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| author | Paul Cercueil <paul@crapouillou.net> | 2024-06-20 15:27:26 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2024-06-21 13:01:57 +0300 |
| commit | 380afccc2a55e8015adae4266e8beff96ab620be (patch) | |
| tree | 6e503fd27276cda622fbe57a1be6a6fd5da860bb /Documentation/driver-api/dmaengine/provider.rst | |
| parent | 74609e5686701ed8e8adc3082d15f009e327286d (diff) | |
| download | linux-380afccc2a55e8015adae4266e8beff96ab620be.tar.xz | |
Documentation: dmaengine: Document new dma_vec API
Document the dmaengine_prep_peripheral_dma_vec() API function, the
device_prep_peripheral_dma_vec() backend function, and the dma_vec
struct.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20240620122726.41232-8-paul@crapouillou.net
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation/driver-api/dmaengine/provider.rst')
| -rw-r--r-- | Documentation/driver-api/dmaengine/provider.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/driver-api/dmaengine/provider.rst b/Documentation/driver-api/dmaengine/provider.rst index ceac2a300e32..3085f8b460fa 100644 --- a/Documentation/driver-api/dmaengine/provider.rst +++ b/Documentation/driver-api/dmaengine/provider.rst @@ -433,6 +433,12 @@ supported. - residue: Provides the residue bytes of the transfer for those that support residue. +- ``device_prep_peripheral_dma_vec`` + + - Similar to ``device_prep_slave_sg``, but it takes a pointer to a + array of ``dma_vec`` structures, which (in the long run) will replace + scatterlists. + - ``device_issue_pending`` - Takes the first transaction descriptor in the pending queue, @@ -544,6 +550,10 @@ dma_cookie_t - Not really relevant any more since the introduction of ``virt-dma`` that abstracts it away. +dma_vec + +- A small structure that contains a DMA address and length. + DMA_CTRL_ACK - If clear, the descriptor cannot be reused by provider until the |