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

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (c) 2012 Broadcom Corporation
   4  */
   5 #include <linux/debugfs.h>
   6 #include <linux/netdevice.h>
   7 #include <linux/module.h>
   8 #include <linux/devcoredump.h>
   9
  10 #include <brcmu_wifi.h>
  11 #include <brcmu_utils.h>
  12 #include "core.h"
  13 #include "bus.h"
  14 #include "fweh.h"
  15 #include "debug.h"
  16
  17 int brcmf_debug_create_memdump(struct brcmf_bus *bus, const void *data,
  18                                size_t len)
  19 {
  20         void *dump;
  21         size_t ramsize;
  22         int err;
  23
  24         ramsize = brcmf_bus_get_ramsize(bus);
  25         if (!ramsize)
  26                 return -ENOTSUPP;
  27
  28         dump = vzalloc(len + ramsize);
  29         if (!dump)
  30                 return -ENOMEM;
  31
  32         if (data && len > 0)
  33                 memcpy(dump, data, len);
  34         err = brcmf_bus_get_memdump(bus, dump + len, ramsize);
  35         if (err) {
  36                 vfree(dump);
  37                 return err;
  38         }
  39
  40         dev_coredumpv(bus->dev, dump, len + ramsize, GFP_KERNEL);
  41
  42         return 0;
  43 }
  44
  45 struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
  46 {
  47         return drvr->wiphy->debugfsdir;
  48 }
  49
  50 void brcmf_debugfs_add_entry(struct brcmf_pub *drvr, const char *fn,
  51                             int (*read_fn)(struct seq_file *seq, void *data))
  52 {
  53         WARN(!drvr->wiphy->debugfsdir, "wiphy not (yet) registered\n");
  54         debugfs_create_devm_seqfile(drvr->bus_if->dev, fn,
  55                                     drvr->wiphy->debugfsdir, read_fn);
  56 }