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-rw-r--r--Documentation/sound/alsa/ALSA-Configuration.txt1
-rw-r--r--sound/pci/hda/hda_intel.c148
2 files changed, 130 insertions, 19 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 27126c4..936699e 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -891,6 +891,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
access but isn't required by the HDA spec and prevents
users from specifying exact period/buffer sizes.
(default = on)
+ snoop - Enable/disable snooping (default = on)
This module supports multiple cards and autoprobe.
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 2a8bed9..fbf5cfc 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -34,7 +34,6 @@
*
*/
-#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@@ -46,6 +45,12 @@
#include <linux/pci.h>
#include <linux/mutex.h>
#include <linux/reboot.h>
+#include <linux/io.h>
+#ifdef CONFIG_X86
+/* for snoop control */
+#include <asm/pgtable.h>
+#include <asm/cacheflush.h>
+#endif
#include <sound/core.h>
#include <sound/initval.h>
#include "hda_codec.h"
@@ -121,6 +126,17 @@ module_param(align_buffer_size, bool, 0644);
MODULE_PARM_DESC(align_buffer_size,
"Force buffer and period sizes to be multiple of 128 bytes.");
+#ifdef CONFIG_X86
+static bool hda_snoop = true;
+module_param_named(snoop, hda_snoop, bool, 0444);
+MODULE_PARM_DESC(snoop, "Enable/disable snooping");
+#define azx_snoop(chip) (chip)->snoop
+#else
+#define hda_snoop true
+#define azx_snoop(chip) true
+#endif
+
+
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Intel, ICH6},"
"{Intel, ICH6M},"
@@ -376,6 +392,7 @@ struct azx_dev {
* when link position is not greater than FIFO size
*/
unsigned int insufficient :1;
+ unsigned int wc_marked:1;
};
/* CORB/RIRB */
@@ -443,6 +460,7 @@ struct azx {
unsigned int msi :1;
unsigned int irq_pending_warned :1;
unsigned int probing :1; /* codec probing phase */
+ unsigned int snoop:1;
/* for debugging */
unsigned int last_cmd[AZX_MAX_CODECS];
@@ -548,6 +566,45 @@ static char *driver_short_names[] __devinitdata = {
/* for pcm support */
#define get_azx_dev(substream) (substream->runtime->private_data)
+#ifdef CONFIG_X86
+static void __mark_pages_wc(struct azx *chip, void *addr, size_t size, bool on)
+{
+ if (azx_snoop(chip))
+ return;
+ if (addr && size) {
+ int pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ if (on)
+ set_memory_wc((unsigned long)addr, pages);
+ else
+ set_memory_wb((unsigned long)addr, pages);
+ }
+}
+
+static inline void mark_pages_wc(struct azx *chip, struct snd_dma_buffer *buf,
+ bool on)
+{
+ __mark_pages_wc(chip, buf->area, buf->bytes, on);
+}
+static inline void mark_runtime_wc(struct azx *chip, struct azx_dev *azx_dev,
+ struct snd_pcm_runtime *runtime, bool on)
+{
+ if (azx_dev->wc_marked != on) {
+ __mark_pages_wc(chip, runtime->dma_area, runtime->dma_bytes, on);
+ azx_dev->wc_marked = on;
+ }
+}
+#else
+/* NOP for other archs */
+static inline void mark_pages_wc(struct azx *chip, struct snd_dma_buffer *buf,
+ bool on)
+{
+}
+static inline void mark_runtime_wc(struct azx *chip, struct azx_dev *azx_dev,
+ struct snd_pcm_runtime *runtime, bool on)
+{
+}
+#endif
+
static int azx_acquire_irq(struct azx *chip, int do_disconnect);
static int azx_send_cmd(struct hda_bus *bus, unsigned int val);
/*
@@ -569,6 +626,7 @@ static int azx_alloc_cmd_io(struct azx *chip)
snd_printk(KERN_ERR SFX "cannot allocate CORB/RIRB\n");
return err;
}
+ mark_pages_wc(chip, &chip->rb, true);
return 0;
}
@@ -1085,7 +1143,15 @@ static void update_pci_byte(struct pci_dev *pci, unsigned int reg,
static void azx_init_pci(struct azx *chip)
{
- unsigned short snoop;
+ /* force to non-snoop mode for a new VIA controller when BIOS is set */
+ if (chip->snoop && chip->driver_type == AZX_DRIVER_VIA) {
+ u8 snoop;
+ pci_read_config_byte(chip->pci, 0x42, &snoop);
+ if (!(snoop & 0x80) && chip->pci->revision == 0x30) {
+ chip->snoop = 0;
+ snd_printdd(SFX "Force to non-snoop mode\n");
+ }
+ }
/* Clear bits 0-2 of PCI register TCSEL (at offset 0x44)
* TCSEL == Traffic Class Select Register, which sets PCI express QOS
@@ -1102,15 +1168,15 @@ static void azx_init_pci(struct azx *chip)
* we need to enable snoop.
*/
if (chip->driver_caps & AZX_DCAPS_ATI_SNOOP) {
- snd_printdd(SFX "Enabling ATI snoop\n");
+ snd_printdd(SFX "Setting ATI snoop: %d\n", azx_snoop(chip));
update_pci_byte(chip->pci,
- ATI_SB450_HDAUDIO_MISC_CNTR2_ADDR,
- 0x07, ATI_SB450_HDAUDIO_ENABLE_SNOOP);
+ ATI_SB450_HDAUDIO_MISC_CNTR2_ADDR, 0x07,
+ azx_snoop(chip) ? ATI_SB450_HDAUDIO_ENABLE_SNOOP : 0);
}
/* For NVIDIA HDA, enable snoop */
if (chip->driver_caps & AZX_DCAPS_NVIDIA_SNOOP) {
- snd_printdd(SFX "Enabling Nvidia snoop\n");
+ snd_printdd(SFX "Setting Nvidia snoop: %d\n", azx_snoop(chip));
update_pci_byte(chip->pci,
NVIDIA_HDA_TRANSREG_ADDR,
0x0f, NVIDIA_HDA_ENABLE_COHBITS);
@@ -1124,16 +1190,20 @@ static void azx_init_pci(struct azx *chip)
/* Enable SCH/PCH snoop if needed */
if (chip->driver_caps & AZX_DCAPS_SCH_SNOOP) {
+ unsigned short snoop;
pci_read_config_word(chip->pci, INTEL_SCH_HDA_DEVC, &snoop);
- if (snoop & INTEL_SCH_HDA_DEVC_NOSNOOP) {
- pci_write_config_word(chip->pci, INTEL_SCH_HDA_DEVC,
- snoop & (~INTEL_SCH_HDA_DEVC_NOSNOOP));
+ if ((!azx_snoop(chip) && !(snoop & INTEL_SCH_HDA_DEVC_NOSNOOP)) ||
+ (azx_snoop(chip) && (snoop & INTEL_SCH_HDA_DEVC_NOSNOOP))) {
+ snoop &= ~INTEL_SCH_HDA_DEVC_NOSNOOP;
+ if (!azx_snoop(chip))
+ snoop |= INTEL_SCH_HDA_DEVC_NOSNOOP;
+ pci_write_config_word(chip->pci, INTEL_SCH_HDA_DEVC, snoop);
pci_read_config_word(chip->pci,
INTEL_SCH_HDA_DEVC, &snoop);
- snd_printdd(SFX "HDA snoop disabled, enabling ... %s\n",
- (snoop & INTEL_SCH_HDA_DEVC_NOSNOOP)
- ? "Failed" : "OK");
}
+ snd_printdd(SFX "SCH snoop: %s\n",
+ (snoop & INTEL_SCH_HDA_DEVC_NOSNOOP)
+ ? "Disabled" : "Enabled");
}
}
@@ -1340,12 +1410,16 @@ static void azx_stream_reset(struct azx *chip, struct azx_dev *azx_dev)
*/
static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev)
{
+ unsigned int val;
/* make sure the run bit is zero for SD */
azx_stream_clear(chip, azx_dev);
/* program the stream_tag */
- azx_sd_writel(azx_dev, SD_CTL,
- (azx_sd_readl(azx_dev, SD_CTL) & ~SD_CTL_STREAM_TAG_MASK)|
- (azx_dev->stream_tag << SD_CTL_STREAM_TAG_SHIFT));
+ val = azx_sd_readl(azx_dev, SD_CTL);
+ val = (val & ~SD_CTL_STREAM_TAG_MASK) |
+ (azx_dev->stream_tag << SD_CTL_STREAM_TAG_SHIFT);
+ if (!azx_snoop(chip))
+ val |= SD_CTL_TRAFFIC_PRIO;
+ azx_sd_writel(azx_dev, SD_CTL, val);
/* program the length of samples in cyclic buffer */
azx_sd_writel(azx_dev, SD_CBL, azx_dev->bufsize);
@@ -1693,19 +1767,30 @@ static int azx_pcm_close(struct snd_pcm_substream *substream)
static int azx_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
+ struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
+ struct azx *chip = apcm->chip;
+ struct snd_pcm_runtime *runtime = substream->runtime;
struct azx_dev *azx_dev = get_azx_dev(substream);
+ int ret;
+ mark_runtime_wc(chip, azx_dev, runtime, false);
azx_dev->bufsize = 0;
azx_dev->period_bytes = 0;
azx_dev->format_val = 0;
- return snd_pcm_lib_malloc_pages(substream,
+ ret = snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
+ if (ret < 0)
+ return ret;
+ mark_runtime_wc(chip, azx_dev, runtime, true);
+ return ret;
}
static int azx_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
struct azx_dev *azx_dev = get_azx_dev(substream);
+ struct azx *chip = apcm->chip;
+ struct snd_pcm_runtime *runtime = substream->runtime;
struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream];
/* reset BDL address */
@@ -1718,6 +1803,7 @@ static int azx_pcm_hw_free(struct snd_pcm_substream *substream)
snd_hda_codec_cleanup(apcm->codec, hinfo, substream);
+ mark_runtime_wc(chip, azx_dev, runtime, false);
return snd_pcm_lib_free_pages(substream);
}
@@ -2076,6 +2162,20 @@ static void azx_clear_irq_pending(struct azx *chip)
spin_unlock_irq(&chip->reg_lock);
}
+#ifdef CONFIG_X86
+static int azx_pcm_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *area)
+{
+ struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
+ struct azx *chip = apcm->chip;
+ if (!azx_snoop(chip))
+ area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
+ return snd_pcm_lib_default_mmap(substream, area);
+}
+#else
+#define azx_pcm_mmap NULL
+#endif
+
static struct snd_pcm_ops azx_pcm_ops = {
.open = azx_pcm_open,
.close = azx_pcm_close,
@@ -2085,6 +2185,7 @@ static struct snd_pcm_ops azx_pcm_ops = {
.prepare = azx_pcm_prepare,
.trigger = azx_pcm_trigger,
.pointer = azx_pcm_pointer,
+ .mmap = azx_pcm_mmap,
.page = snd_pcm_sgbuf_ops_page,
};
@@ -2365,13 +2466,19 @@ static int azx_free(struct azx *chip)
if (chip->azx_dev) {
for (i = 0; i < chip->num_streams; i++)
- if (chip->azx_dev[i].bdl.area)
+ if (chip->azx_dev[i].bdl.area) {
+ mark_pages_wc(chip, &chip->azx_dev[i].bdl, false);
snd_dma_free_pages(&chip->azx_dev[i].bdl);
+ }
}
- if (chip->rb.area)
+ if (chip->rb.area) {
+ mark_pages_wc(chip, &chip->rb, false);
snd_dma_free_pages(&chip->rb);
- if (chip->posbuf.area)
+ }
+ if (chip->posbuf.area) {
+ mark_pages_wc(chip, &chip->posbuf, false);
snd_dma_free_pages(&chip->posbuf);
+ }
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
kfree(chip->azx_dev);
@@ -2566,6 +2673,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
check_probe_mask(chip, dev);
chip->single_cmd = single_cmd;
+ chip->snoop = hda_snoop;
if (bdl_pos_adj[dev] < 0) {
switch (chip->driver_type) {
@@ -2693,6 +2801,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
snd_printk(KERN_ERR SFX "cannot allocate BDL\n");
goto errout;
}
+ mark_pages_wc(chip, &chip->azx_dev[i].bdl, true);
}
/* allocate memory for the position buffer */
err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
@@ -2702,6 +2811,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
snd_printk(KERN_ERR SFX "cannot allocate posbuf\n");
goto errout;
}
+ mark_pages_wc(chip, &chip->posbuf, true);
/* allocate CORB/RIRB */
err = azx_alloc_cmd_io(chip);
if (err < 0)
generated by cgit v0.10.2 at 2024-10-02 15:15:07 (GMT)