From patchwork Fri Mar 27 07:27:17 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: KY Srinivasan X-Patchwork-Id: 6103591 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 92BD2BF90F for ; Fri, 27 Mar 2015 06:11:02 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BBFCB203DB for ; Fri, 27 Mar 2015 06:11:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D669D203C3 for ; Fri, 27 Mar 2015 06:11:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752936AbbC0GKZ (ORCPT ); Fri, 27 Mar 2015 02:10:25 -0400 Received: from p3plsmtps2ded01.prod.phx3.secureserver.net ([208.109.80.58]:58722 "EHLO p3plsmtps2ded01.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751904AbbC0GKY (ORCPT ); Fri, 27 Mar 2015 02:10:24 -0400 Received: from linuxonhyperv.com ([72.167.245.219]) by p3plsmtps2ded01.prod.phx3.secureserver.net with : DED : id 8WAP1q00h4kklxU01WAPh5; Thu, 26 Mar 2015 23:10:23 -0700 x-originating-ip: 72.167.245.219 Received: by linuxonhyperv.com (Postfix, from userid 507) id DA466190A9E; Fri, 27 Mar 2015 00:27:21 -0700 (PDT) From: "K. Y. Srinivasan" To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, ohering@suse.com, jbottomley@parallels.com, hch@infradead.org, linux-scsi@vger.kernel.org, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com Cc: "K. Y. Srinivasan" Subject: [PATCH V2 4/7] scsi: storvsc: Retrieve information about the capability of the target Date: Fri, 27 Mar 2015 00:27:17 -0700 Message-Id: <1427441240-29314-4-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1427441240-29314-1-git-send-email-kys@microsoft.com> References: <1427441219-29275-1-git-send-email-kys@microsoft.com> <1427441240-29314-1-git-send-email-kys@microsoft.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The storage protocol informs the guest of the I/O capabilities of the storage stack. Retrieve this information and use it in the guest. Signed-off-by: K. Y. Srinivasan Reviewed-by: Long Li --- drivers/scsi/storvsc_drv.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 0ba7f2c..cdf048b 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -377,6 +377,10 @@ struct storvsc_device { unsigned char path_id; unsigned char target_id; + /* + * Max I/O, the device can support. + */ + u32 max_transfer_bytes; /* Used for vsc/vsp channel reset process */ struct storvsc_cmd_request init_request; struct storvsc_cmd_request reset_request; @@ -974,6 +978,8 @@ static int storvsc_channel_init(struct hv_device *device) STORAGE_CHANNEL_SUPPORTS_MULTI_CHANNEL) process_sub_channels = true; } + stor_device->max_transfer_bytes = + vstor_packet->storage_channel_properties.max_transfer_bytes; memset(vstor_packet, 0, sizeof(struct vstor_packet)); vstor_packet->operation = VSTOR_OPERATION_END_INITIALIZATION;