2 * Copyright (c) 2015,2017 Qualcomm Atheros, Inc.
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
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #include <linux/devcoredump.h>
20 static int wil_fw_get_crash_dump_bounds(struct wil6210_priv *wil,
21 u32 *out_dump_size, u32 *out_host_min)
24 const struct fw_map *map;
25 u32 host_min, host_max, tmp_max;
30 /* calculate the total size of the unpacked crash dump */
31 BUILD_BUG_ON(ARRAY_SIZE(fw_mapping) == 0);
34 host_max = map->host + (map->to - map->from);
36 for (i = 1; i < ARRAY_SIZE(fw_mapping); i++) {
42 if (map->host < host_min)
45 tmp_max = map->host + (map->to - map->from);
46 if (tmp_max > host_max)
50 *out_dump_size = host_max - host_min;
52 *out_host_min = host_min;
57 int wil_fw_copy_crash_dump(struct wil6210_priv *wil, void *dest, u32 size)
60 const struct fw_map *map;
62 u32 host_min, dump_size, offset, len;
64 if (wil_fw_get_crash_dump_bounds(wil, &dump_size, &host_min)) {
65 wil_err(wil, "fail to obtain crash dump size\n");
69 if (dump_size > size) {
70 wil_err(wil, "not enough space for dump. Need %d have %d\n",
75 /* copy to crash dump area */
76 for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
82 data = (void * __force)wil->csr + HOSTADDR(map->host);
83 len = map->to - map->from;
84 offset = map->host - host_min;
87 "fw_copy_crash_dump: - dump %s, size %d, offset %d\n",
88 fw_mapping[i].name, len, offset);
90 wil_memcpy_fromio_32((void * __force)(dest + offset),
91 (const void __iomem * __force)data, len);
97 void wil_fw_core_dump(struct wil6210_priv *wil)
102 if (wil_fw_get_crash_dump_bounds(wil, &fw_dump_size, NULL)) {
103 wil_err(wil, "fail to get fw dump size\n");
107 fw_dump_data = vzalloc(fw_dump_size);
111 if (wil_fw_copy_crash_dump(wil, fw_dump_data, fw_dump_size)) {
115 /* fw_dump_data will be free in device coredump release function
118 dev_coredumpv(wil_to_dev(wil), fw_dump_data, fw_dump_size, GFP_KERNEL);
119 wil_info(wil, "fw core dumped, size %d bytes\n", fw_dump_size);