From: Greg KH <gregkh@linuxfoundation.org>
To: Christoph Hellwig <hch@lst.de>
Cc: saravanak@google.com, konrad.wilk@oracle.com, marcorr@google.com,
linux-nvme@lists.infradead.org, kbusch@kernel.org,
iommu@lists.linux-foundation.org, erdemaktas@google.com,
jxgao@google.com, robin.murphy@arm.com, m.szyprowski@samsung.com
Subject: Re: [PATCH 1/8] driver core: add a min_align_mask field to struct device_dma_parameters
Date: Thu, 4 Feb 2021 20:44:57 +0100 [thread overview]
Message-ID: <YBxOuScfAXhdcuf/@kroah.com> (raw)
In-Reply-To: <20210204193035.2606838-2-hch@lst.de>
On Thu, Feb 04, 2021 at 08:30:28PM +0100, Christoph Hellwig wrote:
> From: Jianxiong Gao <jxgao@google.com>
>
> Some devices rely on the address offset in a page to function
> correctly (NVMe driver as an example). These devices may use
> a different page size than the Linux kernel. The address offset
> has to be preserved upon mapping, and in order to do so, we
> need to record the page_offset_mask first.
>
> Signed-off-by: Jianxiong Gao <jxgao@google.com>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> include/linux/device.h | 1 +
> include/linux/dma-mapping.h | 16 ++++++++++++++++
> 2 files changed, 17 insertions(+)
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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next prev parent reply other threads:[~2021-02-04 19:45 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-04 19:30 preserve DMA offsets when using swiotlb Christoph Hellwig
2021-02-04 19:30 ` [PATCH 1/8] driver core: add a min_align_mask field to struct device_dma_parameters Christoph Hellwig
2021-02-04 19:44 ` Greg KH [this message]
2021-02-04 19:30 ` [PATCH 2/8] swiotlb: add a io_tlb_offset helper Christoph Hellwig
2021-02-04 19:30 ` [PATCH 3/8] swiotlb: factor out a nr_slots helper Christoph Hellwig
2021-02-04 22:09 ` Robin Murphy
2021-02-05 9:45 ` Christoph Hellwig
2021-02-04 19:30 ` [PATCH 4/8] swiotlb: clean up swiotlb_tbl_unmap_single Christoph Hellwig
2021-02-04 19:30 ` [PATCH 5/8] swiotlb: refactor swiotlb_tbl_map_single Christoph Hellwig
2021-02-04 22:12 ` Robin Murphy
2021-02-05 9:45 ` Christoph Hellwig
2021-02-04 19:30 ` [PATCH 6/8] swiotlb: don't modify orig_addr in swiotlb_tbl_sync_single Christoph Hellwig
2021-02-04 19:30 ` [PATCH 7/8] swiotlb: respect min_align_mask Christoph Hellwig
2021-02-04 23:13 ` Robin Murphy
2021-02-05 10:34 ` Christoph Hellwig
2021-02-04 19:30 ` [PATCH 8/8] nvme-pci: set min_align_mask Christoph Hellwig
2021-02-04 19:32 ` Christoph Hellwig
2021-02-05 11:50 ` preserve DMA offsets when using swiotlb Christoph Hellwig
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