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Sourcecode: alsa-driver version File versions

gus_mem.c

/*
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
 *  GUS's memory allocation routines / bottom layer
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <sound/driver.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/gus.h>
#include <sound/info.h>

#ifdef CONFIG_SND_DEBUG
static void snd_gf1_mem_info_read(snd_info_entry_t *entry, 
                          snd_info_buffer_t * buffer);
#endif

void snd_gf1_mem_lock(snd_gf1_mem_t * alloc, int xup)
{
      if (!xup) {
            down(&alloc->memory_mutex);
      } else {
            up(&alloc->memory_mutex);
      }
}

snd_gf1_mem_block_t *snd_gf1_mem_xalloc(snd_gf1_mem_t * alloc,
                                snd_gf1_mem_block_t * block)
{
      snd_gf1_mem_block_t *pblock, *nblock;

      nblock = (snd_gf1_mem_block_t *) kmalloc(sizeof(snd_gf1_mem_block_t), GFP_KERNEL);
      if (nblock == NULL)
            return NULL;
      *nblock = *block;
      pblock = alloc->first;
      while (pblock) {
            if (pblock->ptr > nblock->ptr) {
                  nblock->prev = pblock->prev;
                  nblock->next = pblock;
                  pblock->prev = nblock;
                  if (pblock == alloc->first)
                        alloc->first = nblock;
                  else
                        nblock->prev->next = nblock;
                  up(&alloc->memory_mutex);
                  return NULL;
            }
            pblock = pblock->next;
      }
      nblock->next = NULL;
      if (alloc->last == NULL) {
            nblock->prev = NULL;
            alloc->first = alloc->last = nblock;
      } else {
            nblock->prev = alloc->last;
            alloc->last->next = nblock;
            alloc->last = nblock;
      }
      return nblock;
}

int snd_gf1_mem_xfree(snd_gf1_mem_t * alloc, snd_gf1_mem_block_t * block)
{
      if (block->share) {     /* ok.. shared block */
            block->share--;
            up(&alloc->memory_mutex);
            return 0;
      }
      if (alloc->first == block) {
            alloc->first = block->next;
            if (block->next)
                  block->next->prev = NULL;
      } else {
            block->prev->next = block->next;
            if (block->next)
                  block->next->prev = block->prev;
      }
      if (alloc->last == block) {
            alloc->last = block->prev;
            if (block->prev)
                  block->prev->next = NULL;
      } else {
            block->next->prev = block->prev;
            if (block->prev)
                  block->prev->next = block->next;
      }
      kfree(block->name);
      kfree(block);
      return 0;
}

snd_gf1_mem_block_t *snd_gf1_mem_look(snd_gf1_mem_t * alloc,
                              unsigned int address)
{
      snd_gf1_mem_block_t *block;

      for (block = alloc->first; block; block = block->next) {
            if (block->ptr == address) {
                  return block;
            }
      }
      return NULL;
}

snd_gf1_mem_block_t *snd_gf1_mem_share(snd_gf1_mem_t * alloc,
                               unsigned int *share_id)
{
      snd_gf1_mem_block_t *block;

      if (!share_id[0] && !share_id[1] &&
          !share_id[2] && !share_id[3])
            return NULL;
      for (block = alloc->first; block; block = block->next)
            if (!memcmp(share_id, block->share_id, sizeof(share_id)))
                  return block;
      return NULL;
}

static int snd_gf1_mem_find(snd_gf1_mem_t * alloc,
                      snd_gf1_mem_block_t * block,
                      unsigned int size, int w_16, int align)
{
      snd_gf1_bank_info_t *info = w_16 ? alloc->banks_16 : alloc->banks_8;
      unsigned int idx, boundary;
      int size1;
      snd_gf1_mem_block_t *pblock;
      unsigned int ptr1, ptr2;

      align--;
      if (w_16 && align < 1)
            align = 1;
      block->flags = w_16 ? SNDRV_GF1_MEM_BLOCK_16BIT : 0;
      block->owner = SNDRV_GF1_MEM_OWNER_DRIVER;
      block->share = 0;
      block->share_id[0] = block->share_id[1] =
      block->share_id[2] = block->share_id[3] = 0;
      block->name = NULL;
      block->prev = block->next = NULL;
      for (pblock = alloc->first, idx = 0; pblock; pblock = pblock->next) {
            while (pblock->ptr >= (boundary = info[idx].address + info[idx].size))
                  idx++;
            while (pblock->ptr + pblock->size >= (boundary = info[idx].address + info[idx].size))
                  idx++;
            ptr2 = boundary;
            if (pblock->next) {
                  if (pblock->ptr + pblock->size == pblock->next->ptr)
                        continue;
                  if (pblock->next->ptr < boundary)
                        ptr2 = pblock->next->ptr;
            }
            ptr1 = (pblock->ptr + pblock->size + align) & ~align;
            if (ptr1 >= ptr2)
                  continue;
            size1 = ptr2 - ptr1;
            if ((int)size <= size1) {
                  block->ptr = ptr1;
                  block->size = size;
                  return 0;
            }
      }
      while (++idx < 4) {
            if (size <= info[idx].size) {
                  /* I assume that bank address is already aligned.. */
                  block->ptr = info[idx].address;
                  block->size = size;
                  return 0;
            }
      }
      return -ENOMEM;
}

snd_gf1_mem_block_t *snd_gf1_mem_alloc(snd_gf1_mem_t * alloc, int owner,
                               char *name, int size, int w_16, int align,
                               unsigned int *share_id)
{
      snd_gf1_mem_block_t block, *nblock;

      snd_gf1_mem_lock(alloc, 0);
      if (share_id != NULL) {
            nblock = snd_gf1_mem_share(alloc, share_id);
            if (nblock != NULL) {
                  if (size != (int)nblock->size) {
                        /* TODO: remove in the future */
                        snd_printk("snd_gf1_mem_alloc - share: sizes differ\n");
                        goto __std;
                  }
                  nblock->share++;
                  snd_gf1_mem_lock(alloc, 1);
                  return NULL;
            }
      }
      __std:
      if (snd_gf1_mem_find(alloc, &block, size, w_16, align) < 0) {
            snd_gf1_mem_lock(alloc, 1);
            return NULL;
      }
      if (share_id != NULL)
            memcpy(&block.share_id, share_id, sizeof(block.share_id));
      block.owner = owner;
      block.name = snd_kmalloc_strdup(name, GFP_KERNEL);
      nblock = snd_gf1_mem_xalloc(alloc, &block);
      snd_gf1_mem_lock(alloc, 1);
      return nblock;
}

int snd_gf1_mem_free(snd_gf1_mem_t * alloc, unsigned int address)
{
      int result;
      snd_gf1_mem_block_t *block;

      snd_gf1_mem_lock(alloc, 0);
      if ((block = snd_gf1_mem_look(alloc, address)) != NULL) {
            result = snd_gf1_mem_xfree(alloc, block);
            snd_gf1_mem_lock(alloc, 1);
            return result;
      }
      snd_gf1_mem_lock(alloc, 1);
      return -EINVAL;
}

int snd_gf1_mem_init(snd_gus_card_t * gus)
{
      snd_gf1_mem_t *alloc;
      snd_gf1_mem_block_t block;
#ifdef CONFIG_SND_DEBUG
      snd_info_entry_t *entry;
#endif

      alloc = &gus->gf1.mem_alloc;
      init_MUTEX(&alloc->memory_mutex);
      alloc->first = alloc->last = NULL;
      if (!gus->gf1.memory)
            return 0;

      memset(&block, 0, sizeof(block));
      block.owner = SNDRV_GF1_MEM_OWNER_DRIVER;
      if (gus->gf1.enh_mode) {
            block.ptr = 0;
            block.size = 1024;
            block.name = snd_kmalloc_strdup("InterWave LFOs", GFP_KERNEL);
            if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
                  return -ENOMEM;
      }
      block.ptr = gus->gf1.default_voice_address;
      block.size = 4;
      block.name = snd_kmalloc_strdup("Voice default (NULL's)", GFP_KERNEL);
      if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
            return -ENOMEM;
#ifdef CONFIG_SND_DEBUG
      if (! snd_card_proc_new(gus->card, "gusmem", &entry)) {
            snd_info_set_text_ops(entry, gus, 1024, snd_gf1_mem_info_read);
            entry->c.text.read_size = 256 * 1024;
      }
#endif
      return 0;
}

int snd_gf1_mem_done(snd_gus_card_t * gus)
{
      snd_gf1_mem_t *alloc;
      snd_gf1_mem_block_t *block, *nblock;

      alloc = &gus->gf1.mem_alloc;
      block = alloc->first;
      while (block) {
            nblock = block->next;
            snd_gf1_mem_xfree(alloc, block);
            block = nblock;
      }
      return 0;
}

#ifdef CONFIG_SND_DEBUG
static void snd_gf1_mem_info_read(snd_info_entry_t *entry, 
                          snd_info_buffer_t * buffer)
{
      snd_gus_card_t *gus;
      snd_gf1_mem_t *alloc;
      snd_gf1_mem_block_t *block;
      unsigned int total, used;
      int i;

      gus = entry->private_data;
      alloc = &gus->gf1.mem_alloc;
      down(&alloc->memory_mutex);
      snd_iprintf(buffer, "8-bit banks       : \n    ");
      for (i = 0; i < 4; i++)
            snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_8[i].address, alloc->banks_8[i].size >> 10, i + 1 < 4 ? "," : "");
      snd_iprintf(buffer, "\n"
                "16-bit banks      : \n    ");
      for (i = total = 0; i < 4; i++) {
            snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_16[i].address, alloc->banks_16[i].size >> 10, i + 1 < 4 ? "," : "");
            total += alloc->banks_16[i].size;
      }
      snd_iprintf(buffer, "\n");
      used = 0;
      for (block = alloc->first, i = 0; block; block = block->next, i++) {
            used += block->size;
            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);
            if (block->share ||
                block->share_id[0] || block->share_id[1] ||
                block->share_id[2] || block->share_id[3])
                  snd_iprintf(buffer, "  Share           : %i [id0 0x%x] [id1 0x%x] [id2 0x%x] [id3 0x%x]\n",
                        block->share,
                        block->share_id[0], block->share_id[1],
                        block->share_id[2], block->share_id[3]);
            snd_iprintf(buffer, "  Flags           :%s\n",
            block->flags & SNDRV_GF1_MEM_BLOCK_16BIT ? " 16-bit" : "");
            snd_iprintf(buffer, "  Owner           : ");
            switch (block->owner) {
            case SNDRV_GF1_MEM_OWNER_DRIVER:
                  snd_iprintf(buffer, "driver - %s\n", block->name);
                  break;
            case SNDRV_GF1_MEM_OWNER_WAVE_SIMPLE:
                  snd_iprintf(buffer, "SIMPLE wave\n");
                  break;
            case SNDRV_GF1_MEM_OWNER_WAVE_GF1:
                  snd_iprintf(buffer, "GF1 wave\n");
                  break;
            case SNDRV_GF1_MEM_OWNER_WAVE_IWFFFF:
                  snd_iprintf(buffer, "IWFFFF wave\n");
                  break;
            default:
                  snd_iprintf(buffer, "unknown\n");
            }
      }
      snd_iprintf(buffer, "  Total: memory = %i, used = %i, free = %i\n",
                total, used, total - used);
      up(&alloc->memory_mutex);
#if 0
      ultra_iprintf(buffer, "  Verify: free = %i, max 8-bit block = %i, max 16-bit block = %i\n",
                  ultra_memory_free_size(card, &card->gf1.mem_alloc),
              ultra_memory_free_block(card, &card->gf1.mem_alloc, 0),
             ultra_memory_free_block(card, &card->gf1.mem_alloc, 1));
#endif
}
#endif

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