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 	memcpy(dump, data, len);
44 	err = brcmf_bus_get_memdump(bus, dump + len, ramsize);
45 	if (err) {
46 		vfree(dump);
47 		return err;
48 	}
49 
50 	dev_coredumpv(bus->dev, dump, len + ramsize, GFP_KERNEL);
51 
52 	return 0;
53 }
54 
55 struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
56 {
57 	return drvr->wiphy->debugfsdir;
58 }
59 
60 int brcmf_debugfs_add_entry(struct brcmf_pub *drvr, const char *fn,
61 			    int (*read_fn)(struct seq_file *seq, void *data))
62 {
63 	struct dentry *e;
64 
65 	WARN(!drvr->wiphy->debugfsdir, "wiphy not (yet) registered\n");
66 	e = debugfs_create_devm_seqfile(drvr->bus_if->dev, fn,
67 					drvr->wiphy->debugfsdir, read_fn);
68 	return PTR_ERR_OR_ZERO(e);
69 }
70