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
  28 int brcmf_debug_create_memdump(struct brcmf_bus *bus, const void *data,
  29                                size_t len)
  30 {
  31         void *dump;
  32         size_t ramsize;
  33         int err;
  34
  35         ramsize = brcmf_bus_get_ramsize(bus);
  36         if (!ramsize)
  37                 return -ENOTSUPP;
  38
  39         dump = vzalloc(len + ramsize);
  40         if (!dump)
  41                 return -ENOMEM;
  42
  43         if (data && len > 0)
  44                 memcpy(dump, data, len);
  45         err = brcmf_bus_get_memdump(bus, dump + len, ramsize);
  46         if (err) {
  47                 vfree(dump);
  48                 return err;
  49         }
  50
  51         dev_coredumpv(bus->dev, dump, len + ramsize, GFP_KERNEL);
  52
  53         return 0;
  54 }
  55
  56 struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
  57 {
  58         return drvr->wiphy->debugfsdir;
  59 }
  60
  61 int brcmf_debugfs_add_entry(struct brcmf_pub *drvr, const char *fn,
  62                             int (*read_fn)(struct seq_file *seq, void *data))
  63 {
  64         struct dentry *e;
  65
  66         WARN(!drvr->wiphy->debugfsdir, "wiphy not (yet) registered\n");
  67         e = debugfs_create_devm_seqfile(drvr->bus_if->dev, fn,
  68                                         drvr->wiphy->debugfsdir, read_fn);
  69         return PTR_ERR_OR_ZERO(e);
  70 }