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linux/drivers/scsi/aic7xxx_old.c
Jeff Garzik f281233d3e SCSI host lock push-down 
Move the mid-layer's ->queuecommand() invocation from being locked
with the host lock to being unlocked to facilitate speeding up the
critical path for drivers who don't need this lock taken anyway.

The patch below presents a simple SCSI host lock push-down as an
equivalent transformation.  No locking or other behavior should change
with this patch.  All existing bugs and locking orders are preserved.

Additionally, add one parameter to queuecommand,
	struct Scsi_Host *
and remove one parameter from queuecommand,
	void (*done)(struct scsi_cmnd *)

Scsi_Host* is a convenient pointer that most host drivers need anyway,
and 'done' is redundant to struct scsi_cmnd->scsi_done.

Minimal code disturbance was attempted with this change.  Most drivers
needed only two one-line modifications for their host lock push-down.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Acked-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-16 13:33:23 -08:00

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/*+M*************************************************************************
* Adaptec AIC7xxx device driver for Linux.
*
* Copyright (c) 1994 John Aycock
* The University of Calgary Department of Computer Science.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
* driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
* config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
* the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
* the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
* (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
* the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
* ANSI SCSI-2 specification (draft 10c), ...
*
* --------------------------------------------------------------------------
*
* Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
*
* Substantially modified to include support for wide and twin bus
* adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
* SCB paging, and other rework of the code.
*
* Parts of this driver were also based on the FreeBSD driver by
* Justin T. Gibbs. His copyright follows:
*
* --------------------------------------------------------------------------
* Copyright (c) 1994-1997 Justin Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Where this Software is combined with software released under the terms of
* the GNU General Public License ("GPL") and the terms of the GPL would require the
* combined work to also be released under the terms of the GPL, the terms
* and conditions of this License will apply in addition to those of the
* GPL with the exception of any terms or conditions of this License that
* conflict with, or are expressly prohibited by, the GPL.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: aic7xxx.c,v 1.119 1997/06/27 19:39:18 gibbs Exp $
*---------------------------------------------------------------------------
*
* Thanks also go to (in alphabetical order) the following:
*
* Rory Bolt - Sequencer bug fixes
* Jay Estabrook - Initial DEC Alpha support
* Doug Ledford - Much needed abort/reset bug fixes
* Kai Makisara - DMAing of SCBs
*
* A Boot time option was also added for not resetting the scsi bus.
*
* Form: aic7xxx=extended
* aic7xxx=no_reset
* aic7xxx=ultra
* aic7xxx=irq_trigger:[0,1] # 0 edge, 1 level
* aic7xxx=verbose
*
* Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
*
* $Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp $
*-M*************************************************************************/
/*+M**************************************************************************
*
* Further driver modifications made by Doug Ledford <dledford@redhat.com>
*
* Copyright (c) 1997-1999 Doug Ledford
*
* These changes are released under the same licensing terms as the FreeBSD
* driver written by Justin Gibbs. Please see his Copyright notice above
* for the exact terms and conditions covering my changes as well as the
* warranty statement.
*
* Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
* but are not limited to:
*
* 1: Import of the latest FreeBSD sequencer code for this driver
* 2: Modification of kernel code to accommodate different sequencer semantics
* 3: Extensive changes throughout kernel portion of driver to improve
* abort/reset processing and error hanndling
* 4: Other work contributed by various people on the Internet
* 5: Changes to printk information and verbosity selection code
* 6: General reliability related changes, especially in IRQ management
* 7: Modifications to the default probe/attach order for supported cards
* 8: SMP friendliness has been improved
*
* Overall, this driver represents a significant departure from the official
* aic7xxx driver released by Dan Eischen in two ways. First, in the code
* itself. A diff between the two version of the driver is now a several
* thousand line diff. Second, in approach to solving the same problem. The
* problem is importing the FreeBSD aic7xxx driver code to linux can be a
* difficult and time consuming process, that also can be error prone. Dan
* Eischen's official driver uses the approach that the linux and FreeBSD
* drivers should be as identical as possible. To that end, his next version
* of this driver will be using a mid-layer code library that he is developing
* to moderate communications between the linux mid-level SCSI code and the
* low level FreeBSD driver. He intends to be able to essentially drop the
* FreeBSD driver into the linux kernel with only a few minor tweaks to some
* include files and the like and get things working, making for fast easy
* imports of the FreeBSD code into linux.
*
* I disagree with Dan's approach. Not that I don't think his way of doing
* things would be nice, easy to maintain, and create a more uniform driver
* between FreeBSD and Linux. I have no objection to those issues. My
* disagreement is on the needed functionality. There simply are certain
* things that are done differently in FreeBSD than linux that will cause
* problems for this driver regardless of any middle ware Dan implements.
* The biggest example of this at the moment is interrupt semantics. Linux
* doesn't provide the same protection techniques as FreeBSD does, nor can
* they be easily implemented in any middle ware code since they would truly
* belong in the kernel proper and would effect all drivers. For the time
* being, I see issues such as these as major stumbling blocks to the
* reliability of code based upon such middle ware. Therefore, I choose to
* use a different approach to importing the FreeBSD code that doesn't
* involve any middle ware type code. My approach is to import the sequencer
* code from FreeBSD wholesale. Then, to only make changes in the kernel
* portion of the driver as they are needed for the new sequencer semantics.
* In this way, the portion of the driver that speaks to the rest of the
* linux kernel is fairly static and can be changed/modified to solve
* any problems one might encounter without concern for the FreeBSD driver.
*
* Note: If time and experience should prove me wrong that the middle ware
* code Dan writes is reliable in its operation, then I'll retract my above
* statements. But, for those that don't know, I'm from Missouri (in the US)
* and our state motto is "The Show-Me State". Well, before I will put
* faith into it, you'll have to show me that it works :)
*
*_M*************************************************************************/
/*
* The next three defines are user configurable. These should be the only
* defines a user might need to get in here and change. There are other
* defines buried deeper in the code, but those really shouldn't need touched
* under normal conditions.
*/
/*
* AIC7XXX_STRICT_PCI_SETUP
* Should we assume the PCI config options on our controllers are set with
* sane and proper values, or should we be anal about our PCI config
* registers and force them to what we want? The main advantage to
* defining this option is on non-Intel hardware where the BIOS may not
* have been run to set things up, or if you have one of the BIOSless
* Adaptec controllers, such as a 2910, that don't get set up by the
* BIOS. However, keep in mind that we really do set the most important
* items in the driver regardless of this setting, this only controls some
* of the more esoteric PCI options on these cards. In that sense, I
* would default to leaving this off. However, if people wish to try
* things both ways, that would also help me to know if there are some
* machines where it works one way but not another.
*
* -- July 7, 17:09
* OK...I need this on my machine for testing, so the default is to
* leave it defined.
*
* -- July 7, 18:49
* I needed it for testing, but it didn't make any difference, so back
* off she goes.
*
* -- July 16, 23:04
* I turned it back on to try and compensate for the 2.1.x PCI code
* which no longer relies solely on the BIOS and now tries to set
* things itself.
*/
#define AIC7XXX_STRICT_PCI_SETUP
/*
* AIC7XXX_VERBOSE_DEBUGGING
* This option enables a lot of extra printk();s in the code, surrounded
* by if (aic7xxx_verbose ...) statements. Executing all of those if
* statements and the extra checks can get to where it actually does have
* an impact on CPU usage and such, as well as code size. Disabling this
* define will keep some of those from becoming part of the code.
*
* NOTE: Currently, this option has no real effect, I will be adding the
* various #ifdef's in the code later when I've decided a section is
* complete and no longer needs debugging. OK...a lot of things are now
* surrounded by this define, so turning this off does have an impact.
*/
/*
* #define AIC7XXX_VERBOSE_DEBUGGING
*/
#include <linux/module.h>
#include <stdarg.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "aic7xxx_old/aic7xxx.h"
#include "aic7xxx_old/sequencer.h"
#include "aic7xxx_old/scsi_message.h"
#include "aic7xxx_old/aic7xxx_reg.h"
#include <scsi/scsicam.h>
#include <linux/stat.h>
#include <linux/slab.h> /* for kmalloc() */
#define AIC7XXX_C_VERSION "5.2.6"
#define ALL_TARGETS -1
#define ALL_CHANNELS -1
#define ALL_LUNS -1
#define MAX_TARGETS 16
#define MAX_LUNS 8
#ifndef TRUE
# define TRUE 1
#endif
#ifndef FALSE
# define FALSE 0
#endif
#if defined(__powerpc__) || defined(__i386__) || defined(__x86_64__)
# define MMAPIO
#endif
/*
* You can try raising me for better performance or lowering me if you have
* flaky devices that go off the scsi bus when hit with too many tagged
* commands (like some IBM SCSI-3 LVD drives).
*/
#define AIC7XXX_CMDS_PER_DEVICE 32
typedef struct
{
unsigned char tag_commands[16]; /* Allow for wide/twin adapters. */
} adapter_tag_info_t;
/*
* Make a define that will tell the driver not to the default tag depth
* everywhere.
*/
#define DEFAULT_TAG_COMMANDS {0, 0, 0, 0, 0, 0, 0, 0,\
0, 0, 0, 0, 0, 0, 0, 0}
/*
* Modify this as you see fit for your system. By setting tag_commands
* to 0, the driver will use it's own algorithm for determining the
* number of commands to use (see above). When 255, the driver will
* not enable tagged queueing for that particular device. When positive
* (> 0) and (< 255) the values in the array are used for the queue_depth.
* Note that the maximum value for an entry is 254, but you're insane if
* you try to use that many commands on one device.
*
* In this example, the first line will disable tagged queueing for all
* the devices on the first probed aic7xxx adapter.
*
* The second line enables tagged queueing with 4 commands/LUN for IDs
* (1, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
* driver to use its own algorithm for ID 1.
*
* The third line is the same as the first line.
*
* The fourth line disables tagged queueing for devices 0 and 3. It
* enables tagged queueing for the other IDs, with 16 commands/LUN
* for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
* IDs 2, 5-7, and 9-15.
*/
/*
* NOTE: The below structure is for reference only, the actual structure
* to modify in order to change things is found after this fake one.
*
adapter_tag_info_t aic7xxx_tag_info[] =
{
{DEFAULT_TAG_COMMANDS},
{{4, 0, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 255, 4, 4, 4}},
{DEFAULT_TAG_COMMANDS},
{{255, 16, 4, 255, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
};
*/
static adapter_tag_info_t aic7xxx_tag_info[] =
{
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS},
{DEFAULT_TAG_COMMANDS}
};
/*
* Define an array of board names that can be indexed by aha_type.
* Don't forget to change this when changing the types!
*/
static const char *board_names[] = {
"AIC-7xxx Unknown", /* AIC_NONE */
"Adaptec AIC-7810 Hardware RAID Controller", /* AIC_7810 */
"Adaptec AIC-7770 SCSI host adapter", /* AIC_7770 */
"Adaptec AHA-274X SCSI host adapter", /* AIC_7771 */
"Adaptec AHA-284X SCSI host adapter", /* AIC_284x */
"Adaptec AIC-7850 SCSI host adapter", /* AIC_7850 */
"Adaptec AIC-7855 SCSI host adapter", /* AIC_7855 */
"Adaptec AIC-7860 Ultra SCSI host adapter", /* AIC_7860 */
"Adaptec AHA-2940A Ultra SCSI host adapter", /* AIC_7861 */
"Adaptec AIC-7870 SCSI host adapter", /* AIC_7870 */
"Adaptec AHA-294X SCSI host adapter", /* AIC_7871 */
"Adaptec AHA-394X SCSI host adapter", /* AIC_7872 */
"Adaptec AHA-398X SCSI host adapter", /* AIC_7873 */
"Adaptec AHA-2944 SCSI host adapter", /* AIC_7874 */
"Adaptec AIC-7880 Ultra SCSI host adapter", /* AIC_7880 */
"Adaptec AHA-294X Ultra SCSI host adapter", /* AIC_7881 */
"Adaptec AHA-394X Ultra SCSI host adapter", /* AIC_7882 */
"Adaptec AHA-398X Ultra SCSI host adapter", /* AIC_7883 */
"Adaptec AHA-2944 Ultra SCSI host adapter", /* AIC_7884 */
"Adaptec AHA-2940UW Pro Ultra SCSI host adapter", /* AIC_7887 */
"Adaptec AIC-7895 Ultra SCSI host adapter", /* AIC_7895 */
"Adaptec AIC-7890/1 Ultra2 SCSI host adapter", /* AIC_7890 */
"Adaptec AHA-293X Ultra2 SCSI host adapter", /* AIC_7890 */
"Adaptec AHA-294X Ultra2 SCSI host adapter", /* AIC_7890 */
"Adaptec AIC-7896/7 Ultra2 SCSI host adapter", /* AIC_7896 */
"Adaptec AHA-394X Ultra2 SCSI host adapter", /* AIC_7897 */
"Adaptec AHA-395X Ultra2 SCSI host adapter", /* AIC_7897 */
"Adaptec PCMCIA SCSI controller", /* card bus stuff */
"Adaptec AIC-7892 Ultra 160/m SCSI host adapter", /* AIC_7892 */
"Adaptec AIC-7899 Ultra 160/m SCSI host adapter", /* AIC_7899 */
};
/*
* There should be a specific return value for this in scsi.h, but
* it seems that most drivers ignore it.
*/
#define DID_UNDERFLOW DID_ERROR
/*
* What we want to do is have the higher level scsi driver requeue
* the command to us. There is no specific driver status for this
* condition, but the higher level scsi driver will requeue the
* command on a DID_BUS_BUSY error.
*
* Upon further inspection and testing, it seems that DID_BUS_BUSY
* will *always* retry the command. We can get into an infinite loop
* if this happens when we really want some sort of counter that
* will automatically abort/reset the command after so many retries.
* Using DID_ERROR will do just that. (Made by a suggestion by
* Doug Ledford 8/1/96)
*/
#define DID_RETRY_COMMAND DID_ERROR
#define HSCSIID 0x07
#define SCSI_RESET 0x040
/*
* EISA/VL-bus stuff
*/
#define MINSLOT 1
#define MAXSLOT 15
#define SLOTBASE(x) ((x) << 12)
#define BASE_TO_SLOT(x) ((x) >> 12)
/*
* Standard EISA Host ID regs (Offset from slot base)
*/
#define AHC_HID0 0x80 /* 0,1: msb of ID2, 2-7: ID1 */
#define AHC_HID1 0x81 /* 0-4: ID3, 5-7: LSB ID2 */
#define AHC_HID2 0x82 /* product */
#define AHC_HID3 0x83 /* firmware revision */
/*
* AIC-7770 I/O range to reserve for a card
*/
#define MINREG 0xC00
#define MAXREG 0xCFF
#define INTDEF 0x5C /* Interrupt Definition Register */
/*
* AIC-78X0 PCI registers
*/
#define CLASS_PROGIF_REVID 0x08
#define DEVREVID 0x000000FFul
#define PROGINFC 0x0000FF00ul
#define SUBCLASS 0x00FF0000ul
#define BASECLASS 0xFF000000ul
#define CSIZE_LATTIME 0x0C
#define CACHESIZE 0x0000003Ful /* only 5 bits */
#define LATTIME 0x0000FF00ul
#define DEVCONFIG 0x40
#define SCBSIZE32 0x00010000ul /* aic789X only */
#define MPORTMODE 0x00000400ul /* aic7870 only */
#define RAMPSM 0x00000200ul /* aic7870 only */
#define RAMPSM_ULTRA2 0x00000004
#define VOLSENSE 0x00000100ul
#define SCBRAMSEL 0x00000080ul
#define SCBRAMSEL_ULTRA2 0x00000008
#define MRDCEN 0x00000040ul
#define EXTSCBTIME 0x00000020ul /* aic7870 only */
#define EXTSCBPEN 0x00000010ul /* aic7870 only */
#define BERREN 0x00000008ul
#define DACEN 0x00000004ul
#define STPWLEVEL 0x00000002ul
#define DIFACTNEGEN 0x00000001ul /* aic7870 only */
#define SCAMCTL 0x1a /* Ultra2 only */
#define CCSCBBADDR 0xf0 /* aic7895/6/7 */
/*
* Define the different types of SEEPROMs on aic7xxx adapters
* and make it also represent the address size used in accessing
* its registers. The 93C46 chips have 1024 bits organized into
* 64 16-bit words, while the 93C56 chips have 2048 bits organized
* into 128 16-bit words. The C46 chips use 6 bits to address
* each word, while the C56 and C66 (4096 bits) use 8 bits to
* address each word.
*/
typedef enum {C46 = 6, C56_66 = 8} seeprom_chip_type;
/*
*
* Define the format of the SEEPROM registers (16 bits).
*
*/
struct seeprom_config {
/*
* SCSI ID Configuration Flags
*/
#define CFXFER 0x0007 /* synchronous transfer rate */
#define CFSYNCH 0x0008 /* enable synchronous transfer */
#define CFDISC 0x0010 /* enable disconnection */
#define CFWIDEB 0x0020 /* wide bus device (wide card) */
#define CFSYNCHISULTRA 0x0040 /* CFSYNC is an ultra offset */
#define CFNEWULTRAFORMAT 0x0080 /* Use the Ultra2 SEEPROM format */
#define CFSTART 0x0100 /* send start unit SCSI command */
#define CFINCBIOS 0x0200 /* include in BIOS scan */
#define CFRNFOUND 0x0400 /* report even if not found */
#define CFMULTILUN 0x0800 /* probe mult luns in BIOS scan */
#define CFWBCACHEYES 0x4000 /* Enable W-Behind Cache on drive */
#define CFWBCACHENC 0xc000 /* Don't change W-Behind Cache */
/* UNUSED 0x3000 */
unsigned short device_flags[16]; /* words 0-15 */
/*
* BIOS Control Bits
*/
#define CFSUPREM 0x0001 /* support all removable drives */
#define CFSUPREMB 0x0002 /* support removable drives for boot only */
#define CFBIOSEN 0x0004 /* BIOS enabled */
/* UNUSED 0x0008 */
#define CFSM2DRV 0x0010 /* support more than two drives */
#define CF284XEXTEND 0x0020 /* extended translation (284x cards) */
/* UNUSED 0x0040 */
#define CFEXTEND 0x0080 /* extended translation enabled */
/* UNUSED 0xFF00 */
unsigned short bios_control; /* word 16 */
/*
* Host Adapter Control Bits
*/
#define CFAUTOTERM 0x0001 /* Perform Auto termination */
#define CFULTRAEN 0x0002 /* Ultra SCSI speed enable (Ultra cards) */
#define CF284XSELTO 0x0003 /* Selection timeout (284x cards) */
#define CF284XFIFO 0x000C /* FIFO Threshold (284x cards) */
#define CFSTERM 0x0004 /* SCSI low byte termination */
#define CFWSTERM 0x0008 /* SCSI high byte termination (wide card) */
#define CFSPARITY 0x0010 /* SCSI parity */
#define CF284XSTERM 0x0020 /* SCSI low byte termination (284x cards) */
#define CFRESETB 0x0040 /* reset SCSI bus at boot */
#define CFBPRIMARY 0x0100 /* Channel B primary on 7895 chipsets */
#define CFSEAUTOTERM 0x0400 /* aic7890 Perform SE Auto Term */
#define CFLVDSTERM 0x0800 /* aic7890 LVD Termination */
/* UNUSED 0xF280 */
unsigned short adapter_control; /* word 17 */
/*
* Bus Release, Host Adapter ID
*/
#define CFSCSIID 0x000F /* host adapter SCSI ID */
/* UNUSED 0x00F0 */
#define CFBRTIME 0xFF00 /* bus release time */
unsigned short brtime_id; /* word 18 */
/*
* Maximum targets
*/
#define CFMAXTARG 0x00FF /* maximum targets */
/* UNUSED 0xFF00 */
unsigned short max_targets; /* word 19 */
unsigned short res_1[11]; /* words 20-30 */
unsigned short checksum; /* word 31 */
};
#define SELBUS_MASK 0x0a
#define SELNARROW 0x00
#define SELBUSB 0x08
#define SINGLE_BUS 0x00
#define SCB_TARGET(scb) \
(((scb)->hscb->target_channel_lun & TID) >> 4)
#define SCB_LUN(scb) \
((scb)->hscb->target_channel_lun & LID)
#define SCB_IS_SCSIBUS_B(scb) \
(((scb)->hscb->target_channel_lun & SELBUSB) != 0)
/*
* If an error occurs during a data transfer phase, run the command
* to completion - it's easier that way - making a note of the error
* condition in this location. This then will modify a DID_OK status
* into an appropriate error for the higher-level SCSI code.
*/
#define aic7xxx_error(cmd) ((cmd)->SCp.Status)
/*
* Keep track of the targets returned status.
*/
#define aic7xxx_status(cmd) ((cmd)->SCp.sent_command)
/*
* The position of the SCSI commands scb within the scb array.
*/
#define aic7xxx_position(cmd) ((cmd)->SCp.have_data_in)
/*
* The stored DMA mapping for single-buffer data transfers.
*/
#define aic7xxx_mapping(cmd) ((cmd)->SCp.phase)
/*
* Get out private data area from a scsi cmd pointer
*/
#define AIC_DEV(cmd) ((struct aic_dev_data *)(cmd)->device->hostdata)
/*
* So we can keep track of our host structs
*/
static struct aic7xxx_host *first_aic7xxx = NULL;
/*
* As of Linux 2.1, the mid-level SCSI code uses virtual addresses
* in the scatter-gather lists. We need to convert the virtual
* addresses to physical addresses.
*/
struct hw_scatterlist {
unsigned int address;
unsigned int length;
};
/*
* Maximum number of SG segments these cards can support.
*/
#define AIC7XXX_MAX_SG 128
/*
* The maximum number of SCBs we could have for ANY type
* of card. DON'T FORGET TO CHANGE THE SCB MASK IN THE
* SEQUENCER CODE IF THIS IS MODIFIED!
*/
#define AIC7XXX_MAXSCB 255
struct aic7xxx_hwscb {
/* ------------ Begin hardware supported fields ---------------- */
/* 0*/ unsigned char control;
/* 1*/ unsigned char target_channel_lun; /* 4/1/3 bits */
/* 2*/ unsigned char target_status;
/* 3*/ unsigned char SG_segment_count;
/* 4*/ unsigned int SG_list_pointer;
/* 8*/ unsigned char residual_SG_segment_count;
/* 9*/ unsigned char residual_data_count[3];
/*12*/ unsigned int data_pointer;
/*16*/ unsigned int data_count;
/*20*/ unsigned int SCSI_cmd_pointer;
/*24*/ unsigned char SCSI_cmd_length;
/*25*/ unsigned char tag; /* Index into our kernel SCB array.
* Also used as the tag for tagged I/O
*/
#define SCB_PIO_TRANSFER_SIZE 26 /* amount we need to upload/download
* via PIO to initialize a transaction.
*/
/*26*/ unsigned char next; /* Used to thread SCBs awaiting selection
* or disconnected down in the sequencer.
*/
/*27*/ unsigned char prev;
/*28*/ unsigned int pad; /*
* Unused by the kernel, but we require
* the padding so that the array of
* hardware SCBs is aligned on 32 byte
* boundaries so the sequencer can index
*/
};
typedef enum {
SCB_FREE = 0x0000,
SCB_DTR_SCB = 0x0001,
SCB_WAITINGQ = 0x0002,
SCB_ACTIVE = 0x0004,
SCB_SENSE = 0x0008,
SCB_ABORT = 0x0010,
SCB_DEVICE_RESET = 0x0020,
SCB_RESET = 0x0040,
SCB_RECOVERY_SCB = 0x0080,
SCB_MSGOUT_PPR = 0x0100,
SCB_MSGOUT_SENT = 0x0200,
SCB_MSGOUT_SDTR = 0x0400,
SCB_MSGOUT_WDTR = 0x0800,
SCB_MSGOUT_BITS = SCB_MSGOUT_PPR |
SCB_MSGOUT_SENT |
SCB_MSGOUT_SDTR |
SCB_MSGOUT_WDTR,
SCB_QUEUED_ABORT = 0x1000,
SCB_QUEUED_FOR_DONE = 0x2000,
SCB_WAS_BUSY = 0x4000,
SCB_QUEUE_FULL = 0x8000
} scb_flag_type;
typedef enum {
AHC_FNONE = 0x00000000,
AHC_PAGESCBS = 0x00000001,
AHC_CHANNEL_B_PRIMARY = 0x00000002,
AHC_USEDEFAULTS = 0x00000004,
AHC_INDIRECT_PAGING = 0x00000008,
AHC_CHNLB = 0x00000020,
AHC_CHNLC = 0x00000040,
AHC_EXTEND_TRANS_A = 0x00000100,
AHC_EXTEND_TRANS_B = 0x00000200,
AHC_TERM_ENB_A = 0x00000400,
AHC_TERM_ENB_SE_LOW = 0x00000400,
AHC_TERM_ENB_B = 0x00000800,
AHC_TERM_ENB_SE_HIGH = 0x00000800,
AHC_HANDLING_REQINITS = 0x00001000,
AHC_TARGETMODE = 0x00002000,
AHC_NEWEEPROM_FMT = 0x00004000,
/*
* Here ends the FreeBSD defined flags and here begins the linux defined
* flags. NOTE: I did not preserve the old flag name during this change
* specifically to force me to evaluate what flags were being used properly
* and what flags weren't. This way, I could clean up the flag usage on
* a use by use basis. Doug Ledford
*/
AHC_MOTHERBOARD = 0x00020000,
AHC_NO_STPWEN = 0x00040000,
AHC_RESET_DELAY = 0x00080000,
AHC_A_SCANNED = 0x00100000,
AHC_B_SCANNED = 0x00200000,
AHC_MULTI_CHANNEL = 0x00400000,
AHC_BIOS_ENABLED = 0x00800000,
AHC_SEEPROM_FOUND = 0x01000000,
AHC_TERM_ENB_LVD = 0x02000000,
AHC_ABORT_PENDING = 0x04000000,
AHC_RESET_PENDING = 0x08000000,
#define AHC_IN_ISR_BIT 28
AHC_IN_ISR = 0x10000000,
AHC_IN_ABORT = 0x20000000,
AHC_IN_RESET = 0x40000000,
AHC_EXTERNAL_SRAM = 0x80000000
} ahc_flag_type;
typedef enum {
AHC_NONE = 0x0000,
AHC_CHIPID_MASK = 0x00ff,
AHC_AIC7770 = 0x0001,
AHC_AIC7850 = 0x0002,
AHC_AIC7860 = 0x0003,
AHC_AIC7870 = 0x0004,
AHC_AIC7880 = 0x0005,
AHC_AIC7890 = 0x0006,
AHC_AIC7895 = 0x0007,
AHC_AIC7896 = 0x0008,
AHC_AIC7892 = 0x0009,
AHC_AIC7899 = 0x000a,
AHC_VL = 0x0100,
AHC_EISA = 0x0200,
AHC_PCI = 0x0400,
} ahc_chip;
typedef enum {
AHC_FENONE = 0x0000,
AHC_ULTRA = 0x0001,
AHC_ULTRA2 = 0x0002,
AHC_WIDE = 0x0004,
AHC_TWIN = 0x0008,
AHC_MORE_SRAM = 0x0010,
AHC_CMD_CHAN = 0x0020,
AHC_QUEUE_REGS = 0x0040,
AHC_SG_PRELOAD = 0x0080,
AHC_SPIOCAP = 0x0100,
AHC_ULTRA3 = 0x0200,
AHC_NEW_AUTOTERM = 0x0400,
AHC_AIC7770_FE = AHC_FENONE,
AHC_AIC7850_FE = AHC_SPIOCAP,
AHC_AIC7860_FE = AHC_ULTRA|AHC_SPIOCAP,
AHC_AIC7870_FE = AHC_FENONE,
AHC_AIC7880_FE = AHC_ULTRA,
AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2|
AHC_QUEUE_REGS|AHC_SG_PRELOAD|AHC_NEW_AUTOTERM,
AHC_AIC7895_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA,
AHC_AIC7896_FE = AHC_AIC7890_FE,
AHC_AIC7892_FE = AHC_AIC7890_FE|AHC_ULTRA3,
AHC_AIC7899_FE = AHC_AIC7890_FE|AHC_ULTRA3,
} ahc_feature;
#define SCB_DMA_ADDR(scb, addr) ((unsigned long)(addr) + (scb)->scb_dma->dma_offset)
struct aic7xxx_scb_dma {
unsigned long dma_offset; /* Correction you have to add
* to virtual address to get
* dma handle in this region */
dma_addr_t dma_address; /* DMA handle of the start,
* for unmap */
unsigned int dma_len; /* DMA length */
};
typedef enum {
AHC_BUG_NONE = 0x0000,
AHC_BUG_TMODE_WIDEODD = 0x0001,
AHC_BUG_AUTOFLUSH = 0x0002,
AHC_BUG_CACHETHEN = 0x0004,
AHC_BUG_CACHETHEN_DIS = 0x0008,
AHC_BUG_PCI_2_1_RETRY = 0x0010,
AHC_BUG_PCI_MWI = 0x0020,
AHC_BUG_SCBCHAN_UPLOAD = 0x0040,
} ahc_bugs;
struct aic7xxx_scb {
struct aic7xxx_hwscb *hscb; /* corresponding hardware scb */
struct scsi_cmnd *cmd; /* scsi_cmnd for this scb */
struct aic7xxx_scb *q_next; /* next scb in queue */
volatile scb_flag_type flags; /* current state of scb */
struct hw_scatterlist *sg_list; /* SG list in adapter format */
unsigned char tag_action;
unsigned char sg_count;
unsigned char *sense_cmd; /*
* Allocate 6 characters for
* sense command.
*/
unsigned char *cmnd;
unsigned int sg_length; /*
* We init this during
* buildscb so we don't have
* to calculate anything during
* underflow/overflow/stat code
*/
void *kmalloc_ptr;
struct aic7xxx_scb_dma *scb_dma;
};
/*
* Define a linked list of SCBs.
*/
typedef struct {
struct aic7xxx_scb *head;
struct aic7xxx_scb *tail;
} scb_queue_type;
static struct {
unsigned char errno;
const char *errmesg;
} hard_error[] = {
{ ILLHADDR, "Illegal Host Access" },
{ ILLSADDR, "Illegal Sequencer Address referenced" },
{ ILLOPCODE, "Illegal Opcode in sequencer program" },
{ SQPARERR, "Sequencer Ram Parity Error" },
{ DPARERR, "Data-Path Ram Parity Error" },
{ MPARERR, "Scratch Ram/SCB Array Ram Parity Error" },
{ PCIERRSTAT,"PCI Error detected" },
{ CIOPARERR, "CIOBUS Parity Error" }
};
static unsigned char
generic_sense[] = { REQUEST_SENSE, 0, 0, 0, 255, 0 };
typedef struct {
scb_queue_type free_scbs; /*
* SCBs assigned to free slot on
* card (no paging required)
*/
struct aic7xxx_scb *scb_array[AIC7XXX_MAXSCB];
struct aic7xxx_hwscb *hscbs;
unsigned char numscbs; /* current number of scbs */
unsigned char maxhscbs; /* hardware scbs */
unsigned char maxscbs; /* max scbs including pageable scbs */
dma_addr_t hscbs_dma; /* DMA handle to hscbs */
unsigned int hscbs_dma_len; /* length of the above DMA area */
void *hscb_kmalloc_ptr;
} scb_data_type;
struct target_cmd {
unsigned char mesg_bytes[4];
unsigned char command[28];
};
#define AHC_TRANS_CUR 0x0001
#define AHC_TRANS_ACTIVE 0x0002
#define AHC_TRANS_GOAL 0x0004
#define AHC_TRANS_USER 0x0008
#define AHC_TRANS_QUITE 0x0010
typedef struct {
unsigned char width;
unsigned char period;
unsigned char offset;
unsigned char options;
} transinfo_type;
struct aic_dev_data {
volatile scb_queue_type delayed_scbs;
volatile unsigned short temp_q_depth;
unsigned short max_q_depth;
volatile unsigned char active_cmds;
/*
* Statistics Kept:
*
* Total Xfers (count for each command that has a data xfer),
* broken down by reads && writes.
*
* Further sorted into a few bins for keeping tabs on how many commands
* we get of various sizes.
*
*/
long w_total; /* total writes */
long r_total; /* total reads */
long barrier_total; /* total num of REQ_BARRIER commands */
long ordered_total; /* How many REQ_BARRIER commands we
used ordered tags to satisfy */
long w_bins[6]; /* binned write */
long r_bins[6]; /* binned reads */
transinfo_type cur;
transinfo_type goal;
#define BUS_DEVICE_RESET_PENDING 0x01
#define DEVICE_RESET_DELAY 0x02
#define DEVICE_PRINT_DTR 0x04
#define DEVICE_WAS_BUSY 0x08
#define DEVICE_DTR_SCANNED 0x10
#define DEVICE_SCSI_3 0x20
volatile unsigned char flags;
unsigned needppr:1;
unsigned needppr_copy:1;
unsigned needsdtr:1;
unsigned needsdtr_copy:1;
unsigned needwdtr:1;
unsigned needwdtr_copy:1;
unsigned dtr_pending:1;
struct scsi_device *SDptr;
struct list_head list;
};
/*
* Define a structure used for each host adapter. Note, in order to avoid
* problems with architectures I can't test on (because I don't have one,
* such as the Alpha based systems) which happen to give faults for
* non-aligned memory accesses, care was taken to align this structure
* in a way that gauranteed all accesses larger than 8 bits were aligned
* on the appropriate boundary. It's also organized to try and be more
* cache line efficient. Be careful when changing this lest you might hurt
* overall performance and bring down the wrath of the masses.
*/
struct aic7xxx_host {
/*
* This is the first 64 bytes in the host struct
*/
/*
* We are grouping things here....first, items that get either read or
* written with nearly every interrupt
*/
volatile long flags;
ahc_feature features; /* chip features */
unsigned long base; /* card base address */
volatile unsigned char __iomem *maddr; /* memory mapped address */
unsigned long isr_count; /* Interrupt count */
unsigned long spurious_int;
scb_data_type *scb_data;
struct aic7xxx_cmd_queue {
struct scsi_cmnd *head;
struct scsi_cmnd *tail;
} completeq;
/*
* Things read/written on nearly every entry into aic7xxx_queue()
*/
volatile scb_queue_type waiting_scbs;
unsigned char unpause; /* unpause value for HCNTRL */
unsigned char pause; /* pause value for HCNTRL */
volatile unsigned char qoutfifonext;
volatile unsigned char activescbs; /* active scbs */
volatile unsigned char max_activescbs;
volatile unsigned char qinfifonext;
volatile unsigned char *untagged_scbs;
volatile unsigned char *qoutfifo;
volatile unsigned char *qinfifo;
unsigned char dev_last_queue_full[MAX_TARGETS];
unsigned char dev_last_queue_full_count[MAX_TARGETS];
unsigned short ultraenb; /* Gets downloaded to card as a bitmap */
unsigned short discenable; /* Gets downloaded to card as a bitmap */
transinfo_type user[MAX_TARGETS];
unsigned char msg_buf[13]; /* The message for the target */
unsigned char msg_type;
#define MSG_TYPE_NONE 0x00
#define MSG_TYPE_INITIATOR_MSGOUT 0x01
#define MSG_TYPE_INITIATOR_MSGIN 0x02
unsigned char msg_len; /* Length of message */
unsigned char msg_index; /* Index into msg_buf array */
/*
* We put the less frequently used host structure items
* after the more frequently used items to try and ease
* the burden on the cache subsystem.
* These entries are not *commonly* accessed, whereas
* the preceding entries are accessed very often.
*/
unsigned int irq; /* IRQ for this adapter */
int instance; /* aic7xxx instance number */
int scsi_id; /* host adapter SCSI ID */
int scsi_id_b; /* channel B for twin adapters */
unsigned int bios_address;
int board_name_index;
unsigned short bios_control; /* bios control - SEEPROM */
unsigned short adapter_control; /* adapter control - SEEPROM */
struct pci_dev *pdev;
unsigned char pci_bus;
unsigned char pci_device_fn;
struct seeprom_config sc;
unsigned short sc_type;
unsigned short sc_size;
struct aic7xxx_host *next; /* allow for multiple IRQs */
struct Scsi_Host *host; /* pointer to scsi host */
struct list_head aic_devs; /* all aic_dev structs on host */
int host_no; /* SCSI host number */
unsigned long mbase; /* I/O memory address */
ahc_chip chip; /* chip type */
ahc_bugs bugs;
dma_addr_t fifo_dma; /* DMA handle for fifo arrays */
};
/*
* Valid SCSIRATE values. (p. 3-17)
* Provides a mapping of transfer periods in ns/4 to the proper value to
* stick in the SCSIRATE reg to use that transfer rate.
*/
#define AHC_SYNCRATE_ULTRA3 0
#define AHC_SYNCRATE_ULTRA2 1
#define AHC_SYNCRATE_ULTRA 3
#define AHC_SYNCRATE_FAST 6
#define AHC_SYNCRATE_CRC 0x40
#define AHC_SYNCRATE_SE 0x10
static struct aic7xxx_syncrate {
/* Rates in Ultra mode have bit 8 of sxfr set */
#define ULTRA_SXFR 0x100
int sxfr_ultra2;
int sxfr;
unsigned char period;
const char *rate[2];
} aic7xxx_syncrates[] = {
{ 0x42, 0x000, 9, {"80.0", "160.0"} },
{ 0x13, 0x000, 10, {"40.0", "80.0"} },
{ 0x14, 0x000, 11, {"33.0", "66.6"} },
{ 0x15, 0x100, 12, {"20.0", "40.0"} },
{ 0x16, 0x110, 15, {"16.0", "32.0"} },
{ 0x17, 0x120, 18, {"13.4", "26.8"} },
{ 0x18, 0x000, 25, {"10.0", "20.0"} },
{ 0x19, 0x010, 31, {"8.0", "16.0"} },
{ 0x1a, 0x020, 37, {"6.67", "13.3"} },
{ 0x1b, 0x030, 43, {"5.7", "11.4"} },
{ 0x10, 0x040, 50, {"5.0", "10.0"} },
{ 0x00, 0x050, 56, {"4.4", "8.8" } },
{ 0x00, 0x060, 62, {"4.0", "8.0" } },
{ 0x00, 0x070, 68, {"3.6", "7.2" } },
{ 0x00, 0x000, 0, {NULL, NULL} },
};
#define CTL_OF_SCB(scb) (((scb->hscb)->target_channel_lun >> 3) & 0x1), \
(((scb->hscb)->target_channel_lun >> 4) & 0xf), \
((scb->hscb)->target_channel_lun & 0x07)
#define CTL_OF_CMD(cmd) ((cmd->device->channel) & 0x01), \
((cmd->device->id) & 0x0f), \
((cmd->device->lun) & 0x07)
#define TARGET_INDEX(cmd) ((cmd)->device->id | ((cmd)->device->channel << 3))
/*
* A nice little define to make doing our printks a little easier
*/
#define WARN_LEAD KERN_WARNING "(scsi%d:%d:%d:%d) "
#define INFO_LEAD KERN_INFO "(scsi%d:%d:%d:%d) "
/*
* XXX - these options apply unilaterally to _all_ 274x/284x/294x
* cards in the system. This should be fixed. Exceptions to this
* rule are noted in the comments.
*/
/*
* Use this as the default queue depth when setting tagged queueing on.
*/
static unsigned int aic7xxx_default_queue_depth = AIC7XXX_CMDS_PER_DEVICE;
/*
* Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
* has no effect on any later resets that might occur due to things like
* SCSI bus timeouts.
*/
static unsigned int aic7xxx_no_reset = 0;
/*
* Certain PCI motherboards will scan PCI devices from highest to lowest,
* others scan from lowest to highest, and they tend to do all kinds of
* strange things when they come into contact with PCI bridge chips. The
* net result of all this is that the PCI card that is actually used to boot
* the machine is very hard to detect. Most motherboards go from lowest
* PCI slot number to highest, and the first SCSI controller found is the
* one you boot from. The only exceptions to this are when a controller
* has its BIOS disabled. So, we by default sort all of our SCSI controllers
* from lowest PCI slot number to highest PCI slot number. We also force
* all controllers with their BIOS disabled to the end of the list. This
* works on *almost* all computers. Where it doesn't work, we have this
* option. Setting this option to non-0 will reverse the order of the sort
* to highest first, then lowest, but will still leave cards with their BIOS
* disabled at the very end. That should fix everyone up unless there are
* really strange cirumstances.
*/
static int aic7xxx_reverse_scan = 0;
/*
* Should we force EXTENDED translation on a controller.
* 0 == Use whatever is in the SEEPROM or default to off
* 1 == Use whatever is in the SEEPROM or default to on
*/
static unsigned int aic7xxx_extended = 0;
/*
* The IRQ trigger method used on EISA controllers. Does not effect PCI cards.
* -1 = Use detected settings.
* 0 = Force Edge triggered mode.
* 1 = Force Level triggered mode.
*/
static int aic7xxx_irq_trigger = -1;
/*
* This variable is used to override the termination settings on a controller.
* This should not be used under normal conditions. However, in the case
* that a controller does not have a readable SEEPROM (so that we can't
* read the SEEPROM settings directly) and that a controller has a buggered
* version of the cable detection logic, this can be used to force the
* correct termination. It is preferable to use the manual termination
* settings in the BIOS if possible, but some motherboard controllers store
* those settings in a format we can't read. In other cases, auto term
* should also work, but the chipset was put together with no auto term
* logic (common on motherboard controllers). In those cases, we have
* 32 bits here to work with. That's good for 8 controllers/channels. The
* bits are organized as 4 bits per channel, with scsi0 getting the lowest
* 4 bits in the int. A 1 in a bit position indicates the termination setting
* that corresponds to that bit should be enabled, a 0 is disabled.
* It looks something like this:
*
* 0x0f = 1111-Single Ended Low Byte Termination on/off
* ||\-Single Ended High Byte Termination on/off
* |\-LVD Low Byte Termination on/off
* \-LVD High Byte Termination on/off
*
* For non-Ultra2 controllers, the upper 2 bits are not important. So, to
* enable both high byte and low byte termination on scsi0, I would need to
* make sure that the override_term variable was set to 0x03 (bits 0011).
* To make sure that all termination is enabled on an Ultra2 controller at
* scsi2 and only high byte termination on scsi1 and high and low byte
* termination on scsi0, I would set override_term=0xf23 (bits 1111 0010 0011)
*
* For the most part, users should never have to use this, that's why I
* left it fairly cryptic instead of easy to understand. If you need it,
* most likely someone will be telling you what your's needs to be set to.
*/
static int aic7xxx_override_term = -1;
/*
* Certain motherboard chipset controllers tend to screw
* up the polarity of the term enable output pin. Use this variable
* to force the correct polarity for your system. This is a bitfield variable
* similar to the previous one, but this one has one bit per channel instead
* of four.
* 0 = Force the setting to active low.
* 1 = Force setting to active high.
* Most Adaptec cards are active high, several motherboards are active low.
* To force a 2940 card at SCSI 0 to active high and a motherboard 7895
* controller at scsi1 and scsi2 to active low, and a 2910 card at scsi3
* to active high, you would need to set stpwlev=0x9 (bits 1001).
*
* People shouldn't need to use this, but if you are experiencing lots of
* SCSI timeout problems, this may help. There is one sure way to test what
* this option needs to be. Using a boot floppy to boot the system, configure
* your system to enable all SCSI termination (in the Adaptec SCSI BIOS) and
* if needed then also pass a value to override_term to make sure that the
* driver is enabling SCSI termination, then set this variable to either 0
* or 1. When the driver boots, make sure there are *NO* SCSI cables
* connected to your controller. If it finds and inits the controller
* without problem, then the setting you passed to stpwlev was correct. If
* the driver goes into a reset loop and hangs the system, then you need the
* other setting for this variable. If neither setting lets the machine
* boot then you have definite termination problems that may not be fixable.
*/
static int aic7xxx_stpwlev = -1;
/*
* Set this to non-0 in order to force the driver to panic the kernel
* and print out debugging info on a SCSI abort or reset cycle.
*/
static int aic7xxx_panic_on_abort = 0;
/*
* PCI bus parity checking of the Adaptec controllers. This is somewhat
* dubious at best. To my knowledge, this option has never actually
* solved a PCI parity problem, but on certain machines with broken PCI
* chipset configurations, it can generate tons of false error messages.
* It's included in the driver for completeness.
* 0 = Shut off PCI parity check
* -1 = Normal polarity pci parity checking
* 1 = reverse polarity pci parity checking
*
* NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
* variable to -1 you would actually want to simply pass the variable
* name without a number. That will invert the 0 which will result in
* -1.
*/
static int aic7xxx_pci_parity = 0;
/*
* Set this to any non-0 value to cause us to dump the contents of all
* the card's registers in a hex dump format tailored to each model of
* controller.
*
* NOTE: THE CONTROLLER IS LEFT IN AN UNUSEABLE STATE BY THIS OPTION.
* YOU CANNOT BOOT UP WITH THIS OPTION, IT IS FOR DEBUGGING PURPOSES
* ONLY
*/
static int aic7xxx_dump_card = 0;
/*
* Set this to a non-0 value to make us dump out the 32 bit instruction
* registers on the card after completing the sequencer download. This
* allows the actual sequencer download to be verified. It is possible
* to use this option and still boot up and run your system. This is
* only intended for debugging purposes.
*/
static int aic7xxx_dump_sequencer = 0;
/*
* Certain newer motherboards have put new PCI based devices into the
* IO spaces that used to typically be occupied by VLB or EISA cards.
* This overlap can cause these newer motherboards to lock up when scanned
* for older EISA and VLB devices. Setting this option to non-0 will
* cause the driver to skip scanning for any VLB or EISA controllers and
* only support the PCI controllers. NOTE: this means that if the kernel
* os compiled with PCI support disabled, then setting this to non-0
* would result in never finding any devices :)
*/
static int aic7xxx_no_probe = 0;
/*
* On some machines, enabling the external SCB RAM isn't reliable yet. I
* haven't had time to make test patches for things like changing the
* timing mode on that external RAM either. Some of those changes may
* fix the problem. Until then though, we default to external SCB RAM
* off and give a command line option to enable it.
*/
static int aic7xxx_scbram = 0;
/*
* So that we can set how long each device is given as a selection timeout.
* The table of values goes like this:
* 0 - 256ms
* 1 - 128ms
* 2 - 64ms
* 3 - 32ms
* We default to 64ms because it's fast. Some old SCSI-I devices need a
* longer time. The final value has to be left shifted by 3, hence 0x10
* is the final value.
*/
static int aic7xxx_seltime = 0x10;
/*
* So that insmod can find the variable and make it point to something
*/
#ifdef MODULE
static char * aic7xxx = NULL;
module_param(aic7xxx, charp, 0);
#endif
#define VERBOSE_NORMAL 0x0000
#define VERBOSE_NEGOTIATION 0x0001
#define VERBOSE_SEQINT 0x0002
#define VERBOSE_SCSIINT 0x0004
#define VERBOSE_PROBE 0x0008
#define VERBOSE_PROBE2 0x0010
#define VERBOSE_NEGOTIATION2 0x0020
#define VERBOSE_MINOR_ERROR 0x0040
#define VERBOSE_TRACING 0x0080
#define VERBOSE_ABORT 0x0f00
#define VERBOSE_ABORT_MID 0x0100
#define VERBOSE_ABORT_FIND 0x0200
#define VERBOSE_ABORT_PROCESS 0x0400
#define VERBOSE_ABORT_RETURN 0x0800
#define VERBOSE_RESET 0xf000
#define VERBOSE_RESET_MID 0x1000
#define VERBOSE_RESET_FIND 0x2000
#define VERBOSE_RESET_PROCESS 0x4000
#define VERBOSE_RESET_RETURN 0x8000
static int aic7xxx_verbose = VERBOSE_NORMAL | VERBOSE_NEGOTIATION |
VERBOSE_PROBE; /* verbose messages */
/****************************************************************************
*
* We're going to start putting in function declarations so that order of
* functions is no longer important. As needed, they are added here.
*
***************************************************************************/
static int aic7xxx_release(struct Scsi_Host *host);
static void aic7xxx_set_syncrate(struct aic7xxx_host *p,
struct aic7xxx_syncrate *syncrate, int target, int channel,
unsigned int period, unsigned int offset, unsigned char options,
unsigned int type, struct aic_dev_data *aic_dev);
static void aic7xxx_set_width(struct aic7xxx_host *p, int target, int channel,
int lun, unsigned int width, unsigned int type,
struct aic_dev_data *aic_dev);
static void aic7xxx_panic_abort(struct aic7xxx_host *p, struct scsi_cmnd *cmd);
static void aic7xxx_print_card(struct aic7xxx_host *p);
static void aic7xxx_print_scratch_ram(struct aic7xxx_host *p);
static void aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded);
#ifdef AIC7XXX_VERBOSE_DEBUGGING
static void aic7xxx_check_scbs(struct aic7xxx_host *p, char *buffer);
#endif
/****************************************************************************
*
* These functions are now used. They happen to be wrapped in useless
* inb/outb port read/writes around the real reads and writes because it
* seems that certain very fast CPUs have a problem dealing with us when
* going at full speed.
*
***************************************************************************/
static unsigned char
aic_inb(struct aic7xxx_host *p, long port)
{
#ifdef MMAPIO
unsigned char x;
if(p->maddr)
{
x = readb(p->maddr + port);
}
else
{
x = inb(p->base + port);
}
return(x);
#else
return(inb(p->base + port));
#endif
}
static void
aic_outb(struct aic7xxx_host *p, unsigned char val, long port)
{
#ifdef MMAPIO
if(p->maddr)
{
writeb(val, p->maddr + port);
mb(); /* locked operation in order to force CPU ordering */
readb(p->maddr + HCNTRL); /* dummy read to flush the PCI write */
}
else
{
outb(val, p->base + port);
mb(); /* locked operation in order to force CPU ordering */
}
#else
outb(val, p->base + port);
mb(); /* locked operation in order to force CPU ordering */
#endif
}
/*+F*************************************************************************
* Function:
* aic7xxx_setup
*
* Description:
* Handle Linux boot parameters. This routine allows for assigning a value
* to a parameter with a ':' between the parameter and the value.
* ie. aic7xxx=unpause:0x0A,extended
*-F*************************************************************************/
static int
aic7xxx_setup(char *s)
{
int i, n;
char *p;
char *end;
static struct {
const char *name;
unsigned int *flag;
} options[] = {
{ "extended", &aic7xxx_extended },
{ "no_reset", &aic7xxx_no_reset },
{ "irq_trigger", &aic7xxx_irq_trigger },
{ "verbose", &aic7xxx_verbose },
{ "reverse_scan",&aic7xxx_reverse_scan },
{ "override_term", &aic7xxx_override_term },
{ "stpwlev", &aic7xxx_stpwlev },
{ "no_probe", &aic7xxx_no_probe },
{ "panic_on_abort", &aic7xxx_panic_on_abort },
{ "pci_parity", &aic7xxx_pci_parity },
{ "dump_card", &aic7xxx_dump_card },
{ "dump_sequencer", &aic7xxx_dump_sequencer },
{ "default_queue_depth", &aic7xxx_default_queue_depth },
{ "scbram", &aic7xxx_scbram },
{ "seltime", &aic7xxx_seltime },
{ "tag_info", NULL }
};
end = strchr(s, '\0');
while ((p = strsep(&s, ",.")) != NULL)
{
for (i = 0; i < ARRAY_SIZE(options); i++)
{
n = strlen(options[i].name);
if (!strncmp(options[i].name, p, n))
{
if (!strncmp(p, "tag_info", n))
{
if (p[n] == ':')
{
char *base;
char *tok, *tok_end, *tok_end2;
char tok_list[] = { '.', ',', '{', '}', '\0' };
int i, instance = -1, device = -1;
unsigned char done = FALSE;
base = p;
tok = base + n + 1; /* Forward us just past the ':' */
tok_end = strchr(tok, '\0');
if (tok_end < end)
*tok_end = ',';
while(!done)
{
switch(*tok)
{
case '{':
if (instance == -1)
instance = 0;
else if (device == -1)
device = 0;
tok++;
break;
case '}':
if (device != -1)
device = -1;
else if (instance != -1)
instance = -1;
tok++;
break;
case ',':
case '.':
if (instance == -1)
done = TRUE;
else if (device >= 0)
device++;
else if (instance >= 0)
instance++;
if ( (device >= MAX_TARGETS) ||
(instance >= ARRAY_SIZE(aic7xxx_tag_info)) )
done = TRUE;
tok++;
if (!done)
{
base = tok;
}
break;
case '\0':
done = TRUE;
break;
default:
done = TRUE;
tok_end = strchr(tok, '\0');
for(i=0; tok_list[i]; i++)
{
tok_end2 = strchr(tok, tok_list[i]);
if ( (tok_end2) && (tok_end2 < tok_end) )
{
tok_end = tok_end2;
done = FALSE;
}
}
if ( (instance >= 0) && (device >= 0) &&
(instance < ARRAY_SIZE(aic7xxx_tag_info)) &&
(device < MAX_TARGETS) )
aic7xxx_tag_info[instance].tag_commands[device] =
simple_strtoul(tok, NULL, 0) & 0xff;
tok = tok_end;
break;
}
}
while((p != base) && (p != NULL))
p = strsep(&s, ",.");
}
}
else if (p[n] == ':')
{
*(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
if(!strncmp(p, "seltime", n))
{
*(options[i].flag) = (*(options[i].flag) % 4) << 3;
}
}
else if (!strncmp(p, "verbose", n))
{
*(options[i].flag) = 0xff29;
}
else
{
*(options[i].flag) = ~(*(options[i].flag));
if(!strncmp(p, "seltime", n))
{
*(options[i].flag) = (*(options[i].flag) % 4) << 3;
}
}
}
}
}
return 1;
}
__setup("aic7xxx=", aic7xxx_setup);
/*+F*************************************************************************
* Function:
* pause_sequencer
*
* Description:
* Pause the sequencer and wait for it to actually stop - this
* is important since the sequencer can disable pausing for critical
* sections.
*-F*************************************************************************/
static void
pause_sequencer(struct aic7xxx_host *p)
{
aic_outb(p, p->pause, HCNTRL);
while ((aic_inb(p, HCNTRL) & PAUSE) == 0)
{
;
}
if(p->features & AHC_ULTRA2)
{
aic_inb(p, CCSCBCTL);
}
}
/*+F*************************************************************************
* Function:
* unpause_sequencer
*
* Description:
* Unpause the sequencer. Unremarkable, yet done often enough to
* warrant an easy way to do it.
*-F*************************************************************************/
static void
unpause_sequencer(struct aic7xxx_host *p, int unpause_always)
{
if (unpause_always ||
( !(aic_inb(p, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) &&
!(p->flags & AHC_HANDLING_REQINITS) ) )
{
aic_outb(p, p->unpause, HCNTRL);
}
}
/*+F*************************************************************************
* Function:
* restart_sequencer
*
* Description:
* Restart the sequencer program from address zero. This assumes
* that the sequencer is already paused.
*-F*************************************************************************/
static void
restart_sequencer(struct aic7xxx_host *p)
{
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
aic_outb(p, FASTMODE, SEQCTL);
}
/*
* We include the aic7xxx_seq.c file here so that the other defines have
* already been made, and so that it comes before the code that actually
* downloads the instructions (since we don't typically use function
* prototype, our code has to be ordered that way, it's a left-over from
* the original driver days.....I should fix it some time DL).
*/
#include "aic7xxx_old/aic7xxx_seq.c"
/*+F*************************************************************************
* Function:
* aic7xxx_check_patch
*
* Description:
* See if the next patch to download should be downloaded.
*-F*************************************************************************/
static int
aic7xxx_check_patch(struct aic7xxx_host *p,
struct sequencer_patch **start_patch, int start_instr, int *skip_addr)
{
struct sequencer_patch *cur_patch;
struct sequencer_patch *last_patch;
int num_patches;
num_patches = ARRAY_SIZE(sequencer_patches);
last_patch = &sequencer_patches[num_patches];
cur_patch = *start_patch;
while ((cur_patch < last_patch) && (start_instr == cur_patch->begin))
{
if (cur_patch->patch_func(p) == 0)
{
/*
* Start rejecting code.
*/
*skip_addr = start_instr + cur_patch->skip_instr;
cur_patch += cur_patch->skip_patch;
}
else
{
/*
* Found an OK patch. Advance the patch pointer to the next patch
* and wait for our instruction pointer to get here.
*/
cur_patch++;
}
}
*start_patch = cur_patch;
if (start_instr < *skip_addr)
/*
* Still skipping
*/
return (0);
return(1);
}
/*+F*************************************************************************
* Function:
* aic7xxx_download_instr
*
* Description:
* Find the next patch to download.
*-F*************************************************************************/
static void
aic7xxx_download_instr(struct aic7xxx_host *p, int instrptr,
unsigned char *dconsts)
{
union ins_formats instr;
struct ins_format1 *fmt1_ins;
struct ins_format3 *fmt3_ins;
unsigned char opcode;
instr = *(union ins_formats*) &seqprog[instrptr * 4];
instr.integer = le32_to_cpu(instr.integer);
fmt1_ins = &instr.format1;
fmt3_ins = NULL;
/* Pull the opcode */
opcode = instr.format1.opcode;
switch (opcode)
{
case AIC_OP_JMP:
case AIC_OP_JC:
case AIC_OP_JNC:
case AIC_OP_CALL:
case AIC_OP_JNE:
case AIC_OP_JNZ:
case AIC_OP_JE:
case AIC_OP_JZ:
{
struct sequencer_patch *cur_patch;
int address_offset;
unsigned int address;
int skip_addr;
int i;
fmt3_ins = &instr.format3;
address_offset = 0;
address = fmt3_ins->address;
cur_patch = sequencer_patches;
skip_addr = 0;
for (i = 0; i < address;)
{
aic7xxx_check_patch(p, &cur_patch, i, &skip_addr);
if (skip_addr > i)
{
int end_addr;
end_addr = min_t(int, address, skip_addr);
address_offset += end_addr - i;
i = skip_addr;
}
else
{
i++;
}
}
address -= address_offset;
fmt3_ins->address = address;
/* Fall Through to the next code section */
}
case AIC_OP_OR:
case AIC_OP_AND:
case AIC_OP_XOR:
case AIC_OP_ADD:
case AIC_OP_ADC:
case AIC_OP_BMOV:
if (fmt1_ins->parity != 0)
{
fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
}
fmt1_ins->parity = 0;
/* Fall Through to the next code section */
case AIC_OP_ROL:
if ((p->features & AHC_ULTRA2) != 0)
{
int i, count;
/* Calculate odd parity for the instruction */
for ( i=0, count=0; i < 31; i++)
{
unsigned int mask;
mask = 0x01 << i;
if ((instr.integer & mask) != 0)
count++;
}
if (!(count & 0x01))
instr.format1.parity = 1;
}
else
{
if (fmt3_ins != NULL)
{
instr.integer = fmt3_ins->immediate |
(fmt3_ins->source << 8) |
(fmt3_ins->address << 16) |
(fmt3_ins->opcode << 25);
}
else
{
instr.integer = fmt1_ins->immediate |
(fmt1_ins->source << 8) |
(fmt1_ins->destination << 16) |
(fmt1_ins->ret << 24) |
(fmt1_ins->opcode << 25);
}
}
aic_outb(p, (instr.integer & 0xff), SEQRAM);
aic_outb(p, ((instr.integer >> 8) & 0xff), SEQRAM);
aic_outb(p, ((instr.integer >> 16) & 0xff), SEQRAM);
aic_outb(p, ((instr.integer >> 24) & 0xff), SEQRAM);
udelay(10);
break;
default:
panic("aic7xxx: Unknown opcode encountered in sequencer program.");
break;
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_loadseq
*
* Description:
* Load the sequencer code into the controller memory.
*-F*************************************************************************/
static void
aic7xxx_loadseq(struct aic7xxx_host *p)
{
struct sequencer_patch *cur_patch;
int i;
int downloaded;
int skip_addr;
unsigned char download_consts[4] = {0, 0, 0, 0};
if (aic7xxx_verbose & VERBOSE_PROBE)
{
printk(KERN_INFO "(scsi%d) Downloading sequencer code...", p->host_no);
}
#if 0
download_consts[TMODE_NUMCMDS] = p->num_targetcmds;
#endif
download_consts[TMODE_NUMCMDS] = 0;
cur_patch = &sequencer_patches[0];
downloaded = 0;
skip_addr = 0;
aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL);
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
for (i = 0; i < sizeof(seqprog) / 4; i++)
{
if (aic7xxx_check_patch(p, &cur_patch, i, &skip_addr) == 0)
{
/* Skip this instruction for this configuration. */
continue;
}
aic7xxx_download_instr(p, i, &download_consts[0]);
downloaded++;
}
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
aic_outb(p, FASTMODE | FAILDIS, SEQCTL);
unpause_sequencer(p, TRUE);
mdelay(1);
pause_sequencer(p);
aic_outb(p, FASTMODE, SEQCTL);
if (aic7xxx_verbose & VERBOSE_PROBE)
{
printk(" %d instructions downloaded\n", downloaded);
}
if (aic7xxx_dump_sequencer)
aic7xxx_print_sequencer(p, downloaded);
}
/*+F*************************************************************************
* Function:
* aic7xxx_print_sequencer
*
* Description:
* Print the contents of the sequencer memory to the screen.
*-F*************************************************************************/
static void
aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded)
{
int i, k, temp;
aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL);
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
k = 0;
for (i=0; i < downloaded; i++)
{
if ( k == 0 )
printk("%03x: ", i);
temp = aic_inb(p, SEQRAM);
temp |= (aic_inb(p, SEQRAM) << 8);
temp |= (aic_inb(p, SEQRAM) << 16);
temp |= (aic_inb(p, SEQRAM) << 24);
printk("%08x", temp);
if ( ++k == 8 )
{
printk("\n");
k = 0;
}
else
printk(" ");
}
aic_outb(p, 0, SEQADDR0);
aic_outb(p, 0, SEQADDR1);
aic_outb(p, FASTMODE | FAILDIS, SEQCTL);
unpause_sequencer(p, TRUE);
mdelay(1);
pause_sequencer(p);
aic_outb(p, FASTMODE, SEQCTL);
printk("\n");
}
/*+F*************************************************************************
* Function:
* aic7xxx_info
*
* Description:
* Return a string describing the driver.
*-F*************************************************************************/
static const char *
aic7xxx_info(struct Scsi_Host *dooh)
{
static char buffer[256];
char *bp;
struct aic7xxx_host *p;
bp = &buffer[0];
p = (struct aic7xxx_host *)dooh->hostdata;
memset(bp, 0, sizeof(buffer));
strcpy(bp, "Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) ");
strcat(bp, AIC7XXX_C_VERSION);
strcat(bp, "/");
strcat(bp, AIC7XXX_H_VERSION);
strcat(bp, "\n");
strcat(bp, " <");
strcat(bp, board_names[p->board_name_index]);
strcat(bp, ">");
return(bp);
}
/*+F*************************************************************************
* Function:
* aic7xxx_find_syncrate
*
* Description:
* Look up the valid period to SCSIRATE conversion in our table
*-F*************************************************************************/
static struct aic7xxx_syncrate *
aic7xxx_find_syncrate(struct aic7xxx_host *p, unsigned int *period,
unsigned int maxsync, unsigned char *options)
{
struct aic7xxx_syncrate *syncrate;
int done = FALSE;
switch(*options)
{
case MSG_EXT_PPR_OPTION_DT_CRC:
case MSG_EXT_PPR_OPTION_DT_UNITS:
if(!(p->features & AHC_ULTRA3))
{
*options = 0;
maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2);
}
break;
case MSG_EXT_PPR_OPTION_DT_CRC_QUICK:
case MSG_EXT_PPR_OPTION_DT_UNITS_QUICK:
if(!(p->features & AHC_ULTRA3))
{
*options = 0;
maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2);
}
else
{
/*
* we don't support the Quick Arbitration variants of dual edge
* clocking. As it turns out, we want to send back the
* same basic option, but without the QA attribute.
* We know that we are responding because we would never set
* these options ourself, we would only respond to them.
*/
switch(*options)
{
case MSG_EXT_PPR_OPTION_DT_CRC_QUICK:
*options = MSG_EXT_PPR_OPTION_DT_CRC;
break;
case MSG_EXT_PPR_OPTION_DT_UNITS_QUICK:
*options = MSG_EXT_PPR_OPTION_DT_UNITS;
break;
}
}
break;
default:
*options = 0;
maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2);
break;
}
syncrate = &aic7xxx_syncrates[maxsync];
while ( (syncrate->rate[0] != NULL) &&
(!(p->features & AHC_ULTRA2) || syncrate->sxfr_ultra2) )
{
if (*period <= syncrate->period)
{
switch(*options)
{
case MSG_EXT_PPR_OPTION_DT_CRC:
case MSG_EXT_PPR_OPTION_DT_UNITS:
if(!(syncrate->sxfr_ultra2 & AHC_SYNCRATE_CRC))
{
done = TRUE;
/*
* oops, we went too low for the CRC/DualEdge signalling, so
* clear the options byte
*/
*options = 0;
/*
* We'll be sending a reply to this packet to set the options
* properly, so unilaterally set the period as well.
*/
*period = syncrate->period;
}
else
{
done = TRUE;
if(syncrate == &aic7xxx_syncrates[maxsync])
{
*period = syncrate->period;
}
}
break;
default:
if(!(syncrate->sxfr_ultra2 & AHC_SYNCRATE_CRC))
{
done = TRUE;
if(syncrate == &aic7xxx_syncrates[maxsync])
{
*period = syncrate->period;
}
}
break;
}
if(done)
{
break;
}
}
syncrate++;
}
if ( (*period == 0) || (syncrate->rate[0] == NULL) ||
((p->features & AHC_ULTRA2) && (syncrate->sxfr_ultra2 == 0)) )
{
/*
* Use async transfers for this target
*/
*options = 0;
*period = 255;
syncrate = NULL;
}
return (syncrate);
}
/*+F*************************************************************************
* Function:
* aic7xxx_find_period
*
* Description:
* Look up the valid SCSIRATE to period conversion in our table
*-F*************************************************************************/
static unsigned int
aic7xxx_find_period(struct aic7xxx_host *p, unsigned int scsirate,
unsigned int maxsync)
{
struct aic7xxx_syncrate *syncrate;
if (p->features & AHC_ULTRA2)
{
scsirate &= SXFR_ULTRA2;
}
else
{
scsirate &= SXFR;
}
syncrate = &aic7xxx_syncrates[maxsync];
while (syncrate->rate[0] != NULL)
{
if (p->features & AHC_ULTRA2)
{
if (syncrate->sxfr_ultra2 == 0)
break;
else if (scsirate == syncrate->sxfr_ultra2)
return (syncrate->period);
else if (scsirate == (syncrate->sxfr_ultra2 & ~AHC_SYNCRATE_CRC))
return (syncrate->period);
}
else if (scsirate == (syncrate->sxfr & ~ULTRA_SXFR))
{
return (syncrate->period);
}
syncrate++;
}
return (0); /* async */
}
/*+F*************************************************************************
* Function:
* aic7xxx_validate_offset
*
* Description:
* Set a valid offset value for a particular card in use and transfer
* settings in use.
*-F*************************************************************************/
static void
aic7xxx_validate_offset(struct aic7xxx_host *p,
struct aic7xxx_syncrate *syncrate, unsigned int *offset, int wide)
{
unsigned int maxoffset;
/* Limit offset to what the card (and device) can do */
if (syncrate == NULL)
{
maxoffset = 0;
}
else if (p->features & AHC_ULTRA2)
{
maxoffset = MAX_OFFSET_ULTRA2;
}
else
{
if (wide)
maxoffset = MAX_OFFSET_16BIT;
else
maxoffset = MAX_OFFSET_8BIT;
}
*offset = min(*offset, maxoffset);
}
/*+F*************************************************************************
* Function:
* aic7xxx_set_syncrate
*
* Description:
* Set the actual syncrate down in the card and in our host structs
*-F*************************************************************************/
static void
aic7xxx_set_syncrate(struct aic7xxx_host *p, struct aic7xxx_syncrate *syncrate,
int target, int channel, unsigned int period, unsigned int offset,
unsigned char options, unsigned int type, struct aic_dev_data *aic_dev)
{
unsigned char tindex;
unsigned short target_mask;
unsigned char lun, old_options;
unsigned int old_period, old_offset;
tindex = target | (channel << 3);
target_mask = 0x01 << tindex;
lun = aic_inb(p, SCB_TCL) & 0x07;
if (syncrate == NULL)
{
period = 0;
offset = 0;
}
old_period = aic_dev->cur.period;
old_offset = aic_dev->cur.offset;
old_options = aic_dev->cur.options;
if (type & AHC_TRANS_CUR)
{
unsigned int scsirate;
scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
if (p->features & AHC_ULTRA2)
{
scsirate &= ~SXFR_ULTRA2;
if (syncrate != NULL)
{
switch(options)
{
case MSG_EXT_PPR_OPTION_DT_UNITS:
/*
* mask off the CRC bit in the xfer settings
*/
scsirate |= (syncrate->sxfr_ultra2 & ~AHC_SYNCRATE_CRC);
break;
default:
scsirate |= syncrate->sxfr_ultra2;
break;
}
}
if (type & AHC_TRANS_ACTIVE)
{
aic_outb(p, offset, SCSIOFFSET);
}
aic_outb(p, offset, TARG_OFFSET + tindex);
}
else /* Not an Ultra2 controller */
{
scsirate &= ~(SXFR|SOFS);
p->ultraenb &= ~target_mask;
if (syncrate != NULL)
{
if (syncrate->sxfr & ULTRA_SXFR)
{
p->ultraenb |= target_mask;
}
scsirate |= (syncrate->sxfr & SXFR);
scsirate |= (offset & SOFS);
}
if (type & AHC_TRANS_ACTIVE)
{
unsigned char sxfrctl0;
sxfrctl0 = aic_inb(p, SXFRCTL0);
sxfrctl0 &= ~FAST20;
if (p->ultraenb & target_mask)
sxfrctl0 |= FAST20;
aic_outb(p, sxfrctl0, SXFRCTL0);
}
aic_outb(p, p->ultraenb & 0xff, ULTRA_ENB);
aic_outb(p, (p->ultraenb >> 8) & 0xff, ULTRA_ENB + 1 );
}
if (type & AHC_TRANS_ACTIVE)
{
aic_outb(p, scsirate, SCSIRATE);
}
aic_outb(p, scsirate, TARG_SCSIRATE + tindex);
aic_dev->cur.period = period;
aic_dev->cur.offset = offset;
aic_dev->cur.options = options;
if ( !(type & AHC_TRANS_QUITE) &&
(aic7xxx_verbose & VERBOSE_NEGOTIATION) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
if (offset)
{
int rate_mod = (scsirate & WIDEXFER) ? 1 : 0;
printk(INFO_LEAD "Synchronous at %s Mbyte/sec, "
"offset %d.\n", p->host_no, channel, target, lun,
syncrate->rate[rate_mod], offset);
}
else
{
printk(INFO_LEAD "Using asynchronous transfers.\n",
p->host_no, channel, target, lun);
}
aic_dev->flags &= ~DEVICE_PRINT_DTR;
}
}
if (type & AHC_TRANS_GOAL)
{
aic_dev->goal.period = period;
aic_dev->goal.offset = offset;
aic_dev->goal.options = options;
}
if (type & AHC_TRANS_USER)
{
p->user[tindex].period = period;
p->user[tindex].offset = offset;
p->user[tindex].options = options;
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_set_width
*
* Description:
* Set the actual width down in the card and in our host structs
*-F*************************************************************************/
static void
aic7xxx_set_width(struct aic7xxx_host *p, int target, int channel, int lun,
unsigned int width, unsigned int type, struct aic_dev_data *aic_dev)
{
unsigned char tindex;
unsigned short target_mask;
unsigned int old_width;
tindex = target | (channel << 3);
target_mask = 1 << tindex;
old_width = aic_dev->cur.width;
if (type & AHC_TRANS_CUR)
{
unsigned char scsirate;
scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
scsirate &= ~WIDEXFER;
if (width == MSG_EXT_WDTR_BUS_16_BIT)
scsirate |= WIDEXFER;
aic_outb(p, scsirate, TARG_SCSIRATE + tindex);
if (type & AHC_TRANS_ACTIVE)
aic_outb(p, scsirate, SCSIRATE);
aic_dev->cur.width = width;
if ( !(type & AHC_TRANS_QUITE) &&
(aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
printk(INFO_LEAD "Using %s transfers\n", p->host_no, channel, target,
lun, (scsirate & WIDEXFER) ? "Wide(16bit)" : "Narrow(8bit)" );
}
}
if (type & AHC_TRANS_GOAL)
aic_dev->goal.width = width;
if (type & AHC_TRANS_USER)
p->user[tindex].width = width;
if (aic_dev->goal.offset)
{
if (p->features & AHC_ULTRA2)
{
aic_dev->goal.offset = MAX_OFFSET_ULTRA2;
}
else if (width == MSG_EXT_WDTR_BUS_16_BIT)
{
aic_dev->goal.offset = MAX_OFFSET_16BIT;
}
else
{
aic_dev->goal.offset = MAX_OFFSET_8BIT;
}
}
}
/*+F*************************************************************************
* Function:
* scbq_init
*
* Description:
* SCB queue initialization.
*
*-F*************************************************************************/
static void
scbq_init(volatile scb_queue_type *queue)
{
queue->head = NULL;
queue->tail = NULL;
}
/*+F*************************************************************************
* Function:
* scbq_insert_head
*
* Description:
* Add an SCB to the head of the list.
*
*-F*************************************************************************/
static inline void
scbq_insert_head(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
{
scb->q_next = queue->head;
queue->head = scb;
if (queue->tail == NULL) /* If list was empty, update tail. */
queue->tail = queue->head;
}
/*+F*************************************************************************
* Function:
* scbq_remove_head
*
* Description:
* Remove an SCB from the head of the list.
*
*-F*************************************************************************/
static inline struct aic7xxx_scb *
scbq_remove_head(volatile scb_queue_type *queue)
{
struct aic7xxx_scb * scbp;
scbp = queue->head;
if (queue->head != NULL)
queue->head = queue->head->q_next;
if (queue->head == NULL) /* If list is now empty, update tail. */
queue->tail = NULL;
return(scbp);
}
/*+F*************************************************************************
* Function:
* scbq_remove
*
* Description:
* Removes an SCB from the list.
*
*-F*************************************************************************/
static inline void
scbq_remove(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
{
if (queue->head == scb)
{
/* At beginning of queue, remove from head. */
scbq_remove_head(queue);
}
else
{
struct aic7xxx_scb *curscb = queue->head;
/*
* Search until the next scb is the one we're looking for, or
* we run out of queue.
*/
while ((curscb != NULL) && (curscb->q_next != scb))
{
curscb = curscb->q_next;
}
if (curscb != NULL)
{
/* Found it. */
curscb->q_next = scb->q_next;
if (scb->q_next == NULL)
{
/* Update the tail when removing the tail. */
queue->tail = curscb;
}
}
}
}
/*+F*************************************************************************
* Function:
* scbq_insert_tail
*
* Description:
* Add an SCB at the tail of the list.
*
*-F*************************************************************************/
static inline void
scbq_insert_tail(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
{
scb->q_next = NULL;
if (queue->tail != NULL) /* Add the scb at the end of the list. */
queue->tail->q_next = scb;
queue->tail = scb; /* Update the tail. */
if (queue->head == NULL) /* If list was empty, update head. */
queue->head = queue->tail;
}
/*+F*************************************************************************
* Function:
* aic7xxx_match_scb
*
* Description:
* Checks to see if an scb matches the target/channel as specified.
* If target is ALL_TARGETS (-1), then we're looking for any device
* on the specified channel; this happens when a channel is going
* to be reset and all devices on that channel must be aborted.
*-F*************************************************************************/
static int
aic7xxx_match_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb,
int target, int channel, int lun, unsigned char tag)
{
int targ = (scb->hscb->target_channel_lun >> 4) & 0x0F;
int chan = (scb->hscb->target_channel_lun >> 3) & 0x01;
int slun = scb->hscb->target_channel_lun & 0x07;
int match;
match = ((chan == channel) || (channel == ALL_CHANNELS));
if (match != 0)
match = ((targ == target) || (target == ALL_TARGETS));
if (match != 0)
match = ((lun == slun) || (lun == ALL_LUNS));
if (match != 0)
match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
return (match);
}
/*+F*************************************************************************
* Function:
* aic7xxx_add_curscb_to_free_list
*
* Description:
* Adds the current scb (in SCBPTR) to the list of free SCBs.
*-F*************************************************************************/
static void
aic7xxx_add_curscb_to_free_list(struct aic7xxx_host *p)
{
/*
* Invalidate the tag so that aic7xxx_find_scb doesn't think
* it's active
*/
aic_outb(p, SCB_LIST_NULL, SCB_TAG);
aic_outb(p, 0, SCB_CONTROL);
aic_outb(p, aic_inb(p, FREE_SCBH), SCB_NEXT);
aic_outb(p, aic_inb(p, SCBPTR), FREE_SCBH);
}
/*+F*************************************************************************
* Function:
* aic7xxx_rem_scb_from_disc_list
*
* Description:
* Removes the current SCB from the disconnected list and adds it
* to the free list.
*-F*************************************************************************/
static unsigned char
aic7xxx_rem_scb_from_disc_list(struct aic7xxx_host *p, unsigned char scbptr,
unsigned char prev)
{
unsigned char next;
aic_outb(p, scbptr, SCBPTR);
next = aic_inb(p, SCB_NEXT);
aic7xxx_add_curscb_to_free_list(p);
if (prev != SCB_LIST_NULL)
{
aic_outb(p, prev, SCBPTR);
aic_outb(p, next, SCB_NEXT);
}
else
{
aic_outb(p, next, DISCONNECTED_SCBH);
}
return next;
}
/*+F*************************************************************************
* Function:
* aic7xxx_busy_target
*
* Description:
* Set the specified target busy.
*-F*************************************************************************/
static inline void
aic7xxx_busy_target(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
p->untagged_scbs[scb->hscb->target_channel_lun] = scb->hscb->tag;
}
/*+F*************************************************************************
* Function:
* aic7xxx_index_busy_target
*
* Description:
* Returns the index of the busy target, and optionally sets the
* target inactive.
*-F*************************************************************************/
static inline unsigned char
aic7xxx_index_busy_target(struct aic7xxx_host *p, unsigned char tcl,
int unbusy)
{
unsigned char busy_scbid;
busy_scbid = p->untagged_scbs[tcl];
if (unbusy)
{
p->untagged_scbs[tcl] = SCB_LIST_NULL;
}
return (busy_scbid);
}
/*+F*************************************************************************
* Function:
* aic7xxx_find_scb
*
* Description:
* Look through the SCB array of the card and attempt to find the
* hardware SCB that corresponds to the passed in SCB. Return
* SCB_LIST_NULL if unsuccessful. This routine assumes that the
* card is already paused.
*-F*************************************************************************/
static unsigned char
aic7xxx_find_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
unsigned char saved_scbptr;
unsigned char curindex;
saved_scbptr = aic_inb(p, SCBPTR);
curindex = 0;
for (curindex = 0; curindex < p->scb_data->maxhscbs; curindex++)
{
aic_outb(p, curindex, SCBPTR);
if (aic_inb(p, SCB_TAG) == scb->hscb->tag)
{
break;
}
}
aic_outb(p, saved_scbptr, SCBPTR);
if (curindex >= p->scb_data->maxhscbs)
{
curindex = SCB_LIST_NULL;
}
return (curindex);
}
/*+F*************************************************************************
* Function:
* aic7xxx_allocate_scb
*
* Description:
* Get an SCB from the free list or by allocating a new one.
*-F*************************************************************************/
static int
aic7xxx_allocate_scb(struct aic7xxx_host *p)
{
struct aic7xxx_scb *scbp = NULL;
int scb_size = (sizeof (struct hw_scatterlist) * AIC7XXX_MAX_SG) + 12 + 6;
int i;
int step = PAGE_SIZE / 1024;
unsigned long scb_count = 0;
struct hw_scatterlist *hsgp;
struct aic7xxx_scb *scb_ap;
struct aic7xxx_scb_dma *scb_dma;
unsigned char *bufs;
if (p->scb_data->numscbs < p->scb_data->maxscbs)
{
/*
* Calculate the optimal number of SCBs to allocate.
*
* NOTE: This formula works because the sizeof(sg_array) is always
* 1024. Therefore, scb_size * i would always be > PAGE_SIZE *
* (i/step). The (i-1) allows the left hand side of the equation
* to grow into the right hand side to a point of near perfect
* efficiency since scb_size * (i -1) is growing slightly faster
* than the right hand side. If the number of SG array elements
* is changed, this function may not be near so efficient any more.
*
* Since the DMA'able buffers are now allocated in a separate
* chunk this algorithm has been modified to match. The '12'
* and '6' factors in scb_size are for the DMA'able command byte
* and sensebuffers respectively. -DaveM
*/
for ( i=step;; i *= 2 )
{
if ( (scb_size * (i-1)) >= ( (PAGE_SIZE * (i/step)) - 64 ) )
{
i /= 2;
break;
}
}
scb_count = min( (i-1), p->scb_data->maxscbs - p->scb_data->numscbs);
scb_ap = kmalloc(sizeof (struct aic7xxx_scb) * scb_count
+ sizeof(struct aic7xxx_scb_dma), GFP_ATOMIC);
if (scb_ap == NULL)
return(0);
scb_dma = (struct aic7xxx_scb_dma *)&scb_ap[scb_count];
hsgp = (struct hw_scatterlist *)
pci_alloc_consistent(p->pdev, scb_size * scb_count,
&scb_dma->dma_address);
if (hsgp == NULL)
{
kfree(scb_ap);
return(0);
}
bufs = (unsigned char *)&hsgp[scb_count * AIC7XXX_MAX_SG];
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
{
if (p->scb_data->numscbs == 0)
printk(INFO_LEAD "Allocating initial %ld SCB structures.\n",
p->host_no, -1, -1, -1, scb_count);
else
printk(INFO_LEAD "Allocating %ld additional SCB structures.\n",
p->host_no, -1, -1, -1, scb_count);
}
#endif
memset(scb_ap, 0, sizeof (struct aic7xxx_scb) * scb_count);
scb_dma->dma_offset = (unsigned long)scb_dma->dma_address
- (unsigned long)hsgp;
scb_dma->dma_len = scb_size * scb_count;
for (i=0; i < scb_count; i++)
{
scbp = &scb_ap[i];
scbp->hscb = &p->scb_data->hscbs[p->scb_data->numscbs];
scbp->sg_list = &hsgp[i * AIC7XXX_MAX_SG];
scbp->sense_cmd = bufs;
scbp->cmnd = bufs + 6;
bufs += 12 + 6;
scbp->scb_dma = scb_dma;
memset(scbp->hscb, 0, sizeof(struct aic7xxx_hwscb));
scbp->hscb->tag = p->scb_data->numscbs;
/*
* Place in the scb array; never is removed
*/
p->scb_data->scb_array[p->scb_data->numscbs++] = scbp;
scbq_insert_tail(&p->scb_data->free_scbs, scbp);
}
scbp->kmalloc_ptr = scb_ap;
}
return(scb_count);
}
/*+F*************************************************************************
* Function:
* aic7xxx_queue_cmd_complete
*
* Description:
* Due to race conditions present in the SCSI subsystem, it is easier
* to queue completed commands, then call scsi_done() on them when
* we're finished. This function queues the completed commands.
*-F*************************************************************************/
static void
aic7xxx_queue_cmd_complete(struct aic7xxx_host *p, struct scsi_cmnd *cmd)
{
aic7xxx_position(cmd) = SCB_LIST_NULL;
cmd->host_scribble = (char *)p->completeq.head;
p->completeq.head = cmd;
}
/*+F*************************************************************************
* Function:
* aic7xxx_done_cmds_complete
*
* Description:
* Process the completed command queue.
*-F*************************************************************************/
static void aic7xxx_done_cmds_complete(struct aic7xxx_host *p)
{
struct scsi_cmnd *cmd;
while (p->completeq.head != NULL) {
cmd = p->completeq.head;
p->completeq.head = (struct scsi_cmnd *) cmd->host_scribble;
cmd->host_scribble = NULL;
cmd->scsi_done(cmd);
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_free_scb
*
* Description:
* Free the scb and insert into the free scb list.
*-F*************************************************************************/
static void
aic7xxx_free_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
scb->flags = SCB_FREE;
scb->cmd = NULL;
scb->sg_count = 0;
scb->sg_length = 0;
scb->tag_action = 0;
scb->hscb->control = 0;
scb->hscb->target_status = 0;
scb->hscb->target_channel_lun = SCB_LIST_NULL;
scbq_insert_head(&p->scb_data->free_scbs, scb);
}
/*+F*************************************************************************
* Function:
* aic7xxx_done
*
* Description:
* Calls the higher level scsi done function and frees the scb.
*-F*************************************************************************/
static void
aic7xxx_done(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
struct scsi_cmnd *cmd = scb->cmd;
struct aic_dev_data *aic_dev = cmd->device->hostdata;
int tindex = TARGET_INDEX(cmd);
struct aic7xxx_scb *scbp;
unsigned char queue_depth;
scsi_dma_unmap(cmd);
if (scb->flags & SCB_SENSE)
{
pci_unmap_single(p->pdev,
le32_to_cpu(scb->sg_list[0].address),
SCSI_SENSE_BUFFERSIZE,
PCI_DMA_FROMDEVICE);
}
if (scb->flags & SCB_RECOVERY_SCB)
{
p->flags &= ~AHC_ABORT_PENDING;
}
if (scb->flags & (SCB_RESET|SCB_ABORT))
{
cmd->result |= (DID_RESET << 16);
}
if ((scb->flags & SCB_MSGOUT_BITS) != 0)
{
unsigned short mask;
int message_error = FALSE;
mask = 0x01 << tindex;
/*
* Check to see if we get an invalid message or a message error
* after failing to negotiate a wide or sync transfer message.
*/
if ((scb->flags & SCB_SENSE) &&
((scb->cmd->sense_buffer[12] == 0x43) || /* INVALID_MESSAGE */
(scb->cmd->sense_buffer[12] == 0x49))) /* MESSAGE_ERROR */
{
message_error = TRUE;
}
if (scb->flags & SCB_MSGOUT_WDTR)
{
if (message_error)
{
if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
printk(INFO_LEAD "Device failed to complete Wide Negotiation "
"processing and\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "returned a sense error code for invalid message, "
"disabling future\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "Wide negotiation to this device.\n", p->host_no,
CTL_OF_SCB(scb));
}
aic_dev->needwdtr = aic_dev->needwdtr_copy = 0;
}
}
if (scb->flags & SCB_MSGOUT_SDTR)
{
if (message_error)
{
if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
printk(INFO_LEAD "Device failed to complete Sync Negotiation "
"processing and\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "returned a sense error code for invalid message, "
"disabling future\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "Sync negotiation to this device.\n", p->host_no,
CTL_OF_SCB(scb));
aic_dev->flags &= ~DEVICE_PRINT_DTR;
}
aic_dev->needsdtr = aic_dev->needsdtr_copy = 0;
}
}
if (scb->flags & SCB_MSGOUT_PPR)
{
if(message_error)
{
if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
(aic_dev->flags & DEVICE_PRINT_DTR) )
{
printk(INFO_LEAD "Device failed to complete Parallel Protocol "
"Request processing and\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "returned a sense error code for invalid message, "
"disabling future\n", p->host_no, CTL_OF_SCB(scb));
printk(INFO_LEAD "Parallel Protocol Request negotiation to this "
"device.\n", p->host_no, CTL_OF_SCB(scb));
}
/*
* Disable PPR negotiation and revert back to WDTR and SDTR setup
*/
aic_dev->needppr = aic_dev->needppr_copy = 0;
aic_dev->needsdtr = aic_dev->needsdtr_copy = 1;
aic_dev->needwdtr = aic_dev->needwdtr_copy = 1;
}
}
}
queue_depth = aic_dev->temp_q_depth;
if (queue_depth >= aic_dev->active_cmds)
{
scbp = scbq_remove_head(&aic_dev->delayed_scbs);
if (scbp)
{
if (queue_depth == 1)
{
/*
* Give extra preference to untagged devices, such as CD-R devices
* This makes it more likely that a drive *won't* stuff up while
* waiting on data at a critical time, such as CD-R writing and
* audio CD ripping operations. Should also benefit tape drives.
*/
scbq_insert_head(&p->waiting_scbs, scbp);
}
else
{
scbq_insert_tail(&p->waiting_scbs, scbp);
}
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
printk(INFO_LEAD "Moving SCB from delayed to waiting queue.\n",
p->host_no, CTL_OF_SCB(scbp));
#endif
if (queue_depth > aic_dev->active_cmds)
{
scbp = scbq_remove_head(&aic_dev->delayed_scbs);
if (scbp)
scbq_insert_tail(&p->waiting_scbs, scbp);
}
}
}
if (!(scb->tag_action))
{
aic7xxx_index_busy_target(p, scb->hscb->target_channel_lun,
/* unbusy */ TRUE);
if (cmd->device->simple_tags)
{
aic_dev->temp_q_depth = aic_dev->max_q_depth;
}
}
if(scb->flags & SCB_DTR_SCB)
{
aic_dev->dtr_pending = 0;
}
aic_dev->active_cmds--;
p->activescbs--;
if ((scb->sg_length >= 512) && (((cmd->result >> 16) & 0xf) == DID_OK))
{
long *ptr;
int x, i;
if (rq_data_dir(cmd->request) == WRITE)
{
aic_dev->w_total++;
ptr = aic_dev->w_bins;
}
else
{
aic_dev->r_total++;
ptr = aic_dev->r_bins;
}
x = scb->sg_length;
x >>= 10;
for(i=0; i<6; i++)
{
x >>= 2;
if(!x) {
ptr[i]++;
break;
}
}
if(i == 6 && x)
ptr[5]++;
}
aic7xxx_free_scb(p, scb);
aic7xxx_queue_cmd_complete(p, cmd);
}
/*+F*************************************************************************
* Function:
* aic7xxx_run_done_queue
*
* Description:
* Calls the aic7xxx_done() for the scsi_cmnd of each scb in the
* aborted list, and adds each scb to the free list. If complete
* is TRUE, we also process the commands complete list.
*-F*************************************************************************/
static void
aic7xxx_run_done_queue(struct aic7xxx_host *p, /*complete*/ int complete)
{
struct aic7xxx_scb *scb;
int i, found = 0;
for (i = 0; i < p->scb_data->numscbs; i++)
{
scb = p->scb_data->scb_array[i];
if (scb->flags & SCB_QUEUED_FOR_DONE)
{
if (scb->flags & SCB_QUEUE_FULL)
{
scb->cmd->result = QUEUE_FULL << 1;
}
else
{
if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
printk(INFO_LEAD "Aborting scb %d\n",
p->host_no, CTL_OF_SCB(scb), scb->hscb->tag);
/*
* Clear any residual information since the normal aic7xxx_done() path
* doesn't touch the residuals.
*/
scb->hscb->residual_SG_segment_count = 0;
scb->hscb->residual_data_count[0] = 0;
scb->hscb->residual_data_count[1] = 0;
scb->hscb->residual_data_count[2] = 0;
}
found++;
aic7xxx_done(p, scb);
}
}
if (aic7xxx_verbose & (VERBOSE_ABORT_RETURN | VERBOSE_RESET_RETURN))
{
printk(INFO_LEAD "%d commands found and queued for "
"completion.\n", p->host_no, -1, -1, -1, found);
}
if (complete)
{
aic7xxx_done_cmds_complete(p);
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_abort_waiting_scb
*
* Description:
* Manipulate the waiting for selection list and return the
* scb that follows the one that we remove.
*-F*************************************************************************/
static unsigned char
aic7xxx_abort_waiting_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb,
unsigned char scbpos, unsigned char prev)
{
unsigned char curscb, next;
/*
* Select the SCB we want to abort and pull the next pointer out of it.
*/
curscb = aic_inb(p, SCBPTR);
aic_outb(p, scbpos, SCBPTR);
next = aic_inb(p, SCB_NEXT);
aic7xxx_add_curscb_to_free_list(p);
/*
* Update the waiting list
*/
if (prev == SCB_LIST_NULL)
{
/*
* First in the list
*/
aic_outb(p, next, WAITING_SCBH);
}
else
{
/*
* Select the scb that pointed to us and update its next pointer.
*/
aic_outb(p, prev, SCBPTR);
aic_outb(p, next, SCB_NEXT);
}
/*
* Point us back at the original scb position and inform the SCSI
* system that the command has been aborted.
*/
aic_outb(p, curscb, SCBPTR);
return (next);
}
/*+F*************************************************************************
* Function:
* aic7xxx_search_qinfifo
*
* Description:
* Search the queue-in FIFO for matching SCBs and conditionally
* requeue. Returns the number of matching SCBs.
*-F*************************************************************************/
static int
aic7xxx_search_qinfifo(struct aic7xxx_host *p, int target, int channel,
int lun, unsigned char tag, int flags, int requeue,
volatile scb_queue_type *queue)
{
int found;
unsigned char qinpos, qintail;
struct aic7xxx_scb *scbp;
found = 0;
qinpos = aic_inb(p, QINPOS);
qintail = p->qinfifonext;
p->qinfifonext = qinpos;
while (qinpos != qintail)
{
scbp = p->scb_data->scb_array[p->qinfifo[qinpos++]];
if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
{
/*
* We found an scb that needs to be removed.
*/
if (requeue && (queue != NULL))
{
if (scbp->flags & SCB_WAITINGQ)
{
scbq_remove(queue, scbp);
scbq_remove(&p->waiting_scbs, scbp);
scbq_remove(&AIC_DEV(scbp->cmd)->delayed_scbs, scbp);
AIC_DEV(scbp->cmd)->active_cmds++;
p->activescbs++;
}
scbq_insert_tail(queue, scbp);
AIC_DEV(scbp->cmd)->active_cmds--;
p->activescbs--;
scbp->flags |= SCB_WAITINGQ;
if ( !(scbp->tag_action & TAG_ENB) )
{
aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
TRUE);
}
}
else if (requeue)
{
p->qinfifo[p->qinfifonext++] = scbp->hscb->tag;
}
else
{
/*
* Preserve any SCB_RECOVERY_SCB flags on this scb then set the
* flags we were called with, presumeably so aic7xxx_run_done_queue
* can find this scb
*/
scbp->flags = flags | (scbp->flags & SCB_RECOVERY_SCB);
if (aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
FALSE) == scbp->hscb->tag)
{
aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
TRUE);
}
}
found++;
}
else
{
p->qinfifo[p->qinfifonext++] = scbp->hscb->tag;
}
}
/*
* Now that we've done the work, clear out any left over commands in the
* qinfifo and update the KERNEL_QINPOS down on the card.
*
* NOTE: This routine expect the sequencer to already be paused when
* it is run....make sure it's that way!
*/
qinpos = p->qinfifonext;
while(qinpos != qintail)
{
p->qinfifo[qinpos++] = SCB_LIST_NULL;
}
if (p->features & AHC_QUEUE_REGS)
aic_outb(p, p->qinfifonext, HNSCB_QOFF);
else
aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
return (found);
}
/*+F*************************************************************************
* Function:
* aic7xxx_scb_on_qoutfifo
*
* Description:
* Is the scb that was passed to us currently on the qoutfifo?
*-F*************************************************************************/
static int
aic7xxx_scb_on_qoutfifo(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
int i=0;
while(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] != SCB_LIST_NULL)
{
if(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] == scb->hscb->tag)
return TRUE;
else
i++;
}
return FALSE;
}
/*+F*************************************************************************
* Function:
* aic7xxx_reset_device
*
* Description:
* The device at the given target/channel has been reset. Abort
* all active and queued scbs for that target/channel. This function
* need not worry about linked next pointers because if was a MSG_ABORT_TAG
* then we had a tagged command (no linked next), if it was MSG_ABORT or
* MSG_BUS_DEV_RESET then the device won't know about any commands any more
* and no busy commands will exist, and if it was a bus reset, then nothing
* knows about any linked next commands any more. In all cases, we don't
* need to worry about the linked next or busy scb, we just need to clear
* them.
*-F*************************************************************************/
static void
aic7xxx_reset_device(struct aic7xxx_host *p, int target, int channel,
int lun, unsigned char tag)
{
struct aic7xxx_scb *scbp, *prev_scbp;
struct scsi_device *sd;
unsigned char active_scb, tcl, scb_tag;
int i = 0, init_lists = FALSE;
struct aic_dev_data *aic_dev;
/*
* Restore this when we're done
*/
active_scb = aic_inb(p, SCBPTR);
scb_tag = aic_inb(p, SCB_TAG);
if (aic7xxx_verbose & (VERBOSE_RESET_PROCESS | VERBOSE_ABORT_PROCESS))
{
printk(INFO_LEAD "Reset device, hardware_scb %d,\n",
p->host_no, channel, target, lun, active_scb);
printk(INFO_LEAD "Current scb %d, SEQADDR 0x%x, LASTPHASE "
"0x%x\n",
p->host_no, channel, target, lun, scb_tag,
aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
aic_inb(p, LASTPHASE));
printk(INFO_LEAD "SG_CACHEPTR 0x%x, SG_COUNT %d, SCSISIGI 0x%x\n",
p->host_no, channel, target, lun,
(p->features & AHC_ULTRA2) ? aic_inb(p, SG_CACHEPTR) : 0,
aic_inb(p, SG_COUNT), aic_inb(p, SCSISIGI));
printk(INFO_LEAD "SSTAT0 0x%x, SSTAT1 0x%x, SSTAT2 0x%x\n",
p->host_no, channel, target, lun, aic_inb(p, SSTAT0),
aic_inb(p, SSTAT1), aic_inb(p, SSTAT2));
}
/*
* Deal with the busy target and linked next issues.
*/
list_for_each_entry(aic_dev, &p->aic_devs, list)
{
if (aic7xxx_verbose & (VERBOSE_RESET_PROCESS | VERBOSE_ABORT_PROCESS))
printk(INFO_LEAD "processing aic_dev %p\n", p->host_no, channel, target,
lun, aic_dev);
sd = aic_dev->SDptr;
if((target != ALL_TARGETS && target != sd->id) ||
(channel != ALL_CHANNELS && channel != sd->channel))
continue;
if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
printk(INFO_LEAD "Cleaning up status information "
"and delayed_scbs.\n", p->host_no, sd->channel, sd->id, sd->lun);
aic_dev->flags &= ~BUS_DEVICE_RESET_PENDING;
if ( tag == SCB_LIST_NULL )
{
aic_dev->dtr_pending = 0;
aic_dev->needppr = aic_dev->needppr_copy;
aic_dev->needsdtr = aic_dev->needsdtr_copy;
aic_dev->needwdtr = aic_dev->needwdtr_copy;
aic_dev->flags = DEVICE_PRINT_DTR;
aic_dev->temp_q_depth = aic_dev->max_q_depth;
}
tcl = (sd->id << 4) | (sd->channel << 3) | sd->lun;
if ( (aic7xxx_index_busy_target(p, tcl, FALSE) == tag) ||
(tag == SCB_LIST_NULL) )
aic7xxx_index_busy_target(p, tcl, /* unbusy */ TRUE);
prev_scbp = NULL;
scbp = aic_dev->delayed_scbs.head;
while (scbp != NULL)
{
prev_scbp = scbp;
scbp = scbp->q_next;
if (aic7xxx_match_scb(p, prev_scbp, target, channel, lun, tag))
{
scbq_remove(&aic_dev->delayed_scbs, prev_scbp);
if (prev_scbp->flags & SCB_WAITINGQ)
{
aic_dev->active_cmds++;
p->activescbs++;
}
prev_scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
prev_scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
}
}
}
if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
printk(INFO_LEAD "Cleaning QINFIFO.\n", p->host_no, channel, target, lun );
aic7xxx_search_qinfifo(p, target, channel, lun, tag,
SCB_RESET | SCB_QUEUED_FOR_DONE, /* requeue */ FALSE, NULL);
/*
* Search the waiting_scbs queue for matches, this catches any SCB_QUEUED
* ABORT/RESET commands.
*/
if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
printk(INFO_LEAD "Cleaning waiting_scbs.\n", p->host_no, channel,
target, lun );
{
struct aic7xxx_scb *scbp, *prev_scbp;
prev_scbp = NULL;
scbp = p->waiting_scbs.head;
while (scbp != NULL)
{
prev_scbp = scbp;
scbp = scbp->q_next;
if (aic7xxx_match_scb(p, prev_scbp, target, channel, lun, tag))
{
scbq_remove(&p->waiting_scbs, prev_scbp);
if (prev_scbp->flags & SCB_WAITINGQ)
{
AIC_DEV(prev_scbp->cmd)->active_cmds++;
p->activescbs++;
}
prev_scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
prev_scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
}
}
}
/*
* Search waiting for selection list.
*/
if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
printk(INFO_LEAD "Cleaning waiting for selection "
"list.\n", p->host_no, channel, target, lun);
{
unsigned char next, prev, scb_index;
next = aic_inb(p, WAITING_SCBH); /* Start at head of list. */
prev = SCB_LIST_NULL;
while (next != SCB_LIST_NULL)
{
aic_outb(p, next, SCBPTR);
scb_index = aic_inb(p, SCB_TAG);
if (scb_index >= p->scb_data->numscbs)
{
/*
* No aic7xxx_verbose check here.....we want to see this since it
* means either the kernel driver or the sequencer screwed things up
*/
printk(WARN_LEAD "Waiting List inconsistency; SCB index=%d, "
"numscbs=%d\n", p->host_no, channel, target, lun, scb_index,
p->scb_data->numscbs);
next = aic_inb(p, SCB_NEXT);
aic7xxx_add_curscb_to_free_list(p);
}
else
{
scbp = p->scb_data->scb_array[scb_index];
if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
{
next = aic7xxx_abort_waiting_scb(p, scbp, next, prev);
if (scbp->flags & SCB_WAITINGQ)
{
AIC_DEV(scbp->cmd)->active_cmds++;
p->activescbs++;
}
scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
if (prev == SCB_LIST_NULL)
{
/*
* This is either the first scb on the waiting list, or we
* have already yanked the first and haven't left any behind.
* Either way, we need to turn off the selection hardware if
* it isn't already off.
*/
aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ);
aic_outb(p, CLRSELTIMEO, CLRSINT1);
}
}
else
{
prev = next;
next = aic_inb(p, SCB_NEXT);
}
}
}
}
/*
* Go through disconnected list and remove any entries we have queued
* for completion, zeroing their control byte too.
*/
if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
printk(INFO_LEAD "Cleaning disconnected scbs "
"list.\n", p->host_no, channel, target, lun);
if (p->flags & AHC_PAGESCBS)
{
unsigned char next, prev, scb_index;
next = aic_inb(p, DISCONNECTED_SCBH);
prev = SCB_LIST_NULL;
while (next != SCB_LIST_NULL)
{
aic_outb(p, next, SCBPTR);
scb_index = aic_inb(p, SCB_TAG);
if (scb_index > p->scb_data->numscbs)
{
printk(WARN_LEAD "Disconnected List inconsistency; SCB index=%d, "
"numscbs=%d\n", p->host_no, channel, target, lun, scb_index,
p->scb_data->numscbs);
next = aic7xxx_rem_scb_from_disc_list(p, next, prev);
}
else
{
scbp = p->scb_data->scb_array[scb_index];
if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
{
next = aic7xxx_rem_scb_from_disc_list(p, next, prev);
if (scbp->flags & SCB_WAITINGQ)
{
AIC_DEV(scbp->cmd)->active_cmds++;
p->activescbs++;
}
scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
scbp->hscb->control = 0;
}
else
{
prev = next;
next = aic_inb(p, SCB_NEXT);
}
}
}
}
/*
* Walk the free list making sure no entries on the free list have
* a valid SCB_TAG value or SCB_CONTROL byte.
*/
if (p->flags & AHC_PAGESCBS)
{
unsigned char next;
next = aic_inb(p, FREE_SCBH);
while (next != SCB_LIST_NULL)
{
aic_outb(p, next, SCBPTR);
if (aic_inb(p, SCB_TAG) < p->scb_data->numscbs)
{
printk(WARN_LEAD "Free list inconsistency!.\n", p->host_no, channel,
target, lun);
init_lists = TRUE;
next = SCB_LIST_NULL;
}
else
{
aic_outb(p, SCB_LIST_NULL, SCB_TAG);
aic_outb(p, 0, SCB_CONTROL);
next = aic_inb(p, SCB_NEXT);
}
}
}
/*
* Go through the hardware SCB array looking for commands that
* were active but not on any list.
*/
if (init_lists)
{
aic_outb(p, SCB_LIST_NULL, FREE_SCBH);
aic_outb(p, SCB_LIST_NULL, WAITING_SCBH);
aic_outb(p, SCB_LIST_NULL, DISCONNECTED_SCBH);
}
for (i = p->scb_data->maxhscbs - 1; i >= 0; i--)
{
unsigned char scbid;
aic_outb(p, i, SCBPTR);
if (init_lists)
{
aic_outb(p, SCB_LIST_NULL, SCB_TAG);
aic_outb(p, SCB_LIST_NULL, SCB_NEXT);
aic_outb(p, 0, SCB_CONTROL);
aic7xxx_add_curscb_to_free_list(p);
}
else
{
scbid = aic_inb(p, SCB_TAG);
if (scbid < p->scb_data->numscbs)
{
scbp = p->scb_data->scb_array[scbid];
if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
{
aic_outb(p, 0, SCB_CONTROL);
aic_outb(p, SCB_LIST_NULL, SCB_TAG);
aic7xxx_add_curscb_to_free_list(p);
}
}
}
}
/*
* Go through the entire SCB array now and look for commands for
* for this target that are stillactive. These are other (most likely
* tagged) commands that were disconnected when the reset occurred.
* Any commands we find here we know this about, it wasn't on any queue,
* it wasn't in the qinfifo, it wasn't in the disconnected or waiting
* lists, so it really must have been a paged out SCB. In that case,
* we shouldn't need to bother with updating any counters, just mark
* the correct flags and go on.
*/
for (i = 0; i < p->scb_data->numscbs; i++)
{
scbp = p->scb_data->scb_array[i];
if ((scbp->flags & SCB_ACTIVE) &&
aic7xxx_match_scb(p, scbp, target, channel, lun, tag) &&
!aic7xxx_scb_on_qoutfifo(p, scbp))
{
if (scbp->flags & SCB_WAITINGQ)
{
scbq_remove(&p->waiting_scbs, scbp);
scbq_remove(&AIC_DEV(scbp->cmd)->delayed_scbs, scbp);
AIC_DEV(scbp->cmd)->active_cmds++;
p->activescbs++;
}
scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
}
}
aic_outb(p, active_scb, SCBPTR);
}
/*+F*************************************************************************
* Function:
* aic7xxx_clear_intstat
*
* Description:
* Clears the interrupt status.
*-F*************************************************************************/
static void
aic7xxx_clear_intstat(struct aic7xxx_host *p)
{
/* Clear any interrupt conditions this may have caused. */
aic_outb(p, CLRSELDO | CLRSELDI | CLRSELINGO, CLRSINT0);
aic_outb(p, CLRSELTIMEO | CLRATNO | CLRSCSIRSTI | CLRBUSFREE | CLRSCSIPERR |
CLRPHASECHG | CLRREQINIT, CLRSINT1);
aic_outb(p, CLRSCSIINT | CLRSEQINT | CLRBRKADRINT | CLRPARERR, CLRINT);
}
/*+F*************************************************************************
* Function:
* aic7xxx_reset_current_bus
*
* Description:
* Reset the current SCSI bus.
*-F*************************************************************************/
static void
aic7xxx_reset_current_bus(struct aic7xxx_host *p)
{
/* Disable reset interrupts. */
aic_outb(p, aic_inb(p, SIMODE1) & ~ENSCSIRST, SIMODE1);
/* Turn off the bus' current operations, after all, we shouldn't have any
* valid commands left to cause a RSELI and SELO once we've tossed the
* bus away with this reset, so we might as well shut down the sequencer
* until the bus is restarted as oppossed to saving the current settings
* and restoring them (which makes no sense to me). */
/* Turn on the bus reset. */
aic_outb(p, aic_inb(p, SCSISEQ) | SCSIRSTO, SCSISEQ);
while ( (aic_inb(p, SCSISEQ) & SCSIRSTO) == 0)
mdelay(5);
/*
* Some of the new Ultra2 chipsets need a longer delay after a chip
* reset than just the init setup creates, so we have to delay here
* before we go into a reset in order to make the chips happy.
*/
if (p->features & AHC_ULTRA2)
mdelay(250);
else
mdelay(50);
/* Turn off the bus reset. */
aic_outb(p, 0, SCSISEQ);
mdelay(10);
aic7xxx_clear_intstat(p);
/* Re-enable reset interrupts. */
aic_outb(p, aic_inb(p, SIMODE1) | ENSCSIRST, SIMODE1);
}
/*+F*************************************************************************
* Function:
* aic7xxx_reset_channel
*
* Description:
* Reset the channel.
*-F*************************************************************************/
static void
aic7xxx_reset_channel(struct aic7xxx_host *p, int channel, int initiate_reset)
{
unsigned long offset_min, offset_max;
unsigned char sblkctl;
int cur_channel;
if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
printk(INFO_LEAD "Reset channel called, %s initiate reset.\n",
p->host_no, channel, -1, -1, (initiate_reset==TRUE) ? "will" : "won't" );
if (channel == 1)
{
offset_min = 8;
offset_max = 16;
}
else
{
if (p->features & AHC_TWIN)
{
/* Channel A */
offset_min = 0;
offset_max = 8;
}
else
{
offset_min = 0;
if (p->features & AHC_WIDE)
{
offset_max = 16;
}
else
{
offset_max = 8;
}
}
}
while (offset_min < offset_max)
{
/*
* Revert to async/narrow transfers until we renegotiate.
*/
aic_outb(p, 0, TARG_SCSIRATE + offset_min);
if (p->features & AHC_ULTRA2)
{
aic_outb(p, 0, TARG_OFFSET + offset_min);
}
offset_min++;
}
/*
* Reset the bus and unpause/restart the controller
*/
sblkctl = aic_inb(p, SBLKCTL);
if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
cur_channel = (sblkctl & SELBUSB) >> 3;
else
cur_channel = 0;
if ( (cur_channel != channel) && (p->features & AHC_TWIN) )
{
/*
* Case 1: Command for another bus is active
*/
if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
printk(INFO_LEAD "Stealthily resetting idle channel.\n", p->host_no,
channel, -1, -1);
/*
* Stealthily reset the other bus without upsetting the current bus.
*/
aic_outb(p, sblkctl ^ SELBUSB, SBLKCTL);
aic_outb(p, aic_inb(p, SIMODE1) & ~ENBUSFREE, SIMODE1);
if (initiate_reset)
{
aic7xxx_reset_current_bus(p);
}
aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), SCSISEQ);
aic7xxx_clear_intstat(p);
aic_outb(p, sblkctl, SBLKCTL);
}
else
{
/*
* Case 2: A command from this bus is active or we're idle.
*/
if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
printk(INFO_LEAD "Resetting currently active channel.\n", p->host_no,
channel, -1, -1);
aic_outb(p, aic_inb(p, SIMODE1) & ~(ENBUSFREE|ENREQINIT),
SIMODE1);
p->flags &= ~AHC_HANDLING_REQINITS;
p->msg_type = MSG_TYPE_NONE;
p->msg_len = 0;
if (initiate_reset)
{
aic7xxx_reset_current_bus(p);
}
aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), SCSISEQ);
aic7xxx_clear_intstat(p);
}
if (aic7xxx_verbose & VERBOSE_RESET_RETURN)
printk(INFO_LEAD "Channel reset\n", p->host_no, channel, -1, -1);
/*
* Clean up all the state information for the pending transactions
* on this bus.
*/
aic7xxx_reset_device(p, ALL_TARGETS, channel, ALL_LUNS, SCB_LIST_NULL);
if ( !(p->features & AHC_TWIN) )
{
restart_sequencer(p);
}
return;
}
/*+F*************************************************************************
* Function:
* aic7xxx_run_waiting_queues
*
* Description:
* Scan the awaiting_scbs queue downloading and starting as many
* scbs as we can.
*-F*************************************************************************/
static void
aic7xxx_run_waiting_queues(struct aic7xxx_host *p)
{
struct aic7xxx_scb *scb;
struct aic_dev_data *aic_dev;
int sent;
if (p->waiting_scbs.head == NULL)
return;
sent = 0;
/*
* First handle SCBs that are waiting but have been assigned a slot.
*/
while ((scb = scbq_remove_head(&p->waiting_scbs)) != NULL)
{
aic_dev = scb->cmd->device->hostdata;
if ( !scb->tag_action )
{
aic_dev->temp_q_depth = 1;
}
if ( aic_dev->active_cmds >= aic_dev->temp_q_depth)
{
scbq_insert_tail(&aic_dev->delayed_scbs, scb);
}
else
{
scb->flags &= ~SCB_WAITINGQ;
aic_dev->active_cmds++;
p->activescbs++;
if ( !(scb->tag_action) )
{
aic7xxx_busy_target(p, scb);
}
p->qinfifo[p->qinfifonext++] = scb->hscb->tag;
sent++;
}
}
if (sent)
{
if (p->features & AHC_QUEUE_REGS)
aic_outb(p, p->qinfifonext, HNSCB_QOFF);
else
{
pause_sequencer(p);
aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
unpause_sequencer(p, FALSE);
}
if (p->activescbs > p->max_activescbs)
p->max_activescbs = p->activescbs;
}
}
#ifdef CONFIG_PCI
#define DPE 0x80
#define SSE 0x40
#define RMA 0x20
#define RTA 0x10
#define STA 0x08
#define DPR 0x01
/*+F*************************************************************************
* Function:
* aic7xxx_pci_intr
*
* Description:
* Check the scsi card for PCI errors and clear the interrupt
*
* NOTE: If you don't have this function and a 2940 card encounters
* a PCI error condition, the machine will end up locked as the
* interrupt handler gets slammed with non-stop PCI error interrupts
*-F*************************************************************************/
static void
aic7xxx_pci_intr(struct aic7xxx_host *p)
{
unsigned char status1;
pci_read_config_byte(p->pdev, PCI_STATUS + 1, &status1);
if ( (status1 & DPE) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
printk(WARN_LEAD "Data Parity Error during PCI address or PCI write"
"phase.\n", p->host_no, -1, -1, -1);
if ( (status1 & SSE) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
printk(WARN_LEAD "Signal System Error Detected\n", p->host_no,
-1, -1, -1);
if ( (status1 & RMA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
printk(WARN_LEAD "Received a PCI Master Abort\n", p->host_no,
-1, -1, -1);
if ( (status1 & RTA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
printk(WARN_LEAD "Received a PCI Target Abort\n", p->host_no,
-1, -1, -1);
if ( (status1 & STA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
printk(WARN_LEAD "Signaled a PCI Target Abort\n", p->host_no,
-1, -1, -1);
if ( (status1 & DPR) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
printk(WARN_LEAD "Data Parity Error has been reported via PCI pin "
"PERR#\n", p->host_no, -1, -1, -1);
pci_write_config_byte(p->pdev, PCI_STATUS + 1, status1);
if (status1 & (DPR|RMA|RTA))
aic_outb(p, CLRPARERR, CLRINT);
if ( (aic7xxx_panic_on_abort) && (p->spurious_int > 500) )
aic7xxx_panic_abort(p, NULL);
}
#endif /* CONFIG_PCI */
/*+F*************************************************************************
* Function:
* aic7xxx_construct_ppr
*
* Description:
* Build up a Parallel Protocol Request message for use with SCSI-3
* devices.
*-F*************************************************************************/
static void
aic7xxx_construct_ppr(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
p->msg_buf[p->msg_index++] = MSG_EXTENDED;
p->msg_buf[p->msg_index++] = MSG_EXT_PPR_LEN;
p->msg_buf[p->msg_index++] = MSG_EXT_PPR;
p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.period;
p->msg_buf[p->msg_index++] = 0;
p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.offset;
p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.width;
p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.options;
p->msg_len += 8;
}
/*+F*************************************************************************
* Function:
* aic7xxx_construct_sdtr
*
* Description:
* Constucts a synchronous data transfer message in the message
* buffer on the sequencer.
*-F*************************************************************************/
static void
aic7xxx_construct_sdtr(struct aic7xxx_host *p, unsigned char period,
unsigned char offset)
{
p->msg_buf[p->msg_index++] = MSG_EXTENDED;
p->msg_buf[p->msg_index++] = MSG_EXT_SDTR_LEN;
p->msg_buf[p->msg_index++] = MSG_EXT_SDTR;
p->msg_buf[p->msg_index++] = period;
p->msg_buf[p->msg_index++] = offset;
p->msg_len += 5;
}
/*+F*************************************************************************
* Function:
* aic7xxx_construct_wdtr
*
* Description:
* Constucts a wide data transfer message in the message buffer
* on the sequencer.
*-F*************************************************************************/
static void
aic7xxx_construct_wdtr(struct aic7xxx_host *p, unsigned char bus_width)
{
p->msg_buf[p->msg_index++] = MSG_EXTENDED;
p->msg_buf[p->msg_index++] = MSG_EXT_WDTR_LEN;
p->msg_buf[p->msg_index++] = MSG_EXT_WDTR;
p->msg_buf[p->msg_index++] = bus_width;
p->msg_len += 4;
}
/*+F*************************************************************************
* Function:
* aic7xxx_calc_residual
*
* Description:
* Calculate the residual data not yet transferred.
*-F*************************************************************************/
static void
aic7xxx_calculate_residual (struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
struct aic7xxx_hwscb *hscb;
struct scsi_cmnd *cmd;
int actual, i;
cmd = scb->cmd;
hscb = scb->hscb;
/*
* Don't destroy valid residual information with
* residual coming from a check sense operation.
*/
if (((scb->hscb->control & DISCONNECTED) == 0) &&
(scb->flags & SCB_SENSE) == 0)
{
/*
* We had an underflow. At this time, there's only
* one other driver that bothers to check for this,
* and cmd->underflow seems to be set rather half-
* heartedly in the higher-level SCSI code.
*/
actual = scb->sg_length;
for (i=1; i < hscb->residual_SG_segment_count; i++)
{
actual -= scb->sg_list[scb->sg_count - i].length;
}
actual -= (hscb->residual_data_count[2] << 16) |
(hscb->residual_data_count[1] << 8) |
hscb->residual_data_count[0];
if (actual < cmd->underflow)
{
if (aic7xxx_verbose & VERBOSE_MINOR_ERROR)
{
printk(INFO_LEAD "Underflow - Wanted %u, %s %u, residual SG "
"count %d.\n", p->host_no, CTL_OF_SCB(scb), cmd->underflow,
(rq_data_dir(cmd->request) == WRITE) ? "wrote" : "read", actual,
hscb->residual_SG_segment_count);
printk(INFO_LEAD "status 0x%x.\n", p->host_no, CTL_OF_SCB(scb),
hscb->target_status);
}
/*
* In 2.4, only send back the residual information, don't flag this
* as an error. Before 2.4 we had to flag this as an error because
* the mid layer didn't check residual data counts to see if the
* command needs retried.
*/
scsi_set_resid(cmd, scb->sg_length - actual);
aic7xxx_status(cmd) = hscb->target_status;
}
}
/*
* Clean out the residual information in the SCB for the
* next consumer.
*/
hscb->residual_data_count[2] = 0;
hscb->residual_data_count[1] = 0;
hscb->residual_data_count[0] = 0;
hscb->residual_SG_segment_count = 0;
}
/*+F*************************************************************************
* Function:
* aic7xxx_handle_device_reset
*
* Description:
* Interrupt handler for sequencer interrupts (SEQINT).
*-F*************************************************************************/
static void
aic7xxx_handle_device_reset(struct aic7xxx_host *p, int target, int channel)
{
unsigned char tindex = target;
tindex |= ((channel & 0x01) << 3);
/*
* Go back to async/narrow transfers and renegotiate.
*/
aic_outb(p, 0, TARG_SCSIRATE + tindex);
if (p->features & AHC_ULTRA2)
aic_outb(p, 0, TARG_OFFSET + tindex);
aic7xxx_reset_device(p, target, channel, ALL_LUNS, SCB_LIST_NULL);
if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
printk(INFO_LEAD "Bus Device Reset delivered.\n", p->host_no, channel,
target, -1);
aic7xxx_run_done_queue(p, /*complete*/ TRUE);
}
/*+F*************************************************************************
* Function:
* aic7xxx_handle_seqint
*
* Description:
* Interrupt handler for sequencer interrupts (SEQINT).
*-F*************************************************************************/
static void
aic7xxx_handle_seqint(struct aic7xxx_host *p, unsigned char intstat)
{
struct aic7xxx_scb *scb;
struct aic_dev_data *aic_dev;
unsigned short target_mask;
unsigned char target, lun, tindex;
unsigned char queue_flag = FALSE;
char channel;
int result;
target = ((aic_inb(p, SAVED_TCL) >> 4) & 0x0f);
if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
channel = (aic_inb(p, SBLKCTL) & SELBUSB) >> 3;
else
channel = 0;
tindex = target + (channel << 3);
lun = aic_inb(p, SAVED_TCL) & 0x07;
target_mask = (0x01 << tindex);
/*
* Go ahead and clear the SEQINT now, that avoids any interrupt race
* conditions later on in case we enable some other interrupt.
*/
aic_outb(p, CLRSEQINT, CLRINT);
switch (intstat & SEQINT_MASK)
{
case NO_MATCH:
{
aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP),
SCSISEQ);
printk(WARN_LEAD "No active SCB for reconnecting target - Issuing "
"BUS DEVICE RESET.\n", p->host_no, channel, target, lun);
printk(WARN_LEAD " SAVED_TCL=0x%x, ARG_1=0x%x, SEQADDR=0x%x\n",
p->host_no, channel, target, lun,
aic_inb(p, SAVED_TCL), aic_inb(p, ARG_1),
(aic_inb(p, SEQADDR1) << 8) | aic_inb(p, SEQADDR0));
if (aic7xxx_panic_on_abort)
aic7xxx_panic_abort(p, NULL);
}
break;
case SEND_REJECT:
{
if (aic7xxx_verbose & VERBOSE_MINOR_ERROR)
printk(INFO_LEAD "Rejecting unknown message (0x%x) received from "
"target, SEQ_FLAGS=0x%x\n", p->host_no, channel, target, lun,
aic_inb(p, ACCUM), aic_inb(p, SEQ_FLAGS));
}
break;
case NO_IDENT:
{
/*
* The reconnecting target either did not send an identify
* message, or did, but we didn't find an SCB to match and
* before it could respond to our ATN/abort, it hit a dataphase.
* The only safe thing to do is to blow it away with a bus
* reset.
*/
if (aic7xxx_verbose & (VERBOSE_SEQINT | VERBOSE_RESET_MID))
printk(INFO_LEAD "Target did not send an IDENTIFY message; "
"LASTPHASE 0x%x, SAVED_TCL 0x%x\n", p->host_no, channel, target,
lun, aic_inb(p, LASTPHASE), aic_inb(p, SAVED_TCL));
aic7xxx_reset_channel(p, channel, /*initiate reset*/ TRUE);
aic7xxx_run_done_queue(p, TRUE);
}
break;
case BAD_PHASE:
if (aic_inb(p, LASTPHASE) == P_BUSFREE)
{
if (aic7xxx_verbose & VERBOSE_SEQINT)
printk(INFO_LEAD "Missed busfree.\n", p->host_no, channel,
target, lun);
restart_sequencer(p);
}
else
{
if (aic7xxx_verbose & VERBOSE_SEQINT)
printk(INFO_LEAD "Unknown scsi bus phase, continuing\n", p->host_no,
channel, target, lun);
}
break;
case EXTENDED_MSG:
{
p->msg_type = MSG_TYPE_INITIATOR_MSGIN;
p->msg_len = 0;
p->msg_index = 0;
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
printk(INFO_LEAD "Enabling REQINITs for MSG_IN\n", p->host_no,
channel, target, lun);
#endif
/*
* To actually receive the message, simply turn on
* REQINIT interrupts and let our interrupt handler
* do the rest (REQINIT should already be true).
*/
p->flags |= AHC_HANDLING_REQINITS;
aic_outb(p, aic_inb(p, SIMODE1) | ENREQINIT, SIMODE1);
/*
* We don't want the sequencer unpaused yet so we return early
*/
return;
}
case REJECT_MSG:
{
/*
* What we care about here is if we had an outstanding SDTR
* or WDTR message for this target. If we did, this is a
* signal that the target is refusing negotiation.
*/
unsigned char scb_index;
unsigned char last_msg;
scb_index = aic_inb(p, SCB_TAG);
scb = p->scb_data->scb_array[scb_index];
aic_dev = AIC_DEV(scb->cmd);
last_msg = aic_inb(p, LAST_MSG);
if ( (last_msg == MSG_IDENTIFYFLAG) &&
(scb->tag_action) &&
!(scb->flags & SCB_MSGOUT_BITS) )
{
if (scb->tag_action == MSG_ORDERED_Q_TAG)
{
/*
* OK...the device seems able to accept tagged commands, but
* not ordered tag commands, only simple tag commands. So, we
* disable ordered tag commands and go on with life just like
* normal.
*/
scsi_adjust_queue_depth(scb->cmd->device, MSG_SIMPLE_TAG,
scb->cmd->device->queue_depth);
scb->tag_action = MSG_SIMPLE_Q_TAG;
scb->hscb->control &= ~SCB_TAG_TYPE;
scb->hscb->control |= MSG_SIMPLE_Q_TAG;
aic_outb(p, scb->hscb->control, SCB_CONTROL);
/*
* OK..we set the tag type to simple tag command, now we re-assert
* ATNO and hope this will take us into the identify phase again
* so we can resend the tag type and info to the device.
*/
aic_outb(p, MSG_IDENTIFYFLAG, MSG_OUT);
aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO);
}
else if (scb->tag_action == MSG_SIMPLE_Q_TAG)
{
unsigned char i;
struct aic7xxx_scb *scbp;
int old_verbose;
/*
* Hmmmm....the device is flaking out on tagged commands.
*/
scsi_adjust_queue_depth(scb->cmd->device, 0 /* untagged */,
p->host->cmd_per_lun);
aic_dev->max_q_depth = aic_dev->temp_q_depth = 1;
/*
* We set this command up as a bus device reset. However, we have
* to clear the tag type as it's causing us problems. We shouldnt
* have to worry about any other commands being active, since if
* the device is refusing tagged commands, this should be the
* first tagged command sent to the device, however, we do have
* to worry about any other tagged commands that may already be
* in the qinfifo. The easiest way to do this, is to issue a BDR,
* send all the commands back to the mid level code, then let them
* come back and get rebuilt as untagged commands.
*/
scb->tag_action = 0;
scb->hscb->control &= ~(TAG_ENB | SCB_TAG_TYPE);
aic_outb(p, scb->hscb->control, SCB_CONTROL);
old_verbose = aic7xxx_verbose;
aic7xxx_verbose &= ~(VERBOSE_RESET|VERBOSE_ABORT);
for (i=0; i < p->scb_data->numscbs; i++)
{
scbp = p->scb_data->scb_array[i];
if ((scbp->flags & SCB_ACTIVE) && (scbp != scb))
{
if (aic7xxx_match_scb(p, scbp, target, channel, lun, i))
{
aic7xxx_reset_device(p, target, channel, lun, i);
}
}
}
aic7xxx_run_done_queue(p, TRUE);
aic7xxx_verbose = old_verbose;
/*
* Wait until after the for loop to set the busy index since
* aic7xxx_reset_device will clear the busy index during its
* operation.
*/
aic7xxx_busy_target(p, scb);
printk(INFO_LEAD "Device is refusing tagged commands, using "
"untagged I/O.\n", p->host_no, channel, target, lun);
aic_outb(p, MSG_IDENTIFYFLAG, MSG_OUT);
aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO);
}
}
else if (scb->flags & SCB_MSGOUT_PPR)
{
/*
* As per the draft specs, any device capable of supporting any of
* the option values other than 0 are not allowed to reject the
* PPR message. Instead, they must negotiate out what they do
* support instead of rejecting our offering or else they cause
* a parity error during msg_out phase to signal that they don't
* like our settings.
*/
aic_dev->needppr = aic_dev->needppr_copy = 0;
aic7xxx_set_width(p, target, channel, lun, MSG_EXT_WDTR_BUS_8_BIT,
(AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE), aic_dev);
aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0, 0,
AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE,
aic_dev);
aic_dev->goal.options = aic_dev->dtr_pending = 0;
scb->flags &= ~SCB_MSGOUT_BITS;
if(aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Device is rejecting PPR messages, falling "
"back.\n", p->host_no, channel, target, lun);
}
if ( aic_dev->goal.width )
{
aic_dev->needwdtr = aic_dev->needwdtr_copy = 1;
aic_dev->dtr_pending = 1;
scb->flags |= SCB_MSGOUT_WDTR;
}
if ( aic_dev->goal.offset )
{
aic_dev->needsdtr = aic_dev->needsdtr_copy = 1;
if( !aic_dev->dtr_pending )
{
aic_dev->dtr_pending = 1;
scb->flags |= SCB_MSGOUT_SDTR;
}
}
if ( aic_dev->dtr_pending )
{
aic_outb(p, HOST_MSG, MSG_OUT);
aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO);
}
}
else if (scb->flags & SCB_MSGOUT_WDTR)
{
/*
* note 8bit xfers and clear flag
*/
aic_dev->needwdtr = aic_dev->needwdtr_copy = 0;
scb->flags &= ~SCB_MSGOUT_BITS;
aic7xxx_set_width(p, target, channel, lun, MSG_EXT_WDTR_BUS_8_BIT,
(AHC_TRANS_ACTIVE|AHC_TRANS_GOAL|AHC_TRANS_CUR), aic_dev);
aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0, 0,
AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE,
aic_dev);
if(aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Device is rejecting WDTR messages, using "
"narrow transfers.\n", p->host_no, channel, target, lun);
}
aic_dev->needsdtr = aic_dev->needsdtr_copy;
}
else if (scb->flags & SCB_MSGOUT_SDTR)
{
/*
* note asynch xfers and clear flag
*/
aic_dev->needsdtr = aic_dev->needsdtr_copy = 0;
scb->flags &= ~SCB_MSGOUT_BITS;
aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0, 0,
(AHC_TRANS_CUR|AHC_TRANS_ACTIVE|AHC_TRANS_GOAL), aic_dev);
if(aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Device is rejecting SDTR messages, using "
"async transfers.\n", p->host_no, channel, target, lun);
}
}
else if (aic7xxx_verbose & VERBOSE_SEQINT)
{
/*
* Otherwise, we ignore it.
*/
printk(INFO_LEAD "Received MESSAGE_REJECT for unknown cause. "
"Ignoring.\n", p->host_no, channel, target, lun);
}
}
break;
case BAD_STATUS:
{
unsigned char scb_index;
struct aic7xxx_hwscb *hscb;
struct scsi_cmnd *cmd;
/* The sequencer will notify us when a command has an error that
* would be of interest to the kernel. This allows us to leave
* the sequencer running in the common case of command completes
* without error. The sequencer will have DMA'd the SCB back
* up to us, so we can reference the drivers SCB array.
*
* Set the default return value to 0 indicating not to send
* sense. The sense code will change this if needed and this
* reduces code duplication.
*/
aic_outb(p, 0, RETURN_1);
scb_index = aic_inb(p, SCB_TAG);
if (scb_index > p->scb_data->numscbs)
{
printk(WARN_LEAD "Invalid SCB during SEQINT 0x%02x, SCB_TAG %d.\n",
p->host_no, channel, target, lun, intstat, scb_index);
break;
}
scb = p->scb_data->scb_array[scb_index];
hscb = scb->hscb;
if (!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL))
{
printk(WARN_LEAD "Invalid SCB during SEQINT 0x%x, scb %d, flags 0x%x,"
" cmd 0x%lx.\n", p->host_no, channel, target, lun, intstat,
scb_index, scb->flags, (unsigned long) scb->cmd);
}
else
{
cmd = scb->cmd;
aic_dev = AIC_DEV(scb->cmd);
hscb->target_status = aic_inb(p, SCB_TARGET_STATUS);
aic7xxx_status(cmd) = hscb->target_status;
cmd->result = hscb->target_status;
switch (status_byte(hscb->target_status))
{
case GOOD:
if (aic7xxx_verbose & VERBOSE_SEQINT)
printk(INFO_LEAD "Interrupted for status of GOOD???\n",
p->host_no, CTL_OF_SCB(scb));
break;
case COMMAND_TERMINATED:
case CHECK_CONDITION:
if ( !(scb->flags & SCB_SENSE) )
{
/*
* Send a sense command to the requesting target.
* XXX - revisit this and get rid of the memcopys.
*/
memcpy(scb->sense_cmd, &generic_sense[0],
sizeof(generic_sense));
scb->sense_cmd[1] = (cmd->device->lun << 5);
scb->sense_cmd[4] = SCSI_SENSE_BUFFERSIZE;
scb->sg_list[0].length =
cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
scb->sg_list[0].address =
cpu_to_le32(pci_map_single(p->pdev, cmd->sense_buffer,
SCSI_SENSE_BUFFERSIZE,
PCI_DMA_FROMDEVICE));
/*
* XXX - We should allow disconnection, but can't as it
* might allow overlapped tagged commands.
*/
/* hscb->control &= DISCENB; */
hscb->control = 0;
hscb->target_status = 0;
hscb->SG_list_pointer =
cpu_to_le32(SCB_DMA_ADDR(scb, scb->sg_list));
hscb->SCSI_cmd_pointer =
cpu_to_le32(SCB_DMA_ADDR(scb, scb->sense_cmd));
hscb->data_count = scb->sg_list[0].length;
hscb->data_pointer = scb->sg_list[0].address;
hscb->SCSI_cmd_length = COMMAND_SIZE(scb->sense_cmd[0]);
hscb->residual_SG_segment_count = 0;
hscb->residual_data_count[0] = 0;
hscb->residual_data_count[1] = 0;
hscb->residual_data_count[2] = 0;
scb->sg_count = hscb->SG_segment_count = 1;
scb->sg_length = SCSI_SENSE_BUFFERSIZE;
scb->tag_action = 0;
scb->flags |= SCB_SENSE;
/*
* Ensure the target is busy since this will be an
* an untagged request.
*/
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
if (scb->flags & SCB_MSGOUT_BITS)
printk(INFO_LEAD "Requesting SENSE with %s\n", p->host_no,
CTL_OF_SCB(scb), (scb->flags & SCB_MSGOUT_SDTR) ?
"SDTR" : "WDTR");
else
printk(INFO_LEAD "Requesting SENSE, no MSG\n", p->host_no,
CTL_OF_SCB(scb));
}
#endif
aic7xxx_busy_target(p, scb);
aic_outb(p, SEND_SENSE, RETURN_1);
aic7xxx_error(cmd) = DID_OK;
break;
} /* first time sense, no errors */
printk(INFO_LEAD "CHECK_CONDITION on REQUEST_SENSE, returning "
"an error.\n", p->host_no, CTL_OF_SCB(scb));
aic7xxx_error(cmd) = DID_ERROR;
scb->flags &= ~SCB_SENSE;
break;
case QUEUE_FULL:
queue_flag = TRUE; /* Mark that this is a QUEUE_FULL and */
case BUSY: /* drop through to here */
{
struct aic7xxx_scb *next_scbp, *prev_scbp;
unsigned char active_hscb, next_hscb, prev_hscb, scb_index;
/*
* We have to look three places for queued commands:
* 1: p->waiting_scbs queue
* 2: QINFIFO
* 3: WAITING_SCBS list on card (for commands that are started
* but haven't yet made it to the device)
*
* Of special note here is that commands on 2 or 3 above will
* have already been marked as active, while commands on 1 will
* not. The aic7xxx_done() function will want to unmark them
* from active, so any commands we pull off of 1 need to
* up the active count.
*/
next_scbp = p->waiting_scbs.head;
while ( next_scbp != NULL )
{
prev_scbp = next_scbp;
next_scbp = next_scbp->q_next;
if ( aic7xxx_match_scb(p, prev_scbp, target, channel, lun,
SCB_LIST_NULL) )
{
scbq_remove(&p->waiting_scbs, prev_scbp);
scb->flags = SCB_QUEUED_FOR_DONE | SCB_QUEUE_FULL;
p->activescbs++;
aic_dev->active_cmds++;
}
}
aic7xxx_search_qinfifo(p, target, channel, lun,
SCB_LIST_NULL, SCB_QUEUED_FOR_DONE | SCB_QUEUE_FULL,
FALSE, NULL);
next_scbp = NULL;
active_hscb = aic_inb(p, SCBPTR);
prev_hscb = next_hscb = scb_index = SCB_LIST_NULL;
next_hscb = aic_inb(p, WAITING_SCBH);
while (next_hscb != SCB_LIST_NULL)
{
aic_outb(p, next_hscb, SCBPTR);
scb_index = aic_inb(p, SCB_TAG);
if (scb_index < p->scb_data->numscbs)
{
next_scbp = p->scb_data->scb_array[scb_index];
if (aic7xxx_match_scb(p, next_scbp, target, channel, lun,
SCB_LIST_NULL) )
{
next_scbp->flags = SCB_QUEUED_FOR_DONE | SCB_QUEUE_FULL;
next_hscb = aic_inb(p, SCB_NEXT);
aic_outb(p, 0, SCB_CONTROL);
aic_outb(p, SCB_LIST_NULL, SCB_TAG);
aic7xxx_add_curscb_to_free_list(p);
if (prev_hscb == SCB_LIST_NULL)
{
/* We were first on the list,
* so we kill the selection
* hardware. Let the sequencer
* re-init the hardware itself
*/
aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ);
aic_outb(p, CLRSELTIMEO, CLRSINT1);
aic_outb(p, next_hscb, WAITING_SCBH);
}
else
{
aic_outb(p, prev_hscb, SCBPTR);
aic_outb(p, next_hscb, SCB_NEXT);
}
}
else
{
prev_hscb = next_hscb;
next_hscb = aic_inb(p, SCB_NEXT);
}
} /* scb_index >= p->scb_data->numscbs */
}
aic_outb(p, active_hscb, SCBPTR);
aic7xxx_run_done_queue(p, FALSE);
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if( (aic7xxx_verbose & VERBOSE_MINOR_ERROR) ||
(aic7xxx_verbose > 0xffff) )
{
if (queue_flag)
printk(INFO_LEAD "Queue full received; queue depth %d, "
"active %d\n", p->host_no, CTL_OF_SCB(scb),
aic_dev->max_q_depth, aic_dev->active_cmds);
else
printk(INFO_LEAD "Target busy\n", p->host_no, CTL_OF_SCB(scb));
}
#endif
if (queue_flag)
{
int diff;
result = scsi_track_queue_full(cmd->device,
aic_dev->active_cmds);
if ( result < 0 )
{
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
printk(INFO_LEAD "Tagged Command Queueing disabled.\n",
p->host_no, CTL_OF_SCB(scb));
diff = aic_dev->max_q_depth - p->host->cmd_per_lun;
aic_dev->temp_q_depth = 1;
aic_dev->max_q_depth = 1;
}
else if ( result > 0 )
{
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
printk(INFO_LEAD "Queue depth reduced to %d\n", p->host_no,
CTL_OF_SCB(scb), result);
diff = aic_dev->max_q_depth - result;
aic_dev->max_q_depth = result;
/* temp_q_depth could have been dropped to 1 for an untagged
* command that might be coming up */
if(aic_dev->temp_q_depth > result)
aic_dev->temp_q_depth = result;
}
/* We should free up the no unused SCB entries. But, that's
* a difficult thing to do because we use a direct indexed
* array, so we can't just take any entries and free them,
* we *have* to free the ones at the end of the array, and
* they very well could be in use right now, which means
* in order to do this right, we have to add a delayed
* freeing mechanism tied into the scb_free() code area.
* We'll add that later.
*/
}
break;
}
default:
if (aic7xxx_verbose & VERBOSE_SEQINT)
printk(INFO_LEAD "Unexpected target status 0x%x.\n", p->host_no,
CTL_OF_SCB(scb), scb->hscb->target_status);
if (!aic7xxx_error(cmd))
{
aic7xxx_error(cmd) = DID_RETRY_COMMAND;
}
break;
} /* end switch */
} /* end else of */
}
break;
case AWAITING_MSG:
{
unsigned char scb_index, msg_out;
scb_index = aic_inb(p, SCB_TAG);
msg_out = aic_inb(p, MSG_OUT);
scb = p->scb_data->scb_array[scb_index];
aic_dev = AIC_DEV(scb->cmd);
p->msg_index = p->msg_len = 0;
/*
* This SCB had a MK_MESSAGE set in its control byte informing
* the sequencer that we wanted to send a special message to
* this target.
*/
if ( !(scb->flags & SCB_DEVICE_RESET) &&
(msg_out == MSG_IDENTIFYFLAG) &&
(scb->hscb->control & TAG_ENB) )
{
p->msg_buf[p->msg_index++] = scb->tag_action;
p->msg_buf[p->msg_index++] = scb->hscb->tag;
p->msg_len += 2;
}
if (scb->flags & SCB_DEVICE_RESET)
{
p->msg_buf[p->msg_index++] = MSG_BUS_DEV_RESET;
p->msg_len++;
if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
printk(INFO_LEAD "Bus device reset mailed.\n",
p->host_no, CTL_OF_SCB(scb));
}
else if (scb->flags & SCB_ABORT)
{
if (scb->tag_action)
{
p->msg_buf[p->msg_index++] = MSG_ABORT_TAG;
}
else
{
p->msg_buf[p->msg_index++] = MSG_ABORT;
}
p->msg_len++;
if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
printk(INFO_LEAD "Abort message mailed.\n", p->host_no,
CTL_OF_SCB(scb));
}
else if (scb->flags & SCB_MSGOUT_PPR)
{
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Sending PPR (%d/%d/%d/%d) message.\n",
p->host_no, CTL_OF_SCB(scb),
aic_dev->goal.period,
aic_dev->goal.offset,
aic_dev->goal.width,
aic_dev->goal.options);
}
aic7xxx_construct_ppr(p, scb);
}
else if (scb->flags & SCB_MSGOUT_WDTR)
{
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Sending WDTR message.\n", p->host_no,
CTL_OF_SCB(scb));
}
aic7xxx_construct_wdtr(p, aic_dev->goal.width);
}
else if (scb->flags & SCB_MSGOUT_SDTR)
{
unsigned int max_sync, period;
unsigned char options = 0;
/*
* Now that the device is selected, use the bits in SBLKCTL and
* SSTAT2 to determine the max sync rate for this device.
*/
if (p->features & AHC_ULTRA2)
{
if ( (aic_inb(p, SBLKCTL) & ENAB40) &&
!(aic_inb(p, SSTAT2) & EXP_ACTIVE) )
{
max_sync = AHC_SYNCRATE_ULTRA2;
}
else
{
max_sync = AHC_SYNCRATE_ULTRA;
}
}
else if (p->features & AHC_ULTRA)
{
max_sync = AHC_SYNCRATE_ULTRA;
}
else
{
max_sync = AHC_SYNCRATE_FAST;
}
period = aic_dev->goal.period;
aic7xxx_find_syncrate(p, &period, max_sync, &options);
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Sending SDTR %d/%d message.\n", p->host_no,
CTL_OF_SCB(scb), period,
aic_dev->goal.offset);
}
aic7xxx_construct_sdtr(p, period, aic_dev->goal.offset);
}
else
{
panic("aic7xxx: AWAITING_MSG for an SCB that does "
"not have a waiting message.\n");
}
/*
* We've set everything up to send our message, now to actually do
* so we need to enable reqinit interrupts and let the interrupt
* handler do the rest. We don't want to unpause the sequencer yet
* though so we'll return early. We also have to make sure that
* we clear the SEQINT *BEFORE* we set the REQINIT handler active
* or else it's possible on VLB cards to lose the first REQINIT
* interrupt. Edge triggered EISA cards could also lose this
* interrupt, although PCI and level triggered cards should not
* have this problem since they continually interrupt the kernel
* until we take care of the situation.
*/
scb->flags |= SCB_MSGOUT_SENT;
p->msg_index = 0;
p->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
p->flags |= AHC_HANDLING_REQINITS;
aic_outb(p, aic_inb(p, SIMODE1) | ENREQINIT, SIMODE1);
return;
}
break;
case DATA_OVERRUN:
{
unsigned char scb_index = aic_inb(p, SCB_TAG);
unsigned char lastphase = aic_inb(p, LASTPHASE);
unsigned int i;
scb = (p->scb_data->scb_array[scb_index]);
/*
* XXX - What do we really want to do on an overrun? The
* mid-level SCSI code should handle this, but for now,
* we'll just indicate that the command should retried.
* If we retrieved sense info on this target, then the
* base SENSE info should have been saved prior to the
* overrun error. In that case, we return DID_OK and let
* the mid level code pick up on the sense info. Otherwise
* we return DID_ERROR so the command will get retried.
*/
if ( !(scb->flags & SCB_SENSE) )
{
printk(WARN_LEAD "Data overrun detected in %s phase, tag %d;\n",
p->host_no, CTL_OF_SCB(scb),
(lastphase == P_DATAIN) ? "Data-In" : "Data-Out", scb->hscb->tag);
printk(KERN_WARNING " %s seen Data Phase. Length=%d, NumSGs=%d.\n",
(aic_inb(p, SEQ_FLAGS) & DPHASE) ? "Have" : "Haven't",
scb->sg_length, scb->sg_count);
printk(KERN_WARNING " Raw SCSI Command: 0x");
for (i = 0; i < scb->hscb->SCSI_cmd_length; i++)
{
printk("%02x ", scb->cmd->cmnd[i]);
}
printk("\n");
if(aic7xxx_verbose > 0xffff)
{
for (i = 0; i < scb->sg_count; i++)
{
printk(KERN_WARNING " sg[%d] - Addr 0x%x : Length %d\n",
i,
le32_to_cpu(scb->sg_list[i].address),
le32_to_cpu(scb->sg_list[i].length) );
}
}
aic7xxx_error(scb->cmd) = DID_ERROR;
}
else
printk(INFO_LEAD "Data Overrun during SEND_SENSE operation.\n",
p->host_no, CTL_OF_SCB(scb));
}
break;
case WIDE_RESIDUE:
{
unsigned char resid_sgcnt, index;
unsigned char scb_index = aic_inb(p, SCB_TAG);
unsigned int cur_addr, resid_dcnt;
unsigned int native_addr, native_length, sg_addr;
int i;
if(scb_index > p->scb_data->numscbs)
{
printk(WARN_LEAD "invalid scb_index during WIDE_RESIDUE.\n",
p->host_no, -1, -1, -1);
/*
* XXX: Add error handling here
*/
break;
}
scb = p->scb_data->scb_array[scb_index];
if(!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL))
{
printk(WARN_LEAD "invalid scb during WIDE_RESIDUE flags:0x%x "
"scb->cmd:0x%lx\n", p->host_no, CTL_OF_SCB(scb),
scb->flags, (unsigned long)scb->cmd);
break;
}
if(aic7xxx_verbose & VERBOSE_MINOR_ERROR)
printk(INFO_LEAD "Got WIDE_RESIDUE message, patching up data "
"pointer.\n", p->host_no, CTL_OF_SCB(scb));
/*
* We have a valid scb to use on this WIDE_RESIDUE message, so
* we need to walk the sg list looking for this particular sg
* segment, then see if we happen to be at the very beginning of
* the segment. If we are, then we have to back things up to
* the previous segment. If not, then we simply need to remove
* one byte from this segments address and add one to the byte
* count.
*/
cur_addr = aic_inb(p, SHADDR) | (aic_inb(p, SHADDR + 1) << 8) |
(aic_inb(p, SHADDR + 2) << 16) | (aic_inb(p, SHADDR + 3) << 24);
sg_addr = aic_inb(p, SG_COUNT + 1) | (aic_inb(p, SG_COUNT + 2) << 8) |
(aic_inb(p, SG_COUNT + 3) << 16) | (aic_inb(p, SG_COUNT + 4) << 24);
resid_sgcnt = aic_inb(p, SCB_RESID_SGCNT);
resid_dcnt = aic_inb(p, SCB_RESID_DCNT) |
(aic_inb(p, SCB_RESID_DCNT + 1) << 8) |
(aic_inb(p, SCB_RESID_DCNT + 2) << 16);
index = scb->sg_count - ((resid_sgcnt) ? resid_sgcnt : 1);
native_addr = le32_to_cpu(scb->sg_list[index].address);
native_length = le32_to_cpu(scb->sg_list[index].length);
/*
* If resid_dcnt == native_length, then we just loaded this SG
* segment and we need to back it up one...
*/
if(resid_dcnt == native_length)
{
if(index == 0)
{
/*
* Oops, this isn't right, we can't back up to before the
* beginning. This must be a bogus message, ignore it.
*/
break;
}
resid_dcnt = 1;
resid_sgcnt += 1;
native_addr = le32_to_cpu(scb->sg_list[index - 1].address);
native_length = le32_to_cpu(scb->sg_list[index - 1].length);
cur_addr = native_addr + (native_length - 1);
sg_addr -= sizeof(struct hw_scatterlist);
}
else
{
/*
* resid_dcnt != native_length, so we are in the middle of a SG
* element. Back it up one byte and leave the rest alone.
*/
resid_dcnt += 1;
cur_addr -= 1;
}
/*
* Output the new addresses and counts to the right places on the
* card.
*/
aic_outb(p, resid_sgcnt, SG_COUNT);
aic_outb(p, resid_sgcnt, SCB_RESID_SGCNT);
aic_outb(p, sg_addr & 0xff, SG_COUNT + 1);
aic_outb(p, (sg_addr >> 8) & 0xff, SG_COUNT + 2);
aic_outb(p, (sg_addr >> 16) & 0xff, SG_COUNT + 3);
aic_outb(p, (sg_addr >> 24) & 0xff, SG_COUNT + 4);
aic_outb(p, resid_dcnt & 0xff, SCB_RESID_DCNT);
aic_outb(p, (resid_dcnt >> 8) & 0xff, SCB_RESID_DCNT + 1);
aic_outb(p, (resid_dcnt >> 16) & 0xff, SCB_RESID_DCNT + 2);
/*
* The sequencer actually wants to find the new address
* in the SHADDR register set. On the Ultra2 and later controllers
* this register set is readonly. In order to get the right number
* into the register, you actually have to enter it in HADDR and then
* use the PRELOADEN bit of DFCNTRL to drop it through from the
* HADDR register to the SHADDR register. On non-Ultra2 controllers,
* we simply write it direct.
*/
if(p->features & AHC_ULTRA2)
{
/*
* We might as well be accurate and drop both the resid_dcnt and
* cur_addr into HCNT and HADDR and have both of them drop
* through to the shadow layer together.
*/
aic_outb(p, resid_dcnt & 0xff, HCNT);
aic_outb(p, (resid_dcnt >> 8) & 0xff, HCNT + 1);
aic_outb(p, (resid_dcnt >> 16) & 0xff, HCNT + 2);
aic_outb(p, cur_addr & 0xff, HADDR);
aic_outb(p, (cur_addr >> 8) & 0xff, HADDR + 1);
aic_outb(p, (cur_addr >> 16) & 0xff, HADDR + 2);
aic_outb(p, (cur_addr >> 24) & 0xff, HADDR + 3);
aic_outb(p, aic_inb(p, DMAPARAMS) | PRELOADEN, DFCNTRL);
udelay(1);
aic_outb(p, aic_inb(p, DMAPARAMS) & ~(SCSIEN|HDMAEN), DFCNTRL);
i=0;
while(((aic_inb(p, DFCNTRL) & (SCSIEN|HDMAEN)) != 0) && (i++ < 1000))
{
udelay(1);
}
}
else
{
aic_outb(p, cur_addr & 0xff, SHADDR);
aic_outb(p, (cur_addr >> 8) & 0xff, SHADDR + 1);
aic_outb(p, (cur_addr >> 16) & 0xff, SHADDR + 2);
aic_outb(p, (cur_addr >> 24) & 0xff, SHADDR + 3);
}
}
break;
case SEQ_SG_FIXUP:
{
unsigned char scb_index, tmp;
int sg_addr, sg_length;
scb_index = aic_inb(p, SCB_TAG);
if(scb_index > p->scb_data->numscbs)
{
printk(WARN_LEAD "invalid scb_index during SEQ_SG_FIXUP.\n",
p->host_no, -1, -1, -1);
printk(INFO_LEAD "SCSISIGI 0x%x, SEQADDR 0x%x, SSTAT0 0x%x, SSTAT1 "
"0x%x\n", p->host_no, -1, -1, -1,
aic_inb(p, SCSISIGI),
aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
aic_inb(p, SSTAT0), aic_inb(p, SSTAT1));
printk(INFO_LEAD "SG_CACHEPTR 0x%x, SSTAT2 0x%x, STCNT 0x%x\n",
p->host_no, -1, -1, -1, aic_inb(p, SG_CACHEPTR),
aic_inb(p, SSTAT2), aic_inb(p, STCNT + 2) << 16 |
aic_inb(p, STCNT + 1) << 8 | aic_inb(p, STCNT));
/*
* XXX: Add error handling here
*/
break;
}
scb = p->scb_data->scb_array[scb_index];
if(!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL))
{
printk(WARN_LEAD "invalid scb during SEQ_SG_FIXUP flags:0x%x "
"scb->cmd:0x%p\n", p->host_no, CTL_OF_SCB(scb),
scb->flags, scb->cmd);
printk(INFO_LEAD "SCSISIGI 0x%x, SEQADDR 0x%x, SSTAT0 0x%x, SSTAT1 "
"0x%x\n", p->host_no, CTL_OF_SCB(scb),
aic_inb(p, SCSISIGI),
aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
aic_inb(p, SSTAT0), aic_inb(p, SSTAT1));
printk(INFO_LEAD "SG_CACHEPTR 0x%x, SSTAT2 0x%x, STCNT 0x%x\n",
p->host_no, CTL_OF_SCB(scb), aic_inb(p, SG_CACHEPTR),
aic_inb(p, SSTAT2), aic_inb(p, STCNT + 2) << 16 |
aic_inb(p, STCNT + 1) << 8 | aic_inb(p, STCNT));
break;
}
if(aic7xxx_verbose & VERBOSE_MINOR_ERROR)
printk(INFO_LEAD "Fixing up SG address for sequencer.\n", p->host_no,
CTL_OF_SCB(scb));
/*
* Advance the SG pointer to the next element in the list
*/
tmp = aic_inb(p, SG_NEXT);
tmp += SG_SIZEOF;
aic_outb(p, tmp, SG_NEXT);
if( tmp < SG_SIZEOF )
aic_outb(p, aic_inb(p, SG_NEXT + 1) + 1, SG_NEXT + 1);
tmp = aic_inb(p, SG_COUNT) - 1;
aic_outb(p, tmp, SG_COUNT);
sg_addr = le32_to_cpu(scb->sg_list[scb->sg_count - tmp].address);
sg_length = le32_to_cpu(scb->sg_list[scb->sg_count - tmp].length);
/*
* Now stuff the element we just advanced past down onto the
* card so it can be stored in the residual area.
*/
aic_outb(p, sg_addr & 0xff, HADDR);
aic_outb(p, (sg_addr >> 8) & 0xff, HADDR + 1);
aic_outb(p, (sg_addr >> 16) & 0xff, HADDR + 2);
aic_outb(p, (sg_addr >> 24) & 0xff, HADDR + 3);
aic_outb(p, sg_length & 0xff, HCNT);
aic_outb(p, (sg_length >> 8) & 0xff, HCNT + 1);
aic_outb(p, (sg_length >> 16) & 0xff, HCNT + 2);
aic_outb(p, (tmp << 2) | ((tmp == 1) ? LAST_SEG : 0), SG_CACHEPTR);
aic_outb(p, aic_inb(p, DMAPARAMS), DFCNTRL);
while(aic_inb(p, SSTAT0) & SDONE) udelay(1);
while(aic_inb(p, DFCNTRL) & (HDMAEN|SCSIEN)) aic_outb(p, 0, DFCNTRL);
}
break;
#ifdef AIC7XXX_NOT_YET
case TRACEPOINT2:
{
printk(INFO_LEAD "Tracepoint #2 reached.\n", p->host_no,
channel, target, lun);
}
break;
/* XXX Fill these in later */
case MSG_BUFFER_BUSY:
printk("aic7xxx: Message buffer busy.\n");
break;
case MSGIN_PHASEMIS:
printk("aic7xxx: Message-in phasemis.\n");
break;
#endif
default: /* unknown */
printk(WARN_LEAD "Unknown SEQINT, INTSTAT 0x%x, SCSISIGI 0x%x.\n",
p->host_no, channel, target, lun, intstat,
aic_inb(p, SCSISIGI));
break;
}
/*
* Clear the sequencer interrupt and unpause the sequencer.
*/
unpause_sequencer(p, /* unpause always */ TRUE);
}
/*+F*************************************************************************
* Function:
* aic7xxx_parse_msg
*
* Description:
* Parses incoming messages into actions on behalf of
* aic7xxx_handle_reqinit
*_F*************************************************************************/
static int
aic7xxx_parse_msg(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
int reject, reply, done;
unsigned char target_scsirate, tindex;
unsigned short target_mask;
unsigned char target, channel, lun;
unsigned char bus_width, new_bus_width;
unsigned char trans_options, new_trans_options;
unsigned int period, new_period, offset, new_offset, maxsync;
struct aic7xxx_syncrate *syncrate;
struct aic_dev_data *aic_dev;
target = scb->cmd->device->id;
channel = scb->cmd->device->channel;
lun = scb->cmd->device->lun;
reply = reject = done = FALSE;
tindex = TARGET_INDEX(scb->cmd);
aic_dev = AIC_DEV(scb->cmd);
target_scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
target_mask = (0x01 << tindex);
/*
* Parse as much of the message as is available,
* rejecting it if we don't support it. When
* the entire message is available and has been
* handled, return TRUE indicating that we have
* parsed an entire message.
*/
if (p->msg_buf[0] != MSG_EXTENDED)
{
reject = TRUE;
}
/*
* Even if we are an Ultra3 card, don't allow Ultra3 sync rates when
* using the SDTR messages. We need the PPR messages to enable the
* higher speeds that include things like Dual Edge clocking.
*/
if (p->features & AHC_ULTRA2)
{
if ( (aic_inb(p, SBLKCTL) & ENAB40) &&
!(aic_inb(p, SSTAT2) & EXP_ACTIVE) )
{
if (p->features & AHC_ULTRA3)
maxsync = AHC_SYNCRATE_ULTRA3;
else
maxsync = AHC_SYNCRATE_ULTRA2;
}
else
{
maxsync = AHC_SYNCRATE_ULTRA;
}
}
else if (p->features & AHC_ULTRA)
{
maxsync = AHC_SYNCRATE_ULTRA;
}
else
{
maxsync = AHC_SYNCRATE_FAST;
}
/*
* Just accept the length byte outright and perform
* more checking once we know the message type.
*/
if ( !reject && (p->msg_len > 2) )
{
switch(p->msg_buf[2])
{
case MSG_EXT_SDTR:
{
if (p->msg_buf[1] != MSG_EXT_SDTR_LEN)
{
reject = TRUE;
break;
}
if (p->msg_len < (MSG_EXT_SDTR_LEN + 2))
{
break;
}
period = new_period = p->msg_buf[3];
offset = new_offset = p->msg_buf[4];
trans_options = new_trans_options = 0;
bus_width = new_bus_width = target_scsirate & WIDEXFER;
/*
* If our current max syncrate is in the Ultra3 range, bump it back
* down to Ultra2 since we can't negotiate DT transfers using SDTR
*/
if(maxsync == AHC_SYNCRATE_ULTRA3)
maxsync = AHC_SYNCRATE_ULTRA2;
/*
* We might have a device that is starting negotiation with us
* before we can start up negotiation with it....be prepared to
* have a device ask for a higher speed then we want to give it
* in that case
*/
if ( (scb->flags & (SCB_MSGOUT_SENT|SCB_MSGOUT_SDTR)) !=
(SCB_MSGOUT_SENT|SCB_MSGOUT_SDTR) )
{
if (!(aic_dev->flags & DEVICE_DTR_SCANNED))
{
/*
* We shouldn't get here unless this is a narrow drive, wide
* devices should trigger this same section of code in the WDTR
* handler first instead.
*/
aic_dev->goal.width = MSG_EXT_WDTR_BUS_8_BIT;
aic_dev->goal.options = 0;
if(p->user[tindex].offset)
{
aic_dev->needsdtr_copy = 1;
aic_dev->goal.period = max_t(unsigned char, 10,p->user[tindex].period);
if(p->features & AHC_ULTRA2)
{
aic_dev->goal.offset = MAX_OFFSET_ULTRA2;
}
else
{
aic_dev->goal.offset = MAX_OFFSET_8BIT;
}
}
else
{
aic_dev->needsdtr_copy = 0;
aic_dev->goal.period = 255;
aic_dev->goal.offset = 0;
}
aic_dev->flags |= DEVICE_DTR_SCANNED | DEVICE_PRINT_DTR;
}
else if (aic_dev->needsdtr_copy == 0)
{
/*
* This is a preemptive message from the target, we've already
* scanned this target and set our options for it, and we
* don't need a SDTR with this target (for whatever reason),
* so reject this incoming SDTR
*/
reject = TRUE;
break;
}
/* The device is sending this message first and we have to reply */
reply = TRUE;
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Received pre-emptive SDTR message from "
"target.\n", p->host_no, CTL_OF_SCB(scb));
}
/*
* Validate the values the device passed to us against our SEEPROM
* settings. We don't have to do this if we aren't replying since
* the device isn't allowed to send values greater than the ones
* we first sent to it.
*/
new_period = max_t(unsigned int, period, aic_dev->goal.period);
new_offset = min_t(unsigned int, offset, aic_dev->goal.offset);
}
/*
* Use our new_period, new_offset, bus_width, and card options
* to determine the actual syncrate settings
*/
syncrate = aic7xxx_find_syncrate(p, &new_period, maxsync,
&trans_options);
aic7xxx_validate_offset(p, syncrate, &new_offset, bus_width);
/*
* Did we drop to async? If so, send a reply regardless of whether
* or not we initiated this negotiation.
*/
if ((new_offset == 0) && (new_offset != offset))
{
aic_dev->needsdtr_copy = 0;
reply = TRUE;
}
/*
* Did we start this, if not, or if we went too low and had to
* go async, then send an SDTR back to the target
*/
if(reply)
{
/* when sending a reply, make sure that the goal settings are
* updated along with current and active since the code that
* will actually build the message for the sequencer uses the
* goal settings as its guidelines.
*/
aic7xxx_set_syncrate(p, syncrate, target, channel, new_period,
new_offset, trans_options,
AHC_TRANS_GOAL|AHC_TRANS_ACTIVE|AHC_TRANS_CUR,
aic_dev);
scb->flags &= ~SCB_MSGOUT_BITS;
scb->flags |= SCB_MSGOUT_SDTR;
aic_outb(p, HOST_MSG, MSG_OUT);
aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO);
}
else
{
aic7xxx_set_syncrate(p, syncrate, target, channel, new_period,
new_offset, trans_options,
AHC_TRANS_ACTIVE|AHC_TRANS_CUR, aic_dev);
aic_dev->needsdtr = 0;
}
done = TRUE;
break;
}
case MSG_EXT_WDTR:
{
if (p->msg_buf[1] != MSG_EXT_WDTR_LEN)
{
reject = TRUE;
break;
}
if (p->msg_len < (MSG_EXT_WDTR_LEN + 2))
{
break;
}
bus_width = new_bus_width = p->msg_buf[3];
if ( (scb->flags & (SCB_MSGOUT_SENT|SCB_MSGOUT_WDTR)) ==
(SCB_MSGOUT_SENT|SCB_MSGOUT_WDTR) )
{
switch(bus_width)
{
default:
{
reject = TRUE;
if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
((aic_dev->flags & DEVICE_PRINT_DTR) ||
(aic7xxx_verbose > 0xffff)) )
{
printk(INFO_LEAD "Requesting %d bit transfers, rejecting.\n",
p->host_no, CTL_OF_SCB(scb), 8 * (0x01 << bus_width));
}
} /* We fall through on purpose */
case MSG_EXT_WDTR_BUS_8_BIT:
{
aic_dev->goal.width = MSG_EXT_WDTR_BUS_8_BIT;
aic_dev->needwdtr_copy &= ~target_mask;
break;
}
case MSG_EXT_WDTR_BUS_16_BIT:
{
break;
}
}
aic_dev->needwdtr = 0;
aic7xxx_set_width(p, target, channel, lun, new_bus_width,
AHC_TRANS_ACTIVE|AHC_TRANS_CUR, aic_dev);
}
else
{
if ( !(aic_dev->flags & DEVICE_DTR_SCANNED) )
{
/*
* Well, we now know the WDTR and SYNC caps of this device since
* it contacted us first, mark it as such and copy the user stuff
* over to the goal stuff.
*/
if( (p->features & AHC_WIDE) && p->user[tindex].width )
{
aic_dev->goal.width = MSG_EXT_WDTR_BUS_16_BIT;
aic_dev->needwdtr_copy = 1;
}
/*
* Devices that support DT transfers don't start WDTR requests
*/
aic_dev->goal.options = 0;
if(p->user[tindex].offset)
{
aic_dev->needsdtr_copy = 1;
aic_dev->goal.period = max_t(unsigned char, 10, p->user[tindex].period);
if(p->features & AHC_ULTRA2)
{
aic_dev->goal.offset = MAX_OFFSET_ULTRA2;
}
else if( aic_dev->goal.width )
{
aic_dev->goal.offset = MAX_OFFSET_16BIT;
}
else
{
aic_dev->goal.offset = MAX_OFFSET_8BIT;
}
} else {
aic_dev->needsdtr_copy = 0;
aic_dev->goal.period = 255;
aic_dev->goal.offset = 0;
}
aic_dev->flags |= DEVICE_DTR_SCANNED | DEVICE_PRINT_DTR;
}
else if (aic_dev->needwdtr_copy == 0)
{
/*
* This is a preemptive message from the target, we've already
* scanned this target and set our options for it, and we
* don't need a WDTR with this target (for whatever reason),
* so reject this incoming WDTR
*/
reject = TRUE;
break;
}
/* The device is sending this message first and we have to reply */
reply = TRUE;
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Received pre-emptive WDTR message from "
"target.\n", p->host_no, CTL_OF_SCB(scb));
}
switch(bus_width)
{
case MSG_EXT_WDTR_BUS_16_BIT:
{
if ( (p->features & AHC_WIDE) &&
(aic_dev->goal.width == MSG_EXT_WDTR_BUS_16_BIT) )
{
new_bus_width = MSG_EXT_WDTR_BUS_16_BIT;
break;
}
} /* Fall through if we aren't a wide card */
default:
case MSG_EXT_WDTR_BUS_8_BIT:
{
aic_dev->needwdtr_copy = 0;
new_bus_width = MSG_EXT_WDTR_BUS_8_BIT;
break;
}
}
scb->flags &= ~SCB_MSGOUT_BITS;
scb->flags |= SCB_MSGOUT_WDTR;
aic_dev->needwdtr = 0;
if(aic_dev->dtr_pending == 0)
{
/* there is no other command with SCB_DTR_SCB already set that will
* trigger the release of the dtr_pending bit. Both set the bit
* and set scb->flags |= SCB_DTR_SCB
*/
aic_dev->dtr_pending = 1;
scb->flags |= SCB_DTR_SCB;
}
aic_outb(p, HOST_MSG, MSG_OUT);
aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO);
/* when sending a reply, make sure that the goal settings are
* updated along with current and active since the code that
* will actually build the message for the sequencer uses the
* goal settings as its guidelines.
*/
aic7xxx_set_width(p, target, channel, lun, new_bus_width,
AHC_TRANS_GOAL|AHC_TRANS_ACTIVE|AHC_TRANS_CUR,
aic_dev);
}
/*
* By virtue of the SCSI spec, a WDTR message negates any existing
* SDTR negotiations. So, even if needsdtr isn't marked for this
* device, we still have to do a new SDTR message if the device
* supports SDTR at all. Therefore, we check needsdtr_copy instead
* of needstr.
*/
aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0, 0,
AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE,
aic_dev);
aic_dev->needsdtr = aic_dev->needsdtr_copy;
done = TRUE;
break;
}
case MSG_EXT_PPR:
{
if (p->msg_buf[1] != MSG_EXT_PPR_LEN)
{
reject = TRUE;
break;
}
if (p->msg_len < (MSG_EXT_PPR_LEN + 2))
{
break;
}
period = new_period = p->msg_buf[3];
offset = new_offset = p->msg_buf[5];
bus_width = new_bus_width = p->msg_buf[6];
trans_options = new_trans_options = p->msg_buf[7] & 0xf;
if(aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Parsing PPR message (%d/%d/%d/%d)\n",
p->host_no, CTL_OF_SCB(scb), period, offset, bus_width,
trans_options);
}
/*
* We might have a device that is starting negotiation with us
* before we can start up negotiation with it....be prepared to
* have a device ask for a higher speed then we want to give it
* in that case
*/
if ( (scb->flags & (SCB_MSGOUT_SENT|SCB_MSGOUT_PPR)) !=
(SCB_MSGOUT_SENT|SCB_MSGOUT_PPR) )
{
/* Have we scanned the device yet? */
if (!(aic_dev->flags & DEVICE_DTR_SCANNED))
{
/* The device is electing to use PPR messages, so we will too until
* we know better */
aic_dev->needppr = aic_dev->needppr_copy = 1;
aic_dev->needsdtr = aic_dev->needsdtr_copy = 0;
aic_dev->needwdtr = aic_dev->needwdtr_copy = 0;
/* We know the device is SCSI-3 compliant due to PPR */
aic_dev->flags |= DEVICE_SCSI_3;
/*
* Not only is the device starting this up, but it also hasn't
* been scanned yet, so this would likely be our TUR or our
* INQUIRY command at scan time, so we need to use the
* settings from the SEEPROM if they existed. Of course, even
* if we didn't find a SEEPROM, we stuffed default values into
* the user settings anyway, so use those in all cases.
*/
aic_dev->goal.width = p->user[tindex].width;
if(p->user[tindex].offset)
{
aic_dev->goal.period = p->user[tindex].period;
aic_dev->goal.options = p->user[tindex].options;
if(p->features & AHC_ULTRA2)
{
aic_dev->goal.offset = MAX_OFFSET_ULTRA2;
}
else if( aic_dev->goal.width &&
(bus_width == MSG_EXT_WDTR_BUS_16_BIT) &&
p->features & AHC_WIDE )
{
aic_dev->goal.offset = MAX_OFFSET_16BIT;
}
else
{
aic_dev->goal.offset = MAX_OFFSET_8BIT;
}
}
else
{
aic_dev->goal.period = 255;
aic_dev->goal.offset = 0;
aic_dev->goal.options = 0;
}
aic_dev->flags |= DEVICE_DTR_SCANNED | DEVICE_PRINT_DTR;
}
else if (aic_dev->needppr_copy == 0)
{
/*
* This is a preemptive message from the target, we've already
* scanned this target and set our options for it, and we
* don't need a PPR with this target (for whatever reason),
* so reject this incoming PPR
*/
reject = TRUE;
break;
}
/* The device is sending this message first and we have to reply */
reply = TRUE;
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Received pre-emptive PPR message from "
"target.\n", p->host_no, CTL_OF_SCB(scb));
}
}
switch(bus_width)
{
case MSG_EXT_WDTR_BUS_16_BIT:
{
if ( (aic_dev->goal.width == MSG_EXT_WDTR_BUS_16_BIT) &&
p->features & AHC_WIDE)
{
break;
}
}
default:
{
if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
((aic_dev->flags & DEVICE_PRINT_DTR) ||
(aic7xxx_verbose > 0xffff)) )
{
reply = TRUE;
printk(INFO_LEAD "Requesting %d bit transfers, rejecting.\n",
p->host_no, CTL_OF_SCB(scb), 8 * (0x01 << bus_width));
}
} /* We fall through on purpose */
case MSG_EXT_WDTR_BUS_8_BIT:
{
/*
* According to the spec, if we aren't wide, we also can't be
* Dual Edge so clear the options byte
*/
new_trans_options = 0;
new_bus_width = MSG_EXT_WDTR_BUS_8_BIT;
break;
}
}
if(reply)
{
/* when sending a reply, make sure that the goal settings are
* updated along with current and active since the code that
* will actually build the message for the sequencer uses the
* goal settings as its guidelines.
*/
aic7xxx_set_width(p, target, channel, lun, new_bus_width,
AHC_TRANS_GOAL|AHC_TRANS_ACTIVE|AHC_TRANS_CUR,
aic_dev);
syncrate = aic7xxx_find_syncrate(p, &new_period, maxsync,
&new_trans_options);
aic7xxx_validate_offset(p, syncrate, &new_offset, new_bus_width);
aic7xxx_set_syncrate(p, syncrate, target, channel, new_period,
new_offset, new_trans_options,
AHC_TRANS_GOAL|AHC_TRANS_ACTIVE|AHC_TRANS_CUR,
aic_dev);
}
else
{
aic7xxx_set_width(p, target, channel, lun, new_bus_width,
AHC_TRANS_ACTIVE|AHC_TRANS_CUR, aic_dev);
syncrate = aic7xxx_find_syncrate(p, &new_period, maxsync,
&new_trans_options);
aic7xxx_validate_offset(p, syncrate, &new_offset, new_bus_width);
aic7xxx_set_syncrate(p, syncrate, target, channel, new_period,
new_offset, new_trans_options,
AHC_TRANS_ACTIVE|AHC_TRANS_CUR, aic_dev);
}
/*
* As it turns out, if we don't *have* to have PPR messages, then
* configure ourselves not to use them since that makes some
* external drive chassis work (those chassis can't parse PPR
* messages and they mangle the SCSI bus until you send a WDTR
* and SDTR that they can understand).
*/
if(new_trans_options == 0)
{
aic_dev->needppr = aic_dev->needppr_copy = 0;
if(new_offset)
{
aic_dev->needsdtr = aic_dev->needsdtr_copy = 1;
}
if (new_bus_width)
{
aic_dev->needwdtr = aic_dev->needwdtr_copy = 1;
}
}
if((new_offset == 0) && (offset != 0))
{
/*
* Oops, the syncrate went to low for this card and we fell off
* to async (should never happen with a device that uses PPR
* messages, but have to be complete)
*/
reply = TRUE;
}
if(reply)
{
scb->flags &= ~SCB_MSGOUT_BITS;
scb->flags |= SCB_MSGOUT_PPR;
aic_outb(p, HOST_MSG, MSG_OUT);
aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO);
}
else
{
aic_dev->needppr = 0;
}
done = TRUE;
break;
}
default:
{
reject = TRUE;
break;
}
} /* end of switch(p->msg_type) */
} /* end of if (!reject && (p->msg_len > 2)) */
if (!reply && reject)
{
aic_outb(p, MSG_MESSAGE_REJECT, MSG_OUT);
aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO);
done = TRUE;
}
return(done);
}
/*+F*************************************************************************
* Function:
* aic7xxx_handle_reqinit
*
* Description:
* Interrupt handler for REQINIT interrupts (used to transfer messages to
* and from devices).
*_F*************************************************************************/
static void
aic7xxx_handle_reqinit(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
{
unsigned char lastbyte;
unsigned char phasemis;
int done = FALSE;
switch(p->msg_type)
{
case MSG_TYPE_INITIATOR_MSGOUT:
{
if (p->msg_len == 0)
panic("aic7xxx: REQINIT with no active message!\n");
lastbyte = (p->msg_index == (p->msg_len - 1));
phasemis = ( aic_inb(p, SCSISIGI) & PHASE_MASK) != P_MESGOUT;
if (lastbyte || phasemis)
{
/* Time to end the message */
p->msg_len = 0;
p->msg_type = MSG_TYPE_NONE;
/*
* NOTE-TO-MYSELF: If you clear the REQINIT after you
* disable REQINITs, then cases of REJECT_MSG stop working
* and hang the bus
*/
aic_outb(p, aic_inb(p, SIMODE1) & ~ENREQINIT, SIMODE1);
aic_outb(p, CLRSCSIINT, CLRINT);
p->flags &= ~AHC_HANDLING_REQINITS;
if (phasemis == 0)
{
aic_outb(p, p->msg_buf[p->msg_index], SINDEX);
aic_outb(p, 0, RETURN_1);
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
printk(INFO_LEAD "Completed sending of REQINIT message.\n",
p->host_no, CTL_OF_SCB(scb));
#endif
}
else
{
aic_outb(p, MSGOUT_PHASEMIS, RETURN_1);
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
printk(INFO_LEAD "PHASEMIS while sending REQINIT message.\n",
p->host_no, CTL_OF_SCB(scb));
#endif
}
unpause_sequencer(p, TRUE);
}
else
{
/*
* Present the byte on the bus (clearing REQINIT) but don't
* unpause the sequencer.
*/
aic_outb(p, CLRREQINIT, CLRSINT1);
aic_outb(p, CLRSCSIINT, CLRINT);
aic_outb(p, p->msg_buf[p->msg_index++], SCSIDATL);
}
break;
}
case MSG_TYPE_INITIATOR_MSGIN:
{
phasemis = ( aic_inb(p, SCSISIGI) & PHASE_MASK ) != P_MESGIN;
if (phasemis == 0)
{
p->msg_len++;
/* Pull the byte in without acking it */
p->msg_buf[p->msg_index] = aic_inb(p, SCSIBUSL);
done = aic7xxx_parse_msg(p, scb);
/* Ack the byte */
aic_outb(p, CLRREQINIT, CLRSINT1);
aic_outb(p, CLRSCSIINT, CLRINT);
aic_inb(p, SCSIDATL);
p->msg_index++;
}
if (phasemis || done)
{
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
{
if (phasemis)
printk(INFO_LEAD "PHASEMIS while receiving REQINIT message.\n",
p->host_no, CTL_OF_SCB(scb));
else
printk(INFO_LEAD "Completed receipt of REQINIT message.\n",
p->host_no, CTL_OF_SCB(scb));
}
#endif
/* Time to end our message session */
p->msg_len = 0;
p->msg_type = MSG_TYPE_NONE;
aic_outb(p, aic_inb(p, SIMODE1) & ~ENREQINIT, SIMODE1);
aic_outb(p, CLRSCSIINT, CLRINT);
p->flags &= ~AHC_HANDLING_REQINITS;
unpause_sequencer(p, TRUE);
}
break;
}
default:
{
panic("aic7xxx: Unknown REQINIT message type.\n");
break;
}
} /* End of switch(p->msg_type) */
}
/*+F*************************************************************************
* Function:
* aic7xxx_handle_scsiint
*
* Description:
* Interrupt handler for SCSI interrupts (SCSIINT).
*-F*************************************************************************/
static void
aic7xxx_handle_scsiint(struct aic7xxx_host *p, unsigned char intstat)
{
unsigned char scb_index;
unsigned char status;
struct aic7xxx_scb *scb;
struct aic_dev_data *aic_dev;
scb_index = aic_inb(p, SCB_TAG);
status = aic_inb(p, SSTAT1);
if (scb_index < p->scb_data->numscbs)
{
scb = p->scb_data->scb_array[scb_index];
if ((scb->flags & SCB_ACTIVE) == 0)
{
scb = NULL;
}
}
else
{
scb = NULL;
}
if ((status & SCSIRSTI) != 0)
{
int channel;
if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
channel = (aic_inb(p, SBLKCTL) & SELBUSB) >> 3;
else
channel = 0;
if (aic7xxx_verbose & VERBOSE_RESET)
printk(WARN_LEAD "Someone else reset the channel!!\n",
p->host_no, channel, -1, -1);
if (aic7xxx_panic_on_abort)
aic7xxx_panic_abort(p, NULL);
/*
* Go through and abort all commands for the channel, but do not
* reset the channel again.
*/
aic7xxx_reset_channel(p, channel, /* Initiate Reset */ FALSE);
aic7xxx_run_done_queue(p, TRUE);
scb = NULL;
}
else if ( ((status & BUSFREE) != 0) && ((status & SELTO) == 0) )
{
/*
* First look at what phase we were last in. If it's message-out,
* chances are pretty good that the bus free was in response to
* one of our abort requests.
*/
unsigned char lastphase = aic_inb(p, LASTPHASE);
unsigned char saved_tcl = aic_inb(p, SAVED_TCL);
unsigned char target = (saved_tcl >> 4) & 0x0F;
int channel;
int printerror = TRUE;
if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
channel = (aic_inb(p, SBLKCTL) & SELBUSB) >> 3;
else
channel = 0;
aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP),
SCSISEQ);
if (lastphase == P_MESGOUT)
{
unsigned char message;
message = aic_inb(p, SINDEX);
if ((message == MSG_ABORT) || (message == MSG_ABORT_TAG))
{
if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
printk(INFO_LEAD "SCB %d abort delivered.\n", p->host_no,
CTL_OF_SCB(scb), scb->hscb->tag);
aic7xxx_reset_device(p, target, channel, ALL_LUNS,
(message == MSG_ABORT) ? SCB_LIST_NULL : scb->hscb->tag );
aic7xxx_run_done_queue(p, TRUE);
scb = NULL;
printerror = 0;
}
else if (message == MSG_BUS_DEV_RESET)
{
aic7xxx_handle_device_reset(p, target, channel);
scb = NULL;
printerror = 0;
}
}
if ( (scb != NULL) && (scb->flags & SCB_DTR_SCB) )
{
/*
* Hmmm...error during a negotiation command. Either we have a
* borken bus, or the device doesn't like our negotiation message.
* Since we check the INQUIRY data of a device before sending it
* negotiation messages, assume the bus is borken for whatever
* reason. Complete the command.
*/
printerror = 0;
aic7xxx_reset_device(p, target, channel, ALL_LUNS, scb->hscb->tag);
aic7xxx_run_done_queue(p, TRUE);
scb = NULL;
}
if (printerror != 0)
{
if (scb != NULL)
{
unsigned char tag;
if ((scb->hscb->control & TAG_ENB) != 0)
{
tag = scb->hscb->tag;
}
else
{
tag = SCB_LIST_NULL;
}
aic7xxx_reset_device(p, target, channel, ALL_LUNS, tag);
aic7xxx_run_done_queue(p, TRUE);
}
else
{
aic7xxx_reset_device(p, target, channel, ALL_LUNS, SCB_LIST_NULL);
aic7xxx_run_done_queue(p, TRUE);
}
printk(INFO_LEAD "Unexpected busfree, LASTPHASE = 0x%x, "
"SEQADDR = 0x%x\n", p->host_no, channel, target, -1, lastphase,
(aic_inb(p, SEQADDR1) << 8) | aic_inb(p, SEQADDR0));
scb = NULL;
}
aic_outb(p, MSG_NOOP, MSG_OUT);
aic_outb(p, aic_inb(p, SIMODE1) & ~(ENBUSFREE|ENREQINIT),
SIMODE1);
p->flags &= ~AHC_HANDLING_REQINITS;
aic_outb(p, CLRBUSFREE, CLRSINT1);
aic_outb(p, CLRSCSIINT, CLRINT);
restart_sequencer(p);
unpause_sequencer(p, TRUE);
}
else if ((status & SELTO) != 0)
{
unsigned char scbptr;
unsigned char nextscb;
struct scsi_cmnd *cmd;
scbptr = aic_inb(p, WAITING_SCBH);
if (scbptr > p->scb_data->maxhscbs)
{
/*
* I'm still trying to track down exactly how this happens, but until
* I find it, this code will make sure we aren't passing bogus values
* into the SCBPTR register, even if that register will just wrap
* things around, we still don't like having out of range variables.
*
* NOTE: Don't check the aic7xxx_verbose variable, I want this message
* to always be displayed.
*/
printk(INFO_LEAD "Invalid WAITING_SCBH value %d, improvising.\n",
p->host_no, -1, -1, -1, scbptr);
if (p->scb_data->maxhscbs > 4)
scbptr &= (p->scb_data->maxhscbs - 1);
else
scbptr &= 0x03;
}
aic_outb(p, scbptr, SCBPTR);
scb_index = aic_inb(p, SCB_TAG);
scb = NULL;
if (scb_index < p->scb_data->numscbs)
{
scb = p->scb_data->scb_array[scb_index];
if ((scb->flags & SCB_ACTIVE) == 0)
{
scb = NULL;
}
}
if (scb == NULL)
{
printk(WARN_LEAD "Referenced SCB %d not valid during SELTO.\n",
p->host_no, -1, -1, -1, scb_index);
printk(KERN_WARNING " SCSISEQ = 0x%x SEQADDR = 0x%x SSTAT0 = 0x%x "
"SSTAT1 = 0x%x\n", aic_inb(p, SCSISEQ),
aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
aic_inb(p, SSTAT0), aic_inb(p, SSTAT1));
if (aic7xxx_panic_on_abort)
aic7xxx_panic_abort(p, NULL);
}
else
{
cmd = scb->cmd;
cmd->result = (DID_TIME_OUT << 16);
/*
* Clear out this hardware SCB
*/
aic_outb(p, 0, SCB_CONTROL);
/*
* Clear out a few values in the card that are in an undetermined
* state.
*/
aic_outb(p, MSG_NOOP, MSG_OUT);
/*
* Shift the waiting for selection queue forward
*/
nextscb = aic_inb(p, SCB_NEXT);
aic_outb(p, nextscb, WAITING_SCBH);
/*
* Put this SCB back on the free list.
*/
aic7xxx_add_curscb_to_free_list(p);
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
printk(INFO_LEAD "Selection Timeout.\n", p->host_no, CTL_OF_SCB(scb));
#endif
if (scb->flags & SCB_QUEUED_ABORT)
{
/*
* We know that this particular SCB had to be the queued abort since
* the disconnected SCB would have gotten a reconnect instead.
* What we need to do then is to let the command timeout again so
* we get a reset since this abort just failed.
*/
cmd->result = 0;
scb = NULL;
}
}
/*
* Keep the sequencer from trying to restart any selections
*/
aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ);
/*
* Make sure the data bits on the bus are released
* Don't do this on 7770 chipsets, it makes them give us
* a BRKADDRINT and kills the card.
*/
if( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI )
aic_outb(p, 0, SCSIBUSL);
/*
* Delay for the selection timeout delay period then stop the selection
*/
udelay(301);
aic_outb(p, CLRSELINGO, CLRSINT0);
/*
* Clear out all the interrupt status bits
*/
aic_outb(p, aic_inb(p, SIMODE1) & ~(ENREQINIT|ENBUSFREE), SIMODE1);
p->flags &= ~AHC_HANDLING_REQINITS;
aic_outb(p, CLRSELTIMEO | CLRBUSFREE, CLRSINT1);
aic_outb(p, CLRSCSIINT, CLRINT);
/*
* Restarting the sequencer will stop the selection and make sure devices
* are allowed to reselect in.
*/
restart_sequencer(p);
unpause_sequencer(p, TRUE);
}
else if (scb == NULL)
{
printk(WARN_LEAD "aic7xxx_isr - referenced scb not valid "
"during scsiint 0x%x scb(%d)\n"
" SIMODE0 0x%x, SIMODE1 0x%x, SSTAT0 0x%x, SEQADDR 0x%x\n",
p->host_no, -1, -1, -1, status, scb_index, aic_inb(p, SIMODE0),
aic_inb(p, SIMODE1), aic_inb(p, SSTAT0),
(aic_inb(p, SEQADDR1) << 8) | aic_inb(p, SEQADDR0));
/*
* Turn off the interrupt and set status to zero, so that it
* falls through the rest of the SCSIINT code.
*/
aic_outb(p, status, CLRSINT1);
aic_outb(p, CLRSCSIINT, CLRINT);
unpause_sequencer(p, /* unpause always */ TRUE);
scb = NULL;
}
else if (status & SCSIPERR)
{
/*
* Determine the bus phase and queue an appropriate message.
*/
char *phase;
struct scsi_cmnd *cmd;
unsigned char mesg_out = MSG_NOOP;
unsigned char lastphase = aic_inb(p, LASTPHASE);
unsigned char sstat2 = aic_inb(p, SSTAT2);
cmd = scb->cmd;
switch (lastphase)
{
case P_DATAOUT:
phase = "Data-Out";
break;
case P_DATAIN:
phase = "Data-In";
mesg_out = MSG_INITIATOR_DET_ERR;
break;
case P_COMMAND:
phase = "Command";
break;
case P_MESGOUT:
phase = "Message-Out";
break;
case P_STATUS:
phase = "Status";
mesg_out = MSG_INITIATOR_DET_ERR;
break;
case P_MESGIN:
phase = "Message-In";
mesg_out = MSG_PARITY_ERROR;
break;
default:
phase = "unknown";
break;
}
/*
* A parity error has occurred during a data
* transfer phase. Flag it and continue.
*/
if( (p->features & AHC_ULTRA3) &&
(aic_inb(p, SCSIRATE) & AHC_SYNCRATE_CRC) &&
(lastphase == P_DATAIN) )
{
printk(WARN_LEAD "CRC error during %s phase.\n",
p->host_no, CTL_OF_SCB(scb), phase);
if(sstat2 & CRCVALERR)
{
printk(WARN_LEAD " CRC error in intermediate CRC packet.\n",
p->host_no, CTL_OF_SCB(scb));
}
if(sstat2 & CRCENDERR)
{
printk(WARN_LEAD " CRC error in ending CRC packet.\n",
p->host_no, CTL_OF_SCB(scb));
}
if(sstat2 & CRCREQERR)
{
printk(WARN_LEAD " Target incorrectly requested a CRC packet.\n",
p->host_no, CTL_OF_SCB(scb));
}
if(sstat2 & DUAL_EDGE_ERROR)
{
printk(WARN_LEAD " Dual Edge transmission error.\n",
p->host_no, CTL_OF_SCB(scb));
}
}
else if( (lastphase == P_MESGOUT) &&
(scb->flags & SCB_MSGOUT_PPR) )
{
/*
* As per the draft specs, any device capable of supporting any of
* the option values other than 0 are not allowed to reject the
* PPR message. Instead, they must negotiate out what they do
* support instead of rejecting our offering or else they cause
* a parity error during msg_out phase to signal that they don't
* like our settings.
*/
aic_dev = AIC_DEV(scb->cmd);
aic_dev->needppr = aic_dev->needppr_copy = 0;
aic7xxx_set_width(p, scb->cmd->device->id, scb->cmd->device->channel, scb->cmd->device->lun,
MSG_EXT_WDTR_BUS_8_BIT,
(AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE),
aic_dev);
aic7xxx_set_syncrate(p, NULL, scb->cmd->device->id, scb->cmd->device->channel, 0, 0,
0, AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE,
aic_dev);
aic_dev->goal.options = 0;
scb->flags &= ~SCB_MSGOUT_BITS;
if(aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "parity error during PPR message, reverting "
"to WDTR/SDTR\n", p->host_no, CTL_OF_SCB(scb));
}
if ( aic_dev->goal.width )
{
aic_dev->needwdtr = aic_dev->needwdtr_copy = 1;
}
if ( aic_dev->goal.offset )
{
if( aic_dev->goal.period <= 9 )
{
aic_dev->goal.period = 10;
}
aic_dev->needsdtr = aic_dev->needsdtr_copy = 1;
}
scb = NULL;
}
/*
* We've set the hardware to assert ATN if we get a parity
* error on "in" phases, so all we need to do is stuff the
* message buffer with the appropriate message. "In" phases
* have set mesg_out to something other than MSG_NOP.
*/
if (mesg_out != MSG_NOOP)
{
aic_outb(p, mesg_out, MSG_OUT);
aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO);
scb = NULL;
}
aic_outb(p, CLRSCSIPERR, CLRSINT1);
aic_outb(p, CLRSCSIINT, CLRINT);
unpause_sequencer(p, /* unpause_always */ TRUE);
}
else if ( (status & REQINIT) &&
(p->flags & AHC_HANDLING_REQINITS) )
{
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic7xxx_verbose > 0xffff)
printk(INFO_LEAD "Handling REQINIT, SSTAT1=0x%x.\n", p->host_no,
CTL_OF_SCB(scb), aic_inb(p, SSTAT1));
#endif
aic7xxx_handle_reqinit(p, scb);
return;
}
else
{
/*
* We don't know what's going on. Turn off the
* interrupt source and try to continue.
*/
if (aic7xxx_verbose & VERBOSE_SCSIINT)
printk(INFO_LEAD "Unknown SCSIINT status, SSTAT1(0x%x).\n",
p->host_no, -1, -1, -1, status);
aic_outb(p, status, CLRSINT1);
aic_outb(p, CLRSCSIINT, CLRINT);
unpause_sequencer(p, /* unpause always */ TRUE);
scb = NULL;
}
if (scb != NULL)
{
aic7xxx_done(p, scb);
}
}
#ifdef AIC7XXX_VERBOSE_DEBUGGING
static void
aic7xxx_check_scbs(struct aic7xxx_host *p, char *buffer)
{
unsigned char saved_scbptr, free_scbh, dis_scbh, wait_scbh, temp;
int i, bogus, lost;
static unsigned char scb_status[AIC7XXX_MAXSCB];
#define SCB_NO_LIST 0
#define SCB_FREE_LIST 1
#define SCB_WAITING_LIST 2
#define SCB_DISCONNECTED_LIST 4
#define SCB_CURRENTLY_ACTIVE 8
/*
* Note, these checks will fail on a regular basis once the machine moves
* beyond the bus scan phase. The problem is race conditions concerning
* the scbs and where they are linked in. When you have 30 or so commands
* outstanding on the bus, and run this twice with every interrupt, the
* chances get pretty good that you'll catch the sequencer with an SCB
* only partially linked in. Therefore, once we pass the scan phase
* of the bus, we really should disable this function.
*/
bogus = FALSE;
memset(&scb_status[0], 0, sizeof(scb_status));
pause_sequencer(p);
saved_scbptr = aic_inb(p, SCBPTR);
if (saved_scbptr >= p->scb_data->maxhscbs)
{
printk("Bogus SCBPTR %d\n", saved_scbptr);
bogus = TRUE;
}
scb_status[saved_scbptr] = SCB_CURRENTLY_ACTIVE;
free_scbh = aic_inb(p, FREE_SCBH);
if ( (free_scbh != SCB_LIST_NULL) &&
(free_scbh >= p->scb_data->maxhscbs) )
{
printk("Bogus FREE_SCBH %d\n", free_scbh);
bogus = TRUE;
}
else
{
temp = free_scbh;
while( (temp != SCB_LIST_NULL) && (temp < p->scb_data->maxhscbs) )
{
if(scb_status[temp] & 0x07)
{
printk("HSCB %d on multiple lists, status 0x%02x", temp,
scb_status[temp] | SCB_FREE_LIST);
bogus = TRUE;
}
scb_status[temp] |= SCB_FREE_LIST;
aic_outb(p, temp, SCBPTR);
temp = aic_inb(p, SCB_NEXT);
}
}
dis_scbh = aic_inb(p, DISCONNECTED_SCBH);
if ( (dis_scbh != SCB_LIST_NULL) &&
(dis_scbh >= p->scb_data->maxhscbs) )
{
printk("Bogus DISCONNECTED_SCBH %d\n", dis_scbh);
bogus = TRUE;
}
else
{
temp = dis_scbh;
while( (temp != SCB_LIST_NULL) && (temp < p->scb_data->maxhscbs) )
{
if(scb_status[temp] & 0x07)
{
printk("HSCB %d on multiple lists, status 0x%02x", temp,
scb_status[temp] | SCB_DISCONNECTED_LIST);
bogus = TRUE;
}
scb_status[temp] |= SCB_DISCONNECTED_LIST;
aic_outb(p, temp, SCBPTR);
temp = aic_inb(p, SCB_NEXT);
}
}
wait_scbh = aic_inb(p, WAITING_SCBH);
if ( (wait_scbh != SCB_LIST_NULL) &&
(wait_scbh >= p->scb_data->maxhscbs) )
{
printk("Bogus WAITING_SCBH %d\n", wait_scbh);
bogus = TRUE;
}
else
{
temp = wait_scbh;
while( (temp != SCB_LIST_NULL) && (temp < p->scb_data->maxhscbs) )
{
if(scb_status[temp] & 0x07)
{
printk("HSCB %d on multiple lists, status 0x%02x", temp,
scb_status[temp] | SCB_WAITING_LIST);
bogus = TRUE;
}
scb_status[temp] |= SCB_WAITING_LIST;
aic_outb(p, temp, SCBPTR);
temp = aic_inb(p, SCB_NEXT);
}
}
lost=0;
for(i=0; i < p->scb_data->maxhscbs; i++)
{
aic_outb(p, i, SCBPTR);
temp = aic_inb(p, SCB_NEXT);
if ( ((temp != SCB_LIST_NULL) &&
(temp >= p->scb_data->maxhscbs)) )
{
printk("HSCB %d bad, SCB_NEXT invalid(%d).\n", i, temp);
bogus = TRUE;
}
if ( temp == i )
{
printk("HSCB %d bad, SCB_NEXT points to self.\n", i);
bogus = TRUE;
}
if (scb_status[i] == 0)
lost++;
if (lost > 1)
{
printk("Too many lost scbs.\n");
bogus=TRUE;
}
}
aic_outb(p, saved_scbptr, SCBPTR);
unpause_sequencer(p, FALSE);
if (bogus)
{
printk("Bogus parameters found in card SCB array structures.\n");
printk("%s\n", buffer);
aic7xxx_panic_abort(p, NULL);
}
return;
}
#endif
/*+F*************************************************************************
* Function:
* aic7xxx_handle_command_completion_intr
*
* Description:
* SCSI command completion interrupt handler.
*-F*************************************************************************/
static void
aic7xxx_handle_command_completion_intr(struct aic7xxx_host *p)
{
struct aic7xxx_scb *scb = NULL;
struct aic_dev_data *aic_dev;
struct scsi_cmnd *cmd;
unsigned char scb_index, tindex;
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if( (p->isr_count < 16) && (aic7xxx_verbose > 0xffff) )
printk(INFO_LEAD "Command Complete Int.\n", p->host_no, -1, -1, -1);
#endif
/*
* Read the INTSTAT location after clearing the CMDINT bit. This forces
* any posted PCI writes to flush to memory. Gerard Roudier suggested
* this fix to the possible race of clearing the CMDINT bit but not
* having all command bytes flushed onto the qoutfifo.
*/
aic_outb(p, CLRCMDINT, CLRINT);
aic_inb(p, INTSTAT);
/*
* The sequencer will continue running when it
* issues this interrupt. There may be >1 commands
* finished, so loop until we've processed them all.
*/
while (p->qoutfifo[p->qoutfifonext] != SCB_LIST_NULL)
{
scb_index = p->qoutfifo[p->qoutfifonext];
p->qoutfifo[p->qoutfifonext++] = SCB_LIST_NULL;
if ( scb_index >= p->scb_data->numscbs )
{
printk(WARN_LEAD "CMDCMPLT with invalid SCB index %d\n", p->host_no,
-1, -1, -1, scb_index);
continue;
}
scb = p->scb_data->scb_array[scb_index];
if (!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL))
{
printk(WARN_LEAD "CMDCMPLT without command for SCB %d, SCB flags "
"0x%x, cmd 0x%lx\n", p->host_no, -1, -1, -1, scb_index, scb->flags,
(unsigned long) scb->cmd);
continue;
}
tindex = TARGET_INDEX(scb->cmd);
aic_dev = AIC_DEV(scb->cmd);
if (scb->flags & SCB_QUEUED_ABORT)
{
pause_sequencer(p);
if ( ((aic_inb(p, LASTPHASE) & PHASE_MASK) != P_BUSFREE) &&
(aic_inb(p, SCB_TAG) == scb->hscb->tag) )
{
unpause_sequencer(p, FALSE);
continue;
}
aic7xxx_reset_device(p, scb->cmd->device->id, scb->cmd->device->channel,
scb->cmd->device->lun, scb->hscb->tag);
scb->flags &= ~(SCB_QUEUED_FOR_DONE | SCB_RESET | SCB_ABORT |
SCB_QUEUED_ABORT);
unpause_sequencer(p, FALSE);
}
else if (scb->flags & SCB_ABORT)
{
/*
* We started to abort this, but it completed on us, let it
* through as successful
*/
scb->flags &= ~(SCB_ABORT|SCB_RESET);
}
else if (scb->flags & SCB_SENSE)
{
char *buffer = &scb->cmd->sense_buffer[0];
if (buffer[12] == 0x47 || buffer[12] == 0x54)
{
/*
* Signal that we need to re-negotiate things.
*/
aic_dev->needppr = aic_dev->needppr_copy;
aic_dev->needsdtr = aic_dev->needsdtr_copy;
aic_dev->needwdtr = aic_dev->needwdtr_copy;
}
}
cmd = scb->cmd;
if (scb->hscb->residual_SG_segment_count != 0)
{
aic7xxx_calculate_residual(p, scb);
}
cmd->result |= (aic7xxx_error(cmd) << 16);
aic7xxx_done(p, scb);
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_isr
*
* Description:
* SCSI controller interrupt handler.
*-F*************************************************************************/
static void
aic7xxx_isr(void *dev_id)
{
struct aic7xxx_host *p;
unsigned char intstat;
p = dev_id;
/*
* Just a few sanity checks. Make sure that we have an int pending.
* Also, if PCI, then we are going to check for a PCI bus error status
* should we get too many spurious interrupts.
*/
if (!((intstat = aic_inb(p, INTSTAT)) & INT_PEND))
{
#ifdef CONFIG_PCI
if ( (p->chip & AHC_PCI) && (p->spurious_int > 500) &&
!(p->flags & AHC_HANDLING_REQINITS) )
{
if ( aic_inb(p, ERROR) & PCIERRSTAT )
{
aic7xxx_pci_intr(p);
}
p->spurious_int = 0;
}
else if ( !(p->flags & AHC_HANDLING_REQINITS) )
{
p->spurious_int++;
}
#endif
return;
}
p->spurious_int = 0;
/*
* Keep track of interrupts for /proc/scsi
*/
p->isr_count++;
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if ( (p->isr_count < 16) && (aic7xxx_verbose > 0xffff) &&
(aic7xxx_panic_on_abort) && (p->flags & AHC_PAGESCBS) )
aic7xxx_check_scbs(p, "Bogus settings at start of interrupt.");
#endif
/*
* Handle all the interrupt sources - especially for SCSI
* interrupts, we won't get a second chance at them.
*/
if (intstat & CMDCMPLT)
{
aic7xxx_handle_command_completion_intr(p);
}
if (intstat & BRKADRINT)
{
int i;
unsigned char errno = aic_inb(p, ERROR);
printk(KERN_ERR "(scsi%d) BRKADRINT error(0x%x):\n", p->host_no, errno);
for (i = 0; i < ARRAY_SIZE(hard_error); i++)
{
if (errno & hard_error[i].errno)
{
printk(KERN_ERR " %s\n", hard_error[i].errmesg);
}
}
printk(KERN_ERR "(scsi%d) SEQADDR=0x%x\n", p->host_no,
(((aic_inb(p, SEQADDR1) << 8) & 0x100) | aic_inb(p, SEQADDR0)));
if (aic7xxx_panic_on_abort)
aic7xxx_panic_abort(p, NULL);
#ifdef CONFIG_PCI
if (errno & PCIERRSTAT)
aic7xxx_pci_intr(p);
#endif
if (errno & (SQPARERR | ILLOPCODE | ILLSADDR))
{
panic("aic7xxx: unrecoverable BRKADRINT.\n");
}
if (errno & ILLHADDR)
{
printk(KERN_ERR "(scsi%d) BUG! Driver accessed chip without first "
"pausing controller!\n", p->host_no);
}
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (errno & DPARERR)
{
if (aic_inb(p, DMAPARAMS) & DIRECTION)
printk("(scsi%d) while DMAing SCB from host to card.\n", p->host_no);
else
printk("(scsi%d) while DMAing SCB from card to host.\n", p->host_no);
}
#endif
aic_outb(p, CLRPARERR | CLRBRKADRINT, CLRINT);
unpause_sequencer(p, FALSE);
}
if (intstat & SEQINT)
{
/*
* Read the CCSCBCTL register to work around a bug in the Ultra2 cards
*/
if(p->features & AHC_ULTRA2)
{
aic_inb(p, CCSCBCTL);
}
aic7xxx_handle_seqint(p, intstat);
}
if (intstat & SCSIINT)
{
aic7xxx_handle_scsiint(p, intstat);
}
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if ( (p->isr_count < 16) && (aic7xxx_verbose > 0xffff) &&
(aic7xxx_panic_on_abort) && (p->flags & AHC_PAGESCBS) )
aic7xxx_check_scbs(p, "Bogus settings at end of interrupt.");
#endif
}
/*+F*************************************************************************
* Function:
* do_aic7xxx_isr
*
* Description:
* This is a gross hack to solve a problem in linux kernels 2.1.85 and
* above. Please, children, do not try this at home, and if you ever see
* anything like it, please inform the Gross Hack Police immediately
*-F*************************************************************************/
static irqreturn_t
do_aic7xxx_isr(int irq, void *dev_id)
{
unsigned long cpu_flags;
struct aic7xxx_host *p;
p = dev_id;
if(!p)
return IRQ_NONE;
spin_lock_irqsave(p->host->host_lock, cpu_flags);
p->flags |= AHC_IN_ISR;
do
{
aic7xxx_isr(dev_id);
} while ( (aic_inb(p, INTSTAT) & INT_PEND) );
aic7xxx_done_cmds_complete(p);
aic7xxx_run_waiting_queues(p);
p->flags &= ~AHC_IN_ISR;
spin_unlock_irqrestore(p->host->host_lock, cpu_flags);
return IRQ_HANDLED;
}
/*+F*************************************************************************
* Function:
* aic7xxx_init_transinfo
*
* Description:
* Set up the initial aic_dev values from the BIOS settings and from
* INQUIRY results
*-F*************************************************************************/
static void
aic7xxx_init_transinfo(struct aic7xxx_host *p, struct aic_dev_data *aic_dev)
{
struct scsi_device *sdpnt = aic_dev->SDptr;
unsigned char tindex;
tindex = sdpnt->id | (sdpnt->channel << 3);
if (!(aic_dev->flags & DEVICE_DTR_SCANNED))
{
aic_dev->flags |= DEVICE_DTR_SCANNED;
if ( sdpnt->wdtr && (p->features & AHC_WIDE) )
{
aic_dev->needwdtr = aic_dev->needwdtr_copy = 1;
aic_dev->goal.width = p->user[tindex].width;
}
else
{
aic_dev->needwdtr = aic_dev->needwdtr_copy = 0;
pause_sequencer(p);
aic7xxx_set_width(p, sdpnt->id, sdpnt->channel, sdpnt->lun,
MSG_EXT_WDTR_BUS_8_BIT, (AHC_TRANS_ACTIVE |
AHC_TRANS_GOAL |
AHC_TRANS_CUR), aic_dev );
unpause_sequencer(p, FALSE);
}
if ( sdpnt->sdtr && p->user[tindex].offset )
{
aic_dev->goal.period = p->user[tindex].period;
aic_dev->goal.options = p->user[tindex].options;
if (p->features & AHC_ULTRA2)
aic_dev->goal.offset = MAX_OFFSET_ULTRA2;
else if (aic_dev->goal.width == MSG_EXT_WDTR_BUS_16_BIT)
aic_dev->goal.offset = MAX_OFFSET_16BIT;
else
aic_dev->goal.offset = MAX_OFFSET_8BIT;
if ( sdpnt->ppr && p->user[tindex].period <= 9 &&
p->user[tindex].options )
{
aic_dev->needppr = aic_dev->needppr_copy = 1;
aic_dev->needsdtr = aic_dev->needsdtr_copy = 0;
aic_dev->needwdtr = aic_dev->needwdtr_copy = 0;
aic_dev->flags |= DEVICE_SCSI_3;
}
else
{
aic_dev->needsdtr = aic_dev->needsdtr_copy = 1;
aic_dev->goal.period = max_t(unsigned char, 10, aic_dev->goal.period);
aic_dev->goal.options = 0;
}
}
else
{
aic_dev->needsdtr = aic_dev->needsdtr_copy = 0;
aic_dev->goal.period = 255;
aic_dev->goal.offset = 0;
aic_dev->goal.options = 0;
}
aic_dev->flags |= DEVICE_PRINT_DTR;
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_slave_alloc
*
* Description:
* Set up the initial aic_dev struct pointers
*-F*************************************************************************/
static int
aic7xxx_slave_alloc(struct scsi_device *SDptr)
{
struct aic7xxx_host *p = (struct aic7xxx_host *)SDptr->host->hostdata;
struct aic_dev_data *aic_dev;
aic_dev = kmalloc(sizeof(struct aic_dev_data), GFP_KERNEL);
if(!aic_dev)
return 1;
/*
* Check to see if channel was scanned.
*/
if (!(p->flags & AHC_A_SCANNED) && (SDptr->channel == 0))
{
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(INFO_LEAD "Scanning channel for devices.\n",
p->host_no, 0, -1, -1);
p->flags |= AHC_A_SCANNED;
}
else
{
if (!(p->flags & AHC_B_SCANNED) && (SDptr->channel == 1))
{
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(INFO_LEAD "Scanning channel for devices.\n",
p->host_no, 1, -1, -1);
p->flags |= AHC_B_SCANNED;
}
}
memset(aic_dev, 0, sizeof(struct aic_dev_data));
SDptr->hostdata = aic_dev;
aic_dev->SDptr = SDptr;
aic_dev->max_q_depth = 1;
aic_dev->temp_q_depth = 1;
scbq_init(&aic_dev->delayed_scbs);
INIT_LIST_HEAD(&aic_dev->list);
list_add_tail(&aic_dev->list, &p->aic_devs);
return 0;
}
/*+F*************************************************************************
* Function:
* aic7xxx_device_queue_depth
*
* Description:
* Determines the queue depth for a given device. There are two ways
* a queue depth can be obtained for a tagged queueing device. One
* way is the default queue depth which is determined by whether
* aic7xxx_default_queue_depth. The other is by the aic7xxx_tag_info
* array.
*
* If tagged queueing isn't supported on the device, then we set the
* depth to p->host->hostt->cmd_per_lun for internal driver queueing.
* as the default queue depth. Otherwise, we use either 4 or 8 as the
* default queue depth (dependent on the number of hardware SCBs).
* The other way we determine queue depth is through the use of the
* aic7xxx_tag_info array which is enabled by defining
* AIC7XXX_TAGGED_QUEUEING_BY_DEVICE. This array can be initialized
* with queue depths for individual devices. It also allows tagged
* queueing to be [en|dis]abled for a specific adapter.
*-F*************************************************************************/
static void
aic7xxx_device_queue_depth(struct aic7xxx_host *p, struct scsi_device *device)
{
int tag_enabled = FALSE;
struct aic_dev_data *aic_dev = device->hostdata;
unsigned char tindex;
tindex = device->id | (device->channel << 3);
if (device->simple_tags)
return; // We've already enabled this device
if (device->tagged_supported)
{
tag_enabled = TRUE;
if (!(p->discenable & (1 << tindex)))
{
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
printk(INFO_LEAD "Disconnection disabled, unable to "
"enable tagged queueing.\n",
p->host_no, device->channel, device->id, device->lun);
tag_enabled = FALSE;
}
else
{
if (p->instance >= ARRAY_SIZE(aic7xxx_tag_info))
{
static int print_warning = TRUE;
if(print_warning)
{
printk(KERN_INFO "aic7xxx: WARNING, insufficient tag_info instances for"
" installed controllers.\n");
printk(KERN_INFO "aic7xxx: Please update the aic7xxx_tag_info array in"
" the aic7xxx.c source file.\n");
print_warning = FALSE;
}
aic_dev->max_q_depth = aic_dev->temp_q_depth =
aic7xxx_default_queue_depth;
}
else
{
if (aic7xxx_tag_info[p->instance].tag_commands[tindex] == 255)
{
tag_enabled = FALSE;
}
else if (aic7xxx_tag_info[p->instance].tag_commands[tindex] == 0)
{
aic_dev->max_q_depth = aic_dev->temp_q_depth =
aic7xxx_default_queue_depth;
}
else
{
aic_dev->max_q_depth = aic_dev->temp_q_depth =
aic7xxx_tag_info[p->instance].tag_commands[tindex];
}
}
}
}
if (tag_enabled)
{
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Tagged queuing enabled, queue depth %d.\n",
p->host_no, device->channel, device->id,
device->lun, aic_dev->max_q_depth);
}
scsi_adjust_queue_depth(device, MSG_ORDERED_TAG, aic_dev->max_q_depth);
}
else
{
if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
{
printk(INFO_LEAD "Tagged queuing disabled, queue depth %d.\n",
p->host_no, device->channel, device->id,
device->lun, device->host->cmd_per_lun);
}
scsi_adjust_queue_depth(device, 0, device->host->cmd_per_lun);
}
return;
}
/*+F*************************************************************************
* Function:
* aic7xxx_slave_destroy
*
* Description:
* prepare for this device to go away
*-F*************************************************************************/
static void
aic7xxx_slave_destroy(struct scsi_device *SDptr)
{
struct aic_dev_data *aic_dev = SDptr->hostdata;
list_del(&aic_dev->list);
SDptr->hostdata = NULL;
kfree(aic_dev);
return;
}
/*+F*************************************************************************
* Function:
* aic7xxx_slave_configure
*
* Description:
* Configure the device we are attaching to the controller. This is
* where we get to do things like scan the INQUIRY data, set queue
* depths, allocate command structs, etc.
*-F*************************************************************************/
static int
aic7xxx_slave_configure(struct scsi_device *SDptr)
{
struct aic7xxx_host *p = (struct aic7xxx_host *) SDptr->host->hostdata;
struct aic_dev_data *aic_dev;
int scbnum;
aic_dev = (struct aic_dev_data *)SDptr->hostdata;
aic7xxx_init_transinfo(p, aic_dev);
aic7xxx_device_queue_depth(p, SDptr);
if(list_empty(&aic_dev->list))
list_add_tail(&aic_dev->list, &p->aic_devs);
scbnum = 0;
list_for_each_entry(aic_dev, &p->aic_devs, list) {
scbnum += aic_dev->max_q_depth;
}
while (scbnum > p->scb_data->numscbs)
{
/*
* Pre-allocate the needed SCBs to get around the possibility of having
* to allocate some when memory is more or less exhausted and we need
* the SCB in order to perform a swap operation (possible deadlock)
*/
if ( aic7xxx_allocate_scb(p) == 0 )
break;
}
return(0);
}
/*+F*************************************************************************
* Function:
* aic7xxx_probe
*
* Description:
* Probing for EISA boards: it looks like the first two bytes
* are a manufacturer code - three characters, five bits each:
*
* BYTE 0 BYTE 1 BYTE 2 BYTE 3
* ?1111122 22233333 PPPPPPPP RRRRRRRR
*
* The characters are baselined off ASCII '@', so add that value
* to each to get the real ASCII code for it. The next two bytes
* appear to be a product and revision number, probably vendor-
* specific. This is what is being searched for at each port,
* and what should probably correspond to the ID= field in the
* ECU's .cfg file for the card - if your card is not detected,
* make sure your signature is listed in the array.
*
* The fourth byte's lowest bit seems to be an enabled/disabled
* flag (rest of the bits are reserved?).
*
* NOTE: This function is only needed on Intel and Alpha platforms,
* the other platforms we support don't have EISA/VLB busses. So,
* we #ifdef this entire function to avoid compiler warnings about
* an unused function.
*-F*************************************************************************/
#if defined(__i386__) || defined(__alpha__)
static int
aic7xxx_probe(int slot, int base, ahc_flag_type *flags)
{
int i;
unsigned char buf[4];
static struct {
int n;
unsigned char signature[sizeof(buf)];
ahc_chip type;
int bios_disabled;
} AIC7xxx[] = {
{ 4, { 0x04, 0x90, 0x77, 0x70 },
AHC_AIC7770|AHC_EISA, FALSE }, /* mb 7770 */
{ 4, { 0x04, 0x90, 0x77, 0x71 },
AHC_AIC7770|AHC_EISA, FALSE }, /* host adapter 274x */
{ 4, { 0x04, 0x90, 0x77, 0x56 },
AHC_AIC7770|AHC_VL, FALSE }, /* 284x BIOS enabled */
{ 4, { 0x04, 0x90, 0x77, 0x57 },
AHC_AIC7770|AHC_VL, TRUE } /* 284x BIOS disabled */
};
/*
* The VL-bus cards need to be primed by
* writing before a signature check.
*/
for (i = 0; i < sizeof(buf); i++)
{
outb(0x80 + i, base);
buf[i] = inb(base + i);
}
for (i = 0; i < ARRAY_SIZE(AIC7xxx); i++)
{
/*
* Signature match on enabled card?
*/
if (!memcmp(buf, AIC7xxx[i].signature, AIC7xxx[i].n))
{
if (inb(base + 4) & 1)
{
if (AIC7xxx[i].bios_disabled)
{
*flags |= AHC_USEDEFAULTS;
}
else
{
*flags |= AHC_BIOS_ENABLED;
}
return (i);
}
printk("aic7xxx: <Adaptec 7770 SCSI Host Adapter> "
"disabled at slot %d, ignored.\n", slot);
}
}
return (-1);
}
#endif /* (__i386__) || (__alpha__) */
/*+F*************************************************************************
* Function:
* read_2840_seeprom
*
* Description:
* Reads the 2840 serial EEPROM and returns 1 if successful and 0 if
* not successful.
*
* See read_seeprom (for the 2940) for the instruction set of the 93C46
* chip.
*
* The 2840 interface to the 93C46 serial EEPROM is through the
* STATUS_2840 and SEECTL_2840 registers. The CS_2840, CK_2840, and
* DO_2840 bits of the SEECTL_2840 register are connected to the chip
* select, clock, and data out lines respectively of the serial EEPROM.
* The DI_2840 bit of the STATUS_2840 is connected to the data in line
* of the serial EEPROM. The EEPROM_TF bit of STATUS_2840 register is
* useful in that it gives us an 800 nsec timer. After a read from the
* SEECTL_2840 register the timing flag is cleared and goes high 800 nsec
* later.
*-F*************************************************************************/
static int
read_284x_seeprom(struct aic7xxx_host *p, struct seeprom_config *sc)
{
int i = 0, k = 0;
unsigned char temp;
unsigned short checksum = 0;
unsigned short *seeprom = (unsigned short *) sc;
struct seeprom_cmd {
unsigned char len;
unsigned char bits[3];
};
struct seeprom_cmd seeprom_read = {3, {1, 1, 0}};
#define CLOCK_PULSE(p) \
while ((aic_inb(p, STATUS_2840) & EEPROM_TF) == 0) \
{ \
; /* Do nothing */ \
} \
(void) aic_inb(p, SEECTL_2840);
/*
* Read the first 32 registers of the seeprom. For the 2840,
* the 93C46 SEEPROM is a 1024-bit device with 64 16-bit registers
* but only the first 32 are used by Adaptec BIOS. The loop
* will range from 0 to 31.
*/
for (k = 0; k < (sizeof(*sc) / 2); k++)
{
/*
* Send chip select for one clock cycle.
*/
aic_outb(p, CK_2840 | CS_2840, SEECTL_2840);
CLOCK_PULSE(p);
/*
* Now we're ready to send the read command followed by the
* address of the 16-bit register we want to read.
*/
for (i = 0; i < seeprom_read.len; i++)
{
temp = CS_2840 | seeprom_read.bits[i];
aic_outb(p, temp, SEECTL_2840);
CLOCK_PULSE(p);
temp = temp ^ CK_2840;
aic_outb(p, temp, SEECTL_2840);
CLOCK_PULSE(p);
}
/*
* Send the 6 bit address (MSB first, LSB last).
*/
for (i = 5; i >= 0; i--)
{
temp = k;
temp = (temp >> i) & 1; /* Mask out all but lower bit. */
temp = CS_2840 | temp;
aic_outb(p, temp, SEECTL_2840);
CLOCK_PULSE(p);
temp = temp ^ CK_2840;
aic_outb(p, temp, SEECTL_2840);
CLOCK_PULSE(p);
}
/*
* Now read the 16 bit register. An initial 0 precedes the
* register contents which begins with bit 15 (MSB) and ends
* with bit 0 (LSB). The initial 0 will be shifted off the
* top of our word as we let the loop run from 0 to 16.
*/
for (i = 0; i <= 16; i++)
{
temp = CS_2840;
aic_outb(p, temp, SEECTL_2840);
CLOCK_PULSE(p);
temp = temp ^ CK_2840;
seeprom[k] = (seeprom[k] << 1) | (aic_inb(p, STATUS_2840) & DI_2840);
aic_outb(p, temp, SEECTL_2840);
CLOCK_PULSE(p);
}
/*
* The serial EEPROM has a checksum in the last word. Keep a
* running checksum for all words read except for the last
* word. We'll verify the checksum after all words have been
* read.
*/
if (k < (sizeof(*sc) / 2) - 1)
{
checksum = checksum + seeprom[k];
}
/*
* Reset the chip select for the next command cycle.
*/
aic_outb(p, 0, SEECTL_2840);
CLOCK_PULSE(p);
aic_outb(p, CK_2840, SEECTL_2840);
CLOCK_PULSE(p);
aic_outb(p, 0, SEECTL_2840);
CLOCK_PULSE(p);
}
#if 0
printk("Computed checksum 0x%x, checksum read 0x%x\n", checksum, sc->checksum);
printk("Serial EEPROM:");
for (k = 0; k < (sizeof(*sc) / 2); k++)
{
if (((k % 8) == 0) && (k != 0))
{
printk("\n ");
}
printk(" 0x%x", seeprom[k]);
}
printk("\n");
#endif
if (checksum != sc->checksum)
{
printk("aic7xxx: SEEPROM checksum error, ignoring SEEPROM settings.\n");
return (0);
}
return (1);
#undef CLOCK_PULSE
}
#define CLOCK_PULSE(p) \
do { \
int limit = 0; \
do { \
mb(); \
pause_sequencer(p); /* This is just to generate some PCI */ \
/* traffic so the PCI read is flushed */ \
/* it shouldn't be needed, but some */ \
/* chipsets do indeed appear to need */ \
/* something to force PCI reads to get */ \
/* flushed */ \
udelay(1); /* Do nothing */ \
} while (((aic_inb(p, SEECTL) & SEERDY) == 0) && (++limit < 1000)); \
} while(0)
/*+F*************************************************************************
* Function:
* acquire_seeprom
*
* Description:
* Acquires access to the memory port on PCI controllers.
*-F*************************************************************************/
static int
acquire_seeprom(struct aic7xxx_host *p)
{
/*
* Request access of the memory port. When access is
* granted, SEERDY will go high. We use a 1 second
* timeout which should be near 1 second more than
* is needed. Reason: after the 7870 chip reset, there
* should be no contention.
*/
aic_outb(p, SEEMS, SEECTL);
CLOCK_PULSE(p);
if ((aic_inb(p, SEECTL) & SEERDY) == 0)
{
aic_outb(p, 0, SEECTL);
return (0);
}
return (1);
}
/*+F*************************************************************************
* Function:
* release_seeprom
*
* Description:
* Releases access to the memory port on PCI controllers.
*-F*************************************************************************/
static void
release_seeprom(struct aic7xxx_host *p)
{
/*
* Make sure the SEEPROM is ready before we release it.
*/
CLOCK_PULSE(p);
aic_outb(p, 0, SEECTL);
}
/*+F*************************************************************************
* Function:
* read_seeprom
*
* Description:
* Reads the serial EEPROM and returns 1 if successful and 0 if
* not successful.
*
* The instruction set of the 93C46/56/66 chips is as follows:
*
* Start OP
* Function Bit Code Address Data Description
* -------------------------------------------------------------------
* READ 1 10 A5 - A0 Reads data stored in memory,
* starting at specified address
* EWEN 1 00 11XXXX Write enable must precede
* all programming modes
* ERASE 1 11 A5 - A0 Erase register A5A4A3A2A1A0
* WRITE 1 01 A5 - A0 D15 - D0 Writes register
* ERAL 1 00 10XXXX Erase all registers
* WRAL 1 00 01XXXX D15 - D0 Writes to all registers
* EWDS 1 00 00XXXX Disables all programming
* instructions
* *Note: A value of X for address is a don't care condition.
* *Note: The 93C56 and 93C66 have 8 address bits.
*
*
* The 93C46 has a four wire interface: clock, chip select, data in, and
* data out. In order to perform one of the above functions, you need
* to enable the chip select for a clock period (typically a minimum of
* 1 usec, with the clock high and low a minimum of 750 and 250 nsec
* respectively. While the chip select remains high, you can clock in
* the instructions (above) starting with the start bit, followed by the
* OP code, Address, and Data (if needed). For the READ instruction, the
* requested 16-bit register contents is read from the data out line but
* is preceded by an initial zero (leading 0, followed by 16-bits, MSB
* first). The clock cycling from low to high initiates the next data
* bit to be sent from the chip.
*
* The 78xx interface to the 93C46 serial EEPROM is through the SEECTL
* register. After successful arbitration for the memory port, the
* SEECS bit of the SEECTL register is connected to the chip select.
* The SEECK, SEEDO, and SEEDI are connected to the clock, data out,
* and data in lines respectively. The SEERDY bit of SEECTL is useful
* in that it gives us an 800 nsec timer. After a write to the SEECTL
* register, the SEERDY goes high 800 nsec later. The one exception
* to this is when we first request access to the memory port. The
* SEERDY goes high to signify that access has been granted and, for
* this case, has no implied timing.
*-F*************************************************************************/
static int
read_seeprom(struct aic7xxx_host *p, int offset,
unsigned short *scarray, unsigned int len, seeprom_chip_type chip)
{
int i = 0, k;
unsigned char temp;
unsigned short checksum = 0;
struct seeprom_cmd {
unsigned char len;
unsigned char bits[3];
};
struct seeprom_cmd seeprom_read = {3, {1, 1, 0}};
/*
* Request access of the memory port.
*/
if (acquire_seeprom(p) == 0)
{
return (0);
}
/*
* Read 'len' registers of the seeprom. For the 7870, the 93C46
* SEEPROM is a 1024-bit device with 64 16-bit registers but only
* the first 32 are used by Adaptec BIOS. Some adapters use the
* 93C56 SEEPROM which is a 2048-bit device. The loop will range
* from 0 to 'len' - 1.
*/
for (k = 0; k < len; k++)
{
/*
* Send chip select for one clock cycle.
*/
aic_outb(p, SEEMS | SEECK | SEECS, SEECTL);
CLOCK_PULSE(p);
/*
* Now we're ready to send the read command followed by the
* address of the 16-bit register we want to read.
*/
for (i = 0; i < seeprom_read.len; i++)
{
temp = SEEMS | SEECS | (seeprom_read.bits[i] << 1);
aic_outb(p, temp, SEECTL);
CLOCK_PULSE(p);
temp = temp ^ SEECK;
aic_outb(p, temp, SEECTL);
CLOCK_PULSE(p);
}
/*
* Send the 6 or 8 bit address (MSB first, LSB last).
*/
for (i = ((int) chip - 1); i >= 0; i--)
{
temp = k + offset;
temp = (temp >> i) & 1; /* Mask out all but lower bit. */
temp = SEEMS | SEECS | (temp << 1);
aic_outb(p, temp, SEECTL);
CLOCK_PULSE(p);
temp = temp ^ SEECK;
aic_outb(p, temp, SEECTL);
CLOCK_PULSE(p);
}
/*
* Now read the 16 bit register. An initial 0 precedes the
* register contents which begins with bit 15 (MSB) and ends
* with bit 0 (LSB). The initial 0 will be shifted off the
* top of our word as we let the loop run from 0 to 16.
*/
for (i = 0; i <= 16; i++)
{
temp = SEEMS | SEECS;
aic_outb(p, temp, SEECTL);
CLOCK_PULSE(p);
temp = temp ^ SEECK;
scarray[k] = (scarray[k] << 1) | (aic_inb(p, SEECTL) & SEEDI);
aic_outb(p, temp, SEECTL);
CLOCK_PULSE(p);
}
/*
* The serial EEPROM should have a checksum in the last word.
* Keep a running checksum for all words read except for the
* last word. We'll verify the checksum after all words have
* been read.
*/
if (k < (len - 1))
{
checksum = checksum + scarray[k];
}
/*
* Reset the chip select for the next command cycle.
*/
aic_outb(p, SEEMS, SEECTL);
CLOCK_PULSE(p);
aic_outb(p, SEEMS | SEECK, SEECTL);
CLOCK_PULSE(p);
aic_outb(p, SEEMS, SEECTL);
CLOCK_PULSE(p);
}
/*
* Release access to the memory port and the serial EEPROM.
*/
release_seeprom(p);
#if 0
printk("Computed checksum 0x%x, checksum read 0x%x\n",
checksum, scarray[len - 1]);
printk("Serial EEPROM:");
for (k = 0; k < len; k++)
{
if (((k % 8) == 0) && (k != 0))
{
printk("\n ");
}
printk(" 0x%x", scarray[k]);
}
printk("\n");
#endif
if ( (checksum != scarray[len - 1]) || (checksum == 0) )
{
return (0);
}
return (1);
}
/*+F*************************************************************************
* Function:
* read_brdctl
*
* Description:
* Reads the BRDCTL register.
*-F*************************************************************************/
static unsigned char
read_brdctl(struct aic7xxx_host *p)
{
unsigned char brdctl, value;
/*
* Make sure the SEEPROM is ready before we access it
*/
CLOCK_PULSE(p);
if (p->features & AHC_ULTRA2)
{
brdctl = BRDRW_ULTRA2;
aic_outb(p, brdctl, BRDCTL);
CLOCK_PULSE(p);
value = aic_inb(p, BRDCTL);
CLOCK_PULSE(p);
return(value);
}
brdctl = BRDRW;
if ( !((p->chip & AHC_CHIPID_MASK) == AHC_AIC7895) ||
(p->flags & AHC_CHNLB) )
{
brdctl |= BRDCS;
}
aic_outb(p, brdctl, BRDCTL);
CLOCK_PULSE(p);
value = aic_inb(p, BRDCTL);
CLOCK_PULSE(p);
aic_outb(p, 0, BRDCTL);
CLOCK_PULSE(p);
return (value);
}
/*+F*************************************************************************
* Function:
* write_brdctl
*
* Description:
* Writes a value to the BRDCTL register.
*-F*************************************************************************/
static void
write_brdctl(struct aic7xxx_host *p, unsigned char value)
{
unsigned char brdctl;
/*
* Make sure the SEEPROM is ready before we access it
*/
CLOCK_PULSE(p);
if (p->features & AHC_ULTRA2)
{
brdctl = value;
aic_outb(p, brdctl, BRDCTL);
CLOCK_PULSE(p);
brdctl |= BRDSTB_ULTRA2;
aic_outb(p, brdctl, BRDCTL);
CLOCK_PULSE(p);
brdctl &= ~BRDSTB_ULTRA2;
aic_outb(p, brdctl, BRDCTL);
CLOCK_PULSE(p);
read_brdctl(p);
CLOCK_PULSE(p);
}
else
{
brdctl = BRDSTB;
if ( !((p->chip & AHC_CHIPID_MASK) == AHC_AIC7895) ||
(p->flags & AHC_CHNLB) )
{
brdctl |= BRDCS;
}
brdctl = BRDSTB | BRDCS;
aic_outb(p, brdctl, BRDCTL);
CLOCK_PULSE(p);
brdctl |= value;
aic_outb(p, brdctl, BRDCTL);
CLOCK_PULSE(p);
brdctl &= ~BRDSTB;
aic_outb(p, brdctl, BRDCTL);
CLOCK_PULSE(p);
brdctl &= ~BRDCS;
aic_outb(p, brdctl, BRDCTL);
CLOCK_PULSE(p);
}
}
/*+F*************************************************************************
* Function:
* aic785x_cable_detect
*
* Description:
* Detect the cables that are present on aic785x class controller chips
*-F*************************************************************************/
static void
aic785x_cable_detect(struct aic7xxx_host *p, int *int_50,
int *ext_present, int *eeprom)
{
unsigned char brdctl;
aic_outb(p, BRDRW | BRDCS, BRDCTL);
CLOCK_PULSE(p);
aic_outb(p, 0, BRDCTL);
CLOCK_PULSE(p);
brdctl = aic_inb(p, BRDCTL);
CLOCK_PULSE(p);
*int_50 = !(brdctl & BRDDAT5);
*ext_present = !(brdctl & BRDDAT6);
*eeprom = (aic_inb(p, SPIOCAP) & EEPROM);
}
#undef CLOCK_PULSE
/*+F*************************************************************************
* Function:
* aic2940_uwpro_cable_detect
*
* Description:
* Detect the cables that are present on the 2940-UWPro cards
*
* NOTE: This function assumes the SEEPROM will have already been acquired
* prior to invocation of this function.
*-F*************************************************************************/
static void
aic2940_uwpro_wide_cable_detect(struct aic7xxx_host *p, int *int_68,
int *ext_68, int *eeprom)
{
unsigned char brdctl;
/*
* First read the status of our cables. Set the rom bank to
* 0 since the bank setting serves as a multiplexor for the
* cable detection logic. BRDDAT5 controls the bank switch.
*/
write_brdctl(p, 0);
/*
* Now we read the state of the internal 68 connector. BRDDAT6
* is don't care, BRDDAT7 is internal 68. The cable is
* present if the bit is 0
*/
brdctl = read_brdctl(p);
*int_68 = !(brdctl & BRDDAT7);
/*
* Set the bank bit in brdctl and then read the external cable state
* and the EEPROM status
*/
write_brdctl(p, BRDDAT5);
brdctl = read_brdctl(p);
*ext_68 = !(brdctl & BRDDAT6);
*eeprom = !(brdctl & BRDDAT7);
/*
* We're done, the calling function will release the SEEPROM for us
*/
}
/*+F*************************************************************************
* Function:
* aic787x_cable_detect
*
* Description:
* Detect the cables that are present on aic787x class controller chips
*
* NOTE: This function assumes the SEEPROM will have already been acquired
* prior to invocation of this function.
*-F*************************************************************************/
static void
aic787x_cable_detect(struct aic7xxx_host *p, int *int_50, int *int_68,
int *ext_present, int *eeprom)
{
unsigned char brdctl;
/*
* First read the status of our cables. Set the rom bank to
* 0 since the bank setting serves as a multiplexor for the
* cable detection logic. BRDDAT5 controls the bank switch.
*/
write_brdctl(p, 0);
/*
* Now we read the state of the two internal connectors. BRDDAT6
* is internal 50, BRDDAT7 is internal 68. For each, the cable is
* present if the bit is 0
*/
brdctl = read_brdctl(p);
*int_50 = !(brdctl & BRDDAT6);
*int_68 = !(brdctl & BRDDAT7);
/*
* Set the bank bit in brdctl and then read the external cable state
* and the EEPROM status
*/
write_brdctl(p, BRDDAT5);
brdctl = read_brdctl(p);
*ext_present = !(brdctl & BRDDAT6);
*eeprom = !(brdctl & BRDDAT7);
/*
* We're done, the calling function will release the SEEPROM for us
*/
}
/*+F*************************************************************************
* Function:
* aic787x_ultra2_term_detect
*
* Description:
* Detect the termination settings present on ultra2 class controllers
*
* NOTE: This function assumes the SEEPROM will have already been acquired
* prior to invocation of this function.
*-F*************************************************************************/
static void
aic7xxx_ultra2_term_detect(struct aic7xxx_host *p, int *enableSE_low,
int *enableSE_high, int *enableLVD_low,
int *enableLVD_high, int *eprom_present)
{
unsigned char brdctl;
brdctl = read_brdctl(p);
*eprom_present = (brdctl & BRDDAT7);
*enableSE_high = (brdctl & BRDDAT6);
*enableSE_low = (brdctl & BRDDAT5);
*enableLVD_high = (brdctl & BRDDAT4);
*enableLVD_low = (brdctl & BRDDAT3);
}
/*+F*************************************************************************
* Function:
* configure_termination
*
* Description:
* Configures the termination settings on PCI adapters that have
* SEEPROMs available.
*-F*************************************************************************/
static void
configure_termination(struct aic7xxx_host *p)
{
int internal50_present = 0;
int internal68_present = 0;
int external_present = 0;
int eprom_present = 0;
int enableSE_low = 0;
int enableSE_high = 0;
int enableLVD_low = 0;
int enableLVD_high = 0;
unsigned char brddat = 0;
unsigned char max_target = 0;
unsigned char sxfrctl1 = aic_inb(p, SXFRCTL1);
if (acquire_seeprom(p))
{
if (p->features & (AHC_WIDE|AHC_TWIN))
max_target = 16;
else
max_target = 8;
aic_outb(p, SEEMS | SEECS, SEECTL);
sxfrctl1 &= ~STPWEN;
/*
* The termination/cable detection logic is split into three distinct
* groups. Ultra2 and later controllers, 2940UW-Pro controllers, and
* older 7850, 7860, 7870, 7880, and 7895 controllers. Each has its
* own unique way of detecting their cables and writing the results
* back to the card.
*/
if (p->features & AHC_ULTRA2)
{
/*
* As long as user hasn't overridden term settings, always check the
* cable detection logic
*/
if (aic7xxx_override_term == -1)
{
aic7xxx_ultra2_term_detect(p, &enableSE_low, &enableSE_high,
&enableLVD_low, &enableLVD_high,
&eprom_present);
}
/*
* If the user is overriding settings, then they have been preserved
* to here as fake adapter_control entries. Parse them and allow
* them to override the detected settings (if we even did detection).
*/
if (!(p->adapter_control & CFSEAUTOTERM))
{
enableSE_low = (p->adapter_control & CFSTERM);
enableSE_high = (p->adapter_control & CFWSTERM);
}
if (!(p->adapter_control & CFAUTOTERM))
{
enableLVD_low = enableLVD_high = (p->adapter_control & CFLVDSTERM);
}
/*
* Now take those settings that we have and translate them into the
* values that must be written into the registers.
*
* Flash Enable = BRDDAT7
* Secondary High Term Enable = BRDDAT6
* Secondary Low Term Enable = BRDDAT5
* LVD/Primary High Term Enable = BRDDAT4
* LVD/Primary Low Term Enable = STPWEN bit in SXFRCTL1
*/
if (enableLVD_low != 0)
{
sxfrctl1 |= STPWEN;
p->flags |= AHC_TERM_ENB_LVD;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) LVD/Primary Low byte termination "
"Enabled\n", p->host_no);
}
if (enableLVD_high != 0)
{
brddat |= BRDDAT4;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) LVD/Primary High byte termination "
"Enabled\n", p->host_no);
}
if (enableSE_low != 0)
{
brddat |= BRDDAT5;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) Secondary Low byte termination "
"Enabled\n", p->host_no);
}
if (enableSE_high != 0)
{
brddat |= BRDDAT6;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) Secondary High byte termination "
"Enabled\n", p->host_no);
}
}
else if (p->features & AHC_NEW_AUTOTERM)
{
/*
* The 50 pin connector termination is controlled by STPWEN in the
* SXFRCTL1 register. Since the Adaptec docs typically say the
* controller is not allowed to be in the middle of a cable and
* this is the only connection on that stub of the bus, there is
* no need to even check for narrow termination, it's simply
* always on.
*/
sxfrctl1 |= STPWEN;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) Narrow channel termination Enabled\n",
p->host_no);
if (p->adapter_control & CFAUTOTERM)
{
aic2940_uwpro_wide_cable_detect(p, &internal68_present,
&external_present,
&eprom_present);
printk(KERN_INFO "(scsi%d) Cables present (Int-50 %s, Int-68 %s, "
"Ext-68 %s)\n", p->host_no,
"Don't Care",
internal68_present ? "YES" : "NO",
external_present ? "YES" : "NO");
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) EEPROM %s present.\n", p->host_no,
eprom_present ? "is" : "is not");
if (internal68_present && external_present)
{
brddat = 0;
p->flags &= ~AHC_TERM_ENB_SE_HIGH;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) Wide channel termination Disabled\n",
p->host_no);
}
else
{
brddat = BRDDAT6;
p->flags |= AHC_TERM_ENB_SE_HIGH;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) Wide channel termination Enabled\n",
p->host_no);
}
}
else
{
/*
* The termination of the Wide channel is done more like normal
* though, and the setting of this termination is done by writing
* either a 0 or 1 to BRDDAT6 of the BRDDAT register
*/
if (p->adapter_control & CFWSTERM)
{
brddat = BRDDAT6;
p->flags |= AHC_TERM_ENB_SE_HIGH;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) Wide channel termination Enabled\n",
p->host_no);
}
else
{
brddat = 0;
}
}
}
else
{
if (p->adapter_control & CFAUTOTERM)
{
if (p->flags & AHC_MOTHERBOARD)
{
printk(KERN_INFO "(scsi%d) Warning - detected auto-termination\n",
p->host_no);
printk(KERN_INFO "(scsi%d) Please verify driver detected settings "
"are correct.\n", p->host_no);
printk(KERN_INFO "(scsi%d) If not, then please properly set the "
"device termination\n", p->host_no);
printk(KERN_INFO "(scsi%d) in the Adaptec SCSI BIOS by hitting "
"CTRL-A when prompted\n", p->host_no);
printk(KERN_INFO "(scsi%d) during machine bootup.\n", p->host_no);
}
/* Configure auto termination. */
if ( (p->chip & AHC_CHIPID_MASK) >= AHC_AIC7870 )
{
aic787x_cable_detect(p, &internal50_present, &internal68_present,
&external_present, &eprom_present);
}
else
{
aic785x_cable_detect(p, &internal50_present, &external_present,
&eprom_present);
}
if (max_target <= 8)
internal68_present = 0;
if (max_target > 8)
{
printk(KERN_INFO "(scsi%d) Cables present (Int-50 %s, Int-68 %s, "
"Ext-68 %s)\n", p->host_no,
internal50_present ? "YES" : "NO",
internal68_present ? "YES" : "NO",
external_present ? "YES" : "NO");
}
else
{
printk(KERN_INFO "(scsi%d) Cables present (Int-50 %s, Ext-50 %s)\n",
p->host_no,
internal50_present ? "YES" : "NO",
external_present ? "YES" : "NO");
}
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) EEPROM %s present.\n", p->host_no,
eprom_present ? "is" : "is not");
/*
* Now set the termination based on what we found. BRDDAT6
* controls wide termination enable.
* Flash Enable = BRDDAT7
* SE High Term Enable = BRDDAT6
*/
if (internal50_present && internal68_present && external_present)
{
printk(KERN_INFO "(scsi%d) Illegal cable configuration!! Only two\n",
p->host_no);
printk(KERN_INFO "(scsi%d) connectors on the SCSI controller may be "
"in use at a time!\n", p->host_no);
/*
* Force termination (low and high byte) on. This is safer than
* leaving it completely off, especially since this message comes
* most often from motherboard controllers that don't even have 3
* connectors, but instead are failing the cable detection.
*/
internal50_present = external_present = 0;
enableSE_high = enableSE_low = 1;
}
if ((max_target > 8) &&
((external_present == 0) || (internal68_present == 0)) )
{
brddat |= BRDDAT6;
p->flags |= AHC_TERM_ENB_SE_HIGH;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) SE High byte termination Enabled\n",
p->host_no);
}
if ( ((internal50_present ? 1 : 0) +
(internal68_present ? 1 : 0) +
(external_present ? 1 : 0)) <= 1 )
{
sxfrctl1 |= STPWEN;
p->flags |= AHC_TERM_ENB_SE_LOW;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) SE Low byte termination Enabled\n",
p->host_no);
}
}
else /* p->adapter_control & CFAUTOTERM */
{
if (p->adapter_control & CFSTERM)
{
sxfrctl1 |= STPWEN;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) SE Low byte termination Enabled\n",
p->host_no);
}
if (p->adapter_control & CFWSTERM)
{
brddat |= BRDDAT6;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) SE High byte termination Enabled\n",
p->host_no);
}
}
}
aic_outb(p, sxfrctl1, SXFRCTL1);
write_brdctl(p, brddat);
release_seeprom(p);
}
}
/*+F*************************************************************************
* Function:
* detect_maxscb
*
* Description:
* Detects the maximum number of SCBs for the controller and returns
* the count and a mask in p (p->maxscbs, p->qcntmask).
*-F*************************************************************************/
static void
detect_maxscb(struct aic7xxx_host *p)
{
int i;
/*
* It's possible that we've already done this for multichannel
* adapters.
*/
if (p->scb_data->maxhscbs == 0)
{
/*
* We haven't initialized the SCB settings yet. Walk the SCBs to
* determince how many there are.
*/
aic_outb(p, 0, FREE_SCBH);
for (i = 0; i < AIC7XXX_MAXSCB; i++)
{
aic_outb(p, i, SCBPTR);
aic_outb(p, i, SCB_CONTROL);
if (aic_inb(p, SCB_CONTROL) != i)
break;
aic_outb(p, 0, SCBPTR);
if (aic_inb(p, SCB_CONTROL) != 0)
break;
aic_outb(p, i, SCBPTR);
aic_outb(p, 0, SCB_CONTROL); /* Clear the control byte. */
aic_outb(p, i + 1, SCB_NEXT); /* Set the next pointer. */
aic_outb(p, SCB_LIST_NULL, SCB_TAG); /* Make the tag invalid. */
aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS); /* no busy untagged */
aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS+1);/* targets active yet */
aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS+2);
aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS+3);
}
/* Make sure the last SCB terminates the free list. */
aic_outb(p, i - 1, SCBPTR);
aic_outb(p, SCB_LIST_NULL, SCB_NEXT);
/* Ensure we clear the first (0) SCBs control byte. */
aic_outb(p, 0, SCBPTR);
aic_outb(p, 0, SCB_CONTROL);
p->scb_data->maxhscbs = i;
/*
* Use direct indexing instead for speed
*/
if ( i == AIC7XXX_MAXSCB )
p->flags &= ~AHC_PAGESCBS;
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_register
*
* Description:
* Register a Adaptec aic7xxx chip SCSI controller with the kernel.
*-F*************************************************************************/
static int
aic7xxx_register(struct scsi_host_template *template, struct aic7xxx_host *p,
int reset_delay)
{
int i, result;
int max_targets;
int found = 1;
unsigned char term, scsi_conf;
struct Scsi_Host *host;
host = p->host;
p->scb_data->maxscbs = AIC7XXX_MAXSCB;
host->can_queue = AIC7XXX_MAXSCB;
host->cmd_per_lun = 3;
host->sg_tablesize = AIC7XXX_MAX_SG;
host->this_id = p->scsi_id;
host->io_port = p->base;
host->n_io_port = 0xFF;
host->base = p->mbase;
host->irq = p->irq;
if (p->features & AHC_WIDE)
{
host->max_id = 16;
}
if (p->features & AHC_TWIN)
{
host->max_channel = 1;
}
p->host = host;
p->host_no = host->host_no;
host->unique_id = p->instance;
p->isr_count = 0;
p->next = NULL;
p->completeq.head = NULL;
p->completeq.tail = NULL;
scbq_init(&p->scb_data->free_scbs);
scbq_init(&p->waiting_scbs);
INIT_LIST_HEAD(&p->aic_devs);
/*
* We currently have no commands of any type
*/
p->qinfifonext = 0;
p->qoutfifonext = 0;
printk(KERN_INFO "(scsi%d) <%s> found at ", p->host_no,
board_names[p->board_name_index]);
switch(p->chip)
{
case (AHC_AIC7770|AHC_EISA):
printk("EISA slot %d\n", p->pci_device_fn);
break;
case (AHC_AIC7770|AHC_VL):
printk("VLB slot %d\n", p->pci_device_fn);
break;
default:
printk("PCI %d/%d/%d\n", p->pci_bus, PCI_SLOT(p->pci_device_fn),
PCI_FUNC(p->pci_device_fn));
break;
}
if (p->features & AHC_TWIN)
{
printk(KERN_INFO "(scsi%d) Twin Channel, A SCSI ID %d, B SCSI ID %d, ",
p->host_no, p->scsi_id, p->scsi_id_b);
}
else
{
char *channel;
channel = "";
if ((p->flags & AHC_MULTI_CHANNEL) != 0)
{
channel = " A";
if ( (p->flags & (AHC_CHNLB|AHC_CHNLC)) != 0 )
{
channel = (p->flags & AHC_CHNLB) ? " B" : " C";
}
}
if (p->features & AHC_WIDE)
{
printk(KERN_INFO "(scsi%d) Wide ", p->host_no);
}
else
{
printk(KERN_INFO "(scsi%d) Narrow ", p->host_no);
}
printk("Channel%s, SCSI ID=%d, ", channel, p->scsi_id);
}
aic_outb(p, 0, SEQ_FLAGS);
detect_maxscb(p);
printk("%d/%d SCBs\n", p->scb_data->maxhscbs, p->scb_data->maxscbs);
if (aic7xxx_verbose & VERBOSE_PROBE2)
{
printk(KERN_INFO "(scsi%d) BIOS %sabled, IO Port 0x%lx, IRQ %d\n",
p->host_no, (p->flags & AHC_BIOS_ENABLED) ? "en" : "dis",
p->base, p->irq);
printk(KERN_INFO "(scsi%d) IO Memory at 0x%lx, MMAP Memory at %p\n",
p->host_no, p->mbase, p->maddr);
}
#ifdef CONFIG_PCI
/*
* Now that we know our instance number, we can set the flags we need to
* force termination if need be.
*/
if (aic7xxx_stpwlev != -1)
{
/*
* This option only applies to PCI controllers.
*/
if ( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI)
{
unsigned char devconfig;
pci_read_config_byte(p->pdev, DEVCONFIG, &devconfig);
if ( (aic7xxx_stpwlev >> p->instance) & 0x01 )
{
devconfig |= STPWLEVEL;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk("(scsi%d) Force setting STPWLEVEL bit\n", p->host_no);
}
else
{
devconfig &= ~STPWLEVEL;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk("(scsi%d) Force clearing STPWLEVEL bit\n", p->host_no);
}
pci_write_config_byte(p->pdev, DEVCONFIG, devconfig);
}
}
#endif
/*
* That took care of devconfig and stpwlev, now for the actual termination
* settings.
*/
if (aic7xxx_override_term != -1)
{
/*
* Again, this only applies to PCI controllers. We don't have problems
* with the termination on 274x controllers to the best of my knowledge.
*/
if ( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI)
{
unsigned char term_override;
term_override = ( (aic7xxx_override_term >> (p->instance * 4)) & 0x0f);
p->adapter_control &=
~(CFSTERM|CFWSTERM|CFLVDSTERM|CFAUTOTERM|CFSEAUTOTERM);
if ( (p->features & AHC_ULTRA2) && (term_override & 0x0c) )
{
p->adapter_control |= CFLVDSTERM;
}
if (term_override & 0x02)
{
p->adapter_control |= CFWSTERM;
}
if (term_override & 0x01)
{
p->adapter_control |= CFSTERM;
}
}
}
if ( (p->flags & AHC_SEEPROM_FOUND) || (aic7xxx_override_term != -1) )
{
if (p->features & AHC_SPIOCAP)
{
if ( aic_inb(p, SPIOCAP) & SSPIOCPS )
/*
* Update the settings in sxfrctl1 to match the termination
* settings.
*/
configure_termination(p);
}
else if ((p->chip & AHC_CHIPID_MASK) >= AHC_AIC7870)
{
configure_termination(p);
}
}
/*
* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels
*/
if (p->features & AHC_TWIN)
{
/* Select channel B */
aic_outb(p, aic_inb(p, SBLKCTL) | SELBUSB, SBLKCTL);
if ((p->flags & AHC_SEEPROM_FOUND) || (aic7xxx_override_term != -1))
term = (aic_inb(p, SXFRCTL1) & STPWEN);
else
term = ((p->flags & AHC_TERM_ENB_B) ? STPWEN : 0);
aic_outb(p, p->scsi_id_b, SCSIID);
scsi_conf = aic_inb(p, SCSICONF + 1);
aic_outb(p, DFON | SPIOEN, SXFRCTL0);
aic_outb(p, (scsi_conf & ENSPCHK) | aic7xxx_seltime | term |
ENSTIMER | ACTNEGEN, SXFRCTL1);
aic_outb(p, 0, SIMODE0);
aic_outb(p, ENSELTIMO | ENSCSIRST | ENSCSIPERR, SIMODE1);
aic_outb(p, 0, SCSIRATE);
/* Select channel A */
aic_outb(p, aic_inb(p, SBLKCTL) & ~SELBUSB, SBLKCTL);
}
if (p->features & AHC_ULTRA2)
{
aic_outb(p, p->scsi_id, SCSIID_ULTRA2);
}
else
{
aic_outb(p, p->scsi_id, SCSIID);
}
if ((p->flags & AHC_SEEPROM_FOUND) || (aic7xxx_override_term != -1))
term = (aic_inb(p, SXFRCTL1) & STPWEN);
else
term = ((p->flags & (AHC_TERM_ENB_A|AHC_TERM_ENB_LVD)) ? STPWEN : 0);
scsi_conf = aic_inb(p, SCSICONF);
aic_outb(p, DFON | SPIOEN, SXFRCTL0);
aic_outb(p, (scsi_conf & ENSPCHK) | aic7xxx_seltime | term |
ENSTIMER | ACTNEGEN, SXFRCTL1);
aic_outb(p, 0, SIMODE0);
/*
* If we are a cardbus adapter then don't enable SCSI reset detection.
* We shouldn't likely be sharing SCSI busses with someone else, and
* if we don't have a cable currently plugged into the controller then
* we won't have a power source for the SCSI termination, which means
* we'll see infinite incoming bus resets.
*/
if(p->flags & AHC_NO_STPWEN)
aic_outb(p, ENSELTIMO | ENSCSIPERR, SIMODE1);
else
aic_outb(p, ENSELTIMO | ENSCSIRST | ENSCSIPERR, SIMODE1);
aic_outb(p, 0, SCSIRATE);
if ( p->features & AHC_ULTRA2)
aic_outb(p, 0, SCSIOFFSET);
/*
* Look at the information that board initialization or the board
* BIOS has left us. In the lower four bits of each target's
* scratch space any value other than 0 indicates that we should
* initiate synchronous transfers. If it's zero, the user or the
* BIOS has decided to disable synchronous negotiation to that
* target so we don't activate the needsdtr flag.
*/
if ((p->features & (AHC_TWIN|AHC_WIDE)) == 0)
{
max_targets = 8;
}
else
{
max_targets = 16;
}
if (!(aic7xxx_no_reset))
{
/*
* If we reset the bus, then clear the transfer settings, else leave
* them be.
*/
aic_outb(p, 0, ULTRA_ENB);
aic_outb(p, 0, ULTRA_ENB + 1);
p->ultraenb = 0;
}
/*
* Allocate enough hardware scbs to handle the maximum number of
* concurrent transactions we can have. We have to make sure that
* the allocated memory is contiguous memory. The Linux kmalloc
* routine should only allocate contiguous memory, but note that
* this could be a problem if kmalloc() is changed.
*/
{
size_t array_size;
unsigned int hscb_physaddr;
array_size = p->scb_data->maxscbs * sizeof(struct aic7xxx_hwscb);
if (p->scb_data->hscbs == NULL)
{
/* pci_alloc_consistent enforces the alignment already and
* clears the area as well.
*/
p->scb_data->hscbs = pci_alloc_consistent(p->pdev, array_size,
&p->scb_data->hscbs_dma);
/* We have to use pci_free_consistent, not kfree */
p->scb_data->hscb_kmalloc_ptr = NULL;
p->scb_data->hscbs_dma_len = array_size;
}
if (p->scb_data->hscbs == NULL)
{
printk("(scsi%d) Unable to allocate hardware SCB array; "
"failing detection.\n", p->host_no);
aic_outb(p, 0, SIMODE1);
p->irq = 0;
return(0);
}
hscb_physaddr = p->scb_data->hscbs_dma;
aic_outb(p, hscb_physaddr & 0xFF, HSCB_ADDR);
aic_outb(p, (hscb_physaddr >> 8) & 0xFF, HSCB_ADDR + 1);
aic_outb(p, (hscb_physaddr >> 16) & 0xFF, HSCB_ADDR + 2);
aic_outb(p, (hscb_physaddr >> 24) & 0xFF, HSCB_ADDR + 3);
/* Set up the fifo areas at the same time */
p->untagged_scbs = pci_alloc_consistent(p->pdev, 3*256, &p->fifo_dma);
if (p->untagged_scbs == NULL)
{
printk("(scsi%d) Unable to allocate hardware FIFO arrays; "
"failing detection.\n", p->host_no);
p->irq = 0;
return(0);
}
p->qoutfifo = p->untagged_scbs + 256;
p->qinfifo = p->qoutfifo + 256;
for (i = 0; i < 256; i++)
{
p->untagged_scbs[i] = SCB_LIST_NULL;
p->qinfifo[i] = SCB_LIST_NULL;
p->qoutfifo[i] = SCB_LIST_NULL;
}
hscb_physaddr = p->fifo_dma;
aic_outb(p, hscb_physaddr & 0xFF, SCBID_ADDR);
aic_outb(p, (hscb_physaddr >> 8) & 0xFF, SCBID_ADDR + 1);
aic_outb(p, (hscb_physaddr >> 16) & 0xFF, SCBID_ADDR + 2);
aic_outb(p, (hscb_physaddr >> 24) & 0xFF, SCBID_ADDR + 3);
}
/* The Q-FIFOs we just set up are all empty */
aic_outb(p, 0, QINPOS);
aic_outb(p, 0, KERNEL_QINPOS);
aic_outb(p, 0, QOUTPOS);
if(p->features & AHC_QUEUE_REGS)
{
aic_outb(p, SCB_QSIZE_256, QOFF_CTLSTA);
aic_outb(p, 0, SDSCB_QOFF);
aic_outb(p, 0, SNSCB_QOFF);
aic_outb(p, 0, HNSCB_QOFF);
}
/*
* We don't have any waiting selections or disconnected SCBs.
*/
aic_outb(p, SCB_LIST_NULL, WAITING_SCBH);
aic_outb(p, SCB_LIST_NULL, DISCONNECTED_SCBH);
/*
* Message out buffer starts empty
*/
aic_outb(p, MSG_NOOP, MSG_OUT);
aic_outb(p, MSG_NOOP, LAST_MSG);
/*
* Set all the other asundry items that haven't been set yet.
* This includes just dumping init values to a lot of registers simply
* to make sure they've been touched and are ready for use parity wise
* speaking.
*/
aic_outb(p, 0, TMODE_CMDADDR);
aic_outb(p, 0, TMODE_CMDADDR + 1);
aic_outb(p, 0, TMODE_CMDADDR + 2);
aic_outb(p, 0, TMODE_CMDADDR + 3);
aic_outb(p, 0, TMODE_CMDADDR_NEXT);
/*
* Link us into the list of valid hosts
*/
p->next = first_aic7xxx;
first_aic7xxx = p;
/*
* Allocate the first set of scbs for this controller. This is to stream-
* line code elsewhere in the driver. If we have to check for the existence
* of scbs in certain code sections, it slows things down. However, as
* soon as we register the IRQ for this card, we could get an interrupt that
* includes possibly the SCSI_RSTI interrupt. If we catch that interrupt
* then we are likely to segfault if we don't have at least one chunk of
* SCBs allocated or add checks all through the reset code to make sure
* that the SCBs have been allocated which is an invalid running condition
* and therefore I think it's preferable to simply pre-allocate the first
* chunk of SCBs.
*/
aic7xxx_allocate_scb(p);
/*
* Load the sequencer program, then re-enable the board -
* resetting the AIC-7770 disables it, leaving the lights
* on with nobody home.
*/
aic7xxx_loadseq(p);
/*
* Make sure the AUTOFLUSHDIS bit is *not* set in the SBLKCTL register
*/
aic_outb(p, aic_inb(p, SBLKCTL) & ~AUTOFLUSHDIS, SBLKCTL);
if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
{
aic_outb(p, ENABLE, BCTL); /* Enable the boards BUS drivers. */
}
if ( !(aic7xxx_no_reset) )
{
if (p->features & AHC_TWIN)
{
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk(KERN_INFO "(scsi%d) Resetting channel B\n", p->host_no);
aic_outb(p, aic_inb(p, SBLKCTL) | SELBUSB, SBLKCTL);
aic7xxx_reset_current_bus(p);
aic_outb(p, aic_inb(p, SBLKCTL) & ~SELBUSB, SBLKCTL);
}
/* Reset SCSI bus A. */
if (aic7xxx_verbose & VERBOSE_PROBE2)
{ /* In case we are a 3940, 3985, or 7895, print the right channel */
char *channel = "";
if (p->flags & AHC_MULTI_CHANNEL)
{
channel = " A";
if (p->flags & (AHC_CHNLB|AHC_CHNLC))
channel = (p->flags & AHC_CHNLB) ? " B" : " C";
}
printk(KERN_INFO "(scsi%d) Resetting channel%s\n", p->host_no, channel);
}
aic7xxx_reset_current_bus(p);
}
else
{
if (!reset_delay)
{
printk(KERN_INFO "(scsi%d) Not resetting SCSI bus. Note: Don't use "
"the no_reset\n", p->host_no);
printk(KERN_INFO "(scsi%d) option unless you have a verifiable need "
"for it.\n", p->host_no);
}
}
/*
* Register IRQ with the kernel. Only allow sharing IRQs with
* PCI devices.
*/
if (!(p->chip & AHC_PCI))
{
result = (request_irq(p->irq, do_aic7xxx_isr, 0, "aic7xxx", p));
}
else
{
result = (request_irq(p->irq, do_aic7xxx_isr, IRQF_SHARED,
"aic7xxx", p));
if (result < 0)
{
result = (request_irq(p->irq, do_aic7xxx_isr, IRQF_DISABLED | IRQF_SHARED,
"aic7xxx", p));
}
}
if (result < 0)
{
printk(KERN_WARNING "(scsi%d) Couldn't register IRQ %d, ignoring "
"controller.\n", p->host_no, p->irq);
aic_outb(p, 0, SIMODE1);
p->irq = 0;
return (0);
}
if(aic_inb(p, INTSTAT) & INT_PEND)
printk(INFO_LEAD "spurious interrupt during configuration, cleared.\n",
p->host_no, -1, -1 , -1);
aic7xxx_clear_intstat(p);
unpause_sequencer(p, /* unpause_always */ TRUE);
return (found);
}
/*+F*************************************************************************
* Function:
* aic7xxx_chip_reset
*
* Description:
* Perform a chip reset on the aic7xxx SCSI controller. The controller
* is paused upon return.
*-F*************************************************************************/
static int
aic7xxx_chip_reset(struct aic7xxx_host *p)
{
unsigned char sblkctl;
int wait;
/*
* For some 274x boards, we must clear the CHIPRST bit and pause
* the sequencer. For some reason, this makes the driver work.
*/
aic_outb(p, PAUSE | CHIPRST, HCNTRL);
/*
* In the future, we may call this function as a last resort for
* error handling. Let's be nice and not do any unnecessary delays.
*/
wait = 1000; /* 1 msec (1000 * 1 msec) */
while (--wait && !(aic_inb(p, HCNTRL) & CHIPRSTACK))
{
udelay(1); /* 1 usec */
}
pause_sequencer(p);
sblkctl = aic_inb(p, SBLKCTL) & (SELBUSB|SELWIDE);
if (p->chip & AHC_PCI)
sblkctl &= ~SELBUSB;
switch( sblkctl )
{
case 0: /* normal narrow card */
break;
case 2: /* Wide card */
p->features |= AHC_WIDE;
break;
case 8: /* Twin card */
p->features |= AHC_TWIN;
p->flags |= AHC_MULTI_CHANNEL;
break;
default: /* hmmm...we don't know what this is */
printk(KERN_WARNING "aic7xxx: Unsupported adapter type %d, ignoring.\n",
aic_inb(p, SBLKCTL) & 0x0a);
return(-1);
}
return(0);
}
/*+F*************************************************************************
* Function:
* aic7xxx_alloc
*
* Description:
* Allocate and initialize a host structure. Returns NULL upon error
* and a pointer to a aic7xxx_host struct upon success.
*-F*************************************************************************/
static struct aic7xxx_host *
aic7xxx_alloc(struct scsi_host_template *sht, struct aic7xxx_host *temp)
{
struct aic7xxx_host *p = NULL;
struct Scsi_Host *host;
/*
* Allocate a storage area by registering us with the mid-level
* SCSI layer.
*/
host = scsi_register(sht, sizeof(struct aic7xxx_host));
if (host != NULL)
{
p = (struct aic7xxx_host *) host->hostdata;
memset(p, 0, sizeof(struct aic7xxx_host));
*p = *temp;
p->host = host;
p->scb_data = kzalloc(sizeof(scb_data_type), GFP_ATOMIC);
if (p->scb_data)
{
scbq_init (&p->scb_data->free_scbs);
}
else
{
/*
* For some reason we don't have enough memory. Free the
* allocated memory for the aic7xxx_host struct, and return NULL.
*/
release_region(p->base, MAXREG - MINREG);
scsi_unregister(host);
return(NULL);
}
p->host_no = host->host_no;
}
return (p);
}
/*+F*************************************************************************
* Function:
* aic7xxx_free
*
* Description:
* Frees and releases all resources associated with an instance of
* the driver (struct aic7xxx_host *).
*-F*************************************************************************/
static void
aic7xxx_free(struct aic7xxx_host *p)
{
int i;
/*
* Free the allocated hardware SCB space.
*/
if (p->scb_data != NULL)
{
struct aic7xxx_scb_dma *scb_dma = NULL;
if (p->scb_data->hscbs != NULL)
{
pci_free_consistent(p->pdev, p->scb_data->hscbs_dma_len,
p->scb_data->hscbs, p->scb_data->hscbs_dma);
p->scb_data->hscbs = p->scb_data->hscb_kmalloc_ptr = NULL;
}
/*
* Free the driver SCBs. These were allocated on an as-need
* basis. We allocated these in groups depending on how many
* we could fit into a given amount of RAM. The tail SCB for
* these allocations has a pointer to the alloced area.
*/
for (i = 0; i < p->scb_data->numscbs; i++)
{
if (p->scb_data->scb_array[i]->scb_dma != scb_dma)
{
scb_dma = p->scb_data->scb_array[i]->scb_dma;
pci_free_consistent(p->pdev, scb_dma->dma_len,
(void *)((unsigned long)scb_dma->dma_address
- scb_dma->dma_offset),
scb_dma->dma_address);
}
kfree(p->scb_data->scb_array[i]->kmalloc_ptr);
p->scb_data->scb_array[i] = NULL;
}
/*
* Free the SCB data area.
*/
kfree(p->scb_data);
}
pci_free_consistent(p->pdev, 3*256, (void *)p->untagged_scbs, p->fifo_dma);
}
/*+F*************************************************************************
* Function:
* aic7xxx_load_seeprom
*
* Description:
* Load the seeprom and configure adapter and target settings.
* Returns 1 if the load was successful and 0 otherwise.
*-F*************************************************************************/
static void
aic7xxx_load_seeprom(struct aic7xxx_host *p, unsigned char *sxfrctl1)
{
int have_seeprom = 0;
int i, max_targets, mask;
unsigned char scsirate, scsi_conf;
unsigned short scarray[128];
struct seeprom_config *sc = (struct seeprom_config *) scarray;
if (aic7xxx_verbose & VERBOSE_PROBE2)
{
printk(KERN_INFO "aic7xxx: Loading serial EEPROM...");
}
switch (p->chip)
{
case (AHC_AIC7770|AHC_EISA): /* None of these adapters have seeproms. */
if (aic_inb(p, SCSICONF) & TERM_ENB)
p->flags |= AHC_TERM_ENB_A;
if ( (p->features & AHC_TWIN) && (aic_inb(p, SCSICONF + 1) & TERM_ENB) )
p->flags |= AHC_TERM_ENB_B;
break;
case (AHC_AIC7770|AHC_VL):
have_seeprom = read_284x_seeprom(p, (struct seeprom_config *) scarray);
break;
default:
have_seeprom = read_seeprom(p, (p->flags & (AHC_CHNLB|AHC_CHNLC)),
scarray, p->sc_size, p->sc_type);
if (!have_seeprom)
{
if(p->sc_type == C46)
have_seeprom = read_seeprom(p, (p->flags & (AHC_CHNLB|AHC_CHNLC)),
scarray, p->sc_size, C56_66);
else
have_seeprom = read_seeprom(p, (p->flags & (AHC_CHNLB|AHC_CHNLC)),
scarray, p->sc_size, C46);
}
if (!have_seeprom)
{
p->sc_size = 128;
have_seeprom = read_seeprom(p, 4*(p->flags & (AHC_CHNLB|AHC_CHNLC)),
scarray, p->sc_size, p->sc_type);
if (!have_seeprom)
{
if(p->sc_type == C46)
have_seeprom = read_seeprom(p, 4*(p->flags & (AHC_CHNLB|AHC_CHNLC)),
scarray, p->sc_size, C56_66);
else
have_seeprom = read_seeprom(p, 4*(p->flags & (AHC_CHNLB|AHC_CHNLC)),
scarray, p->sc_size, C46);
}
}
break;
}
if (!have_seeprom)
{
if (aic7xxx_verbose & VERBOSE_PROBE2)
{
printk("\naic7xxx: No SEEPROM available.\n");
}
p->flags |= AHC_NEWEEPROM_FMT;
if (aic_inb(p, SCSISEQ) == 0)
{
p->flags |= AHC_USEDEFAULTS;
p->flags &= ~AHC_BIOS_ENABLED;
p->scsi_id = p->scsi_id_b = 7;
*sxfrctl1 |= STPWEN;
if (aic7xxx_verbose & VERBOSE_PROBE2)
{
printk("aic7xxx: Using default values.\n");
}
}
else if (aic7xxx_verbose & VERBOSE_PROBE2)
{
printk("aic7xxx: Using leftover BIOS values.\n");
}
if ( ((p->chip & ~AHC_CHIPID_MASK) == AHC_PCI) && (*sxfrctl1 & STPWEN) )
{
p->flags |= AHC_TERM_ENB_SE_LOW | AHC_TERM_ENB_SE_HIGH;
sc->adapter_control &= ~CFAUTOTERM;
sc->adapter_control |= CFSTERM | CFWSTERM | CFLVDSTERM;
}
if (aic7xxx_extended)
p->flags |= (AHC_EXTEND_TRANS_A | AHC_EXTEND_TRANS_B);
else
p->flags &= ~(AHC_EXTEND_TRANS_A | AHC_EXTEND_TRANS_B);
}
else
{
if (aic7xxx_verbose & VERBOSE_PROBE2)
{
printk("done\n");
}
/*
* Note things in our flags
*/
p->flags |= AHC_SEEPROM_FOUND;
/*
* Update the settings in sxfrctl1 to match the termination settings.
*/
*sxfrctl1 = 0;
/*
* Get our SCSI ID from the SEEPROM setting...
*/
p->scsi_id = (sc->brtime_id & CFSCSIID);
/*
* First process the settings that are different between the VLB
* and PCI adapter seeproms.
*/
if ((p->chip & AHC_CHIPID_MASK) == AHC_AIC7770)
{
/* VLB adapter seeproms */
if (sc->bios_control & CF284XEXTEND)
p->flags |= AHC_EXTEND_TRANS_A;
if (sc->adapter_control & CF284XSTERM)
{
*sxfrctl1 |= STPWEN;
p->flags |= AHC_TERM_ENB_SE_LOW | AHC_TERM_ENB_SE_HIGH;
}
}
else
{
/* PCI adapter seeproms */
if (sc->bios_control & CFEXTEND)
p->flags |= AHC_EXTEND_TRANS_A;
if (sc->bios_control & CFBIOSEN)
p->flags |= AHC_BIOS_ENABLED;
else
p->flags &= ~AHC_BIOS_ENABLED;
if (sc->adapter_control & CFSTERM)
{
*sxfrctl1 |= STPWEN;
p->flags |= AHC_TERM_ENB_SE_LOW | AHC_TERM_ENB_SE_HIGH;
}
}
memcpy(&p->sc, sc, sizeof(struct seeprom_config));
}
p->discenable = 0;
/*
* Limit to 16 targets just in case. The 2842 for one is known to
* blow the max_targets setting, future cards might also.
*/
max_targets = ((p->features & (AHC_TWIN | AHC_WIDE)) ? 16 : 8);
if (have_seeprom)
{
for (i = 0; i < max_targets; i++)
{
if( ((p->features & AHC_ULTRA) &&
!(sc->adapter_control & CFULTRAEN) &&
(sc->device_flags[i] & CFSYNCHISULTRA)) ||
(sc->device_flags[i] & CFNEWULTRAFORMAT) )
{
p->flags |= AHC_NEWEEPROM_FMT;
break;
}
}
}
for (i = 0; i < max_targets; i++)
{
mask = (0x01 << i);
if (!have_seeprom)
{
if (aic_inb(p, SCSISEQ) != 0)
{
/*
* OK...the BIOS set things up and left behind the settings we need.
* Just make our sc->device_flags[i] entry match what the card has
* set for this device.
*/
p->discenable =
~(aic_inb(p, DISC_DSB) | (aic_inb(p, DISC_DSB + 1) << 8) );
p->ultraenb =
(aic_inb(p, ULTRA_ENB) | (aic_inb(p, ULTRA_ENB + 1) << 8) );
sc->device_flags[i] = (p->discenable & mask) ? CFDISC : 0;
if (aic_inb(p, TARG_SCSIRATE + i) & WIDEXFER)
sc->device_flags[i] |= CFWIDEB;
if (p->features & AHC_ULTRA2)
{
if (aic_inb(p, TARG_OFFSET + i))
{
sc->device_flags[i] |= CFSYNCH;
sc->device_flags[i] |= (aic_inb(p, TARG_SCSIRATE + i) & 0x07);
if ( (aic_inb(p, TARG_SCSIRATE + i) & 0x18) == 0x18 )
sc->device_flags[i] |= CFSYNCHISULTRA;
}
}
else
{
if (aic_inb(p, TARG_SCSIRATE + i) & ~WIDEXFER)
{
sc->device_flags[i] |= CFSYNCH;
if (p->features & AHC_ULTRA)
sc->device_flags[i] |= ((p->ultraenb & mask) ?
CFSYNCHISULTRA : 0);
}
}
}
else
{
/*
* Assume the BIOS has NOT been run on this card and nothing between
* the card and the devices is configured yet.
*/
sc->device_flags[i] = CFDISC;
if (p->features & AHC_WIDE)
sc->device_flags[i] |= CFWIDEB;
if (p->features & AHC_ULTRA3)
sc->device_flags[i] |= 2;
else if (p->features & AHC_ULTRA2)
sc->device_flags[i] |= 3;
else if (p->features & AHC_ULTRA)
sc->device_flags[i] |= CFSYNCHISULTRA;
sc->device_flags[i] |= CFSYNCH;
aic_outb(p, 0, TARG_SCSIRATE + i);
if (p->features & AHC_ULTRA2)
aic_outb(p, 0, TARG_OFFSET + i);
}
}
if (sc->device_flags[i] & CFDISC)
{
p->discenable |= mask;
}
if (p->flags & AHC_NEWEEPROM_FMT)
{
if ( !(p->features & AHC_ULTRA2) )
{
/*
* I know of two different Ultra BIOSes that do this differently.
* One on the Gigabyte 6BXU mb that wants flags[i] & CFXFER to
* be == to 0x03 and SYNCHISULTRA to be true to mean 40MByte/s
* while on the IBM Netfinity 5000 they want the same thing
* to be something else, while flags[i] & CFXFER == 0x03 and
* SYNCHISULTRA false should be 40MByte/s. So, we set both to
* 40MByte/s and the lower speeds be damned. People will have
* to select around the conversely mapped lower speeds in order
* to select lower speeds on these boards.
*/
if ( (sc->device_flags[i] & CFNEWULTRAFORMAT) &&
((sc->device_flags[i] & CFXFER) == 0x03) )
{
sc->device_flags[i] &= ~CFXFER;
sc->device_flags[i] |= CFSYNCHISULTRA;
}
if (sc->device_flags[i] & CFSYNCHISULTRA)
{
p->ultraenb |= mask;
}
}
else if ( !(sc->device_flags[i] & CFNEWULTRAFORMAT) &&
(p->features & AHC_ULTRA2) &&
(sc->device_flags[i] & CFSYNCHISULTRA) )
{
p->ultraenb |= mask;
}
}
else if (sc->adapter_control & CFULTRAEN)
{
p->ultraenb |= mask;
}
if ( (sc->device_flags[i] & CFSYNCH) == 0)
{
sc->device_flags[i] &= ~CFXFER;
p->ultraenb &= ~mask;
p->user[i].offset = 0;
p->user[i].period = 0;
p->user[i].options = 0;
}
else
{
if (p->features & AHC_ULTRA3)
{
p->user[i].offset = MAX_OFFSET_ULTRA2;
if( (sc->device_flags[i] & CFXFER) < 0x03 )
{
scsirate = (sc->device_flags[i] & CFXFER);
p->user[i].options = MSG_EXT_PPR_OPTION_DT_CRC;
}
else
{
scsirate = (sc->device_flags[i] & CFXFER) |
((p->ultraenb & mask) ? 0x18 : 0x10);
p->user[i].options = 0;
}
p->user[i].period = aic7xxx_find_period(p, scsirate,
AHC_SYNCRATE_ULTRA3);
}
else if (p->features & AHC_ULTRA2)
{
p->user[i].offset = MAX_OFFSET_ULTRA2;
scsirate = (sc->device_flags[i] & CFXFER) |
((p->ultraenb & mask) ? 0x18 : 0x10);
p->user[i].options = 0;
p->user[i].period = aic7xxx_find_period(p, scsirate,
AHC_SYNCRATE_ULTRA2);
}
else
{
scsirate = (sc->device_flags[i] & CFXFER) << 4;
p->user[i].options = 0;
p->user[i].offset = MAX_OFFSET_8BIT;
if (p->features & AHC_ULTRA)
{
short ultraenb;
ultraenb = aic_inb(p, ULTRA_ENB) |
(aic_inb(p, ULTRA_ENB + 1) << 8);
p->user[i].period = aic7xxx_find_period(p, scsirate,
(p->ultraenb & mask) ?
AHC_SYNCRATE_ULTRA :
AHC_SYNCRATE_FAST);
}
else
p->user[i].period = aic7xxx_find_period(p, scsirate,
AHC_SYNCRATE_FAST);
}
}
if ( (sc->device_flags[i] & CFWIDEB) && (p->features & AHC_WIDE) )
{
p->user[i].width = MSG_EXT_WDTR_BUS_16_BIT;
}
else
{
p->user[i].width = MSG_EXT_WDTR_BUS_8_BIT;
}
}
aic_outb(p, ~(p->discenable & 0xFF), DISC_DSB);
aic_outb(p, ~((p->discenable >> 8) & 0xFF), DISC_DSB + 1);
/*
* We set the p->ultraenb from the SEEPROM to begin with, but now we make
* it match what is already down in the card. If we are doing a reset
* on the card then this will get put back to a default state anyway.
* This allows us to not have to pre-emptively negotiate when using the
* no_reset option.
*/
if (p->features & AHC_ULTRA)
p->ultraenb = aic_inb(p, ULTRA_ENB) | (aic_inb(p, ULTRA_ENB + 1) << 8);
scsi_conf = (p->scsi_id & HSCSIID);
if(have_seeprom)
{
p->adapter_control = sc->adapter_control;
p->bios_control = sc->bios_control;
switch (p->chip & AHC_CHIPID_MASK)
{
case AHC_AIC7895:
case AHC_AIC7896:
case AHC_AIC7899:
if (p->adapter_control & CFBPRIMARY)
p->flags |= AHC_CHANNEL_B_PRIMARY;
default:
break;
}
if (sc->adapter_control & CFSPARITY)
scsi_conf |= ENSPCHK;
}
else
{
scsi_conf |= ENSPCHK | RESET_SCSI;
}
/*
* Only set the SCSICONF and SCSICONF + 1 registers if we are a PCI card.
* The 2842 and 2742 cards already have these registers set and we don't
* want to muck with them since we don't set all the bits they do.
*/
if ( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI )
{
/* Set the host ID */
aic_outb(p, scsi_conf, SCSICONF);
/* In case we are a wide card */
aic_outb(p, p->scsi_id, SCSICONF + 1);
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_configure_bugs
*
* Description:
* Take the card passed in and set the appropriate bug flags based upon
* the card model. Also make any changes needed to device registers or
* PCI registers while we are here.
*-F*************************************************************************/
static void
aic7xxx_configure_bugs(struct aic7xxx_host *p)
{
unsigned short tmp_word;
switch(p->chip & AHC_CHIPID_MASK)
{
case AHC_AIC7860:
p->bugs |= AHC_BUG_PCI_2_1_RETRY;
/* fall through */
case AHC_AIC7850:
case AHC_AIC7870:
p->bugs |= AHC_BUG_TMODE_WIDEODD | AHC_BUG_CACHETHEN | AHC_BUG_PCI_MWI;
break;
case AHC_AIC7880:
p->bugs |= AHC_BUG_TMODE_WIDEODD | AHC_BUG_PCI_2_1_RETRY |
AHC_BUG_CACHETHEN | AHC_BUG_PCI_MWI;
break;
case AHC_AIC7890:
p->bugs |= AHC_BUG_AUTOFLUSH | AHC_BUG_CACHETHEN;
break;
case AHC_AIC7892:
p->bugs |= AHC_BUG_SCBCHAN_UPLOAD;
break;
case AHC_AIC7895:
p->bugs |= AHC_BUG_TMODE_WIDEODD | AHC_BUG_PCI_2_1_RETRY |
AHC_BUG_CACHETHEN | AHC_BUG_PCI_MWI;
break;
case AHC_AIC7896:
p->bugs |= AHC_BUG_CACHETHEN_DIS;
break;
case AHC_AIC7899:
p->bugs |= AHC_BUG_SCBCHAN_UPLOAD;
break;
default:
/* Nothing to do */
break;
}
/*
* Now handle the bugs that require PCI register or card register tweaks
*/
pci_read_config_word(p->pdev, PCI_COMMAND, &tmp_word);
if(p->bugs & AHC_BUG_PCI_MWI)
{
tmp_word &= ~PCI_COMMAND_INVALIDATE;
}
else
{
tmp_word |= PCI_COMMAND_INVALIDATE;
}
pci_write_config_word(p->pdev, PCI_COMMAND, tmp_word);
if(p->bugs & AHC_BUG_CACHETHEN)
{
aic_outb(p, aic_inb(p, DSCOMMAND0) & ~CACHETHEN, DSCOMMAND0);
}
else if (p->bugs & AHC_BUG_CACHETHEN_DIS)
{
aic_outb(p, aic_inb(p, DSCOMMAND0) | CACHETHEN, DSCOMMAND0);
}
return;
}
/*+F*************************************************************************
* Function:
* aic7xxx_detect
*
* Description:
* Try to detect and register an Adaptec 7770 or 7870 SCSI controller.
*
* XXX - This should really be called aic7xxx_probe(). A sequence of
* probe(), attach()/detach(), and init() makes more sense than
* one do-it-all function. This may be useful when (and if) the
* mid-level SCSI code is overhauled.
*-F*************************************************************************/
static int
aic7xxx_detect(struct scsi_host_template *template)
{
struct aic7xxx_host *temp_p = NULL;
struct aic7xxx_host *current_p = NULL;
struct aic7xxx_host *list_p = NULL;
int found = 0;
#if defined(__i386__) || defined(__alpha__)
ahc_flag_type flags = 0;
int type;
#endif
unsigned char sxfrctl1;
#if defined(__i386__) || defined(__alpha__)
unsigned char hcntrl, hostconf;
unsigned int slot, base;
#endif
#ifdef MODULE
/*
* If we are called as a module, the aic7xxx pointer may not be null
* and it would point to our bootup string, just like on the lilo
* command line. IF not NULL, then process this config string with
* aic7xxx_setup
*/
if(aic7xxx)
aic7xxx_setup(aic7xxx);
#endif
template->proc_name = "aic7xxx";
template->sg_tablesize = AIC7XXX_MAX_SG;
#ifdef CONFIG_PCI
/*
* PCI-bus probe.
*/
{
static struct
{
unsigned short vendor_id;
unsigned short device_id;
ahc_chip chip;
ahc_flag_type flags;
ahc_feature features;
int board_name_index;
unsigned short seeprom_size;
unsigned short seeprom_type;
} const aic_pdevs[] = {
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7810, AHC_NONE,
AHC_FNONE, AHC_FENONE, 1,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7850, AHC_AIC7850,
AHC_PAGESCBS, AHC_AIC7850_FE, 5,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7855, AHC_AIC7850,
AHC_PAGESCBS, AHC_AIC7850_FE, 6,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7821, AHC_AIC7860,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7860_FE, 7,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_3860, AHC_AIC7860,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7860_FE, 7,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_38602, AHC_AIC7860,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7860_FE, 7,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_38602, AHC_AIC7860,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7860_FE, 7,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7860, AHC_AIC7860,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MOTHERBOARD,
AHC_AIC7860_FE, 7,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7861, AHC_AIC7860,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7860_FE, 8,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7870, AHC_AIC7870,
AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MOTHERBOARD,
AHC_AIC7870_FE, 9,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7871, AHC_AIC7870,
AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7870_FE, 10,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7872, AHC_AIC7870,
AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7870_FE, 11,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7873, AHC_AIC7870,
AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7870_FE, 12,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7874, AHC_AIC7870,
AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7870_FE, 13,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7880, AHC_AIC7880,
AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MOTHERBOARD,
AHC_AIC7880_FE, 14,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7881, AHC_AIC7880,
AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 15,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7882, AHC_AIC7880,
AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7880_FE, 16,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7883, AHC_AIC7880,
AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7880_FE, 17,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7884, AHC_AIC7880,
AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 18,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7885, AHC_AIC7880,
AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 18,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7886, AHC_AIC7880,
AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 18,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7887, AHC_AIC7880,
AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE | AHC_NEW_AUTOTERM, 19,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7888, AHC_AIC7880,
AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 18,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7895, AHC_AIC7895,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7895_FE, 20,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7890, AHC_AIC7890,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7890_FE, 21,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7890B, AHC_AIC7890,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7890_FE, 21,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_2930U2, AHC_AIC7890,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7890_FE, 22,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_2940U2, AHC_AIC7890,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7890_FE, 23,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7896, AHC_AIC7896,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7896_FE, 24,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_3940U2, AHC_AIC7896,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7896_FE, 25,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_3950U2D, AHC_AIC7896,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7896_FE, 26,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_1480A, AHC_AIC7860,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_NO_STPWEN,
AHC_AIC7860_FE, 27,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7892A, AHC_AIC7892,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7892_FE, 28,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7892B, AHC_AIC7892,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7892_FE, 28,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7892D, AHC_AIC7892,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7892_FE, 28,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7892P, AHC_AIC7892,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
AHC_AIC7892_FE, 28,
32, C46 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7899A, AHC_AIC7899,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7899_FE, 29,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7899B, AHC_AIC7899,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7899_FE, 29,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7899D, AHC_AIC7899,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7899_FE, 29,
32, C56_66 },
{PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7899P, AHC_AIC7899,
AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
AHC_AIC7899_FE, 29,
32, C56_66 },
};
unsigned short command;
unsigned int devconfig, i, oldverbose;
struct pci_dev *pdev = NULL;
for (i = 0; i < ARRAY_SIZE(aic_pdevs); i++)
{
pdev = NULL;
while ((pdev = pci_get_device(aic_pdevs[i].vendor_id,
aic_pdevs[i].device_id,
pdev))) {
if (pci_enable_device(pdev))
continue;
if ( i == 0 ) /* We found one, but it's the 7810 RAID cont. */
{
if (aic7xxx_verbose & (VERBOSE_PROBE|VERBOSE_PROBE2))
{
printk(KERN_INFO "aic7xxx: The 7810 RAID controller is not "
"supported by\n");
printk(KERN_INFO " this driver, we are ignoring it.\n");
}
}
else if ( (temp_p = kzalloc(sizeof(struct aic7xxx_host),
GFP_ATOMIC)) != NULL )
{
temp_p->chip = aic_pdevs[i].chip | AHC_PCI;
temp_p->flags = aic_pdevs[i].flags;
temp_p->features = aic_pdevs[i].features;
temp_p->board_name_index = aic_pdevs[i].board_name_index;
temp_p->sc_size = aic_pdevs[i].seeprom_size;
temp_p->sc_type = aic_pdevs[i].seeprom_type;
/*
* Read sundry information from PCI BIOS.
*/
temp_p->irq = pdev->irq;
temp_p->pdev = pdev;
temp_p->pci_bus = pdev->bus->number;
temp_p->pci_device_fn = pdev->devfn;
temp_p->base = pci_resource_start(pdev, 0);
temp_p->mbase = pci_resource_start(pdev, 1);
current_p = list_p;
while(current_p && temp_p)
{
if ( ((current_p->pci_bus == temp_p->pci_bus) &&
(current_p->pci_device_fn == temp_p->pci_device_fn)) ||
(temp_p->base && (current_p->base == temp_p->base)) ||
(temp_p->mbase && (current_p->mbase == temp_p->mbase)) )
{
/* duplicate PCI entry, skip it */
kfree(temp_p);
temp_p = NULL;
continue;
}
current_p = current_p->next;
}
if(pci_request_regions(temp_p->pdev, "aic7xxx"))
{
printk("aic7xxx: <%s> at PCI %d/%d/%d\n",
board_names[aic_pdevs[i].board_name_index],
temp_p->pci_bus,
PCI_SLOT(temp_p->pci_device_fn),
PCI_FUNC(temp_p->pci_device_fn));
printk("aic7xxx: I/O ports already in use, ignoring.\n");
kfree(temp_p);
continue;
}
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk("aic7xxx: <%s> at PCI %d/%d\n",
board_names[aic_pdevs[i].board_name_index],
PCI_SLOT(pdev->devfn),
PCI_FUNC(pdev->devfn));
pci_read_config_word(pdev, PCI_COMMAND, &command);
if (aic7xxx_verbose & VERBOSE_PROBE2)
{
printk("aic7xxx: Initial PCI_COMMAND value was 0x%x\n",
(int)command);
}
#ifdef AIC7XXX_STRICT_PCI_SETUP
command |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY |
PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
#else
command |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
#endif
command &= ~PCI_COMMAND_INVALIDATE;
if (aic7xxx_pci_parity == 0)
command &= ~(PCI_COMMAND_SERR | PCI_COMMAND_PARITY);
pci_write_config_word(pdev, PCI_COMMAND, command);
#ifdef AIC7XXX_STRICT_PCI_SETUP
pci_read_config_dword(pdev, DEVCONFIG, &devconfig);
if (aic7xxx_verbose & VERBOSE_PROBE2)
{
printk("aic7xxx: Initial DEVCONFIG value was 0x%x\n", devconfig);
}
devconfig |= 0x80000040;
pci_write_config_dword(pdev, DEVCONFIG, devconfig);
#endif /* AIC7XXX_STRICT_PCI_SETUP */
temp_p->unpause = INTEN;
temp_p->pause = temp_p->unpause | PAUSE;
if ( ((temp_p->base == 0) &&
(temp_p->mbase == 0)) ||
(temp_p->irq == 0) )
{
printk("aic7xxx: <%s> at PCI %d/%d/%d\n",
board_names[aic_pdevs[i].board_name_index],
temp_p->pci_bus,
PCI_SLOT(temp_p->pci_device_fn),
PCI_FUNC(temp_p->pci_device_fn));
printk("aic7xxx: Controller disabled by BIOS, ignoring.\n");
goto skip_pci_controller;
}
#ifdef MMAPIO
if ( !(temp_p->base) || !(temp_p->flags & AHC_MULTI_CHANNEL) ||
((temp_p->chip != (AHC_AIC7870 | AHC_PCI)) &&
(temp_p->chip != (AHC_AIC7880 | AHC_PCI))) )
{
temp_p->maddr = ioremap_nocache(temp_p->mbase, 256);
if(temp_p->maddr)
{
/*
* We need to check the I/O with the MMAPed address. Some machines
* simply fail to work with MMAPed I/O and certain controllers.
*/
if(aic_inb(temp_p, HCNTRL) == 0xff)
{
/*
* OK.....we failed our test....go back to programmed I/O
*/
printk(KERN_INFO "aic7xxx: <%s> at PCI %d/%d/%d\n",
board_names[aic_pdevs[i].board_name_index],
temp_p->pci_bus,
PCI_SLOT(temp_p->pci_device_fn),
PCI_FUNC(temp_p->pci_device_fn));
printk(KERN_INFO "aic7xxx: MMAPed I/O failed, reverting to "
"Programmed I/O.\n");
iounmap(temp_p->maddr);
temp_p->maddr = NULL;
if(temp_p->base == 0)
{
printk("aic7xxx: <%s> at PCI %d/%d/%d\n",
board_names[aic_pdevs[i].board_name_index],
temp_p->pci_bus,
PCI_SLOT(temp_p->pci_device_fn),
PCI_FUNC(temp_p->pci_device_fn));
printk("aic7xxx: Controller disabled by BIOS, ignoring.\n");
goto skip_pci_controller;
}
}
}
}
#endif
/*
* We HAVE to make sure the first pause_sequencer() and all other
* subsequent I/O that isn't PCI config space I/O takes place
* after the MMAPed I/O region is configured and tested. The
* problem is the PowerPC architecture that doesn't support
* programmed I/O at all, so we have to have the MMAP I/O set up
* for this pause to even work on those machines.
*/
pause_sequencer(temp_p);
/*
* Clear out any pending PCI error status messages. Also set
* verbose to 0 so that we don't emit strange PCI error messages
* while cleaning out the current status bits.
*/
oldverbose = aic7xxx_verbose;
aic7xxx_verbose = 0;
aic7xxx_pci_intr(temp_p);
aic7xxx_verbose = oldverbose;
temp_p->bios_address = 0;
/*
* Remember how the card was setup in case there is no seeprom.
*/
if (temp_p->features & AHC_ULTRA2)
temp_p->scsi_id = aic_inb(temp_p, SCSIID_ULTRA2) & OID;
else
temp_p->scsi_id = aic_inb(temp_p, SCSIID) & OID;
/*
* Get current termination setting
*/
sxfrctl1 = aic_inb(temp_p, SXFRCTL1);
if (aic7xxx_chip_reset(temp_p) == -1)
{
goto skip_pci_controller;
}
/*
* Very quickly put the term setting back into the register since
* the chip reset may cause odd things to happen. This is to keep
* LVD busses with lots of drives from draining the power out of
* the diffsense line before we get around to running the
* configure_termination() function. Also restore the STPWLEVEL
* bit of DEVCONFIG
*/
aic_outb(temp_p, sxfrctl1, SXFRCTL1);
pci_write_config_dword(temp_p->pdev, DEVCONFIG, devconfig);
sxfrctl1 &= STPWEN;
/*
* We need to set the CHNL? assignments before loading the SEEPROM
* The 3940 and 3985 cards (original stuff, not any of the later
* stuff) are 7870 and 7880 class chips. The Ultra2 stuff falls
* under 7896 and 7897. The 7895 is in a class by itself :)
*/
switch (temp_p->chip & AHC_CHIPID_MASK)
{
case AHC_AIC7870: /* 3840 / 3985 */
case AHC_AIC7880: /* 3840 UW / 3985 UW */
if(temp_p->flags & AHC_MULTI_CHANNEL)
{
switch(PCI_SLOT(temp_p->pci_device_fn))
{
case 5:
temp_p->flags |= AHC_CHNLB;
break;
case 8:
temp_p->flags |= AHC_CHNLB;
break;
case 12:
temp_p->flags |= AHC_CHNLC;
break;
default:
break;
}
}
break;
case AHC_AIC7895: /* 7895 */
case AHC_AIC7896: /* 7896/7 */
case AHC_AIC7899: /* 7899 */
if (PCI_FUNC(pdev->devfn) != 0)
{
temp_p->flags |= AHC_CHNLB;
}
/*
* The 7895 is the only chipset that sets the SCBSIZE32 param
* in the DEVCONFIG register. The Ultra2 chipsets use
* the DSCOMMAND0 register instead.
*/
if ((temp_p->chip & AHC_CHIPID_MASK) == AHC_AIC7895)
{
pci_read_config_dword(pdev, DEVCONFIG, &devconfig);
devconfig |= SCBSIZE32;
pci_write_config_dword(pdev, DEVCONFIG, devconfig);
}
break;
default:
break;
}
/*
* Loading of the SEEPROM needs to come after we've set the flags
* to indicate possible CHNLB and CHNLC assigments. Otherwise,
* on 394x and 398x cards we'll end up reading the wrong settings
* for channels B and C
*/
switch (temp_p->chip & AHC_CHIPID_MASK)
{
case AHC_AIC7892:
case AHC_AIC7899:
aic_outb(temp_p, 0, SCAMCTL);
/*
* Switch to the alt mode of the chip...
*/
aic_outb(temp_p, aic_inb(temp_p, SFUNCT) | ALT_MODE, SFUNCT);
/*
* Set our options...the last two items set our CRC after x byte
* count in target mode...
*/
aic_outb(temp_p, AUTO_MSGOUT_DE | DIS_MSGIN_DUALEDGE, OPTIONMODE);
aic_outb(temp_p, 0x00, 0x0b);
aic_outb(temp_p, 0x10, 0x0a);
/*
* switch back to normal mode...
*/
aic_outb(temp_p, aic_inb(temp_p, SFUNCT) & ~ALT_MODE, SFUNCT);
aic_outb(temp_p, CRCVALCHKEN | CRCENDCHKEN | CRCREQCHKEN |
TARGCRCENDEN | TARGCRCCNTEN,
CRCCONTROL1);
aic_outb(temp_p, ((aic_inb(temp_p, DSCOMMAND0) | USCBSIZE32 |
MPARCKEN | CIOPARCKEN | CACHETHEN) &
~DPARCKEN), DSCOMMAND0);
aic7xxx_load_seeprom(temp_p, &sxfrctl1);
break;
case AHC_AIC7890:
case AHC_AIC7896:
aic_outb(temp_p, 0, SCAMCTL);
aic_outb(temp_p, (aic_inb(temp_p, DSCOMMAND0) |
CACHETHEN | MPARCKEN | USCBSIZE32 |
CIOPARCKEN) & ~DPARCKEN, DSCOMMAND0);
aic7xxx_load_seeprom(temp_p, &sxfrctl1);
break;
case AHC_AIC7850:
case AHC_AIC7860:
/*
* Set the DSCOMMAND0 register on these cards different from
* on the 789x cards. Also, read the SEEPROM as well.
*/
aic_outb(temp_p, (aic_inb(temp_p, DSCOMMAND0) |
CACHETHEN | MPARCKEN) & ~DPARCKEN,
DSCOMMAND0);
/* FALLTHROUGH */
default:
aic7xxx_load_seeprom(temp_p, &sxfrctl1);
break;
case AHC_AIC7880:
/*
* Check the rev of the chipset before we change DSCOMMAND0
*/
pci_read_config_dword(pdev, DEVCONFIG, &devconfig);
if ((devconfig & 0xff) >= 1)
{
aic_outb(temp_p, (aic_inb(temp_p, DSCOMMAND0) |
CACHETHEN | MPARCKEN) & ~DPARCKEN,
DSCOMMAND0);
}
aic7xxx_load_seeprom(temp_p, &sxfrctl1);
break;
}
/*
* and then we need another switch based on the type in order to
* make sure the channel B primary flag is set properly on 7895
* controllers....Arrrgggghhh!!! We also have to catch the fact
* that when you disable the BIOS on the 7895 on the Intel DK440LX
* motherboard, and possibly others, it only sets the BIOS disabled
* bit on the A channel...I think I'm starting to lean towards
* going postal....
*/
switch(temp_p->chip & AHC_CHIPID_MASK)
{
case AHC_AIC7895:
case AHC_AIC7896:
case AHC_AIC7899:
current_p = list_p;
while(current_p != NULL)
{
if ( (current_p->pci_bus == temp_p->pci_bus) &&
(PCI_SLOT(current_p->pci_device_fn) ==
PCI_SLOT(temp_p->pci_device_fn)) )
{
if ( PCI_FUNC(current_p->pci_device_fn) == 0 )
{
temp_p->flags |=
(current_p->flags & AHC_CHANNEL_B_PRIMARY);
temp_p->flags &= ~(AHC_BIOS_ENABLED|AHC_USEDEFAULTS);
temp_p->flags |=
(current_p->flags & (AHC_BIOS_ENABLED|AHC_USEDEFAULTS));
}
else
{
current_p->flags |=
(temp_p->flags & AHC_CHANNEL_B_PRIMARY);
current_p->flags &= ~(AHC_BIOS_ENABLED|AHC_USEDEFAULTS);
current_p->flags |=
(temp_p->flags & (AHC_BIOS_ENABLED|AHC_USEDEFAULTS));
}
}
current_p = current_p->next;
}
break;
default:
break;
}
/*
* We only support external SCB RAM on the 7895/6/7 chipsets.
* We could support it on the 7890/1 easy enough, but I don't
* know of any 7890/1 based cards that have it. I do know
* of 7895/6/7 cards that have it and they work properly.
*/
switch(temp_p->chip & AHC_CHIPID_MASK)
{
default:
break;
case AHC_AIC7895:
case AHC_AIC7896:
case AHC_AIC7899:
pci_read_config_dword(pdev, DEVCONFIG, &devconfig);
if (temp_p->features & AHC_ULTRA2)
{
if ( (aic_inb(temp_p, DSCOMMAND0) & RAMPSM_ULTRA2) &&
(aic7xxx_scbram) )
{
aic_outb(temp_p,
aic_inb(temp_p, DSCOMMAND0) & ~SCBRAMSEL_ULTRA2,
DSCOMMAND0);
temp_p->flags |= AHC_EXTERNAL_SRAM;
devconfig |= EXTSCBPEN;
}
else if (aic_inb(temp_p, DSCOMMAND0) & RAMPSM_ULTRA2)
{
printk(KERN_INFO "aic7xxx: <%s> at PCI %d/%d/%d\n",
board_names[aic_pdevs[i].board_name_index],
temp_p->pci_bus,
PCI_SLOT(temp_p->pci_device_fn),
PCI_FUNC(temp_p->pci_device_fn));
printk("aic7xxx: external SCB RAM detected, "
"but not enabled\n");
}
}
else
{
if ((devconfig & RAMPSM) && (aic7xxx_scbram))
{
devconfig &= ~SCBRAMSEL;
devconfig |= EXTSCBPEN;
temp_p->flags |= AHC_EXTERNAL_SRAM;
}
else if (devconfig & RAMPSM)
{
printk(KERN_INFO "aic7xxx: <%s> at PCI %d/%d/%d\n",
board_names[aic_pdevs[i].board_name_index],
temp_p->pci_bus,
PCI_SLOT(temp_p->pci_device_fn),
PCI_FUNC(temp_p->pci_device_fn));
printk("aic7xxx: external SCB RAM detected, "
"but not enabled\n");
}
}
pci_write_config_dword(pdev, DEVCONFIG, devconfig);
if ( (temp_p->flags & AHC_EXTERNAL_SRAM) &&
(temp_p->flags & AHC_CHNLB) )
aic_outb(temp_p, 1, CCSCBBADDR);
break;
}
/*
* Take the LED out of diagnostic mode
*/
aic_outb(temp_p,
(aic_inb(temp_p, SBLKCTL) & ~(DIAGLEDEN | DIAGLEDON)),
SBLKCTL);
/*
* We don't know where this is set in the SEEPROM or by the
* BIOS, so we default to 100%. On Ultra2 controllers, use 75%
* instead.
*/
if (temp_p->features & AHC_ULTRA2)
{
aic_outb(temp_p, RD_DFTHRSH_MAX | WR_DFTHRSH_MAX, DFF_THRSH);
}
else
{
aic_outb(temp_p, DFTHRSH_100, DSPCISTATUS);
}
/*
* Call our function to fixup any bugs that exist on this chipset.
* This may muck with PCI settings and other device settings, so
* make sure it's after all the other PCI and device register
* tweaks so it can back out bad settings on specific broken cards.
*/
aic7xxx_configure_bugs(temp_p);
/* Hold a pci device reference */
pci_dev_get(temp_p->pdev);
if ( list_p == NULL )
{
list_p = current_p = temp_p;
}
else
{
current_p = list_p;
while(current_p->next != NULL)
current_p = current_p->next;
current_p->next = temp_p;
}
temp_p->next = NULL;
found++;
continue;
skip_pci_controller:
#ifdef CONFIG_PCI
pci_release_regions(temp_p->pdev);
#endif
kfree(temp_p);
} /* Found an Adaptec PCI device. */
else /* Well, we found one, but we couldn't get any memory */
{
printk("aic7xxx: Found <%s>\n",
board_names[aic_pdevs[i].board_name_index]);
printk(KERN_INFO "aic7xxx: Unable to allocate device memory, "
"skipping.\n");
}
} /* while(pdev=....) */
} /* for PCI_DEVICES */
}
#endif /* CONFIG_PCI */
#if defined(__i386__) || defined(__alpha__)
/*
* EISA/VL-bus card signature probe.
*/
slot = MINSLOT;
while ( (slot <= MAXSLOT) &&
!(aic7xxx_no_probe) )
{
base = SLOTBASE(slot) + MINREG;
if (!request_region(base, MAXREG - MINREG, "aic7xxx"))
{
/*
* Some other driver has staked a
* claim to this i/o region already.
*/
slot++;
continue; /* back to the beginning of the for loop */
}
flags = 0;
type = aic7xxx_probe(slot, base + AHC_HID0, &flags);
if (type == -1)
{
release_region(base, MAXREG - MINREG);
slot++;
continue;
}
temp_p = kmalloc(sizeof(struct aic7xxx_host), GFP_ATOMIC);
if (temp_p == NULL)
{
printk(KERN_WARNING "aic7xxx: Unable to allocate device space.\n");
release_region(base, MAXREG - MINREG);
slot++;
continue; /* back to the beginning of the while loop */
}
/*
* Pause the card preserving the IRQ type. Allow the operator
* to override the IRQ trigger.
*/
if (aic7xxx_irq_trigger == 1)
hcntrl = IRQMS; /* Level */
else if (aic7xxx_irq_trigger == 0)
hcntrl = 0; /* Edge */
else
hcntrl = inb(base + HCNTRL) & IRQMS; /* Default */
memset(temp_p, 0, sizeof(struct aic7xxx_host));
temp_p->unpause = hcntrl | INTEN;
temp_p->pause = hcntrl | PAUSE | INTEN;
temp_p->base = base;
temp_p->mbase = 0;
temp_p->maddr = NULL;
temp_p->pci_bus = 0;
temp_p->pci_device_fn = slot;
aic_outb(temp_p, hcntrl | PAUSE, HCNTRL);
while( (aic_inb(temp_p, HCNTRL) & PAUSE) == 0 ) ;
if (aic7xxx_chip_reset(temp_p) == -1)
temp_p->irq = 0;
else
temp_p->irq = aic_inb(temp_p, INTDEF) & 0x0F;
temp_p->flags |= AHC_PAGESCBS;
switch (temp_p->irq)
{
case 9:
case 10:
case 11:
case 12:
case 14:
case 15:
break;
default:
printk(KERN_WARNING "aic7xxx: Host adapter uses unsupported IRQ "
"level %d, ignoring.\n", temp_p->irq);
kfree(temp_p);
release_region(base, MAXREG - MINREG);
slot++;
continue; /* back to the beginning of the while loop */
}
/*
* We are commited now, everything has been checked and this card
* has been found, now we just set it up
*/
/*
* Insert our new struct into the list at the end
*/
if (list_p == NULL)
{
list_p = current_p = temp_p;
}
else
{
current_p = list_p;
while (current_p->next != NULL)
current_p = current_p->next;
current_p->next = temp_p;
}
switch (type)
{
case 0:
temp_p->board_name_index = 2;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk("aic7xxx: <%s> at EISA %d\n",
board_names[2], slot);
/* FALLTHROUGH */
case 1:
{
temp_p->chip = AHC_AIC7770 | AHC_EISA;
temp_p->features |= AHC_AIC7770_FE;
temp_p->bios_control = aic_inb(temp_p, HA_274_BIOSCTRL);
/*
* Get the primary channel information. Right now we don't
* do anything with this, but someday we will be able to inform
* the mid-level SCSI code which channel is primary.
*/
if (temp_p->board_name_index == 0)
{
temp_p->board_name_index = 3;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk("aic7xxx: <%s> at EISA %d\n",
board_names[3], slot);
}
if (temp_p->bios_control & CHANNEL_B_PRIMARY)
{
temp_p->flags |= AHC_CHANNEL_B_PRIMARY;
}
if ((temp_p->bios_control & BIOSMODE) == BIOSDISABLED)
{
temp_p->flags &= ~AHC_BIOS_ENABLED;
}
else
{
temp_p->flags &= ~AHC_USEDEFAULTS;
temp_p->flags |= AHC_BIOS_ENABLED;
if ( (temp_p->bios_control & 0x20) == 0 )
{
temp_p->bios_address = 0xcc000;
temp_p->bios_address += (0x4000 * (temp_p->bios_control & 0x07));
}
else
{
temp_p->bios_address = 0xd0000;
temp_p->bios_address += (0x8000 * (temp_p->bios_control & 0x06));
}
}
temp_p->adapter_control = aic_inb(temp_p, SCSICONF) << 8;
temp_p->adapter_control |= aic_inb(temp_p, SCSICONF + 1);
if (temp_p->features & AHC_WIDE)
{
temp_p->scsi_id = temp_p->adapter_control & HWSCSIID;
temp_p->scsi_id_b = temp_p->scsi_id;
}
else
{
temp_p->scsi_id = (temp_p->adapter_control >> 8) & HSCSIID;
temp_p->scsi_id_b = temp_p->adapter_control & HSCSIID;
}
aic7xxx_load_seeprom(temp_p, &sxfrctl1);
break;
}
case 2:
case 3:
temp_p->chip = AHC_AIC7770 | AHC_VL;
temp_p->features |= AHC_AIC7770_FE;
if (type == 2)
temp_p->flags |= AHC_BIOS_ENABLED;
else
temp_p->flags &= ~AHC_BIOS_ENABLED;
if (aic_inb(temp_p, SCSICONF) & TERM_ENB)
sxfrctl1 = STPWEN;
aic7xxx_load_seeprom(temp_p, &sxfrctl1);
temp_p->board_name_index = 4;
if (aic7xxx_verbose & VERBOSE_PROBE2)
printk("aic7xxx: <%s> at VLB %d\n",
board_names[2], slot);
switch( aic_inb(temp_p, STATUS_2840) & BIOS_SEL )
{
case 0x00:
temp_p->bios_address = 0xe0000;
break;
case 0x20:
temp_p->bios_address = 0xc8000;
break;
case 0x40:
temp_p->bios_address = 0xd0000;
break;
case 0x60:
temp_p->bios_address = 0xd8000;
break;
default:
break; /* can't get here */
}
break;
default: /* Won't get here. */
break;
}
if (aic7xxx_verbose & VERBOSE_PROBE2)
{
printk(KERN_INFO "aic7xxx: BIOS %sabled, IO Port 0x%lx, IRQ %d (%s)\n",
(temp_p->flags & AHC_USEDEFAULTS) ? "dis" : "en", temp_p->base,
temp_p->irq,
(temp_p->pause & IRQMS) ? "level sensitive" : "edge triggered");
printk(KERN_INFO "aic7xxx: Extended translation %sabled.\n",
(temp_p->flags & AHC_EXTEND_TRANS_A) ? "en" : "dis");
}
/*
* All the 7770 based chipsets have this bug
*/
temp_p->bugs |= AHC_BUG_TMODE_WIDEODD;
/*
* Set the FIFO threshold and the bus off time.
*/
hostconf = aic_inb(temp_p, HOSTCONF);
aic_outb(temp_p, hostconf & DFTHRSH, BUSSPD);
aic_outb(temp_p, (hostconf << 2) & BOFF, BUSTIME);
slot++;
found++;
}
#endif /* defined(__i386__) || defined(__alpha__) */
/*
* Now, we re-order the probed devices by BIOS address and BUS class.
* In general, we follow this algorithm to make the adapters show up
* in the same order under linux that the computer finds them.
* 1: All VLB/EISA cards with BIOS_ENABLED first, according to BIOS
* address, going from lowest to highest.
* 2: All PCI controllers with BIOS_ENABLED next, according to BIOS
* address, going from lowest to highest.
* 3: Remaining VLB/EISA controllers going in slot order.
* 4: Remaining PCI controllers, going in PCI device order (reversable)
*/
{
struct aic7xxx_host *sort_list[4] = { NULL, NULL, NULL, NULL };
struct aic7xxx_host *vlb, *pci;
struct aic7xxx_host *prev_p;
struct aic7xxx_host *p;
unsigned char left;
prev_p = vlb = pci = NULL;
temp_p = list_p;
while (temp_p != NULL)
{
switch(temp_p->chip & ~AHC_CHIPID_MASK)
{
case AHC_EISA:
case AHC_VL:
{
p = temp_p;
if (p->flags & AHC_BIOS_ENABLED)
vlb = sort_list[0];
else
vlb = sort_list[2];
if (vlb == NULL)
{
vlb = temp_p;
temp_p = temp_p->next;
vlb->next = NULL;
}
else
{
current_p = vlb;
prev_p = NULL;
while ( (current_p != NULL) &&
(current_p->bios_address < temp_p->bios_address))
{
prev_p = current_p;
current_p = current_p->next;
}
if (prev_p != NULL)
{
prev_p->next = temp_p;
temp_p = temp_p->next;
prev_p->next->next = current_p;
}
else
{
vlb = temp_p;
temp_p = temp_p->next;
vlb->next = current_p;
}
}
if (p->flags & AHC_BIOS_ENABLED)
sort_list[0] = vlb;
else
sort_list[2] = vlb;
break;
}
default: /* All PCI controllers fall through to default */
{
p = temp_p;
if (p->flags & AHC_BIOS_ENABLED)
pci = sort_list[1];
else
pci = sort_list[3];
if (pci == NULL)
{
pci = temp_p;
temp_p = temp_p->next;
pci->next = NULL;
}
else
{
current_p = pci;
prev_p = NULL;
if (!aic7xxx_reverse_scan)
{
while ( (current_p != NULL) &&
( (PCI_SLOT(current_p->pci_device_fn) |
(current_p->pci_bus << 8)) <
(PCI_SLOT(temp_p->pci_device_fn) |
(temp_p->pci_bus << 8)) ) )
{
prev_p = current_p;
current_p = current_p->next;
}
}
else
{
while ( (current_p != NULL) &&
( (PCI_SLOT(current_p->pci_device_fn) |
(current_p->pci_bus << 8)) >
(PCI_SLOT(temp_p->pci_device_fn) |
(temp_p->pci_bus << 8)) ) )
{
prev_p = current_p;
current_p = current_p->next;
}
}
/*
* Are we dealing with a 7895/6/7/9 where we need to sort the
* channels as well, if so, the bios_address values should
* be the same
*/
if ( (current_p) && (temp_p->flags & AHC_MULTI_CHANNEL) &&
(temp_p->pci_bus == current_p->pci_bus) &&
(PCI_SLOT(temp_p->pci_device_fn) ==
PCI_SLOT(current_p->pci_device_fn)) )
{
if (temp_p->flags & AHC_CHNLB)
{
if ( !(temp_p->flags & AHC_CHANNEL_B_PRIMARY) )
{
prev_p = current_p;
current_p = current_p->next;
}
}
else
{
if (temp_p->flags & AHC_CHANNEL_B_PRIMARY)
{
prev_p = current_p;
current_p = current_p->next;
}
}
}
if (prev_p != NULL)
{
prev_p->next = temp_p;
temp_p = temp_p->next;
prev_p->next->next = current_p;
}
else
{
pci = temp_p;
temp_p = temp_p->next;
pci->next = current_p;
}
}
if (p->flags & AHC_BIOS_ENABLED)
sort_list[1] = pci;
else
sort_list[3] = pci;
break;
}
} /* End of switch(temp_p->type) */
} /* End of while (temp_p != NULL) */
/*
* At this point, the cards have been broken into 4 sorted lists, now
* we run through the lists in order and register each controller
*/
{
int i;
left = found;
for (i=0; i<ARRAY_SIZE(sort_list); i++)
{
temp_p = sort_list[i];
while(temp_p != NULL)
{
template->name = board_names[temp_p->board_name_index];
p = aic7xxx_alloc(template, temp_p);
if (p != NULL)
{
p->instance = found - left;
if (aic7xxx_register(template, p, (--left)) == 0)
{
found--;
aic7xxx_release(p->host);
scsi_unregister(p->host);
}
else if (aic7xxx_dump_card)
{
pause_sequencer(p);
aic7xxx_print_card(p);
aic7xxx_print_scratch_ram(p);
unpause_sequencer(p, TRUE);
}
}
current_p = temp_p;
temp_p = (struct aic7xxx_host *)temp_p->next;
kfree(current_p);
}
}
}
}
return (found);
}
/*+F*************************************************************************
* Function:
* aic7xxx_buildscb
*
* Description:
* Build a SCB.
*-F*************************************************************************/
static void aic7xxx_buildscb(struct aic7xxx_host *p, struct scsi_cmnd *cmd,
struct aic7xxx_scb *scb)
{
unsigned short mask;
struct aic7xxx_hwscb *hscb;
struct aic_dev_data *aic_dev = cmd->device->hostdata;
struct scsi_device *sdptr = cmd->device;
unsigned char tindex = TARGET_INDEX(cmd);
int use_sg;
mask = (0x01 << tindex);
hscb = scb->hscb;
/*
* Setup the control byte if we need negotiation and have not
* already requested it.
*/
hscb->control = 0;
scb->tag_action = 0;
if (p->discenable & mask)
{
hscb->control |= DISCENB;
/* We always force TEST_UNIT_READY to untagged */
if (cmd->cmnd[0] != TEST_UNIT_READY && sdptr->simple_tags)
{
hscb->control |= MSG_SIMPLE_Q_TAG;
scb->tag_action = MSG_SIMPLE_Q_TAG;
}
}
if ( !(aic_dev->dtr_pending) &&
(aic_dev->needppr || aic_dev->needwdtr || aic_dev->needsdtr) &&
(aic_dev->flags & DEVICE_DTR_SCANNED) )
{
aic_dev->dtr_pending = 1;
scb->tag_action = 0;
hscb->control &= DISCENB;
hscb->control |= MK_MESSAGE;
if(aic_dev->needppr)
{
scb->flags |= SCB_MSGOUT_PPR;
}
else if(aic_dev->needwdtr)
{
scb->flags |= SCB_MSGOUT_WDTR;
}
else if(aic_dev->needsdtr)
{
scb->flags |= SCB_MSGOUT_SDTR;
}
scb->flags |= SCB_DTR_SCB;
}
hscb->target_channel_lun = ((cmd->device->id << 4) & 0xF0) |
((cmd->device->channel & 0x01) << 3) | (cmd->device->lun & 0x07);
/*
* The interpretation of request_buffer and request_bufflen
* changes depending on whether or not use_sg is zero; a
* non-zero use_sg indicates the number of elements in the
* scatter-gather array.
*/
/*
* XXX - this relies on the host data being stored in a
* little-endian format.
*/
hscb->SCSI_cmd_length = cmd->cmd_len;
memcpy(scb->cmnd, cmd->cmnd, cmd->cmd_len);
hscb->SCSI_cmd_pointer = cpu_to_le32(SCB_DMA_ADDR(scb, scb->cmnd));
use_sg = scsi_dma_map(cmd);
BUG_ON(use_sg < 0);
if (use_sg) {
struct scatterlist *sg; /* Must be mid-level SCSI code scatterlist */
/*
* We must build an SG list in adapter format, as the kernel's SG list
* cannot be used directly because of data field size (__alpha__)
* differences and the kernel SG list uses virtual addresses where
* we need physical addresses.
*/
int i;
scb->sg_length = 0;
/*
* Copy the segments into the SG array. NOTE!!! - We used to
* have the first entry both in the data_pointer area and the first
* SG element. That has changed somewhat. We still have the first
* entry in both places, but now we download the address of
* scb->sg_list[1] instead of 0 to the sg pointer in the hscb.
*/
scsi_for_each_sg(cmd, sg, use_sg, i) {
unsigned int len = sg_dma_len(sg);
scb->sg_list[i].address = cpu_to_le32(sg_dma_address(sg));
scb->sg_list[i].length = cpu_to_le32(len);
scb->sg_length += len;
}
/* Copy the first SG into the data pointer area. */
hscb->data_pointer = scb->sg_list[0].address;
hscb->data_count = scb->sg_list[0].length;
scb->sg_count = i;
hscb->SG_segment_count = i;
hscb->SG_list_pointer = cpu_to_le32(SCB_DMA_ADDR(scb, &scb->sg_list[1]));
} else {
scb->sg_count = 0;
scb->sg_length = 0;
hscb->SG_segment_count = 0;
hscb->SG_list_pointer = 0;
hscb->data_count = 0;
hscb->data_pointer = 0;
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_queue
*
* Description:
* Queue a SCB to the controller.
*-F*************************************************************************/
static int aic7xxx_queue_lck(struct scsi_cmnd *cmd, void (*fn)(struct scsi_cmnd *))
{
struct aic7xxx_host *p;
struct aic7xxx_scb *scb;
struct aic_dev_data *aic_dev;
p = (struct aic7xxx_host *) cmd->device->host->hostdata;
aic_dev = cmd->device->hostdata;
#ifdef AIC7XXX_VERBOSE_DEBUGGING
if (aic_dev->active_cmds > aic_dev->max_q_depth)
{
printk(WARN_LEAD "Commands queued exceeds queue "
"depth, active=%d\n",
p->host_no, CTL_OF_CMD(cmd),
aic_dev->active_cmds);
}
#endif
scb = scbq_remove_head(&p->scb_data->free_scbs);
if (scb == NULL)
{
aic7xxx_allocate_scb(p);
scb = scbq_remove_head(&p->scb_data->free_scbs);
if(scb == NULL)
{
printk(WARN_LEAD "Couldn't get a free SCB.\n", p->host_no,
CTL_OF_CMD(cmd));
return 1;
}
}
scb->cmd = cmd;
/*
* Make sure the scsi_cmnd pointer is saved, the struct it points to
* is set up properly, and the parity error flag is reset, then send
* the SCB to the sequencer and watch the fun begin.
*/
aic7xxx_position(cmd) = scb->hscb->tag;
cmd->scsi_done = fn;
cmd->result = DID_OK;
aic7xxx_error(cmd) = DID_OK;
aic7xxx_status(cmd) = 0;
cmd->host_scribble = NULL;
/*
* Construct the SCB beforehand, so the sequencer is
* paused a minimal amount of time.
*/
aic7xxx_buildscb(p, cmd, scb);
scb->flags |= SCB_ACTIVE | SCB_WAITINGQ;
scbq_insert_tail(&p->waiting_scbs, scb);
aic7xxx_run_waiting_queues(p);
return (0);
}
static DEF_SCSI_QCMD(aic7xxx_queue)
/*+F*************************************************************************
* Function:
* aic7xxx_bus_device_reset
*
* Description:
* Abort or reset the current SCSI command(s). If the scb has not
* previously been aborted, then we attempt to send a BUS_DEVICE_RESET
* message to the target. If the scb has previously been unsuccessfully
* aborted, then we will reset the channel and have all devices renegotiate.
* Returns an enumerated type that indicates the status of the operation.
*-F*************************************************************************/
static int __aic7xxx_bus_device_reset(struct scsi_cmnd *cmd)
{
struct aic7xxx_host *p;
struct aic7xxx_scb *scb;
struct aic7xxx_hwscb *hscb;
int channel;
unsigned char saved_scbptr, lastphase;
unsigned char hscb_index;
int disconnected;
struct aic_dev_data *aic_dev;
if(cmd == NULL)
{
printk(KERN_ERR "aic7xxx_bus_device_reset: called with NULL cmd!\n");
return FAILED;
}
p = (struct aic7xxx_host *)cmd->device->host->hostdata;
aic_dev = AIC_DEV(cmd);
if(aic7xxx_position(cmd) < p->scb_data->numscbs)
scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]);
else
return FAILED;
hscb = scb->hscb;
aic7xxx_isr(p);
aic7xxx_done_cmds_complete(p);
/* If the command was already complete or just completed, then we didn't
* do a reset, return FAILED */
if(!(scb->flags & SCB_ACTIVE))
return FAILED;
pause_sequencer(p);
lastphase = aic_inb(p, LASTPHASE);
if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
{
printk(INFO_LEAD "Bus Device reset, scb flags 0x%x, ",
p->host_no, CTL_OF_SCB(scb), scb->flags);
switch (lastphase)
{
case P_DATAOUT:
printk("Data-Out phase\n");
break;
case P_DATAIN:
printk("Data-In phase\n");
break;
case P_COMMAND:
printk("Command phase\n");
break;
case P_MESGOUT:
printk("Message-Out phase\n");
break;
case P_STATUS:
printk("Status phase\n");
break;
case P_MESGIN:
printk("Message-In phase\n");
break;
default:
/*
* We're not in a valid phase, so assume we're idle.
*/
printk("while idle, LASTPHASE = 0x%x\n", lastphase);
break;
}
printk(INFO_LEAD "SCSISIGI 0x%x, SEQADDR 0x%x, SSTAT0 0x%x, SSTAT1 "
"0x%x\n", p->host_no, CTL_OF_SCB(scb),
aic_inb(p, SCSISIGI),
aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
aic_inb(p, SSTAT0), aic_inb(p, SSTAT1));
printk(INFO_LEAD "SG_CACHEPTR 0x%x, SSTAT2 0x%x, STCNT 0x%x\n", p->host_no,
CTL_OF_SCB(scb),
(p->features & AHC_ULTRA2) ? aic_inb(p, SG_CACHEPTR) : 0,
aic_inb(p, SSTAT2),
aic_inb(p, STCNT + 2) << 16 | aic_inb(p, STCNT + 1) << 8 |
aic_inb(p, STCNT));
}
channel = cmd->device->channel;
/*
* Send a Device Reset Message:
* The target that is holding up the bus may not be the same as
* the one that triggered this timeout (different commands have
* different timeout lengths). Our strategy here is to queue an
* abort message to the timed out target if it is disconnected.
* Otherwise, if we have an active target we stuff the message buffer
* with an abort message and assert ATN in the hopes that the target
* will let go of the bus and go to the mesgout phase. If this
* fails, we'll get another timeout a few seconds later which will
* attempt a bus reset.
*/
saved_scbptr = aic_inb(p, SCBPTR);
disconnected = FALSE;
if (lastphase != P_BUSFREE)
{
if (aic_inb(p, SCB_TAG) >= p->scb_data->numscbs)
{
printk(WARN_LEAD "Invalid SCB ID %d is active, "
"SCB flags = 0x%x.\n", p->host_no,
CTL_OF_CMD(cmd), scb->hscb->tag, scb->flags);
unpause_sequencer(p, FALSE);
return FAILED;
}
if (scb->hscb->tag == aic_inb(p, SCB_TAG))
{
if ( (lastphase == P_MESGOUT) || (lastphase == P_MESGIN) )
{
printk(WARN_LEAD "Device reset, Message buffer "
"in use\n", p->host_no, CTL_OF_SCB(scb));
unpause_sequencer(p, FALSE);
return FAILED;
}
if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
printk(INFO_LEAD "Device reset message in "
"message buffer\n", p->host_no, CTL_OF_SCB(scb));
scb->flags |= SCB_RESET | SCB_DEVICE_RESET;
aic7xxx_error(cmd) = DID_RESET;
aic_dev->flags |= BUS_DEVICE_RESET_PENDING;
/* Send the abort message to the active SCB. */
aic_outb(p, HOST_MSG, MSG_OUT);
aic_outb(p, lastphase | ATNO, SCSISIGO);
unpause_sequencer(p, FALSE);
spin_unlock_irq(p->host->host_lock);
ssleep(1);
spin_lock_irq(p->host->host_lock);
if(aic_dev->flags & BUS_DEVICE_RESET_PENDING)
return FAILED;
else
return SUCCESS;
}
} /* if (last_phase != P_BUSFREE).....indicates we are idle and can work */
/*
* Simply set the MK_MESSAGE flag and the SEQINT handler will do
* the rest on a reconnect/connect.
*/
scb->hscb->control |= MK_MESSAGE;
scb->flags |= SCB_RESET | SCB_DEVICE_RESET;
aic_dev->flags |= BUS_DEVICE_RESET_PENDING;
/*
* Check to see if the command is on the qinfifo. If it is, then we will
* not need to queue the command again since the card should start it soon
*/
if (aic7xxx_search_qinfifo(p, cmd->device->channel, cmd->device->id, cmd->device->lun, hscb->tag,
0, TRUE, NULL) == 0)
{
disconnected = TRUE;
if ((hscb_index = aic7xxx_find_scb(p, scb)) != SCB_LIST_NULL)
{
unsigned char scb_control;
aic_outb(p, hscb_index, SCBPTR);
scb_control = aic_inb(p, SCB_CONTROL);
/*
* If the DISCONNECTED bit is not set in SCB_CONTROL, then we are
* actually on the waiting list, not disconnected, and we don't
* need to requeue the command.
*/
disconnected = (scb_control & DISCONNECTED);
aic_outb(p, scb_control | MK_MESSAGE, SCB_CONTROL);
}
if (disconnected)
{
/*
* Actually requeue this SCB in case we can select the
* device before it reconnects. This can result in the command
* being on the qinfifo twice, but we don't care because it will
* all get cleaned up if/when the reset takes place.
*/
if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
printk(INFO_LEAD "Queueing device reset command.\n", p->host_no,
CTL_OF_SCB(scb));
p->qinfifo[p->qinfifonext++] = scb->hscb->tag;
if (p->features & AHC_QUEUE_REGS)
aic_outb(p, p->qinfifonext, HNSCB_QOFF);
else
aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
scb->flags |= SCB_QUEUED_ABORT;
}
}
aic_outb(p, saved_scbptr, SCBPTR);
unpause_sequencer(p, FALSE);
spin_unlock_irq(p->host->host_lock);
msleep(1000/4);
spin_lock_irq(p->host->host_lock);
if(aic_dev->flags & BUS_DEVICE_RESET_PENDING)
return FAILED;
else
return SUCCESS;
}
static int aic7xxx_bus_device_reset(struct scsi_cmnd *cmd)
{
int rc;
spin_lock_irq(cmd->device->host->host_lock);
rc = __aic7xxx_bus_device_reset(cmd);
spin_unlock_irq(cmd->device->host->host_lock);
return rc;
}
/*+F*************************************************************************
* Function:
* aic7xxx_panic_abort
*
* Description:
* Abort the current SCSI command(s).
*-F*************************************************************************/
static void aic7xxx_panic_abort(struct aic7xxx_host *p, struct scsi_cmnd *cmd)
{
printk("aic7xxx driver version %s\n", AIC7XXX_C_VERSION);
printk("Controller type:\n %s\n", board_names[p->board_name_index]);
printk("p->flags=0x%lx, p->chip=0x%x, p->features=0x%x, "
"sequencer %s paused\n",
p->flags, p->chip, p->features,
(aic_inb(p, HCNTRL) & PAUSE) ? "is" : "isn't" );
pause_sequencer(p);
disable_irq(p->irq);
aic7xxx_print_card(p);
aic7xxx_print_scratch_ram(p);
spin_unlock_irq(p->host->host_lock);
for(;;) barrier();
}
/*+F*************************************************************************
* Function:
* aic7xxx_abort
*
* Description:
* Abort the current SCSI command(s).
*-F*************************************************************************/
static int __aic7xxx_abort(struct scsi_cmnd *cmd)
{
struct aic7xxx_scb *scb = NULL;
struct aic7xxx_host *p;
int found=0, disconnected;
unsigned char saved_hscbptr, hscbptr, scb_control;
struct aic_dev_data *aic_dev;
if(cmd == NULL)
{
printk(KERN_ERR "aic7xxx_abort: called with NULL cmd!\n");
return FAILED;
}
p = (struct aic7xxx_host *)cmd->device->host->hostdata;
aic_dev = AIC_DEV(cmd);
if(aic7xxx_position(cmd) < p->scb_data->numscbs)
scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]);
else
return FAILED;
aic7xxx_isr(p);
aic7xxx_done_cmds_complete(p);
/* If the command was already complete or just completed, then we didn't
* do a reset, return FAILED */
if(!(scb->flags & SCB_ACTIVE))
return FAILED;
pause_sequencer(p);
/*
* I added a new config option to the driver: "panic_on_abort" that will
* cause the driver to panic and the machine to stop on the first abort
* or reset call into the driver. At that point, it prints out a lot of
* useful information for me which I can then use to try and debug the
* problem. Simply enable the boot time prompt in order to activate this
* code.
*/
if (aic7xxx_panic_on_abort)
aic7xxx_panic_abort(p, cmd);
if (aic7xxx_verbose & VERBOSE_ABORT)
{
printk(INFO_LEAD "Aborting scb %d, flags 0x%x, SEQADDR 0x%x, LASTPHASE "
"0x%x\n",
p->host_no, CTL_OF_SCB(scb), scb->hscb->tag, scb->flags,
aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
aic_inb(p, LASTPHASE));
printk(INFO_LEAD "SG_CACHEPTR 0x%x, SG_COUNT %d, SCSISIGI 0x%x\n",
p->host_no, CTL_OF_SCB(scb), (p->features & AHC_ULTRA2) ?
aic_inb(p, SG_CACHEPTR) : 0, aic_inb(p, SG_COUNT),
aic_inb(p, SCSISIGI));
printk(INFO_LEAD "SSTAT0 0x%x, SSTAT1 0x%x, SSTAT2 0x%x\n",
p->host_no, CTL_OF_SCB(scb), aic_inb(p, SSTAT0),
aic_inb(p, SSTAT1), aic_inb(p, SSTAT2));
}
if (scb->flags & SCB_WAITINGQ)
{
if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
printk(INFO_LEAD "SCB found on waiting list and "
"aborted.\n", p->host_no, CTL_OF_SCB(scb));
scbq_remove(&p->waiting_scbs, scb);
scbq_remove(&aic_dev->delayed_scbs, scb);
aic_dev->active_cmds++;
p->activescbs++;
scb->flags &= ~(SCB_WAITINGQ | SCB_ACTIVE);
scb->flags |= SCB_ABORT | SCB_QUEUED_FOR_DONE;
goto success;
}
/*
* We just checked the waiting_q, now for the QINFIFO
*/
if ( ((found = aic7xxx_search_qinfifo(p, cmd->device->id, cmd->device->channel,
cmd->device->lun, scb->hscb->tag, SCB_ABORT | SCB_QUEUED_FOR_DONE,
FALSE, NULL)) != 0) &&
(aic7xxx_verbose & VERBOSE_ABORT_PROCESS))
{
printk(INFO_LEAD "SCB found in QINFIFO and aborted.\n", p->host_no,
CTL_OF_SCB(scb));
goto success;
}
/*
* QINFIFO, waitingq, completeq done. Next, check WAITING_SCB list in card
*/
saved_hscbptr = aic_inb(p, SCBPTR);
if ((hscbptr = aic7xxx_find_scb(p, scb)) != SCB_LIST_NULL)
{
aic_outb(p, hscbptr, SCBPTR);
scb_control = aic_inb(p, SCB_CONTROL);
disconnected = scb_control & DISCONNECTED;
/*
* If the DISCONNECTED bit is not set in SCB_CONTROL, then we are
* either currently active or on the waiting list.
*/
if(!disconnected && aic_inb(p, LASTPHASE) == P_BUSFREE) {
if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
printk(INFO_LEAD "SCB found on hardware waiting"
" list and aborted.\n", p->host_no, CTL_OF_SCB(scb));
/* If we are the only waiting command, stop the selection engine */
if (aic_inb(p, WAITING_SCBH) == hscbptr && aic_inb(p, SCB_NEXT) ==
SCB_LIST_NULL)
{
aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ);
aic_outb(p, CLRSELTIMEO, CLRSINT1);
aic_outb(p, SCB_LIST_NULL, WAITING_SCBH);
}
else
{
unsigned char prev, next;
prev = SCB_LIST_NULL;
next = aic_inb(p, WAITING_SCBH);
while(next != SCB_LIST_NULL)
{
aic_outb(p, next, SCBPTR);
if (next == hscbptr)
{
next = aic_inb(p, SCB_NEXT);
if (prev != SCB_LIST_NULL)
{
aic_outb(p, prev, SCBPTR);
aic_outb(p, next, SCB_NEXT);
}
else
aic_outb(p, next, WAITING_SCBH);
aic_outb(p, hscbptr, SCBPTR);
next = SCB_LIST_NULL;
}
else
{
prev = next;
next = aic_inb(p, SCB_NEXT);
}
}
}
aic_outb(p, SCB_LIST_NULL, SCB_TAG);
aic_outb(p, 0, SCB_CONTROL);
aic7xxx_add_curscb_to_free_list(p);
scb->flags = SCB_ABORT | SCB_QUEUED_FOR_DONE;
goto success;
}
else if (!disconnected)
{
/*
* We are the currently active command
*/
if((aic_inb(p, LASTPHASE) == P_MESGIN) ||
(aic_inb(p, LASTPHASE) == P_MESGOUT))
{
/*
* Message buffer busy, unable to abort
*/
printk(INFO_LEAD "message buffer busy, unable to abort.\n",
p->host_no, CTL_OF_SCB(scb));
unpause_sequencer(p, FALSE);
return FAILED;
}
/* Fallthrough to below, set ATNO after we set SCB_CONTROL */
}
aic_outb(p, scb_control | MK_MESSAGE, SCB_CONTROL);
if(!disconnected)
{
aic_outb(p, HOST_MSG, MSG_OUT);
aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO);
}
aic_outb(p, saved_hscbptr, SCBPTR);
}
else
{
/*
* The scb isn't in the card at all and it is active and it isn't in
* any of the queues, so it must be disconnected and paged out. Fall
* through to the code below.
*/
disconnected = 1;
}
p->flags |= AHC_ABORT_PENDING;
scb->flags |= SCB_QUEUED_ABORT | SCB_ABORT | SCB_RECOVERY_SCB;
scb->hscb->control |= MK_MESSAGE;
if(disconnected)
{
if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
printk(INFO_LEAD "SCB disconnected. Queueing Abort"
" SCB.\n", p->host_no, CTL_OF_SCB(scb));
p->qinfifo[p->qinfifonext++] = scb->hscb->tag;
if (p->features & AHC_QUEUE_REGS)
aic_outb(p, p->qinfifonext, HNSCB_QOFF);
else
aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
}
unpause_sequencer(p, FALSE);
spin_unlock_irq(p->host->host_lock);
msleep(1000/4);
spin_lock_irq(p->host->host_lock);
if (p->flags & AHC_ABORT_PENDING)
{
if (aic7xxx_verbose & VERBOSE_ABORT_RETURN)
printk(INFO_LEAD "Abort never delivered, returning FAILED\n", p->host_no,
CTL_OF_CMD(cmd));
p->flags &= ~AHC_ABORT_PENDING;
return FAILED;
}
if (aic7xxx_verbose & VERBOSE_ABORT_RETURN)
printk(INFO_LEAD "Abort successful.\n", p->host_no, CTL_OF_CMD(cmd));
return SUCCESS;
success:
if (aic7xxx_verbose & VERBOSE_ABORT_RETURN)
printk(INFO_LEAD "Abort successful.\n", p->host_no, CTL_OF_CMD(cmd));
aic7xxx_run_done_queue(p, TRUE);
unpause_sequencer(p, FALSE);
return SUCCESS;
}
static int aic7xxx_abort(struct scsi_cmnd *cmd)
{
int rc;
spin_lock_irq(cmd->device->host->host_lock);
rc = __aic7xxx_abort(cmd);
spin_unlock_irq(cmd->device->host->host_lock);
return rc;
}
/*+F*************************************************************************
* Function:
* aic7xxx_reset
*
* Description:
* Resetting the bus always succeeds - is has to, otherwise the
* kernel will panic! Try a surgical technique - sending a BUS
* DEVICE RESET message - on the offending target before pulling
* the SCSI bus reset line.
*-F*************************************************************************/
static int aic7xxx_reset(struct scsi_cmnd *cmd)
{
struct aic7xxx_scb *scb;
struct aic7xxx_host *p;
struct aic_dev_data *aic_dev;
p = (struct aic7xxx_host *) cmd->device->host->hostdata;
spin_lock_irq(p->host->host_lock);
aic_dev = AIC_DEV(cmd);
if(aic7xxx_position(cmd) < p->scb_data->numscbs)
{
scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]);
if (scb->cmd != cmd)
scb = NULL;
}
else
{
scb = NULL;
}
/*
* I added a new config option to the driver: "panic_on_abort" that will
* cause the driver to panic and the machine to stop on the first abort
* or reset call into the driver. At that point, it prints out a lot of
* useful information for me which I can then use to try and debug the
* problem. Simply enable the boot time prompt in order to activate this
* code.
*/
if (aic7xxx_panic_on_abort)
aic7xxx_panic_abort(p, cmd);
pause_sequencer(p);
while((aic_inb(p, INTSTAT) & INT_PEND) && !(p->flags & AHC_IN_ISR))
{
aic7xxx_isr(p);
pause_sequencer(p);
}
aic7xxx_done_cmds_complete(p);
if(scb && (scb->cmd == NULL))
{
/*
* We just completed the command when we ran the isr stuff, so we no
* longer have it.
*/
unpause_sequencer(p, FALSE);
spin_unlock_irq(p->host->host_lock);
return SUCCESS;
}
/*
* By this point, we want to already know what we are going to do and
* only have the following code implement our course of action.
*/
aic7xxx_reset_channel(p, cmd->device->channel, TRUE);
if (p->features & AHC_TWIN)
{
aic7xxx_reset_channel(p, cmd->device->channel ^ 0x01, TRUE);
restart_sequencer(p);
}
aic_outb(p, aic_inb(p, SIMODE1) & ~(ENREQINIT|ENBUSFREE), SIMODE1);
aic7xxx_clear_intstat(p);
p->flags &= ~AHC_HANDLING_REQINITS;
p->msg_type = MSG_TYPE_NONE;
p->msg_index = 0;
p->msg_len = 0;
aic7xxx_run_done_queue(p, TRUE);
unpause_sequencer(p, FALSE);
spin_unlock_irq(p->host->host_lock);
ssleep(2);
return SUCCESS;
}
/*+F*************************************************************************
* Function:
* aic7xxx_biosparam
*
* Description:
* Return the disk geometry for the given SCSI device.
*
* Note:
* This function is broken for today's really large drives and needs
* fixed.
*-F*************************************************************************/
static int
aic7xxx_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
sector_t heads, sectors, cylinders;
int ret;
struct aic7xxx_host *p;
unsigned char *buf;
p = (struct aic7xxx_host *) sdev->host->hostdata;
buf = scsi_bios_ptable(bdev);
if ( buf )
{
ret = scsi_partsize(buf, capacity, &geom[2], &geom[0], &geom[1]);
kfree(buf);
if ( ret != -1 )
return(ret);
}
heads = 64;
sectors = 32;
cylinders = capacity >> 11;
if ((p->flags & AHC_EXTEND_TRANS_A) && (cylinders > 1024))
{
heads = 255;
sectors = 63;
cylinders = capacity >> 14;
if(capacity > (65535 * heads * sectors))
cylinders = 65535;
else
cylinders = ((unsigned int)capacity) / (unsigned int)(heads * sectors);
}
geom[0] = (int)heads;
geom[1] = (int)sectors;
geom[2] = (int)cylinders;
return (0);
}
/*+F*************************************************************************
* Function:
* aic7xxx_release
*
* Description:
* Free the passed in Scsi_Host memory structures prior to unloading the
* module.
*-F*************************************************************************/
static int
aic7xxx_release(struct Scsi_Host *host)
{
struct aic7xxx_host *p = (struct aic7xxx_host *) host->hostdata;
struct aic7xxx_host *next, *prev;
if(p->irq)
free_irq(p->irq, p);
#ifdef MMAPIO
if(p->maddr)
{
iounmap(p->maddr);
}
#endif /* MMAPIO */
if(!p->pdev)
release_region(p->base, MAXREG - MINREG);
#ifdef CONFIG_PCI
else {
pci_release_regions(p->pdev);
pci_dev_put(p->pdev);
}
#endif
prev = NULL;
next = first_aic7xxx;
while(next != NULL)
{
if(next == p)
{
if(prev == NULL)
first_aic7xxx = next->next;
else
prev->next = next->next;
}
else
{
prev = next;
}
next = next->next;
}
aic7xxx_free(p);
return(0);
}
/*+F*************************************************************************
* Function:
* aic7xxx_print_card
*
* Description:
* Print out all of the control registers on the card
*
* NOTE: This function is not yet safe for use on the VLB and EISA
* controllers, so it isn't used on those controllers at all.
*-F*************************************************************************/
static void
aic7xxx_print_card(struct aic7xxx_host *p)
{
int i, j, k, chip;
static struct register_ranges {
int num_ranges;
int range_val[32];
} cards_ds[] = {
{ 0, {0,} }, /* none */
{10, {0x00, 0x05, 0x08, 0x11, 0x18, 0x19, 0x1f, 0x1f, 0x60, 0x60, /*7771*/
0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9b, 0x9f} },
{ 9, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7850*/
0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} },
{ 9, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7860*/
0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} },
{10, {0x00, 0x05, 0x08, 0x11, 0x18, 0x19, 0x1c, 0x1f, 0x60, 0x60, /*7870*/
0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} },
{10, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1a, 0x1c, 0x1f, 0x60, 0x60, /*7880*/
0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} },
{16, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7890*/
0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9f, 0x9f,
0xe0, 0xf1, 0xf4, 0xf4, 0xf6, 0xf6, 0xf8, 0xf8, 0xfa, 0xfc,
0xfe, 0xff} },
{12, {0x00, 0x05, 0x08, 0x11, 0x18, 0x19, 0x1b, 0x1f, 0x60, 0x60, /*7895*/
0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a,
0x9f, 0x9f, 0xe0, 0xf1} },
{16, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7896*/
0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9f, 0x9f,
0xe0, 0xf1, 0xf4, 0xf4, 0xf6, 0xf6, 0xf8, 0xf8, 0xfa, 0xfc,
0xfe, 0xff} },
{12, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7892*/
0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9c, 0x9f,
0xe0, 0xf1, 0xf4, 0xfc} },
{12, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7899*/
0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9c, 0x9f,
0xe0, 0xf1, 0xf4, 0xfc} },
};
chip = p->chip & AHC_CHIPID_MASK;
printk("%s at ",
board_names[p->board_name_index]);
switch(p->chip & ~AHC_CHIPID_MASK)
{
case AHC_VL:
printk("VLB Slot %d.\n", p->pci_device_fn);
break;
case AHC_EISA:
printk("EISA Slot %d.\n", p->pci_device_fn);
break;
case AHC_PCI:
default:
printk("PCI %d/%d/%d.\n", p->pci_bus, PCI_SLOT(p->pci_device_fn),
PCI_FUNC(p->pci_device_fn));
break;
}
/*
* the registers on the card....
*/
printk("Card Dump:\n");
k = 0;
for(i=0; i<cards_ds[chip].num_ranges; i++)
{
for(j = cards_ds[chip].range_val[ i * 2 ];
j <= cards_ds[chip].range_val[ i * 2 + 1 ] ;
j++)
{
printk("%02x:%02x ", j, aic_inb(p, j));
if(++k == 13)
{
printk("\n");
k=0;
}
}
}
if(k != 0)
printk("\n");
/*
* If this was an Ultra2 controller, then we just hosed the card in terms
* of the QUEUE REGS. This function is only called at init time or by
* the panic_abort function, so it's safe to assume a generic init time
* setting here
*/
if(p->features & AHC_QUEUE_REGS)
{
aic_outb(p, 0, SDSCB_QOFF);
aic_outb(p, 0, SNSCB_QOFF);
aic_outb(p, 0, HNSCB_QOFF);
}
}
/*+F*************************************************************************
* Function:
* aic7xxx_print_scratch_ram
*
* Description:
* Print out the scratch RAM values on the card.
*-F*************************************************************************/
static void
aic7xxx_print_scratch_ram(struct aic7xxx_host *p)
{
int i, k;
k = 0;
printk("Scratch RAM:\n");
for(i = SRAM_BASE; i < SEQCTL; i++)
{
printk("%02x:%02x ", i, aic_inb(p, i));
if(++k == 13)
{
printk("\n");
k=0;
}
}
if (p->features & AHC_MORE_SRAM)
{
for(i = TARG_OFFSET; i < 0x80; i++)
{
printk("%02x:%02x ", i, aic_inb(p, i));
if(++k == 13)
{
printk("\n");
k=0;
}
}
}
printk("\n");
}
#include "aic7xxx_old/aic7xxx_proc.c"
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(AIC7XXX_H_VERSION);
static struct scsi_host_template driver_template = {
.proc_info = aic7xxx_proc_info,
.detect = aic7xxx_detect,
.release = aic7xxx_release,
.info = aic7xxx_info,
.queuecommand = aic7xxx_queue,
.slave_alloc = aic7xxx_slave_alloc,
.slave_configure = aic7xxx_slave_configure,
.slave_destroy = aic7xxx_slave_destroy,
.bios_param = aic7xxx_biosparam,
.eh_abort_handler = aic7xxx_abort,
.eh_device_reset_handler = aic7xxx_bus_device_reset,
.eh_host_reset_handler = aic7xxx_reset,
.can_queue = 255,
.this_id = -1,
.max_sectors = 2048,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
};
#include "scsi_module.c"
/*
* Overrides for Emacs so that we almost follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-indent-level: 2
* c-brace-imaginary-offset: 0
* c-brace-offset: -2
* c-argdecl-indent: 2
* c-label-offset: -2
* c-continued-statement-offset: 2
* c-continued-brace-offset: 0
* indent-tabs-mode: nil
* tab-width: 8
* End:
*/
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