include/linux/mei_cl_bus.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_MEI_CL_BUS_H
   3 #define _LINUX_MEI_CL_BUS_H
   4
   5 #include <linux/device.h>
   6 #include <linux/uuid.h>
   7 #include <linux/mod_devicetable.h>
   8
   9 struct mei_cl_device;
  10 struct mei_device;
  11
  12 typedef void (*mei_cldev_cb_t)(struct mei_cl_device *cldev);
  13
  14 /**
  15  * struct mei_cl_device - MEI device handle
  16  * An mei_cl_device pointer is returned from mei_add_device()
  17  * and links MEI bus clients to their actual ME host client pointer.
  18  * Drivers for MEI devices will get an mei_cl_device pointer
  19  * when being probed and shall use it for doing ME bus I/O.
  20  *
  21  * @bus_list: device on the bus list
  22  * @bus: parent mei device
  23  * @dev: linux driver model device pointer
  24  * @me_cl: me client
  25  * @cl: mei client
  26  * @name: device name
  27  * @rx_work: async work to execute Rx event callback
  28  * @rx_cb: Drivers register this callback to get asynchronous ME
  29  *      Rx buffer pending notifications.
  30  * @notif_work: async work to execute FW notif event callback
  31  * @notif_cb: Drivers register this callback to get asynchronous ME
  32  *      FW notification pending notifications.
  33  *
  34  * @do_match: wheather device can be matched with a driver
  35  * @is_added: device is already scanned
  36  * @priv_data: client private data
  37  */
  38 struct mei_cl_device {
  39         struct list_head bus_list;
  40         struct mei_device *bus;
  41         struct device dev;
  42
  43         struct mei_me_client *me_cl;
  44         struct mei_cl *cl;
  45         char name[MEI_CL_NAME_SIZE];
  46
  47         struct work_struct rx_work;
  48         mei_cldev_cb_t rx_cb;
  49         struct work_struct notif_work;
  50         mei_cldev_cb_t notif_cb;
  51
  52         unsigned int do_match:1;
  53         unsigned int is_added:1;
  54
  55         void *priv_data;
  56 };
  57
  58 struct mei_cl_driver {
  59         struct device_driver driver;
  60         const char *name;
  61
  62         const struct mei_cl_device_id *id_table;
  63
  64         int (*probe)(struct mei_cl_device *cldev,
  65                      const struct mei_cl_device_id *id);
  66         int (*remove)(struct mei_cl_device *cldev);
  67 };
  68
  69 int __mei_cldev_driver_register(struct mei_cl_driver *cldrv,
  70                                 struct module *owner);
  71 #define mei_cldev_driver_register(cldrv)             \
  72         __mei_cldev_driver_register(cldrv, THIS_MODULE)
  73
  74 void mei_cldev_driver_unregister(struct mei_cl_driver *cldrv);
  75
  76 /**
  77  * module_mei_cl_driver - Helper macro for registering mei cl driver
  78  *
  79  * @__mei_cldrv: mei_cl_driver structure
  80  *
  81  *  Helper macro for mei cl drivers which do not do anything special in module
  82  *  init/exit, for eliminating a boilerplate code.
  83  */
  84 #define module_mei_cl_driver(__mei_cldrv) \
  85         module_driver(__mei_cldrv, \
  86                       mei_cldev_driver_register,\
  87                       mei_cldev_driver_unregister)
  88
  89 ssize_t mei_cldev_send(struct mei_cl_device *cldev, u8 *buf, size_t length);
  90 ssize_t mei_cldev_recv(struct mei_cl_device *cldev, u8 *buf, size_t length);
  91 ssize_t mei_cldev_recv_nonblock(struct mei_cl_device *cldev, u8 *buf,
  92                                 size_t length);
  93
  94 int mei_cldev_register_rx_cb(struct mei_cl_device *cldev, mei_cldev_cb_t rx_cb);
  95 int mei_cldev_register_notif_cb(struct mei_cl_device *cldev,
  96                                 mei_cldev_cb_t notif_cb);
  97
  98 const uuid_le *mei_cldev_uuid(const struct mei_cl_device *cldev);
  99 u8 mei_cldev_ver(const struct mei_cl_device *cldev);
 100
 101 void *mei_cldev_get_drvdata(const struct mei_cl_device *cldev);
 102 void mei_cldev_set_drvdata(struct mei_cl_device *cldev, void *data);
 103
 104 int mei_cldev_enable(struct mei_cl_device *cldev);
 105 int mei_cldev_disable(struct mei_cl_device *cldev);
 106 bool mei_cldev_enabled(struct mei_cl_device *cldev);
 107
 108 #endif /* _LINUX_MEI_CL_BUS_H */