cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/wireless/ath/wil6210/wil_crash_dump.c

/*
 * Copyright (c) 2015,2017 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "wil6210.h"
#include <linux/devcoredump.h>


static int wil_fw_get_crash_dump_bounds(struct wil6210_priv *wil, u32 *out_dump_size, u32 *out_host_min) { int i; const struct fw_map *map; u32 host_min, host_max, tmp_max; if (!out_dump_size) return -EINVAL; /* calculate the total size of the unpacked crash dump */ BUILD_BUG_ON(ARRAY_SIZE(fw_mapping) == 0); map = &fw_mapping[0]; host_min = map->host; host_max = map->host + (map->to - map->from); for (i = 1; i < ARRAY_SIZE(fw_mapping); i++) { map = &fw_mapping[i]; if (!map->fw) continue; if (map->host < host_min) host_min = map->host; tmp_max = map->host + (map->to - map->from); if (tmp_max > host_max) host_max = tmp_max; } *out_dump_size = host_max - host_min; if (out_host_min) *out_host_min = host_min; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Vladimir Kondratiev17095.51%150.00%
Lior David84.49%150.00%
Total178100.00%2100.00%


int wil_fw_copy_crash_dump(struct wil6210_priv *wil, void *dest, u32 size) { int i; const struct fw_map *map; void *data; u32 host_min, dump_size, offset, len; if (wil_fw_get_crash_dump_bounds(wil, &dump_size, &host_min)) { wil_err(wil, "fail to obtain crash dump size\n"); return -EINVAL; } if (dump_size > size) { wil_err(wil, "not enough space for dump. Need %d have %d\n", dump_size, size); return -EINVAL; } /* copy to crash dump area */ for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) { map = &fw_mapping[i]; if (!map->fw) continue; data = (void * __force)wil->csr + HOSTADDR(map->host); len = map->to - map->from; offset = map->host - host_min; wil_dbg_misc(wil, "fw_copy_crash_dump: - dump %s, size %d, offset %d\n", fw_mapping[i].name, len, offset); wil_memcpy_fromio_32((void * __force)(dest + offset), (const void __iomem * __force)data, len); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Vladimir Kondratiev19494.63%133.33%
Lior David83.90%133.33%
Lazar Alexei31.46%133.33%
Total205100.00%3100.00%


void wil_fw_core_dump(struct wil6210_priv *wil) { void *fw_dump_data; u32 fw_dump_size; if (wil_fw_get_crash_dump_bounds(wil, &fw_dump_size, NULL)) { wil_err(wil, "fail to get fw dump size\n"); return; } fw_dump_data = vzalloc(fw_dump_size); if (!fw_dump_data) return; if (wil_fw_copy_crash_dump(wil, fw_dump_data, fw_dump_size)) { vfree(fw_dump_data); return; } /* fw_dump_data will be free in device coredump release function * after 5 min */ dev_coredumpv(wil_to_dev(wil), fw_dump_data, fw_dump_size, GFP_KERNEL); wil_info(wil, "fw core dumped, size %d bytes\n", fw_dump_size); }

Contributors

PersonTokensPropCommitsCommitProp
Vladimir Kondratiev9397.89%150.00%
Lazar Alexei22.11%150.00%
Total95100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Vladimir Kondratiev46395.46%133.33%
Lior David163.30%133.33%
Lazar Alexei61.24%133.33%
Total485100.00%3100.00%
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