release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/scsi/bfa/rport_api.c

   1 /*
   2  * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17 #include <bfa.h>
  18 #include <bfa_svc.h>
  19 #include "fcs_vport.h"
  20 #include "fcs_lport.h"
  21 #include "fcs_rport.h"
  22 #include "fcs_trcmod.h"
  23
  24 BFA_TRC_FILE(FCS, RPORT_API);
  25
  26 /**
  27  *  rport_api.c Remote port implementation.
  28  */
  29
  30 /**
  31  *  fcs_rport_api FCS rport API.
  32  */
  33
  34 /**
  35  *      Direct API to add a target by port wwn. This interface is used, for
  36  *      example, by bios when target pwwn is known from boot lun configuration.
  37  */
  38 bfa_status_t
  39 bfa_fcs_rport_add(struct bfa_fcs_port_s *port, wwn_t *pwwn,
  40                         struct bfa_fcs_rport_s *rport,
  41                         struct bfad_rport_s *rport_drv)
  42 {
  43         bfa_trc(port->fcs, *pwwn);
  44
  45         return BFA_STATUS_OK;
  46 }
  47
  48 /**
  49  *      Direct API to remove a target and its associated resources. This
  50  *      interface is used, for example, by vmware driver to remove target
  51  *      ports from the target list for a VM.
  52  */
  53 bfa_status_t
  54 bfa_fcs_rport_remove(struct bfa_fcs_rport_s *rport_in)
  55 {
  56
  57         struct bfa_fcs_rport_s *rport;
  58
  59         bfa_trc(rport_in->fcs, rport_in->pwwn);
  60
  61         rport = bfa_fcs_port_get_rport_by_pwwn(rport_in->port, rport_in->pwwn);
  62         if (rport == NULL) {
  63                 /*
  64                  * TBD Error handling
  65                  */
  66                 bfa_trc(rport_in->fcs, rport_in->pid);
  67                 return BFA_STATUS_UNKNOWN_RWWN;
  68         }
  69
  70         /*
  71          * TBD if this remote port is online, send a logo
  72          */
  73         return BFA_STATUS_OK;
  74
  75 }
  76
  77 /**
  78  *      Remote device status for display/debug.
  79  */
  80 void
  81 bfa_fcs_rport_get_attr(struct bfa_fcs_rport_s *rport,
  82                         struct bfa_rport_attr_s *rport_attr)
  83 {
  84         struct bfa_rport_qos_attr_s qos_attr;
  85         struct bfa_fcs_port_s *port = rport->port;
  86         enum bfa_pport_speed rport_speed = rport->rpf.rpsc_speed;
  87
  88         bfa_os_memset(rport_attr, 0, sizeof(struct bfa_rport_attr_s));
  89
  90         rport_attr->pid = rport->pid;
  91         rport_attr->pwwn = rport->pwwn;
  92         rport_attr->nwwn = rport->nwwn;
  93         rport_attr->cos_supported = rport->fc_cos;
  94         rport_attr->df_sz = rport->maxfrsize;
  95         rport_attr->state = bfa_fcs_rport_get_state(rport);
  96         rport_attr->fc_cos = rport->fc_cos;
  97         rport_attr->cisc = rport->cisc;
  98         rport_attr->scsi_function = rport->scsi_function;
  99         rport_attr->curr_speed  = rport->rpf.rpsc_speed;
 100         rport_attr->assigned_speed  = rport->rpf.assigned_speed;
 101
 102         bfa_rport_get_qos_attr(rport->bfa_rport, &qos_attr);
 103         rport_attr->qos_attr = qos_attr;
 104
 105         rport_attr->trl_enforced = BFA_FALSE;
 106
 107         if (bfa_fcport_is_ratelim(port->fcs->bfa)) {
 108                 if (rport_speed == BFA_PPORT_SPEED_UNKNOWN) {
 109                         /* Use default ratelim speed setting */
 110                         rport_speed =
 111                                 bfa_fcport_get_ratelim_speed(rport->fcs->bfa);
 112                 }
 113                 if (rport_speed < bfa_fcs_port_get_rport_max_speed(port))
 114                         rport_attr->trl_enforced = BFA_TRUE;
 115         }
 116
 117         /*
 118          * TODO
 119          * rport->symname
 120          */
 121 }
 122
 123 /**
 124  *      Per remote device statistics.
 125  */
 126 void
 127 bfa_fcs_rport_get_stats(struct bfa_fcs_rport_s *rport,
 128                         struct bfa_rport_stats_s *stats)
 129 {
 130         *stats = rport->stats;
 131 }
 132
 133 void
 134 bfa_fcs_rport_clear_stats(struct bfa_fcs_rport_s *rport)
 135 {
 136         bfa_os_memset((char *)&rport->stats, 0,
 137                         sizeof(struct bfa_rport_stats_s));
 138 }
 139
 140 struct bfa_fcs_rport_s *
 141 bfa_fcs_rport_lookup(struct bfa_fcs_port_s *port, wwn_t rpwwn)
 142 {
 143         struct bfa_fcs_rport_s *rport;
 144
 145         rport = bfa_fcs_port_get_rport_by_pwwn(port, rpwwn);
 146         if (rport == NULL) {
 147                 /*
 148                  * TBD Error handling
 149                  */
 150         }
 151
 152         return rport;
 153 }
 154
 155 struct bfa_fcs_rport_s *
 156 bfa_fcs_rport_lookup_by_nwwn(struct bfa_fcs_port_s *port, wwn_t rnwwn)
 157 {
 158         struct bfa_fcs_rport_s *rport;
 159
 160         rport = bfa_fcs_port_get_rport_by_nwwn(port, rnwwn);
 161         if (rport == NULL) {
 162                 /*
 163                  * TBD Error handling
 164                  */
 165         }
 166
 167         return rport;
 168 }
 169
 170 /*
 171  * This API is to set the Rport's speed. Should be used when RPSC is not
 172  * supported by the rport.
 173  */
 174 void
 175 bfa_fcs_rport_set_speed(struct bfa_fcs_rport_s *rport,
 176                         enum bfa_pport_speed speed)
 177 {
 178         rport->rpf.assigned_speed  = speed;
 179
 180         /* Set this speed in f/w only if the RPSC speed is not available */
 181         if (rport->rpf.rpsc_speed == BFA_PPORT_SPEED_UNKNOWN)
 182                 bfa_rport_speed(rport->bfa_rport, speed);
 183 }