From 4f49ec92be64ad1d96cf5d26fc8276f9849202a3 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Tue, 23 Jul 2013 14:06:07 +1000 Subject: qxl: allow creation of pre-pinned objects and use for releases. In order to fix an issue with reservations we need to create the releases as pre-pinned objects, this changes the placement interface and bo creation interface to allow creating pinned objects to save nested reservations later. This is just a stepping stone to main fix which follows to actually fix how qxl deals with reservations. Signed-off-by: Dave Airlie --- drivers/gpu/drm/qxl/qxl_object.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) (limited to 'drivers/gpu/drm/qxl/qxl_object.c') diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c index 1191fe7788c9..50e7a6177167 100644 --- a/drivers/gpu/drm/qxl/qxl_object.c +++ b/drivers/gpu/drm/qxl/qxl_object.c @@ -51,20 +51,21 @@ bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo) return false; } -void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain) +void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned) { u32 c = 0; + u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0; qbo->placement.fpfn = 0; qbo->placement.lpfn = 0; qbo->placement.placement = qbo->placements; qbo->placement.busy_placement = qbo->placements; if (domain == QXL_GEM_DOMAIN_VRAM) - qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM; + qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM | pflag; if (domain == QXL_GEM_DOMAIN_SURFACE) - qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_PRIV0; + qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_PRIV0 | pflag; if (domain == QXL_GEM_DOMAIN_CPU) - qbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM; + qbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM | pflag; if (!c) qbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM; qbo->placement.num_placement = c; @@ -73,7 +74,7 @@ void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain) int qxl_bo_create(struct qxl_device *qdev, - unsigned long size, bool kernel, u32 domain, + unsigned long size, bool kernel, bool pinned, u32 domain, struct qxl_surface *surf, struct qxl_bo **bo_ptr) { @@ -99,7 +100,7 @@ int qxl_bo_create(struct qxl_device *qdev, } bo->gem_base.driver_private = NULL; bo->type = domain; - bo->pin_count = 0; + bo->pin_count = pinned ? 1 : 0; bo->surface_id = 0; qxl_fence_init(qdev, &bo->fence); INIT_LIST_HEAD(&bo->list); @@ -107,7 +108,7 @@ int qxl_bo_create(struct qxl_device *qdev, if (surf) bo->surf = *surf; - qxl_ttm_placement_from_domain(bo, domain); + qxl_ttm_placement_from_domain(bo, domain, pinned); r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type, &bo->placement, 0, !kernel, NULL, size, @@ -228,7 +229,7 @@ struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo) int qxl_bo_pin(struct qxl_bo *bo, u32 domain, u64 *gpu_addr) { struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private; - int r, i; + int r; if (bo->pin_count) { bo->pin_count++; @@ -236,9 +237,7 @@ int qxl_bo_pin(struct qxl_bo *bo, u32 domain, u64 *gpu_addr) *gpu_addr = qxl_bo_gpu_offset(bo); return 0; } - qxl_ttm_placement_from_domain(bo, domain); - for (i = 0; i < bo->placement.num_placement; i++) - bo->placements[i] |= TTM_PL_FLAG_NO_EVICT; + qxl_ttm_placement_from_domain(bo, domain, true); r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false); if (likely(r == 0)) { bo->pin_count = 1; @@ -350,7 +349,7 @@ int qxl_bo_list_add(struct qxl_reloc_list *reloc_list, struct qxl_bo *bo) return ret; if (!bo->pin_count) { - qxl_ttm_placement_from_domain(bo, bo->type); + qxl_ttm_placement_from_domain(bo, bo->type, false); ret = ttm_bo_validate(&bo->tbo, &bo->placement, true, false); if (ret) -- cgit v1.2.3 From 8002db6336dd361fc13214e9515fe5d52ff294ee Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Tue, 23 Jul 2013 14:16:42 +1000 Subject: qxl: convert qxl driver to proper use for reservations The recent addition of lockdep support to reservations and their subsequent use by TTM showed up a number of potential problems with the way qxl was using TTM objects. a) it was allocating objects, and reserving them later without validating underneath the reservation, which meant in extreme conditions the objects could be evicted before the reservation ever used them. b) it was reserving objects straight after allocating them, but with no ability to back off should the reservations fail. It now allocates the necessary objects then does a complete reservation pass on them to avoid deadlocks. c) it had two lists per release tracking objects, unnecessary complicating the reservation process. This patch removes the dual object tracking, adds reservations ticket support to the release and fence object handling. It then ports the internal fb drawing code and the userspace facing ioctl to use the new interfaces properly, along with cleanup up the error path handling in some codepaths. Signed-off-by: Dave Airlie --- drivers/gpu/drm/qxl/qxl_object.c | 49 +--------------------------------------- 1 file changed, 1 insertion(+), 48 deletions(-) (limited to 'drivers/gpu/drm/qxl/qxl_object.c') diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c index 50e7a6177167..aa161cddd87e 100644 --- a/drivers/gpu/drm/qxl/qxl_object.c +++ b/drivers/gpu/drm/qxl/qxl_object.c @@ -104,7 +104,7 @@ int qxl_bo_create(struct qxl_device *qdev, bo->surface_id = 0; qxl_fence_init(qdev, &bo->fence); INIT_LIST_HEAD(&bo->list); - atomic_set(&bo->reserve_count, 0); + if (surf) bo->surf = *surf; @@ -316,53 +316,6 @@ int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo) return 0; } -void qxl_bo_list_unreserve(struct qxl_reloc_list *reloc_list, bool failed) -{ - struct qxl_bo_list *entry, *sf; - - list_for_each_entry_safe(entry, sf, &reloc_list->bos, lhead) { - qxl_bo_unreserve(entry->bo); - list_del(&entry->lhead); - kfree(entry); - } -} - -int qxl_bo_list_add(struct qxl_reloc_list *reloc_list, struct qxl_bo *bo) -{ - struct qxl_bo_list *entry; - int ret; - - list_for_each_entry(entry, &reloc_list->bos, lhead) { - if (entry->bo == bo) - return 0; - } - - entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL); - if (!entry) - return -ENOMEM; - - entry->bo = bo; - list_add(&entry->lhead, &reloc_list->bos); - - ret = qxl_bo_reserve(bo, false); - if (ret) - return ret; - - if (!bo->pin_count) { - qxl_ttm_placement_from_domain(bo, bo->type, false); - ret = ttm_bo_validate(&bo->tbo, &bo->placement, - true, false); - if (ret) - return ret; - } - - /* allocate a surface for reserved + validated buffers */ - ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, bo); - if (ret) - return ret; - return 0; -} - int qxl_surf_evict(struct qxl_device *qdev) { return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV0); -- cgit v1.2.3