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linux/arch/s390/include/asm/cio.h
Heiko Carstens a53c8fab3f s390/comments: unify copyright messages and remove file names 
Remove the file name from the comment at top of many files. In most
cases the file name was wrong anyway, so it's rather pointless.

Also unify the IBM copyright statement. We did have a lot of sightly
different statements and wanted to change them one after another
whenever a file gets touched. However that never happened. Instead
people start to take the old/"wrong" statements to use as a template
for new files.
So unify all of them in one go.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2012-07-20 11:15:04 +02:00

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/*
* Common interface for I/O on S/390
*/
#ifndef _ASM_S390_CIO_H_
#define _ASM_S390_CIO_H_
#include <linux/spinlock.h>
#include <asm/types.h>
#define LPM_ANYPATH 0xff
#define __MAX_CSSID 0
#include <asm/scsw.h>
/**
* struct ccw1 - channel command word
* @cmd_code: command code
* @flags: flags, like IDA addressing, etc.
* @count: byte count
* @cda: data address
*
* The ccw is the basic structure to build channel programs that perform
* operations with the device or the control unit. Only Format-1 channel
* command words are supported.
*/
struct ccw1 {
__u8 cmd_code;
__u8 flags;
__u16 count;
__u32 cda;
} __attribute__ ((packed,aligned(8)));
#define CCW_FLAG_DC 0x80
#define CCW_FLAG_CC 0x40
#define CCW_FLAG_SLI 0x20
#define CCW_FLAG_SKIP 0x10
#define CCW_FLAG_PCI 0x08
#define CCW_FLAG_IDA 0x04
#define CCW_FLAG_SUSPEND 0x02
#define CCW_CMD_READ_IPL 0x02
#define CCW_CMD_NOOP 0x03
#define CCW_CMD_BASIC_SENSE 0x04
#define CCW_CMD_TIC 0x08
#define CCW_CMD_STLCK 0x14
#define CCW_CMD_SENSE_PGID 0x34
#define CCW_CMD_SUSPEND_RECONN 0x5B
#define CCW_CMD_RDC 0x64
#define CCW_CMD_RELEASE 0x94
#define CCW_CMD_SET_PGID 0xAF
#define CCW_CMD_SENSE_ID 0xE4
#define CCW_CMD_DCTL 0xF3
#define SENSE_MAX_COUNT 0x20
/**
* struct erw - extended report word
* @res0: reserved
* @auth: authorization check
* @pvrf: path-verification-required flag
* @cpt: channel-path timeout
* @fsavf: failing storage address validity flag
* @cons: concurrent sense
* @scavf: secondary ccw address validity flag
* @fsaf: failing storage address format
* @scnt: sense count, if @cons == %1
* @res16: reserved
*/
struct erw {
__u32 res0 : 3;
__u32 auth : 1;
__u32 pvrf : 1;
__u32 cpt : 1;
__u32 fsavf : 1;
__u32 cons : 1;
__u32 scavf : 1;
__u32 fsaf : 1;
__u32 scnt : 6;
__u32 res16 : 16;
} __attribute__ ((packed));
/**
* struct sublog - subchannel logout area
* @res0: reserved
* @esf: extended status flags
* @lpum: last path used mask
* @arep: ancillary report
* @fvf: field-validity flags
* @sacc: storage access code
* @termc: termination code
* @devsc: device-status check
* @serr: secondary error
* @ioerr: i/o-error alert
* @seqc: sequence code
*/
struct sublog {
__u32 res0 : 1;
__u32 esf : 7;
__u32 lpum : 8;
__u32 arep : 1;
__u32 fvf : 5;
__u32 sacc : 2;
__u32 termc : 2;
__u32 devsc : 1;
__u32 serr : 1;
__u32 ioerr : 1;
__u32 seqc : 3;
} __attribute__ ((packed));
/**
* struct esw0 - Format 0 Extended Status Word (ESW)
* @sublog: subchannel logout
* @erw: extended report word
* @faddr: failing storage address
* @saddr: secondary ccw address
*/
struct esw0 {
struct sublog sublog;
struct erw erw;
__u32 faddr[2];
__u32 saddr;
} __attribute__ ((packed));
/**
* struct esw1 - Format 1 Extended Status Word (ESW)
* @zero0: reserved zeros
* @lpum: last path used mask
* @zero16: reserved zeros
* @erw: extended report word
* @zeros: three fullwords of zeros
*/
struct esw1 {
__u8 zero0;
__u8 lpum;
__u16 zero16;
struct erw erw;
__u32 zeros[3];
} __attribute__ ((packed));
/**
* struct esw2 - Format 2 Extended Status Word (ESW)
* @zero0: reserved zeros
* @lpum: last path used mask
* @dcti: device-connect-time interval
* @erw: extended report word
* @zeros: three fullwords of zeros
*/
struct esw2 {
__u8 zero0;
__u8 lpum;
__u16 dcti;
struct erw erw;
__u32 zeros[3];
} __attribute__ ((packed));
/**
* struct esw3 - Format 3 Extended Status Word (ESW)
* @zero0: reserved zeros
* @lpum: last path used mask
* @res: reserved
* @erw: extended report word
* @zeros: three fullwords of zeros
*/
struct esw3 {
__u8 zero0;
__u8 lpum;
__u16 res;
struct erw erw;
__u32 zeros[3];
} __attribute__ ((packed));
/**
* struct irb - interruption response block
* @scsw: subchannel status word
* @esw: extened status word, 4 formats
* @ecw: extended control word
*
* The irb that is handed to the device driver when an interrupt occurs. For
* solicited interrupts, the common I/O layer already performs checks whether
* a field is valid; a field not being valid is always passed as %0.
* If a unit check occurred, @ecw may contain sense data; this is retrieved
* by the common I/O layer itself if the device doesn't support concurrent
* sense (so that the device driver never needs to perform basic sene itself).
* For unsolicited interrupts, the irb is passed as-is (expect for sense data,
* if applicable).
*/
struct irb {
union scsw scsw;
union {
struct esw0 esw0;
struct esw1 esw1;
struct esw2 esw2;
struct esw3 esw3;
} esw;
__u8 ecw[32];
} __attribute__ ((packed,aligned(4)));
/**
* struct ciw - command information word (CIW) layout
* @et: entry type
* @reserved: reserved bits
* @ct: command type
* @cmd: command code
* @count: command count
*/
struct ciw {
__u32 et : 2;
__u32 reserved : 2;
__u32 ct : 4;
__u32 cmd : 8;
__u32 count : 16;
} __attribute__ ((packed));
#define CIW_TYPE_RCD 0x0 /* read configuration data */
#define CIW_TYPE_SII 0x1 /* set interface identifier */
#define CIW_TYPE_RNI 0x2 /* read node identifier */
/*
* Flags used as input parameters for do_IO()
*/
#define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */
#define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */
#define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */
/* ... for suspended CCWs */
/* Device or subchannel gone. */
#define CIO_GONE 0x0001
/* No path to device. */
#define CIO_NO_PATH 0x0002
/* Device has appeared. */
#define CIO_OPER 0x0004
/* Sick revalidation of device. */
#define CIO_REVALIDATE 0x0008
/* Device did not respond in time. */
#define CIO_BOXED 0x0010
/**
* struct ccw_dev_id - unique identifier for ccw devices
* @ssid: subchannel set id
* @devno: device number
*
* This structure is not directly based on any hardware structure. The
* hardware identifies a device by its device number and its subchannel,
* which is in turn identified by its id. In order to get a unique identifier
* for ccw devices across subchannel sets, @struct ccw_dev_id has been
* introduced.
*/
struct ccw_dev_id {
u8 ssid;
u16 devno;
};
/**
* ccw_device_id_is_equal() - compare two ccw_dev_ids
* @dev_id1: a ccw_dev_id
* @dev_id2: another ccw_dev_id
* Returns:
* %1 if the two structures are equal field-by-field,
* %0 if not.
* Context:
* any
*/
static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
struct ccw_dev_id *dev_id2)
{
if ((dev_id1->ssid == dev_id2->ssid) &&
(dev_id1->devno == dev_id2->devno))
return 1;
return 0;
}
extern void wait_cons_dev(void);
extern void css_schedule_reprobe(void);
extern void reipl_ccw_dev(struct ccw_dev_id *id);
struct cio_iplinfo {
u16 devno;
int is_qdio;
};
extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo);
/* Function from drivers/s390/cio/chsc.c */
int chsc_sstpc(void *page, unsigned int op, u16 ctrl);
int chsc_sstpi(void *page, void *result, size_t size);
#endif
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