drivers/scsi/qedi/qedi_debugfs.c

   1 /*
   2  * QLogic iSCSI Offload Driver
   3  * Copyright (c) 2016 Cavium Inc.
   4  *
   5  * This software is available under the terms of the GNU General Public License
   6  * (GPL) Version 2, available from the file COPYING in the main directory of
   7  * this source tree.
   8  */
   9
  10 #include "qedi.h"
  11 #include "qedi_dbg.h"
  12
  13 #include <linux/uaccess.h>
  14 #include <linux/debugfs.h>
  15 #include <linux/module.h>
  16
  17 int qedi_do_not_recover;
  18 static struct dentry *qedi_dbg_root;
  19
  20 void
  21 qedi_dbg_host_init(struct qedi_dbg_ctx *qedi,
  22                    const struct qedi_debugfs_ops *dops,
  23                    const struct file_operations *fops)
  24 {
  25         char host_dirname[32];
  26         struct dentry *file_dentry = NULL;
  27
  28         sprintf(host_dirname, "host%u", qedi->host_no);
  29         qedi->bdf_dentry = debugfs_create_dir(host_dirname, qedi_dbg_root);
  30         if (!qedi->bdf_dentry)
  31                 return;
  32
  33         while (dops) {
  34                 if (!(dops->name))
  35                         break;
  36
  37                 file_dentry = debugfs_create_file(dops->name, 0600,
  38                                                   qedi->bdf_dentry, qedi,
  39                                                   fops);
  40                 if (!file_dentry) {
  41                         QEDI_INFO(qedi, QEDI_LOG_DEBUGFS,
  42                                   "Debugfs entry %s creation failed\n",
  43                                   dops->name);
  44                         debugfs_remove_recursive(qedi->bdf_dentry);
  45                         return;
  46                 }
  47                 dops++;
  48                 fops++;
  49         }
  50 }
  51
  52 void
  53 qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi)
  54 {
  55         debugfs_remove_recursive(qedi->bdf_dentry);
  56         qedi->bdf_dentry = NULL;
  57 }
  58
  59 void
  60 qedi_dbg_init(char *drv_name)
  61 {
  62         qedi_dbg_root = debugfs_create_dir(drv_name, NULL);
  63         if (!qedi_dbg_root)
  64                 QEDI_INFO(NULL, QEDI_LOG_DEBUGFS, "Init of debugfs failed\n");
  65 }
  66
  67 void
  68 qedi_dbg_exit(void)
  69 {
  70         debugfs_remove_recursive(qedi_dbg_root);
  71         qedi_dbg_root = NULL;
  72 }
  73
  74 static ssize_t
  75 qedi_dbg_do_not_recover_enable(struct qedi_dbg_ctx *qedi_dbg)
  76 {
  77         if (!qedi_do_not_recover)
  78                 qedi_do_not_recover = 1;
  79
  80         QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
  81                   qedi_do_not_recover);
  82         return 0;
  83 }
  84
  85 static ssize_t
  86 qedi_dbg_do_not_recover_disable(struct qedi_dbg_ctx *qedi_dbg)
  87 {
  88         if (qedi_do_not_recover)
  89                 qedi_do_not_recover = 0;
  90
  91         QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
  92                   qedi_do_not_recover);
  93         return 0;
  94 }
  95
  96 static struct qedi_list_of_funcs qedi_dbg_do_not_recover_ops[] = {
  97         { "enable", qedi_dbg_do_not_recover_enable },
  98         { "disable", qedi_dbg_do_not_recover_disable },
  99         { NULL, NULL }
 100 };
 101
 102 const struct qedi_debugfs_ops qedi_debugfs_ops[] = {
 103         { "gbl_ctx", NULL },
 104         { "do_not_recover", qedi_dbg_do_not_recover_ops},
 105         { "io_trace", NULL },
 106         { NULL, NULL }
 107 };
 108
 109 static ssize_t
 110 qedi_dbg_do_not_recover_cmd_write(struct file *filp, const char __user *buffer,
 111                                   size_t count, loff_t *ppos)
 112 {
 113         size_t cnt = 0;
 114         struct qedi_dbg_ctx *qedi_dbg =
 115                         (struct qedi_dbg_ctx *)filp->private_data;
 116         struct qedi_list_of_funcs *lof = qedi_dbg_do_not_recover_ops;
 117
 118         if (*ppos)
 119                 return 0;
 120
 121         while (lof) {
 122                 if (!(lof->oper_str))
 123                         break;
 124
 125                 if (!strncmp(lof->oper_str, buffer, strlen(lof->oper_str))) {
 126                         cnt = lof->oper_func(qedi_dbg);
 127                         break;
 128                 }
 129
 130                 lof++;
 131         }
 132         return (count - cnt);
 133 }
 134
 135 static ssize_t
 136 qedi_dbg_do_not_recover_cmd_read(struct file *filp, char __user *buffer,
 137                                  size_t count, loff_t *ppos)
 138 {
 139         size_t cnt = 0;
 140
 141         if (*ppos)
 142                 return 0;
 143
 144         cnt = sprintf(buffer, "do_not_recover=%d\n", qedi_do_not_recover);
 145         cnt = min_t(int, count, cnt - *ppos);
 146         *ppos += cnt;
 147         return cnt;
 148 }
 149
 150 static int
 151 qedi_gbl_ctx_show(struct seq_file *s, void *unused)
 152 {
 153         struct qedi_fastpath *fp = NULL;
 154         struct qed_sb_info *sb_info = NULL;
 155         struct status_block_e4 *sb = NULL;
 156         struct global_queue *que = NULL;
 157         int id;
 158         u16 prod_idx;
 159         struct qedi_ctx *qedi = s->private;
 160         unsigned long flags;
 161
 162         seq_puts(s, " DUMP CQ CONTEXT:\n");
 163
 164         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 165                 spin_lock_irqsave(&qedi->hba_lock, flags);
 166                 seq_printf(s, "=========FAST CQ PATH [%d] ==========\n", id);
 167                 fp = &qedi->fp_array[id];
 168                 sb_info = fp->sb_info;
 169                 sb = sb_info->sb_virt;
 170                 prod_idx = (sb->pi_array[QEDI_PROTO_CQ_PROD_IDX] &
 171                             STATUS_BLOCK_E4_PROD_INDEX_MASK);
 172                 seq_printf(s, "SB PROD IDX: %d\n", prod_idx);
 173                 que = qedi->global_queues[fp->sb_id];
 174                 seq_printf(s, "DRV CONS IDX: %d\n", que->cq_cons_idx);
 175                 seq_printf(s, "CQ complete host memory: %d\n", fp->sb_id);
 176                 seq_puts(s, "=========== END ==================\n\n\n");
 177                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 178         }
 179         return 0;
 180 }
 181
 182 static int
 183 qedi_dbg_gbl_ctx_open(struct inode *inode, struct file *file)
 184 {
 185         struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
 186         struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
 187                                              dbg_ctx);
 188
 189         return single_open(file, qedi_gbl_ctx_show, qedi);
 190 }
 191
 192 static int
 193 qedi_io_trace_show(struct seq_file *s, void *unused)
 194 {
 195         int id, idx = 0;
 196         struct qedi_ctx *qedi = s->private;
 197         struct qedi_io_log *io_log;
 198         unsigned long flags;
 199
 200         seq_puts(s, " DUMP IO LOGS:\n");
 201         spin_lock_irqsave(&qedi->io_trace_lock, flags);
 202         idx = qedi->io_trace_idx;
 203         for (id = 0; id < QEDI_IO_TRACE_SIZE; id++) {
 204                 io_log = &qedi->io_trace_buf[idx];
 205                 seq_printf(s, "iodir-%d:", io_log->direction);
 206                 seq_printf(s, "tid-0x%x:", io_log->task_id);
 207                 seq_printf(s, "cid-0x%x:", io_log->cid);
 208                 seq_printf(s, "lun-%d:", io_log->lun);
 209                 seq_printf(s, "op-0x%02x:", io_log->op);
 210                 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
 211                            io_log->lba[1], io_log->lba[2], io_log->lba[3]);
 212                 seq_printf(s, "buflen-%d:", io_log->bufflen);
 213                 seq_printf(s, "sgcnt-%d:", io_log->sg_count);
 214                 seq_printf(s, "res-0x%08x:", io_log->result);
 215                 seq_printf(s, "jif-%lu:", io_log->jiffies);
 216                 seq_printf(s, "blk_req_cpu-%d:", io_log->blk_req_cpu);
 217                 seq_printf(s, "req_cpu-%d:", io_log->req_cpu);
 218                 seq_printf(s, "intr_cpu-%d:", io_log->intr_cpu);
 219                 seq_printf(s, "blk_rsp_cpu-%d\n", io_log->blk_rsp_cpu);
 220
 221                 idx++;
 222                 if (idx == QEDI_IO_TRACE_SIZE)
 223                         idx = 0;
 224         }
 225         spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
 226         return 0;
 227 }
 228
 229 static int
 230 qedi_dbg_io_trace_open(struct inode *inode, struct file *file)
 231 {
 232         struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
 233         struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
 234                                              dbg_ctx);
 235
 236         return single_open(file, qedi_io_trace_show, qedi);
 237 }
 238
 239 const struct file_operations qedi_dbg_fops[] = {
 240         qedi_dbg_fileops_seq(qedi, gbl_ctx),
 241         qedi_dbg_fileops(qedi, do_not_recover),
 242         qedi_dbg_fileops_seq(qedi, io_trace),
 243         { },
 244 };