drm/i915: Combine all i915_vma bitfields into a single set of flags

In preparation to perform some magic to speed up i915_vma_pin(), which
is among the hottest of hot paths in execbuf, refactor all the bitfields
accessed by i915_vma_pin() into a single unified set of flags.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470324762-2545-16-git-send-email-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_debugfs.c

@@ -125,7 +125,7 @@ static u64 i915_gem_obj_total_ggtt_size(struct drm_i915_gem_object *obj)
 	struct i915_vma *vma;
 
 	list_for_each_entry(vma, &obj->vma_list, obj_link) {
-		if (vma->is_ggtt && drm_mm_node_allocated(&vma->node))
+		if (i915_vma_is_ggtt(vma) && drm_mm_node_allocated(&vma->node))
 			size += vma->node.size;
 	}
 
@@ -181,9 +181,9 @@ describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
 			continue;
 
 		seq_printf(m, " (%sgtt offset: %08llx, size: %08llx",
-			   vma->is_ggtt ? "g" : "pp",
+			   i915_vma_is_ggtt(vma) ? "g" : "pp",
 			   vma->node.start, vma->node.size);
-		if (vma->is_ggtt)
+		if (i915_vma_is_ggtt(vma))
 			seq_printf(m, ", type: %u", vma->ggtt_view.type);
 		seq_puts(m, ")");
 	}
@@ -356,7 +356,7 @@ static int per_file_stats(int id, void *ptr, void *data)
 		if (!drm_mm_node_allocated(&vma->node))
 			continue;
 
-		if (vma->is_ggtt) {
+		if (i915_vma_is_ggtt(vma)) {
 			stats->global += vma->node.size;
 		} else {
 			struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vma->vm);

drivers/gpu/drm/i915/i915_gem.c

@@ -2861,7 +2861,8 @@ int i915_vma_unbind(struct i915_vma *vma)
 	GEM_BUG_ON(obj->bind_count == 0);
 	GEM_BUG_ON(!obj->pages);
 
-	if (vma->is_ggtt && vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) {
+	if (i915_vma_is_ggtt(vma) &&
+	    vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) {
 		i915_gem_object_finish_gtt(obj);
 
 		/* release the fence reg _after_ flushing */
@@ -2876,12 +2877,12 @@ int i915_vma_unbind(struct i915_vma *vma)
 		trace_i915_vma_unbind(vma);
 		vma->vm->unbind_vma(vma);
 	}
-	vma->bound = 0;
+	vma->flags &= ~(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
 
 	drm_mm_remove_node(&vma->node);
 	list_move_tail(&vma->vm_link, &vma->vm->unbound_list);
 
-	if (vma->is_ggtt) {
+	if (i915_vma_is_ggtt(vma)) {
 		if (vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) {
 			obj->map_and_fenceable = false;
 		} else if (vma->ggtt_view.pages) {
@@ -2904,7 +2905,7 @@ int i915_vma_unbind(struct i915_vma *vma)
 	i915_gem_object_unpin_pages(obj);
 
 destroy:
-	if (unlikely(vma->closed))
+	if (unlikely(i915_vma_is_closed(vma)))
 		i915_vma_destroy(vma);
 
 	return 0;
@@ -2985,7 +2986,7 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
 	u64 min_alignment;
 	int ret;
 
-	GEM_BUG_ON(vma->bound);
+	GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
 	GEM_BUG_ON(drm_mm_node_allocated(&vma->node));
 
 	size = max(size, vma->size);
@@ -3707,13 +3708,14 @@ void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)
 int
 i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
 {
-	unsigned int bound = vma->bound;
+	unsigned int bound;
 	int ret;
 
 	GEM_BUG_ON((flags & (PIN_GLOBAL | PIN_USER)) == 0);
-	GEM_BUG_ON((flags & PIN_GLOBAL) && !vma->is_ggtt);
+	GEM_BUG_ON((flags & PIN_GLOBAL) && !i915_vma_is_ggtt(vma));
 
-	if (WARN_ON(i915_vma_pin_count(vma) == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT))
+	bound = vma->flags;
+	if (WARN_ON((bound & I915_VMA_PIN_MASK) == I915_VMA_PIN_MASK))
 		return -EBUSY;
 
 	/* Pin early to prevent the shrinker/eviction logic from destroying
@@ -3721,7 +3723,7 @@ i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
 	 */
 	__i915_vma_pin(vma);
 
-	if (!bound) {
+	if ((bound & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)) == 0) {
 		ret = i915_vma_insert(vma, size, alignment, flags);
 		if (ret)
 			goto err;
@@ -3731,7 +3733,7 @@ i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
 	if (ret)
 		goto err;
 
-	if ((bound ^ vma->bound) & GLOBAL_BIND)
+	if ((bound ^ vma->flags) & I915_VMA_GLOBAL_BIND)
 		__i915_vma_set_map_and_fenceable(vma);
 
 	GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));
@@ -4032,9 +4034,9 @@ void i915_gem_free_object(struct drm_gem_object *gem_obj)
 	 * unbound now.
 	 */
 	list_for_each_entry_safe(vma, next, &obj->vma_list, obj_link) {
-		GEM_BUG_ON(!vma->is_ggtt);
+		GEM_BUG_ON(!i915_vma_is_ggtt(vma));
 		GEM_BUG_ON(i915_vma_is_active(vma));
-		vma->pin_count = 0;
+		vma->flags &= ~I915_VMA_PIN_MASK;
 		i915_vma_close(vma);
 	}
 	GEM_BUG_ON(obj->bind_count);
@@ -4094,7 +4096,8 @@ struct i915_vma *i915_gem_obj_to_ggtt_view(struct drm_i915_gem_object *obj,
 	GEM_BUG_ON(!view);
 
 	list_for_each_entry(vma, &obj->vma_list, obj_link)
-		if (vma->is_ggtt && i915_ggtt_view_equal(&vma->ggtt_view, view))
+		if (i915_vma_is_ggtt(vma) &&
+		    i915_ggtt_view_equal(&vma->ggtt_view, view))
 			return vma;
 	return NULL;
 }
@@ -4583,7 +4586,7 @@ u64 i915_gem_obj_offset(struct drm_i915_gem_object *o,
 	WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base);
 
 	list_for_each_entry(vma, &o->vma_list, obj_link) {
-		if (vma->is_ggtt &&
+		if (i915_vma_is_ggtt(vma) &&
 		    vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL)
 			continue;
 		if (vma->vm == vm)
@@ -4601,7 +4604,8 @@ u64 i915_gem_obj_ggtt_offset_view(struct drm_i915_gem_object *o,
 	struct i915_vma *vma;
 
 	list_for_each_entry(vma, &o->vma_list, obj_link)
-		if (vma->is_ggtt && i915_ggtt_view_equal(&vma->ggtt_view, view))
+		if (i915_vma_is_ggtt(vma) &&
+		    i915_ggtt_view_equal(&vma->ggtt_view, view))
 			return vma->node.start;
 
 	WARN(1, "global vma for this object not found. (view=%u)\n", view->type);
@@ -4614,7 +4618,7 @@ bool i915_gem_obj_bound(struct drm_i915_gem_object *o,
 	struct i915_vma *vma;
 
 	list_for_each_entry(vma, &o->vma_list, obj_link) {
-		if (vma->is_ggtt &&
+		if (i915_vma_is_ggtt(vma) &&
 		    vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL)
 			continue;
 		if (vma->vm == vm && drm_mm_node_allocated(&vma->node))
@@ -4630,7 +4634,7 @@ bool i915_gem_obj_ggtt_bound_view(struct drm_i915_gem_object *o,
 	struct i915_vma *vma;
 
 	list_for_each_entry(vma, &o->vma_list, obj_link)
-		if (vma->is_ggtt &&
+		if (i915_vma_is_ggtt(vma) &&
 		    i915_ggtt_view_equal(&vma->ggtt_view, view) &&
 		    drm_mm_node_allocated(&vma->node))
 			return true;
@@ -4645,7 +4649,7 @@ unsigned long i915_gem_obj_ggtt_size(struct drm_i915_gem_object *o)
 	GEM_BUG_ON(list_empty(&o->vma_list));
 
 	list_for_each_entry(vma, &o->vma_list, obj_link) {
-		if (vma->is_ggtt &&
+		if (i915_vma_is_ggtt(vma) &&
 		    vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL)
 			return vma->node.size;
 	}

drivers/gpu/drm/i915/i915_gem_context.c

@@ -219,7 +219,7 @@ static void i915_ppgtt_close(struct i915_address_space *vm)
 		struct i915_vma *vma, *vn;
 
 		list_for_each_entry_safe(vma, vn, *phase, vm_link)
-			if (!vma->closed)
+			if (!i915_vma_is_closed(vma))
 				i915_vma_close(vma);
 	}
 }

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -717,7 +717,7 @@ need_reloc_mappable(struct i915_vma *vma)
 	if (entry->relocation_count == 0)
 		return false;
 
-	if (!vma->is_ggtt)
+	if (!i915_vma_is_ggtt(vma))
 		return false;
 
 	/* See also use_cpu_reloc() */
@@ -736,7 +736,8 @@ eb_vma_misplaced(struct i915_vma *vma)
 	struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
 	struct drm_i915_gem_object *obj = vma->obj;
 
-	WARN_ON(entry->flags & __EXEC_OBJECT_NEEDS_MAP && !vma->is_ggtt);
+	WARN_ON(entry->flags & __EXEC_OBJECT_NEEDS_MAP &&
+		!i915_vma_is_ggtt(vma));
 
 	if (entry->alignment &&
 	    vma->node.start & (entry->alignment - 1))

drivers/gpu/drm/i915/i915_gem_gtt.c

@@ -2652,7 +2652,7 @@ static int ggtt_bind_vma(struct i915_vma *vma,
 	 * GLOBAL/LOCAL_BIND, it's all the same ptes. Hence unconditionally
 	 * upgrade to both bound if we bind either to avoid double-binding.
 	 */
-	vma->bound |= GLOBAL_BIND | LOCAL_BIND;
+	vma->flags |= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;
 
 	return 0;
 }
@@ -2674,14 +2674,14 @@ static int aliasing_gtt_bind_vma(struct i915_vma *vma,
 		pte_flags |= PTE_READ_ONLY;
 
 
-	if (flags & GLOBAL_BIND) {
+	if (flags & I915_VMA_GLOBAL_BIND) {
 		vma->vm->insert_entries(vma->vm,
 					vma->ggtt_view.pages,
 					vma->node.start,
 					cache_level, pte_flags);
 	}
 
-	if (flags & LOCAL_BIND) {
+	if (flags & I915_VMA_LOCAL_BIND) {
 		struct i915_hw_ppgtt *appgtt =
 			to_i915(vma->vm->dev)->mm.aliasing_ppgtt;
 		appgtt->base.insert_entries(&appgtt->base,
@@ -2698,12 +2698,12 @@ static void ggtt_unbind_vma(struct i915_vma *vma)
 	struct i915_hw_ppgtt *appgtt = to_i915(vma->vm->dev)->mm.aliasing_ppgtt;
 	const u64 size = min(vma->size, vma->node.size);
 
-	if (vma->bound & GLOBAL_BIND)
+	if (vma->flags & I915_VMA_GLOBAL_BIND)
 		vma->vm->clear_range(vma->vm,
 				     vma->node.start, size,
 				     true);
 
-	if (vma->bound & LOCAL_BIND && appgtt)
+	if (vma->flags & I915_VMA_LOCAL_BIND && appgtt)
 		appgtt->base.clear_range(&appgtt->base,
 					 vma->node.start, size,
 					 true);
@@ -3334,7 +3334,7 @@ i915_vma_retire(struct i915_gem_active *active,
 		return;
 
 	list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
-	if (unlikely(vma->closed && !i915_vma_is_pinned(vma)))
+	if (unlikely(i915_vma_is_closed(vma) && !i915_vma_is_pinned(vma)))
 		WARN_ON(i915_vma_unbind(vma));
 }
 
@@ -3342,10 +3342,10 @@ void i915_vma_destroy(struct i915_vma *vma)
 {
 	GEM_BUG_ON(vma->node.allocated);
 	GEM_BUG_ON(i915_vma_is_active(vma));
-	GEM_BUG_ON(!vma->closed);
+	GEM_BUG_ON(!i915_vma_is_closed(vma));
 
 	list_del(&vma->vm_link);
-	if (!vma->is_ggtt)
+	if (!i915_vma_is_ggtt(vma))
 		i915_ppgtt_put(i915_vm_to_ppgtt(vma->vm));
 
 	kmem_cache_free(to_i915(vma->obj->base.dev)->vmas, vma);
@@ -3353,8 +3353,8 @@ void i915_vma_destroy(struct i915_vma *vma)
 
 void i915_vma_close(struct i915_vma *vma)
 {
-	GEM_BUG_ON(vma->closed);
-	vma->closed = true;
+	GEM_BUG_ON(i915_vma_is_closed(vma));
+	vma->flags |= I915_VMA_CLOSED;
 
 	list_del_init(&vma->obj_link);
 	if (!i915_vma_is_active(vma) && !i915_vma_is_pinned(vma))
@@ -3386,9 +3386,9 @@ __i915_gem_vma_create(struct drm_i915_gem_object *obj,
 	vma->vm = vm;
 	vma->obj = obj;
 	vma->size = obj->base.size;
-	vma->is_ggtt = i915_is_ggtt(vm);
 
 	if (i915_is_ggtt(vm)) {
+		vma->flags |= I915_VMA_GGTT;
 		vma->ggtt_view = *view;
 		if (view->type == I915_GGTT_VIEW_PARTIAL) {
 			vma->size = view->params.partial.size;
@@ -3433,7 +3433,7 @@ i915_gem_obj_lookup_or_create_ggtt_vma(struct drm_i915_gem_object *obj,
 	if (!vma)
 		vma = __i915_gem_vma_create(obj, &ggtt->base, view);
 
-	GEM_BUG_ON(vma->closed);
+	GEM_BUG_ON(i915_vma_is_closed(vma));
 	return vma;
 
 }
@@ -3644,27 +3644,28 @@ i915_get_ggtt_vma_pages(struct i915_vma *vma)
 int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
 		  u32 flags)
 {
-	int ret;
 	u32 bind_flags;
+	u32 vma_flags;
+	int ret;
 
 	if (WARN_ON(flags == 0))
 		return -EINVAL;
 
 	bind_flags = 0;
 	if (flags & PIN_GLOBAL)
-		bind_flags |= GLOBAL_BIND;
+		bind_flags |= I915_VMA_GLOBAL_BIND;
 	if (flags & PIN_USER)
-		bind_flags |= LOCAL_BIND;
+		bind_flags |= I915_VMA_LOCAL_BIND;
 
+	vma_flags = vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
 	if (flags & PIN_UPDATE)
-		bind_flags |= vma->bound;
+		bind_flags |= vma_flags;
 	else
-		bind_flags &= ~vma->bound;
-
+		bind_flags &= ~vma_flags;
 	if (bind_flags == 0)
 		return 0;
 
-	if (vma->bound == 0 && vma->vm->allocate_va_range) {
+	if (vma_flags == 0 && vma->vm->allocate_va_range) {
 		trace_i915_va_alloc(vma);
 		ret = vma->vm->allocate_va_range(vma->vm,
 						 vma->node.start,
@@ -3677,8 +3678,7 @@ int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
 	if (ret)
 		return ret;
 
-	vma->bound |= bind_flags;
-
+	vma->flags |= bind_flags;
 	return 0;
 }
 
@@ -3690,8 +3690,8 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
 	if (WARN_ON(!vma->obj->map_and_fenceable))
 		return IO_ERR_PTR(-ENODEV);
 
-	GEM_BUG_ON(!vma->is_ggtt);
-	GEM_BUG_ON((vma->bound & GLOBAL_BIND) == 0);
+	GEM_BUG_ON(!i915_vma_is_ggtt(vma));
+	GEM_BUG_ON((vma->flags & I915_VMA_GLOBAL_BIND) == 0);
 
 	ptr = vma->iomap;
 	if (ptr == NULL) {

drivers/gpu/drm/i915/i915_gem_gtt.h

@@ -182,15 +182,28 @@ struct i915_vma {
 	void __iomem *iomap;
 	u64 size;
 
-	unsigned int active;
-	struct i915_gem_active last_read[I915_NUM_ENGINES];
+	unsigned int flags;
+	/**
+	 * How many users have pinned this object in GTT space. The following
+	 * users can each hold at most one reference: pwrite/pread, execbuffer
+	 * (objects are not allowed multiple times for the same batchbuffer),
+	 * and the framebuffer code. When switching/pageflipping, the
+	 * framebuffer code has at most two buffers pinned per crtc.
+	 *
+	 * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3
+	 * bits with absolutely no headroom. So use 4 bits.
+	 */
+#define I915_VMA_PIN_MASK 0xf
 
 	/** Flags and address space this VMA is bound to */
-#define GLOBAL_BIND	(1<<0)
-#define LOCAL_BIND	(1<<1)
-	unsigned int bound : 4;
-	bool is_ggtt : 1;
-	bool closed : 1;
+#define I915_VMA_GLOBAL_BIND	BIT(5)
+#define I915_VMA_LOCAL_BIND	BIT(6)
+
+#define I915_VMA_GGTT	BIT(7)
+#define I915_VMA_CLOSED BIT(8)
+
+	unsigned int active;
+	struct i915_gem_active last_read[I915_NUM_ENGINES];
 
 	/**
 	 * Support different GGTT views into the same object.
@@ -215,20 +228,18 @@ struct i915_vma {
 	struct hlist_node exec_node;
 	unsigned long exec_handle;
 	struct drm_i915_gem_exec_object2 *exec_entry;
-
-	/**
-	 * How many users have pinned this object in GTT space. The following
-	 * users can each hold at most one reference: pwrite/pread, execbuffer
-	 * (objects are not allowed multiple times for the same batchbuffer),
-	 * and the framebuffer code. When switching/pageflipping, the
-	 * framebuffer code has at most two buffers pinned per crtc.
-	 *
-	 * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3
-	 * bits with absolutely no headroom. So use 4 bits. */
-	unsigned int pin_count:4;
-#define DRM_I915_GEM_OBJECT_MAX_PIN_COUNT 0xf
 };
 
+static inline bool i915_vma_is_ggtt(const struct i915_vma *vma)
+{
+	return vma->flags & I915_VMA_GGTT;
+}
+
+static inline bool i915_vma_is_closed(const struct i915_vma *vma)
+{
+	return vma->flags & I915_VMA_CLOSED;
+}
+
 static inline unsigned int i915_vma_get_active(const struct i915_vma *vma)
 {
 	return vma->active;
@@ -625,7 +636,7 @@ i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags);
 
 static inline int i915_vma_pin_count(const struct i915_vma *vma)
 {
-	return vma->pin_count;
+	return vma->flags & I915_VMA_PIN_MASK;
 }
 
 static inline bool i915_vma_is_pinned(const struct i915_vma *vma)
@@ -635,14 +646,14 @@ static inline bool i915_vma_is_pinned(const struct i915_vma *vma)
 
 static inline void __i915_vma_pin(struct i915_vma *vma)
 {
-	vma->pin_count++;
+	vma->flags++;
 	GEM_BUG_ON(!i915_vma_is_pinned(vma));
 }
 
 static inline void __i915_vma_unpin(struct i915_vma *vma)
 {
 	GEM_BUG_ON(!i915_vma_is_pinned(vma));
-	vma->pin_count--;
+	vma->flags--;
 }
 
 static inline void i915_vma_unpin(struct i915_vma *vma)

drivers/gpu/drm/i915/i915_gem_shrinker.c

@@ -53,7 +53,7 @@ static bool any_vma_pinned(struct drm_i915_gem_object *obj)
 	struct i915_vma *vma;
 
 	list_for_each_entry(vma, &obj->vma_list, obj_link)
-		if (vma->pin_count)
+		if (i915_vma_is_pinned(vma))
 			return true;
 
 	return false;

drivers/gpu/drm/i915/i915_gem_stolen.c

@@ -705,7 +705,7 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
 		goto err;
 	}
 
-	vma->bound |= GLOBAL_BIND;
+	vma->flags |= I915_VMA_GLOBAL_BIND;
 	__i915_vma_set_map_and_fenceable(vma);
 	list_move_tail(&vma->vm_link, &ggtt->base.inactive_list);
 	obj->bind_count++;

drivers/gpu/drm/i915/i915_gpu_error.c

@@ -669,14 +669,14 @@ i915_error_object_create(struct drm_i915_private *dev_priv,
 	if (i915_is_ggtt(vm))
 		vma = i915_gem_obj_to_ggtt(src);
 	use_ggtt = (src->cache_level == I915_CACHE_NONE &&
-		   vma && (vma->bound & GLOBAL_BIND) &&
+		   vma && (vma->flags & I915_VMA_GLOBAL_BIND) &&
 		   reloc_offset + num_pages * PAGE_SIZE <= ggtt->mappable_end);
 
 	/* Cannot access stolen address directly, try to use the aperture */
 	if (src->stolen) {
 		use_ggtt = true;
 
-		if (!(vma && vma->bound & GLOBAL_BIND))
+		if (!(vma && vma->flags & I915_VMA_GLOBAL_BIND))
 			goto unwind;
 
 		reloc_offset = i915_gem_obj_ggtt_offset(src);