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

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Message-ID: <20190503155306.GA6461@e121166-lin.cambridge.arm.com>
Date:   Fri, 3 May 2019 16:53:06 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Srinath Mannam <srinath.mannam@...adcom.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-list@...adcom.com, linux-pci@...r.kernel.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 0/3] PCIe Host request to reserve IOVA

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