crw.h

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/*
 *   Data definitions for channel report processing
 *    Copyright IBM Corp. 2000, 2009
 *    Author(s): Ingo Adlung <[email protected]>,
 *       Martin Schwidefsky <[email protected]>,
 *       Cornelia Huck <[email protected]>,
 *       Heiko Carstens <[email protected]>,
 */

#ifndef _ASM_S390_CRW_H
#define _ASM_S390_CRW_H

#include <linux/types.h>

/*
 * Channel Report Word
 */
struct crw {
    __u32 res1 :  1;   /* reserved zero */
    __u32 slct :  1;   /* solicited */
    __u32 oflw :  1;   /* overflow */
    __u32 chn  :  1;   /* chained */
    __u32 rsc  :  4;   /* reporting source code */
    __u32 anc  :  1;   /* ancillary report */
    __u32 res2 :  1;   /* reserved zero */
    __u32 erc  :  6;   /* error-recovery code */
    __u32 rsid : 16;   /* reporting-source ID */
} __attribute__ ((packed));

typedef void (*crw_handler_t)(struct crw *, struct crw *, int);

extern int crw_register_handler(int rsc, crw_handler_t handler);
extern void crw_unregister_handler(int rsc);
extern void crw_handle_channel_report(void);
void crw_wait_for_channel_report(void);

#define NR_RSCS 16

#define CRW_RSC_MONITOR  0x2  /* monitoring facility */
#define CRW_RSC_SCH  0x3  /* subchannel */
#define CRW_RSC_CPATH    0x4  /* channel path */
#define CRW_RSC_CONFIG   0x9  /* configuration-alert facility */
#define CRW_RSC_CSS  0xB  /* channel subsystem */

#define CRW_ERC_EVENT    0x00 /* event information pending */
#define CRW_ERC_AVAIL    0x01 /* available */
#define CRW_ERC_INIT     0x02 /* initialized */
#define CRW_ERC_TERROR   0x03 /* temporary error */
#define CRW_ERC_IPARM    0x04 /* installed parm initialized */
#define CRW_ERC_TERM     0x05 /* terminal */
#define CRW_ERC_PERRN    0x06 /* perm. error, fac. not init */
#define CRW_ERC_PERRI    0x07 /* perm. error, facility init */
#define CRW_ERC_PMOD     0x08 /* installed parameters modified */

static inline int stcrw(struct crw *pcrw)
{
    int ccode;

    asm volatile(
        "   stcrw   0(%2)\n"
        "   ipm %0\n"
        "   srl %0,28\n"
        : "=d" (ccode), "=m" (*pcrw)
        : "a" (pcrw)
        : "cc" );
    return ccode;
}

#endif /* _ASM_S390_CRW_H */