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PCI/P2PDMA: Simplify bus address mapping API

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Update the pci_p2pdma_bus_addr_map() function to take a direct pointer
to the p2pdma_provider structure instead of the pci_p2pdma_map_state.
This simplifies the API by removing the need for callers to extract
the provider from the state structure.

The change updates all callers across the kernel (block layer, IOMMU,
DMA direct, and HMM) to pass the provider pointer directly, making
the code more explicit and reducing unnecessary indirection. This
also removes the runtime warning check since callers now have direct
control over which provider they use.

Tested-by: Alex Mastro <amastro@fb.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Ankit Agrawal <ankita@nvidia.com>
Link: https://lore.kernel.org/r/20251120-dmabuf-vfio-v9-2-d7f71607f371@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
This commit is contained in:
Leon Romanovsky
2025-11-20 11:28:21 +02:00
committed by Alex Williamson
parent f58ef9d1d1
commit d4504262f7
5 changed files with 9 additions and 10 deletions
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2
block/blk-mq-dma.c
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@@ -85,7 +85,7 @@ static inline bool blk_can_dma_map_iova(struct request *req,
static bool blk_dma_map_bus(struct blk_dma_iter *iter, struct phys_vec *vec)
{
iter->addr = pci_p2pdma_bus_addr_map(&iter->p2pdma, vec->paddr);
iter->addr = pci_p2pdma_bus_addr_map(iter->p2pdma.mem, vec->paddr);
iter->len = vec->len;
return true;
}