From patchwork Wed Jul 20 17:03:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 592345 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31098C433EF for ; Wed, 20 Jul 2022 17:03:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232568AbiGTRD3 (ORCPT ); Wed, 20 Jul 2022 13:03:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60550 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231350AbiGTRD2 (ORCPT ); Wed, 20 Jul 2022 13:03:28 -0400 Received: from mail-pg1-f169.google.com (mail-pg1-f169.google.com [209.85.215.169]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B5E16A9DA for ; Wed, 20 Jul 2022 10:03:28 -0700 (PDT) Received: by mail-pg1-f169.google.com with SMTP id g4so16964053pgc.1 for ; Wed, 20 Jul 2022 10:03:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=2L6icZSqeGSKBB6e3KaeFatL/yTEVdCCO3S/lO2z74U=; b=M8OekGH/98co9LLSMsacHAjJdqCGp66SPdcYYDhjIU98rYE9PoEQPwuSwLeosc83DZ yatlhuqeT2EgnGL8XakgIxi9kFVdxl6G6hLVCbFoIfBpsEYMRG9N3whazSkyZeYBpJzJ MNGMI9Ixin0lVmqZwu9E5nVfL99HqH4J8B95lGFO1wL+OlEduBuavkphJxyiR6gwhYPo gXcAqkRc1Z1l5rIgFICCqiAB3rnUlQLL/TtuDT2/tBoaXiMFzAgzze6kRM1hcuu9xTOr hMyZeKI1cHSk2jlJXcVeeB6HYZFn/q5QHE2S5XGDxQHfs8yJjLxwfSGUqg9k6Y6sLBQR coPg== X-Gm-Message-State: AJIora/+IPrjPToklJpASB0hi7IB4rp5QMA6jnONBOOikAaOkC4z0cGX NsjzDmI6FVb21pzGzwf5MhU= X-Google-Smtp-Source: AGRyM1uYecnGGH//x3fmn87S6ckGImVjCBpVby9gUQs/Ss4ZJ4GfxV58SnJ/TgGRbQ6VFmYCqPpMRQ== X-Received: by 2002:a63:6bc1:0:b0:40d:ffa7:9dc3 with SMTP id g184-20020a636bc1000000b0040dffa79dc3mr35120392pgc.111.1658336607685; Wed, 20 Jul 2022 10:03:27 -0700 (PDT) Received: from bvanassche-linux.mtv.corp.google.com ([2620:15c:211:201:a7e0:78fc:9269:215b]) by smtp.gmail.com with ESMTPSA id u9-20020a170902bf4900b0016c37fe48casm13928330pls.193.2022.07.20.10.03.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Jul 2022 10:03:27 -0700 (PDT) From: Bart Van Assche To: "Martin K . Petersen" Cc: Jaegeuk Kim , linux-scsi@vger.kernel.org, Adrian Hunter , Bart Van Assche , Avri Altman , Bean Huo , Stanley Chu , "James E.J. Bottomley" , Matthias Brugger Subject: [PATCH] scsi: ufs: Increase the maximum data buffer size Date: Wed, 20 Jul 2022 10:03:18 -0700 Message-Id: <20220720170323.1599006-1-bvanassche@acm.org> X-Mailer: git-send-email 2.37.0.170.g444d1eabd0-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Measurements have shown that for some UFS devices the maximum sequential I/O throughput is achieved with a transfer size above 512 KiB. Hence increase the maximum size of the data buffer associated with a single request from SCSI_DEFAULT_MAX_SECTORS (1024) * 512 bytes = 512 KiB into 1 GiB. Note: the maximum data buffer size supported by the UFSHCI specification is 65535 * 256 MiB or about 16 TiB. Cc: Adrian Hunter Cc: Avri Altman Cc: Bean Huo Cc: Stanley Chu Signed-off-by: Bart Van Assche --- drivers/ufs/core/ufshcd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 36b7212e9cb5..ea7e8f329d0f 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -8365,6 +8365,7 @@ static struct scsi_host_template ufshcd_driver_template = { .cmd_per_lun = UFSHCD_CMD_PER_LUN, .can_queue = UFSHCD_CAN_QUEUE, .max_segment_size = PRDT_DATA_BYTE_COUNT_MAX, + .max_sectors = (1 << 30) / SECTOR_SIZE, /* 1 GiB */ .max_host_blocked = 1, .track_queue_depth = 1, .sdev_groups = ufshcd_driver_groups,