18 static bool intel_pxp_session_is_in_play(struct intel_pxp *pxp, u32 id)  in intel_pxp_session_is_in_play()  argument
20 	struct intel_uncore *uncore = pxp->ctrl_gt->uncore;  in intel_pxp_session_is_in_play()
26 		sip = intel_uncore_read(uncore, KCR_SIP(pxp->kcr_base));  in intel_pxp_session_is_in_play()
31 static int pxp_wait_for_session_state(struct intel_pxp *pxp, u32 id, bool in_play)  in pxp_wait_for_session_state()  argument
33 	struct intel_uncore *uncore = pxp->ctrl_gt->uncore;  in pxp_wait_for_session_state()
44 				      KCR_SIP(pxp->kcr_base),  in pxp_wait_for_session_state()
54 static int pxp_create_arb_session(struct intel_pxp *pxp)  in pxp_create_arb_session()  argument
56 	struct intel_gt *gt = pxp->ctrl_gt;  in pxp_create_arb_session()
59 	pxp->arb_is_valid = false;  in pxp_create_arb_session()
61 	if (intel_pxp_session_is_in_play(pxp, ARB_SESSION)) {  in pxp_create_arb_session()
66 	if (HAS_ENGINE(pxp->ctrl_gt, GSC0))  in pxp_create_arb_session()
67 		ret = intel_pxp_gsccs_create_session(pxp, ARB_SESSION);  in pxp_create_arb_session()
69 		ret = intel_pxp_tee_cmd_create_arb_session(pxp, ARB_SESSION);  in pxp_create_arb_session()
75 	ret = pxp_wait_for_session_state(pxp, ARB_SESSION, true);  in pxp_create_arb_session()
80 	drm_dbg(&gt->i915->drm, "PXP ARB session is alive\n");  in pxp_create_arb_session()
82 	if (!++pxp->key_instance)  in pxp_create_arb_session()
83 		++pxp->key_instance;  in pxp_create_arb_session()
85 	pxp->arb_is_valid = true;  in pxp_create_arb_session()
90 static int pxp_terminate_arb_session_and_global(struct intel_pxp *pxp)  in pxp_terminate_arb_session_and_global()  argument
93 	struct intel_gt *gt = pxp->ctrl_gt;  in pxp_terminate_arb_session_and_global()
96 	GEM_WARN_ON(pxp->arb_is_valid);  in pxp_terminate_arb_session_and_global()
99 	ret = intel_pxp_terminate_session(pxp, ARB_SESSION);  in pxp_terminate_arb_session_and_global()
105 	ret = pxp_wait_for_session_state(pxp, ARB_SESSION, false);  in pxp_terminate_arb_session_and_global()
111 	intel_uncore_write(gt->uncore, KCR_GLOBAL_TERMINATE(pxp->kcr_base), 1);  in pxp_terminate_arb_session_and_global()
114 		intel_pxp_gsccs_end_arb_fw_session(pxp, ARB_SESSION);  in pxp_terminate_arb_session_and_global()
116 		intel_pxp_tee_end_arb_fw_session(pxp, ARB_SESSION);  in pxp_terminate_arb_session_and_global()
121 void intel_pxp_terminate(struct intel_pxp *pxp, bool post_invalidation_needs_restart)  in intel_pxp_terminate()  argument
125 	pxp->hw_state_invalidated = post_invalidation_needs_restart;  in intel_pxp_terminate()
129 	 * it to complete. PXP will be marked as non-active until the next  in intel_pxp_terminate()
132 	ret = pxp_terminate_arb_session_and_global(pxp);  in intel_pxp_terminate()
134 		complete_all(&pxp->termination);  in intel_pxp_terminate()
137 static void pxp_terminate_complete(struct intel_pxp *pxp)  in pxp_terminate_complete()  argument
140 	if (fetch_and_zero(&pxp->hw_state_invalidated))  in pxp_terminate_complete()
141 		pxp_create_arb_session(pxp);  in pxp_terminate_complete()
143 	complete_all(&pxp->termination);  in pxp_terminate_complete()
148 	struct intel_pxp *pxp = container_of(work, typeof(*pxp), session_work);  in pxp_session_work()  local
149 	struct intel_gt *gt = pxp->ctrl_gt;  in pxp_session_work()
154 	events = fetch_and_zero(&pxp->session_events);  in pxp_session_work()
161 		intel_pxp_invalidate(pxp);  in pxp_session_work()
173 		intel_pxp_terminate(pxp, true);  in pxp_session_work()
177 		pxp_terminate_complete(pxp);  in pxp_session_work()
182 void intel_pxp_session_management_init(struct intel_pxp *pxp)  in intel_pxp_session_management_init()  argument
184 	mutex_init(&pxp->arb_mutex);  in intel_pxp_session_management_init()
185 	INIT_WORK(&pxp->session_work, pxp_session_work);  in intel_pxp_session_management_init()