drm/nouveau/vfn/tu102-: prepare for GSP-RM

- add R535 implementation of VFN, minus interrupt table
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230918202149.4343-23-skeggsb@gmail.com

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

@@ -4,3 +4,5 @@ nvkm-y += nvkm/subdev/vfn/uvfn.o
 nvkm-y += nvkm/subdev/vfn/gv100.o
 nvkm-y += nvkm/subdev/vfn/tu102.o
 nvkm-y += nvkm/subdev/vfn/ga100.o
+
+nvkm-y += nvkm/subdev/vfn/r535.o

drivers/gpu/drm/nouveau/nvkm/subdev/vfn/ga100.c

@@ -21,6 +21,8 @@
  */
 #include "priv.h"
 
+#include <subdev/gsp.h>
+
 #include <nvif/class.h>
 
 static const struct nvkm_intr_data
@@ -43,5 +45,8 @@ int
 ga100_vfn_new(struct nvkm_device *device,
 	      enum nvkm_subdev_type type, int inst, struct nvkm_vfn **pvfn)
 {
+	if (nvkm_gsp_rm(device->gsp))
+		return r535_vfn_new(&ga100_vfn, device, type, inst, 0xb80000, pvfn);
+
 	return nvkm_vfn_new_(&ga100_vfn, device, type, inst, 0xb80000, pvfn);
 }

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

@@ -5,16 +5,21 @@
 #include <subdev/vfn.h>
 
 struct nvkm_vfn_func {
+	void (*dtor)(struct nvkm_vfn *);
+
 	const struct nvkm_intr_func *intr;
 	const struct nvkm_intr_data *intrs;
 
 	struct {
 		u32 addr;
 		u32 size;
-		const struct nvkm_sclass base;
+		struct nvkm_sclass base;
 	} user;
 };
 
+int r535_vfn_new(const struct nvkm_vfn_func *hw, struct nvkm_device *, enum nvkm_subdev_type, int,
+		 u32 addr, struct nvkm_vfn **);
+
 int nvkm_vfn_new_(const struct nvkm_vfn_func *, struct nvkm_device *, enum nvkm_subdev_type, int,
 		  u32 addr, struct nvkm_vfn **);
 

drivers/gpu/drm/nouveau/nvkm/subdev/vfn/r535.c

+/*
+ * 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"
+
+static void
+r535_vfn_dtor(struct nvkm_vfn *vfn)
+{
+	kfree(vfn->func);
+}
+
+int
+r535_vfn_new(const struct nvkm_vfn_func *hw,
+	     struct nvkm_device *device, enum nvkm_subdev_type type, int inst, u32 addr,
+	     struct nvkm_vfn **pvfn)
+{
+	struct nvkm_vfn_func *rm;
+	int ret;
+
+	if (!(rm = kzalloc(sizeof(*rm), GFP_KERNEL)))
+		return -ENOMEM;
+
+	rm->dtor = r535_vfn_dtor;
+	rm->intr = hw->intr;
+	rm->user = hw->user;
+
+	ret = nvkm_vfn_new_(rm, device, type, inst, addr, pvfn);
+	if (ret)
+		kfree(rm);
+
+	return ret;
+}

drivers/gpu/drm/nouveau/nvkm/subdev/vfn/tu102.c

@@ -21,6 +21,8 @@
  */
 #include "priv.h"
 
+#include <subdev/gsp.h>
+
 #include <nvif/class.h>
 
 static void
@@ -104,5 +106,8 @@ int
 tu102_vfn_new(struct nvkm_device *device,
 	      enum nvkm_subdev_type type, int inst, struct nvkm_vfn **pvfn)
 {
+	if (nvkm_gsp_rm(device->gsp))
+		return r535_vfn_new(&tu102_vfn, device, type, inst, 0xb80000, pvfn);
+
 	return nvkm_vfn_new_(&tu102_vfn, device, type, inst, 0xb80000, pvfn);
 }