9a53d0b6f8
In some cases where the device is stuck, reading from OTP can timeout. As OTP section is known there is no need to read it during device crash dump collection. Adding a new field to struct fw_map to indicate if to include this section in crash dump collection. Signed-off-by: Maya Erez <merez@codeaurora.org> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
/*
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* Copyright (c) 2015,2017 Qualcomm Atheros, Inc.
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* Copyright (c) 2018, The Linux Foundation. All rights reserved.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "wil6210.h"
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#include <linux/devcoredump.h>
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static int wil_fw_get_crash_dump_bounds(struct wil6210_priv *wil,
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u32 *out_dump_size, u32 *out_host_min)
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{
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int i;
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const struct fw_map *map;
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u32 host_min, host_max, tmp_max;
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if (!out_dump_size)
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return -EINVAL;
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/* calculate the total size of the unpacked crash dump */
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BUILD_BUG_ON(ARRAY_SIZE(fw_mapping) == 0);
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map = &fw_mapping[0];
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host_min = map->host;
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host_max = map->host + (map->to - map->from);
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for (i = 1; i < ARRAY_SIZE(fw_mapping); i++) {
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map = &fw_mapping[i];
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if (!map->crash_dump)
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continue;
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if (map->host < host_min)
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host_min = map->host;
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tmp_max = map->host + (map->to - map->from);
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if (tmp_max > host_max)
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host_max = tmp_max;
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}
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*out_dump_size = host_max - host_min;
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if (out_host_min)
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*out_host_min = host_min;
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return 0;
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}
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int wil_fw_copy_crash_dump(struct wil6210_priv *wil, void *dest, u32 size)
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{
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int i;
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const struct fw_map *map;
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void *data;
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u32 host_min, dump_size, offset, len;
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if (wil_fw_get_crash_dump_bounds(wil, &dump_size, &host_min)) {
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wil_err(wil, "fail to obtain crash dump size\n");
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return -EINVAL;
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}
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if (dump_size > size) {
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wil_err(wil, "not enough space for dump. Need %d have %d\n",
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dump_size, size);
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return -EINVAL;
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}
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set_bit(wil_status_collecting_dumps, wil->status);
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if (test_bit(wil_status_suspending, wil->status) ||
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test_bit(wil_status_suspended, wil->status) ||
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test_bit(wil_status_resetting, wil->status)) {
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wil_err(wil, "cannot collect fw dump during suspend/reset\n");
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clear_bit(wil_status_collecting_dumps, wil->status);
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return -EINVAL;
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}
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/* copy to crash dump area */
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for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
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map = &fw_mapping[i];
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if (!map->crash_dump)
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continue;
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data = (void * __force)wil->csr + HOSTADDR(map->host);
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len = map->to - map->from;
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offset = map->host - host_min;
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wil_dbg_misc(wil,
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"fw_copy_crash_dump: - dump %s, size %d, offset %d\n",
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fw_mapping[i].name, len, offset);
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wil_memcpy_fromio_32((void * __force)(dest + offset),
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(const void __iomem * __force)data, len);
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}
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clear_bit(wil_status_collecting_dumps, wil->status);
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return 0;
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}
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void wil_fw_core_dump(struct wil6210_priv *wil)
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{
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void *fw_dump_data;
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u32 fw_dump_size;
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if (wil_fw_get_crash_dump_bounds(wil, &fw_dump_size, NULL)) {
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wil_err(wil, "fail to get fw dump size\n");
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return;
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}
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fw_dump_data = vzalloc(fw_dump_size);
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if (!fw_dump_data)
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return;
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if (wil_fw_copy_crash_dump(wil, fw_dump_data, fw_dump_size)) {
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vfree(fw_dump_data);
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return;
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}
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/* fw_dump_data will be free in device coredump release function
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* after 5 min
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*/
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dev_coredumpv(wil_to_dev(wil), fw_dump_data, fw_dump_size, GFP_KERNEL);
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wil_info(wil, "fw core dumped, size %d bytes\n", fw_dump_size);
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}
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