+++ /dev/null
-/*
- * Copyright 2013 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 <bskeggs@redhat.com>
- */
-
-#include <nvif/os.h>
-#include <nvif/class.h>
-#include <nvif/if0001.h>
-#include <nvif/ioctl.h>
-
-#include "nouveau_sysfs.h"
-
-MODULE_PARM_DESC(pstate, "enable sysfs pstate file, which will be moved in the future");
-int nouveau_pstate;
-module_param_named(pstate, nouveau_pstate, int, 0400);
-
-static inline struct drm_device *
-drm_device(struct device *d)
-{
- return dev_get_drvdata(d);
-}
-
-#define snappendf(p,r,f,a...) do { \
- snprintf(p, r, f, ##a); \
- r -= strlen(p); \
- p += strlen(p); \
-} while(0)
-
-static ssize_t
-nouveau_sysfs_pstate_get(struct device *d, struct device_attribute *a, char *b)
-{
- struct nouveau_sysfs *sysfs = nouveau_sysfs(drm_device(d));
- struct nvif_control_pstate_info_v0 info = {};
- size_t cnt = PAGE_SIZE;
- char *buf = b;
- int ret, i;
-
- ret = nvif_mthd(&sysfs->ctrl, NVIF_CONTROL_PSTATE_INFO,
- &info, sizeof(info));
- if (ret)
- return ret;
-
- for (i = 0; i < info.count + 1; i++) {
- const s32 state = i < info.count ? i :
- NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT;
- struct nvif_control_pstate_attr_v0 attr = {
- .state = state,
- .index = 0,
- };
-
- ret = nvif_mthd(&sysfs->ctrl, NVIF_CONTROL_PSTATE_ATTR,
- &attr, sizeof(attr));
- if (ret)
- return ret;
-
- if (i < info.count)
- snappendf(buf, cnt, "%02x:", attr.state);
- else
- snappendf(buf, cnt, "%s:", info.pwrsrc == 0 ? "DC" :
- info.pwrsrc == 1 ? "AC" :
- "--");
-
- attr.index = 0;
- do {
- attr.state = state;
- ret = nvif_mthd(&sysfs->ctrl,
- NVIF_CONTROL_PSTATE_ATTR,
- &attr, sizeof(attr));
- if (ret)
- return ret;
-
- snappendf(buf, cnt, " %s %d", attr.name, attr.min);
- if (attr.min != attr.max)
- snappendf(buf, cnt, "-%d", attr.max);
- snappendf(buf, cnt, " %s", attr.unit);
- } while (attr.index);
-
- if (state >= 0) {
- if (info.ustate_ac == state)
- snappendf(buf, cnt, " AC");
- if (info.ustate_dc == state)
- snappendf(buf, cnt, " DC");
- if (info.pstate == state)
- snappendf(buf, cnt, " *");
- } else {
- if (info.ustate_ac < -1)
- snappendf(buf, cnt, " AC");
- if (info.ustate_dc < -1)
- snappendf(buf, cnt, " DC");
- }
-
- snappendf(buf, cnt, "\n");
- }
-
- return strlen(b);
-}
-
-static ssize_t
-nouveau_sysfs_pstate_set(struct device *d, struct device_attribute *a,
- const char *buf, size_t count)
-{
- struct nouveau_sysfs *sysfs = nouveau_sysfs(drm_device(d));
- struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL };
- long value, ret;
- char *tmp;
-
- if ((tmp = strchr(buf, '\n')))
- *tmp = '\0';
-
- if (!strncasecmp(buf, "dc:", 3)) {
- args.pwrsrc = 0;
- buf += 3;
- } else
- if (!strncasecmp(buf, "ac:", 3)) {
- args.pwrsrc = 1;
- buf += 3;
- }
-
- if (!strcasecmp(buf, "none"))
- args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN;
- else
- if (!strcasecmp(buf, "auto"))
- args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON;
- else {
- ret = kstrtol(buf, 16, &value);
- if (ret)
- return ret;
- args.ustate = value;
- }
-
- ret = nvif_mthd(&sysfs->ctrl, NVIF_CONTROL_PSTATE_USER,
- &args, sizeof(args));
- if (ret < 0)
- return ret;
-
- return count;
-}
-
-static DEVICE_ATTR(pstate, S_IRUGO | S_IWUSR,
- nouveau_sysfs_pstate_get, nouveau_sysfs_pstate_set);
-
-void
-nouveau_sysfs_fini(struct drm_device *dev)
-{
- struct nouveau_sysfs *sysfs = nouveau_sysfs(dev);
- struct nouveau_drm *drm = nouveau_drm(dev);
- struct nvif_device *device = &drm->device;
-
- if (sysfs && sysfs->ctrl.priv) {
- device_remove_file(nvxx_device(device)->dev, &dev_attr_pstate);
- nvif_object_fini(&sysfs->ctrl);
- }
-
- drm->sysfs = NULL;
- kfree(sysfs);
-}
-
-int
-nouveau_sysfs_init(struct drm_device *dev)
-{
- struct nouveau_drm *drm = nouveau_drm(dev);
- struct nvif_device *device = &drm->device;
- struct nouveau_sysfs *sysfs;
- int ret;
-
- if (!nouveau_pstate)
- return 0;
-
- sysfs = drm->sysfs = kzalloc(sizeof(*sysfs), GFP_KERNEL);
- if (!sysfs)
- return -ENOMEM;
-
- ret = nvif_object_init(&device->object, 0, NVIF_CLASS_CONTROL,
- NULL, 0, &sysfs->ctrl);
- if (ret == 0)
- device_create_file(nvxx_device(device)->dev, &dev_attr_pstate);
-
- return 0;
-}
projects / cascardo / linux.git / commitdiff