1de909d87SChad Dupuis /* bnx2fc_io.c: QLogic Linux FCoE offload driver. 2853e2bd2SBhanu Gollapudi * IO manager and SCSI IO processing. 3853e2bd2SBhanu Gollapudi * 4cf122191SBhanu Prakash Gollapudi * Copyright (c) 2008-2013 Broadcom Corporation 521144b80SChad Dupuis * Copyright (c) 2014-2016 QLogic Corporation 621144b80SChad Dupuis * Copyright (c) 2016-2017 Cavium Inc. 7853e2bd2SBhanu Gollapudi * 8853e2bd2SBhanu Gollapudi * This program is free software; you can redistribute it and/or modify 9853e2bd2SBhanu Gollapudi * it under the terms of the GNU General Public License as published by 10853e2bd2SBhanu Gollapudi * the Free Software Foundation. 11853e2bd2SBhanu Gollapudi * 12853e2bd2SBhanu Gollapudi * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com) 13853e2bd2SBhanu Gollapudi */ 14853e2bd2SBhanu Gollapudi 15853e2bd2SBhanu Gollapudi #include "bnx2fc.h" 160ea5c275SBhanu Gollapudi 170ea5c275SBhanu Gollapudi #define RESERVE_FREE_LIST_INDEX num_possible_cpus() 180ea5c275SBhanu Gollapudi 19853e2bd2SBhanu Gollapudi static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 20853e2bd2SBhanu Gollapudi int bd_index); 21853e2bd2SBhanu Gollapudi static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req); 22822f2903SBhanu Prakash Gollapudi static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); 23853e2bd2SBhanu Gollapudi static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); 24853e2bd2SBhanu Gollapudi static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); 25853e2bd2SBhanu Gollapudi static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, 26853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp, 2777331115SJaved Hasan u8 num_rq, unsigned char *rq_data); 28853e2bd2SBhanu Gollapudi 29853e2bd2SBhanu Gollapudi void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req, 30853e2bd2SBhanu Gollapudi unsigned int timer_msec) 31853e2bd2SBhanu Gollapudi { 32aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 33853e2bd2SBhanu Gollapudi 34aea71a02SBhanu Prakash Gollapudi if (queue_delayed_work(interface->timer_work_queue, 35aea71a02SBhanu Prakash Gollapudi &io_req->timeout_work, 36853e2bd2SBhanu Gollapudi msecs_to_jiffies(timer_msec))) 37853e2bd2SBhanu Gollapudi kref_get(&io_req->refcount); 38853e2bd2SBhanu Gollapudi } 39853e2bd2SBhanu Gollapudi 40853e2bd2SBhanu Gollapudi static void bnx2fc_cmd_timeout(struct work_struct *work) 41853e2bd2SBhanu Gollapudi { 42853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd, 43853e2bd2SBhanu Gollapudi timeout_work.work); 44853e2bd2SBhanu Gollapudi u8 cmd_type = io_req->cmd_type; 45853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 46853e2bd2SBhanu Gollapudi int rc; 47853e2bd2SBhanu Gollapudi 48853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d," 49853e2bd2SBhanu Gollapudi "req_flags = %lx\n", cmd_type, io_req->req_flags); 50853e2bd2SBhanu Gollapudi 51853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 52853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) { 53853e2bd2SBhanu Gollapudi clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 54853e2bd2SBhanu Gollapudi /* 55853e2bd2SBhanu Gollapudi * ideally we should hold the io_req until RRQ complets, 56853e2bd2SBhanu Gollapudi * and release io_req from timeout hold. 57853e2bd2SBhanu Gollapudi */ 58853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 59853e2bd2SBhanu Gollapudi bnx2fc_send_rrq(io_req); 60853e2bd2SBhanu Gollapudi return; 61853e2bd2SBhanu Gollapudi } 62853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) { 63853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n"); 64853e2bd2SBhanu Gollapudi goto done; 65853e2bd2SBhanu Gollapudi } 66853e2bd2SBhanu Gollapudi 67853e2bd2SBhanu Gollapudi switch (cmd_type) { 68853e2bd2SBhanu Gollapudi case BNX2FC_SCSI_CMD: 69853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 70853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 71853e2bd2SBhanu Gollapudi /* Handle eh_abort timeout */ 72853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "eh_abort timed out\n"); 730e0fcef9SSaurav Kashyap complete(&io_req->abts_done); 74853e2bd2SBhanu Gollapudi } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, 75853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 76853e2bd2SBhanu Gollapudi /* Handle internally generated ABTS timeout */ 77853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n", 782c935bc5SPeter Zijlstra kref_read(&io_req->refcount)); 79853e2bd2SBhanu Gollapudi if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 80853e2bd2SBhanu Gollapudi &io_req->req_flags))) { 8150a87414SChad Dupuis /* 8250a87414SChad Dupuis * Cleanup and return original command to 8350a87414SChad Dupuis * mid-layer. 8450a87414SChad Dupuis */ 8550a87414SChad Dupuis bnx2fc_initiate_cleanup(io_req); 86853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 87853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 88853e2bd2SBhanu Gollapudi 89853e2bd2SBhanu Gollapudi return; 90853e2bd2SBhanu Gollapudi } 91853e2bd2SBhanu Gollapudi } else { 92853e2bd2SBhanu Gollapudi /* Hanlde IO timeout */ 93853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n"); 94853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, 95853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 96853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO completed before " 97853e2bd2SBhanu Gollapudi " timer expiry\n"); 98853e2bd2SBhanu Gollapudi goto done; 99853e2bd2SBhanu Gollapudi } 100853e2bd2SBhanu Gollapudi 101853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 102853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 103853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(io_req); 104853e2bd2SBhanu Gollapudi if (rc == SUCCESS) 105853e2bd2SBhanu Gollapudi goto done; 10650a87414SChad Dupuis 107853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 108853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 109853e2bd2SBhanu Gollapudi 110853e2bd2SBhanu Gollapudi return; 111853e2bd2SBhanu Gollapudi } else { 112853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO already in " 113853e2bd2SBhanu Gollapudi "ABTS processing\n"); 114853e2bd2SBhanu Gollapudi } 115853e2bd2SBhanu Gollapudi } 116853e2bd2SBhanu Gollapudi break; 117853e2bd2SBhanu Gollapudi case BNX2FC_ELS: 118853e2bd2SBhanu Gollapudi 119853e2bd2SBhanu Gollapudi if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 120853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n"); 121853e2bd2SBhanu Gollapudi 122853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 123853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 124853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 125853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 126853e2bd2SBhanu Gollapudi 127853e2bd2SBhanu Gollapudi return; 128853e2bd2SBhanu Gollapudi } 129853e2bd2SBhanu Gollapudi } else { 130853e2bd2SBhanu Gollapudi /* 131853e2bd2SBhanu Gollapudi * Handle ELS timeout. 132853e2bd2SBhanu Gollapudi * tgt_lock is used to sync compl path and timeout 133853e2bd2SBhanu Gollapudi * path. If els compl path is processing this IO, we 134853e2bd2SBhanu Gollapudi * have nothing to do here, just release the timer hold 135853e2bd2SBhanu Gollapudi */ 136853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ELS timed out\n"); 137853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, 138853e2bd2SBhanu Gollapudi &io_req->req_flags)) 139853e2bd2SBhanu Gollapudi goto done; 140853e2bd2SBhanu Gollapudi 141853e2bd2SBhanu Gollapudi /* Indicate the cb_func that this ELS is timed out */ 142853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags); 143853e2bd2SBhanu Gollapudi 144853e2bd2SBhanu Gollapudi if ((io_req->cb_func) && (io_req->cb_arg)) { 145853e2bd2SBhanu Gollapudi io_req->cb_func(io_req->cb_arg); 146853e2bd2SBhanu Gollapudi io_req->cb_arg = NULL; 147853e2bd2SBhanu Gollapudi } 148853e2bd2SBhanu Gollapudi } 149853e2bd2SBhanu Gollapudi break; 150853e2bd2SBhanu Gollapudi default: 151853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n", 152853e2bd2SBhanu Gollapudi cmd_type); 153853e2bd2SBhanu Gollapudi break; 154853e2bd2SBhanu Gollapudi } 155853e2bd2SBhanu Gollapudi 156853e2bd2SBhanu Gollapudi done: 157853e2bd2SBhanu Gollapudi /* release the cmd that was held when timer was set */ 158853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 159853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 160853e2bd2SBhanu Gollapudi } 161853e2bd2SBhanu Gollapudi 162853e2bd2SBhanu Gollapudi static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code) 163853e2bd2SBhanu Gollapudi { 164853e2bd2SBhanu Gollapudi /* Called with host lock held */ 165853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 166853e2bd2SBhanu Gollapudi 167853e2bd2SBhanu Gollapudi /* 168853e2bd2SBhanu Gollapudi * active_cmd_queue may have other command types as well, 169853e2bd2SBhanu Gollapudi * and during flush operation, we want to error back only 170853e2bd2SBhanu Gollapudi * scsi commands. 171853e2bd2SBhanu Gollapudi */ 172853e2bd2SBhanu Gollapudi if (io_req->cmd_type != BNX2FC_SCSI_CMD) 173853e2bd2SBhanu Gollapudi return; 174853e2bd2SBhanu Gollapudi 175853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code); 17674446954SBhanu Prakash Gollapudi if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) { 17774446954SBhanu Prakash Gollapudi /* Do not call scsi done for this IO */ 17874446954SBhanu Prakash Gollapudi return; 17974446954SBhanu Prakash Gollapudi } 18074446954SBhanu Prakash Gollapudi 181853e2bd2SBhanu Gollapudi bnx2fc_unmap_sg_list(io_req); 182853e2bd2SBhanu Gollapudi io_req->sc_cmd = NULL; 183d02327a8SChad Dupuis 184d02327a8SChad Dupuis /* Sanity checks before returning command to mid-layer */ 185853e2bd2SBhanu Gollapudi if (!sc_cmd) { 186853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. " 187853e2bd2SBhanu Gollapudi "IO(0x%x) already cleaned up\n", 188853e2bd2SBhanu Gollapudi io_req->xid); 189853e2bd2SBhanu Gollapudi return; 190853e2bd2SBhanu Gollapudi } 191d02327a8SChad Dupuis if (!sc_cmd->device) { 192d02327a8SChad Dupuis pr_err(PFX "0x%x: sc_cmd->device is NULL.\n", io_req->xid); 193d02327a8SChad Dupuis return; 194d02327a8SChad Dupuis } 195d02327a8SChad Dupuis if (!sc_cmd->device->host) { 196d02327a8SChad Dupuis pr_err(PFX "0x%x: sc_cmd->device->host is NULL.\n", 197d02327a8SChad Dupuis io_req->xid); 198d02327a8SChad Dupuis return; 199d02327a8SChad Dupuis } 200d02327a8SChad Dupuis 201853e2bd2SBhanu Gollapudi sc_cmd->result = err_code << 16; 202853e2bd2SBhanu Gollapudi 203853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n", 204853e2bd2SBhanu Gollapudi sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries, 205853e2bd2SBhanu Gollapudi sc_cmd->allowed); 206853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 207853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = NULL; 208853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 209853e2bd2SBhanu Gollapudi } 210853e2bd2SBhanu Gollapudi 2110eb43b4bSBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba) 212853e2bd2SBhanu Gollapudi { 213853e2bd2SBhanu Gollapudi struct bnx2fc_cmd_mgr *cmgr; 214853e2bd2SBhanu Gollapudi struct io_bdt *bdt_info; 215853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 216853e2bd2SBhanu Gollapudi size_t len; 217853e2bd2SBhanu Gollapudi u32 mem_size; 218853e2bd2SBhanu Gollapudi u16 xid; 219853e2bd2SBhanu Gollapudi int i; 2200ea5c275SBhanu Gollapudi int num_ios, num_pri_ios; 221853e2bd2SBhanu Gollapudi size_t bd_tbl_sz; 2220ea5c275SBhanu Gollapudi int arr_sz = num_possible_cpus() + 1; 2230eb43b4bSBhanu Prakash Gollapudi u16 min_xid = BNX2FC_MIN_XID; 2240eb43b4bSBhanu Prakash Gollapudi u16 max_xid = hba->max_xid; 225853e2bd2SBhanu Gollapudi 226853e2bd2SBhanu Gollapudi if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { 227853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \ 228853e2bd2SBhanu Gollapudi and max_xid 0x%x\n", min_xid, max_xid); 229853e2bd2SBhanu Gollapudi return NULL; 230853e2bd2SBhanu Gollapudi } 231853e2bd2SBhanu Gollapudi BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid); 232853e2bd2SBhanu Gollapudi 233853e2bd2SBhanu Gollapudi num_ios = max_xid - min_xid + 1; 234853e2bd2SBhanu Gollapudi len = (num_ios * (sizeof(struct bnx2fc_cmd *))); 235853e2bd2SBhanu Gollapudi len += sizeof(struct bnx2fc_cmd_mgr); 236853e2bd2SBhanu Gollapudi 237853e2bd2SBhanu Gollapudi cmgr = kzalloc(len, GFP_KERNEL); 238853e2bd2SBhanu Gollapudi if (!cmgr) { 239853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc cmgr\n"); 240853e2bd2SBhanu Gollapudi return NULL; 241853e2bd2SBhanu Gollapudi } 242853e2bd2SBhanu Gollapudi 243b2d3492fSDan Carpenter cmgr->hba = hba; 2446396bb22SKees Cook cmgr->free_list = kcalloc(arr_sz, sizeof(*cmgr->free_list), 2456396bb22SKees Cook GFP_KERNEL); 246853e2bd2SBhanu Gollapudi if (!cmgr->free_list) { 247853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc free_list\n"); 248853e2bd2SBhanu Gollapudi goto mem_err; 249853e2bd2SBhanu Gollapudi } 250853e2bd2SBhanu Gollapudi 2516396bb22SKees Cook cmgr->free_list_lock = kcalloc(arr_sz, sizeof(*cmgr->free_list_lock), 2526396bb22SKees Cook GFP_KERNEL); 253853e2bd2SBhanu Gollapudi if (!cmgr->free_list_lock) { 254853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc free_list_lock\n"); 2559172b763SMaurizio Lombardi kfree(cmgr->free_list); 2569172b763SMaurizio Lombardi cmgr->free_list = NULL; 257853e2bd2SBhanu Gollapudi goto mem_err; 258853e2bd2SBhanu Gollapudi } 259853e2bd2SBhanu Gollapudi 260853e2bd2SBhanu Gollapudi cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1); 261853e2bd2SBhanu Gollapudi 2620ea5c275SBhanu Gollapudi for (i = 0; i < arr_sz; i++) { 263853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&cmgr->free_list[i]); 264853e2bd2SBhanu Gollapudi spin_lock_init(&cmgr->free_list_lock[i]); 265853e2bd2SBhanu Gollapudi } 266853e2bd2SBhanu Gollapudi 2670ea5c275SBhanu Gollapudi /* 2680ea5c275SBhanu Gollapudi * Pre-allocated pool of bnx2fc_cmds. 2690ea5c275SBhanu Gollapudi * Last entry in the free list array is the free list 2700ea5c275SBhanu Gollapudi * of slow path requests. 2710ea5c275SBhanu Gollapudi */ 272853e2bd2SBhanu Gollapudi xid = BNX2FC_MIN_XID; 2730eb43b4bSBhanu Prakash Gollapudi num_pri_ios = num_ios - hba->elstm_xids; 274853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 275853e2bd2SBhanu Gollapudi io_req = kzalloc(sizeof(*io_req), GFP_KERNEL); 276853e2bd2SBhanu Gollapudi 277853e2bd2SBhanu Gollapudi if (!io_req) { 278853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc io_req\n"); 279853e2bd2SBhanu Gollapudi goto mem_err; 280853e2bd2SBhanu Gollapudi } 281853e2bd2SBhanu Gollapudi 282853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link); 283853e2bd2SBhanu Gollapudi INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout); 284853e2bd2SBhanu Gollapudi 285853e2bd2SBhanu Gollapudi io_req->xid = xid++; 2860ea5c275SBhanu Gollapudi if (i < num_pri_ios) 287853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, 2880ea5c275SBhanu Gollapudi &cmgr->free_list[io_req->xid % 2890ea5c275SBhanu Gollapudi num_possible_cpus()]); 2900ea5c275SBhanu Gollapudi else 2910ea5c275SBhanu Gollapudi list_add_tail(&io_req->link, 2920ea5c275SBhanu Gollapudi &cmgr->free_list[num_possible_cpus()]); 293853e2bd2SBhanu Gollapudi io_req++; 294853e2bd2SBhanu Gollapudi } 295853e2bd2SBhanu Gollapudi 296853e2bd2SBhanu Gollapudi /* Allocate pool of io_bdts - one for each bnx2fc_cmd */ 297853e2bd2SBhanu Gollapudi mem_size = num_ios * sizeof(struct io_bdt *); 298b2d3492fSDan Carpenter cmgr->io_bdt_pool = kzalloc(mem_size, GFP_KERNEL); 299853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool) { 300853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n"); 301853e2bd2SBhanu Gollapudi goto mem_err; 302853e2bd2SBhanu Gollapudi } 303853e2bd2SBhanu Gollapudi 304853e2bd2SBhanu Gollapudi mem_size = sizeof(struct io_bdt); 305853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 306853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL); 307853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool[i]) { 308853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc " 309853e2bd2SBhanu Gollapudi "io_bdt_pool[%d]\n", i); 310853e2bd2SBhanu Gollapudi goto mem_err; 311853e2bd2SBhanu Gollapudi } 312853e2bd2SBhanu Gollapudi } 313853e2bd2SBhanu Gollapudi 314853e2bd2SBhanu Gollapudi /* Allocate an map fcoe_bdt_ctx structures */ 315853e2bd2SBhanu Gollapudi bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); 316853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 317853e2bd2SBhanu Gollapudi bdt_info = cmgr->io_bdt_pool[i]; 318853e2bd2SBhanu Gollapudi bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, 319853e2bd2SBhanu Gollapudi bd_tbl_sz, 320853e2bd2SBhanu Gollapudi &bdt_info->bd_tbl_dma, 321853e2bd2SBhanu Gollapudi GFP_KERNEL); 322853e2bd2SBhanu Gollapudi if (!bdt_info->bd_tbl) { 323853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc " 324853e2bd2SBhanu Gollapudi "bdt_tbl[%d]\n", i); 325853e2bd2SBhanu Gollapudi goto mem_err; 326853e2bd2SBhanu Gollapudi } 327853e2bd2SBhanu Gollapudi } 328853e2bd2SBhanu Gollapudi 329853e2bd2SBhanu Gollapudi return cmgr; 330853e2bd2SBhanu Gollapudi 331853e2bd2SBhanu Gollapudi mem_err: 332853e2bd2SBhanu Gollapudi bnx2fc_cmd_mgr_free(cmgr); 333853e2bd2SBhanu Gollapudi return NULL; 334853e2bd2SBhanu Gollapudi } 335853e2bd2SBhanu Gollapudi 336853e2bd2SBhanu Gollapudi void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr) 337853e2bd2SBhanu Gollapudi { 338853e2bd2SBhanu Gollapudi struct io_bdt *bdt_info; 339853e2bd2SBhanu Gollapudi struct bnx2fc_hba *hba = cmgr->hba; 340853e2bd2SBhanu Gollapudi size_t bd_tbl_sz; 341853e2bd2SBhanu Gollapudi u16 min_xid = BNX2FC_MIN_XID; 3420eb43b4bSBhanu Prakash Gollapudi u16 max_xid = hba->max_xid; 343853e2bd2SBhanu Gollapudi int num_ios; 344853e2bd2SBhanu Gollapudi int i; 345853e2bd2SBhanu Gollapudi 346853e2bd2SBhanu Gollapudi num_ios = max_xid - min_xid + 1; 347853e2bd2SBhanu Gollapudi 348853e2bd2SBhanu Gollapudi /* Free fcoe_bdt_ctx structures */ 349853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool) 350853e2bd2SBhanu Gollapudi goto free_cmd_pool; 351853e2bd2SBhanu Gollapudi 352853e2bd2SBhanu Gollapudi bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); 353853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 354853e2bd2SBhanu Gollapudi bdt_info = cmgr->io_bdt_pool[i]; 355853e2bd2SBhanu Gollapudi if (bdt_info->bd_tbl) { 356853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz, 357853e2bd2SBhanu Gollapudi bdt_info->bd_tbl, 358853e2bd2SBhanu Gollapudi bdt_info->bd_tbl_dma); 359853e2bd2SBhanu Gollapudi bdt_info->bd_tbl = NULL; 360853e2bd2SBhanu Gollapudi } 361853e2bd2SBhanu Gollapudi } 362853e2bd2SBhanu Gollapudi 363853e2bd2SBhanu Gollapudi /* Destroy io_bdt pool */ 364853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) { 365853e2bd2SBhanu Gollapudi kfree(cmgr->io_bdt_pool[i]); 366853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool[i] = NULL; 367853e2bd2SBhanu Gollapudi } 368853e2bd2SBhanu Gollapudi 369853e2bd2SBhanu Gollapudi kfree(cmgr->io_bdt_pool); 370853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool = NULL; 371853e2bd2SBhanu Gollapudi 372853e2bd2SBhanu Gollapudi free_cmd_pool: 373853e2bd2SBhanu Gollapudi kfree(cmgr->free_list_lock); 374853e2bd2SBhanu Gollapudi 375853e2bd2SBhanu Gollapudi /* Destroy cmd pool */ 376853e2bd2SBhanu Gollapudi if (!cmgr->free_list) 377853e2bd2SBhanu Gollapudi goto free_cmgr; 378853e2bd2SBhanu Gollapudi 3790ea5c275SBhanu Gollapudi for (i = 0; i < num_possible_cpus() + 1; i++) { 380d71fb3bdSBhanu Prakash Gollapudi struct bnx2fc_cmd *tmp, *io_req; 381853e2bd2SBhanu Gollapudi 382d71fb3bdSBhanu Prakash Gollapudi list_for_each_entry_safe(io_req, tmp, 383d71fb3bdSBhanu Prakash Gollapudi &cmgr->free_list[i], link) { 384853e2bd2SBhanu Gollapudi list_del(&io_req->link); 385853e2bd2SBhanu Gollapudi kfree(io_req); 386853e2bd2SBhanu Gollapudi } 387853e2bd2SBhanu Gollapudi } 388853e2bd2SBhanu Gollapudi kfree(cmgr->free_list); 389853e2bd2SBhanu Gollapudi free_cmgr: 390853e2bd2SBhanu Gollapudi /* Free command manager itself */ 391853e2bd2SBhanu Gollapudi kfree(cmgr); 392853e2bd2SBhanu Gollapudi } 393853e2bd2SBhanu Gollapudi 394853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type) 395853e2bd2SBhanu Gollapudi { 396853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port; 397aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv; 398aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; 399853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 400853e2bd2SBhanu Gollapudi struct list_head *listp; 401853e2bd2SBhanu Gollapudi struct io_bdt *bd_tbl; 4020ea5c275SBhanu Gollapudi int index = RESERVE_FREE_LIST_INDEX; 403619c5cb6SVlad Zolotarov u32 free_sqes; 404853e2bd2SBhanu Gollapudi u32 max_sqes; 405853e2bd2SBhanu Gollapudi u16 xid; 406853e2bd2SBhanu Gollapudi 407853e2bd2SBhanu Gollapudi max_sqes = tgt->max_sqes; 408853e2bd2SBhanu Gollapudi switch (type) { 409853e2bd2SBhanu Gollapudi case BNX2FC_TASK_MGMT_CMD: 410853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_TM_MAX_SQES; 411853e2bd2SBhanu Gollapudi break; 412853e2bd2SBhanu Gollapudi case BNX2FC_ELS: 413853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_ELS_MAX_SQES; 414853e2bd2SBhanu Gollapudi break; 415853e2bd2SBhanu Gollapudi default: 416853e2bd2SBhanu Gollapudi break; 417853e2bd2SBhanu Gollapudi } 418853e2bd2SBhanu Gollapudi 419853e2bd2SBhanu Gollapudi /* 420853e2bd2SBhanu Gollapudi * NOTE: Free list insertions and deletions are protected with 421853e2bd2SBhanu Gollapudi * cmgr lock 422853e2bd2SBhanu Gollapudi */ 4230ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]); 424619c5cb6SVlad Zolotarov free_sqes = atomic_read(&tgt->free_sqes); 4250ea5c275SBhanu Gollapudi if ((list_empty(&(cmd_mgr->free_list[index]))) || 426619c5cb6SVlad Zolotarov (tgt->num_active_ios.counter >= max_sqes) || 427619c5cb6SVlad Zolotarov (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { 428853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available " 429853e2bd2SBhanu Gollapudi "ios(%d):sqes(%d)\n", 430853e2bd2SBhanu Gollapudi tgt->num_active_ios.counter, tgt->max_sqes); 4310ea5c275SBhanu Gollapudi if (list_empty(&(cmd_mgr->free_list[index]))) 432853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "elstm_alloc: list_empty\n"); 4330ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 434853e2bd2SBhanu Gollapudi return NULL; 435853e2bd2SBhanu Gollapudi } 436853e2bd2SBhanu Gollapudi 437853e2bd2SBhanu Gollapudi listp = (struct list_head *) 4380ea5c275SBhanu Gollapudi cmd_mgr->free_list[index].next; 439853e2bd2SBhanu Gollapudi list_del_init(listp); 440853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *) listp; 441853e2bd2SBhanu Gollapudi xid = io_req->xid; 442853e2bd2SBhanu Gollapudi cmd_mgr->cmds[xid] = io_req; 443853e2bd2SBhanu Gollapudi atomic_inc(&tgt->num_active_ios); 444619c5cb6SVlad Zolotarov atomic_dec(&tgt->free_sqes); 4450ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 446853e2bd2SBhanu Gollapudi 447853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link); 448853e2bd2SBhanu Gollapudi 449853e2bd2SBhanu Gollapudi io_req->port = port; 450853e2bd2SBhanu Gollapudi io_req->cmd_mgr = cmd_mgr; 451853e2bd2SBhanu Gollapudi io_req->req_flags = 0; 452853e2bd2SBhanu Gollapudi io_req->cmd_type = type; 453853e2bd2SBhanu Gollapudi 454853e2bd2SBhanu Gollapudi /* Bind io_bdt for this io_req */ 455853e2bd2SBhanu Gollapudi /* Have a static link between io_req and io_bdt_pool */ 456853e2bd2SBhanu Gollapudi bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 457853e2bd2SBhanu Gollapudi bd_tbl->io_req = io_req; 458853e2bd2SBhanu Gollapudi 459853e2bd2SBhanu Gollapudi /* Hold the io_req against deletion */ 460853e2bd2SBhanu Gollapudi kref_init(&io_req->refcount); 461853e2bd2SBhanu Gollapudi return io_req; 462853e2bd2SBhanu Gollapudi } 463aea71a02SBhanu Prakash Gollapudi 464aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt) 465853e2bd2SBhanu Gollapudi { 466853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port; 467aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv; 468aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; 469853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 470853e2bd2SBhanu Gollapudi struct list_head *listp; 471853e2bd2SBhanu Gollapudi struct io_bdt *bd_tbl; 472619c5cb6SVlad Zolotarov u32 free_sqes; 473853e2bd2SBhanu Gollapudi u32 max_sqes; 474853e2bd2SBhanu Gollapudi u16 xid; 4750ea5c275SBhanu Gollapudi int index = get_cpu(); 476853e2bd2SBhanu Gollapudi 477853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_SCSI_MAX_SQES; 478853e2bd2SBhanu Gollapudi /* 479853e2bd2SBhanu Gollapudi * NOTE: Free list insertions and deletions are protected with 480853e2bd2SBhanu Gollapudi * cmgr lock 481853e2bd2SBhanu Gollapudi */ 4820ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]); 483619c5cb6SVlad Zolotarov free_sqes = atomic_read(&tgt->free_sqes); 4840ea5c275SBhanu Gollapudi if ((list_empty(&cmd_mgr->free_list[index])) || 485619c5cb6SVlad Zolotarov (tgt->num_active_ios.counter >= max_sqes) || 486619c5cb6SVlad Zolotarov (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { 4870ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 4880ea5c275SBhanu Gollapudi put_cpu(); 489853e2bd2SBhanu Gollapudi return NULL; 490853e2bd2SBhanu Gollapudi } 491853e2bd2SBhanu Gollapudi 492853e2bd2SBhanu Gollapudi listp = (struct list_head *) 4930ea5c275SBhanu Gollapudi cmd_mgr->free_list[index].next; 494853e2bd2SBhanu Gollapudi list_del_init(listp); 495853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *) listp; 496853e2bd2SBhanu Gollapudi xid = io_req->xid; 497853e2bd2SBhanu Gollapudi cmd_mgr->cmds[xid] = io_req; 498853e2bd2SBhanu Gollapudi atomic_inc(&tgt->num_active_ios); 499619c5cb6SVlad Zolotarov atomic_dec(&tgt->free_sqes); 5000ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 5010ea5c275SBhanu Gollapudi put_cpu(); 502853e2bd2SBhanu Gollapudi 503853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link); 504853e2bd2SBhanu Gollapudi 505853e2bd2SBhanu Gollapudi io_req->port = port; 506853e2bd2SBhanu Gollapudi io_req->cmd_mgr = cmd_mgr; 507853e2bd2SBhanu Gollapudi io_req->req_flags = 0; 508853e2bd2SBhanu Gollapudi 509853e2bd2SBhanu Gollapudi /* Bind io_bdt for this io_req */ 510853e2bd2SBhanu Gollapudi /* Have a static link between io_req and io_bdt_pool */ 511853e2bd2SBhanu Gollapudi bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 512853e2bd2SBhanu Gollapudi bd_tbl->io_req = io_req; 513853e2bd2SBhanu Gollapudi 514853e2bd2SBhanu Gollapudi /* Hold the io_req against deletion */ 515853e2bd2SBhanu Gollapudi kref_init(&io_req->refcount); 516853e2bd2SBhanu Gollapudi return io_req; 517853e2bd2SBhanu Gollapudi } 518853e2bd2SBhanu Gollapudi 519853e2bd2SBhanu Gollapudi void bnx2fc_cmd_release(struct kref *ref) 520853e2bd2SBhanu Gollapudi { 521853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req = container_of(ref, 522853e2bd2SBhanu Gollapudi struct bnx2fc_cmd, refcount); 523853e2bd2SBhanu Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; 5240ea5c275SBhanu Gollapudi int index; 525853e2bd2SBhanu Gollapudi 5260ea5c275SBhanu Gollapudi if (io_req->cmd_type == BNX2FC_SCSI_CMD) 5270ea5c275SBhanu Gollapudi index = io_req->xid % num_possible_cpus(); 5280ea5c275SBhanu Gollapudi else 5290ea5c275SBhanu Gollapudi index = RESERVE_FREE_LIST_INDEX; 5300ea5c275SBhanu Gollapudi 5310ea5c275SBhanu Gollapudi 5320ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]); 533853e2bd2SBhanu Gollapudi if (io_req->cmd_type != BNX2FC_SCSI_CMD) 534853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 535853e2bd2SBhanu Gollapudi cmd_mgr->cmds[io_req->xid] = NULL; 536853e2bd2SBhanu Gollapudi /* Delete IO from retire queue */ 537853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 538853e2bd2SBhanu Gollapudi /* Add it to the free list */ 539853e2bd2SBhanu Gollapudi list_add(&io_req->link, 5400ea5c275SBhanu Gollapudi &cmd_mgr->free_list[index]); 541853e2bd2SBhanu Gollapudi atomic_dec(&io_req->tgt->num_active_ios); 5420ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 5430ea5c275SBhanu Gollapudi 544853e2bd2SBhanu Gollapudi } 545853e2bd2SBhanu Gollapudi 546853e2bd2SBhanu Gollapudi static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) 547853e2bd2SBhanu Gollapudi { 548853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); 549aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 550aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 551853e2bd2SBhanu Gollapudi size_t sz = sizeof(struct fcoe_bd_ctx); 552853e2bd2SBhanu Gollapudi 553853e2bd2SBhanu Gollapudi /* clear tm flags */ 554853e2bd2SBhanu Gollapudi mp_req->tm_flags = 0; 555853e2bd2SBhanu Gollapudi if (mp_req->mp_req_bd) { 556853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, sz, 557853e2bd2SBhanu Gollapudi mp_req->mp_req_bd, 558853e2bd2SBhanu Gollapudi mp_req->mp_req_bd_dma); 559853e2bd2SBhanu Gollapudi mp_req->mp_req_bd = NULL; 560853e2bd2SBhanu Gollapudi } 561853e2bd2SBhanu Gollapudi if (mp_req->mp_resp_bd) { 562853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, sz, 563853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd, 564853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd_dma); 565853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd = NULL; 566853e2bd2SBhanu Gollapudi } 567853e2bd2SBhanu Gollapudi if (mp_req->req_buf) { 568be1fefc2SMichael Chan dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 569853e2bd2SBhanu Gollapudi mp_req->req_buf, 570853e2bd2SBhanu Gollapudi mp_req->req_buf_dma); 571853e2bd2SBhanu Gollapudi mp_req->req_buf = NULL; 572853e2bd2SBhanu Gollapudi } 573853e2bd2SBhanu Gollapudi if (mp_req->resp_buf) { 574be1fefc2SMichael Chan dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 575853e2bd2SBhanu Gollapudi mp_req->resp_buf, 576853e2bd2SBhanu Gollapudi mp_req->resp_buf_dma); 577853e2bd2SBhanu Gollapudi mp_req->resp_buf = NULL; 578853e2bd2SBhanu Gollapudi } 579853e2bd2SBhanu Gollapudi } 580853e2bd2SBhanu Gollapudi 581853e2bd2SBhanu Gollapudi int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) 582853e2bd2SBhanu Gollapudi { 583853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *mp_req; 584853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *mp_req_bd; 585853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *mp_resp_bd; 586aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 587aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 588853e2bd2SBhanu Gollapudi dma_addr_t addr; 589853e2bd2SBhanu Gollapudi size_t sz; 590853e2bd2SBhanu Gollapudi 591853e2bd2SBhanu Gollapudi mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 592853e2bd2SBhanu Gollapudi memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); 593853e2bd2SBhanu Gollapudi 5941fffa199SChad Dupuis if (io_req->cmd_type != BNX2FC_ELS) { 595853e2bd2SBhanu Gollapudi mp_req->req_len = sizeof(struct fcp_cmnd); 596853e2bd2SBhanu Gollapudi io_req->data_xfer_len = mp_req->req_len; 5971fffa199SChad Dupuis } else 5981fffa199SChad Dupuis mp_req->req_len = io_req->data_xfer_len; 5991fffa199SChad Dupuis 600be1fefc2SMichael Chan mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 601853e2bd2SBhanu Gollapudi &mp_req->req_buf_dma, 602853e2bd2SBhanu Gollapudi GFP_ATOMIC); 603853e2bd2SBhanu Gollapudi if (!mp_req->req_buf) { 604853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP req buffer\n"); 605853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 606853e2bd2SBhanu Gollapudi return FAILED; 607853e2bd2SBhanu Gollapudi } 608853e2bd2SBhanu Gollapudi 609be1fefc2SMichael Chan mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 610853e2bd2SBhanu Gollapudi &mp_req->resp_buf_dma, 611853e2bd2SBhanu Gollapudi GFP_ATOMIC); 612853e2bd2SBhanu Gollapudi if (!mp_req->resp_buf) { 613853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc TM resp buffer\n"); 614853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 615853e2bd2SBhanu Gollapudi return FAILED; 616853e2bd2SBhanu Gollapudi } 617be1fefc2SMichael Chan memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE); 618be1fefc2SMichael Chan memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE); 619853e2bd2SBhanu Gollapudi 620853e2bd2SBhanu Gollapudi /* Allocate and map mp_req_bd and mp_resp_bd */ 621853e2bd2SBhanu Gollapudi sz = sizeof(struct fcoe_bd_ctx); 622853e2bd2SBhanu Gollapudi mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 623853e2bd2SBhanu Gollapudi &mp_req->mp_req_bd_dma, 624853e2bd2SBhanu Gollapudi GFP_ATOMIC); 625853e2bd2SBhanu Gollapudi if (!mp_req->mp_req_bd) { 626853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP req bd\n"); 627853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 628853e2bd2SBhanu Gollapudi return FAILED; 629853e2bd2SBhanu Gollapudi } 630853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 631853e2bd2SBhanu Gollapudi &mp_req->mp_resp_bd_dma, 632853e2bd2SBhanu Gollapudi GFP_ATOMIC); 633b0d5e15cSJulia Lawall if (!mp_req->mp_resp_bd) { 634853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP resp bd\n"); 635853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req); 636853e2bd2SBhanu Gollapudi return FAILED; 637853e2bd2SBhanu Gollapudi } 638853e2bd2SBhanu Gollapudi /* Fill bd table */ 639853e2bd2SBhanu Gollapudi addr = mp_req->req_buf_dma; 640853e2bd2SBhanu Gollapudi mp_req_bd = mp_req->mp_req_bd; 641853e2bd2SBhanu Gollapudi mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; 642853e2bd2SBhanu Gollapudi mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); 643be1fefc2SMichael Chan mp_req_bd->buf_len = CNIC_PAGE_SIZE; 644853e2bd2SBhanu Gollapudi mp_req_bd->flags = 0; 645853e2bd2SBhanu Gollapudi 646853e2bd2SBhanu Gollapudi /* 647853e2bd2SBhanu Gollapudi * MP buffer is either a task mgmt command or an ELS. 648853e2bd2SBhanu Gollapudi * So the assumption is that it consumes a single bd 649853e2bd2SBhanu Gollapudi * entry in the bd table 650853e2bd2SBhanu Gollapudi */ 651853e2bd2SBhanu Gollapudi mp_resp_bd = mp_req->mp_resp_bd; 652853e2bd2SBhanu Gollapudi addr = mp_req->resp_buf_dma; 653853e2bd2SBhanu Gollapudi mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; 654853e2bd2SBhanu Gollapudi mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); 655be1fefc2SMichael Chan mp_resp_bd->buf_len = CNIC_PAGE_SIZE; 656853e2bd2SBhanu Gollapudi mp_resp_bd->flags = 0; 657853e2bd2SBhanu Gollapudi 658853e2bd2SBhanu Gollapudi return SUCCESS; 659853e2bd2SBhanu Gollapudi } 660853e2bd2SBhanu Gollapudi 661853e2bd2SBhanu Gollapudi static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 662853e2bd2SBhanu Gollapudi { 663853e2bd2SBhanu Gollapudi struct fc_lport *lport; 66433c7da05SJulia Lawall struct fc_rport *rport; 66533c7da05SJulia Lawall struct fc_rport_libfc_priv *rp; 666853e2bd2SBhanu Gollapudi struct fcoe_port *port; 667aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 668853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt; 669853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 670853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *tm_req; 671853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 672853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 673853e2bd2SBhanu Gollapudi struct Scsi_Host *host = sc_cmd->device->host; 674853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr; 675853e2bd2SBhanu Gollapudi struct fcp_cmnd *fcp_cmnd; 676853e2bd2SBhanu Gollapudi int task_idx, index; 677853e2bd2SBhanu Gollapudi int rc = SUCCESS; 678853e2bd2SBhanu Gollapudi u16 xid; 679853e2bd2SBhanu Gollapudi u32 sid, did; 680853e2bd2SBhanu Gollapudi unsigned long start = jiffies; 681853e2bd2SBhanu Gollapudi 682853e2bd2SBhanu Gollapudi lport = shost_priv(host); 68333c7da05SJulia Lawall rport = starget_to_rport(scsi_target(sc_cmd->device)); 684853e2bd2SBhanu Gollapudi port = lport_priv(lport); 685aea71a02SBhanu Prakash Gollapudi interface = port->priv; 686853e2bd2SBhanu Gollapudi 687853e2bd2SBhanu Gollapudi if (rport == NULL) { 688b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "device_reset: rport is NULL\n"); 689853e2bd2SBhanu Gollapudi rc = FAILED; 690853e2bd2SBhanu Gollapudi goto tmf_err; 691853e2bd2SBhanu Gollapudi } 69233c7da05SJulia Lawall rp = rport->dd_data; 693853e2bd2SBhanu Gollapudi 694853e2bd2SBhanu Gollapudi rc = fc_block_scsi_eh(sc_cmd); 695853e2bd2SBhanu Gollapudi if (rc) 696853e2bd2SBhanu Gollapudi return rc; 697853e2bd2SBhanu Gollapudi 698853e2bd2SBhanu Gollapudi if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 699853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "device_reset: link is not ready\n"); 700853e2bd2SBhanu Gollapudi rc = FAILED; 701853e2bd2SBhanu Gollapudi goto tmf_err; 702853e2bd2SBhanu Gollapudi } 703853e2bd2SBhanu Gollapudi /* rport and tgt are allocated together, so tgt should be non-NULL */ 704853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1]; 705853e2bd2SBhanu Gollapudi 706853e2bd2SBhanu Gollapudi if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { 707853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); 708853e2bd2SBhanu Gollapudi rc = FAILED; 709853e2bd2SBhanu Gollapudi goto tmf_err; 710853e2bd2SBhanu Gollapudi } 711853e2bd2SBhanu Gollapudi retry_tmf: 712853e2bd2SBhanu Gollapudi io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); 713853e2bd2SBhanu Gollapudi if (!io_req) { 714853e2bd2SBhanu Gollapudi if (time_after(jiffies, start + HZ)) { 715853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tmf: Failed TMF"); 716853e2bd2SBhanu Gollapudi rc = FAILED; 717853e2bd2SBhanu Gollapudi goto tmf_err; 718853e2bd2SBhanu Gollapudi } 719853e2bd2SBhanu Gollapudi msleep(20); 720853e2bd2SBhanu Gollapudi goto retry_tmf; 721853e2bd2SBhanu Gollapudi } 722853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 723853e2bd2SBhanu Gollapudi io_req->sc_cmd = sc_cmd; 724853e2bd2SBhanu Gollapudi io_req->port = port; 725853e2bd2SBhanu Gollapudi io_req->tgt = tgt; 726853e2bd2SBhanu Gollapudi 727853e2bd2SBhanu Gollapudi tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 728853e2bd2SBhanu Gollapudi 729853e2bd2SBhanu Gollapudi rc = bnx2fc_init_mp_req(io_req); 730853e2bd2SBhanu Gollapudi if (rc == FAILED) { 731853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); 732bd4d5de8SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 733853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 734bd4d5de8SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 735853e2bd2SBhanu Gollapudi goto tmf_err; 736853e2bd2SBhanu Gollapudi } 737853e2bd2SBhanu Gollapudi 738853e2bd2SBhanu Gollapudi /* Set TM flags */ 739853e2bd2SBhanu Gollapudi io_req->io_req_flags = 0; 740853e2bd2SBhanu Gollapudi tm_req->tm_flags = tm_flags; 741853e2bd2SBhanu Gollapudi 742853e2bd2SBhanu Gollapudi /* Fill FCP_CMND */ 743853e2bd2SBhanu Gollapudi bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); 744853e2bd2SBhanu Gollapudi fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; 745853e2bd2SBhanu Gollapudi memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); 746853e2bd2SBhanu Gollapudi fcp_cmnd->fc_dl = 0; 747853e2bd2SBhanu Gollapudi 748853e2bd2SBhanu Gollapudi /* Fill FC header */ 749853e2bd2SBhanu Gollapudi fc_hdr = &(tm_req->req_fc_hdr); 750853e2bd2SBhanu Gollapudi sid = tgt->sid; 751853e2bd2SBhanu Gollapudi did = rport->port_id; 752853e2bd2SBhanu Gollapudi __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, 753853e2bd2SBhanu Gollapudi FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 754853e2bd2SBhanu Gollapudi FC_FC_SEQ_INIT, 0); 755853e2bd2SBhanu Gollapudi /* Obtain exchange id */ 756853e2bd2SBhanu Gollapudi xid = io_req->xid; 757853e2bd2SBhanu Gollapudi 758853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); 759853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 760853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 761853e2bd2SBhanu Gollapudi 762853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 763aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 764aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 765853e2bd2SBhanu Gollapudi task = &(task_page[index]); 766853e2bd2SBhanu Gollapudi bnx2fc_init_mp_task(io_req, task); 767853e2bd2SBhanu Gollapudi 768853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = (char *)io_req; 769853e2bd2SBhanu Gollapudi 770853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 771853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 772853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 773853e2bd2SBhanu Gollapudi 774853e2bd2SBhanu Gollapudi /* Enqueue the io_req to active_tm_queue */ 775853e2bd2SBhanu Gollapudi io_req->on_tmf_queue = 1; 776853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->active_tm_queue); 777853e2bd2SBhanu Gollapudi 7780e0fcef9SSaurav Kashyap init_completion(&io_req->abts_done); 7790e0fcef9SSaurav Kashyap io_req->wait_for_abts_comp = 1; 780853e2bd2SBhanu Gollapudi 781853e2bd2SBhanu Gollapudi /* Ring doorbell */ 782853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 783853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 784853e2bd2SBhanu Gollapudi 7850e0fcef9SSaurav Kashyap rc = wait_for_completion_timeout(&io_req->abts_done, 78610755d3fSJoe Carnuccio interface->tm_timeout * HZ); 787853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 788853e2bd2SBhanu Gollapudi 7890e0fcef9SSaurav Kashyap io_req->wait_for_abts_comp = 0; 79092886c9cSBhanu Prakash Gollapudi if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) { 791853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); 79292886c9cSBhanu Prakash Gollapudi if (io_req->on_tmf_queue) { 79392886c9cSBhanu Prakash Gollapudi list_del_init(&io_req->link); 79492886c9cSBhanu Prakash Gollapudi io_req->on_tmf_queue = 0; 79592886c9cSBhanu Prakash Gollapudi } 7960e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 1; 7970e0fcef9SSaurav Kashyap init_completion(&io_req->cleanup_done); 79892886c9cSBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req); 79992886c9cSBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 8000e0fcef9SSaurav Kashyap rc = wait_for_completion_timeout(&io_req->cleanup_done, 80192886c9cSBhanu Prakash Gollapudi BNX2FC_FW_TIMEOUT); 80292886c9cSBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 8030e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 0; 80492886c9cSBhanu Prakash Gollapudi if (!rc) 80592886c9cSBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 80692886c9cSBhanu Prakash Gollapudi } 807853e2bd2SBhanu Gollapudi 808853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 809853e2bd2SBhanu Gollapudi 810853e2bd2SBhanu Gollapudi if (!rc) { 811b2a554ffSBhanu Prakash Gollapudi BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n"); 812853e2bd2SBhanu Gollapudi rc = FAILED; 813853e2bd2SBhanu Gollapudi } else { 814b2a554ffSBhanu Prakash Gollapudi BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n"); 815853e2bd2SBhanu Gollapudi rc = SUCCESS; 816853e2bd2SBhanu Gollapudi } 817853e2bd2SBhanu Gollapudi tmf_err: 818853e2bd2SBhanu Gollapudi return rc; 819853e2bd2SBhanu Gollapudi } 820853e2bd2SBhanu Gollapudi 821853e2bd2SBhanu Gollapudi int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) 822853e2bd2SBhanu Gollapudi { 823853e2bd2SBhanu Gollapudi struct fc_lport *lport; 824853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 825853e2bd2SBhanu Gollapudi struct fc_rport *rport = tgt->rport; 826853e2bd2SBhanu Gollapudi struct fc_rport_priv *rdata = tgt->rdata; 827aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 828853e2bd2SBhanu Gollapudi struct fcoe_port *port; 829853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *abts_io_req; 830853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 831853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 832853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr; 833853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *abts_req; 834853e2bd2SBhanu Gollapudi int task_idx, index; 835853e2bd2SBhanu Gollapudi u32 sid, did; 836853e2bd2SBhanu Gollapudi u16 xid; 837853e2bd2SBhanu Gollapudi int rc = SUCCESS; 838853e2bd2SBhanu Gollapudi u32 r_a_tov = rdata->r_a_tov; 839853e2bd2SBhanu Gollapudi 840853e2bd2SBhanu Gollapudi /* called with tgt_lock held */ 841853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); 842853e2bd2SBhanu Gollapudi 843853e2bd2SBhanu Gollapudi port = io_req->port; 844aea71a02SBhanu Prakash Gollapudi interface = port->priv; 845853e2bd2SBhanu Gollapudi lport = port->lport; 846853e2bd2SBhanu Gollapudi 847853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 848853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); 849853e2bd2SBhanu Gollapudi rc = FAILED; 850853e2bd2SBhanu Gollapudi goto abts_err; 851853e2bd2SBhanu Gollapudi } 852853e2bd2SBhanu Gollapudi 853853e2bd2SBhanu Gollapudi if (rport == NULL) { 854b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "initiate_abts: rport is NULL\n"); 855853e2bd2SBhanu Gollapudi rc = FAILED; 856853e2bd2SBhanu Gollapudi goto abts_err; 857853e2bd2SBhanu Gollapudi } 858853e2bd2SBhanu Gollapudi 859853e2bd2SBhanu Gollapudi if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 860853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); 861853e2bd2SBhanu Gollapudi rc = FAILED; 862853e2bd2SBhanu Gollapudi goto abts_err; 863853e2bd2SBhanu Gollapudi } 864853e2bd2SBhanu Gollapudi 865853e2bd2SBhanu Gollapudi abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); 866853e2bd2SBhanu Gollapudi if (!abts_io_req) { 867886a0b54SColin Ian King printk(KERN_ERR PFX "abts: couldn't allocate cmd\n"); 868853e2bd2SBhanu Gollapudi rc = FAILED; 869853e2bd2SBhanu Gollapudi goto abts_err; 870853e2bd2SBhanu Gollapudi } 871853e2bd2SBhanu Gollapudi 872853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 873853e2bd2SBhanu Gollapudi abts_io_req->sc_cmd = NULL; 874853e2bd2SBhanu Gollapudi abts_io_req->port = port; 875853e2bd2SBhanu Gollapudi abts_io_req->tgt = tgt; 876853e2bd2SBhanu Gollapudi abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ 877853e2bd2SBhanu Gollapudi 878853e2bd2SBhanu Gollapudi abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); 879853e2bd2SBhanu Gollapudi memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); 880853e2bd2SBhanu Gollapudi 881853e2bd2SBhanu Gollapudi /* Fill FC header */ 882853e2bd2SBhanu Gollapudi fc_hdr = &(abts_req->req_fc_hdr); 883853e2bd2SBhanu Gollapudi 884853e2bd2SBhanu Gollapudi /* Obtain oxid and rxid for the original exchange to be aborted */ 885853e2bd2SBhanu Gollapudi fc_hdr->fh_ox_id = htons(io_req->xid); 886619c5cb6SVlad Zolotarov fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id); 887853e2bd2SBhanu Gollapudi 888853e2bd2SBhanu Gollapudi sid = tgt->sid; 889853e2bd2SBhanu Gollapudi did = rport->port_id; 890853e2bd2SBhanu Gollapudi 891853e2bd2SBhanu Gollapudi __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, 892853e2bd2SBhanu Gollapudi FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 893853e2bd2SBhanu Gollapudi FC_FC_SEQ_INIT, 0); 894853e2bd2SBhanu Gollapudi 895853e2bd2SBhanu Gollapudi xid = abts_io_req->xid; 896853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); 897853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 898853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 899853e2bd2SBhanu Gollapudi 900853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 901aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 902aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 903853e2bd2SBhanu Gollapudi task = &(task_page[index]); 904853e2bd2SBhanu Gollapudi bnx2fc_init_mp_task(abts_io_req, task); 905853e2bd2SBhanu Gollapudi 906853e2bd2SBhanu Gollapudi /* 907853e2bd2SBhanu Gollapudi * ABTS task is a temporary task that will be cleaned up 908853e2bd2SBhanu Gollapudi * irrespective of ABTS response. We need to start the timer 909853e2bd2SBhanu Gollapudi * for the original exchange, as the CQE is posted for the original 910853e2bd2SBhanu Gollapudi * IO request. 911853e2bd2SBhanu Gollapudi * 912853e2bd2SBhanu Gollapudi * Timer for ABTS is started only when it is originated by a 913853e2bd2SBhanu Gollapudi * TM request. For the ABTS issued as part of ULP timeout, 914853e2bd2SBhanu Gollapudi * scsi-ml maintains the timers. 915853e2bd2SBhanu Gollapudi */ 916853e2bd2SBhanu Gollapudi 917853e2bd2SBhanu Gollapudi /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ 918853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); 919853e2bd2SBhanu Gollapudi 920853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 921853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 922853e2bd2SBhanu Gollapudi 923853e2bd2SBhanu Gollapudi /* Ring doorbell */ 924853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 925853e2bd2SBhanu Gollapudi 926853e2bd2SBhanu Gollapudi abts_err: 927853e2bd2SBhanu Gollapudi return rc; 928853e2bd2SBhanu Gollapudi } 929853e2bd2SBhanu Gollapudi 9306c5a7ce4SBhanu Prakash Gollapudi int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset, 9316c5a7ce4SBhanu Prakash Gollapudi enum fc_rctl r_ctl) 9326c5a7ce4SBhanu Prakash Gollapudi { 9336c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = orig_io_req->tgt; 9346c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 9356c5a7ce4SBhanu Prakash Gollapudi struct fcoe_port *port; 9366c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_cmd *seq_clnp_req; 9376c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task; 9386c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task_page; 9396c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_els_cb_arg *cb_arg = NULL; 9406c5a7ce4SBhanu Prakash Gollapudi int task_idx, index; 9416c5a7ce4SBhanu Prakash Gollapudi u16 xid; 9426c5a7ce4SBhanu Prakash Gollapudi int rc = 0; 9436c5a7ce4SBhanu Prakash Gollapudi 9446c5a7ce4SBhanu Prakash Gollapudi BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n", 9456c5a7ce4SBhanu Prakash Gollapudi orig_io_req->xid); 9466c5a7ce4SBhanu Prakash Gollapudi kref_get(&orig_io_req->refcount); 9476c5a7ce4SBhanu Prakash Gollapudi 9486c5a7ce4SBhanu Prakash Gollapudi port = orig_io_req->port; 9496c5a7ce4SBhanu Prakash Gollapudi interface = port->priv; 9506c5a7ce4SBhanu Prakash Gollapudi 9516c5a7ce4SBhanu Prakash Gollapudi cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); 9526c5a7ce4SBhanu Prakash Gollapudi if (!cb_arg) { 9536c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n"); 9546c5a7ce4SBhanu Prakash Gollapudi rc = -ENOMEM; 9556c5a7ce4SBhanu Prakash Gollapudi goto cleanup_err; 9566c5a7ce4SBhanu Prakash Gollapudi } 9576c5a7ce4SBhanu Prakash Gollapudi 9586c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP); 9596c5a7ce4SBhanu Prakash Gollapudi if (!seq_clnp_req) { 960886a0b54SColin Ian King printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n"); 9616c5a7ce4SBhanu Prakash Gollapudi rc = -ENOMEM; 9626c5a7ce4SBhanu Prakash Gollapudi kfree(cb_arg); 9636c5a7ce4SBhanu Prakash Gollapudi goto cleanup_err; 9646c5a7ce4SBhanu Prakash Gollapudi } 9656c5a7ce4SBhanu Prakash Gollapudi /* Initialize rest of io_req fields */ 9666c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->sc_cmd = NULL; 9676c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->port = port; 9686c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->tgt = tgt; 9696c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */ 9706c5a7ce4SBhanu Prakash Gollapudi 9716c5a7ce4SBhanu Prakash Gollapudi xid = seq_clnp_req->xid; 9726c5a7ce4SBhanu Prakash Gollapudi 9736c5a7ce4SBhanu Prakash Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 9746c5a7ce4SBhanu Prakash Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 9756c5a7ce4SBhanu Prakash Gollapudi 9766c5a7ce4SBhanu Prakash Gollapudi /* Initialize task context for this IO request */ 9776c5a7ce4SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 9786c5a7ce4SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 9796c5a7ce4SBhanu Prakash Gollapudi task = &(task_page[index]); 9806c5a7ce4SBhanu Prakash Gollapudi cb_arg->aborted_io_req = orig_io_req; 9816c5a7ce4SBhanu Prakash Gollapudi cb_arg->io_req = seq_clnp_req; 9826c5a7ce4SBhanu Prakash Gollapudi cb_arg->r_ctl = r_ctl; 9836c5a7ce4SBhanu Prakash Gollapudi cb_arg->offset = offset; 9846c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->cb_arg = cb_arg; 9856c5a7ce4SBhanu Prakash Gollapudi 9866c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "call init_seq_cleanup_task\n"); 9876c5a7ce4SBhanu Prakash Gollapudi bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset); 9886c5a7ce4SBhanu Prakash Gollapudi 9896c5a7ce4SBhanu Prakash Gollapudi /* Obtain free SQ entry */ 9906c5a7ce4SBhanu Prakash Gollapudi bnx2fc_add_2_sq(tgt, xid); 9916c5a7ce4SBhanu Prakash Gollapudi 9926c5a7ce4SBhanu Prakash Gollapudi /* Ring doorbell */ 9936c5a7ce4SBhanu Prakash Gollapudi bnx2fc_ring_doorbell(tgt); 9946c5a7ce4SBhanu Prakash Gollapudi cleanup_err: 9956c5a7ce4SBhanu Prakash Gollapudi return rc; 9966c5a7ce4SBhanu Prakash Gollapudi } 9976c5a7ce4SBhanu Prakash Gollapudi 998853e2bd2SBhanu Gollapudi int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) 999853e2bd2SBhanu Gollapudi { 1000853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1001aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface; 1002853e2bd2SBhanu Gollapudi struct fcoe_port *port; 1003853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *cleanup_io_req; 1004853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 1005853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 1006853e2bd2SBhanu Gollapudi int task_idx, index; 1007853e2bd2SBhanu Gollapudi u16 xid, orig_xid; 1008853e2bd2SBhanu Gollapudi int rc = 0; 1009853e2bd2SBhanu Gollapudi 1010853e2bd2SBhanu Gollapudi /* ASSUMPTION: called with tgt_lock held */ 1011853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); 1012853e2bd2SBhanu Gollapudi 1013853e2bd2SBhanu Gollapudi port = io_req->port; 1014aea71a02SBhanu Prakash Gollapudi interface = port->priv; 1015853e2bd2SBhanu Gollapudi 1016853e2bd2SBhanu Gollapudi cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); 1017853e2bd2SBhanu Gollapudi if (!cleanup_io_req) { 1018886a0b54SColin Ian King printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n"); 1019853e2bd2SBhanu Gollapudi rc = -1; 1020853e2bd2SBhanu Gollapudi goto cleanup_err; 1021853e2bd2SBhanu Gollapudi } 1022853e2bd2SBhanu Gollapudi 1023853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 1024853e2bd2SBhanu Gollapudi cleanup_io_req->sc_cmd = NULL; 1025853e2bd2SBhanu Gollapudi cleanup_io_req->port = port; 1026853e2bd2SBhanu Gollapudi cleanup_io_req->tgt = tgt; 1027853e2bd2SBhanu Gollapudi cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ 1028853e2bd2SBhanu Gollapudi 1029853e2bd2SBhanu Gollapudi xid = cleanup_io_req->xid; 1030853e2bd2SBhanu Gollapudi 1031853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE; 1032853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 1033853e2bd2SBhanu Gollapudi 1034853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 1035aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *) 1036aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx]; 1037853e2bd2SBhanu Gollapudi task = &(task_page[index]); 1038853e2bd2SBhanu Gollapudi orig_xid = io_req->xid; 1039853e2bd2SBhanu Gollapudi 1040853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); 1041853e2bd2SBhanu Gollapudi 1042853e2bd2SBhanu Gollapudi bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); 1043853e2bd2SBhanu Gollapudi 1044853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 1045853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 1046853e2bd2SBhanu Gollapudi 104725ad7394SSaurav Kashyap /* Set flag that cleanup request is pending with the firmware */ 104825ad7394SSaurav Kashyap set_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags); 104925ad7394SSaurav Kashyap 1050853e2bd2SBhanu Gollapudi /* Ring doorbell */ 1051853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 1052853e2bd2SBhanu Gollapudi 1053853e2bd2SBhanu Gollapudi cleanup_err: 1054853e2bd2SBhanu Gollapudi return rc; 1055853e2bd2SBhanu Gollapudi } 1056853e2bd2SBhanu Gollapudi 1057853e2bd2SBhanu Gollapudi /** 1058853e2bd2SBhanu Gollapudi * bnx2fc_eh_target_reset: Reset a target 1059853e2bd2SBhanu Gollapudi * 1060853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI command 1061853e2bd2SBhanu Gollapudi * 1062853e2bd2SBhanu Gollapudi * Set from SCSI host template to send task mgmt command to the target 1063853e2bd2SBhanu Gollapudi * and wait for the response 1064853e2bd2SBhanu Gollapudi */ 1065853e2bd2SBhanu Gollapudi int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) 1066853e2bd2SBhanu Gollapudi { 1067853e2bd2SBhanu Gollapudi return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); 1068853e2bd2SBhanu Gollapudi } 1069853e2bd2SBhanu Gollapudi 1070853e2bd2SBhanu Gollapudi /** 1071853e2bd2SBhanu Gollapudi * bnx2fc_eh_device_reset - Reset a single LUN 1072853e2bd2SBhanu Gollapudi * 1073853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI command 1074853e2bd2SBhanu Gollapudi * 1075853e2bd2SBhanu Gollapudi * Set from SCSI host template to send task mgmt command to the target 1076853e2bd2SBhanu Gollapudi * and wait for the response 1077853e2bd2SBhanu Gollapudi */ 1078853e2bd2SBhanu Gollapudi int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) 1079853e2bd2SBhanu Gollapudi { 1080853e2bd2SBhanu Gollapudi return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); 1081853e2bd2SBhanu Gollapudi } 1082853e2bd2SBhanu Gollapudi 10833f7d67daSBaoyou Xie static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req) 1084bc834e07SJules Irenge __must_hold(&tgt->tgt_lock) 1085c1bb4f33SBhanu Prakash Gollapudi { 1086c1bb4f33SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1087faae19beSChad Dupuis unsigned int time_left; 1088c1bb4f33SBhanu Prakash Gollapudi 10890e0fcef9SSaurav Kashyap init_completion(&io_req->cleanup_done); 10900e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 1; 1091c1bb4f33SBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req); 1092c1bb4f33SBhanu Prakash Gollapudi 1093c1bb4f33SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1094c1bb4f33SBhanu Prakash Gollapudi 1095c1bb4f33SBhanu Prakash Gollapudi /* 1096faae19beSChad Dupuis * Can't wait forever on cleanup response lest we let the SCSI error 1097faae19beSChad Dupuis * handler wait forever 1098faae19beSChad Dupuis */ 10990e0fcef9SSaurav Kashyap time_left = wait_for_completion_timeout(&io_req->cleanup_done, 1100faae19beSChad Dupuis BNX2FC_FW_TIMEOUT); 1101a92ac6eeSChad Dupuis if (!time_left) { 1102faae19beSChad Dupuis BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n", 1103faae19beSChad Dupuis __func__); 1104faae19beSChad Dupuis 1105faae19beSChad Dupuis /* 1106a92ac6eeSChad Dupuis * Put the extra reference to the SCSI command since it would 1107a92ac6eeSChad Dupuis * not have been returned in this case. 1108c1bb4f33SBhanu Prakash Gollapudi */ 1109c1bb4f33SBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1110a92ac6eeSChad Dupuis } 1111c1bb4f33SBhanu Prakash Gollapudi 1112c1bb4f33SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 11130e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 0; 11149e29a682SDing Xiang return SUCCESS; 1115c1bb4f33SBhanu Prakash Gollapudi } 1116faae19beSChad Dupuis 1117853e2bd2SBhanu Gollapudi /** 1118853e2bd2SBhanu Gollapudi * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding 1119853e2bd2SBhanu Gollapudi * SCSI command 1120853e2bd2SBhanu Gollapudi * 1121853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI_ML command pointer 1122853e2bd2SBhanu Gollapudi * 1123853e2bd2SBhanu Gollapudi * SCSI abort request handler 1124853e2bd2SBhanu Gollapudi */ 1125853e2bd2SBhanu Gollapudi int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) 1126853e2bd2SBhanu Gollapudi { 1127853e2bd2SBhanu Gollapudi struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1128853e2bd2SBhanu Gollapudi struct fc_rport_libfc_priv *rp = rport->dd_data; 1129853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 1130853e2bd2SBhanu Gollapudi struct fc_lport *lport; 1131853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt; 1132617757deSMaurizio Lombardi int rc; 1133faae19beSChad Dupuis unsigned int time_left; 1134853e2bd2SBhanu Gollapudi 1135853e2bd2SBhanu Gollapudi rc = fc_block_scsi_eh(sc_cmd); 1136853e2bd2SBhanu Gollapudi if (rc) 1137853e2bd2SBhanu Gollapudi return rc; 1138853e2bd2SBhanu Gollapudi 1139853e2bd2SBhanu Gollapudi lport = shost_priv(sc_cmd->device->host); 1140853e2bd2SBhanu Gollapudi if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1141b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: link not ready\n"); 1142617757deSMaurizio Lombardi return FAILED; 1143853e2bd2SBhanu Gollapudi } 1144853e2bd2SBhanu Gollapudi 1145853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1]; 1146853e2bd2SBhanu Gollapudi 1147853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); 1148853e2bd2SBhanu Gollapudi 1149853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 1150853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr; 1151853e2bd2SBhanu Gollapudi if (!io_req) { 1152853e2bd2SBhanu Gollapudi /* Command might have just completed */ 1153853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); 1154853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1155853e2bd2SBhanu Gollapudi return SUCCESS; 1156853e2bd2SBhanu Gollapudi } 1157853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", 11582c935bc5SPeter Zijlstra kref_read(&io_req->refcount)); 1159853e2bd2SBhanu Gollapudi 1160853e2bd2SBhanu Gollapudi /* Hold IO request across abort processing */ 1161853e2bd2SBhanu Gollapudi kref_get(&io_req->refcount); 1162853e2bd2SBhanu Gollapudi 1163853e2bd2SBhanu Gollapudi BUG_ON(tgt != io_req->tgt); 1164853e2bd2SBhanu Gollapudi 1165853e2bd2SBhanu Gollapudi /* Remove the io_req from the active_q. */ 1166853e2bd2SBhanu Gollapudi /* 1167853e2bd2SBhanu Gollapudi * Task Mgmt functions (LUN RESET & TGT RESET) will not 1168853e2bd2SBhanu Gollapudi * issue an ABTS on this particular IO req, as the 1169853e2bd2SBhanu Gollapudi * io_req is no longer in the active_q. 1170853e2bd2SBhanu Gollapudi */ 1171853e2bd2SBhanu Gollapudi if (tgt->flush_in_prog) { 1172b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1173853e2bd2SBhanu Gollapudi "flush in progress\n", io_req->xid); 1174853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1175853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1176853e2bd2SBhanu Gollapudi return SUCCESS; 1177853e2bd2SBhanu Gollapudi } 1178853e2bd2SBhanu Gollapudi 1179853e2bd2SBhanu Gollapudi if (io_req->on_active_queue == 0) { 1180b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1181853e2bd2SBhanu Gollapudi "not on active_q\n", io_req->xid); 1182853e2bd2SBhanu Gollapudi /* 11835c63daf6SChad Dupuis * The IO is still with the FW. 11845c63daf6SChad Dupuis * Return failure and let SCSI-ml retry eh_abort. 1185853e2bd2SBhanu Gollapudi */ 1186853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 11875c63daf6SChad Dupuis return FAILED; 1188853e2bd2SBhanu Gollapudi } 1189853e2bd2SBhanu Gollapudi 1190853e2bd2SBhanu Gollapudi /* 1191853e2bd2SBhanu Gollapudi * Only eh_abort processing will remove the IO from 1192853e2bd2SBhanu Gollapudi * active_cmd_q before processing the request. this is 1193853e2bd2SBhanu Gollapudi * done to avoid race conditions between IOs aborted 1194853e2bd2SBhanu Gollapudi * as part of task management completion and eh_abort 1195853e2bd2SBhanu Gollapudi * processing 1196853e2bd2SBhanu Gollapudi */ 1197853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1198853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0; 1199853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */ 1200853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue); 1201853e2bd2SBhanu Gollapudi 12020e0fcef9SSaurav Kashyap init_completion(&io_req->abts_done); 12030e0fcef9SSaurav Kashyap init_completion(&io_req->cleanup_done); 1204853e2bd2SBhanu Gollapudi 1205c1bb4f33SBhanu Prakash Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 1206b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1207853e2bd2SBhanu Gollapudi "already in abts processing\n", io_req->xid); 120899cc600cSBhanu Prakash Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 120999cc600cSBhanu Prakash Gollapudi kref_put(&io_req->refcount, 121099cc600cSBhanu Prakash Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1211faae19beSChad Dupuis /* 1212faae19beSChad Dupuis * We don't want to hold off the upper layer timer so simply 1213faae19beSChad Dupuis * cleanup the command and return that I/O was successfully 1214faae19beSChad Dupuis * aborted. 1215faae19beSChad Dupuis */ 121650a87414SChad Dupuis rc = bnx2fc_abts_cleanup(io_req); 121721837896SEddie Wai /* This only occurs when an task abort was requested while ABTS 121821837896SEddie Wai is in progress. Setting the IO_CLEANUP flag will skip the 121921837896SEddie Wai RRQ process in the case when the fw generated SCSI_CMD cmpl 122021837896SEddie Wai was a result from the ABTS request rather than the CLEANUP 122121837896SEddie Wai request */ 122221837896SEddie Wai set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags); 1223faae19beSChad Dupuis goto done; 1224c1bb4f33SBhanu Prakash Gollapudi } 1225c1bb4f33SBhanu Prakash Gollapudi 1226c1bb4f33SBhanu Prakash Gollapudi /* Cancel the current timer running on this io_req */ 1227c1bb4f33SBhanu Prakash Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1228c1bb4f33SBhanu Prakash Gollapudi kref_put(&io_req->refcount, 1229c1bb4f33SBhanu Prakash Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1230c1bb4f33SBhanu Prakash Gollapudi set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); 12310e0fcef9SSaurav Kashyap io_req->wait_for_abts_comp = 1; 1232c1bb4f33SBhanu Prakash Gollapudi rc = bnx2fc_initiate_abts(io_req); 1233c1bb4f33SBhanu Prakash Gollapudi if (rc == FAILED) { 12340e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 1; 123599cc600cSBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req); 123699cc600cSBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 12370e0fcef9SSaurav Kashyap wait_for_completion(&io_req->cleanup_done); 123899cc600cSBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 12390e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 0; 1240c1bb4f33SBhanu Prakash Gollapudi goto done; 1241853e2bd2SBhanu Gollapudi } 1242853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1243853e2bd2SBhanu Gollapudi 1244faae19beSChad Dupuis /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */ 12450e0fcef9SSaurav Kashyap time_left = wait_for_completion_timeout(&io_req->abts_done, 124665309ef6SLaurence Oberman msecs_to_jiffies(2 * rp->r_a_tov + 1)); 1247faae19beSChad Dupuis if (time_left) 12480e0fcef9SSaurav Kashyap BNX2FC_IO_DBG(io_req, 12490e0fcef9SSaurav Kashyap "Timed out in eh_abort waiting for abts_done"); 1250853e2bd2SBhanu Gollapudi 1251853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock); 12520e0fcef9SSaurav Kashyap io_req->wait_for_abts_comp = 0; 12535d78f175SBhanu Prakash Gollapudi if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 12545d78f175SBhanu Prakash Gollapudi BNX2FC_IO_DBG(io_req, "IO completed in a different context\n"); 12555d78f175SBhanu Prakash Gollapudi rc = SUCCESS; 12565d78f175SBhanu Prakash Gollapudi } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1257853e2bd2SBhanu Gollapudi &io_req->req_flags))) { 1258853e2bd2SBhanu Gollapudi /* Let the scsi-ml try to recover this command */ 1259853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", 1260853e2bd2SBhanu Gollapudi io_req->xid); 1261faae19beSChad Dupuis /* 1262faae19beSChad Dupuis * Cleanup firmware residuals before returning control back 1263faae19beSChad Dupuis * to SCSI ML. 1264faae19beSChad Dupuis */ 126550a87414SChad Dupuis rc = bnx2fc_abts_cleanup(io_req); 1266faae19beSChad Dupuis goto done; 1267853e2bd2SBhanu Gollapudi } else { 1268853e2bd2SBhanu Gollapudi /* 1269853e2bd2SBhanu Gollapudi * We come here even when there was a race condition 1270853e2bd2SBhanu Gollapudi * between timeout and abts completion, and abts 1271853e2bd2SBhanu Gollapudi * completion happens just in time. 1272853e2bd2SBhanu Gollapudi */ 1273853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "abort succeeded\n"); 1274853e2bd2SBhanu Gollapudi rc = SUCCESS; 1275853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ABORT); 1276853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1277853e2bd2SBhanu Gollapudi } 1278c1bb4f33SBhanu Prakash Gollapudi done: 1279853e2bd2SBhanu Gollapudi /* release the reference taken in eh_abort */ 1280853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1281853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock); 1282853e2bd2SBhanu Gollapudi return rc; 1283853e2bd2SBhanu Gollapudi } 1284853e2bd2SBhanu Gollapudi 12856c5a7ce4SBhanu Prakash Gollapudi void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req, 12866c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task, 12876c5a7ce4SBhanu Prakash Gollapudi u8 rx_state) 12886c5a7ce4SBhanu Prakash Gollapudi { 12896c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg; 12906c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req; 12916c5a7ce4SBhanu Prakash Gollapudi u32 offset = cb_arg->offset; 12926c5a7ce4SBhanu Prakash Gollapudi enum fc_rctl r_ctl = cb_arg->r_ctl; 12936c5a7ce4SBhanu Prakash Gollapudi int rc = 0; 12946c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = orig_io_req->tgt; 12956c5a7ce4SBhanu Prakash Gollapudi 12966c5a7ce4SBhanu Prakash Gollapudi BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x" 12976c5a7ce4SBhanu Prakash Gollapudi "cmd_type = %d\n", 12986c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->xid, seq_clnp_req->cmd_type); 12996c5a7ce4SBhanu Prakash Gollapudi 13006c5a7ce4SBhanu Prakash Gollapudi if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) { 13016c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n", 13026c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->xid); 13036c5a7ce4SBhanu Prakash Gollapudi goto free_cb_arg; 13046c5a7ce4SBhanu Prakash Gollapudi } 13056c5a7ce4SBhanu Prakash Gollapudi 13066c5a7ce4SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock); 13076c5a7ce4SBhanu Prakash Gollapudi rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); 13086c5a7ce4SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock); 13096c5a7ce4SBhanu Prakash Gollapudi 13106c5a7ce4SBhanu Prakash Gollapudi if (rc) 13116c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "clnup_compl: Unable to send SRR" 13126c5a7ce4SBhanu Prakash Gollapudi " IO will abort\n"); 13136c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->cb_arg = NULL; 13146c5a7ce4SBhanu Prakash Gollapudi kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); 13156c5a7ce4SBhanu Prakash Gollapudi free_cb_arg: 13166c5a7ce4SBhanu Prakash Gollapudi kfree(cb_arg); 13176c5a7ce4SBhanu Prakash Gollapudi return; 13186c5a7ce4SBhanu Prakash Gollapudi } 13196c5a7ce4SBhanu Prakash Gollapudi 1320853e2bd2SBhanu Gollapudi void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, 1321853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, 1322853e2bd2SBhanu Gollapudi u8 num_rq) 1323853e2bd2SBhanu Gollapudi { 1324853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " 1325853e2bd2SBhanu Gollapudi "refcnt = %d, cmd_type = %d\n", 13262c935bc5SPeter Zijlstra kref_read(&io_req->refcount), io_req->cmd_type); 132725ad7394SSaurav Kashyap /* 132825ad7394SSaurav Kashyap * Test whether there is a cleanup request pending. If not just 132925ad7394SSaurav Kashyap * exit. 133025ad7394SSaurav Kashyap */ 133125ad7394SSaurav Kashyap if (!test_and_clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, 133225ad7394SSaurav Kashyap &io_req->req_flags)) 133325ad7394SSaurav Kashyap return; 133425ad7394SSaurav Kashyap /* 133525ad7394SSaurav Kashyap * If we receive a cleanup completion for this request then the 133625ad7394SSaurav Kashyap * firmware will not give us an abort completion for this request 133725ad7394SSaurav Kashyap * so clear any ABTS pending flags. 133825ad7394SSaurav Kashyap */ 133925ad7394SSaurav Kashyap if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags) && 134025ad7394SSaurav Kashyap !test_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags)) { 134125ad7394SSaurav Kashyap set_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags); 134225ad7394SSaurav Kashyap if (io_req->wait_for_abts_comp) 134325ad7394SSaurav Kashyap complete(&io_req->abts_done); 134425ad7394SSaurav Kashyap } 134525ad7394SSaurav Kashyap 1346853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ERROR); 1347853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 13480e0fcef9SSaurav Kashyap if (io_req->wait_for_cleanup_comp) 13490e0fcef9SSaurav Kashyap complete(&io_req->cleanup_done); 1350853e2bd2SBhanu Gollapudi } 1351853e2bd2SBhanu Gollapudi 1352853e2bd2SBhanu Gollapudi void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, 1353853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, 1354853e2bd2SBhanu Gollapudi u8 num_rq) 1355853e2bd2SBhanu Gollapudi { 1356853e2bd2SBhanu Gollapudi u32 r_ctl; 1357853e2bd2SBhanu Gollapudi u32 r_a_tov = FC_DEF_R_A_TOV; 1358853e2bd2SBhanu Gollapudi u8 issue_rrq = 0; 1359853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1360853e2bd2SBhanu Gollapudi 1361853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" 1362853e2bd2SBhanu Gollapudi "refcnt = %d, cmd_type = %d\n", 1363853e2bd2SBhanu Gollapudi io_req->xid, 13642c935bc5SPeter Zijlstra kref_read(&io_req->refcount), io_req->cmd_type); 1365853e2bd2SBhanu Gollapudi 1366853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1367853e2bd2SBhanu Gollapudi &io_req->req_flags)) { 1368853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Timer context finished processing" 1369853e2bd2SBhanu Gollapudi " this io\n"); 1370853e2bd2SBhanu Gollapudi return; 1371853e2bd2SBhanu Gollapudi } 1372853e2bd2SBhanu Gollapudi 137325ad7394SSaurav Kashyap /* 137425ad7394SSaurav Kashyap * If we receive an ABTS completion here then we will not receive 137525ad7394SSaurav Kashyap * a cleanup completion so clear any cleanup pending flags. 137625ad7394SSaurav Kashyap */ 137725ad7394SSaurav Kashyap if (test_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags)) { 137825ad7394SSaurav Kashyap clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags); 137925ad7394SSaurav Kashyap if (io_req->wait_for_cleanup_comp) 138025ad7394SSaurav Kashyap complete(&io_req->cleanup_done); 138125ad7394SSaurav Kashyap } 138225ad7394SSaurav Kashyap 1383853e2bd2SBhanu Gollapudi /* Do not issue RRQ as this IO is already cleanedup */ 1384853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, 1385853e2bd2SBhanu Gollapudi &io_req->req_flags)) 1386853e2bd2SBhanu Gollapudi goto io_compl; 1387853e2bd2SBhanu Gollapudi 1388853e2bd2SBhanu Gollapudi /* 1389853e2bd2SBhanu Gollapudi * For ABTS issued due to SCSI eh_abort_handler, timeout 1390853e2bd2SBhanu Gollapudi * values are maintained by scsi-ml itself. Cancel timeout 1391853e2bd2SBhanu Gollapudi * in case ABTS issued as part of task management function 1392853e2bd2SBhanu Gollapudi * or due to FW error. 1393853e2bd2SBhanu Gollapudi */ 1394853e2bd2SBhanu Gollapudi if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) 1395853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1396853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1397853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1398853e2bd2SBhanu Gollapudi 1399619c5cb6SVlad Zolotarov r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl; 1400853e2bd2SBhanu Gollapudi 1401853e2bd2SBhanu Gollapudi switch (r_ctl) { 1402853e2bd2SBhanu Gollapudi case FC_RCTL_BA_ACC: 1403853e2bd2SBhanu Gollapudi /* 1404853e2bd2SBhanu Gollapudi * Dont release this cmd yet. It will be relesed 1405853e2bd2SBhanu Gollapudi * after we get RRQ response 1406853e2bd2SBhanu Gollapudi */ 1407853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); 1408853e2bd2SBhanu Gollapudi issue_rrq = 1; 1409853e2bd2SBhanu Gollapudi break; 1410853e2bd2SBhanu Gollapudi 1411853e2bd2SBhanu Gollapudi case FC_RCTL_BA_RJT: 1412853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); 1413853e2bd2SBhanu Gollapudi break; 1414853e2bd2SBhanu Gollapudi default: 1415853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Unknown ABTS response\n"); 1416853e2bd2SBhanu Gollapudi break; 1417853e2bd2SBhanu Gollapudi } 1418853e2bd2SBhanu Gollapudi 1419853e2bd2SBhanu Gollapudi if (issue_rrq) { 1420853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); 1421853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); 1422853e2bd2SBhanu Gollapudi } 1423853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 1424853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, r_a_tov); 1425853e2bd2SBhanu Gollapudi 1426853e2bd2SBhanu Gollapudi io_compl: 14270e0fcef9SSaurav Kashyap if (io_req->wait_for_abts_comp) { 1428853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1429853e2bd2SBhanu Gollapudi &io_req->req_flags)) 14300e0fcef9SSaurav Kashyap complete(&io_req->abts_done); 1431853e2bd2SBhanu Gollapudi } else { 1432853e2bd2SBhanu Gollapudi /* 1433853e2bd2SBhanu Gollapudi * We end up here when ABTS is issued as 1434853e2bd2SBhanu Gollapudi * in asynchronous context, i.e., as part 1435853e2bd2SBhanu Gollapudi * of task management completion, or 1436853e2bd2SBhanu Gollapudi * when FW error is received or when the 1437853e2bd2SBhanu Gollapudi * ABTS is issued when the IO is timed 1438853e2bd2SBhanu Gollapudi * out. 1439853e2bd2SBhanu Gollapudi */ 1440853e2bd2SBhanu Gollapudi 1441853e2bd2SBhanu Gollapudi if (io_req->on_active_queue) { 1442853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1443853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0; 1444853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */ 1445853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue); 1446853e2bd2SBhanu Gollapudi } 1447853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ERROR); 1448853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 1449853e2bd2SBhanu Gollapudi } 1450853e2bd2SBhanu Gollapudi } 1451853e2bd2SBhanu Gollapudi 1452853e2bd2SBhanu Gollapudi static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) 1453853e2bd2SBhanu Gollapudi { 1454853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1455853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1456d71fb3bdSBhanu Prakash Gollapudi struct bnx2fc_cmd *cmd, *tmp; 14579cb78c16SHannes Reinecke u64 tm_lun = sc_cmd->device->lun; 14589cb78c16SHannes Reinecke u64 lun; 1459853e2bd2SBhanu Gollapudi int rc = 0; 1460853e2bd2SBhanu Gollapudi 1461853e2bd2SBhanu Gollapudi /* called with tgt_lock held */ 1462853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n"); 1463853e2bd2SBhanu Gollapudi /* 1464853e2bd2SBhanu Gollapudi * Walk thru the active_ios queue and ABORT the IO 1465853e2bd2SBhanu Gollapudi * that matches with the LUN that was reset 1466853e2bd2SBhanu Gollapudi */ 1467d71fb3bdSBhanu Prakash Gollapudi list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { 1468853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n"); 1469853e2bd2SBhanu Gollapudi lun = cmd->sc_cmd->device->lun; 1470853e2bd2SBhanu Gollapudi if (lun == tm_lun) { 1471853e2bd2SBhanu Gollapudi /* Initiate ABTS on this cmd */ 1472853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1473853e2bd2SBhanu Gollapudi &cmd->req_flags)) { 1474853e2bd2SBhanu Gollapudi /* cancel the IO timeout */ 1475853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1476853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1477853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); 1478853e2bd2SBhanu Gollapudi /* timer hold */ 1479853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(cmd); 148025985edcSLucas De Marchi /* abts shouldn't fail in this context */ 1481853e2bd2SBhanu Gollapudi WARN_ON(rc != SUCCESS); 1482853e2bd2SBhanu Gollapudi } else 1483853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "lun_rst: abts already in" 1484853e2bd2SBhanu Gollapudi " progress for this IO 0x%x\n", 1485853e2bd2SBhanu Gollapudi cmd->xid); 1486853e2bd2SBhanu Gollapudi } 1487853e2bd2SBhanu Gollapudi } 1488853e2bd2SBhanu Gollapudi } 1489853e2bd2SBhanu Gollapudi 1490853e2bd2SBhanu Gollapudi static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) 1491853e2bd2SBhanu Gollapudi { 1492853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1493d71fb3bdSBhanu Prakash Gollapudi struct bnx2fc_cmd *cmd, *tmp; 1494853e2bd2SBhanu Gollapudi int rc = 0; 1495853e2bd2SBhanu Gollapudi 1496853e2bd2SBhanu Gollapudi /* called with tgt_lock held */ 1497853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); 1498853e2bd2SBhanu Gollapudi /* 1499853e2bd2SBhanu Gollapudi * Walk thru the active_ios queue and ABORT the IO 1500853e2bd2SBhanu Gollapudi * that matches with the LUN that was reset 1501853e2bd2SBhanu Gollapudi */ 1502d71fb3bdSBhanu Prakash Gollapudi list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { 1503853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); 1504853e2bd2SBhanu Gollapudi /* Initiate ABTS */ 1505853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1506853e2bd2SBhanu Gollapudi &cmd->req_flags)) { 1507853e2bd2SBhanu Gollapudi /* cancel the IO timeout */ 1508853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1509853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1510853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* timer hold */ 1511853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(cmd); 151225985edcSLucas De Marchi /* abts shouldn't fail in this context */ 1513853e2bd2SBhanu Gollapudi WARN_ON(rc != SUCCESS); 1514853e2bd2SBhanu Gollapudi 1515853e2bd2SBhanu Gollapudi } else 1516853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tgt_rst: abts already in progress" 1517853e2bd2SBhanu Gollapudi " for this IO 0x%x\n", cmd->xid); 1518853e2bd2SBhanu Gollapudi } 1519853e2bd2SBhanu Gollapudi } 1520853e2bd2SBhanu Gollapudi 1521853e2bd2SBhanu Gollapudi void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, 152277331115SJaved Hasan struct fcoe_task_ctx_entry *task, u8 num_rq, 152377331115SJaved Hasan unsigned char *rq_data) 1524853e2bd2SBhanu Gollapudi { 1525853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *tm_req; 1526853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr; 1527853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1528853e2bd2SBhanu Gollapudi u64 *hdr; 1529853e2bd2SBhanu Gollapudi u64 *temp_hdr; 1530853e2bd2SBhanu Gollapudi void *rsp_buf; 1531853e2bd2SBhanu Gollapudi 1532853e2bd2SBhanu Gollapudi /* Called with tgt_lock held */ 1533853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); 1534853e2bd2SBhanu Gollapudi 1535853e2bd2SBhanu Gollapudi if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) 1536853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); 1537853e2bd2SBhanu Gollapudi else { 1538853e2bd2SBhanu Gollapudi /* TM has already timed out and we got 1539853e2bd2SBhanu Gollapudi * delayed completion. Ignore completion 1540853e2bd2SBhanu Gollapudi * processing. 1541853e2bd2SBhanu Gollapudi */ 1542853e2bd2SBhanu Gollapudi return; 1543853e2bd2SBhanu Gollapudi } 1544853e2bd2SBhanu Gollapudi 1545853e2bd2SBhanu Gollapudi tm_req = &(io_req->mp_req); 1546853e2bd2SBhanu Gollapudi fc_hdr = &(tm_req->resp_fc_hdr); 1547853e2bd2SBhanu Gollapudi hdr = (u64 *)fc_hdr; 1548853e2bd2SBhanu Gollapudi temp_hdr = (u64 *) 1549619c5cb6SVlad Zolotarov &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; 1550853e2bd2SBhanu Gollapudi hdr[0] = cpu_to_be64(temp_hdr[0]); 1551853e2bd2SBhanu Gollapudi hdr[1] = cpu_to_be64(temp_hdr[1]); 1552853e2bd2SBhanu Gollapudi hdr[2] = cpu_to_be64(temp_hdr[2]); 1553853e2bd2SBhanu Gollapudi 1554619c5cb6SVlad Zolotarov tm_req->resp_len = 1555619c5cb6SVlad Zolotarov task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; 1556853e2bd2SBhanu Gollapudi 1557853e2bd2SBhanu Gollapudi rsp_buf = tm_req->resp_buf; 1558853e2bd2SBhanu Gollapudi 1559853e2bd2SBhanu Gollapudi if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { 1560853e2bd2SBhanu Gollapudi bnx2fc_parse_fcp_rsp(io_req, 1561853e2bd2SBhanu Gollapudi (struct fcoe_fcp_rsp_payload *) 156277331115SJaved Hasan rsp_buf, num_rq, rq_data); 1563853e2bd2SBhanu Gollapudi if (io_req->fcp_rsp_code == 0) { 1564853e2bd2SBhanu Gollapudi /* TM successful */ 1565853e2bd2SBhanu Gollapudi if (tm_req->tm_flags & FCP_TMF_LUN_RESET) 1566853e2bd2SBhanu Gollapudi bnx2fc_lun_reset_cmpl(io_req); 1567853e2bd2SBhanu Gollapudi else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) 1568853e2bd2SBhanu Gollapudi bnx2fc_tgt_reset_cmpl(io_req); 1569853e2bd2SBhanu Gollapudi } 1570853e2bd2SBhanu Gollapudi } else { 1571853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", 1572853e2bd2SBhanu Gollapudi fc_hdr->fh_r_ctl); 1573853e2bd2SBhanu Gollapudi } 1574853e2bd2SBhanu Gollapudi if (!sc_cmd->SCp.ptr) { 1575b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n"); 1576853e2bd2SBhanu Gollapudi return; 1577853e2bd2SBhanu Gollapudi } 1578853e2bd2SBhanu Gollapudi switch (io_req->fcp_status) { 1579853e2bd2SBhanu Gollapudi case FC_GOOD: 1580853e2bd2SBhanu Gollapudi if (io_req->cdb_status == 0) { 1581853e2bd2SBhanu Gollapudi /* Good IO completion */ 1582853e2bd2SBhanu Gollapudi sc_cmd->result = DID_OK << 16; 1583853e2bd2SBhanu Gollapudi } else { 1584853e2bd2SBhanu Gollapudi /* Transport status is good, SCSI status not good */ 1585853e2bd2SBhanu Gollapudi sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1586853e2bd2SBhanu Gollapudi } 1587853e2bd2SBhanu Gollapudi if (io_req->fcp_resid) 1588853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, io_req->fcp_resid); 1589853e2bd2SBhanu Gollapudi break; 1590853e2bd2SBhanu Gollapudi 1591853e2bd2SBhanu Gollapudi default: 1592853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", 1593853e2bd2SBhanu Gollapudi io_req->fcp_status); 1594853e2bd2SBhanu Gollapudi break; 1595853e2bd2SBhanu Gollapudi } 1596853e2bd2SBhanu Gollapudi 1597853e2bd2SBhanu Gollapudi sc_cmd = io_req->sc_cmd; 1598853e2bd2SBhanu Gollapudi io_req->sc_cmd = NULL; 1599853e2bd2SBhanu Gollapudi 1600853e2bd2SBhanu Gollapudi /* check if the io_req exists in tgt's tmf_q */ 1601853e2bd2SBhanu Gollapudi if (io_req->on_tmf_queue) { 1602853e2bd2SBhanu Gollapudi 1603853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1604853e2bd2SBhanu Gollapudi io_req->on_tmf_queue = 0; 1605853e2bd2SBhanu Gollapudi } else { 1606853e2bd2SBhanu Gollapudi 1607b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "Command not on active_cmd_queue!\n"); 1608853e2bd2SBhanu Gollapudi return; 1609853e2bd2SBhanu Gollapudi } 1610853e2bd2SBhanu Gollapudi 1611853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = NULL; 1612853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 1613853e2bd2SBhanu Gollapudi 1614853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 16150e0fcef9SSaurav Kashyap if (io_req->wait_for_abts_comp) { 1616853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); 16170e0fcef9SSaurav Kashyap complete(&io_req->abts_done); 1618853e2bd2SBhanu Gollapudi } 1619853e2bd2SBhanu Gollapudi } 1620853e2bd2SBhanu Gollapudi 1621853e2bd2SBhanu Gollapudi static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 1622853e2bd2SBhanu Gollapudi int bd_index) 1623853e2bd2SBhanu Gollapudi { 1624853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1625853e2bd2SBhanu Gollapudi int frag_size, sg_frags; 1626853e2bd2SBhanu Gollapudi 1627853e2bd2SBhanu Gollapudi sg_frags = 0; 1628853e2bd2SBhanu Gollapudi while (sg_len) { 1629853e2bd2SBhanu Gollapudi if (sg_len >= BNX2FC_BD_SPLIT_SZ) 1630853e2bd2SBhanu Gollapudi frag_size = BNX2FC_BD_SPLIT_SZ; 1631853e2bd2SBhanu Gollapudi else 1632853e2bd2SBhanu Gollapudi frag_size = sg_len; 1633853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; 1634853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; 1635853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_len = (u16)frag_size; 1636853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].flags = 0; 1637853e2bd2SBhanu Gollapudi 1638853e2bd2SBhanu Gollapudi addr += (u64) frag_size; 1639853e2bd2SBhanu Gollapudi sg_frags++; 1640853e2bd2SBhanu Gollapudi sg_len -= frag_size; 1641853e2bd2SBhanu Gollapudi } 1642853e2bd2SBhanu Gollapudi return sg_frags; 1643853e2bd2SBhanu Gollapudi 1644853e2bd2SBhanu Gollapudi } 1645853e2bd2SBhanu Gollapudi 1646853e2bd2SBhanu Gollapudi static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) 1647853e2bd2SBhanu Gollapudi { 16483ce41ea1SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv; 16493ce41ea1SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 1650853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd; 1651853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1652853e2bd2SBhanu Gollapudi struct scatterlist *sg; 1653853e2bd2SBhanu Gollapudi int byte_count = 0; 1654853e2bd2SBhanu Gollapudi int sg_count = 0; 1655853e2bd2SBhanu Gollapudi int bd_count = 0; 1656853e2bd2SBhanu Gollapudi int sg_frags; 1657853e2bd2SBhanu Gollapudi unsigned int sg_len; 1658853e2bd2SBhanu Gollapudi u64 addr; 1659853e2bd2SBhanu Gollapudi int i; 1660853e2bd2SBhanu Gollapudi 16613c97b569SSaurav Kashyap WARN_ON(scsi_sg_count(sc) > BNX2FC_MAX_BDS_PER_CMD); 16625565461eSChad Dupuis /* 16635565461eSChad Dupuis * Use dma_map_sg directly to ensure we're using the correct 16645565461eSChad Dupuis * dev struct off of pcidev. 16655565461eSChad Dupuis */ 16663ce41ea1SBhanu Prakash Gollapudi sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc), 16673ce41ea1SBhanu Prakash Gollapudi scsi_sg_count(sc), sc->sc_data_direction); 1668853e2bd2SBhanu Gollapudi scsi_for_each_sg(sc, sg, sg_count, i) { 1669853e2bd2SBhanu Gollapudi sg_len = sg_dma_len(sg); 1670853e2bd2SBhanu Gollapudi addr = sg_dma_address(sg); 1671853e2bd2SBhanu Gollapudi if (sg_len > BNX2FC_MAX_BD_LEN) { 1672853e2bd2SBhanu Gollapudi sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, 1673853e2bd2SBhanu Gollapudi bd_count); 1674853e2bd2SBhanu Gollapudi } else { 1675853e2bd2SBhanu Gollapudi 1676853e2bd2SBhanu Gollapudi sg_frags = 1; 1677853e2bd2SBhanu Gollapudi bd[bd_count].buf_addr_lo = addr & 0xffffffff; 1678853e2bd2SBhanu Gollapudi bd[bd_count].buf_addr_hi = addr >> 32; 1679853e2bd2SBhanu Gollapudi bd[bd_count].buf_len = (u16)sg_len; 1680853e2bd2SBhanu Gollapudi bd[bd_count].flags = 0; 1681853e2bd2SBhanu Gollapudi } 1682853e2bd2SBhanu Gollapudi bd_count += sg_frags; 1683853e2bd2SBhanu Gollapudi byte_count += sg_len; 1684853e2bd2SBhanu Gollapudi } 1685853e2bd2SBhanu Gollapudi if (byte_count != scsi_bufflen(sc)) 1686853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " 1687853e2bd2SBhanu Gollapudi "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), 1688853e2bd2SBhanu Gollapudi io_req->xid); 1689853e2bd2SBhanu Gollapudi return bd_count; 1690853e2bd2SBhanu Gollapudi } 1691853e2bd2SBhanu Gollapudi 1692822f2903SBhanu Prakash Gollapudi static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) 1693853e2bd2SBhanu Gollapudi { 1694853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd; 1695853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1696853e2bd2SBhanu Gollapudi int bd_count; 1697853e2bd2SBhanu Gollapudi 1698822f2903SBhanu Prakash Gollapudi if (scsi_sg_count(sc)) { 1699853e2bd2SBhanu Gollapudi bd_count = bnx2fc_map_sg(io_req); 1700822f2903SBhanu Prakash Gollapudi if (bd_count == 0) 1701822f2903SBhanu Prakash Gollapudi return -ENOMEM; 1702822f2903SBhanu Prakash Gollapudi } else { 1703853e2bd2SBhanu Gollapudi bd_count = 0; 1704853e2bd2SBhanu Gollapudi bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; 1705853e2bd2SBhanu Gollapudi bd[0].buf_len = bd[0].flags = 0; 1706853e2bd2SBhanu Gollapudi } 1707853e2bd2SBhanu Gollapudi io_req->bd_tbl->bd_valid = bd_count; 1708822f2903SBhanu Prakash Gollapudi 17093c97b569SSaurav Kashyap /* 17103c97b569SSaurav Kashyap * Return the command to ML if BD count exceeds the max number 17113c97b569SSaurav Kashyap * that can be handled by FW. 17123c97b569SSaurav Kashyap */ 17133c97b569SSaurav Kashyap if (bd_count > BNX2FC_FW_MAX_BDS_PER_CMD) { 17143c97b569SSaurav Kashyap pr_err("bd_count = %d exceeded FW supported max BD(255), task_id = 0x%x\n", 17153c97b569SSaurav Kashyap bd_count, io_req->xid); 17163c97b569SSaurav Kashyap return -ENOMEM; 17173c97b569SSaurav Kashyap } 17183c97b569SSaurav Kashyap 1719822f2903SBhanu Prakash Gollapudi return 0; 1720853e2bd2SBhanu Gollapudi } 1721853e2bd2SBhanu Gollapudi 1722853e2bd2SBhanu Gollapudi static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) 1723853e2bd2SBhanu Gollapudi { 1724853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd; 17255565461eSChad Dupuis struct bnx2fc_interface *interface = io_req->port->priv; 17265565461eSChad Dupuis struct bnx2fc_hba *hba = interface->hba; 1727853e2bd2SBhanu Gollapudi 17285565461eSChad Dupuis /* 17295565461eSChad Dupuis * Use dma_unmap_sg directly to ensure we're using the correct 17305565461eSChad Dupuis * dev struct off of pcidev. 17315565461eSChad Dupuis */ 17325565461eSChad Dupuis if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { 17335565461eSChad Dupuis dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc), 17345565461eSChad Dupuis scsi_sg_count(sc), sc->sc_data_direction); 1735853e2bd2SBhanu Gollapudi io_req->bd_tbl->bd_valid = 0; 1736853e2bd2SBhanu Gollapudi } 1737853e2bd2SBhanu Gollapudi } 1738853e2bd2SBhanu Gollapudi 1739853e2bd2SBhanu Gollapudi void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, 1740853e2bd2SBhanu Gollapudi struct fcp_cmnd *fcp_cmnd) 1741853e2bd2SBhanu Gollapudi { 1742853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1743853e2bd2SBhanu Gollapudi 1744853e2bd2SBhanu Gollapudi memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 1745853e2bd2SBhanu Gollapudi 1746e35fa8c2SAndy Grover int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun); 1747853e2bd2SBhanu Gollapudi 1748853e2bd2SBhanu Gollapudi fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); 1749853e2bd2SBhanu Gollapudi memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); 1750853e2bd2SBhanu Gollapudi 1751853e2bd2SBhanu Gollapudi fcp_cmnd->fc_cmdref = 0; 1752853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = 0; 1753853e2bd2SBhanu Gollapudi fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; 1754853e2bd2SBhanu Gollapudi fcp_cmnd->fc_flags = io_req->io_req_flags; 1755853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; 1756853e2bd2SBhanu Gollapudi } 1757853e2bd2SBhanu Gollapudi 1758853e2bd2SBhanu Gollapudi static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, 1759853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp, 176077331115SJaved Hasan u8 num_rq, unsigned char *rq_data) 1761853e2bd2SBhanu Gollapudi { 1762853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1763853e2bd2SBhanu Gollapudi u8 rsp_flags = fcp_rsp->fcp_flags.flags; 1764853e2bd2SBhanu Gollapudi u32 rq_buff_len = 0; 1765853e2bd2SBhanu Gollapudi int fcp_sns_len = 0; 1766853e2bd2SBhanu Gollapudi int fcp_rsp_len = 0; 1767853e2bd2SBhanu Gollapudi 1768853e2bd2SBhanu Gollapudi io_req->fcp_status = FC_GOOD; 1769adcf7dfbSChad Dupuis io_req->fcp_resid = 0; 1770adcf7dfbSChad Dupuis if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | 1771adcf7dfbSChad Dupuis FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) 1772853e2bd2SBhanu Gollapudi io_req->fcp_resid = fcp_rsp->fcp_resid; 1773853e2bd2SBhanu Gollapudi 1774853e2bd2SBhanu Gollapudi io_req->scsi_comp_flags = rsp_flags; 1775853e2bd2SBhanu Gollapudi CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = 1776853e2bd2SBhanu Gollapudi fcp_rsp->scsi_status_code; 1777853e2bd2SBhanu Gollapudi 1778853e2bd2SBhanu Gollapudi /* Fetch fcp_rsp_info and fcp_sns_info if available */ 1779853e2bd2SBhanu Gollapudi if (num_rq) { 1780853e2bd2SBhanu Gollapudi 1781853e2bd2SBhanu Gollapudi /* 1782853e2bd2SBhanu Gollapudi * We do not anticipate num_rq >1, as the linux defined 1783853e2bd2SBhanu Gollapudi * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO 1784853e2bd2SBhanu Gollapudi * 256 bytes of single rq buffer is good enough to hold this. 1785853e2bd2SBhanu Gollapudi */ 1786853e2bd2SBhanu Gollapudi 1787853e2bd2SBhanu Gollapudi if (rsp_flags & 1788853e2bd2SBhanu Gollapudi FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { 1789853e2bd2SBhanu Gollapudi fcp_rsp_len = rq_buff_len 1790853e2bd2SBhanu Gollapudi = fcp_rsp->fcp_rsp_len; 1791853e2bd2SBhanu Gollapudi } 1792853e2bd2SBhanu Gollapudi 1793853e2bd2SBhanu Gollapudi if (rsp_flags & 1794853e2bd2SBhanu Gollapudi FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { 1795853e2bd2SBhanu Gollapudi fcp_sns_len = fcp_rsp->fcp_sns_len; 1796853e2bd2SBhanu Gollapudi rq_buff_len += fcp_rsp->fcp_sns_len; 1797853e2bd2SBhanu Gollapudi } 1798853e2bd2SBhanu Gollapudi 1799853e2bd2SBhanu Gollapudi io_req->fcp_rsp_len = fcp_rsp_len; 1800853e2bd2SBhanu Gollapudi io_req->fcp_sns_len = fcp_sns_len; 1801853e2bd2SBhanu Gollapudi 1802853e2bd2SBhanu Gollapudi if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { 1803853e2bd2SBhanu Gollapudi /* Invalid sense sense length. */ 1804b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "invalid sns length %d\n", 1805853e2bd2SBhanu Gollapudi rq_buff_len); 1806853e2bd2SBhanu Gollapudi /* reset rq_buff_len */ 1807853e2bd2SBhanu Gollapudi rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; 1808853e2bd2SBhanu Gollapudi } 1809853e2bd2SBhanu Gollapudi 1810853e2bd2SBhanu Gollapudi /* fetch fcp_rsp_code */ 1811853e2bd2SBhanu Gollapudi if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1812853e2bd2SBhanu Gollapudi /* Only for task management function */ 1813853e2bd2SBhanu Gollapudi io_req->fcp_rsp_code = rq_data[3]; 18148a30a3c7SMaurizio Lombardi BNX2FC_IO_DBG(io_req, "fcp_rsp_code = %d\n", 1815853e2bd2SBhanu Gollapudi io_req->fcp_rsp_code); 1816853e2bd2SBhanu Gollapudi } 1817853e2bd2SBhanu Gollapudi 1818853e2bd2SBhanu Gollapudi /* fetch sense data */ 1819853e2bd2SBhanu Gollapudi rq_data += fcp_rsp_len; 1820853e2bd2SBhanu Gollapudi 1821853e2bd2SBhanu Gollapudi if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1822853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Truncating sense buffer\n"); 1823853e2bd2SBhanu Gollapudi fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1824853e2bd2SBhanu Gollapudi } 1825853e2bd2SBhanu Gollapudi 182616da05b1SAndi Kleen memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1827853e2bd2SBhanu Gollapudi if (fcp_sns_len) 1828853e2bd2SBhanu Gollapudi memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); 1829853e2bd2SBhanu Gollapudi 1830853e2bd2SBhanu Gollapudi } 1831853e2bd2SBhanu Gollapudi } 1832853e2bd2SBhanu Gollapudi 1833853e2bd2SBhanu Gollapudi /** 1834853e2bd2SBhanu Gollapudi * bnx2fc_queuecommand - Queuecommand function of the scsi template 1835853e2bd2SBhanu Gollapudi * 1836853e2bd2SBhanu Gollapudi * @host: The Scsi_Host the command was issued to 1837853e2bd2SBhanu Gollapudi * @sc_cmd: struct scsi_cmnd to be executed 1838853e2bd2SBhanu Gollapudi * 1839853e2bd2SBhanu Gollapudi * This is the IO strategy routine, called by SCSI-ML 1840853e2bd2SBhanu Gollapudi **/ 1841853e2bd2SBhanu Gollapudi int bnx2fc_queuecommand(struct Scsi_Host *host, 1842853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd) 1843853e2bd2SBhanu Gollapudi { 1844853e2bd2SBhanu Gollapudi struct fc_lport *lport = shost_priv(host); 1845853e2bd2SBhanu Gollapudi struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1846853e2bd2SBhanu Gollapudi struct fc_rport_libfc_priv *rp = rport->dd_data; 1847853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt; 1848853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req; 1849853e2bd2SBhanu Gollapudi int rc = 0; 1850853e2bd2SBhanu Gollapudi int rval; 1851853e2bd2SBhanu Gollapudi 1852853e2bd2SBhanu Gollapudi rval = fc_remote_port_chkready(rport); 1853853e2bd2SBhanu Gollapudi if (rval) { 1854853e2bd2SBhanu Gollapudi sc_cmd->result = rval; 1855853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 1856853e2bd2SBhanu Gollapudi return 0; 1857853e2bd2SBhanu Gollapudi } 1858853e2bd2SBhanu Gollapudi 1859853e2bd2SBhanu Gollapudi if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1860853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY; 1861853e2bd2SBhanu Gollapudi goto exit_qcmd; 1862853e2bd2SBhanu Gollapudi } 1863853e2bd2SBhanu Gollapudi 1864853e2bd2SBhanu Gollapudi /* rport and tgt are allocated together, so tgt should be non-NULL */ 1865853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1]; 1866853e2bd2SBhanu Gollapudi 1867853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 1868853e2bd2SBhanu Gollapudi /* 1869853e2bd2SBhanu Gollapudi * Session is not offloaded yet. Let SCSI-ml retry 1870853e2bd2SBhanu Gollapudi * the command. 1871853e2bd2SBhanu Gollapudi */ 1872853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_TARGET_BUSY; 1873853e2bd2SBhanu Gollapudi goto exit_qcmd; 1874853e2bd2SBhanu Gollapudi } 1875245a5754SEddie Wai if (tgt->retry_delay_timestamp) { 1876245a5754SEddie Wai if (time_after(jiffies, tgt->retry_delay_timestamp)) { 1877245a5754SEddie Wai tgt->retry_delay_timestamp = 0; 1878245a5754SEddie Wai } else { 1879245a5754SEddie Wai /* If retry_delay timer is active, flow off the ML */ 1880245a5754SEddie Wai rc = SCSI_MLQUEUE_TARGET_BUSY; 1881245a5754SEddie Wai goto exit_qcmd; 1882245a5754SEddie Wai } 1883245a5754SEddie Wai } 1884dc6311ddSMaurizio Lombardi 1885dc6311ddSMaurizio Lombardi spin_lock_bh(&tgt->tgt_lock); 1886dc6311ddSMaurizio Lombardi 1887853e2bd2SBhanu Gollapudi io_req = bnx2fc_cmd_alloc(tgt); 1888853e2bd2SBhanu Gollapudi if (!io_req) { 1889853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY; 1890dc6311ddSMaurizio Lombardi goto exit_qcmd_tgtlock; 1891853e2bd2SBhanu Gollapudi } 1892853e2bd2SBhanu Gollapudi io_req->sc_cmd = sc_cmd; 1893853e2bd2SBhanu Gollapudi 1894853e2bd2SBhanu Gollapudi if (bnx2fc_post_io_req(tgt, io_req)) { 1895853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Unable to post io_req\n"); 1896853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY; 1897dc6311ddSMaurizio Lombardi goto exit_qcmd_tgtlock; 1898853e2bd2SBhanu Gollapudi } 1899dc6311ddSMaurizio Lombardi 1900dc6311ddSMaurizio Lombardi exit_qcmd_tgtlock: 1901dc6311ddSMaurizio Lombardi spin_unlock_bh(&tgt->tgt_lock); 1902853e2bd2SBhanu Gollapudi exit_qcmd: 1903853e2bd2SBhanu Gollapudi return rc; 1904853e2bd2SBhanu Gollapudi } 1905853e2bd2SBhanu Gollapudi 1906853e2bd2SBhanu Gollapudi void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, 1907853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task, 190877331115SJaved Hasan u8 num_rq, unsigned char *rq_data) 1909853e2bd2SBhanu Gollapudi { 1910853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp; 1911853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt; 1912853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd; 1913c9c53749SLaurence Oberman u16 scope = 0, qualifier = 0; 1914853e2bd2SBhanu Gollapudi 1915853e2bd2SBhanu Gollapudi /* scsi_cmd_cmpl is called with tgt lock held */ 1916853e2bd2SBhanu Gollapudi 1917853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 1918853e2bd2SBhanu Gollapudi /* we will not receive ABTS response for this IO */ 1919853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Timer context finished processing " 1920853e2bd2SBhanu Gollapudi "this scsi cmd\n"); 192130e73671SSaurav Kashyap if (test_and_clear_bit(BNX2FC_FLAG_IO_CLEANUP, 192230e73671SSaurav Kashyap &io_req->req_flags)) { 192330e73671SSaurav Kashyap BNX2FC_IO_DBG(io_req, 192430e73671SSaurav Kashyap "Actual completion after cleanup request cleaning up\n"); 192530e73671SSaurav Kashyap bnx2fc_process_cleanup_compl(io_req, task, num_rq); 192630e73671SSaurav Kashyap } 1927ecf7ff49SChad Dupuis return; 1928853e2bd2SBhanu Gollapudi } 1929853e2bd2SBhanu Gollapudi 1930853e2bd2SBhanu Gollapudi /* Cancel the timeout_work, as we received IO completion */ 1931853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work)) 1932853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, 1933853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* drop timer hold */ 1934853e2bd2SBhanu Gollapudi 1935853e2bd2SBhanu Gollapudi sc_cmd = io_req->sc_cmd; 1936853e2bd2SBhanu Gollapudi if (sc_cmd == NULL) { 1937853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n"); 1938853e2bd2SBhanu Gollapudi return; 1939853e2bd2SBhanu Gollapudi } 1940853e2bd2SBhanu Gollapudi 1941853e2bd2SBhanu Gollapudi /* Fetch fcp_rsp from task context and perform cmd completion */ 1942853e2bd2SBhanu Gollapudi fcp_rsp = (struct fcoe_fcp_rsp_payload *) 1943619c5cb6SVlad Zolotarov &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload); 1944853e2bd2SBhanu Gollapudi 1945853e2bd2SBhanu Gollapudi /* parse fcp_rsp and obtain sense data from RQ if available */ 194677331115SJaved Hasan bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq, rq_data); 1947853e2bd2SBhanu Gollapudi 1948853e2bd2SBhanu Gollapudi if (!sc_cmd->SCp.ptr) { 1949853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "SCp.ptr is NULL\n"); 1950853e2bd2SBhanu Gollapudi return; 1951853e2bd2SBhanu Gollapudi } 1952853e2bd2SBhanu Gollapudi 1953853e2bd2SBhanu Gollapudi if (io_req->on_active_queue) { 1954853e2bd2SBhanu Gollapudi list_del_init(&io_req->link); 1955853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0; 1956853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */ 1957853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue); 1958853e2bd2SBhanu Gollapudi } else { 1959853e2bd2SBhanu Gollapudi /* This should not happen, but could have been pulled 1960853e2bd2SBhanu Gollapudi * by bnx2fc_flush_active_ios(), or during a race 1961853e2bd2SBhanu Gollapudi * between command abort and (late) completion. 1962853e2bd2SBhanu Gollapudi */ 1963853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n"); 19640e0fcef9SSaurav Kashyap if (io_req->wait_for_abts_comp) 1965853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1966853e2bd2SBhanu Gollapudi &io_req->req_flags)) 19670e0fcef9SSaurav Kashyap complete(&io_req->abts_done); 1968853e2bd2SBhanu Gollapudi } 1969853e2bd2SBhanu Gollapudi 1970853e2bd2SBhanu Gollapudi bnx2fc_unmap_sg_list(io_req); 1971b5a95fe7SBhanu Prakash Gollapudi io_req->sc_cmd = NULL; 1972853e2bd2SBhanu Gollapudi 1973853e2bd2SBhanu Gollapudi switch (io_req->fcp_status) { 1974853e2bd2SBhanu Gollapudi case FC_GOOD: 1975853e2bd2SBhanu Gollapudi if (io_req->cdb_status == 0) { 1976853e2bd2SBhanu Gollapudi /* Good IO completion */ 1977853e2bd2SBhanu Gollapudi sc_cmd->result = DID_OK << 16; 1978853e2bd2SBhanu Gollapudi } else { 1979853e2bd2SBhanu Gollapudi /* Transport status is good, SCSI status not good */ 1980853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d" 1981853e2bd2SBhanu Gollapudi " fcp_resid = 0x%x\n", 1982853e2bd2SBhanu Gollapudi io_req->cdb_status, io_req->fcp_resid); 1983853e2bd2SBhanu Gollapudi sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1984245a5754SEddie Wai 1985245a5754SEddie Wai if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || 1986245a5754SEddie Wai io_req->cdb_status == SAM_STAT_BUSY) { 1987c9c53749SLaurence Oberman /* Newer array firmware with BUSY or 1988c9c53749SLaurence Oberman * TASK_SET_FULL may return a status that needs 1989c9c53749SLaurence Oberman * the scope bits masked. 1990c9c53749SLaurence Oberman * Or a huge delay timestamp up to 27 minutes 1991c9c53749SLaurence Oberman * can result. 1992c9c53749SLaurence Oberman */ 1993c9c53749SLaurence Oberman if (fcp_rsp->retry_delay_timer) { 1994c9c53749SLaurence Oberman /* Upper 2 bits */ 1995c9c53749SLaurence Oberman scope = fcp_rsp->retry_delay_timer 1996c9c53749SLaurence Oberman & 0xC000; 1997c9c53749SLaurence Oberman /* Lower 14 bits */ 1998c9c53749SLaurence Oberman qualifier = fcp_rsp->retry_delay_timer 1999c9c53749SLaurence Oberman & 0x3FFF; 2000245a5754SEddie Wai } 2001c9c53749SLaurence Oberman if (scope > 0 && qualifier > 0 && 2002c9c53749SLaurence Oberman qualifier <= 0x3FEF) { 2003c9c53749SLaurence Oberman /* Set the jiffies + 2004c9c53749SLaurence Oberman * retry_delay_timer * 100ms 2005c9c53749SLaurence Oberman * for the rport/tgt 2006c9c53749SLaurence Oberman */ 2007c9c53749SLaurence Oberman tgt->retry_delay_timestamp = jiffies + 2008c9c53749SLaurence Oberman (qualifier * HZ / 10); 2009c9c53749SLaurence Oberman } 2010c9c53749SLaurence Oberman } 2011853e2bd2SBhanu Gollapudi } 2012853e2bd2SBhanu Gollapudi if (io_req->fcp_resid) 2013853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, io_req->fcp_resid); 2014853e2bd2SBhanu Gollapudi break; 2015853e2bd2SBhanu Gollapudi default: 2016b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n", 2017853e2bd2SBhanu Gollapudi io_req->fcp_status); 2018853e2bd2SBhanu Gollapudi break; 2019853e2bd2SBhanu Gollapudi } 2020853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = NULL; 2021853e2bd2SBhanu Gollapudi sc_cmd->scsi_done(sc_cmd); 2022853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2023853e2bd2SBhanu Gollapudi } 2024853e2bd2SBhanu Gollapudi 202574446954SBhanu Prakash Gollapudi int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, 2026853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req) 2027853e2bd2SBhanu Gollapudi { 2028853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task; 2029853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page; 2030853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 2031853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port; 2032aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv; 2033aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba; 2034853e2bd2SBhanu Gollapudi struct fc_lport *lport = port->lport; 20351bd49b48SVasu Dev struct fc_stats *stats; 2036853e2bd2SBhanu Gollapudi int task_idx, index; 2037853e2bd2SBhanu Gollapudi u16 xid; 2038853e2bd2SBhanu Gollapudi 2039dc6311ddSMaurizio Lombardi /* bnx2fc_post_io_req() is called with the tgt_lock held */ 2040dc6311ddSMaurizio Lombardi 2041853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */ 2042853e2bd2SBhanu Gollapudi io_req->cmd_type = BNX2FC_SCSI_CMD; 2043853e2bd2SBhanu Gollapudi io_req->port = port; 2044853e2bd2SBhanu Gollapudi io_req->tgt = tgt; 2045853e2bd2SBhanu Gollapudi io_req->data_xfer_len = scsi_bufflen(sc_cmd); 2046853e2bd2SBhanu Gollapudi sc_cmd->SCp.ptr = (char *)io_req; 2047853e2bd2SBhanu Gollapudi 20481bd49b48SVasu Dev stats = per_cpu_ptr(lport->stats, get_cpu()); 2049853e2bd2SBhanu Gollapudi if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { 2050853e2bd2SBhanu Gollapudi io_req->io_req_flags = BNX2FC_READ; 2051853e2bd2SBhanu Gollapudi stats->InputRequests++; 2052853e2bd2SBhanu Gollapudi stats->InputBytes += io_req->data_xfer_len; 2053853e2bd2SBhanu Gollapudi } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 2054853e2bd2SBhanu Gollapudi io_req->io_req_flags = BNX2FC_WRITE; 2055853e2bd2SBhanu Gollapudi stats->OutputRequests++; 2056853e2bd2SBhanu Gollapudi stats->OutputBytes += io_req->data_xfer_len; 2057853e2bd2SBhanu Gollapudi } else { 2058853e2bd2SBhanu Gollapudi io_req->io_req_flags = 0; 2059853e2bd2SBhanu Gollapudi stats->ControlRequests++; 2060853e2bd2SBhanu Gollapudi } 2061853e2bd2SBhanu Gollapudi put_cpu(); 2062853e2bd2SBhanu Gollapudi 2063853e2bd2SBhanu Gollapudi xid = io_req->xid; 2064853e2bd2SBhanu Gollapudi 2065853e2bd2SBhanu Gollapudi /* Build buffer descriptor list for firmware from sg list */ 2066822f2903SBhanu Prakash Gollapudi if (bnx2fc_build_bd_list_from_sg(io_req)) { 2067822f2903SBhanu Prakash Gollapudi printk(KERN_ERR PFX "BD list creation failed\n"); 2068822f2903SBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2069822f2903SBhanu Prakash Gollapudi return -EAGAIN; 2070822f2903SBhanu Prakash Gollapudi } 2071853e2bd2SBhanu Gollapudi 2072853e2bd2SBhanu Gollapudi task_idx = xid / BNX2FC_TASKS_PER_PAGE; 2073853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE; 2074853e2bd2SBhanu Gollapudi 2075853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */ 2076853e2bd2SBhanu Gollapudi task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; 2077853e2bd2SBhanu Gollapudi task = &(task_page[index]); 2078853e2bd2SBhanu Gollapudi bnx2fc_init_task(io_req, task); 2079853e2bd2SBhanu Gollapudi 2080853e2bd2SBhanu Gollapudi if (tgt->flush_in_prog) { 2081853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Flush in progress..Host Busy\n"); 2082853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2083853e2bd2SBhanu Gollapudi return -EAGAIN; 2084853e2bd2SBhanu Gollapudi } 2085853e2bd2SBhanu Gollapudi 2086853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 2087853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Session not ready...post_io\n"); 2088853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release); 2089853e2bd2SBhanu Gollapudi return -EAGAIN; 2090853e2bd2SBhanu Gollapudi } 2091853e2bd2SBhanu Gollapudi 2092853e2bd2SBhanu Gollapudi /* Time IO req */ 2093b252f4c7SBhanu Prakash Gollapudi if (tgt->io_timeout) 2094853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); 2095853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */ 2096853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid); 2097853e2bd2SBhanu Gollapudi 2098853e2bd2SBhanu Gollapudi /* Enqueue the io_req to active_cmd_queue */ 2099853e2bd2SBhanu Gollapudi 2100853e2bd2SBhanu Gollapudi io_req->on_active_queue = 1; 2101853e2bd2SBhanu Gollapudi /* move io_req from pending_queue to active_queue */ 2102853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->active_cmd_queue); 2103853e2bd2SBhanu Gollapudi 2104853e2bd2SBhanu Gollapudi /* Ring doorbell */ 2105853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt); 2106853e2bd2SBhanu Gollapudi return 0; 2107853e2bd2SBhanu Gollapudi } 2108