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 gm200_ram_probe_fbp_amount(const struct nvkm_ram_func *func, u32 fbpao,
28 			   struct nvkm_device *device, int fbp, int *pltcs)
29 {
30 	u32 ltcs  = nvkm_rd32(device, 0x022450);
31 	u32 fbpas = nvkm_rd32(device, 0x022458);
32 	u32 fbpa  = fbp * fbpas;
33 	u32 size  = 0;
34 	if (!(nvkm_rd32(device, 0x021d38) & BIT(fbp))) {
35 		u32 ltco = nvkm_rd32(device, 0x021d70 + (fbp * 4));
36 		u32 ltcm = ~ltco & ((1 << ltcs) - 1);
37 
38 		while (fbpas--) {
39 			if (!(fbpao & (1 << fbpa)))
40 				size += func->probe_fbpa_amount(device, fbpa);
41 			fbpa++;
42 		}
43 
44 		*pltcs = hweight32(ltcm);
45 	}
46 	return size;
47 }
48 
49 static const struct nvkm_ram_func
50 gm200_ram = {
51 	.upper = 0x1000000000,
52 	.probe_fbp = gm107_ram_probe_fbp,
53 	.probe_fbp_amount = gm200_ram_probe_fbp_amount,
54 	.probe_fbpa_amount = gf100_ram_probe_fbpa_amount,
55 	.dtor = gk104_ram_dtor,
56 	.init = gk104_ram_init,
57 	.calc = gk104_ram_calc,
58 	.prog = gk104_ram_prog,
59 	.tidy = gk104_ram_tidy,
60 };
61 
62 int
63 gm200_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
64 {
65 	return gk104_ram_new_(&gm200_ram, fb, pram);
66 }
67