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 * @kcr_base: base mmio offset for the KCR engine which is different on legacy platforms 31 * vs newer platforms where the KCR is inside the media-tile. 32 */ 33 u32 kcr_base; 34 35 /** 36 * @gsccs_res: resources for request submission for platforms that have a GSC engine. 37 */ 38 struct gsccs_session_resources { 39 u64 host_session_handle; /* used by firmware to link commands to sessions */ 40 struct intel_context *ce; /* context for gsc command submission */ 41 42 struct i915_vma *pkt_vma; /* GSC FW cmd packet vma */ 43 void *pkt_vaddr; /* GSC FW cmd packet virt pointer */ 44 45 struct i915_vma *bb_vma; /* HECI_PKT batch buffer vma */ 46 void *bb_vaddr; /* HECI_PKT batch buffer virt pointer */ 47 } gsccs_res; 48 49 /** 50 * @pxp_component: i915_pxp_component struct of the bound mei_pxp 51 * module. Only set and cleared inside component bind/unbind functions, 52 * which are protected by &tee_mutex. 53 */ 54 struct i915_pxp_component *pxp_component; 55 56 /** 57 * @dev_link: Enforce module relationship for power management ordering. 58 */ 59 struct device_link *dev_link; 60 /** 61 * @pxp_component_added: track if the pxp component has been added. 62 * Set and cleared in tee init and fini functions respectively. 63 */ 64 bool pxp_component_added; 65 66 /** @ce: kernel-owned context used for PXP operations */ 67 struct intel_context *ce; 68 69 /** @arb_mutex: protects arb session start */ 70 struct mutex arb_mutex; 71 /** 72 * @arb_is_valid: tracks arb session status. 73 * After a teardown, the arb session can still be in play on the HW 74 * even if the keys are gone, so we can't rely on the HW state of the 75 * session to know if it's valid and need to track the status in SW. 76 */ 77 bool arb_is_valid; 78 79 /** 80 * @key_instance: tracks which key instance we're on, so we can use it 81 * to determine if an object was created using the current key or a 82 * previous one. 83 */ 84 u32 key_instance; 85 86 /** @tee_mutex: protects the tee channel binding and messaging. */ 87 struct mutex tee_mutex; 88 89 /** @stream_cmd: LMEM obj used to send stream PXP commands to the GSC */ 90 struct { 91 struct drm_i915_gem_object *obj; /* contains PXP command memory */ 92 void *vaddr; /* virtual memory for PXP command */ 93 } stream_cmd; 94 95 /** 96 * @hw_state_invalidated: if the HW perceives an attack on the integrity 97 * of the encryption it will invalidate the keys and expect SW to 98 * re-initialize the session. We keep track of this state to make sure 99 * we only re-start the arb session when required. 100 */ 101 bool hw_state_invalidated; 102 103 /** @irq_enabled: tracks the status of the kcr irqs */ 104 bool irq_enabled; 105 /** 106 * @termination: tracks the status of a pending termination. Only 107 * re-initialized under gt->irq_lock and completed in &session_work. 108 */ 109 struct completion termination; 110 111 /** @session_work: worker that manages session events. */ 112 struct work_struct session_work; 113 /** @session_events: pending session events, protected with gt->irq_lock. */ 114 u32 session_events; 115 #define PXP_TERMINATION_REQUEST BIT(0) 116 #define PXP_TERMINATION_COMPLETE BIT(1) 117 #define PXP_INVAL_REQUIRED BIT(2) 118 }; 119 120 #endif /* __INTEL_PXP_TYPES_H__ */ 121