IB/hfi1: Add a function to receive TID RDMA ACK packet

This patch adds a function to receive TID RDMA ACK packet, which could
be an acknowledge to either a TID RDMA WRITE DATA packet or an TID
RDMA RESYNC packet. For an ACK to TID RDMA WRITE DATA packet, the
request segments are completed appropriately. For an ACK to a TID
RDMA RESYNC packet, any pending segment flow information is updated
accordingly.

Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hfi1/qp.h

@@ -65,6 +65,7 @@ extern const struct rvt_operation_params hfi1_post_parms[];
  * HFI1_S_WAIT_PIO_DRAIN - qp waiting for PIOs to drain
  * HFI1_S_WAIT_TID_SPACE - a QP is waiting for TID resource
  * HFI1_S_WAIT_TID_RESP - waiting for a TID RDMA WRITE response
+ * HFI1_S_WAIT_HALT - halt the first leg send engine
  * HFI1_S_MIN_BIT_MASK - the lowest bit that can be used by hfi1
  */
 #define HFI1_S_AHG_VALID         0x80000000
@@ -72,6 +73,7 @@ extern const struct rvt_operation_params hfi1_post_parms[];
 #define HFI1_S_WAIT_PIO_DRAIN    0x20000000
 #define HFI1_S_WAIT_TID_SPACE    0x10000000
 #define HFI1_S_WAIT_TID_RESP     0x08000000
+#define HFI1_S_WAIT_HALT         0x04000000
 #define HFI1_S_MIN_BIT_MASK      0x01000000
 
 /*