Timestamps are requested if the monitor’s CMB data set unit input
data matches the value in the Monitor CMB timestamp pattern and mask
registers (M_CMB_TPR and M_CMB_TPMR) when CMB timestamp enabled
via the timestamp insertion enable register bit(CMB_TIER.PATT_TSENAB).
The pattern match trigger output is achieved via setting values into
the CMB trigger pattern and mask registers (CMB_XPR and CMB_XPMR).
After configuring a pattern through these registers, the TPDM subunit
will assert an output trigger every time it receives new input data
that matches the configured pattern value. Values in a given bit
number of the mask register correspond to the same bit number in
the corresponding pattern register.
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Jinlong Mao <quic_jinlmao@quicinc.com>
---
.../testing/sysfs-bus-coresight-devices-tpdm | 30 ++++++
drivers/hwtracing/coresight/coresight-tpdm.c | 96 ++++++++++++++++++-
drivers/hwtracing/coresight/coresight-tpdm.h | 39 ++++++++
3 files changed, 164 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
index 6dfb18d6d64a..b6cf050861ed 100644
--- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
+++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
@@ -184,3 +184,33 @@ Description: (Write) Set the data collection mode of CMB tpdm. Continuous
Accepts only one of the 2 values - 0 or 1.
0 : Continuous CMB collection mode.
1 : Trace-on-change CMB collection mode.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/cmb_trig_patt/xpr[0:1]
+Date: January 2024
+KernelVersion 6.9
+Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
+Description:
+ (RW) Set/Get the value of the trigger pattern for the CMB
+ subunit TPDM.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/cmb_trig_patt/xpmr[0:1]
+Date: January 2024
+KernelVersion 6.9
+Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
+Description:
+ (RW) Set/Get the mask of the trigger pattern for the CMB
+ subunit TPDM.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpr[0:1]
+Date: January 2024
+KernelVersion 6.9
+Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
+Description:
+ (RW) Set/Get the value of the pattern for the CMB subunit TPDM.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpmr[0:1]
+Date: January 2024
+KernelVersion 6.9
+Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
+Description:
+ (RW) Set/Get the mask of the pattern for the CMB subunit TPDM.
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index b20071460375..07587287d9fa 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -66,6 +66,26 @@ static ssize_t tpdm_simple_dataset_show(struct device *dev,
return -EINVAL;
return sysfs_emit(buf, "0x%x\n",
drvdata->dsb->msr[tpdm_attr->idx]);
+ case CMB_TRIG_PATT:
+ if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
+ return -EINVAL;
+ return sysfs_emit(buf, "0x%x\n",
+ drvdata->cmb->trig_patt[tpdm_attr->idx]);
+ case CMB_TRIG_PATT_MASK:
+ if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
+ return -EINVAL;
+ return sysfs_emit(buf, "0x%x\n",
+ drvdata->cmb->trig_patt_mask[tpdm_attr->idx]);
+ case CMB_PATT:
+ if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
+ return -EINVAL;
+ return sysfs_emit(buf, "0x%x\n",
+ drvdata->cmb->patt_val[tpdm_attr->idx]);
+ case CMB_PATT_MASK:
+ if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
+ return -EINVAL;
+ return sysfs_emit(buf, "0x%x\n",
+ drvdata->cmb->patt_mask[tpdm_attr->idx]);
}
return -EINVAL;
}
@@ -118,6 +138,30 @@ static ssize_t tpdm_simple_dataset_store(struct device *dev,
ret = size;
}
break;
+ case CMB_TRIG_PATT:
+ if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
+ drvdata->cmb->trig_patt[tpdm_attr->idx] = val;
+ ret = size;
+ }
+ break;
+ case CMB_TRIG_PATT_MASK:
+ if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
+ drvdata->cmb->trig_patt_mask[tpdm_attr->idx] = val;
+ ret = size;
+ }
+ break;
+ case CMB_PATT:
+ if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
+ drvdata->cmb->patt_val[tpdm_attr->idx] = val;
+ ret = size;
+ }
+ break;
+ case CMB_PATT_MASK:
+ if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
+ drvdata->cmb->patt_mask[tpdm_attr->idx] = val;
+ ret = size;
+ }
+ break;
default:
break;
}
@@ -280,12 +324,32 @@ static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
static void tpdm_enable_cmb(struct tpdm_drvdata *drvdata)
{
- u32 val;
+ u32 val, i;
if (!tpdm_has_cmb_dataset(drvdata))
return;
+ /* Configure pattern registers */
+ for (i = 0; i < TPDM_CMB_MAX_PATT; i++) {
+ writel_relaxed(drvdata->cmb->patt_val[i],
+ drvdata->base + TPDM_CMB_TPR(i));
+ writel_relaxed(drvdata->cmb->patt_mask[i],
+ drvdata->base + TPDM_CMB_TPMR(i));
+ writel_relaxed(drvdata->cmb->trig_patt[i],
+ drvdata->base + TPDM_CMB_XPR(i));
+ writel_relaxed(drvdata->cmb->trig_patt_mask[i],
+ drvdata->base + TPDM_CMB_XPMR(i));
+ }
+
val = readl_relaxed(drvdata->base + TPDM_CMB_CR);
+ /*
+ * Set to 0 for continuous CMB collection mode,
+ * 1 for trace-on-change CMB collection mode.
+ */
+ if (drvdata->cmb->trace_mode)
+ val |= TPDM_CMB_CR_MODE;
+ else
+ val &= ~TPDM_CMB_CR_MODE;
/* Set the enable bit of CMB control register to 1 */
val |= TPDM_CMB_CR_ENA;
writel_relaxed(val, drvdata->base + TPDM_CMB_CR);
@@ -887,6 +951,22 @@ static struct attribute *tpdm_dsb_msr_attrs[] = {
NULL,
};
+static struct attribute *tpdm_cmb_trig_patt_attrs[] = {
+ CMB_TRIG_PATT_ATTR(0),
+ CMB_TRIG_PATT_ATTR(1),
+ CMB_TRIG_PATT_MASK_ATTR(0),
+ CMB_TRIG_PATT_MASK_ATTR(1),
+ NULL,
+};
+
+static struct attribute *tpdm_cmb_patt_attrs[] = {
+ CMB_PATT_ATTR(0),
+ CMB_PATT_ATTR(1),
+ CMB_PATT_MASK_ATTR(0),
+ CMB_PATT_MASK_ATTR(1),
+ NULL,
+};
+
static struct attribute *tpdm_dsb_attrs[] = {
&dev_attr_dsb_mode.attr,
&dev_attr_dsb_trig_ts.attr,
@@ -933,6 +1013,18 @@ static struct attribute_group tpdm_cmb_attr_grp = {
.is_visible = tpdm_cmb_is_visible,
};
+static struct attribute_group tpdm_cmb_trig_patt_grp = {
+ .attrs = tpdm_cmb_trig_patt_attrs,
+ .is_visible = tpdm_cmb_is_visible,
+ .name = "cmb_trig_patt",
+};
+
+static struct attribute_group tpdm_cmb_patt_grp = {
+ .attrs = tpdm_cmb_patt_attrs,
+ .is_visible = tpdm_cmb_is_visible,
+ .name = "cmb_patt",
+};
+
static const struct attribute_group *tpdm_attr_grps[] = {
&tpdm_attr_grp,
&tpdm_dsb_attr_grp,
@@ -941,6 +1033,8 @@ static const struct attribute_group *tpdm_attr_grps[] = {
&tpdm_dsb_patt_grp,
&tpdm_dsb_msr_grp,
&tpdm_cmb_attr_grp,
+ &tpdm_cmb_trig_patt_grp,
+ &tpdm_cmb_patt_grp,
NULL,
};
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
index 2af92c270ed1..8cb8a9b35384 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.h
+++ b/drivers/hwtracing/coresight/coresight-tpdm.h
@@ -11,12 +11,23 @@
/* CMB Subunit Registers */
#define TPDM_CMB_CR (0xA00)
+/*CMB subunit timestamp pattern registers*/
+#define TPDM_CMB_TPR(n) (0xA08 + (n * 4))
+/*CMB subunit timestamp pattern mask registers*/
+#define TPDM_CMB_TPMR(n) (0xA10 + (n * 4))
+/*CMB subunit trigger pattern registers*/
+#define TPDM_CMB_XPR(n) (0xA18 + (n * 4))
+/*CMB subunit trigger pattern mask registers*/
+#define TPDM_CMB_XPMR(n) (0xA20 + (n * 4))
/* Enable bit for CMB subunit */
#define TPDM_CMB_CR_ENA BIT(0)
/* Trace collection mode for CMB subunit */
#define TPDM_CMB_CR_MODE BIT(1)
+/*Patten register number*/
+#define TPDM_CMB_MAX_PATT 2
+
/* DSB Subunit Registers */
#define TPDM_DSB_CR (0x780)
#define TPDM_DSB_TIER (0x784)
@@ -151,6 +162,22 @@
tpdm_simple_dataset_rw(msr##nr, \
DSB_MSR, nr)
+#define CMB_TRIG_PATT_ATTR(nr) \
+ tpdm_simple_dataset_rw(xpr##nr, \
+ CMB_TRIG_PATT, nr)
+
+#define CMB_TRIG_PATT_MASK_ATTR(nr) \
+ tpdm_simple_dataset_rw(xpmr##nr, \
+ CMB_TRIG_PATT_MASK, nr)
+
+#define CMB_PATT_ATTR(nr) \
+ tpdm_simple_dataset_rw(tpr##nr, \
+ CMB_PATT, nr)
+
+#define CMB_PATT_MASK_ATTR(nr) \
+ tpdm_simple_dataset_rw(tpmr##nr, \
+ CMB_PATT_MASK, nr)
+
/**
* struct dsb_dataset - specifics associated to dsb dataset
* @mode: DSB programming mode
@@ -186,9 +213,17 @@ struct dsb_dataset {
/**
* struct cmb_dataset
* @trace_mode: Dataset collection mode
+ * @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
*/
struct cmb_dataset {
u32 trace_mode;
+ u32 patt_val[TPDM_CMB_MAX_PATT];
+ u32 patt_mask[TPDM_CMB_MAX_PATT];
+ u32 trig_patt[TPDM_CMB_MAX_PATT];
+ u32 trig_patt_mask[TPDM_CMB_MAX_PATT];
};
/**
@@ -225,6 +260,10 @@ enum dataset_mem {
DSB_PATT,
DSB_PATT_MASK,
DSB_MSR,
+ CMB_TRIG_PATT,
+ CMB_TRIG_PATT_MASK,
+ CMB_PATT,
+ CMB_PATT_MASK
};
/**
--
2.17.1
On 30/01/2024 09:02, Tao Zhang wrote:
> Timestamps are requested if the monitor’s CMB data set unit input
> data matches the value in the Monitor CMB timestamp pattern and mask
> registers (M_CMB_TPR and M_CMB_TPMR) when CMB timestamp enabled
> via the timestamp insertion enable register bit(CMB_TIER.PATT_TSENAB).
> The pattern match trigger output is achieved via setting values into
> the CMB trigger pattern and mask registers (CMB_XPR and CMB_XPMR).
> After configuring a pattern through these registers, the TPDM subunit
> will assert an output trigger every time it receives new input data
> that matches the configured pattern value. Values in a given bit
> number of the mask register correspond to the same bit number in
> the corresponding pattern register.
>
> Reviewed-by: James Clark <james.clark@arm.com>
> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
> Signed-off-by: Jinlong Mao <quic_jinlmao@quicinc.com>
> ---
> .../testing/sysfs-bus-coresight-devices-tpdm | 30 ++++++
> drivers/hwtracing/coresight/coresight-tpdm.c | 96 ++++++++++++++++++-
> drivers/hwtracing/coresight/coresight-tpdm.h | 39 ++++++++
> 3 files changed, 164 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
> index 6dfb18d6d64a..b6cf050861ed 100644
> --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
> +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
> @@ -184,3 +184,33 @@ Description: (Write) Set the data collection mode of CMB tpdm. Continuous
> Accepts only one of the 2 values - 0 or 1.
> 0 : Continuous CMB collection mode.
> 1 : Trace-on-change CMB collection mode.
> +
> +What: /sys/bus/coresight/devices/<tpdm-name>/cmb_trig_patt/xpr[0:1]
> +Date: January 2024
> +KernelVersion 6.9
> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
> +Description:
> + (RW) Set/Get the value of the trigger pattern for the CMB
> + subunit TPDM.
> +
> +What: /sys/bus/coresight/devices/<tpdm-name>/cmb_trig_patt/xpmr[0:1]
> +Date: January 2024
> +KernelVersion 6.9
> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
> +Description:
> + (RW) Set/Get the mask of the trigger pattern for the CMB
> + subunit TPDM.
> +
> +What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpr[0:1]
> +Date: January 2024
> +KernelVersion 6.9
> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
> +Description:
> + (RW) Set/Get the value of the pattern for the CMB subunit TPDM.
> +
> +What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpmr[0:1]
> +Date: January 2024
> +KernelVersion 6.9
> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
> +Description:
> + (RW) Set/Get the mask of the pattern for the CMB subunit TPDM.
> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
> index b20071460375..07587287d9fa 100644
> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
> @@ -66,6 +66,26 @@ static ssize_t tpdm_simple_dataset_show(struct device *dev,
> return -EINVAL;
> return sysfs_emit(buf, "0x%x\n",
> drvdata->dsb->msr[tpdm_attr->idx]);
> + case CMB_TRIG_PATT:
> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
> + return -EINVAL;
> + return sysfs_emit(buf, "0x%x\n",
> + drvdata->cmb->trig_patt[tpdm_attr->idx]);
> + case CMB_TRIG_PATT_MASK:
> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
> + return -EINVAL;
> + return sysfs_emit(buf, "0x%x\n",
> + drvdata->cmb->trig_patt_mask[tpdm_attr->idx]);
> + case CMB_PATT:
> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
> + return -EINVAL;
> + return sysfs_emit(buf, "0x%x\n",
> + drvdata->cmb->patt_val[tpdm_attr->idx]);
> + case CMB_PATT_MASK:
> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
> + return -EINVAL;
> + return sysfs_emit(buf, "0x%x\n",
> + drvdata->cmb->patt_mask[tpdm_attr->idx]);
> }
> return -EINVAL;
> }
> @@ -118,6 +138,30 @@ static ssize_t tpdm_simple_dataset_store(struct device *dev,
> ret = size;
> }
> break;
> + case CMB_TRIG_PATT:
> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
> + drvdata->cmb->trig_patt[tpdm_attr->idx] = val;
> + ret = size;
> + }
> + break;
> + case CMB_TRIG_PATT_MASK:
> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
> + drvdata->cmb->trig_patt_mask[tpdm_attr->idx] = val;
> + ret = size;
> + }
> + break;
> + case CMB_PATT:
> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
> + drvdata->cmb->patt_val[tpdm_attr->idx] = val;
> + ret = size;
> + }
> + break;
> + case CMB_PATT_MASK:
> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
> + drvdata->cmb->patt_mask[tpdm_attr->idx] = val;
> + ret = size;
> + }
> + break;
> default:
> break;
> }
> @@ -280,12 +324,32 @@ static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
>
> static void tpdm_enable_cmb(struct tpdm_drvdata *drvdata)
> {
> - u32 val;
> + u32 val, i;
>
> if (!tpdm_has_cmb_dataset(drvdata))
> return;
>
> + /* Configure pattern registers */
> + for (i = 0; i < TPDM_CMB_MAX_PATT; i++) {
> + writel_relaxed(drvdata->cmb->patt_val[i],
> + drvdata->base + TPDM_CMB_TPR(i));
> + writel_relaxed(drvdata->cmb->patt_mask[i],
> + drvdata->base + TPDM_CMB_TPMR(i));
> + writel_relaxed(drvdata->cmb->trig_patt[i],
> + drvdata->base + TPDM_CMB_XPR(i));
> + writel_relaxed(drvdata->cmb->trig_patt_mask[i],
> + drvdata->base + TPDM_CMB_XPMR(i));
> + }
> +
> val = readl_relaxed(drvdata->base + TPDM_CMB_CR);
> + /*
> + * Set to 0 for continuous CMB collection mode,
> + * 1 for trace-on-change CMB collection mode.
> + */
> + if (drvdata->cmb->trace_mode)
> + val |= TPDM_CMB_CR_MODE;
> + else
> + val &= ~TPDM_CMB_CR_MODE;
> /* Set the enable bit of CMB control register to 1 */
> val |= TPDM_CMB_CR_ENA;
> writel_relaxed(val, drvdata->base + TPDM_CMB_CR);
> @@ -887,6 +951,22 @@ static struct attribute *tpdm_dsb_msr_attrs[] = {
> NULL,
> };
>
> +static struct attribute *tpdm_cmb_trig_patt_attrs[] = {
> + CMB_TRIG_PATT_ATTR(0),
> + CMB_TRIG_PATT_ATTR(1),
> + CMB_TRIG_PATT_MASK_ATTR(0),
> + CMB_TRIG_PATT_MASK_ATTR(1),
> + NULL,
> +};
> +
> +static struct attribute *tpdm_cmb_patt_attrs[] = {
> + CMB_PATT_ATTR(0),
> + CMB_PATT_ATTR(1),
> + CMB_PATT_MASK_ATTR(0),
> + CMB_PATT_MASK_ATTR(1),
> + NULL,
> +};
> +
> static struct attribute *tpdm_dsb_attrs[] = {
> &dev_attr_dsb_mode.attr,
> &dev_attr_dsb_trig_ts.attr,
> @@ -933,6 +1013,18 @@ static struct attribute_group tpdm_cmb_attr_grp = {
> .is_visible = tpdm_cmb_is_visible,
> };
>
> +static struct attribute_group tpdm_cmb_trig_patt_grp = {
> + .attrs = tpdm_cmb_trig_patt_attrs,
> + .is_visible = tpdm_cmb_is_visible,
> + .name = "cmb_trig_patt",
> +};
> +
> +static struct attribute_group tpdm_cmb_patt_grp = {
> + .attrs = tpdm_cmb_patt_attrs,
> + .is_visible = tpdm_cmb_is_visible,
> + .name = "cmb_patt",
> +};
> +
> static const struct attribute_group *tpdm_attr_grps[] = {
> &tpdm_attr_grp,
> &tpdm_dsb_attr_grp,
> @@ -941,6 +1033,8 @@ static const struct attribute_group *tpdm_attr_grps[] = {
> &tpdm_dsb_patt_grp,
> &tpdm_dsb_msr_grp,
> &tpdm_cmb_attr_grp,
> + &tpdm_cmb_trig_patt_grp,
> + &tpdm_cmb_patt_grp,
> NULL,
> };
>
> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
> index 2af92c270ed1..8cb8a9b35384 100644
> --- a/drivers/hwtracing/coresight/coresight-tpdm.h
> +++ b/drivers/hwtracing/coresight/coresight-tpdm.h
> @@ -11,12 +11,23 @@
>
> /* CMB Subunit Registers */
> #define TPDM_CMB_CR (0xA00)
> +/*CMB subunit timestamp pattern registers*/
> +#define TPDM_CMB_TPR(n) (0xA08 + (n * 4))
> +/*CMB subunit timestamp pattern mask registers*/
> +#define TPDM_CMB_TPMR(n) (0xA10 + (n * 4))
> +/*CMB subunit trigger pattern registers*/
> +#define TPDM_CMB_XPR(n) (0xA18 + (n * 4))
> +/*CMB subunit trigger pattern mask registers*/
minor nit: Leave a space after/before '/*' & '*/'
Suzuki
On 1/30/2024 8:40 PM, Suzuki K Poulose wrote:
> On 30/01/2024 09:02, Tao Zhang wrote:
>> Timestamps are requested if the monitor’s CMB data set unit input
>> data matches the value in the Monitor CMB timestamp pattern and mask
>> registers (M_CMB_TPR and M_CMB_TPMR) when CMB timestamp enabled
>> via the timestamp insertion enable register bit(CMB_TIER.PATT_TSENAB).
>> The pattern match trigger output is achieved via setting values into
>> the CMB trigger pattern and mask registers (CMB_XPR and CMB_XPMR).
>> After configuring a pattern through these registers, the TPDM subunit
>> will assert an output trigger every time it receives new input data
>> that matches the configured pattern value. Values in a given bit
>> number of the mask register correspond to the same bit number in
>> the corresponding pattern register.
>>
>> Reviewed-by: James Clark <james.clark@arm.com>
>> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
>> Signed-off-by: Jinlong Mao <quic_jinlmao@quicinc.com>
>> ---
>> .../testing/sysfs-bus-coresight-devices-tpdm | 30 ++++++
>> drivers/hwtracing/coresight/coresight-tpdm.c | 96 ++++++++++++++++++-
>> drivers/hwtracing/coresight/coresight-tpdm.h | 39 ++++++++
>> 3 files changed, 164 insertions(+), 1 deletion(-)
>>
>> diff --git
>> a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> index 6dfb18d6d64a..b6cf050861ed 100644
>> --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>> @@ -184,3 +184,33 @@ Description: (Write) Set the data collection
>> mode of CMB tpdm. Continuous
>> Accepts only one of the 2 values - 0 or 1.
>> 0 : Continuous CMB collection mode.
>> 1 : Trace-on-change CMB collection mode.
>> +
>> +What: /sys/bus/coresight/devices/<tpdm-name>/cmb_trig_patt/xpr[0:1]
>> +Date: January 2024
>> +KernelVersion 6.9
>> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang
>> (QUIC) <quic_taozha@quicinc.com>
>> +Description:
>> + (RW) Set/Get the value of the trigger pattern for the CMB
>> + subunit TPDM.
>> +
>> +What: /sys/bus/coresight/devices/<tpdm-name>/cmb_trig_patt/xpmr[0:1]
>> +Date: January 2024
>> +KernelVersion 6.9
>> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang
>> (QUIC) <quic_taozha@quicinc.com>
>> +Description:
>> + (RW) Set/Get the mask of the trigger pattern for the CMB
>> + subunit TPDM.
>> +
>> +What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpr[0:1]
>> +Date: January 2024
>> +KernelVersion 6.9
>> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang
>> (QUIC) <quic_taozha@quicinc.com>
>> +Description:
>> + (RW) Set/Get the value of the pattern for the CMB subunit TPDM.
>> +
>> +What: /sys/bus/coresight/devices/<tpdm-name>/dsb_patt/tpmr[0:1]
>> +Date: January 2024
>> +KernelVersion 6.9
>> +Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang
>> (QUIC) <quic_taozha@quicinc.com>
>> +Description:
>> + (RW) Set/Get the mask of the pattern for the CMB subunit TPDM.
>> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c
>> b/drivers/hwtracing/coresight/coresight-tpdm.c
>> index b20071460375..07587287d9fa 100644
>> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
>> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
>> @@ -66,6 +66,26 @@ static ssize_t tpdm_simple_dataset_show(struct
>> device *dev,
>> return -EINVAL;
>> return sysfs_emit(buf, "0x%x\n",
>> drvdata->dsb->msr[tpdm_attr->idx]);
>> + case CMB_TRIG_PATT:
>> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
>> + return -EINVAL;
>> + return sysfs_emit(buf, "0x%x\n",
>> + drvdata->cmb->trig_patt[tpdm_attr->idx]);
>> + case CMB_TRIG_PATT_MASK:
>> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
>> + return -EINVAL;
>> + return sysfs_emit(buf, "0x%x\n",
>> + drvdata->cmb->trig_patt_mask[tpdm_attr->idx]);
>> + case CMB_PATT:
>> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
>> + return -EINVAL;
>> + return sysfs_emit(buf, "0x%x\n",
>> + drvdata->cmb->patt_val[tpdm_attr->idx]);
>> + case CMB_PATT_MASK:
>> + if (tpdm_attr->idx >= TPDM_CMB_MAX_PATT)
>> + return -EINVAL;
>> + return sysfs_emit(buf, "0x%x\n",
>> + drvdata->cmb->patt_mask[tpdm_attr->idx]);
>> }
>> return -EINVAL;
>> }
>> @@ -118,6 +138,30 @@ static ssize_t tpdm_simple_dataset_store(struct
>> device *dev,
>> ret = size;
>> }
>> break;
>> + case CMB_TRIG_PATT:
>> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
>> + drvdata->cmb->trig_patt[tpdm_attr->idx] = val;
>> + ret = size;
>> + }
>> + break;
>> + case CMB_TRIG_PATT_MASK:
>> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
>> + drvdata->cmb->trig_patt_mask[tpdm_attr->idx] = val;
>> + ret = size;
>> + }
>> + break;
>> + case CMB_PATT:
>> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
>> + drvdata->cmb->patt_val[tpdm_attr->idx] = val;
>> + ret = size;
>> + }
>> + break;
>> + case CMB_PATT_MASK:
>> + if (tpdm_attr->idx < TPDM_CMB_MAX_PATT) {
>> + drvdata->cmb->patt_mask[tpdm_attr->idx] = val;
>> + ret = size;
>> + }
>> + break;
>> default:
>> break;
>> }
>> @@ -280,12 +324,32 @@ static void tpdm_enable_dsb(struct tpdm_drvdata
>> *drvdata)
>> static void tpdm_enable_cmb(struct tpdm_drvdata *drvdata)
>> {
>> - u32 val;
>> + u32 val, i;
>> if (!tpdm_has_cmb_dataset(drvdata))
>> return;
>> + /* Configure pattern registers */
>> + for (i = 0; i < TPDM_CMB_MAX_PATT; i++) {
>> + writel_relaxed(drvdata->cmb->patt_val[i],
>> + drvdata->base + TPDM_CMB_TPR(i));
>> + writel_relaxed(drvdata->cmb->patt_mask[i],
>> + drvdata->base + TPDM_CMB_TPMR(i));
>> + writel_relaxed(drvdata->cmb->trig_patt[i],
>> + drvdata->base + TPDM_CMB_XPR(i));
>> + writel_relaxed(drvdata->cmb->trig_patt_mask[i],
>> + drvdata->base + TPDM_CMB_XPMR(i));
>> + }
>> +
>> val = readl_relaxed(drvdata->base + TPDM_CMB_CR);
>> + /*
>> + * Set to 0 for continuous CMB collection mode,
>> + * 1 for trace-on-change CMB collection mode.
>> + */
>> + if (drvdata->cmb->trace_mode)
>> + val |= TPDM_CMB_CR_MODE;
>> + else
>> + val &= ~TPDM_CMB_CR_MODE;
>> /* Set the enable bit of CMB control register to 1 */
>> val |= TPDM_CMB_CR_ENA;
>> writel_relaxed(val, drvdata->base + TPDM_CMB_CR);
>> @@ -887,6 +951,22 @@ static struct attribute *tpdm_dsb_msr_attrs[] = {
>> NULL,
>> };
>> +static struct attribute *tpdm_cmb_trig_patt_attrs[] = {
>> + CMB_TRIG_PATT_ATTR(0),
>> + CMB_TRIG_PATT_ATTR(1),
>> + CMB_TRIG_PATT_MASK_ATTR(0),
>> + CMB_TRIG_PATT_MASK_ATTR(1),
>> + NULL,
>> +};
>> +
>> +static struct attribute *tpdm_cmb_patt_attrs[] = {
>> + CMB_PATT_ATTR(0),
>> + CMB_PATT_ATTR(1),
>> + CMB_PATT_MASK_ATTR(0),
>> + CMB_PATT_MASK_ATTR(1),
>> + NULL,
>> +};
>> +
>> static struct attribute *tpdm_dsb_attrs[] = {
>> &dev_attr_dsb_mode.attr,
>> &dev_attr_dsb_trig_ts.attr,
>> @@ -933,6 +1013,18 @@ static struct attribute_group tpdm_cmb_attr_grp
>> = {
>> .is_visible = tpdm_cmb_is_visible,
>> };
>> +static struct attribute_group tpdm_cmb_trig_patt_grp = {
>> + .attrs = tpdm_cmb_trig_patt_attrs,
>> + .is_visible = tpdm_cmb_is_visible,
>> + .name = "cmb_trig_patt",
>> +};
>> +
>> +static struct attribute_group tpdm_cmb_patt_grp = {
>> + .attrs = tpdm_cmb_patt_attrs,
>> + .is_visible = tpdm_cmb_is_visible,
>> + .name = "cmb_patt",
>> +};
>> +
>> static const struct attribute_group *tpdm_attr_grps[] = {
>> &tpdm_attr_grp,
>> &tpdm_dsb_attr_grp,
>> @@ -941,6 +1033,8 @@ static const struct attribute_group
>> *tpdm_attr_grps[] = {
>> &tpdm_dsb_patt_grp,
>> &tpdm_dsb_msr_grp,
>> &tpdm_cmb_attr_grp,
>> + &tpdm_cmb_trig_patt_grp,
>> + &tpdm_cmb_patt_grp,
>> NULL,
>> };
>> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h
>> b/drivers/hwtracing/coresight/coresight-tpdm.h
>> index 2af92c270ed1..8cb8a9b35384 100644
>> --- a/drivers/hwtracing/coresight/coresight-tpdm.h
>> +++ b/drivers/hwtracing/coresight/coresight-tpdm.h
>> @@ -11,12 +11,23 @@
>> /* CMB Subunit Registers */
>> #define TPDM_CMB_CR (0xA00)
>> +/*CMB subunit timestamp pattern registers*/
>> +#define TPDM_CMB_TPR(n) (0xA08 + (n * 4))
>> +/*CMB subunit timestamp pattern mask registers*/
>> +#define TPDM_CMB_TPMR(n) (0xA10 + (n * 4))
>> +/*CMB subunit trigger pattern registers*/
>> +#define TPDM_CMB_XPR(n) (0xA18 + (n * 4))
>> +/*CMB subunit trigger pattern mask registers*/
>
> minor nit: Leave a space after/before '/*' & '*/'
Sure, I will update this to the next patch series.
Best,
Tao
>
> Suzuki
>
>
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