leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[ALSA] hda-intel - Use SG buffer

Browse Source 
Use SG buffers for the HD-audio instead of linear buffers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2008-02-06 14:50:19 +01:00
parent b76c850fbc
commit 4ce107b990
1 changed files with 71 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

114
sound/pci/hda/hda_intel.c
View File

@ -206,8 +206,9 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
#define MAX_AZX_DEV 16
/* max number of fragments - we may use more if allocating more pages for BDL */
#define BDL_SIZE PAGE_ALIGN(8192)
#define AZX_MAX_FRAG (BDL_SIZE / (MAX_AZX_DEV * 16))
#define BDL_SIZE 4096
#define AZX_MAX_BDL_ENTRIES (BDL_SIZE / 16)
#define AZX_MAX_FRAG 32
/* max buffer size - no h/w limit, you can increase as you like */
#define AZX_MAX_BUF_SIZE (1024*1024*1024)
/* max number of PCM devics per card */
@ -282,12 +283,10 @@ enum {
*/
struct azx_dev {
u32 *bdl; /* virtual address of the BDL */
dma_addr_t bdl_addr; /* physical address of the BDL */
struct snd_dma_buffer bdl; /* BDL buffer */
u32 *posbuf; /* position buffer pointer */
unsigned int bufsize; /* size of the play buffer in bytes */
unsigned int fragsize; /* size of each period in bytes */
unsigned int frags; /* number for period in the play buffer */
unsigned int fifo_size; /* FIFO size */
@ -358,8 +357,7 @@ struct azx {
struct azx_rb corb;
struct azx_rb rirb;
/* BDL, CORB/RIRB and position buffers */
struct snd_dma_buffer bdl;
/* CORB/RIRB and position buffers */
struct snd_dma_buffer rb;
struct snd_dma_buffer posbuf;
@ -962,30 +960,57 @@ static irqreturn_t azx_interrupt(int irq, void *dev_id)
/*
* set up BDL entries
*/
static void azx_setup_periods(struct azx_dev *azx_dev)
static int azx_setup_periods(struct snd_pcm_substream *substream,
struct azx_dev *azx_dev)
{
u32 *bdl = azx_dev->bdl;
dma_addr_t dma_addr = azx_dev->substream->runtime->dma_addr;
int idx;
struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
u32 *bdl;
int i, ofs, periods, period_bytes;
/* reset BDL address */
azx_sd_writel(azx_dev, SD_BDLPL, 0);
azx_sd_writel(azx_dev, SD_BDLPU, 0);
period_bytes = snd_pcm_lib_period_bytes(substream);
periods = azx_dev->bufsize / period_bytes;
/* program the initial BDL entries */
for (idx = 0; idx < azx_dev->frags; idx++) {
unsigned int off = idx << 2; /* 4 dword step */
dma_addr_t addr = dma_addr + idx * azx_dev->fragsize;
/* program the address field of the BDL entry */
bdl[off] = cpu_to_le32((u32)addr);
bdl[off+1] = cpu_to_le32(upper_32bit(addr));
/* program the size field of the BDL entry */
bdl[off+2] = cpu_to_le32(azx_dev->fragsize);
/* program the IOC to enable interrupt when buffer completes */
bdl[off+3] = cpu_to_le32(0x01);
bdl = (u32 *)azx_dev->bdl.area;
ofs = 0;
azx_dev->frags = 0;
for (i = 0; i < periods; i++) {
int size, rest;
if (i >= AZX_MAX_BDL_ENTRIES) {
snd_printk(KERN_ERR "Too many BDL entries: "
"buffer=%d, period=%d\n",
azx_dev->bufsize, period_bytes);
/* reset */
azx_sd_writel(azx_dev, SD_BDLPL, 0);
azx_sd_writel(azx_dev, SD_BDLPU, 0);
return -EINVAL;
}
rest = period_bytes;
do {
dma_addr_t addr = snd_pcm_sgbuf_get_addr(sgbuf, ofs);
/* program the address field of the BDL entry */
bdl[0] = cpu_to_le32((u32)addr);
bdl[1] = cpu_to_le32(upper_32bit(addr));
/* program the size field of the BDL entry */
size = PAGE_SIZE - (ofs % PAGE_SIZE);
if (rest < size)
size = rest;
bdl[2] = cpu_to_le32(size);
/* program the IOC to enable interrupt
* only when the whole fragment is processed
*/
rest -= size;
bdl[3] = rest ? 0 : cpu_to_le32(0x01);
bdl += 4;
azx_dev->frags++;
ofs += size;
} while (rest > 0);
}
return 0;
}
/*
@ -1034,9 +1059,9 @@ static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev)
/* program the BDL address */
/* lower BDL address */
azx_sd_writel(azx_dev, SD_BDLPL, (u32)azx_dev->bdl_addr);
azx_sd_writel(azx_dev, SD_BDLPL, (u32)azx_dev->bdl.addr);
/* upper BDL address */
azx_sd_writel(azx_dev, SD_BDLPU, upper_32bit(azx_dev->bdl_addr));
azx_sd_writel(azx_dev, SD_BDLPU, upper_32bit(azx_dev->bdl.addr));
/* enable the position buffer */
if (!(azx_readl(chip, DPLBASE) & ICH6_DPLBASE_ENABLE))
@ -1272,8 +1297,6 @@ static int azx_pcm_prepare(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
azx_dev->bufsize = snd_pcm_lib_buffer_bytes(substream);
azx_dev->fragsize = snd_pcm_lib_period_bytes(substream);
azx_dev->frags = azx_dev->bufsize / azx_dev->fragsize;
azx_dev->format_val = snd_hda_calc_stream_format(runtime->rate,
runtime->channels,
runtime->format,
@ -1288,7 +1311,8 @@ static int azx_pcm_prepare(struct snd_pcm_substream *substream)
snd_printdd("azx_pcm_prepare: bufsize=0x%x, fragsize=0x%x, "
"format=0x%x\n",
azx_dev->bufsize, azx_dev->fragsize, azx_dev->format_val);
azx_setup_periods(azx_dev);
if (azx_setup_periods(substream, azx_dev) < 0)
return -EINVAL;
azx_setup_controller(chip, azx_dev);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
azx_dev->fifo_size = azx_sd_readw(azx_dev, SD_FIFOSIZE) + 1;
@ -1375,6 +1399,7 @@ static struct snd_pcm_ops azx_pcm_ops = {
.prepare = azx_pcm_prepare,
.trigger = azx_pcm_trigger,
.pointer = azx_pcm_pointer,
.page = snd_pcm_sgbuf_ops_page,
};
static void azx_pcm_free(struct snd_pcm *pcm)
@ -1417,7 +1442,7 @@ static int __devinit create_codec_pcm(struct azx *chip, struct hda_codec *codec,
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &azx_pcm_ops);
if (cpcm->stream[1].substreams)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &azx_pcm_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(chip->pci),
1024 * 64, 1024 * 1024);
chip->pcm[cpcm->device] = pcm;
@ -1507,10 +1532,7 @@ static int __devinit azx_init_stream(struct azx *chip)
* and initialize
*/
for (i = 0; i < chip->num_streams; i++) {
unsigned int off = sizeof(u32) * (i * AZX_MAX_FRAG * 4);
struct azx_dev *azx_dev = &chip->azx_dev[i];
azx_dev->bdl = (u32 *)(chip->bdl.area + off);
azx_dev->bdl_addr = chip->bdl.addr + off;
azx_dev->posbuf = (u32 __iomem *)(chip->posbuf.area + i * 8);
/* offset: SDI0=0x80, SDI1=0xa0, ... SDO3=0x160 */
azx_dev->sd_addr = chip->remap_addr + (0x20 * i + 0x80);
@ -1646,8 +1668,9 @@ static int azx_resume(struct pci_dev *pci)
*/
static int azx_free(struct azx *chip)
{
int i;
if (chip->initialized) {
int i;
for (i = 0; i < chip->num_streams; i++)
azx_stream_stop(chip, &chip->azx_dev[i]);
azx_stop_chip(chip);
@ -1662,8 +1685,11 @@ static int azx_free(struct azx *chip)
if (chip->remap_addr)
iounmap(chip->remap_addr);
if (chip->bdl.area)
snd_dma_free_pages(&chip->bdl);
if (chip->azx_dev) {
for (i = 0; i < chip->num_streams; i++)
if (chip->azx_dev[i].bdl.area)
snd_dma_free_pages(&chip->azx_dev[i].bdl);
}
if (chip->rb.area)
snd_dma_free_pages(&chip->rb);
if (chip->posbuf.area)
@ -1745,7 +1771,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
struct azx **rchip)
{
struct azx *chip;
int err;
int i, err;
unsigned short gcap;
static struct snd_device_ops ops = {
.dev_free = azx_dev_free,
@ -1857,13 +1883,15 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
goto errout;
}
/* allocate memory for the BDL for each stream */
err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci),
BDL_SIZE, &chip->bdl);
if (err < 0) {
snd_printk(KERN_ERR SFX "cannot allocate BDL\n");
goto errout;
for (i = 0; i < chip->num_streams; i++) {
/* allocate memory for the BDL for each stream */
err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci),
BDL_SIZE, &chip->azx_dev[i].bdl);
if (err < 0) {
snd_printk(KERN_ERR SFX "cannot allocate BDL\n");
goto errout;
}
}
/* allocate memory for the position buffer */
err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,