1a61127c2SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 242e9a92fSRobert Love /* 342e9a92fSRobert Love * Copyright(c) 2007 Intel Corporation. All rights reserved. 442e9a92fSRobert Love * 542e9a92fSRobert Love * Maintained at www.Open-FCoE.org 642e9a92fSRobert Love */ 742e9a92fSRobert Love 842e9a92fSRobert Love /* 942e9a92fSRobert Love * PORT LOCKING NOTES 1042e9a92fSRobert Love * 1142e9a92fSRobert Love * These comments only apply to the 'port code' which consists of the lport, 1242e9a92fSRobert Love * disc and rport blocks. 1342e9a92fSRobert Love * 1442e9a92fSRobert Love * MOTIVATION 1542e9a92fSRobert Love * 1642e9a92fSRobert Love * The lport, disc and rport blocks all have mutexes that are used to protect 1742e9a92fSRobert Love * those objects. The main motivation for these locks is to prevent from 1842e9a92fSRobert Love * having an lport reset just before we send a frame. In that scenario the 1942e9a92fSRobert Love * lport's FID would get set to zero and then we'd send a frame with an 2042e9a92fSRobert Love * invalid SID. We also need to ensure that states don't change unexpectedly 2142e9a92fSRobert Love * while processing another state. 2242e9a92fSRobert Love * 23732bee7aSUwe Kleine-König * HIERARCHY 2442e9a92fSRobert Love * 25732bee7aSUwe Kleine-König * The following hierarchy defines the locking rules. A greater lock 2642e9a92fSRobert Love * may be held before acquiring a lesser lock, but a lesser lock should never 27732bee7aSUwe Kleine-König * be held while attempting to acquire a greater lock. Here is the hierarchy- 2842e9a92fSRobert Love * 2942e9a92fSRobert Love * lport > disc, lport > rport, disc > rport 3042e9a92fSRobert Love * 3142e9a92fSRobert Love * CALLBACKS 3242e9a92fSRobert Love * 3342e9a92fSRobert Love * The callbacks cause complications with this scheme. There is a callback 3442e9a92fSRobert Love * from the rport (to either lport or disc) and a callback from disc 3542e9a92fSRobert Love * (to the lport). 3642e9a92fSRobert Love * 3742e9a92fSRobert Love * As rports exit the rport state machine a callback is made to the owner of 3842e9a92fSRobert Love * the rport to notify success or failure. Since the callback is likely to 3942e9a92fSRobert Love * cause the lport or disc to grab its lock we cannot hold the rport lock 4042e9a92fSRobert Love * while making the callback. To ensure that the rport is not free'd while 4142e9a92fSRobert Love * processing the callback the rport callbacks are serialized through a 4242e9a92fSRobert Love * single-threaded workqueue. An rport would never be free'd while in a 4325985edcSLucas De Marchi * callback handler because no other rport work in this queue can be executed 4442e9a92fSRobert Love * at the same time. 4542e9a92fSRobert Love * 4642e9a92fSRobert Love * When discovery succeeds or fails a callback is made to the lport as 47af901ca1SAndré Goddard Rosa * notification. Currently, successful discovery causes the lport to take no 4842e9a92fSRobert Love * action. A failure will cause the lport to reset. There is likely a circular 4942e9a92fSRobert Love * locking problem with this implementation. 5042e9a92fSRobert Love */ 5142e9a92fSRobert Love 5242e9a92fSRobert Love /* 5342e9a92fSRobert Love * LPORT LOCKING 5442e9a92fSRobert Love * 5542e9a92fSRobert Love * The critical sections protected by the lport's mutex are quite broad and 5642e9a92fSRobert Love * may be improved upon in the future. The lport code and its locking doesn't 5742e9a92fSRobert Love * influence the I/O path, so excessive locking doesn't penalize I/O 5842e9a92fSRobert Love * performance. 5942e9a92fSRobert Love * 6042e9a92fSRobert Love * The strategy is to lock whenever processing a request or response. Note 6142e9a92fSRobert Love * that every _enter_* function corresponds to a state change. They generally 6242e9a92fSRobert Love * change the lports state and then send a request out on the wire. We lock 6342e9a92fSRobert Love * before calling any of these functions to protect that state change. This 6442e9a92fSRobert Love * means that the entry points into the lport block manage the locks while 6542e9a92fSRobert Love * the state machine can transition between states (i.e. _enter_* functions) 6642e9a92fSRobert Love * while always staying protected. 6742e9a92fSRobert Love * 6842e9a92fSRobert Love * When handling responses we also hold the lport mutex broadly. When the 6942e9a92fSRobert Love * lport receives the response frame it locks the mutex and then calls the 7042e9a92fSRobert Love * appropriate handler for the particuar response. Generally a response will 7142e9a92fSRobert Love * trigger a state change and so the lock must already be held. 7242e9a92fSRobert Love * 7342e9a92fSRobert Love * Retries also have to consider the locking. The retries occur from a work 7442e9a92fSRobert Love * context and the work function will lock the lport and then retry the state 7542e9a92fSRobert Love * (i.e. _enter_* function). 7642e9a92fSRobert Love */ 7742e9a92fSRobert Love 7842e9a92fSRobert Love #include <linux/timer.h> 7977a2b73aSVasu Dev #include <linux/delay.h> 80acf3368fSPaul Gortmaker #include <linux/module.h> 815a0e3ad6STejun Heo #include <linux/slab.h> 8242e9a92fSRobert Love #include <asm/unaligned.h> 8342e9a92fSRobert Love 8442e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 8542e9a92fSRobert Love 8642e9a92fSRobert Love #include <scsi/libfc.h> 87a51ab396SSteve Ma #include <linux/scatterlist.h> 8842e9a92fSRobert Love 89e31ac898SArnd Bergmann #include "fc_encode.h" 908866a5d9SRobert Love #include "fc_libfc.h" 918866a5d9SRobert Love 9242e9a92fSRobert Love /* Fabric IDs to use for point-to-point mode, chosen on whims. */ 9342e9a92fSRobert Love #define FC_LOCAL_PTP_FID_LO 0x010101 9442e9a92fSRobert Love #define FC_LOCAL_PTP_FID_HI 0x010102 9542e9a92fSRobert Love 9642e9a92fSRobert Love #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ 9742e9a92fSRobert Love 9842e9a92fSRobert Love static void fc_lport_error(struct fc_lport *, struct fc_frame *); 9942e9a92fSRobert Love 10042e9a92fSRobert Love static void fc_lport_enter_reset(struct fc_lport *); 10142e9a92fSRobert Love static void fc_lport_enter_flogi(struct fc_lport *); 10242e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *); 103c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); 10442e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *); 10542e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *); 10642e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *); 107d78c317fSNeerav Parikh static void fc_lport_enter_fdmi(struct fc_lport *lport); 108d78c317fSNeerav Parikh static void fc_lport_enter_ms(struct fc_lport *, enum fc_lport_state); 10942e9a92fSRobert Love 11042e9a92fSRobert Love static const char *fc_lport_state_names[] = { 111b1d9fd55SJoe Eykholt [LPORT_ST_DISABLED] = "disabled", 11242e9a92fSRobert Love [LPORT_ST_FLOGI] = "FLOGI", 11342e9a92fSRobert Love [LPORT_ST_DNS] = "dNS", 114c9c7bd7aSChris Leech [LPORT_ST_RNN_ID] = "RNN_ID", 1155baa17c3SChris Leech [LPORT_ST_RSNN_NN] = "RSNN_NN", 116c9866a54SChris Leech [LPORT_ST_RSPN_ID] = "RSPN_ID", 11742e9a92fSRobert Love [LPORT_ST_RFT_ID] = "RFT_ID", 118ab593b18SJoe Eykholt [LPORT_ST_RFF_ID] = "RFF_ID", 119d78c317fSNeerav Parikh [LPORT_ST_FDMI] = "FDMI", 120d78c317fSNeerav Parikh [LPORT_ST_RHBA] = "RHBA", 121d78c317fSNeerav Parikh [LPORT_ST_RPA] = "RPA", 122d78c317fSNeerav Parikh [LPORT_ST_DHBA] = "DHBA", 123d78c317fSNeerav Parikh [LPORT_ST_DPRT] = "DPRT", 12442e9a92fSRobert Love [LPORT_ST_SCR] = "SCR", 12542e9a92fSRobert Love [LPORT_ST_READY] = "Ready", 12642e9a92fSRobert Love [LPORT_ST_LOGO] = "LOGO", 12742e9a92fSRobert Love [LPORT_ST_RESET] = "reset", 12842e9a92fSRobert Love }; 12942e9a92fSRobert Love 130a51ab396SSteve Ma /** 131a51ab396SSteve Ma * struct fc_bsg_info - FC Passthrough managemet structure 132a51ab396SSteve Ma * @job: The passthrough job 133a51ab396SSteve Ma * @lport: The local port to pass through a command 134a51ab396SSteve Ma * @rsp_code: The expected response code 135a51ab396SSteve Ma * @sg: job->reply_payload.sg_list 136a51ab396SSteve Ma * @nents: job->reply_payload.sg_cnt 137a51ab396SSteve Ma * @offset: The offset into the response data 138a51ab396SSteve Ma */ 139a51ab396SSteve Ma struct fc_bsg_info { 14075cc8cfcSJohannes Thumshirn struct bsg_job *job; 141a51ab396SSteve Ma struct fc_lport *lport; 142a51ab396SSteve Ma u16 rsp_code; 143a51ab396SSteve Ma struct scatterlist *sg; 144a51ab396SSteve Ma u32 nents; 145a51ab396SSteve Ma size_t offset; 146a51ab396SSteve Ma }; 147a51ab396SSteve Ma 1483a3b42bfSRobert Love /** 1493a3b42bfSRobert Love * fc_frame_drop() - Dummy frame handler 1503a3b42bfSRobert Love * @lport: The local port the frame was received on 1513a3b42bfSRobert Love * @fp: The received frame 1523a3b42bfSRobert Love */ 15342e9a92fSRobert Love static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) 15442e9a92fSRobert Love { 15542e9a92fSRobert Love fc_frame_free(fp); 15642e9a92fSRobert Love return 0; 15742e9a92fSRobert Love } 15842e9a92fSRobert Love 15942e9a92fSRobert Love /** 16034f42a07SRobert Love * fc_lport_rport_callback() - Event handler for rport events 16142e9a92fSRobert Love * @lport: The lport which is receiving the event 1629fb9d328SJoe Eykholt * @rdata: private remote port data 16325985edcSLucas De Marchi * @event: The event that occurred 16442e9a92fSRobert Love * 16542e9a92fSRobert Love * Locking Note: The rport lock should not be held when calling 16642e9a92fSRobert Love * this function. 16742e9a92fSRobert Love */ 16842e9a92fSRobert Love static void fc_lport_rport_callback(struct fc_lport *lport, 1699fb9d328SJoe Eykholt struct fc_rport_priv *rdata, 17042e9a92fSRobert Love enum fc_rport_event event) 17142e9a92fSRobert Love { 172ce8b5df0SChris Leech FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event, 173f211fa51SJoe Eykholt rdata->ids.port_id); 17442e9a92fSRobert Love 175b5cbf083SJoe Eykholt mutex_lock(&lport->lp_mutex); 17642e9a92fSRobert Love switch (event) { 1774c0f62b5SJoe Eykholt case RPORT_EV_READY: 17842e9a92fSRobert Love if (lport->state == LPORT_ST_DNS) { 1793a3b42bfSRobert Love lport->dns_rdata = rdata; 180c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); 181d78c317fSNeerav Parikh } else if (lport->state == LPORT_ST_FDMI) { 182d78c317fSNeerav Parikh lport->ms_rdata = rdata; 183d78c317fSNeerav Parikh fc_lport_enter_ms(lport, LPORT_ST_DHBA); 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 " 188d78c317fSNeerav Parikh "in the DNS or FDMI state, it's in the " 189f211fa51SJoe Eykholt "%d state", rdata->ids.port_id, 19042e9a92fSRobert Love lport->state); 191c96c792aSHannes Reinecke fc_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: 197d78c317fSNeerav Parikh if (rdata->ids.port_id == FC_FID_DIR_SERV) 1983a3b42bfSRobert Love lport->dns_rdata = NULL; 199d78c317fSNeerav Parikh else if (rdata->ids.port_id == FC_FID_MGMT_SERV) 200d78c317fSNeerav Parikh lport->ms_rdata = NULL; 20142e9a92fSRobert Love break; 20242e9a92fSRobert Love case RPORT_EV_NONE: 20342e9a92fSRobert Love break; 20442e9a92fSRobert Love } 205b5cbf083SJoe Eykholt mutex_unlock(&lport->lp_mutex); 20642e9a92fSRobert Love } 20742e9a92fSRobert Love 20842e9a92fSRobert Love /** 20934f42a07SRobert Love * fc_lport_state() - Return a string which represents the lport's state 21042e9a92fSRobert Love * @lport: The lport whose state is to converted to a string 21142e9a92fSRobert Love */ 21242e9a92fSRobert Love static const char *fc_lport_state(struct fc_lport *lport) 21342e9a92fSRobert Love { 21442e9a92fSRobert Love const char *cp; 21542e9a92fSRobert Love 21642e9a92fSRobert Love cp = fc_lport_state_names[lport->state]; 21742e9a92fSRobert Love if (!cp) 21842e9a92fSRobert Love cp = "unknown"; 21942e9a92fSRobert Love return cp; 22042e9a92fSRobert Love } 22142e9a92fSRobert Love 22242e9a92fSRobert Love /** 22334f42a07SRobert Love * fc_lport_ptp_setup() - Create an rport for point-to-point mode 22442e9a92fSRobert Love * @lport: The lport to attach the ptp rport to 2253a3b42bfSRobert Love * @remote_fid: The FID of the ptp rport 22642e9a92fSRobert Love * @remote_wwpn: The WWPN of the ptp rport 22742e9a92fSRobert Love * @remote_wwnn: The WWNN of the ptp rport 22842e9a92fSRobert Love */ 22942e9a92fSRobert Love static void fc_lport_ptp_setup(struct fc_lport *lport, 23042e9a92fSRobert Love u32 remote_fid, u64 remote_wwpn, 23142e9a92fSRobert Love u64 remote_wwnn) 23242e9a92fSRobert Love { 233ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 234ee35624eSHannes Reinecke 2352f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 236c96c792aSHannes Reinecke fc_rport_logoff(lport->ptp_rdata); 237944ef968SHannes Reinecke kref_put(&lport->ptp_rdata->kref, fc_rport_destroy); 2382f2ac4a0SJoe Eykholt } 239a407c593SHannes Reinecke mutex_lock(&lport->disc.disc_mutex); 2402580064bSHannes Reinecke lport->ptp_rdata = fc_rport_create(lport, remote_fid); 2412f2ac4a0SJoe Eykholt kref_get(&lport->ptp_rdata->kref); 2423a3b42bfSRobert Love lport->ptp_rdata->ids.port_name = remote_wwpn; 2433a3b42bfSRobert Love lport->ptp_rdata->ids.node_name = remote_wwnn; 24448f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 24542e9a92fSRobert Love 24605d7d3b0SHannes Reinecke fc_rport_login(lport->ptp_rdata); 24742e9a92fSRobert Love 24842e9a92fSRobert Love fc_lport_enter_ready(lport); 24942e9a92fSRobert Love } 25042e9a92fSRobert Love 2513a3b42bfSRobert Love /** 2523a3b42bfSRobert Love * fc_get_host_port_state() - Return the port state of the given Scsi_Host 2533a3b42bfSRobert Love * @shost: The SCSI host whose port state is to be determined 2543a3b42bfSRobert Love */ 25542e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost) 25642e9a92fSRobert Love { 2573a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 25842e9a92fSRobert Love 2593a3b42bfSRobert Love mutex_lock(&lport->lp_mutex); 2603a3b42bfSRobert Love if (!lport->link_up) 2618faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 26242e9a92fSRobert Love else 2633a3b42bfSRobert Love switch (lport->state) { 2648faecddbSChris Leech case LPORT_ST_READY: 2658faecddbSChris Leech fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 2668faecddbSChris Leech break; 2678faecddbSChris Leech default: 26842e9a92fSRobert Love fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 26942e9a92fSRobert Love } 2703a3b42bfSRobert Love mutex_unlock(&lport->lp_mutex); 2718faecddbSChris Leech } 27242e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_port_state); 27342e9a92fSRobert Love 2743a3b42bfSRobert Love /** 2753a3b42bfSRobert Love * fc_get_host_speed() - Return the speed of the given Scsi_Host 2763a3b42bfSRobert Love * @shost: The SCSI host whose port speed is to be determined 2773a3b42bfSRobert Love */ 27842e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost) 27942e9a92fSRobert Love { 28042e9a92fSRobert Love struct fc_lport *lport = shost_priv(shost); 28142e9a92fSRobert Love 28242e9a92fSRobert Love fc_host_speed(shost) = lport->link_speed; 28342e9a92fSRobert Love } 28442e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_speed); 28542e9a92fSRobert Love 2863a3b42bfSRobert Love /** 2873a3b42bfSRobert Love * fc_get_host_stats() - Return the Scsi_Host's statistics 2883a3b42bfSRobert Love * @shost: The SCSI host whose statistics are to be returned 2893a3b42bfSRobert Love */ 29042e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) 29142e9a92fSRobert Love { 2921bd49b48SVasu Dev struct fc_host_statistics *fc_stats; 2933a3b42bfSRobert Love struct fc_lport *lport = shost_priv(shost); 294582b45bcSRobert Love unsigned int cpu; 2955f0e385fSJoe Eykholt u64 fcp_in_bytes = 0; 2965f0e385fSJoe Eykholt u64 fcp_out_bytes = 0; 29742e9a92fSRobert Love 2981bd49b48SVasu Dev fc_stats = &lport->host_stats; 2991bd49b48SVasu Dev memset(fc_stats, 0, sizeof(struct fc_host_statistics)); 30042e9a92fSRobert Love 301208da78eSJohannes Thumshirn fc_stats->seconds_since_last_reset = (jiffies - lport->boot_time) / HZ; 30242e9a92fSRobert Love 303582b45bcSRobert Love for_each_possible_cpu(cpu) { 3041bd49b48SVasu Dev struct fc_stats *stats; 305582b45bcSRobert Love 3061bd49b48SVasu Dev stats = per_cpu_ptr(lport->stats, cpu); 307582b45bcSRobert Love 3081bd49b48SVasu Dev fc_stats->tx_frames += stats->TxFrames; 3091bd49b48SVasu Dev fc_stats->tx_words += stats->TxWords; 3101bd49b48SVasu Dev fc_stats->rx_frames += stats->RxFrames; 3111bd49b48SVasu Dev fc_stats->rx_words += stats->RxWords; 3121bd49b48SVasu Dev fc_stats->error_frames += stats->ErrorFrames; 3131bd49b48SVasu Dev fc_stats->invalid_crc_count += stats->InvalidCRCCount; 3141bd49b48SVasu Dev fc_stats->fcp_input_requests += stats->InputRequests; 3151bd49b48SVasu Dev fc_stats->fcp_output_requests += stats->OutputRequests; 3161bd49b48SVasu Dev fc_stats->fcp_control_requests += stats->ControlRequests; 3175f0e385fSJoe Eykholt fcp_in_bytes += stats->InputBytes; 3185f0e385fSJoe Eykholt fcp_out_bytes += stats->OutputBytes; 3194e5fae7aSVasu Dev fc_stats->fcp_packet_alloc_failures += stats->FcpPktAllocFails; 3204e5fae7aSVasu Dev fc_stats->fcp_packet_aborts += stats->FcpPktAborts; 3214e5fae7aSVasu Dev fc_stats->fcp_frame_alloc_failures += stats->FcpFrameAllocFails; 3221bd49b48SVasu Dev fc_stats->link_failure_count += stats->LinkFailureCount; 32342e9a92fSRobert Love } 3241bd49b48SVasu Dev fc_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000); 3251bd49b48SVasu Dev fc_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000); 3261bd49b48SVasu Dev fc_stats->lip_count = -1; 3271bd49b48SVasu Dev fc_stats->nos_count = -1; 3281bd49b48SVasu Dev fc_stats->loss_of_sync_count = -1; 3291bd49b48SVasu Dev fc_stats->loss_of_signal_count = -1; 3301bd49b48SVasu Dev fc_stats->prim_seq_protocol_err_count = -1; 3311bd49b48SVasu Dev fc_stats->dumped_frames = -1; 3324e5fae7aSVasu Dev 3334e5fae7aSVasu Dev /* update exches stats */ 3344e5fae7aSVasu Dev fc_exch_update_stats(lport); 3354e5fae7aSVasu Dev 3361bd49b48SVasu Dev return fc_stats; 33742e9a92fSRobert Love } 33842e9a92fSRobert Love EXPORT_SYMBOL(fc_get_host_stats); 33942e9a92fSRobert Love 3403a3b42bfSRobert Love /** 3413a3b42bfSRobert Love * fc_lport_flogi_fill() - Fill in FLOGI command for request 3423a3b42bfSRobert Love * @lport: The local port the FLOGI is for 3433a3b42bfSRobert Love * @flogi: The FLOGI command 3443a3b42bfSRobert Love * @op: The opcode 34542e9a92fSRobert Love */ 3463a3b42bfSRobert Love static void fc_lport_flogi_fill(struct fc_lport *lport, 3473a3b42bfSRobert Love struct fc_els_flogi *flogi, 34842e9a92fSRobert Love unsigned int op) 34942e9a92fSRobert Love { 35042e9a92fSRobert Love struct fc_els_csp *sp; 35142e9a92fSRobert Love struct fc_els_cssp *cp; 35242e9a92fSRobert Love 35342e9a92fSRobert Love memset(flogi, 0, sizeof(*flogi)); 35442e9a92fSRobert Love flogi->fl_cmd = (u8) op; 35542e9a92fSRobert Love put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); 35642e9a92fSRobert Love put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); 35742e9a92fSRobert Love sp = &flogi->fl_csp; 35842e9a92fSRobert Love sp->sp_hi_ver = 0x20; 35942e9a92fSRobert Love sp->sp_lo_ver = 0x20; 36042e9a92fSRobert Love sp->sp_bb_cred = htons(10); /* this gets set by gateway */ 36142e9a92fSRobert Love sp->sp_bb_data = htons((u16) lport->mfs); 36242e9a92fSRobert Love cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ 36342e9a92fSRobert Love cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); 36442e9a92fSRobert Love if (op != ELS_FLOGI) { 36542e9a92fSRobert Love sp->sp_features = htons(FC_SP_FT_CIRO); 36642e9a92fSRobert Love sp->sp_tot_seq = htons(255); /* seq. we accept */ 36742e9a92fSRobert Love sp->sp_rel_off = htons(0x1f); 36842e9a92fSRobert Love sp->sp_e_d_tov = htonl(lport->e_d_tov); 36942e9a92fSRobert Love 37042e9a92fSRobert Love cp->cp_rdfs = htons((u16) lport->mfs); 37142e9a92fSRobert Love cp->cp_con_seq = htons(255); 37242e9a92fSRobert Love cp->cp_open_seq = 1; 37342e9a92fSRobert Love } 37442e9a92fSRobert Love } 37542e9a92fSRobert Love 3763a3b42bfSRobert Love /** 3773a3b42bfSRobert Love * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port 3783a3b42bfSRobert Love * @lport: The local port to add a new FC-4 type to 3793a3b42bfSRobert Love * @type: The new FC-4 type 38042e9a92fSRobert Love */ 38142e9a92fSRobert Love static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) 38242e9a92fSRobert Love { 38342e9a92fSRobert Love __be32 *mp; 38442e9a92fSRobert Love 38542e9a92fSRobert Love mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; 38642e9a92fSRobert Love *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); 38742e9a92fSRobert Love } 38842e9a92fSRobert Love 38942e9a92fSRobert Love /** 39034f42a07SRobert Love * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. 39125985edcSLucas De Marchi * @lport: Fibre Channel local port receiving the RLIR 39292261156SJoe Eykholt * @fp: The RLIR request frame 39342e9a92fSRobert Love */ 39492261156SJoe Eykholt static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp) 39542e9a92fSRobert Love { 396ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 397ee35624eSHannes Reinecke 3987414705eSRobert Love FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", 39942e9a92fSRobert Love fc_lport_state(lport)); 40042e9a92fSRobert Love 4017ab24dd1SHannes Reinecke fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL); 40242e9a92fSRobert Love fc_frame_free(fp); 40342e9a92fSRobert Love } 40442e9a92fSRobert Love 40542e9a92fSRobert Love /** 40634f42a07SRobert Love * fc_lport_recv_echo_req() - Handle received ECHO request 40725985edcSLucas De Marchi * @lport: The local port receiving the ECHO 4089865a04dSLee Jones * @in_fp: ECHO request frame 40942e9a92fSRobert Love */ 41092261156SJoe Eykholt static void fc_lport_recv_echo_req(struct fc_lport *lport, 41192261156SJoe Eykholt struct fc_frame *in_fp) 41242e9a92fSRobert Love { 41342e9a92fSRobert Love struct fc_frame *fp; 41442e9a92fSRobert Love unsigned int len; 41542e9a92fSRobert Love void *pp; 41642e9a92fSRobert Love void *dp; 41742e9a92fSRobert Love 418ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 419ee35624eSHannes Reinecke 4201b69bc06SJoe Eykholt FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", 42142e9a92fSRobert Love fc_lport_state(lport)); 42242e9a92fSRobert Love 42342e9a92fSRobert Love len = fr_len(in_fp) - sizeof(struct fc_frame_header); 42442e9a92fSRobert Love pp = fc_frame_payload_get(in_fp, len); 42542e9a92fSRobert Love 42642e9a92fSRobert Love if (len < sizeof(__be32)) 42742e9a92fSRobert Love len = sizeof(__be32); 42842e9a92fSRobert Love 42942e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 43042e9a92fSRobert Love if (fp) { 43142e9a92fSRobert Love dp = fc_frame_payload_get(fp, len); 43242e9a92fSRobert Love memcpy(dp, pp, len); 4331b69bc06SJoe Eykholt *((__be32 *)dp) = htonl(ELS_LS_ACC << 24); 43424f089e2SJoe Eykholt fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); 43524f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 43642e9a92fSRobert Love } 43742e9a92fSRobert Love fc_frame_free(in_fp); 43842e9a92fSRobert Love } 43942e9a92fSRobert Love 44042e9a92fSRobert Love /** 4411b69bc06SJoe Eykholt * fc_lport_recv_rnid_req() - Handle received Request Node ID data request 44225985edcSLucas De Marchi * @lport: The local port receiving the RNID 4439865a04dSLee Jones * @in_fp: The RNID request frame 44442e9a92fSRobert Love */ 44592261156SJoe Eykholt static void fc_lport_recv_rnid_req(struct fc_lport *lport, 44692261156SJoe Eykholt struct fc_frame *in_fp) 44742e9a92fSRobert Love { 44842e9a92fSRobert Love struct fc_frame *fp; 44942e9a92fSRobert Love struct fc_els_rnid *req; 45042e9a92fSRobert Love struct { 45142e9a92fSRobert Love struct fc_els_rnid_resp rnid; 45242e9a92fSRobert Love struct fc_els_rnid_cid cid; 45342e9a92fSRobert Love struct fc_els_rnid_gen gen; 45442e9a92fSRobert Love } *rp; 45542e9a92fSRobert Love struct fc_seq_els_data rjt_data; 45642e9a92fSRobert Love u8 fmt; 45742e9a92fSRobert Love size_t len; 45842e9a92fSRobert Love 459ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 460ee35624eSHannes Reinecke 4617414705eSRobert Love FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", 46242e9a92fSRobert Love fc_lport_state(lport)); 46342e9a92fSRobert Love 46442e9a92fSRobert Love req = fc_frame_payload_get(in_fp, sizeof(*req)); 46542e9a92fSRobert Love if (!req) { 46642e9a92fSRobert Love rjt_data.reason = ELS_RJT_LOGIC; 46742e9a92fSRobert Love rjt_data.explan = ELS_EXPL_NONE; 4687ab24dd1SHannes Reinecke fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); 46942e9a92fSRobert Love } else { 47042e9a92fSRobert Love fmt = req->rnid_fmt; 47142e9a92fSRobert Love len = sizeof(*rp); 47242e9a92fSRobert Love if (fmt != ELS_RNIDF_GEN || 47342e9a92fSRobert Love ntohl(lport->rnid_gen.rnid_atype) == 0) { 47442e9a92fSRobert Love fmt = ELS_RNIDF_NONE; /* nothing to provide */ 47542e9a92fSRobert Love len -= sizeof(rp->gen); 47642e9a92fSRobert Love } 47742e9a92fSRobert Love fp = fc_frame_alloc(lport, len); 47842e9a92fSRobert Love if (fp) { 47942e9a92fSRobert Love rp = fc_frame_payload_get(fp, len); 48042e9a92fSRobert Love memset(rp, 0, len); 48142e9a92fSRobert Love rp->rnid.rnid_cmd = ELS_LS_ACC; 48242e9a92fSRobert Love rp->rnid.rnid_fmt = fmt; 48342e9a92fSRobert Love rp->rnid.rnid_cid_len = sizeof(rp->cid); 48442e9a92fSRobert Love rp->cid.rnid_wwpn = htonll(lport->wwpn); 48542e9a92fSRobert Love rp->cid.rnid_wwnn = htonll(lport->wwnn); 48642e9a92fSRobert Love if (fmt == ELS_RNIDF_GEN) { 48742e9a92fSRobert Love rp->rnid.rnid_sid_len = sizeof(rp->gen); 48842e9a92fSRobert Love memcpy(&rp->gen, &lport->rnid_gen, 48942e9a92fSRobert Love sizeof(rp->gen)); 49042e9a92fSRobert Love } 49124f089e2SJoe Eykholt fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); 49224f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 49342e9a92fSRobert Love } 49442e9a92fSRobert Love } 49542e9a92fSRobert Love fc_frame_free(in_fp); 49642e9a92fSRobert Love } 49742e9a92fSRobert Love 49842e9a92fSRobert Love /** 49934f42a07SRobert Love * fc_lport_recv_logo_req() - Handle received fabric LOGO request 50025985edcSLucas De Marchi * @lport: The local port receiving the LOGO 50192261156SJoe Eykholt * @fp: The LOGO request frame 50242e9a92fSRobert Love */ 50392261156SJoe Eykholt static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) 50442e9a92fSRobert Love { 505ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 506ee35624eSHannes Reinecke 5077ab24dd1SHannes Reinecke fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL); 50842e9a92fSRobert Love fc_lport_enter_reset(lport); 50942e9a92fSRobert Love fc_frame_free(fp); 51042e9a92fSRobert Love } 51142e9a92fSRobert Love 51242e9a92fSRobert Love /** 51334f42a07SRobert Love * fc_fabric_login() - Start the lport state machine 5143a3b42bfSRobert Love * @lport: The local port that should log into the fabric 51542e9a92fSRobert Love * 51642e9a92fSRobert Love * Locking Note: This function should not be called 51742e9a92fSRobert Love * with the lport lock held. 51842e9a92fSRobert Love */ 51942e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lport) 52042e9a92fSRobert Love { 52142e9a92fSRobert Love int rc = -1; 52242e9a92fSRobert Love 52342e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 52455a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || 52555a66d3cSVasu Dev lport->state == LPORT_ST_LOGO) { 52655a66d3cSVasu Dev fc_lport_state_enter(lport, LPORT_ST_RESET); 52742e9a92fSRobert Love fc_lport_enter_reset(lport); 52842e9a92fSRobert Love rc = 0; 52942e9a92fSRobert Love } 53042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 53142e9a92fSRobert Love 53242e9a92fSRobert Love return rc; 53342e9a92fSRobert Love } 53442e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_login); 53542e9a92fSRobert Love 53642e9a92fSRobert Love /** 5378faecddbSChris Leech * __fc_linkup() - Handler for transport linkup events 5388faecddbSChris Leech * @lport: The lport whose link is up 5398faecddbSChris Leech */ 5408faecddbSChris Leech void __fc_linkup(struct fc_lport *lport) 5418faecddbSChris Leech { 542ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 543ee35624eSHannes Reinecke 5448faecddbSChris Leech if (!lport->link_up) { 5458faecddbSChris Leech lport->link_up = 1; 5468faecddbSChris Leech 5478faecddbSChris Leech if (lport->state == LPORT_ST_RESET) 5488faecddbSChris Leech fc_lport_enter_flogi(lport); 5498faecddbSChris Leech } 5508faecddbSChris Leech } 5518faecddbSChris Leech 5528faecddbSChris Leech /** 55334f42a07SRobert Love * fc_linkup() - Handler for transport linkup events 5543a3b42bfSRobert Love * @lport: The local port whose link is up 55542e9a92fSRobert Love */ 55642e9a92fSRobert Love void fc_linkup(struct fc_lport *lport) 55742e9a92fSRobert Love { 558ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", 5597b2787ecSRobert Love lport->host->host_no, lport->port_id); 56042e9a92fSRobert Love 56142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 5628faecddbSChris Leech __fc_linkup(lport); 56342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 56442e9a92fSRobert Love } 56542e9a92fSRobert Love EXPORT_SYMBOL(fc_linkup); 56642e9a92fSRobert Love 56742e9a92fSRobert Love /** 5688faecddbSChris Leech * __fc_linkdown() - Handler for transport linkdown events 5698faecddbSChris Leech * @lport: The lport whose link is down 5708faecddbSChris Leech */ 5718faecddbSChris Leech void __fc_linkdown(struct fc_lport *lport) 5728faecddbSChris Leech { 573ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 574ee35624eSHannes Reinecke 5758faecddbSChris Leech if (lport->link_up) { 5768faecddbSChris Leech lport->link_up = 0; 5778faecddbSChris Leech fc_lport_enter_reset(lport); 5788faecddbSChris Leech lport->tt.fcp_cleanup(lport); 5798faecddbSChris Leech } 5808faecddbSChris Leech } 5818faecddbSChris Leech 5828faecddbSChris Leech /** 58334f42a07SRobert Love * fc_linkdown() - Handler for transport linkdown events 5843a3b42bfSRobert Love * @lport: The local port whose link is down 58542e9a92fSRobert Love */ 58642e9a92fSRobert Love void fc_linkdown(struct fc_lport *lport) 58742e9a92fSRobert Love { 588ce8b5df0SChris Leech printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", 5897b2787ecSRobert Love lport->host->host_no, lport->port_id); 59042e9a92fSRobert Love 5918faecddbSChris Leech mutex_lock(&lport->lp_mutex); 5928faecddbSChris Leech __fc_linkdown(lport); 59342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 59442e9a92fSRobert Love } 59542e9a92fSRobert Love EXPORT_SYMBOL(fc_linkdown); 59642e9a92fSRobert Love 59742e9a92fSRobert Love /** 59834f42a07SRobert Love * fc_fabric_logoff() - Logout of the fabric 5993a3b42bfSRobert Love * @lport: The local port to logoff the fabric 60042e9a92fSRobert Love * 60142e9a92fSRobert Love * Return value: 60242e9a92fSRobert Love * 0 for success, -1 for failure 60334f42a07SRobert Love */ 60442e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lport) 60542e9a92fSRobert Love { 60642e9a92fSRobert Love lport->tt.disc_stop_final(lport); 60742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 6083a3b42bfSRobert Love if (lport->dns_rdata) 609c96c792aSHannes Reinecke fc_rport_logoff(lport->dns_rdata); 610a0fd2e49SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 6115922a957SHannes Reinecke fc_rport_flush_queue(); 612a0fd2e49SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 61342e9a92fSRobert Love fc_lport_enter_logo(lport); 61442e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 615f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 61642e9a92fSRobert Love return 0; 61742e9a92fSRobert Love } 61842e9a92fSRobert Love EXPORT_SYMBOL(fc_fabric_logoff); 61942e9a92fSRobert Love 62042e9a92fSRobert Love /** 6213a3b42bfSRobert Love * fc_lport_destroy() - Unregister a fc_lport 6223a3b42bfSRobert Love * @lport: The local port to unregister 62342e9a92fSRobert Love * 62442e9a92fSRobert Love * Note: 62542e9a92fSRobert Love * exit routine for fc_lport instance 62642e9a92fSRobert Love * clean-up all the allocated memory 62742e9a92fSRobert Love * and free up other system resources. 62842e9a92fSRobert Love * 62934f42a07SRobert Love */ 63042e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lport) 63142e9a92fSRobert Love { 632bbf15669SAbhijeet Joglekar mutex_lock(&lport->lp_mutex); 633b1d9fd55SJoe Eykholt lport->state = LPORT_ST_DISABLED; 634bbf15669SAbhijeet Joglekar lport->link_up = 0; 63542e9a92fSRobert Love lport->tt.frame_send = fc_frame_drop; 636bbf15669SAbhijeet Joglekar mutex_unlock(&lport->lp_mutex); 637bbf15669SAbhijeet Joglekar 63842e9a92fSRobert Love lport->tt.fcp_abort_io(lport); 639e9ba8b42SJoe Eykholt lport->tt.disc_stop_final(lport); 6401f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 641061446a1SVasu Dev cancel_delayed_work_sync(&lport->retry_work); 64270d53b04SJoe Eykholt fc_fc4_del_lport(lport); 64342e9a92fSRobert Love return 0; 64442e9a92fSRobert Love } 64542e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_destroy); 64642e9a92fSRobert Love 64742e9a92fSRobert Love /** 6483a3b42bfSRobert Love * fc_set_mfs() - Set the maximum frame size for a local port 6493a3b42bfSRobert Love * @lport: The local port to set the MFS for 6503a3b42bfSRobert Love * @mfs: The new MFS 65134f42a07SRobert Love */ 65242e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lport, u32 mfs) 65342e9a92fSRobert Love { 65442e9a92fSRobert Love unsigned int old_mfs; 65542e9a92fSRobert Love int rc = -EINVAL; 65642e9a92fSRobert Love 65742e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 65842e9a92fSRobert Love 65942e9a92fSRobert Love old_mfs = lport->mfs; 66042e9a92fSRobert Love 66142e9a92fSRobert Love if (mfs >= FC_MIN_MAX_FRAME) { 66242e9a92fSRobert Love mfs &= ~3; 66342e9a92fSRobert Love if (mfs > FC_MAX_FRAME) 66442e9a92fSRobert Love mfs = FC_MAX_FRAME; 66542e9a92fSRobert Love mfs -= sizeof(struct fc_frame_header); 66642e9a92fSRobert Love lport->mfs = mfs; 66742e9a92fSRobert Love rc = 0; 66842e9a92fSRobert Love } 66942e9a92fSRobert Love 67042e9a92fSRobert Love if (!rc && mfs < old_mfs) 67142e9a92fSRobert Love fc_lport_enter_reset(lport); 67242e9a92fSRobert Love 67342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 67442e9a92fSRobert Love 67542e9a92fSRobert Love return rc; 67642e9a92fSRobert Love } 67742e9a92fSRobert Love EXPORT_SYMBOL(fc_set_mfs); 67842e9a92fSRobert Love 67942e9a92fSRobert Love /** 68034f42a07SRobert Love * fc_lport_disc_callback() - Callback for discovery events 6813a3b42bfSRobert Love * @lport: The local port receiving the event 68242e9a92fSRobert Love * @event: The discovery event 68342e9a92fSRobert Love */ 684c6b21c93SBart Van Assche static void fc_lport_disc_callback(struct fc_lport *lport, 685c6b21c93SBart Van Assche enum fc_disc_event event) 68642e9a92fSRobert Love { 68742e9a92fSRobert Love switch (event) { 68842e9a92fSRobert Love case DISC_EV_SUCCESS: 6897414705eSRobert Love FC_LPORT_DBG(lport, "Discovery succeeded\n"); 69042e9a92fSRobert Love break; 69142e9a92fSRobert Love case DISC_EV_FAILED: 692e6d8a1b0SJoe Eykholt printk(KERN_ERR "host%d: libfc: " 693ce8b5df0SChris Leech "Discovery failed for port (%6.6x)\n", 6947b2787ecSRobert Love lport->host->host_no, lport->port_id); 69542e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 69642e9a92fSRobert Love fc_lport_enter_reset(lport); 69742e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 69842e9a92fSRobert Love break; 69942e9a92fSRobert Love case DISC_EV_NONE: 70042e9a92fSRobert Love WARN_ON(1); 70142e9a92fSRobert Love break; 70242e9a92fSRobert Love } 70342e9a92fSRobert Love } 70442e9a92fSRobert Love 70542e9a92fSRobert Love /** 7064a4db603SLee Jones * fc_lport_enter_ready() - Enter the ready state and start discovery 7073a3b42bfSRobert Love * @lport: The local port that is ready 70842e9a92fSRobert Love */ 70942e9a92fSRobert Love static void fc_lport_enter_ready(struct fc_lport *lport) 71042e9a92fSRobert Love { 711ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 712ee35624eSHannes Reinecke 7137414705eSRobert Love FC_LPORT_DBG(lport, "Entered READY from state %s\n", 7147414705eSRobert Love fc_lport_state(lport)); 71542e9a92fSRobert Love 71642e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_READY); 7178faecddbSChris Leech if (lport->vport) 7188faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); 7198faecddbSChris Leech fc_vports_linkchange(lport); 72042e9a92fSRobert Love 7213a3b42bfSRobert Love if (!lport->ptp_rdata) 72242e9a92fSRobert Love lport->tt.disc_start(fc_lport_disc_callback, lport); 72342e9a92fSRobert Love } 72442e9a92fSRobert Love 72542e9a92fSRobert Love /** 726093bb6a2SJoe Eykholt * fc_lport_set_port_id() - set the local port Port ID 727093bb6a2SJoe Eykholt * @lport: The local port which will have its Port ID set. 728093bb6a2SJoe Eykholt * @port_id: The new port ID. 729093bb6a2SJoe Eykholt * @fp: The frame containing the incoming request, or NULL. 730093bb6a2SJoe Eykholt */ 731093bb6a2SJoe Eykholt static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, 732093bb6a2SJoe Eykholt struct fc_frame *fp) 733093bb6a2SJoe Eykholt { 734ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 735ee35624eSHannes Reinecke 736093bb6a2SJoe Eykholt if (port_id) 737ce8b5df0SChris Leech printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", 738093bb6a2SJoe Eykholt lport->host->host_no, port_id); 739093bb6a2SJoe Eykholt 7407b2787ecSRobert Love lport->port_id = port_id; 7417b2787ecSRobert Love 7427b2787ecSRobert Love /* Update the fc_host */ 743093bb6a2SJoe Eykholt fc_host_port_id(lport->host) = port_id; 7447b2787ecSRobert Love 745093bb6a2SJoe Eykholt if (lport->tt.lport_set_port_id) 746093bb6a2SJoe Eykholt lport->tt.lport_set_port_id(lport, port_id, fp); 747093bb6a2SJoe Eykholt } 748093bb6a2SJoe Eykholt 749093bb6a2SJoe Eykholt /** 7504a4db603SLee Jones * fc_lport_set_local_id() - set the local port Port ID for point-to-multipoint 7513726f358SJoe Eykholt * @lport: The local port which will have its Port ID set. 7523726f358SJoe Eykholt * @port_id: The new port ID. 7533726f358SJoe Eykholt * 7543726f358SJoe Eykholt * Called by the lower-level driver when transport sets the local port_id. 7553726f358SJoe Eykholt * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and 7563726f358SJoe Eykholt * discovery to be skipped. 7573726f358SJoe Eykholt */ 7583726f358SJoe Eykholt void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id) 7593726f358SJoe Eykholt { 7603726f358SJoe Eykholt mutex_lock(&lport->lp_mutex); 7613726f358SJoe Eykholt 7623726f358SJoe Eykholt fc_lport_set_port_id(lport, port_id, NULL); 7633726f358SJoe Eykholt 7643726f358SJoe Eykholt switch (lport->state) { 7653726f358SJoe Eykholt case LPORT_ST_RESET: 7663726f358SJoe Eykholt case LPORT_ST_FLOGI: 7673726f358SJoe Eykholt if (port_id) 7683726f358SJoe Eykholt fc_lport_enter_ready(lport); 7693726f358SJoe Eykholt break; 7703726f358SJoe Eykholt default: 7713726f358SJoe Eykholt break; 7723726f358SJoe Eykholt } 7733726f358SJoe Eykholt mutex_unlock(&lport->lp_mutex); 7743726f358SJoe Eykholt } 7753726f358SJoe Eykholt EXPORT_SYMBOL(fc_lport_set_local_id); 7763726f358SJoe Eykholt 7773726f358SJoe Eykholt /** 77834f42a07SRobert Love * fc_lport_recv_flogi_req() - Receive a FLOGI request 77925985edcSLucas De Marchi * @lport: The local port that received the request 78092261156SJoe Eykholt * @rx_fp: The FLOGI frame 78142e9a92fSRobert Love * 78242e9a92fSRobert Love * A received FLOGI request indicates a point-to-point connection. 78342e9a92fSRobert Love * Accept it with the common service parameters indicating our N port. 78442e9a92fSRobert Love * Set up to do a PLOGI if we have the higher-number WWPN. 78542e9a92fSRobert Love */ 78692261156SJoe Eykholt static void fc_lport_recv_flogi_req(struct fc_lport *lport, 78792261156SJoe Eykholt struct fc_frame *rx_fp) 78842e9a92fSRobert Love { 78942e9a92fSRobert Love struct fc_frame *fp; 79024f089e2SJoe Eykholt struct fc_frame_header *fh; 79142e9a92fSRobert Love struct fc_els_flogi *flp; 79242e9a92fSRobert Love struct fc_els_flogi *new_flp; 79342e9a92fSRobert Love u64 remote_wwpn; 79442e9a92fSRobert Love u32 remote_fid; 79542e9a92fSRobert Love u32 local_fid; 79642e9a92fSRobert Love 797ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 798ee35624eSHannes Reinecke 7997414705eSRobert Love FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", 80042e9a92fSRobert Love fc_lport_state(lport)); 80142e9a92fSRobert Love 802251748a9SJoe Eykholt remote_fid = fc_frame_sid(rx_fp); 80342e9a92fSRobert Love flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); 80442e9a92fSRobert Love if (!flp) 80542e9a92fSRobert Love goto out; 80642e9a92fSRobert Love remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); 80742e9a92fSRobert Love if (remote_wwpn == lport->wwpn) { 808e6d8a1b0SJoe Eykholt printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " 8099f8f3aa6SChris Leech "with same WWPN %16.16llx\n", 810e6d8a1b0SJoe Eykholt lport->host->host_no, remote_wwpn); 81142e9a92fSRobert Love goto out; 81242e9a92fSRobert Love } 8139f8f3aa6SChris Leech FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); 81442e9a92fSRobert Love 81542e9a92fSRobert Love /* 81642e9a92fSRobert Love * XXX what is the right thing to do for FIDs? 81742e9a92fSRobert Love * The originator might expect our S_ID to be 0xfffffe. 81842e9a92fSRobert Love * But if so, both of us could end up with the same FID. 81942e9a92fSRobert Love */ 82042e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_LO; 82142e9a92fSRobert Love if (remote_wwpn < lport->wwpn) { 82242e9a92fSRobert Love local_fid = FC_LOCAL_PTP_FID_HI; 82342e9a92fSRobert Love if (!remote_fid || remote_fid == local_fid) 82442e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_LO; 82542e9a92fSRobert Love } else if (!remote_fid) { 82642e9a92fSRobert Love remote_fid = FC_LOCAL_PTP_FID_HI; 82742e9a92fSRobert Love } 82842e9a92fSRobert Love 829093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, local_fid, rx_fp); 83042e9a92fSRobert Love 83142e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*flp)); 83242e9a92fSRobert Love if (fp) { 83342e9a92fSRobert Love new_flp = fc_frame_payload_get(fp, sizeof(*flp)); 83442e9a92fSRobert Love fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); 83542e9a92fSRobert Love new_flp->fl_cmd = (u8) ELS_LS_ACC; 83642e9a92fSRobert Love 83742e9a92fSRobert Love /* 83842e9a92fSRobert Love * Send the response. If this fails, the originator should 83942e9a92fSRobert Love * repeat the sequence. 84042e9a92fSRobert Love */ 84124f089e2SJoe Eykholt fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); 84224f089e2SJoe Eykholt fh = fc_frame_header_get(fp); 84324f089e2SJoe Eykholt hton24(fh->fh_s_id, local_fid); 84424f089e2SJoe Eykholt hton24(fh->fh_d_id, remote_fid); 84524f089e2SJoe Eykholt lport->tt.frame_send(lport, fp); 84642e9a92fSRobert Love 84742e9a92fSRobert Love } else { 84842e9a92fSRobert Love fc_lport_error(lport, fp); 84942e9a92fSRobert Love } 85042e9a92fSRobert Love fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, 85142e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn)); 85242e9a92fSRobert Love out: 85342e9a92fSRobert Love fc_frame_free(rx_fp); 85442e9a92fSRobert Love } 85542e9a92fSRobert Love 85642e9a92fSRobert Love /** 85796ad8464SJoe Eykholt * fc_lport_recv_els_req() - The generic lport ELS request handler 8583a3b42bfSRobert Love * @lport: The local port that received the request 8593a3b42bfSRobert Love * @fp: The request frame 86042e9a92fSRobert Love * 86142e9a92fSRobert Love * This function will see if the lport handles the request or 86242e9a92fSRobert Love * if an rport should handle the request. 86342e9a92fSRobert Love * 86442e9a92fSRobert Love * Locking Note: This function should not be called with the lport 86525985edcSLucas De Marchi * lock held because it will grab the lock. 86642e9a92fSRobert Love */ 86796ad8464SJoe Eykholt static void fc_lport_recv_els_req(struct fc_lport *lport, 86896ad8464SJoe Eykholt struct fc_frame *fp) 86942e9a92fSRobert Love { 87042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 87142e9a92fSRobert Love 87242e9a92fSRobert Love /* 87342e9a92fSRobert Love * Handle special ELS cases like FLOGI, LOGO, and 87442e9a92fSRobert Love * RSCN here. These don't require a session. 87542e9a92fSRobert Love * Even if we had a session, it might not be ready. 87642e9a92fSRobert Love */ 877e9ba8b42SJoe Eykholt if (!lport->link_up) 878e9ba8b42SJoe Eykholt fc_frame_free(fp); 87996ad8464SJoe Eykholt else { 88042e9a92fSRobert Love /* 88142e9a92fSRobert Love * Check opcode. 88242e9a92fSRobert Love */ 88342e9a92fSRobert Love switch (fc_frame_payload_op(fp)) { 88442e9a92fSRobert Love case ELS_FLOGI: 885a7b12a27SJoe Eykholt if (!lport->point_to_multipoint) 886fcabb09eSJohannes Thumshirn fc_lport_recv_flogi_req(lport, fp); 887fe55e795SMartin Wilck else 888fe55e795SMartin Wilck fc_rport_recv_req(lport, fp); 88942e9a92fSRobert Love break; 89042e9a92fSRobert Love case ELS_LOGO: 891251748a9SJoe Eykholt if (fc_frame_sid(fp) == FC_FID_FLOGI) 892fcabb09eSJohannes Thumshirn fc_lport_recv_logo_req(lport, fp); 893fe55e795SMartin Wilck else 894fe55e795SMartin Wilck fc_rport_recv_req(lport, fp); 89542e9a92fSRobert Love break; 89642e9a92fSRobert Love case ELS_RSCN: 897fcabb09eSJohannes Thumshirn lport->tt.disc_recv_req(lport, fp); 89842e9a92fSRobert Love break; 89942e9a92fSRobert Love case ELS_ECHO: 900fcabb09eSJohannes Thumshirn fc_lport_recv_echo_req(lport, fp); 90142e9a92fSRobert Love break; 90242e9a92fSRobert Love case ELS_RLIR: 903fcabb09eSJohannes Thumshirn fc_lport_recv_rlir_req(lport, fp); 90442e9a92fSRobert Love break; 90542e9a92fSRobert Love case ELS_RNID: 906fcabb09eSJohannes Thumshirn fc_lport_recv_rnid_req(lport, fp); 907fcabb09eSJohannes Thumshirn break; 908fcabb09eSJohannes Thumshirn default: 909fcabb09eSJohannes Thumshirn fc_rport_recv_req(lport, fp); 91042e9a92fSRobert Love break; 91142e9a92fSRobert Love } 91242e9a92fSRobert Love } 91342e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 91442e9a92fSRobert Love } 91542e9a92fSRobert Love 91696ad8464SJoe Eykholt static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len, 91796ad8464SJoe Eykholt const struct fc_els_spp *spp_in, 91896ad8464SJoe Eykholt struct fc_els_spp *spp_out) 91996ad8464SJoe Eykholt { 92096ad8464SJoe Eykholt return FC_SPP_RESP_INVL; 92196ad8464SJoe Eykholt } 92296ad8464SJoe Eykholt 92396ad8464SJoe Eykholt struct fc4_prov fc_lport_els_prov = { 92496ad8464SJoe Eykholt .prli = fc_lport_els_prli, 92596ad8464SJoe Eykholt .recv = fc_lport_recv_els_req, 92696ad8464SJoe Eykholt }; 92796ad8464SJoe Eykholt 92896ad8464SJoe Eykholt /** 929c5cb444cSHannes Reinecke * fc_lport_recv() - The generic lport request handler 93096ad8464SJoe Eykholt * @lport: The lport that received the request 93196ad8464SJoe Eykholt * @fp: The frame the request is in 93296ad8464SJoe Eykholt * 93396ad8464SJoe Eykholt * Locking Note: This function should not be called with the lport 93425985edcSLucas De Marchi * lock held because it may grab the lock. 93596ad8464SJoe Eykholt */ 936c5cb444cSHannes Reinecke void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp) 93796ad8464SJoe Eykholt { 93896ad8464SJoe Eykholt struct fc_frame_header *fh = fc_frame_header_get(fp); 93996ad8464SJoe Eykholt struct fc_seq *sp = fr_seq(fp); 94096ad8464SJoe Eykholt struct fc4_prov *prov; 94196ad8464SJoe Eykholt 94296ad8464SJoe Eykholt /* 94396ad8464SJoe Eykholt * Use RCU read lock and module_lock to be sure module doesn't 94496ad8464SJoe Eykholt * deregister and get unloaded while we're calling it. 94596ad8464SJoe Eykholt * try_module_get() is inlined and accepts a NULL parameter. 94696ad8464SJoe Eykholt * Only ELSes and FCP target ops should come through here. 94796ad8464SJoe Eykholt * The locking is unfortunate, and a better scheme is being sought. 94896ad8464SJoe Eykholt */ 94996ad8464SJoe Eykholt 95096ad8464SJoe Eykholt rcu_read_lock(); 95196ad8464SJoe Eykholt if (fh->fh_type >= FC_FC4_PROV_SIZE) 95296ad8464SJoe Eykholt goto drop; 95396ad8464SJoe Eykholt prov = rcu_dereference(fc_passive_prov[fh->fh_type]); 95496ad8464SJoe Eykholt if (!prov || !try_module_get(prov->module)) 95596ad8464SJoe Eykholt goto drop; 95696ad8464SJoe Eykholt rcu_read_unlock(); 95796ad8464SJoe Eykholt prov->recv(lport, fp); 95896ad8464SJoe Eykholt module_put(prov->module); 95996ad8464SJoe Eykholt return; 96096ad8464SJoe Eykholt drop: 96196ad8464SJoe Eykholt rcu_read_unlock(); 96296ad8464SJoe Eykholt FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type); 96396ad8464SJoe Eykholt fc_frame_free(fp); 964db95fc00SYi Zou if (sp) 965768c72ccSHannes Reinecke fc_exch_done(sp); 96696ad8464SJoe Eykholt } 967c5cb444cSHannes Reinecke EXPORT_SYMBOL(fc_lport_recv); 96896ad8464SJoe Eykholt 96942e9a92fSRobert Love /** 9703a3b42bfSRobert Love * fc_lport_reset() - Reset a local port 9713a3b42bfSRobert Love * @lport: The local port which should be reset 97242e9a92fSRobert Love * 97342e9a92fSRobert Love * Locking Note: This functions should not be called with the 97442e9a92fSRobert Love * lport lock held. 97542e9a92fSRobert Love */ 97642e9a92fSRobert Love int fc_lport_reset(struct fc_lport *lport) 97742e9a92fSRobert Love { 978f7db2c15SSteve Ma cancel_delayed_work_sync(&lport->retry_work); 97942e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 98042e9a92fSRobert Love fc_lport_enter_reset(lport); 98142e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 98242e9a92fSRobert Love return 0; 98342e9a92fSRobert Love } 98442e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_reset); 98542e9a92fSRobert Love 98642e9a92fSRobert Love /** 9873a3b42bfSRobert Love * fc_lport_reset_locked() - Reset the local port w/ the lport lock held 9883a3b42bfSRobert Love * @lport: The local port to be reset 98942e9a92fSRobert Love */ 9901190d925SJoe Eykholt static void fc_lport_reset_locked(struct fc_lport *lport) 99142e9a92fSRobert Love { 992ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 993ee35624eSHannes Reinecke 994a407c593SHannes Reinecke if (lport->dns_rdata) { 995c96c792aSHannes Reinecke fc_rport_logoff(lport->dns_rdata); 996a407c593SHannes Reinecke lport->dns_rdata = NULL; 997a407c593SHannes Reinecke } 99842e9a92fSRobert Love 9992f2ac4a0SJoe Eykholt if (lport->ptp_rdata) { 1000c96c792aSHannes Reinecke fc_rport_logoff(lport->ptp_rdata); 1001944ef968SHannes Reinecke kref_put(&lport->ptp_rdata->kref, fc_rport_destroy); 10023a3b42bfSRobert Love lport->ptp_rdata = NULL; 10032f2ac4a0SJoe Eykholt } 100442e9a92fSRobert Love 100542e9a92fSRobert Love lport->tt.disc_stop(lport); 100642e9a92fSRobert Love 10071f6ff364SAbhijeet Joglekar lport->tt.exch_mgr_reset(lport, 0, 0); 100842e9a92fSRobert Love fc_host_fabric_name(lport->host) = 0; 1009093bb6a2SJoe Eykholt 10103726f358SJoe Eykholt if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up)) 1011093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, 0, NULL); 10121190d925SJoe Eykholt } 101342e9a92fSRobert Love 10141190d925SJoe Eykholt /** 10151190d925SJoe Eykholt * fc_lport_enter_reset() - Reset the local port 10163a3b42bfSRobert Love * @lport: The local port to be reset 10171190d925SJoe Eykholt */ 10181190d925SJoe Eykholt static void fc_lport_enter_reset(struct fc_lport *lport) 10191190d925SJoe Eykholt { 1020ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1021ee35624eSHannes Reinecke 10221190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", 10231190d925SJoe Eykholt fc_lport_state(lport)); 10241190d925SJoe Eykholt 102555a66d3cSVasu Dev if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) 102655a66d3cSVasu Dev return; 102755a66d3cSVasu Dev 10288faecddbSChris Leech if (lport->vport) { 10298faecddbSChris Leech if (lport->link_up) 10308faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); 10318faecddbSChris Leech else 10328faecddbSChris Leech fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); 10338faecddbSChris Leech } 10341190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_RESET); 10359b7d1613SVasu Dev fc_host_post_event(lport->host, fc_get_event_number(), 10369b7d1613SVasu Dev FCH_EVT_LIPRESET, 0); 10378faecddbSChris Leech fc_vports_linkchange(lport); 10381190d925SJoe Eykholt fc_lport_reset_locked(lport); 1039b6e3c840SVasu Dev if (lport->link_up) 104042e9a92fSRobert Love fc_lport_enter_flogi(lport); 104142e9a92fSRobert Love } 104242e9a92fSRobert Love 104342e9a92fSRobert Love /** 10443a3b42bfSRobert Love * fc_lport_enter_disabled() - Disable the local port 10453a3b42bfSRobert Love * @lport: The local port to be reset 10461190d925SJoe Eykholt */ 10471190d925SJoe Eykholt static void fc_lport_enter_disabled(struct fc_lport *lport) 10481190d925SJoe Eykholt { 1049ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1050ee35624eSHannes Reinecke 10511190d925SJoe Eykholt FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", 10521190d925SJoe Eykholt fc_lport_state(lport)); 10531190d925SJoe Eykholt 10541190d925SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 10558faecddbSChris Leech fc_vports_linkchange(lport); 10561190d925SJoe Eykholt fc_lport_reset_locked(lport); 10571190d925SJoe Eykholt } 10581190d925SJoe Eykholt 10591190d925SJoe Eykholt /** 106034f42a07SRobert Love * fc_lport_error() - Handler for any errors 10613a3b42bfSRobert Love * @lport: The local port that the error was on 10623a3b42bfSRobert Love * @fp: The error code encoded in a frame pointer 106342e9a92fSRobert Love * 106442e9a92fSRobert Love * If the error was caused by a resource allocation failure 106542e9a92fSRobert Love * then wait for half a second and retry, otherwise retry 106642e9a92fSRobert Love * after the e_d_tov time. 106742e9a92fSRobert Love */ 106842e9a92fSRobert Love static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) 106942e9a92fSRobert Love { 107042e9a92fSRobert Love unsigned long delay = 0; 10717414705eSRobert Love FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", 1072b20d9bfdSBart Van Assche IS_ERR(fp) ? -PTR_ERR(fp) : 0, fc_lport_state(lport), 107342e9a92fSRobert Love lport->retry_count); 107442e9a92fSRobert Love 10757f985231SBhanu Prakash Gollapudi if (PTR_ERR(fp) == -FC_EX_CLOSED) 10767f985231SBhanu Prakash Gollapudi return; 10777f985231SBhanu Prakash Gollapudi 107842e9a92fSRobert Love /* 10797f985231SBhanu Prakash Gollapudi * Memory allocation failure, or the exchange timed out 10807f985231SBhanu Prakash Gollapudi * or we received LS_RJT. 108142e9a92fSRobert Love * Retry after delay 108242e9a92fSRobert Love */ 108342e9a92fSRobert Love if (lport->retry_count < lport->max_retry_count) { 108442e9a92fSRobert Love lport->retry_count++; 108542e9a92fSRobert Love if (!fp) 108642e9a92fSRobert Love delay = msecs_to_jiffies(500); 108742e9a92fSRobert Love else 108842e9a92fSRobert Love delay = msecs_to_jiffies(lport->e_d_tov); 108942e9a92fSRobert Love 109042e9a92fSRobert Love schedule_delayed_work(&lport->retry_work, delay); 10917f985231SBhanu Prakash Gollapudi } else 109242e9a92fSRobert Love fc_lport_enter_reset(lport); 109342e9a92fSRobert Love } 109442e9a92fSRobert Love 109542e9a92fSRobert Love /** 10967cccc157SChris Leech * fc_lport_ns_resp() - Handle response to a name server 10977cccc157SChris Leech * registration exchange 10987cccc157SChris Leech * @sp: current sequence in exchange 109942e9a92fSRobert Love * @fp: response frame 110042e9a92fSRobert Love * @lp_arg: Fibre Channel host port instance 110142e9a92fSRobert Love * 110242e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 11033a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 110442e9a92fSRobert Love * and then unlock the lport. 110542e9a92fSRobert Love */ 11067cccc157SChris Leech static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, 110742e9a92fSRobert Love void *lp_arg) 110842e9a92fSRobert Love { 110942e9a92fSRobert Love struct fc_lport *lport = lp_arg; 111042e9a92fSRobert Love struct fc_frame_header *fh; 111142e9a92fSRobert Love struct fc_ct_hdr *ct; 111242e9a92fSRobert Love 11137cccc157SChris Leech FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); 1114f657d299SJoe Eykholt 111542e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 111642e9a92fSRobert Love return; 111742e9a92fSRobert Love 111842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 111942e9a92fSRobert Love 1120ab593b18SJoe Eykholt if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { 11217cccc157SChris Leech FC_LPORT_DBG(lport, "Received a name server response, " 11227cccc157SChris Leech "but in state %s\n", fc_lport_state(lport)); 112376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 112476f6804eSAbhijeet Joglekar goto err; 112542e9a92fSRobert Love goto out; 112642e9a92fSRobert Love } 112742e9a92fSRobert Love 112876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 112976f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 113076f6804eSAbhijeet Joglekar goto err; 113176f6804eSAbhijeet Joglekar } 113276f6804eSAbhijeet Joglekar 113342e9a92fSRobert Love fh = fc_frame_header_get(fp); 113442e9a92fSRobert Love ct = fc_frame_payload_get(fp, sizeof(*ct)); 113542e9a92fSRobert Love 113642e9a92fSRobert Love if (fh && ct && fh->fh_type == FC_TYPE_CT && 113742e9a92fSRobert Love ct->ct_fs_type == FC_FST_DIR && 113842e9a92fSRobert Love ct->ct_fs_subtype == FC_NS_SUBTYPE && 113942e9a92fSRobert Love ntohs(ct->ct_cmd) == FC_FS_ACC) 11407cccc157SChris Leech switch (lport->state) { 11417cccc157SChris Leech case LPORT_ST_RNN_ID: 1142c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); 11437cccc157SChris Leech break; 11447cccc157SChris Leech case LPORT_ST_RSNN_NN: 1145c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); 11467cccc157SChris Leech break; 11477cccc157SChris Leech case LPORT_ST_RSPN_ID: 1148c914f7d1SChris Leech fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 11497cccc157SChris Leech break; 11507cccc157SChris Leech case LPORT_ST_RFT_ID: 1151ab593b18SJoe Eykholt fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); 1152ab593b18SJoe Eykholt break; 1153ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1154d78c317fSNeerav Parikh if (lport->fdmi_enabled) 1155d78c317fSNeerav Parikh fc_lport_enter_fdmi(lport); 1156d78c317fSNeerav Parikh else 11577cccc157SChris Leech fc_lport_enter_scr(lport); 11587cccc157SChris Leech break; 11597cccc157SChris Leech default: 11607cccc157SChris Leech /* should have already been caught by state checks */ 11617cccc157SChris Leech break; 11627cccc157SChris Leech } 1163c9c7bd7aSChris Leech else 1164c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1165c9c7bd7aSChris Leech out: 1166c9c7bd7aSChris Leech fc_frame_free(fp); 1167c9c7bd7aSChris Leech err: 1168c9c7bd7aSChris Leech mutex_unlock(&lport->lp_mutex); 1169c9c7bd7aSChris Leech } 1170c9c7bd7aSChris Leech 1171c9c7bd7aSChris Leech /** 1172d78c317fSNeerav Parikh * fc_lport_ms_resp() - Handle response to a management server 1173d78c317fSNeerav Parikh * exchange 1174d78c317fSNeerav Parikh * @sp: current sequence in exchange 1175d78c317fSNeerav Parikh * @fp: response frame 1176d78c317fSNeerav Parikh * @lp_arg: Fibre Channel host port instance 1177d78c317fSNeerav Parikh * 1178d78c317fSNeerav Parikh * Locking Note: This function will be called without the lport lock 1179d78c317fSNeerav Parikh * held, but it will lock, call an _enter_* function or fc_lport_error() 1180d78c317fSNeerav Parikh * and then unlock the lport. 1181d78c317fSNeerav Parikh */ 1182d78c317fSNeerav Parikh static void fc_lport_ms_resp(struct fc_seq *sp, struct fc_frame *fp, 1183d78c317fSNeerav Parikh void *lp_arg) 1184d78c317fSNeerav Parikh { 1185d78c317fSNeerav Parikh struct fc_lport *lport = lp_arg; 1186d78c317fSNeerav Parikh struct fc_frame_header *fh; 1187d78c317fSNeerav Parikh struct fc_ct_hdr *ct; 1188d78c317fSNeerav Parikh 1189d78c317fSNeerav Parikh FC_LPORT_DBG(lport, "Received a ms %s\n", fc_els_resp_type(fp)); 1190d78c317fSNeerav Parikh 1191d78c317fSNeerav Parikh if (fp == ERR_PTR(-FC_EX_CLOSED)) 1192d78c317fSNeerav Parikh return; 1193d78c317fSNeerav Parikh 1194d78c317fSNeerav Parikh mutex_lock(&lport->lp_mutex); 1195d78c317fSNeerav Parikh 1196d78c317fSNeerav Parikh if (lport->state < LPORT_ST_RHBA || lport->state > LPORT_ST_DPRT) { 1197d78c317fSNeerav Parikh FC_LPORT_DBG(lport, "Received a management server response, " 1198d78c317fSNeerav Parikh "but in state %s\n", fc_lport_state(lport)); 1199d78c317fSNeerav Parikh if (IS_ERR(fp)) 1200d78c317fSNeerav Parikh goto err; 1201d78c317fSNeerav Parikh goto out; 1202d78c317fSNeerav Parikh } 1203d78c317fSNeerav Parikh 1204d78c317fSNeerav Parikh if (IS_ERR(fp)) { 1205d78c317fSNeerav Parikh fc_lport_error(lport, fp); 1206d78c317fSNeerav Parikh goto err; 1207d78c317fSNeerav Parikh } 1208d78c317fSNeerav Parikh 1209d78c317fSNeerav Parikh fh = fc_frame_header_get(fp); 1210d78c317fSNeerav Parikh ct = fc_frame_payload_get(fp, sizeof(*ct)); 1211d78c317fSNeerav Parikh 1212d78c317fSNeerav Parikh if (fh && ct && fh->fh_type == FC_TYPE_CT && 1213d78c317fSNeerav Parikh ct->ct_fs_type == FC_FST_MGMT && 1214d78c317fSNeerav Parikh ct->ct_fs_subtype == FC_FDMI_SUBTYPE) { 1215d78c317fSNeerav Parikh FC_LPORT_DBG(lport, "Received a management server response, " 1216d78c317fSNeerav Parikh "reason=%d explain=%d\n", 1217d78c317fSNeerav Parikh ct->ct_reason, 1218d78c317fSNeerav Parikh ct->ct_explan); 1219d78c317fSNeerav Parikh 1220d78c317fSNeerav Parikh switch (lport->state) { 1221d78c317fSNeerav Parikh case LPORT_ST_RHBA: 1222d78c317fSNeerav Parikh if (ntohs(ct->ct_cmd) == FC_FS_ACC) 1223d78c317fSNeerav Parikh fc_lport_enter_ms(lport, LPORT_ST_RPA); 1224d78c317fSNeerav Parikh else /* Error Skip RPA */ 1225d78c317fSNeerav Parikh fc_lport_enter_scr(lport); 1226d78c317fSNeerav Parikh break; 1227d78c317fSNeerav Parikh case LPORT_ST_RPA: 1228d78c317fSNeerav Parikh fc_lport_enter_scr(lport); 1229d78c317fSNeerav Parikh break; 1230d78c317fSNeerav Parikh case LPORT_ST_DPRT: 1231d78c317fSNeerav Parikh fc_lport_enter_ms(lport, LPORT_ST_RHBA); 1232d78c317fSNeerav Parikh break; 1233d78c317fSNeerav Parikh case LPORT_ST_DHBA: 1234d78c317fSNeerav Parikh fc_lport_enter_ms(lport, LPORT_ST_DPRT); 1235d78c317fSNeerav Parikh break; 1236d78c317fSNeerav Parikh default: 1237d78c317fSNeerav Parikh /* should have already been caught by state checks */ 1238d78c317fSNeerav Parikh break; 1239d78c317fSNeerav Parikh } 1240d78c317fSNeerav Parikh } else { 1241d78c317fSNeerav Parikh /* Invalid Frame? */ 1242d78c317fSNeerav Parikh fc_lport_error(lport, fp); 1243d78c317fSNeerav Parikh } 1244d78c317fSNeerav Parikh out: 1245d78c317fSNeerav Parikh fc_frame_free(fp); 1246d78c317fSNeerav Parikh err: 1247d78c317fSNeerav Parikh mutex_unlock(&lport->lp_mutex); 1248d78c317fSNeerav Parikh } 1249d78c317fSNeerav Parikh 1250d78c317fSNeerav Parikh /** 125134f42a07SRobert Love * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request 125242e9a92fSRobert Love * @sp: current sequence in SCR exchange 125342e9a92fSRobert Love * @fp: response frame 125442e9a92fSRobert Love * @lp_arg: Fibre Channel lport port instance that sent the registration request 125542e9a92fSRobert Love * 125642e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 125742e9a92fSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error 125842e9a92fSRobert Love * and then unlock the lport. 125942e9a92fSRobert Love */ 126042e9a92fSRobert Love static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, 126142e9a92fSRobert Love void *lp_arg) 126242e9a92fSRobert Love { 126342e9a92fSRobert Love struct fc_lport *lport = lp_arg; 126442e9a92fSRobert Love u8 op; 126542e9a92fSRobert Love 1266f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); 1267f657d299SJoe Eykholt 126842e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 126942e9a92fSRobert Love return; 127042e9a92fSRobert Love 127142e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 127242e9a92fSRobert Love 127342e9a92fSRobert Love if (lport->state != LPORT_ST_SCR) { 12747414705eSRobert Love FC_LPORT_DBG(lport, "Received a SCR response, but in state " 12757414705eSRobert Love "%s\n", fc_lport_state(lport)); 127676f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 127776f6804eSAbhijeet Joglekar goto err; 127842e9a92fSRobert Love goto out; 127942e9a92fSRobert Love } 128042e9a92fSRobert Love 128176f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 128276f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 128376f6804eSAbhijeet Joglekar goto err; 128476f6804eSAbhijeet Joglekar } 128576f6804eSAbhijeet Joglekar 128642e9a92fSRobert Love op = fc_frame_payload_op(fp); 128742e9a92fSRobert Love if (op == ELS_LS_ACC) 128842e9a92fSRobert Love fc_lport_enter_ready(lport); 128942e9a92fSRobert Love else 129042e9a92fSRobert Love fc_lport_error(lport, fp); 129142e9a92fSRobert Love 129242e9a92fSRobert Love out: 129342e9a92fSRobert Love fc_frame_free(fp); 129442e9a92fSRobert Love err: 129542e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 129642e9a92fSRobert Love } 129742e9a92fSRobert Love 129842e9a92fSRobert Love /** 12993a3b42bfSRobert Love * fc_lport_enter_scr() - Send a SCR (State Change Register) request 13003a3b42bfSRobert Love * @lport: The local port to register for state changes 130142e9a92fSRobert Love */ 130242e9a92fSRobert Love static void fc_lport_enter_scr(struct fc_lport *lport) 130342e9a92fSRobert Love { 130442e9a92fSRobert Love struct fc_frame *fp; 130542e9a92fSRobert Love 1306ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1307ee35624eSHannes Reinecke 13087414705eSRobert Love FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", 13097414705eSRobert Love fc_lport_state(lport)); 131042e9a92fSRobert Love 131142e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_SCR); 131242e9a92fSRobert Love 131342e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); 131442e9a92fSRobert Love if (!fp) { 131542e9a92fSRobert Love fc_lport_error(lport, fp); 131642e9a92fSRobert Love return; 131742e9a92fSRobert Love } 131842e9a92fSRobert Love 1319a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, 1320b94f8951SJoe Eykholt fc_lport_scr_resp, lport, 1321b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 13228f550f93SChris Leech fc_lport_error(lport, NULL); 132342e9a92fSRobert Love } 132442e9a92fSRobert Love 132542e9a92fSRobert Love /** 1326c914f7d1SChris Leech * fc_lport_enter_ns() - register some object with the name server 132742e9a92fSRobert Love * @lport: Fibre Channel local port to register 13289865a04dSLee Jones * @state: Local port state 132942e9a92fSRobert Love */ 1330c914f7d1SChris Leech static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) 133142e9a92fSRobert Love { 133242e9a92fSRobert Love struct fc_frame *fp; 1333c914f7d1SChris Leech enum fc_ns_req cmd; 1334c914f7d1SChris Leech int size = sizeof(struct fc_ct_hdr); 1335c914f7d1SChris Leech size_t len; 133642e9a92fSRobert Love 1337ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1338ee35624eSHannes Reinecke 1339c914f7d1SChris Leech FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1340c914f7d1SChris Leech fc_lport_state_names[state], 13417414705eSRobert Love fc_lport_state(lport)); 134242e9a92fSRobert Love 1343c914f7d1SChris Leech fc_lport_state_enter(lport, state); 134442e9a92fSRobert Love 1345c914f7d1SChris Leech switch (state) { 1346c914f7d1SChris Leech case LPORT_ST_RNN_ID: 1347c914f7d1SChris Leech cmd = FC_NS_RNN_ID; 1348c914f7d1SChris Leech size += sizeof(struct fc_ns_rn_id); 134942e9a92fSRobert Love break; 1350c914f7d1SChris Leech case LPORT_ST_RSNN_NN: 1351c9866a54SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1352c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1353c914f7d1SChris Leech if (!len) 1354c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1355c914f7d1SChris Leech cmd = FC_NS_RSNN_NN; 1356c914f7d1SChris Leech size += sizeof(struct fc_ns_rsnn) + len; 1357c914f7d1SChris Leech break; 1358c914f7d1SChris Leech case LPORT_ST_RSPN_ID: 13595baa17c3SChris Leech len = strnlen(fc_host_symbolic_name(lport->host), 255); 1360c914f7d1SChris Leech /* if there is no symbolic name, skip to RFT_ID */ 1361c914f7d1SChris Leech if (!len) 1362c914f7d1SChris Leech return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); 1363c914f7d1SChris Leech cmd = FC_NS_RSPN_ID; 1364c914f7d1SChris Leech size += sizeof(struct fc_ns_rspn) + len; 1365c914f7d1SChris Leech break; 1366c914f7d1SChris Leech case LPORT_ST_RFT_ID: 1367c914f7d1SChris Leech cmd = FC_NS_RFT_ID; 1368c914f7d1SChris Leech size += sizeof(struct fc_ns_rft); 1369c914f7d1SChris Leech break; 1370ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1371ab593b18SJoe Eykholt cmd = FC_NS_RFF_ID; 1372ab593b18SJoe Eykholt size += sizeof(struct fc_ns_rff_id); 1373ab593b18SJoe Eykholt break; 1374c914f7d1SChris Leech default: 1375c914f7d1SChris Leech fc_lport_error(lport, NULL); 1376c914f7d1SChris Leech return; 1377c914f7d1SChris Leech } 1378c914f7d1SChris Leech 1379c914f7d1SChris Leech fp = fc_frame_alloc(lport, size); 13805baa17c3SChris Leech if (!fp) { 13815baa17c3SChris Leech fc_lport_error(lport, fp); 13825baa17c3SChris Leech return; 13835baa17c3SChris Leech } 13845baa17c3SChris Leech 1385c914f7d1SChris Leech if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, 13867cccc157SChris Leech fc_lport_ns_resp, 1387b94f8951SJoe Eykholt lport, 3 * lport->r_a_tov)) 1388c9c7bd7aSChris Leech fc_lport_error(lport, fp); 1389c9c7bd7aSChris Leech } 1390c9c7bd7aSChris Leech 139142e9a92fSRobert Love static struct fc_rport_operations fc_lport_rport_ops = { 139242e9a92fSRobert Love .event_callback = fc_lport_rport_callback, 139342e9a92fSRobert Love }; 139442e9a92fSRobert Love 139542e9a92fSRobert Love /** 13964a4db603SLee Jones * fc_lport_enter_dns() - Create a fc_rport for the name server 13973a3b42bfSRobert Love * @lport: The local port requesting a remote port for the name server 139842e9a92fSRobert Love */ 139942e9a92fSRobert Love static void fc_lport_enter_dns(struct fc_lport *lport) 140042e9a92fSRobert Love { 1401ab28f1fdSJoe Eykholt struct fc_rport_priv *rdata; 140242e9a92fSRobert Love 1403ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1404ee35624eSHannes Reinecke 14057414705eSRobert Love FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", 14067414705eSRobert Love fc_lport_state(lport)); 140742e9a92fSRobert Love 140842e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_DNS); 140942e9a92fSRobert Love 141048f00902SJoe Eykholt mutex_lock(&lport->disc.disc_mutex); 14112580064bSHannes Reinecke rdata = fc_rport_create(lport, FC_FID_DIR_SERV); 141248f00902SJoe Eykholt mutex_unlock(&lport->disc.disc_mutex); 14139fb9d328SJoe Eykholt if (!rdata) 141442e9a92fSRobert Love goto err; 141542e9a92fSRobert Love 141642e9a92fSRobert Love rdata->ops = &fc_lport_rport_ops; 141705d7d3b0SHannes Reinecke fc_rport_login(rdata); 141842e9a92fSRobert Love return; 141942e9a92fSRobert Love 142042e9a92fSRobert Love err: 142142e9a92fSRobert Love fc_lport_error(lport, NULL); 142242e9a92fSRobert Love } 142342e9a92fSRobert Love 142442e9a92fSRobert Love /** 1425d78c317fSNeerav Parikh * fc_lport_enter_ms() - management server commands 1426d78c317fSNeerav Parikh * @lport: Fibre Channel local port to register 14279865a04dSLee Jones * @state: Local port state 1428d78c317fSNeerav Parikh */ 1429d78c317fSNeerav Parikh static void fc_lport_enter_ms(struct fc_lport *lport, enum fc_lport_state state) 1430d78c317fSNeerav Parikh { 1431d78c317fSNeerav Parikh struct fc_frame *fp; 1432d78c317fSNeerav Parikh enum fc_fdmi_req cmd; 1433d78c317fSNeerav Parikh int size = sizeof(struct fc_ct_hdr); 1434d78c317fSNeerav Parikh size_t len; 1435d78c317fSNeerav Parikh int numattrs; 1436d78c317fSNeerav Parikh 1437ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1438ee35624eSHannes Reinecke 1439d78c317fSNeerav Parikh FC_LPORT_DBG(lport, "Entered %s state from %s state\n", 1440d78c317fSNeerav Parikh fc_lport_state_names[state], 1441d78c317fSNeerav Parikh fc_lport_state(lport)); 1442d78c317fSNeerav Parikh 1443d78c317fSNeerav Parikh fc_lport_state_enter(lport, state); 1444d78c317fSNeerav Parikh 1445d78c317fSNeerav Parikh switch (state) { 1446d78c317fSNeerav Parikh case LPORT_ST_RHBA: 1447d78c317fSNeerav Parikh cmd = FC_FDMI_RHBA; 1448d78c317fSNeerav Parikh /* Number of HBA Attributes */ 1449d78c317fSNeerav Parikh numattrs = 10; 1450d78c317fSNeerav Parikh len = sizeof(struct fc_fdmi_rhba); 1451d78c317fSNeerav Parikh len -= sizeof(struct fc_fdmi_attr_entry); 1452d78c317fSNeerav Parikh len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN); 1453d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_NODENAME_LEN; 1454d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_MANUFACTURER_LEN; 1455d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN; 1456d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_MODEL_LEN; 1457d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_MODELDESCR_LEN; 1458d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN; 1459d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN; 1460d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN; 1461d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN; 1462d78c317fSNeerav Parikh len += FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN; 1463d78c317fSNeerav Parikh 1464d78c317fSNeerav Parikh size += len; 1465d78c317fSNeerav Parikh break; 1466d78c317fSNeerav Parikh case LPORT_ST_RPA: 1467d78c317fSNeerav Parikh cmd = FC_FDMI_RPA; 1468d78c317fSNeerav Parikh /* Number of Port Attributes */ 1469d78c317fSNeerav Parikh numattrs = 6; 1470d78c317fSNeerav Parikh len = sizeof(struct fc_fdmi_rpa); 1471d78c317fSNeerav Parikh len -= sizeof(struct fc_fdmi_attr_entry); 1472d78c317fSNeerav Parikh len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN); 1473d78c317fSNeerav Parikh len += FC_FDMI_PORT_ATTR_FC4TYPES_LEN; 1474d78c317fSNeerav Parikh len += FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN; 1475d78c317fSNeerav Parikh len += FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN; 1476d78c317fSNeerav Parikh len += FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN; 1477d78c317fSNeerav Parikh len += FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN; 1478d78c317fSNeerav Parikh len += FC_FDMI_PORT_ATTR_HOSTNAME_LEN; 1479d78c317fSNeerav Parikh 1480d78c317fSNeerav Parikh size += len; 1481d78c317fSNeerav Parikh break; 1482d78c317fSNeerav Parikh case LPORT_ST_DPRT: 1483d78c317fSNeerav Parikh cmd = FC_FDMI_DPRT; 1484d78c317fSNeerav Parikh len = sizeof(struct fc_fdmi_dprt); 1485d78c317fSNeerav Parikh size += len; 1486d78c317fSNeerav Parikh break; 1487d78c317fSNeerav Parikh case LPORT_ST_DHBA: 1488d78c317fSNeerav Parikh cmd = FC_FDMI_DHBA; 1489d78c317fSNeerav Parikh len = sizeof(struct fc_fdmi_dhba); 1490d78c317fSNeerav Parikh size += len; 1491d78c317fSNeerav Parikh break; 1492d78c317fSNeerav Parikh default: 1493d78c317fSNeerav Parikh fc_lport_error(lport, NULL); 1494d78c317fSNeerav Parikh return; 1495d78c317fSNeerav Parikh } 1496d78c317fSNeerav Parikh 1497d78c317fSNeerav Parikh FC_LPORT_DBG(lport, "Cmd=0x%x Len %d size %d\n", 1498d78c317fSNeerav Parikh cmd, (int)len, size); 1499d78c317fSNeerav Parikh fp = fc_frame_alloc(lport, size); 1500d78c317fSNeerav Parikh if (!fp) { 1501d78c317fSNeerav Parikh fc_lport_error(lport, fp); 1502d78c317fSNeerav Parikh return; 1503d78c317fSNeerav Parikh } 1504d78c317fSNeerav Parikh 1505d78c317fSNeerav Parikh if (!lport->tt.elsct_send(lport, FC_FID_MGMT_SERV, fp, cmd, 1506d78c317fSNeerav Parikh fc_lport_ms_resp, 1507d78c317fSNeerav Parikh lport, 3 * lport->r_a_tov)) 1508d78c317fSNeerav Parikh fc_lport_error(lport, fp); 1509d78c317fSNeerav Parikh } 1510d78c317fSNeerav Parikh 1511d78c317fSNeerav Parikh /** 15124a4db603SLee Jones * fc_lport_enter_fdmi() - Create a fc_rport for the management server 1513d78c317fSNeerav Parikh * @lport: The local port requesting a remote port for the management server 1514d78c317fSNeerav Parikh */ 1515d78c317fSNeerav Parikh static void fc_lport_enter_fdmi(struct fc_lport *lport) 1516d78c317fSNeerav Parikh { 1517d78c317fSNeerav Parikh struct fc_rport_priv *rdata; 1518d78c317fSNeerav Parikh 1519ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1520ee35624eSHannes Reinecke 1521d78c317fSNeerav Parikh FC_LPORT_DBG(lport, "Entered FDMI state from %s state\n", 1522d78c317fSNeerav Parikh fc_lport_state(lport)); 1523d78c317fSNeerav Parikh 1524d78c317fSNeerav Parikh fc_lport_state_enter(lport, LPORT_ST_FDMI); 1525d78c317fSNeerav Parikh 1526d78c317fSNeerav Parikh mutex_lock(&lport->disc.disc_mutex); 15272580064bSHannes Reinecke rdata = fc_rport_create(lport, FC_FID_MGMT_SERV); 1528d78c317fSNeerav Parikh mutex_unlock(&lport->disc.disc_mutex); 1529d78c317fSNeerav Parikh if (!rdata) 1530d78c317fSNeerav Parikh goto err; 1531d78c317fSNeerav Parikh 1532d78c317fSNeerav Parikh rdata->ops = &fc_lport_rport_ops; 153305d7d3b0SHannes Reinecke fc_rport_login(rdata); 1534d78c317fSNeerav Parikh return; 1535d78c317fSNeerav Parikh 1536d78c317fSNeerav Parikh err: 1537d78c317fSNeerav Parikh fc_lport_error(lport, NULL); 1538d78c317fSNeerav Parikh } 1539d78c317fSNeerav Parikh 1540d78c317fSNeerav Parikh /** 15413a3b42bfSRobert Love * fc_lport_timeout() - Handler for the retry_work timer 15423a3b42bfSRobert Love * @work: The work struct of the local port 154342e9a92fSRobert Love */ 154442e9a92fSRobert Love static void fc_lport_timeout(struct work_struct *work) 154542e9a92fSRobert Love { 154642e9a92fSRobert Love struct fc_lport *lport = 154742e9a92fSRobert Love container_of(work, struct fc_lport, 154842e9a92fSRobert Love retry_work.work); 154942e9a92fSRobert Love 155042e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 155142e9a92fSRobert Love 155242e9a92fSRobert Love switch (lport->state) { 1553b1d9fd55SJoe Eykholt case LPORT_ST_DISABLED: 155442e9a92fSRobert Love break; 155522655ac2SJoe Eykholt case LPORT_ST_READY: 155622655ac2SJoe Eykholt break; 155722655ac2SJoe Eykholt case LPORT_ST_RESET: 155822655ac2SJoe Eykholt break; 155942e9a92fSRobert Love case LPORT_ST_FLOGI: 156042e9a92fSRobert Love fc_lport_enter_flogi(lport); 156142e9a92fSRobert Love break; 156242e9a92fSRobert Love case LPORT_ST_DNS: 156342e9a92fSRobert Love fc_lport_enter_dns(lport); 156442e9a92fSRobert Love break; 1565c9c7bd7aSChris Leech case LPORT_ST_RNN_ID: 15665baa17c3SChris Leech case LPORT_ST_RSNN_NN: 1567c9866a54SChris Leech case LPORT_ST_RSPN_ID: 156842e9a92fSRobert Love case LPORT_ST_RFT_ID: 1569ab593b18SJoe Eykholt case LPORT_ST_RFF_ID: 1570c914f7d1SChris Leech fc_lport_enter_ns(lport, lport->state); 157142e9a92fSRobert Love break; 1572d78c317fSNeerav Parikh case LPORT_ST_FDMI: 1573d78c317fSNeerav Parikh fc_lport_enter_fdmi(lport); 1574d78c317fSNeerav Parikh break; 1575d78c317fSNeerav Parikh case LPORT_ST_RHBA: 1576d78c317fSNeerav Parikh case LPORT_ST_RPA: 1577d78c317fSNeerav Parikh case LPORT_ST_DHBA: 1578d78c317fSNeerav Parikh case LPORT_ST_DPRT: 1579ac166d2fSVasu Dev FC_LPORT_DBG(lport, "Skipping lport state %s to SCR\n", 1580ac166d2fSVasu Dev fc_lport_state(lport)); 1581df561f66SGustavo A. R. Silva fallthrough; 158242e9a92fSRobert Love case LPORT_ST_SCR: 158342e9a92fSRobert Love fc_lport_enter_scr(lport); 158442e9a92fSRobert Love break; 158542e9a92fSRobert Love case LPORT_ST_LOGO: 158642e9a92fSRobert Love fc_lport_enter_logo(lport); 158742e9a92fSRobert Love break; 158842e9a92fSRobert Love } 158942e9a92fSRobert Love 159042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 159142e9a92fSRobert Love } 159242e9a92fSRobert Love 159342e9a92fSRobert Love /** 159434f42a07SRobert Love * fc_lport_logo_resp() - Handle response to LOGO request 15953a3b42bfSRobert Love * @sp: The sequence that the LOGO was on 15963a3b42bfSRobert Love * @fp: The LOGO frame 15973a3b42bfSRobert Love * @lp_arg: The lport port that received the LOGO request 159842e9a92fSRobert Love * 159942e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 16003a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 160142e9a92fSRobert Love * and then unlock the lport. 160242e9a92fSRobert Love */ 160311b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, 160442e9a92fSRobert Love void *lp_arg) 160542e9a92fSRobert Love { 160642e9a92fSRobert Love struct fc_lport *lport = lp_arg; 160742e9a92fSRobert Love u8 op; 160842e9a92fSRobert Love 1609f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); 1610f657d299SJoe Eykholt 161142e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 161242e9a92fSRobert Love return; 161342e9a92fSRobert Love 161442e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 161542e9a92fSRobert Love 161642e9a92fSRobert Love if (lport->state != LPORT_ST_LOGO) { 16177414705eSRobert Love FC_LPORT_DBG(lport, "Received a LOGO response, but in state " 16187414705eSRobert Love "%s\n", fc_lport_state(lport)); 161976f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 162076f6804eSAbhijeet Joglekar goto err; 162142e9a92fSRobert Love goto out; 162242e9a92fSRobert Love } 162342e9a92fSRobert Love 162476f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 162576f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 162676f6804eSAbhijeet Joglekar goto err; 162776f6804eSAbhijeet Joglekar } 162876f6804eSAbhijeet Joglekar 162942e9a92fSRobert Love op = fc_frame_payload_op(fp); 163042e9a92fSRobert Love if (op == ELS_LS_ACC) 16311190d925SJoe Eykholt fc_lport_enter_disabled(lport); 163242e9a92fSRobert Love else 163342e9a92fSRobert Love fc_lport_error(lport, fp); 163442e9a92fSRobert Love 163542e9a92fSRobert Love out: 163642e9a92fSRobert Love fc_frame_free(fp); 163742e9a92fSRobert Love err: 163842e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 163942e9a92fSRobert Love } 164011b56188SChris Leech EXPORT_SYMBOL(fc_lport_logo_resp); 164142e9a92fSRobert Love 164242e9a92fSRobert Love /** 16434a4db603SLee Jones * fc_lport_enter_logo() - Logout of the fabric 16443a3b42bfSRobert Love * @lport: The local port to be logged out 164542e9a92fSRobert Love */ 164642e9a92fSRobert Love static void fc_lport_enter_logo(struct fc_lport *lport) 164742e9a92fSRobert Love { 164842e9a92fSRobert Love struct fc_frame *fp; 164942e9a92fSRobert Love struct fc_els_logo *logo; 165042e9a92fSRobert Love 1651ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1652ee35624eSHannes Reinecke 16537414705eSRobert Love FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", 16547414705eSRobert Love fc_lport_state(lport)); 165542e9a92fSRobert Love 165642e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_LOGO); 16578faecddbSChris Leech fc_vports_linkchange(lport); 165842e9a92fSRobert Love 165942e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(*logo)); 166042e9a92fSRobert Love if (!fp) { 166142e9a92fSRobert Love fc_lport_error(lport, fp); 166242e9a92fSRobert Love return; 166342e9a92fSRobert Love } 166442e9a92fSRobert Love 1665a46f327aSJoe Eykholt if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, 1666b94f8951SJoe Eykholt fc_lport_logo_resp, lport, 1667b94f8951SJoe Eykholt 2 * lport->r_a_tov)) 16688f550f93SChris Leech fc_lport_error(lport, NULL); 166942e9a92fSRobert Love } 167042e9a92fSRobert Love 167142e9a92fSRobert Love /** 167234f42a07SRobert Love * fc_lport_flogi_resp() - Handle response to FLOGI request 16733a3b42bfSRobert Love * @sp: The sequence that the FLOGI was on 16743a3b42bfSRobert Love * @fp: The FLOGI response frame 16753a3b42bfSRobert Love * @lp_arg: The lport port that received the FLOGI response 167642e9a92fSRobert Love * 167742e9a92fSRobert Love * Locking Note: This function will be called without the lport lock 16783a3b42bfSRobert Love * held, but it will lock, call an _enter_* function or fc_lport_error() 167942e9a92fSRobert Love * and then unlock the lport. 168042e9a92fSRobert Love */ 168111b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, 168242e9a92fSRobert Love void *lp_arg) 168342e9a92fSRobert Love { 168442e9a92fSRobert Love struct fc_lport *lport = lp_arg; 1685907c07d4SVasu Dev struct fc_frame_header *fh; 168642e9a92fSRobert Love struct fc_els_flogi *flp; 168742e9a92fSRobert Love u32 did; 168842e9a92fSRobert Love u16 csp_flags; 168942e9a92fSRobert Love unsigned int r_a_tov; 169042e9a92fSRobert Love unsigned int e_d_tov; 169142e9a92fSRobert Love u16 mfs; 169242e9a92fSRobert Love 1693f657d299SJoe Eykholt FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); 1694f657d299SJoe Eykholt 169542e9a92fSRobert Love if (fp == ERR_PTR(-FC_EX_CLOSED)) 169642e9a92fSRobert Love return; 169742e9a92fSRobert Love 169842e9a92fSRobert Love mutex_lock(&lport->lp_mutex); 169942e9a92fSRobert Love 170042e9a92fSRobert Love if (lport->state != LPORT_ST_FLOGI) { 17017414705eSRobert Love FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " 17027414705eSRobert Love "%s\n", fc_lport_state(lport)); 170376f6804eSAbhijeet Joglekar if (IS_ERR(fp)) 170476f6804eSAbhijeet Joglekar goto err; 170542e9a92fSRobert Love goto out; 170642e9a92fSRobert Love } 170742e9a92fSRobert Love 170876f6804eSAbhijeet Joglekar if (IS_ERR(fp)) { 170976f6804eSAbhijeet Joglekar fc_lport_error(lport, fp); 171076f6804eSAbhijeet Joglekar goto err; 171176f6804eSAbhijeet Joglekar } 171276f6804eSAbhijeet Joglekar 1713907c07d4SVasu Dev fh = fc_frame_header_get(fp); 1714251748a9SJoe Eykholt did = fc_frame_did(fp); 1715907c07d4SVasu Dev if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 || 1716907c07d4SVasu Dev fc_frame_payload_op(fp) != ELS_LS_ACC) { 1717907c07d4SVasu Dev FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n"); 1718907c07d4SVasu Dev fc_lport_error(lport, fp); 17195d8fc4a9SMing Lu goto out; 1720907c07d4SVasu Dev } 1721907c07d4SVasu Dev 172242e9a92fSRobert Love flp = fc_frame_payload_get(fp, sizeof(*flp)); 1723907c07d4SVasu Dev if (!flp) { 1724907c07d4SVasu Dev FC_LPORT_DBG(lport, "FLOGI bad response\n"); 1725907c07d4SVasu Dev fc_lport_error(lport, fp); 17265d8fc4a9SMing Lu goto out; 1727907c07d4SVasu Dev } 1728907c07d4SVasu Dev 172942e9a92fSRobert Love mfs = ntohs(flp->fl_csp.sp_bb_data) & 173042e9a92fSRobert Love FC_SP_BB_DATA_MASK; 173193f90e51SVasu Dev 173293f90e51SVasu Dev if (mfs < FC_SP_MIN_MAX_PAYLOAD || mfs > FC_SP_MAX_MAX_PAYLOAD) { 173373d67aa4SVasu Dev FC_LPORT_DBG(lport, "FLOGI bad mfs:%hu response, " 1734*90d66978SBart Van Assche "lport->mfs:%u\n", mfs, lport->mfs); 173573d67aa4SVasu Dev fc_lport_error(lport, fp); 17365d8fc4a9SMing Lu goto out; 173773d67aa4SVasu Dev } 173873d67aa4SVasu Dev 173993f90e51SVasu Dev if (mfs <= lport->mfs) { 174093f90e51SVasu Dev lport->mfs = mfs; 174193f90e51SVasu Dev fc_host_maxframe_size(lport->host) = mfs; 174293f90e51SVasu Dev } 174393f90e51SVasu Dev 174442e9a92fSRobert Love csp_flags = ntohs(flp->fl_csp.sp_features); 174542e9a92fSRobert Love r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); 174642e9a92fSRobert Love e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); 174742e9a92fSRobert Love if (csp_flags & FC_SP_FT_EDTR) 174842e9a92fSRobert Love e_d_tov /= 1000000; 1749db36c06cSChris Leech 1750db36c06cSChris Leech lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); 1751db36c06cSChris Leech 175242e9a92fSRobert Love if ((csp_flags & FC_SP_FT_FPORT) == 0) { 175342e9a92fSRobert Love if (e_d_tov > lport->e_d_tov) 175442e9a92fSRobert Love lport->e_d_tov = e_d_tov; 175576e72ad1SHannes Reinecke lport->r_a_tov = 2 * lport->e_d_tov; 1756093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 1757e6d8a1b0SJoe Eykholt printk(KERN_INFO "host%d: libfc: " 1758ce8b5df0SChris Leech "Port (%6.6x) entered " 1759e6d8a1b0SJoe Eykholt "point-to-point mode\n", 1760e6d8a1b0SJoe Eykholt lport->host->host_no, did); 1761251748a9SJoe Eykholt fc_lport_ptp_setup(lport, fc_frame_sid(fp), 176242e9a92fSRobert Love get_unaligned_be64( 176342e9a92fSRobert Love &flp->fl_wwpn), 176442e9a92fSRobert Love get_unaligned_be64( 176542e9a92fSRobert Love &flp->fl_wwnn)); 176642e9a92fSRobert Love } else { 176776e72ad1SHannes Reinecke if (e_d_tov > lport->e_d_tov) 176842e9a92fSRobert Love lport->e_d_tov = e_d_tov; 176976e72ad1SHannes Reinecke if (r_a_tov > lport->r_a_tov) 177042e9a92fSRobert Love lport->r_a_tov = r_a_tov; 177142e9a92fSRobert Love fc_host_fabric_name(lport->host) = 177242e9a92fSRobert Love get_unaligned_be64(&flp->fl_wwnn); 1773093bb6a2SJoe Eykholt fc_lport_set_port_id(lport, did, fp); 177442e9a92fSRobert Love fc_lport_enter_dns(lport); 177542e9a92fSRobert Love } 177642e9a92fSRobert Love 177742e9a92fSRobert Love out: 177842e9a92fSRobert Love fc_frame_free(fp); 177942e9a92fSRobert Love err: 178042e9a92fSRobert Love mutex_unlock(&lport->lp_mutex); 178142e9a92fSRobert Love } 178211b56188SChris Leech EXPORT_SYMBOL(fc_lport_flogi_resp); 178342e9a92fSRobert Love 178442e9a92fSRobert Love /** 17854a4db603SLee Jones * fc_lport_enter_flogi() - Send a FLOGI request to the fabric manager 178642e9a92fSRobert Love * @lport: Fibre Channel local port to be logged in to the fabric 178742e9a92fSRobert Love */ 1788c6b21c93SBart Van Assche static void fc_lport_enter_flogi(struct fc_lport *lport) 178942e9a92fSRobert Love { 179042e9a92fSRobert Love struct fc_frame *fp; 179142e9a92fSRobert Love 1792ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1793ee35624eSHannes Reinecke 17947414705eSRobert Love FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", 17957414705eSRobert Love fc_lport_state(lport)); 179642e9a92fSRobert Love 179742e9a92fSRobert Love fc_lport_state_enter(lport, LPORT_ST_FLOGI); 179842e9a92fSRobert Love 17993726f358SJoe Eykholt if (lport->point_to_multipoint) { 18003726f358SJoe Eykholt if (lport->port_id) 18013726f358SJoe Eykholt fc_lport_enter_ready(lport); 18023726f358SJoe Eykholt return; 18033726f358SJoe Eykholt } 18043726f358SJoe Eykholt 180542e9a92fSRobert Love fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); 180642e9a92fSRobert Love if (!fp) 180742e9a92fSRobert Love return fc_lport_error(lport, fp); 180842e9a92fSRobert Love 1809db36c06cSChris Leech if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, 1810db36c06cSChris Leech lport->vport ? ELS_FDISC : ELS_FLOGI, 1811b94f8951SJoe Eykholt fc_lport_flogi_resp, lport, 1812b94f8951SJoe Eykholt lport->vport ? 2 * lport->r_a_tov : 1813b94f8951SJoe Eykholt lport->e_d_tov)) 18148f550f93SChris Leech fc_lport_error(lport, NULL); 181542e9a92fSRobert Love } 181642e9a92fSRobert Love 18173a3b42bfSRobert Love /** 18183a3b42bfSRobert Love * fc_lport_config() - Configure a fc_lport 18193a3b42bfSRobert Love * @lport: The local port to be configured 18203a3b42bfSRobert Love */ 182142e9a92fSRobert Love int fc_lport_config(struct fc_lport *lport) 182242e9a92fSRobert Love { 182342e9a92fSRobert Love INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); 182442e9a92fSRobert Love mutex_init(&lport->lp_mutex); 182542e9a92fSRobert Love 1826b1d9fd55SJoe Eykholt fc_lport_state_enter(lport, LPORT_ST_DISABLED); 182742e9a92fSRobert Love 182842e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_FCP); 182942e9a92fSRobert Love fc_lport_add_fc4_type(lport, FC_TYPE_CT); 1830acc1a921SKiran Patil fc_fc4_conf_lport_params(lport, FC_TYPE_FCP); 183142e9a92fSRobert Love 183242e9a92fSRobert Love return 0; 183342e9a92fSRobert Love } 183442e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_config); 183542e9a92fSRobert Love 18363a3b42bfSRobert Love /** 18373a3b42bfSRobert Love * fc_lport_init() - Initialize the lport layer for a local port 18383a3b42bfSRobert Love * @lport: The local port to initialize the exchange layer for 18393a3b42bfSRobert Love */ 184042e9a92fSRobert Love int fc_lport_init(struct fc_lport *lport) 184142e9a92fSRobert Love { 184242e9a92fSRobert Love fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; 184342e9a92fSRobert Love fc_host_node_name(lport->host) = lport->wwnn; 184442e9a92fSRobert Love fc_host_port_name(lport->host) = lport->wwpn; 184542e9a92fSRobert Love fc_host_supported_classes(lport->host) = FC_COS_CLASS3; 184642e9a92fSRobert Love memset(fc_host_supported_fc4s(lport->host), 0, 184742e9a92fSRobert Love sizeof(fc_host_supported_fc4s(lport->host))); 184842e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[2] = 1; 184942e9a92fSRobert Love fc_host_supported_fc4s(lport->host)[7] = 1; 185042e9a92fSRobert Love 185142e9a92fSRobert Love /* This value is also unchanging */ 185242e9a92fSRobert Love memset(fc_host_active_fc4s(lport->host), 0, 185342e9a92fSRobert Love sizeof(fc_host_active_fc4s(lport->host))); 185442e9a92fSRobert Love fc_host_active_fc4s(lport->host)[2] = 1; 185542e9a92fSRobert Love fc_host_active_fc4s(lport->host)[7] = 1; 185642e9a92fSRobert Love fc_host_maxframe_size(lport->host) = lport->mfs; 185742e9a92fSRobert Love fc_host_supported_speeds(lport->host) = 0; 185842e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) 185942e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; 186042e9a92fSRobert Love if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) 186142e9a92fSRobert Love fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; 186270d53b04SJoe Eykholt fc_fc4_add_lport(lport); 186342e9a92fSRobert Love 186442e9a92fSRobert Love return 0; 186542e9a92fSRobert Love } 186642e9a92fSRobert Love EXPORT_SYMBOL(fc_lport_init); 1867a51ab396SSteve Ma 1868a51ab396SSteve Ma /** 18693a3b42bfSRobert Love * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests 18703a3b42bfSRobert Love * @sp: The sequence for the FC Passthrough response 18713a3b42bfSRobert Love * @fp: The response frame 18723a3b42bfSRobert Love * @info_arg: The BSG info that the response is for 1873a51ab396SSteve Ma */ 1874a51ab396SSteve Ma static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, 1875a51ab396SSteve Ma void *info_arg) 1876a51ab396SSteve Ma { 1877a51ab396SSteve Ma struct fc_bsg_info *info = info_arg; 187875cc8cfcSJohannes Thumshirn struct bsg_job *job = info->job; 187901e0e15cSJohannes Thumshirn struct fc_bsg_reply *bsg_reply = job->reply; 1880a51ab396SSteve Ma struct fc_lport *lport = info->lport; 1881a51ab396SSteve Ma struct fc_frame_header *fh; 1882a51ab396SSteve Ma size_t len; 1883a51ab396SSteve Ma void *buf; 1884a51ab396SSteve Ma 1885a51ab396SSteve Ma if (IS_ERR(fp)) { 188601e0e15cSJohannes Thumshirn bsg_reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? 1887a51ab396SSteve Ma -ECONNABORTED : -ETIMEDOUT; 1888a51ab396SSteve Ma job->reply_len = sizeof(uint32_t); 188906548160SJohannes Thumshirn bsg_job_done(job, bsg_reply->result, 18901abaede7SJohannes Thumshirn bsg_reply->reply_payload_rcv_len); 1891a51ab396SSteve Ma kfree(info); 1892a51ab396SSteve Ma return; 1893a51ab396SSteve Ma } 1894a51ab396SSteve Ma 1895a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 1896a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1897a51ab396SSteve Ma len = fr_len(fp) - sizeof(*fh); 1898a51ab396SSteve Ma buf = fc_frame_payload_get(fp, 0); 1899a51ab396SSteve Ma 1900a51ab396SSteve Ma if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { 1901a51ab396SSteve Ma /* Get the response code from the first frame payload */ 1902a51ab396SSteve Ma unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? 1903a51ab396SSteve Ma ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : 1904a51ab396SSteve Ma (unsigned short)fc_frame_payload_op(fp); 1905a51ab396SSteve Ma 1906a51ab396SSteve Ma /* Save the reply status of the job */ 190701e0e15cSJohannes Thumshirn bsg_reply->reply_data.ctels_reply.status = 1908a51ab396SSteve Ma (cmd == info->rsp_code) ? 1909a51ab396SSteve Ma FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; 1910a51ab396SSteve Ma } 1911a51ab396SSteve Ma 191201e0e15cSJohannes Thumshirn bsg_reply->reply_payload_rcv_len += 1913a51ab396SSteve Ma fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, 191477dfce07SCong Wang &info->offset, NULL); 1915a51ab396SSteve Ma 1916a51ab396SSteve Ma if (fr_eof(fp) == FC_EOF_T && 1917a51ab396SSteve Ma (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == 1918a51ab396SSteve Ma (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { 191901e0e15cSJohannes Thumshirn if (bsg_reply->reply_payload_rcv_len > 1920a51ab396SSteve Ma job->reply_payload.payload_len) 192101e0e15cSJohannes Thumshirn bsg_reply->reply_payload_rcv_len = 1922a51ab396SSteve Ma job->reply_payload.payload_len; 192301e0e15cSJohannes Thumshirn bsg_reply->result = 0; 192406548160SJohannes Thumshirn bsg_job_done(job, bsg_reply->result, 19251abaede7SJohannes Thumshirn bsg_reply->reply_payload_rcv_len); 1926a51ab396SSteve Ma kfree(info); 1927a51ab396SSteve Ma } 1928a51ab396SSteve Ma fc_frame_free(fp); 1929a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 1930a51ab396SSteve Ma } 1931a51ab396SSteve Ma 1932a51ab396SSteve Ma /** 19333a3b42bfSRobert Love * fc_lport_els_request() - Send ELS passthrough request 19343a3b42bfSRobert Love * @job: The BSG Passthrough job 1935a51ab396SSteve Ma * @lport: The local port sending the request 19363a3b42bfSRobert Love * @did: The destination port id 19379865a04dSLee Jones * @tov: The timeout period (in ms) 1938a51ab396SSteve Ma */ 193975cc8cfcSJohannes Thumshirn static int fc_lport_els_request(struct bsg_job *job, 1940a51ab396SSteve Ma struct fc_lport *lport, 1941a51ab396SSteve Ma u32 did, u32 tov) 1942a51ab396SSteve Ma { 1943a51ab396SSteve Ma struct fc_bsg_info *info; 1944a51ab396SSteve Ma struct fc_frame *fp; 1945a51ab396SSteve Ma struct fc_frame_header *fh; 1946a51ab396SSteve Ma char *pp; 1947a51ab396SSteve Ma int len; 1948a51ab396SSteve Ma 1949ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 1950ee35624eSHannes Reinecke 195170d919fbSYi Zou fp = fc_frame_alloc(lport, job->request_payload.payload_len); 1952a51ab396SSteve Ma if (!fp) 1953a51ab396SSteve Ma return -ENOMEM; 1954a51ab396SSteve Ma 1955a51ab396SSteve Ma len = job->request_payload.payload_len; 1956a51ab396SSteve Ma pp = fc_frame_payload_get(fp, len); 1957a51ab396SSteve Ma 1958a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 1959a51ab396SSteve Ma job->request_payload.sg_cnt, 1960a51ab396SSteve Ma pp, len); 1961a51ab396SSteve Ma 1962a51ab396SSteve Ma fh = fc_frame_header_get(fp); 1963a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_ELS_REQ; 1964a51ab396SSteve Ma hton24(fh->fh_d_id, did); 19657b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 1966a51ab396SSteve Ma fh->fh_type = FC_TYPE_ELS; 196724f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 1968a51ab396SSteve Ma fh->fh_cs_ctl = 0; 1969a51ab396SSteve Ma fh->fh_df_ctl = 0; 1970a51ab396SSteve Ma fh->fh_parm_offset = 0; 1971a51ab396SSteve Ma 1972a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 1973a51ab396SSteve Ma if (!info) { 1974a51ab396SSteve Ma fc_frame_free(fp); 1975a51ab396SSteve Ma return -ENOMEM; 1976a51ab396SSteve Ma } 1977a51ab396SSteve Ma 1978a51ab396SSteve Ma info->job = job; 1979a51ab396SSteve Ma info->lport = lport; 1980a51ab396SSteve Ma info->rsp_code = ELS_LS_ACC; 1981a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 1982a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 1983a51ab396SSteve Ma 19843afd2d15SHannes Reinecke if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp, 198572e0daadSHillf Danton NULL, info, tov)) { 198672e0daadSHillf Danton kfree(info); 1987a51ab396SSteve Ma return -ECOMM; 198872e0daadSHillf Danton } 1989a51ab396SSteve Ma return 0; 1990a51ab396SSteve Ma } 1991a51ab396SSteve Ma 1992a51ab396SSteve Ma /** 19933a3b42bfSRobert Love * fc_lport_ct_request() - Send CT Passthrough request 19943a3b42bfSRobert Love * @job: The BSG Passthrough job 1995a51ab396SSteve Ma * @lport: The local port sending the request 1996a51ab396SSteve Ma * @did: The destination FC-ID 19973a3b42bfSRobert Love * @tov: The timeout period to wait for the response 1998a51ab396SSteve Ma */ 199975cc8cfcSJohannes Thumshirn static int fc_lport_ct_request(struct bsg_job *job, 2000a51ab396SSteve Ma struct fc_lport *lport, u32 did, u32 tov) 2001a51ab396SSteve Ma { 2002a51ab396SSteve Ma struct fc_bsg_info *info; 2003a51ab396SSteve Ma struct fc_frame *fp; 2004a51ab396SSteve Ma struct fc_frame_header *fh; 2005a51ab396SSteve Ma struct fc_ct_req *ct; 2006a51ab396SSteve Ma size_t len; 2007a51ab396SSteve Ma 2008ee35624eSHannes Reinecke lockdep_assert_held(&lport->lp_mutex); 2009ee35624eSHannes Reinecke 2010a51ab396SSteve Ma fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + 2011a51ab396SSteve Ma job->request_payload.payload_len); 2012a51ab396SSteve Ma if (!fp) 2013a51ab396SSteve Ma return -ENOMEM; 2014a51ab396SSteve Ma 2015a51ab396SSteve Ma len = job->request_payload.payload_len; 2016a51ab396SSteve Ma ct = fc_frame_payload_get(fp, len); 2017a51ab396SSteve Ma 2018a51ab396SSteve Ma sg_copy_to_buffer(job->request_payload.sg_list, 2019a51ab396SSteve Ma job->request_payload.sg_cnt, 2020a51ab396SSteve Ma ct, len); 2021a51ab396SSteve Ma 2022a51ab396SSteve Ma fh = fc_frame_header_get(fp); 2023a51ab396SSteve Ma fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; 2024a51ab396SSteve Ma hton24(fh->fh_d_id, did); 20257b2787ecSRobert Love hton24(fh->fh_s_id, lport->port_id); 2026a51ab396SSteve Ma fh->fh_type = FC_TYPE_CT; 202724f089e2SJoe Eykholt hton24(fh->fh_f_ctl, FC_FCTL_REQ); 2028a51ab396SSteve Ma fh->fh_cs_ctl = 0; 2029a51ab396SSteve Ma fh->fh_df_ctl = 0; 2030a51ab396SSteve Ma fh->fh_parm_offset = 0; 2031a51ab396SSteve Ma 2032a51ab396SSteve Ma info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); 2033a51ab396SSteve Ma if (!info) { 2034a51ab396SSteve Ma fc_frame_free(fp); 2035a51ab396SSteve Ma return -ENOMEM; 2036a51ab396SSteve Ma } 2037a51ab396SSteve Ma 2038a51ab396SSteve Ma info->job = job; 2039a51ab396SSteve Ma info->lport = lport; 2040a51ab396SSteve Ma info->rsp_code = FC_FS_ACC; 2041a51ab396SSteve Ma info->nents = job->reply_payload.sg_cnt; 2042a51ab396SSteve Ma info->sg = job->reply_payload.sg_list; 2043a51ab396SSteve Ma 20443afd2d15SHannes Reinecke if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp, 20452d6dfb00SHillf Danton NULL, info, tov)) { 20462d6dfb00SHillf Danton kfree(info); 2047a51ab396SSteve Ma return -ECOMM; 20482d6dfb00SHillf Danton } 2049a51ab396SSteve Ma return 0; 2050a51ab396SSteve Ma } 2051a51ab396SSteve Ma 2052a51ab396SSteve Ma /** 2053a51ab396SSteve Ma * fc_lport_bsg_request() - The common entry point for sending 20543a3b42bfSRobert Love * FC Passthrough requests 20553a3b42bfSRobert Love * @job: The BSG passthrough job 2056a51ab396SSteve Ma */ 205775cc8cfcSJohannes Thumshirn int fc_lport_bsg_request(struct bsg_job *job) 2058a51ab396SSteve Ma { 205901e0e15cSJohannes Thumshirn struct fc_bsg_request *bsg_request = job->request; 206001e0e15cSJohannes Thumshirn struct fc_bsg_reply *bsg_reply = job->reply; 2061cd21c605SJohannes Thumshirn struct Scsi_Host *shost = fc_bsg_to_shost(job); 2062a51ab396SSteve Ma struct fc_lport *lport = shost_priv(shost); 2063a51ab396SSteve Ma struct fc_rport *rport; 2064a51ab396SSteve Ma struct fc_rport_priv *rdata; 2065a51ab396SSteve Ma int rc = -EINVAL; 2066baa6719fSHannes Reinecke u32 did, tov; 2067a51ab396SSteve Ma 206801e0e15cSJohannes Thumshirn bsg_reply->reply_payload_rcv_len = 0; 2069a51ab396SSteve Ma 2070a51ab396SSteve Ma mutex_lock(&lport->lp_mutex); 2071a51ab396SSteve Ma 207201e0e15cSJohannes Thumshirn switch (bsg_request->msgcode) { 2073a51ab396SSteve Ma case FC_BSG_RPT_ELS: 20741d69b122SJohannes Thumshirn rport = fc_bsg_to_rport(job); 2075a51ab396SSteve Ma if (!rport) 2076a51ab396SSteve Ma break; 2077a51ab396SSteve Ma 2078a51ab396SSteve Ma rdata = rport->dd_data; 2079a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, rport->port_id, 2080a51ab396SSteve Ma rdata->e_d_tov); 2081a51ab396SSteve Ma break; 2082a51ab396SSteve Ma 2083a51ab396SSteve Ma case FC_BSG_RPT_CT: 20841d69b122SJohannes Thumshirn rport = fc_bsg_to_rport(job); 2085a51ab396SSteve Ma if (!rport) 2086a51ab396SSteve Ma break; 2087a51ab396SSteve Ma 2088a51ab396SSteve Ma rdata = rport->dd_data; 2089a51ab396SSteve Ma rc = fc_lport_ct_request(job, lport, rport->port_id, 2090a51ab396SSteve Ma rdata->e_d_tov); 2091a51ab396SSteve Ma break; 2092a51ab396SSteve Ma 2093a51ab396SSteve Ma case FC_BSG_HST_CT: 209401e0e15cSJohannes Thumshirn did = ntoh24(bsg_request->rqst_data.h_ct.port_id); 2095baa6719fSHannes Reinecke if (did == FC_FID_DIR_SERV) { 20963a3b42bfSRobert Love rdata = lport->dns_rdata; 2097a51ab396SSteve Ma if (!rdata) 2098a51ab396SSteve Ma break; 2099baa6719fSHannes Reinecke tov = rdata->e_d_tov; 2100baa6719fSHannes Reinecke } else { 2101e87b7777SHannes Reinecke rdata = fc_rport_lookup(lport, did); 2102baa6719fSHannes Reinecke if (!rdata) 2103baa6719fSHannes Reinecke break; 2104baa6719fSHannes Reinecke tov = rdata->e_d_tov; 2105944ef968SHannes Reinecke kref_put(&rdata->kref, fc_rport_destroy); 2106baa6719fSHannes Reinecke } 2107a51ab396SSteve Ma 2108baa6719fSHannes Reinecke rc = fc_lport_ct_request(job, lport, did, tov); 2109a51ab396SSteve Ma break; 2110a51ab396SSteve Ma 2111a51ab396SSteve Ma case FC_BSG_HST_ELS_NOLOGIN: 211201e0e15cSJohannes Thumshirn did = ntoh24(bsg_request->rqst_data.h_els.port_id); 2113a51ab396SSteve Ma rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); 2114a51ab396SSteve Ma break; 2115a51ab396SSteve Ma } 2116a51ab396SSteve Ma 2117a51ab396SSteve Ma mutex_unlock(&lport->lp_mutex); 2118a51ab396SSteve Ma return rc; 2119a51ab396SSteve Ma } 2120a51ab396SSteve Ma EXPORT_SYMBOL(fc_lport_bsg_request); 2121