mirror of https://gitee.com/openkylin/linux.git
483 lines
11 KiB
C
483 lines
11 KiB
C
/*
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* Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*
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* Linux driver for Brocade Fibre Channel Host Bus Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <bfa.h>
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#include <bfa_svc.h>
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#include "fcs_lport.h"
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#include "fcs_rport.h"
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#include "fcs_ms.h"
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#include "fcs_trcmod.h"
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#include "fcs_fcxp.h"
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#include "fcs.h"
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#include "lport_priv.h"
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BFA_TRC_FILE(FCS, SCN);
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#define FC_QOS_RSCN_EVENT 0x0c
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#define FC_FABRIC_NAME_RSCN_EVENT 0x0d
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/*
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* forward declarations
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*/
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static void bfa_fcs_port_scn_send_scr(void *scn_cbarg,
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struct bfa_fcxp_s *fcxp_alloced);
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static void bfa_fcs_port_scn_scr_response(void *fcsarg,
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struct bfa_fcxp_s *fcxp,
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void *cbarg,
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bfa_status_t req_status,
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u32 rsp_len,
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u32 resid_len,
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struct fchs_s *rsp_fchs);
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static void bfa_fcs_port_scn_send_ls_acc(struct bfa_fcs_port_s *port,
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struct fchs_s *rx_fchs);
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static void bfa_fcs_port_scn_timeout(void *arg);
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/**
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* fcs_scm_sm FCS SCN state machine
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*/
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/**
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* VPort SCN State Machine events
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*/
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enum port_scn_event {
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SCNSM_EVENT_PORT_ONLINE = 1,
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SCNSM_EVENT_PORT_OFFLINE = 2,
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SCNSM_EVENT_RSP_OK = 3,
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SCNSM_EVENT_RSP_ERROR = 4,
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SCNSM_EVENT_TIMEOUT = 5,
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SCNSM_EVENT_SCR_SENT = 6,
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};
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static void bfa_fcs_port_scn_sm_offline(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event);
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static void bfa_fcs_port_scn_sm_sending_scr(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event);
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static void bfa_fcs_port_scn_sm_scr(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event);
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static void bfa_fcs_port_scn_sm_scr_retry(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event);
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static void bfa_fcs_port_scn_sm_online(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event);
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/**
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* Starting state - awaiting link up.
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*/
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static void
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bfa_fcs_port_scn_sm_offline(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event)
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{
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switch (event) {
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case SCNSM_EVENT_PORT_ONLINE:
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_sending_scr);
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bfa_fcs_port_scn_send_scr(scn, NULL);
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break;
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case SCNSM_EVENT_PORT_OFFLINE:
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break;
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default:
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bfa_sm_fault(scn->port->fcs, event);
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}
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}
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static void
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bfa_fcs_port_scn_sm_sending_scr(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event)
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{
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switch (event) {
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case SCNSM_EVENT_SCR_SENT:
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_scr);
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break;
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case SCNSM_EVENT_PORT_OFFLINE:
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_offline);
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bfa_fcxp_walloc_cancel(scn->port->fcs->bfa, &scn->fcxp_wqe);
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break;
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default:
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bfa_sm_fault(scn->port->fcs, event);
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}
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}
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static void
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bfa_fcs_port_scn_sm_scr(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event)
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{
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struct bfa_fcs_port_s *port = scn->port;
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switch (event) {
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case SCNSM_EVENT_RSP_OK:
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_online);
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break;
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case SCNSM_EVENT_RSP_ERROR:
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_scr_retry);
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bfa_timer_start(port->fcs->bfa, &scn->timer,
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bfa_fcs_port_scn_timeout, scn,
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BFA_FCS_RETRY_TIMEOUT);
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break;
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case SCNSM_EVENT_PORT_OFFLINE:
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_offline);
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bfa_fcxp_discard(scn->fcxp);
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break;
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default:
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bfa_sm_fault(scn->port->fcs, event);
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}
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}
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static void
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bfa_fcs_port_scn_sm_scr_retry(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event)
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{
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switch (event) {
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case SCNSM_EVENT_TIMEOUT:
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_sending_scr);
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bfa_fcs_port_scn_send_scr(scn, NULL);
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break;
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case SCNSM_EVENT_PORT_OFFLINE:
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_offline);
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bfa_timer_stop(&scn->timer);
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break;
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default:
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bfa_sm_fault(scn->port->fcs, event);
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}
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}
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static void
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bfa_fcs_port_scn_sm_online(struct bfa_fcs_port_scn_s *scn,
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enum port_scn_event event)
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{
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switch (event) {
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case SCNSM_EVENT_PORT_OFFLINE:
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_offline);
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break;
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default:
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bfa_sm_fault(scn->port->fcs, event);
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}
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}
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/**
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* fcs_scn_private FCS SCN private functions
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*/
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/**
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* This routine will be called to send a SCR command.
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*/
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static void
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bfa_fcs_port_scn_send_scr(void *scn_cbarg, struct bfa_fcxp_s *fcxp_alloced)
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{
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struct bfa_fcs_port_scn_s *scn = scn_cbarg;
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struct bfa_fcs_port_s *port = scn->port;
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struct fchs_s fchs;
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int len;
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struct bfa_fcxp_s *fcxp;
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bfa_trc(port->fcs, port->pid);
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bfa_trc(port->fcs, port->port_cfg.pwwn);
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fcxp = fcxp_alloced ? fcxp_alloced : bfa_fcs_fcxp_alloc(port->fcs);
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if (!fcxp) {
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bfa_fcxp_alloc_wait(port->fcs->bfa, &scn->fcxp_wqe,
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bfa_fcs_port_scn_send_scr, scn);
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return;
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}
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scn->fcxp = fcxp;
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/*
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* Handle VU registrations for Base port only
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*/
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if ((!port->vport) && bfa_ioc_get_fcmode(&port->fcs->bfa->ioc)) {
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len = fc_scr_build(&fchs, bfa_fcxp_get_reqbuf(fcxp),
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bfa_lps_is_brcd_fabric(port->fabric->lps),
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port->pid, 0);
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} else {
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len = fc_scr_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), BFA_FALSE,
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port->pid, 0);
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}
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bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
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FC_CLASS_3, len, &fchs, bfa_fcs_port_scn_scr_response,
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(void *)scn, FC_MAX_PDUSZ, FC_ELS_TOV);
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bfa_sm_send_event(scn, SCNSM_EVENT_SCR_SENT);
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}
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static void
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bfa_fcs_port_scn_scr_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
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void *cbarg, bfa_status_t req_status,
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u32 rsp_len, u32 resid_len,
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struct fchs_s *rsp_fchs)
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{
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struct bfa_fcs_port_scn_s *scn = (struct bfa_fcs_port_scn_s *)cbarg;
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struct bfa_fcs_port_s *port = scn->port;
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struct fc_els_cmd_s *els_cmd;
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struct fc_ls_rjt_s *ls_rjt;
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bfa_trc(port->fcs, port->port_cfg.pwwn);
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/*
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* Sanity Checks
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*/
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if (req_status != BFA_STATUS_OK) {
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bfa_trc(port->fcs, req_status);
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bfa_sm_send_event(scn, SCNSM_EVENT_RSP_ERROR);
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return;
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}
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els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
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switch (els_cmd->els_code) {
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case FC_ELS_ACC:
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bfa_sm_send_event(scn, SCNSM_EVENT_RSP_OK);
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break;
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case FC_ELS_LS_RJT:
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ls_rjt = (struct fc_ls_rjt_s *) BFA_FCXP_RSP_PLD(fcxp);
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bfa_trc(port->fcs, ls_rjt->reason_code);
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bfa_trc(port->fcs, ls_rjt->reason_code_expl);
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bfa_sm_send_event(scn, SCNSM_EVENT_RSP_ERROR);
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break;
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default:
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bfa_sm_send_event(scn, SCNSM_EVENT_RSP_ERROR);
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}
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}
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/*
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* Send a LS Accept
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*/
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static void
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bfa_fcs_port_scn_send_ls_acc(struct bfa_fcs_port_s *port,
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struct fchs_s *rx_fchs)
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{
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struct fchs_s fchs;
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struct bfa_fcxp_s *fcxp;
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struct bfa_rport_s *bfa_rport = NULL;
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int len;
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bfa_trc(port->fcs, rx_fchs->s_id);
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fcxp = bfa_fcs_fcxp_alloc(port->fcs);
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if (!fcxp)
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return;
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len = fc_ls_acc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), rx_fchs->s_id,
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bfa_fcs_port_get_fcid(port), rx_fchs->ox_id);
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bfa_fcxp_send(fcxp, bfa_rport, port->fabric->vf_id, port->lp_tag,
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BFA_FALSE, FC_CLASS_3, len, &fchs, NULL, NULL,
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FC_MAX_PDUSZ, 0);
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}
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/**
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* This routine will be called by bfa_timer on timer timeouts.
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*
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* param[in] vport - pointer to bfa_fcs_port_t.
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* param[out] vport_status - pointer to return vport status in
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*
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* return
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* void
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*
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* Special Considerations:
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*
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* note
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*/
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static void
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bfa_fcs_port_scn_timeout(void *arg)
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{
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struct bfa_fcs_port_scn_s *scn = (struct bfa_fcs_port_scn_s *)arg;
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bfa_sm_send_event(scn, SCNSM_EVENT_TIMEOUT);
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}
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/**
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* fcs_scn_public FCS state change notification public interfaces
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*/
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/*
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* Functions called by port/fab
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*/
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void
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bfa_fcs_port_scn_init(struct bfa_fcs_port_s *port)
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{
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struct bfa_fcs_port_scn_s *scn = BFA_FCS_GET_SCN_FROM_PORT(port);
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scn->port = port;
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bfa_sm_set_state(scn, bfa_fcs_port_scn_sm_offline);
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}
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void
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bfa_fcs_port_scn_offline(struct bfa_fcs_port_s *port)
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{
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struct bfa_fcs_port_scn_s *scn = BFA_FCS_GET_SCN_FROM_PORT(port);
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scn->port = port;
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bfa_sm_send_event(scn, SCNSM_EVENT_PORT_OFFLINE);
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}
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void
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bfa_fcs_port_scn_online(struct bfa_fcs_port_s *port)
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{
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struct bfa_fcs_port_scn_s *scn = BFA_FCS_GET_SCN_FROM_PORT(port);
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scn->port = port;
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bfa_sm_send_event(scn, SCNSM_EVENT_PORT_ONLINE);
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}
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static void
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bfa_fcs_port_scn_portid_rscn(struct bfa_fcs_port_s *port, u32 rpid)
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{
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struct bfa_fcs_rport_s *rport;
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bfa_trc(port->fcs, rpid);
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/**
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* If this is an unknown device, then it just came online.
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* Otherwise let rport handle the RSCN event.
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*/
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rport = bfa_fcs_port_get_rport_by_pid(port, rpid);
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if (rport == NULL) {
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/*
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* If min cfg mode is enabled, we donot need to
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* discover any new rports.
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*/
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if (!__fcs_min_cfg(port->fcs))
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rport = bfa_fcs_rport_create(port, rpid);
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} else {
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bfa_fcs_rport_scn(rport);
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}
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}
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/**
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* rscn format based PID comparison
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*/
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#define __fc_pid_match(__c0, __c1, __fmt) \
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(((__fmt) == FC_RSCN_FORMAT_FABRIC) || \
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(((__fmt) == FC_RSCN_FORMAT_DOMAIN) && \
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((__c0)[0] == (__c1)[0])) || \
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(((__fmt) == FC_RSCN_FORMAT_AREA) && \
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((__c0)[0] == (__c1)[0]) && \
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((__c0)[1] == (__c1)[1])))
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static void
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bfa_fcs_port_scn_multiport_rscn(struct bfa_fcs_port_s *port,
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enum fc_rscn_format format, u32 rscn_pid)
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{
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struct bfa_fcs_rport_s *rport;
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struct list_head *qe, *qe_next;
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u8 *c0, *c1;
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bfa_trc(port->fcs, format);
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bfa_trc(port->fcs, rscn_pid);
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c0 = (u8 *) &rscn_pid;
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list_for_each_safe(qe, qe_next, &port->rport_q) {
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rport = (struct bfa_fcs_rport_s *)qe;
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c1 = (u8 *) &rport->pid;
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if (__fc_pid_match(c0, c1, format))
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bfa_fcs_rport_scn(rport);
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}
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}
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void
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bfa_fcs_port_scn_process_rscn(struct bfa_fcs_port_s *port, struct fchs_s *fchs,
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u32 len)
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{
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struct fc_rscn_pl_s *rscn = (struct fc_rscn_pl_s *) (fchs + 1);
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int num_entries;
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u32 rscn_pid;
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bfa_boolean_t nsquery = BFA_FALSE;
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int i = 0;
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num_entries =
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(bfa_os_ntohs(rscn->payldlen) -
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sizeof(u32)) / sizeof(rscn->event[0]);
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bfa_trc(port->fcs, num_entries);
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port->stats.num_rscn++;
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bfa_fcs_port_scn_send_ls_acc(port, fchs);
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for (i = 0; i < num_entries; i++) {
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rscn_pid = rscn->event[i].portid;
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bfa_trc(port->fcs, rscn->event[i].format);
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bfa_trc(port->fcs, rscn_pid);
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switch (rscn->event[i].format) {
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case FC_RSCN_FORMAT_PORTID:
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if (rscn->event[i].qualifier == FC_QOS_RSCN_EVENT) {
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/*
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* Ignore this event. f/w would have processed
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* it
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*/
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bfa_trc(port->fcs, rscn_pid);
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} else {
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port->stats.num_portid_rscn++;
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bfa_fcs_port_scn_portid_rscn(port, rscn_pid);
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}
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break;
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case FC_RSCN_FORMAT_FABRIC:
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if (rscn->event[i].qualifier ==
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FC_FABRIC_NAME_RSCN_EVENT) {
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bfa_fcs_port_ms_fabric_rscn(port);
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break;
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}
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/*
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* !!!!!!!!! Fall Through !!!!!!!!!!!!!
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*/
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case FC_RSCN_FORMAT_AREA:
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case FC_RSCN_FORMAT_DOMAIN:
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nsquery = BFA_TRUE;
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bfa_fcs_port_scn_multiport_rscn(port,
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rscn->event[i].format,
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rscn_pid);
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break;
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default:
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bfa_assert(0);
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nsquery = BFA_TRUE;
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}
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}
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|
/**
|
|
* If any of area, domain or fabric RSCN is received, do a fresh discovery
|
|
* to find new devices.
|
|
*/
|
|
if (nsquery)
|
|
bfa_fcs_port_ns_query(port);
|
|
}
|
|
|
|
|