From owner-svn-src-all@FreeBSD.ORG Thu Aug 15 16:41:27 2013 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id C6FBA87B; Thu, 15 Aug 2013 16:41:27 +0000 (UTC) (envelope-from ken@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id B01802BD2; Thu, 15 Aug 2013 16:41:27 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id r7FGfRAI012817; Thu, 15 Aug 2013 16:41:27 GMT (envelope-from ken@svn.freebsd.org) Received: (from ken@localhost) by svn.freebsd.org (8.14.7/8.14.5/Submit) id r7FGfRSc012816; Thu, 15 Aug 2013 16:41:27 GMT (envelope-from ken@svn.freebsd.org) Message-Id: <201308151641.r7FGfRSc012816@svn.freebsd.org> From: "Kenneth D. Merry" Date: Thu, 15 Aug 2013 16:41:27 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r254372 - head/sys/dev/isp X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Aug 2013 16:41:27 -0000 Author: ken Date: Thu Aug 15 16:41:27 2013 New Revision: 254372 URL: http://svnweb.freebsd.org/changeset/base/254372 Log: Export the maxio field in the CAM XPT_PATH_INQ CCB in the isp(4) driver. This tells consumers up the stack the maximum I/O size that the controller can handle. The I/O size is bounded by the number of scatter/gather segments the controller can handle and the page size. For an amd64 system, it works out to around 5MB. Reviewed by: mjacob MFC after: 3 days Sponsored by: Spectra Logic Modified: head/sys/dev/isp/isp_freebsd.c Modified: head/sys/dev/isp/isp_freebsd.c ============================================================================== --- head/sys/dev/isp/isp_freebsd.c Thu Aug 15 16:03:09 2013 (r254371) +++ head/sys/dev/isp/isp_freebsd.c Thu Aug 15 16:41:27 2013 (r254372) @@ -5445,6 +5445,11 @@ isp_action(struct cam_sim *sim, union cc cpi->max_target = ISP_MAX_TARGETS(isp) - 1; cpi->max_lun = ISP_MAX_LUNS(isp) - 1; cpi->bus_id = cam_sim_bus(sim); + if (isp->isp_osinfo.sixtyfourbit) + cpi->maxio = (ISP_NSEG64_MAX - 1) * PAGE_SIZE; + else + cpi->maxio = (ISP_NSEG_MAX - 1) * PAGE_SIZE; + bus = cam_sim_bus(xpt_path_sim(cpi->ccb_h.path)); if (IS_FC(isp)) { fcparam *fcp = FCPARAM(isp, bus);