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/*
* 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 "nouveau_sysfs.h"
#include <core/object.h>
#include <core/class.h>
static inline struct drm_device *
drm_device(struct device *d)
{
return pci_get_drvdata(to_pci_dev(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 nv_control_pstate_info info;
size_t cnt = PAGE_SIZE;
char *buf = b;
int ret, i;
ret = nv_exec(sysfs->ctrl, NV_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 :
NV_CONTROL_PSTATE_ATTR_STATE_CURRENT;
struct nv_control_pstate_attr attr = {
.state = state,
.index = 0,
};
ret = nv_exec(sysfs->ctrl, NV_CONTROL_PSTATE_ATTR,
&attr, sizeof(attr));
if (ret)
return ret;
if (i < info.count)
snappendf(buf, cnt, "%02x:", attr.state);
else
snappendf(buf, cnt, "--:");
attr.index = 0;
do {
attr.state = state;
ret = nv_exec(sysfs->ctrl, NV_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 && info.pstate == state) ||
(state < 0 && info.ustate < 0))
snappendf(buf, cnt, " *");
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 nv_control_pstate_user args;
long value, ret;
char *tmp;
if ((tmp = strchr(buf, '\n')))
*tmp = '\0';
if (!strcasecmp(buf, "none"))
args.state = NV_CONTROL_PSTATE_USER_STATE_UNKNOWN;
else
if (!strcasecmp(buf, "auto"))
args.state = NV_CONTROL_PSTATE_USER_STATE_PERFMON;
else {
ret = kstrtol(buf, 16, &value);
if (ret)
return ret;
args.state = value;
}
ret = nv_exec(sysfs->ctrl, NV_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);
if (sysfs->ctrl) {
device_remove_file(&dev->pdev->dev, &dev_attr_pstate);
nouveau_object_del(nv_object(drm), NVDRM_DEVICE, NVDRM_CONTROL);
}
drm->sysfs = NULL;
kfree(sysfs);
}
int
nouveau_sysfs_init(struct drm_device *dev)
{
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_sysfs *sysfs;
int ret;
sysfs = drm->sysfs = kzalloc(sizeof(*sysfs), GFP_KERNEL);
if (!sysfs)
return -ENOMEM;
ret = nouveau_object_new(nv_object(drm), NVDRM_DEVICE, NVDRM_CONTROL,
NV_CONTROL_CLASS, NULL, 0, &sysfs->ctrl);
if (ret == 0)
device_create_file(&dev->pdev->dev, &dev_attr_pstate);
return 0;
}
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