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scsi: mpi3mr: Add target device related sysfs attributes

Browse source 
Add sysfs attributes for exposing target device details such as SAS
address, firmware device handle, and persistent ID for the
controller-attached devices and RAID volumes.

Link: https://lore.kernel.org/r/20220517115310.13062-3-sreekanth.reddy@broadcom.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sreekanth Reddy 2022-05-17 17:23:10 +05:30 committed by Martin K. Petersen
parent e51e76eddd
commit 9feb5c4c3f
3 changed files with 122 additions and 0 deletions
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1
drivers/scsi/mpi3mr/mpi3mr.h
View file

@ -1085,4 +1085,5 @@ int mpi3mr_pel_get_seqnum_post(struct mpi3mr_ioc *mrioc,
void mpi3mr_app_save_logdata(struct mpi3mr_ioc *mrioc, char *event_data,
u16 event_data_size);
extern const struct attribute_group *mpi3mr_host_groups[];
extern const struct attribute_group *mpi3mr_dev_groups[];
#endif /*MPI3MR_H_INCLUDED*/

120
drivers/scsi/mpi3mr/mpi3mr_app.c
View file

@ -1742,3 +1742,123 @@ const struct attribute_group *mpi3mr_host_groups[] = {
&mpi3mr_host_attr_group,
NULL,
};
/*
* SCSI Device attributes under sysfs
*/
/**
* sas_address_show - SysFS callback for dev SASaddress display
* @dev: class device
* @attr: Device attributes
* @buf: Buffer to copy
*
* Return: sysfs_emit() return after copying SAS address of the
* specific SAS/SATA end device.
*/
static ssize_t
sas_address_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
struct mpi3mr_sdev_priv_data *sdev_priv_data;
struct mpi3mr_stgt_priv_data *tgt_priv_data;
struct mpi3mr_tgt_dev *tgtdev;
sdev_priv_data = sdev->hostdata;
if (!sdev_priv_data)
return 0;
tgt_priv_data = sdev_priv_data->tgt_priv_data;
if (!tgt_priv_data)
return 0;
tgtdev = tgt_priv_data->tgt_dev;
if (!tgtdev || tgtdev->dev_type != MPI3_DEVICE_DEVFORM_SAS_SATA)
return 0;
return sysfs_emit(buf, "0x%016llx\n",
(unsigned long long)tgtdev->dev_spec.sas_sata_inf.sas_address);
}
static DEVICE_ATTR_RO(sas_address);
/**
* device_handle_show - SysFS callback for device handle display
* @dev: class device
* @attr: Device attributes
* @buf: Buffer to copy
*
* Return: sysfs_emit() return after copying firmware internal
* device handle of the specific device.
*/
static ssize_t
device_handle_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
struct mpi3mr_sdev_priv_data *sdev_priv_data;
struct mpi3mr_stgt_priv_data *tgt_priv_data;
struct mpi3mr_tgt_dev *tgtdev;
sdev_priv_data = sdev->hostdata;
if (!sdev_priv_data)
return 0;
tgt_priv_data = sdev_priv_data->tgt_priv_data;
if (!tgt_priv_data)
return 0;
tgtdev = tgt_priv_data->tgt_dev;
if (!tgtdev)
return 0;
return sysfs_emit(buf, "0x%04x\n", tgtdev->dev_handle);
}
static DEVICE_ATTR_RO(device_handle);
/**
* persistent_id_show - SysFS callback for persisten ID display
* @dev: class device
* @attr: Device attributes
* @buf: Buffer to copy
*
* Return: sysfs_emit() return after copying persistent ID of the
* of the specific device.
*/
static ssize_t
persistent_id_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
struct mpi3mr_sdev_priv_data *sdev_priv_data;
struct mpi3mr_stgt_priv_data *tgt_priv_data;
struct mpi3mr_tgt_dev *tgtdev;
sdev_priv_data = sdev->hostdata;
if (!sdev_priv_data)
return 0;
tgt_priv_data = sdev_priv_data->tgt_priv_data;
if (!tgt_priv_data)
return 0;
tgtdev = tgt_priv_data->tgt_dev;
if (!tgtdev)
return 0;
return sysfs_emit(buf, "%d\n", tgtdev->perst_id);
}
static DEVICE_ATTR_RO(persistent_id);
static struct attribute *mpi3mr_dev_attrs[] = {
&dev_attr_sas_address.attr,
&dev_attr_device_handle.attr,
&dev_attr_persistent_id.attr,
NULL,
};
static const struct attribute_group mpi3mr_dev_attr_group = {
.attrs = mpi3mr_dev_attrs
};
const struct attribute_group *mpi3mr_dev_groups[] = {
&mpi3mr_dev_attr_group,
NULL,
};

1
drivers/scsi/mpi3mr/mpi3mr_os.c
View file

@ -4147,6 +4147,7 @@ static struct scsi_host_template mpi3mr_driver_template = {
.track_queue_depth = 1,
.cmd_size = sizeof(struct scmd_priv),
.shost_groups = mpi3mr_host_groups,
.sdev_groups = mpi3mr_dev_groups,
};
/**