1 files changed, 269 insertions, 117 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c
index 46ff9c75bb12..cc29bbf3eabb 100644
--- a/drivers/gpu/drm/ttm/ttm_resource.c
+++ b/drivers/gpu/drm/ttm/ttm_resource.c
@@ -22,13 +22,80 @@
  * Authors: Christian König
  */
 
-#include <linux/iosys-map.h>
+#include <linux/debugfs.h>
 #include <linux/io-mapping.h>
+#include <linux/iosys-map.h>
 #include <linux/scatterlist.h>
+#include <linux/cgroup_dmem.h>
 
 #include <drm/ttm/ttm_bo.h>
 #include <drm/ttm/ttm_placement.h>
 #include <drm/ttm/ttm_resource.h>
+#include <drm/ttm/ttm_tt.h>
+
+#include <drm/drm_util.h>
+
+/* Detach the cursor from the bulk move list*/
+static void
+ttm_resource_cursor_clear_bulk(struct ttm_resource_cursor *cursor)
+{
+	lockdep_assert_held(&cursor->man->bdev->lru_lock);
+
+	cursor->bulk = NULL;
+	list_del_init(&cursor->bulk_link);
+}
+
+/* Move the cursor to the end of the bulk move list it's in */
+static void ttm_resource_cursor_move_bulk_tail(struct ttm_lru_bulk_move *bulk,
+					       struct ttm_resource_cursor *cursor)
+{
+	struct ttm_lru_bulk_move_pos *pos;
+
+	lockdep_assert_held(&cursor->man->bdev->lru_lock);
+
+	if (WARN_ON_ONCE(bulk != cursor->bulk)) {
+		list_del_init(&cursor->bulk_link);
+		return;
+	}
+
+	pos = &bulk->pos[cursor->mem_type][cursor->priority];
+	if (pos->last)
+		list_move(&cursor->hitch.link, &pos->last->lru.link);
+	ttm_resource_cursor_clear_bulk(cursor);
+}
+
+/* Move all cursors attached to a bulk move to its end */
+static void ttm_bulk_move_adjust_cursors(struct ttm_lru_bulk_move *bulk)
+{
+	struct ttm_resource_cursor *cursor, *next;
+
+	list_for_each_entry_safe(cursor, next, &bulk->cursor_list, bulk_link)
+		ttm_resource_cursor_move_bulk_tail(bulk, cursor);
+}
+
+/* Remove a cursor from an empty bulk move list */
+static void ttm_bulk_move_drop_cursors(struct ttm_lru_bulk_move *bulk)
+{
+	struct ttm_resource_cursor *cursor, *next;
+
+	list_for_each_entry_safe(cursor, next, &bulk->cursor_list, bulk_link)
+		ttm_resource_cursor_clear_bulk(cursor);
+}
+
+/**
+ * ttm_resource_cursor_fini() - Finalize the LRU list cursor usage
+ * @cursor: The struct ttm_resource_cursor to finalize.
+ *
+ * The function pulls the LRU list cursor off any lists it was previusly
+ * attached to. Needs to be called with the LRU lock held. The function
+ * can be called multiple times after eachother.
+ */
+void ttm_resource_cursor_fini(struct ttm_resource_cursor *cursor)
+{
+	lockdep_assert_held(&cursor->man->bdev->lru_lock);
+	list_del_init(&cursor->hitch.link);
+	ttm_resource_cursor_clear_bulk(cursor);
+}
 
 /**
  * ttm_lru_bulk_move_init - initialize a bulk move structure
@@ -39,10 +106,28 @@
 void ttm_lru_bulk_move_init(struct ttm_lru_bulk_move *bulk)
 {
 	memset(bulk, 0, sizeof(*bulk));
+	INIT_LIST_HEAD(&bulk->cursor_list);
 }
 EXPORT_SYMBOL(ttm_lru_bulk_move_init);
 
 /**
+ * ttm_lru_bulk_move_fini - finalize a bulk move structure
+ * @bdev: The struct ttm_device
+ * @bulk: the structure to finalize
+ *
+ * Sanity checks that bulk moves don't have any
+ * resources left and hence no cursors attached.
+ */
+void ttm_lru_bulk_move_fini(struct ttm_device *bdev,
+			    struct ttm_lru_bulk_move *bulk)
+{
+	spin_lock(&bdev->lru_lock);
+	ttm_bulk_move_drop_cursors(bulk);
+	spin_unlock(&bdev->lru_lock);
+}
+EXPORT_SYMBOL(ttm_lru_bulk_move_fini);
+
+/**
  * ttm_lru_bulk_move_tail - bulk move range of resources to the LRU tail.
  *
  * @bulk: bulk move structure
@@ -54,6 +139,7 @@ void ttm_lru_bulk_move_tail(struct ttm_lru_bulk_move *bulk)
 {
 	unsigned i, j;
 
+	ttm_bulk_move_adjust_cursors(bulk);
 	for (i = 0; i < TTM_NUM_MEM_TYPES; ++i) {
 		for (j = 0; j < TTM_MAX_BO_PRIORITY; ++j) {
 			struct ttm_lru_bulk_move_pos *pos = &bulk->pos[i][j];
@@ -67,8 +153,8 @@ void ttm_lru_bulk_move_tail(struct ttm_lru_bulk_move *bulk)
 			dma_resv_assert_held(pos->last->bo->base.resv);
 
 			man = ttm_manager_type(pos->first->bo->bdev, i);
-			list_bulk_move_tail(&man->lru[j], &pos->first->lru,
-					    &pos->last->lru);
+			list_bulk_move_tail(&man->lru[j], &pos->first->lru.link,
+					    &pos->last->lru.link);
 		}
 	}
 }
@@ -81,14 +167,38 @@ ttm_lru_bulk_move_pos(struct ttm_lru_bulk_move *bulk, struct ttm_resource *res)
 	return &bulk->pos[res->mem_type][res->bo->priority];
 }
 
+/* Return the previous resource on the list (skip over non-resource list items) */
+static struct ttm_resource *ttm_lru_prev_res(struct ttm_resource *cur)
+{
+	struct ttm_lru_item *lru = &cur->lru;
+
+	do {
+		lru = list_prev_entry(lru, link);
+	} while (!ttm_lru_item_is_res(lru));
+
+	return ttm_lru_item_to_res(lru);
+}
+
+/* Return the next resource on the list (skip over non-resource list items) */
+static struct ttm_resource *ttm_lru_next_res(struct ttm_resource *cur)
+{
+	struct ttm_lru_item *lru = &cur->lru;
+
+	do {
+		lru = list_next_entry(lru, link);
+	} while (!ttm_lru_item_is_res(lru));
+
+	return ttm_lru_item_to_res(lru);
+}
+
 /* Move the resource to the tail of the bulk move range */
 static void ttm_lru_bulk_move_pos_tail(struct ttm_lru_bulk_move_pos *pos,
 				       struct ttm_resource *res)
 {
 	if (pos->last != res) {
 		if (pos->first == res)
-			pos->first = list_next_entry(res, lru);
-		list_move(&res->lru, &pos->last->lru);
+			pos->first = ttm_lru_next_res(res);
+		list_move(&res->lru.link, &pos->last->lru.link);
 		pos->last = res;
 	}
 }
@@ -103,6 +213,7 @@ static void ttm_lru_bulk_move_add(struct ttm_lru_bulk_move *bulk,
 		pos->first = res;
 		pos->last = res;
 	} else {
+		WARN_ON(pos->first->bo->base.resv != res->bo->base.resv);
 		ttm_lru_bulk_move_pos_tail(pos, res);
 	}
 }
@@ -118,19 +229,34 @@ static void ttm_lru_bulk_move_del(struct ttm_lru_bulk_move *bulk,
 		pos->first = NULL;
 		pos->last = NULL;
 	} else if (pos->first == res) {
-		pos->first = list_next_entry(res, lru);
+		pos->first = ttm_lru_next_res(res);
 	} else if (pos->last == res) {
-		pos->last = list_prev_entry(res, lru);
+		pos->last = ttm_lru_prev_res(res);
 	} else {
-		list_move(&res->lru, &pos->last->lru);
+		list_move(&res->lru.link, &pos->last->lru.link);
 	}
 }
 
+static bool ttm_resource_is_swapped(struct ttm_resource *res, struct ttm_buffer_object *bo)
+{
+	/*
+	 * Take care when creating a new resource for a bo, that it is not considered
+	 * swapped if it's not the current resource for the bo and is thus logically
+	 * associated with the ttm_tt. Think a VRAM resource created to move a
+	 * swapped-out bo to VRAM.
+	 */
+	if (bo->resource != res || !bo->ttm)
+		return false;
+
+	dma_resv_assert_held(bo->base.resv);
+	return ttm_tt_is_swapped(bo->ttm);
+}
+
 /* Add the resource to a bulk move if the BO is configured for it */
 void ttm_resource_add_bulk_move(struct ttm_resource *res,
 				struct ttm_buffer_object *bo)
 {
-	if (bo->bulk_move && !bo->pin_count)
+	if (bo->bulk_move && !bo->pin_count && !ttm_resource_is_swapped(res, bo))
 		ttm_lru_bulk_move_add(bo->bulk_move, res);
 }
 
@@ -138,7 +264,7 @@ void ttm_resource_add_bulk_move(struct ttm_resource *res,
 void ttm_resource_del_bulk_move(struct ttm_resource *res,
 				struct ttm_buffer_object *bo)
 {
-	if (bo->bulk_move && !bo->pin_count)
+	if (bo->bulk_move && !bo->pin_count && !ttm_resource_is_swapped(res, bo))
 		ttm_lru_bulk_move_del(bo->bulk_move, res);
 }
 
@@ -150,8 +276,8 @@ void ttm_resource_move_to_lru_tail(struct ttm_resource *res)
 
 	lockdep_assert_held(&bo->bdev->lru_lock);
 
-	if (bo->pin_count) {
-		list_move_tail(&res->lru, &bdev->pinned);
+	if (bo->pin_count || ttm_resource_is_swapped(res, bo)) {
+		list_move_tail(&res->lru.link, &bdev->unevictable);
 
 	} else	if (bo->bulk_move) {
 		struct ttm_lru_bulk_move_pos *pos =
@@ -162,7 +288,7 @@ void ttm_resource_move_to_lru_tail(struct ttm_resource *res)
 		struct ttm_resource_manager *man;
 
 		man = ttm_manager_type(bdev, res->mem_type);
-		list_move_tail(&res->lru, &man->lru[bo->priority]);
+		list_move_tail(&res->lru.link, &man->lru[bo->priority]);
 	}
 }
 
@@ -192,10 +318,10 @@ void ttm_resource_init(struct ttm_buffer_object *bo,
 
 	man = ttm_manager_type(bo->bdev, place->mem_type);
 	spin_lock(&bo->bdev->lru_lock);
-	if (bo->pin_count)
-		list_add_tail(&res->lru, &bo->bdev->pinned);
+	if (bo->pin_count || ttm_resource_is_swapped(res, bo))
+		list_add_tail(&res->lru.link, &bo->bdev->unevictable);
 	else
-		list_add_tail(&res->lru, &man->lru[bo->priority]);
+		list_add_tail(&res->lru.link, &man->lru[bo->priority]);
 	man->usage += res->size;
 	spin_unlock(&bo->bdev->lru_lock);
 }
@@ -217,7 +343,7 @@ void ttm_resource_fini(struct ttm_resource_manager *man,
 	struct ttm_device *bdev = man->bdev;
 
 	spin_lock(&bdev->lru_lock);
-	list_del_init(&res->lru);
+	list_del_init(&res->lru.link);
 	man->usage -= res->size;
 	spin_unlock(&bdev->lru_lock);
 }
@@ -225,25 +351,40 @@ EXPORT_SYMBOL(ttm_resource_fini);
 
 int ttm_resource_alloc(struct ttm_buffer_object *bo,
 		       const struct ttm_place *place,
-		       struct ttm_resource **res_ptr)
+		       struct ttm_resource **res_ptr,
+		       struct dmem_cgroup_pool_state **ret_limit_pool)
 {
 	struct ttm_resource_manager *man =
 		ttm_manager_type(bo->bdev, place->mem_type);
+	struct dmem_cgroup_pool_state *pool = NULL;
 	int ret;
 
+	if (man->cg) {
+		ret = dmem_cgroup_try_charge(man->cg, bo->base.size, &pool, ret_limit_pool);
+		if (ret)
+			return ret;
+	}
+
 	ret = man->func->alloc(man, bo, place, res_ptr);
-	if (ret)
+	if (ret) {
+		if (pool)
+			dmem_cgroup_uncharge(pool, bo->base.size);
 		return ret;
+	}
+
+	(*res_ptr)->css = pool;
 
 	spin_lock(&bo->bdev->lru_lock);
 	ttm_resource_add_bulk_move(*res_ptr, bo);
 	spin_unlock(&bo->bdev->lru_lock);
 	return 0;
 }
+EXPORT_SYMBOL_FOR_TESTS_ONLY(ttm_resource_alloc);
 
 void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res)
 {
 	struct ttm_resource_manager *man;
+	struct dmem_cgroup_pool_state *pool;
 
 	if (!*res)
 		return;
@@ -251,9 +392,13 @@ void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res)
 	spin_lock(&bo->bdev->lru_lock);
 	ttm_resource_del_bulk_move(*res, bo);
 	spin_unlock(&bo->bdev->lru_lock);
+
+	pool = (*res)->css;
 	man = ttm_manager_type(bo->bdev, (*res)->mem_type);
 	man->func->free(man, *res);
 	*res = NULL;
+	if (man->cg)
+		dmem_cgroup_uncharge(pool, bo->base.size);
 }
 EXPORT_SYMBOL(ttm_resource_free);
 
@@ -288,37 +433,17 @@ bool ttm_resource_intersects(struct ttm_device *bdev,
 }
 
 /**
- * ttm_resource_compatible - test for compatibility
+ * ttm_resource_compatible - check if resource is compatible with placement
  *
- * @bdev: TTM device structure
- * @res: The resource to test
- * @place: The placement to test
- * @size: How many bytes the new allocation needs.
- *
- * Test if @res compatible with @place and @size.
+ * @res: the resource to check
+ * @placement: the placement to check against
+ * @evicting: true if the caller is doing evictions
  *
- * Returns true if the res placement compatible with @place and @size.
+ * Returns true if the placement is compatible.
  */
-bool ttm_resource_compatible(struct ttm_device *bdev,
-			     struct ttm_resource *res,
-			     const struct ttm_place *place,
-			     size_t size)
-{
-	struct ttm_resource_manager *man;
-
-	if (!res || !place)
-		return false;
-
-	man = ttm_manager_type(bdev, res->mem_type);
-	if (!man->func->compatible)
-		return true;
-
-	return man->func->compatible(man, res, place, size);
-}
-
-static bool ttm_resource_places_compat(struct ttm_resource *res,
-				       const struct ttm_place *places,
-				       unsigned num_placement)
+bool ttm_resource_compatible(struct ttm_resource *res,
+			     struct ttm_placement *placement,
+			     bool evicting)
 {
 	struct ttm_buffer_object *bo = res->bo;
 	struct ttm_device *bdev = bo->bdev;
@@ -327,41 +452,28 @@ static bool ttm_resource_places_compat(struct ttm_resource *res,
 	if (res->placement & TTM_PL_FLAG_TEMPORARY)
 		return false;
 
-	for (i = 0; i < num_placement; i++) {
-		const struct ttm_place *heap = &places[i];
+	for (i = 0; i < placement->num_placement; i++) {
+		const struct ttm_place *place = &placement->placement[i];
+		struct ttm_resource_manager *man;
 
-		if (!ttm_resource_compatible(bdev, res, heap, bo->base.size))
+		if (res->mem_type != place->mem_type)
 			continue;
 
-		if ((res->mem_type == heap->mem_type) &&
-		    (!(heap->flags & TTM_PL_FLAG_CONTIGUOUS) ||
-		     (res->placement & TTM_PL_FLAG_CONTIGUOUS)))
-			return true;
-	}
-	return false;
-}
+		if (place->flags & (evicting ? TTM_PL_FLAG_DESIRED :
+				    TTM_PL_FLAG_FALLBACK))
+			continue;
 
-/**
- * ttm_resource_compat - check if resource is compatible with placement
- *
- * @res: the resource to check
- * @placement: the placement to check against
- *
- * Returns true if the placement is compatible.
- */
-bool ttm_resource_compat(struct ttm_resource *res,
-			 struct ttm_placement *placement)
-{
-	if (ttm_resource_places_compat(res, placement->placement,
-				       placement->num_placement))
-		return true;
+		if (place->flags & TTM_PL_FLAG_CONTIGUOUS &&
+		    !(res->placement & TTM_PL_FLAG_CONTIGUOUS))
+			continue;
 
-	if ((placement->busy_placement != placement->placement ||
-	     placement->num_busy_placement > placement->num_placement) &&
-	    ttm_resource_places_compat(res, placement->busy_placement,
-				       placement->num_busy_placement))
-		return true;
+		man = ttm_manager_type(bdev, res->mem_type);
+		if (man->func->compatible &&
+		    !man->func->compatible(man, res, place, bo->base.size))
+			continue;
 
+		return true;
+	}
 	return false;
 }
 
@@ -418,24 +530,11 @@ int ttm_resource_manager_evict_all(struct ttm_device *bdev,
 	};
 	struct dma_fence *fence;
 	int ret;
-	unsigned i;
 
-	/*
-	 * Can't use standard list traversal since we're unlocking.
-	 */
-
-	spin_lock(&bdev->lru_lock);
-	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
-		while (!list_empty(&man->lru[i])) {
-			spin_unlock(&bdev->lru_lock);
-			ret = ttm_mem_evict_first(bdev, man, NULL, &ctx,
-						  NULL);
-			if (ret)
-				return ret;
-			spin_lock(&bdev->lru_lock);
-		}
-	}
-	spin_unlock(&bdev->lru_lock);
+	do {
+		ret = ttm_bo_evict_first(bdev, man, &ctx);
+		cond_resched();
+	} while (!ret);
 
 	spin_lock(&man->move_lock);
 	fence = dma_fence_get(man->move);
@@ -488,53 +587,106 @@ void ttm_resource_manager_debug(struct ttm_resource_manager *man,
 }
 EXPORT_SYMBOL(ttm_resource_manager_debug);
 
+static void
+ttm_resource_cursor_check_bulk(struct ttm_resource_cursor *cursor,
+			       struct ttm_lru_item *next_lru)
+{
+	struct ttm_resource *next = ttm_lru_item_to_res(next_lru);
+	struct ttm_lru_bulk_move *bulk = NULL;
+	struct ttm_buffer_object *bo = next->bo;
+
+	lockdep_assert_held(&cursor->man->bdev->lru_lock);
+	bulk = bo->bulk_move;
+
+	if (cursor->bulk != bulk) {
+		if (bulk) {
+			list_move_tail(&cursor->bulk_link, &bulk->cursor_list);
+			cursor->mem_type = next->mem_type;
+		} else {
+			list_del_init(&cursor->bulk_link);
+		}
+		cursor->bulk = bulk;
+	}
+}
+
 /**
- * ttm_resource_manager_first
- *
+ * ttm_resource_manager_first() - Start iterating over the resources
+ * of a resource manager
  * @man: resource manager to iterate over
  * @cursor: cursor to record the position
  *
- * Returns the first resource from the resource manager.
+ * Initializes the cursor and starts iterating. When done iterating,
+ * the caller must explicitly call ttm_resource_cursor_fini().
+ *
+ * Return: The first resource from the resource manager.
  */
 struct ttm_resource *
 ttm_resource_manager_first(struct ttm_resource_manager *man,
 			   struct ttm_resource_cursor *cursor)
 {
-	struct ttm_resource *res;
-
 	lockdep_assert_held(&man->bdev->lru_lock);
 
-	for (cursor->priority = 0; cursor->priority < TTM_MAX_BO_PRIORITY;
-	     ++cursor->priority)
-		list_for_each_entry(res, &man->lru[cursor->priority], lru)
-			return res;
+	cursor->priority = 0;
+	cursor->man = man;
+	ttm_lru_item_init(&cursor->hitch, TTM_LRU_HITCH);
+	INIT_LIST_HEAD(&cursor->bulk_link);
+	list_add(&cursor->hitch.link, &man->lru[cursor->priority]);
 
-	return NULL;
+	return ttm_resource_manager_next(cursor);
 }
 
 /**
- * ttm_resource_manager_next
- *
- * @man: resource manager to iterate over
+ * ttm_resource_manager_next() - Continue iterating over the resource manager
+ * resources
  * @cursor: cursor to record the position
- * @res: the current resource pointer
  *
- * Returns the next resource from the resource manager.
+ * Return: the next resource from the resource manager.
  */
 struct ttm_resource *
-ttm_resource_manager_next(struct ttm_resource_manager *man,
-			  struct ttm_resource_cursor *cursor,
-			  struct ttm_resource *res)
+ttm_resource_manager_next(struct ttm_resource_cursor *cursor)
 {
+	struct ttm_resource_manager *man = cursor->man;
+	struct ttm_lru_item *lru;
+
 	lockdep_assert_held(&man->bdev->lru_lock);
 
-	list_for_each_entry_continue(res, &man->lru[cursor->priority], lru)
-		return res;
+	for (;;) {
+		lru = &cursor->hitch;
+		list_for_each_entry_continue(lru, &man->lru[cursor->priority], link) {
+			if (ttm_lru_item_is_res(lru)) {
+				ttm_resource_cursor_check_bulk(cursor, lru);
+				list_move(&cursor->hitch.link, &lru->link);
+				return ttm_lru_item_to_res(lru);
+			}
+		}
+
+		if (++cursor->priority >= TTM_MAX_BO_PRIORITY)
+			break;
 
-	for (++cursor->priority; cursor->priority < TTM_MAX_BO_PRIORITY;
-	     ++cursor->priority)
-		list_for_each_entry(res, &man->lru[cursor->priority], lru)
-			return res;
+		list_move(&cursor->hitch.link, &man->lru[cursor->priority]);
+		ttm_resource_cursor_clear_bulk(cursor);
+	}
+
+	ttm_resource_cursor_fini(cursor);
+
+	return NULL;
+}
+
+/**
+ * ttm_lru_first_res_or_null() - Return the first resource on an lru list
+ * @head: The list head of the lru list.
+ *
+ * Return: Pointer to the first resource on the lru list or NULL if
+ * there is none.
+ */
+struct ttm_resource *ttm_lru_first_res_or_null(struct list_head *head)
+{
+	struct ttm_lru_item *lru;
+
+	list_for_each_entry(lru, head, link) {
+		if (ttm_lru_item_is_res(lru))
+			return ttm_lru_item_to_res(lru);
+	}
 
 	return NULL;
 }