From: Felix Kuehling Date: Thu, 17 Aug 2017 20:37:49 +0000 (-0400) Subject: drm/amdgpu: Fix huge page updates with CPU X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b252903afcb1139dd87605b79f41e0dc325f9ece;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/amdgpu: Fix huge page updates with CPU Correctly detect system memory mappings when using CPU and don't use huge pages for them. Avoid incorrectly translating a physical page table GPU address when splitting a huge page while mapping system memory. Signed-off-by: Felix Kuehling Reviewed-by: Christian König Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 6b1343e5541d..ba475af99332 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1277,7 +1277,7 @@ static void amdgpu_vm_handle_huge_pages(struct amdgpu_pte_update_params *p, /* In the case of a mixed PT the PDE must point to it*/ if (p->adev->asic_type < CHIP_VEGA10 || nptes != AMDGPU_VM_PTE_COUNT(p->adev) || - p->func == amdgpu_vm_do_copy_ptes || + p->src || !(flags & AMDGPU_PTE_VALID)) { dst = amdgpu_bo_gpu_offset(entry->bo); @@ -1294,9 +1294,23 @@ static void amdgpu_vm_handle_huge_pages(struct amdgpu_pte_update_params *p, entry->addr = (dst | flags); if (use_cpu_update) { + /* In case a huge page is replaced with a system + * memory mapping, p->pages_addr != NULL and + * amdgpu_vm_cpu_set_ptes would try to translate dst + * through amdgpu_vm_map_gart. But dst is already a + * GPU address (of the page table). Disable + * amdgpu_vm_map_gart temporarily. + */ + dma_addr_t *tmp; + + tmp = p->pages_addr; + p->pages_addr = NULL; + pd_addr = (unsigned long)amdgpu_bo_kptr(parent->bo); pde = pd_addr + (entry - parent->entries) * 8; amdgpu_vm_cpu_set_ptes(p, pde, dst, 1, 0, flags); + + p->pages_addr = tmp; } else { if (parent->bo->shadow) { pd_addr = amdgpu_bo_gpu_offset(parent->bo->shadow);