diff options
Diffstat (limited to 'arch/ia64/sn/kernel/io_acpi_init.c')
| -rw-r--r-- | arch/ia64/sn/kernel/io_acpi_init.c | 513 |
1 files changed, 0 insertions, 513 deletions
diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c deleted file mode 100644 index c31fe637b0b4..000000000000 --- a/arch/ia64/sn/kernel/io_acpi_init.c +++ /dev/null @@ -1,513 +0,0 @@ -/* - * 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> -#include <linux/slab.h> -#include <linux/export.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 }, -}; - -struct sn_pcidev_match { - u8 bus; - unsigned int devfn; - acpi_handle handle; -}; - -/* - * Perform the early IO init in PROM. - */ -static long -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_acpi_hubdev_init() - This function is called by acpi_ns_get_device_callback() - * for all SGIHUB and SGITIO acpi devices defined in the - * DSDT. It obtains the hubdev_info pointer from the - * ACPI vendor resource, which the PROM setup, and sets up the - * hubdev_info in the pda. - */ - -static acpi_status __init -sn_acpi_hubdev_init(acpi_handle handle, u32 depth, void *context, void **ret) -{ - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - u64 addr; - struct hubdev_info *hubdev; - struct hubdev_info *hubdev_ptr; - int i; - u64 nasid; - struct acpi_resource *resource; - acpi_status status; - struct acpi_resource_vendor_typed *vendor; - extern void sn_common_hubdev_init(struct hubdev_info *); - - status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS, - &sn_uuid, &buffer); - if (ACPI_FAILURE(status)) { - acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer); - printk(KERN_ERR - "sn_acpi_hubdev_init: acpi_get_vendor_resource() " - "(0x%x) failed for: %s\n", status, - (char *)name_buffer.pointer); - kfree(name_buffer.pointer); - return AE_OK; /* Continue walking namespace */ - } - - resource = buffer.pointer; - vendor = &resource->data.vendor_typed; - if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) != - sizeof(struct hubdev_info *)) { - acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer); - printk(KERN_ERR - "sn_acpi_hubdev_init: Invalid vendor data length: " - "%d for: %s\n", - vendor->byte_length, (char *)name_buffer.pointer); - kfree(name_buffer.pointer); - 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 AE_OK; /* Continue walking namespace */ -} - -/* - * 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 }; - struct acpi_buffer name_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 = acpi_device_handle(PCI_CONTROLLER(bus)->companion); - status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS, - &sn_uuid, &buffer); - if (ACPI_FAILURE(status)) { - acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer); - printk(KERN_ERR "%s: " - "acpi_get_vendor_resource() failed (0x%x) for: %s\n", - __func__, status, (char *)name_buffer.pointer); - kfree(name_buffer.pointer); - 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 - "%s: Invalid vendor data length %d\n", - __func__, 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_extract_device_info - Extract the pcidev_info and the sn_irq_info - * pointers from the vendor resource using the - * provided acpi handle, and copy the structures - * into the argument buffers. - */ -static int -sn_extract_device_info(acpi_handle handle, struct pcidev_info **pcidev_info, - struct sn_irq_info **sn_irq_info) -{ - u64 addr; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - struct sn_irq_info *irq_info, *irq_info_prom; - struct pcidev_info *pcidev_ptr, *pcidev_prom_ptr; - struct acpi_resource *resource; - int ret = 0; - acpi_status status; - struct acpi_resource_vendor_typed *vendor; - - /* - * The pointer to this device's pcidev_info structure in - * the PROM, is in the vendor resource. - */ - status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS, - &sn_uuid, &buffer); - if (ACPI_FAILURE(status)) { - acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer); - printk(KERN_ERR - "%s: acpi_get_vendor_resource() failed (0x%x) for: %s\n", - __func__, status, (char *)name_buffer.pointer); - kfree(name_buffer.pointer); - return 1; - } - - resource = buffer.pointer; - vendor = &resource->data.vendor_typed; - if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) != - sizeof(struct pci_devdev_info *)) { - acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer); - printk(KERN_ERR - "%s: Invalid vendor data length: %d for: %s\n", - __func__, vendor->byte_length, - (char *)name_buffer.pointer); - kfree(name_buffer.pointer); - ret = 1; - goto exit; - } - - pcidev_ptr = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL); - if (!pcidev_ptr) - panic("%s: Unable to alloc memory for pcidev_info", __func__); - - memcpy(&addr, vendor->byte_data, sizeof(struct pcidev_info *)); - pcidev_prom_ptr = __va(addr); - memcpy(pcidev_ptr, pcidev_prom_ptr, sizeof(struct pcidev_info)); - - /* Get the IRQ info */ - irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL); - if (!irq_info) - panic("%s: Unable to alloc memory for sn_irq_info", __func__); - - if (pcidev_ptr->pdi_sn_irq_info) { - irq_info_prom = __va(pcidev_ptr->pdi_sn_irq_info); - memcpy(irq_info, irq_info_prom, sizeof(struct sn_irq_info)); - } - - *pcidev_info = pcidev_ptr; - *sn_irq_info = irq_info; - -exit: - kfree(buffer.pointer); - return ret; -} - -static unsigned int -get_host_devfn(acpi_handle device_handle, acpi_handle rootbus_handle) -{ - unsigned long long adr; - acpi_handle child; - unsigned int devfn; - int function; - acpi_handle parent; - int slot; - acpi_status status; - struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - - acpi_get_name(device_handle, ACPI_FULL_PATHNAME, &name_buffer); - - /* - * Do an upward search to find the root bus device, and - * obtain the host devfn from the previous child device. - */ - child = device_handle; - while (child) { - status = acpi_get_parent(child, &parent); - if (ACPI_FAILURE(status)) { - printk(KERN_ERR "%s: acpi_get_parent() failed " - "(0x%x) for: %s\n", __func__, status, - (char *)name_buffer.pointer); - panic("%s: Unable to find host devfn\n", __func__); - } - if (parent == rootbus_handle) - break; - child = parent; - } - if (!child) { - printk(KERN_ERR "%s: Unable to find root bus for: %s\n", - __func__, (char *)name_buffer.pointer); - BUG(); - } - - status = acpi_evaluate_integer(child, METHOD_NAME__ADR, NULL, &adr); - if (ACPI_FAILURE(status)) { - printk(KERN_ERR "%s: Unable to get _ADR (0x%x) for: %s\n", - __func__, status, (char *)name_buffer.pointer); - panic("%s: Unable to find host devfn\n", __func__); - } - - kfree(name_buffer.pointer); - - slot = (adr >> 16) & 0xffff; - function = adr & 0xffff; - devfn = PCI_DEVFN(slot, function); - return devfn; -} - -/* - * find_matching_device - Callback routine to find the ACPI device - * that matches up with our pci_dev device. - * Matching is done on bus number and devfn. - * To find the bus number for a particular - * ACPI device, we must look at the _BBN method - * of its parent. - */ -static acpi_status -find_matching_device(acpi_handle handle, u32 lvl, void *context, void **rv) -{ - unsigned long long bbn = -1; - unsigned long long adr; - acpi_handle parent = NULL; - acpi_status status; - unsigned int devfn; - int function; - int slot; - struct sn_pcidev_match *info = context; - struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - - status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, - &adr); - if (ACPI_SUCCESS(status)) { - status = acpi_get_parent(handle, &parent); - if (ACPI_FAILURE(status)) { - acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer); - printk(KERN_ERR - "%s: acpi_get_parent() failed (0x%x) for: %s\n", - __func__, status, (char *)name_buffer.pointer); - kfree(name_buffer.pointer); - return AE_OK; - } - status = acpi_evaluate_integer(parent, METHOD_NAME__BBN, - NULL, &bbn); - if (ACPI_FAILURE(status)) { - acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer); - printk(KERN_ERR - "%s: Failed to find _BBN in parent of: %s\n", - __func__, (char *)name_buffer.pointer); - kfree(name_buffer.pointer); - return AE_OK; - } - - slot = (adr >> 16) & 0xffff; - function = adr & 0xffff; - devfn = PCI_DEVFN(slot, function); - if ((info->devfn == devfn) && (info->bus == bbn)) { - /* We have a match! */ - info->handle = handle; - return 1; - } - } - return AE_OK; -} - -/* - * sn_acpi_get_pcidev_info - Search ACPI namespace for the acpi - * device matching the specified pci_dev, - * and return the pcidev info and irq info. - */ -int -sn_acpi_get_pcidev_info(struct pci_dev *dev, struct pcidev_info **pcidev_info, - struct sn_irq_info **sn_irq_info) -{ - unsigned int host_devfn; - struct sn_pcidev_match pcidev_match; - acpi_handle rootbus_handle; - unsigned long long segment; - acpi_status status; - struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - - rootbus_handle = acpi_device_handle(PCI_CONTROLLER(dev)->companion); - status = acpi_evaluate_integer(rootbus_handle, METHOD_NAME__SEG, NULL, - &segment); - if (ACPI_SUCCESS(status)) { - if (segment != pci_domain_nr(dev)) { - acpi_get_name(rootbus_handle, ACPI_FULL_PATHNAME, - &name_buffer); - printk(KERN_ERR - "%s: Segment number mismatch, 0x%llx vs 0x%x for: %s\n", - __func__, segment, pci_domain_nr(dev), - (char *)name_buffer.pointer); - kfree(name_buffer.pointer); - return 1; - } - } else { - acpi_get_name(rootbus_handle, ACPI_FULL_PATHNAME, &name_buffer); - printk(KERN_ERR "%s: Unable to get __SEG from: %s\n", - __func__, (char *)name_buffer.pointer); - kfree(name_buffer.pointer); - return 1; - } - - /* - * We want to search all devices in this segment/domain - * of the ACPI namespace for the matching ACPI device, - * which holds the pcidev_info pointer in its vendor resource. - */ - pcidev_match.bus = dev->bus->number; - pcidev_match.devfn = dev->devfn; - pcidev_match.handle = NULL; - - acpi_walk_namespace(ACPI_TYPE_DEVICE, rootbus_handle, ACPI_UINT32_MAX, - find_matching_device, NULL, &pcidev_match, NULL); - - if (!pcidev_match.handle) { - printk(KERN_ERR - "%s: Could not find matching ACPI device for %s.\n", - __func__, pci_name(dev)); - return 1; - } - - if (sn_extract_device_info(pcidev_match.handle, pcidev_info, sn_irq_info)) - return 1; - - /* Build up the pcidev_info.pdi_slot_host_handle */ - host_devfn = get_host_devfn(pcidev_match.handle, rootbus_handle); - (*pcidev_info)->pdi_slot_host_handle = - ((unsigned long) pci_domain_nr(dev) << 40) | - /* bus == 0 */ - host_devfn; - return 0; -} - -/* - * sn_acpi_slot_fixup - Obtain the pcidev_info and sn_irq_info. - * 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 = NULL; - struct sn_irq_info *sn_irq_info = NULL; - struct resource *res; - size_t size; - - if (sn_acpi_get_pcidev_info(dev, &pcidev_info, &sn_irq_info)) { - panic("%s: Failure obtaining pcidev_info for %s\n", - __func__, pci_name(dev)); - } - - 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 with the address - * of the shadowed copy, and the actual length of the ROM image. - */ - size = pci_resource_len(dev, PCI_ROM_RESOURCE); - - res = &dev->resource[PCI_ROM_RESOURCE]; - - pci_disable_rom(dev); - if (res->parent) - release_resource(res); - - res->start = pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]; - res->end = res->start + size - 1; - res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW | - IORESOURCE_PCI_FIXED; - } - sn_pci_fixup_slot(dev, pcidev_info, sn_irq_info); -} -EXPORT_SYMBOL(sn_acpi_slot_fixup); - - -/* - * sn_acpi_bus_fixup - Perform SN specific setup of software structs - * (pcibus_bussoft, pcidev_info) and hardware - * registers, for the specified bus and devices under it. - */ -void -sn_acpi_bus_fixup(struct pci_bus *bus) -{ - struct pci_dev *pci_dev = NULL; - struct pcibus_bussoft *prom_bussoft_ptr; - - if (!bus->parent) { /* If root bus */ - prom_bussoft_ptr = sn_get_bussoft_ptr(bus); - if (prom_bussoft_ptr == NULL) { - printk(KERN_ERR - "%s: 0x%04x:0x%02x Unable to " - "obtain prom_bussoft_ptr\n", - __func__, 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_acpi_slot_fixup(pci_dev); - } -} - -/* - * 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; - long status; - - /* SN Altix does not follow the IOSAPIC IRQ routing model */ - acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM; - - /* Setup hubdev_info for all SGIHUB/SGITIO devices */ - acpi_get_devices("SGIHUB", sn_acpi_hubdev_init, NULL, NULL); - acpi_get_devices("SGITIO", sn_acpi_hubdev_init, NULL, NULL); - - status = sal_ioif_init(&result); - if (status || result) - panic("sal_ioif_init failed: [%lx] %s\n", - status, ia64_sal_strerror(status)); -} |