1564 lines
36 KiB
C
1564 lines
36 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
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*/
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/*
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* This file implements remote node state machines for:
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* - Fabric logins.
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* - Fabric controller events.
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* - Name/directory services interaction.
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* - Point-to-point logins.
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*/
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/*
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* fabric_sm Node State Machine: Fabric States
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* ns_sm Node State Machine: Name/Directory Services States
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* p2p_sm Node State Machine: Point-to-Point Node States
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*/
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#include "efc.h"
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static void
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efc_fabric_initiate_shutdown(struct efc_node *node)
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{
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struct efc *efc = node->efc;
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node->els_io_enabled = false;
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if (node->attached) {
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int rc;
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/* issue hw node free; don't care if succeeds right away
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* or sometime later, will check node->attached later in
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* shutdown process
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*/
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rc = efc_cmd_node_detach(efc, &node->rnode);
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if (rc < 0) {
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node_printf(node, "Failed freeing HW node, rc=%d\n",
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rc);
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}
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}
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/*
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* node has either been detached or is in the process of being detached,
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* call common node's initiate cleanup function
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*/
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efc_node_initiate_cleanup(node);
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}
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static void
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__efc_fabric_common(const char *funcname, struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg)
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{
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struct efc_node *node = NULL;
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node = ctx->app;
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switch (evt) {
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case EFC_EVT_DOMAIN_ATTACH_OK:
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break;
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case EFC_EVT_SHUTDOWN:
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node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
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efc_fabric_initiate_shutdown(node);
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break;
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default:
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/* call default event handler common to all nodes */
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__efc_node_common(funcname, ctx, evt, arg);
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}
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}
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void
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__efc_fabric_init(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
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void *arg)
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{
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struct efc_node *node = ctx->app;
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struct efc *efc = node->efc;
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efc_node_evt_set(ctx, evt, __func__);
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node_sm_trace();
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switch (evt) {
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case EFC_EVT_REENTER:
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efc_log_debug(efc, ">>> reenter !!\n");
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fallthrough;
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case EFC_EVT_ENTER:
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/* send FLOGI */
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efc_send_flogi(node);
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efc_node_transition(node, __efc_fabric_flogi_wait_rsp, NULL);
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break;
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default:
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__efc_fabric_common(__func__, ctx, evt, arg);
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}
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}
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void
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efc_fabric_set_topology(struct efc_node *node,
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enum efc_nport_topology topology)
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{
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node->nport->topology = topology;
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}
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void
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efc_fabric_notify_topology(struct efc_node *node)
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{
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struct efc_node *tmp_node;
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unsigned long index;
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/*
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* now loop through the nodes in the nport
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* and send topology notification
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*/
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xa_for_each(&node->nport->lookup, index, tmp_node) {
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if (tmp_node != node) {
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efc_node_post_event(tmp_node,
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EFC_EVT_NPORT_TOPOLOGY_NOTIFY,
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&node->nport->topology);
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}
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}
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}
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static bool efc_rnode_is_nport(struct fc_els_flogi *rsp)
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{
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return !(ntohs(rsp->fl_csp.sp_features) & FC_SP_FT_FPORT);
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}
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void
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__efc_fabric_flogi_wait_rsp(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg)
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{
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struct efc_node_cb *cbdata = arg;
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struct efc_node *node = ctx->app;
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efc_node_evt_set(ctx, evt, __func__);
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node_sm_trace();
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switch (evt) {
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case EFC_EVT_SRRS_ELS_REQ_OK: {
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if (efc_node_check_els_req(ctx, evt, arg, ELS_FLOGI,
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__efc_fabric_common, __func__)) {
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return;
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}
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WARN_ON(!node->els_req_cnt);
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node->els_req_cnt--;
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memcpy(node->nport->domain->flogi_service_params,
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cbdata->els_rsp.virt,
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sizeof(struct fc_els_flogi));
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/* Check to see if the fabric is an F_PORT or and N_PORT */
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if (!efc_rnode_is_nport(cbdata->els_rsp.virt)) {
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/* sm: if not nport / efc_domain_attach */
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/* ext_status has the fc_id, attach domain */
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efc_fabric_set_topology(node, EFC_NPORT_TOPO_FABRIC);
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efc_fabric_notify_topology(node);
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WARN_ON(node->nport->domain->attached);
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efc_domain_attach(node->nport->domain,
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cbdata->ext_status);
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efc_node_transition(node,
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__efc_fabric_wait_domain_attach,
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NULL);
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break;
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}
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/* sm: if nport and p2p_winner / efc_domain_attach */
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efc_fabric_set_topology(node, EFC_NPORT_TOPO_P2P);
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if (efc_p2p_setup(node->nport)) {
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node_printf(node,
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"p2p setup failed, shutting down node\n");
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node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
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efc_fabric_initiate_shutdown(node);
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break;
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}
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if (node->nport->p2p_winner) {
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efc_node_transition(node,
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__efc_p2p_wait_domain_attach,
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NULL);
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if (node->nport->domain->attached &&
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!node->nport->domain->domain_notify_pend) {
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/*
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* already attached,
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* just send ATTACH_OK
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*/
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node_printf(node,
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"p2p winner, domain already attached\n");
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efc_node_post_event(node,
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EFC_EVT_DOMAIN_ATTACH_OK,
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NULL);
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}
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} else {
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/*
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* peer is p2p winner;
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* PLOGI will be received on the
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* remote SID=1 node;
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* this node has served its purpose
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*/
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node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
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efc_fabric_initiate_shutdown(node);
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}
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break;
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}
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case EFC_EVT_ELS_REQ_ABORTED:
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case EFC_EVT_SRRS_ELS_REQ_RJT:
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case EFC_EVT_SRRS_ELS_REQ_FAIL: {
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struct efc_nport *nport = node->nport;
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/*
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* with these errors, we have no recovery,
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* so shutdown the nport, leave the link
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* up and the domain ready
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*/
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if (efc_node_check_els_req(ctx, evt, arg, ELS_FLOGI,
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__efc_fabric_common, __func__)) {
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return;
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}
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node_printf(node,
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"FLOGI failed evt=%s, shutting down nport [%s]\n",
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efc_sm_event_name(evt), nport->display_name);
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WARN_ON(!node->els_req_cnt);
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node->els_req_cnt--;
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efc_sm_post_event(&nport->sm, EFC_EVT_SHUTDOWN, NULL);
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break;
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}
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default:
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__efc_fabric_common(__func__, ctx, evt, arg);
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}
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}
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void
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__efc_vport_fabric_init(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg)
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{
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struct efc_node *node = ctx->app;
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efc_node_evt_set(ctx, evt, __func__);
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node_sm_trace();
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switch (evt) {
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case EFC_EVT_ENTER:
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/* sm: / send FDISC */
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efc_send_fdisc(node);
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efc_node_transition(node, __efc_fabric_fdisc_wait_rsp, NULL);
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break;
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default:
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__efc_fabric_common(__func__, ctx, evt, arg);
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}
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}
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void
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__efc_fabric_fdisc_wait_rsp(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg)
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{
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struct efc_node_cb *cbdata = arg;
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struct efc_node *node = ctx->app;
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efc_node_evt_set(ctx, evt, __func__);
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node_sm_trace();
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switch (evt) {
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case EFC_EVT_SRRS_ELS_REQ_OK: {
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/* fc_id is in ext_status */
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if (efc_node_check_els_req(ctx, evt, arg, ELS_FDISC,
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__efc_fabric_common, __func__)) {
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return;
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}
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WARN_ON(!node->els_req_cnt);
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node->els_req_cnt--;
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/* sm: / efc_nport_attach */
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efc_nport_attach(node->nport, cbdata->ext_status);
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efc_node_transition(node, __efc_fabric_wait_domain_attach,
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NULL);
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break;
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}
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case EFC_EVT_SRRS_ELS_REQ_RJT:
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case EFC_EVT_SRRS_ELS_REQ_FAIL: {
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if (efc_node_check_els_req(ctx, evt, arg, ELS_FDISC,
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__efc_fabric_common, __func__)) {
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return;
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}
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WARN_ON(!node->els_req_cnt);
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node->els_req_cnt--;
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efc_log_err(node->efc, "FDISC failed, shutting down nport\n");
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/* sm: / shutdown nport */
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efc_sm_post_event(&node->nport->sm, EFC_EVT_SHUTDOWN, NULL);
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break;
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}
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default:
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__efc_fabric_common(__func__, ctx, evt, arg);
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}
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}
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static int
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efc_start_ns_node(struct efc_nport *nport)
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{
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struct efc_node *ns;
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/* Instantiate a name services node */
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ns = efc_node_find(nport, FC_FID_DIR_SERV);
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if (!ns) {
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ns = efc_node_alloc(nport, FC_FID_DIR_SERV, false, false);
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if (!ns)
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return -EIO;
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}
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/*
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* for found ns, should we be transitioning from here?
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* breaks transition only
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* 1. from within state machine or
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* 2. if after alloc
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*/
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if (ns->efc->nodedb_mask & EFC_NODEDB_PAUSE_NAMESERVER)
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efc_node_pause(ns, __efc_ns_init);
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else
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efc_node_transition(ns, __efc_ns_init, NULL);
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return 0;
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}
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static int
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efc_start_fabctl_node(struct efc_nport *nport)
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{
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struct efc_node *fabctl;
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fabctl = efc_node_find(nport, FC_FID_FCTRL);
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if (!fabctl) {
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fabctl = efc_node_alloc(nport, FC_FID_FCTRL,
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false, false);
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if (!fabctl)
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return -EIO;
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}
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/*
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* for found ns, should we be transitioning from here?
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* breaks transition only
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* 1. from within state machine or
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* 2. if after alloc
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*/
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efc_node_transition(fabctl, __efc_fabctl_init, NULL);
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return 0;
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}
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void
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__efc_fabric_wait_domain_attach(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg)
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{
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struct efc_node *node = ctx->app;
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efc_node_evt_set(ctx, evt, __func__);
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node_sm_trace();
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switch (evt) {
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case EFC_EVT_ENTER:
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efc_node_hold_frames(node);
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break;
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case EFC_EVT_EXIT:
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efc_node_accept_frames(node);
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break;
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case EFC_EVT_DOMAIN_ATTACH_OK:
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case EFC_EVT_NPORT_ATTACH_OK: {
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int rc;
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rc = efc_start_ns_node(node->nport);
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if (rc)
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return;
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/* sm: if enable_ini / start fabctl node */
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/* Instantiate the fabric controller (sends SCR) */
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if (node->nport->enable_rscn) {
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rc = efc_start_fabctl_node(node->nport);
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if (rc)
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return;
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}
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efc_node_transition(node, __efc_fabric_idle, NULL);
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break;
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}
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default:
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__efc_fabric_common(__func__, ctx, evt, arg);
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}
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}
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void
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__efc_fabric_idle(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
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void *arg)
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{
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struct efc_node *node = ctx->app;
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efc_node_evt_set(ctx, evt, __func__);
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node_sm_trace();
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switch (evt) {
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case EFC_EVT_DOMAIN_ATTACH_OK:
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break;
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default:
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__efc_fabric_common(__func__, ctx, evt, arg);
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}
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}
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void
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__efc_ns_init(struct efc_sm_ctx *ctx, enum efc_sm_event evt, void *arg)
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{
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struct efc_node *node = ctx->app;
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efc_node_evt_set(ctx, evt, __func__);
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node_sm_trace();
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switch (evt) {
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case EFC_EVT_ENTER:
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/* sm: / send PLOGI */
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efc_send_plogi(node);
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efc_node_transition(node, __efc_ns_plogi_wait_rsp, NULL);
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break;
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default:
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__efc_fabric_common(__func__, ctx, evt, arg);
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}
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}
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void
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__efc_ns_plogi_wait_rsp(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg)
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{
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struct efc_node_cb *cbdata = arg;
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struct efc_node *node = ctx->app;
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efc_node_evt_set(ctx, evt, __func__);
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node_sm_trace();
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switch (evt) {
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case EFC_EVT_SRRS_ELS_REQ_OK: {
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int rc;
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/* Save service parameters */
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if (efc_node_check_els_req(ctx, evt, arg, ELS_PLOGI,
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__efc_fabric_common, __func__)) {
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return;
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}
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WARN_ON(!node->els_req_cnt);
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node->els_req_cnt--;
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/* sm: / save sparams, efc_node_attach */
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efc_node_save_sparms(node, cbdata->els_rsp.virt);
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rc = efc_node_attach(node);
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efc_node_transition(node, __efc_ns_wait_node_attach, NULL);
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if (rc < 0)
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efc_node_post_event(node, EFC_EVT_NODE_ATTACH_FAIL,
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NULL);
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break;
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}
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default:
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__efc_fabric_common(__func__, ctx, evt, arg);
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}
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}
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void
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__efc_ns_wait_node_attach(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg)
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{
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struct efc_node *node = ctx->app;
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efc_node_evt_set(ctx, evt, __func__);
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node_sm_trace();
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switch (evt) {
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case EFC_EVT_ENTER:
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efc_node_hold_frames(node);
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break;
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case EFC_EVT_EXIT:
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efc_node_accept_frames(node);
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break;
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case EFC_EVT_NODE_ATTACH_OK:
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node->attached = true;
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/* sm: / send RFTID */
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efc_ns_send_rftid(node);
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efc_node_transition(node, __efc_ns_rftid_wait_rsp, NULL);
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break;
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case EFC_EVT_NODE_ATTACH_FAIL:
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/* node attach failed, shutdown the node */
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node->attached = false;
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node_printf(node, "Node attach failed\n");
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node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
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efc_fabric_initiate_shutdown(node);
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break;
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case EFC_EVT_SHUTDOWN:
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node_printf(node, "Shutdown event received\n");
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node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
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efc_node_transition(node,
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__efc_fabric_wait_attach_evt_shutdown,
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NULL);
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break;
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/*
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* if receive RSCN just ignore,
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* we haven't sent GID_PT yet (ACC sent by fabctl node)
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*/
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case EFC_EVT_RSCN_RCVD:
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break;
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default:
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__efc_fabric_common(__func__, ctx, evt, arg);
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}
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}
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void
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__efc_fabric_wait_attach_evt_shutdown(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg)
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{
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struct efc_node *node = ctx->app;
|
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|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER:
|
|
efc_node_hold_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_EXIT:
|
|
efc_node_accept_frames(node);
|
|
break;
|
|
|
|
/* wait for any of these attach events and then shutdown */
|
|
case EFC_EVT_NODE_ATTACH_OK:
|
|
node->attached = true;
|
|
node_printf(node, "Attach evt=%s, proceed to shutdown\n",
|
|
efc_sm_event_name(evt));
|
|
efc_fabric_initiate_shutdown(node);
|
|
break;
|
|
|
|
case EFC_EVT_NODE_ATTACH_FAIL:
|
|
node->attached = false;
|
|
node_printf(node, "Attach evt=%s, proceed to shutdown\n",
|
|
efc_sm_event_name(evt));
|
|
efc_fabric_initiate_shutdown(node);
|
|
break;
|
|
|
|
/* ignore shutdown event as we're already in shutdown path */
|
|
case EFC_EVT_SHUTDOWN:
|
|
node_printf(node, "Shutdown event received\n");
|
|
break;
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_ns_rftid_wait_rsp(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_SRRS_ELS_REQ_OK:
|
|
if (efc_node_check_ns_req(ctx, evt, arg, FC_NS_RFT_ID,
|
|
__efc_fabric_common, __func__)) {
|
|
return;
|
|
}
|
|
WARN_ON(!node->els_req_cnt);
|
|
node->els_req_cnt--;
|
|
/* sm: / send RFFID */
|
|
efc_ns_send_rffid(node);
|
|
efc_node_transition(node, __efc_ns_rffid_wait_rsp, NULL);
|
|
break;
|
|
|
|
/*
|
|
* if receive RSCN just ignore,
|
|
* we haven't sent GID_PT yet (ACC sent by fabctl node)
|
|
*/
|
|
case EFC_EVT_RSCN_RCVD:
|
|
break;
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_ns_rffid_wait_rsp(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
/*
|
|
* Waits for an RFFID response event;
|
|
* if rscn enabled, a GIDPT name services request is issued.
|
|
*/
|
|
switch (evt) {
|
|
case EFC_EVT_SRRS_ELS_REQ_OK: {
|
|
if (efc_node_check_ns_req(ctx, evt, arg, FC_NS_RFF_ID,
|
|
__efc_fabric_common, __func__)) {
|
|
return;
|
|
}
|
|
WARN_ON(!node->els_req_cnt);
|
|
node->els_req_cnt--;
|
|
if (node->nport->enable_rscn) {
|
|
/* sm: if enable_rscn / send GIDPT */
|
|
efc_ns_send_gidpt(node);
|
|
|
|
efc_node_transition(node, __efc_ns_gidpt_wait_rsp,
|
|
NULL);
|
|
} else {
|
|
/* if 'T' only, we're done, go to idle */
|
|
efc_node_transition(node, __efc_ns_idle, NULL);
|
|
}
|
|
break;
|
|
}
|
|
/*
|
|
* if receive RSCN just ignore,
|
|
* we haven't sent GID_PT yet (ACC sent by fabctl node)
|
|
*/
|
|
case EFC_EVT_RSCN_RCVD:
|
|
break;
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
static int
|
|
efc_process_gidpt_payload(struct efc_node *node,
|
|
void *data, u32 gidpt_len)
|
|
{
|
|
u32 i, j;
|
|
struct efc_node *newnode;
|
|
struct efc_nport *nport = node->nport;
|
|
struct efc *efc = node->efc;
|
|
u32 port_id = 0, port_count, plist_count;
|
|
struct efc_node *n;
|
|
struct efc_node **active_nodes;
|
|
int residual;
|
|
struct {
|
|
struct fc_ct_hdr hdr;
|
|
struct fc_gid_pn_resp pn_rsp;
|
|
} *rsp;
|
|
struct fc_gid_pn_resp *gidpt;
|
|
unsigned long index;
|
|
|
|
rsp = data;
|
|
gidpt = &rsp->pn_rsp;
|
|
residual = be16_to_cpu(rsp->hdr.ct_mr_size);
|
|
|
|
if (residual != 0)
|
|
efc_log_debug(node->efc, "residual is %u words\n", residual);
|
|
|
|
if (be16_to_cpu(rsp->hdr.ct_cmd) == FC_FS_RJT) {
|
|
node_printf(node,
|
|
"GIDPT request failed: rsn x%x rsn_expl x%x\n",
|
|
rsp->hdr.ct_reason, rsp->hdr.ct_explan);
|
|
return -EIO;
|
|
}
|
|
|
|
plist_count = (gidpt_len - sizeof(struct fc_ct_hdr)) / sizeof(*gidpt);
|
|
|
|
/* Count the number of nodes */
|
|
port_count = 0;
|
|
xa_for_each(&nport->lookup, index, n) {
|
|
port_count++;
|
|
}
|
|
|
|
/* Allocate a buffer for all nodes */
|
|
active_nodes = kcalloc(port_count, sizeof(*active_nodes), GFP_ATOMIC);
|
|
if (!active_nodes) {
|
|
node_printf(node, "efc_malloc failed\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* Fill buffer with fc_id of active nodes */
|
|
i = 0;
|
|
xa_for_each(&nport->lookup, index, n) {
|
|
port_id = n->rnode.fc_id;
|
|
switch (port_id) {
|
|
case FC_FID_FLOGI:
|
|
case FC_FID_FCTRL:
|
|
case FC_FID_DIR_SERV:
|
|
break;
|
|
default:
|
|
if (port_id != FC_FID_DOM_MGR)
|
|
active_nodes[i++] = n;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* update the active nodes buffer */
|
|
for (i = 0; i < plist_count; i++) {
|
|
hton24(gidpt[i].fp_fid, port_id);
|
|
|
|
for (j = 0; j < port_count; j++) {
|
|
if (active_nodes[j] &&
|
|
port_id == active_nodes[j]->rnode.fc_id) {
|
|
active_nodes[j] = NULL;
|
|
}
|
|
}
|
|
|
|
if (gidpt[i].fp_resvd & FC_NS_FID_LAST)
|
|
break;
|
|
}
|
|
|
|
/* Those remaining in the active_nodes[] are now gone ! */
|
|
for (i = 0; i < port_count; i++) {
|
|
/*
|
|
* if we're an initiator and the remote node
|
|
* is a target, then post the node missing event.
|
|
* if we're target and we have enabled
|
|
* target RSCN, then post the node missing event.
|
|
*/
|
|
if (!active_nodes[i])
|
|
continue;
|
|
|
|
if ((node->nport->enable_ini && active_nodes[i]->targ) ||
|
|
(node->nport->enable_tgt && enable_target_rscn(efc))) {
|
|
efc_node_post_event(active_nodes[i],
|
|
EFC_EVT_NODE_MISSING, NULL);
|
|
} else {
|
|
node_printf(node,
|
|
"GID_PT: skipping non-tgt port_id x%06x\n",
|
|
active_nodes[i]->rnode.fc_id);
|
|
}
|
|
}
|
|
kfree(active_nodes);
|
|
|
|
for (i = 0; i < plist_count; i++) {
|
|
hton24(gidpt[i].fp_fid, port_id);
|
|
|
|
/* Don't create node for ourselves */
|
|
if (port_id == node->rnode.nport->fc_id) {
|
|
if (gidpt[i].fp_resvd & FC_NS_FID_LAST)
|
|
break;
|
|
continue;
|
|
}
|
|
|
|
newnode = efc_node_find(nport, port_id);
|
|
if (!newnode) {
|
|
if (!node->nport->enable_ini)
|
|
continue;
|
|
|
|
newnode = efc_node_alloc(nport, port_id, false, false);
|
|
if (!newnode) {
|
|
efc_log_err(efc, "efc_node_alloc() failed\n");
|
|
return -EIO;
|
|
}
|
|
/*
|
|
* send PLOGI automatically
|
|
* if initiator
|
|
*/
|
|
efc_node_init_device(newnode, true);
|
|
}
|
|
|
|
if (node->nport->enable_ini && newnode->targ) {
|
|
efc_node_post_event(newnode, EFC_EVT_NODE_REFOUND,
|
|
NULL);
|
|
}
|
|
|
|
if (gidpt[i].fp_resvd & FC_NS_FID_LAST)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
__efc_ns_gidpt_wait_rsp(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node_cb *cbdata = arg;
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
/*
|
|
* Wait for a GIDPT response from the name server. Process the FC_IDs
|
|
* that are reported by creating new remote ports, as needed.
|
|
*/
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_SRRS_ELS_REQ_OK: {
|
|
if (efc_node_check_ns_req(ctx, evt, arg, FC_NS_GID_PT,
|
|
__efc_fabric_common, __func__)) {
|
|
return;
|
|
}
|
|
WARN_ON(!node->els_req_cnt);
|
|
node->els_req_cnt--;
|
|
/* sm: / process GIDPT payload */
|
|
efc_process_gidpt_payload(node, cbdata->els_rsp.virt,
|
|
cbdata->els_rsp.len);
|
|
efc_node_transition(node, __efc_ns_idle, NULL);
|
|
break;
|
|
}
|
|
|
|
case EFC_EVT_SRRS_ELS_REQ_FAIL: {
|
|
/* not much we can do; will retry with the next RSCN */
|
|
node_printf(node, "GID_PT failed to complete\n");
|
|
WARN_ON(!node->els_req_cnt);
|
|
node->els_req_cnt--;
|
|
efc_node_transition(node, __efc_ns_idle, NULL);
|
|
break;
|
|
}
|
|
|
|
/* if receive RSCN here, queue up another discovery processing */
|
|
case EFC_EVT_RSCN_RCVD: {
|
|
node_printf(node, "RSCN received during GID_PT processing\n");
|
|
node->rscn_pending = true;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_ns_idle(struct efc_sm_ctx *ctx, enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node *node = ctx->app;
|
|
struct efc *efc = node->efc;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
/*
|
|
* Wait for RSCN received events (posted from the fabric controller)
|
|
* and restart the GIDPT name services query and processing.
|
|
*/
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER:
|
|
if (!node->rscn_pending)
|
|
break;
|
|
|
|
node_printf(node, "RSCN pending, restart discovery\n");
|
|
node->rscn_pending = false;
|
|
fallthrough;
|
|
|
|
case EFC_EVT_RSCN_RCVD: {
|
|
/* sm: / send GIDPT */
|
|
/*
|
|
* If target RSCN processing is enabled,
|
|
* and this is target only (not initiator),
|
|
* and tgt_rscn_delay is non-zero,
|
|
* then we delay issuing the GID_PT
|
|
*/
|
|
if (efc->tgt_rscn_delay_msec != 0 &&
|
|
!node->nport->enable_ini && node->nport->enable_tgt &&
|
|
enable_target_rscn(efc)) {
|
|
efc_node_transition(node, __efc_ns_gidpt_delay, NULL);
|
|
} else {
|
|
efc_ns_send_gidpt(node);
|
|
efc_node_transition(node, __efc_ns_gidpt_wait_rsp,
|
|
NULL);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gidpt_delay_timer_cb(struct timer_list *t)
|
|
{
|
|
struct efc_node *node = from_timer(node, t, gidpt_delay_timer);
|
|
|
|
del_timer(&node->gidpt_delay_timer);
|
|
|
|
efc_node_post_event(node, EFC_EVT_GIDPT_DELAY_EXPIRED, NULL);
|
|
}
|
|
|
|
void
|
|
__efc_ns_gidpt_delay(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node *node = ctx->app;
|
|
struct efc *efc = node->efc;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER: {
|
|
u64 delay_msec, tmp;
|
|
|
|
/*
|
|
* Compute the delay time.
|
|
* Set to tgt_rscn_delay, if the time since last GIDPT
|
|
* is less than tgt_rscn_period, then use tgt_rscn_period.
|
|
*/
|
|
delay_msec = efc->tgt_rscn_delay_msec;
|
|
tmp = jiffies_to_msecs(jiffies) - node->time_last_gidpt_msec;
|
|
if (tmp < efc->tgt_rscn_period_msec)
|
|
delay_msec = efc->tgt_rscn_period_msec;
|
|
|
|
timer_setup(&node->gidpt_delay_timer, &gidpt_delay_timer_cb,
|
|
0);
|
|
mod_timer(&node->gidpt_delay_timer,
|
|
jiffies + msecs_to_jiffies(delay_msec));
|
|
|
|
break;
|
|
}
|
|
|
|
case EFC_EVT_GIDPT_DELAY_EXPIRED:
|
|
node->time_last_gidpt_msec = jiffies_to_msecs(jiffies);
|
|
|
|
efc_ns_send_gidpt(node);
|
|
efc_node_transition(node, __efc_ns_gidpt_wait_rsp, NULL);
|
|
break;
|
|
|
|
case EFC_EVT_RSCN_RCVD: {
|
|
efc_log_debug(efc,
|
|
"RSCN received while in GIDPT delay - no action\n");
|
|
break;
|
|
}
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_fabctl_init(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node *node = ctx->app;
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER:
|
|
/* no need to login to fabric controller, just send SCR */
|
|
efc_send_scr(node);
|
|
efc_node_transition(node, __efc_fabctl_wait_scr_rsp, NULL);
|
|
break;
|
|
|
|
case EFC_EVT_NODE_ATTACH_OK:
|
|
node->attached = true;
|
|
break;
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_fabctl_wait_scr_rsp(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
/*
|
|
* Fabric controller node state machine:
|
|
* Wait for an SCR response from the fabric controller.
|
|
*/
|
|
switch (evt) {
|
|
case EFC_EVT_SRRS_ELS_REQ_OK:
|
|
if (efc_node_check_els_req(ctx, evt, arg, ELS_SCR,
|
|
__efc_fabric_common, __func__)) {
|
|
return;
|
|
}
|
|
WARN_ON(!node->els_req_cnt);
|
|
node->els_req_cnt--;
|
|
efc_node_transition(node, __efc_fabctl_ready, NULL);
|
|
break;
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
static void
|
|
efc_process_rscn(struct efc_node *node, struct efc_node_cb *cbdata)
|
|
{
|
|
struct efc *efc = node->efc;
|
|
struct efc_nport *nport = node->nport;
|
|
struct efc_node *ns;
|
|
|
|
/* Forward this event to the name-services node */
|
|
ns = efc_node_find(nport, FC_FID_DIR_SERV);
|
|
if (ns)
|
|
efc_node_post_event(ns, EFC_EVT_RSCN_RCVD, cbdata);
|
|
else
|
|
efc_log_warn(efc, "can't find name server node\n");
|
|
}
|
|
|
|
void
|
|
__efc_fabctl_ready(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node_cb *cbdata = arg;
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
/*
|
|
* Fabric controller node state machine: Ready.
|
|
* In this state, the fabric controller sends a RSCN, which is received
|
|
* by this node and is forwarded to the name services node object; and
|
|
* the RSCN LS_ACC is sent.
|
|
*/
|
|
switch (evt) {
|
|
case EFC_EVT_RSCN_RCVD: {
|
|
struct fc_frame_header *hdr = cbdata->header->dma.virt;
|
|
|
|
/*
|
|
* sm: / process RSCN (forward to name services node),
|
|
* send LS_ACC
|
|
*/
|
|
efc_process_rscn(node, cbdata);
|
|
efc_send_ls_acc(node, be16_to_cpu(hdr->fh_ox_id));
|
|
efc_node_transition(node, __efc_fabctl_wait_ls_acc_cmpl,
|
|
NULL);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_fabctl_wait_ls_acc_cmpl(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER:
|
|
efc_node_hold_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_EXIT:
|
|
efc_node_accept_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_SRRS_ELS_CMPL_OK:
|
|
WARN_ON(!node->els_cmpl_cnt);
|
|
node->els_cmpl_cnt--;
|
|
efc_node_transition(node, __efc_fabctl_ready, NULL);
|
|
break;
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
static uint64_t
|
|
efc_get_wwpn(struct fc_els_flogi *sp)
|
|
{
|
|
return be64_to_cpu(sp->fl_wwnn);
|
|
}
|
|
|
|
static int
|
|
efc_rnode_is_winner(struct efc_nport *nport)
|
|
{
|
|
struct fc_els_flogi *remote_sp;
|
|
u64 remote_wwpn;
|
|
u64 local_wwpn = nport->wwpn;
|
|
u64 wwn_bump = 0;
|
|
|
|
remote_sp = (struct fc_els_flogi *)nport->domain->flogi_service_params;
|
|
remote_wwpn = efc_get_wwpn(remote_sp);
|
|
|
|
local_wwpn ^= wwn_bump;
|
|
|
|
efc_log_debug(nport->efc, "r: %llx\n",
|
|
be64_to_cpu(remote_sp->fl_wwpn));
|
|
efc_log_debug(nport->efc, "l: %llx\n", local_wwpn);
|
|
|
|
if (remote_wwpn == local_wwpn) {
|
|
efc_log_warn(nport->efc,
|
|
"WWPN of remote node [%08x %08x] matches local WWPN\n",
|
|
(u32)(local_wwpn >> 32ll),
|
|
(u32)local_wwpn);
|
|
return -1;
|
|
}
|
|
|
|
return (remote_wwpn > local_wwpn);
|
|
}
|
|
|
|
void
|
|
__efc_p2p_wait_domain_attach(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node *node = ctx->app;
|
|
struct efc *efc = node->efc;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER:
|
|
efc_node_hold_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_EXIT:
|
|
efc_node_accept_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_DOMAIN_ATTACH_OK: {
|
|
struct efc_nport *nport = node->nport;
|
|
struct efc_node *rnode;
|
|
|
|
/*
|
|
* this transient node (SID=0 (recv'd FLOGI)
|
|
* or DID=fabric (sent FLOGI))
|
|
* is the p2p winner, will use a separate node
|
|
* to send PLOGI to peer
|
|
*/
|
|
WARN_ON(!node->nport->p2p_winner);
|
|
|
|
rnode = efc_node_find(nport, node->nport->p2p_remote_port_id);
|
|
if (rnode) {
|
|
/*
|
|
* the "other" transient p2p node has
|
|
* already kicked off the
|
|
* new node from which PLOGI is sent
|
|
*/
|
|
node_printf(node,
|
|
"Node with fc_id x%x already exists\n",
|
|
rnode->rnode.fc_id);
|
|
} else {
|
|
/*
|
|
* create new node (SID=1, DID=2)
|
|
* from which to send PLOGI
|
|
*/
|
|
rnode = efc_node_alloc(nport,
|
|
nport->p2p_remote_port_id,
|
|
false, false);
|
|
if (!rnode) {
|
|
efc_log_err(efc, "node alloc failed\n");
|
|
return;
|
|
}
|
|
|
|
efc_fabric_notify_topology(node);
|
|
/* sm: / allocate p2p remote node */
|
|
efc_node_transition(rnode, __efc_p2p_rnode_init,
|
|
NULL);
|
|
}
|
|
|
|
/*
|
|
* the transient node (SID=0 or DID=fabric)
|
|
* has served its purpose
|
|
*/
|
|
if (node->rnode.fc_id == 0) {
|
|
/*
|
|
* if this is the SID=0 node,
|
|
* move to the init state in case peer
|
|
* has restarted FLOGI discovery and FLOGI is pending
|
|
*/
|
|
/* don't send PLOGI on efc_d_init entry */
|
|
efc_node_init_device(node, false);
|
|
} else {
|
|
/*
|
|
* if this is the DID=fabric node
|
|
* (we initiated FLOGI), shut it down
|
|
*/
|
|
node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
|
|
efc_fabric_initiate_shutdown(node);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_p2p_rnode_init(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node_cb *cbdata = arg;
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER:
|
|
/* sm: / send PLOGI */
|
|
efc_send_plogi(node);
|
|
efc_node_transition(node, __efc_p2p_wait_plogi_rsp, NULL);
|
|
break;
|
|
|
|
case EFC_EVT_ABTS_RCVD:
|
|
/* sm: send BA_ACC */
|
|
efc_send_bls_acc(node, cbdata->header->dma.virt);
|
|
|
|
break;
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_p2p_wait_flogi_acc_cmpl(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node_cb *cbdata = arg;
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER:
|
|
efc_node_hold_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_EXIT:
|
|
efc_node_accept_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_SRRS_ELS_CMPL_OK:
|
|
WARN_ON(!node->els_cmpl_cnt);
|
|
node->els_cmpl_cnt--;
|
|
|
|
/* sm: if p2p_winner / domain_attach */
|
|
if (node->nport->p2p_winner) {
|
|
efc_node_transition(node,
|
|
__efc_p2p_wait_domain_attach,
|
|
NULL);
|
|
if (!node->nport->domain->attached) {
|
|
node_printf(node, "Domain not attached\n");
|
|
efc_domain_attach(node->nport->domain,
|
|
node->nport->p2p_port_id);
|
|
} else {
|
|
node_printf(node, "Domain already attached\n");
|
|
efc_node_post_event(node,
|
|
EFC_EVT_DOMAIN_ATTACH_OK,
|
|
NULL);
|
|
}
|
|
} else {
|
|
/* this node has served its purpose;
|
|
* we'll expect a PLOGI on a separate
|
|
* node (remote SID=0x1); return this node
|
|
* to init state in case peer
|
|
* restarts discovery -- it may already
|
|
* have (pending frames may exist).
|
|
*/
|
|
/* don't send PLOGI on efc_d_init entry */
|
|
efc_node_init_device(node, false);
|
|
}
|
|
break;
|
|
|
|
case EFC_EVT_SRRS_ELS_CMPL_FAIL:
|
|
/*
|
|
* LS_ACC failed, possibly due to link down;
|
|
* shutdown node and wait
|
|
* for FLOGI discovery to restart
|
|
*/
|
|
node_printf(node, "FLOGI LS_ACC failed, shutting down\n");
|
|
WARN_ON(!node->els_cmpl_cnt);
|
|
node->els_cmpl_cnt--;
|
|
node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
|
|
efc_fabric_initiate_shutdown(node);
|
|
break;
|
|
|
|
case EFC_EVT_ABTS_RCVD: {
|
|
/* sm: / send BA_ACC */
|
|
efc_send_bls_acc(node, cbdata->header->dma.virt);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_p2p_wait_plogi_rsp(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node_cb *cbdata = arg;
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_SRRS_ELS_REQ_OK: {
|
|
int rc;
|
|
|
|
if (efc_node_check_els_req(ctx, evt, arg, ELS_PLOGI,
|
|
__efc_fabric_common, __func__)) {
|
|
return;
|
|
}
|
|
WARN_ON(!node->els_req_cnt);
|
|
node->els_req_cnt--;
|
|
/* sm: / save sparams, efc_node_attach */
|
|
efc_node_save_sparms(node, cbdata->els_rsp.virt);
|
|
rc = efc_node_attach(node);
|
|
efc_node_transition(node, __efc_p2p_wait_node_attach, NULL);
|
|
if (rc < 0)
|
|
efc_node_post_event(node, EFC_EVT_NODE_ATTACH_FAIL,
|
|
NULL);
|
|
break;
|
|
}
|
|
case EFC_EVT_SRRS_ELS_REQ_FAIL: {
|
|
if (efc_node_check_els_req(ctx, evt, arg, ELS_PLOGI,
|
|
__efc_fabric_common, __func__)) {
|
|
return;
|
|
}
|
|
node_printf(node, "PLOGI failed, shutting down\n");
|
|
WARN_ON(!node->els_req_cnt);
|
|
node->els_req_cnt--;
|
|
node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
|
|
efc_fabric_initiate_shutdown(node);
|
|
break;
|
|
}
|
|
|
|
case EFC_EVT_PLOGI_RCVD: {
|
|
struct fc_frame_header *hdr = cbdata->header->dma.virt;
|
|
/* if we're in external loopback mode, just send LS_ACC */
|
|
if (node->efc->external_loopback) {
|
|
efc_send_plogi_acc(node, be16_to_cpu(hdr->fh_ox_id));
|
|
} else {
|
|
/*
|
|
* if this isn't external loopback,
|
|
* pass to default handler
|
|
*/
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
break;
|
|
}
|
|
case EFC_EVT_PRLI_RCVD:
|
|
/* I, or I+T */
|
|
/* sent PLOGI and before completion was seen, received the
|
|
* PRLI from the remote node (WCQEs and RCQEs come in on
|
|
* different queues and order of processing cannot be assumed)
|
|
* Save OXID so PRLI can be sent after the attach and continue
|
|
* to wait for PLOGI response
|
|
*/
|
|
efc_process_prli_payload(node, cbdata->payload->dma.virt);
|
|
efc_send_ls_acc_after_attach(node,
|
|
cbdata->header->dma.virt,
|
|
EFC_NODE_SEND_LS_ACC_PRLI);
|
|
efc_node_transition(node, __efc_p2p_wait_plogi_rsp_recvd_prli,
|
|
NULL);
|
|
break;
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_p2p_wait_plogi_rsp_recvd_prli(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node_cb *cbdata = arg;
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER:
|
|
/*
|
|
* Since we've received a PRLI, we have a port login and will
|
|
* just need to wait for the PLOGI response to do the node
|
|
* attach and then we can send the LS_ACC for the PRLI. If,
|
|
* during this time, we receive FCP_CMNDs (which is possible
|
|
* since we've already sent a PRLI and our peer may have
|
|
* accepted).
|
|
* At this time, we are not waiting on any other unsolicited
|
|
* frames to continue with the login process. Thus, it will not
|
|
* hurt to hold frames here.
|
|
*/
|
|
efc_node_hold_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_EXIT:
|
|
efc_node_accept_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_SRRS_ELS_REQ_OK: { /* PLOGI response received */
|
|
int rc;
|
|
|
|
/* Completion from PLOGI sent */
|
|
if (efc_node_check_els_req(ctx, evt, arg, ELS_PLOGI,
|
|
__efc_fabric_common, __func__)) {
|
|
return;
|
|
}
|
|
WARN_ON(!node->els_req_cnt);
|
|
node->els_req_cnt--;
|
|
/* sm: / save sparams, efc_node_attach */
|
|
efc_node_save_sparms(node, cbdata->els_rsp.virt);
|
|
rc = efc_node_attach(node);
|
|
efc_node_transition(node, __efc_p2p_wait_node_attach, NULL);
|
|
if (rc < 0)
|
|
efc_node_post_event(node, EFC_EVT_NODE_ATTACH_FAIL,
|
|
NULL);
|
|
break;
|
|
}
|
|
case EFC_EVT_SRRS_ELS_REQ_FAIL: /* PLOGI response received */
|
|
case EFC_EVT_SRRS_ELS_REQ_RJT:
|
|
/* PLOGI failed, shutdown the node */
|
|
if (efc_node_check_els_req(ctx, evt, arg, ELS_PLOGI,
|
|
__efc_fabric_common, __func__)) {
|
|
return;
|
|
}
|
|
WARN_ON(!node->els_req_cnt);
|
|
node->els_req_cnt--;
|
|
node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
|
|
efc_fabric_initiate_shutdown(node);
|
|
break;
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
__efc_p2p_wait_node_attach(struct efc_sm_ctx *ctx,
|
|
enum efc_sm_event evt, void *arg)
|
|
{
|
|
struct efc_node_cb *cbdata = arg;
|
|
struct efc_node *node = ctx->app;
|
|
|
|
efc_node_evt_set(ctx, evt, __func__);
|
|
|
|
node_sm_trace();
|
|
|
|
switch (evt) {
|
|
case EFC_EVT_ENTER:
|
|
efc_node_hold_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_EXIT:
|
|
efc_node_accept_frames(node);
|
|
break;
|
|
|
|
case EFC_EVT_NODE_ATTACH_OK:
|
|
node->attached = true;
|
|
switch (node->send_ls_acc) {
|
|
case EFC_NODE_SEND_LS_ACC_PRLI: {
|
|
efc_d_send_prli_rsp(node->ls_acc_io,
|
|
node->ls_acc_oxid);
|
|
node->send_ls_acc = EFC_NODE_SEND_LS_ACC_NONE;
|
|
node->ls_acc_io = NULL;
|
|
break;
|
|
}
|
|
case EFC_NODE_SEND_LS_ACC_PLOGI: /* Can't happen in P2P */
|
|
case EFC_NODE_SEND_LS_ACC_NONE:
|
|
default:
|
|
/* Normal case for I */
|
|
/* sm: send_plogi_acc is not set / send PLOGI acc */
|
|
efc_node_transition(node, __efc_d_port_logged_in,
|
|
NULL);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case EFC_EVT_NODE_ATTACH_FAIL:
|
|
/* node attach failed, shutdown the node */
|
|
node->attached = false;
|
|
node_printf(node, "Node attach failed\n");
|
|
node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
|
|
efc_fabric_initiate_shutdown(node);
|
|
break;
|
|
|
|
case EFC_EVT_SHUTDOWN:
|
|
node_printf(node, "%s received\n", efc_sm_event_name(evt));
|
|
node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
|
|
efc_node_transition(node,
|
|
__efc_fabric_wait_attach_evt_shutdown,
|
|
NULL);
|
|
break;
|
|
case EFC_EVT_PRLI_RCVD:
|
|
node_printf(node, "%s: PRLI received before node is attached\n",
|
|
efc_sm_event_name(evt));
|
|
efc_process_prli_payload(node, cbdata->payload->dma.virt);
|
|
efc_send_ls_acc_after_attach(node,
|
|
cbdata->header->dma.virt,
|
|
EFC_NODE_SEND_LS_ACC_PRLI);
|
|
break;
|
|
|
|
default:
|
|
__efc_fabric_common(__func__, ctx, evt, arg);
|
|
}
|
|
}
|
|
|
|
int
|
|
efc_p2p_setup(struct efc_nport *nport)
|
|
{
|
|
struct efc *efc = nport->efc;
|
|
int rnode_winner;
|
|
|
|
rnode_winner = efc_rnode_is_winner(nport);
|
|
|
|
/* set nport flags to indicate p2p "winner" */
|
|
if (rnode_winner == 1) {
|
|
nport->p2p_remote_port_id = 0;
|
|
nport->p2p_port_id = 0;
|
|
nport->p2p_winner = false;
|
|
} else if (rnode_winner == 0) {
|
|
nport->p2p_remote_port_id = 2;
|
|
nport->p2p_port_id = 1;
|
|
nport->p2p_winner = true;
|
|
} else {
|
|
/* no winner; only okay if external loopback enabled */
|
|
if (nport->efc->external_loopback) {
|
|
/*
|
|
* External loopback mode enabled;
|
|
* local nport and remote node
|
|
* will be registered with an NPortID = 1;
|
|
*/
|
|
efc_log_debug(efc,
|
|
"External loopback mode enabled\n");
|
|
nport->p2p_remote_port_id = 1;
|
|
nport->p2p_port_id = 1;
|
|
nport->p2p_winner = true;
|
|
} else {
|
|
efc_log_warn(efc,
|
|
"failed to determine p2p winner\n");
|
|
return rnode_winner;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|