drm/nouveau/ce/r535: initial support

Adds support for allocating DMA_COPY classes from RM.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230918202149.4343-40-skeggsb@gmail.com

Author: Ben Skeggs

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

@@ -52,6 +52,8 @@ struct nvkm_chan *nvkm_chan_get_chid(struct nvkm_engine *, int id, unsigned long
 struct nvkm_chan *nvkm_chan_get_inst(struct nvkm_engine *, u64 inst, unsigned long *irqflags);
 void nvkm_chan_put(struct nvkm_chan **, unsigned long irqflags);
 
+struct nvkm_chan *nvkm_uchan_chan(struct nvkm_object *);
+
 struct nvkm_fifo {
 	const struct nvkm_fifo_func *func;
 	struct nvkm_engine engine;

drivers/gpu/drm/nouveau/include/nvrm/535.54.03/common/sdk/nvidia/inc/class/clc0b5sw.h

@@ -0,0 +1,34 @@
+#ifndef __src_common_sdk_nvidia_inc_class_clc0b5sw_h__
+#define __src_common_sdk_nvidia_inc_class_clc0b5sw_h__
+
+/* Excerpt of RM headers from https://github.com/NVIDIA/open-gpu-kernel-modules/tree/535.54.03 */
+
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2014-2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-License-Identifier: MIT
+ *
+ * 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.
+ */
+
+typedef struct NVC0B5_ALLOCATION_PARAMETERS {
+    NvU32 version;
+    NvU32 engineType;
+} NVC0B5_ALLOCATION_PARAMETERS;
+
+#endif

drivers/gpu/drm/nouveau/include/nvrm/535.54.03/nvidia/inc/kernel/gpu/intr/engine_idx.h

@@ -28,6 +28,10 @@
 
 #define MC_ENGINE_IDX_DISP                          2
 
+#define MC_ENGINE_IDX_CE0                           15
+
+#define MC_ENGINE_IDX_CE9                           24
+
 #define MC_ENGINE_IDX_GSP                           49
 
 #endif

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

@@ -10,3 +10,5 @@ nvkm-y += nvkm/engine/ce/gv100.o
 nvkm-y += nvkm/engine/ce/tu102.o
 nvkm-y += nvkm/engine/ce/ga100.o
 nvkm-y += nvkm/engine/ce/ga102.o
+
+nvkm-y += nvkm/engine/ce/r535.o

drivers/gpu/drm/nouveau/nvkm/engine/ce/ga100.c

@@ -90,7 +90,7 @@ ga100_ce_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 	     struct nvkm_engine **pengine)
 {
 	if (nvkm_gsp_rm(device->gsp))
-		return -ENODEV;
+		return r535_ce_new(&ga100_ce, device, type, inst, pengine);
 
 	return nvkm_engine_new_(&ga100_ce, device, type, inst, true, pengine);
 }

drivers/gpu/drm/nouveau/nvkm/engine/ce/ga102.c

@@ -44,7 +44,7 @@ ga102_ce_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 	     struct nvkm_engine **pengine)
 {
 	if (nvkm_gsp_rm(device->gsp))
-		return -ENODEV;
+		return r535_ce_new(&ga102_ce, device, type, inst, pengine);
 
 	return nvkm_engine_new_(&ga102_ce, device, type, inst, true, pengine);
 }

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

@@ -3,6 +3,9 @@
 #define __NVKM_CE_PRIV_H__
 #include <engine/ce.h>
 
+int r535_ce_new(const struct nvkm_engine_func *, struct nvkm_device *,
+		enum nvkm_subdev_type, int, struct nvkm_engine **);
+
 void gt215_ce_intr(struct nvkm_falcon *, struct nvkm_chan *);
 void gk104_ce_intr(struct nvkm_engine *);
 void gp100_ce_intr(struct nvkm_engine *);

drivers/gpu/drm/nouveau/nvkm/engine/ce/r535.c

@@ -0,0 +1,108 @@
+/*
+ * Copyright 2023 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"
+
+#include <core/object.h>
+#include <subdev/gsp.h>
+#include <engine/fifo.h>
+
+#include <nvrm/nvtypes.h>
+#include <nvrm/535.54.03/common/sdk/nvidia/inc/class/cl2080_notification.h>
+#include <nvrm/535.54.03/common/sdk/nvidia/inc/class/clc0b5sw.h>
+
+struct r535_ce_obj {
+	struct nvkm_object object;
+	struct nvkm_gsp_object rm;
+};
+
+static void *
+r535_ce_obj_dtor(struct nvkm_object *object)
+{
+	struct r535_ce_obj *obj = container_of(object, typeof(*obj), object);
+
+	nvkm_gsp_rm_free(&obj->rm);
+	return obj;
+}
+
+static const struct nvkm_object_func
+r535_ce_obj = {
+	.dtor = r535_ce_obj_dtor,
+};
+
+static int
+r535_ce_obj_ctor(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+		 struct nvkm_object **pobject)
+{
+	struct nvkm_chan *chan = nvkm_uchan_chan(oclass->parent);
+	struct r535_ce_obj *obj;
+	NVC0B5_ALLOCATION_PARAMETERS *args;
+
+	if (!(obj = kzalloc(sizeof(*obj), GFP_KERNEL)))
+		return -ENOMEM;
+
+	nvkm_object_ctor(&r535_ce_obj, oclass, &obj->object);
+	*pobject = &obj->object;
+
+	args = nvkm_gsp_rm_alloc_get(&chan->rm.object, oclass->handle, oclass->base.oclass,
+				     sizeof(*args), &obj->rm);
+	if (WARN_ON(IS_ERR(args)))
+		return PTR_ERR(args);
+
+	args->version = 1;
+	args->engineType = NV2080_ENGINE_TYPE_COPY0 + oclass->engine->subdev.inst;
+
+	return nvkm_gsp_rm_alloc_wr(&obj->rm, args);
+}
+
+static void *
+r535_ce_dtor(struct nvkm_engine *engine)
+{
+	kfree(engine->func);
+	return engine;
+}
+
+int
+r535_ce_new(const struct nvkm_engine_func *hw, struct nvkm_device *device,
+	    enum nvkm_subdev_type type, int inst, struct nvkm_engine **pengine)
+{
+	struct nvkm_engine_func *rm;
+	int nclass, ret;
+
+	for (nclass = 0; hw->sclass[nclass].oclass; nclass++);
+
+	if (!(rm = kzalloc(sizeof(*rm) + (nclass + 1) * sizeof(rm->sclass[0]), GFP_KERNEL)))
+		return -ENOMEM;
+
+	rm->dtor = r535_ce_dtor;
+	for (int i = 0; i < nclass; i++) {
+		rm->sclass[i].minver = hw->sclass[i].minver;
+		rm->sclass[i].maxver = hw->sclass[i].maxver;
+		rm->sclass[i].oclass = hw->sclass[i].oclass;
+		rm->sclass[i].ctor = r535_ce_obj_ctor;
+	}
+
+	ret = nvkm_engine_new_(rm, device, type, inst, true, pengine);
+	if (ret)
+		kfree(rm);
+
+	return ret;
+}

drivers/gpu/drm/nouveau/nvkm/engine/ce/tu102.c

@@ -40,7 +40,7 @@ tu102_ce_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 	     struct nvkm_engine **pengine)
 {
 	if (nvkm_gsp_rm(device->gsp))
-		return -ENODEV;
+		return r535_ce_new(&tu102_ce, device, type, inst, pengine);
 
 	return nvkm_engine_new_(&tu102_ce, device, type, inst, true, pengine);
 }

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

@@ -2758,6 +2758,7 @@ nv192_chipset = {
 	.pci      = { 0x00000001, gp100_pci_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.vfn      = { 0x00000001, ga100_vfn_new },
+	.ce       = { 0x0000001f, ga102_ce_new },
 	.disp     = { 0x00000001, ad102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },
@@ -2778,6 +2779,7 @@ nv193_chipset = {
 	.pci      = { 0x00000001, gp100_pci_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.vfn      = { 0x00000001, ga100_vfn_new },
+	.ce       = { 0x0000001f, ga102_ce_new },
 	.disp     = { 0x00000001, ad102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },
@@ -2798,6 +2800,7 @@ nv194_chipset = {
 	.pci      = { 0x00000001, gp100_pci_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.vfn      = { 0x00000001, ga100_vfn_new },
+	.ce       = { 0x0000001f, ga102_ce_new },
 	.disp     = { 0x00000001, ad102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },
@@ -2818,6 +2821,7 @@ nv196_chipset = {
 	.pci      = { 0x00000001, gp100_pci_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.vfn      = { 0x00000001, ga100_vfn_new },
+	.ce       = { 0x0000001f, ga102_ce_new },
 	.disp     = { 0x00000001, ad102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },
@@ -2838,6 +2842,7 @@ nv197_chipset = {
 	.pci      = { 0x00000001, gp100_pci_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.vfn      = { 0x00000001, ga100_vfn_new },
+	.ce       = { 0x0000001f, ga102_ce_new },
 	.disp     = { 0x00000001, ad102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },