From: Sireesh Kodali <sireeshkodali1@gmail.com>
To: phone-devel@vger.kernel.org,
~postmarketos/upstreaming@lists.sr.ht, dmaengine@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org
Cc: Sireesh Kodali <sireeshkodali1@gmail.com>
Subject: [PATCH 0/1] Add support for metadata in bam_dma
Date: Sun, 19 Sep 2021 20:12:40 +0530 [thread overview]
Message-ID: <20210919144242.31776-1-sireeshkodali1@gmail.com> (raw)
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
next reply other threads:[~2021-09-19 14:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-19 14:42 Sireesh Kodali [this message]
2021-09-19 14:42 ` [PATCH 1/1] dmaengine: qcom: bam_dma: Add support for metadata Sireesh Kodali
-- strict thread matches above, loose matches on Subject: below --
2021-09-19 14:33 [PATCH 0/1] Add support for metadata in bam_dma Sireesh Kodali
2021-09-19 15:52 ` Sirsireesh
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