| /* |
| * pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $) |
| * |
| * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or (at |
| * your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/proc_fs.h> |
| #include <linux/spinlock.h> |
| #include <linux/pm.h> |
| #include <linux/pci.h> |
| #include <linux/acpi.h> |
| #include <acpi/acpi_bus.h> |
| #include <acpi/acpi_drivers.h> |
| |
| #define _COMPONENT ACPI_PCI_COMPONENT |
| ACPI_MODULE_NAME("pci_bind"); |
| |
| struct acpi_pci_data { |
| struct acpi_pci_id id; |
| struct pci_bus *bus; |
| struct pci_dev *dev; |
| }; |
| |
| static int acpi_pci_bind(struct acpi_device *device); |
| static int acpi_pci_unbind(struct acpi_device *device); |
| |
| static void acpi_pci_data_handler(acpi_handle handle, u32 function, |
| void *context) |
| { |
| |
| /* TBD: Anything we need to do here? */ |
| |
| return; |
| } |
| |
| /** |
| * acpi_get_pci_id |
| * ------------------ |
| * This function is used by the ACPI Interpreter (a.k.a. Core Subsystem) |
| * to resolve PCI information for ACPI-PCI devices defined in the namespace. |
| * This typically occurs when resolving PCI operation region information. |
| */ |
| acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id) |
| { |
| int result = 0; |
| acpi_status status = AE_OK; |
| struct acpi_device *device = NULL; |
| struct acpi_pci_data *data = NULL; |
| |
| |
| if (!id) |
| return AE_BAD_PARAMETER; |
| |
| result = acpi_bus_get_device(handle, &device); |
| if (result) { |
| printk(KERN_ERR PREFIX |
| "Invalid ACPI Bus context for device %s\n", |
| acpi_device_bid(device)); |
| return AE_NOT_EXIST; |
| } |
| |
| status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data); |
| if (ACPI_FAILURE(status) || !data) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "Invalid ACPI-PCI context for device %s", |
| acpi_device_bid(device))); |
| return status; |
| } |
| |
| *id = data->id; |
| |
| /* |
| id->segment = data->id.segment; |
| id->bus = data->id.bus; |
| id->device = data->id.device; |
| id->function = data->id.function; |
| */ |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Device %s has PCI address %04x:%02x:%02x.%d\n", |
| acpi_device_bid(device), id->segment, id->bus, |
| id->device, id->function)); |
| |
| return AE_OK; |
| } |
| |
| EXPORT_SYMBOL(acpi_get_pci_id); |
| |
| static int acpi_pci_unbind(struct acpi_device *device) |
| { |
| int result = 0; |
| acpi_status status; |
| struct acpi_pci_data *data; |
| struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| |
| |
| if (!device || !device->parent) |
| return -EINVAL; |
| |
| status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); |
| if (ACPI_FAILURE(status)) |
| return -ENODEV; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n", |
| (char *) buffer.pointer)); |
| kfree(buffer.pointer); |
| |
| status = |
| acpi_get_data(device->handle, acpi_pci_data_handler, |
| (void **)&data); |
| if (ACPI_FAILURE(status)) { |
| result = -ENODEV; |
| goto end; |
| } |
| |
| status = acpi_detach_data(device->handle, acpi_pci_data_handler); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "Unable to detach data from device %s", |
| acpi_device_bid(device))); |
| result = -ENODEV; |
| goto end; |
| } |
| if (data->dev->subordinate) { |
| acpi_pci_irq_del_prt(data->id.segment, data->bus->number); |
| } |
| pci_dev_put(data->dev); |
| kfree(data); |
| |
| end: |
| return result; |
| } |
| |
| static int acpi_pci_bind(struct acpi_device *device) |
| { |
| int result = 0; |
| acpi_status status; |
| struct acpi_pci_data *data; |
| struct acpi_pci_data *pdata; |
| struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| acpi_handle handle; |
| |
| if (!device || !device->parent) |
| return -EINVAL; |
| |
| data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); |
| if (ACPI_FAILURE(status)) { |
| kfree(data); |
| return -ENODEV; |
| } |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n", |
| (char *)buffer.pointer)); |
| |
| /* |
| * Segment & Bus |
| * ------------- |
| * These are obtained via the parent device's ACPI-PCI context. |
| */ |
| status = acpi_get_data(device->parent->handle, acpi_pci_data_handler, |
| (void **)&pdata); |
| if (ACPI_FAILURE(status) || !pdata || !pdata->bus) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "Invalid ACPI-PCI context for parent device %s", |
| acpi_device_bid(device->parent))); |
| result = -ENODEV; |
| goto end; |
| } |
| data->id.segment = pdata->id.segment; |
| data->id.bus = pdata->bus->number; |
| |
| /* |
| * Device & Function |
| * ----------------- |
| * These are simply obtained from the device's _ADR method. Note |
| * that a value of zero is valid. |
| */ |
| data->id.device = device->pnp.bus_address >> 16; |
| data->id.function = device->pnp.bus_address & 0xFFFF; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %04x:%02x:%02x.%d\n", |
| data->id.segment, data->id.bus, data->id.device, |
| data->id.function)); |
| |
| /* |
| * TBD: Support slot devices (e.g. function=0xFFFF). |
| */ |
| |
| /* |
| * Locate PCI Device |
| * ----------------- |
| * Locate matching device in PCI namespace. If it doesn't exist |
| * this typically means that the device isn't currently inserted |
| * (e.g. docking station, port replicator, etc.). |
| */ |
| data->dev = pci_get_slot(pdata->bus, |
| PCI_DEVFN(data->id.device, data->id.function)); |
| if (!data->dev) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Device %04x:%02x:%02x.%d not present in PCI namespace\n", |
| data->id.segment, data->id.bus, |
| data->id.device, data->id.function)); |
| result = -ENODEV; |
| goto end; |
| } |
| if (!data->dev->bus) { |
| printk(KERN_ERR PREFIX |
| "Device %04x:%02x:%02x.%d has invalid 'bus' field\n", |
| data->id.segment, data->id.bus, |
| data->id.device, data->id.function); |
| result = -ENODEV; |
| goto end; |
| } |
| |
| /* |
| * PCI Bridge? |
| * ----------- |
| * If so, set the 'bus' field and install the 'bind' function to |
| * facilitate callbacks for all of its children. |
| */ |
| if (data->dev->subordinate) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Device %04x:%02x:%02x.%d is a PCI bridge\n", |
| data->id.segment, data->id.bus, |
| data->id.device, data->id.function)); |
| data->bus = data->dev->subordinate; |
| device->ops.bind = acpi_pci_bind; |
| device->ops.unbind = acpi_pci_unbind; |
| } |
| |
| /* |
| * Attach ACPI-PCI Context |
| * ----------------------- |
| * Thus binding the ACPI and PCI devices. |
| */ |
| status = acpi_attach_data(device->handle, acpi_pci_data_handler, data); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "Unable to attach ACPI-PCI context to device %s", |
| acpi_device_bid(device))); |
| result = -ENODEV; |
| goto end; |
| } |
| |
| /* |
| * PCI Routing Table |
| * ----------------- |
| * Evaluate and parse _PRT, if exists. This code is independent of |
| * PCI bridges (above) to allow parsing of _PRT objects within the |
| * scope of non-bridge devices. Note that _PRTs within the scope of |
| * a PCI bridge assume the bridge's subordinate bus number. |
| * |
| * TBD: Can _PRTs exist within the scope of non-bridge PCI devices? |
| */ |
| status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
| if (ACPI_SUCCESS(status)) { |
| if (data->bus) /* PCI-PCI bridge */ |
| acpi_pci_irq_add_prt(device->handle, data->id.segment, |
| data->bus->number); |
| else /* non-bridge PCI device */ |
| acpi_pci_irq_add_prt(device->handle, data->id.segment, |
| data->id.bus); |
| } |
| |
| end: |
| kfree(buffer.pointer); |
| if (result) { |
| pci_dev_put(data->dev); |
| kfree(data); |
| } |
| return result; |
| } |
| |
| int |
| acpi_pci_bind_root(struct acpi_device *device, |
| struct acpi_pci_id *id, struct pci_bus *bus) |
| { |
| int result = 0; |
| acpi_status status; |
| struct acpi_pci_data *data = NULL; |
| struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| |
| if (!device || !id || !bus) { |
| return -EINVAL; |
| } |
| |
| data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| data->id = *id; |
| data->bus = bus; |
| device->ops.bind = acpi_pci_bind; |
| device->ops.unbind = acpi_pci_unbind; |
| |
| status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); |
| if (ACPI_FAILURE(status)) { |
| kfree (data); |
| return -ENODEV; |
| } |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to " |
| "%04x:%02x\n", (char *)buffer.pointer, |
| id->segment, id->bus)); |
| |
| status = acpi_attach_data(device->handle, acpi_pci_data_handler, data); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "Unable to attach ACPI-PCI context to device %s", |
| (char *)buffer.pointer)); |
| result = -ENODEV; |
| goto end; |
| } |
| |
| end: |
| kfree(buffer.pointer); |
| if (result != 0) |
| kfree(data); |
| |
| return result; |
| } |