linux_dsm_epyc7002/drivers/misc/mic/bus/cosm_bus.c
Thomas Gleixner 4e43d779e5 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 290
Based on 1 normalized pattern(s):

  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 the full gnu general public license is included in
  this distribution in the file called copying

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 39 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.397680977@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:38 +02:00

131 lines
2.9 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2015 Intel Corporation.
*
* Intel MIC COSM Bus Driver
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/idr.h>
#include "cosm_bus.h"
/* Unique numbering for cosm devices. */
static DEFINE_IDA(cosm_index_ida);
static int cosm_dev_probe(struct device *d)
{
struct cosm_device *dev = dev_to_cosm(d);
struct cosm_driver *drv = drv_to_cosm(dev->dev.driver);
return drv->probe(dev);
}
static int cosm_dev_remove(struct device *d)
{
struct cosm_device *dev = dev_to_cosm(d);
struct cosm_driver *drv = drv_to_cosm(dev->dev.driver);
drv->remove(dev);
return 0;
}
static struct bus_type cosm_bus = {
.name = "cosm_bus",
.probe = cosm_dev_probe,
.remove = cosm_dev_remove,
};
int cosm_register_driver(struct cosm_driver *driver)
{
driver->driver.bus = &cosm_bus;
return driver_register(&driver->driver);
}
EXPORT_SYMBOL_GPL(cosm_register_driver);
void cosm_unregister_driver(struct cosm_driver *driver)
{
driver_unregister(&driver->driver);
}
EXPORT_SYMBOL_GPL(cosm_unregister_driver);
static inline void cosm_release_dev(struct device *d)
{
struct cosm_device *cdev = dev_to_cosm(d);
kfree(cdev);
}
struct cosm_device *
cosm_register_device(struct device *pdev, struct cosm_hw_ops *hw_ops)
{
struct cosm_device *cdev;
int ret;
cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
if (!cdev)
return ERR_PTR(-ENOMEM);
cdev->dev.parent = pdev;
cdev->dev.release = cosm_release_dev;
cdev->hw_ops = hw_ops;
dev_set_drvdata(&cdev->dev, cdev);
cdev->dev.bus = &cosm_bus;
/* Assign a unique device index and hence name */
ret = ida_simple_get(&cosm_index_ida, 0, 0, GFP_KERNEL);
if (ret < 0)
goto free_cdev;
cdev->index = ret;
cdev->dev.id = ret;
dev_set_name(&cdev->dev, "cosm-dev%u", cdev->index);
ret = device_register(&cdev->dev);
if (ret)
goto ida_remove;
return cdev;
ida_remove:
ida_simple_remove(&cosm_index_ida, cdev->index);
free_cdev:
put_device(&cdev->dev);
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(cosm_register_device);
void cosm_unregister_device(struct cosm_device *dev)
{
int index = dev->index; /* save for after device release */
device_unregister(&dev->dev);
ida_simple_remove(&cosm_index_ida, index);
}
EXPORT_SYMBOL_GPL(cosm_unregister_device);
struct cosm_device *cosm_find_cdev_by_id(int id)
{
struct device *dev = subsys_find_device_by_id(&cosm_bus, id, NULL);
return dev ? container_of(dev, struct cosm_device, dev) : NULL;
}
EXPORT_SYMBOL_GPL(cosm_find_cdev_by_id);
static int __init cosm_init(void)
{
return bus_register(&cosm_bus);
}
static void __exit cosm_exit(void)
{
bus_unregister(&cosm_bus);
ida_destroy(&cosm_index_ida);
}
core_initcall(cosm_init);
module_exit(cosm_exit);
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("Intel(R) MIC card OS state management bus driver");
MODULE_LICENSE("GPL v2");