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![Lin Yi](/assets/img/avatar_default.png)
If cb_arg alloc failed, we can't release the struct orig_io_req refcount before we take its refcount. As Saurav said, move the srr_err label down to avoid unnecessary refcount release and nullptr free. Signed-off-by: Lin Yi <teroincn@163.com> Acked-by: Saurav Kashyap <skashyap@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
950 lines
26 KiB
C
950 lines
26 KiB
C
/*
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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 (bprakash@broadcom.com)
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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);
|
|
if (!rc)
|
|
goto rec_compl_done;
|
|
}
|
|
rc = bnx2fc_initiate_abts(orig_io_req);
|
|
if (rc != SUCCESS) {
|
|
BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts "
|
|
"failed xid = 0x%x. issue cleanup\n",
|
|
orig_io_req->xid);
|
|
bnx2fc_initiate_cleanup(orig_io_req);
|
|
}
|
|
goto rec_compl_done;
|
|
}
|
|
|
|
if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags)) {
|
|
BNX2FC_IO_DBG(rec_req, "completed"
|
|
"orig_io - 0x%x\n",
|
|
orig_io_req->xid);
|
|
goto rec_compl_done;
|
|
}
|
|
if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) {
|
|
BNX2FC_IO_DBG(rec_req, "abts in prog "
|
|
"orig_io - 0x%x\n",
|
|
orig_io_req->xid);
|
|
goto rec_compl_done;
|
|
}
|
|
|
|
mp_req = &(rec_req->mp_req);
|
|
fc_hdr = &(mp_req->resp_fc_hdr);
|
|
resp_len = mp_req->resp_len;
|
|
acc = resp_buf = mp_req->resp_buf;
|
|
|
|
hdr_len = sizeof(*fc_hdr);
|
|
|
|
buf = kzalloc(PAGE_SIZE, GFP_ATOMIC);
|
|
if (!buf) {
|
|
printk(KERN_ERR PFX "rec buf: mem alloc failure\n");
|
|
goto rec_compl_done;
|
|
}
|
|
memcpy(buf, fc_hdr, hdr_len);
|
|
memcpy(buf + hdr_len, resp_buf, resp_len);
|
|
|
|
fp = fc_frame_alloc(NULL, resp_len);
|
|
if (!fp) {
|
|
printk(KERN_ERR PFX "fc_frame_alloc failure\n");
|
|
goto free_buf;
|
|
}
|
|
|
|
fh = (struct fc_frame_header *) fc_frame_header_get(fp);
|
|
/* Copy FC Frame header and payload into the frame */
|
|
memcpy(fh, buf, hdr_len + resp_len);
|
|
|
|
opcode = fc_frame_payload_op(fp);
|
|
if (opcode == ELS_LS_RJT) {
|
|
BNX2FC_IO_DBG(rec_req, "opcode is RJT\n");
|
|
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
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#define BNX2FC_FCOE_MAC_METHOD_FCF_MAP 2
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#define BNX2FC_FCOE_MAC_METHOD_FCOE_SET_MAC 3
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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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{
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struct fcoe_ctlr *fip = arg;
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struct fc_exch *exch = fc_seq_exch(seq);
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|
struct fc_lport *lport = exch->lp;
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|
|
|
struct fc_frame_header *fh;
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|
u8 *granted_mac;
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u8 fcoe_mac[6];
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|
u8 fc_map[3];
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|
int method;
|
|
|
|
if (IS_ERR(fp))
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|
goto done;
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|
|
|
fh = fc_frame_header_get(fp);
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|
granted_mac = fr_cb(fp)->granted_mac;
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|
|
|
/*
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|
* We set the source MAC for FCoE traffic based on the Granted MAC
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* address from the switch.
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|
*
|
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* If granted_mac is non-zero, we use that.
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|
* 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.
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|
* If sel_fcf->fc_map is 0, then we use the default FCF-MAC plus the
|
|
* d_id of the FLOGI frame.
|
|
*/
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|
if (!is_zero_ether_addr(granted_mac)) {
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ether_addr_copy(fcoe_mac, granted_mac);
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|
method = BNX2FC_FCOE_MAC_METHOD_GRANGED_MAC;
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} else if (fip->sel_fcf && fip->sel_fcf->fc_map != 0) {
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|
hton24(fc_map, fip->sel_fcf->fc_map);
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|
fcoe_mac[0] = fc_map[0];
|
|
fcoe_mac[1] = fc_map[1];
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|
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];
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|
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);
|
|
}
|