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crw.h
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1 /*
2  * Data definitions for channel report processing
3  * Copyright IBM Corp. 2000, 2009
4  * Author(s): Ingo Adlung <[email protected]>,
5  * Martin Schwidefsky <[email protected]>,
6  * Cornelia Huck <[email protected]>,
7  * Heiko Carstens <[email protected]>,
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);
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 */