142e9a92fSRobert Love /* 242e9a92fSRobert Love * Copyright(c) 2007 Intel Corporation. All rights reserved. 342e9a92fSRobert Love * 442e9a92fSRobert Love * This program is free software; you can redistribute it and/or modify it 542e9a92fSRobert Love * under the terms and conditions of the GNU General Public License, 642e9a92fSRobert Love * version 2, as published by the Free Software Foundation. 742e9a92fSRobert Love * 842e9a92fSRobert Love * This program is distributed in the hope it will be useful, but WITHOUT 942e9a92fSRobert Love * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1042e9a92fSRobert Love * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1142e9a92fSRobert Love * more details. 1242e9a92fSRobert Love * 1342e9a92fSRobert Love * You should have received a copy of the GNU General Public License along with 1442e9a92fSRobert Love * this program; if not, write to the Free Software Foundation, Inc., 1542e9a92fSRobert Love * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 1642e9a92fSRobert Love * 1742e9a92fSRobert Love * Maintained at www.Open-FCoE.org 1842e9a92fSRobert Love */ 1942e9a92fSRobert Love 2042e9a92fSRobert Love /* 2142e9a92fSRobert Love * PORT LOCKING NOTES 2242e9a92fSRobert Love * 2342e9a92fSRobert Love * These comments only apply to the 'port code' which consists of the lport, 2442e9a92fSRobert Love * disc and rport blocks. 2542e9a92fSRobert Love * 2642e9a92fSRobert Love * MOTIVATION 2742e9a92fSRobert Love * 2842e9a92fSRobert Love * The lport, disc and rport blocks all have mutexes that are used to protect 2942e9a92fSRobert Love * those objects. The main motivation for these locks is to prevent from 3042e9a92fSRobert Love * having an lport reset just before we send a frame. In that scenario the 3142e9a92fSRobert Love * lport's FID would get set to zero and then we'd send a frame with an 3242e9a92fSRobert Love * invalid SID. We also need to ensure that states don't change unexpectedly 3342e9a92fSRobert Love * while processing another state. 3442e9a92fSRobert Love * 3542e9a92fSRobert Love * HEIRARCHY 3642e9a92fSRobert Love * 3742e9a92fSRobert Love * The following heirarchy defines the locking rules. A greater lock 3842e9a92fSRobert Love * may be held before acquiring a lesser lock, but a lesser lock should never 3942e9a92fSRobert Love * be held while attempting to acquire a greater lock. Here is the heirarchy- 4042e9a92fSRobert Love * 4142e9a92fSRobert Love * lport > disc, lport > rport, disc > rport 4242e9a92fSRobert Love * 4342e9a92fSRobert Love * CALLBACKS 4442e9a92fSRobert Love * 4542e9a92fSRobert Love * The callbacks cause complications with this scheme. There is a callback 4642e9a92fSRobert Love * from the rport (to either lport or disc) and a callback from disc 4742e9a92fSRobert Love * (to the lport). 4842e9a92fSRobert Love * 4942e9a92fSRobert Love * As rports exit the rport state machine a callback is made to the owner of 5042e9a92fSRobert Love * the rport to notify success or failure. Since the callback is likely to 5142e9a92fSRobert Love * cause the lport or disc to grab its lock we cannot hold the rport lock 5242e9a92fSRobert Love * while making the callback. To ensure that the rport is not free'd while 5342e9a92fSRobert Love * processing the callback the rport callbacks are serialized through a 5442e9a92fSRobert Love * single-threaded workqueue. An rport would never be free'd while in a 5542e9a92fSRobert Love * callback handler becuase no other rport work in this queue can be executed 5642e9a92fSRobert Love * at the same time. 5742e9a92fSRobert Love * 5842e9a92fSRobert Love * When discovery succeeds or fails a callback is made to the lport as 59af901ca1SAndré Goddard Rosa * notification. Currently, successful discovery causes the lport to take no 6042e9a92fSRobert Love * action. A failure will cause the lport to reset. There is likely a circular 6142e9a92fSRobert Love * locking problem with this implementation. 6242e9a92fSRobert Love */ 6342e9a92fSRobert Love 6442e9a92fSRobert Love /* 6542e9a92fSRobert Love * LPORT LOCKING 6642e9a92fSRobert Love * 6742e9a92fSRobert Love * The critical sections protected by the lport's mutex are quite broad and 6842e9a92fSRobert Love * may be improved upon in the future. The lport code and its locking doesn't 6942e9a92fSRobert Love * influence the I/O path, so excessive locking doesn't penalize I/O 7042e9a92fSRobert Love * performance. 7142e9a92fSRobert Love * 7242e9a92fSRobert Love * The strategy is to lock whenever processing a request or response. Note 7342e9a92fSRobert Love * that every _enter_* function corresponds to a state change. They generally 7442e9a92fSRobert Love * change the lports state and then send a request out on the wire. We lock 7542e9a92fSRobert Love * before calling any of these functions to protect that state change. This 7642e9a92fSRobert Love * means that the entry points into the lport block manage the locks while 7742e9a92fSRobert Love * the state machine can transition between states (i.e. _enter_* functions) 7842e9a92fSRobert Love * while always staying protected. 7942e9a92fSRobert Love * 8042e9a92fSRobert Love * When handling responses we also hold the lport mutex broadly. When the 8142e9a92fSRobert Love * lport receives the response frame it locks the mutex and then calls the 8242e9a92fSRobert Love * appropriate handler for the particuar response. Generally a response will 8342e9a92fSRobert Love * trigger a state change and so the lock must already be held. 8442e9a92fSRobert Love * 8542e9a92fSRobert Love * Retries also have to consider the locking. The retries occur from a work 8642e9a92fSRobert Love * context and the work function will lock the lport and then retry the state 8742e9a92fSRobert Love * (i.e. _enter_* function). 8842e9a92fSRobert Love */ 8942e9a92fSRobert Love 9042e9a92fSRobert Love #include <linux/timer.h> 915a0e3ad6STejun Heo #include <linux/slab.h> 9242e9a92fSRobert Love #include <asm/unaligned.h> 9342e9a92fSRobert Love 9442e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 9542e9a92fSRobert Love 9642e9a92fSRobert Love #include <scsi/libfc.h> 9742e9a92fSRobert Love #include <scsi/fc_encode.h> 98a51ab396SSteve Ma #include <linux/scatterlist.h> 9942e9a92fSRobert Love 1008866a5d9SRobert Love #include "fc_libfc.h" 1018866a5d9SRobert Love 10242e9a92fSRobert Love /* Fabric IDs to use for point-to-point mode, chosen on whims. */ 10342e9a92fSRobert Love #define FC_LOCAL_PTP_FID_LO 0x010101 10442e9a92fSRobert Love #define FC_LOCAL_PTP_FID_HI 0x010102 10542e9a92fSRobert Love 10642e9a92fSRobert Love #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ 10742e9a92fSRobert Love 10842e9a92fSRobert Love static void fc_lport_error(struct fc_lport *, struct fc_frame *); 10942e9a92fSRobert Love 11042e9a92fSRobert Love static void fc_lport_enter_reset(struct fc_lport *); 11142e9a92fSRobert Love static void fc_lport_enter_flogi(struct fc_lport *); 11242e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *); 113c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); 11442e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *); 11542e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *); 11642e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *); 11742e9a92fSRobert Love 11842e9a92fSRobert Love static const char *fc_lport_state_names[] = { 119b1d9fd55SJoe Eykholt [LPORT_ST_DISABLED] = "disabled", 12042e9a92fSRobert Love [LPORT_ST_FLOGI] = "FLOGI", 12142e9a92fSRobert Love [LPORT_ST_DNS] = "dNS", 122c9c7bd7aSChris Leech [LPORT_ST_RNN_ID] = "RNN_ID", 1235baa17c3SChris Leech [LPORT_ST_RSNN_NN] = "RSNN_NN", 124c9866a54SChris Leech [LPORT_ST_RSPN_ID] = "RSPN_ID", 12542e9a92fSRobert Love [LPORT_ST_RFT_ID] = "RFT_ID", 126ab593b18SJoe Eykholt [LPORT_ST_RFF_ID] = "RFF_ID", 12742e9a92fSRobert Love [LPORT_ST_SCR] = "SCR", 12842e9a92fSRobert Love [LPORT_ST_READY] = "Ready", 12942e9a92fSRobert Love [LPORT_ST_LOGO] = "LOGO", 13042e9a92fSRobert Love [LPORT_ST_RESET] = "reset", 13142e9a92fSRobert Love }; 13242e9a92fSRobert Love 133a51ab396SSteve Ma /** 134a51ab396SSteve Ma * struct fc_bsg_info - FC Passthrough managemet structure 135a51ab396SSteve Ma * @job: The passthrough job 136a51ab396SSteve Ma * @lport: The local port to pass through a command 137a51ab396SSteve Ma * @rsp_code: The expected response code 138a51ab396SSteve Ma * @sg: job->reply_payload.sg_list 139a51ab396SSteve Ma * @nents: job->reply_payload.sg_cnt 140a51ab396SSteve Ma * @offset: The offset into the response data 141a51ab396SSteve Ma */ 142a51ab396SSteve Ma struct fc_bsg_info { 143a51ab396SSteve Ma struct fc_bsg_job *job; 144a51ab396SSteve Ma struct fc_lport *lport; 145a51ab396SSteve Ma u16 rsp_code; 146a51ab396SSteve Ma struct scatterlist *sg; 147a51ab396SSteve Ma u32 nents; 148a51ab396SSteve Ma size_t offset; 149a51ab396SSteve Ma }; 150a51ab396SSteve Ma 1513a3b42bfSRobert Love /** 1523a3b42bfSRobert Love * fc_frame_drop() - Dummy frame handler 1533a3b42bfSRobert Love * @lport: The local port the frame was received on 1543a3b42bfSRobert Love * @fp: The received frame 1553a3b42bfSRobert Love */ 15642e9a92fSRobert Love static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) 15742e9a92fSRobert Love { 15842e9a92fSRobert Love fc_frame_free(fp); 15942e9a92fSRobert Love return 0; 16042e9a92fSRobert Love } 16142e9a92fSRobert Love 16242e9a92fSRobert Love /** 16334f42a07SRobert Love * fc_lport_rport_callback() - Event handler for rport events 16442e9a92fSRobert Love * @lport: The lport which is receiving the event 1659fb9d328SJoe Eykholt * @rdata: private remote port data 16642e9a92fSRobert Love * @event: The event that occured 16742e9a92fSRobert Love * 16842e9a92fSRobert Love * Locking Note: The rport lock should not be held when calling 16942e9a92fSRobert Love * this function. 17042e9a92fSRobert Love */ 17142e9a92fSRobert Love static void fc_lport_rport_callback(struct fc_lport *lport, 1729fb9d328SJoe Eykholt struct fc_rport_priv *rdata, 17342e9a92fSRobert Love enum fc_rport_event event) 17442e9a92fSRobert Love { 175ce8b5df0SChris Leech FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event, 176f211fa51SJoe Eykholt rdata->ids.port_id); 17742e9a92fSRobert Love 178b5cbf083SJoe Eykholt mutex_lock(&lport->lp_mutex); 17942e9a92fSRobert Love switch (event) { 1804c0f62b5SJoe Eykholt case RPORT_EV_READY: 18142e9a92fSRobert Love if (lport->state == LPORT_ST_DNS) { 1823a3b42bfSRobert Love lport->dns_rdata = rdata; 183c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); 18442e9a92fSRobert Love } else { 1854c0f62b5SJoe Eykholt FC_LPORT_DBG(lport, "Received an READY event " 186ce8b5df0SChris Leech "on port (%6.6x) for the directory " 18742e9a92fSRobert Love "server, but the lport is not " 18842e9a92fSRobert Love "in the DNS state, it's in the " 189f211fa51SJoe Eykholt "%d state", rdata->ids.port_id, 19042e9a92fSRobert Love lport->state); 1919fb9d328SJoe Eykholt lport->tt.rport_logoff(rdata); 19242e9a92fSRobert Love } 19342e9a92fSRobert Love break; 19442e9a92fSRobert Love case RPORT_EV_LOGO: 19542e9a92fSRobert Love case RPORT_EV_FAILED: 19642e9a92fSRobert Love case RPORT_EV_STOP: 1973a3b42bfSRobert Love lport->dns_rdata = NULL; 19842e9a92fSRobert Love break; 19942e9a92fSRobert Love case RPORT_EV_NONE: 20042e9a92fSRobert Love break; 20142e9a92fSRobert Love } 202b5cbf083SJoe Eykholt mutex_unlock(&lport->lp_mutex); 20342e9a92fSRobert Love } 20442e9a92fSRobert Love 20542e9a92fSRobert Love /** 20634f42a07SRobert Love * fc_lport_state() - Return a string which represents the lport's state 20742e9a92fSRobert Love * @lport: The lport whose state is to converted to a string 20842e9a92fSRobert Love */ 20942e9a92fSRobert Love static const char *fc_lport_state(struct fc_lport *lport) 21042e9a92fSRobert Love { 21142e9a92fSRobert Love const char *cp; 21242e9a92fSRobert Love 21342e9a92fSRobert Love cp = fc_lport_state_names[lport->state]; 21442e9a92fSRobert Love if (!cp) 21542e9a92fSRobert Love cp = "unknown"; 21642e9a92fSRobert Love return cp; 21742e9a92fSRobert Love } 21842e9a92fSRobert Love 21942e9a92fSRobert Love /** 22034f42a07SRobert Love * fc_lport_ptp_setup() - Create an rport for point-to-point mode 22142e9a92fSRobert Love * @lport: The lport to attach the ptp rport to 2223a3b42bfSRobert Love * @remote_fid: The FID of the ptp rport 22342e9a92fSRobert Love * @remote_wwpn: The WWPN of the ptp rport 22442e9a92fSRobert Love * @remote_wwnn: The WWNN of the ptp rport 22542e9a92fSRobert Love */ 22642e9a92fSRobert Love static void fc_lport_ptp_setup(struct fc_lport *lport, 22742e9a92fSRobert Love u32 remote_fid, u64 remote_wwpn, 22842e9a92fSRobert Love u64 remote_wwnn) 22942e9a92fSRobert Love { 23048f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 2312f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 2323a3b42bfSRobert Love lport->tt.rport_logoff(lport->ptp_rdata); 2332f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 2342f2ac4a0SJoe Eykholt } 2353a3b42bfSRobert Love lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid); 2362f2ac4a0SJoe Eykholt kref_get(&lport->ptp_rdata->kref); 2373a3b42bfSRobert Love lport->ptp_rdata->ids.port_name = remote_wwpn; 2383a3b42bfSRobert Love lport->ptp_rdata->ids.node_name = remote_wwnn; 23948f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 24042e9a92fSRobert Love 2413a3b42bfSRobert Love lport->tt.rport_login(lport->ptp_rdata); 24242e9a92fSRobert Love 24342e9a92fSRobert Love fc_lport_enter_ready(lport); 24442e9a92fSRobert Love } 24542e9a92fSRobert Love 2463a3b42bfSRobert Love /** 2473a3b42bfSRobert Love * fc_get_host_port_type() - Return the port type of the given Scsi_Host 2483a3b42bfSRobert Love * @shost: The SCSI host whose port type is to be determined 2493a3b42bfSRobert Love */ 25042e9a92fSRobert Love void fc_get_host_port_type(struct Scsi_Host *shost) 25142e9a92fSRobert Love { 25242e9a92fSRobert Love /* TODO - currently just NPORT */ 25342e9a92fSRobert Love fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 25442e9a92fSRobert Love } 25542e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_type); 25642e9a92fSRobert Love 2573a3b42bfSRobert Love /** 2583a3b42bfSRobert Love * fc_get_host_port_state() - Return the port state of the given Scsi_Host 2593a3b42bfSRobert Love * @shost: The SCSI host whose port state is to be determined 2603a3b42bfSRobert Love */ 26142e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost) 26242e9a92fSRobert Love { 2633a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 26442e9a92fSRobert Love 2653a3b42bfSRobert Love mutex_lock(&lport->lp_mutex); 2663a3b42bfSRobert Love if (!lport->link_up) 2678faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 26842e9a92fSRobert Love else 2693a3b42bfSRobert Love switch (lport->state) { 2708faecddbSChris Leech case LPORT_ST_READY: 2718faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 2728faecddbSChris Leech break; 2738faecddbSChris Leech default: 27442e9a92fSRobert Love fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 27542e9a92fSRobert Love } 2763a3b42bfSRobert Love mutex_unlock(&lport->lp_mutex); 2778faecddbSChris Leech } 27842e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_state); 27942e9a92fSRobert Love 2803a3b42bfSRobert Love /** 2813a3b42bfSRobert Love * fc_get_host_speed() - Return the speed of the given Scsi_Host 2823a3b42bfSRobert Love * @shost: The SCSI host whose port speed is to be determined 2833a3b42bfSRobert Love */ 28442e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost) 28542e9a92fSRobert Love { 28642e9a92fSRobert Love struct fc_lport *lport = shost_priv(shost); 28742e9a92fSRobert Love 28842e9a92fSRobert Love fc_host_speed(shost) = lport->link_speed; 28942e9a92fSRobert Love } 29042e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_speed); 29142e9a92fSRobert Love 2923a3b42bfSRobert Love /** 2933a3b42bfSRobert Love * fc_get_host_stats() - Return the Scsi_Host's statistics 2943a3b42bfSRobert Love * @shost: The SCSI host whose statistics are to be returned 2953a3b42bfSRobert Love */ 29642e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) 29742e9a92fSRobert Love { 29842e9a92fSRobert Love struct fc_host_statistics *fcoe_stats; 2993a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 30042e9a92fSRobert Love struct timespec v0, v1; 301582b45bcSRobert Love unsigned int cpu; 30242e9a92fSRobert Love 3033a3b42bfSRobert Love fcoe_stats = &lport->host_stats; 30442e9a92fSRobert Love memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); 30542e9a92fSRobert Love 30642e9a92fSRobert Love jiffies_to_timespec(jiffies, &v0); 3073a3b42bfSRobert Love jiffies_to_timespec(lport->boot_time, &v1); 30842e9a92fSRobert Love fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); 30942e9a92fSRobert Love 310582b45bcSRobert Love for_each_possible_cpu(cpu) { 311582b45bcSRobert Love struct fcoe_dev_stats *stats; 312582b45bcSRobert Love 3133a3b42bfSRobert Love stats = per_cpu_ptr(lport->dev_stats, cpu); 314582b45bcSRobert Love 31542e9a92fSRobert Love fcoe_stats->tx_frames += stats->TxFrames; 31642e9a92fSRobert Love fcoe_stats->tx_words += stats->TxWords; 31742e9a92fSRobert Love fcoe_stats->rx_frames += stats->RxFrames; 31842e9a92fSRobert Love fcoe_stats->rx_words += stats->RxWords; 31942e9a92fSRobert Love fcoe_stats->error_frames += stats->ErrorFrames; 32042e9a92fSRobert Love fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; 32142e9a92fSRobert Love fcoe_stats->fcp_input_requests += stats->InputRequests; 32242e9a92fSRobert Love fcoe_stats->fcp_output_requests += stats->OutputRequests; 32342e9a92fSRobert Love fcoe_stats->fcp_control_requests += stats->ControlRequests; 32442e9a92fSRobert Love fcoe_stats->fcp_input_megabytes += stats->InputMegabytes; 32542e9a92fSRobert Love fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes; 32642e9a92fSRobert Love fcoe_stats->link_failure_count += stats->LinkFailureCount; 32742e9a92fSRobert Love } 32842e9a92fSRobert Love fcoe_stats->lip_count = -1; 32942e9a92fSRobert Love fcoe_stats->nos_count = -1; 33042e9a92fSRobert Love fcoe_stats->loss_of_sync_count = -1; 33142e9a92fSRobert Love fcoe_stats->loss_of_signal_count = -1; 33242e9a92fSRobert Love fcoe_stats->prim_seq_protocol_err_count = -1; 33342e9a92fSRobert Love fcoe_stats->dumped_frames = -1; 33442e9a92fSRobert Love return fcoe_stats; 33542e9a92fSRobert Love } 33642e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_stats); 33742e9a92fSRobert Love 3383a3b42bfSRobert Love /** 3393a3b42bfSRobert Love * fc_lport_flogi_fill() - Fill in FLOGI command for request 3403a3b42bfSRobert Love * @lport: The local port the FLOGI is for 3413a3b42bfSRobert Love * @flogi: The FLOGI command 3423a3b42bfSRobert Love * @op: The opcode 34342e9a92fSRobert Love */ 3443a3b42bfSRobert Love static void fc_lport_flogi_fill(struct fc_lport *lport, 3453a3b42bfSRobert Love struct fc_els_flogi *flogi, 34642e9a92fSRobert Love unsigned int op) 34742e9a92fSRobert Love { 34842e9a92fSRobert Love struct fc_els_csp *sp; 34942e9a92fSRobert Love struct fc_els_cssp *cp; 35042e9a92fSRobert Love 35142e9a92fSRobert Love memset(flogi, 0, sizeof(*flogi)); 35242e9a92fSRobert Love flogi->fl_cmd = (u8) op; 35342e9a92fSRobert Love put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); 35442e9a92fSRobert Love put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); 35542e9a92fSRobert Love sp = &flogi->fl_csp; 35642e9a92fSRobert Love sp->sp_hi_ver = 0x20; 35742e9a92fSRobert Love sp->sp_lo_ver = 0x20; 35842e9a92fSRobert Love sp->sp_bb_cred = htons(10); /* this gets set by gateway */ 35942e9a92fSRobert Love sp->sp_bb_data = htons((u16) lport->mfs); 36042e9a92fSRobert Love cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ 36142e9a92fSRobert Love cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); 36242e9a92fSRobert Love if (op != ELS_FLOGI) { 36342e9a92fSRobert Love sp->sp_features = htons(FC_SP_FT_CIRO); 36442e9a92fSRobert Love sp->sp_tot_seq = htons(255); /* seq. we accept */ 36542e9a92fSRobert Love sp->sp_rel_off = htons(0x1f); 36642e9a92fSRobert Love sp->sp_e_d_tov = htonl(lport->e_d_tov); 36742e9a92fSRobert Love 36842e9a92fSRobert Love cp->cp_rdfs = htons((u16) lport->mfs); 36942e9a92fSRobert Love cp->cp_con_seq = htons(255); 37042e9a92fSRobert Love cp->cp_open_seq = 1; 37142e9a92fSRobert Love } 37242e9a92fSRobert Love } 37342e9a92fSRobert Love 3743a3b42bfSRobert Love /** 3753a3b42bfSRobert Love * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port 3763a3b42bfSRobert Love * @lport: The local port to add a new FC-4 type to 3773a3b42bfSRobert Love * @type: The new FC-4 type 37842e9a92fSRobert Love */ 37942e9a92fSRobert Love static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) 38042e9a92fSRobert Love { 38142e9a92fSRobert Love __be32 *mp; 38242e9a92fSRobert Love 38342e9a92fSRobert Love mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; 38442e9a92fSRobert Love *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); 38542e9a92fSRobert Love } 38642e9a92fSRobert Love 38742e9a92fSRobert Love /** 38834f42a07SRobert Love * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. 3893a3b42bfSRobert Love * @sp: The sequence in the RLIR exchange 3903a3b42bfSRobert Love * @fp: The RLIR request frame 39142e9a92fSRobert Love * @lport: Fibre Channel local port recieving the RLIR 39242e9a92fSRobert Love * 3931b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 39442e9a92fSRobert Love * this function. 39542e9a92fSRobert Love */ 39642e9a92fSRobert Love static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp, 39742e9a92fSRobert Love struct fc_lport *lport) 39842e9a92fSRobert Love { 3997414705eSRobert Love FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", 40042e9a92fSRobert Love fc_lport_state(lport)); 40142e9a92fSRobert Love 40242e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 40342e9a92fSRobert Love fc_frame_free(fp); 40442e9a92fSRobert Love } 40542e9a92fSRobert Love 40642e9a92fSRobert Love /** 40734f42a07SRobert Love * fc_lport_recv_echo_req() - Handle received ECHO request 4083a3b42bfSRobert Love * @sp: The sequence in the ECHO exchange 40942e9a92fSRobert Love * @fp: ECHO request frame 4103a3b42bfSRobert Love * @lport: The local port recieving the ECHO 41142e9a92fSRobert Love * 4121b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 41342e9a92fSRobert Love * this function. 41442e9a92fSRobert Love */ 41542e9a92fSRobert Love static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp, 41642e9a92fSRobert Love struct fc_lport *lport) 41742e9a92fSRobert Love { 41842e9a92fSRobert Love struct fc_frame *fp; 41942e9a92fSRobert Love struct fc_exch *ep = fc_seq_exch(sp); 42042e9a92fSRobert Love unsigned int len; 42142e9a92fSRobert Love void *pp; 42242e9a92fSRobert Love void *dp; 42342e9a92fSRobert Love u32 f_ctl; 42442e9a92fSRobert Love 4251b69bc06SJoe Eykholt FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", 42642e9a92fSRobert Love fc_lport_state(lport)); 42742e9a92fSRobert Love 42842e9a92fSRobert Love len = fr_len(in_fp) - sizeof(struct fc_frame_header); 42942e9a92fSRobert Love pp = fc_frame_payload_get(in_fp, len); 43042e9a92fSRobert Love 43142e9a92fSRobert Love if (len < sizeof(__be32)) 43242e9a92fSRobert Love len = sizeof(__be32); 43342e9a92fSRobert Love 43442e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 43542e9a92fSRobert Love if (fp) { 43642e9a92fSRobert Love dp = fc_frame_payload_get(fp, len); 43742e9a92fSRobert Love memcpy(dp, pp, len); 4381b69bc06SJoe Eykholt *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); 43942e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 44042e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 44142e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 44242e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 44342e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 44442e9a92fSRobert Love } 44542e9a92fSRobert Love fc_frame_free(in_fp); 44642e9a92fSRobert Love } 44742e9a92fSRobert Love 44842e9a92fSRobert Love /** 4491b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 4501b69bc06SJoe Eykholt * @sp: The sequence in the RNID exchange 4511b69bc06SJoe Eykholt * @fp: The RNID request frame 4521b69bc06SJoe Eykholt * @lport: The local port recieving the RNID 45342e9a92fSRobert Love * 4541b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 45542e9a92fSRobert Love * this function. 45642e9a92fSRobert Love */ 45742e9a92fSRobert Love static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp, 45842e9a92fSRobert Love struct fc_lport *lport) 45942e9a92fSRobert Love { 46042e9a92fSRobert Love struct fc_frame *fp; 46142e9a92fSRobert Love struct fc_exch *ep = fc_seq_exch(sp); 46242e9a92fSRobert Love struct fc_els_rnid *req; 46342e9a92fSRobert Love struct { 46442e9a92fSRobert Love struct fc_els_rnid_resp rnid; 46542e9a92fSRobert Love struct fc_els_rnid_cid cid; 46642e9a92fSRobert Love struct fc_els_rnid_gen gen; 46742e9a92fSRobert Love } *rp; 46842e9a92fSRobert Love struct fc_seq_els_data rjt_data; 46942e9a92fSRobert Love u8 fmt; 47042e9a92fSRobert Love size_t len; 47142e9a92fSRobert Love u32 f_ctl; 47242e9a92fSRobert Love 4737414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 47442e9a92fSRobert Love fc_lport_state(lport)); 47542e9a92fSRobert Love 47642e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 47742e9a92fSRobert Love if (!req) { 47842e9a92fSRobert Love rjt_data.fp = NULL; 47942e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 48042e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 48142e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); 48242e9a92fSRobert Love } else { 48342e9a92fSRobert Love fmt = req->rnid_fmt; 48442e9a92fSRobert Love len = sizeof(*rp); 48542e9a92fSRobert Love if (fmt != ELS_RNIDF_GEN || 48642e9a92fSRobert Love ntohl(lport->rnid_gen.rnid_atype) == 0) { 48742e9a92fSRobert Love fmt = ELS_RNIDF_NONE; /* nothing to provide */ 48842e9a92fSRobert Love len -= sizeof(rp->gen); 48942e9a92fSRobert Love } 49042e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 49142e9a92fSRobert Love if (fp) { 49242e9a92fSRobert Love rp = fc_frame_payload_get(fp, len); 49342e9a92fSRobert Love memset(rp, 0, len); 49442e9a92fSRobert Love rp->rnid.rnid_cmd = ELS_LS_ACC; 49542e9a92fSRobert Love rp->rnid.rnid_fmt = fmt; 49642e9a92fSRobert Love rp->rnid.rnid_cid_len = sizeof(rp->cid); 49742e9a92fSRobert Love rp->cid.rnid_wwpn = htonll(lport->wwpn); 49842e9a92fSRobert Love rp->cid.rnid_wwnn = htonll(lport->wwnn); 49942e9a92fSRobert Love if (fmt == ELS_RNIDF_GEN) { 50042e9a92fSRobert Love rp->rnid.rnid_sid_len = sizeof(rp->gen); 50142e9a92fSRobert Love memcpy(&rp->gen, &lport->rnid_gen, 50242e9a92fSRobert Love sizeof(rp->gen)); 50342e9a92fSRobert Love } 50442e9a92fSRobert Love sp = lport->tt.seq_start_next(sp); 50542e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; 50642e9a92fSRobert Love f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; 50742e9a92fSRobert Love fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, 50842e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 50942e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 51042e9a92fSRobert Love } 51142e9a92fSRobert Love } 51242e9a92fSRobert Love fc_frame_free(in_fp); 51342e9a92fSRobert Love } 51442e9a92fSRobert Love 51542e9a92fSRobert Love /** 51634f42a07SRobert Love * fc_lport_recv_logo_req() - Handle received fabric LOGO request 5173a3b42bfSRobert Love * @sp: The sequence in the LOGO exchange 5183a3b42bfSRobert Love * @fp: The LOGO request frame 5193a3b42bfSRobert Love * @lport: The local port recieving the LOGO 52042e9a92fSRobert Love * 52142e9a92fSRobert Love * Locking Note: The lport lock is exected to be held before calling 52242e9a92fSRobert Love * this function. 52342e9a92fSRobert Love */ 52442e9a92fSRobert Love static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp, 52542e9a92fSRobert Love struct fc_lport *lport) 52642e9a92fSRobert Love { 52742e9a92fSRobert Love lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); 52842e9a92fSRobert Love fc_lport_enter_reset(lport); 52942e9a92fSRobert Love fc_frame_free(fp); 53042e9a92fSRobert Love } 53142e9a92fSRobert Love 53242e9a92fSRobert Love /** 53334f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 5343a3b42bfSRobert Love * @lport: The local port that should log into the fabric 53542e9a92fSRobert Love * 53642e9a92fSRobert Love * Locking Note: This function should not be called 53742e9a92fSRobert Love * with the lport lock held. 53842e9a92fSRobert Love */ 53942e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 54042e9a92fSRobert Love { 54142e9a92fSRobert Love int rc = -1; 54242e9a92fSRobert Love 54342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 54455a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || 54555a66d3cSVasu Dev lport->state == LPORT_ST_LOGO) { 54655a66d3cSVasu Dev fc_lport_state_enter(lport, LPORT_ST_RESET); 54742e9a92fSRobert Love fc_lport_enter_reset(lport); 54842e9a92fSRobert Love rc = 0; 54942e9a92fSRobert Love } 55042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 55142e9a92fSRobert Love 55242e9a92fSRobert Love return rc; 55342e9a92fSRobert Love } 55442e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 55542e9a92fSRobert Love 55642e9a92fSRobert Love /** 5578faecddbSChris Leech * __fc_linkup() - Handler for transport linkup events 5588faecddbSChris Leech * @lport: The lport whose link is up 5598faecddbSChris Leech * 5608faecddbSChris Leech * Locking: must be called with the lp_mutex held 5618faecddbSChris Leech */ 5628faecddbSChris Leech void __fc_linkup(struct fc_lport *lport) 5638faecddbSChris Leech { 5648faecddbSChris Leech if (!lport->link_up) { 5658faecddbSChris Leech lport->link_up = 1; 5668faecddbSChris Leech 5678faecddbSChris Leech if (lport->state == LPORT_ST_RESET) 5688faecddbSChris Leech fc_lport_enter_flogi(lport); 5698faecddbSChris Leech } 5708faecddbSChris Leech } 5718faecddbSChris Leech 5728faecddbSChris Leech /** 57334f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 5743a3b42bfSRobert Love * @lport: The local port whose link is up 57542e9a92fSRobert Love */ 57642e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 57742e9a92fSRobert Love { 578ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", 579e6d8a1b0SJoe Eykholt lport->host->host_no, fc_host_port_id(lport->host)); 58042e9a92fSRobert Love 58142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5828faecddbSChris Leech __fc_linkup(lport); 58342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 58442e9a92fSRobert Love } 58542e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 58642e9a92fSRobert Love 58742e9a92fSRobert Love /** 5888faecddbSChris Leech * __fc_linkdown() - Handler for transport linkdown events 5898faecddbSChris Leech * @lport: The lport whose link is down 5908faecddbSChris Leech * 5918faecddbSChris Leech * Locking: must be called with the lp_mutex held 5928faecddbSChris Leech */ 5938faecddbSChris Leech void __fc_linkdown(struct fc_lport *lport) 5948faecddbSChris Leech { 5958faecddbSChris Leech if (lport->link_up) { 5968faecddbSChris Leech lport->link_up = 0; 5978faecddbSChris Leech fc_lport_enter_reset(lport); 5988faecddbSChris Leech lport->tt.fcp_cleanup(lport); 5998faecddbSChris Leech } 6008faecddbSChris Leech } 6018faecddbSChris Leech 6028faecddbSChris Leech /** 60334f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 6043a3b42bfSRobert Love * @lport: The local port whose link is down 60542e9a92fSRobert Love */ 60642e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 60742e9a92fSRobert Love { 608ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", 609e6d8a1b0SJoe Eykholt lport->host->host_no, fc_host_port_id(lport->host)); 61042e9a92fSRobert Love 6118faecddbSChris Leech mutex_lock(&lport->lp_mutex); 6128faecddbSChris Leech __fc_linkdown(lport); 61342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 61442e9a92fSRobert Love } 61542e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 61642e9a92fSRobert Love 61742e9a92fSRobert Love /** 61834f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 6193a3b42bfSRobert Love * @lport: The local port to logoff the fabric 62042e9a92fSRobert Love * 62142e9a92fSRobert Love * Return value: 62242e9a92fSRobert Love * 0 for success, -1 for failure 62334f42a07SRobert Love */ 62442e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 62542e9a92fSRobert Love { 62642e9a92fSRobert Love lport->tt.disc_stop_final(lport); 62742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 6283a3b42bfSRobert Love if (lport->dns_rdata) 6293a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 630a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 631a0fd2e49SAbhijeet Joglekar lport->tt.rport_flush_queue(); 632a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 63342e9a92fSRobert Love fc_lport_enter_logo(lport); 63442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 635f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 63642e9a92fSRobert Love return 0; 63742e9a92fSRobert Love } 63842e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 63942e9a92fSRobert Love 64042e9a92fSRobert Love /** 6413a3b42bfSRobert Love * fc_lport_destroy() - Unregister a fc_lport 6423a3b42bfSRobert Love * @lport: The local port to unregister 64342e9a92fSRobert Love * 64442e9a92fSRobert Love * Note: 64542e9a92fSRobert Love * exit routine for fc_lport instance 64642e9a92fSRobert Love * clean-up all the allocated memory 64742e9a92fSRobert Love * and free up other system resources. 64842e9a92fSRobert Love * 64934f42a07SRobert Love */ 65042e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 65142e9a92fSRobert Love { 652bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 653b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 654bbf15669SAbhijeet Joglekar lport->link_up = 0; 65542e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 656bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 657bbf15669SAbhijeet Joglekar 65842e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 659e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 6601f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 66142e9a92fSRobert Love return 0; 66242e9a92fSRobert Love } 66342e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 66442e9a92fSRobert Love 66542e9a92fSRobert Love /** 6663a3b42bfSRobert Love * fc_set_mfs() - Set the maximum frame size for a local port 6673a3b42bfSRobert Love * @lport: The local port to set the MFS for 6683a3b42bfSRobert Love * @mfs: The new MFS 66934f42a07SRobert Love */ 67042e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 67142e9a92fSRobert Love { 67242e9a92fSRobert Love unsigned int old_mfs; 67342e9a92fSRobert Love int rc = -EINVAL; 67442e9a92fSRobert Love 67542e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 67642e9a92fSRobert Love 67742e9a92fSRobert Love old_mfs = lport->mfs; 67842e9a92fSRobert Love 67942e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 68042e9a92fSRobert Love mfs &= ~3; 68142e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 68242e9a92fSRobert Love mfs = FC_MAX_FRAME; 68342e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 68442e9a92fSRobert Love lport->mfs = mfs; 68542e9a92fSRobert Love rc = 0; 68642e9a92fSRobert Love } 68742e9a92fSRobert Love 68842e9a92fSRobert Love if (!rc && mfs < old_mfs) 68942e9a92fSRobert Love fc_lport_enter_reset(lport); 69042e9a92fSRobert Love 69142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 69242e9a92fSRobert Love 69342e9a92fSRobert Love return rc; 69442e9a92fSRobert Love } 69542e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 69642e9a92fSRobert Love 69742e9a92fSRobert Love /** 69834f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 6993a3b42bfSRobert Love * @lport: The local port receiving the event 70042e9a92fSRobert Love * @event: The discovery event 70142e9a92fSRobert Love */ 70242e9a92fSRobert Love void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) 70342e9a92fSRobert Love { 70442e9a92fSRobert Love switch (event) { 70542e9a92fSRobert Love case DISC_EV_SUCCESS: 7067414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 70742e9a92fSRobert Love break; 70842e9a92fSRobert Love case DISC_EV_FAILED: 709e6d8a1b0SJoe Eykholt printk(KERN_ERR "host%d: libfc: " 710ce8b5df0SChris Leech "Discovery failed for port (%6.6x)\n", 711e6d8a1b0SJoe Eykholt lport->host->host_no, fc_host_port_id(lport->host)); 71242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 71342e9a92fSRobert Love fc_lport_enter_reset(lport); 71442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 71542e9a92fSRobert Love break; 71642e9a92fSRobert Love case DISC_EV_NONE: 71742e9a92fSRobert Love WARN_ON(1); 71842e9a92fSRobert Love break; 71942e9a92fSRobert Love } 72042e9a92fSRobert Love } 72142e9a92fSRobert Love 72242e9a92fSRobert Love /** 72334f42a07SRobert Love * fc_rport_enter_ready() - Enter the ready state and start discovery 7243a3b42bfSRobert Love * @lport: The local port that is ready 72542e9a92fSRobert Love * 72642e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 72742e9a92fSRobert Love * this routine. 72842e9a92fSRobert Love */ 72942e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 73042e9a92fSRobert Love { 7317414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 7327414705eSRobert Love fc_lport_state(lport)); 73342e9a92fSRobert Love 73442e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 7358faecddbSChris Leech if (lport->vport) 7368faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); 7378faecddbSChris Leech fc_vports_linkchange(lport); 73842e9a92fSRobert Love 7393a3b42bfSRobert Love if (!lport->ptp_rdata) 74042e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 74142e9a92fSRobert Love } 74242e9a92fSRobert Love 74342e9a92fSRobert Love /** 744093bb6a2SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID 745093bb6a2SJoe Eykholt * @lport: The local port which will have its Port ID set. 746093bb6a2SJoe Eykholt * @port_id: The new port ID. 747093bb6a2SJoe Eykholt * @fp: The frame containing the incoming request, or NULL. 748093bb6a2SJoe Eykholt * 749093bb6a2SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 750093bb6a2SJoe Eykholt * this function. 751093bb6a2SJoe Eykholt */ 752093bb6a2SJoe Eykholt static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, 753093bb6a2SJoe Eykholt struct fc_frame *fp) 754093bb6a2SJoe Eykholt { 755093bb6a2SJoe Eykholt if (port_id) 756ce8b5df0SChris Leech printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", 757093bb6a2SJoe Eykholt lport->host->host_no, port_id); 758093bb6a2SJoe Eykholt 759093bb6a2SJoe Eykholt fc_host_port_id(lport->host) = port_id; 760093bb6a2SJoe Eykholt if (lport->tt.lport_set_port_id) 761093bb6a2SJoe Eykholt lport->tt.lport_set_port_id(lport, port_id, fp); 762093bb6a2SJoe Eykholt } 763093bb6a2SJoe Eykholt 764093bb6a2SJoe Eykholt /** 76534f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 76642e9a92fSRobert Love * @sp_in: The sequence the FLOGI is on 7673a3b42bfSRobert Love * @rx_fp: The FLOGI frame 7683a3b42bfSRobert Love * @lport: The local port that recieved the request 76942e9a92fSRobert Love * 77042e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 77142e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 77242e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 77342e9a92fSRobert Love * 7741b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 77542e9a92fSRobert Love * this function. 77642e9a92fSRobert Love */ 77742e9a92fSRobert Love static void fc_lport_recv_flogi_req(struct fc_seq *sp_in, 77842e9a92fSRobert Love struct fc_frame *rx_fp, 77942e9a92fSRobert Love struct fc_lport *lport) 78042e9a92fSRobert Love { 78142e9a92fSRobert Love struct fc_frame *fp; 78242e9a92fSRobert Love struct fc_frame_header *fh; 78342e9a92fSRobert Love struct fc_seq *sp; 78442e9a92fSRobert Love struct fc_exch *ep; 78542e9a92fSRobert Love struct fc_els_flogi *flp; 78642e9a92fSRobert Love struct fc_els_flogi *new_flp; 78742e9a92fSRobert Love u64 remote_wwpn; 78842e9a92fSRobert Love u32 remote_fid; 78942e9a92fSRobert Love u32 local_fid; 79042e9a92fSRobert Love u32 f_ctl; 79142e9a92fSRobert Love 7927414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 79342e9a92fSRobert Love fc_lport_state(lport)); 79442e9a92fSRobert Love 79542e9a92fSRobert Love fh = fc_frame_header_get(rx_fp); 79642e9a92fSRobert Love remote_fid = ntoh24(fh->fh_s_id); 79742e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 79842e9a92fSRobert Love if (!flp) 79942e9a92fSRobert Love goto out; 80042e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 80142e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 802e6d8a1b0SJoe Eykholt printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " 8039f8f3aa6SChris Leech "with same WWPN %16.16llx\n", 804e6d8a1b0SJoe Eykholt lport->host->host_no, remote_wwpn); 80542e9a92fSRobert Love goto out; 80642e9a92fSRobert Love } 8079f8f3aa6SChris Leech FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); 80842e9a92fSRobert Love 80942e9a92fSRobert Love /* 81042e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 81142e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 81242e9a92fSRobert Love * But if so, both of us could end up with the same FID. 81342e9a92fSRobert Love */ 81442e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 81542e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 81642e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 81742e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 81842e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 81942e9a92fSRobert Love } else if (!remote_fid) { 82042e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 82142e9a92fSRobert Love } 82242e9a92fSRobert Love 823093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, local_fid, rx_fp); 82442e9a92fSRobert Love 82542e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 82642e9a92fSRobert Love if (fp) { 82742e9a92fSRobert Love sp = lport->tt.seq_start_next(fr_seq(rx_fp)); 82842e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 82942e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 83042e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 83142e9a92fSRobert Love 83242e9a92fSRobert Love /* 83342e9a92fSRobert Love * Send the response. If this fails, the originator should 83442e9a92fSRobert Love * repeat the sequence. 83542e9a92fSRobert Love */ 83642e9a92fSRobert Love f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; 83742e9a92fSRobert Love ep = fc_seq_exch(sp); 838ccfc3098SJoe Eykholt fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, remote_fid, local_fid, 83942e9a92fSRobert Love FC_TYPE_ELS, f_ctl, 0); 84042e9a92fSRobert Love lport->tt.seq_send(lport, sp, fp); 84142e9a92fSRobert Love 84242e9a92fSRobert Love } else { 84342e9a92fSRobert Love fc_lport_error(lport, fp); 84442e9a92fSRobert Love } 84542e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 84642e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 84742e9a92fSRobert Love 84842e9a92fSRobert Love out: 84942e9a92fSRobert Love sp = fr_seq(rx_fp); 85042e9a92fSRobert Love fc_frame_free(rx_fp); 85142e9a92fSRobert Love } 85242e9a92fSRobert Love 85342e9a92fSRobert Love /** 85434f42a07SRobert Love * fc_lport_recv_req() - The generic lport request handler 8553a3b42bfSRobert Love * @lport: The local port that received the request 85642e9a92fSRobert Love * @sp: The sequence the request is on 8573a3b42bfSRobert Love * @fp: The request frame 85842e9a92fSRobert Love * 85942e9a92fSRobert Love * This function will see if the lport handles the request or 86042e9a92fSRobert Love * if an rport should handle the request. 86142e9a92fSRobert Love * 86242e9a92fSRobert Love * Locking Note: This function should not be called with the lport 86342e9a92fSRobert Love * lock held becuase it will grab the lock. 86442e9a92fSRobert Love */ 86542e9a92fSRobert Love static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp, 86642e9a92fSRobert Love struct fc_frame *fp) 86742e9a92fSRobert Love { 86842e9a92fSRobert Love struct fc_frame_header *fh = fc_frame_header_get(fp); 86942e9a92fSRobert Love void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *); 87042e9a92fSRobert Love 87142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 87242e9a92fSRobert Love 87342e9a92fSRobert Love /* 87442e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 87542e9a92fSRobert Love * RSCN here. These don't require a session. 87642e9a92fSRobert Love * Even if we had a session, it might not be ready. 87742e9a92fSRobert Love */ 878e9ba8b42SJoe Eykholt if (!lport->link_up) 879e9ba8b42SJoe Eykholt fc_frame_free(fp); 880e9ba8b42SJoe Eykholt else if (fh->fh_type == FC_TYPE_ELS && 881e9ba8b42SJoe Eykholt fh->fh_r_ctl == FC_RCTL_ELS_REQ) { 88242e9a92fSRobert Love /* 88342e9a92fSRobert Love * Check opcode. 88442e9a92fSRobert Love */ 885131203a1SJoe Eykholt recv = lport->tt.rport_recv_req; 88642e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 88742e9a92fSRobert Love case ELS_FLOGI: 88842e9a92fSRobert Love recv = fc_lport_recv_flogi_req; 88942e9a92fSRobert Love break; 89042e9a92fSRobert Love case ELS_LOGO: 89142e9a92fSRobert Love fh = fc_frame_header_get(fp); 89242e9a92fSRobert Love if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) 89342e9a92fSRobert Love recv = fc_lport_recv_logo_req; 89442e9a92fSRobert Love break; 89542e9a92fSRobert Love case ELS_RSCN: 89642e9a92fSRobert Love recv = lport->tt.disc_recv_req; 89742e9a92fSRobert Love break; 89842e9a92fSRobert Love case ELS_ECHO: 89942e9a92fSRobert Love recv = fc_lport_recv_echo_req; 90042e9a92fSRobert Love break; 90142e9a92fSRobert Love case ELS_RLIR: 90242e9a92fSRobert Love recv = fc_lport_recv_rlir_req; 90342e9a92fSRobert Love break; 90442e9a92fSRobert Love case ELS_RNID: 90542e9a92fSRobert Love recv = fc_lport_recv_rnid_req; 90642e9a92fSRobert Love break; 90742e9a92fSRobert Love } 90842e9a92fSRobert Love 90942e9a92fSRobert Love recv(sp, fp, lport); 91042e9a92fSRobert Love } else { 9117414705eSRobert Love FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n", 9127414705eSRobert Love fr_eof(fp)); 91342e9a92fSRobert Love fc_frame_free(fp); 91442e9a92fSRobert Love } 91542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 91642e9a92fSRobert Love 91742e9a92fSRobert Love /* 91842e9a92fSRobert Love * The common exch_done for all request may not be good 91942e9a92fSRobert Love * if any request requires longer hold on exhange. XXX 92042e9a92fSRobert Love */ 92142e9a92fSRobert Love lport->tt.exch_done(sp); 92242e9a92fSRobert Love } 92342e9a92fSRobert Love 92442e9a92fSRobert Love /** 9253a3b42bfSRobert Love * fc_lport_reset() - Reset a local port 9263a3b42bfSRobert Love * @lport: The local port which should be reset 92742e9a92fSRobert Love * 92842e9a92fSRobert Love * Locking Note: This functions should not be called with the 92942e9a92fSRobert Love * lport lock held. 93042e9a92fSRobert Love */ 93142e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 93242e9a92fSRobert Love { 933f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 93442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 93542e9a92fSRobert Love fc_lport_enter_reset(lport); 93642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 93742e9a92fSRobert Love return 0; 93842e9a92fSRobert Love } 93942e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 94042e9a92fSRobert Love 94142e9a92fSRobert Love /** 9423a3b42bfSRobert Love * fc_lport_reset_locked() - Reset the local port w/ the lport lock held 9433a3b42bfSRobert Love * @lport: The local port to be reset 94442e9a92fSRobert Love * 94542e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 94642e9a92fSRobert Love * this routine. 94742e9a92fSRobert Love */ 9481190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 94942e9a92fSRobert Love { 9503a3b42bfSRobert Love if (lport->dns_rdata) 9513a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 95242e9a92fSRobert Love 9532f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 9542f2ac4a0SJoe Eykholt lport->tt.rport_logoff(lport->ptp_rdata); 9552f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 9563a3b42bfSRobert Love lport->ptp_rdata = NULL; 9572f2ac4a0SJoe Eykholt } 95842e9a92fSRobert Love 95942e9a92fSRobert Love lport->tt.disc_stop(lport); 96042e9a92fSRobert Love 9611f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 96242e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 963093bb6a2SJoe Eykholt 964093bb6a2SJoe Eykholt if (fc_host_port_id(lport->host)) 965093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, 0, NULL); 9661190d925SJoe Eykholt } 96742e9a92fSRobert Love 9681190d925SJoe Eykholt /** 9691190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 9703a3b42bfSRobert Love * @lport: The local port to be reset 9711190d925SJoe Eykholt * 9721190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 9731190d925SJoe Eykholt * this routine. 9741190d925SJoe Eykholt */ 9751190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 9761190d925SJoe Eykholt { 9771190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 9781190d925SJoe Eykholt fc_lport_state(lport)); 9791190d925SJoe Eykholt 98055a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) 98155a66d3cSVasu Dev return; 98255a66d3cSVasu Dev 9838faecddbSChris Leech if (lport->vport) { 9848faecddbSChris Leech if (lport->link_up) 9858faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); 9868faecddbSChris Leech else 9878faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); 9888faecddbSChris Leech } 9891190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 9908faecddbSChris Leech fc_vports_linkchange(lport); 9911190d925SJoe Eykholt fc_lport_reset_locked(lport); 992bc0e17f6SVasu Dev if (lport->link_up) 99342e9a92fSRobert Love fc_lport_enter_flogi(lport); 99442e9a92fSRobert Love } 99542e9a92fSRobert Love 99642e9a92fSRobert Love /** 9973a3b42bfSRobert Love * fc_lport_enter_disabled() - Disable the local port 9983a3b42bfSRobert Love * @lport: The local port to be reset 9991190d925SJoe Eykholt * 10001190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 10011190d925SJoe Eykholt * this routine. 10021190d925SJoe Eykholt */ 10031190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 10041190d925SJoe Eykholt { 10051190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 10061190d925SJoe Eykholt fc_lport_state(lport)); 10071190d925SJoe Eykholt 10081190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 10098faecddbSChris Leech fc_vports_linkchange(lport); 10101190d925SJoe Eykholt fc_lport_reset_locked(lport); 10111190d925SJoe Eykholt } 10121190d925SJoe Eykholt 10131190d925SJoe Eykholt /** 101434f42a07SRobert Love * fc_lport_error() - Handler for any errors 10153a3b42bfSRobert Love * @lport: The local port that the error was on 10163a3b42bfSRobert Love * @fp: The error code encoded in a frame pointer 101742e9a92fSRobert Love * 101842e9a92fSRobert Love * If the error was caused by a resource allocation failure 101942e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 102042e9a92fSRobert Love * after the e_d_tov time. 102142e9a92fSRobert Love */ 102242e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 102342e9a92fSRobert Love { 102442e9a92fSRobert Love unsigned long delay = 0; 10257414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 102642e9a92fSRobert Love PTR_ERR(fp), fc_lport_state(lport), 102742e9a92fSRobert Love lport->retry_count); 102842e9a92fSRobert Love 102942e9a92fSRobert Love if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) { 103042e9a92fSRobert Love /* 103142e9a92fSRobert Love * Memory allocation failure, or the exchange timed out. 103242e9a92fSRobert Love * Retry after delay 103342e9a92fSRobert Love */ 103442e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 103542e9a92fSRobert Love lport->retry_count++; 103642e9a92fSRobert Love if (!fp) 103742e9a92fSRobert Love delay = msecs_to_jiffies(500); 103842e9a92fSRobert Love else 103942e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 104042e9a92fSRobert Love 104142e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 104242e9a92fSRobert Love } else { 104342e9a92fSRobert Love switch (lport->state) { 1044b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 104542e9a92fSRobert Love case LPORT_ST_READY: 104642e9a92fSRobert Love case LPORT_ST_RESET: 1047c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 10485baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1049c9866a54SChris Leech case LPORT_ST_RSPN_ID: 105042e9a92fSRobert Love case LPORT_ST_RFT_ID: 1051ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 105242e9a92fSRobert Love case LPORT_ST_SCR: 105342e9a92fSRobert Love case LPORT_ST_DNS: 105442e9a92fSRobert Love case LPORT_ST_FLOGI: 105542e9a92fSRobert Love case LPORT_ST_LOGO: 105642e9a92fSRobert Love fc_lport_enter_reset(lport); 105742e9a92fSRobert Love break; 105842e9a92fSRobert Love } 105942e9a92fSRobert Love } 106042e9a92fSRobert Love } 106142e9a92fSRobert Love } 106242e9a92fSRobert Love 106342e9a92fSRobert Love /** 10647cccc157SChris Leech * fc_lport_ns_resp() - Handle response to a name server 10657cccc157SChris Leech * registration exchange 10667cccc157SChris Leech * @sp: current sequence in exchange 106742e9a92fSRobert Love * @fp: response frame 106842e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 106942e9a92fSRobert Love * 107042e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 10713a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 107242e9a92fSRobert Love * and then unlock the lport. 107342e9a92fSRobert Love */ 10747cccc157SChris Leech static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, 107542e9a92fSRobert Love void *lp_arg) 107642e9a92fSRobert Love { 107742e9a92fSRobert Love struct fc_lport *lport = lp_arg; 107842e9a92fSRobert Love struct fc_frame_header *fh; 107942e9a92fSRobert Love struct fc_ct_hdr *ct; 108042e9a92fSRobert Love 10817cccc157SChris Leech FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); 1082f657d299SJoe Eykholt 108342e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 108442e9a92fSRobert Love return; 108542e9a92fSRobert Love 108642e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 108742e9a92fSRobert Love 1088ab593b18SJoe Eykholt if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { 10897cccc157SChris Leech FC_LPORT_DBG(lport, "Received a name server response, " 10907cccc157SChris Leech "but in state %s\n", fc_lport_state(lport)); 109176f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 109276f6804eSAbhijeet Joglekar goto err; 109342e9a92fSRobert Love goto out; 109442e9a92fSRobert Love } 109542e9a92fSRobert Love 109676f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 109776f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 109876f6804eSAbhijeet Joglekar goto err; 109976f6804eSAbhijeet Joglekar } 110076f6804eSAbhijeet Joglekar 110142e9a92fSRobert Love fh = fc_frame_header_get(fp); 110242e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 110342e9a92fSRobert Love 110442e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 110542e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 110642e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 110742e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 11087cccc157SChris Leech switch (lport->state) { 11097cccc157SChris Leech case LPORT_ST_RNN_ID: 1110c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); 11117cccc157SChris Leech break; 11127cccc157SChris Leech case LPORT_ST_RSNN_NN: 1113c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); 11147cccc157SChris Leech break; 11157cccc157SChris Leech case LPORT_ST_RSPN_ID: 1116c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 11177cccc157SChris Leech break; 11187cccc157SChris Leech case LPORT_ST_RFT_ID: 1119ab593b18SJoe Eykholt fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); 1120ab593b18SJoe Eykholt break; 1121ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 11227cccc157SChris Leech fc_lport_enter_scr(lport); 11237cccc157SChris Leech break; 11247cccc157SChris Leech default: 11257cccc157SChris Leech /* should have already been caught by state checks */ 11267cccc157SChris Leech break; 11277cccc157SChris Leech } 1128c9c7bd7aSChris Leech else 1129c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1130c9c7bd7aSChris Leech out: 1131c9c7bd7aSChris Leech fc_frame_free(fp); 1132c9c7bd7aSChris Leech err: 1133c9c7bd7aSChris Leech mutex_unlock(&lport->lp_mutex); 1134c9c7bd7aSChris Leech } 1135c9c7bd7aSChris Leech 1136c9c7bd7aSChris Leech /** 113734f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 113842e9a92fSRobert Love * @sp: current sequence in SCR exchange 113942e9a92fSRobert Love * @fp: response frame 114042e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 114142e9a92fSRobert Love * 114242e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 114342e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 114442e9a92fSRobert Love * and then unlock the lport. 114542e9a92fSRobert Love */ 114642e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 114742e9a92fSRobert Love void *lp_arg) 114842e9a92fSRobert Love { 114942e9a92fSRobert Love struct fc_lport *lport = lp_arg; 115042e9a92fSRobert Love u8 op; 115142e9a92fSRobert Love 1152f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1153f657d299SJoe Eykholt 115442e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 115542e9a92fSRobert Love return; 115642e9a92fSRobert Love 115742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 115842e9a92fSRobert Love 115942e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 11607414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 11617414705eSRobert Love "%s\n", fc_lport_state(lport)); 116276f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 116376f6804eSAbhijeet Joglekar goto err; 116442e9a92fSRobert Love goto out; 116542e9a92fSRobert Love } 116642e9a92fSRobert Love 116776f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 116876f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 116976f6804eSAbhijeet Joglekar goto err; 117076f6804eSAbhijeet Joglekar } 117176f6804eSAbhijeet Joglekar 117242e9a92fSRobert Love op = fc_frame_payload_op(fp); 117342e9a92fSRobert Love if (op == ELS_LS_ACC) 117442e9a92fSRobert Love fc_lport_enter_ready(lport); 117542e9a92fSRobert Love else 117642e9a92fSRobert Love fc_lport_error(lport, fp); 117742e9a92fSRobert Love 117842e9a92fSRobert Love out: 117942e9a92fSRobert Love fc_frame_free(fp); 118042e9a92fSRobert Love err: 118142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 118242e9a92fSRobert Love } 118342e9a92fSRobert Love 118442e9a92fSRobert Love /** 11853a3b42bfSRobert Love * fc_lport_enter_scr() - Send a SCR (State Change Register) request 11863a3b42bfSRobert Love * @lport: The local port to register for state changes 118742e9a92fSRobert Love * 118842e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 118942e9a92fSRobert Love * this routine. 119042e9a92fSRobert Love */ 119142e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 119242e9a92fSRobert Love { 119342e9a92fSRobert Love struct fc_frame *fp; 119442e9a92fSRobert Love 11957414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 11967414705eSRobert Love fc_lport_state(lport)); 119742e9a92fSRobert Love 119842e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 119942e9a92fSRobert Love 120042e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 120142e9a92fSRobert Love if (!fp) { 120242e9a92fSRobert Love fc_lport_error(lport, fp); 120342e9a92fSRobert Love return; 120442e9a92fSRobert Love } 120542e9a92fSRobert Love 1206a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 1207b94f8951SJoe Eykholt fc_lport_scr_resp, lport, 1208b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 12098f550f93SChris Leech fc_lport_error(lport, NULL); 121042e9a92fSRobert Love } 121142e9a92fSRobert Love 121242e9a92fSRobert Love /** 1213c914f7d1SChris Leech * fc_lport_enter_ns() - register some object with the name server 121442e9a92fSRobert Love * @lport: Fibre Channel local port to register 121542e9a92fSRobert Love * 121642e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 121742e9a92fSRobert Love * this routine. 121842e9a92fSRobert Love */ 1219c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) 122042e9a92fSRobert Love { 122142e9a92fSRobert Love struct fc_frame *fp; 1222c914f7d1SChris Leech enum fc_ns_req cmd; 1223c914f7d1SChris Leech int size = sizeof(struct fc_ct_hdr); 1224c914f7d1SChris Leech size_t len; 122542e9a92fSRobert Love 1226c914f7d1SChris Leech FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1227c914f7d1SChris Leech fc_lport_state_names[state], 12287414705eSRobert Love fc_lport_state(lport)); 122942e9a92fSRobert Love 1230c914f7d1SChris Leech fc_lport_state_enter(lport, state); 123142e9a92fSRobert Love 1232c914f7d1SChris Leech switch (state) { 1233c914f7d1SChris Leech case LPORT_ST_RNN_ID: 1234c914f7d1SChris Leech cmd = FC_NS_RNN_ID; 1235c914f7d1SChris Leech size += sizeof(struct fc_ns_rn_id); 123642e9a92fSRobert Love break; 1237c914f7d1SChris Leech case LPORT_ST_RSNN_NN: 1238c9866a54SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1239c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1240c914f7d1SChris Leech if (!len) 1241c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1242c914f7d1SChris Leech cmd = FC_NS_RSNN_NN; 1243c914f7d1SChris Leech size += sizeof(struct fc_ns_rsnn) + len; 1244c914f7d1SChris Leech break; 1245c914f7d1SChris Leech case LPORT_ST_RSPN_ID: 12465baa17c3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1247c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1248c914f7d1SChris Leech if (!len) 1249c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1250c914f7d1SChris Leech cmd = FC_NS_RSPN_ID; 1251c914f7d1SChris Leech size += sizeof(struct fc_ns_rspn) + len; 1252c914f7d1SChris Leech break; 1253c914f7d1SChris Leech case LPORT_ST_RFT_ID: 1254c914f7d1SChris Leech cmd = FC_NS_RFT_ID; 1255c914f7d1SChris Leech size += sizeof(struct fc_ns_rft); 1256c914f7d1SChris Leech break; 1257ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1258ab593b18SJoe Eykholt cmd = FC_NS_RFF_ID; 1259ab593b18SJoe Eykholt size += sizeof(struct fc_ns_rff_id); 1260ab593b18SJoe Eykholt break; 1261c914f7d1SChris Leech default: 1262c914f7d1SChris Leech fc_lport_error(lport, NULL); 1263c914f7d1SChris Leech return; 1264c914f7d1SChris Leech } 1265c914f7d1SChris Leech 1266c914f7d1SChris Leech fp = fc_frame_alloc(lport, size); 12675baa17c3SChris Leech if (!fp) { 12685baa17c3SChris Leech fc_lport_error(lport, fp); 12695baa17c3SChris Leech return; 12705baa17c3SChris Leech } 12715baa17c3SChris Leech 1272c914f7d1SChris Leech if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, 12737cccc157SChris Leech fc_lport_ns_resp, 1274b94f8951SJoe Eykholt lport, 3 * lport->r_a_tov)) 1275c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1276c9c7bd7aSChris Leech } 1277c9c7bd7aSChris Leech 127842e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 127942e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 128042e9a92fSRobert Love }; 128142e9a92fSRobert Love 128242e9a92fSRobert Love /** 12833a3b42bfSRobert Love * fc_rport_enter_dns() - Create a fc_rport for the name server 12843a3b42bfSRobert Love * @lport: The local port requesting a remote port for the name server 128542e9a92fSRobert Love * 128642e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 128742e9a92fSRobert Love * this routine. 128842e9a92fSRobert Love */ 128942e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 129042e9a92fSRobert Love { 1291ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 129242e9a92fSRobert Love 12937414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 12947414705eSRobert Love fc_lport_state(lport)); 129542e9a92fSRobert Love 129642e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 129742e9a92fSRobert Love 129848f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 12999737e6a7SRobert Love rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); 130048f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 13019fb9d328SJoe Eykholt if (!rdata) 130242e9a92fSRobert Love goto err; 130342e9a92fSRobert Love 130442e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 13059fb9d328SJoe Eykholt lport->tt.rport_login(rdata); 130642e9a92fSRobert Love return; 130742e9a92fSRobert Love 130842e9a92fSRobert Love err: 130942e9a92fSRobert Love fc_lport_error(lport, NULL); 131042e9a92fSRobert Love } 131142e9a92fSRobert Love 131242e9a92fSRobert Love /** 13133a3b42bfSRobert Love * fc_lport_timeout() - Handler for the retry_work timer 13143a3b42bfSRobert Love * @work: The work struct of the local port 131542e9a92fSRobert Love */ 131642e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 131742e9a92fSRobert Love { 131842e9a92fSRobert Love struct fc_lport *lport = 131942e9a92fSRobert Love container_of(work, struct fc_lport, 132042e9a92fSRobert Love retry_work.work); 132142e9a92fSRobert Love 132242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 132342e9a92fSRobert Love 132442e9a92fSRobert Love switch (lport->state) { 1325b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 132642e9a92fSRobert Love WARN_ON(1); 132742e9a92fSRobert Love break; 132822655ac2SJoe Eykholt case LPORT_ST_READY: 132922655ac2SJoe Eykholt WARN_ON(1); 133022655ac2SJoe Eykholt break; 133122655ac2SJoe Eykholt case LPORT_ST_RESET: 133222655ac2SJoe Eykholt break; 133342e9a92fSRobert Love case LPORT_ST_FLOGI: 133442e9a92fSRobert Love fc_lport_enter_flogi(lport); 133542e9a92fSRobert Love break; 133642e9a92fSRobert Love case LPORT_ST_DNS: 133742e9a92fSRobert Love fc_lport_enter_dns(lport); 133842e9a92fSRobert Love break; 1339c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 13405baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1341c9866a54SChris Leech case LPORT_ST_RSPN_ID: 134242e9a92fSRobert Love case LPORT_ST_RFT_ID: 1343ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1344c914f7d1SChris Leech fc_lport_enter_ns(lport, lport->state); 134542e9a92fSRobert Love break; 134642e9a92fSRobert Love case LPORT_ST_SCR: 134742e9a92fSRobert Love fc_lport_enter_scr(lport); 134842e9a92fSRobert Love break; 134942e9a92fSRobert Love case LPORT_ST_LOGO: 135042e9a92fSRobert Love fc_lport_enter_logo(lport); 135142e9a92fSRobert Love break; 135242e9a92fSRobert Love } 135342e9a92fSRobert Love 135442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 135542e9a92fSRobert Love } 135642e9a92fSRobert Love 135742e9a92fSRobert Love /** 135834f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 13593a3b42bfSRobert Love * @sp: The sequence that the LOGO was on 13603a3b42bfSRobert Love * @fp: The LOGO frame 13613a3b42bfSRobert Love * @lp_arg: The lport port that received the LOGO request 136242e9a92fSRobert Love * 136342e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 13643a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 136542e9a92fSRobert Love * and then unlock the lport. 136642e9a92fSRobert Love */ 136711b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 136842e9a92fSRobert Love void *lp_arg) 136942e9a92fSRobert Love { 137042e9a92fSRobert Love struct fc_lport *lport = lp_arg; 137142e9a92fSRobert Love u8 op; 137242e9a92fSRobert Love 1373f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1374f657d299SJoe Eykholt 137542e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 137642e9a92fSRobert Love return; 137742e9a92fSRobert Love 137842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 137942e9a92fSRobert Love 138042e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 13817414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 13827414705eSRobert Love "%s\n", fc_lport_state(lport)); 138376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 138476f6804eSAbhijeet Joglekar goto err; 138542e9a92fSRobert Love goto out; 138642e9a92fSRobert Love } 138742e9a92fSRobert Love 138876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 138976f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 139076f6804eSAbhijeet Joglekar goto err; 139176f6804eSAbhijeet Joglekar } 139276f6804eSAbhijeet Joglekar 139342e9a92fSRobert Love op = fc_frame_payload_op(fp); 139442e9a92fSRobert Love if (op == ELS_LS_ACC) 13951190d925SJoe Eykholt fc_lport_enter_disabled(lport); 139642e9a92fSRobert Love else 139742e9a92fSRobert Love fc_lport_error(lport, fp); 139842e9a92fSRobert Love 139942e9a92fSRobert Love out: 140042e9a92fSRobert Love fc_frame_free(fp); 140142e9a92fSRobert Love err: 140242e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 140342e9a92fSRobert Love } 140411b56188SChris Leech EXPORT_SYMBOL(fc_lport_logo_resp); 140542e9a92fSRobert Love 140642e9a92fSRobert Love /** 140734f42a07SRobert Love * fc_rport_enter_logo() - Logout of the fabric 14083a3b42bfSRobert Love * @lport: The local port to be logged out 140942e9a92fSRobert Love * 141042e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 141142e9a92fSRobert Love * this routine. 141242e9a92fSRobert Love */ 141342e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 141442e9a92fSRobert Love { 141542e9a92fSRobert Love struct fc_frame *fp; 141642e9a92fSRobert Love struct fc_els_logo *logo; 141742e9a92fSRobert Love 14187414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 14197414705eSRobert Love fc_lport_state(lport)); 142042e9a92fSRobert Love 142142e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 14228faecddbSChris Leech fc_vports_linkchange(lport); 142342e9a92fSRobert Love 142442e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 142542e9a92fSRobert Love if (!fp) { 142642e9a92fSRobert Love fc_lport_error(lport, fp); 142742e9a92fSRobert Love return; 142842e9a92fSRobert Love } 142942e9a92fSRobert Love 1430a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1431b94f8951SJoe Eykholt fc_lport_logo_resp, lport, 1432b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 14338f550f93SChris Leech fc_lport_error(lport, NULL); 143442e9a92fSRobert Love } 143542e9a92fSRobert Love 143642e9a92fSRobert Love /** 143734f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 14383a3b42bfSRobert Love * @sp: The sequence that the FLOGI was on 14393a3b42bfSRobert Love * @fp: The FLOGI response frame 14403a3b42bfSRobert Love * @lp_arg: The lport port that received the FLOGI response 144142e9a92fSRobert Love * 144242e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 14433a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 144442e9a92fSRobert Love * and then unlock the lport. 144542e9a92fSRobert Love */ 144611b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 144742e9a92fSRobert Love void *lp_arg) 144842e9a92fSRobert Love { 144942e9a92fSRobert Love struct fc_lport *lport = lp_arg; 145042e9a92fSRobert Love struct fc_frame_header *fh; 145142e9a92fSRobert Love struct fc_els_flogi *flp; 145242e9a92fSRobert Love u32 did; 145342e9a92fSRobert Love u16 csp_flags; 145442e9a92fSRobert Love unsigned int r_a_tov; 145542e9a92fSRobert Love unsigned int e_d_tov; 145642e9a92fSRobert Love u16 mfs; 145742e9a92fSRobert Love 1458f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1459f657d299SJoe Eykholt 146042e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 146142e9a92fSRobert Love return; 146242e9a92fSRobert Love 146342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 146442e9a92fSRobert Love 146542e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 14667414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 14677414705eSRobert Love "%s\n", fc_lport_state(lport)); 146876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 146976f6804eSAbhijeet Joglekar goto err; 147042e9a92fSRobert Love goto out; 147142e9a92fSRobert Love } 147242e9a92fSRobert Love 147376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 147476f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 147576f6804eSAbhijeet Joglekar goto err; 147676f6804eSAbhijeet Joglekar } 147776f6804eSAbhijeet Joglekar 147842e9a92fSRobert Love fh = fc_frame_header_get(fp); 147942e9a92fSRobert Love did = ntoh24(fh->fh_d_id); 148042e9a92fSRobert Love if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) { 148142e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 148242e9a92fSRobert Love if (flp) { 148342e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 148442e9a92fSRobert Love FC_SP_BB_DATA_MASK; 148542e9a92fSRobert Love if (mfs >= FC_SP_MIN_MAX_PAYLOAD && 148642e9a92fSRobert Love mfs < lport->mfs) 148742e9a92fSRobert Love lport->mfs = mfs; 148842e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 148942e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 149042e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 149142e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 149242e9a92fSRobert Love e_d_tov /= 1000000; 1493db36c06cSChris Leech 1494db36c06cSChris Leech lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); 1495db36c06cSChris Leech 149642e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 149742e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 149842e9a92fSRobert Love lport->e_d_tov = e_d_tov; 149942e9a92fSRobert Love lport->r_a_tov = 2 * e_d_tov; 1500093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 1501e6d8a1b0SJoe Eykholt printk(KERN_INFO "host%d: libfc: " 1502ce8b5df0SChris Leech "Port (%6.6x) entered " 1503e6d8a1b0SJoe Eykholt "point-to-point mode\n", 1504e6d8a1b0SJoe Eykholt lport->host->host_no, did); 150542e9a92fSRobert Love fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id), 150642e9a92fSRobert Love get_unaligned_be64( 150742e9a92fSRobert Love &flp->fl_wwpn), 150842e9a92fSRobert Love get_unaligned_be64( 150942e9a92fSRobert Love &flp->fl_wwnn)); 151042e9a92fSRobert Love } else { 151142e9a92fSRobert Love lport->e_d_tov = e_d_tov; 151242e9a92fSRobert Love lport->r_a_tov = r_a_tov; 151342e9a92fSRobert Love fc_host_fabric_name(lport->host) = 151442e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 1515093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 151642e9a92fSRobert Love fc_lport_enter_dns(lport); 151742e9a92fSRobert Love } 151842e9a92fSRobert Love } 151942e9a92fSRobert Love } else { 15207414705eSRobert Love FC_LPORT_DBG(lport, "Bad FLOGI response\n"); 152142e9a92fSRobert Love } 152242e9a92fSRobert Love 152342e9a92fSRobert Love out: 152442e9a92fSRobert Love fc_frame_free(fp); 152542e9a92fSRobert Love err: 152642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 152742e9a92fSRobert Love } 152811b56188SChris Leech EXPORT_SYMBOL(fc_lport_flogi_resp); 152942e9a92fSRobert Love 153042e9a92fSRobert Love /** 153134f42a07SRobert Love * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager 153242e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 153342e9a92fSRobert Love * 153442e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 153542e9a92fSRobert Love * this routine. 153642e9a92fSRobert Love */ 153742e9a92fSRobert Love void fc_lport_enter_flogi(struct fc_lport *lport) 153842e9a92fSRobert Love { 153942e9a92fSRobert Love struct fc_frame *fp; 154042e9a92fSRobert Love 15417414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 15427414705eSRobert Love fc_lport_state(lport)); 154342e9a92fSRobert Love 154442e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 154542e9a92fSRobert Love 154642e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 154742e9a92fSRobert Love if (!fp) 154842e9a92fSRobert Love return fc_lport_error(lport, fp); 154942e9a92fSRobert Love 1550db36c06cSChris Leech if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, 1551db36c06cSChris Leech lport->vport ? ELS_FDISC : ELS_FLOGI, 1552b94f8951SJoe Eykholt fc_lport_flogi_resp, lport, 1553b94f8951SJoe Eykholt lport->vport ? 2 * lport->r_a_tov : 1554b94f8951SJoe Eykholt lport->e_d_tov)) 15558f550f93SChris Leech fc_lport_error(lport, NULL); 155642e9a92fSRobert Love } 155742e9a92fSRobert Love 15583a3b42bfSRobert Love /** 15593a3b42bfSRobert Love * fc_lport_config() - Configure a fc_lport 15603a3b42bfSRobert Love * @lport: The local port to be configured 15613a3b42bfSRobert Love */ 156242e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 156342e9a92fSRobert Love { 156442e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 156542e9a92fSRobert Love mutex_init(&lport->lp_mutex); 156642e9a92fSRobert Love 1567b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 156842e9a92fSRobert Love 156942e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 157042e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 157142e9a92fSRobert Love 157242e9a92fSRobert Love return 0; 157342e9a92fSRobert Love } 157442e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 157542e9a92fSRobert Love 15763a3b42bfSRobert Love /** 15773a3b42bfSRobert Love * fc_lport_init() - Initialize the lport layer for a local port 15783a3b42bfSRobert Love * @lport: The local port to initialize the exchange layer for 15793a3b42bfSRobert Love */ 158042e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 158142e9a92fSRobert Love { 158242e9a92fSRobert Love if (!lport->tt.lport_recv) 158342e9a92fSRobert Love lport->tt.lport_recv = fc_lport_recv_req; 158442e9a92fSRobert Love 158542e9a92fSRobert Love if (!lport->tt.lport_reset) 158642e9a92fSRobert Love lport->tt.lport_reset = fc_lport_reset; 158742e9a92fSRobert Love 158842e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 158942e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 159042e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 159142e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 159242e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 159342e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 159442e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 159542e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 159642e9a92fSRobert Love 159742e9a92fSRobert Love /* This value is also unchanging */ 159842e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 159942e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 160042e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 160142e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 160242e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 160342e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 160442e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 160542e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 160642e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 160742e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 160842e9a92fSRobert Love 160942e9a92fSRobert Love return 0; 161042e9a92fSRobert Love } 161142e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1612a51ab396SSteve Ma 1613a51ab396SSteve Ma /** 16143a3b42bfSRobert Love * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests 16153a3b42bfSRobert Love * @sp: The sequence for the FC Passthrough response 16163a3b42bfSRobert Love * @fp: The response frame 16173a3b42bfSRobert Love * @info_arg: The BSG info that the response is for 1618a51ab396SSteve Ma */ 1619a51ab396SSteve Ma static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, 1620a51ab396SSteve Ma void *info_arg) 1621a51ab396SSteve Ma { 1622a51ab396SSteve Ma struct fc_bsg_info *info = info_arg; 1623a51ab396SSteve Ma struct fc_bsg_job *job = info->job; 1624a51ab396SSteve Ma struct fc_lport *lport = info->lport; 1625a51ab396SSteve Ma struct fc_frame_header *fh; 1626a51ab396SSteve Ma size_t len; 1627a51ab396SSteve Ma void *buf; 1628a51ab396SSteve Ma 1629a51ab396SSteve Ma if (IS_ERR(fp)) { 1630a51ab396SSteve Ma job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? 1631a51ab396SSteve Ma -ECONNABORTED : -ETIMEDOUT; 1632a51ab396SSteve Ma job->reply_len = sizeof(uint32_t); 1633a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1634a51ab396SSteve Ma job->job_done(job); 1635a51ab396SSteve Ma kfree(info); 1636a51ab396SSteve Ma return; 1637a51ab396SSteve Ma } 1638a51ab396SSteve Ma 1639a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1640a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1641a51ab396SSteve Ma len = fr_len(fp) - sizeof(*fh); 1642a51ab396SSteve Ma buf = fc_frame_payload_get(fp, 0); 1643a51ab396SSteve Ma 1644a51ab396SSteve Ma if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { 1645a51ab396SSteve Ma /* Get the response code from the first frame payload */ 1646a51ab396SSteve Ma unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? 1647a51ab396SSteve Ma ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : 1648a51ab396SSteve Ma (unsigned short)fc_frame_payload_op(fp); 1649a51ab396SSteve Ma 1650a51ab396SSteve Ma /* Save the reply status of the job */ 1651a51ab396SSteve Ma job->reply->reply_data.ctels_reply.status = 1652a51ab396SSteve Ma (cmd == info->rsp_code) ? 1653a51ab396SSteve Ma FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; 1654a51ab396SSteve Ma } 1655a51ab396SSteve Ma 1656a51ab396SSteve Ma job->reply->reply_payload_rcv_len += 1657a51ab396SSteve Ma fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, 1658a51ab396SSteve Ma &info->offset, KM_BIO_SRC_IRQ, NULL); 1659a51ab396SSteve Ma 1660a51ab396SSteve Ma if (fr_eof(fp) == FC_EOF_T && 1661a51ab396SSteve Ma (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == 1662a51ab396SSteve Ma (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { 1663a51ab396SSteve Ma if (job->reply->reply_payload_rcv_len > 1664a51ab396SSteve Ma job->reply_payload.payload_len) 1665a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 1666a51ab396SSteve Ma job->reply_payload.payload_len; 1667a51ab396SSteve Ma job->reply->result = 0; 1668a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1669a51ab396SSteve Ma job->job_done(job); 1670a51ab396SSteve Ma kfree(info); 1671a51ab396SSteve Ma } 1672a51ab396SSteve Ma fc_frame_free(fp); 1673a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1674a51ab396SSteve Ma } 1675a51ab396SSteve Ma 1676a51ab396SSteve Ma /** 16773a3b42bfSRobert Love * fc_lport_els_request() - Send ELS passthrough request 16783a3b42bfSRobert Love * @job: The BSG Passthrough job 1679a51ab396SSteve Ma * @lport: The local port sending the request 16803a3b42bfSRobert Love * @did: The destination port id 1681a51ab396SSteve Ma * 1682a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1683a51ab396SSteve Ma * this routine. 1684a51ab396SSteve Ma */ 1685a51ab396SSteve Ma static int fc_lport_els_request(struct fc_bsg_job *job, 1686a51ab396SSteve Ma struct fc_lport *lport, 1687a51ab396SSteve Ma u32 did, u32 tov) 1688a51ab396SSteve Ma { 1689a51ab396SSteve Ma struct fc_bsg_info *info; 1690a51ab396SSteve Ma struct fc_frame *fp; 1691a51ab396SSteve Ma struct fc_frame_header *fh; 1692a51ab396SSteve Ma char *pp; 1693a51ab396SSteve Ma int len; 1694a51ab396SSteve Ma 169570d919fbSYi Zou fp = fc_frame_alloc(lport, job->request_payload.payload_len); 1696a51ab396SSteve Ma if (!fp) 1697a51ab396SSteve Ma return -ENOMEM; 1698a51ab396SSteve Ma 1699a51ab396SSteve Ma len = job->request_payload.payload_len; 1700a51ab396SSteve Ma pp = fc_frame_payload_get(fp, len); 1701a51ab396SSteve Ma 1702a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1703a51ab396SSteve Ma job->request_payload.sg_cnt, 1704a51ab396SSteve Ma pp, len); 1705a51ab396SSteve Ma 1706a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1707a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_ELS_REQ; 1708a51ab396SSteve Ma hton24(fh->fh_d_id, did); 1709a51ab396SSteve Ma hton24(fh->fh_s_id, fc_host_port_id(lport->host)); 1710a51ab396SSteve Ma fh->fh_type = FC_TYPE_ELS; 1711a51ab396SSteve Ma hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | 1712a51ab396SSteve Ma FC_FC_END_SEQ | FC_FC_SEQ_INIT); 1713a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1714a51ab396SSteve Ma fh->fh_df_ctl = 0; 1715a51ab396SSteve Ma fh->fh_parm_offset = 0; 1716a51ab396SSteve Ma 1717a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1718a51ab396SSteve Ma if (!info) { 1719a51ab396SSteve Ma fc_frame_free(fp); 1720a51ab396SSteve Ma return -ENOMEM; 1721a51ab396SSteve Ma } 1722a51ab396SSteve Ma 1723a51ab396SSteve Ma info->job = job; 1724a51ab396SSteve Ma info->lport = lport; 1725a51ab396SSteve Ma info->rsp_code = ELS_LS_ACC; 1726a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1727a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1728a51ab396SSteve Ma 1729a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1730a51ab396SSteve Ma NULL, info, tov)) 1731a51ab396SSteve Ma return -ECOMM; 1732a51ab396SSteve Ma return 0; 1733a51ab396SSteve Ma } 1734a51ab396SSteve Ma 1735a51ab396SSteve Ma /** 17363a3b42bfSRobert Love * fc_lport_ct_request() - Send CT Passthrough request 17373a3b42bfSRobert Love * @job: The BSG Passthrough job 1738a51ab396SSteve Ma * @lport: The local port sending the request 1739a51ab396SSteve Ma * @did: The destination FC-ID 17403a3b42bfSRobert Love * @tov: The timeout period to wait for the response 1741a51ab396SSteve Ma * 1742a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1743a51ab396SSteve Ma * this routine. 1744a51ab396SSteve Ma */ 1745a51ab396SSteve Ma static int fc_lport_ct_request(struct fc_bsg_job *job, 1746a51ab396SSteve Ma struct fc_lport *lport, u32 did, u32 tov) 1747a51ab396SSteve Ma { 1748a51ab396SSteve Ma struct fc_bsg_info *info; 1749a51ab396SSteve Ma struct fc_frame *fp; 1750a51ab396SSteve Ma struct fc_frame_header *fh; 1751a51ab396SSteve Ma struct fc_ct_req *ct; 1752a51ab396SSteve Ma size_t len; 1753a51ab396SSteve Ma 1754a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 1755a51ab396SSteve Ma job->request_payload.payload_len); 1756a51ab396SSteve Ma if (!fp) 1757a51ab396SSteve Ma return -ENOMEM; 1758a51ab396SSteve Ma 1759a51ab396SSteve Ma len = job->request_payload.payload_len; 1760a51ab396SSteve Ma ct = fc_frame_payload_get(fp, len); 1761a51ab396SSteve Ma 1762a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1763a51ab396SSteve Ma job->request_payload.sg_cnt, 1764a51ab396SSteve Ma ct, len); 1765a51ab396SSteve Ma 1766a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1767a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; 1768a51ab396SSteve Ma hton24(fh->fh_d_id, did); 1769a51ab396SSteve Ma hton24(fh->fh_s_id, fc_host_port_id(lport->host)); 1770a51ab396SSteve Ma fh->fh_type = FC_TYPE_CT; 1771a51ab396SSteve Ma hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | 1772a51ab396SSteve Ma FC_FC_END_SEQ | FC_FC_SEQ_INIT); 1773a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1774a51ab396SSteve Ma fh->fh_df_ctl = 0; 1775a51ab396SSteve Ma fh->fh_parm_offset = 0; 1776a51ab396SSteve Ma 1777a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1778a51ab396SSteve Ma if (!info) { 1779a51ab396SSteve Ma fc_frame_free(fp); 1780a51ab396SSteve Ma return -ENOMEM; 1781a51ab396SSteve Ma } 1782a51ab396SSteve Ma 1783a51ab396SSteve Ma info->job = job; 1784a51ab396SSteve Ma info->lport = lport; 1785a51ab396SSteve Ma info->rsp_code = FC_FS_ACC; 1786a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1787a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1788a51ab396SSteve Ma 1789a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 1790a51ab396SSteve Ma NULL, info, tov)) 1791a51ab396SSteve Ma return -ECOMM; 1792a51ab396SSteve Ma return 0; 1793a51ab396SSteve Ma } 1794a51ab396SSteve Ma 1795a51ab396SSteve Ma /** 1796a51ab396SSteve Ma * fc_lport_bsg_request() - The common entry point for sending 17973a3b42bfSRobert Love * FC Passthrough requests 17983a3b42bfSRobert Love * @job: The BSG passthrough job 1799a51ab396SSteve Ma */ 1800a51ab396SSteve Ma int fc_lport_bsg_request(struct fc_bsg_job *job) 1801a51ab396SSteve Ma { 1802a51ab396SSteve Ma struct request *rsp = job->req->next_rq; 1803a51ab396SSteve Ma struct Scsi_Host *shost = job->shost; 1804a51ab396SSteve Ma struct fc_lport *lport = shost_priv(shost); 1805a51ab396SSteve Ma struct fc_rport *rport; 1806a51ab396SSteve Ma struct fc_rport_priv *rdata; 1807a51ab396SSteve Ma int rc = -EINVAL; 1808a51ab396SSteve Ma u32 did; 1809a51ab396SSteve Ma 1810a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 0; 1811b248df30SHugh Daschbach if (rsp) 1812a51ab396SSteve Ma rsp->resid_len = job->reply_payload.payload_len; 1813a51ab396SSteve Ma 1814a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1815a51ab396SSteve Ma 1816a51ab396SSteve Ma switch (job->request->msgcode) { 1817a51ab396SSteve Ma case FC_BSG_RPT_ELS: 1818a51ab396SSteve Ma rport = job->rport; 1819a51ab396SSteve Ma if (!rport) 1820a51ab396SSteve Ma break; 1821a51ab396SSteve Ma 1822a51ab396SSteve Ma rdata = rport->dd_data; 1823a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, rport->port_id, 1824a51ab396SSteve Ma rdata->e_d_tov); 1825a51ab396SSteve Ma break; 1826a51ab396SSteve Ma 1827a51ab396SSteve Ma case FC_BSG_RPT_CT: 1828a51ab396SSteve Ma rport = job->rport; 1829a51ab396SSteve Ma if (!rport) 1830a51ab396SSteve Ma break; 1831a51ab396SSteve Ma 1832a51ab396SSteve Ma rdata = rport->dd_data; 1833a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, rport->port_id, 1834a51ab396SSteve Ma rdata->e_d_tov); 1835a51ab396SSteve Ma break; 1836a51ab396SSteve Ma 1837a51ab396SSteve Ma case FC_BSG_HST_CT: 1838a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_ct.port_id); 1839a51ab396SSteve Ma if (did == FC_FID_DIR_SERV) 18403a3b42bfSRobert Love rdata = lport->dns_rdata; 1841a51ab396SSteve Ma else 1842a51ab396SSteve Ma rdata = lport->tt.rport_lookup(lport, did); 1843a51ab396SSteve Ma 1844a51ab396SSteve Ma if (!rdata) 1845a51ab396SSteve Ma break; 1846a51ab396SSteve Ma 1847a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); 1848a51ab396SSteve Ma break; 1849a51ab396SSteve Ma 1850a51ab396SSteve Ma case FC_BSG_HST_ELS_NOLOGIN: 1851a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_els.port_id); 1852a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); 1853a51ab396SSteve Ma break; 1854a51ab396SSteve Ma } 1855a51ab396SSteve Ma 1856a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1857a51ab396SSteve Ma return rc; 1858a51ab396SSteve Ma } 1859a51ab396SSteve Ma EXPORT_SYMBOL(fc_lport_bsg_request); 1860