kernel/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 = container_of((void *)vif_priv,
  37                                    struct ieee80211_vif,
  38                                    drv_priv);
  39                         if (NL80211_IFTYPE_STATION == vif->type) {
  40                                 if (vif_priv->pw_state == WCN36XX_BMPS)
  41                                         buf[0] = '1';
  42                                 else
  43                                         buf[0] = '0';
  44                                 break;
  45                         }
  46         }
  47         buf[1] = '\n';
  48         buf[2] = 0x00;
  49
  50         return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
  51 }
  52
  53 static ssize_t write_file_bool_bmps(struct file *file,
  54                                     const char __user *user_buf,
  55                                     size_t count, loff_t *ppos)
  56 {
  57         struct wcn36xx *wcn = file->private_data;
  58         struct wcn36xx_vif *vif_priv = NULL;
  59         struct ieee80211_vif *vif = NULL;
  60
  61         char buf[32];
  62         int buf_size;
  63
  64         buf_size = min(count, (sizeof(buf)-1));
  65         if (copy_from_user(buf, user_buf, buf_size))
  66                 return -EFAULT;
  67
  68         switch (buf[0]) {
  69         case 'y':
  70         case 'Y':
  71         case '1':
  72                 list_for_each_entry(vif_priv, &wcn->vif_list, list) {
  73                         vif = container_of((void *)vif_priv,
  74                                    struct ieee80211_vif,
  75                                    drv_priv);
  76                         if (NL80211_IFTYPE_STATION == vif->type) {
  77                                 wcn36xx_enable_keep_alive_null_packet(wcn, vif);
  78                                 wcn36xx_pmc_enter_bmps_state(wcn, vif);
  79                         }
  80                 }
  81                 break;
  82         case 'n':
  83         case 'N':
  84         case '0':
  85                 list_for_each_entry(vif_priv, &wcn->vif_list, list) {
  86                         vif = container_of((void *)vif_priv,
  87                                    struct ieee80211_vif,
  88                                    drv_priv);
  89                         if (NL80211_IFTYPE_STATION == vif->type)
  90                                 wcn36xx_pmc_exit_bmps_state(wcn, vif);
  91                 }
  92                 break;
  93         }
  94
  95         return count;
  96 }
  97
  98 static const struct file_operations fops_wcn36xx_bmps = {
  99         .open = simple_open,
 100         .read  =       read_file_bool_bmps,
 101         .write =       write_file_bool_bmps,
 102 };
 103
 104 static ssize_t write_file_dump(struct file *file,
 105                                     const char __user *user_buf,
 106                                     size_t count, loff_t *ppos)
 107 {
 108         struct wcn36xx *wcn = file->private_data;
 109         char buf[255], *tmp;
 110         int buf_size;
 111         u32 arg[WCN36xx_MAX_DUMP_ARGS];
 112         int i;
 113
 114         memset(buf, 0, sizeof(buf));
 115         memset(arg, 0, sizeof(arg));
 116
 117         buf_size = min(count, (sizeof(buf) - 1));
 118         if (copy_from_user(buf, user_buf, buf_size))
 119                 return -EFAULT;
 120
 121         tmp = buf;
 122
 123         for (i = 0; i < WCN36xx_MAX_DUMP_ARGS; i++) {
 124                 char *begin;
 125                 begin = strsep(&tmp, " ");
 126                 if (begin == NULL)
 127                         break;
 128
 129                 if (kstrtou32(begin, 0, &arg[i]) != 0)
 130                         break;
 131         }
 132
 133         wcn36xx_info("DUMP args is %d %d %d %d %d\n", arg[0], arg[1], arg[2],
 134                      arg[3], arg[4]);
 135         wcn36xx_smd_dump_cmd_req(wcn, arg[0], arg[1], arg[2], arg[3], arg[4]);
 136
 137         return count;
 138 }
 139
 140 static const struct file_operations fops_wcn36xx_dump = {
 141         .open = simple_open,
 142         .write =       write_file_dump,
 143 };
 144
 145 #define ADD_FILE(name, mode, fop, priv_data)            \
 146         do {                                                    \
 147                 struct dentry *d;                               \
 148                 d = debugfs_create_file(__stringify(name),      \
 149                                         mode, dfs->rootdir,     \
 150                                         priv_data, fop);        \
 151                 dfs->file_##name.dentry = d;                    \
 152                 if (IS_ERR(d)) {                                \
 153                         wcn36xx_warn("Create the debugfs entry failed");\
 154                         dfs->file_##name.dentry = NULL;         \
 155                 }                                               \
 156         } while (0)
 157
 158
 159 void wcn36xx_debugfs_init(struct wcn36xx *wcn)
 160 {
 161         struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
 162
 163         dfs->rootdir = debugfs_create_dir(KBUILD_MODNAME,
 164                                           wcn->hw->wiphy->debugfsdir);
 165         if (IS_ERR(dfs->rootdir)) {
 166                 wcn36xx_warn("Create the debugfs failed\n");
 167                 dfs->rootdir = NULL;
 168         }
 169
 170         ADD_FILE(bmps_switcher, S_IRUSR | S_IWUSR,
 171                  &fops_wcn36xx_bmps, wcn);
 172         ADD_FILE(dump, S_IWUSR, &fops_wcn36xx_dump, wcn);
 173 }
 174
 175 void wcn36xx_debugfs_exit(struct wcn36xx *wcn)
 176 {
 177         struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
 178         debugfs_remove_recursive(dfs->rootdir);
 179 }
 180
 181 #endif /* CONFIG_WCN36XX_DEBUGFS */