+
+/* FIXME: for pci only - other bus? */
+#ifdef CONFIG_PCI
+#define gettoken(bufp) strsep(bufp, " \t\n")
+
+static int snd_mem_proc_write(struct file *file, const char __user *buffer,
+ unsigned long count, void *data)
+{
+ char buf[128];
+ char *token, *p;
+
+ if (count > ARRAY_SIZE(buf) - 1)
+ count = ARRAY_SIZE(buf) - 1;
+ if (copy_from_user(buf, buffer, count))
+ return -EFAULT;
+ buf[ARRAY_SIZE(buf) - 1] = '\0';
+
+ p = buf;
+ token = gettoken(&p);
+ if (! token || *token == '#')
+ return (int)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 (int)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);
+ return (int)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 (int)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 (int)count;
+}
+#endif /* CONFIG_PCI */