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Commit 471115ab authored by Michal Kalderon's avatar Michal Kalderon Committed by David S. Miller
Browse files

qed: Fix maximum number of CQs for iWARP 



The maximum number of CQs supported is bound to the number
of connections supported, which differs between RoCE and iWARP.

This fixes a crash that occurred in iWARP when running 1000 sessions
using perftest.

Fixes: 67b40dcc ("qed: Implement iWARP initialization, teardown and qp operations")

Signed-off-by: default avatarMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: default avatarAriel Elior <Ariel.Elior@cavium.com>
Reviewed-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d1abfd0b

drivers/net/ethernet/qlogic/qed/qed_rdma.c

+6 −6
Original line number Diff line number Diff line
@@ -209,11 +209,11 @@ static int qed_rdma_alloc(struct qed_hwfn *p_hwfn, 
		goto free_pd_map;

	}



	/* Allocate bitmap for cq's. The maximum number of CQs is bounded to

	 * twice the number of QPs.

	/* Allocate bitmap for cq's. The maximum number of CQs is bound to

	 * the number of connections we support. (num_qps in iWARP or

	 * num_qps/2 in RoCE).

	 */

	rc = qed_rdma_bmap_alloc(p_hwfn, &p_rdma_info->cq_map,

				 p_rdma_info->num_qps * 2, "CQ");

	rc = qed_rdma_bmap_alloc(p_hwfn, &p_rdma_info->cq_map, num_cons, "CQ");

	if (rc) {

		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,

			   "Failed to allocate cq bitmap, rc = %d\n", rc);
@@ -222,10 +222,10 @@ static int qed_rdma_alloc(struct qed_hwfn *p_hwfn, 


	/* Allocate bitmap for toggle bit for cq icids

	 * We toggle the bit every time we create or resize cq for a given icid.

	 * The maximum number of CQs is bounded to  twice the number of QPs.

	 * Size needs to equal the size of the cq bmap.

	 */

	rc = qed_rdma_bmap_alloc(p_hwfn, &p_rdma_info->toggle_bits,

				 p_rdma_info->num_qps * 2, "Toggle");

				 num_cons, "Toggle");

	if (rc) {

		DP_VERBOSE(p_hwfn, QED_MSG_RDMA,

			   "Failed to allocate toogle bits, rc = %d\n", rc);