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>From 8b079f9f7111a21251df110db81bd2540ec73058 Mon Sep 17 00:00:00 2001 From: Phillip Susi <psusi@faldara.(none)> Date: Wed, 10 Nov 2010 22:01:35 -0500 Subject: [PATCH] Export ahci eSATA attribute The AHCI standard defines a port bit that indicates that port is an eSATA external port. Detect and export this bit as a sysfs attribute named ahci_port_external. It is intended that this information be used by udisks to auto mount external eSATA drives when they are hot plugged. --- drivers/ata/ahci.h | 1 + drivers/ata/libahci.c | 16 ++++++++++++++++ include/linux/libata.h | 1 + 3 files changed, 18 insertions(+), 0 deletions(-) diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h index 329cbbb..421c523 100644 --- a/drivers/ata/ahci.h +++ b/drivers/ata/ahci.h @@ -172,6 +172,7 @@ enum { PORT_CMD_ALPE = (1 << 26), /* Aggressive Link PM enable */ PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */ PORT_CMD_FBSCP = (1 << 22), /* FBS Capable Port */ + PORT_CMD_ESP = (1 << 21), /* eSATA Port */ PORT_CMD_PMP = (1 << 17), /* PMP attached */ PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */ PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */ diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index ebc08d6..8e4a363 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -107,6 +107,8 @@ static ssize_t ahci_show_host_version(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t ahci_show_port_cmd(struct device *dev, struct device_attribute *attr, char *buf); +static ssize_t ahci_show_port_external(struct device *dev, + struct device_attribute *attr, char *buf); static ssize_t ahci_read_em_buffer(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t ahci_store_em_buffer(struct device *dev, @@ -117,6 +119,7 @@ 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); 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(ahci_port_external, S_IRUGO, ahci_show_port_external, NULL); static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO, ahci_read_em_buffer, ahci_store_em_buffer); @@ -128,6 +131,7 @@ struct device_attribute *ahci_shost_attrs[] = { &dev_attr_ahci_host_cap2, &dev_attr_ahci_host_version, &dev_attr_ahci_port_cmd, + &dev_attr_ahci_port_external, &dev_attr_em_buffer, NULL }; @@ -250,6 +254,15 @@ static ssize_t ahci_show_port_cmd(struct device *dev, return sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD)); } +static ssize_t ahci_show_port_external(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); + + return sprintf(buf, "%x\n", ap->flags & ATA_FLAG_EXTERN ? 1 : 0); +} + static ssize_t ahci_read_em_buffer(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1079,6 +1092,9 @@ static void ahci_port_init(struct device *dev, struct ata_port *ap, writel(tmp, port_mmio + PORT_IRQ_STAT); writel(1 << port_no, mmio + HOST_IRQ_STAT); + tmp = readl(port_mmio + PORT_CMD); + if (tmp & PORT_CMD_ESP) + ap->flags |= ATA_FLAG_EXTERN; } void ahci_init_controller(struct ata_host *host) diff --git a/include/linux/libata.h b/include/linux/libata.h index 15b77b8..1c5ffa7 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -203,6 +203,7 @@ enum { * management */ ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity * led */ + ATA_FLAG_EXTERN = (1 << 23), /* eSATA external port */ /* bits 24:31 of ap->flags are reserved for LLD specific flags */ -- 1.7.1