We have a special handling of WC pages on x86, and it's currently
specific to HD-audio. The last forgotten piece was the pgprot setup
for the mmap with WC pages.
This patch moves the pgprot setup for WC pages from HD-audio-specific
mmap callback to the common helper code. It allows us to remove the
superfluous mmap callback in HD-audio and its prepare_mmap
redirection.
Link: https://lore.kernel.org/r/20210804061329.29265-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
static int snd_dma_dev_mmap(struct snd_dma_buffer *dmab,
struct vm_area_struct *area)
{
+#ifdef CONFIG_X86
+ if (dmab->dev.type == SNDRV_DMA_TYPE_DEV_WC)
+ area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
+#endif
return dma_mmap_coherent(dmab->dev.dev, area,
dmab->area, dmab->addr, dmab->bytes);
}
return err;
}
-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 (chip->ops->pcm_mmap_prepare)
- chip->ops->pcm_mmap_prepare(substream, area);
- return snd_pcm_lib_default_mmap(substream, area);
-}
-
static const struct snd_pcm_ops azx_pcm_ops = {
.open = azx_pcm_open,
.close = azx_pcm_close,
.trigger = azx_pcm_trigger,
.pointer = azx_pcm_pointer,
.get_time_info = azx_get_time_info,
- .mmap = azx_pcm_mmap,
};
static void azx_pcm_free(struct snd_pcm *pcm)
struct hda_controller_ops {
/* Disable msi if supported, PCI only */
int (*disable_msi_reset_irq)(struct azx *);
- void (*pcm_mmap_prepare)(struct snd_pcm_substream *substream,
- struct vm_area_struct *area);
/* Check if current position is acceptable */
int (*position_check)(struct azx *chip, struct azx_dev *azx_dev);
/* enable/disable the link power */
return 0;
}
-static void pcm_mmap_prepare(struct snd_pcm_substream *substream,
- struct vm_area_struct *area)
-{
-#ifdef CONFIG_X86
- struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
- struct azx *chip = apcm->chip;
- if (chip->uc_buffer)
- area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
-#endif
-}
-
/* Denylist for skipping the whole probe:
* some HD-audio PCI entries are exposed without any codecs, and such devices
* should be ignored from the beginning.
static const struct hda_controller_ops pci_hda_ops = {
.disable_msi_reset_irq = disable_msi_reset_irq,
- .pcm_mmap_prepare = pcm_mmap_prepare,
.position_check = azx_position_check,
};