[deliverable/linux.git] / drivers / gpu / drm / rockchip / rockchip_drm_gem.c

/*
 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
 * Author:Mark Yao <mark.yao@rock-chips.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <drm/drm.h>
#include <drm/drmP.h>
#include <drm/drm_gem.h>
#include <drm/drm_vma_manager.h>

#include "rockchip_drm_drv.h"
#include "rockchip_drm_gem.h"

static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj,
				  bool alloc_kmap)
{
	struct drm_gem_object *obj = &rk_obj->base;
	struct drm_device *drm = obj->dev;

	rk_obj->dma_attrs = DMA_ATTR_WRITE_COMBINE;

	if (!alloc_kmap)
		rk_obj->dma_attrs |= DMA_ATTR_NO_KERNEL_MAPPING;

	rk_obj->kvaddr = dma_alloc_attrs(drm->dev, obj->size,
					 &rk_obj->dma_addr, GFP_KERNEL,
					 rk_obj->dma_attrs);
	if (!rk_obj->kvaddr) {
		DRM_ERROR("failed to allocate %zu byte dma buffer", obj->size);
		return -ENOMEM;
	}

	return 0;
}

static void rockchip_gem_free_buf(struct rockchip_gem_object *rk_obj)
{
	struct drm_gem_object *obj = &rk_obj->base;
	struct drm_device *drm = obj->dev;

	dma_free_attrs(drm->dev, obj->size, rk_obj->kvaddr, rk_obj->dma_addr,
		       rk_obj->dma_attrs);
}

static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
					struct vm_area_struct *vma)

{
	int ret;
	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
	struct drm_device *drm = obj->dev;

	/*
	 * dma_alloc_attrs() allocated a struct page table for rk_obj, so clear
	 * VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
	 */
	vma->vm_flags &= ~VM_PFNMAP;
	vma->vm_pgoff = 0;

	ret = dma_mmap_attrs(drm->dev, vma, rk_obj->kvaddr, rk_obj->dma_addr,
			     obj->size, rk_obj->dma_attrs);
	if (ret)
		drm_gem_vm_close(vma);

	return ret;
}

int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
			  struct vm_area_struct *vma)
{
	int ret;

	ret = drm_gem_mmap_obj(obj, obj->size, vma);
	if (ret)
		return ret;

	return rockchip_drm_gem_object_mmap(obj, vma);
}

/* drm driver mmap file operations */
int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma)
{
	struct drm_gem_object *obj;
	int ret;

	ret = drm_gem_mmap(filp, vma);
	if (ret)
		return ret;

	obj = vma->vm_private_data;

	return rockchip_drm_gem_object_mmap(obj, vma);
}

struct rockchip_gem_object *
	rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
				   bool alloc_kmap)
{
	struct rockchip_gem_object *rk_obj;
	struct drm_gem_object *obj;
	int ret;

	size = round_up(size, PAGE_SIZE);

	rk_obj = kzalloc(sizeof(*rk_obj), GFP_KERNEL);
	if (!rk_obj)
		return ERR_PTR(-ENOMEM);

	obj = &rk_obj->base;

	drm_gem_private_object_init(drm, obj, size);

	ret = rockchip_gem_alloc_buf(rk_obj, alloc_kmap);
	if (ret)
		goto err_free_rk_obj;

	return rk_obj;

err_free_rk_obj:
	kfree(rk_obj);
	return ERR_PTR(ret);
}

/*
 * rockchip_gem_free_object - (struct drm_driver)->gem_free_object callback
 * function
 */
void rockchip_gem_free_object(struct drm_gem_object *obj)
{
	struct rockchip_gem_object *rk_obj;

	drm_gem_free_mmap_offset(obj);

	rk_obj = to_rockchip_obj(obj);

	rockchip_gem_free_buf(rk_obj);

	kfree(rk_obj);
}

/*
 * rockchip_gem_create_with_handle - allocate an object with the given
 * size and create a gem handle on it
 *
 * returns a struct rockchip_gem_object* on success or ERR_PTR values
 * on failure.
 */
static struct rockchip_gem_object *
rockchip_gem_create_with_handle(struct drm_file *file_priv,
				struct drm_device *drm, unsigned int size,
				unsigned int *handle)
{
	struct rockchip_gem_object *rk_obj;
	struct drm_gem_object *obj;
	int ret;

	rk_obj = rockchip_gem_create_object(drm, size, false);
	if (IS_ERR(rk_obj))
		return ERR_CAST(rk_obj);

	obj = &rk_obj->base;

	/*
	 * allocate a id of idr table where the obj is registered
	 * and handle has the id what user can see.
	 */
	ret = drm_gem_handle_create(file_priv, obj, handle);
	if (ret)
		goto err_handle_create;

	/* drop reference from allocate - handle holds it now. */
	drm_gem_object_unreference_unlocked(obj);

	return rk_obj;

err_handle_create:
	rockchip_gem_free_object(obj);

	return ERR_PTR(ret);
}

int rockchip_gem_dumb_map_offset(struct drm_file *file_priv,
				 struct drm_device *dev, uint32_t handle,
				 uint64_t *offset)
{
	struct drm_gem_object *obj;
	int ret;

	obj = drm_gem_object_lookup(file_priv, handle);
	if (!obj) {
		DRM_ERROR("failed to lookup gem object.\n");
		return -EINVAL;
	}

	ret = drm_gem_create_mmap_offset(obj);
	if (ret)
		goto out;

	*offset = drm_vma_node_offset_addr(&obj->vma_node);
	DRM_DEBUG_KMS("offset = 0x%llx\n", *offset);

out:
	drm_gem_object_unreference_unlocked(obj);

	return 0;
}

/*
 * rockchip_gem_dumb_create - (struct drm_driver)->dumb_create callback
 * function
 *
 * This aligns the pitch and size arguments to the minimum required. wrap
 * this into your own function if you need bigger alignment.
 */
int rockchip_gem_dumb_create(struct drm_file *file_priv,
			     struct drm_device *dev,
			     struct drm_mode_create_dumb *args)
{
	struct rockchip_gem_object *rk_obj;
	int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);

	/*
	 * align to 64 bytes since Mali requires it.
	 */
	args->pitch = ALIGN(min_pitch, 64);
	args->size = args->pitch * args->height;

	rk_obj = rockchip_gem_create_with_handle(file_priv, dev, args->size,
						 &args->handle);

	return PTR_ERR_OR_ZERO(rk_obj);
}

/*
 * Allocate a sg_table for this GEM object.
 * Note: Both the table's contents, and the sg_table itself must be freed by
 *       the caller.
 * Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error.
 */
struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj)
{
	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
	struct drm_device *drm = obj->dev;
	struct sg_table *sgt;
	int ret;

	sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
	if (!sgt)
		return ERR_PTR(-ENOMEM);

	ret = dma_get_sgtable_attrs(drm->dev, sgt, rk_obj->kvaddr,
				    rk_obj->dma_addr, obj->size,
				    rk_obj->dma_attrs);
	if (ret) {
		DRM_ERROR("failed to allocate sgt, %d\n", ret);
		kfree(sgt);
		return ERR_PTR(ret);
	}

	return sgt;
}

void *rockchip_gem_prime_vmap(struct drm_gem_object *obj)
{
	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);

	if (rk_obj->dma_attrs & DMA_ATTR_NO_KERNEL_MAPPING)
		return NULL;

	return rk_obj->kvaddr;
}

void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
{
	/* Nothing to do */
}
Commit	Line	Data
2048e328 MY	1	/*
	2	* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
	3	* Author:Mark Yao <mark.yao@rock-chips.com>
	4	*
	5	* This software is licensed under the terms of the GNU General Public
	6	* License version 2, as published by the Free Software Foundation, and
	7	* may be copied, distributed, and modified under those terms.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*/
	14
	15	#include <drm/drm.h>
	16	#include <drm/drmP.h>
	17	#include <drm/drm_gem.h>
	18	#include <drm/drm_vma_manager.h>
	19
2048e328 MY	20	#include "rockchip_drm_drv.h"
	21	#include "rockchip_drm_gem.h"
	22
f76c83b5 DK	23	static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj,
f76c83b5 DK	24	bool alloc_kmap)
2048e328 MY	25	{
	26	struct drm_gem_object *obj = &rk_obj->base;
	27	struct drm_device *drm = obj->dev;
	28
00085f1e	29	rk_obj->dma_attrs = DMA_ATTR_WRITE_COMBINE;
2048e328	30
f76c83b5	31	if (!alloc_kmap)
00085f1e	32	rk_obj->dma_attrs \|= DMA_ATTR_NO_KERNEL_MAPPING;
f76c83b5	33
2048e328 MY	34	rk_obj->kvaddr = dma_alloc_attrs(drm->dev, obj->size,
2048e328 MY	35	&rk_obj->dma_addr, GFP_KERNEL,
00085f1e	36	rk_obj->dma_attrs);
4b9a90c0	37	if (!rk_obj->kvaddr) {
913bb40a	38	DRM_ERROR("failed to allocate %zu byte dma buffer", obj->size);
4b9a90c0	39	return -ENOMEM;
2048e328 MY	40	}
	41
	42	return 0;
	43	}
	44
	45	static void rockchip_gem_free_buf(struct rockchip_gem_object *rk_obj)
	46	{
	47	struct drm_gem_object *obj = &rk_obj->base;
	48	struct drm_device *drm = obj->dev;
	49
	50	dma_free_attrs(drm->dev, obj->size, rk_obj->kvaddr, rk_obj->dma_addr,
00085f1e	51	rk_obj->dma_attrs);
2048e328 MY	52	}
2048e328 MY	53
41315b79 DK	54	static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
	55	struct vm_area_struct *vma)
	56
2048e328	57	{
41315b79	58	int ret;
2048e328 MY	59	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
2048e328 MY	60	struct drm_device *drm = obj->dev;
2048e328	61
41315b79 DK	62	/*
	63	* dma_alloc_attrs() allocated a struct page table for rk_obj, so clear
	64	* VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
	65	*/
	66	vma->vm_flags &= ~VM_PFNMAP;
a8594f20	67	vma->vm_pgoff = 0;
2048e328	68
41315b79	69	ret = dma_mmap_attrs(drm->dev, vma, rk_obj->kvaddr, rk_obj->dma_addr,
00085f1e	70	obj->size, rk_obj->dma_attrs);
41315b79 DK	71	if (ret)
	72	drm_gem_vm_close(vma);
	73
	74	return ret;
	75	}
	76
	77	int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
	78	struct vm_area_struct *vma)
	79	{
41315b79 DK	80	int ret;
41315b79 DK	81
41315b79	82	ret = drm_gem_mmap_obj(obj, obj->size, vma);
41315b79 DK	83	if (ret)
	84	return ret;
	85
	86	return rockchip_drm_gem_object_mmap(obj, vma);
2048e328 MY	87	}
	88
	89	/* drm driver mmap file operations */
	90	int rockchip_gem_mmap(struct file filp, struct vm_area_struct vma)
	91	{
2048e328	92	struct drm_gem_object *obj;
2048e328 MY	93	int ret;
2048e328 MY	94
41315b79 DK	95	ret = drm_gem_mmap(filp, vma);
	96	if (ret)
	97	return ret;
2048e328	98
41315b79	99	obj = vma->vm_private_data;
2048e328	100
41315b79	101	return rockchip_drm_gem_object_mmap(obj, vma);
2048e328 MY	102	}
	103
	104	struct rockchip_gem_object *
f76c83b5 DK	105	rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
f76c83b5 DK	106	bool alloc_kmap)
2048e328 MY	107	{
	108	struct rockchip_gem_object *rk_obj;
	109	struct drm_gem_object *obj;
	110	int ret;
	111
	112	size = round_up(size, PAGE_SIZE);
	113
	114	rk_obj = kzalloc(sizeof(*rk_obj), GFP_KERNEL);
	115	if (!rk_obj)
	116	return ERR_PTR(-ENOMEM);
	117
	118	obj = &rk_obj->base;
	119
	120	drm_gem_private_object_init(drm, obj, size);
	121
f76c83b5	122	ret = rockchip_gem_alloc_buf(rk_obj, alloc_kmap);
2048e328 MY	123	if (ret)
	124	goto err_free_rk_obj;
	125
	126	return rk_obj;
	127
	128	err_free_rk_obj:
	129	kfree(rk_obj);
	130	return ERR_PTR(ret);
	131	}
	132
	133	/*
	134	* rockchip_gem_free_object - (struct drm_driver)->gem_free_object callback
	135	* function
	136	*/
	137	void rockchip_gem_free_object(struct drm_gem_object *obj)
	138	{
	139	struct rockchip_gem_object *rk_obj;
	140
	141	drm_gem_free_mmap_offset(obj);
	142
	143	rk_obj = to_rockchip_obj(obj);
	144
	145	rockchip_gem_free_buf(rk_obj);
	146
	147	kfree(rk_obj);
	148	}
	149
	150	/*
	151	* rockchip_gem_create_with_handle - allocate an object with the given
	152	* size and create a gem handle on it
	153	*
	154	* returns a struct rockchip_gem_object* on success or ERR_PTR values
	155	* on failure.
	156	*/
	157	static struct rockchip_gem_object *
	158	rockchip_gem_create_with_handle(struct drm_file *file_priv,
	159	struct drm_device *drm, unsigned int size,
	160	unsigned int *handle)
	161	{
	162	struct rockchip_gem_object *rk_obj;
	163	struct drm_gem_object *obj;
	164	int ret;
	165
f76c83b5	166	rk_obj = rockchip_gem_create_object(drm, size, false);
2048e328 MY	167	if (IS_ERR(rk_obj))
	168	return ERR_CAST(rk_obj);
	169
	170	obj = &rk_obj->base;
	171
	172	/*
	173	* allocate a id of idr table where the obj is registered
	174	* and handle has the id what user can see.
	175	*/
	176	ret = drm_gem_handle_create(file_priv, obj, handle);
	177	if (ret)
	178	goto err_handle_create;
	179
	180	/* drop reference from allocate - handle holds it now. */
	181	drm_gem_object_unreference_unlocked(obj);
	182
	183	return rk_obj;
	184
	185	err_handle_create:
	186	rockchip_gem_free_object(obj);
	187
	188	return ERR_PTR(ret);
	189	}
	190
	191	int rockchip_gem_dumb_map_offset(struct drm_file *file_priv,
	192	struct drm_device *dev, uint32_t handle,
	193	uint64_t *offset)
	194	{
	195	struct drm_gem_object *obj;
	196	int ret;
	197
a8ad0bd8	198	obj = drm_gem_object_lookup(file_priv, handle);
2048e328 MY	199	if (!obj) {
2048e328 MY	200	DRM_ERROR("failed to lookup gem object.\n");
648a4ce7	201	return -EINVAL;
2048e328 MY	202	}
	203
	204	ret = drm_gem_create_mmap_offset(obj);
	205	if (ret)
	206	goto out;
	207
	208	*offset = drm_vma_node_offset_addr(&obj->vma_node);
	209	DRM_DEBUG_KMS("offset = 0x%llx\n", *offset);
	210
	211	out:
648a4ce7 DV	212	drm_gem_object_unreference_unlocked(obj);
	213
	214	return 0;
2048e328 MY	215	}
	216
	217	/*
	218	* rockchip_gem_dumb_create - (struct drm_driver)->dumb_create callback
	219	* function
	220	*
	221	* This aligns the pitch and size arguments to the minimum required. wrap
	222	* this into your own function if you need bigger alignment.
	223	*/
	224	int rockchip_gem_dumb_create(struct drm_file *file_priv,
	225	struct drm_device *dev,
	226	struct drm_mode_create_dumb *args)
	227	{
	228	struct rockchip_gem_object *rk_obj;
	229	int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
	230
	231	/*
	232	* align to 64 bytes since Mali requires it.
	233	*/
e3c4abdb MY	234	args->pitch = ALIGN(min_pitch, 64);
e3c4abdb MY	235	args->size = args->pitch * args->height;
2048e328 MY	236
	237	rk_obj = rockchip_gem_create_with_handle(file_priv, dev, args->size,
	238	&args->handle);
	239
	240	return PTR_ERR_OR_ZERO(rk_obj);
	241	}
	242
	243	/*
	244	* Allocate a sg_table for this GEM object.
	245	* Note: Both the table's contents, and the sg_table itself must be freed by
	246	* the caller.
	247	* Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error.
	248	*/
	249	struct sg_table rockchip_gem_prime_get_sg_table(struct drm_gem_object obj)
	250	{
	251	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
	252	struct drm_device *drm = obj->dev;
	253	struct sg_table *sgt;
	254	int ret;
	255
	256	sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
	257	if (!sgt)
	258	return ERR_PTR(-ENOMEM);
	259
	260	ret = dma_get_sgtable_attrs(drm->dev, sgt, rk_obj->kvaddr,
	261	rk_obj->dma_addr, obj->size,
00085f1e	262	rk_obj->dma_attrs);
2048e328 MY	263	if (ret) {
	264	DRM_ERROR("failed to allocate sgt, %d\n", ret);
	265	kfree(sgt);
	266	return ERR_PTR(ret);
	267	}
	268
	269	return sgt;
	270	}
	271
	272	void rockchip_gem_prime_vmap(struct drm_gem_object obj)
	273	{
	274	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
	275
00085f1e	276	if (rk_obj->dma_attrs & DMA_ATTR_NO_KERNEL_MAPPING)
f76c83b5 DK	277	return NULL;
f76c83b5 DK	278
2048e328 MY	279	return rk_obj->kvaddr;
	280	}
	281
	282	void rockchip_gem_prime_vunmap(struct drm_gem_object obj, void vaddr)
	283	{
	284	/* Nothing to do */
	285	}