pci/emu10k1/memory.c

69 static int synth_alloc_pages(struct snd_emu10k1 *hw, struct snd_emu10k1_memblk *blk);
70 static int synth_free_pages(struct snd_emu10k1 *hw, struct snd_emu10k1_memblk *blk);
76 static void emu10k1_memblk_init(struct snd_emu10k1_memblk *blk)
78 	blk->mapped_page = -1;
79 	INIT_LIST_HEAD(&blk->mapped_link);
80 	INIT_LIST_HEAD(&blk->mapped_order_link);
81 	blk->map_locked = 0;
83 	blk->first_page = get_aligned_page(blk->mem.offset);
84 	blk->last_page = get_aligned_page(blk->mem.offset + blk->mem.size - 1);
85 	blk->pages = blk->last_page - blk->first_page + 1;
104 		struct snd_emu10k1_memblk *blk = get_emu10k1_memblk(pos, mapped_link);
105 		if (blk->mapped_page < 0)
107 		size = blk->mapped_page - page;
118 		page = blk->mapped_page + blk->pages;
134 static int map_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
139 	page = search_empty_map_area(emu, blk->pages, &next);
147 	list_add_tail(&blk->mapped_link, next);
149 	list_add_tail(&blk->mapped_order_link, &emu->mapped_order_link_head);
150 	blk->mapped_page = page;
152 	for (pg = blk->first_page; pg <= blk->last_page; pg++) {
165 static int unmap_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
172 	p = blk->mapped_link.prev;
179 	p = blk->mapped_link.next;
188 	list_del(&blk->mapped_link);
189 	list_del(&blk->mapped_order_link);
191 	mpage = blk->mapped_page;
192 	for (pg = blk->first_page; pg <= blk->last_page; pg++) {
196 	blk->mapped_page = -1;
209 	struct snd_emu10k1_memblk *blk;
215 		blk = get_emu10k1_memblk(p, mem.list);
216 		if (page + psize <= blk->first_page)
218 		page = blk->last_page + 1;
225 	blk = (struct snd_emu10k1_memblk *)__snd_util_memblk_new(emu->memhdr, psize << PAGE_SHIFT, p->prev);
226 	if (blk == NULL)
228 	blk->mem.offset = aligned_page_offset(page); /* set aligned offset */
229 	emu10k1_memblk_init(blk);
230 	return blk;
258 int snd_emu10k1_memblk_map(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
267 	if (blk->mapped_page >= 0) {
269 		list_move_tail(&blk->mapped_order_link,
274 	err = map_memblk(emu, blk);
285 			if (size >= blk->pages) {
287 				err = map_memblk(emu, blk);
306 	struct snd_emu10k1_memblk *blk;
319 	blk = search_empty(emu, runtime->dma_bytes);
320 	if (blk == NULL) {
328 	for (page = blk->first_page; page <= blk->last_page; page++, idx++) {
346 	blk->map_locked = 1; /* do not unmap this block! */
347 	err = snd_emu10k1_memblk_map(emu, blk);
349 		__snd_util_mem_free(hdr, (struct snd_util_memblk *)blk);
354 	return (struct snd_util_memblk *)blk;
361 int snd_emu10k1_free_pages(struct snd_emu10k1 *emu, struct snd_util_memblk *blk)
363 	if (snd_BUG_ON(!emu || !blk))
365 	return snd_emu10k1_synth_free(emu, blk);
407 	struct snd_emu10k1_memblk *blk;
411 	blk = (struct snd_emu10k1_memblk *)__snd_util_mem_alloc(hdr, size);
412 	if (blk == NULL) {
416 	if (synth_alloc_pages(hw, blk)) {
417 		__snd_util_mem_free(hdr, (struct snd_util_memblk *)blk);
421 	snd_emu10k1_memblk_map(hw, blk);
423 	return (struct snd_util_memblk *)blk;
435 	struct snd_emu10k1_memblk *blk = (struct snd_emu10k1_memblk *)memblk;
440 	if (blk->mapped_page >= 0)
441 		unmap_memblk(emu, blk);
443 	synth_free_pages(emu, blk);
453 				  struct snd_emu10k1_memblk *blk,
459 	first_page = blk->first_page;
460 	p = blk->mem.list.prev;
466 	last_page = blk->last_page;
467 	p = blk->mem.list.next;
510 static int synth_alloc_pages(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
515 	emu10k1_memblk_init(blk);
516 	get_single_page_range(emu->memhdr, blk, &first_page, &last_page);
542 static int synth_free_pages(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
546 	get_single_page_range(emu->memhdr, blk, &first_page, &last_page);
568  * bzero(blk + offset, size)
570 int snd_emu10k1_synth_bzero(struct snd_emu10k1 *emu, struct snd_util_memblk *blk,
575 	struct snd_emu10k1_memblk *p = (struct snd_emu10k1_memblk *)blk;
577 	offset += blk->offset & (PAGE_SIZE - 1);
598  * copy_from_user(blk + offset, data, size)
600 int snd_emu10k1_synth_copy_from_user(struct snd_emu10k1 *emu, struct snd_util_memblk *blk,
605 	struct snd_emu10k1_memblk *p = (struct snd_emu10k1_memblk *)blk;
607 	offset += blk->offset & (PAGE_SIZE - 1);