[PATCH v2 9/9] coresight-tpdm: Add nodes for timestamp request

Tao Zhang
2023-01-19T07:45:24Z

Add nodes to configure the timestamp request based on input
pattern match. Each TPDM that support DSB subunit has maximum of
n(n<7) TPR registers to configure value for timestamp request
based on input pattern match. Eight 32 bit registers providing
DSB interface timestamp request pattern match comparison. And
each TPDM that support DSB subunit has maximum of m(m<7) TPMR
registers to configure pattern mask for timestamp request. Eight
32 bit registers providing DSB interface timestamp request
pattern match mask generation. Add nodes to enable/disable
pattern timestamp and set pattern timestamp type.

Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Tao Zhang <taozha@qti.qualcomm.com>
---
drivers/hwtracing/coresight/coresight-tpdm.c | 174 +++++++++++++++++++++++++++
drivers/hwtracing/coresight/coresight-tpdm.h | 14 +++
2 files changed, 188 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index 52f6331..97b26c2 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -49,6 +49,13 @@ static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
drvdata->base + TPDM_DSB_EDCMR(i));

for (i = 0; i < TPDM_DSB_MAX_PATT; i++) {
+ writel_relaxed(drvdata->dsb->patt_val[i],
+ drvdata->base + TPDM_DSB_TPR(i));
+ writel_relaxed(drvdata->dsb->patt_mask[i],
+ drvdata->base + TPDM_DSB_TPMR(i));
+ }
+
+ for (i = 0; i < TPDM_DSB_MAX_PATT; i++) {
writel_relaxed(drvdata->dsb->trig_patt_val[i],
drvdata->base + TPDM_DSB_XPR(i));
writel_relaxed(drvdata->dsb->trig_patt_mask[i],
@@ -56,6 +63,16 @@ static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
}

val = readl_relaxed(drvdata->base + TPDM_DSB_TIER);
+ /* Set pattern timestamp type and enablement */
+ if (drvdata->dsb->patt_ts) {
+ val |= TPDM_DSB_PATT_TSENAB;
+ if (drvdata->dsb->patt_type)
+ val |= TPDM_DSB_PATT_TYPE;
+ else
+ val &= ~TPDM_DSB_PATT_TYPE;
+ } else {
+ val &= ~TPDM_DSB_PATT_TSENAB;
+ }
/* Set trigger timestamp */
if (drvdata->dsb->trig_ts)
val |= TPDM_DSB_XTRIG_TSENAB;
@@ -444,6 +461,159 @@ static ssize_t dsb_edge_ctrl_mask_store(struct device *dev,
}
static DEVICE_ATTR_RW(dsb_edge_ctrl_mask);

+static ssize_t dsb_patt_val_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ ssize_t size = 0;
+ int i = 0;
+
+ spin_lock(&drvdata->spinlock);
+ for (i = 0; i < TPDM_DSB_MAX_PATT; i++) {
+ size += sysfs_emit_at(buf, size,
+ "Index: 0x%x Value: 0x%x\n", i,
+ drvdata->dsb->patt_val[i]);
+ }
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+
+/*
+ * value 1: Index of TPR register
+ * value 2: Value need to be written
+ */
+static ssize_t dsb_patt_val_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 index, val;
+
+ if (sscanf(buf, "%lx %lx", &index, &val) != 2)
+ return -EINVAL;
+ if (index >= TPDM_DSB_MAX_PATT)
+ return -EPERM;
+
+ spin_lock(&drvdata->spinlock);
+ drvdata->dsb->patt_val[index] = val;
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+static DEVICE_ATTR_RW(dsb_patt_val);
+
+static ssize_t dsb_patt_mask_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ ssize_t size = 0;
+ int i = 0;
+
+ spin_lock(&drvdata->spinlock);
+ for (i = 0; i < TPDM_DSB_MAX_PATT; i++) {
+ size += sysfs_emit_at(buf, size,
+ "Index: 0x%x Value: 0x%x\n", i,
+ drvdata->dsb->patt_mask[i]);
+ }
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+
+/*
+ * value 1: Index of TPMR register
+ * value 2: Value need to be written
+ */
+static ssize_t dsb_patt_mask_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 index, val;
+
+ if (sscanf(buf, "%lx %lx", &index, &val) != 2)
+ return -EINVAL;
+ if (index >= TPDM_DSB_MAX_PATT)
+ return -EPERM;
+
+ spin_lock(&drvdata->spinlock);
+ drvdata->dsb->patt_mask[index] = val;
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+static DEVICE_ATTR_RW(dsb_patt_mask);
+
+static ssize_t dsb_patt_ts_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+ return sysfs_emit(buf, "%u\n",
+ (unsigned int)drvdata->dsb->patt_ts);
+}
+
+/*
+ * value 1: Enable/Disable DSB pattern timestamp
+ */
+static ssize_t dsb_patt_ts_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, 16, &val))
+ return -EINVAL;
+ if (!(drvdata->datasets & TPDM_PIDR0_DS_DSB))
+ return -EPERM;
+
+ spin_lock(&drvdata->spinlock);
+ if (val)
+ drvdata->dsb->patt_ts = true;
+ else
+ drvdata->dsb->patt_ts = false;
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+static DEVICE_ATTR_RW(dsb_patt_ts);
+
+static ssize_t dsb_patt_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+
+ return sysfs_emit(buf, "%u\n",
+ (unsigned int)drvdata->dsb->patt_type);
+}
+
+/*
+ * value 1: Set DSB pattern type
+ */
+static ssize_t dsb_patt_type_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, 16, &val))
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ if (val)
+ drvdata->dsb->patt_type = true;
+ else
+ drvdata->dsb->patt_type = false;
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+static DEVICE_ATTR_RW(dsb_patt_type);
+
static ssize_t dsb_trig_patt_val_show(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -593,6 +763,10 @@ static struct attribute *tpdm_dsb_attrs[] = {
&dev_attr_dsb_mode.attr,
&dev_attr_dsb_edge_ctrl.attr,
&dev_attr_dsb_edge_ctrl_mask.attr,
+ &dev_attr_dsb_patt_val.attr,
+ &dev_attr_dsb_patt_mask.attr,
+ &dev_attr_dsb_patt_ts.attr,
+ &dev_attr_dsb_patt_type.attr,
&dev_attr_dsb_trig_patt_val.attr,
&dev_attr_dsb_trig_patt_mask.attr,
&dev_attr_dsb_trig_ts.attr,
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
index c93f72f..54cb4e0 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.h
+++ b/drivers/hwtracing/coresight/coresight-tpdm.h
@@ -12,6 +12,8 @@
/* DSB Subunit Registers */
#define TPDM_DSB_CR (0x780)
#define TPDM_DSB_TIER (0x784)
+#define TPDM_DSB_TPR(n) (0x788 + (n * 4))
+#define TPDM_DSB_TPMR(n) (0x7A8 + (n * 4))
#define TPDM_DSB_XPR(n) (0x7C8 + (n * 4))
#define TPDM_DSB_XPMR(n) (0x7E8 + (n * 4))
#define TPDM_DSB_EDCR(n) (0x808 + (n * 4))
@@ -19,8 +21,12 @@

/* Enable bit for DSB subunit */
#define TPDM_DSB_CR_ENA BIT(0)
+/* Enable bit for DSB subunit pattern timestamp */
+#define TPDM_DSB_PATT_TSENAB BIT(0)
/* Enable bit for DSB subunit trigger timestamp */
#define TPDM_DSB_XTRIG_TSENAB BIT(1)
+/* Bit for DSB subunit pattern type */
+#define TPDM_DSB_PATT_TYPE BIT(2)
/* Enable bit for DSB subunit trigger type */
#define TPDM_DSB_TRIG_TYPE BIT(12)
/* Enable bit for DSB subunit perfmance mode */
@@ -75,6 +81,10 @@
* @mode: DSB programming mode
* @edge_ctrl: Save value for edge control
* @edge_ctrl_mask: Save value for edge control mask
+ * @patt_val: Save value for pattern
+ * @patt_mask: Save value for pattern mask
+ * @patt_ts: Enable/Disable pattern timestamp
+ * @patt_type: Set pattern type
* @trig_patt_val: Save value for trigger pattern
* @trig_patt_mask: Save value for trigger pattern mask
* @trig_ts: Enable/Disable trigger timestamp.
@@ -84,6 +94,10 @@ struct dsb_dataset {
u32 mode;
u32 edge_ctrl[TPDM_DSB_MAX_EDCR];
u32 edge_ctrl_mask[TPDM_DSB_MAX_EDCMR];
+ u32 patt_val[TPDM_DSB_MAX_PATT];
+ u32 patt_mask[TPDM_DSB_MAX_PATT];
+ bool patt_ts;
+ bool patt_type;
u32 trig_patt_val[TPDM_DSB_MAX_PATT];
u32 trig_patt_mask[TPDM_DSB_MAX_PATT];
bool trig_ts;
--
2.7.4