static void chp_release(struct device *dev)
{
struct channel_path *cp;
cp = to_channelpath(dev);
kfree(cp);
}
static ssize_t chp_status_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct channel_path *cp = to_channelpath(dev);
char cmd[10];
int num_args;
int error;
num_args = sscanf(buf, "%5s", cmd);
if (!num_args)
return count;
if (!strncasecmp(cmd, "on", 2) || !strcmp(cmd, "1")) {
mutex_lock(&cp->lock);
error = s390_vary_chpid(cp->chpid, 1);
mutex_unlock(&cp->lock);
} else if (!strncasecmp(cmd, "off", 3) || !strcmp(cmd, "0")) {
mutex_lock(&cp->lock);
error = s390_vary_chpid(cp->chpid, 0);
mutex_unlock(&cp->lock);
} else
error = -EINVAL;
return error < 0 ? error : count;
}
static ssize_t chp_type_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct channel_path *chp = to_channelpath(dev);
if (!chp)
return 0;
return sprintf(buf, "%x\n", chp->desc.desc);
}
/*
* Files for the channel path entries.
*/
static ssize_t chp_status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct channel_path *chp = to_channelpath(dev);
if (!chp)
return 0;
return (chp_get_status(chp->chpid) ? sprintf(buf, "online\n") :
sprintf(buf, "offline\n"));
}
static ssize_t chp_shared_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct channel_path *chp = to_channelpath(dev);
if (!chp)
return 0;
if (chp->shared == -1) /* channel measurements not available */
return sprintf(buf, "unknown\n");
return sprintf(buf, "%x\n", chp->shared);
}
static ssize_t chp_type_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct channel_path *chp = to_channelpath(dev);
u8 type;
mutex_lock(&chp->lock);
type = chp->desc.desc;
mutex_unlock(&chp->lock);
return sprintf(buf, "%x\n", type);
}
/*
* Files for the channel path entries.
*/
static ssize_t chp_status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct channel_path *chp = to_channelpath(dev);
int status;
mutex_lock(&chp->lock);
status = chp->state;
mutex_unlock(&chp->lock);
return status ? sprintf(buf, "online\n") : sprintf(buf, "offline\n");
}
static ssize_t chp_configure_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct channel_path *cp;
int status;
cp = to_channelpath(dev);
status = chp_info_get_status(cp->chpid);
if (status < 0)
return status;
return snprintf(buf, PAGE_SIZE, "%d\n", status);
}
static ssize_t chp_chid_external_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct channel_path *chp = to_channelpath(dev);
ssize_t rc;
mutex_lock(&chp->lock);
if (chp->desc_fmt1.flags & 0x10)
rc = sprintf(buf, "%x\n", chp->desc_fmt1.flags & 0x8 ? 1 : 0);
else
rc = 0;
mutex_unlock(&chp->lock);
return rc;
}
/*
* Channel measurement related functions
*/
static ssize_t chp_measurement_chars_read(struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct channel_path *chp;
struct device *device;
device = container_of(kobj, struct device, kobj);
chp = to_channelpath(device);
if (!chp->cmg_chars)
return 0;
return memory_read_from_buffer(buf, count, &off,
chp->cmg_chars, sizeof(struct cmg_chars));
}
static ssize_t chp_configure_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct channel_path *cp;
int val;
char delim;
if (sscanf(buf, "%d %c", &val, &delim) != 1)
return -EINVAL;
if (val != 0 && val != 1)
return -EINVAL;
cp = to_channelpath(dev);
chp_cfg_schedule(cp->chpid, val);
cfg_wait_idle();
return count;
}
static ssize_t chp_measurement_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct channel_path *chp;
struct channel_subsystem *css;
struct device *device;
unsigned int size;
device = container_of(kobj, struct device, kobj);
chp = to_channelpath(device);
css = to_css(chp->dev.parent);
size = sizeof(struct cmg_entry);
/* Only allow single reads. */
if (off || count < size)
return 0;
chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->chpid);
count = size;
return count;
}
