void acpi_rs_dump_resource_list(struct acpi_resource *resource_list)
{
u32 count = 0;
u32 type;
ACPI_FUNCTION_ENTRY();
/* Check if debug output enabled */
if (!ACPI_IS_DEBUG_ENABLED(ACPI_LV_RESOURCES, _COMPONENT)) {
return;
}
/* Walk list and dump all resource descriptors (END_TAG terminates) */
do {
acpi_os_printf("\n[%02X] ", count);
count++;
/* Validate Type before dispatch */
type = resource_list->type;
if (type > ACPI_RESOURCE_TYPE_MAX) {
acpi_os_printf
("Invalid descriptor type (%X) in resource list\n",
resource_list->type);
return;
}
/* Sanity check the length. It must not be zero, or we loop forever */
if (!resource_list->length) {
acpi_os_printf
("Invalid zero length descriptor in resource list\n");
return;
}
/* Dump the resource descriptor */
if (type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
acpi_rs_dump_descriptor(&resource_list->data,
acpi_gbl_dump_serial_bus_dispatch
[resource_list->data.
common_serial_bus.type]);
} else {
acpi_rs_dump_descriptor(&resource_list->data,
acpi_gbl_dump_resource_dispatch
[type]);
}
/* Point to the next resource structure */
resource_list = ACPI_NEXT_RESOURCE(resource_list);
/* Exit when END_TAG descriptor is reached */
} while (type != ACPI_RESOURCE_TYPE_END_TAG);
}
static void acpi_virtual_gpio_request_interrupts(struct virtual_gpio_data *gd)
{
struct device *dev = &gd->pdev->dev;
struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL};
struct acpi_resource *res;
acpi_handle handle, ev_handle;
acpi_status status;
unsigned int pin;
int ret;
char ev_name[5];
handle = ACPI_HANDLE(dev);
if (!handle)
return;
status = acpi_get_event_resources(handle, &buf);
if (ACPI_FAILURE(status))
return;
/*
* If a GPIO interrupt has an ACPI event handler method, set
* up an interrupt handler that calls the ACPI event handler.
*/
for (res = buf.pointer;
res && (res->type != ACPI_RESOURCE_TYPE_END_TAG);
res = ACPI_NEXT_RESOURCE(res)) {
if (res->type != ACPI_RESOURCE_TYPE_GPIO ||
res->data.gpio.connection_type !=
ACPI_RESOURCE_GPIO_TYPE_INT)
continue;
pin = res->data.gpio.pin_table[0];
dev_info(dev, "virtual gpio pin = %d\n", pin);
if (pin > 255)
continue;
sprintf(ev_name, "_%c%02X",
res->data.gpio.triggering ? 'E' : 'L', pin);
status = acpi_get_handle(handle, ev_name, &ev_handle);
if (ACPI_FAILURE(status))
continue;
/* Assume BIOS sets the triggering, so no flags */
ret = devm_request_irq(dev, gd->irq,
virtual_gpio_irq_handler_isr,
0,
VIRTUAL_GPIO_DRIVER_NAME,
ev_handle);
if (ret)
dev_err(dev,
"Failed to request IRQ %d ACPI event handler\n",
gd->irq);
}
}
static ACPI_STATUS
acpi_pci_link_route_irqs(device_t dev)
{
struct acpi_pci_link_softc *sc;
ACPI_RESOURCE *resource, *end;
ACPI_BUFFER srsbuf;
ACPI_STATUS status;
struct link *link;
int i;
ACPI_SERIAL_ASSERT(pci_link);
sc = device_get_softc(dev);
if (sc->pl_crs_bad)
status = acpi_pci_link_srs_from_links(sc, &srsbuf);
else
status = acpi_pci_link_srs_from_crs(sc, &srsbuf);
/* Write out new resources via _SRS. */
status = AcpiSetCurrentResources(acpi_get_handle(dev), &srsbuf);
if (ACPI_FAILURE(status)) {
device_printf(dev, "Unable to route IRQs: %s\n",
AcpiFormatException(status));
AcpiOsFree(srsbuf.Pointer);
return (status);
}
/*
* Perform acpi_config_intr() on each IRQ resource if it was just
* routed for the first time.
*/
link = sc->pl_links;
i = 0;
resource = (ACPI_RESOURCE *)srsbuf.Pointer;
end = (ACPI_RESOURCE *)((char *)srsbuf.Pointer + srsbuf.Length);
for (;;) {
if (resource->Type == ACPI_RESOURCE_TYPE_END_TAG)
break;
switch (resource->Type) {
case ACPI_RESOURCE_TYPE_IRQ:
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
MPASS(i < sc->pl_num_links);
/*
* Only configure the interrupt and update the
* weights if this link has a valid IRQ and was
* previously unrouted.
*/
if (!link->l_routed &&
PCI_INTERRUPT_VALID(link->l_irq)) {
link->l_routed = TRUE;
acpi_config_intr(dev, resource);
pci_link_interrupt_weights[link->l_irq] +=
link->l_references;
}
link++;
i++;
break;
}
resource = ACPI_NEXT_RESOURCE(resource);
if (resource >= end)
break;
}
AcpiOsFree(srsbuf.Pointer);
return (AE_OK);
}
static ACPI_STATUS
acpi_pci_link_srs_from_crs(struct acpi_pci_link_softc *sc, ACPI_BUFFER *srsbuf)
{
ACPI_RESOURCE *end, *res;
ACPI_STATUS status;
struct link *link;
int i, in_dpf;
/* Fetch the _CRS. */
ACPI_SERIAL_ASSERT(pci_link);
srsbuf->Pointer = NULL;
srsbuf->Length = ACPI_ALLOCATE_BUFFER;
status = AcpiGetCurrentResources(acpi_get_handle(sc->pl_dev), srsbuf);
if (ACPI_SUCCESS(status) && srsbuf->Pointer == NULL)
status = AE_NO_MEMORY;
if (ACPI_FAILURE(status)) {
if (bootverbose)
device_printf(sc->pl_dev,
"Unable to fetch current resources: %s\n",
AcpiFormatException(status));
return (status);
}
/* Fill in IRQ resources via link structures. */
link = sc->pl_links;
i = 0;
in_dpf = DPF_OUTSIDE;
res = (ACPI_RESOURCE *)srsbuf->Pointer;
end = (ACPI_RESOURCE *)((char *)srsbuf->Pointer + srsbuf->Length);
for (;;) {
switch (res->Type) {
case ACPI_RESOURCE_TYPE_START_DEPENDENT:
switch (in_dpf) {
case DPF_OUTSIDE:
/* We've started the first DPF. */
in_dpf = DPF_FIRST;
break;
case DPF_FIRST:
/* We've started the second DPF. */
panic(
"%s: Multiple dependent functions within a current resource",
__func__);
break;
}
break;
case ACPI_RESOURCE_TYPE_END_DEPENDENT:
/* We are finished with DPF parsing. */
KASSERT(in_dpf != DPF_OUTSIDE,
("%s: end dpf when not parsing a dpf", __func__));
in_dpf = DPF_OUTSIDE;
break;
case ACPI_RESOURCE_TYPE_IRQ:
MPASS(i < sc->pl_num_links);
res->Data.Irq.InterruptCount = 1;
if (PCI_INTERRUPT_VALID(link->l_irq)) {
KASSERT(link->l_irq < NUM_ISA_INTERRUPTS,
("%s: can't put non-ISA IRQ %d in legacy IRQ resource type",
__func__, link->l_irq));
res->Data.Irq.Interrupts[0] = link->l_irq;
} else
res->Data.Irq.Interrupts[0] = 0;
link++;
i++;
break;
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
MPASS(i < sc->pl_num_links);
res->Data.ExtendedIrq.InterruptCount = 1;
if (PCI_INTERRUPT_VALID(link->l_irq))
res->Data.ExtendedIrq.Interrupts[0] =
link->l_irq;
else
res->Data.ExtendedIrq.Interrupts[0] = 0;
link++;
i++;
break;
}
if (res->Type == ACPI_RESOURCE_TYPE_END_TAG)
break;
res = ACPI_NEXT_RESOURCE(res);
if (res >= end)
break;
}
return (AE_OK);
}
void
AcpiRsDumpResourceList (
ACPI_RESOURCE *ResourceList)
{
UINT32 Count = 0;
UINT32 Type;
ACPI_FUNCTION_ENTRY ();
/* Check if debug output enabled */
if (!ACPI_IS_DEBUG_ENABLED (ACPI_LV_RESOURCES, _COMPONENT))
{
return;
}
/* Walk list and dump all resource descriptors (END_TAG terminates) */
do
{
AcpiOsPrintf ("\n[%02X] ", Count);
Count++;
/* Validate Type before dispatch */
Type = ResourceList->Type;
if (Type > ACPI_RESOURCE_TYPE_MAX)
{
AcpiOsPrintf (
"Invalid descriptor type (%X) in resource list\n",
ResourceList->Type);
return;
}
/* Sanity check the length. It must not be zero, or we loop forever */
if (!ResourceList->Length)
{
AcpiOsPrintf (
"Invalid zero length descriptor in resource list\n");
return;
}
/* Dump the resource descriptor */
if (Type == ACPI_RESOURCE_TYPE_SERIAL_BUS)
{
AcpiRsDumpDescriptor (&ResourceList->Data,
AcpiGbl_DumpSerialBusDispatch[
ResourceList->Data.CommonSerialBus.Type]);
}
else
{
AcpiRsDumpDescriptor (&ResourceList->Data,
AcpiGbl_DumpResourceDispatch[Type]);
}
/* Point to the next resource structure */
ResourceList = ACPI_NEXT_RESOURCE (ResourceList);
/* Exit when END_TAG descriptor is reached */
} while (Type != ACPI_RESOURCE_TYPE_END_TAG);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_convert_aml_to_resources
*
* PARAMETERS: acpi_walk_aml_callback
* resource_ptr - Pointer to the buffer that will
* contain the output structures
*
* RETURN: Status
*
* DESCRIPTION: Convert an AML resource to an internal representation of the
* resource that is aligned and easier to access.
*
******************************************************************************/
acpi_status
acpi_rs_convert_aml_to_resources(u8 * aml,
u32 length,
u32 offset, u8 resource_index, void **context)
{
struct acpi_resource **resource_ptr =
ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context);
struct acpi_resource *resource;
union aml_resource *aml_resource;
struct acpi_rsconvert_info *conversion_table;
acpi_status status;
ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources);
/*
* Check that the input buffer and all subsequent pointers into it
* are aligned on a native word boundary. Most important on IA64
*/
resource = *resource_ptr;
if (ACPI_IS_MISALIGNED(resource)) {
ACPI_WARNING((AE_INFO,
"Misaligned resource pointer %p", resource));
}
/* Get the appropriate conversion info table */
aml_resource = ACPI_CAST_PTR(union aml_resource, aml);
if (acpi_ut_get_resource_type(aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) {
if (aml_resource->common_serial_bus.type >
AML_RESOURCE_MAX_SERIALBUSTYPE) {
conversion_table = NULL;
} else {
/* This is an I2C, SPI, or UART serial_bus descriptor */
conversion_table =
acpi_gbl_convert_resource_serial_bus_dispatch
[aml_resource->common_serial_bus.type];
}
} else {
conversion_table =
acpi_gbl_get_resource_dispatch[resource_index];
}
if (!conversion_table) {
ACPI_ERROR((AE_INFO,
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
resource_index));
return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
}
/* Convert the AML byte stream resource to a local resource struct */
status =
acpi_rs_convert_aml_to_resource(resource, aml_resource,
conversion_table);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Could not convert AML resource (Type 0x%X)",
*aml));
return_ACPI_STATUS(status);
}
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
"Type %.2X, AmlLength %.2X InternalLength %.2X\n",
acpi_ut_get_resource_type(aml), length,
resource->length));
/* Point to the next structure in the output buffer */
*resource_ptr = ACPI_NEXT_RESOURCE(resource);
return_ACPI_STATUS(AE_OK);
}
acpi_status
acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
acpi_size aml_size_needed, u8 * output_buffer)
{
u8 *aml = output_buffer;
u8 *end_aml = output_buffer + aml_size_needed;
struct acpi_rsconvert_info *conversion_table;
acpi_status status;
ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml);
/* Walk the resource descriptor list, convert each descriptor */
while (aml < end_aml) {
/* Validate the (internal) Resource Type */
if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
ACPI_ERROR((AE_INFO,
"Invalid descriptor type (0x%X) in resource list",
resource->type));
return_ACPI_STATUS(AE_BAD_DATA);
}
/* Sanity check the length. It must not be zero, or we loop forever */
if (!resource->length) {
ACPI_ERROR((AE_INFO,
"Invalid zero length descriptor in resource list\n"));
return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
}
/* Perform the conversion */
if (resource->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
if (resource->data.common_serial_bus.type >
AML_RESOURCE_MAX_SERIALBUSTYPE) {
conversion_table = NULL;
} else {
/* This is an I2C, SPI, or UART serial_bus descriptor */
conversion_table =
acpi_gbl_convert_resource_serial_bus_dispatch
[resource->data.common_serial_bus.type];
}
} else {
conversion_table =
acpi_gbl_set_resource_dispatch[resource->type];
}
if (!conversion_table) {
ACPI_ERROR((AE_INFO,
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
resource->type));
return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
}
status = acpi_rs_convert_resource_to_aml(resource,
ACPI_CAST_PTR(union
aml_resource,
aml),
conversion_table);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Could not convert resource (type 0x%X) to AML",
resource->type));
return_ACPI_STATUS(status);
}
/* Perform final sanity check on the new AML resource descriptor */
status =
acpi_ut_validate_resource(NULL,
ACPI_CAST_PTR(union aml_resource,
aml), NULL);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Check for end-of-list, normal exit */
if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
/* An End Tag indicates the end of the input Resource Template */
return_ACPI_STATUS(AE_OK);
}
/*
* Extract the total length of the new descriptor and set the
* Aml to point to the next (output) resource descriptor
*/
aml += acpi_ut_get_descriptor_length(aml);
/* Point to the next input resource descriptor */
resource = ACPI_NEXT_RESOURCE(resource);
}
/* Completed buffer, but did not find an end_tag resource descriptor */
return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}
ACPI_STATUS
AcpiRsConvertAmlToResources (
UINT8 *Aml,
UINT32 Length,
UINT32 Offset,
UINT8 ResourceIndex,
void **Context)
{
ACPI_RESOURCE **ResourcePtr = ACPI_CAST_INDIRECT_PTR (
ACPI_RESOURCE, Context);
ACPI_RESOURCE *Resource;
AML_RESOURCE *AmlResource;
ACPI_RSCONVERT_INFO *ConversionTable;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (RsConvertAmlToResources);
/*
* Check that the input buffer and all subsequent pointers into it
* are aligned on a native word boundary. Most important on IA64
*/
Resource = *ResourcePtr;
if (ACPI_IS_MISALIGNED (Resource))
{
ACPI_WARNING ((AE_INFO,
"Misaligned resource pointer %p", Resource));
}
/* Get the appropriate conversion info table */
AmlResource = ACPI_CAST_PTR (AML_RESOURCE, Aml);
if (AcpiUtGetResourceType (Aml) == ACPI_RESOURCE_NAME_SERIAL_BUS)
{
if (AmlResource->CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE)
{
ConversionTable = NULL;
}
else
{
/* This is an I2C, SPI, or UART SerialBus descriptor */
ConversionTable =
AcpiGbl_ConvertResourceSerialBusDispatch[
AmlResource->CommonSerialBus.Type];
}
}
else
{
ConversionTable =
AcpiGbl_GetResourceDispatch[ResourceIndex];
}
if (!ConversionTable)
{
ACPI_ERROR ((AE_INFO,
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
ResourceIndex));
return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
}
/* Convert the AML byte stream resource to a local resource struct */
Status = AcpiRsConvertAmlToResource (
Resource, AmlResource, ConversionTable);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not convert AML resource (Type 0x%X)", *Aml));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
"Type %.2X, AmlLength %.2X InternalLength %.2X\n",
AcpiUtGetResourceType (Aml), Length,
Resource->Length));
/* Point to the next structure in the output buffer */
*ResourcePtr = ACPI_NEXT_RESOURCE (Resource);
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiRsConvertResourcesToAml (
ACPI_RESOURCE *Resource,
ACPI_SIZE AmlSizeNeeded,
UINT8 *OutputBuffer)
{
UINT8 *Aml = OutputBuffer;
UINT8 *EndAml = OutputBuffer + AmlSizeNeeded;
ACPI_RSCONVERT_INFO *ConversionTable;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (RsConvertResourcesToAml);
/* Walk the resource descriptor list, convert each descriptor */
while (Aml < EndAml)
{
/* Validate the (internal) Resource Type */
if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
{
ACPI_ERROR ((AE_INFO,
"Invalid descriptor type (0x%X) in resource list",
Resource->Type));
return_ACPI_STATUS (AE_BAD_DATA);
}
/* Sanity check the length. It must not be zero, or we loop forever */
if (!Resource->Length)
{
ACPI_ERROR ((AE_INFO,
"Invalid zero length descriptor in resource list\n"));
return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
}
/* Perform the conversion */
if (Resource->Type == ACPI_RESOURCE_TYPE_SERIAL_BUS)
{
if (Resource->Data.CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE)
{
ConversionTable = NULL;
}
else
{
/* This is an I2C, SPI, or UART SerialBus descriptor */
ConversionTable = AcpiGbl_ConvertResourceSerialBusDispatch[
Resource->Data.CommonSerialBus.Type];
}
}
else
{
ConversionTable = AcpiGbl_SetResourceDispatch[Resource->Type];
}
if (!ConversionTable)
{
ACPI_ERROR ((AE_INFO,
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
Resource->Type));
return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
}
Status = AcpiRsConvertResourceToAml (Resource,
ACPI_CAST_PTR (AML_RESOURCE, Aml),
ConversionTable);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not convert resource (type 0x%X) to AML",
Resource->Type));
return_ACPI_STATUS (Status);
}
/* Perform final sanity check on the new AML resource descriptor */
Status = AcpiUtValidateResource (NULL,
ACPI_CAST_PTR (AML_RESOURCE, Aml), NULL);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Check for end-of-list, normal exit */
if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG)
{
/* An End Tag indicates the end of the input Resource Template */
return_ACPI_STATUS (AE_OK);
}
/*
* Extract the total length of the new descriptor and set the
* Aml to point to the next (output) resource descriptor
*/
Aml += AcpiUtGetDescriptorLength (Aml);
/* Point to the next input resource descriptor */
Resource = ACPI_NEXT_RESOURCE (Resource);
}
/* Completed buffer, but did not find an EndTag resource descriptor */
return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
}
acpi_status
acpi_walk_resources (
acpi_handle device_handle,
char *path,
ACPI_WALK_RESOURCE_CALLBACK user_function,
void *context)
{
acpi_status status;
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
struct acpi_resource *resource;
struct acpi_resource *buffer_end;
ACPI_FUNCTION_TRACE ("acpi_walk_resources");
if (!device_handle ||
(ACPI_STRNCMP (path, METHOD_NAME__CRS, sizeof (METHOD_NAME__CRS)) &&
ACPI_STRNCMP (path, METHOD_NAME__PRS, sizeof (METHOD_NAME__PRS)))) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_rs_get_method_data (device_handle, path, &buffer);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Setup pointers */
resource = (struct acpi_resource *) buffer.pointer;
buffer_end = ACPI_CAST_PTR (struct acpi_resource,
((u8 *) buffer.pointer + buffer.length));
/* Walk the resource list */
for (;;) {
if (!resource || resource->id == ACPI_RSTYPE_END_TAG) {
break;
}
status = user_function (resource, context);
switch (status) {
case AE_OK:
case AE_CTRL_DEPTH:
/* Just keep going */
status = AE_OK;
break;
case AE_CTRL_TERMINATE:
/* Exit now, with OK stats */
status = AE_OK;
goto cleanup;
default:
/* All others are valid exceptions */
goto cleanup;
}
/* Get the next resource descriptor */
resource = ACPI_NEXT_RESOURCE (resource);
/* Check for end-of-buffer */
if (resource >= buffer_end) {
goto cleanup;
}
}
cleanup:
acpi_os_free (buffer.pointer);
return_ACPI_STATUS (status);
}
ACPI_STATUS
AcpiWalkResourceBuffer (
ACPI_BUFFER *Buffer,
ACPI_WALK_RESOURCE_CALLBACK UserFunction,
void *Context)
{
ACPI_STATUS Status = AE_OK;
ACPI_RESOURCE *Resource;
ACPI_RESOURCE *ResourceEnd;
ACPI_FUNCTION_TRACE (AcpiWalkResourceBuffer);
/* Parameter validation */
if (!Buffer || !Buffer->Pointer || !UserFunction)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Buffer contains the resource list and length */
Resource = ACPI_CAST_PTR (ACPI_RESOURCE, Buffer->Pointer);
ResourceEnd = ACPI_ADD_PTR (ACPI_RESOURCE, Buffer->Pointer, Buffer->Length);
/* Walk the resource list until the EndTag is found (or buffer end) */
while (Resource < ResourceEnd)
{
/* Sanity check the resource type */
if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
{
Status = AE_AML_INVALID_RESOURCE_TYPE;
break;
}
/* Sanity check the length. It must not be zero, or we loop forever */
if (!Resource->Length)
{
return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
}
/* Invoke the user function, abort on any error returned */
Status = UserFunction (Resource, Context);
if (ACPI_FAILURE (Status))
{
if (Status == AE_CTRL_TERMINATE)
{
/* This is an OK termination by the user function */
Status = AE_OK;
}
break;
}
/* EndTag indicates end-of-list */
if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG)
{
break;
}
/* Get the next resource descriptor */
Resource = ACPI_NEXT_RESOURCE (Resource);
}
return_ACPI_STATUS (Status);
}
acpi_status
acpi_walk_resource_buffer(struct acpi_buffer * buffer,
acpi_walk_resource_callback user_function,
void *context)
{
acpi_status status = AE_OK;
struct acpi_resource *resource;
struct acpi_resource *resource_end;
ACPI_FUNCTION_TRACE(acpi_walk_resource_buffer);
/* Parameter validation */
if (!buffer || !buffer->pointer || !user_function) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Buffer contains the resource list and length */
resource = ACPI_CAST_PTR(struct acpi_resource, buffer->pointer);
resource_end =
ACPI_ADD_PTR(struct acpi_resource, buffer->pointer, buffer->length);
/* Walk the resource list until the end_tag is found (or buffer end) */
while (resource < resource_end) {
/* Sanity check the resource type */
if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
status = AE_AML_INVALID_RESOURCE_TYPE;
break;
}
/* Sanity check the length. It must not be zero, or we loop forever */
if (!resource->length) {
return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
}
/* Invoke the user function, abort on any error returned */
status = user_function(resource, context);
if (ACPI_FAILURE(status)) {
if (status == AE_CTRL_TERMINATE) {
/* This is an OK termination by the user function */
status = AE_OK;
}
break;
}
/* end_tag indicates end-of-list */
if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
break;
}
/* Get the next resource descriptor */
resource = ACPI_NEXT_RESOURCE(resource);
}
return_ACPI_STATUS(status);
}
/**
* acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events
* @chip: gpio chip
*
* ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are
* handled by ACPI event methods which need to be called from the GPIO
* chip's interrupt handler. acpi_gpiochip_request_interrupts finds out which
* gpio pins have acpi event methods and assigns interrupt handlers that calls
* the acpi event methods for those pins.
*/
void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
{
struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL};
struct acpi_resource *res;
acpi_handle handle, evt_handle;
struct list_head *evt_pins = NULL;
acpi_status status;
unsigned int pin;
int irq, ret;
char ev_name[5];
if (!chip->dev || !chip->to_irq)
return;
handle = ACPI_HANDLE(chip->dev);
if (!handle)
return;
status = acpi_get_event_resources(handle, &buf);
if (ACPI_FAILURE(status))
return;
status = acpi_get_handle(handle, "_EVT", &evt_handle);
if (ACPI_SUCCESS(status)) {
evt_pins = kzalloc(sizeof(*evt_pins), GFP_KERNEL);
if (evt_pins) {
INIT_LIST_HEAD(evt_pins);
status = acpi_attach_data(handle, acpi_gpio_evt_dh,
evt_pins);
if (ACPI_FAILURE(status)) {
kfree(evt_pins);
evt_pins = NULL;
}
}
}
/*
* If a GPIO interrupt has an ACPI event handler method, or _EVT is
* present, set up an interrupt handler that calls the ACPI event
* handler.
*/
for (res = buf.pointer;
res && (res->type != ACPI_RESOURCE_TYPE_END_TAG);
res = ACPI_NEXT_RESOURCE(res)) {
irq_handler_t handler = NULL;
void *data;
if (res->type != ACPI_RESOURCE_TYPE_GPIO ||
res->data.gpio.connection_type !=
ACPI_RESOURCE_GPIO_TYPE_INT)
continue;
pin = res->data.gpio.pin_table[0];
if (pin > chip->ngpio)
continue;
irq = chip->to_irq(chip, pin);
if (irq < 0)
continue;
if (pin <= 255) {
acpi_handle ev_handle;
sprintf(ev_name, "_%c%02X",
res->data.gpio.triggering ? 'E' : 'L', pin);
status = acpi_get_handle(handle, ev_name, &ev_handle);
if (ACPI_SUCCESS(status)) {
handler = acpi_gpio_irq_handler;
data = ev_handle;
}
}
if (!handler && evt_pins) {
struct acpi_gpio_evt_pin *evt_pin;
evt_pin = kzalloc(sizeof(*evt_pin), GFP_KERNEL);
if (!evt_pin)
continue;
list_add_tail(&evt_pin->node, evt_pins);
evt_pin->evt_handle = evt_handle;
evt_pin->pin = pin;
evt_pin->irq = irq;
handler = acpi_gpio_irq_handler_evt;
data = evt_pin;
}
if (!handler)
continue;
/* Assume BIOS sets the triggering, so no flags */
ret = devm_request_threaded_irq(chip->dev, irq, NULL, handler,
0, "GPIO-signaled-ACPI-event",
data);
if (ret)
dev_err(chip->dev,
"Failed to request IRQ %d ACPI event handler\n",
irq);
}
}
/*
* Retrieves a list of possible interrupt settings for the interrupt link
* device.
*
* Stores polarity and sensitivity in the structure pointed to by intr_flagp.
* Updates value pointed to by irqlistp with the address of a table it
* allocates. where interrupt numbers are stored. Stores the number of entries
* in this table in the value pointed to by num_entriesp;
*
* Each element in this table is of type int32_t. The table should be later
* freed by caller via acpi_free_irq_list().
*
* Returns ACPI_PSM_SUCCESS on success and ACPI_PSM_FAILURE upon failure
*/
int
acpi_get_possible_irq_resources(acpi_psm_lnk_t *acpipsmlnkp,
acpi_irqlist_t **irqlistp)
{
ACPI_HANDLE lnkobj;
ACPI_BUFFER rsb;
ACPI_RESOURCE *resp;
int status;
int i, el, po, irqlist_len;
uint32_t *irqlist;
void *tmplist;
iflag_t intr_flags;
ASSERT(acpipsmlnkp != NULL);
lnkobj = acpipsmlnkp->lnkobj;
rsb.Pointer = NULL;
rsb.Length = ACPI_ALLOCATE_BUFFER;
status = AcpiGetPossibleResources(lnkobj, &rsb);
if (status != AE_OK) {
cmn_err(CE_WARN, "!psm: get_irq: _PRS failed");
return (ACPI_PSM_FAILURE);
}
/*
* Scan the resources looking for an interrupt resource
*/
*irqlistp = 0;
for (resp = rsb.Pointer; resp->Type != ACPI_RESOURCE_TYPE_END_TAG;
resp = ACPI_NEXT_RESOURCE(resp)) {
switch (resp->Type) {
case ACPI_RESOURCE_TYPE_IRQ:
irqlist_len = resp->Data.Irq.InterruptCount;
tmplist = resp->Data.Irq.Interrupts;
el = resp->Data.Irq.Triggering;
po = resp->Data.Irq.Polarity;
break;
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
irqlist_len = resp->Data.ExtendedIrq.InterruptCount;
tmplist = resp->Data.ExtendedIrq.Interrupts;
el = resp->Data.ExtendedIrq.Triggering;
po = resp->Data.ExtendedIrq.Polarity;
break;
default:
continue;
}
if (resp->Type != ACPI_RESOURCE_TYPE_IRQ &&
resp->Type != ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
cmn_err(CE_WARN, "!psm: get_irq: no IRQ resource");
return (ACPI_PSM_FAILURE);
}
/* NEEDSWORK: move this into add_irqlist_entry someday */
irqlist = kmem_zalloc(irqlist_len * sizeof (*irqlist),
KM_SLEEP);
for (i = 0; i < irqlist_len; i++)
if (resp->Type == ACPI_RESOURCE_TYPE_IRQ)
irqlist[i] = ((uint8_t *)tmplist)[i];
else
irqlist[i] = ((uint32_t *)tmplist)[i];
intr_flags.intr_el = psm_acpi_edgelevel(el);
intr_flags.intr_po = psm_acpi_po(po);
acpi_add_irqlist_entry(irqlistp, irqlist, irqlist_len,
&intr_flags);
}
AcpiOsFree(rsb.Pointer);
return (irqlistp == NULL ? ACPI_PSM_FAILURE : ACPI_PSM_SUCCESS);
}
/*
* Retrieves the current irq setting for the interrrupt link device.
*
* Stores polarity and sensitivity in the structure pointed to by
* intr_flagp, and irqno in the value pointed to by pci_irqp.
*
* Returns ACPI_PSM_SUCCESS on success, ACPI_PSM_FAILURE upon failure.
*/
int
acpi_get_current_irq_resource(acpi_psm_lnk_t *acpipsmlnkp, int *pci_irqp,
iflag_t *intr_flagp)
{
ACPI_HANDLE lnkobj;
ACPI_BUFFER rb;
ACPI_RESOURCE *rp;
int irq;
int status = ACPI_PSM_FAILURE;
ASSERT(acpipsmlnkp != NULL);
lnkobj = acpipsmlnkp->lnkobj;
if (!(acpipsmlnkp->device_status & STA_PRESENT) ||
!(acpipsmlnkp->device_status & STA_ENABLE)) {
PSM_VERBOSE_IRQ((CE_WARN, "!psm: crs device either not "
"present or disabled, status 0x%x",
acpipsmlnkp->device_status));
return (ACPI_PSM_FAILURE);
}
rb.Pointer = NULL;
rb.Length = ACPI_ALLOCATE_BUFFER;
if (AcpiGetCurrentResources(lnkobj, &rb) != AE_OK) {
PSM_VERBOSE_IRQ((CE_WARN, "!psm: no crs object found or"
" evaluation failed"));
return (ACPI_PSM_FAILURE);
}
irq = -1;
for (rp = rb.Pointer; rp->Type != ACPI_RESOURCE_TYPE_END_TAG;
rp = ACPI_NEXT_RESOURCE(rp)) {
if (rp->Type == ACPI_RESOURCE_TYPE_IRQ) {
if (irq > 0) {
PSM_VERBOSE_IRQ((CE_WARN, "!psm: multiple IRQ"
" from _CRS "));
status = ACPI_PSM_FAILURE;
break;
}
if (rp->Data.Irq.InterruptCount != 1) {
PSM_VERBOSE_IRQ((CE_WARN, "!psm: <>1 interrupt"
" from _CRS "));
status = ACPI_PSM_FAILURE;
break;
}
intr_flagp->intr_el = psm_acpi_edgelevel(
rp->Data.Irq.Triggering);
intr_flagp->intr_po = psm_acpi_po(
rp->Data.Irq.Polarity);
irq = rp->Data.Irq.Interrupts[0];
status = ACPI_PSM_SUCCESS;
} else if (rp->Type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
if (irq > 0) {
PSM_VERBOSE_IRQ((CE_WARN, "!psm: multiple IRQ"
" from _CRS "));
status = ACPI_PSM_FAILURE;
break;
}
if (rp->Data.ExtendedIrq.InterruptCount != 1) {
PSM_VERBOSE_IRQ((CE_WARN, "!psm: <>1 interrupt"
" from _CRS "));
status = ACPI_PSM_FAILURE;
break;
}
intr_flagp->intr_el = psm_acpi_edgelevel(
rp->Data.ExtendedIrq.Triggering);
intr_flagp->intr_po = psm_acpi_po(
rp->Data.ExtendedIrq.Polarity);
irq = rp->Data.ExtendedIrq.Interrupts[0];
status = ACPI_PSM_SUCCESS;
}
}
AcpiOsFree(rb.Pointer);
if (status == ACPI_PSM_SUCCESS) {
*pci_irqp = irq;
}
return (status);
}
/*
* Sets the irq resource of the lnk object to the requested irq value.
*
* Returns ACPI_PSM_SUCCESS on success, ACPI_PSM_FAILURE upon failure.
*/
int
acpi_set_irq_resource(acpi_psm_lnk_t *acpipsmlnkp, int irq)
{
ACPI_BUFFER rsb;
ACPI_RESOURCE *resp;
ACPI_RESOURCE *srsp;
ACPI_HANDLE lnkobj;
int srs_len, status;
ASSERT(acpipsmlnkp != NULL);
lnkobj = acpipsmlnkp->lnkobj;
/*
* Fetch the possible resources for the link
*/
rsb.Pointer = NULL;
rsb.Length = ACPI_ALLOCATE_BUFFER;
status = AcpiGetPossibleResources(lnkobj, &rsb);
if (status != AE_OK) {
cmn_err(CE_WARN, "!psm: set_irq: _PRS failed");
return (ACPI_PSM_FAILURE);
}
/*
* Find an IRQ resource descriptor to use as template
*/
srsp = NULL;
for (resp = rsb.Pointer; resp->Type != ACPI_RESOURCE_TYPE_END_TAG;
resp = ACPI_NEXT_RESOURCE(resp)) {
if ((resp->Type == ACPI_RESOURCE_TYPE_IRQ) ||
(resp->Type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ)) {
ACPI_RESOURCE *endtag;
/*
* Allocate enough room for this resource entry
* and one end tag following it
*/
srs_len = resp->Length + sizeof (*endtag);
srsp = kmem_zalloc(srs_len, KM_SLEEP);
bcopy(resp, srsp, resp->Length);
endtag = ACPI_NEXT_RESOURCE(srsp);
endtag->Type = ACPI_RESOURCE_TYPE_END_TAG;
endtag->Length = 0;
break; /* drop out of the loop */
}
}
/*
* We're done with the PRS values, toss 'em lest we forget
*/
AcpiOsFree(rsb.Pointer);
if (srsp == NULL)
return (ACPI_PSM_FAILURE);
/*
* The Interrupts[] array is always at least one entry
* long; see the definition of ACPI_RESOURCE.
*/
switch (srsp->Type) {
case ACPI_RESOURCE_TYPE_IRQ:
srsp->Data.Irq.InterruptCount = 1;
srsp->Data.Irq.Interrupts[0] = irq;
break;
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
srsp->Data.ExtendedIrq.InterruptCount = 1;
srsp->Data.ExtendedIrq.Interrupts[0] = irq;
break;
}
rsb.Pointer = srsp;
rsb.Length = srs_len;
status = AcpiSetCurrentResources(lnkobj, &rsb);
kmem_free(srsp, srs_len);
if (status != AE_OK) {
cmn_err(CE_WARN, "!psm: set_irq: _SRS failed");
return (ACPI_PSM_FAILURE);
}
if (acpica_eval_int(lnkobj, "_STA", &status) == AE_OK) {
acpipsmlnkp->device_status = (uchar_t)status;
return (ACPI_PSM_SUCCESS);
} else
return (ACPI_PSM_FAILURE);
}