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