1 /****************************************************************************
2 * Copyright (C) 2003-2006 by XGI Technology, Taiwan.
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation on the rights to use, copy, modify, merge,
10 * publish, distribute, sublicense, and/or sell copies of the Software,
11 * and to permit persons to whom the Software is furnished to do so,
12 * subject to the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial
16 * portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * XGI AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 * DEALINGS IN THE SOFTWARE.
25 ***************************************************************************/
29 #define XGI_FB_HEAP_START 0x1000000
31 struct kmem_cache *xgi_mem_block_cache = NULL;
33 static struct xgi_mem_block *xgi_mem_new_node(void);
36 int xgi_mem_heap_init(struct xgi_mem_heap *heap, unsigned int start,
39 struct xgi_mem_block *block;
41 INIT_LIST_HEAD(&heap->free_list);
42 INIT_LIST_HEAD(&heap->used_list);
43 INIT_LIST_HEAD(&heap->sort_list);
44 heap->initialized = TRUE;
46 block = kmem_cache_alloc(xgi_mem_block_cache, GFP_KERNEL);
51 block->offset = start;
52 block->size = end - start;
54 list_add(&block->list, &heap->free_list);
56 heap->max_freesize = end - start;
62 void xgi_mem_heap_cleanup(struct xgi_mem_heap * heap)
64 struct list_head *free_list;
65 struct xgi_mem_block *block;
66 struct xgi_mem_block *next;
69 free_list = &heap->free_list;
70 for (i = 0; i < 3; i++, free_list++) {
71 list_for_each_entry_safe(block, next, free_list, list) {
73 ("No. %d block->offset: 0x%lx block->size: 0x%lx \n",
74 i, block->offset, block->size);
75 kmem_cache_free(xgi_mem_block_cache, block);
80 heap->initialized = 0;
84 struct xgi_mem_block *xgi_mem_new_node(void)
86 struct xgi_mem_block *block =
87 kmem_cache_alloc(xgi_mem_block_cache, GFP_KERNEL);
90 DRM_ERROR("kmem_cache_alloc failed\n");
96 block->filp = (struct drm_file *) -1;
102 struct xgi_mem_block *xgi_mem_alloc(struct xgi_mem_heap * heap,
103 unsigned long originalSize)
105 struct xgi_mem_block *block, *free_block, *used_block;
106 unsigned long size = (originalSize + PAGE_SIZE - 1) & PAGE_MASK;
109 DRM_INFO("Original 0x%lx bytes requested, really 0x%lx allocated\n",
113 DRM_ERROR("size == 0\n");
116 DRM_INFO("max_freesize: 0x%lx \n", heap->max_freesize);
117 if (size > heap->max_freesize) {
119 ("size: 0x%lx is bigger than frame buffer total free size: 0x%lx !\n",
120 size, heap->max_freesize);
124 list_for_each_entry(block, &heap->free_list, list) {
125 DRM_INFO("block: 0x%px \n", block);
126 if (size <= block->size) {
131 if (&block->list == &heap->free_list) {
133 ("Can't allocate %ldk size from frame buffer memory !\n",
139 DRM_INFO("alloc size: 0x%lx from offset: 0x%lx size: 0x%lx \n",
140 size, free_block->offset, free_block->size);
142 if (size == free_block->size) {
143 used_block = free_block;
144 DRM_INFO("size == free_block->size: free_block = 0x%p\n",
146 list_del(&free_block->list);
148 used_block = xgi_mem_new_node();
150 if (used_block == NULL)
153 if (used_block == free_block) {
154 DRM_ERROR("used_block == free_block = 0x%p\n",
158 used_block->offset = free_block->offset;
159 used_block->size = size;
161 free_block->offset += size;
162 free_block->size -= size;
165 heap->max_freesize -= size;
167 list_add(&used_block->list, &heap->used_list);
172 int xgi_mem_free(struct xgi_mem_heap * heap, unsigned long offset,
173 struct drm_file * filp)
175 struct xgi_mem_block *used_block = NULL, *block;
176 struct xgi_mem_block *prev, *next;
181 list_for_each_entry(block, &heap->used_list, list) {
182 if (block->offset == offset) {
187 if (&block->list == &heap->used_list) {
188 DRM_ERROR("can't find block: 0x%lx to free!\n", offset);
192 if (block->filp != filp) {
197 DRM_INFO("used_block: 0x%p, offset = 0x%lx, size = 0x%lx\n",
198 used_block, used_block->offset, used_block->size);
200 heap->max_freesize += used_block->size;
203 upper = used_block->offset + used_block->size;
204 lower = used_block->offset;
206 list_for_each_entry(block, &heap->free_list, list) {
207 if (block->offset == upper) {
209 } else if ((block->offset + block->size) == lower) {
214 DRM_INFO("next = 0x%p, prev = 0x%p\n", next, prev);
215 list_del(&used_block->list);
218 prev->size += (used_block->size + next->size);
219 list_del(&next->list);
220 DRM_INFO("free node 0x%p\n", next);
221 kmem_cache_free(xgi_mem_block_cache, next);
222 kmem_cache_free(xgi_mem_block_cache, used_block);
225 prev->size += used_block->size;
226 DRM_INFO("free node 0x%p\n", used_block);
227 kmem_cache_free(xgi_mem_block_cache, used_block);
230 next->size += used_block->size;
231 next->offset = used_block->offset;
232 DRM_INFO("free node 0x%p\n", used_block);
233 kmem_cache_free(xgi_mem_block_cache, used_block);
236 list_add(&used_block->list, &heap->free_list);
237 DRM_INFO("Recycled free node %p, offset = 0x%lx, size = 0x%lx\n",
238 used_block, used_block->offset, used_block->size);
245 int xgi_fb_alloc(struct xgi_info * info, struct xgi_mem_alloc * alloc,
246 struct drm_file * filp)
248 struct xgi_mem_block *block;
250 if (alloc->is_front) {
251 alloc->location = XGI_MEMLOC_LOCAL;
255 ("Video RAM allocation on front buffer successfully! \n");
258 block = xgi_mem_alloc(&info->fb_heap, alloc->size);
262 alloc->location = XGI_MEMLOC_LOCAL;
264 DRM_ERROR("Video RAM allocation failed\n");
267 DRM_INFO("Video RAM allocation succeeded: 0x%p\n",
268 (char *)block->offset);
269 alloc->location = XGI_MEMLOC_LOCAL;
270 alloc->size = block->size;
271 alloc->offset = block->offset;
272 alloc->hw_addr = block->offset;
282 int xgi_fb_alloc_ioctl(struct drm_device * dev, void * data,
283 struct drm_file * filp)
285 struct xgi_mem_alloc *alloc =
286 (struct xgi_mem_alloc *) data;
287 struct xgi_info *info = dev->dev_private;
289 return xgi_fb_alloc(info, alloc, filp);
293 int xgi_fb_free(struct xgi_info * info, unsigned long offset,
294 struct drm_file * filp)
299 DRM_INFO("free onscreen frame buffer successfully !\n");
302 err = xgi_mem_free(&info->fb_heap, offset, filp);
310 int xgi_fb_free_ioctl(struct drm_device * dev, void * data,
311 struct drm_file * filp)
313 struct xgi_info *info = dev->dev_private;
315 return xgi_fb_free(info, *(u32 *) data, filp);
319 int xgi_fb_heap_init(struct xgi_info * info)
321 return xgi_mem_heap_init(&info->fb_heap, XGI_FB_HEAP_START,
326 * Free all blocks associated with a particular file handle.
328 void xgi_fb_free_all(struct xgi_info * info, struct drm_file * filp)
330 if (!info->fb_heap.initialized) {
337 struct xgi_mem_block *block;
339 list_for_each_entry(block, &info->fb_heap.used_list, list) {
340 if (block->filp == filp) {
345 if (&block->list == &info->fb_heap.used_list) {
349 (void) xgi_mem_free(&info->fb_heap, block->offset, filp);