[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / drivers / gpu / drm / nouveau / nouveau_prime.c

/*
 * Copyright 2011 Red Hat Inc.
 *
 * 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 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 HOLDER(S) OR AUTHOR(S) 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.
 *
 * Authors: Dave Airlie
 */

#include <linux/dma-buf.h>

#include <drm/drmP.h>

#include "nouveau_drm.h"
#include "nouveau_gem.h"

static struct sg_table *nouveau_gem_map_dma_buf(struct dma_buf_attachment *attachment,
					  enum dma_data_direction dir)
{
	struct nouveau_bo *nvbo = attachment->dmabuf->priv;
	struct drm_device *dev = nvbo->gem->dev;
	int npages = nvbo->bo.num_pages;
	struct sg_table *sg;
	int nents;

	mutex_lock(&dev->struct_mutex);
	sg = drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
	nents = dma_map_sg(attachment->dev, sg->sgl, sg->nents, dir);
	mutex_unlock(&dev->struct_mutex);
	return sg;
}

static void nouveau_gem_unmap_dma_buf(struct dma_buf_attachment *attachment,
				      struct sg_table *sg, enum dma_data_direction dir)
{
	dma_unmap_sg(attachment->dev, sg->sgl, sg->nents, dir);
	sg_free_table(sg);
	kfree(sg);
}

static void nouveau_gem_dmabuf_release(struct dma_buf *dma_buf)
{
	struct nouveau_bo *nvbo = dma_buf->priv;

	if (nvbo->gem->export_dma_buf == dma_buf) {
		nvbo->gem->export_dma_buf = NULL;
		drm_gem_object_unreference_unlocked(nvbo->gem);
	}
}

static void *nouveau_gem_kmap_atomic(struct dma_buf *dma_buf, unsigned long page_num)
{
	return NULL;
}

static void nouveau_gem_kunmap_atomic(struct dma_buf *dma_buf, unsigned long page_num, void *addr)
{

}
static void *nouveau_gem_kmap(struct dma_buf *dma_buf, unsigned long page_num)
{
	return NULL;
}

static void nouveau_gem_kunmap(struct dma_buf *dma_buf, unsigned long page_num, void *addr)
{

}

static int nouveau_gem_prime_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma)
{
	return -EINVAL;
}

static void *nouveau_gem_prime_vmap(struct dma_buf *dma_buf)
{
	struct nouveau_bo *nvbo = dma_buf->priv;
	struct drm_device *dev = nvbo->gem->dev;
	int ret;

	mutex_lock(&dev->struct_mutex);
	if (nvbo->vmapping_count) {
		nvbo->vmapping_count++;
		goto out_unlock;
	}

	ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
			  &nvbo->dma_buf_vmap);
	if (ret) {
		mutex_unlock(&dev->struct_mutex);
		return ERR_PTR(ret);
	}
	nvbo->vmapping_count = 1;
out_unlock:
	mutex_unlock(&dev->struct_mutex);
	return nvbo->dma_buf_vmap.virtual;
}

static void nouveau_gem_prime_vunmap(struct dma_buf *dma_buf, void *vaddr)
{
	struct nouveau_bo *nvbo = dma_buf->priv;
	struct drm_device *dev = nvbo->gem->dev;

	mutex_lock(&dev->struct_mutex);
	nvbo->vmapping_count--;
	if (nvbo->vmapping_count == 0) {
		ttm_bo_kunmap(&nvbo->dma_buf_vmap);
	}
	mutex_unlock(&dev->struct_mutex);
}

static const struct dma_buf_ops nouveau_dmabuf_ops =  {
	.map_dma_buf = nouveau_gem_map_dma_buf,
	.unmap_dma_buf = nouveau_gem_unmap_dma_buf,
	.release = nouveau_gem_dmabuf_release,
	.kmap = nouveau_gem_kmap,
	.kmap_atomic = nouveau_gem_kmap_atomic,
	.kunmap = nouveau_gem_kunmap,
	.kunmap_atomic = nouveau_gem_kunmap_atomic,
	.mmap = nouveau_gem_prime_mmap,
	.vmap = nouveau_gem_prime_vmap,
	.vunmap = nouveau_gem_prime_vunmap,
};

static int
nouveau_prime_new(struct drm_device *dev,
		  size_t size,
		  struct sg_table *sg,
		  struct nouveau_bo **pnvbo)
{
	struct nouveau_bo *nvbo;
	u32 flags = 0;
	int ret;

	flags = TTM_PL_FLAG_TT;

	ret = nouveau_bo_new(dev, size, 0, flags, 0, 0,
			     sg, 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_GART;
	nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size);
	if (!nvbo->gem) {
		nouveau_bo_ref(NULL, pnvbo);
		return -ENOMEM;
	}

	nvbo->gem->driver_private = nvbo;
	return 0;
}

struct dma_buf *nouveau_gem_prime_export(struct drm_device *dev,
				struct drm_gem_object *obj, int flags)
{
	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
	int ret = 0;

	/* pin buffer into GTT */
	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT);
	if (ret)
		return ERR_PTR(-EINVAL);

	return dma_buf_export(nvbo, &nouveau_dmabuf_ops, obj->size, flags);
}

struct drm_gem_object *nouveau_gem_prime_import(struct drm_device *dev,
				struct dma_buf *dma_buf)
{
	struct dma_buf_attachment *attach;
	struct sg_table *sg;
	struct nouveau_bo *nvbo;
	int ret;

	if (dma_buf->ops == &nouveau_dmabuf_ops) {
		nvbo = dma_buf->priv;
		if (nvbo->gem) {
			if (nvbo->gem->dev == dev) {
				drm_gem_object_reference(nvbo->gem);
				return nvbo->gem;
			}
		}
	}
	/* need to attach */
	attach = dma_buf_attach(dma_buf, dev->dev);
	if (IS_ERR(attach))
		return ERR_PTR(PTR_ERR(attach));

	sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
	if (IS_ERR(sg)) {
		ret = PTR_ERR(sg);
		goto fail_detach;
	}

	ret = nouveau_prime_new(dev, dma_buf->size, sg, &nvbo);
	if (ret)
		goto fail_unmap;

	nvbo->gem->import_attach = attach;

	return nvbo->gem;

fail_unmap:
	dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL);
fail_detach:
	dma_buf_detach(dma_buf, attach);
	return ERR_PTR(ret);
}
Commit	Line	Data
e9bf5f36 DA	1	/*
	2	* Copyright 2011 Red Hat Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	* Authors: Dave Airlie
	23	*/
22b33e8e	24
77145f1c	25	#include <linux/dma-buf.h>
22b33e8e	26
612a9aab	27	#include <drm/drmP.h>
22b33e8e	28
77145f1c BS	29	#include "nouveau_drm.h"
77145f1c BS	30	#include "nouveau_gem.h"
22b33e8e DA	31
	32	static struct sg_table nouveau_gem_map_dma_buf(struct dma_buf_attachment attachment,
	33	enum dma_data_direction dir)
	34	{
	35	struct nouveau_bo *nvbo = attachment->dmabuf->priv;
	36	struct drm_device *dev = nvbo->gem->dev;
	37	int npages = nvbo->bo.num_pages;
	38	struct sg_table *sg;
	39	int nents;
	40
	41	mutex_lock(&dev->struct_mutex);
	42	sg = drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
	43	nents = dma_map_sg(attachment->dev, sg->sgl, sg->nents, dir);
	44	mutex_unlock(&dev->struct_mutex);
	45	return sg;
	46	}
	47
	48	static void nouveau_gem_unmap_dma_buf(struct dma_buf_attachment *attachment,
	49	struct sg_table *sg, enum dma_data_direction dir)
	50	{
	51	dma_unmap_sg(attachment->dev, sg->sgl, sg->nents, dir);
	52	sg_free_table(sg);
	53	kfree(sg);
	54	}
	55
	56	static void nouveau_gem_dmabuf_release(struct dma_buf *dma_buf)
	57	{
	58	struct nouveau_bo *nvbo = dma_buf->priv;
	59
	60	if (nvbo->gem->export_dma_buf == dma_buf) {
	61	nvbo->gem->export_dma_buf = NULL;
	62	drm_gem_object_unreference_unlocked(nvbo->gem);
	63	}
	64	}
	65
	66	static void nouveau_gem_kmap_atomic(struct dma_buf dma_buf, unsigned long page_num)
	67	{
	68	return NULL;
	69	}
	70
	71	static void nouveau_gem_kunmap_atomic(struct dma_buf dma_buf, unsigned long page_num, void addr)
	72	{
	73
	74	}
	75	static void nouveau_gem_kmap(struct dma_buf dma_buf, unsigned long page_num)
	76	{
	77	return NULL;
	78	}
	79
	80	static void nouveau_gem_kunmap(struct dma_buf dma_buf, unsigned long page_num, void addr)
	81	{
	82
	83	}
	84
e1bbc4bf DA	85	static int nouveau_gem_prime_mmap(struct dma_buf dma_buf, struct vm_area_struct vma)
	86	{
	87	return -EINVAL;
	88	}
	89
35916ace DA	90	static void nouveau_gem_prime_vmap(struct dma_buf dma_buf)
	91	{
	92	struct nouveau_bo *nvbo = dma_buf->priv;
	93	struct drm_device *dev = nvbo->gem->dev;
	94	int ret;
	95
	96	mutex_lock(&dev->struct_mutex);
	97	if (nvbo->vmapping_count) {
	98	nvbo->vmapping_count++;
	99	goto out_unlock;
	100	}
	101
	102	ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
	103	&nvbo->dma_buf_vmap);
	104	if (ret) {
	105	mutex_unlock(&dev->struct_mutex);
	106	return ERR_PTR(ret);
	107	}
	108	nvbo->vmapping_count = 1;
	109	out_unlock:
	110	mutex_unlock(&dev->struct_mutex);
	111	return nvbo->dma_buf_vmap.virtual;
	112	}
	113
	114	static void nouveau_gem_prime_vunmap(struct dma_buf dma_buf, void vaddr)
	115	{
	116	struct nouveau_bo *nvbo = dma_buf->priv;
	117	struct drm_device *dev = nvbo->gem->dev;
	118
	119	mutex_lock(&dev->struct_mutex);
	120	nvbo->vmapping_count--;
	121	if (nvbo->vmapping_count == 0) {
	122	ttm_bo_kunmap(&nvbo->dma_buf_vmap);
	123	}
	124	mutex_unlock(&dev->struct_mutex);
	125	}
	126
41ceeeb2	127	static const struct dma_buf_ops nouveau_dmabuf_ops = {
22b33e8e DA	128	.map_dma_buf = nouveau_gem_map_dma_buf,
	129	.unmap_dma_buf = nouveau_gem_unmap_dma_buf,
	130	.release = nouveau_gem_dmabuf_release,
	131	.kmap = nouveau_gem_kmap,
	132	.kmap_atomic = nouveau_gem_kmap_atomic,
	133	.kunmap = nouveau_gem_kunmap,
	134	.kunmap_atomic = nouveau_gem_kunmap_atomic,
e1bbc4bf	135	.mmap = nouveau_gem_prime_mmap,
35916ace DA	136	.vmap = nouveau_gem_prime_vmap,
35916ace DA	137	.vunmap = nouveau_gem_prime_vunmap,
22b33e8e DA	138	};
	139
	140	static int
	141	nouveau_prime_new(struct drm_device *dev,
	142	size_t size,
	143	struct sg_table *sg,
	144	struct nouveau_bo **pnvbo)
	145	{
	146	struct nouveau_bo *nvbo;
	147	u32 flags = 0;
	148	int ret;
	149
	150	flags = TTM_PL_FLAG_TT;
	151
	152	ret = nouveau_bo_new(dev, size, 0, flags, 0, 0,
	153	sg, pnvbo);
	154	if (ret)
	155	return ret;
	156	nvbo = *pnvbo;
	157
	158	/* we restrict allowed domains on nv50+ to only the types
	159	* that were requested at creation time. not possibly on
	160	* earlier chips without busting the ABI.
	161	*/
	162	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
	163	nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size);
	164	if (!nvbo->gem) {
	165	nouveau_bo_ref(NULL, pnvbo);
	166	return -ENOMEM;
	167	}
	168
	169	nvbo->gem->driver_private = nvbo;
	170	return 0;
	171	}
	172
	173	struct dma_buf nouveau_gem_prime_export(struct drm_device dev,
	174	struct drm_gem_object *obj, int flags)
	175	{
	176	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
	177	int ret = 0;
	178
	179	/* pin buffer into GTT */
	180	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT);
	181	if (ret)
	182	return ERR_PTR(-EINVAL);
	183
	184	return dma_buf_export(nvbo, &nouveau_dmabuf_ops, obj->size, flags);
	185	}
	186
	187	struct drm_gem_object nouveau_gem_prime_import(struct drm_device dev,
	188	struct dma_buf *dma_buf)
	189	{
	190	struct dma_buf_attachment *attach;
	191	struct sg_table *sg;
	192	struct nouveau_bo *nvbo;
	193	int ret;
	194
	195	if (dma_buf->ops == &nouveau_dmabuf_ops) {
	196	nvbo = dma_buf->priv;
	197	if (nvbo->gem) {
	198	if (nvbo->gem->dev == dev) {
	199	drm_gem_object_reference(nvbo->gem);
	200	return nvbo->gem;
	201	}
202	}
203	}
204	/* need to attach */
205	attach = dma_buf_attach(dma_buf, dev->dev);
206	if (IS_ERR(attach))
207	return ERR_PTR(PTR_ERR(attach));
208
209	sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
210	if (IS_ERR(sg)) {
211	ret = PTR_ERR(sg);
212	goto fail_detach;
213	}
214
215	ret = nouveau_prime_new(dev, dma_buf->size, sg, &nvbo);
216	if (ret)
217	goto fail_unmap;
218
219	nvbo->gem->import_attach = attach;
220
221	return nvbo->gem;
222
223	fail_unmap:
224	dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL);
225	fail_detach:
226	dma_buf_detach(dma_buf, attach);
227	return ERR_PTR(ret);
228	}
229