blob: b4343b7d446d2990a8915866a3db2a227e69f845 [file] [log] [blame]
/*
* Copyright (C) 2016, Semihalf
* Author: Tomasz Nowicki <tn@semihalf.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* This file implements early detection/parsing of I/O mapping
* reported to OS through firmware via I/O Remapping Table (IORT)
* IORT document number: ARM DEN 0049A
*/
#define pr_fmt(fmt) "ACPI: IORT: " fmt
#include <linux/acpi_iort.h>
#include <linux/iommu-fwspec.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#define IORT_TYPE_MASK(type) (1 << (type))
#define IORT_MSI_TYPE (1 << ACPI_IORT_NODE_ITS_GROUP)
#define IORT_IOMMU_TYPE ((1 << ACPI_IORT_NODE_SMMU) | \
(1 << ACPI_IORT_NODE_SMMU_V3))
struct iort_its_msi_chip {
struct list_head list;
struct fwnode_handle *fw_node;
u32 translation_id;
};
struct iort_fwnode {
struct list_head list;
struct acpi_iort_node *iort_node;
struct fwnode_handle *fwnode;
};
static LIST_HEAD(iort_fwnode_list);
static DEFINE_SPINLOCK(iort_fwnode_lock);
/**
* iort_set_fwnode() - Create iort_fwnode and use it to register
* iommu data in the iort_fwnode_list
*
* @node: IORT table node associated with the IOMMU
* @fwnode: fwnode associated with the IORT node
*
* Returns: 0 on success
* <0 on failure
*/
int iort_set_fwnode(struct acpi_iort_node *iort_node,
struct fwnode_handle *fwnode)
{
struct iort_fwnode *np;
np = kzalloc(sizeof(struct iort_fwnode), GFP_ATOMIC);
if (WARN_ON(!np))
return -ENOMEM;
INIT_LIST_HEAD(&np->list);
np->iort_node = iort_node;
np->fwnode = fwnode;
spin_lock(&iort_fwnode_lock);
list_add_tail(&np->list, &iort_fwnode_list);
spin_unlock(&iort_fwnode_lock);
return 0;
}
/**
* iort_get_fwnode() - Retrieve fwnode associated with an IORT node
*
* @node: IORT table node to be looked-up
*
* Returns: fwnode_handle pointer on success, NULL on failure
*/
struct fwnode_handle *iort_get_fwnode(struct acpi_iort_node *node)
{
struct iort_fwnode *curr;
struct fwnode_handle *fwnode = NULL;
spin_lock(&iort_fwnode_lock);
list_for_each_entry(curr, &iort_fwnode_list, list) {
if (curr->iort_node == node) {
fwnode = curr->fwnode;
break;
}
}
spin_unlock(&iort_fwnode_lock);
return fwnode;
}
typedef acpi_status (*iort_find_node_callback)
(struct acpi_iort_node *node, void *context);
/* Root pointer to the mapped IORT table */
static struct acpi_table_header *iort_table;
static LIST_HEAD(iort_msi_chip_list);
static DEFINE_SPINLOCK(iort_msi_chip_lock);
/**
* iort_register_domain_token() - register domain token and related ITS ID
* to the list from where we can get it back later on.
* @trans_id: ITS ID.
* @fw_node: Domain token.
*
* Returns: 0 on success, -ENOMEM if no memory when allocating list element
*/
int iort_register_domain_token(int trans_id, struct fwnode_handle *fw_node)
{
struct iort_its_msi_chip *its_msi_chip;
its_msi_chip = kzalloc(sizeof(*its_msi_chip), GFP_KERNEL);
if (!its_msi_chip)
return -ENOMEM;
its_msi_chip->fw_node = fw_node;
its_msi_chip->translation_id = trans_id;
spin_lock(&iort_msi_chip_lock);
list_add(&its_msi_chip->list, &iort_msi_chip_list);
spin_unlock(&iort_msi_chip_lock);
return 0;
}
/**
* iort_deregister_domain_token() - Deregister domain token based on ITS ID
* @trans_id: ITS ID.
*
* Returns: none.
*/
void iort_deregister_domain_token(int trans_id)
{
struct iort_its_msi_chip *its_msi_chip, *t;
spin_lock(&iort_msi_chip_lock);
list_for_each_entry_safe(its_msi_chip, t, &iort_msi_chip_list, list) {
if (its_msi_chip->translation_id == trans_id) {
list_del(&its_msi_chip->list);
kfree(its_msi_chip);
break;
}
}
spin_unlock(&iort_msi_chip_lock);
}
/**
* iort_find_domain_token() - Find domain token based on given ITS ID
* @trans_id: ITS ID.
*
* Returns: domain token when find on the list, NULL otherwise
*/
struct fwnode_handle *iort_find_domain_token(int trans_id)
{
struct fwnode_handle *fw_node = NULL;
struct iort_its_msi_chip *its_msi_chip;
spin_lock(&iort_msi_chip_lock);
list_for_each_entry(its_msi_chip, &iort_msi_chip_list, list) {
if (its_msi_chip->translation_id == trans_id) {
fw_node = its_msi_chip->fw_node;
break;
}
}
spin_unlock(&iort_msi_chip_lock);
return fw_node;
}
static struct acpi_iort_node *iort_scan_node(enum acpi_iort_node_type type,
iort_find_node_callback callback,
void *context)
{
struct acpi_iort_node *iort_node, *iort_end;
struct acpi_table_iort *iort;
int i;
if (!iort_table)
return NULL;
/* Get the first IORT node */
iort = (struct acpi_table_iort *)iort_table;
iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort,
iort->node_offset);
iort_end = ACPI_ADD_PTR(struct acpi_iort_node, iort_table,
iort_table->length);
for (i = 0; i < iort->node_count; i++) {
if (WARN_TAINT(iort_node >= iort_end, TAINT_FIRMWARE_WORKAROUND,
"IORT node pointer overflows, bad table!\n"))
return NULL;
if (iort_node->type == type &&
ACPI_SUCCESS(callback(iort_node, context)))
return iort_node;
iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort_node,
iort_node->length);
}
return NULL;
}
static acpi_status iort_match_node_callback(struct acpi_iort_node *node,
void *context)
{
struct device *dev = context;
acpi_status status = AE_NOT_FOUND;
switch (node->type) {
case 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)
break;
status = acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &buf);
if (ACPI_FAILURE(status)) {
dev_warn(dev, "Can't get device full path name\n");
break;
}
ncomp = (struct acpi_iort_named_component *)node->node_data;
if (!strcmp(ncomp->device_name, buf.pointer))
status = AE_OK;
acpi_os_free(buf.pointer);
break;
}
case ACPI_IORT_NODE_PCI_ROOT_COMPLEX: {
struct acpi_iort_root_complex *pci_rc;
struct pci_bus *bus;
bus = to_pci_bus(dev);
pci_rc = (struct acpi_iort_root_complex *)node->node_data;
/*
* It is assumed that PCI segment numbers maps one-to-one
* with root complexes. Each segment number can represent only
* one root complex.
*/
if (pci_rc->pci_segment_number == pci_domain_nr(bus))
status = AE_OK;
break;
}
}
return status;
}
static int iort_id_map(struct acpi_iort_id_mapping *map, u8 type, u32 rid_in,
u32 *rid_out)
{
/* Single mapping does not care for input id */
if (map->flags & ACPI_IORT_ID_SINGLE_MAPPING) {
if (type == ACPI_IORT_NODE_NAMED_COMPONENT ||
type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
*rid_out = map->output_base;
return 0;
}
pr_warn(FW_BUG "[map %p] SINGLE MAPPING flag not allowed for node type %d, skipping ID map\n",
map, type);
return -ENXIO;
}
if (rid_in < map->input_base ||
(rid_in >= map->input_base + map->id_count))
return -ENXIO;
*rid_out = map->output_base + (rid_in - map->input_base);
return 0;
}
static
struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
u32 *id_out, u8 type_mask,
int index)
{
struct acpi_iort_node *parent;
struct acpi_iort_id_mapping *map;
if (!node->mapping_offset || !node->mapping_count ||
index >= node->mapping_count)
return NULL;
map = ACPI_ADD_PTR(struct acpi_iort_id_mapping, node,
node->mapping_offset);
/* Firmware bug! */
if (!map->output_reference) {
pr_err(FW_BUG "[node %p type %d] ID map has NULL parent reference\n",
node, node->type);
return NULL;
}
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[index].flags & ACPI_IORT_ID_SINGLE_MAPPING) {
if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT ||
node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
*id_out = map[index].output_base;
return parent;
}
}
return NULL;
}
static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
u32 rid_in, u32 *rid_out,
u8 type_mask)
{
u32 rid = rid_in;
/* Parse the ID mapping tree to find specified node type */
while (node) {
struct acpi_iort_id_mapping *map;
int i;
if (IORT_TYPE_MASK(node->type) & type_mask) {
if (rid_out)
*rid_out = rid;
return node;
}
if (!node->mapping_offset || !node->mapping_count)
goto fail_map;
map = ACPI_ADD_PTR(struct acpi_iort_id_mapping, node,
node->mapping_offset);
/* Firmware bug! */
if (!map->output_reference) {
pr_err(FW_BUG "[node %p type %d] ID map has NULL parent reference\n",
node, node->type);
goto fail_map;
}
/* Do the RID translation */
for (i = 0; i < node->mapping_count; i++, map++) {
if (!iort_id_map(map, node->type, rid, &rid))
break;
}
if (i == node->mapping_count)
goto fail_map;
node = ACPI_ADD_PTR(struct acpi_iort_node, iort_table,
map->output_reference);
}
fail_map:
/* Map input RID to output RID unchanged on mapping failure*/
if (rid_out)
*rid_out = rid_in;
return NULL;
}
static struct acpi_iort_node *iort_find_dev_node(struct device *dev)
{
struct pci_bus *pbus;
if (!dev_is_pci(dev))
return iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
iort_match_node_callback, dev);
/* Find a PCI root bus */
pbus = to_pci_dev(dev)->bus;
while (!pci_is_root_bus(pbus))
pbus = pbus->parent;
return iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX,
iort_match_node_callback, &pbus->dev);
}
/**
* iort_msi_map_rid() - Map a MSI requester ID for a device
* @dev: The device for which the mapping is to be done.
* @req_id: The device requester ID.
*
* Returns: mapped MSI RID on success, input requester ID otherwise
*/
u32 iort_msi_map_rid(struct device *dev, u32 req_id)
{
struct acpi_iort_node *node;
u32 dev_id;
node = iort_find_dev_node(dev);
if (!node)
return req_id;
iort_node_map_rid(node, req_id, &dev_id, IORT_MSI_TYPE);
return dev_id;
}
/**
* iort_dev_find_its_id() - Find the ITS identifier for a device
* @dev: The device.
* @idx: Index of the ITS identifier list.
* @its_id: ITS identifier.
*
* Returns: 0 on success, appropriate error value otherwise
*/
static int iort_dev_find_its_id(struct device *dev, u32 req_id,
unsigned int idx, int *its_id)
{
struct acpi_iort_its_group *its;
struct acpi_iort_node *node;
node = iort_find_dev_node(dev);
if (!node)
return -ENXIO;
node = iort_node_map_rid(node, req_id, NULL, IORT_MSI_TYPE);
if (!node)
return -ENXIO;
/* Move to ITS specific data */
its = (struct acpi_iort_its_group *)node->node_data;
if (idx > its->its_count) {
dev_err(dev, "requested ITS ID index [%d] is greater than available [%d]\n",
idx, its->its_count);
return -ENXIO;
}
*its_id = its->identifiers[idx];
return 0;
}
/**
* iort_get_device_domain() - Find MSI domain related to a device
* @dev: The device.
* @req_id: Requester ID for the device.
*
* Returns: the MSI domain for this device, NULL otherwise
*/
struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id)
{
static struct fwnode_handle *handle;
int its_id;
if (iort_dev_find_its_id(dev, req_id, 0, &its_id))
return NULL;
handle = iort_find_domain_token(its_id);
if (!handle)
return NULL;
return irq_find_matching_fwnode(handle, DOMAIN_BUS_PCI_MSI);
}
static int __get_pci_rid(struct pci_dev *pdev, u16 alias, void *data)
{
u32 *rid = data;
*rid = alias;
return 0;
}
static int arm_smmu_iort_xlate(struct device *dev, u32 streamid,
struct fwnode_handle *fwnode)
{
int ret = iommu_fwspec_init(dev, fwnode);
if (!ret)
ret = iommu_fwspec_add_ids(dev, &streamid, 1);
return ret;
}
static const struct iommu_ops *iort_iommu_xlate(struct device *dev,
struct acpi_iort_node *node,
u32 streamid)
{
struct fwnode_handle *iort_fwnode = NULL;
int ret;
if (node) {
iort_fwnode = iort_get_fwnode(node);
if (!iort_fwnode)
return NULL;
ret = arm_smmu_iort_xlate(dev, streamid,
iort_fwnode);
if (!ret)
return fwspec_iommu_get_ops(iort_fwnode);
}
return NULL;
}
/**
* iort_iommu_configure - Set-up IOMMU configuration for a device.
*
* @dev: device to configure
*
* Returns: iommu_ops pointer on configuration success
* NULL on configuration failure
*/
const struct iommu_ops *iort_iommu_configure(struct device *dev)
{
struct acpi_iort_node *node, *parent;
const struct iommu_ops *ops = NULL;
u32 streamid = 0;
if (dev_is_pci(dev)) {
struct pci_bus *bus = to_pci_dev(dev)->bus;
u32 rid;
pci_for_each_dma_alias(to_pci_dev(dev), __get_pci_rid,
&rid);
node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX,
iort_match_node_callback, &bus->dev);
if (!node)
return NULL;
parent = iort_node_map_rid(node, rid, &streamid,
IORT_IOMMU_TYPE);
ops = iort_iommu_xlate(dev, parent, streamid);
} else {
int i = 0;
node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
iort_match_node_callback, dev);
if (!node)
return NULL;
parent = iort_node_get_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++);
}
}
return ops;
}
static void __init acpi_iort_register_irq(int hwirq, const char *name,
int trigger,
struct resource *res)
{
int irq = acpi_register_gsi(NULL, hwirq, trigger,
ACPI_ACTIVE_HIGH);
if (irq < 0) {
pr_err("could not register gsi hwirq %d name [%s]\n", hwirq,
name);
return;
}
res->start = irq;
res->end = irq;
res->flags = IORESOURCE_IRQ;
res->name = name;
}
static int __init arm_smmu_v3_count_resources(struct acpi_iort_node *node)
{
struct acpi_iort_smmu_v3 *smmu;
/* Always present mem resource */
int num_res = 1;
/* Retrieve SMMUv3 specific data */
smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
if (smmu->event_gsiv)
num_res++;
if (smmu->pri_gsiv)
num_res++;
if (smmu->gerr_gsiv)
num_res++;
if (smmu->sync_gsiv)
num_res++;
return num_res;
}
static void __init arm_smmu_v3_init_resources(struct resource *res,
struct acpi_iort_node *node)
{
struct acpi_iort_smmu_v3 *smmu;
int num_res = 0;
/* Retrieve SMMUv3 specific data */
smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
res[num_res].start = smmu->base_address;
res[num_res].end = smmu->base_address + SZ_128K - 1;
res[num_res].flags = IORESOURCE_MEM;
num_res++;
if (smmu->event_gsiv)
acpi_iort_register_irq(smmu->event_gsiv, "eventq",
ACPI_EDGE_SENSITIVE,
&res[num_res++]);
if (smmu->pri_gsiv)
acpi_iort_register_irq(smmu->pri_gsiv, "priq",
ACPI_EDGE_SENSITIVE,
&res[num_res++]);
if (smmu->gerr_gsiv)
acpi_iort_register_irq(smmu->gerr_gsiv, "gerror",
ACPI_EDGE_SENSITIVE,
&res[num_res++]);
if (smmu->sync_gsiv)
acpi_iort_register_irq(smmu->sync_gsiv, "cmdq-sync",
ACPI_EDGE_SENSITIVE,
&res[num_res++]);
}
static bool __init arm_smmu_v3_is_coherent(struct acpi_iort_node *node)
{
struct acpi_iort_smmu_v3 *smmu;
/* Retrieve SMMUv3 specific data */
smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
return smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE;
}
static int __init arm_smmu_count_resources(struct acpi_iort_node *node)
{
struct acpi_iort_smmu *smmu;
int num_irqs;
u64 *glb_irq;
/* Retrieve SMMU specific data */
smmu = (struct acpi_iort_smmu *)node->node_data;
glb_irq = ACPI_ADD_PTR(u64, node, smmu->global_interrupt_offset);
if (!IORT_IRQ_MASK(glb_irq[1])) /* 0 means not implemented */
num_irqs = 1;
else
num_irqs = 2;
num_irqs += smmu->context_interrupt_count;
return num_irqs + 1;
}
static void __init arm_smmu_init_resources(struct resource *res,
struct acpi_iort_node *node)
{
struct acpi_iort_smmu *smmu;
int i, hw_irq, trigger, num_res = 0;
u64 *ctx_irq, *glb_irq;
/* Retrieve SMMU specific data */
smmu = (struct acpi_iort_smmu *)node->node_data;
res[num_res].start = smmu->base_address;
res[num_res].end = smmu->base_address + smmu->span - 1;
res[num_res].flags = IORESOURCE_MEM;
num_res++;
glb_irq = ACPI_ADD_PTR(u64, node, smmu->global_interrupt_offset);
/* Global IRQs */
hw_irq = IORT_IRQ_MASK(glb_irq[0]);
trigger = IORT_IRQ_TRIGGER_MASK(glb_irq[0]);
acpi_iort_register_irq(hw_irq, "arm-smmu-global", trigger,
&res[num_res++]);
/* Global IRQs */
hw_irq = IORT_IRQ_MASK(glb_irq[1]);
if (hw_irq) {
trigger = IORT_IRQ_TRIGGER_MASK(glb_irq[1]);
acpi_iort_register_irq(hw_irq, "arm-smmu-global", trigger,
&res[num_res++]);
}
/* Context IRQs */
ctx_irq = ACPI_ADD_PTR(u64, node, smmu->context_interrupt_offset);
for (i = 0; i < smmu->context_interrupt_count; i++) {
hw_irq = IORT_IRQ_MASK(ctx_irq[i]);
trigger = IORT_IRQ_TRIGGER_MASK(ctx_irq[i]);
acpi_iort_register_irq(hw_irq, "arm-smmu-context", trigger,
&res[num_res++]);
}
}
static bool __init arm_smmu_is_coherent(struct acpi_iort_node *node)
{
struct acpi_iort_smmu *smmu;
/* Retrieve SMMU specific data */
smmu = (struct acpi_iort_smmu *)node->node_data;
return smmu->flags & ACPI_IORT_SMMU_COHERENT_WALK;
}
struct iort_iommu_config {
const char *name;
int (*iommu_init)(struct acpi_iort_node *node);
bool (*iommu_is_coherent)(struct acpi_iort_node *node);
int (*iommu_count_resources)(struct acpi_iort_node *node);
void (*iommu_init_resources)(struct resource *res,
struct acpi_iort_node *node);
};
static const struct iort_iommu_config iort_arm_smmu_v3_cfg __initconst = {
.name = "arm-smmu-v3",
.iommu_is_coherent = arm_smmu_v3_is_coherent,
.iommu_count_resources = arm_smmu_v3_count_resources,
.iommu_init_resources = arm_smmu_v3_init_resources
};
static const struct iort_iommu_config iort_arm_smmu_cfg __initconst = {
.name = "arm-smmu",
.iommu_is_coherent = arm_smmu_is_coherent,
.iommu_count_resources = arm_smmu_count_resources,
.iommu_init_resources = arm_smmu_init_resources
};
static __init
const struct iort_iommu_config *iort_get_iommu_cfg(struct acpi_iort_node *node)
{
switch (node->type) {
case ACPI_IORT_NODE_SMMU_V3:
return &iort_arm_smmu_v3_cfg;
case ACPI_IORT_NODE_SMMU:
return &iort_arm_smmu_cfg;
default:
return NULL;
}
}
/**
* iort_add_smmu_platform_device() - Allocate a platform device for SMMU
* @fwnode: IORT node associated fwnode handle
* @node: Pointer to SMMU ACPI IORT node
*
* Returns: 0 on success, <0 failure
*/
static int __init iort_add_smmu_platform_device(struct fwnode_handle *fwnode,
struct acpi_iort_node *node)
{
struct platform_device *pdev;
struct resource *r;
enum dev_dma_attr attr;
int ret, count;
const struct iort_iommu_config *ops = iort_get_iommu_cfg(node);
if (!ops)
return -ENODEV;
pdev = platform_device_alloc(ops->name, PLATFORM_DEVID_AUTO);
if (!pdev)
return PTR_ERR(pdev);
count = ops->iommu_count_resources(node);
r = kcalloc(count, sizeof(*r), GFP_KERNEL);
if (!r) {
ret = -ENOMEM;
goto dev_put;
}
ops->iommu_init_resources(r, node);
ret = platform_device_add_resources(pdev, r, count);
/*
* Resources are duplicated in platform_device_add_resources,
* free their allocated memory
*/
kfree(r);
if (ret)
goto dev_put;
/*
* Add a copy of IORT node pointer to platform_data to
* be used to retrieve IORT data information.
*/
ret = platform_device_add_data(pdev, &node, sizeof(node));
if (ret)
goto dev_put;
pdev->dev.dma_mask = kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
if (!pdev->dev.dma_mask) {
ret = -ENOMEM;
goto dev_put;
}
pdev->dev.fwnode = fwnode;
/*
* Set default dma mask value for the table walker,
* to be overridden on probing with correct value.
*/
*pdev->dev.dma_mask = DMA_BIT_MASK(32);
pdev->dev.coherent_dma_mask = *pdev->dev.dma_mask;
attr = ops->iommu_is_coherent(node) ?
DEV_DMA_COHERENT : DEV_DMA_NON_COHERENT;
/* Configure DMA for the page table walker */
acpi_dma_configure(&pdev->dev, attr);
ret = platform_device_add(pdev);
if (ret)
goto dma_deconfigure;
return 0;
dma_deconfigure:
acpi_dma_deconfigure(&pdev->dev);
kfree(pdev->dev.dma_mask);
dev_put:
platform_device_put(pdev);
return ret;
}
static acpi_status __init iort_match_iommu_callback(struct acpi_iort_node *node,
void *context)
{
int ret;
struct fwnode_handle *fwnode;
fwnode = iort_get_fwnode(node);
if (!fwnode)
return AE_NOT_FOUND;
ret = iort_add_smmu_platform_device(fwnode, node);
if (ret) {
pr_err("Error in platform device creation\n");
return AE_ERROR;
}
return AE_OK;
}
static void __init iort_smmu_init(void)
{
iort_scan_node(ACPI_IORT_NODE_SMMU, iort_match_iommu_callback, NULL);
iort_scan_node(ACPI_IORT_NODE_SMMU_V3, iort_match_iommu_callback, NULL);
}
void __init acpi_iort_init(void)
{
acpi_status status;
status = acpi_get_table(ACPI_SIG_IORT, 0, &iort_table);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
const char *msg = acpi_format_exception(status);
pr_err("Failed to get table, %s\n", msg);
return;
}
acpi_probe_device_table(iort);
iort_smmu_init();
}