Commit cbb8f989 authored by John Clements's avatar John Clements Committed by Alex Deucher
Browse files

drm/amdgpu: page retire over debugfs mechanism 



added support in RAS debugfs to add bad page for isolated page retirement testing

Reviewed-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: default avatarJohn Clements <john.clements@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 25315ebf

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

+67 −0
Original line number Diff line number Diff line
@@ -99,6 +99,49 @@ static bool amdgpu_ras_get_error_query_ready(struct amdgpu_device *adev) 
	return false;

}



static int amdgpu_reserve_page_direct(struct amdgpu_device *adev, uint64_t address)

{

	struct ras_err_data err_data = {0, 0, 0, NULL};

	struct eeprom_table_record err_rec;



	if ((address >= adev->gmc.mc_vram_size) ||

	    (address >= RAS_UMC_INJECT_ADDR_LIMIT)) {

		dev_warn(adev->dev,

		         "RAS WARN: input address 0x%llx is invalid.\n",

		         address);

		return -EINVAL;

	}



	if (amdgpu_ras_check_bad_page(adev, address)) {

		dev_warn(adev->dev,

			 "RAS WARN: 0x%llx has been marked as bad page!\n",

			 address);

		return 0;

	}



	memset(&err_rec, 0x0, sizeof(struct eeprom_table_record));



	err_rec.address = address;

	err_rec.retired_page = address >> AMDGPU_GPU_PAGE_SHIFT;

	err_rec.ts = (uint64_t)ktime_get_real_seconds();

	err_rec.err_type = AMDGPU_RAS_EEPROM_ERR_NON_RECOVERABLE;



	err_data.err_addr = &err_rec;

	err_data.err_addr_cnt = 1;



	if (amdgpu_bad_page_threshold != 0) {

		amdgpu_ras_add_bad_pages(adev, err_data.err_addr,

					 err_data.err_addr_cnt);

		amdgpu_ras_save_bad_pages(adev);

	}



	dev_warn(adev->dev, "WARNING: THIS IS ONLY FOR TEST PURPOSES AND WILL CORRUPT RAS EEPROM\n");

	dev_warn(adev->dev, "Clear EEPROM:\n");

	dev_warn(adev->dev, "    echo 1 > /sys/kernel/debug/dri/0/ras/ras_eeprom_reset\n");



	return 0;

}



static ssize_t amdgpu_ras_debugfs_read(struct file *f, char __user *buf,

					size_t size, loff_t *pos)

{
@@ -178,11 +221,25 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f, 
		op = 1;

	else if (sscanf(str, "inject %32s %8s", block_name, err) == 2)

		op = 2;

	else if (sscanf(str, "retire_page") == 0)

		op = 3;

	else if (str[0] && str[1] && str[2] && str[3])

		/* ascii string, but commands are not matched. */

		return -EINVAL;



	if (op != -1) {



		if (op == 3) {

			if (sscanf(str, "%*s %llu", &address) != 1)

				if (sscanf(str, "%*s 0x%llx", &address) != 1)

					return -EINVAL;



			data->op = op;

			data->inject.address = address;



			return 0;

		}



		if (amdgpu_ras_find_block_id_by_name(block_name, &block_id))

			return -EINVAL;
@@ -310,6 +367,16 @@ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f, const char __user * 
	if (ret)

		return -EINVAL;



	if (data.op == 3)

	{

		ret = amdgpu_reserve_page_direct(adev, data.inject.address);



		if (ret)

			return size;

		else

			return ret;

	}



	if (!amdgpu_ras_is_supported(adev, data.head.block))

		return -EINVAL;