Loading...
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 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 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 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 | /*
* 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;
}
|