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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
*/
#include <asm/sn/types.h>
#include <asm/sn/addrs.h>
#include <asm/sn/pcidev.h>
#include <asm/sn/pcibus_provider_defs.h>
#include <asm/sn/sn_sal.h>
#include "xtalk/hubdev.h"
#include <linux/acpi.h>
/*
* The code in this file will only be executed when running with
* a PROM that has ACPI IO support. (i.e., SN_ACPI_BASE_SUPPORT() == 1)
*/
/*
* This value must match the UUID the PROM uses
* (io/acpi/defblk.c) when building a vendor descriptor.
*/
struct acpi_vendor_uuid sn_uuid = {
.subtype = 0,
.data = { 0x2c, 0xc6, 0xa6, 0xfe, 0x9c, 0x44, 0xda, 0x11,
0xa2, 0x7c, 0x08, 0x00, 0x69, 0x13, 0xea, 0x51 },
};
/*
* Perform the early IO init in PROM.
*/
static s64
sal_ioif_init(u64 *result)
{
struct ia64_sal_retval isrv = {0,0,0,0};
SAL_CALL_NOLOCK(isrv,
SN_SAL_IOIF_INIT, 0, 0, 0, 0, 0, 0, 0);
*result = isrv.v0;
return isrv.status;
}
/*
* sn_hubdev_add - The 'add' function of the acpi_sn_hubdev_driver.
* Called for every "SGIHUB" or "SGITIO" device defined
* in the ACPI namespace.
*/
static int __init
sn_hubdev_add(struct acpi_device *device)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
u64 addr;
struct hubdev_info *hubdev;
struct hubdev_info *hubdev_ptr;
int i;
u64 nasid;
struct acpi_resource *resource;
int ret = 0;
acpi_status status;
struct acpi_resource_vendor_typed *vendor;
extern void sn_common_hubdev_init(struct hubdev_info *);
status = acpi_get_vendor_resource(device->handle, METHOD_NAME__CRS,
&sn_uuid, &buffer);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR
"sn_hubdev_add: acpi_get_vendor_resource() failed: %d\n",
status);
return 1;
}
resource = buffer.pointer;
vendor = &resource->data.vendor_typed;
if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
sizeof(struct hubdev_info *)) {
printk(KERN_ERR
"sn_hubdev_add: Invalid vendor data length: %d\n",
vendor->byte_length);
ret = 1;
goto exit;
}
memcpy(&addr, vendor->byte_data, sizeof(struct hubdev_info *));
hubdev_ptr = __va((struct hubdev_info *) addr);
nasid = hubdev_ptr->hdi_nasid;
i = nasid_to_cnodeid(nasid);
hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
*hubdev = *hubdev_ptr;
sn_common_hubdev_init(hubdev);
exit:
kfree(buffer.pointer);
return ret;
}
/*
* sn_get_bussoft_ptr() - The pcibus_bussoft pointer is found in
* the ACPI Vendor resource for this bus.
*/
static struct pcibus_bussoft *
sn_get_bussoft_ptr(struct pci_bus *bus)
{
u64 addr;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_handle handle;
struct pcibus_bussoft *prom_bussoft_ptr;
struct acpi_resource *resource;
acpi_status status;
struct acpi_resource_vendor_typed *vendor;
handle = PCI_CONTROLLER(bus)->acpi_handle;
status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
&sn_uuid, &buffer);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR "get_acpi_pcibus_ptr: "
"get_acpi_bussoft_info() failed: %d\n",
status);
return NULL;
}
resource = buffer.pointer;
vendor = &resource->data.vendor_typed;
if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
sizeof(struct pcibus_bussoft *)) {
printk(KERN_ERR
"get_acpi_bussoft_ptr: Invalid vendor data "
"length %d\n", vendor->byte_length);
kfree(buffer.pointer);
return NULL;
}
memcpy(&addr, vendor->byte_data, sizeof(struct pcibus_bussoft *));
prom_bussoft_ptr = __va((struct pcibus_bussoft *) addr);
kfree(buffer.pointer);
return prom_bussoft_ptr;
}
/*
* sn_acpi_bus_fixup
*/
void
sn_acpi_bus_fixup(struct pci_bus *bus)
{
struct pci_dev *pci_dev = NULL;
struct pcibus_bussoft *prom_bussoft_ptr;
extern void sn_common_bus_fixup(struct pci_bus *,
struct pcibus_bussoft *);
if (!bus->parent) { /* If root bus */
prom_bussoft_ptr = sn_get_bussoft_ptr(bus);
if (prom_bussoft_ptr == NULL) {
printk(KERN_ERR
"sn_pci_fixup_bus: 0x%04x:0x%02x Unable to "
"obtain prom_bussoft_ptr\n",
pci_domain_nr(bus), bus->number);
return;
}
sn_common_bus_fixup(bus, prom_bussoft_ptr);
}
list_for_each_entry(pci_dev, &bus->devices, bus_list) {
sn_pci_fixup_slot(pci_dev);
}
}
static struct acpi_driver acpi_sn_hubdev_driver = {
.name = "SGI HUBDEV Driver",
.ids = "SGIHUB,SGITIO",
.ops = {
.add = sn_hubdev_add,
},
};
/*
* sn_io_acpi_init - PROM has ACPI support for IO, defining at a minimum the
* nodes and root buses in the DSDT. As a result, bus scanning
* will be initiated by the Linux ACPI code.
*/
void __init
sn_io_acpi_init(void)
{
u64 result;
s64 status;
acpi_bus_register_driver(&acpi_sn_hubdev_driver);
status = sal_ioif_init(&result);
if (status || result)
panic("sal_ioif_init failed: [%lx] %s\n",
status, ia64_sal_strerror(status));
}
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