1 /* $NetBSD: nouveau_nvkm_subdev_fb_rammcp77.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_rammcp77.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $");
28
29 #define mcp77_ram(p) container_of((p), struct mcp77_ram, base)
30 #include "ram.h"
31
32 struct mcp77_ram {
33 struct nvkm_ram base;
34 u64 poller_base;
35 };
36
37 static int
mcp77_ram_init(struct nvkm_ram * base)38 mcp77_ram_init(struct nvkm_ram *base)
39 {
40 struct mcp77_ram *ram = mcp77_ram(base);
41 struct nvkm_device *device = ram->base.fb->subdev.device;
42 u32 dniso = ((ram->base.size - (ram->poller_base + 0x00)) >> 5) - 1;
43 u32 hostnb = ((ram->base.size - (ram->poller_base + 0x20)) >> 5) - 1;
44 u32 flush = ((ram->base.size - (ram->poller_base + 0x40)) >> 5) - 1;
45
46 /* Enable NISO poller for various clients and set their associated
47 * read address, only for MCP77/78 and MCP79/7A. (fd#27501)
48 */
49 nvkm_wr32(device, 0x100c18, dniso);
50 nvkm_mask(device, 0x100c14, 0x00000000, 0x00000001);
51 nvkm_wr32(device, 0x100c1c, hostnb);
52 nvkm_mask(device, 0x100c14, 0x00000000, 0x00000002);
53 nvkm_wr32(device, 0x100c24, flush);
54 nvkm_mask(device, 0x100c14, 0x00000000, 0x00010000);
55 return 0;
56 }
57
58 static const struct nvkm_ram_func
59 mcp77_ram_func = {
60 .init = mcp77_ram_init,
61 };
62
63 int
mcp77_ram_new(struct nvkm_fb * fb,struct nvkm_ram ** pram)64 mcp77_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
65 {
66 struct nvkm_device *device = fb->subdev.device;
67 u32 rsvd_head = ( 256 * 1024); /* vga memory */
68 u32 rsvd_tail = (1024 * 1024) + 0x1000; /* vbios etc + poller mem */
69 u64 base = (u64)nvkm_rd32(device, 0x100e10) << 12;
70 u64 size = (u64)nvkm_rd32(device, 0x100e14) << 12;
71 struct mcp77_ram *ram;
72 int ret;
73
74 if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL)))
75 return -ENOMEM;
76 *pram = &ram->base;
77
78 ret = nvkm_ram_ctor(&mcp77_ram_func, fb, NVKM_RAM_TYPE_STOLEN,
79 size, &ram->base);
80 if (ret)
81 return ret;
82
83 ram->poller_base = size - rsvd_tail;
84 ram->base.stolen = base;
85 nvkm_mm_fini(&ram->base.vram);
86
87 return nvkm_mm_init(&ram->base.vram, NVKM_RAM_MM_NORMAL,
88 rsvd_head >> NVKM_RAM_MM_SHIFT,
89 (size - rsvd_head - rsvd_tail) >>
90 NVKM_RAM_MM_SHIFT, 1);
91 }
92