[PATCH 7/14] lemote: Alsa memory maps fixup on mips systems

[PATCH 7/14] lemote: Alsa memory maps fixup on mips systems

[yanhua]

The user application mmap audio dma regions must be dma-coherent
---
sound/core/pcm_native.c | 9 +++++++++
sound/core/sgbuf.c | 8 ++++++++
sound/pci/Kconfig | 1 -
3 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index a789efc..438dd80 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3099,7 +3099,11 @@ static int snd_pcm_mmap_data_fault(struct
vm_area_struct *area,
return VM_FAULT_SIGBUS;
} else {
vaddr = runtime->dma_area + offset;
+#if defined(__mips__) && defined(CONFIG_DMA_NONCOHERENT)
+ page = virt_to_page(CAC_ADDR(vaddr));
+#else
page = virt_to_page(vaddr);
+#endif
}
get_page(page);
vmf->page = page;
@@ -3214,6 +3218,11 @@ static int snd_pcm_mmap(struct file *file, struct
vm_area_struct *area)
if (PCM_RUNTIME_CHECK(substream))
return -ENXIO;

+#if defined(__mips__) && defined(CONFIG_DMA_NONCOHERENT)
+ /* all mmap using uncached mode */
+ area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
+ area->vm_flags |= ( VM_RESERVED | VM_IO);
+#endif
offset = area->vm_pgoff << PAGE_SHIFT;
switch (offset) {
case SNDRV_PCM_MMAP_OFFSET_STATUS:
diff --git a/sound/core/sgbuf.c b/sound/core/sgbuf.c
index 4e7ec2b..977e9ce 100644
--- a/sound/core/sgbuf.c
+++ b/sound/core/sgbuf.c
@@ -114,7 +114,11 @@ void *snd_malloc_sgbuf_pages(struct device *device,
if (!i)
table->addr |= chunk; /* mark head */
table++;
+#if defined(__mips__) && defined(CONFIG_DMA_NONCOHERENT)
+ *pgtable++ = virt_to_page(CAC_ADDR(tmpb.area));
+#else
*pgtable++ = virt_to_page(tmpb.area);
+#endif
tmpb.area += PAGE_SIZE;
tmpb.addr += PAGE_SIZE;
}
@@ -125,7 +129,11 @@ void *snd_malloc_sgbuf_pages(struct device *device,
}

sgbuf->size = size;
+#if defined(__mips__) && defined(CONFIG_DMA_NONCOHERENT)
+ dmab->area = vmap(sgbuf->page_table, sgbuf->pages, VM_MAP | VM_IO,
pgprot_noncached(PAGE_KERNEL));
+#else
dmab->area = vmap(sgbuf->page_table, sgbuf->pages, VM_MAP, PAGE_KERNEL);
+#endif
if (! dmab->area)
goto _failed;
if (res_size)
diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
index 82b9bdd..4ccfae0 100644
--- a/sound/pci/Kconfig
+++ b/sound/pci/Kconfig
@@ -259,7 +259,6 @@ config SND_CS5530

config SND_CS5535AUDIO
tristate "CS5535/CS5536 Audio"
- depends on X86 && !X86_64
select SND_PCM
select SND_AC97_CODEC
help
-- 
1.5.6.5