Merge branch 'simplify_PRT' into release
Conflicts:
drivers/acpi/pci_irq.c
Note that this merge disables
e1d3a90846
pci, acpi: reroute PCI interrupt to legacy boot interrupt equivalent
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
commit
ec9f168fcc
|
@ -99,7 +99,7 @@ acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id)
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Device %s has PCI address %02x:%02x:%02x.%02x\n",
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"Device %s has PCI address %04x:%02x:%02x.%d\n",
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acpi_device_bid(device), id->segment, id->bus,
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id->device, id->function));
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@ -111,12 +111,11 @@ EXPORT_SYMBOL(acpi_get_pci_id);
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int acpi_pci_bind(struct acpi_device *device)
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{
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int result = 0;
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acpi_status status = AE_OK;
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struct acpi_pci_data *data = NULL;
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struct acpi_pci_data *pdata = NULL;
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char *pathname = NULL;
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struct acpi_buffer buffer = { 0, NULL };
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acpi_handle handle = NULL;
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acpi_status status;
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struct acpi_pci_data *data;
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struct acpi_pci_data *pdata;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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acpi_handle handle;
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struct pci_dev *dev;
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struct pci_bus *bus;
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@ -124,21 +123,18 @@ int acpi_pci_bind(struct acpi_device *device)
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if (!device || !device->parent)
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return -EINVAL;
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pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
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if (!pathname)
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return -ENOMEM;
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buffer.length = ACPI_PATHNAME_MAX;
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buffer.pointer = pathname;
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data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
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if (!data) {
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kfree(pathname);
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if (!data)
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return -ENOMEM;
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status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
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if (ACPI_FAILURE(status)) {
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kfree(data);
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return -ENODEV;
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}
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acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
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pathname));
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(char *)buffer.pointer));
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/*
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* Segment & Bus
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@ -166,7 +162,7 @@ int acpi_pci_bind(struct acpi_device *device)
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data->id.device = device->pnp.bus_address >> 16;
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data->id.function = device->pnp.bus_address & 0xFFFF;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %02x:%02x:%02x.%02x\n",
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %04x:%02x:%02x.%d\n",
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data->id.segment, data->id.bus, data->id.device,
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data->id.function));
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@ -196,7 +192,7 @@ int acpi_pci_bind(struct acpi_device *device)
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}
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if (!data->dev) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Device %02x:%02x:%02x.%02x not present in PCI namespace\n",
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"Device %04x:%02x:%02x.%d not present in PCI namespace\n",
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data->id.segment, data->id.bus,
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data->id.device, data->id.function));
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result = -ENODEV;
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@ -204,7 +200,7 @@ int acpi_pci_bind(struct acpi_device *device)
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}
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if (!data->dev->bus) {
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printk(KERN_ERR PREFIX
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"Device %02x:%02x:%02x.%02x has invalid 'bus' field\n",
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"Device %04x:%02x:%02x.%d has invalid 'bus' field\n",
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data->id.segment, data->id.bus,
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data->id.device, data->id.function);
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result = -ENODEV;
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|
@ -219,7 +215,7 @@ int acpi_pci_bind(struct acpi_device *device)
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*/
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if (data->dev->subordinate) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Device %02x:%02x:%02x.%02x is a PCI bridge\n",
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"Device %04x:%02x:%02x.%d is a PCI bridge\n",
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data->id.segment, data->id.bus,
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data->id.device, data->id.function));
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data->bus = data->dev->subordinate;
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|
@ -262,7 +258,7 @@ int acpi_pci_bind(struct acpi_device *device)
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}
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end:
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kfree(pathname);
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kfree(buffer.pointer);
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if (result)
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kfree(data);
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|
@ -272,25 +268,21 @@ int acpi_pci_bind(struct acpi_device *device)
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static int acpi_pci_unbind(struct acpi_device *device)
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{
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int result = 0;
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acpi_status status = AE_OK;
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struct acpi_pci_data *data = NULL;
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char *pathname = NULL;
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struct acpi_buffer buffer = { 0, NULL };
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acpi_status status;
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struct acpi_pci_data *data;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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if (!device || !device->parent)
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return -EINVAL;
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pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
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if (!pathname)
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return -ENOMEM;
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status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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buffer.length = ACPI_PATHNAME_MAX;
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buffer.pointer = pathname;
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acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
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pathname));
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kfree(pathname);
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(char *) buffer.pointer));
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kfree(buffer.pointer);
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status =
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acpi_get_data(device->handle, acpi_pci_data_handler,
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@ -322,50 +314,44 @@ acpi_pci_bind_root(struct acpi_device *device,
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struct acpi_pci_id *id, struct pci_bus *bus)
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{
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int result = 0;
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acpi_status status = AE_OK;
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acpi_status status;
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struct acpi_pci_data *data = NULL;
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char *pathname = NULL;
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struct acpi_buffer buffer = { 0, NULL };
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pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
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if (!pathname)
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return -ENOMEM;
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buffer.length = ACPI_PATHNAME_MAX;
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buffer.pointer = pathname;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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if (!device || !id || !bus) {
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kfree(pathname);
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return -EINVAL;
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}
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data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
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if (!data) {
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kfree(pathname);
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if (!data)
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return -ENOMEM;
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}
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data->id = *id;
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data->bus = bus;
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device->ops.bind = acpi_pci_bind;
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device->ops.unbind = acpi_pci_unbind;
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acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
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status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
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if (ACPI_FAILURE(status)) {
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kfree (data);
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return -ENODEV;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
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"%02x:%02x\n", pathname, id->segment, id->bus));
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"%04x:%02x\n", (char *)buffer.pointer,
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id->segment, id->bus));
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status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Unable to attach ACPI-PCI context to device %s",
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pathname));
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(char *)buffer.pointer));
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result = -ENODEV;
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goto end;
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}
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end:
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kfree(pathname);
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kfree(buffer.pointer);
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if (result != 0)
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kfree(data);
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|
|
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@ -4,6 +4,8 @@
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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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* Copyright (C) 2002 Dominik Brodowski <devel@brodo.de>
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* (c) Copyright 2008 Hewlett-Packard Development Company, L.P.
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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@ -41,29 +43,36 @@
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#define _COMPONENT ACPI_PCI_COMPONENT
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ACPI_MODULE_NAME("pci_irq");
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static struct acpi_prt_list acpi_prt;
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struct acpi_prt_entry {
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struct list_head list;
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struct acpi_pci_id id;
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u8 pin;
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acpi_handle link;
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u32 index; /* GSI, or link _CRS index */
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};
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static LIST_HEAD(acpi_prt_list);
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static DEFINE_SPINLOCK(acpi_prt_lock);
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static inline char pin_name(int pin)
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{
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return 'A' + pin - 1;
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}
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/* --------------------------------------------------------------------------
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PCI IRQ Routing Table (PRT) Support
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-------------------------------------------------------------------------- */
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static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(int segment,
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int bus,
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int device, int pin)
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static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev,
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int pin)
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{
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struct acpi_prt_entry *entry = NULL;
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struct acpi_prt_entry *entry;
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int segment = pci_domain_nr(dev->bus);
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int bus = dev->bus->number;
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int device = PCI_SLOT(dev->devfn);
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if (!acpi_prt.count)
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return NULL;
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|
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/*
|
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* Parse through all PRT entries looking for a match on the specified
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* PCI device's segment, bus, device, and pin (don't care about func).
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*
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*/
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spin_lock(&acpi_prt_lock);
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list_for_each_entry(entry, &acpi_prt.entries, node) {
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list_for_each_entry(entry, &acpi_prt_list, list) {
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if ((segment == entry->id.segment)
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&& (bus == entry->id.bus)
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&& (device == entry->id.device)
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|
@ -72,7 +81,6 @@ static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(int segment,
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return entry;
|
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}
|
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}
|
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|
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spin_unlock(&acpi_prt_lock);
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return NULL;
|
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}
|
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|
@ -124,25 +132,27 @@ struct prt_quirk {
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char *actual_source;
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};
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|
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#define PCI_INTX_PIN(c) (c - 'A' + 1)
|
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|
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/*
|
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* These systems have incorrect _PRT entries. The BIOS claims the PCI
|
||||
* interrupt at the listed segment/bus/device/pin is connected to the first
|
||||
* link device, but it is actually connected to the second.
|
||||
*/
|
||||
static struct prt_quirk prt_quirks[] = {
|
||||
{ medion_md9580, 0, 0, 9, 'A',
|
||||
{ medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'),
|
||||
"\\_SB_.PCI0.ISA_.LNKA",
|
||||
"\\_SB_.PCI0.ISA_.LNKB"},
|
||||
{ dell_optiplex, 0, 0, 0xd, 'A',
|
||||
{ dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'),
|
||||
"\\_SB_.LNKB",
|
||||
"\\_SB_.LNKA"},
|
||||
{ hp_t5710, 0, 0, 1, 'A',
|
||||
{ hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'),
|
||||
"\\_SB_.PCI0.LNK1",
|
||||
"\\_SB_.PCI0.LNK3"},
|
||||
};
|
||||
|
||||
static void
|
||||
do_prt_fixups(struct acpi_prt_entry *entry, struct acpi_pci_routing_table *prt)
|
||||
static void do_prt_fixups(struct acpi_prt_entry *entry,
|
||||
struct acpi_pci_routing_table *prt)
|
||||
{
|
||||
int i;
|
||||
struct prt_quirk *quirk;
|
||||
|
@ -158,42 +168,43 @@ do_prt_fixups(struct acpi_prt_entry *entry, struct acpi_pci_routing_table *prt)
|
|||
entry->id.segment == quirk->segment &&
|
||||
entry->id.bus == quirk->bus &&
|
||||
entry->id.device == quirk->device &&
|
||||
entry->pin + 'A' == quirk->pin &&
|
||||
entry->pin == quirk->pin &&
|
||||
!strcmp(prt->source, quirk->source) &&
|
||||
strlen(prt->source) >= strlen(quirk->actual_source)) {
|
||||
printk(KERN_WARNING PREFIX "firmware reports "
|
||||
"%04x:%02x:%02x PCI INT %c connected to %s; "
|
||||
"changing to %s\n",
|
||||
entry->id.segment, entry->id.bus,
|
||||
entry->id.device, 'A' + entry->pin,
|
||||
entry->id.device, pin_name(entry->pin),
|
||||
prt->source, quirk->actual_source);
|
||||
strcpy(prt->source, quirk->actual_source);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int
|
||||
acpi_pci_irq_add_entry(acpi_handle handle,
|
||||
int segment, int bus, struct acpi_pci_routing_table *prt)
|
||||
static int acpi_pci_irq_add_entry(acpi_handle handle, int segment, int bus,
|
||||
struct acpi_pci_routing_table *prt)
|
||||
{
|
||||
struct acpi_prt_entry *entry = NULL;
|
||||
|
||||
|
||||
if (!prt)
|
||||
return -EINVAL;
|
||||
struct acpi_prt_entry *entry;
|
||||
|
||||
entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
|
||||
if (!entry)
|
||||
return -ENOMEM;
|
||||
|
||||
/*
|
||||
* Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses
|
||||
* 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert
|
||||
* it here.
|
||||
*/
|
||||
entry->id.segment = segment;
|
||||
entry->id.bus = bus;
|
||||
entry->id.device = (prt->address >> 16) & 0xFFFF;
|
||||
entry->id.function = prt->address & 0xFFFF;
|
||||
entry->pin = prt->pin;
|
||||
entry->pin = prt->pin + 1;
|
||||
|
||||
do_prt_fixups(entry, prt);
|
||||
|
||||
entry->index = prt->source_index;
|
||||
|
||||
/*
|
||||
* Type 1: Dynamic
|
||||
* ---------------
|
||||
|
@ -207,10 +218,9 @@ acpi_pci_irq_add_entry(acpi_handle handle,
|
|||
* (e.g. exists somewhere 'below' this _PRT entry in the ACPI
|
||||
* namespace).
|
||||
*/
|
||||
if (prt->source[0]) {
|
||||
acpi_get_handle(handle, prt->source, &entry->link.handle);
|
||||
entry->link.index = prt->source_index;
|
||||
}
|
||||
if (prt->source[0])
|
||||
acpi_get_handle(handle, prt->source, &entry->link);
|
||||
|
||||
/*
|
||||
* Type 2: Static
|
||||
* --------------
|
||||
|
@ -218,84 +228,38 @@ acpi_pci_irq_add_entry(acpi_handle handle,
|
|||
* the IRQ value, which is hardwired to specific interrupt inputs on
|
||||
* the interrupt controller.
|
||||
*/
|
||||
else
|
||||
entry->link.index = prt->source_index;
|
||||
|
||||
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO,
|
||||
" %02X:%02X:%02X[%c] -> %s[%d]\n",
|
||||
" %04x:%02x:%02x[%c] -> %s[%d]\n",
|
||||
entry->id.segment, entry->id.bus,
|
||||
entry->id.device, ('A' + entry->pin), prt->source,
|
||||
entry->link.index));
|
||||
entry->id.device, pin_name(entry->pin),
|
||||
prt->source, entry->index));
|
||||
|
||||
spin_lock(&acpi_prt_lock);
|
||||
list_add_tail(&entry->node, &acpi_prt.entries);
|
||||
acpi_prt.count++;
|
||||
list_add_tail(&entry->list, &acpi_prt_list);
|
||||
spin_unlock(&acpi_prt_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
acpi_pci_irq_del_entry(int segment, int bus, struct acpi_prt_entry *entry)
|
||||
{
|
||||
if (segment == entry->id.segment && bus == entry->id.bus) {
|
||||
acpi_prt.count--;
|
||||
list_del(&entry->node);
|
||||
kfree(entry);
|
||||
}
|
||||
}
|
||||
|
||||
int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus)
|
||||
{
|
||||
acpi_status status = AE_OK;
|
||||
char *pathname = NULL;
|
||||
struct acpi_buffer buffer = { 0, NULL };
|
||||
struct acpi_pci_routing_table *prt = NULL;
|
||||
struct acpi_pci_routing_table *entry = NULL;
|
||||
static int first_time = 1;
|
||||
acpi_status status;
|
||||
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
||||
struct acpi_pci_routing_table *entry;
|
||||
|
||||
|
||||
pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
|
||||
if (!pathname)
|
||||
return -ENOMEM;
|
||||
|
||||
if (first_time) {
|
||||
acpi_prt.count = 0;
|
||||
INIT_LIST_HEAD(&acpi_prt.entries);
|
||||
first_time = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* NOTE: We're given a 'handle' to the _PRT object's parent device
|
||||
* (either a PCI root bridge or PCI-PCI bridge).
|
||||
*/
|
||||
|
||||
buffer.length = ACPI_PATHNAME_MAX;
|
||||
buffer.pointer = pathname;
|
||||
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
|
||||
/* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */
|
||||
status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
|
||||
if (ACPI_FAILURE(status))
|
||||
return -ENODEV;
|
||||
|
||||
printk(KERN_DEBUG "ACPI: PCI Interrupt Routing Table [%s._PRT]\n",
|
||||
pathname);
|
||||
(char *) buffer.pointer);
|
||||
|
||||
/*
|
||||
* Evaluate this _PRT and add its entries to our global list (acpi_prt).
|
||||
*/
|
||||
kfree(buffer.pointer);
|
||||
|
||||
buffer.length = 0;
|
||||
buffer.length = ACPI_ALLOCATE_BUFFER;
|
||||
buffer.pointer = NULL;
|
||||
kfree(pathname);
|
||||
status = acpi_get_irq_routing_table(handle, &buffer);
|
||||
if (status != AE_BUFFER_OVERFLOW) {
|
||||
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRT [%s]",
|
||||
acpi_format_exception(status)));
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
prt = kzalloc(buffer.length, GFP_KERNEL);
|
||||
if (!prt) {
|
||||
return -ENOMEM;
|
||||
}
|
||||
buffer.pointer = prt;
|
||||
|
||||
status = acpi_get_irq_routing_table(handle, &buffer);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
|
@ -305,36 +269,30 @@ int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus)
|
|||
return -ENODEV;
|
||||
}
|
||||
|
||||
entry = prt;
|
||||
|
||||
entry = buffer.pointer;
|
||||
while (entry && (entry->length > 0)) {
|
||||
acpi_pci_irq_add_entry(handle, segment, bus, entry);
|
||||
entry = (struct acpi_pci_routing_table *)
|
||||
((unsigned long)entry + entry->length);
|
||||
}
|
||||
|
||||
kfree(prt);
|
||||
|
||||
kfree(buffer.pointer);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void acpi_pci_irq_del_prt(int segment, int bus)
|
||||
{
|
||||
struct list_head *node = NULL, *n = NULL;
|
||||
struct acpi_prt_entry *entry = NULL;
|
||||
|
||||
if (!acpi_prt.count) {
|
||||
return;
|
||||
}
|
||||
struct acpi_prt_entry *entry, *tmp;
|
||||
|
||||
printk(KERN_DEBUG
|
||||
"ACPI: Delete PCI Interrupt Routing Table for %x:%x\n", segment,
|
||||
bus);
|
||||
"ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n",
|
||||
segment, bus);
|
||||
spin_lock(&acpi_prt_lock);
|
||||
list_for_each_safe(node, n, &acpi_prt.entries) {
|
||||
entry = list_entry(node, struct acpi_prt_entry, node);
|
||||
|
||||
acpi_pci_irq_del_entry(segment, bus, entry);
|
||||
list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) {
|
||||
if (segment == entry->id.segment && bus == entry->id.bus) {
|
||||
list_del(&entry->list);
|
||||
kfree(entry);
|
||||
}
|
||||
}
|
||||
spin_unlock(&acpi_prt_lock);
|
||||
}
|
||||
|
@ -342,162 +300,26 @@ void acpi_pci_irq_del_prt(int segment, int bus)
|
|||
/* --------------------------------------------------------------------------
|
||||
PCI Interrupt Routing Support
|
||||
-------------------------------------------------------------------------- */
|
||||
typedef int (*irq_lookup_func) (struct acpi_prt_entry *, int *, int *, char **);
|
||||
|
||||
static int
|
||||
acpi_pci_allocate_irq(struct acpi_prt_entry *entry,
|
||||
int *triggering, int *polarity, char **link)
|
||||
static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
|
||||
{
|
||||
int irq;
|
||||
struct acpi_prt_entry *entry;
|
||||
struct pci_dev *bridge;
|
||||
u8 bridge_pin, orig_pin = pin;
|
||||
|
||||
|
||||
if (entry->link.handle) {
|
||||
irq = acpi_pci_link_allocate_irq(entry->link.handle,
|
||||
entry->link.index, triggering,
|
||||
polarity, link);
|
||||
if (irq < 0) {
|
||||
printk(KERN_WARNING PREFIX
|
||||
"Invalid IRQ link routing entry\n");
|
||||
return -1;
|
||||
entry = acpi_pci_irq_find_prt_entry(dev, pin);
|
||||
if (entry) {
|
||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n",
|
||||
pci_name(dev), pin_name(pin)));
|
||||
return entry;
|
||||
}
|
||||
} else {
|
||||
irq = entry->link.index;
|
||||
*triggering = ACPI_LEVEL_SENSITIVE;
|
||||
*polarity = ACPI_ACTIVE_LOW;
|
||||
}
|
||||
|
||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found IRQ %d\n", irq));
|
||||
return irq;
|
||||
}
|
||||
|
||||
static int
|
||||
acpi_pci_free_irq(struct acpi_prt_entry *entry,
|
||||
int *triggering, int *polarity, char **link)
|
||||
{
|
||||
int irq;
|
||||
|
||||
if (entry->link.handle) {
|
||||
irq = acpi_pci_link_free_irq(entry->link.handle);
|
||||
} else {
|
||||
irq = entry->link.index;
|
||||
}
|
||||
return irq;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_X86_IO_APIC
|
||||
extern int noioapicquirk;
|
||||
|
||||
static int bridge_has_boot_interrupt_variant(struct pci_bus *bus)
|
||||
{
|
||||
struct pci_bus *bus_it;
|
||||
|
||||
for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) {
|
||||
if (!bus_it->self)
|
||||
return 0;
|
||||
|
||||
printk(KERN_INFO "vendor=%04x device=%04x\n", bus_it->self->vendor,
|
||||
bus_it->self->device);
|
||||
|
||||
if (bus_it->self->irq_reroute_variant)
|
||||
return bus_it->self->irq_reroute_variant;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_X86_IO_APIC */
|
||||
|
||||
/*
|
||||
* acpi_pci_irq_lookup
|
||||
* success: return IRQ >= 0
|
||||
* failure: return -1
|
||||
*/
|
||||
static int
|
||||
acpi_pci_irq_lookup(struct pci_bus *bus,
|
||||
int device,
|
||||
int pin,
|
||||
int *triggering,
|
||||
int *polarity, char **link, irq_lookup_func func)
|
||||
{
|
||||
struct acpi_prt_entry *entry = NULL;
|
||||
int segment = pci_domain_nr(bus);
|
||||
int bus_nr = bus->number;
|
||||
int ret;
|
||||
|
||||
|
||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
||||
"Searching for PRT entry for %02x:%02x:%02x[%c]\n",
|
||||
segment, bus_nr, device, ('A' + pin)));
|
||||
|
||||
entry = acpi_pci_irq_find_prt_entry(segment, bus_nr, device, pin);
|
||||
if (!entry) {
|
||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PRT entry not found\n"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = func(entry, triggering, polarity, link);
|
||||
|
||||
#ifdef CONFIG_X86_IO_APIC
|
||||
/*
|
||||
* Some chipsets (e.g. intel 6700PXH) generate a legacy INTx when the
|
||||
* IRQ entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel
|
||||
* does during interrupt handling). When this INTx generation cannot be
|
||||
* disabled, we reroute these interrupts to their legacy equivalent to
|
||||
* get rid of spurious interrupts.
|
||||
*/
|
||||
if (!noioapicquirk) {
|
||||
switch (bridge_has_boot_interrupt_variant(bus)) {
|
||||
case 0:
|
||||
/* no rerouting necessary */
|
||||
break;
|
||||
|
||||
case INTEL_IRQ_REROUTE_VARIANT:
|
||||
/*
|
||||
* Remap according to INTx routing table in 6700PXH
|
||||
* specs, intel order number 302628-002, section
|
||||
* 2.15.2. Other chipsets (80332, ...) have the same
|
||||
* mapping and are handled here as well.
|
||||
*/
|
||||
printk(KERN_INFO "pci irq %d -> rerouted to legacy "
|
||||
"irq %d\n", ret, (ret % 4) + 16);
|
||||
ret = (ret % 4) + 16;
|
||||
break;
|
||||
|
||||
default:
|
||||
printk(KERN_INFO "not rerouting irq %d to legacy irq: "
|
||||
"unknown mapping\n", ret);
|
||||
break;
|
||||
}
|
||||
}
|
||||
#endif /* CONFIG_X86_IO_APIC */
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* acpi_pci_irq_derive
|
||||
* success: return IRQ >= 0
|
||||
* failure: return < 0
|
||||
*/
|
||||
static int
|
||||
acpi_pci_irq_derive(struct pci_dev *dev,
|
||||
int pin,
|
||||
int *triggering,
|
||||
int *polarity, char **link, irq_lookup_func func)
|
||||
{
|
||||
struct pci_dev *bridge = dev;
|
||||
int irq = -1;
|
||||
u8 bridge_pin = 0, orig_pin = pin;
|
||||
|
||||
|
||||
if (!dev)
|
||||
return -EINVAL;
|
||||
|
||||
/*
|
||||
* Attempt to derive an IRQ for this device from a parent bridge's
|
||||
* PCI interrupt routing entry (eg. yenta bridge and add-in card bridge).
|
||||
*/
|
||||
while (irq < 0 && bridge->bus->self) {
|
||||
pin = (pin + PCI_SLOT(bridge->devfn)) % 4;
|
||||
bridge = bridge->bus->self;
|
||||
bridge = dev->bus->self;
|
||||
while (bridge) {
|
||||
pin = (((pin - 1) + PCI_SLOT(dev->devfn)) % 4) + 1;
|
||||
|
||||
if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) {
|
||||
/* PC card has the same IRQ as its cardbridge */
|
||||
|
@ -506,50 +328,40 @@ acpi_pci_irq_derive(struct pci_dev *dev,
|
|||
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
||||
"No interrupt pin configured for device %s\n",
|
||||
pci_name(bridge)));
|
||||
return -1;
|
||||
return NULL;
|
||||
}
|
||||
/* Pin is from 0 to 3 */
|
||||
bridge_pin--;
|
||||
pin = bridge_pin;
|
||||
}
|
||||
|
||||
irq = acpi_pci_irq_lookup(bridge->bus, PCI_SLOT(bridge->devfn),
|
||||
pin, triggering, polarity,
|
||||
link, func);
|
||||
entry = acpi_pci_irq_find_prt_entry(bridge, pin);
|
||||
if (entry) {
|
||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
||||
"Derived GSI for %s INT %c from %s\n",
|
||||
pci_name(dev), pin_name(orig_pin),
|
||||
pci_name(bridge)));
|
||||
return entry;
|
||||
}
|
||||
|
||||
dev = bridge;
|
||||
bridge = dev->bus->self;
|
||||
}
|
||||
|
||||
if (irq < 0) {
|
||||
dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n",
|
||||
'A' + orig_pin);
|
||||
return -1;
|
||||
pin_name(orig_pin));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Derive IRQ %d for device %s from %s\n",
|
||||
irq, pci_name(dev), pci_name(bridge)));
|
||||
|
||||
return irq;
|
||||
}
|
||||
|
||||
/*
|
||||
* acpi_pci_irq_enable
|
||||
* success: return 0
|
||||
* failure: return < 0
|
||||
*/
|
||||
|
||||
int acpi_pci_irq_enable(struct pci_dev *dev)
|
||||
{
|
||||
int irq = 0;
|
||||
u8 pin = 0;
|
||||
struct acpi_prt_entry *entry;
|
||||
int gsi;
|
||||
u8 pin;
|
||||
int triggering = ACPI_LEVEL_SENSITIVE;
|
||||
int polarity = ACPI_ACTIVE_LOW;
|
||||
char *link = NULL;
|
||||
char link_desc[16];
|
||||
int rc;
|
||||
|
||||
|
||||
if (!dev)
|
||||
return -EINVAL;
|
||||
|
||||
pin = dev->pin;
|
||||
if (!pin) {
|
||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
||||
|
@ -557,31 +369,9 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
|
|||
pci_name(dev)));
|
||||
return 0;
|
||||
}
|
||||
pin--;
|
||||
|
||||
if (!dev->bus) {
|
||||
dev_err(&dev->dev, "invalid (NULL) 'bus' field\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/*
|
||||
* First we check the PCI IRQ routing table (PRT) for an IRQ. PRT
|
||||
* values override any BIOS-assigned IRQs set during boot.
|
||||
*/
|
||||
irq = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin,
|
||||
&triggering, &polarity, &link,
|
||||
acpi_pci_allocate_irq);
|
||||
|
||||
/*
|
||||
* If no PRT entry was found, we'll try to derive an IRQ from the
|
||||
* device's parent bridge.
|
||||
*/
|
||||
if (irq < 0)
|
||||
irq = acpi_pci_irq_derive(dev, pin, &triggering,
|
||||
&polarity, &link,
|
||||
acpi_pci_allocate_irq);
|
||||
|
||||
if (irq < 0) {
|
||||
entry = acpi_pci_irq_lookup(dev, pin);
|
||||
if (!entry) {
|
||||
/*
|
||||
* IDE legacy mode controller IRQs are magic. Why do compat
|
||||
* extensions always make such a nasty mess.
|
||||
|
@ -590,12 +380,24 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
|
|||
(dev->class & 0x05) == 0)
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (entry) {
|
||||
if (entry->link)
|
||||
gsi = acpi_pci_link_allocate_irq(entry->link,
|
||||
entry->index,
|
||||
&triggering, &polarity,
|
||||
&link);
|
||||
else
|
||||
gsi = entry->index;
|
||||
} else
|
||||
gsi = -1;
|
||||
|
||||
/*
|
||||
* No IRQ known to the ACPI subsystem - maybe the BIOS /
|
||||
* driver reported one, then use it. Exit in any case.
|
||||
*/
|
||||
if (irq < 0) {
|
||||
dev_warn(&dev->dev, "PCI INT %c: no GSI", 'A' + pin);
|
||||
if (gsi < 0) {
|
||||
dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin));
|
||||
/* Interrupt Line values above 0xF are forbidden */
|
||||
if (dev->irq > 0 && (dev->irq <= 0xF)) {
|
||||
printk(" - using IRQ %d\n", dev->irq);
|
||||
|
@ -608,10 +410,10 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
|
|||
}
|
||||
}
|
||||
|
||||
rc = acpi_register_gsi(irq, triggering, polarity);
|
||||
rc = acpi_register_gsi(gsi, triggering, polarity);
|
||||
if (rc < 0) {
|
||||
dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n",
|
||||
'A' + pin);
|
||||
pin_name(pin));
|
||||
return rc;
|
||||
}
|
||||
dev->irq = rc;
|
||||
|
@ -622,7 +424,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
|
|||
link_desc[0] = '\0';
|
||||
|
||||
dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n",
|
||||
'A' + pin, link_desc, irq,
|
||||
pin_name(pin), link_desc, gsi,
|
||||
(triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge",
|
||||
(polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq);
|
||||
|
||||
|
@ -636,42 +438,28 @@ void __attribute__ ((weak)) acpi_unregister_gsi(u32 i)
|
|||
|
||||
void acpi_pci_irq_disable(struct pci_dev *dev)
|
||||
{
|
||||
int gsi = 0;
|
||||
u8 pin = 0;
|
||||
int triggering = ACPI_LEVEL_SENSITIVE;
|
||||
int polarity = ACPI_ACTIVE_LOW;
|
||||
|
||||
|
||||
if (!dev || !dev->bus)
|
||||
return;
|
||||
struct acpi_prt_entry *entry;
|
||||
int gsi;
|
||||
u8 pin;
|
||||
|
||||
pin = dev->pin;
|
||||
if (!pin)
|
||||
return;
|
||||
pin--;
|
||||
|
||||
/*
|
||||
* First we check the PCI IRQ routing table (PRT) for an IRQ.
|
||||
*/
|
||||
gsi = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin,
|
||||
&triggering, &polarity, NULL,
|
||||
acpi_pci_free_irq);
|
||||
/*
|
||||
* If no PRT entry was found, we'll try to derive an IRQ from the
|
||||
* device's parent bridge.
|
||||
*/
|
||||
if (gsi < 0)
|
||||
gsi = acpi_pci_irq_derive(dev, pin,
|
||||
&triggering, &polarity, NULL,
|
||||
acpi_pci_free_irq);
|
||||
if (gsi < 0)
|
||||
entry = acpi_pci_irq_lookup(dev, pin);
|
||||
if (!entry)
|
||||
return;
|
||||
|
||||
if (entry->link)
|
||||
gsi = acpi_pci_link_free_irq(entry->link);
|
||||
else
|
||||
gsi = entry->index;
|
||||
|
||||
/*
|
||||
* TBD: It might be worth clearing dev->irq by magic constant
|
||||
* (e.g. PCI_UNDEFINED_IRQ).
|
||||
*/
|
||||
|
||||
dev_info(&dev->dev, "PCI INT %c disabled\n", 'A' + pin);
|
||||
dev_info(&dev->dev, "PCI INT %c disabled\n", pin_name(pin));
|
||||
acpi_unregister_gsi(gsi);
|
||||
}
|
||||
|
|
|
@ -71,9 +71,6 @@
|
|||
#define ACPI_EXPORT_SYMBOL(symbol) EXPORT_SYMBOL(symbol);
|
||||
#define strtoul simple_strtoul
|
||||
|
||||
/* Full namespace pathname length limit - arbitrary */
|
||||
#define ACPI_PATHNAME_MAX 256
|
||||
|
||||
#else /* !__KERNEL__ */
|
||||
|
||||
#include <stdarg.h>
|
||||
|
|
|
@ -131,22 +131,6 @@ extern int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity);
|
|||
*/
|
||||
void acpi_unregister_gsi (u32 gsi);
|
||||
|
||||
struct acpi_prt_entry {
|
||||
struct list_head node;
|
||||
struct acpi_pci_id id;
|
||||
u8 pin;
|
||||
struct {
|
||||
acpi_handle handle;
|
||||
u32 index;
|
||||
} link;
|
||||
u32 irq;
|
||||
};
|
||||
|
||||
struct acpi_prt_list {
|
||||
int count;
|
||||
struct list_head entries;
|
||||
};
|
||||
|
||||
struct pci_dev;
|
||||
|
||||
int acpi_pci_irq_enable (struct pci_dev *dev);
|
||||
|
|
Loading…
Reference in a new issue