drm/nouveau/vfn: add stub subdev for dev_func

Initially for NV_USERMODE class, and Turing/Ampere's new interrupt tree.

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

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

 /* SPDX-License-Identifier: MIT */
+NVKM_LAYOUT_ONCE(NVKM_SUBDEV_VFN     , struct nvkm_vfn     ,      vfn)
 NVKM_LAYOUT_ONCE(NVKM_SUBDEV_PCI     , struct nvkm_pci     ,      pci)
 NVKM_LAYOUT_ONCE(NVKM_SUBDEV_VBIOS   , struct nvkm_bios    ,     bios)
 NVKM_LAYOUT_ONCE(NVKM_SUBDEV_DEVINIT , struct nvkm_devinit ,  devinit)

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

+/* SPDX-License-Identifier: MIT */
+#ifndef __NVKM_VFN_H__
+#define __NVKM_VFN_H__
+#include <core/subdev.h>
+
+struct nvkm_vfn {
+	const struct nvkm_vfn_func *func;
+	struct nvkm_subdev subdev;
+
+	struct {
+		u32 priv;
+	} addr;
+};
+
+int gv100_vfn_new(struct nvkm_device *, enum nvkm_subdev_type, int, struct nvkm_vfn **);
+int tu102_vfn_new(struct nvkm_device *, enum nvkm_subdev_type, int, struct nvkm_vfn **);
+int ga100_vfn_new(struct nvkm_device *, enum nvkm_subdev_type, int, struct nvkm_vfn **);
+#endif

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

@@ -2385,6 +2385,7 @@ nv140_chipset = {
 	.therm    = { 0x00000001, gp100_therm_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, gk104_top_new },
+	.vfn      = { 0x00000001, gv100_vfn_new },
 	.ce       = { 0x000001ff, gv100_ce_new },
 	.disp     = { 0x00000001, gv100_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
@@ -2419,6 +2420,7 @@ nv162_chipset = {
 	.therm    = { 0x00000001, gp100_therm_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, gk104_top_new },
+	.vfn      = { 0x00000001, tu102_vfn_new },
 	.ce       = { 0x0000001f, tu102_ce_new },
 	.disp     = { 0x00000001, tu102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
@@ -2453,6 +2455,7 @@ nv164_chipset = {
 	.therm    = { 0x00000001, gp100_therm_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, gk104_top_new },
+	.vfn      = { 0x00000001, tu102_vfn_new },
 	.ce       = { 0x0000001f, tu102_ce_new },
 	.disp     = { 0x00000001, tu102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
@@ -2487,6 +2490,7 @@ nv166_chipset = {
 	.therm    = { 0x00000001, gp100_therm_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, gk104_top_new },
+	.vfn      = { 0x00000001, tu102_vfn_new },
 	.ce       = { 0x0000001f, tu102_ce_new },
 	.disp     = { 0x00000001, tu102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
@@ -2521,6 +2525,7 @@ nv167_chipset = {
 	.therm    = { 0x00000001, gp100_therm_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, gk104_top_new },
+	.vfn      = { 0x00000001, tu102_vfn_new },
 	.ce       = { 0x0000001f, tu102_ce_new },
 	.disp     = { 0x00000001, tu102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
@@ -2555,6 +2560,7 @@ nv168_chipset = {
 	.therm    = { 0x00000001, gp100_therm_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, gk104_top_new },
+	.vfn      = { 0x00000001, tu102_vfn_new },
 	.ce       = { 0x0000001f, tu102_ce_new },
 	.disp     = { 0x00000001, tu102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
@@ -2581,6 +2587,7 @@ nv170_chipset = {
 	.privring = { 0x00000001, gm200_privring_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, ga100_top_new },
+	.vfn      = { 0x00000001, ga100_vfn_new },
 };
 
 static const struct nvkm_device_chip
@@ -2599,6 +2606,7 @@ nv172_chipset = {
 	.privring = { 0x00000001, gm200_privring_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, ga100_top_new },
+	.vfn      = { 0x00000001, ga100_vfn_new },
 	.disp     = { 0x00000001, ga102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },
@@ -2620,6 +2628,7 @@ nv173_chipset = {
 	.privring = { 0x00000001, gm200_privring_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, ga100_top_new },
+	.vfn      = { 0x00000001, ga100_vfn_new },
 	.disp     = { 0x00000001, ga102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },
@@ -2641,6 +2650,7 @@ nv174_chipset = {
 	.privring = { 0x00000001, gm200_privring_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, ga100_top_new },
+	.vfn      = { 0x00000001, ga100_vfn_new },
 	.disp     = { 0x00000001, ga102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },
@@ -2662,6 +2672,7 @@ nv176_chipset = {
 	.privring = { 0x00000001, gm200_privring_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, ga100_top_new },
+	.vfn      = { 0x00000001, ga100_vfn_new },
 	.disp     = { 0x00000001, ga102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },
@@ -2683,6 +2694,7 @@ nv177_chipset = {
 	.privring = { 0x00000001, gm200_privring_new },
 	.timer    = { 0x00000001, gk20a_timer_new },
 	.top      = { 0x00000001, ga100_top_new },
+	.vfn      = { 0x00000001, ga100_vfn_new },
 	.disp     = { 0x00000001, ga102_disp_new },
 	.dma      = { 0x00000001, gv100_dma_new },
 	.fifo     = { 0x00000001, ga102_fifo_new },

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

@@ -27,6 +27,7 @@
 #include <subdev/therm.h>
 #include <subdev/timer.h>
 #include <subdev/top.h>
+#include <subdev/vfn.h>
 #include <subdev/volt.h>
 
 #include <engine/bsp.h>

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

@@ -23,4 +23,5 @@ include $(src)/nvkm/subdev/privring/Kbuild
 include $(src)/nvkm/subdev/therm/Kbuild
 include $(src)/nvkm/subdev/timer/Kbuild
 include $(src)/nvkm/subdev/top/Kbuild
+include $(src)/nvkm/subdev/vfn/Kbuild
 include $(src)/nvkm/subdev/volt/Kbuild

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

+# SPDX-License-Identifier: MIT
+nvkm-y += nvkm/subdev/vfn/base.o
+nvkm-y += nvkm/subdev/vfn/gv100.o
+nvkm-y += nvkm/subdev/vfn/tu102.o
+nvkm-y += nvkm/subdev/vfn/ga100.o

drivers/gpu/drm/nouveau/nvkm/subdev/vfn/base.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 *
+nvkm_vfn_dtor(struct nvkm_subdev *subdev)
+{
+	return nvkm_vfn(subdev);
+}
+
+static const struct nvkm_subdev_func
+nvkm_vfn = {
+	.dtor = nvkm_vfn_dtor,
+};
+
+int
+nvkm_vfn_new_(const struct nvkm_vfn_func *func, struct nvkm_device *device,
+	      enum nvkm_subdev_type type, int inst, u32 addr, struct nvkm_vfn **pvfn)
+{
+	struct nvkm_vfn *vfn;
+
+	if (!(vfn = *pvfn = kzalloc(sizeof(*vfn), GFP_KERNEL)))
+		return -ENOMEM;
+
+	nvkm_subdev_ctor(&nvkm_vfn, device, type, inst, &vfn->subdev);
+	vfn->func = func;
+	vfn->addr.priv = addr;
+	return 0;
+}

drivers/gpu/drm/nouveau/nvkm/subdev/vfn/ga100.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 const struct nvkm_vfn_func
+ga100_vfn = {
+};
+
+int
+ga100_vfn_new(struct nvkm_device *device,
+	      enum nvkm_subdev_type type, int inst, struct nvkm_vfn **pvfn)
+{
+	return nvkm_vfn_new_(&ga100_vfn, device, type, inst, 0xb80000, pvfn);
+}

drivers/gpu/drm/nouveau/nvkm/subdev/vfn/gv100.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 const struct nvkm_vfn_func
+gv100_vfn = {
+};
+
+int
+gv100_vfn_new(struct nvkm_device *device,
+	      enum nvkm_subdev_type type, int inst, struct nvkm_vfn **pvfn)
+{
+	return nvkm_vfn_new_(&gv100_vfn, device, type, inst, 0, pvfn);
+}

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

+/* SPDX-License-Identifier: MIT */
+#ifndef __NVKM_VFN_PRIV_H__
+#define __NVKM_VFN_PRIV_H__
+#define nvkm_vfn(p) container_of((p), struct nvkm_vfn, subdev)
+#include <subdev/vfn.h>
+
+struct nvkm_vfn_func {
+};
+
+int nvkm_vfn_new_(const struct nvkm_vfn_func *, struct nvkm_device *, enum nvkm_subdev_type, int,
+		  u32 addr, struct nvkm_vfn **);
+#endif

drivers/gpu/drm/nouveau/nvkm/subdev/vfn/tu102.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 const struct nvkm_vfn_func
+tu102_vfn = {
+};
+
+int
+tu102_vfn_new(struct nvkm_device *device,
+	      enum nvkm_subdev_type type, int inst, struct nvkm_vfn **pvfn)
+{
+	return nvkm_vfn_new_(&tu102_vfn, device, type, inst, 0xb80000, pvfn);
+}