linux-stable/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
Rob Herring ee07675046 irqchip: Explicitly include correct DT includes
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230714174645.4058547-1-robh@kernel.org
2023-08-21 17:49:11 +01:00

168 lines
4.1 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Freescale Management Complex (MC) bus driver MSI support
*
* Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
* Author: German Rivera <German.Rivera@freescale.com>
*
*/
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
#include <linux/irq.h>
#include <linux/msi.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/fsl/mc.h>
static struct irq_chip its_msi_irq_chip = {
.name = "ITS-fMSI",
.irq_mask = irq_chip_mask_parent,
.irq_unmask = irq_chip_unmask_parent,
.irq_eoi = irq_chip_eoi_parent,
.irq_set_affinity = msi_domain_set_affinity
};
static u32 fsl_mc_msi_domain_get_msi_id(struct irq_domain *domain,
struct fsl_mc_device *mc_dev)
{
struct device_node *of_node;
u32 out_id;
of_node = irq_domain_get_of_node(domain);
out_id = of_node ? of_msi_map_id(&mc_dev->dev, of_node, mc_dev->icid) :
iort_msi_map_id(&mc_dev->dev, mc_dev->icid);
return out_id;
}
static int its_fsl_mc_msi_prepare(struct irq_domain *msi_domain,
struct device *dev,
int nvec, msi_alloc_info_t *info)
{
struct fsl_mc_device *mc_bus_dev;
struct msi_domain_info *msi_info;
if (!dev_is_fsl_mc(dev))
return -EINVAL;
mc_bus_dev = to_fsl_mc_device(dev);
if (!(mc_bus_dev->flags & FSL_MC_IS_DPRC))
return -EINVAL;
/*
* Set the device Id to be passed to the GIC-ITS:
*
* NOTE: This device id corresponds to the IOMMU stream ID
* associated with the DPRC object (ICID).
*/
info->scratchpad[0].ul = fsl_mc_msi_domain_get_msi_id(msi_domain,
mc_bus_dev);
msi_info = msi_get_domain_info(msi_domain->parent);
/* Allocate at least 32 MSIs, and always as a power of 2 */
nvec = max_t(int, 32, roundup_pow_of_two(nvec));
return msi_info->ops->msi_prepare(msi_domain->parent, dev, nvec, info);
}
static struct msi_domain_ops its_fsl_mc_msi_ops __ro_after_init = {
.msi_prepare = its_fsl_mc_msi_prepare,
};
static struct msi_domain_info its_fsl_mc_msi_domain_info = {
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS),
.ops = &its_fsl_mc_msi_ops,
.chip = &its_msi_irq_chip,
};
static const struct of_device_id its_device_id[] = {
{ .compatible = "arm,gic-v3-its", },
{},
};
static void __init its_fsl_mc_msi_init_one(struct fwnode_handle *handle,
const char *name)
{
struct irq_domain *parent;
struct irq_domain *mc_msi_domain;
parent = irq_find_matching_fwnode(handle, DOMAIN_BUS_NEXUS);
if (!parent || !msi_get_domain_info(parent)) {
pr_err("%s: unable to locate ITS domain\n", name);
return;
}
mc_msi_domain = fsl_mc_msi_create_irq_domain(handle,
&its_fsl_mc_msi_domain_info,
parent);
if (!mc_msi_domain) {
pr_err("%s: unable to create fsl-mc domain\n", name);
return;
}
pr_info("fsl-mc MSI: %s domain created\n", name);
}
#ifdef CONFIG_ACPI
static int __init
its_fsl_mc_msi_parse_madt(union acpi_subtable_headers *header,
const unsigned long end)
{
struct acpi_madt_generic_translator *its_entry;
struct fwnode_handle *dom_handle;
const char *node_name;
int err = 0;
its_entry = (struct acpi_madt_generic_translator *)header;
node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx",
(long)its_entry->base_address);
dom_handle = iort_find_domain_token(its_entry->translation_id);
if (!dom_handle) {
pr_err("%s: Unable to locate ITS domain handle\n", node_name);
err = -ENXIO;
goto out;
}
its_fsl_mc_msi_init_one(dom_handle, node_name);
out:
kfree(node_name);
return err;
}
static void __init its_fsl_mc_acpi_msi_init(void)
{
acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR,
its_fsl_mc_msi_parse_madt, 0);
}
#else
static inline void its_fsl_mc_acpi_msi_init(void) { }
#endif
static void __init its_fsl_mc_of_msi_init(void)
{
struct device_node *np;
for (np = of_find_matching_node(NULL, its_device_id); np;
np = of_find_matching_node(np, its_device_id)) {
if (!of_device_is_available(np))
continue;
if (!of_property_read_bool(np, "msi-controller"))
continue;
its_fsl_mc_msi_init_one(of_node_to_fwnode(np),
np->full_name);
}
}
static int __init its_fsl_mc_msi_init(void)
{
its_fsl_mc_of_msi_init();
its_fsl_mc_acpi_msi_init();
return 0;
}
early_initcall(its_fsl_mc_msi_init);