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Subject[PATCH 0/5 v5] Fix virtio-blk issue with SWIOTLB
Date
Hi,

here is the next version of this patch-set. Previous
versions can be found here:

V1: https://lore.kernel.org/lkml/20190110134433.15672-1-joro@8bytes.org/

V2: https://lore.kernel.org/lkml/20190115132257.6426-1-joro@8bytes.org/

V3: https://lore.kernel.org/lkml/20190123163049.24863-1-joro@8bytes.org/

V4: https://lore.kernel.org/lkml/20190129084342.26030-1-joro@8bytes.org/

The problem solved here is a limitation of the SWIOTLB implementation,
which does not support allocations larger than 256kb. When the
virtio-blk driver tries to read/write a block larger than that, the
allocation of the dma-handle fails and an IO error is reported.

Changes to v4 are:

- Added Reviewed-by tags from Christoph

- Added missing EXPORT_SYMBOL(_GPL) lines

Please review.

Thanks,

Joerg
Joerg Roedel (5):
swiotlb: Introduce swiotlb_max_mapping_size()
swiotlb: Add is_swiotlb_active() function
dma: Introduce dma_max_mapping_size()
virtio: Introduce virtio_max_dma_size()
virtio-blk: Consider virtio_max_dma_size() for maximum segment size

Documentation/DMA-API.txt | 8 ++++++++
drivers/block/virtio_blk.c | 10 ++++++----
drivers/virtio/virtio_ring.c | 11 +++++++++++
include/linux/dma-mapping.h | 16 ++++++++++++++++
include/linux/swiotlb.h | 11 +++++++++++
include/linux/virtio.h | 2 ++
kernel/dma/direct.c | 12 ++++++++++++
kernel/dma/swiotlb.c | 14 ++++++++++++++
8 files changed, 80 insertions(+), 4 deletions(-)

--
2.17.1

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