Am 18.03.22 um 16:45 schrieb philip yang:
On 2022-03-17 9:50 a.m., Christian König wrote:
[SNIP]
@@ -890,9 +929,20 @@ int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
r = vm->update_funcs->commit(¶ms, fence);
+ if (!unlocked && (!(flags & AMDGPU_PTE_VALID) || params.table_freed)) {
+ tlb_cb->vm = vm;
+ if (!*fence || dma_fence_add_callback(*fence, &tlb_cb->cb,
+ amdgpu_vm_tlb_seq_cb))
+ amdgpu_vm_tlb_seq_cb(*fence, &tlb_cb->cb);
+ tlb_cb = NULL;
+ }
+
Should move fence_add_callback before calling vm->update_funcs->commit?
No, absolutely not. vm->update_funcs->commit is what provides the fence
to add a callback here in the first place.
With this fixed, patches 5-7 are Reviewed-by: Philip
Yang<Philip.Yang@xxxxxxx>
Need another patch to fix svm_range_map_to_gpu, remove local variable
table_freed and call kfd_flush_tlb after waiting for update fence done.
I think I've already tackled that in the follow up patches, but I'm not
100% sure I've did it right. Please take a close look at this.
Regards,
Christian.
if (table_freed)
*table_freed = *table_freed || params.table_freed;
+error_free:
+ kfree(tlb_cb);
+
error_unlock:
amdgpu_vm_eviction_unlock(vm);
drm_dev_exit(idx);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 1731681914f5..38a1eab1ff74 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -284,6 +284,9 @@ struct amdgpu_vm {
struct drm_sched_entity immediate;
struct drm_sched_entity delayed;
+ /* Last finished delayed update */
+ atomic64_t tlb_seq;
+
/* Last unlocked submission to the scheduler entities */
struct dma_fence *last_unlocked;
@@ -478,4 +481,16 @@ int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params,
void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m);
#endif
+/**
+ * amdgpu_vm_tlb_seq - return tlb flush sequence number
+ * @vm: the amdgpu_vm structure to query
+ *
+ * Returns the tlb flush sequence number which indicates that the VM TLBs needs
+ * to be invalidated whenever the sequence number change.
+ */
+static inline uint64_t amdgpu_vm_tlb_seq(struct amdgpu_vm *vm)
+{
+ return atomic64_read(&vm->tlb_seq);
+}
+
#endif
