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 59af901ca1SAndré Goddard Rosa * notification. Currently, successful 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> 915a0e3ad6STejun Heo #include <linux/slab.h> 9242e9a92fSRobert Love #include <asm/unaligned.h> 9342e9a92fSRobert Love 9442e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 9542e9a92fSRobert Love 9642e9a92fSRobert Love #include <scsi/libfc.h> 9742e9a92fSRobert Love #include <scsi/fc_encode.h> 98a51ab396SSteve Ma #include <linux/scatterlist.h> 9942e9a92fSRobert Love 1008866a5d9SRobert Love #include "fc_libfc.h" 1018866a5d9SRobert Love 10242e9a92fSRobert Love /* Fabric IDs to use for point-to-point mode, chosen on whims. */ 10342e9a92fSRobert Love #define FC_LOCAL_PTP_FID_LO 0x010101 10442e9a92fSRobert Love #define FC_LOCAL_PTP_FID_HI 0x010102 10542e9a92fSRobert Love 10642e9a92fSRobert Love #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ 10742e9a92fSRobert Love 10842e9a92fSRobert Love static void fc_lport_error(struct fc_lport *, struct fc_frame *); 10942e9a92fSRobert Love 11042e9a92fSRobert Love static void fc_lport_enter_reset(struct fc_lport *); 11142e9a92fSRobert Love static void fc_lport_enter_flogi(struct fc_lport *); 11242e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *); 113c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); 11442e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *); 11542e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *); 11642e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *); 11742e9a92fSRobert Love 11842e9a92fSRobert Love static const char *fc_lport_state_names[] = { 119b1d9fd55SJoe Eykholt [LPORT_ST_DISABLED] = "disabled", 12042e9a92fSRobert Love [LPORT_ST_FLOGI] = "FLOGI", 12142e9a92fSRobert Love [LPORT_ST_DNS] = "dNS", 122c9c7bd7aSChris Leech [LPORT_ST_RNN_ID] = "RNN_ID", 1235baa17c3SChris Leech [LPORT_ST_RSNN_NN] = "RSNN_NN", 124c9866a54SChris Leech [LPORT_ST_RSPN_ID] = "RSPN_ID", 12542e9a92fSRobert Love [LPORT_ST_RFT_ID] = "RFT_ID", 126ab593b18SJoe Eykholt [LPORT_ST_RFF_ID] = "RFF_ID", 12742e9a92fSRobert Love [LPORT_ST_SCR] = "SCR", 12842e9a92fSRobert Love [LPORT_ST_READY] = "Ready", 12942e9a92fSRobert Love [LPORT_ST_LOGO] = "LOGO", 13042e9a92fSRobert Love [LPORT_ST_RESET] = "reset", 13142e9a92fSRobert Love }; 13242e9a92fSRobert Love 133a51ab396SSteve Ma /** 134a51ab396SSteve Ma * struct fc_bsg_info - FC Passthrough managemet structure 135a51ab396SSteve Ma * @job: The passthrough job 136a51ab396SSteve Ma * @lport: The local port to pass through a command 137a51ab396SSteve Ma * @rsp_code: The expected response code 138a51ab396SSteve Ma * @sg: job->reply_payload.sg_list 139a51ab396SSteve Ma * @nents: job->reply_payload.sg_cnt 140a51ab396SSteve Ma * @offset: The offset into the response data 141a51ab396SSteve Ma */ 142a51ab396SSteve Ma struct fc_bsg_info { 143a51ab396SSteve Ma struct fc_bsg_job *job; 144a51ab396SSteve Ma struct fc_lport *lport; 145a51ab396SSteve Ma u16 rsp_code; 146a51ab396SSteve Ma struct scatterlist *sg; 147a51ab396SSteve Ma u32 nents; 148a51ab396SSteve Ma size_t offset; 149a51ab396SSteve Ma }; 150a51ab396SSteve Ma 1513a3b42bfSRobert Love /** 1523a3b42bfSRobert Love * fc_frame_drop() - Dummy frame handler 1533a3b42bfSRobert Love * @lport: The local port the frame was received on 1543a3b42bfSRobert Love * @fp: The received frame 1553a3b42bfSRobert Love */ 15642e9a92fSRobert Love static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) 15742e9a92fSRobert Love { 15842e9a92fSRobert Love fc_frame_free(fp); 15942e9a92fSRobert Love return 0; 16042e9a92fSRobert Love } 16142e9a92fSRobert Love 16242e9a92fSRobert Love /** 16334f42a07SRobert Love * fc_lport_rport_callback() - Event handler for rport events 16442e9a92fSRobert Love * @lport: The lport which is receiving the event 1659fb9d328SJoe Eykholt * @rdata: private remote port data 16642e9a92fSRobert Love * @event: The event that occured 16742e9a92fSRobert Love * 16842e9a92fSRobert Love * Locking Note: The rport lock should not be held when calling 16942e9a92fSRobert Love * this function. 17042e9a92fSRobert Love */ 17142e9a92fSRobert Love static void fc_lport_rport_callback(struct fc_lport *lport, 1729fb9d328SJoe Eykholt struct fc_rport_priv *rdata, 17342e9a92fSRobert Love enum fc_rport_event event) 17442e9a92fSRobert Love { 175ce8b5df0SChris Leech FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event, 176f211fa51SJoe Eykholt rdata->ids.port_id); 17742e9a92fSRobert Love 178b5cbf083SJoe Eykholt mutex_lock(&lport->lp_mutex); 17942e9a92fSRobert Love switch (event) { 1804c0f62b5SJoe Eykholt case RPORT_EV_READY: 18142e9a92fSRobert Love if (lport->state == LPORT_ST_DNS) { 1823a3b42bfSRobert Love lport->dns_rdata = rdata; 183c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); 18442e9a92fSRobert Love } else { 1854c0f62b5SJoe Eykholt FC_LPORT_DBG(lport, "Received an READY event " 186ce8b5df0SChris Leech "on port (%6.6x) for the directory " 18742e9a92fSRobert Love "server, but the lport is not " 18842e9a92fSRobert Love "in the DNS state, it's in the " 189f211fa51SJoe Eykholt "%d state", rdata->ids.port_id, 19042e9a92fSRobert Love lport->state); 1919fb9d328SJoe Eykholt lport->tt.rport_logoff(rdata); 19242e9a92fSRobert Love } 19342e9a92fSRobert Love break; 19442e9a92fSRobert Love case RPORT_EV_LOGO: 19542e9a92fSRobert Love case RPORT_EV_FAILED: 19642e9a92fSRobert Love case RPORT_EV_STOP: 1973a3b42bfSRobert Love lport->dns_rdata = NULL; 19842e9a92fSRobert Love break; 19942e9a92fSRobert Love case RPORT_EV_NONE: 20042e9a92fSRobert Love break; 20142e9a92fSRobert Love } 202b5cbf083SJoe Eykholt mutex_unlock(&lport->lp_mutex); 20342e9a92fSRobert Love } 20442e9a92fSRobert Love 20542e9a92fSRobert Love /** 20634f42a07SRobert Love * fc_lport_state() - Return a string which represents the lport's state 20742e9a92fSRobert Love * @lport: The lport whose state is to converted to a string 20842e9a92fSRobert Love */ 20942e9a92fSRobert Love static const char *fc_lport_state(struct fc_lport *lport) 21042e9a92fSRobert Love { 21142e9a92fSRobert Love const char *cp; 21242e9a92fSRobert Love 21342e9a92fSRobert Love cp = fc_lport_state_names[lport->state]; 21442e9a92fSRobert Love if (!cp) 21542e9a92fSRobert Love cp = "unknown"; 21642e9a92fSRobert Love return cp; 21742e9a92fSRobert Love } 21842e9a92fSRobert Love 21942e9a92fSRobert Love /** 22034f42a07SRobert Love * fc_lport_ptp_setup() - Create an rport for point-to-point mode 22142e9a92fSRobert Love * @lport: The lport to attach the ptp rport to 2223a3b42bfSRobert Love * @remote_fid: The FID of the ptp rport 22342e9a92fSRobert Love * @remote_wwpn: The WWPN of the ptp rport 22442e9a92fSRobert Love * @remote_wwnn: The WWNN of the ptp rport 22542e9a92fSRobert Love */ 22642e9a92fSRobert Love static void fc_lport_ptp_setup(struct fc_lport *lport, 22742e9a92fSRobert Love u32 remote_fid, u64 remote_wwpn, 22842e9a92fSRobert Love u64 remote_wwnn) 22942e9a92fSRobert Love { 23048f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 2312f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 2323a3b42bfSRobert Love lport->tt.rport_logoff(lport->ptp_rdata); 2332f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 2342f2ac4a0SJoe Eykholt } 2353a3b42bfSRobert Love lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid); 2362f2ac4a0SJoe Eykholt kref_get(&lport->ptp_rdata->kref); 2373a3b42bfSRobert Love lport->ptp_rdata->ids.port_name = remote_wwpn; 2383a3b42bfSRobert Love lport->ptp_rdata->ids.node_name = remote_wwnn; 23948f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 24042e9a92fSRobert Love 2413a3b42bfSRobert Love lport->tt.rport_login(lport->ptp_rdata); 24242e9a92fSRobert Love 24342e9a92fSRobert Love fc_lport_enter_ready(lport); 24442e9a92fSRobert Love } 24542e9a92fSRobert Love 2463a3b42bfSRobert Love /** 2473a3b42bfSRobert Love * fc_get_host_port_state() - Return the port state of the given Scsi_Host 2483a3b42bfSRobert Love * @shost: The SCSI host whose port state is to be determined 2493a3b42bfSRobert Love */ 25042e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost) 25142e9a92fSRobert Love { 2523a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 25342e9a92fSRobert Love 2543a3b42bfSRobert Love mutex_lock(&lport->lp_mutex); 2553a3b42bfSRobert Love if (!lport->link_up) 2568faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 25742e9a92fSRobert Love else 2583a3b42bfSRobert Love switch (lport->state) { 2598faecddbSChris Leech case LPORT_ST_READY: 2608faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 2618faecddbSChris Leech break; 2628faecddbSChris Leech default: 26342e9a92fSRobert Love fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 26442e9a92fSRobert Love } 2653a3b42bfSRobert Love mutex_unlock(&lport->lp_mutex); 2668faecddbSChris Leech } 26742e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_state); 26842e9a92fSRobert Love 2693a3b42bfSRobert Love /** 2703a3b42bfSRobert Love * fc_get_host_speed() - Return the speed of the given Scsi_Host 2713a3b42bfSRobert Love * @shost: The SCSI host whose port speed is to be determined 2723a3b42bfSRobert Love */ 27342e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost) 27442e9a92fSRobert Love { 27542e9a92fSRobert Love struct fc_lport *lport = shost_priv(shost); 27642e9a92fSRobert Love 27742e9a92fSRobert Love fc_host_speed(shost) = lport->link_speed; 27842e9a92fSRobert Love } 27942e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_speed); 28042e9a92fSRobert Love 2813a3b42bfSRobert Love /** 2823a3b42bfSRobert Love * fc_get_host_stats() - Return the Scsi_Host's statistics 2833a3b42bfSRobert Love * @shost: The SCSI host whose statistics are to be returned 2843a3b42bfSRobert Love */ 28542e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) 28642e9a92fSRobert Love { 28742e9a92fSRobert Love struct fc_host_statistics *fcoe_stats; 2883a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 28942e9a92fSRobert Love struct timespec v0, v1; 290582b45bcSRobert Love unsigned int cpu; 29142e9a92fSRobert Love 2923a3b42bfSRobert Love fcoe_stats = &lport->host_stats; 29342e9a92fSRobert Love memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); 29442e9a92fSRobert Love 29542e9a92fSRobert Love jiffies_to_timespec(jiffies, &v0); 2963a3b42bfSRobert Love jiffies_to_timespec(lport->boot_time, &v1); 29742e9a92fSRobert Love fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); 29842e9a92fSRobert Love 299582b45bcSRobert Love for_each_possible_cpu(cpu) { 300582b45bcSRobert Love struct fcoe_dev_stats *stats; 301582b45bcSRobert Love 3023a3b42bfSRobert Love stats = per_cpu_ptr(lport->dev_stats, cpu); 303582b45bcSRobert Love 30442e9a92fSRobert Love fcoe_stats->tx_frames += stats->TxFrames; 30542e9a92fSRobert Love fcoe_stats->tx_words += stats->TxWords; 30642e9a92fSRobert Love fcoe_stats->rx_frames += stats->RxFrames; 30742e9a92fSRobert Love fcoe_stats->rx_words += stats->RxWords; 30842e9a92fSRobert Love fcoe_stats->error_frames += stats->ErrorFrames; 30942e9a92fSRobert Love fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; 31042e9a92fSRobert Love fcoe_stats->fcp_input_requests += stats->InputRequests; 31142e9a92fSRobert Love fcoe_stats->fcp_output_requests += stats->OutputRequests; 31242e9a92fSRobert Love fcoe_stats->fcp_control_requests += stats->ControlRequests; 31342e9a92fSRobert Love fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; 31442e9a92fSRobert Love fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; 31542e9a92fSRobert Love fcoe_stats->link_failure_count += stats->LinkFailureCount; 31642e9a92fSRobert Love } 31742e9a92fSRobert Love fcoe_stats->lip_count = -1; 31842e9a92fSRobert Love fcoe_stats->nos_count = -1; 31942e9a92fSRobert Love fcoe_stats->loss_of_sync_count = -1; 32042e9a92fSRobert Love fcoe_stats->loss_of_signal_count = -1; 32142e9a92fSRobert Love fcoe_stats->prim_seq_protocol_err_count = -1; 32242e9a92fSRobert Love fcoe_stats->dumped_frames = -1; 32342e9a92fSRobert Love return fcoe_stats; 32442e9a92fSRobert Love } 32542e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_stats); 32642e9a92fSRobert Love 3273a3b42bfSRobert Love /** 3283a3b42bfSRobert Love * fc_lport_flogi_fill() - Fill in FLOGI command for request 3293a3b42bfSRobert Love * @lport: The local port the FLOGI is for 3303a3b42bfSRobert Love * @flogi: The FLOGI command 3313a3b42bfSRobert Love * @op: The opcode 33242e9a92fSRobert Love */ 3333a3b42bfSRobert Love static void fc_lport_flogi_fill(struct fc_lport *lport, 3343a3b42bfSRobert Love struct fc_els_flogi *flogi, 33542e9a92fSRobert Love unsigned int op) 33642e9a92fSRobert Love { 33742e9a92fSRobert Love struct fc_els_csp *sp; 33842e9a92fSRobert Love struct fc_els_cssp *cp; 33942e9a92fSRobert Love 34042e9a92fSRobert Love memset(flogi, 0, sizeof(*flogi)); 34142e9a92fSRobert Love flogi->fl_cmd = (u8) op; 34242e9a92fSRobert Love put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); 34342e9a92fSRobert Love put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); 34442e9a92fSRobert Love sp = &flogi->fl_csp; 34542e9a92fSRobert Love sp->sp_hi_ver = 0x20; 34642e9a92fSRobert Love sp->sp_lo_ver = 0x20; 34742e9a92fSRobert Love sp->sp_bb_cred = htons(10); /* this gets set by gateway */ 34842e9a92fSRobert Love sp->sp_bb_data = htons((u16) lport->mfs); 34942e9a92fSRobert Love cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ 35042e9a92fSRobert Love cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); 35142e9a92fSRobert Love if (op != ELS_FLOGI) { 35242e9a92fSRobert Love sp->sp_features = htons(FC_SP_FT_CIRO); 35342e9a92fSRobert Love sp->sp_tot_seq = htons(255); /* seq. we accept */ 35442e9a92fSRobert Love sp->sp_rel_off = htons(0x1f); 35542e9a92fSRobert Love sp->sp_e_d_tov = htonl(lport->e_d_tov); 35642e9a92fSRobert Love 35742e9a92fSRobert Love cp->cp_rdfs = htons((u16) lport->mfs); 35842e9a92fSRobert Love cp->cp_con_seq = htons(255); 35942e9a92fSRobert Love cp->cp_open_seq = 1; 36042e9a92fSRobert Love } 36142e9a92fSRobert Love } 36242e9a92fSRobert Love 3633a3b42bfSRobert Love /** 3643a3b42bfSRobert Love * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port 3653a3b42bfSRobert Love * @lport: The local port to add a new FC-4 type to 3663a3b42bfSRobert Love * @type: The new FC-4 type 36742e9a92fSRobert Love */ 36842e9a92fSRobert Love static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) 36942e9a92fSRobert Love { 37042e9a92fSRobert Love __be32 *mp; 37142e9a92fSRobert Love 37242e9a92fSRobert Love mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; 37342e9a92fSRobert Love *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); 37442e9a92fSRobert Love } 37542e9a92fSRobert Love 37642e9a92fSRobert Love /** 37734f42a07SRobert Love * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. 37842e9a92fSRobert Love * @lport: Fibre Channel local port recieving the RLIR 37992261156SJoe Eykholt * @fp: The RLIR request frame 38042e9a92fSRobert Love * 3811b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 38242e9a92fSRobert Love * this function. 38342e9a92fSRobert Love */ 38492261156SJoe Eykholt static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp) 38542e9a92fSRobert Love { 3867414705eSRobert Love FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", 38742e9a92fSRobert Love fc_lport_state(lport)); 38842e9a92fSRobert Love 38992261156SJoe Eykholt lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); 39042e9a92fSRobert Love fc_frame_free(fp); 39142e9a92fSRobert Love } 39242e9a92fSRobert Love 39342e9a92fSRobert Love /** 39434f42a07SRobert Love * fc_lport_recv_echo_req() - Handle received ECHO request 3953a3b42bfSRobert Love * @lport: The local port recieving the ECHO 39692261156SJoe Eykholt * @fp: ECHO request frame 39742e9a92fSRobert Love * 3981b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 39942e9a92fSRobert Love * this function. 40042e9a92fSRobert Love */ 40192261156SJoe Eykholt static void fc_lport_recv_echo_req(struct fc_lport *lport, 40292261156SJoe Eykholt struct fc_frame *in_fp) 40342e9a92fSRobert Love { 40442e9a92fSRobert Love struct fc_frame *fp; 40542e9a92fSRobert Love unsigned int len; 40642e9a92fSRobert Love void *pp; 40742e9a92fSRobert Love void *dp; 40842e9a92fSRobert Love 4091b69bc06SJoe Eykholt FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", 41042e9a92fSRobert Love fc_lport_state(lport)); 41142e9a92fSRobert Love 41242e9a92fSRobert Love len = fr_len(in_fp) - sizeof(struct fc_frame_header); 41342e9a92fSRobert Love pp = fc_frame_payload_get(in_fp, len); 41442e9a92fSRobert Love 41542e9a92fSRobert Love if (len < sizeof(__be32)) 41642e9a92fSRobert Love len = sizeof(__be32); 41742e9a92fSRobert Love 41842e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 41942e9a92fSRobert Love if (fp) { 42042e9a92fSRobert Love dp = fc_frame_payload_get(fp, len); 42142e9a92fSRobert Love memcpy(dp, pp, len); 4221b69bc06SJoe Eykholt *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); 42324f089e2SJoe Eykholt fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); 42424f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 42542e9a92fSRobert Love } 42642e9a92fSRobert Love fc_frame_free(in_fp); 42742e9a92fSRobert Love } 42842e9a92fSRobert Love 42942e9a92fSRobert Love /** 4301b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 4311b69bc06SJoe Eykholt * @lport: The local port recieving the RNID 43292261156SJoe Eykholt * @fp: The RNID request frame 43342e9a92fSRobert Love * 4341b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 43542e9a92fSRobert Love * this function. 43642e9a92fSRobert Love */ 43792261156SJoe Eykholt static void fc_lport_recv_rnid_req(struct fc_lport *lport, 43892261156SJoe Eykholt struct fc_frame *in_fp) 43942e9a92fSRobert Love { 44042e9a92fSRobert Love struct fc_frame *fp; 44142e9a92fSRobert Love struct fc_els_rnid *req; 44242e9a92fSRobert Love struct { 44342e9a92fSRobert Love struct fc_els_rnid_resp rnid; 44442e9a92fSRobert Love struct fc_els_rnid_cid cid; 44542e9a92fSRobert Love struct fc_els_rnid_gen gen; 44642e9a92fSRobert Love } *rp; 44742e9a92fSRobert Love struct fc_seq_els_data rjt_data; 44842e9a92fSRobert Love u8 fmt; 44942e9a92fSRobert Love size_t len; 45042e9a92fSRobert Love 4517414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 45242e9a92fSRobert Love fc_lport_state(lport)); 45342e9a92fSRobert Love 45442e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 45542e9a92fSRobert Love if (!req) { 45642e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 45742e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 45892261156SJoe Eykholt lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); 45942e9a92fSRobert Love } else { 46042e9a92fSRobert Love fmt = req->rnid_fmt; 46142e9a92fSRobert Love len = sizeof(*rp); 46242e9a92fSRobert Love if (fmt != ELS_RNIDF_GEN || 46342e9a92fSRobert Love ntohl(lport->rnid_gen.rnid_atype) == 0) { 46442e9a92fSRobert Love fmt = ELS_RNIDF_NONE; /* nothing to provide */ 46542e9a92fSRobert Love len -= sizeof(rp->gen); 46642e9a92fSRobert Love } 46742e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 46842e9a92fSRobert Love if (fp) { 46942e9a92fSRobert Love rp = fc_frame_payload_get(fp, len); 47042e9a92fSRobert Love memset(rp, 0, len); 47142e9a92fSRobert Love rp->rnid.rnid_cmd = ELS_LS_ACC; 47242e9a92fSRobert Love rp->rnid.rnid_fmt = fmt; 47342e9a92fSRobert Love rp->rnid.rnid_cid_len = sizeof(rp->cid); 47442e9a92fSRobert Love rp->cid.rnid_wwpn = htonll(lport->wwpn); 47542e9a92fSRobert Love rp->cid.rnid_wwnn = htonll(lport->wwnn); 47642e9a92fSRobert Love if (fmt == ELS_RNIDF_GEN) { 47742e9a92fSRobert Love rp->rnid.rnid_sid_len = sizeof(rp->gen); 47842e9a92fSRobert Love memcpy(&rp->gen, &lport->rnid_gen, 47942e9a92fSRobert Love sizeof(rp->gen)); 48042e9a92fSRobert Love } 48124f089e2SJoe Eykholt fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); 48224f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 48342e9a92fSRobert Love } 48442e9a92fSRobert Love } 48542e9a92fSRobert Love fc_frame_free(in_fp); 48642e9a92fSRobert Love } 48742e9a92fSRobert Love 48842e9a92fSRobert Love /** 48934f42a07SRobert Love * fc_lport_recv_logo_req() - Handle received fabric LOGO request 4903a3b42bfSRobert Love * @lport: The local port recieving the LOGO 49192261156SJoe Eykholt * @fp: The LOGO request frame 49242e9a92fSRobert Love * 49342e9a92fSRobert Love * Locking Note: The lport lock is exected to be held before calling 49442e9a92fSRobert Love * this function. 49542e9a92fSRobert Love */ 49692261156SJoe Eykholt static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) 49742e9a92fSRobert Love { 49892261156SJoe Eykholt lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); 49942e9a92fSRobert Love fc_lport_enter_reset(lport); 50042e9a92fSRobert Love fc_frame_free(fp); 50142e9a92fSRobert Love } 50242e9a92fSRobert Love 50342e9a92fSRobert Love /** 50434f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 5053a3b42bfSRobert Love * @lport: The local port that should log into the fabric 50642e9a92fSRobert Love * 50742e9a92fSRobert Love * Locking Note: This function should not be called 50842e9a92fSRobert Love * with the lport lock held. 50942e9a92fSRobert Love */ 51042e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 51142e9a92fSRobert Love { 51242e9a92fSRobert Love int rc = -1; 51342e9a92fSRobert Love 51442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 51555a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || 51655a66d3cSVasu Dev lport->state == LPORT_ST_LOGO) { 51755a66d3cSVasu Dev fc_lport_state_enter(lport, LPORT_ST_RESET); 51842e9a92fSRobert Love fc_lport_enter_reset(lport); 51942e9a92fSRobert Love rc = 0; 52042e9a92fSRobert Love } 52142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 52242e9a92fSRobert Love 52342e9a92fSRobert Love return rc; 52442e9a92fSRobert Love } 52542e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 52642e9a92fSRobert Love 52742e9a92fSRobert Love /** 5288faecddbSChris Leech * __fc_linkup() - Handler for transport linkup events 5298faecddbSChris Leech * @lport: The lport whose link is up 5308faecddbSChris Leech * 5318faecddbSChris Leech * Locking: must be called with the lp_mutex held 5328faecddbSChris Leech */ 5338faecddbSChris Leech void __fc_linkup(struct fc_lport *lport) 5348faecddbSChris Leech { 5358faecddbSChris Leech if (!lport->link_up) { 5368faecddbSChris Leech lport->link_up = 1; 5378faecddbSChris Leech 5388faecddbSChris Leech if (lport->state == LPORT_ST_RESET) 5398faecddbSChris Leech fc_lport_enter_flogi(lport); 5408faecddbSChris Leech } 5418faecddbSChris Leech } 5428faecddbSChris Leech 5438faecddbSChris Leech /** 54434f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 5453a3b42bfSRobert Love * @lport: The local port whose link is up 54642e9a92fSRobert Love */ 54742e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 54842e9a92fSRobert Love { 549ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", 5507b2787ecSRobert Love lport->host->host_no, lport->port_id); 55142e9a92fSRobert Love 55242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5538faecddbSChris Leech __fc_linkup(lport); 55442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 55542e9a92fSRobert Love } 55642e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 55742e9a92fSRobert Love 55842e9a92fSRobert Love /** 5598faecddbSChris Leech * __fc_linkdown() - Handler for transport linkdown events 5608faecddbSChris Leech * @lport: The lport whose link is down 5618faecddbSChris Leech * 5628faecddbSChris Leech * Locking: must be called with the lp_mutex held 5638faecddbSChris Leech */ 5648faecddbSChris Leech void __fc_linkdown(struct fc_lport *lport) 5658faecddbSChris Leech { 5668faecddbSChris Leech if (lport->link_up) { 5678faecddbSChris Leech lport->link_up = 0; 5688faecddbSChris Leech fc_lport_enter_reset(lport); 5698faecddbSChris Leech lport->tt.fcp_cleanup(lport); 5708faecddbSChris Leech } 5718faecddbSChris Leech } 5728faecddbSChris Leech 5738faecddbSChris Leech /** 57434f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 5753a3b42bfSRobert Love * @lport: The local port whose link is down 57642e9a92fSRobert Love */ 57742e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 57842e9a92fSRobert Love { 579ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", 5807b2787ecSRobert Love lport->host->host_no, lport->port_id); 58142e9a92fSRobert Love 5828faecddbSChris Leech mutex_lock(&lport->lp_mutex); 5838faecddbSChris Leech __fc_linkdown(lport); 58442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 58542e9a92fSRobert Love } 58642e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 58742e9a92fSRobert Love 58842e9a92fSRobert Love /** 58934f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 5903a3b42bfSRobert Love * @lport: The local port to logoff the fabric 59142e9a92fSRobert Love * 59242e9a92fSRobert Love * Return value: 59342e9a92fSRobert Love * 0 for success, -1 for failure 59434f42a07SRobert Love */ 59542e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 59642e9a92fSRobert Love { 59742e9a92fSRobert Love lport->tt.disc_stop_final(lport); 59842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5993a3b42bfSRobert Love if (lport->dns_rdata) 6003a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 601a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 602a0fd2e49SAbhijeet Joglekar lport->tt.rport_flush_queue(); 603a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 60442e9a92fSRobert Love fc_lport_enter_logo(lport); 60542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 606f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 60742e9a92fSRobert Love return 0; 60842e9a92fSRobert Love } 60942e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 61042e9a92fSRobert Love 61142e9a92fSRobert Love /** 6123a3b42bfSRobert Love * fc_lport_destroy() - Unregister a fc_lport 6133a3b42bfSRobert Love * @lport: The local port to unregister 61442e9a92fSRobert Love * 61542e9a92fSRobert Love * Note: 61642e9a92fSRobert Love * exit routine for fc_lport instance 61742e9a92fSRobert Love * clean-up all the allocated memory 61842e9a92fSRobert Love * and free up other system resources. 61942e9a92fSRobert Love * 62034f42a07SRobert Love */ 62142e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 62242e9a92fSRobert Love { 623bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 624b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 625bbf15669SAbhijeet Joglekar lport->link_up = 0; 62642e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 627bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 628bbf15669SAbhijeet Joglekar 62942e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 630e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 6311f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 63242e9a92fSRobert Love return 0; 63342e9a92fSRobert Love } 63442e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 63542e9a92fSRobert Love 63642e9a92fSRobert Love /** 6373a3b42bfSRobert Love * fc_set_mfs() - Set the maximum frame size for a local port 6383a3b42bfSRobert Love * @lport: The local port to set the MFS for 6393a3b42bfSRobert Love * @mfs: The new MFS 64034f42a07SRobert Love */ 64142e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 64242e9a92fSRobert Love { 64342e9a92fSRobert Love unsigned int old_mfs; 64442e9a92fSRobert Love int rc = -EINVAL; 64542e9a92fSRobert Love 64642e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 64742e9a92fSRobert Love 64842e9a92fSRobert Love old_mfs = lport->mfs; 64942e9a92fSRobert Love 65042e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 65142e9a92fSRobert Love mfs &= ~3; 65242e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 65342e9a92fSRobert Love mfs = FC_MAX_FRAME; 65442e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 65542e9a92fSRobert Love lport->mfs = mfs; 65642e9a92fSRobert Love rc = 0; 65742e9a92fSRobert Love } 65842e9a92fSRobert Love 65942e9a92fSRobert Love if (!rc && mfs < old_mfs) 66042e9a92fSRobert Love fc_lport_enter_reset(lport); 66142e9a92fSRobert Love 66242e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 66342e9a92fSRobert Love 66442e9a92fSRobert Love return rc; 66542e9a92fSRobert Love } 66642e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 66742e9a92fSRobert Love 66842e9a92fSRobert Love /** 66934f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 6703a3b42bfSRobert Love * @lport: The local port receiving the event 67142e9a92fSRobert Love * @event: The discovery event 67242e9a92fSRobert Love */ 67342e9a92fSRobert Love void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) 67442e9a92fSRobert Love { 67542e9a92fSRobert Love switch (event) { 67642e9a92fSRobert Love case DISC_EV_SUCCESS: 6777414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 67842e9a92fSRobert Love break; 67942e9a92fSRobert Love case DISC_EV_FAILED: 680e6d8a1b0SJoe Eykholt printk(KERN_ERR "host%d: libfc: " 681ce8b5df0SChris Leech "Discovery failed for port (%6.6x)\n", 6827b2787ecSRobert Love lport->host->host_no, lport->port_id); 68342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 68442e9a92fSRobert Love fc_lport_enter_reset(lport); 68542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 68642e9a92fSRobert Love break; 68742e9a92fSRobert Love case DISC_EV_NONE: 68842e9a92fSRobert Love WARN_ON(1); 68942e9a92fSRobert Love break; 69042e9a92fSRobert Love } 69142e9a92fSRobert Love } 69242e9a92fSRobert Love 69342e9a92fSRobert Love /** 69434f42a07SRobert Love * fc_rport_enter_ready() - Enter the ready state and start discovery 6953a3b42bfSRobert Love * @lport: The local port that is ready 69642e9a92fSRobert Love * 69742e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 69842e9a92fSRobert Love * this routine. 69942e9a92fSRobert Love */ 70042e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 70142e9a92fSRobert Love { 7027414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 7037414705eSRobert Love fc_lport_state(lport)); 70442e9a92fSRobert Love 70542e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 7068faecddbSChris Leech if (lport->vport) 7078faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); 7088faecddbSChris Leech fc_vports_linkchange(lport); 70942e9a92fSRobert Love 7103a3b42bfSRobert Love if (!lport->ptp_rdata) 71142e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 71242e9a92fSRobert Love } 71342e9a92fSRobert Love 71442e9a92fSRobert Love /** 715093bb6a2SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID 716093bb6a2SJoe Eykholt * @lport: The local port which will have its Port ID set. 717093bb6a2SJoe Eykholt * @port_id: The new port ID. 718093bb6a2SJoe Eykholt * @fp: The frame containing the incoming request, or NULL. 719093bb6a2SJoe Eykholt * 720093bb6a2SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 721093bb6a2SJoe Eykholt * this function. 722093bb6a2SJoe Eykholt */ 723093bb6a2SJoe Eykholt static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, 724093bb6a2SJoe Eykholt struct fc_frame *fp) 725093bb6a2SJoe Eykholt { 726093bb6a2SJoe Eykholt if (port_id) 727ce8b5df0SChris Leech printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", 728093bb6a2SJoe Eykholt lport->host->host_no, port_id); 729093bb6a2SJoe Eykholt 7307b2787ecSRobert Love lport->port_id = port_id; 7317b2787ecSRobert Love 7327b2787ecSRobert Love /* Update the fc_host */ 733093bb6a2SJoe Eykholt fc_host_port_id(lport->host) = port_id; 7347b2787ecSRobert Love 735093bb6a2SJoe Eykholt if (lport->tt.lport_set_port_id) 736093bb6a2SJoe Eykholt lport->tt.lport_set_port_id(lport, port_id, fp); 737093bb6a2SJoe Eykholt } 738093bb6a2SJoe Eykholt 739093bb6a2SJoe Eykholt /** 7403726f358SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint 7413726f358SJoe Eykholt * @lport: The local port which will have its Port ID set. 7423726f358SJoe Eykholt * @port_id: The new port ID. 7433726f358SJoe Eykholt * 7443726f358SJoe Eykholt * Called by the lower-level driver when transport sets the local port_id. 7453726f358SJoe Eykholt * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and 7463726f358SJoe Eykholt * discovery to be skipped. 7473726f358SJoe Eykholt */ 7483726f358SJoe Eykholt void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id) 7493726f358SJoe Eykholt { 7503726f358SJoe Eykholt mutex_lock(&lport->lp_mutex); 7513726f358SJoe Eykholt 7523726f358SJoe Eykholt fc_lport_set_port_id(lport, port_id, NULL); 7533726f358SJoe Eykholt 7543726f358SJoe Eykholt switch (lport->state) { 7553726f358SJoe Eykholt case LPORT_ST_RESET: 7563726f358SJoe Eykholt case LPORT_ST_FLOGI: 7573726f358SJoe Eykholt if (port_id) 7583726f358SJoe Eykholt fc_lport_enter_ready(lport); 7593726f358SJoe Eykholt break; 7603726f358SJoe Eykholt default: 7613726f358SJoe Eykholt break; 7623726f358SJoe Eykholt } 7633726f358SJoe Eykholt mutex_unlock(&lport->lp_mutex); 7643726f358SJoe Eykholt } 7653726f358SJoe Eykholt EXPORT_SYMBOL(fc_lport_set_local_id); 7663726f358SJoe Eykholt 7673726f358SJoe Eykholt /** 76834f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 7693a3b42bfSRobert Love * @lport: The local port that recieved the request 77092261156SJoe Eykholt * @rx_fp: The FLOGI frame 77142e9a92fSRobert Love * 77242e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 77342e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 77442e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 77542e9a92fSRobert Love * 7761b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 77742e9a92fSRobert Love * this function. 77842e9a92fSRobert Love */ 77992261156SJoe Eykholt static void fc_lport_recv_flogi_req(struct fc_lport *lport, 78092261156SJoe Eykholt struct fc_frame *rx_fp) 78142e9a92fSRobert Love { 78242e9a92fSRobert Love struct fc_frame *fp; 78324f089e2SJoe Eykholt struct fc_frame_header *fh; 78442e9a92fSRobert Love struct fc_els_flogi *flp; 78542e9a92fSRobert Love struct fc_els_flogi *new_flp; 78642e9a92fSRobert Love u64 remote_wwpn; 78742e9a92fSRobert Love u32 remote_fid; 78842e9a92fSRobert Love u32 local_fid; 78942e9a92fSRobert Love 7907414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 79142e9a92fSRobert Love fc_lport_state(lport)); 79242e9a92fSRobert Love 793251748a9SJoe Eykholt remote_fid = fc_frame_sid(rx_fp); 79442e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 79542e9a92fSRobert Love if (!flp) 79642e9a92fSRobert Love goto out; 79742e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 79842e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 799e6d8a1b0SJoe Eykholt printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " 8009f8f3aa6SChris Leech "with same WWPN %16.16llx\n", 801e6d8a1b0SJoe Eykholt lport->host->host_no, remote_wwpn); 80242e9a92fSRobert Love goto out; 80342e9a92fSRobert Love } 8049f8f3aa6SChris Leech FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); 80542e9a92fSRobert Love 80642e9a92fSRobert Love /* 80742e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 80842e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 80942e9a92fSRobert Love * But if so, both of us could end up with the same FID. 81042e9a92fSRobert Love */ 81142e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 81242e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 81342e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 81442e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 81542e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 81642e9a92fSRobert Love } else if (!remote_fid) { 81742e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 81842e9a92fSRobert Love } 81942e9a92fSRobert Love 820093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, local_fid, rx_fp); 82142e9a92fSRobert Love 82242e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 82342e9a92fSRobert Love if (fp) { 82442e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 82542e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 82642e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 82742e9a92fSRobert Love 82842e9a92fSRobert Love /* 82942e9a92fSRobert Love * Send the response. If this fails, the originator should 83042e9a92fSRobert Love * repeat the sequence. 83142e9a92fSRobert Love */ 83224f089e2SJoe Eykholt fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); 83324f089e2SJoe Eykholt fh = fc_frame_header_get(fp); 83424f089e2SJoe Eykholt hton24(fh->fh_s_id, local_fid); 83524f089e2SJoe Eykholt hton24(fh->fh_d_id, remote_fid); 83624f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 83742e9a92fSRobert Love 83842e9a92fSRobert Love } else { 83942e9a92fSRobert Love fc_lport_error(lport, fp); 84042e9a92fSRobert Love } 84142e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 84242e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 84342e9a92fSRobert Love out: 84442e9a92fSRobert Love fc_frame_free(rx_fp); 84542e9a92fSRobert Love } 84642e9a92fSRobert Love 84742e9a92fSRobert Love /** 84834f42a07SRobert Love * fc_lport_recv_req() - The generic lport request handler 8493a3b42bfSRobert Love * @lport: The local port that received the request 8503a3b42bfSRobert Love * @fp: The request frame 85142e9a92fSRobert Love * 85242e9a92fSRobert Love * This function will see if the lport handles the request or 85342e9a92fSRobert Love * if an rport should handle the request. 85442e9a92fSRobert Love * 85542e9a92fSRobert Love * Locking Note: This function should not be called with the lport 85642e9a92fSRobert Love * lock held becuase it will grab the lock. 85742e9a92fSRobert Love */ 85892261156SJoe Eykholt static void fc_lport_recv_req(struct fc_lport *lport, struct fc_frame *fp) 85942e9a92fSRobert Love { 86042e9a92fSRobert Love struct fc_frame_header *fh = fc_frame_header_get(fp); 86192261156SJoe Eykholt void (*recv)(struct fc_lport *, struct fc_frame *); 86242e9a92fSRobert Love 86342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 86442e9a92fSRobert Love 86542e9a92fSRobert Love /* 86642e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 86742e9a92fSRobert Love * RSCN here. These don't require a session. 86842e9a92fSRobert Love * Even if we had a session, it might not be ready. 86942e9a92fSRobert Love */ 870e9ba8b42SJoe Eykholt if (!lport->link_up) 871e9ba8b42SJoe Eykholt fc_frame_free(fp); 872e9ba8b42SJoe Eykholt else if (fh->fh_type == FC_TYPE_ELS && 873e9ba8b42SJoe Eykholt fh->fh_r_ctl == FC_RCTL_ELS_REQ) { 87442e9a92fSRobert Love /* 87542e9a92fSRobert Love * Check opcode. 87642e9a92fSRobert Love */ 877131203a1SJoe Eykholt recv = lport->tt.rport_recv_req; 87842e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 87942e9a92fSRobert Love case ELS_FLOGI: 880a7b12a27SJoe Eykholt if (!lport->point_to_multipoint) 88142e9a92fSRobert Love recv = fc_lport_recv_flogi_req; 88242e9a92fSRobert Love break; 88342e9a92fSRobert Love case ELS_LOGO: 884251748a9SJoe Eykholt if (fc_frame_sid(fp) == FC_FID_FLOGI) 88542e9a92fSRobert Love recv = fc_lport_recv_logo_req; 88642e9a92fSRobert Love break; 88742e9a92fSRobert Love case ELS_RSCN: 88842e9a92fSRobert Love recv = lport->tt.disc_recv_req; 88942e9a92fSRobert Love break; 89042e9a92fSRobert Love case ELS_ECHO: 89142e9a92fSRobert Love recv = fc_lport_recv_echo_req; 89242e9a92fSRobert Love break; 89342e9a92fSRobert Love case ELS_RLIR: 89442e9a92fSRobert Love recv = fc_lport_recv_rlir_req; 89542e9a92fSRobert Love break; 89642e9a92fSRobert Love case ELS_RNID: 89742e9a92fSRobert Love recv = fc_lport_recv_rnid_req; 89842e9a92fSRobert Love break; 89942e9a92fSRobert Love } 90042e9a92fSRobert Love 90192261156SJoe Eykholt recv(lport, fp); 90242e9a92fSRobert Love } else { 9037414705eSRobert Love FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", 9047414705eSRobert Love fr_eof(fp)); 90542e9a92fSRobert Love fc_frame_free(fp); 90642e9a92fSRobert Love } 90742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 90842e9a92fSRobert Love } 90942e9a92fSRobert Love 91042e9a92fSRobert Love /** 9113a3b42bfSRobert Love * fc_lport_reset() - Reset a local port 9123a3b42bfSRobert Love * @lport: The local port which should be reset 91342e9a92fSRobert Love * 91442e9a92fSRobert Love * Locking Note: This functions should not be called with the 91542e9a92fSRobert Love * lport lock held. 91642e9a92fSRobert Love */ 91742e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 91842e9a92fSRobert Love { 919f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 92042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 92142e9a92fSRobert Love fc_lport_enter_reset(lport); 92242e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 92342e9a92fSRobert Love return 0; 92442e9a92fSRobert Love } 92542e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 92642e9a92fSRobert Love 92742e9a92fSRobert Love /** 9283a3b42bfSRobert Love * fc_lport_reset_locked() - Reset the local port w/ the lport lock held 9293a3b42bfSRobert Love * @lport: The local port to be reset 93042e9a92fSRobert Love * 93142e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 93242e9a92fSRobert Love * this routine. 93342e9a92fSRobert Love */ 9341190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 93542e9a92fSRobert Love { 9363a3b42bfSRobert Love if (lport->dns_rdata) 9373a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 93842e9a92fSRobert Love 9392f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 9402f2ac4a0SJoe Eykholt lport->tt.rport_logoff(lport->ptp_rdata); 9412f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 9423a3b42bfSRobert Love lport->ptp_rdata = NULL; 9432f2ac4a0SJoe Eykholt } 94442e9a92fSRobert Love 94542e9a92fSRobert Love lport->tt.disc_stop(lport); 94642e9a92fSRobert Love 9471f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 94842e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 949093bb6a2SJoe Eykholt 9503726f358SJoe Eykholt if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up)) 951093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, 0, NULL); 9521190d925SJoe Eykholt } 95342e9a92fSRobert Love 9541190d925SJoe Eykholt /** 9551190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 9563a3b42bfSRobert Love * @lport: The local port to be reset 9571190d925SJoe Eykholt * 9581190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9591190d925SJoe Eykholt * this routine. 9601190d925SJoe Eykholt */ 9611190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 9621190d925SJoe Eykholt { 9631190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 9641190d925SJoe Eykholt fc_lport_state(lport)); 9651190d925SJoe Eykholt 96655a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) 96755a66d3cSVasu Dev return; 96855a66d3cSVasu Dev 9698faecddbSChris Leech if (lport->vport) { 9708faecddbSChris Leech if (lport->link_up) 9718faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); 9728faecddbSChris Leech else 9738faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); 9748faecddbSChris Leech } 9751190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 9768faecddbSChris Leech fc_vports_linkchange(lport); 9771190d925SJoe Eykholt fc_lport_reset_locked(lport); 978bc0e17f6SVasu Dev if (lport->link_up) 97942e9a92fSRobert Love fc_lport_enter_flogi(lport); 98042e9a92fSRobert Love } 98142e9a92fSRobert Love 98242e9a92fSRobert Love /** 9833a3b42bfSRobert Love * fc_lport_enter_disabled() - Disable the local port 9843a3b42bfSRobert Love * @lport: The local port to be reset 9851190d925SJoe Eykholt * 9861190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9871190d925SJoe Eykholt * this routine. 9881190d925SJoe Eykholt */ 9891190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 9901190d925SJoe Eykholt { 9911190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 9921190d925SJoe Eykholt fc_lport_state(lport)); 9931190d925SJoe Eykholt 9941190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 9958faecddbSChris Leech fc_vports_linkchange(lport); 9961190d925SJoe Eykholt fc_lport_reset_locked(lport); 9971190d925SJoe Eykholt } 9981190d925SJoe Eykholt 9991190d925SJoe Eykholt /** 100034f42a07SRobert Love * fc_lport_error() - Handler for any errors 10013a3b42bfSRobert Love * @lport: The local port that the error was on 10023a3b42bfSRobert Love * @fp: The error code encoded in a frame pointer 100342e9a92fSRobert Love * 100442e9a92fSRobert Love * If the error was caused by a resource allocation failure 100542e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 100642e9a92fSRobert Love * after the e_d_tov time. 100742e9a92fSRobert Love */ 100842e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 100942e9a92fSRobert Love { 101042e9a92fSRobert Love unsigned long delay = 0; 10117414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 101242e9a92fSRobert Love PTR_ERR(fp), fc_lport_state(lport), 101342e9a92fSRobert Love lport->retry_count); 101442e9a92fSRobert Love 10157f985231SBhanu Prakash Gollapudi if (PTR_ERR(fp) == -FC_EX_CLOSED) 10167f985231SBhanu Prakash Gollapudi return; 10177f985231SBhanu Prakash Gollapudi 101842e9a92fSRobert Love /* 10197f985231SBhanu Prakash Gollapudi * Memory allocation failure, or the exchange timed out 10207f985231SBhanu Prakash Gollapudi * or we received LS_RJT. 102142e9a92fSRobert Love * Retry after delay 102242e9a92fSRobert Love */ 102342e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 102442e9a92fSRobert Love lport->retry_count++; 102542e9a92fSRobert Love if (!fp) 102642e9a92fSRobert Love delay = msecs_to_jiffies(500); 102742e9a92fSRobert Love else 102842e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 102942e9a92fSRobert Love 103042e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 10317f985231SBhanu Prakash Gollapudi } else 103242e9a92fSRobert Love fc_lport_enter_reset(lport); 103342e9a92fSRobert Love } 103442e9a92fSRobert Love 103542e9a92fSRobert Love /** 10367cccc157SChris Leech * fc_lport_ns_resp() - Handle response to a name server 10377cccc157SChris Leech * registration exchange 10387cccc157SChris Leech * @sp: current sequence in exchange 103942e9a92fSRobert Love * @fp: response frame 104042e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 104142e9a92fSRobert Love * 104242e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 10433a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 104442e9a92fSRobert Love * and then unlock the lport. 104542e9a92fSRobert Love */ 10467cccc157SChris Leech static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, 104742e9a92fSRobert Love void *lp_arg) 104842e9a92fSRobert Love { 104942e9a92fSRobert Love struct fc_lport *lport = lp_arg; 105042e9a92fSRobert Love struct fc_frame_header *fh; 105142e9a92fSRobert Love struct fc_ct_hdr *ct; 105242e9a92fSRobert Love 10537cccc157SChris Leech FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); 1054f657d299SJoe Eykholt 105542e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 105642e9a92fSRobert Love return; 105742e9a92fSRobert Love 105842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 105942e9a92fSRobert Love 1060ab593b18SJoe Eykholt if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { 10617cccc157SChris Leech FC_LPORT_DBG(lport, "Received a name server response, " 10627cccc157SChris Leech "but in state %s\n", fc_lport_state(lport)); 106376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 106476f6804eSAbhijeet Joglekar goto err; 106542e9a92fSRobert Love goto out; 106642e9a92fSRobert Love } 106742e9a92fSRobert Love 106876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 106976f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 107076f6804eSAbhijeet Joglekar goto err; 107176f6804eSAbhijeet Joglekar } 107276f6804eSAbhijeet Joglekar 107342e9a92fSRobert Love fh = fc_frame_header_get(fp); 107442e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 107542e9a92fSRobert Love 107642e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 107742e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 107842e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 107942e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 10807cccc157SChris Leech switch (lport->state) { 10817cccc157SChris Leech case LPORT_ST_RNN_ID: 1082c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); 10837cccc157SChris Leech break; 10847cccc157SChris Leech case LPORT_ST_RSNN_NN: 1085c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); 10867cccc157SChris Leech break; 10877cccc157SChris Leech case LPORT_ST_RSPN_ID: 1088c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 10897cccc157SChris Leech break; 10907cccc157SChris Leech case LPORT_ST_RFT_ID: 1091ab593b18SJoe Eykholt fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); 1092ab593b18SJoe Eykholt break; 1093ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 10947cccc157SChris Leech fc_lport_enter_scr(lport); 10957cccc157SChris Leech break; 10967cccc157SChris Leech default: 10977cccc157SChris Leech /* should have already been caught by state checks */ 10987cccc157SChris Leech break; 10997cccc157SChris Leech } 1100c9c7bd7aSChris Leech else 1101c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1102c9c7bd7aSChris Leech out: 1103c9c7bd7aSChris Leech fc_frame_free(fp); 1104c9c7bd7aSChris Leech err: 1105c9c7bd7aSChris Leech mutex_unlock(&lport->lp_mutex); 1106c9c7bd7aSChris Leech } 1107c9c7bd7aSChris Leech 1108c9c7bd7aSChris Leech /** 110934f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 111042e9a92fSRobert Love * @sp: current sequence in SCR exchange 111142e9a92fSRobert Love * @fp: response frame 111242e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 111342e9a92fSRobert Love * 111442e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 111542e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 111642e9a92fSRobert Love * and then unlock the lport. 111742e9a92fSRobert Love */ 111842e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 111942e9a92fSRobert Love void *lp_arg) 112042e9a92fSRobert Love { 112142e9a92fSRobert Love struct fc_lport *lport = lp_arg; 112242e9a92fSRobert Love u8 op; 112342e9a92fSRobert Love 1124f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1125f657d299SJoe Eykholt 112642e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 112742e9a92fSRobert Love return; 112842e9a92fSRobert Love 112942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 113042e9a92fSRobert Love 113142e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 11327414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 11337414705eSRobert Love "%s\n", fc_lport_state(lport)); 113476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 113576f6804eSAbhijeet Joglekar goto err; 113642e9a92fSRobert Love goto out; 113742e9a92fSRobert Love } 113842e9a92fSRobert Love 113976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 114076f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 114176f6804eSAbhijeet Joglekar goto err; 114276f6804eSAbhijeet Joglekar } 114376f6804eSAbhijeet Joglekar 114442e9a92fSRobert Love op = fc_frame_payload_op(fp); 114542e9a92fSRobert Love if (op == ELS_LS_ACC) 114642e9a92fSRobert Love fc_lport_enter_ready(lport); 114742e9a92fSRobert Love else 114842e9a92fSRobert Love fc_lport_error(lport, fp); 114942e9a92fSRobert Love 115042e9a92fSRobert Love out: 115142e9a92fSRobert Love fc_frame_free(fp); 115242e9a92fSRobert Love err: 115342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 115442e9a92fSRobert Love } 115542e9a92fSRobert Love 115642e9a92fSRobert Love /** 11573a3b42bfSRobert Love * fc_lport_enter_scr() - Send a SCR (State Change Register) request 11583a3b42bfSRobert Love * @lport: The local port to register for state changes 115942e9a92fSRobert Love * 116042e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 116142e9a92fSRobert Love * this routine. 116242e9a92fSRobert Love */ 116342e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 116442e9a92fSRobert Love { 116542e9a92fSRobert Love struct fc_frame *fp; 116642e9a92fSRobert Love 11677414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 11687414705eSRobert Love fc_lport_state(lport)); 116942e9a92fSRobert Love 117042e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 117142e9a92fSRobert Love 117242e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 117342e9a92fSRobert Love if (!fp) { 117442e9a92fSRobert Love fc_lport_error(lport, fp); 117542e9a92fSRobert Love return; 117642e9a92fSRobert Love } 117742e9a92fSRobert Love 1178a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 1179b94f8951SJoe Eykholt fc_lport_scr_resp, lport, 1180b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 11818f550f93SChris Leech fc_lport_error(lport, NULL); 118242e9a92fSRobert Love } 118342e9a92fSRobert Love 118442e9a92fSRobert Love /** 1185c914f7d1SChris Leech * fc_lport_enter_ns() - register some object with the name server 118642e9a92fSRobert Love * @lport: Fibre Channel local port to register 118742e9a92fSRobert Love * 118842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 118942e9a92fSRobert Love * this routine. 119042e9a92fSRobert Love */ 1191c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) 119242e9a92fSRobert Love { 119342e9a92fSRobert Love struct fc_frame *fp; 1194c914f7d1SChris Leech enum fc_ns_req cmd; 1195c914f7d1SChris Leech int size = sizeof(struct fc_ct_hdr); 1196c914f7d1SChris Leech size_t len; 119742e9a92fSRobert Love 1198c914f7d1SChris Leech FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1199c914f7d1SChris Leech fc_lport_state_names[state], 12007414705eSRobert Love fc_lport_state(lport)); 120142e9a92fSRobert Love 1202c914f7d1SChris Leech fc_lport_state_enter(lport, state); 120342e9a92fSRobert Love 1204c914f7d1SChris Leech switch (state) { 1205c914f7d1SChris Leech case LPORT_ST_RNN_ID: 1206c914f7d1SChris Leech cmd = FC_NS_RNN_ID; 1207c914f7d1SChris Leech size += sizeof(struct fc_ns_rn_id); 120842e9a92fSRobert Love break; 1209c914f7d1SChris Leech case LPORT_ST_RSNN_NN: 1210c9866a54SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1211c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1212c914f7d1SChris Leech if (!len) 1213c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1214c914f7d1SChris Leech cmd = FC_NS_RSNN_NN; 1215c914f7d1SChris Leech size += sizeof(struct fc_ns_rsnn) + len; 1216c914f7d1SChris Leech break; 1217c914f7d1SChris Leech case LPORT_ST_RSPN_ID: 12185baa17c3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1219c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1220c914f7d1SChris Leech if (!len) 1221c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1222c914f7d1SChris Leech cmd = FC_NS_RSPN_ID; 1223c914f7d1SChris Leech size += sizeof(struct fc_ns_rspn) + len; 1224c914f7d1SChris Leech break; 1225c914f7d1SChris Leech case LPORT_ST_RFT_ID: 1226c914f7d1SChris Leech cmd = FC_NS_RFT_ID; 1227c914f7d1SChris Leech size += sizeof(struct fc_ns_rft); 1228c914f7d1SChris Leech break; 1229ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1230ab593b18SJoe Eykholt cmd = FC_NS_RFF_ID; 1231ab593b18SJoe Eykholt size += sizeof(struct fc_ns_rff_id); 1232ab593b18SJoe Eykholt break; 1233c914f7d1SChris Leech default: 1234c914f7d1SChris Leech fc_lport_error(lport, NULL); 1235c914f7d1SChris Leech return; 1236c914f7d1SChris Leech } 1237c914f7d1SChris Leech 1238c914f7d1SChris Leech fp = fc_frame_alloc(lport, size); 12395baa17c3SChris Leech if (!fp) { 12405baa17c3SChris Leech fc_lport_error(lport, fp); 12415baa17c3SChris Leech return; 12425baa17c3SChris Leech } 12435baa17c3SChris Leech 1244c914f7d1SChris Leech if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, 12457cccc157SChris Leech fc_lport_ns_resp, 1246b94f8951SJoe Eykholt lport, 3 * lport->r_a_tov)) 1247c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1248c9c7bd7aSChris Leech } 1249c9c7bd7aSChris Leech 125042e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 125142e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 125242e9a92fSRobert Love }; 125342e9a92fSRobert Love 125442e9a92fSRobert Love /** 12553a3b42bfSRobert Love * fc_rport_enter_dns() - Create a fc_rport for the name server 12563a3b42bfSRobert Love * @lport: The local port requesting a remote port for the name server 125742e9a92fSRobert Love * 125842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 125942e9a92fSRobert Love * this routine. 126042e9a92fSRobert Love */ 126142e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 126242e9a92fSRobert Love { 1263ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 126442e9a92fSRobert Love 12657414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 12667414705eSRobert Love fc_lport_state(lport)); 126742e9a92fSRobert Love 126842e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 126942e9a92fSRobert Love 127048f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 12719737e6a7SRobert Love rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); 127248f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 12739fb9d328SJoe Eykholt if (!rdata) 127442e9a92fSRobert Love goto err; 127542e9a92fSRobert Love 127642e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 12779fb9d328SJoe Eykholt lport->tt.rport_login(rdata); 127842e9a92fSRobert Love return; 127942e9a92fSRobert Love 128042e9a92fSRobert Love err: 128142e9a92fSRobert Love fc_lport_error(lport, NULL); 128242e9a92fSRobert Love } 128342e9a92fSRobert Love 128442e9a92fSRobert Love /** 12853a3b42bfSRobert Love * fc_lport_timeout() - Handler for the retry_work timer 12863a3b42bfSRobert Love * @work: The work struct of the local port 128742e9a92fSRobert Love */ 128842e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 128942e9a92fSRobert Love { 129042e9a92fSRobert Love struct fc_lport *lport = 129142e9a92fSRobert Love container_of(work, struct fc_lport, 129242e9a92fSRobert Love retry_work.work); 129342e9a92fSRobert Love 129442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 129542e9a92fSRobert Love 129642e9a92fSRobert Love switch (lport->state) { 1297b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 129842e9a92fSRobert Love WARN_ON(1); 129942e9a92fSRobert Love break; 130022655ac2SJoe Eykholt case LPORT_ST_READY: 130122655ac2SJoe Eykholt WARN_ON(1); 130222655ac2SJoe Eykholt break; 130322655ac2SJoe Eykholt case LPORT_ST_RESET: 130422655ac2SJoe Eykholt break; 130542e9a92fSRobert Love case LPORT_ST_FLOGI: 130642e9a92fSRobert Love fc_lport_enter_flogi(lport); 130742e9a92fSRobert Love break; 130842e9a92fSRobert Love case LPORT_ST_DNS: 130942e9a92fSRobert Love fc_lport_enter_dns(lport); 131042e9a92fSRobert Love break; 1311c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 13125baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1313c9866a54SChris Leech case LPORT_ST_RSPN_ID: 131442e9a92fSRobert Love case LPORT_ST_RFT_ID: 1315ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1316c914f7d1SChris Leech fc_lport_enter_ns(lport, lport->state); 131742e9a92fSRobert Love break; 131842e9a92fSRobert Love case LPORT_ST_SCR: 131942e9a92fSRobert Love fc_lport_enter_scr(lport); 132042e9a92fSRobert Love break; 132142e9a92fSRobert Love case LPORT_ST_LOGO: 132242e9a92fSRobert Love fc_lport_enter_logo(lport); 132342e9a92fSRobert Love break; 132442e9a92fSRobert Love } 132542e9a92fSRobert Love 132642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 132742e9a92fSRobert Love } 132842e9a92fSRobert Love 132942e9a92fSRobert Love /** 133034f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 13313a3b42bfSRobert Love * @sp: The sequence that the LOGO was on 13323a3b42bfSRobert Love * @fp: The LOGO frame 13333a3b42bfSRobert Love * @lp_arg: The lport port that received the LOGO request 133442e9a92fSRobert Love * 133542e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 13363a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 133742e9a92fSRobert Love * and then unlock the lport. 133842e9a92fSRobert Love */ 133911b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 134042e9a92fSRobert Love void *lp_arg) 134142e9a92fSRobert Love { 134242e9a92fSRobert Love struct fc_lport *lport = lp_arg; 134342e9a92fSRobert Love u8 op; 134442e9a92fSRobert Love 1345f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1346f657d299SJoe Eykholt 134742e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 134842e9a92fSRobert Love return; 134942e9a92fSRobert Love 135042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 135142e9a92fSRobert Love 135242e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 13537414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 13547414705eSRobert Love "%s\n", fc_lport_state(lport)); 135576f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 135676f6804eSAbhijeet Joglekar goto err; 135742e9a92fSRobert Love goto out; 135842e9a92fSRobert Love } 135942e9a92fSRobert Love 136076f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 136176f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 136276f6804eSAbhijeet Joglekar goto err; 136376f6804eSAbhijeet Joglekar } 136476f6804eSAbhijeet Joglekar 136542e9a92fSRobert Love op = fc_frame_payload_op(fp); 136642e9a92fSRobert Love if (op == ELS_LS_ACC) 13671190d925SJoe Eykholt fc_lport_enter_disabled(lport); 136842e9a92fSRobert Love else 136942e9a92fSRobert Love fc_lport_error(lport, fp); 137042e9a92fSRobert Love 137142e9a92fSRobert Love out: 137242e9a92fSRobert Love fc_frame_free(fp); 137342e9a92fSRobert Love err: 137442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 137542e9a92fSRobert Love } 137611b56188SChris Leech EXPORT_SYMBOL(fc_lport_logo_resp); 137742e9a92fSRobert Love 137842e9a92fSRobert Love /** 137934f42a07SRobert Love * fc_rport_enter_logo() - Logout of the fabric 13803a3b42bfSRobert Love * @lport: The local port to be logged out 138142e9a92fSRobert Love * 138242e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 138342e9a92fSRobert Love * this routine. 138442e9a92fSRobert Love */ 138542e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 138642e9a92fSRobert Love { 138742e9a92fSRobert Love struct fc_frame *fp; 138842e9a92fSRobert Love struct fc_els_logo *logo; 138942e9a92fSRobert Love 13907414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 13917414705eSRobert Love fc_lport_state(lport)); 139242e9a92fSRobert Love 139342e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 13948faecddbSChris Leech fc_vports_linkchange(lport); 139542e9a92fSRobert Love 139642e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 139742e9a92fSRobert Love if (!fp) { 139842e9a92fSRobert Love fc_lport_error(lport, fp); 139942e9a92fSRobert Love return; 140042e9a92fSRobert Love } 140142e9a92fSRobert Love 1402a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1403b94f8951SJoe Eykholt fc_lport_logo_resp, lport, 1404b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 14058f550f93SChris Leech fc_lport_error(lport, NULL); 140642e9a92fSRobert Love } 140742e9a92fSRobert Love 140842e9a92fSRobert Love /** 140934f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 14103a3b42bfSRobert Love * @sp: The sequence that the FLOGI was on 14113a3b42bfSRobert Love * @fp: The FLOGI response frame 14123a3b42bfSRobert Love * @lp_arg: The lport port that received the FLOGI response 141342e9a92fSRobert Love * 141442e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 14153a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 141642e9a92fSRobert Love * and then unlock the lport. 141742e9a92fSRobert Love */ 141811b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 141942e9a92fSRobert Love void *lp_arg) 142042e9a92fSRobert Love { 142142e9a92fSRobert Love struct fc_lport *lport = lp_arg; 142242e9a92fSRobert Love struct fc_els_flogi *flp; 142342e9a92fSRobert Love u32 did; 142442e9a92fSRobert Love u16 csp_flags; 142542e9a92fSRobert Love unsigned int r_a_tov; 142642e9a92fSRobert Love unsigned int e_d_tov; 142742e9a92fSRobert Love u16 mfs; 142842e9a92fSRobert Love 1429f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1430f657d299SJoe Eykholt 143142e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 143242e9a92fSRobert Love return; 143342e9a92fSRobert Love 143442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 143542e9a92fSRobert Love 143642e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 14377414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 14387414705eSRobert Love "%s\n", fc_lport_state(lport)); 143976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 144076f6804eSAbhijeet Joglekar goto err; 144142e9a92fSRobert Love goto out; 144242e9a92fSRobert Love } 144342e9a92fSRobert Love 144476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 144576f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 144676f6804eSAbhijeet Joglekar goto err; 144776f6804eSAbhijeet Joglekar } 144876f6804eSAbhijeet Joglekar 1449251748a9SJoe Eykholt did = fc_frame_did(fp); 14507f985231SBhanu Prakash Gollapudi 14517f985231SBhanu Prakash Gollapudi if (!did) { 14527f985231SBhanu Prakash Gollapudi FC_LPORT_DBG(lport, "Bad FLOGI response\n"); 14537f985231SBhanu Prakash Gollapudi goto out; 14547f985231SBhanu Prakash Gollapudi } 14557f985231SBhanu Prakash Gollapudi 14567f985231SBhanu Prakash Gollapudi if (fc_frame_payload_op(fp) == ELS_LS_ACC) { 145742e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 145842e9a92fSRobert Love if (flp) { 145942e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 146042e9a92fSRobert Love FC_SP_BB_DATA_MASK; 146142e9a92fSRobert Love if (mfs >= FC_SP_MIN_MAX_PAYLOAD && 146242e9a92fSRobert Love mfs < lport->mfs) 146342e9a92fSRobert Love lport->mfs = mfs; 146442e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 146542e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 146642e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 146742e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 146842e9a92fSRobert Love e_d_tov /= 1000000; 1469db36c06cSChris Leech 1470db36c06cSChris Leech lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); 1471db36c06cSChris Leech 147242e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 147342e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 147442e9a92fSRobert Love lport->e_d_tov = e_d_tov; 147542e9a92fSRobert Love lport->r_a_tov = 2 * e_d_tov; 1476093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 1477e6d8a1b0SJoe Eykholt printk(KERN_INFO "host%d: libfc: " 1478ce8b5df0SChris Leech "Port (%6.6x) entered " 1479e6d8a1b0SJoe Eykholt "point-to-point mode\n", 1480e6d8a1b0SJoe Eykholt lport->host->host_no, did); 1481251748a9SJoe Eykholt fc_lport_ptp_setup(lport, fc_frame_sid(fp), 148242e9a92fSRobert Love get_unaligned_be64( 148342e9a92fSRobert Love &flp->fl_wwpn), 148442e9a92fSRobert Love get_unaligned_be64( 148542e9a92fSRobert Love &flp->fl_wwnn)); 148642e9a92fSRobert Love } else { 148742e9a92fSRobert Love lport->e_d_tov = e_d_tov; 148842e9a92fSRobert Love lport->r_a_tov = r_a_tov; 148942e9a92fSRobert Love fc_host_fabric_name(lport->host) = 149042e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 1491093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 149242e9a92fSRobert Love fc_lport_enter_dns(lport); 149342e9a92fSRobert Love } 149442e9a92fSRobert Love } 14957f985231SBhanu Prakash Gollapudi } else 14967f985231SBhanu Prakash Gollapudi fc_lport_error(lport, fp); 149742e9a92fSRobert Love 149842e9a92fSRobert Love out: 149942e9a92fSRobert Love fc_frame_free(fp); 150042e9a92fSRobert Love err: 150142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 150242e9a92fSRobert Love } 150311b56188SChris Leech EXPORT_SYMBOL(fc_lport_flogi_resp); 150442e9a92fSRobert Love 150542e9a92fSRobert Love /** 150634f42a07SRobert Love * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager 150742e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 150842e9a92fSRobert Love * 150942e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 151042e9a92fSRobert Love * this routine. 151142e9a92fSRobert Love */ 151242e9a92fSRobert Love void fc_lport_enter_flogi(struct fc_lport *lport) 151342e9a92fSRobert Love { 151442e9a92fSRobert Love struct fc_frame *fp; 151542e9a92fSRobert Love 15167414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 15177414705eSRobert Love fc_lport_state(lport)); 151842e9a92fSRobert Love 151942e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 152042e9a92fSRobert Love 15213726f358SJoe Eykholt if (lport->point_to_multipoint) { 15223726f358SJoe Eykholt if (lport->port_id) 15233726f358SJoe Eykholt fc_lport_enter_ready(lport); 15243726f358SJoe Eykholt return; 15253726f358SJoe Eykholt } 15263726f358SJoe Eykholt 152742e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 152842e9a92fSRobert Love if (!fp) 152942e9a92fSRobert Love return fc_lport_error(lport, fp); 153042e9a92fSRobert Love 1531db36c06cSChris Leech if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, 1532db36c06cSChris Leech lport->vport ? ELS_FDISC : ELS_FLOGI, 1533b94f8951SJoe Eykholt fc_lport_flogi_resp, lport, 1534b94f8951SJoe Eykholt lport->vport ? 2 * lport->r_a_tov : 1535b94f8951SJoe Eykholt lport->e_d_tov)) 15368f550f93SChris Leech fc_lport_error(lport, NULL); 153742e9a92fSRobert Love } 153842e9a92fSRobert Love 15393a3b42bfSRobert Love /** 15403a3b42bfSRobert Love * fc_lport_config() - Configure a fc_lport 15413a3b42bfSRobert Love * @lport: The local port to be configured 15423a3b42bfSRobert Love */ 154342e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 154442e9a92fSRobert Love { 154542e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 154642e9a92fSRobert Love mutex_init(&lport->lp_mutex); 154742e9a92fSRobert Love 1548b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 154942e9a92fSRobert Love 155042e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 155142e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 155242e9a92fSRobert Love 155342e9a92fSRobert Love return 0; 155442e9a92fSRobert Love } 155542e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 155642e9a92fSRobert Love 15573a3b42bfSRobert Love /** 15583a3b42bfSRobert Love * fc_lport_init() - Initialize the lport layer for a local port 15593a3b42bfSRobert Love * @lport: The local port to initialize the exchange layer for 15603a3b42bfSRobert Love */ 156142e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 156242e9a92fSRobert Love { 156342e9a92fSRobert Love if (!lport->tt.lport_recv) 156442e9a92fSRobert Love lport->tt.lport_recv = fc_lport_recv_req; 156542e9a92fSRobert Love 156642e9a92fSRobert Love if (!lport->tt.lport_reset) 156742e9a92fSRobert Love lport->tt.lport_reset = fc_lport_reset; 156842e9a92fSRobert Love 156942e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 157042e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 157142e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 157242e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 157342e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 157442e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 157542e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 157642e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 157742e9a92fSRobert Love 157842e9a92fSRobert Love /* This value is also unchanging */ 157942e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 158042e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 158142e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 158242e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 158342e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 158442e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 158542e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 158642e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 158742e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 158842e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 158942e9a92fSRobert Love 159042e9a92fSRobert Love return 0; 159142e9a92fSRobert Love } 159242e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1593a51ab396SSteve Ma 1594a51ab396SSteve Ma /** 15953a3b42bfSRobert Love * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests 15963a3b42bfSRobert Love * @sp: The sequence for the FC Passthrough response 15973a3b42bfSRobert Love * @fp: The response frame 15983a3b42bfSRobert Love * @info_arg: The BSG info that the response is for 1599a51ab396SSteve Ma */ 1600a51ab396SSteve Ma static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, 1601a51ab396SSteve Ma void *info_arg) 1602a51ab396SSteve Ma { 1603a51ab396SSteve Ma struct fc_bsg_info *info = info_arg; 1604a51ab396SSteve Ma struct fc_bsg_job *job = info->job; 1605a51ab396SSteve Ma struct fc_lport *lport = info->lport; 1606a51ab396SSteve Ma struct fc_frame_header *fh; 1607a51ab396SSteve Ma size_t len; 1608a51ab396SSteve Ma void *buf; 1609a51ab396SSteve Ma 1610a51ab396SSteve Ma if (IS_ERR(fp)) { 1611a51ab396SSteve Ma job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? 1612a51ab396SSteve Ma -ECONNABORTED : -ETIMEDOUT; 1613a51ab396SSteve Ma job->reply_len = sizeof(uint32_t); 1614a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1615a51ab396SSteve Ma job->job_done(job); 1616a51ab396SSteve Ma kfree(info); 1617a51ab396SSteve Ma return; 1618a51ab396SSteve Ma } 1619a51ab396SSteve Ma 1620a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1621a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1622a51ab396SSteve Ma len = fr_len(fp) - sizeof(*fh); 1623a51ab396SSteve Ma buf = fc_frame_payload_get(fp, 0); 1624a51ab396SSteve Ma 1625a51ab396SSteve Ma if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { 1626a51ab396SSteve Ma /* Get the response code from the first frame payload */ 1627a51ab396SSteve Ma unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? 1628a51ab396SSteve Ma ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : 1629a51ab396SSteve Ma (unsigned short)fc_frame_payload_op(fp); 1630a51ab396SSteve Ma 1631a51ab396SSteve Ma /* Save the reply status of the job */ 1632a51ab396SSteve Ma job->reply->reply_data.ctels_reply.status = 1633a51ab396SSteve Ma (cmd == info->rsp_code) ? 1634a51ab396SSteve Ma FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; 1635a51ab396SSteve Ma } 1636a51ab396SSteve Ma 1637a51ab396SSteve Ma job->reply->reply_payload_rcv_len += 1638a51ab396SSteve Ma fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, 1639a51ab396SSteve Ma &info->offset, KM_BIO_SRC_IRQ, NULL); 1640a51ab396SSteve Ma 1641a51ab396SSteve Ma if (fr_eof(fp) == FC_EOF_T && 1642a51ab396SSteve Ma (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == 1643a51ab396SSteve Ma (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { 1644a51ab396SSteve Ma if (job->reply->reply_payload_rcv_len > 1645a51ab396SSteve Ma job->reply_payload.payload_len) 1646a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 1647a51ab396SSteve Ma job->reply_payload.payload_len; 1648a51ab396SSteve Ma job->reply->result = 0; 1649a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1650a51ab396SSteve Ma job->job_done(job); 1651a51ab396SSteve Ma kfree(info); 1652a51ab396SSteve Ma } 1653a51ab396SSteve Ma fc_frame_free(fp); 1654a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1655a51ab396SSteve Ma } 1656a51ab396SSteve Ma 1657a51ab396SSteve Ma /** 16583a3b42bfSRobert Love * fc_lport_els_request() - Send ELS passthrough request 16593a3b42bfSRobert Love * @job: The BSG Passthrough job 1660a51ab396SSteve Ma * @lport: The local port sending the request 16613a3b42bfSRobert Love * @did: The destination port id 1662a51ab396SSteve Ma * 1663a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1664a51ab396SSteve Ma * this routine. 1665a51ab396SSteve Ma */ 1666a51ab396SSteve Ma static int fc_lport_els_request(struct fc_bsg_job *job, 1667a51ab396SSteve Ma struct fc_lport *lport, 1668a51ab396SSteve Ma u32 did, u32 tov) 1669a51ab396SSteve Ma { 1670a51ab396SSteve Ma struct fc_bsg_info *info; 1671a51ab396SSteve Ma struct fc_frame *fp; 1672a51ab396SSteve Ma struct fc_frame_header *fh; 1673a51ab396SSteve Ma char *pp; 1674a51ab396SSteve Ma int len; 1675a51ab396SSteve Ma 167670d919fbSYi Zou fp = fc_frame_alloc(lport, job->request_payload.payload_len); 1677a51ab396SSteve Ma if (!fp) 1678a51ab396SSteve Ma return -ENOMEM; 1679a51ab396SSteve Ma 1680a51ab396SSteve Ma len = job->request_payload.payload_len; 1681a51ab396SSteve Ma pp = fc_frame_payload_get(fp, len); 1682a51ab396SSteve Ma 1683a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1684a51ab396SSteve Ma job->request_payload.sg_cnt, 1685a51ab396SSteve Ma pp, len); 1686a51ab396SSteve Ma 1687a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1688a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_ELS_REQ; 1689a51ab396SSteve Ma hton24(fh->fh_d_id, did); 16907b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1691a51ab396SSteve Ma fh->fh_type = FC_TYPE_ELS; 169224f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 1693a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1694a51ab396SSteve Ma fh->fh_df_ctl = 0; 1695a51ab396SSteve Ma fh->fh_parm_offset = 0; 1696a51ab396SSteve Ma 1697a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1698a51ab396SSteve Ma if (!info) { 1699a51ab396SSteve Ma fc_frame_free(fp); 1700a51ab396SSteve Ma return -ENOMEM; 1701a51ab396SSteve Ma } 1702a51ab396SSteve Ma 1703a51ab396SSteve Ma info->job = job; 1704a51ab396SSteve Ma info->lport = lport; 1705a51ab396SSteve Ma info->rsp_code = ELS_LS_ACC; 1706a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1707a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1708a51ab396SSteve Ma 1709a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1710a51ab396SSteve Ma NULL, info, tov)) 1711a51ab396SSteve Ma return -ECOMM; 1712a51ab396SSteve Ma return 0; 1713a51ab396SSteve Ma } 1714a51ab396SSteve Ma 1715a51ab396SSteve Ma /** 17163a3b42bfSRobert Love * fc_lport_ct_request() - Send CT Passthrough request 17173a3b42bfSRobert Love * @job: The BSG Passthrough job 1718a51ab396SSteve Ma * @lport: The local port sending the request 1719a51ab396SSteve Ma * @did: The destination FC-ID 17203a3b42bfSRobert Love * @tov: The timeout period to wait for the response 1721a51ab396SSteve Ma * 1722a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1723a51ab396SSteve Ma * this routine. 1724a51ab396SSteve Ma */ 1725a51ab396SSteve Ma static int fc_lport_ct_request(struct fc_bsg_job *job, 1726a51ab396SSteve Ma struct fc_lport *lport, u32 did, u32 tov) 1727a51ab396SSteve Ma { 1728a51ab396SSteve Ma struct fc_bsg_info *info; 1729a51ab396SSteve Ma struct fc_frame *fp; 1730a51ab396SSteve Ma struct fc_frame_header *fh; 1731a51ab396SSteve Ma struct fc_ct_req *ct; 1732a51ab396SSteve Ma size_t len; 1733a51ab396SSteve Ma 1734a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 1735a51ab396SSteve Ma job->request_payload.payload_len); 1736a51ab396SSteve Ma if (!fp) 1737a51ab396SSteve Ma return -ENOMEM; 1738a51ab396SSteve Ma 1739a51ab396SSteve Ma len = job->request_payload.payload_len; 1740a51ab396SSteve Ma ct = fc_frame_payload_get(fp, len); 1741a51ab396SSteve Ma 1742a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1743a51ab396SSteve Ma job->request_payload.sg_cnt, 1744a51ab396SSteve Ma ct, len); 1745a51ab396SSteve Ma 1746a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1747a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; 1748a51ab396SSteve Ma hton24(fh->fh_d_id, did); 17497b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1750a51ab396SSteve Ma fh->fh_type = FC_TYPE_CT; 175124f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 1752a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1753a51ab396SSteve Ma fh->fh_df_ctl = 0; 1754a51ab396SSteve Ma fh->fh_parm_offset = 0; 1755a51ab396SSteve Ma 1756a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1757a51ab396SSteve Ma if (!info) { 1758a51ab396SSteve Ma fc_frame_free(fp); 1759a51ab396SSteve Ma return -ENOMEM; 1760a51ab396SSteve Ma } 1761a51ab396SSteve Ma 1762a51ab396SSteve Ma info->job = job; 1763a51ab396SSteve Ma info->lport = lport; 1764a51ab396SSteve Ma info->rsp_code = FC_FS_ACC; 1765a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1766a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1767a51ab396SSteve Ma 1768a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1769a51ab396SSteve Ma NULL, info, tov)) 1770a51ab396SSteve Ma return -ECOMM; 1771a51ab396SSteve Ma return 0; 1772a51ab396SSteve Ma } 1773a51ab396SSteve Ma 1774a51ab396SSteve Ma /** 1775a51ab396SSteve Ma * fc_lport_bsg_request() - The common entry point for sending 17763a3b42bfSRobert Love * FC Passthrough requests 17773a3b42bfSRobert Love * @job: The BSG passthrough job 1778a51ab396SSteve Ma */ 1779a51ab396SSteve Ma int fc_lport_bsg_request(struct fc_bsg_job *job) 1780a51ab396SSteve Ma { 1781a51ab396SSteve Ma struct request *rsp = job->req->next_rq; 1782a51ab396SSteve Ma struct Scsi_Host *shost = job->shost; 1783a51ab396SSteve Ma struct fc_lport *lport = shost_priv(shost); 1784a51ab396SSteve Ma struct fc_rport *rport; 1785a51ab396SSteve Ma struct fc_rport_priv *rdata; 1786a51ab396SSteve Ma int rc = -EINVAL; 1787a51ab396SSteve Ma u32 did; 1788a51ab396SSteve Ma 1789a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 0; 1790b248df30SHugh Daschbach if (rsp) 1791a51ab396SSteve Ma rsp->resid_len = job->reply_payload.payload_len; 1792a51ab396SSteve Ma 1793a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1794a51ab396SSteve Ma 1795a51ab396SSteve Ma switch (job->request->msgcode) { 1796a51ab396SSteve Ma case FC_BSG_RPT_ELS: 1797a51ab396SSteve Ma rport = job->rport; 1798a51ab396SSteve Ma if (!rport) 1799a51ab396SSteve Ma break; 1800a51ab396SSteve Ma 1801a51ab396SSteve Ma rdata = rport->dd_data; 1802a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, rport->port_id, 1803a51ab396SSteve Ma rdata->e_d_tov); 1804a51ab396SSteve Ma break; 1805a51ab396SSteve Ma 1806a51ab396SSteve Ma case FC_BSG_RPT_CT: 1807a51ab396SSteve Ma rport = job->rport; 1808a51ab396SSteve Ma if (!rport) 1809a51ab396SSteve Ma break; 1810a51ab396SSteve Ma 1811a51ab396SSteve Ma rdata = rport->dd_data; 1812a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, rport->port_id, 1813a51ab396SSteve Ma rdata->e_d_tov); 1814a51ab396SSteve Ma break; 1815a51ab396SSteve Ma 1816a51ab396SSteve Ma case FC_BSG_HST_CT: 1817a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_ct.port_id); 1818a51ab396SSteve Ma if (did == FC_FID_DIR_SERV) 18193a3b42bfSRobert Love rdata = lport->dns_rdata; 1820a51ab396SSteve Ma else 1821a51ab396SSteve Ma rdata = lport->tt.rport_lookup(lport, did); 1822a51ab396SSteve Ma 1823a51ab396SSteve Ma if (!rdata) 1824a51ab396SSteve Ma break; 1825a51ab396SSteve Ma 1826a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); 1827a51ab396SSteve Ma break; 1828a51ab396SSteve Ma 1829a51ab396SSteve Ma case FC_BSG_HST_ELS_NOLOGIN: 1830a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_els.port_id); 1831a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); 1832a51ab396SSteve Ma break; 1833a51ab396SSteve Ma } 1834a51ab396SSteve Ma 1835a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1836a51ab396SSteve Ma return rc; 1837a51ab396SSteve Ma } 1838a51ab396SSteve Ma EXPORT_SYMBOL(fc_lport_bsg_request); 1839