netdev - RE: [EXT] Re: [PATCH v6 rdma-next 0/6] RDMA/qedr: Use the doorbell overflow recovery mechanism for RDMA

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Date:   Thu, 25 Jul 2019 19:40:39 +0000
From:   Michal Kalderon <mkalderon@...vell.com>
To:     Jason Gunthorpe <jgg@...pe.ca>
CC:     Ariel Elior <aelior@...vell.com>,
        "dledford@...hat.com" <dledford@...hat.com>,
        "galpress@...zon.com" <galpress@...zon.com>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Bernard Metzler <bmt@...ich.ibm.com>
Subject: RE: [EXT] Re: [PATCH v6 rdma-next 0/6] RDMA/qedr: Use the doorbell
 overflow recovery mechanism for RDMA

> From: Jason Gunthorpe <jgg@...pe.ca>
> Sent: Thursday, July 25, 2019 9:02 PM
> 
> External Email
> 
> ----------------------------------------------------------------------
> On Tue, Jul 09, 2019 at 05:17:29PM +0300, Michal Kalderon wrote:
> > This patch series uses the doorbell overflow recovery mechanism
> > introduced in commit 36907cd5cd72 ("qed: Add doorbell overflow
> > recovery mechanism") for rdma ( RoCE and iWARP )
> >
> > The first three patches modify the core code to contain helper
> > functions for managing mmap_xa inserting, getting and freeing entries.
> > The code was taken almost as is from the efa driver.
> > There is still an open discussion on whether we should take this even
> > further and make the entire mmap generic. Until a decision is made, I
> > only created the database API and modified the efa and qedr driver to
> > use it. The doorbell recovery code will be based on the common code.
> >
> > Efa driver was compile tested only.
> >
> > rdma-core pull request #493
> >
> > Changes from V5:
> > - Switch between driver dealloc_ucontext and mmap_entries_remove.
> > - No need to verify the key after using the key to load an entry from
> >   the mmap_xa.
> > - Change mmap_free api to pass an 'entry' object.
> > - Add documentation for mmap_free and for newly exported functions.
> > - Fix some extra/missing line breaks.
> 
> Lets do SIW now as well, it has the same xa scheme copied from EFA
ok
> 
> Thanks,
> Jason