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 * 35732bee7aSUwe Kleine-König * HIERARCHY 3642e9a92fSRobert Love * 37732bee7aSUwe Kleine-König * The following hierarchy defines the locking rules. A greater lock 3842e9a92fSRobert Love * may be held before acquiring a lesser lock, but a lesser lock should never 39732bee7aSUwe Kleine-König * be held while attempting to acquire a greater lock. Here is the hierarchy- 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 struct fc_exch *ep = fc_seq_exch(sp); 40942e9a92fSRobert Love unsigned int len; 41042e9a92fSRobert Love void *pp; 41142e9a92fSRobert Love void *dp; 41242e9a92fSRobert Love u32 f_ctl; 41342e9a92fSRobert Love 4141b69bc06SJoe Eykholt FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", 41542e9a92fSRobert Love fc_lport_state(lport)); 41642e9a92fSRobert Love 41742e9a92fSRobert Love len = fr_len(in_fp) - sizeof(struct fc_frame_header); 41842e9a92fSRobert Love pp = fc_frame_payload_get(in_fp, len); 41942e9a92fSRobert Love 42042e9a92fSRobert Love if (len < sizeof(__be32)) 42142e9a92fSRobert Love len = sizeof(__be32); 42242e9a92fSRobert Love 42342e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 42442e9a92fSRobert Love if (fp) { 42542e9a92fSRobert Love dp = fc_frame_payload_get(fp, len); 42642e9a92fSRobert Love memcpy(dp, pp, len); 4271b69bc06SJoe Eykholt *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); 42842e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 42942e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 43042e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 43142e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 43242e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 43342e9a92fSRobert Love } 43442e9a92fSRobert Love fc_frame_free(in_fp); 43542e9a92fSRobert Love } 43642e9a92fSRobert Love 43742e9a92fSRobert Love /** 4381b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 4391b69bc06SJoe Eykholt * @sp: The sequence in the RNID exchange 4401b69bc06SJoe Eykholt * @fp: The RNID request frame 4411b69bc06SJoe Eykholt * @lport: The local port recieving the RNID 44242e9a92fSRobert Love * 4431b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 44442e9a92fSRobert Love * this function. 44542e9a92fSRobert Love */ 44642e9a92fSRobert Love static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, 44742e9a92fSRobert Love struct fc_lport *lport) 44842e9a92fSRobert Love { 44942e9a92fSRobert Love struct fc_frame *fp; 45042e9a92fSRobert Love struct fc_exch *ep = fc_seq_exch(sp); 45142e9a92fSRobert Love struct fc_els_rnid *req; 45242e9a92fSRobert Love struct { 45342e9a92fSRobert Love struct fc_els_rnid_resp rnid; 45442e9a92fSRobert Love struct fc_els_rnid_cid cid; 45542e9a92fSRobert Love struct fc_els_rnid_gen gen; 45642e9a92fSRobert Love } *rp; 45742e9a92fSRobert Love struct fc_seq_els_data rjt_data; 45842e9a92fSRobert Love u8 fmt; 45942e9a92fSRobert Love size_t len; 46042e9a92fSRobert Love u32 f_ctl; 46142e9a92fSRobert Love 4627414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 46342e9a92fSRobert Love fc_lport_state(lport)); 46442e9a92fSRobert Love 46542e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 46642e9a92fSRobert Love if (!req) { 46742e9a92fSRobert Love rjt_data.fp = NULL; 46842e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 46942e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 47042e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); 47142e9a92fSRobert Love } else { 47242e9a92fSRobert Love fmt = req->rnid_fmt; 47342e9a92fSRobert Love len = sizeof(*rp); 47442e9a92fSRobert Love if (fmt != ELS_RNIDF_GEN || 47542e9a92fSRobert Love ntohl(lport->rnid_gen.rnid_atype) == 0) { 47642e9a92fSRobert Love fmt = ELS_RNIDF_NONE; /* nothing to provide */ 47742e9a92fSRobert Love len -= sizeof(rp->gen); 47842e9a92fSRobert Love } 47942e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 48042e9a92fSRobert Love if (fp) { 48142e9a92fSRobert Love rp = fc_frame_payload_get(fp, len); 48242e9a92fSRobert Love memset(rp, 0, len); 48342e9a92fSRobert Love rp->rnid.rnid_cmd = ELS_LS_ACC; 48442e9a92fSRobert Love rp->rnid.rnid_fmt = fmt; 48542e9a92fSRobert Love rp->rnid.rnid_cid_len = sizeof(rp->cid); 48642e9a92fSRobert Love rp->cid.rnid_wwpn = htonll(lport->wwpn); 48742e9a92fSRobert Love rp->cid.rnid_wwnn = htonll(lport->wwnn); 48842e9a92fSRobert Love if (fmt == ELS_RNIDF_GEN) { 48942e9a92fSRobert Love rp->rnid.rnid_sid_len = sizeof(rp->gen); 49042e9a92fSRobert Love memcpy(&rp->gen, &lport->rnid_gen, 49142e9a92fSRobert Love sizeof(rp->gen)); 49242e9a92fSRobert Love } 49342e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 49442e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; 49542e9a92fSRobert Love f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; 49642e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 49742e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 49842e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 49942e9a92fSRobert Love } 50042e9a92fSRobert Love } 50142e9a92fSRobert Love fc_frame_free(in_fp); 50242e9a92fSRobert Love } 50342e9a92fSRobert Love 50442e9a92fSRobert Love /** 50534f42a07SRobert Love * fc_lport_recv_logo_req() - Handle received fabric LOGO request 5063a3b42bfSRobert Love * @sp: The sequence in the LOGO exchange 5073a3b42bfSRobert Love * @fp: The LOGO request frame 5083a3b42bfSRobert Love * @lport: The local port recieving the LOGO 50942e9a92fSRobert Love * 51042e9a92fSRobert Love * Locking Note: The lport lock is exected to be held before calling 51142e9a92fSRobert Love * this function. 51242e9a92fSRobert Love */ 51342e9a92fSRobert Love static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, 51442e9a92fSRobert Love struct fc_lport *lport) 51542e9a92fSRobert Love { 51642e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 51742e9a92fSRobert Love fc_lport_enter_reset(lport); 51842e9a92fSRobert Love fc_frame_free(fp); 51942e9a92fSRobert Love } 52042e9a92fSRobert Love 52142e9a92fSRobert Love /** 52234f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 5233a3b42bfSRobert Love * @lport: The local port that should log into the fabric 52442e9a92fSRobert Love * 52542e9a92fSRobert Love * Locking Note: This function should not be called 52642e9a92fSRobert Love * with the lport lock held. 52742e9a92fSRobert Love */ 52842e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 52942e9a92fSRobert Love { 53042e9a92fSRobert Love int rc = -1; 53142e9a92fSRobert Love 53242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 53355a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || 53455a66d3cSVasu Dev lport->state == LPORT_ST_LOGO) { 53555a66d3cSVasu Dev fc_lport_state_enter(lport, LPORT_ST_RESET); 53642e9a92fSRobert Love fc_lport_enter_reset(lport); 53742e9a92fSRobert Love rc = 0; 53842e9a92fSRobert Love } 53942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 54042e9a92fSRobert Love 54142e9a92fSRobert Love return rc; 54242e9a92fSRobert Love } 54342e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 54442e9a92fSRobert Love 54542e9a92fSRobert Love /** 5468faecddbSChris Leech * __fc_linkup() - Handler for transport linkup events 5478faecddbSChris Leech * @lport: The lport whose link is up 5488faecddbSChris Leech * 5498faecddbSChris Leech * Locking: must be called with the lp_mutex held 5508faecddbSChris Leech */ 5518faecddbSChris Leech void __fc_linkup(struct fc_lport *lport) 5528faecddbSChris Leech { 5538faecddbSChris Leech if (!lport->link_up) { 5548faecddbSChris Leech lport->link_up = 1; 5558faecddbSChris Leech 5568faecddbSChris Leech if (lport->state == LPORT_ST_RESET) 5578faecddbSChris Leech fc_lport_enter_flogi(lport); 5588faecddbSChris Leech } 5598faecddbSChris Leech } 5608faecddbSChris Leech 5618faecddbSChris Leech /** 56234f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 5633a3b42bfSRobert Love * @lport: The local port whose link is up 56442e9a92fSRobert Love */ 56542e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 56642e9a92fSRobert Love { 567ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", 5687b2787ecSRobert Love lport->host->host_no, lport->port_id); 56942e9a92fSRobert Love 57042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5718faecddbSChris Leech __fc_linkup(lport); 57242e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 57342e9a92fSRobert Love } 57442e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 57542e9a92fSRobert Love 57642e9a92fSRobert Love /** 5778faecddbSChris Leech * __fc_linkdown() - Handler for transport linkdown events 5788faecddbSChris Leech * @lport: The lport whose link is down 5798faecddbSChris Leech * 5808faecddbSChris Leech * Locking: must be called with the lp_mutex held 5818faecddbSChris Leech */ 5828faecddbSChris Leech void __fc_linkdown(struct fc_lport *lport) 5838faecddbSChris Leech { 5848faecddbSChris Leech if (lport->link_up) { 5858faecddbSChris Leech lport->link_up = 0; 5868faecddbSChris Leech fc_lport_enter_reset(lport); 5878faecddbSChris Leech lport->tt.fcp_cleanup(lport); 5888faecddbSChris Leech } 5898faecddbSChris Leech } 5908faecddbSChris Leech 5918faecddbSChris Leech /** 59234f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 5933a3b42bfSRobert Love * @lport: The local port whose link is down 59442e9a92fSRobert Love */ 59542e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 59642e9a92fSRobert Love { 597ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", 5987b2787ecSRobert Love lport->host->host_no, lport->port_id); 59942e9a92fSRobert Love 6008faecddbSChris Leech mutex_lock(&lport->lp_mutex); 6018faecddbSChris Leech __fc_linkdown(lport); 60242e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 60342e9a92fSRobert Love } 60442e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 60542e9a92fSRobert Love 60642e9a92fSRobert Love /** 60734f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 6083a3b42bfSRobert Love * @lport: The local port to logoff the fabric 60942e9a92fSRobert Love * 61042e9a92fSRobert Love * Return value: 61142e9a92fSRobert Love * 0 for success, -1 for failure 61234f42a07SRobert Love */ 61342e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 61442e9a92fSRobert Love { 61542e9a92fSRobert Love lport->tt.disc_stop_final(lport); 61642e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 6173a3b42bfSRobert Love if (lport->dns_rdata) 6183a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 619a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 620a0fd2e49SAbhijeet Joglekar lport->tt.rport_flush_queue(); 621a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 62242e9a92fSRobert Love fc_lport_enter_logo(lport); 62342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 624f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 62542e9a92fSRobert Love return 0; 62642e9a92fSRobert Love } 62742e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 62842e9a92fSRobert Love 62942e9a92fSRobert Love /** 6303a3b42bfSRobert Love * fc_lport_destroy() - Unregister a fc_lport 6313a3b42bfSRobert Love * @lport: The local port to unregister 63242e9a92fSRobert Love * 63342e9a92fSRobert Love * Note: 63442e9a92fSRobert Love * exit routine for fc_lport instance 63542e9a92fSRobert Love * clean-up all the allocated memory 63642e9a92fSRobert Love * and free up other system resources. 63742e9a92fSRobert Love * 63834f42a07SRobert Love */ 63942e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 64042e9a92fSRobert Love { 641bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 642b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 643bbf15669SAbhijeet Joglekar lport->link_up = 0; 64442e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 645bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 646bbf15669SAbhijeet Joglekar 64742e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 648e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 6491f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 65042e9a92fSRobert Love return 0; 65142e9a92fSRobert Love } 65242e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 65342e9a92fSRobert Love 65442e9a92fSRobert Love /** 6553a3b42bfSRobert Love * fc_set_mfs() - Set the maximum frame size for a local port 6563a3b42bfSRobert Love * @lport: The local port to set the MFS for 6573a3b42bfSRobert Love * @mfs: The new MFS 65834f42a07SRobert Love */ 65942e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 66042e9a92fSRobert Love { 66142e9a92fSRobert Love unsigned int old_mfs; 66242e9a92fSRobert Love int rc = -EINVAL; 66342e9a92fSRobert Love 66442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 66542e9a92fSRobert Love 66642e9a92fSRobert Love old_mfs = lport->mfs; 66742e9a92fSRobert Love 66842e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 66942e9a92fSRobert Love mfs &= ~3; 67042e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 67142e9a92fSRobert Love mfs = FC_MAX_FRAME; 67242e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 67342e9a92fSRobert Love lport->mfs = mfs; 67442e9a92fSRobert Love rc = 0; 67542e9a92fSRobert Love } 67642e9a92fSRobert Love 67742e9a92fSRobert Love if (!rc && mfs < old_mfs) 67842e9a92fSRobert Love fc_lport_enter_reset(lport); 67942e9a92fSRobert Love 68042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 68142e9a92fSRobert Love 68242e9a92fSRobert Love return rc; 68342e9a92fSRobert Love } 68442e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 68542e9a92fSRobert Love 68642e9a92fSRobert Love /** 68734f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 6883a3b42bfSRobert Love * @lport: The local port receiving the event 68942e9a92fSRobert Love * @event: The discovery event 69042e9a92fSRobert Love */ 69142e9a92fSRobert Love void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) 69242e9a92fSRobert Love { 69342e9a92fSRobert Love switch (event) { 69442e9a92fSRobert Love case DISC_EV_SUCCESS: 6957414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 69642e9a92fSRobert Love break; 69742e9a92fSRobert Love case DISC_EV_FAILED: 698e6d8a1b0SJoe Eykholt printk(KERN_ERR "host%d: libfc: " 699ce8b5df0SChris Leech "Discovery failed for port (%6.6x)\n", 7007b2787ecSRobert Love lport->host->host_no, lport->port_id); 70142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 70242e9a92fSRobert Love fc_lport_enter_reset(lport); 70342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 70442e9a92fSRobert Love break; 70542e9a92fSRobert Love case DISC_EV_NONE: 70642e9a92fSRobert Love WARN_ON(1); 70742e9a92fSRobert Love break; 70842e9a92fSRobert Love } 70942e9a92fSRobert Love } 71042e9a92fSRobert Love 71142e9a92fSRobert Love /** 71234f42a07SRobert Love * fc_rport_enter_ready() - Enter the ready state and start discovery 7133a3b42bfSRobert Love * @lport: The local port that is ready 71442e9a92fSRobert Love * 71542e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 71642e9a92fSRobert Love * this routine. 71742e9a92fSRobert Love */ 71842e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 71942e9a92fSRobert Love { 7207414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 7217414705eSRobert Love fc_lport_state(lport)); 72242e9a92fSRobert Love 72342e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 7248faecddbSChris Leech if (lport->vport) 7258faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); 7268faecddbSChris Leech fc_vports_linkchange(lport); 72742e9a92fSRobert Love 7283a3b42bfSRobert Love if (!lport->ptp_rdata) 72942e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 73042e9a92fSRobert Love } 73142e9a92fSRobert Love 73242e9a92fSRobert Love /** 733093bb6a2SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID 734093bb6a2SJoe Eykholt * @lport: The local port which will have its Port ID set. 735093bb6a2SJoe Eykholt * @port_id: The new port ID. 736093bb6a2SJoe Eykholt * @fp: The frame containing the incoming request, or NULL. 737093bb6a2SJoe Eykholt * 738093bb6a2SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 739093bb6a2SJoe Eykholt * this function. 740093bb6a2SJoe Eykholt */ 741093bb6a2SJoe Eykholt static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, 742093bb6a2SJoe Eykholt struct fc_frame *fp) 743093bb6a2SJoe Eykholt { 744093bb6a2SJoe Eykholt if (port_id) 745ce8b5df0SChris Leech printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", 746093bb6a2SJoe Eykholt lport->host->host_no, port_id); 747093bb6a2SJoe Eykholt 7487b2787ecSRobert Love lport->port_id = port_id; 7497b2787ecSRobert Love 7507b2787ecSRobert Love /* Update the fc_host */ 751093bb6a2SJoe Eykholt fc_host_port_id(lport->host) = port_id; 7527b2787ecSRobert Love 753093bb6a2SJoe Eykholt if (lport->tt.lport_set_port_id) 754093bb6a2SJoe Eykholt lport->tt.lport_set_port_id(lport, port_id, fp); 755093bb6a2SJoe Eykholt } 756093bb6a2SJoe Eykholt 757093bb6a2SJoe Eykholt /** 75834f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 75942e9a92fSRobert Love * @sp_in: The sequence the FLOGI is on 7603a3b42bfSRobert Love * @rx_fp: The FLOGI frame 7613a3b42bfSRobert Love * @lport: The local port that recieved the request 76242e9a92fSRobert Love * 76342e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 76442e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 76542e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 76642e9a92fSRobert Love * 7671b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 76842e9a92fSRobert Love * this function. 76942e9a92fSRobert Love */ 77042e9a92fSRobert Love static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, 77142e9a92fSRobert Love struct fc_frame *rx_fp, 77242e9a92fSRobert Love struct fc_lport *lport) 77342e9a92fSRobert Love { 77442e9a92fSRobert Love struct fc_frame *fp; 77542e9a92fSRobert Love struct fc_frame_header *fh; 77642e9a92fSRobert Love struct fc_seq *sp; 77742e9a92fSRobert Love struct fc_exch *ep; 77842e9a92fSRobert Love struct fc_els_flogi *flp; 77942e9a92fSRobert Love struct fc_els_flogi *new_flp; 78042e9a92fSRobert Love u64 remote_wwpn; 78142e9a92fSRobert Love u32 remote_fid; 78242e9a92fSRobert Love u32 local_fid; 78342e9a92fSRobert Love u32 f_ctl; 78442e9a92fSRobert Love 7857414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 78642e9a92fSRobert Love fc_lport_state(lport)); 78742e9a92fSRobert Love 78842e9a92fSRobert Love fh = fc_frame_header_get(rx_fp); 78942e9a92fSRobert Love remote_fid = ntoh24(fh->fh_s_id); 79042e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 79142e9a92fSRobert Love if (!flp) 79242e9a92fSRobert Love goto out; 79342e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 79442e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 795e6d8a1b0SJoe Eykholt printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " 7969f8f3aa6SChris Leech "with same WWPN %16.16llx\n", 797e6d8a1b0SJoe Eykholt lport->host->host_no, remote_wwpn); 79842e9a92fSRobert Love goto out; 79942e9a92fSRobert Love } 8009f8f3aa6SChris Leech FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); 80142e9a92fSRobert Love 80242e9a92fSRobert Love /* 80342e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 80442e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 80542e9a92fSRobert Love * But if so, both of us could end up with the same FID. 80642e9a92fSRobert Love */ 80742e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 80842e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 80942e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 81042e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 81142e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 81242e9a92fSRobert Love } else if (!remote_fid) { 81342e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 81442e9a92fSRobert Love } 81542e9a92fSRobert Love 816093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, local_fid, rx_fp); 81742e9a92fSRobert Love 81842e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 81942e9a92fSRobert Love if (fp) { 82042e9a92fSRobert Love sp = lport->tt.seq_start_next(fr_seq(rx_fp)); 82142e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 82242e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 82342e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 82442e9a92fSRobert Love 82542e9a92fSRobert Love /* 82642e9a92fSRobert Love * Send the response. If this fails, the originator should 82742e9a92fSRobert Love * repeat the sequence. 82842e9a92fSRobert Love */ 82942e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 83042e9a92fSRobert Love ep = fc_seq_exch(sp); 831ccfc3098SJoe Eykholt fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, remote_fid, local_fid, 83242e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 83342e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 83442e9a92fSRobert Love 83542e9a92fSRobert Love } else { 83642e9a92fSRobert Love fc_lport_error(lport, fp); 83742e9a92fSRobert Love } 83842e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 83942e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 84042e9a92fSRobert Love 84142e9a92fSRobert Love out: 84242e9a92fSRobert Love sp = fr_seq(rx_fp); 84342e9a92fSRobert Love fc_frame_free(rx_fp); 84442e9a92fSRobert Love } 84542e9a92fSRobert Love 84642e9a92fSRobert Love /** 84734f42a07SRobert Love * fc_lport_recv_req() - The generic lport request handler 8483a3b42bfSRobert Love * @lport: The local port that received the request 84942e9a92fSRobert Love * @sp: The sequence the request is on 8503a3b42bfSRobert Love * @fp: The request frame 85142e9a92fSRobert Love * 85242e9a92fSRobert Love * This function will see if the lport handles the request or 85342e9a92fSRobert Love * if an rport should handle the request. 85442e9a92fSRobert Love * 85542e9a92fSRobert Love * Locking Note: This function should not be called with the lport 85642e9a92fSRobert Love * lock held becuase it will grab the lock. 85742e9a92fSRobert Love */ 85842e9a92fSRobert Love static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, 85942e9a92fSRobert Love struct fc_frame *fp) 86042e9a92fSRobert Love { 86142e9a92fSRobert Love struct fc_frame_header *fh = fc_frame_header_get(fp); 86242e9a92fSRobert Love void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); 86342e9a92fSRobert Love 86442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 86542e9a92fSRobert Love 86642e9a92fSRobert Love /* 86742e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 86842e9a92fSRobert Love * RSCN here. These don't require a session. 86942e9a92fSRobert Love * Even if we had a session, it might not be ready. 87042e9a92fSRobert Love */ 871e9ba8b42SJoe Eykholt if (!lport->link_up) 872e9ba8b42SJoe Eykholt fc_frame_free(fp); 873e9ba8b42SJoe Eykholt else if (fh->fh_type == FC_TYPE_ELS && 874e9ba8b42SJoe Eykholt fh->fh_r_ctl == FC_RCTL_ELS_REQ) { 87542e9a92fSRobert Love /* 87642e9a92fSRobert Love * Check opcode. 87742e9a92fSRobert Love */ 878131203a1SJoe Eykholt recv = lport->tt.rport_recv_req; 87942e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 88042e9a92fSRobert Love case ELS_FLOGI: 88142e9a92fSRobert Love recv = fc_lport_recv_flogi_req; 88242e9a92fSRobert Love break; 88342e9a92fSRobert Love case ELS_LOGO: 88442e9a92fSRobert Love fh = fc_frame_header_get(fp); 88542e9a92fSRobert Love if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) 88642e9a92fSRobert Love recv = fc_lport_recv_logo_req; 88742e9a92fSRobert Love break; 88842e9a92fSRobert Love case ELS_RSCN: 88942e9a92fSRobert Love recv = lport->tt.disc_recv_req; 89042e9a92fSRobert Love break; 89142e9a92fSRobert Love case ELS_ECHO: 89242e9a92fSRobert Love recv = fc_lport_recv_echo_req; 89342e9a92fSRobert Love break; 89442e9a92fSRobert Love case ELS_RLIR: 89542e9a92fSRobert Love recv = fc_lport_recv_rlir_req; 89642e9a92fSRobert Love break; 89742e9a92fSRobert Love case ELS_RNID: 89842e9a92fSRobert Love recv = fc_lport_recv_rnid_req; 89942e9a92fSRobert Love break; 90042e9a92fSRobert Love } 90142e9a92fSRobert Love 90242e9a92fSRobert Love recv(sp, fp, lport); 90342e9a92fSRobert Love } else { 9047414705eSRobert Love FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", 9057414705eSRobert Love fr_eof(fp)); 90642e9a92fSRobert Love fc_frame_free(fp); 90742e9a92fSRobert Love } 90842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 90942e9a92fSRobert Love 91042e9a92fSRobert Love /* 91142e9a92fSRobert Love * The common exch_done for all request may not be good 91242e9a92fSRobert Love * if any request requires longer hold on exhange. XXX 91342e9a92fSRobert Love */ 91442e9a92fSRobert Love lport->tt.exch_done(sp); 91542e9a92fSRobert Love } 91642e9a92fSRobert Love 91742e9a92fSRobert Love /** 9183a3b42bfSRobert Love * fc_lport_reset() - Reset a local port 9193a3b42bfSRobert Love * @lport: The local port which should be reset 92042e9a92fSRobert Love * 92142e9a92fSRobert Love * Locking Note: This functions should not be called with the 92242e9a92fSRobert Love * lport lock held. 92342e9a92fSRobert Love */ 92442e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 92542e9a92fSRobert Love { 926f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 92742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 92842e9a92fSRobert Love fc_lport_enter_reset(lport); 92942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 93042e9a92fSRobert Love return 0; 93142e9a92fSRobert Love } 93242e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 93342e9a92fSRobert Love 93442e9a92fSRobert Love /** 9353a3b42bfSRobert Love * fc_lport_reset_locked() - Reset the local port w/ the lport lock held 9363a3b42bfSRobert Love * @lport: The local port to be reset 93742e9a92fSRobert Love * 93842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 93942e9a92fSRobert Love * this routine. 94042e9a92fSRobert Love */ 9411190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 94242e9a92fSRobert Love { 9433a3b42bfSRobert Love if (lport->dns_rdata) 9443a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 94542e9a92fSRobert Love 9462f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 9472f2ac4a0SJoe Eykholt lport->tt.rport_logoff(lport->ptp_rdata); 9482f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 9493a3b42bfSRobert Love lport->ptp_rdata = NULL; 9502f2ac4a0SJoe Eykholt } 95142e9a92fSRobert Love 95242e9a92fSRobert Love lport->tt.disc_stop(lport); 95342e9a92fSRobert Love 9541f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 95542e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 956093bb6a2SJoe Eykholt 9577b2787ecSRobert Love if (lport->port_id) 958093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, 0, NULL); 9591190d925SJoe Eykholt } 96042e9a92fSRobert Love 9611190d925SJoe Eykholt /** 9621190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 9633a3b42bfSRobert Love * @lport: The local port to be reset 9641190d925SJoe Eykholt * 9651190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9661190d925SJoe Eykholt * this routine. 9671190d925SJoe Eykholt */ 9681190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 9691190d925SJoe Eykholt { 9701190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 9711190d925SJoe Eykholt fc_lport_state(lport)); 9721190d925SJoe Eykholt 97355a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) 97455a66d3cSVasu Dev return; 97555a66d3cSVasu Dev 9768faecddbSChris Leech if (lport->vport) { 9778faecddbSChris Leech if (lport->link_up) 9788faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); 9798faecddbSChris Leech else 9808faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); 9818faecddbSChris Leech } 9821190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 9838faecddbSChris Leech fc_vports_linkchange(lport); 9841190d925SJoe Eykholt fc_lport_reset_locked(lport); 985bc0e17f6SVasu Dev if (lport->link_up) 98642e9a92fSRobert Love fc_lport_enter_flogi(lport); 98742e9a92fSRobert Love } 98842e9a92fSRobert Love 98942e9a92fSRobert Love /** 9903a3b42bfSRobert Love * fc_lport_enter_disabled() - Disable the local port 9913a3b42bfSRobert Love * @lport: The local port to be reset 9921190d925SJoe Eykholt * 9931190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9941190d925SJoe Eykholt * this routine. 9951190d925SJoe Eykholt */ 9961190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 9971190d925SJoe Eykholt { 9981190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 9991190d925SJoe Eykholt fc_lport_state(lport)); 10001190d925SJoe Eykholt 10011190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 10028faecddbSChris Leech fc_vports_linkchange(lport); 10031190d925SJoe Eykholt fc_lport_reset_locked(lport); 10041190d925SJoe Eykholt } 10051190d925SJoe Eykholt 10061190d925SJoe Eykholt /** 100734f42a07SRobert Love * fc_lport_error() - Handler for any errors 10083a3b42bfSRobert Love * @lport: The local port that the error was on 10093a3b42bfSRobert Love * @fp: The error code encoded in a frame pointer 101042e9a92fSRobert Love * 101142e9a92fSRobert Love * If the error was caused by a resource allocation failure 101242e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 101342e9a92fSRobert Love * after the e_d_tov time. 101442e9a92fSRobert Love */ 101542e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 101642e9a92fSRobert Love { 101742e9a92fSRobert Love unsigned long delay = 0; 10187414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 101942e9a92fSRobert Love PTR_ERR(fp), fc_lport_state(lport), 102042e9a92fSRobert Love lport->retry_count); 102142e9a92fSRobert Love 102242e9a92fSRobert Love if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { 102342e9a92fSRobert Love /* 102442e9a92fSRobert Love * Memory allocation failure, or the exchange timed out. 102542e9a92fSRobert Love * Retry after delay 102642e9a92fSRobert Love */ 102742e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 102842e9a92fSRobert Love lport->retry_count++; 102942e9a92fSRobert Love if (!fp) 103042e9a92fSRobert Love delay = msecs_to_jiffies(500); 103142e9a92fSRobert Love else 103242e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 103342e9a92fSRobert Love 103442e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 103542e9a92fSRobert Love } else { 103642e9a92fSRobert Love switch (lport->state) { 1037b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 103842e9a92fSRobert Love case LPORT_ST_READY: 103942e9a92fSRobert Love case LPORT_ST_RESET: 1040c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 10415baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1042c9866a54SChris Leech case LPORT_ST_RSPN_ID: 104342e9a92fSRobert Love case LPORT_ST_RFT_ID: 1044ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 104542e9a92fSRobert Love case LPORT_ST_SCR: 104642e9a92fSRobert Love case LPORT_ST_DNS: 104742e9a92fSRobert Love case LPORT_ST_FLOGI: 104842e9a92fSRobert Love case LPORT_ST_LOGO: 104942e9a92fSRobert Love fc_lport_enter_reset(lport); 105042e9a92fSRobert Love break; 105142e9a92fSRobert Love } 105242e9a92fSRobert Love } 105342e9a92fSRobert Love } 105442e9a92fSRobert Love } 105542e9a92fSRobert Love 105642e9a92fSRobert Love /** 10577cccc157SChris Leech * fc_lport_ns_resp() - Handle response to a name server 10587cccc157SChris Leech * registration exchange 10597cccc157SChris Leech * @sp: current sequence in exchange 106042e9a92fSRobert Love * @fp: response frame 106142e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 106242e9a92fSRobert Love * 106342e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 10643a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 106542e9a92fSRobert Love * and then unlock the lport. 106642e9a92fSRobert Love */ 10677cccc157SChris Leech static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, 106842e9a92fSRobert Love void *lp_arg) 106942e9a92fSRobert Love { 107042e9a92fSRobert Love struct fc_lport *lport = lp_arg; 107142e9a92fSRobert Love struct fc_frame_header *fh; 107242e9a92fSRobert Love struct fc_ct_hdr *ct; 107342e9a92fSRobert Love 10747cccc157SChris Leech FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); 1075f657d299SJoe Eykholt 107642e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 107742e9a92fSRobert Love return; 107842e9a92fSRobert Love 107942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 108042e9a92fSRobert Love 1081ab593b18SJoe Eykholt if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { 10827cccc157SChris Leech FC_LPORT_DBG(lport, "Received a name server response, " 10837cccc157SChris Leech "but in state %s\n", fc_lport_state(lport)); 108476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 108576f6804eSAbhijeet Joglekar goto err; 108642e9a92fSRobert Love goto out; 108742e9a92fSRobert Love } 108842e9a92fSRobert Love 108976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 109076f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 109176f6804eSAbhijeet Joglekar goto err; 109276f6804eSAbhijeet Joglekar } 109376f6804eSAbhijeet Joglekar 109442e9a92fSRobert Love fh = fc_frame_header_get(fp); 109542e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 109642e9a92fSRobert Love 109742e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 109842e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 109942e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 110042e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 11017cccc157SChris Leech switch (lport->state) { 11027cccc157SChris Leech case LPORT_ST_RNN_ID: 1103c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); 11047cccc157SChris Leech break; 11057cccc157SChris Leech case LPORT_ST_RSNN_NN: 1106c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); 11077cccc157SChris Leech break; 11087cccc157SChris Leech case LPORT_ST_RSPN_ID: 1109c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 11107cccc157SChris Leech break; 11117cccc157SChris Leech case LPORT_ST_RFT_ID: 1112ab593b18SJoe Eykholt fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); 1113ab593b18SJoe Eykholt break; 1114ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 11157cccc157SChris Leech fc_lport_enter_scr(lport); 11167cccc157SChris Leech break; 11177cccc157SChris Leech default: 11187cccc157SChris Leech /* should have already been caught by state checks */ 11197cccc157SChris Leech break; 11207cccc157SChris Leech } 1121c9c7bd7aSChris Leech else 1122c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1123c9c7bd7aSChris Leech out: 1124c9c7bd7aSChris Leech fc_frame_free(fp); 1125c9c7bd7aSChris Leech err: 1126c9c7bd7aSChris Leech mutex_unlock(&lport->lp_mutex); 1127c9c7bd7aSChris Leech } 1128c9c7bd7aSChris Leech 1129c9c7bd7aSChris Leech /** 113034f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 113142e9a92fSRobert Love * @sp: current sequence in SCR exchange 113242e9a92fSRobert Love * @fp: response frame 113342e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 113442e9a92fSRobert Love * 113542e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 113642e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 113742e9a92fSRobert Love * and then unlock the lport. 113842e9a92fSRobert Love */ 113942e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 114042e9a92fSRobert Love void *lp_arg) 114142e9a92fSRobert Love { 114242e9a92fSRobert Love struct fc_lport *lport = lp_arg; 114342e9a92fSRobert Love u8 op; 114442e9a92fSRobert Love 1145f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1146f657d299SJoe Eykholt 114742e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 114842e9a92fSRobert Love return; 114942e9a92fSRobert Love 115042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 115142e9a92fSRobert Love 115242e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 11537414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 11547414705eSRobert Love "%s\n", fc_lport_state(lport)); 115576f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 115676f6804eSAbhijeet Joglekar goto err; 115742e9a92fSRobert Love goto out; 115842e9a92fSRobert Love } 115942e9a92fSRobert Love 116076f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 116176f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 116276f6804eSAbhijeet Joglekar goto err; 116376f6804eSAbhijeet Joglekar } 116476f6804eSAbhijeet Joglekar 116542e9a92fSRobert Love op = fc_frame_payload_op(fp); 116642e9a92fSRobert Love if (op == ELS_LS_ACC) 116742e9a92fSRobert Love fc_lport_enter_ready(lport); 116842e9a92fSRobert Love else 116942e9a92fSRobert Love fc_lport_error(lport, fp); 117042e9a92fSRobert Love 117142e9a92fSRobert Love out: 117242e9a92fSRobert Love fc_frame_free(fp); 117342e9a92fSRobert Love err: 117442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 117542e9a92fSRobert Love } 117642e9a92fSRobert Love 117742e9a92fSRobert Love /** 11783a3b42bfSRobert Love * fc_lport_enter_scr() - Send a SCR (State Change Register) request 11793a3b42bfSRobert Love * @lport: The local port to register for state changes 118042e9a92fSRobert Love * 118142e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 118242e9a92fSRobert Love * this routine. 118342e9a92fSRobert Love */ 118442e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 118542e9a92fSRobert Love { 118642e9a92fSRobert Love struct fc_frame *fp; 118742e9a92fSRobert Love 11887414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 11897414705eSRobert Love fc_lport_state(lport)); 119042e9a92fSRobert Love 119142e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 119242e9a92fSRobert Love 119342e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 119442e9a92fSRobert Love if (!fp) { 119542e9a92fSRobert Love fc_lport_error(lport, fp); 119642e9a92fSRobert Love return; 119742e9a92fSRobert Love } 119842e9a92fSRobert Love 1199a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 1200b94f8951SJoe Eykholt fc_lport_scr_resp, lport, 1201b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 12028f550f93SChris Leech fc_lport_error(lport, NULL); 120342e9a92fSRobert Love } 120442e9a92fSRobert Love 120542e9a92fSRobert Love /** 1206c914f7d1SChris Leech * fc_lport_enter_ns() - register some object with the name server 120742e9a92fSRobert Love * @lport: Fibre Channel local port to register 120842e9a92fSRobert Love * 120942e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 121042e9a92fSRobert Love * this routine. 121142e9a92fSRobert Love */ 1212c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) 121342e9a92fSRobert Love { 121442e9a92fSRobert Love struct fc_frame *fp; 1215c914f7d1SChris Leech enum fc_ns_req cmd; 1216c914f7d1SChris Leech int size = sizeof(struct fc_ct_hdr); 1217c914f7d1SChris Leech size_t len; 121842e9a92fSRobert Love 1219c914f7d1SChris Leech FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1220c914f7d1SChris Leech fc_lport_state_names[state], 12217414705eSRobert Love fc_lport_state(lport)); 122242e9a92fSRobert Love 1223c914f7d1SChris Leech fc_lport_state_enter(lport, state); 122442e9a92fSRobert Love 1225c914f7d1SChris Leech switch (state) { 1226c914f7d1SChris Leech case LPORT_ST_RNN_ID: 1227c914f7d1SChris Leech cmd = FC_NS_RNN_ID; 1228c914f7d1SChris Leech size += sizeof(struct fc_ns_rn_id); 122942e9a92fSRobert Love break; 1230c914f7d1SChris Leech case LPORT_ST_RSNN_NN: 1231c9866a54SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1232c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1233c914f7d1SChris Leech if (!len) 1234c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1235c914f7d1SChris Leech cmd = FC_NS_RSNN_NN; 1236c914f7d1SChris Leech size += sizeof(struct fc_ns_rsnn) + len; 1237c914f7d1SChris Leech break; 1238c914f7d1SChris Leech case LPORT_ST_RSPN_ID: 12395baa17c3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1240c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1241c914f7d1SChris Leech if (!len) 1242c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1243c914f7d1SChris Leech cmd = FC_NS_RSPN_ID; 1244c914f7d1SChris Leech size += sizeof(struct fc_ns_rspn) + len; 1245c914f7d1SChris Leech break; 1246c914f7d1SChris Leech case LPORT_ST_RFT_ID: 1247c914f7d1SChris Leech cmd = FC_NS_RFT_ID; 1248c914f7d1SChris Leech size += sizeof(struct fc_ns_rft); 1249c914f7d1SChris Leech break; 1250ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1251ab593b18SJoe Eykholt cmd = FC_NS_RFF_ID; 1252ab593b18SJoe Eykholt size += sizeof(struct fc_ns_rff_id); 1253ab593b18SJoe Eykholt break; 1254c914f7d1SChris Leech default: 1255c914f7d1SChris Leech fc_lport_error(lport, NULL); 1256c914f7d1SChris Leech return; 1257c914f7d1SChris Leech } 1258c914f7d1SChris Leech 1259c914f7d1SChris Leech fp = fc_frame_alloc(lport, size); 12605baa17c3SChris Leech if (!fp) { 12615baa17c3SChris Leech fc_lport_error(lport, fp); 12625baa17c3SChris Leech return; 12635baa17c3SChris Leech } 12645baa17c3SChris Leech 1265c914f7d1SChris Leech if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, 12667cccc157SChris Leech fc_lport_ns_resp, 1267b94f8951SJoe Eykholt lport, 3 * lport->r_a_tov)) 1268c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1269c9c7bd7aSChris Leech } 1270c9c7bd7aSChris Leech 127142e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 127242e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 127342e9a92fSRobert Love }; 127442e9a92fSRobert Love 127542e9a92fSRobert Love /** 12763a3b42bfSRobert Love * fc_rport_enter_dns() - Create a fc_rport for the name server 12773a3b42bfSRobert Love * @lport: The local port requesting a remote port for the name server 127842e9a92fSRobert Love * 127942e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 128042e9a92fSRobert Love * this routine. 128142e9a92fSRobert Love */ 128242e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 128342e9a92fSRobert Love { 1284ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 128542e9a92fSRobert Love 12867414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 12877414705eSRobert Love fc_lport_state(lport)); 128842e9a92fSRobert Love 128942e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 129042e9a92fSRobert Love 129148f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 12929737e6a7SRobert Love rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); 129348f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 12949fb9d328SJoe Eykholt if (!rdata) 129542e9a92fSRobert Love goto err; 129642e9a92fSRobert Love 129742e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 12989fb9d328SJoe Eykholt lport->tt.rport_login(rdata); 129942e9a92fSRobert Love return; 130042e9a92fSRobert Love 130142e9a92fSRobert Love err: 130242e9a92fSRobert Love fc_lport_error(lport, NULL); 130342e9a92fSRobert Love } 130442e9a92fSRobert Love 130542e9a92fSRobert Love /** 13063a3b42bfSRobert Love * fc_lport_timeout() - Handler for the retry_work timer 13073a3b42bfSRobert Love * @work: The work struct of the local port 130842e9a92fSRobert Love */ 130942e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 131042e9a92fSRobert Love { 131142e9a92fSRobert Love struct fc_lport *lport = 131242e9a92fSRobert Love container_of(work, struct fc_lport, 131342e9a92fSRobert Love retry_work.work); 131442e9a92fSRobert Love 131542e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 131642e9a92fSRobert Love 131742e9a92fSRobert Love switch (lport->state) { 1318b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 131942e9a92fSRobert Love WARN_ON(1); 132042e9a92fSRobert Love break; 132122655ac2SJoe Eykholt case LPORT_ST_READY: 132222655ac2SJoe Eykholt WARN_ON(1); 132322655ac2SJoe Eykholt break; 132422655ac2SJoe Eykholt case LPORT_ST_RESET: 132522655ac2SJoe Eykholt break; 132642e9a92fSRobert Love case LPORT_ST_FLOGI: 132742e9a92fSRobert Love fc_lport_enter_flogi(lport); 132842e9a92fSRobert Love break; 132942e9a92fSRobert Love case LPORT_ST_DNS: 133042e9a92fSRobert Love fc_lport_enter_dns(lport); 133142e9a92fSRobert Love break; 1332c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 13335baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1334c9866a54SChris Leech case LPORT_ST_RSPN_ID: 133542e9a92fSRobert Love case LPORT_ST_RFT_ID: 1336ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1337c914f7d1SChris Leech fc_lport_enter_ns(lport, lport->state); 133842e9a92fSRobert Love break; 133942e9a92fSRobert Love case LPORT_ST_SCR: 134042e9a92fSRobert Love fc_lport_enter_scr(lport); 134142e9a92fSRobert Love break; 134242e9a92fSRobert Love case LPORT_ST_LOGO: 134342e9a92fSRobert Love fc_lport_enter_logo(lport); 134442e9a92fSRobert Love break; 134542e9a92fSRobert Love } 134642e9a92fSRobert Love 134742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 134842e9a92fSRobert Love } 134942e9a92fSRobert Love 135042e9a92fSRobert Love /** 135134f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 13523a3b42bfSRobert Love * @sp: The sequence that the LOGO was on 13533a3b42bfSRobert Love * @fp: The LOGO frame 13543a3b42bfSRobert Love * @lp_arg: The lport port that received the LOGO request 135542e9a92fSRobert Love * 135642e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 13573a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 135842e9a92fSRobert Love * and then unlock the lport. 135942e9a92fSRobert Love */ 136011b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 136142e9a92fSRobert Love void *lp_arg) 136242e9a92fSRobert Love { 136342e9a92fSRobert Love struct fc_lport *lport = lp_arg; 136442e9a92fSRobert Love u8 op; 136542e9a92fSRobert Love 1366f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1367f657d299SJoe Eykholt 136842e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 136942e9a92fSRobert Love return; 137042e9a92fSRobert Love 137142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 137242e9a92fSRobert Love 137342e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 13747414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 13757414705eSRobert Love "%s\n", fc_lport_state(lport)); 137676f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 137776f6804eSAbhijeet Joglekar goto err; 137842e9a92fSRobert Love goto out; 137942e9a92fSRobert Love } 138042e9a92fSRobert Love 138176f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 138276f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 138376f6804eSAbhijeet Joglekar goto err; 138476f6804eSAbhijeet Joglekar } 138576f6804eSAbhijeet Joglekar 138642e9a92fSRobert Love op = fc_frame_payload_op(fp); 138742e9a92fSRobert Love if (op == ELS_LS_ACC) 13881190d925SJoe Eykholt fc_lport_enter_disabled(lport); 138942e9a92fSRobert Love else 139042e9a92fSRobert Love fc_lport_error(lport, fp); 139142e9a92fSRobert Love 139242e9a92fSRobert Love out: 139342e9a92fSRobert Love fc_frame_free(fp); 139442e9a92fSRobert Love err: 139542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 139642e9a92fSRobert Love } 139711b56188SChris Leech EXPORT_SYMBOL(fc_lport_logo_resp); 139842e9a92fSRobert Love 139942e9a92fSRobert Love /** 140034f42a07SRobert Love * fc_rport_enter_logo() - Logout of the fabric 14013a3b42bfSRobert Love * @lport: The local port to be logged out 140242e9a92fSRobert Love * 140342e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 140442e9a92fSRobert Love * this routine. 140542e9a92fSRobert Love */ 140642e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 140742e9a92fSRobert Love { 140842e9a92fSRobert Love struct fc_frame *fp; 140942e9a92fSRobert Love struct fc_els_logo *logo; 141042e9a92fSRobert Love 14117414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 14127414705eSRobert Love fc_lport_state(lport)); 141342e9a92fSRobert Love 141442e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 14158faecddbSChris Leech fc_vports_linkchange(lport); 141642e9a92fSRobert Love 141742e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 141842e9a92fSRobert Love if (!fp) { 141942e9a92fSRobert Love fc_lport_error(lport, fp); 142042e9a92fSRobert Love return; 142142e9a92fSRobert Love } 142242e9a92fSRobert Love 1423a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1424b94f8951SJoe Eykholt fc_lport_logo_resp, lport, 1425b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 14268f550f93SChris Leech fc_lport_error(lport, NULL); 142742e9a92fSRobert Love } 142842e9a92fSRobert Love 142942e9a92fSRobert Love /** 143034f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 14313a3b42bfSRobert Love * @sp: The sequence that the FLOGI was on 14323a3b42bfSRobert Love * @fp: The FLOGI response frame 14333a3b42bfSRobert Love * @lp_arg: The lport port that received the FLOGI response 143442e9a92fSRobert Love * 143542e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 14363a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 143742e9a92fSRobert Love * and then unlock the lport. 143842e9a92fSRobert Love */ 143911b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 144042e9a92fSRobert Love void *lp_arg) 144142e9a92fSRobert Love { 144242e9a92fSRobert Love struct fc_lport *lport = lp_arg; 144342e9a92fSRobert Love struct fc_frame_header *fh; 144442e9a92fSRobert Love struct fc_els_flogi *flp; 144542e9a92fSRobert Love u32 did; 144642e9a92fSRobert Love u16 csp_flags; 144742e9a92fSRobert Love unsigned int r_a_tov; 144842e9a92fSRobert Love unsigned int e_d_tov; 144942e9a92fSRobert Love u16 mfs; 145042e9a92fSRobert Love 1451f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1452f657d299SJoe Eykholt 145342e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 145442e9a92fSRobert Love return; 145542e9a92fSRobert Love 145642e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 145742e9a92fSRobert Love 145842e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 14597414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 14607414705eSRobert Love "%s\n", fc_lport_state(lport)); 146176f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 146276f6804eSAbhijeet Joglekar goto err; 146342e9a92fSRobert Love goto out; 146442e9a92fSRobert Love } 146542e9a92fSRobert Love 146676f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 146776f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 146876f6804eSAbhijeet Joglekar goto err; 146976f6804eSAbhijeet Joglekar } 147076f6804eSAbhijeet Joglekar 147142e9a92fSRobert Love fh = fc_frame_header_get(fp); 147242e9a92fSRobert Love did = ntoh24(fh->fh_d_id); 147342e9a92fSRobert Love if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { 147442e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 147542e9a92fSRobert Love if (flp) { 147642e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 147742e9a92fSRobert Love FC_SP_BB_DATA_MASK; 147842e9a92fSRobert Love if (mfs >= FC_SP_MIN_MAX_PAYLOAD && 147942e9a92fSRobert Love mfs < lport->mfs) 148042e9a92fSRobert Love lport->mfs = mfs; 148142e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 148242e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 148342e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 148442e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 148542e9a92fSRobert Love e_d_tov /= 1000000; 1486db36c06cSChris Leech 1487db36c06cSChris Leech lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); 1488db36c06cSChris Leech 148942e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 149042e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 149142e9a92fSRobert Love lport->e_d_tov = e_d_tov; 149242e9a92fSRobert Love lport->r_a_tov = 2 * e_d_tov; 1493093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 1494e6d8a1b0SJoe Eykholt printk(KERN_INFO "host%d: libfc: " 1495ce8b5df0SChris Leech "Port (%6.6x) entered " 1496e6d8a1b0SJoe Eykholt "point-to-point mode\n", 1497e6d8a1b0SJoe Eykholt lport->host->host_no, did); 149842e9a92fSRobert Love fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), 149942e9a92fSRobert Love get_unaligned_be64( 150042e9a92fSRobert Love &flp->fl_wwpn), 150142e9a92fSRobert Love get_unaligned_be64( 150242e9a92fSRobert Love &flp->fl_wwnn)); 150342e9a92fSRobert Love } else { 150442e9a92fSRobert Love lport->e_d_tov = e_d_tov; 150542e9a92fSRobert Love lport->r_a_tov = r_a_tov; 150642e9a92fSRobert Love fc_host_fabric_name(lport->host) = 150742e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 1508093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 150942e9a92fSRobert Love fc_lport_enter_dns(lport); 151042e9a92fSRobert Love } 151142e9a92fSRobert Love } 151242e9a92fSRobert Love } else { 15137414705eSRobert Love FC_LPORT_DBG(lport, "Bad FLOGI response\n"); 151442e9a92fSRobert Love } 151542e9a92fSRobert Love 151642e9a92fSRobert Love out: 151742e9a92fSRobert Love fc_frame_free(fp); 151842e9a92fSRobert Love err: 151942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 152042e9a92fSRobert Love } 152111b56188SChris Leech EXPORT_SYMBOL(fc_lport_flogi_resp); 152242e9a92fSRobert Love 152342e9a92fSRobert Love /** 152434f42a07SRobert Love * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager 152542e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 152642e9a92fSRobert Love * 152742e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 152842e9a92fSRobert Love * this routine. 152942e9a92fSRobert Love */ 153042e9a92fSRobert Love void fc_lport_enter_flogi(struct fc_lport *lport) 153142e9a92fSRobert Love { 153242e9a92fSRobert Love struct fc_frame *fp; 153342e9a92fSRobert Love 15347414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 15357414705eSRobert Love fc_lport_state(lport)); 153642e9a92fSRobert Love 153742e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 153842e9a92fSRobert Love 153942e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 154042e9a92fSRobert Love if (!fp) 154142e9a92fSRobert Love return fc_lport_error(lport, fp); 154242e9a92fSRobert Love 1543db36c06cSChris Leech if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, 1544db36c06cSChris Leech lport->vport ? ELS_FDISC : ELS_FLOGI, 1545b94f8951SJoe Eykholt fc_lport_flogi_resp, lport, 1546b94f8951SJoe Eykholt lport->vport ? 2 * lport->r_a_tov : 1547b94f8951SJoe Eykholt lport->e_d_tov)) 15488f550f93SChris Leech fc_lport_error(lport, NULL); 154942e9a92fSRobert Love } 155042e9a92fSRobert Love 15513a3b42bfSRobert Love /** 15523a3b42bfSRobert Love * fc_lport_config() - Configure a fc_lport 15533a3b42bfSRobert Love * @lport: The local port to be configured 15543a3b42bfSRobert Love */ 155542e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 155642e9a92fSRobert Love { 155742e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 155842e9a92fSRobert Love mutex_init(&lport->lp_mutex); 155942e9a92fSRobert Love 1560b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 156142e9a92fSRobert Love 156242e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 156342e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 156442e9a92fSRobert Love 156542e9a92fSRobert Love return 0; 156642e9a92fSRobert Love } 156742e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 156842e9a92fSRobert Love 15693a3b42bfSRobert Love /** 15703a3b42bfSRobert Love * fc_lport_init() - Initialize the lport layer for a local port 15713a3b42bfSRobert Love * @lport: The local port to initialize the exchange layer for 15723a3b42bfSRobert Love */ 157342e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 157442e9a92fSRobert Love { 157542e9a92fSRobert Love if (!lport->tt.lport_recv) 157642e9a92fSRobert Love lport->tt.lport_recv = fc_lport_recv_req; 157742e9a92fSRobert Love 157842e9a92fSRobert Love if (!lport->tt.lport_reset) 157942e9a92fSRobert Love lport->tt.lport_reset = fc_lport_reset; 158042e9a92fSRobert Love 158142e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 158242e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 158342e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 158442e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 158542e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 158642e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 158742e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 158842e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 158942e9a92fSRobert Love 159042e9a92fSRobert Love /* This value is also unchanging */ 159142e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 159242e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 159342e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 159442e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 159542e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 159642e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 159742e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 159842e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 159942e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 160042e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 160142e9a92fSRobert Love 160242e9a92fSRobert Love return 0; 160342e9a92fSRobert Love } 160442e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1605a51ab396SSteve Ma 1606a51ab396SSteve Ma /** 16073a3b42bfSRobert Love * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests 16083a3b42bfSRobert Love * @sp: The sequence for the FC Passthrough response 16093a3b42bfSRobert Love * @fp: The response frame 16103a3b42bfSRobert Love * @info_arg: The BSG info that the response is for 1611a51ab396SSteve Ma */ 1612a51ab396SSteve Ma static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, 1613a51ab396SSteve Ma void *info_arg) 1614a51ab396SSteve Ma { 1615a51ab396SSteve Ma struct fc_bsg_info *info = info_arg; 1616a51ab396SSteve Ma struct fc_bsg_job *job = info->job; 1617a51ab396SSteve Ma struct fc_lport *lport = info->lport; 1618a51ab396SSteve Ma struct fc_frame_header *fh; 1619a51ab396SSteve Ma size_t len; 1620a51ab396SSteve Ma void *buf; 1621a51ab396SSteve Ma 1622a51ab396SSteve Ma if (IS_ERR(fp)) { 1623a51ab396SSteve Ma job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? 1624a51ab396SSteve Ma -ECONNABORTED : -ETIMEDOUT; 1625a51ab396SSteve Ma job->reply_len = sizeof(uint32_t); 1626a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1627a51ab396SSteve Ma job->job_done(job); 1628a51ab396SSteve Ma kfree(info); 1629a51ab396SSteve Ma return; 1630a51ab396SSteve Ma } 1631a51ab396SSteve Ma 1632a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1633a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1634a51ab396SSteve Ma len = fr_len(fp) - sizeof(*fh); 1635a51ab396SSteve Ma buf = fc_frame_payload_get(fp, 0); 1636a51ab396SSteve Ma 1637a51ab396SSteve Ma if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { 1638a51ab396SSteve Ma /* Get the response code from the first frame payload */ 1639a51ab396SSteve Ma unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? 1640a51ab396SSteve Ma ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : 1641a51ab396SSteve Ma (unsigned short)fc_frame_payload_op(fp); 1642a51ab396SSteve Ma 1643a51ab396SSteve Ma /* Save the reply status of the job */ 1644a51ab396SSteve Ma job->reply->reply_data.ctels_reply.status = 1645a51ab396SSteve Ma (cmd == info->rsp_code) ? 1646a51ab396SSteve Ma FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; 1647a51ab396SSteve Ma } 1648a51ab396SSteve Ma 1649a51ab396SSteve Ma job->reply->reply_payload_rcv_len += 1650a51ab396SSteve Ma fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, 1651a51ab396SSteve Ma &info->offset, KM_BIO_SRC_IRQ, NULL); 1652a51ab396SSteve Ma 1653a51ab396SSteve Ma if (fr_eof(fp) == FC_EOF_T && 1654a51ab396SSteve Ma (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == 1655a51ab396SSteve Ma (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { 1656a51ab396SSteve Ma if (job->reply->reply_payload_rcv_len > 1657a51ab396SSteve Ma job->reply_payload.payload_len) 1658a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 1659a51ab396SSteve Ma job->reply_payload.payload_len; 1660a51ab396SSteve Ma job->reply->result = 0; 1661a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1662a51ab396SSteve Ma job->job_done(job); 1663a51ab396SSteve Ma kfree(info); 1664a51ab396SSteve Ma } 1665a51ab396SSteve Ma fc_frame_free(fp); 1666a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1667a51ab396SSteve Ma } 1668a51ab396SSteve Ma 1669a51ab396SSteve Ma /** 16703a3b42bfSRobert Love * fc_lport_els_request() - Send ELS passthrough request 16713a3b42bfSRobert Love * @job: The BSG Passthrough job 1672a51ab396SSteve Ma * @lport: The local port sending the request 16733a3b42bfSRobert Love * @did: The destination port id 1674a51ab396SSteve Ma * 1675a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1676a51ab396SSteve Ma * this routine. 1677a51ab396SSteve Ma */ 1678a51ab396SSteve Ma static int fc_lport_els_request(struct fc_bsg_job *job, 1679a51ab396SSteve Ma struct fc_lport *lport, 1680a51ab396SSteve Ma u32 did, u32 tov) 1681a51ab396SSteve Ma { 1682a51ab396SSteve Ma struct fc_bsg_info *info; 1683a51ab396SSteve Ma struct fc_frame *fp; 1684a51ab396SSteve Ma struct fc_frame_header *fh; 1685a51ab396SSteve Ma char *pp; 1686a51ab396SSteve Ma int len; 1687a51ab396SSteve Ma 168870d919fbSYi Zou fp = fc_frame_alloc(lport, job->request_payload.payload_len); 1689a51ab396SSteve Ma if (!fp) 1690a51ab396SSteve Ma return -ENOMEM; 1691a51ab396SSteve Ma 1692a51ab396SSteve Ma len = job->request_payload.payload_len; 1693a51ab396SSteve Ma pp = fc_frame_payload_get(fp, len); 1694a51ab396SSteve Ma 1695a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1696a51ab396SSteve Ma job->request_payload.sg_cnt, 1697a51ab396SSteve Ma pp, len); 1698a51ab396SSteve Ma 1699a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1700a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_ELS_REQ; 1701a51ab396SSteve Ma hton24(fh->fh_d_id, did); 17027b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1703a51ab396SSteve Ma fh->fh_type = FC_TYPE_ELS; 1704a51ab396SSteve Ma hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | 1705a51ab396SSteve Ma FC_FC_END_SEQ | FC_FC_SEQ_INIT); 1706a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1707a51ab396SSteve Ma fh->fh_df_ctl = 0; 1708a51ab396SSteve Ma fh->fh_parm_offset = 0; 1709a51ab396SSteve Ma 1710a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1711a51ab396SSteve Ma if (!info) { 1712a51ab396SSteve Ma fc_frame_free(fp); 1713a51ab396SSteve Ma return -ENOMEM; 1714a51ab396SSteve Ma } 1715a51ab396SSteve Ma 1716a51ab396SSteve Ma info->job = job; 1717a51ab396SSteve Ma info->lport = lport; 1718a51ab396SSteve Ma info->rsp_code = ELS_LS_ACC; 1719a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1720a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1721a51ab396SSteve Ma 1722a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1723a51ab396SSteve Ma NULL, info, tov)) 1724a51ab396SSteve Ma return -ECOMM; 1725a51ab396SSteve Ma return 0; 1726a51ab396SSteve Ma } 1727a51ab396SSteve Ma 1728a51ab396SSteve Ma /** 17293a3b42bfSRobert Love * fc_lport_ct_request() - Send CT Passthrough request 17303a3b42bfSRobert Love * @job: The BSG Passthrough job 1731a51ab396SSteve Ma * @lport: The local port sending the request 1732a51ab396SSteve Ma * @did: The destination FC-ID 17333a3b42bfSRobert Love * @tov: The timeout period to wait for the response 1734a51ab396SSteve Ma * 1735a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1736a51ab396SSteve Ma * this routine. 1737a51ab396SSteve Ma */ 1738a51ab396SSteve Ma static int fc_lport_ct_request(struct fc_bsg_job *job, 1739a51ab396SSteve Ma struct fc_lport *lport, u32 did, u32 tov) 1740a51ab396SSteve Ma { 1741a51ab396SSteve Ma struct fc_bsg_info *info; 1742a51ab396SSteve Ma struct fc_frame *fp; 1743a51ab396SSteve Ma struct fc_frame_header *fh; 1744a51ab396SSteve Ma struct fc_ct_req *ct; 1745a51ab396SSteve Ma size_t len; 1746a51ab396SSteve Ma 1747a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 1748a51ab396SSteve Ma job->request_payload.payload_len); 1749a51ab396SSteve Ma if (!fp) 1750a51ab396SSteve Ma return -ENOMEM; 1751a51ab396SSteve Ma 1752a51ab396SSteve Ma len = job->request_payload.payload_len; 1753a51ab396SSteve Ma ct = fc_frame_payload_get(fp, len); 1754a51ab396SSteve Ma 1755a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1756a51ab396SSteve Ma job->request_payload.sg_cnt, 1757a51ab396SSteve Ma ct, len); 1758a51ab396SSteve Ma 1759a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1760a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; 1761a51ab396SSteve Ma hton24(fh->fh_d_id, did); 17627b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1763a51ab396SSteve Ma fh->fh_type = FC_TYPE_CT; 1764a51ab396SSteve Ma hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | 1765a51ab396SSteve Ma FC_FC_END_SEQ | FC_FC_SEQ_INIT); 1766a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1767a51ab396SSteve Ma fh->fh_df_ctl = 0; 1768a51ab396SSteve Ma fh->fh_parm_offset = 0; 1769a51ab396SSteve Ma 1770a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1771a51ab396SSteve Ma if (!info) { 1772a51ab396SSteve Ma fc_frame_free(fp); 1773a51ab396SSteve Ma return -ENOMEM; 1774a51ab396SSteve Ma } 1775a51ab396SSteve Ma 1776a51ab396SSteve Ma info->job = job; 1777a51ab396SSteve Ma info->lport = lport; 1778a51ab396SSteve Ma info->rsp_code = FC_FS_ACC; 1779a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1780a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1781a51ab396SSteve Ma 1782a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1783a51ab396SSteve Ma NULL, info, tov)) 1784a51ab396SSteve Ma return -ECOMM; 1785a51ab396SSteve Ma return 0; 1786a51ab396SSteve Ma } 1787a51ab396SSteve Ma 1788a51ab396SSteve Ma /** 1789a51ab396SSteve Ma * fc_lport_bsg_request() - The common entry point for sending 17903a3b42bfSRobert Love * FC Passthrough requests 17913a3b42bfSRobert Love * @job: The BSG passthrough job 1792a51ab396SSteve Ma */ 1793a51ab396SSteve Ma int fc_lport_bsg_request(struct fc_bsg_job *job) 1794a51ab396SSteve Ma { 1795a51ab396SSteve Ma struct request *rsp = job->req->next_rq; 1796a51ab396SSteve Ma struct Scsi_Host *shost = job->shost; 1797a51ab396SSteve Ma struct fc_lport *lport = shost_priv(shost); 1798a51ab396SSteve Ma struct fc_rport *rport; 1799a51ab396SSteve Ma struct fc_rport_priv *rdata; 1800a51ab396SSteve Ma int rc = -EINVAL; 1801a51ab396SSteve Ma u32 did; 1802a51ab396SSteve Ma 1803a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 0; 1804b248df30SHugh Daschbach if (rsp) 1805a51ab396SSteve Ma rsp->resid_len = job->reply_payload.payload_len; 1806a51ab396SSteve Ma 1807a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1808a51ab396SSteve Ma 1809a51ab396SSteve Ma switch (job->request->msgcode) { 1810a51ab396SSteve Ma case FC_BSG_RPT_ELS: 1811a51ab396SSteve Ma rport = job->rport; 1812a51ab396SSteve Ma if (!rport) 1813a51ab396SSteve Ma break; 1814a51ab396SSteve Ma 1815a51ab396SSteve Ma rdata = rport->dd_data; 1816a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, rport->port_id, 1817a51ab396SSteve Ma rdata->e_d_tov); 1818a51ab396SSteve Ma break; 1819a51ab396SSteve Ma 1820a51ab396SSteve Ma case FC_BSG_RPT_CT: 1821a51ab396SSteve Ma rport = job->rport; 1822a51ab396SSteve Ma if (!rport) 1823a51ab396SSteve Ma break; 1824a51ab396SSteve Ma 1825a51ab396SSteve Ma rdata = rport->dd_data; 1826a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, rport->port_id, 1827a51ab396SSteve Ma rdata->e_d_tov); 1828a51ab396SSteve Ma break; 1829a51ab396SSteve Ma 1830a51ab396SSteve Ma case FC_BSG_HST_CT: 1831a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_ct.port_id); 1832a51ab396SSteve Ma if (did == FC_FID_DIR_SERV) 18333a3b42bfSRobert Love rdata = lport->dns_rdata; 1834a51ab396SSteve Ma else 1835a51ab396SSteve Ma rdata = lport->tt.rport_lookup(lport, did); 1836a51ab396SSteve Ma 1837a51ab396SSteve Ma if (!rdata) 1838a51ab396SSteve Ma break; 1839a51ab396SSteve Ma 1840a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); 1841a51ab396SSteve Ma break; 1842a51ab396SSteve Ma 1843a51ab396SSteve Ma case FC_BSG_HST_ELS_NOLOGIN: 1844a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_els.port_id); 1845a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); 1846a51ab396SSteve Ma break; 1847a51ab396SSteve Ma } 1848a51ab396SSteve Ma 1849a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1850a51ab396SSteve Ma return rc; 1851a51ab396SSteve Ma } 1852a51ab396SSteve Ma EXPORT_SYMBOL(fc_lport_bsg_request); 1853