[SCSI] zfcp: Dont fail SCSI commands when transitioning to blocked fc_rport
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / scsi / zfcp_dbf.h
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1/*
2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
4 *
d46f384a 5 * Copyright IBM Corp. 2008, 2009
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6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#ifndef ZFCP_DBF_H
23#define ZFCP_DBF_H
24
dcd20e23 25#include "zfcp_ext.h"
2b604c9b 26#include "zfcp_fsf.h"
dcd20e23 27#include "zfcp_def.h"
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28
29#define ZFCP_DBF_TAG_SIZE 4
5ffd51a5 30#define ZFCP_DBF_ID_SIZE 7
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31
32struct zfcp_dbf_dump {
33 u8 tag[ZFCP_DBF_TAG_SIZE];
34 u32 total_size; /* size of total dump data */
35 u32 offset; /* how much data has being already dumped */
36 u32 size; /* how much data comes with this record */
37 u8 data[]; /* dump data */
38} __attribute__ ((packed));
39
5771710b 40struct zfcp_dbf_rec_record_thread {
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41 u32 total;
42 u32 ready;
43 u32 running;
7337891f 44};
2b604c9b 45
5771710b 46struct zfcp_dbf_rec_record_target {
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47 u64 ref;
48 u32 status;
49 u32 d_id;
50 u64 wwpn;
51 u64 fcp_lun;
52 u32 erp_count;
7337891f 53};
2b604c9b 54
5771710b 55struct zfcp_dbf_rec_record_trigger {
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56 u8 want;
57 u8 need;
58 u32 as;
59 u32 ps;
60 u32 us;
61 u64 ref;
62 u64 action;
63 u64 wwpn;
64 u64 fcp_lun;
7337891f 65};
2b604c9b 66
5771710b 67struct zfcp_dbf_rec_record_action {
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68 u32 status;
69 u32 step;
70 u64 action;
71 u64 fsf_req;
7337891f 72};
2b604c9b 73
5771710b 74struct zfcp_dbf_rec_record {
2b604c9b 75 u8 id;
5ffd51a5 76 char id2[7];
2b604c9b 77 union {
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78 struct zfcp_dbf_rec_record_action action;
79 struct zfcp_dbf_rec_record_thread thread;
80 struct zfcp_dbf_rec_record_target target;
81 struct zfcp_dbf_rec_record_trigger trigger;
2b604c9b 82 } u;
7337891f 83};
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84
85enum {
86 ZFCP_REC_DBF_ID_ACTION,
87 ZFCP_REC_DBF_ID_THREAD,
88 ZFCP_REC_DBF_ID_TARGET,
89 ZFCP_REC_DBF_ID_TRIGGER,
90};
91
5771710b 92struct zfcp_dbf_hba_record_response {
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93 u32 fsf_command;
94 u64 fsf_reqid;
95 u32 fsf_seqno;
96 u64 fsf_issued;
97 u32 fsf_prot_status;
98 u32 fsf_status;
99 u8 fsf_prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE];
100 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
101 u32 fsf_req_status;
102 u8 sbal_first;
e891bffe 103 u8 sbal_last;
c3baa9a2 104 u8 sbal_response;
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105 u8 pool;
106 u64 erp_action;
107 union {
108 struct {
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109 u64 cmnd;
110 u64 serial;
111 } fcp;
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112 struct {
113 u64 wwpn;
114 u32 d_id;
115 u32 port_handle;
116 } port;
117 struct {
118 u64 wwpn;
119 u64 fcp_lun;
120 u32 port_handle;
121 u32 lun_handle;
122 } unit;
123 struct {
124 u32 d_id;
125 u8 ls_code;
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126 } els;
127 } u;
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128} __attribute__ ((packed));
129
5771710b 130struct zfcp_dbf_hba_record_status {
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131 u8 failed;
132 u32 status_type;
133 u32 status_subtype;
134 struct fsf_queue_designator
135 queue_designator;
136 u32 payload_size;
137#define ZFCP_DBF_UNSOL_PAYLOAD 80
138#define ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL 32
139#define ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD 56
140#define ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT 2 * sizeof(u32)
141 u8 payload[ZFCP_DBF_UNSOL_PAYLOAD];
142} __attribute__ ((packed));
143
5771710b 144struct zfcp_dbf_hba_record_qdio {
2b604c9b 145 u32 qdio_error;
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146 u8 sbal_index;
147 u8 sbal_count;
148} __attribute__ ((packed));
149
5771710b 150struct zfcp_dbf_hba_record {
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151 u8 tag[ZFCP_DBF_TAG_SIZE];
152 u8 tag2[ZFCP_DBF_TAG_SIZE];
153 union {
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154 struct zfcp_dbf_hba_record_response response;
155 struct zfcp_dbf_hba_record_status status;
156 struct zfcp_dbf_hba_record_qdio qdio;
57069386 157 struct fsf_bit_error_payload berr;
6bc473dd 158 } u;
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159} __attribute__ ((packed));
160
5771710b 161struct zfcp_dbf_san_record_ct_request {
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162 u16 cmd_req_code;
163 u8 revision;
164 u8 gs_type;
165 u8 gs_subtype;
166 u8 options;
167 u16 max_res_size;
168 u32 len;
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169} __attribute__ ((packed));
170
5771710b 171struct zfcp_dbf_san_record_ct_response {
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172 u16 cmd_rsp_code;
173 u8 revision;
174 u8 reason_code;
175 u8 expl;
176 u8 vendor_unique;
39eb7e9a 177 u16 max_res_size;
6bc473dd 178 u32 len;
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179} __attribute__ ((packed));
180
5771710b 181struct zfcp_dbf_san_record_els {
2b604c9b 182 u8 ls_code;
6bc473dd 183 u32 len;
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184} __attribute__ ((packed));
185
5771710b 186struct zfcp_dbf_san_record {
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187 u8 tag[ZFCP_DBF_TAG_SIZE];
188 u64 fsf_reqid;
189 u32 fsf_seqno;
190 u32 s_id;
191 u32 d_id;
192 union {
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193 struct zfcp_dbf_san_record_ct_request ct_req;
194 struct zfcp_dbf_san_record_ct_response ct_resp;
195 struct zfcp_dbf_san_record_els els;
6bc473dd 196 } u;
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197#define ZFCP_DBF_SAN_MAX_PAYLOAD 1024
198 u8 payload[32];
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199} __attribute__ ((packed));
200
5771710b 201struct zfcp_dbf_scsi_record {
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202 u8 tag[ZFCP_DBF_TAG_SIZE];
203 u8 tag2[ZFCP_DBF_TAG_SIZE];
204 u32 scsi_id;
205 u32 scsi_lun;
206 u32 scsi_result;
207 u64 scsi_cmnd;
208 u64 scsi_serial;
209#define ZFCP_DBF_SCSI_OPCODE 16
210 u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE];
211 u8 scsi_retries;
212 u8 scsi_allowed;
213 u64 fsf_reqid;
214 u32 fsf_seqno;
215 u64 fsf_issued;
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216 u64 old_fsf_reqid;
217 u8 rsp_validity;
218 u8 rsp_scsi_status;
219 u32 rsp_resid;
220 u8 rsp_code;
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221#define ZFCP_DBF_SCSI_FCP_SNS_INFO 16
222#define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO 256
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223 u32 sns_info_len;
224 u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO];
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225} __attribute__ ((packed));
226
d46f384a 227struct zfcp_dbf {
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228 debug_info_t *rec;
229 debug_info_t *hba;
230 debug_info_t *san;
231 debug_info_t *scsi;
232 spinlock_t rec_lock;
233 spinlock_t hba_lock;
234 spinlock_t san_lock;
235 spinlock_t scsi_lock;
236 struct zfcp_dbf_rec_record rec_buf;
237 struct zfcp_dbf_hba_record hba_buf;
238 struct zfcp_dbf_san_record san_buf;
239 struct zfcp_dbf_scsi_record scsi_buf;
240 struct zfcp_adapter *adapter;
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241};
242
2e261af8 243static inline
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244void zfcp_dbf_hba_fsf_resp(const char *tag2, int level,
245 struct zfcp_fsf_req *req, struct zfcp_dbf *dbf)
2e261af8 246{
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247 if (level <= dbf->hba->level)
248 _zfcp_dbf_hba_fsf_response(tag2, level, req, dbf);
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249}
250
251/**
5771710b 252 * zfcp_dbf_hba_fsf_response - trace event for request completion
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253 * @fsf_req: request that has been completed
254 */
5771710b 255static inline void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req)
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256{
257 struct zfcp_dbf *dbf = req->adapter->dbf;
258 struct fsf_qtcb *qtcb = req->qtcb;
259
260 if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
261 (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
5771710b 262 zfcp_dbf_hba_fsf_resp("perr", 1, req, dbf);
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263
264 } else if (qtcb->header.fsf_status != FSF_GOOD) {
5771710b 265 zfcp_dbf_hba_fsf_resp("ferr", 1, req, dbf);
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266
267 } else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
268 (req->fsf_command == FSF_QTCB_OPEN_LUN)) {
5771710b 269 zfcp_dbf_hba_fsf_resp("open", 4, req, dbf);
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270
271 } else if (qtcb->header.log_length) {
5771710b 272 zfcp_dbf_hba_fsf_resp("qtcb", 5, req, dbf);
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273
274 } else {
5771710b 275 zfcp_dbf_hba_fsf_resp("norm", 6, req, dbf);
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276 }
277 }
278
279/**
5771710b 280 * zfcp_dbf_hba_fsf_unsol - trace event for an unsolicited status buffer
2e261af8 281 * @tag: tag indicating which kind of unsolicited status has been received
5771710b 282 * @dbf: reference to dbf structure
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283 * @status_buffer: buffer containing payload of unsolicited status
284 */
285static inline
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286void zfcp_dbf_hba_fsf_unsol(const char *tag, struct zfcp_dbf *dbf,
287 struct fsf_status_read_buffer *buf)
2e261af8 288{
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289 int level = 2;
290
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291 if (level <= dbf->hba->level)
292 _zfcp_dbf_hba_fsf_unsol(tag, level, dbf, buf);
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293}
294
dcd20e23 295static inline
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296void zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
297 struct zfcp_dbf *dbf, struct scsi_cmnd *scmd,
298 struct zfcp_fsf_req *req, unsigned long old_id)
dcd20e23 299{
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300 if (level <= dbf->scsi->level)
301 _zfcp_dbf_scsi(tag, tag2, level, dbf, scmd, req, old_id);
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302}
303
304/**
5771710b 305 * zfcp_dbf_scsi_result - trace event for SCSI command completion
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306 * @tag: tag indicating success or failure of SCSI command
307 * @level: trace level applicable for this event
308 * @adapter: adapter that has been used to issue the SCSI command
309 * @scmd: SCSI command pointer
310 * @fsf_req: request used to issue SCSI command (might be NULL)
311 */
312static inline
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313void zfcp_dbf_scsi_result(const char *tag, int level, struct zfcp_dbf *dbf,
314 struct scsi_cmnd *scmd, struct zfcp_fsf_req *fsf_req)
dcd20e23 315{
5771710b 316 zfcp_dbf_scsi("rslt", tag, level, dbf, scmd, fsf_req, 0);
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317}
318
319/**
5771710b 320 * zfcp_dbf_scsi_abort - trace event for SCSI command abort
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321 * @tag: tag indicating success or failure of abort operation
322 * @adapter: adapter thas has been used to issue SCSI command to be aborted
323 * @scmd: SCSI command to be aborted
324 * @new_req: request containing abort (might be NULL)
325 * @old_id: identifier of request containg SCSI command to be aborted
326 */
327static inline
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328void zfcp_dbf_scsi_abort(const char *tag, struct zfcp_dbf *dbf,
329 struct scsi_cmnd *scmd, struct zfcp_fsf_req *new_req,
330 unsigned long old_id)
dcd20e23 331{
5771710b 332 zfcp_dbf_scsi("abrt", tag, 1, dbf, scmd, new_req, old_id);
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333}
334
335/**
5771710b 336 * zfcp_dbf_scsi_devreset - trace event for Logical Unit or Target Reset
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337 * @tag: tag indicating success or failure of reset operation
338 * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
339 * @unit: unit that needs reset
340 * @scsi_cmnd: SCSI command which caused this error recovery
341 */
342static inline
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343void zfcp_dbf_scsi_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
344 struct scsi_cmnd *scsi_cmnd)
dcd20e23 345{
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346 zfcp_dbf_scsi(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
347 unit->port->adapter->dbf, scsi_cmnd, NULL, 0);
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348}
349
2b604c9b 350#endif /* ZFCP_DBF_H */