In svm_migrate_gart_map(), while migrating GART mapping, the number of bytes copied for the GART table only accounts for CPU pages. On non-4K systems, each CPU page can contain multiple GPU pages, and the GART requires one 8-byte PTE per GPU page. As a result, an incorrect size was passed to the DMA, causing only a partial update of the GART table.
Fix this function to work correctly on non-4K page-size systems by accounting for the number of GPU pages per CPU page when calculating the number of bytes to be copied. Signed-off-by: Ritesh Harjani (IBM) <[email protected]> Signed-off-by: Donet Tom <[email protected]> --- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c index 59a5a3fea65d..ea8377071c39 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c @@ -62,7 +62,7 @@ svm_migrate_gart_map(struct amdgpu_ring *ring, u64 npages, *gart_addr = adev->gmc.gart_start; num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8); - num_bytes = npages * 8; + num_bytes = npages * 8 * AMDGPU_GPU_PAGES_IN_CPU_PAGE; r = amdgpu_job_alloc_with_ib(adev, &adev->mman.high_pr, AMDGPU_FENCE_OWNER_UNDEFINED, -- 2.52.0
