diff options
Diffstat (limited to 'drivers/acpi/pci_bind.c')
| -rw-r--r-- | drivers/acpi/pci_bind.c | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c new file mode 100644 index 000000000000..5d19b39e9e2b --- /dev/null +++ b/drivers/acpi/pci_bind.c @@ -0,0 +1,384 @@ +/* + * 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; +}; + + +void +acpi_pci_data_handler ( + acpi_handle handle, + u32 function, + void *context) +{ + ACPI_FUNCTION_TRACE("acpi_pci_data_handler"); + + /* TBD: Anything we need to do here? */ + + return_VOID; +} + + +/** + * acpi_os_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. + */ +#ifdef ACPI_FUTURE_USAGE +acpi_status +acpi_os_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; + + ACPI_FUNCTION_TRACE("acpi_os_get_pci_id"); + + if (!id) + return_ACPI_STATUS(AE_BAD_PARAMETER); + + result = acpi_bus_get_device(handle, &device); + if (result) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Invalid ACPI Bus context for device %s\n", + acpi_device_bid(device))); + return_ACPI_STATUS(AE_NOT_EXIST); + } + + status = acpi_get_data(handle, acpi_pci_data_handler, (void**) &data); + if (ACPI_FAILURE(status) || !data || !data->dev) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Invalid ACPI-PCI context for device %s\n", + acpi_device_bid(device))); + return_ACPI_STATUS(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 %02x:%02x:%02x.%02x\n", + acpi_device_bid(device), id->segment, id->bus, + id->device, id->function)); + + return_ACPI_STATUS(AE_OK); +} +#endif /* ACPI_FUTURE_USAGE */ + + +int +acpi_pci_bind ( + struct acpi_device *device) +{ + int result = 0; + acpi_status status = AE_OK; + struct acpi_pci_data *data = NULL; + struct acpi_pci_data *pdata = NULL; + char *pathname = NULL; + struct acpi_buffer buffer = {0, NULL}; + acpi_handle handle = NULL; + + ACPI_FUNCTION_TRACE("acpi_pci_bind"); + + if (!device || !device->parent) + return_VALUE(-EINVAL); + + pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); + if(!pathname) + return_VALUE(-ENOMEM); + memset(pathname, 0, ACPI_PATHNAME_MAX); + buffer.length = ACPI_PATHNAME_MAX; + buffer.pointer = pathname; + + data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); + if (!data){ + kfree (pathname); + return_VALUE(-ENOMEM); + } + memset(data, 0, sizeof(struct acpi_pci_data)); + + acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n", + pathname)); + + /* + * 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_DEBUG_PRINT((ACPI_DB_ERROR, + "Invalid ACPI-PCI context for parent device %s\n", + 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 %02x:%02x:%02x.%02x\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_find_slot(data->id.bus, PCI_DEVFN(data->id.device, data->id.function)); + if (!data->dev) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Device %02x:%02x:%02x.%02x 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) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Device %02x:%02x:%02x.%02x 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 %02x:%02x:%02x.%02x 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_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to attach ACPI-PCI context to device %s\n", + 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(pathname); + if (result) + kfree(data); + + return_VALUE(result); +} + +int acpi_pci_unbind( + struct acpi_device *device) +{ + int result = 0; + acpi_status status = AE_OK; + struct acpi_pci_data *data = NULL; + char *pathname = NULL; + struct acpi_buffer buffer = {0, NULL}; + + ACPI_FUNCTION_TRACE("acpi_pci_unbind"); + + if (!device || !device->parent) + return_VALUE(-EINVAL); + + pathname = (char *) kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); + if(!pathname) + return_VALUE(-ENOMEM); + memset(pathname, 0, ACPI_PATHNAME_MAX); + + buffer.length = ACPI_PATHNAME_MAX; + buffer.pointer = pathname; + acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n", + pathname)); + kfree(pathname); + + status = acpi_get_data(device->handle, acpi_pci_data_handler, (void**)&data); + if (ACPI_FAILURE(status)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to get data from device %s\n", + acpi_device_bid(device))); + result = -ENODEV; + goto end; + } + + status = acpi_detach_data(device->handle, acpi_pci_data_handler); + if (ACPI_FAILURE(status)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to detach data from device %s\n", + acpi_device_bid(device))); + result = -ENODEV; + goto end; + } + if (data->dev->subordinate) { + acpi_pci_irq_del_prt(data->id.segment, data->bus->number); + } + kfree(data); + +end: + return_VALUE(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 = AE_OK; + struct acpi_pci_data *data = NULL; + char *pathname = NULL; + struct acpi_buffer buffer = {0, NULL}; + + ACPI_FUNCTION_TRACE("acpi_pci_bind_root"); + + pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); + if(!pathname) + return_VALUE(-ENOMEM); + memset(pathname, 0, ACPI_PATHNAME_MAX); + + buffer.length = ACPI_PATHNAME_MAX; + buffer.pointer = pathname; + + if (!device || !id || !bus){ + kfree(pathname); + return_VALUE(-EINVAL); + } + + data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); + if (!data){ + kfree(pathname); + return_VALUE(-ENOMEM); + } + memset(data, 0, sizeof(struct acpi_pci_data)); + + data->id = *id; + data->bus = bus; + device->ops.bind = acpi_pci_bind; + device->ops.unbind = acpi_pci_unbind; + + acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to " + "%02x:%02x\n", pathname, id->segment, id->bus)); + + status = acpi_attach_data(device->handle, acpi_pci_data_handler, data); + if (ACPI_FAILURE(status)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unable to attach ACPI-PCI context to device %s\n", + pathname)); + result = -ENODEV; + goto end; + } + +end: + kfree(pathname); + if (result != 0) + kfree(data); + + return_VALUE(result); +} |