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Date: Wed, 29 Mar 2023 01:47:41 -0700
From: Mao Jinlong <quic_jinlmao@...cinc.com>
To: Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Suzuki K Poulose <suzuki.poulose@....com>,
Mike Leach <mike.leach@...aro.org>,
Leo Yan <leo.yan@...aro.org>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC: Mao Jinlong <quic_jinlmao@...cinc.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <coresight@...ts.linaro.org>,
<devicetree@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
Tingwei Zhang <quic_tingweiz@...cinc.com>,
Yuanfang Zhang <quic_yuanfang@...cinc.com>,
Tao Zhang <quic_taozha@...cinc.com>,
Hao Zhang <quic_hazha@...cinc.com>
Subject: [PATCH v1 5/8] coresight-tpdm: Add msr register support for CMB
Add the nodes for CMB subunit MSR(mux select register) support.
CMB MSRs(mux select registers) is to separate mux,arbitration,
,interleaving,data packing control from stream filtering control.
Signed-off-by: Mao Jinlong <quic_jinlmao@...cinc.com>
---
.../testing/sysfs-bus-coresight-devices-tpdm | 6 ++
drivers/hwtracing/coresight/coresight-tpdm.c | 59 +++++++++++++++++++
drivers/hwtracing/coresight/coresight-tpdm.h | 6 ++
3 files changed, 71 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
index aa357f463d03..403c45fcdcfe 100644
--- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
+++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
@@ -212,3 +212,9 @@ Description: (RW) Read or write the status of timestamp upon all interface.
Only value 0 and 1 can be written to this node. Set this node to 1 to requeset
timestamp to all trace packet.
+What: /sys/bus/coresight/devices/<tpdm-name>/cmb_msr
+Date: March 2023
+KernelVersion 6.3
+Contact: Jinlong Mao <quic_jinlmao@...cinc.com>
+Description: (RW) Read or write the value of CMB msr.
+
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index 88bb740cddd6..91b9ec80bf23 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -72,6 +72,14 @@ static int tpdm_init_datasets(struct tpdm_drvdata *drvdata)
if (!drvdata->cmb)
return -ENOMEM;
}
+
+ /* Get cmb msr number*/
+ of_property_read_u32(drvdata->dev->of_node, "qcom,cmb-msr-num",
+ &drvdata->cmb->msr_num);
+ drvdata->cmb->msr = devm_kzalloc(drvdata->dev,
+ (drvdata->cmb->msr_num * sizeof(u32)), GFP_KERNEL);
+ if (!drvdata->cmb->msr)
+ return -ENOMEM;
}
return 0;
@@ -206,6 +214,12 @@ static void tpdm_enable_cmb(struct tpdm_drvdata *drvdata)
val = val & ~TPDM_CMB_TIER_TS_ALL;
writel_relaxed(val, drvdata->base + TPDM_CMB_TIER);
+ /* Configure MSR registers */
+ if (drvdata->cmb->msr_num != 0)
+ for (i = 0; i < drvdata->cmb->msr_num; i++)
+ writel_relaxed(drvdata->cmb->msr[i],
+ drvdata->base + TPDM_CMB_MSR(i));
+
val = readl_relaxed(drvdata->base + TPDM_CMB_CR);
/*
* Set to 0 for continuous CMB collection mode,
@@ -1159,6 +1173,50 @@ static ssize_t cmb_trig_ts_store(struct device *dev,
}
static DEVICE_ATTR_RW(cmb_trig_ts);
+static ssize_t cmb_msr_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ unsigned int i;
+ ssize_t size = 0;
+
+ if (drvdata->cmb->msr_num == 0)
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ for (i = 0; i < drvdata->cmb->msr_num; i++) {
+ size += sysfs_emit_at(buf, size,
+ "%u 0x%x\n", i, drvdata->cmb->msr[i]);
+ }
+ spin_unlock(&drvdata->spinlock);
+
+ return size;
+}
+
+static ssize_t cmb_msr_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t size)
+{
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ unsigned int num, val;
+ int nval;
+
+ if (drvdata->cmb->msr_num == 0)
+ return -EINVAL;
+
+ nval = sscanf(buf, "%u %x", &num, &val);
+ if ((nval != 2) || (num >= (drvdata->cmb->msr_num - 1)))
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ drvdata->cmb->msr[num] = val;
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+static DEVICE_ATTR_RW(cmb_msr);
+
static struct attribute *tpdm_dsb_attrs[] = {
&dev_attr_dsb_mode.attr,
&dev_attr_dsb_edge_ctrl.attr,
@@ -1184,6 +1242,7 @@ static struct attribute *tpdm_cmb_attrs[] = {
&dev_attr_cmb_patt_ts.attr,
&dev_attr_cmb_ts_all.attr,
&dev_attr_cmb_trig_ts.attr,
+ &dev_attr_cmb_msr.attr,
NULL,
};
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
index 88ade2f2ef6c..d783fc94252b 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.h
+++ b/drivers/hwtracing/coresight/coresight-tpdm.h
@@ -22,6 +22,8 @@
#define TPDM_CMB_XPR(n) (0xA18 + (n * 4))
/*CMB subunit trigger pattern mask registers*/
#define TPDM_CMB_XPMR(n) (0xA20 + (n * 4))
+/* CMB MSR register */
+#define TPDM_CMB_MSR(n) (0xA80 + (n * 4))
/* Enable bit for CMB subunit */
#define TPDM_CMB_CR_ENA BIT(0)
@@ -145,6 +147,8 @@ struct dsb_dataset {
* @patt_mask: Save value for pattern mask
* @trig_patt_val: Save value for trigger pattern
* @trig_patt_mask: Save value for trigger pattern mask
+ * @msr_num: The number of msr register
+ * @msr: Save value for msr registers
* @patt_ts: Indicates if pattern match for timestamp is enabled.
* @trig_ts: Indicates if CTI trigger for timestamp is enabled.
* @ts_all: Indicates if timestamp is enabled for all packets.
@@ -155,6 +159,8 @@ struct cmb_dataset {
u32 patt_mask[TPDM_CMB_MAX_PATT];
u32 trig_patt_val[TPDM_CMB_MAX_PATT];
u32 trig_patt_mask[TPDM_CMB_MAX_PATT];
+ u32 msr_num;
+ u32 *msr;
bool patt_ts;
bool trig_ts;
bool ts_all;
--
2.39.0
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