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