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GET /api/patches/136496/?format=api
HTTP 200 OK
Allow: GET, PUT, PATCH, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 136496,
    "url": "https://patches.dpdk.org/api/patches/136496/?format=api",
    "web_url": "https://patches.dpdk.org/project/dpdk/patch/20240207161414.1583125-3-michaelba@nvidia.com/",
    "project": {
        "id": 1,
        "url": "https://patches.dpdk.org/api/projects/1/?format=api",
        "name": "DPDK",
        "link_name": "dpdk",
        "list_id": "dev.dpdk.org",
        "list_email": "dev@dpdk.org",
        "web_url": "http://core.dpdk.org",
        "scm_url": "git://dpdk.org/dpdk",
        "webscm_url": "http://git.dpdk.org/dpdk",
        "list_archive_url": "https://inbox.dpdk.org/dev",
        "list_archive_url_format": "https://inbox.dpdk.org/dev/{}",
        "commit_url_format": ""
    },
    "msgid": "<20240207161414.1583125-3-michaelba@nvidia.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/20240207161414.1583125-3-michaelba@nvidia.com",
    "date": "2024-02-07T16:14:14",
    "name": "[v4,2/2] net/mlx5: add support to compare random value",
    "commit_ref": null,
    "pull_url": null,
    "state": "superseded",
    "archived": true,
    "hash": "f11b3d31e0bcba0675981cbbee99c75adad45f62",
    "submitter": {
        "id": 1949,
        "url": "https://patches.dpdk.org/api/people/1949/?format=api",
        "name": "Michael Baum",
        "email": "michaelba@nvidia.com"
    },
    "delegate": {
        "id": 3268,
        "url": "https://patches.dpdk.org/api/users/3268/?format=api",
        "username": "rasland",
        "first_name": "Raslan",
        "last_name": "Darawsheh",
        "email": "rasland@nvidia.com"
    },
    "mbox": "https://patches.dpdk.org/project/dpdk/patch/20240207161414.1583125-3-michaelba@nvidia.com/mbox/",
    "series": [
        {
            "id": 31041,
            "url": "https://patches.dpdk.org/api/series/31041/?format=api",
            "web_url": "https://patches.dpdk.org/project/dpdk/list/?series=31041",
            "date": "2024-02-07T16:14:12",
            "name": "net/mlx5: add random compare support",
            "version": 4,
            "mbox": "https://patches.dpdk.org/series/31041/mbox/"
        }
    ],
    "comments": "https://patches.dpdk.org/api/patches/136496/comments/",
    "check": "success",
    "checks": "https://patches.dpdk.org/api/patches/136496/checks/",
    "tags": {},
    "related": [],
    "headers": {
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        "From": "Michael Baum <michaelba@nvidia.com>",
        "To": "<dev@dpdk.org>",
        "CC": "Matan Azrad <matan@nvidia.com>, Dariusz Sosnowski <dsosnowski@nvidia.com>,\n Raslan Darawsheh <rasland@nvidia.com>, Viacheslav Ovsiienko\n <viacheslavo@nvidia.com>, Ori Kam <orika@nvidia.com>, Suanming Mou\n <suanmingm@nvidia.com>",
        "Subject": "[PATCH v4 2/2] net/mlx5: add support to compare random value",
        "Date": "Wed, 7 Feb 2024 18:14:14 +0200",
        "Message-ID": "<20240207161414.1583125-3-michaelba@nvidia.com>",
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    },
    "content": "Add support to use \"RTE_FLOW_ITEM_TYPE_COMPARE\" with\n\"RTE_FLOW_FIELD_RAMDOM\" as an argument.\nThe random field is supported only when base is an immediate value,\nrandom field cannot be compared with enother field.\n\nSigned-off-by: Michael Baum <michaelba@nvidia.com>\n---\n doc/guides/nics/mlx5.rst        |  9 ++++-\n drivers/net/mlx5/mlx5_flow_hw.c | 70 ++++++++++++++++++++++++---------\n 2 files changed, 59 insertions(+), 20 deletions(-)",
    "diff": "diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst\nindex fa013b03bb..43ef8a99dc 100644\n--- a/doc/guides/nics/mlx5.rst\n+++ b/doc/guides/nics/mlx5.rst\n@@ -820,8 +820,13 @@ Limitations\n \n   - Only supported in HW steering(``dv_flow_en`` = 2) mode.\n   - Only single flow is supported to the flow table.\n-  - Only 32-bit comparison is supported.\n-  - Only match with compare result between packet fields is supported.\n+  - Only single item is supported per pattern template.\n+  - Only 32-bit comparison is supported or 16-bits for random field.\n+  - Only supported for ``RTE_FLOW_FIELD_META``, ``RTE_FLOW_FIELD_TAG``,\n+    ``RTE_FLOW_FIELD_RANDOM`` and ``RTE_FLOW_FIELD_VALUE``.\n+  - The field type ``RTE_FLOW_FIELD_VALUE`` must be the base (``b``) field.\n+  - The field type ``RTE_FLOW_FIELD_RANDOM`` can only be compared with\n+    ``RTE_FLOW_FIELD_VALUE``.\n \n \n Statistics\ndiff --git a/drivers/net/mlx5/mlx5_flow_hw.c b/drivers/net/mlx5/mlx5_flow_hw.c\nindex 3af5e1f160..b5741f0817 100644\n--- a/drivers/net/mlx5/mlx5_flow_hw.c\n+++ b/drivers/net/mlx5/mlx5_flow_hw.c\n@@ -6717,18 +6717,55 @@ flow_hw_prepend_item(const struct rte_flow_item *items,\n \treturn copied_items;\n }\n \n-static inline bool\n-flow_hw_item_compare_field_supported(enum rte_flow_field_id field)\n+static int\n+flow_hw_item_compare_field_validate(enum rte_flow_field_id arg_field,\n+\t\t\t\t    enum rte_flow_field_id base_field,\n+\t\t\t\t    struct rte_flow_error *error)\n {\n-\tswitch (field) {\n+\tswitch (arg_field) {\n+\tcase RTE_FLOW_FIELD_TAG:\n+\tcase RTE_FLOW_FIELD_META:\n+\t\tbreak;\n+\tcase RTE_FLOW_FIELD_RANDOM:\n+\t\tif (base_field == RTE_FLOW_FIELD_VALUE)\n+\t\t\treturn 0;\n+\t\treturn rte_flow_error_set(error, EINVAL,\n+\t\t\t\t\t  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,\n+\t\t\t\t\t  NULL,\n+\t\t\t\t\t  \"compare random is supported only with immediate value\");\n+\tdefault:\n+\t\treturn rte_flow_error_set(error, ENOTSUP,\n+\t\t\t\t\t  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,\n+\t\t\t\t\t  NULL,\n+\t\t\t\t\t  \"compare item argument field is not supported\");\n+\t}\n+\tswitch (base_field) {\n \tcase RTE_FLOW_FIELD_TAG:\n \tcase RTE_FLOW_FIELD_META:\n \tcase RTE_FLOW_FIELD_VALUE:\n-\t\treturn true;\n+\t\tbreak;\n+\tdefault:\n+\t\treturn rte_flow_error_set(error, ENOTSUP,\n+\t\t\t\t\t  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,\n+\t\t\t\t\t  NULL,\n+\t\t\t\t\t  \"compare item base field is not supported\");\n+\t}\n+\treturn 0;\n+}\n+\n+static inline uint32_t\n+flow_hw_item_compare_width_supported(enum rte_flow_field_id field)\n+{\n+\tswitch (field) {\n+\tcase RTE_FLOW_FIELD_TAG:\n+\tcase RTE_FLOW_FIELD_META:\n+\t\treturn 32;\n+\tcase RTE_FLOW_FIELD_RANDOM:\n+\t\treturn 16;\n \tdefault:\n \t\tbreak;\n \t}\n-\treturn false;\n+\treturn 0;\n }\n \n static int\n@@ -6737,6 +6774,7 @@ flow_hw_validate_item_compare(const struct rte_flow_item *item,\n {\n \tconst struct rte_flow_item_compare *comp_m = item->mask;\n \tconst struct rte_flow_item_compare *comp_v = item->spec;\n+\tint ret;\n \n \tif (unlikely(!comp_m))\n \t\treturn rte_flow_error_set(error, EINVAL,\n@@ -6748,19 +6786,13 @@ flow_hw_validate_item_compare(const struct rte_flow_item *item,\n \t\t\t\t   RTE_FLOW_ERROR_TYPE_UNSPECIFIED,\n \t\t\t\t   NULL,\n \t\t\t\t   \"compare item only support full mask\");\n-\tif (!flow_hw_item_compare_field_supported(comp_m->a.field) ||\n-\t    !flow_hw_item_compare_field_supported(comp_m->b.field))\n-\t\treturn rte_flow_error_set(error, ENOTSUP,\n-\t\t\t\t   RTE_FLOW_ERROR_TYPE_UNSPECIFIED,\n-\t\t\t\t   NULL,\n-\t\t\t\t   \"compare item field not support\");\n-\tif (comp_m->a.field == RTE_FLOW_FIELD_VALUE &&\n-\t    comp_m->b.field == RTE_FLOW_FIELD_VALUE)\n-\t\treturn rte_flow_error_set(error, EINVAL,\n-\t\t\t\t   RTE_FLOW_ERROR_TYPE_UNSPECIFIED,\n-\t\t\t\t   NULL,\n-\t\t\t\t   \"compare between value is not valid\");\n+\tret = flow_hw_item_compare_field_validate(comp_m->a.field,\n+\t\t\t\t\t\t  comp_m->b.field, error);\n+\tif (ret < 0)\n+\t\treturn ret;\n \tif (comp_v) {\n+\t\tuint32_t width;\n+\n \t\tif (comp_v->operation != comp_m->operation ||\n \t\t    comp_v->a.field != comp_m->a.field ||\n \t\t    comp_v->b.field != comp_m->b.field)\n@@ -6768,7 +6800,9 @@ flow_hw_validate_item_compare(const struct rte_flow_item *item,\n \t\t\t\t\t   RTE_FLOW_ERROR_TYPE_UNSPECIFIED,\n \t\t\t\t\t   NULL,\n \t\t\t\t\t   \"compare item spec/mask not matching\");\n-\t\tif ((comp_v->width & comp_m->width) != 32)\n+\t\twidth = flow_hw_item_compare_width_supported(comp_v->a.field);\n+\t\tMLX5_ASSERT(width > 0);\n+\t\tif ((comp_v->width & comp_m->width) != width)\n \t\t\treturn rte_flow_error_set(error, EINVAL,\n \t\t\t\t\t   RTE_FLOW_ERROR_TYPE_UNSPECIFIED,\n \t\t\t\t\t   NULL,\n",
    "prefixes": [
        "v4",
        "2/2"
    ]
}