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| author | Donet Tom <donettom@linux.ibm.com> | 2026-01-12 17:06:56 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-01-14 22:28:49 +0300 |
| commit | 6c160001661b6c4e20f5c31909c722741e14c2d8 (patch) | |
| tree | 49b87ca82d9aaf571a0c7aff9698979fd1e70a15 | |
| parent | fb361a520a5861368c6c36717ff1900a35dde093 (diff) | |
| download | linux-6c160001661b6c4e20f5c31909c722741e14c2d8.tar.xz | |
drm/amdkfd: Fix GART PTE for non-4K pagesize in svm_migrate_gart_map()
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.
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Donet Tom <donettom@linux.ibm.com>
Signed-off-by: Felix Kuehling <felix.kuehling@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c index 4e0629cbd7f8..3df2bbd935e2 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c @@ -63,7 +63,7 @@ svm_migrate_gart_map(struct amdgpu_ring *ring, *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, &entity->base, AMDGPU_FENCE_OWNER_UNDEFINED, |