Hi,
here is the third version of this patch-set. Previous
versions can be found here:
V1: https://lore.kernel.org/lkml/[email protected]/
V2: https://lore.kernel.org/lkml/[email protected]/
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 v2 are:
* Check if SWIOTLB is active before returning its limit in
dma_direct_max_mapping_size()
* Only apply the maximum segment limit in virtio-blk when
DMA-API is used for the vring
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
drivers/block/virtio_blk.c | 10 ++++++----
drivers/virtio/virtio_ring.c | 10 ++++++++++
include/linux/dma-mapping.h | 16 ++++++++++++++++
include/linux/swiotlb.h | 11 +++++++++++
include/linux/virtio.h | 2 ++
kernel/dma/direct.c | 11 +++++++++++
kernel/dma/swiotlb.c | 10 ++++++++++
7 files changed, 66 insertions(+), 4 deletions(-)
--
2.17.1
