sound/isa/gus/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         if ((block = snd_gf1_mem_look(alloc, address)) != NULL) {
 214                 result = snd_gf1_mem_xfree(alloc, block);
 215                 snd_gf1_mem_lock(alloc, 1);
 216                 return result;
 217         }
 218         snd_gf1_mem_lock(alloc, 1);
 219         return -EINVAL;
 220 }
 221
 222 int snd_gf1_mem_init(struct snd_gus_card * gus)
 223 {
 224         struct snd_gf1_mem *alloc;
 225         struct snd_gf1_mem_block block;
 226
 227         alloc = &gus->gf1.mem_alloc;
 228         mutex_init(&alloc->memory_mutex);
 229         alloc->first = alloc->last = NULL;
 230         if (!gus->gf1.memory)
 231                 return 0;
 232
 233         memset(&block, 0, sizeof(block));
 234         block.owner = SNDRV_GF1_MEM_OWNER_DRIVER;
 235         if (gus->gf1.enh_mode) {
 236                 block.ptr = 0;
 237                 block.size = 1024;
 238                 block.name = kstrdup("InterWave LFOs", GFP_KERNEL);
 239                 if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
 240                         return -ENOMEM;
 241         }
 242         block.ptr = gus->gf1.default_voice_address;
 243         block.size = 4;
 244         block.name = kstrdup("Voice default (NULL's)", GFP_KERNEL);
 245         if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
 246                 return -ENOMEM;
 247 #ifdef CONFIG_SND_DEBUG
 248         snd_card_ro_proc_new(gus->card, "gusmem", gus, snd_gf1_mem_info_read);
 249 #endif
 250         return 0;
 251 }
 252
 253 int snd_gf1_mem_done(struct snd_gus_card * gus)
 254 {
 255         struct snd_gf1_mem *alloc;
 256         struct snd_gf1_mem_block *block, *nblock;
 257
 258         alloc = &gus->gf1.mem_alloc;
 259         block = alloc->first;
 260         while (block) {
 261                 nblock = block->next;
 262                 snd_gf1_mem_xfree(alloc, block);
 263                 block = nblock;
 264         }
 265         return 0;
 266 }
 267
 268 #ifdef CONFIG_SND_DEBUG
 269 static void snd_gf1_mem_info_read(struct snd_info_entry *entry,
 270                                   struct snd_info_buffer *buffer)
 271 {
 272         struct snd_gus_card *gus;
 273         struct snd_gf1_mem *alloc;
 274         struct snd_gf1_mem_block *block;
 275         unsigned int total, used;
 276         int i;
 277
 278         gus = entry->private_data;
 279         alloc = &gus->gf1.mem_alloc;
 280         mutex_lock(&alloc->memory_mutex);
 281         snd_iprintf(buffer, "8-bit banks       : \n    ");
 282         for (i = 0; i < 4; i++)
 283                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_8[i].address, alloc->banks_8[i].size >> 10, i + 1 < 4 ? "," : "");
 284         snd_iprintf(buffer, "\n"
 285                     "16-bit banks      : \n    ");
 286         for (i = total = 0; i < 4; i++) {
 287                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_16[i].address, alloc->banks_16[i].size >> 10, i + 1 < 4 ? "," : "");
 288                 total += alloc->banks_16[i].size;
 289         }
 290         snd_iprintf(buffer, "\n");
 291         used = 0;
 292         for (block = alloc->first, i = 0; block; block = block->next, i++) {
 293                 used += block->size;
 294                 snd_iprintf(buffer, "Block %i onboard 0x%x size %i (0x%x):\n", i, block->ptr, block->size, block->size);
 295                 if (block->share ||
 296                     block->share_id[0] || block->share_id[1] ||
 297                     block->share_id[2] || block->share_id[3])
 298                         snd_iprintf(buffer, "  Share           : %i [id0 0x%x] [id1 0x%x] [id2 0x%x] [id3 0x%x]\n",
 299                                 block->share,
 300                                 block->share_id[0], block->share_id[1],
 301                                 block->share_id[2], block->share_id[3]);
 302                 snd_iprintf(buffer, "  Flags           :%s\n",
 303                 block->flags & SNDRV_GF1_MEM_BLOCK_16BIT ? " 16-bit" : "");
 304                 snd_iprintf(buffer, "  Owner           : ");
 305                 switch (block->owner) {
 306                 case SNDRV_GF1_MEM_OWNER_DRIVER:
 307                         snd_iprintf(buffer, "driver - %s\n", block->name);
 308                         break;
 309                 case SNDRV_GF1_MEM_OWNER_WAVE_SIMPLE:
 310                         snd_iprintf(buffer, "SIMPLE wave\n");
 311                         break;
 312                 case SNDRV_GF1_MEM_OWNER_WAVE_GF1:
 313                         snd_iprintf(buffer, "GF1 wave\n");
 314                         break;
 315                 case SNDRV_GF1_MEM_OWNER_WAVE_IWFFFF:
 316                         snd_iprintf(buffer, "IWFFFF wave\n");
 317                         break;
 318                 default:
 319                         snd_iprintf(buffer, "unknown\n");
 320                 }
 321         }
 322         snd_iprintf(buffer, "  Total: memory = %i, used = %i, free = %i\n",
 323                     total, used, total - used);
 324         mutex_unlock(&alloc->memory_mutex);
 325 #if 0
 326         ultra_iprintf(buffer, "  Verify: free = %i, max 8-bit block = %i, max 16-bit block = %i\n",
 327                       ultra_memory_free_size(card, &card->gf1.mem_alloc),
 328                   ultra_memory_free_block(card, &card->gf1.mem_alloc, 0),
 329                  ultra_memory_free_block(card, &card->gf1.mem_alloc, 1));
 330 #endif
 331 }
 332 #endif