352 lines
9.7 KiB
C
352 lines
9.7 KiB
C
/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* GUS's memory allocation routines / bottom layer
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <sound/core.h>
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#include <sound/gus.h>
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#include <sound/info.h>
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#ifdef CONFIG_SND_DEBUG
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static void snd_gf1_mem_info_read(struct snd_info_entry *entry,
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struct snd_info_buffer *buffer);
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#endif
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void snd_gf1_mem_lock(struct snd_gf1_mem * alloc, int xup)
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{
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if (!xup) {
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mutex_lock(&alloc->memory_mutex);
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} else {
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mutex_unlock(&alloc->memory_mutex);
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}
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}
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static struct snd_gf1_mem_block *snd_gf1_mem_xalloc(struct snd_gf1_mem * alloc,
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struct snd_gf1_mem_block * block)
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{
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struct snd_gf1_mem_block *pblock, *nblock;
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nblock = kmalloc(sizeof(struct snd_gf1_mem_block), GFP_KERNEL);
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if (nblock == NULL)
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return NULL;
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*nblock = *block;
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pblock = alloc->first;
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while (pblock) {
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if (pblock->ptr > nblock->ptr) {
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nblock->prev = pblock->prev;
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nblock->next = pblock;
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pblock->prev = nblock;
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if (pblock == alloc->first)
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alloc->first = nblock;
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else
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nblock->prev->next = nblock;
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mutex_unlock(&alloc->memory_mutex);
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return NULL;
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}
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pblock = pblock->next;
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}
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nblock->next = NULL;
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if (alloc->last == NULL) {
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nblock->prev = NULL;
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alloc->first = alloc->last = nblock;
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} else {
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nblock->prev = alloc->last;
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alloc->last->next = nblock;
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alloc->last = nblock;
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}
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return nblock;
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}
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int snd_gf1_mem_xfree(struct snd_gf1_mem * alloc, struct snd_gf1_mem_block * block)
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{
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if (block->share) { /* ok.. shared block */
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block->share--;
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mutex_unlock(&alloc->memory_mutex);
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return 0;
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}
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if (alloc->first == block) {
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alloc->first = block->next;
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if (block->next)
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block->next->prev = NULL;
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} else {
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block->prev->next = block->next;
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if (block->next)
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block->next->prev = block->prev;
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}
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if (alloc->last == block) {
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alloc->last = block->prev;
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if (block->prev)
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block->prev->next = NULL;
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} else {
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block->next->prev = block->prev;
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if (block->prev)
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block->prev->next = block->next;
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}
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kfree(block->name);
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kfree(block);
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return 0;
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}
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static struct snd_gf1_mem_block *snd_gf1_mem_look(struct snd_gf1_mem * alloc,
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unsigned int address)
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{
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struct snd_gf1_mem_block *block;
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for (block = alloc->first; block; block = block->next) {
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if (block->ptr == address) {
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return block;
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}
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}
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return NULL;
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}
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static struct snd_gf1_mem_block *snd_gf1_mem_share(struct snd_gf1_mem * alloc,
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unsigned int *share_id)
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{
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struct snd_gf1_mem_block *block;
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if (!share_id[0] && !share_id[1] &&
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!share_id[2] && !share_id[3])
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return NULL;
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for (block = alloc->first; block; block = block->next)
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if (!memcmp(share_id, block->share_id,
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sizeof(block->share_id)))
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return block;
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return NULL;
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}
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static int snd_gf1_mem_find(struct snd_gf1_mem * alloc,
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struct snd_gf1_mem_block * block,
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unsigned int size, int w_16, int align)
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{
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struct snd_gf1_bank_info *info = w_16 ? alloc->banks_16 : alloc->banks_8;
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unsigned int idx, boundary;
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int size1;
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struct snd_gf1_mem_block *pblock;
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unsigned int ptr1, ptr2;
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if (w_16 && align < 2)
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align = 2;
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block->flags = w_16 ? SNDRV_GF1_MEM_BLOCK_16BIT : 0;
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block->owner = SNDRV_GF1_MEM_OWNER_DRIVER;
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block->share = 0;
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block->share_id[0] = block->share_id[1] =
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block->share_id[2] = block->share_id[3] = 0;
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block->name = NULL;
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block->prev = block->next = NULL;
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for (pblock = alloc->first, idx = 0; pblock; pblock = pblock->next) {
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while (pblock->ptr >= (boundary = info[idx].address + info[idx].size))
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idx++;
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while (pblock->ptr + pblock->size >= (boundary = info[idx].address + info[idx].size))
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idx++;
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ptr2 = boundary;
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if (pblock->next) {
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if (pblock->ptr + pblock->size == pblock->next->ptr)
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continue;
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if (pblock->next->ptr < boundary)
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ptr2 = pblock->next->ptr;
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}
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ptr1 = ALIGN(pblock->ptr + pblock->size, align);
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if (ptr1 >= ptr2)
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continue;
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size1 = ptr2 - ptr1;
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if ((int)size <= size1) {
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block->ptr = ptr1;
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block->size = size;
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return 0;
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}
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}
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while (++idx < 4) {
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if (size <= info[idx].size) {
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/* I assume that bank address is already aligned.. */
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block->ptr = info[idx].address;
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block->size = size;
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return 0;
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}
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}
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return -ENOMEM;
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}
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struct snd_gf1_mem_block *snd_gf1_mem_alloc(struct snd_gf1_mem * alloc, int owner,
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char *name, int size, int w_16, int align,
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unsigned int *share_id)
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{
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struct snd_gf1_mem_block block, *nblock;
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snd_gf1_mem_lock(alloc, 0);
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if (share_id != NULL) {
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nblock = snd_gf1_mem_share(alloc, share_id);
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if (nblock != NULL) {
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if (size != (int)nblock->size) {
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/* TODO: remove in the future */
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snd_printk(KERN_ERR "snd_gf1_mem_alloc - share: sizes differ\n");
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goto __std;
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}
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nblock->share++;
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snd_gf1_mem_lock(alloc, 1);
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return NULL;
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}
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}
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__std:
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if (snd_gf1_mem_find(alloc, &block, size, w_16, align) < 0) {
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snd_gf1_mem_lock(alloc, 1);
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return NULL;
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}
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if (share_id != NULL)
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memcpy(&block.share_id, share_id, sizeof(block.share_id));
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block.owner = owner;
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block.name = kstrdup(name, GFP_KERNEL);
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nblock = snd_gf1_mem_xalloc(alloc, &block);
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snd_gf1_mem_lock(alloc, 1);
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return nblock;
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}
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int snd_gf1_mem_free(struct snd_gf1_mem * alloc, unsigned int address)
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{
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int result;
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struct snd_gf1_mem_block *block;
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snd_gf1_mem_lock(alloc, 0);
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if ((block = snd_gf1_mem_look(alloc, address)) != NULL) {
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result = snd_gf1_mem_xfree(alloc, block);
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snd_gf1_mem_lock(alloc, 1);
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return result;
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}
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snd_gf1_mem_lock(alloc, 1);
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return -EINVAL;
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}
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int snd_gf1_mem_init(struct snd_gus_card * gus)
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{
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struct snd_gf1_mem *alloc;
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struct snd_gf1_mem_block block;
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#ifdef CONFIG_SND_DEBUG
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struct snd_info_entry *entry;
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#endif
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alloc = &gus->gf1.mem_alloc;
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mutex_init(&alloc->memory_mutex);
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alloc->first = alloc->last = NULL;
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if (!gus->gf1.memory)
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return 0;
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memset(&block, 0, sizeof(block));
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block.owner = SNDRV_GF1_MEM_OWNER_DRIVER;
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if (gus->gf1.enh_mode) {
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block.ptr = 0;
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block.size = 1024;
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block.name = kstrdup("InterWave LFOs", GFP_KERNEL);
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if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
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return -ENOMEM;
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}
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block.ptr = gus->gf1.default_voice_address;
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block.size = 4;
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block.name = kstrdup("Voice default (NULL's)", GFP_KERNEL);
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if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
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return -ENOMEM;
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#ifdef CONFIG_SND_DEBUG
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if (! snd_card_proc_new(gus->card, "gusmem", &entry))
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snd_info_set_text_ops(entry, gus, snd_gf1_mem_info_read);
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#endif
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return 0;
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}
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int snd_gf1_mem_done(struct snd_gus_card * gus)
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{
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struct snd_gf1_mem *alloc;
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struct snd_gf1_mem_block *block, *nblock;
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alloc = &gus->gf1.mem_alloc;
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block = alloc->first;
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while (block) {
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nblock = block->next;
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snd_gf1_mem_xfree(alloc, block);
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block = nblock;
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}
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return 0;
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}
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#ifdef CONFIG_SND_DEBUG
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static void snd_gf1_mem_info_read(struct snd_info_entry *entry,
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struct snd_info_buffer *buffer)
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{
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struct snd_gus_card *gus;
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struct snd_gf1_mem *alloc;
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struct snd_gf1_mem_block *block;
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unsigned int total, used;
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int i;
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gus = entry->private_data;
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alloc = &gus->gf1.mem_alloc;
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mutex_lock(&alloc->memory_mutex);
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snd_iprintf(buffer, "8-bit banks : \n ");
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for (i = 0; i < 4; i++)
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snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_8[i].address, alloc->banks_8[i].size >> 10, i + 1 < 4 ? "," : "");
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snd_iprintf(buffer, "\n"
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"16-bit banks : \n ");
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for (i = total = 0; i < 4; i++) {
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snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_16[i].address, alloc->banks_16[i].size >> 10, i + 1 < 4 ? "," : "");
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total += alloc->banks_16[i].size;
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}
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snd_iprintf(buffer, "\n");
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used = 0;
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for (block = alloc->first, i = 0; block; block = block->next, i++) {
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used += block->size;
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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);
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if (block->share ||
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block->share_id[0] || block->share_id[1] ||
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block->share_id[2] || block->share_id[3])
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snd_iprintf(buffer, " Share : %i [id0 0x%x] [id1 0x%x] [id2 0x%x] [id3 0x%x]\n",
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block->share,
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block->share_id[0], block->share_id[1],
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block->share_id[2], block->share_id[3]);
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snd_iprintf(buffer, " Flags :%s\n",
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block->flags & SNDRV_GF1_MEM_BLOCK_16BIT ? " 16-bit" : "");
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snd_iprintf(buffer, " Owner : ");
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switch (block->owner) {
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case SNDRV_GF1_MEM_OWNER_DRIVER:
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snd_iprintf(buffer, "driver - %s\n", block->name);
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break;
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case SNDRV_GF1_MEM_OWNER_WAVE_SIMPLE:
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snd_iprintf(buffer, "SIMPLE wave\n");
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break;
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case SNDRV_GF1_MEM_OWNER_WAVE_GF1:
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snd_iprintf(buffer, "GF1 wave\n");
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break;
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case SNDRV_GF1_MEM_OWNER_WAVE_IWFFFF:
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snd_iprintf(buffer, "IWFFFF wave\n");
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break;
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default:
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snd_iprintf(buffer, "unknown\n");
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}
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}
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snd_iprintf(buffer, " Total: memory = %i, used = %i, free = %i\n",
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total, used, total - used);
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mutex_unlock(&alloc->memory_mutex);
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#if 0
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ultra_iprintf(buffer, " Verify: free = %i, max 8-bit block = %i, max 16-bit block = %i\n",
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ultra_memory_free_size(card, &card->gf1.mem_alloc),
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ultra_memory_free_block(card, &card->gf1.mem_alloc, 0),
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ultra_memory_free_block(card, &card->gf1.mem_alloc, 1));
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#endif
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}
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#endif
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