netdev - [PATCH net-next 1/3] qed: Add DCBX API

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Date:   Tue, 31 Jul 2018 10:26:06 +0300
From:   Denis Bolotin <denis.bolotin@...ium.com>
To:     <davem@...emloft.net>, <netdev@...r.kernel.org>
CC:     Denis Bolotin <denis.bolotin@...ium.com>,
        Ariel Elior <ariel.elior@...ium.com>
Subject: [PATCH net-next 1/3] qed: Add DCBX API - qed_dcbx_get_priority_tc()

The API receives a priority and looks for the TC it is mapped to in the
operational DCBX configuration.

Signed-off-by: Denis Bolotin <denis.bolotin@...ium.com>
Signed-off-by: Ariel Elior <ariel.elior@...ium.com>
---
 drivers/net/ethernet/qlogic/qed/qed_dcbx.c | 27 +++++++++++++++++++++++++++
 drivers/net/ethernet/qlogic/qed/qed_dcbx.h |  2 ++
 2 files changed, 29 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
index 12b4c2a..00891cc 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
@@ -1277,6 +1277,33 @@ int qed_dcbx_get_config_params(struct qed_hwfn *p_hwfn,
 	return 0;
 }
 
+int qed_dcbx_get_priority_tc(struct qed_hwfn *p_hwfn, u8 pri, u8 *p_tc)
+{
+	struct qed_dcbx_get *dcbx_info;
+	int rc;
+
+	if (pri >= QED_MAX_PFC_PRIORITIES) {
+		DP_ERR(p_hwfn, "Invalid priority %d\n", pri);
+		return -EINVAL;
+	}
+
+	dcbx_info = kzalloc(sizeof(*dcbx_info), GFP_KERNEL);
+	if (!dcbx_info)
+		return -ENOMEM;
+
+	rc = qed_dcbx_query_params(p_hwfn, dcbx_info,
+				   QED_DCBX_OPERATIONAL_MIB);
+	if (rc) {
+		kfree(dcbx_info);
+		return rc;
+	}
+
+	*p_tc = dcbx_info->operational.params.ets_pri_tc_tbl[pri];
+	kfree(dcbx_info);
+
+	return 0;
+}
+
 static struct qed_dcbx_get *qed_dcbnl_get_dcbx(struct qed_hwfn *hwfn,
 					       enum qed_mib_read_type type)
 {
diff --git a/drivers/net/ethernet/qlogic/qed/qed_dcbx.h b/drivers/net/ethernet/qlogic/qed/qed_dcbx.h
index 5feb90e..9425d55 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dcbx.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_dcbx.h
@@ -111,6 +111,8 @@ struct qed_dcbx_mib_meta_data {
 
 int qed_dcbx_config_params(struct qed_hwfn *,
 			   struct qed_ptt *, struct qed_dcbx_set *, bool);
+
+int qed_dcbx_get_priority_tc(struct qed_hwfn *p_hwfn, u8 pri, u8 *p_tc);
 #endif
 
 /* QED local interface routines */
-- 
1.8.3.1