RE: [PATCH] drm/amdgpu: support reserve bad page for virt

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[AMD Public Use]

Two comments inline

> -----Original Message-----
> From: Stanley.Yang <Stanley.Yang@xxxxxxx>
> Sent: 2020年6月3日 22:10
> To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: Zhang, Hawking <Hawking.Zhang@xxxxxxx>; Chen, Guchun
> <Guchun.Chen@xxxxxxx>; Liu, Monk <Monk.Liu@xxxxxxx>; Clements,
> John <John.Clements@xxxxxxx>; Zhou1, Tao <Tao.Zhou1@xxxxxxx>; Li,
> Dennis <Dennis.Li@xxxxxxx>; Yang, Stanley <Stanley.Yang@xxxxxxx>
> Subject: [PATCH] drm/amdgpu: support reserve bad page for virt
> 
> Signed-off-by: Stanley.Yang <Stanley.Yang@xxxxxxx>
> Change-Id: Ia0ad9453ac3ac929f95c73cbee5b7a8fc42a9816
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |   7 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c   | 164
> +++++++++++++++++++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h   |  30 +++-
>  3 files changed, 196 insertions(+), 5 deletions(-)  mode change 100644 =>
> 100755 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
>  mode change 100644 => 100755
> drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index b633171281f8..e8986e007206 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -2001,8 +2001,10 @@ static int amdgpu_device_ip_init(struct
> amdgpu_device *adev)
>  		}
>  	}
> 
> -	if (amdgpu_sriov_vf(adev))
> +	if (amdgpu_sriov_vf(adev)) {
> +		amdgpu_virt_init_err_handler_data(adev);

[Tao] It's can be also called in amdgpu_virt_add_bad_page once to avoid asic type check, but either way is OK for me.

>  		amdgpu_virt_init_data_exchange(adev);
> +	}
> 
>  	r = amdgpu_ib_pool_init(adev);
>  	if (r) {
> @@ -2306,6 +2308,9 @@ static int amdgpu_device_ip_fini(struct
> amdgpu_device *adev)  {
>  	int i, r;
> 
> +	if (amdgpu_sriov_vf(adev))
> +		amdgpu_release_virt_err_handler_data(adev);
> +
>  	amdgpu_ras_pre_fini(adev);
> 
>  	if (adev->gmc.xgmi.num_physical_nodes > 1) diff --git
> a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> old mode 100644
> new mode 100755
> index f3b38c9e04ca..c1554562a2ce
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> @@ -26,6 +26,7 @@
>  #include <drm/drm_drv.h>
> 
>  #include "amdgpu.h"
> +#include "amdgpu_ras.h"
> 
>  bool amdgpu_virt_mmio_blocked(struct amdgpu_device *adev)  { @@ -
> 255,12 +256,164 @@ int amdgpu_virt_fw_reserve_get_checksum(void *obj,
>  	return ret;
>  }
> 
> +int amdgpu_virt_init_err_handler_data(struct amdgpu_device *adev) {
> +	struct amdgpu_virt *virt = &adev->virt;
> +	struct virt_ras_err_handler_data **data = &virt->virt_eh_data;
> +	/* GPU will be marked bad on host if bp count more then 10,
> +	 * so alloc 512 is enough.
> +	 */
> +	unsigned int align_space = 512;
> +	void *bps = NULL;
> +	struct amdgpu_bo **bps_bo = NULL;
> +
> +	*data = kmalloc(sizeof(struct virt_ras_err_handler_data),
> GFP_KERNEL);
> +	if (!*data)
> +		return -ENOMEM;
> +
> +	bps = kmalloc(align_space * sizeof((*data)->bps), GFP_KERNEL);
> +	bps_bo = kmalloc(align_space * sizeof((*data)->bps_bo),
> GFP_KERNEL);
> +
> +	if (!bps || !bps_bo) {
> +		kfree(bps);
> +		kfree(bps_bo);
> +		return -ENOMEM;
> +	}
> +
> +	(*data)->bps = bps;
> +	(*data)->bps_bo = bps_bo;
> +	(*data)->count = 0;
> +	(*data)->last_reserved = 0;
> +	return 0;
> +}
> +
> +static void amdgpu_virt_release_bp(struct amdgpu_device *adev) {
> +	struct amdgpu_virt *virt = &adev->virt;
> +	struct virt_ras_err_handler_data *data = virt->virt_eh_data;
> +	struct amdgpu_bo *bo;
> +	int i;
> +
> +	if (!data)
> +		return;
> +
> +	for (i = data->last_reserved - 1; i >= 0; i--) {
> +		bo = data->bps_bo[i];
> +		amdgpu_bo_free_kernel(&bo, NULL, NULL);
> +		data->bps_bo[i] = bo;
> +		data->last_reserved = i;
> +	}
> +}
> +
> +void amdgpu_release_virt_err_handler_data(struct amdgpu_device *adev)
> {
> +	struct amdgpu_virt *virt = &adev->virt;
> +	struct virt_ras_err_handler_data *data = virt->virt_eh_data;
> +
> +	if (!data)
> +		return;
> +
> +	amdgpu_virt_release_bp(adev);
> +
> +	kfree(data->bps);
> +	kfree(data->bps_bo);
> +	kfree(data);
> +	virt->virt_eh_data = NULL;
> +}
> +
> +static void amdgpu_virt_ras_add_bps(struct amdgpu_device *adev,
> +		struct eeprom_table_record *bps, int pages) {
> +	struct amdgpu_virt *virt = &adev->virt;
> +	struct virt_ras_err_handler_data *data = virt->virt_eh_data;
> +
> +	if (!data)
> +		return;
> +
> +	memcpy(&data->bps[data->count], bps, pages * sizeof(*data->bps));
> +	data->count += pages;
> +}
> +
> +static void amdgpu_virt_ras_reserve_bps(struct amdgpu_device *adev) {
> +	struct amdgpu_virt *virt = &adev->virt;
> +	struct virt_ras_err_handler_data *data = virt->virt_eh_data;
> +	struct amdgpu_bo *bo = NULL;
> +	uint64_t bp;
> +	int i;
> +
> +	if (!data)
> +		return;
> +
> +	for (i = data->last_reserved; i < data->count; i++) {
> +		bp = data->bps[i].retired_page;
> +
> +		/* There are two cases of reserve error should be ignored:
> +		 * 1) a ras bad page has been allocated (used by someone);
> +		 * 2) a ras bad page has been reserved (duplicate error
> injection
> +		 *    for one page);
> +		 */
> +		if (amdgpu_bo_create_kernel_at(adev, bp <<
> AMDGPU_GPU_PAGE_SHIFT,
> +					       AMDGPU_GPU_PAGE_SIZE,
> +					       AMDGPU_GEM_DOMAIN_VRAM,
> +					       &bo, NULL))
> +			DRM_WARN("RAS WARN: reserve vram for retired
> page %llx fail\n", bp);

[Tao] It's better to distinguish the message from the one in bare mental RAS.

> +
> +		data->bps_bo[i] = bo;
> +		data->last_reserved = i + 1;
> +		bo = NULL;
> +	}
> +}
> +
> +static bool amdgpu_virt_check_bad_page(struct amdgpu_device *adev,
> +		uint64_t retired_page)
> +{
> +	struct amdgpu_virt *virt = &adev->virt;
> +	struct virt_ras_err_handler_data *data = virt->virt_eh_data;
> +	int i;
> +
> +	if (!data)
> +		return true;
> +
> +	for (i = 0; i < data->count; i++)
> +		if (retired_page == data->bps[i].retired_page)
> +			return true;
> +
> +	return false;
> +}
> +
> +static void amdgpu_virt_add_bad_page(struct amdgpu_device *adev,
> +		uint64_t bp_block_offset, uint32_t bp_block_size) {
> +	struct eeprom_table_record bp;
> +	uint64_t retired_page;
> +	uint32_t bp_idx, bp_cnt;
> +
> +	if (bp_block_size) {
> +		bp_cnt = bp_block_size / sizeof(uint64_t);
> +		for (bp_idx = 0; bp_idx < bp_cnt; bp_idx++) {
> +			retired_page = *(uint64_t *)(adev-
> >fw_vram_usage.va +
> +					bp_block_offset + bp_idx *
> sizeof(uint64_t));
> +			bp.retired_page = retired_page;
> +
> +			if (amdgpu_virt_check_bad_page(adev, retired_page))
> +				continue;
> +
> +			amdgpu_virt_ras_add_bps(adev, &bp, 1);
> +
> +			amdgpu_virt_ras_reserve_bps(adev);
> +		}
> +	}
> +}
> +
>  void amdgpu_virt_init_data_exchange(struct amdgpu_device *adev)  {
>  	uint32_t pf2vf_size = 0;
>  	uint32_t checksum = 0;
>  	uint32_t checkval;
>  	char *str;
> +	uint64_t bp_block_offset = 0;
> +	uint32_t bp_block_size = 0;
> 
>  	adev->virt.fw_reserve.p_pf2vf = NULL;
>  	adev->virt.fw_reserve.p_vf2pf = NULL;
> @@ -275,6 +428,17 @@ void amdgpu_virt_init_data_exchange(struct
> amdgpu_device *adev)
> 
>  		/* pf2vf message must be in 4K */
>  		if (pf2vf_size > 0 && pf2vf_size < 4096) {
> +			if (adev->virt.fw_reserve.p_pf2vf->version == 2) {
> +				struct amdgim_pf2vf_info_v2 *pf2vf_v2 =
> NULL;
> +
> +				pf2vf_v2 = (struct amdgim_pf2vf_info_v2
> *)adev->virt.fw_reserve.p_pf2vf;
> +				bp_block_offset = ((uint64_t)pf2vf_v2-
> >bp_block_offset_L & 0xFFFFFFFF) |
> +						((((uint64_t)pf2vf_v2-
> >bp_block_offset_H) << 32) & 0xFFFFFFFF00000000);
> +				bp_block_size = pf2vf_v2->bp_block_size;
> +
> +				amdgpu_virt_add_bad_page(adev,
> bp_block_offset, bp_block_size);
> +			}
> +
>  			checkval = amdgpu_virt_fw_reserve_get_checksum(
>  				adev->virt.fw_reserve.p_pf2vf, pf2vf_size,
>  				adev->virt.fw_reserve.checksum_key,
> checksum); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> old mode 100644
> new mode 100755
> index b90e822cebd7..96d84f036e96
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> @@ -143,19 +143,27 @@ struct  amdgim_pf2vf_info_v2 {
>  	uint32_t vce_enc_max_pixels_count;
>  	/* 16x16 pixels/sec, codec independent */
>  	uint32_t vce_enc_max_bandwidth;
> +	/* Bad pages block position in BYTE */
> +	uint32_t bp_block_offset_L;
> +	uint32_t bp_block_offset_H;
> +	/* Bad pages block size in BYTE */
> +	uint32_t bp_block_size;
>  	/* MEC FW position in kb from the start of VF visible frame buffer */
> -	uint64_t mecfw_kboffset;
> +	uint32_t mecfw_kboffset_L;
> +	uint32_t mecfw_kboffset_H;
>  	/* MEC FW size in KB */
>  	uint32_t mecfw_ksize;
>  	/* UVD FW position in kb from the start of VF visible frame buffer */
> -	uint64_t uvdfw_kboffset;
> +	uint32_t uvdfw_kboffset_L;
> +	uint32_t uvdfw_kboffset_H;
>  	/* UVD FW size in KB */
>  	uint32_t uvdfw_ksize;
>  	/* VCE FW position in kb from the start of VF visible frame buffer */
> -	uint64_t vcefw_kboffset;
> +	uint32_t vcefw_kboffset_L;
> +	uint32_t vcefw_kboffset_H;
>  	/* VCE FW size in KB */
>  	uint32_t vcefw_ksize;
> -	uint32_t reserved[AMDGIM_GET_STRUCTURE_RESERVED_SIZE(256, 0,
> 0, (9 + sizeof(struct amd_sriov_msg_pf2vf_info_header)/sizeof(uint32_t)), 3)];
> +	uint32_t reserved[AMDGIM_GET_STRUCTURE_RESERVED_SIZE(256, 0,
> 0, (18 +
> +sizeof(struct amd_sriov_msg_pf2vf_info_header)/sizeof(uint32_t)), 0)];
>  } __aligned(4);
> 
> 
> @@ -254,6 +262,17 @@ typedef struct amdgim_vf2pf_info_v2
> amdgim_vf2pf_info ;
>  		} \
>  	} while (0)
> 
> +struct virt_ras_err_handler_data {
> +	/* point to bad page records array */
> +	struct eeprom_table_record *bps;
> +	/* point to reserved bo array */
> +	struct amdgpu_bo **bps_bo;
> +	/* the count of entries */
> +	int count;
> +	/* last reserved entry's index + 1 */
> +	int last_reserved;
> +};
> +
>  /* GPU virtualization */
>  struct amdgpu_virt {
>  	uint32_t			caps;
> @@ -272,6 +291,7 @@ struct amdgpu_virt {
>  	uint32_t reg_access_mode;
>  	int req_init_data_ver;
>  	bool tdr_debug;
> +	struct virt_ras_err_handler_data *virt_eh_data;
>  };
> 
>  #define amdgpu_sriov_enabled(adev) \
> @@ -323,6 +343,8 @@ void amdgpu_virt_free_mm_table(struct
> amdgpu_device *adev);  int amdgpu_virt_fw_reserve_get_checksum(void
> *obj, unsigned long obj_size,
>  					unsigned int key,
>  					unsigned int chksum);
> +void amdgpu_release_virt_err_handler_data(struct amdgpu_device *adev);
> +int amdgpu_virt_init_err_handler_data(struct amdgpu_device *adev);
>  void amdgpu_virt_init_data_exchange(struct amdgpu_device *adev);  void
> amdgpu_detect_virtualization(struct amdgpu_device *adev);
> 
> --
> 2.25.1
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