1 /* SPDX-License-Identifier: MIT
2 *
3 * Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
4 */
5 #include "priv.h"
6
7 #include <nvhw/drf.h>
8 #include <nvhw/ref/gh100/dev_fb.h>
9
10 static void
gh100_fb_sysmem_flush_page_init(struct nvkm_fb * fb)11 gh100_fb_sysmem_flush_page_init(struct nvkm_fb *fb)
12 {
13 const u64 addr = fb->sysmem.flush_page_addr >> NV_PFB_NISO_FLUSH_SYSMEM_ADDR_SHIFT;
14 struct nvkm_device *device = fb->subdev.device;
15
16 // Ensure that the address is within hardware limits
17 WARN_ON(fb->sysmem.flush_page_addr > DMA_BIT_MASK(52));
18
19 nvkm_wr32(device, NV_PFB_FBHUB_PCIE_FLUSH_SYSMEM_ADDR_HI, upper_32_bits(addr));
20 nvkm_wr32(device, NV_PFB_FBHUB_PCIE_FLUSH_SYSMEM_ADDR_LO, lower_32_bits(addr));
21 }
22
23 static const struct nvkm_fb_func
24 gh100_fb = {
25 .sysmem.flush_page_init = gh100_fb_sysmem_flush_page_init,
26 .vidmem.size = ga102_fb_vidmem_size,
27 };
28
29 int
gh100_fb_new(struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_fb ** pfb)30 gh100_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
31 {
32 return r535_fb_new(&gh100_fb, device, type, inst, pfb);
33 }
34