LXR linux/drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c

   1/*
   2 * Copyright (c) 2012 Broadcom Corporation
   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#include <linux/debugfs.h>
  17#include <linux/netdevice.h>
  18#include <linux/module.h>
  19#include <linux/devcoredump.h>
  20
  21#include <brcmu_wifi.h>
  22#include <brcmu_utils.h>
  23#include "core.h"
  24#include "bus.h"
  25#include "fweh.h"
  26#include "debug.h"
  27
  28static struct dentry *root_folder;
  29
  30int brcmf_debug_create_memdump(struct brcmf_bus *bus, const void *data,
  31                               size_t len)
  32{
  33        void *dump;
  34        size_t ramsize;
  35        int err;
  36
  37        ramsize = brcmf_bus_get_ramsize(bus);
  38        if (!ramsize)
  39                return -ENOTSUPP;
  40
  41        dump = vzalloc(len + ramsize);
  42        if (!dump)
  43                return -ENOMEM;
  44
  45        memcpy(dump, data, len);
  46        err = brcmf_bus_get_memdump(bus, dump + len, ramsize);
  47        if (err) {
  48                vfree(dump);
  49                return err;
  50        }
  51
  52        dev_coredumpv(bus->dev, dump, len + ramsize, GFP_KERNEL);
  53
  54        return 0;
  55}
  56
  57void brcmf_debugfs_init(void)
  58{
  59        root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL);
  60        if (IS_ERR(root_folder))
  61                root_folder = NULL;
  62}
  63
  64void brcmf_debugfs_exit(void)
  65{
  66        if (!root_folder)
  67                return;
  68
  69        debugfs_remove_recursive(root_folder);
  70        root_folder = NULL;
  71}
  72
  73int brcmf_debug_attach(struct brcmf_pub *drvr)
  74{
  75        struct device *dev = drvr->bus_if->dev;
  76
  77        if (!root_folder)
  78                return -ENODEV;
  79
  80        drvr->dbgfs_dir = debugfs_create_dir(dev_name(dev), root_folder);
  81        return PTR_ERR_OR_ZERO(drvr->dbgfs_dir);
  82}
  83
  84void brcmf_debug_detach(struct brcmf_pub *drvr)
  85{
  86        brcmf_fweh_unregister(drvr, BRCMF_E_PSM_WATCHDOG);
  87
  88        if (!IS_ERR_OR_NULL(drvr->dbgfs_dir))
  89                debugfs_remove_recursive(drvr->dbgfs_dir);
  90}
  91
  92struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
  93{
  94        return drvr->dbgfs_dir;
  95}
  96
  97int brcmf_debugfs_add_entry(struct brcmf_pub *drvr, const char *fn,
  98                            int (*read_fn)(struct seq_file *seq, void *data))
  99{
 100        struct dentry *e;
 101
 102        e = debugfs_create_devm_seqfile(drvr->bus_if->dev, fn,
 103                                        drvr->dbgfs_dir, read_fn);
 104        return PTR_ERR_OR_ZERO(e);
 105}
 106