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 */ 16 struct i915_pxp_component_ops { 17 /** 18 * @owner: Module providing the ops. 19 */ 20 struct module *owner; 21 22 /** 23 * @send: Send a PXP message. 24 */ 25 int (*send)(struct device *dev, const void *message, size_t size, 26 unsigned long timeout_ms); 27 /** 28 * @recv: Receive a PXP message. 29 */ 30 int (*recv)(struct device *dev, void *buffer, size_t size, 31 unsigned long timeout_ms); 32 /** 33 * @gsc_command: Send a GSC command. 34 */ 35 ssize_t (*gsc_command)(struct device *dev, u8 client_id, u32 fence_id, 36 struct scatterlist *sg_in, size_t total_in_len, 37 struct scatterlist *sg_out); 38 39 }; 40 41 /** 42 * struct i915_pxp_component - Used for communication between i915 and TEE 43 * drivers for the PXP services 44 */ 45 struct i915_pxp_component { 46 /** 47 * @tee_dev: device that provide the PXP service from TEE Bus. 48 */ 49 struct device *tee_dev; 50 51 /** 52 * @ops: Ops implemented by TEE driver, used by i915 driver. 53 */ 54 const struct i915_pxp_component_ops *ops; 55 56 /** 57 * @mutex: To protect the above members. 58 */ 59 struct mutex mutex; 60 }; 61 62 #endif /* _I915_TEE_PXP_INTERFACE_H_ */ 63