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Commit 6e5fe5b1 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Jeff Garzik
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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: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarJeff Garzik <jgarzik@pobox.com>
parent 686c4cbb

drivers/ata/ahci.h

+4 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/ata/libahci.c

+22 −0
Original line number Diff line number Diff line
@@ -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