2005-04-17 06:20:36 +08:00
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/*
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* pci_root.c - ACPI PCI Root Bridge Driver ($Revision: 40 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/spinlock.h>
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#include <linux/pm.h>
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#include <linux/pci.h>
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#include <linux/acpi.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#define _COMPONENT ACPI_PCI_COMPONENT
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2005-08-05 12:44:28 +08:00
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ACPI_MODULE_NAME("pci_root")
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2005-04-17 06:20:36 +08:00
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#define ACPI_PCI_ROOT_CLASS "pci_bridge"
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#define ACPI_PCI_ROOT_HID "PNP0A03"
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#define ACPI_PCI_ROOT_DRIVER_NAME "ACPI PCI Root Bridge Driver"
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#define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge"
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2005-08-05 12:44:28 +08:00
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static int acpi_pci_root_add(struct acpi_device *device);
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static int acpi_pci_root_remove(struct acpi_device *device, int type);
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static int acpi_pci_root_start(struct acpi_device *device);
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2005-04-17 06:20:36 +08:00
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static struct acpi_driver acpi_pci_root_driver = {
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2005-08-05 12:44:28 +08:00
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.name = ACPI_PCI_ROOT_DRIVER_NAME,
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.class = ACPI_PCI_ROOT_CLASS,
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.ids = ACPI_PCI_ROOT_HID,
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.ops = {
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.add = acpi_pci_root_add,
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.remove = acpi_pci_root_remove,
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.start = acpi_pci_root_start,
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},
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2005-04-17 06:20:36 +08:00
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};
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struct acpi_pci_root {
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2005-08-05 12:44:28 +08:00
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struct list_head node;
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2006-05-20 04:54:39 +08:00
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struct acpi_device * device;
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2005-08-05 12:44:28 +08:00
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struct acpi_pci_id id;
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struct pci_bus *bus;
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2005-04-17 06:20:36 +08:00
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};
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static LIST_HEAD(acpi_pci_roots);
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static struct acpi_pci_driver *sub_driver;
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int acpi_pci_register_driver(struct acpi_pci_driver *driver)
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{
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int n = 0;
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struct list_head *entry;
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struct acpi_pci_driver **pptr = &sub_driver;
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while (*pptr)
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pptr = &(*pptr)->next;
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*pptr = driver;
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if (!driver->add)
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return 0;
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list_for_each(entry, &acpi_pci_roots) {
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struct acpi_pci_root *root;
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root = list_entry(entry, struct acpi_pci_root, node);
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2006-05-20 04:54:43 +08:00
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driver->add(root->device->handle);
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2005-04-17 06:20:36 +08:00
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n++;
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}
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return n;
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}
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2005-08-05 12:44:28 +08:00
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2005-04-17 06:20:36 +08:00
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EXPORT_SYMBOL(acpi_pci_register_driver);
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void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
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{
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struct list_head *entry;
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struct acpi_pci_driver **pptr = &sub_driver;
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while (*pptr) {
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2006-12-20 04:56:09 +08:00
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if (*pptr == driver)
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break;
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pptr = &(*pptr)->next;
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2005-04-17 06:20:36 +08:00
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}
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2006-12-20 04:56:09 +08:00
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BUG_ON(!*pptr);
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*pptr = (*pptr)->next;
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2005-04-17 06:20:36 +08:00
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if (!driver->remove)
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return;
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list_for_each(entry, &acpi_pci_roots) {
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struct acpi_pci_root *root;
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root = list_entry(entry, struct acpi_pci_root, node);
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2006-05-20 04:54:43 +08:00
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driver->remove(root->device->handle);
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2005-04-17 06:20:36 +08:00
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}
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}
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2005-08-05 12:44:28 +08:00
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2005-04-17 06:20:36 +08:00
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EXPORT_SYMBOL(acpi_pci_unregister_driver);
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static acpi_status
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2005-08-05 12:44:28 +08:00
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get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
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2005-04-17 06:20:36 +08:00
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{
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2006-10-01 06:28:50 +08:00
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int *busnr = data;
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2005-04-17 06:20:36 +08:00
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struct acpi_resource_address64 address;
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[ACPI] ACPICA 20050930
Completed a major overhaul of the Resource Manager code -
specifically, optimizations in the area of the AML/internal
resource conversion code. The code has been optimized to
simplify and eliminate duplicated code, CPU stack use has
been decreased by optimizing function parameters and local
variables, and naming conventions across the manager have
been standardized for clarity and ease of maintenance (this
includes function, parameter, variable, and struct/typedef
names.)
All Resource Manager dispatch and information tables have
been moved to a single location for clarity and ease of
maintenance. One new file was created, named "rsinfo.c".
The ACPI return macros (return_ACPI_STATUS, etc.) have
been modified to guarantee that the argument is
not evaluated twice, making them less prone to macro
side-effects. However, since there exists the possibility
of additional stack use if a particular compiler cannot
optimize them (such as in the debug generation case),
the original macros are optionally available. Note that
some invocations of the return_VALUE macro may now cause
size mismatch warnings; the return_UINT8 and return_UINT32
macros are provided to eliminate these. (From Randy Dunlap)
Implemented a new mechanism to enable debug tracing for
individual control methods. A new external interface,
acpi_debug_trace(), is provided to enable this mechanism. The
intent is to allow the host OS to easily enable and disable
tracing for problematic control methods. This interface
can be easily exposed to a user or debugger interface if
desired. See the file psxface.c for details.
acpi_ut_callocate() will now return a valid pointer if a
length of zero is specified - a length of one is used
and a warning is issued. This matches the behavior of
acpi_ut_allocate().
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2005-10-01 07:03:00 +08:00
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if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 &&
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resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 &&
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resource->type != ACPI_RESOURCE_TYPE_ADDRESS64)
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2005-04-17 06:20:36 +08:00
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return AE_OK;
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acpi_resource_to_address64(resource, &address);
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2005-08-05 12:44:28 +08:00
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if ((address.address_length > 0) &&
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(address.resource_type == ACPI_BUS_NUMBER_RANGE))
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[ACPI] ACPICA 20050930
Completed a major overhaul of the Resource Manager code -
specifically, optimizations in the area of the AML/internal
resource conversion code. The code has been optimized to
simplify and eliminate duplicated code, CPU stack use has
been decreased by optimizing function parameters and local
variables, and naming conventions across the manager have
been standardized for clarity and ease of maintenance (this
includes function, parameter, variable, and struct/typedef
names.)
All Resource Manager dispatch and information tables have
been moved to a single location for clarity and ease of
maintenance. One new file was created, named "rsinfo.c".
The ACPI return macros (return_ACPI_STATUS, etc.) have
been modified to guarantee that the argument is
not evaluated twice, making them less prone to macro
side-effects. However, since there exists the possibility
of additional stack use if a particular compiler cannot
optimize them (such as in the debug generation case),
the original macros are optionally available. Note that
some invocations of the return_VALUE macro may now cause
size mismatch warnings; the return_UINT8 and return_UINT32
macros are provided to eliminate these. (From Randy Dunlap)
Implemented a new mechanism to enable debug tracing for
individual control methods. A new external interface,
acpi_debug_trace(), is provided to enable this mechanism. The
intent is to allow the host OS to easily enable and disable
tracing for problematic control methods. This interface
can be easily exposed to a user or debugger interface if
desired. See the file psxface.c for details.
acpi_ut_callocate() will now return a valid pointer if a
length of zero is specified - a length of one is used
and a warning is issued. This matches the behavior of
acpi_ut_allocate().
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2005-10-01 07:03:00 +08:00
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*busnr = address.minimum;
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2005-04-17 06:20:36 +08:00
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return AE_OK;
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}
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2005-08-05 12:44:28 +08:00
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static acpi_status try_get_root_bridge_busnr(acpi_handle handle, int *busnum)
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2005-04-17 06:20:36 +08:00
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{
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acpi_status status;
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*busnum = -1;
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2005-08-05 12:44:28 +08:00
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status =
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acpi_walk_resources(handle, METHOD_NAME__CRS,
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get_root_bridge_busnr_callback, busnum);
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2005-04-17 06:20:36 +08:00
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if (ACPI_FAILURE(status))
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return status;
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/* Check if we really get a bus number from _CRS */
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if (*busnum == -1)
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return AE_ERROR;
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return AE_OK;
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}
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2005-08-05 12:44:28 +08:00
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static int acpi_pci_root_add(struct acpi_device *device)
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2005-04-17 06:20:36 +08:00
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{
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2005-08-05 12:44:28 +08:00
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int result = 0;
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struct acpi_pci_root *root = NULL;
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struct acpi_pci_root *tmp;
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acpi_status status = AE_OK;
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unsigned long value = 0;
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acpi_handle handle = NULL;
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2005-04-17 06:20:36 +08:00
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if (!device)
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2006-06-27 12:41:40 +08:00
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return -EINVAL;
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2005-04-17 06:20:36 +08:00
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2006-12-20 04:56:11 +08:00
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root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
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2005-04-17 06:20:36 +08:00
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if (!root)
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2006-06-27 12:41:40 +08:00
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return -ENOMEM;
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2005-04-28 15:25:45 +08:00
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INIT_LIST_HEAD(&root->node);
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2005-04-17 06:20:36 +08:00
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2006-05-20 04:54:39 +08:00
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root->device = device;
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2005-04-17 06:20:36 +08:00
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strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME);
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strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
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acpi_driver_data(device) = root;
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/*
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* TBD: Doesn't the bus driver automatically set this?
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*/
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device->ops.bind = acpi_pci_bind;
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/*
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* Segment
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* -------
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* Obtained via _SEG, if exists, otherwise assumed to be zero (0).
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*/
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2006-05-20 04:54:43 +08:00
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status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL,
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2005-08-05 12:44:28 +08:00
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&value);
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2005-04-17 06:20:36 +08:00
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switch (status) {
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case AE_OK:
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root->id.segment = (u16) value;
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break;
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case AE_NOT_FOUND:
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2005-08-05 12:44:28 +08:00
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Assuming segment 0 (no _SEG)\n"));
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2005-04-17 06:20:36 +08:00
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root->id.segment = 0;
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break;
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default:
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2006-06-27 11:58:43 +08:00
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SEG"));
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2005-04-17 06:20:36 +08:00
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result = -ENODEV;
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goto end;
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}
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/*
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* Bus
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* ---
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* Obtained via _BBN, if exists, otherwise assumed to be zero (0).
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*/
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2006-05-20 04:54:43 +08:00
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status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL,
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2005-08-05 12:44:28 +08:00
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&value);
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2005-04-17 06:20:36 +08:00
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switch (status) {
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case AE_OK:
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root->id.bus = (u16) value;
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break;
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case AE_NOT_FOUND:
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Assuming bus 0 (no _BBN)\n"));
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root->id.bus = 0;
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break;
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default:
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2006-06-27 11:58:43 +08:00
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BBN"));
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2005-04-17 06:20:36 +08:00
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result = -ENODEV;
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goto end;
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}
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/* Some systems have wrong _BBN */
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list_for_each_entry(tmp, &acpi_pci_roots, node) {
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if ((tmp->id.segment == root->id.segment)
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2005-08-05 12:44:28 +08:00
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&& (tmp->id.bus == root->id.bus)) {
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2005-04-17 06:20:36 +08:00
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int bus = 0;
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acpi_status status;
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2006-06-27 11:41:38 +08:00
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printk(KERN_ERR PREFIX
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2006-06-27 11:58:43 +08:00
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"Wrong _BBN value, reboot"
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2006-06-27 11:41:38 +08:00
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" and use option 'pci=noacpi'\n");
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2005-04-17 06:20:36 +08:00
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2006-05-20 04:54:43 +08:00
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status = try_get_root_bridge_busnr(device->handle, &bus);
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2005-04-17 06:20:36 +08:00
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if (ACPI_FAILURE(status))
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break;
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if (bus != root->id.bus) {
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2005-08-05 12:44:28 +08:00
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printk(KERN_INFO PREFIX
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"PCI _CRS %d overrides _BBN 0\n", bus);
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2005-04-17 06:20:36 +08:00
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root->id.bus = bus;
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}
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break;
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}
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}
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/*
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* Device & Function
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* -----------------
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* Obtained from _ADR (which has already been evaluated for us).
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*/
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root->id.device = device->pnp.bus_address >> 16;
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root->id.function = device->pnp.bus_address & 0xFFFF;
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/*
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* TBD: Need PCI interface for enumeration/configuration of roots.
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*/
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2005-08-05 12:44:28 +08:00
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/* TBD: Locking */
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list_add_tail(&root->node, &acpi_pci_roots);
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2005-04-17 06:20:36 +08:00
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2005-08-05 12:44:28 +08:00
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printk(KERN_INFO PREFIX "%s [%s] (%04x:%02x)\n",
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acpi_device_name(device), acpi_device_bid(device),
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root->id.segment, root->id.bus);
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2005-04-17 06:20:36 +08:00
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/*
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* Scan the Root Bridge
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* --------------------
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* Must do this prior to any attempt to bind the root device, as the
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* PCI namespace does not get created until this call is made (and
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* thus the root bridge's pci_dev does not exist).
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*/
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root->bus = pci_acpi_scan_root(device, root->id.segment, root->id.bus);
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if (!root->bus) {
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2006-06-27 11:41:38 +08:00
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printk(KERN_ERR PREFIX
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|
|
"Bus %04x:%02x not present in PCI namespace\n",
|
|
|
|
root->id.segment, root->id.bus);
|
2005-04-17 06:20:36 +08:00
|
|
|
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.
|
|
|
|
*/
|
2006-05-20 04:54:43 +08:00
|
|
|
status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (ACPI_SUCCESS(status))
|
2006-05-20 04:54:43 +08:00
|
|
|
result = acpi_pci_irq_add_prt(device->handle, root->id.segment,
|
2005-08-05 12:44:28 +08:00
|
|
|
root->id.bus);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
end:
|
2005-04-28 15:25:45 +08:00
|
|
|
if (result) {
|
|
|
|
if (!list_empty(&root->node))
|
|
|
|
list_del(&root->node);
|
2005-04-17 06:20:36 +08:00
|
|
|
kfree(root);
|
2005-04-28 15:25:45 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-06-27 12:41:40 +08:00
|
|
|
return result;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
static int acpi_pci_root_start(struct acpi_device *device)
|
2005-04-28 15:25:45 +08:00
|
|
|
{
|
2005-08-05 12:44:28 +08:00
|
|
|
struct acpi_pci_root *root;
|
2005-04-28 15:25:45 +08:00
|
|
|
|
|
|
|
|
|
|
|
list_for_each_entry(root, &acpi_pci_roots, node) {
|
2006-05-20 04:54:51 +08:00
|
|
|
if (root->device == device) {
|
2005-04-28 15:25:45 +08:00
|
|
|
pci_bus_add_devices(root->bus);
|
2006-06-27 12:41:40 +08:00
|
|
|
return 0;
|
2005-04-28 15:25:45 +08:00
|
|
|
}
|
|
|
|
}
|
2006-06-27 12:41:40 +08:00
|
|
|
return -ENODEV;
|
2005-04-28 15:25:45 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
static int acpi_pci_root_remove(struct acpi_device *device, int type)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-08-05 12:44:28 +08:00
|
|
|
struct acpi_pci_root *root = NULL;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
|
|
|
if (!device || !acpi_driver_data(device))
|
2006-06-27 12:41:40 +08:00
|
|
|
return -EINVAL;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-10-01 06:28:50 +08:00
|
|
|
root = acpi_driver_data(device);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
kfree(root);
|
|
|
|
|
2006-06-27 12:41:40 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
static int __init acpi_pci_root_init(void)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
|
|
|
|
if (acpi_pci_disabled)
|
2006-06-27 12:41:40 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* DEBUG:
|
2005-08-05 12:44:28 +08:00
|
|
|
acpi_dbg_layer = ACPI_PCI_COMPONENT;
|
|
|
|
acpi_dbg_level = 0xFFFFFFFF;
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
|
|
|
|
|
|
|
if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0)
|
2006-06-27 12:41:40 +08:00
|
|
|
return -ENODEV;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-06-27 12:41:40 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
subsys_initcall(acpi_pci_root_init);
|