From 265ec0dd1a0d18f4114f62c0d4a794bb4e729bc1 Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Tue, 25 May 2021 17:10:52 +0200 Subject: [PATCH] drm/nouveau: Implement mmap as GEM object function MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Moving the driver-specific mmap code into a GEM object function allows for using DRM helpers for various mmap callbacks. The GEM object function is provided by GEM TTM helpers. Nouveau's implementation of verify_access is unused and has been removed. Access permissions are validated by the DRM helpers. As a side effect, nouveau_ttm_vm_ops and nouveau_ttm_fault() are now implemented in nouveau's GEM code. Signed-off-by: Thomas Zimmermann Reviewed-by: Christian König Link: https://patchwork.freedesktop.org/patch/msgid/20210525151055.8174-5-tzimmermann@suse.de --- drivers/gpu/drm/nouveau/nouveau_bo.c | 10 ------- drivers/gpu/drm/nouveau/nouveau_drm.c | 3 ++- drivers/gpu/drm/nouveau/nouveau_gem.c | 36 +++++++++++++++++++++++++ drivers/gpu/drm/nouveau/nouveau_ttm.c | 49 ----------------------------------- drivers/gpu/drm/nouveau/nouveau_ttm.h | 1 - 5 files changed, 38 insertions(+), 61 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 7a2624c0ba4c..c390f24f25f3 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -1050,15 +1050,6 @@ out_ntfy: return ret; } -static int -nouveau_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp) -{ - struct nouveau_bo *nvbo = nouveau_bo(bo); - - return drm_vma_node_verify_access(&nvbo->bo.base.vma_node, - filp->private_data); -} - static void nouveau_ttm_io_mem_free_locked(struct nouveau_drm *drm, struct ttm_resource *reg) @@ -1331,7 +1322,6 @@ struct ttm_device_funcs nouveau_bo_driver = { .evict_flags = nouveau_bo_evict_flags, .delete_mem_notify = nouveau_bo_delete_mem_notify, .move = nouveau_bo_move, - .verify_access = nouveau_bo_verify_access, .io_mem_reserve = &nouveau_ttm_io_mem_reserve, .io_mem_free = &nouveau_ttm_io_mem_free, }; diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 3204fc0a90d2..a616cf4573b8 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -1179,7 +1179,7 @@ nouveau_driver_fops = { .open = drm_open, .release = drm_release, .unlocked_ioctl = nouveau_drm_ioctl, - .mmap = nouveau_ttm_mmap, + .mmap = drm_gem_mmap, .poll = drm_poll, .read = drm_read, #if defined(CONFIG_COMPAT) @@ -1212,6 +1212,7 @@ driver_stub = { .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import_sg_table = nouveau_gem_prime_import_sg_table, + .gem_prime_mmap = drm_gem_prime_mmap, .dumb_create = nouveau_display_dumb_create, .dumb_map_offset = drm_gem_ttm_dumb_map_offset, diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index a70e82413fa7..722e1decc202 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -39,6 +39,40 @@ #include #include +static vm_fault_t nouveau_ttm_fault(struct vm_fault *vmf) +{ + struct vm_area_struct *vma = vmf->vma; + struct ttm_buffer_object *bo = vma->vm_private_data; + pgprot_t prot; + vm_fault_t ret; + + ret = ttm_bo_vm_reserve(bo, vmf); + if (ret) + return ret; + + 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; + +error_unlock: + dma_resv_unlock(bo->base.resv); + return ret; +} + +static const struct vm_operations_struct nouveau_ttm_vm_ops = { + .fault = nouveau_ttm_fault, + .open = ttm_bo_vm_open, + .close = ttm_bo_vm_close, + .access = ttm_bo_vm_access +}; + void nouveau_gem_object_del(struct drm_gem_object *gem) { @@ -180,6 +214,8 @@ const struct drm_gem_object_funcs nouveau_gem_object_funcs = { .get_sg_table = nouveau_gem_prime_get_sg_table, .vmap = drm_gem_ttm_vmap, .vunmap = drm_gem_ttm_vunmap, + .mmap = drm_gem_ttm_mmap, + .vm_ops = &nouveau_ttm_vm_ops, }; int diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c index 468eacb41f05..65430912ff72 100644 --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c @@ -125,55 +125,6 @@ const struct ttm_resource_manager_func nv04_gart_manager = { .free = nouveau_manager_del, }; -static vm_fault_t nouveau_ttm_fault(struct vm_fault *vmf) -{ - struct vm_area_struct *vma = vmf->vma; - struct ttm_buffer_object *bo = vma->vm_private_data; - pgprot_t prot; - vm_fault_t ret; - - ret = ttm_bo_vm_reserve(bo, vmf); - if (ret) - return ret; - - 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; - -error_unlock: - dma_resv_unlock(bo->base.resv); - return ret; -} - -static const struct vm_operations_struct nouveau_ttm_vm_ops = { - .fault = nouveau_ttm_fault, - .open = ttm_bo_vm_open, - .close = ttm_bo_vm_close, - .access = ttm_bo_vm_access -}; - -int -nouveau_ttm_mmap(struct file *filp, struct vm_area_struct *vma) -{ - struct drm_file *file_priv = filp->private_data; - struct nouveau_drm *drm = nouveau_drm(file_priv->minor->dev); - int ret; - - ret = ttm_bo_mmap(filp, vma, &drm->ttm.bdev); - if (ret) - return ret; - - vma->vm_ops = &nouveau_ttm_vm_ops; - return 0; -} - static int nouveau_ttm_init_host(struct nouveau_drm *drm, u8 kind) { diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.h b/drivers/gpu/drm/nouveau/nouveau_ttm.h index dbf6dc238efd..2f0efda7ccdb 100644 --- a/drivers/gpu/drm/nouveau/nouveau_ttm.h +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.h @@ -17,7 +17,6 @@ struct ttm_tt *nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, int nouveau_ttm_init(struct nouveau_drm *drm); void nouveau_ttm_fini(struct nouveau_drm *drm); -int nouveau_ttm_mmap(struct file *, struct vm_area_struct *); int nouveau_ttm_global_init(struct nouveau_drm *); void nouveau_ttm_global_release(struct nouveau_drm *); -- 2.11.0