From: Balasubramanian Manoharan <bala.manoha...@linaro.org> Adds random early detection and Back pressure feature to CoS
Signed-off-by: Balasubramanian Manoharan <bala.manoha...@linaro.org> --- /** Email created from pull request 277 (bala-manoharan:RED) ** https://github.com/Linaro/odp/pull/277 ** Patch: https://github.com/Linaro/odp/pull/277.patch ** Base sha: ba93e355ddf151215aa18b59cbfca08fe175fe65 ** Merge commit sha: 1c3ff9a77c88059189428342ddcb563eaee2f74c **/ include/odp/api/spec/classification.h | 67 +++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) diff --git a/include/odp/api/spec/classification.h b/include/odp/api/spec/classification.h index 0c4a95c5f..ce7a4eae2 100644 --- a/include/odp/api/spec/classification.h +++ b/include/odp/api/spec/classification.h @@ -20,6 +20,7 @@ extern "C" { #include <odp/api/packet_io.h> #include <odp/api/support.h> +#include <odp/api/threshold.h> /** @defgroup odp_classification ODP CLASSIFICATION * Classification operations. * @{ @@ -107,6 +108,54 @@ typedef union odp_cls_pmr_terms_t { uint64_t all_bits; } odp_cls_pmr_terms_t; +/** Random Early Detection (RED) + * Random Early Detection is enabled to initiate a drop probability for the + * incoming packet when the packets in the queue/pool reaches between the + * specified threshold. RED is enabled when 'red_enable' boolean is true and + * the resource limit is equal to or greater than the minimum threshold value. + * 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. + * Drop probability becomes zero when resource in the pool/queue is less than + * or equal to minimum threshold and it becomes 100% when resource in the + * pool/queue is greater than or equal to maximum threshold. + * RED is logically configured in the CoS and could be implemented in either + * pool or queue linked to the CoS depending on platform capabilities. + * Application should make sure not to link multiple CoS with different RED or + * BP configuration to the same queue or pool. + */ +typedef struct odp_red_param_t { + /** A boolean to enable RED + * When true, RED is enabled and configured with RED parameters. + * Otherwise, RED parameters are ignored. */ + odp_bool_t red_enable; + + /** Threshold parameters for RED + * RED is enabled when the resource limit is equal to or greater than + * the minimum threshold value and is disabled otherwise + */ + odp_threshold_t red_threshold; +} odp_red_param_t; + +/** Back pressure (BP) + * When back pressure is enabled for a particular flow, the HW can send + * back pressure information to the remote peer indicating a network congestion. + */ + +typedef struct odp_bp_param_t { + /** A boolean to enable Back pressure + * When true, back pressure is enabled and configured with the BP + * parameters. Otherwise BP parameters are ignored. + */ + odp_bool_t bp_enable; + + /** Threshold value for back pressure. + * BP is enabled when queue or pool value is equal to or greater + * than the max backpressure threshold. + * Min threshold parameters are ignored for BP configuration. + */ + odp_threshold_t bp_threshold; +} odp_bp_param_t; + /** * Classification capabilities * This capability structure defines system level classification capability @@ -135,6 +184,18 @@ typedef struct odp_cls_capability_t { /** A Boolean to denote support of PMR range */ odp_bool_t pmr_range_supported; + + /** Support for Random Early Detection */ + odp_support_t random_early_detection; + + /** Supported threshold type for RED */ + odp_threshold_types_t threshold_red; + + /** Support for Back Pressure to the remote peer */ + odp_support_t back_pressure; + + /** Supported threshold type for BP */ + odp_threshold_types_t threshold_bp; } odp_cls_capability_t; /** @@ -206,6 +267,12 @@ typedef struct odp_cls_cos_param { /** Drop policy associated with CoS */ odp_cls_drop_t drop_policy; + + /** Random Early Detection configuration */ + odp_red_param_t red; + + /** Back Pressure configuration */ + odp_bp_param_t bp; } odp_cls_cos_param_t; /**
