linux-kernel - Re: [PATCH v2 00/26] IB: Optimize DMA mapping

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Message-ID: <1484690386.2729.8.camel@sandisk.com>
Date:   Tue, 17 Jan 2017 22:00:00 +0000
From:   Bart Van Assche <Bart.VanAssche@...disk.com>
To:     "alex.estrin@...el.com" <alex.estrin@...el.com>,
        "dledford@...hat.com" <dledford@...hat.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v2 00/26] IB: Optimize DMA mapping

On Tue, 2017-01-17 at 13:48 -0800, Bart Van Assche wrote:
> On Sat, 2017-01-14 at 02:05 +0000, Estrin, Alex wrote:
> > [ ... ]
> > please see hfi1/verbs.c @ hfi1_register_ib_device()  
> > [ ... ]
> 
> Hello Alex,
> 
> I think I figured out what I did wrong: both the hfi1 and the qib drivers need two
> sets of DMA mapping operations. ULPs have to use &dma_virt_ops and the SDMA code
> has to use the PCIe DMA mapping operations. My patch series made the SDMA code use
> dma_virt_ops and that's wrong. The attached patch should fix this. Unfortunately I
> do not have access to a hfi1 or qib test setup. Can you help me by testing the
> attached patch on top of the already posted patches?

Hello Alex,

The wrong version of my patch was attached to previous e-mail. Sorry for this. Please
use the patch attached to this e-mail.

Thanks,

Bart.
View attachment "0001-hfi1-qib-rdmavt-v2-Use-proper-DMA-mapping-operations.patch" of type "text/x-patch" (3587 bytes)