[PATCH] IB/mthca: map context for RDMA responder in mem-free mode

Fix RDMA in mem-free mode: we need to make sure that the RDMA context memory
is mapped for the HCA.
Signed-off-by: NRoland Dreier <roland@topspin.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

drivers/infiniband/hw/mthca/mthca_dev.h

@@ -222,6 +222,7 @@ struct mthca_qp_table {
 	struct mthca_array     	qp;
 	struct mthca_icm_table *qp_table;
 	struct mthca_icm_table *eqp_table;
+	struct mthca_icm_table *rdb_table;
 };
 
 struct mthca_av_table {

drivers/infiniband/hw/mthca/mthca_main.c

@@ -430,14 +430,25 @@ static int __devinit mthca_init_icm(struct mthca_dev *mdev,
 		goto err_unmap_qp;
 	}
 
-	mdev->cq_table.table = mthca_alloc_icm_table(mdev, init_hca->cqc_base,
+	mdev->qp_table.rdb_table = mthca_alloc_icm_table(mdev, init_hca->rdb_base,
+							 MTHCA_RDB_ENTRY_SIZE,
+							 mdev->limits.num_qps <<
+							 mdev->qp_table.rdb_shift,
+							 0, 0);
+	if (!mdev->qp_table.rdb_table) {
+		mthca_err(mdev, "Failed to map RDB context memory, aborting\n");
+		err = -ENOMEM;
+		goto err_unmap_eqp;
+	}
+
+       mdev->cq_table.table = mthca_alloc_icm_table(mdev, init_hca->cqc_base,
 						     dev_lim->cqc_entry_sz,
 						     mdev->limits.num_cqs,
 						     mdev->limits.reserved_cqs, 0);
 	if (!mdev->cq_table.table) {
 		mthca_err(mdev, "Failed to map CQ context memory, aborting.\n");
 		err = -ENOMEM;
-		goto err_unmap_eqp;
+		goto err_unmap_rdb;
 	}
 
 	/*
@@ -463,6 +474,9 @@ static int __devinit mthca_init_icm(struct mthca_dev *mdev,
 err_unmap_cq:
 	mthca_free_icm_table(mdev, mdev->cq_table.table);
 
+err_unmap_rdb:
+	mthca_free_icm_table(mdev, mdev->qp_table.rdb_table);
+
 err_unmap_eqp:
 	mthca_free_icm_table(mdev, mdev->qp_table.eqp_table);
 

drivers/infiniband/hw/mthca/mthca_qp.c

@@ -1029,11 +1029,16 @@ static int mthca_alloc_memfree(struct mthca_dev *dev,
 		if (ret)
 			goto err_qpc;
 
+		ret = mthca_table_get(dev, dev->qp_table.rdb_table,
+				      qp->qpn << dev->qp_table.rdb_shift);
+		if (ret)
+			goto err_eqpc;
+
 		qp->rq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_RQ,
 						 qp->qpn, &qp->rq.db);
 		if (qp->rq.db_index < 0) {
 			ret = -ENOMEM;
-			goto err_eqpc;
+			goto err_rdb;
 		}
 
 		qp->sq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SQ,
@@ -1049,6 +1054,10 @@ static int mthca_alloc_memfree(struct mthca_dev *dev,
 err_rq_db:
 	mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
 
+err_rdb:
+	mthca_table_put(dev, dev->qp_table.rdb_table,
+			qp->qpn << dev->qp_table.rdb_shift);
+
 err_eqpc:
 	mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
 
@@ -1064,6 +1073,8 @@ static void mthca_free_memfree(struct mthca_dev *dev,
 	if (mthca_is_memfree(dev)) {
 		mthca_free_db(dev, MTHCA_DB_TYPE_SQ, qp->sq.db_index);
 		mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
+		mthca_table_put(dev, dev->qp_table.rdb_table,
+				qp->qpn << dev->qp_table.rdb_shift);
 		mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
 		mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn);
 	}