1de909d87SChad Dupuis /* bnx2fc_io.c: QLogic Linux FCoE offload driver. 2853e2bd2SBhanu Gollapudi * IO manager and SCSI IO processing. 3853e2bd2SBhanu Gollapudi * 4cf122191SBhanu Prakash Gollapudi * Copyright (c) 2008-2013 Broadcom Corporation 597586090SChad Dupuis * Copyright (c) 2014-2015 QLogic Corporation 6853e2bd2SBhanu Gollapudi * 7853e2bd2SBhanu Gollapudi * This program is free software; you can redistribute it and/or modify 8853e2bd2SBhanu Gollapudi * it under the terms of the GNU General Public License as published by 9853e2bd2SBhanu Gollapudi * the Free Software Foundation. 10853e2bd2SBhanu Gollapudi * 11853e2bd2SBhanu Gollapudi * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com) 12853e2bd2SBhanu Gollapudi */ 13853e2bd2SBhanu Gollapudi 14853e2bd2SBhanu Gollapudi #include "bnx2fc.h" 150ea5c275SBhanu Gollapudi 160ea5c275SBhanu Gollapudi #define RESERVE_FREE_LIST_INDEX num_possible_cpus() 170ea5c275SBhanu Gollapudi 18853e2bd2SBhanu Gollapudi static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 19853e2bd2SBhanu Gollapudi int bd_index); 20853e2bd2SBhanu Gollapudi static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req); 21822f2903SBhanu Prakash Gollapudi static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); 22853e2bd2SBhanu Gollapudi static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); 23853e2bd2SBhanu Gollapudi static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); 24853e2bd2SBhanu Gollapudi static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, 25853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp, 26853e2bd2SBhanu Gollapudi u8 num_rq); 27853e2bd2SBhanu Gollapudi 28853e2bd2SBhanu Gollapudi void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req, 29853e2bd2SBhanu Gollapudi unsigned int timer_msec) 30853e2bd2SBhanu Gollapudi { 31aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 32853e2bd2SBhanu Gollapudi 33aea71a02SBhanu Prakash Gollapudi if (queue_delayed_work(interface->timer_work_queue, 34aea71a02SBhanu Prakash Gollapudi &io_req->timeout_work, 35853e2bd2SBhanu Gollapudi msecs_to_jiffies(timer_msec))) 36853e2bd2SBhanu Gollapudi kref_get(&io_req->refcount); 37853e2bd2SBhanu Gollapudi } 38853e2bd2SBhanu Gollapudi 39853e2bd2SBhanu Gollapudi static void bnx2fc_cmd_timeout(struct work_struct *work) 40853e2bd2SBhanu Gollapudi { 41853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd, 42853e2bd2SBhanu Gollapudi timeout_work.work); 43853e2bd2SBhanu Gollapudi struct fc_lport *lport; 44853e2bd2SBhanu Gollapudi struct fc_rport_priv *rdata; 45853e2bd2SBhanu Gollapudi u8 cmd_type = io_req->cmd_type; 46853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 47853e2bd2SBhanu Gollapudi int logo_issued; 48853e2bd2SBhanu Gollapudi int rc; 49853e2bd2SBhanu Gollapudi 50853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d," 51853e2bd2SBhanu Gollapudi "req_flags = %lx\n", cmd_type, io_req->req_flags); 52853e2bd2SBhanu Gollapudi 53853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 54853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) { 55853e2bd2SBhanu Gollapudi clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 56853e2bd2SBhanu Gollapudi /* 57853e2bd2SBhanu Gollapudi * ideally we should hold the io_req until RRQ complets, 58853e2bd2SBhanu Gollapudi * and release io_req from timeout hold. 59853e2bd2SBhanu Gollapudi */ 60853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 61853e2bd2SBhanu Gollapudi bnx2fc_send_rrq(io_req); 62853e2bd2SBhanu Gollapudi return; 63853e2bd2SBhanu Gollapudi } 64853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) { 65853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n"); 66853e2bd2SBhanu Gollapudi goto done; 67853e2bd2SBhanu Gollapudi } 68853e2bd2SBhanu Gollapudi 69853e2bd2SBhanu Gollapudi switch (cmd_type) { 70853e2bd2SBhanu Gollapudi case BNX2FC_SCSI_CMD: 71853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 72853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 73853e2bd2SBhanu Gollapudi /* Handle eh_abort timeout */ 74853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "eh_abort timed out\n"); 75853e2bd2SBhanu Gollapudi complete(&io_req->tm_done); 76853e2bd2SBhanu Gollapudi } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, 77853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 78853e2bd2SBhanu Gollapudi /* Handle internally generated ABTS timeout */ 79853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n", 80853e2bd2SBhanu Gollapudi io_req->refcount.refcount.counter); 81853e2bd2SBhanu Gollapudi if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 82853e2bd2SBhanu Gollapudi &io_req->req_flags))) { 83853e2bd2SBhanu Gollapudi 84853e2bd2SBhanu Gollapudi lport = io_req->port->lport; 85853e2bd2SBhanu Gollapudi rdata = io_req->tgt->rdata; 86853e2bd2SBhanu Gollapudi logo_issued = test_and_set_bit( 87853e2bd2SBhanu Gollapudi BNX2FC_FLAG_EXPL_LOGO, 88853e2bd2SBhanu Gollapudi &tgt->flags); 89853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 90853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 91853e2bd2SBhanu Gollapudi 92853e2bd2SBhanu Gollapudi /* Explicitly logo the target */ 93853e2bd2SBhanu Gollapudi if (!logo_issued) { 94853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Explicit " 95853e2bd2SBhanu Gollapudi "logo - tgt flags = 0x%lx\n", 96853e2bd2SBhanu Gollapudi tgt->flags); 97853e2bd2SBhanu Gollapudi 98853e2bd2SBhanu Gollapudi mutex_lock(&lport->disc.disc_mutex); 99853e2bd2SBhanu Gollapudi lport->tt.rport_logoff(rdata); 100853e2bd2SBhanu Gollapudi mutex_unlock(&lport->disc.disc_mutex); 101853e2bd2SBhanu Gollapudi } 102853e2bd2SBhanu Gollapudi return; 103853e2bd2SBhanu Gollapudi } 104853e2bd2SBhanu Gollapudi } else { 105853e2bd2SBhanu Gollapudi /* Hanlde IO timeout */ 106853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n"); 107853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, 108853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 109853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO completed before " 110853e2bd2SBhanu Gollapudi " timer expiry\n"); 111853e2bd2SBhanu Gollapudi goto done; 112853e2bd2SBhanu Gollapudi } 113853e2bd2SBhanu Gollapudi 114853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 115853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 116853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(io_req); 117853e2bd2SBhanu Gollapudi if (rc == SUCCESS) 118853e2bd2SBhanu Gollapudi goto done; 119853e2bd2SBhanu Gollapudi /* 120853e2bd2SBhanu Gollapudi * Explicitly logo the target if 121853e2bd2SBhanu Gollapudi * abts initiation fails 122853e2bd2SBhanu Gollapudi */ 123853e2bd2SBhanu Gollapudi lport = io_req->port->lport; 124853e2bd2SBhanu Gollapudi rdata = io_req->tgt->rdata; 125853e2bd2SBhanu Gollapudi logo_issued = test_and_set_bit( 126853e2bd2SBhanu Gollapudi BNX2FC_FLAG_EXPL_LOGO, 127853e2bd2SBhanu Gollapudi &tgt->flags); 128853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 129853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 130853e2bd2SBhanu Gollapudi 131853e2bd2SBhanu Gollapudi if (!logo_issued) { 132853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Explicit " 133853e2bd2SBhanu Gollapudi "logo - tgt flags = 0x%lx\n", 134853e2bd2SBhanu Gollapudi tgt->flags); 135853e2bd2SBhanu Gollapudi 136853e2bd2SBhanu Gollapudi 137853e2bd2SBhanu Gollapudi mutex_lock(&lport->disc.disc_mutex); 138853e2bd2SBhanu Gollapudi lport->tt.rport_logoff(rdata); 139853e2bd2SBhanu Gollapudi mutex_unlock(&lport->disc.disc_mutex); 140853e2bd2SBhanu Gollapudi } 141853e2bd2SBhanu Gollapudi return; 142853e2bd2SBhanu Gollapudi } else { 143853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO already in " 144853e2bd2SBhanu Gollapudi "ABTS processing\n"); 145853e2bd2SBhanu Gollapudi } 146853e2bd2SBhanu Gollapudi } 147853e2bd2SBhanu Gollapudi break; 148853e2bd2SBhanu Gollapudi case BNX2FC_ELS: 149853e2bd2SBhanu Gollapudi 150853e2bd2SBhanu Gollapudi if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 151853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n"); 152853e2bd2SBhanu Gollapudi 153853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 154853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 155853e2bd2SBhanu Gollapudi lport = io_req->port->lport; 156853e2bd2SBhanu Gollapudi rdata = io_req->tgt->rdata; 157853e2bd2SBhanu Gollapudi logo_issued = test_and_set_bit( 158853e2bd2SBhanu Gollapudi BNX2FC_FLAG_EXPL_LOGO, 159853e2bd2SBhanu Gollapudi &tgt->flags); 160853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 161853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 162853e2bd2SBhanu Gollapudi 163853e2bd2SBhanu Gollapudi /* Explicitly logo the target */ 164853e2bd2SBhanu Gollapudi if (!logo_issued) { 165853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Explicitly logo" 166853e2bd2SBhanu Gollapudi "(els)\n"); 167853e2bd2SBhanu Gollapudi mutex_lock(&lport->disc.disc_mutex); 168853e2bd2SBhanu Gollapudi lport->tt.rport_logoff(rdata); 169853e2bd2SBhanu Gollapudi mutex_unlock(&lport->disc.disc_mutex); 170853e2bd2SBhanu Gollapudi } 171853e2bd2SBhanu Gollapudi return; 172853e2bd2SBhanu Gollapudi } 173853e2bd2SBhanu Gollapudi } else { 174853e2bd2SBhanu Gollapudi /* 175853e2bd2SBhanu Gollapudi * Handle ELS timeout. 176853e2bd2SBhanu Gollapudi * tgt_lock is used to sync compl path and timeout 177853e2bd2SBhanu Gollapudi * path. If els compl path is processing this IO, we 178853e2bd2SBhanu Gollapudi * have nothing to do here, just release the timer hold 179853e2bd2SBhanu Gollapudi */ 180853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ELS timed out\n"); 181853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, 182853e2bd2SBhanu Gollapudi &io_req->req_flags)) 183853e2bd2SBhanu Gollapudi goto done; 184853e2bd2SBhanu Gollapudi 185853e2bd2SBhanu Gollapudi /* Indicate the cb_func that this ELS is timed out */ 186853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags); 187853e2bd2SBhanu Gollapudi 188853e2bd2SBhanu Gollapudi if ((io_req->cb_func) && (io_req->cb_arg)) { 189853e2bd2SBhanu Gollapudi io_req->cb_func(io_req->cb_arg); 190853e2bd2SBhanu Gollapudi io_req->cb_arg = NULL; 191853e2bd2SBhanu Gollapudi } 192853e2bd2SBhanu Gollapudi } 193853e2bd2SBhanu Gollapudi break; 194853e2bd2SBhanu Gollapudi default: 195853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n", 196853e2bd2SBhanu Gollapudi cmd_type); 197853e2bd2SBhanu Gollapudi break; 198853e2bd2SBhanu Gollapudi } 199853e2bd2SBhanu Gollapudi 200853e2bd2SBhanu Gollapudi done: 201853e2bd2SBhanu Gollapudi /* release the cmd that was held when timer was set */ 202853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 203853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 204853e2bd2SBhanu Gollapudi } 205853e2bd2SBhanu Gollapudi 206853e2bd2SBhanu Gollapudi static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code) 207853e2bd2SBhanu Gollapudi { 208853e2bd2SBhanu Gollapudi /* Called with host lock held */ 209853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 210853e2bd2SBhanu Gollapudi 211853e2bd2SBhanu Gollapudi /* 212853e2bd2SBhanu Gollapudi * active_cmd_queue may have other command types as well, 213853e2bd2SBhanu Gollapudi * and during flush operation, we want to error back only 214853e2bd2SBhanu Gollapudi * scsi commands. 215853e2bd2SBhanu Gollapudi */ 216853e2bd2SBhanu Gollapudi if (io_req->cmd_type != BNX2FC_SCSI_CMD) 217853e2bd2SBhanu Gollapudi return; 218853e2bd2SBhanu Gollapudi 219853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code); 22074446954SBhanu Prakash Gollapudi if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) { 22174446954SBhanu Prakash Gollapudi /* Do not call scsi done for this IO */ 22274446954SBhanu Prakash Gollapudi return; 22374446954SBhanu Prakash Gollapudi } 22474446954SBhanu Prakash Gollapudi 225853e2bd2SBhanu Gollapudi bnx2fc_unmap_sg_list(io_req); 226853e2bd2SBhanu Gollapudi io_req->sc_cmd = NULL; 227853e2bd2SBhanu Gollapudi if (!sc_cmd) { 228853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. " 229853e2bd2SBhanu Gollapudi "IO(0x%x) already cleaned up\n", 230853e2bd2SBhanu Gollapudi io_req->xid); 231853e2bd2SBhanu Gollapudi return; 232853e2bd2SBhanu Gollapudi } 233853e2bd2SBhanu Gollapudi sc_cmd->result = err_code << 16; 234853e2bd2SBhanu Gollapudi 235853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n", 236853e2bd2SBhanu Gollapudi sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries, 237853e2bd2SBhanu Gollapudi sc_cmd->allowed); 238853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 239853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = NULL; 240853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 241853e2bd2SBhanu Gollapudi } 242853e2bd2SBhanu Gollapudi 2430eb43b4bSBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba) 244853e2bd2SBhanu Gollapudi { 245853e2bd2SBhanu Gollapudi struct bnx2fc_cmd_mgr *cmgr; 246853e2bd2SBhanu Gollapudi struct io_bdt *bdt_info; 247853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 248853e2bd2SBhanu Gollapudi size_t len; 249853e2bd2SBhanu Gollapudi u32 mem_size; 250853e2bd2SBhanu Gollapudi u16 xid; 251853e2bd2SBhanu Gollapudi int i; 2520ea5c275SBhanu Gollapudi int num_ios, num_pri_ios; 253853e2bd2SBhanu Gollapudi size_t bd_tbl_sz; 2540ea5c275SBhanu Gollapudi int arr_sz = num_possible_cpus() + 1; 2550eb43b4bSBhanu Prakash Gollapudi u16 min_xid = BNX2FC_MIN_XID; 2560eb43b4bSBhanu Prakash Gollapudi u16 max_xid = hba->max_xid; 257853e2bd2SBhanu Gollapudi 258853e2bd2SBhanu Gollapudi if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { 259853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \ 260853e2bd2SBhanu Gollapudi and max_xid 0x%x\n", min_xid, max_xid); 261853e2bd2SBhanu Gollapudi return NULL; 262853e2bd2SBhanu Gollapudi } 263853e2bd2SBhanu Gollapudi BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid); 264853e2bd2SBhanu Gollapudi 265853e2bd2SBhanu Gollapudi num_ios = max_xid - min_xid + 1; 266853e2bd2SBhanu Gollapudi len = (num_ios * (sizeof(struct bnx2fc_cmd *))); 267853e2bd2SBhanu Gollapudi len += sizeof(struct bnx2fc_cmd_mgr); 268853e2bd2SBhanu Gollapudi 269853e2bd2SBhanu Gollapudi cmgr = kzalloc(len, GFP_KERNEL); 270853e2bd2SBhanu Gollapudi if (!cmgr) { 271853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc cmgr\n"); 272853e2bd2SBhanu Gollapudi return NULL; 273853e2bd2SBhanu Gollapudi } 274853e2bd2SBhanu Gollapudi 275853e2bd2SBhanu Gollapudi cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) * 2760ea5c275SBhanu Gollapudi arr_sz, GFP_KERNEL); 277853e2bd2SBhanu Gollapudi if (!cmgr->free_list) { 278853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc free_list\n"); 279853e2bd2SBhanu Gollapudi goto mem_err; 280853e2bd2SBhanu Gollapudi } 281853e2bd2SBhanu Gollapudi 282853e2bd2SBhanu Gollapudi cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) * 2830ea5c275SBhanu Gollapudi arr_sz, GFP_KERNEL); 284853e2bd2SBhanu Gollapudi if (!cmgr->free_list_lock) { 285853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc free_list_lock\n"); 2869172b763SMaurizio Lombardi kfree(cmgr->free_list); 2879172b763SMaurizio Lombardi cmgr->free_list = NULL; 288853e2bd2SBhanu Gollapudi goto mem_err; 289853e2bd2SBhanu Gollapudi } 290853e2bd2SBhanu Gollapudi 291853e2bd2SBhanu Gollapudi cmgr->hba = hba; 292853e2bd2SBhanu Gollapudi cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1); 293853e2bd2SBhanu Gollapudi 2940ea5c275SBhanu Gollapudi for (i = 0; i < arr_sz; i++) { 295853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&cmgr->free_list[i]); 296853e2bd2SBhanu Gollapudi spin_lock_init(&cmgr->free_list_lock[i]); 297853e2bd2SBhanu Gollapudi } 298853e2bd2SBhanu Gollapudi 2990ea5c275SBhanu Gollapudi /* 3000ea5c275SBhanu Gollapudi * Pre-allocated pool of bnx2fc_cmds. 3010ea5c275SBhanu Gollapudi * Last entry in the free list array is the free list 3020ea5c275SBhanu Gollapudi * of slow path requests. 3030ea5c275SBhanu Gollapudi */ 304853e2bd2SBhanu Gollapudi xid = BNX2FC_MIN_XID; 3050eb43b4bSBhanu Prakash Gollapudi num_pri_ios = num_ios - hba->elstm_xids; 306853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 307853e2bd2SBhanu Gollapudi io_req = kzalloc(sizeof(*io_req), GFP_KERNEL); 308853e2bd2SBhanu Gollapudi 309853e2bd2SBhanu Gollapudi if (!io_req) { 310853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc io_req\n"); 311853e2bd2SBhanu Gollapudi goto mem_err; 312853e2bd2SBhanu Gollapudi } 313853e2bd2SBhanu Gollapudi 314853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link); 315853e2bd2SBhanu Gollapudi INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout); 316853e2bd2SBhanu Gollapudi 317853e2bd2SBhanu Gollapudi io_req->xid = xid++; 3180ea5c275SBhanu Gollapudi if (i < num_pri_ios) 319853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, 3200ea5c275SBhanu Gollapudi &cmgr->free_list[io_req->xid % 3210ea5c275SBhanu Gollapudi num_possible_cpus()]); 3220ea5c275SBhanu Gollapudi else 3230ea5c275SBhanu Gollapudi list_add_tail(&io_req->link, 3240ea5c275SBhanu Gollapudi &cmgr->free_list[num_possible_cpus()]); 325853e2bd2SBhanu Gollapudi io_req++; 326853e2bd2SBhanu Gollapudi } 327853e2bd2SBhanu Gollapudi 328853e2bd2SBhanu Gollapudi /* Allocate pool of io_bdts - one for each bnx2fc_cmd */ 329853e2bd2SBhanu Gollapudi mem_size = num_ios * sizeof(struct io_bdt *); 330853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL); 331853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool) { 332853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n"); 333853e2bd2SBhanu Gollapudi goto mem_err; 334853e2bd2SBhanu Gollapudi } 335853e2bd2SBhanu Gollapudi 336853e2bd2SBhanu Gollapudi mem_size = sizeof(struct io_bdt); 337853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 338853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL); 339853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool[i]) { 340853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc " 341853e2bd2SBhanu Gollapudi "io_bdt_pool[%d]\n", i); 342853e2bd2SBhanu Gollapudi goto mem_err; 343853e2bd2SBhanu Gollapudi } 344853e2bd2SBhanu Gollapudi } 345853e2bd2SBhanu Gollapudi 346853e2bd2SBhanu Gollapudi /* Allocate an map fcoe_bdt_ctx structures */ 347853e2bd2SBhanu Gollapudi bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); 348853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 349853e2bd2SBhanu Gollapudi bdt_info = cmgr->io_bdt_pool[i]; 350853e2bd2SBhanu Gollapudi bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, 351853e2bd2SBhanu Gollapudi bd_tbl_sz, 352853e2bd2SBhanu Gollapudi &bdt_info->bd_tbl_dma, 353853e2bd2SBhanu Gollapudi GFP_KERNEL); 354853e2bd2SBhanu Gollapudi if (!bdt_info->bd_tbl) { 355853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc " 356853e2bd2SBhanu Gollapudi "bdt_tbl[%d]\n", i); 357853e2bd2SBhanu Gollapudi goto mem_err; 358853e2bd2SBhanu Gollapudi } 359853e2bd2SBhanu Gollapudi } 360853e2bd2SBhanu Gollapudi 361853e2bd2SBhanu Gollapudi return cmgr; 362853e2bd2SBhanu Gollapudi 363853e2bd2SBhanu Gollapudi mem_err: 364853e2bd2SBhanu Gollapudi bnx2fc_cmd_mgr_free(cmgr); 365853e2bd2SBhanu Gollapudi return NULL; 366853e2bd2SBhanu Gollapudi } 367853e2bd2SBhanu Gollapudi 368853e2bd2SBhanu Gollapudi void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr) 369853e2bd2SBhanu Gollapudi { 370853e2bd2SBhanu Gollapudi struct io_bdt *bdt_info; 371853e2bd2SBhanu Gollapudi struct bnx2fc_hba *hba = cmgr->hba; 372853e2bd2SBhanu Gollapudi size_t bd_tbl_sz; 373853e2bd2SBhanu Gollapudi u16 min_xid = BNX2FC_MIN_XID; 3740eb43b4bSBhanu Prakash Gollapudi u16 max_xid = hba->max_xid; 375853e2bd2SBhanu Gollapudi int num_ios; 376853e2bd2SBhanu Gollapudi int i; 377853e2bd2SBhanu Gollapudi 378853e2bd2SBhanu Gollapudi num_ios = max_xid - min_xid + 1; 379853e2bd2SBhanu Gollapudi 380853e2bd2SBhanu Gollapudi /* Free fcoe_bdt_ctx structures */ 381853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool) 382853e2bd2SBhanu Gollapudi goto free_cmd_pool; 383853e2bd2SBhanu Gollapudi 384853e2bd2SBhanu Gollapudi bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); 385853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 386853e2bd2SBhanu Gollapudi bdt_info = cmgr->io_bdt_pool[i]; 387853e2bd2SBhanu Gollapudi if (bdt_info->bd_tbl) { 388853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz, 389853e2bd2SBhanu Gollapudi bdt_info->bd_tbl, 390853e2bd2SBhanu Gollapudi bdt_info->bd_tbl_dma); 391853e2bd2SBhanu Gollapudi bdt_info->bd_tbl = NULL; 392853e2bd2SBhanu Gollapudi } 393853e2bd2SBhanu Gollapudi } 394853e2bd2SBhanu Gollapudi 395853e2bd2SBhanu Gollapudi /* Destroy io_bdt pool */ 396853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 397853e2bd2SBhanu Gollapudi kfree(cmgr->io_bdt_pool[i]); 398853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool[i] = NULL; 399853e2bd2SBhanu Gollapudi } 400853e2bd2SBhanu Gollapudi 401853e2bd2SBhanu Gollapudi kfree(cmgr->io_bdt_pool); 402853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool = NULL; 403853e2bd2SBhanu Gollapudi 404853e2bd2SBhanu Gollapudi free_cmd_pool: 405853e2bd2SBhanu Gollapudi kfree(cmgr->free_list_lock); 406853e2bd2SBhanu Gollapudi 407853e2bd2SBhanu Gollapudi /* Destroy cmd pool */ 408853e2bd2SBhanu Gollapudi if (!cmgr->free_list) 409853e2bd2SBhanu Gollapudi goto free_cmgr; 410853e2bd2SBhanu Gollapudi 4110ea5c275SBhanu Gollapudi for (i = 0; i < num_possible_cpus() + 1; i++) { 412d71fb3bdSBhanu Prakash Gollapudi struct bnx2fc_cmd *tmp, *io_req; 413853e2bd2SBhanu Gollapudi 414d71fb3bdSBhanu Prakash Gollapudi list_for_each_entry_safe(io_req, tmp, 415d71fb3bdSBhanu Prakash Gollapudi &cmgr->free_list[i], link) { 416853e2bd2SBhanu Gollapudi list_del(&io_req->link); 417853e2bd2SBhanu Gollapudi kfree(io_req); 418853e2bd2SBhanu Gollapudi } 419853e2bd2SBhanu Gollapudi } 420853e2bd2SBhanu Gollapudi kfree(cmgr->free_list); 421853e2bd2SBhanu Gollapudi free_cmgr: 422853e2bd2SBhanu Gollapudi /* Free command manager itself */ 423853e2bd2SBhanu Gollapudi kfree(cmgr); 424853e2bd2SBhanu Gollapudi } 425853e2bd2SBhanu Gollapudi 426853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type) 427853e2bd2SBhanu Gollapudi { 428853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port; 429aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv; 430aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; 431853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 432853e2bd2SBhanu Gollapudi struct list_head *listp; 433853e2bd2SBhanu Gollapudi struct io_bdt *bd_tbl; 4340ea5c275SBhanu Gollapudi int index = RESERVE_FREE_LIST_INDEX; 435619c5cb6SVlad Zolotarov u32 free_sqes; 436853e2bd2SBhanu Gollapudi u32 max_sqes; 437853e2bd2SBhanu Gollapudi u16 xid; 438853e2bd2SBhanu Gollapudi 439853e2bd2SBhanu Gollapudi max_sqes = tgt->max_sqes; 440853e2bd2SBhanu Gollapudi switch (type) { 441853e2bd2SBhanu Gollapudi case BNX2FC_TASK_MGMT_CMD: 442853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_TM_MAX_SQES; 443853e2bd2SBhanu Gollapudi break; 444853e2bd2SBhanu Gollapudi case BNX2FC_ELS: 445853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_ELS_MAX_SQES; 446853e2bd2SBhanu Gollapudi break; 447853e2bd2SBhanu Gollapudi default: 448853e2bd2SBhanu Gollapudi break; 449853e2bd2SBhanu Gollapudi } 450853e2bd2SBhanu Gollapudi 451853e2bd2SBhanu Gollapudi /* 452853e2bd2SBhanu Gollapudi * NOTE: Free list insertions and deletions are protected with 453853e2bd2SBhanu Gollapudi * cmgr lock 454853e2bd2SBhanu Gollapudi */ 4550ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]); 456619c5cb6SVlad Zolotarov free_sqes = atomic_read(&tgt->free_sqes); 4570ea5c275SBhanu Gollapudi if ((list_empty(&(cmd_mgr->free_list[index]))) || 458619c5cb6SVlad Zolotarov (tgt->num_active_ios.counter >= max_sqes) || 459619c5cb6SVlad Zolotarov (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { 460853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available " 461853e2bd2SBhanu Gollapudi "ios(%d):sqes(%d)\n", 462853e2bd2SBhanu Gollapudi tgt->num_active_ios.counter, tgt->max_sqes); 4630ea5c275SBhanu Gollapudi if (list_empty(&(cmd_mgr->free_list[index]))) 464853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "elstm_alloc: list_empty\n"); 4650ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 466853e2bd2SBhanu Gollapudi return NULL; 467853e2bd2SBhanu Gollapudi } 468853e2bd2SBhanu Gollapudi 469853e2bd2SBhanu Gollapudi listp = (struct list_head *) 4700ea5c275SBhanu Gollapudi cmd_mgr->free_list[index].next; 471853e2bd2SBhanu Gollapudi list_del_init(listp); 472853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *) listp; 473853e2bd2SBhanu Gollapudi xid = io_req->xid; 474853e2bd2SBhanu Gollapudi cmd_mgr->cmds[xid] = io_req; 475853e2bd2SBhanu Gollapudi atomic_inc(&tgt->num_active_ios); 476619c5cb6SVlad Zolotarov atomic_dec(&tgt->free_sqes); 4770ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 478853e2bd2SBhanu Gollapudi 479853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link); 480853e2bd2SBhanu Gollapudi 481853e2bd2SBhanu Gollapudi io_req->port = port; 482853e2bd2SBhanu Gollapudi io_req->cmd_mgr = cmd_mgr; 483853e2bd2SBhanu Gollapudi io_req->req_flags = 0; 484853e2bd2SBhanu Gollapudi io_req->cmd_type = type; 485853e2bd2SBhanu Gollapudi 486853e2bd2SBhanu Gollapudi /* Bind io_bdt for this io_req */ 487853e2bd2SBhanu Gollapudi /* Have a static link between io_req and io_bdt_pool */ 488853e2bd2SBhanu Gollapudi bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 489853e2bd2SBhanu Gollapudi bd_tbl->io_req = io_req; 490853e2bd2SBhanu Gollapudi 491853e2bd2SBhanu Gollapudi /* Hold the io_req against deletion */ 492853e2bd2SBhanu Gollapudi kref_init(&io_req->refcount); 493853e2bd2SBhanu Gollapudi return io_req; 494853e2bd2SBhanu Gollapudi } 495aea71a02SBhanu Prakash Gollapudi 496aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt) 497853e2bd2SBhanu Gollapudi { 498853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port; 499aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv; 500aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; 501853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 502853e2bd2SBhanu Gollapudi struct list_head *listp; 503853e2bd2SBhanu Gollapudi struct io_bdt *bd_tbl; 504619c5cb6SVlad Zolotarov u32 free_sqes; 505853e2bd2SBhanu Gollapudi u32 max_sqes; 506853e2bd2SBhanu Gollapudi u16 xid; 5070ea5c275SBhanu Gollapudi int index = get_cpu(); 508853e2bd2SBhanu Gollapudi 509853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_SCSI_MAX_SQES; 510853e2bd2SBhanu Gollapudi /* 511853e2bd2SBhanu Gollapudi * NOTE: Free list insertions and deletions are protected with 512853e2bd2SBhanu Gollapudi * cmgr lock 513853e2bd2SBhanu Gollapudi */ 5140ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]); 515619c5cb6SVlad Zolotarov free_sqes = atomic_read(&tgt->free_sqes); 5160ea5c275SBhanu Gollapudi if ((list_empty(&cmd_mgr->free_list[index])) || 517619c5cb6SVlad Zolotarov (tgt->num_active_ios.counter >= max_sqes) || 518619c5cb6SVlad Zolotarov (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { 5190ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 5200ea5c275SBhanu Gollapudi put_cpu(); 521853e2bd2SBhanu Gollapudi return NULL; 522853e2bd2SBhanu Gollapudi } 523853e2bd2SBhanu Gollapudi 524853e2bd2SBhanu Gollapudi listp = (struct list_head *) 5250ea5c275SBhanu Gollapudi cmd_mgr->free_list[index].next; 526853e2bd2SBhanu Gollapudi list_del_init(listp); 527853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *) listp; 528853e2bd2SBhanu Gollapudi xid = io_req->xid; 529853e2bd2SBhanu Gollapudi cmd_mgr->cmds[xid] = io_req; 530853e2bd2SBhanu Gollapudi atomic_inc(&tgt->num_active_ios); 531619c5cb6SVlad Zolotarov atomic_dec(&tgt->free_sqes); 5320ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 5330ea5c275SBhanu Gollapudi put_cpu(); 534853e2bd2SBhanu Gollapudi 535853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link); 536853e2bd2SBhanu Gollapudi 537853e2bd2SBhanu Gollapudi io_req->port = port; 538853e2bd2SBhanu Gollapudi io_req->cmd_mgr = cmd_mgr; 539853e2bd2SBhanu Gollapudi io_req->req_flags = 0; 540853e2bd2SBhanu Gollapudi 541853e2bd2SBhanu Gollapudi /* Bind io_bdt for this io_req */ 542853e2bd2SBhanu Gollapudi /* Have a static link between io_req and io_bdt_pool */ 543853e2bd2SBhanu Gollapudi bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 544853e2bd2SBhanu Gollapudi bd_tbl->io_req = io_req; 545853e2bd2SBhanu Gollapudi 546853e2bd2SBhanu Gollapudi /* Hold the io_req against deletion */ 547853e2bd2SBhanu Gollapudi kref_init(&io_req->refcount); 548853e2bd2SBhanu Gollapudi return io_req; 549853e2bd2SBhanu Gollapudi } 550853e2bd2SBhanu Gollapudi 551853e2bd2SBhanu Gollapudi void bnx2fc_cmd_release(struct kref *ref) 552853e2bd2SBhanu Gollapudi { 553853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req = container_of(ref, 554853e2bd2SBhanu Gollapudi struct bnx2fc_cmd, refcount); 555853e2bd2SBhanu Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; 5560ea5c275SBhanu Gollapudi int index; 557853e2bd2SBhanu Gollapudi 5580ea5c275SBhanu Gollapudi if (io_req->cmd_type == BNX2FC_SCSI_CMD) 5590ea5c275SBhanu Gollapudi index = io_req->xid % num_possible_cpus(); 5600ea5c275SBhanu Gollapudi else 5610ea5c275SBhanu Gollapudi index = RESERVE_FREE_LIST_INDEX; 5620ea5c275SBhanu Gollapudi 5630ea5c275SBhanu Gollapudi 5640ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]); 565853e2bd2SBhanu Gollapudi if (io_req->cmd_type != BNX2FC_SCSI_CMD) 566853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 567853e2bd2SBhanu Gollapudi cmd_mgr->cmds[io_req->xid] = NULL; 568853e2bd2SBhanu Gollapudi /* Delete IO from retire queue */ 569853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 570853e2bd2SBhanu Gollapudi /* Add it to the free list */ 571853e2bd2SBhanu Gollapudi list_add(&io_req->link, 5720ea5c275SBhanu Gollapudi &cmd_mgr->free_list[index]); 573853e2bd2SBhanu Gollapudi atomic_dec(&io_req->tgt->num_active_ios); 5740ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 5750ea5c275SBhanu Gollapudi 576853e2bd2SBhanu Gollapudi } 577853e2bd2SBhanu Gollapudi 578853e2bd2SBhanu Gollapudi static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) 579853e2bd2SBhanu Gollapudi { 580853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); 581aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 582aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 583853e2bd2SBhanu Gollapudi size_t sz = sizeof(struct fcoe_bd_ctx); 584853e2bd2SBhanu Gollapudi 585853e2bd2SBhanu Gollapudi /* clear tm flags */ 586853e2bd2SBhanu Gollapudi mp_req->tm_flags = 0; 587853e2bd2SBhanu Gollapudi if (mp_req->mp_req_bd) { 588853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, sz, 589853e2bd2SBhanu Gollapudi mp_req->mp_req_bd, 590853e2bd2SBhanu Gollapudi mp_req->mp_req_bd_dma); 591853e2bd2SBhanu Gollapudi mp_req->mp_req_bd = NULL; 592853e2bd2SBhanu Gollapudi } 593853e2bd2SBhanu Gollapudi if (mp_req->mp_resp_bd) { 594853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, sz, 595853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd, 596853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd_dma); 597853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd = NULL; 598853e2bd2SBhanu Gollapudi } 599853e2bd2SBhanu Gollapudi if (mp_req->req_buf) { 600be1fefc2SMichael Chan dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 601853e2bd2SBhanu Gollapudi mp_req->req_buf, 602853e2bd2SBhanu Gollapudi mp_req->req_buf_dma); 603853e2bd2SBhanu Gollapudi mp_req->req_buf = NULL; 604853e2bd2SBhanu Gollapudi } 605853e2bd2SBhanu Gollapudi if (mp_req->resp_buf) { 606be1fefc2SMichael Chan dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 607853e2bd2SBhanu Gollapudi mp_req->resp_buf, 608853e2bd2SBhanu Gollapudi mp_req->resp_buf_dma); 609853e2bd2SBhanu Gollapudi mp_req->resp_buf = NULL; 610853e2bd2SBhanu Gollapudi } 611853e2bd2SBhanu Gollapudi } 612853e2bd2SBhanu Gollapudi 613853e2bd2SBhanu Gollapudi int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) 614853e2bd2SBhanu Gollapudi { 615853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *mp_req; 616853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *mp_req_bd; 617853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *mp_resp_bd; 618aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 619aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 620853e2bd2SBhanu Gollapudi dma_addr_t addr; 621853e2bd2SBhanu Gollapudi size_t sz; 622853e2bd2SBhanu Gollapudi 623853e2bd2SBhanu Gollapudi mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 624853e2bd2SBhanu Gollapudi memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); 625853e2bd2SBhanu Gollapudi 6261fffa199SChad Dupuis if (io_req->cmd_type != BNX2FC_ELS) { 627853e2bd2SBhanu Gollapudi mp_req->req_len = sizeof(struct fcp_cmnd); 628853e2bd2SBhanu Gollapudi io_req->data_xfer_len = mp_req->req_len; 6291fffa199SChad Dupuis } else 6301fffa199SChad Dupuis mp_req->req_len = io_req->data_xfer_len; 6311fffa199SChad Dupuis 632be1fefc2SMichael Chan mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 633853e2bd2SBhanu Gollapudi &mp_req->req_buf_dma, 634853e2bd2SBhanu Gollapudi GFP_ATOMIC); 635853e2bd2SBhanu Gollapudi if (!mp_req->req_buf) { 636853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP req buffer\n"); 637853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 638853e2bd2SBhanu Gollapudi return FAILED; 639853e2bd2SBhanu Gollapudi } 640853e2bd2SBhanu Gollapudi 641be1fefc2SMichael Chan mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 642853e2bd2SBhanu Gollapudi &mp_req->resp_buf_dma, 643853e2bd2SBhanu Gollapudi GFP_ATOMIC); 644853e2bd2SBhanu Gollapudi if (!mp_req->resp_buf) { 645853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc TM resp buffer\n"); 646853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 647853e2bd2SBhanu Gollapudi return FAILED; 648853e2bd2SBhanu Gollapudi } 649be1fefc2SMichael Chan memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE); 650be1fefc2SMichael Chan memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE); 651853e2bd2SBhanu Gollapudi 652853e2bd2SBhanu Gollapudi /* Allocate and map mp_req_bd and mp_resp_bd */ 653853e2bd2SBhanu Gollapudi sz = sizeof(struct fcoe_bd_ctx); 654853e2bd2SBhanu Gollapudi mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 655853e2bd2SBhanu Gollapudi &mp_req->mp_req_bd_dma, 656853e2bd2SBhanu Gollapudi GFP_ATOMIC); 657853e2bd2SBhanu Gollapudi if (!mp_req->mp_req_bd) { 658853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP req bd\n"); 659853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 660853e2bd2SBhanu Gollapudi return FAILED; 661853e2bd2SBhanu Gollapudi } 662853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 663853e2bd2SBhanu Gollapudi &mp_req->mp_resp_bd_dma, 664853e2bd2SBhanu Gollapudi GFP_ATOMIC); 665b0d5e15cSJulia Lawall if (!mp_req->mp_resp_bd) { 666853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP resp bd\n"); 667853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 668853e2bd2SBhanu Gollapudi return FAILED; 669853e2bd2SBhanu Gollapudi } 670853e2bd2SBhanu Gollapudi /* Fill bd table */ 671853e2bd2SBhanu Gollapudi addr = mp_req->req_buf_dma; 672853e2bd2SBhanu Gollapudi mp_req_bd = mp_req->mp_req_bd; 673853e2bd2SBhanu Gollapudi mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; 674853e2bd2SBhanu Gollapudi mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); 675be1fefc2SMichael Chan mp_req_bd->buf_len = CNIC_PAGE_SIZE; 676853e2bd2SBhanu Gollapudi mp_req_bd->flags = 0; 677853e2bd2SBhanu Gollapudi 678853e2bd2SBhanu Gollapudi /* 679853e2bd2SBhanu Gollapudi * MP buffer is either a task mgmt command or an ELS. 680853e2bd2SBhanu Gollapudi * So the assumption is that it consumes a single bd 681853e2bd2SBhanu Gollapudi * entry in the bd table 682853e2bd2SBhanu Gollapudi */ 683853e2bd2SBhanu Gollapudi mp_resp_bd = mp_req->mp_resp_bd; 684853e2bd2SBhanu Gollapudi addr = mp_req->resp_buf_dma; 685853e2bd2SBhanu Gollapudi mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; 686853e2bd2SBhanu Gollapudi mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); 687be1fefc2SMichael Chan mp_resp_bd->buf_len = CNIC_PAGE_SIZE; 688853e2bd2SBhanu Gollapudi mp_resp_bd->flags = 0; 689853e2bd2SBhanu Gollapudi 690853e2bd2SBhanu Gollapudi return SUCCESS; 691853e2bd2SBhanu Gollapudi } 692853e2bd2SBhanu Gollapudi 693853e2bd2SBhanu Gollapudi static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 694853e2bd2SBhanu Gollapudi { 695853e2bd2SBhanu Gollapudi struct fc_lport *lport; 69633c7da05SJulia Lawall struct fc_rport *rport; 69733c7da05SJulia Lawall struct fc_rport_libfc_priv *rp; 698853e2bd2SBhanu Gollapudi struct fcoe_port *port; 699aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 700853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt; 701853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 702853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *tm_req; 703853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 704853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 705853e2bd2SBhanu Gollapudi struct Scsi_Host *host = sc_cmd->device->host; 706853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr; 707853e2bd2SBhanu Gollapudi struct fcp_cmnd *fcp_cmnd; 708853e2bd2SBhanu Gollapudi int task_idx, index; 709853e2bd2SBhanu Gollapudi int rc = SUCCESS; 710853e2bd2SBhanu Gollapudi u16 xid; 711853e2bd2SBhanu Gollapudi u32 sid, did; 712853e2bd2SBhanu Gollapudi unsigned long start = jiffies; 713853e2bd2SBhanu Gollapudi 714853e2bd2SBhanu Gollapudi lport = shost_priv(host); 71533c7da05SJulia Lawall rport = starget_to_rport(scsi_target(sc_cmd->device)); 716853e2bd2SBhanu Gollapudi port = lport_priv(lport); 717aea71a02SBhanu Prakash Gollapudi interface = port->priv; 718853e2bd2SBhanu Gollapudi 719853e2bd2SBhanu Gollapudi if (rport == NULL) { 720b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "device_reset: rport is NULL\n"); 721853e2bd2SBhanu Gollapudi rc = FAILED; 722853e2bd2SBhanu Gollapudi goto tmf_err; 723853e2bd2SBhanu Gollapudi } 72433c7da05SJulia Lawall rp = rport->dd_data; 725853e2bd2SBhanu Gollapudi 726853e2bd2SBhanu Gollapudi rc = fc_block_scsi_eh(sc_cmd); 727853e2bd2SBhanu Gollapudi if (rc) 728853e2bd2SBhanu Gollapudi return rc; 729853e2bd2SBhanu Gollapudi 730853e2bd2SBhanu Gollapudi if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 731853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "device_reset: link is not ready\n"); 732853e2bd2SBhanu Gollapudi rc = FAILED; 733853e2bd2SBhanu Gollapudi goto tmf_err; 734853e2bd2SBhanu Gollapudi } 735853e2bd2SBhanu Gollapudi /* rport and tgt are allocated together, so tgt should be non-NULL */ 736853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1]; 737853e2bd2SBhanu Gollapudi 738853e2bd2SBhanu Gollapudi if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { 739853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); 740853e2bd2SBhanu Gollapudi rc = FAILED; 741853e2bd2SBhanu Gollapudi goto tmf_err; 742853e2bd2SBhanu Gollapudi } 743853e2bd2SBhanu Gollapudi retry_tmf: 744853e2bd2SBhanu Gollapudi io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); 745853e2bd2SBhanu Gollapudi if (!io_req) { 746853e2bd2SBhanu Gollapudi if (time_after(jiffies, start + HZ)) { 747853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tmf: Failed TMF"); 748853e2bd2SBhanu Gollapudi rc = FAILED; 749853e2bd2SBhanu Gollapudi goto tmf_err; 750853e2bd2SBhanu Gollapudi } 751853e2bd2SBhanu Gollapudi msleep(20); 752853e2bd2SBhanu Gollapudi goto retry_tmf; 753853e2bd2SBhanu Gollapudi } 754853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 755853e2bd2SBhanu Gollapudi io_req->sc_cmd = sc_cmd; 756853e2bd2SBhanu Gollapudi io_req->port = port; 757853e2bd2SBhanu Gollapudi io_req->tgt = tgt; 758853e2bd2SBhanu Gollapudi 759853e2bd2SBhanu Gollapudi tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 760853e2bd2SBhanu Gollapudi 761853e2bd2SBhanu Gollapudi rc = bnx2fc_init_mp_req(io_req); 762853e2bd2SBhanu Gollapudi if (rc == FAILED) { 763853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); 764bd4d5de8SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 765853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 766bd4d5de8SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 767853e2bd2SBhanu Gollapudi goto tmf_err; 768853e2bd2SBhanu Gollapudi } 769853e2bd2SBhanu Gollapudi 770853e2bd2SBhanu Gollapudi /* Set TM flags */ 771853e2bd2SBhanu Gollapudi io_req->io_req_flags = 0; 772853e2bd2SBhanu Gollapudi tm_req->tm_flags = tm_flags; 773853e2bd2SBhanu Gollapudi 774853e2bd2SBhanu Gollapudi /* Fill FCP_CMND */ 775853e2bd2SBhanu Gollapudi bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); 776853e2bd2SBhanu Gollapudi fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; 777853e2bd2SBhanu Gollapudi memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); 778853e2bd2SBhanu Gollapudi fcp_cmnd->fc_dl = 0; 779853e2bd2SBhanu Gollapudi 780853e2bd2SBhanu Gollapudi /* Fill FC header */ 781853e2bd2SBhanu Gollapudi fc_hdr = &(tm_req->req_fc_hdr); 782853e2bd2SBhanu Gollapudi sid = tgt->sid; 783853e2bd2SBhanu Gollapudi did = rport->port_id; 784853e2bd2SBhanu Gollapudi __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, 785853e2bd2SBhanu Gollapudi FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 786853e2bd2SBhanu Gollapudi FC_FC_SEQ_INIT, 0); 787853e2bd2SBhanu Gollapudi /* Obtain exchange id */ 788853e2bd2SBhanu Gollapudi xid = io_req->xid; 789853e2bd2SBhanu Gollapudi 790853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); 791853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 792853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 793853e2bd2SBhanu Gollapudi 794853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 795aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 796aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 797853e2bd2SBhanu Gollapudi task = &(task_page[index]); 798853e2bd2SBhanu Gollapudi bnx2fc_init_mp_task(io_req, task); 799853e2bd2SBhanu Gollapudi 800853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = (char *)io_req; 801853e2bd2SBhanu Gollapudi 802853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 803853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 804853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 805853e2bd2SBhanu Gollapudi 806853e2bd2SBhanu Gollapudi /* Enqueue the io_req to active_tm_queue */ 807853e2bd2SBhanu Gollapudi io_req->on_tmf_queue = 1; 808853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->active_tm_queue); 809853e2bd2SBhanu Gollapudi 810853e2bd2SBhanu Gollapudi init_completion(&io_req->tm_done); 811853e2bd2SBhanu Gollapudi io_req->wait_for_comp = 1; 812853e2bd2SBhanu Gollapudi 813853e2bd2SBhanu Gollapudi /* Ring doorbell */ 814853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 815853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 816853e2bd2SBhanu Gollapudi 817853e2bd2SBhanu Gollapudi rc = wait_for_completion_timeout(&io_req->tm_done, 818853e2bd2SBhanu Gollapudi BNX2FC_TM_TIMEOUT * HZ); 819853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 820853e2bd2SBhanu Gollapudi 821853e2bd2SBhanu Gollapudi io_req->wait_for_comp = 0; 82292886c9cSBhanu Prakash Gollapudi if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) { 823853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); 82492886c9cSBhanu Prakash Gollapudi if (io_req->on_tmf_queue) { 82592886c9cSBhanu Prakash Gollapudi list_del_init(&io_req->link); 82692886c9cSBhanu Prakash Gollapudi io_req->on_tmf_queue = 0; 82792886c9cSBhanu Prakash Gollapudi } 82892886c9cSBhanu Prakash Gollapudi io_req->wait_for_comp = 1; 82992886c9cSBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req); 83092886c9cSBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 83192886c9cSBhanu Prakash Gollapudi rc = wait_for_completion_timeout(&io_req->tm_done, 83292886c9cSBhanu Prakash Gollapudi BNX2FC_FW_TIMEOUT); 83392886c9cSBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 83492886c9cSBhanu Prakash Gollapudi io_req->wait_for_comp = 0; 83592886c9cSBhanu Prakash Gollapudi if (!rc) 83692886c9cSBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 83792886c9cSBhanu Prakash Gollapudi } 838853e2bd2SBhanu Gollapudi 839853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 840853e2bd2SBhanu Gollapudi 841853e2bd2SBhanu Gollapudi if (!rc) { 842b2a554ffSBhanu Prakash Gollapudi BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n"); 843853e2bd2SBhanu Gollapudi rc = FAILED; 844853e2bd2SBhanu Gollapudi } else { 845b2a554ffSBhanu Prakash Gollapudi BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n"); 846853e2bd2SBhanu Gollapudi rc = SUCCESS; 847853e2bd2SBhanu Gollapudi } 848853e2bd2SBhanu Gollapudi tmf_err: 849853e2bd2SBhanu Gollapudi return rc; 850853e2bd2SBhanu Gollapudi } 851853e2bd2SBhanu Gollapudi 852853e2bd2SBhanu Gollapudi int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) 853853e2bd2SBhanu Gollapudi { 854853e2bd2SBhanu Gollapudi struct fc_lport *lport; 855853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 856853e2bd2SBhanu Gollapudi struct fc_rport *rport = tgt->rport; 857853e2bd2SBhanu Gollapudi struct fc_rport_priv *rdata = tgt->rdata; 858aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 859853e2bd2SBhanu Gollapudi struct fcoe_port *port; 860853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *abts_io_req; 861853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 862853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 863853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr; 864853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *abts_req; 865853e2bd2SBhanu Gollapudi int task_idx, index; 866853e2bd2SBhanu Gollapudi u32 sid, did; 867853e2bd2SBhanu Gollapudi u16 xid; 868853e2bd2SBhanu Gollapudi int rc = SUCCESS; 869853e2bd2SBhanu Gollapudi u32 r_a_tov = rdata->r_a_tov; 870853e2bd2SBhanu Gollapudi 871853e2bd2SBhanu Gollapudi /* called with tgt_lock held */ 872853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); 873853e2bd2SBhanu Gollapudi 874853e2bd2SBhanu Gollapudi port = io_req->port; 875aea71a02SBhanu Prakash Gollapudi interface = port->priv; 876853e2bd2SBhanu Gollapudi lport = port->lport; 877853e2bd2SBhanu Gollapudi 878853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 879853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); 880853e2bd2SBhanu Gollapudi rc = FAILED; 881853e2bd2SBhanu Gollapudi goto abts_err; 882853e2bd2SBhanu Gollapudi } 883853e2bd2SBhanu Gollapudi 884853e2bd2SBhanu Gollapudi if (rport == NULL) { 885b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "initiate_abts: rport is NULL\n"); 886853e2bd2SBhanu Gollapudi rc = FAILED; 887853e2bd2SBhanu Gollapudi goto abts_err; 888853e2bd2SBhanu Gollapudi } 889853e2bd2SBhanu Gollapudi 890853e2bd2SBhanu Gollapudi if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 891853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); 892853e2bd2SBhanu Gollapudi rc = FAILED; 893853e2bd2SBhanu Gollapudi goto abts_err; 894853e2bd2SBhanu Gollapudi } 895853e2bd2SBhanu Gollapudi 896853e2bd2SBhanu Gollapudi abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); 897853e2bd2SBhanu Gollapudi if (!abts_io_req) { 898853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "abts: couldnt allocate cmd\n"); 899853e2bd2SBhanu Gollapudi rc = FAILED; 900853e2bd2SBhanu Gollapudi goto abts_err; 901853e2bd2SBhanu Gollapudi } 902853e2bd2SBhanu Gollapudi 903853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 904853e2bd2SBhanu Gollapudi abts_io_req->sc_cmd = NULL; 905853e2bd2SBhanu Gollapudi abts_io_req->port = port; 906853e2bd2SBhanu Gollapudi abts_io_req->tgt = tgt; 907853e2bd2SBhanu Gollapudi abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ 908853e2bd2SBhanu Gollapudi 909853e2bd2SBhanu Gollapudi abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); 910853e2bd2SBhanu Gollapudi memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); 911853e2bd2SBhanu Gollapudi 912853e2bd2SBhanu Gollapudi /* Fill FC header */ 913853e2bd2SBhanu Gollapudi fc_hdr = &(abts_req->req_fc_hdr); 914853e2bd2SBhanu Gollapudi 915853e2bd2SBhanu Gollapudi /* Obtain oxid and rxid for the original exchange to be aborted */ 916853e2bd2SBhanu Gollapudi fc_hdr->fh_ox_id = htons(io_req->xid); 917619c5cb6SVlad Zolotarov fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id); 918853e2bd2SBhanu Gollapudi 919853e2bd2SBhanu Gollapudi sid = tgt->sid; 920853e2bd2SBhanu Gollapudi did = rport->port_id; 921853e2bd2SBhanu Gollapudi 922853e2bd2SBhanu Gollapudi __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, 923853e2bd2SBhanu Gollapudi FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 924853e2bd2SBhanu Gollapudi FC_FC_SEQ_INIT, 0); 925853e2bd2SBhanu Gollapudi 926853e2bd2SBhanu Gollapudi xid = abts_io_req->xid; 927853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); 928853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 929853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 930853e2bd2SBhanu Gollapudi 931853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 932aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 933aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 934853e2bd2SBhanu Gollapudi task = &(task_page[index]); 935853e2bd2SBhanu Gollapudi bnx2fc_init_mp_task(abts_io_req, task); 936853e2bd2SBhanu Gollapudi 937853e2bd2SBhanu Gollapudi /* 938853e2bd2SBhanu Gollapudi * ABTS task is a temporary task that will be cleaned up 939853e2bd2SBhanu Gollapudi * irrespective of ABTS response. We need to start the timer 940853e2bd2SBhanu Gollapudi * for the original exchange, as the CQE is posted for the original 941853e2bd2SBhanu Gollapudi * IO request. 942853e2bd2SBhanu Gollapudi * 943853e2bd2SBhanu Gollapudi * Timer for ABTS is started only when it is originated by a 944853e2bd2SBhanu Gollapudi * TM request. For the ABTS issued as part of ULP timeout, 945853e2bd2SBhanu Gollapudi * scsi-ml maintains the timers. 946853e2bd2SBhanu Gollapudi */ 947853e2bd2SBhanu Gollapudi 948853e2bd2SBhanu Gollapudi /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ 949853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); 950853e2bd2SBhanu Gollapudi 951853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 952853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 953853e2bd2SBhanu Gollapudi 954853e2bd2SBhanu Gollapudi /* Ring doorbell */ 955853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 956853e2bd2SBhanu Gollapudi 957853e2bd2SBhanu Gollapudi abts_err: 958853e2bd2SBhanu Gollapudi return rc; 959853e2bd2SBhanu Gollapudi } 960853e2bd2SBhanu Gollapudi 9616c5a7ce4SBhanu Prakash Gollapudi int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset, 9626c5a7ce4SBhanu Prakash Gollapudi enum fc_rctl r_ctl) 9636c5a7ce4SBhanu Prakash Gollapudi { 9646c5a7ce4SBhanu Prakash Gollapudi struct fc_lport *lport; 9656c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = orig_io_req->tgt; 9666c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 9676c5a7ce4SBhanu Prakash Gollapudi struct fcoe_port *port; 9686c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_cmd *seq_clnp_req; 9696c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task; 9706c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task_page; 9716c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_els_cb_arg *cb_arg = NULL; 9726c5a7ce4SBhanu Prakash Gollapudi int task_idx, index; 9736c5a7ce4SBhanu Prakash Gollapudi u16 xid; 9746c5a7ce4SBhanu Prakash Gollapudi int rc = 0; 9756c5a7ce4SBhanu Prakash Gollapudi 9766c5a7ce4SBhanu Prakash Gollapudi BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n", 9776c5a7ce4SBhanu Prakash Gollapudi orig_io_req->xid); 9786c5a7ce4SBhanu Prakash Gollapudi kref_get(&orig_io_req->refcount); 9796c5a7ce4SBhanu Prakash Gollapudi 9806c5a7ce4SBhanu Prakash Gollapudi port = orig_io_req->port; 9816c5a7ce4SBhanu Prakash Gollapudi interface = port->priv; 9826c5a7ce4SBhanu Prakash Gollapudi lport = port->lport; 9836c5a7ce4SBhanu Prakash Gollapudi 9846c5a7ce4SBhanu Prakash Gollapudi cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); 9856c5a7ce4SBhanu Prakash Gollapudi if (!cb_arg) { 9866c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n"); 9876c5a7ce4SBhanu Prakash Gollapudi rc = -ENOMEM; 9886c5a7ce4SBhanu Prakash Gollapudi goto cleanup_err; 9896c5a7ce4SBhanu Prakash Gollapudi } 9906c5a7ce4SBhanu Prakash Gollapudi 9916c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP); 9926c5a7ce4SBhanu Prakash Gollapudi if (!seq_clnp_req) { 9936c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); 9946c5a7ce4SBhanu Prakash Gollapudi rc = -ENOMEM; 9956c5a7ce4SBhanu Prakash Gollapudi kfree(cb_arg); 9966c5a7ce4SBhanu Prakash Gollapudi goto cleanup_err; 9976c5a7ce4SBhanu Prakash Gollapudi } 9986c5a7ce4SBhanu Prakash Gollapudi /* Initialize rest of io_req fields */ 9996c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->sc_cmd = NULL; 10006c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->port = port; 10016c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->tgt = tgt; 10026c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */ 10036c5a7ce4SBhanu Prakash Gollapudi 10046c5a7ce4SBhanu Prakash Gollapudi xid = seq_clnp_req->xid; 10056c5a7ce4SBhanu Prakash Gollapudi 10066c5a7ce4SBhanu Prakash Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 10076c5a7ce4SBhanu Prakash Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 10086c5a7ce4SBhanu Prakash Gollapudi 10096c5a7ce4SBhanu Prakash Gollapudi /* Initialize task context for this IO request */ 10106c5a7ce4SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 10116c5a7ce4SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 10126c5a7ce4SBhanu Prakash Gollapudi task = &(task_page[index]); 10136c5a7ce4SBhanu Prakash Gollapudi cb_arg->aborted_io_req = orig_io_req; 10146c5a7ce4SBhanu Prakash Gollapudi cb_arg->io_req = seq_clnp_req; 10156c5a7ce4SBhanu Prakash Gollapudi cb_arg->r_ctl = r_ctl; 10166c5a7ce4SBhanu Prakash Gollapudi cb_arg->offset = offset; 10176c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->cb_arg = cb_arg; 10186c5a7ce4SBhanu Prakash Gollapudi 10196c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "call init_seq_cleanup_task\n"); 10206c5a7ce4SBhanu Prakash Gollapudi bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset); 10216c5a7ce4SBhanu Prakash Gollapudi 10226c5a7ce4SBhanu Prakash Gollapudi /* Obtain free SQ entry */ 10236c5a7ce4SBhanu Prakash Gollapudi bnx2fc_add_2_sq(tgt, xid); 10246c5a7ce4SBhanu Prakash Gollapudi 10256c5a7ce4SBhanu Prakash Gollapudi /* Ring doorbell */ 10266c5a7ce4SBhanu Prakash Gollapudi bnx2fc_ring_doorbell(tgt); 10276c5a7ce4SBhanu Prakash Gollapudi cleanup_err: 10286c5a7ce4SBhanu Prakash Gollapudi return rc; 10296c5a7ce4SBhanu Prakash Gollapudi } 10306c5a7ce4SBhanu Prakash Gollapudi 1031853e2bd2SBhanu Gollapudi int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) 1032853e2bd2SBhanu Gollapudi { 1033853e2bd2SBhanu Gollapudi struct fc_lport *lport; 1034853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1035aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 1036853e2bd2SBhanu Gollapudi struct fcoe_port *port; 1037853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *cleanup_io_req; 1038853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 1039853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 1040853e2bd2SBhanu Gollapudi int task_idx, index; 1041853e2bd2SBhanu Gollapudi u16 xid, orig_xid; 1042853e2bd2SBhanu Gollapudi int rc = 0; 1043853e2bd2SBhanu Gollapudi 1044853e2bd2SBhanu Gollapudi /* ASSUMPTION: called with tgt_lock held */ 1045853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); 1046853e2bd2SBhanu Gollapudi 1047853e2bd2SBhanu Gollapudi port = io_req->port; 1048aea71a02SBhanu Prakash Gollapudi interface = port->priv; 1049853e2bd2SBhanu Gollapudi lport = port->lport; 1050853e2bd2SBhanu Gollapudi 1051853e2bd2SBhanu Gollapudi cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); 1052853e2bd2SBhanu Gollapudi if (!cleanup_io_req) { 1053853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); 1054853e2bd2SBhanu Gollapudi rc = -1; 1055853e2bd2SBhanu Gollapudi goto cleanup_err; 1056853e2bd2SBhanu Gollapudi } 1057853e2bd2SBhanu Gollapudi 1058853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 1059853e2bd2SBhanu Gollapudi cleanup_io_req->sc_cmd = NULL; 1060853e2bd2SBhanu Gollapudi cleanup_io_req->port = port; 1061853e2bd2SBhanu Gollapudi cleanup_io_req->tgt = tgt; 1062853e2bd2SBhanu Gollapudi cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ 1063853e2bd2SBhanu Gollapudi 1064853e2bd2SBhanu Gollapudi xid = cleanup_io_req->xid; 1065853e2bd2SBhanu Gollapudi 1066853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 1067853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 1068853e2bd2SBhanu Gollapudi 1069853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 1070aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 1071aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 1072853e2bd2SBhanu Gollapudi task = &(task_page[index]); 1073853e2bd2SBhanu Gollapudi orig_xid = io_req->xid; 1074853e2bd2SBhanu Gollapudi 1075853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); 1076853e2bd2SBhanu Gollapudi 1077853e2bd2SBhanu Gollapudi bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); 1078853e2bd2SBhanu Gollapudi 1079853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 1080853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 1081853e2bd2SBhanu Gollapudi 1082853e2bd2SBhanu Gollapudi /* Ring doorbell */ 1083853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 1084853e2bd2SBhanu Gollapudi 1085853e2bd2SBhanu Gollapudi cleanup_err: 1086853e2bd2SBhanu Gollapudi return rc; 1087853e2bd2SBhanu Gollapudi } 1088853e2bd2SBhanu Gollapudi 1089853e2bd2SBhanu Gollapudi /** 1090853e2bd2SBhanu Gollapudi * bnx2fc_eh_target_reset: Reset a target 1091853e2bd2SBhanu Gollapudi * 1092853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI command 1093853e2bd2SBhanu Gollapudi * 1094853e2bd2SBhanu Gollapudi * Set from SCSI host template to send task mgmt command to the target 1095853e2bd2SBhanu Gollapudi * and wait for the response 1096853e2bd2SBhanu Gollapudi */ 1097853e2bd2SBhanu Gollapudi int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) 1098853e2bd2SBhanu Gollapudi { 1099853e2bd2SBhanu Gollapudi return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); 1100853e2bd2SBhanu Gollapudi } 1101853e2bd2SBhanu Gollapudi 1102853e2bd2SBhanu Gollapudi /** 1103853e2bd2SBhanu Gollapudi * bnx2fc_eh_device_reset - Reset a single LUN 1104853e2bd2SBhanu Gollapudi * 1105853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI command 1106853e2bd2SBhanu Gollapudi * 1107853e2bd2SBhanu Gollapudi * Set from SCSI host template to send task mgmt command to the target 1108853e2bd2SBhanu Gollapudi * and wait for the response 1109853e2bd2SBhanu Gollapudi */ 1110853e2bd2SBhanu Gollapudi int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) 1111853e2bd2SBhanu Gollapudi { 1112853e2bd2SBhanu Gollapudi return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); 1113853e2bd2SBhanu Gollapudi } 1114853e2bd2SBhanu Gollapudi 1115c1bb4f33SBhanu Prakash Gollapudi int bnx2fc_expl_logo(struct fc_lport *lport, struct bnx2fc_cmd *io_req) 1116c1bb4f33SBhanu Prakash Gollapudi { 1117c1bb4f33SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1118c1bb4f33SBhanu Prakash Gollapudi struct fc_rport_priv *rdata = tgt->rdata; 1119c1bb4f33SBhanu Prakash Gollapudi int logo_issued; 1120c1bb4f33SBhanu Prakash Gollapudi int rc = SUCCESS; 1121c1bb4f33SBhanu Prakash Gollapudi int wait_cnt = 0; 1122c1bb4f33SBhanu Prakash Gollapudi 1123c1bb4f33SBhanu Prakash Gollapudi BNX2FC_IO_DBG(io_req, "Expl logo - tgt flags = 0x%lx\n", 1124c1bb4f33SBhanu Prakash Gollapudi tgt->flags); 1125c1bb4f33SBhanu Prakash Gollapudi logo_issued = test_and_set_bit(BNX2FC_FLAG_EXPL_LOGO, 1126c1bb4f33SBhanu Prakash Gollapudi &tgt->flags); 1127c1bb4f33SBhanu Prakash Gollapudi io_req->wait_for_comp = 1; 1128c1bb4f33SBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req); 1129c1bb4f33SBhanu Prakash Gollapudi 1130c1bb4f33SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1131c1bb4f33SBhanu Prakash Gollapudi 1132c1bb4f33SBhanu Prakash Gollapudi wait_for_completion(&io_req->tm_done); 1133c1bb4f33SBhanu Prakash Gollapudi 1134c1bb4f33SBhanu Prakash Gollapudi io_req->wait_for_comp = 0; 1135c1bb4f33SBhanu Prakash Gollapudi /* 1136c1bb4f33SBhanu Prakash Gollapudi * release the reference taken in eh_abort to allow the 1137c1bb4f33SBhanu Prakash Gollapudi * target to re-login after flushing IOs 1138c1bb4f33SBhanu Prakash Gollapudi */ 1139c1bb4f33SBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1140c1bb4f33SBhanu Prakash Gollapudi 1141c1bb4f33SBhanu Prakash Gollapudi if (!logo_issued) { 1142c1bb4f33SBhanu Prakash Gollapudi clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags); 1143c1bb4f33SBhanu Prakash Gollapudi mutex_lock(&lport->disc.disc_mutex); 1144c1bb4f33SBhanu Prakash Gollapudi lport->tt.rport_logoff(rdata); 1145c1bb4f33SBhanu Prakash Gollapudi mutex_unlock(&lport->disc.disc_mutex); 1146c1bb4f33SBhanu Prakash Gollapudi do { 1147c1bb4f33SBhanu Prakash Gollapudi msleep(BNX2FC_RELOGIN_WAIT_TIME); 1148c1bb4f33SBhanu Prakash Gollapudi if (wait_cnt++ > BNX2FC_RELOGIN_WAIT_CNT) { 1149c1bb4f33SBhanu Prakash Gollapudi rc = FAILED; 1150c1bb4f33SBhanu Prakash Gollapudi break; 1151c1bb4f33SBhanu Prakash Gollapudi } 1152c1bb4f33SBhanu Prakash Gollapudi } while (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)); 1153c1bb4f33SBhanu Prakash Gollapudi } 1154c1bb4f33SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 1155c1bb4f33SBhanu Prakash Gollapudi return rc; 1156c1bb4f33SBhanu Prakash Gollapudi } 1157853e2bd2SBhanu Gollapudi /** 1158853e2bd2SBhanu Gollapudi * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding 1159853e2bd2SBhanu Gollapudi * SCSI command 1160853e2bd2SBhanu Gollapudi * 1161853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI_ML command pointer 1162853e2bd2SBhanu Gollapudi * 1163853e2bd2SBhanu Gollapudi * SCSI abort request handler 1164853e2bd2SBhanu Gollapudi */ 1165853e2bd2SBhanu Gollapudi int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) 1166853e2bd2SBhanu Gollapudi { 1167853e2bd2SBhanu Gollapudi struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1168853e2bd2SBhanu Gollapudi struct fc_rport_libfc_priv *rp = rport->dd_data; 1169853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 1170853e2bd2SBhanu Gollapudi struct fc_lport *lport; 1171853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt; 1172853e2bd2SBhanu Gollapudi int rc = FAILED; 1173853e2bd2SBhanu Gollapudi 1174853e2bd2SBhanu Gollapudi 1175853e2bd2SBhanu Gollapudi rc = fc_block_scsi_eh(sc_cmd); 1176853e2bd2SBhanu Gollapudi if (rc) 1177853e2bd2SBhanu Gollapudi return rc; 1178853e2bd2SBhanu Gollapudi 1179853e2bd2SBhanu Gollapudi lport = shost_priv(sc_cmd->device->host); 1180853e2bd2SBhanu Gollapudi if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1181b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: link not ready\n"); 1182853e2bd2SBhanu Gollapudi return rc; 1183853e2bd2SBhanu Gollapudi } 1184853e2bd2SBhanu Gollapudi 1185853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1]; 1186853e2bd2SBhanu Gollapudi 1187853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); 1188853e2bd2SBhanu Gollapudi 1189853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 1190853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr; 1191853e2bd2SBhanu Gollapudi if (!io_req) { 1192853e2bd2SBhanu Gollapudi /* Command might have just completed */ 1193853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); 1194853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1195853e2bd2SBhanu Gollapudi return SUCCESS; 1196853e2bd2SBhanu Gollapudi } 1197853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", 1198853e2bd2SBhanu Gollapudi io_req->refcount.refcount.counter); 1199853e2bd2SBhanu Gollapudi 1200853e2bd2SBhanu Gollapudi /* Hold IO request across abort processing */ 1201853e2bd2SBhanu Gollapudi kref_get(&io_req->refcount); 1202853e2bd2SBhanu Gollapudi 1203853e2bd2SBhanu Gollapudi BUG_ON(tgt != io_req->tgt); 1204853e2bd2SBhanu Gollapudi 1205853e2bd2SBhanu Gollapudi /* Remove the io_req from the active_q. */ 1206853e2bd2SBhanu Gollapudi /* 1207853e2bd2SBhanu Gollapudi * Task Mgmt functions (LUN RESET & TGT RESET) will not 1208853e2bd2SBhanu Gollapudi * issue an ABTS on this particular IO req, as the 1209853e2bd2SBhanu Gollapudi * io_req is no longer in the active_q. 1210853e2bd2SBhanu Gollapudi */ 1211853e2bd2SBhanu Gollapudi if (tgt->flush_in_prog) { 1212b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1213853e2bd2SBhanu Gollapudi "flush in progress\n", io_req->xid); 1214853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1215853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1216853e2bd2SBhanu Gollapudi return SUCCESS; 1217853e2bd2SBhanu Gollapudi } 1218853e2bd2SBhanu Gollapudi 1219853e2bd2SBhanu Gollapudi if (io_req->on_active_queue == 0) { 1220b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1221853e2bd2SBhanu Gollapudi "not on active_q\n", io_req->xid); 1222853e2bd2SBhanu Gollapudi /* 1223853e2bd2SBhanu Gollapudi * This condition can happen only due to the FW bug, 1224853e2bd2SBhanu Gollapudi * where we do not receive cleanup response from 1225853e2bd2SBhanu Gollapudi * the FW. Handle this case gracefully by erroring 1226853e2bd2SBhanu Gollapudi * back the IO request to SCSI-ml 1227853e2bd2SBhanu Gollapudi */ 1228853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ABORT); 1229853e2bd2SBhanu Gollapudi 1230853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1231853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1232853e2bd2SBhanu Gollapudi return SUCCESS; 1233853e2bd2SBhanu Gollapudi } 1234853e2bd2SBhanu Gollapudi 1235853e2bd2SBhanu Gollapudi /* 1236853e2bd2SBhanu Gollapudi * Only eh_abort processing will remove the IO from 1237853e2bd2SBhanu Gollapudi * active_cmd_q before processing the request. this is 1238853e2bd2SBhanu Gollapudi * done to avoid race conditions between IOs aborted 1239853e2bd2SBhanu Gollapudi * as part of task management completion and eh_abort 1240853e2bd2SBhanu Gollapudi * processing 1241853e2bd2SBhanu Gollapudi */ 1242853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1243853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0; 1244853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */ 1245853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue); 1246853e2bd2SBhanu Gollapudi 1247853e2bd2SBhanu Gollapudi init_completion(&io_req->tm_done); 1248853e2bd2SBhanu Gollapudi 1249c1bb4f33SBhanu Prakash Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 1250b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1251853e2bd2SBhanu Gollapudi "already in abts processing\n", io_req->xid); 125299cc600cSBhanu Prakash Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 125399cc600cSBhanu Prakash Gollapudi kref_put(&io_req->refcount, 125499cc600cSBhanu Prakash Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1255c1bb4f33SBhanu Prakash Gollapudi rc = bnx2fc_expl_logo(lport, io_req); 125621837896SEddie Wai /* This only occurs when an task abort was requested while ABTS 125721837896SEddie Wai is in progress. Setting the IO_CLEANUP flag will skip the 125821837896SEddie Wai RRQ process in the case when the fw generated SCSI_CMD cmpl 125921837896SEddie Wai was a result from the ABTS request rather than the CLEANUP 126021837896SEddie Wai request */ 126121837896SEddie Wai set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags); 1262c1bb4f33SBhanu Prakash Gollapudi goto out; 1263c1bb4f33SBhanu Prakash Gollapudi } 1264c1bb4f33SBhanu Prakash Gollapudi 1265c1bb4f33SBhanu Prakash Gollapudi /* Cancel the current timer running on this io_req */ 1266c1bb4f33SBhanu Prakash Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1267c1bb4f33SBhanu Prakash Gollapudi kref_put(&io_req->refcount, 1268c1bb4f33SBhanu Prakash Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1269c1bb4f33SBhanu Prakash Gollapudi set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); 1270c1bb4f33SBhanu Prakash Gollapudi io_req->wait_for_comp = 1; 1271c1bb4f33SBhanu Prakash Gollapudi rc = bnx2fc_initiate_abts(io_req); 1272c1bb4f33SBhanu Prakash Gollapudi if (rc == FAILED) { 127399cc600cSBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req); 127499cc600cSBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 127599cc600cSBhanu Prakash Gollapudi wait_for_completion(&io_req->tm_done); 127699cc600cSBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 127799cc600cSBhanu Prakash Gollapudi io_req->wait_for_comp = 0; 1278c1bb4f33SBhanu Prakash Gollapudi goto done; 1279853e2bd2SBhanu Gollapudi } 1280853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1281853e2bd2SBhanu Gollapudi 1282853e2bd2SBhanu Gollapudi wait_for_completion(&io_req->tm_done); 1283853e2bd2SBhanu Gollapudi 1284853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 1285853e2bd2SBhanu Gollapudi io_req->wait_for_comp = 0; 12865d78f175SBhanu Prakash Gollapudi if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 12875d78f175SBhanu Prakash Gollapudi BNX2FC_IO_DBG(io_req, "IO completed in a different context\n"); 12885d78f175SBhanu Prakash Gollapudi rc = SUCCESS; 12895d78f175SBhanu Prakash Gollapudi } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1290853e2bd2SBhanu Gollapudi &io_req->req_flags))) { 1291853e2bd2SBhanu Gollapudi /* Let the scsi-ml try to recover this command */ 1292853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", 1293853e2bd2SBhanu Gollapudi io_req->xid); 1294c1bb4f33SBhanu Prakash Gollapudi rc = bnx2fc_expl_logo(lport, io_req); 1295c1bb4f33SBhanu Prakash Gollapudi goto out; 1296853e2bd2SBhanu Gollapudi } else { 1297853e2bd2SBhanu Gollapudi /* 1298853e2bd2SBhanu Gollapudi * We come here even when there was a race condition 1299853e2bd2SBhanu Gollapudi * between timeout and abts completion, and abts 1300853e2bd2SBhanu Gollapudi * completion happens just in time. 1301853e2bd2SBhanu Gollapudi */ 1302853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "abort succeeded\n"); 1303853e2bd2SBhanu Gollapudi rc = SUCCESS; 1304853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ABORT); 1305853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1306853e2bd2SBhanu Gollapudi } 1307c1bb4f33SBhanu Prakash Gollapudi done: 1308853e2bd2SBhanu Gollapudi /* release the reference taken in eh_abort */ 1309853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1310c1bb4f33SBhanu Prakash Gollapudi out: 1311853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1312853e2bd2SBhanu Gollapudi return rc; 1313853e2bd2SBhanu Gollapudi } 1314853e2bd2SBhanu Gollapudi 13156c5a7ce4SBhanu Prakash Gollapudi void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req, 13166c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task, 13176c5a7ce4SBhanu Prakash Gollapudi u8 rx_state) 13186c5a7ce4SBhanu Prakash Gollapudi { 13196c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg; 13206c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req; 13216c5a7ce4SBhanu Prakash Gollapudi u32 offset = cb_arg->offset; 13226c5a7ce4SBhanu Prakash Gollapudi enum fc_rctl r_ctl = cb_arg->r_ctl; 13236c5a7ce4SBhanu Prakash Gollapudi int rc = 0; 13246c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = orig_io_req->tgt; 13256c5a7ce4SBhanu Prakash Gollapudi 13266c5a7ce4SBhanu Prakash Gollapudi BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x" 13276c5a7ce4SBhanu Prakash Gollapudi "cmd_type = %d\n", 13286c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->xid, seq_clnp_req->cmd_type); 13296c5a7ce4SBhanu Prakash Gollapudi 13306c5a7ce4SBhanu Prakash Gollapudi if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) { 13316c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n", 13326c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->xid); 13336c5a7ce4SBhanu Prakash Gollapudi goto free_cb_arg; 13346c5a7ce4SBhanu Prakash Gollapudi } 13356c5a7ce4SBhanu Prakash Gollapudi 13366c5a7ce4SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 13376c5a7ce4SBhanu Prakash Gollapudi rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); 13386c5a7ce4SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 13396c5a7ce4SBhanu Prakash Gollapudi 13406c5a7ce4SBhanu Prakash Gollapudi if (rc) 13416c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "clnup_compl: Unable to send SRR" 13426c5a7ce4SBhanu Prakash Gollapudi " IO will abort\n"); 13436c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->cb_arg = NULL; 13446c5a7ce4SBhanu Prakash Gollapudi kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); 13456c5a7ce4SBhanu Prakash Gollapudi free_cb_arg: 13466c5a7ce4SBhanu Prakash Gollapudi kfree(cb_arg); 13476c5a7ce4SBhanu Prakash Gollapudi return; 13486c5a7ce4SBhanu Prakash Gollapudi } 13496c5a7ce4SBhanu Prakash Gollapudi 1350853e2bd2SBhanu Gollapudi void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, 1351853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, 1352853e2bd2SBhanu Gollapudi u8 num_rq) 1353853e2bd2SBhanu Gollapudi { 1354853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " 1355853e2bd2SBhanu Gollapudi "refcnt = %d, cmd_type = %d\n", 1356853e2bd2SBhanu Gollapudi io_req->refcount.refcount.counter, io_req->cmd_type); 1357853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ERROR); 1358853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 135999cc600cSBhanu Prakash Gollapudi if (io_req->wait_for_comp) 136099cc600cSBhanu Prakash Gollapudi complete(&io_req->tm_done); 1361853e2bd2SBhanu Gollapudi } 1362853e2bd2SBhanu Gollapudi 1363853e2bd2SBhanu Gollapudi void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, 1364853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, 1365853e2bd2SBhanu Gollapudi u8 num_rq) 1366853e2bd2SBhanu Gollapudi { 1367853e2bd2SBhanu Gollapudi u32 r_ctl; 1368853e2bd2SBhanu Gollapudi u32 r_a_tov = FC_DEF_R_A_TOV; 1369853e2bd2SBhanu Gollapudi u8 issue_rrq = 0; 1370853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1371853e2bd2SBhanu Gollapudi 1372853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" 1373853e2bd2SBhanu Gollapudi "refcnt = %d, cmd_type = %d\n", 1374853e2bd2SBhanu Gollapudi io_req->xid, 1375853e2bd2SBhanu Gollapudi io_req->refcount.refcount.counter, io_req->cmd_type); 1376853e2bd2SBhanu Gollapudi 1377853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1378853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 1379853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Timer context finished processing" 1380853e2bd2SBhanu Gollapudi " this io\n"); 1381853e2bd2SBhanu Gollapudi return; 1382853e2bd2SBhanu Gollapudi } 1383853e2bd2SBhanu Gollapudi 1384853e2bd2SBhanu Gollapudi /* Do not issue RRQ as this IO is already cleanedup */ 1385853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, 1386853e2bd2SBhanu Gollapudi &io_req->req_flags)) 1387853e2bd2SBhanu Gollapudi goto io_compl; 1388853e2bd2SBhanu Gollapudi 1389853e2bd2SBhanu Gollapudi /* 1390853e2bd2SBhanu Gollapudi * For ABTS issued due to SCSI eh_abort_handler, timeout 1391853e2bd2SBhanu Gollapudi * values are maintained by scsi-ml itself. Cancel timeout 1392853e2bd2SBhanu Gollapudi * in case ABTS issued as part of task management function 1393853e2bd2SBhanu Gollapudi * or due to FW error. 1394853e2bd2SBhanu Gollapudi */ 1395853e2bd2SBhanu Gollapudi if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) 1396853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1397853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1398853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1399853e2bd2SBhanu Gollapudi 1400619c5cb6SVlad Zolotarov r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl; 1401853e2bd2SBhanu Gollapudi 1402853e2bd2SBhanu Gollapudi switch (r_ctl) { 1403853e2bd2SBhanu Gollapudi case FC_RCTL_BA_ACC: 1404853e2bd2SBhanu Gollapudi /* 1405853e2bd2SBhanu Gollapudi * Dont release this cmd yet. It will be relesed 1406853e2bd2SBhanu Gollapudi * after we get RRQ response 1407853e2bd2SBhanu Gollapudi */ 1408853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); 1409853e2bd2SBhanu Gollapudi issue_rrq = 1; 1410853e2bd2SBhanu Gollapudi break; 1411853e2bd2SBhanu Gollapudi 1412853e2bd2SBhanu Gollapudi case FC_RCTL_BA_RJT: 1413853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); 1414853e2bd2SBhanu Gollapudi break; 1415853e2bd2SBhanu Gollapudi default: 1416853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Unknown ABTS response\n"); 1417853e2bd2SBhanu Gollapudi break; 1418853e2bd2SBhanu Gollapudi } 1419853e2bd2SBhanu Gollapudi 1420853e2bd2SBhanu Gollapudi if (issue_rrq) { 1421853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); 1422853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); 1423853e2bd2SBhanu Gollapudi } 1424853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 1425853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, r_a_tov); 1426853e2bd2SBhanu Gollapudi 1427853e2bd2SBhanu Gollapudi io_compl: 1428853e2bd2SBhanu Gollapudi if (io_req->wait_for_comp) { 1429853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1430853e2bd2SBhanu Gollapudi &io_req->req_flags)) 1431853e2bd2SBhanu Gollapudi complete(&io_req->tm_done); 1432853e2bd2SBhanu Gollapudi } else { 1433853e2bd2SBhanu Gollapudi /* 1434853e2bd2SBhanu Gollapudi * We end up here when ABTS is issued as 1435853e2bd2SBhanu Gollapudi * in asynchronous context, i.e., as part 1436853e2bd2SBhanu Gollapudi * of task management completion, or 1437853e2bd2SBhanu Gollapudi * when FW error is received or when the 1438853e2bd2SBhanu Gollapudi * ABTS is issued when the IO is timed 1439853e2bd2SBhanu Gollapudi * out. 1440853e2bd2SBhanu Gollapudi */ 1441853e2bd2SBhanu Gollapudi 1442853e2bd2SBhanu Gollapudi if (io_req->on_active_queue) { 1443853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1444853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0; 1445853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */ 1446853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue); 1447853e2bd2SBhanu Gollapudi } 1448853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ERROR); 1449853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1450853e2bd2SBhanu Gollapudi } 1451853e2bd2SBhanu Gollapudi } 1452853e2bd2SBhanu Gollapudi 1453853e2bd2SBhanu Gollapudi static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) 1454853e2bd2SBhanu Gollapudi { 1455853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1456853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1457d71fb3bdSBhanu Prakash Gollapudi struct bnx2fc_cmd *cmd, *tmp; 14589cb78c16SHannes Reinecke u64 tm_lun = sc_cmd->device->lun; 14599cb78c16SHannes Reinecke u64 lun; 1460853e2bd2SBhanu Gollapudi int rc = 0; 1461853e2bd2SBhanu Gollapudi 1462853e2bd2SBhanu Gollapudi /* called with tgt_lock held */ 1463853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n"); 1464853e2bd2SBhanu Gollapudi /* 1465853e2bd2SBhanu Gollapudi * Walk thru the active_ios queue and ABORT the IO 1466853e2bd2SBhanu Gollapudi * that matches with the LUN that was reset 1467853e2bd2SBhanu Gollapudi */ 1468d71fb3bdSBhanu Prakash Gollapudi list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { 1469853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n"); 1470853e2bd2SBhanu Gollapudi lun = cmd->sc_cmd->device->lun; 1471853e2bd2SBhanu Gollapudi if (lun == tm_lun) { 1472853e2bd2SBhanu Gollapudi /* Initiate ABTS on this cmd */ 1473853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1474853e2bd2SBhanu Gollapudi &cmd->req_flags)) { 1475853e2bd2SBhanu Gollapudi /* cancel the IO timeout */ 1476853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1477853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1478853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); 1479853e2bd2SBhanu Gollapudi /* timer hold */ 1480853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(cmd); 148125985edcSLucas De Marchi /* abts shouldn't fail in this context */ 1482853e2bd2SBhanu Gollapudi WARN_ON(rc != SUCCESS); 1483853e2bd2SBhanu Gollapudi } else 1484853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "lun_rst: abts already in" 1485853e2bd2SBhanu Gollapudi " progress for this IO 0x%x\n", 1486853e2bd2SBhanu Gollapudi cmd->xid); 1487853e2bd2SBhanu Gollapudi } 1488853e2bd2SBhanu Gollapudi } 1489853e2bd2SBhanu Gollapudi } 1490853e2bd2SBhanu Gollapudi 1491853e2bd2SBhanu Gollapudi static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) 1492853e2bd2SBhanu Gollapudi { 1493853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1494d71fb3bdSBhanu Prakash Gollapudi struct bnx2fc_cmd *cmd, *tmp; 1495853e2bd2SBhanu Gollapudi int rc = 0; 1496853e2bd2SBhanu Gollapudi 1497853e2bd2SBhanu Gollapudi /* called with tgt_lock held */ 1498853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); 1499853e2bd2SBhanu Gollapudi /* 1500853e2bd2SBhanu Gollapudi * Walk thru the active_ios queue and ABORT the IO 1501853e2bd2SBhanu Gollapudi * that matches with the LUN that was reset 1502853e2bd2SBhanu Gollapudi */ 1503d71fb3bdSBhanu Prakash Gollapudi list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { 1504853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); 1505853e2bd2SBhanu Gollapudi /* Initiate ABTS */ 1506853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1507853e2bd2SBhanu Gollapudi &cmd->req_flags)) { 1508853e2bd2SBhanu Gollapudi /* cancel the IO timeout */ 1509853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1510853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1511853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* timer hold */ 1512853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(cmd); 151325985edcSLucas De Marchi /* abts shouldn't fail in this context */ 1514853e2bd2SBhanu Gollapudi WARN_ON(rc != SUCCESS); 1515853e2bd2SBhanu Gollapudi 1516853e2bd2SBhanu Gollapudi } else 1517853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tgt_rst: abts already in progress" 1518853e2bd2SBhanu Gollapudi " for this IO 0x%x\n", cmd->xid); 1519853e2bd2SBhanu Gollapudi } 1520853e2bd2SBhanu Gollapudi } 1521853e2bd2SBhanu Gollapudi 1522853e2bd2SBhanu Gollapudi void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, 1523853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, u8 num_rq) 1524853e2bd2SBhanu Gollapudi { 1525853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *tm_req; 1526853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr; 1527853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1528853e2bd2SBhanu Gollapudi u64 *hdr; 1529853e2bd2SBhanu Gollapudi u64 *temp_hdr; 1530853e2bd2SBhanu Gollapudi void *rsp_buf; 1531853e2bd2SBhanu Gollapudi 1532853e2bd2SBhanu Gollapudi /* Called with tgt_lock held */ 1533853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); 1534853e2bd2SBhanu Gollapudi 1535853e2bd2SBhanu Gollapudi if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) 1536853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); 1537853e2bd2SBhanu Gollapudi else { 1538853e2bd2SBhanu Gollapudi /* TM has already timed out and we got 1539853e2bd2SBhanu Gollapudi * delayed completion. Ignore completion 1540853e2bd2SBhanu Gollapudi * processing. 1541853e2bd2SBhanu Gollapudi */ 1542853e2bd2SBhanu Gollapudi return; 1543853e2bd2SBhanu Gollapudi } 1544853e2bd2SBhanu Gollapudi 1545853e2bd2SBhanu Gollapudi tm_req = &(io_req->mp_req); 1546853e2bd2SBhanu Gollapudi fc_hdr = &(tm_req->resp_fc_hdr); 1547853e2bd2SBhanu Gollapudi hdr = (u64 *)fc_hdr; 1548853e2bd2SBhanu Gollapudi temp_hdr = (u64 *) 1549619c5cb6SVlad Zolotarov &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; 1550853e2bd2SBhanu Gollapudi hdr[0] = cpu_to_be64(temp_hdr[0]); 1551853e2bd2SBhanu Gollapudi hdr[1] = cpu_to_be64(temp_hdr[1]); 1552853e2bd2SBhanu Gollapudi hdr[2] = cpu_to_be64(temp_hdr[2]); 1553853e2bd2SBhanu Gollapudi 1554619c5cb6SVlad Zolotarov tm_req->resp_len = 1555619c5cb6SVlad Zolotarov task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; 1556853e2bd2SBhanu Gollapudi 1557853e2bd2SBhanu Gollapudi rsp_buf = tm_req->resp_buf; 1558853e2bd2SBhanu Gollapudi 1559853e2bd2SBhanu Gollapudi if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { 1560853e2bd2SBhanu Gollapudi bnx2fc_parse_fcp_rsp(io_req, 1561853e2bd2SBhanu Gollapudi (struct fcoe_fcp_rsp_payload *) 1562853e2bd2SBhanu Gollapudi rsp_buf, num_rq); 1563853e2bd2SBhanu Gollapudi if (io_req->fcp_rsp_code == 0) { 1564853e2bd2SBhanu Gollapudi /* TM successful */ 1565853e2bd2SBhanu Gollapudi if (tm_req->tm_flags & FCP_TMF_LUN_RESET) 1566853e2bd2SBhanu Gollapudi bnx2fc_lun_reset_cmpl(io_req); 1567853e2bd2SBhanu Gollapudi else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) 1568853e2bd2SBhanu Gollapudi bnx2fc_tgt_reset_cmpl(io_req); 1569853e2bd2SBhanu Gollapudi } 1570853e2bd2SBhanu Gollapudi } else { 1571853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", 1572853e2bd2SBhanu Gollapudi fc_hdr->fh_r_ctl); 1573853e2bd2SBhanu Gollapudi } 1574853e2bd2SBhanu Gollapudi if (!sc_cmd->SCp.ptr) { 1575b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n"); 1576853e2bd2SBhanu Gollapudi return; 1577853e2bd2SBhanu Gollapudi } 1578853e2bd2SBhanu Gollapudi switch (io_req->fcp_status) { 1579853e2bd2SBhanu Gollapudi case FC_GOOD: 1580853e2bd2SBhanu Gollapudi if (io_req->cdb_status == 0) { 1581853e2bd2SBhanu Gollapudi /* Good IO completion */ 1582853e2bd2SBhanu Gollapudi sc_cmd->result = DID_OK << 16; 1583853e2bd2SBhanu Gollapudi } else { 1584853e2bd2SBhanu Gollapudi /* Transport status is good, SCSI status not good */ 1585853e2bd2SBhanu Gollapudi sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1586853e2bd2SBhanu Gollapudi } 1587853e2bd2SBhanu Gollapudi if (io_req->fcp_resid) 1588853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, io_req->fcp_resid); 1589853e2bd2SBhanu Gollapudi break; 1590853e2bd2SBhanu Gollapudi 1591853e2bd2SBhanu Gollapudi default: 1592853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", 1593853e2bd2SBhanu Gollapudi io_req->fcp_status); 1594853e2bd2SBhanu Gollapudi break; 1595853e2bd2SBhanu Gollapudi } 1596853e2bd2SBhanu Gollapudi 1597853e2bd2SBhanu Gollapudi sc_cmd = io_req->sc_cmd; 1598853e2bd2SBhanu Gollapudi io_req->sc_cmd = NULL; 1599853e2bd2SBhanu Gollapudi 1600853e2bd2SBhanu Gollapudi /* check if the io_req exists in tgt's tmf_q */ 1601853e2bd2SBhanu Gollapudi if (io_req->on_tmf_queue) { 1602853e2bd2SBhanu Gollapudi 1603853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1604853e2bd2SBhanu Gollapudi io_req->on_tmf_queue = 0; 1605853e2bd2SBhanu Gollapudi } else { 1606853e2bd2SBhanu Gollapudi 1607b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "Command not on active_cmd_queue!\n"); 1608853e2bd2SBhanu Gollapudi return; 1609853e2bd2SBhanu Gollapudi } 1610853e2bd2SBhanu Gollapudi 1611853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = NULL; 1612853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 1613853e2bd2SBhanu Gollapudi 1614853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1615853e2bd2SBhanu Gollapudi if (io_req->wait_for_comp) { 1616853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); 1617853e2bd2SBhanu Gollapudi complete(&io_req->tm_done); 1618853e2bd2SBhanu Gollapudi } 1619853e2bd2SBhanu Gollapudi } 1620853e2bd2SBhanu Gollapudi 1621853e2bd2SBhanu Gollapudi static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 1622853e2bd2SBhanu Gollapudi int bd_index) 1623853e2bd2SBhanu Gollapudi { 1624853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1625853e2bd2SBhanu Gollapudi int frag_size, sg_frags; 1626853e2bd2SBhanu Gollapudi 1627853e2bd2SBhanu Gollapudi sg_frags = 0; 1628853e2bd2SBhanu Gollapudi while (sg_len) { 1629853e2bd2SBhanu Gollapudi if (sg_len >= BNX2FC_BD_SPLIT_SZ) 1630853e2bd2SBhanu Gollapudi frag_size = BNX2FC_BD_SPLIT_SZ; 1631853e2bd2SBhanu Gollapudi else 1632853e2bd2SBhanu Gollapudi frag_size = sg_len; 1633853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; 1634853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; 1635853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_len = (u16)frag_size; 1636853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].flags = 0; 1637853e2bd2SBhanu Gollapudi 1638853e2bd2SBhanu Gollapudi addr += (u64) frag_size; 1639853e2bd2SBhanu Gollapudi sg_frags++; 1640853e2bd2SBhanu Gollapudi sg_len -= frag_size; 1641853e2bd2SBhanu Gollapudi } 1642853e2bd2SBhanu Gollapudi return sg_frags; 1643853e2bd2SBhanu Gollapudi 1644853e2bd2SBhanu Gollapudi } 1645853e2bd2SBhanu Gollapudi 1646853e2bd2SBhanu Gollapudi static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) 1647853e2bd2SBhanu Gollapudi { 16483ce41ea1SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 16493ce41ea1SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 1650853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd; 1651853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1652853e2bd2SBhanu Gollapudi struct scatterlist *sg; 1653853e2bd2SBhanu Gollapudi int byte_count = 0; 1654853e2bd2SBhanu Gollapudi int sg_count = 0; 1655853e2bd2SBhanu Gollapudi int bd_count = 0; 1656853e2bd2SBhanu Gollapudi int sg_frags; 1657853e2bd2SBhanu Gollapudi unsigned int sg_len; 1658853e2bd2SBhanu Gollapudi u64 addr; 1659853e2bd2SBhanu Gollapudi int i; 1660853e2bd2SBhanu Gollapudi 16615565461eSChad Dupuis /* 16625565461eSChad Dupuis * Use dma_map_sg directly to ensure we're using the correct 16635565461eSChad Dupuis * dev struct off of pcidev. 16645565461eSChad Dupuis */ 16653ce41ea1SBhanu Prakash Gollapudi sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc), 16663ce41ea1SBhanu Prakash Gollapudi scsi_sg_count(sc), sc->sc_data_direction); 1667853e2bd2SBhanu Gollapudi scsi_for_each_sg(sc, sg, sg_count, i) { 1668853e2bd2SBhanu Gollapudi sg_len = sg_dma_len(sg); 1669853e2bd2SBhanu Gollapudi addr = sg_dma_address(sg); 1670853e2bd2SBhanu Gollapudi if (sg_len > BNX2FC_MAX_BD_LEN) { 1671853e2bd2SBhanu Gollapudi sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, 1672853e2bd2SBhanu Gollapudi bd_count); 1673853e2bd2SBhanu Gollapudi } else { 1674853e2bd2SBhanu Gollapudi 1675853e2bd2SBhanu Gollapudi sg_frags = 1; 1676853e2bd2SBhanu Gollapudi bd[bd_count].buf_addr_lo = addr & 0xffffffff; 1677853e2bd2SBhanu Gollapudi bd[bd_count].buf_addr_hi = addr >> 32; 1678853e2bd2SBhanu Gollapudi bd[bd_count].buf_len = (u16)sg_len; 1679853e2bd2SBhanu Gollapudi bd[bd_count].flags = 0; 1680853e2bd2SBhanu Gollapudi } 1681853e2bd2SBhanu Gollapudi bd_count += sg_frags; 1682853e2bd2SBhanu Gollapudi byte_count += sg_len; 1683853e2bd2SBhanu Gollapudi } 1684853e2bd2SBhanu Gollapudi if (byte_count != scsi_bufflen(sc)) 1685853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " 1686853e2bd2SBhanu Gollapudi "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), 1687853e2bd2SBhanu Gollapudi io_req->xid); 1688853e2bd2SBhanu Gollapudi return bd_count; 1689853e2bd2SBhanu Gollapudi } 1690853e2bd2SBhanu Gollapudi 1691822f2903SBhanu Prakash Gollapudi static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) 1692853e2bd2SBhanu Gollapudi { 1693853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd; 1694853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1695853e2bd2SBhanu Gollapudi int bd_count; 1696853e2bd2SBhanu Gollapudi 1697822f2903SBhanu Prakash Gollapudi if (scsi_sg_count(sc)) { 1698853e2bd2SBhanu Gollapudi bd_count = bnx2fc_map_sg(io_req); 1699822f2903SBhanu Prakash Gollapudi if (bd_count == 0) 1700822f2903SBhanu Prakash Gollapudi return -ENOMEM; 1701822f2903SBhanu Prakash Gollapudi } else { 1702853e2bd2SBhanu Gollapudi bd_count = 0; 1703853e2bd2SBhanu Gollapudi bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; 1704853e2bd2SBhanu Gollapudi bd[0].buf_len = bd[0].flags = 0; 1705853e2bd2SBhanu Gollapudi } 1706853e2bd2SBhanu Gollapudi io_req->bd_tbl->bd_valid = bd_count; 1707822f2903SBhanu Prakash Gollapudi 1708822f2903SBhanu Prakash Gollapudi return 0; 1709853e2bd2SBhanu Gollapudi } 1710853e2bd2SBhanu Gollapudi 1711853e2bd2SBhanu Gollapudi static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) 1712853e2bd2SBhanu Gollapudi { 1713853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd; 17145565461eSChad Dupuis struct bnx2fc_interface *interface = io_req->port->priv; 17155565461eSChad Dupuis struct bnx2fc_hba *hba = interface->hba; 1716853e2bd2SBhanu Gollapudi 17175565461eSChad Dupuis /* 17185565461eSChad Dupuis * Use dma_unmap_sg directly to ensure we're using the correct 17195565461eSChad Dupuis * dev struct off of pcidev. 17205565461eSChad Dupuis */ 17215565461eSChad Dupuis if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { 17225565461eSChad Dupuis dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc), 17235565461eSChad Dupuis scsi_sg_count(sc), sc->sc_data_direction); 1724853e2bd2SBhanu Gollapudi io_req->bd_tbl->bd_valid = 0; 1725853e2bd2SBhanu Gollapudi } 1726853e2bd2SBhanu Gollapudi } 1727853e2bd2SBhanu Gollapudi 1728853e2bd2SBhanu Gollapudi void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, 1729853e2bd2SBhanu Gollapudi struct fcp_cmnd *fcp_cmnd) 1730853e2bd2SBhanu Gollapudi { 1731853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1732853e2bd2SBhanu Gollapudi 1733853e2bd2SBhanu Gollapudi memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 1734853e2bd2SBhanu Gollapudi 1735e35fa8c2SAndy Grover int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun); 1736853e2bd2SBhanu Gollapudi 1737853e2bd2SBhanu Gollapudi fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); 1738853e2bd2SBhanu Gollapudi memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); 1739853e2bd2SBhanu Gollapudi 1740853e2bd2SBhanu Gollapudi fcp_cmnd->fc_cmdref = 0; 1741853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = 0; 1742853e2bd2SBhanu Gollapudi fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; 1743853e2bd2SBhanu Gollapudi fcp_cmnd->fc_flags = io_req->io_req_flags; 1744853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; 1745853e2bd2SBhanu Gollapudi } 1746853e2bd2SBhanu Gollapudi 1747853e2bd2SBhanu Gollapudi static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, 1748853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp, 1749853e2bd2SBhanu Gollapudi u8 num_rq) 1750853e2bd2SBhanu Gollapudi { 1751853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1752853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1753853e2bd2SBhanu Gollapudi u8 rsp_flags = fcp_rsp->fcp_flags.flags; 1754853e2bd2SBhanu Gollapudi u32 rq_buff_len = 0; 1755853e2bd2SBhanu Gollapudi int i; 1756853e2bd2SBhanu Gollapudi unsigned char *rq_data; 1757853e2bd2SBhanu Gollapudi unsigned char *dummy; 1758853e2bd2SBhanu Gollapudi int fcp_sns_len = 0; 1759853e2bd2SBhanu Gollapudi int fcp_rsp_len = 0; 1760853e2bd2SBhanu Gollapudi 1761853e2bd2SBhanu Gollapudi io_req->fcp_status = FC_GOOD; 1762adcf7dfbSChad Dupuis io_req->fcp_resid = 0; 1763adcf7dfbSChad Dupuis if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | 1764adcf7dfbSChad Dupuis FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) 1765853e2bd2SBhanu Gollapudi io_req->fcp_resid = fcp_rsp->fcp_resid; 1766853e2bd2SBhanu Gollapudi 1767853e2bd2SBhanu Gollapudi io_req->scsi_comp_flags = rsp_flags; 1768853e2bd2SBhanu Gollapudi CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = 1769853e2bd2SBhanu Gollapudi fcp_rsp->scsi_status_code; 1770853e2bd2SBhanu Gollapudi 1771853e2bd2SBhanu Gollapudi /* Fetch fcp_rsp_info and fcp_sns_info if available */ 1772853e2bd2SBhanu Gollapudi if (num_rq) { 1773853e2bd2SBhanu Gollapudi 1774853e2bd2SBhanu Gollapudi /* 1775853e2bd2SBhanu Gollapudi * We do not anticipate num_rq >1, as the linux defined 1776853e2bd2SBhanu Gollapudi * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO 1777853e2bd2SBhanu Gollapudi * 256 bytes of single rq buffer is good enough to hold this. 1778853e2bd2SBhanu Gollapudi */ 1779853e2bd2SBhanu Gollapudi 1780853e2bd2SBhanu Gollapudi if (rsp_flags & 1781853e2bd2SBhanu Gollapudi FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { 1782853e2bd2SBhanu Gollapudi fcp_rsp_len = rq_buff_len 1783853e2bd2SBhanu Gollapudi = fcp_rsp->fcp_rsp_len; 1784853e2bd2SBhanu Gollapudi } 1785853e2bd2SBhanu Gollapudi 1786853e2bd2SBhanu Gollapudi if (rsp_flags & 1787853e2bd2SBhanu Gollapudi FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { 1788853e2bd2SBhanu Gollapudi fcp_sns_len = fcp_rsp->fcp_sns_len; 1789853e2bd2SBhanu Gollapudi rq_buff_len += fcp_rsp->fcp_sns_len; 1790853e2bd2SBhanu Gollapudi } 1791853e2bd2SBhanu Gollapudi 1792853e2bd2SBhanu Gollapudi io_req->fcp_rsp_len = fcp_rsp_len; 1793853e2bd2SBhanu Gollapudi io_req->fcp_sns_len = fcp_sns_len; 1794853e2bd2SBhanu Gollapudi 1795853e2bd2SBhanu Gollapudi if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { 1796853e2bd2SBhanu Gollapudi /* Invalid sense sense length. */ 1797b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "invalid sns length %d\n", 1798853e2bd2SBhanu Gollapudi rq_buff_len); 1799853e2bd2SBhanu Gollapudi /* reset rq_buff_len */ 1800853e2bd2SBhanu Gollapudi rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; 1801853e2bd2SBhanu Gollapudi } 1802853e2bd2SBhanu Gollapudi 1803853e2bd2SBhanu Gollapudi rq_data = bnx2fc_get_next_rqe(tgt, 1); 1804853e2bd2SBhanu Gollapudi 1805853e2bd2SBhanu Gollapudi if (num_rq > 1) { 1806853e2bd2SBhanu Gollapudi /* We do not need extra sense data */ 1807853e2bd2SBhanu Gollapudi for (i = 1; i < num_rq; i++) 1808853e2bd2SBhanu Gollapudi dummy = bnx2fc_get_next_rqe(tgt, 1); 1809853e2bd2SBhanu Gollapudi } 1810853e2bd2SBhanu Gollapudi 1811853e2bd2SBhanu Gollapudi /* fetch fcp_rsp_code */ 1812853e2bd2SBhanu Gollapudi if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1813853e2bd2SBhanu Gollapudi /* Only for task management function */ 1814853e2bd2SBhanu Gollapudi io_req->fcp_rsp_code = rq_data[3]; 1815853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "fcp_rsp_code = %d\n", 1816853e2bd2SBhanu Gollapudi io_req->fcp_rsp_code); 1817853e2bd2SBhanu Gollapudi } 1818853e2bd2SBhanu Gollapudi 1819853e2bd2SBhanu Gollapudi /* fetch sense data */ 1820853e2bd2SBhanu Gollapudi rq_data += fcp_rsp_len; 1821853e2bd2SBhanu Gollapudi 1822853e2bd2SBhanu Gollapudi if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1823853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Truncating sense buffer\n"); 1824853e2bd2SBhanu Gollapudi fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1825853e2bd2SBhanu Gollapudi } 1826853e2bd2SBhanu Gollapudi 182716da05b1SAndi Kleen memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1828853e2bd2SBhanu Gollapudi if (fcp_sns_len) 1829853e2bd2SBhanu Gollapudi memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); 1830853e2bd2SBhanu Gollapudi 1831853e2bd2SBhanu Gollapudi /* return RQ entries */ 1832853e2bd2SBhanu Gollapudi for (i = 0; i < num_rq; i++) 1833853e2bd2SBhanu Gollapudi bnx2fc_return_rqe(tgt, 1); 1834853e2bd2SBhanu Gollapudi } 1835853e2bd2SBhanu Gollapudi } 1836853e2bd2SBhanu Gollapudi 1837853e2bd2SBhanu Gollapudi /** 1838853e2bd2SBhanu Gollapudi * bnx2fc_queuecommand - Queuecommand function of the scsi template 1839853e2bd2SBhanu Gollapudi * 1840853e2bd2SBhanu Gollapudi * @host: The Scsi_Host the command was issued to 1841853e2bd2SBhanu Gollapudi * @sc_cmd: struct scsi_cmnd to be executed 1842853e2bd2SBhanu Gollapudi * 1843853e2bd2SBhanu Gollapudi * This is the IO strategy routine, called by SCSI-ML 1844853e2bd2SBhanu Gollapudi **/ 1845853e2bd2SBhanu Gollapudi int bnx2fc_queuecommand(struct Scsi_Host *host, 1846853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd) 1847853e2bd2SBhanu Gollapudi { 1848853e2bd2SBhanu Gollapudi struct fc_lport *lport = shost_priv(host); 1849853e2bd2SBhanu Gollapudi struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1850853e2bd2SBhanu Gollapudi struct fc_rport_libfc_priv *rp = rport->dd_data; 1851853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt; 1852853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 1853853e2bd2SBhanu Gollapudi int rc = 0; 1854853e2bd2SBhanu Gollapudi int rval; 1855853e2bd2SBhanu Gollapudi 1856853e2bd2SBhanu Gollapudi rval = fc_remote_port_chkready(rport); 1857853e2bd2SBhanu Gollapudi if (rval) { 1858853e2bd2SBhanu Gollapudi sc_cmd->result = rval; 1859853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 1860853e2bd2SBhanu Gollapudi return 0; 1861853e2bd2SBhanu Gollapudi } 1862853e2bd2SBhanu Gollapudi 1863853e2bd2SBhanu Gollapudi if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1864853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY; 1865853e2bd2SBhanu Gollapudi goto exit_qcmd; 1866853e2bd2SBhanu Gollapudi } 1867853e2bd2SBhanu Gollapudi 1868853e2bd2SBhanu Gollapudi /* rport and tgt are allocated together, so tgt should be non-NULL */ 1869853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1]; 1870853e2bd2SBhanu Gollapudi 1871853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 1872853e2bd2SBhanu Gollapudi /* 1873853e2bd2SBhanu Gollapudi * Session is not offloaded yet. Let SCSI-ml retry 1874853e2bd2SBhanu Gollapudi * the command. 1875853e2bd2SBhanu Gollapudi */ 1876853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_TARGET_BUSY; 1877853e2bd2SBhanu Gollapudi goto exit_qcmd; 1878853e2bd2SBhanu Gollapudi } 1879245a5754SEddie Wai if (tgt->retry_delay_timestamp) { 1880245a5754SEddie Wai if (time_after(jiffies, tgt->retry_delay_timestamp)) { 1881245a5754SEddie Wai tgt->retry_delay_timestamp = 0; 1882245a5754SEddie Wai } else { 1883245a5754SEddie Wai /* If retry_delay timer is active, flow off the ML */ 1884245a5754SEddie Wai rc = SCSI_MLQUEUE_TARGET_BUSY; 1885245a5754SEddie Wai goto exit_qcmd; 1886245a5754SEddie Wai } 1887245a5754SEddie Wai } 1888dc6311ddSMaurizio Lombardi 1889dc6311ddSMaurizio Lombardi spin_lock_bh(&tgt->tgt_lock); 1890dc6311ddSMaurizio Lombardi 1891853e2bd2SBhanu Gollapudi io_req = bnx2fc_cmd_alloc(tgt); 1892853e2bd2SBhanu Gollapudi if (!io_req) { 1893853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY; 1894dc6311ddSMaurizio Lombardi goto exit_qcmd_tgtlock; 1895853e2bd2SBhanu Gollapudi } 1896853e2bd2SBhanu Gollapudi io_req->sc_cmd = sc_cmd; 1897853e2bd2SBhanu Gollapudi 1898853e2bd2SBhanu Gollapudi if (bnx2fc_post_io_req(tgt, io_req)) { 1899853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Unable to post io_req\n"); 1900853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY; 1901dc6311ddSMaurizio Lombardi goto exit_qcmd_tgtlock; 1902853e2bd2SBhanu Gollapudi } 1903dc6311ddSMaurizio Lombardi 1904dc6311ddSMaurizio Lombardi exit_qcmd_tgtlock: 1905dc6311ddSMaurizio Lombardi spin_unlock_bh(&tgt->tgt_lock); 1906853e2bd2SBhanu Gollapudi exit_qcmd: 1907853e2bd2SBhanu Gollapudi return rc; 1908853e2bd2SBhanu Gollapudi } 1909853e2bd2SBhanu Gollapudi 1910853e2bd2SBhanu Gollapudi void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, 1911853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, 1912853e2bd2SBhanu Gollapudi u8 num_rq) 1913853e2bd2SBhanu Gollapudi { 1914853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp; 1915853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1916853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd; 1917853e2bd2SBhanu Gollapudi struct Scsi_Host *host; 1918853e2bd2SBhanu Gollapudi 1919853e2bd2SBhanu Gollapudi 1920853e2bd2SBhanu Gollapudi /* scsi_cmd_cmpl is called with tgt lock held */ 1921853e2bd2SBhanu Gollapudi 1922853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 1923853e2bd2SBhanu Gollapudi /* we will not receive ABTS response for this IO */ 1924853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Timer context finished processing " 1925853e2bd2SBhanu Gollapudi "this scsi cmd\n"); 1926853e2bd2SBhanu Gollapudi } 1927853e2bd2SBhanu Gollapudi 1928853e2bd2SBhanu Gollapudi /* Cancel the timeout_work, as we received IO completion */ 1929853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1930853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1931853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1932853e2bd2SBhanu Gollapudi 1933853e2bd2SBhanu Gollapudi sc_cmd = io_req->sc_cmd; 1934853e2bd2SBhanu Gollapudi if (sc_cmd == NULL) { 1935853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n"); 1936853e2bd2SBhanu Gollapudi return; 1937853e2bd2SBhanu Gollapudi } 1938853e2bd2SBhanu Gollapudi 1939853e2bd2SBhanu Gollapudi /* Fetch fcp_rsp from task context and perform cmd completion */ 1940853e2bd2SBhanu Gollapudi fcp_rsp = (struct fcoe_fcp_rsp_payload *) 1941619c5cb6SVlad Zolotarov &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload); 1942853e2bd2SBhanu Gollapudi 1943853e2bd2SBhanu Gollapudi /* parse fcp_rsp and obtain sense data from RQ if available */ 1944853e2bd2SBhanu Gollapudi bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq); 1945853e2bd2SBhanu Gollapudi 1946853e2bd2SBhanu Gollapudi host = sc_cmd->device->host; 1947853e2bd2SBhanu Gollapudi if (!sc_cmd->SCp.ptr) { 1948853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "SCp.ptr is NULL\n"); 1949853e2bd2SBhanu Gollapudi return; 1950853e2bd2SBhanu Gollapudi } 1951853e2bd2SBhanu Gollapudi 1952853e2bd2SBhanu Gollapudi if (io_req->on_active_queue) { 1953853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1954853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0; 1955853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */ 1956853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue); 1957853e2bd2SBhanu Gollapudi } else { 1958853e2bd2SBhanu Gollapudi /* This should not happen, but could have been pulled 1959853e2bd2SBhanu Gollapudi * by bnx2fc_flush_active_ios(), or during a race 1960853e2bd2SBhanu Gollapudi * between command abort and (late) completion. 1961853e2bd2SBhanu Gollapudi */ 1962853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n"); 1963853e2bd2SBhanu Gollapudi if (io_req->wait_for_comp) 1964853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1965853e2bd2SBhanu Gollapudi &io_req->req_flags)) 1966853e2bd2SBhanu Gollapudi complete(&io_req->tm_done); 1967853e2bd2SBhanu Gollapudi } 1968853e2bd2SBhanu Gollapudi 1969853e2bd2SBhanu Gollapudi bnx2fc_unmap_sg_list(io_req); 1970b5a95fe7SBhanu Prakash Gollapudi io_req->sc_cmd = NULL; 1971853e2bd2SBhanu Gollapudi 1972853e2bd2SBhanu Gollapudi switch (io_req->fcp_status) { 1973853e2bd2SBhanu Gollapudi case FC_GOOD: 1974853e2bd2SBhanu Gollapudi if (io_req->cdb_status == 0) { 1975853e2bd2SBhanu Gollapudi /* Good IO completion */ 1976853e2bd2SBhanu Gollapudi sc_cmd->result = DID_OK << 16; 1977853e2bd2SBhanu Gollapudi } else { 1978853e2bd2SBhanu Gollapudi /* Transport status is good, SCSI status not good */ 1979853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d" 1980853e2bd2SBhanu Gollapudi " fcp_resid = 0x%x\n", 1981853e2bd2SBhanu Gollapudi io_req->cdb_status, io_req->fcp_resid); 1982853e2bd2SBhanu Gollapudi sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1983245a5754SEddie Wai 1984245a5754SEddie Wai if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || 1985245a5754SEddie Wai io_req->cdb_status == SAM_STAT_BUSY) { 1986245a5754SEddie Wai /* Set the jiffies + retry_delay_timer * 100ms 1987245a5754SEddie Wai for the rport/tgt */ 1988245a5754SEddie Wai tgt->retry_delay_timestamp = jiffies + 1989245a5754SEddie Wai fcp_rsp->retry_delay_timer * HZ / 10; 1990245a5754SEddie Wai } 1991245a5754SEddie Wai 1992853e2bd2SBhanu Gollapudi } 1993853e2bd2SBhanu Gollapudi if (io_req->fcp_resid) 1994853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, io_req->fcp_resid); 1995853e2bd2SBhanu Gollapudi break; 1996853e2bd2SBhanu Gollapudi default: 1997b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n", 1998853e2bd2SBhanu Gollapudi io_req->fcp_status); 1999853e2bd2SBhanu Gollapudi break; 2000853e2bd2SBhanu Gollapudi } 2001853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = NULL; 2002853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 2003853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2004853e2bd2SBhanu Gollapudi } 2005853e2bd2SBhanu Gollapudi 200674446954SBhanu Prakash Gollapudi int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, 2007853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req) 2008853e2bd2SBhanu Gollapudi { 2009853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 2010853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 2011853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 2012853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port; 2013aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv; 2014aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 2015853e2bd2SBhanu Gollapudi struct fc_lport *lport = port->lport; 20161bd49b48SVasu Dev struct fc_stats *stats; 2017853e2bd2SBhanu Gollapudi int task_idx, index; 2018853e2bd2SBhanu Gollapudi u16 xid; 2019853e2bd2SBhanu Gollapudi 2020dc6311ddSMaurizio Lombardi /* bnx2fc_post_io_req() is called with the tgt_lock held */ 2021dc6311ddSMaurizio Lombardi 2022853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 2023853e2bd2SBhanu Gollapudi io_req->cmd_type = BNX2FC_SCSI_CMD; 2024853e2bd2SBhanu Gollapudi io_req->port = port; 2025853e2bd2SBhanu Gollapudi io_req->tgt = tgt; 2026853e2bd2SBhanu Gollapudi io_req->data_xfer_len = scsi_bufflen(sc_cmd); 2027853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = (char *)io_req; 2028853e2bd2SBhanu Gollapudi 20291bd49b48SVasu Dev stats = per_cpu_ptr(lport->stats, get_cpu()); 2030853e2bd2SBhanu Gollapudi if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { 2031853e2bd2SBhanu Gollapudi io_req->io_req_flags = BNX2FC_READ; 2032853e2bd2SBhanu Gollapudi stats->InputRequests++; 2033853e2bd2SBhanu Gollapudi stats->InputBytes += io_req->data_xfer_len; 2034853e2bd2SBhanu Gollapudi } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 2035853e2bd2SBhanu Gollapudi io_req->io_req_flags = BNX2FC_WRITE; 2036853e2bd2SBhanu Gollapudi stats->OutputRequests++; 2037853e2bd2SBhanu Gollapudi stats->OutputBytes += io_req->data_xfer_len; 2038853e2bd2SBhanu Gollapudi } else { 2039853e2bd2SBhanu Gollapudi io_req->io_req_flags = 0; 2040853e2bd2SBhanu Gollapudi stats->ControlRequests++; 2041853e2bd2SBhanu Gollapudi } 2042853e2bd2SBhanu Gollapudi put_cpu(); 2043853e2bd2SBhanu Gollapudi 2044853e2bd2SBhanu Gollapudi xid = io_req->xid; 2045853e2bd2SBhanu Gollapudi 2046853e2bd2SBhanu Gollapudi /* Build buffer descriptor list for firmware from sg list */ 2047822f2903SBhanu Prakash Gollapudi if (bnx2fc_build_bd_list_from_sg(io_req)) { 2048822f2903SBhanu Prakash Gollapudi printk(KERN_ERR PFX "BD list creation failed\n"); 2049822f2903SBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2050822f2903SBhanu Prakash Gollapudi return -EAGAIN; 2051822f2903SBhanu Prakash Gollapudi } 2052853e2bd2SBhanu Gollapudi 2053853e2bd2SBhanu Gollapudi task_idx = xid / BNX2FC_TASKS_PER_PAGE; 2054853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 2055853e2bd2SBhanu Gollapudi 2056853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 2057853e2bd2SBhanu Gollapudi task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; 2058853e2bd2SBhanu Gollapudi task = &(task_page[index]); 2059853e2bd2SBhanu Gollapudi bnx2fc_init_task(io_req, task); 2060853e2bd2SBhanu Gollapudi 2061853e2bd2SBhanu Gollapudi if (tgt->flush_in_prog) { 2062853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Flush in progress..Host Busy\n"); 2063853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2064853e2bd2SBhanu Gollapudi return -EAGAIN; 2065853e2bd2SBhanu Gollapudi } 2066853e2bd2SBhanu Gollapudi 2067853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 2068853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Session not ready...post_io\n"); 2069853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2070853e2bd2SBhanu Gollapudi return -EAGAIN; 2071853e2bd2SBhanu Gollapudi } 2072853e2bd2SBhanu Gollapudi 2073853e2bd2SBhanu Gollapudi /* Time IO req */ 2074b252f4c7SBhanu Prakash Gollapudi if (tgt->io_timeout) 2075853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); 2076853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 2077853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 2078853e2bd2SBhanu Gollapudi 2079853e2bd2SBhanu Gollapudi /* Enqueue the io_req to active_cmd_queue */ 2080853e2bd2SBhanu Gollapudi 2081853e2bd2SBhanu Gollapudi io_req->on_active_queue = 1; 2082853e2bd2SBhanu Gollapudi /* move io_req from pending_queue to active_queue */ 2083853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->active_cmd_queue); 2084853e2bd2SBhanu Gollapudi 2085853e2bd2SBhanu Gollapudi /* Ring doorbell */ 2086853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 2087853e2bd2SBhanu Gollapudi return 0; 2088853e2bd2SBhanu Gollapudi } 2089