diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2015-05-04 21:54:19 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2015-05-05 09:30:18 -0400 |
| commit | f303074160d3401970ccae082014e1ee5a9a52c5 (patch) | |
| tree | a1ab040aa04feaa3c4763779fa07b050a6434528 /drivers/ata/libata-transport.c | |
| parent | d7b16e4f6283c6ec52b411aa6deb02ca4d030d20 (diff) | |
libata: Expose TRIM capability in sysfs
Create a sysfs "trim" attribute for each ata_device that displays
whether DSM TRIM is "unsupported", "unqueued", "forced_unqueued"
(blacklisted) or "queued".
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/libata-transport.c')
| -rw-r--r-- | drivers/ata/libata-transport.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c index 3227b7c8a05f..d6c37bcd416d 100644 --- a/drivers/ata/libata-transport.c +++ b/drivers/ata/libata-transport.c @@ -560,6 +560,27 @@ show_ata_dev_gscr(struct device *dev, static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); +static ssize_t +show_ata_dev_trim(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ata_device *ata_dev = transport_class_to_dev(dev); + unsigned char *mode; + + if (!ata_id_has_trim(ata_dev->id)) + mode = "unsupported"; + else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) + mode = "forced_unqueued"; + else if (ata_fpdma_dsm_supported(ata_dev)) + mode = "queued"; + else + mode = "unqueued"; + + return snprintf(buf, 20, "%s\n", mode); +} + +static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL); + static DECLARE_TRANSPORT_CLASS(ata_dev_class, "ata_device", NULL, NULL, NULL); @@ -733,6 +754,7 @@ struct scsi_transport_template *ata_attach_transport(void) SETUP_DEV_ATTRIBUTE(ering); SETUP_DEV_ATTRIBUTE(id); SETUP_DEV_ATTRIBUTE(gscr); + SETUP_DEV_ATTRIBUTE(trim); BUG_ON(count > ATA_DEV_ATTRS); i->dev_attrs[count] = NULL; |