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-rw-r--r--drivers/hwtracing/coresight/coresight-cti-sysfs.c372
-rw-r--r--drivers/hwtracing/coresight/coresight-cti.c147
-rw-r--r--drivers/hwtracing/coresight/coresight-cti.h32
3 files changed, 551 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-cti-sysfs.c b/drivers/hwtracing/coresight/coresight-cti-sysfs.c
index 40d31d73b27c..565e17680dea 100644
--- a/drivers/hwtracing/coresight/coresight-cti-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-cti-sysfs.c
@@ -474,6 +474,372 @@ static struct attribute *coresight_cti_regs_attrs[] = {
NULL,
};
+/* CTI channel x-trigger programming */
+static int
+cti_trig_op_parse(struct device *dev, enum cti_chan_op op,
+ enum cti_trig_dir dir, const char *buf, size_t size)
+{
+ u32 chan_idx;
+ u32 trig_idx;
+ int items, err = -EINVAL;
+
+ /* extract chan idx and trigger idx */
+ items = sscanf(buf, "%d %d", &chan_idx, &trig_idx);
+ if (items == 2) {
+ err = cti_channel_trig_op(dev, op, dir, chan_idx, trig_idx);
+ if (!err)
+ err = size;
+ }
+ return err;
+}
+
+static ssize_t trigin_attach_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ return cti_trig_op_parse(dev, CTI_CHAN_ATTACH, CTI_TRIG_IN,
+ buf, size);
+}
+static DEVICE_ATTR_WO(trigin_attach);
+
+static ssize_t trigin_detach_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ return cti_trig_op_parse(dev, CTI_CHAN_DETACH, CTI_TRIG_IN,
+ buf, size);
+}
+static DEVICE_ATTR_WO(trigin_detach);
+
+static ssize_t trigout_attach_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ return cti_trig_op_parse(dev, CTI_CHAN_ATTACH, CTI_TRIG_OUT,
+ buf, size);
+}
+static DEVICE_ATTR_WO(trigout_attach);
+
+static ssize_t trigout_detach_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ return cti_trig_op_parse(dev, CTI_CHAN_DETACH, CTI_TRIG_OUT,
+ buf, size);
+}
+static DEVICE_ATTR_WO(trigout_detach);
+
+
+static ssize_t chan_gate_enable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int err = 0, channel = 0;
+
+ if (kstrtoint(buf, 0, &channel))
+ return -EINVAL;
+
+ err = cti_channel_gate_op(dev, CTI_GATE_CHAN_ENABLE, channel);
+ return err ? err : size;
+}
+
+static ssize_t chan_gate_enable_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_config *cfg = &drvdata->config;
+ unsigned long ctigate_bitmask = cfg->ctigate;
+ int size = 0;
+
+ if (cfg->ctigate == 0)
+ size = sprintf(buf, "\n");
+ else
+ size = bitmap_print_to_pagebuf(true, buf, &ctigate_bitmask,
+ cfg->nr_ctm_channels);
+ return size;
+}
+static DEVICE_ATTR_RW(chan_gate_enable);
+
+static ssize_t chan_gate_disable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int err = 0, channel = 0;
+
+ if (kstrtoint(buf, 0, &channel))
+ return -EINVAL;
+
+ err = cti_channel_gate_op(dev, CTI_GATE_CHAN_DISABLE, channel);
+ return err ? err : size;
+}
+static DEVICE_ATTR_WO(chan_gate_disable);
+
+static int
+chan_op_parse(struct device *dev, enum cti_chan_set_op op, const char *buf)
+{
+ int err = 0, channel = 0;
+
+ if (kstrtoint(buf, 0, &channel))
+ return -EINVAL;
+
+ err = cti_channel_setop(dev, op, channel);
+ return err;
+
+}
+
+static ssize_t chan_set_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int err = chan_op_parse(dev, CTI_CHAN_SET, buf);
+
+ return err ? err : size;
+}
+static DEVICE_ATTR_WO(chan_set);
+
+static ssize_t chan_clear_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int err = chan_op_parse(dev, CTI_CHAN_CLR, buf);
+
+ return err ? err : size;
+}
+static DEVICE_ATTR_WO(chan_clear);
+
+static ssize_t chan_pulse_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int err = chan_op_parse(dev, CTI_CHAN_PULSE, buf);
+
+ return err ? err : size;
+}
+static DEVICE_ATTR_WO(chan_pulse);
+
+static ssize_t trig_filter_enable_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 val;
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+ spin_lock(&drvdata->spinlock);
+ val = drvdata->config.trig_filter_enable;
+ spin_unlock(&drvdata->spinlock);
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t trig_filter_enable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ unsigned long val;
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+ if (kstrtoul(buf, 0, &val))
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ drvdata->config.trig_filter_enable = !!val;
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+static DEVICE_ATTR_RW(trig_filter_enable);
+
+static ssize_t trigout_filtered_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_config *cfg = &drvdata->config;
+ int size = 0, nr_trig_max = cfg->nr_trig_max;
+ unsigned long mask = cfg->trig_out_filter;
+
+ if (mask)
+ size = bitmap_print_to_pagebuf(true, buf, &mask, nr_trig_max);
+ return size;
+}
+static DEVICE_ATTR_RO(trigout_filtered);
+
+/* clear all xtrigger / channel programming */
+static ssize_t chan_xtrigs_reset_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int i;
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_config *config = &drvdata->config;
+
+ spin_lock(&drvdata->spinlock);
+
+ /* clear the CTI trigger / channel programming registers */
+ for (i = 0; i < config->nr_trig_max; i++) {
+ config->ctiinen[i] = 0;
+ config->ctiouten[i] = 0;
+ }
+
+ /* clear the other regs */
+ config->ctigate = GENMASK(config->nr_ctm_channels - 1, 0);
+ config->asicctl = 0;
+ config->ctiappset = 0;
+ config->ctiinout_sel = 0;
+ config->xtrig_rchan_sel = 0;
+
+ /* if enabled then write through */
+ if (cti_active(config))
+ cti_write_all_hw_regs(drvdata);
+
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+static DEVICE_ATTR_WO(chan_xtrigs_reset);
+
+/*
+ * Write to select a channel to view, read to display the
+ * cross triggers for the selected channel.
+ */
+static ssize_t chan_xtrigs_sel_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ unsigned long val;
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+ if (kstrtoul(buf, 0, &val))
+ return -EINVAL;
+ if (val > (drvdata->config.nr_ctm_channels - 1))
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ drvdata->config.xtrig_rchan_sel = val;
+ spin_unlock(&drvdata->spinlock);
+ return size;
+}
+
+static ssize_t chan_xtrigs_sel_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ unsigned long val;
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+ spin_lock(&drvdata->spinlock);
+ val = drvdata->config.xtrig_rchan_sel;
+ spin_unlock(&drvdata->spinlock);
+
+ return sprintf(buf, "%ld\n", val);
+}
+static DEVICE_ATTR_RW(chan_xtrigs_sel);
+
+static ssize_t chan_xtrigs_in_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_config *cfg = &drvdata->config;
+ int used = 0, reg_idx;
+ int nr_trig_max = drvdata->config.nr_trig_max;
+ u32 chan_mask = BIT(cfg->xtrig_rchan_sel);
+
+ for (reg_idx = 0; reg_idx < nr_trig_max; reg_idx++) {
+ if (chan_mask & cfg->ctiinen[reg_idx])
+ used += sprintf(buf + used, "%d ", reg_idx);
+ }
+
+ used += sprintf(buf + used, "\n");
+ return used;
+}
+static DEVICE_ATTR_RO(chan_xtrigs_in);
+
+static ssize_t chan_xtrigs_out_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_config *cfg = &drvdata->config;
+ int used = 0, reg_idx;
+ int nr_trig_max = drvdata->config.nr_trig_max;
+ u32 chan_mask = BIT(cfg->xtrig_rchan_sel);
+
+ for (reg_idx = 0; reg_idx < nr_trig_max; reg_idx++) {
+ if (chan_mask & cfg->ctiouten[reg_idx])
+ used += sprintf(buf + used, "%d ", reg_idx);
+ }
+
+ used += sprintf(buf + used, "\n");
+ return used;
+}
+static DEVICE_ATTR_RO(chan_xtrigs_out);
+
+static ssize_t print_chan_list(struct device *dev,
+ char *buf, bool inuse)
+{
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_config *config = &drvdata->config;
+ int size, i;
+ unsigned long inuse_bits = 0, chan_mask;
+
+ /* scan regs to get bitmap of channels in use. */
+ spin_lock(&drvdata->spinlock);
+ for (i = 0; i < config->nr_trig_max; i++) {
+ inuse_bits |= config->ctiinen[i];
+ inuse_bits |= config->ctiouten[i];
+ }
+ spin_unlock(&drvdata->spinlock);
+
+ /* inverse bits if printing free channels */
+ if (!inuse)
+ inuse_bits = ~inuse_bits;
+
+ /* list of channels, or 'none' */
+ chan_mask = GENMASK(config->nr_ctm_channels - 1, 0);
+ if (inuse_bits & chan_mask)
+ size = bitmap_print_to_pagebuf(true, buf, &inuse_bits,
+ config->nr_ctm_channels);
+ else
+ size = sprintf(buf, "\n");
+ return size;
+}
+
+static ssize_t chan_inuse_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return print_chan_list(dev, buf, true);
+}
+static DEVICE_ATTR_RO(chan_inuse);
+
+static ssize_t chan_free_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return print_chan_list(dev, buf, false);
+}
+static DEVICE_ATTR_RO(chan_free);
+
+static struct attribute *coresight_cti_channel_attrs[] = {
+ &dev_attr_trigin_attach.attr,
+ &dev_attr_trigin_detach.attr,
+ &dev_attr_trigout_attach.attr,
+ &dev_attr_trigout_detach.attr,
+ &dev_attr_trig_filter_enable.attr,
+ &dev_attr_trigout_filtered.attr,
+ &dev_attr_chan_gate_enable.attr,
+ &dev_attr_chan_gate_disable.attr,
+ &dev_attr_chan_set.attr,
+ &dev_attr_chan_clear.attr,
+ &dev_attr_chan_pulse.attr,
+ &dev_attr_chan_inuse.attr,
+ &dev_attr_chan_free.attr,
+ &dev_attr_chan_xtrigs_sel.attr,
+ &dev_attr_chan_xtrigs_in.attr,
+ &dev_attr_chan_xtrigs_out.attr,
+ &dev_attr_chan_xtrigs_reset.attr,
+ NULL,
+};
+
/* sysfs groups */
static const struct attribute_group coresight_cti_group = {
.attrs = coresight_cti_attrs,
@@ -489,9 +855,15 @@ static const struct attribute_group coresight_cti_regs_group = {
.name = "regs",
};
+static const struct attribute_group coresight_cti_channels_group = {
+ .attrs = coresight_cti_channel_attrs,
+ .name = "channels",
+};
+
const struct attribute_group *coresight_cti_groups[] = {
&coresight_cti_group,
&coresight_cti_mgmt_group,
&coresight_cti_regs_group,
+ &coresight_cti_channels_group,
NULL,
};
diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti.c
index e0748cc92384..b8c94027fed0 100644
--- a/drivers/hwtracing/coresight/coresight-cti.c
+++ b/drivers/hwtracing/coresight/coresight-cti.c
@@ -294,6 +294,153 @@ int cti_add_default_connection(struct device *dev, struct cti_drvdata *drvdata)
return ret;
}
+/** cti channel api **/
+/* attach/detach channel from trigger - write through if enabled. */
+int cti_channel_trig_op(struct device *dev, enum cti_chan_op op,
+ enum cti_trig_dir direction, u32 channel_idx,
+ u32 trigger_idx)
+{
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_config *config = &drvdata->config;
+ u32 trig_bitmask;
+ u32 chan_bitmask;
+ u32 reg_value;
+ int reg_offset;
+
+ /* ensure indexes in range */
+ if ((channel_idx >= config->nr_ctm_channels) ||
+ (trigger_idx >= config->nr_trig_max))
+ return -EINVAL;
+
+ trig_bitmask = BIT(trigger_idx);
+
+ /* ensure registered triggers and not out filtered */
+ if (direction == CTI_TRIG_IN) {
+ if (!(trig_bitmask & config->trig_in_use))
+ return -EINVAL;
+ } else {
+ if (!(trig_bitmask & config->trig_out_use))
+ return -EINVAL;
+
+ if ((config->trig_filter_enable) &&
+ (config->trig_out_filter & trig_bitmask))
+ return -EINVAL;
+ }
+
+ /* update the local register values */
+ chan_bitmask = BIT(channel_idx);
+ reg_offset = (direction == CTI_TRIG_IN ? CTIINEN(trigger_idx) :
+ CTIOUTEN(trigger_idx));
+
+ spin_lock(&drvdata->spinlock);
+
+ /* read - modify write - the trigger / channel enable value */
+ reg_value = direction == CTI_TRIG_IN ? config->ctiinen[trigger_idx] :
+ config->ctiouten[trigger_idx];
+ if (op == CTI_CHAN_ATTACH)
+ reg_value |= chan_bitmask;
+ else
+ reg_value &= ~chan_bitmask;
+
+ /* write local copy */
+ if (direction == CTI_TRIG_IN)
+ config->ctiinen[trigger_idx] = reg_value;
+ else
+ config->ctiouten[trigger_idx] = reg_value;
+
+ /* write through if enabled */
+ if (cti_active(config))
+ cti_write_single_reg(drvdata, reg_offset, reg_value);
+ spin_unlock(&drvdata->spinlock);
+ return 0;
+}
+
+int cti_channel_gate_op(struct device *dev, enum cti_chan_gate_op op,
+ u32 channel_idx)
+{
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_config *config = &drvdata->config;
+ u32 chan_bitmask;
+ u32 reg_value;
+ int err = 0;
+
+ if (channel_idx >= config->nr_ctm_channels)
+ return -EINVAL;
+
+ chan_bitmask = BIT(channel_idx);
+
+ spin_lock(&drvdata->spinlock);
+ reg_value = config->ctigate;
+ switch (op) {
+ case CTI_GATE_CHAN_ENABLE:
+ reg_value |= chan_bitmask;
+ break;
+
+ case CTI_GATE_CHAN_DISABLE:
+ reg_value &= ~chan_bitmask;
+ break;
+
+ default:
+ err = -EINVAL;
+ break;
+ }
+ if (err == 0) {
+ config->ctigate = reg_value;
+ if (cti_active(config))
+ cti_write_single_reg(drvdata, CTIGATE, reg_value);
+ }
+ spin_unlock(&drvdata->spinlock);
+ return err;
+}
+
+int cti_channel_setop(struct device *dev, enum cti_chan_set_op op,
+ u32 channel_idx)
+{
+ struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+ struct cti_config *config = &drvdata->config;
+ u32 chan_bitmask;
+ u32 reg_value;
+ u32 reg_offset;
+ int err = 0;
+
+ if (channel_idx >= config->nr_ctm_channels)
+ return -EINVAL;
+
+ chan_bitmask = BIT(channel_idx);
+
+ spin_lock(&drvdata->spinlock);
+ reg_value = config->ctiappset;
+ switch (op) {
+ case CTI_CHAN_SET:
+ config->ctiappset |= chan_bitmask;
+ reg_value = config->ctiappset;
+ reg_offset = CTIAPPSET;
+ break;
+
+ case CTI_CHAN_CLR:
+ config->ctiappset &= ~chan_bitmask;
+ reg_value = chan_bitmask;
+ reg_offset = CTIAPPCLEAR;
+ break;
+
+ case CTI_CHAN_PULSE:
+ config->ctiappset &= ~chan_bitmask;
+ reg_value = chan_bitmask;
+ reg_offset = CTIAPPPULSE;
+ break;
+
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ if ((err == 0) && cti_active(config))
+ cti_write_single_reg(drvdata, reg_offset, reg_value);
+ spin_unlock(&drvdata->spinlock);
+
+ return err;
+}
+
/** cti ect operations **/
int cti_enable(struct coresight_device *csdev)
{
diff --git a/drivers/hwtracing/coresight/coresight-cti.h b/drivers/hwtracing/coresight/coresight-cti.h
index 35eb77b276c4..f664b4bb4644 100644
--- a/drivers/hwtracing/coresight/coresight-cti.h
+++ b/drivers/hwtracing/coresight/coresight-cti.h
@@ -168,6 +168,30 @@ struct cti_drvdata {
void (*csdev_release)(struct device *dev);
};
+/*
+ * Channel operation types.
+ */
+enum cti_chan_op {
+ CTI_CHAN_ATTACH,
+ CTI_CHAN_DETACH,
+};
+
+enum cti_trig_dir {
+ CTI_TRIG_IN,
+ CTI_TRIG_OUT,
+};
+
+enum cti_chan_gate_op {
+ CTI_GATE_CHAN_ENABLE,
+ CTI_GATE_CHAN_DISABLE,
+};
+
+enum cti_chan_set_op {
+ CTI_CHAN_SET,
+ CTI_CHAN_CLR,
+ CTI_CHAN_PULSE,
+};
+
/* private cti driver fns & vars */
extern const struct attribute_group *coresight_cti_groups[];
int cti_add_default_connection(struct device *dev,
@@ -180,8 +204,16 @@ struct cti_trig_con *cti_allocate_trig_con(struct device *dev, int in_sigs,
int out_sigs);
int cti_enable(struct coresight_device *csdev);
int cti_disable(struct coresight_device *csdev);
+void cti_write_all_hw_regs(struct cti_drvdata *drvdata);
void cti_write_intack(struct device *dev, u32 ackval);
void cti_write_single_reg(struct cti_drvdata *drvdata, int offset, u32 value);
+int cti_channel_trig_op(struct device *dev, enum cti_chan_op op,
+ enum cti_trig_dir direction, u32 channel_idx,
+ u32 trigger_idx);
+int cti_channel_gate_op(struct device *dev, enum cti_chan_gate_op op,
+ u32 channel_idx);
+int cti_channel_setop(struct device *dev, enum cti_chan_set_op op,
+ u32 channel_idx);
struct coresight_platform_data *
coresight_cti_get_platform_data(struct device *dev);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.