[SCSI] zfcp: Introduce experimental support for DIF/DIX

Introduce support for DIF/DIX in zfcp: Report the capabilities for the
Scsi_host, map the protection data when issuing I/O requests and
handle the new error codes. Also add the fsf data_direction field to
the hba trace, it is useful information for debugging in that area.
This is an EXPERIMENTAL feature for now.

Signed-off-by: Felix Beck <felix.beck@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index a08d33a96ec9..a86117b0d6e1 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -155,6 +155,8 @@ void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
                 if (scsi_cmnd) {
                         response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
                         response->u.fcp.serial = scsi_cmnd->serial_number;
+                        response->u.fcp.data_dir =
+                                qtcb->bottom.io.data_direction;
                 }
                 break;
 
@@ -326,6 +328,7 @@ static void zfcp_dbf_hba_view_response(char **p,
         case FSF_QTCB_FCP_CMND:
                 if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
                         break;
+                zfcp_dbf_out(p, "data_direction", "0x%04x", r->u.fcp.data_dir);
                 zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
                 zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
                 *p += sprintf(*p, "\n");