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From: "Harris, James R" <james.r.harris@intel.com>
To: Thomas Monjalon <thomas@monjalon.net>,
	"Liu, Changpeng" <changpeng.liu@intel.com>,
	"Xia, Chenbo" <chenbo.xia@intel.com>
Cc: David Marchand <david.marchand@redhat.com>,
	"dev@dpdk.org" <dev@dpdk.org>,  Aaron Conole <aconole@redhat.com>,
	"Zawadzki, Tomasz" <tomasz.zawadzki@intel.com>
Subject: Re: [dpdk-dev] [PATCH v2 0/7] Removal of PCI bus ABIs
Date: Tue, 12 Oct 2021 00:35:58 +0000	[thread overview]
Message-ID: <97904C86-DB0D-4237-B6D0-373E4C612695@intel.com> (raw)
In-Reply-To: <4923788.u9mvHzJ4CB@thomas>



On 10/11/21, 5:55 AM, "Thomas Monjalon" <thomas@monjalon.net> wrote:

    11/10/2021 08:58, Xia, Chenbo:
    > From: Liu, Changpeng <changpeng.liu@intel.com>
    > > Another issue raised by Jim Harris is that for distro packaged DPDK, since
    > > this option isn't enabled by default, this will not allow SPDK
    > > to use the distro packaged DPDK after this release.
    > 
    > I think for this problem, we have two options: enable driver sdk by default or
    > let OSV configure the option when building distros. I'm fine with either option.

    The meson option enable_driver_sdk is described as "Install headers to build drivers."
    Standard development packages should provide headers to build an application.
    This option is for projects extending DPDK drivers out of the tree.
    The preferred option is to develop drivers inside DPDK.

    If a project needs the special option enable_driver_sdk,
    1/ it is not following the recommended approach,
    2/ it has to manage the burden of driver compatibility with DPDK,
    3/ it can compile DPDK itself.

    So I think we neither need to make it a default, nor force distros to enable it.
    Am I missing something?

Hi Thomas,

This preference to develop PCI drivers inside of DPDK seems to be a very recent preference.  enable_driver_sdk was just added in DPDK 21.05, and for building out-of-tree ethdev drivers. But DPDK has always enabled building out-of-tree PCI drivers with its default build configuration - SPDK has relied on these APIs since its inception.

We have always viewed DPDK as being a very useful toolkit for building userspace drivers (especially storage drivers!) that aren't part of DPDK itself.  We hope that continues to be the case.

All of that being said, SPDK already compiles DPDK itself as the default configuration. We maintain a DPDK fork for patches that have not yet hit DPDK upstream. If this gets merged we can document that users building DPDK themselves must set enable_driver_sdk. We can also document to our users that SPDK may not build against distro DPDK packages, once distros pick up these changes.

-Jim



  reply	other threads:[~2021-10-12  0:36 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-10  2:23 [dpdk-dev] [PATCH 0/8] Removal of PCI bus ABIs Chenbo Xia
2021-09-10  2:23 ` [dpdk-dev] [PATCH 1/8] bus/pci: add new memory resource access APIs Chenbo Xia
2021-09-13 11:59   ` Kinsella, Ray
2021-09-10  2:23 ` [dpdk-dev] [PATCH 2/8] app/testpmd: use PCI " Chenbo Xia
2021-09-16  6:10   ` Li, Xiaoyun
2021-09-16  6:38     ` Xia, Chenbo
2021-09-10  2:23 ` [dpdk-dev] [PATCH 3/8] examples/ethtool: use PCI library API to get PCI address Chenbo Xia
2021-09-10  2:23 ` [dpdk-dev] [PATCH 4/8] examples/kni: remove unused PCI bus header Chenbo Xia
2021-09-17 15:38   ` Ferruh Yigit
2021-09-10  2:23 ` [dpdk-dev] [PATCH 5/8] test/kni: remove setting of PCI ID and address Chenbo Xia
2021-09-10  7:12   ` David Marchand
2021-09-17 15:38   ` Ferruh Yigit
2021-09-10  2:24 ` [dpdk-dev] [PATCH 6/8] examples/ip_pipeline: " Chenbo Xia
2021-09-10  7:18   ` David Marchand
2021-09-10  8:21     ` Xia, Chenbo
2021-09-17  3:09     ` Xia, Chenbo
2021-09-17 11:55       ` David Marchand
2021-09-17 15:37         ` Ferruh Yigit
2021-09-10  2:24 ` [dpdk-dev] [PATCH 7/8] kni: replace unused variable definition with reserved bytes Chenbo Xia
2021-09-10  2:24 ` [dpdk-dev] [PATCH 8/8] bus/pci: remove ABIs in PCI bus Chenbo Xia
2021-09-13 12:06   ` Kinsella, Ray
2021-09-14  8:15   ` Xu, Rosen
2021-09-18  2:24 ` [dpdk-dev] [PATCH v2 0/7] Removal of PCI bus ABIs Chenbo Xia
2021-09-18  2:24   ` [dpdk-dev] [PATCH v2 1/7] bus/pci: add new memory resource access APIs Chenbo Xia
2021-09-18  2:24   ` [dpdk-dev] [PATCH v2 2/7] app/testpmd: use PCI " Chenbo Xia
2021-09-18  2:44     ` Li, Xiaoyun
2021-09-18  2:24   ` [dpdk-dev] [PATCH v2 3/7] examples/ethtool: use PCI library API to get PCI address Chenbo Xia
2021-09-18  2:24   ` [dpdk-dev] [PATCH v2 4/7] examples/kni: remove unused PCI bus header Chenbo Xia
2021-09-18  2:24   ` [dpdk-dev] [PATCH v2 5/7] kni: remove unused PCI info from test and example Chenbo Xia
2021-09-18  2:24   ` [dpdk-dev] [PATCH v2 6/7] kni: replace unused variable definition with reserved bytes Chenbo Xia
2021-09-18  2:24   ` [dpdk-dev] [PATCH v2 7/7] bus/pci: remove ABIs in PCI bus Chenbo Xia
2021-09-29  7:38   ` [dpdk-dev] [PATCH v2 0/7] Removal of PCI bus ABIs Xia, Chenbo
2021-09-30  8:45     ` David Marchand
2021-10-04 13:37       ` David Marchand
2021-10-04 15:56         ` Harris, James R
2021-10-06  4:25           ` Xia, Chenbo
2021-10-08  6:15             ` Liu, Changpeng
2021-10-08  7:08               ` David Marchand
2021-10-08  7:44                 ` Liu, Changpeng
2021-10-11  6:58                   ` Xia, Chenbo
2021-10-11 12:55                     ` Thomas Monjalon
2021-10-12  0:35                       ` Harris, James R [this message]
2021-10-12  7:04                         ` Thomas Monjalon
2021-10-12 16:59                           ` Walker, Benjamin
2021-10-12 18:43                             ` Thomas Monjalon
2021-10-12 19:26                               ` Walker, Benjamin
2021-10-12 21:50                                 ` Thomas Monjalon
2021-10-13 17:56                                   ` Walker, Benjamin
2021-10-13 18:59                                     ` Thomas Monjalon
2021-10-13 22:48                                       ` Walker, Benjamin
2021-10-14  6:41                                         ` Thomas Monjalon
2022-07-11 12:11                                           ` Thomas Monjalon
2021-10-14  2:21                                       ` Xia, Chenbo
2021-10-14  6:41                                         ` Thomas Monjalon
2021-10-14  7:00                                           ` Xia, Chenbo
2021-10-14  7:07                                             ` Thomas Monjalon
2021-10-14  8:07                                               ` Xia, Chenbo
2021-10-14  8:25                                                 ` Thomas Monjalon
2021-10-27 12:03                                                   ` Xia, Chenbo

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