gh100.c

 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
10static void
11gh100_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
23static const struct nvkm_fb_func
24gh100_fb = {
25	.sysmem.flush_page_init = gh100_fb_sysmem_flush_page_init,
26	.vidmem.size = ga102_fb_vidmem_size,
27};
28
29int
30gh100_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}