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