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. Changes since v1: * Rebased onto 6.0 kernel * Patch redone by Vladimir Vladimir Lypak (1): dmaengine: qcom: bam_dma: Add support for metadata drivers/dma/qcom/bam_dma.c | 57 ++++++++++++++++++++++++++++++++ include/linux/dma/qcom_bam_dma.h | 8 +++++ 2 files changed, 65 insertions(+) -- 2.38.1
