patch-2.4.22 linux-2.4.22/drivers/acpi/pci_root.c
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- Lines: 395
- Date:
2003-08-25 04:44:41.000000000 -0700
- Orig file:
linux-2.4.21/drivers/acpi/pci_root.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.21/drivers/acpi/pci_root.c linux-2.4.22/drivers/acpi/pci_root.c
@@ -0,0 +1,394 @@
+/*
+ * pci_root.c - ACPI PCI Root Bridge Driver ($Revision: 41 $)
+ *
+ * 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_root")
+
+extern struct pci_ops *pci_root_ops;
+
+#define PREFIX "ACPI: "
+
+static int acpi_pci_root_add (struct acpi_device *device);
+static int acpi_pci_root_remove (struct acpi_device *device, int type);
+
+static struct acpi_driver acpi_pci_root_driver = {
+ .name = ACPI_PCI_ROOT_DRIVER_NAME,
+ .class = ACPI_PCI_ROOT_CLASS,
+ .ids = ACPI_PCI_ROOT_HID,
+ .ops = {
+ .add = acpi_pci_root_add,
+ .remove = acpi_pci_root_remove,
+ },
+};
+
+struct acpi_pci_root {
+ struct list_head node;
+ acpi_handle handle;
+ struct acpi_pci_id id;
+ struct pci_bus *bus;
+ u64 mem_tra;
+ u64 io_tra;
+};
+
+struct list_head acpi_pci_roots;
+
+static struct acpi_pci_driver *sub_driver;
+
+int acpi_pci_register_driver(struct acpi_pci_driver *driver)
+{
+ int n = 0;
+ struct list_head *entry;
+
+ struct acpi_pci_driver **pptr = &sub_driver;
+ while (*pptr)
+ pptr = &(*pptr)->next;
+ *pptr = driver;
+
+ if (!driver->add)
+ return 0;
+
+ list_for_each(entry, &acpi_pci_roots) {
+ struct acpi_pci_root *root;
+ root = list_entry(entry, struct acpi_pci_root, node);
+ driver->add(root->handle);
+ n++;
+ }
+
+ return n;
+}
+
+void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
+{
+ struct list_head *entry;
+
+ struct acpi_pci_driver **pptr = &sub_driver;
+ while (*pptr) {
+ if (*pptr != driver)
+ continue;
+ *pptr = (*pptr)->next;
+ break;
+ }
+
+ if (!driver->remove)
+ return;
+
+ list_for_each(entry, &acpi_pci_roots) {
+ struct acpi_pci_root *root;
+ root = list_entry(entry, struct acpi_pci_root, node);
+ driver->remove(root->handle);
+ }
+}
+
+void
+acpi_pci_get_translations (
+ struct acpi_pci_id *id,
+ u64 *mem_tra,
+ u64 *io_tra)
+{
+ struct list_head *node = NULL;
+ struct acpi_pci_root *entry;
+
+ /* TBD: Locking */
+ list_for_each(node, &acpi_pci_roots) {
+ entry = list_entry(node, struct acpi_pci_root, node);
+ if ((id->segment == entry->id.segment)
+ && (id->bus == entry->id.bus)) {
+ *mem_tra = entry->mem_tra;
+ *io_tra = entry->io_tra;
+ return;
+ }
+ }
+
+ *mem_tra = 0;
+ *io_tra = 0;
+}
+
+
+static u64
+acpi_pci_root_bus_tra (
+ struct acpi_resource *resource,
+ int type)
+{
+ struct acpi_resource_address16 *address16;
+ struct acpi_resource_address32 *address32;
+ struct acpi_resource_address64 *address64;
+
+ while (1) {
+ switch (resource->id) {
+ case ACPI_RSTYPE_END_TAG:
+ return 0;
+
+ case ACPI_RSTYPE_ADDRESS16:
+ address16 = (struct acpi_resource_address16 *) &resource->data;
+ if (type == address16->resource_type) {
+ return address16->address_translation_offset;
+ }
+ break;
+
+ case ACPI_RSTYPE_ADDRESS32:
+ address32 = (struct acpi_resource_address32 *) &resource->data;
+ if (type == address32->resource_type) {
+ return address32->address_translation_offset;
+ }
+ break;
+
+ case ACPI_RSTYPE_ADDRESS64:
+ address64 = (struct acpi_resource_address64 *) &resource->data;
+ if (type == address64->resource_type) {
+ return address64->address_translation_offset;
+ }
+ break;
+ }
+ resource = ACPI_PTR_ADD (struct acpi_resource,
+ resource, resource->length);
+ }
+
+ return 0;
+}
+
+
+static int
+acpi_pci_evaluate_crs (
+ struct acpi_pci_root *root)
+{
+ acpi_status status;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+
+ ACPI_FUNCTION_TRACE("acpi_pci_evaluate_crs");
+
+ status = acpi_get_current_resources (root->handle, &buffer);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+
+ root->io_tra = acpi_pci_root_bus_tra ((struct acpi_resource *)
+ buffer.pointer, ACPI_IO_RANGE);
+ root->mem_tra = acpi_pci_root_bus_tra ((struct acpi_resource *)
+ buffer.pointer, ACPI_MEMORY_RANGE);
+
+ acpi_os_free(buffer.pointer);
+ return_VALUE(0);
+}
+
+
+static int
+acpi_pci_root_add (
+ struct acpi_device *device)
+{
+ int result = 0;
+ struct acpi_pci_root *root = NULL;
+ acpi_status status = AE_OK;
+ unsigned long value = 0;
+ acpi_handle handle = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_pci_root_add");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ root = kmalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
+ if (!root)
+ return_VALUE(-ENOMEM);
+ memset(root, 0, sizeof(struct acpi_pci_root));
+
+ root->handle = device->handle;
+ sprintf(acpi_device_name(device), "%s", ACPI_PCI_ROOT_DEVICE_NAME);
+ sprintf(acpi_device_class(device), "%s", ACPI_PCI_ROOT_CLASS);
+ acpi_driver_data(device) = root;
+
+ /*
+ * TBD: Doesn't the bus driver automatically set this?
+ */
+ device->ops.bind = acpi_pci_bind;
+
+ /*
+ * Segment
+ * -------
+ * Obtained via _SEG, if exists, otherwise assumed to be zero (0).
+ */
+ status = acpi_evaluate_integer(root->handle, METHOD_NAME__SEG, NULL,
+ &value);
+ switch (status) {
+ case AE_OK:
+ root->id.segment = (u16) value;
+ printk("_SEG exists! Unsupported. Abort.\n");
+ BUG();
+ break;
+ case AE_NOT_FOUND:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Assuming segment 0 (no _SEG)\n"));
+ root->id.segment = 0;
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _SEG\n"));
+ result = -ENODEV;
+ goto end;
+ }
+
+ /*
+ * Bus
+ * ---
+ * Obtained via _BBN, if exists, otherwise assumed to be zero (0).
+ */
+ status = acpi_evaluate_integer(root->handle, METHOD_NAME__BBN, NULL,
+ &value);
+ switch (status) {
+ case AE_OK:
+ root->id.bus = (u16) value;
+ break;
+ case AE_NOT_FOUND:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Assuming bus 0 (no _BBN)\n"));
+ root->id.bus = 0;
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _BBN\n"));
+ result = -ENODEV;
+ goto end;
+ }
+
+ /*
+ * Device & Function
+ * -----------------
+ * Obtained from _ADR (which has already been evaluated for us).
+ */
+ root->id.device = device->pnp.bus_address >> 16;
+ root->id.function = device->pnp.bus_address & 0xFFFF;
+
+ /*
+ * Evaluate _CRS to get root bridge resources
+ * TBD: Need PCI interface for enumeration/configuration of roots.
+ */
+ acpi_pci_evaluate_crs(root);
+
+ /* TBD: Locking */
+ list_add_tail(&root->node, &acpi_pci_roots);
+
+ printk(KERN_INFO PREFIX "%s [%s] (%02x:%02x)\n",
+ acpi_device_name(device), acpi_device_bid(device),
+ root->id.segment, root->id.bus);
+
+ /*
+ * Scan the Root Bridge
+ * --------------------
+ * Must do this prior to any attempt to bind the root device, as the
+ * PCI namespace does not get created until this call is made (and
+ * thus the root bridge's pci_dev does not exist).
+ */
+ root->bus = pcibios_scan_root(root->id.bus);
+ if (!root->bus) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Bus %02x:%02x not present in PCI namespace\n",
+ root->id.segment, root->id.bus));
+ result = -ENODEV;
+ goto end;
+ }
+
+ /*
+ * Attach ACPI-PCI Context
+ * -----------------------
+ * Thus binding the ACPI and PCI devices.
+ */
+ result = acpi_pci_bind_root(device, &root->id, root->bus);
+ if (result)
+ goto end;
+
+ /*
+ * PCI Routing Table
+ * -----------------
+ * Evaluate and parse _PRT, if exists.
+ */
+ status = acpi_get_handle(root->handle, METHOD_NAME__PRT, &handle);
+ if (ACPI_SUCCESS(status))
+ result = acpi_pci_irq_add_prt(root->handle, root->id.segment,
+ root->id.bus);
+
+end:
+ if (result)
+ kfree(root);
+
+ return_VALUE(result);
+}
+
+
+static int
+acpi_pci_root_remove (
+ struct acpi_device *device,
+ int type)
+{
+ struct acpi_pci_root *root = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_pci_root_remove");
+
+ if (!device || !acpi_driver_data(device))
+ return_VALUE(-EINVAL);
+
+ root = (struct acpi_pci_root *) acpi_driver_data(device);
+
+ kfree(root);
+
+ return_VALUE(0);
+}
+
+
+int __init
+acpi_pci_root_init (void)
+{
+ ACPI_FUNCTION_TRACE("acpi_pci_root_init");
+
+ /* DEBUG:
+ acpi_dbg_layer = ACPI_PCI_COMPONENT;
+ acpi_dbg_level = 0xFFFFFFFF;
+ */
+
+ INIT_LIST_HEAD(&acpi_pci_roots);
+
+ if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0)
+ return_VALUE(-ENODEV);
+
+ return_VALUE(0);
+}
+
+
+void __exit
+acpi_pci_root_exit (void)
+{
+ ACPI_FUNCTION_TRACE("acpi_pci_root_exit");
+
+ acpi_bus_unregister_driver(&acpi_pci_root_driver);
+
+ return_VOID;
+}
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