drm/nouveau/ltc/gm204: split implementation from gm107

Differences from GM10x:
- GM20x LTC count detection differs from GM10x
- GM20x init doesn't require large page size setting
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/subdev/ltc.h

@@ -37,4 +37,5 @@ int gf100_ltc_new(struct nvkm_device *, int, struct nvkm_ltc **);
 int gk104_ltc_new(struct nvkm_device *, int, struct nvkm_ltc **);
 int gk20a_ltc_new(struct nvkm_device *, int, struct nvkm_ltc **);
 int gm107_ltc_new(struct nvkm_device *, int, struct nvkm_ltc **);
+int gm204_ltc_new(struct nvkm_device *, int, struct nvkm_ltc **);
 #endif

drivers/gpu/drm/nouveau/nvkm/engine/device/base.c

@@ -1975,7 +1975,7 @@ nv124_chipset = {
 	.i2c = gm204_i2c_new,
 	.ibus = gm204_ibus_new,
 	.imem = nv50_instmem_new,
-	.ltc = gm107_ltc_new,
+	.ltc = gm204_ltc_new,
 	.mc = gk20a_mc_new,
 	.mmu = gf100_mmu_new,
 	.mxm = nv50_mxm_new,
@@ -2006,7 +2006,7 @@ nv126_chipset = {
 	.i2c = gm204_i2c_new,
 	.ibus = gm204_ibus_new,
 	.imem = nv50_instmem_new,
-	.ltc = gm107_ltc_new,
+	.ltc = gm204_ltc_new,
 	.mc = gk20a_mc_new,
 	.mmu = gf100_mmu_new,
 	.mxm = nv50_mxm_new,
@@ -2033,7 +2033,7 @@ nv12b_chipset = {
 	.fuse = gm107_fuse_new,
 	.ibus = gk20a_ibus_new,
 	.imem = gk20a_instmem_new,
-	.ltc = gm107_ltc_new,
+	.ltc = gm204_ltc_new,
 	.mc = gk20a_mc_new,
 	.mmu = gf100_mmu_new,
 	.timer = gk20a_timer_new,

drivers/gpu/drm/nouveau/nvkm/subdev/ltc/Kbuild

@@ -2,3 +2,4 @@ nvkm-y += nvkm/subdev/ltc/base.o
 nvkm-y += nvkm/subdev/ltc/gf100.o
 nvkm-y += nvkm/subdev/ltc/gk104.o
 nvkm-y += nvkm/subdev/ltc/gm107.o
+nvkm-y += nvkm/subdev/ltc/gm204.o

drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gm107.c

@@ -26,7 +26,7 @@
 #include <subdev/fb.h>
 #include <subdev/timer.h>
 
-static void
+void
 gm107_ltc_cbc_clear(struct nvkm_ltc *ltc, u32 start, u32 limit)
 {
 	struct nvkm_device *device = ltc->subdev.device;
@@ -35,7 +35,7 @@ gm107_ltc_cbc_clear(struct nvkm_ltc *ltc, u32 start, u32 limit)
 	nvkm_mask(device, 0x17e26c, 0x00000000, 0x00000004);
 }
 
-static void
+void
 gm107_ltc_cbc_wait(struct nvkm_ltc *ltc)
 {
 	struct nvkm_device *device = ltc->subdev.device;
@@ -51,7 +51,7 @@ gm107_ltc_cbc_wait(struct nvkm_ltc *ltc)
 	}
 }
 
-static void
+void
 gm107_ltc_zbc_clear_color(struct nvkm_ltc *ltc, int i, const u32 color[4])
 {
 	struct nvkm_device *device = ltc->subdev.device;
@@ -62,7 +62,7 @@ gm107_ltc_zbc_clear_color(struct nvkm_ltc *ltc, int i, const u32 color[4])
 	nvkm_wr32(device, 0x17e348, color[3]);
 }
 
-static void
+void
 gm107_ltc_zbc_clear_depth(struct nvkm_ltc *ltc, int i, const u32 depth)
 {
 	struct nvkm_device *device = ltc->subdev.device;
@@ -84,7 +84,7 @@ gm107_ltc_lts_isr(struct nvkm_ltc *ltc, int c, int s)
 	}
 }
 
-static void
+void
 gm107_ltc_intr(struct nvkm_ltc *ltc)
 {
 	struct nvkm_device *device = ltc->subdev.device;

drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gm204.c

+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "priv.h"
+
+#include <subdev/fb.h>
+#include <subdev/timer.h>
+
+static int
+gm204_ltc_oneinit(struct nvkm_ltc *ltc)
+{
+	struct nvkm_device *device = ltc->subdev.device;
+
+	ltc->ltc_nr = nvkm_rd32(device, 0x12006c);
+	ltc->lts_nr = nvkm_rd32(device, 0x17e280) >> 28;
+
+	return gf100_ltc_oneinit_tag_ram(ltc);
+}
+static void
+gm204_ltc_init(struct nvkm_ltc *ltc)
+{
+	nvkm_wr32(ltc->subdev.device, 0x17e278, ltc->tag_base);
+}
+
+static const struct nvkm_ltc_func
+gm204_ltc = {
+	.oneinit = gm204_ltc_oneinit,
+	.init = gm204_ltc_init,
+	.intr = gm107_ltc_intr, /*XXX: not validated */
+	.cbc_clear = gm107_ltc_cbc_clear,
+	.cbc_wait = gm107_ltc_cbc_wait,
+	.zbc = 16,
+	.zbc_clear_color = gm107_ltc_zbc_clear_color,
+	.zbc_clear_depth = gm107_ltc_zbc_clear_depth,
+	.invalidate = gf100_ltc_invalidate,
+	.flush = gf100_ltc_flush,
+};
+
+int
+gm204_ltc_new(struct nvkm_device *device, int index, struct nvkm_ltc **pltc)
+{
+	return nvkm_ltc_new_(&gm204_ltc, device, index, pltc);
+}

drivers/gpu/drm/nouveau/nvkm/subdev/ltc/priv.h

@@ -31,4 +31,10 @@ void gf100_ltc_zbc_clear_color(struct nvkm_ltc *, int, const u32[4]);
 void gf100_ltc_zbc_clear_depth(struct nvkm_ltc *, int, const u32);
 void gf100_ltc_invalidate(struct nvkm_ltc *);
 void gf100_ltc_flush(struct nvkm_ltc *);
+
+void gm107_ltc_intr(struct nvkm_ltc *);
+void gm107_ltc_cbc_clear(struct nvkm_ltc *, u32, u32);
+void gm107_ltc_cbc_wait(struct nvkm_ltc *);
+void gm107_ltc_zbc_clear_color(struct nvkm_ltc *, int, const u32[4]);
+void gm107_ltc_zbc_clear_depth(struct nvkm_ltc *, int, const u32);
 #endif