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authorSwen Schillig <swen@vnet.ibm.com>2011-08-15 14:40:32 +0200
committerJames Bottomley <JBottomley@Parallels.com>2011-08-27 08:37:03 -0600
commit86a9668a8d29ea711613e1cb37efa68e7c4db564 (patch)
tree58a39ba842f928bd9629cfb8468322a96fe7459f /drivers/s390/scsi/zfcp_dbf.c
parentdfe5bb506172307e43287b8962348fb85801c0f4 (diff)
[SCSI] zfcp: support for hardware data router
FICON Express8S supports hardware data router, which requires an adapted qdio request format. This part 2/2 exploits the functionality in zfcp. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/s390/scsi/zfcp_dbf.c')
-rw-r--r--drivers/s390/scsi/zfcp_dbf.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index 96d1462e0bf5..967e7b70e977 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -163,6 +163,42 @@ void zfcp_dbf_hba_bit_err(char *tag, struct zfcp_fsf_req *req)
spin_unlock_irqrestore(&dbf->hba_lock, flags);
}
+/**
+ * zfcp_dbf_hba_def_err - trace event for deferred error messages
+ * @adapter: pointer to struct zfcp_adapter
+ * @req_id: request id which caused the deferred error message
+ * @scount: number of sbals incl. the signaling sbal
+ * @pl: array of all involved sbals
+ */
+void zfcp_dbf_hba_def_err(struct zfcp_adapter *adapter, u64 req_id, u16 scount,
+ void **pl)
+{
+ struct zfcp_dbf *dbf = adapter->dbf;
+ struct zfcp_dbf_pay *payload = &dbf->pay_buf;
+ unsigned long flags;
+ u16 length;
+
+ if (!pl)
+ return;
+
+ spin_lock_irqsave(&dbf->pay_lock, flags);
+ memset(payload, 0, sizeof(*payload));
+
+ memcpy(payload->area, "def_err", 7);
+ payload->fsf_req_id = req_id;
+ payload->counter = 0;
+ length = min((u16)sizeof(struct qdio_buffer),
+ (u16)ZFCP_DBF_PAY_MAX_REC);
+
+ while ((char *)pl[payload->counter] && payload->counter < scount) {
+ memcpy(payload->data, (char *)pl[payload->counter], length);
+ debug_event(dbf->pay, 1, payload, zfcp_dbf_plen(length));
+ payload->counter++;
+ }
+
+ spin_unlock_irqrestore(&dbf->pay_lock, flags);
+}
+
static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec,
struct zfcp_adapter *adapter,
struct zfcp_port *port,