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 <subdev/ibus.h>
25
26static void
27gk104_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 * 0x0800));
31	u32 data = nvkm_rd32(device, 0x122124 + (i * 0x0800));
32	u32 stat = nvkm_rd32(device, 0x122128 + (i * 0x0800));
33	nvkm_error(ibus, "HUB%d: %06x %08x (%08x)\n", i, addr, data, stat);
34	nvkm_mask(device, 0x122128 + (i * 0x0800), 0x00000200, 0x00000000);
35}
36
37static void
38gk104_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 * 0x0800));
42	u32 data = nvkm_rd32(device, 0x124124 + (i * 0x0800));
43	u32 stat = nvkm_rd32(device, 0x124128 + (i * 0x0800));
44	nvkm_error(ibus, "ROP%d: %06x %08x (%08x)\n", i, addr, data, stat);
45	nvkm_mask(device, 0x124128 + (i * 0x0800), 0x00000200, 0x00000000);
46}
47
48static void
49gk104_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 * 0x0800));
53	u32 data = nvkm_rd32(device, 0x128124 + (i * 0x0800));
54	u32 stat = nvkm_rd32(device, 0x128128 + (i * 0x0800));
55	nvkm_error(ibus, "GPC%d: %06x %08x (%08x)\n", i, addr, data, stat);
56	nvkm_mask(device, 0x128128 + (i * 0x0800), 0x00000200, 0x00000000);
57}
58
59static void
60gk104_ibus_intr(struct nvkm_subdev *ibus)
61{
62	struct nvkm_device *device = ibus->device;
63	u32 intr0 = nvkm_rd32(device, 0x120058);
64	u32 intr1 = nvkm_rd32(device, 0x12005c);
65	u32 hubnr = nvkm_rd32(device, 0x120070);
66	u32 ropnr = nvkm_rd32(device, 0x120074);
67	u32 gpcnr = nvkm_rd32(device, 0x120078);
68	u32 i;
69
70	for (i = 0; (intr0 & 0x0000ff00) && i < hubnr; i++) {
71		u32 stat = 0x00000100 << i;
72		if (intr0 & stat) {
73			gk104_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			gk104_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			gk104_ibus_intr_gpc(ibus, i);
90			intr1 &= ~stat;
91		}
92	}
93}
94
95static int
96gk104_ibus_init(struct nvkm_subdev *ibus)
97{
98	struct nvkm_device *device = ibus->device;
99	nvkm_mask(device, 0x122318, 0x0003ffff, 0x00001000);
100	nvkm_mask(device, 0x12231c, 0x0003ffff, 0x00000200);
101	nvkm_mask(device, 0x122310, 0x0003ffff, 0x00000800);
102	nvkm_mask(device, 0x122348, 0x0003ffff, 0x00000100);
103	nvkm_mask(device, 0x1223b0, 0x0003ffff, 0x00000fff);
104	nvkm_mask(device, 0x122348, 0x0003ffff, 0x00000200);
105	nvkm_mask(device, 0x122358, 0x0003ffff, 0x00002880);
106	return 0;
107}
108
109static const struct nvkm_subdev_func
110gk104_ibus = {
111	.preinit = gk104_ibus_init,
112	.init = gk104_ibus_init,
113	.intr = gk104_ibus_intr,
114};
115
116int
117gk104_ibus_new(struct nvkm_device *device, int index,
118	       struct nvkm_subdev **pibus)
119{
120	struct nvkm_subdev *ibus;
121	if (!(ibus = *pibus = kzalloc(sizeof(*ibus), GFP_KERNEL)))
122		return -ENOMEM;
123	nvkm_subdev_ctor(&gk104_ibus, device, index, 0, ibus);
124	return 0;
125}
126