Starting with IPA v4.2, endpoint DELAY mode (which prevents data transfer on TX endpoints) does not work properly. To address this, changes were made to allow underlying GSI channels to be put into a "flow controlled" state, which achieves a similar objective. The first patch in this series implements the flow controlled channel state and the commands used to control it. It arranges to use the new mechanism--instead of DELAY mode--for IPA v4.2+. In IPA v4.11, the notion of GSI channel flow control was enhanced, and implemented in a slightly different way. For the most part this doesn't affect the way the IPA driver uses flow control, but the second patch adds support for the newer mechanism. -Alex Alex Elder (2): net: ipa: introduce channel flow control net: ipa: support enhanced channel flow control drivers/net/ipa/gsi.c | 70 ++++++++++++++++++++++++++-------- drivers/net/ipa/gsi.h | 10 +++++ drivers/net/ipa/gsi_reg.h | 4 ++ drivers/net/ipa/ipa_endpoint.c | 50 ++++++++++++++---------- 4 files changed, 99 insertions(+), 35 deletions(-) -- 2.32.0
