sound/pci/trident/trident_memory.c

   1 /*
   2  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   3  *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
   4  *  Copyright (c) by Scott McNab <sdm@fractalgraphics.com.au>
   5  *
   6  *  Trident 4DWave-NX memory page allocation (TLB area)
   7  *  Trident chip can handle only 16MByte of the memory at the same time.
   8  *
   9  *
  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.
  14  *
  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.
  19  *
  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
  23  *
  24  */
  25
  26 #include <sound/driver.h>
  27 #include <asm/io.h>
  28 #include <linux/pci.h>
  29 #include <linux/time.h>
  30 #include <sound/core.h>
  31 #include <sound/trident.h>
  32
  33 /* page arguments of these two macros are Trident page (4096 bytes), not like
  34  * aligned pages in others
  35  */
  36 #define __set_tlb_bus(trident,page,ptr,addr) \
  37         do { (trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1)); \
  38              (trident)->tlb.shadow_entries[page] = (ptr); } while (0)
  39 #define __tlb_to_ptr(trident,page) \
  40         (void*)((trident)->tlb.shadow_entries[page])
  41 #define __tlb_to_addr(trident,page) \
  42         (dma_addr_t)le32_to_cpu((trident->tlb.entries[page]) & ~(SNDRV_TRIDENT_PAGE_SIZE - 1))
  43
  44 #if PAGE_SIZE == 4096
  45 /* page size == SNDRV_TRIDENT_PAGE_SIZE */
  46 #define ALIGN_PAGE_SIZE         PAGE_SIZE       /* minimum page size for allocation */
  47 #define MAX_ALIGN_PAGES         SNDRV_TRIDENT_MAX_PAGES /* maxmium aligned pages */
  48 /* fill TLB entrie(s) corresponding to page with ptr */
  49 #define set_tlb_bus(trident,page,ptr,addr) __set_tlb_bus(trident,page,ptr,addr)
  50 /* fill TLB entrie(s) corresponding to page with silence pointer */
  51 #define set_silent_tlb(trident,page)    __set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr)
  52 /* get aligned page from offset address */
  53 #define get_aligned_page(offset)        ((offset) >> 12)
  54 /* get offset address from aligned page */
  55 #define aligned_page_offset(page)       ((page) << 12)
  56 /* get buffer address from aligned page */
  57 #define page_to_ptr(trident,page)       __tlb_to_ptr(trident, page)
  58 /* get PCI physical address from aligned page */
  59 #define page_to_addr(trident,page)      __tlb_to_addr(trident, page)
  60
  61 #elif PAGE_SIZE == 8192
  62 /* page size == SNDRV_TRIDENT_PAGE_SIZE x 2*/
  63 #define ALIGN_PAGE_SIZE         PAGE_SIZE
  64 #define MAX_ALIGN_PAGES         (SNDRV_TRIDENT_MAX_PAGES / 2)
  65 #define get_aligned_page(offset)        ((offset) >> 13)
  66 #define aligned_page_offset(page)       ((page) << 13)
  67 #define page_to_ptr(trident,page)       __tlb_to_ptr(trident, (page) << 1)
  68 #define page_to_addr(trident,page)      __tlb_to_addr(trident, (page) << 1)
  69
  70 /* fill TLB entries -- we need to fill two entries */
  71 static inline void set_tlb_bus(struct snd_trident *trident, int page,
  72                                unsigned long ptr, dma_addr_t addr)
  73 {
  74         page <<= 1;
  75         __set_tlb_bus(trident, page, ptr, addr);
  76         __set_tlb_bus(trident, page+1, ptr + SNDRV_TRIDENT_PAGE_SIZE, addr + SNDRV_TRIDENT_PAGE_SIZE);
  77 }
  78 static inline void set_silent_tlb(struct snd_trident *trident, int page)
  79 {
  80         page <<= 1;
  81         __set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
  82         __set_tlb_bus(trident, page+1, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
  83 }
  84
  85 #else
  86 /* arbitrary size */
  87 #define UNIT_PAGES              (PAGE_SIZE / SNDRV_TRIDENT_PAGE_SIZE)
  88 #define ALIGN_PAGE_SIZE         (SNDRV_TRIDENT_PAGE_SIZE * UNIT_PAGES)
  89 #define MAX_ALIGN_PAGES         (SNDRV_TRIDENT_MAX_PAGES / UNIT_PAGES)
  90 /* Note: if alignment doesn't match to the maximum size, the last few blocks
  91  * become unusable.  To use such blocks, you'll need to check the validity
  92  * of accessing page in set_tlb_bus and set_silent_tlb.  search_empty()
  93  * should also check it, too.
  94  */
  95 #define get_aligned_page(offset)        ((offset) / ALIGN_PAGE_SIZE)
  96 #define aligned_page_offset(page)       ((page) * ALIGN_PAGE_SIZE)
  97 #define page_to_ptr(trident,page)       __tlb_to_ptr(trident, (page) * UNIT_PAGES)
  98 #define page_to_addr(trident,page)      __tlb_to_addr(trident, (page) * UNIT_PAGES)
  99
 100 /* fill TLB entries -- UNIT_PAGES entries must be filled */
 101 static inline void set_tlb_bus(struct snd_trident *trident, int page,
 102                                unsigned long ptr, dma_addr_t addr)
 103 {
 104         int i;
 105         page *= UNIT_PAGES;
 106         for (i = 0; i < UNIT_PAGES; i++, page++) {
 107                 __set_tlb_bus(trident, page, ptr, addr);
 108                 ptr += SNDRV_TRIDENT_PAGE_SIZE;
 109                 addr += SNDRV_TRIDENT_PAGE_SIZE;
 110         }
 111 }
 112 static inline void set_silent_tlb(struct snd_trident *trident, int page)
 113 {
 114         int i;
 115         page *= UNIT_PAGES;
 116         for (i = 0; i < UNIT_PAGES; i++, page++)
 117                 __set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
 118 }
 119
 120 #endif /* PAGE_SIZE */
 121
 122 /* calculate buffer pointer from offset address */
 123 static inline void *offset_ptr(struct snd_trident *trident, int offset)
 124 {
 125         char *ptr;
 126         ptr = page_to_ptr(trident, get_aligned_page(offset));
 127         ptr += offset % ALIGN_PAGE_SIZE;
 128         return (void*)ptr;
 129 }
 130
 131 /* first and last (aligned) pages of memory block */
 132 #define firstpg(blk)    (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->first_page)
 133 #define lastpg(blk)     (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->last_page)
 134
 135 /*
 136  * search empty pages which may contain given size
 137  */
 138 static struct snd_util_memblk *
 139 search_empty(struct snd_util_memhdr *hdr, int size)
 140 {
 141         struct snd_util_memblk *blk, *prev;
 142         int page, psize;
 143         struct list_head *p;
 144
 145         psize = get_aligned_page(size + ALIGN_PAGE_SIZE -1);
 146         prev = NULL;
 147         page = 0;
 148         list_for_each(p, &hdr->block) {
 149                 blk = list_entry(p, struct snd_util_memblk, list);
 150                 if (page + psize <= firstpg(blk))
 151                         goto __found_pages;
 152                 page = lastpg(blk) + 1;
 153         }
 154         if (page + psize > MAX_ALIGN_PAGES)
 155                 return NULL;
 156
 157 __found_pages:
 158         /* create a new memory block */
 159         blk = __snd_util_memblk_new(hdr, psize * ALIGN_PAGE_SIZE, p->prev);
 160         if (blk == NULL)
 161                 return NULL;
 162         blk->offset = aligned_page_offset(page); /* set aligned offset */
 163         firstpg(blk) = page;
 164         lastpg(blk) = page + psize - 1;
 165         return blk;
 166 }
 167
 168
 169 /*
 170  * check if the given pointer is valid for pages
 171  */
 172 static int is_valid_page(unsigned long ptr)
 173 {
 174         if (ptr & ~0x3fffffffUL) {
 175                 snd_printk(KERN_ERR "max memory size is 1GB!!\n");
 176                 return 0;
 177         }
 178         if (ptr & (SNDRV_TRIDENT_PAGE_SIZE-1)) {
 179                 snd_printk(KERN_ERR "page is not aligned\n");
 180                 return 0;
 181         }
 182         return 1;
 183 }
 184
 185 /*
 186  * page allocation for DMA (Scatter-Gather version)
 187  */
 188 static struct snd_util_memblk *
 189 snd_trident_alloc_sg_pages(struct snd_trident *trident,
 190                            struct snd_pcm_substream *substream)
 191 {
 192         struct snd_util_memhdr *hdr;
 193         struct snd_util_memblk *blk;
 194         struct snd_pcm_runtime *runtime = substream->runtime;
 195         int idx, page;
 196         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 197
 198         snd_assert(runtime->dma_bytes > 0 && runtime->dma_bytes <= SNDRV_TRIDENT_MAX_PAGES * SNDRV_TRIDENT_PAGE_SIZE, return NULL);
 199         hdr = trident->tlb.memhdr;
 200         snd_assert(hdr != NULL, return NULL);
 201
 202
 203
 204         down(&hdr->block_mutex);
 205         blk = search_empty(hdr, runtime->dma_bytes);
 206         if (blk == NULL) {
 207                 up(&hdr->block_mutex);
 208                 return NULL;
 209         }
 210         if (lastpg(blk) - firstpg(blk) >= sgbuf->pages) {
 211                 snd_printk(KERN_ERR "page calculation doesn't match: allocated pages = %d, trident = %d/%d\n", sgbuf->pages, firstpg(blk), lastpg(blk));
 212                 __snd_util_mem_free(hdr, blk);
 213                 up(&hdr->block_mutex);
 214                 return NULL;
 215         }
 216
 217         /* set TLB entries */
 218         idx = 0;
 219         for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) {
 220                 dma_addr_t addr = sgbuf->table[idx].addr;
 221                 unsigned long ptr = (unsigned long)sgbuf->table[idx].buf;
 222                 if (! is_valid_page(addr)) {
 223                         __snd_util_mem_free(hdr, blk);
 224                         up(&hdr->block_mutex);
 225                         return NULL;
 226                 }
 227                 set_tlb_bus(trident, page, ptr, addr);
 228         }
 229         up(&hdr->block_mutex);
 230         return blk;
 231 }
 232
 233 /*
 234  * page allocation for DMA (contiguous version)
 235  */
 236 static struct snd_util_memblk *
 237 snd_trident_alloc_cont_pages(struct snd_trident *trident,
 238                              struct snd_pcm_substream *substream)
 239 {
 240         struct snd_util_memhdr *hdr;
 241         struct snd_util_memblk *blk;
 242         int page;
 243         struct snd_pcm_runtime *runtime = substream->runtime;
 244         dma_addr_t addr;
 245         unsigned long ptr;
 246
 247         snd_assert(runtime->dma_bytes> 0 && runtime->dma_bytes <= SNDRV_TRIDENT_MAX_PAGES * SNDRV_TRIDENT_PAGE_SIZE, return NULL);
 248         hdr = trident->tlb.memhdr;
 249         snd_assert(hdr != NULL, return NULL);
 250
 251         down(&hdr->block_mutex);
 252         blk = search_empty(hdr, runtime->dma_bytes);
 253         if (blk == NULL) {
 254                 up(&hdr->block_mutex);
 255                 return NULL;
 256         }
 257
 258         /* set TLB entries */
 259         addr = runtime->dma_addr;
 260         ptr = (unsigned long)runtime->dma_area;
 261         for (page = firstpg(blk); page <= lastpg(blk); page++,
 262              ptr += SNDRV_TRIDENT_PAGE_SIZE, addr += SNDRV_TRIDENT_PAGE_SIZE) {
 263                 if (! is_valid_page(addr)) {
 264                         __snd_util_mem_free(hdr, blk);
 265                         up(&hdr->block_mutex);
 266                         return NULL;
 267                 }
 268                 set_tlb_bus(trident, page, ptr, addr);
 269         }
 270         up(&hdr->block_mutex);
 271         return blk;
 272 }
 273
 274 /*
 275  * page allocation for DMA
 276  */
 277 struct snd_util_memblk *
 278 snd_trident_alloc_pages(struct snd_trident *trident,
 279                         struct snd_pcm_substream *substream)
 280 {
 281         snd_assert(trident != NULL, return NULL);
 282         snd_assert(substream != NULL, return NULL);
 283         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_SG)
 284                 return snd_trident_alloc_sg_pages(trident, substream);
 285         else
 286                 return snd_trident_alloc_cont_pages(trident, substream);
 287 }
 288
 289
 290 /*
 291  * release DMA buffer from page table
 292  */
 293 int snd_trident_free_pages(struct snd_trident *trident,
 294                            struct snd_util_memblk *blk)
 295 {
 296         struct snd_util_memhdr *hdr;
 297         int page;
 298
 299         snd_assert(trident != NULL, return -EINVAL);
 300         snd_assert(blk != NULL, return -EINVAL);
 301
 302         hdr = trident->tlb.memhdr;
 303         down(&hdr->block_mutex);
 304         /* reset TLB entries */
 305         for (page = firstpg(blk); page <= lastpg(blk); page++)
 306                 set_silent_tlb(trident, page);
 307         /* free memory block */
 308         __snd_util_mem_free(hdr, blk);
 309         up(&hdr->block_mutex);
 310         return 0;
 311 }
 312
 313
 314 /*----------------------------------------------------------------
 315  * memory allocation using multiple pages (for synth)
 316  *----------------------------------------------------------------
 317  * Unlike the DMA allocation above, non-contiguous pages are
 318  * assigned to TLB.
 319  *----------------------------------------------------------------*/
 320
 321 /*
 322  */
 323 static int synth_alloc_pages(struct snd_trident *hw, struct snd_util_memblk *blk);
 324 static int synth_free_pages(struct snd_trident *hw, struct snd_util_memblk *blk);
 325
 326 /*
 327  * allocate a synth sample area
 328  */
 329 struct snd_util_memblk *
 330 snd_trident_synth_alloc(struct snd_trident *hw, unsigned int size)
 331 {
 332         struct snd_util_memblk *blk;
 333         struct snd_util_memhdr *hdr = hw->tlb.memhdr;
 334
 335         down(&hdr->block_mutex);
 336         blk = __snd_util_mem_alloc(hdr, size);
 337         if (blk == NULL) {
 338                 up(&hdr->block_mutex);
 339                 return NULL;
 340         }
 341         if (synth_alloc_pages(hw, blk)) {
 342                 __snd_util_mem_free(hdr, blk);
 343                 up(&hdr->block_mutex);
 344                 return NULL;
 345         }
 346         up(&hdr->block_mutex);
 347         return blk;
 348 }
 349
 350
 351 /*
 352  * free a synth sample area
 353  */
 354 int
 355 snd_trident_synth_free(struct snd_trident *hw, struct snd_util_memblk *blk)
 356 {
 357         struct snd_util_memhdr *hdr = hw->tlb.memhdr;
 358
 359         down(&hdr->block_mutex);
 360         synth_free_pages(hw, blk);
 361          __snd_util_mem_free(hdr, blk);
 362         up(&hdr->block_mutex);
 363         return 0;
 364 }
 365
 366
 367 /*
 368  * reset TLB entry and free kernel page
 369  */
 370 static void clear_tlb(struct snd_trident *trident, int page)
 371 {
 372         void *ptr = page_to_ptr(trident, page);
 373         dma_addr_t addr = page_to_addr(trident, page);
 374         set_silent_tlb(trident, page);
 375         if (ptr) {
 376                 struct snd_dma_buffer dmab;
 377                 dmab.dev.type = SNDRV_DMA_TYPE_DEV;
 378                 dmab.dev.dev = snd_dma_pci_data(trident->pci);
 379                 dmab.area = ptr;
 380                 dmab.addr = addr;
 381                 dmab.bytes = ALIGN_PAGE_SIZE;
 382                 snd_dma_free_pages(&dmab);
 383         }
 384 }
 385
 386 /* check new allocation range */
 387 static void get_single_page_range(struct snd_util_memhdr *hdr,
 388                                   struct snd_util_memblk *blk,
 389                                   int *first_page_ret, int *last_page_ret)
 390 {
 391         struct list_head *p;
 392         struct snd_util_memblk *q;
 393         int first_page, last_page;
 394         first_page = firstpg(blk);
 395         if ((p = blk->list.prev) != &hdr->block) {
 396                 q = list_entry(p, struct snd_util_memblk, list);
 397                 if (lastpg(q) == first_page)
 398                         first_page++;  /* first page was already allocated */
 399         }
 400         last_page = lastpg(blk);
 401         if ((p = blk->list.next) != &hdr->block) {
 402                 q = list_entry(p, struct snd_util_memblk, list);
 403                 if (firstpg(q) == last_page)
 404                         last_page--; /* last page was already allocated */
 405         }
 406         *first_page_ret = first_page;
 407         *last_page_ret = last_page;
 408 }
 409
 410 /*
 411  * allocate kernel pages and assign them to TLB
 412  */
 413 static int synth_alloc_pages(struct snd_trident *hw, struct snd_util_memblk *blk)
 414 {
 415         int page, first_page, last_page;
 416         struct snd_dma_buffer dmab;
 417
 418         firstpg(blk) = get_aligned_page(blk->offset);
 419         lastpg(blk) = get_aligned_page(blk->offset + blk->size - 1);
 420         get_single_page_range(hw->tlb.memhdr, blk, &first_page, &last_page);
 421
 422         /* allocate a kernel page for each Trident page -
 423          * fortunately Trident page size and kernel PAGE_SIZE is identical!
 424          */
 425         for (page = first_page; page <= last_page; page++) {
 426                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(hw->pci),
 427                                         ALIGN_PAGE_SIZE, &dmab) < 0)
 428                         goto __fail;
 429                 if (! is_valid_page(dmab.addr)) {
 430                         snd_dma_free_pages(&dmab);
 431                         goto __fail;
 432                 }
 433                 set_tlb_bus(hw, page, (unsigned long)dmab.area, dmab.addr);
 434         }
 435         return 0;
 436
 437 __fail:
 438         /* release allocated pages */
 439         last_page = page - 1;
 440         for (page = first_page; page <= last_page; page++)
 441                 clear_tlb(hw, page);
 442
 443         return -ENOMEM;
 444 }
 445
 446 /*
 447  * free pages
 448  */
 449 static int synth_free_pages(struct snd_trident *trident, struct snd_util_memblk *blk)
 450 {
 451         int page, first_page, last_page;
 452
 453         get_single_page_range(trident->tlb.memhdr, blk, &first_page, &last_page);
 454         for (page = first_page; page <= last_page; page++)
 455                 clear_tlb(trident, page);
 456
 457         return 0;
 458 }
 459
 460 /*
 461  * copy_from_user(blk + offset, data, size)
 462  */
 463 int snd_trident_synth_copy_from_user(struct snd_trident *trident,
 464                                      struct snd_util_memblk *blk,
 465                                      int offset, const char __user *data, int size)
 466 {
 467         int page, nextofs, end_offset, temp, temp1;
 468
 469         offset += blk->offset;
 470         end_offset = offset + size;
 471         page = get_aligned_page(offset) + 1;
 472         do {
 473                 nextofs = aligned_page_offset(page);
 474                 temp = nextofs - offset;
 475                 temp1 = end_offset - offset;
 476                 if (temp1 < temp)
 477                         temp = temp1;
 478                 if (copy_from_user(offset_ptr(trident, offset), data, temp))
 479                         return -EFAULT;
 480                 offset = nextofs;
 481                 data += temp;
 482                 page++;
 483         } while (offset < end_offset);
 484         return 0;
 485 }
 486