6 files changed, 100 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/Kbuild b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/Kbuild
index d1611ad3bf81..8d8a5382d1b1 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/Kbuild
@@ -35,6 +35,9 @@ nvkm-y += nvkm/subdev/fb/gv100.o
 nvkm-y += nvkm/subdev/fb/tu102.o
 nvkm-y += nvkm/subdev/fb/ga100.o
 nvkm-y += nvkm/subdev/fb/ga102.o
+nvkm-y += nvkm/subdev/fb/gh100.o
+nvkm-y += nvkm/subdev/fb/gb100.o
+nvkm-y += nvkm/subdev/fb/gb202.o
 
 nvkm-y += nvkm/subdev/fb/r535.o
 
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ga102.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ga102.c
index 25f82b372bca..2819780050d8 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ga102.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ga102.c
@@ -25,7 +25,7 @@
 #include <subdev/gsp.h>
 #include <engine/nvdec.h>
 
-static u64
+u64
 ga102_fb_vidmem_size(struct nvkm_fb *fb)
 {
 	return (u64)nvkm_rd32(fb->subdev.device, 0x1183a4) << 20;
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb100.c
new file mode 100644
index 000000000000..1c78c8853617
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb100.c
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
+ */
+#include "priv.h"
+
+#include <nvhw/drf.h>
+#include <nvhw/ref/gb100/dev_hshub_base.h>
+
+static void
+gb100_fb_sysmem_flush_page_init(struct nvkm_fb *fb)
+{
+	const u32 addr_hi = upper_32_bits(fb->sysmem.flush_page_addr);
+	const u32 addr_lo = lower_32_bits(fb->sysmem.flush_page_addr);
+	const u32 hshub = DRF_LO(NV_PFB_HSHUB0);
+	struct nvkm_device *device = fb->subdev.device;
+
+	nvkm_wr32(device, hshub + NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_HI, addr_hi);
+	nvkm_wr32(device, hshub + NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_LO, addr_lo);
+	nvkm_wr32(device, hshub + NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_HI, addr_hi);
+	nvkm_wr32(device, hshub + NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_LO, addr_lo);
+}
+
+static const struct nvkm_fb_func
+gb100_fb = {
+	.sysmem.flush_page_init = gb100_fb_sysmem_flush_page_init,
+	.vidmem.size = ga102_fb_vidmem_size,
+};
+
+int
+gb100_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
+{
+	return r535_fb_new(&gb100_fb, device, type, inst, pfb);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb202.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb202.c
new file mode 100644
index 000000000000..848505026d02
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb202.c
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
+ */
+#include "priv.h"
+
+#include <nvhw/drf.h>
+#include <nvhw/ref/gb10b/dev_fbhub.h>
+
+static void
+gb202_fb_sysmem_flush_page_init(struct nvkm_fb *fb)
+{
+	struct nvkm_device *device = fb->subdev.device;
+	const u64 addr = fb->sysmem.flush_page_addr;
+
+	nvkm_wr32(device, NV_PFB_FBHUB0_PCIE_FLUSH_SYSMEM_ADDR_HI, upper_32_bits(addr));
+	nvkm_wr32(device, NV_PFB_FBHUB0_PCIE_FLUSH_SYSMEM_ADDR_LO, lower_32_bits(addr));
+}
+
+static const struct nvkm_fb_func
+gb202_fb = {
+	.sysmem.flush_page_init = gb202_fb_sysmem_flush_page_init,
+	.vidmem.size = ga102_fb_vidmem_size,
+};
+
+int
+gb202_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
+{
+	return r535_fb_new(&gb202_fb, device, type, inst, pfb);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gh100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gh100.c
new file mode 100644
index 000000000000..2d8c51f882d5
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gh100.c
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
+ */
+#include "priv.h"
+
+#include <nvhw/drf.h>
+#include <nvhw/ref/gh100/dev_fb.h>
+
+static void
+gh100_fb_sysmem_flush_page_init(struct nvkm_fb *fb)
+{
+	const u64 addr = fb->sysmem.flush_page_addr >> NV_PFB_NISO_FLUSH_SYSMEM_ADDR_SHIFT;
+	struct nvkm_device *device = fb->subdev.device;
+
+	nvkm_wr32(device, NV_PFB_FBHUB_PCIE_FLUSH_SYSMEM_ADDR_HI, upper_32_bits(addr));
+	nvkm_wr32(device, NV_PFB_FBHUB_PCIE_FLUSH_SYSMEM_ADDR_LO, lower_32_bits(addr));
+}
+
+static const struct nvkm_fb_func
+gh100_fb = {
+	.sysmem.flush_page_init = gh100_fb_sysmem_flush_page_init,
+	.vidmem.size = ga102_fb_vidmem_size,
+};
+
+int
+gh100_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
+{
+	return r535_fb_new(&gh100_fb, device, type, inst, pfb);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/priv.h b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/priv.h
index 35c55dfba23d..ebe996503ab2 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/priv.h
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/priv.h
@@ -98,4 +98,6 @@ int gp102_fb_vpr_scrub(struct nvkm_fb *);
 int gv100_fb_init_page(struct nvkm_fb *);
 
 bool tu102_fb_vpr_scrub_required(struct nvkm_fb *);
+
+u64 ga102_fb_vidmem_size(struct nvkm_fb *);
 #endif