Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| 3 | * Copyright (c) by Takashi Iwai <tiwai@suse.de> |
| 4 | * |
| 5 | * EMU10K1 memory page allocation (PTB area) |
| 6 | * |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <sound/driver.h> |
| 25 | #include <linux/pci.h> |
| 26 | #include <linux/time.h> |
| 27 | #include <sound/core.h> |
| 28 | #include <sound/emu10k1.h> |
| 29 | |
| 30 | /* page arguments of these two macros are Emu page (4096 bytes), not like |
| 31 | * aligned pages in others |
| 32 | */ |
| 33 | #define __set_ptb_entry(emu,page,addr) \ |
| 34 | (((u32 *)(emu)->ptb_pages.area)[page] = cpu_to_le32(((addr) << 1) | (page))) |
| 35 | |
| 36 | #define UNIT_PAGES (PAGE_SIZE / EMUPAGESIZE) |
| 37 | #define MAX_ALIGN_PAGES (MAXPAGES / UNIT_PAGES) |
| 38 | /* get aligned page from offset address */ |
| 39 | #define get_aligned_page(offset) ((offset) >> PAGE_SHIFT) |
| 40 | /* get offset address from aligned page */ |
| 41 | #define aligned_page_offset(page) ((page) << PAGE_SHIFT) |
| 42 | |
| 43 | #if PAGE_SIZE == 4096 |
| 44 | /* page size == EMUPAGESIZE */ |
| 45 | /* fill PTB entrie(s) corresponding to page with addr */ |
| 46 | #define set_ptb_entry(emu,page,addr) __set_ptb_entry(emu,page,addr) |
| 47 | /* fill PTB entrie(s) corresponding to page with silence pointer */ |
| 48 | #define set_silent_ptb(emu,page) __set_ptb_entry(emu,page,emu->silent_page.addr) |
| 49 | #else |
| 50 | /* fill PTB entries -- we need to fill UNIT_PAGES entries */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 51 | static inline void set_ptb_entry(struct snd_emu10k1 *emu, int page, dma_addr_t addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | { |
| 53 | int i; |
| 54 | page *= UNIT_PAGES; |
| 55 | for (i = 0; i < UNIT_PAGES; i++, page++) { |
| 56 | __set_ptb_entry(emu, page, addr); |
| 57 | addr += EMUPAGESIZE; |
| 58 | } |
| 59 | } |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 60 | static inline void set_silent_ptb(struct snd_emu10k1 *emu, int page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | { |
| 62 | int i; |
| 63 | page *= UNIT_PAGES; |
| 64 | for (i = 0; i < UNIT_PAGES; i++, page++) |
| 65 | /* do not increment ptr */ |
| 66 | __set_ptb_entry(emu, page, emu->silent_page.addr); |
| 67 | } |
| 68 | #endif /* PAGE_SIZE */ |
| 69 | |
| 70 | |
| 71 | /* |
| 72 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 73 | static int synth_alloc_pages(struct snd_emu10k1 *hw, struct snd_emu10k1_memblk *blk); |
| 74 | static int synth_free_pages(struct snd_emu10k1 *hw, struct snd_emu10k1_memblk *blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 76 | #define get_emu10k1_memblk(l,member) list_entry(l, struct snd_emu10k1_memblk, member) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | |
| 79 | /* initialize emu10k1 part */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 80 | static void emu10k1_memblk_init(struct snd_emu10k1_memblk *blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { |
| 82 | blk->mapped_page = -1; |
| 83 | INIT_LIST_HEAD(&blk->mapped_link); |
| 84 | INIT_LIST_HEAD(&blk->mapped_order_link); |
| 85 | blk->map_locked = 0; |
| 86 | |
| 87 | blk->first_page = get_aligned_page(blk->mem.offset); |
| 88 | blk->last_page = get_aligned_page(blk->mem.offset + blk->mem.size - 1); |
| 89 | blk->pages = blk->last_page - blk->first_page + 1; |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * search empty region on PTB with the given size |
| 94 | * |
| 95 | * if an empty region is found, return the page and store the next mapped block |
| 96 | * in nextp |
| 97 | * if not found, return a negative error code. |
| 98 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 99 | static int search_empty_map_area(struct snd_emu10k1 *emu, int npages, struct list_head **nextp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | { |
| 101 | int page = 0, found_page = -ENOMEM; |
| 102 | int max_size = npages; |
| 103 | int size; |
| 104 | struct list_head *candidate = &emu->mapped_link_head; |
| 105 | struct list_head *pos; |
| 106 | |
| 107 | list_for_each (pos, &emu->mapped_link_head) { |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 108 | struct snd_emu10k1_memblk *blk = get_emu10k1_memblk(pos, mapped_link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | snd_assert(blk->mapped_page >= 0, continue); |
| 110 | size = blk->mapped_page - page; |
| 111 | if (size == npages) { |
| 112 | *nextp = pos; |
| 113 | return page; |
| 114 | } |
| 115 | else if (size > max_size) { |
| 116 | /* we look for the maximum empty hole */ |
| 117 | max_size = size; |
| 118 | candidate = pos; |
| 119 | found_page = page; |
| 120 | } |
| 121 | page = blk->mapped_page + blk->pages; |
| 122 | } |
| 123 | size = MAX_ALIGN_PAGES - page; |
| 124 | if (size >= max_size) { |
| 125 | *nextp = pos; |
| 126 | return page; |
| 127 | } |
| 128 | *nextp = candidate; |
| 129 | return found_page; |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * map a memory block onto emu10k1's PTB |
| 134 | * |
| 135 | * call with memblk_lock held |
| 136 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 137 | static int map_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
| 139 | int page, pg; |
| 140 | struct list_head *next; |
| 141 | |
| 142 | page = search_empty_map_area(emu, blk->pages, &next); |
| 143 | if (page < 0) /* not found */ |
| 144 | return page; |
| 145 | /* insert this block in the proper position of mapped list */ |
| 146 | list_add_tail(&blk->mapped_link, next); |
| 147 | /* append this as a newest block in order list */ |
| 148 | list_add_tail(&blk->mapped_order_link, &emu->mapped_order_link_head); |
| 149 | blk->mapped_page = page; |
| 150 | /* fill PTB */ |
| 151 | for (pg = blk->first_page; pg <= blk->last_page; pg++) { |
| 152 | set_ptb_entry(emu, page, emu->page_addr_table[pg]); |
| 153 | page++; |
| 154 | } |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | /* |
| 159 | * unmap the block |
| 160 | * return the size of resultant empty pages |
| 161 | * |
| 162 | * call with memblk_lock held |
| 163 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 164 | static int unmap_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | { |
| 166 | int start_page, end_page, mpage, pg; |
| 167 | struct list_head *p; |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 168 | struct snd_emu10k1_memblk *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | /* calculate the expected size of empty region */ |
| 171 | if ((p = blk->mapped_link.prev) != &emu->mapped_link_head) { |
| 172 | q = get_emu10k1_memblk(p, mapped_link); |
| 173 | start_page = q->mapped_page + q->pages; |
| 174 | } else |
| 175 | start_page = 0; |
| 176 | if ((p = blk->mapped_link.next) != &emu->mapped_link_head) { |
| 177 | q = get_emu10k1_memblk(p, mapped_link); |
| 178 | end_page = q->mapped_page; |
| 179 | } else |
| 180 | end_page = MAX_ALIGN_PAGES; |
| 181 | |
| 182 | /* remove links */ |
| 183 | list_del(&blk->mapped_link); |
| 184 | list_del(&blk->mapped_order_link); |
| 185 | /* clear PTB */ |
| 186 | mpage = blk->mapped_page; |
| 187 | for (pg = blk->first_page; pg <= blk->last_page; pg++) { |
| 188 | set_silent_ptb(emu, mpage); |
| 189 | mpage++; |
| 190 | } |
| 191 | blk->mapped_page = -1; |
| 192 | return end_page - start_page; /* return the new empty size */ |
| 193 | } |
| 194 | |
| 195 | /* |
| 196 | * search empty pages with the given size, and create a memory block |
| 197 | * |
| 198 | * unlike synth_alloc the memory block is aligned to the page start |
| 199 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 200 | static struct snd_emu10k1_memblk * |
| 201 | search_empty(struct snd_emu10k1 *emu, int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
| 203 | struct list_head *p; |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 204 | struct snd_emu10k1_memblk *blk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | int page, psize; |
| 206 | |
| 207 | psize = get_aligned_page(size + PAGE_SIZE -1); |
| 208 | page = 0; |
| 209 | list_for_each(p, &emu->memhdr->block) { |
| 210 | blk = get_emu10k1_memblk(p, mem.list); |
| 211 | if (page + psize <= blk->first_page) |
| 212 | goto __found_pages; |
| 213 | page = blk->last_page + 1; |
| 214 | } |
| 215 | if (page + psize > emu->max_cache_pages) |
| 216 | return NULL; |
| 217 | |
| 218 | __found_pages: |
| 219 | /* create a new memory block */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 220 | blk = (struct snd_emu10k1_memblk *)__snd_util_memblk_new(emu->memhdr, psize << PAGE_SHIFT, p->prev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | if (blk == NULL) |
| 222 | return NULL; |
| 223 | blk->mem.offset = aligned_page_offset(page); /* set aligned offset */ |
| 224 | emu10k1_memblk_init(blk); |
| 225 | return blk; |
| 226 | } |
| 227 | |
| 228 | |
| 229 | /* |
| 230 | * check if the given pointer is valid for pages |
| 231 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 232 | static int is_valid_page(struct snd_emu10k1 *emu, dma_addr_t addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | { |
| 234 | if (addr & ~emu->dma_mask) { |
Takashi Iwai | 99b359b | 2005-10-20 18:26:44 +0200 | [diff] [blame] | 235 | snd_printk(KERN_ERR "max memory size is 0x%lx (addr = 0x%lx)!!\n", emu->dma_mask, (unsigned long)addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | return 0; |
| 237 | } |
| 238 | if (addr & (EMUPAGESIZE-1)) { |
Takashi Iwai | 99b359b | 2005-10-20 18:26:44 +0200 | [diff] [blame] | 239 | snd_printk(KERN_ERR "page is not aligned\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | return 0; |
| 241 | } |
| 242 | return 1; |
| 243 | } |
| 244 | |
| 245 | /* |
| 246 | * map the given memory block on PTB. |
| 247 | * if the block is already mapped, update the link order. |
| 248 | * if no empty pages are found, tries to release unsed memory blocks |
| 249 | * and retry the mapping. |
| 250 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 251 | int snd_emu10k1_memblk_map(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
| 253 | int err; |
| 254 | int size; |
| 255 | struct list_head *p, *nextp; |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 256 | struct snd_emu10k1_memblk *deleted; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | unsigned long flags; |
| 258 | |
| 259 | spin_lock_irqsave(&emu->memblk_lock, flags); |
| 260 | if (blk->mapped_page >= 0) { |
| 261 | /* update order link */ |
| 262 | list_del(&blk->mapped_order_link); |
| 263 | list_add_tail(&blk->mapped_order_link, &emu->mapped_order_link_head); |
| 264 | spin_unlock_irqrestore(&emu->memblk_lock, flags); |
| 265 | return 0; |
| 266 | } |
| 267 | if ((err = map_memblk(emu, blk)) < 0) { |
| 268 | /* no enough page - try to unmap some blocks */ |
| 269 | /* starting from the oldest block */ |
| 270 | p = emu->mapped_order_link_head.next; |
| 271 | for (; p != &emu->mapped_order_link_head; p = nextp) { |
| 272 | nextp = p->next; |
| 273 | deleted = get_emu10k1_memblk(p, mapped_order_link); |
| 274 | if (deleted->map_locked) |
| 275 | continue; |
| 276 | size = unmap_memblk(emu, deleted); |
| 277 | if (size >= blk->pages) { |
| 278 | /* ok the empty region is enough large */ |
| 279 | err = map_memblk(emu, blk); |
| 280 | break; |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | spin_unlock_irqrestore(&emu->memblk_lock, flags); |
| 285 | return err; |
| 286 | } |
| 287 | |
| 288 | /* |
| 289 | * page allocation for DMA |
| 290 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 291 | struct snd_util_memblk * |
| 292 | snd_emu10k1_alloc_pages(struct snd_emu10k1 *emu, struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | { |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 294 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream); |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 296 | struct snd_util_memhdr *hdr; |
| 297 | struct snd_emu10k1_memblk *blk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | int page, err, idx; |
| 299 | |
| 300 | snd_assert(emu, return NULL); |
| 301 | snd_assert(runtime->dma_bytes > 0 && runtime->dma_bytes < MAXPAGES * EMUPAGESIZE, return NULL); |
| 302 | hdr = emu->memhdr; |
| 303 | snd_assert(hdr, return NULL); |
| 304 | |
| 305 | down(&hdr->block_mutex); |
| 306 | blk = search_empty(emu, runtime->dma_bytes); |
| 307 | if (blk == NULL) { |
| 308 | up(&hdr->block_mutex); |
| 309 | return NULL; |
| 310 | } |
| 311 | /* fill buffer addresses but pointers are not stored so that |
| 312 | * snd_free_pci_page() is not called in in synth_free() |
| 313 | */ |
| 314 | idx = 0; |
| 315 | for (page = blk->first_page; page <= blk->last_page; page++, idx++) { |
| 316 | dma_addr_t addr; |
| 317 | #ifdef CONFIG_SND_DEBUG |
| 318 | if (idx >= sgbuf->pages) { |
| 319 | printk(KERN_ERR "emu: pages overflow! (%d-%d) for %d\n", |
| 320 | blk->first_page, blk->last_page, sgbuf->pages); |
| 321 | up(&hdr->block_mutex); |
| 322 | return NULL; |
| 323 | } |
| 324 | #endif |
| 325 | addr = sgbuf->table[idx].addr; |
| 326 | if (! is_valid_page(emu, addr)) { |
| 327 | printk(KERN_ERR "emu: failure page = %d\n", idx); |
| 328 | up(&hdr->block_mutex); |
| 329 | return NULL; |
| 330 | } |
| 331 | emu->page_addr_table[page] = addr; |
| 332 | emu->page_ptr_table[page] = NULL; |
| 333 | } |
| 334 | |
| 335 | /* set PTB entries */ |
| 336 | blk->map_locked = 1; /* do not unmap this block! */ |
| 337 | err = snd_emu10k1_memblk_map(emu, blk); |
| 338 | if (err < 0) { |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 339 | __snd_util_mem_free(hdr, (struct snd_util_memblk *)blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | up(&hdr->block_mutex); |
| 341 | return NULL; |
| 342 | } |
| 343 | up(&hdr->block_mutex); |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 344 | return (struct snd_util_memblk *)blk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | |
| 348 | /* |
| 349 | * release DMA buffer from page table |
| 350 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 351 | int snd_emu10k1_free_pages(struct snd_emu10k1 *emu, struct snd_util_memblk *blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | { |
| 353 | snd_assert(emu && blk, return -EINVAL); |
| 354 | return snd_emu10k1_synth_free(emu, blk); |
| 355 | } |
| 356 | |
| 357 | |
| 358 | /* |
| 359 | * memory allocation using multiple pages (for synth) |
| 360 | * Unlike the DMA allocation above, non-contiguous pages are assined. |
| 361 | */ |
| 362 | |
| 363 | /* |
| 364 | * allocate a synth sample area |
| 365 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 366 | struct snd_util_memblk * |
| 367 | snd_emu10k1_synth_alloc(struct snd_emu10k1 *hw, unsigned int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | { |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 369 | struct snd_emu10k1_memblk *blk; |
| 370 | struct snd_util_memhdr *hdr = hw->memhdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
| 372 | down(&hdr->block_mutex); |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 373 | blk = (struct snd_emu10k1_memblk *)__snd_util_mem_alloc(hdr, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | if (blk == NULL) { |
| 375 | up(&hdr->block_mutex); |
| 376 | return NULL; |
| 377 | } |
| 378 | if (synth_alloc_pages(hw, blk)) { |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 379 | __snd_util_mem_free(hdr, (struct snd_util_memblk *)blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | up(&hdr->block_mutex); |
| 381 | return NULL; |
| 382 | } |
| 383 | snd_emu10k1_memblk_map(hw, blk); |
| 384 | up(&hdr->block_mutex); |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 385 | return (struct snd_util_memblk *)blk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | |
| 389 | /* |
| 390 | * free a synth sample area |
| 391 | */ |
| 392 | int |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 393 | snd_emu10k1_synth_free(struct snd_emu10k1 *emu, struct snd_util_memblk *memblk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 395 | struct snd_util_memhdr *hdr = emu->memhdr; |
| 396 | struct snd_emu10k1_memblk *blk = (struct snd_emu10k1_memblk *)memblk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | unsigned long flags; |
| 398 | |
| 399 | down(&hdr->block_mutex); |
| 400 | spin_lock_irqsave(&emu->memblk_lock, flags); |
| 401 | if (blk->mapped_page >= 0) |
| 402 | unmap_memblk(emu, blk); |
| 403 | spin_unlock_irqrestore(&emu->memblk_lock, flags); |
| 404 | synth_free_pages(emu, blk); |
| 405 | __snd_util_mem_free(hdr, memblk); |
| 406 | up(&hdr->block_mutex); |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | |
| 411 | /* check new allocation range */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 412 | static void get_single_page_range(struct snd_util_memhdr *hdr, |
| 413 | struct snd_emu10k1_memblk *blk, |
| 414 | int *first_page_ret, int *last_page_ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | { |
| 416 | struct list_head *p; |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 417 | struct snd_emu10k1_memblk *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | int first_page, last_page; |
| 419 | first_page = blk->first_page; |
| 420 | if ((p = blk->mem.list.prev) != &hdr->block) { |
| 421 | q = get_emu10k1_memblk(p, mem.list); |
| 422 | if (q->last_page == first_page) |
| 423 | first_page++; /* first page was already allocated */ |
| 424 | } |
| 425 | last_page = blk->last_page; |
| 426 | if ((p = blk->mem.list.next) != &hdr->block) { |
| 427 | q = get_emu10k1_memblk(p, mem.list); |
| 428 | if (q->first_page == last_page) |
| 429 | last_page--; /* last page was already allocated */ |
| 430 | } |
| 431 | *first_page_ret = first_page; |
| 432 | *last_page_ret = last_page; |
| 433 | } |
| 434 | |
| 435 | /* |
| 436 | * allocate kernel pages |
| 437 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 438 | static int synth_alloc_pages(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | { |
| 440 | int page, first_page, last_page; |
| 441 | struct snd_dma_buffer dmab; |
| 442 | |
| 443 | emu10k1_memblk_init(blk); |
| 444 | get_single_page_range(emu->memhdr, blk, &first_page, &last_page); |
| 445 | /* allocate kernel pages */ |
| 446 | for (page = first_page; page <= last_page; page++) { |
| 447 | if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(emu->pci), |
| 448 | PAGE_SIZE, &dmab) < 0) |
| 449 | goto __fail; |
| 450 | if (! is_valid_page(emu, dmab.addr)) { |
| 451 | snd_dma_free_pages(&dmab); |
| 452 | goto __fail; |
| 453 | } |
| 454 | emu->page_addr_table[page] = dmab.addr; |
| 455 | emu->page_ptr_table[page] = dmab.area; |
| 456 | } |
| 457 | return 0; |
| 458 | |
| 459 | __fail: |
| 460 | /* release allocated pages */ |
| 461 | last_page = page - 1; |
| 462 | for (page = first_page; page <= last_page; page++) { |
| 463 | dmab.area = emu->page_ptr_table[page]; |
| 464 | dmab.addr = emu->page_addr_table[page]; |
| 465 | dmab.bytes = PAGE_SIZE; |
| 466 | snd_dma_free_pages(&dmab); |
| 467 | emu->page_addr_table[page] = 0; |
| 468 | emu->page_ptr_table[page] = NULL; |
| 469 | } |
| 470 | |
| 471 | return -ENOMEM; |
| 472 | } |
| 473 | |
| 474 | /* |
| 475 | * free pages |
| 476 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 477 | static int synth_free_pages(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | { |
| 479 | int page, first_page, last_page; |
| 480 | struct snd_dma_buffer dmab; |
| 481 | |
| 482 | get_single_page_range(emu->memhdr, blk, &first_page, &last_page); |
| 483 | dmab.dev.type = SNDRV_DMA_TYPE_DEV; |
| 484 | dmab.dev.dev = snd_dma_pci_data(emu->pci); |
| 485 | for (page = first_page; page <= last_page; page++) { |
| 486 | if (emu->page_ptr_table[page] == NULL) |
| 487 | continue; |
| 488 | dmab.area = emu->page_ptr_table[page]; |
| 489 | dmab.addr = emu->page_addr_table[page]; |
| 490 | dmab.bytes = PAGE_SIZE; |
| 491 | snd_dma_free_pages(&dmab); |
| 492 | emu->page_addr_table[page] = 0; |
| 493 | emu->page_ptr_table[page] = NULL; |
| 494 | } |
| 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | /* calculate buffer pointer from offset address */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 500 | static inline void *offset_ptr(struct snd_emu10k1 *emu, int page, int offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | { |
| 502 | char *ptr; |
| 503 | snd_assert(page >= 0 && page < emu->max_cache_pages, return NULL); |
| 504 | ptr = emu->page_ptr_table[page]; |
| 505 | if (! ptr) { |
Takashi Iwai | 99b359b | 2005-10-20 18:26:44 +0200 | [diff] [blame] | 506 | printk(KERN_ERR "emu10k1: access to NULL ptr: page = %d\n", page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | return NULL; |
| 508 | } |
| 509 | ptr += offset & (PAGE_SIZE - 1); |
| 510 | return (void*)ptr; |
| 511 | } |
| 512 | |
| 513 | /* |
| 514 | * bzero(blk + offset, size) |
| 515 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 516 | int snd_emu10k1_synth_bzero(struct snd_emu10k1 *emu, struct snd_util_memblk *blk, |
| 517 | int offset, int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | { |
| 519 | int page, nextofs, end_offset, temp, temp1; |
| 520 | void *ptr; |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 521 | struct snd_emu10k1_memblk *p = (struct snd_emu10k1_memblk *)blk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
| 523 | offset += blk->offset & (PAGE_SIZE - 1); |
| 524 | end_offset = offset + size; |
| 525 | page = get_aligned_page(offset); |
| 526 | do { |
| 527 | nextofs = aligned_page_offset(page + 1); |
| 528 | temp = nextofs - offset; |
| 529 | temp1 = end_offset - offset; |
| 530 | if (temp1 < temp) |
| 531 | temp = temp1; |
| 532 | ptr = offset_ptr(emu, page + p->first_page, offset); |
| 533 | if (ptr) |
| 534 | memset(ptr, 0, temp); |
| 535 | offset = nextofs; |
| 536 | page++; |
| 537 | } while (offset < end_offset); |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * copy_from_user(blk + offset, data, size) |
| 543 | */ |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 544 | int snd_emu10k1_synth_copy_from_user(struct snd_emu10k1 *emu, struct snd_util_memblk *blk, |
| 545 | int offset, const char __user *data, int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | { |
| 547 | int page, nextofs, end_offset, temp, temp1; |
| 548 | void *ptr; |
Takashi Iwai | eb4698f | 2005-11-17 14:50:13 +0100 | [diff] [blame^] | 549 | struct snd_emu10k1_memblk *p = (struct snd_emu10k1_memblk *)blk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
| 551 | offset += blk->offset & (PAGE_SIZE - 1); |
| 552 | end_offset = offset + size; |
| 553 | page = get_aligned_page(offset); |
| 554 | do { |
| 555 | nextofs = aligned_page_offset(page + 1); |
| 556 | temp = nextofs - offset; |
| 557 | temp1 = end_offset - offset; |
| 558 | if (temp1 < temp) |
| 559 | temp = temp1; |
| 560 | ptr = offset_ptr(emu, page + p->first_page, offset); |
| 561 | if (ptr && copy_from_user(ptr, data, temp)) |
| 562 | return -EFAULT; |
| 563 | offset = nextofs; |
| 564 | data += temp; |
| 565 | page++; |
| 566 | } while (offset < end_offset); |
| 567 | return 0; |
| 568 | } |