Re: [PATCH 1/2] drm/amdkfd: introduce dummy cache info for property asic

[Felix Kuehling <felix.kuehling@amd.com>]

Am 2022-10-20 um 05:15 schrieb Prike Liang:
> This dummy cache info will enable kfd base function support.
>
> Signed-off-by: Prike Liang <Prike.Liang@amd.com>
> ---
>   drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 55 +++++++++++++++++++++++++--
>   1 file changed, 52 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> index cd5f8b219bf9..960046e43b7a 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> @@ -795,6 +795,54 @@ static struct kfd_gpu_cache_info yellow_carp_cache_info[] = {
>   	},
>   };
>   
> +static struct kfd_gpu_cache_info dummy_cache_info[] = {
> +	{
> +		/* TCP L1 Cache per CU */
> +		.cache_size = 16,
> +		.cache_level = 1,
> +		.flags = (CRAT_CACHE_FLAGS_ENABLED |
> +				CRAT_CACHE_FLAGS_DATA_CACHE |
> +				CRAT_CACHE_FLAGS_SIMD_CACHE),
> +		.num_cu_shared = 1,
> +	},
> +	{
> +		/* Scalar L1 Instruction Cache per SQC */
> +		.cache_size = 32,
> +		.cache_level = 1,
> +		.flags = (CRAT_CACHE_FLAGS_ENABLED |
> +				CRAT_CACHE_FLAGS_INST_CACHE |
> +				CRAT_CACHE_FLAGS_SIMD_CACHE),
> +		.num_cu_shared = 2,
> +	},
> +	{
> +		/* Scalar L1 Data Cache per SQC */
> +		.cache_size = 16,
> +		.cache_level = 1,
> +		.flags = (CRAT_CACHE_FLAGS_ENABLED |
> +				CRAT_CACHE_FLAGS_DATA_CACHE |
> +				CRAT_CACHE_FLAGS_SIMD_CACHE),
> +		.num_cu_shared = 2,
> +	},
> +	{
> +		/* GL1 Data Cache per SA */
> +		.cache_size = 128,
> +		.cache_level = 1,
> +		.flags = (CRAT_CACHE_FLAGS_ENABLED |
> +				CRAT_CACHE_FLAGS_DATA_CACHE |
> +				CRAT_CACHE_FLAGS_SIMD_CACHE),
> +		.num_cu_shared = 6,
> +	},
> +	{
> +		/* L2 Data Cache per GPU (Total Tex Cache) */
> +		.cache_size = 2048,
> +		.cache_level = 2,
> +		.flags = (CRAT_CACHE_FLAGS_ENABLED |
> +				CRAT_CACHE_FLAGS_DATA_CACHE |
> +				CRAT_CACHE_FLAGS_SIMD_CACHE),
> +		.num_cu_shared = 6,
> +	},
> +};
> +
>   static void kfd_populated_cu_info_cpu(struct kfd_topology_device *dev,
>   		struct crat_subtype_computeunit *cu)
>   {
> @@ -1514,8 +1562,6 @@ static int kfd_fill_gpu_cache_info(struct kfd_dev *kdev,
>   			num_of_cache_types = ARRAY_SIZE(beige_goby_cache_info);
>   			break;
>   		case IP_VERSION(10, 3, 3):
> -		case IP_VERSION(10, 3, 6): /* TODO: Double check these on production silicon */
> -		case IP_VERSION(10, 3, 7): /* TODO: Double check these on production silicon */
>   			pcache_info = yellow_carp_cache_info;
>   			num_of_cache_types = ARRAY_SIZE(yellow_carp_cache_info);
>   			break;
> @@ -1528,7 +1574,10 @@ static int kfd_fill_gpu_cache_info(struct kfd_dev *kdev,
>   				kfd_fill_gpu_cache_info_from_gfx_config(kdev, pcache_info);
>   			break;
>   		default:
> -			return -EINVAL;
> +			pcache_info = dummy_cache_info;
> +			num_of_cache_types = ARRAY_SIZE(dummy_cache_info);
> +			pr_warn("dummy cache info is used temporarily and real cache info need update later.\n");
> +			break;

Could we make this return an error if the amdgpu.exp_hw_support module 
parameter is not set?

Regards,
   Felix


>   		}
>   	}
>