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[SCSI] scsi_transport_spi: Export host width and HBA id

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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>
This commit is contained in:
Hannes Reinecke 2011-06-30 02:19:57 +05:30 committed by James Bottomley
parent 6f8ac161b8
commit 0ac2377b61
1 changed files with 24 additions and 0 deletions
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24
drivers/scsi/scsi_transport_spi.c
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@ -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
};