netdev - 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 15:01:48 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Michal Kalderon <michal.kalderon@...vell.com>
Cc:     ariel.elior@...vell.com, dledford@...hat.com, galpress@...zon.com,
        linux-rdma@...r.kernel.org, davem@...emloft.net,
        netdev@...r.kernel.org, Bernard Metzler <bmt@...ich.ibm.com>
Subject: Re: [PATCH v6 rdma-next 0/6] RDMA/qedr: Use the doorbell overflow
 recovery mechanism for RDMA

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

Thanks,
Jason