linux-imx

// 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/of_device.h>

#include <linux/of_address.h>

#include <linux/of_irq.h>

#include <linux/irq.h>

#include <linux/irqdomain.h>

#include <linux/msi.h>

​

#include "fsl-mc-private.h"

​

#ifdef GENERIC_MSI_DOMAIN_OPS

/*

 * Generate a unique ID identifying the interrupt (only used within the MSI

 * irqdomain.  Combine the icid with the interrupt index.

 */

static irq_hw_number_t fsl_mc_domain_calc_hwirq(struct fsl_mc_device *dev,

                        struct msi_desc *desc)

{

    /*

     * Make the base hwirq value for ICID*10000 so it is readable

     * as a decimal value in /proc/interrupts.

     */

    return (irq_hw_number_t)(desc->fsl_mc.msi_index + (dev->icid * 10000));

}

​

static void fsl_mc_msi_set_desc(msi_alloc_info_t *arg,

                struct msi_desc *desc)

{

    arg->desc = desc;

    arg->hwirq = fsl_mc_domain_calc_hwirq(to_fsl_mc_device(desc->dev),

                          desc);

}

#else

#define fsl_mc_msi_set_desc NULL

#endif

​

static void fsl_mc_msi_update_dom_ops(struct msi_domain_info *info)

{

    struct msi_domain_ops *ops = info->ops;

​

    if (!ops)

        return;

​

    /*

     * set_desc should not be set by the caller

     */

    if (!ops->set_desc)

        ops->set_desc = fsl_mc_msi_set_desc;

}

​

static void __fsl_mc_msi_write_msg(struct fsl_mc_device *mc_bus_dev,

                   struct fsl_mc_device_irq *mc_dev_irq)

{

    int error;

    struct fsl_mc_device *owner_mc_dev = mc_dev_irq->mc_dev;