svn commit: r228939 - head/sys/dev/mps

[Alexander Motin]

Author: mav
Date: Wed Dec 28 22:49:28 2011
New Revision: 228939
URL: http://svn.freebsd.org/changeset/base/228939

Log:
  Set maximum I/O size for mps(4) to MAXPHYS. Looking into the code, I see
  no reason why it should be limited to 64K of DFLTPHYS. DMA data tag is any
  way set to allow MAXPHYS, S/G lists (chain elements) are sufficient and
  overflows are also handled. On my tests even 1MB I/Os are working fine.
  
  Reviewed by:	ken@

Modified:
  head/sys/dev/mps/mps_sas.c

Modified: head/sys/dev/mps/mps_sas.c
==============================================================================
--- head/sys/dev/mps/mps_sas.c	Wed Dec 28 22:18:53 2011	(r228938)
+++ head/sys/dev/mps/mps_sas.c	Wed Dec 28 22:49:28 2011	(r228939)
@@ -937,6 +937,7 @@ mpssas_action(struct cam_sim *sim, union
 		cpi->transport_version = 0;
 		cpi->protocol = PROTO_SCSI;
 		cpi->protocol_version = SCSI_REV_SPC;
+		cpi->maxio = MAXPHYS;
 		cpi->ccb_h.status = CAM_REQ_CMP;
 		break;
 	}