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

Source file repositories/reference/linux-study-clean/drivers/net/wireless/ath/wil6210/wil_crash_dump.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/ath/wil6210/wil_crash_dump.c
Extension
.c
Size
2845 bytes
Lines
123
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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);
}

Annotation

Implementation Notes