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 qla_tgt_sess *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, &tgt->sess_list, sess_list_entry) {
  30                         seq_printf(s, "%02x:%02x:%02x  %8phC  %d\n",
  31                                            sess->s_id.b.domain,sess->s_id.b.area,
  32                                            sess->s_id.b.al_pa,  sess->port_name,
  33                                            sess->loop_id);
  34                 }
  35                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
  36         }
  37
  38         return 0;
  39 }
  40
  41 static int
  42 qla2x00_dfs_tgt_sess_open(struct inode *inode, struct file *file)
  43 {
  44         scsi_qla_host_t *vha = inode->i_private;
  45         return single_open(file, qla2x00_dfs_tgt_sess_show, vha);
  46 }
  47
  48
  49 static const struct file_operations dfs_tgt_sess_ops = {
  50         .open           = qla2x00_dfs_tgt_sess_open,
  51         .read           = seq_read,
  52         .llseek         = seq_lseek,
  53         .release        = single_release,
  54 };
  55
  56 static int
  57 qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
  58 {
  59         struct scsi_qla_host *vha = s->private;
  60         struct qla_hw_data *ha = vha->hw;
  61
  62         seq_puts(s, "FW Resource count\n\n");
  63         seq_printf(s, "Original TGT exchg count[%d]\n",
  64             ha->orig_fw_tgt_xcb_count);
  65         seq_printf(s, "current TGT exchg count[%d]\n",
  66             ha->cur_fw_tgt_xcb_count);
  67         seq_printf(s, "original Initiator Exchange count[%d]\n",
  68             ha->orig_fw_xcb_count);
  69         seq_printf(s, "Current Initiator Exchange count[%d]\n",
  70             ha->cur_fw_xcb_count);
  71         seq_printf(s, "Original IOCB count[%d]\n", ha->orig_fw_iocb_count);
  72         seq_printf(s, "Current IOCB count[%d]\n", ha->cur_fw_iocb_count);
  73         seq_printf(s, "MAX VP count[%d]\n", ha->max_npiv_vports);
  74         seq_printf(s, "MAX FCF count[%d]\n", ha->fw_max_fcf_count);
  75
  76         return 0;
  77 }
  78
  79 static int
  80 qla_dfs_fw_resource_cnt_open(struct inode *inode, struct file *file)
  81 {
  82         struct scsi_qla_host *vha = inode->i_private;
  83         return single_open(file, qla_dfs_fw_resource_cnt_show, vha);
  84 }
  85
  86 static const struct file_operations dfs_fw_resource_cnt_ops = {
  87         .open           = qla_dfs_fw_resource_cnt_open,
  88         .read           = seq_read,
  89         .llseek         = seq_lseek,
  90         .release        = single_release,
  91 };
  92
  93 static int
  94 qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
  95 {
  96         struct scsi_qla_host *vha = s->private;
  97
  98         seq_puts(s, "Target Counters\n");
  99         seq_printf(s, "qla_core_sbt_cmd = %lld\n",
 100                 vha->tgt_counters.qla_core_sbt_cmd);
 101         seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
 102                 vha->tgt_counters.qla_core_ret_sta_ctio);
 103         seq_printf(s, "qla_core_ret_ctio = %lld\n",
 104                 vha->tgt_counters.qla_core_ret_ctio);
 105         seq_printf(s, "core_qla_que_buf = %lld\n",
 106                 vha->tgt_counters.core_qla_que_buf);
 107         seq_printf(s, "core_qla_snd_status = %lld\n",
 108                 vha->tgt_counters.core_qla_snd_status);
 109         seq_printf(s, "core_qla_free_cmd = %lld\n",
 110                 vha->tgt_counters.core_qla_free_cmd);
 111         seq_printf(s, "num alloc iocb failed = %lld\n",
 112                 vha->tgt_counters.num_alloc_iocb_failed);
 113         seq_printf(s, "num term exchange sent = %lld\n",
 114                 vha->tgt_counters.num_term_xchg_sent);
 115         seq_printf(s, "num Q full sent = %lld\n",
 116                 vha->tgt_counters.num_q_full_sent);
 117
 118         return 0;
 119 }
 120
 121 static int
 122 qla_dfs_tgt_counters_open(struct inode *inode, struct file *file)
 123 {
 124         struct scsi_qla_host *vha = inode->i_private;
 125         return single_open(file, qla_dfs_tgt_counters_show, vha);
 126 }
 127
 128 static const struct file_operations dfs_tgt_counters_ops = {
 129         .open           = qla_dfs_tgt_counters_open,
 130         .read           = seq_read,
 131         .llseek         = seq_lseek,
 132         .release        = single_release,
 133 };
 134
 135 static int
 136 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
 137 {
 138         scsi_qla_host_t *vha = s->private;
 139         uint32_t cnt;
 140         uint32_t *fce;
 141         uint64_t fce_start;
 142         struct qla_hw_data *ha = vha->hw;
 143
 144         mutex_lock(&ha->fce_mutex);
 145
 146         seq_puts(s, "FCE Trace Buffer\n");
 147         seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
 148         seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
 149         seq_puts(s, "FCE Enable Registers\n");
 150         seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
 151             ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
 152             ha->fce_mb[5], ha->fce_mb[6]);
 153
 154         fce = (uint32_t *) ha->fce;
 155         fce_start = (unsigned long long) ha->fce_dma;
 156         for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
 157                 if (cnt % 8 == 0)
 158                         seq_printf(s, "\n%llx: ",
 159                             (unsigned long long)((cnt * 4) + fce_start));
 160                 else
 161                         seq_putc(s, ' ');
 162                 seq_printf(s, "%08x", *fce++);
 163         }
 164
 165         seq_puts(s, "\nEnd\n");
 166
 167         mutex_unlock(&ha->fce_mutex);
 168
 169         return 0;
 170 }
 171
 172 static int
 173 qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
 174 {
 175         scsi_qla_host_t *vha = inode->i_private;
 176         struct qla_hw_data *ha = vha->hw;
 177         int rval;
 178
 179         if (!ha->flags.fce_enabled)
 180                 goto out;
 181
 182         mutex_lock(&ha->fce_mutex);
 183
 184         /* Pause tracing to flush FCE buffers. */
 185         rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
 186         if (rval)
 187                 ql_dbg(ql_dbg_user, vha, 0x705c,
 188                     "DebugFS: Unable to disable FCE (%d).\n", rval);
 189
 190         ha->flags.fce_enabled = 0;
 191
 192         mutex_unlock(&ha->fce_mutex);
 193 out:
 194         return single_open(file, qla2x00_dfs_fce_show, vha);
 195 }
 196
 197 static int
 198 qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
 199 {
 200         scsi_qla_host_t *vha = inode->i_private;
 201         struct qla_hw_data *ha = vha->hw;
 202         int rval;
 203
 204         if (ha->flags.fce_enabled)
 205                 goto out;
 206
 207         mutex_lock(&ha->fce_mutex);
 208
 209         /* Re-enable FCE tracing. */
 210         ha->flags.fce_enabled = 1;
 211         memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
 212         rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
 213             ha->fce_mb, &ha->fce_bufs);
 214         if (rval) {
 215                 ql_dbg(ql_dbg_user, vha, 0x700d,
 216                     "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
 217                 ha->flags.fce_enabled = 0;
 218         }
 219
 220         mutex_unlock(&ha->fce_mutex);
 221 out:
 222         return single_release(inode, file);
 223 }
 224
 225 static const struct file_operations dfs_fce_ops = {
 226         .open           = qla2x00_dfs_fce_open,
 227         .read           = seq_read,
 228         .llseek         = seq_lseek,
 229         .release        = qla2x00_dfs_fce_release,
 230 };
 231
 232 int
 233 qla2x00_dfs_setup(scsi_qla_host_t *vha)
 234 {
 235         struct qla_hw_data *ha = vha->hw;
 236
 237         if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
 238             !IS_QLA27XX(ha))
 239                 goto out;
 240         if (!ha->fce)
 241                 goto out;
 242
 243         if (qla2x00_dfs_root)
 244                 goto create_dir;
 245
 246         atomic_set(&qla2x00_dfs_root_count, 0);
 247         qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
 248         if (!qla2x00_dfs_root) {
 249                 ql_log(ql_log_warn, vha, 0x00f7,
 250                     "Unable to create debugfs root directory.\n");
 251                 goto out;
 252         }
 253
 254 create_dir:
 255         if (ha->dfs_dir)
 256                 goto create_nodes;
 257
 258         mutex_init(&ha->fce_mutex);
 259         ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
 260         if (!ha->dfs_dir) {
 261                 ql_log(ql_log_warn, vha, 0x00f8,
 262                     "Unable to create debugfs ha directory.\n");
 263                 goto out;
 264         }
 265
 266         atomic_inc(&qla2x00_dfs_root_count);
 267
 268 create_nodes:
 269         ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
 270             S_IRUSR, ha->dfs_dir, vha, &dfs_fw_resource_cnt_ops);
 271         if (!ha->dfs_fw_resource_cnt) {
 272                 ql_log(ql_log_warn, vha, 0x00fd,
 273                     "Unable to create debugFS fw_resource_count node.\n");
 274                 goto out;
 275         }
 276
 277         ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
 278             ha->dfs_dir, vha, &dfs_tgt_counters_ops);
 279         if (!ha->dfs_tgt_counters) {
 280                 ql_log(ql_log_warn, vha, 0xd301,
 281                     "Unable to create debugFS tgt_counters node.\n");
 282                 goto out;
 283         }
 284
 285         ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
 286             &dfs_fce_ops);
 287         if (!ha->dfs_fce) {
 288                 ql_log(ql_log_warn, vha, 0x00f9,
 289                     "Unable to create debugfs fce node.\n");
 290                 goto out;
 291         }
 292
 293         ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
 294                 S_IRUSR, ha->dfs_dir, vha, &dfs_tgt_sess_ops);
 295         if (!ha->tgt.dfs_tgt_sess) {
 296                 ql_log(ql_log_warn, vha, 0xffff,
 297                         "Unable to create debugFS tgt_sess node.\n");
 298                 goto out;
 299         }
 300
 301 out:
 302         return 0;
 303 }
 304
 305 int
 306 qla2x00_dfs_remove(scsi_qla_host_t *vha)
 307 {
 308         struct qla_hw_data *ha = vha->hw;
 309
 310         if (ha->tgt.dfs_tgt_sess) {
 311                 debugfs_remove(ha->tgt.dfs_tgt_sess);
 312                 ha->tgt.dfs_tgt_sess = NULL;
 313         }
 314
 315         if (ha->dfs_fw_resource_cnt) {
 316                 debugfs_remove(ha->dfs_fw_resource_cnt);
 317                 ha->dfs_fw_resource_cnt = NULL;
 318         }
 319
 320         if (ha->dfs_tgt_counters) {
 321                 debugfs_remove(ha->dfs_tgt_counters);
 322                 ha->dfs_tgt_counters = NULL;
 323         }
 324
 325         if (ha->dfs_fce) {
 326                 debugfs_remove(ha->dfs_fce);
 327                 ha->dfs_fce = NULL;
 328         }
 329
 330         if (ha->dfs_dir) {
 331                 debugfs_remove(ha->dfs_dir);
 332                 ha->dfs_dir = NULL;
 333                 atomic_dec(&qla2x00_dfs_root_count);
 334         }
 335
 336         if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
 337             qla2x00_dfs_root) {
 338                 debugfs_remove(qla2x00_dfs_root);
 339                 qla2x00_dfs_root = NULL;
 340         }
 341
 342         return 0;
 343 }