1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Copyright 2012 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include <subdev/mc.h>
#include <core/option.h>
static inline u32
nouveau_mc_intr_mask(struct nouveau_mc *pmc)
{
u32 intr = nv_rd32(pmc, 0x000100);
if (intr == 0xffffffff) /* likely fallen off the bus */
intr = 0x00000000;
return intr;
}
static irqreturn_t
nouveau_mc_intr(int irq, void *arg)
{
struct nouveau_mc *pmc = arg;
const struct nouveau_mc_oclass *oclass = (void *)nv_object(pmc)->oclass;
const struct nouveau_mc_intr *map = oclass->intr;
struct nouveau_subdev *unit;
u32 intr;
nv_wr32(pmc, 0x000140, 0x00000000);
nv_rd32(pmc, 0x000140);
intr = nouveau_mc_intr_mask(pmc);
if (pmc->use_msi)
oclass->msi_rearm(pmc);
if (intr) {
u32 stat = intr = nouveau_mc_intr_mask(pmc);
while (map->stat) {
if (intr & map->stat) {
unit = nouveau_subdev(pmc, map->unit);
if (unit && unit->intr)
unit->intr(unit);
stat &= ~map->stat;
}
map++;
}
if (stat)
nv_error(pmc, "unknown intr 0x%08x\n", stat);
}
nv_wr32(pmc, 0x000140, 0x00000001);
return intr ? IRQ_HANDLED : IRQ_NONE;
}
int
_nouveau_mc_fini(struct nouveau_object *object, bool suspend)
{
struct nouveau_mc *pmc = (void *)object;
nv_wr32(pmc, 0x000140, 0x00000000);
return nouveau_subdev_fini(&pmc->base, suspend);
}
int
_nouveau_mc_init(struct nouveau_object *object)
{
struct nouveau_mc *pmc = (void *)object;
int ret = nouveau_subdev_init(&pmc->base);
if (ret)
return ret;
nv_wr32(pmc, 0x000140, 0x00000001);
return 0;
}
void
_nouveau_mc_dtor(struct nouveau_object *object)
{
struct nouveau_device *device = nv_device(object);
struct nouveau_mc *pmc = (void *)object;
free_irq(pmc->irq, pmc);
if (pmc->use_msi)
pci_disable_msi(device->pdev);
nouveau_subdev_destroy(&pmc->base);
}
int
nouveau_mc_create_(struct nouveau_object *parent, struct nouveau_object *engine,
struct nouveau_oclass *bclass, int length, void **pobject)
{
const struct nouveau_mc_oclass *oclass = (void *)bclass;
struct nouveau_device *device = nv_device(parent);
struct nouveau_mc *pmc;
int ret;
ret = nouveau_subdev_create_(parent, engine, bclass, 0, "PMC",
"master", length, pobject);
pmc = *pobject;
if (ret)
return ret;
if (nv_device_is_pci(device))
switch (device->pdev->device & 0x0ff0) {
case 0x00f0:
case 0x02e0:
/* BR02? NFI how these would be handled yet exactly */
break;
default:
switch (device->chipset) {
case 0xaa:
/* reported broken, nv also disable it */
break;
default:
pmc->use_msi = true;
break;
}
pmc->use_msi = nouveau_boolopt(device->cfgopt, "NvMSI",
pmc->use_msi);
if (pmc->use_msi && oclass->msi_rearm) {
pmc->use_msi = pci_enable_msi(device->pdev) == 0;
if (pmc->use_msi) {
nv_info(pmc, "MSI interrupts enabled\n");
oclass->msi_rearm(pmc);
}
} else {
pmc->use_msi = false;
}
}
ret = nv_device_get_irq(device, true);
if (ret < 0)
return ret;
pmc->irq = ret;
ret = request_irq(pmc->irq, nouveau_mc_intr, IRQF_SHARED, "nouveau",
pmc);
if (ret < 0)
return ret;
return 0;
}
|
