arch/s390/include/asm/crw.h

   1 /*
   2  *   Data definitions for channel report processing
   3  *    Copyright IBM Corp. 2000, 2009
   4  *    Author(s): Ingo Adlung <adlung@de.ibm.com>,
   5  *               Martin Schwidefsky <schwidefsky@de.ibm.com>,
   6  *               Cornelia Huck <cornelia.huck@de.ibm.com>,
   7  *               Heiko Carstens <heiko.carstens@de.ibm.com>,
   8  */
   9
  10 #ifndef _ASM_S390_CRW_H
  11 #define _ASM_S390_CRW_H
  12
  13 #include <linux/types.h>
  14
  15 /*
  16  * Channel Report Word
  17  */
  18 struct crw {
  19         __u32 res1 :  1;   /* reserved zero */
  20         __u32 slct :  1;   /* solicited */
  21         __u32 oflw :  1;   /* overflow */
  22         __u32 chn  :  1;   /* chained */
  23         __u32 rsc  :  4;   /* reporting source code */
  24         __u32 anc  :  1;   /* ancillary report */
  25         __u32 res2 :  1;   /* reserved zero */
  26         __u32 erc  :  6;   /* error-recovery code */
  27         __u32 rsid : 16;   /* reporting-source ID */
  28 } __attribute__ ((packed));
  29
  30 typedef void (*crw_handler_t)(struct crw *, struct crw *, int);
  31
  32 extern int crw_register_handler(int rsc, crw_handler_t handler);
  33 extern void crw_unregister_handler(int rsc);
  34 extern void crw_handle_channel_report(void);
  35 void crw_wait_for_channel_report(void);
  36
  37 #define NR_RSCS 16
  38
  39 #define CRW_RSC_MONITOR  0x2  /* monitoring facility */
  40 #define CRW_RSC_SCH      0x3  /* subchannel */
  41 #define CRW_RSC_CPATH    0x4  /* channel path */
  42 #define CRW_RSC_CONFIG   0x9  /* configuration-alert facility */
  43 #define CRW_RSC_CSS      0xB  /* channel subsystem */
  44
  45 #define CRW_ERC_EVENT    0x00 /* event information pending */
  46 #define CRW_ERC_AVAIL    0x01 /* available */
  47 #define CRW_ERC_INIT     0x02 /* initialized */
  48 #define CRW_ERC_TERROR   0x03 /* temporary error */
  49 #define CRW_ERC_IPARM    0x04 /* installed parm initialized */
  50 #define CRW_ERC_TERM     0x05 /* terminal */
  51 #define CRW_ERC_PERRN    0x06 /* perm. error, fac. not init */
  52 #define CRW_ERC_PERRI    0x07 /* perm. error, facility init */
  53 #define CRW_ERC_PMOD     0x08 /* installed parameters modified */
  54
  55 static inline int stcrw(struct crw *pcrw)
  56 {
  57         int ccode;
  58
  59         asm volatile(
  60                 "       stcrw   0(%2)\n"
  61                 "       ipm     %0\n"
  62                 "       srl     %0,28\n"
  63                 : "=d" (ccode), "=m" (*pcrw)
  64                 : "a" (pcrw)
  65                 : "cc" );
  66         return ccode;
  67 }
  68
  69 #endif /* _ASM_S390_CRW_H */