- 根目录:
- sound
- isa
- gus
- gus_mem.c
/*
* Copyright (c) by Jaroslav Kysela <perex@perex.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 <linux/slab.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/gus.h>
#include <sound/info.h>
#ifdef CONFIG_SND_DEBUG
static void snd_gf1_mem_info_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer);
#endif
void snd_gf1_mem_lock(struct snd_gf1_mem * alloc, int xup)
{
if (!xup) {
mutex_lock(&alloc->memory_mutex);
} else {
mutex_unlock(&alloc->memory_mutex);
}
}
static struct snd_gf1_mem_block *snd_gf1_mem_xalloc(struct snd_gf1_mem * alloc,
struct snd_gf1_mem_block * block)
{
struct snd_gf1_mem_block *pblock, *nblock;
nblock = kmalloc(sizeof(struct snd_gf1_mem_block), 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;
mutex_unlock(&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(struct snd_gf1_mem * alloc, struct snd_gf1_mem_block * block)
{
if (block->share) { /* ok.. shared block */
block->share--;
mutex_unlock(&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;
}
static struct snd_gf1_mem_block *snd_gf1_mem_look(struct snd_gf1_mem * alloc,
unsigned int address)
{
struct snd_gf1_mem_block *block;
for (block = alloc->first; block; block = block->next) {
if (block->ptr == address) {
return block;
}
}
return NULL;
}
static struct snd_gf1_mem_block *snd_gf1_mem_share(struct snd_gf1_mem * alloc,
unsigned int *share_id)
{
struct snd_gf1_mem_block *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(block->share_id)))
return block;
return NULL;
}
static int snd_gf1_mem_find(struct snd_gf1_mem * alloc,
struct snd_gf1_mem_block * block,
unsigned int size, int w_16, int align)
{
struct snd_gf1_bank_info *info = w_16 ? alloc->banks_16 : alloc->banks_8;
unsigned int idx, boundary;
int size1;
struct snd_gf1_mem_block *pblock;
unsigned int ptr1, ptr2;
if (w_16 && align < 2)
align = 2;
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 = ALIGN(pblock->ptr + pblock->size, 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;
}
struct snd_gf1_mem_block *snd_gf1_mem_alloc(struct snd_gf1_mem * alloc, int owner,
char *name, int size, int w_16, int align,
unsigned int *share_id)
{
struct snd_gf1_mem_block 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(KERN_ERR "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 = kstrdup(name, GFP_KERNEL);
nblock = snd_gf1_mem_xalloc(alloc, &block);
snd_gf1_mem_lock(alloc, 1);
return nblock;
}
int snd_gf1_mem_free(struct snd_gf1_mem * alloc, unsigned int address)
{
int result;
struct snd_gf1_mem_block *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(struct snd_gus_card * gus)
{
struct snd_gf1_mem *alloc;
struct snd_gf1_mem_block block;
#ifdef CONFIG_SND_DEBUG
struct snd_info_entry *entry;
#endif
alloc = &gus->gf1.mem_alloc;
mutex_init(&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 = kstrdup("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 = kstrdup("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, snd_gf1_mem_info_read);
#endif
return 0;
}
int snd_gf1_mem_done(struct snd_gus_card * gus)
{
struct snd_gf1_mem *alloc;
struct snd_gf1_mem_block *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(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_gus_card *gus;
struct snd_gf1_mem *alloc;
struct snd_gf1_mem_block *block;
unsigned int total, used;
int i;
gus = entry->private_data;
alloc = &gus->gf1.mem_alloc;
mutex_lock(&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);
mutex_unlock(&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