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Subject[PATCH 2/2] cciss: add transport mode attribute to sys
From
Date
From: Joseph Handzik <joseph.t.handzik@beardog.cce.hp.com>

Signed-off-by: Joseph Handzik <joseph.t.handzik@beardog.cce.hp.com>
---
.../ABI/testing/sysfs-bus-pci-devices-cciss | 7 +++++++
drivers/block/cciss.c | 13 +++++++++++++
2 files changed, 20 insertions(+), 0 deletions(-)

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 @@ Description: Value of 1 indicates the controller can honor the reset_devices
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 ssize_t host_store_rescan(struct device *dev,
}
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 DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
static struct attribute *cciss_host_attrs[] = {
&dev_attr_rescan.attr,
&dev_attr_resettable.attr,
+ &dev_attr_transport_mode.attr,
NULL
};



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