drm/nouveau/ltc/ga102: initial support

v2. fixup for ga103 early merge
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

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

@@ -4,7 +4,7 @@
 #include <core/subdev.h>
 #include <core/mm.h>
 
-#define NVKM_LTC_MAX_ZBC_COLOR_CNT 16
+#define NVKM_LTC_MAX_ZBC_COLOR_CNT 32
 #define NVKM_LTC_MAX_ZBC_DEPTH_CNT 16
 
 struct nvkm_ltc {
@@ -44,4 +44,5 @@ int gm200_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct
 int gp100_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
 int gp102_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
 int gp10b_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
+int ga102_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
 #endif

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

@@ -2606,6 +2606,7 @@ nv172_chipset = {
 	.gsp      = { 0x00000001, ga102_gsp_new },
 	.i2c      = { 0x00000001, gm200_i2c_new },
 	.imem     = { 0x00000001, nv50_instmem_new },
+	.ltc      = { 0x00000001, ga102_ltc_new },
 	.mc       = { 0x00000001, ga100_mc_new },
 	.mmu      = { 0x00000001, tu102_mmu_new },
 	.pci      = { 0x00000001, gp100_pci_new },
@@ -2634,6 +2635,7 @@ nv173_chipset = {
 	.gsp      = { 0x00000001, ga102_gsp_new },
 	.i2c      = { 0x00000001, gm200_i2c_new },
 	.imem     = { 0x00000001, nv50_instmem_new },
+	.ltc      = { 0x00000001, ga102_ltc_new },
 	.mc       = { 0x00000001, ga100_mc_new },
 	.mmu      = { 0x00000001, tu102_mmu_new },
 	.pci      = { 0x00000001, gp100_pci_new },
@@ -2662,6 +2664,7 @@ nv174_chipset = {
 	.gsp      = { 0x00000001, ga102_gsp_new },
 	.i2c      = { 0x00000001, gm200_i2c_new },
 	.imem     = { 0x00000001, nv50_instmem_new },
+	.ltc      = { 0x00000001, ga102_ltc_new },
 	.mc       = { 0x00000001, ga100_mc_new },
 	.mmu      = { 0x00000001, tu102_mmu_new },
 	.pci      = { 0x00000001, gp100_pci_new },
@@ -2690,6 +2693,7 @@ nv176_chipset = {
 	.gsp      = { 0x00000001, ga102_gsp_new },
 	.i2c      = { 0x00000001, gm200_i2c_new },
 	.imem     = { 0x00000001, nv50_instmem_new },
+	.ltc      = { 0x00000001, ga102_ltc_new },
 	.mc       = { 0x00000001, ga100_mc_new },
 	.mmu      = { 0x00000001, tu102_mmu_new },
 	.pci      = { 0x00000001, gp100_pci_new },
@@ -2718,6 +2722,7 @@ nv177_chipset = {
 	.gsp      = { 0x00000001, ga102_gsp_new },
 	.i2c      = { 0x00000001, gm200_i2c_new },
 	.imem     = { 0x00000001, nv50_instmem_new },
+	.ltc      = { 0x00000001, ga102_ltc_new },
 	.mc       = { 0x00000001, ga100_mc_new },
 	.mmu      = { 0x00000001, tu102_mmu_new },
 	.pci      = { 0x00000001, gp100_pci_new },

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

@@ -7,3 +7,4 @@ nvkm-y += nvkm/subdev/ltc/gm200.o
 nvkm-y += nvkm/subdev/ltc/gp100.o
 nvkm-y += nvkm/subdev/ltc/gp102.o
 nvkm-y += nvkm/subdev/ltc/gp10b.o
+nvkm-y += nvkm/subdev/ltc/ga102.o

drivers/gpu/drm/nouveau/nvkm/subdev/ltc/ga102.c

+/*
+ * Copyright 2021 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.
+ */
+#include "priv.h"
+
+static void
+ga102_ltc_zbc_clear_color(struct nvkm_ltc *ltc, int i, const u32 color[4])
+{
+	struct nvkm_device *device = ltc->subdev.device;
+
+	nvkm_mask(device, 0x17e338, 0x0000001f, i);
+	nvkm_wr32(device, 0x17e33c, color[0]);
+	nvkm_wr32(device, 0x17e340, color[1]);
+	nvkm_wr32(device, 0x17e344, color[2]);
+	nvkm_wr32(device, 0x17e348, color[3]);
+}
+
+static const struct nvkm_ltc_func
+ga102_ltc = {
+	.oneinit = gp100_ltc_oneinit,
+	.init = gp100_ltc_init,
+	.intr = gp100_ltc_intr,
+	.cbc_clear = gm107_ltc_cbc_clear,
+	.cbc_wait = gm107_ltc_cbc_wait,
+	.zbc_color = 31,
+	.zbc_depth = 16,
+	.zbc_clear_color = ga102_ltc_zbc_clear_color,
+	.zbc_clear_depth = gm107_ltc_zbc_clear_depth,
+	.zbc_clear_stencil = gp102_ltc_zbc_clear_stencil,
+	.invalidate = gf100_ltc_invalidate,
+	.flush = gf100_ltc_flush,
+};
+
+int
+ga102_ltc_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+	      struct nvkm_ltc **pltc)
+{
+	return nvkm_ltc_new_(&ga102_ltc, device, type, inst, pltc);
+}