[SeaBIOS] [PATCH v4 0/3] virtio-blk: add feature VIRTIO_BLK_F_SIZE_MAX

[Andy Pei]

if driver reads data larger than VIRTIO_BLK_F_SIZE_MAX, it will cause
some issue to the DMA engine.
So add VIRTIO_BLK_F_SIZE_MAX feature support, when upper software
wants to read data larger than VIRTIO_BLK_F_SIZE_MAX, virtio-blk
driver split one large request into multiple smaller ones.

Andy Pei (3):
  virtio-blk: add feature VIRTIO_BLK_F_SIZE_MAX and VIRTIO_BLK_F_SEG_MAX
  virtio-blk: abstract a function named virtio_blk_op_one_segment to
    handle r/w request
  virtio-blk.: split large IO according to size_max

src/block.h         |   2 +
 src/hw/virtio-blk.c | 128 +++++++++++++++++++++++++++++++++++++++++-----------
 src/hw/virtio-blk.h |   3 ++
 3 files changed, 107 insertions(+), 26 deletions(-)