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07:44:07 +0000 To: Matan Azrad , "Liang, Cunming" , "Bie, Tiwei" CC: "Wang, Xiao W" , Thomas Monjalon , "maxime.coquelin@redhat.com" , "Wang, Zhihong" , "Yigit, Ferruh" , Shahaf Shuler , Ori Kam , "dev@dpdk.org" , Slava Ovsiienko , Asaf Penso , Olga Shern References: <20191206042745.GA706462@___> From: Andrew Rybchenko Autocrypt: addr=arybchenko@solarflare.com; keydata= mQINBF2681gBEACbdTxu8eLL3UX2oAelsnK9GkeaJeUYSOHPJQpV7RL/iaIskqTwBRnhjXt7 j9UEwGA+omnOmqQMpeQTb/F9Ma2dYE+Hw4/t/1KVjxr3ehFaASvwR4fWJfO4e2l/Rk4rG6Yi 5r6CWU2y8su2654Fr8KFc+cMGOAgKoZTZHZsRy5lHpMlemeF+VZkv8L5sYJWPnsypgqlCG3h v6lbtfZs+QqYbFH6bqoZwBAl5irmxywGR7ZJr1GLUZZ1lfdazSY8r6Vz0/Ip/KVxGu2uxo81 QCsAj0ZsQtwji9Sds/prTiPrIjx8Fc/tfbnAuVuPcnPbczwCJACzQr4q26XATL3kVuZhSBWh 4XfO/EAUuEq5AemUG5DDTM87g7Lp4eT9gMZB6P+rJwWPNWTiV3L7Cn+fO+l9mTPnOqdzBgDe OaulKiNSft1o0DY4bGzOmM2ad2cZt0jfnbMPMTE9zsr6+RFa+M8Ct20o6U1MUE4vP6veErMK of4kZ8PdoMM+Sq1hxMPNtlcVBSP9xMmdSZPlfDYI5VWosOceEcz7XZdjBJKdwKuz70V7eac4 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<0c1e0a93-321a-4307-8493-b76c9c75c290@solarflare.com> Date: Mon, 9 Dec 2019 10:44:03 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 8bit X-Originating-IP: [10.17.10.39] X-ClientProxiedBy: ocex03.SolarFlarecom.com (10.20.40.36) To ukex01.SolarFlarecom.com (10.17.10.4) X-TM-AS-Product-Ver: SMEX-12.5.0.1300-8.5.1010-25092.003 X-TM-AS-Result: No-8.621900-8.000000-10 X-TMASE-MatchedRID: xcONGPdDH5o9gZmQY0RBhPZvT2zYoYOwt3aeg7g/usAutoY2UtFqGGO2 7X3o/SbCQEGpxc+PayBX8XJzeZUNaQyGkz7OWC8/d+htSnYogywZskwWqoib3DuwTDpX8ii04ie kOi8xclIqBvIJU4dJVoL7JbSyOvceQBI3/CURWxywWQIt565820loPruIq9jTbcPp/oilssgvr7 iJcUnmgXf3kmnYIO1W+zSnDDFnArlbcZOtVr8VLuIfK/Jd5eHmKWPnYJ5Ay2q/md2adk3dRFskc YD9GA2rl8ANyEhBoJtA32AnU++FvNJPy68lsuBAIuN48JyY3bmN4N/KM3iaB6ltwC81AJoFgM7J Gveaeukgu4JSJQMt8PBQfhQWLJCAzAK8xc3p7dZZZYpuBxXlgGCwU6go4mfmRjNrjV0arFLaM23 jg516ZTRR38NNds3TX7bicKxRIU23sNbcHjySQQD6RpjqQGaF+gtHj7OwNO3x/F0UMEoTu/qZwK XWZTEK9Hm4XVtY3I3EtT5bBohbeJKA3RrbLrzqD72PeJaPLsay4/XqNwspPUOI44Xx9SBOMjbUZ K/LT2EMbsHnt93+MlHTb2Y4zo/QutwTzHK3ELl3mFldkWgHw/pJH+h4T7AX X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--8.621900-8.000000 X-TMASE-Version: SMEX-12.5.0.1300-8.5.1010-25092.003 X-MDID: 1575877458-ZI4CCTfcxzUE Subject: Re: [dpdk-dev] discussion: creating a new class for vdpa driversxiao.w.wang@intel.com X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 12/8/19 10:06 AM, Matan Azrad wrote: > From: Andrew Rybchenko >> On 12/6/19 8:32 AM, Liang, Cunming wrote: >>> >>> >>>> -----Original Message----- >>>> From: Bie, Tiwei >>>> Sent: Friday, December 6, 2019 12:28 PM >>>> To: Matan Azrad >>>> Cc: Wang, Xiao W ; Thomas Monjalon >>>> ; maxime.coquelin@redhat.com; Wang, >> Zhihong >>>> ; Yigit, Ferruh ; >>>> Shahaf Shuler ; Ori Kam >> ; >>>> dev@dpdk.org; Slava Ovsiienko ; Asaf >> Penso >>>> ; Olga Shern ; Liang, >> Cunming >>>> >>>> Subject: Re: discussion: creating a new class for vdpa >>>> driversxiao.w.wang@intel.com >>>> >>>> On Thu, Dec 05, 2019 at 01:26:36PM +0000, Matan Azrad wrote: >>>>> Hi all >>>>> >>>>> As described in RFC “[RFC] net: new vdpa PMD for Mellanox devices”, >>>>> a new vdpa drivers is going to be added for Mellanox devices – >>>>> mlx5_vdpa >>>>> >>>>> The only vdpa driver now is the IFC driver that is located in net directory. >>>>> >>>>> The IFC driver and the new mlx5_vdpa driver provide the vdpa ops and >>>>> not the eth_dev ops. >>>>> >>>>> All the others drivers in net provide the eth-dev ops. >>>>> >>>>> I suggest to create a new class for vdpa drivers, to move IFC to >>>>> this class and to add the mlx5_vdpa to this class too. >>>>> >>>>> Later, all the new drivers that implements the vdpa ops will be >>>>> added to the vdpa class. >>>> >>>> +1. Sounds like a good idea to me. >>> +1 >> >> vDPA drivers are vendor-specific and expected to talk to vendor NIC. I.e. >> there are significant chances to share code with network drivers (e.g. base >> driver). Should base driver be moved to drivers/common in this case or is it >> still allows to have vdpa driver in drivers/net together with ethdev driver? > > Yes, I think this should be the method, shared code should be moved to the drivers/common directory. > I think there is a precedence with shared code in common which shares a vendor specific code between crypto and net. I see motivation behind driver/vdpa. However, vdpa and net drivers tightly related and I would prefer to avoid extra complexity here. Right now simplicity over-weights for me. No strong opinion on the topic, but it definitely requires better and more clear motivation why a new class should be introduced and existing drivers restructured. > Actually, this is my plan to share mlx5 vdpa code with mlx5 net code by the drivers/common dir (see RFC). I see.