patch-2.4.22 linux-2.4.22/drivers/acpi/pci_bind.c

• Lines: 310
• Date: 2003-08-25 04:44:41.000000000 -0700
• Orig file: linux-2.4.21/drivers/acpi/pci_bind.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/drivers/acpi/pci_bind.c linux-2.4.22/drivers/acpi/pci_bind.c
@@ -0,0 +1,309 @@
+/*
+ *  pci_bind.c - ACPI PCI Device Binding ($Revision: 3 $)
+ *
+ *  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")
+
+#define PREFIX			"ACPI: "
+
+
+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.
+ */
+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);
+}
+
+	
+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[ACPI_PATHNAME_MAX] = {0};
+	struct acpi_buffer	buffer = {ACPI_PATHNAME_MAX, pathname};
+	acpi_handle		handle = NULL;
+
+	ACPI_FUNCTION_TRACE("acpi_pci_bind");
+
+	if (!device || !device->parent)
+		return_VALUE(-EINVAL);
+
+	data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
+	if (!data)
+		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;
+	}
+
+	/*
+	 * 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:
+	if (result)
+		kfree(data);
+
+	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[ACPI_PATHNAME_MAX] = {0};
+	struct acpi_buffer	buffer = {ACPI_PATHNAME_MAX, pathname};
+
+	ACPI_FUNCTION_TRACE("acpi_pci_bind_root");
+
+	if (!device || !id || !bus)
+		return_VALUE(-EINVAL);
+
+	data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
+	if (!data)
+		return_VALUE(-ENOMEM);
+	memset(data, 0, sizeof(struct acpi_pci_data));
+
+	data->id = *id;
+	data->bus = bus;
+	device->ops.bind = acpi_pci_bind;
+
+	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:
+	if (result != 0)
+		kfree(data);
+
+	return_VALUE(result);
+}