RDMA/rxe: Introduce rxe access supported flags

Introduce supported bit masks for setting the access attributes of MWs,
MRs, and QPs. Check these when attributes are set.

Link: https://lore.kernel.org/r/20230530221334.89432-5-rpearsonhpe@gmail.comSigned-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/sw/rxe/rxe_mw.c

@@ -197,6 +197,11 @@ int rxe_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
 		mr = NULL;
 	}
 
+	if (access & ~RXE_ACCESS_SUPPORTED_MW) {
+		rxe_err_mw(mw, "access %#x not supported", access);
+		return -EOPNOTSUPP;
+	}
+
 	spin_lock_bh(&mw->lock);
 
 	ret = rxe_check_bind_mw(qp, wqe, mw, mr, access);

drivers/infiniband/sw/rxe/rxe_qp.c

@@ -392,6 +392,13 @@ int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 	if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 		goto err1;
 
+	if (mask & IB_QP_ACCESS_FLAGS) {
+		if (!(qp_type(qp) == IB_QPT_RC || qp_type(qp) == IB_QPT_UC))
+			goto err1;
+		if (attr->qp_access_flags & ~RXE_ACCESS_SUPPORTED_QP)
+			goto err1;
+	}
+
 	if (mask & IB_QP_AV && rxe_av_chk_attr(qp, &attr->ah_attr))
 		goto err1;
 

drivers/infiniband/sw/rxe/rxe_verbs.c

@@ -1260,6 +1260,12 @@ static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, u64 start,
 	struct rxe_mr *mr;
 	int err, cleanup_err;
 
+	if (access & ~RXE_ACCESS_SUPPORTED_MR) {
+		rxe_err_pd(pd, "access = %#x not supported (%#x)", access,
+				RXE_ACCESS_SUPPORTED_MR);
+		return ERR_PTR(-EOPNOTSUPP);
+	}
+
 	mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 	if (!mr)
 		return ERR_PTR(-ENOMEM);

drivers/infiniband/sw/rxe/rxe_verbs.h

@@ -253,10 +253,19 @@ struct rxe_qp {
 	struct execute_work	cleanup_work;
 };
 
-enum rxe_access {
-	RXE_ACCESS_REMOTE	= (IB_ACCESS_REMOTE_READ
+enum {
+	RXE_ACCESS_REMOTE	= IB_ACCESS_REMOTE_READ
 				| IB_ACCESS_REMOTE_WRITE
-				| IB_ACCESS_REMOTE_ATOMIC),
+				| IB_ACCESS_REMOTE_ATOMIC,
+	RXE_ACCESS_SUPPORTED_MR	= RXE_ACCESS_REMOTE
+				| IB_ACCESS_LOCAL_WRITE
+				| IB_ACCESS_MW_BIND
+				| IB_ACCESS_ON_DEMAND
+				| IB_ACCESS_FLUSH_GLOBAL
+				| IB_ACCESS_FLUSH_PERSISTENT,
+	RXE_ACCESS_SUPPORTED_QP	= RXE_ACCESS_SUPPORTED_MR,
+	RXE_ACCESS_SUPPORTED_MW	= RXE_ACCESS_SUPPORTED_MR
+				| IB_ZERO_BASED,
 };
 
 enum rxe_mr_state {