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    Subject[patch V3 04/22] genirq/msi: Create msi_api.h
    Date
    Create a API header for MSI specific functions which are relevant to device
    drivers.

    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
    ---
    include/linux/msi.h | 6 ++++--
    include/linux/msi_api.h | 15 +++++++++++++++
    2 files changed, 19 insertions(+), 2 deletions(-)

    --- a/include/linux/msi.h
    +++ b/include/linux/msi.h
    @@ -13,11 +13,14 @@
    *
    * Regular device drivers have no business with any of these functions and
    * especially storing MSI descriptor pointers in random code is considered
    - * abuse. The only function which is relevant for drivers is msi_get_virq().
    + * abuse.
    + *
    + * Device driver relevant functions are available in <linux/msi_api.h>
    */

    #include <linux/irqdomain_defs.h>
    #include <linux/cpumask.h>
    +#include <linux/msi_api.h>
    #include <linux/xarray.h>
    #include <linux/mutex.h>
    #include <linux/list.h>
    @@ -188,7 +191,6 @@ struct msi_device_data {

    int msi_setup_device_data(struct device *dev);

    -unsigned int msi_get_virq(struct device *dev, unsigned int index);
    void msi_lock_descs(struct device *dev);
    void msi_unlock_descs(struct device *dev);

    --- /dev/null
    +++ b/include/linux/msi_api.h
    @@ -0,0 +1,15 @@
    +/* SPDX-License-Identifier: GPL-2.0 */
    +#ifndef LINUX_MSI_API_H
    +#define LINUX_MSI_API_H
    +
    +/*
    + * APIs which are relevant for device driver code for allocating and
    + * freeing MSI interrupts and querying the associations between
    + * hardware/software MSI indices and the Linux interrupt number.
    + */
    +
    +struct device;
    +
    +unsigned int msi_get_virq(struct device *dev, unsigned int index);
    +
    +#endif
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