root/include/linux/mei_cl_bus.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (c) 2013-2016, Intel Corporation. All rights reserved.
   4  */
   5 #ifndef _LINUX_MEI_CL_BUS_H
   6 #define _LINUX_MEI_CL_BUS_H
   7 
   8 #include <linux/device.h>
   9 #include <linux/uuid.h>
  10 #include <linux/mod_devicetable.h>
  11 
  12 struct mei_cl_device;
  13 struct mei_device;
  14 
  15 typedef void (*mei_cldev_cb_t)(struct mei_cl_device *cldev);
  16 
  17 /**
  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.
  23  *
  24  * @bus_list: device on the bus list
  25  * @bus: parent mei device
  26  * @dev: linux driver model device pointer
  27  * @me_cl: me client
  28  * @cl: mei client
  29  * @name: device name
  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.
  36  *
  37  * @do_match: wheather device can be matched with a driver
  38  * @is_added: device is already scanned
  39  * @priv_data: client private data
  40  */
  41 struct mei_cl_device {
  42         struct list_head bus_list;
  43         struct mei_device *bus;
  44         struct device dev;
  45 
  46         struct mei_me_client *me_cl;
  47         struct mei_cl *cl;
  48         char name[MEI_CL_NAME_SIZE];
  49 
  50         struct work_struct rx_work;
  51         mei_cldev_cb_t rx_cb;
  52         struct work_struct notif_work;
  53         mei_cldev_cb_t notif_cb;
  54 
  55         unsigned int do_match:1;
  56         unsigned int is_added:1;
  57 
  58         void *priv_data;
  59 };
  60 
  61 #define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev)
  62 
  63 struct mei_cl_driver {
  64         struct device_driver driver;
  65         const char *name;
  66 
  67         const struct mei_cl_device_id *id_table;
  68 
  69         int (*probe)(struct mei_cl_device *cldev,
  70                      const struct mei_cl_device_id *id);
  71         int (*remove)(struct mei_cl_device *cldev);
  72 };
  73 
  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)
  78 
  79 void mei_cldev_driver_unregister(struct mei_cl_driver *cldrv);
  80 
  81 /**
  82  * module_mei_cl_driver - Helper macro for registering mei cl driver
  83  *
  84  * @__mei_cldrv: mei_cl_driver structure
  85  *
  86  *  Helper macro for mei cl drivers which do not do anything special in module
  87  *  init/exit, for eliminating a boilerplate code.
  88  */
  89 #define module_mei_cl_driver(__mei_cldrv) \
  90         module_driver(__mei_cldrv, \
  91                       mei_cldev_driver_register,\
  92                       mei_cldev_driver_unregister)
  93 
  94 ssize_t mei_cldev_send(struct mei_cl_device *cldev, u8 *buf, size_t length);
  95 ssize_t mei_cldev_recv(struct mei_cl_device *cldev, u8 *buf, size_t length);
  96 ssize_t mei_cldev_recv_nonblock(struct mei_cl_device *cldev, u8 *buf,
  97                                 size_t length);
  98 
  99 int mei_cldev_register_rx_cb(struct mei_cl_device *cldev, mei_cldev_cb_t rx_cb);
 100 int mei_cldev_register_notif_cb(struct mei_cl_device *cldev,
 101                                 mei_cldev_cb_t notif_cb);
 102 
 103 const uuid_le *mei_cldev_uuid(const struct mei_cl_device *cldev);
 104 u8 mei_cldev_ver(const struct mei_cl_device *cldev);
 105 
 106 void *mei_cldev_get_drvdata(const struct mei_cl_device *cldev);
 107 void mei_cldev_set_drvdata(struct mei_cl_device *cldev, void *data);
 108 
 109 int mei_cldev_enable(struct mei_cl_device *cldev);
 110 int mei_cldev_disable(struct mei_cl_device *cldev);
 111 bool mei_cldev_enabled(struct mei_cl_device *cldev);
 112 
 113 #endif /* _LINUX_MEI_CL_BUS_H */