1 files changed, 25 insertions, 74 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 8c7ec09eb1a4..10391fcff343 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -32,7 +32,6 @@
 
 #include <linux/dma-mapping.h>
 #include <linux/iommu.h>
-#include <linux/hmm.h>
 #include <linux/pagemap.h>
 #include <linux/sched/task.h>
 #include <linux/sched/mm.h>
@@ -112,6 +111,20 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
 	}
 
 	abo = ttm_to_amdgpu_bo(bo);
+	if (abo->flags & AMDGPU_AMDKFD_CREATE_SVM_BO) {
+		struct dma_fence *fence;
+		struct dma_resv *resv = &bo->base._resv;
+
+		rcu_read_lock();
+		fence = rcu_dereference(resv->fence_excl);
+		if (fence && !fence->ops->signaled)
+			dma_fence_enable_sw_signaling(fence);
+
+		placement->num_placement = 0;
+		placement->num_busy_placement = 0;
+		rcu_read_unlock();
+		return;
+	}
 	switch (bo->mem.mem_type) {
 	case AMDGPU_PL_GDS:
 	case AMDGPU_PL_GWS:
@@ -165,13 +178,6 @@ static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 {
 	struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
 
-	/*
-	 * Don't verify access for KFD BOs. They don't have a GEM
-	 * object associated with them.
-	 */
-	if (abo->kfd_bo)
-		return 0;
-
 	if (amdgpu_ttm_tt_get_usermm(bo->ttm))
 		return -EPERM;
 	return drm_vma_node_verify_access(&abo->tbo.base.vma_node,
@@ -288,7 +294,7 @@ error_free:
 }
 
 /**
- * amdgpu_copy_ttm_mem_to_mem - Helper function for copy
+ * amdgpu_ttm_copy_mem_to_mem - Helper function for copy
  * @adev: amdgpu device
  * @src: buffer/address where to read from
  * @dst: buffer/address where to write to
@@ -670,10 +676,8 @@ int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo, struct page **pages)
 	struct amdgpu_ttm_tt *gtt = (void *)ttm;
 	unsigned long start = gtt->userptr;
 	struct vm_area_struct *vma;
-	struct hmm_range *range;
-	unsigned long timeout;
 	struct mm_struct *mm;
-	unsigned long i;
+	bool readonly;
 	int r = 0;
 
 	mm = bo->notifier.mm;
@@ -689,76 +693,26 @@ int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo, struct page **pages)
 	if (!mmget_not_zero(mm)) /* Happens during process shutdown */
 		return -ESRCH;
 
-	range = kzalloc(sizeof(*range), GFP_KERNEL);
-	if (unlikely(!range)) {
-		r = -ENOMEM;
-		goto out;
-	}
-	range->notifier = &bo->notifier;
-	range->start = bo->notifier.interval_tree.start;
-	range->end = bo->notifier.interval_tree.last + 1;
-	range->default_flags = HMM_PFN_REQ_FAULT;
-	if (!amdgpu_ttm_tt_is_readonly(ttm))
-		range->default_flags |= HMM_PFN_REQ_WRITE;
-
-	range->hmm_pfns = kvmalloc_array(ttm->num_pages,
-					 sizeof(*range->hmm_pfns), GFP_KERNEL);
-	if (unlikely(!range->hmm_pfns)) {
-		r = -ENOMEM;
-		goto out_free_ranges;
-	}
-
 	mmap_read_lock(mm);
 	vma = find_vma(mm, start);
+	mmap_read_unlock(mm);
 	if (unlikely(!vma || start < vma->vm_start)) {
 		r = -EFAULT;
-		goto out_unlock;
+		goto out_putmm;
 	}
 	if (unlikely((gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) &&
 		vma->vm_file)) {
 		r = -EPERM;
-		goto out_unlock;
-	}
-	mmap_read_unlock(mm);
-	timeout = jiffies + msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT);
-
-retry:
-	range->notifier_seq = mmu_interval_read_begin(&bo->notifier);
-
-	mmap_read_lock(mm);
-	r = hmm_range_fault(range);
-	mmap_read_unlock(mm);
-	if (unlikely(r)) {
-		/*
-		 * FIXME: This timeout should encompass the retry from
-		 * mmu_interval_read_retry() as well.
-		 */
-		if (r == -EBUSY && !time_after(jiffies, timeout))
-			goto retry;
-		goto out_free_pfns;
+		goto out_putmm;
 	}
 
-	/*
-	 * Due to default_flags, all pages are HMM_PFN_VALID or
-	 * hmm_range_fault() fails. FIXME: The pages cannot be touched outside
-	 * the notifier_lock, and mmu_interval_read_retry() must be done first.
-	 */
-	for (i = 0; i < ttm->num_pages; i++)
-		pages[i] = hmm_pfn_to_page(range->hmm_pfns[i]);
-
-	gtt->range = range;
+	readonly = amdgpu_ttm_tt_is_readonly(ttm);
+	r = amdgpu_hmm_range_get_pages(&bo->notifier, mm, pages, start,
+				       ttm->num_pages, &gtt->range, readonly,
+				       false);
+out_putmm:
 	mmput(mm);
 
-	return 0;
-
-out_unlock:
-	mmap_read_unlock(mm);
-out_free_pfns:
-	kvfree(range->hmm_pfns);
-out_free_ranges:
-	kfree(range);
-out:
-	mmput(mm);
 	return r;
 }
 
@@ -787,10 +741,7 @@ bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm)
 		 * FIXME: Must always hold notifier_lock for this, and must
 		 * not ignore the return code.
 		 */
-		r = mmu_interval_read_retry(gtt->range->notifier,
-					 gtt->range->notifier_seq);
-		kvfree(gtt->range->hmm_pfns);
-		kfree(gtt->range);
+		r = amdgpu_hmm_range_get_pages_done(gtt->range);
 		gtt->range = NULL;
 	}