[SCSI] bfa: Introduced initiator based lun masking feature.

- Added support to enable initiator based lun masking.
- Initiator based Lun masking works similar to zoning where
  initiator port is allowed to see only those LUNs which are
  configured to be seen.
Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/bfa/bfa.h

@@ -382,6 +382,22 @@ int bfa_iocfc_get_pbc_vports(struct bfa_s *bfa,
 #define bfa_get_fw_clock_res(__bfa)		\
 	((__bfa)->iocfc.cfgrsp->fwcfg.fw_tick_res)
 
+/*
+ * lun mask macros return NULL when min cfg is enabled and there is
+ * no memory allocated for lunmask.
+ */
+#define bfa_get_lun_mask(__bfa)					\
+	((&(__bfa)->modules.dconf_mod)->min_cfg) ? NULL :	\
+	 (&(BFA_DCONF_MOD(__bfa)->dconf->lun_mask))
+
+#define bfa_get_lun_mask_list(_bfa)				\
+	((&(_bfa)->modules.dconf_mod)->min_cfg) ? NULL :	\
+	 (bfa_get_lun_mask(_bfa)->lun_list)
+
+#define bfa_get_lun_mask_status(_bfa)				\
+	(((&(_bfa)->modules.dconf_mod)->min_cfg)		\
+	 ? BFA_LUNMASK_MINCFG : ((bfa_get_lun_mask(_bfa))->status))
+
 void bfa_get_pciids(struct bfa_pciid_s **pciids, int *npciids);
 void bfa_cfg_get_default(struct bfa_iocfc_cfg_s *cfg);
 void bfa_cfg_get_min(struct bfa_iocfc_cfg_s *cfg);

drivers/scsi/bfa/bfa_defs_svc.h

@@ -672,6 +672,12 @@ struct bfa_itnim_iostats_s {
 	u32	tm_iocdowns;		/*  TM cleaned-up due to IOC down   */
 	u32	tm_cleanups;		/*  TM cleanup requests	*/
 	u32	tm_cleanup_comps;	/*  TM cleanup completions	*/
+	u32	lm_lun_across_sg;	/*  LM lun is across sg data buf */
+	u32	lm_lun_not_sup;		/*  LM lun not supported */
+	u32	lm_rpl_data_changed;	/*  LM report-lun data changed */
+	u32	lm_wire_residue_changed; /* LM report-lun rsp residue changed */
+	u32	lm_small_buf_addresidue; /* LM buf smaller than reported cnt */
+	u32	lm_lun_not_rdy;		/* LM lun not ready */
 };
 
 /* Modify char* port_stt[] in bfal_port.c if a new state was added */
@@ -787,6 +793,28 @@ enum bfa_port_linkstate_rsn {
 	CEE_ISCSI_PRI_PFC_OFF			= 42,
 	CEE_ISCSI_PRI_OVERLAP_FCOE_PRI		= 43
 };
+
+#define MAX_LUN_MASK_CFG 16
+
+/*
+ * Initially flash content may be fff. On making LUN mask enable and disable
+ * state chnage.  when report lun command is being processed it goes from
+ * BFA_LUN_MASK_ACTIVE to BFA_LUN_MASK_FETCH and comes back to
+ * BFA_LUN_MASK_ACTIVE.
+ */
+enum bfa_ioim_lun_mask_state_s {
+	BFA_IOIM_LUN_MASK_INACTIVE = 0,
+	BFA_IOIM_LUN_MASK_ACTIVE = 1,
+	BFA_IOIM_LUN_MASK_FETCHED = 2,
+};
+
+enum bfa_lunmask_state_s {
+	BFA_LUNMASK_DISABLED = 0x00,
+	BFA_LUNMASK_ENABLED = 0x01,
+	BFA_LUNMASK_MINCFG = 0x02,
+	BFA_LUNMASK_UNINITIALIZED = 0xff,
+};
+
 #pragma pack(1)
 /*
  * LUN mask configuration
@@ -794,7 +822,7 @@ enum bfa_port_linkstate_rsn {
 struct bfa_lun_mask_s {
 	wwn_t		lp_wwn;
 	wwn_t		rp_wwn;
-	lun_t		lun;
+	struct scsi_lun	lun;
 	u8		ua;
 	u8		rsvd[3];
 	u16		rp_tag;

drivers/scsi/bfa/bfa_fc.h

@@ -21,7 +21,6 @@
 #include "bfad_drv.h"
 
 typedef u64 wwn_t;
-typedef u64 lun_t;
 
 #define WWN_NULL	(0)
 #define FC_SYMNAME_MAX	256	/*  max name server symbolic name size */
@@ -57,6 +56,161 @@ struct scsi_cdb_s {
 
 #define SCSI_MAX_ALLOC_LEN      0xFF    /* maximum allocarion length */
 
+#define SCSI_SENSE_CUR_ERR	0x70
+#define SCSI_SENSE_DEF_ERR	0x71
+
+/*
+ * SCSI additional sense codes
+ */
+#define SCSI_ASC_LUN_NOT_READY		0x04
+#define SCSI_ASC_LUN_NOT_SUPPORTED	0x25
+#define SCSI_ASC_TOCC			0x3F
+
+/*
+ * SCSI additional sense code qualifiers
+ */
+#define SCSI_ASCQ_MAN_INTR_REQ		0x03	/* manual intervention req */
+#define SCSI_ASCQ_RL_DATA_CHANGED	0x0E	/* report luns data changed */
+
+/*
+ * Methods of reporting informational exceptions
+ */
+#define SCSI_MP_IEC_UNIT_ATTN		0x2	/* generate unit attention */
+
+struct scsi_report_luns_data_s {
+	u32		lun_list_length;	/* length of LUN list length */
+	u32		reserved;
+	struct scsi_lun	lun[1];			/* first LUN in lun list */
+};
+
+struct scsi_inquiry_vendor_s {
+	u8	vendor_id[8];
+};
+
+struct scsi_inquiry_prodid_s {
+	u8	product_id[16];
+};
+
+struct scsi_inquiry_prodrev_s {
+	u8	product_rev[4];
+};
+
+struct scsi_inquiry_data_s {
+#ifdef __BIG_ENDIAN
+	u8		peripheral_qual:3;	/* peripheral qualifier */
+	u8		device_type:5;		/* peripheral device type */
+	u8		rmb:1;			/* removable medium bit */
+	u8		device_type_mod:7;	/* device type modifier */
+	u8		version;
+	u8		aenc:1;		/* async evt notification capability */
+	u8		trm_iop:1;	/* terminate I/O process */
+	u8		norm_aca:1;	/* normal ACA supported */
+	u8		hi_support:1;	/* SCSI-3: supports REPORT LUNS */
+	u8		rsp_data_format:4;
+	u8		additional_len;
+	u8		sccs:1;
+	u8		reserved1:7;
+	u8		reserved2:1;
+	u8		enc_serv:1;	/* enclosure service component */
+	u8		reserved3:1;
+	u8		multi_port:1;	/* multi-port device */
+	u8		m_chngr:1;	/* device in medium transport element */
+	u8		ack_req_q:1;	/* SIP specific bit */
+	u8		addr32:1;	/* SIP specific bit */
+	u8		addr16:1;	/* SIP specific bit */
+	u8		rel_adr:1;	/* relative address */
+	u8		w_bus32:1;
+	u8		w_bus16:1;
+	u8		synchronous:1;
+	u8		linked_commands:1;
+	u8		trans_dis:1;
+	u8		cmd_queue:1;	/* command queueing supported */
+	u8		soft_reset:1;	/* soft reset alternative (VS) */
+#else
+	u8		device_type:5;	/* peripheral device type */
+	u8		peripheral_qual:3; /* peripheral qualifier */
+	u8		device_type_mod:7; /* device type modifier */
+	u8		rmb:1;		/* removable medium bit */
+	u8		version;
+	u8		rsp_data_format:4;
+	u8		hi_support:1;	/* SCSI-3: supports REPORT LUNS */
+	u8		norm_aca:1;	/* normal ACA supported */
+	u8		terminate_iop:1;/* terminate I/O process */
+	u8		aenc:1;		/* async evt notification capability */
+	u8		additional_len;
+	u8		reserved1:7;
+	u8		sccs:1;
+	u8		addr16:1;	/* SIP specific bit */
+	u8		addr32:1;	/* SIP specific bit */
+	u8		ack_req_q:1;	/* SIP specific bit */
+	u8		m_chngr:1;	/* device in medium transport element */
+	u8		multi_port:1;	/* multi-port device */
+	u8		reserved3:1;	/* TBD - Vendor Specific */
+	u8		enc_serv:1;	/* enclosure service component */
+	u8		reserved2:1;
+	u8		soft_seset:1;	/* soft reset alternative (VS) */
+	u8		cmd_queue:1;	/* command queueing supported */
+	u8		trans_dis:1;
+	u8		linked_commands:1;
+	u8		synchronous:1;
+	u8		w_bus16:1;
+	u8		w_bus32:1;
+	u8		rel_adr:1;	/* relative address */
+#endif
+	struct scsi_inquiry_vendor_s	vendor_id;
+	struct scsi_inquiry_prodid_s	product_id;
+	struct scsi_inquiry_prodrev_s	product_rev;
+	u8		vendor_specific[20];
+	u8		reserved4[40];
+};
+
+/*
+ *	SCSI sense data format
+ */
+struct scsi_sense_s {
+#ifdef __BIG_ENDIAN
+	u8		valid:1;
+	u8		rsp_code:7;
+#else
+	u8		rsp_code:7;
+	u8		valid:1;
+#endif
+	u8		seg_num;
+#ifdef __BIG_ENDIAN
+	u8		file_mark:1;
+	u8		eom:1;		/* end of media */
+	u8		ili:1;		/* incorrect length indicator */
+	u8		reserved:1;
+	u8		sense_key:4;
+#else
+	u8		sense_key:4;
+	u8		reserved:1;
+	u8		ili:1;		/* incorrect length indicator */
+	u8		eom:1;		/* end of media */
+	u8		file_mark:1;
+#endif
+	u8		information[4];	/* device-type or cmd specific info */
+	u8		add_sense_length; /* additional sense length */
+	u8		command_info[4];/* command specific information */
+	u8		asc;		/* additional sense code */
+	u8		ascq;		/* additional sense code qualifier */
+	u8		fru_code;	/* field replaceable unit code */
+#ifdef __BIG_ENDIAN
+	u8		sksv:1;		/* sense key specific valid */
+	u8		c_d:1;		/* command/data bit */
+	u8		res1:2;
+	u8		bpv:1;		/* bit pointer valid */
+	u8		bpointer:3;	/* bit pointer */
+#else
+	u8		bpointer:3;	/* bit pointer */
+	u8		bpv:1;		/* bit pointer valid */
+	u8		res1:2;
+	u8		c_d:1;		/* command/data bit */
+	u8		sksv:1;		/* sense key specific valid */
+#endif
+	u8		fpointer[2];	/* field pointer */
+};
+
 /*
  * Fibre Channel Header Structure (FCHS) definition
  */

drivers/scsi/bfa/bfa_fcpim.h

@@ -110,6 +110,7 @@ struct bfad_ioim_s;
 struct bfad_tskim_s;
 
 typedef void    (*bfa_fcpim_profile_t) (struct bfa_ioim_s *ioim);
+typedef bfa_boolean_t (*bfa_ioim_lm_proc_rsp_data_t) (struct bfa_ioim_s *ioim);
 
 struct bfa_fcpim_s {
 	struct bfa_s		*bfa;
@@ -123,7 +124,7 @@ struct bfa_fcpim_s {
 	u32			path_tov;
 	u16			q_depth;
 	u8			reqq;		/*  Request queue to be used */
-	u8			rsvd;
+	u8			lun_masking_pending;
 	struct list_head	itnim_q;	/*  queue of active itnim */
 	struct list_head	ioim_resfree_q; /*  IOs waiting for f/w */
 	struct list_head	ioim_comp_q;	/*  IO global comp Q	*/
@@ -178,7 +179,9 @@ struct bfa_ioim_s {
 	bfa_cb_cbfn_t		io_cbfn;	/*  IO completion handler */
 	struct bfa_ioim_sp_s	*iosp;		/*  slow-path IO handling */
 	u8			reqq;		/*  Request queue for I/O */
+	u8			mode;		/*  IO is passthrough or not */
 	u64			start_time;	/*  IO's Profile start val */
+	bfa_ioim_lm_proc_rsp_data_t proc_rsp_data; /* RSP data adjust */
 };
 
 struct bfa_ioim_sp_s {
@@ -258,6 +261,10 @@ struct bfa_itnim_s {
 	(__ioim)->iotag |= k << BFA_IOIM_RETRY_TAG_OFFSET;		\
 } while (0)
 
+#define BFA_IOIM_TO_LPS(__ioim)		\
+	BFA_LPS_FROM_TAG(BFA_LPS_MOD(__ioim->bfa),	\
+		__ioim->itnim->rport->rport_info.lp_tag)
+
 static inline bfa_boolean_t
 bfa_ioim_maxretry_reached(struct bfa_ioim_s *ioim)
 {
@@ -407,4 +414,7 @@ void bfa_tskim_start(struct bfa_tskim_s *tskim,
 void bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
 			enum bfi_tskim_status tsk_status);
 
+void	bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn,
+			wwn_t rp_wwn, u16 rp_tag, u8 lp_tag);
+
 #endif /* __BFA_FCPIM_H__ */

drivers/scsi/bfa/bfa_svc.c

@@ -4677,6 +4677,7 @@ bfa_rport_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 		rp = BFA_RPORT_FROM_TAG(bfa, msg.create_rsp->bfa_handle);
 		rp->fw_handle = msg.create_rsp->fw_handle;
 		rp->qos_attr = msg.create_rsp->qos_attr;
+		bfa_rport_set_lunmask(bfa, rp);
 		WARN_ON(msg.create_rsp->status != BFA_STATUS_OK);
 		bfa_sm_send_event(rp, BFA_RPORT_SM_FWRSP);
 		break;
@@ -4684,6 +4685,7 @@ bfa_rport_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 	case BFI_RPORT_I2H_DELETE_RSP:
 		rp = BFA_RPORT_FROM_TAG(bfa, msg.delete_rsp->bfa_handle);
 		WARN_ON(msg.delete_rsp->status != BFA_STATUS_OK);
+		bfa_rport_unset_lunmask(bfa, rp);
 		bfa_sm_send_event(rp, BFA_RPORT_SM_FWRSP);
 		break;
 
@@ -4764,6 +4766,37 @@ bfa_rport_speed(struct bfa_rport_s *rport, enum bfa_port_speed speed)
 	bfa_sm_send_event(rport, BFA_RPORT_SM_SET_SPEED);
 }
 
+/* Set Rport LUN Mask */
+void
+bfa_rport_set_lunmask(struct bfa_s *bfa, struct bfa_rport_s *rp)
+{
+	struct bfa_lps_mod_s	*lps_mod = BFA_LPS_MOD(bfa);
+	wwn_t	lp_wwn, rp_wwn;
+	u8 lp_tag = (u8)rp->rport_info.lp_tag;
+
+	rp_wwn = ((struct bfa_fcs_rport_s *)rp->rport_drv)->pwwn;
+	lp_wwn = (BFA_LPS_FROM_TAG(lps_mod, rp->rport_info.lp_tag))->pwwn;
+
+	BFA_LPS_FROM_TAG(lps_mod, rp->rport_info.lp_tag)->lun_mask =
+					rp->lun_mask = BFA_TRUE;
+	bfa_fcpim_lunmask_rp_update(bfa, lp_wwn, rp_wwn, rp->rport_tag, lp_tag);
+}
+
+/* Unset Rport LUN mask */
+void
+bfa_rport_unset_lunmask(struct bfa_s *bfa, struct bfa_rport_s *rp)
+{
+	struct bfa_lps_mod_s	*lps_mod = BFA_LPS_MOD(bfa);
+	wwn_t	lp_wwn, rp_wwn;
+
+	rp_wwn = ((struct bfa_fcs_rport_s *)rp->rport_drv)->pwwn;
+	lp_wwn = (BFA_LPS_FROM_TAG(lps_mod, rp->rport_info.lp_tag))->pwwn;
+
+	BFA_LPS_FROM_TAG(lps_mod, rp->rport_info.lp_tag)->lun_mask =
+				rp->lun_mask = BFA_FALSE;
+	bfa_fcpim_lunmask_rp_update(bfa, lp_wwn, rp_wwn,
+			BFA_RPORT_TAG_INVALID, BFA_LP_TAG_INVALID);
+}
 
 /*
  * SGPG related functions

drivers/scsi/bfa/bfa_svc.h

@@ -297,6 +297,7 @@ struct bfa_rport_s {
 	void		*rport_drv;	/*  fcs/driver rport object	    */
 	u16	fw_handle;	/*  firmware rport handle	    */
 	u16	rport_tag;	/*  BFA rport tag		    */
+	u8	lun_mask;	/*  LUN mask flag		    */
 	struct bfa_rport_info_s rport_info; /*  rport info from fcs/driver */
 	struct bfa_reqq_wait_s reqq_wait; /*  to wait for room in reqq     */
 	struct bfa_cb_qe_s hcb_qe;	/*  BFA callback qelem		    */
@@ -404,6 +405,7 @@ struct bfa_lps_s {
 	u8		bb_scn;		/*  local BB_SCN		*/
 	u8		lsrjt_rsn;	/*  LSRJT reason		*/
 	u8		lsrjt_expl;	/*  LSRJT explanation		*/
+	u8		lun_mask;	/*  LUN mask flag		*/
 	wwn_t		pwwn;		/*  port wwn of lport		*/
 	wwn_t		nwwn;		/*  node wwn of lport		*/
 	wwn_t		pr_pwwn;	/*  port wwn of lport peer	*/
@@ -573,6 +575,19 @@ void bfa_cb_rport_qos_scn_prio(void *rport,
 			       struct bfa_rport_qos_attr_s old_qos_attr,
 			       struct bfa_rport_qos_attr_s new_qos_attr);
 
+/*
+ *	Rport LUN masking related
+ */
+#define BFA_RPORT_TAG_INVALID	0xffff
+#define BFA_LP_TAG_INVALID	0xff
+void	bfa_rport_set_lunmask(struct bfa_s *bfa, struct bfa_rport_s *rp);
+void	bfa_rport_unset_lunmask(struct bfa_s *bfa, struct bfa_rport_s *rp);
+bfa_boolean_t	bfa_rport_lunmask_active(struct bfa_rport_s *rp);
+wwn_t	bfa_rport_get_pwwn(struct bfa_s *bfa, struct bfa_rport_s *rp);
+struct bfa_rport_s *bfa_rport_get_by_wwn(struct bfa_s *bfa, u16 vf_id,
+					 wwn_t *lpwwn, wwn_t rpwwn);
+void *bfa_cb_get_rp_by_wwn(void *arg, u16 vf_id, wwn_t *lpwwn, wwn_t rpwwn);
+
 /*
  * bfa fcxp API functions
  */