[S390] cio: obtain mdc value per channel path
Add support to accumulate the number of 64K-bytes blocks all paths
to a device at least support for a transport command.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 1aaddea..0689fcf 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -695,6 +695,25 @@
return ret;
}
+int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
+ struct channel_path_desc_fmt1 *desc)
+{
+ struct chsc_response_struct *chsc_resp;
+ struct chsc_scpd *scpd_area;
+ int ret;
+
+ spin_lock_irq(&chsc_page_lock);
+ scpd_area = chsc_page;
+ ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area);
+ if (ret)
+ goto out;
+ chsc_resp = (void *)&scpd_area->response;
+ memcpy(desc, &chsc_resp->data, sizeof(*desc));
+out:
+ spin_unlock_irq(&chsc_page_lock);
+ return ret;
+}
+
static void
chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
struct cmg_chars *chars)