drivers/scsi/qedi/qedi_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic iSCSI Offload Driver
   4  * Copyright (c) 2016 Cavium Inc.
   5  */
   6
   7 #include "qedi.h"
   8 #include "qedi_dbg.h"
   9
  10 #include <linux/uaccess.h>
  11 #include <linux/debugfs.h>
  12 #include <linux/module.h>
  13
  14 int qedi_do_not_recover;
  15 static struct dentry *qedi_dbg_root;
  16
  17 void
  18 qedi_dbg_host_init(struct qedi_dbg_ctx *qedi,
  19                    const struct qedi_debugfs_ops *dops,
  20                    const struct file_operations *fops)
  21 {
  22         char host_dirname[32];
  23
  24         sprintf(host_dirname, "host%u", qedi->host_no);
  25         qedi->bdf_dentry = debugfs_create_dir(host_dirname, qedi_dbg_root);
  26
  27         while (dops) {
  28                 if (!(dops->name))
  29                         break;
  30
  31                 debugfs_create_file(dops->name, 0600, qedi->bdf_dentry, qedi,
  32                                     fops);
  33                 dops++;
  34                 fops++;
  35         }
  36 }
  37
  38 void
  39 qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi)
  40 {
  41         debugfs_remove_recursive(qedi->bdf_dentry);
  42         qedi->bdf_dentry = NULL;
  43 }
  44
  45 void
  46 qedi_dbg_init(char *drv_name)
  47 {
  48         qedi_dbg_root = debugfs_create_dir(drv_name, NULL);
  49 }
  50
  51 void
  52 qedi_dbg_exit(void)
  53 {
  54         debugfs_remove_recursive(qedi_dbg_root);
  55         qedi_dbg_root = NULL;
  56 }
  57
  58 static ssize_t
  59 qedi_dbg_do_not_recover_enable(struct qedi_dbg_ctx *qedi_dbg)
  60 {
  61         if (!qedi_do_not_recover)
  62                 qedi_do_not_recover = 1;
  63
  64         QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
  65                   qedi_do_not_recover);
  66         return 0;
  67 }
  68
  69 static ssize_t
  70 qedi_dbg_do_not_recover_disable(struct qedi_dbg_ctx *qedi_dbg)
  71 {
  72         if (qedi_do_not_recover)
  73                 qedi_do_not_recover = 0;
  74
  75         QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
  76                   qedi_do_not_recover);
  77         return 0;
  78 }
  79
  80 static struct qedi_list_of_funcs qedi_dbg_do_not_recover_ops[] = {
  81         { "enable", qedi_dbg_do_not_recover_enable },
  82         { "disable", qedi_dbg_do_not_recover_disable },
  83         { NULL, NULL }
  84 };
  85
  86 const struct qedi_debugfs_ops qedi_debugfs_ops[] = {
  87         { "gbl_ctx", NULL },
  88         { "do_not_recover", qedi_dbg_do_not_recover_ops},
  89         { "io_trace", NULL },
  90         { NULL, NULL }
  91 };
  92
  93 static ssize_t
  94 qedi_dbg_do_not_recover_cmd_write(struct file *filp, const char __user *buffer,
  95                                   size_t count, loff_t *ppos)
  96 {
  97         size_t cnt = 0;
  98         struct qedi_dbg_ctx *qedi_dbg =
  99                         (struct qedi_dbg_ctx *)filp->private_data;
 100         struct qedi_list_of_funcs *lof = qedi_dbg_do_not_recover_ops;
 101
 102         if (*ppos)
 103                 return 0;
 104
 105         while (lof) {
 106                 if (!(lof->oper_str))
 107                         break;
 108
 109                 if (!strncmp(lof->oper_str, buffer, strlen(lof->oper_str))) {
 110                         cnt = lof->oper_func(qedi_dbg);
 111                         break;
 112                 }
 113
 114                 lof++;
 115         }
 116         return (count - cnt);
 117 }
 118
 119 static ssize_t
 120 qedi_dbg_do_not_recover_cmd_read(struct file *filp, char __user *buffer,
 121                                  size_t count, loff_t *ppos)
 122 {
 123         size_t cnt = 0;
 124
 125         if (*ppos)
 126                 return 0;
 127
 128         cnt = sprintf(buffer, "do_not_recover=%d\n", qedi_do_not_recover);
 129         cnt = min_t(int, count, cnt - *ppos);
 130         *ppos += cnt;
 131         return cnt;
 132 }
 133
 134 static int
 135 qedi_gbl_ctx_show(struct seq_file *s, void *unused)
 136 {
 137         struct qedi_fastpath *fp = NULL;
 138         struct qed_sb_info *sb_info = NULL;
 139         struct status_block_e4 *sb = NULL;
 140         struct global_queue *que = NULL;
 141         int id;
 142         u16 prod_idx;
 143         struct qedi_ctx *qedi = s->private;
 144         unsigned long flags;
 145
 146         seq_puts(s, " DUMP CQ CONTEXT:\n");
 147
 148         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 149                 spin_lock_irqsave(&qedi->hba_lock, flags);
 150                 seq_printf(s, "=========FAST CQ PATH [%d] ==========\n", id);
 151                 fp = &qedi->fp_array[id];
 152                 sb_info = fp->sb_info;
 153                 sb = sb_info->sb_virt;
 154                 prod_idx = (sb->pi_array[QEDI_PROTO_CQ_PROD_IDX] &
 155                             STATUS_BLOCK_E4_PROD_INDEX_MASK);
 156                 seq_printf(s, "SB PROD IDX: %d\n", prod_idx);
 157                 que = qedi->global_queues[fp->sb_id];
 158                 seq_printf(s, "DRV CONS IDX: %d\n", que->cq_cons_idx);
 159                 seq_printf(s, "CQ complete host memory: %d\n", fp->sb_id);
 160                 seq_puts(s, "=========== END ==================\n\n\n");
 161                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 162         }
 163         return 0;
 164 }
 165
 166 static int
 167 qedi_dbg_gbl_ctx_open(struct inode *inode, struct file *file)
 168 {
 169         struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
 170         struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
 171                                              dbg_ctx);
 172
 173         return single_open(file, qedi_gbl_ctx_show, qedi);
 174 }
 175
 176 static int
 177 qedi_io_trace_show(struct seq_file *s, void *unused)
 178 {
 179         int id, idx = 0;
 180         struct qedi_ctx *qedi = s->private;
 181         struct qedi_io_log *io_log;
 182         unsigned long flags;
 183
 184         seq_puts(s, " DUMP IO LOGS:\n");
 185         spin_lock_irqsave(&qedi->io_trace_lock, flags);
 186         idx = qedi->io_trace_idx;
 187         for (id = 0; id < QEDI_IO_TRACE_SIZE; id++) {
 188                 io_log = &qedi->io_trace_buf[idx];
 189                 seq_printf(s, "iodir-%d:", io_log->direction);
 190                 seq_printf(s, "tid-0x%x:", io_log->task_id);
 191                 seq_printf(s, "cid-0x%x:", io_log->cid);
 192                 seq_printf(s, "lun-%d:", io_log->lun);
 193                 seq_printf(s, "op-0x%02x:", io_log->op);
 194                 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
 195                            io_log->lba[1], io_log->lba[2], io_log->lba[3]);
 196                 seq_printf(s, "buflen-%d:", io_log->bufflen);
 197                 seq_printf(s, "sgcnt-%d:", io_log->sg_count);
 198                 seq_printf(s, "res-0x%08x:", io_log->result);
 199                 seq_printf(s, "jif-%lu:", io_log->jiffies);
 200                 seq_printf(s, "blk_req_cpu-%d:", io_log->blk_req_cpu);
 201                 seq_printf(s, "req_cpu-%d:", io_log->req_cpu);
 202                 seq_printf(s, "intr_cpu-%d:", io_log->intr_cpu);
 203                 seq_printf(s, "blk_rsp_cpu-%d\n", io_log->blk_rsp_cpu);
 204
 205                 idx++;
 206                 if (idx == QEDI_IO_TRACE_SIZE)
 207                         idx = 0;
 208         }
 209         spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
 210         return 0;
 211 }
 212
 213 static int
 214 qedi_dbg_io_trace_open(struct inode *inode, struct file *file)
 215 {
 216         struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
 217         struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
 218                                              dbg_ctx);
 219
 220         return single_open(file, qedi_io_trace_show, qedi);
 221 }
 222
 223 const struct file_operations qedi_dbg_fops[] = {
 224         qedi_dbg_fileops_seq(qedi, gbl_ctx),
 225         qedi_dbg_fileops(qedi, do_not_recover),
 226         qedi_dbg_fileops_seq(qedi, io_trace),
 227         { },
 228 };