drivers/s390/scsi/zfcp_dbf.h

   1 /*
   2  * This file is part of the zfcp device driver for
   3  * FCP adapters for IBM System z9 and zSeries.
   4  *
   5  * Copyright IBM Corp. 2008, 2009
   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
  25 #include <scsi/fc/fc_fcp.h>
  26 #include "zfcp_ext.h"
  27 #include "zfcp_fsf.h"
  28 #include "zfcp_def.h"
  29
  30 #define ZFCP_DBF_TAG_SIZE      4
  31 #define ZFCP_DBF_ID_SIZE       7
  32
  33 #define ZFCP_DBF_INVALID_LUN    0xFFFFFFFFFFFFFFFFull
  34
  35 struct zfcp_dbf_dump {
  36         u8 tag[ZFCP_DBF_TAG_SIZE];
  37         u32 total_size;         /* size of total dump data */
  38         u32 offset;             /* how much data has being already dumped */
  39         u32 size;               /* how much data comes with this record */
  40         u8 data[];              /* dump data */
  41 } __attribute__ ((packed));
  42
  43 struct zfcp_dbf_rec_record_thread {
  44         u32 total;
  45         u32 ready;
  46         u32 running;
  47 };
  48
  49 struct zfcp_dbf_rec_record_target {
  50         u64 ref;
  51         u32 status;
  52         u32 d_id;
  53         u64 wwpn;
  54         u64 fcp_lun;
  55         u32 erp_count;
  56 };
  57
  58 struct zfcp_dbf_rec_record_trigger {
  59         u8 want;
  60         u8 need;
  61         u32 as;
  62         u32 ps;
  63         u32 us;
  64         u64 ref;
  65         u64 action;
  66         u64 wwpn;
  67         u64 fcp_lun;
  68 };
  69
  70 struct zfcp_dbf_rec_record_action {
  71         u32 status;
  72         u32 step;
  73         u64 action;
  74         u64 fsf_req;
  75 };
  76
  77 struct zfcp_dbf_rec_record {
  78         u8 id;
  79         char id2[7];
  80         union {
  81                 struct zfcp_dbf_rec_record_action action;
  82                 struct zfcp_dbf_rec_record_thread thread;
  83                 struct zfcp_dbf_rec_record_target target;
  84                 struct zfcp_dbf_rec_record_trigger trigger;
  85         } u;
  86 };
  87
  88 enum {
  89         ZFCP_REC_DBF_ID_ACTION,
  90         ZFCP_REC_DBF_ID_THREAD,
  91         ZFCP_REC_DBF_ID_TARGET,
  92         ZFCP_REC_DBF_ID_TRIGGER,
  93 };
  94
  95 struct zfcp_dbf_hba_record_response {
  96         u32 fsf_command;
  97         u64 fsf_reqid;
  98         u32 fsf_seqno;
  99         u64 fsf_issued;
 100         u32 fsf_prot_status;
 101         u32 fsf_status;
 102         u8 fsf_prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE];
 103         u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
 104         u32 fsf_req_status;
 105         u8 sbal_first;
 106         u8 sbal_last;
 107         u8 sbal_response;
 108         u8 pool;
 109         u64 erp_action;
 110         union {
 111                 struct {
 112                         u64 cmnd;
 113                         u64 serial;
 114                 } fcp;
 115                 struct {
 116                         u64 wwpn;
 117                         u32 d_id;
 118                         u32 port_handle;
 119                 } port;
 120                 struct {
 121                         u64 wwpn;
 122                         u64 fcp_lun;
 123                         u32 port_handle;
 124                         u32 lun_handle;
 125                 } unit;
 126                 struct {
 127                         u32 d_id;
 128                 } els;
 129         } u;
 130 } __attribute__ ((packed));
 131
 132 struct zfcp_dbf_hba_record_status {
 133         u8 failed;
 134         u32 status_type;
 135         u32 status_subtype;
 136         struct fsf_queue_designator
 137          queue_designator;
 138         u32 payload_size;
 139 #define ZFCP_DBF_UNSOL_PAYLOAD                          80
 140 #define ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL         32
 141 #define ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD      56
 142 #define ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT     2 * sizeof(u32)
 143         u8 payload[ZFCP_DBF_UNSOL_PAYLOAD];
 144 } __attribute__ ((packed));
 145
 146 struct zfcp_dbf_hba_record_qdio {
 147         u32 qdio_error;
 148         u8 sbal_index;
 149         u8 sbal_count;
 150 } __attribute__ ((packed));
 151
 152 struct zfcp_dbf_hba_record {
 153         u8 tag[ZFCP_DBF_TAG_SIZE];
 154         u8 tag2[ZFCP_DBF_TAG_SIZE];
 155         union {
 156                 struct zfcp_dbf_hba_record_response response;
 157                 struct zfcp_dbf_hba_record_status status;
 158                 struct zfcp_dbf_hba_record_qdio qdio;
 159                 struct fsf_bit_error_payload berr;
 160         } u;
 161 } __attribute__ ((packed));
 162
 163 struct zfcp_dbf_san_record_ct_request {
 164         u16 cmd_req_code;
 165         u8 revision;
 166         u8 gs_type;
 167         u8 gs_subtype;
 168         u8 options;
 169         u16 max_res_size;
 170         u32 len;
 171         u32 d_id;
 172 } __attribute__ ((packed));
 173
 174 struct zfcp_dbf_san_record_ct_response {
 175         u16 cmd_rsp_code;
 176         u8 revision;
 177         u8 reason_code;
 178         u8 expl;
 179         u8 vendor_unique;
 180         u16 max_res_size;
 181         u32 len;
 182 } __attribute__ ((packed));
 183
 184 struct zfcp_dbf_san_record_els {
 185         u32 d_id;
 186 } __attribute__ ((packed));
 187
 188 struct zfcp_dbf_san_record {
 189         u8 tag[ZFCP_DBF_TAG_SIZE];
 190         u64 fsf_reqid;
 191         u32 fsf_seqno;
 192         union {
 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;
 196         } u;
 197 } __attribute__ ((packed));
 198
 199 #define ZFCP_DBF_SAN_MAX_PAYLOAD 1024
 200
 201 struct zfcp_dbf_scsi_record {
 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;
 216         u64 old_fsf_reqid;
 217         u8 rsp_validity;
 218         u8 rsp_scsi_status;
 219         u32 rsp_resid;
 220         u8 rsp_code;
 221 #define ZFCP_DBF_SCSI_FCP_SNS_INFO      16
 222 #define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO  256
 223         u32 sns_info_len;
 224         u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO];
 225 } __attribute__ ((packed));
 226
 227 struct zfcp_dbf {
 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;
 241 };
 242
 243 static inline
 244 void zfcp_dbf_hba_fsf_resp(const char *tag2, int level,
 245                            struct zfcp_fsf_req *req, struct zfcp_dbf *dbf)
 246 {
 247         if (level <= dbf->hba->level)
 248                 _zfcp_dbf_hba_fsf_response(tag2, level, req, dbf);
 249 }
 250
 251 /**
 252  * zfcp_dbf_hba_fsf_response - trace event for request completion
 253  * @fsf_req: request that has been completed
 254  */
 255 static inline void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req)
 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)) {
 262                 zfcp_dbf_hba_fsf_resp("perr", 1, req, dbf);
 263
 264         } else if (qtcb->header.fsf_status != FSF_GOOD) {
 265                 zfcp_dbf_hba_fsf_resp("ferr", 1, req, dbf);
 266
 267         } else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 268                    (req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 269                 zfcp_dbf_hba_fsf_resp("open", 4, req, dbf);
 270
 271         } else if (qtcb->header.log_length) {
 272                 zfcp_dbf_hba_fsf_resp("qtcb", 5, req, dbf);
 273
 274         } else {
 275                 zfcp_dbf_hba_fsf_resp("norm", 6, req, dbf);
 276         }
 277  }
 278
 279 /**
 280  * zfcp_dbf_hba_fsf_unsol - trace event for an unsolicited status buffer
 281  * @tag: tag indicating which kind of unsolicited status has been received
 282  * @dbf: reference to dbf structure
 283  * @status_buffer: buffer containing payload of unsolicited status
 284  */
 285 static inline
 286 void zfcp_dbf_hba_fsf_unsol(const char *tag, struct zfcp_dbf *dbf,
 287                             struct fsf_status_read_buffer *buf)
 288 {
 289         int level = 2;
 290
 291         if (level <= dbf->hba->level)
 292                 _zfcp_dbf_hba_fsf_unsol(tag, level, dbf, buf);
 293 }
 294
 295 static inline
 296 void 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)
 299 {
 300         if (level <= dbf->scsi->level)
 301                 _zfcp_dbf_scsi(tag, tag2, level, dbf, scmd, req, old_id);
 302 }
 303
 304 /**
 305  * zfcp_dbf_scsi_result - trace event for SCSI command completion
 306  * @dbf: adapter dbf trace
 307  * @scmd: SCSI command pointer
 308  * @req: FSF request used to issue SCSI command
 309  */
 310 static inline
 311 void zfcp_dbf_scsi_result(struct zfcp_dbf *dbf, struct scsi_cmnd *scmd,
 312                           struct zfcp_fsf_req *req)
 313 {
 314         if (scmd->result != 0)
 315                 zfcp_dbf_scsi("rslt", "erro", 3, dbf, scmd, req, 0);
 316         else if (scmd->retries > 0)
 317                 zfcp_dbf_scsi("rslt", "retr", 4, dbf, scmd, req, 0);
 318         else
 319                 zfcp_dbf_scsi("rslt", "norm", 6, dbf, scmd, req, 0);
 320 }
 321
 322 /**
 323  * zfcp_dbf_scsi_fail_send - trace event for failure to send SCSI command
 324  * @dbf: adapter dbf trace
 325  * @scmd: SCSI command pointer
 326  */
 327 static inline
 328 void zfcp_dbf_scsi_fail_send(struct zfcp_dbf *dbf, struct scsi_cmnd *scmd)
 329 {
 330         zfcp_dbf_scsi("rslt", "fail", 4, dbf, scmd, NULL, 0);
 331 }
 332
 333 /**
 334  * zfcp_dbf_scsi_abort - trace event for SCSI command abort
 335  * @tag: tag indicating success or failure of abort operation
 336  * @adapter: adapter thas has been used to issue SCSI command to be aborted
 337  * @scmd: SCSI command to be aborted
 338  * @new_req: request containing abort (might be NULL)
 339  * @old_id: identifier of request containg SCSI command to be aborted
 340  */
 341 static inline
 342 void zfcp_dbf_scsi_abort(const char *tag, struct zfcp_dbf *dbf,
 343                          struct scsi_cmnd *scmd, struct zfcp_fsf_req *new_req,
 344                          unsigned long old_id)
 345 {
 346         zfcp_dbf_scsi("abrt", tag, 1, dbf, scmd, new_req, old_id);
 347 }
 348
 349 /**
 350  * zfcp_dbf_scsi_devreset - trace event for Logical Unit or Target Reset
 351  * @tag: tag indicating success or failure of reset operation
 352  * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
 353  * @unit: unit that needs reset
 354  * @scsi_cmnd: SCSI command which caused this error recovery
 355  */
 356 static inline
 357 void zfcp_dbf_scsi_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
 358                             struct scsi_cmnd *scsi_cmnd)
 359 {
 360         zfcp_dbf_scsi(flag == FCP_TMF_TGT_RESET ? "trst" : "lrst", tag, 1,
 361                             unit->port->adapter->dbf, scsi_cmnd, NULL, 0);
 362 }
 363
 364 #endif /* ZFCP_DBF_H */