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-j...@8bytes.org/
V2: https://lore.kernel.org/lkml/20190115132257.6426-1-j...@8bytes.org/
V3: https://lore.kernel.org/lkml/20190123163049.24863-1-j...@8bytes.org/
V4: https://lore.kernel.org/lkml/20190129084342.26030-1-j...@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
