From: "Huang, Sean Z" <sean.z.huang@xxxxxxxxx>
Implement the funcs to create the TEE channel, so kernel can
send the TEE commands directly to TEE for creating the arbitrary
(default) session.
Signed-off-by: Huang, Sean Z <sean.z.huang@xxxxxxxxx>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 3 +-
drivers/gpu/drm/i915/i915_drv.c | 1 +
drivers/gpu/drm/i915/i915_drv.h | 6 ++
drivers/gpu/drm/i915/pxp/intel_pxp.c | 10 +++
drivers/gpu/drm/i915/pxp/intel_pxp_tee.c | 86 ++++++++++++++++++++++++
drivers/gpu/drm/i915/pxp/intel_pxp_tee.h | 14 ++++
6 files changed, 119 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
create mode 100644 drivers/gpu/drm/i915/pxp/intel_pxp_tee.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index e2677e8c03e8..f0ba95a2e4fc 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -270,7 +270,8 @@ i915-y += i915_perf.o
# Protected execution platform (PXP) support
i915-$(CONFIG_DRM_I915_PXP) += \
- pxp/intel_pxp.o
+ pxp/intel_pxp.o \
+ pxp/intel_pxp_tee.o
# Post-mortem debug and GPU hang state capture
i915-$(CONFIG_DRM_I915_CAPTURE_ERROR) += i915_gpu_error.o
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 41eea02a9285..d1344eb6c849 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -325,6 +325,7 @@ static int i915_driver_early_probe(struct drm_i915_private *dev_priv)
mutex_init(&dev_priv->wm.wm_mutex);
mutex_init(&dev_priv->pps_mutex);
mutex_init(&dev_priv->hdcp_comp_mutex);
+ mutex_init(&dev_priv->pxp_tee_comp_mutex);
i915_memcpy_init_early(dev_priv);
intel_runtime_pm_init_early(&dev_priv->runtime_pm);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index fe1ff025f961..779eb38add40 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1205,6 +1205,12 @@ struct drm_i915_private {
/* Mutex to protect the above hdcp component related values. */
struct mutex hdcp_comp_mutex;
+ struct i915_pxp_comp_master *pxp_tee_master;
+ bool pxp_tee_comp_added;
+
+ /* Mutex to protect the above pxp_tee component related values. */
+ struct mutex pxp_tee_comp_mutex;
+
I915_SELFTEST_DECLARE(struct i915_selftest_stash selftest;)
/*
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 950daee5b907..3f3eeadb7931 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -3,6 +3,7 @@
* Copyright(c) 2020 Intel Corporation.
*/
#include "intel_pxp.h"
+#include "intel_pxp_tee.h"
#include "gt/intel_context.h"
#include "i915_drv.h"
@@ -67,10 +68,16 @@ void intel_pxp_init(struct intel_pxp *pxp)
if (ret)
goto out_kcr;
+ ret = intel_pxp_tee_component_init(pxp);
+ if (ret)
+ goto out_context;
+
drm_info(>->i915->drm, "Protected Xe Path (PXP) protected content support initialized\n");
return;
+out_context:
+ destroy_vcs_context(pxp);
out_kcr:
kcr_pxp_disable(gt);
}
@@ -82,7 +89,10 @@ void intel_pxp_fini(struct intel_pxp *pxp)
if (!intel_pxp_is_enabled(pxp))
return;
+ intel_pxp_tee_component_fini(pxp);
+
destroy_vcs_context(pxp);
kcr_pxp_disable(gt);
+
}
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
new file mode 100644
index 000000000000..1d2b8c346161
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright(c) 2020 Intel Corporation.
+ */
+
+#include <linux/component.h>
+#include "drm/i915_pxp_tee_interface.h"
+#include "drm/i915_component.h"
+#include "i915_drv.h"
+#include "intel_pxp.h"
+#include "intel_pxp_tee.h"
+
+/**
+ * i915_pxp_tee_component_bind - bind funciton to pass the function pointers to pxp_tee
+ * @i915_kdev: pointer to i915 kernel device
+ * @tee_kdev: pointer to tee kernel device
+ * @data: pointer to pxp_tee_master containing the function pointers
+ *
+ * This bind function is called during the system boot or resume from system sleep.
+ *
+ * Return: return 0 if successful.
+ */
+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);
+
+ mutex_lock(&i915->pxp_tee_comp_mutex);
+ i915->pxp_tee_master = (struct i915_pxp_comp_master *)data;
+ i915->pxp_tee_master->tee_dev = tee_kdev;
+ mutex_unlock(&i915->pxp_tee_comp_mutex);
+
+ return 0;
+}
+
+static void i915_pxp_tee_component_unbind(struct device *i915_kdev,
+ struct device *tee_kdev, void *data)
+{
+ struct drm_i915_private *i915 = kdev_to_i915(i915_kdev);
+
+ mutex_lock(&i915->pxp_tee_comp_mutex);
+ i915->pxp_tee_master = NULL;
+ mutex_unlock(&i915->pxp_tee_comp_mutex);
+}
+
+static const struct component_ops i915_pxp_tee_component_ops = {
+ .bind = i915_pxp_tee_component_bind,
+ .unbind = i915_pxp_tee_component_unbind,
+};
+
+int intel_pxp_tee_component_init(struct intel_pxp *pxp)
+{
+ int ret;
+ struct intel_gt *gt = pxp_to_gt(pxp);
+ struct drm_i915_private *i915 = gt->i915;
+
+ ret = component_add_typed(i915->drm.dev, &i915_pxp_tee_component_ops,
+ I915_COMPONENT_PXP);
+ if (ret < 0) {
+ drm_err(&i915->drm, "Failed to add PXP component (%d)\n", ret);
+ return ret;
+ }
+
+ mutex_lock(&i915->pxp_tee_comp_mutex);
+ i915->pxp_tee_comp_added = true;
+ mutex_unlock(&i915->pxp_tee_comp_mutex);
+
+ return 0;
+}
+
+void intel_pxp_tee_component_fini(struct intel_pxp *pxp)
+{
+ struct intel_gt *gt = pxp_to_gt(pxp);
+ struct drm_i915_private *i915 = gt->i915;
+
+ mutex_lock(&i915->pxp_tee_comp_mutex);
+ if (!i915->pxp_tee_comp_added) {
+ mutex_unlock(&i915->pxp_tee_comp_mutex);
+ return;
+ }
+
+ i915->pxp_tee_comp_added = false;
+ mutex_unlock(&i915->pxp_tee_comp_mutex);
+
+ component_del(i915->drm.dev, &i915_pxp_tee_component_ops);
+}
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.h b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.h
new file mode 100644
index 000000000000..23d050a5d3e7
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright(c) 2020, Intel Corporation. All rights reserved.
+ */
+
+#ifndef __INTEL_PXP_TEE_H__
+#define __INTEL_PXP_TEE_H__
+
+#include "intel_pxp.h"
+
+int intel_pxp_tee_component_init(struct intel_pxp *pxp);
+void intel_pxp_tee_component_fini(struct intel_pxp *pxp);
+
+#endif /* __INTEL_PXP_TEE_H__ */
--
2.29.2
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