1 files changed, 342 insertions, 1 deletions

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 343b0b36ed22..aa3d6277581d 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -32,6 +32,7 @@
 
 #include "lpfc_hw.h"
 #include "lpfc_sli.h"
+#include "lpfc_nl.h"
 #include "lpfc_disc.h"
 #include "lpfc_scsi.h"
 #include "lpfc.h"
@@ -2183,6 +2184,335 @@ lpfc_param_store(topology)
 static DEVICE_ATTR(lpfc_topology, S_IRUGO | S_IWUSR,
 		lpfc_topology_show, lpfc_topology_store);
 
+
+/**
+ * lpfc_stat_data_ctrl_store: write call back for lpfc_stat_data_ctrl
+ *  sysfs file.
+ * @dev: Pointer to class device.
+ * @buf: Data buffer.
+ * @count: Size of the data buffer.
+ *
+ * This function get called when an user write to the lpfc_stat_data_ctrl
+ * sysfs file. This function parse the command written to the sysfs file
+ * and take appropriate action. These commands are used for controlling
+ * driver statistical data collection.
+ * Following are the command this function handles.
+ *
+ *    setbucket <bucket_type> <base> <step>
+ *			       = Set the latency buckets.
+ *    destroybucket            = destroy all the buckets.
+ *    start                    = start data collection
+ *    stop                     = stop data collection
+ *    reset                    = reset the collected data
+ **/
+static ssize_t
+lpfc_stat_data_ctrl_store(struct device *dev, struct device_attribute *attr,
+			  const char *buf, size_t count)
+{
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+	struct lpfc_hba   *phba = vport->phba;
+#define LPFC_MAX_DATA_CTRL_LEN 1024
+	static char bucket_data[LPFC_MAX_DATA_CTRL_LEN];
+	unsigned long i;
+	char *str_ptr, *token;
+	struct lpfc_vport **vports;
+	struct Scsi_Host *v_shost;
+	char *bucket_type_str, *base_str, *step_str;
+	unsigned long base, step, bucket_type;
+
+	if (!strncmp(buf, "setbucket", strlen("setbucket"))) {
+		if (strlen(buf) > LPFC_MAX_DATA_CTRL_LEN)
+			return -EINVAL;
+
+		strcpy(bucket_data, buf);
+		str_ptr = &bucket_data[0];
+		/* Ignore this token - this is command token */
+		token = strsep(&str_ptr, "\t ");
+		if (!token)
+			return -EINVAL;
+
+		bucket_type_str = strsep(&str_ptr, "\t ");
+		if (!bucket_type_str)
+			return -EINVAL;
+
+		if (!strncmp(bucket_type_str, "linear", strlen("linear")))
+			bucket_type = LPFC_LINEAR_BUCKET;
+		else if (!strncmp(bucket_type_str, "power2", strlen("power2")))
+			bucket_type = LPFC_POWER2_BUCKET;
+		else
+			return -EINVAL;
+
+		base_str = strsep(&str_ptr, "\t ");
+		if (!base_str)
+			return -EINVAL;
+		base = simple_strtoul(base_str, NULL, 0);
+
+		step_str = strsep(&str_ptr, "\t ");
+		if (!step_str)
+			return -EINVAL;
+		step = simple_strtoul(step_str, NULL, 0);
+		if (!step)
+			return -EINVAL;
+
+		/* Block the data collection for every vport */
+		vports = lpfc_create_vport_work_array(phba);
+		if (vports == NULL)
+			return -ENOMEM;
+
+		for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
+			v_shost = lpfc_shost_from_vport(vports[i]);
+			spin_lock_irq(v_shost->host_lock);
+			/* Block and reset data collection */
+			vports[i]->stat_data_blocked = 1;
+			if (vports[i]->stat_data_enabled)
+				lpfc_vport_reset_stat_data(vports[i]);
+			spin_unlock_irq(v_shost->host_lock);
+		}
+
+		/* Set the bucket attributes */
+		phba->bucket_type = bucket_type;
+		phba->bucket_base = base;
+		phba->bucket_step = step;
+
+		for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
+			v_shost = lpfc_shost_from_vport(vports[i]);
+
+			/* Unblock data collection */
+			spin_lock_irq(v_shost->host_lock);
+			vports[i]->stat_data_blocked = 0;
+			spin_unlock_irq(v_shost->host_lock);
+		}
+		lpfc_destroy_vport_work_array(phba, vports);
+		return strlen(buf);
+	}
+
+	if (!strncmp(buf, "destroybucket", strlen("destroybucket"))) {
+		vports = lpfc_create_vport_work_array(phba);
+		if (vports == NULL)
+			return -ENOMEM;
+
+		for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
+			v_shost = lpfc_shost_from_vport(vports[i]);
+			spin_lock_irq(shost->host_lock);
+			vports[i]->stat_data_blocked = 1;
+			lpfc_free_bucket(vport);
+			vport->stat_data_enabled = 0;
+			vports[i]->stat_data_blocked = 0;
+			spin_unlock_irq(shost->host_lock);
+		}
+		lpfc_destroy_vport_work_array(phba, vports);
+		phba->bucket_type = LPFC_NO_BUCKET;
+		phba->bucket_base = 0;
+		phba->bucket_step = 0;
+		return strlen(buf);
+	}
+
+	if (!strncmp(buf, "start", strlen("start"))) {
+		/* If no buckets configured return error */
+		if (phba->bucket_type == LPFC_NO_BUCKET)
+			return -EINVAL;
+		spin_lock_irq(shost->host_lock);
+		if (vport->stat_data_enabled) {
+			spin_unlock_irq(shost->host_lock);
+			return strlen(buf);
+		}
+		lpfc_alloc_bucket(vport);
+		vport->stat_data_enabled = 1;
+		spin_unlock_irq(shost->host_lock);
+		return strlen(buf);
+	}
+
+	if (!strncmp(buf, "stop", strlen("stop"))) {
+		spin_lock_irq(shost->host_lock);
+		if (vport->stat_data_enabled == 0) {
+			spin_unlock_irq(shost->host_lock);
+			return strlen(buf);
+		}
+		lpfc_free_bucket(vport);
+		vport->stat_data_enabled = 0;
+		spin_unlock_irq(shost->host_lock);
+		return strlen(buf);
+	}
+
+	if (!strncmp(buf, "reset", strlen("reset"))) {
+		if ((phba->bucket_type == LPFC_NO_BUCKET)
+			|| !vport->stat_data_enabled)
+			return strlen(buf);
+		spin_lock_irq(shost->host_lock);
+		vport->stat_data_blocked = 1;
+		lpfc_vport_reset_stat_data(vport);
+		vport->stat_data_blocked = 0;
+		spin_unlock_irq(shost->host_lock);
+		return strlen(buf);
+	}
+	return -EINVAL;
+}
+
+
+/**
+ * lpfc_stat_data_ctrl_show: Read callback function for
+ *   lpfc_stat_data_ctrl sysfs file.
+ * @dev: Pointer to class device object.
+ * @buf: Data buffer.
+ *
+ * This function is the read call back function for
+ * lpfc_stat_data_ctrl sysfs file. This function report the
+ * current statistical data collection state.
+ **/
+static ssize_t
+lpfc_stat_data_ctrl_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+	struct lpfc_hba   *phba = vport->phba;
+	int index = 0;
+	int i;
+	char *bucket_type;
+	unsigned long bucket_value;
+
+	switch (phba->bucket_type) {
+	case LPFC_LINEAR_BUCKET:
+		bucket_type = "linear";
+		break;
+	case LPFC_POWER2_BUCKET:
+		bucket_type = "power2";
+		break;
+	default:
+		bucket_type = "No Bucket";
+		break;
+	}
+
+	sprintf(&buf[index], "Statistical Data enabled :%d, "
+		"blocked :%d, Bucket type :%s, Bucket base :%d,"
+		" Bucket step :%d\nLatency Ranges :",
+		vport->stat_data_enabled, vport->stat_data_blocked,
+		bucket_type, phba->bucket_base, phba->bucket_step);
+	index = strlen(buf);
+	if (phba->bucket_type != LPFC_NO_BUCKET) {
+		for (i = 0; i < LPFC_MAX_BUCKET_COUNT; i++) {
+			if (phba->bucket_type == LPFC_LINEAR_BUCKET)
+				bucket_value = phba->bucket_base +
+					phba->bucket_step * i;
+			else
+				bucket_value = phba->bucket_base +
+				(1 << i) * phba->bucket_step;
+
+			if (index + 10 > PAGE_SIZE)
+				break;
+			sprintf(&buf[index], "%08ld ", bucket_value);
+			index = strlen(buf);
+		}
+	}
+	sprintf(&buf[index], "\n");
+	return strlen(buf);
+}
+
+/*
+ * Sysfs attribute to control the statistical data collection.
+ */
+static DEVICE_ATTR(lpfc_stat_data_ctrl, S_IRUGO | S_IWUSR,
+		   lpfc_stat_data_ctrl_show, lpfc_stat_data_ctrl_store);
+
+/*
+ * lpfc_drvr_stat_data: sysfs attr to get driver statistical data.
+ */
+
+/*
+ * Each Bucket takes 11 characters and 1 new line + 17 bytes WWN
+ * for each target.
+ */
+#define STAT_DATA_SIZE_PER_TARGET(NUM_BUCKETS) ((NUM_BUCKETS) * 11 + 18)
+#define MAX_STAT_DATA_SIZE_PER_TARGET \
+	STAT_DATA_SIZE_PER_TARGET(LPFC_MAX_BUCKET_COUNT)
+
+
+/**
+ * sysfs_drvr_stat_data_read: Read callback function for lpfc_drvr_stat_data
+ *  sysfs attribute.
+ * @kobj: Pointer to the kernel object
+ * @bin_attr: Attribute object
+ * @buff: Buffer pointer
+ * @off: File offset
+ * @count: Buffer size
+ *
+ * This function is the read call back function for lpfc_drvr_stat_data
+ * sysfs file. This function export the statistical data to user
+ * applications.
+ **/
+static ssize_t
+sysfs_drvr_stat_data_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+		char *buf, loff_t off, size_t count)
+{
+	struct device *dev = container_of(kobj, struct device,
+		kobj);
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+	struct lpfc_hba   *phba = vport->phba;
+	int i = 0, index = 0;
+	unsigned long nport_index;
+	struct lpfc_nodelist *ndlp = NULL;
+	nport_index = (unsigned long)off /
+		MAX_STAT_DATA_SIZE_PER_TARGET;
+
+	if (!vport->stat_data_enabled || vport->stat_data_blocked
+		|| (phba->bucket_type == LPFC_NO_BUCKET))
+		return 0;
+
+	spin_lock_irq(shost->host_lock);
+	list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
+		if (!NLP_CHK_NODE_ACT(ndlp) || !ndlp->lat_data)
+			continue;
+
+		if (nport_index > 0) {
+			nport_index--;
+			continue;
+		}
+
+		if ((index + MAX_STAT_DATA_SIZE_PER_TARGET)
+			> count)
+			break;
+
+		if (!ndlp->lat_data)
+			continue;
+
+		/* Print the WWN */
+		sprintf(&buf[index], "%02x%02x%02x%02x%02x%02x%02x%02x:",
+			ndlp->nlp_portname.u.wwn[0],
+			ndlp->nlp_portname.u.wwn[1],
+			ndlp->nlp_portname.u.wwn[2],
+			ndlp->nlp_portname.u.wwn[3],
+			ndlp->nlp_portname.u.wwn[4],
+			ndlp->nlp_portname.u.wwn[5],
+			ndlp->nlp_portname.u.wwn[6],
+			ndlp->nlp_portname.u.wwn[7]);
+
+		index = strlen(buf);
+
+		for (i = 0; i < LPFC_MAX_BUCKET_COUNT; i++) {
+			sprintf(&buf[index], "%010u,",
+				ndlp->lat_data[i].cmd_count);
+			index = strlen(buf);
+		}
+		sprintf(&buf[index], "\n");
+		index = strlen(buf);
+	}
+	spin_unlock_irq(shost->host_lock);
+	return index;
+}
+
+static struct bin_attribute sysfs_drvr_stat_data_attr = {
+	.attr = {
+		.name = "lpfc_drvr_stat_data",
+		.mode = S_IRUSR,
+		.owner = THIS_MODULE,
+	},
+	.size = LPFC_MAX_TARGET * MAX_STAT_DATA_SIZE_PER_TARGET,
+	.read = sysfs_drvr_stat_data_read,
+	.write = NULL,
+};
+
 /*
 # lpfc_link_speed: Link speed selection for initializing the Fibre Channel
 # connection.
@@ -2502,6 +2832,7 @@ struct device_attribute *lpfc_hba_attrs[] = {
 	&dev_attr_lpfc_enable_hba_heartbeat,
 	&dev_attr_lpfc_sg_seg_cnt,
 	&dev_attr_lpfc_max_scsicmpl_time,
+	&dev_attr_lpfc_stat_data_ctrl,
 	NULL,
 };
 
@@ -2524,6 +2855,8 @@ struct device_attribute *lpfc_vport_attrs[] = {
 	&dev_attr_nport_evt_cnt,
 	&dev_attr_npiv_info,
 	&dev_attr_lpfc_enable_da_id,
+	&dev_attr_lpfc_max_scsicmpl_time,
+	&dev_attr_lpfc_stat_data_ctrl,
 	NULL,
 };
 
@@ -2958,7 +3291,14 @@ lpfc_alloc_sysfs_attr(struct lpfc_vport *vport)
 	if (error)
 		goto out_remove_ctlreg_attr;
 
+	error = sysfs_create_bin_file(&shost->shost_dev.kobj,
+				      &sysfs_drvr_stat_data_attr);
+	if (error)
+		goto out_remove_mbox_attr;
+
 	return 0;
+out_remove_mbox_attr:
+	sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_mbox_attr);
 out_remove_ctlreg_attr:
 	sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_ctlreg_attr);
 out:
@@ -2973,7 +3313,8 @@ void
 lpfc_free_sysfs_attr(struct lpfc_vport *vport)
 {
 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
-
+	sysfs_remove_bin_file(&shost->shost_dev.kobj,
+		&sysfs_drvr_stat_data_attr);
 	sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_mbox_attr);
 	sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_ctlreg_attr);
 }