RDMA/rxe: Add new RXE_READ_OR_WRITE_MASK

1) Replace (RXE_READ_MASK | RXE_WRITE_MASK) with RXE_READ_OR_WRITE_MASK.
2) Change (RXE_READ_MASK | RXE_WRITE_OR_SEND) to RXE_READ_OR_WRITE_MASK
   because we don't need to check RETH for RXE_SEND_MASK.

Link: https://lore.kernel.org/r/20210914080253.1145353-2-yangx.jy@fujitsu.com
Signed-off-by: Xiao Yang <yangx.jy@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/sw/rxe/rxe_opcode.h

@@ -84,6 +84,7 @@ enum rxe_hdr_mask {
 
 	RXE_READ_OR_ATOMIC	= (RXE_READ_MASK | RXE_ATOMIC_MASK),
 	RXE_WRITE_OR_SEND	= (RXE_WRITE_MASK | RXE_SEND_MASK),
+	RXE_READ_OR_WRITE_MASK	= (RXE_READ_MASK | RXE_WRITE_MASK),
 };
 
 #define OPCODE_NONE		(-1)

drivers/infiniband/sw/rxe/rxe_resp.c

@@ -413,7 +413,7 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
 	enum resp_states state;
 	int access;
 
-	if (pkt->mask & (RXE_READ_MASK | RXE_WRITE_MASK)) {
+	if (pkt->mask & RXE_READ_OR_WRITE_MASK) {
 		if (pkt->mask & RXE_RETH_MASK) {
 			qp->resp.va = reth_va(pkt);
 			qp->resp.offset = 0;
@@ -434,7 +434,7 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
 	}
 
 	/* A zero-byte op is not required to set an addr or rkey. */
-	if ((pkt->mask & (RXE_READ_MASK | RXE_WRITE_OR_SEND)) &&
+	if ((pkt->mask & RXE_READ_OR_WRITE_MASK) &&
 	    (pkt->mask & RXE_RETH_MASK) &&
 	    reth_len(pkt) == 0) {
 		return RESPST_EXECUTE;