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