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 (IS_ERR(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                 if (ql2xenforce_iocb_limit == 2) {
 281                         iocbs_used = atomic_read(&ha->fwres.iocb_used);
 282                         exch_used  = atomic_read(&ha->fwres.exch_used);
 283                         seq_printf(s, "        estimate iocb2 used [%d] high water limit [%d]\n",
 284                                         iocbs_used, ha->fwres.iocb_limit);
 285
 286                         seq_printf(s, "        estimate exchange2 used[%d] high water limit [%d] \n",
 287                                         exch_used, ha->fwres.exch_limit);
 288                 }
 289         }
 290
 291         return 0;
 292 }
 293
 294 DEFINE_SHOW_ATTRIBUTE(qla_dfs_fw_resource_cnt);
 295
 296 static int
 297 qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
 298 {
 299         struct scsi_qla_host *vha = s->private;
 300         struct qla_qpair *qpair = vha->hw->base_qpair;
 301         uint64_t qla_core_sbt_cmd, core_qla_que_buf, qla_core_ret_ctio,
 302                 core_qla_snd_status, qla_core_ret_sta_ctio, core_qla_free_cmd,
 303                 num_q_full_sent, num_alloc_iocb_failed, num_term_xchg_sent;
 304         u16 i;
 305         fc_port_t *fcport = NULL;
 306
 307         if (qla2x00_chip_is_down(vha))
 308                 return 0;
 309
 310         qla_core_sbt_cmd = qpair->tgt_counters.qla_core_sbt_cmd;
 311         core_qla_que_buf = qpair->tgt_counters.core_qla_que_buf;
 312         qla_core_ret_ctio = qpair->tgt_counters.qla_core_ret_ctio;
 313         core_qla_snd_status = qpair->tgt_counters.core_qla_snd_status;
 314         qla_core_ret_sta_ctio = qpair->tgt_counters.qla_core_ret_sta_ctio;
 315         core_qla_free_cmd = qpair->tgt_counters.core_qla_free_cmd;
 316         num_q_full_sent = qpair->tgt_counters.num_q_full_sent;
 317         num_alloc_iocb_failed = qpair->tgt_counters.num_alloc_iocb_failed;
 318         num_term_xchg_sent = qpair->tgt_counters.num_term_xchg_sent;
 319
 320         for (i = 0; i < vha->hw->max_qpairs; i++) {
 321                 qpair = vha->hw->queue_pair_map[i];
 322                 if (!qpair)
 323                         continue;
 324                 qla_core_sbt_cmd += qpair->tgt_counters.qla_core_sbt_cmd;
 325                 core_qla_que_buf += qpair->tgt_counters.core_qla_que_buf;
 326                 qla_core_ret_ctio += qpair->tgt_counters.qla_core_ret_ctio;
 327                 core_qla_snd_status += qpair->tgt_counters.core_qla_snd_status;
 328                 qla_core_ret_sta_ctio +=
 329                     qpair->tgt_counters.qla_core_ret_sta_ctio;
 330                 core_qla_free_cmd += qpair->tgt_counters.core_qla_free_cmd;
 331                 num_q_full_sent += qpair->tgt_counters.num_q_full_sent;
 332                 num_alloc_iocb_failed +=
 333                     qpair->tgt_counters.num_alloc_iocb_failed;
 334                 num_term_xchg_sent += qpair->tgt_counters.num_term_xchg_sent;
 335         }
 336
 337         seq_puts(s, "Target Counters\n");
 338         seq_printf(s, "qla_core_sbt_cmd = %lld\n",
 339                 qla_core_sbt_cmd);
 340         seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
 341                 qla_core_ret_sta_ctio);
 342         seq_printf(s, "qla_core_ret_ctio = %lld\n",
 343                 qla_core_ret_ctio);
 344         seq_printf(s, "core_qla_que_buf = %lld\n",
 345                 core_qla_que_buf);
 346         seq_printf(s, "core_qla_snd_status = %lld\n",
 347                 core_qla_snd_status);
 348         seq_printf(s, "core_qla_free_cmd = %lld\n",
 349                 core_qla_free_cmd);
 350         seq_printf(s, "num alloc iocb failed = %lld\n",
 351                 num_alloc_iocb_failed);
 352         seq_printf(s, "num term exchange sent = %lld\n",
 353                 num_term_xchg_sent);
 354         seq_printf(s, "num Q full sent = %lld\n",
 355                 num_q_full_sent);
 356
 357         /* DIF stats */
 358         seq_printf(s, "DIF Inp Bytes = %lld\n",
 359                 vha->qla_stats.qla_dif_stats.dif_input_bytes);
 360         seq_printf(s, "DIF Outp Bytes = %lld\n",
 361                 vha->qla_stats.qla_dif_stats.dif_output_bytes);
 362         seq_printf(s, "DIF Inp Req = %lld\n",
 363                 vha->qla_stats.qla_dif_stats.dif_input_requests);
 364         seq_printf(s, "DIF Outp Req = %lld\n",
 365                 vha->qla_stats.qla_dif_stats.dif_output_requests);
 366         seq_printf(s, "DIF Guard err = %d\n",
 367                 vha->qla_stats.qla_dif_stats.dif_guard_err);
 368         seq_printf(s, "DIF Ref tag err = %d\n",
 369                 vha->qla_stats.qla_dif_stats.dif_ref_tag_err);
 370         seq_printf(s, "DIF App tag err = %d\n",
 371                 vha->qla_stats.qla_dif_stats.dif_app_tag_err);
 372
 373         seq_puts(s, "\n");
 374         seq_puts(s, "Initiator Error Counters\n");
 375         seq_printf(s, "HW Error Count =         %14lld\n",
 376                    vha->hw_err_cnt);
 377         seq_printf(s, "Link Down Count =        %14lld\n",
 378                    vha->short_link_down_cnt);
 379         seq_printf(s, "Interface Err Count =    %14lld\n",
 380                    vha->interface_err_cnt);
 381         seq_printf(s, "Cmd Timeout Count =      %14lld\n",
 382                    vha->cmd_timeout_cnt);
 383         seq_printf(s, "Reset Count =            %14lld\n",
 384                    vha->reset_cmd_err_cnt);
 385         seq_puts(s, "\n");
 386
 387         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 388                 if (!fcport->rport)
 389                         continue;
 390
 391                 seq_printf(s, "Target Num = %7d Link Down Count = %14lld\n",
 392                            fcport->rport->number, fcport->tgt_short_link_down_cnt);
 393         }
 394         seq_puts(s, "\n");
 395
 396         return 0;
 397 }
 398
 399 DEFINE_SHOW_ATTRIBUTE(qla_dfs_tgt_counters);
 400
 401 static int
 402 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
 403 {
 404         scsi_qla_host_t *vha = s->private;
 405         uint32_t cnt;
 406         uint32_t *fce;
 407         uint64_t fce_start;
 408         struct qla_hw_data *ha = vha->hw;
 409
 410         mutex_lock(&ha->fce_mutex);
 411
 412         seq_puts(s, "FCE Trace Buffer\n");
 413         seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
 414         seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
 415         seq_puts(s, "FCE Enable Registers\n");
 416         seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
 417             ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
 418             ha->fce_mb[5], ha->fce_mb[6]);
 419
 420         fce = (uint32_t *) ha->fce;
 421         fce_start = (unsigned long long) ha->fce_dma;
 422         for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
 423                 if (cnt % 8 == 0)
 424                         seq_printf(s, "\n%llx: ",
 425                             (unsigned long long)((cnt * 4) + fce_start));
 426                 else
 427                         seq_putc(s, ' ');
 428                 seq_printf(s, "%08x", *fce++);
 429         }
 430
 431         seq_puts(s, "\nEnd\n");
 432
 433         mutex_unlock(&ha->fce_mutex);
 434
 435         return 0;
 436 }
 437
 438 static int
 439 qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
 440 {
 441         scsi_qla_host_t *vha = inode->i_private;
 442         struct qla_hw_data *ha = vha->hw;
 443         int rval;
 444
 445         if (!ha->flags.fce_enabled)
 446                 goto out;
 447
 448         mutex_lock(&ha->fce_mutex);
 449
 450         /* Pause tracing to flush FCE buffers. */
 451         rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
 452         if (rval)
 453                 ql_dbg(ql_dbg_user, vha, 0x705c,
 454                     "DebugFS: Unable to disable FCE (%d).\n", rval);
 455
 456         ha->flags.fce_enabled = 0;
 457
 458         mutex_unlock(&ha->fce_mutex);
 459 out:
 460         return single_open(file, qla2x00_dfs_fce_show, vha);
 461 }
 462
 463 static int
 464 qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
 465 {
 466         scsi_qla_host_t *vha = inode->i_private;
 467         struct qla_hw_data *ha = vha->hw;
 468         int rval;
 469
 470         if (ha->flags.fce_enabled)
 471                 goto out;
 472
 473         mutex_lock(&ha->fce_mutex);
 474
 475         /* Re-enable FCE tracing. */
 476         ha->flags.fce_enabled = 1;
 477         memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
 478         rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
 479             ha->fce_mb, &ha->fce_bufs);
 480         if (rval) {
 481                 ql_dbg(ql_dbg_user, vha, 0x700d,
 482                     "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
 483                 ha->flags.fce_enabled = 0;
 484         }
 485
 486         mutex_unlock(&ha->fce_mutex);
 487 out:
 488         return single_release(inode, file);
 489 }
 490
 491 static const struct file_operations dfs_fce_ops = {
 492         .open           = qla2x00_dfs_fce_open,
 493         .read           = seq_read,
 494         .llseek         = seq_lseek,
 495         .release        = qla2x00_dfs_fce_release,
 496 };
 497
 498 static int
 499 qla_dfs_naqp_show(struct seq_file *s, void *unused)
 500 {
 501         struct scsi_qla_host *vha = s->private;
 502         struct qla_hw_data *ha = vha->hw;
 503
 504         seq_printf(s, "%d\n", ha->tgt.num_act_qpairs);
 505         return 0;
 506 }
 507
 508 /*
 509  * Helper macros for setting up debugfs entries.
 510  * _name: The name of the debugfs entry
 511  * _ctx_struct: The context that was passed when creating the debugfs file
 512  *
 513  * QLA_DFS_SETUP_RD could be used when there is only a show function.
 514  * - show function take the name qla_dfs_<sysfs-name>_show
 515  *
 516  * QLA_DFS_SETUP_RW could be used when there are both show and write functions.
 517  * - show function take the name  qla_dfs_<sysfs-name>_show
 518  * - write function take the name qla_dfs_<sysfs-name>_write
 519  *
 520  * To have a new debugfs entry, do:
 521  * 1. Create a "struct dentry *" in the appropriate structure in the format
 522  * dfs_<sysfs-name>
 523  * 2. Setup debugfs entries using QLA_DFS_SETUP_RD / QLA_DFS_SETUP_RW
 524  * 3. Create debugfs file in qla2x00_dfs_setup() using QLA_DFS_CREATE_FILE
 525  * or QLA_DFS_ROOT_CREATE_FILE
 526  * 4. Remove debugfs file in qla2x00_dfs_remove() using QLA_DFS_REMOVE_FILE
 527  * or QLA_DFS_ROOT_REMOVE_FILE
 528  *
 529  * Example for creating "TEST" sysfs file:
 530  * 1. struct qla_hw_data { ... struct dentry *dfs_TEST; }
 531  * 2. QLA_DFS_SETUP_RD(TEST);
 532  * 3. In qla2x00_dfs_setup():
 533  * QLA_DFS_CREATE_FILE(ha, TEST, 0600, ha->dfs_dir, vha);
 534  * 4. In qla2x00_dfs_remove():
 535  * QLA_DFS_REMOVE_FILE(ha, TEST);
 536  */
 537 #define QLA_DFS_SETUP_RD(_name) DEFINE_SHOW_ATTRIBUTE(qla_dfs_##_name)
 538
 539 #define QLA_DFS_SETUP_RW(_name) DEFINE_SHOW_STORE_ATTRIBUTE(qla_dfs_##_name)
 540
 541 #define QLA_DFS_ROOT_CREATE_FILE(_name, _perm, _ctx)                    \
 542         do {                                                            \
 543                 if (!qla_dfs_##_name)                                   \
 544                         qla_dfs_##_name = debugfs_create_file(#_name,   \
 545                                         _perm, qla2x00_dfs_root, _ctx,  \
 546                                         &qla_dfs_##_name##_fops);       \
 547         } while (0)
 548
 549 #define QLA_DFS_ROOT_REMOVE_FILE(_name)                                 \
 550         do {                                                            \
 551                 if (qla_dfs_##_name) {                                  \
 552                         debugfs_remove(qla_dfs_##_name);                \
 553                         qla_dfs_##_name = NULL;                         \
 554                 }                                                       \
 555         } while (0)
 556
 557 #define QLA_DFS_CREATE_FILE(_struct, _name, _perm, _parent, _ctx)       \
 558         do {                                                            \
 559                 (_struct)->dfs_##_name = debugfs_create_file(#_name,    \
 560                                         _perm, _parent, _ctx,           \
 561                                         &qla_dfs_##_name##_fops)        \
 562         } while (0)
 563
 564 #define QLA_DFS_REMOVE_FILE(_struct, _name)                             \
 565         do {                                                            \
 566                 if ((_struct)->dfs_##_name) {                           \
 567                         debugfs_remove((_struct)->dfs_##_name);         \
 568                         (_struct)->dfs_##_name = NULL;                  \
 569                 }                                                       \
 570         } while (0)
 571
 572 static ssize_t
 573 qla_dfs_naqp_write(struct file *file, const char __user *buffer,
 574     size_t count, loff_t *pos)
 575 {
 576         struct seq_file *s = file->private_data;
 577         struct scsi_qla_host *vha = s->private;
 578         struct qla_hw_data *ha = vha->hw;
 579         char *buf;
 580         int rc = 0;
 581         unsigned long num_act_qp;
 582
 583         if (!(IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha))) {
 584                 pr_err("host%ld: this adapter does not support Multi Q.",
 585                     vha->host_no);
 586                 return -EINVAL;
 587         }
 588
 589         if (!vha->flags.qpairs_available) {
 590                 pr_err("host%ld: Driver is not setup with Multi Q.",
 591                     vha->host_no);
 592                 return -EINVAL;
 593         }
 594         buf = memdup_user_nul(buffer, count);
 595         if (IS_ERR(buf)) {
 596                 pr_err("host%ld: fail to copy user buffer.",
 597                     vha->host_no);
 598                 return PTR_ERR(buf);
 599         }
 600
 601         num_act_qp = simple_strtoul(buf, NULL, 0);
 602
 603         if (num_act_qp >= vha->hw->max_qpairs) {
 604                 pr_err("User set invalid number of qpairs %lu. Max = %d",
 605                     num_act_qp, vha->hw->max_qpairs);
 606                 rc = -EINVAL;
 607                 goto out_free;
 608         }
 609
 610         if (num_act_qp != ha->tgt.num_act_qpairs) {
 611                 ha->tgt.num_act_qpairs = num_act_qp;
 612                 qlt_clr_qp_table(vha);
 613         }
 614         rc = count;
 615 out_free:
 616         kfree(buf);
 617         return rc;
 618 }
 619 QLA_DFS_SETUP_RW(naqp);
 620
 621 int
 622 qla2x00_dfs_setup(scsi_qla_host_t *vha)
 623 {
 624         struct qla_hw_data *ha = vha->hw;
 625
 626         if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
 627             !IS_QLA27XX(ha) && !IS_QLA28XX(ha))
 628                 goto out;
 629         if (!ha->fce)
 630                 goto out;
 631
 632         if (qla2x00_dfs_root)
 633                 goto create_dir;
 634
 635         atomic_set(&qla2x00_dfs_root_count, 0);
 636         qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
 637
 638 create_dir:
 639         if (ha->dfs_dir)
 640                 goto create_nodes;
 641
 642         mutex_init(&ha->fce_mutex);
 643         ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
 644
 645         atomic_inc(&qla2x00_dfs_root_count);
 646
 647 create_nodes:
 648         ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
 649             S_IRUSR, ha->dfs_dir, vha, &qla_dfs_fw_resource_cnt_fops);
 650
 651         ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
 652             ha->dfs_dir, vha, &qla_dfs_tgt_counters_fops);
 653
 654         ha->tgt.dfs_tgt_port_database = debugfs_create_file("tgt_port_database",
 655             S_IRUSR,  ha->dfs_dir, vha, &qla2x00_dfs_tgt_port_database_fops);
 656
 657         ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
 658             &dfs_fce_ops);
 659
 660         ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
 661                 S_IRUSR, ha->dfs_dir, vha, &qla2x00_dfs_tgt_sess_fops);
 662
 663         if (IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha)) {
 664                 ha->tgt.dfs_naqp = debugfs_create_file("naqp",
 665                     0400, ha->dfs_dir, vha, &qla_dfs_naqp_fops);
 666                 if (IS_ERR(ha->tgt.dfs_naqp)) {
 667                         ql_log(ql_log_warn, vha, 0xd011,
 668                                "Unable to create debugFS naqp node.\n");
 669                         goto out;
 670                 }
 671         }
 672         vha->dfs_rport_root = debugfs_create_dir("rports", ha->dfs_dir);
 673         if (IS_ERR(vha->dfs_rport_root)) {
 674                 ql_log(ql_log_warn, vha, 0xd012,
 675                        "Unable to create debugFS rports node.\n");
 676                 goto out;
 677         }
 678 out:
 679         return 0;
 680 }
 681
 682 int
 683 qla2x00_dfs_remove(scsi_qla_host_t *vha)
 684 {
 685         struct qla_hw_data *ha = vha->hw;
 686
 687         if (ha->tgt.dfs_naqp) {
 688                 debugfs_remove(ha->tgt.dfs_naqp);
 689                 ha->tgt.dfs_naqp = NULL;
 690         }
 691
 692         if (ha->tgt.dfs_tgt_sess) {
 693                 debugfs_remove(ha->tgt.dfs_tgt_sess);
 694                 ha->tgt.dfs_tgt_sess = NULL;
 695         }
 696
 697         if (ha->tgt.dfs_tgt_port_database) {
 698                 debugfs_remove(ha->tgt.dfs_tgt_port_database);
 699                 ha->tgt.dfs_tgt_port_database = NULL;
 700         }
 701
 702         if (ha->dfs_fw_resource_cnt) {
 703                 debugfs_remove(ha->dfs_fw_resource_cnt);
 704                 ha->dfs_fw_resource_cnt = NULL;
 705         }
 706
 707         if (ha->dfs_tgt_counters) {
 708                 debugfs_remove(ha->dfs_tgt_counters);
 709                 ha->dfs_tgt_counters = NULL;
 710         }
 711
 712         if (ha->dfs_fce) {
 713                 debugfs_remove(ha->dfs_fce);
 714                 ha->dfs_fce = NULL;
 715         }
 716
 717         if (vha->dfs_rport_root) {
 718                 debugfs_remove_recursive(vha->dfs_rport_root);
 719                 vha->dfs_rport_root = NULL;
 720         }
 721
 722         if (ha->dfs_dir) {
 723                 debugfs_remove(ha->dfs_dir);
 724                 ha->dfs_dir = NULL;
 725                 atomic_dec(&qla2x00_dfs_root_count);
 726         }
 727
 728         if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
 729             qla2x00_dfs_root) {
 730                 debugfs_remove(qla2x00_dfs_root);
 731                 qla2x00_dfs_root = NULL;
 732         }
 733
 734         return 0;
 735 }