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| author | Cristian Marussi <cristian.marussi@arm.com> | 2021-12-20 19:56:40 +0000 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2021-12-21 10:59:37 +0000 |
| commit | bf322084fec30b92423911db0169a3610008fc15 (patch) | |
| tree | d2ccadc3601878e92091ac8275194af67f55de31 /drivers/firmware | |
| parent | 117542b81fe7b12002afc0cfdcf6cdd3ebfc0f18 (diff) | |
| download | linux-bf322084fec30b92423911db0169a3610008fc15.tar.bz2 | |
firmware: arm_scmi: Make optee support sync_cmds_completed_on_ret
Declare each OPTEE SCMI channel as not having a completion_irq so as to
enable polling mode and then enable also .sync_cmds_completed_on_ret flag
in the OPTEE transport descriptor so that real polling is itself
effectively bypassed on the rx path: once the optee command invocation has
successfully returned the core will directly fetch the response from the
shared memory area.
Remove OPTEE SCMI transport specific .poll_done callback support since
real polling is effectively bypassed when .sync_cmds_completed_on_ret is
set.
Add OPTEE SCMI transport specific .mark_txdone callback support in order to
properly handle channel locking along the tx path.
Link: https://lore.kernel.org/r/20211220195646.44498-6-cristian.marussi@arm.com
Cc: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/arm_scmi/optee.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/firmware/arm_scmi/optee.c b/drivers/firmware/arm_scmi/optee.c index 175b39bcd470..f460e12be4ea 100644 --- a/drivers/firmware/arm_scmi/optee.c +++ b/drivers/firmware/arm_scmi/optee.c @@ -363,6 +363,9 @@ static int scmi_optee_chan_setup(struct scmi_chan_info *cinfo, struct device *de if (ret) goto err_close_sess; + /* Enable polling */ + cinfo->no_completion_irq = true; + mutex_lock(&scmi_optee_private->mu); list_add(&channel->link, &scmi_optee_private->channel_list); mutex_unlock(&scmi_optee_private->mu); @@ -423,9 +426,8 @@ static int scmi_optee_send_message(struct scmi_chan_info *cinfo, shmem_tx_prepare(shmem, xfer); ret = invoke_process_smt_channel(channel); - - scmi_rx_callback(cinfo, shmem_read_header(shmem), NULL); - mutex_unlock(&channel->mu); + if (ret) + mutex_unlock(&channel->mu); return ret; } @@ -439,13 +441,11 @@ static void scmi_optee_fetch_response(struct scmi_chan_info *cinfo, shmem_fetch_response(shmem, xfer); } -static bool scmi_optee_poll_done(struct scmi_chan_info *cinfo, - struct scmi_xfer *xfer) +static void scmi_optee_mark_txdone(struct scmi_chan_info *cinfo, int ret) { struct scmi_optee_channel *channel = cinfo->transport_info; - struct scmi_shared_mem *shmem = get_channel_shm(channel, xfer); - return shmem_poll_done(shmem, xfer); + mutex_unlock(&channel->mu); } static struct scmi_transport_ops scmi_optee_ops = { @@ -454,9 +454,9 @@ static struct scmi_transport_ops scmi_optee_ops = { .chan_setup = scmi_optee_chan_setup, .chan_free = scmi_optee_chan_free, .send_message = scmi_optee_send_message, + .mark_txdone = scmi_optee_mark_txdone, .fetch_response = scmi_optee_fetch_response, .clear_channel = scmi_optee_clear_channel, - .poll_done = scmi_optee_poll_done, }; static int scmi_optee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) @@ -562,4 +562,5 @@ const struct scmi_desc scmi_optee_desc = { .max_rx_timeout_ms = 30, .max_msg = 20, .max_msg_size = SCMI_OPTEE_MAX_MSG_SIZE, + .sync_cmds_completed_on_ret = true, }; |