[SCSI] qdio: base support for hardware data router with zfcp

FICON Express8S supports hardware data router, which requires an
adapted qdio request format.
This part 1/2 provides the qdio base required for exploitation 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>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 15c97625df8d..cbbf7d831a33 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -46,6 +46,8 @@ struct qdesfmt0 {
         u32      : 16;
 } __attribute__ ((packed));
 
+#define QDR_AC_MULTI_BUFFER_ENABLE 0x01
+
 /**
  * struct qdr - queue description record (QDR)
  * @qfmt: queue format
@@ -222,6 +224,8 @@ struct slsb {
         u8 val[QDIO_MAX_BUFFERS_PER_Q];
 } __attribute__ ((packed, aligned(256)));
 
+#define CHSC_AC2_MULTI_BUFFER_AVAILABLE 0x0080
+#define CHSC_AC2_MULTI_BUFFER_ENABLED   0x0040
 #define CHSC_AC2_DATA_DIV_AVAILABLE     0x0010
 #define CHSC_AC2_DATA_DIV_ENABLED       0x0002
 
@@ -287,6 +291,7 @@ typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
 struct qdio_initialize {
         struct ccw_device *cdev;
         unsigned char q_format;
+        unsigned char qdr_ac;
         unsigned char adapter_name[8];
         unsigned int qib_param_field_format;
         unsigned char *qib_param_field;