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>
16 typedef void (*mei_cldev_cb_t)(struct mei_cl_device *cldev);
19 * struct mei_cl_device - MEI device handle
20 * An mei_cl_device pointer is returned from mei_add_device()
21 * and links MEI bus clients to their actual ME host client pointer.
22 * Drivers for MEI devices will get an mei_cl_device pointer
23 * when being probed and shall use it for doing ME bus I/O.
25 * @bus_list: device on the bus list
26 * @bus: parent mei device
27 * @dev: linux driver model device pointer
31 * @rx_work: async work to execute Rx event callback
32 * @rx_cb: Drivers register this callback to get asynchronous ME
33 * Rx buffer pending notifications.
34 * @notif_work: async work to execute FW notif event callback
35 * @notif_cb: Drivers register this callback to get asynchronous ME
36 * FW notification pending notifications.
38 * @do_match: wheather device can be matched with a driver
39 * @is_added: device is already scanned
40 * @priv_data: client private data
42 struct mei_cl_device {
43 struct list_head bus_list;
44 struct mei_device *bus;
47 struct mei_me_client *me_cl;
49 char name[MEI_CL_NAME_SIZE];
51 struct work_struct rx_work;
53 struct work_struct notif_work;
54 mei_cldev_cb_t notif_cb;
56 unsigned int do_match:1;
57 unsigned int is_added:1;
62 #define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev)
64 struct mei_cl_driver {
65 struct device_driver driver;
68 const struct mei_cl_device_id *id_table;
70 int (*probe)(struct mei_cl_device *cldev,
71 const struct mei_cl_device_id *id);
72 void (*remove)(struct mei_cl_device *cldev);
75 int __mei_cldev_driver_register(struct mei_cl_driver *cldrv,
76 struct module *owner);
77 #define mei_cldev_driver_register(cldrv) \
78 __mei_cldev_driver_register(cldrv, THIS_MODULE)
80 void mei_cldev_driver_unregister(struct mei_cl_driver *cldrv);
83 * module_mei_cl_driver - Helper macro for registering mei cl driver
85 * @__mei_cldrv: mei_cl_driver structure
87 * Helper macro for mei cl drivers which do not do anything special in module
88 * init/exit, for eliminating a boilerplate code.
90 #define module_mei_cl_driver(__mei_cldrv) \
91 module_driver(__mei_cldrv, \
92 mei_cldev_driver_register,\
93 mei_cldev_driver_unregister)
95 ssize_t mei_cldev_send(struct mei_cl_device *cldev, const u8 *buf,
97 ssize_t mei_cldev_recv(struct mei_cl_device *cldev, u8 *buf, size_t length);
98 ssize_t mei_cldev_recv_nonblock(struct mei_cl_device *cldev, u8 *buf,
100 ssize_t mei_cldev_send_vtag(struct mei_cl_device *cldev, const u8 *buf,
101 size_t length, u8 vtag);
102 ssize_t mei_cldev_recv_vtag(struct mei_cl_device *cldev, u8 *buf, size_t length,
104 ssize_t mei_cldev_recv_nonblock_vtag(struct mei_cl_device *cldev, u8 *buf,
105 size_t length, u8 *vtag);
107 int mei_cldev_register_rx_cb(struct mei_cl_device *cldev, mei_cldev_cb_t rx_cb);
108 int mei_cldev_register_notif_cb(struct mei_cl_device *cldev,
109 mei_cldev_cb_t notif_cb);
111 const uuid_le *mei_cldev_uuid(const struct mei_cl_device *cldev);
112 u8 mei_cldev_ver(const struct mei_cl_device *cldev);
114 void *mei_cldev_get_drvdata(const struct mei_cl_device *cldev);
115 void mei_cldev_set_drvdata(struct mei_cl_device *cldev, void *data);
117 int mei_cldev_enable(struct mei_cl_device *cldev);
118 int mei_cldev_disable(struct mei_cl_device *cldev);
119 bool mei_cldev_enabled(const struct mei_cl_device *cldev);
120 ssize_t mei_cldev_send_gsc_command(struct mei_cl_device *cldev,
121 u8 client_id, u32 fence_id,
122 struct scatterlist *sg_in,
124 struct scatterlist *sg_out);
126 void *mei_cldev_dma_map(struct mei_cl_device *cldev, u8 buffer_id, size_t size);
127 int mei_cldev_dma_unmap(struct mei_cl_device *cldev);
129 #endif /* _LINUX_MEI_CL_BUS_H */