svn commit: r245343 - projects/altix2/sys/dev/isp

[Marcel Moolenaar]

Author: marcel
Date: Sat Jan 12 22:00:35 2013
New Revision: 245343
URL: http://svnweb.freebsd.org/changeset/base/245343

Log:
  Slightly optimize the request and response queue synchronization. We
  have a single map that's used for both and we only need to synchronize
  1 request and 1 rsponse. Avoid using busdma_sync with post R/W that
  may force a platform to synchronize 80KB worth of cache and instead use
  busdma_sync_range twice: once for the request with post write (64B) and
  once for the response with post read (64B).

Modified:
  projects/altix2/sys/dev/isp/isp_freebsd.h

Modified: projects/altix2/sys/dev/isp/isp_freebsd.h
==============================================================================
--- projects/altix2/sys/dev/isp/isp_freebsd.h	Sat Jan 12 21:52:04 2013	(r245342)
+++ projects/altix2/sys/dev/isp/isp_freebsd.h	Sat Jan 12 22:00:35 2013	(r245343)
@@ -431,8 +431,10 @@ case SYNC_SFORDEV:						\
 	break;							\
 }								\
 case SYNC_REQUEST:						\
-	busdma_sync(isp->isp_osinfo.cdmd,			\
-	   BUSDMA_SYNC_PREREAD | BUSDMA_SYNC_PREWRITE);		\
+	busdma_sync_range(isp->isp_osinfo.cdmd, BUSDMA_SYNC_PREWRITE,	\
+	    isp->isp_rquest_dma + (offset * size), size);	\
+	busdma_sync_range(isp->isp_osinfo.cdmd, BUSDMA_SYNC_PREREAD,	\
+	    isp->isp_result_dma + (offset * size), size);	\
 	break;							\
 case SYNC_SFORCPU:						\
 {								\
@@ -441,8 +443,10 @@ case SYNC_SFORCPU:						\
 	break;							\
 }								\
 case SYNC_RESULT:						\
-	busdma_sync(isp->isp_osinfo.cdmd,			\
-	   BUSDMA_SYNC_POSTREAD | BUSDMA_SYNC_POSTWRITE);	\
+	busdma_sync_range(isp->isp_osinfo.cdmd, BUSDMA_SYNC_POSTWRITE,	\
+	    isp->isp_rquest_dma + (offset * size), size);	\
+	busdma_sync_range(isp->isp_osinfo.cdmd, BUSDMA_SYNC_POSTREAD,	\
+	    isp->isp_result_dma + (offset * size), size);	\
 	break;							\
 case SYNC_REG:							\
 	bus_space_barrier(isp->isp_osinfo.bus_tag,		\