drivers/net/fjes/fjes_debugfs.c

   1 /*
   2  *  FUJITSU Extended Socket Network Device driver
   3  *  Copyright (c) 2015-2016 FUJITSU LIMITED
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, see <http://www.gnu.org/licenses/>.
  16  *
  17  * The full GNU General Public License is included in this distribution in
  18  * the file called "COPYING".
  19  *
  20  */
  21
  22 /* debugfs support for fjes driver */
  23
  24 #ifdef CONFIG_DEBUG_FS
  25
  26 #include <linux/debugfs.h>
  27 #include <linux/seq_file.h>
  28 #include <linux/platform_device.h>
  29
  30 #include "fjes.h"
  31
  32 static struct dentry *fjes_debug_root;
  33
  34 static const char * const ep_status_string[] = {
  35         "unshared",
  36         "shared",
  37         "waiting",
  38         "complete",
  39 };
  40
  41 static int fjes_dbg_status_show(struct seq_file *m, void *v)
  42 {
  43         struct fjes_adapter *adapter = m->private;
  44         struct fjes_hw *hw = &adapter->hw;
  45         int max_epid = hw->max_epid;
  46         int my_epid = hw->my_epid;
  47         int epidx;
  48
  49         seq_puts(m, "EPID\tSTATUS           SAME_ZONE        CONNECTED\n");
  50         for (epidx = 0; epidx < max_epid; epidx++) {
  51                 if (epidx == my_epid) {
  52                         seq_printf(m, "ep%d\t%-16c %-16c %-16c\n",
  53                                    epidx, '-', '-', '-');
  54                 } else {
  55                         seq_printf(m, "ep%d\t%-16s %-16c %-16c\n",
  56                                    epidx,
  57                                    ep_status_string[fjes_hw_get_partner_ep_status(hw, epidx)],
  58                                    fjes_hw_epid_is_same_zone(hw, epidx) ? 'Y' : 'N',
  59                                    fjes_hw_epid_is_shared(hw->hw_info.share, epidx) ? 'Y' : 'N');
  60                 }
  61         }
  62
  63         return 0;
  64 }
  65
  66 static int fjes_dbg_status_open(struct inode *inode, struct file *file)
  67 {
  68         return single_open(file, fjes_dbg_status_show, inode->i_private);
  69 }
  70
  71 static const struct file_operations fjes_dbg_status_fops = {
  72         .owner          = THIS_MODULE,
  73         .open           = fjes_dbg_status_open,
  74         .read           = seq_read,
  75         .llseek         = seq_lseek,
  76         .release        = single_release,
  77 };
  78
  79 void fjes_dbg_adapter_init(struct fjes_adapter *adapter)
  80 {
  81         const char *name = dev_name(&adapter->plat_dev->dev);
  82         struct dentry *pfile;
  83
  84         adapter->dbg_adapter = debugfs_create_dir(name, fjes_debug_root);
  85         if (!adapter->dbg_adapter) {
  86                 dev_err(&adapter->plat_dev->dev,
  87                         "debugfs entry for %s failed\n", name);
  88                 return;
  89         }
  90
  91         pfile = debugfs_create_file("status", 0444, adapter->dbg_adapter,
  92                                     adapter, &fjes_dbg_status_fops);
  93         if (!pfile)
  94                 dev_err(&adapter->plat_dev->dev,
  95                         "debugfs status for %s failed\n", name);
  96 }
  97
  98 void fjes_dbg_adapter_exit(struct fjes_adapter *adapter)
  99 {
 100         debugfs_remove_recursive(adapter->dbg_adapter);
 101         adapter->dbg_adapter = NULL;
 102 }
 103
 104 void fjes_dbg_init(void)
 105 {
 106         fjes_debug_root = debugfs_create_dir(fjes_driver_name, NULL);
 107         if (!fjes_debug_root)
 108                 pr_info("init of debugfs failed\n");
 109 }
 110
 111 void fjes_dbg_exit(void)
 112 {
 113         debugfs_remove_recursive(fjes_debug_root);
 114         fjes_debug_root = NULL;
 115 }
 116
 117 #endif /* CONFIG_DEBUG_FS */