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;
}
/*
* Wrapper routine for free'ing DMA maps
* DMA mappings for Direct 64 and 32 do not have any DMA maps.
*/
void
pcibr_dma_unmap(struct pci_dev *hwdev, dma_addr_t dma_handle, int direction)
{
struct pcidev_info *pcidev_info = SN_PCIDEV_INFO(hwdev);
struct pcibus_info *pcibus_info =
(struct pcibus_info *)pcidev_info->pdi_pcibus_info;
if (IS_PCI32_MAPPED(dma_handle)) {
int ate_index;
ate_index =
IOPG((ATE_SWAP_OFF(dma_handle) - PCI32_MAPPED_BASE));
pcibr_ate_free(pcibus_info, ate_index);
}
}
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;
}
