From 7c1e36a10fd772dc29df94bf937d79692aa60eb0 Mon Sep 17 00:00:00 2001
From: Bogdan Purcareata <bogdan.purcareata@nxp.com>
Date: Mon, 28 Aug 2017 08:10:13 +0000
Subject: staging: fsl-dpaa2/eth: Add dpni_get_congestion_notif API

Signed-off-by: Bogdan Purcareata <bogdan.purcareata@nxp.com>

diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpni-cmd.h b/drivers/staging/fsl-dpaa2/ethernet/dpni-cmd.h
index 3a40872..29f44df 100644
--- a/drivers/staging/fsl-dpaa2/ethernet/dpni-cmd.h
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpni-cmd.h
@@ -632,4 +632,27 @@ struct dpni_cmd_set_congestion_notification {
 	u32 threshold_exit;
 };
 
+struct dpni_cmd_get_congestion_notification {
+	/* cmd word 0 */
+	u8 qtype;
+	u8 tc;
+};
+
+struct dpni_rsp_get_congestion_notification {
+	/* cmd word 0 */
+	u64 pad;
+	/* cmd word 1 */
+	u32 dest_id;
+	u16 notification_mode;
+	u8 dest_priority;
+	/* from LSB: dest_type: 4 units:2 */
+	u8 type_units;
+	/* cmd word 2 */
+	u64 message_iova;
+	/* cmd word 3 */
+	u64 message_ctx;
+	/* cmd word 4 */
+	u32 threshold_entry;
+	u32 threshold_exit;
+};
 #endif /* _FSL_DPNI_CMD_H */
diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpni.c b/drivers/staging/fsl-dpaa2/ethernet/dpni.c
index 003ed19..5c15ece 100644
--- a/drivers/staging/fsl-dpaa2/ethernet/dpni.c
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpni.c
@@ -1577,6 +1577,60 @@ int dpni_set_congestion_notification(struct fsl_mc_io *mc_io,
 }
 
 /**
+ * dpni_get_congestion_notification() - Get traffic class congestion
+ *	notification configuration
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPNI object
+ * @qtype:	Type of queue - Rx, Tx and Tx confirm types are supported
+ * @tc_id:	Traffic class selection (0-7)
+ * @cfg:	congestion notification configuration
+ *
+ * Return:	'0' on Success; error code otherwise.
+ */
+int dpni_get_congestion_notification(
+			struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			enum dpni_queue_type qtype,
+			u8 tc_id,
+			struct dpni_congestion_notification_cfg *cfg)
+{
+	struct dpni_rsp_get_congestion_notification *rsp_params;
+	struct dpni_cmd_get_congestion_notification *cmd_params;
+	struct mc_command cmd = { 0 };
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(
+				DPNI_CMDID_GET_CONGESTION_NOTIFICATION,
+				cmd_flags,
+				token);
+	cmd_params = (struct dpni_cmd_get_congestion_notification *)cmd.params;
+	cmd_params->qtype = qtype;
+	cmd_params->tc = tc_id;
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	rsp_params = (struct dpni_rsp_get_congestion_notification *)cmd.params;
+	cfg->units = dpni_get_field(rsp_params->type_units, CONG_UNITS);
+	cfg->threshold_entry = le32_to_cpu(rsp_params->threshold_entry);
+	cfg->threshold_exit = le32_to_cpu(rsp_params->threshold_exit);
+	cfg->message_ctx = le64_to_cpu(rsp_params->message_ctx);
+	cfg->message_iova = le64_to_cpu(rsp_params->message_iova);
+	cfg->notification_mode = le16_to_cpu(rsp_params->notification_mode);
+	cfg->dest_cfg.dest_id = le32_to_cpu(rsp_params->dest_id);
+	cfg->dest_cfg.priority = rsp_params->dest_priority;
+	cfg->dest_cfg.dest_type = dpni_get_field(rsp_params->type_units,
+						 DEST_TYPE);
+
+	return 0;
+}
+
+/**
  * dpni_set_queue() - Set queue parameters
  * @mc_io:	Pointer to MC portal's I/O object
  * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpni.h b/drivers/staging/fsl-dpaa2/ethernet/dpni.h
index a04144f..40128ed 100644
--- a/drivers/staging/fsl-dpaa2/ethernet/dpni.h
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpni.h
@@ -923,6 +923,14 @@ int dpni_set_congestion_notification(struct fsl_mc_io *mc_io,
 			u8 tc_id,
 			const struct dpni_congestion_notification_cfg *cfg);
 
+int dpni_get_congestion_notification(
+			struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			enum dpni_queue_type qtype,
+			u8 tc_id,
+			struct dpni_congestion_notification_cfg *cfg);
+
 /**
  * struct dpni_taildrop - Structure representing the taildrop
  * @enable:	Indicates whether the taildrop is active or not.
-- 
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