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;
 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                 for (i = 0; i < ha->max_qpairs; i++) {
 267                         if (ha->queue_pair_map[i])
 268                                 iocbs_used += ha->queue_pair_map[i]->fwres.iocbs_used;
 269                 }
 270
 271                 seq_printf(s, "Driver: estimate iocb used [%d] high water limit [%d]\n",
 272                            iocbs_used, ha->base_qpair->fwres.iocbs_limit);
 273         }
 274
 275         return 0;
 276 }
 277
 278 DEFINE_SHOW_ATTRIBUTE(qla_dfs_fw_resource_cnt);
 279
 280 static int
 281 qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
 282 {
 283         struct scsi_qla_host *vha = s->private;
 284         struct qla_qpair *qpair = vha->hw->base_qpair;
 285         uint64_t qla_core_sbt_cmd, core_qla_que_buf, qla_core_ret_ctio,
 286                 core_qla_snd_status, qla_core_ret_sta_ctio, core_qla_free_cmd,
 287                 num_q_full_sent, num_alloc_iocb_failed, num_term_xchg_sent;
 288         u16 i;
 289         fc_port_t *fcport = NULL;
 290
 291         if (qla2x00_chip_is_down(vha))
 292                 return 0;
 293
 294         qla_core_sbt_cmd = qpair->tgt_counters.qla_core_sbt_cmd;
 295         core_qla_que_buf = qpair->tgt_counters.core_qla_que_buf;
 296         qla_core_ret_ctio = qpair->tgt_counters.qla_core_ret_ctio;
 297         core_qla_snd_status = qpair->tgt_counters.core_qla_snd_status;
 298         qla_core_ret_sta_ctio = qpair->tgt_counters.qla_core_ret_sta_ctio;
 299         core_qla_free_cmd = qpair->tgt_counters.core_qla_free_cmd;
 300         num_q_full_sent = qpair->tgt_counters.num_q_full_sent;
 301         num_alloc_iocb_failed = qpair->tgt_counters.num_alloc_iocb_failed;
 302         num_term_xchg_sent = qpair->tgt_counters.num_term_xchg_sent;
 303
 304         for (i = 0; i < vha->hw->max_qpairs; i++) {
 305                 qpair = vha->hw->queue_pair_map[i];
 306                 if (!qpair)
 307                         continue;
 308                 qla_core_sbt_cmd += qpair->tgt_counters.qla_core_sbt_cmd;
 309                 core_qla_que_buf += qpair->tgt_counters.core_qla_que_buf;
 310                 qla_core_ret_ctio += qpair->tgt_counters.qla_core_ret_ctio;
 311                 core_qla_snd_status += qpair->tgt_counters.core_qla_snd_status;
 312                 qla_core_ret_sta_ctio +=
 313                     qpair->tgt_counters.qla_core_ret_sta_ctio;
 314                 core_qla_free_cmd += qpair->tgt_counters.core_qla_free_cmd;
 315                 num_q_full_sent += qpair->tgt_counters.num_q_full_sent;
 316                 num_alloc_iocb_failed +=
 317                     qpair->tgt_counters.num_alloc_iocb_failed;
 318                 num_term_xchg_sent += qpair->tgt_counters.num_term_xchg_sent;
 319         }
 320
 321         seq_puts(s, "Target Counters\n");
 322         seq_printf(s, "qla_core_sbt_cmd = %lld\n",
 323                 qla_core_sbt_cmd);
 324         seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
 325                 qla_core_ret_sta_ctio);
 326         seq_printf(s, "qla_core_ret_ctio = %lld\n",
 327                 qla_core_ret_ctio);
 328         seq_printf(s, "core_qla_que_buf = %lld\n",
 329                 core_qla_que_buf);
 330         seq_printf(s, "core_qla_snd_status = %lld\n",
 331                 core_qla_snd_status);
 332         seq_printf(s, "core_qla_free_cmd = %lld\n",
 333                 core_qla_free_cmd);
 334         seq_printf(s, "num alloc iocb failed = %lld\n",
 335                 num_alloc_iocb_failed);
 336         seq_printf(s, "num term exchange sent = %lld\n",
 337                 num_term_xchg_sent);
 338         seq_printf(s, "num Q full sent = %lld\n",
 339                 num_q_full_sent);
 340
 341         /* DIF stats */
 342         seq_printf(s, "DIF Inp Bytes = %lld\n",
 343                 vha->qla_stats.qla_dif_stats.dif_input_bytes);
 344         seq_printf(s, "DIF Outp Bytes = %lld\n",
 345                 vha->qla_stats.qla_dif_stats.dif_output_bytes);
 346         seq_printf(s, "DIF Inp Req = %lld\n",
 347                 vha->qla_stats.qla_dif_stats.dif_input_requests);
 348         seq_printf(s, "DIF Outp Req = %lld\n",
 349                 vha->qla_stats.qla_dif_stats.dif_output_requests);
 350         seq_printf(s, "DIF Guard err = %d\n",
 351                 vha->qla_stats.qla_dif_stats.dif_guard_err);
 352         seq_printf(s, "DIF Ref tag err = %d\n",
 353                 vha->qla_stats.qla_dif_stats.dif_ref_tag_err);
 354         seq_printf(s, "DIF App tag err = %d\n",
 355                 vha->qla_stats.qla_dif_stats.dif_app_tag_err);
 356
 357         seq_puts(s, "\n");
 358         seq_puts(s, "Initiator Error Counters\n");
 359         seq_printf(s, "HW Error Count =         %14lld\n",
 360                    vha->hw_err_cnt);
 361         seq_printf(s, "Link Down Count =        %14lld\n",
 362                    vha->short_link_down_cnt);
 363         seq_printf(s, "Interface Err Count =    %14lld\n",
 364                    vha->interface_err_cnt);
 365         seq_printf(s, "Cmd Timeout Count =      %14lld\n",
 366                    vha->cmd_timeout_cnt);
 367         seq_printf(s, "Reset Count =            %14lld\n",
 368                    vha->reset_cmd_err_cnt);
 369         seq_puts(s, "\n");
 370
 371         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 372                 if (!fcport->rport)
 373                         continue;
 374
 375                 seq_printf(s, "Target Num = %7d Link Down Count = %14lld\n",
 376                            fcport->rport->number, fcport->tgt_short_link_down_cnt);
 377         }
 378         seq_puts(s, "\n");
 379
 380         return 0;
 381 }
 382
 383 DEFINE_SHOW_ATTRIBUTE(qla_dfs_tgt_counters);
 384
 385 static int
 386 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
 387 {
 388         scsi_qla_host_t *vha = s->private;
 389         uint32_t cnt;
 390         uint32_t *fce;
 391         uint64_t fce_start;
 392         struct qla_hw_data *ha = vha->hw;
 393
 394         mutex_lock(&ha->fce_mutex);
 395
 396         seq_puts(s, "FCE Trace Buffer\n");
 397         seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
 398         seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
 399         seq_puts(s, "FCE Enable Registers\n");
 400         seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
 401             ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
 402             ha->fce_mb[5], ha->fce_mb[6]);
 403
 404         fce = (uint32_t *) ha->fce;
 405         fce_start = (unsigned long long) ha->fce_dma;
 406         for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
 407                 if (cnt % 8 == 0)
 408                         seq_printf(s, "\n%llx: ",
 409                             (unsigned long long)((cnt * 4) + fce_start));
 410                 else
 411                         seq_putc(s, ' ');
 412                 seq_printf(s, "%08x", *fce++);
 413         }
 414
 415         seq_puts(s, "\nEnd\n");
 416
 417         mutex_unlock(&ha->fce_mutex);
 418
 419         return 0;
 420 }
 421
 422 static int
 423 qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
 424 {
 425         scsi_qla_host_t *vha = inode->i_private;
 426         struct qla_hw_data *ha = vha->hw;
 427         int rval;
 428
 429         if (!ha->flags.fce_enabled)
 430                 goto out;
 431
 432         mutex_lock(&ha->fce_mutex);
 433
 434         /* Pause tracing to flush FCE buffers. */
 435         rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
 436         if (rval)
 437                 ql_dbg(ql_dbg_user, vha, 0x705c,
 438                     "DebugFS: Unable to disable FCE (%d).\n", rval);
 439
 440         ha->flags.fce_enabled = 0;
 441
 442         mutex_unlock(&ha->fce_mutex);
 443 out:
 444         return single_open(file, qla2x00_dfs_fce_show, vha);
 445 }
 446
 447 static int
 448 qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
 449 {
 450         scsi_qla_host_t *vha = inode->i_private;
 451         struct qla_hw_data *ha = vha->hw;
 452         int rval;
 453
 454         if (ha->flags.fce_enabled)
 455                 goto out;
 456
 457         mutex_lock(&ha->fce_mutex);
 458
 459         /* Re-enable FCE tracing. */
 460         ha->flags.fce_enabled = 1;
 461         memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
 462         rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
 463             ha->fce_mb, &ha->fce_bufs);
 464         if (rval) {
 465                 ql_dbg(ql_dbg_user, vha, 0x700d,
 466                     "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
 467                 ha->flags.fce_enabled = 0;
 468         }
 469
 470         mutex_unlock(&ha->fce_mutex);
 471 out:
 472         return single_release(inode, file);
 473 }
 474
 475 static const struct file_operations dfs_fce_ops = {
 476         .open           = qla2x00_dfs_fce_open,
 477         .read           = seq_read,
 478         .llseek         = seq_lseek,
 479         .release        = qla2x00_dfs_fce_release,
 480 };
 481
 482 static int
 483 qla_dfs_naqp_show(struct seq_file *s, void *unused)
 484 {
 485         struct scsi_qla_host *vha = s->private;
 486         struct qla_hw_data *ha = vha->hw;
 487
 488         seq_printf(s, "%d\n", ha->tgt.num_act_qpairs);
 489         return 0;
 490 }
 491
 492 static int
 493 qla_dfs_naqp_open(struct inode *inode, struct file *file)
 494 {
 495         struct scsi_qla_host *vha = inode->i_private;
 496
 497         return single_open(file, qla_dfs_naqp_show, vha);
 498 }
 499
 500 static ssize_t
 501 qla_dfs_naqp_write(struct file *file, const char __user *buffer,
 502     size_t count, loff_t *pos)
 503 {
 504         struct seq_file *s = file->private_data;
 505         struct scsi_qla_host *vha = s->private;
 506         struct qla_hw_data *ha = vha->hw;
 507         char *buf;
 508         int rc = 0;
 509         unsigned long num_act_qp;
 510
 511         if (!(IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha))) {
 512                 pr_err("host%ld: this adapter does not support Multi Q.",
 513                     vha->host_no);
 514                 return -EINVAL;
 515         }
 516
 517         if (!vha->flags.qpairs_available) {
 518                 pr_err("host%ld: Driver is not setup with Multi Q.",
 519                     vha->host_no);
 520                 return -EINVAL;
 521         }
 522         buf = memdup_user_nul(buffer, count);
 523         if (IS_ERR(buf)) {
 524                 pr_err("host%ld: fail to copy user buffer.",
 525                     vha->host_no);
 526                 return PTR_ERR(buf);
 527         }
 528
 529         num_act_qp = simple_strtoul(buf, NULL, 0);
 530
 531         if (num_act_qp >= vha->hw->max_qpairs) {
 532                 pr_err("User set invalid number of qpairs %lu. Max = %d",
 533                     num_act_qp, vha->hw->max_qpairs);
 534                 rc = -EINVAL;
 535                 goto out_free;
 536         }
 537
 538         if (num_act_qp != ha->tgt.num_act_qpairs) {
 539                 ha->tgt.num_act_qpairs = num_act_qp;
 540                 qlt_clr_qp_table(vha);
 541         }
 542         rc = count;
 543 out_free:
 544         kfree(buf);
 545         return rc;
 546 }
 547
 548 static const struct file_operations dfs_naqp_ops = {
 549         .open           = qla_dfs_naqp_open,
 550         .read           = seq_read,
 551         .llseek         = seq_lseek,
 552         .release        = single_release,
 553         .write          = qla_dfs_naqp_write,
 554 };
 555
 556
 557 int
 558 qla2x00_dfs_setup(scsi_qla_host_t *vha)
 559 {
 560         struct qla_hw_data *ha = vha->hw;
 561
 562         if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
 563             !IS_QLA27XX(ha) && !IS_QLA28XX(ha))
 564                 goto out;
 565         if (!ha->fce)
 566                 goto out;
 567
 568         if (qla2x00_dfs_root)
 569                 goto create_dir;
 570
 571         atomic_set(&qla2x00_dfs_root_count, 0);
 572         qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
 573
 574 create_dir:
 575         if (ha->dfs_dir)
 576                 goto create_nodes;
 577
 578         mutex_init(&ha->fce_mutex);
 579         ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
 580
 581         atomic_inc(&qla2x00_dfs_root_count);
 582
 583 create_nodes:
 584         ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
 585             S_IRUSR, ha->dfs_dir, vha, &qla_dfs_fw_resource_cnt_fops);
 586
 587         ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
 588             ha->dfs_dir, vha, &qla_dfs_tgt_counters_fops);
 589
 590         ha->tgt.dfs_tgt_port_database = debugfs_create_file("tgt_port_database",
 591             S_IRUSR,  ha->dfs_dir, vha, &qla2x00_dfs_tgt_port_database_fops);
 592
 593         ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
 594             &dfs_fce_ops);
 595
 596         ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
 597                 S_IRUSR, ha->dfs_dir, vha, &qla2x00_dfs_tgt_sess_fops);
 598
 599         if (IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha)) {
 600                 ha->tgt.dfs_naqp = debugfs_create_file("naqp",
 601                     0400, ha->dfs_dir, vha, &dfs_naqp_ops);
 602                 if (!ha->tgt.dfs_naqp) {
 603                         ql_log(ql_log_warn, vha, 0xd011,
 604                                "Unable to create debugFS naqp node.\n");
 605                         goto out;
 606                 }
 607         }
 608         vha->dfs_rport_root = debugfs_create_dir("rports", ha->dfs_dir);
 609         if (!vha->dfs_rport_root) {
 610                 ql_log(ql_log_warn, vha, 0xd012,
 611                        "Unable to create debugFS rports node.\n");
 612                 goto out;
 613         }
 614 out:
 615         return 0;
 616 }
 617
 618 int
 619 qla2x00_dfs_remove(scsi_qla_host_t *vha)
 620 {
 621         struct qla_hw_data *ha = vha->hw;
 622
 623         if (ha->tgt.dfs_naqp) {
 624                 debugfs_remove(ha->tgt.dfs_naqp);
 625                 ha->tgt.dfs_naqp = NULL;
 626         }
 627
 628         if (ha->tgt.dfs_tgt_sess) {
 629                 debugfs_remove(ha->tgt.dfs_tgt_sess);
 630                 ha->tgt.dfs_tgt_sess = NULL;
 631         }
 632
 633         if (ha->tgt.dfs_tgt_port_database) {
 634                 debugfs_remove(ha->tgt.dfs_tgt_port_database);
 635                 ha->tgt.dfs_tgt_port_database = NULL;
 636         }
 637
 638         if (ha->dfs_fw_resource_cnt) {
 639                 debugfs_remove(ha->dfs_fw_resource_cnt);
 640                 ha->dfs_fw_resource_cnt = NULL;
 641         }
 642
 643         if (ha->dfs_tgt_counters) {
 644                 debugfs_remove(ha->dfs_tgt_counters);
 645                 ha->dfs_tgt_counters = NULL;
 646         }
 647
 648         if (ha->dfs_fce) {
 649                 debugfs_remove(ha->dfs_fce);
 650                 ha->dfs_fce = NULL;
 651         }
 652
 653         if (vha->dfs_rport_root) {
 654                 debugfs_remove_recursive(vha->dfs_rport_root);
 655                 vha->dfs_rport_root = NULL;
 656         }
 657
 658         if (ha->dfs_dir) {
 659                 debugfs_remove(ha->dfs_dir);
 660                 ha->dfs_dir = NULL;
 661                 atomic_dec(&qla2x00_dfs_root_count);
 662         }
 663
 664         if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
 665             qla2x00_dfs_root) {
 666                 debugfs_remove(qla2x00_dfs_root);
 667                 qla2x00_dfs_root = NULL;
 668         }
 669
 670         return 0;
 671 }