This patch continues the libefc library population.
This patch adds library interface definitions for:
- SLI and FC port (aka n_port_id) registration, allocation and
deallocation.
Co-developed-by: Ram Vegesna <ram.vegesna@xxxxxxxxxxxx>
Signed-off-by: Ram Vegesna <ram.vegesna@xxxxxxxxxxxx>
Signed-off-by: James Smart <jsmart2021@xxxxxxxxx>
---
drivers/scsi/elx/libefc/efc_nport.c | 794 ++++++++++++++++++++++++++++
drivers/scsi/elx/libefc/efc_nport.h | 50 ++
2 files changed, 844 insertions(+)
create mode 100644 drivers/scsi/elx/libefc/efc_nport.c
create mode 100644 drivers/scsi/elx/libefc/efc_nport.h
diff --git a/drivers/scsi/elx/libefc/efc_nport.c b/drivers/scsi/elx/libefc/efc_nport.c
new file mode 100644
index 000000000000..fad42cd8a108
--- /dev/null
+++ b/drivers/scsi/elx/libefc/efc_nport.c
@@ -0,0 +1,794 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+/*
+ * NPORT
+ *
+ * Port object for physical port and NPIV ports.
+ */
+
+/*
+ * NPORT REFERENCE COUNTING
+ *
+ * A nport reference should be taken when:
+ * - an nport is allocated
+ * - a vport populates associated nport
+ * - a remote node is allocated
+ * - a unsolicited frame is processed
+ * The reference should be dropped when:
+ * - the unsolicited frame processesing is done
+ * - the remote node is removed
+ * - the vport is removed
+ * - the nport is removed
+ */
+
+#include "efc.h"
+
+int
+efc_nport_cb(void *arg, int event, void *data)
+{
+ struct efc *efc = arg;
+ struct efc_nport *nport = data;
+ unsigned long flags = 0;
+
+ efc_log_debug(efc, "nport event: %s\n", efc_sm_event_name(event));
+
+ spin_lock_irqsave(&efc->lock, flags);
+ efc_sm_post_event(&nport->sm, event, NULL);
+ spin_unlock_irqrestore(&efc->lock, flags);
+
+ return EFC_SUCCESS;
+}
+
+static struct efc_nport *
+efc_nport_find_wwn(struct efc_domain *domain, uint64_t wwnn, uint64_t wwpn)
+{
+ struct efc_nport *nport = NULL;
+
+ /* Find a nport, given the WWNN and WWPN */
+ list_for_each_entry(nport, &domain->nport_list, list_entry) {
+ if (nport->wwnn == wwnn && nport->wwpn == wwpn)
+ return nport;
+ }
+ return NULL;
+}
+
+static void
+_efc_nport_free(struct kref *arg)
+{
+ struct efc_nport *nport = container_of(arg, struct efc_nport, ref);
+
+ kfree(nport);
+}
+
+struct efc_nport *
+efc_nport_alloc(struct efc_domain *domain, uint64_t wwpn, uint64_t wwnn,
+ u32 fc_id, bool enable_ini, bool enable_tgt)
+{
+ struct efc_nport *nport;
+
+ if (domain->efc->enable_ini)
+ enable_ini = 0;
+
+ /* Return a failure if this nport has already been allocated */
+ if ((wwpn != 0) || (wwnn != 0)) {
+ nport = efc_nport_find_wwn(domain, wwnn, wwpn);
+ if (nport) {
+ efc_log_err(domain->efc,
+ "Err: NPORT %016llX %016llX already allocated\n",
+ wwnn, wwpn);
+ return NULL;
+ }
+ }
+
+ nport = kzalloc(sizeof(*nport), GFP_ATOMIC);
+ if (!nport)
+ return nport;
+
+ /* initialize refcount */
+ kref_init(&nport->ref);
+ nport->release = _efc_nport_free;
+
+ nport->efc = domain->efc;
+ snprintf(nport->display_name, sizeof(nport->display_name), "------");
+ nport->domain = domain;
+ xa_init(&nport->lookup);
+ nport->instance_index = domain->nport_count++;
+ nport->sm.app = nport;
+ nport->enable_ini = enable_ini;
+ nport->enable_tgt = enable_tgt;
+ nport->enable_rscn = (nport->enable_ini ||
+ (nport->enable_tgt && enable_target_rscn(nport->efc)));
+
+ /* Copy service parameters from domain */
+ memcpy(nport->service_params, domain->service_params,
+ sizeof(struct fc_els_flogi));
+
+ /* Update requested fc_id */
+ nport->fc_id = fc_id;
+
+ /* Update the nport's service parameters for the new wwn's */
+ nport->wwpn = wwpn;
+ nport->wwnn = wwnn;
+ snprintf(nport->wwnn_str, sizeof(nport->wwnn_str), "%016llX",
+ (unsigned long long)wwnn);
+
+ /*
+ * if this is the "first" nport of the domain,
+ * then make it the "phys" nport
+ */
+ if (list_empty(&domain->nport_list))
+ domain->nport = nport;
+
+ INIT_LIST_HEAD(&nport->list_entry);
+ list_add_tail(&nport->list_entry, &domain->nport_list);
+
+ kref_get(&domain->ref);
+
+ efc_log_debug(domain->efc, "New Nport [%s]\n", nport->display_name);
+
+ return nport;
+}
+
+void
+efc_nport_free(struct efc_nport *nport)
+{
+ struct efc_domain *domain;
+
+ if (!nport)
+ return;
+
+ domain = nport->domain;
+ efc_log_debug(domain->efc, "[%s] free nport\n", nport->display_name);
+ list_del(&nport->list_entry);
+ /*
+ * if this is the physical nport,
+ * then clear it out of the domain
+ */
+ if (nport == domain->nport)
+ domain->nport = NULL;
+
+ xa_destroy(&nport->lookup);
+ xa_erase(&domain->lookup, nport->fc_id);
+
+ if (list_empty(&domain->nport_list))
+ efc_domain_post_event(domain, EFC_EVT_ALL_CHILD_NODES_FREE,
+ NULL);
+
+ kref_put(&domain->ref, domain->release);
+ kref_put(&nport->ref, nport->release);
+
+}
+
+struct efc_nport *
+efc_nport_find(struct efc_domain *domain, u32 d_id)
+{
+ struct efc_nport *nport;
+
+ /* Find a nport object, given an FC_ID */
+ nport = xa_load(&domain->lookup, d_id);
+ if (!nport || !kref_get_unless_zero(&nport->ref))
+ return NULL;
+
+ return nport;
+}
+
+int
+efc_nport_attach(struct efc_nport *nport, u32 fc_id)
+{
+ int rc;
+ struct efc_node *node;
+ struct efc *efc = nport->efc;
+ unsigned long index;
+
+ /* Set our lookup */
+ rc = xa_err(xa_store(&nport->domain->lookup, fc_id, nport, GFP_ATOMIC));
+ if (rc) {
+ efc_log_err(efc, "Sport lookup store failed: %d\n", rc);
+ return rc;
+ }
+
+ /* Update our display_name */
+ efc_node_fcid_display(fc_id, nport->display_name,
+ sizeof(nport->display_name));
+
+ xa_for_each(&nport->lookup, index, node) {
+ efc_node_update_display_name(node);
+ }
+
+ efc_log_debug(nport->efc, "[%s] attach nport: fc_id x%06x\n",
+ nport->display_name, fc_id);
+
+ /* Register a nport, given an FC_ID */
+ rc = efc_cmd_nport_attach(efc, nport, fc_id);
+ if (rc != EFC_HW_RTN_SUCCESS) {
+ efc_log_err(nport->efc,
+ "efc_hw_port_attach failed: %d\n", rc);
+ return EFC_FAIL;
+ }
+ return EFC_SUCCESS;
+}
+
+static void
+efc_nport_shutdown(struct efc_nport *nport)
+{
+ struct efc *efc = nport->efc;
+ struct efc_node *node;
+ unsigned long index;
+
+ xa_for_each(&nport->lookup, index, node) {
+ if (!(node->rnode.fc_id == FC_FID_FLOGI && nport->is_vport)) {
+ efc_node_post_event(node, EFC_EVT_SHUTDOWN, NULL);
+ continue;
+ }
+
+ /*
+ * If this is a vport, logout of the fabric
+ * controller so that it deletes the vport
+ * on the switch.
+ */
+ /* if link is down, don't send logo */
+ if (efc->link_status == EFC_LINK_STATUS_DOWN) {
+ efc_node_post_event(node, EFC_EVT_SHUTDOWN, NULL);
+ continue;
+ }
+
+ efc_log_debug(efc, "[%s] nport shutdown vport, send logo\n",
+ node->display_name);
+
+ if (!efc_send_logo(node)) {
+ /* sent LOGO, wait for response */
+ efc_node_transition(node, __efc_d_wait_logo_rsp, NULL);
+ continue;
+ }
+
+ /*
+ * failed to send LOGO,
+ * go ahead and cleanup node anyways
+ */
+ node_printf(node, "Failed to send LOGO\n");
+ efc_node_post_event(node, EFC_EVT_SHUTDOWN_EXPLICIT_LOGO, NULL);
+ }
+}
+
+static void
+efc_vport_link_down(struct efc_nport *nport)
+{
+ struct efc *efc = nport->efc;
+ struct efc_vport_spec *vport;
+
+ /* Clear the nport reference in the vport specification */
+ list_for_each_entry(vport, &efc->vport_list, list_entry) {
+ if (vport->nport == nport) {
+ kref_put(&nport->ref, nport->release);
+ vport->nport = NULL;
+ break;
+ }
+ }
+}
+
