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-rw-r--r--arch/s390/include/asm/cio.h514
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diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h
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1/*
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#define __MAX_CSSID 0
17
18/**
19 * struct cmd_scsw - command-mode subchannel status word
20 * @key: subchannel key
21 * @sctl: suspend control
22 * @eswf: esw format
23 * @cc: deferred condition code
24 * @fmt: format
25 * @pfch: prefetch
26 * @isic: initial-status interruption control
27 * @alcc: address-limit checking control
28 * @ssi: suppress-suspended interruption
29 * @zcc: zero condition code
30 * @ectl: extended control
31 * @pno: path not operational
32 * @res: reserved
33 * @fctl: function control
34 * @actl: activity control
35 * @stctl: status control
36 * @cpa: channel program address
37 * @dstat: device status
38 * @cstat: subchannel status
39 * @count: residual count
40 */
41struct cmd_scsw {
42 __u32 key : 4;
43 __u32 sctl : 1;
44 __u32 eswf : 1;
45 __u32 cc : 2;
46 __u32 fmt : 1;
47 __u32 pfch : 1;
48 __u32 isic : 1;
49 __u32 alcc : 1;
50 __u32 ssi : 1;
51 __u32 zcc : 1;
52 __u32 ectl : 1;
53 __u32 pno : 1;
54 __u32 res : 1;
55 __u32 fctl : 3;
56 __u32 actl : 7;
57 __u32 stctl : 5;
58 __u32 cpa;
59 __u32 dstat : 8;
60 __u32 cstat : 8;
61 __u32 count : 16;
62} __attribute__ ((packed));
63
64/**
65 * struct tm_scsw - transport-mode subchannel status word
66 * @key: subchannel key
67 * @eswf: esw format
68 * @cc: deferred condition code
69 * @fmt: format
70 * @x: IRB-format control
71 * @q: interrogate-complete
72 * @ectl: extended control
73 * @pno: path not operational
74 * @fctl: function control
75 * @actl: activity control
76 * @stctl: status control
77 * @tcw: TCW address
78 * @dstat: device status
79 * @cstat: subchannel status
80 * @fcxs: FCX status
81 * @schxs: subchannel-extended status
82 */
83struct tm_scsw {
84 u32 key:4;
85 u32 :1;
86 u32 eswf:1;
87 u32 cc:2;
88 u32 fmt:3;
89 u32 x:1;
90 u32 q:1;
91 u32 :1;
92 u32 ectl:1;
93 u32 pno:1;
94 u32 :1;
95 u32 fctl:3;
96 u32 actl:7;
97 u32 stctl:5;
98 u32 tcw;
99 u32 dstat:8;
100 u32 cstat:8;
101 u32 fcxs:8;
102 u32 schxs:8;
103} __attribute__ ((packed));
104
105/**
106 * union scsw - subchannel status word
107 * @cmd: command-mode SCSW
108 * @tm: transport-mode SCSW
109 */
110union scsw {
111 struct cmd_scsw cmd;
112 struct tm_scsw tm;
113} __attribute__ ((packed));
114
115int scsw_is_tm(union scsw *scsw);
116u32 scsw_key(union scsw *scsw);
117u32 scsw_eswf(union scsw *scsw);
118u32 scsw_cc(union scsw *scsw);
119u32 scsw_ectl(union scsw *scsw);
120u32 scsw_pno(union scsw *scsw);
121u32 scsw_fctl(union scsw *scsw);
122u32 scsw_actl(union scsw *scsw);
123u32 scsw_stctl(union scsw *scsw);
124u32 scsw_dstat(union scsw *scsw);
125u32 scsw_cstat(union scsw *scsw);
126int scsw_is_solicited(union scsw *scsw);
127int scsw_is_valid_key(union scsw *scsw);
128int scsw_is_valid_eswf(union scsw *scsw);
129int scsw_is_valid_cc(union scsw *scsw);
130int scsw_is_valid_ectl(union scsw *scsw);
131int scsw_is_valid_pno(union scsw *scsw);
132int scsw_is_valid_fctl(union scsw *scsw);
133int scsw_is_valid_actl(union scsw *scsw);
134int scsw_is_valid_stctl(union scsw *scsw);
135int scsw_is_valid_dstat(union scsw *scsw);
136int scsw_is_valid_cstat(union scsw *scsw);
137int scsw_cmd_is_valid_key(union scsw *scsw);
138int scsw_cmd_is_valid_sctl(union scsw *scsw);
139int scsw_cmd_is_valid_eswf(union scsw *scsw);
140int scsw_cmd_is_valid_cc(union scsw *scsw);
141int scsw_cmd_is_valid_fmt(union scsw *scsw);
142int scsw_cmd_is_valid_pfch(union scsw *scsw);
143int scsw_cmd_is_valid_isic(union scsw *scsw);
144int scsw_cmd_is_valid_alcc(union scsw *scsw);
145int scsw_cmd_is_valid_ssi(union scsw *scsw);
146int scsw_cmd_is_valid_zcc(union scsw *scsw);
147int scsw_cmd_is_valid_ectl(union scsw *scsw);
148int scsw_cmd_is_valid_pno(union scsw *scsw);
149int scsw_cmd_is_valid_fctl(union scsw *scsw);
150int scsw_cmd_is_valid_actl(union scsw *scsw);
151int scsw_cmd_is_valid_stctl(union scsw *scsw);
152int scsw_cmd_is_valid_dstat(union scsw *scsw);
153int scsw_cmd_is_valid_cstat(union scsw *scsw);
154int scsw_cmd_is_solicited(union scsw *scsw);
155int scsw_tm_is_valid_key(union scsw *scsw);
156int scsw_tm_is_valid_eswf(union scsw *scsw);
157int scsw_tm_is_valid_cc(union scsw *scsw);
158int scsw_tm_is_valid_fmt(union scsw *scsw);
159int scsw_tm_is_valid_x(union scsw *scsw);
160int scsw_tm_is_valid_q(union scsw *scsw);
161int scsw_tm_is_valid_ectl(union scsw *scsw);
162int scsw_tm_is_valid_pno(union scsw *scsw);
163int scsw_tm_is_valid_fctl(union scsw *scsw);
164int scsw_tm_is_valid_actl(union scsw *scsw);
165int scsw_tm_is_valid_stctl(union scsw *scsw);
166int scsw_tm_is_valid_dstat(union scsw *scsw);
167int scsw_tm_is_valid_cstat(union scsw *scsw);
168int scsw_tm_is_valid_fcxs(union scsw *scsw);
169int scsw_tm_is_valid_schxs(union scsw *scsw);
170int scsw_tm_is_solicited(union scsw *scsw);
171
172#define SCSW_FCTL_CLEAR_FUNC 0x1
173#define SCSW_FCTL_HALT_FUNC 0x2
174#define SCSW_FCTL_START_FUNC 0x4
175
176#define SCSW_ACTL_SUSPENDED 0x1
177#define SCSW_ACTL_DEVACT 0x2
178#define SCSW_ACTL_SCHACT 0x4
179#define SCSW_ACTL_CLEAR_PEND 0x8
180#define SCSW_ACTL_HALT_PEND 0x10
181#define SCSW_ACTL_START_PEND 0x20
182#define SCSW_ACTL_RESUME_PEND 0x40
183
184#define SCSW_STCTL_STATUS_PEND 0x1
185#define SCSW_STCTL_SEC_STATUS 0x2
186#define SCSW_STCTL_PRIM_STATUS 0x4
187#define SCSW_STCTL_INTER_STATUS 0x8
188#define SCSW_STCTL_ALERT_STATUS 0x10
189
190#define DEV_STAT_ATTENTION 0x80
191#define DEV_STAT_STAT_MOD 0x40
192#define DEV_STAT_CU_END 0x20
193#define DEV_STAT_BUSY 0x10
194#define DEV_STAT_CHN_END 0x08
195#define DEV_STAT_DEV_END 0x04
196#define DEV_STAT_UNIT_CHECK 0x02
197#define DEV_STAT_UNIT_EXCEP 0x01
198
199#define SCHN_STAT_PCI 0x80
200#define SCHN_STAT_INCORR_LEN 0x40
201#define SCHN_STAT_PROG_CHECK 0x20
202#define SCHN_STAT_PROT_CHECK 0x10
203#define SCHN_STAT_CHN_DATA_CHK 0x08
204#define SCHN_STAT_CHN_CTRL_CHK 0x04
205#define SCHN_STAT_INTF_CTRL_CHK 0x02
206#define SCHN_STAT_CHAIN_CHECK 0x01
207
208/*
209 * architectured values for first sense byte
210 */
211#define SNS0_CMD_REJECT 0x80
212#define SNS_CMD_REJECT SNS0_CMD_REJEC
213#define SNS0_INTERVENTION_REQ 0x40
214#define SNS0_BUS_OUT_CHECK 0x20
215#define SNS0_EQUIPMENT_CHECK 0x10
216#define SNS0_DATA_CHECK 0x08
217#define SNS0_OVERRUN 0x04
218#define SNS0_INCOMPL_DOMAIN 0x01
219
220/*
221 * architectured values for second sense byte
222 */
223#define SNS1_PERM_ERR 0x80
224#define SNS1_INV_TRACK_FORMAT 0x40
225#define SNS1_EOC 0x20
226#define SNS1_MESSAGE_TO_OPER 0x10
227#define SNS1_NO_REC_FOUND 0x08
228#define SNS1_FILE_PROTECTED 0x04
229#define SNS1_WRITE_INHIBITED 0x02
230#define SNS1_INPRECISE_END 0x01
231
232/*
233 * architectured values for third sense byte
234 */
235#define SNS2_REQ_INH_WRITE 0x80
236#define SNS2_CORRECTABLE 0x40
237#define SNS2_FIRST_LOG_ERR 0x20
238#define SNS2_ENV_DATA_PRESENT 0x10
239#define SNS2_INPRECISE_END 0x04
240
241/**
242 * struct ccw1 - channel command word
243 * @cmd_code: command code
244 * @flags: flags, like IDA adressing, etc.
245 * @count: byte count
246 * @cda: data address
247 *
248 * The ccw is the basic structure to build channel programs that perform
249 * operations with the device or the control unit. Only Format-1 channel
250 * command words are supported.
251 */
252struct ccw1 {
253 __u8 cmd_code;
254 __u8 flags;
255 __u16 count;
256 __u32 cda;
257} __attribute__ ((packed,aligned(8)));
258
259#define CCW_FLAG_DC 0x80
260#define CCW_FLAG_CC 0x40
261#define CCW_FLAG_SLI 0x20
262#define CCW_FLAG_SKIP 0x10
263#define CCW_FLAG_PCI 0x08
264#define CCW_FLAG_IDA 0x04
265#define CCW_FLAG_SUSPEND 0x02
266
267#define CCW_CMD_READ_IPL 0x02
268#define CCW_CMD_NOOP 0x03
269#define CCW_CMD_BASIC_SENSE 0x04
270#define CCW_CMD_TIC 0x08
271#define CCW_CMD_STLCK 0x14
272#define CCW_CMD_SENSE_PGID 0x34
273#define CCW_CMD_SUSPEND_RECONN 0x5B
274#define CCW_CMD_RDC 0x64
275#define CCW_CMD_RELEASE 0x94
276#define CCW_CMD_SET_PGID 0xAF
277#define CCW_CMD_SENSE_ID 0xE4
278#define CCW_CMD_DCTL 0xF3
279
280#define SENSE_MAX_COUNT 0x20
281
282/**
283 * struct erw - extended report word
284 * @res0: reserved
285 * @auth: authorization check
286 * @pvrf: path-verification-required flag
287 * @cpt: channel-path timeout
288 * @fsavf: failing storage address validity flag
289 * @cons: concurrent sense
290 * @scavf: secondary ccw address validity flag
291 * @fsaf: failing storage address format
292 * @scnt: sense count, if @cons == %1
293 * @res16: reserved
294 */
295struct erw {
296 __u32 res0 : 3;
297 __u32 auth : 1;
298 __u32 pvrf : 1;
299 __u32 cpt : 1;
300 __u32 fsavf : 1;
301 __u32 cons : 1;
302 __u32 scavf : 1;
303 __u32 fsaf : 1;
304 __u32 scnt : 6;
305 __u32 res16 : 16;
306} __attribute__ ((packed));
307
308/**
309 * struct sublog - subchannel logout area
310 * @res0: reserved
311 * @esf: extended status flags
312 * @lpum: last path used mask
313 * @arep: ancillary report
314 * @fvf: field-validity flags
315 * @sacc: storage access code
316 * @termc: termination code
317 * @devsc: device-status check
318 * @serr: secondary error
319 * @ioerr: i/o-error alert
320 * @seqc: sequence code
321 */
322struct sublog {
323 __u32 res0 : 1;
324 __u32 esf : 7;
325 __u32 lpum : 8;
326 __u32 arep : 1;
327 __u32 fvf : 5;
328 __u32 sacc : 2;
329 __u32 termc : 2;
330 __u32 devsc : 1;
331 __u32 serr : 1;
332 __u32 ioerr : 1;
333 __u32 seqc : 3;
334} __attribute__ ((packed));
335
336/**
337 * struct esw0 - Format 0 Extended Status Word (ESW)
338 * @sublog: subchannel logout
339 * @erw: extended report word
340 * @faddr: failing storage address
341 * @saddr: secondary ccw address
342 */
343struct esw0 {
344 struct sublog sublog;
345 struct erw erw;
346 __u32 faddr[2];
347 __u32 saddr;
348} __attribute__ ((packed));
349
350/**
351 * struct esw1 - Format 1 Extended Status Word (ESW)
352 * @zero0: reserved zeros
353 * @lpum: last path used mask
354 * @zero16: reserved zeros
355 * @erw: extended report word
356 * @zeros: three fullwords of zeros
357 */
358struct esw1 {
359 __u8 zero0;
360 __u8 lpum;
361 __u16 zero16;
362 struct erw erw;
363 __u32 zeros[3];
364} __attribute__ ((packed));
365
366/**
367 * struct esw2 - Format 2 Extended Status Word (ESW)
368 * @zero0: reserved zeros
369 * @lpum: last path used mask
370 * @dcti: device-connect-time interval
371 * @erw: extended report word
372 * @zeros: three fullwords of zeros
373 */
374struct esw2 {
375 __u8 zero0;
376 __u8 lpum;
377 __u16 dcti;
378 struct erw erw;
379 __u32 zeros[3];
380} __attribute__ ((packed));
381
382/**
383 * struct esw3 - Format 3 Extended Status Word (ESW)
384 * @zero0: reserved zeros
385 * @lpum: last path used mask
386 * @res: reserved
387 * @erw: extended report word
388 * @zeros: three fullwords of zeros
389 */
390struct esw3 {
391 __u8 zero0;
392 __u8 lpum;
393 __u16 res;
394 struct erw erw;
395 __u32 zeros[3];
396} __attribute__ ((packed));
397
398/**
399 * struct irb - interruption response block
400 * @scsw: subchannel status word
401 * @esw: extened status word, 4 formats
402 * @ecw: extended control word
403 *
404 * The irb that is handed to the device driver when an interrupt occurs. For
405 * solicited interrupts, the common I/O layer already performs checks whether
406 * a field is valid; a field not being valid is always passed as %0.
407 * If a unit check occured, @ecw may contain sense data; this is retrieved
408 * by the common I/O layer itself if the device doesn't support concurrent
409 * sense (so that the device driver never needs to perform basic sene itself).
410 * For unsolicited interrupts, the irb is passed as-is (expect for sense data,
411 * if applicable).
412 */
413struct irb {
414 union scsw scsw;
415 union {
416 struct esw0 esw0;
417 struct esw1 esw1;
418 struct esw2 esw2;
419 struct esw3 esw3;
420 } esw;
421 __u8 ecw[32];
422} __attribute__ ((packed,aligned(4)));
423
424/**
425 * struct ciw - command information word (CIW) layout
426 * @et: entry type
427 * @reserved: reserved bits
428 * @ct: command type
429 * @cmd: command code
430 * @count: command count
431 */
432struct ciw {
433 __u32 et : 2;
434 __u32 reserved : 2;
435 __u32 ct : 4;
436 __u32 cmd : 8;
437 __u32 count : 16;
438} __attribute__ ((packed));
439
440#define CIW_TYPE_RCD 0x0 /* read configuration data */
441#define CIW_TYPE_SII 0x1 /* set interface identifier */
442#define CIW_TYPE_RNI 0x2 /* read node identifier */
443
444/*
445 * Flags used as input parameters for do_IO()
446 */
447#define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */
448#define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */
449#define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */
450 /* ... for suspended CCWs */
451/* Device or subchannel gone. */
452#define CIO_GONE 0x0001
453/* No path to device. */
454#define CIO_NO_PATH 0x0002
455/* Device has appeared. */
456#define CIO_OPER 0x0004
457/* Sick revalidation of device. */
458#define CIO_REVALIDATE 0x0008
459
460/**
461 * struct ccw_dev_id - unique identifier for ccw devices
462 * @ssid: subchannel set id
463 * @devno: device number
464 *
465 * This structure is not directly based on any hardware structure. The
466 * hardware identifies a device by its device number and its subchannel,
467 * which is in turn identified by its id. In order to get a unique identifier
468 * for ccw devices across subchannel sets, @struct ccw_dev_id has been
469 * introduced.
470 */
471struct ccw_dev_id {
472 u8 ssid;
473 u16 devno;
474};
475
476/**
477 * ccw_device_id_is_equal() - compare two ccw_dev_ids
478 * @dev_id1: a ccw_dev_id
479 * @dev_id2: another ccw_dev_id
480 * Returns:
481 * %1 if the two structures are equal field-by-field,
482 * %0 if not.
483 * Context:
484 * any
485 */
486static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
487 struct ccw_dev_id *dev_id2)
488{
489 if ((dev_id1->ssid == dev_id2->ssid) &&
490 (dev_id1->devno == dev_id2->devno))
491 return 1;
492 return 0;
493}
494
495extern void wait_cons_dev(void);
496
497extern void css_schedule_reprobe(void);
498
499extern void reipl_ccw_dev(struct ccw_dev_id *id);
500
501struct cio_iplinfo {
502 u16 devno;
503 int is_qdio;
504};
505
506extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo);
507
508/* Function from drivers/s390/cio/chsc.c */
509int chsc_sstpc(void *page, unsigned int op, u16 ctrl);
510int chsc_sstpi(void *page, void *result, size_t size);
511
512#endif
513
514#endif
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