drm/nouveau/fifo: allow direct access to channel control registers where possible
The indirect method has been left in-place here as a fallback path, as
it may not be possible to map the non-PAGE_SIZE aligned control areas
across some chipset+interface combinations.
This isn't a problem for the primary use-case where the core and drm
are linked together in kernel-land, but across a VM or (in the case
where it applies now) between the core in the kernel and a userspace
test tool.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
index c4a1e11..f76ed10 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
@@ -302,6 +302,7 @@
.dtor = _nouveau_fifo_channel_dtor,
.init = nvc0_fifo_chan_init,
.fini = nvc0_fifo_chan_fini,
+ .map = _nouveau_fifo_channel_map,
.rd32 = _nouveau_fifo_channel_rd32,
.wr32 = _nouveau_fifo_channel_wr32,
};