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 "priv.h"
25
26#include <core/client.h>
27#include <subdev/clk.h>
28
29#include <nvif/class.h>
30#include <nvif/ioctl.h>
31#include <nvif/unpack.h>
32
33static int
34nvkm_control_mthd_pstate_info(struct nvkm_object *object, void *data, u32 size)
35{
36	union {
37		struct nvif_control_pstate_info_v0 v0;
38	} *args = data;
39	struct nvkm_clk *clk = nvkm_clk(object);
40	int ret;
41
42	nv_ioctl(object, "control pstate info size %d\n", size);
43	if (nvif_unpack(args->v0, 0, 0, false)) {
44		nv_ioctl(object, "control pstate info vers %d\n",
45			 args->v0.version);
46	} else
47		return ret;
48
49	if (clk) {
50		args->v0.count = clk->state_nr;
51		args->v0.ustate_ac = clk->ustate_ac;
52		args->v0.ustate_dc = clk->ustate_dc;
53		args->v0.pwrsrc = clk->pwrsrc;
54		args->v0.pstate = clk->pstate;
55	} else {
56		args->v0.count = 0;
57		args->v0.ustate_ac = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
58		args->v0.ustate_dc = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
59		args->v0.pwrsrc = -ENOSYS;
60		args->v0.pstate = NVIF_CONTROL_PSTATE_INFO_V0_PSTATE_UNKNOWN;
61	}
62
63	return 0;
64}
65
66static int
67nvkm_control_mthd_pstate_attr(struct nvkm_object *object, void *data, u32 size)
68{
69	union {
70		struct nvif_control_pstate_attr_v0 v0;
71	} *args = data;
72	struct nvkm_clk *clk = nvkm_clk(object);
73	struct nvkm_domain *domain;
74	struct nvkm_pstate *pstate;
75	struct nvkm_cstate *cstate;
76	int i = 0, j = -1;
77	u32 lo, hi;
78	int ret;
79
80	nv_ioctl(object, "control pstate attr size %d\n", size);
81	if (nvif_unpack(args->v0, 0, 0, false)) {
82		nv_ioctl(object, "control pstate attr vers %d state %d "
83				 "index %d\n",
84			 args->v0.version, args->v0.state, args->v0.index);
85		if (!clk)
86			return -ENODEV;
87		if (args->v0.state < NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT)
88			return -EINVAL;
89		if (args->v0.state >= clk->state_nr)
90			return -EINVAL;
91	} else
92		return ret;
93	domain = clk->domains;
94
95	while (domain->name != nv_clk_src_max) {
96		if (domain->mname && ++j == args->v0.index)
97			break;
98		domain++;
99	}
100
101	if (domain->name == nv_clk_src_max)
102		return -EINVAL;
103
104	if (args->v0.state != NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT) {
105		list_for_each_entry(pstate, &clk->states, head) {
106			if (i++ == args->v0.state)
107				break;
108		}
109
110		lo = pstate->base.domain[domain->name];
111		hi = lo;
112		list_for_each_entry(cstate, &pstate->list, head) {
113			lo = min(lo, cstate->domain[domain->name]);
114			hi = max(hi, cstate->domain[domain->name]);
115		}
116
117		args->v0.state = pstate->pstate;
118	} else {
119		lo = max(clk->read(clk, domain->name), 0);
120		hi = lo;
121	}
122
123	snprintf(args->v0.name, sizeof(args->v0.name), "%s", domain->mname);
124	snprintf(args->v0.unit, sizeof(args->v0.unit), "MHz");
125	args->v0.min = lo / domain->mdiv;
126	args->v0.max = hi / domain->mdiv;
127
128	args->v0.index = 0;
129	while ((++domain)->name != nv_clk_src_max) {
130		if (domain->mname) {
131			args->v0.index = ++j;
132			break;
133		}
134	}
135
136	return 0;
137}
138
139static int
140nvkm_control_mthd_pstate_user(struct nvkm_object *object, void *data, u32 size)
141{
142	union {
143		struct nvif_control_pstate_user_v0 v0;
144	} *args = data;
145	struct nvkm_clk *clk = nvkm_clk(object);
146	int ret;
147
148	nv_ioctl(object, "control pstate user size %d\n", size);
149	if (nvif_unpack(args->v0, 0, 0, false)) {
150		nv_ioctl(object, "control pstate user vers %d ustate %d "
151				 "pwrsrc %d\n", args->v0.version,
152			 args->v0.ustate, args->v0.pwrsrc);
153		if (!clk)
154			return -ENODEV;
155	} else
156		return ret;
157
158	if (args->v0.pwrsrc >= 0) {
159		ret |= nvkm_clk_ustate(clk, args->v0.ustate, args->v0.pwrsrc);
160	} else {
161		ret |= nvkm_clk_ustate(clk, args->v0.ustate, 0);
162		ret |= nvkm_clk_ustate(clk, args->v0.ustate, 1);
163	}
164
165	return ret;
166}
167
168static int
169nvkm_control_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
170{
171	switch (mthd) {
172	case NVIF_CONTROL_PSTATE_INFO:
173		return nvkm_control_mthd_pstate_info(object, data, size);
174	case NVIF_CONTROL_PSTATE_ATTR:
175		return nvkm_control_mthd_pstate_attr(object, data, size);
176	case NVIF_CONTROL_PSTATE_USER:
177		return nvkm_control_mthd_pstate_user(object, data, size);
178	default:
179		break;
180	}
181	return -EINVAL;
182}
183
184static struct nvkm_ofuncs
185nvkm_control_ofuncs = {
186	.ctor = _nvkm_object_ctor,
187	.dtor = nvkm_object_destroy,
188	.init = nvkm_object_init,
189	.fini = nvkm_object_fini,
190	.mthd = nvkm_control_mthd,
191};
192
193struct nvkm_oclass
194nvkm_control_oclass[] = {
195	{ .handle = NVIF_IOCTL_NEW_V0_CONTROL,
196	  .ofuncs = &nvkm_control_ofuncs
197	},
198	{}
199};
200