Commit 8eea9dd8 authored by Jason Yan's avatar Jason Yan Committed by Martin K. Petersen

scsi: libsas: make the event threshold configurable

Add a sysfs attr that LLDD can configure it for every host. We made an
example in hisi_sas. Other LLDDs using libsas can implement it if they
want.
Suggested-by: default avatarHannes Reinecke <hare@suse.com>
Signed-off-by: default avatarJason Yan <yanaijie@huawei.com>
CC: John Garry <john.garry@huawei.com>
CC: Johannes Thumshirn <jthumshirn@suse.de>
CC: Ewan Milne <emilne@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Tomas Henzl <thenzl@redhat.com>
CC: Dan Williams <dan.j.williams@intel.com>
Acked-by: John Garry <john.garry@huawei.com> #for hisi_sas part
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent f12486e0
...@@ -1672,6 +1672,11 @@ EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets); ...@@ -1672,6 +1672,11 @@ EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
struct scsi_transport_template *hisi_sas_stt; struct scsi_transport_template *hisi_sas_stt;
EXPORT_SYMBOL_GPL(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 = { static struct scsi_host_template _hisi_sas_sht = {
.module = THIS_MODULE, .module = THIS_MODULE,
.name = DRV_NAME, .name = DRV_NAME,
...@@ -1691,6 +1696,7 @@ static struct scsi_host_template _hisi_sas_sht = { ...@@ -1691,6 +1696,7 @@ static struct scsi_host_template _hisi_sas_sht = {
.eh_target_reset_handler = sas_eh_target_reset_handler, .eh_target_reset_handler = sas_eh_target_reset_handler,
.target_destroy = sas_target_destroy, .target_destroy = sas_target_destroy,
.ioctl = sas_ioctl, .ioctl = sas_ioctl,
.shost_attrs = host_attrs,
}; };
struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht; struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
EXPORT_SYMBOL_GPL(hisi_sas_sht); EXPORT_SYMBOL_GPL(hisi_sas_sht);
......
...@@ -538,6 +538,37 @@ static struct sas_function_template sft = { ...@@ -538,6 +538,37 @@ static struct sas_function_template sft = {
.smp_handler = sas_smp_handler, .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 * struct scsi_transport_template *
sas_domain_attach_transport(struct sas_domain_function_template *dft) sas_domain_attach_transport(struct sas_domain_function_template *dft)
{ {
......
...@@ -681,6 +681,7 @@ extern int sas_bios_param(struct scsi_device *, ...@@ -681,6 +681,7 @@ extern int sas_bios_param(struct scsi_device *,
sector_t capacity, int *hsc); sector_t capacity, int *hsc);
extern struct scsi_transport_template * extern struct scsi_transport_template *
sas_domain_attach_transport(struct sas_domain_function_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 *); int sas_discover_root_expander(struct domain_device *);
......
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