drm/nouveau/nvdec: add gp102 support

gp10x' secure boot requires a blob to be run on NVDEC. Expose the falcon
through a dummy device.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/core/device.h

@@ -155,7 +155,7 @@ struct nvkm_device {
 	struct nvkm_engine *msppp;
 	struct nvkm_engine *msvld;
 	struct nvkm_engine *nvenc[3];
-	struct nvkm_engine *nvdec;
+	struct nvkm_nvdec *nvdec;
 	struct nvkm_pm *pm;
 	struct nvkm_engine *sec;
 	struct nvkm_sw *sw;
@@ -225,7 +225,7 @@ struct nvkm_device_chip {
 	int (*msppp   )(struct nvkm_device *, int idx, struct nvkm_engine **);
 	int (*msvld   )(struct nvkm_device *, int idx, struct nvkm_engine **);
 	int (*nvenc[3])(struct nvkm_device *, int idx, struct nvkm_engine **);
-	int (*nvdec   )(struct nvkm_device *, int idx, struct nvkm_engine **);
+	int (*nvdec   )(struct nvkm_device *, int idx, struct nvkm_nvdec **);
 	int (*pm      )(struct nvkm_device *, int idx, struct nvkm_pm **);
 	int (*sec     )(struct nvkm_device *, int idx, struct nvkm_engine **);
 	int (*sw      )(struct nvkm_device *, int idx, struct nvkm_sw **);

drivers/gpu/drm/nouveau/include/nvkm/engine/nvdec.h

@@ -1,4 +1,12 @@
 #ifndef __NVKM_NVDEC_H__
 #define __NVKM_NVDEC_H__
+#define nvkm_nvdec(p) container_of((p), struct nvkm_nvdec, engine)
 #include <core/engine.h>
+
+struct nvkm_nvdec {
+	struct nvkm_engine engine;
+	struct nvkm_falcon *falcon;
+};
+
+int gp102_nvdec_new(struct nvkm_device *, int, struct nvkm_nvdec **);
 #endif

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

@@ -2362,7 +2362,7 @@ nvkm_device_engine(struct nvkm_device *device, int index)
 	_(NVENC0 , device->nvenc[0],  device->nvenc[0]);
 	_(NVENC1 , device->nvenc[1],  device->nvenc[1]);
 	_(NVENC2 , device->nvenc[2],  device->nvenc[2]);
-	_(NVDEC  , device->nvdec   ,  device->nvdec);
+	_(NVDEC  , device->nvdec   , &device->nvdec->engine);
 	_(PM     , device->pm      , &device->pm->engine);
 	_(SEC    , device->sec     ,  device->sec);
 	_(SW     , device->sw      , &device->sw->engine);

drivers/gpu/drm/nouveau/nvkm/engine/nvdec/Kbuild

@@ -1 +1,2 @@
-#nvkm-y += nvkm/engine/nvdec/base.o
+nvkm-y += nvkm/engine/nvdec/base.o
+nvkm-y += nvkm/engine/nvdec/gp102.o

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

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS 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"
+
+#include <engine/falcon.h>
+
+static int
+nvkm_nvdec_oneinit(struct nvkm_engine *engine)
+{
+	struct nvkm_nvdec *nvdec = nvkm_nvdec(engine);
+	return nvkm_falcon_v1_new(&nvdec->engine.subdev, "NVDEC", 0x84000,
+				  &nvdec->falcon);
+}
+
+static void *
+nvkm_nvdec_dtor(struct nvkm_engine *engine)
+{
+	struct nvkm_nvdec *nvdec = nvkm_nvdec(engine);
+	nvkm_falcon_del(&nvdec->falcon);
+	return nvdec;
+}
+
+static const struct nvkm_engine_func
+nvkm_nvdec = {
+	.dtor = nvkm_nvdec_dtor,
+	.oneinit = nvkm_nvdec_oneinit,
+};
+
+int
+nvkm_nvdec_new_(struct nvkm_device *device, int index,
+		struct nvkm_nvdec **pnvdec)
+{
+	struct nvkm_nvdec *nvdec;
+
+	if (!(nvdec = *pnvdec = kzalloc(sizeof(*nvdec), GFP_KERNEL)))
+		return -ENOMEM;
+
+	return nvkm_engine_ctor(&nvkm_nvdec, device, index, true,
+				&nvdec->engine);
+};

drivers/gpu/drm/nouveau/nvkm/engine/nvdec/gp102.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS 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"
+
+int
+gp102_nvdec_new(struct nvkm_device *device, int index,
+		struct nvkm_nvdec **pnvdec)
+{
+	return nvkm_nvdec_new_(device, index, pnvdec);
+}

drivers/gpu/drm/nouveau/nvkm/engine/nvdec/priv.h

@@ -0,0 +1,6 @@
+#ifndef __NVKM_NVDEC_PRIV_H__
+#define __NVKM_NVDEC_PRIV_H__
+#include <engine/nvdec.h>
+
+int nvkm_nvdec_new_(struct nvkm_device *, int, struct nvkm_nvdec **);
+#endif