142e9a92fSRobert Love /* 242e9a92fSRobert Love * Copyright(c) 2007 Intel Corporation. All rights reserved. 342e9a92fSRobert Love * 442e9a92fSRobert Love * This program is free software; you can redistribute it and/or modify it 542e9a92fSRobert Love * under the terms and conditions of the GNU General Public License, 642e9a92fSRobert Love * version 2, as published by the Free Software Foundation. 742e9a92fSRobert Love * 842e9a92fSRobert Love * This program is distributed in the hope it will be useful, but WITHOUT 942e9a92fSRobert Love * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1042e9a92fSRobert Love * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1142e9a92fSRobert Love * more details. 1242e9a92fSRobert Love * 1342e9a92fSRobert Love * You should have received a copy of the GNU General Public License along with 1442e9a92fSRobert Love * this program; if not, write to the Free Software Foundation, Inc., 1542e9a92fSRobert Love * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 1642e9a92fSRobert Love * 1742e9a92fSRobert Love * Maintained at www.Open-FCoE.org 1842e9a92fSRobert Love */ 1942e9a92fSRobert Love 2042e9a92fSRobert Love /* 2142e9a92fSRobert Love * PORT LOCKING NOTES 2242e9a92fSRobert Love * 2342e9a92fSRobert Love * These comments only apply to the 'port code' which consists of the lport, 2442e9a92fSRobert Love * disc and rport blocks. 2542e9a92fSRobert Love * 2642e9a92fSRobert Love * MOTIVATION 2742e9a92fSRobert Love * 2842e9a92fSRobert Love * The lport, disc and rport blocks all have mutexes that are used to protect 2942e9a92fSRobert Love * those objects. The main motivation for these locks is to prevent from 3042e9a92fSRobert Love * having an lport reset just before we send a frame. In that scenario the 3142e9a92fSRobert Love * lport's FID would get set to zero and then we'd send a frame with an 3242e9a92fSRobert Love * invalid SID. We also need to ensure that states don't change unexpectedly 3342e9a92fSRobert Love * while processing another state. 3442e9a92fSRobert Love * 3542e9a92fSRobert Love * HEIRARCHY 3642e9a92fSRobert Love * 3742e9a92fSRobert Love * The following heirarchy defines the locking rules. A greater lock 3842e9a92fSRobert Love * may be held before acquiring a lesser lock, but a lesser lock should never 3942e9a92fSRobert Love * be held while attempting to acquire a greater lock. Here is the heirarchy- 4042e9a92fSRobert Love * 4142e9a92fSRobert Love * lport > disc, lport > rport, disc > rport 4242e9a92fSRobert Love * 4342e9a92fSRobert Love * CALLBACKS 4442e9a92fSRobert Love * 4542e9a92fSRobert Love * The callbacks cause complications with this scheme. There is a callback 4642e9a92fSRobert Love * from the rport (to either lport or disc) and a callback from disc 4742e9a92fSRobert Love * (to the lport). 4842e9a92fSRobert Love * 4942e9a92fSRobert Love * As rports exit the rport state machine a callback is made to the owner of 5042e9a92fSRobert Love * the rport to notify success or failure. Since the callback is likely to 5142e9a92fSRobert Love * cause the lport or disc to grab its lock we cannot hold the rport lock 5242e9a92fSRobert Love * while making the callback. To ensure that the rport is not free'd while 5342e9a92fSRobert Love * processing the callback the rport callbacks are serialized through a 5442e9a92fSRobert Love * single-threaded workqueue. An rport would never be free'd while in a 5542e9a92fSRobert Love * callback handler becuase no other rport work in this queue can be executed 5642e9a92fSRobert Love * at the same time. 5742e9a92fSRobert Love * 5842e9a92fSRobert Love * When discovery succeeds or fails a callback is made to the lport as 5942e9a92fSRobert Love * notification. Currently, succesful discovery causes the lport to take no 6042e9a92fSRobert Love * action. A failure will cause the lport to reset. There is likely a circular 6142e9a92fSRobert Love * locking problem with this implementation. 6242e9a92fSRobert Love */ 6342e9a92fSRobert Love 6442e9a92fSRobert Love /* 6542e9a92fSRobert Love * LPORT LOCKING 6642e9a92fSRobert Love * 6742e9a92fSRobert Love * The critical sections protected by the lport's mutex are quite broad and 6842e9a92fSRobert Love * may be improved upon in the future. The lport code and its locking doesn't 6942e9a92fSRobert Love * influence the I/O path, so excessive locking doesn't penalize I/O 7042e9a92fSRobert Love * performance. 7142e9a92fSRobert Love * 7242e9a92fSRobert Love * The strategy is to lock whenever processing a request or response. Note 7342e9a92fSRobert Love * that every _enter_* function corresponds to a state change. They generally 7442e9a92fSRobert Love * change the lports state and then send a request out on the wire. We lock 7542e9a92fSRobert Love * before calling any of these functions to protect that state change. This 7642e9a92fSRobert Love * means that the entry points into the lport block manage the locks while 7742e9a92fSRobert Love * the state machine can transition between states (i.e. _enter_* functions) 7842e9a92fSRobert Love * while always staying protected. 7942e9a92fSRobert Love * 8042e9a92fSRobert Love * When handling responses we also hold the lport mutex broadly. When the 8142e9a92fSRobert Love * lport receives the response frame it locks the mutex and then calls the 8242e9a92fSRobert Love * appropriate handler for the particuar response. Generally a response will 8342e9a92fSRobert Love * trigger a state change and so the lock must already be held. 8442e9a92fSRobert Love * 8542e9a92fSRobert Love * Retries also have to consider the locking. The retries occur from a work 8642e9a92fSRobert Love * context and the work function will lock the lport and then retry the state 8742e9a92fSRobert Love * (i.e. _enter_* function). 8842e9a92fSRobert Love */ 8942e9a92fSRobert Love 9042e9a92fSRobert Love #include <linux/timer.h> 9142e9a92fSRobert Love #include <asm/unaligned.h> 9242e9a92fSRobert Love 9342e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 9442e9a92fSRobert Love 9542e9a92fSRobert Love #include <scsi/libfc.h> 9642e9a92fSRobert Love #include <scsi/fc_encode.h> 9742e9a92fSRobert Love 988866a5d9SRobert Love #include "fc_libfc.h" 998866a5d9SRobert Love 10042e9a92fSRobert Love /* Fabric IDs to use for point-to-point mode, chosen on whims. */ 10142e9a92fSRobert Love #define FC_LOCAL_PTP_FID_LO 0x010101 10242e9a92fSRobert Love #define FC_LOCAL_PTP_FID_HI 0x010102 10342e9a92fSRobert Love 10442e9a92fSRobert Love #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ 10542e9a92fSRobert Love 10642e9a92fSRobert Love static void fc_lport_error(struct fc_lport *, struct fc_frame *); 10742e9a92fSRobert Love 10842e9a92fSRobert Love static void fc_lport_enter_reset(struct fc_lport *); 10942e9a92fSRobert Love static void fc_lport_enter_flogi(struct fc_lport *); 11042e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *); 11142e9a92fSRobert Love static void fc_lport_enter_rpn_id(struct fc_lport *); 11242e9a92fSRobert Love static void fc_lport_enter_rft_id(struct fc_lport *); 11342e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *); 11442e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *); 11542e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *); 11642e9a92fSRobert Love 11742e9a92fSRobert Love static const char *fc_lport_state_names[] = { 118b1d9fd55SJoe Eykholt [LPORT_ST_DISABLED] = "disabled", 11942e9a92fSRobert Love [LPORT_ST_FLOGI] = "FLOGI", 12042e9a92fSRobert Love [LPORT_ST_DNS] = "dNS", 12142e9a92fSRobert Love [LPORT_ST_RPN_ID] = "RPN_ID", 12242e9a92fSRobert Love [LPORT_ST_RFT_ID] = "RFT_ID", 12342e9a92fSRobert Love [LPORT_ST_SCR] = "SCR", 12442e9a92fSRobert Love [LPORT_ST_READY] = "Ready", 12542e9a92fSRobert Love [LPORT_ST_LOGO] = "LOGO", 12642e9a92fSRobert Love [LPORT_ST_RESET] = "reset", 12742e9a92fSRobert Love }; 12842e9a92fSRobert Love 12942e9a92fSRobert Love static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) 13042e9a92fSRobert Love { 13142e9a92fSRobert Love fc_frame_free(fp); 13242e9a92fSRobert Love return 0; 13342e9a92fSRobert Love } 13442e9a92fSRobert Love 13542e9a92fSRobert Love /** 13634f42a07SRobert Love * fc_lport_rport_callback() - Event handler for rport events 13742e9a92fSRobert Love * @lport: The lport which is receiving the event 1389fb9d328SJoe Eykholt * @rdata: private remote port data 13942e9a92fSRobert Love * @event: The event that occured 14042e9a92fSRobert Love * 14142e9a92fSRobert Love * Locking Note: The rport lock should not be held when calling 14242e9a92fSRobert Love * this function. 14342e9a92fSRobert Love */ 14442e9a92fSRobert Love static void fc_lport_rport_callback(struct fc_lport *lport, 1459fb9d328SJoe Eykholt struct fc_rport_priv *rdata, 14642e9a92fSRobert Love enum fc_rport_event event) 14742e9a92fSRobert Love { 1487414705eSRobert Love FC_LPORT_DBG(lport, "Received a %d event for port (%6x)\n", event, 149f211fa51SJoe Eykholt rdata->ids.port_id); 15042e9a92fSRobert Love 151b5cbf083SJoe Eykholt mutex_lock(&lport->lp_mutex); 15242e9a92fSRobert Love switch (event) { 1534c0f62b5SJoe Eykholt case RPORT_EV_READY: 15442e9a92fSRobert Love if (lport->state == LPORT_ST_DNS) { 1559fb9d328SJoe Eykholt lport->dns_rp = rdata; 15642e9a92fSRobert Love fc_lport_enter_rpn_id(lport); 15742e9a92fSRobert Love } else { 1584c0f62b5SJoe Eykholt FC_LPORT_DBG(lport, "Received an READY event " 1597414705eSRobert Love "on port (%6x) for the directory " 16042e9a92fSRobert Love "server, but the lport is not " 16142e9a92fSRobert Love "in the DNS state, it's in the " 162f211fa51SJoe Eykholt "%d state", rdata->ids.port_id, 16342e9a92fSRobert Love lport->state); 1649fb9d328SJoe Eykholt lport->tt.rport_logoff(rdata); 16542e9a92fSRobert Love } 16642e9a92fSRobert Love break; 16742e9a92fSRobert Love case RPORT_EV_LOGO: 16842e9a92fSRobert Love case RPORT_EV_FAILED: 16942e9a92fSRobert Love case RPORT_EV_STOP: 17042e9a92fSRobert Love lport->dns_rp = NULL; 17142e9a92fSRobert Love break; 17242e9a92fSRobert Love case RPORT_EV_NONE: 17342e9a92fSRobert Love break; 17442e9a92fSRobert Love } 175b5cbf083SJoe Eykholt mutex_unlock(&lport->lp_mutex); 17642e9a92fSRobert Love } 17742e9a92fSRobert Love 17842e9a92fSRobert Love /** 17934f42a07SRobert Love * fc_lport_state() - Return a string which represents the lport's state 18042e9a92fSRobert Love * @lport: The lport whose state is to converted to a string 18142e9a92fSRobert Love */ 18242e9a92fSRobert Love static const char *fc_lport_state(struct fc_lport *lport) 18342e9a92fSRobert Love { 18442e9a92fSRobert Love const char *cp; 18542e9a92fSRobert Love 18642e9a92fSRobert Love cp = fc_lport_state_names[lport->state]; 18742e9a92fSRobert Love if (!cp) 18842e9a92fSRobert Love cp = "unknown"; 18942e9a92fSRobert Love return cp; 19042e9a92fSRobert Love } 19142e9a92fSRobert Love 19242e9a92fSRobert Love /** 19334f42a07SRobert Love * fc_lport_ptp_setup() - Create an rport for point-to-point mode 19442e9a92fSRobert Love * @lport: The lport to attach the ptp rport to 19542e9a92fSRobert Love * @fid: The FID of the ptp rport 19642e9a92fSRobert Love * @remote_wwpn: The WWPN of the ptp rport 19742e9a92fSRobert Love * @remote_wwnn: The WWNN of the ptp rport 19842e9a92fSRobert Love */ 19942e9a92fSRobert Love static void fc_lport_ptp_setup(struct fc_lport *lport, 20042e9a92fSRobert Love u32 remote_fid, u64 remote_wwpn, 20142e9a92fSRobert Love u64 remote_wwnn) 20242e9a92fSRobert Love { 20348f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 20448f00902SJoe Eykholt if (lport->ptp_rp) 20542e9a92fSRobert Love lport->tt.rport_logoff(lport->ptp_rp); 2069737e6a7SRobert Love lport->ptp_rp = lport->tt.rport_create(lport, remote_fid); 2079737e6a7SRobert Love lport->ptp_rp->ids.port_name = remote_wwpn; 2089737e6a7SRobert Love lport->ptp_rp->ids.node_name = remote_wwnn; 20948f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 21042e9a92fSRobert Love 21142e9a92fSRobert Love lport->tt.rport_login(lport->ptp_rp); 21242e9a92fSRobert Love 21342e9a92fSRobert Love fc_lport_enter_ready(lport); 21442e9a92fSRobert Love } 21542e9a92fSRobert Love 21642e9a92fSRobert Love void fc_get_host_port_type(struct Scsi_Host *shost) 21742e9a92fSRobert Love { 21842e9a92fSRobert Love /* TODO - currently just NPORT */ 21942e9a92fSRobert Love fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 22042e9a92fSRobert Love } 22142e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_type); 22242e9a92fSRobert Love 22342e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost) 22442e9a92fSRobert Love { 22542e9a92fSRobert Love struct fc_lport *lp = shost_priv(shost); 22642e9a92fSRobert Love 227bc0e17f6SVasu Dev if (lp->link_up) 22842e9a92fSRobert Love fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 22942e9a92fSRobert Love else 23042e9a92fSRobert Love fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 23142e9a92fSRobert Love } 23242e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_state); 23342e9a92fSRobert Love 23442e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost) 23542e9a92fSRobert Love { 23642e9a92fSRobert Love struct fc_lport *lport = shost_priv(shost); 23742e9a92fSRobert Love 23842e9a92fSRobert Love fc_host_speed(shost) = lport->link_speed; 23942e9a92fSRobert Love } 24042e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_speed); 24142e9a92fSRobert Love 24242e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) 24342e9a92fSRobert Love { 24442e9a92fSRobert Love struct fc_host_statistics *fcoe_stats; 24542e9a92fSRobert Love struct fc_lport *lp = shost_priv(shost); 24642e9a92fSRobert Love struct timespec v0, v1; 247582b45bcSRobert Love unsigned int cpu; 24842e9a92fSRobert Love 24942e9a92fSRobert Love fcoe_stats = &lp->host_stats; 25042e9a92fSRobert Love memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); 25142e9a92fSRobert Love 25242e9a92fSRobert Love jiffies_to_timespec(jiffies, &v0); 25342e9a92fSRobert Love jiffies_to_timespec(lp->boot_time, &v1); 25442e9a92fSRobert Love fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); 25542e9a92fSRobert Love 256582b45bcSRobert Love for_each_possible_cpu(cpu) { 257582b45bcSRobert Love struct fcoe_dev_stats *stats; 258582b45bcSRobert Love 259582b45bcSRobert Love stats = per_cpu_ptr(lp->dev_stats, cpu); 260582b45bcSRobert Love 26142e9a92fSRobert Love fcoe_stats->tx_frames += stats->TxFrames; 26242e9a92fSRobert Love fcoe_stats->tx_words += stats->TxWords; 26342e9a92fSRobert Love fcoe_stats->rx_frames += stats->RxFrames; 26442e9a92fSRobert Love fcoe_stats->rx_words += stats->RxWords; 26542e9a92fSRobert Love fcoe_stats->error_frames += stats->ErrorFrames; 26642e9a92fSRobert Love fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; 26742e9a92fSRobert Love fcoe_stats->fcp_input_requests += stats->InputRequests; 26842e9a92fSRobert Love fcoe_stats->fcp_output_requests += stats->OutputRequests; 26942e9a92fSRobert Love fcoe_stats->fcp_control_requests += stats->ControlRequests; 27042e9a92fSRobert Love fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; 27142e9a92fSRobert Love fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; 27242e9a92fSRobert Love fcoe_stats->link_failure_count += stats->LinkFailureCount; 27342e9a92fSRobert Love } 27442e9a92fSRobert Love fcoe_stats->lip_count = -1; 27542e9a92fSRobert Love fcoe_stats->nos_count = -1; 27642e9a92fSRobert Love fcoe_stats->loss_of_sync_count = -1; 27742e9a92fSRobert Love fcoe_stats->loss_of_signal_count = -1; 27842e9a92fSRobert Love fcoe_stats->prim_seq_protocol_err_count = -1; 27942e9a92fSRobert Love fcoe_stats->dumped_frames = -1; 28042e9a92fSRobert Love return fcoe_stats; 28142e9a92fSRobert Love } 28242e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_stats); 28342e9a92fSRobert Love 28442e9a92fSRobert Love /* 28542e9a92fSRobert Love * Fill in FLOGI command for request. 28642e9a92fSRobert Love */ 28742e9a92fSRobert Love static void 28842e9a92fSRobert Love fc_lport_flogi_fill(struct fc_lport *lport, struct fc_els_flogi *flogi, 28942e9a92fSRobert Love unsigned int op) 29042e9a92fSRobert Love { 29142e9a92fSRobert Love struct fc_els_csp *sp; 29242e9a92fSRobert Love struct fc_els_cssp *cp; 29342e9a92fSRobert Love 29442e9a92fSRobert Love memset(flogi, 0, sizeof(*flogi)); 29542e9a92fSRobert Love flogi->fl_cmd = (u8) op; 29642e9a92fSRobert Love put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); 29742e9a92fSRobert Love put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); 29842e9a92fSRobert Love sp = &flogi->fl_csp; 29942e9a92fSRobert Love sp->sp_hi_ver = 0x20; 30042e9a92fSRobert Love sp->sp_lo_ver = 0x20; 30142e9a92fSRobert Love sp->sp_bb_cred = htons(10); /* this gets set by gateway */ 30242e9a92fSRobert Love sp->sp_bb_data = htons((u16) lport->mfs); 30342e9a92fSRobert Love cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ 30442e9a92fSRobert Love cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); 30542e9a92fSRobert Love if (op != ELS_FLOGI) { 30642e9a92fSRobert Love sp->sp_features = htons(FC_SP_FT_CIRO); 30742e9a92fSRobert Love sp->sp_tot_seq = htons(255); /* seq. we accept */ 30842e9a92fSRobert Love sp->sp_rel_off = htons(0x1f); 30942e9a92fSRobert Love sp->sp_e_d_tov = htonl(lport->e_d_tov); 31042e9a92fSRobert Love 31142e9a92fSRobert Love cp->cp_rdfs = htons((u16) lport->mfs); 31242e9a92fSRobert Love cp->cp_con_seq = htons(255); 31342e9a92fSRobert Love cp->cp_open_seq = 1; 31442e9a92fSRobert Love } 31542e9a92fSRobert Love } 31642e9a92fSRobert Love 31742e9a92fSRobert Love /* 31842e9a92fSRobert Love * Add a supported FC-4 type. 31942e9a92fSRobert Love */ 32042e9a92fSRobert Love static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) 32142e9a92fSRobert Love { 32242e9a92fSRobert Love __be32 *mp; 32342e9a92fSRobert Love 32442e9a92fSRobert Love mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; 32542e9a92fSRobert Love *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); 32642e9a92fSRobert Love } 32742e9a92fSRobert Love 32842e9a92fSRobert Love /** 32934f42a07SRobert Love * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. 33042e9a92fSRobert Love * @lport: Fibre Channel local port recieving the RLIR 33142e9a92fSRobert Love * @sp: current sequence in the RLIR exchange 33242e9a92fSRobert Love * @fp: RLIR request frame 33342e9a92fSRobert Love * 3341b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 33542e9a92fSRobert Love * this function. 33642e9a92fSRobert Love */ 33742e9a92fSRobert Love static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, 33842e9a92fSRobert Love struct fc_lport *lport) 33942e9a92fSRobert Love { 3407414705eSRobert Love FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", 34142e9a92fSRobert Love fc_lport_state(lport)); 34242e9a92fSRobert Love 34342e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 34442e9a92fSRobert Love fc_frame_free(fp); 34542e9a92fSRobert Love } 34642e9a92fSRobert Love 34742e9a92fSRobert Love /** 34834f42a07SRobert Love * fc_lport_recv_echo_req() - Handle received ECHO request 34942e9a92fSRobert Love * @lport: Fibre Channel local port recieving the ECHO 35042e9a92fSRobert Love * @sp: current sequence in the ECHO exchange 35142e9a92fSRobert Love * @fp: ECHO request frame 35242e9a92fSRobert Love * 3531b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 35442e9a92fSRobert Love * this function. 35542e9a92fSRobert Love */ 35642e9a92fSRobert Love static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp, 35742e9a92fSRobert Love struct fc_lport *lport) 35842e9a92fSRobert Love { 35942e9a92fSRobert Love struct fc_frame *fp; 36042e9a92fSRobert Love struct fc_exch *ep = fc_seq_exch(sp); 36142e9a92fSRobert Love unsigned int len; 36242e9a92fSRobert Love void *pp; 36342e9a92fSRobert Love void *dp; 36442e9a92fSRobert Love u32 f_ctl; 36542e9a92fSRobert Love 3661b69bc06SJoe Eykholt FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", 36742e9a92fSRobert Love fc_lport_state(lport)); 36842e9a92fSRobert Love 36942e9a92fSRobert Love len = fr_len(in_fp) - sizeof(struct fc_frame_header); 37042e9a92fSRobert Love pp = fc_frame_payload_get(in_fp, len); 37142e9a92fSRobert Love 37242e9a92fSRobert Love if (len < sizeof(__be32)) 37342e9a92fSRobert Love len = sizeof(__be32); 37442e9a92fSRobert Love 37542e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 37642e9a92fSRobert Love if (fp) { 37742e9a92fSRobert Love dp = fc_frame_payload_get(fp, len); 37842e9a92fSRobert Love memcpy(dp, pp, len); 3791b69bc06SJoe Eykholt *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); 38042e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 38142e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 38242e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 38342e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 38442e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 38542e9a92fSRobert Love } 38642e9a92fSRobert Love fc_frame_free(in_fp); 38742e9a92fSRobert Love } 38842e9a92fSRobert Love 38942e9a92fSRobert Love /** 3901b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 3911b69bc06SJoe Eykholt * @sp: The sequence in the RNID exchange 3921b69bc06SJoe Eykholt * @fp: The RNID request frame 3931b69bc06SJoe Eykholt * @lport: The local port recieving the RNID 39442e9a92fSRobert Love * 3951b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 39642e9a92fSRobert Love * this function. 39742e9a92fSRobert Love */ 39842e9a92fSRobert Love static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, 39942e9a92fSRobert Love struct fc_lport *lport) 40042e9a92fSRobert Love { 40142e9a92fSRobert Love struct fc_frame *fp; 40242e9a92fSRobert Love struct fc_exch *ep = fc_seq_exch(sp); 40342e9a92fSRobert Love struct fc_els_rnid *req; 40442e9a92fSRobert Love struct { 40542e9a92fSRobert Love struct fc_els_rnid_resp rnid; 40642e9a92fSRobert Love struct fc_els_rnid_cid cid; 40742e9a92fSRobert Love struct fc_els_rnid_gen gen; 40842e9a92fSRobert Love } *rp; 40942e9a92fSRobert Love struct fc_seq_els_data rjt_data; 41042e9a92fSRobert Love u8 fmt; 41142e9a92fSRobert Love size_t len; 41242e9a92fSRobert Love u32 f_ctl; 41342e9a92fSRobert Love 4147414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 41542e9a92fSRobert Love fc_lport_state(lport)); 41642e9a92fSRobert Love 41742e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 41842e9a92fSRobert Love if (!req) { 41942e9a92fSRobert Love rjt_data.fp = NULL; 42042e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 42142e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 42242e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); 42342e9a92fSRobert Love } else { 42442e9a92fSRobert Love fmt = req->rnid_fmt; 42542e9a92fSRobert Love len = sizeof(*rp); 42642e9a92fSRobert Love if (fmt != ELS_RNIDF_GEN || 42742e9a92fSRobert Love ntohl(lport->rnid_gen.rnid_atype) == 0) { 42842e9a92fSRobert Love fmt = ELS_RNIDF_NONE; /* nothing to provide */ 42942e9a92fSRobert Love len -= sizeof(rp->gen); 43042e9a92fSRobert Love } 43142e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 43242e9a92fSRobert Love if (fp) { 43342e9a92fSRobert Love rp = fc_frame_payload_get(fp, len); 43442e9a92fSRobert Love memset(rp, 0, len); 43542e9a92fSRobert Love rp->rnid.rnid_cmd = ELS_LS_ACC; 43642e9a92fSRobert Love rp->rnid.rnid_fmt = fmt; 43742e9a92fSRobert Love rp->rnid.rnid_cid_len = sizeof(rp->cid); 43842e9a92fSRobert Love rp->cid.rnid_wwpn = htonll(lport->wwpn); 43942e9a92fSRobert Love rp->cid.rnid_wwnn = htonll(lport->wwnn); 44042e9a92fSRobert Love if (fmt == ELS_RNIDF_GEN) { 44142e9a92fSRobert Love rp->rnid.rnid_sid_len = sizeof(rp->gen); 44242e9a92fSRobert Love memcpy(&rp->gen, &lport->rnid_gen, 44342e9a92fSRobert Love sizeof(rp->gen)); 44442e9a92fSRobert Love } 44542e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 44642e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; 44742e9a92fSRobert Love f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; 44842e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 44942e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 45042e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 45142e9a92fSRobert Love } 45242e9a92fSRobert Love } 45342e9a92fSRobert Love fc_frame_free(in_fp); 45442e9a92fSRobert Love } 45542e9a92fSRobert Love 45642e9a92fSRobert Love /** 45734f42a07SRobert Love * fc_lport_recv_logo_req() - Handle received fabric LOGO request 45842e9a92fSRobert Love * @lport: Fibre Channel local port recieving the LOGO 45942e9a92fSRobert Love * @sp: current sequence in the LOGO exchange 46042e9a92fSRobert Love * @fp: LOGO request frame 46142e9a92fSRobert Love * 46242e9a92fSRobert Love * Locking Note: The lport lock is exected to be held before calling 46342e9a92fSRobert Love * this function. 46442e9a92fSRobert Love */ 46542e9a92fSRobert Love static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, 46642e9a92fSRobert Love struct fc_lport *lport) 46742e9a92fSRobert Love { 46842e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 46942e9a92fSRobert Love fc_lport_enter_reset(lport); 47042e9a92fSRobert Love fc_frame_free(fp); 47142e9a92fSRobert Love } 47242e9a92fSRobert Love 47342e9a92fSRobert Love /** 47434f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 47542e9a92fSRobert Love * @lport: The lport that should log into the fabric 47642e9a92fSRobert Love * 47742e9a92fSRobert Love * Locking Note: This function should not be called 47842e9a92fSRobert Love * with the lport lock held. 47942e9a92fSRobert Love */ 48042e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 48142e9a92fSRobert Love { 48242e9a92fSRobert Love int rc = -1; 48342e9a92fSRobert Love 48442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 485b1d9fd55SJoe Eykholt if (lport->state == LPORT_ST_DISABLED) { 48642e9a92fSRobert Love fc_lport_enter_reset(lport); 48742e9a92fSRobert Love rc = 0; 48842e9a92fSRobert Love } 48942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 49042e9a92fSRobert Love 49142e9a92fSRobert Love return rc; 49242e9a92fSRobert Love } 49342e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 49442e9a92fSRobert Love 49542e9a92fSRobert Love /** 49634f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 49742e9a92fSRobert Love * @lport: The lport whose link is up 49842e9a92fSRobert Love */ 49942e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 50042e9a92fSRobert Love { 5017414705eSRobert Love printk(KERN_INFO "libfc: Link up on port (%6x)\n", 50242e9a92fSRobert Love fc_host_port_id(lport->host)); 50342e9a92fSRobert Love 50442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 505bc0e17f6SVasu Dev if (!lport->link_up) { 506bc0e17f6SVasu Dev lport->link_up = 1; 50742e9a92fSRobert Love 50842e9a92fSRobert Love if (lport->state == LPORT_ST_RESET) 50942e9a92fSRobert Love fc_lport_enter_flogi(lport); 51042e9a92fSRobert Love } 51142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 51242e9a92fSRobert Love } 51342e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 51442e9a92fSRobert Love 51542e9a92fSRobert Love /** 51634f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 51742e9a92fSRobert Love * @lport: The lport whose link is down 51842e9a92fSRobert Love */ 51942e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 52042e9a92fSRobert Love { 52142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5227414705eSRobert Love printk(KERN_INFO "libfc: Link down on port (%6x)\n", 52342e9a92fSRobert Love fc_host_port_id(lport->host)); 52442e9a92fSRobert Love 525bc0e17f6SVasu Dev if (lport->link_up) { 526bc0e17f6SVasu Dev lport->link_up = 0; 52742e9a92fSRobert Love fc_lport_enter_reset(lport); 52842e9a92fSRobert Love lport->tt.fcp_cleanup(lport); 52942e9a92fSRobert Love } 53042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 53142e9a92fSRobert Love } 53242e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 53342e9a92fSRobert Love 53442e9a92fSRobert Love /** 53534f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 53642e9a92fSRobert Love * @lport: fc_lport pointer to logoff the fabric 53742e9a92fSRobert Love * 53842e9a92fSRobert Love * Return value: 53942e9a92fSRobert Love * 0 for success, -1 for failure 54034f42a07SRobert Love */ 54142e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 54242e9a92fSRobert Love { 54342e9a92fSRobert Love lport->tt.disc_stop_final(lport); 54442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 545a0fd2e49SAbhijeet Joglekar if (lport->dns_rp) 546a0fd2e49SAbhijeet Joglekar lport->tt.rport_logoff(lport->dns_rp); 547a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 548a0fd2e49SAbhijeet Joglekar lport->tt.rport_flush_queue(); 549a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 55042e9a92fSRobert Love fc_lport_enter_logo(lport); 55142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 552f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 55342e9a92fSRobert Love return 0; 55442e9a92fSRobert Love } 55542e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 55642e9a92fSRobert Love 55742e9a92fSRobert Love /** 55834f42a07SRobert Love * fc_lport_destroy() - unregister a fc_lport 55942e9a92fSRobert Love * @lport: fc_lport pointer to unregister 56042e9a92fSRobert Love * 56142e9a92fSRobert Love * Return value: 56242e9a92fSRobert Love * None 56342e9a92fSRobert Love * Note: 56442e9a92fSRobert Love * exit routine for fc_lport instance 56542e9a92fSRobert Love * clean-up all the allocated memory 56642e9a92fSRobert Love * and free up other system resources. 56742e9a92fSRobert Love * 56834f42a07SRobert Love */ 56942e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 57042e9a92fSRobert Love { 571bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 572b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 573bbf15669SAbhijeet Joglekar lport->link_up = 0; 57442e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 575bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 576bbf15669SAbhijeet Joglekar 57742e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 578e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 5791f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 58042e9a92fSRobert Love return 0; 58142e9a92fSRobert Love } 58242e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 58342e9a92fSRobert Love 58442e9a92fSRobert Love /** 58534f42a07SRobert Love * fc_set_mfs() - sets up the mfs for the corresponding fc_lport 58642e9a92fSRobert Love * @lport: fc_lport pointer to unregister 58742e9a92fSRobert Love * @mfs: the new mfs for fc_lport 58842e9a92fSRobert Love * 58942e9a92fSRobert Love * Set mfs for the given fc_lport to the new mfs. 59042e9a92fSRobert Love * 59142e9a92fSRobert Love * Return: 0 for success 59234f42a07SRobert Love */ 59342e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 59442e9a92fSRobert Love { 59542e9a92fSRobert Love unsigned int old_mfs; 59642e9a92fSRobert Love int rc = -EINVAL; 59742e9a92fSRobert Love 59842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 59942e9a92fSRobert Love 60042e9a92fSRobert Love old_mfs = lport->mfs; 60142e9a92fSRobert Love 60242e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 60342e9a92fSRobert Love mfs &= ~3; 60442e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 60542e9a92fSRobert Love mfs = FC_MAX_FRAME; 60642e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 60742e9a92fSRobert Love lport->mfs = mfs; 60842e9a92fSRobert Love rc = 0; 60942e9a92fSRobert Love } 61042e9a92fSRobert Love 61142e9a92fSRobert Love if (!rc && mfs < old_mfs) 61242e9a92fSRobert Love fc_lport_enter_reset(lport); 61342e9a92fSRobert Love 61442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 61542e9a92fSRobert Love 61642e9a92fSRobert Love return rc; 61742e9a92fSRobert Love } 61842e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 61942e9a92fSRobert Love 62042e9a92fSRobert Love /** 62134f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 62242e9a92fSRobert Love * @lport: FC local port 62342e9a92fSRobert Love * @event: The discovery event 62442e9a92fSRobert Love */ 62542e9a92fSRobert Love void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) 62642e9a92fSRobert Love { 62742e9a92fSRobert Love switch (event) { 62842e9a92fSRobert Love case DISC_EV_SUCCESS: 6297414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 63042e9a92fSRobert Love break; 63142e9a92fSRobert Love case DISC_EV_FAILED: 6327414705eSRobert Love printk(KERN_ERR "libfc: Discovery failed for port (%6x)\n", 63342e9a92fSRobert Love fc_host_port_id(lport->host)); 63442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 63542e9a92fSRobert Love fc_lport_enter_reset(lport); 63642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 63742e9a92fSRobert Love break; 63842e9a92fSRobert Love case DISC_EV_NONE: 63942e9a92fSRobert Love WARN_ON(1); 64042e9a92fSRobert Love break; 64142e9a92fSRobert Love } 64242e9a92fSRobert Love } 64342e9a92fSRobert Love 64442e9a92fSRobert Love /** 64534f42a07SRobert Love * fc_rport_enter_ready() - Enter the ready state and start discovery 64642e9a92fSRobert Love * @lport: Fibre Channel local port that is ready 64742e9a92fSRobert Love * 64842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 64942e9a92fSRobert Love * this routine. 65042e9a92fSRobert Love */ 65142e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 65242e9a92fSRobert Love { 6537414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 6547414705eSRobert Love fc_lport_state(lport)); 65542e9a92fSRobert Love 65642e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 65742e9a92fSRobert Love 65829d898e9SJoe Eykholt if (!lport->ptp_rp) 65942e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 66042e9a92fSRobert Love } 66142e9a92fSRobert Love 66242e9a92fSRobert Love /** 66334f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 66442e9a92fSRobert Love * @sp_in: The sequence the FLOGI is on 66542e9a92fSRobert Love * @rx_fp: The frame the FLOGI is in 66642e9a92fSRobert Love * @lport: The lport that recieved the request 66742e9a92fSRobert Love * 66842e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 66942e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 67042e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 67142e9a92fSRobert Love * 6721b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 67342e9a92fSRobert Love * this function. 67442e9a92fSRobert Love */ 67542e9a92fSRobert Love static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, 67642e9a92fSRobert Love struct fc_frame *rx_fp, 67742e9a92fSRobert Love struct fc_lport *lport) 67842e9a92fSRobert Love { 67942e9a92fSRobert Love struct fc_frame *fp; 68042e9a92fSRobert Love struct fc_frame_header *fh; 68142e9a92fSRobert Love struct fc_seq *sp; 68242e9a92fSRobert Love struct fc_exch *ep; 68342e9a92fSRobert Love struct fc_els_flogi *flp; 68442e9a92fSRobert Love struct fc_els_flogi *new_flp; 68542e9a92fSRobert Love u64 remote_wwpn; 68642e9a92fSRobert Love u32 remote_fid; 68742e9a92fSRobert Love u32 local_fid; 68842e9a92fSRobert Love u32 f_ctl; 68942e9a92fSRobert Love 6907414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 69142e9a92fSRobert Love fc_lport_state(lport)); 69242e9a92fSRobert Love 69342e9a92fSRobert Love fh = fc_frame_header_get(rx_fp); 69442e9a92fSRobert Love remote_fid = ntoh24(fh->fh_s_id); 69542e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 69642e9a92fSRobert Love if (!flp) 69742e9a92fSRobert Love goto out; 69842e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 69942e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 7007414705eSRobert Love printk(KERN_WARNING "libfc: Received FLOGI from port " 7017414705eSRobert Love "with same WWPN %llx\n", remote_wwpn); 70242e9a92fSRobert Love goto out; 70342e9a92fSRobert Love } 7047414705eSRobert Love FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn); 70542e9a92fSRobert Love 70642e9a92fSRobert Love /* 70742e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 70842e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 70942e9a92fSRobert Love * But if so, both of us could end up with the same FID. 71042e9a92fSRobert Love */ 71142e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 71242e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 71342e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 71442e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 71542e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 71642e9a92fSRobert Love } else if (!remote_fid) { 71742e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 71842e9a92fSRobert Love } 71942e9a92fSRobert Love 72042e9a92fSRobert Love fc_host_port_id(lport->host) = local_fid; 72142e9a92fSRobert Love 72242e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 72342e9a92fSRobert Love if (fp) { 72442e9a92fSRobert Love sp = lport->tt.seq_start_next(fr_seq(rx_fp)); 72542e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 72642e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 72742e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 72842e9a92fSRobert Love 72942e9a92fSRobert Love /* 73042e9a92fSRobert Love * Send the response. If this fails, the originator should 73142e9a92fSRobert Love * repeat the sequence. 73242e9a92fSRobert Love */ 73342e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 73442e9a92fSRobert Love ep = fc_seq_exch(sp); 73542e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 73642e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 73742e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 73842e9a92fSRobert Love 73942e9a92fSRobert Love } else { 74042e9a92fSRobert Love fc_lport_error(lport, fp); 74142e9a92fSRobert Love } 74242e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 74342e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 74442e9a92fSRobert Love 74542e9a92fSRobert Love out: 74642e9a92fSRobert Love sp = fr_seq(rx_fp); 74742e9a92fSRobert Love fc_frame_free(rx_fp); 74842e9a92fSRobert Love } 74942e9a92fSRobert Love 75042e9a92fSRobert Love /** 75134f42a07SRobert Love * fc_lport_recv_req() - The generic lport request handler 75242e9a92fSRobert Love * @lport: The lport that received the request 75342e9a92fSRobert Love * @sp: The sequence the request is on 75442e9a92fSRobert Love * @fp: The frame the request is in 75542e9a92fSRobert Love * 75642e9a92fSRobert Love * This function will see if the lport handles the request or 75742e9a92fSRobert Love * if an rport should handle the request. 75842e9a92fSRobert Love * 75942e9a92fSRobert Love * Locking Note: This function should not be called with the lport 76042e9a92fSRobert Love * lock held becuase it will grab the lock. 76142e9a92fSRobert Love */ 76242e9a92fSRobert Love static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, 76342e9a92fSRobert Love struct fc_frame *fp) 76442e9a92fSRobert Love { 76542e9a92fSRobert Love struct fc_frame_header *fh = fc_frame_header_get(fp); 76642e9a92fSRobert Love void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); 76742e9a92fSRobert Love 76842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 76942e9a92fSRobert Love 77042e9a92fSRobert Love /* 77142e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 77242e9a92fSRobert Love * RSCN here. These don't require a session. 77342e9a92fSRobert Love * Even if we had a session, it might not be ready. 77442e9a92fSRobert Love */ 775e9ba8b42SJoe Eykholt if (!lport->link_up) 776e9ba8b42SJoe Eykholt fc_frame_free(fp); 777e9ba8b42SJoe Eykholt else if (fh->fh_type == FC_TYPE_ELS && 778e9ba8b42SJoe Eykholt fh->fh_r_ctl == FC_RCTL_ELS_REQ) { 77942e9a92fSRobert Love /* 78042e9a92fSRobert Love * Check opcode. 78142e9a92fSRobert Love */ 782131203a1SJoe Eykholt recv = lport->tt.rport_recv_req; 78342e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 78442e9a92fSRobert Love case ELS_FLOGI: 78542e9a92fSRobert Love recv = fc_lport_recv_flogi_req; 78642e9a92fSRobert Love break; 78742e9a92fSRobert Love case ELS_LOGO: 78842e9a92fSRobert Love fh = fc_frame_header_get(fp); 78942e9a92fSRobert Love if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) 79042e9a92fSRobert Love recv = fc_lport_recv_logo_req; 79142e9a92fSRobert Love break; 79242e9a92fSRobert Love case ELS_RSCN: 79342e9a92fSRobert Love recv = lport->tt.disc_recv_req; 79442e9a92fSRobert Love break; 79542e9a92fSRobert Love case ELS_ECHO: 79642e9a92fSRobert Love recv = fc_lport_recv_echo_req; 79742e9a92fSRobert Love break; 79842e9a92fSRobert Love case ELS_RLIR: 79942e9a92fSRobert Love recv = fc_lport_recv_rlir_req; 80042e9a92fSRobert Love break; 80142e9a92fSRobert Love case ELS_RNID: 80242e9a92fSRobert Love recv = fc_lport_recv_rnid_req; 80342e9a92fSRobert Love break; 80442e9a92fSRobert Love } 80542e9a92fSRobert Love 80642e9a92fSRobert Love recv(sp, fp, lport); 80742e9a92fSRobert Love } else { 8087414705eSRobert Love FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", 8097414705eSRobert Love fr_eof(fp)); 81042e9a92fSRobert Love fc_frame_free(fp); 81142e9a92fSRobert Love } 81242e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 81342e9a92fSRobert Love 81442e9a92fSRobert Love /* 81542e9a92fSRobert Love * The common exch_done for all request may not be good 81642e9a92fSRobert Love * if any request requires longer hold on exhange. XXX 81742e9a92fSRobert Love */ 81842e9a92fSRobert Love lport->tt.exch_done(sp); 81942e9a92fSRobert Love } 82042e9a92fSRobert Love 82142e9a92fSRobert Love /** 82234f42a07SRobert Love * fc_lport_reset() - Reset an lport 82342e9a92fSRobert Love * @lport: The lport which should be reset 82442e9a92fSRobert Love * 82542e9a92fSRobert Love * Locking Note: This functions should not be called with the 82642e9a92fSRobert Love * lport lock held. 82742e9a92fSRobert Love */ 82842e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 82942e9a92fSRobert Love { 830f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 83142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 83242e9a92fSRobert Love fc_lport_enter_reset(lport); 83342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 83442e9a92fSRobert Love return 0; 83542e9a92fSRobert Love } 83642e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 83742e9a92fSRobert Love 83842e9a92fSRobert Love /** 8391190d925SJoe Eykholt * fc_lport_reset_locked() - Reset the local port 84042e9a92fSRobert Love * @lport: Fibre Channel local port to be reset 84142e9a92fSRobert Love * 84242e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 84342e9a92fSRobert Love * this routine. 84442e9a92fSRobert Love */ 8451190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 84642e9a92fSRobert Love { 84742e9a92fSRobert Love if (lport->dns_rp) 84842e9a92fSRobert Love lport->tt.rport_logoff(lport->dns_rp); 84942e9a92fSRobert Love 85042e9a92fSRobert Love lport->ptp_rp = NULL; 85142e9a92fSRobert Love 85242e9a92fSRobert Love lport->tt.disc_stop(lport); 85342e9a92fSRobert Love 8541f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 85542e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 85642e9a92fSRobert Love fc_host_port_id(lport->host) = 0; 8571190d925SJoe Eykholt } 85842e9a92fSRobert Love 8591190d925SJoe Eykholt /** 8601190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 8611190d925SJoe Eykholt * @lport: Fibre Channel local port to be reset 8621190d925SJoe Eykholt * 8631190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 8641190d925SJoe Eykholt * this routine. 8651190d925SJoe Eykholt */ 8661190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 8671190d925SJoe Eykholt { 8681190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 8691190d925SJoe Eykholt fc_lport_state(lport)); 8701190d925SJoe Eykholt 8711190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 8721190d925SJoe Eykholt fc_lport_reset_locked(lport); 873bc0e17f6SVasu Dev if (lport->link_up) 87442e9a92fSRobert Love fc_lport_enter_flogi(lport); 87542e9a92fSRobert Love } 87642e9a92fSRobert Love 87742e9a92fSRobert Love /** 8781190d925SJoe Eykholt * fc_lport_enter_disabled() - disable the local port 8791190d925SJoe Eykholt * @lport: Fibre Channel local port to be reset 8801190d925SJoe Eykholt * 8811190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 8821190d925SJoe Eykholt * this routine. 8831190d925SJoe Eykholt */ 8841190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 8851190d925SJoe Eykholt { 8861190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 8871190d925SJoe Eykholt fc_lport_state(lport)); 8881190d925SJoe Eykholt 8891190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 8901190d925SJoe Eykholt fc_lport_reset_locked(lport); 8911190d925SJoe Eykholt } 8921190d925SJoe Eykholt 8931190d925SJoe Eykholt /** 89434f42a07SRobert Love * fc_lport_error() - Handler for any errors 89542e9a92fSRobert Love * @lport: The fc_lport object 89642e9a92fSRobert Love * @fp: The frame pointer 89742e9a92fSRobert Love * 89842e9a92fSRobert Love * If the error was caused by a resource allocation failure 89942e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 90042e9a92fSRobert Love * after the e_d_tov time. 90142e9a92fSRobert Love */ 90242e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 90342e9a92fSRobert Love { 90442e9a92fSRobert Love unsigned long delay = 0; 9057414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 90642e9a92fSRobert Love PTR_ERR(fp), fc_lport_state(lport), 90742e9a92fSRobert Love lport->retry_count); 90842e9a92fSRobert Love 90942e9a92fSRobert Love if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { 91042e9a92fSRobert Love /* 91142e9a92fSRobert Love * Memory allocation failure, or the exchange timed out. 91242e9a92fSRobert Love * Retry after delay 91342e9a92fSRobert Love */ 91442e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 91542e9a92fSRobert Love lport->retry_count++; 91642e9a92fSRobert Love if (!fp) 91742e9a92fSRobert Love delay = msecs_to_jiffies(500); 91842e9a92fSRobert Love else 91942e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 92042e9a92fSRobert Love 92142e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 92242e9a92fSRobert Love } else { 92342e9a92fSRobert Love switch (lport->state) { 924b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 92542e9a92fSRobert Love case LPORT_ST_READY: 92642e9a92fSRobert Love case LPORT_ST_RESET: 92742e9a92fSRobert Love case LPORT_ST_RPN_ID: 92842e9a92fSRobert Love case LPORT_ST_RFT_ID: 92942e9a92fSRobert Love case LPORT_ST_SCR: 93042e9a92fSRobert Love case LPORT_ST_DNS: 93142e9a92fSRobert Love case LPORT_ST_FLOGI: 93242e9a92fSRobert Love case LPORT_ST_LOGO: 93342e9a92fSRobert Love fc_lport_enter_reset(lport); 93442e9a92fSRobert Love break; 93542e9a92fSRobert Love } 93642e9a92fSRobert Love } 93742e9a92fSRobert Love } 93842e9a92fSRobert Love } 93942e9a92fSRobert Love 94042e9a92fSRobert Love /** 94134f42a07SRobert Love * fc_lport_rft_id_resp() - Handle response to Register Fibre 94242e9a92fSRobert Love * Channel Types by ID (RPN_ID) request 94342e9a92fSRobert Love * @sp: current sequence in RPN_ID exchange 94442e9a92fSRobert Love * @fp: response frame 94542e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 94642e9a92fSRobert Love * 94742e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 94842e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 94942e9a92fSRobert Love * and then unlock the lport. 95042e9a92fSRobert Love */ 95142e9a92fSRobert Love static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp, 95242e9a92fSRobert Love void *lp_arg) 95342e9a92fSRobert Love { 95442e9a92fSRobert Love struct fc_lport *lport = lp_arg; 95542e9a92fSRobert Love struct fc_frame_header *fh; 95642e9a92fSRobert Love struct fc_ct_hdr *ct; 95742e9a92fSRobert Love 958f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a RFT_ID %s\n", fc_els_resp_type(fp)); 959f657d299SJoe Eykholt 96042e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 96142e9a92fSRobert Love return; 96242e9a92fSRobert Love 96342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 96442e9a92fSRobert Love 96542e9a92fSRobert Love if (lport->state != LPORT_ST_RFT_ID) { 9667414705eSRobert Love FC_LPORT_DBG(lport, "Received a RFT_ID response, but in state " 9677414705eSRobert Love "%s\n", fc_lport_state(lport)); 96876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 96976f6804eSAbhijeet Joglekar goto err; 97042e9a92fSRobert Love goto out; 97142e9a92fSRobert Love } 97242e9a92fSRobert Love 97376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 97476f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 97576f6804eSAbhijeet Joglekar goto err; 97676f6804eSAbhijeet Joglekar } 97776f6804eSAbhijeet Joglekar 97842e9a92fSRobert Love fh = fc_frame_header_get(fp); 97942e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 98042e9a92fSRobert Love 98142e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 98242e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 98342e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 98442e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 98542e9a92fSRobert Love fc_lport_enter_scr(lport); 98642e9a92fSRobert Love else 98742e9a92fSRobert Love fc_lport_error(lport, fp); 98842e9a92fSRobert Love out: 98942e9a92fSRobert Love fc_frame_free(fp); 99042e9a92fSRobert Love err: 99142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 99242e9a92fSRobert Love } 99342e9a92fSRobert Love 99442e9a92fSRobert Love /** 99534f42a07SRobert Love * fc_lport_rpn_id_resp() - Handle response to Register Port 99642e9a92fSRobert Love * Name by ID (RPN_ID) request 99742e9a92fSRobert Love * @sp: current sequence in RPN_ID exchange 99842e9a92fSRobert Love * @fp: response frame 99942e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 100042e9a92fSRobert Love * 100142e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 100242e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 100342e9a92fSRobert Love * and then unlock the lport. 100442e9a92fSRobert Love */ 100542e9a92fSRobert Love static void fc_lport_rpn_id_resp(struct fc_seq *sp, struct fc_frame *fp, 100642e9a92fSRobert Love void *lp_arg) 100742e9a92fSRobert Love { 100842e9a92fSRobert Love struct fc_lport *lport = lp_arg; 100942e9a92fSRobert Love struct fc_frame_header *fh; 101042e9a92fSRobert Love struct fc_ct_hdr *ct; 101142e9a92fSRobert Love 1012f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a RPN_ID %s\n", fc_els_resp_type(fp)); 1013f657d299SJoe Eykholt 101442e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 101542e9a92fSRobert Love return; 101642e9a92fSRobert Love 101742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 101842e9a92fSRobert Love 101942e9a92fSRobert Love if (lport->state != LPORT_ST_RPN_ID) { 10207414705eSRobert Love FC_LPORT_DBG(lport, "Received a RPN_ID response, but in state " 10217414705eSRobert Love "%s\n", fc_lport_state(lport)); 102276f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 102376f6804eSAbhijeet Joglekar goto err; 102442e9a92fSRobert Love goto out; 102542e9a92fSRobert Love } 102642e9a92fSRobert Love 102776f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 102876f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 102976f6804eSAbhijeet Joglekar goto err; 103076f6804eSAbhijeet Joglekar } 103176f6804eSAbhijeet Joglekar 103242e9a92fSRobert Love fh = fc_frame_header_get(fp); 103342e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 103442e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 103542e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 103642e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 103742e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 103842e9a92fSRobert Love fc_lport_enter_rft_id(lport); 103942e9a92fSRobert Love else 104042e9a92fSRobert Love fc_lport_error(lport, fp); 104142e9a92fSRobert Love 104242e9a92fSRobert Love out: 104342e9a92fSRobert Love fc_frame_free(fp); 104442e9a92fSRobert Love err: 104542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 104642e9a92fSRobert Love } 104742e9a92fSRobert Love 104842e9a92fSRobert Love /** 104934f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 105042e9a92fSRobert Love * @sp: current sequence in SCR exchange 105142e9a92fSRobert Love * @fp: response frame 105242e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 105342e9a92fSRobert Love * 105442e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 105542e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 105642e9a92fSRobert Love * and then unlock the lport. 105742e9a92fSRobert Love */ 105842e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 105942e9a92fSRobert Love void *lp_arg) 106042e9a92fSRobert Love { 106142e9a92fSRobert Love struct fc_lport *lport = lp_arg; 106242e9a92fSRobert Love u8 op; 106342e9a92fSRobert Love 1064f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1065f657d299SJoe Eykholt 106642e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 106742e9a92fSRobert Love return; 106842e9a92fSRobert Love 106942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 107042e9a92fSRobert Love 107142e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 10727414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 10737414705eSRobert Love "%s\n", fc_lport_state(lport)); 107476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 107576f6804eSAbhijeet Joglekar goto err; 107642e9a92fSRobert Love goto out; 107742e9a92fSRobert Love } 107842e9a92fSRobert Love 107976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 108076f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 108176f6804eSAbhijeet Joglekar goto err; 108276f6804eSAbhijeet Joglekar } 108376f6804eSAbhijeet Joglekar 108442e9a92fSRobert Love op = fc_frame_payload_op(fp); 108542e9a92fSRobert Love if (op == ELS_LS_ACC) 108642e9a92fSRobert Love fc_lport_enter_ready(lport); 108742e9a92fSRobert Love else 108842e9a92fSRobert Love fc_lport_error(lport, fp); 108942e9a92fSRobert Love 109042e9a92fSRobert Love out: 109142e9a92fSRobert Love fc_frame_free(fp); 109242e9a92fSRobert Love err: 109342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 109442e9a92fSRobert Love } 109542e9a92fSRobert Love 109642e9a92fSRobert Love /** 109734f42a07SRobert Love * fc_lport_enter_scr() - Send a State Change Register (SCR) request 109842e9a92fSRobert Love * @lport: Fibre Channel local port to register for state changes 109942e9a92fSRobert Love * 110042e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 110142e9a92fSRobert Love * this routine. 110242e9a92fSRobert Love */ 110342e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 110442e9a92fSRobert Love { 110542e9a92fSRobert Love struct fc_frame *fp; 110642e9a92fSRobert Love 11077414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 11087414705eSRobert Love fc_lport_state(lport)); 110942e9a92fSRobert Love 111042e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 111142e9a92fSRobert Love 111242e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 111342e9a92fSRobert Love if (!fp) { 111442e9a92fSRobert Love fc_lport_error(lport, fp); 111542e9a92fSRobert Love return; 111642e9a92fSRobert Love } 111742e9a92fSRobert Love 1118a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 111942e9a92fSRobert Love fc_lport_scr_resp, lport, lport->e_d_tov)) 11208f550f93SChris Leech fc_lport_error(lport, NULL); 112142e9a92fSRobert Love } 112242e9a92fSRobert Love 112342e9a92fSRobert Love /** 112434f42a07SRobert Love * fc_lport_enter_rft_id() - Register FC4-types with the name server 112542e9a92fSRobert Love * @lport: Fibre Channel local port to register 112642e9a92fSRobert Love * 112742e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 112842e9a92fSRobert Love * this routine. 112942e9a92fSRobert Love */ 113042e9a92fSRobert Love static void fc_lport_enter_rft_id(struct fc_lport *lport) 113142e9a92fSRobert Love { 113242e9a92fSRobert Love struct fc_frame *fp; 113342e9a92fSRobert Love struct fc_ns_fts *lps; 113442e9a92fSRobert Love int i; 113542e9a92fSRobert Love 11367414705eSRobert Love FC_LPORT_DBG(lport, "Entered RFT_ID state from %s state\n", 11377414705eSRobert Love fc_lport_state(lport)); 113842e9a92fSRobert Love 113942e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_RFT_ID); 114042e9a92fSRobert Love 114142e9a92fSRobert Love lps = &lport->fcts; 114242e9a92fSRobert Love i = sizeof(lps->ff_type_map) / sizeof(lps->ff_type_map[0]); 114342e9a92fSRobert Love while (--i >= 0) 114442e9a92fSRobert Love if (ntohl(lps->ff_type_map[i]) != 0) 114542e9a92fSRobert Love break; 114642e9a92fSRobert Love if (i < 0) { 114742e9a92fSRobert Love /* nothing to register, move on to SCR */ 114842e9a92fSRobert Love fc_lport_enter_scr(lport); 114942e9a92fSRobert Love return; 115042e9a92fSRobert Love } 115142e9a92fSRobert Love 115242e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 115342e9a92fSRobert Love sizeof(struct fc_ns_rft)); 115442e9a92fSRobert Love if (!fp) { 115542e9a92fSRobert Love fc_lport_error(lport, fp); 115642e9a92fSRobert Love return; 115742e9a92fSRobert Love } 115842e9a92fSRobert Love 1159a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RFT_ID, 116042e9a92fSRobert Love fc_lport_rft_id_resp, 116142e9a92fSRobert Love lport, lport->e_d_tov)) 116242e9a92fSRobert Love fc_lport_error(lport, fp); 116342e9a92fSRobert Love } 116442e9a92fSRobert Love 116542e9a92fSRobert Love /** 116634f42a07SRobert Love * fc_rport_enter_rft_id() - Register port name with the name server 116742e9a92fSRobert Love * @lport: Fibre Channel local port to register 116842e9a92fSRobert Love * 116942e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 117042e9a92fSRobert Love * this routine. 117142e9a92fSRobert Love */ 117242e9a92fSRobert Love static void fc_lport_enter_rpn_id(struct fc_lport *lport) 117342e9a92fSRobert Love { 117442e9a92fSRobert Love struct fc_frame *fp; 117542e9a92fSRobert Love 11767414705eSRobert Love FC_LPORT_DBG(lport, "Entered RPN_ID state from %s state\n", 11777414705eSRobert Love fc_lport_state(lport)); 117842e9a92fSRobert Love 117942e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_RPN_ID); 118042e9a92fSRobert Love 118142e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 118242e9a92fSRobert Love sizeof(struct fc_ns_rn_id)); 118342e9a92fSRobert Love if (!fp) { 118442e9a92fSRobert Love fc_lport_error(lport, fp); 118542e9a92fSRobert Love return; 118642e9a92fSRobert Love } 118742e9a92fSRobert Love 1188a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RPN_ID, 118942e9a92fSRobert Love fc_lport_rpn_id_resp, 119042e9a92fSRobert Love lport, lport->e_d_tov)) 11918f550f93SChris Leech fc_lport_error(lport, NULL); 119242e9a92fSRobert Love } 119342e9a92fSRobert Love 119442e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 119542e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 119642e9a92fSRobert Love }; 119742e9a92fSRobert Love 119842e9a92fSRobert Love /** 119934f42a07SRobert Love * fc_rport_enter_dns() - Create a rport to the name server 120042e9a92fSRobert Love * @lport: Fibre Channel local port requesting a rport for the name server 120142e9a92fSRobert Love * 120242e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 120342e9a92fSRobert Love * this routine. 120442e9a92fSRobert Love */ 120542e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 120642e9a92fSRobert Love { 1207ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 120842e9a92fSRobert Love 12097414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 12107414705eSRobert Love fc_lport_state(lport)); 121142e9a92fSRobert Love 121242e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 121342e9a92fSRobert Love 121448f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 12159737e6a7SRobert Love rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); 121648f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 12179fb9d328SJoe Eykholt if (!rdata) 121842e9a92fSRobert Love goto err; 121942e9a92fSRobert Love 122042e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 12219fb9d328SJoe Eykholt lport->tt.rport_login(rdata); 122242e9a92fSRobert Love return; 122342e9a92fSRobert Love 122442e9a92fSRobert Love err: 122542e9a92fSRobert Love fc_lport_error(lport, NULL); 122642e9a92fSRobert Love } 122742e9a92fSRobert Love 122842e9a92fSRobert Love /** 122934f42a07SRobert Love * fc_lport_timeout() - Handler for the retry_work timer. 123042e9a92fSRobert Love * @work: The work struct of the fc_lport 123142e9a92fSRobert Love */ 123242e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 123342e9a92fSRobert Love { 123442e9a92fSRobert Love struct fc_lport *lport = 123542e9a92fSRobert Love container_of(work, struct fc_lport, 123642e9a92fSRobert Love retry_work.work); 123742e9a92fSRobert Love 123842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 123942e9a92fSRobert Love 124042e9a92fSRobert Love switch (lport->state) { 1241b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 124242e9a92fSRobert Love WARN_ON(1); 124342e9a92fSRobert Love break; 124422655ac2SJoe Eykholt case LPORT_ST_READY: 124522655ac2SJoe Eykholt WARN_ON(1); 124622655ac2SJoe Eykholt break; 124722655ac2SJoe Eykholt case LPORT_ST_RESET: 124822655ac2SJoe Eykholt break; 124942e9a92fSRobert Love case LPORT_ST_FLOGI: 125042e9a92fSRobert Love fc_lport_enter_flogi(lport); 125142e9a92fSRobert Love break; 125242e9a92fSRobert Love case LPORT_ST_DNS: 125342e9a92fSRobert Love fc_lport_enter_dns(lport); 125442e9a92fSRobert Love break; 125542e9a92fSRobert Love case LPORT_ST_RPN_ID: 125642e9a92fSRobert Love fc_lport_enter_rpn_id(lport); 125742e9a92fSRobert Love break; 125842e9a92fSRobert Love case LPORT_ST_RFT_ID: 125942e9a92fSRobert Love fc_lport_enter_rft_id(lport); 126042e9a92fSRobert Love break; 126142e9a92fSRobert Love case LPORT_ST_SCR: 126242e9a92fSRobert Love fc_lport_enter_scr(lport); 126342e9a92fSRobert Love break; 126442e9a92fSRobert Love case LPORT_ST_LOGO: 126542e9a92fSRobert Love fc_lport_enter_logo(lport); 126642e9a92fSRobert Love break; 126742e9a92fSRobert Love } 126842e9a92fSRobert Love 126942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 127042e9a92fSRobert Love } 127142e9a92fSRobert Love 127242e9a92fSRobert Love /** 127334f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 127442e9a92fSRobert Love * @sp: current sequence in LOGO exchange 127542e9a92fSRobert Love * @fp: response frame 127642e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the LOGO request 127742e9a92fSRobert Love * 127842e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 127942e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 128042e9a92fSRobert Love * and then unlock the lport. 128142e9a92fSRobert Love */ 128242e9a92fSRobert Love static void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 128342e9a92fSRobert Love void *lp_arg) 128442e9a92fSRobert Love { 128542e9a92fSRobert Love struct fc_lport *lport = lp_arg; 128642e9a92fSRobert Love u8 op; 128742e9a92fSRobert Love 1288f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1289f657d299SJoe Eykholt 129042e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 129142e9a92fSRobert Love return; 129242e9a92fSRobert Love 129342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 129442e9a92fSRobert Love 129542e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 12967414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 12977414705eSRobert Love "%s\n", fc_lport_state(lport)); 129876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 129976f6804eSAbhijeet Joglekar goto err; 130042e9a92fSRobert Love goto out; 130142e9a92fSRobert Love } 130242e9a92fSRobert Love 130376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 130476f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 130576f6804eSAbhijeet Joglekar goto err; 130676f6804eSAbhijeet Joglekar } 130776f6804eSAbhijeet Joglekar 130842e9a92fSRobert Love op = fc_frame_payload_op(fp); 130942e9a92fSRobert Love if (op == ELS_LS_ACC) 13101190d925SJoe Eykholt fc_lport_enter_disabled(lport); 131142e9a92fSRobert Love else 131242e9a92fSRobert Love fc_lport_error(lport, fp); 131342e9a92fSRobert Love 131442e9a92fSRobert Love out: 131542e9a92fSRobert Love fc_frame_free(fp); 131642e9a92fSRobert Love err: 131742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 131842e9a92fSRobert Love } 131942e9a92fSRobert Love 132042e9a92fSRobert Love /** 132134f42a07SRobert Love * fc_rport_enter_logo() - Logout of the fabric 132242e9a92fSRobert Love * @lport: Fibre Channel local port to be logged out 132342e9a92fSRobert Love * 132442e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 132542e9a92fSRobert Love * this routine. 132642e9a92fSRobert Love */ 132742e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 132842e9a92fSRobert Love { 132942e9a92fSRobert Love struct fc_frame *fp; 133042e9a92fSRobert Love struct fc_els_logo *logo; 133142e9a92fSRobert Love 13327414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 13337414705eSRobert Love fc_lport_state(lport)); 133442e9a92fSRobert Love 133542e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 133642e9a92fSRobert Love 133742e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 133842e9a92fSRobert Love if (!fp) { 133942e9a92fSRobert Love fc_lport_error(lport, fp); 134042e9a92fSRobert Love return; 134142e9a92fSRobert Love } 134242e9a92fSRobert Love 1343a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1344a46f327aSJoe Eykholt fc_lport_logo_resp, lport, lport->e_d_tov)) 13458f550f93SChris Leech fc_lport_error(lport, NULL); 134642e9a92fSRobert Love } 134742e9a92fSRobert Love 134842e9a92fSRobert Love /** 134934f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 135042e9a92fSRobert Love * @sp: current sequence in FLOGI exchange 135142e9a92fSRobert Love * @fp: response frame 135242e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the FLOGI request 135342e9a92fSRobert Love * 135442e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 135542e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 135642e9a92fSRobert Love * and then unlock the lport. 135742e9a92fSRobert Love */ 135842e9a92fSRobert Love static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 135942e9a92fSRobert Love void *lp_arg) 136042e9a92fSRobert Love { 136142e9a92fSRobert Love struct fc_lport *lport = lp_arg; 136242e9a92fSRobert Love struct fc_frame_header *fh; 136342e9a92fSRobert Love struct fc_els_flogi *flp; 136442e9a92fSRobert Love u32 did; 136542e9a92fSRobert Love u16 csp_flags; 136642e9a92fSRobert Love unsigned int r_a_tov; 136742e9a92fSRobert Love unsigned int e_d_tov; 136842e9a92fSRobert Love u16 mfs; 136942e9a92fSRobert Love 1370f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1371f657d299SJoe Eykholt 137242e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 137342e9a92fSRobert Love return; 137442e9a92fSRobert Love 137542e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 137642e9a92fSRobert Love 137742e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 13787414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 13797414705eSRobert Love "%s\n", fc_lport_state(lport)); 138076f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 138176f6804eSAbhijeet Joglekar goto err; 138242e9a92fSRobert Love goto out; 138342e9a92fSRobert Love } 138442e9a92fSRobert Love 138576f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 138676f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 138776f6804eSAbhijeet Joglekar goto err; 138876f6804eSAbhijeet Joglekar } 138976f6804eSAbhijeet Joglekar 139042e9a92fSRobert Love fh = fc_frame_header_get(fp); 139142e9a92fSRobert Love did = ntoh24(fh->fh_d_id); 139242e9a92fSRobert Love if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { 139342e9a92fSRobert Love 13947414705eSRobert Love printk(KERN_INFO "libfc: Assigned FID (%6x) in FLOGI response\n", 13957414705eSRobert Love did); 139642e9a92fSRobert Love fc_host_port_id(lport->host) = did; 139742e9a92fSRobert Love 139842e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 139942e9a92fSRobert Love if (flp) { 140042e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 140142e9a92fSRobert Love FC_SP_BB_DATA_MASK; 140242e9a92fSRobert Love if (mfs >= FC_SP_MIN_MAX_PAYLOAD && 140342e9a92fSRobert Love mfs < lport->mfs) 140442e9a92fSRobert Love lport->mfs = mfs; 140542e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 140642e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 140742e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 140842e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 140942e9a92fSRobert Love e_d_tov /= 1000000; 141042e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 141142e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 141242e9a92fSRobert Love lport->e_d_tov = e_d_tov; 141342e9a92fSRobert Love lport->r_a_tov = 2 * e_d_tov; 14147414705eSRobert Love printk(KERN_INFO "libfc: Port (%6x) entered " 14157414705eSRobert Love "point to point mode\n", did); 141642e9a92fSRobert Love fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), 141742e9a92fSRobert Love get_unaligned_be64( 141842e9a92fSRobert Love &flp->fl_wwpn), 141942e9a92fSRobert Love get_unaligned_be64( 142042e9a92fSRobert Love &flp->fl_wwnn)); 142142e9a92fSRobert Love } else { 142242e9a92fSRobert Love lport->e_d_tov = e_d_tov; 142342e9a92fSRobert Love lport->r_a_tov = r_a_tov; 142442e9a92fSRobert Love fc_host_fabric_name(lport->host) = 142542e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 142642e9a92fSRobert Love fc_lport_enter_dns(lport); 142742e9a92fSRobert Love } 142842e9a92fSRobert Love } 142942e9a92fSRobert Love } else { 14307414705eSRobert Love FC_LPORT_DBG(lport, "Bad FLOGI response\n"); 143142e9a92fSRobert Love } 143242e9a92fSRobert Love 143342e9a92fSRobert Love out: 143442e9a92fSRobert Love fc_frame_free(fp); 143542e9a92fSRobert Love err: 143642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 143742e9a92fSRobert Love } 143842e9a92fSRobert Love 143942e9a92fSRobert Love /** 144034f42a07SRobert Love * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager 144142e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 144242e9a92fSRobert Love * 144342e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 144442e9a92fSRobert Love * this routine. 144542e9a92fSRobert Love */ 144642e9a92fSRobert Love void fc_lport_enter_flogi(struct fc_lport *lport) 144742e9a92fSRobert Love { 144842e9a92fSRobert Love struct fc_frame *fp; 144942e9a92fSRobert Love 14507414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 14517414705eSRobert Love fc_lport_state(lport)); 145242e9a92fSRobert Love 145342e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 145442e9a92fSRobert Love 145542e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 145642e9a92fSRobert Love if (!fp) 145742e9a92fSRobert Love return fc_lport_error(lport, fp); 145842e9a92fSRobert Love 1459a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_FLOGI, 146042e9a92fSRobert Love fc_lport_flogi_resp, lport, lport->e_d_tov)) 14618f550f93SChris Leech fc_lport_error(lport, NULL); 146242e9a92fSRobert Love } 146342e9a92fSRobert Love 146442e9a92fSRobert Love /* Configure a fc_lport */ 146542e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 146642e9a92fSRobert Love { 146742e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 146842e9a92fSRobert Love mutex_init(&lport->lp_mutex); 146942e9a92fSRobert Love 1470b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 147142e9a92fSRobert Love 147242e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 147342e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 147442e9a92fSRobert Love 147542e9a92fSRobert Love return 0; 147642e9a92fSRobert Love } 147742e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 147842e9a92fSRobert Love 147942e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 148042e9a92fSRobert Love { 148142e9a92fSRobert Love if (!lport->tt.lport_recv) 148242e9a92fSRobert Love lport->tt.lport_recv = fc_lport_recv_req; 148342e9a92fSRobert Love 148442e9a92fSRobert Love if (!lport->tt.lport_reset) 148542e9a92fSRobert Love lport->tt.lport_reset = fc_lport_reset; 148642e9a92fSRobert Love 148742e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 148842e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 148942e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 149042e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 149142e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 149242e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 149342e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 149442e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 149542e9a92fSRobert Love 149642e9a92fSRobert Love /* This value is also unchanging */ 149742e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 149842e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 149942e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 150042e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 150142e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 150242e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 150342e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 150442e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 150542e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 150642e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 150742e9a92fSRobert Love 150896316099SVasu Dev INIT_LIST_HEAD(&lport->ema_list); 150942e9a92fSRobert Love return 0; 151042e9a92fSRobert Love } 151142e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1512