From: Tingwei Zhang <tingwei@codeaurora.org>
To: Mathieu Poirier <mathieu.poirier@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: tsoni@codeaurora.org,
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
coresight@lists.linaro.org, Mao Jinlong <jinlmao@codeaurora.org>,
Tingwei Zhang <tingwei@codeaurora.org>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH] coresight: stm: support marked packet
Date: Sun, 19 Jul 2020 14:27:12 +0800 [thread overview]
Message-ID: <20200719062712.29133-1-tingwei@codeaurora.org> (raw)
STP_PACKET_MARKED is not supported by STM currently.
Add STM_FLAG_MARKED to support marked packet in STM.
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
drivers/hwtracing/coresight/coresight-stm.c | 11 +++++++----
include/uapi/linux/coresight-stm.h | 1 +
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index b908ca104645..36fb1838b1d1 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -412,6 +412,7 @@ static ssize_t notrace stm_generic_packet(struct stm_data *stm_data,
void __iomem *ch_addr;
struct stm_drvdata *drvdata = container_of(stm_data,
struct stm_drvdata, stm);
+ unsigned int stm_flags;
if (!(drvdata && local_read(&drvdata->mode)))
return -EACCES;
@@ -421,8 +422,10 @@ static ssize_t notrace stm_generic_packet(struct stm_data *stm_data,
ch_addr = stm_channel_addr(drvdata, channel);
- flags = (flags == STP_PACKET_TIMESTAMPED) ? STM_FLAG_TIMESTAMPED : 0;
- flags |= test_bit(channel, drvdata->chs.guaranteed) ?
+ stm_flags = (flags & STP_PACKET_TIMESTAMPED) ?
+ STM_FLAG_TIMESTAMPED : 0;
+ stm_flags |= (flags & STP_PACKET_MARKED) ? STM_FLAG_MARKED : 0;
+ stm_flags |= test_bit(channel, drvdata->chs.guaranteed) ?
STM_FLAG_GUARANTEED : 0;
if (size > drvdata->write_bytes)
@@ -432,7 +435,7 @@ static ssize_t notrace stm_generic_packet(struct stm_data *stm_data,
switch (packet) {
case STP_PACKET_FLAG:
- ch_addr += stm_channel_off(STM_PKT_TYPE_FLAG, flags);
+ ch_addr += stm_channel_off(STM_PKT_TYPE_FLAG, stm_flags);
/*
* The generic STM core sets a size of '0' on flag packets.
@@ -444,7 +447,7 @@ static ssize_t notrace stm_generic_packet(struct stm_data *stm_data,
break;
case STP_PACKET_DATA:
- ch_addr += stm_channel_off(STM_PKT_TYPE_DATA, flags);
+ ch_addr += stm_channel_off(STM_PKT_TYPE_DATA, stm_flags);
stm_send(ch_addr, payload, size,
drvdata->write_bytes);
break;
diff --git a/include/uapi/linux/coresight-stm.h b/include/uapi/linux/coresight-stm.h
index 8847dbf24151..7ff3709c01b8 100644
--- a/include/uapi/linux/coresight-stm.h
+++ b/include/uapi/linux/coresight-stm.h
@@ -5,6 +5,7 @@
#include <linux/const.h>
#define STM_FLAG_TIMESTAMPED _BITUL(3)
+#define STM_FLAG_MARKED _BITUL(4)
#define STM_FLAG_GUARANTEED _BITUL(7)
/*
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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next reply other threads:[~2020-07-19 6:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-19 6:27 Tingwei Zhang [this message]
2020-07-21 17:12 ` [PATCH] coresight: stm: support marked packet Mathieu Poirier
2020-07-21 23:35 ` tingwei
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