[src/trunk]: src/sys/arch/arm/arm32 implement _bus_dmamap_load_raw, ok skrll@

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/04ba3501d48e
branches:  trunk
changeset: 811250:04ba3501d48e
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Oct 18 15:34:08 2015 +0000

description:
implement _bus_dmamap_load_raw, ok skrll@

diffstat:

 sys/arch/arm/arm32/bus_dma.c |  44 ++++++++++++++++++++++++++++++++++++++++----
 1 files changed, 40 insertions(+), 4 deletions(-)

diffs (67 lines):

diff -r c4afe79b6b58 -r 04ba3501d48e sys/arch/arm/arm32/bus_dma.c
--- a/sys/arch/arm/arm32/bus_dma.c      Sun Oct 18 15:14:50 2015 +0000
+++ b/sys/arch/arm/arm32/bus_dma.c      Sun Oct 18 15:34:08 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bus_dma.c,v 1.93 2015/08/24 04:51:18 matt Exp $        */
+/*     $NetBSD: bus_dma.c,v 1.94 2015/10/18 15:34:08 jmcneill Exp $    */
 
 /*-
  * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
 #include "opt_arm_bus_space.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.93 2015/08/24 04:51:18 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.94 2015/10/18 15:34:08 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -734,10 +734,46 @@
  */
 int
 _bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map,
-    bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags)
+    bus_dma_segment_t *segs, int nsegs, bus_size_t size0, int flags)
 {
 
-       panic("_bus_dmamap_load_raw: not implemented");
+       bus_size_t size;
+       int i, error = 0;
+
+       /*
+        * Make sure that on error conditions we return "no valid mappings."
+        */
+       map->dm_mapsize = 0;
+       map->dm_nsegs = 0;
+       KASSERT(map->dm_maxsegsz <= map->_dm_maxmaxsegsz);
+
+       if (size0 > map->_dm_size)
+               return EINVAL;
+
+       for (i = 0, size = size0; i < nsegs && size > 0; i++) {
+               bus_dma_segment_t *ds = &segs[i];
+               bus_size_t sgsize;
+
+               sgsize = MIN(ds->ds_len, size);
+               if (sgsize == 0)
+                       continue;
+               error = _bus_dmamap_load_paddr(t, map, ds->ds_addr,
+                   sgsize, false);
+               if (error != 0)
+                       break;
+               size -= sgsize;
+       }
+
+       if (error != 0) {
+               map->dm_mapsize = 0;
+               map->dm_nsegs = 0;
+               return error;
+       }
+
+       /* XXX TBD bounce */
+
+       map->dm_mapsize = size0;
+       return 0;
 }
 
 /*