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/
usr/
src/
linux-headers-3.0.0-14/
arch/
s390/
include/
asm/
- drwxr-xr-x
|
Viewing file:  cio.h (6.99 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* include/asm-s390/cio.h
* include/asm-s390x/cio.h
*
* 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>
#ifdef __KERNEL__
#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
#endif
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