1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2021 Intel Corporation. All rights rsvd. */ 3 #include <linux/init.h> 4 #include <linux/kernel.h> 5 #include <linux/module.h> 6 #include <linux/device.h> 7 #include "idxd.h" 8 9 10 int __idxd_driver_register(struct idxd_device_driver *idxd_drv, struct module *owner, 11 const char *mod_name) 12 { 13 struct device_driver *drv = &idxd_drv->drv; 14 15 if (!idxd_drv->type) { 16 pr_debug("driver type not set (%ps)\n", __builtin_return_address(0)); 17 return -EINVAL; 18 } 19 20 drv->name = idxd_drv->name; 21 drv->bus = &dsa_bus_type; 22 drv->owner = owner; 23 drv->mod_name = mod_name; 24 25 return driver_register(drv); 26 } 27 EXPORT_SYMBOL_GPL(__idxd_driver_register); 28 29 void idxd_driver_unregister(struct idxd_device_driver *idxd_drv) 30 { 31 driver_unregister(&idxd_drv->drv); 32 } 33 EXPORT_SYMBOL_GPL(idxd_driver_unregister); 34 35 static int idxd_config_bus_match(struct device *dev, 36 const struct device_driver *drv) 37 { 38 const struct idxd_device_driver *idxd_drv = 39 container_of_const(drv, struct idxd_device_driver, drv); 40 struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev); 41 int i = 0; 42 43 while (idxd_drv->type[i] != IDXD_DEV_NONE) { 44 if (idxd_dev->type == idxd_drv->type[i]) 45 return 1; 46 i++; 47 } 48 49 return 0; 50 } 51 52 static int idxd_config_bus_probe(struct device *dev) 53 { 54 struct idxd_device_driver *idxd_drv = 55 container_of(dev->driver, struct idxd_device_driver, drv); 56 struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev); 57 58 return idxd_drv->probe(idxd_dev); 59 } 60 61 static void idxd_config_bus_remove(struct device *dev) 62 { 63 struct idxd_device_driver *idxd_drv = 64 container_of(dev->driver, struct idxd_device_driver, drv); 65 struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev); 66 67 idxd_drv->remove(idxd_dev); 68 } 69 70 static int idxd_bus_uevent(const struct device *dev, struct kobj_uevent_env *env) 71 { 72 return add_uevent_var(env, "MODALIAS=" IDXD_DEVICES_MODALIAS_FMT, 0); 73 } 74 75 const struct bus_type dsa_bus_type = { 76 .name = "dsa", 77 .match = idxd_config_bus_match, 78 .probe = idxd_config_bus_probe, 79 .remove = idxd_config_bus_remove, 80 .uevent = idxd_bus_uevent, 81 }; 82 EXPORT_SYMBOL_GPL(dsa_bus_type); 83 84 static int __init dsa_bus_init(void) 85 { 86 return bus_register(&dsa_bus_type); 87 } 88 module_init(dsa_bus_init); 89 90 static void __exit dsa_bus_exit(void) 91 { 92 bus_unregister(&dsa_bus_type); 93 } 94 module_exit(dsa_bus_exit); 95 96 MODULE_DESCRIPTION("IDXD driver dsa_bus_type driver"); 97 MODULE_LICENSE("GPL v2"); 98