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-rw-r--r--drivers/scsi/hisi_sas/hisi_sas_main.c6
-rw-r--r--drivers/scsi/libsas/sas_init.c31
-rw-r--r--include/scsi/libsas.h1
3 files changed, 38 insertions, 0 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 04e1172b0bc5..819b1d0ded89 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1672,6 +1672,11 @@ EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
struct scsi_transport_template *hisi_sas_stt;
EXPORT_SYMBOL_GPL(hisi_sas_stt);
+struct device_attribute *host_attrs[] = {
+ &dev_attr_phy_event_threshold,
+ NULL,
+};
+
static struct scsi_host_template _hisi_sas_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
@@ -1691,6 +1696,7 @@ static struct scsi_host_template _hisi_sas_sht = {
.eh_target_reset_handler = sas_eh_target_reset_handler,
.target_destroy = sas_target_destroy,
.ioctl = sas_ioctl,
+ .shost_attrs = host_attrs,
};
struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
EXPORT_SYMBOL_GPL(hisi_sas_sht);
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index 22bfc025ae81..afd928bf903e 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -538,6 +538,37 @@ static struct sas_function_template sft = {
.smp_handler = sas_smp_handler,
};
+static inline ssize_t phy_event_threshold_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", sha->event_thres);
+}
+
+static inline ssize_t phy_event_threshold_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
+
+ sha->event_thres = simple_strtol(buf, NULL, 10);
+
+ /* threshold cannot be set too small */
+ if (sha->event_thres < 32)
+ sha->event_thres = 32;
+
+ return count;
+}
+
+DEVICE_ATTR(phy_event_threshold,
+ S_IRUGO|S_IWUSR,
+ phy_event_threshold_show,
+ phy_event_threshold_store);
+EXPORT_SYMBOL_GPL(dev_attr_phy_event_threshold);
+
struct scsi_transport_template *
sas_domain_attach_transport(struct sas_domain_function_template *dft)
{
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index de8f043475c2..3769615d4ce9 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -681,6 +681,7 @@ extern int sas_bios_param(struct scsi_device *,
sector_t capacity, int *hsc);
extern struct scsi_transport_template *
sas_domain_attach_transport(struct sas_domain_function_template *);
+extern struct device_attribute dev_attr_phy_event_threshold;
int sas_discover_root_expander(struct domain_device *);