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| author | Ben Walker <benjamin.walker@intel.com> | 2022-03-01 19:25:48 +0100 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2022-04-20 13:58:12 +0200 |
| commit | fc44ff0ae9f2aa20b64c4e63ab4614156df80240 (patch) | |
| tree | 0b27142d92dd94e768a4d075b43df4628be831ea /Documentation/driver-api | |
| parent | dmaengine: idxd: move wq irq enabling to after device enable (diff) | |
| download | linux-fc44ff0ae9f2aa20b64c4e63ab4614156df80240.tar.xz linux-fc44ff0ae9f2aa20b64c4e63ab4614156df80240.zip | |
dmaengine: Document dmaengine_prep_dma_memset
Document this function to make clear the expected behavior of the
'value' parameter. It was intended to match the behavior of POSIX memset
as laid out here:
https://lore.kernel.org/dmaengine/YejrA5ZWZ3lTRO%2F1@matsya/
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Link: https://lore.kernel.org/r/20220301182551.883474-2-benjamin.walker@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation/driver-api')
| -rw-r--r-- | Documentation/driver-api/dmaengine/provider.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/driver-api/dmaengine/provider.rst b/Documentation/driver-api/dmaengine/provider.rst index d3fa80e333b1..1e0f1f85d10e 100644 --- a/Documentation/driver-api/dmaengine/provider.rst +++ b/Documentation/driver-api/dmaengine/provider.rst @@ -206,6 +206,12 @@ Currently, the types available are: - The device is able to perform parity check using RAID6 P+Q algorithm against a memory buffer. +- DMA_MEMSET + + - The device is able to fill memory with the provided pattern + + - The pattern is treated as a single byte signed value. + - DMA_INTERRUPT - The device is able to trigger a dummy transfer that will |