drivers/net/wireless/ath/wcn36xx/debug.c

   1 /*
   2  * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18
  19 #include <linux/debugfs.h>
  20 #include <linux/uaccess.h>
  21 #include "wcn36xx.h"
  22 #include "debug.h"
  23 #include "pmc.h"
  24
  25 #ifdef CONFIG_WCN36XX_DEBUGFS
  26
  27 static ssize_t read_file_bool_bmps(struct file *file, char __user *user_buf,
  28                                    size_t count, loff_t *ppos)
  29 {
  30         struct wcn36xx *wcn = file->private_data;
  31         struct wcn36xx_vif *vif_priv = NULL;
  32         struct ieee80211_vif *vif = NULL;
  33         char buf[3];
  34
  35         list_for_each_entry(vif_priv, &wcn->vif_list, list) {
  36                         vif = wcn36xx_priv_to_vif(vif_priv);
  37                         if (NL80211_IFTYPE_STATION == vif->type) {
  38                                 if (vif_priv->pw_state == WCN36XX_BMPS)
  39                                         buf[0] = '1';
  40                                 else
  41                                         buf[0] = '0';
  42                                 break;
  43                         }
  44         }
  45         buf[1] = '\n';
  46         buf[2] = 0x00;
  47
  48         return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
  49 }
  50
  51 static ssize_t write_file_bool_bmps(struct file *file,
  52                                     const char __user *user_buf,
  53                                     size_t count, loff_t *ppos)
  54 {
  55         struct wcn36xx *wcn = file->private_data;
  56         struct wcn36xx_vif *vif_priv = NULL;
  57         struct ieee80211_vif *vif = NULL;
  58
  59         char buf[32];
  60         int buf_size;
  61
  62         buf_size = min(count, (sizeof(buf)-1));
  63         if (copy_from_user(buf, user_buf, buf_size))
  64                 return -EFAULT;
  65
  66         switch (buf[0]) {
  67         case 'y':
  68         case 'Y':
  69         case '1':
  70                 list_for_each_entry(vif_priv, &wcn->vif_list, list) {
  71                         vif = wcn36xx_priv_to_vif(vif_priv);
  72                         if (NL80211_IFTYPE_STATION == vif->type) {
  73                                 wcn36xx_enable_keep_alive_null_packet(wcn, vif);
  74                                 wcn36xx_pmc_enter_bmps_state(wcn, vif);
  75                         }
  76                 }
  77                 break;
  78         case 'n':
  79         case 'N':
  80         case '0':
  81                 list_for_each_entry(vif_priv, &wcn->vif_list, list) {
  82                         vif = wcn36xx_priv_to_vif(vif_priv);
  83                         if (NL80211_IFTYPE_STATION == vif->type)
  84                                 wcn36xx_pmc_exit_bmps_state(wcn, vif);
  85                 }
  86                 break;
  87         }
  88
  89         return count;
  90 }
  91
  92 static const struct file_operations fops_wcn36xx_bmps = {
  93         .open = simple_open,
  94         .read  =       read_file_bool_bmps,
  95         .write =       write_file_bool_bmps,
  96 };
  97
  98 static ssize_t write_file_dump(struct file *file,
  99                                     const char __user *user_buf,
 100                                     size_t count, loff_t *ppos)
 101 {
 102         struct wcn36xx *wcn = file->private_data;
 103         char buf[255], *tmp;
 104         int buf_size;
 105         u32 arg[WCN36xx_MAX_DUMP_ARGS];
 106         int i;
 107
 108         memset(buf, 0, sizeof(buf));
 109         memset(arg, 0, sizeof(arg));
 110
 111         buf_size = min(count, (sizeof(buf) - 1));
 112         if (copy_from_user(buf, user_buf, buf_size))
 113                 return -EFAULT;
 114
 115         tmp = buf;
 116
 117         for (i = 0; i < WCN36xx_MAX_DUMP_ARGS; i++) {
 118                 char *begin;
 119                 begin = strsep(&tmp, " ");
 120                 if (begin == NULL)
 121                         break;
 122
 123                 if (kstrtou32(begin, 0, &arg[i]) != 0)
 124                         break;
 125         }
 126
 127         wcn36xx_info("DUMP args is %d %d %d %d %d\n", arg[0], arg[1], arg[2],
 128                      arg[3], arg[4]);
 129         wcn36xx_smd_dump_cmd_req(wcn, arg[0], arg[1], arg[2], arg[3], arg[4]);
 130
 131         return count;
 132 }
 133
 134 static const struct file_operations fops_wcn36xx_dump = {
 135         .open = simple_open,
 136         .write =       write_file_dump,
 137 };
 138
 139 #define ADD_FILE(name, mode, fop, priv_data)            \
 140         do {                                                    \
 141                 struct dentry *d;                               \
 142                 d = debugfs_create_file(__stringify(name),      \
 143                                         mode, dfs->rootdir,     \
 144                                         priv_data, fop);        \
 145                 dfs->file_##name.dentry = d;                    \
 146                 if (IS_ERR(d)) {                                \
 147                         wcn36xx_warn("Create the debugfs entry failed");\
 148                         dfs->file_##name.dentry = NULL;         \
 149                 }                                               \
 150         } while (0)
 151
 152
 153 void wcn36xx_debugfs_init(struct wcn36xx *wcn)
 154 {
 155         struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
 156
 157         dfs->rootdir = debugfs_create_dir(KBUILD_MODNAME,
 158                                           wcn->hw->wiphy->debugfsdir);
 159         if (IS_ERR(dfs->rootdir)) {
 160                 wcn36xx_warn("Create the debugfs failed\n");
 161                 dfs->rootdir = NULL;
 162         }
 163
 164         ADD_FILE(bmps_switcher, 0600, &fops_wcn36xx_bmps, wcn);
 165         ADD_FILE(dump, 0200, &fops_wcn36xx_dump, wcn);
 166 }
 167
 168 void wcn36xx_debugfs_exit(struct wcn36xx *wcn)
 169 {
 170         struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
 171         debugfs_remove_recursive(dfs->rootdir);
 172 }
 173
 174 #endif /* CONFIG_WCN36XX_DEBUGFS */