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-rw-r--r--drivers/ata/ahci.c24
-rw-r--r--drivers/ata/libata-core.c13
-rw-r--r--drivers/ata/libata-eh.c73
-rw-r--r--drivers/ata/libata-scsi.c1
-rw-r--r--drivers/ata/libata.h1
-rw-r--r--drivers/ata/sata_sil24.c5
6 files changed, 91 insertions, 26 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index cf3404467ceb..9f3c591c7214 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1356,27 +1356,17 @@ static void ahci_port_intr(struct ata_port *ap)
}
if (status & PORT_IRQ_SDB_FIS) {
- /*
- * if this is an ATAPI device with AN turned on,
- * then we should interrogate the device to
- * determine the cause of the interrupt
- *
- * for AN - this we should check the SDB FIS
- * and find the I and N bits set
+ /* If the 'N' bit in word 0 of the FIS is set, we just
+ * received asynchronous notification. Tell libata
+ * about it. Note that as the SDB FIS itself is
+ * accessible, SNotification can be emulated by the
+ * driver but don't bother for the time being.
*/
const __le32 *f = pp->rx_fis + RX_FIS_SDB;
u32 f0 = le32_to_cpu(f[0]);
- /* check the 'N' bit in word 0 of the FIS */
- if (f0 & (1 << 15)) {
- int port_addr = ((f0 & 0x00000f00) >> 8);
- struct ata_device *adev;
- if (port_addr < ATA_MAX_DEVICES) {
- adev = &ap->link.device[port_addr];
- if (adev->flags & ATA_DFLAG_AN)
- ata_scsi_media_change_notify(adev);
- }
- }
+ if (f0 & (1 << 15))
+ sata_async_notification(ap);
}
if (ap->link.sactive)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 376dbd80cc93..8b08e7bdd24d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2016,6 +2016,7 @@ int ata_dev_configure(struct ata_device *dev)
else if (dev->class == ATA_DEV_ATAPI) {
const char *cdb_intr_string = "";
const char *atapi_an_string = "";
+ u32 sntf;
rc = atapi_cdb_len(id);
if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
@@ -2027,11 +2028,14 @@ int ata_dev_configure(struct ata_device *dev)
}
dev->cdb_len = (unsigned int) rc;
- /*
- * check to see if this ATAPI device supports
- * Asynchronous Notification
+ /* Enable ATAPI AN if both the host and device have
+ * the support. If PMP is attached, SNTF is required
+ * to enable ATAPI AN to discern between PHY status
+ * changed notifications and ATAPI ANs.
*/
- if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id)) {
+ if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
+ (!ap->nr_pmp_links ||
+ sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
unsigned int err_mask;
/* issue SET feature command to turn this on */
@@ -7248,6 +7252,7 @@ EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
EXPORT_SYMBOL_GPL(ata_link_abort);
EXPORT_SYMBOL_GPL(ata_port_abort);
EXPORT_SYMBOL_GPL(ata_port_freeze);
+EXPORT_SYMBOL_GPL(sata_async_notification);
EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 3c31e10caf21..60186f8ac3a1 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -905,6 +905,79 @@ int ata_port_freeze(struct ata_port *ap)
}
/**
+ * sata_async_notification - SATA async notification handler
+ * @ap: ATA port where async notification is received
+ *
+ * Handler to be called when async notification via SDB FIS is
+ * received. This function schedules EH if necessary.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ *
+ * RETURNS:
+ * 1 if EH is scheduled, 0 otherwise.
+ */
+int sata_async_notification(struct ata_port *ap)
+{
+ u32 sntf;
+ int rc;
+
+ if (!(ap->flags & ATA_FLAG_AN))
+ return 0;
+
+ rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
+ if (rc == 0)
+ sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
+
+ if (!ap->nr_pmp_links || rc) {
+ /* PMP is not attached or SNTF is not available */
+ if (!ap->nr_pmp_links) {
+ /* PMP is not attached. Check whether ATAPI
+ * AN is configured. If so, notify media
+ * change.
+ */
+ struct ata_device *dev = ap->link.device;
+
+ if ((dev->class == ATA_DEV_ATAPI) &&
+ (dev->flags & ATA_DFLAG_AN))
+ ata_scsi_media_change_notify(dev);
+ return 0;
+ } else {
+ /* PMP is attached but SNTF is not available.
+ * ATAPI async media change notification is
+ * not used. The PMP must be reporting PHY
+ * status change, schedule EH.
+ */
+ ata_port_schedule_eh(ap);
+ return 1;
+ }
+ } else {
+ /* PMP is attached and SNTF is available */
+ struct ata_link *link;
+
+ /* check and notify ATAPI AN */
+ ata_port_for_each_link(link, ap) {
+ if (!(sntf & (1 << link->pmp)))
+ continue;
+
+ if ((link->device->class == ATA_DEV_ATAPI) &&
+ (link->device->flags & ATA_DFLAG_AN))
+ ata_scsi_media_change_notify(link->device);
+ }
+
+ /* If PMP is reporting that PHY status of some
+ * downstream ports has changed, schedule EH.
+ */
+ if (sntf & (1 << SATA_PMP_CTRL_PORT)) {
+ ata_port_schedule_eh(ap);
+ return 1;
+ }
+
+ return 0;
+ }
+}
+
+/**
* ata_eh_freeze_port - EH helper to freeze port
* @ap: ATA port to freeze
*
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 451f79c6fbac..df2e05738f3b 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3244,7 +3244,6 @@ void ata_scsi_media_change_notify(struct ata_device *dev)
scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE);
#endif
}
-EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
/**
* ata_scsi_hotplug - SCSI part of hotplug
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 0f3e355fdfd7..ebe22982e80c 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -119,6 +119,7 @@ extern int ata_scsi_add_hosts(struct ata_host *host,
struct scsi_host_template *sht);
extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
extern int ata_scsi_offline_dev(struct ata_device *dev);
+extern void ata_scsi_media_change_notify(struct ata_device *dev);
extern void ata_scsi_hotplug(struct work_struct *work);
extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
unsigned int buflen);
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 9acfce43bde4..b4f81eb8bbbe 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -821,11 +821,8 @@ static void sil24_error_intr(struct ata_port *ap)
ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
if (irq_stat & PORT_IRQ_SDB_NOTIFY) {
- struct ata_device *dev = ap->link.device;
-
ata_ehi_push_desc(ehi, "SDB notify");
- if (dev->flags & ATA_DFLAG_AN)
- ata_scsi_media_change_notify(dev);
+ sata_async_notification(ap);
}
if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 09:20:05 +0000