C++ (Cpp) dma_alloc_from_coherent Examples

Example #1

File: dma-default.c Project: card2000/VDLinux_2.6.35.11

void *dma_alloc_coherent(struct device *dev, size_t size,
	dma_addr_t * dma_handle, gfp_t gfp)
{
#ifdef CONFIG_MSTAR_CHIP
	extern int hw_coherentio;
#endif
	void *ret;

	if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
		return ret;

	gfp = massage_gfp_flags(dev, gfp);

	ret = (void *) __get_free_pages(gfp, get_order(size));

	if (ret) {
		memset(ret, 0, size);
		*dma_handle = plat_map_dma_mem(dev, ret, size);

		if (!plat_device_is_coherent(dev)) {
			dma_cache_wback_inv((unsigned long) ret, size);
#ifdef CONFIG_MSTAR_CHIP
			if (!hw_coherentio)
#endif
			ret = UNCAC_ADDR(ret);
		}
	}

	return ret;
}

Example #2

File: pci-dma.c Project: JcShang/linux-80211n-csitool

void *dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,
		      gfp_t gfp, struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = get_dma_ops(dev);
	void *memory;

	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);

	if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
		return memory;

	if (!dev)
		dev = &x86_dma_fallback_dev;

	if (!is_device_dma_capable(dev))
		return NULL;

	if (!ops->alloc)
		return NULL;

	memory = ops->alloc(dev, size, dma_handle,
			    dma_alloc_coherent_gfp_flags(dev, gfp), attrs);
	debug_dma_alloc_coherent(dev, size, *dma_handle, memory);

	return memory;
}

Example #3

File: dma-octeon.c Project: Core2idiot/Kernel-Samsung-3.0...-

static void *octeon_dma_alloc_coherent(struct device *dev, size_t size,
	dma_addr_t *dma_handle, gfp_t gfp)
{
	void *ret;

	if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
		return ret;

	/* ignore region specifiers */
	gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM);

#ifdef CONFIG_ZONE_DMA
	if (dev == NULL)
		gfp |= __GFP_DMA;
	else if (dev->coherent_dma_mask <= DMA_BIT_MASK(24))
		gfp |= __GFP_DMA;
	else
#endif
#ifdef CONFIG_ZONE_DMA32
	     if (dev->coherent_dma_mask <= DMA_BIT_MASK(32))
		gfp |= __GFP_DMA32;
	else
#endif
		;

	/* Don't invoke OOM killer */
	gfp |= __GFP_NORETRY;

	ret = swiotlb_alloc_coherent(dev, size, dma_handle, gfp);

	mb();

	return ret;
}

Example #4

File: dma-default.c Project: 212006949/linux

static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
	dma_addr_t * dma_handle, gfp_t gfp, struct dma_attrs *attrs)
{
	void *ret;

	if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
		return ret;

	gfp = massage_gfp_flags(dev, gfp);

	ret = (void *) __get_free_pages(gfp, get_order(size));

	if (ret) {
		memset(ret, 0, size);
		*dma_handle = plat_map_dma_mem(dev, ret, size);

		if (!plat_device_is_coherent(dev)) {
			dma_cache_wback_inv((unsigned long) ret, size);
			if (!hw_coherentio)
				ret = UNCAC_ADDR(ret);
		}
	}

	return ret;
}

Example #5

static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
	dma_addr_t * dma_handle, gfp_t gfp)
{
	void *ret;

	if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
		return ret;

	gfp = massage_gfp_flags(dev, gfp);

	ret = (void *) __get_free_pages(gfp, get_order(size));

	if (ret) {
		memset(ret, 0, size);
		*dma_handle = plat_map_dma_mem(dev, ret, size);

		if (!plat_device_is_coherent(dev)) {
			dma_cache_wback_inv((unsigned long) ret, size);
#ifdef CONFIG_BRCM_CONSISTENT_DMA
			if (brcm_map_coherent(*dma_handle, ret, PFN_ALIGN(size),
					&ret, gfp)) {
				free_pages((unsigned long)ret, size);
				ret = NULL;
			}
#else
			ret = UNCAC_ADDR(ret);
#endif
		}
	}

	return ret;
}

Example #6

File: dma-default.c Project: BoostFlash/hero2lteaelohapbackup

static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
	dma_addr_t * dma_handle, gfp_t gfp, struct dma_attrs *attrs)
{
	void *ret;
	struct page *page = NULL;
	unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;

	if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
		return ret;

	gfp = massage_gfp_flags(dev, gfp);

	if (IS_ENABLED(CONFIG_DMA_CMA) && !(gfp & GFP_ATOMIC))
		page = dma_alloc_from_contiguous(dev,
					count, get_order(size));
	if (!page)
		page = alloc_pages(gfp, get_order(size));

	if (!page)
		return NULL;

	ret = page_address(page);
	memset(ret, 0, size);
	*dma_handle = plat_map_dma_mem(dev, ret, size);
	if (!plat_device_is_coherent(dev)) {
		dma_cache_wback_inv((unsigned long) ret, size);
		if (!hw_coherentio)
			ret = UNCAC_ADDR(ret);
	}

	return ret;
}

Example #7

File: dma-mapping.c Project: WayWingsDev/gopro-linux

/*
 * Allocate DMA-coherent memory space and return both the kernel remapped
 * virtual and bus address for that space.
 */
void *
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
{
    void *memory;

    if (dma_alloc_from_coherent(dev, size, handle, &memory))
        return memory;

    return __dma_alloc(dev, size, handle, gfp,
                       pgprot_dmacoherent(pgprot_kernel));
}

Example #8

File: dma-swiotlb.c Project: laitianli/loongson-linux-2.6.36-3_mips

static void *loongson_dma_alloc_coherent(struct device *dev, size_t size,
	dma_addr_t *dma_handle, gfp_t gfp)
{
	void *ret;

	if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
		return ret;

	/* ignore region specifiers */
	gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM);

#ifdef CONFIG_ZONE_DMA
	if (dev == NULL)
		gfp |= __GFP_DMA;
	else if (dev->coherent_dma_mask <= DMA_BIT_MASK(24))
		gfp |= __GFP_DMA;
	else
#endif
#ifdef CONFIG_ZONE_DMA32
	if (dev == NULL)
		gfp |= __GFP_DMA32;
	else if (dev->coherent_dma_mask <= DMA_BIT_MASK(32))
		gfp |= __GFP_DMA32;
	else
#endif
		;

	/* Don't invoke OOM killer */
	gfp |= __GFP_NORETRY;

	ret = swiotlb_alloc_coherent(dev, size, dma_handle, gfp);

#ifdef LOONGSON_BIGMEM_DEBUG
	if((*dma_handle >= 0x90000000) || (*dma_handle < 0x80000000)){
		printk("+++%s %s: *dma_handle(0x%lx)\n", __FILE__, __func__, *dma_handle);
		dump_stack();
	}
#endif

	mb();

	return ret;
}

Example #9

File: dma.c Project: Blackburn29/PsycoKernel

void *dma_alloc_coherent(struct device *dev, size_t size,
			   dma_addr_t *dma_handle, gfp_t gfp)
{
	void *ret;
	int order = get_order(size);
	
	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);

	if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
		return ret;

	if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
		gfp |= GFP_DMA;

	ret = (void *)__get_free_pages(gfp, order);

	if (ret != NULL) {
		memset(ret, 0, size);
		*dma_handle = virt_to_phys(ret);
	}
	return ret;
}