/*
* 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);
}
}
static dma_addr_t
pcibr_dmamap_ate32(struct pcidev_info *info,
uint64_t paddr, size_t req_size, uint64_t flags)
{
struct pcidev_info *pcidev_info = info->pdi_host_pcidev_info;
struct pcibus_info *pcibus_info = (struct pcibus_info *)pcidev_info->
pdi_pcibus_info;
uint8_t internal_device = (PCI_SLOT(pcidev_info->pdi_host_pcidev_info->
pdi_linux_pcidev->devfn)) - 1;
int ate_count;
int ate_index;
uint64_t ate_flags = flags | PCI32_ATE_V;
uint64_t ate;
uint64_t pci_addr;
uint64_t xio_addr;
uint64_t offset;
/* PIC in PCI-X mode does not supports 32bit PageMap mode */
if (IS_PIC_SOFT(pcibus_info) && IS_PCIX(pcibus_info)) {
return 0;
}
/* Calculate the number of ATEs needed. */
if (!(MINIMAL_ATE_FLAG(paddr, req_size))) {
ate_count = IOPG((IOPGSIZE - 1) /* worst case start offset */
+req_size /* max mapping bytes */
- 1) + 1; /* round UP */
} else { /* assume requested target is page aligned */
ate_count = IOPG(req_size /* max mapping bytes */
- 1) + 1; /* round UP */
}
/* Get the number of ATEs required. */
ate_index = pcibr_ate_alloc(pcibus_info, ate_count);
if (ate_index < 0)
return 0;
/* In PCI-X mode, Prefetch not supported */
if (IS_PCIX(pcibus_info))
ate_flags &= ~(PCI32_ATE_PREF);
xio_addr =
IS_PIC_SOFT(pcibus_info) ? PHYS_TO_DMA(paddr) :
PHYS_TO_TIODMA(paddr);
offset = IOPGOFF(xio_addr);
ate = ate_flags | (xio_addr - offset);
/* If PIC, put the targetid in the ATE */
if (IS_PIC_SOFT(pcibus_info)) {
ate |= (pcibus_info->pbi_hub_xid << PIC_ATE_TARGETID_SHFT);
}
ate_write(pcibus_info, ate_index, ate_count, ate);
/*
* Set up the DMA mapped Address.
*/
pci_addr = PCI32_MAPPED_BASE + offset + IOPGSIZE * ate_index;
/*
* If swap was set in device in pcibr_endian_set()
* we need to turn swapping on.
*/
if (pcibus_info->pbi_devreg[internal_device] & PCIBR_DEV_SWAP_DIR)
ATE_SWAP_ON(pci_addr);
return pci_addr;
}
static dma_addr_t
pcibr_dmamap_ate32(struct pcidev_info *info,
u64 paddr, size_t req_size, u64 flags, int dma_flags)
{
struct pcidev_info *pcidev_info = info->pdi_host_pcidev_info;
struct pcibus_info *pcibus_info = (struct pcibus_info *)pcidev_info->
pdi_pcibus_info;
u8 internal_device = (PCI_SLOT(pcidev_info->pdi_host_pcidev_info->
pdi_linux_pcidev->devfn)) - 1;
int ate_count;
int ate_index;
u64 ate_flags = flags | PCI32_ATE_V;
u64 ate;
u64 pci_addr;
u64 xio_addr;
u64 offset;
if (IS_PIC_SOFT(pcibus_info) && IS_PCIX(pcibus_info)) {
return 0;
}
if (!(MINIMAL_ATE_FLAG(paddr, req_size))) {
ate_count = IOPG((IOPGSIZE - 1)
+req_size
- 1) + 1;
} else {
ate_count = IOPG(req_size
- 1) + 1;
}
ate_index = pcibr_ate_alloc(pcibus_info, ate_count);
if (ate_index < 0)
return 0;
if (IS_PCIX(pcibus_info))
ate_flags &= ~(PCI32_ATE_PREF);
if (SN_DMA_ADDRTYPE(dma_flags == SN_DMA_ADDR_PHYS))
xio_addr = IS_PIC_SOFT(pcibus_info) ? PHYS_TO_DMA(paddr) :
PHYS_TO_TIODMA(paddr);
else
xio_addr = paddr;
offset = IOPGOFF(xio_addr);
ate = ate_flags | (xio_addr - offset);
if (IS_PIC_SOFT(pcibus_info)) {
ate |= (pcibus_info->pbi_hub_xid << PIC_ATE_TARGETID_SHFT);
}
if (dma_flags & SN_DMA_MSI) {
ate |= PCI32_ATE_MSI;
if (IS_TIOCP_SOFT(pcibus_info))
ate |= PCI32_ATE_PIO;
}
ate_write(pcibus_info, ate_index, ate_count, ate);
pci_addr = PCI32_MAPPED_BASE + offset + IOPGSIZE * ate_index;
if (pcibus_info->pbi_devreg[internal_device] & PCIBR_DEV_SWAP_DIR)
ATE_SWAP_ON(pci_addr);
return pci_addr;
}