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1// SPDX-License-Identifier: MIT2/*3 * Copyright(c) 2020 Intel Corporation.4 */5#include <linux/workqueue.h>6 7#include "gt/intel_gt_irq.h"8#include "gt/intel_gt_regs.h"9#include "gt/intel_gt_types.h"10 11#include "i915_irq.h"12#include "i915_reg.h"13 14#include "intel_pxp.h"15#include "intel_pxp_irq.h"16#include "intel_pxp_session.h"17#include "intel_pxp_types.h"18#include "intel_runtime_pm.h"19 20/**21 * intel_pxp_irq_handler - Handles PXP interrupts.22 * @pxp: pointer to pxp struct23 * @iir: interrupt vector24 */25void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir)26{27 struct intel_gt *gt;28 29 if (GEM_WARN_ON(!intel_pxp_is_enabled(pxp)))30 return;31 32 gt = pxp->ctrl_gt;33 34 lockdep_assert_held(gt->irq_lock);35 36 if (unlikely(!iir))37 return;38 39 if (iir & (GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT |40 GEN12_DISPLAY_APP_TERMINATED_PER_FW_REQ_INTERRUPT)) {41 /* immediately mark PXP as inactive on termination */42 intel_pxp_mark_termination_in_progress(pxp);43 pxp->session_events |= PXP_TERMINATION_REQUEST | PXP_INVAL_REQUIRED |44 PXP_EVENT_TYPE_IRQ;45 }46 47 if (iir & GEN12_DISPLAY_STATE_RESET_COMPLETE_INTERRUPT)48 pxp->session_events |= PXP_TERMINATION_COMPLETE | PXP_EVENT_TYPE_IRQ;49 50 if (pxp->session_events)51 queue_work(system_unbound_wq, &pxp->session_work);52}53 54static inline void __pxp_set_interrupts(struct intel_gt *gt, u32 interrupts)55{56 struct intel_uncore *uncore = gt->uncore;57 const u32 mask = interrupts << 16;58 59 intel_uncore_write(uncore, GEN11_CRYPTO_RSVD_INTR_ENABLE, mask);60 intel_uncore_write(uncore, GEN11_CRYPTO_RSVD_INTR_MASK, ~mask);61}62 63static inline void pxp_irq_reset(struct intel_gt *gt)64{65 spin_lock_irq(gt->irq_lock);66 gen11_gt_reset_one_iir(gt, 0, GEN11_KCR);67 spin_unlock_irq(gt->irq_lock);68}69 70void intel_pxp_irq_enable(struct intel_pxp *pxp)71{72 struct intel_gt *gt = pxp->ctrl_gt;73 74 spin_lock_irq(gt->irq_lock);75 76 if (!pxp->irq_enabled)77 WARN_ON_ONCE(gen11_gt_reset_one_iir(gt, 0, GEN11_KCR));78 79 __pxp_set_interrupts(gt, GEN12_PXP_INTERRUPTS);80 pxp->irq_enabled = true;81 82 spin_unlock_irq(gt->irq_lock);83}84 85void intel_pxp_irq_disable(struct intel_pxp *pxp)86{87 struct intel_gt *gt = pxp->ctrl_gt;88 89 /*90 * We always need to submit a global termination when we re-enable the91 * interrupts, so there is no need to make sure that the session state92 * makes sense at the end of this function. Just make sure this is not93 * called in a path were the driver consider the session as valid and94 * doesn't call a termination on restart.95 */96 GEM_WARN_ON(intel_pxp_is_active(pxp));97 98 spin_lock_irq(gt->irq_lock);99 100 pxp->irq_enabled = false;101 __pxp_set_interrupts(gt, 0);102 103 spin_unlock_irq(gt->irq_lock);104 intel_synchronize_irq(gt->i915);105 106 pxp_irq_reset(gt);107 108 flush_work(&pxp->session_work);109}110