From 7e3eef93cdf8228d4f9b8ef2fddd170eedc6a0b0 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 18 Dec 2020 05:43:15 +1000 Subject: [PATCH] drm/nouveau: fix multihop when move doesn't work. As per the radeon/amdgpu fix don't use multihop is hw moves aren't enabled. Reported-by: Mike Galbraith Fixes: 0c8c0659d74 ("drm/nouveau/ttm: use multihop") Signed-off-by: Dave Airlie --- drivers/gpu/drm/nouveau/nouveau_bo.c | 31 ++++++++++++++-------------- 1 file changed, 16 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 1386b0fc1640..c85b1af06b7b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -942,16 +942,6 @@ nouveau_bo_move(struct ttm_buffer_object *bo, bool evict, struct nouveau_drm_tile *new_tile = NULL; int ret = 0; - if ((old_reg->mem_type == TTM_PL_SYSTEM && - new_reg->mem_type == TTM_PL_VRAM) || - (old_reg->mem_type == TTM_PL_VRAM && - new_reg->mem_type == TTM_PL_SYSTEM)) { - hop->fpfn = 0; - hop->lpfn = 0; - hop->mem_type = TTM_PL_TT; - hop->flags = 0; - return -EMULTIHOP; - } if (new_reg->mem_type == TTM_PL_TT) { ret = nouveau_ttm_tt_bind(bo->bdev, bo->ttm, new_reg); @@ -995,14 +985,25 @@ nouveau_bo_move(struct ttm_buffer_object *bo, bool evict, /* Hardware assisted copy. */ if (drm->ttm.move) { + if ((old_reg->mem_type == TTM_PL_SYSTEM && + new_reg->mem_type == TTM_PL_VRAM) || + (old_reg->mem_type == TTM_PL_VRAM && + new_reg->mem_type == TTM_PL_SYSTEM)) { + hop->fpfn = 0; + hop->lpfn = 0; + hop->mem_type = TTM_PL_TT; + hop->flags = 0; + return -EMULTIHOP; + } ret = nouveau_bo_move_m2mf(bo, evict, ctx, new_reg); - if (!ret) - goto out; - } + } else + ret = -ENODEV; - /* Fallback to software copy. */ - ret = ttm_bo_move_memcpy(bo, ctx, new_reg); + if (ret) { + /* Fallback to software copy. */ + ret = ttm_bo_move_memcpy(bo, ctx, new_reg); + } out: if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) { -- 2.27.0