[GitHub/mt8127/android_kernel_alcatel_ttab.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 "drmP.h"
#include "drm.h"

#include "nouveau_drv.h"
#include "nouveau_drm.h"
#include "nouveau_dma.h"

#include <linux/dma-buf.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 DA	24
	25	#include "drmP.h"
	26	#include "drm.h"
	27
	28	#include "nouveau_drv.h"
	29	#include "nouveau_drm.h"
	30	#include "nouveau_dma.h"
	31
	32	#include <linux/dma-buf.h>
	33
	34	static struct sg_table nouveau_gem_map_dma_buf(struct dma_buf_attachment attachment,
	35	enum dma_data_direction dir)
	36	{
	37	struct nouveau_bo *nvbo = attachment->dmabuf->priv;
	38	struct drm_device *dev = nvbo->gem->dev;
	39	int npages = nvbo->bo.num_pages;
	40	struct sg_table *sg;
	41	int nents;
	42
	43	mutex_lock(&dev->struct_mutex);
	44	sg = drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
	45	nents = dma_map_sg(attachment->dev, sg->sgl, sg->nents, dir);
	46	mutex_unlock(&dev->struct_mutex);
	47	return sg;
	48	}
	49
	50	static void nouveau_gem_unmap_dma_buf(struct dma_buf_attachment *attachment,
	51	struct sg_table *sg, enum dma_data_direction dir)
	52	{
	53	dma_unmap_sg(attachment->dev, sg->sgl, sg->nents, dir);
	54	sg_free_table(sg);
	55	kfree(sg);
	56	}
	57
	58	static void nouveau_gem_dmabuf_release(struct dma_buf *dma_buf)
	59	{
	60	struct nouveau_bo *nvbo = dma_buf->priv;
	61
	62	if (nvbo->gem->export_dma_buf == dma_buf) {
	63	nvbo->gem->export_dma_buf = NULL;
	64	drm_gem_object_unreference_unlocked(nvbo->gem);
	65	}
	66	}
	67
	68	static void nouveau_gem_kmap_atomic(struct dma_buf dma_buf, unsigned long page_num)
	69	{
	70	return NULL;
	71	}
	72
	73	static void nouveau_gem_kunmap_atomic(struct dma_buf dma_buf, unsigned long page_num, void addr)
	74	{
	75
	76	}
	77	static void nouveau_gem_kmap(struct dma_buf dma_buf, unsigned long page_num)
	78	{
	79	return NULL;
	80	}
	81
	82	static void nouveau_gem_kunmap(struct dma_buf dma_buf, unsigned long page_num, void addr)
	83	{
	84
	85	}
	86
e1bbc4bf DA	87	static int nouveau_gem_prime_mmap(struct dma_buf dma_buf, struct vm_area_struct vma)
	88	{
	89	return -EINVAL;
	90	}
	91
35916ace DA	92	static void nouveau_gem_prime_vmap(struct dma_buf dma_buf)
	93	{
	94	struct nouveau_bo *nvbo = dma_buf->priv;
	95	struct drm_device *dev = nvbo->gem->dev;
	96	int ret;
	97
	98	mutex_lock(&dev->struct_mutex);
	99	if (nvbo->vmapping_count) {
	100	nvbo->vmapping_count++;
	101	goto out_unlock;
	102	}
	103
	104	ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
	105	&nvbo->dma_buf_vmap);
	106	if (ret) {
	107	mutex_unlock(&dev->struct_mutex);
	108	return ERR_PTR(ret);
	109	}
	110	nvbo->vmapping_count = 1;
	111	out_unlock:
	112	mutex_unlock(&dev->struct_mutex);
	113	return nvbo->dma_buf_vmap.virtual;
	114	}
	115
	116	static void nouveau_gem_prime_vunmap(struct dma_buf dma_buf, void vaddr)
	117	{
	118	struct nouveau_bo *nvbo = dma_buf->priv;
	119	struct drm_device *dev = nvbo->gem->dev;
	120
	121	mutex_lock(&dev->struct_mutex);
	122	nvbo->vmapping_count--;
	123	if (nvbo->vmapping_count == 0) {
	124	ttm_bo_kunmap(&nvbo->dma_buf_vmap);
	125	}
	126	mutex_unlock(&dev->struct_mutex);
	127	}
	128
41ceeeb2	129	static const struct dma_buf_ops nouveau_dmabuf_ops = {
22b33e8e DA	130	.map_dma_buf = nouveau_gem_map_dma_buf,
	131	.unmap_dma_buf = nouveau_gem_unmap_dma_buf,
	132	.release = nouveau_gem_dmabuf_release,
	133	.kmap = nouveau_gem_kmap,
	134	.kmap_atomic = nouveau_gem_kmap_atomic,
	135	.kunmap = nouveau_gem_kunmap,
	136	.kunmap_atomic = nouveau_gem_kunmap_atomic,
e1bbc4bf	137	.mmap = nouveau_gem_prime_mmap,
35916ace DA	138	.vmap = nouveau_gem_prime_vmap,
35916ace DA	139	.vunmap = nouveau_gem_prime_vunmap,
22b33e8e DA	140	};
	141
	142	static int
	143	nouveau_prime_new(struct drm_device *dev,
	144	size_t size,
	145	struct sg_table *sg,
	146	struct nouveau_bo **pnvbo)
	147	{
	148	struct nouveau_bo *nvbo;
	149	u32 flags = 0;
	150	int ret;
	151
	152	flags = TTM_PL_FLAG_TT;
	153
	154	ret = nouveau_bo_new(dev, size, 0, flags, 0, 0,
	155	sg, pnvbo);
	156	if (ret)
	157	return ret;
	158	nvbo = *pnvbo;
	159
	160	/* we restrict allowed domains on nv50+ to only the types
	161	* that were requested at creation time. not possibly on
	162	* earlier chips without busting the ABI.
	163	*/
	164	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
	165	nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size);
	166	if (!nvbo->gem) {
	167	nouveau_bo_ref(NULL, pnvbo);
	168	return -ENOMEM;
	169	}
	170
	171	nvbo->gem->driver_private = nvbo;
	172	return 0;
	173	}
	174
	175	struct dma_buf nouveau_gem_prime_export(struct drm_device dev,
	176	struct drm_gem_object *obj, int flags)
	177	{
	178	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
	179	int ret = 0;
	180
	181	/* pin buffer into GTT */
	182	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT);
	183	if (ret)
	184	return ERR_PTR(-EINVAL);
	185
	186	return dma_buf_export(nvbo, &nouveau_dmabuf_ops, obj->size, flags);
	187	}
	188
	189	struct drm_gem_object nouveau_gem_prime_import(struct drm_device dev,
	190	struct dma_buf *dma_buf)
	191	{
	192	struct dma_buf_attachment *attach;
	193	struct sg_table *sg;
	194	struct nouveau_bo *nvbo;
	195	int ret;
	196
	197	if (dma_buf->ops == &nouveau_dmabuf_ops) {
	198	nvbo = dma_buf->priv;
	199	if (nvbo->gem) {
	200	if (nvbo->gem->dev == dev) {
	201	drm_gem_object_reference(nvbo->gem);
	202	return nvbo->gem;
	203	}
204	}
205	}
206	/* need to attach */
207	attach = dma_buf_attach(dma_buf, dev->dev);
208	if (IS_ERR(attach))
209	return ERR_PTR(PTR_ERR(attach));
210
211	sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
212	if (IS_ERR(sg)) {
213	ret = PTR_ERR(sg);
214	goto fail_detach;
215	}
216
217	ret = nouveau_prime_new(dev, dma_buf->size, sg, &nvbo);
218	if (ret)
219	goto fail_unmap;
220
221	nvbo->gem->import_attach = attach;
222
223	return nvbo->gem;
224
225	fail_unmap:
226	dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL);
227	fail_detach:
228	dma_buf_detach(dma_buf, attach);
229	return ERR_PTR(ret);
230	}
231