linux/drivers/scsi/bfa/bfa_lps.c
Jing Huang 7725ccfda5 [SCSI] bfa: Brocade BFA FC SCSI driver
Add new driver for Brocade Hardware

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-10-02 09:47:40 -05:00

783 lines
16 KiB
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.
*/
#include <bfa.h>
#include <bfi/bfi_lps.h>
#include <cs/bfa_debug.h>
BFA_TRC_FILE(HAL, LPS);
BFA_MODULE(lps);
#define BFA_LPS_MIN_LPORTS (1)
#define BFA_LPS_MAX_LPORTS (256)
/**
* forward declarations
*/
static void bfa_lps_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *ndm_len,
u32 *dm_len);
static void bfa_lps_attach(struct bfa_s *bfa, void *bfad,
struct bfa_iocfc_cfg_s *cfg,
struct bfa_meminfo_s *meminfo,
struct bfa_pcidev_s *pcidev);
static void bfa_lps_initdone(struct bfa_s *bfa);
static void bfa_lps_detach(struct bfa_s *bfa);
static void bfa_lps_start(struct bfa_s *bfa);
static void bfa_lps_stop(struct bfa_s *bfa);
static void bfa_lps_iocdisable(struct bfa_s *bfa);
static void bfa_lps_login_rsp(struct bfa_s *bfa,
struct bfi_lps_login_rsp_s *rsp);
static void bfa_lps_logout_rsp(struct bfa_s *bfa,
struct bfi_lps_logout_rsp_s *rsp);
static void bfa_lps_reqq_resume(void *lps_arg);
static void bfa_lps_free(struct bfa_lps_s *lps);
static void bfa_lps_send_login(struct bfa_lps_s *lps);
static void bfa_lps_send_logout(struct bfa_lps_s *lps);
static void bfa_lps_login_comp(struct bfa_lps_s *lps);
static void bfa_lps_logout_comp(struct bfa_lps_s *lps);
/**
* lps_pvt BFA LPS private functions
*/
enum bfa_lps_event {
BFA_LPS_SM_LOGIN = 1, /* login request from user */
BFA_LPS_SM_LOGOUT = 2, /* logout request from user */
BFA_LPS_SM_FWRSP = 3, /* f/w response to login/logout */
BFA_LPS_SM_RESUME = 4, /* space present in reqq queue */
BFA_LPS_SM_DELETE = 5, /* lps delete from user */
BFA_LPS_SM_OFFLINE = 6, /* Link is offline */
};
static void bfa_lps_sm_init(struct bfa_lps_s *lps, enum bfa_lps_event event);
static void bfa_lps_sm_login(struct bfa_lps_s *lps, enum bfa_lps_event event);
static void bfa_lps_sm_loginwait(struct bfa_lps_s *lps,
enum bfa_lps_event event);
static void bfa_lps_sm_online(struct bfa_lps_s *lps, enum bfa_lps_event event);
static void bfa_lps_sm_logout(struct bfa_lps_s *lps, enum bfa_lps_event event);
static void bfa_lps_sm_logowait(struct bfa_lps_s *lps,
enum bfa_lps_event event);
/**
* Init state -- no login
*/
static void
bfa_lps_sm_init(struct bfa_lps_s *lps, enum bfa_lps_event event)
{
bfa_trc(lps->bfa, lps->lp_tag);
bfa_trc(lps->bfa, event);
switch (event) {
case BFA_LPS_SM_LOGIN:
if (bfa_reqq_full(lps->bfa, lps->reqq)) {
bfa_sm_set_state(lps, bfa_lps_sm_loginwait);
bfa_reqq_wait(lps->bfa, lps->reqq, &lps->wqe);
} else {
bfa_sm_set_state(lps, bfa_lps_sm_login);
bfa_lps_send_login(lps);
}
break;
case BFA_LPS_SM_LOGOUT:
bfa_lps_logout_comp(lps);
break;
case BFA_LPS_SM_DELETE:
bfa_lps_free(lps);
break;
case BFA_LPS_SM_OFFLINE:
break;
case BFA_LPS_SM_FWRSP:
/* Could happen when fabric detects loopback and discards
* the lps request. Fw will eventually sent out the timeout
* Just ignore
*/
break;
default:
bfa_assert(0);
}
}
/**
* login is in progress -- awaiting response from firmware
*/
static void
bfa_lps_sm_login(struct bfa_lps_s *lps, enum bfa_lps_event event)
{
bfa_trc(lps->bfa, lps->lp_tag);
bfa_trc(lps->bfa, event);
switch (event) {
case BFA_LPS_SM_FWRSP:
if (lps->status == BFA_STATUS_OK)
bfa_sm_set_state(lps, bfa_lps_sm_online);
else
bfa_sm_set_state(lps, bfa_lps_sm_init);
bfa_lps_login_comp(lps);
break;
case BFA_LPS_SM_OFFLINE:
bfa_sm_set_state(lps, bfa_lps_sm_init);
break;
default:
bfa_assert(0);
}
}
/**
* login pending - awaiting space in request queue
*/
static void
bfa_lps_sm_loginwait(struct bfa_lps_s *lps, enum bfa_lps_event event)
{
bfa_trc(lps->bfa, lps->lp_tag);
bfa_trc(lps->bfa, event);
switch (event) {
case BFA_LPS_SM_RESUME:
bfa_sm_set_state(lps, bfa_lps_sm_login);
break;
case BFA_LPS_SM_OFFLINE:
bfa_sm_set_state(lps, bfa_lps_sm_init);
bfa_reqq_wcancel(&lps->wqe);
break;
default:
bfa_assert(0);
}
}
/**
* login complete
*/
static void
bfa_lps_sm_online(struct bfa_lps_s *lps, enum bfa_lps_event event)
{
bfa_trc(lps->bfa, lps->lp_tag);
bfa_trc(lps->bfa, event);
switch (event) {
case BFA_LPS_SM_LOGOUT:
if (bfa_reqq_full(lps->bfa, lps->reqq)) {
bfa_sm_set_state(lps, bfa_lps_sm_logowait);
bfa_reqq_wait(lps->bfa, lps->reqq, &lps->wqe);
} else {
bfa_sm_set_state(lps, bfa_lps_sm_logout);
bfa_lps_send_logout(lps);
}
break;
case BFA_LPS_SM_OFFLINE:
case BFA_LPS_SM_DELETE:
bfa_sm_set_state(lps, bfa_lps_sm_init);
break;
default:
bfa_assert(0);
}
}
/**
* logout in progress - awaiting firmware response
*/
static void
bfa_lps_sm_logout(struct bfa_lps_s *lps, enum bfa_lps_event event)
{
bfa_trc(lps->bfa, lps->lp_tag);
bfa_trc(lps->bfa, event);
switch (event) {
case BFA_LPS_SM_FWRSP:
bfa_sm_set_state(lps, bfa_lps_sm_init);
bfa_lps_logout_comp(lps);
break;
case BFA_LPS_SM_OFFLINE:
bfa_sm_set_state(lps, bfa_lps_sm_init);
break;
default:
bfa_assert(0);
}
}
/**
* logout pending -- awaiting space in request queue
*/
static void
bfa_lps_sm_logowait(struct bfa_lps_s *lps, enum bfa_lps_event event)
{
bfa_trc(lps->bfa, lps->lp_tag);
bfa_trc(lps->bfa, event);
switch (event) {
case BFA_LPS_SM_RESUME:
bfa_sm_set_state(lps, bfa_lps_sm_logout);
bfa_lps_send_logout(lps);
break;
case BFA_LPS_SM_OFFLINE:
bfa_sm_set_state(lps, bfa_lps_sm_init);
bfa_reqq_wcancel(&lps->wqe);
break;
default:
bfa_assert(0);
}
}
/**
* lps_pvt BFA LPS private functions
*/
/**
* return memory requirement
*/
static void
bfa_lps_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *ndm_len, u32 *dm_len)
{
if (cfg->drvcfg.min_cfg)
*ndm_len += sizeof(struct bfa_lps_s) * BFA_LPS_MIN_LPORTS;
else
*ndm_len += sizeof(struct bfa_lps_s) * BFA_LPS_MAX_LPORTS;
}
/**
* bfa module attach at initialization time
*/
static void
bfa_lps_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
struct bfa_meminfo_s *meminfo, struct bfa_pcidev_s *pcidev)
{
struct bfa_lps_mod_s *mod = BFA_LPS_MOD(bfa);
struct bfa_lps_s *lps;
int i;
bfa_os_memset(mod, 0, sizeof(struct bfa_lps_mod_s));
mod->num_lps = BFA_LPS_MAX_LPORTS;
if (cfg->drvcfg.min_cfg)
mod->num_lps = BFA_LPS_MIN_LPORTS;
else
mod->num_lps = BFA_LPS_MAX_LPORTS;
mod->lps_arr = lps = (struct bfa_lps_s *) bfa_meminfo_kva(meminfo);
bfa_meminfo_kva(meminfo) += mod->num_lps * sizeof(struct bfa_lps_s);
INIT_LIST_HEAD(&mod->lps_free_q);
INIT_LIST_HEAD(&mod->lps_active_q);
for (i = 0; i < mod->num_lps; i++, lps++) {
lps->bfa = bfa;
lps->lp_tag = (u8) i;
lps->reqq = BFA_REQQ_LPS;
bfa_reqq_winit(&lps->wqe, bfa_lps_reqq_resume, lps);
list_add_tail(&lps->qe, &mod->lps_free_q);
}
}
static void
bfa_lps_initdone(struct bfa_s *bfa)
{
}
static void
bfa_lps_detach(struct bfa_s *bfa)
{
}
static void
bfa_lps_start(struct bfa_s *bfa)
{
}
static void
bfa_lps_stop(struct bfa_s *bfa)
{
}
/**
* IOC in disabled state -- consider all lps offline
*/
static void
bfa_lps_iocdisable(struct bfa_s *bfa)
{
struct bfa_lps_mod_s *mod = BFA_LPS_MOD(bfa);
struct bfa_lps_s *lps;
struct list_head *qe, *qen;
list_for_each_safe(qe, qen, &mod->lps_active_q) {
lps = (struct bfa_lps_s *) qe;
bfa_sm_send_event(lps, BFA_LPS_SM_OFFLINE);
}
}
/**
* Firmware login response
*/
static void
bfa_lps_login_rsp(struct bfa_s *bfa, struct bfi_lps_login_rsp_s *rsp)
{
struct bfa_lps_mod_s *mod = BFA_LPS_MOD(bfa);
struct bfa_lps_s *lps;
bfa_assert(rsp->lp_tag < mod->num_lps);
lps = BFA_LPS_FROM_TAG(mod, rsp->lp_tag);
lps->status = rsp->status;
switch (rsp->status) {
case BFA_STATUS_OK:
lps->fport = rsp->f_port;
lps->npiv_en = rsp->npiv_en;
lps->lp_pid = rsp->lp_pid;
lps->pr_bbcred = bfa_os_ntohs(rsp->bb_credit);
lps->pr_pwwn = rsp->port_name;
lps->pr_nwwn = rsp->node_name;
lps->auth_req = rsp->auth_req;
lps->lp_mac = rsp->lp_mac;
lps->brcd_switch = rsp->brcd_switch;
lps->fcf_mac = rsp->fcf_mac;
break;
case BFA_STATUS_FABRIC_RJT:
lps->lsrjt_rsn = rsp->lsrjt_rsn;
lps->lsrjt_expl = rsp->lsrjt_expl;
break;
case BFA_STATUS_EPROTOCOL:
lps->ext_status = rsp->ext_status;
break;
default:
/* Nothing to do with other status */
break;
}
bfa_sm_send_event(lps, BFA_LPS_SM_FWRSP);
}
/**
* Firmware logout response
*/
static void
bfa_lps_logout_rsp(struct bfa_s *bfa, struct bfi_lps_logout_rsp_s *rsp)
{
struct bfa_lps_mod_s *mod = BFA_LPS_MOD(bfa);
struct bfa_lps_s *lps;
bfa_assert(rsp->lp_tag < mod->num_lps);
lps = BFA_LPS_FROM_TAG(mod, rsp->lp_tag);
bfa_sm_send_event(lps, BFA_LPS_SM_FWRSP);
}
/**
* Space is available in request queue, resume queueing request to firmware.
*/
static void
bfa_lps_reqq_resume(void *lps_arg)
{
struct bfa_lps_s *lps = lps_arg;
bfa_sm_send_event(lps, BFA_LPS_SM_RESUME);
}
/**
* lps is freed -- triggered by vport delete
*/
static void
bfa_lps_free(struct bfa_lps_s *lps)
{
struct bfa_lps_mod_s *mod = BFA_LPS_MOD(lps->bfa);
list_del(&lps->qe);
list_add_tail(&lps->qe, &mod->lps_free_q);
}
/**
* send login request to firmware
*/
static void
bfa_lps_send_login(struct bfa_lps_s *lps)
{
struct bfi_lps_login_req_s *m;
m = bfa_reqq_next(lps->bfa, lps->reqq);
bfa_assert(m);
bfi_h2i_set(m->mh, BFI_MC_LPS, BFI_LPS_H2I_LOGIN_REQ,
bfa_lpuid(lps->bfa));
m->lp_tag = lps->lp_tag;
m->alpa = lps->alpa;
m->pdu_size = bfa_os_htons(lps->pdusz);
m->pwwn = lps->pwwn;
m->nwwn = lps->nwwn;
m->fdisc = lps->fdisc;
m->auth_en = lps->auth_en;
bfa_reqq_produce(lps->bfa, lps->reqq);
}
/**
* send logout request to firmware
*/
static void
bfa_lps_send_logout(struct bfa_lps_s *lps)
{
struct bfi_lps_logout_req_s *m;
m = bfa_reqq_next(lps->bfa, lps->reqq);
bfa_assert(m);
bfi_h2i_set(m->mh, BFI_MC_LPS, BFI_LPS_H2I_LOGOUT_REQ,
bfa_lpuid(lps->bfa));
m->lp_tag = lps->lp_tag;
m->port_name = lps->pwwn;
bfa_reqq_produce(lps->bfa, lps->reqq);
}
/**
* Indirect login completion handler for non-fcs
*/
static void
bfa_lps_login_comp_cb(void *arg, bfa_boolean_t complete)
{
struct bfa_lps_s *lps = arg;
if (!complete)
return;
if (lps->fdisc)
bfa_cb_lps_fdisc_comp(lps->bfa->bfad, lps->uarg, lps->status);
else
bfa_cb_lps_flogi_comp(lps->bfa->bfad, lps->uarg, lps->status);
}
/**
* Login completion handler -- direct call for fcs, queue for others
*/
static void
bfa_lps_login_comp(struct bfa_lps_s *lps)
{
if (!lps->bfa->fcs) {
bfa_cb_queue(lps->bfa, &lps->hcb_qe,
bfa_lps_login_comp_cb, lps);
return;
}
if (lps->fdisc)
bfa_cb_lps_fdisc_comp(lps->bfa->bfad, lps->uarg, lps->status);
else
bfa_cb_lps_flogi_comp(lps->bfa->bfad, lps->uarg, lps->status);
}
/**
* Indirect logout completion handler for non-fcs
*/
static void
bfa_lps_logout_comp_cb(void *arg, bfa_boolean_t complete)
{
struct bfa_lps_s *lps = arg;
if (!complete)
return;
if (lps->fdisc)
bfa_cb_lps_fdisclogo_comp(lps->bfa->bfad, lps->uarg);
else
bfa_cb_lps_flogo_comp(lps->bfa->bfad, lps->uarg);
}
/**
* Logout completion handler -- direct call for fcs, queue for others
*/
static void
bfa_lps_logout_comp(struct bfa_lps_s *lps)
{
if (!lps->bfa->fcs) {
bfa_cb_queue(lps->bfa, &lps->hcb_qe,
bfa_lps_logout_comp_cb, lps);
return;
}
if (lps->fdisc)
bfa_cb_lps_fdisclogo_comp(lps->bfa->bfad, lps->uarg);
else
bfa_cb_lps_flogo_comp(lps->bfa->bfad, lps->uarg);
}
/**
* lps_public BFA LPS public functions
*/
/**
* Allocate a lport srvice tag.
*/
struct bfa_lps_s *
bfa_lps_alloc(struct bfa_s *bfa)
{
struct bfa_lps_mod_s *mod = BFA_LPS_MOD(bfa);
struct bfa_lps_s *lps = NULL;
bfa_q_deq(&mod->lps_free_q, &lps);
if (lps == NULL)
return NULL;
list_add_tail(&lps->qe, &mod->lps_active_q);
bfa_sm_set_state(lps, bfa_lps_sm_init);
return lps;
}
/**
* Free lport service tag. This can be called anytime after an alloc.
* No need to wait for any pending login/logout completions.
*/
void
bfa_lps_delete(struct bfa_lps_s *lps)
{
bfa_sm_send_event(lps, BFA_LPS_SM_DELETE);
}
/**
* Initiate a lport login.
*/
void
bfa_lps_flogi(struct bfa_lps_s *lps, void *uarg, u8 alpa, u16 pdusz,
wwn_t pwwn, wwn_t nwwn, bfa_boolean_t auth_en)
{
lps->uarg = uarg;
lps->alpa = alpa;
lps->pdusz = pdusz;
lps->pwwn = pwwn;
lps->nwwn = nwwn;
lps->fdisc = BFA_FALSE;
lps->auth_en = auth_en;
bfa_sm_send_event(lps, BFA_LPS_SM_LOGIN);
}
/**
* Initiate a lport fdisc login.
*/
void
bfa_lps_fdisc(struct bfa_lps_s *lps, void *uarg, u16 pdusz, wwn_t pwwn,
wwn_t nwwn)
{
lps->uarg = uarg;
lps->alpa = 0;
lps->pdusz = pdusz;
lps->pwwn = pwwn;
lps->nwwn = nwwn;
lps->fdisc = BFA_TRUE;
lps->auth_en = BFA_FALSE;
bfa_sm_send_event(lps, BFA_LPS_SM_LOGIN);
}
/**
* Initiate a lport logout (flogi).
*/
void
bfa_lps_flogo(struct bfa_lps_s *lps)
{
bfa_sm_send_event(lps, BFA_LPS_SM_LOGOUT);
}
/**
* Initiate a lport FDSIC logout.
*/
void
bfa_lps_fdisclogo(struct bfa_lps_s *lps)
{
bfa_sm_send_event(lps, BFA_LPS_SM_LOGOUT);
}
/**
* Discard a pending login request -- should be called only for
* link down handling.
*/
void
bfa_lps_discard(struct bfa_lps_s *lps)
{
bfa_sm_send_event(lps, BFA_LPS_SM_OFFLINE);
}
/**
* Return lport services tag
*/
u8
bfa_lps_get_tag(struct bfa_lps_s *lps)
{
return lps->lp_tag;
}
/**
* Return lport services tag given the pid
*/
u8
bfa_lps_get_tag_from_pid(struct bfa_s *bfa, u32 pid)
{
struct bfa_lps_mod_s *mod = BFA_LPS_MOD(bfa);
struct bfa_lps_s *lps;
int i;
for (i = 0, lps = mod->lps_arr; i < mod->num_lps; i++, lps++) {
if (lps->lp_pid == pid)
return lps->lp_tag;
}
/* Return base port tag anyway */
return 0;
}
/**
* return if fabric login indicates support for NPIV
*/
bfa_boolean_t
bfa_lps_is_npiv_en(struct bfa_lps_s *lps)
{
return lps->npiv_en;
}
/**
* Return TRUE if attached to F-Port, else return FALSE
*/
bfa_boolean_t
bfa_lps_is_fport(struct bfa_lps_s *lps)
{
return lps->fport;
}
/**
* Return TRUE if attached to a Brocade Fabric
*/
bfa_boolean_t
bfa_lps_is_brcd_fabric(struct bfa_lps_s *lps)
{
return lps->brcd_switch;
}
/**
* return TRUE if authentication is required
*/
bfa_boolean_t
bfa_lps_is_authreq(struct bfa_lps_s *lps)
{
return lps->auth_req;
}
bfa_eproto_status_t
bfa_lps_get_extstatus(struct bfa_lps_s *lps)
{
return lps->ext_status;
}
/**
* return port id assigned to the lport
*/
u32
bfa_lps_get_pid(struct bfa_lps_s *lps)
{
return lps->lp_pid;
}
/**
* Return bb_credit assigned in FLOGI response
*/
u16
bfa_lps_get_peer_bbcredit(struct bfa_lps_s *lps)
{
return lps->pr_bbcred;
}
/**
* Return peer port name
*/
wwn_t
bfa_lps_get_peer_pwwn(struct bfa_lps_s *lps)
{
return lps->pr_pwwn;
}
/**
* Return peer node name
*/
wwn_t
bfa_lps_get_peer_nwwn(struct bfa_lps_s *lps)
{
return lps->pr_nwwn;
}
/**
* return reason code if login request is rejected
*/
u8
bfa_lps_get_lsrjt_rsn(struct bfa_lps_s *lps)
{
return lps->lsrjt_rsn;
}
/**
* return explanation code if login request is rejected
*/
u8
bfa_lps_get_lsrjt_expl(struct bfa_lps_s *lps)
{
return lps->lsrjt_expl;
}
/**
* LPS firmware message class handler.
*/
void
bfa_lps_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
union bfi_lps_i2h_msg_u msg;
bfa_trc(bfa, m->mhdr.msg_id);
msg.msg = m;
switch (m->mhdr.msg_id) {
case BFI_LPS_H2I_LOGIN_RSP:
bfa_lps_login_rsp(bfa, msg.login_rsp);
break;
case BFI_LPS_H2I_LOGOUT_RSP:
bfa_lps_logout_rsp(bfa, msg.logout_rsp);
break;
default:
bfa_trc(bfa, m->mhdr.msg_id);
bfa_assert(0);
}
}