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DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Dec 2023 01:34:29.6788 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d00fdd12-b831-4403-cab2-08dc0032a51b X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.160]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS3PEPF000099DF.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR12MB6243 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The compare item allows adding flow match with comparison result. This commit adds compare item support to the PMD code. Due to HW limitation: - Only HWS supported. - Only 32-bit comparison is supported. - Only single compare flow is supported in the flow table. - Only match with compare result between packet fields is supported. Signed-off-by: Suanming Mou --- doc/guides/nics/features/mlx5.ini | 1 + doc/guides/nics/mlx5.rst | 7 +++ doc/guides/rel_notes/release_24_03.rst | 2 +- drivers/net/mlx5/mlx5_flow.h | 3 ++ drivers/net/mlx5/mlx5_flow_hw.c | 73 ++++++++++++++++++++++++++ 5 files changed, 85 insertions(+), 1 deletion(-) diff --git a/doc/guides/nics/features/mlx5.ini b/doc/guides/nics/features/mlx5.ini index 0739fe9d63..00e9348fc6 100644 --- a/doc/guides/nics/features/mlx5.ini +++ b/doc/guides/nics/features/mlx5.ini @@ -56,6 +56,7 @@ Usage doc = Y [rte_flow items] aggr_affinity = Y +compare = Y conntrack = Y ecpri = Y esp = Y diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst index 6b52fb93c5..18b40bc22d 100644 --- a/doc/guides/nics/mlx5.rst +++ b/doc/guides/nics/mlx5.rst @@ -778,6 +778,13 @@ Limitations The flow engine of a process cannot move from active to standby mode if preceding active application rules are still present and vice versa. +- Match with compare result item (``RTE_FLOW_ITEM_TYPE_COMPARE``): + + - Only supported in HW steering(``dv_flow_en`` = 2) mode. + - Only single flow is supported to the flow table. + - Only 32-bit comparison is supported. + - Only match with compare result between packet fields is supported. + Statistics ---------- diff --git a/doc/guides/rel_notes/release_24_03.rst b/doc/guides/rel_notes/release_24_03.rst index 71ebd67dbd..5693ea4628 100644 --- a/doc/guides/rel_notes/release_24_03.rst +++ b/doc/guides/rel_notes/release_24_03.rst @@ -63,7 +63,7 @@ New Features * **Updated NVIDIA mlx5 driver.** * Added support for accumulating from src field to dst field. - + * Added support for comparing result between packet fields or value. Removed Items ------------- diff --git a/drivers/net/mlx5/mlx5_flow.h b/drivers/net/mlx5/mlx5_flow.h index 8e2034473c..6698de2a3e 100644 --- a/drivers/net/mlx5/mlx5_flow.h +++ b/drivers/net/mlx5/mlx5_flow.h @@ -277,6 +277,9 @@ enum mlx5_feature_name { /* NSH ITEM */ #define MLX5_FLOW_ITEM_NSH (1ull << 53) +/* COMPARE ITEM */ +#define MLX5_FLOW_ITEM_COMPARE (1ull << 54) + /* Outer Masks. */ #define MLX5_FLOW_LAYER_OUTER_L3 \ (MLX5_FLOW_LAYER_OUTER_L3_IPV4 | MLX5_FLOW_LAYER_OUTER_L3_IPV6) diff --git a/drivers/net/mlx5/mlx5_flow_hw.c b/drivers/net/mlx5/mlx5_flow_hw.c index c4a90a3690..82d7fa006f 100644 --- a/drivers/net/mlx5/mlx5_flow_hw.c +++ b/drivers/net/mlx5/mlx5_flow_hw.c @@ -426,6 +426,9 @@ flow_hw_matching_item_flags_get(const struct rte_flow_item items[]) case RTE_FLOW_ITEM_TYPE_GTP: last_item = MLX5_FLOW_LAYER_GTP; break; + case RTE_FLOW_ITEM_TYPE_COMPARE: + last_item = MLX5_FLOW_ITEM_COMPARE; + break; default: break; } @@ -4390,6 +4393,8 @@ flow_hw_table_create(struct rte_eth_dev *dev, rte_errno = EINVAL; goto it_error; } + if (item_templates[i]->item_flags & MLX5_FLOW_ITEM_COMPARE) + matcher_attr.mode = MLX5DR_MATCHER_RESOURCE_MODE_HTABLE; ret = __atomic_fetch_add(&item_templates[i]->refcnt, 1, __ATOMIC_RELAXED) + 1; if (ret <= 1) { @@ -6670,6 +6675,66 @@ flow_hw_prepend_item(const struct rte_flow_item *items, return copied_items; } +static inline bool +flow_hw_item_compare_field_supported(enum rte_flow_field_id field) +{ + switch (field) { + case RTE_FLOW_FIELD_TAG: + case RTE_FLOW_FIELD_META: + case RTE_FLOW_FIELD_VALUE: + return true; + default: + break; + } + return false; +} + +static int +flow_hw_validate_item_compare(const struct rte_flow_item *item, + struct rte_flow_error *error) +{ + const struct rte_flow_item_compare *comp_m = item->mask; + const struct rte_flow_item_compare *comp_v = item->spec; + + if (unlikely(!comp_m)) + return rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, + "compare item mask is missing"); + if (comp_m->width != UINT32_MAX) + return rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, + "compare item only support full mask"); + if (!flow_hw_item_compare_field_supported(comp_m->a.field) || + !flow_hw_item_compare_field_supported(comp_m->b.field)) + return rte_flow_error_set(error, ENOTSUP, + RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, + "compare item field not support"); + if (comp_m->a.field == RTE_FLOW_FIELD_VALUE && + comp_m->b.field == RTE_FLOW_FIELD_VALUE) + return rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, + "compare between value is not valid"); + if (comp_v) { + if (comp_v->operation != comp_m->operation || + comp_v->a.field != comp_m->a.field || + comp_v->b.field != comp_m->b.field) + return rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, + "compare item spec/mask not matching"); + if ((comp_v->width & comp_m->width) != 32) + return rte_flow_error_set(error, EINVAL, + RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, + "compare item only support full mask"); + } + return 0; +} + static int flow_hw_pattern_validate(struct rte_eth_dev *dev, const struct rte_flow_pattern_template_attr *attr, @@ -6680,6 +6745,7 @@ flow_hw_pattern_validate(struct rte_eth_dev *dev, int i, tag_idx; bool items_end = false; uint32_t tag_bitmap = 0; + int ret; if (!attr->ingress && !attr->egress && !attr->transfer) return rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_ATTR, NULL, @@ -6817,6 +6883,13 @@ flow_hw_pattern_validate(struct rte_eth_dev *dev, " attribute"); break; } + case RTE_FLOW_ITEM_TYPE_COMPARE: + { + ret = flow_hw_validate_item_compare(&items[i], error); + if (ret) + return ret; + break; + } case RTE_FLOW_ITEM_TYPE_VOID: case RTE_FLOW_ITEM_TYPE_ETH: case RTE_FLOW_ITEM_TYPE_VLAN: -- 2.34.1