Received: by 2002:a05:6a11:4021:0:0:0:0 with SMTP id ky33csp1592456pxb; Thu, 16 Sep 2021 10:36:45 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwK17IFlvzJONdIHJ6eMYsb00DpkoawnRcmRQBf4iQ9Ndw4IhUdwxH/VnodWJ6XD3S6Qvu9 X-Received: by 2002:a17:906:2c09:: with SMTP id e9mr7451521ejh.24.1631813805306; Thu, 16 Sep 2021 10:36:45 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1631813805; cv=pass; d=google.com; s=arc-20160816; b=z5gVdi3xGPqMlSt1iX0tnky4CSj7n3QBLnt1g2QEyWFOVwO25zuHgqkBHAeKDrBi6f BRCxb7LcTJ/SRN4FoC+jGWyvNWUBnPQ8T0vZJn+4xWSXXVSww0n8JM5symHS1BLHD3OO SGlFn9MOn+jla88pRMBe2Zm6nH/imEgk4dc0KtpCVUa8CJWvjXfjurlgPk+frSCUgCYO oPauEW+fmrxqyGxTRbNZxYwi3aJKTaee27T2J7NU/tuc+JuG1F5fjtqeFm5XL6CcUzeW v0ImmfAcRwRKhE2BNg1M2/qHoGdRQTgOJ5hrGazsftx2WL3NG/FQNF7uUljhYKF2nJVN UiFA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=aKXReBysgTP8QJZNhRH3aRPtKwEEVu+i2B6o9bzRsGU=; b=tcbHSIoxSvIiUT/UNANvfaoB6uhzaJek2U870JSrSpctZhRfb6/nIFPWK49Q6JjQHA Z/m7PA4vjKHpemXxdtNkFDX3oV3xRA+ftp9uMOVHPBH+mz+WWhdo95IV9olWcz1tuXi8 ZqOe7GnvUqbqopPBuTEDCEREfSkS3KIsXu0HE5zQj81B9SeSre65qcRdHiXInvfPISHx f6jZmaluN72wWvpRZtQ/QAeNJW2KTX+iERaEVOeWIiySJxgxOKUNk/Z9AdT/ZreuZlHN Ud9dJO48BXW7RqA1PzcYxAfVplnvh+c+ZWMZic8ICDyHg0u2HXdPmOa9Lu8EN6n6CRBX 7tCQ== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@esdhannover.onmicrosoft.com header.s=selector1-esdhannover-onmicrosoft-com header.b=N93mfu5H; arc=pass (i=1 spf=pass spfdomain=esd.eu); 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id o5si4025138edq.513.2021.09.16.10.36.21; Thu, 16 Sep 2021 10:36:45 -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=@esdhannover.onmicrosoft.com header.s=selector1-esdhannover-onmicrosoft-com header.b=N93mfu5H; arc=pass (i=1 spf=pass spfdomain=esd.eu); 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348936AbhIPRci (ORCPT + 99 others); Thu, 16 Sep 2021 13:32:38 -0400 Received: from mail-am6eur05on2106.outbound.protection.outlook.com ([40.107.22.106]:38464 "EHLO EUR05-AM6-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1348167AbhIPRXQ (ORCPT ); Thu, 16 Sep 2021 13:23:16 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=IRCJz3CmBW0S/XLTbTta8VAMaXNYqw5ycjqwaBosBWiiPEY6HD6rZ7BfhD+cQttmjgg1DLk66krGkTvYV/qsGxxk7zj8aK2VwjbeBFOd0Q3pao+jWaTh3usgTofc+mFeucyoOtGKWhuw+PkuPK02H5tMokvKA4nzKpGv2LiLWKCng/7PlrsqUkC9uxeBR/fIpSlgrJpJrL9OMnG0j1tad94WaEGbbpYO12Mh6dvR640ZrPrzf0CtZSFt4KpHlZ07Id4o7zLSWg/uQtoszXgZd1nYbgWOPFJuKogOkOfS7gj+QKqk3gAbc96UrrIYaTYysR98/y9SP6zmlyjIVSkpTw== 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; bh=aKXReBysgTP8QJZNhRH3aRPtKwEEVu+i2B6o9bzRsGU=; b=DpI5Rw/L+7gTAEoe4N6SKOedPenhePzlccGVS+Lsx+tm6xNqUpYsZBQ75KhDEdGEtTkPCZNBRd/dXAb8/5BoZPQfVbC59v+RDbeKoZyK/ZF1CrOQgZ5GHLfm+O+HFwmoiPYELJaLTO8KhFqIiYkM39nogCrMRNLD2JFCZVEGpENFQSdCxEYVsoJG5UWeCVY+oghc27MdMwNfco7DBvdz24Jpp4OACAtTkkJ6dojZBwKe3Hx9WqnouWsiTmrqv4OYk1zRa9Zc8klpBT7xQlDHGTOtL0RTTeNw+H13/ewkDUOiFuqTIwzes8oUr9VLPJUrg7TJqPwNE6Dm2i9z0IF8jA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 217.86.141.140) smtp.rcpttodomain=grandegger.com smtp.mailfrom=esd.eu; dmarc=bestguesspass action=none header.from=esd.eu; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=esdhannover.onmicrosoft.com; s=selector1-esdhannover-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=aKXReBysgTP8QJZNhRH3aRPtKwEEVu+i2B6o9bzRsGU=; b=N93mfu5Hf1XEFIaHn3aV1IWIrGoj5D41ZFJYoC0o/yaunCCIsVgFJfg+B8bnZrYgfwi1kCJKHTNyvx6jI9kHy0N09gz0yGCt6NIHGH/quKLFvUCL0T3Yy52u9ZoFe02g57Mxe6NmfJ5wxifc2sRfLleq5hsVsS40UognrEMAc4I= Received: from DB6PR0402CA0013.eurprd04.prod.outlook.com (2603:10a6:4:91::23) by PA4PR03MB6718.eurprd03.prod.outlook.com (2603:10a6:102:ea::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4523.16; Thu, 16 Sep 2021 17:21:53 +0000 Received: from DB8EUR06FT063.eop-eur06.prod.protection.outlook.com (2603:10a6:4:91:cafe::5a) by DB6PR0402CA0013.outlook.office365.com (2603:10a6:4:91::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4523.16 via Frontend Transport; Thu, 16 Sep 2021 17:21:53 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 217.86.141.140) smtp.mailfrom=esd.eu; grandegger.com; dkim=none (message not signed) header.d=none;grandegger.com; dmarc=bestguesspass action=none header.from=esd.eu; Received-SPF: Pass (protection.outlook.com: domain of esd.eu designates 217.86.141.140 as permitted sender) receiver=protection.outlook.com; client-ip=217.86.141.140; helo=esd-s7.esd; Received: from esd-s7.esd (217.86.141.140) by DB8EUR06FT063.mail.protection.outlook.com (10.233.253.111) with Microsoft SMTP Server id 15.20.4523.14 via Frontend Transport; Thu, 16 Sep 2021 17:21:52 +0000 Received: from esd-s9.esd.local (unknown [10.0.0.190]) by esd-s7.esd (Postfix) with ESMTP id 8DC157C1635; Thu, 16 Sep 2021 19:21:52 +0200 (CEST) Received: by esd-s9.esd.local (Postfix, from userid 2044) id 7FD0CE00E4; Thu, 16 Sep 2021 19:21:52 +0200 (CEST) From: =?UTF-8?q?Stefan=20M=C3=A4tje?= To: linux-can@vger.kernel.org, Marc Kleine-Budde , Wolfgang Grandegger Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 0/2] can: esd: add support for esd GmbH PCIe/402 CAN interface Date: Thu, 16 Sep 2021 19:21:50 +0200 Message-Id: <20210916172152.5127-1-stefan.maetje@esd.eu> X-Mailer: git-send-email 2.19.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4f95e29d-4e9b-4ea0-c4d9-08d9793679eb X-MS-TrafficTypeDiagnostic: PA4PR03MB6718: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5797; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:217.86.141.140;CTRY:DE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:esd-s7.esd;PTR:pd9568d8c.dip0.t-ipconnect.de;CAT:NONE;SFS:(346002)(376002)(136003)(396003)(39840400004)(46966006)(36840700001)(81166007)(5660300002)(2616005)(70206006)(36756003)(336012)(966005)(26005)(186003)(83380400001)(70586007)(356005)(1076003)(42186006)(36860700001)(8936002)(86362001)(508600001)(82310400003)(316002)(8676002)(66574015)(2906002)(47076005)(6266002)(4326008)(110136005);DIR:OUT;SFP:1102; X-OriginatorOrg: esd.eu X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Sep 2021 17:21:52.9225 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4f95e29d-4e9b-4ea0-c4d9-08d9793679eb X-MS-Exchange-CrossTenant-Id: 5a9c3a1d-52db-4235-b74c-9fd851db2e6b X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=5a9c3a1d-52db-4235-b74c-9fd851db2e6b;Ip=[217.86.141.140];Helo=[esd-s7.esd] X-MS-Exchange-CrossTenant-AuthSource: DB8EUR06FT063.eop-eur06.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR03MB6718 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The purpose of this patch is to introduce a new CAN driver to support the esd GmbH 402 family of CAN interface boards. The hardware design is based on a CAN controller implemented in a FPGA attached to a PCIe link. More information on these boards can be found following the links included in the commit message. This patch supports all boards but will operate the CAN-FD capable boards only in Classic-CAN mode. The CAN-FD support will be added when the initial patch has stabilized. The patch is based on the previous work of my former colleague: Link: https://lore.kernel.org/linux-can/1426592308-23817-1-git-send-email-thomas.koerper@esd.eu/ *Note*: scripts/checkpatch.pl still emits the following warnings: - esd_402_pci-core.c:270: Possible unnecessary 'out of memory' message This error message is there to tell the user that the DMA allocation failed and not an allocation for normal kernel memory. - esdacc.h:255: The irq_cnt pointer is still declared volatile and this has a reason and is explained in detail in the header referencing the exception noted in volatile-considered-harmful.rst. Changes in v4: - Fixed the build failure on ARCH=arm64 that was found by the Intel kernel test robot. See https://lore.kernel.org/linux-can/202109120608.7ZbQXkRh-lkp@intel.com/ Removed error monitoring code that used GCC's built-in compiler functions for atomic access (__sync_* functions). GCC versions after 9 (tested with "gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04)") don't implement the intrinsic atomic as in-line code but call "__aarch64_ldadd4_acq_rel" on arm64. This GCC support function is not exported by the kernel and therefore the module build post-processing fails. Removed that code because the error monitoring never showed a problem during the development this year. Changes in v3: - Rework the bus-off restart logic in acc_set_mode() and handle_core_msg_errstatechange() to call netif_wake_queue() from the error active event. - Changed pci402_init_card() to allocate a variable sized array of struct acc_core using devm_kcalloc() instead of using a fixed size array in struct pci402_card. - Changed handle_core_msg_txabort() to release aborted TX frames in TX FIFO order. - Fixed the acc_close() function to abort all pending TX request in esdACC controller. - Fixed counting of transmit aborts in handle_core_msg_txabort(). It is now done like in can_flush_echo_skb(). - Fixed handle_core_msg_buserr() to create error frames including the CAN RX and TX error counters that were missing. - Fixed acc_set_bittiming() neither to touch LOM mode setting of esdACC controller nor to enter or leave RESET mode. The esdACC controller is going active on the CAN bus in acc_open() and is going inactive (RESET mode) again in acc_close(). - Rely on the automatic release of memory fetched by devm_kzalloc(). But still use devm_irq_free() explicitely to make sure that the interrupt handler is disconnected at that point. This avoids a possible crash in non-MSI mode due to the IRQ triggered by another device on the same PCI IRQ line. - Changed to use DMA map API instead of pci_*_consistent compatibility wrappers. - Fixed stale email references and updated copyright information. - Removed any traces of future CAN-FD support. Changes in v2: - Avoid warning triggered by -Wshift-count-overflow on architectures with 32-bit dma_addr_t. - Fixed Makefile not to build the kernel module always. Doing this renamed esd402_pci.c to esd_402_pci-core.c as recommended by Marc. Stefan Mätje (2): MAINTAINERS: add Stefan Mätje as maintainer for the esd electronics GmbH CAN drivers can: esd: add support for esd GmbH PCIe/402 CAN interface family MAINTAINERS | 8 + drivers/net/can/Kconfig | 1 + drivers/net/can/Makefile | 1 + drivers/net/can/esd/Kconfig | 12 + drivers/net/can/esd/Makefile | 7 + drivers/net/can/esd/esd_402_pci-core.c | 501 ++++++++++++++++ drivers/net/can/esd/esdacc.c | 777 +++++++++++++++++++++++++ drivers/net/can/esd/esdacc.h | 380 ++++++++++++ 8 files changed, 1687 insertions(+) create mode 100644 drivers/net/can/esd/Kconfig create mode 100644 drivers/net/can/esd/Makefile create mode 100644 drivers/net/can/esd/esd_402_pci-core.c create mode 100644 drivers/net/can/esd/esdacc.c create mode 100644 drivers/net/can/esd/esdacc.h base-commit: cbe8cd7d83e251bff134a57ea4b6378db992ad82 -- 2.25.1