Sometimes a client may detect that a channel has clogged up and is not
responding to requests in time. In such case, the client may want to
initiate a debug on the controller that might help debug and analyze the
reasons for the clog.
Change-Id: Ib15db652e780790f0eaa4f6ada7ad9defed99a65
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
In addition to the requests that have to be sent to the remote processor
through the mailbox controller, there may be data, that may need to be
sent to the controller, but not the remote processor, atleast right
away. Such data need not be buffered by the mailbox framework. Since
data is also not sent to the remote processor immediately,
acknowlegement will not be expected by the mailbox framework.
Change-Id: I6b6e81f593af0ed1cadde269624ebfa2a1591f5b
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
Power drivers that are interested in knowing the current state of the
controller so they can turn down idle states may do so using the
->is_idle() callback on the controller. The call will default to false,
if the controller does not support the ->is_idle callback.
Change-Id: Idf4290d3a651604c8637425abfa25cedc9a02d10
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
This patch supplies a new framework API; mbox_request_channel_byname().
It works by supplying the usual client pointer as the first argument and
a string as the second. The API will search the client's node for a
'mbox-names' property then request a channel in the normal way using the
requested string's index as the expected second 'index' argument.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
If the mailbox controller expects the payload is in place before
initiating the transmit, then it's impossible to reuse the list
maintained by core mailbox code currently. Maintaining another list
for sending the message in the controller seems totally unnecessary
as core mailbox library already provides that feature.
This patch introduces tx_prepare callback in mbox_client which
can be used by the core mailbox library before initiating the
transaction through mbox->ops->send_data. The client driver can
implement this callback to ensure the payload is copied to the
shared memory.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Introduce common framework for client/protocol drivers and
controller drivers of Inter-Processor-Communication (IPC).
Client driver developers should have a look at
include/linux/mailbox_client.h to understand the part of
the API exposed to client drivers.
Similarly controller driver developers should have a look
at include/linux/mailbox_controller.h
Reviewed-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
