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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>
This commit is contained in:
Hannes Reinecke 2011-03-04 09:54:52 +01:00 committed by Jeff Garzik
parent 686c4cbb10
commit 6e5fe5b12c
2 changed files with 26 additions and 0 deletions
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4
drivers/ata/ahci.h
View File

@ -229,6 +229,10 @@ enum {
EM_CTL_ALHD = (1 << 26), /* Activity LED */
EM_CTL_XMT = (1 << 25), /* Transmit Only */
EM_CTL_SMB = (1 << 24), /* Single Message Buffer */
EM_CTL_SGPIO = (1 << 19), /* SGPIO messages supported */
EM_CTL_SES = (1 << 18), /* SES-2 messages supported */
EM_CTL_SAFTE = (1 << 17), /* SAF-TE messages supported */
EM_CTL_LED = (1 << 16), /* LED messages supported */
/* em message type */
EM_MSG_TYPE_LED = (1 << 0), /* LED */

22
drivers/ata/libahci.c
View File

@ -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