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