142e9a92fSRobert Love /* 242e9a92fSRobert Love * Copyright(c) 2007 Intel Corporation. All rights reserved. 342e9a92fSRobert Love * 442e9a92fSRobert Love * This program is free software; you can redistribute it and/or modify it 542e9a92fSRobert Love * under the terms and conditions of the GNU General Public License, 642e9a92fSRobert Love * version 2, as published by the Free Software Foundation. 742e9a92fSRobert Love * 842e9a92fSRobert Love * This program is distributed in the hope it will be useful, but WITHOUT 942e9a92fSRobert Love * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1042e9a92fSRobert Love * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1142e9a92fSRobert Love * more details. 1242e9a92fSRobert Love * 1342e9a92fSRobert Love * You should have received a copy of the GNU General Public License along with 1442e9a92fSRobert Love * this program; if not, write to the Free Software Foundation, Inc., 1542e9a92fSRobert Love * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 1642e9a92fSRobert Love * 1742e9a92fSRobert Love * Maintained at www.Open-FCoE.org 1842e9a92fSRobert Love */ 1942e9a92fSRobert Love 2042e9a92fSRobert Love /* 2142e9a92fSRobert Love * PORT LOCKING NOTES 2242e9a92fSRobert Love * 2342e9a92fSRobert Love * These comments only apply to the 'port code' which consists of the lport, 2442e9a92fSRobert Love * disc and rport blocks. 2542e9a92fSRobert Love * 2642e9a92fSRobert Love * MOTIVATION 2742e9a92fSRobert Love * 2842e9a92fSRobert Love * The lport, disc and rport blocks all have mutexes that are used to protect 2942e9a92fSRobert Love * those objects. The main motivation for these locks is to prevent from 3042e9a92fSRobert Love * having an lport reset just before we send a frame. In that scenario the 3142e9a92fSRobert Love * lport's FID would get set to zero and then we'd send a frame with an 3242e9a92fSRobert Love * invalid SID. We also need to ensure that states don't change unexpectedly 3342e9a92fSRobert Love * while processing another state. 3442e9a92fSRobert Love * 3542e9a92fSRobert Love * HEIRARCHY 3642e9a92fSRobert Love * 3742e9a92fSRobert Love * The following heirarchy defines the locking rules. A greater lock 3842e9a92fSRobert Love * may be held before acquiring a lesser lock, but a lesser lock should never 3942e9a92fSRobert Love * be held while attempting to acquire a greater lock. Here is the heirarchy- 4042e9a92fSRobert Love * 4142e9a92fSRobert Love * lport > disc, lport > rport, disc > rport 4242e9a92fSRobert Love * 4342e9a92fSRobert Love * CALLBACKS 4442e9a92fSRobert Love * 4542e9a92fSRobert Love * The callbacks cause complications with this scheme. There is a callback 4642e9a92fSRobert Love * from the rport (to either lport or disc) and a callback from disc 4742e9a92fSRobert Love * (to the lport). 4842e9a92fSRobert Love * 4942e9a92fSRobert Love * As rports exit the rport state machine a callback is made to the owner of 5042e9a92fSRobert Love * the rport to notify success or failure. Since the callback is likely to 5142e9a92fSRobert Love * cause the lport or disc to grab its lock we cannot hold the rport lock 5242e9a92fSRobert Love * while making the callback. To ensure that the rport is not free'd while 5342e9a92fSRobert Love * processing the callback the rport callbacks are serialized through a 5442e9a92fSRobert Love * single-threaded workqueue. An rport would never be free'd while in a 5542e9a92fSRobert Love * callback handler becuase no other rport work in this queue can be executed 5642e9a92fSRobert Love * at the same time. 5742e9a92fSRobert Love * 5842e9a92fSRobert Love * When discovery succeeds or fails a callback is made to the lport as 5942e9a92fSRobert Love * notification. Currently, succesful discovery causes the lport to take no 6042e9a92fSRobert Love * action. A failure will cause the lport to reset. There is likely a circular 6142e9a92fSRobert Love * locking problem with this implementation. 6242e9a92fSRobert Love */ 6342e9a92fSRobert Love 6442e9a92fSRobert Love /* 6542e9a92fSRobert Love * LPORT LOCKING 6642e9a92fSRobert Love * 6742e9a92fSRobert Love * The critical sections protected by the lport's mutex are quite broad and 6842e9a92fSRobert Love * may be improved upon in the future. The lport code and its locking doesn't 6942e9a92fSRobert Love * influence the I/O path, so excessive locking doesn't penalize I/O 7042e9a92fSRobert Love * performance. 7142e9a92fSRobert Love * 7242e9a92fSRobert Love * The strategy is to lock whenever processing a request or response. Note 7342e9a92fSRobert Love * that every _enter_* function corresponds to a state change. They generally 7442e9a92fSRobert Love * change the lports state and then send a request out on the wire. We lock 7542e9a92fSRobert Love * before calling any of these functions to protect that state change. This 7642e9a92fSRobert Love * means that the entry points into the lport block manage the locks while 7742e9a92fSRobert Love * the state machine can transition between states (i.e. _enter_* functions) 7842e9a92fSRobert Love * while always staying protected. 7942e9a92fSRobert Love * 8042e9a92fSRobert Love * When handling responses we also hold the lport mutex broadly. When the 8142e9a92fSRobert Love * lport receives the response frame it locks the mutex and then calls the 8242e9a92fSRobert Love * appropriate handler for the particuar response. Generally a response will 8342e9a92fSRobert Love * trigger a state change and so the lock must already be held. 8442e9a92fSRobert Love * 8542e9a92fSRobert Love * Retries also have to consider the locking. The retries occur from a work 8642e9a92fSRobert Love * context and the work function will lock the lport and then retry the state 8742e9a92fSRobert Love * (i.e. _enter_* function). 8842e9a92fSRobert Love */ 8942e9a92fSRobert Love 9042e9a92fSRobert Love #include <linux/timer.h> 9142e9a92fSRobert Love #include <asm/unaligned.h> 9242e9a92fSRobert Love 9342e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 9442e9a92fSRobert Love 9542e9a92fSRobert Love #include <scsi/libfc.h> 9642e9a92fSRobert Love #include <scsi/fc_encode.h> 97a51ab396SSteve Ma #include <linux/scatterlist.h> 9842e9a92fSRobert Love 998866a5d9SRobert Love #include "fc_libfc.h" 1008866a5d9SRobert Love 10142e9a92fSRobert Love /* Fabric IDs to use for point-to-point mode, chosen on whims. */ 10242e9a92fSRobert Love #define FC_LOCAL_PTP_FID_LO 0x010101 10342e9a92fSRobert Love #define FC_LOCAL_PTP_FID_HI 0x010102 10442e9a92fSRobert Love 10542e9a92fSRobert Love #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ 10642e9a92fSRobert Love 10742e9a92fSRobert Love static void fc_lport_error(struct fc_lport *, struct fc_frame *); 10842e9a92fSRobert Love 10942e9a92fSRobert Love static void fc_lport_enter_reset(struct fc_lport *); 11042e9a92fSRobert Love static void fc_lport_enter_flogi(struct fc_lport *); 11142e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *); 112c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); 11342e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *); 11442e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *); 11542e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *); 11642e9a92fSRobert Love 11742e9a92fSRobert Love static const char *fc_lport_state_names[] = { 118b1d9fd55SJoe Eykholt [LPORT_ST_DISABLED] = "disabled", 11942e9a92fSRobert Love [LPORT_ST_FLOGI] = "FLOGI", 12042e9a92fSRobert Love [LPORT_ST_DNS] = "dNS", 121c9c7bd7aSChris Leech [LPORT_ST_RNN_ID] = "RNN_ID", 1225baa17c3SChris Leech [LPORT_ST_RSNN_NN] = "RSNN_NN", 123c9866a54SChris Leech [LPORT_ST_RSPN_ID] = "RSPN_ID", 12442e9a92fSRobert Love [LPORT_ST_RFT_ID] = "RFT_ID", 12542e9a92fSRobert Love [LPORT_ST_SCR] = "SCR", 12642e9a92fSRobert Love [LPORT_ST_READY] = "Ready", 12742e9a92fSRobert Love [LPORT_ST_LOGO] = "LOGO", 12842e9a92fSRobert Love [LPORT_ST_RESET] = "reset", 12942e9a92fSRobert Love }; 13042e9a92fSRobert Love 131a51ab396SSteve Ma /** 132a51ab396SSteve Ma * struct fc_bsg_info - FC Passthrough managemet structure 133a51ab396SSteve Ma * @job: The passthrough job 134a51ab396SSteve Ma * @lport: The local port to pass through a command 135a51ab396SSteve Ma * @rsp_code: The expected response code 136a51ab396SSteve Ma * @sg: job->reply_payload.sg_list 137a51ab396SSteve Ma * @nents: job->reply_payload.sg_cnt 138a51ab396SSteve Ma * @offset: The offset into the response data 139a51ab396SSteve Ma */ 140a51ab396SSteve Ma struct fc_bsg_info { 141a51ab396SSteve Ma struct fc_bsg_job *job; 142a51ab396SSteve Ma struct fc_lport *lport; 143a51ab396SSteve Ma u16 rsp_code; 144a51ab396SSteve Ma struct scatterlist *sg; 145a51ab396SSteve Ma u32 nents; 146a51ab396SSteve Ma size_t offset; 147a51ab396SSteve Ma }; 148a51ab396SSteve Ma 1493a3b42bfSRobert Love /** 1503a3b42bfSRobert Love * fc_frame_drop() - Dummy frame handler 1513a3b42bfSRobert Love * @lport: The local port the frame was received on 1523a3b42bfSRobert Love * @fp: The received frame 1533a3b42bfSRobert Love */ 15442e9a92fSRobert Love static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) 15542e9a92fSRobert Love { 15642e9a92fSRobert Love fc_frame_free(fp); 15742e9a92fSRobert Love return 0; 15842e9a92fSRobert Love } 15942e9a92fSRobert Love 16042e9a92fSRobert Love /** 16134f42a07SRobert Love * fc_lport_rport_callback() - Event handler for rport events 16242e9a92fSRobert Love * @lport: The lport which is receiving the event 1639fb9d328SJoe Eykholt * @rdata: private remote port data 16442e9a92fSRobert Love * @event: The event that occured 16542e9a92fSRobert Love * 16642e9a92fSRobert Love * Locking Note: The rport lock should not be held when calling 16742e9a92fSRobert Love * this function. 16842e9a92fSRobert Love */ 16942e9a92fSRobert Love static void fc_lport_rport_callback(struct fc_lport *lport, 1709fb9d328SJoe Eykholt struct fc_rport_priv *rdata, 17142e9a92fSRobert Love enum fc_rport_event event) 17242e9a92fSRobert Love { 1737414705eSRobert Love FC_LPORT_DBG(lport, "Received a %d event for port (%6x)\n", event, 174f211fa51SJoe Eykholt rdata->ids.port_id); 17542e9a92fSRobert Love 176b5cbf083SJoe Eykholt mutex_lock(&lport->lp_mutex); 17742e9a92fSRobert Love switch (event) { 1784c0f62b5SJoe Eykholt case RPORT_EV_READY: 17942e9a92fSRobert Love if (lport->state == LPORT_ST_DNS) { 1803a3b42bfSRobert Love lport->dns_rdata = rdata; 181c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); 18242e9a92fSRobert Love } else { 1834c0f62b5SJoe Eykholt FC_LPORT_DBG(lport, "Received an READY event " 1847414705eSRobert Love "on port (%6x) for the directory " 18542e9a92fSRobert Love "server, but the lport is not " 18642e9a92fSRobert Love "in the DNS state, it's in the " 187f211fa51SJoe Eykholt "%d state", rdata->ids.port_id, 18842e9a92fSRobert Love lport->state); 1899fb9d328SJoe Eykholt lport->tt.rport_logoff(rdata); 19042e9a92fSRobert Love } 19142e9a92fSRobert Love break; 19242e9a92fSRobert Love case RPORT_EV_LOGO: 19342e9a92fSRobert Love case RPORT_EV_FAILED: 19442e9a92fSRobert Love case RPORT_EV_STOP: 1953a3b42bfSRobert Love lport->dns_rdata = NULL; 19642e9a92fSRobert Love break; 19742e9a92fSRobert Love case RPORT_EV_NONE: 19842e9a92fSRobert Love break; 19942e9a92fSRobert Love } 200b5cbf083SJoe Eykholt mutex_unlock(&lport->lp_mutex); 20142e9a92fSRobert Love } 20242e9a92fSRobert Love 20342e9a92fSRobert Love /** 20434f42a07SRobert Love * fc_lport_state() - Return a string which represents the lport's state 20542e9a92fSRobert Love * @lport: The lport whose state is to converted to a string 20642e9a92fSRobert Love */ 20742e9a92fSRobert Love static const char *fc_lport_state(struct fc_lport *lport) 20842e9a92fSRobert Love { 20942e9a92fSRobert Love const char *cp; 21042e9a92fSRobert Love 21142e9a92fSRobert Love cp = fc_lport_state_names[lport->state]; 21242e9a92fSRobert Love if (!cp) 21342e9a92fSRobert Love cp = "unknown"; 21442e9a92fSRobert Love return cp; 21542e9a92fSRobert Love } 21642e9a92fSRobert Love 21742e9a92fSRobert Love /** 21834f42a07SRobert Love * fc_lport_ptp_setup() - Create an rport for point-to-point mode 21942e9a92fSRobert Love * @lport: The lport to attach the ptp rport to 2203a3b42bfSRobert Love * @remote_fid: The FID of the ptp rport 22142e9a92fSRobert Love * @remote_wwpn: The WWPN of the ptp rport 22242e9a92fSRobert Love * @remote_wwnn: The WWNN of the ptp rport 22342e9a92fSRobert Love */ 22442e9a92fSRobert Love static void fc_lport_ptp_setup(struct fc_lport *lport, 22542e9a92fSRobert Love u32 remote_fid, u64 remote_wwpn, 22642e9a92fSRobert Love u64 remote_wwnn) 22742e9a92fSRobert Love { 22848f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 2293a3b42bfSRobert Love if (lport->ptp_rdata) 2303a3b42bfSRobert Love lport->tt.rport_logoff(lport->ptp_rdata); 2313a3b42bfSRobert Love lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid); 2323a3b42bfSRobert Love lport->ptp_rdata->ids.port_name = remote_wwpn; 2333a3b42bfSRobert Love lport->ptp_rdata->ids.node_name = remote_wwnn; 23448f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 23542e9a92fSRobert Love 2363a3b42bfSRobert Love lport->tt.rport_login(lport->ptp_rdata); 23742e9a92fSRobert Love 23842e9a92fSRobert Love fc_lport_enter_ready(lport); 23942e9a92fSRobert Love } 24042e9a92fSRobert Love 2413a3b42bfSRobert Love /** 2423a3b42bfSRobert Love * fc_get_host_port_type() - Return the port type of the given Scsi_Host 2433a3b42bfSRobert Love * @shost: The SCSI host whose port type is to be determined 2443a3b42bfSRobert Love */ 24542e9a92fSRobert Love void fc_get_host_port_type(struct Scsi_Host *shost) 24642e9a92fSRobert Love { 24742e9a92fSRobert Love /* TODO - currently just NPORT */ 24842e9a92fSRobert Love fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 24942e9a92fSRobert Love } 25042e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_type); 25142e9a92fSRobert Love 2523a3b42bfSRobert Love /** 2533a3b42bfSRobert Love * fc_get_host_port_state() - Return the port state of the given Scsi_Host 2543a3b42bfSRobert Love * @shost: The SCSI host whose port state is to be determined 2553a3b42bfSRobert Love */ 25642e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost) 25742e9a92fSRobert Love { 2583a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 25942e9a92fSRobert Love 2603a3b42bfSRobert Love mutex_lock(&lport->lp_mutex); 2613a3b42bfSRobert Love if (!lport->link_up) 2628faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 26342e9a92fSRobert Love else 2643a3b42bfSRobert Love switch (lport->state) { 2658faecddbSChris Leech case LPORT_ST_READY: 2668faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 2678faecddbSChris Leech break; 2688faecddbSChris Leech default: 26942e9a92fSRobert Love fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 27042e9a92fSRobert Love } 2713a3b42bfSRobert Love mutex_unlock(&lport->lp_mutex); 2728faecddbSChris Leech } 27342e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_state); 27442e9a92fSRobert Love 2753a3b42bfSRobert Love /** 2763a3b42bfSRobert Love * fc_get_host_speed() - Return the speed of the given Scsi_Host 2773a3b42bfSRobert Love * @shost: The SCSI host whose port speed is to be determined 2783a3b42bfSRobert Love */ 27942e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost) 28042e9a92fSRobert Love { 28142e9a92fSRobert Love struct fc_lport *lport = shost_priv(shost); 28242e9a92fSRobert Love 28342e9a92fSRobert Love fc_host_speed(shost) = lport->link_speed; 28442e9a92fSRobert Love } 28542e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_speed); 28642e9a92fSRobert Love 2873a3b42bfSRobert Love /** 2883a3b42bfSRobert Love * fc_get_host_stats() - Return the Scsi_Host's statistics 2893a3b42bfSRobert Love * @shost: The SCSI host whose statistics are to be returned 2903a3b42bfSRobert Love */ 29142e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) 29242e9a92fSRobert Love { 29342e9a92fSRobert Love struct fc_host_statistics *fcoe_stats; 2943a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 29542e9a92fSRobert Love struct timespec v0, v1; 296582b45bcSRobert Love unsigned int cpu; 29742e9a92fSRobert Love 2983a3b42bfSRobert Love fcoe_stats = &lport->host_stats; 29942e9a92fSRobert Love memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); 30042e9a92fSRobert Love 30142e9a92fSRobert Love jiffies_to_timespec(jiffies, &v0); 3023a3b42bfSRobert Love jiffies_to_timespec(lport->boot_time, &v1); 30342e9a92fSRobert Love fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); 30442e9a92fSRobert Love 305582b45bcSRobert Love for_each_possible_cpu(cpu) { 306582b45bcSRobert Love struct fcoe_dev_stats *stats; 307582b45bcSRobert Love 3083a3b42bfSRobert Love stats = per_cpu_ptr(lport->dev_stats, cpu); 309582b45bcSRobert Love 31042e9a92fSRobert Love fcoe_stats->tx_frames += stats->TxFrames; 31142e9a92fSRobert Love fcoe_stats->tx_words += stats->TxWords; 31242e9a92fSRobert Love fcoe_stats->rx_frames += stats->RxFrames; 31342e9a92fSRobert Love fcoe_stats->rx_words += stats->RxWords; 31442e9a92fSRobert Love fcoe_stats->error_frames += stats->ErrorFrames; 31542e9a92fSRobert Love fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; 31642e9a92fSRobert Love fcoe_stats->fcp_input_requests += stats->InputRequests; 31742e9a92fSRobert Love fcoe_stats->fcp_output_requests += stats->OutputRequests; 31842e9a92fSRobert Love fcoe_stats->fcp_control_requests += stats->ControlRequests; 31942e9a92fSRobert Love fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; 32042e9a92fSRobert Love fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; 32142e9a92fSRobert Love fcoe_stats->link_failure_count += stats->LinkFailureCount; 32242e9a92fSRobert Love } 32342e9a92fSRobert Love fcoe_stats->lip_count = -1; 32442e9a92fSRobert Love fcoe_stats->nos_count = -1; 32542e9a92fSRobert Love fcoe_stats->loss_of_sync_count = -1; 32642e9a92fSRobert Love fcoe_stats->loss_of_signal_count = -1; 32742e9a92fSRobert Love fcoe_stats->prim_seq_protocol_err_count = -1; 32842e9a92fSRobert Love fcoe_stats->dumped_frames = -1; 32942e9a92fSRobert Love return fcoe_stats; 33042e9a92fSRobert Love } 33142e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_stats); 33242e9a92fSRobert Love 3333a3b42bfSRobert Love /** 3343a3b42bfSRobert Love * fc_lport_flogi_fill() - Fill in FLOGI command for request 3353a3b42bfSRobert Love * @lport: The local port the FLOGI is for 3363a3b42bfSRobert Love * @flogi: The FLOGI command 3373a3b42bfSRobert Love * @op: The opcode 33842e9a92fSRobert Love */ 3393a3b42bfSRobert Love static void fc_lport_flogi_fill(struct fc_lport *lport, 3403a3b42bfSRobert Love struct fc_els_flogi *flogi, 34142e9a92fSRobert Love unsigned int op) 34242e9a92fSRobert Love { 34342e9a92fSRobert Love struct fc_els_csp *sp; 34442e9a92fSRobert Love struct fc_els_cssp *cp; 34542e9a92fSRobert Love 34642e9a92fSRobert Love memset(flogi, 0, sizeof(*flogi)); 34742e9a92fSRobert Love flogi->fl_cmd = (u8) op; 34842e9a92fSRobert Love put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); 34942e9a92fSRobert Love put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); 35042e9a92fSRobert Love sp = &flogi->fl_csp; 35142e9a92fSRobert Love sp->sp_hi_ver = 0x20; 35242e9a92fSRobert Love sp->sp_lo_ver = 0x20; 35342e9a92fSRobert Love sp->sp_bb_cred = htons(10); /* this gets set by gateway */ 35442e9a92fSRobert Love sp->sp_bb_data = htons((u16) lport->mfs); 35542e9a92fSRobert Love cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ 35642e9a92fSRobert Love cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); 35742e9a92fSRobert Love if (op != ELS_FLOGI) { 35842e9a92fSRobert Love sp->sp_features = htons(FC_SP_FT_CIRO); 35942e9a92fSRobert Love sp->sp_tot_seq = htons(255); /* seq. we accept */ 36042e9a92fSRobert Love sp->sp_rel_off = htons(0x1f); 36142e9a92fSRobert Love sp->sp_e_d_tov = htonl(lport->e_d_tov); 36242e9a92fSRobert Love 36342e9a92fSRobert Love cp->cp_rdfs = htons((u16) lport->mfs); 36442e9a92fSRobert Love cp->cp_con_seq = htons(255); 36542e9a92fSRobert Love cp->cp_open_seq = 1; 36642e9a92fSRobert Love } 36742e9a92fSRobert Love } 36842e9a92fSRobert Love 3693a3b42bfSRobert Love /** 3703a3b42bfSRobert Love * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port 3713a3b42bfSRobert Love * @lport: The local port to add a new FC-4 type to 3723a3b42bfSRobert Love * @type: The new FC-4 type 37342e9a92fSRobert Love */ 37442e9a92fSRobert Love static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) 37542e9a92fSRobert Love { 37642e9a92fSRobert Love __be32 *mp; 37742e9a92fSRobert Love 37842e9a92fSRobert Love mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; 37942e9a92fSRobert Love *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); 38042e9a92fSRobert Love } 38142e9a92fSRobert Love 38242e9a92fSRobert Love /** 38334f42a07SRobert Love * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. 3843a3b42bfSRobert Love * @sp: The sequence in the RLIR exchange 3853a3b42bfSRobert Love * @fp: The RLIR request frame 38642e9a92fSRobert Love * @lport: Fibre Channel local port recieving the RLIR 38742e9a92fSRobert Love * 3881b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 38942e9a92fSRobert Love * this function. 39042e9a92fSRobert Love */ 39142e9a92fSRobert Love static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, 39242e9a92fSRobert Love struct fc_lport *lport) 39342e9a92fSRobert Love { 3947414705eSRobert Love FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", 39542e9a92fSRobert Love fc_lport_state(lport)); 39642e9a92fSRobert Love 39742e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 39842e9a92fSRobert Love fc_frame_free(fp); 39942e9a92fSRobert Love } 40042e9a92fSRobert Love 40142e9a92fSRobert Love /** 40234f42a07SRobert Love * fc_lport_recv_echo_req() - Handle received ECHO request 4033a3b42bfSRobert Love * @sp: The sequence in the ECHO exchange 40442e9a92fSRobert Love * @fp: ECHO request frame 4053a3b42bfSRobert Love * @lport: The local port recieving the ECHO 40642e9a92fSRobert Love * 4071b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 40842e9a92fSRobert Love * this function. 40942e9a92fSRobert Love */ 41042e9a92fSRobert Love static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp, 41142e9a92fSRobert Love struct fc_lport *lport) 41242e9a92fSRobert Love { 41342e9a92fSRobert Love struct fc_frame *fp; 41442e9a92fSRobert Love struct fc_exch *ep = fc_seq_exch(sp); 41542e9a92fSRobert Love unsigned int len; 41642e9a92fSRobert Love void *pp; 41742e9a92fSRobert Love void *dp; 41842e9a92fSRobert Love u32 f_ctl; 41942e9a92fSRobert Love 4201b69bc06SJoe Eykholt FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", 42142e9a92fSRobert Love fc_lport_state(lport)); 42242e9a92fSRobert Love 42342e9a92fSRobert Love len = fr_len(in_fp) - sizeof(struct fc_frame_header); 42442e9a92fSRobert Love pp = fc_frame_payload_get(in_fp, len); 42542e9a92fSRobert Love 42642e9a92fSRobert Love if (len < sizeof(__be32)) 42742e9a92fSRobert Love len = sizeof(__be32); 42842e9a92fSRobert Love 42942e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 43042e9a92fSRobert Love if (fp) { 43142e9a92fSRobert Love dp = fc_frame_payload_get(fp, len); 43242e9a92fSRobert Love memcpy(dp, pp, len); 4331b69bc06SJoe Eykholt *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); 43442e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 43542e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 43642e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 43742e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 43842e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 43942e9a92fSRobert Love } 44042e9a92fSRobert Love fc_frame_free(in_fp); 44142e9a92fSRobert Love } 44242e9a92fSRobert Love 44342e9a92fSRobert Love /** 4441b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 4451b69bc06SJoe Eykholt * @sp: The sequence in the RNID exchange 4461b69bc06SJoe Eykholt * @fp: The RNID request frame 4471b69bc06SJoe Eykholt * @lport: The local port recieving the RNID 44842e9a92fSRobert Love * 4491b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 45042e9a92fSRobert Love * this function. 45142e9a92fSRobert Love */ 45242e9a92fSRobert Love static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, 45342e9a92fSRobert Love struct fc_lport *lport) 45442e9a92fSRobert Love { 45542e9a92fSRobert Love struct fc_frame *fp; 45642e9a92fSRobert Love struct fc_exch *ep = fc_seq_exch(sp); 45742e9a92fSRobert Love struct fc_els_rnid *req; 45842e9a92fSRobert Love struct { 45942e9a92fSRobert Love struct fc_els_rnid_resp rnid; 46042e9a92fSRobert Love struct fc_els_rnid_cid cid; 46142e9a92fSRobert Love struct fc_els_rnid_gen gen; 46242e9a92fSRobert Love } *rp; 46342e9a92fSRobert Love struct fc_seq_els_data rjt_data; 46442e9a92fSRobert Love u8 fmt; 46542e9a92fSRobert Love size_t len; 46642e9a92fSRobert Love u32 f_ctl; 46742e9a92fSRobert Love 4687414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 46942e9a92fSRobert Love fc_lport_state(lport)); 47042e9a92fSRobert Love 47142e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 47242e9a92fSRobert Love if (!req) { 47342e9a92fSRobert Love rjt_data.fp = NULL; 47442e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 47542e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 47642e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); 47742e9a92fSRobert Love } else { 47842e9a92fSRobert Love fmt = req->rnid_fmt; 47942e9a92fSRobert Love len = sizeof(*rp); 48042e9a92fSRobert Love if (fmt != ELS_RNIDF_GEN || 48142e9a92fSRobert Love ntohl(lport->rnid_gen.rnid_atype) == 0) { 48242e9a92fSRobert Love fmt = ELS_RNIDF_NONE; /* nothing to provide */ 48342e9a92fSRobert Love len -= sizeof(rp->gen); 48442e9a92fSRobert Love } 48542e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 48642e9a92fSRobert Love if (fp) { 48742e9a92fSRobert Love rp = fc_frame_payload_get(fp, len); 48842e9a92fSRobert Love memset(rp, 0, len); 48942e9a92fSRobert Love rp->rnid.rnid_cmd = ELS_LS_ACC; 49042e9a92fSRobert Love rp->rnid.rnid_fmt = fmt; 49142e9a92fSRobert Love rp->rnid.rnid_cid_len = sizeof(rp->cid); 49242e9a92fSRobert Love rp->cid.rnid_wwpn = htonll(lport->wwpn); 49342e9a92fSRobert Love rp->cid.rnid_wwnn = htonll(lport->wwnn); 49442e9a92fSRobert Love if (fmt == ELS_RNIDF_GEN) { 49542e9a92fSRobert Love rp->rnid.rnid_sid_len = sizeof(rp->gen); 49642e9a92fSRobert Love memcpy(&rp->gen, &lport->rnid_gen, 49742e9a92fSRobert Love sizeof(rp->gen)); 49842e9a92fSRobert Love } 49942e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 50042e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; 50142e9a92fSRobert Love f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; 50242e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 50342e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 50442e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 50542e9a92fSRobert Love } 50642e9a92fSRobert Love } 50742e9a92fSRobert Love fc_frame_free(in_fp); 50842e9a92fSRobert Love } 50942e9a92fSRobert Love 51042e9a92fSRobert Love /** 51134f42a07SRobert Love * fc_lport_recv_logo_req() - Handle received fabric LOGO request 5123a3b42bfSRobert Love * @sp: The sequence in the LOGO exchange 5133a3b42bfSRobert Love * @fp: The LOGO request frame 5143a3b42bfSRobert Love * @lport: The local port recieving the LOGO 51542e9a92fSRobert Love * 51642e9a92fSRobert Love * Locking Note: The lport lock is exected to be held before calling 51742e9a92fSRobert Love * this function. 51842e9a92fSRobert Love */ 51942e9a92fSRobert Love static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, 52042e9a92fSRobert Love struct fc_lport *lport) 52142e9a92fSRobert Love { 52242e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 52342e9a92fSRobert Love fc_lport_enter_reset(lport); 52442e9a92fSRobert Love fc_frame_free(fp); 52542e9a92fSRobert Love } 52642e9a92fSRobert Love 52742e9a92fSRobert Love /** 52834f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 5293a3b42bfSRobert Love * @lport: The local port that should log into the fabric 53042e9a92fSRobert Love * 53142e9a92fSRobert Love * Locking Note: This function should not be called 53242e9a92fSRobert Love * with the lport lock held. 53342e9a92fSRobert Love */ 53442e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 53542e9a92fSRobert Love { 53642e9a92fSRobert Love int rc = -1; 53742e9a92fSRobert Love 53842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 539b1d9fd55SJoe Eykholt if (lport->state == LPORT_ST_DISABLED) { 54042e9a92fSRobert Love fc_lport_enter_reset(lport); 54142e9a92fSRobert Love rc = 0; 54242e9a92fSRobert Love } 54342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 54442e9a92fSRobert Love 54542e9a92fSRobert Love return rc; 54642e9a92fSRobert Love } 54742e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 54842e9a92fSRobert Love 54942e9a92fSRobert Love /** 5508faecddbSChris Leech * __fc_linkup() - Handler for transport linkup events 5518faecddbSChris Leech * @lport: The lport whose link is up 5528faecddbSChris Leech * 5538faecddbSChris Leech * Locking: must be called with the lp_mutex held 5548faecddbSChris Leech */ 5558faecddbSChris Leech void __fc_linkup(struct fc_lport *lport) 5568faecddbSChris Leech { 5578faecddbSChris Leech if (!lport->link_up) { 5588faecddbSChris Leech lport->link_up = 1; 5598faecddbSChris Leech 5608faecddbSChris Leech if (lport->state == LPORT_ST_RESET) 5618faecddbSChris Leech fc_lport_enter_flogi(lport); 5628faecddbSChris Leech } 5638faecddbSChris Leech } 5648faecddbSChris Leech 5658faecddbSChris Leech /** 56634f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 5673a3b42bfSRobert Love * @lport: The local port whose link is up 56842e9a92fSRobert Love */ 56942e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 57042e9a92fSRobert Love { 5717414705eSRobert Love printk(KERN_INFO "libfc: Link up on port (%6x)\n", 57242e9a92fSRobert Love fc_host_port_id(lport->host)); 57342e9a92fSRobert Love 57442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5758faecddbSChris Leech __fc_linkup(lport); 57642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 57742e9a92fSRobert Love } 57842e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 57942e9a92fSRobert Love 58042e9a92fSRobert Love /** 5818faecddbSChris Leech * __fc_linkdown() - Handler for transport linkdown events 5828faecddbSChris Leech * @lport: The lport whose link is down 5838faecddbSChris Leech * 5848faecddbSChris Leech * Locking: must be called with the lp_mutex held 5858faecddbSChris Leech */ 5868faecddbSChris Leech void __fc_linkdown(struct fc_lport *lport) 5878faecddbSChris Leech { 5888faecddbSChris Leech if (lport->link_up) { 5898faecddbSChris Leech lport->link_up = 0; 5908faecddbSChris Leech fc_lport_enter_reset(lport); 5918faecddbSChris Leech lport->tt.fcp_cleanup(lport); 5928faecddbSChris Leech } 5938faecddbSChris Leech } 5948faecddbSChris Leech 5958faecddbSChris Leech /** 59634f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 5973a3b42bfSRobert Love * @lport: The local port whose link is down 59842e9a92fSRobert Love */ 59942e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 60042e9a92fSRobert Love { 6017414705eSRobert Love printk(KERN_INFO "libfc: Link down on port (%6x)\n", 60242e9a92fSRobert Love fc_host_port_id(lport->host)); 60342e9a92fSRobert Love 6048faecddbSChris Leech mutex_lock(&lport->lp_mutex); 6058faecddbSChris Leech __fc_linkdown(lport); 60642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 60742e9a92fSRobert Love } 60842e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 60942e9a92fSRobert Love 61042e9a92fSRobert Love /** 61134f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 6123a3b42bfSRobert Love * @lport: The local port to logoff the fabric 61342e9a92fSRobert Love * 61442e9a92fSRobert Love * Return value: 61542e9a92fSRobert Love * 0 for success, -1 for failure 61634f42a07SRobert Love */ 61742e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 61842e9a92fSRobert Love { 61942e9a92fSRobert Love lport->tt.disc_stop_final(lport); 62042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 6213a3b42bfSRobert Love if (lport->dns_rdata) 6223a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 623a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 624a0fd2e49SAbhijeet Joglekar lport->tt.rport_flush_queue(); 625a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 62642e9a92fSRobert Love fc_lport_enter_logo(lport); 62742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 628f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 62942e9a92fSRobert Love return 0; 63042e9a92fSRobert Love } 63142e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 63242e9a92fSRobert Love 63342e9a92fSRobert Love /** 6343a3b42bfSRobert Love * fc_lport_destroy() - Unregister a fc_lport 6353a3b42bfSRobert Love * @lport: The local port to unregister 63642e9a92fSRobert Love * 63742e9a92fSRobert Love * Note: 63842e9a92fSRobert Love * exit routine for fc_lport instance 63942e9a92fSRobert Love * clean-up all the allocated memory 64042e9a92fSRobert Love * and free up other system resources. 64142e9a92fSRobert Love * 64234f42a07SRobert Love */ 64342e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 64442e9a92fSRobert Love { 645bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 646b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 647bbf15669SAbhijeet Joglekar lport->link_up = 0; 64842e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 649bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 650bbf15669SAbhijeet Joglekar 65142e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 652e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 6531f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 65442e9a92fSRobert Love return 0; 65542e9a92fSRobert Love } 65642e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 65742e9a92fSRobert Love 65842e9a92fSRobert Love /** 6593a3b42bfSRobert Love * fc_set_mfs() - Set the maximum frame size for a local port 6603a3b42bfSRobert Love * @lport: The local port to set the MFS for 6613a3b42bfSRobert Love * @mfs: The new MFS 66234f42a07SRobert Love */ 66342e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 66442e9a92fSRobert Love { 66542e9a92fSRobert Love unsigned int old_mfs; 66642e9a92fSRobert Love int rc = -EINVAL; 66742e9a92fSRobert Love 66842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 66942e9a92fSRobert Love 67042e9a92fSRobert Love old_mfs = lport->mfs; 67142e9a92fSRobert Love 67242e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 67342e9a92fSRobert Love mfs &= ~3; 67442e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 67542e9a92fSRobert Love mfs = FC_MAX_FRAME; 67642e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 67742e9a92fSRobert Love lport->mfs = mfs; 67842e9a92fSRobert Love rc = 0; 67942e9a92fSRobert Love } 68042e9a92fSRobert Love 68142e9a92fSRobert Love if (!rc && mfs < old_mfs) 68242e9a92fSRobert Love fc_lport_enter_reset(lport); 68342e9a92fSRobert Love 68442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 68542e9a92fSRobert Love 68642e9a92fSRobert Love return rc; 68742e9a92fSRobert Love } 68842e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 68942e9a92fSRobert Love 69042e9a92fSRobert Love /** 69134f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 6923a3b42bfSRobert Love * @lport: The local port receiving the event 69342e9a92fSRobert Love * @event: The discovery event 69442e9a92fSRobert Love */ 69542e9a92fSRobert Love void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) 69642e9a92fSRobert Love { 69742e9a92fSRobert Love switch (event) { 69842e9a92fSRobert Love case DISC_EV_SUCCESS: 6997414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 70042e9a92fSRobert Love break; 70142e9a92fSRobert Love case DISC_EV_FAILED: 7027414705eSRobert Love printk(KERN_ERR "libfc: Discovery failed for port (%6x)\n", 70342e9a92fSRobert Love fc_host_port_id(lport->host)); 70442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 70542e9a92fSRobert Love fc_lport_enter_reset(lport); 70642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 70742e9a92fSRobert Love break; 70842e9a92fSRobert Love case DISC_EV_NONE: 70942e9a92fSRobert Love WARN_ON(1); 71042e9a92fSRobert Love break; 71142e9a92fSRobert Love } 71242e9a92fSRobert Love } 71342e9a92fSRobert Love 71442e9a92fSRobert Love /** 71534f42a07SRobert Love * fc_rport_enter_ready() - Enter the ready state and start discovery 7163a3b42bfSRobert Love * @lport: The local port that is ready 71742e9a92fSRobert Love * 71842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 71942e9a92fSRobert Love * this routine. 72042e9a92fSRobert Love */ 72142e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 72242e9a92fSRobert Love { 7237414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 7247414705eSRobert Love fc_lport_state(lport)); 72542e9a92fSRobert Love 72642e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 7278faecddbSChris Leech if (lport->vport) 7288faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); 7298faecddbSChris Leech fc_vports_linkchange(lport); 73042e9a92fSRobert Love 7313a3b42bfSRobert Love if (!lport->ptp_rdata) 73242e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 73342e9a92fSRobert Love } 73442e9a92fSRobert Love 73542e9a92fSRobert Love /** 736093bb6a2SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID 737093bb6a2SJoe Eykholt * @lport: The local port which will have its Port ID set. 738093bb6a2SJoe Eykholt * @port_id: The new port ID. 739093bb6a2SJoe Eykholt * @fp: The frame containing the incoming request, or NULL. 740093bb6a2SJoe Eykholt * 741093bb6a2SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 742093bb6a2SJoe Eykholt * this function. 743093bb6a2SJoe Eykholt */ 744093bb6a2SJoe Eykholt static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, 745093bb6a2SJoe Eykholt struct fc_frame *fp) 746093bb6a2SJoe Eykholt { 747093bb6a2SJoe Eykholt if (port_id) 748093bb6a2SJoe Eykholt printk(KERN_INFO "host%d: Assigned Port ID %6x\n", 749093bb6a2SJoe Eykholt lport->host->host_no, port_id); 750093bb6a2SJoe Eykholt 751093bb6a2SJoe Eykholt fc_host_port_id(lport->host) = port_id; 752093bb6a2SJoe Eykholt if (lport->tt.lport_set_port_id) 753093bb6a2SJoe Eykholt lport->tt.lport_set_port_id(lport, port_id, fp); 754093bb6a2SJoe Eykholt } 755093bb6a2SJoe Eykholt 756093bb6a2SJoe Eykholt /** 75734f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 75842e9a92fSRobert Love * @sp_in: The sequence the FLOGI is on 7593a3b42bfSRobert Love * @rx_fp: The FLOGI frame 7603a3b42bfSRobert Love * @lport: The local port that recieved the request 76142e9a92fSRobert Love * 76242e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 76342e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 76442e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 76542e9a92fSRobert Love * 7661b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 76742e9a92fSRobert Love * this function. 76842e9a92fSRobert Love */ 76942e9a92fSRobert Love static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, 77042e9a92fSRobert Love struct fc_frame *rx_fp, 77142e9a92fSRobert Love struct fc_lport *lport) 77242e9a92fSRobert Love { 77342e9a92fSRobert Love struct fc_frame *fp; 77442e9a92fSRobert Love struct fc_frame_header *fh; 77542e9a92fSRobert Love struct fc_seq *sp; 77642e9a92fSRobert Love struct fc_exch *ep; 77742e9a92fSRobert Love struct fc_els_flogi *flp; 77842e9a92fSRobert Love struct fc_els_flogi *new_flp; 77942e9a92fSRobert Love u64 remote_wwpn; 78042e9a92fSRobert Love u32 remote_fid; 78142e9a92fSRobert Love u32 local_fid; 78242e9a92fSRobert Love u32 f_ctl; 78342e9a92fSRobert Love 7847414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 78542e9a92fSRobert Love fc_lport_state(lport)); 78642e9a92fSRobert Love 78742e9a92fSRobert Love fh = fc_frame_header_get(rx_fp); 78842e9a92fSRobert Love remote_fid = ntoh24(fh->fh_s_id); 78942e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 79042e9a92fSRobert Love if (!flp) 79142e9a92fSRobert Love goto out; 79242e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 79342e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 7947414705eSRobert Love printk(KERN_WARNING "libfc: Received FLOGI from port " 7957414705eSRobert Love "with same WWPN %llx\n", remote_wwpn); 79642e9a92fSRobert Love goto out; 79742e9a92fSRobert Love } 7987414705eSRobert Love FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn); 79942e9a92fSRobert Love 80042e9a92fSRobert Love /* 80142e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 80242e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 80342e9a92fSRobert Love * But if so, both of us could end up with the same FID. 80442e9a92fSRobert Love */ 80542e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 80642e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 80742e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 80842e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 80942e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 81042e9a92fSRobert Love } else if (!remote_fid) { 81142e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 81242e9a92fSRobert Love } 81342e9a92fSRobert Love 814093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, local_fid, rx_fp); 81542e9a92fSRobert Love 81642e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 81742e9a92fSRobert Love if (fp) { 81842e9a92fSRobert Love sp = lport->tt.seq_start_next(fr_seq(rx_fp)); 81942e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 82042e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 82142e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 82242e9a92fSRobert Love 82342e9a92fSRobert Love /* 82442e9a92fSRobert Love * Send the response. If this fails, the originator should 82542e9a92fSRobert Love * repeat the sequence. 82642e9a92fSRobert Love */ 82742e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 82842e9a92fSRobert Love ep = fc_seq_exch(sp); 82942e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 83042e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 83142e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 83242e9a92fSRobert Love 83342e9a92fSRobert Love } else { 83442e9a92fSRobert Love fc_lport_error(lport, fp); 83542e9a92fSRobert Love } 83642e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 83742e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 83842e9a92fSRobert Love 83942e9a92fSRobert Love out: 84042e9a92fSRobert Love sp = fr_seq(rx_fp); 84142e9a92fSRobert Love fc_frame_free(rx_fp); 84242e9a92fSRobert Love } 84342e9a92fSRobert Love 84442e9a92fSRobert Love /** 84534f42a07SRobert Love * fc_lport_recv_req() - The generic lport request handler 8463a3b42bfSRobert Love * @lport: The local port that received the request 84742e9a92fSRobert Love * @sp: The sequence the request is on 8483a3b42bfSRobert Love * @fp: The request frame 84942e9a92fSRobert Love * 85042e9a92fSRobert Love * This function will see if the lport handles the request or 85142e9a92fSRobert Love * if an rport should handle the request. 85242e9a92fSRobert Love * 85342e9a92fSRobert Love * Locking Note: This function should not be called with the lport 85442e9a92fSRobert Love * lock held becuase it will grab the lock. 85542e9a92fSRobert Love */ 85642e9a92fSRobert Love static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, 85742e9a92fSRobert Love struct fc_frame *fp) 85842e9a92fSRobert Love { 85942e9a92fSRobert Love struct fc_frame_header *fh = fc_frame_header_get(fp); 86042e9a92fSRobert Love void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); 86142e9a92fSRobert Love 86242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 86342e9a92fSRobert Love 86442e9a92fSRobert Love /* 86542e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 86642e9a92fSRobert Love * RSCN here. These don't require a session. 86742e9a92fSRobert Love * Even if we had a session, it might not be ready. 86842e9a92fSRobert Love */ 869e9ba8b42SJoe Eykholt if (!lport->link_up) 870e9ba8b42SJoe Eykholt fc_frame_free(fp); 871e9ba8b42SJoe Eykholt else if (fh->fh_type == FC_TYPE_ELS && 872e9ba8b42SJoe Eykholt fh->fh_r_ctl == FC_RCTL_ELS_REQ) { 87342e9a92fSRobert Love /* 87442e9a92fSRobert Love * Check opcode. 87542e9a92fSRobert Love */ 876131203a1SJoe Eykholt recv = lport->tt.rport_recv_req; 87742e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 87842e9a92fSRobert Love case ELS_FLOGI: 87942e9a92fSRobert Love recv = fc_lport_recv_flogi_req; 88042e9a92fSRobert Love break; 88142e9a92fSRobert Love case ELS_LOGO: 88242e9a92fSRobert Love fh = fc_frame_header_get(fp); 88342e9a92fSRobert Love if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) 88442e9a92fSRobert Love recv = fc_lport_recv_logo_req; 88542e9a92fSRobert Love break; 88642e9a92fSRobert Love case ELS_RSCN: 88742e9a92fSRobert Love recv = lport->tt.disc_recv_req; 88842e9a92fSRobert Love break; 88942e9a92fSRobert Love case ELS_ECHO: 89042e9a92fSRobert Love recv = fc_lport_recv_echo_req; 89142e9a92fSRobert Love break; 89242e9a92fSRobert Love case ELS_RLIR: 89342e9a92fSRobert Love recv = fc_lport_recv_rlir_req; 89442e9a92fSRobert Love break; 89542e9a92fSRobert Love case ELS_RNID: 89642e9a92fSRobert Love recv = fc_lport_recv_rnid_req; 89742e9a92fSRobert Love break; 89842e9a92fSRobert Love } 89942e9a92fSRobert Love 90042e9a92fSRobert Love recv(sp, fp, lport); 90142e9a92fSRobert Love } else { 9027414705eSRobert Love FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", 9037414705eSRobert Love fr_eof(fp)); 90442e9a92fSRobert Love fc_frame_free(fp); 90542e9a92fSRobert Love } 90642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 90742e9a92fSRobert Love 90842e9a92fSRobert Love /* 90942e9a92fSRobert Love * The common exch_done for all request may not be good 91042e9a92fSRobert Love * if any request requires longer hold on exhange. XXX 91142e9a92fSRobert Love */ 91242e9a92fSRobert Love lport->tt.exch_done(sp); 91342e9a92fSRobert Love } 91442e9a92fSRobert Love 91542e9a92fSRobert Love /** 9163a3b42bfSRobert Love * fc_lport_reset() - Reset a local port 9173a3b42bfSRobert Love * @lport: The local port which should be reset 91842e9a92fSRobert Love * 91942e9a92fSRobert Love * Locking Note: This functions should not be called with the 92042e9a92fSRobert Love * lport lock held. 92142e9a92fSRobert Love */ 92242e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 92342e9a92fSRobert Love { 924f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 92542e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 92642e9a92fSRobert Love fc_lport_enter_reset(lport); 92742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 92842e9a92fSRobert Love return 0; 92942e9a92fSRobert Love } 93042e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 93142e9a92fSRobert Love 93242e9a92fSRobert Love /** 9333a3b42bfSRobert Love * fc_lport_reset_locked() - Reset the local port w/ the lport lock held 9343a3b42bfSRobert Love * @lport: The local port to be reset 93542e9a92fSRobert Love * 93642e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 93742e9a92fSRobert Love * this routine. 93842e9a92fSRobert Love */ 9391190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 94042e9a92fSRobert Love { 9413a3b42bfSRobert Love if (lport->dns_rdata) 9423a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 94342e9a92fSRobert Love 9443a3b42bfSRobert Love lport->ptp_rdata = NULL; 94542e9a92fSRobert Love 94642e9a92fSRobert Love lport->tt.disc_stop(lport); 94742e9a92fSRobert Love 9481f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 94942e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 950093bb6a2SJoe Eykholt 951093bb6a2SJoe Eykholt if (fc_host_port_id(lport->host)) 952093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, 0, NULL); 9531190d925SJoe Eykholt } 95442e9a92fSRobert Love 9551190d925SJoe Eykholt /** 9561190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 9573a3b42bfSRobert Love * @lport: The local port to be reset 9581190d925SJoe Eykholt * 9591190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9601190d925SJoe Eykholt * this routine. 9611190d925SJoe Eykholt */ 9621190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 9631190d925SJoe Eykholt { 9641190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 9651190d925SJoe Eykholt fc_lport_state(lport)); 9661190d925SJoe Eykholt 9678faecddbSChris Leech if (lport->vport) { 9688faecddbSChris Leech if (lport->link_up) 9698faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); 9708faecddbSChris Leech else 9718faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); 9728faecddbSChris Leech } 9731190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 9748faecddbSChris Leech fc_vports_linkchange(lport); 9751190d925SJoe Eykholt fc_lport_reset_locked(lport); 976bc0e17f6SVasu Dev if (lport->link_up) 97742e9a92fSRobert Love fc_lport_enter_flogi(lport); 97842e9a92fSRobert Love } 97942e9a92fSRobert Love 98042e9a92fSRobert Love /** 9813a3b42bfSRobert Love * fc_lport_enter_disabled() - Disable the local port 9823a3b42bfSRobert Love * @lport: The local port to be reset 9831190d925SJoe Eykholt * 9841190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9851190d925SJoe Eykholt * this routine. 9861190d925SJoe Eykholt */ 9871190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 9881190d925SJoe Eykholt { 9891190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 9901190d925SJoe Eykholt fc_lport_state(lport)); 9911190d925SJoe Eykholt 9921190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 9938faecddbSChris Leech fc_vports_linkchange(lport); 9941190d925SJoe Eykholt fc_lport_reset_locked(lport); 9951190d925SJoe Eykholt } 9961190d925SJoe Eykholt 9971190d925SJoe Eykholt /** 99834f42a07SRobert Love * fc_lport_error() - Handler for any errors 9993a3b42bfSRobert Love * @lport: The local port that the error was on 10003a3b42bfSRobert Love * @fp: The error code encoded in a frame pointer 100142e9a92fSRobert Love * 100242e9a92fSRobert Love * If the error was caused by a resource allocation failure 100342e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 100442e9a92fSRobert Love * after the e_d_tov time. 100542e9a92fSRobert Love */ 100642e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 100742e9a92fSRobert Love { 100842e9a92fSRobert Love unsigned long delay = 0; 10097414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 101042e9a92fSRobert Love PTR_ERR(fp), fc_lport_state(lport), 101142e9a92fSRobert Love lport->retry_count); 101242e9a92fSRobert Love 101342e9a92fSRobert Love if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { 101442e9a92fSRobert Love /* 101542e9a92fSRobert Love * Memory allocation failure, or the exchange timed out. 101642e9a92fSRobert Love * Retry after delay 101742e9a92fSRobert Love */ 101842e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 101942e9a92fSRobert Love lport->retry_count++; 102042e9a92fSRobert Love if (!fp) 102142e9a92fSRobert Love delay = msecs_to_jiffies(500); 102242e9a92fSRobert Love else 102342e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 102442e9a92fSRobert Love 102542e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 102642e9a92fSRobert Love } else { 102742e9a92fSRobert Love switch (lport->state) { 1028b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 102942e9a92fSRobert Love case LPORT_ST_READY: 103042e9a92fSRobert Love case LPORT_ST_RESET: 1031c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 10325baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1033c9866a54SChris Leech case LPORT_ST_RSPN_ID: 103442e9a92fSRobert Love case LPORT_ST_RFT_ID: 103542e9a92fSRobert Love case LPORT_ST_SCR: 103642e9a92fSRobert Love case LPORT_ST_DNS: 103742e9a92fSRobert Love case LPORT_ST_FLOGI: 103842e9a92fSRobert Love case LPORT_ST_LOGO: 103942e9a92fSRobert Love fc_lport_enter_reset(lport); 104042e9a92fSRobert Love break; 104142e9a92fSRobert Love } 104242e9a92fSRobert Love } 104342e9a92fSRobert Love } 104442e9a92fSRobert Love } 104542e9a92fSRobert Love 104642e9a92fSRobert Love /** 10477cccc157SChris Leech * fc_lport_ns_resp() - Handle response to a name server 10487cccc157SChris Leech * registration exchange 10497cccc157SChris Leech * @sp: current sequence in exchange 105042e9a92fSRobert Love * @fp: response frame 105142e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 105242e9a92fSRobert Love * 105342e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 10543a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 105542e9a92fSRobert Love * and then unlock the lport. 105642e9a92fSRobert Love */ 10577cccc157SChris Leech static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, 105842e9a92fSRobert Love void *lp_arg) 105942e9a92fSRobert Love { 106042e9a92fSRobert Love struct fc_lport *lport = lp_arg; 106142e9a92fSRobert Love struct fc_frame_header *fh; 106242e9a92fSRobert Love struct fc_ct_hdr *ct; 106342e9a92fSRobert Love 10647cccc157SChris Leech FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); 1065f657d299SJoe Eykholt 106642e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 106742e9a92fSRobert Love return; 106842e9a92fSRobert Love 106942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 107042e9a92fSRobert Love 10717cccc157SChris Leech if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFT_ID) { 10727cccc157SChris Leech FC_LPORT_DBG(lport, "Received a name server response, " 10737cccc157SChris Leech "but in state %s\n", fc_lport_state(lport)); 107476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 107576f6804eSAbhijeet Joglekar goto err; 107642e9a92fSRobert Love goto out; 107742e9a92fSRobert Love } 107842e9a92fSRobert Love 107976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 108076f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 108176f6804eSAbhijeet Joglekar goto err; 108276f6804eSAbhijeet Joglekar } 108376f6804eSAbhijeet Joglekar 108442e9a92fSRobert Love fh = fc_frame_header_get(fp); 108542e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 108642e9a92fSRobert Love 108742e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 108842e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 108942e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 109042e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 10917cccc157SChris Leech switch (lport->state) { 10927cccc157SChris Leech case LPORT_ST_RNN_ID: 1093c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); 10947cccc157SChris Leech break; 10957cccc157SChris Leech case LPORT_ST_RSNN_NN: 1096c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); 10977cccc157SChris Leech break; 10987cccc157SChris Leech case LPORT_ST_RSPN_ID: 1099c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 11007cccc157SChris Leech break; 11017cccc157SChris Leech case LPORT_ST_RFT_ID: 11027cccc157SChris Leech fc_lport_enter_scr(lport); 11037cccc157SChris Leech break; 11047cccc157SChris Leech default: 11057cccc157SChris Leech /* should have already been caught by state checks */ 11067cccc157SChris Leech break; 11077cccc157SChris Leech } 1108c9c7bd7aSChris Leech else 1109c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1110c9c7bd7aSChris Leech out: 1111c9c7bd7aSChris Leech fc_frame_free(fp); 1112c9c7bd7aSChris Leech err: 1113c9c7bd7aSChris Leech mutex_unlock(&lport->lp_mutex); 1114c9c7bd7aSChris Leech } 1115c9c7bd7aSChris Leech 1116c9c7bd7aSChris Leech /** 111734f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 111842e9a92fSRobert Love * @sp: current sequence in SCR exchange 111942e9a92fSRobert Love * @fp: response frame 112042e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 112142e9a92fSRobert Love * 112242e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 112342e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 112442e9a92fSRobert Love * and then unlock the lport. 112542e9a92fSRobert Love */ 112642e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 112742e9a92fSRobert Love void *lp_arg) 112842e9a92fSRobert Love { 112942e9a92fSRobert Love struct fc_lport *lport = lp_arg; 113042e9a92fSRobert Love u8 op; 113142e9a92fSRobert Love 1132f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1133f657d299SJoe Eykholt 113442e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 113542e9a92fSRobert Love return; 113642e9a92fSRobert Love 113742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 113842e9a92fSRobert Love 113942e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 11407414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 11417414705eSRobert Love "%s\n", fc_lport_state(lport)); 114276f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 114376f6804eSAbhijeet Joglekar goto err; 114442e9a92fSRobert Love goto out; 114542e9a92fSRobert Love } 114642e9a92fSRobert Love 114776f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 114876f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 114976f6804eSAbhijeet Joglekar goto err; 115076f6804eSAbhijeet Joglekar } 115176f6804eSAbhijeet Joglekar 115242e9a92fSRobert Love op = fc_frame_payload_op(fp); 115342e9a92fSRobert Love if (op == ELS_LS_ACC) 115442e9a92fSRobert Love fc_lport_enter_ready(lport); 115542e9a92fSRobert Love else 115642e9a92fSRobert Love fc_lport_error(lport, fp); 115742e9a92fSRobert Love 115842e9a92fSRobert Love out: 115942e9a92fSRobert Love fc_frame_free(fp); 116042e9a92fSRobert Love err: 116142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 116242e9a92fSRobert Love } 116342e9a92fSRobert Love 116442e9a92fSRobert Love /** 11653a3b42bfSRobert Love * fc_lport_enter_scr() - Send a SCR (State Change Register) request 11663a3b42bfSRobert Love * @lport: The local port to register for state changes 116742e9a92fSRobert Love * 116842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 116942e9a92fSRobert Love * this routine. 117042e9a92fSRobert Love */ 117142e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 117242e9a92fSRobert Love { 117342e9a92fSRobert Love struct fc_frame *fp; 117442e9a92fSRobert Love 11757414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 11767414705eSRobert Love fc_lport_state(lport)); 117742e9a92fSRobert Love 117842e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 117942e9a92fSRobert Love 118042e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 118142e9a92fSRobert Love if (!fp) { 118242e9a92fSRobert Love fc_lport_error(lport, fp); 118342e9a92fSRobert Love return; 118442e9a92fSRobert Love } 118542e9a92fSRobert Love 1186a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 118742e9a92fSRobert Love fc_lport_scr_resp, lport, lport->e_d_tov)) 11888f550f93SChris Leech fc_lport_error(lport, NULL); 118942e9a92fSRobert Love } 119042e9a92fSRobert Love 119142e9a92fSRobert Love /** 1192c914f7d1SChris Leech * fc_lport_enter_ns() - register some object with the name server 119342e9a92fSRobert Love * @lport: Fibre Channel local port to register 119442e9a92fSRobert Love * 119542e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 119642e9a92fSRobert Love * this routine. 119742e9a92fSRobert Love */ 1198c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) 119942e9a92fSRobert Love { 120042e9a92fSRobert Love struct fc_frame *fp; 1201c914f7d1SChris Leech enum fc_ns_req cmd; 1202c914f7d1SChris Leech int size = sizeof(struct fc_ct_hdr); 1203c914f7d1SChris Leech size_t len; 120442e9a92fSRobert Love 1205c914f7d1SChris Leech FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1206c914f7d1SChris Leech fc_lport_state_names[state], 12077414705eSRobert Love fc_lport_state(lport)); 120842e9a92fSRobert Love 1209c914f7d1SChris Leech fc_lport_state_enter(lport, state); 121042e9a92fSRobert Love 1211c914f7d1SChris Leech switch (state) { 1212c914f7d1SChris Leech case LPORT_ST_RNN_ID: 1213c914f7d1SChris Leech cmd = FC_NS_RNN_ID; 1214c914f7d1SChris Leech size += sizeof(struct fc_ns_rn_id); 121542e9a92fSRobert Love break; 1216c914f7d1SChris Leech case LPORT_ST_RSNN_NN: 1217c9866a54SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1218c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1219c914f7d1SChris Leech if (!len) 1220c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1221c914f7d1SChris Leech cmd = FC_NS_RSNN_NN; 1222c914f7d1SChris Leech size += sizeof(struct fc_ns_rsnn) + len; 1223c914f7d1SChris Leech break; 1224c914f7d1SChris Leech case LPORT_ST_RSPN_ID: 12255baa17c3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1226c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1227c914f7d1SChris Leech if (!len) 1228c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1229c914f7d1SChris Leech cmd = FC_NS_RSPN_ID; 1230c914f7d1SChris Leech size += sizeof(struct fc_ns_rspn) + len; 1231c914f7d1SChris Leech break; 1232c914f7d1SChris Leech case LPORT_ST_RFT_ID: 1233c914f7d1SChris Leech cmd = FC_NS_RFT_ID; 1234c914f7d1SChris Leech size += sizeof(struct fc_ns_rft); 1235c914f7d1SChris Leech break; 1236c914f7d1SChris Leech default: 1237c914f7d1SChris Leech fc_lport_error(lport, NULL); 1238c914f7d1SChris Leech return; 1239c914f7d1SChris Leech } 1240c914f7d1SChris Leech 1241c914f7d1SChris Leech fp = fc_frame_alloc(lport, size); 12425baa17c3SChris Leech if (!fp) { 12435baa17c3SChris Leech fc_lport_error(lport, fp); 12445baa17c3SChris Leech return; 12455baa17c3SChris Leech } 12465baa17c3SChris Leech 1247c914f7d1SChris Leech if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, 12487cccc157SChris Leech fc_lport_ns_resp, 1249c9c7bd7aSChris Leech lport, lport->e_d_tov)) 1250c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1251c9c7bd7aSChris Leech } 1252c9c7bd7aSChris Leech 125342e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 125442e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 125542e9a92fSRobert Love }; 125642e9a92fSRobert Love 125742e9a92fSRobert Love /** 12583a3b42bfSRobert Love * fc_rport_enter_dns() - Create a fc_rport for the name server 12593a3b42bfSRobert Love * @lport: The local port requesting a remote port for the name server 126042e9a92fSRobert Love * 126142e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 126242e9a92fSRobert Love * this routine. 126342e9a92fSRobert Love */ 126442e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 126542e9a92fSRobert Love { 1266ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 126742e9a92fSRobert Love 12687414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 12697414705eSRobert Love fc_lport_state(lport)); 127042e9a92fSRobert Love 127142e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 127242e9a92fSRobert Love 127348f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 12749737e6a7SRobert Love rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); 127548f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 12769fb9d328SJoe Eykholt if (!rdata) 127742e9a92fSRobert Love goto err; 127842e9a92fSRobert Love 127942e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 12809fb9d328SJoe Eykholt lport->tt.rport_login(rdata); 128142e9a92fSRobert Love return; 128242e9a92fSRobert Love 128342e9a92fSRobert Love err: 128442e9a92fSRobert Love fc_lport_error(lport, NULL); 128542e9a92fSRobert Love } 128642e9a92fSRobert Love 128742e9a92fSRobert Love /** 12883a3b42bfSRobert Love * fc_lport_timeout() - Handler for the retry_work timer 12893a3b42bfSRobert Love * @work: The work struct of the local port 129042e9a92fSRobert Love */ 129142e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 129242e9a92fSRobert Love { 129342e9a92fSRobert Love struct fc_lport *lport = 129442e9a92fSRobert Love container_of(work, struct fc_lport, 129542e9a92fSRobert Love retry_work.work); 129642e9a92fSRobert Love 129742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 129842e9a92fSRobert Love 129942e9a92fSRobert Love switch (lport->state) { 1300b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 130142e9a92fSRobert Love WARN_ON(1); 130242e9a92fSRobert Love break; 130322655ac2SJoe Eykholt case LPORT_ST_READY: 130422655ac2SJoe Eykholt WARN_ON(1); 130522655ac2SJoe Eykholt break; 130622655ac2SJoe Eykholt case LPORT_ST_RESET: 130722655ac2SJoe Eykholt break; 130842e9a92fSRobert Love case LPORT_ST_FLOGI: 130942e9a92fSRobert Love fc_lport_enter_flogi(lport); 131042e9a92fSRobert Love break; 131142e9a92fSRobert Love case LPORT_ST_DNS: 131242e9a92fSRobert Love fc_lport_enter_dns(lport); 131342e9a92fSRobert Love break; 1314c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 13155baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1316c9866a54SChris Leech case LPORT_ST_RSPN_ID: 131742e9a92fSRobert Love case LPORT_ST_RFT_ID: 1318c914f7d1SChris Leech fc_lport_enter_ns(lport, lport->state); 131942e9a92fSRobert Love break; 132042e9a92fSRobert Love case LPORT_ST_SCR: 132142e9a92fSRobert Love fc_lport_enter_scr(lport); 132242e9a92fSRobert Love break; 132342e9a92fSRobert Love case LPORT_ST_LOGO: 132442e9a92fSRobert Love fc_lport_enter_logo(lport); 132542e9a92fSRobert Love break; 132642e9a92fSRobert Love } 132742e9a92fSRobert Love 132842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 132942e9a92fSRobert Love } 133042e9a92fSRobert Love 133142e9a92fSRobert Love /** 133234f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 13333a3b42bfSRobert Love * @sp: The sequence that the LOGO was on 13343a3b42bfSRobert Love * @fp: The LOGO frame 13353a3b42bfSRobert Love * @lp_arg: The lport port that received the LOGO request 133642e9a92fSRobert Love * 133742e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 13383a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 133942e9a92fSRobert Love * and then unlock the lport. 134042e9a92fSRobert Love */ 134111b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 134242e9a92fSRobert Love void *lp_arg) 134342e9a92fSRobert Love { 134442e9a92fSRobert Love struct fc_lport *lport = lp_arg; 134542e9a92fSRobert Love u8 op; 134642e9a92fSRobert Love 1347f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1348f657d299SJoe Eykholt 134942e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 135042e9a92fSRobert Love return; 135142e9a92fSRobert Love 135242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 135342e9a92fSRobert Love 135442e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 13557414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 13567414705eSRobert Love "%s\n", fc_lport_state(lport)); 135776f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 135876f6804eSAbhijeet Joglekar goto err; 135942e9a92fSRobert Love goto out; 136042e9a92fSRobert Love } 136142e9a92fSRobert Love 136276f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 136376f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 136476f6804eSAbhijeet Joglekar goto err; 136576f6804eSAbhijeet Joglekar } 136676f6804eSAbhijeet Joglekar 136742e9a92fSRobert Love op = fc_frame_payload_op(fp); 136842e9a92fSRobert Love if (op == ELS_LS_ACC) 13691190d925SJoe Eykholt fc_lport_enter_disabled(lport); 137042e9a92fSRobert Love else 137142e9a92fSRobert Love fc_lport_error(lport, fp); 137242e9a92fSRobert Love 137342e9a92fSRobert Love out: 137442e9a92fSRobert Love fc_frame_free(fp); 137542e9a92fSRobert Love err: 137642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 137742e9a92fSRobert Love } 137811b56188SChris Leech EXPORT_SYMBOL(fc_lport_logo_resp); 137942e9a92fSRobert Love 138042e9a92fSRobert Love /** 138134f42a07SRobert Love * fc_rport_enter_logo() - Logout of the fabric 13823a3b42bfSRobert Love * @lport: The local port to be logged out 138342e9a92fSRobert Love * 138442e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 138542e9a92fSRobert Love * this routine. 138642e9a92fSRobert Love */ 138742e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 138842e9a92fSRobert Love { 138942e9a92fSRobert Love struct fc_frame *fp; 139042e9a92fSRobert Love struct fc_els_logo *logo; 139142e9a92fSRobert Love 13927414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 13937414705eSRobert Love fc_lport_state(lport)); 139442e9a92fSRobert Love 139542e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 13968faecddbSChris Leech fc_vports_linkchange(lport); 139742e9a92fSRobert Love 139842e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 139942e9a92fSRobert Love if (!fp) { 140042e9a92fSRobert Love fc_lport_error(lport, fp); 140142e9a92fSRobert Love return; 140242e9a92fSRobert Love } 140342e9a92fSRobert Love 1404a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1405a46f327aSJoe Eykholt fc_lport_logo_resp, lport, lport->e_d_tov)) 14068f550f93SChris Leech fc_lport_error(lport, NULL); 140742e9a92fSRobert Love } 140842e9a92fSRobert Love 140942e9a92fSRobert Love /** 141034f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 14113a3b42bfSRobert Love * @sp: The sequence that the FLOGI was on 14123a3b42bfSRobert Love * @fp: The FLOGI response frame 14133a3b42bfSRobert Love * @lp_arg: The lport port that received the FLOGI response 141442e9a92fSRobert Love * 141542e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 14163a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 141742e9a92fSRobert Love * and then unlock the lport. 141842e9a92fSRobert Love */ 141911b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 142042e9a92fSRobert Love void *lp_arg) 142142e9a92fSRobert Love { 142242e9a92fSRobert Love struct fc_lport *lport = lp_arg; 142342e9a92fSRobert Love struct fc_frame_header *fh; 142442e9a92fSRobert Love struct fc_els_flogi *flp; 142542e9a92fSRobert Love u32 did; 142642e9a92fSRobert Love u16 csp_flags; 142742e9a92fSRobert Love unsigned int r_a_tov; 142842e9a92fSRobert Love unsigned int e_d_tov; 142942e9a92fSRobert Love u16 mfs; 143042e9a92fSRobert Love 1431f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1432f657d299SJoe Eykholt 143342e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 143442e9a92fSRobert Love return; 143542e9a92fSRobert Love 143642e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 143742e9a92fSRobert Love 143842e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 14397414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 14407414705eSRobert Love "%s\n", fc_lport_state(lport)); 144176f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 144276f6804eSAbhijeet Joglekar goto err; 144342e9a92fSRobert Love goto out; 144442e9a92fSRobert Love } 144542e9a92fSRobert Love 144676f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 144776f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 144876f6804eSAbhijeet Joglekar goto err; 144976f6804eSAbhijeet Joglekar } 145076f6804eSAbhijeet Joglekar 145142e9a92fSRobert Love fh = fc_frame_header_get(fp); 145242e9a92fSRobert Love did = ntoh24(fh->fh_d_id); 145342e9a92fSRobert Love if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { 145442e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 145542e9a92fSRobert Love if (flp) { 145642e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 145742e9a92fSRobert Love FC_SP_BB_DATA_MASK; 145842e9a92fSRobert Love if (mfs >= FC_SP_MIN_MAX_PAYLOAD && 145942e9a92fSRobert Love mfs < lport->mfs) 146042e9a92fSRobert Love lport->mfs = mfs; 146142e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 146242e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 146342e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 146442e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 146542e9a92fSRobert Love e_d_tov /= 1000000; 1466db36c06cSChris Leech 1467db36c06cSChris Leech lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); 1468db36c06cSChris Leech 146942e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 147042e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 147142e9a92fSRobert Love lport->e_d_tov = e_d_tov; 147242e9a92fSRobert Love lport->r_a_tov = 2 * e_d_tov; 1473093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 14747414705eSRobert Love printk(KERN_INFO "libfc: Port (%6x) entered " 14757414705eSRobert Love "point to point mode\n", did); 147642e9a92fSRobert Love fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), 147742e9a92fSRobert Love get_unaligned_be64( 147842e9a92fSRobert Love &flp->fl_wwpn), 147942e9a92fSRobert Love get_unaligned_be64( 148042e9a92fSRobert Love &flp->fl_wwnn)); 148142e9a92fSRobert Love } else { 148242e9a92fSRobert Love lport->e_d_tov = e_d_tov; 148342e9a92fSRobert Love lport->r_a_tov = r_a_tov; 148442e9a92fSRobert Love fc_host_fabric_name(lport->host) = 148542e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 1486093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 148742e9a92fSRobert Love fc_lport_enter_dns(lport); 148842e9a92fSRobert Love } 148942e9a92fSRobert Love } 149042e9a92fSRobert Love } else { 14917414705eSRobert Love FC_LPORT_DBG(lport, "Bad FLOGI response\n"); 149242e9a92fSRobert Love } 149342e9a92fSRobert Love 149442e9a92fSRobert Love out: 149542e9a92fSRobert Love fc_frame_free(fp); 149642e9a92fSRobert Love err: 149742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 149842e9a92fSRobert Love } 149911b56188SChris Leech EXPORT_SYMBOL(fc_lport_flogi_resp); 150042e9a92fSRobert Love 150142e9a92fSRobert Love /** 150234f42a07SRobert Love * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager 150342e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 150442e9a92fSRobert Love * 150542e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 150642e9a92fSRobert Love * this routine. 150742e9a92fSRobert Love */ 150842e9a92fSRobert Love void fc_lport_enter_flogi(struct fc_lport *lport) 150942e9a92fSRobert Love { 151042e9a92fSRobert Love struct fc_frame *fp; 151142e9a92fSRobert Love 15127414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 15137414705eSRobert Love fc_lport_state(lport)); 151442e9a92fSRobert Love 151542e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 151642e9a92fSRobert Love 151742e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 151842e9a92fSRobert Love if (!fp) 151942e9a92fSRobert Love return fc_lport_error(lport, fp); 152042e9a92fSRobert Love 1521db36c06cSChris Leech if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, 1522db36c06cSChris Leech lport->vport ? ELS_FDISC : ELS_FLOGI, 152342e9a92fSRobert Love fc_lport_flogi_resp, lport, lport->e_d_tov)) 15248f550f93SChris Leech fc_lport_error(lport, NULL); 152542e9a92fSRobert Love } 152642e9a92fSRobert Love 15273a3b42bfSRobert Love /** 15283a3b42bfSRobert Love * fc_lport_config() - Configure a fc_lport 15293a3b42bfSRobert Love * @lport: The local port to be configured 15303a3b42bfSRobert Love */ 153142e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 153242e9a92fSRobert Love { 153342e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 153442e9a92fSRobert Love mutex_init(&lport->lp_mutex); 153542e9a92fSRobert Love 1536b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 153742e9a92fSRobert Love 153842e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 153942e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 154042e9a92fSRobert Love 154142e9a92fSRobert Love return 0; 154242e9a92fSRobert Love } 154342e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 154442e9a92fSRobert Love 15453a3b42bfSRobert Love /** 15463a3b42bfSRobert Love * fc_lport_init() - Initialize the lport layer for a local port 15473a3b42bfSRobert Love * @lport: The local port to initialize the exchange layer for 15483a3b42bfSRobert Love */ 154942e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 155042e9a92fSRobert Love { 155142e9a92fSRobert Love if (!lport->tt.lport_recv) 155242e9a92fSRobert Love lport->tt.lport_recv = fc_lport_recv_req; 155342e9a92fSRobert Love 155442e9a92fSRobert Love if (!lport->tt.lport_reset) 155542e9a92fSRobert Love lport->tt.lport_reset = fc_lport_reset; 155642e9a92fSRobert Love 155742e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 155842e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 155942e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 156042e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 156142e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 156242e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 156342e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 156442e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 156542e9a92fSRobert Love 156642e9a92fSRobert Love /* This value is also unchanging */ 156742e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 156842e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 156942e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 157042e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 157142e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 157242e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 157342e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 157442e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 157542e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 157642e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 157742e9a92fSRobert Love 157842e9a92fSRobert Love return 0; 157942e9a92fSRobert Love } 158042e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1581a51ab396SSteve Ma 1582a51ab396SSteve Ma /** 15833a3b42bfSRobert Love * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests 15843a3b42bfSRobert Love * @sp: The sequence for the FC Passthrough response 15853a3b42bfSRobert Love * @fp: The response frame 15863a3b42bfSRobert Love * @info_arg: The BSG info that the response is for 1587a51ab396SSteve Ma */ 1588a51ab396SSteve Ma static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, 1589a51ab396SSteve Ma void *info_arg) 1590a51ab396SSteve Ma { 1591a51ab396SSteve Ma struct fc_bsg_info *info = info_arg; 1592a51ab396SSteve Ma struct fc_bsg_job *job = info->job; 1593a51ab396SSteve Ma struct fc_lport *lport = info->lport; 1594a51ab396SSteve Ma struct fc_frame_header *fh; 1595a51ab396SSteve Ma size_t len; 1596a51ab396SSteve Ma void *buf; 1597a51ab396SSteve Ma 1598a51ab396SSteve Ma if (IS_ERR(fp)) { 1599a51ab396SSteve Ma job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? 1600a51ab396SSteve Ma -ECONNABORTED : -ETIMEDOUT; 1601a51ab396SSteve Ma job->reply_len = sizeof(uint32_t); 1602a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1603a51ab396SSteve Ma job->job_done(job); 1604a51ab396SSteve Ma kfree(info); 1605a51ab396SSteve Ma return; 1606a51ab396SSteve Ma } 1607a51ab396SSteve Ma 1608a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1609a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1610a51ab396SSteve Ma len = fr_len(fp) - sizeof(*fh); 1611a51ab396SSteve Ma buf = fc_frame_payload_get(fp, 0); 1612a51ab396SSteve Ma 1613a51ab396SSteve Ma if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { 1614a51ab396SSteve Ma /* Get the response code from the first frame payload */ 1615a51ab396SSteve Ma unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? 1616a51ab396SSteve Ma ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : 1617a51ab396SSteve Ma (unsigned short)fc_frame_payload_op(fp); 1618a51ab396SSteve Ma 1619a51ab396SSteve Ma /* Save the reply status of the job */ 1620a51ab396SSteve Ma job->reply->reply_data.ctels_reply.status = 1621a51ab396SSteve Ma (cmd == info->rsp_code) ? 1622a51ab396SSteve Ma FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; 1623a51ab396SSteve Ma } 1624a51ab396SSteve Ma 1625a51ab396SSteve Ma job->reply->reply_payload_rcv_len += 1626a51ab396SSteve Ma fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, 1627a51ab396SSteve Ma &info->offset, KM_BIO_SRC_IRQ, NULL); 1628a51ab396SSteve Ma 1629a51ab396SSteve Ma if (fr_eof(fp) == FC_EOF_T && 1630a51ab396SSteve Ma (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == 1631a51ab396SSteve Ma (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { 1632a51ab396SSteve Ma if (job->reply->reply_payload_rcv_len > 1633a51ab396SSteve Ma job->reply_payload.payload_len) 1634a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 1635a51ab396SSteve Ma job->reply_payload.payload_len; 1636a51ab396SSteve Ma job->reply->result = 0; 1637a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1638a51ab396SSteve Ma job->job_done(job); 1639a51ab396SSteve Ma kfree(info); 1640a51ab396SSteve Ma } 1641a51ab396SSteve Ma fc_frame_free(fp); 1642a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1643a51ab396SSteve Ma } 1644a51ab396SSteve Ma 1645a51ab396SSteve Ma /** 16463a3b42bfSRobert Love * fc_lport_els_request() - Send ELS passthrough request 16473a3b42bfSRobert Love * @job: The BSG Passthrough job 1648a51ab396SSteve Ma * @lport: The local port sending the request 16493a3b42bfSRobert Love * @did: The destination port id 1650a51ab396SSteve Ma * 1651a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1652a51ab396SSteve Ma * this routine. 1653a51ab396SSteve Ma */ 1654a51ab396SSteve Ma static int fc_lport_els_request(struct fc_bsg_job *job, 1655a51ab396SSteve Ma struct fc_lport *lport, 1656a51ab396SSteve Ma u32 did, u32 tov) 1657a51ab396SSteve Ma { 1658a51ab396SSteve Ma struct fc_bsg_info *info; 1659a51ab396SSteve Ma struct fc_frame *fp; 1660a51ab396SSteve Ma struct fc_frame_header *fh; 1661a51ab396SSteve Ma char *pp; 1662a51ab396SSteve Ma int len; 1663a51ab396SSteve Ma 1664a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_frame_header) + 1665a51ab396SSteve Ma job->request_payload.payload_len); 1666a51ab396SSteve Ma if (!fp) 1667a51ab396SSteve Ma return -ENOMEM; 1668a51ab396SSteve Ma 1669a51ab396SSteve Ma len = job->request_payload.payload_len; 1670a51ab396SSteve Ma pp = fc_frame_payload_get(fp, len); 1671a51ab396SSteve Ma 1672a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1673a51ab396SSteve Ma job->request_payload.sg_cnt, 1674a51ab396SSteve Ma pp, len); 1675a51ab396SSteve Ma 1676a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1677a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_ELS_REQ; 1678a51ab396SSteve Ma hton24(fh->fh_d_id, did); 1679a51ab396SSteve Ma hton24(fh->fh_s_id, fc_host_port_id(lport->host)); 1680a51ab396SSteve Ma fh->fh_type = FC_TYPE_ELS; 1681a51ab396SSteve Ma hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | 1682a51ab396SSteve Ma FC_FC_END_SEQ | FC_FC_SEQ_INIT); 1683a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1684a51ab396SSteve Ma fh->fh_df_ctl = 0; 1685a51ab396SSteve Ma fh->fh_parm_offset = 0; 1686a51ab396SSteve Ma 1687a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1688a51ab396SSteve Ma if (!info) { 1689a51ab396SSteve Ma fc_frame_free(fp); 1690a51ab396SSteve Ma return -ENOMEM; 1691a51ab396SSteve Ma } 1692a51ab396SSteve Ma 1693a51ab396SSteve Ma info->job = job; 1694a51ab396SSteve Ma info->lport = lport; 1695a51ab396SSteve Ma info->rsp_code = ELS_LS_ACC; 1696a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1697a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1698a51ab396SSteve Ma 1699a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1700a51ab396SSteve Ma NULL, info, tov)) 1701a51ab396SSteve Ma return -ECOMM; 1702a51ab396SSteve Ma return 0; 1703a51ab396SSteve Ma } 1704a51ab396SSteve Ma 1705a51ab396SSteve Ma /** 17063a3b42bfSRobert Love * fc_lport_ct_request() - Send CT Passthrough request 17073a3b42bfSRobert Love * @job: The BSG Passthrough job 1708a51ab396SSteve Ma * @lport: The local port sending the request 1709a51ab396SSteve Ma * @did: The destination FC-ID 17103a3b42bfSRobert Love * @tov: The timeout period to wait for the response 1711a51ab396SSteve Ma * 1712a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1713a51ab396SSteve Ma * this routine. 1714a51ab396SSteve Ma */ 1715a51ab396SSteve Ma static int fc_lport_ct_request(struct fc_bsg_job *job, 1716a51ab396SSteve Ma struct fc_lport *lport, u32 did, u32 tov) 1717a51ab396SSteve Ma { 1718a51ab396SSteve Ma struct fc_bsg_info *info; 1719a51ab396SSteve Ma struct fc_frame *fp; 1720a51ab396SSteve Ma struct fc_frame_header *fh; 1721a51ab396SSteve Ma struct fc_ct_req *ct; 1722a51ab396SSteve Ma size_t len; 1723a51ab396SSteve Ma 1724a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 1725a51ab396SSteve Ma job->request_payload.payload_len); 1726a51ab396SSteve Ma if (!fp) 1727a51ab396SSteve Ma return -ENOMEM; 1728a51ab396SSteve Ma 1729a51ab396SSteve Ma len = job->request_payload.payload_len; 1730a51ab396SSteve Ma ct = fc_frame_payload_get(fp, len); 1731a51ab396SSteve Ma 1732a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1733a51ab396SSteve Ma job->request_payload.sg_cnt, 1734a51ab396SSteve Ma ct, len); 1735a51ab396SSteve Ma 1736a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1737a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; 1738a51ab396SSteve Ma hton24(fh->fh_d_id, did); 1739a51ab396SSteve Ma hton24(fh->fh_s_id, fc_host_port_id(lport->host)); 1740a51ab396SSteve Ma fh->fh_type = FC_TYPE_CT; 1741a51ab396SSteve Ma hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | 1742a51ab396SSteve Ma FC_FC_END_SEQ | FC_FC_SEQ_INIT); 1743a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1744a51ab396SSteve Ma fh->fh_df_ctl = 0; 1745a51ab396SSteve Ma fh->fh_parm_offset = 0; 1746a51ab396SSteve Ma 1747a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1748a51ab396SSteve Ma if (!info) { 1749a51ab396SSteve Ma fc_frame_free(fp); 1750a51ab396SSteve Ma return -ENOMEM; 1751a51ab396SSteve Ma } 1752a51ab396SSteve Ma 1753a51ab396SSteve Ma info->job = job; 1754a51ab396SSteve Ma info->lport = lport; 1755a51ab396SSteve Ma info->rsp_code = FC_FS_ACC; 1756a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1757a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1758a51ab396SSteve Ma 1759a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1760a51ab396SSteve Ma NULL, info, tov)) 1761a51ab396SSteve Ma return -ECOMM; 1762a51ab396SSteve Ma return 0; 1763a51ab396SSteve Ma } 1764a51ab396SSteve Ma 1765a51ab396SSteve Ma /** 1766a51ab396SSteve Ma * fc_lport_bsg_request() - The common entry point for sending 17673a3b42bfSRobert Love * FC Passthrough requests 17683a3b42bfSRobert Love * @job: The BSG passthrough job 1769a51ab396SSteve Ma */ 1770a51ab396SSteve Ma int fc_lport_bsg_request(struct fc_bsg_job *job) 1771a51ab396SSteve Ma { 1772a51ab396SSteve Ma struct request *rsp = job->req->next_rq; 1773a51ab396SSteve Ma struct Scsi_Host *shost = job->shost; 1774a51ab396SSteve Ma struct fc_lport *lport = shost_priv(shost); 1775a51ab396SSteve Ma struct fc_rport *rport; 1776a51ab396SSteve Ma struct fc_rport_priv *rdata; 1777a51ab396SSteve Ma int rc = -EINVAL; 1778a51ab396SSteve Ma u32 did; 1779a51ab396SSteve Ma 1780a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 0; 1781a51ab396SSteve Ma rsp->resid_len = job->reply_payload.payload_len; 1782a51ab396SSteve Ma 1783a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1784a51ab396SSteve Ma 1785a51ab396SSteve Ma switch (job->request->msgcode) { 1786a51ab396SSteve Ma case FC_BSG_RPT_ELS: 1787a51ab396SSteve Ma rport = job->rport; 1788a51ab396SSteve Ma if (!rport) 1789a51ab396SSteve Ma break; 1790a51ab396SSteve Ma 1791a51ab396SSteve Ma rdata = rport->dd_data; 1792a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, rport->port_id, 1793a51ab396SSteve Ma rdata->e_d_tov); 1794a51ab396SSteve Ma break; 1795a51ab396SSteve Ma 1796a51ab396SSteve Ma case FC_BSG_RPT_CT: 1797a51ab396SSteve Ma rport = job->rport; 1798a51ab396SSteve Ma if (!rport) 1799a51ab396SSteve Ma break; 1800a51ab396SSteve Ma 1801a51ab396SSteve Ma rdata = rport->dd_data; 1802a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, rport->port_id, 1803a51ab396SSteve Ma rdata->e_d_tov); 1804a51ab396SSteve Ma break; 1805a51ab396SSteve Ma 1806a51ab396SSteve Ma case FC_BSG_HST_CT: 1807a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_ct.port_id); 1808a51ab396SSteve Ma if (did == FC_FID_DIR_SERV) 18093a3b42bfSRobert Love rdata = lport->dns_rdata; 1810a51ab396SSteve Ma else 1811a51ab396SSteve Ma rdata = lport->tt.rport_lookup(lport, did); 1812a51ab396SSteve Ma 1813a51ab396SSteve Ma if (!rdata) 1814a51ab396SSteve Ma break; 1815a51ab396SSteve Ma 1816a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); 1817a51ab396SSteve Ma break; 1818a51ab396SSteve Ma 1819a51ab396SSteve Ma case FC_BSG_HST_ELS_NOLOGIN: 1820a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_els.port_id); 1821a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); 1822a51ab396SSteve Ma break; 1823a51ab396SSteve Ma } 1824a51ab396SSteve Ma 1825a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1826a51ab396SSteve Ma return rc; 1827a51ab396SSteve Ma } 1828a51ab396SSteve Ma EXPORT_SYMBOL(fc_lport_bsg_request); 1829