Merge tag 'drm-next-5.3-2019-06-25' of git://people.freedesktop.org/~agd5f/linux into drm-next

drm-next-5.3-2019-06-25:

Merge drm-next

amdgpu:
- SR-IOV L1 policy fixes
- Removed no longer needed vram_page_split module parameter
- Add module parameter to override default ABM level
- Gamma fixes
- No need to check return values for debugfs
- Improve HMM error handling
- Avoid possible OOM situations when lots of thread are submitting with
  memory contention
- Improve hw i2c access abritration
- DSC (Display Stream Compression) support in DC
- Initial navi10 support
  * DC support
  * GFX/Compute support
  * SDMA support
  * Power Management support
  * VCN support
- Static checker fixes
- Misc cleanups
- fix long udelay on arm

amdkfd:
- Implement priority controls for gfx9
- Enable VEGAM
- Rework mqd allocation and init
- Circular locking fix
- Fix SDMA queue allocation race condition
- No need to check return values for debugfs
- Add proc style process information
- Initial navi10 support

radeon:
- No need to check return values for debugfs

UAPI changes:
- GDDR6 added to vram type query
- New Navi10 details added gpu info query
- Navi family added to asic family query

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190625195520.3817-1-alexander.deucher@amd.com

1 files changed, 22 insertions, 10 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 8abc9b6892ea..3a9d8c15fe9f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -275,7 +275,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
 	struct drm_mm_node *nodes;
 	enum drm_mm_insert_mode mode;
 	unsigned long lpfn, num_nodes, pages_per_node, pages_left;
-	uint64_t usage = 0, vis_usage = 0;
+	uint64_t vis_usage = 0, mem_bytes;
 	unsigned i;
 	int r;
 
@@ -283,20 +283,34 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
 	if (!lpfn)
 		lpfn = man->size;
 
-	if (place->flags & TTM_PL_FLAG_CONTIGUOUS ||
-	    amdgpu_vram_page_split == -1) {
+	/* bail out quickly if there's likely not enough VRAM for this BO */
+	mem_bytes = (u64)mem->num_pages << PAGE_SHIFT;
+	if (atomic64_add_return(mem_bytes, &mgr->usage) > adev->gmc.mc_vram_size) {
+		atomic64_sub(mem_bytes, &mgr->usage);
+		mem->mm_node = NULL;
+		return 0;
+	}
+
+	if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
 		pages_per_node = ~0ul;
 		num_nodes = 1;
 	} else {
-		pages_per_node = max((uint32_t)amdgpu_vram_page_split,
-				     mem->page_alignment);
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+		pages_per_node = HPAGE_PMD_NR;
+#else
+		/* default to 2MB */
+		pages_per_node = (2UL << (20UL - PAGE_SHIFT));
+#endif
+		pages_per_node = max((uint32_t)pages_per_node, mem->page_alignment);
 		num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node);
 	}
 
-	nodes = kvmalloc_array(num_nodes, sizeof(*nodes),
+	nodes = kvmalloc_array((uint32_t)num_nodes, sizeof(*nodes),
 			       GFP_KERNEL | __GFP_ZERO);
-	if (!nodes)
+	if (!nodes) {
+		atomic64_sub(mem_bytes, &mgr->usage);
 		return -ENOMEM;
+	}
 
 	mode = DRM_MM_INSERT_BEST;
 	if (place->flags & TTM_PL_FLAG_TOPDOWN)
@@ -316,7 +330,6 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
 		if (unlikely(r))
 			break;
 
-		usage += nodes[i].size << PAGE_SHIFT;
 		vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
 		amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
 		pages_left -= pages;
@@ -336,14 +349,12 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
 		if (unlikely(r))
 			goto error;
 
-		usage += nodes[i].size << PAGE_SHIFT;
 		vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
 		amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
 		pages_left -= pages;
 	}
 	spin_unlock(&mgr->lock);
 
-	atomic64_add(usage, &mgr->usage);
 	atomic64_add(vis_usage, &mgr->vis_usage);
 
 	mem->mm_node = nodes;
@@ -354,6 +365,7 @@ error:
 	while (i--)
 		drm_mm_remove_node(&nodes[i]);
 	spin_unlock(&mgr->lock);
+	atomic64_sub(mem->num_pages << PAGE_SHIFT, &mgr->usage);
 
 	kvfree(nodes);
 	return r == -ENOSPC ? 0 : r;