Release 4.7 drivers/staging/fsl-mc/bus/irq-gic-v3-its-fsl-mc-msi.c
/*
* Freescale Management Complex (MC) bus driver MSI support
*
* Copyright (C) 2015 Freescale Semiconductor, Inc.
* Author: German Rivera <German.Rivera@freescale.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include "../include/mc-private.h"
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/irqchip/arm-gic-v3.h>
#include <linux/irq.h>
#include <linux/msi.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include "../include/mc-sys.h"
#include "dprc-cmd.h"
static struct irq_chip its_msi_irq_chip = {
.name = "fsl-mc-bus-msi",
.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 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 (WARN_ON(dev->bus != &fsl_mc_bus_type))
return -EINVAL;
mc_bus_dev = to_fsl_mc_device(dev);
if (WARN_ON(!(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 = mc_bus_dev->icid;
msi_info = msi_get_domain_info(msi_domain->parent);
return msi_info->ops->msi_prepare(msi_domain->parent, dev, nvec, info);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| j. german rivera | j. german rivera | 115 | 100.00% | 1 | 100.00% |
| Total | 115 | 100.00% | 1 | 100.00% |
static struct msi_domain_ops its_fsl_mc_msi_ops = {
.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", },
{},
};
int __init its_fsl_mc_msi_init(void)
{
struct device_node *np;
struct irq_domain *parent;
struct irq_domain *mc_msi_domain;
for (np = of_find_matching_node(NULL, its_device_id); np;
np = of_find_matching_node(np, its_device_id)) {
if (!of_property_read_bool(np, "msi-controller"))
continue;
parent = irq_find_matching_host(np, DOMAIN_BUS_NEXUS);
if (!parent || !msi_get_domain_info(parent)) {
pr_err("%s: unable to locate ITS domain\n",
np->full_name);
continue;
}
mc_msi_domain = fsl_mc_msi_create_irq_domain(
of_node_to_fwnode(np),
&its_fsl_mc_msi_domain_info,
parent);
if (!mc_msi_domain) {
pr_err("%s: unable to create fsl-mc domain\n",
np->full_name);
continue;
}
WARN_ON(mc_msi_domain->
host_data != &its_fsl_mc_msi_domain_info);
pr_info("fsl-mc MSI: %s domain created\n", np->full_name);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| j. german rivera | j. german rivera | 144 | 100.00% | 1 | 100.00% |
| Total | 144 | 100.00% | 1 | 100.00% |
void its_fsl_mc_msi_cleanup(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)) {
struct irq_domain *mc_msi_domain = irq_find_matching_host(
np,
DOMAIN_BUS_FSL_MC_MSI);
if (!of_property_read_bool(np, "msi-controller"))
continue;
if (mc_msi_domain &&
mc_msi_domain->host_data == &its_fsl_mc_msi_domain_info)
irq_domain_remove(mc_msi_domain);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| j. german rivera | j. german rivera | 75 | 100.00% | 1 | 100.00% |
| Total | 75 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| j. german rivera | j. german rivera | 455 | 100.00% | 1 | 100.00% |
| Total | 455 | 100.00% | 1 | 100.00% |
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