drivers/scsi/qla2xxx/qla_dfs.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2014 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <linux/debugfs.h>
  10 #include <linux/seq_file.h>
  11
  12 static struct dentry *qla2x00_dfs_root;
  13 static atomic_t qla2x00_dfs_root_count;
  14
  15 #define QLA_DFS_RPORT_DEVLOSS_TMO       1
  16
  17 static int
  18 qla_dfs_rport_get(struct fc_port *fp, int attr_id, u64 *val)
  19 {
  20         switch (attr_id) {
  21         case QLA_DFS_RPORT_DEVLOSS_TMO:
  22                 /* Only supported for FC-NVMe devices that are registered. */
  23                 if (!(fp->nvme_flag & NVME_FLAG_REGISTERED))
  24                         return -EIO;
  25                 *val = fp->nvme_remote_port->dev_loss_tmo;
  26                 break;
  27         default:
  28                 return -EINVAL;
  29         }
  30         return 0;
  31 }
  32
  33 static int
  34 qla_dfs_rport_set(struct fc_port *fp, int attr_id, u64 val)
  35 {
  36         switch (attr_id) {
  37         case QLA_DFS_RPORT_DEVLOSS_TMO:
  38                 /* Only supported for FC-NVMe devices that are registered. */
  39                 if (!(fp->nvme_flag & NVME_FLAG_REGISTERED))
  40                         return -EIO;
  41 #if (IS_ENABLED(CONFIG_NVME_FC))
  42                 return nvme_fc_set_remoteport_devloss(fp->nvme_remote_port,
  43                                                       val);
  44 #else /* CONFIG_NVME_FC */
  45                 return -EINVAL;
  46 #endif /* CONFIG_NVME_FC */
  47         default:
  48                 return -EINVAL;
  49         }
  50         return 0;
  51 }
  52
  53 #define DEFINE_QLA_DFS_RPORT_RW_ATTR(_attr_id, _attr)           \
  54 static int qla_dfs_rport_##_attr##_get(void *data, u64 *val)    \
  55 {                                                               \
  56         struct fc_port *fp = data;                              \
  57         return qla_dfs_rport_get(fp, _attr_id, val);            \
  58 }                                                               \
  59 static int qla_dfs_rport_##_attr##_set(void *data, u64 val)     \
  60 {                                                               \
  61         struct fc_port *fp = data;                              \
  62         return qla_dfs_rport_set(fp, _attr_id, val);            \
  63 }                                                               \
  64 DEFINE_DEBUGFS_ATTRIBUTE(qla_dfs_rport_##_attr##_fops,          \
  65                 qla_dfs_rport_##_attr##_get,                    \
  66                 qla_dfs_rport_##_attr##_set, "%llu\n")
  67
  68 /*
  69  * Wrapper for getting fc_port fields.
  70  *
  71  * _attr    : Attribute name.
  72  * _get_val : Accessor macro to retrieve the value.
  73  */
  74 #define DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, _get_val)                 \
  75 static int qla_dfs_rport_field_##_attr##_get(void *data, u64 *val)      \
  76 {                                                                       \
  77         struct fc_port *fp = data;                                      \
  78         *val = _get_val;                                                \
  79         return 0;                                                       \
  80 }                                                                       \
  81 DEFINE_DEBUGFS_ATTRIBUTE(qla_dfs_rport_field_##_attr##_fops,            \
  82                 qla_dfs_rport_field_##_attr##_get,                      \
  83                 NULL, "%llu\n")
  84
  85 #define DEFINE_QLA_DFS_RPORT_ACCESS(_attr, _get_val) \
  86         DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, _get_val)
  87
  88 #define DEFINE_QLA_DFS_RPORT_FIELD(_attr) \
  89         DEFINE_QLA_DFS_RPORT_FIELD_GET(_attr, fp->_attr)
  90
  91 DEFINE_QLA_DFS_RPORT_RW_ATTR(QLA_DFS_RPORT_DEVLOSS_TMO, dev_loss_tmo);
  92
  93 DEFINE_QLA_DFS_RPORT_FIELD(disc_state);
  94 DEFINE_QLA_DFS_RPORT_FIELD(scan_state);
  95 DEFINE_QLA_DFS_RPORT_FIELD(fw_login_state);
  96 DEFINE_QLA_DFS_RPORT_FIELD(login_pause);
  97 DEFINE_QLA_DFS_RPORT_FIELD(flags);
  98 DEFINE_QLA_DFS_RPORT_FIELD(nvme_flag);
  99 DEFINE_QLA_DFS_RPORT_FIELD(last_rscn_gen);
 100 DEFINE_QLA_DFS_RPORT_FIELD(rscn_gen);
 101 DEFINE_QLA_DFS_RPORT_FIELD(login_gen);
 102 DEFINE_QLA_DFS_RPORT_FIELD(loop_id);
 103 DEFINE_QLA_DFS_RPORT_FIELD_GET(port_id, fp->d_id.b24);
 104 DEFINE_QLA_DFS_RPORT_FIELD_GET(sess_kref, kref_read(&fp->sess_kref));
 105
 106 void
 107 qla2x00_dfs_create_rport(scsi_qla_host_t *vha, struct fc_port *fp)
 108 {
 109         char wwn[32];
 110
 111 #define QLA_CREATE_RPORT_FIELD_ATTR(_attr)                      \
 112         debugfs_create_file(#_attr, 0400, fp->dfs_rport_dir,    \
 113                 fp, &qla_dfs_rport_field_##_attr##_fops)
 114
 115         if (!vha->dfs_rport_root || fp->dfs_rport_dir)
 116                 return;
 117
 118         sprintf(wwn, "pn-%016llx", wwn_to_u64(fp->port_name));
 119         fp->dfs_rport_dir = debugfs_create_dir(wwn, vha->dfs_rport_root);
 120         if (!fp->dfs_rport_dir)
 121                 return;
 122         if (NVME_TARGET(vha->hw, fp))
 123                 debugfs_create_file("dev_loss_tmo", 0600, fp->dfs_rport_dir,
 124                                     fp, &qla_dfs_rport_dev_loss_tmo_fops);
 125
 126         QLA_CREATE_RPORT_FIELD_ATTR(disc_state);
 127         QLA_CREATE_RPORT_FIELD_ATTR(scan_state);
 128         QLA_CREATE_RPORT_FIELD_ATTR(fw_login_state);
 129         QLA_CREATE_RPORT_FIELD_ATTR(login_pause);
 130         QLA_CREATE_RPORT_FIELD_ATTR(flags);
 131         QLA_CREATE_RPORT_FIELD_ATTR(nvme_flag);
 132         QLA_CREATE_RPORT_FIELD_ATTR(last_rscn_gen);
 133         QLA_CREATE_RPORT_FIELD_ATTR(rscn_gen);
 134         QLA_CREATE_RPORT_FIELD_ATTR(login_gen);
 135         QLA_CREATE_RPORT_FIELD_ATTR(loop_id);
 136         QLA_CREATE_RPORT_FIELD_ATTR(port_id);
 137         QLA_CREATE_RPORT_FIELD_ATTR(sess_kref);
 138 }
 139
 140 void
 141 qla2x00_dfs_remove_rport(scsi_qla_host_t *vha, struct fc_port *fp)
 142 {
 143         if (!vha->dfs_rport_root || !fp->dfs_rport_dir)
 144                 return;
 145         debugfs_remove_recursive(fp->dfs_rport_dir);
 146         fp->dfs_rport_dir = NULL;
 147 }
 148
 149 static int
 150 qla2x00_dfs_tgt_sess_show(struct seq_file *s, void *unused)
 151 {
 152         scsi_qla_host_t *vha = s->private;
 153         struct qla_hw_data *ha = vha->hw;
 154         unsigned long flags;
 155         struct fc_port *sess = NULL;
 156         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 157
 158         seq_printf(s, "%s\n", vha->host_str);
 159         if (tgt) {
 160                 seq_puts(s, "Port ID   Port Name                Handle\n");
 161
 162                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 163                 list_for_each_entry(sess, &vha->vp_fcports, list)
 164                         seq_printf(s, "%02x:%02x:%02x  %8phC  %d\n",
 165                             sess->d_id.b.domain, sess->d_id.b.area,
 166                             sess->d_id.b.al_pa, sess->port_name,
 167                             sess->loop_id);
 168                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 169         }
 170
 171         return 0;
 172 }
 173
 174 static int
 175 qla2x00_dfs_tgt_sess_open(struct inode *inode, struct file *file)
 176 {
 177         scsi_qla_host_t *vha = inode->i_private;
 178
 179         return single_open(file, qla2x00_dfs_tgt_sess_show, vha);
 180 }
 181
 182 static const struct file_operations dfs_tgt_sess_ops = {
 183         .open           = qla2x00_dfs_tgt_sess_open,
 184         .read           = seq_read,
 185         .llseek         = seq_lseek,
 186         .release        = single_release,
 187 };
 188
 189 static int
 190 qla2x00_dfs_tgt_port_database_show(struct seq_file *s, void *unused)
 191 {
 192         scsi_qla_host_t *vha = s->private;
 193         struct qla_hw_data *ha = vha->hw;
 194         struct gid_list_info *gid_list;
 195         dma_addr_t gid_list_dma;
 196         fc_port_t fc_port;
 197         char *id_iter;
 198         int rc, i;
 199         uint16_t entries, loop_id;
 200
 201         seq_printf(s, "%s\n", vha->host_str);
 202         gid_list = dma_alloc_coherent(&ha->pdev->dev,
 203                                       qla2x00_gid_list_size(ha),
 204                                       &gid_list_dma, GFP_KERNEL);
 205         if (!gid_list) {
 206                 ql_dbg(ql_dbg_user, vha, 0x7018,
 207                        "DMA allocation failed for %u\n",
 208                        qla2x00_gid_list_size(ha));
 209                 return 0;
 210         }
 211
 212         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma,
 213                                   &entries);
 214         if (rc != QLA_SUCCESS)
 215                 goto out_free_id_list;
 216
 217         id_iter = (char *)gid_list;
 218
 219         seq_puts(s, "Port Name  Port ID         Loop ID\n");
 220
 221         for (i = 0; i < entries; i++) {
 222                 struct gid_list_info *gid =
 223                         (struct gid_list_info *)id_iter;
 224                 loop_id = le16_to_cpu(gid->loop_id);
 225                 memset(&fc_port, 0, sizeof(fc_port_t));
 226
 227                 fc_port.loop_id = loop_id;
 228
 229                 rc = qla24xx_gpdb_wait(vha, &fc_port, 0);
 230                 seq_printf(s, "%8phC  %02x%02x%02x  %d\n",
 231                            fc_port.port_name, fc_port.d_id.b.domain,
 232                            fc_port.d_id.b.area, fc_port.d_id.b.al_pa,
 233                            fc_port.loop_id);
 234                 id_iter += ha->gid_list_info_size;
 235         }
 236 out_free_id_list:
 237         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 238                           gid_list, gid_list_dma);
 239
 240         return 0;
 241 }
 242
 243 static int
 244 qla2x00_dfs_tgt_port_database_open(struct inode *inode, struct file *file)
 245 {
 246         scsi_qla_host_t *vha = inode->i_private;
 247
 248         return single_open(file, qla2x00_dfs_tgt_port_database_show, vha);
 249 }
 250
 251 static const struct file_operations dfs_tgt_port_database_ops = {
 252         .open           = qla2x00_dfs_tgt_port_database_open,
 253         .read           = seq_read,
 254         .llseek         = seq_lseek,
 255         .release        = single_release,
 256 };
 257
 258 static int
 259 qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
 260 {
 261         struct scsi_qla_host *vha = s->private;
 262         uint16_t mb[MAX_IOCB_MB_REG];
 263         int rc;
 264
 265         rc = qla24xx_res_count_wait(vha, mb, SIZEOF_IOCB_MB_REG);
 266         if (rc != QLA_SUCCESS) {
 267                 seq_printf(s, "Mailbox Command failed %d, mb %#x", rc, mb[0]);
 268         } else {
 269                 seq_puts(s, "FW Resource count\n\n");
 270                 seq_printf(s, "Original TGT exchg count[%d]\n", mb[1]);
 271                 seq_printf(s, "Current TGT exchg count[%d]\n", mb[2]);
 272                 seq_printf(s, "Current Initiator Exchange count[%d]\n", mb[3]);
 273                 seq_printf(s, "Original Initiator Exchange count[%d]\n", mb[6]);
 274                 seq_printf(s, "Current IOCB count[%d]\n", mb[7]);
 275                 seq_printf(s, "Original IOCB count[%d]\n", mb[10]);
 276                 seq_printf(s, "MAX VP count[%d]\n", mb[11]);
 277                 seq_printf(s, "MAX FCF count[%d]\n", mb[12]);
 278                 seq_printf(s, "Current free pageable XCB buffer cnt[%d]\n",
 279                     mb[20]);
 280                 seq_printf(s, "Original Initiator fast XCB buffer cnt[%d]\n",
 281                     mb[21]);
 282                 seq_printf(s, "Current free Initiator fast XCB buffer cnt[%d]\n",
 283                     mb[22]);
 284                 seq_printf(s, "Original Target fast XCB buffer cnt[%d]\n",
 285                     mb[23]);
 286         }
 287
 288         return 0;
 289 }
 290
 291 static int
 292 qla_dfs_fw_resource_cnt_open(struct inode *inode, struct file *file)
 293 {
 294         struct scsi_qla_host *vha = inode->i_private;
 295
 296         return single_open(file, qla_dfs_fw_resource_cnt_show, vha);
 297 }
 298
 299 static const struct file_operations dfs_fw_resource_cnt_ops = {
 300         .open           = qla_dfs_fw_resource_cnt_open,
 301         .read           = seq_read,
 302         .llseek         = seq_lseek,
 303         .release        = single_release,
 304 };
 305
 306 static int
 307 qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
 308 {
 309         struct scsi_qla_host *vha = s->private;
 310         struct qla_qpair *qpair = vha->hw->base_qpair;
 311         uint64_t qla_core_sbt_cmd, core_qla_que_buf, qla_core_ret_ctio,
 312                 core_qla_snd_status, qla_core_ret_sta_ctio, core_qla_free_cmd,
 313                 num_q_full_sent, num_alloc_iocb_failed, num_term_xchg_sent;
 314         u16 i;
 315
 316         qla_core_sbt_cmd = qpair->tgt_counters.qla_core_sbt_cmd;
 317         core_qla_que_buf = qpair->tgt_counters.core_qla_que_buf;
 318         qla_core_ret_ctio = qpair->tgt_counters.qla_core_ret_ctio;
 319         core_qla_snd_status = qpair->tgt_counters.core_qla_snd_status;
 320         qla_core_ret_sta_ctio = qpair->tgt_counters.qla_core_ret_sta_ctio;
 321         core_qla_free_cmd = qpair->tgt_counters.core_qla_free_cmd;
 322         num_q_full_sent = qpair->tgt_counters.num_q_full_sent;
 323         num_alloc_iocb_failed = qpair->tgt_counters.num_alloc_iocb_failed;
 324         num_term_xchg_sent = qpair->tgt_counters.num_term_xchg_sent;
 325
 326         for (i = 0; i < vha->hw->max_qpairs; i++) {
 327                 qpair = vha->hw->queue_pair_map[i];
 328                 if (!qpair)
 329                         continue;
 330                 qla_core_sbt_cmd += qpair->tgt_counters.qla_core_sbt_cmd;
 331                 core_qla_que_buf += qpair->tgt_counters.core_qla_que_buf;
 332                 qla_core_ret_ctio += qpair->tgt_counters.qla_core_ret_ctio;
 333                 core_qla_snd_status += qpair->tgt_counters.core_qla_snd_status;
 334                 qla_core_ret_sta_ctio +=
 335                     qpair->tgt_counters.qla_core_ret_sta_ctio;
 336                 core_qla_free_cmd += qpair->tgt_counters.core_qla_free_cmd;
 337                 num_q_full_sent += qpair->tgt_counters.num_q_full_sent;
 338                 num_alloc_iocb_failed +=
 339                     qpair->tgt_counters.num_alloc_iocb_failed;
 340                 num_term_xchg_sent += qpair->tgt_counters.num_term_xchg_sent;
 341         }
 342
 343         seq_puts(s, "Target Counters\n");
 344         seq_printf(s, "qla_core_sbt_cmd = %lld\n",
 345                 qla_core_sbt_cmd);
 346         seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
 347                 qla_core_ret_sta_ctio);
 348         seq_printf(s, "qla_core_ret_ctio = %lld\n",
 349                 qla_core_ret_ctio);
 350         seq_printf(s, "core_qla_que_buf = %lld\n",
 351                 core_qla_que_buf);
 352         seq_printf(s, "core_qla_snd_status = %lld\n",
 353                 core_qla_snd_status);
 354         seq_printf(s, "core_qla_free_cmd = %lld\n",
 355                 core_qla_free_cmd);
 356         seq_printf(s, "num alloc iocb failed = %lld\n",
 357                 num_alloc_iocb_failed);
 358         seq_printf(s, "num term exchange sent = %lld\n",
 359                 num_term_xchg_sent);
 360         seq_printf(s, "num Q full sent = %lld\n",
 361                 num_q_full_sent);
 362
 363         /* DIF stats */
 364         seq_printf(s, "DIF Inp Bytes = %lld\n",
 365                 vha->qla_stats.qla_dif_stats.dif_input_bytes);
 366         seq_printf(s, "DIF Outp Bytes = %lld\n",
 367                 vha->qla_stats.qla_dif_stats.dif_output_bytes);
 368         seq_printf(s, "DIF Inp Req = %lld\n",
 369                 vha->qla_stats.qla_dif_stats.dif_input_requests);
 370         seq_printf(s, "DIF Outp Req = %lld\n",
 371                 vha->qla_stats.qla_dif_stats.dif_output_requests);
 372         seq_printf(s, "DIF Guard err = %d\n",
 373                 vha->qla_stats.qla_dif_stats.dif_guard_err);
 374         seq_printf(s, "DIF Ref tag err = %d\n",
 375                 vha->qla_stats.qla_dif_stats.dif_ref_tag_err);
 376         seq_printf(s, "DIF App tag err = %d\n",
 377                 vha->qla_stats.qla_dif_stats.dif_app_tag_err);
 378         return 0;
 379 }
 380
 381 static int
 382 qla_dfs_tgt_counters_open(struct inode *inode, struct file *file)
 383 {
 384         struct scsi_qla_host *vha = inode->i_private;
 385
 386         return single_open(file, qla_dfs_tgt_counters_show, vha);
 387 }
 388
 389 static const struct file_operations dfs_tgt_counters_ops = {
 390         .open           = qla_dfs_tgt_counters_open,
 391         .read           = seq_read,
 392         .llseek         = seq_lseek,
 393         .release        = single_release,
 394 };
 395
 396 static int
 397 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
 398 {
 399         scsi_qla_host_t *vha = s->private;
 400         uint32_t cnt;
 401         uint32_t *fce;
 402         uint64_t fce_start;
 403         struct qla_hw_data *ha = vha->hw;
 404
 405         mutex_lock(&ha->fce_mutex);
 406
 407         seq_puts(s, "FCE Trace Buffer\n");
 408         seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
 409         seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
 410         seq_puts(s, "FCE Enable Registers\n");
 411         seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
 412             ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
 413             ha->fce_mb[5], ha->fce_mb[6]);
 414
 415         fce = (uint32_t *) ha->fce;
 416         fce_start = (unsigned long long) ha->fce_dma;
 417         for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
 418                 if (cnt % 8 == 0)
 419                         seq_printf(s, "\n%llx: ",
 420                             (unsigned long long)((cnt * 4) + fce_start));
 421                 else
 422                         seq_putc(s, ' ');
 423                 seq_printf(s, "%08x", *fce++);
 424         }
 425
 426         seq_puts(s, "\nEnd\n");
 427
 428         mutex_unlock(&ha->fce_mutex);
 429
 430         return 0;
 431 }
 432
 433 static int
 434 qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
 435 {
 436         scsi_qla_host_t *vha = inode->i_private;
 437         struct qla_hw_data *ha = vha->hw;
 438         int rval;
 439
 440         if (!ha->flags.fce_enabled)
 441                 goto out;
 442
 443         mutex_lock(&ha->fce_mutex);
 444
 445         /* Pause tracing to flush FCE buffers. */
 446         rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
 447         if (rval)
 448                 ql_dbg(ql_dbg_user, vha, 0x705c,
 449                     "DebugFS: Unable to disable FCE (%d).\n", rval);
 450
 451         ha->flags.fce_enabled = 0;
 452
 453         mutex_unlock(&ha->fce_mutex);
 454 out:
 455         return single_open(file, qla2x00_dfs_fce_show, vha);
 456 }
 457
 458 static int
 459 qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
 460 {
 461         scsi_qla_host_t *vha = inode->i_private;
 462         struct qla_hw_data *ha = vha->hw;
 463         int rval;
 464
 465         if (ha->flags.fce_enabled)
 466                 goto out;
 467
 468         mutex_lock(&ha->fce_mutex);
 469
 470         /* Re-enable FCE tracing. */
 471         ha->flags.fce_enabled = 1;
 472         memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
 473         rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
 474             ha->fce_mb, &ha->fce_bufs);
 475         if (rval) {
 476                 ql_dbg(ql_dbg_user, vha, 0x700d,
 477                     "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
 478                 ha->flags.fce_enabled = 0;
 479         }
 480
 481         mutex_unlock(&ha->fce_mutex);
 482 out:
 483         return single_release(inode, file);
 484 }
 485
 486 static const struct file_operations dfs_fce_ops = {
 487         .open           = qla2x00_dfs_fce_open,
 488         .read           = seq_read,
 489         .llseek         = seq_lseek,
 490         .release        = qla2x00_dfs_fce_release,
 491 };
 492
 493 static int
 494 qla_dfs_naqp_show(struct seq_file *s, void *unused)
 495 {
 496         struct scsi_qla_host *vha = s->private;
 497         struct qla_hw_data *ha = vha->hw;
 498
 499         seq_printf(s, "%d\n", ha->tgt.num_act_qpairs);
 500         return 0;
 501 }
 502
 503 static int
 504 qla_dfs_naqp_open(struct inode *inode, struct file *file)
 505 {
 506         struct scsi_qla_host *vha = inode->i_private;
 507
 508         return single_open(file, qla_dfs_naqp_show, vha);
 509 }
 510
 511 static ssize_t
 512 qla_dfs_naqp_write(struct file *file, const char __user *buffer,
 513     size_t count, loff_t *pos)
 514 {
 515         struct seq_file *s = file->private_data;
 516         struct scsi_qla_host *vha = s->private;
 517         struct qla_hw_data *ha = vha->hw;
 518         char *buf;
 519         int rc = 0;
 520         unsigned long num_act_qp;
 521
 522         if (!(IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha))) {
 523                 pr_err("host%ld: this adapter does not support Multi Q.",
 524                     vha->host_no);
 525                 return -EINVAL;
 526         }
 527
 528         if (!vha->flags.qpairs_available) {
 529                 pr_err("host%ld: Driver is not setup with Multi Q.",
 530                     vha->host_no);
 531                 return -EINVAL;
 532         }
 533         buf = memdup_user_nul(buffer, count);
 534         if (IS_ERR(buf)) {
 535                 pr_err("host%ld: fail to copy user buffer.",
 536                     vha->host_no);
 537                 return PTR_ERR(buf);
 538         }
 539
 540         num_act_qp = simple_strtoul(buf, NULL, 0);
 541
 542         if (num_act_qp >= vha->hw->max_qpairs) {
 543                 pr_err("User set invalid number of qpairs %lu. Max = %d",
 544                     num_act_qp, vha->hw->max_qpairs);
 545                 rc = -EINVAL;
 546                 goto out_free;
 547         }
 548
 549         if (num_act_qp != ha->tgt.num_act_qpairs) {
 550                 ha->tgt.num_act_qpairs = num_act_qp;
 551                 qlt_clr_qp_table(vha);
 552         }
 553         rc = count;
 554 out_free:
 555         kfree(buf);
 556         return rc;
 557 }
 558
 559 static const struct file_operations dfs_naqp_ops = {
 560         .open           = qla_dfs_naqp_open,
 561         .read           = seq_read,
 562         .llseek         = seq_lseek,
 563         .release        = single_release,
 564         .write          = qla_dfs_naqp_write,
 565 };
 566
 567
 568 int
 569 qla2x00_dfs_setup(scsi_qla_host_t *vha)
 570 {
 571         struct qla_hw_data *ha = vha->hw;
 572
 573         if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
 574             !IS_QLA27XX(ha) && !IS_QLA28XX(ha))
 575                 goto out;
 576         if (!ha->fce)
 577                 goto out;
 578
 579         if (qla2x00_dfs_root)
 580                 goto create_dir;
 581
 582         atomic_set(&qla2x00_dfs_root_count, 0);
 583         qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
 584
 585 create_dir:
 586         if (ha->dfs_dir)
 587                 goto create_nodes;
 588
 589         mutex_init(&ha->fce_mutex);
 590         ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
 591
 592         atomic_inc(&qla2x00_dfs_root_count);
 593
 594 create_nodes:
 595         ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
 596             S_IRUSR, ha->dfs_dir, vha, &dfs_fw_resource_cnt_ops);
 597
 598         ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
 599             ha->dfs_dir, vha, &dfs_tgt_counters_ops);
 600
 601         ha->tgt.dfs_tgt_port_database = debugfs_create_file("tgt_port_database",
 602             S_IRUSR,  ha->dfs_dir, vha, &dfs_tgt_port_database_ops);
 603
 604         ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
 605             &dfs_fce_ops);
 606
 607         ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
 608                 S_IRUSR, ha->dfs_dir, vha, &dfs_tgt_sess_ops);
 609
 610         if (IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha)) {
 611                 ha->tgt.dfs_naqp = debugfs_create_file("naqp",
 612                     0400, ha->dfs_dir, vha, &dfs_naqp_ops);
 613                 if (!ha->tgt.dfs_naqp) {
 614                         ql_log(ql_log_warn, vha, 0xd011,
 615                                "Unable to create debugFS naqp node.\n");
 616                         goto out;
 617                 }
 618         }
 619         vha->dfs_rport_root = debugfs_create_dir("rports", ha->dfs_dir);
 620         if (!vha->dfs_rport_root) {
 621                 ql_log(ql_log_warn, vha, 0xd012,
 622                        "Unable to create debugFS rports node.\n");
 623                 goto out;
 624         }
 625 out:
 626         return 0;
 627 }
 628
 629 int
 630 qla2x00_dfs_remove(scsi_qla_host_t *vha)
 631 {
 632         struct qla_hw_data *ha = vha->hw;
 633
 634         if (ha->tgt.dfs_naqp) {
 635                 debugfs_remove(ha->tgt.dfs_naqp);
 636                 ha->tgt.dfs_naqp = NULL;
 637         }
 638
 639         if (ha->tgt.dfs_tgt_sess) {
 640                 debugfs_remove(ha->tgt.dfs_tgt_sess);
 641                 ha->tgt.dfs_tgt_sess = NULL;
 642         }
 643
 644         if (ha->tgt.dfs_tgt_port_database) {
 645                 debugfs_remove(ha->tgt.dfs_tgt_port_database);
 646                 ha->tgt.dfs_tgt_port_database = NULL;
 647         }
 648
 649         if (ha->dfs_fw_resource_cnt) {
 650                 debugfs_remove(ha->dfs_fw_resource_cnt);
 651                 ha->dfs_fw_resource_cnt = NULL;
 652         }
 653
 654         if (ha->dfs_tgt_counters) {
 655                 debugfs_remove(ha->dfs_tgt_counters);
 656                 ha->dfs_tgt_counters = NULL;
 657         }
 658
 659         if (ha->dfs_fce) {
 660                 debugfs_remove(ha->dfs_fce);
 661                 ha->dfs_fce = NULL;
 662         }
 663
 664         if (vha->dfs_rport_root) {
 665                 debugfs_remove_recursive(vha->dfs_rport_root);
 666                 vha->dfs_rport_root = NULL;
 667         }
 668
 669         if (ha->dfs_dir) {
 670                 debugfs_remove(ha->dfs_dir);
 671                 ha->dfs_dir = NULL;
 672                 atomic_dec(&qla2x00_dfs_root_count);
 673         }
 674
 675         if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
 676             qla2x00_dfs_root) {
 677                 debugfs_remove(qla2x00_dfs_root);
 678                 qla2x00_dfs_root = NULL;
 679         }
 680
 681         return 0;
 682 }