linux-imx

/*

 * 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/acpi_iort.h>

#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,

};

​

static int its_pci_msi_vec_count(struct pci_dev *pdev, void *data)

{

    int msi, msix, *count = data;

​

    msi = max(pci_msi_vec_count(pdev), 0);

    msix = max(pci_msix_vec_count(pdev), 0);

    *count += max(msi, msix);

​

    return 0;

}

​

static int its_get_pci_alias(struct pci_dev *pdev, u16 alias, void *data)

{

    struct pci_dev **alias_dev = data;

​

    *alias_dev = pdev;

​

    return 0;

}

​