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path: root/drivers/scsi/lpfc/lpfc_hbadisc.c
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Diffstat (limited to 'drivers/scsi/lpfc/lpfc_hbadisc.c')
-rw-r--r--drivers/scsi/lpfc/lpfc_hbadisc.c79
1 files changed, 73 insertions, 6 deletions
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index e1466eec56b7..1f87b4fb8b50 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -475,6 +475,10 @@ lpfc_work_list_done(struct lpfc_hba *phba)
lpfc_send_fastpath_evt(phba, evtp);
free_evt = 0;
break;
+ case LPFC_EVT_RESET_HBA:
+ if (!(phba->pport->load_flag & FC_UNLOADING))
+ lpfc_reset_hba(phba);
+ break;
}
if (free_evt)
kfree(evtp);
@@ -1531,7 +1535,37 @@ lpfc_check_pending_fcoe_event(struct lpfc_hba *phba, uint8_t unreg_fcf)
}
/**
- * lpfc_sli4_fcf_rec_mbox_parse - parse non-embedded fcf record mailbox command
+ * lpfc_sli4_new_fcf_random_select - Randomly select an eligible new fcf record
+ * @phba: pointer to lpfc hba data structure.
+ * @fcf_cnt: number of eligible fcf record seen so far.
+ *
+ * This function makes an running random selection decision on FCF record to
+ * use through a sequence of @fcf_cnt eligible FCF records with equal
+ * probability. To perform integer manunipulation of random numbers with
+ * size unit32_t, the lower 16 bits of the 32-bit random number returned
+ * from random32() are taken as the random random number generated.
+ *
+ * Returns true when outcome is for the newly read FCF record should be
+ * chosen; otherwise, return false when outcome is for keeping the previously
+ * chosen FCF record.
+ **/
+static bool
+lpfc_sli4_new_fcf_random_select(struct lpfc_hba *phba, uint32_t fcf_cnt)
+{
+ uint32_t rand_num;
+
+ /* Get 16-bit uniform random number */
+ rand_num = (0xFFFF & random32());
+
+ /* Decision with probability 1/fcf_cnt */
+ if ((fcf_cnt * rand_num) < 0xFFFF)
+ return true;
+ else
+ return false;
+}
+
+/**
+ * lpfc_mbx_cmpl_read_fcf_record - Completion handler for read_fcf mbox.
* @phba: pointer to lpfc hba data structure.
* @mboxq: pointer to mailbox object.
* @next_fcf_index: pointer to holder of next fcf index.
@@ -1592,7 +1626,9 @@ lpfc_sli4_fcf_rec_mbox_parse(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq,
new_fcf_record = (struct fcf_record *)(virt_addr +
sizeof(struct lpfc_mbx_read_fcf_tbl));
lpfc_sli_pcimem_bcopy(new_fcf_record, new_fcf_record,
- sizeof(struct fcf_record));
+ offsetof(struct fcf_record, vlan_bitmap));
+ new_fcf_record->word137 = le32_to_cpu(new_fcf_record->word137);
+ new_fcf_record->word138 = le32_to_cpu(new_fcf_record->word138);
return new_fcf_record;
}
@@ -1679,6 +1715,8 @@ lpfc_mbx_cmpl_fcf_scan_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
uint16_t fcf_index, next_fcf_index;
struct lpfc_fcf_rec *fcf_rec = NULL;
uint16_t vlan_id;
+ uint32_t seed;
+ bool select_new_fcf;
int rc;
/* If there is pending FCoE event restart FCF table scan */
@@ -1809,9 +1847,21 @@ lpfc_mbx_cmpl_fcf_scan_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
* than the driver FCF record, use the new record.
*/
if (new_fcf_record->fip_priority < fcf_rec->priority) {
- /* Choose this FCF record */
+ /* Choose the new FCF record with lower priority */
__lpfc_update_fcf_record(phba, fcf_rec, new_fcf_record,
addr_mode, vlan_id, 0);
+ /* Reset running random FCF selection count */
+ phba->fcf.eligible_fcf_cnt = 1;
+ } else if (new_fcf_record->fip_priority == fcf_rec->priority) {
+ /* Update running random FCF selection count */
+ phba->fcf.eligible_fcf_cnt++;
+ select_new_fcf = lpfc_sli4_new_fcf_random_select(phba,
+ phba->fcf.eligible_fcf_cnt);
+ if (select_new_fcf)
+ /* Choose the new FCF by random selection */
+ __lpfc_update_fcf_record(phba, fcf_rec,
+ new_fcf_record,
+ addr_mode, vlan_id, 0);
}
spin_unlock_irq(&phba->hbalock);
goto read_next_fcf;
@@ -1825,6 +1875,11 @@ lpfc_mbx_cmpl_fcf_scan_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
addr_mode, vlan_id, (boot_flag ?
BOOT_ENABLE : 0));
phba->fcf.fcf_flag |= FCF_AVAILABLE;
+ /* Setup initial running random FCF selection count */
+ phba->fcf.eligible_fcf_cnt = 1;
+ /* Seeding the random number generator for random selection */
+ seed = (uint32_t)(0xFFFFFFFF & jiffies);
+ srandom32(seed);
}
spin_unlock_irq(&phba->hbalock);
goto read_next_fcf;
@@ -2686,11 +2741,18 @@ lpfc_mbx_cmpl_unreg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
switch (mb->mbxStatus) {
case 0x0011:
case 0x0020:
- case 0x9700:
lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
"0911 cmpl_unreg_vpi, mb status = 0x%x\n",
mb->mbxStatus);
break;
+ /* If VPI is busy, reset the HBA */
+ case 0x9700:
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
+ "2798 Unreg_vpi failed vpi 0x%x, mb status = 0x%x\n",
+ vport->vpi, mb->mbxStatus);
+ if (!(phba->pport->load_flag & FC_UNLOADING))
+ lpfc_workq_post_event(phba, NULL, NULL,
+ LPFC_EVT_RESET_HBA);
}
spin_lock_irq(shost->host_lock);
vport->vpi_state &= ~LPFC_VPI_REGISTERED;
@@ -2965,7 +3027,12 @@ lpfc_mbx_cmpl_fabric_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
- lpfc_start_fdiscs(phba);
+ /* when physical port receive logo donot start
+ * vport discovery */
+ if (!(vport->fc_flag & FC_LOGO_RCVD_DID_CHNG))
+ lpfc_start_fdiscs(phba);
+ else
+ vport->fc_flag &= ~FC_LOGO_RCVD_DID_CHNG ;
lpfc_do_scr_ns_plogi(phba, vport);
}
@@ -3177,7 +3244,6 @@ lpfc_nlp_state_cleanup(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
if (new_state == NLP_STE_UNMAPPED_NODE) {
- ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
ndlp->nlp_type |= NLP_FC_NODE;
}
@@ -4935,6 +5001,7 @@ lpfc_unregister_fcf_prep(struct lpfc_hba *phba)
ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
if (ndlp)
lpfc_cancel_retry_delay_tmo(vports[i], ndlp);
+ lpfc_cleanup_pending_mbox(vports[i]);
lpfc_mbx_unreg_vpi(vports[i]);
shost = lpfc_shost_from_vport(vports[i]);
spin_lock_irq(shost->host_lock);