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authorHannes Reinecke <hare@suse.de>2011-06-30 02:19:57 +0530
committerJames Bottomley <JBottomley@Parallels.com>2011-07-26 13:53:50 +0400
commit0ac2377b61089e160d8e13b03cfdec89572cd741 (patch)
treecdb6bdaaf95901cb5bdbd4196917d1a7e73ca479 /drivers
parent6f8ac161b8b3332a9d96d6650ed3bae81baab30b (diff)
[SCSI] scsi_transport_spi: Export host width and HBA id
Currently it's impossible to find out if the host supports wide SCSI unless you're committed to trawl through syslog. And it's near impossible to find the actual HBA id, which is settable for some SCSI HBAs (like aic7xxx). So export them via sysfs. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Ankit Jain <jankit@suse.de> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/scsi_transport_spi.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 8a172d4f456..5fbeadd9681 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -597,6 +597,28 @@ static DEVICE_ATTR(signalling, S_IRUGO,
show_spi_host_signalling,
store_spi_host_signalling);
+static ssize_t show_spi_host_width(struct device *cdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+
+ return sprintf(buf, "%s\n", shost->max_id == 16 ? "wide" : "narrow");
+}
+static DEVICE_ATTR(host_width, S_IRUGO,
+ show_spi_host_width, NULL);
+
+static ssize_t show_spi_host_hba_id(struct device *cdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+
+ return sprintf(buf, "%d\n", shost->this_id);
+}
+static DEVICE_ATTR(hba_id, S_IRUGO,
+ show_spi_host_hba_id, NULL);
+
#define DV_SET(x, y) \
if(i->f->set_##x) \
i->f->set_##x(sdev->sdev_target, y)
@@ -1380,6 +1402,8 @@ static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class,
static struct attribute *host_attributes[] = {
&dev_attr_signalling.attr,
+ &dev_attr_host_width.attr,
+ &dev_attr_hba_id.attr,
NULL
};