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From: Liang Ma <liangma@liangbit.com>
To: Bruce Richardson <bruce.richardson@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] Question about enable CBDMA with ioat PMD ?
Date: Wed, 14 Apr 2021 11:37:48 +0100	[thread overview]
Message-ID: <YHbF/ERzZ0mO7oiI@C02F33EJML85> (raw)
In-Reply-To: <20210413182441.GC1185@bricha3-MOBL.ger.corp.intel.com>

On Tue, Apr 13, 2021 at 07:24:41PM +0100, Bruce Richardson wrote:
> On Tue, Apr 13, 2021 at 06:36:38PM +0100, Liang Ma wrote:
> > Hi Bruce, 
> >    I look into current IOAT PMD. I found that looks only support the
> >    latest DSA device which is part of SPR(Please correct me if I'm wrong).
> >    However, there still is lots existing CPU that support previous CBDMA
> >    Intel Quick-DATA technology. SPDK enable those device with uio. 
> >    Any hint to enable those CBDMA device with IOAT PMD ? 
> >    
> 
> Hi Liang,
> 
> These devices are still supported by the driver. In the latest releases the
> new device support was added but no older device support was removed.
> Please let us know if you do hit any problems with running it on the CBDMA
> HW devices, because it should all still be working as before.
> 
> Regards,
> /Bruce
Hi Bruce, 
   I hit a problem with CBDMA enabling. 

   1. I follow the DPDK  IOAT driver Doc, I bind 0000.04.0 device with
      dpdk-devbind.py 
   
   2. I run dpdk-test without any parameter then dpdk-test complain with 

       EAL: VFIO support initialized
       EAL: 0000:00:04.0 VFIO group is not viable! Not all devices in IOMMU
       group bound to VFIO or unbound
       Requested device 0000:00:04.0 cannot be used

   3. kernel boot parameter include the "intel_iommu=on"

   If I still need some extra iommu settings for CBDMA device ?

Regards
Liang
          

  reply	other threads:[~2021-04-14 10:37 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-13 17:36 [dpdk-dev] Question about enable CBDMA with ioat PMD ? Liang Ma
2021-04-13 18:24 ` Bruce Richardson
2021-04-14 10:37   ` Liang Ma [this message]
2021-04-14 10:48     ` Bruce Richardson
2021-04-14 12:52       ` Liang Ma
2021-04-14 13:21         ` Bruce Richardson
2021-04-14 13:45           ` Liang Ma
2021-04-14 13:49             ` Bruce Richardson
2021-04-14 15:33             ` Burakov, Anatoly
2021-04-18 15:00               ` Liang Ma
2021-04-14 15:31       ` Burakov, Anatoly

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