cciss: add transport mode attribute to sys
Signed-off-by: Joseph Handzik <joseph.t.handzik@beardog.cce.hp.com>
Acked-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
index f5bb0a3..53d99ed 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
+++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
@@ -71,3 +71,10 @@
a dump device, as kdump requires resetting the device in order
to work reliably.
+Where: /sys/bus/pci/devices/<dev>/ccissX/transport_mode
+Date: July 2011
+Kernel Version: 3.0
+Contact: iss_storagedev@hp.com
+Description: Value of "simple" indicates that the controller has been placed
+ in "simple mode". Value of "performant" indicates that the
+ controller has been placed in "performant mode".
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 61f0b5b..6da7ede 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -641,6 +641,18 @@
}
static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
+static ssize_t host_show_transport_mode(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ctlr_info *h = to_hba(dev);
+
+ return snprintf(buf, 20, "%s\n",
+ h->transMethod & CFGTBL_Trans_Performant ?
+ "performant" : "simple");
+}
+static DEVICE_ATTR(transport_mode, S_IRUGO, host_show_transport_mode, NULL);
+
static ssize_t dev_show_unique_id(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -813,6 +825,7 @@
static struct attribute *cciss_host_attrs[] = {
&dev_attr_rescan.attr,
&dev_attr_resettable.attr,
+ &dev_attr_transport_mode.attr,
NULL
};