d9e5481fca
In preparation for dsa_drv compat support to be built-in, move the bus code to its own compilation unit. A follow-on patch adds the compat implementation. Recall that the compat implementation allows for the deprecated / omnibus dsa_drv binding scheme rather than the idiomatic organization of a full fledged bus driver per driver type. Reviewed-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162637468142.744545.2811632736881720857.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2021 Intel Corporation. All rights rsvd. */
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include "idxd.h"
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int __idxd_driver_register(struct idxd_device_driver *idxd_drv, struct module *owner,
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const char *mod_name)
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{
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struct device_driver *drv = &idxd_drv->drv;
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if (!idxd_drv->type) {
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pr_debug("driver type not set (%ps)\n", __builtin_return_address(0));
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return -EINVAL;
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}
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drv->name = idxd_drv->name;
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drv->bus = &dsa_bus_type;
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drv->owner = owner;
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drv->mod_name = mod_name;
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return driver_register(drv);
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}
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EXPORT_SYMBOL_GPL(__idxd_driver_register);
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void idxd_driver_unregister(struct idxd_device_driver *idxd_drv)
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{
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driver_unregister(&idxd_drv->drv);
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}
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EXPORT_SYMBOL_GPL(idxd_driver_unregister);
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static int idxd_config_bus_match(struct device *dev,
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struct device_driver *drv)
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{
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struct idxd_device_driver *idxd_drv =
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container_of(drv, struct idxd_device_driver, drv);
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struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev);
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int i = 0;
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while (idxd_drv->type[i] != IDXD_DEV_NONE) {
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if (idxd_dev->type == idxd_drv->type[i])
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return 1;
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i++;
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}
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return 0;
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}
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static int idxd_config_bus_probe(struct device *dev)
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{
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struct idxd_device_driver *idxd_drv =
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container_of(dev->driver, struct idxd_device_driver, drv);
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struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev);
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return idxd_drv->probe(idxd_dev);
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}
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static int idxd_config_bus_remove(struct device *dev)
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{
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struct idxd_device_driver *idxd_drv =
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container_of(dev->driver, struct idxd_device_driver, drv);
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struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev);
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idxd_drv->remove(idxd_dev);
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return 0;
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}
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struct bus_type dsa_bus_type = {
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.name = "dsa",
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.match = idxd_config_bus_match,
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.probe = idxd_config_bus_probe,
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.remove = idxd_config_bus_remove,
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};
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EXPORT_SYMBOL_GPL(dsa_bus_type);
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static int __init dsa_bus_init(void)
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{
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return bus_register(&dsa_bus_type);
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}
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module_init(dsa_bus_init);
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static void __exit dsa_bus_exit(void)
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{
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bus_unregister(&dsa_bus_type);
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}
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module_exit(dsa_bus_exit);
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MODULE_DESCRIPTION("IDXD driver dsa_bus_type driver");
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MODULE_LICENSE("GPL v2");
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