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Message-Id: <20201008143722.21888-2-etienne.carriere@linaro.org>
Date: Thu, 8 Oct 2020 16:37:19 +0200
From: Etienne Carriere <etienne.carriere@...aro.org>
To: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org,
Sudeep Holla <sudeep.holla@....com>,
Cristian Marussi <cristian.marussi@....com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Souvik Chakravarty <Souvik.Chakravarty@....com>,
Etienne Carriere <etienne.carriere@...aro.org>
Subject: [PATCH 2/5] firmware: arm_scmi: fix transfer missing re-initialization
Implement helper function scmi_do_xfer_again() to process consecutive
transfers that are initialized only once with scmi_xfer_get_init()
and hence get the pool completion and responses message length not
reloaded regarding last completed transfer.
Signed-off-by: Etienne Carriere <etienne.carriere@...aro.org>
---
drivers/firmware/arm_scmi/base.c | 2 +-
drivers/firmware/arm_scmi/clock.c | 2 +-
drivers/firmware/arm_scmi/common.h | 2 ++
drivers/firmware/arm_scmi/driver.c | 10 ++++++++++
drivers/firmware/arm_scmi/perf.c | 2 +-
drivers/firmware/arm_scmi/sensors.c | 2 +-
6 files changed, 16 insertions(+), 4 deletions(-)
diff --git a/drivers/firmware/arm_scmi/base.c b/drivers/firmware/arm_scmi/base.c
index 9853bd3c4d45..508f214baa1b 100644
--- a/drivers/firmware/arm_scmi/base.c
+++ b/drivers/firmware/arm_scmi/base.c
@@ -183,7 +183,7 @@ static int scmi_base_implementation_list_get(const struct scmi_handle *handle,
/* Set the number of protocols to be skipped/already read */
*num_skip = cpu_to_le32(tot_num_ret);
- ret = scmi_do_xfer(handle, t);
+ ret = scmi_do_xfer_again(handle, t);
if (ret)
break;
diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c
index c1cfe3ee3d55..9bb54c1a8d55 100644
--- a/drivers/firmware/arm_scmi/clock.c
+++ b/drivers/firmware/arm_scmi/clock.c
@@ -161,7 +161,7 @@ scmi_clock_describe_rates_get(const struct scmi_handle *handle, u32 clk_id,
/* Set the number of rates to be skipped/already read */
clk_desc->rate_index = cpu_to_le32(tot_rate_cnt);
- ret = scmi_do_xfer(handle, t);
+ ret = scmi_do_xfer_again(handle, t);
if (ret)
goto err;
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index 37fb583f1bf5..6d4eea7b0f3e 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -143,6 +143,8 @@ struct scmi_xfer {
void scmi_xfer_put(const struct scmi_handle *h, struct scmi_xfer *xfer);
int scmi_do_xfer(const struct scmi_handle *h, struct scmi_xfer *xfer);
+int scmi_do_xfer_again(const struct scmi_handle *handle,
+ struct scmi_xfer *xfer);
int scmi_do_xfer_with_response(const struct scmi_handle *h,
struct scmi_xfer *xfer);
int scmi_xfer_get_init(const struct scmi_handle *h, u8 msg_id, u8 prot_id,
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index c5dea87edf8f..887cb8249db0 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -402,6 +402,16 @@ int scmi_do_xfer(const struct scmi_handle *handle, struct scmi_xfer *xfer)
return ret;
}
+int scmi_do_xfer_again(const struct scmi_handle *handle, struct scmi_xfer *xfer)
+{
+ struct scmi_info *info = handle_to_scmi_info(handle);
+
+ xfer->rx.len = info->desc->max_msg_size;
+ xfer->hdr.poll_completion = false;
+
+ return scmi_do_xfer(handle, xfer);
+}
+
#define SCMI_MAX_RESPONSE_TIMEOUT (2 * MSEC_PER_SEC)
/**
diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index ed475b40bd08..66d3d8459936 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -281,7 +281,7 @@ scmi_perf_describe_levels_get(const struct scmi_handle *handle, u32 domain,
/* Set the number of OPPs to be skipped/already read */
dom_info->level_index = cpu_to_le32(tot_opp_cnt);
- ret = scmi_do_xfer(handle, t);
+ ret = scmi_do_xfer_again(handle, t);
if (ret)
break;
diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c
index 9703cf6356a0..97addcf828a3 100644
--- a/drivers/firmware/arm_scmi/sensors.c
+++ b/drivers/firmware/arm_scmi/sensors.c
@@ -134,7 +134,7 @@ static int scmi_sensor_description_get(const struct scmi_handle *handle,
/* Set the number of sensors to be skipped/already read */
put_unaligned_le32(desc_index, t->tx.buf);
- ret = scmi_do_xfer(handle, t);
+ ret = scmi_do_xfer_again(handle, t);
if (ret)
break;
--
2.17.1
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