mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-20 16:30:53 +00:00
6d416e6173
- This patch depends on:
usb: transport.c use scsi_eh API in REQUEST_SENSE execution
- Use scsi data accessors and remove of !use_sg code path.
- New usb_stor_bulk_srb() for use by drivers
[jejb: updated with corrective fix.
had a bug in residual handling in the new usb_stor_bulk_srb()
function. Found by Gabriel C. in -mm tree.
Tested-by: Gabriel C <nix.or.die@googlemail.com>
]
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Acked-by: Matthew Dharm <mdharm-scsi@one-eyed-alien.net>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
147 lines
5.2 KiB
C
147 lines
5.2 KiB
C
/* Driver for USB Mass Storage compliant devices
|
|
* Transport Functions Header File
|
|
*
|
|
* $Id: transport.h,v 1.18 2002/04/21 02:57:59 mdharm Exp $
|
|
*
|
|
* Current development and maintenance by:
|
|
* (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
|
|
*
|
|
* This driver is based on the 'USB Mass Storage Class' document. This
|
|
* describes in detail the protocol used to communicate with such
|
|
* devices. Clearly, the designers had SCSI and ATAPI commands in
|
|
* mind when they created this document. The commands are all very
|
|
* similar to commands in the SCSI-II and ATAPI specifications.
|
|
*
|
|
* It is important to note that in a number of cases this class
|
|
* exhibits class-specific exemptions from the USB specification.
|
|
* Notably the usage of NAK, STALL and ACK differs from the norm, in
|
|
* that they are used to communicate wait, failed and OK on commands.
|
|
*
|
|
* Also, for certain devices, the interrupt endpoint is used to convey
|
|
* status of a command.
|
|
*
|
|
* Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
|
|
* information about this driver.
|
|
*
|
|
* 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; if not, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#ifndef _TRANSPORT_H_
|
|
#define _TRANSPORT_H_
|
|
|
|
#include <linux/blkdev.h>
|
|
|
|
/*
|
|
* Bulk only data structures
|
|
*/
|
|
|
|
/* command block wrapper */
|
|
struct bulk_cb_wrap {
|
|
__le32 Signature; /* contains 'USBC' */
|
|
__u32 Tag; /* unique per command id */
|
|
__le32 DataTransferLength; /* size of data */
|
|
__u8 Flags; /* direction in bit 0 */
|
|
__u8 Lun; /* LUN normally 0 */
|
|
__u8 Length; /* of of the CDB */
|
|
__u8 CDB[16]; /* max command */
|
|
};
|
|
|
|
#define US_BULK_CB_WRAP_LEN 31
|
|
#define US_BULK_CB_SIGN 0x43425355 /*spells out USBC */
|
|
#define US_BULK_FLAG_IN 1
|
|
#define US_BULK_FLAG_OUT 0
|
|
|
|
/* command status wrapper */
|
|
struct bulk_cs_wrap {
|
|
__le32 Signature; /* should = 'USBS' */
|
|
__u32 Tag; /* same as original command */
|
|
__le32 Residue; /* amount not transferred */
|
|
__u8 Status; /* see below */
|
|
__u8 Filler[18];
|
|
};
|
|
|
|
#define US_BULK_CS_WRAP_LEN 13
|
|
#define US_BULK_CS_SIGN 0x53425355 /* spells out 'USBS' */
|
|
#define US_BULK_STAT_OK 0
|
|
#define US_BULK_STAT_FAIL 1
|
|
#define US_BULK_STAT_PHASE 2
|
|
|
|
/* bulk-only class specific requests */
|
|
#define US_BULK_RESET_REQUEST 0xff
|
|
#define US_BULK_GET_MAX_LUN 0xfe
|
|
|
|
/*
|
|
* usb_stor_bulk_transfer_xxx() return codes, in order of severity
|
|
*/
|
|
|
|
#define USB_STOR_XFER_GOOD 0 /* good transfer */
|
|
#define USB_STOR_XFER_SHORT 1 /* transferred less than expected */
|
|
#define USB_STOR_XFER_STALLED 2 /* endpoint stalled */
|
|
#define USB_STOR_XFER_LONG 3 /* device tried to send too much */
|
|
#define USB_STOR_XFER_ERROR 4 /* transfer died in the middle */
|
|
|
|
/*
|
|
* Transport return codes
|
|
*/
|
|
|
|
#define USB_STOR_TRANSPORT_GOOD 0 /* Transport good, command good */
|
|
#define USB_STOR_TRANSPORT_FAILED 1 /* Transport good, command failed */
|
|
#define USB_STOR_TRANSPORT_NO_SENSE 2 /* Command failed, no auto-sense */
|
|
#define USB_STOR_TRANSPORT_ERROR 3 /* Transport bad (i.e. device dead) */
|
|
|
|
/*
|
|
* We used to have USB_STOR_XFER_ABORTED and USB_STOR_TRANSPORT_ABORTED
|
|
* return codes. But now the transport and low-level transfer routines
|
|
* treat an abort as just another error (-ENOENT for a cancelled URB).
|
|
* It is up to the invoke_transport() function to test for aborts and
|
|
* distinguish them from genuine communication errors.
|
|
*/
|
|
|
|
/*
|
|
* CBI accept device specific command
|
|
*/
|
|
|
|
#define US_CBI_ADSC 0
|
|
|
|
extern int usb_stor_CBI_transport(struct scsi_cmnd *, struct us_data*);
|
|
|
|
extern int usb_stor_CB_transport(struct scsi_cmnd *, struct us_data*);
|
|
extern int usb_stor_CB_reset(struct us_data*);
|
|
|
|
extern int usb_stor_Bulk_transport(struct scsi_cmnd *, struct us_data*);
|
|
extern int usb_stor_Bulk_max_lun(struct us_data*);
|
|
extern int usb_stor_Bulk_reset(struct us_data*);
|
|
|
|
extern void usb_stor_invoke_transport(struct scsi_cmnd *, struct us_data*);
|
|
extern void usb_stor_stop_transport(struct us_data*);
|
|
|
|
extern int usb_stor_control_msg(struct us_data *us, unsigned int pipe,
|
|
u8 request, u8 requesttype, u16 value, u16 index,
|
|
void *data, u16 size, int timeout);
|
|
extern int usb_stor_clear_halt(struct us_data *us, unsigned int pipe);
|
|
|
|
extern int usb_stor_ctrl_transfer(struct us_data *us, unsigned int pipe,
|
|
u8 request, u8 requesttype, u16 value, u16 index,
|
|
void *data, u16 size);
|
|
extern int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe,
|
|
void *buf, unsigned int length, unsigned int *act_len);
|
|
extern int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe,
|
|
void *buf, unsigned int length, int use_sg, int *residual);
|
|
extern int usb_stor_bulk_srb(struct us_data* us, unsigned int pipe,
|
|
struct scsi_cmnd* srb);
|
|
|
|
extern int usb_stor_port_reset(struct us_data *us);
|
|
#endif
|