scsi: qla2xxx: Add switch command to simplify fabric discovery

- add "async" gpn_ft, gnn_ft, gfpn_id, gnn_id switch commands.
- For 8G and newer adapters, use async commands when it comes to
fabric scan to reduce bottle neck.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 70 insertions, 2 deletions

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index bf50b4fbe648..240767c862e6 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2270,11 +2270,13 @@ struct ct_sns_desc {
 
 enum discovery_state {
 	DSC_DELETED,
+	DSC_GNN_ID,
 	DSC_GID_PN,
 	DSC_GNL,
 	DSC_LOGIN_PEND,
 	DSC_LOGIN_FAILED,
 	DSC_GPDB,
+	DSC_GFPN_ID,
 	DSC_GPSC,
 	DSC_UPD_FCPORT,
 	DSC_LOGIN_COMPLETE,
@@ -2304,8 +2306,9 @@ enum fcport_mgt_event {
 	FCME_GPDB_DONE,
 	FCME_GPNID_DONE,
 	FCME_GFFID_DONE,
-	FCME_DELETE_DONE,
 	FCME_ADISC_DONE,
+	FCME_GNNID_DONE,
+	FCME_GFPNID_DONE,
 };
 
 enum rscn_addr_format {
@@ -2338,6 +2341,7 @@ typedef struct fc_port {
 	unsigned int login_pause:1;
 	unsigned int login_succ:1;
 	unsigned int query:1;
+	unsigned int id_changed:1;
 
 	struct work_struct nvme_del_work;
 	struct completion nvme_del_done;
@@ -2485,6 +2489,11 @@ static const char * const port_state_str[] = {
 #define	GA_NXT_REQ_SIZE	(16 + 4)
 #define	GA_NXT_RSP_SIZE	(16 + 620)
 
+#define	GPN_FT_CMD	0x172
+#define	GPN_FT_REQ_SIZE	(16 + 4)
+#define	GNN_FT_CMD	0x173
+#define	GNN_FT_REQ_SIZE	(16 + 4)
+
 #define	GID_PT_CMD	0x1A1
 #define	GID_PT_REQ_SIZE	(16 + 4)
 
@@ -2740,6 +2749,13 @@ struct ct_sns_req {
 		} port_id;
 
 		struct {
+			uint8_t reserved;
+			uint8_t domain;
+			uint8_t area;
+			uint8_t port_type;
+		} gpn_ft;
+
+		struct {
 			uint8_t port_type;
 			uint8_t domain;
 			uint8_t area;
@@ -2852,6 +2868,27 @@ struct ct_sns_gid_pt_data {
 	uint8_t port_id[3];
 };
 
+/* It's the same for both GPN_FT and GNN_FT */
+struct ct_sns_gpnft_rsp {
+	struct {
+		struct ct_cmd_hdr header;
+		uint16_t response;
+		uint16_t residual;
+		uint8_t fragment_id;
+		uint8_t reason_code;
+		uint8_t explanation_code;
+		uint8_t vendor_unique;
+	};
+	/* Assume the largest number of targets for the union */
+	struct ct_sns_gpn_ft_data {
+		u8 control_byte;
+		u8 port_id[3];
+		u32 reserved;
+		u8 port_name[8];
+	} entries[1];
+};
+
+/* CT command response */
 struct ct_sns_rsp {
 	struct ct_rsp_hdr header;
 
@@ -2927,6 +2964,24 @@ struct ct_sns_pkt {
 	} p;
 };
 
+struct ct_sns_gpnft_pkt {
+	union {
+		struct ct_sns_req req;
+		struct ct_sns_gpnft_rsp rsp;
+	} p;
+};
+
+struct fab_scan_rp {
+	port_id_t id;
+	u8 port_name[8];
+	u8 node_name[8];
+};
+
+struct fab_scan {
+	struct fab_scan_rp *l;
+	u32 size;
+};
+
 /*
  * SNS command structures -- for 2200 compatibility.
  */
@@ -3143,6 +3198,11 @@ enum qla_work_type {
 	QLA_EVT_RELOGIN,
 	QLA_EVT_ASYNC_PRLO,
 	QLA_EVT_ASYNC_PRLO_DONE,
+	QLA_EVT_GPNFT,
+	QLA_EVT_GPNFT_DONE,
+	QLA_EVT_GNNFT_DONE,
+	QLA_EVT_GNNID,
+	QLA_EVT_GFPNID,
 };
 
 
@@ -3184,7 +3244,9 @@ struct qla_work_evt {
 		struct {
 			port_id_t id;
 			u8 port_name[8];
+			u8 node_name[8];
 			void *pla;
+			u8 fc4_type;
 		} new_sess;
 		struct { /*Get PDB, Get Speed, update fcport, gnl, gidpn */
 			fc_port_t *fcport;
@@ -3195,6 +3257,9 @@ struct qla_work_evt {
 			u8 iocb[IOCB_SIZE];
 			int type;
 		} nack;
+		struct {
+			u8 fc4_type;
+		} gpnft;
 	 } u;
 };
 
@@ -3729,6 +3794,8 @@ struct qla_hw_data {
 	(IS_QLA81XX(ha) || IS_QLA83XX(ha) || IS_QLA27XX(ha))
 #define IS_EXLOGIN_OFFLD_CAPABLE(ha) \
 	(IS_QLA25XX(ha) || IS_QLA81XX(ha) || IS_QLA83XX(ha) || IS_QLA27XX(ha))
+#define USE_ASYNC_SCAN(ha) (IS_QLA25XX(ha) || IS_QLA81XX(ha) ||\
+	IS_QLA83XX(ha) || IS_QLA27XX(ha))
 
 	/* HBA serial number */
 	uint8_t		serial0;
@@ -3811,7 +3878,7 @@ struct qla_hw_data {
 	int		exchoffld_size;
 	int 		exchoffld_count;
 
-	void		*swl;
+	void            *swl;
 
 	/* These are used by mailbox operations. */
 	uint16_t mailbox_out[MAILBOX_REGISTER_COUNT];
@@ -4271,6 +4338,7 @@ typedef struct scsi_qla_host {
 	uint8_t n2n_port_name[WWN_SIZE];
 	uint16_t	n2n_id;
 	struct list_head gpnid_list;
+	struct fab_scan scan;
 } scsi_qla_host_t;
 
 struct qla27xx_image_status {