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 } 71