linux-kernel - Re: [PATCH v6 0/3] PCIe Host request to reserve IOVA

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Date:   Fri, 3 May 2019 21:36:44 +0530
From:   Srinath Mannam <srinath.mannam@...adcom.com>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Eric Auger <eric.auger@...hat.com>, poza@...eaurora.org,
        Ray Jui <rjui@...adcom.com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        linux-pci@...r.kernel.org, iommu@...ts.linux-foundation.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 0/3] PCIe Host request to reserve IOVA

Hi Lorenzo,

Thanks a lot.

Regards,
Srinath.

On Fri, May 3, 2019 at 9:23 PM Lorenzo Pieralisi
<lorenzo.pieralisi@....com> wrote:
>
> On Fri, May 03, 2019 at 07:35:31PM +0530, Srinath Mannam wrote:
> > This patch set will reserve IOVA addresses for DMA memory holes.
> >
> > The IPROC host controller allows only a few ranges of physical address
> > as inbound PCI addresses which are listed through dma-ranges DT property.
> > Added dma_ranges list field of PCI host bridge structure to hold these
> > allowed inbound address ranges in sorted order.
> >
> > Process this list and reserve IOVA addresses that are not present in its
> > resource entries (ie DMA memory holes) to prevent allocating IOVA
> > addresses that cannot be allocated as inbound addresses.
> >
> > This patch set is based on Linux-5.1-rc3.
> >
> > Changes from v5:
> >   - Addressed Robin Murphy, Lorenzo review comments.
> >     - Error handling in dma ranges list processing.
> >     - Used commit messages given by Lorenzo to all patches.
> >
> > Changes from v4:
> >   - Addressed Bjorn, Robin Murphy and Auger Eric review comments.
> >     - Commit message modification.
> >     - Change DMA_BIT_MASK to "~(dma_addr_t)0".
> >
> > Changes from v3:
> >   - Addressed Robin Murphy review comments.
> >     - pcie-iproc: parse dma-ranges and make sorted resource list.
> >     - dma-iommu: process list and reserve gaps between entries
> >
> > Changes from v2:
> >   - Patch set rebased to Linux-5.0-rc2
> >
> > Changes from v1:
> >   - Addressed Oza review comments.
> >
> > Srinath Mannam (3):
> >   PCI: Add dma_ranges window list
> >   iommu/dma: Reserve IOVA for PCIe inaccessible DMA address
> >   PCI: iproc: Add sorted dma ranges resource entries to host bridge
> >
> >  drivers/iommu/dma-iommu.c           | 35 ++++++++++++++++++++++++++---
> >  drivers/pci/controller/pcie-iproc.c | 44 ++++++++++++++++++++++++++++++++++++-
> >  drivers/pci/probe.c                 |  3 +++
> >  include/linux/pci.h                 |  1 +
> >  4 files changed, 79 insertions(+), 4 deletions(-)
>
> I have applied the series to pci/iova-dma-ranges, targeting v5.2,
> thanks.
>
> Lorenzo