From a44df74c720eb45d16a92ab9fc8a780d961d5e2b Mon Sep 17 00:00:00 2001 From: Zack Rusin Date: Thu, 9 Feb 2023 21:34:37 -0500 Subject: [PATCH] drm/vmwgfx: Make the driver work without the dummy resources MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit In commit 180253782038 ("drm/ttm: stop allocating dummy resources during BO creation") ttm stopped allocating dummy resources but vmwgfx was never ported to handle it. Make the driver treat null resources as initial creation and port code to handle null resources in general. Fixes kernel oops'es on boot with vmwgfx. Signed-off-by: Zack Rusin Fixes: 180253782038 ("drm/ttm: stop allocating dummy resources during BO creation") Cc: Christian König Cc: Matthew Auld Cc: Nirmoy Das Cc: Christian Koenig Cc: Huang Rui Cc: dri-devel@lists.freedesktop.org Reviewed-by: Christian König Link: https://patchwork.freedesktop.org/patch/msgid/20230210023437.2214816-1-zack@kde.org --- drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 3 ++- drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 18 ++++++++++++++---- 2 files changed, 16 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c index 54e942d..71eeabf 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c @@ -837,7 +837,8 @@ void vmw_query_move_notify(struct ttm_buffer_object *bo, mutex_lock(&dev_priv->binding_mutex); /* If BO is being moved from MOB to system memory */ - if (new_mem->mem_type == TTM_PL_SYSTEM && + if (old_mem && + new_mem->mem_type == TTM_PL_SYSTEM && old_mem->mem_type == VMW_PL_MOB) { struct vmw_fence_obj *fence; diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c index 4daebc5..af8562c 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c @@ -515,9 +515,13 @@ static int vmw_move(struct ttm_buffer_object *bo, struct ttm_resource *new_mem, struct ttm_place *hop) { - struct ttm_resource_manager *old_man = ttm_manager_type(bo->bdev, bo->resource->mem_type); - struct ttm_resource_manager *new_man = ttm_manager_type(bo->bdev, new_mem->mem_type); - int ret; + struct ttm_resource_manager *new_man; + struct ttm_resource_manager *old_man = NULL; + int ret = 0; + + new_man = ttm_manager_type(bo->bdev, new_mem->mem_type); + if (bo->resource) + old_man = ttm_manager_type(bo->bdev, bo->resource->mem_type); if (new_man->use_tt && !vmw_memtype_is_system(new_mem->mem_type)) { ret = vmw_ttm_bind(bo->bdev, bo->ttm, new_mem); @@ -525,9 +529,15 @@ static int vmw_move(struct ttm_buffer_object *bo, return ret; } + if (!bo->resource || (bo->resource->mem_type == TTM_PL_SYSTEM && + bo->ttm == NULL)) { + ttm_bo_move_null(bo, new_mem); + return 0; + } + vmw_move_notify(bo, bo->resource, new_mem); - if (old_man->use_tt && new_man->use_tt) { + if (old_man && old_man->use_tt && new_man->use_tt) { if (vmw_memtype_is_system(bo->resource->mem_type)) { ttm_bo_move_null(bo, new_mem); return 0; -- 2.7.4