nouveau_pm.c 8.3 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
/*
 * Copyright 2010 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 */

#include "drmP.h"

#include "nouveau_drv.h"
#include "nouveau_pm.h"

30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
static int
nouveau_pm_clock_set(struct drm_device *dev, u8 id, u32 khz)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
	void *pre_state;

	if (khz == 0)
		return 0;

	pre_state = pm->clock_pre(dev, id, khz);
	if (IS_ERR(pre_state))
		return PTR_ERR(pre_state);

	if (pre_state)
		pm->clock_set(dev, pre_state);
	return 0;
}

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
static int
nouveau_pm_perflvl_set(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
	int ret;

	if (perflvl == pm->cur)
		return 0;

	if (pm->voltage.supported && pm->voltage_set && perflvl->voltage) {
		ret = pm->voltage_set(dev, perflvl->voltage);
		if (ret) {
			NV_ERROR(dev, "voltage_set %d failed: %d\n",
				 perflvl->voltage, ret);
		}
	}

	nouveau_pm_clock_set(dev, PLL_CORE, perflvl->core);
	nouveau_pm_clock_set(dev, PLL_SHADER, perflvl->shader);
	nouveau_pm_clock_set(dev, PLL_MEMORY, perflvl->memory);
	nouveau_pm_clock_set(dev, PLL_UNK05, perflvl->unk05);

	pm->cur = perflvl;
	return 0;
}

76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107
static int
nouveau_pm_profile_set(struct drm_device *dev, const char *profile)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
	struct nouveau_pm_level *perflvl = NULL;

	/* safety precaution, for now */
	if (nouveau_perflvl_wr != 7777)
		return -EPERM;

	if (!pm->clock_set)
		return -EINVAL;

	if (!strncmp(profile, "boot", 4))
		perflvl = &pm->boot;
	else {
		int pl = simple_strtol(profile, NULL, 10);
		int i;

		for (i = 0; i < pm->nr_perflvl; i++) {
			if (pm->perflvl[i].id == pl) {
				perflvl = &pm->perflvl[i];
				break;
			}
		}

		if (!perflvl)
			return -EINVAL;
	}

	NV_INFO(dev, "setting performance level: %s\n", profile);
108
	return nouveau_pm_perflvl_set(dev, perflvl);
109 110
}

111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
static int
nouveau_pm_perflvl_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
	int ret;

	if (!pm->clock_get)
		return -EINVAL;

	memset(perflvl, 0, sizeof(*perflvl));

	ret = pm->clock_get(dev, PLL_CORE);
	if (ret > 0)
		perflvl->core = ret;

	ret = pm->clock_get(dev, PLL_MEMORY);
	if (ret > 0)
		perflvl->memory = ret;

	ret = pm->clock_get(dev, PLL_SHADER);
	if (ret > 0)
		perflvl->shader = ret;

	ret = pm->clock_get(dev, PLL_UNK05);
	if (ret > 0)
		perflvl->unk05 = ret;

	if (pm->voltage.supported && pm->voltage_get) {
		ret = pm->voltage_get(dev);
		if (ret > 0)
			perflvl->voltage = ret;
	}

	return 0;
}

static void
nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
{
151 152 153 154 155
	char c[16], s[16], v[16], f[16];

	c[0] = '\0';
	if (perflvl->core)
		snprintf(c, sizeof(c), " core %dMHz", perflvl->core / 1000);
156 157 158 159 160 161 162 163 164 165 166 167 168

	s[0] = '\0';
	if (perflvl->shader)
		snprintf(s, sizeof(s), " shader %dMHz", perflvl->shader / 1000);

	v[0] = '\0';
	if (perflvl->voltage)
		snprintf(v, sizeof(v), " voltage %dmV", perflvl->voltage * 10);

	f[0] = '\0';
	if (perflvl->fanspeed)
		snprintf(f, sizeof(f), " fanspeed %d%%", perflvl->fanspeed);

169 170
	snprintf(ptr, len, "memory %dMHz%s%s%s%s\n", perflvl->memory / 1000,
		 c, s, v, f);
171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217
}

static ssize_t
nouveau_pm_get_perflvl_info(struct device *d,
			    struct device_attribute *a, char *buf)
{
	struct nouveau_pm_level *perflvl = (struct nouveau_pm_level *)a;
	char *ptr = buf;
	int len = PAGE_SIZE;

	snprintf(ptr, len, "%d: ", perflvl->id);
	ptr += strlen(buf);
	len -= strlen(buf);

	nouveau_pm_perflvl_info(perflvl, ptr, len);
	return strlen(buf);
}

static ssize_t
nouveau_pm_get_perflvl(struct device *d, struct device_attribute *a, char *buf)
{
        struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
	struct nouveau_pm_level cur;
	int len = PAGE_SIZE, ret;
	char *ptr = buf;

	if (!pm->cur)
		snprintf(ptr, len, "setting: boot\n");
	else if (pm->cur == &pm->boot)
		snprintf(ptr, len, "setting: boot\nc: ");
	else
		snprintf(ptr, len, "setting: static %d\nc: ", pm->cur->id);
	ptr += strlen(buf);
	len -= strlen(buf);

	ret = nouveau_pm_perflvl_get(dev, &cur);
	if (ret == 0)
		nouveau_pm_perflvl_info(&cur, ptr, len);
	return strlen(buf);
}

static ssize_t
nouveau_pm_set_perflvl(struct device *d, struct device_attribute *a,
		       const char *buf, size_t count)
{
218 219 220 221 222 223 224
        struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
	int ret;

	ret = nouveau_pm_profile_set(dev, buf);
	if (ret)
		return ret;
	return strlen(buf);
225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256
}

DEVICE_ATTR(performance_level, S_IRUGO | S_IWUSR,
	    nouveau_pm_get_perflvl, nouveau_pm_set_perflvl);

int
nouveau_pm_init(struct drm_device *dev)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
	struct device *d = &dev->pdev->dev;
	char info[256];
	int ret, i;

	nouveau_volt_init(dev);
	nouveau_perf_init(dev);

	NV_INFO(dev, "%d available performance level(s)\n", pm->nr_perflvl);
	for (i = 0; i < pm->nr_perflvl; i++) {
		nouveau_pm_perflvl_info(&pm->perflvl[i], info, sizeof(info));
		NV_INFO(dev, "%d: %s", pm->perflvl[i].id, info);
	}

	/* determine current ("boot") performance level */
	ret = nouveau_pm_perflvl_get(dev, &pm->boot);
	if (ret == 0) {
		pm->cur = &pm->boot;

		nouveau_pm_perflvl_info(&pm->boot, info, sizeof(info));
		NV_INFO(dev, "c: %s", info);
	}

257 258 259 260 261 262 263 264 265
	/* switch performance levels now if requested */
	if (nouveau_perflvl != NULL) {
		ret = nouveau_pm_profile_set(dev, nouveau_perflvl);
		if (ret) {
			NV_ERROR(dev, "error setting perflvl \"%s\": %d\n",
				 nouveau_perflvl, ret);
		}
	}

266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300
	/* initialise sysfs */
	ret = device_create_file(d, &dev_attr_performance_level);
	if (ret)
		return ret;

	for (i = 0; i < pm->nr_perflvl; i++) {
		struct nouveau_pm_level *perflvl = &pm->perflvl[i];

		perflvl->dev_attr.attr.name = perflvl->name;
		perflvl->dev_attr.attr.mode = S_IRUGO;
		perflvl->dev_attr.show = nouveau_pm_get_perflvl_info;
		perflvl->dev_attr.store = NULL;
		sysfs_attr_init(&perflvl->dev_attr.attr);

		ret = device_create_file(d, &perflvl->dev_attr);
		if (ret) {
			NV_ERROR(dev, "failed pervlvl %d sysfs: %d\n",
				 perflvl->id, i);
			perflvl->dev_attr.attr.name = NULL;
			nouveau_pm_fini(dev);
			return ret;
		}
	}

	return 0;
}

void
nouveau_pm_fini(struct drm_device *dev)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
	struct device *d = &dev->pdev->dev;
	int i;

301 302 303
	if (pm->cur != &pm->boot)
		nouveau_pm_perflvl_set(dev, &pm->boot);

304 305 306 307 308 309 310 311 312 313 314 315 316 317
	device_remove_file(d, &dev_attr_performance_level);
	for (i = 0; i < pm->nr_perflvl; i++) {
		struct nouveau_pm_level *pl = &pm->perflvl[i];

		if (!pl->dev_attr.attr.name)
			break;

		device_remove_file(d, &pl->dev_attr);
	}

	nouveau_perf_fini(dev);
	nouveau_volt_fini(dev);
}

318 319 320 321 322 323 324 325 326 327 328 329 330 331
void
nouveau_pm_resume(struct drm_device *dev)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
	struct nouveau_pm_level *perflvl;

	if (pm->cur == &pm->boot)
		return;

	perflvl = pm->cur;
	pm->cur = &pm->boot;
	nouveau_pm_perflvl_set(dev, perflvl);
}