1 /* $NetBSD: nouveau_nvkm_engine_device_ctrl.c,v 1.3 2021/12/18 23:45:34 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 <bskeggs@redhat.com>
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_device_ctrl.c,v 1.3 2021/12/18 23:45:34 riastradh Exp $");
28
29 #include "ctrl.h"
30
31 #include <core/client.h>
32 #include <subdev/clk.h>
33
34 #include <nvif/class.h>
35 #include <nvif/if0001.h>
36 #include <nvif/ioctl.h>
37 #include <nvif/unpack.h>
38
39 static int
nvkm_control_mthd_pstate_info(struct nvkm_control * ctrl,void * data,u32 size)40 nvkm_control_mthd_pstate_info(struct nvkm_control *ctrl, void *data, u32 size)
41 {
42 union {
43 struct nvif_control_pstate_info_v0 v0;
44 } *args = data;
45 struct nvkm_clk *clk = ctrl->device->clk;
46 int ret = -ENOSYS;
47
48 nvif_ioctl(&ctrl->object, "control pstate info size %d\n", size);
49 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
50 nvif_ioctl(&ctrl->object, "control pstate info vers %d\n",
51 args->v0.version);
52 } else
53 return ret;
54
55 if (clk) {
56 args->v0.count = clk->state_nr;
57 args->v0.ustate_ac = clk->ustate_ac;
58 args->v0.ustate_dc = clk->ustate_dc;
59 args->v0.pwrsrc = clk->pwrsrc;
60 args->v0.pstate = clk->pstate;
61 } else {
62 args->v0.count = 0;
63 args->v0.ustate_ac = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
64 args->v0.ustate_dc = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
65 args->v0.pwrsrc = -ENOSYS;
66 args->v0.pstate = NVIF_CONTROL_PSTATE_INFO_V0_PSTATE_UNKNOWN;
67 }
68
69 return 0;
70 }
71
72 static int
nvkm_control_mthd_pstate_attr(struct nvkm_control * ctrl,void * data,u32 size)73 nvkm_control_mthd_pstate_attr(struct nvkm_control *ctrl, void *data, u32 size)
74 {
75 union {
76 struct nvif_control_pstate_attr_v0 v0;
77 } *args = data;
78 struct nvkm_clk *clk = ctrl->device->clk;
79 const struct nvkm_domain *domain;
80 struct nvkm_pstate *pstate;
81 struct nvkm_cstate *cstate;
82 int i = 0, j = -1;
83 u32 lo, hi;
84 int ret = -ENOSYS;
85
86 nvif_ioctl(&ctrl->object, "control pstate attr size %d\n", size);
87 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
88 nvif_ioctl(&ctrl->object,
89 "control pstate attr vers %d state %d index %d\n",
90 args->v0.version, args->v0.state, args->v0.index);
91 if (!clk)
92 return -ENODEV;
93 if (args->v0.state < NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT)
94 return -EINVAL;
95 if (args->v0.state >= clk->state_nr)
96 return -EINVAL;
97 } else
98 return ret;
99 domain = clk->domains;
100
101 while (domain->name != nv_clk_src_max) {
102 if (domain->mname && ++j == args->v0.index)
103 break;
104 domain++;
105 }
106
107 if (domain->name == nv_clk_src_max)
108 return -EINVAL;
109
110 if (args->v0.state != NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT) {
111 list_for_each_entry(pstate, &clk->states, head) {
112 if (i++ == args->v0.state)
113 break;
114 }
115
116 lo = pstate->base.domain[domain->name];
117 hi = lo;
118 list_for_each_entry(cstate, &pstate->list, head) {
119 lo = min(lo, cstate->domain[domain->name]);
120 hi = max(hi, cstate->domain[domain->name]);
121 }
122
123 args->v0.state = pstate->pstate;
124 } else {
125 lo = max(nvkm_clk_read(clk, domain->name), 0);
126 hi = lo;
127 }
128
129 snprintf(args->v0.name, sizeof(args->v0.name), "%s", domain->mname);
130 snprintf(args->v0.unit, sizeof(args->v0.unit), "MHz");
131 args->v0.min = lo / domain->mdiv;
132 args->v0.max = hi / domain->mdiv;
133
134 args->v0.index = 0;
135 while ((++domain)->name != nv_clk_src_max) {
136 if (domain->mname) {
137 args->v0.index = ++j;
138 break;
139 }
140 }
141
142 return 0;
143 }
144
145 static int
nvkm_control_mthd_pstate_user(struct nvkm_control * ctrl,void * data,u32 size)146 nvkm_control_mthd_pstate_user(struct nvkm_control *ctrl, void *data, u32 size)
147 {
148 union {
149 struct nvif_control_pstate_user_v0 v0;
150 } *args = data;
151 struct nvkm_clk *clk = ctrl->device->clk;
152 int ret = -ENOSYS;
153
154 nvif_ioctl(&ctrl->object, "control pstate user size %d\n", size);
155 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
156 nvif_ioctl(&ctrl->object,
157 "control pstate user vers %d ustate %d pwrsrc %d\n",
158 args->v0.version, args->v0.ustate, args->v0.pwrsrc);
159 if (!clk)
160 return -ENODEV;
161 } else
162 return ret;
163
164 if (args->v0.pwrsrc >= 0) {
165 ret |= nvkm_clk_ustate(clk, args->v0.ustate, args->v0.pwrsrc);
166 } else {
167 ret |= nvkm_clk_ustate(clk, args->v0.ustate, 0);
168 ret |= nvkm_clk_ustate(clk, args->v0.ustate, 1);
169 }
170
171 return ret;
172 }
173
174 static int
nvkm_control_mthd(struct nvkm_object * object,u32 mthd,void * data,u32 size)175 nvkm_control_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
176 {
177 struct nvkm_control *ctrl = nvkm_control(object);
178 switch (mthd) {
179 case NVIF_CONTROL_PSTATE_INFO:
180 return nvkm_control_mthd_pstate_info(ctrl, data, size);
181 case NVIF_CONTROL_PSTATE_ATTR:
182 return nvkm_control_mthd_pstate_attr(ctrl, data, size);
183 case NVIF_CONTROL_PSTATE_USER:
184 return nvkm_control_mthd_pstate_user(ctrl, data, size);
185 default:
186 break;
187 }
188 return -EINVAL;
189 }
190
191 static const struct nvkm_object_func
192 nvkm_control = {
193 .mthd = nvkm_control_mthd,
194 };
195
196 static int
nvkm_control_new(struct nvkm_device * device,const struct nvkm_oclass * oclass,void * data,u32 size,struct nvkm_object ** pobject)197 nvkm_control_new(struct nvkm_device *device, const struct nvkm_oclass *oclass,
198 void *data, u32 size, struct nvkm_object **pobject)
199 {
200 struct nvkm_control *ctrl;
201
202 if (!(ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL)))
203 return -ENOMEM;
204 *pobject = &ctrl->object;
205 ctrl->device = device;
206
207 nvkm_object_ctor(&nvkm_control, oclass, &ctrl->object);
208 return 0;
209 }
210
211 const struct nvkm_device_oclass
212 nvkm_control_oclass = {
213 .base.oclass = NVIF_CLASS_CONTROL,
214 .base.minver = -1,
215 .base.maxver = -1,
216 .ctor = nvkm_control_new,
217 };
218