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> 97a51ab396SSteve Ma #include <linux/scatterlist.h> 9842e9a92fSRobert Love 998866a5d9SRobert Love #include "fc_libfc.h" 1008866a5d9SRobert Love 10142e9a92fSRobert Love /* Fabric IDs to use for point-to-point mode, chosen on whims. */ 10242e9a92fSRobert Love #define FC_LOCAL_PTP_FID_LO 0x010101 10342e9a92fSRobert Love #define FC_LOCAL_PTP_FID_HI 0x010102 10442e9a92fSRobert Love 10542e9a92fSRobert Love #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ 10642e9a92fSRobert Love 10742e9a92fSRobert Love static void fc_lport_error(struct fc_lport *, struct fc_frame *); 10842e9a92fSRobert Love 10942e9a92fSRobert Love static void fc_lport_enter_reset(struct fc_lport *); 11042e9a92fSRobert Love static void fc_lport_enter_flogi(struct fc_lport *); 11142e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *); 112c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); 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", 121c9c7bd7aSChris Leech [LPORT_ST_RNN_ID] = "RNN_ID", 1225baa17c3SChris Leech [LPORT_ST_RSNN_NN] = "RSNN_NN", 123c9866a54SChris Leech [LPORT_ST_RSPN_ID] = "RSPN_ID", 12442e9a92fSRobert Love [LPORT_ST_RFT_ID] = "RFT_ID", 12542e9a92fSRobert Love [LPORT_ST_SCR] = "SCR", 12642e9a92fSRobert Love [LPORT_ST_READY] = "Ready", 12742e9a92fSRobert Love [LPORT_ST_LOGO] = "LOGO", 12842e9a92fSRobert Love [LPORT_ST_RESET] = "reset", 12942e9a92fSRobert Love }; 13042e9a92fSRobert Love 131a51ab396SSteve Ma /** 132a51ab396SSteve Ma * struct fc_bsg_info - FC Passthrough managemet structure 133a51ab396SSteve Ma * @job: The passthrough job 134a51ab396SSteve Ma * @lport: The local port to pass through a command 135a51ab396SSteve Ma * @rsp_code: The expected response code 136a51ab396SSteve Ma * @sg: job->reply_payload.sg_list 137a51ab396SSteve Ma * @nents: job->reply_payload.sg_cnt 138a51ab396SSteve Ma * @offset: The offset into the response data 139a51ab396SSteve Ma */ 140a51ab396SSteve Ma struct fc_bsg_info { 141a51ab396SSteve Ma struct fc_bsg_job *job; 142a51ab396SSteve Ma struct fc_lport *lport; 143a51ab396SSteve Ma u16 rsp_code; 144a51ab396SSteve Ma struct scatterlist *sg; 145a51ab396SSteve Ma u32 nents; 146a51ab396SSteve Ma size_t offset; 147a51ab396SSteve Ma }; 148a51ab396SSteve Ma 14942e9a92fSRobert Love static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) 15042e9a92fSRobert Love { 15142e9a92fSRobert Love fc_frame_free(fp); 15242e9a92fSRobert Love return 0; 15342e9a92fSRobert Love } 15442e9a92fSRobert Love 15542e9a92fSRobert Love /** 15634f42a07SRobert Love * fc_lport_rport_callback() - Event handler for rport events 15742e9a92fSRobert Love * @lport: The lport which is receiving the event 1589fb9d328SJoe Eykholt * @rdata: private remote port data 15942e9a92fSRobert Love * @event: The event that occured 16042e9a92fSRobert Love * 16142e9a92fSRobert Love * Locking Note: The rport lock should not be held when calling 16242e9a92fSRobert Love * this function. 16342e9a92fSRobert Love */ 16442e9a92fSRobert Love static void fc_lport_rport_callback(struct fc_lport *lport, 1659fb9d328SJoe Eykholt struct fc_rport_priv *rdata, 16642e9a92fSRobert Love enum fc_rport_event event) 16742e9a92fSRobert Love { 1687414705eSRobert Love FC_LPORT_DBG(lport, "Received a %d event for port (%6x)\n", event, 169f211fa51SJoe Eykholt rdata->ids.port_id); 17042e9a92fSRobert Love 171b5cbf083SJoe Eykholt mutex_lock(&lport->lp_mutex); 17242e9a92fSRobert Love switch (event) { 1734c0f62b5SJoe Eykholt case RPORT_EV_READY: 17442e9a92fSRobert Love if (lport->state == LPORT_ST_DNS) { 1759fb9d328SJoe Eykholt lport->dns_rp = rdata; 176c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); 17742e9a92fSRobert Love } else { 1784c0f62b5SJoe Eykholt FC_LPORT_DBG(lport, "Received an READY event " 1797414705eSRobert Love "on port (%6x) for the directory " 18042e9a92fSRobert Love "server, but the lport is not " 18142e9a92fSRobert Love "in the DNS state, it's in the " 182f211fa51SJoe Eykholt "%d state", rdata->ids.port_id, 18342e9a92fSRobert Love lport->state); 1849fb9d328SJoe Eykholt lport->tt.rport_logoff(rdata); 18542e9a92fSRobert Love } 18642e9a92fSRobert Love break; 18742e9a92fSRobert Love case RPORT_EV_LOGO: 18842e9a92fSRobert Love case RPORT_EV_FAILED: 18942e9a92fSRobert Love case RPORT_EV_STOP: 19042e9a92fSRobert Love lport->dns_rp = NULL; 19142e9a92fSRobert Love break; 19242e9a92fSRobert Love case RPORT_EV_NONE: 19342e9a92fSRobert Love break; 19442e9a92fSRobert Love } 195b5cbf083SJoe Eykholt mutex_unlock(&lport->lp_mutex); 19642e9a92fSRobert Love } 19742e9a92fSRobert Love 19842e9a92fSRobert Love /** 19934f42a07SRobert Love * fc_lport_state() - Return a string which represents the lport's state 20042e9a92fSRobert Love * @lport: The lport whose state is to converted to a string 20142e9a92fSRobert Love */ 20242e9a92fSRobert Love static const char *fc_lport_state(struct fc_lport *lport) 20342e9a92fSRobert Love { 20442e9a92fSRobert Love const char *cp; 20542e9a92fSRobert Love 20642e9a92fSRobert Love cp = fc_lport_state_names[lport->state]; 20742e9a92fSRobert Love if (!cp) 20842e9a92fSRobert Love cp = "unknown"; 20942e9a92fSRobert Love return cp; 21042e9a92fSRobert Love } 21142e9a92fSRobert Love 21242e9a92fSRobert Love /** 21334f42a07SRobert Love * fc_lport_ptp_setup() - Create an rport for point-to-point mode 21442e9a92fSRobert Love * @lport: The lport to attach the ptp rport to 21542e9a92fSRobert Love * @fid: The FID of the ptp rport 21642e9a92fSRobert Love * @remote_wwpn: The WWPN of the ptp rport 21742e9a92fSRobert Love * @remote_wwnn: The WWNN of the ptp rport 21842e9a92fSRobert Love */ 21942e9a92fSRobert Love static void fc_lport_ptp_setup(struct fc_lport *lport, 22042e9a92fSRobert Love u32 remote_fid, u64 remote_wwpn, 22142e9a92fSRobert Love u64 remote_wwnn) 22242e9a92fSRobert Love { 22348f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 22448f00902SJoe Eykholt if (lport->ptp_rp) 22542e9a92fSRobert Love lport->tt.rport_logoff(lport->ptp_rp); 2269737e6a7SRobert Love lport->ptp_rp = lport->tt.rport_create(lport, remote_fid); 2279737e6a7SRobert Love lport->ptp_rp->ids.port_name = remote_wwpn; 2289737e6a7SRobert Love lport->ptp_rp->ids.node_name = remote_wwnn; 22948f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 23042e9a92fSRobert Love 23142e9a92fSRobert Love lport->tt.rport_login(lport->ptp_rp); 23242e9a92fSRobert Love 23342e9a92fSRobert Love fc_lport_enter_ready(lport); 23442e9a92fSRobert Love } 23542e9a92fSRobert Love 23642e9a92fSRobert Love void fc_get_host_port_type(struct Scsi_Host *shost) 23742e9a92fSRobert Love { 23842e9a92fSRobert Love /* TODO - currently just NPORT */ 23942e9a92fSRobert Love fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 24042e9a92fSRobert Love } 24142e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_type); 24242e9a92fSRobert Love 24342e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost) 24442e9a92fSRobert Love { 24542e9a92fSRobert Love struct fc_lport *lp = shost_priv(shost); 24642e9a92fSRobert Love 2478faecddbSChris Leech mutex_lock(&lp->lp_mutex); 2488faecddbSChris Leech if (!lp->link_up) 2498faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 25042e9a92fSRobert Love else 2518faecddbSChris Leech switch (lp->state) { 2528faecddbSChris Leech case LPORT_ST_READY: 2538faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 2548faecddbSChris Leech break; 2558faecddbSChris Leech default: 25642e9a92fSRobert Love fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 25742e9a92fSRobert Love } 2588faecddbSChris Leech mutex_unlock(&lp->lp_mutex); 2598faecddbSChris Leech } 26042e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_state); 26142e9a92fSRobert Love 26242e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost) 26342e9a92fSRobert Love { 26442e9a92fSRobert Love struct fc_lport *lport = shost_priv(shost); 26542e9a92fSRobert Love 26642e9a92fSRobert Love fc_host_speed(shost) = lport->link_speed; 26742e9a92fSRobert Love } 26842e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_speed); 26942e9a92fSRobert Love 27042e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) 27142e9a92fSRobert Love { 27242e9a92fSRobert Love struct fc_host_statistics *fcoe_stats; 27342e9a92fSRobert Love struct fc_lport *lp = shost_priv(shost); 27442e9a92fSRobert Love struct timespec v0, v1; 275582b45bcSRobert Love unsigned int cpu; 27642e9a92fSRobert Love 27742e9a92fSRobert Love fcoe_stats = &lp->host_stats; 27842e9a92fSRobert Love memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); 27942e9a92fSRobert Love 28042e9a92fSRobert Love jiffies_to_timespec(jiffies, &v0); 28142e9a92fSRobert Love jiffies_to_timespec(lp->boot_time, &v1); 28242e9a92fSRobert Love fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); 28342e9a92fSRobert Love 284582b45bcSRobert Love for_each_possible_cpu(cpu) { 285582b45bcSRobert Love struct fcoe_dev_stats *stats; 286582b45bcSRobert Love 287582b45bcSRobert Love stats = per_cpu_ptr(lp->dev_stats, cpu); 288582b45bcSRobert Love 28942e9a92fSRobert Love fcoe_stats->tx_frames += stats->TxFrames; 29042e9a92fSRobert Love fcoe_stats->tx_words += stats->TxWords; 29142e9a92fSRobert Love fcoe_stats->rx_frames += stats->RxFrames; 29242e9a92fSRobert Love fcoe_stats->rx_words += stats->RxWords; 29342e9a92fSRobert Love fcoe_stats->error_frames += stats->ErrorFrames; 29442e9a92fSRobert Love fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; 29542e9a92fSRobert Love fcoe_stats->fcp_input_requests += stats->InputRequests; 29642e9a92fSRobert Love fcoe_stats->fcp_output_requests += stats->OutputRequests; 29742e9a92fSRobert Love fcoe_stats->fcp_control_requests += stats->ControlRequests; 29842e9a92fSRobert Love fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; 29942e9a92fSRobert Love fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; 30042e9a92fSRobert Love fcoe_stats->link_failure_count += stats->LinkFailureCount; 30142e9a92fSRobert Love } 30242e9a92fSRobert Love fcoe_stats->lip_count = -1; 30342e9a92fSRobert Love fcoe_stats->nos_count = -1; 30442e9a92fSRobert Love fcoe_stats->loss_of_sync_count = -1; 30542e9a92fSRobert Love fcoe_stats->loss_of_signal_count = -1; 30642e9a92fSRobert Love fcoe_stats->prim_seq_protocol_err_count = -1; 30742e9a92fSRobert Love fcoe_stats->dumped_frames = -1; 30842e9a92fSRobert Love return fcoe_stats; 30942e9a92fSRobert Love } 31042e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_stats); 31142e9a92fSRobert Love 31242e9a92fSRobert Love /* 31342e9a92fSRobert Love * Fill in FLOGI command for request. 31442e9a92fSRobert Love */ 31542e9a92fSRobert Love static void 31642e9a92fSRobert Love fc_lport_flogi_fill(struct fc_lport *lport, struct fc_els_flogi *flogi, 31742e9a92fSRobert Love unsigned int op) 31842e9a92fSRobert Love { 31942e9a92fSRobert Love struct fc_els_csp *sp; 32042e9a92fSRobert Love struct fc_els_cssp *cp; 32142e9a92fSRobert Love 32242e9a92fSRobert Love memset(flogi, 0, sizeof(*flogi)); 32342e9a92fSRobert Love flogi->fl_cmd = (u8) op; 32442e9a92fSRobert Love put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); 32542e9a92fSRobert Love put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); 32642e9a92fSRobert Love sp = &flogi->fl_csp; 32742e9a92fSRobert Love sp->sp_hi_ver = 0x20; 32842e9a92fSRobert Love sp->sp_lo_ver = 0x20; 32942e9a92fSRobert Love sp->sp_bb_cred = htons(10); /* this gets set by gateway */ 33042e9a92fSRobert Love sp->sp_bb_data = htons((u16) lport->mfs); 33142e9a92fSRobert Love cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ 33242e9a92fSRobert Love cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); 33342e9a92fSRobert Love if (op != ELS_FLOGI) { 33442e9a92fSRobert Love sp->sp_features = htons(FC_SP_FT_CIRO); 33542e9a92fSRobert Love sp->sp_tot_seq = htons(255); /* seq. we accept */ 33642e9a92fSRobert Love sp->sp_rel_off = htons(0x1f); 33742e9a92fSRobert Love sp->sp_e_d_tov = htonl(lport->e_d_tov); 33842e9a92fSRobert Love 33942e9a92fSRobert Love cp->cp_rdfs = htons((u16) lport->mfs); 34042e9a92fSRobert Love cp->cp_con_seq = htons(255); 34142e9a92fSRobert Love cp->cp_open_seq = 1; 34242e9a92fSRobert Love } 34342e9a92fSRobert Love } 34442e9a92fSRobert Love 34542e9a92fSRobert Love /* 34642e9a92fSRobert Love * Add a supported FC-4 type. 34742e9a92fSRobert Love */ 34842e9a92fSRobert Love static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) 34942e9a92fSRobert Love { 35042e9a92fSRobert Love __be32 *mp; 35142e9a92fSRobert Love 35242e9a92fSRobert Love mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; 35342e9a92fSRobert Love *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); 35442e9a92fSRobert Love } 35542e9a92fSRobert Love 35642e9a92fSRobert Love /** 35734f42a07SRobert Love * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. 35842e9a92fSRobert Love * @lport: Fibre Channel local port recieving the RLIR 35942e9a92fSRobert Love * @sp: current sequence in the RLIR exchange 36042e9a92fSRobert Love * @fp: RLIR request frame 36142e9a92fSRobert Love * 3621b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 36342e9a92fSRobert Love * this function. 36442e9a92fSRobert Love */ 36542e9a92fSRobert Love static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, 36642e9a92fSRobert Love struct fc_lport *lport) 36742e9a92fSRobert Love { 3687414705eSRobert Love FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", 36942e9a92fSRobert Love fc_lport_state(lport)); 37042e9a92fSRobert Love 37142e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 37242e9a92fSRobert Love fc_frame_free(fp); 37342e9a92fSRobert Love } 37442e9a92fSRobert Love 37542e9a92fSRobert Love /** 37634f42a07SRobert Love * fc_lport_recv_echo_req() - Handle received ECHO request 37742e9a92fSRobert Love * @lport: Fibre Channel local port recieving the ECHO 37842e9a92fSRobert Love * @sp: current sequence in the ECHO exchange 37942e9a92fSRobert Love * @fp: ECHO request frame 38042e9a92fSRobert Love * 3811b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 38242e9a92fSRobert Love * this function. 38342e9a92fSRobert Love */ 38442e9a92fSRobert Love static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp, 38542e9a92fSRobert Love struct fc_lport *lport) 38642e9a92fSRobert Love { 38742e9a92fSRobert Love struct fc_frame *fp; 38842e9a92fSRobert Love struct fc_exch *ep = fc_seq_exch(sp); 38942e9a92fSRobert Love unsigned int len; 39042e9a92fSRobert Love void *pp; 39142e9a92fSRobert Love void *dp; 39242e9a92fSRobert Love u32 f_ctl; 39342e9a92fSRobert Love 3941b69bc06SJoe Eykholt FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", 39542e9a92fSRobert Love fc_lport_state(lport)); 39642e9a92fSRobert Love 39742e9a92fSRobert Love len = fr_len(in_fp) - sizeof(struct fc_frame_header); 39842e9a92fSRobert Love pp = fc_frame_payload_get(in_fp, len); 39942e9a92fSRobert Love 40042e9a92fSRobert Love if (len < sizeof(__be32)) 40142e9a92fSRobert Love len = sizeof(__be32); 40242e9a92fSRobert Love 40342e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 40442e9a92fSRobert Love if (fp) { 40542e9a92fSRobert Love dp = fc_frame_payload_get(fp, len); 40642e9a92fSRobert Love memcpy(dp, pp, len); 4071b69bc06SJoe Eykholt *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); 40842e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 40942e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 41042e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 41142e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 41242e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 41342e9a92fSRobert Love } 41442e9a92fSRobert Love fc_frame_free(in_fp); 41542e9a92fSRobert Love } 41642e9a92fSRobert Love 41742e9a92fSRobert Love /** 4181b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 4191b69bc06SJoe Eykholt * @sp: The sequence in the RNID exchange 4201b69bc06SJoe Eykholt * @fp: The RNID request frame 4211b69bc06SJoe Eykholt * @lport: The local port recieving the RNID 42242e9a92fSRobert Love * 4231b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 42442e9a92fSRobert Love * this function. 42542e9a92fSRobert Love */ 42642e9a92fSRobert Love static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, 42742e9a92fSRobert Love struct fc_lport *lport) 42842e9a92fSRobert Love { 42942e9a92fSRobert Love struct fc_frame *fp; 43042e9a92fSRobert Love struct fc_exch *ep = fc_seq_exch(sp); 43142e9a92fSRobert Love struct fc_els_rnid *req; 43242e9a92fSRobert Love struct { 43342e9a92fSRobert Love struct fc_els_rnid_resp rnid; 43442e9a92fSRobert Love struct fc_els_rnid_cid cid; 43542e9a92fSRobert Love struct fc_els_rnid_gen gen; 43642e9a92fSRobert Love } *rp; 43742e9a92fSRobert Love struct fc_seq_els_data rjt_data; 43842e9a92fSRobert Love u8 fmt; 43942e9a92fSRobert Love size_t len; 44042e9a92fSRobert Love u32 f_ctl; 44142e9a92fSRobert Love 4427414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 44342e9a92fSRobert Love fc_lport_state(lport)); 44442e9a92fSRobert Love 44542e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 44642e9a92fSRobert Love if (!req) { 44742e9a92fSRobert Love rjt_data.fp = NULL; 44842e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 44942e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 45042e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); 45142e9a92fSRobert Love } else { 45242e9a92fSRobert Love fmt = req->rnid_fmt; 45342e9a92fSRobert Love len = sizeof(*rp); 45442e9a92fSRobert Love if (fmt != ELS_RNIDF_GEN || 45542e9a92fSRobert Love ntohl(lport->rnid_gen.rnid_atype) == 0) { 45642e9a92fSRobert Love fmt = ELS_RNIDF_NONE; /* nothing to provide */ 45742e9a92fSRobert Love len -= sizeof(rp->gen); 45842e9a92fSRobert Love } 45942e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 46042e9a92fSRobert Love if (fp) { 46142e9a92fSRobert Love rp = fc_frame_payload_get(fp, len); 46242e9a92fSRobert Love memset(rp, 0, len); 46342e9a92fSRobert Love rp->rnid.rnid_cmd = ELS_LS_ACC; 46442e9a92fSRobert Love rp->rnid.rnid_fmt = fmt; 46542e9a92fSRobert Love rp->rnid.rnid_cid_len = sizeof(rp->cid); 46642e9a92fSRobert Love rp->cid.rnid_wwpn = htonll(lport->wwpn); 46742e9a92fSRobert Love rp->cid.rnid_wwnn = htonll(lport->wwnn); 46842e9a92fSRobert Love if (fmt == ELS_RNIDF_GEN) { 46942e9a92fSRobert Love rp->rnid.rnid_sid_len = sizeof(rp->gen); 47042e9a92fSRobert Love memcpy(&rp->gen, &lport->rnid_gen, 47142e9a92fSRobert Love sizeof(rp->gen)); 47242e9a92fSRobert Love } 47342e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 47442e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; 47542e9a92fSRobert Love f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; 47642e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 47742e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 47842e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 47942e9a92fSRobert Love } 48042e9a92fSRobert Love } 48142e9a92fSRobert Love fc_frame_free(in_fp); 48242e9a92fSRobert Love } 48342e9a92fSRobert Love 48442e9a92fSRobert Love /** 48534f42a07SRobert Love * fc_lport_recv_logo_req() - Handle received fabric LOGO request 48642e9a92fSRobert Love * @lport: Fibre Channel local port recieving the LOGO 48742e9a92fSRobert Love * @sp: current sequence in the LOGO exchange 48842e9a92fSRobert Love * @fp: LOGO request frame 48942e9a92fSRobert Love * 49042e9a92fSRobert Love * Locking Note: The lport lock is exected to be held before calling 49142e9a92fSRobert Love * this function. 49242e9a92fSRobert Love */ 49342e9a92fSRobert Love static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, 49442e9a92fSRobert Love struct fc_lport *lport) 49542e9a92fSRobert Love { 49642e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 49742e9a92fSRobert Love fc_lport_enter_reset(lport); 49842e9a92fSRobert Love fc_frame_free(fp); 49942e9a92fSRobert Love } 50042e9a92fSRobert Love 50142e9a92fSRobert Love /** 50234f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 50342e9a92fSRobert Love * @lport: The lport that should log into the fabric 50442e9a92fSRobert Love * 50542e9a92fSRobert Love * Locking Note: This function should not be called 50642e9a92fSRobert Love * with the lport lock held. 50742e9a92fSRobert Love */ 50842e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 50942e9a92fSRobert Love { 51042e9a92fSRobert Love int rc = -1; 51142e9a92fSRobert Love 51242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 513b1d9fd55SJoe Eykholt if (lport->state == LPORT_ST_DISABLED) { 51442e9a92fSRobert Love fc_lport_enter_reset(lport); 51542e9a92fSRobert Love rc = 0; 51642e9a92fSRobert Love } 51742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 51842e9a92fSRobert Love 51942e9a92fSRobert Love return rc; 52042e9a92fSRobert Love } 52142e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 52242e9a92fSRobert Love 52342e9a92fSRobert Love /** 5248faecddbSChris Leech * __fc_linkup() - Handler for transport linkup events 5258faecddbSChris Leech * @lport: The lport whose link is up 5268faecddbSChris Leech * 5278faecddbSChris Leech * Locking: must be called with the lp_mutex held 5288faecddbSChris Leech */ 5298faecddbSChris Leech void __fc_linkup(struct fc_lport *lport) 5308faecddbSChris Leech { 5318faecddbSChris Leech if (!lport->link_up) { 5328faecddbSChris Leech lport->link_up = 1; 5338faecddbSChris Leech 5348faecddbSChris Leech if (lport->state == LPORT_ST_RESET) 5358faecddbSChris Leech fc_lport_enter_flogi(lport); 5368faecddbSChris Leech } 5378faecddbSChris Leech } 5388faecddbSChris Leech 5398faecddbSChris Leech /** 54034f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 54142e9a92fSRobert Love * @lport: The lport whose link is up 54242e9a92fSRobert Love */ 54342e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 54442e9a92fSRobert Love { 5457414705eSRobert Love printk(KERN_INFO "libfc: Link up on port (%6x)\n", 54642e9a92fSRobert Love fc_host_port_id(lport->host)); 54742e9a92fSRobert Love 54842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5498faecddbSChris Leech __fc_linkup(lport); 55042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 55142e9a92fSRobert Love } 55242e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 55342e9a92fSRobert Love 55442e9a92fSRobert Love /** 5558faecddbSChris Leech * __fc_linkdown() - Handler for transport linkdown events 5568faecddbSChris Leech * @lport: The lport whose link is down 5578faecddbSChris Leech * 5588faecddbSChris Leech * Locking: must be called with the lp_mutex held 5598faecddbSChris Leech */ 5608faecddbSChris Leech void __fc_linkdown(struct fc_lport *lport) 5618faecddbSChris Leech { 5628faecddbSChris Leech if (lport->link_up) { 5638faecddbSChris Leech lport->link_up = 0; 5648faecddbSChris Leech fc_lport_enter_reset(lport); 5658faecddbSChris Leech lport->tt.fcp_cleanup(lport); 5668faecddbSChris Leech } 5678faecddbSChris Leech } 5688faecddbSChris Leech 5698faecddbSChris Leech /** 57034f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 57142e9a92fSRobert Love * @lport: The lport whose link is down 57242e9a92fSRobert Love */ 57342e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 57442e9a92fSRobert Love { 5757414705eSRobert Love printk(KERN_INFO "libfc: Link down on port (%6x)\n", 57642e9a92fSRobert Love fc_host_port_id(lport->host)); 57742e9a92fSRobert Love 5788faecddbSChris Leech mutex_lock(&lport->lp_mutex); 5798faecddbSChris Leech __fc_linkdown(lport); 58042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 58142e9a92fSRobert Love } 58242e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 58342e9a92fSRobert Love 58442e9a92fSRobert Love /** 58534f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 58642e9a92fSRobert Love * @lport: fc_lport pointer to logoff the fabric 58742e9a92fSRobert Love * 58842e9a92fSRobert Love * Return value: 58942e9a92fSRobert Love * 0 for success, -1 for failure 59034f42a07SRobert Love */ 59142e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 59242e9a92fSRobert Love { 59342e9a92fSRobert Love lport->tt.disc_stop_final(lport); 59442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 595a0fd2e49SAbhijeet Joglekar if (lport->dns_rp) 596a0fd2e49SAbhijeet Joglekar lport->tt.rport_logoff(lport->dns_rp); 597a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 598a0fd2e49SAbhijeet Joglekar lport->tt.rport_flush_queue(); 599a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 60042e9a92fSRobert Love fc_lport_enter_logo(lport); 60142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 602f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 60342e9a92fSRobert Love return 0; 60442e9a92fSRobert Love } 60542e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 60642e9a92fSRobert Love 60742e9a92fSRobert Love /** 60834f42a07SRobert Love * fc_lport_destroy() - unregister a fc_lport 60942e9a92fSRobert Love * @lport: fc_lport pointer to unregister 61042e9a92fSRobert Love * 61142e9a92fSRobert Love * Return value: 61242e9a92fSRobert Love * None 61342e9a92fSRobert Love * Note: 61442e9a92fSRobert Love * exit routine for fc_lport instance 61542e9a92fSRobert Love * clean-up all the allocated memory 61642e9a92fSRobert Love * and free up other system resources. 61742e9a92fSRobert Love * 61834f42a07SRobert Love */ 61942e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 62042e9a92fSRobert Love { 621bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 622b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 623bbf15669SAbhijeet Joglekar lport->link_up = 0; 62442e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 625bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 626bbf15669SAbhijeet Joglekar 62742e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 628e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 6291f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 63042e9a92fSRobert Love return 0; 63142e9a92fSRobert Love } 63242e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 63342e9a92fSRobert Love 63442e9a92fSRobert Love /** 63534f42a07SRobert Love * fc_set_mfs() - sets up the mfs for the corresponding fc_lport 63642e9a92fSRobert Love * @lport: fc_lport pointer to unregister 63742e9a92fSRobert Love * @mfs: the new mfs for fc_lport 63842e9a92fSRobert Love * 63942e9a92fSRobert Love * Set mfs for the given fc_lport to the new mfs. 64042e9a92fSRobert Love * 64142e9a92fSRobert Love * Return: 0 for success 64234f42a07SRobert Love */ 64342e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 64442e9a92fSRobert Love { 64542e9a92fSRobert Love unsigned int old_mfs; 64642e9a92fSRobert Love int rc = -EINVAL; 64742e9a92fSRobert Love 64842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 64942e9a92fSRobert Love 65042e9a92fSRobert Love old_mfs = lport->mfs; 65142e9a92fSRobert Love 65242e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 65342e9a92fSRobert Love mfs &= ~3; 65442e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 65542e9a92fSRobert Love mfs = FC_MAX_FRAME; 65642e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 65742e9a92fSRobert Love lport->mfs = mfs; 65842e9a92fSRobert Love rc = 0; 65942e9a92fSRobert Love } 66042e9a92fSRobert Love 66142e9a92fSRobert Love if (!rc && mfs < old_mfs) 66242e9a92fSRobert Love fc_lport_enter_reset(lport); 66342e9a92fSRobert Love 66442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 66542e9a92fSRobert Love 66642e9a92fSRobert Love return rc; 66742e9a92fSRobert Love } 66842e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 66942e9a92fSRobert Love 67042e9a92fSRobert Love /** 67134f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 67242e9a92fSRobert Love * @lport: FC local port 67342e9a92fSRobert Love * @event: The discovery event 67442e9a92fSRobert Love */ 67542e9a92fSRobert Love void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) 67642e9a92fSRobert Love { 67742e9a92fSRobert Love switch (event) { 67842e9a92fSRobert Love case DISC_EV_SUCCESS: 6797414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 68042e9a92fSRobert Love break; 68142e9a92fSRobert Love case DISC_EV_FAILED: 6827414705eSRobert Love printk(KERN_ERR "libfc: Discovery failed for port (%6x)\n", 68342e9a92fSRobert Love fc_host_port_id(lport->host)); 68442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 68542e9a92fSRobert Love fc_lport_enter_reset(lport); 68642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 68742e9a92fSRobert Love break; 68842e9a92fSRobert Love case DISC_EV_NONE: 68942e9a92fSRobert Love WARN_ON(1); 69042e9a92fSRobert Love break; 69142e9a92fSRobert Love } 69242e9a92fSRobert Love } 69342e9a92fSRobert Love 69442e9a92fSRobert Love /** 69534f42a07SRobert Love * fc_rport_enter_ready() - Enter the ready state and start discovery 69642e9a92fSRobert Love * @lport: Fibre Channel local port that is ready 69742e9a92fSRobert Love * 69842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 69942e9a92fSRobert Love * this routine. 70042e9a92fSRobert Love */ 70142e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 70242e9a92fSRobert Love { 7037414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 7047414705eSRobert Love fc_lport_state(lport)); 70542e9a92fSRobert Love 70642e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 7078faecddbSChris Leech if (lport->vport) 7088faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); 7098faecddbSChris Leech fc_vports_linkchange(lport); 71042e9a92fSRobert Love 71129d898e9SJoe Eykholt if (!lport->ptp_rp) 71242e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 71342e9a92fSRobert Love } 71442e9a92fSRobert Love 71542e9a92fSRobert Love /** 71634f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 71742e9a92fSRobert Love * @sp_in: The sequence the FLOGI is on 71842e9a92fSRobert Love * @rx_fp: The frame the FLOGI is in 71942e9a92fSRobert Love * @lport: The lport that recieved the request 72042e9a92fSRobert Love * 72142e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 72242e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 72342e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 72442e9a92fSRobert Love * 7251b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 72642e9a92fSRobert Love * this function. 72742e9a92fSRobert Love */ 72842e9a92fSRobert Love static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, 72942e9a92fSRobert Love struct fc_frame *rx_fp, 73042e9a92fSRobert Love struct fc_lport *lport) 73142e9a92fSRobert Love { 73242e9a92fSRobert Love struct fc_frame *fp; 73342e9a92fSRobert Love struct fc_frame_header *fh; 73442e9a92fSRobert Love struct fc_seq *sp; 73542e9a92fSRobert Love struct fc_exch *ep; 73642e9a92fSRobert Love struct fc_els_flogi *flp; 73742e9a92fSRobert Love struct fc_els_flogi *new_flp; 73842e9a92fSRobert Love u64 remote_wwpn; 73942e9a92fSRobert Love u32 remote_fid; 74042e9a92fSRobert Love u32 local_fid; 74142e9a92fSRobert Love u32 f_ctl; 74242e9a92fSRobert Love 7437414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 74442e9a92fSRobert Love fc_lport_state(lport)); 74542e9a92fSRobert Love 74642e9a92fSRobert Love fh = fc_frame_header_get(rx_fp); 74742e9a92fSRobert Love remote_fid = ntoh24(fh->fh_s_id); 74842e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 74942e9a92fSRobert Love if (!flp) 75042e9a92fSRobert Love goto out; 75142e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 75242e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 7537414705eSRobert Love printk(KERN_WARNING "libfc: Received FLOGI from port " 7547414705eSRobert Love "with same WWPN %llx\n", remote_wwpn); 75542e9a92fSRobert Love goto out; 75642e9a92fSRobert Love } 7577414705eSRobert Love FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn); 75842e9a92fSRobert Love 75942e9a92fSRobert Love /* 76042e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 76142e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 76242e9a92fSRobert Love * But if so, both of us could end up with the same FID. 76342e9a92fSRobert Love */ 76442e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 76542e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 76642e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 76742e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 76842e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 76942e9a92fSRobert Love } else if (!remote_fid) { 77042e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 77142e9a92fSRobert Love } 77242e9a92fSRobert Love 77342e9a92fSRobert Love fc_host_port_id(lport->host) = local_fid; 77442e9a92fSRobert Love 77542e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 77642e9a92fSRobert Love if (fp) { 77742e9a92fSRobert Love sp = lport->tt.seq_start_next(fr_seq(rx_fp)); 77842e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 77942e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 78042e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 78142e9a92fSRobert Love 78242e9a92fSRobert Love /* 78342e9a92fSRobert Love * Send the response. If this fails, the originator should 78442e9a92fSRobert Love * repeat the sequence. 78542e9a92fSRobert Love */ 78642e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 78742e9a92fSRobert Love ep = fc_seq_exch(sp); 78842e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 78942e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 79042e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 79142e9a92fSRobert Love 79242e9a92fSRobert Love } else { 79342e9a92fSRobert Love fc_lport_error(lport, fp); 79442e9a92fSRobert Love } 79542e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 79642e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 79742e9a92fSRobert Love 79842e9a92fSRobert Love out: 79942e9a92fSRobert Love sp = fr_seq(rx_fp); 80042e9a92fSRobert Love fc_frame_free(rx_fp); 80142e9a92fSRobert Love } 80242e9a92fSRobert Love 80342e9a92fSRobert Love /** 80434f42a07SRobert Love * fc_lport_recv_req() - The generic lport request handler 80542e9a92fSRobert Love * @lport: The lport that received the request 80642e9a92fSRobert Love * @sp: The sequence the request is on 80742e9a92fSRobert Love * @fp: The frame the request is in 80842e9a92fSRobert Love * 80942e9a92fSRobert Love * This function will see if the lport handles the request or 81042e9a92fSRobert Love * if an rport should handle the request. 81142e9a92fSRobert Love * 81242e9a92fSRobert Love * Locking Note: This function should not be called with the lport 81342e9a92fSRobert Love * lock held becuase it will grab the lock. 81442e9a92fSRobert Love */ 81542e9a92fSRobert Love static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, 81642e9a92fSRobert Love struct fc_frame *fp) 81742e9a92fSRobert Love { 81842e9a92fSRobert Love struct fc_frame_header *fh = fc_frame_header_get(fp); 81942e9a92fSRobert Love void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); 82042e9a92fSRobert Love 82142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 82242e9a92fSRobert Love 82342e9a92fSRobert Love /* 82442e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 82542e9a92fSRobert Love * RSCN here. These don't require a session. 82642e9a92fSRobert Love * Even if we had a session, it might not be ready. 82742e9a92fSRobert Love */ 828e9ba8b42SJoe Eykholt if (!lport->link_up) 829e9ba8b42SJoe Eykholt fc_frame_free(fp); 830e9ba8b42SJoe Eykholt else if (fh->fh_type == FC_TYPE_ELS && 831e9ba8b42SJoe Eykholt fh->fh_r_ctl == FC_RCTL_ELS_REQ) { 83242e9a92fSRobert Love /* 83342e9a92fSRobert Love * Check opcode. 83442e9a92fSRobert Love */ 835131203a1SJoe Eykholt recv = lport->tt.rport_recv_req; 83642e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 83742e9a92fSRobert Love case ELS_FLOGI: 83842e9a92fSRobert Love recv = fc_lport_recv_flogi_req; 83942e9a92fSRobert Love break; 84042e9a92fSRobert Love case ELS_LOGO: 84142e9a92fSRobert Love fh = fc_frame_header_get(fp); 84242e9a92fSRobert Love if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) 84342e9a92fSRobert Love recv = fc_lport_recv_logo_req; 84442e9a92fSRobert Love break; 84542e9a92fSRobert Love case ELS_RSCN: 84642e9a92fSRobert Love recv = lport->tt.disc_recv_req; 84742e9a92fSRobert Love break; 84842e9a92fSRobert Love case ELS_ECHO: 84942e9a92fSRobert Love recv = fc_lport_recv_echo_req; 85042e9a92fSRobert Love break; 85142e9a92fSRobert Love case ELS_RLIR: 85242e9a92fSRobert Love recv = fc_lport_recv_rlir_req; 85342e9a92fSRobert Love break; 85442e9a92fSRobert Love case ELS_RNID: 85542e9a92fSRobert Love recv = fc_lport_recv_rnid_req; 85642e9a92fSRobert Love break; 85742e9a92fSRobert Love } 85842e9a92fSRobert Love 85942e9a92fSRobert Love recv(sp, fp, lport); 86042e9a92fSRobert Love } else { 8617414705eSRobert Love FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", 8627414705eSRobert Love fr_eof(fp)); 86342e9a92fSRobert Love fc_frame_free(fp); 86442e9a92fSRobert Love } 86542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 86642e9a92fSRobert Love 86742e9a92fSRobert Love /* 86842e9a92fSRobert Love * The common exch_done for all request may not be good 86942e9a92fSRobert Love * if any request requires longer hold on exhange. XXX 87042e9a92fSRobert Love */ 87142e9a92fSRobert Love lport->tt.exch_done(sp); 87242e9a92fSRobert Love } 87342e9a92fSRobert Love 87442e9a92fSRobert Love /** 87534f42a07SRobert Love * fc_lport_reset() - Reset an lport 87642e9a92fSRobert Love * @lport: The lport which should be reset 87742e9a92fSRobert Love * 87842e9a92fSRobert Love * Locking Note: This functions should not be called with the 87942e9a92fSRobert Love * lport lock held. 88042e9a92fSRobert Love */ 88142e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 88242e9a92fSRobert Love { 883f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 88442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 88542e9a92fSRobert Love fc_lport_enter_reset(lport); 88642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 88742e9a92fSRobert Love return 0; 88842e9a92fSRobert Love } 88942e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 89042e9a92fSRobert Love 89142e9a92fSRobert Love /** 8921190d925SJoe Eykholt * fc_lport_reset_locked() - Reset the local port 89342e9a92fSRobert Love * @lport: Fibre Channel local port to be reset 89442e9a92fSRobert Love * 89542e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 89642e9a92fSRobert Love * this routine. 89742e9a92fSRobert Love */ 8981190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 89942e9a92fSRobert Love { 90042e9a92fSRobert Love if (lport->dns_rp) 90142e9a92fSRobert Love lport->tt.rport_logoff(lport->dns_rp); 90242e9a92fSRobert Love 90342e9a92fSRobert Love lport->ptp_rp = NULL; 90442e9a92fSRobert Love 90542e9a92fSRobert Love lport->tt.disc_stop(lport); 90642e9a92fSRobert Love 9071f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 90842e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 90942e9a92fSRobert Love fc_host_port_id(lport->host) = 0; 9101190d925SJoe Eykholt } 91142e9a92fSRobert Love 9121190d925SJoe Eykholt /** 9131190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 9141190d925SJoe Eykholt * @lport: Fibre Channel local port to be reset 9151190d925SJoe Eykholt * 9161190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9171190d925SJoe Eykholt * this routine. 9181190d925SJoe Eykholt */ 9191190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 9201190d925SJoe Eykholt { 9211190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 9221190d925SJoe Eykholt fc_lport_state(lport)); 9231190d925SJoe Eykholt 9248faecddbSChris Leech if (lport->vport) { 9258faecddbSChris Leech if (lport->link_up) 9268faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); 9278faecddbSChris Leech else 9288faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); 9298faecddbSChris Leech } 9301190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 9318faecddbSChris Leech fc_vports_linkchange(lport); 9321190d925SJoe Eykholt fc_lport_reset_locked(lport); 933bc0e17f6SVasu Dev if (lport->link_up) 93442e9a92fSRobert Love fc_lport_enter_flogi(lport); 93542e9a92fSRobert Love } 93642e9a92fSRobert Love 93742e9a92fSRobert Love /** 9381190d925SJoe Eykholt * fc_lport_enter_disabled() - disable the local port 9391190d925SJoe Eykholt * @lport: Fibre Channel local port to be reset 9401190d925SJoe Eykholt * 9411190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9421190d925SJoe Eykholt * this routine. 9431190d925SJoe Eykholt */ 9441190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 9451190d925SJoe Eykholt { 9461190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 9471190d925SJoe Eykholt fc_lport_state(lport)); 9481190d925SJoe Eykholt 9491190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 9508faecddbSChris Leech fc_vports_linkchange(lport); 9511190d925SJoe Eykholt fc_lport_reset_locked(lport); 9521190d925SJoe Eykholt } 9531190d925SJoe Eykholt 9541190d925SJoe Eykholt /** 95534f42a07SRobert Love * fc_lport_error() - Handler for any errors 95642e9a92fSRobert Love * @lport: The fc_lport object 95742e9a92fSRobert Love * @fp: The frame pointer 95842e9a92fSRobert Love * 95942e9a92fSRobert Love * If the error was caused by a resource allocation failure 96042e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 96142e9a92fSRobert Love * after the e_d_tov time. 96242e9a92fSRobert Love */ 96342e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 96442e9a92fSRobert Love { 96542e9a92fSRobert Love unsigned long delay = 0; 9667414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 96742e9a92fSRobert Love PTR_ERR(fp), fc_lport_state(lport), 96842e9a92fSRobert Love lport->retry_count); 96942e9a92fSRobert Love 97042e9a92fSRobert Love if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { 97142e9a92fSRobert Love /* 97242e9a92fSRobert Love * Memory allocation failure, or the exchange timed out. 97342e9a92fSRobert Love * Retry after delay 97442e9a92fSRobert Love */ 97542e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 97642e9a92fSRobert Love lport->retry_count++; 97742e9a92fSRobert Love if (!fp) 97842e9a92fSRobert Love delay = msecs_to_jiffies(500); 97942e9a92fSRobert Love else 98042e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 98142e9a92fSRobert Love 98242e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 98342e9a92fSRobert Love } else { 98442e9a92fSRobert Love switch (lport->state) { 985b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 98642e9a92fSRobert Love case LPORT_ST_READY: 98742e9a92fSRobert Love case LPORT_ST_RESET: 988c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 9895baa17c3SChris Leech case LPORT_ST_RSNN_NN: 990c9866a54SChris Leech case LPORT_ST_RSPN_ID: 99142e9a92fSRobert Love case LPORT_ST_RFT_ID: 99242e9a92fSRobert Love case LPORT_ST_SCR: 99342e9a92fSRobert Love case LPORT_ST_DNS: 99442e9a92fSRobert Love case LPORT_ST_FLOGI: 99542e9a92fSRobert Love case LPORT_ST_LOGO: 99642e9a92fSRobert Love fc_lport_enter_reset(lport); 99742e9a92fSRobert Love break; 99842e9a92fSRobert Love } 99942e9a92fSRobert Love } 100042e9a92fSRobert Love } 100142e9a92fSRobert Love } 100242e9a92fSRobert Love 100342e9a92fSRobert Love /** 10047cccc157SChris Leech * fc_lport_ns_resp() - Handle response to a name server 10057cccc157SChris Leech * registration exchange 10067cccc157SChris Leech * @sp: current sequence in exchange 100742e9a92fSRobert Love * @fp: response frame 100842e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 100942e9a92fSRobert Love * 101042e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 101142e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 101242e9a92fSRobert Love * and then unlock the lport. 101342e9a92fSRobert Love */ 10147cccc157SChris Leech static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, 101542e9a92fSRobert Love void *lp_arg) 101642e9a92fSRobert Love { 101742e9a92fSRobert Love struct fc_lport *lport = lp_arg; 101842e9a92fSRobert Love struct fc_frame_header *fh; 101942e9a92fSRobert Love struct fc_ct_hdr *ct; 102042e9a92fSRobert Love 10217cccc157SChris Leech FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); 1022f657d299SJoe Eykholt 102342e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 102442e9a92fSRobert Love return; 102542e9a92fSRobert Love 102642e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 102742e9a92fSRobert Love 10287cccc157SChris Leech if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFT_ID) { 10297cccc157SChris Leech FC_LPORT_DBG(lport, "Received a name server response, " 10307cccc157SChris Leech "but in state %s\n", fc_lport_state(lport)); 103176f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 103276f6804eSAbhijeet Joglekar goto err; 103342e9a92fSRobert Love goto out; 103442e9a92fSRobert Love } 103542e9a92fSRobert Love 103676f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 103776f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 103876f6804eSAbhijeet Joglekar goto err; 103976f6804eSAbhijeet Joglekar } 104076f6804eSAbhijeet Joglekar 104142e9a92fSRobert Love fh = fc_frame_header_get(fp); 104242e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 104342e9a92fSRobert Love 104442e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 104542e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 104642e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 104742e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 10487cccc157SChris Leech switch (lport->state) { 10497cccc157SChris Leech case LPORT_ST_RNN_ID: 1050c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); 10517cccc157SChris Leech break; 10527cccc157SChris Leech case LPORT_ST_RSNN_NN: 1053c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); 10547cccc157SChris Leech break; 10557cccc157SChris Leech case LPORT_ST_RSPN_ID: 1056c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 10577cccc157SChris Leech break; 10587cccc157SChris Leech case LPORT_ST_RFT_ID: 10597cccc157SChris Leech fc_lport_enter_scr(lport); 10607cccc157SChris Leech break; 10617cccc157SChris Leech default: 10627cccc157SChris Leech /* should have already been caught by state checks */ 10637cccc157SChris Leech break; 10647cccc157SChris Leech } 1065c9c7bd7aSChris Leech else 1066c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1067c9c7bd7aSChris Leech out: 1068c9c7bd7aSChris Leech fc_frame_free(fp); 1069c9c7bd7aSChris Leech err: 1070c9c7bd7aSChris Leech mutex_unlock(&lport->lp_mutex); 1071c9c7bd7aSChris Leech } 1072c9c7bd7aSChris Leech 1073c9c7bd7aSChris Leech /** 107434f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 107542e9a92fSRobert Love * @sp: current sequence in SCR exchange 107642e9a92fSRobert Love * @fp: response frame 107742e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 107842e9a92fSRobert Love * 107942e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 108042e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 108142e9a92fSRobert Love * and then unlock the lport. 108242e9a92fSRobert Love */ 108342e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 108442e9a92fSRobert Love void *lp_arg) 108542e9a92fSRobert Love { 108642e9a92fSRobert Love struct fc_lport *lport = lp_arg; 108742e9a92fSRobert Love u8 op; 108842e9a92fSRobert Love 1089f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1090f657d299SJoe Eykholt 109142e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 109242e9a92fSRobert Love return; 109342e9a92fSRobert Love 109442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 109542e9a92fSRobert Love 109642e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 10977414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 10987414705eSRobert Love "%s\n", fc_lport_state(lport)); 109976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 110076f6804eSAbhijeet Joglekar goto err; 110142e9a92fSRobert Love goto out; 110242e9a92fSRobert Love } 110342e9a92fSRobert Love 110476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 110576f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 110676f6804eSAbhijeet Joglekar goto err; 110776f6804eSAbhijeet Joglekar } 110876f6804eSAbhijeet Joglekar 110942e9a92fSRobert Love op = fc_frame_payload_op(fp); 111042e9a92fSRobert Love if (op == ELS_LS_ACC) 111142e9a92fSRobert Love fc_lport_enter_ready(lport); 111242e9a92fSRobert Love else 111342e9a92fSRobert Love fc_lport_error(lport, fp); 111442e9a92fSRobert Love 111542e9a92fSRobert Love out: 111642e9a92fSRobert Love fc_frame_free(fp); 111742e9a92fSRobert Love err: 111842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 111942e9a92fSRobert Love } 112042e9a92fSRobert Love 112142e9a92fSRobert Love /** 112234f42a07SRobert Love * fc_lport_enter_scr() - Send a State Change Register (SCR) request 112342e9a92fSRobert Love * @lport: Fibre Channel local port to register for state changes 112442e9a92fSRobert Love * 112542e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 112642e9a92fSRobert Love * this routine. 112742e9a92fSRobert Love */ 112842e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 112942e9a92fSRobert Love { 113042e9a92fSRobert Love struct fc_frame *fp; 113142e9a92fSRobert Love 11327414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 11337414705eSRobert Love fc_lport_state(lport)); 113442e9a92fSRobert Love 113542e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 113642e9a92fSRobert Love 113742e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 113842e9a92fSRobert Love if (!fp) { 113942e9a92fSRobert Love fc_lport_error(lport, fp); 114042e9a92fSRobert Love return; 114142e9a92fSRobert Love } 114242e9a92fSRobert Love 1143a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 114442e9a92fSRobert Love fc_lport_scr_resp, lport, lport->e_d_tov)) 11458f550f93SChris Leech fc_lport_error(lport, NULL); 114642e9a92fSRobert Love } 114742e9a92fSRobert Love 114842e9a92fSRobert Love /** 1149c914f7d1SChris Leech * fc_lport_enter_ns() - register some object with the name server 115042e9a92fSRobert Love * @lport: Fibre Channel local port to register 115142e9a92fSRobert Love * 115242e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 115342e9a92fSRobert Love * this routine. 115442e9a92fSRobert Love */ 1155c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) 115642e9a92fSRobert Love { 115742e9a92fSRobert Love struct fc_frame *fp; 1158c914f7d1SChris Leech enum fc_ns_req cmd; 1159c914f7d1SChris Leech int size = sizeof(struct fc_ct_hdr); 1160c914f7d1SChris Leech size_t len; 116142e9a92fSRobert Love 1162c914f7d1SChris Leech FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1163c914f7d1SChris Leech fc_lport_state_names[state], 11647414705eSRobert Love fc_lport_state(lport)); 116542e9a92fSRobert Love 1166c914f7d1SChris Leech fc_lport_state_enter(lport, state); 116742e9a92fSRobert Love 1168c914f7d1SChris Leech switch (state) { 1169c914f7d1SChris Leech case LPORT_ST_RNN_ID: 1170c914f7d1SChris Leech cmd = FC_NS_RNN_ID; 1171c914f7d1SChris Leech size += sizeof(struct fc_ns_rn_id); 117242e9a92fSRobert Love break; 1173c914f7d1SChris Leech case LPORT_ST_RSNN_NN: 1174c9866a54SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1175c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1176c914f7d1SChris Leech if (!len) 1177c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1178c914f7d1SChris Leech cmd = FC_NS_RSNN_NN; 1179c914f7d1SChris Leech size += sizeof(struct fc_ns_rsnn) + len; 1180c914f7d1SChris Leech break; 1181c914f7d1SChris Leech case LPORT_ST_RSPN_ID: 11825baa17c3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1183c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1184c914f7d1SChris Leech if (!len) 1185c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1186c914f7d1SChris Leech cmd = FC_NS_RSPN_ID; 1187c914f7d1SChris Leech size += sizeof(struct fc_ns_rspn) + len; 1188c914f7d1SChris Leech break; 1189c914f7d1SChris Leech case LPORT_ST_RFT_ID: 1190c914f7d1SChris Leech cmd = FC_NS_RFT_ID; 1191c914f7d1SChris Leech size += sizeof(struct fc_ns_rft); 1192c914f7d1SChris Leech break; 1193c914f7d1SChris Leech default: 1194c914f7d1SChris Leech fc_lport_error(lport, NULL); 1195c914f7d1SChris Leech return; 1196c914f7d1SChris Leech } 1197c914f7d1SChris Leech 1198c914f7d1SChris Leech fp = fc_frame_alloc(lport, size); 11995baa17c3SChris Leech if (!fp) { 12005baa17c3SChris Leech fc_lport_error(lport, fp); 12015baa17c3SChris Leech return; 12025baa17c3SChris Leech } 12035baa17c3SChris Leech 1204c914f7d1SChris Leech if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, 12057cccc157SChris Leech fc_lport_ns_resp, 1206c9c7bd7aSChris Leech lport, lport->e_d_tov)) 1207c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1208c9c7bd7aSChris Leech } 1209c9c7bd7aSChris Leech 121042e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 121142e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 121242e9a92fSRobert Love }; 121342e9a92fSRobert Love 121442e9a92fSRobert Love /** 121534f42a07SRobert Love * fc_rport_enter_dns() - Create a rport to the name server 121642e9a92fSRobert Love * @lport: Fibre Channel local port requesting a rport for the name server 121742e9a92fSRobert Love * 121842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 121942e9a92fSRobert Love * this routine. 122042e9a92fSRobert Love */ 122142e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 122242e9a92fSRobert Love { 1223ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 122442e9a92fSRobert Love 12257414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 12267414705eSRobert Love fc_lport_state(lport)); 122742e9a92fSRobert Love 122842e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 122942e9a92fSRobert Love 123048f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 12319737e6a7SRobert Love rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); 123248f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 12339fb9d328SJoe Eykholt if (!rdata) 123442e9a92fSRobert Love goto err; 123542e9a92fSRobert Love 123642e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 12379fb9d328SJoe Eykholt lport->tt.rport_login(rdata); 123842e9a92fSRobert Love return; 123942e9a92fSRobert Love 124042e9a92fSRobert Love err: 124142e9a92fSRobert Love fc_lport_error(lport, NULL); 124242e9a92fSRobert Love } 124342e9a92fSRobert Love 124442e9a92fSRobert Love /** 124534f42a07SRobert Love * fc_lport_timeout() - Handler for the retry_work timer. 124642e9a92fSRobert Love * @work: The work struct of the fc_lport 124742e9a92fSRobert Love */ 124842e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 124942e9a92fSRobert Love { 125042e9a92fSRobert Love struct fc_lport *lport = 125142e9a92fSRobert Love container_of(work, struct fc_lport, 125242e9a92fSRobert Love retry_work.work); 125342e9a92fSRobert Love 125442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 125542e9a92fSRobert Love 125642e9a92fSRobert Love switch (lport->state) { 1257b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 125842e9a92fSRobert Love WARN_ON(1); 125942e9a92fSRobert Love break; 126022655ac2SJoe Eykholt case LPORT_ST_READY: 126122655ac2SJoe Eykholt WARN_ON(1); 126222655ac2SJoe Eykholt break; 126322655ac2SJoe Eykholt case LPORT_ST_RESET: 126422655ac2SJoe Eykholt break; 126542e9a92fSRobert Love case LPORT_ST_FLOGI: 126642e9a92fSRobert Love fc_lport_enter_flogi(lport); 126742e9a92fSRobert Love break; 126842e9a92fSRobert Love case LPORT_ST_DNS: 126942e9a92fSRobert Love fc_lport_enter_dns(lport); 127042e9a92fSRobert Love break; 1271c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 12725baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1273c9866a54SChris Leech case LPORT_ST_RSPN_ID: 127442e9a92fSRobert Love case LPORT_ST_RFT_ID: 1275c914f7d1SChris Leech fc_lport_enter_ns(lport, lport->state); 127642e9a92fSRobert Love break; 127742e9a92fSRobert Love case LPORT_ST_SCR: 127842e9a92fSRobert Love fc_lport_enter_scr(lport); 127942e9a92fSRobert Love break; 128042e9a92fSRobert Love case LPORT_ST_LOGO: 128142e9a92fSRobert Love fc_lport_enter_logo(lport); 128242e9a92fSRobert Love break; 128342e9a92fSRobert Love } 128442e9a92fSRobert Love 128542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 128642e9a92fSRobert Love } 128742e9a92fSRobert Love 128842e9a92fSRobert Love /** 128934f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 129042e9a92fSRobert Love * @sp: current sequence in LOGO exchange 129142e9a92fSRobert Love * @fp: response frame 129242e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the LOGO request 129342e9a92fSRobert Love * 129442e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 129542e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 129642e9a92fSRobert Love * and then unlock the lport. 129742e9a92fSRobert Love */ 129811b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 129942e9a92fSRobert Love void *lp_arg) 130042e9a92fSRobert Love { 130142e9a92fSRobert Love struct fc_lport *lport = lp_arg; 130242e9a92fSRobert Love u8 op; 130342e9a92fSRobert Love 1304f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1305f657d299SJoe Eykholt 130642e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 130742e9a92fSRobert Love return; 130842e9a92fSRobert Love 130942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 131042e9a92fSRobert Love 131142e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 13127414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 13137414705eSRobert Love "%s\n", fc_lport_state(lport)); 131476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 131576f6804eSAbhijeet Joglekar goto err; 131642e9a92fSRobert Love goto out; 131742e9a92fSRobert Love } 131842e9a92fSRobert Love 131976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 132076f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 132176f6804eSAbhijeet Joglekar goto err; 132276f6804eSAbhijeet Joglekar } 132376f6804eSAbhijeet Joglekar 132442e9a92fSRobert Love op = fc_frame_payload_op(fp); 132542e9a92fSRobert Love if (op == ELS_LS_ACC) 13261190d925SJoe Eykholt fc_lport_enter_disabled(lport); 132742e9a92fSRobert Love else 132842e9a92fSRobert Love fc_lport_error(lport, fp); 132942e9a92fSRobert Love 133042e9a92fSRobert Love out: 133142e9a92fSRobert Love fc_frame_free(fp); 133242e9a92fSRobert Love err: 133342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 133442e9a92fSRobert Love } 133511b56188SChris Leech EXPORT_SYMBOL(fc_lport_logo_resp); 133642e9a92fSRobert Love 133742e9a92fSRobert Love /** 133834f42a07SRobert Love * fc_rport_enter_logo() - Logout of the fabric 133942e9a92fSRobert Love * @lport: Fibre Channel local port to be logged out 134042e9a92fSRobert Love * 134142e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 134242e9a92fSRobert Love * this routine. 134342e9a92fSRobert Love */ 134442e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 134542e9a92fSRobert Love { 134642e9a92fSRobert Love struct fc_frame *fp; 134742e9a92fSRobert Love struct fc_els_logo *logo; 134842e9a92fSRobert Love 13497414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 13507414705eSRobert Love fc_lport_state(lport)); 135142e9a92fSRobert Love 135242e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 13538faecddbSChris Leech fc_vports_linkchange(lport); 135442e9a92fSRobert Love 135542e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 135642e9a92fSRobert Love if (!fp) { 135742e9a92fSRobert Love fc_lport_error(lport, fp); 135842e9a92fSRobert Love return; 135942e9a92fSRobert Love } 136042e9a92fSRobert Love 1361a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1362a46f327aSJoe Eykholt fc_lport_logo_resp, lport, lport->e_d_tov)) 13638f550f93SChris Leech fc_lport_error(lport, NULL); 136442e9a92fSRobert Love } 136542e9a92fSRobert Love 136642e9a92fSRobert Love /** 136734f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 136842e9a92fSRobert Love * @sp: current sequence in FLOGI exchange 136942e9a92fSRobert Love * @fp: response frame 137042e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the FLOGI request 137142e9a92fSRobert Love * 137242e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 137342e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 137442e9a92fSRobert Love * and then unlock the lport. 137542e9a92fSRobert Love */ 137611b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 137742e9a92fSRobert Love void *lp_arg) 137842e9a92fSRobert Love { 137942e9a92fSRobert Love struct fc_lport *lport = lp_arg; 138042e9a92fSRobert Love struct fc_frame_header *fh; 138142e9a92fSRobert Love struct fc_els_flogi *flp; 138242e9a92fSRobert Love u32 did; 138342e9a92fSRobert Love u16 csp_flags; 138442e9a92fSRobert Love unsigned int r_a_tov; 138542e9a92fSRobert Love unsigned int e_d_tov; 138642e9a92fSRobert Love u16 mfs; 138742e9a92fSRobert Love 1388f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1389f657d299SJoe Eykholt 139042e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 139142e9a92fSRobert Love return; 139242e9a92fSRobert Love 139342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 139442e9a92fSRobert Love 139542e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 13967414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 13977414705eSRobert Love "%s\n", fc_lport_state(lport)); 139876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 139976f6804eSAbhijeet Joglekar goto err; 140042e9a92fSRobert Love goto out; 140142e9a92fSRobert Love } 140242e9a92fSRobert Love 140376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 140476f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 140576f6804eSAbhijeet Joglekar goto err; 140676f6804eSAbhijeet Joglekar } 140776f6804eSAbhijeet Joglekar 140842e9a92fSRobert Love fh = fc_frame_header_get(fp); 140942e9a92fSRobert Love did = ntoh24(fh->fh_d_id); 141042e9a92fSRobert Love if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { 141142e9a92fSRobert Love 14127414705eSRobert Love printk(KERN_INFO "libfc: Assigned FID (%6x) in FLOGI response\n", 14137414705eSRobert Love did); 141442e9a92fSRobert Love fc_host_port_id(lport->host) = did; 141542e9a92fSRobert Love 141642e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 141742e9a92fSRobert Love if (flp) { 141842e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 141942e9a92fSRobert Love FC_SP_BB_DATA_MASK; 142042e9a92fSRobert Love if (mfs >= FC_SP_MIN_MAX_PAYLOAD && 142142e9a92fSRobert Love mfs < lport->mfs) 142242e9a92fSRobert Love lport->mfs = mfs; 142342e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 142442e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 142542e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 142642e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 142742e9a92fSRobert Love e_d_tov /= 1000000; 1428db36c06cSChris Leech 1429db36c06cSChris Leech lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); 1430db36c06cSChris Leech 143142e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 143242e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 143342e9a92fSRobert Love lport->e_d_tov = e_d_tov; 143442e9a92fSRobert Love lport->r_a_tov = 2 * e_d_tov; 14357414705eSRobert Love printk(KERN_INFO "libfc: Port (%6x) entered " 14367414705eSRobert Love "point to point mode\n", did); 143742e9a92fSRobert Love fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), 143842e9a92fSRobert Love get_unaligned_be64( 143942e9a92fSRobert Love &flp->fl_wwpn), 144042e9a92fSRobert Love get_unaligned_be64( 144142e9a92fSRobert Love &flp->fl_wwnn)); 144242e9a92fSRobert Love } else { 144342e9a92fSRobert Love lport->e_d_tov = e_d_tov; 144442e9a92fSRobert Love lport->r_a_tov = r_a_tov; 144542e9a92fSRobert Love fc_host_fabric_name(lport->host) = 144642e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 144742e9a92fSRobert Love fc_lport_enter_dns(lport); 144842e9a92fSRobert Love } 144942e9a92fSRobert Love } 145042e9a92fSRobert Love } else { 14517414705eSRobert Love FC_LPORT_DBG(lport, "Bad FLOGI response\n"); 145242e9a92fSRobert Love } 145342e9a92fSRobert Love 145442e9a92fSRobert Love out: 145542e9a92fSRobert Love fc_frame_free(fp); 145642e9a92fSRobert Love err: 145742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 145842e9a92fSRobert Love } 145911b56188SChris Leech EXPORT_SYMBOL(fc_lport_flogi_resp); 146042e9a92fSRobert Love 146142e9a92fSRobert Love /** 146234f42a07SRobert Love * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager 146342e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 146442e9a92fSRobert Love * 146542e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 146642e9a92fSRobert Love * this routine. 146742e9a92fSRobert Love */ 146842e9a92fSRobert Love void fc_lport_enter_flogi(struct fc_lport *lport) 146942e9a92fSRobert Love { 147042e9a92fSRobert Love struct fc_frame *fp; 147142e9a92fSRobert Love 14727414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 14737414705eSRobert Love fc_lport_state(lport)); 147442e9a92fSRobert Love 147542e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 147642e9a92fSRobert Love 147742e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 147842e9a92fSRobert Love if (!fp) 147942e9a92fSRobert Love return fc_lport_error(lport, fp); 148042e9a92fSRobert Love 1481db36c06cSChris Leech if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, 1482db36c06cSChris Leech lport->vport ? ELS_FDISC : ELS_FLOGI, 148342e9a92fSRobert Love fc_lport_flogi_resp, lport, lport->e_d_tov)) 14848f550f93SChris Leech fc_lport_error(lport, NULL); 148542e9a92fSRobert Love } 148642e9a92fSRobert Love 148742e9a92fSRobert Love /* Configure a fc_lport */ 148842e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 148942e9a92fSRobert Love { 149042e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 149142e9a92fSRobert Love mutex_init(&lport->lp_mutex); 149242e9a92fSRobert Love 1493b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 149442e9a92fSRobert Love 149542e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 149642e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 149742e9a92fSRobert Love 149842e9a92fSRobert Love return 0; 149942e9a92fSRobert Love } 150042e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 150142e9a92fSRobert Love 150242e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 150342e9a92fSRobert Love { 150442e9a92fSRobert Love if (!lport->tt.lport_recv) 150542e9a92fSRobert Love lport->tt.lport_recv = fc_lport_recv_req; 150642e9a92fSRobert Love 150742e9a92fSRobert Love if (!lport->tt.lport_reset) 150842e9a92fSRobert Love lport->tt.lport_reset = fc_lport_reset; 150942e9a92fSRobert Love 151042e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 151142e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 151242e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 151342e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 151442e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 151542e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 151642e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 151742e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 151842e9a92fSRobert Love 151942e9a92fSRobert Love /* This value is also unchanging */ 152042e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 152142e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 152242e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 152342e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 152442e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 152542e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 152642e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 152742e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 152842e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 152942e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 153042e9a92fSRobert Love 153142e9a92fSRobert Love return 0; 153242e9a92fSRobert Love } 153342e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1534a51ab396SSteve Ma 1535a51ab396SSteve Ma /** 1536a51ab396SSteve Ma * fc_lport_bsg_resp() - The common response handler for fc pass-thru requests 1537a51ab396SSteve Ma * @sp: current sequence in the fc pass-thru request exchange 1538a51ab396SSteve Ma * @fp: received response frame 1539a51ab396SSteve Ma * @info_arg: pointer to struct fc_bsg_info 1540a51ab396SSteve Ma */ 1541a51ab396SSteve Ma static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, 1542a51ab396SSteve Ma void *info_arg) 1543a51ab396SSteve Ma { 1544a51ab396SSteve Ma struct fc_bsg_info *info = info_arg; 1545a51ab396SSteve Ma struct fc_bsg_job *job = info->job; 1546a51ab396SSteve Ma struct fc_lport *lport = info->lport; 1547a51ab396SSteve Ma struct fc_frame_header *fh; 1548a51ab396SSteve Ma size_t len; 1549a51ab396SSteve Ma void *buf; 1550a51ab396SSteve Ma 1551a51ab396SSteve Ma if (IS_ERR(fp)) { 1552a51ab396SSteve Ma job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? 1553a51ab396SSteve Ma -ECONNABORTED : -ETIMEDOUT; 1554a51ab396SSteve Ma job->reply_len = sizeof(uint32_t); 1555a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1556a51ab396SSteve Ma job->job_done(job); 1557a51ab396SSteve Ma kfree(info); 1558a51ab396SSteve Ma return; 1559a51ab396SSteve Ma } 1560a51ab396SSteve Ma 1561a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1562a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1563a51ab396SSteve Ma len = fr_len(fp) - sizeof(*fh); 1564a51ab396SSteve Ma buf = fc_frame_payload_get(fp, 0); 1565a51ab396SSteve Ma 1566a51ab396SSteve Ma if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { 1567a51ab396SSteve Ma /* Get the response code from the first frame payload */ 1568a51ab396SSteve Ma unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? 1569a51ab396SSteve Ma ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : 1570a51ab396SSteve Ma (unsigned short)fc_frame_payload_op(fp); 1571a51ab396SSteve Ma 1572a51ab396SSteve Ma /* Save the reply status of the job */ 1573a51ab396SSteve Ma job->reply->reply_data.ctels_reply.status = 1574a51ab396SSteve Ma (cmd == info->rsp_code) ? 1575a51ab396SSteve Ma FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; 1576a51ab396SSteve Ma } 1577a51ab396SSteve Ma 1578a51ab396SSteve Ma job->reply->reply_payload_rcv_len += 1579a51ab396SSteve Ma fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, 1580a51ab396SSteve Ma &info->offset, KM_BIO_SRC_IRQ, NULL); 1581a51ab396SSteve Ma 1582a51ab396SSteve Ma if (fr_eof(fp) == FC_EOF_T && 1583a51ab396SSteve Ma (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == 1584a51ab396SSteve Ma (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { 1585a51ab396SSteve Ma if (job->reply->reply_payload_rcv_len > 1586a51ab396SSteve Ma job->reply_payload.payload_len) 1587a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 1588a51ab396SSteve Ma job->reply_payload.payload_len; 1589a51ab396SSteve Ma job->reply->result = 0; 1590a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1591a51ab396SSteve Ma job->job_done(job); 1592a51ab396SSteve Ma kfree(info); 1593a51ab396SSteve Ma } 1594a51ab396SSteve Ma fc_frame_free(fp); 1595a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1596a51ab396SSteve Ma } 1597a51ab396SSteve Ma 1598a51ab396SSteve Ma /** 1599a51ab396SSteve Ma * fc_lport_els_request() - Send ELS pass-thru request 1600a51ab396SSteve Ma * @job: The bsg fc pass-thru job structure 1601a51ab396SSteve Ma * @lport: The local port sending the request 1602a51ab396SSteve Ma * @did: The destination port id. 1603a51ab396SSteve Ma * 1604a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1605a51ab396SSteve Ma * this routine. 1606a51ab396SSteve Ma */ 1607a51ab396SSteve Ma static int fc_lport_els_request(struct fc_bsg_job *job, 1608a51ab396SSteve Ma struct fc_lport *lport, 1609a51ab396SSteve Ma u32 did, u32 tov) 1610a51ab396SSteve Ma { 1611a51ab396SSteve Ma struct fc_bsg_info *info; 1612a51ab396SSteve Ma struct fc_frame *fp; 1613a51ab396SSteve Ma struct fc_frame_header *fh; 1614a51ab396SSteve Ma char *pp; 1615a51ab396SSteve Ma int len; 1616a51ab396SSteve Ma 1617a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_frame_header) + 1618a51ab396SSteve Ma job->request_payload.payload_len); 1619a51ab396SSteve Ma if (!fp) 1620a51ab396SSteve Ma return -ENOMEM; 1621a51ab396SSteve Ma 1622a51ab396SSteve Ma len = job->request_payload.payload_len; 1623a51ab396SSteve Ma pp = fc_frame_payload_get(fp, len); 1624a51ab396SSteve Ma 1625a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1626a51ab396SSteve Ma job->request_payload.sg_cnt, 1627a51ab396SSteve Ma pp, len); 1628a51ab396SSteve Ma 1629a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1630a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_ELS_REQ; 1631a51ab396SSteve Ma hton24(fh->fh_d_id, did); 1632a51ab396SSteve Ma hton24(fh->fh_s_id, fc_host_port_id(lport->host)); 1633a51ab396SSteve Ma fh->fh_type = FC_TYPE_ELS; 1634a51ab396SSteve Ma hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | 1635a51ab396SSteve Ma FC_FC_END_SEQ | FC_FC_SEQ_INIT); 1636a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1637a51ab396SSteve Ma fh->fh_df_ctl = 0; 1638a51ab396SSteve Ma fh->fh_parm_offset = 0; 1639a51ab396SSteve Ma 1640a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1641a51ab396SSteve Ma if (!info) { 1642a51ab396SSteve Ma fc_frame_free(fp); 1643a51ab396SSteve Ma return -ENOMEM; 1644a51ab396SSteve Ma } 1645a51ab396SSteve Ma 1646a51ab396SSteve Ma info->job = job; 1647a51ab396SSteve Ma info->lport = lport; 1648a51ab396SSteve Ma info->rsp_code = ELS_LS_ACC; 1649a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1650a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1651a51ab396SSteve Ma 1652a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1653a51ab396SSteve Ma NULL, info, tov)) 1654a51ab396SSteve Ma return -ECOMM; 1655a51ab396SSteve Ma return 0; 1656a51ab396SSteve Ma } 1657a51ab396SSteve Ma 1658a51ab396SSteve Ma /** 1659a51ab396SSteve Ma * fc_lport_ct_request() - Send CT pass-thru request 1660a51ab396SSteve Ma * @job: The bsg fc pass-thru job structure 1661a51ab396SSteve Ma * @lport: The local port sending the request 1662a51ab396SSteve Ma * @did: The destination FC-ID 1663a51ab396SSteve Ma * @tov: The time to wait for a response 1664a51ab396SSteve Ma * 1665a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1666a51ab396SSteve Ma * this routine. 1667a51ab396SSteve Ma */ 1668a51ab396SSteve Ma static int fc_lport_ct_request(struct fc_bsg_job *job, 1669a51ab396SSteve Ma struct fc_lport *lport, u32 did, u32 tov) 1670a51ab396SSteve Ma { 1671a51ab396SSteve Ma struct fc_bsg_info *info; 1672a51ab396SSteve Ma struct fc_frame *fp; 1673a51ab396SSteve Ma struct fc_frame_header *fh; 1674a51ab396SSteve Ma struct fc_ct_req *ct; 1675a51ab396SSteve Ma size_t len; 1676a51ab396SSteve Ma 1677a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 1678a51ab396SSteve Ma job->request_payload.payload_len); 1679a51ab396SSteve Ma if (!fp) 1680a51ab396SSteve Ma return -ENOMEM; 1681a51ab396SSteve Ma 1682a51ab396SSteve Ma len = job->request_payload.payload_len; 1683a51ab396SSteve Ma ct = fc_frame_payload_get(fp, len); 1684a51ab396SSteve Ma 1685a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1686a51ab396SSteve Ma job->request_payload.sg_cnt, 1687a51ab396SSteve Ma ct, len); 1688a51ab396SSteve Ma 1689a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1690a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; 1691a51ab396SSteve Ma hton24(fh->fh_d_id, did); 1692a51ab396SSteve Ma hton24(fh->fh_s_id, fc_host_port_id(lport->host)); 1693a51ab396SSteve Ma fh->fh_type = FC_TYPE_CT; 1694a51ab396SSteve Ma hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | 1695a51ab396SSteve Ma FC_FC_END_SEQ | FC_FC_SEQ_INIT); 1696a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1697a51ab396SSteve Ma fh->fh_df_ctl = 0; 1698a51ab396SSteve Ma fh->fh_parm_offset = 0; 1699a51ab396SSteve Ma 1700a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1701a51ab396SSteve Ma if (!info) { 1702a51ab396SSteve Ma fc_frame_free(fp); 1703a51ab396SSteve Ma return -ENOMEM; 1704a51ab396SSteve Ma } 1705a51ab396SSteve Ma 1706a51ab396SSteve Ma info->job = job; 1707a51ab396SSteve Ma info->lport = lport; 1708a51ab396SSteve Ma info->rsp_code = FC_FS_ACC; 1709a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1710a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1711a51ab396SSteve Ma 1712a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1713a51ab396SSteve Ma NULL, info, tov)) 1714a51ab396SSteve Ma return -ECOMM; 1715a51ab396SSteve Ma return 0; 1716a51ab396SSteve Ma } 1717a51ab396SSteve Ma 1718a51ab396SSteve Ma /** 1719a51ab396SSteve Ma * fc_lport_bsg_request() - The common entry point for sending 1720a51ab396SSteve Ma * fc pass-thru requests 1721a51ab396SSteve Ma * @job: The fc pass-thru job structure 1722a51ab396SSteve Ma */ 1723a51ab396SSteve Ma int fc_lport_bsg_request(struct fc_bsg_job *job) 1724a51ab396SSteve Ma { 1725a51ab396SSteve Ma struct request *rsp = job->req->next_rq; 1726a51ab396SSteve Ma struct Scsi_Host *shost = job->shost; 1727a51ab396SSteve Ma struct fc_lport *lport = shost_priv(shost); 1728a51ab396SSteve Ma struct fc_rport *rport; 1729a51ab396SSteve Ma struct fc_rport_priv *rdata; 1730a51ab396SSteve Ma int rc = -EINVAL; 1731a51ab396SSteve Ma u32 did; 1732a51ab396SSteve Ma 1733a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 0; 1734a51ab396SSteve Ma rsp->resid_len = job->reply_payload.payload_len; 1735a51ab396SSteve Ma 1736a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1737a51ab396SSteve Ma 1738a51ab396SSteve Ma switch (job->request->msgcode) { 1739a51ab396SSteve Ma case FC_BSG_RPT_ELS: 1740a51ab396SSteve Ma rport = job->rport; 1741a51ab396SSteve Ma if (!rport) 1742a51ab396SSteve Ma break; 1743a51ab396SSteve Ma 1744a51ab396SSteve Ma rdata = rport->dd_data; 1745a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, rport->port_id, 1746a51ab396SSteve Ma rdata->e_d_tov); 1747a51ab396SSteve Ma break; 1748a51ab396SSteve Ma 1749a51ab396SSteve Ma case FC_BSG_RPT_CT: 1750a51ab396SSteve Ma rport = job->rport; 1751a51ab396SSteve Ma if (!rport) 1752a51ab396SSteve Ma break; 1753a51ab396SSteve Ma 1754a51ab396SSteve Ma rdata = rport->dd_data; 1755a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, rport->port_id, 1756a51ab396SSteve Ma rdata->e_d_tov); 1757a51ab396SSteve Ma break; 1758a51ab396SSteve Ma 1759a51ab396SSteve Ma case FC_BSG_HST_CT: 1760a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_ct.port_id); 1761a51ab396SSteve Ma if (did == FC_FID_DIR_SERV) 1762a51ab396SSteve Ma rdata = lport->dns_rp; 1763a51ab396SSteve Ma else 1764a51ab396SSteve Ma rdata = lport->tt.rport_lookup(lport, did); 1765a51ab396SSteve Ma 1766a51ab396SSteve Ma if (!rdata) 1767a51ab396SSteve Ma break; 1768a51ab396SSteve Ma 1769a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); 1770a51ab396SSteve Ma break; 1771a51ab396SSteve Ma 1772a51ab396SSteve Ma case FC_BSG_HST_ELS_NOLOGIN: 1773a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_els.port_id); 1774a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); 1775a51ab396SSteve Ma break; 1776a51ab396SSteve Ma } 1777a51ab396SSteve Ma 1778a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1779a51ab396SSteve Ma return rc; 1780a51ab396SSteve Ma } 1781a51ab396SSteve Ma EXPORT_SYMBOL(fc_lport_bsg_request); 1782