1 files changed, 113 insertions, 149 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index db3dc7ef5382..75d308ec173d 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -69,107 +69,54 @@ static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
 	}
 }
 
-static inline void ttm_bo_move_to_pinned(struct ttm_buffer_object *bo)
-{
-	struct ttm_device *bdev = bo->bdev;
-
-	list_move_tail(&bo->lru, &bdev->pinned);
-
-	if (bdev->funcs->del_from_lru_notify)
-		bdev->funcs->del_from_lru_notify(bo);
-}
-
-static inline void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
-{
-	struct ttm_device *bdev = bo->bdev;
-
-	list_del_init(&bo->lru);
-
-	if (bdev->funcs->del_from_lru_notify)
-		bdev->funcs->del_from_lru_notify(bo);
-}
-
-static void ttm_bo_bulk_move_set_pos(struct ttm_lru_bulk_move_pos *pos,
-				     struct ttm_buffer_object *bo)
-{
-	if (!pos->first)
-		pos->first = bo;
-	pos->last = bo;
-}
-
-void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
-			     struct ttm_resource *mem,
-			     struct ttm_lru_bulk_move *bulk)
+/**
+ * ttm_bo_move_to_lru_tail
+ *
+ * @bo: The buffer object.
+ *
+ * Move this BO to the tail of all lru lists used to lookup and reserve an
+ * object. This function must be called with struct ttm_global::lru_lock
+ * held, and is used to make a BO less likely to be considered for eviction.
+ */
+void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo)
 {
-	struct ttm_device *bdev = bo->bdev;
-	struct ttm_resource_manager *man;
-
-	if (!bo->deleted)
-		dma_resv_assert_held(bo->base.resv);
-
-	if (bo->pin_count) {
-		ttm_bo_move_to_pinned(bo);
-		return;
-	}
-
-	if (!mem)
-		return;
-
-	man = ttm_manager_type(bdev, mem->mem_type);
-	list_move_tail(&bo->lru, &man->lru[bo->priority]);
-
-	if (bdev->funcs->del_from_lru_notify)
-		bdev->funcs->del_from_lru_notify(bo);
-
-	if (bulk && !bo->pin_count) {
-		switch (bo->resource->mem_type) {
-		case TTM_PL_TT:
-			ttm_bo_bulk_move_set_pos(&bulk->tt[bo->priority], bo);
-			break;
+	dma_resv_assert_held(bo->base.resv);
 
-		case TTM_PL_VRAM:
-			ttm_bo_bulk_move_set_pos(&bulk->vram[bo->priority], bo);
-			break;
-		}
-	}
+	if (bo->resource)
+		ttm_resource_move_to_lru_tail(bo->resource);
 }
 EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
 
-void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk)
+/**
+ * ttm_bo_set_bulk_move - update BOs bulk move object
+ *
+ * @bo: The buffer object.
+ *
+ * Update the BOs bulk move object, making sure that resources are added/removed
+ * as well. A bulk move allows to move many resource on the LRU at once,
+ * resulting in much less overhead of maintaining the LRU.
+ * The only requirement is that the resources stay together on the LRU and are
+ * never separated. This is enforces by setting the bulk_move structure on a BO.
+ * ttm_lru_bulk_move_tail() should be used to move all resources to the tail of
+ * their LRU list.
+ */
+void ttm_bo_set_bulk_move(struct ttm_buffer_object *bo,
+			  struct ttm_lru_bulk_move *bulk)
 {
-	unsigned i;
-
-	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
-		struct ttm_lru_bulk_move_pos *pos = &bulk->tt[i];
-		struct ttm_resource_manager *man;
-
-		if (!pos->first)
-			continue;
-
-		dma_resv_assert_held(pos->first->base.resv);
-		dma_resv_assert_held(pos->last->base.resv);
-
-		man = ttm_manager_type(pos->first->bdev, TTM_PL_TT);
-		list_bulk_move_tail(&man->lru[i], &pos->first->lru,
-				    &pos->last->lru);
-	}
-
-	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
-		struct ttm_lru_bulk_move_pos *pos = &bulk->vram[i];
-		struct ttm_resource_manager *man;
-
-		if (!pos->first)
-			continue;
+	dma_resv_assert_held(bo->base.resv);
 
-		dma_resv_assert_held(pos->first->base.resv);
-		dma_resv_assert_held(pos->last->base.resv);
+	if (bo->bulk_move == bulk)
+		return;
 
-		man = ttm_manager_type(pos->first->bdev, TTM_PL_VRAM);
-		list_bulk_move_tail(&man->lru[i], &pos->first->lru,
-				    &pos->last->lru);
-	}
+	spin_lock(&bo->bdev->lru_lock);
+	if (bo->bulk_move && bo->resource)
+		ttm_lru_bulk_move_del(bo->bulk_move, bo->resource);
+	bo->bulk_move = bulk;
+	if (bo->bulk_move && bo->resource)
+		ttm_lru_bulk_move_add(bo->bulk_move, bo->resource);
+	spin_unlock(&bo->bdev->lru_lock);
 }
-EXPORT_SYMBOL(ttm_bo_bulk_move_lru_tail);
+EXPORT_SYMBOL(ttm_bo_set_bulk_move);
 
 static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
 				  struct ttm_resource *mem, bool evict,
@@ -204,6 +151,10 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
 		}
 	}
 
+	ret = dma_resv_reserve_fences(bo->base.resv, 1);
+	if (ret)
+		goto out_err;
+
 	ret = bdev->funcs->move(bo, evict, ctx, mem, hop);
 	if (ret) {
 		if (ret == -EMULTIHOP)
@@ -272,7 +223,7 @@ static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
 	struct dma_resv_iter cursor;
 	struct dma_fence *fence;
 
-	dma_resv_iter_begin(&cursor, resv, true);
+	dma_resv_iter_begin(&cursor, resv, DMA_RESV_USAGE_BOOKKEEP);
 	dma_resv_for_each_fence_unlocked(&cursor, fence) {
 		if (!fence->ops->signaled)
 			dma_fence_enable_sw_signaling(fence);
@@ -301,7 +252,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
 	struct dma_resv *resv = &bo->base._resv;
 	int ret;
 
-	if (dma_resv_test_signaled(resv, true))
+	if (dma_resv_test_signaled(resv, DMA_RESV_USAGE_BOOKKEEP))
 		ret = 0;
 	else
 		ret = -EBUSY;
@@ -313,7 +264,8 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
 			dma_resv_unlock(bo->base.resv);
 		spin_unlock(&bo->bdev->lru_lock);
 
-		lret = dma_resv_wait_timeout(resv, true, interruptible,
+		lret = dma_resv_wait_timeout(resv, DMA_RESV_USAGE_BOOKKEEP,
+					     interruptible,
 					     30 * HZ);
 
 		if (lret < 0)
@@ -344,7 +296,6 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
 		return ret;
 	}
 
-	ttm_bo_move_to_pinned(bo);
 	list_del_init(&bo->ddestroy);
 	spin_unlock(&bo->bdev->lru_lock);
 	ttm_bo_cleanup_memtype_use(bo);
@@ -409,6 +360,7 @@ static void ttm_bo_release(struct kref *kref)
 	int ret;
 
 	WARN_ON_ONCE(bo->pin_count);
+	WARN_ON_ONCE(bo->bulk_move);
 
 	if (!bo->deleted) {
 		ret = ttm_bo_individualize_resv(bo);
@@ -416,7 +368,8 @@ static void ttm_bo_release(struct kref *kref)
 			/* Last resort, if we fail to allocate memory for the
 			 * fences block for the BO to become idle
 			 */
-			dma_resv_wait_timeout(bo->base.resv, true, false,
+			dma_resv_wait_timeout(bo->base.resv,
+					      DMA_RESV_USAGE_BOOKKEEP, false,
 					      30 * HZ);
 		}
 
@@ -427,7 +380,7 @@ static void ttm_bo_release(struct kref *kref)
 		ttm_mem_io_free(bdev, bo->resource);
 	}
 
-	if (!dma_resv_test_signaled(bo->base.resv, true) ||
+	if (!dma_resv_test_signaled(bo->base.resv, DMA_RESV_USAGE_BOOKKEEP) ||
 	    !dma_resv_trylock(bo->base.resv)) {
 		/* The BO is not idle, resurrect it for delayed destroy */
 		ttm_bo_flush_all_fences(bo);
@@ -445,7 +398,7 @@ static void ttm_bo_release(struct kref *kref)
 		 */
 		if (bo->pin_count) {
 			bo->pin_count = 0;
-			ttm_bo_move_to_lru_tail(bo, bo->resource, NULL);
+			ttm_resource_move_to_lru_tail(bo->resource);
 		}
 
 		kref_init(&bo->kref);
@@ -458,7 +411,6 @@ static void ttm_bo_release(struct kref *kref)
 	}
 
 	spin_lock(&bo->bdev->lru_lock);
-	ttm_bo_del_from_lru(bo);
 	list_del(&bo->ddestroy);
 	spin_unlock(&bo->bdev->lru_lock);
 
@@ -466,7 +418,6 @@ static void ttm_bo_release(struct kref *kref)
 	dma_resv_unlock(bo->base.resv);
 
 	atomic_dec(&ttm_glob.bo_count);
-	dma_fence_put(bo->moving);
 	bo->destroy(bo);
 }
 
@@ -673,36 +624,29 @@ int ttm_mem_evict_first(struct ttm_device *bdev,
 			struct ww_acquire_ctx *ticket)
 {
 	struct ttm_buffer_object *bo = NULL, *busy_bo = NULL;
+	struct ttm_resource_cursor cursor;
+	struct ttm_resource *res;
 	bool locked = false;
-	unsigned i;
 	int ret;
 
 	spin_lock(&bdev->lru_lock);
-	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
-		list_for_each_entry(bo, &man->lru[i], lru) {
-			bool busy;
-
-			if (!ttm_bo_evict_swapout_allowable(bo, ctx, place,
-							    &locked, &busy)) {
-				if (busy && !busy_bo && ticket !=
-				    dma_resv_locking_ctx(bo->base.resv))
-					busy_bo = bo;
-				continue;
-			}
-
-			if (!ttm_bo_get_unless_zero(bo)) {
-				if (locked)
-					dma_resv_unlock(bo->base.resv);
-				continue;
-			}
-			break;
+	ttm_resource_manager_for_each_res(man, &cursor, res) {
+		bool busy;
+
+		if (!ttm_bo_evict_swapout_allowable(res->bo, ctx, place,
+						    &locked, &busy)) {
+			if (busy && !busy_bo && ticket !=
+			    dma_resv_locking_ctx(res->bo->base.resv))
+				busy_bo = res->bo;
+			continue;
 		}
 
-		/* If the inner loop terminated early, we have our candidate */
-		if (&bo->lru != &man->lru[i])
+		if (ttm_bo_get_unless_zero(res->bo)) {
+			bo = res->bo;
 			break;
-
-		bo = NULL;
+		}
+		if (locked)
+			dma_resv_unlock(res->bo->base.resv);
 	}
 
 	if (!bo) {
@@ -734,10 +678,43 @@ int ttm_mem_evict_first(struct ttm_device *bdev,
 	return ret;
 }
 
+/**
+ * ttm_bo_pin - Pin the buffer object.
+ * @bo: The buffer object to pin
+ *
+ * Make sure the buffer is not evicted any more during memory pressure.
+ * @bo must be unpinned again by calling ttm_bo_unpin().
+ */
+void ttm_bo_pin(struct ttm_buffer_object *bo)
+{
+	dma_resv_assert_held(bo->base.resv);
+	WARN_ON_ONCE(!kref_read(&bo->kref));
+	if (!(bo->pin_count++) && bo->bulk_move && bo->resource)
+		ttm_lru_bulk_move_del(bo->bulk_move, bo->resource);
+}
+EXPORT_SYMBOL(ttm_bo_pin);
+
+/**
+ * ttm_bo_unpin - Unpin the buffer object.
+ * @bo: The buffer object to unpin
+ *
+ * Allows the buffer object to be evicted again during memory pressure.
+ */
+void ttm_bo_unpin(struct ttm_buffer_object *bo)
+{
+	dma_resv_assert_held(bo->base.resv);
+	WARN_ON_ONCE(!kref_read(&bo->kref));
+	if (WARN_ON_ONCE(!bo->pin_count))
+		return;
+
+	if (!(--bo->pin_count) && bo->bulk_move && bo->resource)
+		ttm_lru_bulk_move_add(bo->bulk_move, bo->resource);
+}
+EXPORT_SYMBOL(ttm_bo_unpin);
+
 /*
- * Add the last move fence to the BO and reserve a new shared slot. We only use
- * a shared slot to avoid unecessary sync and rely on the subsequent bo move to
- * either stall or use an exclusive fence respectively set bo->moving.
+ * Add the last move fence to the BO as kernel dependency and reserve a new
+ * fence slot.
  */
 static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
 				 struct ttm_resource_manager *man,
@@ -760,17 +737,11 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
 		return ret;
 	}
 
-	dma_resv_add_shared_fence(bo->base.resv, fence);
-
-	ret = dma_resv_reserve_shared(bo->base.resv, 1);
-	if (unlikely(ret)) {
-		dma_fence_put(fence);
-		return ret;
-	}
+	dma_resv_add_fence(bo->base.resv, fence, DMA_RESV_USAGE_KERNEL);
 
-	dma_fence_put(bo->moving);
-	bo->moving = fence;
-	return 0;
+	ret = dma_resv_reserve_fences(bo->base.resv, 1);
+	dma_fence_put(fence);
+	return ret;
 }
 
 /*
@@ -821,7 +792,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 	bool type_found = false;
 	int i, ret;
 
-	ret = dma_resv_reserve_shared(bo->base.resv, 1);
+	ret = dma_resv_reserve_fences(bo->base.resv, 1);
 	if (unlikely(ret))
 		return ret;
 
@@ -875,9 +846,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 	}
 
 error:
-	if (bo->resource->mem_type == TTM_PL_SYSTEM && !bo->pin_count)
-		ttm_bo_move_to_lru_tail_unlocked(bo);
-
 	return ret;
 }
 EXPORT_SYMBOL(ttm_bo_mem_space);
@@ -971,14 +939,13 @@ int ttm_bo_init_reserved(struct ttm_device *bdev,
 	bo->destroy = destroy ? destroy : ttm_bo_default_destroy;
 
 	kref_init(&bo->kref);
-	INIT_LIST_HEAD(&bo->lru);
 	INIT_LIST_HEAD(&bo->ddestroy);
 	bo->bdev = bdev;
 	bo->type = type;
 	bo->page_alignment = page_alignment;
-	bo->moving = NULL;
 	bo->pin_count = 0;
 	bo->sg = sg;
+	bo->bulk_move = NULL;
 	if (resv) {
 		bo->base.resv = resv;
 		dma_resv_assert_held(bo->base.resv);
@@ -1021,8 +988,6 @@ int ttm_bo_init_reserved(struct ttm_device *bdev,
 		return ret;
 	}
 
-	ttm_bo_move_to_lru_tail_unlocked(bo);
-
 	return ret;
 }
 EXPORT_SYMBOL(ttm_bo_init_reserved);
@@ -1072,14 +1037,14 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
 	long timeout = 15 * HZ;
 
 	if (no_wait) {
-		if (dma_resv_test_signaled(bo->base.resv, true))
+		if (dma_resv_test_signaled(bo->base.resv, DMA_RESV_USAGE_BOOKKEEP))
 			return 0;
 		else
 			return -EBUSY;
 	}
 
-	timeout = dma_resv_wait_timeout(bo->base.resv, true, interruptible,
-					timeout);
+	timeout = dma_resv_wait_timeout(bo->base.resv, DMA_RESV_USAGE_BOOKKEEP,
+					interruptible, timeout);
 	if (timeout < 0)
 		return timeout;
 
@@ -1123,7 +1088,6 @@ int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx,
 		return ret == -EBUSY ? -ENOSPC : ret;
 	}
 
-	ttm_bo_move_to_pinned(bo);
 	/* TODO: Cleanup the locking */
 	spin_unlock(&bo->bdev->lru_lock);