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         align--;
 147         if (w_16 && align < 1)
 148                 align = 1;
 149         block->flags = w_16 ? SNDRV_GF1_MEM_BLOCK_16BIT : 0;
 150         block->owner = SNDRV_GF1_MEM_OWNER_DRIVER;
 151         block->share = 0;
 152         block->share_id[0] = block->share_id[1] =
 153         block->share_id[2] = block->share_id[3] = 0;
 154         block->name = NULL;
 155         block->prev = block->next = NULL;
 156         for (pblock = alloc->first, idx = 0; pblock; pblock = pblock->next) {
 157                 while (pblock->ptr >= (boundary = info[idx].address + info[idx].size))
 158                         idx++;
 159                 while (pblock->ptr + pblock->size >= (boundary = info[idx].address + info[idx].size))
 160                         idx++;
 161                 ptr2 = boundary;
 162                 if (pblock->next) {
 163                         if (pblock->ptr + pblock->size == pblock->next->ptr)
 164                                 continue;
 165                         if (pblock->next->ptr < boundary)
 166                                 ptr2 = pblock->next->ptr;
 167                 }
 168                 ptr1 = (pblock->ptr + pblock->size + align) & ~align;
 169                 if (ptr1 >= ptr2)
 170                         continue;
 171                 size1 = ptr2 - ptr1;
 172                 if ((int)size <= size1) {
 173                         block->ptr = ptr1;
 174                         block->size = size;
 175                         return 0;
 176                 }
 177         }
 178         while (++idx < 4) {
 179                 if (size <= info[idx].size) {
 180                         /* I assume that bank address is already aligned.. */
 181                         block->ptr = info[idx].address;
 182                         block->size = size;
 183                         return 0;
 184                 }
 185         }
 186         return -ENOMEM;
 187 }
 188
 189 struct snd_gf1_mem_block *snd_gf1_mem_alloc(struct snd_gf1_mem * alloc, int owner,
 190                                        char *name, int size, int w_16, int align,
 191                                        unsigned int *share_id)
 192 {
 193         struct snd_gf1_mem_block block, *nblock;
 194
 195         snd_gf1_mem_lock(alloc, 0);
 196         if (share_id != NULL) {
 197                 nblock = snd_gf1_mem_share(alloc, share_id);
 198                 if (nblock != NULL) {
 199                         if (size != (int)nblock->size) {
 200                                 /* TODO: remove in the future */
 201                                 snd_printk(KERN_ERR "snd_gf1_mem_alloc - share: sizes differ\n");
 202                                 goto __std;
 203                         }
 204                         nblock->share++;
 205                         snd_gf1_mem_lock(alloc, 1);
 206                         return NULL;
 207                 }
 208         }
 209       __std:
 210         if (snd_gf1_mem_find(alloc, &block, size, w_16, align) < 0) {
 211                 snd_gf1_mem_lock(alloc, 1);
 212                 return NULL;
 213         }
 214         if (share_id != NULL)
 215                 memcpy(&block.share_id, share_id, sizeof(block.share_id));
 216         block.owner = owner;
 217         block.name = kstrdup(name, GFP_KERNEL);
 218         nblock = snd_gf1_mem_xalloc(alloc, &block);
 219         snd_gf1_mem_lock(alloc, 1);
 220         return nblock;
 221 }
 222
 223 int snd_gf1_mem_free(struct snd_gf1_mem * alloc, unsigned int address)
 224 {
 225         int result;
 226         struct snd_gf1_mem_block *block;
 227
 228         snd_gf1_mem_lock(alloc, 0);
 229         if ((block = snd_gf1_mem_look(alloc, address)) != NULL) {
 230                 result = snd_gf1_mem_xfree(alloc, block);
 231                 snd_gf1_mem_lock(alloc, 1);
 232                 return result;
 233         }
 234         snd_gf1_mem_lock(alloc, 1);
 235         return -EINVAL;
 236 }
 237
 238 int snd_gf1_mem_init(struct snd_gus_card * gus)
 239 {
 240         struct snd_gf1_mem *alloc;
 241         struct snd_gf1_mem_block block;
 242 #ifdef CONFIG_SND_DEBUG
 243         struct snd_info_entry *entry;
 244 #endif
 245
 246         alloc = &gus->gf1.mem_alloc;
 247         mutex_init(&alloc->memory_mutex);
 248         alloc->first = alloc->last = NULL;
 249         if (!gus->gf1.memory)
 250                 return 0;
 251
 252         memset(&block, 0, sizeof(block));
 253         block.owner = SNDRV_GF1_MEM_OWNER_DRIVER;
 254         if (gus->gf1.enh_mode) {
 255                 block.ptr = 0;
 256                 block.size = 1024;
 257                 block.name = kstrdup("InterWave LFOs", GFP_KERNEL);
 258                 if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
 259                         return -ENOMEM;
 260         }
 261         block.ptr = gus->gf1.default_voice_address;
 262         block.size = 4;
 263         block.name = kstrdup("Voice default (NULL's)", GFP_KERNEL);
 264         if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
 265                 return -ENOMEM;
 266 #ifdef CONFIG_SND_DEBUG
 267         if (! snd_card_proc_new(gus->card, "gusmem", &entry)) {
 268                 snd_info_set_text_ops(entry, gus, 1024, snd_gf1_mem_info_read);
 269                 entry->c.text.read_size = 256 * 1024;
 270         }
 271 #endif
 272         return 0;
 273 }
 274
 275 int snd_gf1_mem_done(struct snd_gus_card * gus)
 276 {
 277         struct snd_gf1_mem *alloc;
 278         struct snd_gf1_mem_block *block, *nblock;
 279
 280         alloc = &gus->gf1.mem_alloc;
 281         block = alloc->first;
 282         while (block) {
 283                 nblock = block->next;
 284                 snd_gf1_mem_xfree(alloc, block);
 285                 block = nblock;
 286         }
 287         return 0;
 288 }
 289
 290 #ifdef CONFIG_SND_DEBUG
 291 static void snd_gf1_mem_info_read(struct snd_info_entry *entry,
 292                                   struct snd_info_buffer *buffer)
 293 {
 294         struct snd_gus_card *gus;
 295         struct snd_gf1_mem *alloc;
 296         struct snd_gf1_mem_block *block;
 297         unsigned int total, used;
 298         int i;
 299
 300         gus = entry->private_data;
 301         alloc = &gus->gf1.mem_alloc;
 302         mutex_lock(&alloc->memory_mutex);
 303         snd_iprintf(buffer, "8-bit banks       : \n    ");
 304         for (i = 0; i < 4; i++)
 305                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_8[i].address, alloc->banks_8[i].size >> 10, i + 1 < 4 ? "," : "");
 306         snd_iprintf(buffer, "\n"
 307                     "16-bit banks      : \n    ");
 308         for (i = total = 0; i < 4; i++) {
 309                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_16[i].address, alloc->banks_16[i].size >> 10, i + 1 < 4 ? "," : "");
 310                 total += alloc->banks_16[i].size;
 311         }
 312         snd_iprintf(buffer, "\n");
 313         used = 0;
 314         for (block = alloc->first, i = 0; block; block = block->next, i++) {
 315                 used += block->size;
 316                 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);
 317                 if (block->share ||
 318                     block->share_id[0] || block->share_id[1] ||
 319                     block->share_id[2] || block->share_id[3])
 320                         snd_iprintf(buffer, "  Share           : %i [id0 0x%x] [id1 0x%x] [id2 0x%x] [id3 0x%x]\n",
 321                                 block->share,
 322                                 block->share_id[0], block->share_id[1],
 323                                 block->share_id[2], block->share_id[3]);
 324                 snd_iprintf(buffer, "  Flags           :%s\n",
 325                 block->flags & SNDRV_GF1_MEM_BLOCK_16BIT ? " 16-bit" : "");
 326                 snd_iprintf(buffer, "  Owner           : ");
 327                 switch (block->owner) {
 328                 case SNDRV_GF1_MEM_OWNER_DRIVER:
 329                         snd_iprintf(buffer, "driver - %s\n", block->name);
 330                         break;
 331                 case SNDRV_GF1_MEM_OWNER_WAVE_SIMPLE:
 332                         snd_iprintf(buffer, "SIMPLE wave\n");
 333                         break;
 334                 case SNDRV_GF1_MEM_OWNER_WAVE_GF1:
 335                         snd_iprintf(buffer, "GF1 wave\n");
 336                         break;
 337                 case SNDRV_GF1_MEM_OWNER_WAVE_IWFFFF:
 338                         snd_iprintf(buffer, "IWFFFF wave\n");
 339                         break;
 340                 default:
 341                         snd_iprintf(buffer, "unknown\n");
 342                 }
 343         }
 344         snd_iprintf(buffer, "  Total: memory = %i, used = %i, free = %i\n",
 345                     total, used, total - used);
 346         mutex_unlock(&alloc->memory_mutex);
 347 #if 0
 348         ultra_iprintf(buffer, "  Verify: free = %i, max 8-bit block = %i, max 16-bit block = %i\n",
 349                       ultra_memory_free_size(card, &card->gf1.mem_alloc),
 350                   ultra_memory_free_block(card, &card->gf1.mem_alloc, 0),
 351                  ultra_memory_free_block(card, &card->gf1.mem_alloc, 1));
 352 #endif
 353 }
 354 #endif