mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 15:43:59 +08:00
ccf91e68a4
Replace open coded generation PCI/MSI requester id with call to the new function pci_msi_domain_get_msi_rid() which applies the "msi-map" to the id value. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/*
|
|
* Copyright (C) 2013-2015 ARM Limited, All Rights Reserved.
|
|
* Author: Marc Zyngier <marc.zyngier@arm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/msi.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_pci.h>
|
|
|
|
static void its_mask_msi_irq(struct irq_data *d)
|
|
{
|
|
pci_msi_mask_irq(d);
|
|
irq_chip_mask_parent(d);
|
|
}
|
|
|
|
static void its_unmask_msi_irq(struct irq_data *d)
|
|
{
|
|
pci_msi_unmask_irq(d);
|
|
irq_chip_unmask_parent(d);
|
|
}
|
|
|
|
static struct irq_chip its_msi_irq_chip = {
|
|
.name = "ITS-MSI",
|
|
.irq_unmask = its_unmask_msi_irq,
|
|
.irq_mask = its_mask_msi_irq,
|
|
.irq_eoi = irq_chip_eoi_parent,
|
|
.irq_write_msi_msg = pci_msi_domain_write_msg,
|
|
};
|
|
|
|
struct its_pci_alias {
|
|
struct pci_dev *pdev;
|
|
u32 count;
|
|
};
|
|
|
|
static int its_pci_msi_vec_count(struct pci_dev *pdev)
|
|
{
|
|
int msi, msix;
|
|
|
|
msi = max(pci_msi_vec_count(pdev), 0);
|
|
msix = max(pci_msix_vec_count(pdev), 0);
|
|
|
|
return max(msi, msix);
|
|
}
|
|
|
|
static int its_get_pci_alias(struct pci_dev *pdev, u16 alias, void *data)
|
|
{
|
|
struct its_pci_alias *dev_alias = data;
|
|
|
|
if (pdev != dev_alias->pdev)
|
|
dev_alias->count += its_pci_msi_vec_count(pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int its_pci_msi_prepare(struct irq_domain *domain, struct device *dev,
|
|
int nvec, msi_alloc_info_t *info)
|
|
{
|
|
struct pci_dev *pdev;
|
|
struct its_pci_alias dev_alias;
|
|
struct msi_domain_info *msi_info;
|
|
|
|
if (!dev_is_pci(dev))
|
|
return -EINVAL;
|
|
|
|
msi_info = msi_get_domain_info(domain->parent);
|
|
|
|
pdev = to_pci_dev(dev);
|
|
dev_alias.pdev = pdev;
|
|
dev_alias.count = nvec;
|
|
|
|
pci_for_each_dma_alias(pdev, its_get_pci_alias, &dev_alias);
|
|
|
|
/* ITS specific DeviceID, as the core ITS ignores dev. */
|
|
info->scratchpad[0].ul = pci_msi_domain_get_msi_rid(domain, pdev);
|
|
|
|
return msi_info->ops->msi_prepare(domain->parent,
|
|
dev, dev_alias.count, info);
|
|
}
|
|
|
|
static struct msi_domain_ops its_pci_msi_ops = {
|
|
.msi_prepare = its_pci_msi_prepare,
|
|
};
|
|
|
|
static struct msi_domain_info its_pci_msi_domain_info = {
|
|
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
|
|
MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX),
|
|
.ops = &its_pci_msi_ops,
|
|
.chip = &its_msi_irq_chip,
|
|
};
|
|
|
|
static struct of_device_id its_device_id[] = {
|
|
{ .compatible = "arm,gic-v3-its", },
|
|
{},
|
|
};
|
|
|
|
static int __init its_pci_msi_init(void)
|
|
{
|
|
struct device_node *np;
|
|
struct irq_domain *parent;
|
|
|
|
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;
|
|
}
|
|
|
|
if (!pci_msi_create_irq_domain(of_node_to_fwnode(np),
|
|
&its_pci_msi_domain_info,
|
|
parent)) {
|
|
pr_err("%s: unable to create PCI domain\n",
|
|
np->full_name);
|
|
continue;
|
|
}
|
|
|
|
pr_info("PCI/MSI: %s domain created\n", np->full_name);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
early_initcall(its_pci_msi_init);
|