[PATCH net-next 07/20] net: ethernet: qualcomm: Add PPE port scheduler resource

[Luo Jie]

PPE port scheduler resource is used to dispatch the packet with
QoS offloaded to PPE hardware, which includes the hardware queue,
DRR(deficit round robin) and SP(strict priority).

Signed-off-by: Luo Jie <quic_luoj at quicinc.com>
---
 drivers/net/ethernet/qualcomm/ppe/ppe.c | 83 ++++++++++++++++++++++++-
 drivers/net/ethernet/qualcomm/ppe/ppe.h | 13 ++++
 2 files changed, 95 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qualcomm/ppe/ppe.c b/drivers/net/ethernet/qualcomm/ppe/ppe.c
index 85d8b06a326b..8bf32a7265d2 100644
--- a/drivers/net/ethernet/qualcomm/ppe/ppe.c
+++ b/drivers/net/ethernet/qualcomm/ppe/ppe.c
@@ -16,6 +16,7 @@
 #include "ppe.h"
 #include "ppe_regs.h"
 
+#define PPE_SCHEDULER_PORT_NUM		8
 static const char * const ppe_clock_name[PPE_CLK_MAX] = {
 	"cmn_ahb",
 	"cmn_sys",
@@ -112,6 +113,8 @@ static const char * const ppe_reset_name[PPE_RST_MAX] = {
 	"nss_port6_mac",
 };
 
+static struct ppe_scheduler_port_resource ppe_scheduler_res[PPE_SCHEDULER_PORT_NUM];
+
 int ppe_write(struct ppe_device *ppe_dev, u32 reg, unsigned int val)
 {
 	return regmap_write(ppe_dev->regmap, reg, val);
@@ -730,6 +733,80 @@ static int of_parse_ppe_tdm(struct ppe_device *ppe_dev,
 	return ret;
 };
 
+static int of_parse_ppe_scheduler_resource(struct ppe_device *ppe_dev,
+					   struct device_node *resource_node)
+{
+	struct device_node *port_node;
+	u32 port;
+
+	for_each_available_child_of_node(resource_node, port_node) {
+		if (of_property_read_u32(port_node, "port-id", &port))
+			return dev_err_probe(ppe_dev->dev, -ENODEV,
+					     "port-id not defined on resource\n");
+
+		if (port >= ARRAY_SIZE(ppe_scheduler_res))
+			return dev_err_probe(ppe_dev->dev, -EINVAL,
+					     "Invalid port-id defined on resource\n");
+
+		if (of_property_read_u32_array(port_node, "qcom,ucast-queue",
+					       ppe_scheduler_res[port].ucastq,
+					       ARRAY_SIZE(ppe_scheduler_res[port].ucastq)))
+			return dev_err_probe(ppe_dev->dev, -EINVAL,
+					     "Invalid qcom,ucast-queue defined on resource\n");
+
+		if (of_property_read_u32_array(port_node, "qcom,mcast-queue",
+					       ppe_scheduler_res[port].mcastq,
+					       ARRAY_SIZE(ppe_scheduler_res[port].mcastq)))
+			return dev_err_probe(ppe_dev->dev, -EINVAL,
+					     "Invalid qcom,mcast-queue defined on resource\n");
+
+		if (of_property_read_u32_array(port_node, "qcom,l0sp",
+					       ppe_scheduler_res[port].l0sp,
+					       ARRAY_SIZE(ppe_scheduler_res[port].l0sp)))
+			return dev_err_probe(ppe_dev->dev, -EINVAL,
+					     "Invalid qcom,l0sp defined on resource\n");
+
+		if (of_property_read_u32_array(port_node, "qcom,l0cdrr",
+					       ppe_scheduler_res[port].l0cdrr,
+					       ARRAY_SIZE(ppe_scheduler_res[port].l0cdrr)))
+			return dev_err_probe(ppe_dev->dev, -EINVAL,
+					     "Invalid qcom,l0cdrr defined on resource\n");
+
+		if (of_property_read_u32_array(port_node, "qcom,l0edrr",
+					       ppe_scheduler_res[port].l0edrr,
+					       ARRAY_SIZE(ppe_scheduler_res[port].l0edrr)))
+			return dev_err_probe(ppe_dev->dev, -EINVAL,
+					     "Invalid qcom,l0edrr defined on resource\n");
+
+		if (of_property_read_u32_array(port_node, "qcom,l1cdrr",
+					       ppe_scheduler_res[port].l1cdrr,
+					       ARRAY_SIZE(ppe_scheduler_res[port].l1cdrr)))
+			return dev_err_probe(ppe_dev->dev, -EINVAL,
+					     "Invalid qcom,l1cdrr defined on resource\n");
+
+		if (of_property_read_u32_array(port_node, "qcom,l1edrr",
+					       ppe_scheduler_res[port].l1edrr,
+					       ARRAY_SIZE(ppe_scheduler_res[port].l1edrr)))
+			return dev_err_probe(ppe_dev->dev, -EINVAL,
+					     "Invalid qcom,l1edrr defined on resource\n");
+	}
+
+	return 0;
+}
+
+static int of_parse_ppe_scheduler(struct ppe_device *ppe_dev,
+				  struct device_node *ppe_node)
+{
+	struct device_node *scheduler_node;
+
+	scheduler_node = of_get_child_by_name(ppe_node, "port-scheduler-resource");
+	if (!scheduler_node)
+		return dev_err_probe(ppe_dev->dev, -ENODEV,
+				     "port-scheduler-resource is not defined\n");
+
+	return of_parse_ppe_scheduler_resource(ppe_dev, scheduler_node);
+}
+
 static int of_parse_ppe_config(struct ppe_device *ppe_dev,
 			       struct device_node *ppe_node)
 {
@@ -743,7 +820,11 @@ static int of_parse_ppe_config(struct ppe_device *ppe_dev,
 	if (ret)
 		return ret;
 
-	return of_parse_ppe_tdm(ppe_dev, ppe_node);
+	ret = of_parse_ppe_tdm(ppe_dev, ppe_node);
+	if (ret)
+		return ret;
+
+	return of_parse_ppe_scheduler(ppe_dev, ppe_node);
 }
 
 static int qcom_ppe_probe(struct platform_device *pdev)
diff --git a/drivers/net/ethernet/qualcomm/ppe/ppe.h b/drivers/net/ethernet/qualcomm/ppe/ppe.h
index 6caef42ab235..84b1c9761f79 100644
--- a/drivers/net/ethernet/qualcomm/ppe/ppe.h
+++ b/drivers/net/ethernet/qualcomm/ppe/ppe.h
@@ -139,6 +139,19 @@ struct ppe_data {
 	struct reset_control *rst[PPE_RST_MAX];
 };
 
+/* PPE port QoS resource, which includes the queue range and
+ * DRR(deficit round robin), SP(strict priority).
+ */
+struct ppe_scheduler_port_resource {
+	int ucastq[2];
+	int mcastq[2];
+	int l0sp[2];
+	int l0cdrr[2];
+	int l0edrr[2];
+	int l1cdrr[2];
+	int l1edrr[2];
+};
+
 int ppe_type_get(struct ppe_device *ppe_dev);
 
 int ppe_write(struct ppe_device *ppe_dev, u32 reg, unsigned int val);
-- 
2.42.0