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drm/nouveau/debugfs: add copy of sysfs pstate interface ported to debugfs

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Signed-off-by: Karol Herbst <nouveau@karolherbst.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Karol Herbst 2015-07-30 11:53:31 +02:00 committed by Ben Skeggs
parent b126a200e9
commit 6e9fc17739
1 changed files with 138 additions and 2 deletions
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140
drivers/gpu/drm/nouveau/nouveau_debugfs.c
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@ -30,6 +30,7 @@
#include <linux/debugfs.h>
#include <nvif/class.h>
#include <nvif/if0001.h>
#include "nouveau_debugfs.h"
#include "nouveau_drm.h"
@ -45,6 +46,140 @@ nouveau_debugfs_vbios_image(struct seq_file *m, void *data)
return 0;
}
static int
nouveau_debugfs_pstate_get(struct seq_file *m, void *data)
{
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct nouveau_debugfs *debugfs = nouveau_debugfs(node->minor->dev);
struct nvif_object *ctrl = &debugfs->ctrl;
struct nvif_control_pstate_info_v0 info = {};
int ret, i;
if (!debugfs)
return -ENODEV;
ret = nvif_mthd(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(ctrl, NVIF_CONTROL_PSTATE_ATTR,
&attr, sizeof(attr));
if (ret)
return ret;
if (i < info.count)
seq_printf(m, "%02x:", attr.state);
else
seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" :
info.pwrsrc == 1 ? "AC" : "--");
attr.index = 0;
do {
attr.state = state;
ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
&attr, sizeof(attr));
if (ret)
return ret;
seq_printf(m, " %s %d", attr.name, attr.min);
if (attr.min != attr.max)
seq_printf(m, "-%d", attr.max);
seq_printf(m, " %s", attr.unit);
} while (attr.index);
if (state >= 0) {
if (info.ustate_ac == state)
seq_printf(m, " AC");
if (info.ustate_dc == state)
seq_printf(m, " DC");
if (info.pstate == state)
seq_printf(m, " *");
} else {
if (info.ustate_ac < -1)
seq_printf(m, " AC");
if (info.ustate_dc < -1)
seq_printf(m, " DC");
}
seq_printf(m, "\n");
}
return 0;
}
static ssize_t
nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf,
size_t len, loff_t *offp)
{
struct seq_file *m = file->private_data;
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct nouveau_debugfs *debugfs = nouveau_debugfs(node->minor->dev);
struct nvif_object *ctrl = &debugfs->ctrl;
struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL };
char buf[32] = {}, *tmp, *cur = buf;
long value, ret;
if (!debugfs)
return -ENODEV;
if (len >= sizeof(buf))
return -EINVAL;
if (copy_from_user(buf, ubuf, len))
return -EFAULT;
if ((tmp = strchr(buf, '\n')))
*tmp = '\0';
if (!strncasecmp(cur, "dc:", 3)) {
args.pwrsrc = 0;
cur += 3;
} else
if (!strncasecmp(cur, "ac:", 3)) {
args.pwrsrc = 1;
cur += 3;
}
if (!strcasecmp(cur, "none"))
args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN;
else
if (!strcasecmp(cur, "auto"))
args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON;
else {
ret = kstrtol(cur, 16, &value);
if (ret)
return ret;
args.ustate = value;
}
ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args));
if (ret < 0)
return ret;
return len;
}
static int
nouveau_debugfs_pstate_open(struct inode *inode, struct file *file)
{
return single_open(file, nouveau_debugfs_pstate_get, inode->i_private);
}
static const struct file_operations nouveau_pstate_fops = {
.owner = THIS_MODULE,
.open = nouveau_debugfs_pstate_open,
.read = seq_read,
.write = nouveau_debugfs_pstate_set,
};
static struct drm_info_list nouveau_debugfs_list[] = {
{ "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
};
@ -53,8 +188,9 @@ static struct drm_info_list nouveau_debugfs_list[] = {
static const struct nouveau_debugfs_files {
const char *name;
const struct file_operations *fops;
} nouveau_debugfs_files[] = {};
} nouveau_debugfs_files[] = {
{"pstate", &nouveau_pstate_fops},
};
static int
nouveau_debugfs_create_file(struct drm_minor *minor,