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ALSA: ctxfi - Support SG-buffers

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Use SG-buffers instead of contiguous pages.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-06-02 15:26:19 +02:00
parent cd391e206f
commit c76157d928
4 changed files with 30 additions and 37 deletions
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2
sound/pci/ctxfi/ctatc.c
View File

@ -128,7 +128,7 @@ static int ct_map_audio_buffer(struct ct_atc *atc, struct ct_atc_pcm *apcm)
runtime = apcm->substream->runtime;
vm = atc->vm;
apcm->vm_block = vm->map(vm, runtime->dma_area, runtime->dma_bytes);
apcm->vm_block = vm->map(vm, apcm->substream, runtime->dma_bytes);
if (NULL == apcm->vm_block)
return -ENOENT;

4
sound/pci/ctxfi/ctpcm.c
View File

@ -442,6 +442,7 @@ static struct snd_pcm_ops ct_pcm_playback_ops = {
.prepare = ct_pcm_playback_prepare,
.trigger = ct_pcm_playback_trigger,
.pointer = ct_pcm_playback_pointer,
.page = snd_pcm_sgbuf_ops_page,
};
/* PCM operators for capture */
@ -454,6 +455,7 @@ static struct snd_pcm_ops ct_pcm_capture_ops = {
.prepare = ct_pcm_capture_prepare,
.trigger = ct_pcm_capture_trigger,
.pointer = ct_pcm_capture_pointer,
.page = snd_pcm_sgbuf_ops_page,
};
/* Create ALSA pcm device */
@ -485,7 +487,7 @@ int ct_alsa_pcm_create(struct ct_atc *atc,
snd_pcm_set_ops(pcm,
SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
return 0;

56
sound/pci/ctxfi/ctvmem.c
View File

@ -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);
}

5
sound/pci/ctxfi/ctvmem.h
View File

@ -37,6 +37,8 @@ struct ct_vm_block {
struct list_head list;
};
struct snd_pcm_substream;
/* Virtual memory management object for card device */
struct ct_vm {
void *ptp[CT_PTP_NUM]; /* Device page table pages */
@ -46,7 +48,8 @@ struct ct_vm {
struct mutex lock;
/* Map host addr (kmalloced/vmalloced) to device logical addr. */
struct ct_vm_block *(*map)(struct ct_vm *, void *host_addr, int size);
struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *,
int size);
/* Unmap device logical addr area. */
void (*unmap)(struct ct_vm *, struct ct_vm_block *block);
void *(*get_ptp_virt)(struct ct_vm *vm, int index);