Пример #1
0
dma_addr_t
pcibr_dma_map(struct pci_dev * hwdev, unsigned long phys_addr, size_t size, int dma_flags)
{
	dma_addr_t dma_handle;
	struct pcidev_info *pcidev_info = SN_PCIDEV_INFO(hwdev);

	
	if (hwdev->dma_mask < 0x7fffffff) {
		return 0;
	}

	if (hwdev->dma_mask == ~0UL) {

		dma_handle = pcibr_dmatrans_direct64(pcidev_info, phys_addr,
						     PCI64_ATTR_PREF, dma_flags);
	} else {
		
		dma_handle = pcibr_dmatrans_direct32(pcidev_info, phys_addr,
						     size, 0, dma_flags);
		if (!dma_handle) {

			dma_handle = pcibr_dmamap_ate32(pcidev_info, phys_addr,
							size, PCI32_ATE_PREF,
							dma_flags);
		}
	}

	return dma_handle;
}
Пример #2
0
dma_addr_t
pcibr_dma_map_consistent(struct pci_dev * hwdev, unsigned long phys_addr,
			 size_t size)
{
	dma_addr_t dma_handle;
	struct pcidev_info *pcidev_info = SN_PCIDEV_INFO(hwdev);

	if (hwdev->dev.coherent_dma_mask == ~0UL) {
		dma_handle = pcibr_dmatrans_direct64(pcidev_info, phys_addr,
					    PCI64_ATTR_BAR);
	} else {
		dma_handle = (dma_addr_t) pcibr_dmamap_ate32(pcidev_info,
						    phys_addr, size,
						    PCI32_ATE_BAR);
	}

	return dma_handle;
}
dma_addr_t
pcibr_dma_map(struct pci_dev * hwdev, unsigned long phys_addr, size_t size, int dma_flags)
{
	dma_addr_t dma_handle;
	struct pcidev_info *pcidev_info = SN_PCIDEV_INFO(hwdev);

	/* SN cannot support DMA addresses smaller than 32 bits. */
	if (hwdev->dma_mask < 0x7fffffff) {
		return 0;
	}

	if (hwdev->dma_mask == ~0UL) {
		/*
		 * Handle the most common case: 64 bit cards.  This
		 * call should always succeed.
		 */

		dma_handle = pcibr_dmatrans_direct64(pcidev_info, phys_addr,
						     PCI64_ATTR_PREF, dma_flags);
	} else {
		/* Handle 32-63 bit cards via direct mapping */
		dma_handle = pcibr_dmatrans_direct32(pcidev_info, phys_addr,
						     size, 0, dma_flags);
		if (!dma_handle) {
			/*
			 * It is a 32 bit card and we cannot do direct mapping,
			 * so we use an ATE.
			 */

			dma_handle = pcibr_dmamap_ate32(pcidev_info, phys_addr,
							size, PCI32_ATE_PREF,
							dma_flags);
		}
	}

	return dma_handle;
}