git.oblomov.eu Git - linux-2.6/blob - sound/isa/gus/gus_mem.c

   1 /*
   2  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   3  *  GUS's memory allocation routines / bottom layer
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <sound/driver.h>
  23 #include <linux/slab.h>
  24 #include <linux/string.h>
  25 #include <sound/core.h>
  26 #include <sound/gus.h>
  27 #include <sound/info.h>
  28
  29 #ifdef CONFIG_SND_DEBUG
  30 static void snd_gf1_mem_info_read(struct snd_info_entry *entry,
  31                                   struct snd_info_buffer *buffer);
  32 #endif
  33
  34 void snd_gf1_mem_lock(struct snd_gf1_mem * alloc, int xup)
  35 {
  36         if (!xup) {
  37                 mutex_lock(&alloc->memory_mutex);
  38         } else {
  39                 mutex_unlock(&alloc->memory_mutex);
  40         }
  41 }
  42
  43 static struct snd_gf1_mem_block *snd_gf1_mem_xalloc(struct snd_gf1_mem * alloc,
  44                                                struct snd_gf1_mem_block * block)
  45 {
  46         struct snd_gf1_mem_block *pblock, *nblock;
  47
  48         nblock = kmalloc(sizeof(struct snd_gf1_mem_block), GFP_KERNEL);
  49         if (nblock == NULL)
  50                 return NULL;
  51         *nblock = *block;
  52         pblock = alloc->first;
  53         while (pblock) {
  54                 if (pblock->ptr > nblock->ptr) {
  55                         nblock->prev = pblock->prev;
  56                         nblock->next = pblock;
  57                         pblock->prev = nblock;
  58                         if (pblock == alloc->first)
  59                                 alloc->first = nblock;
  60                         else
  61                                 nblock->prev->next = nblock;
  62                         mutex_unlock(&alloc->memory_mutex);
  63                         return NULL;
  64                 }
  65                 pblock = pblock->next;
  66         }
  67         nblock->next = NULL;
  68         if (alloc->last == NULL) {
  69                 nblock->prev = NULL;
  70                 alloc->first = alloc->last = nblock;
  71         } else {
  72                 nblock->prev = alloc->last;
  73                 alloc->last->next = nblock;
  74                 alloc->last = nblock;
  75         }
  76         return nblock;
  77 }
  78
  79 int snd_gf1_mem_xfree(struct snd_gf1_mem * alloc, struct snd_gf1_mem_block * block)
  80 {
  81         if (block->share) {     /* ok.. shared block */
  82                 block->share--;
  83                 mutex_unlock(&alloc->memory_mutex);
  84                 return 0;
  85         }
  86         if (alloc->first == block) {
  87                 alloc->first = block->next;
  88                 if (block->next)
  89                         block->next->prev = NULL;
  90         } else {
  91                 block->prev->next = block->next;
  92                 if (block->next)
  93                         block->next->prev = block->prev;
  94         }
  95         if (alloc->last == block) {
  96                 alloc->last = block->prev;
  97                 if (block->prev)
  98                         block->prev->next = NULL;
  99         } else {
 100                 block->next->prev = block->prev;
 101                 if (block->prev)
 102                         block->prev->next = block->next;
 103         }
 104         kfree(block->name);
 105         kfree(block);
 106         return 0;
 107 }
 108
 109 static struct snd_gf1_mem_block *snd_gf1_mem_look(struct snd_gf1_mem * alloc,
 110                                              unsigned int address)
 111 {
 112         struct snd_gf1_mem_block *block;
 113
 114         for (block = alloc->first; block; block = block->next) {
 115                 if (block->ptr == address) {
 116                         return block;
 117                 }
 118         }
 119         return NULL;
 120 }
 121
 122 static struct snd_gf1_mem_block *snd_gf1_mem_share(struct snd_gf1_mem * alloc,
 123                                               unsigned int *share_id)
 124 {
 125         struct snd_gf1_mem_block *block;
 126
 127         if (!share_id[0] && !share_id[1] &&
 128             !share_id[2] && !share_id[3])
 129                 return NULL;
 130         for (block = alloc->first; block; block = block->next)
 131                 if (!memcmp(share_id, block->share_id, sizeof(share_id)))
 132                         return block;
 133         return NULL;
 134 }
 135
 136 static int snd_gf1_mem_find(struct snd_gf1_mem * alloc,
 137                             struct snd_gf1_mem_block * block,
 138                             unsigned int size, int w_16, int align)
 139 {
 140         struct snd_gf1_bank_info *info = w_16 ? alloc->banks_16 : alloc->banks_8;
 141         unsigned int idx, boundary;
 142         int size1;
 143         struct snd_gf1_mem_block *pblock;
 144         unsigned int ptr1, ptr2;
 145
 146         if (w_16 && align < 2)
 147                 align = 2;
 148         block->flags = w_16 ? SNDRV_GF1_MEM_BLOCK_16BIT : 0;
 149         block->owner = SNDRV_GF1_MEM_OWNER_DRIVER;
 150         block->share = 0;
 151         block->share_id[0] = block->share_id[1] =
 152         block->share_id[2] = block->share_id[3] = 0;
 153         block->name = NULL;
 154         block->prev = block->next = NULL;
 155         for (pblock = alloc->first, idx = 0; pblock; pblock = pblock->next) {
 156                 while (pblock->ptr >= (boundary = info[idx].address + info[idx].size))
 157                         idx++;
 158                 while (pblock->ptr + pblock->size >= (boundary = info[idx].address + info[idx].size))
 159                         idx++;
 160                 ptr2 = boundary;
 161                 if (pblock->next) {
 162                         if (pblock->ptr + pblock->size == pblock->next->ptr)
 163                                 continue;
 164                         if (pblock->next->ptr < boundary)
 165                                 ptr2 = pblock->next->ptr;
 166                 }
 167                 ptr1 = ALIGN(pblock->ptr + pblock->size, align);
 168                 if (ptr1 >= ptr2)
 169                         continue;
 170                 size1 = ptr2 - ptr1;
 171                 if ((int)size <= size1) {
 172                         block->ptr = ptr1;
 173                         block->size = size;
 174                         return 0;
 175                 }
 176         }
 177         while (++idx < 4) {
 178                 if (size <= info[idx].size) {
 179                         /* I assume that bank address is already aligned.. */
 180                         block->ptr = info[idx].address;
 181                         block->size = size;
 182                         return 0;
 183                 }
 184         }
 185         return -ENOMEM;
 186 }
 187
 188 struct snd_gf1_mem_block *snd_gf1_mem_alloc(struct snd_gf1_mem * alloc, int owner,
 189                                        char *name, int size, int w_16, int align,
 190                                        unsigned int *share_id)
 191 {
 192         struct snd_gf1_mem_block block, *nblock;
 193
 194         snd_gf1_mem_lock(alloc, 0);
 195         if (share_id != NULL) {
 196                 nblock = snd_gf1_mem_share(alloc, share_id);
 197                 if (nblock != NULL) {
 198                         if (size != (int)nblock->size) {
 199                                 /* TODO: remove in the future */
 200                                 snd_printk(KERN_ERR "snd_gf1_mem_alloc - share: sizes differ\n");
 201                                 goto __std;
 202                         }
 203                         nblock->share++;
 204                         snd_gf1_mem_lock(alloc, 1);
 205                         return NULL;
 206                 }
 207         }
 208       __std:
 209         if (snd_gf1_mem_find(alloc, &block, size, w_16, align) < 0) {
 210                 snd_gf1_mem_lock(alloc, 1);
 211                 return NULL;
 212         }
 213         if (share_id != NULL)
 214                 memcpy(&block.share_id, share_id, sizeof(block.share_id));
 215         block.owner = owner;
 216         block.name = kstrdup(name, GFP_KERNEL);
 217         nblock = snd_gf1_mem_xalloc(alloc, &block);
 218         snd_gf1_mem_lock(alloc, 1);
 219         return nblock;
 220 }
 221
 222 int snd_gf1_mem_free(struct snd_gf1_mem * alloc, unsigned int address)
 223 {
 224         int result;
 225         struct snd_gf1_mem_block *block;
 226
 227         snd_gf1_mem_lock(alloc, 0);
 228         if ((block = snd_gf1_mem_look(alloc, address)) != NULL) {
 229                 result = snd_gf1_mem_xfree(alloc, block);
 230                 snd_gf1_mem_lock(alloc, 1);
 231                 return result;
 232         }
 233         snd_gf1_mem_lock(alloc, 1);
 234         return -EINVAL;
 235 }
 236
 237 int snd_gf1_mem_init(struct snd_gus_card * gus)
 238 {
 239         struct snd_gf1_mem *alloc;
 240         struct snd_gf1_mem_block block;
 241 #ifdef CONFIG_SND_DEBUG
 242         struct snd_info_entry *entry;
 243 #endif
 244
 245         alloc = &gus->gf1.mem_alloc;
 246         mutex_init(&alloc->memory_mutex);
 247         alloc->first = alloc->last = NULL;
 248         if (!gus->gf1.memory)
 249                 return 0;
 250
 251         memset(&block, 0, sizeof(block));
 252         block.owner = SNDRV_GF1_MEM_OWNER_DRIVER;
 253         if (gus->gf1.enh_mode) {
 254                 block.ptr = 0;
 255                 block.size = 1024;
 256                 block.name = kstrdup("InterWave LFOs", GFP_KERNEL);
 257                 if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
 258                         return -ENOMEM;
 259         }
 260         block.ptr = gus->gf1.default_voice_address;
 261         block.size = 4;
 262         block.name = kstrdup("Voice default (NULL's)", GFP_KERNEL);
 263         if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
 264                 return -ENOMEM;
 265 #ifdef CONFIG_SND_DEBUG
 266         if (! snd_card_proc_new(gus->card, "gusmem", &entry))
 267                 snd_info_set_text_ops(entry, gus, snd_gf1_mem_info_read);
 268 #endif
 269         return 0;
 270 }
 271
 272 int snd_gf1_mem_done(struct snd_gus_card * gus)
 273 {
 274         struct snd_gf1_mem *alloc;
 275         struct snd_gf1_mem_block *block, *nblock;
 276
 277         alloc = &gus->gf1.mem_alloc;
 278         block = alloc->first;
 279         while (block) {
 280                 nblock = block->next;
 281                 snd_gf1_mem_xfree(alloc, block);
 282                 block = nblock;
 283         }
 284         return 0;
 285 }
 286
 287 #ifdef CONFIG_SND_DEBUG
 288 static void snd_gf1_mem_info_read(struct snd_info_entry *entry,
 289                                   struct snd_info_buffer *buffer)
 290 {
 291         struct snd_gus_card *gus;
 292         struct snd_gf1_mem *alloc;
 293         struct snd_gf1_mem_block *block;
 294         unsigned int total, used;
 295         int i;
 296
 297         gus = entry->private_data;
 298         alloc = &gus->gf1.mem_alloc;
 299         mutex_lock(&alloc->memory_mutex);
 300         snd_iprintf(buffer, "8-bit banks       : \n    ");
 301         for (i = 0; i < 4; i++)
 302                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_8[i].address, alloc->banks_8[i].size >> 10, i + 1 < 4 ? "," : "");
 303         snd_iprintf(buffer, "\n"
 304                     "16-bit banks      : \n    ");
 305         for (i = total = 0; i < 4; i++) {
 306                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_16[i].address, alloc->banks_16[i].size >> 10, i + 1 < 4 ? "," : "");
 307                 total += alloc->banks_16[i].size;
 308         }
 309         snd_iprintf(buffer, "\n");
 310         used = 0;
 311         for (block = alloc->first, i = 0; block; block = block->next, i++) {
 312                 used += block->size;
 313                 snd_iprintf(buffer, "Block %i at 0x%lx onboard 0x%x size %i (0x%x):\n", i, (long) block, block->ptr, block->size, block->size);
 314                 if (block->share ||
 315                     block->share_id[0] || block->share_id[1] ||
 316                     block->share_id[2] || block->share_id[3])
 317                         snd_iprintf(buffer, "  Share           : %i [id0 0x%x] [id1 0x%x] [id2 0x%x] [id3 0x%x]\n",
 318                                 block->share,
 319                                 block->share_id[0], block->share_id[1],
 320                                 block->share_id[2], block->share_id[3]);
 321                 snd_iprintf(buffer, "  Flags           :%s\n",
 322                 block->flags & SNDRV_GF1_MEM_BLOCK_16BIT ? " 16-bit" : "");
 323                 snd_iprintf(buffer, "  Owner           : ");
 324                 switch (block->owner) {
 325                 case SNDRV_GF1_MEM_OWNER_DRIVER:
 326                         snd_iprintf(buffer, "driver - %s\n", block->name);
 327                         break;
 328                 case SNDRV_GF1_MEM_OWNER_WAVE_SIMPLE:
 329                         snd_iprintf(buffer, "SIMPLE wave\n");
 330                         break;
 331                 case SNDRV_GF1_MEM_OWNER_WAVE_GF1:
 332                         snd_iprintf(buffer, "GF1 wave\n");
 333                         break;
 334                 case SNDRV_GF1_MEM_OWNER_WAVE_IWFFFF:
 335                         snd_iprintf(buffer, "IWFFFF wave\n");
 336                         break;
 337                 default:
 338                         snd_iprintf(buffer, "unknown\n");
 339                 }
 340         }
 341         snd_iprintf(buffer, "  Total: memory = %i, used = %i, free = %i\n",
 342                     total, used, total - used);
 343         mutex_unlock(&alloc->memory_mutex);
 344 #if 0
 345         ultra_iprintf(buffer, "  Verify: free = %i, max 8-bit block = %i, max 16-bit block = %i\n",
 346                       ultra_memory_free_size(card, &card->gf1.mem_alloc),
 347                   ultra_memory_free_block(card, &card->gf1.mem_alloc, 0),
 348                  ultra_memory_free_block(card, &card->gf1.mem_alloc, 1));
 349 #endif
 350 }
 351 #endif