drm/i915/selftests: check for missing aperture

We may be missing support for the mappable aperture on some platforms.
Signed-off-by: NMatthew Auld <matthew.auld@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191029095856.25431-7-matthew.auld@intel.com

drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c

@@ -250,7 +250,12 @@ static bool always_valid(struct context *ctx)
 
 static bool needs_fence_registers(struct context *ctx)
 {
-	return !intel_gt_is_wedged(ctx->engine->gt);
+	struct intel_gt *gt = ctx->engine->gt;
+
+	if (intel_gt_is_wedged(gt))
+		return false;
+
+	return gt->ggtt->num_fences;
 }
 
 static bool needs_mi_store_dword(struct context *ctx)

drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c

@@ -301,6 +301,9 @@ static int igt_partial_tiling(void *arg)
 	int tiling;
 	int err;
 
+	if (!i915_ggtt_has_aperture(&i915->ggtt))
+		return 0;
+
 	/* We want to check the page mapping and fencing of a large object
 	 * mmapped through the GTT. The object we create is larger than can
 	 * possibly be mmaped as a whole, and so we must use partial GGTT vma.
@@ -431,6 +434,9 @@ static int igt_smoke_tiling(void *arg)
 	IGT_TIMEOUT(end);
 	int err;
 
+	if (!i915_ggtt_has_aperture(&i915->ggtt))
+		return 0;
+
 	/*
 	 * igt_partial_tiling() does an exhastive check of partial tiling
 	 * chunking, but will undoubtably run out of time. Here, we do a

drivers/gpu/drm/i915/gt/selftest_hangcheck.c

@@ -1149,8 +1149,12 @@ static int __igt_reset_evict_vma(struct intel_gt *gt,
 	struct i915_request *rq;
 	struct evict_vma arg;
 	struct hang h;
+	unsigned int pin_flags;
 	int err;
 
+	if (!gt->ggtt->num_fences && flags & EXEC_OBJECT_NEEDS_FENCE)
+		return 0;
+
 	if (!engine || !intel_engine_can_store_dword(engine))
 		return 0;
 
@@ -1186,10 +1190,12 @@ static int __igt_reset_evict_vma(struct intel_gt *gt,
 		goto out_obj;
 	}
 
-	err = i915_vma_pin(arg.vma, 0, 0,
-			   i915_vma_is_ggtt(arg.vma) ?
-			   PIN_GLOBAL | PIN_MAPPABLE :
-			   PIN_USER);
+	pin_flags = i915_vma_is_ggtt(arg.vma) ? PIN_GLOBAL : PIN_USER;
+
+	if (flags & EXEC_OBJECT_NEEDS_FENCE)
+		pin_flags |= PIN_MAPPABLE;
+
+	err = i915_vma_pin(arg.vma, 0, 0, pin_flags);
 	if (err) {
 		i915_request_add(rq);
 		goto out_obj;

drivers/gpu/drm/i915/selftests/i915_gem.c

@@ -45,6 +45,10 @@ static void trash_stolen(struct drm_i915_private *i915)
 	unsigned long page;
 	u32 prng = 0x12345678;
 
+	/* XXX: fsck. needs some more thought... */
+	if (!i915_ggtt_has_aperture(ggtt))
+		return;
+
 	for (page = 0; page < size; page += PAGE_SIZE) {
 		const dma_addr_t dma = i915->dsm.start + page;
 		u32 __iomem *s;

drivers/gpu/drm/i915/selftests/i915_gem_gtt.c

@@ -1149,6 +1149,9 @@ static int igt_ggtt_page(void *arg)
 	unsigned int *order, n;
 	int err;
 
+	if (!i915_ggtt_has_aperture(ggtt))
+		return 0;
+
 	obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
 	if (IS_ERR(obj))
 		return PTR_ERR(obj);