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 */
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()
89  * search empty region on PTB with the given size
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
99 	int size;  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()
108 		if (size == npages) {  in search_empty_map_area()
110 			return page;  in search_empty_map_area()
112 		else if (size > max_size) {  in search_empty_map_area()
114 			max_size = size;  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()
121 	if (size >= max_size) {  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()
161  * return the size of resultant empty pages
171 	/* calculate the expected size of empty region */  in unmap_memblk()
172 	if ((p = blk->mapped_link.prev) != &emu->mapped_link_head) {  in unmap_memblk()
174 		start_page = q->mapped_page + q->pages;  in unmap_memblk()
177 	if ((p = blk->mapped_link.next) != &emu->mapped_link_head) {  in unmap_memblk()
179 		end_page = q->mapped_page;  in unmap_memblk()
181 		end_page = (emu->address_mode ? MAX_ALIGN_PAGES1 : MAX_ALIGN_PAGES0);  in unmap_memblk()
184 	list_del(&blk->mapped_link);  in unmap_memblk()
185 	list_del(&blk->mapped_order_link);  in unmap_memblk()
187 	mpage = blk->mapped_page;  in unmap_memblk()
188 	for (pg = blk->first_page; pg <= blk->last_page; pg++) {  in unmap_memblk()
192 	blk->mapped_page = -1;  in unmap_memblk()
193 	return end_page - start_page; /* return the new empty size */  in unmap_memblk()
197  * search empty pages with the given size, and create a memory block
199  * unlike synth_alloc the memory block is aligned to the page start
202 search_empty(struct snd_emu10k1 *emu, int size)  in search_empty()  argument
206 	int page, psize;  in search_empty()  local
208 	psize = get_aligned_page(size + PAGE_SIZE -1);  in search_empty()
209 	page = 0;  in search_empty()
210 	list_for_each(p, &emu->memhdr->block) {  in search_empty()
212 		if (page + psize <= blk->first_page)  in search_empty()
214 		page = blk->last_page + 1;  in search_empty()
216 	if (page + psize > emu->max_cache_pages)  in search_empty()
221 …blk = (struct snd_emu10k1_memblk *)__snd_util_memblk_new(emu->memhdr, psize << PAGE_SHIFT, p->prev…  in search_empty()
224 	blk->mem.offset = aligned_page_offset(page); /* set aligned offset */  in search_empty()
235 	if (addr & ~emu->dma_mask) {  in is_valid_page()
236 		dev_err_ratelimited(emu->card->dev,  in is_valid_page()
237 			"max memory size is 0x%lx (addr = 0x%lx)!!\n",  in is_valid_page()
238 			emu->dma_mask, (unsigned long)addr);  in is_valid_page()
241 	if (addr & (EMUPAGESIZE-1)) {  in is_valid_page()
242 		dev_err_ratelimited(emu->card->dev, "page is not aligned\n");  in is_valid_page()
257 	int size;  in snd_emu10k1_memblk_map()  local
262 	spin_lock_irqsave(&emu->memblk_lock, flags);  in snd_emu10k1_memblk_map()
263 	if (blk->mapped_page >= 0) {  in snd_emu10k1_memblk_map()
265 		list_move_tail(&blk->mapped_order_link,  in snd_emu10k1_memblk_map()
266 			       &emu->mapped_order_link_head);  in snd_emu10k1_memblk_map()
267 		spin_unlock_irqrestore(&emu->memblk_lock, flags);  in snd_emu10k1_memblk_map()
271 		/* no enough page - try to unmap some blocks */  in snd_emu10k1_memblk_map()
273 		p = emu->mapped_order_link_head.next;  in snd_emu10k1_memblk_map()
274 		for (; p != &emu->mapped_order_link_head; p = nextp) {  in snd_emu10k1_memblk_map()
275 			nextp = p->next;  in snd_emu10k1_memblk_map()
277 			if (deleted->map_locked)  in snd_emu10k1_memblk_map()
279 			size = unmap_memblk(emu, deleted);  in snd_emu10k1_memblk_map()
280 			if (size >= blk->pages) {  in snd_emu10k1_memblk_map()
287 	spin_unlock_irqrestore(&emu->memblk_lock, flags);  in snd_emu10k1_memblk_map()
294  * page allocation for DMA
299 	struct snd_pcm_runtime *runtime = substream->runtime;  in snd_emu10k1_alloc_pages()
302 	int page, err, idx;  in snd_emu10k1_alloc_pages()  local
306 	if (snd_BUG_ON(runtime->dma_bytes <= 0 ||  in snd_emu10k1_alloc_pages()
307 		       runtime->dma_bytes >= (emu->address_mode ? MAXPAGES1 : MAXPAGES0) * EMUPAGESIZE))  in snd_emu10k1_alloc_pages()
309 	hdr = emu->memhdr;  in snd_emu10k1_alloc_pages()
313 	idx = runtime->period_size >= runtime->buffer_size ?  in snd_emu10k1_alloc_pages()
314 					(emu->delay_pcm_irq * 2) : 0;  in snd_emu10k1_alloc_pages()
315 	mutex_lock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
316 	blk = search_empty(emu, runtime->dma_bytes + idx);  in snd_emu10k1_alloc_pages()
318 		mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
325 	for (page = blk->first_page; page <= blk->last_page; page++, idx++) {  in snd_emu10k1_alloc_pages()
328 		if (ofs >= runtime->dma_bytes)  in snd_emu10k1_alloc_pages()
329 			addr = emu->silent_page.addr;  in snd_emu10k1_alloc_pages()
333 			dev_err_ratelimited(emu->card->dev,  in snd_emu10k1_alloc_pages()
334 				"emu: failure page = %d\n", idx);  in snd_emu10k1_alloc_pages()
335 			mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
338 		emu->page_addr_table[page] = addr;  in snd_emu10k1_alloc_pages()
339 		emu->page_ptr_table[page] = NULL;  in snd_emu10k1_alloc_pages()
343 	blk->map_locked = 1; /* do not unmap this block! */  in snd_emu10k1_alloc_pages()
347 		mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
350 	mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_alloc_pages()
356  * release DMA buffer from page table
361 		return -EINVAL;  in snd_emu10k1_free_pages()
374 int snd_emu10k1_alloc_pages_maybe_wider(struct snd_emu10k1 *emu, size_t size,  in snd_emu10k1_alloc_pages_maybe_wider()  argument
377 	if (emu->iommu_workaround) {  in snd_emu10k1_alloc_pages_maybe_wider()
378 		size_t npages = (size + PAGE_SIZE - 1) / PAGE_SIZE;  in snd_emu10k1_alloc_pages_maybe_wider()
385 		if (size_real < size + 1024)  in snd_emu10k1_alloc_pages_maybe_wider()
386 			size += PAGE_SIZE;  in snd_emu10k1_alloc_pages_maybe_wider()
390 				   &emu->pci->dev, size, dmab);  in snd_emu10k1_alloc_pages_maybe_wider()
395  * Unlike the DMA allocation above, non-contiguous pages are assined.
402 snd_emu10k1_synth_alloc(struct snd_emu10k1 *hw, unsigned int size)  in snd_emu10k1_synth_alloc()  argument
405 	struct snd_util_memhdr *hdr = hw->memhdr;   in snd_emu10k1_synth_alloc()
407 	mutex_lock(&hdr->block_mutex);  in snd_emu10k1_synth_alloc()
408 	blk = (struct snd_emu10k1_memblk *)__snd_util_mem_alloc(hdr, size);  in snd_emu10k1_synth_alloc()
410 		mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_synth_alloc()
415 		mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_synth_alloc()
419 	mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_synth_alloc()
431 	struct snd_util_memhdr *hdr = emu->memhdr;   in snd_emu10k1_synth_free()
435 	mutex_lock(&hdr->block_mutex);  in snd_emu10k1_synth_free()
436 	spin_lock_irqsave(&emu->memblk_lock, flags);  in snd_emu10k1_synth_free()
437 	if (blk->mapped_page >= 0)  in snd_emu10k1_synth_free()
439 	spin_unlock_irqrestore(&emu->memblk_lock, flags);  in snd_emu10k1_synth_free()
442 	mutex_unlock(&hdr->block_mutex);  in snd_emu10k1_synth_free()
456 	first_page = blk->first_page;  in get_single_page_range()
457 	if ((p = blk->mem.list.prev) != &hdr->block) {  in get_single_page_range()
459 		if (q->last_page == first_page)  in get_single_page_range()
460 			first_page++;  /* first page was already allocated */  in get_single_page_range()
462 	last_page = blk->last_page;  in get_single_page_range()
463 	if ((p = blk->mem.list.next) != &hdr->block) {  in get_single_page_range()
465 		if (q->first_page == last_page)  in get_single_page_range()
466 			last_page--; /* last page was already allocated */  in get_single_page_range()
477 	int page;  in __synth_free_pages()  local
480 	dmab.dev.dev = &emu->pci->dev;  in __synth_free_pages()
482 	for (page = first_page; page <= last_page; page++) {  in __synth_free_pages()
483 		if (emu->page_ptr_table[page] == NULL)  in __synth_free_pages()
485 		dmab.area = emu->page_ptr_table[page];  in __synth_free_pages()
486 		dmab.addr = emu->page_addr_table[page];  in __synth_free_pages()
493 		if (emu->iommu_workaround)  in __synth_free_pages()
497 		emu->page_addr_table[page] = 0;  in __synth_free_pages()
498 		emu->page_ptr_table[page] = NULL;  in __synth_free_pages()
507 	int page, first_page, last_page;  in synth_alloc_pages()  local
511 	get_single_page_range(emu->memhdr, blk, &first_page, &last_page);  in synth_alloc_pages()
513 	for (page = first_page; page <= last_page; page++) {  in synth_alloc_pages()
521 		emu->page_addr_table[page] = dmab.addr;  in synth_alloc_pages()
522 		emu->page_ptr_table[page] = dmab.area;  in synth_alloc_pages()
528 	last_page = page - 1;  in synth_alloc_pages()
531 	return -ENOMEM;  in synth_alloc_pages()
541 	get_single_page_range(emu->memhdr, blk, &first_page, &last_page);  in synth_free_pages()
547 static inline void *offset_ptr(struct snd_emu10k1 *emu, int page, int offset)  in offset_ptr()  argument
550 	if (snd_BUG_ON(page < 0 || page >= emu->max_cache_pages))  in offset_ptr()
552 	ptr = emu->page_ptr_table[page];  in offset_ptr()
554 		dev_err(emu->card->dev,  in offset_ptr()
555 			"access to NULL ptr: page = %d\n", page);  in offset_ptr()
558 	ptr += offset & (PAGE_SIZE - 1);  in offset_ptr()
563  * bzero(blk + offset, size)
566 			    int offset, int size)  in snd_emu10k1_synth_bzero()  argument
568 	int page, nextofs, end_offset, temp, temp1;  in snd_emu10k1_synth_bzero()  local
572 	offset += blk->offset & (PAGE_SIZE - 1);  in snd_emu10k1_synth_bzero()
573 	end_offset = offset + size;  in snd_emu10k1_synth_bzero()
574 	page = get_aligned_page(offset);  in snd_emu10k1_synth_bzero()
576 		nextofs = aligned_page_offset(page + 1);  in snd_emu10k1_synth_bzero()
577 		temp = nextofs - offset;  in snd_emu10k1_synth_bzero()
578 		temp1 = end_offset - offset;  in snd_emu10k1_synth_bzero()
581 		ptr = offset_ptr(emu, page + p->first_page, offset);  in snd_emu10k1_synth_bzero()
585 		page++;  in snd_emu10k1_synth_bzero()
593  * copy_from_user(blk + offset, data, size)
596 				     int offset, const char __user *data, int size)  in snd_emu10k1_synth_copy_from_user()  argument
598 	int page, nextofs, end_offset, temp, temp1;  in snd_emu10k1_synth_copy_from_user()  local
602 	offset += blk->offset & (PAGE_SIZE - 1);  in snd_emu10k1_synth_copy_from_user()
603 	end_offset = offset + size;  in snd_emu10k1_synth_copy_from_user()
604 	page = get_aligned_page(offset);  in snd_emu10k1_synth_copy_from_user()
606 		nextofs = aligned_page_offset(page + 1);  in snd_emu10k1_synth_copy_from_user()
607 		temp = nextofs - offset;  in snd_emu10k1_synth_copy_from_user()
608 		temp1 = end_offset - offset;  in snd_emu10k1_synth_copy_from_user()
611 		ptr = offset_ptr(emu, page + p->first_page, offset);  in snd_emu10k1_synth_copy_from_user()
613 			return -EFAULT;  in snd_emu10k1_synth_copy_from_user()
616 		page++;  in snd_emu10k1_synth_copy_from_user()