From patchwork Wed Oct 14 10:43:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coiby Xu X-Patchwork-Id: 269999 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=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 7635AC43467 for ; Wed, 14 Oct 2020 10:44:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1228D221FE for ; Wed, 14 Oct 2020 10:44:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="KapgrmEA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388419AbgJNKn6 (ORCPT ); Wed, 14 Oct 2020 06:43:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53046 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730147AbgJNKnx (ORCPT ); Wed, 14 Oct 2020 06:43:53 -0400 Received: from mail-pj1-x1041.google.com (mail-pj1-x1041.google.com [IPv6:2607:f8b0:4864:20::1041]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2160C0613D5; Wed, 14 Oct 2020 03:43:53 -0700 (PDT) Received: by mail-pj1-x1041.google.com with SMTP id gm14so1308485pjb.2; Wed, 14 Oct 2020 03:43:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=W3D78JnB3JWvtlnY5Ql/e6WWsfNU7jwi9/AJtLMFZTY=; b=KapgrmEA/WHaS+v61nXXg+l4GfVSXCqX2Ug4wCHwGwPhucq6YR0P/xSpRHiqE1PCyu +PUTqZZwZZa1BXHCtcfw8trIw2476f8furqXqjE5liY/cKGJ7kl9q6l1+oV/One3NXUS uDapod6D+kFWsOGSSxPI9jPazns3y13nJCQb5XY1cGZqpqRrGvrgYK3dUtFVfeb2ShxV ftPdiXm+/cIuUL0mUDGS77D7XbIWSynYSg7KLfuw1QaslfKEmSYwoQUjM4kTGMKXAZGK xepG2P1DqNKNjbUlFBPq5gtGhORIEIt0LbrnCLCLfCVB+eT/GL6tCewXXGIDMfz7f/2O l6zg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=W3D78JnB3JWvtlnY5Ql/e6WWsfNU7jwi9/AJtLMFZTY=; b=fkofk19NrPYx8nXHzQdgb55HqGZJDBokdSZKbqjylWn4OSdk5+txkXP1FDh3/Di8hZ fir60NtIb1sX6ZP6ifkTMgeWuFOzoT+NWKTES909Aw5xwvFIiS6CvkwQZ7eopa6sCRa4 l80zwso8lTM3JyJ/Cw12nZ+iJ/+1HHeiXirFx8c75lpN8a3NIc63E3prEqIdVxKTxzLa z6IxCkBExOte2npWHrVGn/OWgTN6AyHWz1XXVXm5bVHsU/iobAdZrbvro2FMrZqOp/ic 5eDNVSA9kg1rhqEyFpTLPkYQvWLk3pE3t5Bqffwa2mEVDkoUw2R3ur6oFibOU8bj2WwT 1kEQ== X-Gm-Message-State: AOAM533DqIOSvlnrOGzcMv9h6nT8PGOZyhTWzEYBavHH+0c5ThPA1yPU H0mVMxGh8a0jImJ6xV/zorg= X-Google-Smtp-Source: ABdhPJw7jmQdaX7le3EDyRuKq9wreKdZDW3zZ7R69YsvFSt7oSLtjF+GN5ZoZvGZXMdOgFowRJ5D6w== X-Received: by 2002:a17:902:b60f:b029:d3:df34:31e6 with SMTP id b15-20020a170902b60fb02900d3df3431e6mr3568673pls.59.1602672233172; Wed, 14 Oct 2020 03:43:53 -0700 (PDT) Received: from localhost ([2001:e42:102:1532:160:16:113:140]) by smtp.gmail.com with ESMTPSA id i126sm2932209pfc.48.2020.10.14.03.43.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Oct 2020 03:43:52 -0700 (PDT) From: Coiby Xu To: devel@driverdev.osuosl.org Cc: Benjamin Poirier , Shung-Hsi Yu , Willem de Bruijn , Dan Carpenter , "David S. Miller" , Jakub Kicinski , Jonathan Corbet , netdev@vger.kernel.org (open list:NETWORKING [GENERAL]), linux-doc@vger.kernel.org (open list:DOCUMENTATION), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v2 7/7] staging: qlge: add documentation for debugging qlge Date: Wed, 14 Oct 2020 18:43:06 +0800 Message-Id: <20201014104306.63756-8-coiby.xu@gmail.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201014104306.63756-1-coiby.xu@gmail.com> References: <20201014104306.63756-1-coiby.xu@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Instructions and examples on kernel data structures dumping and coredump. Signed-off-by: Coiby Xu --- .../networking/device_drivers/index.rst | 1 + .../device_drivers/qlogic/index.rst | 18 +++ .../networking/device_drivers/qlogic/qlge.rst | 118 ++++++++++++++++++ MAINTAINERS | 6 + 4 files changed, 143 insertions(+) create mode 100644 Documentation/networking/device_drivers/qlogic/index.rst create mode 100644 Documentation/networking/device_drivers/qlogic/qlge.rst diff --git a/Documentation/networking/device_drivers/index.rst b/Documentation/networking/device_drivers/index.rst index a3113ffd7a16..d8279de7bf25 100644 --- a/Documentation/networking/device_drivers/index.rst +++ b/Documentation/networking/device_drivers/index.rst @@ -15,6 +15,7 @@ Contents: ethernet/index fddi/index hamradio/index + qlogic/index wan/index wifi/index diff --git a/Documentation/networking/device_drivers/qlogic/index.rst b/Documentation/networking/device_drivers/qlogic/index.rst new file mode 100644 index 000000000000..ad05b04286e4 --- /dev/null +++ b/Documentation/networking/device_drivers/qlogic/index.rst @@ -0,0 +1,18 @@ +.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) + +QLogic QLGE Device Drivers +=============================================== + +Contents: + +.. toctree:: + :maxdepth: 2 + + qlge + +.. only:: subproject and html + + Indices + ======= + + * :ref:`genindex` diff --git a/Documentation/networking/device_drivers/qlogic/qlge.rst b/Documentation/networking/device_drivers/qlogic/qlge.rst new file mode 100644 index 000000000000..0b888253d152 --- /dev/null +++ b/Documentation/networking/device_drivers/qlogic/qlge.rst @@ -0,0 +1,118 @@ +.. SPDX-License-Identifier: GPL-2.0 + +======================================= +QLogic QLGE 10Gb Ethernet device driver +======================================= + +This driver use drgn and devlink for debugging. + +Dump kernel data structures in drgn +----------------------------------- + +To dump kernel data structures, the following Python script can be used +in drgn: + +.. code-block:: python + + def align(x, a): + """the alignment a should be a power of 2 + """ + mask = a - 1 + return (x+ mask) & ~mask + + def struct_size(struct_type): + struct_str = "struct {}".format(struct_type) + return sizeof(Object(prog, struct_str, address=0x0)) + + def netdev_priv(netdevice): + NETDEV_ALIGN = 32 + return netdevice.value_() + align(struct_size("net_device"), NETDEV_ALIGN) + + name = 'xxx' + qlge_device = None + netdevices = prog['init_net'].dev_base_head.address_of_() + for netdevice in list_for_each_entry("struct net_device", netdevices, "dev_list"): + if netdevice.name.string_().decode('ascii') == name: + print(netdevice.name) + + ql_adapter = Object(prog, "struct ql_adapter", address=netdev_priv(qlge_device)) + +The struct ql_adapter will be printed in drgn as follows, + + >>> ql_adapter + (struct ql_adapter){ + .ricb = (struct ricb){ + .base_cq = (u8)0, + .flags = (u8)120, + .mask = (__le16)26637, + .hash_cq_id = (u8 [1024]){ 172, 142, 255, 255 }, + .ipv6_hash_key = (__le32 [10]){}, + .ipv4_hash_key = (__le32 [4]){}, + }, + .flags = (unsigned long)0, + .wol = (u32)0, + .nic_stats = (struct nic_stats){ + .tx_pkts = (u64)0, + .tx_bytes = (u64)0, + .tx_mcast_pkts = (u64)0, + .tx_bcast_pkts = (u64)0, + .tx_ucast_pkts = (u64)0, + .tx_ctl_pkts = (u64)0, + .tx_pause_pkts = (u64)0, + ... + }, + .active_vlans = (unsigned long [64]){ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 52780853100545, 18446744073709551615, + 18446619461681283072, 0, 42949673024, 2147483647, + }, + .rx_ring = (struct rx_ring [17]){ + { + .cqicb = (struct cqicb){ + .msix_vect = (u8)0, + .reserved1 = (u8)0, + .reserved2 = (u8)0, + .flags = (u8)0, + .len = (__le16)0, + .rid = (__le16)0, + ... + }, + .cq_base = (void *)0x0, + .cq_base_dma = (dma_addr_t)0, + } + ... + } + } + +coredump via devlink +-------------------- + + +And the coredump obtained via devlink in json format looks like, + +.. code:: shell + + $ devlink health dump show DEVICE reporter coredump -p -j + { + "Core Registers": { + "segment": 1, + "values": [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ] + }, + "Test Logic Regs": { + "segment": 2, + "values": [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ] + }, + "RMII Registers": { + "segment": 3, + "values": [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ] + }, + ... + "Sem Registers": { + "segment": 50, + "values": [ 0,0,0,0 ] + } + } + +When the module parameter qlge_force_coredump is set to be true, the MPI +RISC reset before coredumping. So coredumping will much longer since +devlink tool has to wait for 5 secs for the resetting to be +finished. diff --git a/MAINTAINERS b/MAINTAINERS index 05d9b8c00eed..1def89b15913 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14413,6 +14413,12 @@ L: netdev@vger.kernel.org S: Supported F: drivers/staging/qlge/ +QLOGIC QLGE 10Gb ETHERNET DRIVER +M: Coiby Xu +L: netdev@vger.kernel.org +S: Maintained +F: Documentation/networking/device_drivers/qlogic/qlge.rst + QM1D1B0004 MEDIA DRIVER M: Akihiro Tsukada L: linux-media@vger.kernel.org