1/*	$NetBSD: nouveau_nvkm_subdev_bios_npde.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $	*/
2
3/*
4 * Copyright 2014 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 */
26#include <sys/cdefs.h>
27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_npde.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
28
29#include <subdev/bios.h>
30#include <subdev/bios/npde.h>
31#include <subdev/bios/pcir.h>
32
33u32
34nvbios_npdeTe(struct nvkm_bios *bios, u32 base)
35{
36	struct nvbios_pcirT pcir;
37	u8  ver; u16 hdr;
38	u32 data = nvbios_pcirTp(bios, base, &ver, &hdr, &pcir);
39	if (data = (data + hdr + 0x0f) & ~0x0f, data) {
40		switch (nvbios_rd32(bios, data + 0x00)) {
41		case 0x4544504e: /* NPDE */
42			break;
43		default:
44			nvkm_debug(&bios->subdev,
45				   "%08x: NPDE signature (%08x) unknown\n",
46				   data, nvbios_rd32(bios, data + 0x00));
47			data = 0;
48			break;
49		}
50	}
51	return data;
52}
53
54u32
55nvbios_npdeTp(struct nvkm_bios *bios, u32 base, struct nvbios_npdeT *info)
56{
57	u32 data = nvbios_npdeTe(bios, base);
58	memset(info, 0x00, sizeof(*info));
59	if (data) {
60		info->image_size = nvbios_rd16(bios, data + 0x08) * 512;
61		info->last = nvbios_rd08(bios, data + 0x0a) & 0x80;
62	}
63	return data;
64}
65