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