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 = -ENOSYS;
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