gus_mem.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *  GUS's memory allocation routines / bottom layer
   5  */
   6
   7 #include <linux/slab.h>
   8 #include <linux/string.h>
   9 #include <sound/core.h>
  10 #include <sound/gus.h>
  11 #include <sound/info.h>
  12
  13 #ifdef CONFIG_SND_DEBUG
  14 static void snd_gf1_mem_info_read(struct snd_info_entry *entry,
  15                                   struct snd_info_buffer *buffer);
  16 #endif
  17
  18 void snd_gf1_mem_lock(struct snd_gf1_mem * alloc, int xup)
  19 {
  20         if (!xup) {
  21                 mutex_lock(&alloc->memory_mutex);
  22         } else {
  23                 mutex_unlock(&alloc->memory_mutex);
  24         }
  25 }
  26
  27 static struct snd_gf1_mem_block *snd_gf1_mem_xalloc(struct snd_gf1_mem * alloc,
  28                                                struct snd_gf1_mem_block * block)
  29 {
  30         struct snd_gf1_mem_block *pblock, *nblock;
  31
  32         nblock = kmalloc(sizeof(struct snd_gf1_mem_block), GFP_KERNEL);
  33         if (nblock == NULL)
  34                 return NULL;
  35         *nblock = *block;
  36         pblock = alloc->first;
  37         while (pblock) {
  38                 if (pblock->ptr > nblock->ptr) {
  39                         nblock->prev = pblock->prev;
  40                         nblock->next = pblock;
  41                         pblock->prev = nblock;
  42                         if (pblock == alloc->first)
  43                                 alloc->first = nblock;
  44                         else
  45                                 nblock->prev->next = nblock;
  46                         mutex_unlock(&alloc->memory_mutex);
  47                         return NULL;
  48                 }
  49                 pblock = pblock->next;
  50         }
  51         nblock->next = NULL;
  52         if (alloc->last == NULL) {
  53                 nblock->prev = NULL;
  54                 alloc->first = alloc->last = nblock;
  55         } else {
  56                 nblock->prev = alloc->last;
  57                 alloc->last->next = nblock;
  58                 alloc->last = nblock;
  59         }
  60         return nblock;
  61 }
  62
  63 int snd_gf1_mem_xfree(struct snd_gf1_mem * alloc, struct snd_gf1_mem_block * block)
  64 {
  65         if (block->share) {     /* ok.. shared block */
  66                 block->share--;
  67                 mutex_unlock(&alloc->memory_mutex);
  68                 return 0;
  69         }
  70         if (alloc->first == block) {
  71                 alloc->first = block->next;
  72                 if (block->next)
  73                         block->next->prev = NULL;
  74         } else {
  75                 block->prev->next = block->next;
  76                 if (block->next)
  77                         block->next->prev = block->prev;
  78         }
  79         if (alloc->last == block) {
  80                 alloc->last = block->prev;
  81                 if (block->prev)
  82                         block->prev->next = NULL;
  83         } else {
  84                 block->next->prev = block->prev;
  85                 if (block->prev)
  86                         block->prev->next = block->next;
  87         }
  88         kfree(block->name);
  89         kfree(block);
  90         return 0;
  91 }
  92
  93 static struct snd_gf1_mem_block *snd_gf1_mem_look(struct snd_gf1_mem * alloc,
  94                                              unsigned int address)
  95 {
  96         struct snd_gf1_mem_block *block;
  97
  98         for (block = alloc->first; block; block = block->next) {
  99                 if (block->ptr == address) {
 100                         return block;
 101                 }
 102         }
 103         return NULL;
 104 }
 105
 106 static struct snd_gf1_mem_block *snd_gf1_mem_share(struct snd_gf1_mem * alloc,
 107                                               unsigned int *share_id)
 108 {
 109         struct snd_gf1_mem_block *block;
 110
 111         if (!share_id[0] && !share_id[1] &&
 112             !share_id[2] && !share_id[3])
 113                 return NULL;
 114         for (block = alloc->first; block; block = block->next)
 115                 if (!memcmp(share_id, block->share_id,
 116                                 sizeof(block->share_id)))
 117                         return block;
 118         return NULL;
 119 }
 120
 121 static int snd_gf1_mem_find(struct snd_gf1_mem * alloc,
 122                             struct snd_gf1_mem_block * block,
 123                             unsigned int size, int w_16, int align)
 124 {
 125         struct snd_gf1_bank_info *info = w_16 ? alloc->banks_16 : alloc->banks_8;
 126         unsigned int idx, boundary;
 127         int size1;
 128         struct snd_gf1_mem_block *pblock;
 129         unsigned int ptr1, ptr2;
 130
 131         if (w_16 && align < 2)
 132                 align = 2;
 133         block->flags = w_16 ? SNDRV_GF1_MEM_BLOCK_16BIT : 0;
 134         block->owner = SNDRV_GF1_MEM_OWNER_DRIVER;
 135         block->share = 0;
 136         block->share_id[0] = block->share_id[1] =
 137         block->share_id[2] = block->share_id[3] = 0;
 138         block->name = NULL;
 139         block->prev = block->next = NULL;
 140         for (pblock = alloc->first, idx = 0; pblock; pblock = pblock->next) {
 141                 while (pblock->ptr >= (boundary = info[idx].address + info[idx].size))
 142                         idx++;
 143                 while (pblock->ptr + pblock->size >= (boundary = info[idx].address + info[idx].size))
 144                         idx++;
 145                 ptr2 = boundary;
 146                 if (pblock->next) {
 147                         if (pblock->ptr + pblock->size == pblock->next->ptr)
 148                                 continue;
 149                         if (pblock->next->ptr < boundary)
 150                                 ptr2 = pblock->next->ptr;
 151                 }
 152                 ptr1 = ALIGN(pblock->ptr + pblock->size, align);
 153                 if (ptr1 >= ptr2)
 154                         continue;
 155                 size1 = ptr2 - ptr1;
 156                 if ((int)size <= size1) {
 157                         block->ptr = ptr1;
 158                         block->size = size;
 159                         return 0;
 160                 }
 161         }
 162         while (++idx < 4) {
 163                 if (size <= info[idx].size) {
 164                         /* I assume that bank address is already aligned.. */
 165                         block->ptr = info[idx].address;
 166                         block->size = size;
 167                         return 0;
 168                 }
 169         }
 170         return -ENOMEM;
 171 }
 172
 173 struct snd_gf1_mem_block *snd_gf1_mem_alloc(struct snd_gf1_mem * alloc, int owner,
 174                                        char *name, int size, int w_16, int align,
 175                                        unsigned int *share_id)
 176 {
 177         struct snd_gf1_mem_block block, *nblock;
 178
 179         snd_gf1_mem_lock(alloc, 0);
 180         if (share_id != NULL) {
 181                 nblock = snd_gf1_mem_share(alloc, share_id);
 182                 if (nblock != NULL) {
 183                         if (size != (int)nblock->size) {
 184                                 /* TODO: remove in the future */
 185                                 snd_printk(KERN_ERR "snd_gf1_mem_alloc - share: sizes differ\n");
 186                                 goto __std;
 187                         }
 188                         nblock->share++;
 189                         snd_gf1_mem_lock(alloc, 1);
 190                         return NULL;
 191                 }
 192         }
 193       __std:
 194         if (snd_gf1_mem_find(alloc, &block, size, w_16, align) < 0) {
 195                 snd_gf1_mem_lock(alloc, 1);
 196                 return NULL;
 197         }
 198         if (share_id != NULL)
 199                 memcpy(&block.share_id, share_id, sizeof(block.share_id));
 200         block.owner = owner;
 201         block.name = kstrdup(name, GFP_KERNEL);
 202         nblock = snd_gf1_mem_xalloc(alloc, &block);
 203         snd_gf1_mem_lock(alloc, 1);
 204         return nblock;
 205 }
 206
 207 int snd_gf1_mem_free(struct snd_gf1_mem * alloc, unsigned int address)
 208 {
 209         int result;
 210         struct snd_gf1_mem_block *block;
 211
 212         snd_gf1_mem_lock(alloc, 0);
 213         block = snd_gf1_mem_look(alloc, address);
 214         if (block) {
 215                 result = snd_gf1_mem_xfree(alloc, block);
 216                 snd_gf1_mem_lock(alloc, 1);
 217                 return result;
 218         }
 219         snd_gf1_mem_lock(alloc, 1);
 220         return -EINVAL;
 221 }
 222
 223 int snd_gf1_mem_init(struct snd_gus_card * gus)
 224 {
 225         struct snd_gf1_mem *alloc;
 226         struct snd_gf1_mem_block block;
 227
 228         alloc = &gus->gf1.mem_alloc;
 229         mutex_init(&alloc->memory_mutex);
 230         alloc->first = alloc->last = NULL;
 231         if (!gus->gf1.memory)
 232                 return 0;
 233
 234         memset(&block, 0, sizeof(block));
 235         block.owner = SNDRV_GF1_MEM_OWNER_DRIVER;
 236         if (gus->gf1.enh_mode) {
 237                 block.ptr = 0;
 238                 block.size = 1024;
 239                 block.name = kstrdup("InterWave LFOs", GFP_KERNEL);
 240                 if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
 241                         return -ENOMEM;
 242         }
 243         block.ptr = gus->gf1.default_voice_address;
 244         block.size = 4;
 245         block.name = kstrdup("Voice default (NULL's)", GFP_KERNEL);
 246         if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
 247                 return -ENOMEM;
 248 #ifdef CONFIG_SND_DEBUG
 249         snd_card_ro_proc_new(gus->card, "gusmem", gus, snd_gf1_mem_info_read);
 250 #endif
 251         return 0;
 252 }
 253
 254 int snd_gf1_mem_done(struct snd_gus_card * gus)
 255 {
 256         struct snd_gf1_mem *alloc;
 257         struct snd_gf1_mem_block *block, *nblock;
 258
 259         alloc = &gus->gf1.mem_alloc;
 260         block = alloc->first;
 261         while (block) {
 262                 nblock = block->next;
 263                 snd_gf1_mem_xfree(alloc, block);
 264                 block = nblock;
 265         }
 266         return 0;
 267 }
 268
 269 #ifdef CONFIG_SND_DEBUG
 270 static void snd_gf1_mem_info_read(struct snd_info_entry *entry,
 271                                   struct snd_info_buffer *buffer)
 272 {
 273         struct snd_gus_card *gus;
 274         struct snd_gf1_mem *alloc;
 275         struct snd_gf1_mem_block *block;
 276         unsigned int total, used;
 277         int i;
 278
 279         gus = entry->private_data;
 280         alloc = &gus->gf1.mem_alloc;
 281         mutex_lock(&alloc->memory_mutex);
 282         snd_iprintf(buffer, "8-bit banks       : \n    ");
 283         for (i = 0; i < 4; i++)
 284                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_8[i].address, alloc->banks_8[i].size >> 10, i + 1 < 4 ? "," : "");
 285         snd_iprintf(buffer, "\n"
 286                     "16-bit banks      : \n    ");
 287         for (i = total = 0; i < 4; i++) {
 288                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_16[i].address, alloc->banks_16[i].size >> 10, i + 1 < 4 ? "," : "");
 289                 total += alloc->banks_16[i].size;
 290         }
 291         snd_iprintf(buffer, "\n");
 292         used = 0;
 293         for (block = alloc->first, i = 0; block; block = block->next, i++) {
 294                 used += block->size;
 295                 snd_iprintf(buffer, "Block %i onboard 0x%x size %i (0x%x):\n", i, block->ptr, block->size, block->size);
 296                 if (block->share ||
 297                     block->share_id[0] || block->share_id[1] ||
 298                     block->share_id[2] || block->share_id[3])
 299                         snd_iprintf(buffer, "  Share           : %i [id0 0x%x] [id1 0x%x] [id2 0x%x] [id3 0x%x]\n",
 300                                 block->share,
 301                                 block->share_id[0], block->share_id[1],
 302                                 block->share_id[2], block->share_id[3]);
 303                 snd_iprintf(buffer, "  Flags           :%s\n",
 304                 block->flags & SNDRV_GF1_MEM_BLOCK_16BIT ? " 16-bit" : "");
 305                 snd_iprintf(buffer, "  Owner           : ");
 306                 switch (block->owner) {
 307                 case SNDRV_GF1_MEM_OWNER_DRIVER:
 308                         snd_iprintf(buffer, "driver - %s\n", block->name);
 309                         break;
 310                 case SNDRV_GF1_MEM_OWNER_WAVE_SIMPLE:
 311                         snd_iprintf(buffer, "SIMPLE wave\n");
 312                         break;
 313                 case SNDRV_GF1_MEM_OWNER_WAVE_GF1:
 314                         snd_iprintf(buffer, "GF1 wave\n");
 315                         break;
 316                 case SNDRV_GF1_MEM_OWNER_WAVE_IWFFFF:
 317                         snd_iprintf(buffer, "IWFFFF wave\n");
 318                         break;
 319                 default:
 320                         snd_iprintf(buffer, "unknown\n");
 321                 }
 322         }
 323         snd_iprintf(buffer, "  Total: memory = %i, used = %i, free = %i\n",
 324                     total, used, total - used);
 325         mutex_unlock(&alloc->memory_mutex);
 326 #if 0
 327         ultra_iprintf(buffer, "  Verify: free = %i, max 8-bit block = %i, max 16-bit block = %i\n",
 328                       ultra_memory_free_size(card, &card->gf1.mem_alloc),
 329                   ultra_memory_free_block(card, &card->gf1.mem_alloc, 0),
 330                  ultra_memory_free_block(card, &card->gf1.mem_alloc, 1));
 331 #endif
 332 }
 333 #endif