On 1/11/2023 1:42 PM, Alan Previn wrote:
Add MTL PXP GSC-CS back-end stub functions hook them
up from PXP front-end and PXP session management functions.
Signed-off-by: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/pxp/intel_pxp.c | 19 +++++++++++--
drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.c | 23 +++++++++++++++
drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.h | 30 ++++++++++++++++++++
drivers/gpu/drm/i915/pxp/intel_pxp_session.c | 6 +++-
drivers/gpu/drm/i915/pxp/intel_pxp_types.h | 6 ++++
6 files changed, 81 insertions(+), 4 deletions(-)
This patch is relatively small and it doesn't look like we have any
benefits by introducing the stubs early (please correct me if I'm
wrong), so I suggest to just squash it with the first patch that adds
code to those functions.
create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.c
create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index f47f00b162a4..eae4325310e8 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -330,6 +330,7 @@ i915-y += \
i915-$(CONFIG_DRM_I915_PXP) += \
pxp/intel_pxp_cmd.o \
pxp/intel_pxp_debugfs.o \
+ pxp/intel_pxp_gsccs.o \
pxp/intel_pxp_irq.o \
pxp/intel_pxp_pm.o \
pxp/intel_pxp_session.o
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index cfc9af8b3d21..be52bf92e847 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -12,6 +12,7 @@
#include "i915_drv.h"
#include "intel_pxp.h"
+#include "intel_pxp_gsccs.h"
#include "intel_pxp_irq.h"
#include "intel_pxp_session.h"
#include "intel_pxp_tee.h"
@@ -132,7 +133,10 @@ static void pxp_init_full(struct intel_pxp *pxp)
if (ret)
return;
- ret = intel_pxp_tee_component_init(pxp);
+ if (pxp->uses_gsccs)
+ ret = intel_pxp_gsccs_init(pxp);
+ else
+ ret = intel_pxp_tee_component_init(pxp);
if (ret)
goto out_context;
@@ -157,6 +161,11 @@ static struct intel_gt *find_gt_for_required_teelink(struct drm_i915_private *i9
return NULL;
}
+static bool pxp_has_gsccs(struct drm_i915_private *i915)
+{
+ return (i915->media_gt && HAS_ENGINE(i915->media_gt, GSC0));
+}
+
static struct intel_gt *find_gt_for_required_protected_content(struct drm_i915_private *i915)
{
if (!IS_ENABLED(CONFIG_DRM_I915_PXP) || !INTEL_INFO(i915)->has_pxp)
@@ -167,7 +176,7 @@ static struct intel_gt *find_gt_for_required_protected_content(struct drm_i915_p
* on the media GT. NOTE: if we have a media-tile with a GSC-engine,
* the VDBOX is already present so skip that check
*/
- if (i915->media_gt && HAS_ENGINE(i915->media_gt, GSC0))
+ if (pxp_has_gsccs(i915))
return i915->media_gt;
/*
@@ -208,6 +217,7 @@ int intel_pxp_init(struct drm_i915_private *i915)
return -ENOMEM;
i915->pxp->ctrl_gt = gt;
+ i915->pxp->uses_gsccs = pxp_has_gsccs(i915);
At this point, if we're on a platform with the media GT we've already
selected it, so you can just do HAS_ENGINE(pxp->ctrl_gt, GSC0).
Also, do we really need a local variable to store this info? Can't we
just do HAS_ENGINE(...) where we need it?
Daniele
/*
* If full PXP feature is not available but HuC is loaded by GSC on pre-MTL
@@ -229,7 +239,10 @@ void intel_pxp_fini(struct drm_i915_private *i915)
i915->pxp->arb_is_valid = false;
- intel_pxp_tee_component_fini(i915->pxp);
+ if (i915->pxp->uses_gsccs)
+ intel_pxp_gsccs_fini(i915->pxp);
+ else
+ intel_pxp_tee_component_fini(i915->pxp);
destroy_vcs_context(i915->pxp);
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.c b/drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.c
new file mode 100644
index 000000000000..21400650fc86
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright(c) 2023 Intel Corporation.
+ */
+
+#include "i915_drv.h"
+#include "intel_pxp_types.h"
+#include "intel_pxp_gsccs.h"
+
+int intel_pxp_gsccs_create_session(struct intel_pxp *pxp,
+ int arb_session_id)
+{
+ return -ENODEV;
+}
+
+void intel_pxp_gsccs_fini(struct intel_pxp *pxp)
+{
+}
+
+int intel_pxp_gsccs_init(struct intel_pxp *pxp)
+{
+ return 0;
+}
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.h b/drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.h
new file mode 100644
index 000000000000..07f8c9b6f636
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_gsccs.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright(c) 2022, Intel Corporation. All rights reserved.
+ */
+
+#ifndef __INTEL_PXP_GSCCS_H__
+#define __INTEL_PXP_GSCCS_H__
+
+#include <linux/types.h>
+
+struct intel_pxp;
+
+#ifdef CONFIG_DRM_I915_PXP
+int intel_pxp_gsccs_create_session(struct intel_pxp *pxp,
+ int arb_session_id);
+void intel_pxp_gsccs_fini(struct intel_pxp *pxp);
+int intel_pxp_gsccs_init(struct intel_pxp *pxp);
+
+#else
+static inline void intel_pxp_gsccs_fini(struct intel_pxp *pxp)
+{
+}
+
+static inline int intel_pxp_gsccs_init(struct intel_pxp *pxp)
+{
+ return 0;
+}
+#endif
+
+#endif /*__INTEL_PXP_GSCCS_H__ */
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
index ae413580b81a..080aa2209c5b 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
@@ -7,6 +7,7 @@
#include "intel_pxp.h"
#include "intel_pxp_cmd.h"
+#include "intel_pxp_gsccs.h"
#include "intel_pxp_session.h"
#include "intel_pxp_tee.h"
#include "intel_pxp_types.h"
@@ -66,7 +67,10 @@ static int pxp_create_arb_session(struct intel_pxp *pxp)
return -EEXIST;
}
- ret = intel_pxp_tee_cmd_create_arb_session(pxp, ARB_SESSION);
+ if (pxp->uses_gsccs)
+ ret = intel_pxp_gsccs_create_session(pxp, ARB_SESSION);
+ else
+ ret = intel_pxp_tee_cmd_create_arb_session(pxp, ARB_SESSION);
if (ret) {
drm_err(>->i915->drm, "tee cmd for arb session creation failed\n");
return ret;
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
index 7dc5f08d1583..43aa61c26de5 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
@@ -26,6 +26,12 @@ struct intel_pxp {
*/
struct intel_gt *ctrl_gt;
+ /**
+ * @uses_gsccs: PXP interface for firmware access and pxp-session controls is
+ * via the GSC-CS engine. This is for MTL+ platforms.
+ */
+ bool uses_gsccs;
+
/**
* @pxp_component: i915_pxp_component struct of the bound mei_pxp
* module. Only set and cleared inside component bind/unbind functions,
