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. 3783a3b42bfSRobert Love * @sp: The sequence in the RLIR exchange 3793a3b42bfSRobert Love * @fp: The RLIR request frame 38042e9a92fSRobert Love * @lport: Fibre Channel local port recieving the RLIR 38142e9a92fSRobert Love * 3821b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 38342e9a92fSRobert Love * this function. 38442e9a92fSRobert Love */ 38542e9a92fSRobert Love static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, 38642e9a92fSRobert Love struct fc_lport *lport) 38742e9a92fSRobert Love { 3887414705eSRobert Love FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", 38942e9a92fSRobert Love fc_lport_state(lport)); 39042e9a92fSRobert Love 39142e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 39242e9a92fSRobert Love fc_frame_free(fp); 39342e9a92fSRobert Love } 39442e9a92fSRobert Love 39542e9a92fSRobert Love /** 39634f42a07SRobert Love * fc_lport_recv_echo_req() - Handle received ECHO request 3973a3b42bfSRobert Love * @sp: The sequence in the ECHO exchange 39842e9a92fSRobert Love * @fp: ECHO request frame 3993a3b42bfSRobert Love * @lport: The local port recieving the ECHO 40042e9a92fSRobert Love * 4011b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 40242e9a92fSRobert Love * this function. 40342e9a92fSRobert Love */ 40442e9a92fSRobert Love static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp, 40542e9a92fSRobert Love struct fc_lport *lport) 40642e9a92fSRobert Love { 40742e9a92fSRobert Love struct fc_frame *fp; 40842e9a92fSRobert Love unsigned int len; 40942e9a92fSRobert Love void *pp; 41042e9a92fSRobert Love void *dp; 41142e9a92fSRobert Love 4121b69bc06SJoe Eykholt FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", 41342e9a92fSRobert Love fc_lport_state(lport)); 41442e9a92fSRobert Love 41542e9a92fSRobert Love len = fr_len(in_fp) - sizeof(struct fc_frame_header); 41642e9a92fSRobert Love pp = fc_frame_payload_get(in_fp, len); 41742e9a92fSRobert Love 41842e9a92fSRobert Love if (len < sizeof(__be32)) 41942e9a92fSRobert Love len = sizeof(__be32); 42042e9a92fSRobert Love 42142e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 42242e9a92fSRobert Love if (fp) { 42342e9a92fSRobert Love dp = fc_frame_payload_get(fp, len); 42442e9a92fSRobert Love memcpy(dp, pp, len); 4251b69bc06SJoe Eykholt *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); 42624f089e2SJoe Eykholt fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); 42724f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 42842e9a92fSRobert Love } 42942e9a92fSRobert Love fc_frame_free(in_fp); 43042e9a92fSRobert Love } 43142e9a92fSRobert Love 43242e9a92fSRobert Love /** 4331b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 4341b69bc06SJoe Eykholt * @sp: The sequence in the RNID exchange 4351b69bc06SJoe Eykholt * @fp: The RNID request frame 4361b69bc06SJoe Eykholt * @lport: The local port recieving the RNID 43742e9a92fSRobert Love * 4381b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 43942e9a92fSRobert Love * this function. 44042e9a92fSRobert Love */ 44142e9a92fSRobert Love static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, 44242e9a92fSRobert Love struct fc_lport *lport) 44342e9a92fSRobert Love { 44442e9a92fSRobert Love struct fc_frame *fp; 44542e9a92fSRobert Love struct fc_els_rnid *req; 44642e9a92fSRobert Love struct { 44742e9a92fSRobert Love struct fc_els_rnid_resp rnid; 44842e9a92fSRobert Love struct fc_els_rnid_cid cid; 44942e9a92fSRobert Love struct fc_els_rnid_gen gen; 45042e9a92fSRobert Love } *rp; 45142e9a92fSRobert Love struct fc_seq_els_data rjt_data; 45242e9a92fSRobert Love u8 fmt; 45342e9a92fSRobert Love size_t len; 45442e9a92fSRobert Love 4557414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 45642e9a92fSRobert Love fc_lport_state(lport)); 45742e9a92fSRobert Love 45842e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 45942e9a92fSRobert Love if (!req) { 46042e9a92fSRobert Love rjt_data.fp = NULL; 46142e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 46242e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 46342e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); 46442e9a92fSRobert Love } else { 46542e9a92fSRobert Love fmt = req->rnid_fmt; 46642e9a92fSRobert Love len = sizeof(*rp); 46742e9a92fSRobert Love if (fmt != ELS_RNIDF_GEN || 46842e9a92fSRobert Love ntohl(lport->rnid_gen.rnid_atype) == 0) { 46942e9a92fSRobert Love fmt = ELS_RNIDF_NONE; /* nothing to provide */ 47042e9a92fSRobert Love len -= sizeof(rp->gen); 47142e9a92fSRobert Love } 47242e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 47342e9a92fSRobert Love if (fp) { 47442e9a92fSRobert Love rp = fc_frame_payload_get(fp, len); 47542e9a92fSRobert Love memset(rp, 0, len); 47642e9a92fSRobert Love rp->rnid.rnid_cmd = ELS_LS_ACC; 47742e9a92fSRobert Love rp->rnid.rnid_fmt = fmt; 47842e9a92fSRobert Love rp->rnid.rnid_cid_len = sizeof(rp->cid); 47942e9a92fSRobert Love rp->cid.rnid_wwpn = htonll(lport->wwpn); 48042e9a92fSRobert Love rp->cid.rnid_wwnn = htonll(lport->wwnn); 48142e9a92fSRobert Love if (fmt == ELS_RNIDF_GEN) { 48242e9a92fSRobert Love rp->rnid.rnid_sid_len = sizeof(rp->gen); 48342e9a92fSRobert Love memcpy(&rp->gen, &lport->rnid_gen, 48442e9a92fSRobert Love sizeof(rp->gen)); 48542e9a92fSRobert Love } 48624f089e2SJoe Eykholt fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); 48724f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 48842e9a92fSRobert Love } 48942e9a92fSRobert Love } 49042e9a92fSRobert Love fc_frame_free(in_fp); 49142e9a92fSRobert Love } 49242e9a92fSRobert Love 49342e9a92fSRobert Love /** 49434f42a07SRobert Love * fc_lport_recv_logo_req() - Handle received fabric LOGO request 4953a3b42bfSRobert Love * @sp: The sequence in the LOGO exchange 4963a3b42bfSRobert Love * @fp: The LOGO request frame 4973a3b42bfSRobert Love * @lport: The local port recieving the LOGO 49842e9a92fSRobert Love * 49942e9a92fSRobert Love * Locking Note: The lport lock is exected to be held before calling 50042e9a92fSRobert Love * this function. 50142e9a92fSRobert Love */ 50242e9a92fSRobert Love static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, 50342e9a92fSRobert Love struct fc_lport *lport) 50442e9a92fSRobert Love { 50542e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 50642e9a92fSRobert Love fc_lport_enter_reset(lport); 50742e9a92fSRobert Love fc_frame_free(fp); 50842e9a92fSRobert Love } 50942e9a92fSRobert Love 51042e9a92fSRobert Love /** 51134f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 5123a3b42bfSRobert Love * @lport: The local port that should log into the fabric 51342e9a92fSRobert Love * 51442e9a92fSRobert Love * Locking Note: This function should not be called 51542e9a92fSRobert Love * with the lport lock held. 51642e9a92fSRobert Love */ 51742e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 51842e9a92fSRobert Love { 51942e9a92fSRobert Love int rc = -1; 52042e9a92fSRobert Love 52142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 52255a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || 52355a66d3cSVasu Dev lport->state == LPORT_ST_LOGO) { 52455a66d3cSVasu Dev fc_lport_state_enter(lport, LPORT_ST_RESET); 52542e9a92fSRobert Love fc_lport_enter_reset(lport); 52642e9a92fSRobert Love rc = 0; 52742e9a92fSRobert Love } 52842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 52942e9a92fSRobert Love 53042e9a92fSRobert Love return rc; 53142e9a92fSRobert Love } 53242e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 53342e9a92fSRobert Love 53442e9a92fSRobert Love /** 5358faecddbSChris Leech * __fc_linkup() - Handler for transport linkup events 5368faecddbSChris Leech * @lport: The lport whose link is up 5378faecddbSChris Leech * 5388faecddbSChris Leech * Locking: must be called with the lp_mutex held 5398faecddbSChris Leech */ 5408faecddbSChris Leech void __fc_linkup(struct fc_lport *lport) 5418faecddbSChris Leech { 5428faecddbSChris Leech if (!lport->link_up) { 5438faecddbSChris Leech lport->link_up = 1; 5448faecddbSChris Leech 5458faecddbSChris Leech if (lport->state == LPORT_ST_RESET) 5468faecddbSChris Leech fc_lport_enter_flogi(lport); 5478faecddbSChris Leech } 5488faecddbSChris Leech } 5498faecddbSChris Leech 5508faecddbSChris Leech /** 55134f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 5523a3b42bfSRobert Love * @lport: The local port whose link is up 55342e9a92fSRobert Love */ 55442e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 55542e9a92fSRobert Love { 556ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", 5577b2787ecSRobert Love lport->host->host_no, lport->port_id); 55842e9a92fSRobert Love 55942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5608faecddbSChris Leech __fc_linkup(lport); 56142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 56242e9a92fSRobert Love } 56342e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 56442e9a92fSRobert Love 56542e9a92fSRobert Love /** 5668faecddbSChris Leech * __fc_linkdown() - Handler for transport linkdown events 5678faecddbSChris Leech * @lport: The lport whose link is down 5688faecddbSChris Leech * 5698faecddbSChris Leech * Locking: must be called with the lp_mutex held 5708faecddbSChris Leech */ 5718faecddbSChris Leech void __fc_linkdown(struct fc_lport *lport) 5728faecddbSChris Leech { 5738faecddbSChris Leech if (lport->link_up) { 5748faecddbSChris Leech lport->link_up = 0; 5758faecddbSChris Leech fc_lport_enter_reset(lport); 5768faecddbSChris Leech lport->tt.fcp_cleanup(lport); 5778faecddbSChris Leech } 5788faecddbSChris Leech } 5798faecddbSChris Leech 5808faecddbSChris Leech /** 58134f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 5823a3b42bfSRobert Love * @lport: The local port whose link is down 58342e9a92fSRobert Love */ 58442e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 58542e9a92fSRobert Love { 586ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", 5877b2787ecSRobert Love lport->host->host_no, lport->port_id); 58842e9a92fSRobert Love 5898faecddbSChris Leech mutex_lock(&lport->lp_mutex); 5908faecddbSChris Leech __fc_linkdown(lport); 59142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 59242e9a92fSRobert Love } 59342e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 59442e9a92fSRobert Love 59542e9a92fSRobert Love /** 59634f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 5973a3b42bfSRobert Love * @lport: The local port to logoff the fabric 59842e9a92fSRobert Love * 59942e9a92fSRobert Love * Return value: 60042e9a92fSRobert Love * 0 for success, -1 for failure 60134f42a07SRobert Love */ 60242e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 60342e9a92fSRobert Love { 60442e9a92fSRobert Love lport->tt.disc_stop_final(lport); 60542e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 6063a3b42bfSRobert Love if (lport->dns_rdata) 6073a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 608a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 609a0fd2e49SAbhijeet Joglekar lport->tt.rport_flush_queue(); 610a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 61142e9a92fSRobert Love fc_lport_enter_logo(lport); 61242e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 613f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 61442e9a92fSRobert Love return 0; 61542e9a92fSRobert Love } 61642e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 61742e9a92fSRobert Love 61842e9a92fSRobert Love /** 6193a3b42bfSRobert Love * fc_lport_destroy() - Unregister a fc_lport 6203a3b42bfSRobert Love * @lport: The local port to unregister 62142e9a92fSRobert Love * 62242e9a92fSRobert Love * Note: 62342e9a92fSRobert Love * exit routine for fc_lport instance 62442e9a92fSRobert Love * clean-up all the allocated memory 62542e9a92fSRobert Love * and free up other system resources. 62642e9a92fSRobert Love * 62734f42a07SRobert Love */ 62842e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 62942e9a92fSRobert Love { 630bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 631b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 632bbf15669SAbhijeet Joglekar lport->link_up = 0; 63342e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 634bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 635bbf15669SAbhijeet Joglekar 63642e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 637e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 6381f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 63942e9a92fSRobert Love return 0; 64042e9a92fSRobert Love } 64142e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 64242e9a92fSRobert Love 64342e9a92fSRobert Love /** 6443a3b42bfSRobert Love * fc_set_mfs() - Set the maximum frame size for a local port 6453a3b42bfSRobert Love * @lport: The local port to set the MFS for 6463a3b42bfSRobert Love * @mfs: The new MFS 64734f42a07SRobert Love */ 64842e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 64942e9a92fSRobert Love { 65042e9a92fSRobert Love unsigned int old_mfs; 65142e9a92fSRobert Love int rc = -EINVAL; 65242e9a92fSRobert Love 65342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 65442e9a92fSRobert Love 65542e9a92fSRobert Love old_mfs = lport->mfs; 65642e9a92fSRobert Love 65742e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 65842e9a92fSRobert Love mfs &= ~3; 65942e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 66042e9a92fSRobert Love mfs = FC_MAX_FRAME; 66142e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 66242e9a92fSRobert Love lport->mfs = mfs; 66342e9a92fSRobert Love rc = 0; 66442e9a92fSRobert Love } 66542e9a92fSRobert Love 66642e9a92fSRobert Love if (!rc && mfs < old_mfs) 66742e9a92fSRobert Love fc_lport_enter_reset(lport); 66842e9a92fSRobert Love 66942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 67042e9a92fSRobert Love 67142e9a92fSRobert Love return rc; 67242e9a92fSRobert Love } 67342e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 67442e9a92fSRobert Love 67542e9a92fSRobert Love /** 67634f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 6773a3b42bfSRobert Love * @lport: The local port receiving the event 67842e9a92fSRobert Love * @event: The discovery event 67942e9a92fSRobert Love */ 68042e9a92fSRobert Love void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) 68142e9a92fSRobert Love { 68242e9a92fSRobert Love switch (event) { 68342e9a92fSRobert Love case DISC_EV_SUCCESS: 6847414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 68542e9a92fSRobert Love break; 68642e9a92fSRobert Love case DISC_EV_FAILED: 687e6d8a1b0SJoe Eykholt printk(KERN_ERR "host%d: libfc: " 688ce8b5df0SChris Leech "Discovery failed for port (%6.6x)\n", 6897b2787ecSRobert Love lport->host->host_no, lport->port_id); 69042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 69142e9a92fSRobert Love fc_lport_enter_reset(lport); 69242e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 69342e9a92fSRobert Love break; 69442e9a92fSRobert Love case DISC_EV_NONE: 69542e9a92fSRobert Love WARN_ON(1); 69642e9a92fSRobert Love break; 69742e9a92fSRobert Love } 69842e9a92fSRobert Love } 69942e9a92fSRobert Love 70042e9a92fSRobert Love /** 70134f42a07SRobert Love * fc_rport_enter_ready() - Enter the ready state and start discovery 7023a3b42bfSRobert Love * @lport: The local port that is ready 70342e9a92fSRobert Love * 70442e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 70542e9a92fSRobert Love * this routine. 70642e9a92fSRobert Love */ 70742e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 70842e9a92fSRobert Love { 7097414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 7107414705eSRobert Love fc_lport_state(lport)); 71142e9a92fSRobert Love 71242e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 7138faecddbSChris Leech if (lport->vport) 7148faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); 7158faecddbSChris Leech fc_vports_linkchange(lport); 71642e9a92fSRobert Love 7173a3b42bfSRobert Love if (!lport->ptp_rdata) 71842e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 71942e9a92fSRobert Love } 72042e9a92fSRobert Love 72142e9a92fSRobert Love /** 722093bb6a2SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID 723093bb6a2SJoe Eykholt * @lport: The local port which will have its Port ID set. 724093bb6a2SJoe Eykholt * @port_id: The new port ID. 725093bb6a2SJoe Eykholt * @fp: The frame containing the incoming request, or NULL. 726093bb6a2SJoe Eykholt * 727093bb6a2SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 728093bb6a2SJoe Eykholt * this function. 729093bb6a2SJoe Eykholt */ 730093bb6a2SJoe Eykholt static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, 731093bb6a2SJoe Eykholt struct fc_frame *fp) 732093bb6a2SJoe Eykholt { 733093bb6a2SJoe Eykholt if (port_id) 734ce8b5df0SChris Leech printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", 735093bb6a2SJoe Eykholt lport->host->host_no, port_id); 736093bb6a2SJoe Eykholt 7377b2787ecSRobert Love lport->port_id = port_id; 7387b2787ecSRobert Love 7397b2787ecSRobert Love /* Update the fc_host */ 740093bb6a2SJoe Eykholt fc_host_port_id(lport->host) = port_id; 7417b2787ecSRobert Love 742093bb6a2SJoe Eykholt if (lport->tt.lport_set_port_id) 743093bb6a2SJoe Eykholt lport->tt.lport_set_port_id(lport, port_id, fp); 744093bb6a2SJoe Eykholt } 745093bb6a2SJoe Eykholt 746093bb6a2SJoe Eykholt /** 7473726f358SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint 7483726f358SJoe Eykholt * @lport: The local port which will have its Port ID set. 7493726f358SJoe Eykholt * @port_id: The new port ID. 7503726f358SJoe Eykholt * 7513726f358SJoe Eykholt * Called by the lower-level driver when transport sets the local port_id. 7523726f358SJoe Eykholt * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and 7533726f358SJoe Eykholt * discovery to be skipped. 7543726f358SJoe Eykholt */ 7553726f358SJoe Eykholt void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id) 7563726f358SJoe Eykholt { 7573726f358SJoe Eykholt mutex_lock(&lport->lp_mutex); 7583726f358SJoe Eykholt 7593726f358SJoe Eykholt fc_lport_set_port_id(lport, port_id, NULL); 7603726f358SJoe Eykholt 7613726f358SJoe Eykholt switch (lport->state) { 7623726f358SJoe Eykholt case LPORT_ST_RESET: 7633726f358SJoe Eykholt case LPORT_ST_FLOGI: 7643726f358SJoe Eykholt if (port_id) 7653726f358SJoe Eykholt fc_lport_enter_ready(lport); 7663726f358SJoe Eykholt break; 7673726f358SJoe Eykholt default: 7683726f358SJoe Eykholt break; 7693726f358SJoe Eykholt } 7703726f358SJoe Eykholt mutex_unlock(&lport->lp_mutex); 7713726f358SJoe Eykholt } 7723726f358SJoe Eykholt EXPORT_SYMBOL(fc_lport_set_local_id); 7733726f358SJoe Eykholt 7743726f358SJoe Eykholt /** 77534f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 77642e9a92fSRobert Love * @sp_in: The sequence the FLOGI is on 7773a3b42bfSRobert Love * @rx_fp: The FLOGI frame 7783a3b42bfSRobert Love * @lport: The local port that recieved the request 77942e9a92fSRobert Love * 78042e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 78142e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 78242e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 78342e9a92fSRobert Love * 7841b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 78542e9a92fSRobert Love * this function. 78642e9a92fSRobert Love */ 78742e9a92fSRobert Love static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, 78842e9a92fSRobert Love struct fc_frame *rx_fp, 78942e9a92fSRobert Love struct fc_lport *lport) 79042e9a92fSRobert Love { 79142e9a92fSRobert Love struct fc_frame *fp; 79224f089e2SJoe Eykholt struct fc_frame_header *fh; 79342e9a92fSRobert Love struct fc_seq *sp; 79442e9a92fSRobert Love struct fc_els_flogi *flp; 79542e9a92fSRobert Love struct fc_els_flogi *new_flp; 79642e9a92fSRobert Love u64 remote_wwpn; 79742e9a92fSRobert Love u32 remote_fid; 79842e9a92fSRobert Love u32 local_fid; 79942e9a92fSRobert Love 8007414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 80142e9a92fSRobert Love fc_lport_state(lport)); 80242e9a92fSRobert Love 803251748a9SJoe Eykholt remote_fid = fc_frame_sid(rx_fp); 80442e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 80542e9a92fSRobert Love if (!flp) 80642e9a92fSRobert Love goto out; 80742e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 80842e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 809e6d8a1b0SJoe Eykholt printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " 8109f8f3aa6SChris Leech "with same WWPN %16.16llx\n", 811e6d8a1b0SJoe Eykholt lport->host->host_no, remote_wwpn); 81242e9a92fSRobert Love goto out; 81342e9a92fSRobert Love } 8149f8f3aa6SChris Leech FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); 81542e9a92fSRobert Love 81642e9a92fSRobert Love /* 81742e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 81842e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 81942e9a92fSRobert Love * But if so, both of us could end up with the same FID. 82042e9a92fSRobert Love */ 82142e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 82242e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 82342e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 82442e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 82542e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 82642e9a92fSRobert Love } else if (!remote_fid) { 82742e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 82842e9a92fSRobert Love } 82942e9a92fSRobert Love 830093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, local_fid, rx_fp); 83142e9a92fSRobert Love 83242e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 83342e9a92fSRobert Love if (fp) { 83442e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 83542e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 83642e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 83742e9a92fSRobert Love 83842e9a92fSRobert Love /* 83942e9a92fSRobert Love * Send the response. If this fails, the originator should 84042e9a92fSRobert Love * repeat the sequence. 84142e9a92fSRobert Love */ 84224f089e2SJoe Eykholt fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); 84324f089e2SJoe Eykholt fh = fc_frame_header_get(fp); 84424f089e2SJoe Eykholt hton24(fh->fh_s_id, local_fid); 84524f089e2SJoe Eykholt hton24(fh->fh_d_id, remote_fid); 84624f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 84742e9a92fSRobert Love 84842e9a92fSRobert Love } else { 84942e9a92fSRobert Love fc_lport_error(lport, fp); 85042e9a92fSRobert Love } 85142e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 85242e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 85342e9a92fSRobert Love 85442e9a92fSRobert Love out: 85542e9a92fSRobert Love sp = fr_seq(rx_fp); 85642e9a92fSRobert Love fc_frame_free(rx_fp); 85742e9a92fSRobert Love } 85842e9a92fSRobert Love 85942e9a92fSRobert Love /** 86034f42a07SRobert Love * fc_lport_recv_req() - The generic lport request handler 8613a3b42bfSRobert Love * @lport: The local port that received the request 86242e9a92fSRobert Love * @sp: The sequence the request is on 8633a3b42bfSRobert Love * @fp: The request frame 86442e9a92fSRobert Love * 86542e9a92fSRobert Love * This function will see if the lport handles the request or 86642e9a92fSRobert Love * if an rport should handle the request. 86742e9a92fSRobert Love * 86842e9a92fSRobert Love * Locking Note: This function should not be called with the lport 86942e9a92fSRobert Love * lock held becuase it will grab the lock. 87042e9a92fSRobert Love */ 87142e9a92fSRobert Love static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, 87242e9a92fSRobert Love struct fc_frame *fp) 87342e9a92fSRobert Love { 87442e9a92fSRobert Love struct fc_frame_header *fh = fc_frame_header_get(fp); 87542e9a92fSRobert Love void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); 87642e9a92fSRobert Love 87742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 87842e9a92fSRobert Love 87942e9a92fSRobert Love /* 88042e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 88142e9a92fSRobert Love * RSCN here. These don't require a session. 88242e9a92fSRobert Love * Even if we had a session, it might not be ready. 88342e9a92fSRobert Love */ 884e9ba8b42SJoe Eykholt if (!lport->link_up) 885e9ba8b42SJoe Eykholt fc_frame_free(fp); 886e9ba8b42SJoe Eykholt else if (fh->fh_type == FC_TYPE_ELS && 887e9ba8b42SJoe Eykholt fh->fh_r_ctl == FC_RCTL_ELS_REQ) { 88842e9a92fSRobert Love /* 88942e9a92fSRobert Love * Check opcode. 89042e9a92fSRobert Love */ 891131203a1SJoe Eykholt recv = lport->tt.rport_recv_req; 89242e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 89342e9a92fSRobert Love case ELS_FLOGI: 894a7b12a27SJoe Eykholt if (!lport->point_to_multipoint) 89542e9a92fSRobert Love recv = fc_lport_recv_flogi_req; 89642e9a92fSRobert Love break; 89742e9a92fSRobert Love case ELS_LOGO: 898251748a9SJoe Eykholt if (fc_frame_sid(fp) == FC_FID_FLOGI) 89942e9a92fSRobert Love recv = fc_lport_recv_logo_req; 90042e9a92fSRobert Love break; 90142e9a92fSRobert Love case ELS_RSCN: 90242e9a92fSRobert Love recv = lport->tt.disc_recv_req; 90342e9a92fSRobert Love break; 90442e9a92fSRobert Love case ELS_ECHO: 90542e9a92fSRobert Love recv = fc_lport_recv_echo_req; 90642e9a92fSRobert Love break; 90742e9a92fSRobert Love case ELS_RLIR: 90842e9a92fSRobert Love recv = fc_lport_recv_rlir_req; 90942e9a92fSRobert Love break; 91042e9a92fSRobert Love case ELS_RNID: 91142e9a92fSRobert Love recv = fc_lport_recv_rnid_req; 91242e9a92fSRobert Love break; 91342e9a92fSRobert Love } 91442e9a92fSRobert Love 91542e9a92fSRobert Love recv(sp, fp, lport); 91642e9a92fSRobert Love } else { 9177414705eSRobert Love FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", 9187414705eSRobert Love fr_eof(fp)); 91942e9a92fSRobert Love fc_frame_free(fp); 92042e9a92fSRobert Love } 92142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 92242e9a92fSRobert Love 92342e9a92fSRobert Love /* 92442e9a92fSRobert Love * The common exch_done for all request may not be good 92542e9a92fSRobert Love * if any request requires longer hold on exhange. XXX 92642e9a92fSRobert Love */ 92742e9a92fSRobert Love lport->tt.exch_done(sp); 92842e9a92fSRobert Love } 92942e9a92fSRobert Love 93042e9a92fSRobert Love /** 9313a3b42bfSRobert Love * fc_lport_reset() - Reset a local port 9323a3b42bfSRobert Love * @lport: The local port which should be reset 93342e9a92fSRobert Love * 93442e9a92fSRobert Love * Locking Note: This functions should not be called with the 93542e9a92fSRobert Love * lport lock held. 93642e9a92fSRobert Love */ 93742e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 93842e9a92fSRobert Love { 939f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 94042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 94142e9a92fSRobert Love fc_lport_enter_reset(lport); 94242e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 94342e9a92fSRobert Love return 0; 94442e9a92fSRobert Love } 94542e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 94642e9a92fSRobert Love 94742e9a92fSRobert Love /** 9483a3b42bfSRobert Love * fc_lport_reset_locked() - Reset the local port w/ the lport lock held 9493a3b42bfSRobert Love * @lport: The local port to be reset 95042e9a92fSRobert Love * 95142e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 95242e9a92fSRobert Love * this routine. 95342e9a92fSRobert Love */ 9541190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 95542e9a92fSRobert Love { 9563a3b42bfSRobert Love if (lport->dns_rdata) 9573a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 95842e9a92fSRobert Love 9592f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 9602f2ac4a0SJoe Eykholt lport->tt.rport_logoff(lport->ptp_rdata); 9612f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 9623a3b42bfSRobert Love lport->ptp_rdata = NULL; 9632f2ac4a0SJoe Eykholt } 96442e9a92fSRobert Love 96542e9a92fSRobert Love lport->tt.disc_stop(lport); 96642e9a92fSRobert Love 9671f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 96842e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 969093bb6a2SJoe Eykholt 9703726f358SJoe Eykholt if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up)) 971093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, 0, NULL); 9721190d925SJoe Eykholt } 97342e9a92fSRobert Love 9741190d925SJoe Eykholt /** 9751190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 9763a3b42bfSRobert Love * @lport: The local port to be reset 9771190d925SJoe Eykholt * 9781190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9791190d925SJoe Eykholt * this routine. 9801190d925SJoe Eykholt */ 9811190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 9821190d925SJoe Eykholt { 9831190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 9841190d925SJoe Eykholt fc_lport_state(lport)); 9851190d925SJoe Eykholt 98655a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) 98755a66d3cSVasu Dev return; 98855a66d3cSVasu Dev 9898faecddbSChris Leech if (lport->vport) { 9908faecddbSChris Leech if (lport->link_up) 9918faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); 9928faecddbSChris Leech else 9938faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); 9948faecddbSChris Leech } 9951190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 9968faecddbSChris Leech fc_vports_linkchange(lport); 9971190d925SJoe Eykholt fc_lport_reset_locked(lport); 998bc0e17f6SVasu Dev if (lport->link_up) 99942e9a92fSRobert Love fc_lport_enter_flogi(lport); 100042e9a92fSRobert Love } 100142e9a92fSRobert Love 100242e9a92fSRobert Love /** 10033a3b42bfSRobert Love * fc_lport_enter_disabled() - Disable the local port 10043a3b42bfSRobert Love * @lport: The local port to be reset 10051190d925SJoe Eykholt * 10061190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 10071190d925SJoe Eykholt * this routine. 10081190d925SJoe Eykholt */ 10091190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 10101190d925SJoe Eykholt { 10111190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 10121190d925SJoe Eykholt fc_lport_state(lport)); 10131190d925SJoe Eykholt 10141190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 10158faecddbSChris Leech fc_vports_linkchange(lport); 10161190d925SJoe Eykholt fc_lport_reset_locked(lport); 10171190d925SJoe Eykholt } 10181190d925SJoe Eykholt 10191190d925SJoe Eykholt /** 102034f42a07SRobert Love * fc_lport_error() - Handler for any errors 10213a3b42bfSRobert Love * @lport: The local port that the error was on 10223a3b42bfSRobert Love * @fp: The error code encoded in a frame pointer 102342e9a92fSRobert Love * 102442e9a92fSRobert Love * If the error was caused by a resource allocation failure 102542e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 102642e9a92fSRobert Love * after the e_d_tov time. 102742e9a92fSRobert Love */ 102842e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 102942e9a92fSRobert Love { 103042e9a92fSRobert Love unsigned long delay = 0; 10317414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 103242e9a92fSRobert Love PTR_ERR(fp), fc_lport_state(lport), 103342e9a92fSRobert Love lport->retry_count); 103442e9a92fSRobert Love 103542e9a92fSRobert Love if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { 103642e9a92fSRobert Love /* 103742e9a92fSRobert Love * Memory allocation failure, or the exchange timed out. 103842e9a92fSRobert Love * Retry after delay 103942e9a92fSRobert Love */ 104042e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 104142e9a92fSRobert Love lport->retry_count++; 104242e9a92fSRobert Love if (!fp) 104342e9a92fSRobert Love delay = msecs_to_jiffies(500); 104442e9a92fSRobert Love else 104542e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 104642e9a92fSRobert Love 104742e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 104842e9a92fSRobert Love } else { 104942e9a92fSRobert Love switch (lport->state) { 1050b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 105142e9a92fSRobert Love case LPORT_ST_READY: 105242e9a92fSRobert Love case LPORT_ST_RESET: 1053c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 10545baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1055c9866a54SChris Leech case LPORT_ST_RSPN_ID: 105642e9a92fSRobert Love case LPORT_ST_RFT_ID: 1057ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 105842e9a92fSRobert Love case LPORT_ST_SCR: 105942e9a92fSRobert Love case LPORT_ST_DNS: 106042e9a92fSRobert Love case LPORT_ST_FLOGI: 106142e9a92fSRobert Love case LPORT_ST_LOGO: 106242e9a92fSRobert Love fc_lport_enter_reset(lport); 106342e9a92fSRobert Love break; 106442e9a92fSRobert Love } 106542e9a92fSRobert Love } 106642e9a92fSRobert Love } 106742e9a92fSRobert Love } 106842e9a92fSRobert Love 106942e9a92fSRobert Love /** 10707cccc157SChris Leech * fc_lport_ns_resp() - Handle response to a name server 10717cccc157SChris Leech * registration exchange 10727cccc157SChris Leech * @sp: current sequence in exchange 107342e9a92fSRobert Love * @fp: response frame 107442e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 107542e9a92fSRobert Love * 107642e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 10773a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 107842e9a92fSRobert Love * and then unlock the lport. 107942e9a92fSRobert Love */ 10807cccc157SChris Leech static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, 108142e9a92fSRobert Love void *lp_arg) 108242e9a92fSRobert Love { 108342e9a92fSRobert Love struct fc_lport *lport = lp_arg; 108442e9a92fSRobert Love struct fc_frame_header *fh; 108542e9a92fSRobert Love struct fc_ct_hdr *ct; 108642e9a92fSRobert Love 10877cccc157SChris Leech FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); 1088f657d299SJoe Eykholt 108942e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 109042e9a92fSRobert Love return; 109142e9a92fSRobert Love 109242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 109342e9a92fSRobert Love 1094ab593b18SJoe Eykholt if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { 10957cccc157SChris Leech FC_LPORT_DBG(lport, "Received a name server response, " 10967cccc157SChris Leech "but in state %s\n", fc_lport_state(lport)); 109776f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 109876f6804eSAbhijeet Joglekar goto err; 109942e9a92fSRobert Love goto out; 110042e9a92fSRobert Love } 110142e9a92fSRobert Love 110276f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 110376f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 110476f6804eSAbhijeet Joglekar goto err; 110576f6804eSAbhijeet Joglekar } 110676f6804eSAbhijeet Joglekar 110742e9a92fSRobert Love fh = fc_frame_header_get(fp); 110842e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 110942e9a92fSRobert Love 111042e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 111142e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 111242e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 111342e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 11147cccc157SChris Leech switch (lport->state) { 11157cccc157SChris Leech case LPORT_ST_RNN_ID: 1116c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); 11177cccc157SChris Leech break; 11187cccc157SChris Leech case LPORT_ST_RSNN_NN: 1119c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); 11207cccc157SChris Leech break; 11217cccc157SChris Leech case LPORT_ST_RSPN_ID: 1122c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 11237cccc157SChris Leech break; 11247cccc157SChris Leech case LPORT_ST_RFT_ID: 1125ab593b18SJoe Eykholt fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); 1126ab593b18SJoe Eykholt break; 1127ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 11287cccc157SChris Leech fc_lport_enter_scr(lport); 11297cccc157SChris Leech break; 11307cccc157SChris Leech default: 11317cccc157SChris Leech /* should have already been caught by state checks */ 11327cccc157SChris Leech break; 11337cccc157SChris Leech } 1134c9c7bd7aSChris Leech else 1135c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1136c9c7bd7aSChris Leech out: 1137c9c7bd7aSChris Leech fc_frame_free(fp); 1138c9c7bd7aSChris Leech err: 1139c9c7bd7aSChris Leech mutex_unlock(&lport->lp_mutex); 1140c9c7bd7aSChris Leech } 1141c9c7bd7aSChris Leech 1142c9c7bd7aSChris Leech /** 114334f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 114442e9a92fSRobert Love * @sp: current sequence in SCR exchange 114542e9a92fSRobert Love * @fp: response frame 114642e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 114742e9a92fSRobert Love * 114842e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 114942e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 115042e9a92fSRobert Love * and then unlock the lport. 115142e9a92fSRobert Love */ 115242e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 115342e9a92fSRobert Love void *lp_arg) 115442e9a92fSRobert Love { 115542e9a92fSRobert Love struct fc_lport *lport = lp_arg; 115642e9a92fSRobert Love u8 op; 115742e9a92fSRobert Love 1158f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1159f657d299SJoe Eykholt 116042e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 116142e9a92fSRobert Love return; 116242e9a92fSRobert Love 116342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 116442e9a92fSRobert Love 116542e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 11667414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 11677414705eSRobert Love "%s\n", fc_lport_state(lport)); 116876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 116976f6804eSAbhijeet Joglekar goto err; 117042e9a92fSRobert Love goto out; 117142e9a92fSRobert Love } 117242e9a92fSRobert Love 117376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 117476f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 117576f6804eSAbhijeet Joglekar goto err; 117676f6804eSAbhijeet Joglekar } 117776f6804eSAbhijeet Joglekar 117842e9a92fSRobert Love op = fc_frame_payload_op(fp); 117942e9a92fSRobert Love if (op == ELS_LS_ACC) 118042e9a92fSRobert Love fc_lport_enter_ready(lport); 118142e9a92fSRobert Love else 118242e9a92fSRobert Love fc_lport_error(lport, fp); 118342e9a92fSRobert Love 118442e9a92fSRobert Love out: 118542e9a92fSRobert Love fc_frame_free(fp); 118642e9a92fSRobert Love err: 118742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 118842e9a92fSRobert Love } 118942e9a92fSRobert Love 119042e9a92fSRobert Love /** 11913a3b42bfSRobert Love * fc_lport_enter_scr() - Send a SCR (State Change Register) request 11923a3b42bfSRobert Love * @lport: The local port to register for state changes 119342e9a92fSRobert Love * 119442e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 119542e9a92fSRobert Love * this routine. 119642e9a92fSRobert Love */ 119742e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 119842e9a92fSRobert Love { 119942e9a92fSRobert Love struct fc_frame *fp; 120042e9a92fSRobert Love 12017414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 12027414705eSRobert Love fc_lport_state(lport)); 120342e9a92fSRobert Love 120442e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 120542e9a92fSRobert Love 120642e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 120742e9a92fSRobert Love if (!fp) { 120842e9a92fSRobert Love fc_lport_error(lport, fp); 120942e9a92fSRobert Love return; 121042e9a92fSRobert Love } 121142e9a92fSRobert Love 1212a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 1213b94f8951SJoe Eykholt fc_lport_scr_resp, lport, 1214b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 12158f550f93SChris Leech fc_lport_error(lport, NULL); 121642e9a92fSRobert Love } 121742e9a92fSRobert Love 121842e9a92fSRobert Love /** 1219c914f7d1SChris Leech * fc_lport_enter_ns() - register some object with the name server 122042e9a92fSRobert Love * @lport: Fibre Channel local port to register 122142e9a92fSRobert Love * 122242e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 122342e9a92fSRobert Love * this routine. 122442e9a92fSRobert Love */ 1225c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) 122642e9a92fSRobert Love { 122742e9a92fSRobert Love struct fc_frame *fp; 1228c914f7d1SChris Leech enum fc_ns_req cmd; 1229c914f7d1SChris Leech int size = sizeof(struct fc_ct_hdr); 1230c914f7d1SChris Leech size_t len; 123142e9a92fSRobert Love 1232c914f7d1SChris Leech FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1233c914f7d1SChris Leech fc_lport_state_names[state], 12347414705eSRobert Love fc_lport_state(lport)); 123542e9a92fSRobert Love 1236c914f7d1SChris Leech fc_lport_state_enter(lport, state); 123742e9a92fSRobert Love 1238c914f7d1SChris Leech switch (state) { 1239c914f7d1SChris Leech case LPORT_ST_RNN_ID: 1240c914f7d1SChris Leech cmd = FC_NS_RNN_ID; 1241c914f7d1SChris Leech size += sizeof(struct fc_ns_rn_id); 124242e9a92fSRobert Love break; 1243c914f7d1SChris Leech case LPORT_ST_RSNN_NN: 1244c9866a54SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1245c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1246c914f7d1SChris Leech if (!len) 1247c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1248c914f7d1SChris Leech cmd = FC_NS_RSNN_NN; 1249c914f7d1SChris Leech size += sizeof(struct fc_ns_rsnn) + len; 1250c914f7d1SChris Leech break; 1251c914f7d1SChris Leech case LPORT_ST_RSPN_ID: 12525baa17c3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1253c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1254c914f7d1SChris Leech if (!len) 1255c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1256c914f7d1SChris Leech cmd = FC_NS_RSPN_ID; 1257c914f7d1SChris Leech size += sizeof(struct fc_ns_rspn) + len; 1258c914f7d1SChris Leech break; 1259c914f7d1SChris Leech case LPORT_ST_RFT_ID: 1260c914f7d1SChris Leech cmd = FC_NS_RFT_ID; 1261c914f7d1SChris Leech size += sizeof(struct fc_ns_rft); 1262c914f7d1SChris Leech break; 1263ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1264ab593b18SJoe Eykholt cmd = FC_NS_RFF_ID; 1265ab593b18SJoe Eykholt size += sizeof(struct fc_ns_rff_id); 1266ab593b18SJoe Eykholt break; 1267c914f7d1SChris Leech default: 1268c914f7d1SChris Leech fc_lport_error(lport, NULL); 1269c914f7d1SChris Leech return; 1270c914f7d1SChris Leech } 1271c914f7d1SChris Leech 1272c914f7d1SChris Leech fp = fc_frame_alloc(lport, size); 12735baa17c3SChris Leech if (!fp) { 12745baa17c3SChris Leech fc_lport_error(lport, fp); 12755baa17c3SChris Leech return; 12765baa17c3SChris Leech } 12775baa17c3SChris Leech 1278c914f7d1SChris Leech if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, 12797cccc157SChris Leech fc_lport_ns_resp, 1280b94f8951SJoe Eykholt lport, 3 * lport->r_a_tov)) 1281c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1282c9c7bd7aSChris Leech } 1283c9c7bd7aSChris Leech 128442e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 128542e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 128642e9a92fSRobert Love }; 128742e9a92fSRobert Love 128842e9a92fSRobert Love /** 12893a3b42bfSRobert Love * fc_rport_enter_dns() - Create a fc_rport for the name server 12903a3b42bfSRobert Love * @lport: The local port requesting a remote port for the name server 129142e9a92fSRobert Love * 129242e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 129342e9a92fSRobert Love * this routine. 129442e9a92fSRobert Love */ 129542e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 129642e9a92fSRobert Love { 1297ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 129842e9a92fSRobert Love 12997414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 13007414705eSRobert Love fc_lport_state(lport)); 130142e9a92fSRobert Love 130242e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 130342e9a92fSRobert Love 130448f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 13059737e6a7SRobert Love rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); 130648f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 13079fb9d328SJoe Eykholt if (!rdata) 130842e9a92fSRobert Love goto err; 130942e9a92fSRobert Love 131042e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 13119fb9d328SJoe Eykholt lport->tt.rport_login(rdata); 131242e9a92fSRobert Love return; 131342e9a92fSRobert Love 131442e9a92fSRobert Love err: 131542e9a92fSRobert Love fc_lport_error(lport, NULL); 131642e9a92fSRobert Love } 131742e9a92fSRobert Love 131842e9a92fSRobert Love /** 13193a3b42bfSRobert Love * fc_lport_timeout() - Handler for the retry_work timer 13203a3b42bfSRobert Love * @work: The work struct of the local port 132142e9a92fSRobert Love */ 132242e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 132342e9a92fSRobert Love { 132442e9a92fSRobert Love struct fc_lport *lport = 132542e9a92fSRobert Love container_of(work, struct fc_lport, 132642e9a92fSRobert Love retry_work.work); 132742e9a92fSRobert Love 132842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 132942e9a92fSRobert Love 133042e9a92fSRobert Love switch (lport->state) { 1331b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 133242e9a92fSRobert Love WARN_ON(1); 133342e9a92fSRobert Love break; 133422655ac2SJoe Eykholt case LPORT_ST_READY: 133522655ac2SJoe Eykholt WARN_ON(1); 133622655ac2SJoe Eykholt break; 133722655ac2SJoe Eykholt case LPORT_ST_RESET: 133822655ac2SJoe Eykholt break; 133942e9a92fSRobert Love case LPORT_ST_FLOGI: 134042e9a92fSRobert Love fc_lport_enter_flogi(lport); 134142e9a92fSRobert Love break; 134242e9a92fSRobert Love case LPORT_ST_DNS: 134342e9a92fSRobert Love fc_lport_enter_dns(lport); 134442e9a92fSRobert Love break; 1345c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 13465baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1347c9866a54SChris Leech case LPORT_ST_RSPN_ID: 134842e9a92fSRobert Love case LPORT_ST_RFT_ID: 1349ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1350c914f7d1SChris Leech fc_lport_enter_ns(lport, lport->state); 135142e9a92fSRobert Love break; 135242e9a92fSRobert Love case LPORT_ST_SCR: 135342e9a92fSRobert Love fc_lport_enter_scr(lport); 135442e9a92fSRobert Love break; 135542e9a92fSRobert Love case LPORT_ST_LOGO: 135642e9a92fSRobert Love fc_lport_enter_logo(lport); 135742e9a92fSRobert Love break; 135842e9a92fSRobert Love } 135942e9a92fSRobert Love 136042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 136142e9a92fSRobert Love } 136242e9a92fSRobert Love 136342e9a92fSRobert Love /** 136434f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 13653a3b42bfSRobert Love * @sp: The sequence that the LOGO was on 13663a3b42bfSRobert Love * @fp: The LOGO frame 13673a3b42bfSRobert Love * @lp_arg: The lport port that received the LOGO request 136842e9a92fSRobert Love * 136942e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 13703a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 137142e9a92fSRobert Love * and then unlock the lport. 137242e9a92fSRobert Love */ 137311b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 137442e9a92fSRobert Love void *lp_arg) 137542e9a92fSRobert Love { 137642e9a92fSRobert Love struct fc_lport *lport = lp_arg; 137742e9a92fSRobert Love u8 op; 137842e9a92fSRobert Love 1379f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1380f657d299SJoe Eykholt 138142e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 138242e9a92fSRobert Love return; 138342e9a92fSRobert Love 138442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 138542e9a92fSRobert Love 138642e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 13877414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 13887414705eSRobert Love "%s\n", fc_lport_state(lport)); 138976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 139076f6804eSAbhijeet Joglekar goto err; 139142e9a92fSRobert Love goto out; 139242e9a92fSRobert Love } 139342e9a92fSRobert Love 139476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 139576f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 139676f6804eSAbhijeet Joglekar goto err; 139776f6804eSAbhijeet Joglekar } 139876f6804eSAbhijeet Joglekar 139942e9a92fSRobert Love op = fc_frame_payload_op(fp); 140042e9a92fSRobert Love if (op == ELS_LS_ACC) 14011190d925SJoe Eykholt fc_lport_enter_disabled(lport); 140242e9a92fSRobert Love else 140342e9a92fSRobert Love fc_lport_error(lport, fp); 140442e9a92fSRobert Love 140542e9a92fSRobert Love out: 140642e9a92fSRobert Love fc_frame_free(fp); 140742e9a92fSRobert Love err: 140842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 140942e9a92fSRobert Love } 141011b56188SChris Leech EXPORT_SYMBOL(fc_lport_logo_resp); 141142e9a92fSRobert Love 141242e9a92fSRobert Love /** 141334f42a07SRobert Love * fc_rport_enter_logo() - Logout of the fabric 14143a3b42bfSRobert Love * @lport: The local port to be logged out 141542e9a92fSRobert Love * 141642e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 141742e9a92fSRobert Love * this routine. 141842e9a92fSRobert Love */ 141942e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 142042e9a92fSRobert Love { 142142e9a92fSRobert Love struct fc_frame *fp; 142242e9a92fSRobert Love struct fc_els_logo *logo; 142342e9a92fSRobert Love 14247414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 14257414705eSRobert Love fc_lport_state(lport)); 142642e9a92fSRobert Love 142742e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 14288faecddbSChris Leech fc_vports_linkchange(lport); 142942e9a92fSRobert Love 143042e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 143142e9a92fSRobert Love if (!fp) { 143242e9a92fSRobert Love fc_lport_error(lport, fp); 143342e9a92fSRobert Love return; 143442e9a92fSRobert Love } 143542e9a92fSRobert Love 1436a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1437b94f8951SJoe Eykholt fc_lport_logo_resp, lport, 1438b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 14398f550f93SChris Leech fc_lport_error(lport, NULL); 144042e9a92fSRobert Love } 144142e9a92fSRobert Love 144242e9a92fSRobert Love /** 144334f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 14443a3b42bfSRobert Love * @sp: The sequence that the FLOGI was on 14453a3b42bfSRobert Love * @fp: The FLOGI response frame 14463a3b42bfSRobert Love * @lp_arg: The lport port that received the FLOGI response 144742e9a92fSRobert Love * 144842e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 14493a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 145042e9a92fSRobert Love * and then unlock the lport. 145142e9a92fSRobert Love */ 145211b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 145342e9a92fSRobert Love void *lp_arg) 145442e9a92fSRobert Love { 145542e9a92fSRobert Love struct fc_lport *lport = lp_arg; 145642e9a92fSRobert Love struct fc_els_flogi *flp; 145742e9a92fSRobert Love u32 did; 145842e9a92fSRobert Love u16 csp_flags; 145942e9a92fSRobert Love unsigned int r_a_tov; 146042e9a92fSRobert Love unsigned int e_d_tov; 146142e9a92fSRobert Love u16 mfs; 146242e9a92fSRobert Love 1463f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1464f657d299SJoe Eykholt 146542e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 146642e9a92fSRobert Love return; 146742e9a92fSRobert Love 146842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 146942e9a92fSRobert Love 147042e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 14717414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 14727414705eSRobert Love "%s\n", fc_lport_state(lport)); 147376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 147476f6804eSAbhijeet Joglekar goto err; 147542e9a92fSRobert Love goto out; 147642e9a92fSRobert Love } 147742e9a92fSRobert Love 147876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 147976f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 148076f6804eSAbhijeet Joglekar goto err; 148176f6804eSAbhijeet Joglekar } 148276f6804eSAbhijeet Joglekar 1483251748a9SJoe Eykholt did = fc_frame_did(fp); 148442e9a92fSRobert Love if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { 148542e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 148642e9a92fSRobert Love if (flp) { 148742e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 148842e9a92fSRobert Love FC_SP_BB_DATA_MASK; 148942e9a92fSRobert Love if (mfs >= FC_SP_MIN_MAX_PAYLOAD && 149042e9a92fSRobert Love mfs < lport->mfs) 149142e9a92fSRobert Love lport->mfs = mfs; 149242e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 149342e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 149442e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 149542e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 149642e9a92fSRobert Love e_d_tov /= 1000000; 1497db36c06cSChris Leech 1498db36c06cSChris Leech lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); 1499db36c06cSChris Leech 150042e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 150142e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 150242e9a92fSRobert Love lport->e_d_tov = e_d_tov; 150342e9a92fSRobert Love lport->r_a_tov = 2 * e_d_tov; 1504093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 1505e6d8a1b0SJoe Eykholt printk(KERN_INFO "host%d: libfc: " 1506ce8b5df0SChris Leech "Port (%6.6x) entered " 1507e6d8a1b0SJoe Eykholt "point-to-point mode\n", 1508e6d8a1b0SJoe Eykholt lport->host->host_no, did); 1509251748a9SJoe Eykholt fc_lport_ptp_setup(lport, fc_frame_sid(fp), 151042e9a92fSRobert Love get_unaligned_be64( 151142e9a92fSRobert Love &flp->fl_wwpn), 151242e9a92fSRobert Love get_unaligned_be64( 151342e9a92fSRobert Love &flp->fl_wwnn)); 151442e9a92fSRobert Love } else { 151542e9a92fSRobert Love lport->e_d_tov = e_d_tov; 151642e9a92fSRobert Love lport->r_a_tov = r_a_tov; 151742e9a92fSRobert Love fc_host_fabric_name(lport->host) = 151842e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 1519093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 152042e9a92fSRobert Love fc_lport_enter_dns(lport); 152142e9a92fSRobert Love } 152242e9a92fSRobert Love } 152342e9a92fSRobert Love } else { 15247414705eSRobert Love FC_LPORT_DBG(lport, "Bad FLOGI response\n"); 152542e9a92fSRobert Love } 152642e9a92fSRobert Love 152742e9a92fSRobert Love out: 152842e9a92fSRobert Love fc_frame_free(fp); 152942e9a92fSRobert Love err: 153042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 153142e9a92fSRobert Love } 153211b56188SChris Leech EXPORT_SYMBOL(fc_lport_flogi_resp); 153342e9a92fSRobert Love 153442e9a92fSRobert Love /** 153534f42a07SRobert Love * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager 153642e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 153742e9a92fSRobert Love * 153842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 153942e9a92fSRobert Love * this routine. 154042e9a92fSRobert Love */ 154142e9a92fSRobert Love void fc_lport_enter_flogi(struct fc_lport *lport) 154242e9a92fSRobert Love { 154342e9a92fSRobert Love struct fc_frame *fp; 154442e9a92fSRobert Love 15457414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 15467414705eSRobert Love fc_lport_state(lport)); 154742e9a92fSRobert Love 154842e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 154942e9a92fSRobert Love 15503726f358SJoe Eykholt if (lport->point_to_multipoint) { 15513726f358SJoe Eykholt if (lport->port_id) 15523726f358SJoe Eykholt fc_lport_enter_ready(lport); 15533726f358SJoe Eykholt return; 15543726f358SJoe Eykholt } 15553726f358SJoe Eykholt 155642e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 155742e9a92fSRobert Love if (!fp) 155842e9a92fSRobert Love return fc_lport_error(lport, fp); 155942e9a92fSRobert Love 1560db36c06cSChris Leech if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, 1561db36c06cSChris Leech lport->vport ? ELS_FDISC : ELS_FLOGI, 1562b94f8951SJoe Eykholt fc_lport_flogi_resp, lport, 1563b94f8951SJoe Eykholt lport->vport ? 2 * lport->r_a_tov : 1564b94f8951SJoe Eykholt lport->e_d_tov)) 15658f550f93SChris Leech fc_lport_error(lport, NULL); 156642e9a92fSRobert Love } 156742e9a92fSRobert Love 15683a3b42bfSRobert Love /** 15693a3b42bfSRobert Love * fc_lport_config() - Configure a fc_lport 15703a3b42bfSRobert Love * @lport: The local port to be configured 15713a3b42bfSRobert Love */ 157242e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 157342e9a92fSRobert Love { 157442e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 157542e9a92fSRobert Love mutex_init(&lport->lp_mutex); 157642e9a92fSRobert Love 1577b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 157842e9a92fSRobert Love 157942e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 158042e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 158142e9a92fSRobert Love 158242e9a92fSRobert Love return 0; 158342e9a92fSRobert Love } 158442e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 158542e9a92fSRobert Love 15863a3b42bfSRobert Love /** 15873a3b42bfSRobert Love * fc_lport_init() - Initialize the lport layer for a local port 15883a3b42bfSRobert Love * @lport: The local port to initialize the exchange layer for 15893a3b42bfSRobert Love */ 159042e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 159142e9a92fSRobert Love { 159242e9a92fSRobert Love if (!lport->tt.lport_recv) 159342e9a92fSRobert Love lport->tt.lport_recv = fc_lport_recv_req; 159442e9a92fSRobert Love 159542e9a92fSRobert Love if (!lport->tt.lport_reset) 159642e9a92fSRobert Love lport->tt.lport_reset = fc_lport_reset; 159742e9a92fSRobert Love 159842e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 159942e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 160042e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 160142e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 160242e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 160342e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 160442e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 160542e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 160642e9a92fSRobert Love 160742e9a92fSRobert Love /* This value is also unchanging */ 160842e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 160942e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 161042e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 161142e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 161242e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 161342e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 161442e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 161542e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 161642e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 161742e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 161842e9a92fSRobert Love 161942e9a92fSRobert Love return 0; 162042e9a92fSRobert Love } 162142e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1622a51ab396SSteve Ma 1623a51ab396SSteve Ma /** 16243a3b42bfSRobert Love * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests 16253a3b42bfSRobert Love * @sp: The sequence for the FC Passthrough response 16263a3b42bfSRobert Love * @fp: The response frame 16273a3b42bfSRobert Love * @info_arg: The BSG info that the response is for 1628a51ab396SSteve Ma */ 1629a51ab396SSteve Ma static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, 1630a51ab396SSteve Ma void *info_arg) 1631a51ab396SSteve Ma { 1632a51ab396SSteve Ma struct fc_bsg_info *info = info_arg; 1633a51ab396SSteve Ma struct fc_bsg_job *job = info->job; 1634a51ab396SSteve Ma struct fc_lport *lport = info->lport; 1635a51ab396SSteve Ma struct fc_frame_header *fh; 1636a51ab396SSteve Ma size_t len; 1637a51ab396SSteve Ma void *buf; 1638a51ab396SSteve Ma 1639a51ab396SSteve Ma if (IS_ERR(fp)) { 1640a51ab396SSteve Ma job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? 1641a51ab396SSteve Ma -ECONNABORTED : -ETIMEDOUT; 1642a51ab396SSteve Ma job->reply_len = sizeof(uint32_t); 1643a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1644a51ab396SSteve Ma job->job_done(job); 1645a51ab396SSteve Ma kfree(info); 1646a51ab396SSteve Ma return; 1647a51ab396SSteve Ma } 1648a51ab396SSteve Ma 1649a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1650a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1651a51ab396SSteve Ma len = fr_len(fp) - sizeof(*fh); 1652a51ab396SSteve Ma buf = fc_frame_payload_get(fp, 0); 1653a51ab396SSteve Ma 1654a51ab396SSteve Ma if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { 1655a51ab396SSteve Ma /* Get the response code from the first frame payload */ 1656a51ab396SSteve Ma unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? 1657a51ab396SSteve Ma ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : 1658a51ab396SSteve Ma (unsigned short)fc_frame_payload_op(fp); 1659a51ab396SSteve Ma 1660a51ab396SSteve Ma /* Save the reply status of the job */ 1661a51ab396SSteve Ma job->reply->reply_data.ctels_reply.status = 1662a51ab396SSteve Ma (cmd == info->rsp_code) ? 1663a51ab396SSteve Ma FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; 1664a51ab396SSteve Ma } 1665a51ab396SSteve Ma 1666a51ab396SSteve Ma job->reply->reply_payload_rcv_len += 1667a51ab396SSteve Ma fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, 1668a51ab396SSteve Ma &info->offset, KM_BIO_SRC_IRQ, NULL); 1669a51ab396SSteve Ma 1670a51ab396SSteve Ma if (fr_eof(fp) == FC_EOF_T && 1671a51ab396SSteve Ma (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == 1672a51ab396SSteve Ma (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { 1673a51ab396SSteve Ma if (job->reply->reply_payload_rcv_len > 1674a51ab396SSteve Ma job->reply_payload.payload_len) 1675a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 1676a51ab396SSteve Ma job->reply_payload.payload_len; 1677a51ab396SSteve Ma job->reply->result = 0; 1678a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1679a51ab396SSteve Ma job->job_done(job); 1680a51ab396SSteve Ma kfree(info); 1681a51ab396SSteve Ma } 1682a51ab396SSteve Ma fc_frame_free(fp); 1683a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1684a51ab396SSteve Ma } 1685a51ab396SSteve Ma 1686a51ab396SSteve Ma /** 16873a3b42bfSRobert Love * fc_lport_els_request() - Send ELS passthrough request 16883a3b42bfSRobert Love * @job: The BSG Passthrough job 1689a51ab396SSteve Ma * @lport: The local port sending the request 16903a3b42bfSRobert Love * @did: The destination port id 1691a51ab396SSteve Ma * 1692a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1693a51ab396SSteve Ma * this routine. 1694a51ab396SSteve Ma */ 1695a51ab396SSteve Ma static int fc_lport_els_request(struct fc_bsg_job *job, 1696a51ab396SSteve Ma struct fc_lport *lport, 1697a51ab396SSteve Ma u32 did, u32 tov) 1698a51ab396SSteve Ma { 1699a51ab396SSteve Ma struct fc_bsg_info *info; 1700a51ab396SSteve Ma struct fc_frame *fp; 1701a51ab396SSteve Ma struct fc_frame_header *fh; 1702a51ab396SSteve Ma char *pp; 1703a51ab396SSteve Ma int len; 1704a51ab396SSteve Ma 170570d919fbSYi Zou fp = fc_frame_alloc(lport, job->request_payload.payload_len); 1706a51ab396SSteve Ma if (!fp) 1707a51ab396SSteve Ma return -ENOMEM; 1708a51ab396SSteve Ma 1709a51ab396SSteve Ma len = job->request_payload.payload_len; 1710a51ab396SSteve Ma pp = fc_frame_payload_get(fp, len); 1711a51ab396SSteve Ma 1712a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1713a51ab396SSteve Ma job->request_payload.sg_cnt, 1714a51ab396SSteve Ma pp, len); 1715a51ab396SSteve Ma 1716a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1717a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_ELS_REQ; 1718a51ab396SSteve Ma hton24(fh->fh_d_id, did); 17197b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1720a51ab396SSteve Ma fh->fh_type = FC_TYPE_ELS; 172124f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 1722a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1723a51ab396SSteve Ma fh->fh_df_ctl = 0; 1724a51ab396SSteve Ma fh->fh_parm_offset = 0; 1725a51ab396SSteve Ma 1726a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1727a51ab396SSteve Ma if (!info) { 1728a51ab396SSteve Ma fc_frame_free(fp); 1729a51ab396SSteve Ma return -ENOMEM; 1730a51ab396SSteve Ma } 1731a51ab396SSteve Ma 1732a51ab396SSteve Ma info->job = job; 1733a51ab396SSteve Ma info->lport = lport; 1734a51ab396SSteve Ma info->rsp_code = ELS_LS_ACC; 1735a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1736a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1737a51ab396SSteve Ma 1738a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1739a51ab396SSteve Ma NULL, info, tov)) 1740a51ab396SSteve Ma return -ECOMM; 1741a51ab396SSteve Ma return 0; 1742a51ab396SSteve Ma } 1743a51ab396SSteve Ma 1744a51ab396SSteve Ma /** 17453a3b42bfSRobert Love * fc_lport_ct_request() - Send CT Passthrough request 17463a3b42bfSRobert Love * @job: The BSG Passthrough job 1747a51ab396SSteve Ma * @lport: The local port sending the request 1748a51ab396SSteve Ma * @did: The destination FC-ID 17493a3b42bfSRobert Love * @tov: The timeout period to wait for the response 1750a51ab396SSteve Ma * 1751a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1752a51ab396SSteve Ma * this routine. 1753a51ab396SSteve Ma */ 1754a51ab396SSteve Ma static int fc_lport_ct_request(struct fc_bsg_job *job, 1755a51ab396SSteve Ma struct fc_lport *lport, u32 did, u32 tov) 1756a51ab396SSteve Ma { 1757a51ab396SSteve Ma struct fc_bsg_info *info; 1758a51ab396SSteve Ma struct fc_frame *fp; 1759a51ab396SSteve Ma struct fc_frame_header *fh; 1760a51ab396SSteve Ma struct fc_ct_req *ct; 1761a51ab396SSteve Ma size_t len; 1762a51ab396SSteve Ma 1763a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 1764a51ab396SSteve Ma job->request_payload.payload_len); 1765a51ab396SSteve Ma if (!fp) 1766a51ab396SSteve Ma return -ENOMEM; 1767a51ab396SSteve Ma 1768a51ab396SSteve Ma len = job->request_payload.payload_len; 1769a51ab396SSteve Ma ct = fc_frame_payload_get(fp, len); 1770a51ab396SSteve Ma 1771a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1772a51ab396SSteve Ma job->request_payload.sg_cnt, 1773a51ab396SSteve Ma ct, len); 1774a51ab396SSteve Ma 1775a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1776a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; 1777a51ab396SSteve Ma hton24(fh->fh_d_id, did); 17787b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1779a51ab396SSteve Ma fh->fh_type = FC_TYPE_CT; 178024f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 1781a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1782a51ab396SSteve Ma fh->fh_df_ctl = 0; 1783a51ab396SSteve Ma fh->fh_parm_offset = 0; 1784a51ab396SSteve Ma 1785a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1786a51ab396SSteve Ma if (!info) { 1787a51ab396SSteve Ma fc_frame_free(fp); 1788a51ab396SSteve Ma return -ENOMEM; 1789a51ab396SSteve Ma } 1790a51ab396SSteve Ma 1791a51ab396SSteve Ma info->job = job; 1792a51ab396SSteve Ma info->lport = lport; 1793a51ab396SSteve Ma info->rsp_code = FC_FS_ACC; 1794a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1795a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1796a51ab396SSteve Ma 1797a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1798a51ab396SSteve Ma NULL, info, tov)) 1799a51ab396SSteve Ma return -ECOMM; 1800a51ab396SSteve Ma return 0; 1801a51ab396SSteve Ma } 1802a51ab396SSteve Ma 1803a51ab396SSteve Ma /** 1804a51ab396SSteve Ma * fc_lport_bsg_request() - The common entry point for sending 18053a3b42bfSRobert Love * FC Passthrough requests 18063a3b42bfSRobert Love * @job: The BSG passthrough job 1807a51ab396SSteve Ma */ 1808a51ab396SSteve Ma int fc_lport_bsg_request(struct fc_bsg_job *job) 1809a51ab396SSteve Ma { 1810a51ab396SSteve Ma struct request *rsp = job->req->next_rq; 1811a51ab396SSteve Ma struct Scsi_Host *shost = job->shost; 1812a51ab396SSteve Ma struct fc_lport *lport = shost_priv(shost); 1813a51ab396SSteve Ma struct fc_rport *rport; 1814a51ab396SSteve Ma struct fc_rport_priv *rdata; 1815a51ab396SSteve Ma int rc = -EINVAL; 1816a51ab396SSteve Ma u32 did; 1817a51ab396SSteve Ma 1818a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 0; 1819b248df30SHugh Daschbach if (rsp) 1820a51ab396SSteve Ma rsp->resid_len = job->reply_payload.payload_len; 1821a51ab396SSteve Ma 1822a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1823a51ab396SSteve Ma 1824a51ab396SSteve Ma switch (job->request->msgcode) { 1825a51ab396SSteve Ma case FC_BSG_RPT_ELS: 1826a51ab396SSteve Ma rport = job->rport; 1827a51ab396SSteve Ma if (!rport) 1828a51ab396SSteve Ma break; 1829a51ab396SSteve Ma 1830a51ab396SSteve Ma rdata = rport->dd_data; 1831a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, rport->port_id, 1832a51ab396SSteve Ma rdata->e_d_tov); 1833a51ab396SSteve Ma break; 1834a51ab396SSteve Ma 1835a51ab396SSteve Ma case FC_BSG_RPT_CT: 1836a51ab396SSteve Ma rport = job->rport; 1837a51ab396SSteve Ma if (!rport) 1838a51ab396SSteve Ma break; 1839a51ab396SSteve Ma 1840a51ab396SSteve Ma rdata = rport->dd_data; 1841a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, rport->port_id, 1842a51ab396SSteve Ma rdata->e_d_tov); 1843a51ab396SSteve Ma break; 1844a51ab396SSteve Ma 1845a51ab396SSteve Ma case FC_BSG_HST_CT: 1846a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_ct.port_id); 1847a51ab396SSteve Ma if (did == FC_FID_DIR_SERV) 18483a3b42bfSRobert Love rdata = lport->dns_rdata; 1849a51ab396SSteve Ma else 1850a51ab396SSteve Ma rdata = lport->tt.rport_lookup(lport, did); 1851a51ab396SSteve Ma 1852a51ab396SSteve Ma if (!rdata) 1853a51ab396SSteve Ma break; 1854a51ab396SSteve Ma 1855a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); 1856a51ab396SSteve Ma break; 1857a51ab396SSteve Ma 1858a51ab396SSteve Ma case FC_BSG_HST_ELS_NOLOGIN: 1859a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_els.port_id); 1860a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); 1861a51ab396SSteve Ma break; 1862a51ab396SSteve Ma } 1863a51ab396SSteve Ma 1864a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1865a51ab396SSteve Ma return rc; 1866a51ab396SSteve Ma } 1867a51ab396SSteve Ma EXPORT_SYMBOL(fc_lport_bsg_request); 1868