1853e2bd2SBhanu Gollapudi /* bnx2fc_io.c: Broadcom NetXtreme II Linux FCoE offload driver. 2853e2bd2SBhanu Gollapudi * IO manager and SCSI IO processing. 3853e2bd2SBhanu Gollapudi * 49b35baaeSBhanu Prakash Gollapudi * Copyright (c) 2008 - 2011 Broadcom Corporation 5853e2bd2SBhanu Gollapudi * 6853e2bd2SBhanu Gollapudi * This program is free software; you can redistribute it and/or modify 7853e2bd2SBhanu Gollapudi * it under the terms of the GNU General Public License as published by 8853e2bd2SBhanu Gollapudi * the Free Software Foundation. 9853e2bd2SBhanu Gollapudi * 10853e2bd2SBhanu Gollapudi * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com) 11853e2bd2SBhanu Gollapudi */ 12853e2bd2SBhanu Gollapudi 13853e2bd2SBhanu Gollapudi #include "bnx2fc.h" 140ea5c275SBhanu Gollapudi 150ea5c275SBhanu Gollapudi #define RESERVE_FREE_LIST_INDEX num_possible_cpus() 160ea5c275SBhanu Gollapudi 17853e2bd2SBhanu Gollapudi static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 18853e2bd2SBhanu Gollapudi int bd_index); 19853e2bd2SBhanu Gollapudi static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req); 20822f2903SBhanu Prakash Gollapudi static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); 21853e2bd2SBhanu Gollapudi static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); 22853e2bd2SBhanu Gollapudi static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); 23853e2bd2SBhanu Gollapudi static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, 24853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp, 25853e2bd2SBhanu Gollapudi u8 num_rq); 26853e2bd2SBhanu Gollapudi 27853e2bd2SBhanu Gollapudi void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req, 28853e2bd2SBhanu Gollapudi unsigned int timer_msec) 29853e2bd2SBhanu Gollapudi { 30aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 31853e2bd2SBhanu Gollapudi 32aea71a02SBhanu Prakash Gollapudi if (queue_delayed_work(interface->timer_work_queue, 33aea71a02SBhanu Prakash Gollapudi &io_req->timeout_work, 34853e2bd2SBhanu Gollapudi msecs_to_jiffies(timer_msec))) 35853e2bd2SBhanu Gollapudi kref_get(&io_req->refcount); 36853e2bd2SBhanu Gollapudi } 37853e2bd2SBhanu Gollapudi 38853e2bd2SBhanu Gollapudi static void bnx2fc_cmd_timeout(struct work_struct *work) 39853e2bd2SBhanu Gollapudi { 40853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd, 41853e2bd2SBhanu Gollapudi timeout_work.work); 42853e2bd2SBhanu Gollapudi struct fc_lport *lport; 43853e2bd2SBhanu Gollapudi struct fc_rport_priv *rdata; 44853e2bd2SBhanu Gollapudi u8 cmd_type = io_req->cmd_type; 45853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 46853e2bd2SBhanu Gollapudi int logo_issued; 47853e2bd2SBhanu Gollapudi int rc; 48853e2bd2SBhanu Gollapudi 49853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d," 50853e2bd2SBhanu Gollapudi "req_flags = %lx\n", cmd_type, io_req->req_flags); 51853e2bd2SBhanu Gollapudi 52853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 53853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) { 54853e2bd2SBhanu Gollapudi clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 55853e2bd2SBhanu Gollapudi /* 56853e2bd2SBhanu Gollapudi * ideally we should hold the io_req until RRQ complets, 57853e2bd2SBhanu Gollapudi * and release io_req from timeout hold. 58853e2bd2SBhanu Gollapudi */ 59853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 60853e2bd2SBhanu Gollapudi bnx2fc_send_rrq(io_req); 61853e2bd2SBhanu Gollapudi return; 62853e2bd2SBhanu Gollapudi } 63853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) { 64853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n"); 65853e2bd2SBhanu Gollapudi goto done; 66853e2bd2SBhanu Gollapudi } 67853e2bd2SBhanu Gollapudi 68853e2bd2SBhanu Gollapudi switch (cmd_type) { 69853e2bd2SBhanu Gollapudi case BNX2FC_SCSI_CMD: 70853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 71853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 72853e2bd2SBhanu Gollapudi /* Handle eh_abort timeout */ 73853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "eh_abort timed out\n"); 74853e2bd2SBhanu Gollapudi complete(&io_req->tm_done); 75853e2bd2SBhanu Gollapudi } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, 76853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 77853e2bd2SBhanu Gollapudi /* Handle internally generated ABTS timeout */ 78853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n", 79853e2bd2SBhanu Gollapudi io_req->refcount.refcount.counter); 80853e2bd2SBhanu Gollapudi if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 81853e2bd2SBhanu Gollapudi &io_req->req_flags))) { 82853e2bd2SBhanu Gollapudi 83853e2bd2SBhanu Gollapudi lport = io_req->port->lport; 84853e2bd2SBhanu Gollapudi rdata = io_req->tgt->rdata; 85853e2bd2SBhanu Gollapudi logo_issued = test_and_set_bit( 86853e2bd2SBhanu Gollapudi BNX2FC_FLAG_EXPL_LOGO, 87853e2bd2SBhanu Gollapudi &tgt->flags); 88853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 89853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 90853e2bd2SBhanu Gollapudi 91853e2bd2SBhanu Gollapudi /* Explicitly logo the target */ 92853e2bd2SBhanu Gollapudi if (!logo_issued) { 93853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Explicit " 94853e2bd2SBhanu Gollapudi "logo - tgt flags = 0x%lx\n", 95853e2bd2SBhanu Gollapudi tgt->flags); 96853e2bd2SBhanu Gollapudi 97853e2bd2SBhanu Gollapudi mutex_lock(&lport->disc.disc_mutex); 98853e2bd2SBhanu Gollapudi lport->tt.rport_logoff(rdata); 99853e2bd2SBhanu Gollapudi mutex_unlock(&lport->disc.disc_mutex); 100853e2bd2SBhanu Gollapudi } 101853e2bd2SBhanu Gollapudi return; 102853e2bd2SBhanu Gollapudi } 103853e2bd2SBhanu Gollapudi } else { 104853e2bd2SBhanu Gollapudi /* Hanlde IO timeout */ 105853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n"); 106853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, 107853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 108853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO completed before " 109853e2bd2SBhanu Gollapudi " timer expiry\n"); 110853e2bd2SBhanu Gollapudi goto done; 111853e2bd2SBhanu Gollapudi } 112853e2bd2SBhanu Gollapudi 113853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 114853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 115853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(io_req); 116853e2bd2SBhanu Gollapudi if (rc == SUCCESS) 117853e2bd2SBhanu Gollapudi goto done; 118853e2bd2SBhanu Gollapudi /* 119853e2bd2SBhanu Gollapudi * Explicitly logo the target if 120853e2bd2SBhanu Gollapudi * abts initiation fails 121853e2bd2SBhanu Gollapudi */ 122853e2bd2SBhanu Gollapudi lport = io_req->port->lport; 123853e2bd2SBhanu Gollapudi rdata = io_req->tgt->rdata; 124853e2bd2SBhanu Gollapudi logo_issued = test_and_set_bit( 125853e2bd2SBhanu Gollapudi BNX2FC_FLAG_EXPL_LOGO, 126853e2bd2SBhanu Gollapudi &tgt->flags); 127853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 128853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 129853e2bd2SBhanu Gollapudi 130853e2bd2SBhanu Gollapudi if (!logo_issued) { 131853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Explicit " 132853e2bd2SBhanu Gollapudi "logo - tgt flags = 0x%lx\n", 133853e2bd2SBhanu Gollapudi tgt->flags); 134853e2bd2SBhanu Gollapudi 135853e2bd2SBhanu Gollapudi 136853e2bd2SBhanu Gollapudi mutex_lock(&lport->disc.disc_mutex); 137853e2bd2SBhanu Gollapudi lport->tt.rport_logoff(rdata); 138853e2bd2SBhanu Gollapudi mutex_unlock(&lport->disc.disc_mutex); 139853e2bd2SBhanu Gollapudi } 140853e2bd2SBhanu Gollapudi return; 141853e2bd2SBhanu Gollapudi } else { 142853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO already in " 143853e2bd2SBhanu Gollapudi "ABTS processing\n"); 144853e2bd2SBhanu Gollapudi } 145853e2bd2SBhanu Gollapudi } 146853e2bd2SBhanu Gollapudi break; 147853e2bd2SBhanu Gollapudi case BNX2FC_ELS: 148853e2bd2SBhanu Gollapudi 149853e2bd2SBhanu Gollapudi if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 150853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n"); 151853e2bd2SBhanu Gollapudi 152853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 153853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 154853e2bd2SBhanu Gollapudi lport = io_req->port->lport; 155853e2bd2SBhanu Gollapudi rdata = io_req->tgt->rdata; 156853e2bd2SBhanu Gollapudi logo_issued = test_and_set_bit( 157853e2bd2SBhanu Gollapudi BNX2FC_FLAG_EXPL_LOGO, 158853e2bd2SBhanu Gollapudi &tgt->flags); 159853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 160853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 161853e2bd2SBhanu Gollapudi 162853e2bd2SBhanu Gollapudi /* Explicitly logo the target */ 163853e2bd2SBhanu Gollapudi if (!logo_issued) { 164853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Explicitly logo" 165853e2bd2SBhanu Gollapudi "(els)\n"); 166853e2bd2SBhanu Gollapudi mutex_lock(&lport->disc.disc_mutex); 167853e2bd2SBhanu Gollapudi lport->tt.rport_logoff(rdata); 168853e2bd2SBhanu Gollapudi mutex_unlock(&lport->disc.disc_mutex); 169853e2bd2SBhanu Gollapudi } 170853e2bd2SBhanu Gollapudi return; 171853e2bd2SBhanu Gollapudi } 172853e2bd2SBhanu Gollapudi } else { 173853e2bd2SBhanu Gollapudi /* 174853e2bd2SBhanu Gollapudi * Handle ELS timeout. 175853e2bd2SBhanu Gollapudi * tgt_lock is used to sync compl path and timeout 176853e2bd2SBhanu Gollapudi * path. If els compl path is processing this IO, we 177853e2bd2SBhanu Gollapudi * have nothing to do here, just release the timer hold 178853e2bd2SBhanu Gollapudi */ 179853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ELS timed out\n"); 180853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, 181853e2bd2SBhanu Gollapudi &io_req->req_flags)) 182853e2bd2SBhanu Gollapudi goto done; 183853e2bd2SBhanu Gollapudi 184853e2bd2SBhanu Gollapudi /* Indicate the cb_func that this ELS is timed out */ 185853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags); 186853e2bd2SBhanu Gollapudi 187853e2bd2SBhanu Gollapudi if ((io_req->cb_func) && (io_req->cb_arg)) { 188853e2bd2SBhanu Gollapudi io_req->cb_func(io_req->cb_arg); 189853e2bd2SBhanu Gollapudi io_req->cb_arg = NULL; 190853e2bd2SBhanu Gollapudi } 191853e2bd2SBhanu Gollapudi } 192853e2bd2SBhanu Gollapudi break; 193853e2bd2SBhanu Gollapudi default: 194853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n", 195853e2bd2SBhanu Gollapudi cmd_type); 196853e2bd2SBhanu Gollapudi break; 197853e2bd2SBhanu Gollapudi } 198853e2bd2SBhanu Gollapudi 199853e2bd2SBhanu Gollapudi done: 200853e2bd2SBhanu Gollapudi /* release the cmd that was held when timer was set */ 201853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 202853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 203853e2bd2SBhanu Gollapudi } 204853e2bd2SBhanu Gollapudi 205853e2bd2SBhanu Gollapudi static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code) 206853e2bd2SBhanu Gollapudi { 207853e2bd2SBhanu Gollapudi /* Called with host lock held */ 208853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 209853e2bd2SBhanu Gollapudi 210853e2bd2SBhanu Gollapudi /* 211853e2bd2SBhanu Gollapudi * active_cmd_queue may have other command types as well, 212853e2bd2SBhanu Gollapudi * and during flush operation, we want to error back only 213853e2bd2SBhanu Gollapudi * scsi commands. 214853e2bd2SBhanu Gollapudi */ 215853e2bd2SBhanu Gollapudi if (io_req->cmd_type != BNX2FC_SCSI_CMD) 216853e2bd2SBhanu Gollapudi return; 217853e2bd2SBhanu Gollapudi 218853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code); 21974446954SBhanu Prakash Gollapudi if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) { 22074446954SBhanu Prakash Gollapudi /* Do not call scsi done for this IO */ 22174446954SBhanu Prakash Gollapudi return; 22274446954SBhanu Prakash Gollapudi } 22374446954SBhanu Prakash Gollapudi 224853e2bd2SBhanu Gollapudi bnx2fc_unmap_sg_list(io_req); 225853e2bd2SBhanu Gollapudi io_req->sc_cmd = NULL; 226853e2bd2SBhanu Gollapudi if (!sc_cmd) { 227853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. " 228853e2bd2SBhanu Gollapudi "IO(0x%x) already cleaned up\n", 229853e2bd2SBhanu Gollapudi io_req->xid); 230853e2bd2SBhanu Gollapudi return; 231853e2bd2SBhanu Gollapudi } 232853e2bd2SBhanu Gollapudi sc_cmd->result = err_code << 16; 233853e2bd2SBhanu Gollapudi 234853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n", 235853e2bd2SBhanu Gollapudi sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries, 236853e2bd2SBhanu Gollapudi sc_cmd->allowed); 237853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 238853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = NULL; 239853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 240853e2bd2SBhanu Gollapudi } 241853e2bd2SBhanu Gollapudi 242853e2bd2SBhanu Gollapudi struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba, 243853e2bd2SBhanu Gollapudi u16 min_xid, u16 max_xid) 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; 255853e2bd2SBhanu Gollapudi 256853e2bd2SBhanu Gollapudi if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { 257853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \ 258853e2bd2SBhanu Gollapudi and max_xid 0x%x\n", min_xid, max_xid); 259853e2bd2SBhanu Gollapudi return NULL; 260853e2bd2SBhanu Gollapudi } 261853e2bd2SBhanu Gollapudi BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid); 262853e2bd2SBhanu Gollapudi 263853e2bd2SBhanu Gollapudi num_ios = max_xid - min_xid + 1; 264853e2bd2SBhanu Gollapudi len = (num_ios * (sizeof(struct bnx2fc_cmd *))); 265853e2bd2SBhanu Gollapudi len += sizeof(struct bnx2fc_cmd_mgr); 266853e2bd2SBhanu Gollapudi 267853e2bd2SBhanu Gollapudi cmgr = kzalloc(len, GFP_KERNEL); 268853e2bd2SBhanu Gollapudi if (!cmgr) { 269853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc cmgr\n"); 270853e2bd2SBhanu Gollapudi return NULL; 271853e2bd2SBhanu Gollapudi } 272853e2bd2SBhanu Gollapudi 273853e2bd2SBhanu Gollapudi cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) * 2740ea5c275SBhanu Gollapudi arr_sz, GFP_KERNEL); 275853e2bd2SBhanu Gollapudi if (!cmgr->free_list) { 276853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc free_list\n"); 277853e2bd2SBhanu Gollapudi goto mem_err; 278853e2bd2SBhanu Gollapudi } 279853e2bd2SBhanu Gollapudi 280853e2bd2SBhanu Gollapudi cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) * 2810ea5c275SBhanu Gollapudi arr_sz, GFP_KERNEL); 282853e2bd2SBhanu Gollapudi if (!cmgr->free_list_lock) { 283853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc free_list_lock\n"); 284853e2bd2SBhanu Gollapudi goto mem_err; 285853e2bd2SBhanu Gollapudi } 286853e2bd2SBhanu Gollapudi 287853e2bd2SBhanu Gollapudi cmgr->hba = hba; 288853e2bd2SBhanu Gollapudi cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1); 289853e2bd2SBhanu Gollapudi 2900ea5c275SBhanu Gollapudi for (i = 0; i < arr_sz; i++) { 291853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&cmgr->free_list[i]); 292853e2bd2SBhanu Gollapudi spin_lock_init(&cmgr->free_list_lock[i]); 293853e2bd2SBhanu Gollapudi } 294853e2bd2SBhanu Gollapudi 2950ea5c275SBhanu Gollapudi /* 2960ea5c275SBhanu Gollapudi * Pre-allocated pool of bnx2fc_cmds. 2970ea5c275SBhanu Gollapudi * Last entry in the free list array is the free list 2980ea5c275SBhanu Gollapudi * of slow path requests. 2990ea5c275SBhanu Gollapudi */ 300853e2bd2SBhanu Gollapudi xid = BNX2FC_MIN_XID; 3010ea5c275SBhanu Gollapudi num_pri_ios = num_ios - BNX2FC_ELSTM_XIDS; 302853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 303853e2bd2SBhanu Gollapudi io_req = kzalloc(sizeof(*io_req), GFP_KERNEL); 304853e2bd2SBhanu Gollapudi 305853e2bd2SBhanu Gollapudi if (!io_req) { 306853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc io_req\n"); 307853e2bd2SBhanu Gollapudi goto mem_err; 308853e2bd2SBhanu Gollapudi } 309853e2bd2SBhanu Gollapudi 310853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link); 311853e2bd2SBhanu Gollapudi INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout); 312853e2bd2SBhanu Gollapudi 313853e2bd2SBhanu Gollapudi io_req->xid = xid++; 3140ea5c275SBhanu Gollapudi if (i < num_pri_ios) 315853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, 3160ea5c275SBhanu Gollapudi &cmgr->free_list[io_req->xid % 3170ea5c275SBhanu Gollapudi num_possible_cpus()]); 3180ea5c275SBhanu Gollapudi else 3190ea5c275SBhanu Gollapudi list_add_tail(&io_req->link, 3200ea5c275SBhanu Gollapudi &cmgr->free_list[num_possible_cpus()]); 321853e2bd2SBhanu Gollapudi io_req++; 322853e2bd2SBhanu Gollapudi } 323853e2bd2SBhanu Gollapudi 324853e2bd2SBhanu Gollapudi /* Allocate pool of io_bdts - one for each bnx2fc_cmd */ 325853e2bd2SBhanu Gollapudi mem_size = num_ios * sizeof(struct io_bdt *); 326853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL); 327853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool) { 328853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n"); 329853e2bd2SBhanu Gollapudi goto mem_err; 330853e2bd2SBhanu Gollapudi } 331853e2bd2SBhanu Gollapudi 332853e2bd2SBhanu Gollapudi mem_size = sizeof(struct io_bdt); 333853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 334853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL); 335853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool[i]) { 336853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc " 337853e2bd2SBhanu Gollapudi "io_bdt_pool[%d]\n", i); 338853e2bd2SBhanu Gollapudi goto mem_err; 339853e2bd2SBhanu Gollapudi } 340853e2bd2SBhanu Gollapudi } 341853e2bd2SBhanu Gollapudi 342853e2bd2SBhanu Gollapudi /* Allocate an map fcoe_bdt_ctx structures */ 343853e2bd2SBhanu Gollapudi bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); 344853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 345853e2bd2SBhanu Gollapudi bdt_info = cmgr->io_bdt_pool[i]; 346853e2bd2SBhanu Gollapudi bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, 347853e2bd2SBhanu Gollapudi bd_tbl_sz, 348853e2bd2SBhanu Gollapudi &bdt_info->bd_tbl_dma, 349853e2bd2SBhanu Gollapudi GFP_KERNEL); 350853e2bd2SBhanu Gollapudi if (!bdt_info->bd_tbl) { 351853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc " 352853e2bd2SBhanu Gollapudi "bdt_tbl[%d]\n", i); 353853e2bd2SBhanu Gollapudi goto mem_err; 354853e2bd2SBhanu Gollapudi } 355853e2bd2SBhanu Gollapudi } 356853e2bd2SBhanu Gollapudi 357853e2bd2SBhanu Gollapudi return cmgr; 358853e2bd2SBhanu Gollapudi 359853e2bd2SBhanu Gollapudi mem_err: 360853e2bd2SBhanu Gollapudi bnx2fc_cmd_mgr_free(cmgr); 361853e2bd2SBhanu Gollapudi return NULL; 362853e2bd2SBhanu Gollapudi } 363853e2bd2SBhanu Gollapudi 364853e2bd2SBhanu Gollapudi void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr) 365853e2bd2SBhanu Gollapudi { 366853e2bd2SBhanu Gollapudi struct io_bdt *bdt_info; 367853e2bd2SBhanu Gollapudi struct bnx2fc_hba *hba = cmgr->hba; 368853e2bd2SBhanu Gollapudi size_t bd_tbl_sz; 369853e2bd2SBhanu Gollapudi u16 min_xid = BNX2FC_MIN_XID; 370853e2bd2SBhanu Gollapudi u16 max_xid = BNX2FC_MAX_XID; 371853e2bd2SBhanu Gollapudi int num_ios; 372853e2bd2SBhanu Gollapudi int i; 373853e2bd2SBhanu Gollapudi 374853e2bd2SBhanu Gollapudi num_ios = max_xid - min_xid + 1; 375853e2bd2SBhanu Gollapudi 376853e2bd2SBhanu Gollapudi /* Free fcoe_bdt_ctx structures */ 377853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool) 378853e2bd2SBhanu Gollapudi goto free_cmd_pool; 379853e2bd2SBhanu Gollapudi 380853e2bd2SBhanu Gollapudi bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); 381853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 382853e2bd2SBhanu Gollapudi bdt_info = cmgr->io_bdt_pool[i]; 383853e2bd2SBhanu Gollapudi if (bdt_info->bd_tbl) { 384853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz, 385853e2bd2SBhanu Gollapudi bdt_info->bd_tbl, 386853e2bd2SBhanu Gollapudi bdt_info->bd_tbl_dma); 387853e2bd2SBhanu Gollapudi bdt_info->bd_tbl = NULL; 388853e2bd2SBhanu Gollapudi } 389853e2bd2SBhanu Gollapudi } 390853e2bd2SBhanu Gollapudi 391853e2bd2SBhanu Gollapudi /* Destroy io_bdt pool */ 392853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 393853e2bd2SBhanu Gollapudi kfree(cmgr->io_bdt_pool[i]); 394853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool[i] = NULL; 395853e2bd2SBhanu Gollapudi } 396853e2bd2SBhanu Gollapudi 397853e2bd2SBhanu Gollapudi kfree(cmgr->io_bdt_pool); 398853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool = NULL; 399853e2bd2SBhanu Gollapudi 400853e2bd2SBhanu Gollapudi free_cmd_pool: 401853e2bd2SBhanu Gollapudi kfree(cmgr->free_list_lock); 402853e2bd2SBhanu Gollapudi 403853e2bd2SBhanu Gollapudi /* Destroy cmd pool */ 404853e2bd2SBhanu Gollapudi if (!cmgr->free_list) 405853e2bd2SBhanu Gollapudi goto free_cmgr; 406853e2bd2SBhanu Gollapudi 4070ea5c275SBhanu Gollapudi for (i = 0; i < num_possible_cpus() + 1; i++) { 408853e2bd2SBhanu Gollapudi struct list_head *list; 409853e2bd2SBhanu Gollapudi struct list_head *tmp; 410853e2bd2SBhanu Gollapudi 411853e2bd2SBhanu Gollapudi list_for_each_safe(list, tmp, &cmgr->free_list[i]) { 412853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req = (struct bnx2fc_cmd *)list; 413853e2bd2SBhanu Gollapudi list_del(&io_req->link); 414853e2bd2SBhanu Gollapudi kfree(io_req); 415853e2bd2SBhanu Gollapudi } 416853e2bd2SBhanu Gollapudi } 417853e2bd2SBhanu Gollapudi kfree(cmgr->free_list); 418853e2bd2SBhanu Gollapudi free_cmgr: 419853e2bd2SBhanu Gollapudi /* Free command manager itself */ 420853e2bd2SBhanu Gollapudi kfree(cmgr); 421853e2bd2SBhanu Gollapudi } 422853e2bd2SBhanu Gollapudi 423853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type) 424853e2bd2SBhanu Gollapudi { 425853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port; 426aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv; 427aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; 428853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 429853e2bd2SBhanu Gollapudi struct list_head *listp; 430853e2bd2SBhanu Gollapudi struct io_bdt *bd_tbl; 4310ea5c275SBhanu Gollapudi int index = RESERVE_FREE_LIST_INDEX; 432619c5cb6SVlad Zolotarov u32 free_sqes; 433853e2bd2SBhanu Gollapudi u32 max_sqes; 434853e2bd2SBhanu Gollapudi u16 xid; 435853e2bd2SBhanu Gollapudi 436853e2bd2SBhanu Gollapudi max_sqes = tgt->max_sqes; 437853e2bd2SBhanu Gollapudi switch (type) { 438853e2bd2SBhanu Gollapudi case BNX2FC_TASK_MGMT_CMD: 439853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_TM_MAX_SQES; 440853e2bd2SBhanu Gollapudi break; 441853e2bd2SBhanu Gollapudi case BNX2FC_ELS: 442853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_ELS_MAX_SQES; 443853e2bd2SBhanu Gollapudi break; 444853e2bd2SBhanu Gollapudi default: 445853e2bd2SBhanu Gollapudi break; 446853e2bd2SBhanu Gollapudi } 447853e2bd2SBhanu Gollapudi 448853e2bd2SBhanu Gollapudi /* 449853e2bd2SBhanu Gollapudi * NOTE: Free list insertions and deletions are protected with 450853e2bd2SBhanu Gollapudi * cmgr lock 451853e2bd2SBhanu Gollapudi */ 4520ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]); 453619c5cb6SVlad Zolotarov free_sqes = atomic_read(&tgt->free_sqes); 4540ea5c275SBhanu Gollapudi if ((list_empty(&(cmd_mgr->free_list[index]))) || 455619c5cb6SVlad Zolotarov (tgt->num_active_ios.counter >= max_sqes) || 456619c5cb6SVlad Zolotarov (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { 457853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available " 458853e2bd2SBhanu Gollapudi "ios(%d):sqes(%d)\n", 459853e2bd2SBhanu Gollapudi tgt->num_active_ios.counter, tgt->max_sqes); 4600ea5c275SBhanu Gollapudi if (list_empty(&(cmd_mgr->free_list[index]))) 461853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "elstm_alloc: list_empty\n"); 4620ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 463853e2bd2SBhanu Gollapudi return NULL; 464853e2bd2SBhanu Gollapudi } 465853e2bd2SBhanu Gollapudi 466853e2bd2SBhanu Gollapudi listp = (struct list_head *) 4670ea5c275SBhanu Gollapudi cmd_mgr->free_list[index].next; 468853e2bd2SBhanu Gollapudi list_del_init(listp); 469853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *) listp; 470853e2bd2SBhanu Gollapudi xid = io_req->xid; 471853e2bd2SBhanu Gollapudi cmd_mgr->cmds[xid] = io_req; 472853e2bd2SBhanu Gollapudi atomic_inc(&tgt->num_active_ios); 473619c5cb6SVlad Zolotarov atomic_dec(&tgt->free_sqes); 4740ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 475853e2bd2SBhanu Gollapudi 476853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link); 477853e2bd2SBhanu Gollapudi 478853e2bd2SBhanu Gollapudi io_req->port = port; 479853e2bd2SBhanu Gollapudi io_req->cmd_mgr = cmd_mgr; 480853e2bd2SBhanu Gollapudi io_req->req_flags = 0; 481853e2bd2SBhanu Gollapudi io_req->cmd_type = type; 482853e2bd2SBhanu Gollapudi 483853e2bd2SBhanu Gollapudi /* Bind io_bdt for this io_req */ 484853e2bd2SBhanu Gollapudi /* Have a static link between io_req and io_bdt_pool */ 485853e2bd2SBhanu Gollapudi bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 486853e2bd2SBhanu Gollapudi bd_tbl->io_req = io_req; 487853e2bd2SBhanu Gollapudi 488853e2bd2SBhanu Gollapudi /* Hold the io_req against deletion */ 489853e2bd2SBhanu Gollapudi kref_init(&io_req->refcount); 490853e2bd2SBhanu Gollapudi return io_req; 491853e2bd2SBhanu Gollapudi } 492aea71a02SBhanu Prakash Gollapudi 493aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt) 494853e2bd2SBhanu Gollapudi { 495853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port; 496aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv; 497aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; 498853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 499853e2bd2SBhanu Gollapudi struct list_head *listp; 500853e2bd2SBhanu Gollapudi struct io_bdt *bd_tbl; 501619c5cb6SVlad Zolotarov u32 free_sqes; 502853e2bd2SBhanu Gollapudi u32 max_sqes; 503853e2bd2SBhanu Gollapudi u16 xid; 5040ea5c275SBhanu Gollapudi int index = get_cpu(); 505853e2bd2SBhanu Gollapudi 506853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_SCSI_MAX_SQES; 507853e2bd2SBhanu Gollapudi /* 508853e2bd2SBhanu Gollapudi * NOTE: Free list insertions and deletions are protected with 509853e2bd2SBhanu Gollapudi * cmgr lock 510853e2bd2SBhanu Gollapudi */ 5110ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]); 512619c5cb6SVlad Zolotarov free_sqes = atomic_read(&tgt->free_sqes); 5130ea5c275SBhanu Gollapudi if ((list_empty(&cmd_mgr->free_list[index])) || 514619c5cb6SVlad Zolotarov (tgt->num_active_ios.counter >= max_sqes) || 515619c5cb6SVlad Zolotarov (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { 5160ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 5170ea5c275SBhanu Gollapudi put_cpu(); 518853e2bd2SBhanu Gollapudi return NULL; 519853e2bd2SBhanu Gollapudi } 520853e2bd2SBhanu Gollapudi 521853e2bd2SBhanu Gollapudi listp = (struct list_head *) 5220ea5c275SBhanu Gollapudi cmd_mgr->free_list[index].next; 523853e2bd2SBhanu Gollapudi list_del_init(listp); 524853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *) listp; 525853e2bd2SBhanu Gollapudi xid = io_req->xid; 526853e2bd2SBhanu Gollapudi cmd_mgr->cmds[xid] = io_req; 527853e2bd2SBhanu Gollapudi atomic_inc(&tgt->num_active_ios); 528619c5cb6SVlad Zolotarov atomic_dec(&tgt->free_sqes); 5290ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 5300ea5c275SBhanu Gollapudi put_cpu(); 531853e2bd2SBhanu Gollapudi 532853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link); 533853e2bd2SBhanu Gollapudi 534853e2bd2SBhanu Gollapudi io_req->port = port; 535853e2bd2SBhanu Gollapudi io_req->cmd_mgr = cmd_mgr; 536853e2bd2SBhanu Gollapudi io_req->req_flags = 0; 537853e2bd2SBhanu Gollapudi 538853e2bd2SBhanu Gollapudi /* Bind io_bdt for this io_req */ 539853e2bd2SBhanu Gollapudi /* Have a static link between io_req and io_bdt_pool */ 540853e2bd2SBhanu Gollapudi bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 541853e2bd2SBhanu Gollapudi bd_tbl->io_req = io_req; 542853e2bd2SBhanu Gollapudi 543853e2bd2SBhanu Gollapudi /* Hold the io_req against deletion */ 544853e2bd2SBhanu Gollapudi kref_init(&io_req->refcount); 545853e2bd2SBhanu Gollapudi return io_req; 546853e2bd2SBhanu Gollapudi } 547853e2bd2SBhanu Gollapudi 548853e2bd2SBhanu Gollapudi void bnx2fc_cmd_release(struct kref *ref) 549853e2bd2SBhanu Gollapudi { 550853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req = container_of(ref, 551853e2bd2SBhanu Gollapudi struct bnx2fc_cmd, refcount); 552853e2bd2SBhanu Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; 5530ea5c275SBhanu Gollapudi int index; 554853e2bd2SBhanu Gollapudi 5550ea5c275SBhanu Gollapudi if (io_req->cmd_type == BNX2FC_SCSI_CMD) 5560ea5c275SBhanu Gollapudi index = io_req->xid % num_possible_cpus(); 5570ea5c275SBhanu Gollapudi else 5580ea5c275SBhanu Gollapudi index = RESERVE_FREE_LIST_INDEX; 5590ea5c275SBhanu Gollapudi 5600ea5c275SBhanu Gollapudi 5610ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]); 562853e2bd2SBhanu Gollapudi if (io_req->cmd_type != BNX2FC_SCSI_CMD) 563853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 564853e2bd2SBhanu Gollapudi cmd_mgr->cmds[io_req->xid] = NULL; 565853e2bd2SBhanu Gollapudi /* Delete IO from retire queue */ 566853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 567853e2bd2SBhanu Gollapudi /* Add it to the free list */ 568853e2bd2SBhanu Gollapudi list_add(&io_req->link, 5690ea5c275SBhanu Gollapudi &cmd_mgr->free_list[index]); 570853e2bd2SBhanu Gollapudi atomic_dec(&io_req->tgt->num_active_ios); 5710ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 5720ea5c275SBhanu Gollapudi 573853e2bd2SBhanu Gollapudi } 574853e2bd2SBhanu Gollapudi 575853e2bd2SBhanu Gollapudi static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) 576853e2bd2SBhanu Gollapudi { 577853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); 578aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 579aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 580853e2bd2SBhanu Gollapudi size_t sz = sizeof(struct fcoe_bd_ctx); 581853e2bd2SBhanu Gollapudi 582853e2bd2SBhanu Gollapudi /* clear tm flags */ 583853e2bd2SBhanu Gollapudi mp_req->tm_flags = 0; 584853e2bd2SBhanu Gollapudi if (mp_req->mp_req_bd) { 585853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, sz, 586853e2bd2SBhanu Gollapudi mp_req->mp_req_bd, 587853e2bd2SBhanu Gollapudi mp_req->mp_req_bd_dma); 588853e2bd2SBhanu Gollapudi mp_req->mp_req_bd = NULL; 589853e2bd2SBhanu Gollapudi } 590853e2bd2SBhanu Gollapudi if (mp_req->mp_resp_bd) { 591853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, sz, 592853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd, 593853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd_dma); 594853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd = NULL; 595853e2bd2SBhanu Gollapudi } 596853e2bd2SBhanu Gollapudi if (mp_req->req_buf) { 597853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 598853e2bd2SBhanu Gollapudi mp_req->req_buf, 599853e2bd2SBhanu Gollapudi mp_req->req_buf_dma); 600853e2bd2SBhanu Gollapudi mp_req->req_buf = NULL; 601853e2bd2SBhanu Gollapudi } 602853e2bd2SBhanu Gollapudi if (mp_req->resp_buf) { 603853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 604853e2bd2SBhanu Gollapudi mp_req->resp_buf, 605853e2bd2SBhanu Gollapudi mp_req->resp_buf_dma); 606853e2bd2SBhanu Gollapudi mp_req->resp_buf = NULL; 607853e2bd2SBhanu Gollapudi } 608853e2bd2SBhanu Gollapudi } 609853e2bd2SBhanu Gollapudi 610853e2bd2SBhanu Gollapudi int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) 611853e2bd2SBhanu Gollapudi { 612853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *mp_req; 613853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *mp_req_bd; 614853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *mp_resp_bd; 615aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 616aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 617853e2bd2SBhanu Gollapudi dma_addr_t addr; 618853e2bd2SBhanu Gollapudi size_t sz; 619853e2bd2SBhanu Gollapudi 620853e2bd2SBhanu Gollapudi mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 621853e2bd2SBhanu Gollapudi memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); 622853e2bd2SBhanu Gollapudi 623853e2bd2SBhanu Gollapudi mp_req->req_len = sizeof(struct fcp_cmnd); 624853e2bd2SBhanu Gollapudi io_req->data_xfer_len = mp_req->req_len; 625853e2bd2SBhanu Gollapudi mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 626853e2bd2SBhanu Gollapudi &mp_req->req_buf_dma, 627853e2bd2SBhanu Gollapudi GFP_ATOMIC); 628853e2bd2SBhanu Gollapudi if (!mp_req->req_buf) { 629853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP req buffer\n"); 630853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 631853e2bd2SBhanu Gollapudi return FAILED; 632853e2bd2SBhanu Gollapudi } 633853e2bd2SBhanu Gollapudi 634853e2bd2SBhanu Gollapudi mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 635853e2bd2SBhanu Gollapudi &mp_req->resp_buf_dma, 636853e2bd2SBhanu Gollapudi GFP_ATOMIC); 637853e2bd2SBhanu Gollapudi if (!mp_req->resp_buf) { 638853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc TM resp buffer\n"); 639853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 640853e2bd2SBhanu Gollapudi return FAILED; 641853e2bd2SBhanu Gollapudi } 642853e2bd2SBhanu Gollapudi memset(mp_req->req_buf, 0, PAGE_SIZE); 643853e2bd2SBhanu Gollapudi memset(mp_req->resp_buf, 0, PAGE_SIZE); 644853e2bd2SBhanu Gollapudi 645853e2bd2SBhanu Gollapudi /* Allocate and map mp_req_bd and mp_resp_bd */ 646853e2bd2SBhanu Gollapudi sz = sizeof(struct fcoe_bd_ctx); 647853e2bd2SBhanu Gollapudi mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 648853e2bd2SBhanu Gollapudi &mp_req->mp_req_bd_dma, 649853e2bd2SBhanu Gollapudi GFP_ATOMIC); 650853e2bd2SBhanu Gollapudi if (!mp_req->mp_req_bd) { 651853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP req bd\n"); 652853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 653853e2bd2SBhanu Gollapudi return FAILED; 654853e2bd2SBhanu Gollapudi } 655853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 656853e2bd2SBhanu Gollapudi &mp_req->mp_resp_bd_dma, 657853e2bd2SBhanu Gollapudi GFP_ATOMIC); 658853e2bd2SBhanu Gollapudi if (!mp_req->mp_req_bd) { 659853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP resp bd\n"); 660853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 661853e2bd2SBhanu Gollapudi return FAILED; 662853e2bd2SBhanu Gollapudi } 663853e2bd2SBhanu Gollapudi /* Fill bd table */ 664853e2bd2SBhanu Gollapudi addr = mp_req->req_buf_dma; 665853e2bd2SBhanu Gollapudi mp_req_bd = mp_req->mp_req_bd; 666853e2bd2SBhanu Gollapudi mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; 667853e2bd2SBhanu Gollapudi mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); 668853e2bd2SBhanu Gollapudi mp_req_bd->buf_len = PAGE_SIZE; 669853e2bd2SBhanu Gollapudi mp_req_bd->flags = 0; 670853e2bd2SBhanu Gollapudi 671853e2bd2SBhanu Gollapudi /* 672853e2bd2SBhanu Gollapudi * MP buffer is either a task mgmt command or an ELS. 673853e2bd2SBhanu Gollapudi * So the assumption is that it consumes a single bd 674853e2bd2SBhanu Gollapudi * entry in the bd table 675853e2bd2SBhanu Gollapudi */ 676853e2bd2SBhanu Gollapudi mp_resp_bd = mp_req->mp_resp_bd; 677853e2bd2SBhanu Gollapudi addr = mp_req->resp_buf_dma; 678853e2bd2SBhanu Gollapudi mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; 679853e2bd2SBhanu Gollapudi mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); 680853e2bd2SBhanu Gollapudi mp_resp_bd->buf_len = PAGE_SIZE; 681853e2bd2SBhanu Gollapudi mp_resp_bd->flags = 0; 682853e2bd2SBhanu Gollapudi 683853e2bd2SBhanu Gollapudi return SUCCESS; 684853e2bd2SBhanu Gollapudi } 685853e2bd2SBhanu Gollapudi 686853e2bd2SBhanu Gollapudi static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 687853e2bd2SBhanu Gollapudi { 688853e2bd2SBhanu Gollapudi struct fc_lport *lport; 689853e2bd2SBhanu Gollapudi struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 690853e2bd2SBhanu Gollapudi struct fc_rport_libfc_priv *rp = rport->dd_data; 691853e2bd2SBhanu Gollapudi struct fcoe_port *port; 692aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 693853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt; 694853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 695853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *tm_req; 696853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 697853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 698853e2bd2SBhanu Gollapudi struct Scsi_Host *host = sc_cmd->device->host; 699853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr; 700853e2bd2SBhanu Gollapudi struct fcp_cmnd *fcp_cmnd; 701853e2bd2SBhanu Gollapudi int task_idx, index; 702853e2bd2SBhanu Gollapudi int rc = SUCCESS; 703853e2bd2SBhanu Gollapudi u16 xid; 704853e2bd2SBhanu Gollapudi u32 sid, did; 705853e2bd2SBhanu Gollapudi unsigned long start = jiffies; 706853e2bd2SBhanu Gollapudi 707853e2bd2SBhanu Gollapudi lport = shost_priv(host); 708853e2bd2SBhanu Gollapudi port = lport_priv(lport); 709aea71a02SBhanu Prakash Gollapudi interface = port->priv; 710853e2bd2SBhanu Gollapudi 711853e2bd2SBhanu Gollapudi if (rport == NULL) { 712b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "device_reset: rport is NULL\n"); 713853e2bd2SBhanu Gollapudi rc = FAILED; 714853e2bd2SBhanu Gollapudi goto tmf_err; 715853e2bd2SBhanu Gollapudi } 716853e2bd2SBhanu Gollapudi 717853e2bd2SBhanu Gollapudi rc = fc_block_scsi_eh(sc_cmd); 718853e2bd2SBhanu Gollapudi if (rc) 719853e2bd2SBhanu Gollapudi return rc; 720853e2bd2SBhanu Gollapudi 721853e2bd2SBhanu Gollapudi if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 722853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "device_reset: link is not ready\n"); 723853e2bd2SBhanu Gollapudi rc = FAILED; 724853e2bd2SBhanu Gollapudi goto tmf_err; 725853e2bd2SBhanu Gollapudi } 726853e2bd2SBhanu Gollapudi /* rport and tgt are allocated together, so tgt should be non-NULL */ 727853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1]; 728853e2bd2SBhanu Gollapudi 729853e2bd2SBhanu Gollapudi if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { 730853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); 731853e2bd2SBhanu Gollapudi rc = FAILED; 732853e2bd2SBhanu Gollapudi goto tmf_err; 733853e2bd2SBhanu Gollapudi } 734853e2bd2SBhanu Gollapudi retry_tmf: 735853e2bd2SBhanu Gollapudi io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); 736853e2bd2SBhanu Gollapudi if (!io_req) { 737853e2bd2SBhanu Gollapudi if (time_after(jiffies, start + HZ)) { 738853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tmf: Failed TMF"); 739853e2bd2SBhanu Gollapudi rc = FAILED; 740853e2bd2SBhanu Gollapudi goto tmf_err; 741853e2bd2SBhanu Gollapudi } 742853e2bd2SBhanu Gollapudi msleep(20); 743853e2bd2SBhanu Gollapudi goto retry_tmf; 744853e2bd2SBhanu Gollapudi } 745853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 746853e2bd2SBhanu Gollapudi io_req->sc_cmd = sc_cmd; 747853e2bd2SBhanu Gollapudi io_req->port = port; 748853e2bd2SBhanu Gollapudi io_req->tgt = tgt; 749853e2bd2SBhanu Gollapudi 750853e2bd2SBhanu Gollapudi tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 751853e2bd2SBhanu Gollapudi 752853e2bd2SBhanu Gollapudi rc = bnx2fc_init_mp_req(io_req); 753853e2bd2SBhanu Gollapudi if (rc == FAILED) { 754853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); 755bd4d5de8SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 756853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 757bd4d5de8SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 758853e2bd2SBhanu Gollapudi goto tmf_err; 759853e2bd2SBhanu Gollapudi } 760853e2bd2SBhanu Gollapudi 761853e2bd2SBhanu Gollapudi /* Set TM flags */ 762853e2bd2SBhanu Gollapudi io_req->io_req_flags = 0; 763853e2bd2SBhanu Gollapudi tm_req->tm_flags = tm_flags; 764853e2bd2SBhanu Gollapudi 765853e2bd2SBhanu Gollapudi /* Fill FCP_CMND */ 766853e2bd2SBhanu Gollapudi bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); 767853e2bd2SBhanu Gollapudi fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; 768853e2bd2SBhanu Gollapudi memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); 769853e2bd2SBhanu Gollapudi fcp_cmnd->fc_dl = 0; 770853e2bd2SBhanu Gollapudi 771853e2bd2SBhanu Gollapudi /* Fill FC header */ 772853e2bd2SBhanu Gollapudi fc_hdr = &(tm_req->req_fc_hdr); 773853e2bd2SBhanu Gollapudi sid = tgt->sid; 774853e2bd2SBhanu Gollapudi did = rport->port_id; 775853e2bd2SBhanu Gollapudi __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, 776853e2bd2SBhanu Gollapudi FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 777853e2bd2SBhanu Gollapudi FC_FC_SEQ_INIT, 0); 778853e2bd2SBhanu Gollapudi /* Obtain exchange id */ 779853e2bd2SBhanu Gollapudi xid = io_req->xid; 780853e2bd2SBhanu Gollapudi 781853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); 782853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 783853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 784853e2bd2SBhanu Gollapudi 785853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 786aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 787aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 788853e2bd2SBhanu Gollapudi task = &(task_page[index]); 789853e2bd2SBhanu Gollapudi bnx2fc_init_mp_task(io_req, task); 790853e2bd2SBhanu Gollapudi 791853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = (char *)io_req; 792853e2bd2SBhanu Gollapudi 793853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 794853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 795853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 796853e2bd2SBhanu Gollapudi 797853e2bd2SBhanu Gollapudi /* Enqueue the io_req to active_tm_queue */ 798853e2bd2SBhanu Gollapudi io_req->on_tmf_queue = 1; 799853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->active_tm_queue); 800853e2bd2SBhanu Gollapudi 801853e2bd2SBhanu Gollapudi init_completion(&io_req->tm_done); 802853e2bd2SBhanu Gollapudi io_req->wait_for_comp = 1; 803853e2bd2SBhanu Gollapudi 804853e2bd2SBhanu Gollapudi /* Ring doorbell */ 805853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 806853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 807853e2bd2SBhanu Gollapudi 808853e2bd2SBhanu Gollapudi rc = wait_for_completion_timeout(&io_req->tm_done, 809853e2bd2SBhanu Gollapudi BNX2FC_TM_TIMEOUT * HZ); 810853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 811853e2bd2SBhanu Gollapudi 812853e2bd2SBhanu Gollapudi io_req->wait_for_comp = 0; 813853e2bd2SBhanu Gollapudi if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) 814853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); 815853e2bd2SBhanu Gollapudi 816853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 817853e2bd2SBhanu Gollapudi 818853e2bd2SBhanu Gollapudi if (!rc) { 819b2a554ffSBhanu Prakash Gollapudi BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n"); 820853e2bd2SBhanu Gollapudi rc = FAILED; 821853e2bd2SBhanu Gollapudi } else { 822b2a554ffSBhanu Prakash Gollapudi BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n"); 823853e2bd2SBhanu Gollapudi rc = SUCCESS; 824853e2bd2SBhanu Gollapudi } 825853e2bd2SBhanu Gollapudi tmf_err: 826853e2bd2SBhanu Gollapudi return rc; 827853e2bd2SBhanu Gollapudi } 828853e2bd2SBhanu Gollapudi 829853e2bd2SBhanu Gollapudi int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) 830853e2bd2SBhanu Gollapudi { 831853e2bd2SBhanu Gollapudi struct fc_lport *lport; 832853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 833853e2bd2SBhanu Gollapudi struct fc_rport *rport = tgt->rport; 834853e2bd2SBhanu Gollapudi struct fc_rport_priv *rdata = tgt->rdata; 835aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 836853e2bd2SBhanu Gollapudi struct fcoe_port *port; 837853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *abts_io_req; 838853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 839853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 840853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr; 841853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *abts_req; 842853e2bd2SBhanu Gollapudi int task_idx, index; 843853e2bd2SBhanu Gollapudi u32 sid, did; 844853e2bd2SBhanu Gollapudi u16 xid; 845853e2bd2SBhanu Gollapudi int rc = SUCCESS; 846853e2bd2SBhanu Gollapudi u32 r_a_tov = rdata->r_a_tov; 847853e2bd2SBhanu Gollapudi 848853e2bd2SBhanu Gollapudi /* called with tgt_lock held */ 849853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); 850853e2bd2SBhanu Gollapudi 851853e2bd2SBhanu Gollapudi port = io_req->port; 852aea71a02SBhanu Prakash Gollapudi interface = port->priv; 853853e2bd2SBhanu Gollapudi lport = port->lport; 854853e2bd2SBhanu Gollapudi 855853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 856853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); 857853e2bd2SBhanu Gollapudi rc = FAILED; 858853e2bd2SBhanu Gollapudi goto abts_err; 859853e2bd2SBhanu Gollapudi } 860853e2bd2SBhanu Gollapudi 861853e2bd2SBhanu Gollapudi if (rport == NULL) { 862b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "initiate_abts: rport is NULL\n"); 863853e2bd2SBhanu Gollapudi rc = FAILED; 864853e2bd2SBhanu Gollapudi goto abts_err; 865853e2bd2SBhanu Gollapudi } 866853e2bd2SBhanu Gollapudi 867853e2bd2SBhanu Gollapudi if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 868853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); 869853e2bd2SBhanu Gollapudi rc = FAILED; 870853e2bd2SBhanu Gollapudi goto abts_err; 871853e2bd2SBhanu Gollapudi } 872853e2bd2SBhanu Gollapudi 873853e2bd2SBhanu Gollapudi abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); 874853e2bd2SBhanu Gollapudi if (!abts_io_req) { 875853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "abts: couldnt allocate cmd\n"); 876853e2bd2SBhanu Gollapudi rc = FAILED; 877853e2bd2SBhanu Gollapudi goto abts_err; 878853e2bd2SBhanu Gollapudi } 879853e2bd2SBhanu Gollapudi 880853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 881853e2bd2SBhanu Gollapudi abts_io_req->sc_cmd = NULL; 882853e2bd2SBhanu Gollapudi abts_io_req->port = port; 883853e2bd2SBhanu Gollapudi abts_io_req->tgt = tgt; 884853e2bd2SBhanu Gollapudi abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ 885853e2bd2SBhanu Gollapudi 886853e2bd2SBhanu Gollapudi abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); 887853e2bd2SBhanu Gollapudi memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); 888853e2bd2SBhanu Gollapudi 889853e2bd2SBhanu Gollapudi /* Fill FC header */ 890853e2bd2SBhanu Gollapudi fc_hdr = &(abts_req->req_fc_hdr); 891853e2bd2SBhanu Gollapudi 892853e2bd2SBhanu Gollapudi /* Obtain oxid and rxid for the original exchange to be aborted */ 893853e2bd2SBhanu Gollapudi fc_hdr->fh_ox_id = htons(io_req->xid); 894619c5cb6SVlad Zolotarov fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id); 895853e2bd2SBhanu Gollapudi 896853e2bd2SBhanu Gollapudi sid = tgt->sid; 897853e2bd2SBhanu Gollapudi did = rport->port_id; 898853e2bd2SBhanu Gollapudi 899853e2bd2SBhanu Gollapudi __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, 900853e2bd2SBhanu Gollapudi FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 901853e2bd2SBhanu Gollapudi FC_FC_SEQ_INIT, 0); 902853e2bd2SBhanu Gollapudi 903853e2bd2SBhanu Gollapudi xid = abts_io_req->xid; 904853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); 905853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 906853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 907853e2bd2SBhanu Gollapudi 908853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 909aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 910aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 911853e2bd2SBhanu Gollapudi task = &(task_page[index]); 912853e2bd2SBhanu Gollapudi bnx2fc_init_mp_task(abts_io_req, task); 913853e2bd2SBhanu Gollapudi 914853e2bd2SBhanu Gollapudi /* 915853e2bd2SBhanu Gollapudi * ABTS task is a temporary task that will be cleaned up 916853e2bd2SBhanu Gollapudi * irrespective of ABTS response. We need to start the timer 917853e2bd2SBhanu Gollapudi * for the original exchange, as the CQE is posted for the original 918853e2bd2SBhanu Gollapudi * IO request. 919853e2bd2SBhanu Gollapudi * 920853e2bd2SBhanu Gollapudi * Timer for ABTS is started only when it is originated by a 921853e2bd2SBhanu Gollapudi * TM request. For the ABTS issued as part of ULP timeout, 922853e2bd2SBhanu Gollapudi * scsi-ml maintains the timers. 923853e2bd2SBhanu Gollapudi */ 924853e2bd2SBhanu Gollapudi 925853e2bd2SBhanu Gollapudi /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ 926853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); 927853e2bd2SBhanu Gollapudi 928853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 929853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 930853e2bd2SBhanu Gollapudi 931853e2bd2SBhanu Gollapudi /* Ring doorbell */ 932853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 933853e2bd2SBhanu Gollapudi 934853e2bd2SBhanu Gollapudi abts_err: 935853e2bd2SBhanu Gollapudi return rc; 936853e2bd2SBhanu Gollapudi } 937853e2bd2SBhanu Gollapudi 9386c5a7ce4SBhanu Prakash Gollapudi int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset, 9396c5a7ce4SBhanu Prakash Gollapudi enum fc_rctl r_ctl) 9406c5a7ce4SBhanu Prakash Gollapudi { 9416c5a7ce4SBhanu Prakash Gollapudi struct fc_lport *lport; 9426c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = orig_io_req->tgt; 9436c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 9446c5a7ce4SBhanu Prakash Gollapudi struct fcoe_port *port; 9456c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_cmd *seq_clnp_req; 9466c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task; 9476c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task_page; 9486c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_els_cb_arg *cb_arg = NULL; 9496c5a7ce4SBhanu Prakash Gollapudi int task_idx, index; 9506c5a7ce4SBhanu Prakash Gollapudi u16 xid; 9516c5a7ce4SBhanu Prakash Gollapudi int rc = 0; 9526c5a7ce4SBhanu Prakash Gollapudi 9536c5a7ce4SBhanu Prakash Gollapudi BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n", 9546c5a7ce4SBhanu Prakash Gollapudi orig_io_req->xid); 9556c5a7ce4SBhanu Prakash Gollapudi kref_get(&orig_io_req->refcount); 9566c5a7ce4SBhanu Prakash Gollapudi 9576c5a7ce4SBhanu Prakash Gollapudi port = orig_io_req->port; 9586c5a7ce4SBhanu Prakash Gollapudi interface = port->priv; 9596c5a7ce4SBhanu Prakash Gollapudi lport = port->lport; 9606c5a7ce4SBhanu Prakash Gollapudi 9616c5a7ce4SBhanu Prakash Gollapudi cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); 9626c5a7ce4SBhanu Prakash Gollapudi if (!cb_arg) { 9636c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n"); 9646c5a7ce4SBhanu Prakash Gollapudi rc = -ENOMEM; 9656c5a7ce4SBhanu Prakash Gollapudi goto cleanup_err; 9666c5a7ce4SBhanu Prakash Gollapudi } 9676c5a7ce4SBhanu Prakash Gollapudi 9686c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP); 9696c5a7ce4SBhanu Prakash Gollapudi if (!seq_clnp_req) { 9706c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); 9716c5a7ce4SBhanu Prakash Gollapudi rc = -ENOMEM; 9726c5a7ce4SBhanu Prakash Gollapudi kfree(cb_arg); 9736c5a7ce4SBhanu Prakash Gollapudi goto cleanup_err; 9746c5a7ce4SBhanu Prakash Gollapudi } 9756c5a7ce4SBhanu Prakash Gollapudi /* Initialize rest of io_req fields */ 9766c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->sc_cmd = NULL; 9776c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->port = port; 9786c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->tgt = tgt; 9796c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */ 9806c5a7ce4SBhanu Prakash Gollapudi 9816c5a7ce4SBhanu Prakash Gollapudi xid = seq_clnp_req->xid; 9826c5a7ce4SBhanu Prakash Gollapudi 9836c5a7ce4SBhanu Prakash Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 9846c5a7ce4SBhanu Prakash Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 9856c5a7ce4SBhanu Prakash Gollapudi 9866c5a7ce4SBhanu Prakash Gollapudi /* Initialize task context for this IO request */ 9876c5a7ce4SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 9886c5a7ce4SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 9896c5a7ce4SBhanu Prakash Gollapudi task = &(task_page[index]); 9906c5a7ce4SBhanu Prakash Gollapudi cb_arg->aborted_io_req = orig_io_req; 9916c5a7ce4SBhanu Prakash Gollapudi cb_arg->io_req = seq_clnp_req; 9926c5a7ce4SBhanu Prakash Gollapudi cb_arg->r_ctl = r_ctl; 9936c5a7ce4SBhanu Prakash Gollapudi cb_arg->offset = offset; 9946c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->cb_arg = cb_arg; 9956c5a7ce4SBhanu Prakash Gollapudi 9966c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "call init_seq_cleanup_task\n"); 9976c5a7ce4SBhanu Prakash Gollapudi bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset); 9986c5a7ce4SBhanu Prakash Gollapudi 9996c5a7ce4SBhanu Prakash Gollapudi /* Obtain free SQ entry */ 10006c5a7ce4SBhanu Prakash Gollapudi bnx2fc_add_2_sq(tgt, xid); 10016c5a7ce4SBhanu Prakash Gollapudi 10026c5a7ce4SBhanu Prakash Gollapudi /* Ring doorbell */ 10036c5a7ce4SBhanu Prakash Gollapudi bnx2fc_ring_doorbell(tgt); 10046c5a7ce4SBhanu Prakash Gollapudi cleanup_err: 10056c5a7ce4SBhanu Prakash Gollapudi return rc; 10066c5a7ce4SBhanu Prakash Gollapudi } 10076c5a7ce4SBhanu Prakash Gollapudi 1008853e2bd2SBhanu Gollapudi int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) 1009853e2bd2SBhanu Gollapudi { 1010853e2bd2SBhanu Gollapudi struct fc_lport *lport; 1011853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1012aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 1013853e2bd2SBhanu Gollapudi struct fcoe_port *port; 1014853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *cleanup_io_req; 1015853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 1016853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 1017853e2bd2SBhanu Gollapudi int task_idx, index; 1018853e2bd2SBhanu Gollapudi u16 xid, orig_xid; 1019853e2bd2SBhanu Gollapudi int rc = 0; 1020853e2bd2SBhanu Gollapudi 1021853e2bd2SBhanu Gollapudi /* ASSUMPTION: called with tgt_lock held */ 1022853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); 1023853e2bd2SBhanu Gollapudi 1024853e2bd2SBhanu Gollapudi port = io_req->port; 1025aea71a02SBhanu Prakash Gollapudi interface = port->priv; 1026853e2bd2SBhanu Gollapudi lport = port->lport; 1027853e2bd2SBhanu Gollapudi 1028853e2bd2SBhanu Gollapudi cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); 1029853e2bd2SBhanu Gollapudi if (!cleanup_io_req) { 1030853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); 1031853e2bd2SBhanu Gollapudi rc = -1; 1032853e2bd2SBhanu Gollapudi goto cleanup_err; 1033853e2bd2SBhanu Gollapudi } 1034853e2bd2SBhanu Gollapudi 1035853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 1036853e2bd2SBhanu Gollapudi cleanup_io_req->sc_cmd = NULL; 1037853e2bd2SBhanu Gollapudi cleanup_io_req->port = port; 1038853e2bd2SBhanu Gollapudi cleanup_io_req->tgt = tgt; 1039853e2bd2SBhanu Gollapudi cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ 1040853e2bd2SBhanu Gollapudi 1041853e2bd2SBhanu Gollapudi xid = cleanup_io_req->xid; 1042853e2bd2SBhanu Gollapudi 1043853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 1044853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 1045853e2bd2SBhanu Gollapudi 1046853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 1047aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 1048aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 1049853e2bd2SBhanu Gollapudi task = &(task_page[index]); 1050853e2bd2SBhanu Gollapudi orig_xid = io_req->xid; 1051853e2bd2SBhanu Gollapudi 1052853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); 1053853e2bd2SBhanu Gollapudi 1054853e2bd2SBhanu Gollapudi bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); 1055853e2bd2SBhanu Gollapudi 1056853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 1057853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 1058853e2bd2SBhanu Gollapudi 1059853e2bd2SBhanu Gollapudi /* Ring doorbell */ 1060853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 1061853e2bd2SBhanu Gollapudi 1062853e2bd2SBhanu Gollapudi cleanup_err: 1063853e2bd2SBhanu Gollapudi return rc; 1064853e2bd2SBhanu Gollapudi } 1065853e2bd2SBhanu Gollapudi 1066853e2bd2SBhanu Gollapudi /** 1067853e2bd2SBhanu Gollapudi * bnx2fc_eh_target_reset: Reset a target 1068853e2bd2SBhanu Gollapudi * 1069853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI command 1070853e2bd2SBhanu Gollapudi * 1071853e2bd2SBhanu Gollapudi * Set from SCSI host template to send task mgmt command to the target 1072853e2bd2SBhanu Gollapudi * and wait for the response 1073853e2bd2SBhanu Gollapudi */ 1074853e2bd2SBhanu Gollapudi int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) 1075853e2bd2SBhanu Gollapudi { 1076853e2bd2SBhanu Gollapudi return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); 1077853e2bd2SBhanu Gollapudi } 1078853e2bd2SBhanu Gollapudi 1079853e2bd2SBhanu Gollapudi /** 1080853e2bd2SBhanu Gollapudi * bnx2fc_eh_device_reset - Reset a single LUN 1081853e2bd2SBhanu Gollapudi * 1082853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI command 1083853e2bd2SBhanu Gollapudi * 1084853e2bd2SBhanu Gollapudi * Set from SCSI host template to send task mgmt command to the target 1085853e2bd2SBhanu Gollapudi * and wait for the response 1086853e2bd2SBhanu Gollapudi */ 1087853e2bd2SBhanu Gollapudi int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) 1088853e2bd2SBhanu Gollapudi { 1089853e2bd2SBhanu Gollapudi return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); 1090853e2bd2SBhanu Gollapudi } 1091853e2bd2SBhanu Gollapudi 1092853e2bd2SBhanu Gollapudi /** 1093853e2bd2SBhanu Gollapudi * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding 1094853e2bd2SBhanu Gollapudi * SCSI command 1095853e2bd2SBhanu Gollapudi * 1096853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI_ML command pointer 1097853e2bd2SBhanu Gollapudi * 1098853e2bd2SBhanu Gollapudi * SCSI abort request handler 1099853e2bd2SBhanu Gollapudi */ 1100853e2bd2SBhanu Gollapudi int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) 1101853e2bd2SBhanu Gollapudi { 1102853e2bd2SBhanu Gollapudi struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1103853e2bd2SBhanu Gollapudi struct fc_rport_libfc_priv *rp = rport->dd_data; 1104853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 1105853e2bd2SBhanu Gollapudi struct fc_lport *lport; 110699cc600cSBhanu Prakash Gollapudi struct fc_rport_priv *rdata; 1107853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt; 110899cc600cSBhanu Prakash Gollapudi int logo_issued; 110999cc600cSBhanu Prakash Gollapudi int wait_cnt = 0; 1110853e2bd2SBhanu Gollapudi int rc = FAILED; 1111853e2bd2SBhanu Gollapudi 1112853e2bd2SBhanu Gollapudi 1113853e2bd2SBhanu Gollapudi rc = fc_block_scsi_eh(sc_cmd); 1114853e2bd2SBhanu Gollapudi if (rc) 1115853e2bd2SBhanu Gollapudi return rc; 1116853e2bd2SBhanu Gollapudi 1117853e2bd2SBhanu Gollapudi lport = shost_priv(sc_cmd->device->host); 1118853e2bd2SBhanu Gollapudi if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1119b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: link not ready\n"); 1120853e2bd2SBhanu Gollapudi return rc; 1121853e2bd2SBhanu Gollapudi } 1122853e2bd2SBhanu Gollapudi 1123853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1]; 1124853e2bd2SBhanu Gollapudi 1125853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); 1126853e2bd2SBhanu Gollapudi 1127853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 1128853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr; 1129853e2bd2SBhanu Gollapudi if (!io_req) { 1130853e2bd2SBhanu Gollapudi /* Command might have just completed */ 1131853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); 1132853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1133853e2bd2SBhanu Gollapudi return SUCCESS; 1134853e2bd2SBhanu Gollapudi } 1135853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", 1136853e2bd2SBhanu Gollapudi io_req->refcount.refcount.counter); 1137853e2bd2SBhanu Gollapudi 1138853e2bd2SBhanu Gollapudi /* Hold IO request across abort processing */ 1139853e2bd2SBhanu Gollapudi kref_get(&io_req->refcount); 1140853e2bd2SBhanu Gollapudi 1141853e2bd2SBhanu Gollapudi BUG_ON(tgt != io_req->tgt); 1142853e2bd2SBhanu Gollapudi 1143853e2bd2SBhanu Gollapudi /* Remove the io_req from the active_q. */ 1144853e2bd2SBhanu Gollapudi /* 1145853e2bd2SBhanu Gollapudi * Task Mgmt functions (LUN RESET & TGT RESET) will not 1146853e2bd2SBhanu Gollapudi * issue an ABTS on this particular IO req, as the 1147853e2bd2SBhanu Gollapudi * io_req is no longer in the active_q. 1148853e2bd2SBhanu Gollapudi */ 1149853e2bd2SBhanu Gollapudi if (tgt->flush_in_prog) { 1150b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1151853e2bd2SBhanu Gollapudi "flush in progress\n", io_req->xid); 1152853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1153853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1154853e2bd2SBhanu Gollapudi return SUCCESS; 1155853e2bd2SBhanu Gollapudi } 1156853e2bd2SBhanu Gollapudi 1157853e2bd2SBhanu Gollapudi if (io_req->on_active_queue == 0) { 1158b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1159853e2bd2SBhanu Gollapudi "not on active_q\n", io_req->xid); 1160853e2bd2SBhanu Gollapudi /* 1161853e2bd2SBhanu Gollapudi * This condition can happen only due to the FW bug, 1162853e2bd2SBhanu Gollapudi * where we do not receive cleanup response from 1163853e2bd2SBhanu Gollapudi * the FW. Handle this case gracefully by erroring 1164853e2bd2SBhanu Gollapudi * back the IO request to SCSI-ml 1165853e2bd2SBhanu Gollapudi */ 1166853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ABORT); 1167853e2bd2SBhanu Gollapudi 1168853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1169853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1170853e2bd2SBhanu Gollapudi return SUCCESS; 1171853e2bd2SBhanu Gollapudi } 1172853e2bd2SBhanu Gollapudi 1173853e2bd2SBhanu Gollapudi /* 1174853e2bd2SBhanu Gollapudi * Only eh_abort processing will remove the IO from 1175853e2bd2SBhanu Gollapudi * active_cmd_q before processing the request. this is 1176853e2bd2SBhanu Gollapudi * done to avoid race conditions between IOs aborted 1177853e2bd2SBhanu Gollapudi * as part of task management completion and eh_abort 1178853e2bd2SBhanu Gollapudi * processing 1179853e2bd2SBhanu Gollapudi */ 1180853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1181853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0; 1182853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */ 1183853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue); 1184853e2bd2SBhanu Gollapudi 1185853e2bd2SBhanu Gollapudi init_completion(&io_req->tm_done); 1186853e2bd2SBhanu Gollapudi io_req->wait_for_comp = 1; 1187853e2bd2SBhanu Gollapudi 1188853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 1189853e2bd2SBhanu Gollapudi /* Cancel the current timer running on this io_req */ 1190853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1191853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1192853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1193853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); 1194853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(io_req); 1195853e2bd2SBhanu Gollapudi } else { 1196b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1197853e2bd2SBhanu Gollapudi "already in abts processing\n", io_req->xid); 119899cc600cSBhanu Prakash Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 119999cc600cSBhanu Prakash Gollapudi kref_put(&io_req->refcount, 120099cc600cSBhanu Prakash Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 120199cc600cSBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req); 120299cc600cSBhanu Prakash Gollapudi 120399cc600cSBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 120499cc600cSBhanu Prakash Gollapudi 120599cc600cSBhanu Prakash Gollapudi wait_for_completion(&io_req->tm_done); 120699cc600cSBhanu Prakash Gollapudi 120799cc600cSBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 120899cc600cSBhanu Prakash Gollapudi io_req->wait_for_comp = 0; 120999cc600cSBhanu Prakash Gollapudi rdata = io_req->tgt->rdata; 121099cc600cSBhanu Prakash Gollapudi logo_issued = test_and_set_bit(BNX2FC_FLAG_EXPL_LOGO, 121199cc600cSBhanu Prakash Gollapudi &tgt->flags); 1212853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1213853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 121499cc600cSBhanu Prakash Gollapudi 121599cc600cSBhanu Prakash Gollapudi if (!logo_issued) { 121699cc600cSBhanu Prakash Gollapudi BNX2FC_IO_DBG(io_req, "Expl logo - tgt flags = 0x%lx\n", 121799cc600cSBhanu Prakash Gollapudi tgt->flags); 121899cc600cSBhanu Prakash Gollapudi mutex_lock(&lport->disc.disc_mutex); 121999cc600cSBhanu Prakash Gollapudi lport->tt.rport_logoff(rdata); 122099cc600cSBhanu Prakash Gollapudi mutex_unlock(&lport->disc.disc_mutex); 122199cc600cSBhanu Prakash Gollapudi do { 122299cc600cSBhanu Prakash Gollapudi msleep(BNX2FC_RELOGIN_WAIT_TIME); 122399cc600cSBhanu Prakash Gollapudi /* 122499cc600cSBhanu Prakash Gollapudi * If session not recovered, let SCSI-ml 122599cc600cSBhanu Prakash Gollapudi * escalate error recovery. 122699cc600cSBhanu Prakash Gollapudi */ 122799cc600cSBhanu Prakash Gollapudi if (wait_cnt++ > BNX2FC_RELOGIN_WAIT_CNT) 122899cc600cSBhanu Prakash Gollapudi return FAILED; 122999cc600cSBhanu Prakash Gollapudi } while (!test_bit(BNX2FC_FLAG_SESSION_READY, 123099cc600cSBhanu Prakash Gollapudi &tgt->flags)); 123199cc600cSBhanu Prakash Gollapudi } 1232853e2bd2SBhanu Gollapudi return SUCCESS; 1233853e2bd2SBhanu Gollapudi } 1234853e2bd2SBhanu Gollapudi if (rc == FAILED) { 1235853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1236853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1237853e2bd2SBhanu Gollapudi return rc; 1238853e2bd2SBhanu Gollapudi } 1239853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1240853e2bd2SBhanu Gollapudi 1241853e2bd2SBhanu Gollapudi wait_for_completion(&io_req->tm_done); 1242853e2bd2SBhanu Gollapudi 1243853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 1244853e2bd2SBhanu Gollapudi io_req->wait_for_comp = 0; 1245853e2bd2SBhanu Gollapudi if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1246853e2bd2SBhanu Gollapudi &io_req->req_flags))) { 1247853e2bd2SBhanu Gollapudi /* Let the scsi-ml try to recover this command */ 1248853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", 1249853e2bd2SBhanu Gollapudi io_req->xid); 1250853e2bd2SBhanu Gollapudi rc = FAILED; 1251853e2bd2SBhanu Gollapudi } else { 1252853e2bd2SBhanu Gollapudi /* 1253853e2bd2SBhanu Gollapudi * We come here even when there was a race condition 1254853e2bd2SBhanu Gollapudi * between timeout and abts completion, and abts 1255853e2bd2SBhanu Gollapudi * completion happens just in time. 1256853e2bd2SBhanu Gollapudi */ 1257853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "abort succeeded\n"); 1258853e2bd2SBhanu Gollapudi rc = SUCCESS; 1259853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ABORT); 1260853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1261853e2bd2SBhanu Gollapudi } 1262853e2bd2SBhanu Gollapudi 1263853e2bd2SBhanu Gollapudi /* release the reference taken in eh_abort */ 1264853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1265853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1266853e2bd2SBhanu Gollapudi return rc; 1267853e2bd2SBhanu Gollapudi } 1268853e2bd2SBhanu Gollapudi 12696c5a7ce4SBhanu Prakash Gollapudi void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req, 12706c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task, 12716c5a7ce4SBhanu Prakash Gollapudi u8 rx_state) 12726c5a7ce4SBhanu Prakash Gollapudi { 12736c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg; 12746c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req; 12756c5a7ce4SBhanu Prakash Gollapudi u32 offset = cb_arg->offset; 12766c5a7ce4SBhanu Prakash Gollapudi enum fc_rctl r_ctl = cb_arg->r_ctl; 12776c5a7ce4SBhanu Prakash Gollapudi int rc = 0; 12786c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = orig_io_req->tgt; 12796c5a7ce4SBhanu Prakash Gollapudi 12806c5a7ce4SBhanu Prakash Gollapudi BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x" 12816c5a7ce4SBhanu Prakash Gollapudi "cmd_type = %d\n", 12826c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->xid, seq_clnp_req->cmd_type); 12836c5a7ce4SBhanu Prakash Gollapudi 12846c5a7ce4SBhanu Prakash Gollapudi if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) { 12856c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n", 12866c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->xid); 12876c5a7ce4SBhanu Prakash Gollapudi goto free_cb_arg; 12886c5a7ce4SBhanu Prakash Gollapudi } 12896c5a7ce4SBhanu Prakash Gollapudi 12906c5a7ce4SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 12916c5a7ce4SBhanu Prakash Gollapudi rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); 12926c5a7ce4SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 12936c5a7ce4SBhanu Prakash Gollapudi 12946c5a7ce4SBhanu Prakash Gollapudi if (rc) 12956c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "clnup_compl: Unable to send SRR" 12966c5a7ce4SBhanu Prakash Gollapudi " IO will abort\n"); 12976c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->cb_arg = NULL; 12986c5a7ce4SBhanu Prakash Gollapudi kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); 12996c5a7ce4SBhanu Prakash Gollapudi free_cb_arg: 13006c5a7ce4SBhanu Prakash Gollapudi kfree(cb_arg); 13016c5a7ce4SBhanu Prakash Gollapudi return; 13026c5a7ce4SBhanu Prakash Gollapudi } 13036c5a7ce4SBhanu Prakash Gollapudi 1304853e2bd2SBhanu Gollapudi void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, 1305853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, 1306853e2bd2SBhanu Gollapudi u8 num_rq) 1307853e2bd2SBhanu Gollapudi { 1308853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " 1309853e2bd2SBhanu Gollapudi "refcnt = %d, cmd_type = %d\n", 1310853e2bd2SBhanu Gollapudi io_req->refcount.refcount.counter, io_req->cmd_type); 1311853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ERROR); 1312853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 131399cc600cSBhanu Prakash Gollapudi if (io_req->wait_for_comp) 131499cc600cSBhanu Prakash Gollapudi complete(&io_req->tm_done); 1315853e2bd2SBhanu Gollapudi } 1316853e2bd2SBhanu Gollapudi 1317853e2bd2SBhanu Gollapudi void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, 1318853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, 1319853e2bd2SBhanu Gollapudi u8 num_rq) 1320853e2bd2SBhanu Gollapudi { 1321853e2bd2SBhanu Gollapudi u32 r_ctl; 1322853e2bd2SBhanu Gollapudi u32 r_a_tov = FC_DEF_R_A_TOV; 1323853e2bd2SBhanu Gollapudi u8 issue_rrq = 0; 1324853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1325853e2bd2SBhanu Gollapudi 1326853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" 1327853e2bd2SBhanu Gollapudi "refcnt = %d, cmd_type = %d\n", 1328853e2bd2SBhanu Gollapudi io_req->xid, 1329853e2bd2SBhanu Gollapudi io_req->refcount.refcount.counter, io_req->cmd_type); 1330853e2bd2SBhanu Gollapudi 1331853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1332853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 1333853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Timer context finished processing" 1334853e2bd2SBhanu Gollapudi " this io\n"); 1335853e2bd2SBhanu Gollapudi return; 1336853e2bd2SBhanu Gollapudi } 1337853e2bd2SBhanu Gollapudi 1338853e2bd2SBhanu Gollapudi /* Do not issue RRQ as this IO is already cleanedup */ 1339853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, 1340853e2bd2SBhanu Gollapudi &io_req->req_flags)) 1341853e2bd2SBhanu Gollapudi goto io_compl; 1342853e2bd2SBhanu Gollapudi 1343853e2bd2SBhanu Gollapudi /* 1344853e2bd2SBhanu Gollapudi * For ABTS issued due to SCSI eh_abort_handler, timeout 1345853e2bd2SBhanu Gollapudi * values are maintained by scsi-ml itself. Cancel timeout 1346853e2bd2SBhanu Gollapudi * in case ABTS issued as part of task management function 1347853e2bd2SBhanu Gollapudi * or due to FW error. 1348853e2bd2SBhanu Gollapudi */ 1349853e2bd2SBhanu Gollapudi if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) 1350853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1351853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1352853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1353853e2bd2SBhanu Gollapudi 1354619c5cb6SVlad Zolotarov r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl; 1355853e2bd2SBhanu Gollapudi 1356853e2bd2SBhanu Gollapudi switch (r_ctl) { 1357853e2bd2SBhanu Gollapudi case FC_RCTL_BA_ACC: 1358853e2bd2SBhanu Gollapudi /* 1359853e2bd2SBhanu Gollapudi * Dont release this cmd yet. It will be relesed 1360853e2bd2SBhanu Gollapudi * after we get RRQ response 1361853e2bd2SBhanu Gollapudi */ 1362853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); 1363853e2bd2SBhanu Gollapudi issue_rrq = 1; 1364853e2bd2SBhanu Gollapudi break; 1365853e2bd2SBhanu Gollapudi 1366853e2bd2SBhanu Gollapudi case FC_RCTL_BA_RJT: 1367853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); 1368853e2bd2SBhanu Gollapudi break; 1369853e2bd2SBhanu Gollapudi default: 1370853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Unknown ABTS response\n"); 1371853e2bd2SBhanu Gollapudi break; 1372853e2bd2SBhanu Gollapudi } 1373853e2bd2SBhanu Gollapudi 1374853e2bd2SBhanu Gollapudi if (issue_rrq) { 1375853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); 1376853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); 1377853e2bd2SBhanu Gollapudi } 1378853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 1379853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, r_a_tov); 1380853e2bd2SBhanu Gollapudi 1381853e2bd2SBhanu Gollapudi io_compl: 1382853e2bd2SBhanu Gollapudi if (io_req->wait_for_comp) { 1383853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1384853e2bd2SBhanu Gollapudi &io_req->req_flags)) 1385853e2bd2SBhanu Gollapudi complete(&io_req->tm_done); 1386853e2bd2SBhanu Gollapudi } else { 1387853e2bd2SBhanu Gollapudi /* 1388853e2bd2SBhanu Gollapudi * We end up here when ABTS is issued as 1389853e2bd2SBhanu Gollapudi * in asynchronous context, i.e., as part 1390853e2bd2SBhanu Gollapudi * of task management completion, or 1391853e2bd2SBhanu Gollapudi * when FW error is received or when the 1392853e2bd2SBhanu Gollapudi * ABTS is issued when the IO is timed 1393853e2bd2SBhanu Gollapudi * out. 1394853e2bd2SBhanu Gollapudi */ 1395853e2bd2SBhanu Gollapudi 1396853e2bd2SBhanu Gollapudi if (io_req->on_active_queue) { 1397853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1398853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0; 1399853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */ 1400853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue); 1401853e2bd2SBhanu Gollapudi } 1402853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ERROR); 1403853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1404853e2bd2SBhanu Gollapudi } 1405853e2bd2SBhanu Gollapudi } 1406853e2bd2SBhanu Gollapudi 1407853e2bd2SBhanu Gollapudi static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) 1408853e2bd2SBhanu Gollapudi { 1409853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1410853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1411853e2bd2SBhanu Gollapudi struct list_head *list; 1412853e2bd2SBhanu Gollapudi struct list_head *tmp; 1413853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *cmd; 1414853e2bd2SBhanu Gollapudi int tm_lun = sc_cmd->device->lun; 1415853e2bd2SBhanu Gollapudi int rc = 0; 1416853e2bd2SBhanu Gollapudi int lun; 1417853e2bd2SBhanu Gollapudi 1418853e2bd2SBhanu Gollapudi /* called with tgt_lock held */ 1419853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n"); 1420853e2bd2SBhanu Gollapudi /* 1421853e2bd2SBhanu Gollapudi * Walk thru the active_ios queue and ABORT the IO 1422853e2bd2SBhanu Gollapudi * that matches with the LUN that was reset 1423853e2bd2SBhanu Gollapudi */ 1424853e2bd2SBhanu Gollapudi list_for_each_safe(list, tmp, &tgt->active_cmd_queue) { 1425853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n"); 1426853e2bd2SBhanu Gollapudi cmd = (struct bnx2fc_cmd *)list; 1427853e2bd2SBhanu Gollapudi lun = cmd->sc_cmd->device->lun; 1428853e2bd2SBhanu Gollapudi if (lun == tm_lun) { 1429853e2bd2SBhanu Gollapudi /* Initiate ABTS on this cmd */ 1430853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1431853e2bd2SBhanu Gollapudi &cmd->req_flags)) { 1432853e2bd2SBhanu Gollapudi /* cancel the IO timeout */ 1433853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1434853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1435853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); 1436853e2bd2SBhanu Gollapudi /* timer hold */ 1437853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(cmd); 143825985edcSLucas De Marchi /* abts shouldn't fail in this context */ 1439853e2bd2SBhanu Gollapudi WARN_ON(rc != SUCCESS); 1440853e2bd2SBhanu Gollapudi } else 1441853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "lun_rst: abts already in" 1442853e2bd2SBhanu Gollapudi " progress for this IO 0x%x\n", 1443853e2bd2SBhanu Gollapudi cmd->xid); 1444853e2bd2SBhanu Gollapudi } 1445853e2bd2SBhanu Gollapudi } 1446853e2bd2SBhanu Gollapudi } 1447853e2bd2SBhanu Gollapudi 1448853e2bd2SBhanu Gollapudi static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) 1449853e2bd2SBhanu Gollapudi { 1450853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1451853e2bd2SBhanu Gollapudi struct list_head *list; 1452853e2bd2SBhanu Gollapudi struct list_head *tmp; 1453853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *cmd; 1454853e2bd2SBhanu Gollapudi int rc = 0; 1455853e2bd2SBhanu Gollapudi 1456853e2bd2SBhanu Gollapudi /* called with tgt_lock held */ 1457853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); 1458853e2bd2SBhanu Gollapudi /* 1459853e2bd2SBhanu Gollapudi * Walk thru the active_ios queue and ABORT the IO 1460853e2bd2SBhanu Gollapudi * that matches with the LUN that was reset 1461853e2bd2SBhanu Gollapudi */ 1462853e2bd2SBhanu Gollapudi list_for_each_safe(list, tmp, &tgt->active_cmd_queue) { 1463853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); 1464853e2bd2SBhanu Gollapudi cmd = (struct bnx2fc_cmd *)list; 1465853e2bd2SBhanu Gollapudi /* Initiate ABTS */ 1466853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1467853e2bd2SBhanu Gollapudi &cmd->req_flags)) { 1468853e2bd2SBhanu Gollapudi /* cancel the IO timeout */ 1469853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1470853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1471853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* timer hold */ 1472853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(cmd); 147325985edcSLucas De Marchi /* abts shouldn't fail in this context */ 1474853e2bd2SBhanu Gollapudi WARN_ON(rc != SUCCESS); 1475853e2bd2SBhanu Gollapudi 1476853e2bd2SBhanu Gollapudi } else 1477853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tgt_rst: abts already in progress" 1478853e2bd2SBhanu Gollapudi " for this IO 0x%x\n", cmd->xid); 1479853e2bd2SBhanu Gollapudi } 1480853e2bd2SBhanu Gollapudi } 1481853e2bd2SBhanu Gollapudi 1482853e2bd2SBhanu Gollapudi void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, 1483853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, u8 num_rq) 1484853e2bd2SBhanu Gollapudi { 1485853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *tm_req; 1486853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr; 1487853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1488853e2bd2SBhanu Gollapudi u64 *hdr; 1489853e2bd2SBhanu Gollapudi u64 *temp_hdr; 1490853e2bd2SBhanu Gollapudi void *rsp_buf; 1491853e2bd2SBhanu Gollapudi 1492853e2bd2SBhanu Gollapudi /* Called with tgt_lock held */ 1493853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); 1494853e2bd2SBhanu Gollapudi 1495853e2bd2SBhanu Gollapudi if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) 1496853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); 1497853e2bd2SBhanu Gollapudi else { 1498853e2bd2SBhanu Gollapudi /* TM has already timed out and we got 1499853e2bd2SBhanu Gollapudi * delayed completion. Ignore completion 1500853e2bd2SBhanu Gollapudi * processing. 1501853e2bd2SBhanu Gollapudi */ 1502853e2bd2SBhanu Gollapudi return; 1503853e2bd2SBhanu Gollapudi } 1504853e2bd2SBhanu Gollapudi 1505853e2bd2SBhanu Gollapudi tm_req = &(io_req->mp_req); 1506853e2bd2SBhanu Gollapudi fc_hdr = &(tm_req->resp_fc_hdr); 1507853e2bd2SBhanu Gollapudi hdr = (u64 *)fc_hdr; 1508853e2bd2SBhanu Gollapudi temp_hdr = (u64 *) 1509619c5cb6SVlad Zolotarov &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; 1510853e2bd2SBhanu Gollapudi hdr[0] = cpu_to_be64(temp_hdr[0]); 1511853e2bd2SBhanu Gollapudi hdr[1] = cpu_to_be64(temp_hdr[1]); 1512853e2bd2SBhanu Gollapudi hdr[2] = cpu_to_be64(temp_hdr[2]); 1513853e2bd2SBhanu Gollapudi 1514619c5cb6SVlad Zolotarov tm_req->resp_len = 1515619c5cb6SVlad Zolotarov task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; 1516853e2bd2SBhanu Gollapudi 1517853e2bd2SBhanu Gollapudi rsp_buf = tm_req->resp_buf; 1518853e2bd2SBhanu Gollapudi 1519853e2bd2SBhanu Gollapudi if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { 1520853e2bd2SBhanu Gollapudi bnx2fc_parse_fcp_rsp(io_req, 1521853e2bd2SBhanu Gollapudi (struct fcoe_fcp_rsp_payload *) 1522853e2bd2SBhanu Gollapudi rsp_buf, num_rq); 1523853e2bd2SBhanu Gollapudi if (io_req->fcp_rsp_code == 0) { 1524853e2bd2SBhanu Gollapudi /* TM successful */ 1525853e2bd2SBhanu Gollapudi if (tm_req->tm_flags & FCP_TMF_LUN_RESET) 1526853e2bd2SBhanu Gollapudi bnx2fc_lun_reset_cmpl(io_req); 1527853e2bd2SBhanu Gollapudi else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) 1528853e2bd2SBhanu Gollapudi bnx2fc_tgt_reset_cmpl(io_req); 1529853e2bd2SBhanu Gollapudi } 1530853e2bd2SBhanu Gollapudi } else { 1531853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", 1532853e2bd2SBhanu Gollapudi fc_hdr->fh_r_ctl); 1533853e2bd2SBhanu Gollapudi } 1534853e2bd2SBhanu Gollapudi if (!sc_cmd->SCp.ptr) { 1535b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n"); 1536853e2bd2SBhanu Gollapudi return; 1537853e2bd2SBhanu Gollapudi } 1538853e2bd2SBhanu Gollapudi switch (io_req->fcp_status) { 1539853e2bd2SBhanu Gollapudi case FC_GOOD: 1540853e2bd2SBhanu Gollapudi if (io_req->cdb_status == 0) { 1541853e2bd2SBhanu Gollapudi /* Good IO completion */ 1542853e2bd2SBhanu Gollapudi sc_cmd->result = DID_OK << 16; 1543853e2bd2SBhanu Gollapudi } else { 1544853e2bd2SBhanu Gollapudi /* Transport status is good, SCSI status not good */ 1545853e2bd2SBhanu Gollapudi sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1546853e2bd2SBhanu Gollapudi } 1547853e2bd2SBhanu Gollapudi if (io_req->fcp_resid) 1548853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, io_req->fcp_resid); 1549853e2bd2SBhanu Gollapudi break; 1550853e2bd2SBhanu Gollapudi 1551853e2bd2SBhanu Gollapudi default: 1552853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", 1553853e2bd2SBhanu Gollapudi io_req->fcp_status); 1554853e2bd2SBhanu Gollapudi break; 1555853e2bd2SBhanu Gollapudi } 1556853e2bd2SBhanu Gollapudi 1557853e2bd2SBhanu Gollapudi sc_cmd = io_req->sc_cmd; 1558853e2bd2SBhanu Gollapudi io_req->sc_cmd = NULL; 1559853e2bd2SBhanu Gollapudi 1560853e2bd2SBhanu Gollapudi /* check if the io_req exists in tgt's tmf_q */ 1561853e2bd2SBhanu Gollapudi if (io_req->on_tmf_queue) { 1562853e2bd2SBhanu Gollapudi 1563853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1564853e2bd2SBhanu Gollapudi io_req->on_tmf_queue = 0; 1565853e2bd2SBhanu Gollapudi } else { 1566853e2bd2SBhanu Gollapudi 1567b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "Command not on active_cmd_queue!\n"); 1568853e2bd2SBhanu Gollapudi return; 1569853e2bd2SBhanu Gollapudi } 1570853e2bd2SBhanu Gollapudi 1571853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = NULL; 1572853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 1573853e2bd2SBhanu Gollapudi 1574853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1575853e2bd2SBhanu Gollapudi if (io_req->wait_for_comp) { 1576853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); 1577853e2bd2SBhanu Gollapudi complete(&io_req->tm_done); 1578853e2bd2SBhanu Gollapudi } 1579853e2bd2SBhanu Gollapudi } 1580853e2bd2SBhanu Gollapudi 1581853e2bd2SBhanu Gollapudi static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 1582853e2bd2SBhanu Gollapudi int bd_index) 1583853e2bd2SBhanu Gollapudi { 1584853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1585853e2bd2SBhanu Gollapudi int frag_size, sg_frags; 1586853e2bd2SBhanu Gollapudi 1587853e2bd2SBhanu Gollapudi sg_frags = 0; 1588853e2bd2SBhanu Gollapudi while (sg_len) { 1589853e2bd2SBhanu Gollapudi if (sg_len >= BNX2FC_BD_SPLIT_SZ) 1590853e2bd2SBhanu Gollapudi frag_size = BNX2FC_BD_SPLIT_SZ; 1591853e2bd2SBhanu Gollapudi else 1592853e2bd2SBhanu Gollapudi frag_size = sg_len; 1593853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; 1594853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; 1595853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_len = (u16)frag_size; 1596853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].flags = 0; 1597853e2bd2SBhanu Gollapudi 1598853e2bd2SBhanu Gollapudi addr += (u64) frag_size; 1599853e2bd2SBhanu Gollapudi sg_frags++; 1600853e2bd2SBhanu Gollapudi sg_len -= frag_size; 1601853e2bd2SBhanu Gollapudi } 1602853e2bd2SBhanu Gollapudi return sg_frags; 1603853e2bd2SBhanu Gollapudi 1604853e2bd2SBhanu Gollapudi } 1605853e2bd2SBhanu Gollapudi 1606853e2bd2SBhanu Gollapudi static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) 1607853e2bd2SBhanu Gollapudi { 16083ce41ea1SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 16093ce41ea1SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 1610853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd; 1611853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1612853e2bd2SBhanu Gollapudi struct scatterlist *sg; 1613853e2bd2SBhanu Gollapudi int byte_count = 0; 1614853e2bd2SBhanu Gollapudi int sg_count = 0; 1615853e2bd2SBhanu Gollapudi int bd_count = 0; 1616853e2bd2SBhanu Gollapudi int sg_frags; 1617853e2bd2SBhanu Gollapudi unsigned int sg_len; 1618853e2bd2SBhanu Gollapudi u64 addr; 1619853e2bd2SBhanu Gollapudi int i; 1620853e2bd2SBhanu Gollapudi 16213ce41ea1SBhanu Prakash Gollapudi sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc), 16223ce41ea1SBhanu Prakash Gollapudi scsi_sg_count(sc), sc->sc_data_direction); 1623853e2bd2SBhanu Gollapudi scsi_for_each_sg(sc, sg, sg_count, i) { 1624853e2bd2SBhanu Gollapudi sg_len = sg_dma_len(sg); 1625853e2bd2SBhanu Gollapudi addr = sg_dma_address(sg); 1626853e2bd2SBhanu Gollapudi if (sg_len > BNX2FC_MAX_BD_LEN) { 1627853e2bd2SBhanu Gollapudi sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, 1628853e2bd2SBhanu Gollapudi bd_count); 1629853e2bd2SBhanu Gollapudi } else { 1630853e2bd2SBhanu Gollapudi 1631853e2bd2SBhanu Gollapudi sg_frags = 1; 1632853e2bd2SBhanu Gollapudi bd[bd_count].buf_addr_lo = addr & 0xffffffff; 1633853e2bd2SBhanu Gollapudi bd[bd_count].buf_addr_hi = addr >> 32; 1634853e2bd2SBhanu Gollapudi bd[bd_count].buf_len = (u16)sg_len; 1635853e2bd2SBhanu Gollapudi bd[bd_count].flags = 0; 1636853e2bd2SBhanu Gollapudi } 1637853e2bd2SBhanu Gollapudi bd_count += sg_frags; 1638853e2bd2SBhanu Gollapudi byte_count += sg_len; 1639853e2bd2SBhanu Gollapudi } 1640853e2bd2SBhanu Gollapudi if (byte_count != scsi_bufflen(sc)) 1641853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " 1642853e2bd2SBhanu Gollapudi "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), 1643853e2bd2SBhanu Gollapudi io_req->xid); 1644853e2bd2SBhanu Gollapudi return bd_count; 1645853e2bd2SBhanu Gollapudi } 1646853e2bd2SBhanu Gollapudi 1647822f2903SBhanu Prakash Gollapudi static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) 1648853e2bd2SBhanu Gollapudi { 1649853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd; 1650853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1651853e2bd2SBhanu Gollapudi int bd_count; 1652853e2bd2SBhanu Gollapudi 1653822f2903SBhanu Prakash Gollapudi if (scsi_sg_count(sc)) { 1654853e2bd2SBhanu Gollapudi bd_count = bnx2fc_map_sg(io_req); 1655822f2903SBhanu Prakash Gollapudi if (bd_count == 0) 1656822f2903SBhanu Prakash Gollapudi return -ENOMEM; 1657822f2903SBhanu Prakash Gollapudi } else { 1658853e2bd2SBhanu Gollapudi bd_count = 0; 1659853e2bd2SBhanu Gollapudi bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; 1660853e2bd2SBhanu Gollapudi bd[0].buf_len = bd[0].flags = 0; 1661853e2bd2SBhanu Gollapudi } 1662853e2bd2SBhanu Gollapudi io_req->bd_tbl->bd_valid = bd_count; 1663822f2903SBhanu Prakash Gollapudi 1664822f2903SBhanu Prakash Gollapudi return 0; 1665853e2bd2SBhanu Gollapudi } 1666853e2bd2SBhanu Gollapudi 1667853e2bd2SBhanu Gollapudi static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) 1668853e2bd2SBhanu Gollapudi { 1669853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd; 1670853e2bd2SBhanu Gollapudi 1671853e2bd2SBhanu Gollapudi if (io_req->bd_tbl->bd_valid && sc) { 1672853e2bd2SBhanu Gollapudi scsi_dma_unmap(sc); 1673853e2bd2SBhanu Gollapudi io_req->bd_tbl->bd_valid = 0; 1674853e2bd2SBhanu Gollapudi } 1675853e2bd2SBhanu Gollapudi } 1676853e2bd2SBhanu Gollapudi 1677853e2bd2SBhanu Gollapudi void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, 1678853e2bd2SBhanu Gollapudi struct fcp_cmnd *fcp_cmnd) 1679853e2bd2SBhanu Gollapudi { 1680853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1681853e2bd2SBhanu Gollapudi char tag[2]; 1682853e2bd2SBhanu Gollapudi 1683853e2bd2SBhanu Gollapudi memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 1684853e2bd2SBhanu Gollapudi 1685e35fa8c2SAndy Grover int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun); 1686853e2bd2SBhanu Gollapudi 1687853e2bd2SBhanu Gollapudi fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); 1688853e2bd2SBhanu Gollapudi memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); 1689853e2bd2SBhanu Gollapudi 1690853e2bd2SBhanu Gollapudi fcp_cmnd->fc_cmdref = 0; 1691853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = 0; 1692853e2bd2SBhanu Gollapudi fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; 1693853e2bd2SBhanu Gollapudi fcp_cmnd->fc_flags = io_req->io_req_flags; 1694853e2bd2SBhanu Gollapudi 1695853e2bd2SBhanu Gollapudi if (scsi_populate_tag_msg(sc_cmd, tag)) { 1696853e2bd2SBhanu Gollapudi switch (tag[0]) { 1697853e2bd2SBhanu Gollapudi case HEAD_OF_QUEUE_TAG: 1698853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = FCP_PTA_HEADQ; 1699853e2bd2SBhanu Gollapudi break; 1700853e2bd2SBhanu Gollapudi case ORDERED_QUEUE_TAG: 1701853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = FCP_PTA_ORDERED; 1702853e2bd2SBhanu Gollapudi break; 1703853e2bd2SBhanu Gollapudi default: 1704853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; 1705853e2bd2SBhanu Gollapudi break; 1706853e2bd2SBhanu Gollapudi } 1707853e2bd2SBhanu Gollapudi } else { 1708853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = 0; 1709853e2bd2SBhanu Gollapudi } 1710853e2bd2SBhanu Gollapudi } 1711853e2bd2SBhanu Gollapudi 1712853e2bd2SBhanu Gollapudi static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, 1713853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp, 1714853e2bd2SBhanu Gollapudi u8 num_rq) 1715853e2bd2SBhanu Gollapudi { 1716853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1717853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1718853e2bd2SBhanu Gollapudi u8 rsp_flags = fcp_rsp->fcp_flags.flags; 1719853e2bd2SBhanu Gollapudi u32 rq_buff_len = 0; 1720853e2bd2SBhanu Gollapudi int i; 1721853e2bd2SBhanu Gollapudi unsigned char *rq_data; 1722853e2bd2SBhanu Gollapudi unsigned char *dummy; 1723853e2bd2SBhanu Gollapudi int fcp_sns_len = 0; 1724853e2bd2SBhanu Gollapudi int fcp_rsp_len = 0; 1725853e2bd2SBhanu Gollapudi 1726853e2bd2SBhanu Gollapudi io_req->fcp_status = FC_GOOD; 1727853e2bd2SBhanu Gollapudi io_req->fcp_resid = fcp_rsp->fcp_resid; 1728853e2bd2SBhanu Gollapudi 1729853e2bd2SBhanu Gollapudi io_req->scsi_comp_flags = rsp_flags; 1730853e2bd2SBhanu Gollapudi CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = 1731853e2bd2SBhanu Gollapudi fcp_rsp->scsi_status_code; 1732853e2bd2SBhanu Gollapudi 1733853e2bd2SBhanu Gollapudi /* Fetch fcp_rsp_info and fcp_sns_info if available */ 1734853e2bd2SBhanu Gollapudi if (num_rq) { 1735853e2bd2SBhanu Gollapudi 1736853e2bd2SBhanu Gollapudi /* 1737853e2bd2SBhanu Gollapudi * We do not anticipate num_rq >1, as the linux defined 1738853e2bd2SBhanu Gollapudi * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO 1739853e2bd2SBhanu Gollapudi * 256 bytes of single rq buffer is good enough to hold this. 1740853e2bd2SBhanu Gollapudi */ 1741853e2bd2SBhanu Gollapudi 1742853e2bd2SBhanu Gollapudi if (rsp_flags & 1743853e2bd2SBhanu Gollapudi FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { 1744853e2bd2SBhanu Gollapudi fcp_rsp_len = rq_buff_len 1745853e2bd2SBhanu Gollapudi = fcp_rsp->fcp_rsp_len; 1746853e2bd2SBhanu Gollapudi } 1747853e2bd2SBhanu Gollapudi 1748853e2bd2SBhanu Gollapudi if (rsp_flags & 1749853e2bd2SBhanu Gollapudi FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { 1750853e2bd2SBhanu Gollapudi fcp_sns_len = fcp_rsp->fcp_sns_len; 1751853e2bd2SBhanu Gollapudi rq_buff_len += fcp_rsp->fcp_sns_len; 1752853e2bd2SBhanu Gollapudi } 1753853e2bd2SBhanu Gollapudi 1754853e2bd2SBhanu Gollapudi io_req->fcp_rsp_len = fcp_rsp_len; 1755853e2bd2SBhanu Gollapudi io_req->fcp_sns_len = fcp_sns_len; 1756853e2bd2SBhanu Gollapudi 1757853e2bd2SBhanu Gollapudi if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { 1758853e2bd2SBhanu Gollapudi /* Invalid sense sense length. */ 1759b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "invalid sns length %d\n", 1760853e2bd2SBhanu Gollapudi rq_buff_len); 1761853e2bd2SBhanu Gollapudi /* reset rq_buff_len */ 1762853e2bd2SBhanu Gollapudi rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; 1763853e2bd2SBhanu Gollapudi } 1764853e2bd2SBhanu Gollapudi 1765853e2bd2SBhanu Gollapudi rq_data = bnx2fc_get_next_rqe(tgt, 1); 1766853e2bd2SBhanu Gollapudi 1767853e2bd2SBhanu Gollapudi if (num_rq > 1) { 1768853e2bd2SBhanu Gollapudi /* We do not need extra sense data */ 1769853e2bd2SBhanu Gollapudi for (i = 1; i < num_rq; i++) 1770853e2bd2SBhanu Gollapudi dummy = bnx2fc_get_next_rqe(tgt, 1); 1771853e2bd2SBhanu Gollapudi } 1772853e2bd2SBhanu Gollapudi 1773853e2bd2SBhanu Gollapudi /* fetch fcp_rsp_code */ 1774853e2bd2SBhanu Gollapudi if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1775853e2bd2SBhanu Gollapudi /* Only for task management function */ 1776853e2bd2SBhanu Gollapudi io_req->fcp_rsp_code = rq_data[3]; 1777853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "fcp_rsp_code = %d\n", 1778853e2bd2SBhanu Gollapudi io_req->fcp_rsp_code); 1779853e2bd2SBhanu Gollapudi } 1780853e2bd2SBhanu Gollapudi 1781853e2bd2SBhanu Gollapudi /* fetch sense data */ 1782853e2bd2SBhanu Gollapudi rq_data += fcp_rsp_len; 1783853e2bd2SBhanu Gollapudi 1784853e2bd2SBhanu Gollapudi if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1785853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Truncating sense buffer\n"); 1786853e2bd2SBhanu Gollapudi fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1787853e2bd2SBhanu Gollapudi } 1788853e2bd2SBhanu Gollapudi 1789853e2bd2SBhanu Gollapudi memset(sc_cmd->sense_buffer, 0, sizeof(sc_cmd->sense_buffer)); 1790853e2bd2SBhanu Gollapudi if (fcp_sns_len) 1791853e2bd2SBhanu Gollapudi memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); 1792853e2bd2SBhanu Gollapudi 1793853e2bd2SBhanu Gollapudi /* return RQ entries */ 1794853e2bd2SBhanu Gollapudi for (i = 0; i < num_rq; i++) 1795853e2bd2SBhanu Gollapudi bnx2fc_return_rqe(tgt, 1); 1796853e2bd2SBhanu Gollapudi } 1797853e2bd2SBhanu Gollapudi } 1798853e2bd2SBhanu Gollapudi 1799853e2bd2SBhanu Gollapudi /** 1800853e2bd2SBhanu Gollapudi * bnx2fc_queuecommand - Queuecommand function of the scsi template 1801853e2bd2SBhanu Gollapudi * 1802853e2bd2SBhanu Gollapudi * @host: The Scsi_Host the command was issued to 1803853e2bd2SBhanu Gollapudi * @sc_cmd: struct scsi_cmnd to be executed 1804853e2bd2SBhanu Gollapudi * 1805853e2bd2SBhanu Gollapudi * This is the IO strategy routine, called by SCSI-ML 1806853e2bd2SBhanu Gollapudi **/ 1807853e2bd2SBhanu Gollapudi int bnx2fc_queuecommand(struct Scsi_Host *host, 1808853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd) 1809853e2bd2SBhanu Gollapudi { 1810853e2bd2SBhanu Gollapudi struct fc_lport *lport = shost_priv(host); 1811853e2bd2SBhanu Gollapudi struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1812853e2bd2SBhanu Gollapudi struct fc_rport_libfc_priv *rp = rport->dd_data; 1813853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt; 1814853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 1815853e2bd2SBhanu Gollapudi int rc = 0; 1816853e2bd2SBhanu Gollapudi int rval; 1817853e2bd2SBhanu Gollapudi 1818853e2bd2SBhanu Gollapudi rval = fc_remote_port_chkready(rport); 1819853e2bd2SBhanu Gollapudi if (rval) { 1820853e2bd2SBhanu Gollapudi sc_cmd->result = rval; 1821853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 1822853e2bd2SBhanu Gollapudi return 0; 1823853e2bd2SBhanu Gollapudi } 1824853e2bd2SBhanu Gollapudi 1825853e2bd2SBhanu Gollapudi if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1826853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY; 1827853e2bd2SBhanu Gollapudi goto exit_qcmd; 1828853e2bd2SBhanu Gollapudi } 1829853e2bd2SBhanu Gollapudi 1830853e2bd2SBhanu Gollapudi /* rport and tgt are allocated together, so tgt should be non-NULL */ 1831853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1]; 1832853e2bd2SBhanu Gollapudi 1833853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 1834853e2bd2SBhanu Gollapudi /* 1835853e2bd2SBhanu Gollapudi * Session is not offloaded yet. Let SCSI-ml retry 1836853e2bd2SBhanu Gollapudi * the command. 1837853e2bd2SBhanu Gollapudi */ 1838853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_TARGET_BUSY; 1839853e2bd2SBhanu Gollapudi goto exit_qcmd; 1840853e2bd2SBhanu Gollapudi } 1841853e2bd2SBhanu Gollapudi 1842853e2bd2SBhanu Gollapudi io_req = bnx2fc_cmd_alloc(tgt); 1843853e2bd2SBhanu Gollapudi if (!io_req) { 1844853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY; 1845853e2bd2SBhanu Gollapudi goto exit_qcmd; 1846853e2bd2SBhanu Gollapudi } 1847853e2bd2SBhanu Gollapudi io_req->sc_cmd = sc_cmd; 1848853e2bd2SBhanu Gollapudi 1849853e2bd2SBhanu Gollapudi if (bnx2fc_post_io_req(tgt, io_req)) { 1850853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Unable to post io_req\n"); 1851853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY; 1852853e2bd2SBhanu Gollapudi goto exit_qcmd; 1853853e2bd2SBhanu Gollapudi } 1854853e2bd2SBhanu Gollapudi exit_qcmd: 1855853e2bd2SBhanu Gollapudi return rc; 1856853e2bd2SBhanu Gollapudi } 1857853e2bd2SBhanu Gollapudi 1858853e2bd2SBhanu Gollapudi void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, 1859853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, 1860853e2bd2SBhanu Gollapudi u8 num_rq) 1861853e2bd2SBhanu Gollapudi { 1862853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp; 1863853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1864853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd; 1865853e2bd2SBhanu Gollapudi struct Scsi_Host *host; 1866853e2bd2SBhanu Gollapudi 1867853e2bd2SBhanu Gollapudi 1868853e2bd2SBhanu Gollapudi /* scsi_cmd_cmpl is called with tgt lock held */ 1869853e2bd2SBhanu Gollapudi 1870853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 1871853e2bd2SBhanu Gollapudi /* we will not receive ABTS response for this IO */ 1872853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Timer context finished processing " 1873853e2bd2SBhanu Gollapudi "this scsi cmd\n"); 1874853e2bd2SBhanu Gollapudi } 1875853e2bd2SBhanu Gollapudi 1876853e2bd2SBhanu Gollapudi /* Cancel the timeout_work, as we received IO completion */ 1877853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1878853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1879853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1880853e2bd2SBhanu Gollapudi 1881853e2bd2SBhanu Gollapudi sc_cmd = io_req->sc_cmd; 1882853e2bd2SBhanu Gollapudi if (sc_cmd == NULL) { 1883853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n"); 1884853e2bd2SBhanu Gollapudi return; 1885853e2bd2SBhanu Gollapudi } 1886853e2bd2SBhanu Gollapudi 1887853e2bd2SBhanu Gollapudi /* Fetch fcp_rsp from task context and perform cmd completion */ 1888853e2bd2SBhanu Gollapudi fcp_rsp = (struct fcoe_fcp_rsp_payload *) 1889619c5cb6SVlad Zolotarov &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload); 1890853e2bd2SBhanu Gollapudi 1891853e2bd2SBhanu Gollapudi /* parse fcp_rsp and obtain sense data from RQ if available */ 1892853e2bd2SBhanu Gollapudi bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq); 1893853e2bd2SBhanu Gollapudi 1894853e2bd2SBhanu Gollapudi host = sc_cmd->device->host; 1895853e2bd2SBhanu Gollapudi if (!sc_cmd->SCp.ptr) { 1896853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "SCp.ptr is NULL\n"); 1897853e2bd2SBhanu Gollapudi return; 1898853e2bd2SBhanu Gollapudi } 1899853e2bd2SBhanu Gollapudi 1900853e2bd2SBhanu Gollapudi if (io_req->on_active_queue) { 1901853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1902853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0; 1903853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */ 1904853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue); 1905853e2bd2SBhanu Gollapudi } else { 1906853e2bd2SBhanu Gollapudi /* This should not happen, but could have been pulled 1907853e2bd2SBhanu Gollapudi * by bnx2fc_flush_active_ios(), or during a race 1908853e2bd2SBhanu Gollapudi * between command abort and (late) completion. 1909853e2bd2SBhanu Gollapudi */ 1910853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n"); 1911853e2bd2SBhanu Gollapudi if (io_req->wait_for_comp) 1912853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1913853e2bd2SBhanu Gollapudi &io_req->req_flags)) 1914853e2bd2SBhanu Gollapudi complete(&io_req->tm_done); 1915853e2bd2SBhanu Gollapudi } 1916853e2bd2SBhanu Gollapudi 1917853e2bd2SBhanu Gollapudi bnx2fc_unmap_sg_list(io_req); 1918b5a95fe7SBhanu Prakash Gollapudi io_req->sc_cmd = NULL; 1919853e2bd2SBhanu Gollapudi 1920853e2bd2SBhanu Gollapudi switch (io_req->fcp_status) { 1921853e2bd2SBhanu Gollapudi case FC_GOOD: 1922853e2bd2SBhanu Gollapudi if (io_req->cdb_status == 0) { 1923853e2bd2SBhanu Gollapudi /* Good IO completion */ 1924853e2bd2SBhanu Gollapudi sc_cmd->result = DID_OK << 16; 1925853e2bd2SBhanu Gollapudi } else { 1926853e2bd2SBhanu Gollapudi /* Transport status is good, SCSI status not good */ 1927853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d" 1928853e2bd2SBhanu Gollapudi " fcp_resid = 0x%x\n", 1929853e2bd2SBhanu Gollapudi io_req->cdb_status, io_req->fcp_resid); 1930853e2bd2SBhanu Gollapudi sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1931853e2bd2SBhanu Gollapudi } 1932853e2bd2SBhanu Gollapudi if (io_req->fcp_resid) 1933853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, io_req->fcp_resid); 1934853e2bd2SBhanu Gollapudi break; 1935853e2bd2SBhanu Gollapudi default: 1936b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n", 1937853e2bd2SBhanu Gollapudi io_req->fcp_status); 1938853e2bd2SBhanu Gollapudi break; 1939853e2bd2SBhanu Gollapudi } 1940853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = NULL; 1941853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 1942853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1943853e2bd2SBhanu Gollapudi } 1944853e2bd2SBhanu Gollapudi 194574446954SBhanu Prakash Gollapudi int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, 1946853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req) 1947853e2bd2SBhanu Gollapudi { 1948853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 1949853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 1950853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1951853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port; 1952aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv; 1953aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 1954853e2bd2SBhanu Gollapudi struct fc_lport *lport = port->lport; 1955853e2bd2SBhanu Gollapudi struct fcoe_dev_stats *stats; 1956853e2bd2SBhanu Gollapudi int task_idx, index; 1957853e2bd2SBhanu Gollapudi u16 xid; 1958853e2bd2SBhanu Gollapudi 1959853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 1960853e2bd2SBhanu Gollapudi io_req->cmd_type = BNX2FC_SCSI_CMD; 1961853e2bd2SBhanu Gollapudi io_req->port = port; 1962853e2bd2SBhanu Gollapudi io_req->tgt = tgt; 1963853e2bd2SBhanu Gollapudi io_req->data_xfer_len = scsi_bufflen(sc_cmd); 1964853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = (char *)io_req; 1965853e2bd2SBhanu Gollapudi 1966853e2bd2SBhanu Gollapudi stats = per_cpu_ptr(lport->dev_stats, get_cpu()); 1967853e2bd2SBhanu Gollapudi if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { 1968853e2bd2SBhanu Gollapudi io_req->io_req_flags = BNX2FC_READ; 1969853e2bd2SBhanu Gollapudi stats->InputRequests++; 1970853e2bd2SBhanu Gollapudi stats->InputBytes += io_req->data_xfer_len; 1971853e2bd2SBhanu Gollapudi } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 1972853e2bd2SBhanu Gollapudi io_req->io_req_flags = BNX2FC_WRITE; 1973853e2bd2SBhanu Gollapudi stats->OutputRequests++; 1974853e2bd2SBhanu Gollapudi stats->OutputBytes += io_req->data_xfer_len; 1975853e2bd2SBhanu Gollapudi } else { 1976853e2bd2SBhanu Gollapudi io_req->io_req_flags = 0; 1977853e2bd2SBhanu Gollapudi stats->ControlRequests++; 1978853e2bd2SBhanu Gollapudi } 1979853e2bd2SBhanu Gollapudi put_cpu(); 1980853e2bd2SBhanu Gollapudi 1981853e2bd2SBhanu Gollapudi xid = io_req->xid; 1982853e2bd2SBhanu Gollapudi 1983853e2bd2SBhanu Gollapudi /* Build buffer descriptor list for firmware from sg list */ 1984822f2903SBhanu Prakash Gollapudi if (bnx2fc_build_bd_list_from_sg(io_req)) { 1985822f2903SBhanu Prakash Gollapudi printk(KERN_ERR PFX "BD list creation failed\n"); 1986822f2903SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 1987822f2903SBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1988822f2903SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1989822f2903SBhanu Prakash Gollapudi return -EAGAIN; 1990822f2903SBhanu Prakash Gollapudi } 1991853e2bd2SBhanu Gollapudi 1992853e2bd2SBhanu Gollapudi task_idx = xid / BNX2FC_TASKS_PER_PAGE; 1993853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 1994853e2bd2SBhanu Gollapudi 1995853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 1996853e2bd2SBhanu Gollapudi task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; 1997853e2bd2SBhanu Gollapudi task = &(task_page[index]); 1998853e2bd2SBhanu Gollapudi bnx2fc_init_task(io_req, task); 1999853e2bd2SBhanu Gollapudi 2000853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 2001853e2bd2SBhanu Gollapudi 2002853e2bd2SBhanu Gollapudi if (tgt->flush_in_prog) { 2003853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Flush in progress..Host Busy\n"); 2004853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2005853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 2006853e2bd2SBhanu Gollapudi return -EAGAIN; 2007853e2bd2SBhanu Gollapudi } 2008853e2bd2SBhanu Gollapudi 2009853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 2010853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Session not ready...post_io\n"); 2011853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2012853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 2013853e2bd2SBhanu Gollapudi return -EAGAIN; 2014853e2bd2SBhanu Gollapudi } 2015853e2bd2SBhanu Gollapudi 2016853e2bd2SBhanu Gollapudi /* Time IO req */ 2017b252f4c7SBhanu Prakash Gollapudi if (tgt->io_timeout) 2018853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); 2019853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 2020853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 2021853e2bd2SBhanu Gollapudi 2022853e2bd2SBhanu Gollapudi /* Enqueue the io_req to active_cmd_queue */ 2023853e2bd2SBhanu Gollapudi 2024853e2bd2SBhanu Gollapudi io_req->on_active_queue = 1; 2025853e2bd2SBhanu Gollapudi /* move io_req from pending_queue to active_queue */ 2026853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->active_cmd_queue); 2027853e2bd2SBhanu Gollapudi 2028853e2bd2SBhanu Gollapudi /* Ring doorbell */ 2029853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 2030853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 2031853e2bd2SBhanu Gollapudi return 0; 2032853e2bd2SBhanu Gollapudi } 2033