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"

int
nouveau_gem_object_new(struct drm_gem_object *gem)
{
	return 0;
}

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

	if (!nvbo)
		return;
	nvbo->gem = NULL;

	if (unlikely(nvbo->pin_refcnt)) {
		nvbo->pin_refcnt = 1;
		nouveau_bo_unpin(nvbo);
	}

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

	ttm_bo_unref(&bo);

	drm_gem_object_release(gem);
	kfree(gem);
}

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;
}

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_bo_vma_del(nvbo, vma);
			kfree(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, NULL, pnvbo);
	if (ret)
		return ret;
	nvbo = *pnvbo;

	/* we restrict allowed domains on nv50+ to only the types
	 * that were requested at creation time.  not possibly on
	 * earlier chips without busting the ABI.
	 */
	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_VRAM |
			      NOUVEAU_GEM_DOMAIN_GART;
	if (nv_device(drm->device)->card_type >= NV_50)
		nvbo->valid_domains &= domain;

	nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size);
	if (!nvbo->gem) {
		nouveau_bo_ref(NULL, pnvbo);
		return -ENOMEM;
	}

	nvbo->bo.persistent_swap_storage = nvbo->gem->filp;
	nvbo->gem->driver_private = nvbo;
	return 0;
}

static int
nouveau_gem_info(struct drm_file *file_priv, struct drm_gem_object *gem,
		 struct drm_nouveau_gem_info *rep)
{
	struct nouveau_cli *cli = nouveau_cli(file_priv);
	struct nouveau_bo *<