[src/trunk]: src/sys/external/bsd/drm2/include/drm drm: Teach bus_dma_hacks.h...

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

details:   https://anonhg.NetBSD.org/src/rev/5567784810f8
branches:  trunk
changeset: 368573:5567784810f8
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Tue Jul 19 23:19:44 2022 +0000

description:
drm: Teach bus_dma_hacks.h about alpha.

Not sure if this is correct!  Someone who knows alpha should vet.

diffstat:

 sys/external/bsd/drm2/include/drm/bus_dma_hacks.h |  9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diffs (30 lines):

diff -r 3743bcc676dc -r 5567784810f8 sys/external/bsd/drm2/include/drm/bus_dma_hacks.h
--- a/sys/external/bsd/drm2/include/drm/bus_dma_hacks.h Tue Jul 19 23:19:35 2022 +0000
+++ b/sys/external/bsd/drm2/include/drm/bus_dma_hacks.h Tue Jul 19 23:19:44 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bus_dma_hacks.h,v 1.24 2021/12/19 12:03:21 riastradh Exp $     */
+/*     $NetBSD: bus_dma_hacks.h,v 1.25 2022/07/19 23:19:44 riastradh Exp $     */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -85,6 +85,11 @@
 #  define      PHYS_TO_BUS_MEM(dmat, paddr)    ((bus_addr_t)(paddr))
 #  define      BUS_MEM_TO_PHYS(dmat, baddr)    ((paddr_t)(baddr))
 #elif defined(__powerpc__)
+#elif defined(__alpha__)
+#  define      PHYS_TO_BUS_MEM(dmat, paddr)                                  \
+       ((bus_addr_t)(paddr) | (dmat)->_wbase)
+#  define      BUS_MEM_TO_PHYS(dmat, baddr)                                  \
+       ((paddr_t)((baddr) & ~(bus_addr_t)(dmat)->_wbase))
 #else
 #  error DRM GEM/TTM need new MI bus_dma APIs!  Halp!
 #endif
@@ -117,6 +122,8 @@
        return dmat->_bounce_thresh && pa >= dmat->_bounce_thresh;
 #elif defined(__sparc__) || defined(__sparc64__)
        return false;           /* no bounce buffers ever */
+#elif defined(__alpha__)
+       return (dmat->_wsize == 0 ? false : pa >= dmat->_wsize);
 #endif
 }