projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 7dc47258 VK |
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 | ||
| 20 | static 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->host < host_min) | |
| 40 | host_min = map->host; | |
| 41 | ||
| 42 | tmp_max = map->host + (map->to - map->from); | |
| 43 | if (tmp_max > host_max) | |
| 44 | host_max = tmp_max; | |
| 45 | } | |
| 46 | ||
| 47 | *out_dump_size = host_max - host_min; | |
| 48 | if (out_host_min) | |
| 49 | *out_host_min = host_min; | |
| 50 | ||
| 51 | return 0; | |
| 52 | } | |
| 53 | ||
| ea3ade75 | 54 | int wil_fw_copy_crash_dump(struct wil6210_priv *wil, void *dest, u32 size) |
| 7dc47258 VK |
55 | { |
| 56 | int i; | |
| 57 | const struct fw_map *map; | |
| 58 | void *data; | |
| 59 | u32 host_min, dump_size, offset, len; | |
| 60 | ||
| 61 | if (wil_fw_get_crash_dump_bounds(wil, &dump_size, &host_min)) { | |
| 62 | wil_err(wil, "%s: fail to obtain crash dump size\n", __func__); | |
| 63 | return -EINVAL; | |
| 64 | } | |
| 65 | ||
| 66 | if (dump_size > size) { | |
| 67 | wil_err(wil, "%s: not enough space for dump. Need %d have %d\n", | |
| 68 | __func__, dump_size, size); | |
| 69 | return -EINVAL; | |
| 70 | } | |
| 71 | ||
| 72 | /* copy to crash dump area */ | |
| 73 | for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) { | |
| 74 | map = &fw_mapping[i]; | |
| 75 | ||
| 76 | data = (void * __force)wil->csr + HOSTADDR(map->host); | |
| 77 | len = map->to - map->from; | |
| 78 | offset = map->host - host_min; | |
| 79 | ||
| 80 | wil_dbg_misc(wil, "%s() - dump %s, size %d, offset %d\n", | |
| 81 | __func__, fw_mapping[i].name, len, offset); | |
| 82 | ||
| 83 | wil_memcpy_fromio_32((void * __force)(dest + offset), | |
| 84 | (const void __iomem * __force)data, len); | |
| 85 | } | |
| 86 | ||
| 87 | return 0; | |
| 88 | } | |
| 89 | ||
| 90 | void wil_fw_core_dump(struct wil6210_priv *wil) | |
| 91 | { | |
| 92 | void *fw_dump_data; | |
| 93 | u32 fw_dump_size; | |
| 94 | ||
| 95 | if (wil_fw_get_crash_dump_bounds(wil, &fw_dump_size, NULL)) { | |
| 96 | wil_err(wil, "%s: fail to get fw dump size\n", __func__); | |
| 97 | return; | |
| 98 | } | |
| 99 | ||
| 100 | fw_dump_data = vzalloc(fw_dump_size); | |
| 101 | if (!fw_dump_data) | |
| 102 | return; | |
| 103 | ||
| 104 | if (wil_fw_copy_crash_dump(wil, fw_dump_data, fw_dump_size)) { | |
| 105 | vfree(fw_dump_data); | |
| 106 | return; | |
| 107 | } | |
| 108 | /* fw_dump_data will be free in device coredump release function | |
| 109 | * after 5 min | |
| 110 | */ | |
| 111 | dev_coredumpv(wil_to_dev(wil), fw_dump_data, fw_dump_size, GFP_KERNEL); | |
| 112 | wil_info(wil, "%s: fw core dumped, size %d bytes\n", __func__, | |
| 113 | fw_dump_size); | |
| 114 | } |