Received: by 2002:a05:6a10:9848:0:0:0:0 with SMTP id x8csp757400pxf; Wed, 24 Mar 2021 15:28:32 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyzIshDr6lsHdqUEI3SQfbp+CpnUYitbRaY+y+Is0T/vAW9lGooOInV5/O20x58t12Rz7hC X-Received: by 2002:a17:906:1352:: with SMTP id x18mr5925381ejb.545.1616624912307; Wed, 24 Mar 2021 15:28:32 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1616624912; cv=pass; d=google.com; s=arc-20160816; b=xIcR/l3+U74tmxfGyLmLG6hEkyir6qJPhDjCeqHtfVlOFYfOIaa53mZl5v2PULr9ex Al12Dv5G1JVX2d9sZ7fKCB2eKxnahyaniUc0P/OFYQ3oRl2ZybNfTX3h1/fNMIhsmPqI nqy+OwfjRrVv6h4p/gF9dbZubcqhah7Bbs7oCwi+uy8FozFf1xX/pIqesKxQzFCvlHDj BNXiM3RF+qwpRMv7gJz8/4GdPZSM/RbAK5Xx/ljVN+gR6YMC2y5V/VoLPkVX8TQWNJt6 0CGsesJa6deUe7iwWsBViKrj43RlmWsleYvqQuXvimSHp7TRH14UN51o1SVYvU+ec0i1 twxA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:references:in-reply-to:message-id :date:subject:cc:to:from:envelope-to:dkim-signature; bh=KIsBt/MhaPGjr7kWa2UifsTuyQ1AGGIdYW0xt/FxRgk=; b=eZuFOWvoRil05gTseJ0Q5CpoIf4EtLEBBexmcMSAVgCI9NFqehd+4iMRg3dbrh6xRI S0suuK4jHDpFpVutqKgugbut+XwLduU3hJL//Zj/UWEVuPezcYFPhh+P/nUs/j4+g0/T bRrNKf8Nin9KyNNtuYOPdWhLwbFvZiCPNhc+z6Qu/uXWVGjYZByobhAf4BLTyduPm0D+ VI1GVow40zGTkRHBP/k9cBGxa9Xu/ZxL1dObjDc8UFhNUC+eN34rqOaaov4rt713OL7D RHst93+Eg1CpCsKEl+xL1JVAk9bdoUzLFOIP2KhD1s9QSuLH0HIWv8wMWOzRf308ubmL eD3A== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@xilinx.onmicrosoft.com header.s=selector2-xilinx-onmicrosoft-com header.b=RLoelE6L; arc=pass (i=1 spf=pass spfdomain=xilinx.com dmarc=pass fromdomain=xilinx.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=xilinx.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id x21si2759611eju.471.2021.03.24.15.28.09; Wed, 24 Mar 2021 15:28:32 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@xilinx.onmicrosoft.com header.s=selector2-xilinx-onmicrosoft-com header.b=RLoelE6L; arc=pass (i=1 spf=pass spfdomain=xilinx.com dmarc=pass fromdomain=xilinx.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=xilinx.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235310AbhCXFea (ORCPT + 99 others); Wed, 24 Mar 2021 01:34:30 -0400 Received: from mail-bn7nam10on2081.outbound.protection.outlook.com ([40.107.92.81]:29857 "EHLO NAM10-BN7-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S235291AbhCXFd6 (ORCPT ); Wed, 24 Mar 2021 01:33:58 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=leWqiXdPbgloyjDcg2khxitrozTuzB21cj+aZg/MX+5izZ4lWj1P+IFW5lAtvCTzPp4MqIJPsJ1VyjR6dNbW/8WX+EaXvLeUooJapVT0KH7X4HT+vEUlNpDhZI6TPRS7RlNuEiBS7vrlWJEtxiefbDQKdFwLU1MYFqnWdPUGiBoEZDQQfL9WELTbrLxaHX9h5Tja2f+XdyhEpvy3IIzodJgM7E4UifeAeARmxhOzNiaTuoTNnOYPH4wIu+u1sFZaG0g0IzzMXB5JPf2IZrDAYt++cnV9kEHftrXGFr9zaNTr0PXnpBdCMtgdWOOdmtVrssLOj3TDWgIcn6EPQrhVqA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=KIsBt/MhaPGjr7kWa2UifsTuyQ1AGGIdYW0xt/FxRgk=; b=HAgGmyLPQ7mmZLol+jQkEM07DMC/3jmSGxwDXguW/DgC3/+MwNaoqRs9KZeoF50TfZAX+CzvNnQC5jQMTYtF3zFpxe2MUkErX+xibMwZOdt2H4nZc/HFXmVA+4x0LdwwT1ZJRVIfOxPvWWhBrdleMt8doq8OiZsv3B3WYmvaJ/nVBdULtmnFjCfweYy6QuiSQox25+rT3NhNKKuwzYzZKm3g2fZzy5WM2Z9AbZx8bktvwVLqGvc1Blcq0uK8ISvUKS134yrHZ+vQGuV4pcO1NvPph20B0id53vpERm38BPF8MXb4LOwV+W3wlW7UpzpQx+hwIRdLdN2mK6rcOgPlyQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 149.199.62.198) smtp.rcpttodomain=kernel.org smtp.mailfrom=xilinx.com; dmarc=pass (p=none sp=none pct=100) action=none header.from=xilinx.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xilinx.onmicrosoft.com; s=selector2-xilinx-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=KIsBt/MhaPGjr7kWa2UifsTuyQ1AGGIdYW0xt/FxRgk=; b=RLoelE6LWNlC1SS4Vv0qcNQXCdPmgKz+/8LZAIScSoOfSfVKfnrWLGhaIn9TKnuKGpkwOVFH8n2EWochJGzR6hM4vc/odwb8i3oK7U1eDw0Ja89+PbFcZhzEsIwtmfDRwrU9spzPm4MtsKrmn5TgmuCYf26mD6mH4uHWs6CI5w8= Received: from SN6PR16CA0068.namprd16.prod.outlook.com (2603:10b6:805:ca::45) by BY5PR02MB6788.namprd02.prod.outlook.com (2603:10b6:a03:202::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3955.18; Wed, 24 Mar 2021 05:33:56 +0000 Received: from SN1NAM02FT025.eop-nam02.prod.protection.outlook.com (2603:10b6:805:ca:cafe::6e) by SN6PR16CA0068.outlook.office365.com (2603:10b6:805:ca::45) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3977.24 via Frontend Transport; Wed, 24 Mar 2021 05:33:56 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 149.199.62.198) smtp.mailfrom=xilinx.com; kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=pass action=none header.from=xilinx.com; Received-SPF: Pass (protection.outlook.com: domain of xilinx.com designates 149.199.62.198 as permitted sender) receiver=protection.outlook.com; client-ip=149.199.62.198; helo=xsj-pvapexch02.xlnx.xilinx.com; Received: from xsj-pvapexch02.xlnx.xilinx.com (149.199.62.198) by SN1NAM02FT025.mail.protection.outlook.com (10.152.72.87) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.3977.25 via Frontend Transport; Wed, 24 Mar 2021 05:33:55 +0000 Received: from xsj-pvapexch02.xlnx.xilinx.com (172.19.86.41) by xsj-pvapexch02.xlnx.xilinx.com (172.19.86.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Tue, 23 Mar 2021 22:33:46 -0700 Received: from smtp.xilinx.com (172.19.127.96) by xsj-pvapexch02.xlnx.xilinx.com (172.19.86.41) with Microsoft SMTP Server id 15.1.2106.2 via Frontend Transport; Tue, 23 Mar 2021 22:33:46 -0700 Envelope-to: mdf@kernel.org, robh@kernel.org, trix@redhat.com, devicetree@vger.kernel.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org Received: from [172.19.72.212] (port=51034 helo=xsj-xw9400.xilinx.com) by smtp.xilinx.com with esmtp (Exim 4.90) (envelope-from ) id 1lOw9K-0004Vg-5e; Tue, 23 Mar 2021 22:33:46 -0700 Received: by xsj-xw9400.xilinx.com (Postfix, from userid 21952) id 291CD600126; Tue, 23 Mar 2021 22:29:56 -0700 (PDT) From: Lizhi Hou To: CC: Lizhi Hou , , , , , , , , , , , Max Zhen Subject: [PATCH V4 XRT Alveo 07/20] fpga: xrt: root driver infrastructure Date: Tue, 23 Mar 2021 22:29:34 -0700 Message-ID: <20210324052947.27889-8-lizhi.hou@xilinx.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210324052947.27889-1-lizhi.hou@xilinx.com> References: <20210324052947.27889-1-lizhi.hou@xilinx.com> MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: b75507c1-a08a-4ca3-5997-08d8ee866ae9 X-MS-TrafficTypeDiagnostic: BY5PR02MB6788: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:393; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:149.199.62.198;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:xsj-pvapexch02.xlnx.xilinx.com;PTR:unknown-62-198.xilinx.com;CAT:NONE;SFS:(4636009)(376002)(39860400002)(346002)(396003)(136003)(36840700001)(46966006)(8676002)(36860700001)(82310400003)(478600001)(70206006)(36906005)(44832011)(316002)(5660300002)(26005)(107886003)(30864003)(2906002)(70586007)(6916009)(426003)(83380400001)(336012)(7636003)(8936002)(2616005)(186003)(6666004)(47076005)(1076003)(6266002)(54906003)(4326008)(42186006)(356005)(36756003)(82740400003);DIR:OUT;SFP:1101; X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Mar 2021 05:33:55.8821 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b75507c1-a08a-4ca3-5997-08d8ee866ae9 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch02.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: SN1NAM02FT025.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR02MB6788 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Contains common code for all root drivers and handles root calls from platform drivers. This is part of root driver infrastructure. Signed-off-by: Sonal Santan Signed-off-by: Max Zhen Signed-off-by: Lizhi Hou --- drivers/fpga/xrt/include/events.h | 45 +++ drivers/fpga/xrt/include/xroot.h | 117 ++++++ drivers/fpga/xrt/lib/subdev_pool.h | 53 +++ drivers/fpga/xrt/lib/xroot.c | 589 +++++++++++++++++++++++++++++ 4 files changed, 804 insertions(+) create mode 100644 drivers/fpga/xrt/include/events.h create mode 100644 drivers/fpga/xrt/include/xroot.h create mode 100644 drivers/fpga/xrt/lib/subdev_pool.h create mode 100644 drivers/fpga/xrt/lib/xroot.c diff --git a/drivers/fpga/xrt/include/events.h b/drivers/fpga/xrt/include/events.h new file mode 100644 index 000000000000..775171a47c8e --- /dev/null +++ b/drivers/fpga/xrt/include/events.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2021 Xilinx, Inc. + * + * Authors: + * Cheng Zhen + */ + +#ifndef _XRT_EVENTS_H_ +#define _XRT_EVENTS_H_ + +#include "subdev_id.h" + +/* + * Event notification. + */ +enum xrt_events { + XRT_EVENT_TEST = 0, /* for testing */ + /* + * Events related to specific subdev + * Callback arg: struct xrt_event_arg_subdev + */ + XRT_EVENT_POST_CREATION, + XRT_EVENT_PRE_REMOVAL, + /* + * Events related to change of the whole board + * Callback arg: + */ + XRT_EVENT_PRE_HOT_RESET, + XRT_EVENT_POST_HOT_RESET, + XRT_EVENT_PRE_GATE_CLOSE, + XRT_EVENT_POST_GATE_OPEN, +}; + +struct xrt_event_arg_subdev { + enum xrt_subdev_id xevt_subdev_id; + int xevt_subdev_instance; +}; + +struct xrt_event { + enum xrt_events xe_evt; + struct xrt_event_arg_subdev xe_subdev; +}; + +#endif /* _XRT_EVENTS_H_ */ diff --git a/drivers/fpga/xrt/include/xroot.h b/drivers/fpga/xrt/include/xroot.h new file mode 100644 index 000000000000..91c0aeb30bf8 --- /dev/null +++ b/drivers/fpga/xrt/include/xroot.h @@ -0,0 +1,117 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2021 Xilinx, Inc. + * + * Authors: + * Cheng Zhen + */ + +#ifndef _XRT_ROOT_H_ +#define _XRT_ROOT_H_ + +#include +#include +#include "subdev_id.h" +#include "events.h" + +typedef bool (*xrt_subdev_match_t)(enum xrt_subdev_id, + struct platform_device *, void *); +#define XRT_SUBDEV_MATCH_PREV ((xrt_subdev_match_t)-1) +#define XRT_SUBDEV_MATCH_NEXT ((xrt_subdev_match_t)-2) + +/* + * Root calls. + */ +enum xrt_root_cmd { + /* Leaf actions. */ + XRT_ROOT_GET_LEAF = 0, + XRT_ROOT_PUT_LEAF, + XRT_ROOT_GET_LEAF_HOLDERS, + + /* Group actions. */ + XRT_ROOT_CREATE_GROUP, + XRT_ROOT_REMOVE_GROUP, + XRT_ROOT_LOOKUP_GROUP, + XRT_ROOT_WAIT_GROUP_BRINGUP, + + /* Event actions. */ + XRT_ROOT_EVENT_SYNC, + XRT_ROOT_EVENT_ASYNC, + + /* Device info. */ + XRT_ROOT_GET_RESOURCE, + XRT_ROOT_GET_ID, + + /* Misc. */ + XRT_ROOT_HOT_RESET, + XRT_ROOT_HWMON, +}; + +struct xrt_root_get_leaf { + struct platform_device *xpigl_caller_pdev; + xrt_subdev_match_t xpigl_match_cb; + void *xpigl_match_arg; + struct platform_device *xpigl_tgt_pdev; +}; + +struct xrt_root_put_leaf { + struct platform_device *xpipl_caller_pdev; + struct platform_device *xpipl_tgt_pdev; +}; + +struct xrt_root_lookup_group { + struct platform_device *xpilp_pdev; /* caller's pdev */ + xrt_subdev_match_t xpilp_match_cb; + void *xpilp_match_arg; + int xpilp_grp_inst; +}; + +struct xrt_root_get_holders { + struct platform_device *xpigh_pdev; /* caller's pdev */ + char *xpigh_holder_buf; + size_t xpigh_holder_buf_len; +}; + +struct xrt_root_get_res { + struct resource *xpigr_res; +}; + +struct xrt_root_get_id { + unsigned short xpigi_vendor_id; + unsigned short xpigi_device_id; + unsigned short xpigi_sub_vendor_id; + unsigned short xpigi_sub_device_id; +}; + +struct xrt_root_hwmon { + bool xpih_register; + const char *xpih_name; + void *xpih_drvdata; + const struct attribute_group **xpih_groups; + struct device *xpih_hwmon_dev; +}; + +/* + * Callback for leaf to make a root request. Arguments are: parent device, parent cookie, req, + * and arg. + */ +typedef int (*xrt_subdev_root_cb_t)(struct device *, void *, u32, void *); +int xrt_subdev_root_request(struct platform_device *self, u32 cmd, void *arg); + +/* + * Defines physical function (MPF / UPF) specific operations + * needed in common root driver. + */ +struct xroot_physical_function_callback { + void (*xpc_hot_reset)(struct pci_dev *pdev); +}; + +int xroot_probe(struct pci_dev *pdev, struct xroot_physical_function_callback *cb, void **root); +void xroot_remove(void *root); +bool xroot_wait_for_bringup(void *root); +int xroot_add_vsec_node(void *root, char *dtb); +int xroot_create_group(void *xr, char *dtb); +int xroot_add_simple_node(void *root, char *dtb, const char *endpoint); +void xroot_broadcast(void *root, enum xrt_events evt); + +#endif /* _XRT_ROOT_H_ */ diff --git a/drivers/fpga/xrt/lib/subdev_pool.h b/drivers/fpga/xrt/lib/subdev_pool.h new file mode 100644 index 000000000000..09d148e4e7ea --- /dev/null +++ b/drivers/fpga/xrt/lib/subdev_pool.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2021 Xilinx, Inc. + * + * Authors: + * Cheng Zhen + */ + +#ifndef _XRT_SUBDEV_POOL_H_ +#define _XRT_SUBDEV_POOL_H_ + +#include +#include +#include "xroot.h" + +/* + * The struct xrt_subdev_pool manages a list of xrt_subdevs for root and group drivers. + */ +struct xrt_subdev_pool { + struct list_head xsp_dev_list; + struct device *xsp_owner; + struct mutex xsp_lock; /* pool lock */ + bool xsp_closing; +}; + +/* + * Subdev pool helper functions for root and group drivers only. + */ +void xrt_subdev_pool_init(struct device *dev, + struct xrt_subdev_pool *spool); +void xrt_subdev_pool_fini(struct xrt_subdev_pool *spool); +int xrt_subdev_pool_get(struct xrt_subdev_pool *spool, + xrt_subdev_match_t match, + void *arg, struct device *holder_dev, + struct platform_device **pdevp); +int xrt_subdev_pool_put(struct xrt_subdev_pool *spool, + struct platform_device *pdev, + struct device *holder_dev); +int xrt_subdev_pool_add(struct xrt_subdev_pool *spool, + enum xrt_subdev_id id, xrt_subdev_root_cb_t pcb, + void *pcb_arg, char *dtb); +int xrt_subdev_pool_del(struct xrt_subdev_pool *spool, + enum xrt_subdev_id id, int instance); +ssize_t xrt_subdev_pool_get_holders(struct xrt_subdev_pool *spool, + struct platform_device *pdev, + char *buf, size_t len); + +void xrt_subdev_pool_trigger_event(struct xrt_subdev_pool *spool, + enum xrt_events evt); +void xrt_subdev_pool_handle_event(struct xrt_subdev_pool *spool, + struct xrt_event *evt); + +#endif /* _XRT_SUBDEV_POOL_H_ */ diff --git a/drivers/fpga/xrt/lib/xroot.c b/drivers/fpga/xrt/lib/xroot.c new file mode 100644 index 000000000000..03407272650f --- /dev/null +++ b/drivers/fpga/xrt/lib/xroot.c @@ -0,0 +1,589 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Xilinx Alveo FPGA Root Functions + * + * Copyright (C) 2020-2021 Xilinx, Inc. + * + * Authors: + * Cheng Zhen + */ + +#include +#include +#include +#include "xroot.h" +#include "subdev_pool.h" +#include "group.h" +#include "metadata.h" + +#define XROOT_PDEV(xr) ((xr)->pdev) +#define XROOT_DEV(xr) (&(XROOT_PDEV(xr)->dev)) +#define xroot_err(xr, fmt, args...) \ + dev_err(XROOT_DEV(xr), "%s: " fmt, __func__, ##args) +#define xroot_warn(xr, fmt, args...) \ + dev_warn(XROOT_DEV(xr), "%s: " fmt, __func__, ##args) +#define xroot_info(xr, fmt, args...) \ + dev_info(XROOT_DEV(xr), "%s: " fmt, __func__, ##args) +#define xroot_dbg(xr, fmt, args...) \ + dev_dbg(XROOT_DEV(xr), "%s: " fmt, __func__, ##args) + +#define XRT_VSEC_ID 0x20 + +#define XROOT_GROUP_FIRST (-1) +#define XROOT_GROUP_LAST (-2) + +static int xroot_root_cb(struct device *, void *, u32, void *); + +struct xroot_evt { + struct list_head list; + struct xrt_event evt; + struct completion comp; + bool async; +}; + +struct xroot_events { + struct mutex evt_lock; /* event lock */ + struct list_head evt_list; + struct work_struct evt_work; +}; + +struct xroot_groups { + struct xrt_subdev_pool pool; + struct work_struct bringup_work; + atomic_t bringup_pending; + atomic_t bringup_failed; + struct completion bringup_comp; +}; + +struct xroot { + struct pci_dev *pdev; + struct xroot_events events; + struct xroot_groups groups; + struct xroot_physical_function_callback pf_cb; +}; + +struct xroot_group_match_arg { + enum xrt_subdev_id id; + int instance; +}; + +static bool xroot_group_match(enum xrt_subdev_id id, struct platform_device *pdev, void *arg) +{ + struct xroot_group_match_arg *a = (struct xroot_group_match_arg *)arg; + + /* pdev->id is the instance of the subdev. */ + return id == a->id && pdev->id == a->instance; +} + +static int xroot_get_group(struct xroot *xr, int instance, struct platform_device **grpp) +{ + int rc = 0; + struct xrt_subdev_pool *grps = &xr->groups.pool; + struct device *dev = DEV(xr->pdev); + struct xroot_group_match_arg arg = { XRT_SUBDEV_GRP, instance }; + + if (instance == XROOT_GROUP_LAST) { + rc = xrt_subdev_pool_get(grps, XRT_SUBDEV_MATCH_NEXT, + *grpp, dev, grpp); + } else if (instance == XROOT_GROUP_FIRST) { + rc = xrt_subdev_pool_get(grps, XRT_SUBDEV_MATCH_PREV, + *grpp, dev, grpp); + } else { + rc = xrt_subdev_pool_get(grps, xroot_group_match, + &arg, dev, grpp); + } + + if (rc && rc != -ENOENT) + xroot_err(xr, "failed to hold group %d: %d", instance, rc); + return rc; +} + +static void xroot_put_group(struct xroot *xr, struct platform_device *grp) +{ + int inst = grp->id; + int rc = xrt_subdev_pool_put(&xr->groups.pool, grp, DEV(xr->pdev)); + + if (rc) + xroot_err(xr, "failed to release group %d: %d", inst, rc); +} + +static int xroot_trigger_event(struct xroot *xr, struct xrt_event *e, bool async) +{ + struct xroot_evt *enew = vzalloc(sizeof(*enew)); + + if (!enew) + return -ENOMEM; + + enew->evt = *e; + enew->async = async; + init_completion(&enew->comp); + + mutex_lock(&xr->events.evt_lock); + list_add(&enew->list, &xr->events.evt_list); + mutex_unlock(&xr->events.evt_lock); + + schedule_work(&xr->events.evt_work); + + if (async) + return 0; + + wait_for_completion(&enew->comp); + vfree(enew); + return 0; +} + +static void +xroot_group_trigger_event(struct xroot *xr, int inst, enum xrt_events e) +{ + int ret; + struct platform_device *pdev = NULL; + struct xrt_event evt = { 0 }; + + WARN_ON(inst < 0); + /* Only triggers subdev specific events. */ + if (e != XRT_EVENT_POST_CREATION && e != XRT_EVENT_PRE_REMOVAL) { + xroot_err(xr, "invalid event %d", e); + return; + } + + ret = xroot_get_group(xr, inst, &pdev); + if (ret) + return; + + /* Triggers event for children, first. */ + xleaf_call(pdev, XRT_GROUP_TRIGGER_EVENT, (void *)(uintptr_t)e); + + /* Triggers event for itself. */ + evt.xe_evt = e; + evt.xe_subdev.xevt_subdev_id = XRT_SUBDEV_GRP; + evt.xe_subdev.xevt_subdev_instance = inst; + xroot_trigger_event(xr, &evt, false); + + xroot_put_group(xr, pdev); +} + +int xroot_create_group(void *root, char *dtb) +{ + struct xroot *xr = (struct xroot *)root; + int ret; + + atomic_inc(&xr->groups.bringup_pending); + ret = xrt_subdev_pool_add(&xr->groups.pool, XRT_SUBDEV_GRP, xroot_root_cb, xr, dtb); + if (ret >= 0) { + schedule_work(&xr->groups.bringup_work); + } else { + atomic_dec(&xr->groups.bringup_pending); + atomic_inc(&xr->groups.bringup_failed); + xroot_err(xr, "failed to create group: %d", ret); + } + return ret; +} +EXPORT_SYMBOL_GPL(xroot_create_group); + +static int xroot_destroy_single_group(struct xroot *xr, int instance) +{ + struct platform_device *pdev = NULL; + int ret; + + WARN_ON(instance < 0); + ret = xroot_get_group(xr, instance, &pdev); + if (ret) + return ret; + + xroot_group_trigger_event(xr, instance, XRT_EVENT_PRE_REMOVAL); + + /* Now tear down all children in this group. */ + ret = xleaf_call(pdev, XRT_GROUP_FINI_CHILDREN, NULL); + xroot_put_group(xr, pdev); + if (!ret) + ret = xrt_subdev_pool_del(&xr->groups.pool, XRT_SUBDEV_GRP, instance); + + return ret; +} + +static int xroot_destroy_group(struct xroot *xr, int instance) +{ + struct platform_device *target = NULL; + struct platform_device *deps = NULL; + int ret; + + WARN_ON(instance < 0); + /* + * Make sure target group exists and can't go away before + * we remove it's dependents + */ + ret = xroot_get_group(xr, instance, &target); + if (ret) + return ret; + + /* + * Remove all groups depend on target one. + * Assuming subdevs in higher group ID can depend on ones in + * lower ID groups, we remove them in the reservse order. + */ + while (xroot_get_group(xr, XROOT_GROUP_LAST, &deps) != -ENOENT) { + int inst = deps->id; + + xroot_put_group(xr, deps); + /* Reached the target group instance, stop here. */ + if (instance == inst) + break; + xroot_destroy_single_group(xr, inst); + deps = NULL; + } + + /* Now we can remove the target group. */ + xroot_put_group(xr, target); + return xroot_destroy_single_group(xr, instance); +} + +static int xroot_lookup_group(struct xroot *xr, + struct xrt_root_lookup_group *arg) +{ + int rc = -ENOENT; + struct platform_device *grp = NULL; + + while (rc < 0 && xroot_get_group(xr, XROOT_GROUP_LAST, &grp) != -ENOENT) { + if (arg->xpilp_match_cb(XRT_SUBDEV_GRP, grp, arg->xpilp_match_arg)) + rc = grp->id; + xroot_put_group(xr, grp); + } + return rc; +} + +static void xroot_event_work(struct work_struct *work) +{ + struct xroot_evt *tmp; + struct xroot *xr = container_of(work, struct xroot, events.evt_work); + + mutex_lock(&xr->events.evt_lock); + while (!list_empty(&xr->events.evt_list)) { + tmp = list_first_entry(&xr->events.evt_list, struct xroot_evt, list); + list_del(&tmp->list); + mutex_unlock(&xr->events.evt_lock); + + xrt_subdev_pool_handle_event(&xr->groups.pool, &tmp->evt); + + if (tmp->async) + vfree(tmp); + else + complete(&tmp->comp); + + mutex_lock(&xr->events.evt_lock); + } + mutex_unlock(&xr->events.evt_lock); +} + +static void xroot_event_init(struct xroot *xr) +{ + INIT_LIST_HEAD(&xr->events.evt_list); + mutex_init(&xr->events.evt_lock); + INIT_WORK(&xr->events.evt_work, xroot_event_work); +} + +static void xroot_event_fini(struct xroot *xr) +{ + flush_scheduled_work(); + WARN_ON(!list_empty(&xr->events.evt_list)); +} + +static int xroot_get_leaf(struct xroot *xr, struct xrt_root_get_leaf *arg) +{ + int rc = -ENOENT; + struct platform_device *grp = NULL; + + while (rc && xroot_get_group(xr, XROOT_GROUP_LAST, &grp) != -ENOENT) { + rc = xleaf_call(grp, XRT_GROUP_GET_LEAF, arg); + xroot_put_group(xr, grp); + } + return rc; +} + +static int xroot_put_leaf(struct xroot *xr, struct xrt_root_put_leaf *arg) +{ + int rc = -ENOENT; + struct platform_device *grp = NULL; + + while (rc && xroot_get_group(xr, XROOT_GROUP_LAST, &grp) != -ENOENT) { + rc = xleaf_call(grp, XRT_GROUP_PUT_LEAF, arg); + xroot_put_group(xr, grp); + } + return rc; +} + +static int xroot_root_cb(struct device *dev, void *parg, enum xrt_root_cmd cmd, void *arg) +{ + struct xroot *xr = (struct xroot *)parg; + int rc = 0; + + switch (cmd) { + /* Leaf actions. */ + case XRT_ROOT_GET_LEAF: { + struct xrt_root_get_leaf *getleaf = (struct xrt_root_get_leaf *)arg; + + rc = xroot_get_leaf(xr, getleaf); + break; + } + case XRT_ROOT_PUT_LEAF: { + struct xrt_root_put_leaf *putleaf = (struct xrt_root_put_leaf *)arg; + + rc = xroot_put_leaf(xr, putleaf); + break; + } + case XRT_ROOT_GET_LEAF_HOLDERS: { + struct xrt_root_get_holders *holders = (struct xrt_root_get_holders *)arg; + + rc = xrt_subdev_pool_get_holders(&xr->groups.pool, + holders->xpigh_pdev, + holders->xpigh_holder_buf, + holders->xpigh_holder_buf_len); + break; + } + + /* Group actions. */ + case XRT_ROOT_CREATE_GROUP: + rc = xroot_create_group(xr, (char *)arg); + break; + case XRT_ROOT_REMOVE_GROUP: + rc = xroot_destroy_group(xr, (int)(uintptr_t)arg); + break; + case XRT_ROOT_LOOKUP_GROUP: { + struct xrt_root_lookup_group *getgrp = (struct xrt_root_lookup_group *)arg; + + rc = xroot_lookup_group(xr, getgrp); + break; + } + case XRT_ROOT_WAIT_GROUP_BRINGUP: + rc = xroot_wait_for_bringup(xr) ? 0 : -EINVAL; + break; + + /* Event actions. */ + case XRT_ROOT_EVENT_SYNC: + case XRT_ROOT_EVENT_ASYNC: { + bool async = (cmd == XRT_ROOT_EVENT_ASYNC); + struct xrt_event *evt = (struct xrt_event *)arg; + + rc = xroot_trigger_event(xr, evt, async); + break; + } + + /* Device info. */ + case XRT_ROOT_GET_RESOURCE: { + struct xrt_root_get_res *res = (struct xrt_root_get_res *)arg; + + res->xpigr_res = xr->pdev->resource; + break; + } + case XRT_ROOT_GET_ID: { + struct xrt_root_get_id *id = (struct xrt_root_get_id *)arg; + + id->xpigi_vendor_id = xr->pdev->vendor; + id->xpigi_device_id = xr->pdev->device; + id->xpigi_sub_vendor_id = xr->pdev->subsystem_vendor; + id->xpigi_sub_device_id = xr->pdev->subsystem_device; + break; + } + + /* MISC generic PCIE driver functions. */ + case XRT_ROOT_HOT_RESET: { + xr->pf_cb.xpc_hot_reset(xr->pdev); + break; + } + case XRT_ROOT_HWMON: { + struct xrt_root_hwmon *hwmon = (struct xrt_root_hwmon *)arg; + + if (hwmon->xpih_register) { + hwmon->xpih_hwmon_dev = + hwmon_device_register_with_info(DEV(xr->pdev), + hwmon->xpih_name, + hwmon->xpih_drvdata, + NULL, + hwmon->xpih_groups); + } else { + hwmon_device_unregister(hwmon->xpih_hwmon_dev); + } + break; + } + + default: + xroot_err(xr, "unknown IOCTL cmd %d", cmd); + rc = -EINVAL; + break; + } + + return rc; +} + +static void xroot_bringup_group_work(struct work_struct *work) +{ + struct platform_device *pdev = NULL; + struct xroot *xr = container_of(work, struct xroot, groups.bringup_work); + + while (xroot_get_group(xr, XROOT_GROUP_FIRST, &pdev) != -ENOENT) { + int r, i; + + i = pdev->id; + r = xleaf_call(pdev, XRT_GROUP_INIT_CHILDREN, NULL); + xroot_put_group(xr, pdev); + if (r == -EEXIST) + continue; /* Already brough up, nothing to do. */ + if (r) + atomic_inc(&xr->groups.bringup_failed); + + xroot_group_trigger_event(xr, i, XRT_EVENT_POST_CREATION); + + if (atomic_dec_and_test(&xr->groups.bringup_pending)) + complete(&xr->groups.bringup_comp); + } +} + +static void xroot_groups_init(struct xroot *xr) +{ + xrt_subdev_pool_init(DEV(xr->pdev), &xr->groups.pool); + INIT_WORK(&xr->groups.bringup_work, xroot_bringup_group_work); + atomic_set(&xr->groups.bringup_pending, 0); + atomic_set(&xr->groups.bringup_failed, 0); + init_completion(&xr->groups.bringup_comp); +} + +static void xroot_groups_fini(struct xroot *xr) +{ + flush_scheduled_work(); + xrt_subdev_pool_fini(&xr->groups.pool); +} + +int xroot_add_vsec_node(void *root, char *dtb) +{ + struct xroot *xr = (struct xroot *)root; + struct device *dev = DEV(xr->pdev); + struct xrt_md_endpoint ep = { 0 }; + int cap = 0, ret = 0; + u32 off_low, off_high, vsec_bar, header; + u64 vsec_off; + + while ((cap = pci_find_next_ext_capability(xr->pdev, cap, PCI_EXT_CAP_ID_VNDR))) { + pci_read_config_dword(xr->pdev, cap + PCI_VNDR_HEADER, &header); + if (PCI_VNDR_HEADER_ID(header) == XRT_VSEC_ID) + break; + } + if (!cap) { + xroot_info(xr, "No Vendor Specific Capability."); + return -ENOENT; + } + + if (pci_read_config_dword(xr->pdev, cap + 8, &off_low) || + pci_read_config_dword(xr->pdev, cap + 12, &off_high)) { + xroot_err(xr, "pci_read vendor specific failed."); + return -EINVAL; + } + + ep.ep_name = XRT_MD_NODE_VSEC; + ret = xrt_md_add_endpoint(dev, dtb, &ep); + if (ret) { + xroot_err(xr, "add vsec metadata failed, ret %d", ret); + goto failed; + } + + vsec_bar = cpu_to_be32(off_low & 0xf); + ret = xrt_md_set_prop(dev, dtb, XRT_MD_NODE_VSEC, NULL, + XRT_MD_PROP_BAR_IDX, &vsec_bar, sizeof(vsec_bar)); + if (ret) { + xroot_err(xr, "add vsec bar idx failed, ret %d", ret); + goto failed; + } + + vsec_off = cpu_to_be64(((u64)off_high << 32) | (off_low & ~0xfU)); + ret = xrt_md_set_prop(dev, dtb, XRT_MD_NODE_VSEC, NULL, + XRT_MD_PROP_OFFSET, &vsec_off, sizeof(vsec_off)); + if (ret) { + xroot_err(xr, "add vsec offset failed, ret %d", ret); + goto failed; + } + +failed: + return ret; +} +EXPORT_SYMBOL_GPL(xroot_add_vsec_node); + +int xroot_add_simple_node(void *root, char *dtb, const char *endpoint) +{ + struct xroot *xr = (struct xroot *)root; + struct device *dev = DEV(xr->pdev); + struct xrt_md_endpoint ep = { 0 }; + int ret = 0; + + ep.ep_name = endpoint; + ret = xrt_md_add_endpoint(dev, dtb, &ep); + if (ret) + xroot_err(xr, "add %s failed, ret %d", endpoint, ret); + + return ret; +} +EXPORT_SYMBOL_GPL(xroot_add_simple_node); + +bool xroot_wait_for_bringup(void *root) +{ + struct xroot *xr = (struct xroot *)root; + + wait_for_completion(&xr->groups.bringup_comp); + return atomic_read(&xr->groups.bringup_failed) == 0; +} +EXPORT_SYMBOL_GPL(xroot_wait_for_bringup); + +int xroot_probe(struct pci_dev *pdev, struct xroot_physical_function_callback *cb, void **root) +{ + struct device *dev = DEV(pdev); + struct xroot *xr = NULL; + + dev_info(dev, "%s: probing...", __func__); + + xr = devm_kzalloc(dev, sizeof(*xr), GFP_KERNEL); + if (!xr) + return -ENOMEM; + + xr->pdev = pdev; + xr->pf_cb = *cb; + xroot_groups_init(xr); + xroot_event_init(xr); + + *root = xr; + return 0; +} +EXPORT_SYMBOL_GPL(xroot_probe); + +void xroot_remove(void *root) +{ + struct xroot *xr = (struct xroot *)root; + struct platform_device *grp = NULL; + + xroot_info(xr, "leaving..."); + + if (xroot_get_group(xr, XROOT_GROUP_FIRST, &grp) == 0) { + int instance = grp->id; + + xroot_put_group(xr, grp); + xroot_destroy_group(xr, instance); + } + + xroot_event_fini(xr); + xroot_groups_fini(xr); +} +EXPORT_SYMBOL_GPL(xroot_remove); + +void xroot_broadcast(void *root, enum xrt_events evt) +{ + struct xroot *xr = (struct xroot *)root; + struct xrt_event e = { 0 }; + + /* Root pf driver only broadcasts below two events. */ + if (evt != XRT_EVENT_POST_CREATION && evt != XRT_EVENT_PRE_REMOVAL) { + xroot_info(xr, "invalid event %d", evt); + return; + } + + e.xe_evt = evt; + e.xe_subdev.xevt_subdev_id = XRT_ROOT; + e.xe_subdev.xevt_subdev_instance = 0; + xroot_trigger_event(xr, &e, false); +} +EXPORT_SYMBOL_GPL(xroot_broadcast); -- 2.27.0