[PATCH v2] librte_sched: add post-init pipe profile api

[Jasvinder Singh <jasvinder.singh@intel.com>]

Add new API function to add more pipe configuration profiles
post initialization to the set of exisitng profiles specified during
the creation of scheduler port.

This API removes the current limitation that forces the user
to define the full set of pipe profiles as the part of port parameters
while port is being created.

Signed-off-by: Jasvinder Singh <jasvinder.singh@intel.com>
---
v2:
- remove duplicated parameter checks
- change api name to rte_sched_port_pipe_profile_add 

 lib/librte_sched/rte_sched.c           | 239 +++++++++++++++++++++------------
 lib/librte_sched/rte_sched.h           |  18 +++
 lib/librte_sched/rte_sched_version.map |   6 +
 3 files changed, 180 insertions(+), 83 deletions(-)

diff --git a/lib/librte_sched/rte_sched.c b/lib/librte_sched/rte_sched.c
index 634486c..8917f24 100644
--- a/lib/librte_sched/rte_sched.c
+++ b/lib/librte_sched/rte_sched.c
@@ -276,9 +276,54 @@ rte_sched_port_qsize(struct rte_sched_port *port, uint32_t qindex)
 }
 
 static int
+pipe_profile_check(struct rte_sched_pipe_params *params,
+	uint32_t rate)
+{
+	uint32_t i;
+
+	/* Pipe parameters */
+	if (params == NULL)
+		return -10;
+
+	/* TB rate: non-zero, not greater than port rate */
+	if (params->tb_rate == 0 ||
+		params->tb_rate > rate)
+		return -11;
+
+	/* TB size: non-zero */
+	if (params->tb_size == 0)
+		return -12;
+
+	/* TC rate: non-zero, less than pipe rate */
+	for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
+		if (params->tc_rate[i] == 0 ||
+			params->tc_rate[i] > params->tb_rate)
+			return -13;
+	}
+
+	/* TC period: non-zero */
+	if (params->tc_period == 0)
+		return -14;
+
+#ifdef RTE_SCHED_SUBPORT_TC_OV
+	/* TC3 oversubscription weight: non-zero */
+	if (params->tc_ov_weight == 0)
+		return -15;
+#endif
+
+	/* Queue WRR weights: non-zero */
+	for (i = 0; i < RTE_SCHED_QUEUES_PER_PIPE; i++) {
+		if (params->wrr_weights[i] == 0)
+			return -16;
+	}
+
+	return 0;
+}
+
+static int
 rte_sched_port_check_params(struct rte_sched_port_params *params)
 {
-	uint32_t i, j;
+	uint32_t i;
 
 	if (params == NULL)
 		return -1;
@@ -324,36 +369,11 @@ rte_sched_port_check_params(struct rte_sched_port_params *params)
 
 	for (i = 0; i < params->n_pipe_profiles; i++) {
 		struct rte_sched_pipe_params *p = params->pipe_profiles + i;
+		int status;
 
-		/* TB rate: non-zero, not greater than port rate */
-		if (p->tb_rate == 0 || p->tb_rate > params->rate)
-			return -10;
-
-		/* TB size: non-zero */
-		if (p->tb_size == 0)
-			return -11;
-
-		/* TC rate: non-zero, less than pipe rate */
-		for (j = 0; j < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; j++) {
-			if (p->tc_rate[j] == 0 || p->tc_rate[j] > p->tb_rate)
-				return -12;
-		}
-
-		/* TC period: non-zero */
-		if (p->tc_period == 0)
-			return -13;
-
-#ifdef RTE_SCHED_SUBPORT_TC_OV
-		/* TC3 oversubscription weight: non-zero */
-		if (p->tc_ov_weight == 0)
-			return -14;
-#endif
-
-		/* Queue WRR weights: non-zero */
-		for (j = 0; j < RTE_SCHED_QUEUES_PER_PIPE; j++) {
-			if (p->wrr_weights[j] == 0)
-				return -15;
-		}
+		status = pipe_profile_check(p, params->rate);
+		if (status != 0)
+			return status;
 	}
 
 	return 0;
@@ -514,69 +534,80 @@ rte_sched_time_ms_to_bytes(uint32_t time_ms, uint32_t rate)
 }
 
 static void
-rte_sched_port_config_pipe_profile_table(struct rte_sched_port *port, struct rte_sched_port_params *params)
+rte_sched_pipe_profile_convert(struct rte_sched_pipe_params *src,
+	struct rte_sched_pipe_profile *dst,
+	uint32_t rate)
 {
-	uint32_t i, j;
+	uint32_t i;
 
-	for (i = 0; i < port->n_pipe_profiles; i++) {
-		struct rte_sched_pipe_params *src = params->pipe_profiles + i;
-		struct rte_sched_pipe_profile *dst = port->pipe_profiles + i;
+	/* Token Bucket */
+	if (src->tb_rate == rate) {
+		dst->tb_credits_per_period = 1;
+		dst->tb_period = 1;
+	} else {
+		double tb_rate = (double) src->tb_rate
+				/ (double) rate;
+		double d = RTE_SCHED_TB_RATE_CONFIG_ERR;
 
-		/* Token Bucket */
-		if (src->tb_rate == params->rate) {
-			dst->tb_credits_per_period = 1;
-			dst->tb_period = 1;
-		} else {
-			double tb_rate = (double) src->tb_rate
-				/ (double) params->rate;
-			double d = RTE_SCHED_TB_RATE_CONFIG_ERR;
-
-			rte_approx(tb_rate, d,
-				   &dst->tb_credits_per_period, &dst->tb_period);
-		}
-		dst->tb_size = src->tb_size;
+		rte_approx(tb_rate, d,
+			&dst->tb_credits_per_period, &dst->tb_period);
+	}
+
+	dst->tb_size = src->tb_size;
 
-		/* Traffic Classes */
-		dst->tc_period = rte_sched_time_ms_to_bytes(src->tc_period,
-							    params->rate);
+	/* Traffic Classes */
+	dst->tc_period = rte_sched_time_ms_to_bytes(src->tc_period,
+						rate);
 
-		for (j = 0; j < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; j++)
-			dst->tc_credits_per_period[j]
-				= rte_sched_time_ms_to_bytes(src->tc_period,
-							     src->tc_rate[j]);
+	for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
+		dst->tc_credits_per_period[i]
+			= rte_sched_time_ms_to_bytes(src->tc_period,
+				src->tc_rate[i]);
 
 #ifdef RTE_SCHED_SUBPORT_TC_OV
-		dst->tc_ov_weight = src->tc_ov_weight;
+	dst->tc_ov_weight = src->tc_ov_weight;
 #endif
 
-		/* WRR */
-		for (j = 0; j < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; j++) {
-			uint32_t wrr_cost[RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS];
-			uint32_t lcd, lcd1, lcd2;
-			uint32_t qindex;
-
-			qindex = j * RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS;
-
-			wrr_cost[0] = src->wrr_weights[qindex];
-			wrr_cost[1] = src->wrr_weights[qindex + 1];
-			wrr_cost[2] = src->wrr_weights[qindex + 2];
-			wrr_cost[3] = src->wrr_weights[qindex + 3];
-
-			lcd1 = rte_get_lcd(wrr_cost[0], wrr_cost[1]);
-			lcd2 = rte_get_lcd(wrr_cost[2], wrr_cost[3]);
-			lcd = rte_get_lcd(lcd1, lcd2);
-
-			wrr_cost[0] = lcd / wrr_cost[0];
-			wrr_cost[1] = lcd / wrr_cost[1];
-			wrr_cost[2] = lcd / wrr_cost[2];
-			wrr_cost[3] = lcd / wrr_cost[3];
-
-			dst->wrr_cost[qindex] = (uint8_t) wrr_cost[0];
-			dst->wrr_cost[qindex + 1] = (uint8_t) wrr_cost[1];
-			dst->wrr_cost[qindex + 2] = (uint8_t) wrr_cost[2];
-			dst->wrr_cost[qindex + 3] = (uint8_t) wrr_cost[3];
-		}
+	/* WRR */
+	for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
+		uint32_t wrr_cost[RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS];
+		uint32_t lcd, lcd1, lcd2;
+		uint32_t qindex;
+
+		qindex = i * RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS;
+
+		wrr_cost[0] = src->wrr_weights[qindex];
+		wrr_cost[1] = src->wrr_weights[qindex + 1];
+		wrr_cost[2] = src->wrr_weights[qindex + 2];
+		wrr_cost[3] = src->wrr_weights[qindex + 3];
+
+		lcd1 = rte_get_lcd(wrr_cost[0], wrr_cost[1]);
+		lcd2 = rte_get_lcd(wrr_cost[2], wrr_cost[3]);
+		lcd = rte_get_lcd(lcd1, lcd2);
+
+		wrr_cost[0] = lcd / wrr_cost[0];
+		wrr_cost[1] = lcd / wrr_cost[1];
+		wrr_cost[2] = lcd / wrr_cost[2];
+		wrr_cost[3] = lcd / wrr_cost[3];
+
+		dst->wrr_cost[qindex] = (uint8_t) wrr_cost[0];
+		dst->wrr_cost[qindex + 1] = (uint8_t) wrr_cost[1];
+		dst->wrr_cost[qindex + 2] = (uint8_t) wrr_cost[2];
+		dst->wrr_cost[qindex + 3] = (uint8_t) wrr_cost[3];
+	}
+}
+
+static void
+rte_sched_port_config_pipe_profile_table(struct rte_sched_port *port,
+	struct rte_sched_port_params *params)
+{
+	uint32_t i;
+
+	for (i = 0; i < port->n_pipe_profiles; i++) {
+		struct rte_sched_pipe_params *src = params->pipe_profiles + i;
+		struct rte_sched_pipe_profile *dst = port->pipe_profiles + i;
 
+		rte_sched_pipe_profile_convert(src, dst, params->rate);
 		rte_sched_port_log_pipe_profile(port, i);
 	}
 
@@ -932,6 +963,48 @@ rte_sched_pipe_config(struct rte_sched_port *port,
 	return 0;
 }
 
+int
+rte_sched_port_pipe_profile_add(struct rte_sched_port *port,
+	struct rte_sched_pipe_params *params,
+	uint32_t *pipe_profile_id)
+{
+	struct rte_sched_pipe_profile *pp;
+	uint32_t i;
+	int status;
+
+	/* Port */
+	if (port == NULL)
+		return -1;
+
+	/* Pipe profiles not exceeds the max limit */
+	if (port->n_pipe_profiles >= RTE_SCHED_PIPE_PROFILES_PER_PORT)
+		return -2;
+
+	/* Pipe params */
+	status = pipe_profile_check(params, port->rate);
+	if (status != 0)
+		return status;
+
+	pp = &port->pipe_profiles[port->n_pipe_profiles];
+	rte_sched_pipe_profile_convert(params, pp, port->rate);
+
+	/* Pipe profile not exists */
+	for (i = 0; i < port->n_pipe_profiles; i++)
+		if (memcmp(port->pipe_profiles + i, pp, sizeof(*pp)) == 0)
+			return -3;
+
+	/* Pipe profile commit */
+	*pipe_profile_id = port->n_pipe_profiles;
+	port->n_pipe_profiles++;
+
+	if (port->pipe_tc3_rate_max < params->tc_rate[3])
+		port->pipe_tc3_rate_max = params->tc_rate[3];
+
+	rte_sched_port_log_pipe_profile(port, *pipe_profile_id);
+
+	return 0;
+}
+
 void
 rte_sched_port_pkt_write(struct rte_mbuf *pkt,
 			 uint32_t subport, uint32_t pipe, uint32_t traffic_class,
diff --git a/lib/librte_sched/rte_sched.h b/lib/librte_sched/rte_sched.h
index 5d2a688..b3d508f 100644
--- a/lib/librte_sched/rte_sched.h
+++ b/lib/librte_sched/rte_sched.h
@@ -57,6 +57,7 @@ extern "C" {
  */
 
 #include <sys/types.h>
+#include <rte_compat.h>
 #include <rte_mbuf.h>
 #include <rte_meter.h>
 
@@ -234,6 +235,23 @@ void
 rte_sched_port_free(struct rte_sched_port *port);
 
 /**
+ * Hierarchical scheduler pipe profile add
+ *
+ * @param port
+ *   Handle to port scheduler instance
+ * @param params
+ *   Pipe profile parameters
+ * @param pipe_profile_id
+ *   Set to valid profile id when profile is added successfully.
+ * @return
+ *   0 upon success, error code otherwise
+ */
+int __rte_experimental
+rte_sched_port_pipe_profile_add(struct rte_sched_port *port,
+	struct rte_sched_pipe_params *params,
+	uint32_t *pipe_profile_id);
+
+/**
  * Hierarchical scheduler subport configuration
  *
  * @param port
diff --git a/lib/librte_sched/rte_sched_version.map b/lib/librte_sched/rte_sched_version.map
index 3aa159a..1530af1 100644
--- a/lib/librte_sched/rte_sched_version.map
+++ b/lib/librte_sched/rte_sched_version.map
@@ -29,3 +29,9 @@ DPDK_2.1 {
 	rte_sched_port_pkt_read_color;
 
 } DPDK_2.0;
+
+EXPERIMENTAL {
+	global:
+
+	rte_sched_port_pipe_profile_add;
+} DPDK_2.1;
-- 
2.9.3