diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_resource.c')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 209 |
1 files changed, 203 insertions, 6 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c index 9b5ea2ac7dd..9757b57f838 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c @@ -88,6 +88,11 @@ struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) return res; } +struct vmw_resource * +vmw_resource_reference_unless_doomed(struct vmw_resource *res) +{ + return kref_get_unless_zero(&res->kref) ? res : NULL; +} /** * vmw_resource_release_id - release a resource id to the id manager. @@ -136,8 +141,12 @@ static void vmw_resource_release(struct kref *kref) vmw_dmabuf_unreference(&res->backup); } - if (likely(res->hw_destroy != NULL)) + if (likely(res->hw_destroy != NULL)) { res->hw_destroy(res); + mutex_lock(&dev_priv->binding_mutex); + vmw_context_binding_res_list_kill(&res->binding_head); + mutex_unlock(&dev_priv->binding_mutex); + } id = res->id; if (res->res_free != NULL) @@ -215,6 +224,7 @@ int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, res->func = func; INIT_LIST_HEAD(&res->lru_head); INIT_LIST_HEAD(&res->mob_head); + INIT_LIST_HEAD(&res->binding_head); res->id = -1; res->backup = NULL; res->backup_offset = 0; @@ -417,8 +427,7 @@ int vmw_dmabuf_init(struct vmw_private *dev_priv, INIT_LIST_HEAD(&vmw_bo->res_list); ret = ttm_bo_init(bdev, &vmw_bo->base, size, - (user) ? ttm_bo_type_device : - ttm_bo_type_kernel, placement, + ttm_bo_type_device, placement, 0, interruptible, NULL, acc_size, NULL, bo_free); return ret; @@ -441,6 +450,21 @@ static void vmw_user_dmabuf_release(struct ttm_base_object **p_base) ttm_bo_unref(&bo); } +static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object *base, + enum ttm_ref_type ref_type) +{ + struct vmw_user_dma_buffer *user_bo; + user_bo = container_of(base, struct vmw_user_dma_buffer, prime.base); + + switch (ref_type) { + case TTM_REF_SYNCCPU_WRITE: + ttm_bo_synccpu_write_release(&user_bo->dma.base); + break; + default: + BUG(); + } +} + /** * vmw_user_dmabuf_alloc - Allocate a user dma buffer * @@ -471,6 +495,8 @@ int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv, } ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size, + (dev_priv->has_mob) ? + &vmw_sys_placement : &vmw_vram_sys_placement, true, &vmw_user_dmabuf_destroy); if (unlikely(ret != 0)) @@ -482,7 +508,8 @@ int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv, &user_bo->prime, shareable, ttm_buffer_type, - &vmw_user_dmabuf_release, NULL); + &vmw_user_dmabuf_release, + &vmw_user_dmabuf_ref_obj_release); if (unlikely(ret != 0)) { ttm_bo_unref(&tmp); goto out_no_base_object; @@ -515,6 +542,130 @@ int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo, vmw_user_bo->prime.base.shareable) ? 0 : -EPERM; } +/** + * vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu + * access, idling previous GPU operations on the buffer and optionally + * blocking it for further command submissions. + * + * @user_bo: Pointer to the buffer object being grabbed for CPU access + * @tfile: Identifying the caller. + * @flags: Flags indicating how the grab should be performed. + * + * A blocking grab will be automatically released when @tfile is closed. + */ +static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer *user_bo, + struct ttm_object_file *tfile, + uint32_t flags) +{ + struct ttm_buffer_object *bo = &user_bo->dma.base; + bool existed; + int ret; + + if (flags & drm_vmw_synccpu_allow_cs) { + struct ttm_bo_device *bdev = bo->bdev; + + spin_lock(&bdev->fence_lock); + ret = ttm_bo_wait(bo, false, true, + !!(flags & drm_vmw_synccpu_dontblock)); + spin_unlock(&bdev->fence_lock); + return ret; + } + + ret = ttm_bo_synccpu_write_grab + (bo, !!(flags & drm_vmw_synccpu_dontblock)); + if (unlikely(ret != 0)) + return ret; + + ret = ttm_ref_object_add(tfile, &user_bo->prime.base, + TTM_REF_SYNCCPU_WRITE, &existed); + if (ret != 0 || existed) + ttm_bo_synccpu_write_release(&user_bo->dma.base); + + return ret; +} + +/** + * vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access, + * and unblock command submission on the buffer if blocked. + * + * @handle: Handle identifying the buffer object. + * @tfile: Identifying the caller. + * @flags: Flags indicating the type of release. + */ +static int vmw_user_dmabuf_synccpu_release(uint32_t handle, + struct ttm_object_file *tfile, + uint32_t flags) +{ + if (!(flags & drm_vmw_synccpu_allow_cs)) + return ttm_ref_object_base_unref(tfile, handle, + TTM_REF_SYNCCPU_WRITE); + + return 0; +} + +/** + * vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu + * functionality. + * + * @dev: Identifies the drm device. + * @data: Pointer to the ioctl argument. + * @file_priv: Identifies the caller. + * + * This function checks the ioctl arguments for validity and calls the + * relevant synccpu functions. + */ +int vmw_user_dmabuf_synccpu_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_vmw_synccpu_arg *arg = + (struct drm_vmw_synccpu_arg *) data; + struct vmw_dma_buffer *dma_buf; + struct vmw_user_dma_buffer *user_bo; + struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; + int ret; + + if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0 + || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write | + drm_vmw_synccpu_dontblock | + drm_vmw_synccpu_allow_cs)) != 0) { + DRM_ERROR("Illegal synccpu flags.\n"); + return -EINVAL; + } + + switch (arg->op) { + case drm_vmw_synccpu_grab: + ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &dma_buf); + if (unlikely(ret != 0)) + return ret; + + user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, + dma); + ret = vmw_user_dmabuf_synccpu_grab(user_bo, tfile, arg->flags); + vmw_dmabuf_unreference(&dma_buf); + if (unlikely(ret != 0 && ret != -ERESTARTSYS && + ret != -EBUSY)) { + DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n", + (unsigned int) arg->handle); + return ret; + } + break; + case drm_vmw_synccpu_release: + ret = vmw_user_dmabuf_synccpu_release(arg->handle, tfile, + arg->flags); + if (unlikely(ret != 0)) { + DRM_ERROR("Failed synccpu release on handle 0x%08x.\n", + (unsigned int) arg->handle); + return ret; + } + break; + default: + DRM_ERROR("Invalid synccpu operation.\n"); + return -EINVAL; + } + + return 0; +} + int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { @@ -591,7 +742,8 @@ int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, } int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, - struct vmw_dma_buffer *dma_buf) + struct vmw_dma_buffer *dma_buf, + uint32_t *handle) { struct vmw_user_dma_buffer *user_bo; @@ -599,6 +751,8 @@ int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, return -EINVAL; user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma); + + *handle = user_bo->prime.base.hash.key; return ttm_ref_object_add(tfile, &user_bo->prime.base, TTM_REF_USAGE, NULL); } @@ -1291,11 +1445,54 @@ void vmw_fence_single_bo(struct ttm_buffer_object *bo, * @mem: The truct ttm_mem_reg indicating to what memory * region the move is taking place. * - * For now does nothing. + * Evicts the Guest Backed hardware resource if the backup + * buffer is being moved out of MOB memory. + * Note that this function should not race with the resource + * validation code as long as it accesses only members of struct + * resource that remain static while bo::res is !NULL and + * while we have @bo reserved. struct resource::backup is *not* a + * static member. The resource validation code will take care + * to set @bo::res to NULL, while having @bo reserved when the + * buffer is no longer bound to the resource, so @bo:res can be + * used to determine whether there is a need to unbind and whether + * it is safe to unbind. */ void vmw_resource_move_notify(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) { + struct vmw_dma_buffer *dma_buf; + + if (mem == NULL) + return; + + if (bo->destroy != vmw_dmabuf_bo_free && + bo->destroy != vmw_user_dmabuf_destroy) + return; + + dma_buf = container_of(bo, struct vmw_dma_buffer, base); + + if (mem->mem_type != VMW_PL_MOB) { + struct vmw_resource *res, *n; + struct ttm_bo_device *bdev = bo->bdev; + struct ttm_validate_buffer val_buf; + + val_buf.bo = bo; + + list_for_each_entry_safe(res, n, &dma_buf->res_list, mob_head) { + + if (unlikely(res->func->unbind == NULL)) + continue; + + (void) res->func->unbind(res, true, &val_buf); + res->backup_dirty = true; + res->res_dirty = false; + list_del_init(&res->mob_head); + } + + spin_lock(&bdev->fence_lock); + (void) ttm_bo_wait(bo, false, false, false); + spin_unlock(&bdev->fence_lock); + } } /** |