1 /* $NetBSD: nouveau_nvkm_subdev_fb_ramnv04.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $ */
2
3 /*
4 * Copyright 2013 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
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_fb_ramnv04.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $");
28
29 #include "ram.h"
30 #include "regsnv04.h"
31
32 const struct nvkm_ram_func
33 nv04_ram_func = {
34 };
35
36 int
nv04_ram_new(struct nvkm_fb * fb,struct nvkm_ram ** pram)37 nv04_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
38 {
39 struct nvkm_device *device = fb->subdev.device;
40 u32 boot0 = nvkm_rd32(device, NV04_PFB_BOOT_0);
41 u64 size;
42 enum nvkm_ram_type type;
43
44 if (boot0 & 0x00000100) {
45 size = ((boot0 >> 12) & 0xf) * 2 + 2;
46 size *= 1024 * 1024;
47 } else {
48 switch (boot0 & NV04_PFB_BOOT_0_RAM_AMOUNT) {
49 case NV04_PFB_BOOT_0_RAM_AMOUNT_32MB:
50 size = 32 * 1024 * 1024;
51 break;
52 case NV04_PFB_BOOT_0_RAM_AMOUNT_16MB:
53 size = 16 * 1024 * 1024;
54 break;
55 case NV04_PFB_BOOT_0_RAM_AMOUNT_8MB:
56 size = 8 * 1024 * 1024;
57 break;
58 case NV04_PFB_BOOT_0_RAM_AMOUNT_4MB:
59 size = 4 * 1024 * 1024;
60 break;
61 }
62 }
63
64 if ((boot0 & 0x00000038) <= 0x10)
65 type = NVKM_RAM_TYPE_SGRAM;
66 else
67 type = NVKM_RAM_TYPE_SDRAM;
68
69 return nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);
70 }
71