drm/nouveau/pmu/gp102: initial implementation

GP102/GP104 require a harder reset of PMU prior to DEVINIT, or the IFR
image will hang.

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

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

@@ -36,6 +36,7 @@ int gk208_pmu_new(struct nvkm_device *, int, struct nvkm_pmu **);
 int gk20a_pmu_new(struct nvkm_device *, int, struct nvkm_pmu **);
 int gm107_pmu_new(struct nvkm_device *, int, struct nvkm_pmu **);
 int gp100_pmu_new(struct nvkm_device *, int, struct nvkm_pmu **);
+int gp102_pmu_new(struct nvkm_device *, int, struct nvkm_pmu **);
 
 /* interface to MEMX process running on PMU */
 struct nvkm_memx;

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

@@ -2200,6 +2200,7 @@ nv132_chipset = {
 	.mc = gp100_mc_new,
 	.mmu = gf100_mmu_new,
 	.pci = gp100_pci_new,
+	.pmu = gp102_pmu_new,
 	.timer = gk20a_timer_new,
 	.top = gk104_top_new,
 	.ce[0] = gp104_ce_new,
@@ -2228,6 +2229,7 @@ nv134_chipset = {
 	.mc = gp100_mc_new,
 	.mmu = gf100_mmu_new,
 	.pci = gp100_pci_new,
+	.pmu = gp102_pmu_new,
 	.timer = gk20a_timer_new,
 	.top = gk104_top_new,
 	.ce[0] = gp104_ce_new,

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

@@ -9,3 +9,4 @@ nvkm-y += nvkm/subdev/pmu/gk208.o
 nvkm-y += nvkm/subdev/pmu/gk20a.o
 nvkm-y += nvkm/subdev/pmu/gm107.o
 nvkm-y += nvkm/subdev/pmu/gp100.o
+nvkm-y += nvkm/subdev/pmu/gp102.o

drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gp102.c

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2016 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"
+
+static void
+gp102_pmu_reset(struct nvkm_pmu *pmu)
+{
+	struct nvkm_device *device = pmu->subdev.device;
+	nvkm_mask(device, 0x10a3c0, 0x00000001, 0x00000001);
+	nvkm_mask(device, 0x10a3c0, 0x00000001, 0x00000000);
+}
+
+static const struct nvkm_pmu_func
+gp102_pmu = {
+	.reset = gp102_pmu_reset,
+};
+
+int
+gp102_pmu_new(struct nvkm_device *device, int index, struct nvkm_pmu **ppmu)
+{
+	return nvkm_pmu_new_(&gp102_pmu, device, index, ppmu);
+}