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950 lines
26 KiB
950 lines
26 KiB
/* |
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* bnx2fc_els.c: QLogic Linux FCoE offload driver. |
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* This file contains helper routines that handle ELS requests |
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* and responses. |
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* |
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* Copyright (c) 2008-2013 Broadcom Corporation |
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* Copyright (c) 2014-2016 QLogic Corporation |
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* Copyright (c) 2016-2017 Cavium Inc. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation. |
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* |
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* Written by: Bhanu Prakash Gollapudi ([email protected]) |
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*/ |
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|
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#include "bnx2fc.h" |
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static void bnx2fc_logo_resp(struct fc_seq *seq, struct fc_frame *fp, |
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void *arg); |
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static void bnx2fc_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, |
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void *arg); |
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static int bnx2fc_initiate_els(struct bnx2fc_rport *tgt, unsigned int op, |
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void *data, u32 data_len, |
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void (*cb_func)(struct bnx2fc_els_cb_arg *cb_arg), |
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struct bnx2fc_els_cb_arg *cb_arg, u32 timer_msec); |
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static void bnx2fc_rrq_compl(struct bnx2fc_els_cb_arg *cb_arg) |
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{ |
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struct bnx2fc_cmd *orig_io_req; |
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struct bnx2fc_cmd *rrq_req; |
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int rc = 0; |
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BUG_ON(!cb_arg); |
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rrq_req = cb_arg->io_req; |
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orig_io_req = cb_arg->aborted_io_req; |
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BUG_ON(!orig_io_req); |
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BNX2FC_ELS_DBG("rrq_compl: orig xid = 0x%x, rrq_xid = 0x%x\n", |
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orig_io_req->xid, rrq_req->xid); |
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kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); |
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if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &rrq_req->req_flags)) { |
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/* |
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* els req is timed out. cleanup the IO with FW and |
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* drop the completion. Remove from active_cmd_queue. |
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*/ |
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BNX2FC_ELS_DBG("rrq xid - 0x%x timed out, clean it up\n", |
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rrq_req->xid); |
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if (rrq_req->on_active_queue) { |
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list_del_init(&rrq_req->link); |
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rrq_req->on_active_queue = 0; |
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rc = bnx2fc_initiate_cleanup(rrq_req); |
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BUG_ON(rc); |
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} |
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} |
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kfree(cb_arg); |
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} |
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int bnx2fc_send_rrq(struct bnx2fc_cmd *aborted_io_req) |
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{ |
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struct fc_els_rrq rrq; |
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struct bnx2fc_rport *tgt = aborted_io_req->tgt; |
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struct fc_lport *lport = NULL; |
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struct bnx2fc_els_cb_arg *cb_arg = NULL; |
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u32 sid = 0; |
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u32 r_a_tov = 0; |
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unsigned long start = jiffies; |
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int rc; |
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if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) |
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return -EINVAL; |
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lport = tgt->rdata->local_port; |
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sid = tgt->sid; |
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r_a_tov = lport->r_a_tov; |
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BNX2FC_ELS_DBG("Sending RRQ orig_xid = 0x%x\n", |
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aborted_io_req->xid); |
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memset(&rrq, 0, sizeof(rrq)); |
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cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_NOIO); |
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if (!cb_arg) { |
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printk(KERN_ERR PFX "Unable to allocate cb_arg for RRQ\n"); |
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rc = -ENOMEM; |
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goto rrq_err; |
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} |
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cb_arg->aborted_io_req = aborted_io_req; |
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rrq.rrq_cmd = ELS_RRQ; |
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hton24(rrq.rrq_s_id, sid); |
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rrq.rrq_ox_id = htons(aborted_io_req->xid); |
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rrq.rrq_rx_id = htons(aborted_io_req->task->rxwr_txrd.var_ctx.rx_id); |
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retry_rrq: |
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rc = bnx2fc_initiate_els(tgt, ELS_RRQ, &rrq, sizeof(rrq), |
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bnx2fc_rrq_compl, cb_arg, |
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r_a_tov); |
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if (rc == -ENOMEM) { |
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if (time_after(jiffies, start + (10 * HZ))) { |
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BNX2FC_ELS_DBG("rrq Failed\n"); |
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rc = FAILED; |
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goto rrq_err; |
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} |
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msleep(20); |
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goto retry_rrq; |
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} |
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rrq_err: |
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if (rc) { |
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BNX2FC_ELS_DBG("RRQ failed - release orig io req 0x%x\n", |
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aborted_io_req->xid); |
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kfree(cb_arg); |
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spin_lock_bh(&tgt->tgt_lock); |
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kref_put(&aborted_io_req->refcount, bnx2fc_cmd_release); |
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spin_unlock_bh(&tgt->tgt_lock); |
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} |
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return rc; |
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} |
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static void bnx2fc_l2_els_compl(struct bnx2fc_els_cb_arg *cb_arg) |
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{ |
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struct bnx2fc_cmd *els_req; |
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struct bnx2fc_rport *tgt; |
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struct bnx2fc_mp_req *mp_req; |
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struct fc_frame_header *fc_hdr; |
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unsigned char *buf; |
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void *resp_buf; |
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u32 resp_len, hdr_len; |
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u16 l2_oxid; |
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int frame_len; |
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int rc = 0; |
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l2_oxid = cb_arg->l2_oxid; |
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BNX2FC_ELS_DBG("ELS COMPL - l2_oxid = 0x%x\n", l2_oxid); |
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els_req = cb_arg->io_req; |
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if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &els_req->req_flags)) { |
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/* |
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* els req is timed out. cleanup the IO with FW and |
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* drop the completion. libfc will handle the els timeout |
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*/ |
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if (els_req->on_active_queue) { |
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list_del_init(&els_req->link); |
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els_req->on_active_queue = 0; |
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rc = bnx2fc_initiate_cleanup(els_req); |
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BUG_ON(rc); |
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} |
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goto free_arg; |
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} |
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tgt = els_req->tgt; |
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mp_req = &(els_req->mp_req); |
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fc_hdr = &(mp_req->resp_fc_hdr); |
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resp_len = mp_req->resp_len; |
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resp_buf = mp_req->resp_buf; |
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buf = kzalloc(PAGE_SIZE, GFP_ATOMIC); |
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if (!buf) { |
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printk(KERN_ERR PFX "Unable to alloc mp buf\n"); |
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goto free_arg; |
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} |
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hdr_len = sizeof(*fc_hdr); |
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if (hdr_len + resp_len > PAGE_SIZE) { |
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printk(KERN_ERR PFX "l2_els_compl: resp len is " |
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"beyond page size\n"); |
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goto free_buf; |
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} |
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memcpy(buf, fc_hdr, hdr_len); |
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memcpy(buf + hdr_len, resp_buf, resp_len); |
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frame_len = hdr_len + resp_len; |
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bnx2fc_process_l2_frame_compl(tgt, buf, frame_len, l2_oxid); |
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free_buf: |
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kfree(buf); |
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free_arg: |
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kfree(cb_arg); |
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} |
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int bnx2fc_send_adisc(struct bnx2fc_rport *tgt, struct fc_frame *fp) |
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{ |
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struct fc_els_adisc *adisc; |
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struct fc_frame_header *fh; |
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struct bnx2fc_els_cb_arg *cb_arg; |
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struct fc_lport *lport = tgt->rdata->local_port; |
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u32 r_a_tov = lport->r_a_tov; |
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int rc; |
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fh = fc_frame_header_get(fp); |
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cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); |
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if (!cb_arg) { |
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printk(KERN_ERR PFX "Unable to allocate cb_arg for ADISC\n"); |
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return -ENOMEM; |
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} |
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cb_arg->l2_oxid = ntohs(fh->fh_ox_id); |
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BNX2FC_ELS_DBG("send ADISC: l2_oxid = 0x%x\n", cb_arg->l2_oxid); |
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adisc = fc_frame_payload_get(fp, sizeof(*adisc)); |
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/* adisc is initialized by libfc */ |
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rc = bnx2fc_initiate_els(tgt, ELS_ADISC, adisc, sizeof(*adisc), |
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bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov); |
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if (rc) |
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kfree(cb_arg); |
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return rc; |
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} |
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int bnx2fc_send_logo(struct bnx2fc_rport *tgt, struct fc_frame *fp) |
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{ |
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struct fc_els_logo *logo; |
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struct fc_frame_header *fh; |
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struct bnx2fc_els_cb_arg *cb_arg; |
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struct fc_lport *lport = tgt->rdata->local_port; |
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u32 r_a_tov = lport->r_a_tov; |
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int rc; |
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fh = fc_frame_header_get(fp); |
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cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); |
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if (!cb_arg) { |
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printk(KERN_ERR PFX "Unable to allocate cb_arg for LOGO\n"); |
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return -ENOMEM; |
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} |
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cb_arg->l2_oxid = ntohs(fh->fh_ox_id); |
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BNX2FC_ELS_DBG("Send LOGO: l2_oxid = 0x%x\n", cb_arg->l2_oxid); |
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logo = fc_frame_payload_get(fp, sizeof(*logo)); |
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/* logo is initialized by libfc */ |
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rc = bnx2fc_initiate_els(tgt, ELS_LOGO, logo, sizeof(*logo), |
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bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov); |
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if (rc) |
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kfree(cb_arg); |
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return rc; |
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} |
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int bnx2fc_send_rls(struct bnx2fc_rport *tgt, struct fc_frame *fp) |
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{ |
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struct fc_els_rls *rls; |
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struct fc_frame_header *fh; |
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struct bnx2fc_els_cb_arg *cb_arg; |
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struct fc_lport *lport = tgt->rdata->local_port; |
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u32 r_a_tov = lport->r_a_tov; |
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int rc; |
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fh = fc_frame_header_get(fp); |
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cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); |
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if (!cb_arg) { |
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printk(KERN_ERR PFX "Unable to allocate cb_arg for LOGO\n"); |
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return -ENOMEM; |
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} |
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cb_arg->l2_oxid = ntohs(fh->fh_ox_id); |
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rls = fc_frame_payload_get(fp, sizeof(*rls)); |
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/* rls is initialized by libfc */ |
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rc = bnx2fc_initiate_els(tgt, ELS_RLS, rls, sizeof(*rls), |
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bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov); |
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if (rc) |
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kfree(cb_arg); |
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return rc; |
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} |
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static void bnx2fc_srr_compl(struct bnx2fc_els_cb_arg *cb_arg) |
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{ |
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struct bnx2fc_mp_req *mp_req; |
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struct fc_frame_header *fc_hdr, *fh; |
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struct bnx2fc_cmd *srr_req; |
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struct bnx2fc_cmd *orig_io_req; |
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struct fc_frame *fp; |
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unsigned char *buf; |
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void *resp_buf; |
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u32 resp_len, hdr_len; |
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u8 opcode; |
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int rc = 0; |
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orig_io_req = cb_arg->aborted_io_req; |
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srr_req = cb_arg->io_req; |
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if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &srr_req->req_flags)) { |
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/* SRR timedout */ |
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BNX2FC_IO_DBG(srr_req, "srr timed out, abort " |
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"orig_io - 0x%x\n", |
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orig_io_req->xid); |
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rc = bnx2fc_initiate_abts(srr_req); |
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if (rc != SUCCESS) { |
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BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts " |
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"failed. issue cleanup\n"); |
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bnx2fc_initiate_cleanup(srr_req); |
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} |
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if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags) || |
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test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) { |
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BNX2FC_IO_DBG(srr_req, "srr_compl:xid 0x%x flags = %lx", |
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orig_io_req->xid, orig_io_req->req_flags); |
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goto srr_compl_done; |
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} |
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orig_io_req->srr_retry++; |
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if (orig_io_req->srr_retry <= SRR_RETRY_COUNT) { |
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struct bnx2fc_rport *tgt = orig_io_req->tgt; |
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spin_unlock_bh(&tgt->tgt_lock); |
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rc = bnx2fc_send_srr(orig_io_req, |
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orig_io_req->srr_offset, |
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orig_io_req->srr_rctl); |
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spin_lock_bh(&tgt->tgt_lock); |
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if (!rc) |
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goto srr_compl_done; |
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} |
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rc = bnx2fc_initiate_abts(orig_io_req); |
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if (rc != SUCCESS) { |
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BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts " |
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"failed xid = 0x%x. issue cleanup\n", |
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orig_io_req->xid); |
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bnx2fc_initiate_cleanup(orig_io_req); |
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} |
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goto srr_compl_done; |
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} |
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if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags) || |
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test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) { |
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BNX2FC_IO_DBG(srr_req, "srr_compl:xid - 0x%x flags = %lx", |
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orig_io_req->xid, orig_io_req->req_flags); |
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goto srr_compl_done; |
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} |
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mp_req = &(srr_req->mp_req); |
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fc_hdr = &(mp_req->resp_fc_hdr); |
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resp_len = mp_req->resp_len; |
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resp_buf = mp_req->resp_buf; |
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hdr_len = sizeof(*fc_hdr); |
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buf = kzalloc(PAGE_SIZE, GFP_ATOMIC); |
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if (!buf) { |
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printk(KERN_ERR PFX "srr buf: mem alloc failure\n"); |
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goto srr_compl_done; |
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} |
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memcpy(buf, fc_hdr, hdr_len); |
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memcpy(buf + hdr_len, resp_buf, resp_len); |
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fp = fc_frame_alloc(NULL, resp_len); |
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if (!fp) { |
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printk(KERN_ERR PFX "fc_frame_alloc failure\n"); |
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goto free_buf; |
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} |
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fh = (struct fc_frame_header *) fc_frame_header_get(fp); |
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/* Copy FC Frame header and payload into the frame */ |
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memcpy(fh, buf, hdr_len + resp_len); |
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opcode = fc_frame_payload_op(fp); |
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switch (opcode) { |
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case ELS_LS_ACC: |
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BNX2FC_IO_DBG(srr_req, "SRR success\n"); |
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break; |
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case ELS_LS_RJT: |
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BNX2FC_IO_DBG(srr_req, "SRR rejected\n"); |
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rc = bnx2fc_initiate_abts(orig_io_req); |
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if (rc != SUCCESS) { |
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BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts " |
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"failed xid = 0x%x. issue cleanup\n", |
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orig_io_req->xid); |
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bnx2fc_initiate_cleanup(orig_io_req); |
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} |
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break; |
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default: |
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BNX2FC_IO_DBG(srr_req, "srr compl - invalid opcode = %d\n", |
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opcode); |
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break; |
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} |
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fc_frame_free(fp); |
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free_buf: |
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kfree(buf); |
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srr_compl_done: |
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kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); |
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} |
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static void bnx2fc_rec_compl(struct bnx2fc_els_cb_arg *cb_arg) |
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{ |
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struct bnx2fc_cmd *orig_io_req, *new_io_req; |
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struct bnx2fc_cmd *rec_req; |
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struct bnx2fc_mp_req *mp_req; |
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struct fc_frame_header *fc_hdr, *fh; |
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struct fc_els_ls_rjt *rjt; |
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struct fc_els_rec_acc *acc; |
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struct bnx2fc_rport *tgt; |
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struct fcoe_err_report_entry *err_entry; |
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struct scsi_cmnd *sc_cmd; |
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enum fc_rctl r_ctl; |
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unsigned char *buf; |
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void *resp_buf; |
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struct fc_frame *fp; |
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u8 opcode; |
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u32 offset; |
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u32 e_stat; |
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u32 resp_len, hdr_len; |
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int rc = 0; |
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bool send_seq_clnp = false; |
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bool abort_io = false; |
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BNX2FC_MISC_DBG("Entered rec_compl callback\n"); |
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rec_req = cb_arg->io_req; |
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orig_io_req = cb_arg->aborted_io_req; |
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BNX2FC_IO_DBG(rec_req, "rec_compl: orig xid = 0x%x", orig_io_req->xid); |
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tgt = orig_io_req->tgt; |
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/* Handle REC timeout case */ |
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if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &rec_req->req_flags)) { |
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BNX2FC_IO_DBG(rec_req, "timed out, abort " |
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"orig_io - 0x%x\n", |
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orig_io_req->xid); |
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/* els req is timed out. send abts for els */ |
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rc = bnx2fc_initiate_abts(rec_req); |
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if (rc != SUCCESS) { |
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BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts " |
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"failed. issue cleanup\n"); |
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bnx2fc_initiate_cleanup(rec_req); |
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} |
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orig_io_req->rec_retry++; |
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/* REC timedout. send ABTS to the orig IO req */ |
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if (orig_io_req->rec_retry <= REC_RETRY_COUNT) { |
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spin_unlock_bh(&tgt->tgt_lock); |
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rc = bnx2fc_send_rec(orig_io_req); |
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spin_lock_bh(&tgt->tgt_lock); |
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if (!rc) |
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goto rec_compl_done; |
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} |
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rc = bnx2fc_initiate_abts(orig_io_req); |
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if (rc != SUCCESS) { |
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BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts " |
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"failed xid = 0x%x. issue cleanup\n", |
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orig_io_req->xid); |
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bnx2fc_initiate_cleanup(orig_io_req); |
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} |
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goto rec_compl_done; |
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} |
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if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags)) { |
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BNX2FC_IO_DBG(rec_req, "completed" |
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"orig_io - 0x%x\n", |
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orig_io_req->xid); |
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goto rec_compl_done; |
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} |
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if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) { |
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BNX2FC_IO_DBG(rec_req, "abts in prog " |
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"orig_io - 0x%x\n", |
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orig_io_req->xid); |
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goto rec_compl_done; |
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} |
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mp_req = &(rec_req->mp_req); |
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fc_hdr = &(mp_req->resp_fc_hdr); |
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resp_len = mp_req->resp_len; |
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acc = resp_buf = mp_req->resp_buf; |
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hdr_len = sizeof(*fc_hdr); |
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buf = kzalloc(PAGE_SIZE, GFP_ATOMIC); |
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if (!buf) { |
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printk(KERN_ERR PFX "rec buf: mem alloc failure\n"); |
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goto rec_compl_done; |
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} |
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memcpy(buf, fc_hdr, hdr_len); |
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memcpy(buf + hdr_len, resp_buf, resp_len); |
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fp = fc_frame_alloc(NULL, resp_len); |
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if (!fp) { |
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printk(KERN_ERR PFX "fc_frame_alloc failure\n"); |
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goto free_buf; |
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} |
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fh = (struct fc_frame_header *) fc_frame_header_get(fp); |
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/* Copy FC Frame header and payload into the frame */ |
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memcpy(fh, buf, hdr_len + resp_len); |
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|
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opcode = fc_frame_payload_op(fp); |
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if (opcode == ELS_LS_RJT) { |
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BNX2FC_IO_DBG(rec_req, "opcode is RJT\n"); |
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rjt = fc_frame_payload_get(fp, sizeof(*rjt)); |
|
if ((rjt->er_reason == ELS_RJT_LOGIC || |
|
rjt->er_reason == ELS_RJT_UNAB) && |
|
rjt->er_explan == ELS_EXPL_OXID_RXID) { |
|
BNX2FC_IO_DBG(rec_req, "handle CMD LOST case\n"); |
|
new_io_req = bnx2fc_cmd_alloc(tgt); |
|
if (!new_io_req) |
|
goto abort_io; |
|
new_io_req->sc_cmd = orig_io_req->sc_cmd; |
|
/* cleanup orig_io_req that is with the FW */ |
|
set_bit(BNX2FC_FLAG_CMD_LOST, |
|
&orig_io_req->req_flags); |
|
bnx2fc_initiate_cleanup(orig_io_req); |
|
/* Post a new IO req with the same sc_cmd */ |
|
BNX2FC_IO_DBG(rec_req, "Post IO request again\n"); |
|
rc = bnx2fc_post_io_req(tgt, new_io_req); |
|
if (!rc) |
|
goto free_frame; |
|
BNX2FC_IO_DBG(rec_req, "REC: io post err\n"); |
|
} |
|
abort_io: |
|
rc = bnx2fc_initiate_abts(orig_io_req); |
|
if (rc != SUCCESS) { |
|
BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts " |
|
"failed. issue cleanup\n"); |
|
bnx2fc_initiate_cleanup(orig_io_req); |
|
} |
|
} else if (opcode == ELS_LS_ACC) { |
|
/* REVISIT: Check if the exchange is already aborted */ |
|
offset = ntohl(acc->reca_fc4value); |
|
e_stat = ntohl(acc->reca_e_stat); |
|
if (e_stat & ESB_ST_SEQ_INIT) { |
|
BNX2FC_IO_DBG(rec_req, "target has the seq init\n"); |
|
goto free_frame; |
|
} |
|
BNX2FC_IO_DBG(rec_req, "e_stat = 0x%x, offset = 0x%x\n", |
|
e_stat, offset); |
|
/* Seq initiative is with us */ |
|
err_entry = (struct fcoe_err_report_entry *) |
|
&orig_io_req->err_entry; |
|
sc_cmd = orig_io_req->sc_cmd; |
|
if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { |
|
/* SCSI WRITE command */ |
|
if (offset == orig_io_req->data_xfer_len) { |
|
BNX2FC_IO_DBG(rec_req, "WRITE - resp lost\n"); |
|
/* FCP_RSP lost */ |
|
r_ctl = FC_RCTL_DD_CMD_STATUS; |
|
offset = 0; |
|
} else { |
|
/* start transmitting from offset */ |
|
BNX2FC_IO_DBG(rec_req, "XFER_RDY/DATA lost\n"); |
|
send_seq_clnp = true; |
|
r_ctl = FC_RCTL_DD_DATA_DESC; |
|
if (bnx2fc_initiate_seq_cleanup(orig_io_req, |
|
offset, r_ctl)) |
|
abort_io = true; |
|
/* XFER_RDY */ |
|
} |
|
} else { |
|
/* SCSI READ command */ |
|
if (err_entry->data.rx_buf_off == |
|
orig_io_req->data_xfer_len) { |
|
/* FCP_RSP lost */ |
|
BNX2FC_IO_DBG(rec_req, "READ - resp lost\n"); |
|
r_ctl = FC_RCTL_DD_CMD_STATUS; |
|
offset = 0; |
|
} else { |
|
/* request retransmission from this offset */ |
|
send_seq_clnp = true; |
|
offset = err_entry->data.rx_buf_off; |
|
BNX2FC_IO_DBG(rec_req, "RD DATA lost\n"); |
|
/* FCP_DATA lost */ |
|
r_ctl = FC_RCTL_DD_SOL_DATA; |
|
if (bnx2fc_initiate_seq_cleanup(orig_io_req, |
|
offset, r_ctl)) |
|
abort_io = true; |
|
} |
|
} |
|
if (abort_io) { |
|
rc = bnx2fc_initiate_abts(orig_io_req); |
|
if (rc != SUCCESS) { |
|
BNX2FC_IO_DBG(rec_req, "rec_compl:initiate_abts" |
|
" failed. issue cleanup\n"); |
|
bnx2fc_initiate_cleanup(orig_io_req); |
|
} |
|
} else if (!send_seq_clnp) { |
|
BNX2FC_IO_DBG(rec_req, "Send SRR - FCP_RSP\n"); |
|
spin_unlock_bh(&tgt->tgt_lock); |
|
rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); |
|
spin_lock_bh(&tgt->tgt_lock); |
|
|
|
if (rc) { |
|
BNX2FC_IO_DBG(rec_req, "Unable to send SRR" |
|
" IO will abort\n"); |
|
} |
|
} |
|
} |
|
free_frame: |
|
fc_frame_free(fp); |
|
free_buf: |
|
kfree(buf); |
|
rec_compl_done: |
|
kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); |
|
kfree(cb_arg); |
|
} |
|
|
|
int bnx2fc_send_rec(struct bnx2fc_cmd *orig_io_req) |
|
{ |
|
struct fc_els_rec rec; |
|
struct bnx2fc_rport *tgt = orig_io_req->tgt; |
|
struct fc_lport *lport = tgt->rdata->local_port; |
|
struct bnx2fc_els_cb_arg *cb_arg = NULL; |
|
u32 sid = tgt->sid; |
|
u32 r_a_tov = lport->r_a_tov; |
|
int rc; |
|
|
|
BNX2FC_IO_DBG(orig_io_req, "Sending REC\n"); |
|
memset(&rec, 0, sizeof(rec)); |
|
|
|
cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); |
|
if (!cb_arg) { |
|
printk(KERN_ERR PFX "Unable to allocate cb_arg for REC\n"); |
|
rc = -ENOMEM; |
|
goto rec_err; |
|
} |
|
kref_get(&orig_io_req->refcount); |
|
|
|
cb_arg->aborted_io_req = orig_io_req; |
|
|
|
rec.rec_cmd = ELS_REC; |
|
hton24(rec.rec_s_id, sid); |
|
rec.rec_ox_id = htons(orig_io_req->xid); |
|
rec.rec_rx_id = htons(orig_io_req->task->rxwr_txrd.var_ctx.rx_id); |
|
|
|
rc = bnx2fc_initiate_els(tgt, ELS_REC, &rec, sizeof(rec), |
|
bnx2fc_rec_compl, cb_arg, |
|
r_a_tov); |
|
if (rc) { |
|
BNX2FC_IO_DBG(orig_io_req, "REC failed - release\n"); |
|
spin_lock_bh(&tgt->tgt_lock); |
|
kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); |
|
spin_unlock_bh(&tgt->tgt_lock); |
|
kfree(cb_arg); |
|
} |
|
rec_err: |
|
return rc; |
|
} |
|
|
|
int bnx2fc_send_srr(struct bnx2fc_cmd *orig_io_req, u32 offset, u8 r_ctl) |
|
{ |
|
struct fcp_srr srr; |
|
struct bnx2fc_rport *tgt = orig_io_req->tgt; |
|
struct fc_lport *lport = tgt->rdata->local_port; |
|
struct bnx2fc_els_cb_arg *cb_arg = NULL; |
|
u32 r_a_tov = lport->r_a_tov; |
|
int rc; |
|
|
|
BNX2FC_IO_DBG(orig_io_req, "Sending SRR\n"); |
|
memset(&srr, 0, sizeof(srr)); |
|
|
|
cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); |
|
if (!cb_arg) { |
|
printk(KERN_ERR PFX "Unable to allocate cb_arg for SRR\n"); |
|
rc = -ENOMEM; |
|
goto srr_err; |
|
} |
|
kref_get(&orig_io_req->refcount); |
|
|
|
cb_arg->aborted_io_req = orig_io_req; |
|
|
|
srr.srr_op = ELS_SRR; |
|
srr.srr_ox_id = htons(orig_io_req->xid); |
|
srr.srr_rx_id = htons(orig_io_req->task->rxwr_txrd.var_ctx.rx_id); |
|
srr.srr_rel_off = htonl(offset); |
|
srr.srr_r_ctl = r_ctl; |
|
orig_io_req->srr_offset = offset; |
|
orig_io_req->srr_rctl = r_ctl; |
|
|
|
rc = bnx2fc_initiate_els(tgt, ELS_SRR, &srr, sizeof(srr), |
|
bnx2fc_srr_compl, cb_arg, |
|
r_a_tov); |
|
if (rc) { |
|
BNX2FC_IO_DBG(orig_io_req, "SRR failed - release\n"); |
|
spin_lock_bh(&tgt->tgt_lock); |
|
kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); |
|
spin_unlock_bh(&tgt->tgt_lock); |
|
kfree(cb_arg); |
|
} else |
|
set_bit(BNX2FC_FLAG_SRR_SENT, &orig_io_req->req_flags); |
|
|
|
srr_err: |
|
return rc; |
|
} |
|
|
|
static int bnx2fc_initiate_els(struct bnx2fc_rport *tgt, unsigned int op, |
|
void *data, u32 data_len, |
|
void (*cb_func)(struct bnx2fc_els_cb_arg *cb_arg), |
|
struct bnx2fc_els_cb_arg *cb_arg, u32 timer_msec) |
|
{ |
|
struct fcoe_port *port = tgt->port; |
|
struct bnx2fc_interface *interface = port->priv; |
|
struct fc_rport *rport = tgt->rport; |
|
struct fc_lport *lport = port->lport; |
|
struct bnx2fc_cmd *els_req; |
|
struct bnx2fc_mp_req *mp_req; |
|
struct fc_frame_header *fc_hdr; |
|
struct fcoe_task_ctx_entry *task; |
|
struct fcoe_task_ctx_entry *task_page; |
|
int rc = 0; |
|
int task_idx, index; |
|
u32 did, sid; |
|
u16 xid; |
|
|
|
rc = fc_remote_port_chkready(rport); |
|
if (rc) { |
|
printk(KERN_ERR PFX "els 0x%x: rport not ready\n", op); |
|
rc = -EINVAL; |
|
goto els_err; |
|
} |
|
if (lport->state != LPORT_ST_READY || !(lport->link_up)) { |
|
printk(KERN_ERR PFX "els 0x%x: link is not ready\n", op); |
|
rc = -EINVAL; |
|
goto els_err; |
|
} |
|
if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { |
|
printk(KERN_ERR PFX "els 0x%x: tgt not ready\n", op); |
|
rc = -EINVAL; |
|
goto els_err; |
|
} |
|
els_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ELS); |
|
if (!els_req) { |
|
rc = -ENOMEM; |
|
goto els_err; |
|
} |
|
|
|
els_req->sc_cmd = NULL; |
|
els_req->port = port; |
|
els_req->tgt = tgt; |
|
els_req->cb_func = cb_func; |
|
cb_arg->io_req = els_req; |
|
els_req->cb_arg = cb_arg; |
|
els_req->data_xfer_len = data_len; |
|
|
|
mp_req = (struct bnx2fc_mp_req *)&(els_req->mp_req); |
|
rc = bnx2fc_init_mp_req(els_req); |
|
if (rc == FAILED) { |
|
printk(KERN_ERR PFX "ELS MP request init failed\n"); |
|
spin_lock_bh(&tgt->tgt_lock); |
|
kref_put(&els_req->refcount, bnx2fc_cmd_release); |
|
spin_unlock_bh(&tgt->tgt_lock); |
|
rc = -ENOMEM; |
|
goto els_err; |
|
} else { |
|
/* rc SUCCESS */ |
|
rc = 0; |
|
} |
|
|
|
/* Set the data_xfer_len to the size of ELS payload */ |
|
mp_req->req_len = data_len; |
|
els_req->data_xfer_len = mp_req->req_len; |
|
|
|
/* Fill ELS Payload */ |
|
if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS)) { |
|
memcpy(mp_req->req_buf, data, data_len); |
|
} else { |
|
printk(KERN_ERR PFX "Invalid ELS op 0x%x\n", op); |
|
els_req->cb_func = NULL; |
|
els_req->cb_arg = NULL; |
|
spin_lock_bh(&tgt->tgt_lock); |
|
kref_put(&els_req->refcount, bnx2fc_cmd_release); |
|
spin_unlock_bh(&tgt->tgt_lock); |
|
rc = -EINVAL; |
|
} |
|
|
|
if (rc) |
|
goto els_err; |
|
|
|
/* Fill FC header */ |
|
fc_hdr = &(mp_req->req_fc_hdr); |
|
|
|
did = tgt->rport->port_id; |
|
sid = tgt->sid; |
|
|
|
if (op == ELS_SRR) |
|
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS4_REQ, did, sid, |
|
FC_TYPE_FCP, FC_FC_FIRST_SEQ | |
|
FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); |
|
else |
|
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS_REQ, did, sid, |
|
FC_TYPE_ELS, FC_FC_FIRST_SEQ | |
|
FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); |
|
|
|
/* Obtain exchange id */ |
|
xid = els_req->xid; |
|
task_idx = xid/BNX2FC_TASKS_PER_PAGE; |
|
index = xid % BNX2FC_TASKS_PER_PAGE; |
|
|
|
/* Initialize task context for this IO request */ |
|
task_page = (struct fcoe_task_ctx_entry *) |
|
interface->hba->task_ctx[task_idx]; |
|
task = &(task_page[index]); |
|
bnx2fc_init_mp_task(els_req, task); |
|
|
|
spin_lock_bh(&tgt->tgt_lock); |
|
|
|
if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { |
|
printk(KERN_ERR PFX "initiate_els.. session not ready\n"); |
|
els_req->cb_func = NULL; |
|
els_req->cb_arg = NULL; |
|
kref_put(&els_req->refcount, bnx2fc_cmd_release); |
|
spin_unlock_bh(&tgt->tgt_lock); |
|
return -EINVAL; |
|
} |
|
|
|
if (timer_msec) |
|
bnx2fc_cmd_timer_set(els_req, timer_msec); |
|
bnx2fc_add_2_sq(tgt, xid); |
|
|
|
els_req->on_active_queue = 1; |
|
list_add_tail(&els_req->link, &tgt->els_queue); |
|
|
|
/* Ring doorbell */ |
|
bnx2fc_ring_doorbell(tgt); |
|
spin_unlock_bh(&tgt->tgt_lock); |
|
|
|
els_err: |
|
return rc; |
|
} |
|
|
|
void bnx2fc_process_els_compl(struct bnx2fc_cmd *els_req, |
|
struct fcoe_task_ctx_entry *task, u8 num_rq) |
|
{ |
|
struct bnx2fc_mp_req *mp_req; |
|
struct fc_frame_header *fc_hdr; |
|
u64 *hdr; |
|
u64 *temp_hdr; |
|
|
|
BNX2FC_ELS_DBG("Entered process_els_compl xid = 0x%x" |
|
"cmd_type = %d\n", els_req->xid, els_req->cmd_type); |
|
|
|
if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, |
|
&els_req->req_flags)) { |
|
BNX2FC_ELS_DBG("Timer context finished processing this " |
|
"els - 0x%x\n", els_req->xid); |
|
/* This IO doesn't receive cleanup completion */ |
|
kref_put(&els_req->refcount, bnx2fc_cmd_release); |
|
return; |
|
} |
|
|
|
/* Cancel the timeout_work, as we received the response */ |
|
if (cancel_delayed_work(&els_req->timeout_work)) |
|
kref_put(&els_req->refcount, |
|
bnx2fc_cmd_release); /* drop timer hold */ |
|
|
|
if (els_req->on_active_queue) { |
|
list_del_init(&els_req->link); |
|
els_req->on_active_queue = 0; |
|
} |
|
|
|
mp_req = &(els_req->mp_req); |
|
fc_hdr = &(mp_req->resp_fc_hdr); |
|
|
|
hdr = (u64 *)fc_hdr; |
|
temp_hdr = (u64 *) |
|
&task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; |
|
hdr[0] = cpu_to_be64(temp_hdr[0]); |
|
hdr[1] = cpu_to_be64(temp_hdr[1]); |
|
hdr[2] = cpu_to_be64(temp_hdr[2]); |
|
|
|
mp_req->resp_len = |
|
task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; |
|
|
|
/* Parse ELS response */ |
|
if ((els_req->cb_func) && (els_req->cb_arg)) { |
|
els_req->cb_func(els_req->cb_arg); |
|
els_req->cb_arg = NULL; |
|
} |
|
|
|
kref_put(&els_req->refcount, bnx2fc_cmd_release); |
|
} |
|
|
|
#define BNX2FC_FCOE_MAC_METHOD_GRANGED_MAC 1 |
|
#define BNX2FC_FCOE_MAC_METHOD_FCF_MAP 2 |
|
#define BNX2FC_FCOE_MAC_METHOD_FCOE_SET_MAC 3 |
|
static void bnx2fc_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, |
|
void *arg) |
|
{ |
|
struct fcoe_ctlr *fip = arg; |
|
struct fc_exch *exch = fc_seq_exch(seq); |
|
struct fc_lport *lport = exch->lp; |
|
|
|
struct fc_frame_header *fh; |
|
u8 *granted_mac; |
|
u8 fcoe_mac[6]; |
|
u8 fc_map[3]; |
|
int method; |
|
|
|
if (IS_ERR(fp)) |
|
goto done; |
|
|
|
fh = fc_frame_header_get(fp); |
|
granted_mac = fr_cb(fp)->granted_mac; |
|
|
|
/* |
|
* We set the source MAC for FCoE traffic based on the Granted MAC |
|
* address from the switch. |
|
* |
|
* If granted_mac is non-zero, we use that. |
|
* If the granted_mac is zeroed out, create the FCoE MAC based on |
|
* the sel_fcf->fc_map and the d_id fo the FLOGI frame. |
|
* If sel_fcf->fc_map is 0, then we use the default FCF-MAC plus the |
|
* d_id of the FLOGI frame. |
|
*/ |
|
if (!is_zero_ether_addr(granted_mac)) { |
|
ether_addr_copy(fcoe_mac, granted_mac); |
|
method = BNX2FC_FCOE_MAC_METHOD_GRANGED_MAC; |
|
} else if (fip->sel_fcf && fip->sel_fcf->fc_map != 0) { |
|
hton24(fc_map, fip->sel_fcf->fc_map); |
|
fcoe_mac[0] = fc_map[0]; |
|
fcoe_mac[1] = fc_map[1]; |
|
fcoe_mac[2] = fc_map[2]; |
|
fcoe_mac[3] = fh->fh_d_id[0]; |
|
fcoe_mac[4] = fh->fh_d_id[1]; |
|
fcoe_mac[5] = fh->fh_d_id[2]; |
|
method = BNX2FC_FCOE_MAC_METHOD_FCF_MAP; |
|
} else { |
|
fc_fcoe_set_mac(fcoe_mac, fh->fh_d_id); |
|
method = BNX2FC_FCOE_MAC_METHOD_FCOE_SET_MAC; |
|
} |
|
|
|
BNX2FC_HBA_DBG(lport, "fcoe_mac=%pM method=%d\n", fcoe_mac, method); |
|
fip->update_mac(lport, fcoe_mac); |
|
done: |
|
fc_lport_flogi_resp(seq, fp, lport); |
|
} |
|
|
|
static void bnx2fc_logo_resp(struct fc_seq *seq, struct fc_frame *fp, |
|
void *arg) |
|
{ |
|
struct fcoe_ctlr *fip = arg; |
|
struct fc_exch *exch = fc_seq_exch(seq); |
|
struct fc_lport *lport = exch->lp; |
|
static u8 zero_mac[ETH_ALEN] = { 0 }; |
|
|
|
if (!IS_ERR(fp)) |
|
fip->update_mac(lport, zero_mac); |
|
fc_lport_logo_resp(seq, fp, lport); |
|
} |
|
|
|
struct fc_seq *bnx2fc_elsct_send(struct fc_lport *lport, u32 did, |
|
struct fc_frame *fp, unsigned int op, |
|
void (*resp)(struct fc_seq *, |
|
struct fc_frame *, |
|
void *), |
|
void *arg, u32 timeout) |
|
{ |
|
struct fcoe_port *port = lport_priv(lport); |
|
struct bnx2fc_interface *interface = port->priv; |
|
struct fcoe_ctlr *fip = bnx2fc_to_ctlr(interface); |
|
struct fc_frame_header *fh = fc_frame_header_get(fp); |
|
|
|
switch (op) { |
|
case ELS_FLOGI: |
|
case ELS_FDISC: |
|
return fc_elsct_send(lport, did, fp, op, bnx2fc_flogi_resp, |
|
fip, timeout); |
|
case ELS_LOGO: |
|
/* only hook onto fabric logouts, not port logouts */ |
|
if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) |
|
break; |
|
return fc_elsct_send(lport, did, fp, op, bnx2fc_logo_resp, |
|
fip, timeout); |
|
} |
|
return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); |
|
}
|
|
|