netdev - Re: [RFC 12/20] RDMA/irdma: Implement device supported verb APIs

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Date:   Thu, 26 Sep 2019 17:40:05 +0000
From:   Jason Gunthorpe <jgg@...lanox.com>
To:     Leon Romanovsky <leon@...nel.org>
CC:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        "dledford@...hat.com" <dledford@...hat.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        Mustafa Ismail <mustafa.ismail@...el.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        Shiraz Saleem <shiraz.saleem@...el.com>
Subject: Re: [RFC 12/20] RDMA/irdma: Implement device supported verb APIs

On Thu, Sep 26, 2019 at 08:37:10PM +0300, Leon Romanovsky wrote:
> On Thu, Sep 26, 2019 at 09:45:11AM -0700, Jeff Kirsher wrote:
> > From: Mustafa Ismail <mustafa.ismail@...el.com>
> >
> > Implement device supported verb APIs. The supported APIs
> > vary based on the underlying transport the ibdev is
> > registered as (i.e. iWARP or RoCEv2).
> >
> > Signed-off-by: Mustafa Ismail <mustafa.ismail@...el.com>
> > Signed-off-by: Shiraz Saleem <shiraz.saleem@...el.com>
> >  drivers/infiniband/hw/irdma/verbs.c      | 4346 ++++++++++++++++++++++
> >  drivers/infiniband/hw/irdma/verbs.h      |  199 +
> >  include/uapi/rdma/rdma_user_ioctl_cmds.h |    1 +
> >  3 files changed, 4546 insertions(+)
> >  create mode 100644 drivers/infiniband/hw/irdma/verbs.c
> >  create mode 100644 drivers/infiniband/hw/irdma/verbs.h
> >
> > diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
> > new file mode 100644
> > index 000000000000..025c21c722e2
> > +++ b/drivers/infiniband/hw/irdma/verbs.c
> > @@ -0,0 +1,4346 @@
> > +// SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
> > +/* Copyright (c) 2019, Intel Corporation. */
> 
> <...>
> 
> > +
> > +	size = sqdepth * sizeof(struct irdma_sq_uk_wr_trk_info) +
> > +	       (rqdepth << 3);
> > +	iwqp->kqp.wrid_mem = kzalloc(size, GFP_KERNEL);

This weird allocation math also looks sketchy, should it be using one
of the various anti-overflow helpers, or maybe a flex array?

Jason