From patchwork Thu Sep 9 12:29:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniele Ceraolo Spurio X-Patchwork-Id: 12483013 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C19AC43217 for ; Thu, 9 Sep 2021 12:32:30 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EC0ED610FF for ; Thu, 9 Sep 2021 12:32:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org EC0ED610FF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C373A6E870; Thu, 9 Sep 2021 12:32:00 +0000 (UTC) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 75A6E6E86A; Thu, 9 Sep 2021 12:31:57 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10101"; a="208005399" X-IronPort-AV: E=Sophos;i="5.85,280,1624345200"; d="scan'208";a="208005399" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Sep 2021 05:31:57 -0700 X-IronPort-AV: E=Sophos;i="5.85,280,1624345200"; d="scan'208";a="470057686" Received: from valcore-skull-1.fm.intel.com ([10.1.27.19]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Sep 2021 05:31:57 -0700 From: Daniele Ceraolo Spurio To: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org, Vitaly Lubart , Tomas Winkler , Daniele Ceraolo Spurio , Rodrigo Vivi Date: Thu, 9 Sep 2021 05:29:00 -0700 Message-Id: <20210909122915.971652-3-daniele.ceraolospurio@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210909122915.971652-1-daniele.ceraolospurio@intel.com> References: <20210909122915.971652-1-daniele.ceraolospurio@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v8 02/17] mei: pxp: export pavp client to me client bus X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Vitaly Lubart Export PAVP client to work with i915 driver, for binding it uses kernel component framework. v2:drop debug prints, refactor match code to match mei_hdcp (Tomas) Signed-off-by: Vitaly Lubart Signed-off-by: Tomas Winkler Signed-off-by: Daniele Ceraolo Spurio Reviewed-by: Rodrigo Vivi --- drivers/misc/mei/Kconfig | 2 + drivers/misc/mei/Makefile | 1 + drivers/misc/mei/pxp/Kconfig | 13 ++ drivers/misc/mei/pxp/Makefile | 7 + drivers/misc/mei/pxp/mei_pxp.c | 229 +++++++++++++++++++++++++++++++++ drivers/misc/mei/pxp/mei_pxp.h | 18 +++ 6 files changed, 270 insertions(+) create mode 100644 drivers/misc/mei/pxp/Kconfig create mode 100644 drivers/misc/mei/pxp/Makefile create mode 100644 drivers/misc/mei/pxp/mei_pxp.c create mode 100644 drivers/misc/mei/pxp/mei_pxp.h diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig index f5fd5b786607..0e0bcd0da852 100644 --- a/drivers/misc/mei/Kconfig +++ b/drivers/misc/mei/Kconfig @@ -47,3 +47,5 @@ config INTEL_MEI_TXE Intel Bay Trail source "drivers/misc/mei/hdcp/Kconfig" +source "drivers/misc/mei/pxp/Kconfig" + diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile index f1c76f7ee804..d8e5165917f2 100644 --- a/drivers/misc/mei/Makefile +++ b/drivers/misc/mei/Makefile @@ -26,3 +26,4 @@ mei-$(CONFIG_EVENT_TRACING) += mei-trace.o CFLAGS_mei-trace.o = -I$(src) obj-$(CONFIG_INTEL_MEI_HDCP) += hdcp/ +obj-$(CONFIG_INTEL_MEI_PXP) += pxp/ diff --git a/drivers/misc/mei/pxp/Kconfig b/drivers/misc/mei/pxp/Kconfig new file mode 100644 index 000000000000..4029b96afc04 --- /dev/null +++ b/drivers/misc/mei/pxp/Kconfig @@ -0,0 +1,13 @@ + +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2020, Intel Corporation. All rights reserved. +# +config INTEL_MEI_PXP + tristate "Intel PXP services of ME Interface" + select INTEL_MEI_ME + depends on DRM_I915 + help + MEI Support for PXP Services on Intel platforms. + + Enables the ME FW services required for PXP support through + I915 display driver of Intel. diff --git a/drivers/misc/mei/pxp/Makefile b/drivers/misc/mei/pxp/Makefile new file mode 100644 index 000000000000..0329950d5794 --- /dev/null +++ b/drivers/misc/mei/pxp/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2020, Intel Corporation. All rights reserved. +# +# Makefile - PXP client driver for Intel MEI Bus Driver. + +obj-$(CONFIG_INTEL_MEI_PXP) += mei_pxp.o diff --git a/drivers/misc/mei/pxp/mei_pxp.c b/drivers/misc/mei/pxp/mei_pxp.c new file mode 100644 index 000000000000..f7380d387bab --- /dev/null +++ b/drivers/misc/mei/pxp/mei_pxp.c @@ -0,0 +1,229 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright © 2020 - 2021 Intel Corporation + */ + +/** + * DOC: MEI_PXP Client Driver + * + * The mei_pxp driver acts as a translation layer between PXP + * protocol implementer (I915) and ME FW by translating PXP + * negotiation messages to ME FW command payloads and vice versa. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "mei_pxp.h" + +/** + * mei_pxp_send_message() - Sends a PXP message to ME FW. + * @dev: device corresponding to the mei_cl_device + * @message: a message buffer to send + * @size: size of the message + * Return: 0 on Success, <0 on Failure + */ +static int +mei_pxp_send_message(struct device *dev, const void *message, size_t size) +{ + struct mei_cl_device *cldev; + ssize_t byte; + + if (!dev || !message) + return -EINVAL; + + cldev = to_mei_cl_device(dev); + + /* temporary drop const qualifier till the API is fixed */ + byte = mei_cldev_send(cldev, (u8 *)message, size); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte); + return byte; + } + + return 0; +} + +/** + * mei_pxp_receive_message() - Receives a PXP message from ME FW. + * @dev: device corresponding to the mei_cl_device + * @buffer: a message buffer to contain the received message + * @size: size of the buffer + * Return: bytes sent on Success, <0 on Failure + */ +static int +mei_pxp_receive_message(struct device *dev, void *buffer, size_t size) +{ + struct mei_cl_device *cldev; + ssize_t byte; + + if (!dev || !buffer) + return -EINVAL; + + cldev = to_mei_cl_device(dev); + + byte = mei_cldev_recv(cldev, buffer, size); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte); + return byte; + } + + return byte; +} + +static const struct i915_pxp_component_ops mei_pxp_ops = { + .owner = THIS_MODULE, + .send = mei_pxp_send_message, + .recv = mei_pxp_receive_message, +}; + +static int mei_component_master_bind(struct device *dev) +{ + struct mei_cl_device *cldev = to_mei_cl_device(dev); + struct i915_pxp_component *comp_master = mei_cldev_get_drvdata(cldev); + int ret; + + comp_master->ops = &mei_pxp_ops; + comp_master->tee_dev = dev; + ret = component_bind_all(dev, comp_master); + if (ret < 0) + return ret; + + return 0; +} + +static void mei_component_master_unbind(struct device *dev) +{ + struct mei_cl_device *cldev = to_mei_cl_device(dev); + struct i915_pxp_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_pxp_component_match - compare function for matching mei pxp. + * + * The function checks if the driver is i915, the subcomponent is PXP + * and the grand parent of pxp and the parent of i915 are the same + * PCH device. + * + * @dev: master device + * @subcomponent: subcomponent to match (I915_COMPONENT_PXP) + * @data: compare data (mei pxp device) + * + * Return: + * * 1 - if components match + * * 0 - otherwise + */ +static int mei_pxp_component_match(struct device *dev, int subcomponent, + void *data) +{ + struct device *base = data; + + if (strcmp(dev->driver->name, "i915") || + subcomponent != I915_COMPONENT_PXP) + return 0; + + base = base->parent; + if (!base) + return 0; + + base = base->parent; + dev = dev->parent; + + return (base && dev && dev == base); +} + +static int mei_pxp_probe(struct mei_cl_device *cldev, + const struct mei_cl_device_id *id) +{ + struct i915_pxp_component *comp_master; + struct component_match *master_match; + 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; + } + + master_match = NULL; + component_match_add_typed(&cldev->dev, &master_match, + mei_pxp_component_match, &cldev->dev); + 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_pxp_remove(struct mei_cl_device *cldev) +{ + struct i915_pxp_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\n"); +} + +/* fbf6fcf1-96cf-4e2e-a6a6-1bab8cbe36b1 : PAVP GUID*/ +#define MEI_GUID_PXP GUID_INIT(0xfbf6fcf1, 0x96cf, 0x4e2e, 0xA6, \ + 0xa6, 0x1b, 0xab, 0x8c, 0xbe, 0x36, 0xb1) + +static struct mei_cl_device_id mei_pxp_tbl[] = { + { .uuid = MEI_GUID_PXP, .version = MEI_CL_VERSION_ANY }, + { } +}; +MODULE_DEVICE_TABLE(mei, mei_pxp_tbl); + +static struct mei_cl_driver mei_pxp_driver = { + .id_table = mei_pxp_tbl, + .name = KBUILD_MODNAME, + .probe = mei_pxp_probe, + .remove = mei_pxp_remove, +}; + +module_mei_cl_driver(mei_pxp_driver); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("MEI PXP"); diff --git a/drivers/misc/mei/pxp/mei_pxp.h b/drivers/misc/mei/pxp/mei_pxp.h new file mode 100644 index 000000000000..e7b15373fefd --- /dev/null +++ b/drivers/misc/mei/pxp/mei_pxp.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright © 2020 Intel Corporation + * + * Authors: + * Vitaly Lubart + */ + +#ifndef __MEI_PXP_H__ +#define __MEI_PXP_H__ + +/* me_pxp_status: Enumeration of all PXP Status Codes */ +enum me_pxp_status { + ME_PXP_STATUS_SUCCESS = 0x0000, + +}; + +#endif /* __MEI_PXP_H__ */