soc: qcom: ipa: the generic software interface

This patch includes "gsi.c", which implements the generic software
interface (GSI) for IPA.  The generic software interface abstracts
channels, which provide a means of transferring data either from the
AP to the IPA, or from the IPA to the AP.  A ring buffer of "transfer
elements" (TREs) is used to describe data transfers to perform.  The
AP writes a doorbell register associated with a channel to let it know
it has added new entries (for an AP->IPA channel) or has finished
processing entries (for an IPA->AP channel).

Each channel also has an event ring buffer, used by the IPA to
communicate information about events related to a channel (for
example, the completion of TREs).  The IPA writes its own doorbell
register, which triggers an interrupt on the AP, to signal that
new event information has arrived.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

This commit is contained in:

Alex Elder

2020-03-05 22:28:21 -06:00

коммит произвёл

David S. Miller

Родитель ca48b27be7

Коммит 650d160382

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drivers/net/ipa/gsi.c Normal file

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soc: qcom: ipa: the generic software interface

2055 drivers/net/ipa/gsi.c Normal file Просмотреть файл

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drivers/net/ipa/gsi.c Normal file

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