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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * include/asm-s390/cio.h
3 * include/asm-s390x/cio.h
4 *
5 * Common interface for I/O on S/390
6 */
7#ifndef _ASM_S390_CIO_H_
8#define _ASM_S390_CIO_H_
9
10#include <linux/spinlock.h>
11#include <asm/types.h>
12
13#ifdef __KERNEL__
14
15#define LPM_ANYPATH 0xff
16
17/*
18 * subchannel status word
19 */
20struct scsw {
21 __u32 key : 4; /* subchannel key */
22 __u32 sctl : 1; /* suspend control */
23 __u32 eswf : 1; /* ESW format */
24 __u32 cc : 2; /* deferred condition code */
25 __u32 fmt : 1; /* format */
26 __u32 pfch : 1; /* prefetch */
27 __u32 isic : 1; /* initial-status interruption control */
28 __u32 alcc : 1; /* address-limit checking control */
29 __u32 ssi : 1; /* supress-suspended interruption */
30 __u32 zcc : 1; /* zero condition code */
31 __u32 ectl : 1; /* extended control */
32 __u32 pno : 1; /* path not operational */
33 __u32 res : 1; /* reserved */
34 __u32 fctl : 3; /* function control */
35 __u32 actl : 7; /* activity control */
36 __u32 stctl : 5; /* status control */
37 __u32 cpa; /* channel program address */
38 __u32 dstat : 8; /* device status */
39 __u32 cstat : 8; /* subchannel status */
40 __u32 count : 16; /* residual count */
41} __attribute__ ((packed));
42
43#define SCSW_FCTL_CLEAR_FUNC 0x1
44#define SCSW_FCTL_HALT_FUNC 0x2
45#define SCSW_FCTL_START_FUNC 0x4
46
47#define SCSW_ACTL_SUSPENDED 0x1
48#define SCSW_ACTL_DEVACT 0x2
49#define SCSW_ACTL_SCHACT 0x4
50#define SCSW_ACTL_CLEAR_PEND 0x8
51#define SCSW_ACTL_HALT_PEND 0x10
52#define SCSW_ACTL_START_PEND 0x20
53#define SCSW_ACTL_RESUME_PEND 0x40
54
55#define SCSW_STCTL_STATUS_PEND 0x1
56#define SCSW_STCTL_SEC_STATUS 0x2
57#define SCSW_STCTL_PRIM_STATUS 0x4
58#define SCSW_STCTL_INTER_STATUS 0x8
59#define SCSW_STCTL_ALERT_STATUS 0x10
60
61#define DEV_STAT_ATTENTION 0x80
62#define DEV_STAT_STAT_MOD 0x40
63#define DEV_STAT_CU_END 0x20
64#define DEV_STAT_BUSY 0x10
65#define DEV_STAT_CHN_END 0x08
66#define DEV_STAT_DEV_END 0x04
67#define DEV_STAT_UNIT_CHECK 0x02
68#define DEV_STAT_UNIT_EXCEP 0x01
69
70#define SCHN_STAT_PCI 0x80
71#define SCHN_STAT_INCORR_LEN 0x40
72#define SCHN_STAT_PROG_CHECK 0x20
73#define SCHN_STAT_PROT_CHECK 0x10
74#define SCHN_STAT_CHN_DATA_CHK 0x08
75#define SCHN_STAT_CHN_CTRL_CHK 0x04
76#define SCHN_STAT_INTF_CTRL_CHK 0x02
77#define SCHN_STAT_CHAIN_CHECK 0x01
78
79/*
80 * architectured values for first sense byte
81 */
82#define SNS0_CMD_REJECT 0x80
83#define SNS_CMD_REJECT SNS0_CMD_REJEC
84#define SNS0_INTERVENTION_REQ 0x40
85#define SNS0_BUS_OUT_CHECK 0x20
86#define SNS0_EQUIPMENT_CHECK 0x10
87#define SNS0_DATA_CHECK 0x08
88#define SNS0_OVERRUN 0x04
89#define SNS0_INCOMPL_DOMAIN 0x01
90
91/*
92 * architectured values for second sense byte
93 */
94#define SNS1_PERM_ERR 0x80
95#define SNS1_INV_TRACK_FORMAT 0x40
96#define SNS1_EOC 0x20
97#define SNS1_MESSAGE_TO_OPER 0x10
98#define SNS1_NO_REC_FOUND 0x08
99#define SNS1_FILE_PROTECTED 0x04
100#define SNS1_WRITE_INHIBITED 0x02
101#define SNS1_INPRECISE_END 0x01
102
103/*
104 * architectured values for third sense byte
105 */
106#define SNS2_REQ_INH_WRITE 0x80
107#define SNS2_CORRECTABLE 0x40
108#define SNS2_FIRST_LOG_ERR 0x20
109#define SNS2_ENV_DATA_PRESENT 0x10
110#define SNS2_INPRECISE_END 0x04
111
112struct ccw1 {
113 __u8 cmd_code; /* command code */
114 __u8 flags; /* flags, like IDA addressing, etc. */
115 __u16 count; /* byte count */
116 __u32 cda; /* data address */
117} __attribute__ ((packed,aligned(8)));
118
119#define CCW_FLAG_DC 0x80
120#define CCW_FLAG_CC 0x40
121#define CCW_FLAG_SLI 0x20
122#define CCW_FLAG_SKIP 0x10
123#define CCW_FLAG_PCI 0x08
124#define CCW_FLAG_IDA 0x04
125#define CCW_FLAG_SUSPEND 0x02
126
127#define CCW_CMD_READ_IPL 0x02
128#define CCW_CMD_NOOP 0x03
129#define CCW_CMD_BASIC_SENSE 0x04
130#define CCW_CMD_TIC 0x08
131#define CCW_CMD_STLCK 0x14
132#define CCW_CMD_SENSE_PGID 0x34
133#define CCW_CMD_SUSPEND_RECONN 0x5B
134#define CCW_CMD_RDC 0x64
135#define CCW_CMD_RELEASE 0x94
136#define CCW_CMD_SET_PGID 0xAF
137#define CCW_CMD_SENSE_ID 0xE4
138#define CCW_CMD_DCTL 0xF3
139
140#define SENSE_MAX_COUNT 0x20
141
142struct erw {
143 __u32 res0 : 3; /* reserved */
144 __u32 auth : 1; /* Authorization check */
145 __u32 pvrf : 1; /* path-verification-required flag */
146 __u32 cpt : 1; /* channel-path timeout */
147 __u32 fsavf : 1; /* Failing storage address validity flag */
148 __u32 cons : 1; /* concurrent-sense */
149 __u32 scavf : 1; /* Secondary ccw address validity flag */
150 __u32 fsaf : 1; /* Failing storage address format */
151 __u32 scnt : 6; /* sense count if cons == 1 */
152 __u32 res16 : 16; /* reserved */
153} __attribute__ ((packed));
154
155/*
156 * subchannel logout area
157 */
158struct sublog {
159 __u32 res0 : 1; /* reserved */
160 __u32 esf : 7; /* extended status flags */
161 __u32 lpum : 8; /* last path used mask */
162 __u32 arep : 1; /* ancillary report */
163 __u32 fvf : 5; /* field-validity flags */
164 __u32 sacc : 2; /* storage access code */
165 __u32 termc : 2; /* termination code */
166 __u32 devsc : 1; /* device-status check */
167 __u32 serr : 1; /* secondary error */
168 __u32 ioerr : 1; /* i/o-error alert */
169 __u32 seqc : 3; /* sequence code */
170} __attribute__ ((packed));
171
172/*
173 * Format 0 Extended Status Word (ESW)
174 */
175struct esw0 {
176 struct sublog sublog; /* subchannel logout */
177 struct erw erw; /* extended report word */
178 __u32 faddr[2]; /* failing storage address */
179 __u32 saddr; /* secondary ccw address */
180} __attribute__ ((packed));
181
182/*
183 * Format 1 Extended Status Word (ESW)
184 */
185struct esw1 {
186 __u8 zero0; /* reserved zeros */
187 __u8 lpum; /* last path used mask */
188 __u16 zero16; /* reserved zeros */
189 struct erw erw; /* extended report word */
190 __u32 zeros[3]; /* 2 fullwords of zeros */
191} __attribute__ ((packed));
192
193/*
194 * Format 2 Extended Status Word (ESW)
195 */
196struct esw2 {
197 __u8 zero0; /* reserved zeros */
198 __u8 lpum; /* last path used mask */
199 __u16 dcti; /* device-connect-time interval */
200 struct erw erw; /* extended report word */
201 __u32 zeros[3]; /* 2 fullwords of zeros */
202} __attribute__ ((packed));
203
204/*
205 * Format 3 Extended Status Word (ESW)
206 */
207struct esw3 {
208 __u8 zero0; /* reserved zeros */
209 __u8 lpum; /* last path used mask */
210 __u16 res; /* reserved */
211 struct erw erw; /* extended report word */
212 __u32 zeros[3]; /* 2 fullwords of zeros */
213} __attribute__ ((packed));
214
215/*
216 * interruption response block
217 */
218struct irb {
219 struct scsw scsw; /* subchannel status word */
220 union { /* extended status word, 4 formats */
221 struct esw0 esw0;
222 struct esw1 esw1;
223 struct esw2 esw2;
224 struct esw3 esw3;
225 } esw;
226 __u8 ecw[32]; /* extended control word */
227} __attribute__ ((packed,aligned(4)));
228
229/*
230 * command information word (CIW) layout
231 */
232struct ciw {
233 __u32 et : 2; /* entry type */
234 __u32 reserved : 2; /* reserved */
235 __u32 ct : 4; /* command type */
236 __u32 cmd : 8; /* command */
237 __u32 count : 16; /* coun */
238} __attribute__ ((packed));
239
240#define CIW_TYPE_RCD 0x0 /* read configuration data */
241#define CIW_TYPE_SII 0x1 /* set interface identifier */
242#define CIW_TYPE_RNI 0x2 /* read node identifier */
243
244/*
245 * Flags used as input parameters for do_IO()
246 */
247#define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */
248#define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */
249#define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */
250 /* ... for suspended CCWs */
251/* Device or subchannel gone. */
252#define CIO_GONE 0x0001
253/* No path to device. */
254#define CIO_NO_PATH 0x0002
255/* Device has appeared. */
256#define CIO_OPER 0x0004
257/* Sick revalidation of device. */
258#define CIO_REVALIDATE 0x0008
259
260struct diag210 {
261 __u16 vrdcdvno : 16; /* device number (input) */
262 __u16 vrdclen : 16; /* data block length (input) */
263 __u32 vrdcvcla : 8; /* virtual device class (output) */
264 __u32 vrdcvtyp : 8; /* virtual device type (output) */
265 __u32 vrdcvsta : 8; /* virtual device status (output) */
266 __u32 vrdcvfla : 8; /* virtual device flags (output) */
267 __u32 vrdcrccl : 8; /* real device class (output) */
268 __u32 vrdccrty : 8; /* real device type (output) */
269 __u32 vrdccrmd : 8; /* real device model (output) */
270 __u32 vrdccrft : 8; /* real device feature (output) */
271} __attribute__ ((packed,aligned(4)));
272
Michael Holzheuff6b8ea2006-09-20 15:58:49 +0200273struct ccw_dev_id {
274 u8 ssid;
275 u16 devno;
276};
277
Cornelia Huck78964262006-10-11 15:31:38 +0200278static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
279 struct ccw_dev_id *dev_id2)
280{
281 return !memcmp(dev_id1, dev_id2, sizeof(struct ccw_dev_id));
282}
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284extern int diag210(struct diag210 *addr);
285
286extern void wait_cons_dev(void);
287
288extern void clear_all_subchannels(void);
289
Cornelia Huck7e560812006-07-12 16:40:19 +0200290extern void cio_reset_channel_paths(void);
291
Peter Oberparleiter40154b82006-06-29 14:57:03 +0200292extern void css_schedule_reprobe(void);
293
Michael Holzheuff6b8ea2006-09-20 15:58:49 +0200294extern void reipl_ccw_dev(struct ccw_dev_id *id);
295
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296#endif
297
298#endif