[SCSI] bfa: Added support to configure lunmasking

- Added support to enable / disable lunmasking on Brocade adapter ports.
- Added support to query / clear lunmasking configuration.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 194 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c
index e601f178c5a6..e07bd4745d8b 100644
--- a/drivers/scsi/bfa/bfa_fcpim.c
+++ b/drivers/scsi/bfa/bfa_fcpim.c
@@ -2553,6 +2553,200 @@ bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn, wwn_t rp_wwn,
         }
 }
 
+/*
+ * set UA for all active luns in LM DB
+ */
+static void
+bfa_ioim_lm_set_ua(struct bfa_s *bfa)
+{
+        struct bfa_lun_mask_s   *lunm_list;
+        int     i;
+
+        lunm_list = bfa_get_lun_mask_list(bfa);
+        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+                if (lunm_list[i].state != BFA_IOIM_LUN_MASK_ACTIVE)
+                        continue;
+                lunm_list[i].ua = BFA_IOIM_LM_UA_SET;
+        }
+}
+
+bfa_status_t
+bfa_fcpim_lunmask_update(struct bfa_s *bfa, u32 update)
+{
+        struct bfa_lunmask_cfg_s        *lun_mask;
+
+        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
+        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
+                return BFA_STATUS_FAILED;
+
+        if (bfa_get_lun_mask_status(bfa) == update)
+                return BFA_STATUS_NO_CHANGE;
+
+        lun_mask = bfa_get_lun_mask(bfa);
+        lun_mask->status = update;
+
+        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_ENABLED)
+                bfa_ioim_lm_set_ua(bfa);
+
+        return  bfa_dconf_update(bfa);
+}
+
+bfa_status_t
+bfa_fcpim_lunmask_clear(struct bfa_s *bfa)
+{
+        int i;
+        struct bfa_lun_mask_s   *lunm_list;
+
+        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
+        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
+                return BFA_STATUS_FAILED;
+
+        lunm_list = bfa_get_lun_mask_list(bfa);
+        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+                if (lunm_list[i].state == BFA_IOIM_LUN_MASK_ACTIVE) {
+                        if (lunm_list[i].rp_tag != BFA_RPORT_TAG_INVALID)
+                                bfa_rport_unset_lunmask(bfa,
+                                  BFA_RPORT_FROM_TAG(bfa, lunm_list[i].rp_tag));
+                }
+        }
+
+        memset(lunm_list, 0, sizeof(struct bfa_lun_mask_s) * MAX_LUN_MASK_CFG);
+        return bfa_dconf_update(bfa);
+}
+
+bfa_status_t
+bfa_fcpim_lunmask_query(struct bfa_s *bfa, void *buf)
+{
+        struct bfa_lunmask_cfg_s *lun_mask;
+
+        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
+        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
+                return BFA_STATUS_FAILED;
+
+        lun_mask = bfa_get_lun_mask(bfa);
+        memcpy(buf, lun_mask, sizeof(struct bfa_lunmask_cfg_s));
+        return BFA_STATUS_OK;
+}
+
+bfa_status_t
+bfa_fcpim_lunmask_add(struct bfa_s *bfa, u16 vf_id, wwn_t *pwwn,
+                      wwn_t rpwwn, struct scsi_lun lun)
+{
+        struct bfa_lun_mask_s *lunm_list;
+        struct bfa_rport_s *rp = NULL;
+        int i, free_index = MAX_LUN_MASK_CFG + 1;
+        struct bfa_fcs_lport_s *port = NULL;
+        struct bfa_fcs_rport_s *rp_fcs;
+
+        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
+        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
+                return BFA_STATUS_FAILED;
+
+        port = bfa_fcs_lookup_port(&((struct bfad_s *)bfa->bfad)->bfa_fcs,
+                                   vf_id, *pwwn);
+        if (port) {
+                *pwwn = port->port_cfg.pwwn;
+                rp_fcs = bfa_fcs_lport_get_rport_by_pwwn(port, rpwwn);
+                rp = rp_fcs->bfa_rport;
+        }
+
+        lunm_list = bfa_get_lun_mask_list(bfa);
+        /* if entry exists */
+        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+                if (lunm_list[i].state != BFA_IOIM_LUN_MASK_ACTIVE)
+                        free_index = i;
+                if ((lunm_list[i].lp_wwn == *pwwn) &&
+                    (lunm_list[i].rp_wwn == rpwwn) &&
+                    (scsilun_to_int((struct scsi_lun *)&lunm_list[i].lun) ==
+                     scsilun_to_int((struct scsi_lun *)&lun)))
+                        return  BFA_STATUS_ENTRY_EXISTS;
+        }
+
+        if (free_index > MAX_LUN_MASK_CFG)
+                return BFA_STATUS_MAX_ENTRY_REACHED;
+
+        if (rp) {
+                lunm_list[free_index].lp_tag = bfa_lps_get_tag_from_pid(bfa,
+                                                   rp->rport_info.local_pid);
+                lunm_list[free_index].rp_tag = rp->rport_tag;
+        } else {
+                lunm_list[free_index].lp_tag = BFA_LP_TAG_INVALID;
+                lunm_list[free_index].rp_tag = BFA_RPORT_TAG_INVALID;
+        }
+
+        lunm_list[free_index].lp_wwn = *pwwn;
+        lunm_list[free_index].rp_wwn = rpwwn;
+        lunm_list[free_index].lun = lun;
+        lunm_list[free_index].state = BFA_IOIM_LUN_MASK_ACTIVE;
+
+        /* set for all luns in this rp */
+        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+                if ((lunm_list[i].lp_wwn == *pwwn) &&
+                    (lunm_list[i].rp_wwn == rpwwn))
+                        lunm_list[i].ua = BFA_IOIM_LM_UA_SET;
+        }
+
+        return bfa_dconf_update(bfa);
+}
+
+bfa_status_t
+bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id, wwn_t *pwwn,
+                         wwn_t rpwwn, struct scsi_lun lun)
+{
+        struct bfa_lun_mask_s   *lunm_list;
+        struct bfa_rport_s      *rp = NULL;
+        struct bfa_fcs_lport_s *port = NULL;
+        struct bfa_fcs_rport_s *rp_fcs;
+        int     i;
+
+        /* in min cfg lunm_list could be NULL but  no commands should run. */
+        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
+                return BFA_STATUS_FAILED;
+
+        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
+        bfa_trc(bfa, *pwwn);
+        bfa_trc(bfa, rpwwn);
+        bfa_trc(bfa, scsilun_to_int((struct scsi_lun *)&lun));
+
+        if (*pwwn == 0) {
+                port = bfa_fcs_lookup_port(
+                                &((struct bfad_s *)bfa->bfad)->bfa_fcs,
+                                vf_id, *pwwn);
+                if (port) {
+                        *pwwn = port->port_cfg.pwwn;
+                        rp_fcs = bfa_fcs_lport_get_rport_by_pwwn(port, rpwwn);
+                        rp = rp_fcs->bfa_rport;
+                }
+        }
+
+        lunm_list = bfa_get_lun_mask_list(bfa);
+        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+                if ((lunm_list[i].lp_wwn == *pwwn) &&
+                    (lunm_list[i].rp_wwn == rpwwn) &&
+                    (scsilun_to_int((struct scsi_lun *)&lunm_list[i].lun) ==
+                     scsilun_to_int((struct scsi_lun *)&lun))) {
+                        lunm_list[i].lp_wwn = 0;
+                        lunm_list[i].rp_wwn = 0;
+                        int_to_scsilun(0, &lunm_list[i].lun);
+                        lunm_list[i].state = BFA_IOIM_LUN_MASK_INACTIVE;
+                        if (lunm_list[i].rp_tag != BFA_RPORT_TAG_INVALID) {
+                                lunm_list[i].rp_tag = BFA_RPORT_TAG_INVALID;
+                                lunm_list[i].lp_tag = BFA_LP_TAG_INVALID;
+                        }
+                        return bfa_dconf_update(bfa);
+                }
+        }
+
+        /* set for all luns in this rp */
+        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
+                if ((lunm_list[i].lp_wwn == *pwwn) &&
+                    (lunm_list[i].rp_wwn == rpwwn))
+                        lunm_list[i].ua = BFA_IOIM_LM_UA_SET;
+        }
+
+        return BFA_STATUS_ENTRY_NOT_EXISTS;
+}
+
 static void
 __bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete)
 {