Loading...
1// SPDX-License-Identifier: ISC
2/*
3 * Copyright (c) 2015,2017 Qualcomm Atheros, Inc.
4 * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
5 */
6
7#include "wil6210.h"
8#include <linux/devcoredump.h>
9
10static int wil_fw_get_crash_dump_bounds(struct wil6210_priv *wil,
11 u32 *out_dump_size, u32 *out_host_min)
12{
13 int i;
14 const struct fw_map *map;
15 u32 host_min, host_max, tmp_max;
16
17 if (!out_dump_size)
18 return -EINVAL;
19
20 /* calculate the total size of the unpacked crash dump */
21 BUILD_BUG_ON(ARRAY_SIZE(fw_mapping) == 0);
22 map = &fw_mapping[0];
23 host_min = map->host;
24 host_max = map->host + (map->to - map->from);
25
26 for (i = 1; i < ARRAY_SIZE(fw_mapping); i++) {
27 map = &fw_mapping[i];
28
29 if (!map->crash_dump)
30 continue;
31
32 if (map->host < host_min)
33 host_min = map->host;
34
35 tmp_max = map->host + (map->to - map->from);
36 if (tmp_max > host_max)
37 host_max = tmp_max;
38 }
39
40 *out_dump_size = host_max - host_min;
41 if (out_host_min)
42 *out_host_min = host_min;
43
44 return 0;
45}
46
47int wil_fw_copy_crash_dump(struct wil6210_priv *wil, void *dest, u32 size)
48{
49 int i;
50 const struct fw_map *map;
51 void *data;
52 u32 host_min, dump_size, offset, len;
53
54 if (wil_fw_get_crash_dump_bounds(wil, &dump_size, &host_min)) {
55 wil_err(wil, "fail to obtain crash dump size\n");
56 return -EINVAL;
57 }
58
59 if (dump_size > size) {
60 wil_err(wil, "not enough space for dump. Need %d have %d\n",
61 dump_size, size);
62 return -EINVAL;
63 }
64
65 down_write(&wil->mem_lock);
66
67 if (test_bit(wil_status_suspending, wil->status) ||
68 test_bit(wil_status_suspended, wil->status)) {
69 wil_err(wil,
70 "suspend/resume in progress. cannot copy crash dump\n");
71 up_write(&wil->mem_lock);
72 return -EBUSY;
73 }
74
75 /* copy to crash dump area */
76 for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
77 map = &fw_mapping[i];
78
79 if (!map->crash_dump)
80 continue;
81
82 data = (void * __force)wil->csr + HOSTADDR(map->host);
83 len = map->to - map->from;
84 offset = map->host - host_min;
85
86 wil_dbg_misc(wil,
87 "fw_copy_crash_dump: - dump %s, size %d, offset %d\n",
88 fw_mapping[i].name, len, offset);
89
90 wil_memcpy_fromio_32((void * __force)(dest + offset),
91 (const void __iomem * __force)data, len);
92 }
93
94 up_write(&wil->mem_lock);
95
96 return 0;
97}
98
99void wil_fw_core_dump(struct wil6210_priv *wil)
100{
101 void *fw_dump_data;
102 u32 fw_dump_size;
103
104 if (wil_fw_get_crash_dump_bounds(wil, &fw_dump_size, NULL)) {
105 wil_err(wil, "fail to get fw dump size\n");
106 return;
107 }
108
109 fw_dump_data = vzalloc(fw_dump_size);
110 if (!fw_dump_data)
111 return;
112
113 if (wil_fw_copy_crash_dump(wil, fw_dump_data, fw_dump_size)) {
114 vfree(fw_dump_data);
115 return;
116 }
117 /* fw_dump_data will be free in device coredump release function
118 * after 5 min
119 */
120 dev_coredumpv(wil_to_dev(wil), fw_dump_data, fw_dump_size, GFP_KERNEL);
121 wil_info(wil, "fw core dumped, size %d bytes\n", fw_dump_size);
122}
1/*
2 * Copyright (c) 2015 Qualcomm Atheros, Inc.
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
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.
15 */
16
17#include "wil6210.h"
18#include <linux/devcoredump.h>
19
20static int wil_fw_get_crash_dump_bounds(struct wil6210_priv *wil,
21 u32 *out_dump_size, u32 *out_host_min)
22{
23 int i;
24 const struct fw_map *map;
25 u32 host_min, host_max, tmp_max;
26
27 if (!out_dump_size)
28 return -EINVAL;
29
30 /* calculate the total size of the unpacked crash dump */
31 BUILD_BUG_ON(ARRAY_SIZE(fw_mapping) == 0);
32 map = &fw_mapping[0];
33 host_min = map->host;
34 host_max = map->host + (map->to - map->from);
35
36 for (i = 1; i < ARRAY_SIZE(fw_mapping); i++) {
37 map = &fw_mapping[i];
38
39 if (!map->fw)
40 continue;
41
42 if (map->host < host_min)
43 host_min = map->host;
44
45 tmp_max = map->host + (map->to - map->from);
46 if (tmp_max > host_max)
47 host_max = tmp_max;
48 }
49
50 *out_dump_size = host_max - host_min;
51 if (out_host_min)
52 *out_host_min = host_min;
53
54 return 0;
55}
56
57int wil_fw_copy_crash_dump(struct wil6210_priv *wil, void *dest, u32 size)
58{
59 int i;
60 const struct fw_map *map;
61 void *data;
62 u32 host_min, dump_size, offset, len;
63
64 if (wil_fw_get_crash_dump_bounds(wil, &dump_size, &host_min)) {
65 wil_err(wil, "%s: fail to obtain crash dump size\n", __func__);
66 return -EINVAL;
67 }
68
69 if (dump_size > size) {
70 wil_err(wil, "%s: not enough space for dump. Need %d have %d\n",
71 __func__, dump_size, size);
72 return -EINVAL;
73 }
74
75 /* copy to crash dump area */
76 for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
77 map = &fw_mapping[i];
78
79 if (!map->fw)
80 continue;
81
82 data = (void * __force)wil->csr + HOSTADDR(map->host);
83 len = map->to - map->from;
84 offset = map->host - host_min;
85
86 wil_dbg_misc(wil, "%s() - dump %s, size %d, offset %d\n",
87 __func__, fw_mapping[i].name, len, offset);
88
89 wil_memcpy_fromio_32((void * __force)(dest + offset),
90 (const void __iomem * __force)data, len);
91 }
92
93 return 0;
94}
95
96void wil_fw_core_dump(struct wil6210_priv *wil)
97{
98 void *fw_dump_data;
99 u32 fw_dump_size;
100
101 if (wil_fw_get_crash_dump_bounds(wil, &fw_dump_size, NULL)) {
102 wil_err(wil, "%s: fail to get fw dump size\n", __func__);
103 return;
104 }
105
106 fw_dump_data = vzalloc(fw_dump_size);
107 if (!fw_dump_data)
108 return;
109
110 if (wil_fw_copy_crash_dump(wil, fw_dump_data, fw_dump_size)) {
111 vfree(fw_dump_data);
112 return;
113 }
114 /* fw_dump_data will be free in device coredump release function
115 * after 5 min
116 */
117 dev_coredumpv(wil_to_dev(wil), fw_dump_data, fw_dump_size, GFP_KERNEL);
118 wil_info(wil, "%s: fw core dumped, size %d bytes\n", __func__,
119 fw_dump_size);
120}