MODULE_LICENSE("GPL");
-/*
- */
-
-static DEFINE_MUTEX(list_mutex);
-static LIST_HEAD(mem_list_head);
-
-/* buffer preservation list */
-struct snd_mem_list {
- struct snd_dma_buffer buffer;
- unsigned int id;
- struct list_head list;
-};
-
-/* id for pre-allocated buffers */
-#define SNDRV_DMA_DEVICE_UNUSED (unsigned int)-1
-
/*
*
* Generic memory allocators
}
}
-
-/**
- * snd_dma_get_reserved - get the reserved buffer for the given device
- * @dmab: the buffer allocation record to store
- * @id: the buffer id
- *
- * Looks for the reserved-buffer list and re-uses if the same buffer
- * is found in the list. When the buffer is found, it's removed from the free list.
- *
- * Return: The size of buffer if the buffer is found, or zero if not found.
- */
-size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id)
-{
- struct snd_mem_list *mem;
-
- if (WARN_ON(!dmab))
- return 0;
-
- mutex_lock(&list_mutex);
- list_for_each_entry(mem, &mem_list_head, list) {
- if (mem->id == id &&
- (mem->buffer.dev.dev == NULL || dmab->dev.dev == NULL ||
- ! memcmp(&mem->buffer.dev, &dmab->dev, sizeof(dmab->dev)))) {
- struct device *dev = dmab->dev.dev;
- list_del(&mem->list);
- *dmab = mem->buffer;
- if (dmab->dev.dev == NULL)
- dmab->dev.dev = dev;
- kfree(mem);
- mutex_unlock(&list_mutex);
- return dmab->bytes;
- }
- }
- mutex_unlock(&list_mutex);
- return 0;
-}
-
-/**
- * snd_dma_reserve_buf - reserve the buffer
- * @dmab: the buffer to reserve
- * @id: the buffer id
- *
- * Reserves the given buffer as a reserved buffer.
- *
- * Return: Zero if successful, or a negative code on error.
- */
-int snd_dma_reserve_buf(struct snd_dma_buffer *dmab, unsigned int id)
-{
- struct snd_mem_list *mem;
-
- if (WARN_ON(!dmab))
- return -EINVAL;
- mem = kmalloc(sizeof(*mem), GFP_KERNEL);
- if (! mem)
- return -ENOMEM;
- mutex_lock(&list_mutex);
- mem->buffer = *dmab;
- mem->id = id;
- list_add_tail(&mem->list, &mem_list_head);
- mutex_unlock(&list_mutex);
- return 0;
-}
-
-/*
- * purge all reserved buffers
- */
-static void free_all_reserved_pages(void)
-{
- struct list_head *p;
- struct snd_mem_list *mem;
-
- mutex_lock(&list_mutex);
- while (! list_empty(&mem_list_head)) {
- p = mem_list_head.next;
- mem = list_entry(p, struct snd_mem_list, list);
- list_del(p);
- snd_dma_free_pages(&mem->buffer);
- kfree(mem);
- }
- mutex_unlock(&list_mutex);
-}
-
-
-#ifdef CONFIG_PROC_FS
-/*
- * proc file interface
- */
-#define SND_MEM_PROC_FILE "driver/snd-page-alloc"
-static struct proc_dir_entry *snd_mem_proc;
-
-static int snd_mem_proc_read(struct seq_file *seq, void *offset)
-{
- struct snd_mem_list *mem;
- int devno;
- static char *types[] = { "UNKNOWN", "CONT", "DEV", "DEV-SG" };
-
- mutex_lock(&list_mutex);
- devno = 0;
- list_for_each_entry(mem, &mem_list_head, list) {
- devno++;
- seq_printf(seq, "buffer %d : ID %08x : type %s\n",
- devno, mem->id, types[mem->buffer.dev.type]);
- seq_printf(seq, " addr = 0x%lx, size = %d bytes\n",
- (unsigned long)mem->buffer.addr,
- (int)mem->buffer.bytes);
- }
- mutex_unlock(&list_mutex);
- return 0;
-}
-
-static int snd_mem_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, snd_mem_proc_read, NULL);
-}
-
-/* FIXME: for pci only - other bus? */
-#ifdef CONFIG_PCI
-#define gettoken(bufp) strsep(bufp, " \t\n")
-
-static ssize_t snd_mem_proc_write(struct file *file, const char __user * buffer,
- size_t count, loff_t * ppos)
-{
- char buf[128];
- char *token, *p;
-
- if (count > sizeof(buf) - 1)
- return -EINVAL;
- if (copy_from_user(buf, buffer, count))
- return -EFAULT;
- buf[count] = '\0';
-
- p = buf;
- token = gettoken(&p);
- if (! token || *token == '#')
- return count;
- if (strcmp(token, "add") == 0) {
- char *endp;
- int vendor, device, size, buffers;
- long mask;
- int i, alloced;
- struct pci_dev *pci;
-
- if ((token = gettoken(&p)) == NULL ||
- (vendor = simple_strtol(token, NULL, 0)) <= 0 ||
- (token = gettoken(&p)) == NULL ||
- (device = simple_strtol(token, NULL, 0)) <= 0 ||
- (token = gettoken(&p)) == NULL ||
- (mask = simple_strtol(token, NULL, 0)) < 0 ||
- (token = gettoken(&p)) == NULL ||
- (size = memparse(token, &endp)) < 64*1024 ||
- size > 16*1024*1024 /* too big */ ||
- (token = gettoken(&p)) == NULL ||
- (buffers = simple_strtol(token, NULL, 0)) <= 0 ||
- buffers > 4) {
- printk(KERN_ERR "snd-page-alloc: invalid proc write format\n");
- return count;
- }
- vendor &= 0xffff;
- device &= 0xffff;
-
- alloced = 0;
- pci = NULL;
- while ((pci = pci_get_device(vendor, device, pci)) != NULL) {
- if (mask > 0 && mask < 0xffffffff) {
- if (pci_set_dma_mask(pci, mask) < 0 ||
- pci_set_consistent_dma_mask(pci, mask) < 0) {
- printk(KERN_ERR "snd-page-alloc: cannot set DMA mask %lx for pci %04x:%04x\n", mask, vendor, device);
- pci_dev_put(pci);
- return count;
- }
- }
- for (i = 0; i < buffers; i++) {
- struct snd_dma_buffer dmab;
- memset(&dmab, 0, sizeof(dmab));
- if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
- size, &dmab) < 0) {
- printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size);
- pci_dev_put(pci);
- return count;
- }
- snd_dma_reserve_buf(&dmab, snd_dma_pci_buf_id(pci));
- }
- alloced++;
- }
- if (! alloced) {
- for (i = 0; i < buffers; i++) {
- struct snd_dma_buffer dmab;
- memset(&dmab, 0, sizeof(dmab));
- /* FIXME: We can allocate only in ZONE_DMA
- * without a device pointer!
- */
- if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, NULL,
- size, &dmab) < 0) {
- printk(KERN_ERR "snd-page-alloc: cannot allocate buffer pages (size = %d)\n", size);
- break;
- }
- snd_dma_reserve_buf(&dmab, (unsigned int)((vendor << 16) | device));
- }
- }
- } else if (strcmp(token, "erase") == 0)
- /* FIXME: need for releasing each buffer chunk? */
- free_all_reserved_pages();
- else
- printk(KERN_ERR "snd-page-alloc: invalid proc cmd\n");
- return count;
-}
-#endif /* CONFIG_PCI */
-
-static const struct file_operations snd_mem_proc_fops = {
- .owner = THIS_MODULE,
- .open = snd_mem_proc_open,
- .read = seq_read,
-#ifdef CONFIG_PCI
- .write = snd_mem_proc_write,
-#endif
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-#endif /* CONFIG_PROC_FS */
-
-/*
- * module entry
- */
-
-static int __init snd_mem_init(void)
-{
-#ifdef CONFIG_PROC_FS
- snd_mem_proc = proc_create(SND_MEM_PROC_FILE, 0644, NULL,
- &snd_mem_proc_fops);
-#endif
- return 0;
-}
-
-static void __exit snd_mem_exit(void)
-{
- remove_proc_entry(SND_MEM_PROC_FILE, NULL);
- free_all_reserved_pages();
-}
-
-
-module_init(snd_mem_init)
-module_exit(snd_mem_exit)
-
-
/*
* exports
*/
EXPORT_SYMBOL(snd_dma_alloc_pages_fallback);
EXPORT_SYMBOL(snd_dma_free_pages);
-EXPORT_SYMBOL(snd_dma_get_reserved_buf);
-EXPORT_SYMBOL(snd_dma_reserve_buf);
-
EXPORT_SYMBOL(snd_malloc_pages);
EXPORT_SYMBOL(snd_free_pages);
if (! chip->dma.area)
return;
- snd_dma_reserve_buf(&chip->dma, snd_dma_pci_buf_id(chip->pci));
+ snd_dma_free_pages(&chip->dma);
while ((p = chip->buf_list.next) != &chip->buf_list) {
struct esm_memory *chunk = list_entry(p, struct esm_memory, list);
list_del(p);
chip->dma.dev.type = SNDRV_DMA_TYPE_DEV;
chip->dma.dev.dev = snd_dma_pci_data(chip->pci);
- if (! snd_dma_get_reserved_buf(&chip->dma, snd_dma_pci_buf_id(chip->pci))) {
- err = snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
- snd_dma_pci_data(chip->pci),
- chip->total_bufsize, &chip->dma);
- if (err < 0 || ! chip->dma.area) {
- snd_printk(KERN_ERR "es1968: can't allocate dma pages for size %d\n",
- chip->total_bufsize);
- return -ENOMEM;
- }
- if ((chip->dma.addr + chip->dma.bytes - 1) & ~((1 << 28) - 1)) {
- snd_dma_free_pages(&chip->dma);
- snd_printk(KERN_ERR "es1968: DMA buffer beyond 256MB.\n");
- return -ENOMEM;
- }
+ err = snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
+ snd_dma_pci_data(chip->pci),
+ chip->total_bufsize, &chip->dma);
+ if (err < 0 || ! chip->dma.area) {
+ snd_printk(KERN_ERR "es1968: can't allocate dma pages for size %d\n",
+ chip->total_bufsize);
+ return -ENOMEM;
+ }
+ if ((chip->dma.addr + chip->dma.bytes - 1) & ~((1 << 28) - 1)) {
+ snd_dma_free_pages(&chip->dma);
+ snd_printk(KERN_ERR "es1968: DMA buffer beyond 256MB.\n");
+ return -ENOMEM;
}
INIT_LIST_HEAD(&chip->buf_list);
projects / karo-tx-linux.git / commitdiff