From: Balasubramanian Manoharan <bala.manoha...@linaro.org>
Signed-off-by: Balasubramanian Manoharan <bala.manoha...@linaro.org>
---
/** Email created from pull request 172 (bala-manoharan:random_early_discard)
** https://github.com/Linaro/odp/pull/172
** Patch: https://github.com/Linaro/odp/pull/172.patch
** Base sha: 7fa8e2c97ed18f8dd6e95cbc78b7e668ccb98869
** Merge commit sha: 7bb14b113f0416e3f27afe483dc3f76d9f15f51a
**/
include/odp/api/spec/classification.h | 44 +++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/include/odp/api/spec/classification.h
b/include/odp/api/spec/classification.h
index 0c4a95c5..17c7718d 100644
--- a/include/odp/api/spec/classification.h
+++ b/include/odp/api/spec/classification.h
@@ -135,6 +135,13 @@ typedef struct odp_cls_capability_t {
/** A Boolean to denote support of PMR range */
odp_bool_t pmr_range_supported;
+
+ /** Support for Random Early Discard */
+ odp_support_t random_early_discard;
+
+ /** Support for Back Pressure to the remote peer */
+ odp_support_t back_pressure;
+
} odp_cls_capability_t;
/**
@@ -206,6 +213,43 @@ typedef struct odp_cls_cos_param {
/** Drop policy associated with CoS */
odp_cls_drop_t drop_policy;
+
+ /* Random Early Discard (RED)
+ * Random Early discard is enabled to initiate a drop probability
+ * for the incoming packet when the packets in the queue/pool reaches
+ * a specified threshold.
+ * When RED is enabled for a particular flow then further incoming
+ * packets are assigned a drop probability based on the size of the
+ * pool/queue and the drop probability becomes 1 when the queue/pool
+ * is full.
+ * RED is logically configured in the CoS and could be implemented
+ * in either pool or queue linked to the CoS depending on
+ * platform capabilities.
+ * RED is controlled using maximum and minimum threshold values
+ * which are defined as percentage of the system resource.
+ * RED is enabled when the resource limit is equal to or greater than
+ * the maximum threshold value and is disabled when resource limit
+ * is less than or equal to minimum threshold value. */
+
+ /* A boolean to enable RED parameters */
+ odp_bool_t red_enable;
+
+ /* Maximum threshold percentage for RED */
+ uint16_t max_red_threshold;
+
+ /* Minimum threshold percentage for RED */
+ uint16_t min_red_threshold;
+
+ /* Back pressure
+ * When back pressure is enabled for a particular flow, the HW can send
+ * back pressure information to the remote peer indicating a network
+ * congestion */
+ odp_bool_t bp_enable;
+
+ /* Threshold for enabling back pressure. BP is enabled when pool/queue
+ * size is equal to or greater than this backpressure threshold.
+ * BP threshold is expressed as a percentage of the resource size. */
+ uint16_t bp_threshold;
} odp_cls_cos_param_t;
/**
