[deliverable/linux.git] / drivers / gpu / drm / ttm / ttm_agp_backend.c

/**************************************************************************
 *
 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
 * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS 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.
 *
 **************************************************************************/
/*
 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
 *          Keith Packard.
 */

#define pr_fmt(fmt) "[TTM] " fmt

#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_page_alloc.h>
#ifdef TTM_HAS_AGP
#include <drm/ttm/ttm_placement.h>
#include <linux/agp_backend.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <asm/agp.h>

struct ttm_agp_backend {
	struct ttm_tt ttm;
	struct agp_memory *mem;
	struct agp_bridge_data *bridge;
};

static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
{
	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
	struct drm_mm_node *node = bo_mem->mm_node;
	struct agp_memory *mem;
	int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
	unsigned i;

	mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
	if (unlikely(mem == NULL))
		return -ENOMEM;

	mem->page_count = 0;
	for (i = 0; i < ttm->num_pages; i++) {
		struct page *page = ttm->pages[i];

		if (!page)
			page = ttm->dummy_read_page;

		mem->pages[mem->page_count++] = page;
	}
	agp_be->mem = mem;

	mem->is_flushed = 1;
	mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;

	ret = agp_bind_memory(mem, node->start);
	if (ret)
		pr_err("AGP Bind memory failed\n");

	return ret;
}

static int ttm_agp_unbind(struct ttm_tt *ttm)
{
	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);

	if (agp_be->mem) {
		if (agp_be->mem->is_bound)
			return agp_unbind_memory(agp_be->mem);
		agp_free_memory(agp_be->mem);
		agp_be->mem = NULL;
	}
	return 0;
}

static void ttm_agp_destroy(struct ttm_tt *ttm)
{
	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);

	if (agp_be->mem)
		ttm_agp_unbind(ttm);
	ttm_tt_fini(ttm);
	kfree(agp_be);
}

static struct ttm_backend_func ttm_agp_func = {
	.bind = ttm_agp_bind,
	.unbind = ttm_agp_unbind,
	.destroy = ttm_agp_destroy,
};

struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
				 struct agp_bridge_data *bridge,
				 unsigned long size, uint32_t page_flags,
				 struct page *dummy_read_page)
{
	struct ttm_agp_backend *agp_be;

	agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL);
	if (!agp_be)
		return NULL;

	agp_be->mem = NULL;
	agp_be->bridge = bridge;
	agp_be->ttm.func = &ttm_agp_func;

	if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
		return NULL;
	}

	return &agp_be->ttm;
}
EXPORT_SYMBOL(ttm_agp_tt_create);

int ttm_agp_tt_populate(struct ttm_tt *ttm)
{
	if (ttm->state != tt_unpopulated)
		return 0;

	return ttm_pool_populate(ttm);
}
EXPORT_SYMBOL(ttm_agp_tt_populate);

void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
{
	ttm_pool_unpopulate(ttm);
}
EXPORT_SYMBOL(ttm_agp_tt_unpopulate);

#endif
Commit	Line	Data
	1	/**************************************************************************
	2	*
	3	* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
	4	* All Rights Reserved.
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the
	8	* "Software"), to deal in the Software without restriction, including
	9	* without limitation the rights to use, copy, modify, merge, publish,
	10	* distribute, sub license, and/or sell copies of the Software, and to
	11	* permit persons to whom the Software is furnished to do so, subject to
	12	* the following conditions:
	13	*
	14	* The above copyright notice and this permission notice (including the
	15	* next paragraph) shall be included in all copies or substantial portions
	16	* of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	21	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
	22	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	24	* USE OR OTHER DEALINGS IN THE SOFTWARE.
	25	*
	26	**************************************************************************/
	27	/*
	28	* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
	29	* Keith Packard.
	30	*/
	31
	32	#define pr_fmt(fmt) "[TTM] " fmt
	33
	34	#include <drm/ttm/ttm_module.h>
	35	#include <drm/ttm/ttm_bo_driver.h>
	36	#include <drm/ttm/ttm_page_alloc.h>
	37	#ifdef TTM_HAS_AGP
	38	#include <drm/ttm/ttm_placement.h>
	39	#include <linux/agp_backend.h>
	40	#include <linux/module.h>
	41	#include <linux/slab.h>
	42	#include <linux/io.h>
	43	#include <asm/agp.h>
	44
	45	struct ttm_agp_backend {
	46	struct ttm_tt ttm;
	47	struct agp_memory *mem;
	48	struct agp_bridge_data *bridge;
	49	};
	50
	51	static int ttm_agp_bind(struct ttm_tt ttm, struct ttm_mem_reg bo_mem)
	52	{
	53	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
	54	struct drm_mm_node *node = bo_mem->mm_node;
	55	struct agp_memory *mem;
	56	int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
	57	unsigned i;
	58
	59	mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
	60	if (unlikely(mem == NULL))
	61	return -ENOMEM;
	62
	63	mem->page_count = 0;
	64	for (i = 0; i < ttm->num_pages; i++) {
	65	struct page *page = ttm->pages[i];
	66
	67	if (!page)
	68	page = ttm->dummy_read_page;
	69
	70	mem->pages[mem->page_count++] = page;
	71	}
	72	agp_be->mem = mem;
	73
	74	mem->is_flushed = 1;
	75	mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
	76
	77	ret = agp_bind_memory(mem, node->start);
	78	if (ret)
	79	pr_err("AGP Bind memory failed\n");
	80
	81	return ret;
	82	}
	83
	84	static int ttm_agp_unbind(struct ttm_tt *ttm)
	85	{
	86	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
	87
	88	if (agp_be->mem) {
	89	if (agp_be->mem->is_bound)
	90	return agp_unbind_memory(agp_be->mem);
	91	agp_free_memory(agp_be->mem);
	92	agp_be->mem = NULL;
	93	}
	94	return 0;
	95	}
	96
	97	static void ttm_agp_destroy(struct ttm_tt *ttm)
	98	{
	99	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
	100
	101	if (agp_be->mem)
	102	ttm_agp_unbind(ttm);
	103	ttm_tt_fini(ttm);
	104	kfree(agp_be);
	105	}
	106
	107	static struct ttm_backend_func ttm_agp_func = {
	108	.bind = ttm_agp_bind,
	109	.unbind = ttm_agp_unbind,
	110	.destroy = ttm_agp_destroy,
	111	};
	112
	113	struct ttm_tt ttm_agp_tt_create(struct ttm_bo_device bdev,
	114	struct agp_bridge_data *bridge,
	115	unsigned long size, uint32_t page_flags,
	116	struct page *dummy_read_page)
	117	{
	118	struct ttm_agp_backend *agp_be;
	119
	120	agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL);
	121	if (!agp_be)
	122	return NULL;
	123
	124	agp_be->mem = NULL;
	125	agp_be->bridge = bridge;
	126	agp_be->ttm.func = &ttm_agp_func;
	127
	128	if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
	129	return NULL;
	130	}
	131
	132	return &agp_be->ttm;
	133	}
	134	EXPORT_SYMBOL(ttm_agp_tt_create);
	135
	136	int ttm_agp_tt_populate(struct ttm_tt *ttm)
	137	{
	138	if (ttm->state != tt_unpopulated)
	139	return 0;
	140
	141	return ttm_pool_populate(ttm);
	142	}
	143	EXPORT_SYMBOL(ttm_agp_tt_populate);
	144
	145	void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
	146	{
	147	ttm_pool_unpopulate(ttm);
	148	}
	149	EXPORT_SYMBOL(ttm_agp_tt_unpopulate);
	150
	151	#endif