2 * Copyright (c) 2012 Broadcom Corporation
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.
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.
16 #include <linux/debugfs.h>
17 #include <linux/netdevice.h>
18 #include <linux/module.h>
19 #include <linux/devcoredump.h>
21 #include <brcmu_wifi.h>
22 #include <brcmu_utils.h>
28 static struct dentry *root_folder;
30 static int brcmf_debug_create_memdump(struct brcmf_bus *bus, const void *data,
36 ramsize = brcmf_bus_get_ramsize(bus);
38 dump = vzalloc(len + ramsize);
41 memcpy(dump, data, len);
42 brcmf_bus_get_memdump(bus, dump + len, ramsize);
43 dev_coredumpv(bus->dev, dump, len + ramsize, GFP_KERNEL);
48 static int brcmf_debug_psm_watchdog_notify(struct brcmf_if *ifp,
49 const struct brcmf_event_msg *evtmsg,
52 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
54 return brcmf_debug_create_memdump(ifp->drvr->bus_if, data,
58 void brcmf_debugfs_init(void)
60 root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL);
61 if (IS_ERR(root_folder))
65 void brcmf_debugfs_exit(void)
70 debugfs_remove_recursive(root_folder);
74 int brcmf_debug_attach(struct brcmf_pub *drvr)
76 struct device *dev = drvr->bus_if->dev;
81 drvr->dbgfs_dir = debugfs_create_dir(dev_name(dev), root_folder);
82 if (IS_ERR(drvr->dbgfs_dir))
83 return PTR_ERR(drvr->dbgfs_dir);
86 return brcmf_fweh_register(drvr, BRCMF_E_PSM_WATCHDOG,
87 brcmf_debug_psm_watchdog_notify);
90 void brcmf_debug_detach(struct brcmf_pub *drvr)
92 brcmf_fweh_unregister(drvr, BRCMF_E_PSM_WATCHDOG);
94 if (!IS_ERR_OR_NULL(drvr->dbgfs_dir))
95 debugfs_remove_recursive(drvr->dbgfs_dir);
98 struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
100 return drvr->dbgfs_dir;
103 int brcmf_debugfs_add_entry(struct brcmf_pub *drvr, const char *fn,
104 int (*read_fn)(struct seq_file *seq, void *data))
108 e = debugfs_create_devm_seqfile(drvr->bus_if->dev, fn,
109 drvr->dbgfs_dir, read_fn);
110 return PTR_ERR_OR_ZERO(e);