1 /*
2  * Copyright 2017 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 <bskeggs@redhat.com>
23  */
24 #include "ram.h"
25 
26 u32
27 gf108_ram_probe_fbp_amount(const struct nvkm_ram_func *func, u32 fbpao,
28 			   struct nvkm_device *device, int fbp, int *pltcs)
29 {
30 	u32 fbpt  = nvkm_rd32(device, 0x022438);
31 	u32 fbpat = nvkm_rd32(device, 0x02243c);
32 	u32 fbpas = fbpat / fbpt;
33 	u32 fbpa  = fbp * fbpas;
34 	u32 size  = 0;
35 	while (fbpas--) {
36 		if (!(fbpao & BIT(fbpa)))
37 			size += func->probe_fbpa_amount(device, fbpa);
38 		fbpa++;
39 	}
40 	*pltcs = 1;
41 	return size;
42 }
43 
44 static const struct nvkm_ram_func
45 gf108_ram = {
46 	.upper = 0x0200000000,
47 	.probe_fbp = gf100_ram_probe_fbp,
48 	.probe_fbp_amount = gf108_ram_probe_fbp_amount,
49 	.probe_fbpa_amount = gf100_ram_probe_fbpa_amount,
50 	.init = gf100_ram_init,
51 	.calc = gf100_ram_calc,
52 	.prog = gf100_ram_prog,
53 	.tidy = gf100_ram_tidy,
54 };
55 
56 int
57 gf108_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
58 {
59 	return gf100_ram_new_(&gf108_ram, fb, pram);
60 }
61