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authorSong Liu <songliubraving@fb.com>2014-12-31 01:46:18 +0300
committerChristoph Hellwig <hch@lst.de>2015-01-09 17:44:19 +0300
commit08024885a2a3ed432716e9d50046a620a5b2df05 (patch)
tree52e0042dac2c8651641987da49163908c3305e74 /drivers/misc
parent921ce7f5786052749a22a75780f5ce1a456bcdc6 (diff)
downloadlinux-08024885a2a3ed432716e9d50046a620a5b2df05.tar.xz
ses: Add power_status to SES device slot
Add power_status to SES device slot, so we can power on/off the HDDs behind the enclosure. Check firmware status in ses_set_* before sending control pages to firmware. Signed-off-by: Song Liu <songliubraving@fb.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Jens Axboe <axboe@fb.com> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/enclosure.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c
index b62314d627ae..38552a31304a 100644
--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -148,6 +148,7 @@ enclosure_register(struct device *dev, const char *name, int components,
for (i = 0; i < components; i++) {
edev->component[i].number = -1;
edev->component[i].slot = -1;
+ edev->component[i].power_status = 1;
}
mutex_lock(&container_list_lock);
@@ -583,6 +584,40 @@ static ssize_t set_component_locate(struct device *cdev,
return count;
}
+static ssize_t get_component_power_status(struct device *cdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct enclosure_device *edev = to_enclosure_device(cdev->parent);
+ struct enclosure_component *ecomp = to_enclosure_component(cdev);
+
+ if (edev->cb->get_power_status)
+ edev->cb->get_power_status(edev, ecomp);
+ return snprintf(buf, 40, "%s\n", ecomp->power_status ? "on" : "off");
+}
+
+static ssize_t set_component_power_status(struct device *cdev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct enclosure_device *edev = to_enclosure_device(cdev->parent);
+ struct enclosure_component *ecomp = to_enclosure_component(cdev);
+ int val;
+
+ if (strncmp(buf, "on", 2) == 0 &&
+ (buf[2] == '\n' || buf[2] == '\0'))
+ val = 1;
+ else if (strncmp(buf, "off", 3) == 0 &&
+ (buf[3] == '\n' || buf[3] == '\0'))
+ val = 0;
+ else
+ return -EINVAL;
+
+ if (edev->cb->set_power_status)
+ edev->cb->set_power_status(edev, ecomp, val);
+ return count;
+}
+
static ssize_t get_component_type(struct device *cdev,
struct device_attribute *attr, char *buf)
{
@@ -614,6 +649,8 @@ static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
set_component_active);
static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
set_component_locate);
+static DEVICE_ATTR(power_status, S_IRUGO | S_IWUSR, get_component_power_status,
+ set_component_power_status);
static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL);
static DEVICE_ATTR(slot, S_IRUGO, get_component_slot, NULL);
@@ -622,6 +659,7 @@ static struct attribute *enclosure_component_attrs[] = {
&dev_attr_status.attr,
&dev_attr_active.attr,
&dev_attr_locate.attr,
+ &dev_attr_power_status.attr,
&dev_attr_type.attr,
&dev_attr_slot.attr,
NULL