2 * Copyright (c) 2015,2017 Qualcomm Atheros, Inc.
3 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 #include <linux/devcoredump.h>
21 static int wil_fw_get_crash_dump_bounds(struct wil6210_priv *wil,
22 u32 *out_dump_size, u32 *out_host_min)
25 const struct fw_map *map;
26 u32 host_min, host_max, tmp_max;
31 /* calculate the total size of the unpacked crash dump */
32 BUILD_BUG_ON(ARRAY_SIZE(fw_mapping) == 0);
35 host_max = map->host + (map->to - map->from);
37 for (i = 1; i < ARRAY_SIZE(fw_mapping); i++) {
43 if (map->host < host_min)
46 tmp_max = map->host + (map->to - map->from);
47 if (tmp_max > host_max)
51 *out_dump_size = host_max - host_min;
53 *out_host_min = host_min;
58 int wil_fw_copy_crash_dump(struct wil6210_priv *wil, void *dest, u32 size)
61 const struct fw_map *map;
63 u32 host_min, dump_size, offset, len;
65 if (wil_fw_get_crash_dump_bounds(wil, &dump_size, &host_min)) {
66 wil_err(wil, "fail to obtain crash dump size\n");
70 if (dump_size > size) {
71 wil_err(wil, "not enough space for dump. Need %d have %d\n",
76 set_bit(wil_status_collecting_dumps, wil->status);
77 if (test_bit(wil_status_suspending, wil->status) ||
78 test_bit(wil_status_suspended, wil->status) ||
79 test_bit(wil_status_resetting, wil->status)) {
80 wil_err(wil, "cannot collect fw dump during suspend/reset\n");
81 clear_bit(wil_status_collecting_dumps, wil->status);
85 /* copy to crash dump area */
86 for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
92 data = (void * __force)wil->csr + HOSTADDR(map->host);
93 len = map->to - map->from;
94 offset = map->host - host_min;
97 "fw_copy_crash_dump: - dump %s, size %d, offset %d\n",
98 fw_mapping[i].name, len, offset);
100 wil_memcpy_fromio_32((void * __force)(dest + offset),
101 (const void __iomem * __force)data, len);
104 clear_bit(wil_status_collecting_dumps, wil->status);
109 void wil_fw_core_dump(struct wil6210_priv *wil)
114 if (wil_fw_get_crash_dump_bounds(wil, &fw_dump_size, NULL)) {
115 wil_err(wil, "fail to get fw dump size\n");
119 fw_dump_data = vzalloc(fw_dump_size);
123 if (wil_fw_copy_crash_dump(wil, fw_dump_data, fw_dump_size)) {
127 /* fw_dump_data will be free in device coredump release function
130 dev_coredumpv(wil_to_dev(wil), fw_dump_data, fw_dump_size, GFP_KERNEL);
131 wil_info(wil, "fw core dumped, size %d bytes\n", fw_dump_size);