142e9a92fSRobert Love /* 242e9a92fSRobert Love * Copyright(c) 2007 Intel Corporation. All rights reserved. 342e9a92fSRobert Love * 442e9a92fSRobert Love * This program is free software; you can redistribute it and/or modify it 542e9a92fSRobert Love * under the terms and conditions of the GNU General Public License, 642e9a92fSRobert Love * version 2, as published by the Free Software Foundation. 742e9a92fSRobert Love * 842e9a92fSRobert Love * This program is distributed in the hope it will be useful, but WITHOUT 942e9a92fSRobert Love * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1042e9a92fSRobert Love * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1142e9a92fSRobert Love * more details. 1242e9a92fSRobert Love * 1342e9a92fSRobert Love * You should have received a copy of the GNU General Public License along with 1442e9a92fSRobert Love * this program; if not, write to the Free Software Foundation, Inc., 1542e9a92fSRobert Love * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 1642e9a92fSRobert Love * 1742e9a92fSRobert Love * Maintained at www.Open-FCoE.org 1842e9a92fSRobert Love */ 1942e9a92fSRobert Love 2042e9a92fSRobert Love /* 2142e9a92fSRobert Love * PORT LOCKING NOTES 2242e9a92fSRobert Love * 2342e9a92fSRobert Love * These comments only apply to the 'port code' which consists of the lport, 2442e9a92fSRobert Love * disc and rport blocks. 2542e9a92fSRobert Love * 2642e9a92fSRobert Love * MOTIVATION 2742e9a92fSRobert Love * 2842e9a92fSRobert Love * The lport, disc and rport blocks all have mutexes that are used to protect 2942e9a92fSRobert Love * those objects. The main motivation for these locks is to prevent from 3042e9a92fSRobert Love * having an lport reset just before we send a frame. In that scenario the 3142e9a92fSRobert Love * lport's FID would get set to zero and then we'd send a frame with an 3242e9a92fSRobert Love * invalid SID. We also need to ensure that states don't change unexpectedly 3342e9a92fSRobert Love * while processing another state. 3442e9a92fSRobert Love * 35732bee7aSUwe Kleine-König * HIERARCHY 3642e9a92fSRobert Love * 37732bee7aSUwe Kleine-König * The following hierarchy defines the locking rules. A greater lock 3842e9a92fSRobert Love * may be held before acquiring a lesser lock, but a lesser lock should never 39732bee7aSUwe Kleine-König * be held while attempting to acquire a greater lock. Here is the hierarchy- 4042e9a92fSRobert Love * 4142e9a92fSRobert Love * lport > disc, lport > rport, disc > rport 4242e9a92fSRobert Love * 4342e9a92fSRobert Love * CALLBACKS 4442e9a92fSRobert Love * 4542e9a92fSRobert Love * The callbacks cause complications with this scheme. There is a callback 4642e9a92fSRobert Love * from the rport (to either lport or disc) and a callback from disc 4742e9a92fSRobert Love * (to the lport). 4842e9a92fSRobert Love * 4942e9a92fSRobert Love * As rports exit the rport state machine a callback is made to the owner of 5042e9a92fSRobert Love * the rport to notify success or failure. Since the callback is likely to 5142e9a92fSRobert Love * cause the lport or disc to grab its lock we cannot hold the rport lock 5242e9a92fSRobert Love * while making the callback. To ensure that the rport is not free'd while 5342e9a92fSRobert Love * processing the callback the rport callbacks are serialized through a 5442e9a92fSRobert Love * single-threaded workqueue. An rport would never be free'd while in a 5525985edcSLucas De Marchi * callback handler because no other rport work in this queue can be executed 5642e9a92fSRobert Love * at the same time. 5742e9a92fSRobert Love * 5842e9a92fSRobert Love * When discovery succeeds or fails a callback is made to the lport as 59af901ca1SAndré Goddard Rosa * notification. Currently, successful discovery causes the lport to take no 6042e9a92fSRobert Love * action. A failure will cause the lport to reset. There is likely a circular 6142e9a92fSRobert Love * locking problem with this implementation. 6242e9a92fSRobert Love */ 6342e9a92fSRobert Love 6442e9a92fSRobert Love /* 6542e9a92fSRobert Love * LPORT LOCKING 6642e9a92fSRobert Love * 6742e9a92fSRobert Love * The critical sections protected by the lport's mutex are quite broad and 6842e9a92fSRobert Love * may be improved upon in the future. The lport code and its locking doesn't 6942e9a92fSRobert Love * influence the I/O path, so excessive locking doesn't penalize I/O 7042e9a92fSRobert Love * performance. 7142e9a92fSRobert Love * 7242e9a92fSRobert Love * The strategy is to lock whenever processing a request or response. Note 7342e9a92fSRobert Love * that every _enter_* function corresponds to a state change. They generally 7442e9a92fSRobert Love * change the lports state and then send a request out on the wire. We lock 7542e9a92fSRobert Love * before calling any of these functions to protect that state change. This 7642e9a92fSRobert Love * means that the entry points into the lport block manage the locks while 7742e9a92fSRobert Love * the state machine can transition between states (i.e. _enter_* functions) 7842e9a92fSRobert Love * while always staying protected. 7942e9a92fSRobert Love * 8042e9a92fSRobert Love * When handling responses we also hold the lport mutex broadly. When the 8142e9a92fSRobert Love * lport receives the response frame it locks the mutex and then calls the 8242e9a92fSRobert Love * appropriate handler for the particuar response. Generally a response will 8342e9a92fSRobert Love * trigger a state change and so the lock must already be held. 8442e9a92fSRobert Love * 8542e9a92fSRobert Love * Retries also have to consider the locking. The retries occur from a work 8642e9a92fSRobert Love * context and the work function will lock the lport and then retry the state 8742e9a92fSRobert Love * (i.e. _enter_* function). 8842e9a92fSRobert Love */ 8942e9a92fSRobert Love 9042e9a92fSRobert Love #include <linux/timer.h> 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 16625985edcSLucas De Marchi * @event: The event that occurred 16742e9a92fSRobert Love * 16842e9a92fSRobert Love * Locking Note: The rport lock should not be held when calling 16942e9a92fSRobert Love * this function. 17042e9a92fSRobert Love */ 17142e9a92fSRobert Love static void fc_lport_rport_callback(struct fc_lport *lport, 1729fb9d328SJoe Eykholt struct fc_rport_priv *rdata, 17342e9a92fSRobert Love enum fc_rport_event event) 17442e9a92fSRobert Love { 175ce8b5df0SChris Leech FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event, 176f211fa51SJoe Eykholt rdata->ids.port_id); 17742e9a92fSRobert Love 178b5cbf083SJoe Eykholt mutex_lock(&lport->lp_mutex); 17942e9a92fSRobert Love switch (event) { 1804c0f62b5SJoe Eykholt case RPORT_EV_READY: 18142e9a92fSRobert Love if (lport->state == LPORT_ST_DNS) { 1823a3b42bfSRobert Love lport->dns_rdata = rdata; 183c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); 18442e9a92fSRobert Love } else { 1854c0f62b5SJoe Eykholt FC_LPORT_DBG(lport, "Received an READY event " 186ce8b5df0SChris Leech "on port (%6.6x) for the directory " 18742e9a92fSRobert Love "server, but the lport is not " 18842e9a92fSRobert Love "in the DNS state, it's in the " 189f211fa51SJoe Eykholt "%d state", rdata->ids.port_id, 19042e9a92fSRobert Love lport->state); 1919fb9d328SJoe Eykholt lport->tt.rport_logoff(rdata); 19242e9a92fSRobert Love } 19342e9a92fSRobert Love break; 19442e9a92fSRobert Love case RPORT_EV_LOGO: 19542e9a92fSRobert Love case RPORT_EV_FAILED: 19642e9a92fSRobert Love case RPORT_EV_STOP: 1973a3b42bfSRobert Love lport->dns_rdata = NULL; 19842e9a92fSRobert Love break; 19942e9a92fSRobert Love case RPORT_EV_NONE: 20042e9a92fSRobert Love break; 20142e9a92fSRobert Love } 202b5cbf083SJoe Eykholt mutex_unlock(&lport->lp_mutex); 20342e9a92fSRobert Love } 20442e9a92fSRobert Love 20542e9a92fSRobert Love /** 20634f42a07SRobert Love * fc_lport_state() - Return a string which represents the lport's state 20742e9a92fSRobert Love * @lport: The lport whose state is to converted to a string 20842e9a92fSRobert Love */ 20942e9a92fSRobert Love static const char *fc_lport_state(struct fc_lport *lport) 21042e9a92fSRobert Love { 21142e9a92fSRobert Love const char *cp; 21242e9a92fSRobert Love 21342e9a92fSRobert Love cp = fc_lport_state_names[lport->state]; 21442e9a92fSRobert Love if (!cp) 21542e9a92fSRobert Love cp = "unknown"; 21642e9a92fSRobert Love return cp; 21742e9a92fSRobert Love } 21842e9a92fSRobert Love 21942e9a92fSRobert Love /** 22034f42a07SRobert Love * fc_lport_ptp_setup() - Create an rport for point-to-point mode 22142e9a92fSRobert Love * @lport: The lport to attach the ptp rport to 2223a3b42bfSRobert Love * @remote_fid: The FID of the ptp rport 22342e9a92fSRobert Love * @remote_wwpn: The WWPN of the ptp rport 22442e9a92fSRobert Love * @remote_wwnn: The WWNN of the ptp rport 22542e9a92fSRobert Love */ 22642e9a92fSRobert Love static void fc_lport_ptp_setup(struct fc_lport *lport, 22742e9a92fSRobert Love u32 remote_fid, u64 remote_wwpn, 22842e9a92fSRobert Love u64 remote_wwnn) 22942e9a92fSRobert Love { 23048f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 2312f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 2323a3b42bfSRobert Love lport->tt.rport_logoff(lport->ptp_rdata); 2332f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 2342f2ac4a0SJoe Eykholt } 2353a3b42bfSRobert Love lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid); 2362f2ac4a0SJoe Eykholt kref_get(&lport->ptp_rdata->kref); 2373a3b42bfSRobert Love lport->ptp_rdata->ids.port_name = remote_wwpn; 2383a3b42bfSRobert Love lport->ptp_rdata->ids.node_name = remote_wwnn; 23948f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 24042e9a92fSRobert Love 2413a3b42bfSRobert Love lport->tt.rport_login(lport->ptp_rdata); 24242e9a92fSRobert Love 24342e9a92fSRobert Love fc_lport_enter_ready(lport); 24442e9a92fSRobert Love } 24542e9a92fSRobert Love 2463a3b42bfSRobert Love /** 2473a3b42bfSRobert Love * fc_get_host_port_state() - Return the port state of the given Scsi_Host 2483a3b42bfSRobert Love * @shost: The SCSI host whose port state is to be determined 2493a3b42bfSRobert Love */ 25042e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost) 25142e9a92fSRobert Love { 2523a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 25342e9a92fSRobert Love 2543a3b42bfSRobert Love mutex_lock(&lport->lp_mutex); 2553a3b42bfSRobert Love if (!lport->link_up) 2568faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 25742e9a92fSRobert Love else 2583a3b42bfSRobert Love switch (lport->state) { 2598faecddbSChris Leech case LPORT_ST_READY: 2608faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 2618faecddbSChris Leech break; 2628faecddbSChris Leech default: 26342e9a92fSRobert Love fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 26442e9a92fSRobert Love } 2653a3b42bfSRobert Love mutex_unlock(&lport->lp_mutex); 2668faecddbSChris Leech } 26742e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_state); 26842e9a92fSRobert Love 2693a3b42bfSRobert Love /** 2703a3b42bfSRobert Love * fc_get_host_speed() - Return the speed of the given Scsi_Host 2713a3b42bfSRobert Love * @shost: The SCSI host whose port speed is to be determined 2723a3b42bfSRobert Love */ 27342e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost) 27442e9a92fSRobert Love { 27542e9a92fSRobert Love struct fc_lport *lport = shost_priv(shost); 27642e9a92fSRobert Love 27742e9a92fSRobert Love fc_host_speed(shost) = lport->link_speed; 27842e9a92fSRobert Love } 27942e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_speed); 28042e9a92fSRobert Love 2813a3b42bfSRobert Love /** 2823a3b42bfSRobert Love * fc_get_host_stats() - Return the Scsi_Host's statistics 2833a3b42bfSRobert Love * @shost: The SCSI host whose statistics are to be returned 2843a3b42bfSRobert Love */ 28542e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) 28642e9a92fSRobert Love { 28742e9a92fSRobert Love struct fc_host_statistics *fcoe_stats; 2883a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 28942e9a92fSRobert Love struct timespec v0, v1; 290582b45bcSRobert Love unsigned int cpu; 2915f0e385fSJoe Eykholt u64 fcp_in_bytes = 0; 2925f0e385fSJoe Eykholt u64 fcp_out_bytes = 0; 29342e9a92fSRobert Love 2943a3b42bfSRobert Love fcoe_stats = &lport->host_stats; 29542e9a92fSRobert Love memset(fcoe_stats, 0, sizeof(struct fc_host_statistics)); 29642e9a92fSRobert Love 29742e9a92fSRobert Love jiffies_to_timespec(jiffies, &v0); 2983a3b42bfSRobert Love jiffies_to_timespec(lport->boot_time, &v1); 29942e9a92fSRobert Love fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec); 30042e9a92fSRobert Love 301582b45bcSRobert Love for_each_possible_cpu(cpu) { 302582b45bcSRobert Love struct fcoe_dev_stats *stats; 303582b45bcSRobert Love 3043a3b42bfSRobert Love stats = per_cpu_ptr(lport->dev_stats, cpu); 305582b45bcSRobert Love 30642e9a92fSRobert Love fcoe_stats->tx_frames += stats->TxFrames; 30742e9a92fSRobert Love fcoe_stats->tx_words += stats->TxWords; 30842e9a92fSRobert Love fcoe_stats->rx_frames += stats->RxFrames; 30942e9a92fSRobert Love fcoe_stats->rx_words += stats->RxWords; 31042e9a92fSRobert Love fcoe_stats->error_frames += stats->ErrorFrames; 31142e9a92fSRobert Love fcoe_stats->invalid_crc_count += stats->InvalidCRCCount; 31242e9a92fSRobert Love fcoe_stats->fcp_input_requests += stats->InputRequests; 31342e9a92fSRobert Love fcoe_stats->fcp_output_requests += stats->OutputRequests; 31442e9a92fSRobert Love fcoe_stats->fcp_control_requests += stats->ControlRequests; 3155f0e385fSJoe Eykholt fcp_in_bytes += stats->InputBytes; 3165f0e385fSJoe Eykholt fcp_out_bytes += stats->OutputBytes; 31742e9a92fSRobert Love fcoe_stats->link_failure_count += stats->LinkFailureCount; 31842e9a92fSRobert Love } 3195f0e385fSJoe Eykholt fcoe_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000); 3205f0e385fSJoe Eykholt fcoe_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000); 32142e9a92fSRobert Love fcoe_stats->lip_count = -1; 32242e9a92fSRobert Love fcoe_stats->nos_count = -1; 32342e9a92fSRobert Love fcoe_stats->loss_of_sync_count = -1; 32442e9a92fSRobert Love fcoe_stats->loss_of_signal_count = -1; 32542e9a92fSRobert Love fcoe_stats->prim_seq_protocol_err_count = -1; 32642e9a92fSRobert Love fcoe_stats->dumped_frames = -1; 32742e9a92fSRobert Love return fcoe_stats; 32842e9a92fSRobert Love } 32942e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_stats); 33042e9a92fSRobert Love 3313a3b42bfSRobert Love /** 3323a3b42bfSRobert Love * fc_lport_flogi_fill() - Fill in FLOGI command for request 3333a3b42bfSRobert Love * @lport: The local port the FLOGI is for 3343a3b42bfSRobert Love * @flogi: The FLOGI command 3353a3b42bfSRobert Love * @op: The opcode 33642e9a92fSRobert Love */ 3373a3b42bfSRobert Love static void fc_lport_flogi_fill(struct fc_lport *lport, 3383a3b42bfSRobert Love struct fc_els_flogi *flogi, 33942e9a92fSRobert Love unsigned int op) 34042e9a92fSRobert Love { 34142e9a92fSRobert Love struct fc_els_csp *sp; 34242e9a92fSRobert Love struct fc_els_cssp *cp; 34342e9a92fSRobert Love 34442e9a92fSRobert Love memset(flogi, 0, sizeof(*flogi)); 34542e9a92fSRobert Love flogi->fl_cmd = (u8) op; 34642e9a92fSRobert Love put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); 34742e9a92fSRobert Love put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); 34842e9a92fSRobert Love sp = &flogi->fl_csp; 34942e9a92fSRobert Love sp->sp_hi_ver = 0x20; 35042e9a92fSRobert Love sp->sp_lo_ver = 0x20; 35142e9a92fSRobert Love sp->sp_bb_cred = htons(10); /* this gets set by gateway */ 35242e9a92fSRobert Love sp->sp_bb_data = htons((u16) lport->mfs); 35342e9a92fSRobert Love cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ 35442e9a92fSRobert Love cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); 35542e9a92fSRobert Love if (op != ELS_FLOGI) { 35642e9a92fSRobert Love sp->sp_features = htons(FC_SP_FT_CIRO); 35742e9a92fSRobert Love sp->sp_tot_seq = htons(255); /* seq. we accept */ 35842e9a92fSRobert Love sp->sp_rel_off = htons(0x1f); 35942e9a92fSRobert Love sp->sp_e_d_tov = htonl(lport->e_d_tov); 36042e9a92fSRobert Love 36142e9a92fSRobert Love cp->cp_rdfs = htons((u16) lport->mfs); 36242e9a92fSRobert Love cp->cp_con_seq = htons(255); 36342e9a92fSRobert Love cp->cp_open_seq = 1; 36442e9a92fSRobert Love } 36542e9a92fSRobert Love } 36642e9a92fSRobert Love 3673a3b42bfSRobert Love /** 3683a3b42bfSRobert Love * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port 3693a3b42bfSRobert Love * @lport: The local port to add a new FC-4 type to 3703a3b42bfSRobert Love * @type: The new FC-4 type 37142e9a92fSRobert Love */ 37242e9a92fSRobert Love static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) 37342e9a92fSRobert Love { 37442e9a92fSRobert Love __be32 *mp; 37542e9a92fSRobert Love 37642e9a92fSRobert Love mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; 37742e9a92fSRobert Love *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); 37842e9a92fSRobert Love } 37942e9a92fSRobert Love 38042e9a92fSRobert Love /** 38134f42a07SRobert Love * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. 38225985edcSLucas De Marchi * @lport: Fibre Channel local port receiving the RLIR 38392261156SJoe Eykholt * @fp: The RLIR request frame 38442e9a92fSRobert Love * 3851b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 38642e9a92fSRobert Love * this function. 38742e9a92fSRobert Love */ 38892261156SJoe Eykholt static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp) 38942e9a92fSRobert Love { 3907414705eSRobert Love FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", 39142e9a92fSRobert Love fc_lport_state(lport)); 39242e9a92fSRobert Love 39392261156SJoe Eykholt lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); 39442e9a92fSRobert Love fc_frame_free(fp); 39542e9a92fSRobert Love } 39642e9a92fSRobert Love 39742e9a92fSRobert Love /** 39834f42a07SRobert Love * fc_lport_recv_echo_req() - Handle received ECHO request 39925985edcSLucas De Marchi * @lport: The local port receiving the ECHO 40092261156SJoe Eykholt * @fp: ECHO request frame 40142e9a92fSRobert Love * 4021b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 40342e9a92fSRobert Love * this function. 40442e9a92fSRobert Love */ 40592261156SJoe Eykholt static void fc_lport_recv_echo_req(struct fc_lport *lport, 40692261156SJoe Eykholt struct fc_frame *in_fp) 40742e9a92fSRobert Love { 40842e9a92fSRobert Love struct fc_frame *fp; 40942e9a92fSRobert Love unsigned int len; 41042e9a92fSRobert Love void *pp; 41142e9a92fSRobert Love void *dp; 41242e9a92fSRobert Love 4131b69bc06SJoe Eykholt FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", 41442e9a92fSRobert Love fc_lport_state(lport)); 41542e9a92fSRobert Love 41642e9a92fSRobert Love len = fr_len(in_fp) - sizeof(struct fc_frame_header); 41742e9a92fSRobert Love pp = fc_frame_payload_get(in_fp, len); 41842e9a92fSRobert Love 41942e9a92fSRobert Love if (len < sizeof(__be32)) 42042e9a92fSRobert Love len = sizeof(__be32); 42142e9a92fSRobert Love 42242e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 42342e9a92fSRobert Love if (fp) { 42442e9a92fSRobert Love dp = fc_frame_payload_get(fp, len); 42542e9a92fSRobert Love memcpy(dp, pp, len); 4261b69bc06SJoe Eykholt *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); 42724f089e2SJoe Eykholt fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); 42824f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 42942e9a92fSRobert Love } 43042e9a92fSRobert Love fc_frame_free(in_fp); 43142e9a92fSRobert Love } 43242e9a92fSRobert Love 43342e9a92fSRobert Love /** 4341b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 43525985edcSLucas De Marchi * @lport: The local port receiving the RNID 43692261156SJoe Eykholt * @fp: The RNID request frame 43742e9a92fSRobert Love * 4381b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 43942e9a92fSRobert Love * this function. 44042e9a92fSRobert Love */ 44192261156SJoe Eykholt static void fc_lport_recv_rnid_req(struct fc_lport *lport, 44292261156SJoe Eykholt struct fc_frame *in_fp) 44342e9a92fSRobert Love { 44442e9a92fSRobert Love struct fc_frame *fp; 44542e9a92fSRobert Love struct fc_els_rnid *req; 44642e9a92fSRobert Love struct { 44742e9a92fSRobert Love struct fc_els_rnid_resp rnid; 44842e9a92fSRobert Love struct fc_els_rnid_cid cid; 44942e9a92fSRobert Love struct fc_els_rnid_gen gen; 45042e9a92fSRobert Love } *rp; 45142e9a92fSRobert Love struct fc_seq_els_data rjt_data; 45242e9a92fSRobert Love u8 fmt; 45342e9a92fSRobert Love size_t len; 45442e9a92fSRobert Love 4557414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 45642e9a92fSRobert Love fc_lport_state(lport)); 45742e9a92fSRobert Love 45842e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 45942e9a92fSRobert Love if (!req) { 46042e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 46142e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 46292261156SJoe Eykholt lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); 46342e9a92fSRobert Love } else { 46442e9a92fSRobert Love fmt = req->rnid_fmt; 46542e9a92fSRobert Love len = sizeof(*rp); 46642e9a92fSRobert Love if (fmt != ELS_RNIDF_GEN || 46742e9a92fSRobert Love ntohl(lport->rnid_gen.rnid_atype) == 0) { 46842e9a92fSRobert Love fmt = ELS_RNIDF_NONE; /* nothing to provide */ 46942e9a92fSRobert Love len -= sizeof(rp->gen); 47042e9a92fSRobert Love } 47142e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 47242e9a92fSRobert Love if (fp) { 47342e9a92fSRobert Love rp = fc_frame_payload_get(fp, len); 47442e9a92fSRobert Love memset(rp, 0, len); 47542e9a92fSRobert Love rp->rnid.rnid_cmd = ELS_LS_ACC; 47642e9a92fSRobert Love rp->rnid.rnid_fmt = fmt; 47742e9a92fSRobert Love rp->rnid.rnid_cid_len = sizeof(rp->cid); 47842e9a92fSRobert Love rp->cid.rnid_wwpn = htonll(lport->wwpn); 47942e9a92fSRobert Love rp->cid.rnid_wwnn = htonll(lport->wwnn); 48042e9a92fSRobert Love if (fmt == ELS_RNIDF_GEN) { 48142e9a92fSRobert Love rp->rnid.rnid_sid_len = sizeof(rp->gen); 48242e9a92fSRobert Love memcpy(&rp->gen, &lport->rnid_gen, 48342e9a92fSRobert Love sizeof(rp->gen)); 48442e9a92fSRobert Love } 48524f089e2SJoe Eykholt fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); 48624f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 48742e9a92fSRobert Love } 48842e9a92fSRobert Love } 48942e9a92fSRobert Love fc_frame_free(in_fp); 49042e9a92fSRobert Love } 49142e9a92fSRobert Love 49242e9a92fSRobert Love /** 49334f42a07SRobert Love * fc_lport_recv_logo_req() - Handle received fabric LOGO request 49425985edcSLucas De Marchi * @lport: The local port receiving the LOGO 49592261156SJoe Eykholt * @fp: The LOGO request frame 49642e9a92fSRobert Love * 49742e9a92fSRobert Love * Locking Note: The lport lock is exected to be held before calling 49842e9a92fSRobert Love * this function. 49942e9a92fSRobert Love */ 50092261156SJoe Eykholt static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) 50142e9a92fSRobert Love { 50292261156SJoe Eykholt lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL); 50342e9a92fSRobert Love fc_lport_enter_reset(lport); 50442e9a92fSRobert Love fc_frame_free(fp); 50542e9a92fSRobert Love } 50642e9a92fSRobert Love 50742e9a92fSRobert Love /** 50834f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 5093a3b42bfSRobert Love * @lport: The local port that should log into the fabric 51042e9a92fSRobert Love * 51142e9a92fSRobert Love * Locking Note: This function should not be called 51242e9a92fSRobert Love * with the lport lock held. 51342e9a92fSRobert Love */ 51442e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 51542e9a92fSRobert Love { 51642e9a92fSRobert Love int rc = -1; 51742e9a92fSRobert Love 51842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 51955a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || 52055a66d3cSVasu Dev lport->state == LPORT_ST_LOGO) { 52155a66d3cSVasu Dev fc_lport_state_enter(lport, LPORT_ST_RESET); 52242e9a92fSRobert Love fc_lport_enter_reset(lport); 52342e9a92fSRobert Love rc = 0; 52442e9a92fSRobert Love } 52542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 52642e9a92fSRobert Love 52742e9a92fSRobert Love return rc; 52842e9a92fSRobert Love } 52942e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 53042e9a92fSRobert Love 53142e9a92fSRobert Love /** 5328faecddbSChris Leech * __fc_linkup() - Handler for transport linkup events 5338faecddbSChris Leech * @lport: The lport whose link is up 5348faecddbSChris Leech * 5358faecddbSChris Leech * Locking: must be called with the lp_mutex held 5368faecddbSChris Leech */ 5378faecddbSChris Leech void __fc_linkup(struct fc_lport *lport) 5388faecddbSChris Leech { 5398faecddbSChris Leech if (!lport->link_up) { 5408faecddbSChris Leech lport->link_up = 1; 5418faecddbSChris Leech 5428faecddbSChris Leech if (lport->state == LPORT_ST_RESET) 5438faecddbSChris Leech fc_lport_enter_flogi(lport); 5448faecddbSChris Leech } 5458faecddbSChris Leech } 5468faecddbSChris Leech 5478faecddbSChris Leech /** 54834f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 5493a3b42bfSRobert Love * @lport: The local port whose link is up 55042e9a92fSRobert Love */ 55142e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 55242e9a92fSRobert Love { 553ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", 5547b2787ecSRobert Love lport->host->host_no, lport->port_id); 55542e9a92fSRobert Love 55642e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5578faecddbSChris Leech __fc_linkup(lport); 55842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 55942e9a92fSRobert Love } 56042e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 56142e9a92fSRobert Love 56242e9a92fSRobert Love /** 5638faecddbSChris Leech * __fc_linkdown() - Handler for transport linkdown events 5648faecddbSChris Leech * @lport: The lport whose link is down 5658faecddbSChris Leech * 5668faecddbSChris Leech * Locking: must be called with the lp_mutex held 5678faecddbSChris Leech */ 5688faecddbSChris Leech void __fc_linkdown(struct fc_lport *lport) 5698faecddbSChris Leech { 5708faecddbSChris Leech if (lport->link_up) { 5718faecddbSChris Leech lport->link_up = 0; 5728faecddbSChris Leech fc_lport_enter_reset(lport); 5738faecddbSChris Leech lport->tt.fcp_cleanup(lport); 5748faecddbSChris Leech } 5758faecddbSChris Leech } 5768faecddbSChris Leech 5778faecddbSChris Leech /** 57834f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 5793a3b42bfSRobert Love * @lport: The local port whose link is down 58042e9a92fSRobert Love */ 58142e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 58242e9a92fSRobert Love { 583ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", 5847b2787ecSRobert Love lport->host->host_no, lport->port_id); 58542e9a92fSRobert Love 5868faecddbSChris Leech mutex_lock(&lport->lp_mutex); 5878faecddbSChris Leech __fc_linkdown(lport); 58842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 58942e9a92fSRobert Love } 59042e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 59142e9a92fSRobert Love 59242e9a92fSRobert Love /** 59334f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 5943a3b42bfSRobert Love * @lport: The local port to logoff the fabric 59542e9a92fSRobert Love * 59642e9a92fSRobert Love * Return value: 59742e9a92fSRobert Love * 0 for success, -1 for failure 59834f42a07SRobert Love */ 59942e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 60042e9a92fSRobert Love { 60142e9a92fSRobert Love lport->tt.disc_stop_final(lport); 60242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 6033a3b42bfSRobert Love if (lport->dns_rdata) 6043a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 605a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 606a0fd2e49SAbhijeet Joglekar lport->tt.rport_flush_queue(); 607a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 60842e9a92fSRobert Love fc_lport_enter_logo(lport); 60942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 610f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 61142e9a92fSRobert Love return 0; 61242e9a92fSRobert Love } 61342e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 61442e9a92fSRobert Love 61542e9a92fSRobert Love /** 6163a3b42bfSRobert Love * fc_lport_destroy() - Unregister a fc_lport 6173a3b42bfSRobert Love * @lport: The local port to unregister 61842e9a92fSRobert Love * 61942e9a92fSRobert Love * Note: 62042e9a92fSRobert Love * exit routine for fc_lport instance 62142e9a92fSRobert Love * clean-up all the allocated memory 62242e9a92fSRobert Love * and free up other system resources. 62342e9a92fSRobert Love * 62434f42a07SRobert Love */ 62542e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 62642e9a92fSRobert Love { 627bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 628b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 629bbf15669SAbhijeet Joglekar lport->link_up = 0; 63042e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 631bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 632bbf15669SAbhijeet Joglekar 63342e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 634e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 6351f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 63670d53b04SJoe Eykholt fc_fc4_del_lport(lport); 63742e9a92fSRobert Love return 0; 63842e9a92fSRobert Love } 63942e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 64042e9a92fSRobert Love 64142e9a92fSRobert Love /** 6423a3b42bfSRobert Love * fc_set_mfs() - Set the maximum frame size for a local port 6433a3b42bfSRobert Love * @lport: The local port to set the MFS for 6443a3b42bfSRobert Love * @mfs: The new MFS 64534f42a07SRobert Love */ 64642e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 64742e9a92fSRobert Love { 64842e9a92fSRobert Love unsigned int old_mfs; 64942e9a92fSRobert Love int rc = -EINVAL; 65042e9a92fSRobert Love 65142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 65242e9a92fSRobert Love 65342e9a92fSRobert Love old_mfs = lport->mfs; 65442e9a92fSRobert Love 65542e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 65642e9a92fSRobert Love mfs &= ~3; 65742e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 65842e9a92fSRobert Love mfs = FC_MAX_FRAME; 65942e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 66042e9a92fSRobert Love lport->mfs = mfs; 66142e9a92fSRobert Love rc = 0; 66242e9a92fSRobert Love } 66342e9a92fSRobert Love 66442e9a92fSRobert Love if (!rc && mfs < old_mfs) 66542e9a92fSRobert Love fc_lport_enter_reset(lport); 66642e9a92fSRobert Love 66742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 66842e9a92fSRobert Love 66942e9a92fSRobert Love return rc; 67042e9a92fSRobert Love } 67142e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 67242e9a92fSRobert Love 67342e9a92fSRobert Love /** 67434f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 6753a3b42bfSRobert Love * @lport: The local port receiving the event 67642e9a92fSRobert Love * @event: The discovery event 67742e9a92fSRobert Love */ 67842e9a92fSRobert Love void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event) 67942e9a92fSRobert Love { 68042e9a92fSRobert Love switch (event) { 68142e9a92fSRobert Love case DISC_EV_SUCCESS: 6827414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 68342e9a92fSRobert Love break; 68442e9a92fSRobert Love case DISC_EV_FAILED: 685e6d8a1b0SJoe Eykholt printk(KERN_ERR "host%d: libfc: " 686ce8b5df0SChris Leech "Discovery failed for port (%6.6x)\n", 6877b2787ecSRobert Love lport->host->host_no, lport->port_id); 68842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 68942e9a92fSRobert Love fc_lport_enter_reset(lport); 69042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 69142e9a92fSRobert Love break; 69242e9a92fSRobert Love case DISC_EV_NONE: 69342e9a92fSRobert Love WARN_ON(1); 69442e9a92fSRobert Love break; 69542e9a92fSRobert Love } 69642e9a92fSRobert Love } 69742e9a92fSRobert Love 69842e9a92fSRobert Love /** 69934f42a07SRobert Love * fc_rport_enter_ready() - Enter the ready state and start discovery 7003a3b42bfSRobert Love * @lport: The local port that is ready 70142e9a92fSRobert Love * 70242e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 70342e9a92fSRobert Love * this routine. 70442e9a92fSRobert Love */ 70542e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 70642e9a92fSRobert Love { 7077414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 7087414705eSRobert Love fc_lport_state(lport)); 70942e9a92fSRobert Love 71042e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 7118faecddbSChris Leech if (lport->vport) 7128faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); 7138faecddbSChris Leech fc_vports_linkchange(lport); 71442e9a92fSRobert Love 7153a3b42bfSRobert Love if (!lport->ptp_rdata) 71642e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 71742e9a92fSRobert Love } 71842e9a92fSRobert Love 71942e9a92fSRobert Love /** 720093bb6a2SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID 721093bb6a2SJoe Eykholt * @lport: The local port which will have its Port ID set. 722093bb6a2SJoe Eykholt * @port_id: The new port ID. 723093bb6a2SJoe Eykholt * @fp: The frame containing the incoming request, or NULL. 724093bb6a2SJoe Eykholt * 725093bb6a2SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 726093bb6a2SJoe Eykholt * this function. 727093bb6a2SJoe Eykholt */ 728093bb6a2SJoe Eykholt static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, 729093bb6a2SJoe Eykholt struct fc_frame *fp) 730093bb6a2SJoe Eykholt { 731093bb6a2SJoe Eykholt if (port_id) 732ce8b5df0SChris Leech printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", 733093bb6a2SJoe Eykholt lport->host->host_no, port_id); 734093bb6a2SJoe Eykholt 7357b2787ecSRobert Love lport->port_id = port_id; 7367b2787ecSRobert Love 7377b2787ecSRobert Love /* Update the fc_host */ 738093bb6a2SJoe Eykholt fc_host_port_id(lport->host) = port_id; 7397b2787ecSRobert Love 740093bb6a2SJoe Eykholt if (lport->tt.lport_set_port_id) 741093bb6a2SJoe Eykholt lport->tt.lport_set_port_id(lport, port_id, fp); 742093bb6a2SJoe Eykholt } 743093bb6a2SJoe Eykholt 744093bb6a2SJoe Eykholt /** 7453726f358SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint 7463726f358SJoe Eykholt * @lport: The local port which will have its Port ID set. 7473726f358SJoe Eykholt * @port_id: The new port ID. 7483726f358SJoe Eykholt * 7493726f358SJoe Eykholt * Called by the lower-level driver when transport sets the local port_id. 7503726f358SJoe Eykholt * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and 7513726f358SJoe Eykholt * discovery to be skipped. 7523726f358SJoe Eykholt */ 7533726f358SJoe Eykholt void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id) 7543726f358SJoe Eykholt { 7553726f358SJoe Eykholt mutex_lock(&lport->lp_mutex); 7563726f358SJoe Eykholt 7573726f358SJoe Eykholt fc_lport_set_port_id(lport, port_id, NULL); 7583726f358SJoe Eykholt 7593726f358SJoe Eykholt switch (lport->state) { 7603726f358SJoe Eykholt case LPORT_ST_RESET: 7613726f358SJoe Eykholt case LPORT_ST_FLOGI: 7623726f358SJoe Eykholt if (port_id) 7633726f358SJoe Eykholt fc_lport_enter_ready(lport); 7643726f358SJoe Eykholt break; 7653726f358SJoe Eykholt default: 7663726f358SJoe Eykholt break; 7673726f358SJoe Eykholt } 7683726f358SJoe Eykholt mutex_unlock(&lport->lp_mutex); 7693726f358SJoe Eykholt } 7703726f358SJoe Eykholt EXPORT_SYMBOL(fc_lport_set_local_id); 7713726f358SJoe Eykholt 7723726f358SJoe Eykholt /** 77334f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 77425985edcSLucas De Marchi * @lport: The local port that received the request 77592261156SJoe Eykholt * @rx_fp: The FLOGI frame 77642e9a92fSRobert Love * 77742e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 77842e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 77942e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 78042e9a92fSRobert Love * 7811b69bc06SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 78242e9a92fSRobert Love * this function. 78342e9a92fSRobert Love */ 78492261156SJoe Eykholt static void fc_lport_recv_flogi_req(struct fc_lport *lport, 78592261156SJoe Eykholt struct fc_frame *rx_fp) 78642e9a92fSRobert Love { 78742e9a92fSRobert Love struct fc_frame *fp; 78824f089e2SJoe Eykholt struct fc_frame_header *fh; 78942e9a92fSRobert Love struct fc_els_flogi *flp; 79042e9a92fSRobert Love struct fc_els_flogi *new_flp; 79142e9a92fSRobert Love u64 remote_wwpn; 79242e9a92fSRobert Love u32 remote_fid; 79342e9a92fSRobert Love u32 local_fid; 79442e9a92fSRobert Love 7957414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 79642e9a92fSRobert Love fc_lport_state(lport)); 79742e9a92fSRobert Love 798251748a9SJoe Eykholt remote_fid = fc_frame_sid(rx_fp); 79942e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 80042e9a92fSRobert Love if (!flp) 80142e9a92fSRobert Love goto out; 80242e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 80342e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 804e6d8a1b0SJoe Eykholt printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " 8059f8f3aa6SChris Leech "with same WWPN %16.16llx\n", 806e6d8a1b0SJoe Eykholt lport->host->host_no, remote_wwpn); 80742e9a92fSRobert Love goto out; 80842e9a92fSRobert Love } 8099f8f3aa6SChris Leech FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); 81042e9a92fSRobert Love 81142e9a92fSRobert Love /* 81242e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 81342e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 81442e9a92fSRobert Love * But if so, both of us could end up with the same FID. 81542e9a92fSRobert Love */ 81642e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 81742e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 81842e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 81942e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 82042e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 82142e9a92fSRobert Love } else if (!remote_fid) { 82242e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 82342e9a92fSRobert Love } 82442e9a92fSRobert Love 825093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, local_fid, rx_fp); 82642e9a92fSRobert Love 82742e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 82842e9a92fSRobert Love if (fp) { 82942e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 83042e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 83142e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 83242e9a92fSRobert Love 83342e9a92fSRobert Love /* 83442e9a92fSRobert Love * Send the response. If this fails, the originator should 83542e9a92fSRobert Love * repeat the sequence. 83642e9a92fSRobert Love */ 83724f089e2SJoe Eykholt fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); 83824f089e2SJoe Eykholt fh = fc_frame_header_get(fp); 83924f089e2SJoe Eykholt hton24(fh->fh_s_id, local_fid); 84024f089e2SJoe Eykholt hton24(fh->fh_d_id, remote_fid); 84124f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 84242e9a92fSRobert Love 84342e9a92fSRobert Love } else { 84442e9a92fSRobert Love fc_lport_error(lport, fp); 84542e9a92fSRobert Love } 84642e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 84742e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 84842e9a92fSRobert Love out: 84942e9a92fSRobert Love fc_frame_free(rx_fp); 85042e9a92fSRobert Love } 85142e9a92fSRobert Love 85242e9a92fSRobert Love /** 85396ad8464SJoe Eykholt * fc_lport_recv_els_req() - The generic lport ELS request handler 8543a3b42bfSRobert Love * @lport: The local port that received the request 8553a3b42bfSRobert Love * @fp: The request frame 85642e9a92fSRobert Love * 85742e9a92fSRobert Love * This function will see if the lport handles the request or 85842e9a92fSRobert Love * if an rport should handle the request. 85942e9a92fSRobert Love * 86042e9a92fSRobert Love * Locking Note: This function should not be called with the lport 86125985edcSLucas De Marchi * lock held because it will grab the lock. 86242e9a92fSRobert Love */ 86396ad8464SJoe Eykholt static void fc_lport_recv_els_req(struct fc_lport *lport, 86496ad8464SJoe Eykholt struct fc_frame *fp) 86542e9a92fSRobert Love { 86692261156SJoe Eykholt void (*recv)(struct fc_lport *, struct fc_frame *); 86742e9a92fSRobert Love 86842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 86942e9a92fSRobert Love 87042e9a92fSRobert Love /* 87142e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 87242e9a92fSRobert Love * RSCN here. These don't require a session. 87342e9a92fSRobert Love * Even if we had a session, it might not be ready. 87442e9a92fSRobert Love */ 875e9ba8b42SJoe Eykholt if (!lport->link_up) 876e9ba8b42SJoe Eykholt fc_frame_free(fp); 87796ad8464SJoe Eykholt else { 87842e9a92fSRobert Love /* 87942e9a92fSRobert Love * Check opcode. 88042e9a92fSRobert Love */ 881131203a1SJoe Eykholt recv = lport->tt.rport_recv_req; 88242e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 88342e9a92fSRobert Love case ELS_FLOGI: 884a7b12a27SJoe Eykholt if (!lport->point_to_multipoint) 88542e9a92fSRobert Love recv = fc_lport_recv_flogi_req; 88642e9a92fSRobert Love break; 88742e9a92fSRobert Love case ELS_LOGO: 888251748a9SJoe Eykholt if (fc_frame_sid(fp) == FC_FID_FLOGI) 88942e9a92fSRobert Love recv = fc_lport_recv_logo_req; 89042e9a92fSRobert Love break; 89142e9a92fSRobert Love case ELS_RSCN: 89242e9a92fSRobert Love recv = lport->tt.disc_recv_req; 89342e9a92fSRobert Love break; 89442e9a92fSRobert Love case ELS_ECHO: 89542e9a92fSRobert Love recv = fc_lport_recv_echo_req; 89642e9a92fSRobert Love break; 89742e9a92fSRobert Love case ELS_RLIR: 89842e9a92fSRobert Love recv = fc_lport_recv_rlir_req; 89942e9a92fSRobert Love break; 90042e9a92fSRobert Love case ELS_RNID: 90142e9a92fSRobert Love recv = fc_lport_recv_rnid_req; 90242e9a92fSRobert Love break; 90342e9a92fSRobert Love } 90442e9a92fSRobert Love 90592261156SJoe Eykholt recv(lport, fp); 90642e9a92fSRobert Love } 90742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 90842e9a92fSRobert Love } 90942e9a92fSRobert Love 91096ad8464SJoe Eykholt static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len, 91196ad8464SJoe Eykholt const struct fc_els_spp *spp_in, 91296ad8464SJoe Eykholt struct fc_els_spp *spp_out) 91396ad8464SJoe Eykholt { 91496ad8464SJoe Eykholt return FC_SPP_RESP_INVL; 91596ad8464SJoe Eykholt } 91696ad8464SJoe Eykholt 91796ad8464SJoe Eykholt struct fc4_prov fc_lport_els_prov = { 91896ad8464SJoe Eykholt .prli = fc_lport_els_prli, 91996ad8464SJoe Eykholt .recv = fc_lport_recv_els_req, 92096ad8464SJoe Eykholt }; 92196ad8464SJoe Eykholt 92296ad8464SJoe Eykholt /** 92396ad8464SJoe Eykholt * fc_lport_recv_req() - The generic lport request handler 92496ad8464SJoe Eykholt * @lport: The lport that received the request 92596ad8464SJoe Eykholt * @fp: The frame the request is in 92696ad8464SJoe Eykholt * 92796ad8464SJoe Eykholt * Locking Note: This function should not be called with the lport 92825985edcSLucas De Marchi * lock held because it may grab the lock. 92996ad8464SJoe Eykholt */ 93096ad8464SJoe Eykholt static void fc_lport_recv_req(struct fc_lport *lport, 93196ad8464SJoe Eykholt struct fc_frame *fp) 93296ad8464SJoe Eykholt { 93396ad8464SJoe Eykholt struct fc_frame_header *fh = fc_frame_header_get(fp); 93496ad8464SJoe Eykholt struct fc_seq *sp = fr_seq(fp); 93596ad8464SJoe Eykholt struct fc4_prov *prov; 93696ad8464SJoe Eykholt 93796ad8464SJoe Eykholt /* 93896ad8464SJoe Eykholt * Use RCU read lock and module_lock to be sure module doesn't 93996ad8464SJoe Eykholt * deregister and get unloaded while we're calling it. 94096ad8464SJoe Eykholt * try_module_get() is inlined and accepts a NULL parameter. 94196ad8464SJoe Eykholt * Only ELSes and FCP target ops should come through here. 94296ad8464SJoe Eykholt * The locking is unfortunate, and a better scheme is being sought. 94396ad8464SJoe Eykholt */ 94496ad8464SJoe Eykholt 94596ad8464SJoe Eykholt rcu_read_lock(); 94696ad8464SJoe Eykholt if (fh->fh_type >= FC_FC4_PROV_SIZE) 94796ad8464SJoe Eykholt goto drop; 94896ad8464SJoe Eykholt prov = rcu_dereference(fc_passive_prov[fh->fh_type]); 94996ad8464SJoe Eykholt if (!prov || !try_module_get(prov->module)) 95096ad8464SJoe Eykholt goto drop; 95196ad8464SJoe Eykholt rcu_read_unlock(); 95296ad8464SJoe Eykholt prov->recv(lport, fp); 95396ad8464SJoe Eykholt module_put(prov->module); 95496ad8464SJoe Eykholt return; 95596ad8464SJoe Eykholt drop: 95696ad8464SJoe Eykholt rcu_read_unlock(); 95796ad8464SJoe Eykholt FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type); 95896ad8464SJoe Eykholt fc_frame_free(fp); 95996ad8464SJoe Eykholt lport->tt.exch_done(sp); 96096ad8464SJoe Eykholt } 96196ad8464SJoe Eykholt 96242e9a92fSRobert Love /** 9633a3b42bfSRobert Love * fc_lport_reset() - Reset a local port 9643a3b42bfSRobert Love * @lport: The local port which should be reset 96542e9a92fSRobert Love * 96642e9a92fSRobert Love * Locking Note: This functions should not be called with the 96742e9a92fSRobert Love * lport lock held. 96842e9a92fSRobert Love */ 96942e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 97042e9a92fSRobert Love { 971f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 97242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 97342e9a92fSRobert Love fc_lport_enter_reset(lport); 97442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 97542e9a92fSRobert Love return 0; 97642e9a92fSRobert Love } 97742e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 97842e9a92fSRobert Love 97942e9a92fSRobert Love /** 9803a3b42bfSRobert Love * fc_lport_reset_locked() - Reset the local port w/ the lport lock held 9813a3b42bfSRobert Love * @lport: The local port to be reset 98242e9a92fSRobert Love * 98342e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 98442e9a92fSRobert Love * this routine. 98542e9a92fSRobert Love */ 9861190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 98742e9a92fSRobert Love { 9883a3b42bfSRobert Love if (lport->dns_rdata) 9893a3b42bfSRobert Love lport->tt.rport_logoff(lport->dns_rdata); 99042e9a92fSRobert Love 9912f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 9922f2ac4a0SJoe Eykholt lport->tt.rport_logoff(lport->ptp_rdata); 9932f2ac4a0SJoe Eykholt kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); 9943a3b42bfSRobert Love lport->ptp_rdata = NULL; 9952f2ac4a0SJoe Eykholt } 99642e9a92fSRobert Love 99742e9a92fSRobert Love lport->tt.disc_stop(lport); 99842e9a92fSRobert Love 9991f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 100042e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 1001093bb6a2SJoe Eykholt 10023726f358SJoe Eykholt if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up)) 1003093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, 0, NULL); 10041190d925SJoe Eykholt } 100542e9a92fSRobert Love 10061190d925SJoe Eykholt /** 10071190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 10083a3b42bfSRobert Love * @lport: The local port to be reset 10091190d925SJoe Eykholt * 10101190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 10111190d925SJoe Eykholt * this routine. 10121190d925SJoe Eykholt */ 10131190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 10141190d925SJoe Eykholt { 10151190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 10161190d925SJoe Eykholt fc_lport_state(lport)); 10171190d925SJoe Eykholt 101855a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) 101955a66d3cSVasu Dev return; 102055a66d3cSVasu Dev 10218faecddbSChris Leech if (lport->vport) { 10228faecddbSChris Leech if (lport->link_up) 10238faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); 10248faecddbSChris Leech else 10258faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); 10268faecddbSChris Leech } 10271190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 10288faecddbSChris Leech fc_vports_linkchange(lport); 10291190d925SJoe Eykholt fc_lport_reset_locked(lport); 1030bc0e17f6SVasu Dev if (lport->link_up) 103142e9a92fSRobert Love fc_lport_enter_flogi(lport); 103242e9a92fSRobert Love } 103342e9a92fSRobert Love 103442e9a92fSRobert Love /** 10353a3b42bfSRobert Love * fc_lport_enter_disabled() - Disable the local port 10363a3b42bfSRobert Love * @lport: The local port to be reset 10371190d925SJoe Eykholt * 10381190d925SJoe Eykholt * Locking Note: The lport lock is expected to be held before calling 10391190d925SJoe Eykholt * this routine. 10401190d925SJoe Eykholt */ 10411190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 10421190d925SJoe Eykholt { 10431190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 10441190d925SJoe Eykholt fc_lport_state(lport)); 10451190d925SJoe Eykholt 10461190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 10478faecddbSChris Leech fc_vports_linkchange(lport); 10481190d925SJoe Eykholt fc_lport_reset_locked(lport); 10491190d925SJoe Eykholt } 10501190d925SJoe Eykholt 10511190d925SJoe Eykholt /** 105234f42a07SRobert Love * fc_lport_error() - Handler for any errors 10533a3b42bfSRobert Love * @lport: The local port that the error was on 10543a3b42bfSRobert Love * @fp: The error code encoded in a frame pointer 105542e9a92fSRobert Love * 105642e9a92fSRobert Love * If the error was caused by a resource allocation failure 105742e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 105842e9a92fSRobert Love * after the e_d_tov time. 105942e9a92fSRobert Love */ 106042e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 106142e9a92fSRobert Love { 106242e9a92fSRobert Love unsigned long delay = 0; 10637414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 106442e9a92fSRobert Love PTR_ERR(fp), fc_lport_state(lport), 106542e9a92fSRobert Love lport->retry_count); 106642e9a92fSRobert Love 10677f985231SBhanu Prakash Gollapudi if (PTR_ERR(fp) == -FC_EX_CLOSED) 10687f985231SBhanu Prakash Gollapudi return; 10697f985231SBhanu Prakash Gollapudi 107042e9a92fSRobert Love /* 10717f985231SBhanu Prakash Gollapudi * Memory allocation failure, or the exchange timed out 10727f985231SBhanu Prakash Gollapudi * or we received LS_RJT. 107342e9a92fSRobert Love * Retry after delay 107442e9a92fSRobert Love */ 107542e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 107642e9a92fSRobert Love lport->retry_count++; 107742e9a92fSRobert Love if (!fp) 107842e9a92fSRobert Love delay = msecs_to_jiffies(500); 107942e9a92fSRobert Love else 108042e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 108142e9a92fSRobert Love 108242e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 10837f985231SBhanu Prakash Gollapudi } else 108442e9a92fSRobert Love fc_lport_enter_reset(lport); 108542e9a92fSRobert Love } 108642e9a92fSRobert Love 108742e9a92fSRobert Love /** 10887cccc157SChris Leech * fc_lport_ns_resp() - Handle response to a name server 10897cccc157SChris Leech * registration exchange 10907cccc157SChris Leech * @sp: current sequence in exchange 109142e9a92fSRobert Love * @fp: response frame 109242e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 109342e9a92fSRobert Love * 109442e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 10953a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 109642e9a92fSRobert Love * and then unlock the lport. 109742e9a92fSRobert Love */ 10987cccc157SChris Leech static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, 109942e9a92fSRobert Love void *lp_arg) 110042e9a92fSRobert Love { 110142e9a92fSRobert Love struct fc_lport *lport = lp_arg; 110242e9a92fSRobert Love struct fc_frame_header *fh; 110342e9a92fSRobert Love struct fc_ct_hdr *ct; 110442e9a92fSRobert Love 11057cccc157SChris Leech FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); 1106f657d299SJoe Eykholt 110742e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 110842e9a92fSRobert Love return; 110942e9a92fSRobert Love 111042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 111142e9a92fSRobert Love 1112ab593b18SJoe Eykholt if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { 11137cccc157SChris Leech FC_LPORT_DBG(lport, "Received a name server response, " 11147cccc157SChris Leech "but in state %s\n", fc_lport_state(lport)); 111576f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 111676f6804eSAbhijeet Joglekar goto err; 111742e9a92fSRobert Love goto out; 111842e9a92fSRobert Love } 111942e9a92fSRobert Love 112076f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 112176f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 112276f6804eSAbhijeet Joglekar goto err; 112376f6804eSAbhijeet Joglekar } 112476f6804eSAbhijeet Joglekar 112542e9a92fSRobert Love fh = fc_frame_header_get(fp); 112642e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 112742e9a92fSRobert Love 112842e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 112942e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 113042e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 113142e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 11327cccc157SChris Leech switch (lport->state) { 11337cccc157SChris Leech case LPORT_ST_RNN_ID: 1134c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); 11357cccc157SChris Leech break; 11367cccc157SChris Leech case LPORT_ST_RSNN_NN: 1137c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); 11387cccc157SChris Leech break; 11397cccc157SChris Leech case LPORT_ST_RSPN_ID: 1140c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 11417cccc157SChris Leech break; 11427cccc157SChris Leech case LPORT_ST_RFT_ID: 1143ab593b18SJoe Eykholt fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); 1144ab593b18SJoe Eykholt break; 1145ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 11467cccc157SChris Leech fc_lport_enter_scr(lport); 11477cccc157SChris Leech break; 11487cccc157SChris Leech default: 11497cccc157SChris Leech /* should have already been caught by state checks */ 11507cccc157SChris Leech break; 11517cccc157SChris Leech } 1152c9c7bd7aSChris Leech else 1153c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1154c9c7bd7aSChris Leech out: 1155c9c7bd7aSChris Leech fc_frame_free(fp); 1156c9c7bd7aSChris Leech err: 1157c9c7bd7aSChris Leech mutex_unlock(&lport->lp_mutex); 1158c9c7bd7aSChris Leech } 1159c9c7bd7aSChris Leech 1160c9c7bd7aSChris Leech /** 116134f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 116242e9a92fSRobert Love * @sp: current sequence in SCR exchange 116342e9a92fSRobert Love * @fp: response frame 116442e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 116542e9a92fSRobert Love * 116642e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 116742e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 116842e9a92fSRobert Love * and then unlock the lport. 116942e9a92fSRobert Love */ 117042e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 117142e9a92fSRobert Love void *lp_arg) 117242e9a92fSRobert Love { 117342e9a92fSRobert Love struct fc_lport *lport = lp_arg; 117442e9a92fSRobert Love u8 op; 117542e9a92fSRobert Love 1176f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1177f657d299SJoe Eykholt 117842e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 117942e9a92fSRobert Love return; 118042e9a92fSRobert Love 118142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 118242e9a92fSRobert Love 118342e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 11847414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 11857414705eSRobert Love "%s\n", fc_lport_state(lport)); 118676f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 118776f6804eSAbhijeet Joglekar goto err; 118842e9a92fSRobert Love goto out; 118942e9a92fSRobert Love } 119042e9a92fSRobert Love 119176f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 119276f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 119376f6804eSAbhijeet Joglekar goto err; 119476f6804eSAbhijeet Joglekar } 119576f6804eSAbhijeet Joglekar 119642e9a92fSRobert Love op = fc_frame_payload_op(fp); 119742e9a92fSRobert Love if (op == ELS_LS_ACC) 119842e9a92fSRobert Love fc_lport_enter_ready(lport); 119942e9a92fSRobert Love else 120042e9a92fSRobert Love fc_lport_error(lport, fp); 120142e9a92fSRobert Love 120242e9a92fSRobert Love out: 120342e9a92fSRobert Love fc_frame_free(fp); 120442e9a92fSRobert Love err: 120542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 120642e9a92fSRobert Love } 120742e9a92fSRobert Love 120842e9a92fSRobert Love /** 12093a3b42bfSRobert Love * fc_lport_enter_scr() - Send a SCR (State Change Register) request 12103a3b42bfSRobert Love * @lport: The local port to register for state changes 121142e9a92fSRobert Love * 121242e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 121342e9a92fSRobert Love * this routine. 121442e9a92fSRobert Love */ 121542e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 121642e9a92fSRobert Love { 121742e9a92fSRobert Love struct fc_frame *fp; 121842e9a92fSRobert Love 12197414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 12207414705eSRobert Love fc_lport_state(lport)); 122142e9a92fSRobert Love 122242e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 122342e9a92fSRobert Love 122442e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 122542e9a92fSRobert Love if (!fp) { 122642e9a92fSRobert Love fc_lport_error(lport, fp); 122742e9a92fSRobert Love return; 122842e9a92fSRobert Love } 122942e9a92fSRobert Love 1230a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 1231b94f8951SJoe Eykholt fc_lport_scr_resp, lport, 1232b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 12338f550f93SChris Leech fc_lport_error(lport, NULL); 123442e9a92fSRobert Love } 123542e9a92fSRobert Love 123642e9a92fSRobert Love /** 1237c914f7d1SChris Leech * fc_lport_enter_ns() - register some object with the name server 123842e9a92fSRobert Love * @lport: Fibre Channel local port to register 123942e9a92fSRobert Love * 124042e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 124142e9a92fSRobert Love * this routine. 124242e9a92fSRobert Love */ 1243c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) 124442e9a92fSRobert Love { 124542e9a92fSRobert Love struct fc_frame *fp; 1246c914f7d1SChris Leech enum fc_ns_req cmd; 1247c914f7d1SChris Leech int size = sizeof(struct fc_ct_hdr); 1248c914f7d1SChris Leech size_t len; 124942e9a92fSRobert Love 1250c914f7d1SChris Leech FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1251c914f7d1SChris Leech fc_lport_state_names[state], 12527414705eSRobert Love fc_lport_state(lport)); 125342e9a92fSRobert Love 1254c914f7d1SChris Leech fc_lport_state_enter(lport, state); 125542e9a92fSRobert Love 1256c914f7d1SChris Leech switch (state) { 1257c914f7d1SChris Leech case LPORT_ST_RNN_ID: 1258c914f7d1SChris Leech cmd = FC_NS_RNN_ID; 1259c914f7d1SChris Leech size += sizeof(struct fc_ns_rn_id); 126042e9a92fSRobert Love break; 1261c914f7d1SChris Leech case LPORT_ST_RSNN_NN: 1262c9866a54SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1263c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1264c914f7d1SChris Leech if (!len) 1265c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1266c914f7d1SChris Leech cmd = FC_NS_RSNN_NN; 1267c914f7d1SChris Leech size += sizeof(struct fc_ns_rsnn) + len; 1268c914f7d1SChris Leech break; 1269c914f7d1SChris Leech case LPORT_ST_RSPN_ID: 12705baa17c3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1271c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1272c914f7d1SChris Leech if (!len) 1273c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1274c914f7d1SChris Leech cmd = FC_NS_RSPN_ID; 1275c914f7d1SChris Leech size += sizeof(struct fc_ns_rspn) + len; 1276c914f7d1SChris Leech break; 1277c914f7d1SChris Leech case LPORT_ST_RFT_ID: 1278c914f7d1SChris Leech cmd = FC_NS_RFT_ID; 1279c914f7d1SChris Leech size += sizeof(struct fc_ns_rft); 1280c914f7d1SChris Leech break; 1281ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1282ab593b18SJoe Eykholt cmd = FC_NS_RFF_ID; 1283ab593b18SJoe Eykholt size += sizeof(struct fc_ns_rff_id); 1284ab593b18SJoe Eykholt break; 1285c914f7d1SChris Leech default: 1286c914f7d1SChris Leech fc_lport_error(lport, NULL); 1287c914f7d1SChris Leech return; 1288c914f7d1SChris Leech } 1289c914f7d1SChris Leech 1290c914f7d1SChris Leech fp = fc_frame_alloc(lport, size); 12915baa17c3SChris Leech if (!fp) { 12925baa17c3SChris Leech fc_lport_error(lport, fp); 12935baa17c3SChris Leech return; 12945baa17c3SChris Leech } 12955baa17c3SChris Leech 1296c914f7d1SChris Leech if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, 12977cccc157SChris Leech fc_lport_ns_resp, 1298b94f8951SJoe Eykholt lport, 3 * lport->r_a_tov)) 1299c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1300c9c7bd7aSChris Leech } 1301c9c7bd7aSChris Leech 130242e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 130342e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 130442e9a92fSRobert Love }; 130542e9a92fSRobert Love 130642e9a92fSRobert Love /** 13073a3b42bfSRobert Love * fc_rport_enter_dns() - Create a fc_rport for the name server 13083a3b42bfSRobert Love * @lport: The local port requesting a remote port for the name server 130942e9a92fSRobert Love * 131042e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 131142e9a92fSRobert Love * this routine. 131242e9a92fSRobert Love */ 131342e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 131442e9a92fSRobert Love { 1315ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 131642e9a92fSRobert Love 13177414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 13187414705eSRobert Love fc_lport_state(lport)); 131942e9a92fSRobert Love 132042e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 132142e9a92fSRobert Love 132248f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 13239737e6a7SRobert Love rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV); 132448f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 13259fb9d328SJoe Eykholt if (!rdata) 132642e9a92fSRobert Love goto err; 132742e9a92fSRobert Love 132842e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 13299fb9d328SJoe Eykholt lport->tt.rport_login(rdata); 133042e9a92fSRobert Love return; 133142e9a92fSRobert Love 133242e9a92fSRobert Love err: 133342e9a92fSRobert Love fc_lport_error(lport, NULL); 133442e9a92fSRobert Love } 133542e9a92fSRobert Love 133642e9a92fSRobert Love /** 13373a3b42bfSRobert Love * fc_lport_timeout() - Handler for the retry_work timer 13383a3b42bfSRobert Love * @work: The work struct of the local port 133942e9a92fSRobert Love */ 134042e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 134142e9a92fSRobert Love { 134242e9a92fSRobert Love struct fc_lport *lport = 134342e9a92fSRobert Love container_of(work, struct fc_lport, 134442e9a92fSRobert Love retry_work.work); 134542e9a92fSRobert Love 134642e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 134742e9a92fSRobert Love 134842e9a92fSRobert Love switch (lport->state) { 1349b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 135042e9a92fSRobert Love WARN_ON(1); 135142e9a92fSRobert Love break; 135222655ac2SJoe Eykholt case LPORT_ST_READY: 135322655ac2SJoe Eykholt WARN_ON(1); 135422655ac2SJoe Eykholt break; 135522655ac2SJoe Eykholt case LPORT_ST_RESET: 135622655ac2SJoe Eykholt break; 135742e9a92fSRobert Love case LPORT_ST_FLOGI: 135842e9a92fSRobert Love fc_lport_enter_flogi(lport); 135942e9a92fSRobert Love break; 136042e9a92fSRobert Love case LPORT_ST_DNS: 136142e9a92fSRobert Love fc_lport_enter_dns(lport); 136242e9a92fSRobert Love break; 1363c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 13645baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1365c9866a54SChris Leech case LPORT_ST_RSPN_ID: 136642e9a92fSRobert Love case LPORT_ST_RFT_ID: 1367ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1368c914f7d1SChris Leech fc_lport_enter_ns(lport, lport->state); 136942e9a92fSRobert Love break; 137042e9a92fSRobert Love case LPORT_ST_SCR: 137142e9a92fSRobert Love fc_lport_enter_scr(lport); 137242e9a92fSRobert Love break; 137342e9a92fSRobert Love case LPORT_ST_LOGO: 137442e9a92fSRobert Love fc_lport_enter_logo(lport); 137542e9a92fSRobert Love break; 137642e9a92fSRobert Love } 137742e9a92fSRobert Love 137842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 137942e9a92fSRobert Love } 138042e9a92fSRobert Love 138142e9a92fSRobert Love /** 138234f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 13833a3b42bfSRobert Love * @sp: The sequence that the LOGO was on 13843a3b42bfSRobert Love * @fp: The LOGO frame 13853a3b42bfSRobert Love * @lp_arg: The lport port that received the LOGO request 138642e9a92fSRobert Love * 138742e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 13883a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 138942e9a92fSRobert Love * and then unlock the lport. 139042e9a92fSRobert Love */ 139111b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 139242e9a92fSRobert Love void *lp_arg) 139342e9a92fSRobert Love { 139442e9a92fSRobert Love struct fc_lport *lport = lp_arg; 139542e9a92fSRobert Love u8 op; 139642e9a92fSRobert Love 1397f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1398f657d299SJoe Eykholt 139942e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 140042e9a92fSRobert Love return; 140142e9a92fSRobert Love 140242e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 140342e9a92fSRobert Love 140442e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 14057414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 14067414705eSRobert Love "%s\n", fc_lport_state(lport)); 140776f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 140876f6804eSAbhijeet Joglekar goto err; 140942e9a92fSRobert Love goto out; 141042e9a92fSRobert Love } 141142e9a92fSRobert Love 141276f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 141376f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 141476f6804eSAbhijeet Joglekar goto err; 141576f6804eSAbhijeet Joglekar } 141676f6804eSAbhijeet Joglekar 141742e9a92fSRobert Love op = fc_frame_payload_op(fp); 141842e9a92fSRobert Love if (op == ELS_LS_ACC) 14191190d925SJoe Eykholt fc_lport_enter_disabled(lport); 142042e9a92fSRobert Love else 142142e9a92fSRobert Love fc_lport_error(lport, fp); 142242e9a92fSRobert Love 142342e9a92fSRobert Love out: 142442e9a92fSRobert Love fc_frame_free(fp); 142542e9a92fSRobert Love err: 142642e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 142742e9a92fSRobert Love } 142811b56188SChris Leech EXPORT_SYMBOL(fc_lport_logo_resp); 142942e9a92fSRobert Love 143042e9a92fSRobert Love /** 143134f42a07SRobert Love * fc_rport_enter_logo() - Logout of the fabric 14323a3b42bfSRobert Love * @lport: The local port to be logged out 143342e9a92fSRobert Love * 143442e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 143542e9a92fSRobert Love * this routine. 143642e9a92fSRobert Love */ 143742e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 143842e9a92fSRobert Love { 143942e9a92fSRobert Love struct fc_frame *fp; 144042e9a92fSRobert Love struct fc_els_logo *logo; 144142e9a92fSRobert Love 14427414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 14437414705eSRobert Love fc_lport_state(lport)); 144442e9a92fSRobert Love 144542e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 14468faecddbSChris Leech fc_vports_linkchange(lport); 144742e9a92fSRobert Love 144842e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 144942e9a92fSRobert Love if (!fp) { 145042e9a92fSRobert Love fc_lport_error(lport, fp); 145142e9a92fSRobert Love return; 145242e9a92fSRobert Love } 145342e9a92fSRobert Love 1454a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1455b94f8951SJoe Eykholt fc_lport_logo_resp, lport, 1456b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 14578f550f93SChris Leech fc_lport_error(lport, NULL); 145842e9a92fSRobert Love } 145942e9a92fSRobert Love 146042e9a92fSRobert Love /** 146134f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 14623a3b42bfSRobert Love * @sp: The sequence that the FLOGI was on 14633a3b42bfSRobert Love * @fp: The FLOGI response frame 14643a3b42bfSRobert Love * @lp_arg: The lport port that received the FLOGI response 146542e9a92fSRobert Love * 146642e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 14673a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 146842e9a92fSRobert Love * and then unlock the lport. 146942e9a92fSRobert Love */ 147011b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 147142e9a92fSRobert Love void *lp_arg) 147242e9a92fSRobert Love { 147342e9a92fSRobert Love struct fc_lport *lport = lp_arg; 147442e9a92fSRobert Love struct fc_els_flogi *flp; 147542e9a92fSRobert Love u32 did; 147642e9a92fSRobert Love u16 csp_flags; 147742e9a92fSRobert Love unsigned int r_a_tov; 147842e9a92fSRobert Love unsigned int e_d_tov; 147942e9a92fSRobert Love u16 mfs; 148042e9a92fSRobert Love 1481f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1482f657d299SJoe Eykholt 148342e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 148442e9a92fSRobert Love return; 148542e9a92fSRobert Love 148642e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 148742e9a92fSRobert Love 148842e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 14897414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 14907414705eSRobert Love "%s\n", fc_lport_state(lport)); 149176f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 149276f6804eSAbhijeet Joglekar goto err; 149342e9a92fSRobert Love goto out; 149442e9a92fSRobert Love } 149542e9a92fSRobert Love 149676f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 149776f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 149876f6804eSAbhijeet Joglekar goto err; 149976f6804eSAbhijeet Joglekar } 150076f6804eSAbhijeet Joglekar 1501251748a9SJoe Eykholt did = fc_frame_did(fp); 150260a3c4dfSVasu Dev if (fc_frame_payload_op(fp) == ELS_LS_ACC && did) { 150342e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 150442e9a92fSRobert Love if (flp) { 150542e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 150642e9a92fSRobert Love FC_SP_BB_DATA_MASK; 150742e9a92fSRobert Love if (mfs >= FC_SP_MIN_MAX_PAYLOAD && 150842e9a92fSRobert Love mfs < lport->mfs) 150942e9a92fSRobert Love lport->mfs = mfs; 151042e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 151142e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 151242e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 151342e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 151442e9a92fSRobert Love e_d_tov /= 1000000; 1515db36c06cSChris Leech 1516db36c06cSChris Leech lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); 1517db36c06cSChris Leech 151842e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 151942e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 152042e9a92fSRobert Love lport->e_d_tov = e_d_tov; 152142e9a92fSRobert Love lport->r_a_tov = 2 * e_d_tov; 1522093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 1523e6d8a1b0SJoe Eykholt printk(KERN_INFO "host%d: libfc: " 1524ce8b5df0SChris Leech "Port (%6.6x) entered " 1525e6d8a1b0SJoe Eykholt "point-to-point mode\n", 1526e6d8a1b0SJoe Eykholt lport->host->host_no, did); 1527251748a9SJoe Eykholt fc_lport_ptp_setup(lport, fc_frame_sid(fp), 152842e9a92fSRobert Love get_unaligned_be64( 152942e9a92fSRobert Love &flp->fl_wwpn), 153042e9a92fSRobert Love get_unaligned_be64( 153142e9a92fSRobert Love &flp->fl_wwnn)); 153242e9a92fSRobert Love } else { 153342e9a92fSRobert Love lport->e_d_tov = e_d_tov; 153442e9a92fSRobert Love lport->r_a_tov = r_a_tov; 153542e9a92fSRobert Love fc_host_fabric_name(lport->host) = 153642e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 1537093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 153842e9a92fSRobert Love fc_lport_enter_dns(lport); 153942e9a92fSRobert Love } 154042e9a92fSRobert Love } 154160a3c4dfSVasu Dev } else { 154260a3c4dfSVasu Dev FC_LPORT_DBG(lport, "FLOGI RJT or bad response\n"); 15437f985231SBhanu Prakash Gollapudi fc_lport_error(lport, fp); 154460a3c4dfSVasu Dev } 154542e9a92fSRobert Love 154642e9a92fSRobert Love out: 154742e9a92fSRobert Love fc_frame_free(fp); 154842e9a92fSRobert Love err: 154942e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 155042e9a92fSRobert Love } 155111b56188SChris Leech EXPORT_SYMBOL(fc_lport_flogi_resp); 155242e9a92fSRobert Love 155342e9a92fSRobert Love /** 155434f42a07SRobert Love * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager 155542e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 155642e9a92fSRobert Love * 155742e9a92fSRobert Love * Locking Note: The lport lock is expected to be held before calling 155842e9a92fSRobert Love * this routine. 155942e9a92fSRobert Love */ 156042e9a92fSRobert Love void fc_lport_enter_flogi(struct fc_lport *lport) 156142e9a92fSRobert Love { 156242e9a92fSRobert Love struct fc_frame *fp; 156342e9a92fSRobert Love 15647414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 15657414705eSRobert Love fc_lport_state(lport)); 156642e9a92fSRobert Love 156742e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 156842e9a92fSRobert Love 15693726f358SJoe Eykholt if (lport->point_to_multipoint) { 15703726f358SJoe Eykholt if (lport->port_id) 15713726f358SJoe Eykholt fc_lport_enter_ready(lport); 15723726f358SJoe Eykholt return; 15733726f358SJoe Eykholt } 15743726f358SJoe Eykholt 157542e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 157642e9a92fSRobert Love if (!fp) 157742e9a92fSRobert Love return fc_lport_error(lport, fp); 157842e9a92fSRobert Love 1579db36c06cSChris Leech if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, 1580db36c06cSChris Leech lport->vport ? ELS_FDISC : ELS_FLOGI, 1581b94f8951SJoe Eykholt fc_lport_flogi_resp, lport, 1582b94f8951SJoe Eykholt lport->vport ? 2 * lport->r_a_tov : 1583b94f8951SJoe Eykholt lport->e_d_tov)) 15848f550f93SChris Leech fc_lport_error(lport, NULL); 158542e9a92fSRobert Love } 158642e9a92fSRobert Love 15873a3b42bfSRobert Love /** 15883a3b42bfSRobert Love * fc_lport_config() - Configure a fc_lport 15893a3b42bfSRobert Love * @lport: The local port to be configured 15903a3b42bfSRobert Love */ 159142e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 159242e9a92fSRobert Love { 159372fa396bSVasu Dev INIT_LIST_HEAD(&lport->ema_list); 159442e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 159542e9a92fSRobert Love mutex_init(&lport->lp_mutex); 159642e9a92fSRobert Love 1597b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 159842e9a92fSRobert Love 159942e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 160042e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 1601acc1a921SKiran Patil fc_fc4_conf_lport_params(lport, FC_TYPE_FCP); 160242e9a92fSRobert Love 160342e9a92fSRobert Love return 0; 160442e9a92fSRobert Love } 160542e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 160642e9a92fSRobert Love 16073a3b42bfSRobert Love /** 16083a3b42bfSRobert Love * fc_lport_init() - Initialize the lport layer for a local port 16093a3b42bfSRobert Love * @lport: The local port to initialize the exchange layer for 16103a3b42bfSRobert Love */ 161142e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 161242e9a92fSRobert Love { 161342e9a92fSRobert Love if (!lport->tt.lport_recv) 161442e9a92fSRobert Love lport->tt.lport_recv = fc_lport_recv_req; 161542e9a92fSRobert Love 161642e9a92fSRobert Love if (!lport->tt.lport_reset) 161742e9a92fSRobert Love lport->tt.lport_reset = fc_lport_reset; 161842e9a92fSRobert Love 161942e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 162042e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 162142e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 162242e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 162342e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 162442e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 162542e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 162642e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 162742e9a92fSRobert Love 162842e9a92fSRobert Love /* This value is also unchanging */ 162942e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 163042e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 163142e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 163242e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 163342e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 163442e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 163542e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 163642e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 163742e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 163842e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 163970d53b04SJoe Eykholt fc_fc4_add_lport(lport); 164042e9a92fSRobert Love 164142e9a92fSRobert Love return 0; 164242e9a92fSRobert Love } 164342e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1644a51ab396SSteve Ma 1645a51ab396SSteve Ma /** 16463a3b42bfSRobert Love * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests 16473a3b42bfSRobert Love * @sp: The sequence for the FC Passthrough response 16483a3b42bfSRobert Love * @fp: The response frame 16493a3b42bfSRobert Love * @info_arg: The BSG info that the response is for 1650a51ab396SSteve Ma */ 1651a51ab396SSteve Ma static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, 1652a51ab396SSteve Ma void *info_arg) 1653a51ab396SSteve Ma { 1654a51ab396SSteve Ma struct fc_bsg_info *info = info_arg; 1655a51ab396SSteve Ma struct fc_bsg_job *job = info->job; 1656a51ab396SSteve Ma struct fc_lport *lport = info->lport; 1657a51ab396SSteve Ma struct fc_frame_header *fh; 1658a51ab396SSteve Ma size_t len; 1659a51ab396SSteve Ma void *buf; 1660a51ab396SSteve Ma 1661a51ab396SSteve Ma if (IS_ERR(fp)) { 1662a51ab396SSteve Ma job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? 1663a51ab396SSteve Ma -ECONNABORTED : -ETIMEDOUT; 1664a51ab396SSteve Ma job->reply_len = sizeof(uint32_t); 1665a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1666a51ab396SSteve Ma job->job_done(job); 1667a51ab396SSteve Ma kfree(info); 1668a51ab396SSteve Ma return; 1669a51ab396SSteve Ma } 1670a51ab396SSteve Ma 1671a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1672a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1673a51ab396SSteve Ma len = fr_len(fp) - sizeof(*fh); 1674a51ab396SSteve Ma buf = fc_frame_payload_get(fp, 0); 1675a51ab396SSteve Ma 1676a51ab396SSteve Ma if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { 1677a51ab396SSteve Ma /* Get the response code from the first frame payload */ 1678a51ab396SSteve Ma unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? 1679a51ab396SSteve Ma ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : 1680a51ab396SSteve Ma (unsigned short)fc_frame_payload_op(fp); 1681a51ab396SSteve Ma 1682a51ab396SSteve Ma /* Save the reply status of the job */ 1683a51ab396SSteve Ma job->reply->reply_data.ctels_reply.status = 1684a51ab396SSteve Ma (cmd == info->rsp_code) ? 1685a51ab396SSteve Ma FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; 1686a51ab396SSteve Ma } 1687a51ab396SSteve Ma 1688a51ab396SSteve Ma job->reply->reply_payload_rcv_len += 1689a51ab396SSteve Ma fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, 1690a51ab396SSteve Ma &info->offset, KM_BIO_SRC_IRQ, NULL); 1691a51ab396SSteve Ma 1692a51ab396SSteve Ma if (fr_eof(fp) == FC_EOF_T && 1693a51ab396SSteve Ma (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == 1694a51ab396SSteve Ma (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { 1695a51ab396SSteve Ma if (job->reply->reply_payload_rcv_len > 1696a51ab396SSteve Ma job->reply_payload.payload_len) 1697a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 1698a51ab396SSteve Ma job->reply_payload.payload_len; 1699a51ab396SSteve Ma job->reply->result = 0; 1700a51ab396SSteve Ma job->state_flags |= FC_RQST_STATE_DONE; 1701a51ab396SSteve Ma job->job_done(job); 1702a51ab396SSteve Ma kfree(info); 1703a51ab396SSteve Ma } 1704a51ab396SSteve Ma fc_frame_free(fp); 1705a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1706a51ab396SSteve Ma } 1707a51ab396SSteve Ma 1708a51ab396SSteve Ma /** 17093a3b42bfSRobert Love * fc_lport_els_request() - Send ELS passthrough request 17103a3b42bfSRobert Love * @job: The BSG Passthrough job 1711a51ab396SSteve Ma * @lport: The local port sending the request 17123a3b42bfSRobert Love * @did: The destination port id 1713a51ab396SSteve Ma * 1714a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1715a51ab396SSteve Ma * this routine. 1716a51ab396SSteve Ma */ 1717a51ab396SSteve Ma static int fc_lport_els_request(struct fc_bsg_job *job, 1718a51ab396SSteve Ma struct fc_lport *lport, 1719a51ab396SSteve Ma u32 did, u32 tov) 1720a51ab396SSteve Ma { 1721a51ab396SSteve Ma struct fc_bsg_info *info; 1722a51ab396SSteve Ma struct fc_frame *fp; 1723a51ab396SSteve Ma struct fc_frame_header *fh; 1724a51ab396SSteve Ma char *pp; 1725a51ab396SSteve Ma int len; 1726a51ab396SSteve Ma 172770d919fbSYi Zou fp = fc_frame_alloc(lport, job->request_payload.payload_len); 1728a51ab396SSteve Ma if (!fp) 1729a51ab396SSteve Ma return -ENOMEM; 1730a51ab396SSteve Ma 1731a51ab396SSteve Ma len = job->request_payload.payload_len; 1732a51ab396SSteve Ma pp = fc_frame_payload_get(fp, len); 1733a51ab396SSteve Ma 1734a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1735a51ab396SSteve Ma job->request_payload.sg_cnt, 1736a51ab396SSteve Ma pp, len); 1737a51ab396SSteve Ma 1738a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1739a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_ELS_REQ; 1740a51ab396SSteve Ma hton24(fh->fh_d_id, did); 17417b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1742a51ab396SSteve Ma fh->fh_type = FC_TYPE_ELS; 174324f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 1744a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1745a51ab396SSteve Ma fh->fh_df_ctl = 0; 1746a51ab396SSteve Ma fh->fh_parm_offset = 0; 1747a51ab396SSteve Ma 1748a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1749a51ab396SSteve Ma if (!info) { 1750a51ab396SSteve Ma fc_frame_free(fp); 1751a51ab396SSteve Ma return -ENOMEM; 1752a51ab396SSteve Ma } 1753a51ab396SSteve Ma 1754a51ab396SSteve Ma info->job = job; 1755a51ab396SSteve Ma info->lport = lport; 1756a51ab396SSteve Ma info->rsp_code = ELS_LS_ACC; 1757a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1758a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1759a51ab396SSteve Ma 1760a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 176172e0daadSHillf Danton NULL, info, tov)) { 176272e0daadSHillf Danton kfree(info); 1763a51ab396SSteve Ma return -ECOMM; 176472e0daadSHillf Danton } 1765a51ab396SSteve Ma return 0; 1766a51ab396SSteve Ma } 1767a51ab396SSteve Ma 1768a51ab396SSteve Ma /** 17693a3b42bfSRobert Love * fc_lport_ct_request() - Send CT Passthrough request 17703a3b42bfSRobert Love * @job: The BSG Passthrough job 1771a51ab396SSteve Ma * @lport: The local port sending the request 1772a51ab396SSteve Ma * @did: The destination FC-ID 17733a3b42bfSRobert Love * @tov: The timeout period to wait for the response 1774a51ab396SSteve Ma * 1775a51ab396SSteve Ma * Locking Note: The lport lock is expected to be held before calling 1776a51ab396SSteve Ma * this routine. 1777a51ab396SSteve Ma */ 1778a51ab396SSteve Ma static int fc_lport_ct_request(struct fc_bsg_job *job, 1779a51ab396SSteve Ma struct fc_lport *lport, u32 did, u32 tov) 1780a51ab396SSteve Ma { 1781a51ab396SSteve Ma struct fc_bsg_info *info; 1782a51ab396SSteve Ma struct fc_frame *fp; 1783a51ab396SSteve Ma struct fc_frame_header *fh; 1784a51ab396SSteve Ma struct fc_ct_req *ct; 1785a51ab396SSteve Ma size_t len; 1786a51ab396SSteve Ma 1787a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 1788a51ab396SSteve Ma job->request_payload.payload_len); 1789a51ab396SSteve Ma if (!fp) 1790a51ab396SSteve Ma return -ENOMEM; 1791a51ab396SSteve Ma 1792a51ab396SSteve Ma len = job->request_payload.payload_len; 1793a51ab396SSteve Ma ct = fc_frame_payload_get(fp, len); 1794a51ab396SSteve Ma 1795a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1796a51ab396SSteve Ma job->request_payload.sg_cnt, 1797a51ab396SSteve Ma ct, len); 1798a51ab396SSteve Ma 1799a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1800a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; 1801a51ab396SSteve Ma hton24(fh->fh_d_id, did); 18027b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1803a51ab396SSteve Ma fh->fh_type = FC_TYPE_CT; 180424f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 1805a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1806a51ab396SSteve Ma fh->fh_df_ctl = 0; 1807a51ab396SSteve Ma fh->fh_parm_offset = 0; 1808a51ab396SSteve Ma 1809a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1810a51ab396SSteve Ma if (!info) { 1811a51ab396SSteve Ma fc_frame_free(fp); 1812a51ab396SSteve Ma return -ENOMEM; 1813a51ab396SSteve Ma } 1814a51ab396SSteve Ma 1815a51ab396SSteve Ma info->job = job; 1816a51ab396SSteve Ma info->lport = lport; 1817a51ab396SSteve Ma info->rsp_code = FC_FS_ACC; 1818a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1819a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1820a51ab396SSteve Ma 1821a51ab396SSteve Ma if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, 18222d6dfb00SHillf Danton NULL, info, tov)) { 18232d6dfb00SHillf Danton kfree(info); 1824a51ab396SSteve Ma return -ECOMM; 18252d6dfb00SHillf Danton } 1826a51ab396SSteve Ma return 0; 1827a51ab396SSteve Ma } 1828a51ab396SSteve Ma 1829a51ab396SSteve Ma /** 1830a51ab396SSteve Ma * fc_lport_bsg_request() - The common entry point for sending 18313a3b42bfSRobert Love * FC Passthrough requests 18323a3b42bfSRobert Love * @job: The BSG passthrough job 1833a51ab396SSteve Ma */ 1834a51ab396SSteve Ma int fc_lport_bsg_request(struct fc_bsg_job *job) 1835a51ab396SSteve Ma { 1836a51ab396SSteve Ma struct request *rsp = job->req->next_rq; 1837a51ab396SSteve Ma struct Scsi_Host *shost = job->shost; 1838a51ab396SSteve Ma struct fc_lport *lport = shost_priv(shost); 1839a51ab396SSteve Ma struct fc_rport *rport; 1840a51ab396SSteve Ma struct fc_rport_priv *rdata; 1841a51ab396SSteve Ma int rc = -EINVAL; 1842a51ab396SSteve Ma u32 did; 1843a51ab396SSteve Ma 1844a51ab396SSteve Ma job->reply->reply_payload_rcv_len = 0; 1845b248df30SHugh Daschbach if (rsp) 1846a51ab396SSteve Ma rsp->resid_len = job->reply_payload.payload_len; 1847a51ab396SSteve Ma 1848a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1849a51ab396SSteve Ma 1850a51ab396SSteve Ma switch (job->request->msgcode) { 1851a51ab396SSteve Ma case FC_BSG_RPT_ELS: 1852a51ab396SSteve Ma rport = job->rport; 1853a51ab396SSteve Ma if (!rport) 1854a51ab396SSteve Ma break; 1855a51ab396SSteve Ma 1856a51ab396SSteve Ma rdata = rport->dd_data; 1857a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, rport->port_id, 1858a51ab396SSteve Ma rdata->e_d_tov); 1859a51ab396SSteve Ma break; 1860a51ab396SSteve Ma 1861a51ab396SSteve Ma case FC_BSG_RPT_CT: 1862a51ab396SSteve Ma rport = job->rport; 1863a51ab396SSteve Ma if (!rport) 1864a51ab396SSteve Ma break; 1865a51ab396SSteve Ma 1866a51ab396SSteve Ma rdata = rport->dd_data; 1867a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, rport->port_id, 1868a51ab396SSteve Ma rdata->e_d_tov); 1869a51ab396SSteve Ma break; 1870a51ab396SSteve Ma 1871a51ab396SSteve Ma case FC_BSG_HST_CT: 1872a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_ct.port_id); 1873a51ab396SSteve Ma if (did == FC_FID_DIR_SERV) 18743a3b42bfSRobert Love rdata = lport->dns_rdata; 1875a51ab396SSteve Ma else 1876a51ab396SSteve Ma rdata = lport->tt.rport_lookup(lport, did); 1877a51ab396SSteve Ma 1878a51ab396SSteve Ma if (!rdata) 1879a51ab396SSteve Ma break; 1880a51ab396SSteve Ma 1881a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); 1882a51ab396SSteve Ma break; 1883a51ab396SSteve Ma 1884a51ab396SSteve Ma case FC_BSG_HST_ELS_NOLOGIN: 1885a51ab396SSteve Ma did = ntoh24(job->request->rqst_data.h_els.port_id); 1886a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); 1887a51ab396SSteve Ma break; 1888a51ab396SSteve Ma } 1889a51ab396SSteve Ma 1890a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1891a51ab396SSteve Ma return rc; 1892a51ab396SSteve Ma } 1893a51ab396SSteve Ma EXPORT_SYMBOL(fc_lport_bsg_request); 1894