[PATCHv4 0/8] blk-mq: introduce blk_map_iter

[Keith Busch]

From: Keith Busch <kbusch at kernel.org>

Previous version:

  https://lore.kernel.org/linux-nvme/20250729143442.2586575-1-kbusch@meta.com/

Changes since v3:

 - Fixed special vec handling

 - Fixed address check for dma_mapping_error

 - Fixed nvme leaks on dma iteration errror

 - Added an nvme prep patch to reduce code duplication when unmaping
   sgl's

 - On the last patch, I retained the previous MPTR setup for when a
   single integrity segment exists for non-user requests. A code comment
   in the data path claims that is more efficient than the DMA iterator.

Keith Busch (8):
  blk-mq-dma: introduce blk_map_iter
  blk-mq-dma: provide the bio_vec list 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-pci: create common sgl unmapping helper
  nvme-pci: convert metadata mapping to dma iter

 block/bio.c                   |   2 +-
 block/blk-mq-dma.c            | 237 ++++++++++++++++++++--------------
 drivers/nvme/host/pci.c       | 190 +++++++++++++++------------
 include/linux/blk-integrity.h |  17 +++
 include/linux/blk-mq-dma.h    |  16 ++-
 include/linux/blk_types.h     |   1 -
 6 files changed, 279 insertions(+), 184 deletions(-)

-- 
2.47.3