path: root/drivers/gpu/drm/nouveau/nouveau_gem.c

/*
 * Copyright (C) 2008 Ben Skeggs.
 * 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 <subdev/fb.h>

#include "nouveau_drm.h"
#include "nouveau_dma.h"
#include "nouveau_fence.h"
#include "nouveau_abi16.h"

#include "nouveau_ttm.h"
#include "nouveau_gem.h"

void
nouveau_gem_object_del(struct drm_gem_object *gem)
{
	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
	struct ttm_buffer_object *bo = &nvbo->bo;

	if (gem->import_attach)
		drm_prime_gem_destroy(gem, nvbo->bo.sg);

	drm_gem_object_release(gem);

	/* reset filp so nouveau_bo_del_ttm() can test for it */
	gem->filp = NULL;
	ttm_bo_unref(&bo);
}

int
nouveau_gem_object_open(struct drm_gem_object *gem, struct drm_file *file_priv)
{
	struct nouveau_cli *cli = nouveau_cli(file_priv);
	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
	struct nouveau_vma *vma;
	int ret;

	if (!cli->base.vm)
		return 0;

	ret = ttm_bo_reserve(&nvbo->bo, false, false, false, 0);
	if (ret)
		return ret;

	vma = nouveau_bo_vma_find(nvbo, cli->base.vm);
	if (!vma) {
		vma = kzalloc(sizeof(*vma), GFP_KERNEL);
		if (!vma) {
			ret = -ENOMEM;
			goto out;
		}

		ret = nouveau_bo_vma_add(nvbo, cli->base.vm, vma);
		if (ret) {
			kfree(vma);
			goto out;
		}
	} else {
		vma->refcount++;
	}

out:
	ttm_bo_unreserve(&nvbo->bo);
	return ret;
}

static void
nouveau_gem_object_delete(void *data)
{
	struct nouveau_vma *vma = data;
	nouveau_vm_unmap(vma);
	nouveau_vm_put(vma);
	kfree(vma);
}

static void
nouveau_gem_object_unmap(struct nouveau_bo *nvbo, struct nouveau_vma *vma)
{
	const bool mapped = nvbo->bo.mem.mem_type != TTM_PL_SYSTEM;
	struct nouveau_fence *fence = NULL;

	list_del(&vma->head);

	if (mapped) {
		spin_lock(&nvbo->bo.bdev->fence_lock);
		fence = nouveau_fence_ref(nvbo->bo.sync_obj);
		spin_unlock(&nvbo->bo.bdev->fence_lock);
	}

	if (fence) {
		nouveau_fence_work(fence, nouveau_gem_object_delete, vma);
	} else {
		if (mapped)
			nouveau_vm_unmap(vma);
		nouveau_vm_put(vma);
		kfree(vma);
	}
	nouveau_fence_unref(&fence);
}

void
nouveau_gem_object_close(struct drm_gem_object *gem, struct drm_file *file_priv)
{
	struct nouveau_cli *cli = nouveau_cli(file_priv);
	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
	struct nouveau_vma *vma;
	int ret;

	if (!cli->base.vm)
		return;

	ret = ttm_bo_reserve(&nvbo->bo, false, false, false, 0);
	if (ret)
		return;

	vma = nouveau_bo_vma_find(nvbo, cli->base.vm);
	if (vma) {
		if (--vma->refcount == 0)
			nouveau_gem_object_unmap(nvbo, vma);
	}
	ttm_bo_unreserve(&nvbo->bo);
}

int
nouveau_gem_new(struct drm_device *dev, int size, int align, uint32_t domain,
		uint32_t tile_mode, uint32_t tile_flags,
		struct nouveau_bo **pnvbo)
{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_bo *nvbo;
	u32 flags = 0;
	int ret;

	if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
		flags |= TTM_PL_FLAG_VRAM;
	if (domain & NOUVEAU_GEM_DOMAIN_GART)
		flags |= TTM_PL_FLAG_TT;
	if (!flags || domain & NOUVEAU_GEM_DOMAIN_CPU)
		flags |= TTM_PL_FLAG_SYSTEM;

	ret = nouveau_bo_new(dev, size, align, flags, tile_mode,
			     tile_flags