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 
30 int
31 gp100_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 
74 static u32
75 gp100_ram_probe_fbpa(struct nvkm_device *device, int fbpa)
76 {
77 	return nvkm_rd32(device, 0x90020c + (fbpa * 0x4000));
78 }
79 
80 static const struct nvkm_ram_func
81 gp100_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 
89 int
90 gp100_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