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[
    {
        "id": 116733,
        "web_url": "https://patches.dpdk.org/comment/116733/",
        "msgid": "<a9aad9dd-7663-b1e2-97c3-d4186ac15986@redhat.com>",
        "date": "2020-07-28T07:15:11",
        "subject": "Re: [dpdk-dev] [PATCH] vdpa/mlx5: fix the compatibility with MISC4",
        "submitter": {
            "id": 512,
            "url": "https://patches.dpdk.org/api/people/512/",
            "name": "Maxime Coquelin",
            "email": "maxime.coquelin@redhat.com"
        },
        "content": "On 7/21/20 10:13 AM, Bing Zhao wrote:\n> When dynamic flex parser feature is introduced, the support for misc\n> parameters 4 of flow table entry (FTE) match set is needed. The\n> structure of \"mlx5_ifc_fte_match_param_bits\" is extended with\n> \"mlx5_ifc_fte_match_set_misc4_bits\" at the end of it. The total size\n> of the FTE match set will be changed into 384 bytes from 320 bytes.\n> Low level user space driver (rdma-core) will have the validation of\n> the length of FTE match set. In the old release that no MISC4\n> supported in the rdma-core, and this will break the backward\n> compatibility, even if the MISC4 is not used in most cases, like\n> in vDPA driver.\n> In order not to break the compatibility old rdma-core, the length\n> adjustment needs to be done. In mlx5 vDPA driver, the lengths of\n> the matcher and value are both set to 320 without MISC4. There is\n> no need to change the structure definition, all bytes of the MISC4\n> will be discarded if it is not needed. Since the MISC4 parameter\n> is aligned with a 64B boundary and so does the whole FTE match set\n> parameter, there is no need to take any padding and alignment into\n> consideration when calculating the size.\n> \n> Fixes: 32132fb8517c (\"net/mlx5: add flow translation of eCPRI header\")\n> \n> Signed-off-by: Bing Zhao <bingz@mellanox.com>\n> Acked-by: Matan Azrad <matan@mellanox.com>\n> ---\n>  drivers/vdpa/mlx5/mlx5_vdpa_steer.c | 6 ++++--\n>  1 file changed, 4 insertions(+), 2 deletions(-)\n\nReviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>\n\nThanks,\nMaxime",
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            "References": "<1595319220-173871-1-git-send-email-bingz@mellanox.com>",
            "Subject": "Re: [dpdk-dev] [PATCH] vdpa/mlx5: fix the compatibility with MISC4",
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            "Date": "Tue, 28 Jul 2020 09:15:11 +0200",
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            "To": "Bing Zhao <bingz@mellanox.com>, viacheslavo@mellanox.com,\n matan@mellanox.com",
            "From": "Maxime Coquelin <maxime.coquelin@redhat.com>",
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    {
        "id": 116766,
        "web_url": "https://patches.dpdk.org/comment/116766/",
        "msgid": "<VI1PR05MB41929C7A637F66EF92E4D419DD730@VI1PR05MB4192.eurprd05.prod.outlook.com>",
        "date": "2020-07-28T11:11:33",
        "subject": "Re: [dpdk-dev] [PATCH] vdpa/mlx5: fix the compatibility with MISC4",
        "submitter": {
            "id": 1357,
            "url": "https://patches.dpdk.org/api/people/1357/",
            "name": "Bing Zhao",
            "email": "bingz@mellanox.com"
        },
        "content": "Thanks a lot.\n\nBR. Bing\n\n> -----Original Message-----\n> From: Maxime Coquelin <maxime.coquelin@redhat.com>\n> Sent: Tuesday, July 28, 2020 3:15 PM\n> To: Bing Zhao <bingz@mellanox.com>; Slava Ovsiienko\n> <viacheslavo@mellanox.com>; Matan Azrad <matan@mellanox.com>\n> Cc: dev@dpdk.org\n> Subject: Re: [dpdk-dev] [PATCH] vdpa/mlx5: fix the compatibility with\n> MISC4\n> \n> \n> \n> On 7/21/20 10:13 AM, Bing Zhao wrote:\n> > When dynamic flex parser feature is introduced, the support for misc\n> > parameters 4 of flow table entry (FTE) match set is needed. The\n> > structure of \"mlx5_ifc_fte_match_param_bits\" is extended with\n> > \"mlx5_ifc_fte_match_set_misc4_bits\" at the end of it. The total size\n> > of the FTE match set will be changed into 384 bytes from 320 bytes.\n> > Low level user space driver (rdma-core) will have the validation of\n> > the length of FTE match set. In the old release that no MISC4\n> > supported in the rdma-core, and this will break the backward\n> > compatibility, even if the MISC4 is not used in most cases, like in\n> > vDPA driver.\n> > In order not to break the compatibility old rdma-core, the length\n> > adjustment needs to be done. In mlx5 vDPA driver, the lengths of\n> the\n> > matcher and value are both set to 320 without MISC4. There is no\n> need\n> > to change the structure definition, all bytes of the MISC4 will be\n> > discarded if it is not needed. Since the MISC4 parameter is aligned\n> > with a 64B boundary and so does the whole FTE match set parameter,\n> > there is no need to take any padding and alignment into\n> consideration\n> > when calculating the size.\n> >\n> > Fixes: 32132fb8517c (\"net/mlx5: add flow translation of eCPRI\n> header\")\n> >\n> > Signed-off-by: Bing Zhao <bingz@mellanox.com>\n> > Acked-by: Matan Azrad <matan@mellanox.com>\n> > ---\n> >  drivers/vdpa/mlx5/mlx5_vdpa_steer.c | 6 ++++--\n> >  1 file changed, 4 insertions(+), 2 deletions(-)\n> \n> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>\n> \n> Thanks,\n> Maxime",
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            "Subject": "Re: [dpdk-dev] [PATCH] vdpa/mlx5: fix the compatibility with MISC4",
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            "To": "Maxime Coquelin <maxime.coquelin@redhat.com>, Slava Ovsiienko\n <viacheslavo@mellanox.com>, Matan Azrad <matan@mellanox.com>",
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            "From": "Bing Zhao <bingz@mellanox.com>",
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            "Thread-Topic": "[dpdk-dev] [PATCH] vdpa/mlx5: fix the compatibility with MISC4",
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    {
        "id": 116784,
        "web_url": "https://patches.dpdk.org/comment/116784/",
        "msgid": "<3691e7f6-5cae-a97c-db4f-66a91cdde5c6@redhat.com>",
        "date": "2020-07-28T15:25:08",
        "subject": "Re: [dpdk-dev] [PATCH] vdpa/mlx5: fix the compatibility with MISC4",
        "submitter": {
            "id": 512,
            "url": "https://patches.dpdk.org/api/people/512/",
            "name": "Maxime Coquelin",
            "email": "maxime.coquelin@redhat.com"
        },
        "content": "On 7/21/20 10:13 AM, Bing Zhao wrote:\n> When dynamic flex parser feature is introduced, the support for misc\n> parameters 4 of flow table entry (FTE) match set is needed. The\n> structure of \"mlx5_ifc_fte_match_param_bits\" is extended with\n> \"mlx5_ifc_fte_match_set_misc4_bits\" at the end of it. The total size\n> of the FTE match set will be changed into 384 bytes from 320 bytes.\n> Low level user space driver (rdma-core) will have the validation of\n> the length of FTE match set. In the old release that no MISC4\n> supported in the rdma-core, and this will break the backward\n> compatibility, even if the MISC4 is not used in most cases, like\n> in vDPA driver.\n> In order not to break the compatibility old rdma-core, the length\n> adjustment needs to be done. In mlx5 vDPA driver, the lengths of\n> the matcher and value are both set to 320 without MISC4. There is\n> no need to change the structure definition, all bytes of the MISC4\n> will be discarded if it is not needed. Since the MISC4 parameter\n> is aligned with a 64B boundary and so does the whole FTE match set\n> parameter, there is no need to take any padding and alignment into\n> consideration when calculating the size.\n> \n> Fixes: 32132fb8517c (\"net/mlx5: add flow translation of eCPRI header\")\n> \n> Signed-off-by: Bing Zhao <bingz@mellanox.com>\n> Acked-by: Matan Azrad <matan@mellanox.com>\n> ---\n>  drivers/vdpa/mlx5/mlx5_vdpa_steer.c | 6 ++++--\n>  1 file changed, 4 insertions(+), 2 deletions(-)\n\nPlease note the sha-1 in the fixes tag was not good, I fixed it.\n\nApplied to dpdk-next-virtio/master\n\nThanks,\nMaxime",
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            "References": "<1595319220-173871-1-git-send-email-bingz@mellanox.com>",
            "Subject": "Re: [dpdk-dev] [PATCH] vdpa/mlx5: fix the compatibility with MISC4",
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            "Message-ID": "<3691e7f6-5cae-a97c-db4f-66a91cdde5c6@redhat.com>",
            "Date": "Tue, 28 Jul 2020 17:25:08 +0200",
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            "To": "Bing Zhao <bingz@mellanox.com>, viacheslavo@mellanox.com,\n matan@mellanox.com",
            "From": "Maxime Coquelin <maxime.coquelin@redhat.com>",
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