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 void
nvkm_pmu_pgob(struct nvkm_pmu * pmu,bool enable)30 nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
31 {
32 if (pmu && pmu->func->pgob)
33 pmu->func->pgob(pmu, enable);
34 }
35
36 static void
nvkm_pmu_recv(struct work_struct * work)37 nvkm_pmu_recv(struct work_struct *work)
38 {
39 struct nvkm_pmu *pmu = container_of(work, typeof(*pmu), recv.work);
40 return pmu->func->recv(pmu);
41 }
42
43 int
nvkm_pmu_send(struct nvkm_pmu * pmu,u32 reply[2],u32 process,u32 message,u32 data0,u32 data1)44 nvkm_pmu_send(struct nvkm_pmu *pmu, u32 reply[2],
45 u32 process, u32 message, u32 data0, u32 data1)
46 {
47 if (!pmu || !pmu->func->send)
48 return -ENODEV;
49 return pmu->func->send(pmu, reply, process, message, data0, data1);
50 }
51
52 static void
nvkm_pmu_intr(struct nvkm_subdev * subdev)53 nvkm_pmu_intr(struct nvkm_subdev *subdev)
54 {
55 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
56 if (!pmu->func->intr)
57 return;
58 pmu->func->intr(pmu);
59 }
60
61 static int
nvkm_pmu_fini(struct nvkm_subdev * subdev,bool suspend)62 nvkm_pmu_fini(struct nvkm_subdev *subdev, bool suspend)
63 {
64 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
65
66 if (pmu->func->fini)
67 pmu->func->fini(pmu);
68
69 flush_work(&pmu->recv.work);
70 return 0;
71 }
72
73 static int
nvkm_pmu_reset(struct nvkm_pmu * pmu)74 nvkm_pmu_reset(struct nvkm_pmu *pmu)
75 {
76 struct nvkm_device *device = pmu->subdev.device;
77
78 if (!pmu->func->enabled(pmu))
79 return 0;
80
81 /* Inhibit interrupts, and wait for idle. */
82 nvkm_wr32(device, 0x10a014, 0x0000ffff);
83 nvkm_msec(device, 2000,
84 if (!nvkm_rd32(device, 0x10a04c))
85 break;
86 );
87
88 /* Reset. */
89 if (pmu->func->reset)
90 pmu->func->reset(pmu);
91
92 /* Wait for IMEM/DMEM scrubbing to be complete. */
93 nvkm_msec(device, 2000,
94 if (!(nvkm_rd32(device, 0x10a10c) & 0x00000006))
95 break;
96 );
97
98 return 0;
99 }
100
101 static int
nvkm_pmu_preinit(struct nvkm_subdev * subdev)102 nvkm_pmu_preinit(struct nvkm_subdev *subdev)
103 {
104 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
105 return nvkm_pmu_reset(pmu);
106 }
107
108 static int
nvkm_pmu_init(struct nvkm_subdev * subdev)109 nvkm_pmu_init(struct nvkm_subdev *subdev)
110 {
111 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
112 int ret = nvkm_pmu_reset(pmu);
113 if (ret == 0 && pmu->func->init)
114 ret = pmu->func->init(pmu);
115 return ret;
116 }
117
118 static int
nvkm_pmu_oneinit(struct nvkm_subdev * subdev)119 nvkm_pmu_oneinit(struct nvkm_subdev *subdev)
120 {
121 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
122 return nvkm_falcon_v1_new(&pmu->subdev, "PMU", 0x10a000, &pmu->falcon);
123 }
124
125 static void *
nvkm_pmu_dtor(struct nvkm_subdev * subdev)126 nvkm_pmu_dtor(struct nvkm_subdev *subdev)
127 {
128 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
129 nvkm_msgqueue_del(&pmu->queue);
130 nvkm_falcon_del(&pmu->falcon);
131 return nvkm_pmu(subdev);
132 }
133
134 static const struct nvkm_subdev_func
135 nvkm_pmu = {
136 .dtor = nvkm_pmu_dtor,
137 .preinit = nvkm_pmu_preinit,
138 .oneinit = nvkm_pmu_oneinit,
139 .init = nvkm_pmu_init,
140 .fini = nvkm_pmu_fini,
141 .intr = nvkm_pmu_intr,
142 };
143
144 int
nvkm_pmu_ctor(const struct nvkm_pmu_func * func,struct nvkm_device * device,int index,struct nvkm_pmu * pmu)145 nvkm_pmu_ctor(const struct nvkm_pmu_func *func, struct nvkm_device *device,
146 int index, struct nvkm_pmu *pmu)
147 {
148 nvkm_subdev_ctor(&nvkm_pmu, device, index, &pmu->subdev);
149 pmu->func = func;
150 INIT_WORK(&pmu->recv.work, nvkm_pmu_recv);
151 init_waitqueue_head(&pmu->recv.wait);
152 return 0;
153 }
154
155 int
nvkm_pmu_new_(const struct nvkm_pmu_func * func,struct nvkm_device * device,int index,struct nvkm_pmu ** ppmu)156 nvkm_pmu_new_(const struct nvkm_pmu_func *func, struct nvkm_device *device,
157 int index, struct nvkm_pmu **ppmu)
158 {
159 struct nvkm_pmu *pmu;
160 if (!(pmu = *ppmu = kzalloc(sizeof(*pmu), GFP_KERNEL)))
161 return -ENOMEM;
162 return nvkm_pmu_ctor(func, device, index, *ppmu);
163 }
164
