[PATCH v10 10/13] coresight-tpdm: Add nodes to configure pattern match output
From: Tao Zhang
Date: Thu Sep 28 2023 - 02:32:25 EST
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@xxxxxxxxxxx>
---
.../testing/sysfs-bus-coresight-devices-tpdm | 18 +++-
drivers/hwtracing/coresight/coresight-tpdm.c | 82 ++++++++++++++++++-
drivers/hwtracing/coresight/coresight-tpdm.h | 28 +++++++
3 files changed, 126 insertions(+), 2 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
index 6853bb1295e3..2252e4706a90 100644
--- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
+++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
@@ -107,4 +107,20 @@ Date: March 2023
KernelVersion 6.7
Contact: Jinlong Mao (QUIC) <quic_jinlmao@xxxxxxxxxxx>, Tao Zhang (QUIC) <quic_taozha@xxxxxxxxxxx>
Description:
- Read a set of the edge control mask of the DSB in TPDM.
\ No newline at end of file
+ Read a set of the edge control mask of the DSB in TPDM.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_trig_patt/xpr[0:7]
+Date: March 2023
+KernelVersion 6.7
+Contact: Jinlong Mao (QUIC) <quic_jinlmao@xxxxxxxxxxx>, Tao Zhang (QUIC) <quic_taozha@xxxxxxxxxxx>
+Description:
+ (RW) Set/Get the value of the trigger pattern for the DSB
+ subunit TPDM.
+
+What: /sys/bus/coresight/devices/<tpdm-name>/dsb_trig_patt/xpmr[0:7]
+Date: March 2023
+KernelVersion 6.7
+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
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index 7175e70c2c4e..e04c41f83265 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -41,10 +41,58 @@ static ssize_t tpdm_simple_dataset_show(struct device *dev,
return -EINVAL;
return sysfs_emit(buf, "0x%x\n",
drvdata->dsb->edge_ctrl_mask[tpdm_attr->idx]);
+ case DSB_TRIG_PATT:
+ if (tpdm_attr->idx >= TPDM_DSB_MAX_PATT)
+ return -EINVAL;
+ return sysfs_emit(buf, "0x%x\n",
+ drvdata->dsb->trig_patt[tpdm_attr->idx]);
+ case DSB_TRIG_PATT_MASK:
+ if (tpdm_attr->idx >= TPDM_DSB_MAX_PATT)
+ return -EINVAL;
+ return sysfs_emit(buf, "0x%x\n",
+ drvdata->dsb->trig_patt_mask[tpdm_attr->idx]);
}
return -EINVAL;
}
+/* Write dataset array member with the index number */
+static ssize_t tpdm_simple_dataset_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t size)
+{
+ unsigned long val;
+ ssize_t ret = size;
+
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct tpdm_dataset_attribute *tpdm_attr =
+ container_of(attr, struct tpdm_dataset_attribute, attr);
+
+ if (kstrtoul(buf, 0, &val))
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ switch (tpdm_attr->mem) {
+ case DSB_TRIG_PATT:
+ if (tpdm_attr->idx < TPDM_DSB_MAX_PATT)
+ drvdata->dsb->trig_patt[tpdm_attr->idx] = val;
+ else
+ ret = -EINVAL;
+ break;
+ case DSB_TRIG_PATT_MASK:
+ if (tpdm_attr->idx < TPDM_DSB_MAX_PATT)
+ drvdata->dsb->trig_patt_mask[tpdm_attr->idx] = val;
+ else
+ ret = -EINVAL;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ spin_unlock(&drvdata->spinlock);
+
+ return ret;
+}
+
static bool tpdm_has_dsb_dataset(struct tpdm_drvdata *drvdata)
{
return (drvdata->datasets & TPDM_PIDR0_DS_DSB);
@@ -103,7 +151,12 @@ static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
for (i = 0; i < TPDM_DSB_MAX_EDCMR; i++)
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[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)
@@ -532,6 +585,26 @@ static struct attribute *tpdm_dsb_edge_attrs[] = {
NULL,
};
+static struct attribute *tpdm_dsb_trig_patt_attrs[] = {
+ DSB_TRIG_PATT_ATTR(0),
+ DSB_TRIG_PATT_ATTR(1),
+ DSB_TRIG_PATT_ATTR(2),
+ DSB_TRIG_PATT_ATTR(3),
+ DSB_TRIG_PATT_ATTR(4),
+ DSB_TRIG_PATT_ATTR(5),
+ DSB_TRIG_PATT_ATTR(6),
+ DSB_TRIG_PATT_ATTR(7),
+ DSB_TRIG_PATT_MASK_ATTR(0),
+ DSB_TRIG_PATT_MASK_ATTR(1),
+ DSB_TRIG_PATT_MASK_ATTR(2),
+ DSB_TRIG_PATT_MASK_ATTR(3),
+ DSB_TRIG_PATT_MASK_ATTR(4),
+ DSB_TRIG_PATT_MASK_ATTR(5),
+ DSB_TRIG_PATT_MASK_ATTR(6),
+ DSB_TRIG_PATT_MASK_ATTR(7),
+ NULL,
+};
+
static struct attribute *tpdm_dsb_attrs[] = {
&dev_attr_dsb_mode.attr,
&dev_attr_dsb_trig_ts.attr,
@@ -550,10 +623,17 @@ static struct attribute_group tpdm_dsb_edge_grp = {
.name = "dsb_edge",
};
+static struct attribute_group tpdm_dsb_trig_patt_grp = {
+ .attrs = tpdm_dsb_trig_patt_attrs,
+ .is_visible = tpdm_dsb_is_visible,
+ .name = "dsb_trig_patt",
+};
+
static const struct attribute_group *tpdm_attr_grps[] = {
&tpdm_attr_grp,
&tpdm_dsb_attr_grp,
&tpdm_dsb_edge_grp,
+ &tpdm_dsb_trig_patt_grp,
NULL,
};
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
index a9c65d96316a..2cf7bdbdbb15 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))
@@ -80,6 +82,8 @@
#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
#define tpdm_simple_dataset_ro(name, mem, idx) \
(&((struct tpdm_dataset_attribute[]) { \
@@ -90,6 +94,16 @@
} \
})[0].attr.attr)
+#define tpdm_simple_dataset_rw(name, mem, idx) \
+ (&((struct tpdm_dataset_attribute[]) { \
+ { \
+ __ATTR(name, 0644, tpdm_simple_dataset_show, \
+ tpdm_simple_dataset_store), \
+ mem, \
+ idx, \
+ } \
+ })[0].attr.attr)
+
#define DSB_EDGE_CTRL_ATTR(nr) \
tpdm_simple_dataset_ro(edcr##nr, \
DSB_EDGE_CTRL, nr)
@@ -98,12 +112,22 @@
tpdm_simple_dataset_ro(edcmr##nr, \
DSB_EDGE_CTRL_MASK, nr)
+#define DSB_TRIG_PATT_ATTR(nr) \
+ tpdm_simple_dataset_rw(xpr##nr, \
+ DSB_TRIG_PATT, nr)
+
+#define DSB_TRIG_PATT_MASK_ATTR(nr) \
+ tpdm_simple_dataset_rw(xpmr##nr, \
+ DSB_TRIG_PATT_MASK, nr)
+
/**
* 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
+ * @trig_patt: 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.
*/
@@ -112,6 +136,8 @@ struct dsb_dataset {
u32 edge_ctrl_idx;
u32 edge_ctrl[TPDM_DSB_MAX_EDCR];
u32 edge_ctrl_mask[TPDM_DSB_MAX_EDCMR];
+ u32 trig_patt[TPDM_DSB_MAX_PATT];
+ u32 trig_patt_mask[TPDM_DSB_MAX_PATT];
bool trig_ts;
bool trig_type;
};
@@ -141,6 +167,8 @@ struct tpdm_drvdata {
enum dataset_mem {
DSB_EDGE_CTRL,
DSB_EDGE_CTRL_MASK,
+ DSB_TRIG_PATT,
+ DSB_TRIG_PATT_MASK,
};
/**
--
2.17.1