drm/amdkfd: new range accessible by all GPUs

If xnack is on, new range is created to recover retry vm fault or
created by SVM API calls, set all GPUs have access to the range.

Signed-off-by: Philip Yang <[email protected]>
Reviewed-by: Felix Kuehling <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: PhilipYangA

drivers/gpu/drm/amd/amdkfd/kfd_svm.c

@@ -258,6 +258,7 @@ svm_range *svm_range_new(struct svm_range_list *svms, uint64_t start,
 {
 	uint64_t size = last - start + 1;
 	struct svm_range *prange;
+	struct kfd_process *p;
 
 	prange = kzalloc(sizeof(*prange), GFP_KERNEL);
 	if (!prange)
@@ -277,6 +278,11 @@ svm_range *svm_range_new(struct svm_range_list *svms, uint64_t start,
 	prange->validate_timestamp = 0;
 	mutex_init(&prange->migrate_mutex);
 	mutex_init(&prange->lock);
+
+	p = container_of(svms, struct kfd_process, svms);
+	if (p->xnack_enabled)
+		bitmap_fill(prange->bitmap_access, MAX_GPU_INSTANCE);
+
 	svm_range_set_default_attributes(&prange->preferred_loc,
 					 &prange->prefetch_loc,
 					 &prange->granularity, &prange->flags);
@@ -2246,17 +2252,15 @@ svm_range *svm_range_create_unregistered_range(struct amdgpu_device *adev,
 
 	prange = svm_range_new(&p->svms, start, last);
 	if (!prange) {
-		pr_debug("Failed to create prange in address [0x%llx]\\n", addr);
+		pr_debug("Failed to create prange in address [0x%llx]\n", addr);
 		return NULL;
 	}
 	if (kfd_process_gpuid_from_kgd(p, adev, &gpuid, &gpuidx)) {
 		pr_debug("failed to get gpuid from kgd\n");
 		svm_range_free(prange);
 		return NULL;
 	}
-	prange->preferred_loc = gpuid;
-	prange->actual_loc = 0;
-	/* Gurantee prange is migrate it */
+
 	svm_range_add_to_svms(prange);
 	svm_range_add_notifier_locked(mm, prange);