diff mbox series

[v9,05/17] drm/i915/pxp: Implement funcs to create the TEE channel

Message ID 20210910153627.1060858-6-daniele.ceraolospurio@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915: Introduce Intel PXP | expand

Commit Message

Daniele Ceraolo Spurio Sept. 10, 2021, 3:36 p.m. UTC
From: "Huang, Sean Z" <sean.z.huang@intel.com>

Implement the funcs to create the TEE channel, so kernel can
send the TEE commands directly to TEE for creating the arbitrary
(default) session.

v2: fix locking, don't pollute dev_priv (Chris)

v3: wait for mei PXP component to be bound.

v4: drop the wait, as the component might be bound after i915 load
completes. We'll instead check when sending a tee message.

v5: fix an issue with mei_pxp module removal

v6: don't use fetch_and_zero in fini (Rodrigo)

Signed-off-by: Huang, Sean Z <sean.z.huang@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/Makefile              |  3 +-
 drivers/gpu/drm/i915/pxp/intel_pxp.c       | 13 ++++
 drivers/gpu/drm/i915/pxp/intel_pxp_tee.c   | 79 ++++++++++++++++++++++
 drivers/gpu/drm/i915/pxp/intel_pxp_tee.h   | 14 ++++
 drivers/gpu/drm/i915/pxp/intel_pxp_types.h |  6 ++
 5 files changed, 114 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

Comments

Rodrigo Vivi Sept. 10, 2021, 6:47 p.m. UTC | #1
On Fri, Sep 10, 2021 at 08:36:15AM -0700, Daniele Ceraolo Spurio wrote:
> From: "Huang, Sean Z" <sean.z.huang@intel.com>
> 
> Implement the funcs to create the TEE channel, so kernel can
> send the TEE commands directly to TEE for creating the arbitrary
> (default) session.
> 
> v2: fix locking, don't pollute dev_priv (Chris)
> 
> v3: wait for mei PXP component to be bound.
> 
> v4: drop the wait, as the component might be bound after i915 load
> completes. We'll instead check when sending a tee message.
> 
> v5: fix an issue with mei_pxp module removal
> 
> v6: don't use fetch_and_zero in fini (Rodrigo)
> 
> Signed-off-by: Huang, Sean Z <sean.z.huang@intel.com>
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
> Cc: Chris Wilson <chris@chris-wilson.co.uk>

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

> ---
>  drivers/gpu/drm/i915/Makefile              |  3 +-
>  drivers/gpu/drm/i915/pxp/intel_pxp.c       | 13 ++++
>  drivers/gpu/drm/i915/pxp/intel_pxp_tee.c   | 79 ++++++++++++++++++++++
>  drivers/gpu/drm/i915/pxp/intel_pxp_tee.h   | 14 ++++
>  drivers/gpu/drm/i915/pxp/intel_pxp_types.h |  6 ++
>  5 files changed, 114 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 23f5bc268962..d39bd0cefc64 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -283,7 +283,8 @@ 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/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
> index 7b2053902146..400deaea2d8a 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"
>  
> @@ -50,7 +51,16 @@ void intel_pxp_init(struct intel_pxp *pxp)
>  	if (ret)
>  		return;
>  
> +	ret = intel_pxp_tee_component_init(pxp);
> +	if (ret)
> +		goto out_context;
> +
>  	drm_info(&gt->i915->drm, "Protected Xe Path (PXP) protected content support initialized\n");
> +
> +	return;
> +
> +out_context:
> +	destroy_vcs_context(pxp);
>  }
>  
>  void intel_pxp_fini(struct intel_pxp *pxp)
> @@ -58,5 +68,8 @@ 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);
> +
>  }
> 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..f1d8de832653
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> @@ -0,0 +1,79 @@
> +// 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"
> +
> +static inline struct intel_pxp *i915_dev_to_pxp(struct device *i915_kdev)
> +{
> +	return &kdev_to_i915(i915_kdev)->gt.pxp;
> +}
> +
> +/**
> + * i915_pxp_tee_component_bind - bind function 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 intel_pxp *pxp = i915_dev_to_pxp(i915_kdev);
> +
> +	pxp->pxp_component = data;
> +	pxp->pxp_component->tee_dev = tee_kdev;
> +
> +	return 0;
> +}
> +
> +static void i915_pxp_tee_component_unbind(struct device *i915_kdev,
> +					  struct device *tee_kdev, void *data)
> +{
> +	struct intel_pxp *pxp = i915_dev_to_pxp(i915_kdev);
> +
> +	pxp->pxp_component = NULL;
> +}
> +
> +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;
> +	}
> +
> +	pxp->pxp_component_added = true;
> +
> +	return 0;
> +}
> +
> +void intel_pxp_tee_component_fini(struct intel_pxp *pxp)
> +{
> +	struct drm_i915_private *i915 = pxp_to_gt(pxp)->i915;
> +
> +	if (!pxp->pxp_component_added)
> +		return;
> +
> +	component_del(i915->drm.dev, &i915_pxp_tee_component_ops);
> +	pxp->pxp_component_added = false;
> +}
> 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__ */
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
> index bd12c520e60a..3a8e17e591bd 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
> @@ -6,9 +6,15 @@
>  #ifndef __INTEL_PXP_TYPES_H__
>  #define __INTEL_PXP_TYPES_H__
>  
> +#include <linux/types.h>
> +
>  struct intel_context;
> +struct i915_pxp_component;
>  
>  struct intel_pxp {
> +	struct i915_pxp_component *pxp_component;
> +	bool pxp_component_added;
> +
>  	struct intel_context *ce;
>  };
>  
> -- 
> 2.25.1
>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 23f5bc268962..d39bd0cefc64 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -283,7 +283,8 @@  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/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 7b2053902146..400deaea2d8a 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"
 
@@ -50,7 +51,16 @@  void intel_pxp_init(struct intel_pxp *pxp)
 	if (ret)
 		return;
 
+	ret = intel_pxp_tee_component_init(pxp);
+	if (ret)
+		goto out_context;
+
 	drm_info(&gt->i915->drm, "Protected Xe Path (PXP) protected content support initialized\n");
+
+	return;
+
+out_context:
+	destroy_vcs_context(pxp);
 }
 
 void intel_pxp_fini(struct intel_pxp *pxp)
@@ -58,5 +68,8 @@  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);
+
 }
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..f1d8de832653
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
@@ -0,0 +1,79 @@ 
+// 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"
+
+static inline struct intel_pxp *i915_dev_to_pxp(struct device *i915_kdev)
+{
+	return &kdev_to_i915(i915_kdev)->gt.pxp;
+}
+
+/**
+ * i915_pxp_tee_component_bind - bind function 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 intel_pxp *pxp = i915_dev_to_pxp(i915_kdev);
+
+	pxp->pxp_component = data;
+	pxp->pxp_component->tee_dev = tee_kdev;
+
+	return 0;
+}
+
+static void i915_pxp_tee_component_unbind(struct device *i915_kdev,
+					  struct device *tee_kdev, void *data)
+{
+	struct intel_pxp *pxp = i915_dev_to_pxp(i915_kdev);
+
+	pxp->pxp_component = NULL;
+}
+
+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;
+	}
+
+	pxp->pxp_component_added = true;
+
+	return 0;
+}
+
+void intel_pxp_tee_component_fini(struct intel_pxp *pxp)
+{
+	struct drm_i915_private *i915 = pxp_to_gt(pxp)->i915;
+
+	if (!pxp->pxp_component_added)
+		return;
+
+	component_del(i915->drm.dev, &i915_pxp_tee_component_ops);
+	pxp->pxp_component_added = false;
+}
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__ */
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
index bd12c520e60a..3a8e17e591bd 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
@@ -6,9 +6,15 @@ 
 #ifndef __INTEL_PXP_TYPES_H__
 #define __INTEL_PXP_TYPES_H__
 
+#include <linux/types.h>
+
 struct intel_context;
+struct i915_pxp_component;
 
 struct intel_pxp {
+	struct i915_pxp_component *pxp_component;
+	bool pxp_component_added;
+
 	struct intel_context *ce;
 };