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From:   Tao Zhang <quic_taozha@quicinc.com>
To:     Mathieu Poirier <mathieu.poirier@linaro.org>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Konrad Dybcio <konradybcio@gmail.com>,
        Mike Leach <mike.leach@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
CC:     Tao Zhang <quic_taozha@quicinc.com>,
        Jinlong Mao <quic_jinlmao@quicinc.com>,
        Leo Yan <leo.yan@linaro.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        <coresight@lists.linaro.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
        Tingwei Zhang <quic_tingweiz@quicinc.com>,
        Yuanfang Zhang <quic_yuanfang@quicinc.com>,
        Trilok Soni <quic_tsoni@quicinc.com>,
        Hao Zhang <quic_hazha@quicinc.com>,
        <linux-arm-msm@vger.kernel.org>, <andersson@kernel.org>
Subject: [PATCH v6 10/13] coresight-tpdm: Add nodes to configure pattern match output
Date:   Tue, 20 Jun 2023 15:32:38 +0800
Message-ID: <1687246361-23607-11-git-send-email-quic_taozha@quicinc.com>
In-Reply-To: <1687246361-23607-1-git-send-email-quic_taozha@quicinc.com>
References: <1687246361-23607-1-git-send-email-quic_taozha@quicinc.com>
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Add nodes to configure trigger pattern and trigger pattern mask.
Each DSB subunit TPDM has maximum of n(n<7) XPR registers to
configure trigger pattern match output. Eight 32 bit registers
providing DSB interface trigger output pattern match comparison.
And each DSB subunit TPDM has maximum of m(m<7) XPMR registers to
configure trigger pattern mask match output. Eight 32 bit
registers providing DSB interface trigger output pattern match
mask.

Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
---
 .../ABI/testing/sysfs-bus-coresight-devices-tpdm   | 28 +++++++
 drivers/hwtracing/coresight/coresight-tpdm.c       | 93 ++++++++++++++++++++++
 drivers/hwtracing/coresight/coresight-tpdm.h       | 12 ++-
 3 files changed, 131 insertions(+), 2 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
index 34189e4a..55ec81d 100644
--- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
+++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
@@ -92,3 +92,31 @@ Description:
 		<integer1> : Start EDCMR register number
 		<integer2> : End EDCMR register number
 		<integer3> : The value need to be written
+
+What:		/sys/bus/coresight/devices/<tpdm-name>/dsb_trig_patt_val
+Date:		March 2023
+KernelVersion	6.5
+Contact:	Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
+Description:
+		(Write) Set the trigger pattern value of DSB tpdm.
+		Read the trigger pattern value of DSB tpdm.
+
+		Expected format is the following:
+		<integer1> <integer2>
+
+		Where:
+		<integer1> : Index number of XPR register, the range is 0 to 7
+
+What:		/sys/bus/coresight/devices/<tpdm-name>/dsb_trig_patt_mask
+Date:		March 2023
+KernelVersion	6.5
+Contact:	Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com>
+Description:
+		(Write) Set the trigger pattern mask of DSB tpdm.
+		Read the trigger pattern mask of DSB tpdm.
+
+		Expected format is the following:
+		<integer1> <integer2>
+
+		Where:
+		<integer1> : Index number of XPMR register,  the range is 0 to 7
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index fc92900..974e63f 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -80,6 +80,13 @@ 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->trig_patt_val[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)
@@ -441,6 +448,90 @@ static ssize_t dsb_edge_ctrl_mask_store(struct device *dev,
 }
 static DEVICE_ATTR_RW(dsb_edge_ctrl_mask);
 
+static ssize_t dsb_trig_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;
+	unsigned long bytes;
+	int i = 0;
+
+	spin_lock(&drvdata->spinlock);
+	for (i = 0; i < TPDM_DSB_MAX_PATT; i++) {
+		bytes = sysfs_emit_at(buf, size,
+				  "Index: 0x%x Value: 0x%x\n", i,
+				  drvdata->dsb->trig_patt_val[i]);
+		if (bytes <= 0)
+			break;
+		size += bytes;
+	}
+	spin_unlock(&drvdata->spinlock);
+	return size;
+}
+
+static ssize_t dsb_trig_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->trig_patt_val[index] = val;
+	spin_unlock(&drvdata->spinlock);
+	return size;
+}
+static DEVICE_ATTR_RW(dsb_trig_patt_val);
+
+static ssize_t dsb_trig_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;
+	unsigned long bytes;
+	int i = 0;
+
+	spin_lock(&drvdata->spinlock);
+	for (i = 0; i < TPDM_DSB_MAX_PATT; i++) {
+		bytes = sysfs_emit_at(buf, size,
+				  "Index: 0x%x Value: 0x%x\n", i,
+				  drvdata->dsb->trig_patt_mask[i]);
+		if (bytes <= 0)
+			break;
+		size += bytes;
+	}
+	spin_unlock(&drvdata->spinlock);
+	return size;
+}
+
+static ssize_t dsb_trig_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->trig_patt_mask[index] = val;
+	spin_unlock(&drvdata->spinlock);
+	return size;
+}
+static DEVICE_ATTR_RW(dsb_trig_patt_mask);
+
 static ssize_t dsb_trig_type_show(struct device *dev,
 				     struct device_attribute *attr, char *buf)
 {
@@ -515,6 +606,8 @@ 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_trig_patt_val.attr,
+	&dev_attr_dsb_trig_patt_mask.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 f81bfe8..87d946e 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_XPR(n)		(0x7C8 + (n * 4))
+#define TPDM_DSB_XPMR(n)	(0x7E8 + (n * 4))
 #define TPDM_DSB_EDCR(n)	(0x808 + (n * 4))
 #define TPDM_DSB_EDCMR(n)	(0x848 + (n * 4))
 
@@ -77,19 +79,25 @@
 #define TPDM_DSB_MAX_EDCR	16
 /* MAX number of EDCMR registers */
 #define TPDM_DSB_MAX_EDCMR	8
+/* MAX number of DSB pattern */
+#define TPDM_DSB_MAX_PATT	8
 
 /**
  * struct dsb_dataset - specifics associated to dsb dataset
  * @mode:             DSB programming mode
  * @edge_ctrl:        Save value for edge control
  * @edge_ctrl_mask:   Save value for edge control mask
+ * @trig_patt_val:    Save value for trigger pattern
+ * @trig_patt_mask:   Save value for trigger pattern mask
  * @trig_ts:          Enable/Disable trigger timestamp.
  * @trig_type:        Enable/Disable trigger type.
  */
 struct dsb_dataset {
 	u32				mode;
-	u32			edge_ctrl[TPDM_DSB_MAX_EDCR];
-	u32			edge_ctrl_mask[TPDM_DSB_MAX_EDCMR];
+	u32				edge_ctrl[TPDM_DSB_MAX_EDCR];
+	u32				edge_ctrl_mask[TPDM_DSB_MAX_EDCMR];
+	u32				trig_patt_val[TPDM_DSB_MAX_PATT];
+	u32				trig_patt_mask[TPDM_DSB_MAX_PATT];
 	bool			trig_ts;
 	bool			trig_type;
 };
-- 
2.7.4