gb100.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/gb100/dev_hshub_base.h>
 9
10static void
11gb100_fb_sysmem_flush_page_init(struct nvkm_fb *fb)
12{
13	const u32 addr_hi = upper_32_bits(fb->sysmem.flush_page_addr);
14	const u32 addr_lo = lower_32_bits(fb->sysmem.flush_page_addr);
15	const u32 hshub = DRF_LO(NV_PFB_HSHUB0);
16	struct nvkm_device *device = fb->subdev.device;
17
18	// Ensure that the address is within hardware limits
19	WARN_ON(fb->sysmem.flush_page_addr > DMA_BIT_MASK(52));
20
21	nvkm_wr32(device, hshub + NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_HI, addr_hi);
22	nvkm_wr32(device, hshub + NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_LO, addr_lo);
23	nvkm_wr32(device, hshub + NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_HI, addr_hi);
24	nvkm_wr32(device, hshub + NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_LO, addr_lo);
25}
26
27static const struct nvkm_fb_func
28gb100_fb = {
29	.sysmem.flush_page_init = gb100_fb_sysmem_flush_page_init,
30	.vidmem.size = ga102_fb_vidmem_size,
31};
32
33int
34gb100_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
35{
36	return r535_fb_new(&gb100_fb, device, type, inst, pfb);
37}