[PATCHv2 0/7] blk dma iter for metadata

[Keith Busch]

From: Keith Busch <kbusch at kernel.org>

Here's a new take on the dma iteration for integrity requests.

The current code still has the integrity payloads subscribe to the
"virt_boundary" queue limit when considering merging and coalescing in
iova space. This is an unnecessary limit for nvme-pci metadata SGLs, and
it currently makes testing merges a bit difficult.

Changes since v1:

  Provided a bunch of prep patches to make the current dma iteration
  more generic to reduce code duplication with integrity metadata.

  An nvme optimization for single or coalesced segments

Keith Busch (7):
  blk-mq-dma: move the bio and bvec_iter to blk_dma_iter
  blk-mq-dma: set the bvec being iterated
  blk-mq-dma: require unmap caller provide p2p map type
  blk-mq: remove REQ_P2PDMA flag
  blk-mq-dma: move common dma start code to a helper
  blk-mq-dma: add support for mapping integrity metadata
  nvme: convert metadata mapping to dma iter

 block/bio.c                   |   2 +-
 block/blk-mq-dma.c            | 173 ++++++++++++++++++++++------------
 drivers/nvme/host/pci.c       | 135 +++++++++++++-------------
 include/linux/blk-integrity.h |  17 ++++
 include/linux/blk-mq-dma.h    |  10 +-
 include/linux/blk_types.h     |   1 -
 6 files changed, 207 insertions(+), 131 deletions(-)

-- 
2.47.1