drm/nouveau/fifo: add chid allocator

We need to be able to allocate TSG IDs as well as channel IDs, also,
Ampere has per-runlist channel IDs.

- holds per-ID private data, which will be used for/to protect lookup
- holds an nvkm_event which will be used for events tied to IDs
- not used yet beyond setup, and switching use of "fifo->nr - 1" for
  channel ID mask to "chid->mask"

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h b/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h
index 2f2059c5d4c9..b688121f1a91 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h
@@ -37,6 +37,9 @@ struct nvkm_fifo {
 	const struct nvkm_fifo_func *func;
 	struct nvkm_engine engine;
 
+	struct nvkm_chid *chid;
+	struct nvkm_chid *cgid;
+
 	DECLARE_BITMAP(mask, NVKM_FIFO_CHID_NR);
 	int nr;
 	struct list_head chan;