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[73.185.129.58]) by smtp.gmail.com with ESMTPSA id l6sm192725ilt.34.2020.09.17.10.39.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Sep 2020 10:39:29 -0700 (PDT) From: Alex Elder To: davem@davemloft.net, kuba@kernel.org Cc: evgreen@chromium.org, subashab@codeaurora.org, cpratapa@codeaurora.org, bjorn.andersson@linaro.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v3 0/7] net: ipa: wake up system on RX available Date: Thu, 17 Sep 2020 12:39:19 -0500 Message-Id: <20200917173926.24266-1-elder@linaro.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series arranges for the IPA driver to wake up a suspended system if the IPA hardware has a packet to deliver to the AP. Version 2 replaced the first patch from version 1 with three patches, in response to David Miller's feedback. And based on Bjorn Andersson's feedback on version 2, this version reworks the tracking of IPA clock references. As a result, we no longer need a flag to determine whether a "don't' suspend" clock reference is held (though an bit in a bitmask is still used for a different purpose). In summary: - A refcount_t is used to track IPA clock references where an atomic_t was previously used. (This may go away soon as well, with upcoming work to implement runtime PM.) - We no longer track whether a special reference has been taken to avoid suspending IPA. - A bit in a bitmask is used to ensure we only trigger a system resume once per system suspend. And from the original series: - Suspending endpoints only occurs when suspending the driver, not when dropping the last clock reference. Resuming endpoints is also disconnected from starting the clock. - The IPA SUSPEND interrupt is now a wakeup interrupt. If it fires, it schedules a system resume operation. - The GSI interrupt is no longer a wakeup interrupt. -Alex Alex Elder (7): net: ipa: use refcount_t for IPA clock reference count net: ipa: replace ipa->suspend_ref with a flag bit net: ipa: manage endpoints separate from clock net: ipa: use device_init_wakeup() net: ipa: repurpose CLOCK_HELD flag net: ipa: enable wakeup on IPA interrupt net: ipa: do not enable GSI interrupt for wakeup drivers/net/ipa/gsi.c | 17 +++------ drivers/net/ipa/gsi.h | 1 - drivers/net/ipa/ipa.h | 16 ++++++--- drivers/net/ipa/ipa_clock.c | 28 ++++++--------- drivers/net/ipa/ipa_interrupt.c | 14 ++++++++ drivers/net/ipa/ipa_main.c | 64 +++++++++++++++++---------------- 6 files changed, 74 insertions(+), 66 deletions(-) -- 2.20.1