drivers/scsi/qla2xxx/qla_dfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic Fibre Channel HBA Driver
   4  * Copyright (c)  2003-2014 QLogic Corporation
   5  */
   6 #include "qla_def.h"
   7
   8 #include <linux/debugfs.h>
   9 #include <linux/seq_file.h>
  10
  11 static struct dentry *qla2x00_dfs_root;
  12 static atomic_t qla2x00_dfs_root_count;
  13
  14 #define QLA_DFS_RPORT_DEVLOSS_TMO       1
  15
  16 static int
  17 qla_dfs_rport_get(struct fc_port *fp, int attr_id, u64 *val)
  18 {
  19         switch (attr_id) {
  20         case QLA_DFS_RPORT_DEVLOSS_TMO:
  21                 /* Only supported for FC-NVMe devices that are registered. */
  22                 if (!(fp->nvme_flag & NVME_FLAG_REGISTERED))
  23                         return -EIO;
  24                 *val = fp->nvme_remote_port->dev_loss_tmo;
  25                 break;
  26         default:
  27                 return -EINVAL;
  28         }
  29         return 0;
  30 }
  31
  32 static int
  33 qla_dfs_rport_set(struct fc_port *fp, int attr_id, u64 val)
  34 {
  35         switch (attr_id) {
  36         case QLA_DFS_RPORT_DEVLOSS_TMO:
  37                 /* Only supported for FC-NVMe devices that are registered. */
  38                 if (!(fp->nvme_flag & NVME_FLAG_REGISTERED))
  39                         return -EIO;
  40 #if (IS_ENABLED(CONFIG_NVME_FC))
  41                 return nvme_fc_set_remoteport_devloss(fp->nvme_remote_port,
  42                                                       val);
  43 #else /* CONFIG_NVME_FC */
  44                 return -EINVAL;
  45 #endif /* CONFIG_NVME_FC */
  46         default:
  47                 return -EINVAL;
  48         }
  49         return 0;
  50 }
  51
  52 #define DEFINE_QLA_DFS_RPORT_RW_ATTR(_attr_id, _attr)           \
  53 static int qla_dfs_rport_##_attr##_get(void *data, u64 *val)    \
  54 {                                                               \
  55         struct fc_port *fp = data;                              \
  56         return qla_dfs_rport_get(fp, _attr_id, val);            \
  57 }                                                               \
  58 static int qla_dfs_rport_##_attr##_set(void *data, u64 val)     \
  59 {                                                               \
  60         struct fc_port *fp = data;                              \
  61         return qla_dfs_rport_set(fp, _attr_id, val);            \
  62 }                                                               \
  63 DEFINE_DEBUGFS_ATTRIBUTE(qla_dfs_rport_##_attr##_fops,          \
  64                 qla_dfs_rport_##_attr##_get,                    \
  65                 qla_dfs_rport_##_attr##_set, "%llu\n")
  66
  67 /*
  68  * Wrapper for getting fc_port fields.
  69  *
  70  * _attr    : Attribute name.
  71  * _get_val : Accessor macro to retrieve the value.
  72  */
  73 #define DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, _get_val)                 \
  74 static int qla_dfs_rport_field_##_attr##_get(void *data, u64 *val)      \
  75 {                                                                       \
  76         struct fc_port *fp = data;                                      \
  77         *val = _get_val;                                                \
  78         return 0;                                                       \
  79 }                                                                       \
  80 DEFINE_DEBUGFS_ATTRIBUTE(qla_dfs_rport_field_##_attr##_fops,            \
  81                 qla_dfs_rport_field_##_attr##_get,                      \
  82                 NULL, "%llu\n")
  83
  84 #define DEFINE_QLA_DFS_RPORT_ACCESS(_attr, _get_val) \
  85         DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, _get_val)
  86
  87 #define DEFINE_QLA_DFS_RPORT_FIELD(_attr) \
  88         DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, fp->_attr)
  89
  90 DEFINE_QLA_DFS_RPORT_RW_ATTR(QLA_DFS_RPORT_DEVLOSS_TMO, dev_loss_tmo);
  91
  92 DEFINE_QLA_DFS_RPORT_FIELD(disc_state);
  93 DEFINE_QLA_DFS_RPORT_FIELD(scan_state);
  94 DEFINE_QLA_DFS_RPORT_FIELD(fw_login_state);
  95 DEFINE_QLA_DFS_RPORT_FIELD(login_pause);
  96 DEFINE_QLA_DFS_RPORT_FIELD(flags);
  97 DEFINE_QLA_DFS_RPORT_FIELD(nvme_flag);
  98 DEFINE_QLA_DFS_RPORT_FIELD(last_rscn_gen);
  99 DEFINE_QLA_DFS_RPORT_FIELD(rscn_gen);
 100 DEFINE_QLA_DFS_RPORT_FIELD(login_gen);
 101 DEFINE_QLA_DFS_RPORT_FIELD(loop_id);
 102 DEFINE_QLA_DFS_RPORT_FIELD_GET(port_id, fp->d_id.b24);
 103 DEFINE_QLA_DFS_RPORT_FIELD_GET(sess_kref, kref_read(&fp->sess_kref));
 104
 105 void
 106 qla2x00_dfs_create_rport(scsi_qla_host_t *vha, struct fc_port *fp)
 107 {
 108         char wwn[32];
 109
 110 #define QLA_CREATE_RPORT_FIELD_ATTR(_attr)                      \
 111         debugfs_create_file(#_attr, 0400, fp->dfs_rport_dir,    \
 112                 fp, &qla_dfs_rport_field_##_attr##_fops)
 113
 114         if (!vha->dfs_rport_root || fp->dfs_rport_dir)
 115                 return;
 116
 117         sprintf(wwn, "pn-%016llx", wwn_to_u64(fp->port_name));
 118         fp->dfs_rport_dir = debugfs_create_dir(wwn, vha->dfs_rport_root);
 119         if (!fp->dfs_rport_dir)
 120                 return;
 121         if (NVME_TARGET(vha->hw, fp))
 122                 debugfs_create_file("dev_loss_tmo", 0600, fp->dfs_rport_dir,
 123                                     fp, &qla_dfs_rport_dev_loss_tmo_fops);
 124
 125         QLA_CREATE_RPORT_FIELD_ATTR(disc_state);
 126         QLA_CREATE_RPORT_FIELD_ATTR(scan_state);
 127         QLA_CREATE_RPORT_FIELD_ATTR(fw_login_state);
 128         QLA_CREATE_RPORT_FIELD_ATTR(login_pause);
 129         QLA_CREATE_RPORT_FIELD_ATTR(flags);
 130         QLA_CREATE_RPORT_FIELD_ATTR(nvme_flag);
 131         QLA_CREATE_RPORT_FIELD_ATTR(last_rscn_gen);
 132         QLA_CREATE_RPORT_FIELD_ATTR(rscn_gen);
 133         QLA_CREATE_RPORT_FIELD_ATTR(login_gen);
 134         QLA_CREATE_RPORT_FIELD_ATTR(loop_id);
 135         QLA_CREATE_RPORT_FIELD_ATTR(port_id);
 136         QLA_CREATE_RPORT_FIELD_ATTR(sess_kref);
 137 }
 138
 139 void
 140 qla2x00_dfs_remove_rport(scsi_qla_host_t *vha, struct fc_port *fp)
 141 {
 142         if (!vha->dfs_rport_root || !fp->dfs_rport_dir)
 143                 return;
 144         debugfs_remove_recursive(fp->dfs_rport_dir);
 145         fp->dfs_rport_dir = NULL;
 146 }
 147
 148 static int
 149 qla2x00_dfs_tgt_sess_show(struct seq_file *s, void *unused)
 150 {
 151         scsi_qla_host_t *vha = s->private;
 152         struct qla_hw_data *ha = vha->hw;
 153         unsigned long flags;
 154         struct fc_port *sess = NULL;
 155         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 156
 157         seq_printf(s, "%s\n", vha->host_str);
 158         if (tgt) {
 159                 seq_puts(s, "Port ID   Port Name                Handle\n");
 160
 161                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 162                 list_for_each_entry(sess, &vha->vp_fcports, list)
 163                         seq_printf(s, "%02x:%02x:%02x  %8phC  %d\n",
 164                             sess->d_id.b.domain, sess->d_id.b.area,
 165                             sess->d_id.b.al_pa, sess->port_name,
 166                             sess->loop_id);
 167                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 168         }
 169
 170         return 0;
 171 }
 172
 173 DEFINE_SHOW_ATTRIBUTE(qla2x00_dfs_tgt_sess);
 174
 175 static int
 176 qla2x00_dfs_tgt_port_database_show(struct seq_file *s, void *unused)
 177 {
 178         scsi_qla_host_t *vha = s->private;
 179         struct qla_hw_data *ha = vha->hw;
 180         struct gid_list_info *gid_list;
 181         dma_addr_t gid_list_dma;
 182         fc_port_t fc_port;
 183         char *id_iter;
 184         int rc, i;
 185         uint16_t entries, loop_id;
 186
 187         seq_printf(s, "%s\n", vha->host_str);
 188         gid_list = dma_alloc_coherent(&ha->pdev->dev,
 189                                       qla2x00_gid_list_size(ha),
 190                                       &gid_list_dma, GFP_KERNEL);
 191         if (!gid_list) {
 192                 ql_dbg(ql_dbg_user, vha, 0x7018,
 193                        "DMA allocation failed for %u\n",
 194                        qla2x00_gid_list_size(ha));
 195                 return 0;
 196         }
 197
 198         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma,
 199                                   &entries);
 200         if (rc != QLA_SUCCESS)
 201                 goto out_free_id_list;
 202
 203         id_iter = (char *)gid_list;
 204
 205         seq_puts(s, "Port Name  Port ID         Loop ID\n");
 206
 207         for (i = 0; i < entries; i++) {
 208                 struct gid_list_info *gid =
 209                         (struct gid_list_info *)id_iter;
 210                 loop_id = le16_to_cpu(gid->loop_id);
 211                 memset(&fc_port, 0, sizeof(fc_port_t));
 212
 213                 fc_port.loop_id = loop_id;
 214
 215                 rc = qla24xx_gpdb_wait(vha, &fc_port, 0);
 216                 seq_printf(s, "%8phC  %02x%02x%02x  %d\n",
 217                            fc_port.port_name, fc_port.d_id.b.domain,
 218                            fc_port.d_id.b.area, fc_port.d_id.b.al_pa,
 219                            fc_port.loop_id);
 220                 id_iter += ha->gid_list_info_size;
 221         }
 222 out_free_id_list:
 223         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 224                           gid_list, gid_list_dma);
 225
 226         return 0;
 227 }
 228
 229 DEFINE_SHOW_ATTRIBUTE(qla2x00_dfs_tgt_port_database);
 230
 231 static int
 232 qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
 233 {
 234         struct scsi_qla_host *vha = s->private;
 235         uint16_t mb[MAX_IOCB_MB_REG];
 236         int rc;
 237         struct qla_hw_data *ha = vha->hw;
 238         u16 iocbs_used, i, exch_used;
 239
 240         rc = qla24xx_res_count_wait(vha, mb, SIZEOF_IOCB_MB_REG);
 241         if (rc != QLA_SUCCESS) {
 242                 seq_printf(s, "Mailbox Command failed %d, mb %#x", rc, mb[0]);
 243         } else {
 244                 seq_puts(s, "FW Resource count\n\n");
 245                 seq_printf(s, "Original TGT exchg count[%d]\n", mb[1]);
 246                 seq_printf(s, "Current TGT exchg count[%d]\n", mb[2]);
 247                 seq_printf(s, "Current Initiator Exchange count[%d]\n", mb[3]);
 248                 seq_printf(s, "Original Initiator Exchange count[%d]\n", mb[6]);
 249                 seq_printf(s, "Current IOCB count[%d]\n", mb[7]);
 250                 seq_printf(s, "Original IOCB count[%d]\n", mb[10]);
 251                 seq_printf(s, "MAX VP count[%d]\n", mb[11]);
 252                 seq_printf(s, "MAX FCF count[%d]\n", mb[12]);
 253                 seq_printf(s, "Current free pageable XCB buffer cnt[%d]\n",
 254                     mb[20]);
 255                 seq_printf(s, "Original Initiator fast XCB buffer cnt[%d]\n",
 256                     mb[21]);
 257                 seq_printf(s, "Current free Initiator fast XCB buffer cnt[%d]\n",
 258                     mb[22]);
 259                 seq_printf(s, "Original Target fast XCB buffer cnt[%d]\n",
 260                     mb[23]);
 261         }
 262
 263         if (ql2xenforce_iocb_limit) {
 264                 /* lock is not require. It's an estimate. */
 265                 iocbs_used = ha->base_qpair->fwres.iocbs_used;
 266                 exch_used = ha->base_qpair->fwres.exch_used;
 267                 for (i = 0; i < ha->max_qpairs; i++) {
 268                         if (ha->queue_pair_map[i]) {
 269                                 iocbs_used += ha->queue_pair_map[i]->fwres.iocbs_used;
 270                                 exch_used += ha->queue_pair_map[i]->fwres.exch_used;
 271                         }
 272                 }
 273
 274                 seq_printf(s, "Driver: estimate iocb used [%d] high water limit [%d]\n",
 275                            iocbs_used, ha->base_qpair->fwres.iocbs_limit);
 276
 277                 seq_printf(s, "estimate exchange used[%d] high water limit [%d] n",
 278                            exch_used, ha->base_qpair->fwres.exch_limit);
 279         }
 280
 281         return 0;
 282 }
 283
 284 DEFINE_SHOW_ATTRIBUTE(qla_dfs_fw_resource_cnt);
 285
 286 static int
 287 qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
 288 {
 289         struct scsi_qla_host *vha = s->private;
 290         struct qla_qpair *qpair = vha->hw->base_qpair;
 291         uint64_t qla_core_sbt_cmd, core_qla_que_buf, qla_core_ret_ctio,
 292                 core_qla_snd_status, qla_core_ret_sta_ctio, core_qla_free_cmd,
 293                 num_q_full_sent, num_alloc_iocb_failed, num_term_xchg_sent;
 294         u16 i;
 295         fc_port_t *fcport = NULL;
 296
 297         if (qla2x00_chip_is_down(vha))
 298                 return 0;
 299
 300         qla_core_sbt_cmd = qpair->tgt_counters.qla_core_sbt_cmd;
 301         core_qla_que_buf = qpair->tgt_counters.core_qla_que_buf;
 302         qla_core_ret_ctio = qpair->tgt_counters.qla_core_ret_ctio;
 303         core_qla_snd_status = qpair->tgt_counters.core_qla_snd_status;
 304         qla_core_ret_sta_ctio = qpair->tgt_counters.qla_core_ret_sta_ctio;
 305         core_qla_free_cmd = qpair->tgt_counters.core_qla_free_cmd;
 306         num_q_full_sent = qpair->tgt_counters.num_q_full_sent;
 307         num_alloc_iocb_failed = qpair->tgt_counters.num_alloc_iocb_failed;
 308         num_term_xchg_sent = qpair->tgt_counters.num_term_xchg_sent;
 309
 310         for (i = 0; i < vha->hw->max_qpairs; i++) {
 311                 qpair = vha->hw->queue_pair_map[i];
 312                 if (!qpair)
 313                         continue;
 314                 qla_core_sbt_cmd += qpair->tgt_counters.qla_core_sbt_cmd;
 315                 core_qla_que_buf += qpair->tgt_counters.core_qla_que_buf;
 316                 qla_core_ret_ctio += qpair->tgt_counters.qla_core_ret_ctio;
 317                 core_qla_snd_status += qpair->tgt_counters.core_qla_snd_status;
 318                 qla_core_ret_sta_ctio +=
 319                     qpair->tgt_counters.qla_core_ret_sta_ctio;
 320                 core_qla_free_cmd += qpair->tgt_counters.core_qla_free_cmd;
 321                 num_q_full_sent += qpair->tgt_counters.num_q_full_sent;
 322                 num_alloc_iocb_failed +=
 323                     qpair->tgt_counters.num_alloc_iocb_failed;
 324                 num_term_xchg_sent += qpair->tgt_counters.num_term_xchg_sent;
 325         }
 326
 327         seq_puts(s, "Target Counters\n");
 328         seq_printf(s, "qla_core_sbt_cmd = %lld\n",
 329                 qla_core_sbt_cmd);
 330         seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
 331                 qla_core_ret_sta_ctio);
 332         seq_printf(s, "qla_core_ret_ctio = %lld\n",
 333                 qla_core_ret_ctio);
 334         seq_printf(s, "core_qla_que_buf = %lld\n",
 335                 core_qla_que_buf);
 336         seq_printf(s, "core_qla_snd_status = %lld\n",
 337                 core_qla_snd_status);
 338         seq_printf(s, "core_qla_free_cmd = %lld\n",
 339                 core_qla_free_cmd);
 340         seq_printf(s, "num alloc iocb failed = %lld\n",
 341                 num_alloc_iocb_failed);
 342         seq_printf(s, "num term exchange sent = %lld\n",
 343                 num_term_xchg_sent);
 344         seq_printf(s, "num Q full sent = %lld\n",
 345                 num_q_full_sent);
 346
 347         /* DIF stats */
 348         seq_printf(s, "DIF Inp Bytes = %lld\n",
 349                 vha->qla_stats.qla_dif_stats.dif_input_bytes);
 350         seq_printf(s, "DIF Outp Bytes = %lld\n",
 351                 vha->qla_stats.qla_dif_stats.dif_output_bytes);
 352         seq_printf(s, "DIF Inp Req = %lld\n",
 353                 vha->qla_stats.qla_dif_stats.dif_input_requests);
 354         seq_printf(s, "DIF Outp Req = %lld\n",
 355                 vha->qla_stats.qla_dif_stats.dif_output_requests);
 356         seq_printf(s, "DIF Guard err = %d\n",
 357                 vha->qla_stats.qla_dif_stats.dif_guard_err);
 358         seq_printf(s, "DIF Ref tag err = %d\n",
 359                 vha->qla_stats.qla_dif_stats.dif_ref_tag_err);
 360         seq_printf(s, "DIF App tag err = %d\n",
 361                 vha->qla_stats.qla_dif_stats.dif_app_tag_err);
 362
 363         seq_puts(s, "\n");
 364         seq_puts(s, "Initiator Error Counters\n");
 365         seq_printf(s, "HW Error Count =         %14lld\n",
 366                    vha->hw_err_cnt);
 367         seq_printf(s, "Link Down Count =        %14lld\n",
 368                    vha->short_link_down_cnt);
 369         seq_printf(s, "Interface Err Count =    %14lld\n",
 370                    vha->interface_err_cnt);
 371         seq_printf(s, "Cmd Timeout Count =      %14lld\n",
 372                    vha->cmd_timeout_cnt);
 373         seq_printf(s, "Reset Count =            %14lld\n",
 374                    vha->reset_cmd_err_cnt);
 375         seq_puts(s, "\n");
 376
 377         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 378                 if (!fcport->rport)
 379                         continue;
 380
 381                 seq_printf(s, "Target Num = %7d Link Down Count = %14lld\n",
 382                            fcport->rport->number, fcport->tgt_short_link_down_cnt);
 383         }
 384         seq_puts(s, "\n");
 385
 386         return 0;
 387 }
 388
 389 DEFINE_SHOW_ATTRIBUTE(qla_dfs_tgt_counters);
 390
 391 static int
 392 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
 393 {
 394         scsi_qla_host_t *vha = s->private;
 395         uint32_t cnt;
 396         uint32_t *fce;
 397         uint64_t fce_start;
 398         struct qla_hw_data *ha = vha->hw;
 399
 400         mutex_lock(&ha->fce_mutex);
 401
 402         seq_puts(s, "FCE Trace Buffer\n");
 403         seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
 404         seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
 405         seq_puts(s, "FCE Enable Registers\n");
 406         seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
 407             ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
 408             ha->fce_mb[5], ha->fce_mb[6]);
 409
 410         fce = (uint32_t *) ha->fce;
 411         fce_start = (unsigned long long) ha->fce_dma;
 412         for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
 413                 if (cnt % 8 == 0)
 414                         seq_printf(s, "\n%llx: ",
 415                             (unsigned long long)((cnt * 4) + fce_start));
 416                 else
 417                         seq_putc(s, ' ');
 418                 seq_printf(s, "%08x", *fce++);
 419         }
 420
 421         seq_puts(s, "\nEnd\n");
 422
 423         mutex_unlock(&ha->fce_mutex);
 424
 425         return 0;
 426 }
 427
 428 static int
 429 qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
 430 {
 431         scsi_qla_host_t *vha = inode->i_private;
 432         struct qla_hw_data *ha = vha->hw;
 433         int rval;
 434
 435         if (!ha->flags.fce_enabled)
 436                 goto out;
 437
 438         mutex_lock(&ha->fce_mutex);
 439
 440         /* Pause tracing to flush FCE buffers. */
 441         rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
 442         if (rval)
 443                 ql_dbg(ql_dbg_user, vha, 0x705c,
 444                     "DebugFS: Unable to disable FCE (%d).\n", rval);
 445
 446         ha->flags.fce_enabled = 0;
 447
 448         mutex_unlock(&ha->fce_mutex);
 449 out:
 450         return single_open(file, qla2x00_dfs_fce_show, vha);
 451 }
 452
 453 static int
 454 qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
 455 {
 456         scsi_qla_host_t *vha = inode->i_private;
 457         struct qla_hw_data *ha = vha->hw;
 458         int rval;
 459
 460         if (ha->flags.fce_enabled)
 461                 goto out;
 462
 463         mutex_lock(&ha->fce_mutex);
 464
 465         /* Re-enable FCE tracing. */
 466         ha->flags.fce_enabled = 1;
 467         memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
 468         rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
 469             ha->fce_mb, &ha->fce_bufs);
 470         if (rval) {
 471                 ql_dbg(ql_dbg_user, vha, 0x700d,
 472                     "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
 473                 ha->flags.fce_enabled = 0;
 474         }
 475
 476         mutex_unlock(&ha->fce_mutex);
 477 out:
 478         return single_release(inode, file);
 479 }
 480
 481 static const struct file_operations dfs_fce_ops = {
 482         .open           = qla2x00_dfs_fce_open,
 483         .read           = seq_read,
 484         .llseek         = seq_lseek,
 485         .release        = qla2x00_dfs_fce_release,
 486 };
 487
 488 static int
 489 qla_dfs_naqp_show(struct seq_file *s, void *unused)
 490 {
 491         struct scsi_qla_host *vha = s->private;
 492         struct qla_hw_data *ha = vha->hw;
 493
 494         seq_printf(s, "%d\n", ha->tgt.num_act_qpairs);
 495         return 0;
 496 }
 497
 498 /*
 499  * Helper macros for setting up debugfs entries.
 500  * _name: The name of the debugfs entry
 501  * _ctx_struct: The context that was passed when creating the debugfs file
 502  *
 503  * QLA_DFS_SETUP_RD could be used when there is only a show function.
 504  * - show function take the name qla_dfs_<sysfs-name>_show
 505  *
 506  * QLA_DFS_SETUP_RW could be used when there are both show and write functions.
 507  * - show function take the name  qla_dfs_<sysfs-name>_show
 508  * - write function take the name qla_dfs_<sysfs-name>_write
 509  *
 510  * To have a new debugfs entry, do:
 511  * 1. Create a "struct dentry *" in the appropriate structure in the format
 512  * dfs_<sysfs-name>
 513  * 2. Setup debugfs entries using QLA_DFS_SETUP_RD / QLA_DFS_SETUP_RW
 514  * 3. Create debugfs file in qla2x00_dfs_setup() using QLA_DFS_CREATE_FILE
 515  * or QLA_DFS_ROOT_CREATE_FILE
 516  * 4. Remove debugfs file in qla2x00_dfs_remove() using QLA_DFS_REMOVE_FILE
 517  * or QLA_DFS_ROOT_REMOVE_FILE
 518  *
 519  * Example for creating "TEST" sysfs file:
 520  * 1. struct qla_hw_data { ... struct dentry *dfs_TEST; }
 521  * 2. QLA_DFS_SETUP_RD(TEST, scsi_qla_host_t);
 522  * 3. In qla2x00_dfs_setup():
 523  * QLA_DFS_CREATE_FILE(ha, TEST, 0600, ha->dfs_dir, vha);
 524  * 4. In qla2x00_dfs_remove():
 525  * QLA_DFS_REMOVE_FILE(ha, TEST);
 526  */
 527 #define QLA_DFS_SETUP_RD(_name, _ctx_struct)                            \
 528 static int                                                              \
 529 qla_dfs_##_name##_open(struct inode *inode, struct file *file)          \
 530 {                                                                       \
 531         _ctx_struct *__ctx = inode->i_private;                          \
 532                                                                         \
 533         return single_open(file, qla_dfs_##_name##_show, __ctx);        \
 534 }                                                                       \
 535                                                                         \
 536 static const struct file_operations qla_dfs_##_name##_ops = {           \
 537         .open           = qla_dfs_##_name##_open,                       \
 538         .read           = seq_read,                                     \
 539         .llseek         = seq_lseek,                                    \
 540         .release        = single_release,                               \
 541 };
 542
 543 #define QLA_DFS_SETUP_RW(_name, _ctx_struct)                            \
 544 static int                                                              \
 545 qla_dfs_##_name##_open(struct inode *inode, struct file *file)          \
 546 {                                                                       \
 547         _ctx_struct *__ctx = inode->i_private;                          \
 548                                                                         \
 549         return single_open(file, qla_dfs_##_name##_show, __ctx);        \
 550 }                                                                       \
 551                                                                         \
 552 static const struct file_operations qla_dfs_##_name##_ops = {           \
 553         .open           = qla_dfs_##_name##_open,                       \
 554         .read           = seq_read,                                     \
 555         .llseek         = seq_lseek,                                    \
 556         .release        = single_release,                               \
 557         .write          = qla_dfs_##_name##_write,                      \
 558 };
 559
 560 #define QLA_DFS_ROOT_CREATE_FILE(_name, _perm, _ctx)                    \
 561         do {                                                            \
 562                 if (!qla_dfs_##_name)                                   \
 563                         qla_dfs_##_name = debugfs_create_file(#_name,   \
 564                                         _perm, qla2x00_dfs_root, _ctx,  \
 565                                         &qla_dfs_##_name##_ops);        \
 566         } while (0)
 567
 568 #define QLA_DFS_ROOT_REMOVE_FILE(_name)                                 \
 569         do {                                                            \
 570                 if (qla_dfs_##_name) {                                  \
 571                         debugfs_remove(qla_dfs_##_name);                \
 572                         qla_dfs_##_name = NULL;                         \
 573                 }                                                       \
 574         } while (0)
 575
 576 #define QLA_DFS_CREATE_FILE(_struct, _name, _perm, _parent, _ctx)       \
 577         do {                                                            \
 578                 (_struct)->dfs_##_name = debugfs_create_file(#_name,    \
 579                                         _perm, _parent, _ctx,           \
 580                                         &qla_dfs_##_name##_ops)         \
 581         } while (0)
 582
 583 #define QLA_DFS_REMOVE_FILE(_struct, _name)                             \
 584         do {                                                            \
 585                 if ((_struct)->dfs_##_name) {                           \
 586                         debugfs_remove((_struct)->dfs_##_name);         \
 587                         (_struct)->dfs_##_name = NULL;                  \
 588                 }                                                       \
 589         } while (0)
 590
 591 static int
 592 qla_dfs_naqp_open(struct inode *inode, struct file *file)
 593 {
 594         struct scsi_qla_host *vha = inode->i_private;
 595
 596         return single_open(file, qla_dfs_naqp_show, vha);
 597 }
 598
 599 static ssize_t
 600 qla_dfs_naqp_write(struct file *file, const char __user *buffer,
 601     size_t count, loff_t *pos)
 602 {
 603         struct seq_file *s = file->private_data;
 604         struct scsi_qla_host *vha = s->private;
 605         struct qla_hw_data *ha = vha->hw;
 606         char *buf;
 607         int rc = 0;
 608         unsigned long num_act_qp;
 609
 610         if (!(IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha))) {
 611                 pr_err("host%ld: this adapter does not support Multi Q.",
 612                     vha->host_no);
 613                 return -EINVAL;
 614         }
 615
 616         if (!vha->flags.qpairs_available) {
 617                 pr_err("host%ld: Driver is not setup with Multi Q.",
 618                     vha->host_no);
 619                 return -EINVAL;
 620         }
 621         buf = memdup_user_nul(buffer, count);
 622         if (IS_ERR(buf)) {
 623                 pr_err("host%ld: fail to copy user buffer.",
 624                     vha->host_no);
 625                 return PTR_ERR(buf);
 626         }
 627
 628         num_act_qp = simple_strtoul(buf, NULL, 0);
 629
 630         if (num_act_qp >= vha->hw->max_qpairs) {
 631                 pr_err("User set invalid number of qpairs %lu. Max = %d",
 632                     num_act_qp, vha->hw->max_qpairs);
 633                 rc = -EINVAL;
 634                 goto out_free;
 635         }
 636
 637         if (num_act_qp != ha->tgt.num_act_qpairs) {
 638                 ha->tgt.num_act_qpairs = num_act_qp;
 639                 qlt_clr_qp_table(vha);
 640         }
 641         rc = count;
 642 out_free:
 643         kfree(buf);
 644         return rc;
 645 }
 646
 647 static const struct file_operations dfs_naqp_ops = {
 648         .open           = qla_dfs_naqp_open,
 649         .read           = seq_read,
 650         .llseek         = seq_lseek,
 651         .release        = single_release,
 652         .write          = qla_dfs_naqp_write,
 653 };
 654
 655
 656 int
 657 qla2x00_dfs_setup(scsi_qla_host_t *vha)
 658 {
 659         struct qla_hw_data *ha = vha->hw;
 660
 661         if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
 662             !IS_QLA27XX(ha) && !IS_QLA28XX(ha))
 663                 goto out;
 664         if (!ha->fce)
 665                 goto out;
 666
 667         if (qla2x00_dfs_root)
 668                 goto create_dir;
 669
 670         atomic_set(&qla2x00_dfs_root_count, 0);
 671         qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
 672
 673 create_dir:
 674         if (ha->dfs_dir)
 675                 goto create_nodes;
 676
 677         mutex_init(&ha->fce_mutex);
 678         ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
 679
 680         atomic_inc(&qla2x00_dfs_root_count);
 681
 682 create_nodes:
 683         ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
 684             S_IRUSR, ha->dfs_dir, vha, &qla_dfs_fw_resource_cnt_fops);
 685
 686         ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
 687             ha->dfs_dir, vha, &qla_dfs_tgt_counters_fops);
 688
 689         ha->tgt.dfs_tgt_port_database = debugfs_create_file("tgt_port_database",
 690             S_IRUSR,  ha->dfs_dir, vha, &qla2x00_dfs_tgt_port_database_fops);
 691
 692         ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
 693             &dfs_fce_ops);
 694
 695         ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
 696                 S_IRUSR, ha->dfs_dir, vha, &qla2x00_dfs_tgt_sess_fops);
 697
 698         if (IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha)) {
 699                 ha->tgt.dfs_naqp = debugfs_create_file("naqp",
 700                     0400, ha->dfs_dir, vha, &dfs_naqp_ops);
 701                 if (!ha->tgt.dfs_naqp) {
 702                         ql_log(ql_log_warn, vha, 0xd011,
 703                                "Unable to create debugFS naqp node.\n");
 704                         goto out;
 705                 }
 706         }
 707         vha->dfs_rport_root = debugfs_create_dir("rports", ha->dfs_dir);
 708         if (!vha->dfs_rport_root) {
 709                 ql_log(ql_log_warn, vha, 0xd012,
 710                        "Unable to create debugFS rports node.\n");
 711                 goto out;
 712         }
 713 out:
 714         return 0;
 715 }
 716
 717 int
 718 qla2x00_dfs_remove(scsi_qla_host_t *vha)
 719 {
 720         struct qla_hw_data *ha = vha->hw;
 721
 722         if (ha->tgt.dfs_naqp) {
 723                 debugfs_remove(ha->tgt.dfs_naqp);
 724                 ha->tgt.dfs_naqp = NULL;
 725         }
 726
 727         if (ha->tgt.dfs_tgt_sess) {
 728                 debugfs_remove(ha->tgt.dfs_tgt_sess);
 729                 ha->tgt.dfs_tgt_sess = NULL;
 730         }
 731
 732         if (ha->tgt.dfs_tgt_port_database) {
 733                 debugfs_remove(ha->tgt.dfs_tgt_port_database);
 734                 ha->tgt.dfs_tgt_port_database = NULL;
 735         }
 736
 737         if (ha->dfs_fw_resource_cnt) {
 738                 debugfs_remove(ha->dfs_fw_resource_cnt);
 739                 ha->dfs_fw_resource_cnt = NULL;
 740         }
 741
 742         if (ha->dfs_tgt_counters) {
 743                 debugfs_remove(ha->dfs_tgt_counters);
 744                 ha->dfs_tgt_counters = NULL;
 745         }
 746
 747         if (ha->dfs_fce) {
 748                 debugfs_remove(ha->dfs_fce);
 749                 ha->dfs_fce = NULL;
 750         }
 751
 752         if (vha->dfs_rport_root) {
 753                 debugfs_remove_recursive(vha->dfs_rport_root);
 754                 vha->dfs_rport_root = NULL;
 755         }
 756
 757         if (ha->dfs_dir) {
 758                 debugfs_remove(ha->dfs_dir);
 759                 ha->dfs_dir = NULL;
 760                 atomic_dec(&qla2x00_dfs_root_count);
 761         }
 762
 763         if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
 764             qla2x00_dfs_root) {
 765                 debugfs_remove(qla2x00_dfs_root);
 766                 qla2x00_dfs_root = NULL;
 767         }
 768
 769         return 0;
 770 }