5 files changed, 69 insertions, 6 deletions

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index de6cd57dc7f6..763f32dd2d23 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -99,6 +99,7 @@ struct lpfc_sli2_slim;
 #define FC_MAX_ADPTMSG          64
 
 #define MAX_HBAEVT      32
+#define MAX_HBAS_NO_RESET 16
 
 /* Number of MSI-X vectors the driver uses */
 #define LPFC_MSIX_VECTORS       2
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 4114cf4308d0..b741dcb8ee64 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -3010,6 +3010,12 @@ MODULE_PARM_DESC(lpfc_poll, "FCP ring polling mode control:"
 static DEVICE_ATTR(lpfc_poll, S_IRUGO | S_IWUSR,
                    lpfc_poll_show, lpfc_poll_store);
 
+int lpfc_no_hba_reset_cnt;
+unsigned long lpfc_no_hba_reset[MAX_HBAS_NO_RESET] = {
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+module_param_array(lpfc_no_hba_reset, ulong, &lpfc_no_hba_reset_cnt, 0444);
+MODULE_PARM_DESC(lpfc_no_hba_reset, "WWPN of HBAs that should not be reset");
+
 LPFC_ATTR(sli_mode, 0, 0, 3,
         "SLI mode selector:"
         " 0 - auto (SLI-3 if supported),"
diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index 843dd73004da..54e6ac42fbcd 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -384,7 +384,7 @@ void lpfc_free_sysfs_attr(struct lpfc_vport *);
 extern struct device_attribute *lpfc_hba_attrs[];
 extern struct device_attribute *lpfc_vport_attrs[];
 extern struct scsi_host_template lpfc_template;
-extern struct scsi_host_template lpfc_template_s3;
+extern struct scsi_host_template lpfc_template_no_hr;
 extern struct scsi_host_template lpfc_template_nvme;
 extern struct scsi_host_template lpfc_vport_template;
 extern struct fc_function_template lpfc_transport_functions;
@@ -554,3 +554,5 @@ void lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba,
                                 struct lpfc_wcqe_complete *abts_cmpl);
 extern int lpfc_enable_nvmet_cnt;
 extern unsigned long long lpfc_enable_nvmet[];
+extern int lpfc_no_hba_reset_cnt;
+extern unsigned long lpfc_no_hba_reset[];
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index a0cba631869e..4fa21a9fd883 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -3555,6 +3555,44 @@ out_free_mem:
         return rc;
 }
 
+static uint64_t
+lpfc_get_wwpn(struct lpfc_hba *phba)
+{
+        uint64_t wwn;
+        int rc;
+        LPFC_MBOXQ_t *mboxq;
+        MAILBOX_t *mb;
+
+
+        mboxq = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
+                                                GFP_KERNEL);
+        if (!mboxq)
+                return (uint64_t)-1;
+
+        /* First get WWN of HBA instance */
+        lpfc_read_nv(phba, mboxq);
+        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
+        if (rc != MBX_SUCCESS) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+                                "6019 Mailbox failed , mbxCmd x%x "
+                                "READ_NV, mbxStatus x%x\n",
+                                bf_get(lpfc_mqe_command, &mboxq->u.mqe),
+                                bf_get(lpfc_mqe_status, &mboxq->u.mqe));
+                mempool_free(mboxq, phba->mbox_mem_pool);
+                return (uint64_t) -1;
+        }
+        mb = &mboxq->u.mb;
+        memcpy(&wwn, (char *)mb->un.varRDnvp.portname, sizeof(uint64_t));
+        /* wwn is WWPN of HBA instance */
+        mempool_free(mboxq, phba->mbox_mem_pool);
+        if (phba->sli_rev == LPFC_SLI_REV4)
+                return be64_to_cpu(wwn);
+        else
+                return (((wwn & 0xffffffff00000000) >> 32) |
+                        ((wwn & 0x00000000ffffffff) << 32));
+
+}
+
 /**
  * lpfc_sli4_nvme_sgl_update - update xri-sgl sizing and mapping
  * @phba: pointer to lpfc hba data structure.
@@ -3676,17 +3714,32 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
         struct lpfc_vport *vport;
         struct Scsi_Host  *shost = NULL;
         int error = 0;
+        int i;
+        uint64_t wwn;
+        bool use_no_reset_hba = false;
+
+        wwn = lpfc_get_wwpn(phba);
+
+        for (i = 0; i < lpfc_no_hba_reset_cnt; i++) {
+                if (wwn == lpfc_no_hba_reset[i]) {
+                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+                                        "6020 Setting use_no_reset port=%llx\n",
+                                        wwn);
+                        use_no_reset_hba = true;
+                        break;
+                }
+        }
 
         if (phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP) {
                 if (dev != &phba->pcidev->dev) {
                         shost = scsi_host_alloc(&lpfc_vport_template,
                                                 sizeof(struct lpfc_vport));
                 } else {
-                        if (phba->sli_rev == LPFC_SLI_REV4)
+                        if (!use_no_reset_hba)
                                 shost = scsi_host_alloc(&lpfc_template,
                                                 sizeof(struct lpfc_vport));
                         else
-                                shost = scsi_host_alloc(&lpfc_template_s3,
+                                shost = scsi_host_alloc(&lpfc_template_no_hr,
                                                 sizeof(struct lpfc_vport));
                 }
         } else if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME) {
@@ -5472,7 +5525,8 @@ lpfc_sli_driver_resource_setup(struct lpfc_hba *phba)
 
         /* Initialize the host templates the configured values. */
         lpfc_vport_template.sg_tablesize = phba->cfg_sg_seg_cnt;
-        lpfc_template_s3.sg_tablesize = phba->cfg_sg_seg_cnt;
+        lpfc_template_no_hr.sg_tablesize = phba->cfg_sg_seg_cnt;
+        lpfc_template.sg_tablesize = phba->cfg_sg_seg_cnt;
 
         /* There are going to be 2 reserved BDEs: 1 FCP cmnd + 1 FCP rsp */
         if (phba->cfg_enable_bg) {
@@ -5693,6 +5747,7 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
         /* Initialize the host templates with the updated values. */
         lpfc_vport_template.sg_tablesize = phba->cfg_sg_seg_cnt;
         lpfc_template.sg_tablesize = phba->cfg_sg_seg_cnt;
+        lpfc_template_no_hr.sg_tablesize = phba->cfg_sg_seg_cnt;
 
         if (phba->cfg_sg_dma_buf_size  <= LPFC_MIN_SG_SLI4_BUF_SZ)
                 phba->cfg_sg_dma_buf_size = LPFC_MIN_SG_SLI4_BUF_SZ;
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 9d6384af9fce..bcfd6d6ab16d 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -5953,7 +5953,7 @@ struct scsi_host_template lpfc_template_nvme = {
         .track_queue_depth      = 0,
 };
 
-struct scsi_host_template lpfc_template_s3 = {
+struct scsi_host_template lpfc_template_no_hr = {
         .module                 = THIS_MODULE,
         .name                   = LPFC_DRIVER_NAME,
         .proc_name              = LPFC_DRIVER_NAME,
@@ -6015,7 +6015,6 @@ struct scsi_host_template lpfc_vport_template = {
         .eh_abort_handler       = lpfc_abort_handler,
         .eh_device_reset_handler = lpfc_device_reset_handler,
         .eh_target_reset_handler = lpfc_target_reset_handler,
-        .eh_bus_reset_handler   = lpfc_bus_reset_handler,
         .slave_alloc            = lpfc_slave_alloc,
         .slave_configure        = lpfc_slave_configure,
         .slave_destroy          = lpfc_slave_destroy,