1/*
2 * Copyright 2013 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 */
24#include "ram.h"
25
26#include <subdev/bios.h>
27#include <subdev/bios/init.h>
28#include <subdev/bios/rammap.h>
29
30static int
31gp100_ram_init(struct nvkm_ram *ram)
32{
33	struct nvkm_subdev *subdev = &ram->fb->subdev;
34	struct nvkm_device *device = subdev->device;
35	struct nvkm_bios *bios = device->bios;
36	u8  ver, hdr, cnt, len, snr, ssz;
37	u32 data;
38	int i;
39
40	/* run a bunch of tables from rammap table.  there's actually
41	 * individual pointers for each rammap entry too, but, nvidia
42	 * seem to just run the last two entries' scripts early on in
43	 * their init, and never again.. we'll just run 'em all once
44	 * for now.
45	 *
46	 * i strongly suspect that each script is for a separate mode
47	 * (likely selected by 0x9a065c's lower bits?), and the
48	 * binary driver skips the one that's already been setup by
49	 * the init tables.
50	 */
51	data = nvbios_rammapTe(bios, &ver, &hdr, &cnt, &len, &snr, &ssz);
52	if (!data || hdr < 0x15)
53		return -EINVAL;
54
55	cnt  = nvbios_rd08(bios, data + 0x14); /* guess at count */
56	data = nvbios_rd32(bios, data + 0x10); /* guess u32... */
57	if (cnt) {
58		u32 save = nvkm_rd32(device, 0x9a065c) & 0x000000f0;
59		for (i = 0; i < cnt; i++, data += 4) {
60			if (i != save >> 4) {
61				nvkm_mask(device, 0x9a065c, 0x000000f0, i << 4);
62				nvbios_init(subdev, nvbios_rd32(bios, data));
63			}
64		}
65		nvkm_mask(device, 0x9a065c, 0x000000f0, save);
66	}
67
68	nvkm_mask(device, 0x9a0584, 0x11000000, 0x00000000);
69	nvkm_wr32(device, 0x10ecc0, 0xffffffff);
70	nvkm_mask(device, 0x9a0160, 0x00000010, 0x00000010);
71	return 0;
72}
73
74static u32
75gp100_ram_probe_fbpa(struct nvkm_device *device, int fbpa)
76{
77	return nvkm_rd32(device, 0x90020c + (fbpa * 0x4000));
78}
79
80static const struct nvkm_ram_func
81gp100_ram = {
82	.upper = 0x1000000000ULL,
83	.probe_fbp = gm107_ram_probe_fbp,
84	.probe_fbp_amount = gm200_ram_probe_fbp_amount,
85	.probe_fbpa_amount = gp100_ram_probe_fbpa,
86	.init = gp100_ram_init,
87};
88
89int
90gp100_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
91{
92	struct nvkm_ram *ram;
93
94	if (!(ram = *pram = kzalloc(sizeof(*ram), GFP_KERNEL)))
95		return -ENOMEM;
96
97	return gf100_ram_ctor(&gp100_ram, fb, ram);
98
99}
100