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 static int
  16 qla2x00_dfs_tgt_sess_show(struct seq_file *s, void *unused)
  17 {
  18         scsi_qla_host_t *vha = s->private;
  19         struct qla_hw_data *ha = vha->hw;
  20         unsigned long flags;
  21         struct fc_port *sess = NULL;
  22         struct qla_tgt *tgt= vha->vha_tgt.qla_tgt;
  23
  24         seq_printf(s, "%s\n",vha->host_str);
  25         if (tgt) {
  26                 seq_printf(s, "Port ID   Port Name                Handle\n");
  27
  28                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
  29                 list_for_each_entry(sess, &vha->vp_fcports, list)
  30                         seq_printf(s, "%02x:%02x:%02x  %8phC  %d\n",
  31                             sess->d_id.b.domain, sess->d_id.b.area,
  32                             sess->d_id.b.al_pa, sess->port_name,
  33                             sess->loop_id);
  34                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
  35         }
  36
  37         return 0;
  38 }
  39
  40 static int
  41 qla2x00_dfs_tgt_sess_open(struct inode *inode, struct file *file)
  42 {
  43         scsi_qla_host_t *vha = inode->i_private;
  44         return single_open(file, qla2x00_dfs_tgt_sess_show, vha);
  45 }
  46
  47
  48 static const struct file_operations dfs_tgt_sess_ops = {
  49         .open           = qla2x00_dfs_tgt_sess_open,
  50         .read           = seq_read,
  51         .llseek         = seq_lseek,
  52         .release        = single_release,
  53 };
  54
  55 static int
  56 qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
  57 {
  58         struct scsi_qla_host *vha = s->private;
  59         struct qla_hw_data *ha = vha->hw;
  60
  61         seq_puts(s, "FW Resource count\n\n");
  62         seq_printf(s, "Original TGT exchg count[%d]\n",
  63             ha->orig_fw_tgt_xcb_count);
  64         seq_printf(s, "current TGT exchg count[%d]\n",
  65             ha->cur_fw_tgt_xcb_count);
  66         seq_printf(s, "original Initiator Exchange count[%d]\n",
  67             ha->orig_fw_xcb_count);
  68         seq_printf(s, "Current Initiator Exchange count[%d]\n",
  69             ha->cur_fw_xcb_count);
  70         seq_printf(s, "Original IOCB count[%d]\n", ha->orig_fw_iocb_count);
  71         seq_printf(s, "Current IOCB count[%d]\n", ha->cur_fw_iocb_count);
  72         seq_printf(s, "MAX VP count[%d]\n", ha->max_npiv_vports);
  73         seq_printf(s, "MAX FCF count[%d]\n", ha->fw_max_fcf_count);
  74
  75         return 0;
  76 }
  77
  78 static int
  79 qla_dfs_fw_resource_cnt_open(struct inode *inode, struct file *file)
  80 {
  81         struct scsi_qla_host *vha = inode->i_private;
  82         return single_open(file, qla_dfs_fw_resource_cnt_show, vha);
  83 }
  84
  85 static const struct file_operations dfs_fw_resource_cnt_ops = {
  86         .open           = qla_dfs_fw_resource_cnt_open,
  87         .read           = seq_read,
  88         .llseek         = seq_lseek,
  89         .release        = single_release,
  90 };
  91
  92 static int
  93 qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
  94 {
  95         struct scsi_qla_host *vha = s->private;
  96
  97         seq_puts(s, "Target Counters\n");
  98         seq_printf(s, "qla_core_sbt_cmd = %lld\n",
  99                 vha->tgt_counters.qla_core_sbt_cmd);
 100         seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
 101                 vha->tgt_counters.qla_core_ret_sta_ctio);
 102         seq_printf(s, "qla_core_ret_ctio = %lld\n",
 103                 vha->tgt_counters.qla_core_ret_ctio);
 104         seq_printf(s, "core_qla_que_buf = %lld\n",
 105                 vha->tgt_counters.core_qla_que_buf);
 106         seq_printf(s, "core_qla_snd_status = %lld\n",
 107                 vha->tgt_counters.core_qla_snd_status);
 108         seq_printf(s, "core_qla_free_cmd = %lld\n",
 109                 vha->tgt_counters.core_qla_free_cmd);
 110         seq_printf(s, "num alloc iocb failed = %lld\n",
 111                 vha->tgt_counters.num_alloc_iocb_failed);
 112         seq_printf(s, "num term exchange sent = %lld\n",
 113                 vha->tgt_counters.num_term_xchg_sent);
 114         seq_printf(s, "num Q full sent = %lld\n",
 115                 vha->tgt_counters.num_q_full_sent);
 116
 117         return 0;
 118 }
 119
 120 static int
 121 qla_dfs_tgt_counters_open(struct inode *inode, struct file *file)
 122 {
 123         struct scsi_qla_host *vha = inode->i_private;
 124         return single_open(file, qla_dfs_tgt_counters_show, vha);
 125 }
 126
 127 static const struct file_operations dfs_tgt_counters_ops = {
 128         .open           = qla_dfs_tgt_counters_open,
 129         .read           = seq_read,
 130         .llseek         = seq_lseek,
 131         .release        = single_release,
 132 };
 133
 134 static int
 135 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
 136 {
 137         scsi_qla_host_t *vha = s->private;
 138         uint32_t cnt;
 139         uint32_t *fce;
 140         uint64_t fce_start;
 141         struct qla_hw_data *ha = vha->hw;
 142
 143         mutex_lock(&ha->fce_mutex);
 144
 145         seq_puts(s, "FCE Trace Buffer\n");
 146         seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
 147         seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
 148         seq_puts(s, "FCE Enable Registers\n");
 149         seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
 150             ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
 151             ha->fce_mb[5], ha->fce_mb[6]);
 152
 153         fce = (uint32_t *) ha->fce;
 154         fce_start = (unsigned long long) ha->fce_dma;
 155         for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
 156                 if (cnt % 8 == 0)
 157                         seq_printf(s, "\n%llx: ",
 158                             (unsigned long long)((cnt * 4) + fce_start));
 159                 else
 160                         seq_putc(s, ' ');
 161                 seq_printf(s, "%08x", *fce++);
 162         }
 163
 164         seq_puts(s, "\nEnd\n");
 165
 166         mutex_unlock(&ha->fce_mutex);
 167
 168         return 0;
 169 }
 170
 171 static int
 172 qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
 173 {
 174         scsi_qla_host_t *vha = inode->i_private;
 175         struct qla_hw_data *ha = vha->hw;
 176         int rval;
 177
 178         if (!ha->flags.fce_enabled)
 179                 goto out;
 180
 181         mutex_lock(&ha->fce_mutex);
 182
 183         /* Pause tracing to flush FCE buffers. */
 184         rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
 185         if (rval)
 186                 ql_dbg(ql_dbg_user, vha, 0x705c,
 187                     "DebugFS: Unable to disable FCE (%d).\n", rval);
 188
 189         ha->flags.fce_enabled = 0;
 190
 191         mutex_unlock(&ha->fce_mutex);
 192 out:
 193         return single_open(file, qla2x00_dfs_fce_show, vha);
 194 }
 195
 196 static int
 197 qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
 198 {
 199         scsi_qla_host_t *vha = inode->i_private;
 200         struct qla_hw_data *ha = vha->hw;
 201         int rval;
 202
 203         if (ha->flags.fce_enabled)
 204                 goto out;
 205
 206         mutex_lock(&ha->fce_mutex);
 207
 208         /* Re-enable FCE tracing. */
 209         ha->flags.fce_enabled = 1;
 210         memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
 211         rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
 212             ha->fce_mb, &ha->fce_bufs);
 213         if (rval) {
 214                 ql_dbg(ql_dbg_user, vha, 0x700d,
 215                     "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
 216                 ha->flags.fce_enabled = 0;
 217         }
 218
 219         mutex_unlock(&ha->fce_mutex);
 220 out:
 221         return single_release(inode, file);
 222 }
 223
 224 static const struct file_operations dfs_fce_ops = {
 225         .open           = qla2x00_dfs_fce_open,
 226         .read           = seq_read,
 227         .llseek         = seq_lseek,
 228         .release        = qla2x00_dfs_fce_release,
 229 };
 230
 231 int
 232 qla2x00_dfs_setup(scsi_qla_host_t *vha)
 233 {
 234         struct qla_hw_data *ha = vha->hw;
 235
 236         if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
 237             !IS_QLA27XX(ha))
 238                 goto out;
 239         if (!ha->fce)
 240                 goto out;
 241
 242         if (qla2x00_dfs_root)
 243                 goto create_dir;
 244
 245         atomic_set(&qla2x00_dfs_root_count, 0);
 246         qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
 247         if (!qla2x00_dfs_root) {
 248                 ql_log(ql_log_warn, vha, 0x00f7,
 249                     "Unable to create debugfs root directory.\n");
 250                 goto out;
 251         }
 252
 253 create_dir:
 254         if (ha->dfs_dir)
 255                 goto create_nodes;
 256
 257         mutex_init(&ha->fce_mutex);
 258         ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
 259         if (!ha->dfs_dir) {
 260                 ql_log(ql_log_warn, vha, 0x00f8,
 261                     "Unable to create debugfs ha directory.\n");
 262                 goto out;
 263         }
 264
 265         atomic_inc(&qla2x00_dfs_root_count);
 266
 267 create_nodes:
 268         ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
 269             S_IRUSR, ha->dfs_dir, vha, &dfs_fw_resource_cnt_ops);
 270         if (!ha->dfs_fw_resource_cnt) {
 271                 ql_log(ql_log_warn, vha, 0x00fd,
 272                     "Unable to create debugFS fw_resource_count node.\n");
 273                 goto out;
 274         }
 275
 276         ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
 277             ha->dfs_dir, vha, &dfs_tgt_counters_ops);
 278         if (!ha->dfs_tgt_counters) {
 279                 ql_log(ql_log_warn, vha, 0xd301,
 280                     "Unable to create debugFS tgt_counters node.\n");
 281                 goto out;
 282         }
 283
 284         ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
 285             &dfs_fce_ops);
 286         if (!ha->dfs_fce) {
 287                 ql_log(ql_log_warn, vha, 0x00f9,
 288                     "Unable to create debugfs fce node.\n");
 289                 goto out;
 290         }
 291
 292         ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
 293                 S_IRUSR, ha->dfs_dir, vha, &dfs_tgt_sess_ops);
 294         if (!ha->tgt.dfs_tgt_sess) {
 295                 ql_log(ql_log_warn, vha, 0xffff,
 296                         "Unable to create debugFS tgt_sess node.\n");
 297                 goto out;
 298         }
 299
 300 out:
 301         return 0;
 302 }
 303
 304 int
 305 qla2x00_dfs_remove(scsi_qla_host_t *vha)
 306 {
 307         struct qla_hw_data *ha = vha->hw;
 308
 309         if (ha->tgt.dfs_tgt_sess) {
 310                 debugfs_remove(ha->tgt.dfs_tgt_sess);
 311                 ha->tgt.dfs_tgt_sess = NULL;
 312         }
 313
 314         if (ha->dfs_fw_resource_cnt) {
 315                 debugfs_remove(ha->dfs_fw_resource_cnt);
 316                 ha->dfs_fw_resource_cnt = NULL;
 317         }
 318
 319         if (ha->dfs_tgt_counters) {
 320                 debugfs_remove(ha->dfs_tgt_counters);
 321                 ha->dfs_tgt_counters = NULL;
 322         }
 323
 324         if (ha->dfs_fce) {
 325                 debugfs_remove(ha->dfs_fce);
 326                 ha->dfs_fce = NULL;
 327         }
 328
 329         if (ha->dfs_dir) {
 330                 debugfs_remove(ha->dfs_dir);
 331                 ha->dfs_dir = NULL;
 332                 atomic_dec(&qla2x00_dfs_root_count);
 333         }
 334
 335         if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
 336             qla2x00_dfs_root) {
 337                 debugfs_remove(qla2x00_dfs_root);
 338                 qla2x00_dfs_root = NULL;
 339         }
 340
 341         return 0;
 342 }