1/*
2 * Copyright 2012 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#include "priv.h"
25
26static void
27gf100_ibus_intr_hub(struct nvkm_subdev *ibus, int i)
28{
29	struct nvkm_device *device = ibus->device;
30	u32 addr = nvkm_rd32(device, 0x122120 + (i * 0x0400));
31	u32 data = nvkm_rd32(device, 0x122124 + (i * 0x0400));
32	u32 stat = nvkm_rd32(device, 0x122128 + (i * 0x0400));
33	nvkm_error(ibus, "HUB%d: %06x %08x (%08x)\n", i, addr, data, stat);
34	nvkm_mask(device, 0x122128 + (i * 0x0400), 0x00000200, 0x00000000);
35}
36
37static void
38gf100_ibus_intr_rop(struct nvkm_subdev *ibus, int i)
39{
40	struct nvkm_device *device = ibus->device;
41	u32 addr = nvkm_rd32(device, 0x124120 + (i * 0x0400));
42	u32 data = nvkm_rd32(device, 0x124124 + (i * 0x0400));
43	u32 stat = nvkm_rd32(device, 0x124128 + (i * 0x0400));
44	nvkm_error(ibus, "ROP%d: %06x %08x (%08x)\n", i, addr, data, stat);
45	nvkm_mask(device, 0x124128 + (i * 0x0400), 0x00000200, 0x00000000);
46}
47
48static void
49gf100_ibus_intr_gpc(struct nvkm_subdev *ibus, int i)
50{
51	struct nvkm_device *device = ibus->device;
52	u32 addr = nvkm_rd32(device, 0x128120 + (i * 0x0400));
53	u32 data = nvkm_rd32(device, 0x128124 + (i * 0x0400));
54	u32 stat = nvkm_rd32(device, 0x128128 + (i * 0x0400));
55	nvkm_error(ibus, "GPC%d: %06x %08x (%08x)\n", i, addr, data, stat);
56	nvkm_mask(device, 0x128128 + (i * 0x0400), 0x00000200, 0x00000000);
57}
58
59void
60gf100_ibus_intr(struct nvkm_subdev *ibus)
61{
62	struct nvkm_device *device = ibus->device;
63	u32 intr0 = nvkm_rd32(device, 0x121c58);
64	u32 intr1 = nvkm_rd32(device, 0x121c5c);
65	u32 hubnr = nvkm_rd32(device, 0x121c70);
66	u32 ropnr = nvkm_rd32(device, 0x121c74);
67	u32 gpcnr = nvkm_rd32(device, 0x121c78);
68	u32 i;
69
70	for (i = 0; (intr0 & 0x0000ff00) && i < hubnr; i++) {
71		u32 stat = 0x00000100 << i;
72		if (intr0 & stat) {
73			gf100_ibus_intr_hub(ibus, i);
74			intr0 &= ~stat;
75		}
76	}
77
78	for (i = 0; (intr0 & 0xffff0000) && i < ropnr; i++) {
79		u32 stat = 0x00010000 << i;
80		if (intr0 & stat) {
81			gf100_ibus_intr_rop(ibus, i);
82			intr0 &= ~stat;
83		}
84	}
85
86	for (i = 0; intr1 && i < gpcnr; i++) {
87		u32 stat = 0x00000001 << i;
88		if (intr1 & stat) {
89			gf100_ibus_intr_gpc(ibus, i);
90			intr1 &= ~stat;
91		}
92	}
93}
94
95static int
96gf100_ibus_init(struct nvkm_subdev *ibus)
97{
98	struct nvkm_device *device = ibus->device;
99	nvkm_mask(device, 0x122310, 0x0003ffff, 0x00000800);
100	nvkm_wr32(device, 0x12232c, 0x00100064);
101	nvkm_wr32(device, 0x122330, 0x00100064);
102	nvkm_wr32(device, 0x122334, 0x00100064);
103	nvkm_mask(device, 0x122348, 0x0003ffff, 0x00000100);
104	return 0;
105}
106
107static const struct nvkm_subdev_func
108gf100_ibus = {
109	.init = gf100_ibus_init,
110	.intr = gf100_ibus_intr,
111};
112
113int
114gf100_ibus_new(struct nvkm_device *device, int index,
115	       struct nvkm_subdev **pibus)
116{
117	struct nvkm_subdev *ibus;
118	if (!(ibus = *pibus = kzalloc(sizeof(*ibus), GFP_KERNEL)))
119		return -ENOMEM;
120	nvkm_subdev_ctor(&gf100_ibus, device, index, 0, ibus);
121	return 0;
122}
123