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| author | Hannes Reinecke <hare@suse.de> | 2011-03-04 09:54:52 +0100 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2011-04-24 17:31:31 +0200 |
| commit | 6e5fe5b12cfcd9ed4303c9a4f4a22a694104d28f (patch) | |
| tree | 96ccfacbf812e6ddbad8e3c1f90b466f3a3458e2 /drivers/ata/libahci.c | |
| parent | Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafa... (diff) | |
| download | linux-6e5fe5b12cfcd9ed4303c9a4f4a22a694104d28f.tar.xz linux-6e5fe5b12cfcd9ed4303c9a4f4a22a694104d28f.zip | |
ahci: EM supported message type sysfs attribute
This patch adds an sysfs attribute 'em_message_supported' to the
ahci host device which prints out the supported enclosure management
message types.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/ata/libahci.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index 26d452339e98..633159b5152a 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -109,6 +109,8 @@ static ssize_t ahci_read_em_buffer(struct device *dev, static ssize_t ahci_store_em_buffer(struct device *dev, struct device_attribute *attr, const char *buf, size_t size); +static ssize_t ahci_show_em_supported(struct device *dev, + struct device_attribute *attr, char *buf); static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL); static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL); @@ -116,6 +118,7 @@ static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL); static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL); static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO, ahci_read_em_buffer, ahci_store_em_buffer); +static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL); struct device_attribute *ahci_shost_attrs[] = { &dev_attr_link_power_management_policy, @@ -126,6 +129,7 @@ struct device_attribute *ahci_shost_attrs[] = { &dev_attr_ahci_host_version, &dev_attr_ahci_port_cmd, &dev_attr_em_buffer, + &dev_attr_em_message_supported, NULL }; EXPORT_SYMBOL_GPL(ahci_shost_attrs); @@ -343,6 +347,24 @@ static ssize_t ahci_store_em_buffer(struct device *dev, return size; } +static ssize_t ahci_show_em_supported(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ata_port *ap = ata_shost_to_port(shost); + struct ahci_host_priv *hpriv = ap->host->private_data; + void __iomem *mmio = hpriv->mmio; + u32 em_ctl; + + em_ctl = readl(mmio + HOST_EM_CTL); + + return sprintf(buf, "%s%s%s%s\n", + em_ctl & EM_CTL_LED ? "led " : "", + em_ctl & EM_CTL_SAFTE ? "saf-te " : "", + em_ctl & EM_CTL_SES ? "ses-2 " : "", + em_ctl & EM_CTL_SGPIO ? "sgpio " : ""); +} + /** * ahci_save_initial_config - Save and fixup initial config values * @dev: target AHCI device |