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| author | John Garry <john.garry@huawei.com> | 2022-06-23 15:41:59 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-06-28 05:43:57 +0300 |
| commit | fce54ed027577517df1e74b7d54dc2b1bd536887 (patch) | |
| tree | 28c076de3f2e2d53019c72ed51f2a54994bd0e4c /block/blk-ia-ranges.c | |
| parent | aeaadcde1a60138bceb65de3cdaeec78170b4459 (diff) | |
| download | linux-fce54ed027577517df1e74b7d54dc2b1bd536887.tar.xz | |
scsi: hisi_sas: Limit max hw sectors for v3 HW
If the controller is behind an IOMMU then the IOMMU IOVA caching range can
affect performance, as discussed in [0].
Limit the max HW sectors to not exceed this limit. We need to hardcode the
value until a proper DMA mapping API is available.
[0] https://lore.kernel.org/linux-iommu/20210129092120.1482-1-thunder.leizhen@huawei.com/
Link: https://lore.kernel.org/r/1655988119-223714-1-git-send-email-john.garry@huawei.com
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'block/blk-ia-ranges.c')
0 files changed, 0 insertions, 0 deletions