ctrl.c

  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
 34static int
 35nvkm_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
 67static int
 68nvkm_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
140static int
141nvkm_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
169static int
170nvkm_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
186static const struct nvkm_object_func
187nvkm_control = {
188	.mthd = nvkm_control_mthd,
189};
190
191static int
192nvkm_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
206const struct nvkm_device_oclass
207nvkm_control_oclass = {
208	.base.oclass = NVIF_CLASS_CONTROL,
209	.base.minver = -1,
210	.base.maxver = -1,
211	.ctor = nvkm_control_new,
212};