drivers/net/wireless/brcm80211/brcmsmac/debug.c

   1 /*
   2  * Copyright (c) 2012 Broadcom Corporation
   3  * Copyright (c) 2012 Canonical Ltd.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  12  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  14  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  15  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #include <linux/debugfs.h>
  18 #include <linux/if_ether.h>
  19 #include <linux/if.h>
  20 #include <linux/net.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/ieee80211.h>
  23 #include <linux/module.h>
  24 #include <net/mac80211.h>
  25
  26 #include <defs.h>
  27 #include <brcmu_wifi.h>
  28 #include <brcmu_utils.h>
  29 #include "types.h"
  30 #include "main.h"
  31 #include "debug.h"
  32 #include "brcms_trace_events.h"
  33
  34 static struct dentry *root_folder;
  35
  36 void brcms_debugfs_init(void)
  37 {
  38         root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL);
  39         if (IS_ERR(root_folder))
  40                 root_folder = NULL;
  41 }
  42
  43 void brcms_debugfs_exit(void)
  44 {
  45         if (!root_folder)
  46                 return;
  47
  48         debugfs_remove_recursive(root_folder);
  49         root_folder = NULL;
  50 }
  51
  52 int brcms_debugfs_attach(struct brcms_pub *drvr)
  53 {
  54         if (!root_folder)
  55                 return -ENODEV;
  56
  57         drvr->dbgfs_dir = debugfs_create_dir(
  58                  dev_name(&drvr->wlc->hw->d11core->dev), root_folder);
  59         return PTR_ERR_OR_ZERO(drvr->dbgfs_dir);
  60 }
  61
  62 void brcms_debugfs_detach(struct brcms_pub *drvr)
  63 {
  64         if (!IS_ERR_OR_NULL(drvr->dbgfs_dir))
  65                 debugfs_remove_recursive(drvr->dbgfs_dir);
  66 }
  67
  68 struct dentry *brcms_debugfs_get_devdir(struct brcms_pub *drvr)
  69 {
  70         return drvr->dbgfs_dir;
  71 }
  72
  73 static
  74 ssize_t brcms_debugfs_hardware_read(struct file *f, char __user *data,
  75                                         size_t count, loff_t *ppos)
  76 {
  77         char buf[128];
  78         int res;
  79         struct brcms_pub *drvr = f->private_data;
  80
  81         /* only allow read from start */
  82         if (*ppos > 0)
  83                 return 0;
  84
  85         res = scnprintf(buf, sizeof(buf),
  86                 "board vendor: %x\n"
  87                 "board type: %x\n"
  88                 "board revision: %x\n"
  89                 "board flags: %x\n"
  90                 "board flags2: %x\n"
  91                 "firmware revision: %x\n",
  92                 drvr->wlc->hw->d11core->bus->boardinfo.vendor,
  93                 drvr->wlc->hw->d11core->bus->boardinfo.type,
  94                 drvr->wlc->hw->boardrev,
  95                 drvr->wlc->hw->boardflags,
  96                 drvr->wlc->hw->boardflags2,
  97                 drvr->wlc->ucode_rev
  98                 );
  99
 100         return simple_read_from_buffer(data, count, ppos, buf, res);
 101 }
 102
 103 static const struct file_operations brcms_debugfs_hardware_ops = {
 104         .owner = THIS_MODULE,
 105         .open = simple_open,
 106         .read = brcms_debugfs_hardware_read
 107 };
 108
 109 void brcms_debugfs_create_files(struct brcms_pub *drvr)
 110 {
 111         struct dentry *dentry = drvr->dbgfs_dir;
 112
 113         if (!IS_ERR_OR_NULL(dentry))
 114                 debugfs_create_file("hardware", S_IRUGO, dentry,
 115                                     drvr, &brcms_debugfs_hardware_ops);
 116 }
 117
 118 #define __brcms_fn(fn)                                          \
 119 void __brcms_ ##fn(struct device *dev, const char *fmt, ...)    \
 120 {                                                               \
 121         struct va_format vaf = {                                \
 122                 .fmt = fmt,                                     \
 123         };                                                      \
 124         va_list args;                                           \
 125                                                                 \
 126         va_start(args, fmt);                                    \
 127         vaf.va = &args;                                         \
 128         dev_ ##fn(dev, "%pV", &vaf);                            \
 129         trace_brcms_ ##fn(&vaf);                                \
 130         va_end(args);                                           \
 131 }
 132
 133 __brcms_fn(info)
 134 __brcms_fn(warn)
 135 __brcms_fn(err)
 136 __brcms_fn(crit)
 137
 138 #if defined(CONFIG_BRCMDBG) || defined(CONFIG_BRCM_TRACING)
 139 void __brcms_dbg(struct device *dev, u32 level, const char *func,
 140                  const char *fmt, ...)
 141 {
 142         struct va_format vaf = {
 143                 .fmt = fmt,
 144         };
 145         va_list args;
 146
 147         va_start(args, fmt);
 148         vaf.va = &args;
 149 #ifdef CONFIG_BRCMDBG
 150         if ((brcm_msg_level & level) && net_ratelimit())
 151                 dev_err(dev, "%s %pV", func, &vaf);
 152 #endif
 153         trace_brcms_dbg(level, func, &vaf);
 154         va_end(args);
 155 }
 156 #endif