2 * include/asm-s390/cio.h
3 * include/asm-s390x/cio.h
5 * Common interface for I/O on S/390
7 #ifndef _ASM_S390_CIO_H_
8 #define _ASM_S390_CIO_H_
10 #include <linux/spinlock.h>
11 #include <asm/types.h>
15 #define LPM_ANYPATH 0xff
19 * subchannel status word
22 __u32 key : 4; /* subchannel key */
23 __u32 sctl : 1; /* suspend control */
24 __u32 eswf : 1; /* ESW format */
25 __u32 cc : 2; /* deferred condition code */
26 __u32 fmt : 1; /* format */
27 __u32 pfch : 1; /* prefetch */
28 __u32 isic : 1; /* initial-status interruption control */
29 __u32 alcc : 1; /* address-limit checking control */
30 __u32 ssi : 1; /* supress-suspended interruption */
31 __u32 zcc : 1; /* zero condition code */
32 __u32 ectl : 1; /* extended control */
33 __u32 pno : 1; /* path not operational */
34 __u32 res : 1; /* reserved */
35 __u32 fctl : 3; /* function control */
36 __u32 actl : 7; /* activity control */
37 __u32 stctl : 5; /* status control */
38 __u32 cpa; /* channel program address */
39 __u32 dstat : 8; /* device status */
40 __u32 cstat : 8; /* subchannel status */
41 __u32 count : 16; /* residual count */
42 } __attribute__ ((packed));
44 #define SCSW_FCTL_CLEAR_FUNC 0x1
45 #define SCSW_FCTL_HALT_FUNC 0x2
46 #define SCSW_FCTL_START_FUNC 0x4
48 #define SCSW_ACTL_SUSPENDED 0x1
49 #define SCSW_ACTL_DEVACT 0x2
50 #define SCSW_ACTL_SCHACT 0x4
51 #define SCSW_ACTL_CLEAR_PEND 0x8
52 #define SCSW_ACTL_HALT_PEND 0x10
53 #define SCSW_ACTL_START_PEND 0x20
54 #define SCSW_ACTL_RESUME_PEND 0x40
56 #define SCSW_STCTL_STATUS_PEND 0x1
57 #define SCSW_STCTL_SEC_STATUS 0x2
58 #define SCSW_STCTL_PRIM_STATUS 0x4
59 #define SCSW_STCTL_INTER_STATUS 0x8
60 #define SCSW_STCTL_ALERT_STATUS 0x10
62 #define DEV_STAT_ATTENTION 0x80
63 #define DEV_STAT_STAT_MOD 0x40
64 #define DEV_STAT_CU_END 0x20
65 #define DEV_STAT_BUSY 0x10
66 #define DEV_STAT_CHN_END 0x08
67 #define DEV_STAT_DEV_END 0x04
68 #define DEV_STAT_UNIT_CHECK 0x02
69 #define DEV_STAT_UNIT_EXCEP 0x01
71 #define SCHN_STAT_PCI 0x80
72 #define SCHN_STAT_INCORR_LEN 0x40
73 #define SCHN_STAT_PROG_CHECK 0x20
74 #define SCHN_STAT_PROT_CHECK 0x10
75 #define SCHN_STAT_CHN_DATA_CHK 0x08
76 #define SCHN_STAT_CHN_CTRL_CHK 0x04
77 #define SCHN_STAT_INTF_CTRL_CHK 0x02
78 #define SCHN_STAT_CHAIN_CHECK 0x01
81 * architectured values for first sense byte
83 #define SNS0_CMD_REJECT 0x80
84 #define SNS_CMD_REJECT SNS0_CMD_REJEC
85 #define SNS0_INTERVENTION_REQ 0x40
86 #define SNS0_BUS_OUT_CHECK 0x20
87 #define SNS0_EQUIPMENT_CHECK 0x10
88 #define SNS0_DATA_CHECK 0x08
89 #define SNS0_OVERRUN 0x04
90 #define SNS0_INCOMPL_DOMAIN 0x01
93 * architectured values for second sense byte
95 #define SNS1_PERM_ERR 0x80
96 #define SNS1_INV_TRACK_FORMAT 0x40
98 #define SNS1_MESSAGE_TO_OPER 0x10
99 #define SNS1_NO_REC_FOUND 0x08
100 #define SNS1_FILE_PROTECTED 0x04
101 #define SNS1_WRITE_INHIBITED 0x02
102 #define SNS1_INPRECISE_END 0x01
105 * architectured values for third sense byte
107 #define SNS2_REQ_INH_WRITE 0x80
108 #define SNS2_CORRECTABLE 0x40
109 #define SNS2_FIRST_LOG_ERR 0x20
110 #define SNS2_ENV_DATA_PRESENT 0x10
111 #define SNS2_INPRECISE_END 0x04
114 __u8 cmd_code; /* command code */
115 __u8 flags; /* flags, like IDA addressing, etc. */
116 __u16 count; /* byte count */
117 __u32 cda; /* data address */
118 } __attribute__ ((packed,aligned(8)));
120 #define CCW_FLAG_DC 0x80
121 #define CCW_FLAG_CC 0x40
122 #define CCW_FLAG_SLI 0x20
123 #define CCW_FLAG_SKIP 0x10
124 #define CCW_FLAG_PCI 0x08
125 #define CCW_FLAG_IDA 0x04
126 #define CCW_FLAG_SUSPEND 0x02
128 #define CCW_CMD_READ_IPL 0x02
129 #define CCW_CMD_NOOP 0x03
130 #define CCW_CMD_BASIC_SENSE 0x04
131 #define CCW_CMD_TIC 0x08
132 #define CCW_CMD_STLCK 0x14
133 #define CCW_CMD_SENSE_PGID 0x34
134 #define CCW_CMD_SUSPEND_RECONN 0x5B
135 #define CCW_CMD_RDC 0x64
136 #define CCW_CMD_RELEASE 0x94
137 #define CCW_CMD_SET_PGID 0xAF
138 #define CCW_CMD_SENSE_ID 0xE4
139 #define CCW_CMD_DCTL 0xF3
141 #define SENSE_MAX_COUNT 0x20
144 __u32 res0 : 3; /* reserved */
145 __u32 auth : 1; /* Authorization check */
146 __u32 pvrf : 1; /* path-verification-required flag */
147 __u32 cpt : 1; /* channel-path timeout */
148 __u32 fsavf : 1; /* Failing storage address validity flag */
149 __u32 cons : 1; /* concurrent-sense */
150 __u32 scavf : 1; /* Secondary ccw address validity flag */
151 __u32 fsaf : 1; /* Failing storage address format */
152 __u32 scnt : 6; /* sense count if cons == 1 */
153 __u32 res16 : 16; /* reserved */
154 } __attribute__ ((packed));
157 * subchannel logout area
160 __u32 res0 : 1; /* reserved */
161 __u32 esf : 7; /* extended status flags */
162 __u32 lpum : 8; /* last path used mask */
163 __u32 arep : 1; /* ancillary report */
164 __u32 fvf : 5; /* field-validity flags */
165 __u32 sacc : 2; /* storage access code */
166 __u32 termc : 2; /* termination code */
167 __u32 devsc : 1; /* device-status check */
168 __u32 serr : 1; /* secondary error */
169 __u32 ioerr : 1; /* i/o-error alert */
170 __u32 seqc : 3; /* sequence code */
171 } __attribute__ ((packed));
174 * Format 0 Extended Status Word (ESW)
177 struct sublog sublog; /* subchannel logout */
178 struct erw erw; /* extended report word */
179 __u32 faddr[2]; /* failing storage address */
180 __u32 saddr; /* secondary ccw address */
181 } __attribute__ ((packed));
184 * Format 1 Extended Status Word (ESW)
187 __u8 zero0; /* reserved zeros */
188 __u8 lpum; /* last path used mask */
189 __u16 zero16; /* reserved zeros */
190 struct erw erw; /* extended report word */
191 __u32 zeros[3]; /* 2 fullwords of zeros */
192 } __attribute__ ((packed));
195 * Format 2 Extended Status Word (ESW)
198 __u8 zero0; /* reserved zeros */
199 __u8 lpum; /* last path used mask */
200 __u16 dcti; /* device-connect-time interval */
201 struct erw erw; /* extended report word */
202 __u32 zeros[3]; /* 2 fullwords of zeros */
203 } __attribute__ ((packed));
206 * Format 3 Extended Status Word (ESW)
209 __u8 zero0; /* reserved zeros */
210 __u8 lpum; /* last path used mask */
211 __u16 res; /* reserved */
212 struct erw erw; /* extended report word */
213 __u32 zeros[3]; /* 2 fullwords of zeros */
214 } __attribute__ ((packed));
217 * interruption response block
220 struct scsw scsw; /* subchannel status word */
221 union { /* extended status word, 4 formats */
227 __u8 ecw[32]; /* extended control word */
228 } __attribute__ ((packed,aligned(4)));
231 * command information word (CIW) layout
234 __u32 et : 2; /* entry type */
235 __u32 reserved : 2; /* reserved */
236 __u32 ct : 4; /* command type */
237 __u32 cmd : 8; /* command */
238 __u32 count : 16; /* coun */
239 } __attribute__ ((packed));
241 #define CIW_TYPE_RCD 0x0 /* read configuration data */
242 #define CIW_TYPE_SII 0x1 /* set interface identifier */
243 #define CIW_TYPE_RNI 0x2 /* read node identifier */
246 * Flags used as input parameters for do_IO()
248 #define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */
249 #define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */
250 #define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */
251 /* ... for suspended CCWs */
252 /* Device or subchannel gone. */
253 #define CIO_GONE 0x0001
254 /* No path to device. */
255 #define CIO_NO_PATH 0x0002
256 /* Device has appeared. */
257 #define CIO_OPER 0x0004
258 /* Sick revalidation of device. */
259 #define CIO_REVALIDATE 0x0008
266 static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
267 struct ccw_dev_id *dev_id2)
269 if ((dev_id1->ssid == dev_id2->ssid) &&
270 (dev_id1->devno == dev_id2->devno))
275 extern void wait_cons_dev(void);
277 extern void css_schedule_reprobe(void);
279 extern void reipl_ccw_dev(struct ccw_dev_id *id);
286 extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo);