The file is read only.
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_enable
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows the status of performance monitor enablement
+ and it can be used to start/stop the monitor. When the monitor
+ is stopped, the performance data collected is also cleared.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_chunk_size
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file tells the monitor to focus on requests transferring
+ data of specific chunk size (in Bytes). 0 means any chunk size.
+ It can only be changed when monitor is disabled.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_sectors
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows how many sectors (in 512 Bytes) have been
+ sent from device to host after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_busy
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows how long (in micro seconds) has been spent
+ sending data from device to host after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_nr_requests
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows how many read requests have been sent after
+ monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_max
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows the maximum latency (in micro seconds) of
+ read requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_min
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows the minimum latency (in micro seconds) of
+ read requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_avg
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows the average latency (in micro seconds) of
+ read requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_sum
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows the total latency (in micro seconds) of
+ read requests sent after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_sectors
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows how many sectors (in 512 Bytes) have been sent
+ from host to device after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_busy
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows how long (in micro seconds) has been spent
+ sending data from host to device after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_nr_requests
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows how many write requests have been sent after
+ monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_max
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows the maximum latency (in micro seconds) of write
+ requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_min
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows the minimum latency (in micro seconds) of write
+ requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_avg
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows the average latency (in micro seconds) of write
+ requests after monitor gets started.
+
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_sum
+Date: January 2021
+Contact: Can Guo <cang@codeaurora.org>
+Description: This file shows the total latency (in micro seconds) of write
+ requests after monitor gets started.
+
+ The file is read only.
+
What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_presv_us_en
Date: June 2020
Contact: Asutosh Das <asutoshd@codeaurora.org>
.attrs = ufs_sysfs_ufshcd_attrs,
};
+static ssize_t monitor_enable_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%d\n", hba->monitor.enabled);
+}
+
+static ssize_t monitor_enable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+ unsigned long value, flags;
+
+ if (kstrtoul(buf, 0, &value))
+ return -EINVAL;
+
+ value = !!value;
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ if (value == hba->monitor.enabled)
+ goto out_unlock;
+
+ if (!value) {
+ memset(&hba->monitor, 0, sizeof(hba->monitor));
+ } else {
+ hba->monitor.enabled = true;
+ hba->monitor.enabled_ts = ktime_get();
+ }
+
+out_unlock:
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ return count;
+}
+
+static ssize_t monitor_chunk_size_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%lu\n", hba->monitor.chunk_size);
+}
+
+static ssize_t monitor_chunk_size_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+ unsigned long value, flags;
+
+ if (kstrtoul(buf, 0, &value))
+ return -EINVAL;
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ /* Only allow chunk size change when monitor is disabled */
+ if (!hba->monitor.enabled)
+ hba->monitor.chunk_size = value;
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ return count;
+}
+
+static ssize_t read_total_sectors_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%lu\n", hba->monitor.nr_sec_rw[READ]);
+}
+
+static ssize_t read_total_busy_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%llu\n",
+ ktime_to_us(hba->monitor.total_busy[READ]));
+}
+
+static ssize_t read_nr_requests_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%lu\n", hba->monitor.nr_req[READ]);
+}
+
+static ssize_t read_req_latency_avg_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+ struct ufs_hba_monitor *m = &hba->monitor;
+
+ return sysfs_emit(buf, "%llu\n", div_u64(ktime_to_us(m->lat_sum[READ]),
+ m->nr_req[READ]));
+}
+
+static ssize_t read_req_latency_max_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%llu\n",
+ ktime_to_us(hba->monitor.lat_max[READ]));
+}
+
+static ssize_t read_req_latency_min_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%llu\n",
+ ktime_to_us(hba->monitor.lat_min[READ]));
+}
+
+static ssize_t read_req_latency_sum_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%llu\n",
+ ktime_to_us(hba->monitor.lat_sum[READ]));
+}
+
+static ssize_t write_total_sectors_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%lu\n", hba->monitor.nr_sec_rw[WRITE]);
+}
+
+static ssize_t write_total_busy_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%llu\n",
+ ktime_to_us(hba->monitor.total_busy[WRITE]));
+}
+
+static ssize_t write_nr_requests_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%lu\n", hba->monitor.nr_req[WRITE]);
+}
+
+static ssize_t write_req_latency_avg_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+ struct ufs_hba_monitor *m = &hba->monitor;
+
+ return sysfs_emit(buf, "%llu\n", div_u64(ktime_to_us(m->lat_sum[WRITE]),
+ m->nr_req[WRITE]));
+}
+
+static ssize_t write_req_latency_max_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%llu\n",
+ ktime_to_us(hba->monitor.lat_max[WRITE]));
+}
+
+static ssize_t write_req_latency_min_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%llu\n",
+ ktime_to_us(hba->monitor.lat_min[WRITE]));
+}
+
+static ssize_t write_req_latency_sum_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%llu\n",
+ ktime_to_us(hba->monitor.lat_sum[WRITE]));
+}
+
+static DEVICE_ATTR_RW(monitor_enable);
+static DEVICE_ATTR_RW(monitor_chunk_size);
+static DEVICE_ATTR_RO(read_total_sectors);
+static DEVICE_ATTR_RO(read_total_busy);
+static DEVICE_ATTR_RO(read_nr_requests);
+static DEVICE_ATTR_RO(read_req_latency_avg);
+static DEVICE_ATTR_RO(read_req_latency_max);
+static DEVICE_ATTR_RO(read_req_latency_min);
+static DEVICE_ATTR_RO(read_req_latency_sum);
+static DEVICE_ATTR_RO(write_total_sectors);
+static DEVICE_ATTR_RO(write_total_busy);
+static DEVICE_ATTR_RO(write_nr_requests);
+static DEVICE_ATTR_RO(write_req_latency_avg);
+static DEVICE_ATTR_RO(write_req_latency_max);
+static DEVICE_ATTR_RO(write_req_latency_min);
+static DEVICE_ATTR_RO(write_req_latency_sum);
+
+static struct attribute *ufs_sysfs_monitor_attrs[] = {
+ &dev_attr_monitor_enable.attr,
+ &dev_attr_monitor_chunk_size.attr,
+ &dev_attr_read_total_sectors.attr,
+ &dev_attr_read_total_busy.attr,
+ &dev_attr_read_nr_requests.attr,
+ &dev_attr_read_req_latency_avg.attr,
+ &dev_attr_read_req_latency_max.attr,
+ &dev_attr_read_req_latency_min.attr,
+ &dev_attr_read_req_latency_sum.attr,
+ &dev_attr_write_total_sectors.attr,
+ &dev_attr_write_total_busy.attr,
+ &dev_attr_write_nr_requests.attr,
+ &dev_attr_write_req_latency_avg.attr,
+ &dev_attr_write_req_latency_max.attr,
+ &dev_attr_write_req_latency_min.attr,
+ &dev_attr_write_req_latency_sum.attr,
+ NULL
+};
+
+static const struct attribute_group ufs_sysfs_monitor_group = {
+ .name = "monitor",
+ .attrs = ufs_sysfs_monitor_attrs,
+};
+
static ssize_t ufs_sysfs_read_desc_param(struct ufs_hba *hba,
enum desc_idn desc_id,
u8 desc_index,
static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_default_group,
+ &ufs_sysfs_monitor_group,
&ufs_sysfs_device_descriptor_group,
&ufs_sysfs_interconnect_descriptor_group,
&ufs_sysfs_geometry_descriptor_group,
scaling->is_busy_started = false;
}
}
+
+static inline int ufshcd_monitor_opcode2dir(u8 opcode)
+{
+ if (opcode == READ_6 || opcode == READ_10 || opcode == READ_16)
+ return READ;
+ else if (opcode == WRITE_6 || opcode == WRITE_10 || opcode == WRITE_16)
+ return WRITE;
+ else
+ return -EINVAL;
+}
+
+static inline bool ufshcd_should_inform_monitor(struct ufs_hba *hba,
+ struct ufshcd_lrb *lrbp)
+{
+ struct ufs_hba_monitor *m = &hba->monitor;
+
+ return (m->enabled && lrbp && lrbp->cmd &&
+ (!m->chunk_size || m->chunk_size == lrbp->cmd->sdb.length) &&
+ ktime_before(hba->monitor.enabled_ts, lrbp->issue_time_stamp));
+}
+
+static void ufshcd_start_monitor(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+{
+ int dir = ufshcd_monitor_opcode2dir(*lrbp->cmd->cmnd);
+
+ if (dir >= 0 && hba->monitor.nr_queued[dir]++ == 0)
+ hba->monitor.busy_start_ts[dir] = ktime_get();
+}
+
+static void ufshcd_update_monitor(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+{
+ int dir = ufshcd_monitor_opcode2dir(*lrbp->cmd->cmnd);
+
+ if (dir >= 0 && hba->monitor.nr_queued[dir] > 0) {
+ struct request *req = lrbp->cmd->request;
+ struct ufs_hba_monitor *m = &hba->monitor;
+ ktime_t now, inc, lat;
+
+ now = lrbp->compl_time_stamp;
+ inc = ktime_sub(now, m->busy_start_ts[dir]);
+ m->total_busy[dir] = ktime_add(m->total_busy[dir], inc);
+ m->nr_sec_rw[dir] += blk_rq_sectors(req);
+
+ /* Update latencies */
+ m->nr_req[dir]++;
+ lat = ktime_sub(now, lrbp->issue_time_stamp);
+ m->lat_sum[dir] += lat;
+ if (m->lat_max[dir] < lat || !m->lat_max[dir])
+ m->lat_max[dir] = lat;
+ if (m->lat_min[dir] > lat || !m->lat_min[dir])
+ m->lat_min[dir] = lat;
+
+ m->nr_queued[dir]--;
+ /* Push forward the busy start of monitor */
+ m->busy_start_ts[dir] = now;
+ }
+}
+
/**
* ufshcd_send_command - Send SCSI or device management commands
* @hba: per adapter instance
ufshcd_add_command_trace(hba, task_tag, UFS_CMD_SEND);
ufshcd_clk_scaling_start_busy(hba);
__set_bit(task_tag, &hba->outstanding_reqs);
+ if (unlikely(ufshcd_should_inform_monitor(hba, lrbp)))
+ ufshcd_start_monitor(hba, lrbp);
ufshcd_writel(hba, 1 << task_tag, REG_UTP_TRANSFER_REQ_DOOR_BELL);
/* Make sure that doorbell is committed immediately */
wmb();
lrbp->compl_time_stamp = ktime_get();
cmd = lrbp->cmd;
if (cmd) {
+ if (unlikely(ufshcd_should_inform_monitor(hba, lrbp)))
+ ufshcd_update_monitor(hba, lrbp);
ufshcd_add_command_trace(hba, index, UFS_CMD_COMP);
result = ufshcd_transfer_rsp_status(hba, lrbp);
scsi_dma_unmap(cmd);
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