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