ALSA: ctxfi - Support SG-buffers

Use SG-buffers instead of contiguous pages.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 22 insertions, 34 deletions

diff --git a/sound/pci/ctxfi/ctvmem.c b/sound/pci/ctxfi/ctvmem.c
index 74a03623d047..b7f8e58ae07d 100644
--- a/sound/pci/ctxfi/ctvmem.c
+++ b/sound/pci/ctxfi/ctvmem.c
@@ -19,7 +19,7 @@
 #include <linux/slab.h>
 #include <linux/mm.h>
 #include <linux/io.h>
-#include <asm/pgtable.h>
+#include <sound/pcm.h>
 
 #define CT_PTES_PER_PAGE (CT_PAGE_SIZE / sizeof(void *))
 #define CT_ADDRS_PER_PAGE (CT_PTES_PER_PAGE * CT_PAGE_SIZE)
@@ -34,6 +34,13 @@ get_vm_block(struct ct_vm *vm, unsigned int size)
         struct ct_vm_block *block = NULL, *entry = NULL;
         struct list_head *pos = NULL;
 
+        size = CT_PAGE_ALIGN(size);
+        if (size > vm->size) {
+                printk(KERN_ERR "ctxfi: Fail! No sufficient device virtural "
+                                  "memory space available!\n");
+                return NULL;
+        }
+
         mutex_lock(&vm->lock);
         list_for_each(pos, &vm->unused) {
                 entry = list_entry(pos, struct ct_vm_block, list);
@@ -73,6 +80,8 @@ static void put_vm_block(struct ct_vm *vm, struct ct_vm_block *block)
         struct ct_vm_block *entry = NULL, *pre_ent = NULL;
         struct list_head *pos = NULL, *pre = NULL;
 
+        block->size = CT_PAGE_ALIGN(block->size);
+
         mutex_lock(&vm->lock);
         list_del(&block->list);
         vm->size += block->size;
@@ -115,57 +124,36 @@ static void put_vm_block(struct ct_vm *vm, struct ct_vm_block *block)
 
 /* Map host addr (kmalloced/vmalloced) to device logical addr. */
 static struct ct_vm_block *
-ct_vm_map(struct ct_vm *vm, void *host_addr, int size)
+ct_vm_map(struct ct_vm *vm, struct snd_pcm_substream *substream, int size)
 {
-        struct ct_vm_block *block = NULL;
-        unsigned long pte_start;
-        unsigned long i;
-        unsigned long pages;
-        unsigned long start_phys;
+        struct ct_vm_block *block;
+        unsigned int pte_start;
+        unsigned i, pages;
         unsigned long *ptp;
 
-        /* do mapping */
-        if ((unsigned long)host_addr >= VMALLOC_START) {
-                printk(KERN_ERR "ctxfi: "
-                       "Fail! Not support vmalloced addr now!\n");
-                return NULL;
-        }
-
-        if (size > vm->size) {
-                printk(KERN_ERR "ctxfi: Fail! No sufficient device virtural "
-                                  "memory space available!\n");
-                return NULL;
-        }
-
-        start_phys = (virt_to_phys(host_addr) & CT_PAGE_MASK);
-        pages = (CT_PAGE_ALIGN(virt_to_phys(host_addr) + size)
-                        - start_phys) >> CT_PAGE_SHIFT;
-
-        ptp = vm->ptp[0];
-
-        block = get_vm_block(vm, (pages << CT_PAGE_SHIFT));
+        block = get_vm_block(vm, size);
         if (block == NULL) {
                 printk(KERN_ERR "ctxfi: No virtual memory block that is big "
                                   "enough to allocate!\n");
                 return NULL;
         }
 
+        ptp = vm->ptp[0];
         pte_start = (block->addr >> CT_PAGE_SHIFT);
-        for (i = 0; i < pages; i++)
-                ptp[pte_start+i] = start_phys + (i << CT_PAGE_SHIFT);
+        pages = block->size >> CT_PAGE_SHIFT;
+        for (i = 0; i < pages; i++) {
+                unsigned long addr;
+                addr = snd_pcm_sgbuf_get_addr(substream, i << CT_PAGE_SHIFT);
+                ptp[pte_start + i] = addr;
+        }
 
-        block->addr += (virt_to_phys(host_addr) & (~CT_PAGE_MASK));
         block->size = size;
-
         return block;
 }
 
 static void ct_vm_unmap(struct ct_vm *vm, struct ct_vm_block *block)
 {
         /* do unmapping */
-        block->size = ((block->addr + block->size + CT_PAGE_SIZE - 1)
-                        & CT_PAGE_MASK) - (block->addr & CT_PAGE_MASK);
-        block->addr &= CT_PAGE_MASK;
         put_vm_block(vm, block);
 }