linux-kernel - [char-misc-next v3 1/2] drm/i915/mtl: Define GSC Proxy component interface

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Date:   Wed,  8 Feb 2023 16:23:57 +0200
From:   Tomas Winkler <tomas.winkler@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Alexander Usyskin <alexander.usyskin@...el.com>,
        Vitaly Lubart <vitaly.lubart@...el.com>,
        Ceraolo Spurio Daniele <daniele.ceraolospurio@...el.com>,
        Alan Previn <alan.previn.teres.alexis@...el.com>,
        linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
        Tomas Winkler <tomas.winkler@...el.com>
Subject: [char-misc-next v3 1/2] drm/i915/mtl: Define GSC Proxy component interface

From: Alexander Usyskin <alexander.usyskin@...el.com>

GSC Proxy component is used for communication between the
Intel graphics driver and MEI driver.

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@...el.com>
Cc: Alan Previn <alan.previn.teres.alexis@...el.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
V2: This patch was missing in the first series
V3: Don't maintain the interface header under mei
    but under drm

 include/drm/i915_component.h               |  3 +-
 include/drm/i915_gsc_proxy_mei_interface.h | 36 ++++++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)
 create mode 100644 include/drm/i915_gsc_proxy_mei_interface.h

diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
index c1e2a43d2d1e..56a84ee1c64c 100644
--- a/include/drm/i915_component.h
+++ b/include/drm/i915_component.h
@@ -29,7 +29,8 @@
 enum i915_component_type {
 	I915_COMPONENT_AUDIO = 1,
 	I915_COMPONENT_HDCP,
-	I915_COMPONENT_PXP
+	I915_COMPONENT_PXP,
+	I915_COMPONENT_GSC_PROXY,
 };
 
 /* MAX_PORT is the number of port
diff --git a/include/drm/i915_gsc_proxy_mei_interface.h b/include/drm/i915_gsc_proxy_mei_interface.h
new file mode 100644
index 000000000000..e817bb316d5c
--- /dev/null
+++ b/include/drm/i915_gsc_proxy_mei_interface.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright (c) 2022-2023 Intel Corporation
+ */
+
+#ifndef _I915_GSC_PROXY_MEI_INTERFACE_H_
+#define _I915_GSC_PROXY_MEI_INTERFACE_H_
+
+#include <linux/mutex.h>
+#include <linux/device.h>
+
+/**
+ * struct i915_gsc_proxy_component_ops - ops for GSC Proxy services.
+ * @owner: Module providing the ops
+ * @send: sends data through GSC proxy
+ * @recv: receives data through GSC proxy
+ */
+struct i915_gsc_proxy_component_ops {
+	struct module *owner;
+
+	int (*send)(struct device *dev, const void *buf, size_t size);
+	int (*recv)(struct device *dev, void *buf, size_t size);
+};
+
+/**
+ * struct i915_gsc_proxy_component - Used for communication between i915 and
+ * MEI drivers for GSC proxy services
+ * @mei_dev: device that provide the GSC proxy service.
+ * @ops: Ops implemented by GSC proxy driver, used by i915 driver.
+ */
+struct i915_gsc_proxy_component {
+	struct device *mei_dev;
+	const struct i915_gsc_proxy_component_ops *ops;
+};
+
+#endif /* _I915_GSC_PROXY_MEI_INTERFACE_H_ */
-- 
2.39.1