return (__force gfp_t)(unsigned long)dmab->dev.dev;
}
-static int __snd_dma_alloc_pages(struct snd_dma_buffer *dmab, size_t size)
+static void *__snd_dma_alloc_pages(struct snd_dma_buffer *dmab, size_t size)
{
const struct snd_malloc_ops *ops = snd_dma_get_ops(dmab);
if (WARN_ON_ONCE(!ops || !ops->alloc))
- return -EINVAL;
+ return NULL;
return ops->alloc(dmab, size);
}
int snd_dma_alloc_pages(int type, struct device *device, size_t size,
struct snd_dma_buffer *dmab)
{
- int err;
-
if (WARN_ON(!size))
return -ENXIO;
if (WARN_ON(!dmab))
dmab->dev.type = type;
dmab->dev.dev = device;
dmab->bytes = 0;
- dmab->area = NULL;
dmab->addr = 0;
dmab->private_data = NULL;
- err = __snd_dma_alloc_pages(dmab, size);
- if (err < 0)
- return err;
+ dmab->area = __snd_dma_alloc_pages(dmab, size);
if (!dmab->area)
return -ENOMEM;
dmab->bytes = size;
}
EXPORT_SYMBOL(snd_dma_free_pages);
+/* called by devres */
+static void __snd_release_pages(struct device *dev, void *res)
+{
+ snd_dma_free_pages(res);
+}
+
+/**
+ * snd_devm_alloc_pages - allocate the buffer and manage with devres
+ * @dev: the device pointer
+ * @type: the DMA buffer type
+ * @size: the buffer size to allocate
+ *
+ * Allocate buffer pages depending on the given type and manage using devres.
+ * The pages will be released automatically at the device removal.
+ *
+ * Unlike snd_dma_alloc_pages(), this function requires the real device pointer,
+ * hence it can't work with SNDRV_DMA_TYPE_CONTINUOUS or
+ * SNDRV_DMA_TYPE_VMALLOC type.
+ *
+ * The function returns the snd_dma_buffer object at success, or NULL if failed.
+ */
+struct snd_dma_buffer *
+snd_devm_alloc_pages(struct device *dev, int type, size_t size)
+{
+ struct snd_dma_buffer *dmab;
+ int err;
+
+ if (WARN_ON(type == SNDRV_DMA_TYPE_CONTINUOUS ||
+ type == SNDRV_DMA_TYPE_VMALLOC))
+ return NULL;
+
+ dmab = devres_alloc(__snd_release_pages, sizeof(*dmab), GFP_KERNEL);
+ if (!dmab)
+ return NULL;
+
+ err = snd_dma_alloc_pages(type, dev, size, dmab);
+ if (err < 0) {
+ devres_free(dmab);
+ return NULL;
+ }
+
+ devres_add(dev, dmab);
+ return dmab;
+}
+EXPORT_SYMBOL_GPL(snd_devm_alloc_pages);
+
/**
* snd_dma_buffer_mmap - perform mmap of the given DMA buffer
* @dmab: buffer allocation information
/*
* Continuous pages allocator
*/
-static int snd_dma_continuous_alloc(struct snd_dma_buffer *dmab, size_t size)
+static void *snd_dma_continuous_alloc(struct snd_dma_buffer *dmab, size_t size)
{
gfp_t gfp = snd_mem_get_gfp_flags(dmab, GFP_KERNEL);
+ void *p = alloc_pages_exact(size, gfp);
- dmab->area = alloc_pages_exact(size, gfp);
- return 0;
+ if (p)
+ dmab->addr = page_to_phys(virt_to_page(p));
+ return p;
}
static void snd_dma_continuous_free(struct snd_dma_buffer *dmab)
/*
* VMALLOC allocator
*/
-static int snd_dma_vmalloc_alloc(struct snd_dma_buffer *dmab, size_t size)
+static void *snd_dma_vmalloc_alloc(struct snd_dma_buffer *dmab, size_t size)
{
gfp_t gfp = snd_mem_get_gfp_flags(dmab, GFP_KERNEL | __GFP_HIGHMEM);
- dmab->area = __vmalloc(size, gfp);
- return 0;
+ return __vmalloc(size, gfp);
}
static void snd_dma_vmalloc_free(struct snd_dma_buffer *dmab)
return remap_vmalloc_range(area, dmab->area, 0);
}
+#define get_vmalloc_page_addr(dmab, offset) \
+ page_to_phys(vmalloc_to_page((dmab)->area + (offset)))
+
static dma_addr_t snd_dma_vmalloc_get_addr(struct snd_dma_buffer *dmab,
size_t offset)
{
- return page_to_phys(vmalloc_to_page(dmab->area + offset)) +
- offset % PAGE_SIZE;
+ return get_vmalloc_page_addr(dmab, offset) + offset % PAGE_SIZE;
}
static struct page *snd_dma_vmalloc_get_page(struct snd_dma_buffer *dmab,
snd_dma_vmalloc_get_chunk_size(struct snd_dma_buffer *dmab,
unsigned int ofs, unsigned int size)
{
- ofs %= PAGE_SIZE;
- size += ofs;
- if (size > PAGE_SIZE)
- size = PAGE_SIZE;
- return size - ofs;
+ unsigned int start, end;
+ unsigned long addr;
+
+ start = ALIGN_DOWN(ofs, PAGE_SIZE);
+ end = ofs + size - 1; /* the last byte address */
+ /* check page continuity */
+ addr = get_vmalloc_page_addr(dmab, start);
+ for (;;) {
+ start += PAGE_SIZE;
+ if (start > end)
+ break;
+ addr += PAGE_SIZE;
+ if (get_vmalloc_page_addr(dmab, start) != addr)
+ return start - ofs;
+ }
+ /* ok, all on continuous pages */
+ return size;
}
static const struct snd_malloc_ops snd_dma_vmalloc_ops = {
* IRAM allocator
*/
#ifdef CONFIG_GENERIC_ALLOCATOR
-static int snd_dma_iram_alloc(struct snd_dma_buffer *dmab, size_t size)
+static void *snd_dma_iram_alloc(struct snd_dma_buffer *dmab, size_t size)
{
struct device *dev = dmab->dev.dev;
struct gen_pool *pool;
+ void *p;
if (dev->of_node) {
pool = of_gen_pool_get(dev->of_node, "iram", 0);
/* Assign the pool into private_data field */
dmab->private_data = pool;
- dmab->area = gen_pool_dma_alloc_align(pool, size, &dmab->addr,
- PAGE_SIZE);
- if (dmab->area)
- return 0;
+ p = gen_pool_dma_alloc_align(pool, size, &dmab->addr, PAGE_SIZE);
+ if (p)
+ return p;
}
/* Internal memory might have limited size and no enough space,
};
#endif /* CONFIG_GENERIC_ALLOCATOR */
+#define DEFAULT_GFP \
+ (GFP_KERNEL | \
+ __GFP_COMP | /* compound page lets parts be mapped */ \
+ __GFP_NORETRY | /* don't trigger OOM-killer */ \
+ __GFP_NOWARN) /* no stack trace print - this call is non-critical */
+
/*
* Coherent device pages allocator
*/
-static int snd_dma_dev_alloc(struct snd_dma_buffer *dmab, size_t size)
+static void *snd_dma_dev_alloc(struct snd_dma_buffer *dmab, size_t size)
{
- gfp_t gfp_flags;
-
- gfp_flags = GFP_KERNEL
- | __GFP_COMP /* compound page lets parts be mapped */
- | __GFP_NORETRY /* don't trigger OOM-killer */
- | __GFP_NOWARN; /* no stack trace print - this call is non-critical */
- dmab->area = dma_alloc_coherent(dmab->dev.dev, size, &dmab->addr,
- gfp_flags);
+ void *p;
+
+ p = dma_alloc_coherent(dmab->dev.dev, size, &dmab->addr, DEFAULT_GFP);
#ifdef CONFIG_X86
- if (dmab->area && dmab->dev.type == SNDRV_DMA_TYPE_DEV_UC)
- set_memory_wc((unsigned long)dmab->area,
- PAGE_ALIGN(size) >> PAGE_SHIFT);
+ if (p && dmab->dev.type == SNDRV_DMA_TYPE_DEV_WC)
+ set_memory_wc((unsigned long)p, PAGE_ALIGN(size) >> PAGE_SHIFT);
#endif
- return 0;
+ return p;
}
static void snd_dma_dev_free(struct snd_dma_buffer *dmab)
{
#ifdef CONFIG_X86
- if (dmab->dev.type == SNDRV_DMA_TYPE_DEV_UC)
+ if (dmab->dev.type == SNDRV_DMA_TYPE_DEV_WC)
set_memory_wb((unsigned long)dmab->area,
PAGE_ALIGN(dmab->bytes) >> PAGE_SHIFT);
#endif
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);
}
.free = snd_dma_dev_free,
.mmap = snd_dma_dev_mmap,
};
+
+/*
+ * Write-combined pages
+ */
+#ifdef CONFIG_X86
+/* On x86, share the same ops as the standard dev ops */
+#define snd_dma_wc_ops snd_dma_dev_ops
+#else /* CONFIG_X86 */
+static void *snd_dma_wc_alloc(struct snd_dma_buffer *dmab, size_t size)
+{
+ return dma_alloc_wc(dmab->dev.dev, size, &dmab->addr, DEFAULT_GFP);
+}
+
+static void snd_dma_wc_free(struct snd_dma_buffer *dmab)
+{
+ dma_free_wc(dmab->dev.dev, dmab->bytes, dmab->area, dmab->addr);
+}
+
+static int snd_dma_wc_mmap(struct snd_dma_buffer *dmab,
+ struct vm_area_struct *area)
+{
+ return dma_mmap_wc(dmab->dev.dev, area,
+ dmab->area, dmab->addr, dmab->bytes);
+}
+
+static const struct snd_malloc_ops snd_dma_wc_ops = {
+ .alloc = snd_dma_wc_alloc,
+ .free = snd_dma_wc_free,
+ .mmap = snd_dma_wc_mmap,
+};
+#endif /* CONFIG_X86 */
#endif /* CONFIG_HAS_DMA */
/*
[SNDRV_DMA_TYPE_VMALLOC] = &snd_dma_vmalloc_ops,
#ifdef CONFIG_HAS_DMA
[SNDRV_DMA_TYPE_DEV] = &snd_dma_dev_ops,
- [SNDRV_DMA_TYPE_DEV_UC] = &snd_dma_dev_ops,
+ [SNDRV_DMA_TYPE_DEV_WC] = &snd_dma_wc_ops,
#ifdef CONFIG_GENERIC_ALLOCATOR
[SNDRV_DMA_TYPE_DEV_IRAM] = &snd_dma_iram_ops,
#endif /* CONFIG_GENERIC_ALLOCATOR */
#endif /* CONFIG_HAS_DMA */
#ifdef CONFIG_SND_DMA_SGBUF
[SNDRV_DMA_TYPE_DEV_SG] = &snd_dma_sg_ops,
- [SNDRV_DMA_TYPE_DEV_UC_SG] = &snd_dma_sg_ops,
+ [SNDRV_DMA_TYPE_DEV_WC_SG] = &snd_dma_sg_ops,
#endif
};
projects / linux-2.6-microblaze.git / blobdiff