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Merge branch 'p2pdma-mmio-6.19.v5' into for-6.19/block

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Merge MMIO P2P DMA series from Leon:

"This patch series improves block layer and NVMe driver support for MMIO
 memory regions, particularly for peer-to-peer (P2P) DMA transfers that
 go through the host bridge.

 The series addresses a critical gap where P2P transfers through the
 host bridge (PCI_P2PDMA_MAP_THRU_HOST_BRIDGE) were not properly marked
 as MMIO memory, leading to potential issues with:

 - Inappropriate CPU cache synchronization operations on MMIO regions
 - Incorrect DMA mapping/unmapping that doesn't respect MMIO semantics
 - Missing IOMMU configuration for MMIO memory handling

 This work is extracted from the larger DMA physical API improvement
 series [1] and focuses specifically on block layer and NVMe
 requirements for MMIO memory support.

 [1] https://lore.kernel.org/all/cover.1757423202.git.leonro@nvidia.com/"

Link: https://lore.kernel.org/linux-block/20251114-block-with-mmio-v5-0-69d00f73d766@nvidia.com/
Signed-off-by: Jens Axboe <axboe@kernel.dk>

* p2pdma-mmio-6.19.v5:
  block-dma: properly take MMIO path
  nvme-pci: migrate to dma_map_phys instead of map_page
This commit is contained in:
Jens Axboe 2025-11-14 05:10:09 -07:00
commit fa0d2dc69e
6 changed files with 100 additions and 55 deletions
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