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 5525985edcSLucas De Marchi * callback handler because 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> 9177a2b73aSVasu Dev #include <linux/delay.h> 925a0e3ad6STejun Heo #include <linux/slab.h> 9342e9a92fSRobert Love #include <asm/unaligned.h> 9442e9a92fSRobert Love 9542e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 9642e9a92fSRobert Love 9742e9a92fSRobert Love #include <scsi/libfc.h> 9842e9a92fSRobert Love #include <scsi/fc_encode.h> 99a51ab396SSteve Ma #include <linux/scatterlist.h> 10042e9a92fSRobert Love 1018866a5d9SRobert Love #include "fc_libfc.h" 1028866a5d9SRobert Love 10342e9a92fSRobert Love /* Fabric IDs to use for point-to-point mode, chosen on whims. */ 10442e9a92fSRobert Love #define FC_LOCAL_PTP_FID_LO 0x010101 10542e9a92fSRobert Love #define FC_LOCAL_PTP_FID_HI 0x010102 10642e9a92fSRobert Love 10742e9a92fSRobert Love #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ 10842e9a92fSRobert Love 10942e9a92fSRobert Love static void fc_lport_error(struct fc_lport *, struct fc_frame *); 11042e9a92fSRobert Love 11142e9a92fSRobert Love static void fc_lport_enter_reset(struct fc_lport *); 11242e9a92fSRobert Love static void fc_lport_enter_flogi(struct fc_lport *); 11342e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *); 114c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); 11542e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *); 11642e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *); 11742e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *); 11842e9a92fSRobert Love 11942e9a92fSRobert Love static const char *fc_lport_state_names[] = { 120b1d9fd55SJoe Eykholt [LPORT_ST_DISABLED] = "disabled", 12142e9a92fSRobert Love [LPORT_ST_FLOGI] = "FLOGI", 12242e9a92fSRobert Love [LPORT_ST_DNS] = "dNS", 123c9c7bd7aSChris Leech [LPORT_ST_RNN_ID] = "RNN_ID", 1245baa17c3SChris Leech [LPORT_ST_RSNN_NN] = "RSNN_NN", 125c9866a54SChris Leech [LPORT_ST_RSPN_ID] = "RSPN_ID", 12642e9a92fSRobert Love [LPORT_ST_RFT_ID] = "RFT_ID", 127ab593b18SJoe Eykholt [LPORT_ST_RFF_ID] = "RFF_ID", 12842e9a92fSRobert Love [LPORT_ST_SCR] = "SCR", 12942e9a92fSRobert Love [LPORT_ST_READY] = "Ready", 13042e9a92fSRobert Love [LPORT_ST_LOGO] = "LOGO", 13142e9a92fSRobert Love [LPORT_ST_RESET] = "reset", 13242e9a92fSRobert Love }; 13342e9a92fSRobert Love 134a51ab396SSteve Ma /** 135a51ab396SSteve Ma * struct fc_bsg_info - FC Passthrough managemet structure 136a51ab396SSteve Ma * @job: The passthrough job 137a51ab396SSteve Ma * @lport: The local port to pass through a command 138a51ab396SSteve Ma * @rsp_code: The expected response code 139a51ab396SSteve Ma * @sg: job->reply_payload.sg_list 140a51ab396SSteve Ma * @nents: job->reply_payload.sg_cnt 141a51ab396SSteve Ma * @offset: The offset into the response data 142a51ab396SSteve Ma */ 143a51ab396SSteve Ma struct fc_bsg_info { 144a51ab396SSteve Ma struct fc_bsg_job *job; 145a51ab396SSteve Ma struct fc_lport *lport; 146a51ab396SSteve Ma u16 rsp_code; 147a51ab396SSteve Ma struct scatterlist *sg; 148a51ab396SSteve Ma u32 nents; 149a51ab396SSteve Ma size_t offset; 150a51ab396SSteve Ma }; 151a51ab396SSteve Ma 1523a3b42bfSRobert Love /** 1533a3b42bfSRobert Love * fc_frame_drop() - Dummy frame handler 1543a3b42bfSRobert Love * @lport: The local port the frame was received on 1553a3b42bfSRobert Love * @fp: The received frame 1563a3b42bfSRobert Love */ 15742e9a92fSRobert Love static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) 15842e9a92fSRobert Love { 15942e9a92fSRobert Love fc_frame_free(fp); 16042e9a92fSRobert Love return 0; 16142e9a92fSRobert Love } 16242e9a92fSRobert Love 16342e9a92fSRobert Love /** 16434f42a07SRobert Love * fc_lport_rport_callback() - Event handler for rport events 16542e9a92fSRobert Love * @lport: The lport which is receiving the event 1669fb9d328SJoe Eykholt * @rdata: private remote port data 16725985edcSLucas De Marchi * @event: The event that occurred 16842e9a92fSRobert Love * 16942e9a92fSRobert Love * Locking Note: The rport lock should not be held when calling 17042e9a92fSRobert Love * this function. 17142e9a92fSRobert Love */ 17242e9a92fSRobert Love static void fc_lport_rport_callback(struct fc_lport *lport, 1739fb9d328SJoe Eykholt struct fc_rport_priv *rdata, 17442e9a92fSRobert Love enum fc_rport_event event) 17542e9a92fSRobert Love { 176ce8b5df0SChris Leech FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event, 177f211fa51SJoe Eykholt rdata->ids.port_id); 17842e9a92fSRobert Love 179b5cbf083SJoe Eykholt mutex_lock(&lport->lp_mutex); 18042e9a92fSRobert Love switch (event) { 1814c0f62b5SJoe Eykholt case RPORT_EV_READY: 18242e9a92fSRobert Love if (lport->state == LPORT_ST_DNS) { 1833a3b42bfSRobert Love lport->dns_rdata = rdata; 184c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); 18542e9a92fSRobert Love } else { 1864c0f62b5SJoe Eykholt FC_LPORT_DBG(lport, "Received an READY event " 187ce8b5df0SChris Leech "on port (%6.6x) for the directory " 18842e9a92fSRobert Love "server, but the lport is not " 18942e9a92fSRobert Love "in the DNS state, it's in the " 190f211fa51SJoe Eykholt "%d state", rdata->ids.port_id, 19142e9a92fSRobert Love lport->state); 1929fb9d328SJoe Eykholt lport->tt.rport_logoff(rdata); 19342e9a92fSRobert Love } 19442e9a92fSRobert Love break; 19542e9a92fSRobert Love case RPORT_EV_LOGO: 19642e9a92fSRobert Love case RPORT_EV_FAILED: 19742e9a92fSRobert Love case RPORT_EV_STOP: 1983a3b42bfSRobert Love lport->dns_rdata = NULL; 19942e9a92fSRobert Love break; 20042e9a92fSRobert Love case RPORT_EV_NONE: 20142e9a92fSRobert Love break; 20242e9a92fSRobert Love } 203b5cbf083SJoe Eykholt mutex_unlock(&lport->lp_mutex); 20442e9a92fSRobert Love } 20542e9a92fSRobert Love 20642e9a92fSRobert Love /** 20734f42a07SRobert Love * fc_lport_state() - Return a string which represents the lport's state 20842e9a92fSRobert Love * @lport: The lport whose state is to converted to a string 20942e9a92fSRobert Love */ 21042e9a92fSRobert Love static const char *fc_lport_state(struct fc_lport *lport) 21142e9a92fSRobert Love { 21242e9a92fSRobert Love const char *cp; 21342e9a92fSRobert Love 21442e9a92fSRobert Love cp = fc_lport_state_names[lport->state]; 21542e9a92fSRobert Love if (!cp) 21642e9a92fSRobert Love cp = "unknown"; 21742e9a92fSRobert Love return cp; 21842e9a92fSRobert Love } 21942e9a92fSRobert Love 22042e9a92fSRobert Love /** 22134f42a07SRobert Love * fc_lport_ptp_setup() - Create an rport for point-to-point mode 22242e9a92fSRobert Love * @lport: The lport to attach the ptp rport to 2233a3b42bfSRobert Love * @remote_fid: The FID of the ptp rport 22442e9a92fSRobert Love * @remote_wwpn: The WWPN of the ptp rport 22542e9a92fSRobert Love * @remote_wwnn: The WWNN of the ptp rport 22642e9a92fSRobert Love */ 22742e9a92fSRobert Love static void fc_lport_ptp_setup(struct fc_lport *lport, 22842e9a92fSRobert Love u32 remote_fid, u64 remote_wwpn, 22942e9a92fSRobert Love u64 remote_wwnn) 23042e9a92fSRobert Love { 23148f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 2322f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 2333a3b42bfSRobert Love lport->tt.rport_logoff(lport->ptp_rdata); 2342f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 2352f2ac4a0SJoe Eykholt } 2363a3b42bfSRobert Love lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid); 2372f2ac4a0SJoe Eykholt kref_get(&lport->ptp_rdata->kref); 2383a3b42bfSRobert Love lport->ptp_rdata->ids.port_name = remote_wwpn; 2393a3b42bfSRobert Love lport->ptp_rdata->ids.node_name = remote_wwnn; 24048f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 24142e9a92fSRobert Love 2423a3b42bfSRobert Love lport->tt.rport_login(lport->ptp_rdata); 24342e9a92fSRobert Love 24442e9a92fSRobert Love fc_lport_enter_ready(lport); 24542e9a92fSRobert Love } 24642e9a92fSRobert Love 2473a3b42bfSRobert Love /** 2483a3b42bfSRobert Love * fc_get_host_port_state() - Return the port state of the given Scsi_Host 2493a3b42bfSRobert Love * @shost: The SCSI host whose port state is to be determined 2503a3b42bfSRobert Love */ 25142e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost) 25242e9a92fSRobert Love { 2533a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 25442e9a92fSRobert Love 2553a3b42bfSRobert Love mutex_lock(&lport->lp_mutex); 2563a3b42bfSRobert Love if (!lport->link_up) 2578faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 25842e9a92fSRobert Love else 2593a3b42bfSRobert Love switch (lport->state) { 2608faecddbSChris Leech case LPORT_ST_READY: 2618faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 2628faecddbSChris Leech break; 2638faecddbSChris Leech default: 26442e9a92fSRobert Love fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 26542e9a92fSRobert Love } 2663a3b42bfSRobert Love mutex_unlock(&lport->lp_mutex); 2678faecddbSChris Leech } 26842e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_state); 26942e9a92fSRobert Love 2703a3b42bfSRobert Love /** 2713a3b42bfSRobert Love * fc_get_host_speed() - Return the speed of the given Scsi_Host 2723a3b42bfSRobert Love * @shost: The SCSI host whose port speed is to be determined 2733a3b42bfSRobert Love */ 27442e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost) 27542e9a92fSRobert Love { 27642e9a92fSRobert Love struct fc_lport *lport = shost_priv(shost); 27742e9a92fSRobert Love 27842e9a92fSRobert Love fc_host_speed(shost) = lport->link_speed; 27942e9a92fSRobert Love } 28042e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_speed); 28142e9a92fSRobert Love 2823a3b42bfSRobert Love /** 2833a3b42bfSRobert Love * fc_get_host_stats() - Return the Scsi_Host's statistics 2843a3b42bfSRobert Love * @shost: The SCSI host whose statistics are to be returned 2853a3b42bfSRobert Love */ 28642e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) 28742e9a92fSRobert Love { 28842e9a92fSRobert Love struct fc_host_statistics *fcoe_stats; 2893a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 29042e9a92fSRobert Love struct timespec v0, v1; 291582b45bcSRobert Love unsigned int cpu; 2925f0e385fSJoe Eykholt u64 fcp_in_bytes = 0; 2935f0e385fSJoe Eykholt u64 fcp_out_bytes = 0; 29442e9a92fSRobert Love 2953a3b42bfSRobert Love fcoe_stats = &lport->host_stats; 29642e9a92fSRobert Love memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); 29742e9a92fSRobert Love 29842e9a92fSRobert Love jiffies_to_timespec(jiffies, &v0); 2993a3b42bfSRobert Love jiffies_to_timespec(lport->boot_time, &v1); 30042e9a92fSRobert Love fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); 30142e9a92fSRobert Love 302582b45bcSRobert Love for_each_possible_cpu(cpu) { 303582b45bcSRobert Love struct fcoe_dev_stats *stats; 304582b45bcSRobert Love 3053a3b42bfSRobert Love stats = per_cpu_ptr(lport->dev_stats, cpu); 306582b45bcSRobert Love 30742e9a92fSRobert Love fcoe_stats->tx_frames += stats->TxFrames; 30842e9a92fSRobert Love fcoe_stats->tx_words += stats->TxWords; 30942e9a92fSRobert Love fcoe_stats->rx_frames += stats->RxFrames; 31042e9a92fSRobert Love fcoe_stats->rx_words += stats->RxWords; 31142e9a92fSRobert Love fcoe_stats->error_frames += stats->ErrorFrames; 31242e9a92fSRobert Love fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; 31342e9a92fSRobert Love fcoe_stats->fcp_input_requests += stats->InputRequests; 31442e9a92fSRobert Love fcoe_stats->fcp_output_requests += stats->OutputRequests; 31542e9a92fSRobert Love fcoe_stats->fcp_control_requests += stats->ControlRequests; 3165f0e385fSJoe Eykholt fcp_in_bytes += stats->InputBytes; 3175f0e385fSJoe Eykholt fcp_out_bytes += stats->OutputBytes; 31842e9a92fSRobert Love fcoe_stats->link_failure_count += stats->LinkFailureCount; 31942e9a92fSRobert Love } 3205f0e385fSJoe Eykholt fcoe_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000); 3215f0e385fSJoe Eykholt fcoe_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000); 32242e9a92fSRobert Love fcoe_stats->lip_count = -1; 32342e9a92fSRobert Love fcoe_stats->nos_count = -1; 32442e9a92fSRobert Love fcoe_stats->loss_of_sync_count = -1; 32542e9a92fSRobert Love fcoe_stats->loss_of_signal_count = -1; 32642e9a92fSRobert Love fcoe_stats->prim_seq_protocol_err_count = -1; 32742e9a92fSRobert Love fcoe_stats->dumped_frames = -1; 32842e9a92fSRobert Love return fcoe_stats; 32942e9a92fSRobert Love } 33042e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_stats); 33142e9a92fSRobert Love 3323a3b42bfSRobert Love /** 3333a3b42bfSRobert Love * fc_lport_flogi_fill() - Fill in FLOGI command for request 3343a3b42bfSRobert Love * @lport: The local port the FLOGI is for 3353a3b42bfSRobert Love * @flogi: The FLOGI command 3363a3b42bfSRobert Love * @op: The opcode 33742e9a92fSRobert Love */ 3383a3b42bfSRobert Love static void fc_lport_flogi_fill(struct fc_lport *lport, 3393a3b42bfSRobert Love struct fc_els_flogi *flogi, 34042e9a92fSRobert Love unsigned int op) 34142e9a92fSRobert Love { 34242e9a92fSRobert Love struct fc_els_csp *sp; 34342e9a92fSRobert Love struct fc_els_cssp *cp; 34442e9a92fSRobert Love 34542e9a92fSRobert Love memset(flogi, 0, sizeof(*flogi)); 34642e9a92fSRobert Love flogi->fl_cmd = (u8) op; 34742e9a92fSRobert Love put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); 34842e9a92fSRobert Love put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); 34942e9a92fSRobert Love sp = &flogi->fl_csp; 35042e9a92fSRobert Love sp->sp_hi_ver = 0x20; 35142e9a92fSRobert Love sp->sp_lo_ver = 0x20; 35242e9a92fSRobert Love sp->sp_bb_cred = htons(10); /* this gets set by gateway */ 35342e9a92fSRobert Love sp->sp_bb_data = htons((u16) lport->mfs); 35442e9a92fSRobert Love cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ 35542e9a92fSRobert Love cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); 35642e9a92fSRobert Love if (op != ELS_FLOGI) { 35742e9a92fSRobert Love sp->sp_features = htons(FC_SP_FT_CIRO); 35842e9a92fSRobert Love sp->sp_tot_seq = htons(255); /* seq. we accept */ 35942e9a92fSRobert Love sp->sp_rel_off = htons(0x1f); 36042e9a92fSRobert Love sp->sp_e_d_tov = htonl(lport->e_d_tov); 36142e9a92fSRobert Love 36242e9a92fSRobert Love cp->cp_rdfs = htons((u16) lport->mfs); 36342e9a92fSRobert Love cp->cp_con_seq = htons(255); 36442e9a92fSRobert Love cp->cp_open_seq = 1; 36542e9a92fSRobert Love } 36642e9a92fSRobert Love } 36742e9a92fSRobert Love 3683a3b42bfSRobert Love /** 3693a3b42bfSRobert Love * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port 3703a3b42bfSRobert Love * @lport: The local port to add a new FC-4 type to 3713a3b42bfSRobert Love * @type: The new FC-4 type 37242e9a92fSRobert Love */ 37342e9a92fSRobert Love static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) 37442e9a92fSRobert Love { 37542e9a92fSRobert Love __be32 *mp; 37642e9a92fSRobert Love 37742e9a92fSRobert Love mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; 37842e9a92fSRobert Love *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); 37942e9a92fSRobert Love } 38042e9a92fSRobert Love 38142e9a92fSRobert Love /** 38234f42a07SRobert Love * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. 38325985edcSLucas De Marchi * @lport: Fibre Channel local port receiving the RLIR 38492261156SJoe Eykholt * @fp: The RLIR request frame 38542e9a92fSRobert Love * 3861b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 38742e9a92fSRobert Love * this function. 38842e9a92fSRobert Love */ 38992261156SJoe Eykholt static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp) 39042e9a92fSRobert Love { 3917414705eSRobert Love FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", 39242e9a92fSRobert Love fc_lport_state(lport)); 39342e9a92fSRobert Love 39492261156SJoe Eykholt lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); 39542e9a92fSRobert Love fc_frame_free(fp); 39642e9a92fSRobert Love } 39742e9a92fSRobert Love 39842e9a92fSRobert Love /** 39934f42a07SRobert Love * fc_lport_recv_echo_req() - Handle received ECHO request 40025985edcSLucas De Marchi * @lport: The local port receiving the ECHO 40192261156SJoe Eykholt * @fp: ECHO request frame 40242e9a92fSRobert Love * 4031b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 40442e9a92fSRobert Love * this function. 40542e9a92fSRobert Love */ 40692261156SJoe Eykholt static void fc_lport_recv_echo_req(struct fc_lport *lport, 40792261156SJoe Eykholt struct fc_frame *in_fp) 40842e9a92fSRobert Love { 40942e9a92fSRobert Love struct fc_frame *fp; 41042e9a92fSRobert Love unsigned int len; 41142e9a92fSRobert Love void *pp; 41242e9a92fSRobert Love void *dp; 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); 42824f089e2SJoe Eykholt fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); 42924f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 43042e9a92fSRobert Love } 43142e9a92fSRobert Love fc_frame_free(in_fp); 43242e9a92fSRobert Love } 43342e9a92fSRobert Love 43442e9a92fSRobert Love /** 4351b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 43625985edcSLucas De Marchi * @lport: The local port receiving the RNID 43792261156SJoe Eykholt * @fp: The RNID request frame 43842e9a92fSRobert Love * 4391b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 44042e9a92fSRobert Love * this function. 44142e9a92fSRobert Love */ 44292261156SJoe Eykholt static void fc_lport_recv_rnid_req(struct fc_lport *lport, 44392261156SJoe Eykholt struct fc_frame *in_fp) 44442e9a92fSRobert Love { 44542e9a92fSRobert Love struct fc_frame *fp; 44642e9a92fSRobert Love struct fc_els_rnid *req; 44742e9a92fSRobert Love struct { 44842e9a92fSRobert Love struct fc_els_rnid_resp rnid; 44942e9a92fSRobert Love struct fc_els_rnid_cid cid; 45042e9a92fSRobert Love struct fc_els_rnid_gen gen; 45142e9a92fSRobert Love } *rp; 45242e9a92fSRobert Love struct fc_seq_els_data rjt_data; 45342e9a92fSRobert Love u8 fmt; 45442e9a92fSRobert Love size_t len; 45542e9a92fSRobert Love 4567414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 45742e9a92fSRobert Love fc_lport_state(lport)); 45842e9a92fSRobert Love 45942e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 46042e9a92fSRobert Love if (!req) { 46142e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 46242e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 46392261156SJoe Eykholt lport->tt.seq_els_rsp_send(in_fp, 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 49525985edcSLucas De Marchi * @lport: The local port receiving the LOGO 49692261156SJoe Eykholt * @fp: The LOGO request frame 49742e9a92fSRobert Love * 49842e9a92fSRobert Love * Locking Note: The lport lock is exected to be held before calling 49942e9a92fSRobert Love * this function. 50042e9a92fSRobert Love */ 50192261156SJoe Eykholt static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) 50242e9a92fSRobert Love { 50392261156SJoe Eykholt lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); 50442e9a92fSRobert Love fc_lport_enter_reset(lport); 50542e9a92fSRobert Love fc_frame_free(fp); 50642e9a92fSRobert Love } 50742e9a92fSRobert Love 50842e9a92fSRobert Love /** 50934f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 5103a3b42bfSRobert Love * @lport: The local port that should log into the fabric 51142e9a92fSRobert Love * 51242e9a92fSRobert Love * Locking Note: This function should not be called 51342e9a92fSRobert Love * with the lport lock held. 51442e9a92fSRobert Love */ 51542e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 51642e9a92fSRobert Love { 51742e9a92fSRobert Love int rc = -1; 51842e9a92fSRobert Love 51942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 52055a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || 52155a66d3cSVasu Dev lport->state == LPORT_ST_LOGO) { 52255a66d3cSVasu Dev fc_lport_state_enter(lport, LPORT_ST_RESET); 52342e9a92fSRobert Love fc_lport_enter_reset(lport); 52442e9a92fSRobert Love rc = 0; 52542e9a92fSRobert Love } 52642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 52742e9a92fSRobert Love 52842e9a92fSRobert Love return rc; 52942e9a92fSRobert Love } 53042e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 53142e9a92fSRobert Love 53242e9a92fSRobert Love /** 5338faecddbSChris Leech * __fc_linkup() - Handler for transport linkup events 5348faecddbSChris Leech * @lport: The lport whose link is up 5358faecddbSChris Leech * 5368faecddbSChris Leech * Locking: must be called with the lp_mutex held 5378faecddbSChris Leech */ 5388faecddbSChris Leech void __fc_linkup(struct fc_lport *lport) 5398faecddbSChris Leech { 5408faecddbSChris Leech if (!lport->link_up) { 5418faecddbSChris Leech lport->link_up = 1; 5428faecddbSChris Leech 5438faecddbSChris Leech if (lport->state == LPORT_ST_RESET) 5448faecddbSChris Leech fc_lport_enter_flogi(lport); 5458faecddbSChris Leech } 5468faecddbSChris Leech } 5478faecddbSChris Leech 5488faecddbSChris Leech /** 54934f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 5503a3b42bfSRobert Love * @lport: The local port whose link is up 55142e9a92fSRobert Love */ 55242e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 55342e9a92fSRobert Love { 554ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", 5557b2787ecSRobert Love lport->host->host_no, lport->port_id); 55642e9a92fSRobert Love 55742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5588faecddbSChris Leech __fc_linkup(lport); 55942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 56042e9a92fSRobert Love } 56142e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 56242e9a92fSRobert Love 56342e9a92fSRobert Love /** 5648faecddbSChris Leech * __fc_linkdown() - Handler for transport linkdown events 5658faecddbSChris Leech * @lport: The lport whose link is down 5668faecddbSChris Leech * 5678faecddbSChris Leech * Locking: must be called with the lp_mutex held 5688faecddbSChris Leech */ 5698faecddbSChris Leech void __fc_linkdown(struct fc_lport *lport) 5708faecddbSChris Leech { 5718faecddbSChris Leech if (lport->link_up) { 5728faecddbSChris Leech lport->link_up = 0; 5738faecddbSChris Leech fc_lport_enter_reset(lport); 5748faecddbSChris Leech lport->tt.fcp_cleanup(lport); 5758faecddbSChris Leech } 5768faecddbSChris Leech } 5778faecddbSChris Leech 5788faecddbSChris Leech /** 57934f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 5803a3b42bfSRobert Love * @lport: The local port whose link is down 58142e9a92fSRobert Love */ 58242e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 58342e9a92fSRobert Love { 584ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", 5857b2787ecSRobert Love lport->host->host_no, lport->port_id); 58642e9a92fSRobert Love 5878faecddbSChris Leech mutex_lock(&lport->lp_mutex); 5888faecddbSChris Leech __fc_linkdown(lport); 58942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 59042e9a92fSRobert Love } 59142e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 59242e9a92fSRobert Love 59342e9a92fSRobert Love /** 59434f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 5953a3b42bfSRobert Love * @lport: The local port to logoff the fabric 59642e9a92fSRobert Love * 59742e9a92fSRobert Love * Return value: 59842e9a92fSRobert Love * 0 for success, -1 for failure 59934f42a07SRobert Love */ 60042e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 60142e9a92fSRobert Love { 60242e9a92fSRobert Love lport->tt.disc_stop_final(lport); 60342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 6043a3b42bfSRobert Love if (lport->dns_rdata) 6053a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 606a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 607a0fd2e49SAbhijeet Joglekar lport->tt.rport_flush_queue(); 608a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 60942e9a92fSRobert Love fc_lport_enter_logo(lport); 61042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 611f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 61242e9a92fSRobert Love return 0; 61342e9a92fSRobert Love } 61442e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 61542e9a92fSRobert Love 61642e9a92fSRobert Love /** 6173a3b42bfSRobert Love * fc_lport_destroy() - Unregister a fc_lport 6183a3b42bfSRobert Love * @lport: The local port to unregister 61942e9a92fSRobert Love * 62042e9a92fSRobert Love * Note: 62142e9a92fSRobert Love * exit routine for fc_lport instance 62242e9a92fSRobert Love * clean-up all the allocated memory 62342e9a92fSRobert Love * and free up other system resources. 62442e9a92fSRobert Love * 62534f42a07SRobert Love */ 62642e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 62742e9a92fSRobert Love { 628bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 629b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 630bbf15669SAbhijeet Joglekar lport->link_up = 0; 63142e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 632bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 633bbf15669SAbhijeet Joglekar 63442e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 635e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 6361f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 63770d53b04SJoe Eykholt fc_fc4_del_lport(lport); 63842e9a92fSRobert Love return 0; 63942e9a92fSRobert Love } 64042e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 64142e9a92fSRobert Love 64242e9a92fSRobert Love /** 6433a3b42bfSRobert Love * fc_set_mfs() - Set the maximum frame size for a local port 6443a3b42bfSRobert Love * @lport: The local port to set the MFS for 6453a3b42bfSRobert Love * @mfs: The new MFS 64634f42a07SRobert Love */ 64742e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 64842e9a92fSRobert Love { 64942e9a92fSRobert Love unsigned int old_mfs; 65042e9a92fSRobert Love int rc = -EINVAL; 65142e9a92fSRobert Love 65242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 65342e9a92fSRobert Love 65442e9a92fSRobert Love old_mfs = lport->mfs; 65542e9a92fSRobert Love 65642e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 65742e9a92fSRobert Love mfs &= ~3; 65842e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 65942e9a92fSRobert Love mfs = FC_MAX_FRAME; 66042e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 66142e9a92fSRobert Love lport->mfs = mfs; 66242e9a92fSRobert Love rc = 0; 66342e9a92fSRobert Love } 66442e9a92fSRobert Love 66542e9a92fSRobert Love if (!rc && mfs < old_mfs) 66642e9a92fSRobert Love fc_lport_enter_reset(lport); 66742e9a92fSRobert Love 66842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 66942e9a92fSRobert Love 67042e9a92fSRobert Love return rc; 67142e9a92fSRobert Love } 67242e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 67342e9a92fSRobert Love 67442e9a92fSRobert Love /** 67534f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 6763a3b42bfSRobert Love * @lport: The local port receiving the event 67742e9a92fSRobert Love * @event: The discovery event 67842e9a92fSRobert Love */ 67942e9a92fSRobert Love void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) 68042e9a92fSRobert Love { 68142e9a92fSRobert Love switch (event) { 68242e9a92fSRobert Love case DISC_EV_SUCCESS: 6837414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 68442e9a92fSRobert Love break; 68542e9a92fSRobert Love case DISC_EV_FAILED: 686e6d8a1b0SJoe Eykholt printk(KERN_ERR "host%d: libfc: " 687ce8b5df0SChris Leech "Discovery failed for port (%6.6x)\n", 6887b2787ecSRobert Love lport->host->host_no, lport->port_id); 68942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 69042e9a92fSRobert Love fc_lport_enter_reset(lport); 69142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 69242e9a92fSRobert Love break; 69342e9a92fSRobert Love case DISC_EV_NONE: 69442e9a92fSRobert Love WARN_ON(1); 69542e9a92fSRobert Love break; 69642e9a92fSRobert Love } 69742e9a92fSRobert Love } 69842e9a92fSRobert Love 69942e9a92fSRobert Love /** 70034f42a07SRobert Love * fc_rport_enter_ready() - Enter the ready state and start discovery 7013a3b42bfSRobert Love * @lport: The local port that is ready 70242e9a92fSRobert Love * 70342e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 70442e9a92fSRobert Love * this routine. 70542e9a92fSRobert Love */ 70642e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 70742e9a92fSRobert Love { 7087414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 7097414705eSRobert Love fc_lport_state(lport)); 71042e9a92fSRobert Love 71142e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 7128faecddbSChris Leech if (lport->vport) 7138faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); 7148faecddbSChris Leech fc_vports_linkchange(lport); 71542e9a92fSRobert Love 7163a3b42bfSRobert Love if (!lport->ptp_rdata) 71742e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 71842e9a92fSRobert Love } 71942e9a92fSRobert Love 72042e9a92fSRobert Love /** 721093bb6a2SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID 722093bb6a2SJoe Eykholt * @lport: The local port which will have its Port ID set. 723093bb6a2SJoe Eykholt * @port_id: The new port ID. 724093bb6a2SJoe Eykholt * @fp: The frame containing the incoming request, or NULL. 725093bb6a2SJoe Eykholt * 726093bb6a2SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 727093bb6a2SJoe Eykholt * this function. 728093bb6a2SJoe Eykholt */ 729093bb6a2SJoe Eykholt static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, 730093bb6a2SJoe Eykholt struct fc_frame *fp) 731093bb6a2SJoe Eykholt { 732093bb6a2SJoe Eykholt if (port_id) 733ce8b5df0SChris Leech printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", 734093bb6a2SJoe Eykholt lport->host->host_no, port_id); 735093bb6a2SJoe Eykholt 7367b2787ecSRobert Love lport->port_id = port_id; 7377b2787ecSRobert Love 7387b2787ecSRobert Love /* Update the fc_host */ 739093bb6a2SJoe Eykholt fc_host_port_id(lport->host) = port_id; 7407b2787ecSRobert Love 741093bb6a2SJoe Eykholt if (lport->tt.lport_set_port_id) 742093bb6a2SJoe Eykholt lport->tt.lport_set_port_id(lport, port_id, fp); 743093bb6a2SJoe Eykholt } 744093bb6a2SJoe Eykholt 745093bb6a2SJoe Eykholt /** 7463726f358SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint 7473726f358SJoe Eykholt * @lport: The local port which will have its Port ID set. 7483726f358SJoe Eykholt * @port_id: The new port ID. 7493726f358SJoe Eykholt * 7503726f358SJoe Eykholt * Called by the lower-level driver when transport sets the local port_id. 7513726f358SJoe Eykholt * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and 7523726f358SJoe Eykholt * discovery to be skipped. 7533726f358SJoe Eykholt */ 7543726f358SJoe Eykholt void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id) 7553726f358SJoe Eykholt { 7563726f358SJoe Eykholt mutex_lock(&lport->lp_mutex); 7573726f358SJoe Eykholt 7583726f358SJoe Eykholt fc_lport_set_port_id(lport, port_id, NULL); 7593726f358SJoe Eykholt 7603726f358SJoe Eykholt switch (lport->state) { 7613726f358SJoe Eykholt case LPORT_ST_RESET: 7623726f358SJoe Eykholt case LPORT_ST_FLOGI: 7633726f358SJoe Eykholt if (port_id) 7643726f358SJoe Eykholt fc_lport_enter_ready(lport); 7653726f358SJoe Eykholt break; 7663726f358SJoe Eykholt default: 7673726f358SJoe Eykholt break; 7683726f358SJoe Eykholt } 7693726f358SJoe Eykholt mutex_unlock(&lport->lp_mutex); 7703726f358SJoe Eykholt } 7713726f358SJoe Eykholt EXPORT_SYMBOL(fc_lport_set_local_id); 7723726f358SJoe Eykholt 7733726f358SJoe Eykholt /** 77434f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 77525985edcSLucas De Marchi * @lport: The local port that received the request 77692261156SJoe Eykholt * @rx_fp: The FLOGI frame 77742e9a92fSRobert Love * 77842e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 77942e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 78042e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 78142e9a92fSRobert Love * 7821b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 78342e9a92fSRobert Love * this function. 78442e9a92fSRobert Love */ 78592261156SJoe Eykholt static void fc_lport_recv_flogi_req(struct fc_lport *lport, 78692261156SJoe Eykholt struct fc_frame *rx_fp) 78742e9a92fSRobert Love { 78842e9a92fSRobert Love struct fc_frame *fp; 78924f089e2SJoe Eykholt struct fc_frame_header *fh; 79042e9a92fSRobert Love struct fc_els_flogi *flp; 79142e9a92fSRobert Love struct fc_els_flogi *new_flp; 79242e9a92fSRobert Love u64 remote_wwpn; 79342e9a92fSRobert Love u32 remote_fid; 79442e9a92fSRobert Love u32 local_fid; 79542e9a92fSRobert Love 7967414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 79742e9a92fSRobert Love fc_lport_state(lport)); 79842e9a92fSRobert Love 799251748a9SJoe Eykholt remote_fid = fc_frame_sid(rx_fp); 80042e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 80142e9a92fSRobert Love if (!flp) 80242e9a92fSRobert Love goto out; 80342e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 80442e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 805e6d8a1b0SJoe Eykholt printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " 8069f8f3aa6SChris Leech "with same WWPN %16.16llx\n", 807e6d8a1b0SJoe Eykholt lport->host->host_no, remote_wwpn); 80842e9a92fSRobert Love goto out; 80942e9a92fSRobert Love } 8109f8f3aa6SChris Leech FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); 81142e9a92fSRobert Love 81242e9a92fSRobert Love /* 81342e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 81442e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 81542e9a92fSRobert Love * But if so, both of us could end up with the same FID. 81642e9a92fSRobert Love */ 81742e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 81842e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 81942e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 82042e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 82142e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 82242e9a92fSRobert Love } else if (!remote_fid) { 82342e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 82442e9a92fSRobert Love } 82542e9a92fSRobert Love 826093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, local_fid, rx_fp); 82742e9a92fSRobert Love 82842e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 82942e9a92fSRobert Love if (fp) { 83042e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 83142e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 83242e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 83342e9a92fSRobert Love 83442e9a92fSRobert Love /* 83542e9a92fSRobert Love * Send the response. If this fails, the originator should 83642e9a92fSRobert Love * repeat the sequence. 83742e9a92fSRobert Love */ 83824f089e2SJoe Eykholt fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); 83924f089e2SJoe Eykholt fh = fc_frame_header_get(fp); 84024f089e2SJoe Eykholt hton24(fh->fh_s_id, local_fid); 84124f089e2SJoe Eykholt hton24(fh->fh_d_id, remote_fid); 84224f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 84342e9a92fSRobert Love 84442e9a92fSRobert Love } else { 84542e9a92fSRobert Love fc_lport_error(lport, fp); 84642e9a92fSRobert Love } 84742e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 84842e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 84942e9a92fSRobert Love out: 85042e9a92fSRobert Love fc_frame_free(rx_fp); 85142e9a92fSRobert Love } 85242e9a92fSRobert Love 85342e9a92fSRobert Love /** 85496ad8464SJoe Eykholt * fc_lport_recv_els_req() - The generic lport ELS request handler 8553a3b42bfSRobert Love * @lport: The local port that received the request 8563a3b42bfSRobert Love * @fp: The request frame 85742e9a92fSRobert Love * 85842e9a92fSRobert Love * This function will see if the lport handles the request or 85942e9a92fSRobert Love * if an rport should handle the request. 86042e9a92fSRobert Love * 86142e9a92fSRobert Love * Locking Note: This function should not be called with the lport 86225985edcSLucas De Marchi * lock held because it will grab the lock. 86342e9a92fSRobert Love */ 86496ad8464SJoe Eykholt static void fc_lport_recv_els_req(struct fc_lport *lport, 86596ad8464SJoe Eykholt struct fc_frame *fp) 86642e9a92fSRobert Love { 86792261156SJoe Eykholt void (*recv)(struct fc_lport *, struct fc_frame *); 86842e9a92fSRobert Love 86942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 87042e9a92fSRobert Love 87142e9a92fSRobert Love /* 87242e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 87342e9a92fSRobert Love * RSCN here. These don't require a session. 87442e9a92fSRobert Love * Even if we had a session, it might not be ready. 87542e9a92fSRobert Love */ 876e9ba8b42SJoe Eykholt if (!lport->link_up) 877e9ba8b42SJoe Eykholt fc_frame_free(fp); 87896ad8464SJoe Eykholt else { 87942e9a92fSRobert Love /* 88042e9a92fSRobert Love * Check opcode. 88142e9a92fSRobert Love */ 882131203a1SJoe Eykholt recv = lport->tt.rport_recv_req; 88342e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 88442e9a92fSRobert Love case ELS_FLOGI: 885a7b12a27SJoe Eykholt if (!lport->point_to_multipoint) 88642e9a92fSRobert Love recv = fc_lport_recv_flogi_req; 88742e9a92fSRobert Love break; 88842e9a92fSRobert Love case ELS_LOGO: 889251748a9SJoe Eykholt if (fc_frame_sid(fp) == FC_FID_FLOGI) 89042e9a92fSRobert Love recv = fc_lport_recv_logo_req; 89142e9a92fSRobert Love break; 89242e9a92fSRobert Love case ELS_RSCN: 89342e9a92fSRobert Love recv = lport->tt.disc_recv_req; 89442e9a92fSRobert Love break; 89542e9a92fSRobert Love case ELS_ECHO: 89642e9a92fSRobert Love recv = fc_lport_recv_echo_req; 89742e9a92fSRobert Love break; 89842e9a92fSRobert Love case ELS_RLIR: 89942e9a92fSRobert Love recv = fc_lport_recv_rlir_req; 90042e9a92fSRobert Love break; 90142e9a92fSRobert Love case ELS_RNID: 90242e9a92fSRobert Love recv = fc_lport_recv_rnid_req; 90342e9a92fSRobert Love break; 90442e9a92fSRobert Love } 90542e9a92fSRobert Love 90692261156SJoe Eykholt recv(lport, fp); 90742e9a92fSRobert Love } 90842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 90942e9a92fSRobert Love } 91042e9a92fSRobert Love 91196ad8464SJoe Eykholt static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len, 91296ad8464SJoe Eykholt const struct fc_els_spp *spp_in, 91396ad8464SJoe Eykholt struct fc_els_spp *spp_out) 91496ad8464SJoe Eykholt { 91596ad8464SJoe Eykholt return FC_SPP_RESP_INVL; 91696ad8464SJoe Eykholt } 91796ad8464SJoe Eykholt 91896ad8464SJoe Eykholt struct fc4_prov fc_lport_els_prov = { 91996ad8464SJoe Eykholt .prli = fc_lport_els_prli, 92096ad8464SJoe Eykholt .recv = fc_lport_recv_els_req, 92196ad8464SJoe Eykholt }; 92296ad8464SJoe Eykholt 92396ad8464SJoe Eykholt /** 92496ad8464SJoe Eykholt * fc_lport_recv_req() - The generic lport request handler 92596ad8464SJoe Eykholt * @lport: The lport that received the request 92696ad8464SJoe Eykholt * @fp: The frame the request is in 92796ad8464SJoe Eykholt * 92896ad8464SJoe Eykholt * Locking Note: This function should not be called with the lport 92925985edcSLucas De Marchi * lock held because it may grab the lock. 93096ad8464SJoe Eykholt */ 93196ad8464SJoe Eykholt static void fc_lport_recv_req(struct fc_lport *lport, 93296ad8464SJoe Eykholt struct fc_frame *fp) 93396ad8464SJoe Eykholt { 93496ad8464SJoe Eykholt struct fc_frame_header *fh = fc_frame_header_get(fp); 93596ad8464SJoe Eykholt struct fc_seq *sp = fr_seq(fp); 93696ad8464SJoe Eykholt struct fc4_prov *prov; 93796ad8464SJoe Eykholt 93896ad8464SJoe Eykholt /* 93996ad8464SJoe Eykholt * Use RCU read lock and module_lock to be sure module doesn't 94096ad8464SJoe Eykholt * deregister and get unloaded while we're calling it. 94196ad8464SJoe Eykholt * try_module_get() is inlined and accepts a NULL parameter. 94296ad8464SJoe Eykholt * Only ELSes and FCP target ops should come through here. 94396ad8464SJoe Eykholt * The locking is unfortunate, and a better scheme is being sought. 94496ad8464SJoe Eykholt */ 94596ad8464SJoe Eykholt 94696ad8464SJoe Eykholt rcu_read_lock(); 94796ad8464SJoe Eykholt if (fh->fh_type >= FC_FC4_PROV_SIZE) 94896ad8464SJoe Eykholt goto drop; 94996ad8464SJoe Eykholt prov = rcu_dereference(fc_passive_prov[fh->fh_type]); 95096ad8464SJoe Eykholt if (!prov || !try_module_get(prov->module)) 95196ad8464SJoe Eykholt goto drop; 95296ad8464SJoe Eykholt rcu_read_unlock(); 95396ad8464SJoe Eykholt prov->recv(lport, fp); 95496ad8464SJoe Eykholt module_put(prov->module); 95596ad8464SJoe Eykholt return; 95696ad8464SJoe Eykholt drop: 95796ad8464SJoe Eykholt rcu_read_unlock(); 95896ad8464SJoe Eykholt FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type); 95996ad8464SJoe Eykholt fc_frame_free(fp); 96096ad8464SJoe Eykholt lport->tt.exch_done(sp); 96196ad8464SJoe Eykholt } 96296ad8464SJoe Eykholt 96342e9a92fSRobert Love /** 9643a3b42bfSRobert Love * fc_lport_reset() - Reset a local port 9653a3b42bfSRobert Love * @lport: The local port which should be reset 96642e9a92fSRobert Love * 96742e9a92fSRobert Love * Locking Note: This functions should not be called with the 96842e9a92fSRobert Love * lport lock held. 96942e9a92fSRobert Love */ 97042e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 97142e9a92fSRobert Love { 972f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 97342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 97442e9a92fSRobert Love fc_lport_enter_reset(lport); 97542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 97642e9a92fSRobert Love return 0; 97742e9a92fSRobert Love } 97842e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 97942e9a92fSRobert Love 98042e9a92fSRobert Love /** 9813a3b42bfSRobert Love * fc_lport_reset_locked() - Reset the local port w/ the lport lock held 9823a3b42bfSRobert Love * @lport: The local port to be reset 98342e9a92fSRobert Love * 98442e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 98542e9a92fSRobert Love * this routine. 98642e9a92fSRobert Love */ 9871190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 98842e9a92fSRobert Love { 9893a3b42bfSRobert Love if (lport->dns_rdata) 9903a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 99142e9a92fSRobert Love 9922f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 9932f2ac4a0SJoe Eykholt lport->tt.rport_logoff(lport->ptp_rdata); 9942f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 9953a3b42bfSRobert Love lport->ptp_rdata = NULL; 9962f2ac4a0SJoe Eykholt } 99742e9a92fSRobert Love 99842e9a92fSRobert Love lport->tt.disc_stop(lport); 99942e9a92fSRobert Love 10001f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 100142e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 1002093bb6a2SJoe Eykholt 10033726f358SJoe Eykholt if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up)) 1004093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, 0, NULL); 10051190d925SJoe Eykholt } 100642e9a92fSRobert Love 10071190d925SJoe Eykholt /** 10081190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 10093a3b42bfSRobert Love * @lport: The local port to be reset 10101190d925SJoe Eykholt * 10111190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 10121190d925SJoe Eykholt * this routine. 10131190d925SJoe Eykholt */ 10141190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 10151190d925SJoe Eykholt { 10161190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 10171190d925SJoe Eykholt fc_lport_state(lport)); 10181190d925SJoe Eykholt 101955a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) 102055a66d3cSVasu Dev return; 102155a66d3cSVasu Dev 10228faecddbSChris Leech if (lport->vport) { 10238faecddbSChris Leech if (lport->link_up) 10248faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); 10258faecddbSChris Leech else 10268faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); 10278faecddbSChris Leech } 10281190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 10299b7d1613SVasu Dev fc_host_post_event(lport->host, fc_get_event_number(), 10309b7d1613SVasu Dev FCH_EVT_LIPRESET, 0); 10318faecddbSChris Leech fc_vports_linkchange(lport); 10321190d925SJoe Eykholt fc_lport_reset_locked(lport); 1033b6e3c840SVasu Dev if (lport->link_up) 103442e9a92fSRobert Love fc_lport_enter_flogi(lport); 103542e9a92fSRobert Love } 103642e9a92fSRobert Love 103742e9a92fSRobert Love /** 10383a3b42bfSRobert Love * fc_lport_enter_disabled() - Disable the local port 10393a3b42bfSRobert Love * @lport: The local port to be reset 10401190d925SJoe Eykholt * 10411190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 10421190d925SJoe Eykholt * this routine. 10431190d925SJoe Eykholt */ 10441190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 10451190d925SJoe Eykholt { 10461190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 10471190d925SJoe Eykholt fc_lport_state(lport)); 10481190d925SJoe Eykholt 10491190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 10508faecddbSChris Leech fc_vports_linkchange(lport); 10511190d925SJoe Eykholt fc_lport_reset_locked(lport); 10521190d925SJoe Eykholt } 10531190d925SJoe Eykholt 10541190d925SJoe Eykholt /** 105534f42a07SRobert Love * fc_lport_error() - Handler for any errors 10563a3b42bfSRobert Love * @lport: The local port that the error was on 10573a3b42bfSRobert Love * @fp: The error code encoded in a frame pointer 105842e9a92fSRobert Love * 105942e9a92fSRobert Love * If the error was caused by a resource allocation failure 106042e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 106142e9a92fSRobert Love * after the e_d_tov time. 106242e9a92fSRobert Love */ 106342e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 106442e9a92fSRobert Love { 106542e9a92fSRobert Love unsigned long delay = 0; 10667414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 106742e9a92fSRobert Love PTR_ERR(fp), fc_lport_state(lport), 106842e9a92fSRobert Love lport->retry_count); 106942e9a92fSRobert Love 10707f985231SBhanu Prakash Gollapudi if (PTR_ERR(fp) == -FC_EX_CLOSED) 10717f985231SBhanu Prakash Gollapudi return; 10727f985231SBhanu Prakash Gollapudi 107342e9a92fSRobert Love /* 10747f985231SBhanu Prakash Gollapudi * Memory allocation failure, or the exchange timed out 10757f985231SBhanu Prakash Gollapudi * or we received LS_RJT. 107642e9a92fSRobert Love * Retry after delay 107742e9a92fSRobert Love */ 107842e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 107942e9a92fSRobert Love lport->retry_count++; 108042e9a92fSRobert Love if (!fp) 108142e9a92fSRobert Love delay = msecs_to_jiffies(500); 108242e9a92fSRobert Love else 108342e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 108442e9a92fSRobert Love 108542e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 10867f985231SBhanu Prakash Gollapudi } else 108742e9a92fSRobert Love fc_lport_enter_reset(lport); 108842e9a92fSRobert Love } 108942e9a92fSRobert Love 109042e9a92fSRobert Love /** 10917cccc157SChris Leech * fc_lport_ns_resp() - Handle response to a name server 10927cccc157SChris Leech * registration exchange 10937cccc157SChris Leech * @sp: current sequence in exchange 109442e9a92fSRobert Love * @fp: response frame 109542e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 109642e9a92fSRobert Love * 109742e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 10983a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 109942e9a92fSRobert Love * and then unlock the lport. 110042e9a92fSRobert Love */ 11017cccc157SChris Leech static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, 110242e9a92fSRobert Love void *lp_arg) 110342e9a92fSRobert Love { 110442e9a92fSRobert Love struct fc_lport *lport = lp_arg; 110542e9a92fSRobert Love struct fc_frame_header *fh; 110642e9a92fSRobert Love struct fc_ct_hdr *ct; 110742e9a92fSRobert Love 11087cccc157SChris Leech FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); 1109f657d299SJoe Eykholt 111042e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 111142e9a92fSRobert Love return; 111242e9a92fSRobert Love 111342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 111442e9a92fSRobert Love 1115ab593b18SJoe Eykholt if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { 11167cccc157SChris Leech FC_LPORT_DBG(lport, "Received a name server response, " 11177cccc157SChris Leech "but in state %s\n", fc_lport_state(lport)); 111876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 111976f6804eSAbhijeet Joglekar goto err; 112042e9a92fSRobert Love goto out; 112142e9a92fSRobert Love } 112242e9a92fSRobert Love 112376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 112476f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 112576f6804eSAbhijeet Joglekar goto err; 112676f6804eSAbhijeet Joglekar } 112776f6804eSAbhijeet Joglekar 112842e9a92fSRobert Love fh = fc_frame_header_get(fp); 112942e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 113042e9a92fSRobert Love 113142e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 113242e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 113342e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 113442e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 11357cccc157SChris Leech switch (lport->state) { 11367cccc157SChris Leech case LPORT_ST_RNN_ID: 1137c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); 11387cccc157SChris Leech break; 11397cccc157SChris Leech case LPORT_ST_RSNN_NN: 1140c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); 11417cccc157SChris Leech break; 11427cccc157SChris Leech case LPORT_ST_RSPN_ID: 1143c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 11447cccc157SChris Leech break; 11457cccc157SChris Leech case LPORT_ST_RFT_ID: 1146ab593b18SJoe Eykholt fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); 1147ab593b18SJoe Eykholt break; 1148ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 11497cccc157SChris Leech fc_lport_enter_scr(lport); 11507cccc157SChris Leech break; 11517cccc157SChris Leech default: 11527cccc157SChris Leech /* should have already been caught by state checks */ 11537cccc157SChris Leech break; 11547cccc157SChris Leech } 1155c9c7bd7aSChris Leech else 1156c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1157c9c7bd7aSChris Leech out: 1158c9c7bd7aSChris Leech fc_frame_free(fp); 1159c9c7bd7aSChris Leech err: 1160c9c7bd7aSChris Leech mutex_unlock(&lport->lp_mutex); 1161c9c7bd7aSChris Leech } 1162c9c7bd7aSChris Leech 1163c9c7bd7aSChris Leech /** 116434f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 116542e9a92fSRobert Love * @sp: current sequence in SCR exchange 116642e9a92fSRobert Love * @fp: response frame 116742e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 116842e9a92fSRobert Love * 116942e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 117042e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 117142e9a92fSRobert Love * and then unlock the lport. 117242e9a92fSRobert Love */ 117342e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 117442e9a92fSRobert Love void *lp_arg) 117542e9a92fSRobert Love { 117642e9a92fSRobert Love struct fc_lport *lport = lp_arg; 117742e9a92fSRobert Love u8 op; 117842e9a92fSRobert Love 1179f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1180f657d299SJoe Eykholt 118142e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 118242e9a92fSRobert Love return; 118342e9a92fSRobert Love 118442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 118542e9a92fSRobert Love 118642e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 11877414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 11887414705eSRobert Love "%s\n", fc_lport_state(lport)); 118976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 119076f6804eSAbhijeet Joglekar goto err; 119142e9a92fSRobert Love goto out; 119242e9a92fSRobert Love } 119342e9a92fSRobert Love 119476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 119576f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 119676f6804eSAbhijeet Joglekar goto err; 119776f6804eSAbhijeet Joglekar } 119876f6804eSAbhijeet Joglekar 119942e9a92fSRobert Love op = fc_frame_payload_op(fp); 120042e9a92fSRobert Love if (op == ELS_LS_ACC) 120142e9a92fSRobert Love fc_lport_enter_ready(lport); 120242e9a92fSRobert Love else 120342e9a92fSRobert Love fc_lport_error(lport, fp); 120442e9a92fSRobert Love 120542e9a92fSRobert Love out: 120642e9a92fSRobert Love fc_frame_free(fp); 120742e9a92fSRobert Love err: 120842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 120942e9a92fSRobert Love } 121042e9a92fSRobert Love 121142e9a92fSRobert Love /** 12123a3b42bfSRobert Love * fc_lport_enter_scr() - Send a SCR (State Change Register) request 12133a3b42bfSRobert Love * @lport: The local port to register for state changes 121442e9a92fSRobert Love * 121542e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 121642e9a92fSRobert Love * this routine. 121742e9a92fSRobert Love */ 121842e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 121942e9a92fSRobert Love { 122042e9a92fSRobert Love struct fc_frame *fp; 122142e9a92fSRobert Love 12227414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 12237414705eSRobert Love fc_lport_state(lport)); 122442e9a92fSRobert Love 122542e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 122642e9a92fSRobert Love 122742e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 122842e9a92fSRobert Love if (!fp) { 122942e9a92fSRobert Love fc_lport_error(lport, fp); 123042e9a92fSRobert Love return; 123142e9a92fSRobert Love } 123242e9a92fSRobert Love 1233a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 1234b94f8951SJoe Eykholt fc_lport_scr_resp, lport, 1235b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 12368f550f93SChris Leech fc_lport_error(lport, NULL); 123742e9a92fSRobert Love } 123842e9a92fSRobert Love 123942e9a92fSRobert Love /** 1240c914f7d1SChris Leech * fc_lport_enter_ns() - register some object with the name server 124142e9a92fSRobert Love * @lport: Fibre Channel local port to register 124242e9a92fSRobert Love * 124342e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 124442e9a92fSRobert Love * this routine. 124542e9a92fSRobert Love */ 1246c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) 124742e9a92fSRobert Love { 124842e9a92fSRobert Love struct fc_frame *fp; 1249c914f7d1SChris Leech enum fc_ns_req cmd; 1250c914f7d1SChris Leech int size = sizeof(struct fc_ct_hdr); 1251c914f7d1SChris Leech size_t len; 125242e9a92fSRobert Love 1253c914f7d1SChris Leech FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1254c914f7d1SChris Leech fc_lport_state_names[state], 12557414705eSRobert Love fc_lport_state(lport)); 125642e9a92fSRobert Love 1257c914f7d1SChris Leech fc_lport_state_enter(lport, state); 125842e9a92fSRobert Love 1259c914f7d1SChris Leech switch (state) { 1260c914f7d1SChris Leech case LPORT_ST_RNN_ID: 1261c914f7d1SChris Leech cmd = FC_NS_RNN_ID; 1262c914f7d1SChris Leech size += sizeof(struct fc_ns_rn_id); 126342e9a92fSRobert Love break; 1264c914f7d1SChris Leech case LPORT_ST_RSNN_NN: 1265c9866a54SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1266c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1267c914f7d1SChris Leech if (!len) 1268c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1269c914f7d1SChris Leech cmd = FC_NS_RSNN_NN; 1270c914f7d1SChris Leech size += sizeof(struct fc_ns_rsnn) + len; 1271c914f7d1SChris Leech break; 1272c914f7d1SChris Leech case LPORT_ST_RSPN_ID: 12735baa17c3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1274c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1275c914f7d1SChris Leech if (!len) 1276c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1277c914f7d1SChris Leech cmd = FC_NS_RSPN_ID; 1278c914f7d1SChris Leech size += sizeof(struct fc_ns_rspn) + len; 1279c914f7d1SChris Leech break; 1280c914f7d1SChris Leech case LPORT_ST_RFT_ID: 1281c914f7d1SChris Leech cmd = FC_NS_RFT_ID; 1282c914f7d1SChris Leech size += sizeof(struct fc_ns_rft); 1283c914f7d1SChris Leech break; 1284ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1285ab593b18SJoe Eykholt cmd = FC_NS_RFF_ID; 1286ab593b18SJoe Eykholt size += sizeof(struct fc_ns_rff_id); 1287ab593b18SJoe Eykholt break; 1288c914f7d1SChris Leech default: 1289c914f7d1SChris Leech fc_lport_error(lport, NULL); 1290c914f7d1SChris Leech return; 1291c914f7d1SChris Leech } 1292c914f7d1SChris Leech 1293c914f7d1SChris Leech fp = fc_frame_alloc(lport, size); 12945baa17c3SChris Leech if (!fp) { 12955baa17c3SChris Leech fc_lport_error(lport, fp); 12965baa17c3SChris Leech return; 12975baa17c3SChris Leech } 12985baa17c3SChris Leech 1299c914f7d1SChris Leech if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, 13007cccc157SChris Leech fc_lport_ns_resp, 1301b94f8951SJoe Eykholt lport, 3 * lport->r_a_tov)) 1302c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1303c9c7bd7aSChris Leech } 1304c9c7bd7aSChris Leech 130542e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 130642e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 130742e9a92fSRobert Love }; 130842e9a92fSRobert Love 130942e9a92fSRobert Love /** 13103a3b42bfSRobert Love * fc_rport_enter_dns() - Create a fc_rport for the name server 13113a3b42bfSRobert Love * @lport: The local port requesting a remote port for the name server 131242e9a92fSRobert Love * 131342e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 131442e9a92fSRobert Love * this routine. 131542e9a92fSRobert Love */ 131642e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 131742e9a92fSRobert Love { 1318ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 131942e9a92fSRobert Love 13207414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 13217414705eSRobert Love fc_lport_state(lport)); 132242e9a92fSRobert Love 132342e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 132442e9a92fSRobert Love 132548f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 13269737e6a7SRobert Love rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); 132748f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 13289fb9d328SJoe Eykholt if (!rdata) 132942e9a92fSRobert Love goto err; 133042e9a92fSRobert Love 133142e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 13329fb9d328SJoe Eykholt lport->tt.rport_login(rdata); 133342e9a92fSRobert Love return; 133442e9a92fSRobert Love 133542e9a92fSRobert Love err: 133642e9a92fSRobert Love fc_lport_error(lport, NULL); 133742e9a92fSRobert Love } 133842e9a92fSRobert Love 133942e9a92fSRobert Love /** 13403a3b42bfSRobert Love * fc_lport_timeout() - Handler for the retry_work timer 13413a3b42bfSRobert Love * @work: The work struct of the local port 134242e9a92fSRobert Love */ 134342e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 134442e9a92fSRobert Love { 134542e9a92fSRobert Love struct fc_lport *lport = 134642e9a92fSRobert Love container_of(work, struct fc_lport, 134742e9a92fSRobert Love retry_work.work); 134842e9a92fSRobert Love 134942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 135042e9a92fSRobert Love 135142e9a92fSRobert Love switch (lport->state) { 1352b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 135342e9a92fSRobert Love WARN_ON(1); 135442e9a92fSRobert Love break; 135522655ac2SJoe Eykholt case LPORT_ST_READY: 135622655ac2SJoe Eykholt break; 135722655ac2SJoe Eykholt case LPORT_ST_RESET: 135822655ac2SJoe Eykholt break; 135942e9a92fSRobert Love case LPORT_ST_FLOGI: 136042e9a92fSRobert Love fc_lport_enter_flogi(lport); 136142e9a92fSRobert Love break; 136242e9a92fSRobert Love case LPORT_ST_DNS: 136342e9a92fSRobert Love fc_lport_enter_dns(lport); 136442e9a92fSRobert Love break; 1365c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 13665baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1367c9866a54SChris Leech case LPORT_ST_RSPN_ID: 136842e9a92fSRobert Love case LPORT_ST_RFT_ID: 1369ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1370c914f7d1SChris Leech fc_lport_enter_ns(lport, lport->state); 137142e9a92fSRobert Love break; 137242e9a92fSRobert Love case LPORT_ST_SCR: 137342e9a92fSRobert Love fc_lport_enter_scr(lport); 137442e9a92fSRobert Love break; 137542e9a92fSRobert Love case LPORT_ST_LOGO: 137642e9a92fSRobert Love fc_lport_enter_logo(lport); 137742e9a92fSRobert Love break; 137842e9a92fSRobert Love } 137942e9a92fSRobert Love 138042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 138142e9a92fSRobert Love } 138242e9a92fSRobert Love 138342e9a92fSRobert Love /** 138434f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 13853a3b42bfSRobert Love * @sp: The sequence that the LOGO was on 13863a3b42bfSRobert Love * @fp: The LOGO frame 13873a3b42bfSRobert Love * @lp_arg: The lport port that received the LOGO request 138842e9a92fSRobert Love * 138942e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 13903a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 139142e9a92fSRobert Love * and then unlock the lport. 139242e9a92fSRobert Love */ 139311b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 139442e9a92fSRobert Love void *lp_arg) 139542e9a92fSRobert Love { 139642e9a92fSRobert Love struct fc_lport *lport = lp_arg; 139742e9a92fSRobert Love u8 op; 139842e9a92fSRobert Love 1399f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1400f657d299SJoe Eykholt 140142e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 140242e9a92fSRobert Love return; 140342e9a92fSRobert Love 140442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 140542e9a92fSRobert Love 140642e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 14077414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 14087414705eSRobert Love "%s\n", fc_lport_state(lport)); 140976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 141076f6804eSAbhijeet Joglekar goto err; 141142e9a92fSRobert Love goto out; 141242e9a92fSRobert Love } 141342e9a92fSRobert Love 141476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 141576f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 141676f6804eSAbhijeet Joglekar goto err; 141776f6804eSAbhijeet Joglekar } 141876f6804eSAbhijeet Joglekar 141942e9a92fSRobert Love op = fc_frame_payload_op(fp); 142042e9a92fSRobert Love if (op == ELS_LS_ACC) 14211190d925SJoe Eykholt fc_lport_enter_disabled(lport); 142242e9a92fSRobert Love else 142342e9a92fSRobert Love fc_lport_error(lport, fp); 142442e9a92fSRobert Love 142542e9a92fSRobert Love out: 142642e9a92fSRobert Love fc_frame_free(fp); 142742e9a92fSRobert Love err: 142842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 142942e9a92fSRobert Love } 143011b56188SChris Leech EXPORT_SYMBOL(fc_lport_logo_resp); 143142e9a92fSRobert Love 143242e9a92fSRobert Love /** 143334f42a07SRobert Love * fc_rport_enter_logo() - Logout of the fabric 14343a3b42bfSRobert Love * @lport: The local port to be logged out 143542e9a92fSRobert Love * 143642e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 143742e9a92fSRobert Love * this routine. 143842e9a92fSRobert Love */ 143942e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 144042e9a92fSRobert Love { 144142e9a92fSRobert Love struct fc_frame *fp; 144242e9a92fSRobert Love struct fc_els_logo *logo; 144342e9a92fSRobert Love 14447414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 14457414705eSRobert Love fc_lport_state(lport)); 144642e9a92fSRobert Love 144742e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 14488faecddbSChris Leech fc_vports_linkchange(lport); 144942e9a92fSRobert Love 145042e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 145142e9a92fSRobert Love if (!fp) { 145242e9a92fSRobert Love fc_lport_error(lport, fp); 145342e9a92fSRobert Love return; 145442e9a92fSRobert Love } 145542e9a92fSRobert Love 1456a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1457b94f8951SJoe Eykholt fc_lport_logo_resp, lport, 1458b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 14598f550f93SChris Leech fc_lport_error(lport, NULL); 146042e9a92fSRobert Love } 146142e9a92fSRobert Love 146242e9a92fSRobert Love /** 146334f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 14643a3b42bfSRobert Love * @sp: The sequence that the FLOGI was on 14653a3b42bfSRobert Love * @fp: The FLOGI response frame 14663a3b42bfSRobert Love * @lp_arg: The lport port that received the FLOGI response 146742e9a92fSRobert Love * 146842e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 14693a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 147042e9a92fSRobert Love * and then unlock the lport. 147142e9a92fSRobert Love */ 147211b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 147342e9a92fSRobert Love void *lp_arg) 147442e9a92fSRobert Love { 147542e9a92fSRobert Love struct fc_lport *lport = lp_arg; 1476907c07d4SVasu Dev struct fc_frame_header *fh; 147742e9a92fSRobert Love struct fc_els_flogi *flp; 147842e9a92fSRobert Love u32 did; 147942e9a92fSRobert Love u16 csp_flags; 148042e9a92fSRobert Love unsigned int r_a_tov; 148142e9a92fSRobert Love unsigned int e_d_tov; 148242e9a92fSRobert Love u16 mfs; 148342e9a92fSRobert Love 1484f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1485f657d299SJoe Eykholt 148642e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 148742e9a92fSRobert Love return; 148842e9a92fSRobert Love 148942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 149042e9a92fSRobert Love 149142e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 14927414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 14937414705eSRobert Love "%s\n", fc_lport_state(lport)); 149476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 149576f6804eSAbhijeet Joglekar goto err; 149642e9a92fSRobert Love goto out; 149742e9a92fSRobert Love } 149842e9a92fSRobert Love 149976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 150076f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 150176f6804eSAbhijeet Joglekar goto err; 150276f6804eSAbhijeet Joglekar } 150376f6804eSAbhijeet Joglekar 1504907c07d4SVasu Dev fh = fc_frame_header_get(fp); 1505251748a9SJoe Eykholt did = fc_frame_did(fp); 1506907c07d4SVasu Dev if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 || 1507907c07d4SVasu Dev fc_frame_payload_op(fp) != ELS_LS_ACC) { 1508907c07d4SVasu Dev FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n"); 1509907c07d4SVasu Dev fc_lport_error(lport, fp); 1510907c07d4SVasu Dev goto err; 1511907c07d4SVasu Dev } 1512907c07d4SVasu Dev 151342e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 1514907c07d4SVasu Dev if (!flp) { 1515907c07d4SVasu Dev FC_LPORT_DBG(lport, "FLOGI bad response\n"); 1516907c07d4SVasu Dev fc_lport_error(lport, fp); 1517907c07d4SVasu Dev goto err; 1518907c07d4SVasu Dev } 1519907c07d4SVasu Dev 152042e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 152142e9a92fSRobert Love FC_SP_BB_DATA_MASK; 152242e9a92fSRobert Love if (mfs >= FC_SP_MIN_MAX_PAYLOAD && 152342e9a92fSRobert Love mfs < lport->mfs) 152442e9a92fSRobert Love lport->mfs = mfs; 152542e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 152642e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 152742e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 152842e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 152942e9a92fSRobert Love e_d_tov /= 1000000; 1530db36c06cSChris Leech 1531db36c06cSChris Leech lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); 1532db36c06cSChris Leech 153342e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 153442e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 153542e9a92fSRobert Love lport->e_d_tov = e_d_tov; 153642e9a92fSRobert Love lport->r_a_tov = 2 * e_d_tov; 1537093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 1538e6d8a1b0SJoe Eykholt printk(KERN_INFO "host%d: libfc: " 1539ce8b5df0SChris Leech "Port (%6.6x) entered " 1540e6d8a1b0SJoe Eykholt "point-to-point mode\n", 1541e6d8a1b0SJoe Eykholt lport->host->host_no, did); 1542251748a9SJoe Eykholt fc_lport_ptp_setup(lport, fc_frame_sid(fp), 154342e9a92fSRobert Love get_unaligned_be64( 154442e9a92fSRobert Love &flp->fl_wwpn), 154542e9a92fSRobert Love get_unaligned_be64( 154642e9a92fSRobert Love &flp->fl_wwnn)); 154742e9a92fSRobert Love } else { 154842e9a92fSRobert Love lport->e_d_tov = e_d_tov; 154942e9a92fSRobert Love lport->r_a_tov = r_a_tov; 155042e9a92fSRobert Love fc_host_fabric_name(lport->host) = 155142e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 1552093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 155342e9a92fSRobert Love fc_lport_enter_dns(lport); 155442e9a92fSRobert Love } 155542e9a92fSRobert Love 155642e9a92fSRobert Love out: 155742e9a92fSRobert Love fc_frame_free(fp); 155842e9a92fSRobert Love err: 155942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 156042e9a92fSRobert Love } 156111b56188SChris Leech EXPORT_SYMBOL(fc_lport_flogi_resp); 156242e9a92fSRobert Love 156342e9a92fSRobert Love /** 156434f42a07SRobert Love * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager 156542e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 156642e9a92fSRobert Love * 156742e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 156842e9a92fSRobert Love * this routine. 156942e9a92fSRobert Love */ 157042e9a92fSRobert Love void fc_lport_enter_flogi(struct fc_lport *lport) 157142e9a92fSRobert Love { 157242e9a92fSRobert Love struct fc_frame *fp; 157342e9a92fSRobert Love 15747414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 15757414705eSRobert Love fc_lport_state(lport)); 157642e9a92fSRobert Love 157742e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 157842e9a92fSRobert Love 15793726f358SJoe Eykholt if (lport->point_to_multipoint) { 15803726f358SJoe Eykholt if (lport->port_id) 15813726f358SJoe Eykholt fc_lport_enter_ready(lport); 15823726f358SJoe Eykholt return; 15833726f358SJoe Eykholt } 15843726f358SJoe Eykholt 158542e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 158642e9a92fSRobert Love if (!fp) 158742e9a92fSRobert Love return fc_lport_error(lport, fp); 158842e9a92fSRobert Love 1589db36c06cSChris Leech if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, 1590db36c06cSChris Leech lport->vport ? ELS_FDISC : ELS_FLOGI, 1591b94f8951SJoe Eykholt fc_lport_flogi_resp, lport, 1592b94f8951SJoe Eykholt lport->vport ? 2 * lport->r_a_tov : 1593b94f8951SJoe Eykholt lport->e_d_tov)) 15948f550f93SChris Leech fc_lport_error(lport, NULL); 159542e9a92fSRobert Love } 159642e9a92fSRobert Love 15973a3b42bfSRobert Love /** 15983a3b42bfSRobert Love * fc_lport_config() - Configure a fc_lport 15993a3b42bfSRobert Love * @lport: The local port to be configured 16003a3b42bfSRobert Love */ 160142e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 160242e9a92fSRobert Love { 160342e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 160442e9a92fSRobert Love mutex_init(&lport->lp_mutex); 160542e9a92fSRobert Love 1606b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 160742e9a92fSRobert Love 160842e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 160942e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 1610acc1a921SKiran Patil fc_fc4_conf_lport_params(lport, FC_TYPE_FCP); 161142e9a92fSRobert Love 161242e9a92fSRobert Love return 0; 161342e9a92fSRobert Love } 161442e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 161542e9a92fSRobert Love 16163a3b42bfSRobert Love /** 16173a3b42bfSRobert Love * fc_lport_init() - Initialize the lport layer for a local port 16183a3b42bfSRobert Love * @lport: The local port to initialize the exchange layer for 16193a3b42bfSRobert Love */ 162042e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 162142e9a92fSRobert Love { 162242e9a92fSRobert Love if (!lport->tt.lport_recv) 162342e9a92fSRobert Love lport->tt.lport_recv = fc_lport_recv_req; 162442e9a92fSRobert Love 162542e9a92fSRobert Love if (!lport->tt.lport_reset) 162642e9a92fSRobert Love lport->tt.lport_reset = fc_lport_reset; 162742e9a92fSRobert Love 162842e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 162942e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 163042e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 163142e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 163242e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 163342e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 163442e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 163542e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 163642e9a92fSRobert Love 163742e9a92fSRobert Love /* This value is also unchanging */ 163842e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 163942e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 164042e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 164142e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 164242e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 164342e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 164442e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 164542e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 164642e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 164742e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 164870d53b04SJoe Eykholt fc_fc4_add_lport(lport); 164942e9a92fSRobert Love 165042e9a92fSRobert Love return 0; 165142e9a92fSRobert Love } 165242e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1653a51ab396SSteve Ma 1654a51ab396SSteve Ma /** 16553a3b42bfSRobert Love * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests 16563a3b42bfSRobert Love * @sp: The sequence for the FC Passthrough response 16573a3b42bfSRobert Love * @fp: The response frame 16583a3b42bfSRobert Love * @info_arg: The BSG info that the response is for 1659a51ab396SSteve Ma */ 1660a51ab396SSteve Ma static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, 1661a51ab396SSteve Ma void *info_arg) 1662a51ab396SSteve Ma { 1663a51ab396SSteve Ma struct fc_bsg_info *info = info_arg; 1664a51ab396SSteve Ma struct fc_bsg_job *job = info->job; 1665a51ab396SSteve Ma struct fc_lport *lport = info->lport; 1666a51ab396SSteve Ma struct fc_frame_header *fh; 1667a51ab396SSteve Ma size_t len; 1668a51ab396SSteve Ma void *buf; 1669a51ab396SSteve Ma 1670a51ab396SSteve Ma if (IS_ERR(fp)) { 1671a51ab396SSteve Ma job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? 1672a51ab396SSteve Ma -ECONNABORTED : -ETIMEDOUT; 1673a51ab396SSteve Ma job->reply_len = sizeof(uint32_t); 1674a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1675a51ab396SSteve Ma job->job_done(job); 1676a51ab396SSteve Ma kfree(info); 1677a51ab396SSteve Ma return; 1678a51ab396SSteve Ma } 1679a51ab396SSteve Ma 1680a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1681a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1682a51ab396SSteve Ma len = fr_len(fp) - sizeof(*fh); 1683a51ab396SSteve Ma buf = fc_frame_payload_get(fp, 0); 1684a51ab396SSteve Ma 1685a51ab396SSteve Ma if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { 1686a51ab396SSteve Ma /* Get the response code from the first frame payload */ 1687a51ab396SSteve Ma unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? 1688a51ab396SSteve Ma ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : 1689a51ab396SSteve Ma (unsigned short)fc_frame_payload_op(fp); 1690a51ab396SSteve Ma 1691a51ab396SSteve Ma /* Save the reply status of the job */ 1692a51ab396SSteve Ma job->reply->reply_data.ctels_reply.status = 1693a51ab396SSteve Ma (cmd == info->rsp_code) ? 1694a51ab396SSteve Ma FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; 1695a51ab396SSteve Ma } 1696a51ab396SSteve Ma 1697a51ab396SSteve Ma job->reply->reply_payload_rcv_len += 1698a51ab396SSteve Ma fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, 1699a51ab396SSteve Ma &info->offset, KM_BIO_SRC_IRQ, NULL); 1700a51ab396SSteve Ma 1701a51ab396SSteve Ma if (fr_eof(fp) == FC_EOF_T && 1702a51ab396SSteve Ma (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == 1703a51ab396SSteve Ma (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { 1704a51ab396SSteve Ma if (job->reply->reply_payload_rcv_len > 1705a51ab396SSteve Ma job->reply_payload.payload_len) 1706a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 1707a51ab396SSteve Ma job->reply_payload.payload_len; 1708a51ab396SSteve Ma job->reply->result = 0; 1709a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1710a51ab396SSteve Ma job->job_done(job); 1711a51ab396SSteve Ma kfree(info); 1712a51ab396SSteve Ma } 1713a51ab396SSteve Ma fc_frame_free(fp); 1714a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1715a51ab396SSteve Ma } 1716a51ab396SSteve Ma 1717a51ab396SSteve Ma /** 17183a3b42bfSRobert Love * fc_lport_els_request() - Send ELS passthrough request 17193a3b42bfSRobert Love * @job: The BSG Passthrough job 1720a51ab396SSteve Ma * @lport: The local port sending the request 17213a3b42bfSRobert Love * @did: The destination port id 1722a51ab396SSteve Ma * 1723a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1724a51ab396SSteve Ma * this routine. 1725a51ab396SSteve Ma */ 1726a51ab396SSteve Ma static int fc_lport_els_request(struct fc_bsg_job *job, 1727a51ab396SSteve Ma struct fc_lport *lport, 1728a51ab396SSteve Ma u32 did, u32 tov) 1729a51ab396SSteve Ma { 1730a51ab396SSteve Ma struct fc_bsg_info *info; 1731a51ab396SSteve Ma struct fc_frame *fp; 1732a51ab396SSteve Ma struct fc_frame_header *fh; 1733a51ab396SSteve Ma char *pp; 1734a51ab396SSteve Ma int len; 1735a51ab396SSteve Ma 173670d919fbSYi Zou fp = fc_frame_alloc(lport, job->request_payload.payload_len); 1737a51ab396SSteve Ma if (!fp) 1738a51ab396SSteve Ma return -ENOMEM; 1739a51ab396SSteve Ma 1740a51ab396SSteve Ma len = job->request_payload.payload_len; 1741a51ab396SSteve Ma pp = fc_frame_payload_get(fp, len); 1742a51ab396SSteve Ma 1743a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1744a51ab396SSteve Ma job->request_payload.sg_cnt, 1745a51ab396SSteve Ma pp, len); 1746a51ab396SSteve Ma 1747a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1748a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_ELS_REQ; 1749a51ab396SSteve Ma hton24(fh->fh_d_id, did); 17507b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1751a51ab396SSteve Ma fh->fh_type = FC_TYPE_ELS; 175224f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 1753a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1754a51ab396SSteve Ma fh->fh_df_ctl = 0; 1755a51ab396SSteve Ma fh->fh_parm_offset = 0; 1756a51ab396SSteve Ma 1757a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1758a51ab396SSteve Ma if (!info) { 1759a51ab396SSteve Ma fc_frame_free(fp); 1760a51ab396SSteve Ma return -ENOMEM; 1761a51ab396SSteve Ma } 1762a51ab396SSteve Ma 1763a51ab396SSteve Ma info->job = job; 1764a51ab396SSteve Ma info->lport = lport; 1765a51ab396SSteve Ma info->rsp_code = ELS_LS_ACC; 1766a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1767a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1768a51ab396SSteve Ma 1769a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 177072e0daadSHillf Danton NULL, info, tov)) { 177172e0daadSHillf Danton kfree(info); 1772a51ab396SSteve Ma return -ECOMM; 177372e0daadSHillf Danton } 1774a51ab396SSteve Ma return 0; 1775a51ab396SSteve Ma } 1776a51ab396SSteve Ma 1777a51ab396SSteve Ma /** 17783a3b42bfSRobert Love * fc_lport_ct_request() - Send CT Passthrough request 17793a3b42bfSRobert Love * @job: The BSG Passthrough job 1780a51ab396SSteve Ma * @lport: The local port sending the request 1781a51ab396SSteve Ma * @did: The destination FC-ID 17823a3b42bfSRobert Love * @tov: The timeout period to wait for the response 1783a51ab396SSteve Ma * 1784a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1785a51ab396SSteve Ma * this routine. 1786a51ab396SSteve Ma */ 1787a51ab396SSteve Ma static int fc_lport_ct_request(struct fc_bsg_job *job, 1788a51ab396SSteve Ma struct fc_lport *lport, u32 did, u32 tov) 1789a51ab396SSteve Ma { 1790a51ab396SSteve Ma struct fc_bsg_info *info; 1791a51ab396SSteve Ma struct fc_frame *fp; 1792a51ab396SSteve Ma struct fc_frame_header *fh; 1793a51ab396SSteve Ma struct fc_ct_req *ct; 1794a51ab396SSteve Ma size_t len; 1795a51ab396SSteve Ma 1796a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 1797a51ab396SSteve Ma job->request_payload.payload_len); 1798a51ab396SSteve Ma if (!fp) 1799a51ab396SSteve Ma return -ENOMEM; 1800a51ab396SSteve Ma 1801a51ab396SSteve Ma len = job->request_payload.payload_len; 1802a51ab396SSteve Ma ct = fc_frame_payload_get(fp, len); 1803a51ab396SSteve Ma 1804a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1805a51ab396SSteve Ma job->request_payload.sg_cnt, 1806a51ab396SSteve Ma ct, len); 1807a51ab396SSteve Ma 1808a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1809a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; 1810a51ab396SSteve Ma hton24(fh->fh_d_id, did); 18117b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1812a51ab396SSteve Ma fh->fh_type = FC_TYPE_CT; 181324f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 1814a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1815a51ab396SSteve Ma fh->fh_df_ctl = 0; 1816a51ab396SSteve Ma fh->fh_parm_offset = 0; 1817a51ab396SSteve Ma 1818a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1819a51ab396SSteve Ma if (!info) { 1820a51ab396SSteve Ma fc_frame_free(fp); 1821a51ab396SSteve Ma return -ENOMEM; 1822a51ab396SSteve Ma } 1823a51ab396SSteve Ma 1824a51ab396SSteve Ma info->job = job; 1825a51ab396SSteve Ma info->lport = lport; 1826a51ab396SSteve Ma info->rsp_code = FC_FS_ACC; 1827a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1828a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1829a51ab396SSteve Ma 1830a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 18312d6dfb00SHillf Danton NULL, info, tov)) { 18322d6dfb00SHillf Danton kfree(info); 1833a51ab396SSteve Ma return -ECOMM; 18342d6dfb00SHillf Danton } 1835a51ab396SSteve Ma return 0; 1836a51ab396SSteve Ma } 1837a51ab396SSteve Ma 1838a51ab396SSteve Ma /** 1839a51ab396SSteve Ma * fc_lport_bsg_request() - The common entry point for sending 18403a3b42bfSRobert Love * FC Passthrough requests 18413a3b42bfSRobert Love * @job: The BSG passthrough job 1842a51ab396SSteve Ma */ 1843a51ab396SSteve Ma int fc_lport_bsg_request(struct fc_bsg_job *job) 1844a51ab396SSteve Ma { 1845a51ab396SSteve Ma struct request *rsp = job->req->next_rq; 1846a51ab396SSteve Ma struct Scsi_Host *shost = job->shost; 1847a51ab396SSteve Ma struct fc_lport *lport = shost_priv(shost); 1848a51ab396SSteve Ma struct fc_rport *rport; 1849a51ab396SSteve Ma struct fc_rport_priv *rdata; 1850a51ab396SSteve Ma int rc = -EINVAL; 1851a51ab396SSteve Ma u32 did; 1852a51ab396SSteve Ma 1853a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 0; 1854b248df30SHugh Daschbach if (rsp) 1855a51ab396SSteve Ma rsp->resid_len = job->reply_payload.payload_len; 1856a51ab396SSteve Ma 1857a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1858a51ab396SSteve Ma 1859a51ab396SSteve Ma switch (job->request->msgcode) { 1860a51ab396SSteve Ma case FC_BSG_RPT_ELS: 1861a51ab396SSteve Ma rport = job->rport; 1862a51ab396SSteve Ma if (!rport) 1863a51ab396SSteve Ma break; 1864a51ab396SSteve Ma 1865a51ab396SSteve Ma rdata = rport->dd_data; 1866a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, rport->port_id, 1867a51ab396SSteve Ma rdata->e_d_tov); 1868a51ab396SSteve Ma break; 1869a51ab396SSteve Ma 1870a51ab396SSteve Ma case FC_BSG_RPT_CT: 1871a51ab396SSteve Ma rport = job->rport; 1872a51ab396SSteve Ma if (!rport) 1873a51ab396SSteve Ma break; 1874a51ab396SSteve Ma 1875a51ab396SSteve Ma rdata = rport->dd_data; 1876a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, rport->port_id, 1877a51ab396SSteve Ma rdata->e_d_tov); 1878a51ab396SSteve Ma break; 1879a51ab396SSteve Ma 1880a51ab396SSteve Ma case FC_BSG_HST_CT: 1881a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_ct.port_id); 1882a51ab396SSteve Ma if (did == FC_FID_DIR_SERV) 18833a3b42bfSRobert Love rdata = lport->dns_rdata; 1884a51ab396SSteve Ma else 1885a51ab396SSteve Ma rdata = lport->tt.rport_lookup(lport, did); 1886a51ab396SSteve Ma 1887a51ab396SSteve Ma if (!rdata) 1888a51ab396SSteve Ma break; 1889a51ab396SSteve Ma 1890a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); 1891a51ab396SSteve Ma break; 1892a51ab396SSteve Ma 1893a51ab396SSteve Ma case FC_BSG_HST_ELS_NOLOGIN: 1894a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_els.port_id); 1895a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); 1896a51ab396SSteve Ma break; 1897a51ab396SSteve Ma } 1898a51ab396SSteve Ma 1899a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1900a51ab396SSteve Ma return rc; 1901a51ab396SSteve Ma } 1902a51ab396SSteve Ma EXPORT_SYMBOL(fc_lport_bsg_request); 1903