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