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(drv: &idxd_drv->drv); |
32 | } |
33 | EXPORT_SYMBOL_GPL(idxd_driver_unregister); |
34 | |
35 | static int idxd_config_bus_match(struct device *dev, |
36 | struct device_driver *drv) |
37 | { |
38 | struct idxd_device_driver *idxd_drv = |
39 | container_of(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, format: "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(bus: &dsa_bus_type); |
87 | } |
88 | module_init(dsa_bus_init); |
89 | |
90 | static void __exit dsa_bus_exit(void) |
91 | { |
92 | bus_unregister(bus: &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 | |