drm/nouveau: Allocate a per-channel instance of NV_SW.
It will be useful for various synchronization purposes, mostly stolen
from "[PATCH] drm/nv50: synchronize user channel after buffer object
move on kernel channel" by Maarten Maathuis.
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
diff --git a/drivers/gpu/drm/nouveau/nouveau_channel.c b/drivers/gpu/drm/nouveau/nouveau_channel.c
index 9aaa972..4f378b6 100644
--- a/drivers/gpu/drm/nouveau/nouveau_channel.c
+++ b/drivers/gpu/drm/nouveau/nouveau_channel.c
@@ -414,7 +414,9 @@
init->subchan[0].grclass = 0x0039;
else
init->subchan[0].grclass = 0x5039;
- init->nr_subchan = 1;
+ init->subchan[1].handle = NvSw;
+ init->subchan[1].grclass = NV_SW;
+ init->nr_subchan = 2;
/* Named memory object area */
ret = drm_gem_handle_create(file_priv, chan->notifier_bo->gem,