Commit 9349e81e authored by Catalin Marinas's avatar Catalin Marinas

Merge tag 'acpi-arm64-for-v4.12' of...

Merge tag 'acpi-arm64-for-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux into for-next/core

ACPI ARM64 specific changes for v4.12.

Patches contain:

- IORT kernel interface misc clean-ups
- IORT id mapping interface refactoring in preparation for platform
  MSI (IORT named components -> GIC ITS mappings) devid mapping code
- IORT id mapping implementation for named components nodes to ITS nodes,
  in order to provide the kernel with a firmware interface to map
  platform devices devids to GIC ITS components

* tag 'acpi-arm64-for-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux:
  ACPI: platform: setup MSI domain for ACPI based platform device
  ACPI: platform-msi: retrieve devid from IORT
  ACPI/IORT: Introduce iort_node_map_platform_id() to retrieve dev id
  ACPI/IORT: Rename iort_node_map_rid() to make it generic
  ACPI/IORT: Rework iort_match_node_callback() return value handling
  ACPI/IORT: Add missing comment for iort_dev_find_its_id()
  ACPI/IORT: Fix the indentation in iort_scan_node()
parents cad27ef2 d4f54a18
......@@ -253,17 +253,15 @@ static acpi_status iort_match_node_callback(struct acpi_iort_node *node,
void *context)
{
struct device *dev = context;
acpi_status status;
acpi_status status = AE_NOT_FOUND;
if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT) {
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_device *adev = to_acpi_device_node(dev->fwnode);
struct acpi_iort_named_component *ncomp;
if (!adev) {
status = AE_NOT_FOUND;
if (!adev)
goto out;
}
status = acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &buf);
if (ACPI_FAILURE(status)) {
......@@ -289,8 +287,6 @@ static acpi_status iort_match_node_callback(struct acpi_iort_node *node,
*/
status = pci_rc->pci_segment_number == pci_domain_nr(bus) ?
AE_OK : AE_NOT_FOUND;
} else {
status = AE_NOT_FOUND;
}
out:
return status;
......@@ -322,8 +318,7 @@ static int iort_id_map(struct acpi_iort_id_mapping *map, u8 type, u32 rid_in,
static
struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
u32 *id_out, u8 type_mask,
int index)
u32 *id_out, int index)
{
struct acpi_iort_node *parent;
struct acpi_iort_id_mapping *map;
......@@ -345,9 +340,6 @@ struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
parent = ACPI_ADD_PTR(struct acpi_iort_node, iort_table,
map->output_reference);
if (!(IORT_TYPE_MASK(parent->type) & type_mask))
return NULL;
if (map->flags & ACPI_IORT_ID_SINGLE_MAPPING) {
if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT ||
node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
......@@ -359,11 +351,11 @@ struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
return NULL;
}
static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
u32 rid_in, u32 *rid_out,
static struct acpi_iort_node *iort_node_map_id(struct acpi_iort_node *node,
u32 id_in, u32 *id_out,
u8 type_mask)
{
u32 rid = rid_in;
u32 id = id_in;
/* Parse the ID mapping tree to find specified node type */
while (node) {
......@@ -371,8 +363,8 @@ static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
int i;
if (IORT_TYPE_MASK(node->type) & type_mask) {
if (rid_out)
*rid_out = rid;
if (id_out)
*id_out = id;
return node;
}
......@@ -389,9 +381,9 @@ static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
goto fail_map;
}
/* Do the RID translation */
/* Do the ID translation */
for (i = 0; i < node->mapping_count; i++, map++) {
if (!iort_id_map(map, node->type, rid, &rid))
if (!iort_id_map(map, node->type, id, &id))
break;
}
......@@ -403,11 +395,39 @@ static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
}
fail_map:
/* Map input RID to output RID unchanged on mapping failure*/
if (rid_out)
*rid_out = rid_in;
/* Map input ID to output ID unchanged on mapping failure */
if (id_out)
*id_out = id_in;
return NULL;
}
static
struct acpi_iort_node *iort_node_map_platform_id(struct acpi_iort_node *node,
u32 *id_out, u8 type_mask,
int index)
{
struct acpi_iort_node *parent;
u32 id;
/* step 1: retrieve the initial dev id */
parent = iort_node_get_id(node, &id, index);
if (!parent)
return NULL;
/*
* optional step 2: map the initial dev id if its parent is not
* the target type we want, map it again for the use cases such
* as NC (named component) -> SMMU -> ITS. If the type is matched,
* return the initial dev id and its parent pointer directly.
*/
if (!(IORT_TYPE_MASK(parent->type) & type_mask))
parent = iort_node_map_id(parent, id, id_out, type_mask);
else
if (id_out)
*id_out = id;
return parent;
}
static struct acpi_iort_node *iort_find_dev_node(struct device *dev)
......@@ -443,13 +463,38 @@ u32 iort_msi_map_rid(struct device *dev, u32 req_id)
if (!node)
return req_id;
iort_node_map_rid(node, req_id, &dev_id, IORT_MSI_TYPE);
iort_node_map_id(node, req_id, &dev_id, IORT_MSI_TYPE);
return dev_id;
}
/**
* iort_pmsi_get_dev_id() - Get the device id for a device
* @dev: The device for which the mapping is to be done.
* @dev_id: The device ID found.
*
* Returns: 0 for successful find a dev id, -ENODEV on error
*/
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id)
{
int i;
struct acpi_iort_node *node;
node = iort_find_dev_node(dev);
if (!node)
return -ENODEV;
for (i = 0; i < node->mapping_count; i++) {
if (iort_node_map_platform_id(node, dev_id, IORT_MSI_TYPE, i))
return 0;
}
return -ENODEV;
}
/**
* iort_dev_find_its_id() - Find the ITS identifier for a device
* @dev: The device.
* @req_id: Device's requester ID
* @idx: Index of the ITS identifier list.
* @its_id: ITS identifier.
*
......@@ -465,7 +510,7 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id,
if (!node)
return -ENXIO;
node = iort_node_map_rid(node, req_id, NULL, IORT_MSI_TYPE);
node = iort_node_map_id(node, req_id, NULL, IORT_MSI_TYPE);
if (!node)
return -ENXIO;
......@@ -503,6 +548,56 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id)
return irq_find_matching_fwnode(handle, DOMAIN_BUS_PCI_MSI);
}
/**
* iort_get_platform_device_domain() - Find MSI domain related to a
* platform device
* @dev: the dev pointer associated with the platform device
*
* Returns: the MSI domain for this device, NULL otherwise
*/
static struct irq_domain *iort_get_platform_device_domain(struct device *dev)
{
struct acpi_iort_node *node, *msi_parent;
struct fwnode_handle *iort_fwnode;
struct acpi_iort_its_group *its;
int i;
/* find its associated iort node */
node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
iort_match_node_callback, dev);
if (!node)
return NULL;
/* then find its msi parent node */
for (i = 0; i < node->mapping_count; i++) {
msi_parent = iort_node_map_platform_id(node, NULL,
IORT_MSI_TYPE, i);
if (msi_parent)
break;
}
if (!msi_parent)
return NULL;
/* Move to ITS specific data */
its = (struct acpi_iort_its_group *)msi_parent->node_data;
iort_fwnode = iort_find_domain_token(its->identifiers[0]);
if (!iort_fwnode)
return NULL;
return irq_find_matching_fwnode(iort_fwnode, DOMAIN_BUS_PLATFORM_MSI);
}
void acpi_configure_pmsi_domain(struct device *dev)
{
struct irq_domain *msi_domain;
msi_domain = iort_get_platform_device_domain(dev);
if (msi_domain)
dev_set_msi_domain(dev, msi_domain);
}
static int __get_pci_rid(struct pci_dev *pdev, u16 alias, void *data)
{
u32 *rid = data;
......@@ -594,7 +689,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
if (!node)
return NULL;
parent = iort_node_map_rid(node, rid, &streamid,
parent = iort_node_map_id(node, rid, &streamid,
IORT_IOMMU_TYPE);
ops = iort_iommu_xlate(dev, parent, streamid);
......@@ -607,14 +702,15 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
if (!node)
return NULL;
parent = iort_node_get_id(node, &streamid,
parent = iort_node_map_platform_id(node, &streamid,
IORT_IOMMU_TYPE, i++);
while (parent) {
ops = iort_iommu_xlate(dev, parent, streamid);
parent = iort_node_get_id(node, &streamid,
IORT_IOMMU_TYPE, i++);
parent = iort_node_map_platform_id(node, &streamid,
IORT_IOMMU_TYPE,
i++);
}
}
......
......@@ -6,6 +6,8 @@
*
* This file is released under the GPLv2.
*/
#include <linux/acpi_iort.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/list.h>
......@@ -14,6 +16,7 @@
#include <linux/rwsem.h>
#include <linux/acpi.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include "internal.h"
......@@ -322,6 +325,9 @@ static int acpi_platform_notify(struct device *dev)
if (!adev)
goto out;
if (dev->bus == &platform_bus_type)
acpi_configure_pmsi_domain(dev);
if (type && type->setup)
type->setup(dev);
else if (adev->handler && adev->handler->bind)
......
......@@ -34,6 +34,8 @@ void acpi_iort_init(void);
bool iort_node_match(u8 type);
u32 iort_msi_map_rid(struct device *dev, u32 req_id);
struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id);
void acpi_configure_pmsi_domain(struct device *dev);
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
/* IOMMU interface */
void iort_set_dma_mask(struct device *dev);
const struct iommu_ops *iort_iommu_configure(struct device *dev);
......@@ -45,6 +47,7 @@ static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id)
static inline struct irq_domain *iort_get_device_domain(struct device *dev,
u32 req_id)
{ return NULL; }
static inline void acpi_configure_pmsi_domain(struct device *dev) { }
/* IOMMU interface */
static inline void iort_set_dma_mask(struct device *dev) { }
static inline
......
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