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drm/amdgpu: Fix missing drain retry fault the last entry

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While the entry get in svm_range_unmap_from_cpu is the last entry, and
the entry is page fault, it also need to be dropped. So for equal case,
it also need to be dropped.

v2:
Only modify the svm_range_restore_pages.

Signed-off-by: Emily Deng <Emily.Deng@amd.com>
Reviewed-by: Xiaogang Chen<xiaogang.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Emily Deng 2025-03-03 15:10:22 +08:00 committed by Alex Deucher
parent 94b0908b85
commit fe2fa3be3d
2 changed files with 4 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h
View file

@ -78,6 +78,9 @@ struct amdgpu_ih_ring {
#define amdgpu_ih_ts_after(t1, t2) \
(((int64_t)((t2) << 16) - (int64_t)((t1) << 16)) > 0LL)
#define amdgpu_ih_ts_after_or_equal(t1, t2) \
(((int64_t)((t2) << 16) - (int64_t)((t1) << 16)) >= 0LL)
/* provided by the ih block */
struct amdgpu_ih_funcs {
/* ring read/write ptr handling, called from interrupt context */

2
drivers/gpu/drm/amd/amdkfd/kfd_svm.c
View file

@ -3011,7 +3011,7 @@ svm_range_restore_pages(struct amdgpu_device *adev, unsigned int pasid,
/* check if this page fault time stamp is before svms->checkpoint_ts */
if (svms->checkpoint_ts[gpuidx] != 0) {
if (amdgpu_ih_ts_after(ts, svms->checkpoint_ts[gpuidx])) {
if (amdgpu_ih_ts_after_or_equal(ts, svms->checkpoint_ts[gpuidx])) {
pr_debug("draining retry fault, drop fault 0x%llx\n", addr);
r = 0;
goto out;