WebSVN – Kolibri OS – Diff – /drivers/video/drm/ttm/ttm_tt.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 
 */
 
#define pr_fmt(fmt) "[TTM] " fmt
 
#include 
 
#include 
//#include 
//#include 
#include 
//#include 
//#include 
#include 
#include 
//#include 
#include 
#include 
#include 
#include 
#include 
 
/**
 * Allocates storage for pointers to the pages that back the ttm.
 */
static void ttm_tt_alloc_page_directory(struct ttm_tt *ttm)
{
	ttm->pages = drm_calloc_large(ttm->num_pages, sizeof(void*));
}
 
static void ttm_dma_tt_alloc_page_directory(struct ttm_dma_tt *ttm)
{
	ttm->ttm.pages = drm_calloc_large(ttm->ttm.num_pages,
					  sizeof(*ttm->ttm.pages) +
					  sizeof(*ttm->dma_address) +
					  sizeof(*ttm->cpu_address));
	ttm->cpu_address = (void *) (ttm->ttm.pages + ttm->ttm.num_pages);
	ttm->dma_address = (void *) (ttm->cpu_address + ttm->ttm.num_pages);
}
 
#ifdef CONFIG_X86
static inline int ttm_tt_set_page_caching(struct page *p,
					  enum ttm_caching_state c_old,
					  enum ttm_caching_state c_new)
{
	int ret = 0;
 
	if (PageHighMem(p))
		return 0;
 
	if (c_old != tt_cached) {
		/* p isn't in the default caching state, set it to
		 * writeback first to free its current memtype. */
 
		ret = set_pages_wb(p, 1);
		if (ret)
			return ret;
	}
 
	if (c_new == tt_wc)
		ret = set_memory_wc((unsigned long) page_address(p), 1);
	else if (c_new == tt_uncached)
		ret = set_pages_uc(p, 1);
 
	return ret;
}
#else /* CONFIG_X86 */
static inline int ttm_tt_set_page_caching(struct page *p,
					  enum ttm_caching_state c_old,
					  enum ttm_caching_state c_new)
{
	return 0;
}
#endif /* CONFIG_X86 */
 
/*
 * Change caching policy for the linear kernel map
 * for range of pages in a ttm.
 */
 
static int ttm_tt_set_caching(struct ttm_tt *ttm,
			      enum ttm_caching_state c_state)
{
	int i, j;
	struct page *cur_page;
	int ret;
 
	if (ttm->caching_state == c_state)
		return 0;
 
	if (ttm->state == tt_unpopulated) {
		/* Change caching but don't populate */
		ttm->caching_state = c_state;
		return 0;
	}
 
	if (ttm->caching_state == tt_cached)
		drm_clflush_pages(ttm->pages, ttm->num_pages);
 
	for (i = 0; i < ttm->num_pages; ++i) {
		cur_page = ttm->pages[i];
		if (likely(cur_page != NULL)) {
			ret = ttm_tt_set_page_caching(cur_page,
						      ttm->caching_state,
						      c_state);
			if (unlikely(ret != 0))
				goto out_err;
		}
	}
 
	ttm->caching_state = c_state;
 
	return 0;
 
out_err:
	for (j = 0; j < i; ++j) {
		cur_page = ttm->pages[j];
		if (likely(cur_page != NULL)) {
			(void)ttm_tt_set_page_caching(cur_page, c_state,
						      ttm->caching_state);
		}
	}
 
	return ret;
}
 
int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement)
{
	enum ttm_caching_state state;
 
	if (placement & TTM_PL_FLAG_WC)
		state = tt_wc;
	else if (placement & TTM_PL_FLAG_UNCACHED)
		state = tt_uncached;
	else
		state = tt_cached;
 
	return ttm_tt_set_caching(ttm, state);
}
EXPORT_SYMBOL(ttm_tt_set_placement_caching);
 
void ttm_tt_destroy(struct ttm_tt *ttm)
{
	if (unlikely(ttm == NULL))
		return;
 
	if (ttm->state == tt_bound) {
		ttm_tt_unbind(ttm);
	}
 
	if (ttm->state == tt_unbound)
		ttm_tt_unpopulate(ttm);
 
//   if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
//       ttm->swap_storage)
//       fput(ttm->swap_storage);
 
	ttm->swap_storage = NULL;
	ttm->func->destroy(ttm);
}
 
int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
		unsigned long size, uint32_t page_flags,
		struct page *dummy_read_page)
{
	ttm->bdev = bdev;
	ttm->glob = bdev->glob;
	ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
	ttm->caching_state = tt_cached;
	ttm->page_flags = page_flags;
	ttm->dummy_read_page = dummy_read_page;
	ttm->state = tt_unpopulated;
	ttm->swap_storage = NULL;
 
	ttm_tt_alloc_page_directory(ttm);
	if (!ttm->pages) {
		ttm_tt_destroy(ttm);
        printf("Failed allocating page table\n");
		return -ENOMEM;
	}
	return 0;
}
EXPORT_SYMBOL(ttm_tt_init);
 
void ttm_tt_fini(struct ttm_tt *ttm)
{
	drm_free_large(ttm->pages);
	ttm->pages = NULL;
}
EXPORT_SYMBOL(ttm_tt_fini);
 
int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev,
		unsigned long size, uint32_t page_flags,
		struct page *dummy_read_page)
{
	struct ttm_tt *ttm = &ttm_dma->ttm;
 
	ttm->bdev = bdev;
	ttm->glob = bdev->glob;
	ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
	ttm->caching_state = tt_cached;
	ttm->page_flags = page_flags;
	ttm->dummy_read_page = dummy_read_page;
	ttm->state = tt_unpopulated;
	ttm->swap_storage = NULL;
 
	INIT_LIST_HEAD(&ttm_dma->pages_list);
	ttm_dma_tt_alloc_page_directory(ttm_dma);
	if (!ttm->pages) {
		ttm_tt_destroy(ttm);
        printf("Failed allocating page table\n");
		return -ENOMEM;
	}
	return 0;
}
EXPORT_SYMBOL(ttm_dma_tt_init);
 
void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma)
{
	struct ttm_tt *ttm = &ttm_dma->ttm;
 
	drm_free_large(ttm->pages);
	ttm->pages = NULL;
	ttm_dma->cpu_address = NULL;
	ttm_dma->dma_address = NULL;
}
EXPORT_SYMBOL(ttm_dma_tt_fini);
 
void ttm_tt_unbind(struct ttm_tt *ttm)
{
	int ret;
 
	if (ttm->state == tt_bound) {
		ret = ttm->func->unbind(ttm);
		BUG_ON(ret);
		ttm->state = tt_unbound;
	}
}
 
 
 
int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
{
	int ret = 0;
 
	if (!ttm)
		return -EINVAL;
 
	if (ttm->state == tt_bound)
		return 0;
 
	ret = ttm->bdev->driver->ttm_tt_populate(ttm);
	if (ret)
		return ret;
 
	ret = ttm->func->bind(ttm, bo_mem);
	if (unlikely(ret != 0))
		return ret;
 
	ttm->state = tt_bound;
 
	return 0;
}
EXPORT_SYMBOL(ttm_tt_bind);
 
 
#if 0
int ttm_tt_swapin(struct ttm_tt *ttm)
{
	struct address_space *swap_space;
	struct file *swap_storage;
	struct page *from_page;
	struct page *to_page;
	int i;
	int ret = -ENOMEM;
 
	swap_storage = ttm->swap_storage;
	BUG_ON(swap_storage == NULL);
 
	swap_space = file_inode(swap_storage)->i_mapping;
 
	for (i = 0; i < ttm->num_pages; ++i) {
		from_page = shmem_read_mapping_page(swap_space, i);
		if (IS_ERR(from_page)) {
			ret = PTR_ERR(from_page);
			goto out_err;
		}
		to_page = ttm->pages[i];
		if (unlikely(to_page == NULL))
			goto out_err;
 
		copy_highpage(to_page, from_page);
		page_cache_release(from_page);
	}
 
	if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP))
		fput(swap_storage);
	ttm->swap_storage = NULL;
	ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
 
	return 0;
out_err:
	return ret;
}
 
int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
{
	struct address_space *swap_space;
	struct file *swap_storage;
	struct page *from_page;
	struct page *to_page;
	int i;
	int ret = -ENOMEM;
 
	BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
	BUG_ON(ttm->caching_state != tt_cached);
 
	if (!persistent_swap_storage) {
		swap_storage = shmem_file_setup("ttm swap",
						ttm->num_pages << PAGE_SHIFT,
						0);
		if (unlikely(IS_ERR(swap_storage))) {
			pr_err("Failed allocating swap storage\n");
			return PTR_ERR(swap_storage);
		}
	} else
		swap_storage = persistent_swap_storage;
 
	swap_space = file_inode(swap_storage)->i_mapping;
 
	for (i = 0; i < ttm->num_pages; ++i) {
		from_page = ttm->pages[i];
		if (unlikely(from_page == NULL))
			continue;
		to_page = shmem_read_mapping_page(swap_space, i);
		if (unlikely(IS_ERR(to_page))) {
			ret = PTR_ERR(to_page);
			goto out_err;
		}
		copy_highpage(to_page, from_page);
		set_page_dirty(to_page);
		mark_page_accessed(to_page);
		page_cache_release(to_page);
	}
 
	ttm_tt_unpopulate(ttm);
	ttm->swap_storage = swap_storage;
	ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
	if (persistent_swap_storage)
		ttm->page_flags |= TTM_PAGE_FLAG_PERSISTENT_SWAP;
 
	return 0;
out_err:
	if (!persistent_swap_storage)
		fput(swap_storage);
 
	return ret;
}
#endif
 
static void ttm_tt_clear_mapping(struct ttm_tt *ttm)
{
	pgoff_t i;
	struct page **page = ttm->pages;
 
}
 
void ttm_tt_unpopulate(struct ttm_tt *ttm)
{
	if (ttm->state == tt_unpopulated)
		return;
 
	ttm_tt_clear_mapping(ttm);
	ttm->bdev->driver->ttm_tt_unpopulate(ttm);
}

Rev 4569	Rev 5078
1	/**************************************************************************	1	/**************************************************************************
2	*	2	*
3	* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA	3	* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
4	* All Rights Reserved.	4	* All Rights Reserved.
5	*	5	*
6	* Permission is hereby granted, free of charge, to any person obtaining a	6	* Permission is hereby granted, free of charge, to any person obtaining a
7	* copy of this software and associated documentation files (the	7	* copy of this software and associated documentation files (the
8	* "Software"), to deal in the Software without restriction, including	8	* "Software"), to deal in the Software without restriction, including
9	* without limitation the rights to use, copy, modify, merge, publish,	9	* without limitation the rights to use, copy, modify, merge, publish,
10	* distribute, sub license, and/or sell copies of the Software, and to	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	11	* permit persons to whom the Software is furnished to do so, subject to
12	* the following conditions:	12	* the following conditions:
13	*	13	*
14	* The above copyright notice and this permission notice (including the	14	* The above copyright notice and this permission notice (including the
15	* next paragraph) shall be included in all copies or substantial portions	15	* next paragraph) shall be included in all copies or substantial portions
16	* of the Software.	16	* of the Software.
17	*	17	*
18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR	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,	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL	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,	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	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	23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24	* USE OR OTHER DEALINGS IN THE SOFTWARE.	24	* USE OR OTHER DEALINGS IN THE SOFTWARE.
25	*	25	*
26	**************************************************************************/	26	**************************************************************************/
27	/*	27	/*
28	* Authors: Thomas Hellstrom	28	* Authors: Thomas Hellstrom
29	*/	29	*/
30		30
31	#define pr_fmt(fmt) "[TTM] " fmt	31	#define pr_fmt(fmt) "[TTM] " fmt
32		32
33	#include	33	#include
34		34
35	#include	35	#include
36	//#include	36	//#include
37	//#include	37	//#include
38	#include	38	#include
39	//#include	39	//#include
40	//#include	40	//#include
41	#include	41	#include
42	#include	42	#include
43	//#include	43	//#include
44	#include	44	#include
45	#include	45	#include
46	#include	46	#include
47	#include	47	#include
48	#include	48	#include
49		49
50	/**	50	/**
51	* Allocates storage for pointers to the pages that back the ttm.	51	* Allocates storage for pointers to the pages that back the ttm.
52	*/	52	*/
53	static void ttm_tt_alloc_page_directory(struct ttm_tt *ttm)	53	static void ttm_tt_alloc_page_directory(struct ttm_tt *ttm)
54	{	54	{
55	ttm->pages = drm_calloc_large(ttm->num_pages, sizeof(void*));	55	ttm->pages = drm_calloc_large(ttm->num_pages, sizeof(void*));
56	}	56	}
57		57
58	static void ttm_dma_tt_alloc_page_directory(struct ttm_dma_tt *ttm)	58	static void ttm_dma_tt_alloc_page_directory(struct ttm_dma_tt *ttm)
59	{	59	{
60	ttm->ttm.pages = drm_calloc_large(ttm->ttm.num_pages, sizeof(void*));	60	ttm->ttm.pages = drm_calloc_large(ttm->ttm.num_pages,
61	ttm->dma_address = drm_calloc_large(ttm->ttm.num_pages,	61	sizeof(*ttm->ttm.pages) +
62	sizeof(*ttm->dma_address));	62	sizeof(*ttm->dma_address) +
-		63	sizeof(*ttm->cpu_address));
-		64	ttm->cpu_address = (void *) (ttm->ttm.pages + ttm->ttm.num_pages);
-		65	ttm->dma_address = (void *) (ttm->cpu_address + ttm->ttm.num_pages);
63	}	66	}
64		67
65	#ifdef CONFIG_X86	68	#ifdef CONFIG_X86
66	static inline int ttm_tt_set_page_caching(struct page *p,	69	static inline int ttm_tt_set_page_caching(struct page *p,
67	enum ttm_caching_state c_old,	70	enum ttm_caching_state c_old,
68	enum ttm_caching_state c_new)	71	enum ttm_caching_state c_new)
69	{	72	{
70	int ret = 0;	73	int ret = 0;
71		74
72	if (PageHighMem(p))	75	if (PageHighMem(p))
73	return 0;	76	return 0;
74		77
75	if (c_old != tt_cached) {	78	if (c_old != tt_cached) {
76	/* p isn't in the default caching state, set it to	79	/* p isn't in the default caching state, set it to
77	* writeback first to free its current memtype. */	80	* writeback first to free its current memtype. */
78		81
79	ret = set_pages_wb(p, 1);	82	ret = set_pages_wb(p, 1);
80	if (ret)	83	if (ret)
81	return ret;	84	return ret;
82	}	85	}
83		86
84	if (c_new == tt_wc)	87	if (c_new == tt_wc)
85	ret = set_memory_wc((unsigned long) page_address(p), 1);	88	ret = set_memory_wc((unsigned long) page_address(p), 1);
86	else if (c_new == tt_uncached)	89	else if (c_new == tt_uncached)
87	ret = set_pages_uc(p, 1);	90	ret = set_pages_uc(p, 1);
88		91
89	return ret;	92	return ret;
90	}	93	}
91	#else /* CONFIG_X86 */	94	#else /* CONFIG_X86 */
92	static inline int ttm_tt_set_page_caching(struct page *p,	95	static inline int ttm_tt_set_page_caching(struct page *p,
93	enum ttm_caching_state c_old,	96	enum ttm_caching_state c_old,
94	enum ttm_caching_state c_new)	97	enum ttm_caching_state c_new)
95	{	98	{
96	return 0;	99	return 0;
97	}	100	}
98	#endif /* CONFIG_X86 */	101	#endif /* CONFIG_X86 */
99		102
100	/*	103	/*
101	* Change caching policy for the linear kernel map	104	* Change caching policy for the linear kernel map
102	* for range of pages in a ttm.	105	* for range of pages in a ttm.
103	*/	106	*/
104		107
105	static int ttm_tt_set_caching(struct ttm_tt *ttm,	108	static int ttm_tt_set_caching(struct ttm_tt *ttm,
106	enum ttm_caching_state c_state)	109	enum ttm_caching_state c_state)
107	{	110	{
108	int i, j;	111	int i, j;
109	struct page *cur_page;	112	struct page *cur_page;
110	int ret;	113	int ret;
111		114
112	if (ttm->caching_state == c_state)	115	if (ttm->caching_state == c_state)
113	return 0;	116	return 0;
114		117
115	if (ttm->state == tt_unpopulated) {	118	if (ttm->state == tt_unpopulated) {
116	/* Change caching but don't populate */	119	/* Change caching but don't populate */
117	ttm->caching_state = c_state;	120	ttm->caching_state = c_state;
118	return 0;	121	return 0;
119	}	122	}
120		123
121	// if (ttm->caching_state == tt_cached)	124	if (ttm->caching_state == tt_cached)
122	// drm_clflush_pages(ttm->pages, ttm->num_pages);	125	drm_clflush_pages(ttm->pages, ttm->num_pages);
123		126
124	for (i = 0; i < ttm->num_pages; ++i) {	127	for (i = 0; i < ttm->num_pages; ++i) {
125	cur_page = ttm->pages[i];	128	cur_page = ttm->pages[i];
126	if (likely(cur_page != NULL)) {	129	if (likely(cur_page != NULL)) {
127	ret = ttm_tt_set_page_caching(cur_page,	130	ret = ttm_tt_set_page_caching(cur_page,
128	ttm->caching_state,	131	ttm->caching_state,
129	c_state);	132	c_state);
130	if (unlikely(ret != 0))	133	if (unlikely(ret != 0))
131	goto out_err;	134	goto out_err;
132	}	135	}
133	}	136	}
134		137
135	ttm->caching_state = c_state;	138	ttm->caching_state = c_state;
136		139
137	return 0;	140	return 0;
138		141
139	out_err:	142	out_err:
140	for (j = 0; j < i; ++j) {	143	for (j = 0; j < i; ++j) {
141	cur_page = ttm->pages[j];	144	cur_page = ttm->pages[j];
142	if (likely(cur_page != NULL)) {	145	if (likely(cur_page != NULL)) {
143	(void)ttm_tt_set_page_caching(cur_page, c_state,	146	(void)ttm_tt_set_page_caching(cur_page, c_state,
144	ttm->caching_state);	147	ttm->caching_state);
145	}	148	}
146	}	149	}
147		150
148	return ret;	151	return ret;
149	}	152	}
150		153
151	int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement)	154	int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement)
152	{	155	{
153	enum ttm_caching_state state;	156	enum ttm_caching_state state;
154		157
155	if (placement & TTM_PL_FLAG_WC)	158	if (placement & TTM_PL_FLAG_WC)
156	state = tt_wc;	159	state = tt_wc;
157	else if (placement & TTM_PL_FLAG_UNCACHED)	160	else if (placement & TTM_PL_FLAG_UNCACHED)
158	state = tt_uncached;	161	state = tt_uncached;
159	else	162	else
160	state = tt_cached;	163	state = tt_cached;
161		164
162	return ttm_tt_set_caching(ttm, state);	165	return ttm_tt_set_caching(ttm, state);
163	}	166	}
164	EXPORT_SYMBOL(ttm_tt_set_placement_caching);	167	EXPORT_SYMBOL(ttm_tt_set_placement_caching);
165		168
166	void ttm_tt_destroy(struct ttm_tt *ttm)	169	void ttm_tt_destroy(struct ttm_tt *ttm)
167	{	170	{
168	if (unlikely(ttm == NULL))	171	if (unlikely(ttm == NULL))
169	return;	172	return;
170		173
171	if (ttm->state == tt_bound) {	174	if (ttm->state == tt_bound) {
172	ttm_tt_unbind(ttm);	175	ttm_tt_unbind(ttm);
173	}	176	}
174		177
175	// if (ttm->state == tt_unbound)	178	if (ttm->state == tt_unbound)
176	// ttm_tt_unpopulate(ttm);	179	ttm_tt_unpopulate(ttm);
177		180
178	// if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&	181	// if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
179	// ttm->swap_storage)	182	// ttm->swap_storage)
180	// fput(ttm->swap_storage);	183	// fput(ttm->swap_storage);
181		184
182	ttm->swap_storage = NULL;	185	ttm->swap_storage = NULL;
183	ttm->func->destroy(ttm);	186	ttm->func->destroy(ttm);
184	}	187	}
185		188
186	int ttm_tt_init(struct ttm_tt ttm, struct ttm_bo_device bdev,	189	int ttm_tt_init(struct ttm_tt ttm, struct ttm_bo_device bdev,
187	unsigned long size, uint32_t page_flags,	190	unsigned long size, uint32_t page_flags,
188	struct page *dummy_read_page)	191	struct page *dummy_read_page)
189	{	192	{
190	ttm->bdev = bdev;	193	ttm->bdev = bdev;
191	ttm->glob = bdev->glob;	194	ttm->glob = bdev->glob;
192	ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;	195	ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
193	ttm->caching_state = tt_cached;	196	ttm->caching_state = tt_cached;
194	ttm->page_flags = page_flags;	197	ttm->page_flags = page_flags;
195	ttm->dummy_read_page = dummy_read_page;	198	ttm->dummy_read_page = dummy_read_page;
196	ttm->state = tt_unpopulated;	199	ttm->state = tt_unpopulated;
197	ttm->swap_storage = NULL;	200	ttm->swap_storage = NULL;
198		201
199	ttm_tt_alloc_page_directory(ttm);	202	ttm_tt_alloc_page_directory(ttm);
200	if (!ttm->pages) {	203	if (!ttm->pages) {
201	ttm_tt_destroy(ttm);	204	ttm_tt_destroy(ttm);
202	printf("Failed allocating page table\n");	205	printf("Failed allocating page table\n");
203	return -ENOMEM;	206	return -ENOMEM;
204	}	207	}
205	return 0;	208	return 0;
206	}	209	}
207	EXPORT_SYMBOL(ttm_tt_init);	210	EXPORT_SYMBOL(ttm_tt_init);
208		211
209	void ttm_tt_fini(struct ttm_tt *ttm)	212	void ttm_tt_fini(struct ttm_tt *ttm)
210	{	213	{
211	drm_free_large(ttm->pages);	214	drm_free_large(ttm->pages);
212	ttm->pages = NULL;	215	ttm->pages = NULL;
213	}	216	}
214	EXPORT_SYMBOL(ttm_tt_fini);	217	EXPORT_SYMBOL(ttm_tt_fini);
215		218
216	int ttm_dma_tt_init(struct ttm_dma_tt ttm_dma, struct ttm_bo_device bdev,	219	int ttm_dma_tt_init(struct ttm_dma_tt ttm_dma, struct ttm_bo_device bdev,
217	unsigned long size, uint32_t page_flags,	220	unsigned long size, uint32_t page_flags,
218	struct page *dummy_read_page)	221	struct page *dummy_read_page)
219	{	222	{
220	struct ttm_tt *ttm = &ttm_dma->ttm;	223	struct ttm_tt *ttm = &ttm_dma->ttm;
221		224
222	ttm->bdev = bdev;	225	ttm->bdev = bdev;
223	ttm->glob = bdev->glob;	226	ttm->glob = bdev->glob;
224	ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;	227	ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
225	ttm->caching_state = tt_cached;	228	ttm->caching_state = tt_cached;
226	ttm->page_flags = page_flags;	229	ttm->page_flags = page_flags;
227	ttm->dummy_read_page = dummy_read_page;	230	ttm->dummy_read_page = dummy_read_page;
228	ttm->state = tt_unpopulated;	231	ttm->state = tt_unpopulated;
229	ttm->swap_storage = NULL;	232	ttm->swap_storage = NULL;
230		233
231	INIT_LIST_HEAD(&ttm_dma->pages_list);	234	INIT_LIST_HEAD(&ttm_dma->pages_list);
232	ttm_dma_tt_alloc_page_directory(ttm_dma);	235	ttm_dma_tt_alloc_page_directory(ttm_dma);
233	if (!ttm->pages \|\| !ttm_dma->dma_address) {	236	if (!ttm->pages) {
234	ttm_tt_destroy(ttm);	237	ttm_tt_destroy(ttm);
235	printf("Failed allocating page table\n");	238	printf("Failed allocating page table\n");
236	return -ENOMEM;	239	return -ENOMEM;
237	}	240	}
238	return 0;	241	return 0;
239	}	242	}
240	EXPORT_SYMBOL(ttm_dma_tt_init);	243	EXPORT_SYMBOL(ttm_dma_tt_init);
241		244
242	void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma)	245	void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma)
243	{	246	{
244	struct ttm_tt *ttm = &ttm_dma->ttm;	247	struct ttm_tt *ttm = &ttm_dma->ttm;
245		248
246	drm_free_large(ttm->pages);	249	drm_free_large(ttm->pages);
247	ttm->pages = NULL;	250	ttm->pages = NULL;
248	drm_free_large(ttm_dma->dma_address);	251	ttm_dma->cpu_address = NULL;
249	ttm_dma->dma_address = NULL;	252	ttm_dma->dma_address = NULL;
250	}	253	}
251	EXPORT_SYMBOL(ttm_dma_tt_fini);	254	EXPORT_SYMBOL(ttm_dma_tt_fini);
252		255
253	void ttm_tt_unbind(struct ttm_tt *ttm)	256	void ttm_tt_unbind(struct ttm_tt *ttm)
254	{	257	{
255	int ret;	258	int ret;
256		259
257	if (ttm->state == tt_bound) {	260	if (ttm->state == tt_bound) {
258	ret = ttm->func->unbind(ttm);	261	ret = ttm->func->unbind(ttm);
259	BUG_ON(ret);	262	BUG_ON(ret);
260	ttm->state = tt_unbound;	263	ttm->state = tt_unbound;
261	}	264	}
262	}	265	}
263		-
264	#if 0	-
265		266
266	int ttm_tt_bind(struct ttm_tt ttm, struct ttm_mem_reg bo_mem)	267	int ttm_tt_bind(struct ttm_tt ttm, struct ttm_mem_reg bo_mem)
267	{	268	{
268	int ret = 0;	269	int ret = 0;
269		270
270	if (!ttm)	271	if (!ttm)
271	return -EINVAL;	272	return -EINVAL;
272		273
273	if (ttm->state == tt_bound)	274	if (ttm->state == tt_bound)
274	return 0;	275	return 0;
275		276
276	ret = ttm->bdev->driver->ttm_tt_populate(ttm);	277	ret = ttm->bdev->driver->ttm_tt_populate(ttm);
277	if (ret)	278	if (ret)
278	return ret;	279	return ret;
279		280
280	ret = ttm->func->bind(ttm, bo_mem);	281	ret = ttm->func->bind(ttm, bo_mem);
281	if (unlikely(ret != 0))	282	if (unlikely(ret != 0))
282	return ret;	283	return ret;
283		284
284	ttm->state = tt_bound;	285	ttm->state = tt_bound;
285		286
286	return 0;	287	return 0;
287	}	288	}
288	EXPORT_SYMBOL(ttm_tt_bind);	289	EXPORT_SYMBOL(ttm_tt_bind);
289	#endif	-
290		290
291	/*	291	#if 0
292	int ttm_tt_swapin(struct ttm_tt *ttm)	292	int ttm_tt_swapin(struct ttm_tt *ttm)
293	{	293	{
294	struct address_space *swap_space;	294	struct address_space *swap_space;
295	struct file *swap_storage;	295	struct file *swap_storage;
296	struct page *from_page;	296	struct page *from_page;
297	struct page *to_page;	297	struct page *to_page;
298	int i;	298	int i;
299	int ret = -ENOMEM;	299	int ret = -ENOMEM;
300		300
301	swap_storage = ttm->swap_storage;	301	swap_storage = ttm->swap_storage;
302	BUG_ON(swap_storage == NULL);	302	BUG_ON(swap_storage == NULL);
303		303
304	swap_space = file_inode(swap_storage)->i_mapping;	304	swap_space = file_inode(swap_storage)->i_mapping;
305		305
306	for (i = 0; i < ttm->num_pages; ++i) {	306	for (i = 0; i < ttm->num_pages; ++i) {
307	from_page = shmem_read_mapping_page(swap_space, i);	307	from_page = shmem_read_mapping_page(swap_space, i);
308	if (IS_ERR(from_page)) {	308	if (IS_ERR(from_page)) {
309	ret = PTR_ERR(from_page);	309	ret = PTR_ERR(from_page);
310	goto out_err;	310	goto out_err;
311	}	311	}
312	to_page = ttm->pages[i];	312	to_page = ttm->pages[i];
313	if (unlikely(to_page == NULL))	313	if (unlikely(to_page == NULL))
314	goto out_err;	314	goto out_err;
315		315
316	copy_highpage(to_page, from_page);	316	copy_highpage(to_page, from_page);
317	page_cache_release(from_page);	317	page_cache_release(from_page);
318	}	318	}
319		319
320	if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP))	320	if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP))
321	fput(swap_storage);	321	fput(swap_storage);
322	ttm->swap_storage = NULL;	322	ttm->swap_storage = NULL;
323	ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;	323	ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
324		324
325	return 0;	325	return 0;
326	out_err:	326	out_err:
327	return ret;	327	return ret;
328	}	328	}
329		329
330	int ttm_tt_swapout(struct ttm_tt ttm, struct file persistent_swap_storage)	330	int ttm_tt_swapout(struct ttm_tt ttm, struct file persistent_swap_storage)
331	{	331	{
332	struct address_space *swap_space;	332	struct address_space *swap_space;
333	struct file *swap_storage;	333	struct file *swap_storage;
334	struct page *from_page;	334	struct page *from_page;
335	struct page *to_page;	335	struct page *to_page;
336	int i;	336	int i;
337	int ret = -ENOMEM;	337	int ret = -ENOMEM;
338		338
339	BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);	339	BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
340	BUG_ON(ttm->caching_state != tt_cached);	340	BUG_ON(ttm->caching_state != tt_cached);
341		341
342	if (!persistent_swap_storage) {	342	if (!persistent_swap_storage) {
343	swap_storage = shmem_file_setup("ttm swap",	343	swap_storage = shmem_file_setup("ttm swap",
344	ttm->num_pages << PAGE_SHIFT,	344	ttm->num_pages << PAGE_SHIFT,
345	0);	345	0);
346	if (unlikely(IS_ERR(swap_storage))) {	346	if (unlikely(IS_ERR(swap_storage))) {
347	pr_err("Failed allocating swap storage\n");	347	pr_err("Failed allocating swap storage\n");
348	return PTR_ERR(swap_storage);	348	return PTR_ERR(swap_storage);
349	}	349	}
350	} else	350	} else
351	swap_storage = persistent_swap_storage;	351	swap_storage = persistent_swap_storage;
352		352
353	swap_space = file_inode(swap_storage)->i_mapping;	353	swap_space = file_inode(swap_storage)->i_mapping;
354		354
355	for (i = 0; i < ttm->num_pages; ++i) {	355	for (i = 0; i < ttm->num_pages; ++i) {
356	from_page = ttm->pages[i];	356	from_page = ttm->pages[i];
357	if (unlikely(from_page == NULL))	357	if (unlikely(from_page == NULL))
358	continue;	358	continue;
359	to_page = shmem_read_mapping_page(swap_space, i);	359	to_page = shmem_read_mapping_page(swap_space, i);
360	if (unlikely(IS_ERR(to_page))) {	360	if (unlikely(IS_ERR(to_page))) {
361	ret = PTR_ERR(to_page);	361	ret = PTR_ERR(to_page);
362	goto out_err;	362	goto out_err;
363	}	363	}
364	copy_highpage(to_page, from_page);	364	copy_highpage(to_page, from_page);
365	set_page_dirty(to_page);	365	set_page_dirty(to_page);
366	mark_page_accessed(to_page);	366	mark_page_accessed(to_page);
367	page_cache_release(to_page);	367	page_cache_release(to_page);
368	}	368	}
369		369
370	ttm_tt_unpopulate(ttm);	370	ttm_tt_unpopulate(ttm);
371	ttm->swap_storage = swap_storage;	371	ttm->swap_storage = swap_storage;
372	ttm->page_flags \|= TTM_PAGE_FLAG_SWAPPED;	372	ttm->page_flags \|= TTM_PAGE_FLAG_SWAPPED;
373	if (persistent_swap_storage)	373	if (persistent_swap_storage)
374	ttm->page_flags \|= TTM_PAGE_FLAG_PERSISTENT_SWAP;	374	ttm->page_flags \|= TTM_PAGE_FLAG_PERSISTENT_SWAP;
375		375
376	return 0;	376	return 0;
377	out_err:	377	out_err:
378	if (!persistent_swap_storage)	378	if (!persistent_swap_storage)
379	fput(swap_storage);	379	fput(swap_storage);
380		380
381	return ret;	381	return ret;
382	}	382	}
-		383	#endif
-		384
383		385	static void ttm_tt_clear_mapping(struct ttm_tt *ttm)
-		386	{
-		387	pgoff_t i;
-		388	struct page **page = ttm->pages;
-		389
-		390	}
-		391
-		392	void ttm_tt_unpopulate(struct ttm_tt *ttm)
-		393	{
-		394	if (ttm->state == tt_unpopulated)
-		395	return;
-		396
384	*/	397	ttm_tt_clear_mapping(ttm);
-		398	ttm->bdev->driver->ttm_tt_unpopulate(ttm);
-		399	}

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/ttm/ttm_tt.c – Rev 4569 → 5078