From 76fe313adde2db165aea82699aca215ea6e9b11b Mon Sep 17 00:00:00 2001 From: =?utf8?q?Christian=20K=C3=B6nig?= Date: Fri, 25 Sep 2020 15:42:04 +0200 Subject: [PATCH] drm/nouveau: stop using TTMs fault callback MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit We already implemented the fault handler ourself, just open code what is necessary here. Signed-off-by: Christian König Reviewed-by: Dave Airlie Link: https://patchwork.freedesktop.org/patch/392323/ --- drivers/gpu/drm/nouveau/nouveau_bo.c | 50 ++++++++++++++++++----------------- drivers/gpu/drm/nouveau/nouveau_bo.h | 1 + drivers/gpu/drm/nouveau/nouveau_ttm.c | 10 ++++--- 3 files changed, 33 insertions(+), 28 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 8d51cfc..1d4b16c 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -1226,8 +1226,7 @@ nouveau_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_resource *reg) mutex_unlock(&drm->ttm.io_reserve_mutex); } -static int -nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo) +vm_fault_t nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo) { struct nouveau_drm *drm = nouveau_bdev(bo->bdev); struct nouveau_bo *nvbo = nouveau_bo(bo); @@ -1243,34 +1242,38 @@ nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo) !nvbo->kind) return 0; - if (bo->mem.mem_type == TTM_PL_SYSTEM) { - nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_GART, - 0); + if (bo->mem.mem_type != TTM_PL_SYSTEM) + return 0; + + nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_GART, 0); + + } else { + /* make sure bo is in mappable vram */ + if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA || + bo->mem.start + bo->mem.num_pages < mappable) + return 0; - ret = nouveau_bo_validate(nvbo, false, false); - if (ret) - return ret; + for (i = 0; i < nvbo->placement.num_placement; ++i) { + nvbo->placements[i].fpfn = 0; + nvbo->placements[i].lpfn = mappable; } - return 0; - } - /* make sure bo is in mappable vram */ - if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA || - bo->mem.start + bo->mem.num_pages < mappable) - return 0; + for (i = 0; i < nvbo->placement.num_busy_placement; ++i) { + nvbo->busy_placements[i].fpfn = 0; + nvbo->busy_placements[i].lpfn = mappable; + } - for (i = 0; i < nvbo->placement.num_placement; ++i) { - nvbo->placements[i].fpfn = 0; - nvbo->placements[i].lpfn = mappable; + nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_VRAM, 0); } - for (i = 0; i < nvbo->placement.num_busy_placement; ++i) { - nvbo->busy_placements[i].fpfn = 0; - nvbo->busy_placements[i].lpfn = mappable; - } + ret = nouveau_bo_validate(nvbo, false, false); + if (unlikely(ret == -EBUSY || ret == -ERESTARTSYS)) + return VM_FAULT_NOPAGE; + else if (unlikely(ret)) + return VM_FAULT_SIGBUS; - nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_VRAM, 0); - return nouveau_bo_validate(nvbo, false, false); + ttm_bo_move_to_lru_tail_unlocked(bo); + return 0; } static int @@ -1381,7 +1384,6 @@ struct ttm_bo_driver nouveau_bo_driver = { .move_notify = nouveau_bo_move_ntfy, .move = nouveau_bo_move, .verify_access = nouveau_bo_verify_access, - .fault_reserve_notify = &nouveau_ttm_fault_reserve_notify, .io_mem_reserve = &nouveau_ttm_io_mem_reserve, .io_mem_free = &nouveau_ttm_io_mem_free, }; diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.h b/drivers/gpu/drm/nouveau/nouveau_bo.h index ff68ded..641ef62 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.h +++ b/drivers/gpu/drm/nouveau/nouveau_bo.h @@ -89,6 +89,7 @@ void nouveau_bo_placement_set(struct nouveau_bo *, u32 type, u32 busy); void nouveau_bo_wr16(struct nouveau_bo *, unsigned index, u16 val); u32 nouveau_bo_rd32(struct nouveau_bo *, unsigned index); void nouveau_bo_wr32(struct nouveau_bo *, unsigned index, u32 val); +vm_fault_t nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo); void nouveau_bo_fence(struct nouveau_bo *, struct nouveau_fence *, bool exclusive); int nouveau_bo_validate(struct nouveau_bo *, bool interruptible, bool no_wait_gpu); diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c index 4273417..edf3bb8 100644 --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c @@ -134,17 +134,19 @@ static vm_fault_t nouveau_ttm_fault(struct vm_fault *vmf) if (ret) return ret; - nouveau_bo_del_io_reserve_lru(bo); + ret = nouveau_ttm_fault_reserve_notify(bo); + if (ret) + goto error_unlock; + nouveau_bo_del_io_reserve_lru(bo); prot = vm_get_page_prot(vma->vm_flags); ret = ttm_bo_vm_fault_reserved(vmf, prot, TTM_BO_VM_NUM_PREFAULT, 1); + nouveau_bo_add_io_reserve_lru(bo); if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) return ret; - nouveau_bo_add_io_reserve_lru(bo); - +error_unlock: dma_resv_unlock(bo->base.resv); - return ret; } -- 2.7.4