From 17da41bf00c849d809cb3cc5eebc43a1924736fd Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Thu, 29 Aug 2019 21:18:43 -0400 Subject: drm/amdgpu: Remove unnecessary TLB workaround (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This workaround is better handled in user mode in a way that doesn't require allocating extra memory and breaking userptr BOs. The TLB bug is a performance bug, not a functional or security bug. Hence it is safe to remove this kernel part of the workaround to allow a better workaround using only virtual address alignments in user mode. v2: Removed VI_BO_SIZE_ALIGN definition Signed-off-by: Felix Kuehling Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 17 +---------------- 1 file changed, 1 insertion(+), 16 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index f8328e069d94..55fce91f7fb6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -33,11 +33,6 @@ #include "amdgpu_amdkfd.h" #include "amdgpu_dma_buf.h" -/* Special VM and GART address alignment needed for VI pre-Fiji due to - * a HW bug. - */ -#define VI_BO_SIZE_ALIGN (0x8000) - /* BO flag to indicate a KFD userptr BO */ #define AMDGPU_AMDKFD_USERPTR_BO (1ULL << 63) @@ -1111,7 +1106,6 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu( uint64_t user_addr = 0; struct amdgpu_bo *bo; struct amdgpu_bo_param bp; - int byte_align; u32 domain, alloc_domain; u64 alloc_flags; int ret; @@ -1166,15 +1160,6 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu( if ((*mem)->aql_queue) size = size >> 1; - /* Workaround for TLB bug on older VI chips */ - byte_align = (adev->family == AMDGPU_FAMILY_VI && - adev->asic_type != CHIP_FIJI && - adev->asic_type != CHIP_POLARIS10 && - adev->asic_type != CHIP_POLARIS11 && - adev->asic_type != CHIP_POLARIS12 && - adev->asic_type != CHIP_VEGAM) ? - VI_BO_SIZE_ALIGN : 1; - (*mem)->alloc_flags = flags; amdgpu_sync_create(&(*mem)->sync); @@ -1190,7 +1175,7 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu( memset(&bp, 0, sizeof(bp)); bp.size = size; - bp.byte_align = byte_align; + bp.byte_align = 1; bp.domain = alloc_domain; bp.flags = alloc_flags; bp.type = bo_type; -- cgit v1.2.3