netdev - [PATCH net 1/3] qed: LL2 flush isles when connection is closed

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Message-ID: <20180516114440.5048-2-Michal.Kalderon@cavium.com>
Date:   Wed, 16 May 2018 14:44:38 +0300
From:   Michal Kalderon <Michal.Kalderon@...ium.com>
To:     <michal.kalderon@...ium.com>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <chad.dupuis@...ium.com>,
        Michal Kalderon <Michal.Kalderon@...ium.com>,
        Ariel Elior <Ariel.Elior@...ium.com>
Subject: [PATCH net 1/3] qed: LL2 flush isles when connection is closed

Driver should free all pending isles once it gets a FLUSH cqe from FW.
Part of iSCSI out of order flow.

Fixes: 1d6cff4fca4366 ("qed: Add iSCSI out of order packet handling")
Signed-off-by: Ariel Elior <Ariel.Elior@...ium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@...ium.com>
---
 drivers/net/ethernet/qlogic/qed/qed_ll2.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.c b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
index 3850281..b5918bd 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_ll2.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
@@ -591,6 +591,27 @@ static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
 	}
 }
 
+static bool
+qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn,
+				struct core_rx_slow_path_cqe *p_cqe)
+{
+	struct ooo_opaque *iscsi_ooo;
+	u32 cid;
+
+	if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
+		return false;
+
+	iscsi_ooo = (struct ooo_opaque *)&p_cqe->opaque_data;
+	if (iscsi_ooo->ooo_opcode != TCP_EVENT_DELETE_ISLES)
+		return false;
+
+	/* Need to make a flush */
+	cid = le32_to_cpu(iscsi_ooo->cid);
+	qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid);
+
+	return true;
+}
+
 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
 				  struct qed_ll2_info *p_ll2_conn)
 {
@@ -617,6 +638,11 @@ static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
 		cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
 		cqe_type = cqe->rx_cqe_sp.type;
 
+		if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
+			if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn,
+							    &cqe->rx_cqe_sp))
+				continue;
+
 		if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
 			DP_NOTICE(p_hwfn,
 				  "Got a non-regular LB LL2 completion [type 0x%02x]\n",
-- 
2.9.5