/* * Copyright (C) 2015 Red Hat, Inc. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial * portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include <drm/ttm/ttm_execbuf_util.h> #include "virtgpu_drv.h" static int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,				       uint32_t *resid){#if 0	int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL); 	if (handle < 0)		return handle;#else	static int handle; 	/*	 * FIXME: dirty hack to avoid re-using IDs, virglrenderer	 * can't deal with that.  Needs fixing in virglrenderer, also	 * should figure a better way to handle that in the guest.	 */	handle++;#endif 	*resid = handle + 1;	return 0;} static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id){#if 0	ida_free(&vgdev->resource_ida, id - 1);#endif} static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo){	struct virtio_gpu_object *bo;	struct virtio_gpu_device *vgdev; 	bo = container_of(tbo, struct virtio_gpu_object, tbo);	vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private; 	if (bo->created)		virtio_gpu_cmd_unref_resource(vgdev, bo->hw_res_handle);	if (bo->pages)		virtio_gpu_object_free_sg_table(bo);	if (bo->vmap)		virtio_gpu_object_kunmap(bo);	drm_gem_object_release(&bo->gem_base);	virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);	kfree(bo);} static void virtio_gpu_init_ttm_placement(struct virtio_gpu_object *vgbo){	u32 c = 1; 	vgbo->placement.placement = &vgbo->placement_code;	vgbo->placement.busy_placement = &vgbo->placement_code;	vgbo->placement_code.fpfn = 0;	vgbo->placement_code.lpfn = 0;	vgbo->placement_code.flags =		TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT |		TTM_PL_FLAG_NO_EVICT;	vgbo->placement.num_placement = c;	vgbo->placement.num_busy_placement = c; } int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,			     struct virtio_gpu_object_params *params,			     struct virtio_gpu_object **bo_ptr,			     struct virtio_gpu_fence *fence){	struct virtio_gpu_object *bo;	size_t acc_size;	int ret; 	*bo_ptr = NULL; 	acc_size = ttm_bo_dma_acc_size(&vgdev->mman.bdev, params->size,				       sizeof(struct virtio_gpu_object)); 	bo = kzalloc(sizeof(struct virtio_gpu_object), GFP_KERNEL);	if (bo == NULL)		return -ENOMEM;	ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle);	if (ret < 0) {		kfree(bo);		return ret;	}	params->size = roundup(params->size, PAGE_SIZE);	ret = drm_gem_object_init(vgdev->ddev, &bo->gem_base, params->size);	if (ret != 0) {		virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);		kfree(bo);		return ret;	}	bo->dumb = params->dumb; 	if (params->virgl) {		virtio_gpu_cmd_resource_create_3d(vgdev, bo, params, fence);	} else {		virtio_gpu_cmd_create_resource(vgdev, bo, params, fence);	} 	virtio_gpu_init_ttm_placement(bo);	ret = ttm_bo_init(&vgdev->mman.bdev, &bo->tbo, params->size,			  ttm_bo_type_device, &bo->placement, 0,			  true, acc_size, NULL, NULL,			  &virtio_gpu_ttm_bo_destroy);	/* ttm_bo_init failure will call the destroy */	if (ret != 0)		return ret; 	if (fence) {		struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;		struct list_head validate_list;		struct ttm_validate_buffer mainbuf;		struct ww_acquire_ctx ticket;		unsigned long irq_flags;		bool signaled; 		INIT_LIST_HEAD(&validate_list);		memset(&mainbuf, 0, sizeof(struct ttm_validate_buffer)); 		/* use a gem reference since unref list undoes them */		drm_gem_object_get(&bo->gem_base);		mainbuf.bo = &bo->tbo;		list_add(&mainbuf.head, &validate_list); 		ret = virtio_gpu_object_list_validate(&ticket, &validate_list);		if (ret == 0) {			spin_lock_irqsave(&drv->lock, irq_flags);			signaled = virtio_fence_signaled(&fence->f);			if (!signaled)				/* virtio create command still in flight */				ttm_eu_fence_buffer_objects(&ticket, &validate_list,							    &fence->f);			spin_unlock_irqrestore(&drv->lock, irq_flags);			if (signaled)				/* virtio create command finished */				ttm_eu_backoff_reservation(&ticket, &validate_list);		}		virtio_gpu_unref_list(&validate_list);	} 	*bo_ptr = bo;	return 0;} void virtio_gpu_object_kunmap(struct virtio_gpu_object *bo){	bo->vmap = NULL;	ttm_bo_kunmap(&bo->kmap);} int virtio_gpu_object_kmap(struct virtio_gpu_object *bo){	bool is_iomem;	int r; 	WARN_ON(bo->vmap); 	r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);	if (r)		return r;	bo->vmap = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);	return 0;} int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,				   struct virtio_gpu_object *bo){	int ret;	struct page **pages = bo->tbo.ttm->pages;	int nr_pages = bo->tbo.num_pages;	struct ttm_operation_ctx ctx = {		.interruptible = false,		.no_wait_gpu = false	}; 	/* wtf swapping */	if (bo->pages)		return 0; 	if (bo->tbo.ttm->state == tt_unpopulated)		bo->tbo.ttm->bdev->driver->ttm_tt_populate(bo->tbo.ttm, &ctx);	bo->pages = kmalloc(sizeof(struct sg_table), GFP_KERNEL);	if (!bo->pages)		goto out; 	ret = sg_alloc_table_from_pages(bo->pages, pages, nr_pages, 0,					nr_pages << PAGE_SHIFT, GFP_KERNEL);	if (ret)		goto out;	return 0;out:	kfree(bo->pages);	bo->pages = NULL;	return -ENOMEM;} void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo){	sg_free_table(bo->pages);	kfree(bo->pages);	bo->pages = NULL;} int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait){	int r; 	r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);	if (unlikely(r != 0))		return r;	r = ttm_bo_wait(&bo->tbo, true, no_wait);	ttm_bo_unreserve(&bo->tbo);	return r;}