Date: Tue, 27 Aug 2013 20:34:11 +0000 (UTC) From: "Kenneth D. Merry" <ken@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r254971 - stable/9/sys/dev/isp Message-ID: <201308272034.r7RKYBEI041223@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: ken Date: Tue Aug 27 20:34:11 2013 New Revision: 254971 URL: http://svnweb.freebsd.org/changeset/base/254971 Log: MFC 254372: 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 Sponsored by: Spectra Logic Modified: stable/9/sys/dev/isp/isp_freebsd.c Modified: stable/9/sys/dev/isp/isp_freebsd.c ============================================================================== --- stable/9/sys/dev/isp/isp_freebsd.c Tue Aug 27 19:47:03 2013 (r254970) +++ stable/9/sys/dev/isp/isp_freebsd.c Tue Aug 27 20:34:11 2013 (r254971) @@ -5447,6 +5447,11 @@ 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);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201308272034.r7RKYBEI041223>