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         /* DIF stats */
 118         seq_printf(s, "DIF Inp Bytes = %lld\n",
 119                 vha->qla_stats.qla_dif_stats.dif_input_bytes);
 120         seq_printf(s, "DIF Outp Bytes = %lld\n",
 121                 vha->qla_stats.qla_dif_stats.dif_output_bytes);
 122         seq_printf(s, "DIF Inp Req = %lld\n",
 123                 vha->qla_stats.qla_dif_stats.dif_input_requests);
 124         seq_printf(s, "DIF Outp Req = %lld\n",
 125                 vha->qla_stats.qla_dif_stats.dif_output_requests);
 126         seq_printf(s, "DIF Guard err = %d\n",
 127                 vha->qla_stats.qla_dif_stats.dif_guard_err);
 128         seq_printf(s, "DIF Ref tag err = %d\n",
 129                 vha->qla_stats.qla_dif_stats.dif_ref_tag_err);
 130         seq_printf(s, "DIF App tag err = %d\n",
 131                 vha->qla_stats.qla_dif_stats.dif_app_tag_err);
 132         return 0;
 133 }
 134
 135 static int
 136 qla_dfs_tgt_counters_open(struct inode *inode, struct file *file)
 137 {
 138         struct scsi_qla_host *vha = inode->i_private;
 139         return single_open(file, qla_dfs_tgt_counters_show, vha);
 140 }
 141
 142 static const struct file_operations dfs_tgt_counters_ops = {
 143         .open           = qla_dfs_tgt_counters_open,
 144         .read           = seq_read,
 145         .llseek         = seq_lseek,
 146         .release        = single_release,
 147 };
 148
 149 static int
 150 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
 151 {
 152         scsi_qla_host_t *vha = s->private;
 153         uint32_t cnt;
 154         uint32_t *fce;
 155         uint64_t fce_start;
 156         struct qla_hw_data *ha = vha->hw;
 157
 158         mutex_lock(&ha->fce_mutex);
 159
 160         seq_puts(s, "FCE Trace Buffer\n");
 161         seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
 162         seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
 163         seq_puts(s, "FCE Enable Registers\n");
 164         seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
 165             ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
 166             ha->fce_mb[5], ha->fce_mb[6]);
 167
 168         fce = (uint32_t *) ha->fce;
 169         fce_start = (unsigned long long) ha->fce_dma;
 170         for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
 171                 if (cnt % 8 == 0)
 172                         seq_printf(s, "\n%llx: ",
 173                             (unsigned long long)((cnt * 4) + fce_start));
 174                 else
 175                         seq_putc(s, ' ');
 176                 seq_printf(s, "%08x", *fce++);
 177         }
 178
 179         seq_puts(s, "\nEnd\n");
 180
 181         mutex_unlock(&ha->fce_mutex);
 182
 183         return 0;
 184 }
 185
 186 static int
 187 qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
 188 {
 189         scsi_qla_host_t *vha = inode->i_private;
 190         struct qla_hw_data *ha = vha->hw;
 191         int rval;
 192
 193         if (!ha->flags.fce_enabled)
 194                 goto out;
 195
 196         mutex_lock(&ha->fce_mutex);
 197
 198         /* Pause tracing to flush FCE buffers. */
 199         rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
 200         if (rval)
 201                 ql_dbg(ql_dbg_user, vha, 0x705c,
 202                     "DebugFS: Unable to disable FCE (%d).\n", rval);
 203
 204         ha->flags.fce_enabled = 0;
 205
 206         mutex_unlock(&ha->fce_mutex);
 207 out:
 208         return single_open(file, qla2x00_dfs_fce_show, vha);
 209 }
 210
 211 static int
 212 qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
 213 {
 214         scsi_qla_host_t *vha = inode->i_private;
 215         struct qla_hw_data *ha = vha->hw;
 216         int rval;
 217
 218         if (ha->flags.fce_enabled)
 219                 goto out;
 220
 221         mutex_lock(&ha->fce_mutex);
 222
 223         /* Re-enable FCE tracing. */
 224         ha->flags.fce_enabled = 1;
 225         memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
 226         rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
 227             ha->fce_mb, &ha->fce_bufs);
 228         if (rval) {
 229                 ql_dbg(ql_dbg_user, vha, 0x700d,
 230                     "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
 231                 ha->flags.fce_enabled = 0;
 232         }
 233
 234         mutex_unlock(&ha->fce_mutex);
 235 out:
 236         return single_release(inode, file);
 237 }
 238
 239 static const struct file_operations dfs_fce_ops = {
 240         .open           = qla2x00_dfs_fce_open,
 241         .read           = seq_read,
 242         .llseek         = seq_lseek,
 243         .release        = qla2x00_dfs_fce_release,
 244 };
 245
 246 int
 247 qla2x00_dfs_setup(scsi_qla_host_t *vha)
 248 {
 249         struct qla_hw_data *ha = vha->hw;
 250
 251         if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
 252             !IS_QLA27XX(ha))
 253                 goto out;
 254         if (!ha->fce)
 255                 goto out;
 256
 257         if (qla2x00_dfs_root)
 258                 goto create_dir;
 259
 260         atomic_set(&qla2x00_dfs_root_count, 0);
 261         qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
 262         if (!qla2x00_dfs_root) {
 263                 ql_log(ql_log_warn, vha, 0x00f7,
 264                     "Unable to create debugfs root directory.\n");
 265                 goto out;
 266         }
 267
 268 create_dir:
 269         if (ha->dfs_dir)
 270                 goto create_nodes;
 271
 272         mutex_init(&ha->fce_mutex);
 273         ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
 274         if (!ha->dfs_dir) {
 275                 ql_log(ql_log_warn, vha, 0x00f8,
 276                     "Unable to create debugfs ha directory.\n");
 277                 goto out;
 278         }
 279
 280         atomic_inc(&qla2x00_dfs_root_count);
 281
 282 create_nodes:
 283         ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
 284             S_IRUSR, ha->dfs_dir, vha, &dfs_fw_resource_cnt_ops);
 285         if (!ha->dfs_fw_resource_cnt) {
 286                 ql_log(ql_log_warn, vha, 0x00fd,
 287                     "Unable to create debugFS fw_resource_count node.\n");
 288                 goto out;
 289         }
 290
 291         ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
 292             ha->dfs_dir, vha, &dfs_tgt_counters_ops);
 293         if (!ha->dfs_tgt_counters) {
 294                 ql_log(ql_log_warn, vha, 0xd301,
 295                     "Unable to create debugFS tgt_counters node.\n");
 296                 goto out;
 297         }
 298
 299         ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
 300             &dfs_fce_ops);
 301         if (!ha->dfs_fce) {
 302                 ql_log(ql_log_warn, vha, 0x00f9,
 303                     "Unable to create debugfs fce node.\n");
 304                 goto out;
 305         }
 306
 307         ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
 308                 S_IRUSR, ha->dfs_dir, vha, &dfs_tgt_sess_ops);
 309         if (!ha->tgt.dfs_tgt_sess) {
 310                 ql_log(ql_log_warn, vha, 0xffff,
 311                         "Unable to create debugFS tgt_sess node.\n");
 312                 goto out;
 313         }
 314
 315 out:
 316         return 0;
 317 }
 318
 319 int
 320 qla2x00_dfs_remove(scsi_qla_host_t *vha)
 321 {
 322         struct qla_hw_data *ha = vha->hw;
 323
 324         if (ha->tgt.dfs_tgt_sess) {
 325                 debugfs_remove(ha->tgt.dfs_tgt_sess);
 326                 ha->tgt.dfs_tgt_sess = NULL;
 327         }
 328
 329         if (ha->dfs_fw_resource_cnt) {
 330                 debugfs_remove(ha->dfs_fw_resource_cnt);
 331                 ha->dfs_fw_resource_cnt = NULL;
 332         }
 333
 334         if (ha->dfs_tgt_counters) {
 335                 debugfs_remove(ha->dfs_tgt_counters);
 336                 ha->dfs_tgt_counters = NULL;
 337         }
 338
 339         if (ha->dfs_fce) {
 340                 debugfs_remove(ha->dfs_fce);
 341                 ha->dfs_fce = NULL;
 342         }
 343
 344         if (ha->dfs_dir) {
 345                 debugfs_remove(ha->dfs_dir);
 346                 ha->dfs_dir = NULL;
 347                 atomic_dec(&qla2x00_dfs_root_count);
 348         }
 349
 350         if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
 351             qla2x00_dfs_root) {
 352                 debugfs_remove(qla2x00_dfs_root);
 353                 qla2x00_dfs_root = NULL;
 354         }
 355
 356         return 0;
 357 }