drm/xe: Convert xe_bo_create_pin_map_at() for exhaustive eviction

Most users of xe_bo_create_pin_map_at() and
xe_bo_create_pin_map_at_aligned() are not using the vm parameter,
and that simplifies conversion. Introduce an
xe_bo_create_pin_map_at_novm() function and make the _aligned()
version static. Use xe_validation_guard() for conversion.

v2:
- Adapt to signature change of xe_validation_guard(). (Matt Brost)
- Fix up documentation.
v4:
- Postpone the change to i915_gem_stolen_insert_node_in_range() to
  a later patch.

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250908101246.65025-11-thomas.hellstrom@linux.intel.com

Author: Thomas Hellström

drivers/gpu/drm/xe/display/xe_fb_pin.c

@@ -102,29 +102,29 @@ static int __xe_pin_fb_vma_dpt(const struct intel_framebuffer *fb,
 				 XE_PAGE_SIZE);
 
 	if (IS_DGFX(xe))
-		dpt = xe_bo_create_pin_map_at_aligned(xe, tile0, NULL,
-						      dpt_size, ~0ull,
-						      ttm_bo_type_kernel,
-						      XE_BO_FLAG_VRAM0 |
-						      XE_BO_FLAG_GGTT |
-						      XE_BO_FLAG_PAGETABLE,
-						      alignment);
+		dpt = xe_bo_create_pin_map_at_novm(xe, tile0,
+						   dpt_size, ~0ull,
+						   ttm_bo_type_kernel,
+						   XE_BO_FLAG_VRAM0 |
+						   XE_BO_FLAG_GGTT |
+						   XE_BO_FLAG_PAGETABLE,
+						   alignment, false);
 	else
-		dpt = xe_bo_create_pin_map_at_aligned(xe, tile0, NULL,
-						      dpt_size,  ~0ull,
-						      ttm_bo_type_kernel,
-						      XE_BO_FLAG_STOLEN |
-						      XE_BO_FLAG_GGTT |
-						      XE_BO_FLAG_PAGETABLE,
-						      alignment);
+		dpt = xe_bo_create_pin_map_at_novm(xe, tile0,
+						   dpt_size,  ~0ull,
+						   ttm_bo_type_kernel,
+						   XE_BO_FLAG_STOLEN |
+						   XE_BO_FLAG_GGTT |
+						   XE_BO_FLAG_PAGETABLE,
+						   alignment, false);
 	if (IS_ERR(dpt))
-		dpt = xe_bo_create_pin_map_at_aligned(xe, tile0, NULL,
-						      dpt_size,  ~0ull,
-						      ttm_bo_type_kernel,
-						      XE_BO_FLAG_SYSTEM |
-						      XE_BO_FLAG_GGTT |
-						      XE_BO_FLAG_PAGETABLE,
-						      alignment);
+		dpt = xe_bo_create_pin_map_at_novm(xe, tile0,
+						   dpt_size,  ~0ull,
+						   ttm_bo_type_kernel,
+						   XE_BO_FLAG_SYSTEM |
+						   XE_BO_FLAG_GGTT |
+						   XE_BO_FLAG_PAGETABLE,
+						   alignment, false);
 	if (IS_ERR(dpt))
 		return PTR_ERR(dpt);
 

drivers/gpu/drm/xe/display/xe_plane_initial.c

@@ -139,8 +139,8 @@ initial_plane_bo(struct xe_device *xe,
 			page_size);
 	size -= base;
 
-	bo = xe_bo_create_pin_map_at(xe, tile0, NULL, size, phys_base,
-				     ttm_bo_type_kernel, flags);
+	bo = xe_bo_create_pin_map_at_novm(xe, tile0, size, phys_base,
+					  ttm_bo_type_kernel, flags, 0, false);
 	if (IS_ERR(bo)) {
 		drm_dbg(&xe->drm,
 			"Failed to create bo phys_base=%pa size %u with flags %x: %li\n",

drivers/gpu/drm/xe/xe_bo.c

@@ -2428,27 +2428,17 @@ struct xe_bo *xe_bo_create_user(struct xe_device *xe,
 	return bo;
 }
 
-struct xe_bo *xe_bo_create_pin_map_at(struct xe_device *xe, struct xe_tile *tile,
-				      struct xe_vm *vm,
-				      size_t size, u64 offset,
-				      enum ttm_bo_type type, u32 flags)
-{
-	return xe_bo_create_pin_map_at_aligned(xe, tile, vm, size, offset,
-					       type, flags, 0);
-}
-
-struct xe_bo *xe_bo_create_pin_map_at_aligned(struct xe_device *xe,
-					      struct xe_tile *tile,
-					      struct xe_vm *vm,
-					      size_t size, u64 offset,
-					      enum ttm_bo_type type, u32 flags,
-					      u64 alignment)
+static struct xe_bo *xe_bo_create_pin_map_at_aligned(struct xe_device *xe,
+						     struct xe_tile *tile,
+						     struct xe_vm *vm,
+						     size_t size, u64 offset,
+						     enum ttm_bo_type type, u32 flags,
+						     u64 alignment, struct drm_exec *exec)
 {
 	struct xe_bo *bo;
 	int err;
 	u64 start = offset == ~0ull ? 0 : offset;
-	u64 end = offset == ~0ull ? offset : start + size;
-	struct drm_exec *exec = vm ? xe_vm_validation_exec(vm) : XE_VALIDATION_UNIMPLEMENTED;
+	u64 end = offset == ~0ull ? ~0ull : start + size;
 
 	if (flags & XE_BO_FLAG_STOLEN &&
 	    xe_ttm_stolen_cpu_access_needs_ggtt(xe))
@@ -2480,11 +2470,57 @@ struct xe_bo *xe_bo_create_pin_map_at_aligned(struct xe_device *xe,
 	return ERR_PTR(err);
 }
 
+/**
+ * xe_bo_create_pin_map_at_novm() - Create pinned and mapped bo at optional VRAM offset
+ * @xe: The xe device.
+ * @tile: The tile to select for migration of this bo, and the tile used for
+ * GGTT binding if any. Only to be non-NULL for ttm_bo_type_kernel bos.
+ * @size: The storage size to use for the bo.
+ * @offset: Optional VRAM offset or %~0ull for don't care.
+ * @type: The TTM buffer object type.
+ * @flags: XE_BO_FLAG_ flags.
+ * @alignment: GGTT alignment.
+ * @intr: Whether to execute any waits for backing store interruptible.
+ *
+ * Create a pinned and optionally mapped bo with VRAM offset and GGTT alignment
+ * options. The bo will be external and not associated with a VM.
+ *
+ * Return: The buffer object on success. Negative error pointer on failure.
+ * In particular, the function may return ERR_PTR(%-EINTR) if @intr was set
+ * to true on entry.
+ */
+struct xe_bo *
+xe_bo_create_pin_map_at_novm(struct xe_device *xe, struct xe_tile *tile,
+			     size_t size, u64 offset, enum ttm_bo_type type, u32 flags,
+			     u64 alignment, bool intr)
+{
+	struct xe_validation_ctx ctx;
+	struct drm_exec exec;
+	struct xe_bo *bo;
+	int ret = 0;
+
+	xe_validation_guard(&ctx, &xe->val, &exec, (struct xe_val_flags) {.interruptible = intr},
+			    ret) {
+		bo = xe_bo_create_pin_map_at_aligned(xe, tile, NULL, size, offset,
+						     type, flags, alignment, &exec);
+		if (IS_ERR(bo)) {
+			drm_exec_retry_on_contention(&exec);
+			ret = PTR_ERR(bo);
+			xe_validation_retry_on_oom(&ctx, &ret);
+		}
+	}
+
+	return ret ? ERR_PTR(ret) : bo;
+}
+
 struct xe_bo *xe_bo_create_pin_map(struct xe_device *xe, struct xe_tile *tile,
 				   struct xe_vm *vm, size_t size,
 				   enum ttm_bo_type type, u32 flags)
 {
-	return xe_bo_create_pin_map_at(xe, tile, vm, size, ~0ull, type, flags);
+	struct drm_exec *exec = vm ? xe_vm_validation_exec(vm) : XE_VALIDATION_UNIMPLEMENTED;
+
+	return xe_bo_create_pin_map_at_aligned(xe, tile, vm, size, ~0ull, type, flags,
+					       0, exec);
 }
 
 static void __xe_bo_unpin_map_no_vm(void *arg)

drivers/gpu/drm/xe/xe_bo.h

@@ -109,15 +109,10 @@ struct xe_bo *xe_bo_create_user(struct xe_device *xe, struct xe_vm *vm, size_t s
 struct xe_bo *xe_bo_create_pin_map(struct xe_device *xe, struct xe_tile *tile,
 				   struct xe_vm *vm, size_t size,
 				   enum ttm_bo_type type, u32 flags);
-struct xe_bo *xe_bo_create_pin_map_at(struct xe_device *xe, struct xe_tile *tile,
-				      struct xe_vm *vm, size_t size, u64 offset,
-				      enum ttm_bo_type type, u32 flags);
-struct xe_bo *xe_bo_create_pin_map_at_aligned(struct xe_device *xe,
-					      struct xe_tile *tile,
-					      struct xe_vm *vm,
-					      size_t size, u64 offset,
-					      enum ttm_bo_type type, u32 flags,
-					      u64 alignment);
+struct xe_bo *
+xe_bo_create_pin_map_at_novm(struct xe_device *xe, struct xe_tile *tile,
+			     size_t size, u64 offset, enum ttm_bo_type type,
+			     u32 flags, u64 alignment, bool intr);
 struct xe_bo *xe_managed_bo_create_pin_map(struct xe_device *xe, struct xe_tile *tile,
 					   size_t size, u32 flags);
 struct xe_bo *xe_managed_bo_create_from_data(struct xe_device *xe, struct xe_tile *tile,

drivers/gpu/drm/xe/xe_eu_stall.c

@@ -617,9 +617,8 @@ static int xe_eu_stall_data_buf_alloc(struct xe_eu_stall_data_stream *stream,
 
 	size = stream->per_xecore_buf_size * last_xecore;
 
-	bo = xe_bo_create_pin_map_at_aligned(tile->xe, tile, NULL,
-					     size, ~0ull, ttm_bo_type_kernel,
-					     XE_BO_FLAG_SYSTEM | XE_BO_FLAG_GGTT, SZ_64);
+	bo = xe_bo_create_pin_map_at_novm(tile->xe, tile, size, ~0ull, ttm_bo_type_kernel,
+					  XE_BO_FLAG_SYSTEM | XE_BO_FLAG_GGTT, SZ_64, false);
 	if (IS_ERR(bo)) {
 		kfree(stream->xecore_buf);
 		return PTR_ERR(bo);