[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.c

@@ -24,6 +24,9 @@ BFA_TRC_FILE(HAL, FCPIM);
  *  BFA ITNIM Related definitions
  */
 static void bfa_itnim_update_del_itn_stats(struct bfa_itnim_s *itnim);
+static bfa_boolean_t bfa_ioim_lm_proc_rpl_data(struct bfa_ioim_s *ioim);
+static bfa_boolean_t bfa_ioim_lm_proc_inq_data(struct bfa_ioim_s *ioim);
+static void bfa_ioim_lm_init(struct bfa_s *bfa);
 
 #define BFA_ITNIM_FROM_TAG(_fcpim, _tag)                                \
 	(((_fcpim)->itnim_arr + ((_tag) & ((_fcpim)->num_itnims - 1))))
@@ -57,6 +60,14 @@ static void bfa_itnim_update_del_itn_stats(struct bfa_itnim_s *itnim);
 	}								\
 } while (0)
 
+#define bfa_ioim_rp_wwn(__ioim)						\
+	(((struct bfa_fcs_rport_s *)					\
+	 (__ioim)->itnim->rport->rport_drv)->pwwn)
+
+#define bfa_ioim_lp_wwn(__ioim)						\
+	((BFA_LPS_FROM_TAG(BFA_LPS_MOD((__ioim)->bfa),			\
+	(__ioim)->itnim->rport->rport_info.lp_tag))->pwwn)		\
+
 #define bfa_itnim_sler_cb(__itnim) do {					\
 	if ((__itnim)->bfa->fcs)					\
 		bfa_cb_itnim_sler((__itnim)->ditn);      \
@@ -66,6 +77,18 @@ static void bfa_itnim_update_del_itn_stats(struct bfa_itnim_s *itnim);
 	}								\
 } while (0)
 
+enum bfa_ioim_lm_status {
+	BFA_IOIM_LM_PRESENT = 1,
+	BFA_IOIM_LM_LUN_NOT_SUP = 2,
+	BFA_IOIM_LM_RPL_DATA_CHANGED = 3,
+	BFA_IOIM_LM_LUN_NOT_RDY = 4,
+};
+
+enum bfa_ioim_lm_ua_status {
+	BFA_IOIM_LM_UA_RESET = 0,
+	BFA_IOIM_LM_UA_SET = 1,
+};
+
 /*
  *  itnim state machine event
  */
@@ -122,6 +145,9 @@ enum bfa_ioim_event {
 	BFA_IOIM_SM_TMDONE	= 16,	/*  IO cleanup from tskim */
 	BFA_IOIM_SM_HWFAIL	= 17,	/*  IOC h/w failure event */
 	BFA_IOIM_SM_IOTOV	= 18,	/*  ITN offline TOV */
+	BFA_IOIM_SM_LM_LUN_NOT_SUP = 19,/*  lunmask lun not supported */
+	BFA_IOIM_SM_LM_RPL_DC = 20,	/*  lunmask report-lun data changed */
+	BFA_IOIM_SM_LM_LUN_NOT_RDY = 21,/*  lunmask lun not ready */
 };
 
 
@@ -219,6 +245,9 @@ static void __bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete);
 static void __bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete);
 static void __bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete);
 static bfa_boolean_t    bfa_ioim_is_abortable(struct bfa_ioim_s *ioim);
+static void __bfa_cb_ioim_lm_lun_not_sup(void *cbarg, bfa_boolean_t complete);
+static void __bfa_cb_ioim_lm_rpl_dc(void *cbarg, bfa_boolean_t complete);
+static void __bfa_cb_ioim_lm_lun_not_rdy(void *cbarg, bfa_boolean_t complete);
 
 /*
  * forward declaration of BFA IO state machine
@@ -416,6 +445,12 @@ bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *lstats,
 	bfa_fcpim_add_iostats(lstats, rstats, output_reqs);
 	bfa_fcpim_add_iostats(lstats, rstats, rd_throughput);
 	bfa_fcpim_add_iostats(lstats, rstats, wr_throughput);
+	bfa_fcpim_add_iostats(lstats, rstats, lm_lun_across_sg);
+	bfa_fcpim_add_iostats(lstats, rstats, lm_lun_not_sup);
+	bfa_fcpim_add_iostats(lstats, rstats, lm_rpl_data_changed);
+	bfa_fcpim_add_iostats(lstats, rstats, lm_wire_residue_changed);
+	bfa_fcpim_add_iostats(lstats, rstats, lm_small_buf_addresidue);
+	bfa_fcpim_add_iostats(lstats, rstats, lm_lun_not_rdy);
 }
 
 bfa_status_t
@@ -1545,6 +1580,27 @@ bfa_ioim_sm_uninit(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
 			__bfa_cb_ioim_abort, ioim);
 		break;
 
+	case BFA_IOIM_SM_LM_LUN_NOT_SUP:
+		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
+		bfa_ioim_move_to_comp_q(ioim);
+		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
+			__bfa_cb_ioim_lm_lun_not_sup, ioim);
+		break;
+
+	case BFA_IOIM_SM_LM_RPL_DC:
+		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
+		bfa_ioim_move_to_comp_q(ioim);
+		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
+				__bfa_cb_ioim_lm_rpl_dc, ioim);
+		break;
+
+	case BFA_IOIM_SM_LM_LUN_NOT_RDY:
+		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
+		bfa_ioim_move_to_comp_q(ioim);
+		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
+			__bfa_cb_ioim_lm_lun_not_rdy, ioim);
+		break;
+
 	default:
 		bfa_sm_fault(ioim->bfa, event);
 	}
@@ -2082,6 +2138,264 @@ bfa_ioim_sm_resfree(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
 	}
 }
 
+/*
+ * This is called from bfa_fcpim_start after the bfa_init() with flash read
+ * is complete by driver. now invalidate the stale content of lun mask
+ * like unit attention, rp tag and lp tag.
+ */
+static void
+bfa_ioim_lm_init(struct bfa_s *bfa)
+{
+	struct bfa_lun_mask_s *lunm_list;
+	int	i;
+
+	if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
+		return;
+
+	lunm_list = bfa_get_lun_mask_list(bfa);
+	for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+		lunm_list[i].ua = BFA_IOIM_LM_UA_RESET;
+		lunm_list[i].lp_tag = BFA_LP_TAG_INVALID;
+		lunm_list[i].rp_tag = BFA_RPORT_TAG_INVALID;
+	}
+}
+
+/*
+ * Validate LUN for LUN masking
+ */
+static enum bfa_ioim_lm_status
+bfa_ioim_lm_check(struct bfa_ioim_s *ioim, struct bfa_lps_s *lps,
+		struct bfa_rport_s *rp, struct scsi_lun lun)
+{
+	u8 i;
+	struct bfa_lun_mask_s *lun_list = bfa_get_lun_mask_list(ioim->bfa);
+	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)ioim->dio;
+	struct scsi_cdb_s *cdb = (struct scsi_cdb_s *)cmnd->cmnd;
+
+	if ((cdb->scsi_cdb[0] == REPORT_LUNS) &&
+	    (scsilun_to_int((struct scsi_lun *)&lun) == 0)) {
+		ioim->proc_rsp_data = bfa_ioim_lm_proc_rpl_data;
+		return BFA_IOIM_LM_PRESENT;
+	}
+
+	for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+
+		if (lun_list[i].state != BFA_IOIM_LUN_MASK_ACTIVE)
+			continue;
+
+		if ((scsilun_to_int((struct scsi_lun *)&lun_list[i].lun) ==
+		    scsilun_to_int((struct scsi_lun *)&lun))
+		    && (rp->rport_tag == lun_list[i].rp_tag)
+		    && ((u8)ioim->itnim->rport->rport_info.lp_tag ==
+						lun_list[i].lp_tag)) {
+			bfa_trc(ioim->bfa, lun_list[i].rp_tag);
+			bfa_trc(ioim->bfa, lun_list[i].lp_tag);
+			bfa_trc(ioim->bfa, scsilun_to_int(
+				(struct scsi_lun *)&lun_list[i].lun));
+
+			if ((lun_list[i].ua == BFA_IOIM_LM_UA_SET) &&
+			    ((cdb->scsi_cdb[0] != INQUIRY) ||
+			    (cdb->scsi_cdb[0] != REPORT_LUNS))) {
+				lun_list[i].ua = BFA_IOIM_LM_UA_RESET;
+				return BFA_IOIM_LM_RPL_DATA_CHANGED;
+			}
+
+			if (cdb->scsi_cdb[0] == REPORT_LUNS)
+				ioim->proc_rsp_data = bfa_ioim_lm_proc_rpl_data;
+
+			return BFA_IOIM_LM_PRESENT;
+		}
+	}
+
+	if ((cdb->scsi_cdb[0] == INQUIRY) &&
+	    (scsilun_to_int((struct scsi_lun *)&lun) == 0)) {
+		ioim->proc_rsp_data = bfa_ioim_lm_proc_inq_data;
+		return BFA_IOIM_LM_PRESENT;
+	}
+
+	if (cdb->scsi_cdb[0] == TEST_UNIT_READY)
+		return BFA_IOIM_LM_LUN_NOT_RDY;
+
+	return BFA_IOIM_LM_LUN_NOT_SUP;
+}
+
+static bfa_boolean_t
+bfa_ioim_lm_proc_rsp_data_dummy(struct bfa_ioim_s *ioim)
+{
+	return BFA_TRUE;
+}
+
+static void
+bfa_ioim_lm_fetch_lun(struct bfa_ioim_s *ioim, u8 *rl_data, int offset,
+		int buf_lun_cnt)
+{
+	struct bfa_lun_mask_s *lun_list = bfa_get_lun_mask_list(ioim->bfa);
+	struct scsi_lun *lun_data = (struct scsi_lun *)(rl_data + offset);
+	struct scsi_lun lun;
+	int i, j;
+
+	bfa_trc(ioim->bfa, buf_lun_cnt);
+	for (j = 0; j < buf_lun_cnt; j++) {
+		lun = *((struct scsi_lun *)(lun_data + j));
+		for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+			if (lun_list[i].state != BFA_IOIM_LUN_MASK_ACTIVE)
+				continue;
+			if ((lun_list[i].rp_wwn == bfa_ioim_rp_wwn(ioim)) &&
+			    (lun_list[i].lp_wwn == bfa_ioim_lp_wwn(ioim)) &&
+			    (scsilun_to_int((struct scsi_lun *)&lun_list[i].lun)
+				== scsilun_to_int((struct scsi_lun *)&lun))) {
+				lun_list[i].state = BFA_IOIM_LUN_MASK_FETCHED;
+				break;
+			}
+		} /* next lun in mask DB */
+	} /* next lun in buf */
+}
+
+static int
+bfa_ioim_lm_update_lun_sg(struct bfa_ioim_s *ioim, u32 *pgdlen,
+		struct scsi_report_luns_data_s *rl)
+{
+	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)ioim->dio;
+	struct scatterlist *sg = scsi_sglist(cmnd);
+	struct bfa_lun_mask_s *lun_list = bfa_get_lun_mask_list(ioim->bfa);
+	struct scsi_lun *prev_rl_data = NULL, *base_rl_data;
+	int i, j, sgeid, lun_fetched_cnt = 0, prev_sg_len = 0, base_count;
+	int lun_across_sg_bytes, bytes_from_next_buf;
+	u64	last_lun, temp_last_lun;
+
+	/* fetch luns from the first sg element */
+	bfa_ioim_lm_fetch_lun(ioim, (u8 *)(rl->lun), 0,
+			(sg_dma_len(sg) / sizeof(struct scsi_lun)) - 1);
+
+	/* fetch luns from multiple sg elements */
+	scsi_for_each_sg(cmnd, sg, scsi_sg_count(cmnd), sgeid) {
+		if (sgeid == 0) {
+			prev_sg_len = sg_dma_len(sg);
+			prev_rl_data = (struct scsi_lun *)
+					phys_to_virt(sg_dma_address(sg));
+			continue;
+		}
+
+		/* if the buf is having more data */
+		lun_across_sg_bytes = prev_sg_len % sizeof(struct scsi_lun);
+		if (lun_across_sg_bytes) {
+			bfa_trc(ioim->bfa, lun_across_sg_bytes);
+			bfa_stats(ioim->itnim, lm_lun_across_sg);
+			bytes_from_next_buf = sizeof(struct scsi_lun) -
+					      lun_across_sg_bytes;
+
+			/* from next buf take higher bytes */
+			temp_last_lun = *((u64 *)
+					  phys_to_virt(sg_dma_address(sg)));
+			last_lun |= temp_last_lun >>
+				    (lun_across_sg_bytes * BITS_PER_BYTE);
+
+			/* from prev buf take higher bytes */
+			temp_last_lun = *((u64 *)(prev_rl_data +
+					  (prev_sg_len - lun_across_sg_bytes)));
+			temp_last_lun >>= bytes_from_next_buf * BITS_PER_BYTE;
+			last_lun = last_lun | (temp_last_lun <<
+				   (bytes_from_next_buf * BITS_PER_BYTE));
+
+			bfa_ioim_lm_fetch_lun(ioim, (u8 *)&last_lun, 0, 1);
+		} else
+			bytes_from_next_buf = 0;
+
+		*pgdlen += sg_dma_len(sg);
+		prev_sg_len = sg_dma_len(sg);
+		prev_rl_data = (struct scsi_lun *)
+				phys_to_virt(sg_dma_address(sg));
+		bfa_ioim_lm_fetch_lun(ioim, (u8 *)prev_rl_data,
+				bytes_from_next_buf,
+				sg_dma_len(sg) / sizeof(struct scsi_lun));
+	}
+
+	/* update the report luns data - based on fetched luns */
+	sg = scsi_sglist(cmnd);
+	base_rl_data = (struct scsi_lun *)rl->lun;
+	base_count = (sg_dma_len(sg) / sizeof(struct scsi_lun)) - 1;
+	for (i = 0, j = 0; i < MAX_LUN_MASK_CFG; i++) {
+		if (lun_list[i].state == BFA_IOIM_LUN_MASK_FETCHED) {
+			base_rl_data[j] = lun_list[i].lun;
+			lun_list[i].state = BFA_IOIM_LUN_MASK_ACTIVE;
+			j++;
+			lun_fetched_cnt++;
+		}
+
+		if (j > base_count) {
+			j = 0;
+			sg = sg_next(sg);
+			base_rl_data = (struct scsi_lun *)
+					phys_to_virt(sg_dma_address(sg));
+			base_count = sg_dma_len(sg) / sizeof(struct scsi_lun);
+		}
+	}
+
+	bfa_trc(ioim->bfa, lun_fetched_cnt);
+	return lun_fetched_cnt;
+}
+
+static bfa_boolean_t
+bfa_ioim_lm_proc_inq_data(struct bfa_ioim_s *ioim)
+{
+	struct scsi_inquiry_data_s *inq;
+	struct scatterlist *sg = scsi_sglist((struct scsi_cmnd *)ioim->dio);
+
+	ioim->proc_rsp_data = bfa_ioim_lm_proc_rsp_data_dummy;
+	inq = (struct scsi_inquiry_data_s *)phys_to_virt(sg_dma_address(sg));
+
+	bfa_trc(ioim->bfa, inq->device_type);
+	inq->peripheral_qual = SCSI_INQ_PQ_NOT_CON;
+	return 0;
+}
+
+static bfa_boolean_t
+bfa_ioim_lm_proc_rpl_data(struct bfa_ioim_s *ioim)
+{
+	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)ioim->dio;
+	struct scatterlist *sg = scsi_sglist(cmnd);
+	struct bfi_ioim_rsp_s *m;
+	struct scsi_report_luns_data_s *rl = NULL;
+	int lun_count = 0, lun_fetched_cnt = 0;
+	u32 residue, pgdlen = 0;
+
+	ioim->proc_rsp_data = bfa_ioim_lm_proc_rsp_data_dummy;
+	if (bfa_get_lun_mask_status(ioim->bfa) != BFA_LUNMASK_ENABLED)
+		return BFA_TRUE;
+
+	m = (struct bfi_ioim_rsp_s *) &ioim->iosp->comp_rspmsg;
+	if (m->scsi_status == SCSI_STATUS_CHECK_CONDITION)
+		return BFA_TRUE;
+
+	pgdlen = sg_dma_len(sg);
+	bfa_trc(ioim->bfa, pgdlen);
+	rl = (struct scsi_report_luns_data_s *)phys_to_virt(sg_dma_address(sg));
+	lun_count = cpu_to_be32(rl->lun_list_length) / sizeof(struct scsi_lun);
+	lun_fetched_cnt = bfa_ioim_lm_update_lun_sg(ioim, &pgdlen, rl);
+
+	if (lun_count == lun_fetched_cnt)
+		return BFA_TRUE;
+
+	bfa_trc(ioim->bfa, lun_count);
+	bfa_trc(ioim->bfa, lun_fetched_cnt);
+	bfa_trc(ioim->bfa, be32_to_cpu(rl->lun_list_length));
+
+	if (be32_to_cpu(rl->lun_list_length) <= pgdlen)
+		rl->lun_list_length = be32_to_cpu(lun_fetched_cnt) *
+				      sizeof(struct scsi_lun);
+	else
+		bfa_stats(ioim->itnim, lm_small_buf_addresidue);
+
+	bfa_trc(ioim->bfa, be32_to_cpu(rl->lun_list_length));
+	bfa_trc(ioim->bfa, be32_to_cpu(m->residue));
+
+	residue = be32_to_cpu(m->residue);
+	residue += (lun_count - lun_fetched_cnt) * sizeof(struct scsi_lun);
+	bfa_stats(ioim->itnim, lm_wire_residue_changed);
+	m->residue = be32_to_cpu(residue);
+	bfa_trc(ioim->bfa, ioim->nsges);
+	return BFA_FALSE;
+}
 
 static void
 __bfa_cb_ioim_good_comp(void *cbarg, bfa_boolean_t complete)
@@ -2140,6 +2454,105 @@ __bfa_cb_ioim_comp(void *cbarg, bfa_boolean_t complete)
 			  m->scsi_status, sns_len, snsinfo, residue);
 }
 
+static void
+__bfa_cb_ioim_lm_lun_not_sup(void *cbarg, bfa_boolean_t complete)
+{
+	struct bfa_ioim_s *ioim = cbarg;
+	int sns_len = 0xD;
+	u32 residue = scsi_bufflen((struct scsi_cmnd *)ioim->dio);
+	struct scsi_sense_s *snsinfo;
+
+	if (!complete) {
+		bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
+		return;
+	}
+
+	snsinfo = (struct scsi_sense_s *)BFA_SNSINFO_FROM_TAG(
+					ioim->fcpim->fcp, ioim->iotag);
+	snsinfo->rsp_code = SCSI_SENSE_CUR_ERR;
+	snsinfo->add_sense_length = 0xa;
+	snsinfo->asc = SCSI_ASC_LUN_NOT_SUPPORTED;
+	snsinfo->sense_key = ILLEGAL_REQUEST;
+	bfa_trc(ioim->bfa, residue);
+	bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_OK,
+			SCSI_STATUS_CHECK_CONDITION, sns_len,
+			(u8 *)snsinfo, residue);
+}
+
+static void
+__bfa_cb_ioim_lm_rpl_dc(void *cbarg, bfa_boolean_t complete)
+{
+	struct bfa_ioim_s *ioim = cbarg;
+	int sns_len = 0xD;
+	u32 residue = scsi_bufflen((struct scsi_cmnd *)ioim->dio);
+	struct scsi_sense_s *snsinfo;
+
+	if (!complete) {
+		bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
+		return;
+	}
+
+	snsinfo = (struct scsi_sense_s *)BFA_SNSINFO_FROM_TAG(ioim->fcpim->fcp,
+						       ioim->iotag);
+	snsinfo->rsp_code = SCSI_SENSE_CUR_ERR;
+	snsinfo->sense_key = SCSI_MP_IEC_UNIT_ATTN;
+	snsinfo->asc = SCSI_ASC_TOCC;
+	snsinfo->add_sense_length = 0x6;
+	snsinfo->ascq = SCSI_ASCQ_RL_DATA_CHANGED;
+	bfa_trc(ioim->bfa, residue);
+	bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_OK,
+			SCSI_STATUS_CHECK_CONDITION, sns_len,
+			(u8 *)snsinfo, residue);
+}
+
+static void
+__bfa_cb_ioim_lm_lun_not_rdy(void *cbarg, bfa_boolean_t complete)
+{
+	struct bfa_ioim_s *ioim = cbarg;
+	int sns_len = 0xD;
+	u32 residue = scsi_bufflen((struct scsi_cmnd *)ioim->dio);
+	struct scsi_sense_s *snsinfo;
+
+	if (!complete) {
+		bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
+		return;
+	}
+
+	snsinfo = (struct scsi_sense_s *)BFA_SNSINFO_FROM_TAG(
+					ioim->fcpim->fcp, ioim->iotag);
+	snsinfo->rsp_code = SCSI_SENSE_CUR_ERR;
+	snsinfo->add_sense_length = 0xa;
+	snsinfo->sense_key = NOT_READY;
+	snsinfo->asc = SCSI_ASC_LUN_NOT_READY;
+	snsinfo->ascq = SCSI_ASCQ_MAN_INTR_REQ;
+	bfa_trc(ioim->bfa, residue);
+	bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_OK,
+			SCSI_STATUS_CHECK_CONDITION, sns_len,
+			(u8 *)snsinfo, residue);
+}
+
+void
+bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn, wwn_t rp_wwn,
+			u16 rp_tag, u8 lp_tag)
+{
+	struct bfa_lun_mask_s *lun_list;
+	u8	i;
+
+	if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
+		return;
+
+	lun_list = bfa_get_lun_mask_list(bfa);
+	for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+		if (lun_list[i].state == BFA_IOIM_LUN_MASK_ACTIVE) {
+			if ((lun_list[i].lp_wwn == lp_wwn) &&
+			    (lun_list[i].rp_wwn == rp_wwn)) {
+				lun_list[i].rp_tag = rp_tag;
+				lun_list[i].lp_tag = lp_tag;
+			}
+		}
+	}
+}
+
 static void
 __bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete)
 {
@@ -2150,6 +2563,7 @@ __bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete)
 		return;
 	}
 
+	ioim->proc_rsp_data = bfa_ioim_lm_proc_rsp_data_dummy;
 	bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_ABORTED,
 			  0, 0, NULL, 0);
 }
@@ -2165,6 +2579,7 @@ __bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete)
 		return;
 	}
 
+	ioim->proc_rsp_data = bfa_ioim_lm_proc_rsp_data_dummy;
 	bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_PATHTOV,
 			  0, 0, NULL, 0);
 }
@@ -2179,6 +2594,7 @@ __bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete)
 		return;
 	}
 
+	ioim->proc_rsp_data = bfa_ioim_lm_proc_rsp_data_dummy;
 	bfa_cb_ioim_abort(ioim->bfa->bfad, ioim->dio);
 }
 
@@ -2522,6 +2938,7 @@ bfa_ioim_attach(struct bfa_fcpim_s *fcpim)
 		ioim->bfa     = fcpim->bfa;
 		ioim->fcpim   = fcpim;
 		ioim->iosp    = iosp;
+		ioim->proc_rsp_data = bfa_ioim_lm_proc_rsp_data_dummy;
 		INIT_LIST_HEAD(&ioim->sgpg_q);
 		bfa_reqq_winit(&ioim->iosp->reqq_wait,
 				   bfa_ioim_qresume, ioim);
@@ -2559,6 +2976,7 @@ bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 			evt = BFA_IOIM_SM_DONE;
 		else
 			evt = BFA_IOIM_SM_COMP;
+		ioim->proc_rsp_data(ioim);
 		break;
 
 	case BFI_IOIM_STS_TIMEDOUT:
@@ -2594,6 +3012,7 @@ bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 		if (rsp->abort_tag != ioim->abort_tag) {
 			bfa_trc(ioim->bfa, rsp->abort_tag);
 			bfa_trc(ioim->bfa, ioim->abort_tag);
+			ioim->proc_rsp_data = bfa_ioim_lm_proc_rsp_data_dummy;
 			return;
 		}
 
@@ -2612,6 +3031,7 @@ bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 		WARN_ON(1);
 	}
 
+	ioim->proc_rsp_data = bfa_ioim_lm_proc_rsp_data_dummy;
 	bfa_sm_send_event(ioim, evt);
 }
 
@@ -2629,7 +3049,16 @@ bfa_ioim_good_comp_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 	WARN_ON(BFA_IOIM_TAG_2_ID(ioim->iotag) != iotag);
 
 	bfa_ioim_cb_profile_comp(fcpim, ioim);
+
+	if (bfa_get_lun_mask_status(bfa) != BFA_LUNMASK_ENABLED)  {
+		bfa_sm_send_event(ioim, BFA_IOIM_SM_COMP_GOOD);
+		return;
+	}
+
+	if (ioim->proc_rsp_data(ioim) == BFA_TRUE)
 		bfa_sm_send_event(ioim, BFA_IOIM_SM_COMP_GOOD);
+	else
+		bfa_sm_send_event(ioim, BFA_IOIM_SM_COMP);
 }
 
 /*
@@ -2741,6 +3170,35 @@ bfa_ioim_free(struct bfa_ioim_s *ioim)
 void
 bfa_ioim_start(struct bfa_ioim_s *ioim)
 {
+	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)ioim->dio;
+	struct bfa_lps_s	*lps;
+	enum bfa_ioim_lm_status status;
+	struct scsi_lun scsilun;
+
+	if (bfa_get_lun_mask_status(ioim->bfa) == BFA_LUNMASK_ENABLED) {
+		lps = BFA_IOIM_TO_LPS(ioim);
+		int_to_scsilun(cmnd->device->lun, &scsilun);
+		status = bfa_ioim_lm_check(ioim, lps,
+				ioim->itnim->rport, scsilun);
+		if (status == BFA_IOIM_LM_LUN_NOT_RDY) {
+			bfa_sm_send_event(ioim, BFA_IOIM_SM_LM_LUN_NOT_RDY);
+			bfa_stats(ioim->itnim, lm_lun_not_rdy);
+			return;
+		}
+
+		if (status == BFA_IOIM_LM_LUN_NOT_SUP) {
+			bfa_sm_send_event(ioim, BFA_IOIM_SM_LM_LUN_NOT_SUP);
+			bfa_stats(ioim->itnim, lm_lun_not_sup);
+			return;
+		}
+
+		if (status == BFA_IOIM_LM_RPL_DATA_CHANGED) {
+			bfa_sm_send_event(ioim, BFA_IOIM_SM_LM_RPL_DC);
+			bfa_stats(ioim->itnim, lm_rpl_data_changed);
+			return;
+		}
+	}
+
 	bfa_ioim_cb_profile_start(ioim->fcpim, ioim);
 
 	/*
@@ -3484,6 +3942,13 @@ bfa_fcp_detach(struct bfa_s *bfa)
 static void
 bfa_fcp_start(struct bfa_s *bfa)
 {
+	struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);
+
+	/*
+	 * bfa_init() with flash read is complete. now invalidate the stale
+	 * content of lun mask like unit attention, rp tag and lp tag.
+	 */
+	bfa_ioim_lm_init(fcp->bfa);
 }
 
 static void

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
  */