diff options
Diffstat (limited to 'drivers/scsi/bfa/bfa_lps.c')
| -rw-r--r-- | drivers/scsi/bfa/bfa_lps.c | 782 |
1 files changed, 782 insertions, 0 deletions
diff --git a/drivers/scsi/bfa/bfa_lps.c b/drivers/scsi/bfa/bfa_lps.c new file mode 100644 index 00000000000..9844b45412b --- /dev/null +++ b/drivers/scsi/bfa/bfa_lps.c @@ -0,0 +1,782 @@ +/* + * 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); + } +} + + |