RDMA/ocrdma: Increase the size of STAG array in dev structure to 16K

HW can support 16K STAG entries.  Change this max limit.  Also, move
this array out of ocrdma_dev to reduce the size of this structure.

Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Selvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/hw/ocrdma/ocrdma.h

@@ -236,7 +236,7 @@ struct ocrdma_dev {
 	struct list_head entry;
 	struct rcu_head rcu;
 	int id;
-	u64 stag_arr[OCRDMA_MAX_STAG];
+	u64 *stag_arr;
 	u8 sl; /* service level */
 	bool pfc_state;
 	atomic_t update_sl;

drivers/infiniband/hw/ocrdma/ocrdma_main.c

@@ -324,6 +324,11 @@ static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
 		if (!dev->qp_tbl)
 			goto alloc_err;
 	}
+
+	dev->stag_arr = kzalloc(sizeof(u64) * OCRDMA_MAX_STAG, GFP_KERNEL);
+	if (dev->stag_arr == NULL)
+		goto alloc_err;
+
 	spin_lock_init(&dev->av_tbl.lock);
 	spin_lock_init(&dev->flush_q_lock);
 	return 0;
@@ -334,6 +339,7 @@ alloc_err:
 
 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 {
+	kfree(dev->stag_arr);
 	kfree(dev->qp_tbl);
 	kfree(dev->cq_tbl);
 	kfree(dev->sgid_tbl);

drivers/infiniband/hw/ocrdma/ocrdma_sli.h

@@ -107,7 +107,7 @@ enum {
 
 #define OCRDMA_MAX_QP    2048
 #define OCRDMA_MAX_CQ    2048
-#define OCRDMA_MAX_STAG  8192
+#define OCRDMA_MAX_STAG 16384
 
 enum {
 	OCRDMA_DB_RQ_OFFSET		= 0xE0,