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_bus_get_private_data(acpi_handle handle, void **data)
{
acpi_status status;
if (!*data)
return -EINVAL;
status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
if (ACPI_FAILURE(status)) {
acpi_handle_debug(handle, "No context for object\n");
return -ENODEV;
}
return 0;
}
int acpi_bus_get_private_data(acpi_handle handle, void **data)
{
acpi_status status = AE_OK;
if (!*data)
return -EINVAL;
status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
if (ACPI_FAILURE(status) || !*data) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
handle));
return -ENODEV;
}
return 0;
}
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_bus_get_device(acpi_handle handle, struct acpi_device **device)
{
acpi_status status;
if (!device)
return -EINVAL;
/* TBD: Support fixed-feature devices */
status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
if (ACPI_FAILURE(status) || !*device) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
handle));
return -ENODEV;
}
return 0;
}
static int acpi_pci_unbind(struct acpi_device *device)
{
int result = 0;
acpi_status status;
struct acpi_pci_data *data;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
if (!device || !device->parent)
return -EINVAL;
status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
if (ACPI_FAILURE(status))
return -ENODEV;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
(char *) buffer.pointer));
kfree(buffer.pointer);
status =
acpi_get_data(device->handle, acpi_pci_data_handler,
(void **)&data);
if (ACPI_FAILURE(status)) {
result = -ENODEV;
goto end;
}
status = acpi_detach_data(device->handle, acpi_pci_data_handler);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Unable to detach data from device %s",
acpi_device_bid(device)));
result = -ENODEV;
goto end;
}
if (data->dev->subordinate) {
acpi_pci_irq_del_prt(data->id.segment, data->bus->number);
}
pci_dev_put(data->dev);
kfree(data);
end:
return result;
}
/**
* acpi_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_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;
if (!id)
return AE_BAD_PARAMETER;
result = acpi_bus_get_device(handle, &device);
if (result) {
printk(KERN_ERR PREFIX
"Invalid ACPI Bus context for device %s\n",
acpi_device_bid(device));
return AE_NOT_EXIST;
}
status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data);
if (ACPI_FAILURE(status) || !data) {
ACPI_EXCEPTION((AE_INFO, status,
"Invalid ACPI-PCI context for device %s",
acpi_device_bid(device)));
return 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 %04x:%02x:%02x.%d\n",
acpi_device_bid(device), id->segment, id->bus,
id->device, id->function));
return AE_OK;
}
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE("acpi_bus_get_device");
if (!device)
return_VALUE(-EINVAL);
/* TBD: Support fixed-feature devices */
status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
if (ACPI_FAILURE(status) || !*device) {
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "No context for object [%p]\n",
handle));
return_VALUE(-ENODEV);
}
return_VALUE(0);
}
/**
* acpi_gpiochip_free_interrupts() - Free GPIO _EVT ACPI event interrupts.
* @chip: gpio chip
*
* Free interrupts associated with the _EVT method for the given GPIO chip.
*
* The remaining ACPI event interrupts associated with the chip are freed
* automatically.
*/
void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
{
acpi_handle handle;
acpi_status status;
struct list_head *evt_pins;
struct acpi_gpio_evt_pin *evt_pin, *ep;
if (!chip->dev || !chip->to_irq)
return;
handle = ACPI_HANDLE(chip->dev);
if (!handle)
return;
status = acpi_get_data(handle, acpi_gpio_evt_dh, (void **)&evt_pins);
if (ACPI_FAILURE(status))
return;
list_for_each_entry_safe_reverse(evt_pin, ep, evt_pins, node) {
devm_free_irq(chip->dev, evt_pin->irq, evt_pin);
list_del(&evt_pin->node);
kfree(evt_pin);
}
int acpi_pci_bind(struct acpi_device *device)
{
int result = 0;
acpi_status status;
struct acpi_pci_data *data;
struct acpi_pci_data *pdata;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_handle handle;
if (!device || !device->parent)
return -EINVAL;
data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
if (ACPI_FAILURE(status)) {
kfree(data);
return -ENODEV;
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
(char *)buffer.pointer));
/*
* 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_EXCEPTION((AE_INFO, status,
"Invalid ACPI-PCI context for parent device %s",
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 %04x:%02x:%02x.%d\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_get_slot(pdata->bus,
PCI_DEVFN(data->id.device, data->id.function));
if (!data->dev) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Device %04x:%02x:%02x.%d 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) {
printk(KERN_ERR PREFIX
"Device %04x:%02x:%02x.%d 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 %04x:%02x:%02x.%d 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_EXCEPTION((AE_INFO, status,
"Unable to attach ACPI-PCI context to device %s",
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(buffer.pointer);
if (result) {
pci_dev_put(data->dev);
kfree(data);
}
return result;
}
