1 // SPDX-License-Identifier: GPL-2.0-or-later
6  *  EMU10K1 memory page allocation (PTB area)
18 /* page arguments of these two macros are Emu page (4096 bytes), not like
21 #define __set_ptb_entry(emu,page,addr) \  argument
22 	(((__le32 *)(emu)->ptb_pages.area)[page] = \
23 	 cpu_to_le32(((addr) << (emu->address_mode)) | (page)))
24 #define __get_ptb_entry(emu, page) \  argument
25 	(le32_to_cpu(((__le32 *)(emu)->ptb_pages.area)[page]))
30 /* get aligned page from offset address */
31 #define get_aligned_page(offset)	((offset) >> PAGE_SHIFT)  argument
32 /* get offset address from aligned page */
33 #define aligned_page_offset(page)	((page) << PAGE_SHIFT)  argument
36 /* fill PTB entrie(s) corresponding to page with addr */
37 #define set_ptb_entry(emu,page,addr)	__set_ptb_entry(emu,page,addr)  argument
38 /* fill PTB entrie(s) corresponding to page with silence pointer */
39 #define set_silent_ptb(emu,page)	__set_ptb_entry(emu,page,emu->silent_page.addr)  argument
41 /* fill PTB entries -- we need to fill UNIT_PAGES entries */
42 static inline void set_ptb_entry(struct snd_emu10k1 *emu, int page, dma_addr_t addr)  in set_ptb_entry()  argument
45 	page *= UNIT_PAGES;  in set_ptb_entry()
46 	for (i = 0; i < UNIT_PAGES; i++, page++) {  in set_ptb_entry()
47 		__set_ptb_entry(emu, page, addr);  in set_ptb_entry()
48 		dev_dbg(emu->card->dev, "mapped page %d to entry %.8x\n", page,  in set_ptb_entry()
49 			(unsigned int)__get_ptb_entry(emu, page));  in set_ptb_entry()
53 static inline void set_silent_ptb(struct snd_emu10k1 *emu, int page)  in set_silent_ptb()  argument
56 	page *= UNIT_PAGES;  in set_silent_ptb()
57 	for (i = 0; i < UNIT_PAGES; i++, page++) {  in set_silent_ptb()
59 		__set_ptb_entry(emu, page, emu->silent_page.addr);  in set_silent_ptb()
60 		dev_dbg(emu->card->dev, "mapped silent page %d to entry %.8x\n",  in set_silent_ptb()
61 			page, (unsigned int)__get_ptb_entry(emu, page));  in set_silent_ptb()
78 	blk->mapped_page = -1;  in emu10k1_memblk_init()
79 	INIT_LIST_HEAD(&blk->mapped_link);  in emu10k1_memblk_init()
80 	INIT_LIST_HEAD(&blk->mapped_order_link);  in emu10k1_memblk_init()
81 	blk->map_locked = 0;  in emu10k1_memblk_init()
83 	blk->first_page = get_aligned_page(blk->mem.offset);  in emu10k1_memblk_init()
84 	blk->last_page = get_aligned_page(blk->mem.offset + blk->mem.size - 1);  in emu10k1_memblk_init()
85 	blk->pages = blk->last_page - blk->first_page + 1;  in emu10k1_memblk_init()
91  * if an empty region is found, return the page and store the next mapped block
97 	int page = 1, found_page = -ENOMEM;  in search_empty_map_area()  local
100 	struct list_head *candidate = &emu->mapped_link_head;  in search_empty_map_area()
103 	list_for_each (pos, &emu->mapped_link_head) {  in search_empty_map_area()
105 		if (blk->mapped_page < 0)  in search_empty_map_area()
107 		size = blk->mapped_page - page;  in search_empty_map_area()
110 			return page;  in search_empty_map_area()
116 			found_page = page;  in search_empty_map_area()
118 		page = blk->mapped_page + blk->pages;  in search_empty_map_area()
120 	size = (emu->address_mode ? MAX_ALIGN_PAGES1 : MAX_ALIGN_PAGES0) - page;  in search_empty_map_area()
123 		return page;  in search_empty_map_area()
136 	int page, pg;  in map_memblk()  local
139 	page = search_empty_map_area(emu, blk->pages, &next);  in map_memblk()
140 	if (page < 0) /* not found */  in map_memblk()
141 		return page;  in map_memblk()
142 	if (page == 0) {  in map_memblk()
143 		dev_err(emu->card->dev, "trying to map zero (reserved) page\n");  in map_memblk()
144 		return -EINVAL;  in map_memblk()
147 	list_add_tail(&blk->mapped_link, next);  in map_memblk()
149 	list_add_tail(&blk->mapped_order_link, &emu->mapped_order_link_head);  in map_memblk()
150 	blk->mapped_page = page;  in map_memblk()
152 	for (pg = blk->first_page; pg <= blk->last_page; pg++) {  in map_memblk()
153 		set_ptb_entry(emu, page, emu->page_addr_table[pg]);  in map_memblk()
154 		page++;  in map_memblk()
172 	p = blk->mapped_link.prev;  in unmap_memblk()
173 	if (p != &emu->mapped_link_head) {  in unmap_memblk()
175 		start_page = q->mapped_page + q->pages;  in unmap_memblk()
179 	p = blk->mapped_link.next;  in unmap_memblk()
180 	if (p != &emu->mapped_link_head) {  in unmap_memblk()
182 		end_page = q->mapped_page;  in unmap_memblk()
184 		end_page = (emu->address_mode ? MAX_ALIGN_PAGES1 : MAX_ALIGN_PAGES0);  in unmap_memblk()
188 	list_del(&blk->mapped_link);  in unmap_memblk()
189 	list_del(&blk->mapped_order_link);  in unmap_memblk()
191 	mpage = blk->mapped_page;  in unmap_memblk()
192 	for (pg = blk->first_page; pg <= blk->last_page; pg++) {  in unmap_memblk()
196 	blk->mapped_page = -1;  in unmap_memblk()
197 	return end_page - start_page; /* return the new empty size */  in unmap_memblk()
203  * unlike synth_alloc the memory block is aligned to the page start
210 	int page, psize;  in search_empty()  local
212 	psize = get_aligned_page(size + PAGE_SIZE -1);  in search_empty()
213 	page = 0;  in search_empty()
214 	list_for_each(p, &emu->memhdr->block) {  in search_empty()
216 		if (page + psize <= blk->first_page)  in search_empty()
218 		page = blk->last_page + 1;  in search_empty()
220 	if (page + psize > emu->max_cache_pages)  in search_empty()
225 …blk = (struct snd_emu10k1_memblk *)__snd_util_memblk_new(emu->memhdr, psize << PAGE_SHIFT, p->prev…  in search_empty()
228 	blk->mem.offset = aligned_page_offset(page); /* set aligned offset */  in search_empty()
239 	if (addr & ~emu->dma_mask) {  in is_valid_page()
240 		dev_err_ratelimited(emu->card->dev,  in is_valid_page()
242 			emu->dma_mask, (unsigned long)addr);  in is_valid_page()
245 	if (addr & (EMUPAGESIZE-1)) {  in is_valid_page()
246 		dev_err_ratelimited(emu->card->dev, "page is not aligned\n");  in is_valid_page()
266 	spin_lock_irqsave(&emu->memblk_lock, flags);  in snd_emu10k1_memblk_map()
267 	if (blk->mapped_page >= 0) {  in snd_emu10k1_memblk_map()
269 		list_move_tail(&blk->mapped_order_link,  in snd_emu10k1_memblk_map()
270 			       &emu->mapped_order_link_head);  in snd_emu10k1_memblk_map()
271 		spin_unlock_irqrestore(&emu->memblk_lock, flags);  in snd_emu10k1_memblk_map()
276 		/* no enough page - try to unmap some blocks */  in snd_emu10k1_memblk_map()
278 		p = emu->mapped_order_link_head.next;  in snd_emu10k1_memblk_map()
279 		for (; p != &emu->mapped_order_link_head; p = nextp) {  in snd_emu10k1_memblk_map()
280 			nextp = p->next;  in snd_emu10k1_memblk_map()
282 			if (deleted->map_locked)  in snd_emu10k1_memblk_map()
285 			if (size >= blk->pages) {  in snd_emu10k1_memblk_map()
292 	spin_unlock_irqrestore(&emu->memblk_lock, flags);  in snd_emu10k1_memblk_map()
299  * page allocation for DMA
304 	struct snd_pcm_runtime *runtime = substream->runtime;  in snd_emu10k1_alloc_pages()
307 	int page, err, idx;  in snd_emu10k1_alloc_pages()  local
311 	if (snd_BUG_ON(runtime->dma_bytes <= 0 ||  in snd_emu10k1_alloc_pages()
312 		       runtime->dma_bytes >= (emu->address_mode ? MAXPAGES1 : MAXPAGES0) * EMUPAGESIZE))  in snd_emu10k1_alloc_pages()
314 	hdr = emu->memhdr;  in snd_emu10k1_alloc_pages()
318 	mutex_lock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
319 	blk = search_empty(emu, runtime->dma_bytes);  in snd_emu10k1_alloc_pages()
321 		mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
328 	for (page = blk->first_page; page <= blk->last_page; page++, idx++) {  in snd_emu10k1_alloc_pages()
331 		if (ofs >= runtime->dma_bytes)  in snd_emu10k1_alloc_pages()
332 			addr = emu->silent_page.addr;  in snd_emu10k1_alloc_pages()
336 			dev_err_ratelimited(emu->card->dev,  in snd_emu10k1_alloc_pages()
337 				"emu: failure page = %d\n", idx);  in snd_emu10k1_alloc_pages()
338 			mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
341 		emu->page_addr_table[page] = addr;  in snd_emu10k1_alloc_pages()
342 		emu->page_ptr_table[page] = NULL;  in snd_emu10k1_alloc_pages()
346 	blk->map_locked = 1; /* do not unmap this block! */  in snd_emu10k1_alloc_pages()
350 		mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
353 	mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
359  * release DMA buffer from page table
364 		return -EINVAL;  in snd_emu10k1_free_pages()
380 	if (emu->iommu_workaround) {  in snd_emu10k1_alloc_pages_maybe_wider()
393 				   &emu->pci->dev, size, dmab);  in snd_emu10k1_alloc_pages_maybe_wider()
398  * Unlike the DMA allocation above, non-contiguous pages are assined.
408 	struct snd_util_memhdr *hdr = hw->memhdr;   in snd_emu10k1_synth_alloc()
410 	mutex_lock(&hdr->block_mutex);  in snd_emu10k1_synth_alloc()
413 		mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_synth_alloc()
418 		mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_synth_alloc()
422 	mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_synth_alloc()
434 	struct snd_util_memhdr *hdr = emu->memhdr;   in snd_emu10k1_synth_free()
438 	mutex_lock(&hdr->block_mutex);  in snd_emu10k1_synth_free()
439 	spin_lock_irqsave(&emu->memblk_lock, flags);  in snd_emu10k1_synth_free()
440 	if (blk->mapped_page >= 0)  in snd_emu10k1_synth_free()
442 	spin_unlock_irqrestore(&emu->memblk_lock, flags);  in snd_emu10k1_synth_free()
445 	mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_synth_free()
459 	first_page = blk->first_page;  in get_single_page_range()
460 	p = blk->mem.list.prev;  in get_single_page_range()
461 	if (p != &hdr->block) {  in get_single_page_range()
463 		if (q->last_page == first_page)  in get_single_page_range()
464 			first_page++;  /* first page was already allocated */  in get_single_page_range()
466 	last_page = blk->last_page;  in get_single_page_range()
467 	p = blk->mem.list.next;  in get_single_page_range()
468 	if (p != &hdr->block) {  in get_single_page_range()
470 		if (q->first_page == last_page)  in get_single_page_range()
471 			last_page--; /* last page was already allocated */  in get_single_page_range()
482 	int page;  in __synth_free_pages()  local
485 	dmab.dev.dev = &emu->pci->dev;  in __synth_free_pages()
487 	for (page = first_page; page <= last_page; page++) {  in __synth_free_pages()
488 		if (emu->page_ptr_table[page] == NULL)  in __synth_free_pages()
490 		dmab.area = emu->page_ptr_table[page];  in __synth_free_pages()
491 		dmab.addr = emu->page_addr_table[page];  in __synth_free_pages()
498 		if (emu->iommu_workaround)  in __synth_free_pages()
502 		emu->page_addr_table[page] = 0;  in __synth_free_pages()
503 		emu->page_ptr_table[page] = NULL;  in __synth_free_pages()
512 	int page, first_page, last_page;  in synth_alloc_pages()  local
516 	get_single_page_range(emu->memhdr, blk, &first_page, &last_page);  in synth_alloc_pages()
518 	for (page = first_page; page <= last_page; page++) {  in synth_alloc_pages()
526 		emu->page_addr_table[page] = dmab.addr;  in synth_alloc_pages()
527 		emu->page_ptr_table[page] = dmab.area;  in synth_alloc_pages()
533 	last_page = page - 1;  in synth_alloc_pages()
536 	return -ENOMEM;  in synth_alloc_pages()
546 	get_single_page_range(emu->memhdr, blk, &first_page, &last_page);  in synth_free_pages()
551 /* calculate buffer pointer from offset address */
552 static inline void *offset_ptr(struct snd_emu10k1 *emu, int page, int offset)  in offset_ptr()  argument
555 	if (snd_BUG_ON(page < 0 || page >= emu->max_cache_pages))  in offset_ptr()
557 	ptr = emu->page_ptr_table[page];  in offset_ptr()
559 		dev_err(emu->card->dev,  in offset_ptr()
560 			"access to NULL ptr: page = %d\n", page);  in offset_ptr()
563 	ptr += offset & (PAGE_SIZE - 1);  in offset_ptr()
568  * memset(blk + offset, value, size)
571 			     int offset, int size, u8 value)  in snd_emu10k1_synth_memset()  argument
573 	int page, nextofs, end_offset, temp, temp1;  in snd_emu10k1_synth_memset()  local
577 	if (snd_BUG_ON(offset + size > p->mem.size))  in snd_emu10k1_synth_memset()
578 		return -EFAULT;  in snd_emu10k1_synth_memset()
580 	offset += blk->offset & (PAGE_SIZE - 1);  in snd_emu10k1_synth_memset()
581 	end_offset = offset + size;  in snd_emu10k1_synth_memset()
582 	page = get_aligned_page(offset);  in snd_emu10k1_synth_memset()
584 		nextofs = aligned_page_offset(page + 1);  in snd_emu10k1_synth_memset()
585 		temp = nextofs - offset;  in snd_emu10k1_synth_memset()
586 		temp1 = end_offset - offset;  in snd_emu10k1_synth_memset()
589 		ptr = offset_ptr(emu, page + p->first_page, offset);  in snd_emu10k1_synth_memset()
592 		offset = nextofs;  in snd_emu10k1_synth_memset()
593 		page++;  in snd_emu10k1_synth_memset()
594 	} while (offset < end_offset);  in snd_emu10k1_synth_memset()
606 		size--;  in xor_range()
611 		size -= 2;  in xor_range()
616 		size -= 4;  in xor_range()
621 		size -= 2;  in xor_range()
628  * copy_from_user(blk + offset, data, size) ^ xor
631 				     int offset, const char __user *data, int size, u32 xor)  in snd_emu10k1_synth_copy_from_user()  argument
633 	int page, nextofs, end_offset, temp, temp1;  in snd_emu10k1_synth_copy_from_user()  local
637 	if (snd_BUG_ON(offset + size > p->mem.size))  in snd_emu10k1_synth_copy_from_user()
638 		return -EFAULT;  in snd_emu10k1_synth_copy_from_user()
640 	offset += blk->offset & (PAGE_SIZE - 1);  in snd_emu10k1_synth_copy_from_user()
641 	end_offset = offset + size;  in snd_emu10k1_synth_copy_from_user()
642 	page = get_aligned_page(offset);  in snd_emu10k1_synth_copy_from_user()
644 		nextofs = aligned_page_offset(page + 1);  in snd_emu10k1_synth_copy_from_user()
645 		temp = nextofs - offset;  in snd_emu10k1_synth_copy_from_user()
646 		temp1 = end_offset - offset;  in snd_emu10k1_synth_copy_from_user()
649 		ptr = offset_ptr(emu, page + p->first_page, offset);  in snd_emu10k1_synth_copy_from_user()
652 				return -EFAULT;  in snd_emu10k1_synth_copy_from_user()
656 		offset = nextofs;  in snd_emu10k1_synth_copy_from_user()
658 		page++;  in snd_emu10k1_synth_copy_from_user()
659 	} while (offset < end_offset);  in snd_emu10k1_synth_copy_from_user()