1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright(c) 2020, Intel Corporation. All rights reserved. 4 */ 5 6 #ifndef __INTEL_PXP_TYPES_H__ 7 #define __INTEL_PXP_TYPES_H__ 8 9 #include <linux/completion.h> 10 #include <linux/mutex.h> 11 #include <linux/types.h> 12 #include <linux/workqueue.h> 13 14 struct intel_context; 15 struct intel_gt; 16 struct i915_pxp_component; 17 struct drm_i915_private; 18 19 /** 20 * struct intel_pxp - pxp state 21 */ 22 struct intel_pxp { 23 /** 24 * @ctrl_gt: poiner to the tile that owns the controls for PXP subsystem assets that 25 * the VDBOX, the KCR engine (and GSC CS depending on the platform) 26 */ 27 struct intel_gt *ctrl_gt; 28 29 /** 30 * @pxp_component: i915_pxp_component struct of the bound mei_pxp 31 * module. Only set and cleared inside component bind/unbind functions, 32 * which are protected by &tee_mutex. 33 */ 34 struct i915_pxp_component *pxp_component; 35 /** 36 * @pxp_component_added: track if the pxp component has been added. 37 * Set and cleared in tee init and fini functions respectively. 38 */ 39 bool pxp_component_added; 40 41 /** @ce: kernel-owned context used for PXP operations */ 42 struct intel_context *ce; 43 44 /** @arb_mutex: protects arb session start */ 45 struct mutex arb_mutex; 46 /** 47 * @arb_is_valid: tracks arb session status. 48 * After a teardown, the arb session can still be in play on the HW 49 * even if the keys are gone, so we can't rely on the HW state of the 50 * session to know if it's valid and need to track the status in SW. 51 */ 52 bool arb_is_valid; 53 54 /** 55 * @key_instance: tracks which key instance we're on, so we can use it 56 * to determine if an object was created using the current key or a 57 * previous one. 58 */ 59 u32 key_instance; 60 61 /** @tee_mutex: protects the tee channel binding and messaging. */ 62 struct mutex tee_mutex; 63 64 /** @stream_cmd: LMEM obj used to send stream PXP commands to the GSC */ 65 struct { 66 struct drm_i915_gem_object *obj; /* contains PXP command memory */ 67 void *vaddr; /* virtual memory for PXP command */ 68 } stream_cmd; 69 70 /** 71 * @hw_state_invalidated: if the HW perceives an attack on the integrity 72 * of the encryption it will invalidate the keys and expect SW to 73 * re-initialize the session. We keep track of this state to make sure 74 * we only re-start the arb session when required. 75 */ 76 bool hw_state_invalidated; 77 78 /** @irq_enabled: tracks the status of the kcr irqs */ 79 bool irq_enabled; 80 /** 81 * @termination: tracks the status of a pending termination. Only 82 * re-initialized under gt->irq_lock and completed in &session_work. 83 */ 84 struct completion termination; 85 86 /** @session_work: worker that manages session events. */ 87 struct work_struct session_work; 88 /** @session_events: pending session events, protected with gt->irq_lock. */ 89 u32 session_events; 90 #define PXP_TERMINATION_REQUEST BIT(0) 91 #define PXP_TERMINATION_COMPLETE BIT(1) 92 #define PXP_INVAL_REQUIRED BIT(2) 93 }; 94 95 #endif /* __INTEL_PXP_TYPES_H__ */ 96