2 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
3 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
4 * Copyright (c) by Scott McNab <sdm@fractalgraphics.com.au>
6 * Trident 4DWave-NX memory page allocation (TLB area)
7 * Trident chip can handle only 16MByte of the memory at the same time.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include <linux/pci.h>
28 #include <linux/time.h>
29 #include <linux/mutex.h>
31 #include <sound/core.h>
32 #include <sound/trident.h>
34 /* page arguments of these two macros are Trident page (4096 bytes), not like
35 * aligned pages in others
37 #define __set_tlb_bus(trident,page,ptr,addr) \
38 do { (trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1)); \
39 (trident)->tlb.shadow_entries[page] = (ptr); } while (0)
40 #define __tlb_to_ptr(trident,page) \
41 (void*)((trident)->tlb.shadow_entries[page])
42 #define __tlb_to_addr(trident,page) \
43 (dma_addr_t)le32_to_cpu((trident->tlb.entries[page]) & ~(SNDRV_TRIDENT_PAGE_SIZE - 1))
46 /* page size == SNDRV_TRIDENT_PAGE_SIZE */
47 #define ALIGN_PAGE_SIZE PAGE_SIZE /* minimum page size for allocation */
48 #define MAX_ALIGN_PAGES SNDRV_TRIDENT_MAX_PAGES /* maxmium aligned pages */
49 /* fill TLB entrie(s) corresponding to page with ptr */
50 #define set_tlb_bus(trident,page,ptr,addr) __set_tlb_bus(trident,page,ptr,addr)
51 /* fill TLB entrie(s) corresponding to page with silence pointer */
52 #define set_silent_tlb(trident,page) __set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr)
53 /* get aligned page from offset address */
54 #define get_aligned_page(offset) ((offset) >> 12)
55 /* get offset address from aligned page */
56 #define aligned_page_offset(page) ((page) << 12)
57 /* get buffer address from aligned page */
58 #define page_to_ptr(trident,page) __tlb_to_ptr(trident, page)
59 /* get PCI physical address from aligned page */
60 #define page_to_addr(trident,page) __tlb_to_addr(trident, page)
62 #elif PAGE_SIZE == 8192
63 /* page size == SNDRV_TRIDENT_PAGE_SIZE x 2*/
64 #define ALIGN_PAGE_SIZE PAGE_SIZE
65 #define MAX_ALIGN_PAGES (SNDRV_TRIDENT_MAX_PAGES / 2)
66 #define get_aligned_page(offset) ((offset) >> 13)
67 #define aligned_page_offset(page) ((page) << 13)
68 #define page_to_ptr(trident,page) __tlb_to_ptr(trident, (page) << 1)
69 #define page_to_addr(trident,page) __tlb_to_addr(trident, (page) << 1)
71 /* fill TLB entries -- we need to fill two entries */
72 static inline void set_tlb_bus(struct snd_trident *trident, int page,
73 unsigned long ptr, dma_addr_t addr)
76 __set_tlb_bus(trident, page, ptr, addr);
77 __set_tlb_bus(trident, page+1, ptr + SNDRV_TRIDENT_PAGE_SIZE, addr + SNDRV_TRIDENT_PAGE_SIZE);
79 static inline void set_silent_tlb(struct snd_trident *trident, int page)
82 __set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
83 __set_tlb_bus(trident, page+1, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
88 #define UNIT_PAGES (PAGE_SIZE / SNDRV_TRIDENT_PAGE_SIZE)
89 #define ALIGN_PAGE_SIZE (SNDRV_TRIDENT_PAGE_SIZE * UNIT_PAGES)
90 #define MAX_ALIGN_PAGES (SNDRV_TRIDENT_MAX_PAGES / UNIT_PAGES)
91 /* Note: if alignment doesn't match to the maximum size, the last few blocks
92 * become unusable. To use such blocks, you'll need to check the validity
93 * of accessing page in set_tlb_bus and set_silent_tlb. search_empty()
94 * should also check it, too.
96 #define get_aligned_page(offset) ((offset) / ALIGN_PAGE_SIZE)
97 #define aligned_page_offset(page) ((page) * ALIGN_PAGE_SIZE)
98 #define page_to_ptr(trident,page) __tlb_to_ptr(trident, (page) * UNIT_PAGES)
99 #define page_to_addr(trident,page) __tlb_to_addr(trident, (page) * UNIT_PAGES)
101 /* fill TLB entries -- UNIT_PAGES entries must be filled */
102 static inline void set_tlb_bus(struct snd_trident *trident, int page,
103 unsigned long ptr, dma_addr_t addr)
107 for (i = 0; i < UNIT_PAGES; i++, page++) {
108 __set_tlb_bus(trident, page, ptr, addr);
109 ptr += SNDRV_TRIDENT_PAGE_SIZE;
110 addr += SNDRV_TRIDENT_PAGE_SIZE;
113 static inline void set_silent_tlb(struct snd_trident *trident, int page)
117 for (i = 0; i < UNIT_PAGES; i++, page++)
118 __set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
121 #endif /* PAGE_SIZE */
123 /* calculate buffer pointer from offset address */
124 static inline void *offset_ptr(struct snd_trident *trident, int offset)
127 ptr = page_to_ptr(trident, get_aligned_page(offset));
128 ptr += offset % ALIGN_PAGE_SIZE;
132 /* first and last (aligned) pages of memory block */
133 #define firstpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->first_page)
134 #define lastpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->last_page)
137 * search empty pages which may contain given size
139 static struct snd_util_memblk *
140 search_empty(struct snd_util_memhdr *hdr, int size)
142 struct snd_util_memblk *blk, *prev;
146 psize = get_aligned_page(size + ALIGN_PAGE_SIZE -1);
149 list_for_each(p, &hdr->block) {
150 blk = list_entry(p, struct snd_util_memblk, list);
151 if (page + psize <= firstpg(blk))
153 page = lastpg(blk) + 1;
155 if (page + psize > MAX_ALIGN_PAGES)
159 /* create a new memory block */
160 blk = __snd_util_memblk_new(hdr, psize * ALIGN_PAGE_SIZE, p->prev);
163 blk->offset = aligned_page_offset(page); /* set aligned offset */
165 lastpg(blk) = page + psize - 1;
171 * check if the given pointer is valid for pages
173 static int is_valid_page(unsigned long ptr)
175 if (ptr & ~0x3fffffffUL) {
176 snd_printk(KERN_ERR "max memory size is 1GB!!\n");
179 if (ptr & (SNDRV_TRIDENT_PAGE_SIZE-1)) {
180 snd_printk(KERN_ERR "page is not aligned\n");
187 * page allocation for DMA (Scatter-Gather version)
189 static struct snd_util_memblk *
190 snd_trident_alloc_sg_pages(struct snd_trident *trident,
191 struct snd_pcm_substream *substream)
193 struct snd_util_memhdr *hdr;
194 struct snd_util_memblk *blk;
195 struct snd_pcm_runtime *runtime = substream->runtime;
198 if (snd_BUG_ON(runtime->dma_bytes <= 0 ||
199 runtime->dma_bytes > SNDRV_TRIDENT_MAX_PAGES *
200 SNDRV_TRIDENT_PAGE_SIZE))
202 hdr = trident->tlb.memhdr;
203 if (snd_BUG_ON(!hdr))
208 mutex_lock(&hdr->block_mutex);
209 blk = search_empty(hdr, runtime->dma_bytes);
211 mutex_unlock(&hdr->block_mutex);
215 /* set TLB entries */
217 for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) {
218 unsigned long ofs = idx << PAGE_SHIFT;
219 dma_addr_t addr = snd_pcm_sgbuf_get_addr(substream, ofs);
220 unsigned long ptr = (unsigned long)
221 snd_pcm_sgbuf_get_ptr(substream, ofs);
222 if (! is_valid_page(addr)) {
223 __snd_util_mem_free(hdr, blk);
224 mutex_unlock(&hdr->block_mutex);
227 set_tlb_bus(trident, page, ptr, addr);
229 mutex_unlock(&hdr->block_mutex);
234 * page allocation for DMA (contiguous version)
236 static struct snd_util_memblk *
237 snd_trident_alloc_cont_pages(struct snd_trident *trident,
238 struct snd_pcm_substream *substream)
240 struct snd_util_memhdr *hdr;
241 struct snd_util_memblk *blk;
243 struct snd_pcm_runtime *runtime = substream->runtime;
247 if (snd_BUG_ON(runtime->dma_bytes <= 0 ||
248 runtime->dma_bytes > SNDRV_TRIDENT_MAX_PAGES *
249 SNDRV_TRIDENT_PAGE_SIZE))
251 hdr = trident->tlb.memhdr;
252 if (snd_BUG_ON(!hdr))
255 mutex_lock(&hdr->block_mutex);
256 blk = search_empty(hdr, runtime->dma_bytes);
258 mutex_unlock(&hdr->block_mutex);
262 /* set TLB entries */
263 addr = runtime->dma_addr;
264 ptr = (unsigned long)runtime->dma_area;
265 for (page = firstpg(blk); page <= lastpg(blk); page++,
266 ptr += SNDRV_TRIDENT_PAGE_SIZE, addr += SNDRV_TRIDENT_PAGE_SIZE) {
267 if (! is_valid_page(addr)) {
268 __snd_util_mem_free(hdr, blk);
269 mutex_unlock(&hdr->block_mutex);
272 set_tlb_bus(trident, page, ptr, addr);
274 mutex_unlock(&hdr->block_mutex);
279 * page allocation for DMA
281 struct snd_util_memblk *
282 snd_trident_alloc_pages(struct snd_trident *trident,
283 struct snd_pcm_substream *substream)
285 if (snd_BUG_ON(!trident || !substream))
287 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_SG)
288 return snd_trident_alloc_sg_pages(trident, substream);
290 return snd_trident_alloc_cont_pages(trident, substream);
295 * release DMA buffer from page table
297 int snd_trident_free_pages(struct snd_trident *trident,
298 struct snd_util_memblk *blk)
300 struct snd_util_memhdr *hdr;
303 if (snd_BUG_ON(!trident || !blk))
306 hdr = trident->tlb.memhdr;
307 mutex_lock(&hdr->block_mutex);
308 /* reset TLB entries */
309 for (page = firstpg(blk); page <= lastpg(blk); page++)
310 set_silent_tlb(trident, page);
311 /* free memory block */
312 __snd_util_mem_free(hdr, blk);
313 mutex_unlock(&hdr->block_mutex);