netdev - [PATCH v1 for-next 1/3] net/ice: add support for DSCP QoS for IIDC

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Date:   Wed,  2 Feb 2022 13:19:19 -0600
From:   Shiraz Saleem <shiraz.saleem@...el.com>
To:     linux-rdma@...r.kernel.org, netdev@...r.kernel.org
Cc:     Dave Ertman <david.m.ertman@...el.com>,
        Shiraz Saleem <shiraz.saleem@...el.com>
Subject: [PATCH v1 for-next 1/3] net/ice: add support for DSCP QoS for IIDC

From: Dave Ertman <david.m.ertman@...el.com>

The ice driver provides QoS information to auxiliary drivers through
the exported function ice_get_qos_params. This function doesn't
currently support L3 DSCP QoS.

Add the necessary defines, structure elements and code to support DSCP
QoS through the IIDC functions.

Signed-off-by: Dave Ertman <david.m.ertman@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_idc.c | 5 +++++
 include/linux/net/intel/iidc.h           | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_idc.c b/drivers/net/ethernet/intel/ice/ice_idc.c
index fc35801..263a2e7 100644
--- a/drivers/net/ethernet/intel/ice/ice_idc.c
+++ b/drivers/net/ethernet/intel/ice/ice_idc.c
@@ -227,6 +227,11 @@ void ice_get_qos_params(struct ice_pf *pf, struct iidc_qos_params *qos)
 
 	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
 		qos->tc_info[i].rel_bw = dcbx_cfg->etscfg.tcbwtable[i];
+
+	qos->pfc_mode = dcbx_cfg->pfc_mode;
+	if (qos->pfc_mode == IIDC_DSCP_PFC_MODE)
+		for (i = 0; i < IIDC_MAX_DSCP_MAPPING; i++)
+			qos->dscp_map[i] = dcbx_cfg->dscp_map[i];
 }
 EXPORT_SYMBOL_GPL(ice_get_qos_params);
 
diff --git a/include/linux/net/intel/iidc.h b/include/linux/net/intel/iidc.h
index 1289593..dc474de 100644
--- a/include/linux/net/intel/iidc.h
+++ b/include/linux/net/intel/iidc.h
@@ -32,6 +32,8 @@ enum iidc_rdma_protocol {
 };
 
 #define IIDC_MAX_USER_PRIORITY		8
+#define IIDC_MAX_DSCP_MAPPING          64
+#define IIDC_DSCP_PFC_MODE             0x1
 
 /* Struct to hold per RDMA Qset info */
 struct iidc_rdma_qset_params {
@@ -60,6 +62,8 @@ struct iidc_qos_params {
 	u8 vport_relative_bw;
 	u8 vport_priority_type;
 	u8 num_tc;
+	u8 pfc_mode;
+	u8 dscp_map[IIDC_MAX_DSCP_MAPPING];
 };
 
 struct iidc_event {
-- 
1.8.3.1