RDMA/cxgb4: use dma_mmap_coherent() for mapping non-contiguous memory

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dma_alloc_coherent() allocates contiguous memory irrespective of
iommu mode, but after commit f5ff79fddf ("dma-mapping: remove CONFIG_DMA_REMAP")
if iommu is enabled in translate mode, dma_alloc_coherent() may
allocate non-contiguous memory. Attempt to map this memory results in panic.
This patch fixes the issue by using dma_mmap_coherent() to map each page
to user space.

Signed-off-by: Anumula Murali Mohan Reddy <anumula@chelsio.com>
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Link: https://lore.kernel.org/r/20240716142532.97423-1-anumula@chelsio.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

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This commit is contained in:

Anumula Murali Mohan Reddy 2024-07-16 19:55:32 +05:30 • committed by Leon Romanovsky

parent 8400291e28

commit 75ab1533d7

4 changed files with 105 additions and 38 deletions

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8

drivers/infiniband/hw/cxgb4/cq.c

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36

drivers/infiniband/hw/cxgb4/iw_cxgb4.h

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71

drivers/infiniband/hw/cxgb4/provider.c

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32

drivers/infiniband/hw/cxgb4/qp.c

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