1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2013-2016, Intel Corporation. All rights reserved.
5 #ifndef _LINUX_MEI_CL_BUS_H
6 #define _LINUX_MEI_CL_BUS_H
8 #include <linux/device.h>
9 #include <linux/uuid.h>
10 #include <linux/mod_devicetable.h>
15 typedef void (*mei_cldev_cb_t)(struct mei_cl_device *cldev);
18 * struct mei_cl_device - MEI device handle
19 * An mei_cl_device pointer is returned from mei_add_device()
20 * and links MEI bus clients to their actual ME host client pointer.
21 * Drivers for MEI devices will get an mei_cl_device pointer
22 * when being probed and shall use it for doing ME bus I/O.
24 * @bus_list: device on the bus list
25 * @bus: parent mei device
26 * @dev: linux driver model device pointer
30 * @rx_work: async work to execute Rx event callback
31 * @rx_cb: Drivers register this callback to get asynchronous ME
32 * Rx buffer pending notifications.
33 * @notif_work: async work to execute FW notif event callback
34 * @notif_cb: Drivers register this callback to get asynchronous ME
35 * FW notification pending notifications.
37 * @do_match: wheather device can be matched with a driver
38 * @is_added: device is already scanned
39 * @priv_data: client private data
41 struct mei_cl_device {
42 struct list_head bus_list;
43 struct mei_device *bus;
46 struct mei_me_client *me_cl;
48 char name[MEI_CL_NAME_SIZE];
50 struct work_struct rx_work;
52 struct work_struct notif_work;
53 mei_cldev_cb_t notif_cb;
55 unsigned int do_match:1;
56 unsigned int is_added:1;
61 #define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev)
63 struct mei_cl_driver {
64 struct device_driver driver;
67 const struct mei_cl_device_id *id_table;
69 int (*probe)(struct mei_cl_device *cldev,
70 const struct mei_cl_device_id *id);
71 void (*remove)(struct mei_cl_device *cldev);
74 int __mei_cldev_driver_register(struct mei_cl_driver *cldrv,
75 struct module *owner);
76 #define mei_cldev_driver_register(cldrv) \
77 __mei_cldev_driver_register(cldrv, THIS_MODULE)
79 void mei_cldev_driver_unregister(struct mei_cl_driver *cldrv);
82 * module_mei_cl_driver - Helper macro for registering mei cl driver
84 * @__mei_cldrv: mei_cl_driver structure
86 * Helper macro for mei cl drivers which do not do anything special in module
87 * init/exit, for eliminating a boilerplate code.
89 #define module_mei_cl_driver(__mei_cldrv) \
90 module_driver(__mei_cldrv, \
91 mei_cldev_driver_register,\
92 mei_cldev_driver_unregister)
94 ssize_t mei_cldev_send(struct mei_cl_device *cldev, const u8 *buf,
96 ssize_t mei_cldev_recv(struct mei_cl_device *cldev, u8 *buf, size_t length);
97 ssize_t mei_cldev_recv_nonblock(struct mei_cl_device *cldev, u8 *buf,
99 ssize_t mei_cldev_send_vtag(struct mei_cl_device *cldev, const u8 *buf,
100 size_t length, u8 vtag);
101 ssize_t mei_cldev_recv_vtag(struct mei_cl_device *cldev, u8 *buf, size_t length,
103 ssize_t mei_cldev_recv_nonblock_vtag(struct mei_cl_device *cldev, u8 *buf,
104 size_t length, u8 *vtag);
106 int mei_cldev_register_rx_cb(struct mei_cl_device *cldev, mei_cldev_cb_t rx_cb);
107 int mei_cldev_register_notif_cb(struct mei_cl_device *cldev,
108 mei_cldev_cb_t notif_cb);
110 const uuid_le *mei_cldev_uuid(const struct mei_cl_device *cldev);
111 u8 mei_cldev_ver(const struct mei_cl_device *cldev);
113 void *mei_cldev_get_drvdata(const struct mei_cl_device *cldev);
114 void mei_cldev_set_drvdata(struct mei_cl_device *cldev, void *data);
116 int mei_cldev_enable(struct mei_cl_device *cldev);
117 int mei_cldev_disable(struct mei_cl_device *cldev);
118 bool mei_cldev_enabled(const struct mei_cl_device *cldev);
120 #endif /* _LINUX_MEI_CL_BUS_H */