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// SPDX-License-Identifier: ISC
/*
* Copyright (c) 2015,2017 Qualcomm Atheros, Inc.
* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
*/
#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->crash_dump)
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;
}
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;
}
down_write(&wil->mem_lock);
if (test_bit(wil_status_suspending, wil->status) ||
test_bit(wil_status_suspended, wil->status)) {
wil_err(wil,
"suspend/resume in progress. cannot copy crash dump\n");
up_write(&wil->mem_lock);
return -EBUSY;
}
/* copy to crash dump area */
for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
map = &fw_mapping[i];
if (!map->crash_dump)
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);
}
up_write(&wil->mem_lock);
return 0;
}
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);
}
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