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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);
- }
- }
- /*
- * sn_acpi_slot_fixup - Perform any SN specific slot fixup.
- * At present there does not appear to be
- * any generic way to handle a ROM image
- * that has been shadowed by the PROM, so
- * we pass a pointer to it within the
- * pcidev_info structure.
- */
- void
- sn_acpi_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info)
- {
- void __iomem *addr;
- size_t size;
- if (pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]) {
- /*
- * A valid ROM image exists and has been shadowed by the
- * PROM. Setup the pci_dev ROM resource to point to
- * the shadowed copy.
- */
- size = dev->resource[PCI_ROM_RESOURCE].end -
- dev->resource[PCI_ROM_RESOURCE].start;
- addr =
- ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
- size);
- dev->resource[PCI_ROM_RESOURCE].start = (unsigned long) addr;
- dev->resource[PCI_ROM_RESOURCE].end =
- (unsigned long) addr + size;
- dev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_BIOS_COPY;
- }
- }
- 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;
- /* SN Altix does not follow the IOSAPIC IRQ routing model */
- acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
- 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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