Messages in this thread | | | From | Sireesh Kodali <> | Subject | [PATCH 0/1] Add support for metadata in bam_dma | Date | Sun, 19 Sep 2021 20:03:10 +0530 |
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IPA v2.x uses BAM to send and receive IP packets, to and from the AP. However, unlike its predecessor BAM-DMUX, it doesn't send information about the packet length. To find the length of the packet, one must instead read the bam_desc metadata. This patch adds support for sending the size metadata over the dmaengine metadata api. Currently only the dma size is stored in the metadata. Only client-side metadata is supported for now, because host-side metadata doesn't make sense for IPA, where more than one DMA descriptors could be waiting to be acked and processed.
Sireesh Kodali (1): dmaengine: qcom: bam_dma: Add support for metadata
drivers/dma/qcom/bam_dma.c | 74 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+)
-- 2.33.0
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