From patchwork Wed Sep 16 03:48:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boqun Feng X-Patchwork-Id: 11778855 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A87CB139F for ; Wed, 16 Sep 2020 03:50:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8BD6B208E4 for ; Wed, 16 Sep 2020 03:50:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="UBmUL5im" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726421AbgIPDuI (ORCPT ); Tue, 15 Sep 2020 23:50:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726412AbgIPDsp (ORCPT ); Tue, 15 Sep 2020 23:48:45 -0400 Received: from mail-qv1-xf41.google.com (mail-qv1-xf41.google.com [IPv6:2607:f8b0:4864:20::f41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4DCEFC061788; Tue, 15 Sep 2020 20:48:45 -0700 (PDT) Received: by mail-qv1-xf41.google.com with SMTP id z18so2865035qvp.6; Tue, 15 Sep 2020 20:48:45 -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=IPzYc5oOvMVdMHVpg+qxDCWW0PFGNi+WRPFIeIhdQ+4=; b=UBmUL5imT2j/cAef5pU2ubcootYalanp00Q0SOtR0X1Mfwyx/vG8QDzJ4eJixQwFH9 Jw8PfJ9WABmZt/3E4kyhm5eqlc2U4XMDczru8aSqgWLzNIxXY8fhxi4MT3JsQYC13yJe dQ04rZcX1+sdntILqxBpJrd3X3MRzAaSGbyRCDY09IjGS82Rv0X/WAa///spAWDgtVXT Ww0gIASu1wMqkbVhh9C7wu5FdxXGq5ByKaM++yx6X0blwyr3r/Q0/ZkI6aA4nBfpQq7V w7JoNxYdw5pGoT7JvRMV4VPzveKBft5Ej8Ck2+wI7hpF+0tE8NdbDEO0z/6UKziiw7go nVLQ== 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=IPzYc5oOvMVdMHVpg+qxDCWW0PFGNi+WRPFIeIhdQ+4=; b=h1huBabXjP2pJVHmo1d31xwJ7+QKgJ7Fn3MyEuLthDrW9GU7gvkHiTc5iiL+4v/xOT ZK5oXeCogZUKGfZSasHCgk/G+G+hCWIl1u21WPRX3bcb/IPDCdMDHa91O+Zn+9oM6nCE 1uFmruDi/1PNPvrMU+/GdLAVT+A4cFsm1bUEniinqbgZ+i2kLvJ5aXdM+6CVBKWuefBF U+rU4nGoiM6g9hoBzx1iMKyQQ2UFzEcGoZ5Ads9fiju7qMAO5r2ASXMBMi9arSIA2kKm VHo/H4vhvzUsi0oPE1paKxG3jf7afC8Q/RJDyoIAxhFpGZY0nkcspJhEA+vSdvyLYwqa kqIw== X-Gm-Message-State: AOAM5328Om3L4uG0pmYHwN5WGsFBire43+xqV8A9RWWOw1R8BMe1QA65 Ml1nJTox9aWN51psfYf+aAA= X-Google-Smtp-Source: ABdhPJxw67/g8JIwHipwsztQj6OaLWAJc9TPPhurLPhDJ/oaP1keV/t4sSDY07GQIzhJunNP79tamQ== X-Received: by 2002:ad4:4b34:: with SMTP id s20mr5039311qvw.51.1600228123063; Tue, 15 Sep 2020 20:48:43 -0700 (PDT) Received: from auth1-smtp.messagingengine.com (auth1-smtp.messagingengine.com. [66.111.4.227]) by smtp.gmail.com with ESMTPSA id s10sm97289qkg.61.2020.09.15.20.48.41 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 15 Sep 2020 20:48:42 -0700 (PDT) Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailauth.nyi.internal (Postfix) with ESMTP id B6B6527C0054; Tue, 15 Sep 2020 23:48:41 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute3.internal (MEProxy); Tue, 15 Sep 2020 23:48:41 -0400 X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedujedrtddugdeikecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenog fuohhrthgvugftvggtihhpvdculdegtddmnecujfgurhephffvufffkffojghfggfgsedt keertdertddtnecuhfhrohhmpeeuohhquhhnucfhvghnghcuoegsohhquhhnrdhfvghngh esghhmrghilhdrtghomheqnecuggftrfgrthhtvghrnhephedvveetfefgiedutedtfeev vddvleekjeeuffffleeguefhhfejteekieeuueelnecukfhppeehvddrudehhedrudduud drjedunecuvehluhhsthgvrhfuihiivgepjeenucfrrghrrghmpehmrghilhhfrhhomhep sghoqhhunhdomhgvshhmthhprghuthhhphgvrhhsohhnrghlihhthidqieelvdeghedtie egqddujeejkeehheehvddqsghoqhhunhdrfhgvnhhgpeepghhmrghilhdrtghomhesfhhi gihmvgdrnhgrmhgv X-ME-Proxy: Received: from localhost (unknown [52.155.111.71]) by mail.messagingengine.com (Postfix) with ESMTPA id 16516328005E; Tue, 15 Sep 2020 23:48:41 -0400 (EDT) From: Boqun Feng To: linux-hyperv@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-scsi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Jiri Kosina , Benjamin Tissoires , Dmitry Torokhov , "David S. Miller" , Jakub Kicinski , "James E.J. Bottomley" , "Martin K. Petersen" , Michael Kelley , will@kernel.org, ardb@kernel.org, arnd@arndb.de, catalin.marinas@arm.com, mark.rutland@arm.com, maz@kernel.org, Boqun Feng Subject: [PATCH v4 10/11] Driver: hv: util: Use VMBUS_RING_SIZE() for ringbuffer sizes Date: Wed, 16 Sep 2020 11:48:16 +0800 Message-Id: <20200916034817.30282-11-boqun.feng@gmail.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200916034817.30282-1-boqun.feng@gmail.com> References: <20200916034817.30282-1-boqun.feng@gmail.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org For a Hyper-V vmbus, the size of the ringbuffer has two requirements: 1) it has to take one PAGE_SIZE for the header 2) it has to be PAGE_SIZE aligned so that double-mapping can work VMBUS_RING_SIZE() could calculate a correct ringbuffer size which fulfills both requirements, therefore use it to make sure vmbus work when PAGE_SIZE != HV_HYP_PAGE_SIZE (4K). Note that since the argument for VMBUS_RING_SIZE() is the size of payload (data part), so it will be minus 4k (the size of header when PAGE_SIZE = 4k) than the original value to keep the ringbuffer total size unchanged when PAGE_SIZE = 4k. Signed-off-by: Boqun Feng Cc: Michael Kelley Reviewed-by: Michael Kelley --- Michael, I drop your Reviewed-by tag because of the page align issue. Could you review this updated version? Thanks! Regards, Boqun drivers/hv/hv_util.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c index a4e8d96513c2..05566ecdbe4b 100644 --- a/drivers/hv/hv_util.c +++ b/drivers/hv/hv_util.c @@ -500,6 +500,9 @@ static void heartbeat_onchannelcallback(void *context) } } +#define HV_UTIL_RING_SEND_SIZE VMBUS_RING_SIZE(3 * HV_HYP_PAGE_SIZE) +#define HV_UTIL_RING_RECV_SIZE VMBUS_RING_SIZE(3 * HV_HYP_PAGE_SIZE) + static int util_probe(struct hv_device *dev, const struct hv_vmbus_device_id *dev_id) { @@ -530,8 +533,8 @@ static int util_probe(struct hv_device *dev, hv_set_drvdata(dev, srv); - ret = vmbus_open(dev->channel, 4 * HV_HYP_PAGE_SIZE, - 4 * HV_HYP_PAGE_SIZE, NULL, 0, srv->util_cb, + ret = vmbus_open(dev->channel, HV_UTIL_RING_SEND_SIZE, + HV_UTIL_RING_RECV_SIZE, NULL, 0, srv->util_cb, dev->channel); if (ret) goto error; @@ -590,8 +593,8 @@ static int util_resume(struct hv_device *dev) return ret; } - ret = vmbus_open(dev->channel, 4 * HV_HYP_PAGE_SIZE, - 4 * HV_HYP_PAGE_SIZE, NULL, 0, srv->util_cb, + ret = vmbus_open(dev->channel, HV_UTIL_RING_SEND_SIZE, + HV_UTIL_RING_RECV_SIZE, NULL, 0, srv->util_cb, dev->channel); return ret; }