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| author | Jianxiong Gao <jxgao@google.com> | 2021-02-01 21:30:15 +0300 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2021-02-20 18:13:26 +0300 |
| commit | 36950f2da1ea4cb683be174f6f581e25b2d33e71 (patch) | |
| tree | a943c6554cd4ca9eaa3a8f82045d14552d96c5ce /include/linux/device.h | |
| parent | 66e8d3b8995c05cb1e17b120f52e0218bc534a49 (diff) | |
| download | linux-36950f2da1ea4cb683be174f6f581e25b2d33e71.tar.xz | |
driver core: add a min_align_mask field to struct device_dma_parameters
Some devices rely on the address offset in a page to function
correctly (NVMe driver as an example). These devices may use
a different page size than the Linux kernel. The address offset
has to be preserved upon mapping, and in order to do so, we
need to record the page_offset_mask first.
Signed-off-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'include/linux/device.h')
| -rw-r--r-- | include/linux/device.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 1779f90eeb4c..7960bf516dd7 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -291,6 +291,7 @@ struct device_dma_parameters { * sg limitations. */ unsigned int max_segment_size; + unsigned int min_align_mask; unsigned long segment_boundary_mask; }; |