From: Roland Dreier <roland-BHEL68pLQRGGvPXPguhicg@public.gmane.org>
To: "Hefty, Sean" <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: "linux-rdma
(linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org)"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [RFC] XRC upstream merge reboot
Date: Wed, 18 May 2011 09:44:01 -0700 [thread overview]
Message-ID: <BANLkTimWMU9ohSQGYEEnFR0HbBaypFR51A@mail.gmail.com> (raw)
In-Reply-To: <1828884A29C6694DAF28B7E6B8A82373F7AB-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
On Mon, May 16, 2011 at 2:13 PM, Hefty, Sean <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote:
> libibverbs
> ----------
> We define a new device capability flag IBV_DEVICE_EXT_OPS, indicating that the library supports extended operations. If set, the provider library returns an extended structure from ibv_open_device():
>
> struct ibv_context_ext {
> struct ibv_context context;
> int version;
> struct ibv_ext_ops ext_ops;
> };
>
> The ext_ops will allow for additional operations not provided by ibv_context_ops, for example:
>
> struct ibv_ext_ops {
> int (share_pd)(struct ibv_pd *pd, int fd, int oflags);
> };
>
> In order for libibverbs to check for ext_ops support, it steals a byte from the device name:
>
> /*
> * Support for extended operations is recorded at the end of
> * the name character array.
> */
> #define ext_ops_cap name[IBV_SYSFS_NAME_MAX - 1]
I like this idea of allowing for future extensibility... but if we
could go even a bit further
and have support for named extensions, I think that would be even better. ie
we could define a bunch of new XRC related stuff and then have some interface
to the driver where we ask for the "XRC" extension (by name with a string) then
that would be very handy for the future.
I wonder if a "ummunotify" extension would make integrating ummunotify
stuff into
libibiverbs easier...
This is inspired by my very limited knowledge of OpenGL, so maybe a
more detailed
look at the mechanism there would be helpful.
I think stealing a byte from the name to mark this support might make sense, but
then I would probably go a bit further and change the second parameter of
ibv_register_driver to be an ibv_driver_init_func_ext() so we can extend even
before the open of the driver.
Anyway thanks for rebooting this work, Sean.
- R.
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next prev parent reply other threads:[~2011-05-18 16:44 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-16 21:13 [RFC] XRC upstream merge reboot Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373F7AB-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-05-18 14:54 ` Jack Morgenstein
[not found] ` <201105181754.33759.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-05-18 15:27 ` Hefty, Sean
2011-06-22 7:17 ` Jack Morgenstein
[not found] ` <201106221017.06212.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-06-22 16:14 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373029A95-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-06-22 17:03 ` Jack Morgenstein
[not found] ` <201106222003.50214.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-06-22 18:19 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373029B3F-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-06-22 19:21 ` Jack Morgenstein
[not found] ` <201106222221.05993.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-06-22 19:32 ` Tziporet Koren
2011-06-22 19:57 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373029BDE-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-06-23 6:11 ` Jack Morgenstein
2011-06-23 6:35 ` Jack Morgenstein
[not found] ` <201106230935.07425.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-06-23 18:03 ` Hefty, Sean
2011-07-20 18:51 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373136F63B9-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-07-21 7:38 ` Jack Morgenstein
[not found] ` <201107211038.23000.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-07-21 7:57 ` Jack Morgenstein
2011-07-21 11:58 ` Jeff Squyres
[not found] ` <D8276D45-5FE8-464C-B3A4-14404DE8C760-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2011-07-21 12:47 ` Jack Morgenstein
[not found] ` <201107211547.31850.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-07-21 12:46 ` Jeff Squyres
2011-07-21 16:06 ` Hefty, Sean
2011-07-21 17:53 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373136F6691-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-07-26 20:04 ` Shamis, Pavel
[not found] ` <26AE60A9-D055-4D40-A830-5AADDBA20ED8-1Heg1YXhbW8@public.gmane.org>
2011-08-01 15:03 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373136F9075-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-08-01 16:20 ` Shamis, Pavel
[not found] ` <AE625966-FD97-4DBF-A024-22B83B5F3E39-1Heg1YXhbW8@public.gmane.org>
2011-08-01 18:28 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373136F9194-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-08-02 10:44 ` Jack Morgenstein
[not found] ` <201108021344.25284.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-08-02 16:29 ` Shamis, Pavel
[not found] ` <32D25205-3E9C-4757-B0AB-7117BDF3F2F7-1Heg1YXhbW8@public.gmane.org>
2011-08-03 10:37 ` Jack Morgenstein
[not found] ` <201108031337.24527.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-08-10 22:20 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A8237316E3E55C-Q3cL8pyY+6ukrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-08-11 14:12 ` Shamis, Pavel
2011-08-21 14:42 ` Jack Morgenstein
[not found] ` <201108211742.18803.jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-08-22 15:46 ` Hefty, Sean
2011-08-02 19:08 ` Shamis, Pavel
[not found] ` <EABE213A-448A-45F8-B131-AE1EE3F9547F-1Heg1YXhbW8@public.gmane.org>
2011-08-02 21:25 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373136F962C-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-08-02 23:00 ` Shamis, Pavel
[not found] ` <DE779D97-F54F-45E4-B3D4-DBEB10F9302D-1Heg1YXhbW8@public.gmane.org>
2011-08-02 23:53 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373136F967E-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-08-03 13:47 ` Shamis, Pavel
[not found] ` <5C691E518F345F4882FAB9E9839E60BA0BCA4622F4-vxojlfkN5A++qDdrU24kdQ@public.gmane.org>
2011-08-03 15:52 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373136F97AC-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-08-03 20:22 ` Shamis, Pavel
[not found] ` <5C691E518F345F4882FAB9E9839E60BA0BCA462300-vxojlfkN5A++qDdrU24kdQ@public.gmane.org>
2011-08-03 20:49 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373136F9A13-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-08-03 21:16 ` Shamis, Pavel
[not found] ` <5C691E518F345F4882FAB9E9839E60BA0BCA462301-vxojlfkN5A++qDdrU24kdQ@public.gmane.org>
2011-08-03 21:36 ` Jason Gunthorpe
[not found] ` <20110803213642.GE28465-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-08-04 0:06 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373136F9A7E-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-08-04 4:05 ` Jason Gunthorpe
[not found] ` <20110804040503.GA13935-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-08-04 5:53 ` Hefty, Sean
2011-05-18 16:44 ` Roland Dreier [this message]
[not found] ` <BANLkTimWMU9ohSQGYEEnFR0HbBaypFR51A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-05-18 17:02 ` Jason Gunthorpe
[not found] ` <20110518170226.GA2595-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-05-18 17:30 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373FBC7-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-05-18 18:05 ` Jason Gunthorpe
[not found] ` <20110518180519.GA11860-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-05-18 18:13 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373FC13-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-05-18 18:22 ` Jason Gunthorpe
2011-05-18 19:22 ` Roland Dreier
[not found] ` <BANLkTi=cLjErM3pKzihyFtGWZ0kSu9BiPA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-05-19 5:29 ` Hefty, Sean
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