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Commit b8a29990 authored by Harshdeep Dhatt's avatar Harshdeep Dhatt
Browse files

msm: kgsl: Dump shader blocks through AHB 



Dump shader blocks through AHB if crashdumper couldn't
run or finish successfully. This helps debugging pagefaults.

Change-Id: Ic9c647beb7e28accd2bfab637f4691f781f64f5a
Signed-off-by: default avatarHarshdeep Dhatt <hdhatt@codeaurora.org>
parent 63ebb55f

drivers/gpu/msm/adreno_a6xx_snapshot.c

+46 −4
Original line number Diff line number Diff line
@@ -708,6 +708,49 @@ static size_t a6xx_snapshot_pre_crashdump_regs(struct kgsl_device *device, 
	return kgsl_snapshot_dump_registers(device, buf, remain, &pre_cdregs);

}



static size_t a6xx_legacy_snapshot_shader(struct kgsl_device *device,

				u8 *buf, size_t remain, void *priv)

{

	struct kgsl_snapshot_shader *header =

		(struct kgsl_snapshot_shader *) buf;

	struct a6xx_shader_block_info *info =

		(struct a6xx_shader_block_info *) priv;

	struct a6xx_shader_block *block = info->block;

	unsigned int *data = (unsigned int *)(buf + sizeof(*header));

	unsigned int read_sel, val;

	int i;



	if (!device->snapshot_legacy)

		return 0;



	if (remain < SHADER_SECTION_SZ(block->sz)) {

		SNAPSHOT_ERR_NOMEM(device, "SHADER MEMORY");

		return 0;

	}



	header->type = block->statetype;

	header->index = info->bank;

	header->size = block->sz;



	read_sel = (block->statetype << A6XX_SHADER_STATETYPE_SHIFT) |

		info->bank;

	kgsl_regwrite(device, A6XX_HLSQ_DBG_READ_SEL, read_sel);



	/*

	 * An explicit barrier is needed so that reads do not happen before

	 * the register write.

	 */

	mb();



	for (i = 0; i < block->sz; i++) {

		kgsl_regread(device, (A6XX_HLSQ_DBG_AHB_READ_APERTURE + i),

			&val);

		*data++ = val;

	}



	return SHADER_SECTION_SZ(block->sz);

}



static size_t a6xx_snapshot_shader_memory(struct kgsl_device *device,

		u8 *buf, size_t remain, void *priv)

{
@@ -718,6 +761,9 @@ static size_t a6xx_snapshot_shader_memory(struct kgsl_device *device, 
	struct a6xx_shader_block *block = info->block;

	unsigned int *data = (unsigned int *) (buf + sizeof(*header));



	if (!crash_dump_valid)

		return a6xx_legacy_snapshot_shader(device, buf, remain, priv);



	if (remain < SHADER_SECTION_SZ(block->sz)) {

		SNAPSHOT_ERR_NOMEM(device, "SHADER MEMORY");

		return 0;
@@ -739,10 +785,6 @@ static void a6xx_snapshot_shader(struct kgsl_device *device, 
	unsigned int i, j;

	struct a6xx_shader_block_info info;



	/* Shader blocks can only be read by the crash dumper */

	if (!crash_dump_valid)

		return;



	for (i = 0; i < ARRAY_SIZE(a6xx_shader_blocks); i++) {

		for (j = 0; j < A6XX_NUM_SHADER_BANKS; j++) {

			info.block = &a6xx_shader_blocks[i];