[Intel-gfx] [PATCH 07/15] drm/i915/pxp: load the pxp module when we have a gsc-loaded huc
Daniele Ceraolo Spurio
daniele.ceraolospurio at intel.com
Thu Jun 9 23:19:47 UTC 2022
The mei_pxp module is required to send the command to load authenticate
the HuC to the GSC even if pxp is not in use for protected content
management.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
---
drivers/gpu/drm/i915/Makefile | 10 +++---
drivers/gpu/drm/i915/pxp/intel_pxp.c | 32 +++++++++++++-------
drivers/gpu/drm/i915/pxp/intel_pxp.h | 32 --------------------
drivers/gpu/drm/i915/pxp/intel_pxp_irq.h | 8 +++++
drivers/gpu/drm/i915/pxp/intel_pxp_session.c | 8 ++++-
drivers/gpu/drm/i915/pxp/intel_pxp_session.h | 11 +++++--
drivers/gpu/drm/i915/pxp/intel_pxp_tee.c | 10 ++++--
7 files changed, 57 insertions(+), 54 deletions(-)
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index d2b18f03a33c..5d3aa4807def 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -303,15 +303,17 @@ i915-y += \
i915-y += i915_perf.o
-# Protected execution platform (PXP) support
-i915-$(CONFIG_DRM_I915_PXP) += \
+# Protected execution platform (PXP) support. Base support is required for HuC
+i915-y += \
pxp/intel_pxp.o \
+ pxp/intel_pxp_tee.o
+
+i915-$(CONFIG_DRM_I915_PXP) += \
pxp/intel_pxp_cmd.o \
pxp/intel_pxp_debugfs.o \
pxp/intel_pxp_irq.o \
pxp/intel_pxp_pm.o \
- pxp/intel_pxp_session.o \
- pxp/intel_pxp_tee.o
+ pxp/intel_pxp_session.o
# Post-mortem debug and GPU hang state capture
i915-$(CONFIG_DRM_I915_CAPTURE_ERROR) += i915_gpu_error.o
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 15311eaed848..b602a51c3692 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -103,19 +103,15 @@ static int create_vcs_context(struct intel_pxp *pxp)
static void destroy_vcs_context(struct intel_pxp *pxp)
{
- intel_engine_destroy_pinned_context(fetch_and_zero(&pxp->ce));
+ if (pxp->ce)
+ intel_engine_destroy_pinned_context(fetch_and_zero(&pxp->ce));
}
-void intel_pxp_init(struct intel_pxp *pxp)
+static void pxp_init_full(struct intel_pxp *pxp)
{
struct intel_gt *gt = pxp_to_gt(pxp);
int ret;
- if (!HAS_PXP(gt->i915))
- return;
-
- mutex_init(&pxp->tee_mutex);
-
/*
* we'll use the completion to check if there is a termination pending,
* so we start it as completed and we reinit it when a termination
@@ -124,8 +120,7 @@ void intel_pxp_init(struct intel_pxp *pxp)
init_completion(&pxp->termination);
complete_all(&pxp->termination);
- mutex_init(&pxp->arb_mutex);
- INIT_WORK(&pxp->session_work, intel_pxp_session_work);
+ intel_pxp_session_management_init(pxp);
ret = create_vcs_context(pxp);
if (ret)
@@ -143,11 +138,26 @@ void intel_pxp_init(struct intel_pxp *pxp)
destroy_vcs_context(pxp);
}
-void intel_pxp_fini(struct intel_pxp *pxp)
+void intel_pxp_init(struct intel_pxp *pxp)
{
- if (!intel_pxp_is_enabled(pxp))
+ struct intel_gt *gt = pxp_to_gt(pxp);
+
+ /* we rely on the mei PXP module */
+ if (!IS_ENABLED(CONFIG_INTEL_MEI_PXP))
return;
+ /*
+ * If HuC is loaded by GSC but PXP is disabled, we can skip the init of
+ * the full PXP session/object management and just init the tee channel.
+ */
+ if (HAS_PXP(gt->i915))
+ pxp_init_full(pxp);
+ else if (intel_huc_is_loaded_by_gsc(>->uc.huc) && intel_uc_uses_huc(>->uc))
+ intel_pxp_tee_component_init(pxp);
+}
+
+void intel_pxp_fini(struct intel_pxp *pxp)
+{
pxp->arb_is_valid = false;
intel_pxp_tee_component_fini(pxp);
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.h b/drivers/gpu/drm/i915/pxp/intel_pxp.h
index 73847e535cab..2da309088c6d 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.h
@@ -12,7 +12,6 @@
struct intel_pxp;
struct drm_i915_gem_object;
-#ifdef CONFIG_DRM_I915_PXP
struct intel_gt *pxp_to_gt(const struct intel_pxp *pxp);
bool intel_pxp_is_enabled(const struct intel_pxp *pxp);
bool intel_pxp_is_active(const struct intel_pxp *pxp);
@@ -32,36 +31,5 @@ int intel_pxp_key_check(struct intel_pxp *pxp,
bool assign);
void intel_pxp_invalidate(struct intel_pxp *pxp);
-#else
-static inline void intel_pxp_init(struct intel_pxp *pxp)
-{
-}
-
-static inline void intel_pxp_fini(struct intel_pxp *pxp)
-{
-}
-
-static inline int intel_pxp_start(struct intel_pxp *pxp)
-{
- return -ENODEV;
-}
-
-static inline bool intel_pxp_is_enabled(const struct intel_pxp *pxp)
-{
- return false;
-}
-
-static inline bool intel_pxp_is_active(const struct intel_pxp *pxp)
-{
- return false;
-}
-
-static inline int intel_pxp_key_check(struct intel_pxp *pxp,
- struct drm_i915_gem_object *obj,
- bool assign)
-{
- return -ENODEV;
-}
-#endif
#endif /* __INTEL_PXP_H__ */
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.h b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.h
index 8b5793654844..8c292dc86f68 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.h
@@ -27,6 +27,14 @@ void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir);
static inline void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir)
{
}
+
+static inline void intel_pxp_irq_enable(struct intel_pxp *pxp)
+{
+}
+
+static inline void intel_pxp_irq_disable(struct intel_pxp *pxp)
+{
+}
#endif
#endif /* __INTEL_PXP_IRQ_H__ */
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
index 92b00b4de240..8453e13e9120 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
@@ -137,7 +137,7 @@ static void pxp_terminate_complete(struct intel_pxp *pxp)
complete_all(&pxp->termination);
}
-void intel_pxp_session_work(struct work_struct *work)
+static void 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);
@@ -172,3 +172,9 @@ void intel_pxp_session_work(struct work_struct *work)
intel_runtime_pm_put(gt->uncore->rpm, wakeref);
}
+
+void intel_pxp_session_management_init(struct intel_pxp *pxp)
+{
+ mutex_init(&pxp->arb_mutex);
+ INIT_WORK(&pxp->session_work, pxp_session_work);
+}
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.h b/drivers/gpu/drm/i915/pxp/intel_pxp_session.h
index ba4c9d2b94b7..903ac52cffa1 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.h
@@ -8,8 +8,13 @@
#include <linux/types.h>
-struct work_struct;
-
-void intel_pxp_session_work(struct work_struct *work);
+struct intel_pxp;
+#ifdef CONFIG_DRM_I915_PXP
+void intel_pxp_session_management_init(struct intel_pxp *pxp);
+#else
+static inline void intel_pxp_session_management_init(struct intel_pxp *pxp)
+{
+}
+#endif
#endif /* __INTEL_PXP_SESSION_H__ */
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
index 4b6f5655fab5..2c1fc49ecec1 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
@@ -97,7 +97,8 @@ static int i915_pxp_tee_component_bind(struct device *i915_kdev,
return 0;
/* the component is required to fully start the PXP HW */
- intel_pxp_init_hw(pxp);
+ if (intel_pxp_is_enabled(pxp))
+ intel_pxp_init_hw(pxp);
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
@@ -111,8 +112,9 @@ static void i915_pxp_tee_component_unbind(struct device *i915_kdev,
struct intel_pxp *pxp = i915_dev_to_pxp(i915_kdev);
intel_wakeref_t wakeref;
- with_intel_runtime_pm_if_in_use(&i915->runtime_pm, wakeref)
- intel_pxp_fini_hw(pxp);
+ if (intel_pxp_is_enabled(pxp))
+ with_intel_runtime_pm_if_in_use(&i915->runtime_pm, wakeref)
+ intel_pxp_fini_hw(pxp);
mutex_lock(&pxp->tee_mutex);
pxp->pxp_component = NULL;
@@ -130,6 +132,8 @@ int intel_pxp_tee_component_init(struct intel_pxp *pxp)
struct intel_gt *gt = pxp_to_gt(pxp);
struct drm_i915_private *i915 = gt->i915;
+ mutex_init(&pxp->tee_mutex);
+
ret = component_add_typed(i915->drm.dev, &i915_pxp_tee_component_ops,
I915_COMPONENT_PXP);
if (ret < 0) {
--
2.25.1
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