1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2020 Intel Corporation 4 */ 5 6 #ifndef _I915_PXP_TEE_INTERFACE_H_ 7 #define _I915_PXP_TEE_INTERFACE_H_ 8 9 #include <linux/mutex.h> 10 #include <linux/device.h> 11 struct scatterlist; 12 13 /** 14 * struct i915_pxp_component_ops - ops for PXP services. 15 * @owner: Module providing the ops 16 * @send: sends data to PXP 17 * @receive: receives data from PXP 18 */ 19 struct i915_pxp_component_ops { 20 /** 21 * @owner: owner of the module provding the ops 22 */ 23 struct module *owner; 24 25 int (*send)(struct device *dev, const void *message, size_t size, 26 unsigned long timeout_ms); 27 int (*recv)(struct device *dev, void *buffer, size_t size, 28 unsigned long timeout_ms); 29 ssize_t (*gsc_command)(struct device *dev, u8 client_id, u32 fence_id, 30 struct scatterlist *sg_in, size_t total_in_len, 31 struct scatterlist *sg_out); 32 33 }; 34 35 /** 36 * struct i915_pxp_component - Used for communication between i915 and TEE 37 * drivers for the PXP services 38 * @tee_dev: device that provide the PXP service from TEE Bus. 39 * @pxp_ops: Ops implemented by TEE driver, used by i915 driver. 40 */ 41 struct i915_pxp_component { 42 struct device *tee_dev; 43 const struct i915_pxp_component_ops *ops; 44 45 /* To protect the above members. */ 46 struct mutex mutex; 47 }; 48 49 #endif /* _I915_TEE_PXP_INTERFACE_H_ */ 50