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 #include "priv.h"
25
26 #include <core/msgqueue.h>
27 #include <subdev/timer.h>
28
29 bool
nvkm_pmu_fan_controlled(struct nvkm_device * device)30 nvkm_pmu_fan_controlled(struct nvkm_device *device)
31 {
32 struct nvkm_pmu *pmu = device->pmu;
33
34 /* Internal PMU FW does not currently control fans in any way,
35 * allow SW control of fans instead.
36 */
37 if (pmu && pmu->func->code.size)
38 return false;
39
40 /* Default (board-loaded, or VBIOS PMU/PREOS) PMU FW on Fermi
41 * and newer automatically control the fan speed, which would
42 * interfere with SW control.
43 */
44 return (device->chipset >= 0xc0);
45 }
46
47 void
nvkm_pmu_pgob(struct nvkm_pmu * pmu,bool enable)48 nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
49 {
50 if (pmu && pmu->func->pgob)
51 pmu->func->pgob(pmu, enable);
52 }
53
54 static void
nvkm_pmu_recv(struct work_struct * work)55 nvkm_pmu_recv(struct work_struct *work)
56 {
57 struct nvkm_pmu *pmu = container_of(work, typeof(*pmu), recv.work);
58 return pmu->func->recv(pmu);
59 }
60
61 int
nvkm_pmu_send(struct nvkm_pmu * pmu,u32 reply[2],u32 process,u32 message,u32 data0,u32 data1)62 nvkm_pmu_send(struct nvkm_pmu *pmu, u32 reply[2],
63 u32 process, u32 message, u32 data0, u32 data1)
64 {
65 if (!pmu || !pmu->func->send)
66 return -ENODEV;
67 return pmu->func->send(pmu, reply, process, message, data0, data1);
68 }
69
70 static void
nvkm_pmu_intr(struct nvkm_subdev * subdev)71 nvkm_pmu_intr(struct nvkm_subdev *subdev)
72 {
73 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
74 if (!pmu->func->intr)
75 return;
76 pmu->func->intr(pmu);
77 }
78
79 static int
nvkm_pmu_fini(struct nvkm_subdev * subdev,bool suspend)80 nvkm_pmu_fini(struct nvkm_subdev *subdev, bool suspend)
81 {
82 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
83
84 if (pmu->func->fini)
85 pmu->func->fini(pmu);
86
87 flush_work(&pmu->recv.work);
88 return 0;
89 }
90
91 static int
nvkm_pmu_reset(struct nvkm_pmu * pmu)92 nvkm_pmu_reset(struct nvkm_pmu *pmu)
93 {
94 struct nvkm_device *device = pmu->subdev.device;
95
96 if (!pmu->func->enabled(pmu))
97 return 0;
98
99 /* Inhibit interrupts, and wait for idle. */
100 nvkm_wr32(device, 0x10a014, 0x0000ffff);
101 nvkm_msec(device, 2000,
102 if (!nvkm_rd32(device, 0x10a04c))
103 break;
104 );
105
106 /* Reset. */
107 if (pmu->func->reset)
108 pmu->func->reset(pmu);
109
110 /* Wait for IMEM/DMEM scrubbing to be complete. */
111 nvkm_msec(device, 2000,
112 if (!(nvkm_rd32(device, 0x10a10c) & 0x00000006))
113 break;
114 );
115
116 return 0;
117 }
118
119 static int
nvkm_pmu_preinit(struct nvkm_subdev * subdev)120 nvkm_pmu_preinit(struct nvkm_subdev *subdev)
121 {
122 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
123 return nvkm_pmu_reset(pmu);
124 }
125
126 static int
nvkm_pmu_init(struct nvkm_subdev * subdev)127 nvkm_pmu_init(struct nvkm_subdev *subdev)
128 {
129 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
130 int ret = nvkm_pmu_reset(pmu);
131 if (ret == 0 && pmu->func->init)
132 ret = pmu->func->init(pmu);
133 return ret;
134 }
135
136 static int
nvkm_pmu_oneinit(struct nvkm_subdev * subdev)137 nvkm_pmu_oneinit(struct nvkm_subdev *subdev)
138 {
139 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
140 return nvkm_falcon_v1_new(&pmu->subdev, "PMU", 0x10a000, &pmu->falcon);
141 }
142
143 static void *
nvkm_pmu_dtor(struct nvkm_subdev * subdev)144 nvkm_pmu_dtor(struct nvkm_subdev *subdev)
145 {
146 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
147 nvkm_msgqueue_del(&pmu->queue);
148 nvkm_falcon_del(&pmu->falcon);
149 return nvkm_pmu(subdev);
150 }
151
152 static const struct nvkm_subdev_func
153 nvkm_pmu = {
154 .dtor = nvkm_pmu_dtor,
155 .preinit = nvkm_pmu_preinit,
156 .oneinit = nvkm_pmu_oneinit,
157 .init = nvkm_pmu_init,
158 .fini = nvkm_pmu_fini,
159 .intr = nvkm_pmu_intr,
160 };
161
162 int
nvkm_pmu_ctor(const struct nvkm_pmu_func * func,struct nvkm_device * device,int index,struct nvkm_pmu * pmu)163 nvkm_pmu_ctor(const struct nvkm_pmu_func *func, struct nvkm_device *device,
164 int index, struct nvkm_pmu *pmu)
165 {
166 nvkm_subdev_ctor(&nvkm_pmu, device, index, &pmu->subdev);
167 pmu->func = func;
168 INIT_WORK(&pmu->recv.work, nvkm_pmu_recv);
169 init_waitqueue_head(&pmu->recv.wait);
170 return 0;
171 }
172
173 int
nvkm_pmu_new_(const struct nvkm_pmu_func * func,struct nvkm_device * device,int index,struct nvkm_pmu ** ppmu)174 nvkm_pmu_new_(const struct nvkm_pmu_func *func, struct nvkm_device *device,
175 int index, struct nvkm_pmu **ppmu)
176 {
177 struct nvkm_pmu *pmu;
178 if (!(pmu = *ppmu = kzalloc(sizeof(*pmu), GFP_KERNEL)))
179 return -ENOMEM;
180 return nvkm_pmu_ctor(func, device, index, *ppmu);
181 }
182
