[PATCHv2 2/2] blk-mq-dma: bring back p2p request flags

[Leon Romanovsky]

On Tue, Sep 02, 2025 at 01:01:21PM -0700, Keith Busch wrote:
> From: Keith Busch <kbusch at kernel.org>
> 
> We need to consider data and metadata dma mapping types separately. The
> request and bio integrity payload have enough flag bits to internally
> track the mapping type for each. Use these so the caller doesn't need to
> track them, and provide separete request and integrity helpers to the
> common code. This will make it easier to scale new mappings, like the
> proposed MMIO attribute, without burdening the caller to track such
> things.
> 
> Signed-off-by: Keith Busch <kbusch at kernel.org>
> ---
>  block/blk-mq-dma.c            |  4 ++++
>  drivers/nvme/host/pci.c       | 21 ++++-----------------
>  include/linux/bio-integrity.h |  1 +
>  include/linux/blk-integrity.h | 14 ++++++++++++++
>  include/linux/blk-mq-dma.h    | 11 +++++++++--
>  include/linux/blk_types.h     |  2 ++
>  6 files changed, 34 insertions(+), 19 deletions(-)
> 

Thanks,
Reviewed-by: Leon Romanovsky <leonro at nvidia.com>