cio.h

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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
#define __MAX_SUBCHANNEL 65535
#define __MAX_SSID 3

#include <asm/scsw.h>

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 {
    __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 erw_eadm {
    __u32 : 16;
    __u32 b : 1;
    __u32 r : 1;
    __u32  : 14;
} __packed;

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 {
    struct sublog sublog;
    struct erw erw;
    __u32  faddr[2];
    __u32  saddr;
} __attribute__ ((packed));

struct esw1 {
    __u8  zero0;
    __u8  lpum;
    __u16 zero16;
    struct erw erw;
    __u32 zeros[3];
} __attribute__ ((packed));

struct esw2 {
    __u8  zero0;
    __u8  lpum;
    __u16 dcti;
    struct erw erw;
    __u32 zeros[3];
} __attribute__ ((packed));

struct esw3 {
    __u8  zero0;
    __u8  lpum;
    __u16 res;
    struct erw erw;
    __u32 zeros[3];
} __attribute__ ((packed));

struct esw_eadm {
    __u32 sublog;
    struct erw_eadm erw;
    __u32 : 32;
    __u32 : 32;
    __u32 : 32;
} __packed;

struct irb {
    union scsw scsw;
    union {
        struct esw0 esw0;
        struct esw1 esw1;
        struct esw2 esw2;
        struct esw3 esw3;
        struct esw_eadm eadm;
    } esw;
    __u8   ecw[32];
} __attribute__ ((packed,aligned(4)));

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 {
    u8 ssid;
    u16 devno;
};

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