Merge tag 'drm-intel-fixes-2014-05-27' of git://anongit.freedesktop.org/drm-intel into drm-fixes

Fixes from Chris, all cc: stable.

* tag 'drm-intel-fixes-2014-05-27' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Prevent negative relocation deltas from wrapping
  drm/i915: Only copy back the modified fields to userspace from execbuffer
  drm/i915: Fix dynamic allocation of physical handles

drivers/gpu/drm/i915/i915_dma.c

@@ -1833,7 +1833,6 @@ int i915_driver_unload(struct drm_device *dev)
 		flush_workqueue(dev_priv->wq);
 
 		mutex_lock(&dev->struct_mutex);
-		i915_gem_free_all_phys_object(dev);
 		i915_gem_cleanup_ringbuffer(dev);
 		i915_gem_context_fini(dev);
 		WARN_ON(dev_priv->mm.aliasing_ppgtt);

drivers/gpu/drm/i915/i915_drv.h

@@ -242,18 +242,6 @@ struct intel_ddi_plls {
 #define WATCH_LISTS	0
 #define WATCH_GTT	0
 
-#define I915_GEM_PHYS_CURSOR_0 1
-#define I915_GEM_PHYS_CURSOR_1 2
-#define I915_GEM_PHYS_OVERLAY_REGS 3
-#define I915_MAX_PHYS_OBJECT (I915_GEM_PHYS_OVERLAY_REGS)
-
-struct drm_i915_gem_phys_object {
-	int id;
-	struct page **page_list;
-	drm_dma_handle_t *handle;
-	struct drm_i915_gem_object *cur_obj;
-};
-
 struct opregion_header;
 struct opregion_acpi;
 struct opregion_swsci;
@@ -1187,9 +1175,6 @@ struct i915_gem_mm {
 	/** Bit 6 swizzling required for Y tiling */
 	uint32_t bit_6_swizzle_y;
 
-	/* storage for physical objects */
-	struct drm_i915_gem_phys_object *phys_objs[I915_MAX_PHYS_OBJECT];
-
 	/* accounting, useful for userland debugging */
 	spinlock_t object_stat_lock;
 	size_t object_memory;
@@ -1769,7 +1754,7 @@ struct drm_i915_gem_object {
 	struct drm_file *pin_filp;
 
 	/** for phy allocated objects */
-	struct drm_i915_gem_phys_object *phys_obj;
+	drm_dma_handle_t *phys_handle;
 };
 
 #define to_intel_bo(x) container_of(x, struct drm_i915_gem_object, base)
@@ -2204,10 +2189,12 @@ void i915_gem_vma_destroy(struct i915_vma *vma);
 #define PIN_MAPPABLE 0x1
 #define PIN_NONBLOCK 0x2
 #define PIN_GLOBAL 0x4
+#define PIN_OFFSET_BIAS 0x8
+#define PIN_OFFSET_MASK (~4095)
 int __must_check i915_gem_object_pin(struct drm_i915_gem_object *obj,
 				     struct i915_address_space *vm,
 				     uint32_t alignment,
-				     unsigned flags);
+				     uint64_t flags);
 int __must_check i915_vma_unbind(struct i915_vma *vma);
 int i915_gem_object_put_pages(struct drm_i915_gem_object *obj);
 void i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv);
@@ -2334,13 +2321,8 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
 				     u32 alignment,
 				     struct intel_ring_buffer *pipelined);
 void i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj);
-int i915_gem_attach_phys_object(struct drm_device *dev,
-				struct drm_i915_gem_object *obj,
-				int id,
+int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj,
 				int align);
-void i915_gem_detach_phys_object(struct drm_device *dev,
-				 struct drm_i915_gem_object *obj);
-void i915_gem_free_all_phys_object(struct drm_device *dev);
 int i915_gem_open(struct drm_device *dev, struct drm_file *file);
 void i915_gem_release(struct drm_device *dev, struct drm_file *file);
 
@@ -2465,6 +2447,8 @@ int __must_check i915_gem_evict_something(struct drm_device *dev,
 					  int min_size,
 					  unsigned alignment,
 					  unsigned cache_level,
+					  unsigned long start,
+					  unsigned long end,
 					  unsigned flags);
 int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle);
 int i915_gem_evict_everything(struct drm_device *dev);

drivers/gpu/drm/i915/i915_gem_evict.c

@@ -68,9 +68,9 @@ mark_free(struct i915_vma *vma, struct list_head *unwind)
 int
 i915_gem_evict_something(struct drm_device *dev, struct i915_address_space *vm,
 			 int min_size, unsigned alignment, unsigned cache_level,
+			 unsigned long start, unsigned long end,
 			 unsigned flags)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct list_head eviction_list, unwind_list;
 	struct i915_vma *vma;
 	int ret = 0;
@@ -102,11 +102,10 @@ i915_gem_evict_something(struct drm_device *dev, struct i915_address_space *vm,
 	 */
 
 	INIT_LIST_HEAD(&unwind_list);
-	if (flags & PIN_MAPPABLE) {
-		BUG_ON(!i915_is_ggtt(vm));
+	if (start != 0 || end != vm->total) {
 		drm_mm_init_scan_with_range(&vm->mm, min_size,
-					    alignment, cache_level, 0,
-					    dev_priv->gtt.mappable_end);
+					    alignment, cache_level,
+					    start, end);
 	} else
 		drm_mm_init_scan(&vm->mm, min_size, alignment, cache_level);
 

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -35,6 +35,9 @@
 
 #define  __EXEC_OBJECT_HAS_PIN (1<<31)
 #define  __EXEC_OBJECT_HAS_FENCE (1<<30)
+#define  __EXEC_OBJECT_NEEDS_BIAS (1<<28)
+
+#define BATCH_OFFSET_BIAS (256*1024)
 
 struct eb_vmas {
 	struct list_head vmas;
@@ -545,7 +548,7 @@ i915_gem_execbuffer_reserve_vma(struct i915_vma *vma,
 	struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
 	bool has_fenced_gpu_access = INTEL_INFO(ring->dev)->gen < 4;
 	bool need_fence;
-	unsigned flags;
+	uint64_t flags;
 	int ret;
 
 	flags = 0;
@@ -559,6 +562,8 @@ i915_gem_execbuffer_reserve_vma(struct i915_vma *vma,
 
 	if (entry->flags & EXEC_OBJECT_NEEDS_GTT)
 		flags |= PIN_GLOBAL;
+	if (entry->flags & __EXEC_OBJECT_NEEDS_BIAS)
+		flags |= BATCH_OFFSET_BIAS | PIN_OFFSET_BIAS;
 
 	ret = i915_gem_object_pin(obj, vma->vm, entry->alignment, flags);
 	if (ret)
@@ -592,6 +597,36 @@ i915_gem_execbuffer_reserve_vma(struct i915_vma *vma,
 	return 0;
 }
 
+static bool
+eb_vma_misplaced(struct i915_vma *vma, bool has_fenced_gpu_access)
+{
+	struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
+	struct drm_i915_gem_object *obj = vma->obj;
+	bool need_fence, need_mappable;
+
+	need_fence =
+		has_fenced_gpu_access &&
+		entry->flags & EXEC_OBJECT_NEEDS_FENCE &&
+		obj->tiling_mode != I915_TILING_NONE;
+	need_mappable = need_fence || need_reloc_mappable(vma);
+
+	WARN_ON((need_mappable || need_fence) &&
+	       !i915_is_ggtt(vma->vm));
+
+	if (entry->alignment &&
+	    vma->node.start & (entry->alignment - 1))
+		return true;
+
+	if (need_mappable && !obj->map_and_fenceable)
+		return true;
+
+	if (entry->flags & __EXEC_OBJECT_NEEDS_BIAS &&
+	    vma->node.start < BATCH_OFFSET_BIAS)
+		return true;
+
+	return false;
+}
+
 static int
 i915_gem_execbuffer_reserve(struct intel_ring_buffer *ring,
 			    struct list_head *vmas,
@@ -653,26 +688,10 @@ i915_gem_execbuffer_reserve(struct intel_ring_buffer *ring,
 
 		/* Unbind any ill-fitting objects or pin. */
 		list_for_each_entry(vma, vmas, exec_list) {
-			struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
-			bool need_fence, need_mappable;
-
-			obj = vma->obj;
-
 			if (!drm_mm_node_allocated(&vma->node))
 				continue;
 
-			need_fence =
-				has_fenced_gpu_access &&
-				entry->flags & EXEC_OBJECT_NEEDS_FENCE &&
-				obj->tiling_mode != I915_TILING_NONE;
-			need_mappable = need_fence || need_reloc_mappable(vma);
-
-			WARN_ON((need_mappable || need_fence) &&
-			       !i915_is_ggtt(vma->vm));
-
-			if ((entry->alignment &&
-			     vma->node.start & (entry->alignment - 1)) ||
-			    (need_mappable && !obj->map_and_fenceable))
+			if (eb_vma_misplaced(vma, has_fenced_gpu_access))
 				ret = i915_vma_unbind(vma);
 			else
 				ret = i915_gem_execbuffer_reserve_vma(vma, ring, need_relocs);
@@ -773,7 +792,7 @@ i915_gem_execbuffer_relocate_slow(struct drm_device *dev,
 		 * relocations were valid.
 		 */
 		for (j = 0; j < exec[i].relocation_count; j++) {
-			if (copy_to_user(&user_relocs[j].presumed_offset,
+			if (__copy_to_user(&user_relocs[j].presumed_offset,
 					   &invalid_offset,
 					   sizeof(invalid_offset))) {
 				ret = -EFAULT;
@@ -999,6 +1018,25 @@ i915_reset_gen7_sol_offsets(struct drm_device *dev,
 	return 0;
 }
 
+static struct drm_i915_gem_object *
+eb_get_batch(struct eb_vmas *eb)
+{
+	struct i915_vma *vma = list_entry(eb->vmas.prev, typeof(*vma), exec_list);
+
+	/*
+	 * SNA is doing fancy tricks with compressing batch buffers, which leads
+	 * to negative relocation deltas. Usually that works out ok since the
+	 * relocate address is still positive, except when the batch is placed
+	 * very low in the GTT. Ensure this doesn't happen.
+	 *
+	 * Note that actual hangs have only been observed on gen7, but for
+	 * paranoia do it everywhere.
+	 */
+	vma->exec_entry->flags |= __EXEC_OBJECT_NEEDS_BIAS;
+
+	return vma->obj;
+}
+
 static int
 i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 		       struct drm_file *file,
@@ -1153,7 +1191,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 		goto err;
 
 	/* take note of the batch buffer before we might reorder the lists */
-	batch_obj = list_entry(eb->vmas.prev, struct i915_vma, exec_list)->obj;
+	batch_obj = eb_get_batch(eb);
 
 	/* Move the objects en-masse into the GTT, evicting if necessary. */
 	need_relocs = (args->flags & I915_EXEC_NO_RELOC) == 0;
@@ -1355,18 +1393,21 @@ i915_gem_execbuffer(struct drm_device *dev, void *data,
 
 	ret = i915_gem_do_execbuffer(dev, data, file, &exec2, exec2_list);
 	if (!ret) {
+		struct drm_i915_gem_exec_object __user *user_exec_list =
+			to_user_ptr(args->buffers_ptr);
+
 		/* Copy the new buffer offsets back to the user's exec list. */
-		for (i = 0; i < args->buffer_count; i++)
-			exec_list[i].offset = exec2_list[i].offset;
-		/* ... and back out to userspace */
-		ret = copy_to_user(to_user_ptr(args->buffers_ptr),
-				   exec_list,
-				   sizeof(*exec_list) * args->buffer_count);
+		for (i = 0; i < args->buffer_count; i++) {
+			ret = __copy_to_user(&user_exec_list[i].offset,
+					     &exec2_list[i].offset,
+					     sizeof(user_exec_list[i].offset));
 			if (ret) {
 				ret = -EFAULT;
 				DRM_DEBUG("failed to copy %d exec entries "
 					  "back to user (%d)\n",
 					  args->buffer_count, ret);
+				break;
+			}
 		}
 	}
 
@@ -1412,14 +1453,21 @@ i915_gem_execbuffer2(struct drm_device *dev, void *data,
 	ret = i915_gem_do_execbuffer(dev, data, file, args, exec2_list);
 	if (!ret) {
 		/* Copy the new buffer offsets back to the user's exec list. */
-		ret = copy_to_user(to_user_ptr(args->buffers_ptr),
-				   exec2_list,
-				   sizeof(*exec2_list) * args->buffer_count);
+		struct drm_i915_gem_exec_object2 *user_exec_list =
+				   to_user_ptr(args->buffers_ptr);
+		int i;
+
+		for (i = 0; i < args->buffer_count; i++) {
+			ret = __copy_to_user(&user_exec_list[i].offset,
+					     &exec2_list[i].offset,
+					     sizeof(user_exec_list[i].offset));
 			if (ret) {
 				ret = -EFAULT;
 				DRM_DEBUG("failed to copy %d exec entries "
-				  "back to user (%d)\n",
-				  args->buffer_count, ret);
+					  "back to user\n",
+					  args->buffer_count);
+				break;
+			}
 		}
 	}
 

drivers/gpu/drm/i915/i915_gem_gtt.c

@@ -1089,7 +1089,9 @@ static int gen6_ppgtt_allocate_page_directories(struct i915_hw_ppgtt *ppgtt)
 	if (ret == -ENOSPC && !retried) {
 		ret = i915_gem_evict_something(dev, &dev_priv->gtt.base,
 					       GEN6_PD_SIZE, GEN6_PD_ALIGN,
-					       I915_CACHE_NONE, 0);
+					       I915_CACHE_NONE,
+					       0, dev_priv->gtt.base.total,
+					       0);
 		if (ret)
 			return ret;
 

drivers/gpu/drm/i915/intel_display.c

@@ -7825,14 +7825,12 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
 		addr = i915_gem_obj_ggtt_offset(obj);
 	} else {
 		int align = IS_I830(dev) ? 16 * 1024 : 256;
-		ret = i915_gem_attach_phys_object(dev, obj,
-						  (intel_crtc->pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1,
-						  align);
+		ret = i915_gem_object_attach_phys(obj, align);
 		if (ret) {
 			DRM_DEBUG_KMS("failed to attach phys object\n");
 			goto fail_locked;
 		}
-		addr = obj->phys_obj->handle->busaddr;
+		addr = obj->phys_handle->busaddr;
 	}
 
 	if (IS_GEN2(dev))
@@ -7840,10 +7838,7 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
 
  finish:
 	if (intel_crtc->cursor_bo) {
-		if (INTEL_INFO(dev)->cursor_needs_physical) {
-			if (intel_crtc->cursor_bo != obj)
-				i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
-		} else
+		if (!INTEL_INFO(dev)->cursor_needs_physical)
 			i915_gem_object_unpin_from_display_plane(intel_crtc->cursor_bo);
 		drm_gem_object_unreference(&intel_crtc->cursor_bo->base);
 	}

drivers/gpu/drm/i915/intel_overlay.c

@@ -193,7 +193,7 @@ intel_overlay_map_regs(struct intel_overlay *overlay)
 	struct overlay_registers __iomem *regs;
 
 	if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
-		regs = (struct overlay_registers __iomem *)overlay->reg_bo->phys_obj->handle->vaddr;
+		regs = (struct overlay_registers __iomem *)overlay->reg_bo->phys_handle->vaddr;
 	else
 		regs = io_mapping_map_wc(dev_priv->gtt.mappable,
 					 i915_gem_obj_ggtt_offset(overlay->reg_bo));
@@ -1340,14 +1340,12 @@ void intel_setup_overlay(struct drm_device *dev)
 	overlay->reg_bo = reg_bo;
 
 	if (OVERLAY_NEEDS_PHYSICAL(dev)) {
-		ret = i915_gem_attach_phys_object(dev, reg_bo,
-						  I915_GEM_PHYS_OVERLAY_REGS,
-						  PAGE_SIZE);
+		ret = i915_gem_object_attach_phys(reg_bo, PAGE_SIZE);
 		if (ret) {
 			DRM_ERROR("failed to attach phys overlay regs\n");
 			goto out_free_bo;
 		}
-		overlay->flip_addr = reg_bo->phys_obj->handle->busaddr;
+		overlay->flip_addr = reg_bo->phys_handle->busaddr;
 	} else {
 		ret = i915_gem_obj_ggtt_pin(reg_bo, PAGE_SIZE, PIN_MAPPABLE);
 		if (ret) {
@@ -1428,7 +1426,7 @@ intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
 		/* Cast to make sparse happy, but it's wc memory anyway, so
 		 * equivalent to the wc io mapping on X86. */
 		regs = (struct overlay_registers __iomem *)
-			overlay->reg_bo->phys_obj->handle->vaddr;
+			overlay->reg_bo->phys_handle->vaddr;
 	else
 		regs = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
 						i915_gem_obj_ggtt_offset(overlay->reg_bo));
@@ -1462,7 +1460,7 @@ intel_overlay_capture_error_state(struct drm_device *dev)
 	error->dovsta = I915_READ(DOVSTA);
 	error->isr = I915_READ(ISR);
 	if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
-		error->base = (__force long)overlay->reg_bo->phys_obj->handle->vaddr;
+		error->base = (__force long)overlay->reg_bo->phys_handle->vaddr;
 	else
 		error->base = i915_gem_obj_ggtt_offset(overlay->reg_bo);