1/*
2 * Copyright 2013 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
23 */
24#define mcp77_ram(p) container_of((p), struct mcp77_ram, base)
25#include "ram.h"
26
27struct mcp77_ram {
28	struct nvkm_ram base;
29	u64 poller_base;
30};
31
32static int
33mcp77_ram_init(struct nvkm_ram *base)
34{
35	struct mcp77_ram *ram = mcp77_ram(base);
36	struct nvkm_device *device = ram->base.fb->subdev.device;
37	u32 dniso  = ((ram->base.size - (ram->poller_base + 0x00)) >> 5) - 1;
38	u32 hostnb = ((ram->base.size - (ram->poller_base + 0x20)) >> 5) - 1;
39	u32 flush  = ((ram->base.size - (ram->poller_base + 0x40)) >> 5) - 1;
40
41	/* Enable NISO poller for various clients and set their associated
42	 * read address, only for MCP77/78 and MCP79/7A. (fd#25701)
43	 */
44	nvkm_wr32(device, 0x100c18, dniso);
45	nvkm_mask(device, 0x100c14, 0x00000000, 0x00000001);
46	nvkm_wr32(device, 0x100c1c, hostnb);
47	nvkm_mask(device, 0x100c14, 0x00000000, 0x00000002);
48	nvkm_wr32(device, 0x100c24, flush);
49	nvkm_mask(device, 0x100c14, 0x00000000, 0x00010000);
50	return 0;
51}
52
53static const struct nvkm_ram_func
54mcp77_ram_func = {
55	.init = mcp77_ram_init,
56	.get = nv50_ram_get,
57	.put = nv50_ram_put,
58};
59
60int
61mcp77_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
62{
63	struct nvkm_device *device = fb->subdev.device;
64	u32 rsvd_head = ( 256 * 1024); /* vga memory */
65	u32 rsvd_tail = (1024 * 1024) + 0x1000; /* vbios etc + poller mem */
66	u64 base = (u64)nvkm_rd32(device, 0x100e10) << 12;
67	u64 size = (u64)nvkm_rd32(device, 0x100e14) << 12;
68	struct mcp77_ram *ram;
69	int ret;
70
71	if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL)))
72		return -ENOMEM;
73	*pram = &ram->base;
74
75	ret = nvkm_ram_ctor(&mcp77_ram_func, fb, NVKM_RAM_TYPE_STOLEN,
76			    size, 0, &ram->base);
77	if (ret)
78		return ret;
79
80	ram->poller_base = size - rsvd_tail;
81	ram->base.stolen = base;
82	nvkm_mm_fini(&ram->base.vram);
83
84	return nvkm_mm_init(&ram->base.vram, rsvd_head >> NVKM_RAM_MM_SHIFT,
85			    (size - rsvd_head - rsvd_tail) >>
86			    NVKM_RAM_MM_SHIFT, 1);
87}
88