drm/nve0/fifo: initial implementation

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/Makefile

@@ -17,6 +17,7 @@ nouveau-y := nouveau_drv.o nouveau_state.o nouveau_channel.o nouveau_mem.o \
              nv04_fb.o nv10_fb.o nv20_fb.o nv30_fb.o nv40_fb.o \
              nv50_fb.o nvc0_fb.o \
              nv04_fifo.o nv10_fifo.o nv40_fifo.o nv50_fifo.o nvc0_fifo.o \
+             nve0_fifo.o \
              nv04_graph.o nv10_graph.o nv20_graph.o \
              nv40_graph.o nv50_graph.o nvc0_graph.o \
              nv40_grctx.o nv50_grctx.o nvc0_grctx.o \

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -70,7 +70,7 @@ struct nouveau_mem;
 
 #define MAX_NUM_DCB_ENTRIES 16
 
-#define NOUVEAU_MAX_CHANNEL_NR 128
+#define NOUVEAU_MAX_CHANNEL_NR 4096
 #define NOUVEAU_MAX_TILE_NR 15
 
 struct nouveau_mem {
@@ -1260,6 +1260,14 @@ extern void nvc0_fifo_destroy_context(struct nouveau_channel *);
 extern int  nvc0_fifo_load_context(struct nouveau_channel *);
 extern int  nvc0_fifo_unload_context(struct drm_device *);
 
+/* nve0_fifo.c */
+extern int  nve0_fifo_init(struct drm_device *);
+extern void nve0_fifo_takedown(struct drm_device *);
+extern int  nve0_fifo_channel_id(struct drm_device *);
+extern int  nve0_fifo_create_context(struct nouveau_channel *);
+extern void nve0_fifo_destroy_context(struct nouveau_channel *);
+extern int  nve0_fifo_unload_context(struct drm_device *);
+
 /* nv04_graph.c */
 extern int  nv04_graph_create(struct drm_device *);
 extern int  nv04_graph_object_new(struct nouveau_channel *, int, u32, u16);

drivers/gpu/drm/nouveau/nouveau_state.c

@@ -496,13 +496,17 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 		engine->timer.takedown		= nv04_timer_takedown;
 		engine->fb.init			= nvc0_fb_init;
 		engine->fb.takedown		= nvc0_fb_takedown;
-		engine->fifo.channels		= 0;
-		engine->fifo.init		= nouveau_stub_init;
-		engine->fifo.takedown		= nouveau_stub_takedown;
+		engine->fifo.channels		= 4096;
+		engine->fifo.init		= nve0_fifo_init;
+		engine->fifo.takedown		= nve0_fifo_takedown;
 		engine->fifo.disable		= nvc0_fifo_disable;
 		engine->fifo.enable		= nvc0_fifo_enable;
 		engine->fifo.reassign		= nvc0_fifo_reassign;
-		engine->fifo.unload_context	= nouveau_stub_init;
+		engine->fifo.channel_id		= nve0_fifo_channel_id;
+		engine->fifo.create_context	= nve0_fifo_create_context;
+		engine->fifo.destroy_context	= nve0_fifo_destroy_context;
+		engine->fifo.load_context	= nvc0_fifo_load_context;
+		engine->fifo.unload_context	= nve0_fifo_unload_context;
 		engine->display.early_init	= nouveau_stub_init;
 		engine->display.late_takedown	= nouveau_stub_takedown;
 		engine->display.create		= nvd0_display_create;