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GET /api/patches/42713/?format=api
HTTP 200 OK
Allow: GET, PUT, PATCH, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 42713,
    "url": "http://patches.dpdk.org/api/patches/42713/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/patch/1531233760-4929-2-git-send-email-anoob.joseph@caviumnetworks.com/",
    "project": {
        "id": 1,
        "url": "http://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": "<1531233760-4929-2-git-send-email-anoob.joseph@caviumnetworks.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/1531233760-4929-2-git-send-email-anoob.joseph@caviumnetworks.com",
    "date": "2018-07-10T14:42:37",
    "name": "[v2,1/4] cryptodev: add min headroom and tailroom requirement",
    "commit_ref": null,
    "pull_url": null,
    "state": "accepted",
    "archived": true,
    "hash": "bcdbf8bdf716cad1284b81bf2411ad9aa1933bc7",
    "submitter": {
        "id": 893,
        "url": "http://patches.dpdk.org/api/people/893/?format=api",
        "name": "Anoob Joseph",
        "email": "anoob.joseph@caviumnetworks.com"
    },
    "delegate": {
        "id": 22,
        "url": "http://patches.dpdk.org/api/users/22/?format=api",
        "username": "pdelarag",
        "first_name": "Pablo",
        "last_name": "de Lara Guarch",
        "email": "pablo.de.lara.guarch@intel.com"
    },
    "mbox": "http://patches.dpdk.org/project/dpdk/patch/1531233760-4929-2-git-send-email-anoob.joseph@caviumnetworks.com/mbox/",
    "series": [
        {
            "id": 495,
            "url": "http://patches.dpdk.org/api/series/495/?format=api",
            "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=495",
            "date": "2018-07-10T14:42:36",
            "name": "add head/tailroom requirement for crypto PMDs",
            "version": 2,
            "mbox": "http://patches.dpdk.org/series/495/mbox/"
        }
    ],
    "comments": "http://patches.dpdk.org/api/patches/42713/comments/",
    "check": "success",
    "checks": "http://patches.dpdk.org/api/patches/42713/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<dev-bounces@dpdk.org>",
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            "from ajoseph83.caveonetworks.com.caveonetworks.com (115.113.156.2)\n\tby DM6PR07MB4905.namprd07.prod.outlook.com (2603:10b6:5:a3::10)\n\twith Microsoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.930.20;\n\tTue, 10 Jul 2018 14:43:19 +0000"
        ],
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        "Authentication-Results": "spf=none (sender IP is )\n\tsmtp.mailfrom=Anoob.Joseph@cavium.com; ",
        "From": "Anoob Joseph <anoob.joseph@caviumnetworks.com>",
        "To": "Declan Doherty <declan.doherty@intel.com>,\n\tPablo de Lara <pablo.de.lara.guarch@intel.com>",
        "Cc": "Anoob Joseph <anoob.joseph@caviumnetworks.com>,\n\tAkhil Goyal <akhil.goyal@nxp.com>,\n\tAnkur Dwivedi <ankur.dwivedi@caviumnetworks.com>,\n\tJerin Jacob <jerin.jacob@caviumnetworks.com>,\n\tNarayana Prasad <narayanaprasad.athreya@caviumnetworks.com>, dev@dpdk.org",
        "Date": "Tue, 10 Jul 2018 20:12:37 +0530",
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        "Subject": "[dpdk-dev] [PATCH v2 1/4] cryptodev: add min headroom and tailroom\n\trequirement",
        "X-BeenThere": "dev@dpdk.org",
        "X-Mailman-Version": "2.1.15",
        "Precedence": "list",
        "List-Id": "DPDK patches and discussions <dev.dpdk.org>",
        "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>",
        "List-Archive": "<http://mails.dpdk.org/archives/dev/>",
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        "List-Help": "<mailto:dev-request@dpdk.org?subject=help>",
        "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>",
        "Errors-To": "dev-bounces@dpdk.org",
        "Sender": "\"dev\" <dev-bounces@dpdk.org>"
    },
    "content": "Enabling crypto devs to specify the minimum headroom and tailroom it\nexpects in the mbuf. For net PMDs, standard headroom has to be honoured\nby applications, which is not strictly followed for crypto devs. This\nprevents crypto devs from using free space in mbuf (available as\nhead/tailroom) for internal requirements in crypto operations. Addition\nof head/tailroom requirement will help PMDs to communicate such\nrequirements to the application.\n\nThe availability and use of head/tailroom is an optimization if the\nhardware supports use of head/tailroom for crypto-op info. For devices\nthat do not support using the head/tailroom, they can continue to operate\nwithout any performance-drop.\n\nSigned-off-by: Anoob Joseph <anoob.joseph@caviumnetworks.com>\n---\nv2:\n* No change\n\nv1:\n* Removed deprecation notice\n* Updated release note\n* Renamed new fields to have 'mbuf' in the name\n* Changed the type of new fields to uint16_t (instead of uint32_t)\n\n doc/guides/rel_notes/release_18_08.rst | 6 ++++++\n lib/librte_cryptodev/rte_cryptodev.h   | 6 ++++++\n 2 files changed, 12 insertions(+)",
    "diff": "diff --git a/doc/guides/rel_notes/release_18_08.rst b/doc/guides/rel_notes/release_18_08.rst\nindex 5bc23c5..fae0d26 100644\n--- a/doc/guides/rel_notes/release_18_08.rst\n+++ b/doc/guides/rel_notes/release_18_08.rst\n@@ -70,6 +70,12 @@ ABI Changes\n    Also, make sure to start the actual text at the margin.\n    =========================================================\n \n+* cryptodev: Additional fields in rte_cryptodev_info.\n+\n+  Two new fields of type ``uint16_t`` added in ``rte_cryptodev_info``\n+  structure: ``min_mbuf_headroom_req`` and ``min_mbuf_tailroom_req``. These\n+  parameters specify the recommended headroom and tailroom for mbufs to be\n+  processed by the PMD.\n \n Removed Items\n -------------\ndiff --git a/lib/librte_cryptodev/rte_cryptodev.h b/lib/librte_cryptodev/rte_cryptodev.h\nindex 92ce6d4..4e5b5b4 100644\n--- a/lib/librte_cryptodev/rte_cryptodev.h\n+++ b/lib/librte_cryptodev/rte_cryptodev.h\n@@ -382,6 +382,12 @@ struct rte_cryptodev_info {\n \tunsigned max_nb_queue_pairs;\n \t/**< Maximum number of queues pairs supported by device. */\n \n+\tuint16_t min_mbuf_headroom_req;\n+\t/**< Minimum mbuf headroom required by device */\n+\n+\tuint16_t min_mbuf_tailroom_req;\n+\t/**< Minimum mbuf tailroom required by device */\n+\n \tstruct {\n \t\tunsigned max_nb_sessions;\n \t\t/**< Maximum number of sessions supported by device. */\n",
    "prefixes": [
        "v2",
        "1/4"
    ]
}