loop.c
/*
* Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
* All rights reserved
* www.brocade.com
*
* Linux driver for Brocade Fibre Channel Host Bus Adapter.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) Version 2 as
* published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
/**
* port_loop.c vport private loop implementation.
*/
#include <bfa.h>
#include <bfa_svc.h>
#include "fcs_lport.h"
#include "fcs_rport.h"
#include "fcs_trcmod.h"
#include "lport_priv.h"
BFA_TRC_FILE(FCS, LOOP);
/**
* ALPA to LIXA bitmap mapping
*
* ALPA 0x00 (Word 0, Bit 30) is invalid for N_Ports. Also Word 0 Bit 31
* is for L_bit (login required) and is filled as ALPA 0x00 here.
*/
static const u8 port_loop_alpa_map[] = {
0xEF, 0xE8, 0xE4, 0xE2, 0xE1, 0xE0, 0xDC, 0xDA, /* Word 3 Bits 0..7 */
0xD9, 0xD6, 0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xCE, /* Word 3 Bits 8..15 */
0xCD, 0xCC, 0xCB, 0xCA, 0xC9, 0xC7, 0xC6, 0xC5, /* Word 3 Bits 16..23 */
0xC3, 0xBC, 0xBA, 0xB9, 0xB6, 0xB5, 0xB4, 0xB3, /* Word 3 Bits 24..31 */
0xB2, 0xB1, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9, /* Word 2 Bits 0..7 */
0xA7, 0xA6, 0xA5, 0xA3, 0x9F, 0x9E, 0x9D, 0x9B, /* Word 2 Bits 8..15 */
0x98, 0x97, 0x90, 0x8F, 0x88, 0x84, 0x82, 0x81, /* Word 2 Bits 16..23 */
0x80, 0x7C, 0x7A, 0x79, 0x76, 0x75, 0x74, 0x73, /* Word 2 Bits 24..31 */
0x72, 0x71, 0x6E, 0x6D, 0x6C, 0x6B, 0x6A, 0x69, /* Word 1 Bits 0..7 */
0x67, 0x66, 0x65, 0x63, 0x5C, 0x5A, 0x59, 0x56, /* Word 1 Bits 8..15 */
0x55, 0x54, 0x53, 0x52, 0x51, 0x4E, 0x4D, 0x4C, /* Word 1 Bits 16..23 */
0x4B, 0x4A, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3C, /* Word 1 Bits 24..31 */
0x3A, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, /* Word 0 Bits 0..7 */
0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29, 0x27, 0x26, /* Word 0 Bits 8..15 */
0x25, 0x23, 0x1F, 0x1E, 0x1D, 0x1B, 0x18, 0x17, /* Word 0 Bits 16..23 */
0x10, 0x0F, 0x08, 0x04, 0x02, 0x01, 0x00, 0x00, /* Word 0 Bits 24..31 */
};
/*
* Local Functions
*/
static bfa_status_t bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port,
u8 alpa);
static void bfa_fcs_port_loop_plogi_response(void *fcsarg,
struct bfa_fcxp_s *fcxp,
void *cbarg,
bfa_status_t req_status,
u32 rsp_len,
u32 resid_len,
struct fchs_s *rsp_fchs);
/**
* Called by port to initializar in provate LOOP topology.
*/
void
bfa_fcs_port_loop_init(struct bfa_fcs_port_s *port)
{
}
/**
* Called by port to notify transition to online state.
*/
void
bfa_fcs_port_loop_online(struct bfa_fcs_port_s *port)
{
u8 num_alpa = port->port_topo.ploop.num_alpa;
u8 *alpa_pos_map = port->port_topo.ploop.alpa_pos_map;
struct bfa_fcs_rport_s *r_port;
int ii = 0;
/*
* If the port role is Initiator Mode, create Rports.
*/
if (port->port_cfg.roles == BFA_PORT_ROLE_FCP_IM) {
/*
* Check if the ALPA positional bitmap is available.
* if not, we send PLOGI to all possible ALPAs.
*/
if (num_alpa > 0) {
for (ii = 0; ii < num_alpa; ii++) {
/*
* ignore ALPA of bfa port
*/
if (alpa_pos_map[ii] != port->pid) {
r_port = bfa_fcs_rport_create(port,
alpa_pos_map[ii]);
}
}
} else {
for (ii = 0; ii < MAX_ALPA_COUNT; ii++) {
/*
* ignore ALPA of bfa port
*/
if ((port_loop_alpa_map[ii] > 0)
&& (port_loop_alpa_map[ii] != port->pid))
bfa_fcs_port_loop_send_plogi(port,
port_loop_alpa_map[ii]);
/**TBD */
}
}
} else {
/*
* TBD Target Mode ??
*/
}
}
/**
* Called by port to notify transition to offline state.
*/
void
bfa_fcs_port_loop_offline(struct bfa_fcs_port_s *port)
{
}
/**
* Called by port to notify a LIP on the loop.
*/
void
bfa_fcs_port_loop_lip(struct bfa_fcs_port_s *port)
{
}
/**
* Local Functions.
*/
static bfa_status_t
bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port, u8 alpa)
{
struct fchs_s fchs;
struct bfa_fcxp_s *fcxp = NULL;
int len;
bfa_trc(port->fcs, alpa);
fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
NULL);
bfa_assert(fcxp);
len = fc_plogi_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
bfa_fcs_port_get_fcid(port), 0,
port->port_cfg.pwwn, port->port_cfg.nwwn,
bfa_fcport_get_maxfrsize(port->fcs->bfa));
bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
FC_CLASS_3, len, &fchs,
bfa_fcs_port_loop_plogi_response, (void *)port,
FC_MAX_PDUSZ, FC_RA_TOV);
return BFA_STATUS_OK;
}
/**
* Called by fcxp to notify the Plogi response
*/
static void
bfa_fcs_port_loop_plogi_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
void *cbarg, bfa_status_t req_status,
u32 rsp_len, u32 resid_len,
struct fchs_s *rsp_fchs)
{
struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
struct fc_logi_s *plogi_resp;
struct fc_els_cmd_s *els_cmd;
bfa_trc(port->fcs, req_status);
/*
* Sanity Checks
*/
if (req_status != BFA_STATUS_OK) {
bfa_trc(port->fcs, req_status);
/*
* @todo
* This could mean that the device with this APLA does not
* exist on the loop.
*/
return;
}
els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
plogi_resp = (struct fc_logi_s *) els_cmd;
if (els_cmd->els_code == FC_ELS_ACC) {
bfa_fcs_rport_start(port, rsp_fchs, plogi_resp);
} else {
bfa_trc(port->fcs, plogi_resp->els_cmd.els_code);
bfa_assert(0);
}
}
