char *sn_pci_get_legacy_mem(struct pci_bus *bus)
{
if (!SN_PCIBUS_BUSSOFT(bus))
return ERR_PTR(-ENODEV);
return (char *)(SN_PCIBUS_BUSSOFT(bus)->bs_legacy_mem | __IA64_UNCACHED_OFFSET);
}
int sn_pci_legacy_write(struct pci_bus *bus, u16 port, u32 val, u8 size)
{
int ret = size;
unsigned long paddr;
unsigned long *addr;
struct ia64_sal_retval isrv;
/*
* First, try the SN_SAL_IOIF_PCI_SAFE SAL call which can work
* around hw issues at the pci bus level. SGI proms older than
* 4.10 don't implment this.
*/
SAL_CALL(isrv, SN_SAL_IOIF_PCI_SAFE,
pci_domain_nr(bus), bus->number,
0, /* io */
1, /* write */
port, size, __pa(&val));
if (isrv.status == 0)
return size;
/*
* If the above failed, retry using the SAL_PROBE call which should
* be present in all proms (but which cannot work round PCI chipset
* bugs). This code is retained for compatability with old
* pre-4.10 proms, and should be removed at some point in the future.
*/
if (!SN_PCIBUS_BUSSOFT(bus)) {
ret = -ENODEV;
goto out;
}
/* Put the phys addr in uncached space */
paddr = SN_PCIBUS_BUSSOFT(bus)->bs_legacy_io | __IA64_UNCACHED_OFFSET;
paddr += port;
addr = (unsigned long *)paddr;
switch (size) {
case 1:
*(volatile u8 *)(addr) = (u8)(val);
break;
case 2:
*(volatile u16 *)(addr) = (u16)(val);
break;
case 4:
*(volatile u32 *)(addr) = (u32)(val);
break;
default:
ret = -EINVAL;
break;
}
out:
return ret;
}
int sn_pci_legacy_read(struct pci_bus *bus, u16 port, u32 *val, u8 size)
{
unsigned long addr;
int ret;
struct ia64_sal_retval isrv;
/*
* First, try the SN_SAL_IOIF_PCI_SAFE SAL call which can work
* around hw issues at the pci bus level. SGI proms older than
* 4.10 don't implment this.
*/
SAL_CALL(isrv, SN_SAL_IOIF_PCI_SAFE,
pci_domain_nr(bus), bus->number,
0, /* io */
0, /* read */
port, size, __pa(val));
if (isrv.status == 0)
return size;
/*
* If the above failed, retry using the SAL_PROBE call which should
* be present in all proms (but which cannot work round PCI chipset
* bugs). This code is retained for compatability with old
* pre-4.10 proms, and should be removed at some point in the future.
*/
if (!SN_PCIBUS_BUSSOFT(bus))
return -ENODEV;
addr = SN_PCIBUS_BUSSOFT(bus)->bs_legacy_io | __IA64_UNCACHED_OFFSET;
addr += port;
ret = ia64_sn_probe_mem(addr, (long)size, (void *)val);
if (ret == 2)
return -EINVAL;
if (ret == 1)
*val = -1;
return size;
}
u16 sn_ioboard_to_pci_bus(struct pci_bus *pci_bus)
{
s64 rc;
u16 ioboard;
nasid_t nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard);
if (rc) {
printk(KERN_WARNING "ia64_sn_sysctl_ioboard_get failed: %ld\n",
rc);
return 0;
}
return ioboard;
}
u16 sn_ioboard_to_pci_bus(struct pci_bus *pci_bus)
{
long rc;
u16 uninitialized_var(ioboard); /* GCC be quiet */
nasid_t nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard);
if (rc) {
printk(KERN_WARNING "ia64_sn_sysctl_ioboard_get failed: %ld\n",
rc);
return 0;
}
return ioboard;
}