1/*	$NetBSD: nouveau_nvkm_subdev_fb_ramgm200.c,v 1.2 2021/12/18 23:45:39 riastradh Exp $	*/
2
3/*
4 * Copyright 2017 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_fb_ramgm200.c,v 1.2 2021/12/18 23:45:39 riastradh Exp $");
28
29#include "ram.h"
30
31u32
32gm200_ram_probe_fbp_amount(const struct nvkm_ram_func *func, u32 fbpao,
33			   struct nvkm_device *device, int fbp, int *pltcs)
34{
35	u32 ltcs  = nvkm_rd32(device, 0x022450);
36	u32 fbpas = nvkm_rd32(device, 0x022458);
37	u32 fbpa  = fbp * fbpas;
38	u32 size  = 0;
39	if (!(nvkm_rd32(device, 0x021d38) & BIT(fbp))) {
40		u32 ltco = nvkm_rd32(device, 0x021d70 + (fbp * 4));
41		u32 ltcm = ~ltco & ((1 << ltcs) - 1);
42
43		while (fbpas--) {
44			if (!(fbpao & (1 << fbpa)))
45				size += func->probe_fbpa_amount(device, fbpa);
46			fbpa++;
47		}
48
49		*pltcs = hweight32(ltcm);
50	}
51	return size;
52}
53
54static const struct nvkm_ram_func
55gm200_ram = {
56	.upper = 0x1000000000ULL,
57	.probe_fbp = gm107_ram_probe_fbp,
58	.probe_fbp_amount = gm200_ram_probe_fbp_amount,
59	.probe_fbpa_amount = gf100_ram_probe_fbpa_amount,
60	.dtor = gk104_ram_dtor,
61	.init = gk104_ram_init,
62	.calc = gk104_ram_calc,
63	.prog = gk104_ram_prog,
64	.tidy = gk104_ram_tidy,
65};
66
67int
68gm200_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
69{
70	return gk104_ram_new_(&gm200_ram, fb, pram);
71}
72