GSC Proxy component is used for communication between the
Intel graphics driver and MEI driver.
Daniele, please ack so that drm part can be merged via Greg's tree.
V2:
1. Add missing patch from the series
2. Use device information instead of driver name
to identify the aggregate device.
V3:
1. Drop MAINTAINERS update
2. Add gfx mailing list and maintanier
Alexander Usyskin (2):
drm/i915/mtl: Define GSC Proxy component interface
mei: gsc_proxy: add gsc proxy driver
drivers/misc/mei/Kconfig | 2 +-
drivers/misc/mei/Makefile | 1 +
drivers/misc/mei/gsc_proxy/Kconfig | 14 ++
drivers/misc/mei/gsc_proxy/Makefile | 7 +
drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c | 208 +++++++++++++++++++++
include/drm/i915_component.h | 3 +-
include/drm/i915_gsc_proxy_mei_interface.h | 36 ++++
7 files changed, 269 insertions(+), 2 deletions(-)
create mode 100644 drivers/misc/mei/gsc_proxy/Kconfig
create mode 100644 drivers/misc/mei/gsc_proxy/Makefile
create mode 100644 drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c
create mode 100644 include/drm/i915_gsc_proxy_mei_interface.h
--
2.39.1
From: Alexander Usyskin <[email protected]>
GSC Proxy component is used for communication between the
Intel graphics driver and MEI driver.
Cc: Daniele Ceraolo Spurio <[email protected]>
Cc: Alan Previn <[email protected]>
Signed-off-by: Alexander Usyskin <[email protected]>
Signed-off-by: Tomas Winkler <[email protected]>
---
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
From: Alexander Usyskin <[email protected]>
Add GSC proxy driver. It to allows messaging between GSC component
on Intel on board graphics card and CSE device.
Cc: Daniele Ceraolo Spurio <[email protected]>
Cc: Alan Previn <[email protected]>
Signed-off-by: Alexander Usyskin <[email protected]>
Signed-off-by: Tomas Winkler <[email protected]>
---
V2: refactor match function
use device information instead of driver name
to identify the aggregate device.
V3: Resend
drivers/misc/mei/Kconfig | 2 +-
drivers/misc/mei/Makefile | 1 +
drivers/misc/mei/gsc_proxy/Kconfig | 14 ++
drivers/misc/mei/gsc_proxy/Makefile | 7 +
drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c | 208 +++++++++++++++++++++
5 files changed, 231 insertions(+), 1 deletion(-)
create mode 100644 drivers/misc/mei/gsc_proxy/Kconfig
create mode 100644 drivers/misc/mei/gsc_proxy/Makefile
create mode 100644 drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c
diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig
index d21486d69df2..37db142de413 100644
--- a/drivers/misc/mei/Kconfig
+++ b/drivers/misc/mei/Kconfig
@@ -62,4 +62,4 @@ config INTEL_MEI_GSC
source "drivers/misc/mei/hdcp/Kconfig"
source "drivers/misc/mei/pxp/Kconfig"
-
+source "drivers/misc/mei/gsc_proxy/Kconfig"
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index fb740d754900..14aee253ae48 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -30,3 +30,4 @@ CFLAGS_mei-trace.o = -I$(src)
obj-$(CONFIG_INTEL_MEI_HDCP) += hdcp/
obj-$(CONFIG_INTEL_MEI_PXP) += pxp/
+obj-$(CONFIG_INTEL_MEI_GSC_PROXY) += gsc_proxy/
diff --git a/drivers/misc/mei/gsc_proxy/Kconfig b/drivers/misc/mei/gsc_proxy/Kconfig
new file mode 100644
index 000000000000..fd45ce8c1df4
--- /dev/null
+++ b/drivers/misc/mei/gsc_proxy/Kconfig
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2022-2023, Intel Corporation. All rights reserved.
+#
+config INTEL_MEI_GSC_PROXY
+ tristate "Intel GSC Proxy services of ME Interface"
+ select INTEL_MEI_ME
+ depends on DRM_I915
+ help
+ MEI Support for GSC Proxy Services on Intel platforms.
+
+ MEI GSC proxy enables messaging between GSC service on
+ Intel graphics on-board card and services on CSE (MEI)
+ firmware residing SoC or PCH.
+
diff --git a/drivers/misc/mei/gsc_proxy/Makefile b/drivers/misc/mei/gsc_proxy/Makefile
new file mode 100644
index 000000000000..358847e9aaa9
--- /dev/null
+++ b/drivers/misc/mei/gsc_proxy/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2022-2023, Intel Corporation. All rights reserved.
+#
+# Makefile - GSC Proxy client driver for Intel MEI Bus Driver.
+
+obj-$(CONFIG_INTEL_MEI_GSC_PROXY) += mei_gsc_proxy.o
diff --git a/drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c b/drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c
new file mode 100644
index 000000000000..953eda1a16fb
--- /dev/null
+++ b/drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022-2023 Intel Corporation
+ */
+
+/**
+ * DOC: MEI_GSC_PROXY Client Driver
+ *
+ * The mei_gsc_proxy driver acts as a translation layer between
+ * proxy user (I915) and ME FW by proxying messages to ME FW
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/uuid.h>
+#include <linux/mei_cl_bus.h>
+#include <linux/component.h>
+#include <drm/drm_connector.h>
+#include <drm/i915_component.h>
+#include <drm/i915_gsc_proxy_mei_interface.h>
+
+/**
+ * mei_gsc_proxy_send - Sends a proxy message to ME FW.
+ * @dev: device corresponding to the mei_cl_device
+ * @buf: a message buffer to send
+ * @size: size of the message
+ * Return: bytes sent on Success, <0 on Failure
+ */
+static int mei_gsc_proxy_send(struct device *dev, const void *buf, size_t size)
+{
+ ssize_t ret;
+
+ if (!dev || !buf)
+ return -EINVAL;
+
+ ret = mei_cldev_send(to_mei_cl_device(dev), buf, size);
+ if (ret < 0)
+ dev_dbg(dev, "mei_cldev_send failed. %zd\n", ret);
+
+ return ret;
+}
+
+/**
+ * mei_gsc_proxy_recv - Receives a proxy message from ME FW.
+ * @dev: device corresponding to the mei_cl_device
+ * @buf: a message buffer to contain the received message
+ * @size: size of the buffer
+ * Return: bytes received on Success, <0 on Failure
+ */
+static int mei_gsc_proxy_recv(struct device *dev, void *buf, size_t size)
+{
+ ssize_t ret;
+
+ if (!dev || !buf)
+ return -EINVAL;
+
+ ret = mei_cldev_recv(to_mei_cl_device(dev), buf, size);
+ if (ret < 0)
+ dev_dbg(dev, "mei_cldev_recv failed. %zd\n", ret);
+
+ return ret;
+}
+
+static const struct i915_gsc_proxy_component_ops mei_gsc_proxy_ops = {
+ .owner = THIS_MODULE,
+ .send = mei_gsc_proxy_send,
+ .recv = mei_gsc_proxy_recv,
+};
+
+static int mei_component_master_bind(struct device *dev)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ struct i915_gsc_proxy_component *comp_master = mei_cldev_get_drvdata(cldev);
+
+ comp_master->ops = &mei_gsc_proxy_ops;
+ comp_master->mei_dev = dev;
+ return component_bind_all(dev, comp_master);
+}
+
+static void mei_component_master_unbind(struct device *dev)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ struct i915_gsc_proxy_component *comp_master = mei_cldev_get_drvdata(cldev);
+
+ component_unbind_all(dev, comp_master);
+}
+
+static const struct component_master_ops mei_component_master_ops = {
+ .bind = mei_component_master_bind,
+ .unbind = mei_component_master_unbind,
+};
+
+/**
+ * mei_gsc_proxy_component_match - compare function for matching mei.
+ *
+ * The function checks if the device is pci device and
+ * Intel VGA adapter, the subcomponent is SW Proxy
+ * and the parent of MEI PCI and the parent of VGA are the same PCH device.
+ *
+ * @dev: master device
+ * @subcomponent: subcomponent to match (I915_COMPONENT_SWPROXY)
+ * @data: compare data (mei pci parent)
+ *
+ * Return:
+ * * 1 - if components match
+ * * 0 - otherwise
+ */
+static int mei_gsc_proxy_component_match(struct device *dev, int subcomponent,
+ void *data)
+{
+ struct pci_dev *pdev;
+
+ if (!dev_is_pci(dev))
+ return 0;
+
+ pdev = to_pci_dev(dev);
+
+ if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8) ||
+ pdev->vendor != PCI_VENDOR_ID_INTEL)
+ return 0;
+
+ if (subcomponent != I915_COMPONENT_GSC_PROXY)
+ return 0;
+
+ return component_compare_dev(dev->parent, ((struct device *)data)->parent);
+}
+
+static int mei_gsc_proxy_probe(struct mei_cl_device *cldev,
+ const struct mei_cl_device_id *id)
+{
+ struct i915_gsc_proxy_component *comp_master;
+ struct component_match *master_match = NULL;
+ int ret;
+
+ ret = mei_cldev_enable(cldev);
+ if (ret < 0) {
+ dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret);
+ goto enable_err_exit;
+ }
+
+ comp_master = kzalloc(sizeof(*comp_master), GFP_KERNEL);
+ if (!comp_master) {
+ ret = -ENOMEM;
+ goto err_exit;
+ }
+
+ component_match_add_typed(&cldev->dev, &master_match,
+ mei_gsc_proxy_component_match, cldev->dev.parent);
+ if (IS_ERR_OR_NULL(master_match)) {
+ ret = -ENOMEM;
+ goto err_exit;
+ }
+
+ mei_cldev_set_drvdata(cldev, comp_master);
+ ret = component_master_add_with_match(&cldev->dev,
+ &mei_component_master_ops,
+ master_match);
+ if (ret < 0) {
+ dev_err(&cldev->dev, "Master comp add failed %d\n", ret);
+ goto err_exit;
+ }
+
+ return 0;
+
+err_exit:
+ mei_cldev_set_drvdata(cldev, NULL);
+ kfree(comp_master);
+ mei_cldev_disable(cldev);
+enable_err_exit:
+ return ret;
+}
+
+static void mei_gsc_proxy_remove(struct mei_cl_device *cldev)
+{
+ struct i915_gsc_proxy_component *comp_master = mei_cldev_get_drvdata(cldev);
+ int ret;
+
+ component_master_del(&cldev->dev, &mei_component_master_ops);
+ kfree(comp_master);
+ mei_cldev_set_drvdata(cldev, NULL);
+
+ ret = mei_cldev_disable(cldev);
+ if (ret)
+ dev_warn(&cldev->dev, "mei_cldev_disable() failed %d\n", ret);
+}
+
+#define MEI_UUID_GSC_PROXY UUID_LE(0xf73db04, 0x97ab, 0x4125, \
+ 0xb8, 0x93, 0xe9, 0x4, 0xad, 0xd, 0x54, 0x64)
+
+static struct mei_cl_device_id mei_gsc_proxy_tbl[] = {
+ { .uuid = MEI_UUID_GSC_PROXY, .version = MEI_CL_VERSION_ANY },
+ { }
+};
+MODULE_DEVICE_TABLE(mei, mei_gsc_proxy_tbl);
+
+static struct mei_cl_driver mei_gsc_proxy_driver = {
+ .id_table = mei_gsc_proxy_tbl,
+ .name = KBUILD_MODNAME,
+ .probe = mei_gsc_proxy_probe,
+ .remove = mei_gsc_proxy_remove,
+};
+
+module_mei_cl_driver(mei_gsc_proxy_driver);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MEI GSC PROXY");
--
2.39.1
On Wed, Feb 08, 2023 at 04:23:56PM +0200, Tomas Winkler wrote:
> GSC Proxy component is used for communication between the
> Intel graphics driver and MEI driver.
>
> Daniele, please ack so that drm part can be merged via Greg's tree.
Cc: Daniele, since he was missing on this submission.
He raise concerns on getting this through another tree since he
has a pending series that uses this interface here. The propagation
at this point will take so long.
Could we do the other way around and get Greg's and your, Thomas',
acks to merge this through our drm-intel trees?
>
> V2:
> 1. Add missing patch from the series
> 2. Use device information instead of driver name
> to identify the aggregate device.
> V3:
> 1. Drop MAINTAINERS update
> 2. Add gfx mailing list and maintanier
>
>
> Alexander Usyskin (2):
> drm/i915/mtl: Define GSC Proxy component interface
> mei: gsc_proxy: add gsc proxy driver
>
> drivers/misc/mei/Kconfig | 2 +-
> drivers/misc/mei/Makefile | 1 +
> drivers/misc/mei/gsc_proxy/Kconfig | 14 ++
> drivers/misc/mei/gsc_proxy/Makefile | 7 +
> drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c | 208 +++++++++++++++++++++
> include/drm/i915_component.h | 3 +-
> include/drm/i915_gsc_proxy_mei_interface.h | 36 ++++
> 7 files changed, 269 insertions(+), 2 deletions(-)
> create mode 100644 drivers/misc/mei/gsc_proxy/Kconfig
> create mode 100644 drivers/misc/mei/gsc_proxy/Makefile
> create mode 100644 drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c
> create mode 100644 include/drm/i915_gsc_proxy_mei_interface.h
>
> --
> 2.39.1
>
On Wed, Feb 08, 2023 at 12:17:23PM -0500, Rodrigo Vivi wrote:
> On Wed, Feb 08, 2023 at 04:23:56PM +0200, Tomas Winkler wrote:
> > GSC Proxy component is used for communication between the
> > Intel graphics driver and MEI driver.
> >
> > Daniele, please ack so that drm part can be merged via Greg's tree.
>
> Cc: Daniele, since he was missing on this submission.
>
> He raise concerns on getting this through another tree since he
> has a pending series that uses this interface here. The propagation
> at this point will take so long.
>
> Could we do the other way around and get Greg's and your, Thomas',
> acks to merge this through our drm-intel trees?
Acked-by: Greg Kroah-Hartman <[email protected]>