intel8x0 driver requires the non-cached pages for 440MX workaround, and this can be implemented more easily with the new memalloc type, SNDRV_DMA_TYPE_DEV_UC. This allows us to reduce lots of code.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/pci/intel8x0.c | 89 ++++++-------------------------------------- 1 file changed, 12 insertions(+), 77 deletions(-)
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c index 5ee468d1aefe..9517f9b8f1d4 100644 --- a/sound/pci/intel8x0.c +++ b/sound/pci/intel8x0.c @@ -38,11 +38,6 @@ #include <sound/ac97_codec.h> #include <sound/info.h> #include <sound/initval.h> -/* for 440MX workaround */ -#include <asm/pgtable.h> -#ifdef CONFIG_X86 -#include <asm/set_memory.h> -#endif
MODULE_AUTHOR("Jaroslav Kysela perex@perex.cz"); MODULE_DESCRIPTION("Intel 82801AA,82901AB,i810,i820,i830,i840,i845,MX440; SiS 7012; Ali 5455"); @@ -374,7 +369,6 @@ struct ichdev { unsigned int ali_slot; /* ALI DMA slot */ struct ac97_pcm *pcm; int pcm_open_flag; - unsigned int page_attr_changed: 1; unsigned int suspended: 1; };
@@ -724,25 +718,6 @@ static void snd_intel8x0_setup_periods(struct intel8x0 *chip, struct ichdev *ich iputbyte(chip, port + ichdev->roff_sr, ICH_FIFOE | ICH_BCIS | ICH_LVBCI); }
-#ifdef __i386__ -/* - * Intel 82443MX running a 100MHz processor system bus has a hardware bug, - * which aborts PCI busmaster for audio transfer. A workaround is to set - * the pages as non-cached. For details, see the errata in - * http://download.intel.com/design/chipsets/specupdt/24505108.pdf - */ -static void fill_nocache(void *buf, int size, int nocache) -{ - size = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; - if (nocache) - set_pages_uc(virt_to_page(buf), size); - else - set_pages_wb(virt_to_page(buf), size); -} -#else -#define fill_nocache(buf, size, nocache) do { ; } while (0) -#endif - /* * Interrupt handler */ @@ -938,23 +913,12 @@ static int snd_intel8x0_hw_params(struct snd_pcm_substream *substream, { struct intel8x0 *chip = snd_pcm_substream_chip(substream); struct ichdev *ichdev = get_ichdev(substream); - struct snd_pcm_runtime *runtime = substream->runtime; int dbl = params_rate(hw_params) > 48000; int err;
- if (chip->fix_nocache && ichdev->page_attr_changed) { - fill_nocache(runtime->dma_area, runtime->dma_bytes, 0); /* clear */ - ichdev->page_attr_changed = 0; - } err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); if (err < 0) return err; - if (chip->fix_nocache) { - if (runtime->dma_area && ! ichdev->page_attr_changed) { - fill_nocache(runtime->dma_area, runtime->dma_bytes, 1); - ichdev->page_attr_changed = 1; - } - } if (ichdev->pcm_open_flag) { snd_ac97_pcm_close(ichdev->pcm); ichdev->pcm_open_flag = 0; @@ -974,17 +938,12 @@ static int snd_intel8x0_hw_params(struct snd_pcm_substream *substream,
static int snd_intel8x0_hw_free(struct snd_pcm_substream *substream) { - struct intel8x0 *chip = snd_pcm_substream_chip(substream); struct ichdev *ichdev = get_ichdev(substream);
if (ichdev->pcm_open_flag) { snd_ac97_pcm_close(ichdev->pcm); ichdev->pcm_open_flag = 0; } - if (chip->fix_nocache && ichdev->page_attr_changed) { - fill_nocache(substream->runtime->dma_area, substream->runtime->dma_bytes, 0); - ichdev->page_attr_changed = 0; - } return snd_pcm_lib_free_pages(substream); }
@@ -1510,6 +1469,9 @@ struct ich_pcm_table { int ac97_idx; };
+#define intel8x0_dma_type(chip) \ + ((chip)->fix_nocache ? SNDRV_DMA_TYPE_DEV_UC : SNDRV_DMA_TYPE_DEV) + static int snd_intel8x0_pcm1(struct intel8x0 *chip, int device, struct ich_pcm_table *rec) { @@ -1540,7 +1502,7 @@ static int snd_intel8x0_pcm1(struct intel8x0 *chip, int device, strcpy(pcm->name, chip->card->shortname); chip->pcm[device] = pcm;
- snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, + snd_pcm_lib_preallocate_pages_for_all(pcm, intel8x0_dma_type(chip), snd_dma_pci_data(chip->pci), rec->prealloc_size, rec->prealloc_max_size);
@@ -2629,11 +2591,8 @@ static int snd_intel8x0_free(struct intel8x0 *chip) __hw_end: if (chip->irq >= 0) free_irq(chip->irq, chip); - if (chip->bdbars.area) { - if (chip->fix_nocache) - fill_nocache(chip->bdbars.area, chip->bdbars.bytes, 0); + if (chip->bdbars.area) snd_dma_free_pages(&chip->bdbars); - } if (chip->addr) pci_iounmap(chip->pci, chip->addr); if (chip->bmaddr) @@ -2657,17 +2616,6 @@ static int intel8x0_suspend(struct device *dev) snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); for (i = 0; i < chip->pcm_devs; i++) snd_pcm_suspend_all(chip->pcm[i]); - /* clear nocache */ - if (chip->fix_nocache) { - for (i = 0; i < chip->bdbars_count; i++) { - struct ichdev *ichdev = &chip->ichd[i]; - if (ichdev->substream && ichdev->page_attr_changed) { - struct snd_pcm_runtime *runtime = ichdev->substream->runtime; - if (runtime->dma_area) - fill_nocache(runtime->dma_area, runtime->dma_bytes, 0); - } - } - } for (i = 0; i < chip->ncodecs; i++) snd_ac97_suspend(chip->ac97[i]); if (chip->device_type == DEVICE_INTEL_ICH4) @@ -2708,25 +2656,9 @@ static int intel8x0_resume(struct device *dev) ICH_PCM_SPDIF_1011); }
- /* refill nocache */ - if (chip->fix_nocache) - fill_nocache(chip->bdbars.area, chip->bdbars.bytes, 1); - for (i = 0; i < chip->ncodecs; i++) snd_ac97_resume(chip->ac97[i]);
- /* refill nocache */ - if (chip->fix_nocache) { - for (i = 0; i < chip->bdbars_count; i++) { - struct ichdev *ichdev = &chip->ichd[i]; - if (ichdev->substream && ichdev->page_attr_changed) { - struct snd_pcm_runtime *runtime = ichdev->substream->runtime; - if (runtime->dma_area) - fill_nocache(runtime->dma_area, runtime->dma_bytes, 1); - } - } - } - /* resume status */ for (i = 0; i < chip->bdbars_count; i++) { struct ichdev *ichdev = &chip->ichd[i]; @@ -3057,6 +2989,12 @@ static int snd_intel8x0_create(struct snd_card *card,
chip->inside_vm = snd_intel8x0_inside_vm(pci);
+ /* + * Intel 82443MX running a 100MHz processor system bus has a hardware + * bug, which aborts PCI busmaster for audio transfer. A workaround + * is to set the pages as non-cached. For details, see the errata in + * http://download.intel.com/design/chipsets/specupdt/24505108.pdf + */ if (pci->vendor == PCI_VENDOR_ID_INTEL && pci->device == PCI_DEVICE_ID_INTEL_440MX) chip->fix_nocache = 1; /* enable workaround */ @@ -3128,7 +3066,7 @@ static int snd_intel8x0_create(struct snd_card *card,
/* allocate buffer descriptor lists */ /* the start of each lists must be aligned to 8 bytes */ - if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), + if (snd_dma_alloc_pages(intel8x0_dma_type(chip), snd_dma_pci_data(pci), chip->bdbars_count * sizeof(u32) * ICH_MAX_FRAGS * 2, &chip->bdbars) < 0) { snd_intel8x0_free(chip); @@ -3137,9 +3075,6 @@ static int snd_intel8x0_create(struct snd_card *card, } /* tables must be aligned to 8 bytes here, but the kernel pages are much bigger, so we don't care (on i386) */ - /* workaround for 440MX */ - if (chip->fix_nocache) - fill_nocache(chip->bdbars.area, chip->bdbars.bytes, 1); int_sta_masks = 0; for (i = 0; i < chip->bdbars_count; i++) { ichdev = &chip->ichd[i];