include/drm/intel/i915_gsc_proxy_mei_interface.h

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright (c) 2022-2023 Intel Corporation
   4  */
   5
   6 #ifndef _I915_GSC_PROXY_MEI_INTERFACE_H_
   7 #define _I915_GSC_PROXY_MEI_INTERFACE_H_
   8
   9 #include <linux/types.h>
  10
  11 struct device;
  12 struct module;
  13
  14 /**
  15  * struct i915_gsc_proxy_component_ops - ops for GSC Proxy services.
  16  * @owner: Module providing the ops
  17  * @send: sends a proxy message from GSC FW to ME FW
  18  * @recv: receives a proxy message for GSC FW from ME FW
  19  */
  20 struct i915_gsc_proxy_component_ops {
  21         struct module *owner;
  22
  23         /**
  24          * @send: Sends a proxy message to ME FW.
  25          * @dev: device struct corresponding to the mei device
  26          * @buf: message buffer to send
  27          * @size: size of the message
  28          * Return: bytes sent on success, negative errno value on failure
  29          */
  30         int (*send)(struct device *dev, const void *buf, size_t size);
  31
  32         /**
  33          * @recv: Receives a proxy message from ME FW.
  34          * @dev: device struct corresponding to the mei device
  35          * @buf: message buffer to contain the received message
  36          * @size: size of the buffer
  37          * Return: bytes received on success, negative errno value on failure
  38          */
  39         int (*recv)(struct device *dev, void *buf, size_t size);
  40 };
  41
  42 /**
  43  * struct i915_gsc_proxy_component - Used for communication between i915 and
  44  * MEI drivers for GSC proxy services
  45  * @mei_dev: device that provide the GSC proxy service.
  46  * @ops: Ops implemented by GSC proxy driver, used by i915 driver.
  47  */
  48 struct i915_gsc_proxy_component {
  49         struct device *mei_dev;
  50         const struct i915_gsc_proxy_component_ops *ops;
  51 };
  52
  53 #endif /* _I915_GSC_PROXY_MEI_INTERFACE_H_ */