scsi: libsas: Add smp_ata_check_ready_type()

Create function smp_ata_check_ready_type() for LLDDs to wait for SATA
devices to come up after a link reset.
Signed-off-by: Jie Zhan <zhanjie9@hisilicon.com>
Link: https://lore.kernel.org/r/20221118083714.4034612-4-zhanjie9@hisilicon.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/libsas/sas_ata.c

@@ -287,6 +287,31 @@ static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy)
 		return 1;
 }
 
+int smp_ata_check_ready_type(struct ata_link *link)
+{
+	struct domain_device *dev = link->ap->private_data;
+	struct sas_phy *phy = sas_get_local_phy(dev);
+	struct domain_device *ex_dev = dev->parent;
+	enum sas_device_type type = SAS_PHY_UNUSED;
+	u8 sas_addr[SAS_ADDR_SIZE];
+	int res;
+
+	res = sas_get_phy_attached_dev(ex_dev, phy->number, sas_addr, &type);
+	sas_put_local_phy(phy);
+	if (res)
+		return res;
+
+	switch (type) {
+	case SAS_SATA_PENDING:
+		return 0;
+	case SAS_END_DEVICE:
+		return 1;
+	default:
+		return -ENODEV;
+	}
+}
+EXPORT_SYMBOL_GPL(smp_ata_check_ready_type);
+
 static int smp_ata_check_ready(struct ata_link *link)
 {
 	int res;

drivers/scsi/libsas/sas_expander.c

@@ -1688,8 +1688,8 @@ static int sas_get_phy_change_count(struct domain_device *dev,
 	return res;
 }
 
-static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
-				    u8 *sas_addr, enum sas_device_type *type)
+int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
+			     u8 *sas_addr, enum sas_device_type *type)
 {
 	int res;
 	struct smp_disc_resp *disc_resp;

drivers/scsi/libsas/sas_internal.h

@@ -88,6 +88,8 @@ struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id);
 int sas_ex_phy_discover(struct domain_device *dev, int single);
 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
 			    struct smp_rps_resp *rps_resp);
+int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
+			     u8 *sas_addr, enum sas_device_type *type);
 int sas_try_ata_reset(struct asd_sas_phy *phy);
 void sas_hae_reset(struct work_struct *work);
 

include/scsi/sas_ata.h

@@ -36,6 +36,7 @@ void sas_ata_device_link_abort(struct domain_device *dev, bool force_reset);
 int sas_execute_ata_cmd(struct domain_device *device, u8 *fis,
 			int force_phy_id);
 int sas_ata_wait_after_reset(struct domain_device *dev, unsigned long deadline);
+int smp_ata_check_ready_type(struct ata_link *link);
 #else
 
 
@@ -104,6 +105,11 @@ static inline int sas_ata_wait_after_reset(struct domain_device *dev,
 {
 	return -ETIMEDOUT;
 }
+
+static inline int smp_ata_check_ready_type(struct ata_link *link)
+{
+	return 0;
+}
 #endif
 
 #endif /* _SAS_ATA_H_ */