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Date: Mon, 21 Nov 2022 16:21:10 +0800
From: Tao Zhang <quic_taozha@...cinc.com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>,
Suzuki K Poulose <suzuki.poulose@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Konrad Dybcio <konradybcio@...il.com>,
Mike Leach <mike.leach@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC: Tao Zhang <quic_taozha@...cinc.com>,
Jinlong Mao <quic_jinlmao@...cinc.com>,
Leo Yan <leo.yan@...aro.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
<coresight@...ts.linaro.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
Tingwei Zhang <quic_tingweiz@...cinc.com>,
Yuanfang Zhang <quic_yuanfang@...cinc.com>,
Trilok Soni <quic_tsoni@...cinc.com>,
Hao Zhang <quic_hazha@...cinc.com>,
<linux-arm-msm@...r.kernel.org>, <bjorn.andersson@...aro.org>
Subject: [PATCH v1 6/9] coresight-tpdm: Add node to set dsb programming mode
Add node to set and show programming mode for TPDM DSB subunit.
Once the DSB programming mode is set, it will be written to the
register DSB_CR. Bit[10:9] of the DSB_CR register is used to set
the DSB test mode.
Signed-off-by: Tao Zhang <quic_taozha@...cinc.com>
---
drivers/hwtracing/coresight/coresight-tpdm.c | 45 +++++++++++++++++++++++++++-
drivers/hwtracing/coresight/coresight-tpdm.h | 12 ++++++++
2 files changed, 56 insertions(+), 1 deletion(-)
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index 35b328e..8872e3a 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -4,6 +4,7 @@
*/
#include <linux/amba/bus.h>
+#include <linux/bitfield.h>
#include <linux/bitmap.h>
#include <linux/coresight.h>
#include <linux/coresight-pmu.h>
@@ -38,7 +39,7 @@ static umode_t tpdm_dsb_is_visible(struct kobject *kobj,
static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
{
- u32 val;
+ u32 val, mode;
val = readl_relaxed(drvdata->base + TPDM_DSB_TIER);
/* Set trigger timestamp */
@@ -58,6 +59,19 @@ static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
/* Set the enable bit of DSB control register to 1 */
val = readl_relaxed(drvdata->base + TPDM_DSB_CR);
+ /* Set the cycle accurate mode */
+ mode = TPDM_DSB_MODE_CYCACC(drvdata->dsb->mode);
+ val &= ~TPDM_DSB_TEST_MODE;
+ val |= FIELD_PREP(TPDM_DSB_TEST_MODE, mode);
+ /* Set the byte lane for high-performance mode */
+ mode = TPDM_DSB_MODE_HPBYTESEL(drvdata->dsb->mode);
+ val &= ~TPDM_DSB_HPSEL;
+ val |= FIELD_PREP(TPDM_DSB_HPSEL, mode);
+ /* Set the performance mode */
+ if (drvdata->dsb->mode & TPDM_DSB_MODE_PERF)
+ val |= TPDM_DSB_MODE;
+ else
+ val &= ~TPDM_DSB_MODE;
val |= TPDM_DSB_CR_ENA;
writel_relaxed(val, drvdata->base + TPDM_DSB_CR);
}
@@ -257,6 +271,34 @@ static struct attribute_group tpdm_attr_grp = {
.attrs = tpdm_attrs,
};
+static ssize_t dsb_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+ return sysfs_emit(buf, "%lx\n",
+ (unsigned long)drvdata->dsb->mode);
+}
+
+static ssize_t dsb_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t size)
+{
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ unsigned long val;
+
+ if ((kstrtoul(buf, 0, &val)) || val < 0)
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ drvdata->dsb->mode = val & TPDM_MODE_ALL;
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+static DEVICE_ATTR_RW(dsb_mode);
+
static ssize_t dsb_trig_type_show(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -327,6 +369,7 @@ static ssize_t dsb_trig_ts_store(struct device *dev,
}
static DEVICE_ATTR_RW(dsb_trig_ts);
static struct attribute *tpdm_dsb_attrs[] = {
+ &dev_attr_dsb_mode.attr,
&dev_attr_dsb_trig_ts.attr,
&dev_attr_dsb_trig_type.attr,
NULL,
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
index dd4a013..de1492c 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.h
+++ b/drivers/hwtracing/coresight/coresight-tpdm.h
@@ -19,6 +19,16 @@
#define TPDM_DSB_XTRIG_TSENAB BIT(1)
/* Enable bit for DSB subunit trigger type */
#define TPDM_DSB_TRIG_TYPE BIT(12)
+/* Enable bit for DSB subunit perfmance mode */
+#define TPDM_DSB_MODE BIT(1)
+
+/* DSB programming modes */
+#define TPDM_DSB_MODE_CYCACC(val) (val & GENMASK(2, 0))
+#define TPDM_DSB_MODE_PERF BIT(3)
+#define TPDM_DSB_MODE_HPBYTESEL(val) (val & GENMASK(8, 4))
+#define TPDM_MODE_ALL (0xFFFFFFF)
+#define TPDM_DSB_TEST_MODE GENMASK(11, 9)
+#define TPDM_DSB_HPSEL GENMASK(6, 2)
/* TPDM integration test registers */
#define TPDM_ITATBCNTRL (0xEF0)
@@ -48,10 +58,12 @@
/**
* struct dsb_dataset - specifics associated to dsb dataset
+ * @mode: DSB programming mode
* @trig_ts: Enable/Disable trigger timestamp.
* @trig_type: Enable/Disable trigger type.
*/
struct dsb_dataset {
+ u32 mode;
bool trig_ts;
bool trig_type;
};
--
2.7.4
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