On 9/6/2023 5:09 PM, Suzuki K Poulose wrote:
On 22/08/2023 06:26, Tao Zhang wrote:
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@xxxxxxxxxxx>
---
.../ABI/testing/sysfs-bus-coresight-devices-tpdm | 40 ++++++-
drivers/hwtracing/coresight/coresight-tpdm.c | 133
++++++++++++++++++++-
drivers/hwtracing/coresight/coresight-tpdm.h | 24 ++++
3 files changed, 191 insertions(+), 6 deletions(-)
diff --git
a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
index f5cd302..46a5535 100644
--- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
+++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
@@ -123,4 +123,42 @@ KernelVersion 6.5
Contact: Jinlong Mao (QUIC) <quic_jinlmao@xxxxxxxxxxx>, Tao
Zhang (QUIC) <quic_taozha@xxxxxxxxxxx>
Description:
(RW) Set/Get the mask of the trigger pattern for the DSB
- subunit TPDM.
\ No newline at end of file
+ subunit TPDM.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpr[0:7]
+Date: March 2023
+KernelVersion 6.5
+Contact: Jinlong Mao (QUIC) <quic_jinlmao@xxxxxxxxxxx>, Tao Zhang
(QUIC) <quic_taozha@xxxxxxxxxxx>
+Description:
+ (RW) Set/Get the value of the pattern for the DSB subunit TPDM.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpmr[0:7]
+Date: March 2023
+KernelVersion 6.5
+Contact: Jinlong Mao (QUIC) <quic_jinlmao@xxxxxxxxxxx>, Tao Zhang
(QUIC) <quic_taozha@xxxxxxxxxxx>
+Description:
+ (RW) Set/Get the mask of the pattern for the DSB subunit TPDM.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt_ts
Given we have a dedicated "group" for dsb_patt, could we move this to
dsb_patt and name this "enable_timestamp"
i.e.,
tpdm-name/dsb_patt/enable_timestamp
Sure, I will update this in the next patch series.
+Date: March 2023
+KernelVersion 6.5
+Contact: Jinlong Mao (QUIC) <quic_jinlmao@xxxxxxxxxxx>, Tao Zhang
(QUIC) <quic_taozha@xxxxxxxxxxx>
+Description:
+ (Write) Set the pattern timestamp of DSB tpdm. Read
+ the pattern timestamp of DSB tpdm.
+
+ Accepts only one of the 2 values - 0 or 1.
+ 0 : Disable DSB pattern timestamp.
+ 1 : Enable DSB pattern timestamp.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt_type
Similarly here.
Got it.
+Date: March 2023
+KernelVersion 6.5
+Contact: Jinlong Mao (QUIC) <quic_jinlmao@xxxxxxxxxxx>, Tao Zhang
(QUIC) <quic_taozha@xxxxxxxxxxx>
+Description:
+ (Write) Set the pattern type of DSB tpdm. Read
+ the pattern type of DSB tpdm.
+
+ Accepts only one of the 2 values - 0 or 1.
+ 0 : Set the DSB pattern type to value.
+ 1 : Set the DSB pattern type to toggle.
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c
b/drivers/hwtracing/coresight/coresight-tpdm.c
index 6521019..9b0e060 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -45,6 +45,12 @@ static ssize_t tpdm_simple_dataset_show(struct
device *dev,
case DSB_TRIG_PATT_MASK:
return sysfs_emit(buf, "0x%x\n",
drvdata->dsb->trig_patt_mask[tpdm_attr->idx]);
+ case DSB_PATT:
+ return sysfs_emit(buf, "0x%x\n",
+ drvdata->dsb->patt_val[tpdm_attr->idx]);
+ case DSB_PATT_MASK:
+ return sysfs_emit(buf, "0x%x\n",
+ drvdata->dsb->patt_mask[tpdm_attr->idx]);
default:
return -EINVAL;
}
@@ -72,6 +78,12 @@ static ssize_t tpdm_simple_dataset_store(struct
device *dev,
case DSB_TRIG_PATT_MASK:
drvdata->dsb->trig_patt_mask[tpdm_attr->idx] = val;
break;
+ case DSB_PATT:
+ drvdata->dsb->patt_val[tpdm_attr->idx] = val;
+ break;
+ case DSB_PATT_MASK:
+ drvdata->dsb->patt_mask[tpdm_attr->idx] = val;
+ break;
default:
spin_unlock(&drvdata->spinlock);
return -EINVAL;
@@ -129,6 +141,27 @@ static void set_dsb_mode(struct tpdm_drvdata
*drvdata, u32 *val)
*val &= ~TPDM_DSB_CR_MODE;
}
+static void set_dsb_tier(struct tpdm_drvdata *drvdata, u32 *val)
+{
Could we not Write to the DSB_TIER register from this function ?
There are no other users of this function and keeping the
read and write operations in the caller doesn't make much
sense.
Sure, I will update this in the next patch series.
+ /* Set pattern timestamp type and enablement */
+ if (drvdata->dsb->patt_ts) {
+ *val |= TPDM_DSB_TIER_PATT_TSENAB;
+ if (drvdata->dsb->patt_type)
+ *val |= TPDM_DSB_TIER_PATT_TYPE;
+ else
+ *val &= ~TPDM_DSB_TIER_PATT_TYPE;
+ } else {
+ *val &= ~TPDM_DSB_TIER_PATT_TSENAB;
+ }
+
+ /* Set trigger timestamp */
+ if (drvdata->dsb->trig_ts)
+ *val |= TPDM_DSB_TIER_XTRIG_TSENAB;
+ else
+ *val &= ~TPDM_DSB_TIER_XTRIG_TSENAB;
minor nit:
Does it make sense to clear everything in one shot and set the
required fields based on the fields ? That makes it a bit more
reader friendly.
{
u32 val = readl_relaxed(drvdata.., TPDM_DSB_TIER);
/* Clear all relevant fields */
val &= ~(TPDM_DSB_TIER_PATT_TSENAB | TPDM_DSB_TIER_PATT_TYPE |\
TPDM_DSB_TIER_XTRIG_TSENAB)
/* Set the required fields */
if (drvdata->dsb->patt_ts) {
val |= TPDM_DSB_TIER_PATT_TSENAB;
if (drvdata->dsb->patt_type)
val |= TPDM_DSB_TIER_PATT_TYPE;
}
if (drvdata->dsb->trig_ts)
val |= TPDM_DSB_TIER_XTRIG_TSENAB;
writel_relaxed(val, ... TPDM_DSB_TIER);
}
Sure, I will update this in the next patch series.
+
+}
+
static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
{
u32 val, i;
@@ -140,17 +173,17 @@ static void tpdm_enable_dsb(struct tpdm_drvdata
*drvdata)
writel_relaxed(drvdata->dsb->edge_ctrl_mask[i],
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));
writel_relaxed(drvdata->dsb->trig_patt[i],
drvdata->base + TPDM_DSB_XPR(i));
writel_relaxed(drvdata->dsb->trig_patt_mask[i],
drvdata->base + TPDM_DSB_XPMR(i));
}
val = readl_relaxed(drvdata->base + TPDM_DSB_TIER);
- /* Set trigger timestamp */
- if (drvdata->dsb->trig_ts)
- val |= TPDM_DSB_TIER_XTRIG_TSENAB;
- else
- val &= ~TPDM_DSB_TIER_XTRIG_TSENAB;
+ set_dsb_tier(drvdata, &val);
writel_relaxed(val, drvdata->base + TPDM_DSB_TIER);
See above
Got it.
val = readl_relaxed(drvdata->base + TPDM_DSB_CR);
@@ -471,6 +504,67 @@ static ssize_t ctrl_mask_store(struct device *dev,
}
static DEVICE_ATTR_WO(ctrl_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, 0, &val)) || (val & ~1UL))
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ drvdata->dsb->patt_ts = !!val;
+ 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, 0, &val)) || (val & ~1UL))
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ drvdata->dsb->patt_type = val;
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+static DEVICE_ATTR_RW(dsb_patt_type);
+
static ssize_t dsb_trig_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -593,8 +687,30 @@ static struct attribute
*tpdm_dsb_trig_patt_attrs[] = {
NULL,
};
+static struct attribute *tpdm_dsb_patt_attrs[] = {
+ DSB_PATT_ATTR(0),
+ DSB_PATT_ATTR(1),
+ DSB_PATT_ATTR(2),
+ DSB_PATT_ATTR(3),
+ DSB_PATT_ATTR(4),
+ DSB_PATT_ATTR(5),
+ DSB_PATT_ATTR(6),
+ DSB_PATT_ATTR(7),
+ DSB_PATT_MASK_ATTR(0),
+ DSB_PATT_MASK_ATTR(1),
+ DSB_PATT_MASK_ATTR(2),
+ DSB_PATT_MASK_ATTR(3),
+ DSB_PATT_MASK_ATTR(4),
+ DSB_PATT_MASK_ATTR(5),
+ DSB_PATT_MASK_ATTR(6),
+ DSB_PATT_MASK_ATTR(7),
+ NULL,
+};
+
static struct attribute *tpdm_dsb_attrs[] = {
&dev_attr_dsb_mode.attr,
+ &dev_attr_dsb_patt_ts.attr,
+ &dev_attr_dsb_patt_type.attr,
As mentioned above, could we move the above two to the dsb_patt_attrs ?
Sure, I will update this in the next patch series.
Best,
Tao
Suzuki
&dev_attr_dsb_trig_ts.attr,
&dev_attr_dsb_trig_type.attr,
NULL,
@@ -617,11 +733,18 @@ static struct attribute_group
tpdm_dsb_trig_patt_grp = {
.name = "dsb_trig_patt",
};
+static struct attribute_group tpdm_dsb_patt_grp = {
+ .attrs = tpdm_dsb_patt_attrs,
+ .is_visible = tpdm_dsb_is_visible,
+ .name = "dsb_patt",
+};
+
static const struct attribute_group *tpdm_attr_grps[] = {
&tpdm_attr_grp,
&tpdm_dsb_attrs_grp,
&tpdm_dsb_edge_grp,
&tpdm_dsb_trig_patt_grp,
+ &tpdm_dsb_patt_grp,
NULL,
};
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h
b/drivers/hwtracing/coresight/coresight-tpdm.h
index 9e1b0a4..9173e80 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))
@@ -28,8 +30,12 @@
/* Data bits for DSB test mode */
#define TPDM_DSB_CR_TEST_MODE GENMASK(10, 9)
+/* Enable bit for DSB subunit pattern timestamp */
+#define TPDM_DSB_TIER_PATT_TSENAB BIT(0)
/* Enable bit for DSB subunit trigger timestamp */
#define TPDM_DSB_TIER_XTRIG_TSENAB BIT(1)
+/* Bit for DSB subunit pattern type */
+#define TPDM_DSB_TIER_PATT_TYPE BIT(2)
/* DSB programming modes */
/* DSB mode bits mask */
@@ -122,14 +128,26 @@
tpdm_simple_dataset_rw(xpmr##nr, \
DSB_TRIG_PATT_MASK, nr, TPDM_DSB_MAX_PATT)
+#define DSB_PATT_ATTR(nr) \
+ tpdm_simple_dataset_rw(tpr##nr, \
+ DSB_PATT, nr, TPDM_DSB_MAX_PATT)
+
+#define DSB_PATT_MASK_ATTR(nr) \
+ tpdm_simple_dataset_rw(tpmr##nr, \
+ DSB_PATT_MASK, nr, TPDM_DSB_MAX_PATT)
+
/**
* struct dsb_dataset - specifics associated to dsb dataset
* @mode: DSB programming mode
* @edge_ctrl_idx Index number of the edge control
* @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
* @trig_patt: Save value for trigger pattern
* @trig_patt_mask: Save value for trigger pattern mask
+ * @patt_ts: Enable/Disable pattern timestamp
+ * @patt_type: Set pattern type
* @trig_ts: Enable/Disable trigger timestamp.
* @trig_type: Enable/Disable trigger type.
*/
@@ -138,8 +156,12 @@ struct dsb_dataset {
u32 edge_ctrl_idx;
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];
u32 trig_patt[TPDM_DSB_MAX_PATT];
u32 trig_patt_mask[TPDM_DSB_MAX_PATT];
+ bool patt_ts;
+ bool patt_type;
bool trig_ts;
bool trig_type;
};
@@ -171,6 +193,8 @@ enum dataset_mem {
DSB_EDGE_CTRL_MASK,
DSB_TRIG_PATT,
DSB_TRIG_PATT_MASK,
+ DSB_PATT,
+ DSB_PATT_MASK,
};
/**
