[PATCH for-next 1/3][v2] qed: add get and set support for dscp priority

[Shai Malin <smalin@marvell.com>]

From: Prabhakar Kushwaha <pkushwaha@marvell.com>

This patch add support of get or set priority value for a given
dscp index.

Signed-off-by: Shai Malin <smalin@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: Prabhakar Kushwaha <pkushwaha@marvell.com>
---
Changes for v2:
	- incorporated Leon Romanovsky's comments

 drivers/net/ethernet/qlogic/qed/qed_dcbx.c | 64 ++++++++++++++++++++++
 drivers/net/ethernet/qlogic/qed/qed_dcbx.h |  9 +++
 include/linux/qed/qed_if.h                 |  6 ++
 3 files changed, 79 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
index e81dd34a3cac..f9254e0fd624 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
@@ -1280,6 +1280,70 @@ int qed_dcbx_get_config_params(struct qed_hwfn *p_hwfn,
 	return 0;
 }
 
+int qed_dcbx_get_dscp_priority(struct qed_hwfn *p_hwfn, u8 dscp_index,
+			       u8 *p_dscp_pri)
+{
+	struct qed_dcbx_get *p_dcbx_info;
+	int rc;
+
+	if (IS_VF(p_hwfn->cdev)) {
+		DP_ERR(p_hwfn->cdev,
+		       "qed rdma get dscp priority not supported for VF.\n");
+		return -EINVAL;
+	}
+
+	if (dscp_index >= QED_DCBX_DSCP_SIZE) {
+		DP_ERR(p_hwfn, "Invalid dscp index %d\n", dscp_index);
+		return -EINVAL;
+	}
+
+	p_dcbx_info = kzalloc(sizeof(*p_dcbx_info), GFP_KERNEL);
+	if (!p_dcbx_info)
+		return -ENOMEM;
+
+	rc = qed_dcbx_query_params(p_hwfn, p_dcbx_info,
+				   QED_DCBX_OPERATIONAL_MIB);
+	if (rc) {
+		kfree(p_dcbx_info);
+		return rc;
+	}
+
+	*p_dscp_pri = p_dcbx_info->dscp.dscp_pri_map[dscp_index];
+	kfree(p_dcbx_info);
+
+	return 0;
+}
+
+int qed_dcbx_set_dscp_priority(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
+			       u8 dscp_index, u8 pri_val)
+{
+	struct qed_dcbx_set dcbx_set;
+	int rc;
+
+	if (IS_VF(p_hwfn->cdev)) {
+		DP_ERR(p_hwfn->cdev,
+		       "qed rdma set dscp priority not supported for VF.\n");
+		return -EINVAL;
+	}
+
+	if (dscp_index >= QED_DCBX_DSCP_SIZE ||
+	    pri_val >= QED_MAX_PFC_PRIORITIES) {
+		DP_ERR(p_hwfn, "Invalid dscp params: index = %d pri = %d\n",
+		       dscp_index, pri_val);
+		return -EINVAL;
+	}
+
+	memset(&dcbx_set, 0, sizeof(dcbx_set));
+	rc = qed_dcbx_get_config_params(p_hwfn, &dcbx_set);
+	if (rc)
+		return rc;
+
+	dcbx_set.override_flags = QED_DCBX_OVERRIDE_DSCP_CFG;
+	dcbx_set.dscp.dscp_pri_map[dscp_index] = pri_val;
+
+	return qed_dcbx_config_params(p_hwfn, p_ptt, &dcbx_set, 1);
+}
+
 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 e1798925b444..6d8ce9bb30bd 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dcbx.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_dcbx.h
@@ -46,6 +46,7 @@ struct qed_dcbx_set {
 	bool enabled;
 	struct qed_dcbx_admin_params config;
 	u32 ver_num;
+	struct qed_dcbx_dscp_params dscp;
 };
 
 struct qed_dcbx_results {
@@ -100,6 +101,14 @@ void qed_dcbx_info_free(struct qed_hwfn *p_hwfn);
 void qed_dcbx_set_pf_update_params(struct qed_dcbx_results *p_src,
 				   struct pf_update_ramrod_data *p_dest);
 
+/* Returns priority value for a given dscp index */
+int qed_dcbx_get_dscp_priority(struct qed_hwfn *p_hwfn, u8 dscp_index,
+			       u8 *p_dscp_pri);
+
+/* Sets priority value for a given dscp index */
+int qed_dcbx_set_dscp_priority(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
+			       u8 dscp_index, u8 pri_val);
+
 #define QED_DCBX_DEFAULT_TC	0
 
 u8 qed_dcbx_get_priority_tc(struct qed_hwfn *p_hwfn, u8 pri);
diff --git a/include/linux/qed/qed_if.h b/include/linux/qed/qed_if.h
index 850b98991670..f7ce9a923d7c 100644
--- a/include/linux/qed/qed_if.h
+++ b/include/linux/qed/qed_if.h
@@ -124,12 +124,18 @@ struct qed_dcbx_operational_params {
 	u32 err;
 };
 
+struct qed_dcbx_dscp_params {
+	bool enabled;
+	u8 dscp_pri_map[QED_DCBX_DSCP_SIZE];
+};
+
 struct qed_dcbx_get {
 	struct qed_dcbx_operational_params operational;
 	struct qed_dcbx_lldp_remote lldp_remote;
 	struct qed_dcbx_lldp_local lldp_local;
 	struct qed_dcbx_remote_params remote;
 	struct qed_dcbx_admin_params local;
+	struct qed_dcbx_dscp_params dscp;
 };
 
 enum qed_nvm_images {
-- 
2.24.1