1 /* $NetBSD: nouveau_nvkm_subdev_pmu_base.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $ */
2
3 /*
4 * Copyright 2013 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_pmu_base.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $");
28
29 #include "priv.h"
30
31 #include <core/firmware.h>
32 #include <subdev/timer.h>
33
34 bool
nvkm_pmu_fan_controlled(struct nvkm_device * device)35 nvkm_pmu_fan_controlled(struct nvkm_device *device)
36 {
37 struct nvkm_pmu *pmu = device->pmu;
38
39 /* Internal PMU FW does not currently control fans in any way,
40 * allow SW control of fans instead.
41 */
42 if (pmu && pmu->func->code.size)
43 return false;
44
45 /* Default (board-loaded, or VBIOS PMU/PREOS) PMU FW on Fermi
46 * and newer automatically control the fan speed, which would
47 * interfere with SW control.
48 */
49 return (device->chipset >= 0xc0);
50 }
51
52 void
nvkm_pmu_pgob(struct nvkm_pmu * pmu,bool enable)53 nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
54 {
55 if (pmu && pmu->func->pgob)
56 pmu->func->pgob(pmu, enable);
57 }
58
59 static void
nvkm_pmu_recv(struct work_struct * work)60 nvkm_pmu_recv(struct work_struct *work)
61 {
62 struct nvkm_pmu *pmu = container_of(work, typeof(*pmu), recv.work);
63 return pmu->func->recv(pmu);
64 }
65
66 int
nvkm_pmu_send(struct nvkm_pmu * pmu,u32 reply[2],u32 process,u32 message,u32 data0,u32 data1)67 nvkm_pmu_send(struct nvkm_pmu *pmu, u32 reply[2],
68 u32 process, u32 message, u32 data0, u32 data1)
69 {
70 if (!pmu || !pmu->func->send)
71 return -ENODEV;
72 return pmu->func->send(pmu, reply, process, message, data0, data1);
73 }
74
75 static void
nvkm_pmu_intr(struct nvkm_subdev * subdev)76 nvkm_pmu_intr(struct nvkm_subdev *subdev)
77 {
78 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
79 if (!pmu->func->intr)
80 return;
81 pmu->func->intr(pmu);
82 }
83
84 static int
nvkm_pmu_fini(struct nvkm_subdev * subdev,bool suspend)85 nvkm_pmu_fini(struct nvkm_subdev *subdev, bool suspend)
86 {
87 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
88
89 if (pmu->func->fini)
90 pmu->func->fini(pmu);
91
92 flush_work(&pmu->recv.work);
93
94 reinit_completion(&pmu->wpr_ready);
95
96 nvkm_falcon_cmdq_fini(pmu->lpq);
97 nvkm_falcon_cmdq_fini(pmu->hpq);
98 pmu->initmsg_received = false;
99 return 0;
100 }
101
102 static int
nvkm_pmu_reset(struct nvkm_pmu * pmu)103 nvkm_pmu_reset(struct nvkm_pmu *pmu)
104 {
105 struct nvkm_device *device = pmu->subdev.device;
106
107 if (!pmu->func->enabled(pmu))
108 return 0;
109
110 /* Inhibit interrupts, and wait for idle. */
111 nvkm_wr32(device, 0x10a014, 0x0000ffff);
112 nvkm_msec(device, 2000,
113 if (!nvkm_rd32(device, 0x10a04c))
114 break;
115 );
116
117 /* Reset. */
118 if (pmu->func->reset)
119 pmu->func->reset(pmu);
120
121 /* Wait for IMEM/DMEM scrubbing to be complete. */
122 nvkm_msec(device, 2000,
123 if (!(nvkm_rd32(device, 0x10a10c) & 0x00000006))
124 break;
125 );
126
127 return 0;
128 }
129
130 static int
nvkm_pmu_preinit(struct nvkm_subdev * subdev)131 nvkm_pmu_preinit(struct nvkm_subdev *subdev)
132 {
133 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
134 return nvkm_pmu_reset(pmu);
135 }
136
137 static int
nvkm_pmu_init(struct nvkm_subdev * subdev)138 nvkm_pmu_init(struct nvkm_subdev *subdev)
139 {
140 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
141 int ret = nvkm_pmu_reset(pmu);
142 if (ret == 0 && pmu->func->init)
143 ret = pmu->func->init(pmu);
144 return ret;
145 }
146
147 static void *
nvkm_pmu_dtor(struct nvkm_subdev * subdev)148 nvkm_pmu_dtor(struct nvkm_subdev *subdev)
149 {
150 struct nvkm_pmu *pmu = nvkm_pmu(subdev);
151 #ifdef __NetBSD__
152 DRM_DESTROY_WAITQUEUE(&pmu->recv.wait);
153 #endif
154 nvkm_falcon_msgq_del(&pmu->msgq);
155 nvkm_falcon_cmdq_del(&pmu->lpq);
156 nvkm_falcon_cmdq_del(&pmu->hpq);
157 nvkm_falcon_qmgr_del(&pmu->qmgr);
158 nvkm_falcon_dtor(&pmu->falcon);
159 return nvkm_pmu(subdev);
160 }
161
162 static const struct nvkm_subdev_func
163 nvkm_pmu = {
164 .dtor = nvkm_pmu_dtor,
165 .preinit = nvkm_pmu_preinit,
166 .init = nvkm_pmu_init,
167 .fini = nvkm_pmu_fini,
168 .intr = nvkm_pmu_intr,
169 };
170
171 int
nvkm_pmu_ctor(const struct nvkm_pmu_fwif * fwif,struct nvkm_device * device,int index,struct nvkm_pmu * pmu)172 nvkm_pmu_ctor(const struct nvkm_pmu_fwif *fwif, struct nvkm_device *device,
173 int index, struct nvkm_pmu *pmu)
174 {
175 int ret;
176
177 nvkm_subdev_ctor(&nvkm_pmu, device, index, &pmu->subdev);
178
179 INIT_WORK(&pmu->recv.work, nvkm_pmu_recv);
180 #ifdef __NetBSD__
181 DRM_INIT_WAITQUEUE(&pmu->recv.wait, "nvpmu");
182 #else
183 init_waitqueue_head(&pmu->recv.wait);
184 #endif
185
186 fwif = nvkm_firmware_load(&pmu->subdev, fwif, "Pmu", pmu);
187 if (IS_ERR(fwif))
188 return PTR_ERR(fwif);
189
190 pmu->func = fwif->func;
191
192 ret = nvkm_falcon_ctor(pmu->func->flcn, &pmu->subdev,
193 nvkm_subdev_name[pmu->subdev.index], 0x10a000,
194 &pmu->falcon);
195 if (ret)
196 return ret;
197
198 if ((ret = nvkm_falcon_qmgr_new(&pmu->falcon, &pmu->qmgr)) ||
199 (ret = nvkm_falcon_cmdq_new(pmu->qmgr, "hpq", &pmu->hpq)) ||
200 (ret = nvkm_falcon_cmdq_new(pmu->qmgr, "lpq", &pmu->lpq)) ||
201 (ret = nvkm_falcon_msgq_new(pmu->qmgr, "msgq", &pmu->msgq)))
202 return ret;
203
204 init_completion(&pmu->wpr_ready);
205 return 0;
206 }
207
208 int
nvkm_pmu_new_(const struct nvkm_pmu_fwif * fwif,struct nvkm_device * device,int index,struct nvkm_pmu ** ppmu)209 nvkm_pmu_new_(const struct nvkm_pmu_fwif *fwif, struct nvkm_device *device,
210 int index, struct nvkm_pmu **ppmu)
211 {
212 struct nvkm_pmu *pmu;
213 if (!(pmu = *ppmu = kzalloc(sizeof(*pmu), GFP_KERNEL)))
214 return -ENOMEM;
215 return nvkm_pmu_ctor(fwif, device, index, *ppmu);
216 }
217