On Thu, Jun 10, 2021 at 03:58:13PM -0700, Daniele Ceraolo Spurio wrote: > > > On 6/2/2021 9:20 AM, Rodrigo Vivi wrote: > > On Mon, May 24, 2021 at 10:47:59PM -0700, Daniele Ceraolo Spurio wrote: > > > From: "Huang, Sean Z" <sean.z.huang@xxxxxxxxx> > > > > > > During the power event S3+ sleep/resume, hardware will lose all the > > > encryption keys for every hardware session, even though the > > > session state might still be marked as alive after resume. Therefore, > > > we should consider the session as dead on suspend and invalidate all the > > > objects. The session will be automatically restarted on the first > > > protected submission on resume. > > > > > > v2: runtime suspend also invalidates the keys > > > v3: fix return codes, simplify rpm ops (Chris), use the new worker func > > > v4: invalidate the objects on suspend, don't re-create the arb sesson on > > > resume (delayed to first submission). > > > > > > Signed-off-by: Huang, Sean Z <sean.z.huang@xxxxxxxxx> > > > Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx> > > > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > > Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > > > --- > > > drivers/gpu/drm/i915/Makefile | 1 + > > > drivers/gpu/drm/i915/gt/intel_gt_pm.c | 15 +++++++- > > > drivers/gpu/drm/i915/i915_drv.c | 2 + > > > drivers/gpu/drm/i915/pxp/intel_pxp_irq.c | 11 ++++-- > > > drivers/gpu/drm/i915/pxp/intel_pxp_pm.c | 40 ++++++++++++++++++++ > > > drivers/gpu/drm/i915/pxp/intel_pxp_pm.h | 23 +++++++++++ > > > drivers/gpu/drm/i915/pxp/intel_pxp_session.c | 38 ++++++++++++++----- > > > drivers/gpu/drm/i915/pxp/intel_pxp_tee.c | 9 +++++ > > > 8 files changed, 124 insertions(+), 15 deletions(-) > > > create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_pm.c > > > create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_pm.h > > > > > > diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile > > > index 29331bbb3e98..9cce0bf9a50f 100644 > > > --- a/drivers/gpu/drm/i915/Makefile > > > +++ b/drivers/gpu/drm/i915/Makefile > > > @@ -278,6 +278,7 @@ i915-$(CONFIG_DRM_I915_PXP) += \ > > > pxp/intel_pxp.o \ > > > pxp/intel_pxp_cmd.o \ > > > pxp/intel_pxp_irq.o \ > > > + pxp/intel_pxp_pm.o \ > > > pxp/intel_pxp_session.o \ > > > pxp/intel_pxp_tee.o > > > diff --git a/drivers/gpu/drm/i915/gt/intel_gt_pm.c b/drivers/gpu/drm/i915/gt/intel_gt_pm.c > > > index aef3084e8b16..91151a02f7a2 100644 > > > --- a/drivers/gpu/drm/i915/gt/intel_gt_pm.c > > > +++ b/drivers/gpu/drm/i915/gt/intel_gt_pm.c > > > @@ -19,6 +19,7 @@ > > > #include "intel_rc6.h" > > > #include "intel_rps.h" > > > #include "intel_wakeref.h" > > > +#include "pxp/intel_pxp_pm.h" > > > static void user_forcewake(struct intel_gt *gt, bool suspend) > > > { > > > @@ -265,6 +266,8 @@ int intel_gt_resume(struct intel_gt *gt) > > > intel_uc_resume(>->uc); > > > + intel_pxp_resume(>->pxp); > > > + > > > user_forcewake(gt, false); > > > out_fw: > > > @@ -299,6 +302,7 @@ void intel_gt_suspend_prepare(struct intel_gt *gt) > > > user_forcewake(gt, true); > > > wait_for_suspend(gt); > > > + intel_pxp_suspend(>->pxp); > > > intel_uc_suspend(>->uc); > > > } > > > @@ -349,6 +353,7 @@ void intel_gt_suspend_late(struct intel_gt *gt) > > > void intel_gt_runtime_suspend(struct intel_gt *gt) > > > { > > > + intel_pxp_suspend(>->pxp); > > > intel_uc_runtime_suspend(>->uc); > > > GT_TRACE(gt, "\n"); > > > @@ -356,11 +361,19 @@ void intel_gt_runtime_suspend(struct intel_gt *gt) > > > int intel_gt_runtime_resume(struct intel_gt *gt) > > > { > > > + int ret; > > > + > > > GT_TRACE(gt, "\n"); > > > intel_gt_init_swizzling(gt); > > > intel_ggtt_restore_fences(gt->ggtt); > > > - return intel_uc_runtime_resume(>->uc); > > > + ret = intel_uc_runtime_resume(>->uc); > > > + if (ret) > > > + return ret; > > > + > > > + intel_pxp_resume(>->pxp); > > > + > > > + return 0; > > > } > > > static ktime_t __intel_gt_get_awake_time(const struct intel_gt *gt) > > > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c > > > index 2f06bb7b3ed2..6543e5577709 100644 > > > --- a/drivers/gpu/drm/i915/i915_drv.c > > > +++ b/drivers/gpu/drm/i915/i915_drv.c > > > @@ -68,6 +68,8 @@ > > > #include "gt/intel_gt_pm.h" > > > #include "gt/intel_rc6.h" > > > +#include "pxp/intel_pxp_pm.h" > > > + > > > #include "i915_debugfs.h" > > > #include "i915_drv.h" > > > #include "i915_ioc32.h" > > > diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c > > > index a230d0034e50..9e5847c653f2 100644 > > > --- a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c > > > +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c > > > @@ -9,6 +9,7 @@ > > > #include "gt/intel_gt_irq.h" > > > #include "i915_irq.h" > > > #include "i915_reg.h" > > > +#include "intel_runtime_pm.h" > > > /** > > > * intel_pxp_irq_handler - Handles PXP interrupts. > > > @@ -62,11 +63,13 @@ void intel_pxp_irq_enable(struct intel_pxp *pxp) > > > struct intel_gt *gt = pxp_to_gt(pxp); > > > spin_lock_irq(>->irq_lock); > > > - if (!pxp->irq_enabled) { > > > + > > > + if (!pxp->irq_enabled) > > > WARN_ON_ONCE(gen11_gt_reset_one_iir(gt, 0, GEN11_KCR)); > > > - __pxp_set_interrupts(gt, GEN12_PXP_INTERRUPTS); > > > - pxp->irq_enabled = true; > > > - } > > > + > > > + __pxp_set_interrupts(gt, GEN12_PXP_INTERRUPTS); > > > + pxp->irq_enabled = true; > > why? > > and if we really need this maybe worth a squash on the other patch or a separated new one? > > I had some troubles with the driver resetting all interrupts on S3 exit > behind the PXP code, so wanted to make sure we always enabled them when we > entered this function. I can squash this change in the patch that adds the > irq logic if you think that's better. yeap, please... squash there or a separated patch explaining your issue. > > > > > > + > > > spin_unlock_irq(>->irq_lock); > > > } > > > diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c > > > new file mode 100644 > > > index 000000000000..400b3a9944c8 > > > --- /dev/null > > > +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c > > > @@ -0,0 +1,40 @@ > > > +// SPDX-License-Identifier: MIT > > > +/* > > > + * Copyright(c) 2020 Intel Corporation. > > > + */ > > > + > > > +#include "intel_pxp.h" > > > +#include "intel_pxp_irq.h" > > > +#include "intel_pxp_pm.h" > > > +#include "intel_pxp_session.h" > > > + > > > +void intel_pxp_suspend(struct intel_pxp *pxp) > > > +{ > > > + if (!intel_pxp_is_enabled(pxp)) > > > + return; > > > + > > > + pxp->arb_is_valid = false; > > > + > > > + /* invalidate protected objects */ > > > + intel_pxp_invalidate(pxp); > > > + > > > + intel_pxp_fini_hw(pxp); > > > + > > > + pxp->global_state_attacked = false; > > this attacked var name is really bad :) > > pxp->hw_state_invalidated? I like this more... but up to you! > > > > > and if we are setting this any time we disable, maybe the it would deserve to be in the fini function... > > but not sure... > > I'd prefer to keep it out of the fini_hw, but I'll double check if I can > wrap it up more nicely. ack! > > > > > > +} > > > + > > > +void intel_pxp_resume(struct intel_pxp *pxp) > > > +{ > > > + if (!intel_pxp_is_enabled(pxp)) > > > + return; > > > + > > > + /* > > > + * The PXP component gets automatically unbound when we go into S3 and > > > + * re-bound after we come out, so in that scenario we can defer the > > > + * hw init to the bind call. > > > + */ > > > + if (!pxp->pxp_component) > > > + return; > > > + > > > + intel_pxp_init_hw(pxp); > > > +} > > > diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_pm.h b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.h > > > new file mode 100644 > > > index 000000000000..6f488789db6a > > > --- /dev/null > > > +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.h > > > @@ -0,0 +1,23 @@ > > > +/* SPDX-License-Identifier: MIT */ > > // SPDX-License-Identifier: MIT > > Don't we use /* for SPDX in headers? Duh! (facepalm) you are right /**/ for .h and // for .c https://www.kernel.org/doc/html/latest/process/license-rules.html sorry > > Daniele > > > > +/* > > > + * Copyright(c) 2020, Intel Corporation. All rights reserved. > > > + */ > > > + > > > +#ifndef __INTEL_PXP_PM_H__ > > > +#define __INTEL_PXP_PM_H__ > > > + > > > +#include "i915_drv.h" > > > + > > > +#ifdef CONFIG_DRM_I915_PXP > > > +void intel_pxp_suspend(struct intel_pxp *pxp); > > > +void intel_pxp_resume(struct intel_pxp *pxp); > > > +#else > > > +static inline void intel_pxp_suspend(struct intel_pxp *pxp) > > > +{ > > > +} > > > +static inline void intel_pxp_resume(struct intel_pxp *pxp) > > > +{ > > > +} > > > +#endif > > > + > > > +#endif /* __INTEL_PXP_PM_H__ */ > > > diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c > > > index c21620916710..893a2bf61b5c 100644 > > > --- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c > > > +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c > > > @@ -21,29 +21,36 @@ > > > static bool intel_pxp_session_is_in_play(struct intel_pxp *pxp, u32 id) > > > { > > > - struct intel_gt *gt = pxp_to_gt(pxp); > > > + struct intel_uncore *uncore = pxp_to_gt(pxp)->uncore; > > > intel_wakeref_t wakeref; > > > u32 sip = 0; > > > - with_intel_runtime_pm(gt->uncore->rpm, wakeref) > > > - sip = intel_uncore_read(gt->uncore, GEN12_KCR_SIP); > > > + /* if we're suspended the session is considered off */ > > > + with_intel_runtime_pm_if_in_use(uncore->rpm, wakeref) > > > + sip = intel_uncore_read(uncore, GEN12_KCR_SIP); > > > return sip & BIT(id); > > > } > > > static int pxp_wait_for_session_state(struct intel_pxp *pxp, u32 id, bool in_play) > > > { > > > - struct intel_gt *gt = pxp_to_gt(pxp); > > > + struct intel_uncore *uncore = pxp_to_gt(pxp)->uncore; > > > intel_wakeref_t wakeref; > > > u32 mask = BIT(id); > > > int ret; > > > - with_intel_runtime_pm(gt->uncore->rpm, wakeref) > > > - ret = intel_wait_for_register(gt->uncore, > > > - GEN12_KCR_SIP, > > > - mask, > > > - in_play ? mask : 0, > > > - 100); > > > + /* if we're suspended the session is considered off */ > > > + wakeref = intel_runtime_pm_get_if_in_use(uncore->rpm); > > > + if (!wakeref) > > > + return in_play ? -ENODEV : 0; > > > + > > > + ret = intel_wait_for_register(uncore, > > > + GEN12_KCR_SIP, > > > + mask, > > > + in_play ? mask : 0, > > > + 100); > > > + > > > + intel_runtime_pm_put(uncore->rpm, wakeref); > > > return ret; > > > } > > > @@ -132,6 +139,7 @@ void intel_pxp_session_work(struct work_struct *work) > > > { > > > struct intel_pxp *pxp = container_of(work, typeof(*pxp), session_work); > > > struct intel_gt *gt = pxp_to_gt(pxp); > > > + intel_wakeref_t wakeref; > > > u32 events = 0; > > > spin_lock_irq(>->irq_lock); > > > @@ -144,6 +152,14 @@ void intel_pxp_session_work(struct work_struct *work) > > > if (events & PXP_INVAL_REQUIRED) > > > intel_pxp_invalidate(pxp); > > > + /* > > > + * If we're processing an event while suspending then don't bother, > > > + * we're going to re-init everything on resume anyway. > > > + */ > > > + wakeref = intel_runtime_pm_get_if_in_use(gt->uncore->rpm); > > > + if (!wakeref) > > > + return; > > > + > > > if (events & PXP_TERMINATION_REQUEST) { > > > events &= ~PXP_TERMINATION_COMPLETE; > > > pxp_terminate(pxp); > > > @@ -151,4 +167,6 @@ void intel_pxp_session_work(struct work_struct *work) > > > if (events & PXP_TERMINATION_COMPLETE) > > > pxp_terminate_complete(pxp); > > > + > > > + intel_runtime_pm_put(gt->uncore->rpm, wakeref); > > > } > > > diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c > > > index 35b3fed4ca2f..0b6098a7b75c 100644 > > > --- a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c > > > +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c > > > @@ -63,14 +63,23 @@ static int intel_pxp_tee_io_message(struct intel_pxp *pxp, > > > static int i915_pxp_tee_component_bind(struct device *i915_kdev, > > > struct device *tee_kdev, void *data) > > > { > > > + struct drm_i915_private *i915 = kdev_to_i915(i915_kdev); > > > struct intel_pxp *pxp = i915_dev_to_pxp(i915_kdev); > > > + intel_wakeref_t wakeref; > > > pxp->pxp_component = data; > > > pxp->pxp_component->tee_dev = tee_kdev; > > > + /* if we are suspended, the HW will be re-initialized on resume */ > > > + wakeref = intel_runtime_pm_get_if_in_use(&i915->runtime_pm); > > > + if (!wakeref) > > > + return 0; > > > + > > > /* the component is required to fully start the PXP HW */ > > > intel_pxp_init_hw(pxp); > > > + intel_runtime_pm_put(&i915->runtime_pm, wakeref); > > > + > > > return 0; > > > } > > > -- > > > 2.29.2 > > > >