Add Enclosure Management support to libata and ahci.
This patch adds support for the LED protocol, as defined in the AHCI spec.
It adds a generic em_message and em_type sysfs entry per host. It also adds
a sw_activity field per existing drive.
The em_message field can be used by the driver to take enclosure management
commands from userspace. In the case of the LED protocol, writes and reads
from em_message correspond to the LED message format as defined in the
AHCI spec.
em_message type is a read only file that displays the current enclosure
management protocol that is used by the driver.
sw_activity is used by drivers which support software controlled activity LEDs.
It has the following valid values:
0 OFF - the LED is not activated on activity
1 BLINK_ON - the LED blinks on every 10ms when activity is detected.
2 BLINK_OFF - the LED is on when idle, and blinks off every 10ms when
activity is detected.
It's important to note that the user must turn sw_activity OFF it they wish
to control the activity LED via the em_message file.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
---
I'm concerned about my locking, cause I usually suck at figuring out when I
need it. If you could review that really carefully, I'd appreciate it.
Thanks!
drivers/ata/ahci.c | 321 +++++++++++++++++++++++++++++++++++++++++++++-
drivers/ata/libata-scsi.c | 77 +++++++++++
include/linux/libata.h | 22 +++
3 files changed, 418 insertions(+), 2 deletions(-)
Index: linux-2.6/drivers/ata/ahci.c
===================================================================
--- linux-2.6.orig/drivers/ata/ahci.c 2007-12-19 16:10:50.000000000 -0800
+++ linux-2.6/drivers/ata/ahci.c 2008-01-15 16:34:30.000000000 -0800
@@ -52,6 +52,12 @@
static int ahci_enable_alpm(struct ata_port *ap,
enum link_pm policy);
static void ahci_disable_alpm(struct ata_port *ap);
+static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
+static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
+ size_t size);
+static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
+ ssize_t size);
+#define MAX_SLOTS 8
enum {
AHCI_PCI_BAR = 5,
@@ -92,6 +98,8 @@ enum {
HOST_IRQ_STAT = 0x08, /* interrupt status */
HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
+ HOST_EM_LOC = 0x1c, /* Enclosure Management location */
+ HOST_EM_CTL = 0x20, /* Enclosure Management Control */
/* HOST_CTL bits */
HOST_RESET = (1 << 0), /* reset controller; self-clear */
@@ -99,6 +107,7 @@ enum {
HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
/* HOST_CAP bits */
+ HOST_CAP_EMS = (1 << 6), /* Enclosure Management support */
HOST_CAP_SSC = (1 << 14), /* Slumber capable */
HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */
HOST_CAP_CLO = (1 << 24), /* Command List Override support */
@@ -195,6 +204,11 @@ enum {
AHCI_LFLAG_COMMON = ATA_LFLAG_SKIP_D2H_BSY,
ICH_MAP = 0x90, /* ICH MAP register */
+
+ /* em_ctl bits */
+ EM_CTL_RST = (1 << 9), /* Reset */
+ EM_CTL_TM = (1 << 8), /* Transmit Message */
+ EM_CTL_ALHD = (1 << 26), /* Activity LED */
};
struct ahci_cmd_hdr {
@@ -212,12 +226,21 @@ struct ahci_sg {
u32 flags_size;
};
+struct ahci_em_priv {
+ enum sw_activity blink_policy;
+ struct timer_list timer;
+ unsigned long saved_activity;
+ unsigned long activity;
+ unsigned long led_state;
+};
+
struct ahci_host_priv {
unsigned int flags; /* AHCI_HFLAG_* */
u32 cap; /* cap to use */
u32 port_map; /* port map to use */
u32 saved_cap; /* saved initial cap */
u32 saved_port_map; /* saved initial port_map */
+ u32 em_loc; /* enclosure management location */
};
struct ahci_port_priv {
@@ -233,6 +256,8 @@ struct ahci_port_priv {
unsigned int ncq_saw_dmas:1;
unsigned int ncq_saw_sdb:1;
u32 intr_mask; /* interrupts to enable */
+ struct ahci_em_priv em_priv[MAX_SLOTS];/* enclosure management info
+ * per PM slot */
};
static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
@@ -262,9 +287,20 @@ static int ahci_port_suspend(struct ata_
static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
static int ahci_pci_device_resume(struct pci_dev *pdev);
#endif
+static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
+static ssize_t ahci_activity_store(struct ata_device *dev,
+ enum sw_activity val);
+static void ahci_init_sw_activity(struct ata_link *link);
static struct class_device_attribute *ahci_shost_attrs[] = {
&class_device_attr_link_power_management_policy,
+ &class_device_attr_em_message_type,
+ &class_device_attr_em_message,
+ NULL
+};
+
+static struct device_attribute *ahci_sdev_attrs[] = {
+ &dev_attr_sw_activity,
NULL
};
@@ -286,6 +322,7 @@ static struct scsi_host_template ahci_sh
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
.shost_attrs = ahci_shost_attrs,
+ .sdev_attrs = ahci_sdev_attrs,
};
static const struct ata_port_operations ahci_ops = {
@@ -320,6 +357,11 @@ static const struct ata_port_operations
.enable_pm = ahci_enable_alpm,
.disable_pm = ahci_disable_alpm,
+ .em_show = ahci_led_show,
+ .em_store = ahci_led_store,
+ .sw_activity_show = ahci_activity_show,
+ .sw_activity_store = ahci_activity_store,
+
.port_start = ahci_port_start,
.port_stop = ahci_port_stop,
};
@@ -578,6 +620,11 @@ static struct pci_driver ahci_pci_driver
#endif
};
+static int ahci_em_messages = 1;
+module_param(ahci_em_messages, int, 0444);
+/* add other LED protocol types when they become supported */
+MODULE_PARM_DESC(ahci_em_messages,
+ "Set AHCI Enclosure Management Message type (0 = disabled, 1 = LED");
static inline int ahci_nr_ports(u32 cap)
{
@@ -1005,11 +1052,28 @@ static void ahci_power_down(struct ata_p
static void ahci_start_port(struct ata_port *ap)
{
+ struct ahci_port_priv *pp = ap->private_data;
+ struct ata_link *link;
+ struct ahci_em_priv *emp;
+
/* enable FIS reception */
ahci_start_fis_rx(ap);
/* enable DMA */
ahci_start_engine(ap);
+
+ /* turn on LEDs */
+ if (ap->flags & ATA_FLAG_EM) {
+ ata_port_for_each_link(link, ap) {
+ emp = &pp->em_priv[link->pmp];
+ ahci_transmit_led_message(ap, emp->led_state, 4);
+ }
+ }
+
+ if (ap->flags & ATA_FLAG_SW_ACTIVITY)
+ ata_port_for_each_link(link, ap)
+ ahci_init_sw_activity(link);
+
}
static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
@@ -1085,6 +1149,230 @@ static int ahci_reset_controller(struct
return 0;
}
+static void ahci_sw_activity(struct ata_link *link)
+{
+ struct ata_port *ap = link->ap;
+ struct ahci_port_priv *pp = ap->private_data;
+ struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
+
+ if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
+ return;
+
+ emp->activity++;
+ if (!timer_pending(&emp->timer))
+ mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
+}
+
+static void ahci_sw_activity_blink(unsigned long arg)
+{
+ struct ata_link *link = (struct ata_link *)arg;
+ struct ata_port *ap = link->ap;
+ struct ahci_port_priv *pp = ap->private_data;
+ struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
+ unsigned long led_message = emp->led_state;
+ u32 activity_led_state;
+
+ led_message &= 0xffff0000;
+ led_message |= ap->port_no | (link->pmp << 8);
+
+ /* check to see if we've had activity. If so,
+ * toggle state of LED and reset timer. If not,
+ * turn LED to desired idle state.
+ */
+ if (emp->saved_activity != emp->activity) {
+ emp->saved_activity = emp->activity;
+ /* get the current LED state */
+ activity_led_state = led_message & 0x00010000;
+
+ if (activity_led_state)
+ activity_led_state = 0;
+ else
+ activity_led_state = 1;
+
+ /* clear old state */
+ led_message &= 0xfff8ffff;
+
+ /* toggle state */
+ led_message |= (activity_led_state << 16);
+ mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
+ } else {
+ /* switch to idle */
+ led_message &= 0xfff8ffff;
+ if (emp->blink_policy == BLINK_OFF)
+ led_message |= (1 << 16);
+ }
+ ahci_transmit_led_message(ap, led_message, 4);
+}
+
+static void ahci_init_sw_activity(struct ata_link *link)
+{
+ struct ata_port *ap = link->ap;
+ struct ahci_port_priv *pp = ap->private_data;
+ struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
+
+ /* init activity stats, setup timer */
+ emp->saved_activity = emp->activity = 0;
+ setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link);
+
+ /* check our blink policy and set flag for link if it's enabled */
+ if (emp->blink_policy)
+ link->flags |= ATA_LFLAG_SW_ACTIVITY;
+}
+
+static int ahci_reset_em(struct ata_host *host)
+{
+ void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
+ u32 em_ctl;
+
+ em_ctl = readl(mmio + HOST_EM_CTL);
+ if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
+ return -EINVAL;
+
+ writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
+ return 0;
+}
+
+static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
+ ssize_t size)
+{
+ struct ahci_host_priv *hpriv = ap->host->private_data;
+ struct ahci_port_priv *pp = ap->private_data;
+ void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
+ u32 em_ctl;
+ u32 message[] = {0, 0};
+ unsigned int flags;
+ int pmp;
+ struct ahci_em_priv *emp;
+
+ /* get the slot number from the message */
+ pmp = (state & 0x0000ff00) >> 8;
+ if (pmp < MAX_SLOTS)
+ emp = &pp->em_priv[pmp];
+ else
+ return -EINVAL;
+
+ spin_lock_irqsave(ap->lock, flags);
+
+ /*
+ * if we are still busy transmitting a previous message,
+ * do not allow
+ */
+ em_ctl = readl(mmio + HOST_EM_CTL);
+ if (em_ctl & EM_CTL_TM) {
+ spin_unlock_irqrestore(ap->lock, flags);
+ return -EINVAL;
+ }
+
+ /*
+ * create message header - this is all zero except for
+ * the message size, which is 4 bytes.
+ */
+ message[0] |= (4 << 8);
+
+ /* ignore 0:4 of byte zero, fill in port info yourself */
+ message[1] = ((state & 0xfffffff0) | ap->port_no);
+
+ /* write message to EM_LOC */
+ writel(message[0], mmio + hpriv->em_loc);
+ writel(message[1], mmio + hpriv->em_loc+4);
+
+ /* save off new led state for port/slot */
+ emp->led_state = message[1];
+
+ /*
+ * tell hardware to transmit the message
+ */
+ writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
+
+ spin_unlock_irqrestore(ap->lock, flags);
+ return size;
+}
+
+static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
+{
+ struct ahci_port_priv *pp = ap->private_data;
+ struct ata_link *link;
+ struct ahci_em_priv *emp;
+ int rc = 0;
+
+ ata_port_for_each_link(link, ap) {
+ emp = &pp->em_priv[link->pmp];
+ rc += sprintf(buf, "%lx\n", emp->led_state);
+ }
+ return rc;
+}
+
+static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
+ size_t size)
+{
+ int state;
+ int pmp;
+ struct ahci_port_priv *pp = ap->private_data;
+ struct ahci_em_priv *emp;
+
+ state = simple_strtoul(buf, NULL, 0);
+
+ /* get the slot number from the message */
+ pmp = (state & 0x0000ff00) >> 8;
+ if (pmp < MAX_SLOTS)
+ emp = &pp->em_priv[pmp];
+ else
+ return -EINVAL;
+
+ /* mask off the activity bits if we are in sw_activity
+ * mode, user should turn off sw_activity before setting
+ * activity led through em_message
+ */
+ if (emp->blink_policy)
+ state &= 0xfff8ffff;
+
+ return ahci_transmit_led_message(ap, state, size);
+}
+
+static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
+{
+ struct ata_link *link = dev->link;
+ struct ata_port *ap = link->ap;
+ struct ahci_port_priv *pp = ap->private_data;
+ struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
+ u32 port_led_state = emp->led_state;
+
+ /* save the desired Activity LED behavior */
+ if (val == OFF) {
+ /* clear LFLAG */
+ link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
+
+ /* set the LED to OFF */
+ port_led_state &= 0xfff80000;
+ port_led_state |= (ap->port_no | (link->pmp << 8));
+ ahci_transmit_led_message(ap, port_led_state, 4);
+ } else {
+ link->flags |= ATA_LFLAG_SW_ACTIVITY;
+ if (val == BLINK_OFF) {
+ /* set LED to ON for idle */
+ port_led_state &= 0xfff80000;
+ port_led_state |= (ap->port_no | (link->pmp << 8));
+ port_led_state |= 0x00010000; /* check this */
+ ahci_transmit_led_message(ap, port_led_state, 4);
+ }
+ }
+ emp->blink_policy = val;
+ return 0;
+}
+
+static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
+{
+ struct ata_link *link = dev->link;
+ struct ata_port *ap = link->ap;
+ struct ahci_port_priv *pp = ap->private_data;
+ struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
+
+ /* display the saved value of activity behavior for this
+ * disk.
+ */
+ return sprintf(buf, "%d\n", emp->blink_policy);
+}
+
static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
int port_no, void __iomem *mmio,
void __iomem *port_mmio)
@@ -1781,6 +2069,8 @@ static unsigned int ahci_qc_issue(struct
writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
readl(port_mmio + PORT_CMD_ISSUE); /* flush */
+ ahci_sw_activity(qc->dev->link);
+
return 0;
}
@@ -2113,7 +2403,8 @@ static void ahci_print_info(struct ata_h
dev_printk(KERN_INFO, &pdev->dev,
"flags: "
"%s%s%s%s%s%s%s"
- "%s%s%s%s%s%s%s\n"
+ "%s%s%s%s%s%s%s"
+ "%s\n"
,
cap & (1 << 31) ? "64bit " : "",
@@ -2130,7 +2421,8 @@ static void ahci_print_info(struct ata_h
cap & (1 << 17) ? "pmp " : "",
cap & (1 << 15) ? "pio " : "",
cap & (1 << 14) ? "slum " : "",
- cap & (1 << 13) ? "part " : ""
+ cap & (1 << 13) ? "part " : "",
+ cap & (1 << 6) ? "ems ": ""
);
}
@@ -2241,12 +2533,33 @@ static int ahci_init_one(struct pci_dev
if (hpriv->cap & HOST_CAP_PMP)
pi.flags |= ATA_FLAG_PMP;
+ if (ahci_em_messages && (hpriv->cap & HOST_CAP_EMS)) {
+ u8 messages;
+ void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
+ u32 em_loc = readl(mmio + HOST_EM_LOC);
+ u32 em_ctl = readl(mmio + HOST_EM_CTL);
+
+ messages = (em_ctl & 0x000f0000) >> 16;
+
+ /* we only support LED message type right now */
+ if ((messages & 0x01) && (ahci_em_messages == 1)) {
+ /* store em_loc */
+ hpriv->em_loc = ((em_loc >> 16) * 4);
+ pi.flags |= ATA_FLAG_EM;
+ if (!(em_ctl & EM_CTL_ALHD))
+ pi.flags |= ATA_FLAG_SW_ACTIVITY;
+ }
+ }
+
host = ata_host_alloc_pinfo(&pdev->dev, ppi, fls(hpriv->port_map));
if (!host)
return -ENOMEM;
host->iomap = pcim_iomap_table(pdev);
host->private_data = hpriv;
+ if (pi.flags & ATA_FLAG_EM)
+ ahci_reset_em(host);
+
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
void __iomem *port_mmio = ahci_port_base(ap);
@@ -2258,6 +2571,10 @@ static int ahci_init_one(struct pci_dev
/* set initial link pm policy */
ap->pm_policy = NOT_AVAILABLE;
+ /* set enclosure management message type */
+ if (ap->flags & ATA_FLAG_EM)
+ ap->em_message_type = ahci_em_messages;
+
/* standard SATA port setup */
if (hpriv->port_map & (1 << i))
ap->ioaddr.cmd_addr = port_mmio;
Index: linux-2.6/drivers/ata/libata-scsi.c
===================================================================
--- linux-2.6.orig/drivers/ata/libata-scsi.c 2008-01-15 13:32:27.000000000 -0800
+++ linux-2.6/drivers/ata/libata-scsi.c 2008-01-15 15:02:25.000000000 -0800
@@ -178,6 +178,83 @@ CLASS_DEVICE_ATTR(link_power_management_
ata_scsi_lpm_show, ata_scsi_lpm_put);
EXPORT_SYMBOL_GPL(class_device_attr_link_power_management_policy);
+static ssize_t
+ata_scsi_em_message_store(struct class_device *class_dev, const char *buf,
+ size_t count)
+{
+ struct Scsi_Host *shost = class_to_shost(class_dev);
+ struct ata_port *ap = ata_shost_to_port(shost);
+ if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
+ return ap->ops->em_store(ap, buf, count);
+ return -EINVAL;
+}
+
+static ssize_t
+ata_scsi_em_message_show(struct class_device *class_dev, char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(class_dev);
+ struct ata_port *ap = ata_shost_to_port(shost);
+
+ if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
+ return ap->ops->em_show(ap, buf);
+ return -EINVAL;
+}
+CLASS_DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
+ ata_scsi_em_message_show, ata_scsi_em_message_store);
+EXPORT_SYMBOL_GPL(class_device_attr_em_message);
+
+static ssize_t
+ata_scsi_em_message_type_show(struct class_device *class_dev, char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(class_dev);
+ struct ata_port *ap = ata_shost_to_port(shost);
+
+ return snprintf(buf, 23, "%d\n", ap->em_message_type);
+}
+CLASS_DEVICE_ATTR(em_message_type, S_IRUGO,
+ ata_scsi_em_message_type_show, NULL);
+EXPORT_SYMBOL_GPL(class_device_attr_em_message_type);
+
+static ssize_t
+ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
+ struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
+
+ if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
+ return ap->ops->sw_activity_show(atadev, buf);
+ return -EINVAL;
+}
+
+static ssize_t
+ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
+ struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
+ enum sw_activity val;
+ int rc;
+
+ if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
+ val = simple_strtoul(buf, NULL, 0);
+ switch (val) {
+ case OFF: case BLINK_ON: case BLINK_OFF:
+ rc = ap->ops->sw_activity_store(atadev, val);
+ if (!rc)
+ return count;
+ else
+ return rc;
+ }
+ }
+ return -EINVAL;
+}
+DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
+ ata_scsi_activity_store);
+EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
+
static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *))
{
Index: linux-2.6/include/linux/libata.h
===================================================================
--- linux-2.6.orig/include/linux/libata.h 2007-12-19 16:11:01.000000000 -0800
+++ linux-2.6/include/linux/libata.h 2008-01-15 15:02:25.000000000 -0800
@@ -169,6 +169,7 @@ enum {
ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
+ ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
/* struct ata_port flags */
ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
@@ -191,6 +192,10 @@ enum {
ATA_FLAG_AN = (1 << 18), /* controller supports AN */
ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
+ ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
+ * management */
+ ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
+ * led */
/* The following flag belongs to ap->pflags but is kept in
* ap->flags because it's referenced in many LLDs and will be
@@ -398,7 +403,17 @@ enum link_pm {
MAX_PERFORMANCE,
MEDIUM_POWER,
};
+
+enum sw_activity {
+ OFF,
+ BLINK_ON,
+ BLINK_OFF,
+};
+
extern struct class_device_attribute class_device_attr_link_power_management_policy;
+extern struct class_device_attribute class_device_attr_em_message_type;
+extern struct class_device_attribute class_device_attr_em_message;
+extern struct device_attribute dev_attr_sw_activity;
struct ata_ioports {
void __iomem *cmd_addr;
@@ -652,6 +667,7 @@ struct ata_port {
struct timer_list fastdrain_timer;
unsigned long fastdrain_cnt;
+ int em_message_type;
void *private_data;
#ifdef CONFIG_ATA_ACPI
@@ -724,6 +740,12 @@ struct ata_port_operations {
void (*bmdma_stop) (struct ata_queued_cmd *qc);
u8 (*bmdma_status) (struct ata_port *ap);
+ ssize_t (*em_show)(struct ata_port *ap, char *buf);
+ ssize_t (*em_store)(struct ata_port *ap, const char *message,
+ size_t size);
+ ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
+ ssize_t (*sw_activity_store)(struct ata_device *dev,
+ enum sw_activity val);
};
struct ata_port_info {
-
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