nexmon – Blame information for rev 1

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1 office 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 static struct dentry *root_folder;
29  
30 static int 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  
57 static int brcmf_debug_psm_watchdog_notify(struct brcmf_if *ifp,
58 const struct brcmf_event_msg *evtmsg,
59 void *data)
60 {
61 brcmf_dbg(TRACE, "enter: bsscfgidx=%d\n", ifp->bsscfgidx);
62  
63 return brcmf_debug_create_memdump(ifp->drvr->bus_if, data,
64 evtmsg->datalen);
65 }
66  
67 void brcmf_debugfs_init(void)
68 {
69 root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL);
70 if (IS_ERR(root_folder))
71 root_folder = NULL;
72 }
73  
74 void brcmf_debugfs_exit(void)
75 {
76 if (!root_folder)
77 return;
78  
79 debugfs_remove_recursive(root_folder);
80 root_folder = NULL;
81 }
82  
83 int brcmf_debug_attach(struct brcmf_pub *drvr)
84 {
85 struct device *dev = drvr->bus_if->dev;
86  
87 if (!root_folder)
88 return -ENODEV;
89  
90 drvr->dbgfs_dir = debugfs_create_dir(dev_name(dev), root_folder);
91 if (IS_ERR(drvr->dbgfs_dir))
92 return PTR_ERR(drvr->dbgfs_dir);
93  
94  
95 return brcmf_fweh_register(drvr, BRCMF_E_PSM_WATCHDOG,
96 brcmf_debug_psm_watchdog_notify);
97 }
98  
99 void brcmf_debug_detach(struct brcmf_pub *drvr)
100 {
101 brcmf_fweh_unregister(drvr, BRCMF_E_PSM_WATCHDOG);
102  
103 if (!IS_ERR_OR_NULL(drvr->dbgfs_dir))
104 debugfs_remove_recursive(drvr->dbgfs_dir);
105 }
106  
107 struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
108 {
109 return drvr->dbgfs_dir;
110 }
111  
112 int brcmf_debugfs_add_entry(struct brcmf_pub *drvr, const char *fn,
113 int (*read_fn)(struct seq_file *seq, void *data))
114 {
115 struct dentry *e;
116  
117 e = debugfs_create_devm_seqfile(drvr->bus_if->dev, fn,
118 drvr->dbgfs_dir, read_fn);
119 return PTR_ERR_OR_ZERO(e);
120 }