[src/trunk]: src/sys/external/bsd/drm2/include/linux Add some reservation stubs.

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

details:   https://anonhg.NetBSD.org/src/rev/04f39dfdf95a
branches:  trunk
changeset: 992698:04f39dfdf95a
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 27 07:32:11 2018 +0000

description:
Add some reservation stubs.

diffstat:

 sys/external/bsd/drm2/include/linux/reservation.h |  27 ++++++++++++++++++++++-
 1 files changed, 26 insertions(+), 1 deletions(-)

diffs (54 lines):

diff -r 5697a1cc6139 -r 04f39dfdf95a sys/external/bsd/drm2/include/linux/reservation.h
--- a/sys/external/bsd/drm2/include/linux/reservation.h Mon Aug 27 07:32:00 2018 +0000
+++ b/sys/external/bsd/drm2/include/linux/reservation.h Mon Aug 27 07:32:11 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: reservation.h,v 1.1 2014/07/16 20:59:58 riastradh Exp $        */
+/*     $NetBSD: reservation.h,v 1.2 2018/08/27 07:32:11 riastradh Exp $        */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -32,14 +32,28 @@
 #ifndef _ASM_RESERVATION_H_
 #define _ASM_RESERVATION_H_
 
+#include <sys/atomic.h>
+
 #include <linux/ww_mutex.h>
 
+struct fence;
+
 extern struct ww_class reservation_ww_class;
 
 struct reservation_object {
        struct ww_mutex lock;
+
+       struct fence *robj_fence_excl;
 };
 
+#define        reservation_object_add_excl_fence       linux_reservation_object_add_excl_fence
+#define        reservation_object_add_shared_fence     linux_reservation_object_add_shared_fence
+
+void   reservation_object_add_excl_fence(struct reservation_object *,
+           struct fence *);
+void   reservation_object_add_shared_fence(struct reservation_object *,
+           struct fence *);
+
 static inline void
 reservation_object_init(struct reservation_object *reservation)
 {
@@ -54,4 +68,15 @@
        ww_mutex_destroy(&reservation->lock);
 }
 
+static inline struct fence *
+reservation_object_get_excl(struct reservation_object *reservation)
+{
+       struct fence *fence;
+
+       fence = reservation->robj_fence_excl;
+       membar_datadep_consumer();
+
+       return fence;
+}
+
 #endif  /* _ASM_RESERVATION_H_ */