Hi, Sorry, I accidentally sent this patch twice. Please ignore the second one (i.e. the one I'm replying to now) lkml link to original: https://lkml.org/lkml/2021/9/19/126 Sorry for the inconvenience Sireesh On Sun, Sep 19, 2021 at 8:03 PM Sireesh Kodali <sireeshkodali1@xxxxxxxxx> wrote: > > 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 >
