Hi Jassi,
On 1 August 2014 08:31, Jassi Brar <jaswinder.singh@xxxxxxxxxx> wrote:
> 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
>
> Signed-off-by: Jassi Brar <jaswinder.singh@xxxxxxxxxx>
> ---
> MAINTAINERS | 8 +
> drivers/mailbox/Makefile | 4 +
> drivers/mailbox/mailbox.c | 466 +++++++++++++++++++++++++++++++++++++
> include/linux/mailbox_client.h | 46 ++++
> include/linux/mailbox_controller.h | 135 +++++++++++
> 5 files changed, 659 insertions(+)
> create mode 100644 drivers/mailbox/mailbox.c
> create mode 100644 include/linux/mailbox_client.h
> create mode 100644 include/linux/mailbox_controller.h
>
[..]
> +
> +static void poll_txdone(unsigned long data)
> +{
> + struct mbox_controller *mbox = (struct mbox_controller *)data;
> + bool txdone, resched = false;
> + int i;
> +
> + for (i = 0; i < mbox->num_chans; i++) {
> + struct mbox_chan *chan = &mbox->chans[i];
> +
> + if (chan->active_req && chan->cl) {
> + resched = true;
> + txdone = chan->mbox->ops->last_tx_done(chan);
> + if (txdone)
> + tx_tick(chan, 0);
> + }
> + }
> +
> + if (resched)
> + mod_timer(&mbox->poll, jiffies +
> + msecs_to_jiffies(mbox->period));
While preparing a different patch which uses the Mbox framework, I
noticed that mbox->period might not be initialized anywhere. Also, how
is mbox->txpoll_period to be used? It appears from the description of
txpoll_period in mbox_controller.h that you'd want to use that value
in the mod_timer above, or equate the two somewhere in the controller
registration or eliminate one of the two. FWIW I also looked at your
code in [1].
Thanks,
Ashwin
[1] - http://git.linaro.org/landing-teams/working/fujitsu/integration.git/shortlog/refs/heads/mailbox-for-next
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