--- /dev/null
+/*
+ * bnx2fc_els.c: QLogic NetXtreme II Linux FCoE offload driver.
+ * This file contains helper routines that handle ELS requests
+ * and responses.
+ *
+ * Copyright (c) 2008 - 2013 Broadcom Corporation
+ * Copyright (c) 2014, QLogic Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
+ */
+
+#include "bnx2fc.h"
+
+static void bnx2fc_logo_resp(struct fc_seq *seq, struct fc_frame *fp,
+ void *arg);
+static void bnx2fc_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
+ void *arg);
+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);
+
+static void bnx2fc_rrq_compl(struct bnx2fc_els_cb_arg *cb_arg)
+{
+ struct bnx2fc_cmd *orig_io_req;
+ struct bnx2fc_cmd *rrq_req;
+ int rc = 0;
+
+ BUG_ON(!cb_arg);
+ rrq_req = cb_arg->io_req;
+ orig_io_req = cb_arg->aborted_io_req;
+ BUG_ON(!orig_io_req);
+ BNX2FC_ELS_DBG("rrq_compl: orig xid = 0x%x, rrq_xid = 0x%x\n",
+ orig_io_req->xid, rrq_req->xid);
+
+ kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
+
+ if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &rrq_req->req_flags)) {
+ /*
+ * els req is timed out. cleanup the IO with FW and
+ * drop the completion. Remove from active_cmd_queue.
+ */
+ BNX2FC_ELS_DBG("rrq xid - 0x%x timed out, clean it up\n",
+ rrq_req->xid);
+
+ if (rrq_req->on_active_queue) {
+ list_del_init(&rrq_req->link);
+ rrq_req->on_active_queue = 0;
+ rc = bnx2fc_initiate_cleanup(rrq_req);
+ BUG_ON(rc);
+ }
+ }
+ kfree(cb_arg);
+}
+int bnx2fc_send_rrq(struct bnx2fc_cmd *aborted_io_req)
+{
+
+ struct fc_els_rrq rrq;
+ struct bnx2fc_rport *tgt = aborted_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;
+ unsigned long start = jiffies;
+ int rc;
+
+ BNX2FC_ELS_DBG("Sending RRQ orig_xid = 0x%x\n",
+ aborted_io_req->xid);
+ memset(&rrq, 0, sizeof(rrq));
+
+ cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_NOIO);
+ if (!cb_arg) {
+ printk(KERN_ERR PFX "Unable to allocate cb_arg for RRQ\n");
+ rc = -ENOMEM;
+ goto rrq_err;
+ }
+
+ cb_arg->aborted_io_req = aborted_io_req;
+
+ rrq.rrq_cmd = ELS_RRQ;
+ hton24(rrq.rrq_s_id, sid);
+ rrq.rrq_ox_id = htons(aborted_io_req->xid);
+ rrq.rrq_rx_id = htons(aborted_io_req->task->rxwr_txrd.var_ctx.rx_id);
+
+retry_rrq:
+ rc = bnx2fc_initiate_els(tgt, ELS_RRQ, &rrq, sizeof(rrq),
+ bnx2fc_rrq_compl, cb_arg,
+ r_a_tov);
+ if (rc == -ENOMEM) {
+ if (time_after(jiffies, start + (10 * HZ))) {
+ BNX2FC_ELS_DBG("rrq Failed\n");
+ rc = FAILED;
+ goto rrq_err;
+ }
+ msleep(20);
+ goto retry_rrq;
+ }
+rrq_err:
+ if (rc) {
+ BNX2FC_ELS_DBG("RRQ failed - release orig io req 0x%x\n",
+ aborted_io_req->xid);
+ kfree(cb_arg);
+ spin_lock_bh(&tgt->tgt_lock);
+ kref_put(&aborted_io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+ }
+ return rc;
+}
+
+static void bnx2fc_l2_els_compl(struct bnx2fc_els_cb_arg *cb_arg)
+{
+ struct bnx2fc_cmd *els_req;
+ struct bnx2fc_rport *tgt;
+ struct bnx2fc_mp_req *mp_req;
+ struct fc_frame_header *fc_hdr;
+ unsigned char *buf;
+ void *resp_buf;
+ u32 resp_len, hdr_len;
+ u16 l2_oxid;
+ int frame_len;
+ int rc = 0;
+
+ l2_oxid = cb_arg->l2_oxid;
+ BNX2FC_ELS_DBG("ELS COMPL - l2_oxid = 0x%x\n", l2_oxid);
+
+ els_req = cb_arg->io_req;
+ if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &els_req->req_flags)) {
+ /*
+ * els req is timed out. cleanup the IO with FW and
+ * drop the completion. libfc will handle the els timeout
+ */
+ if (els_req->on_active_queue) {
+ list_del_init(&els_req->link);
+ els_req->on_active_queue = 0;
+ rc = bnx2fc_initiate_cleanup(els_req);
+ BUG_ON(rc);
+ }
+ goto free_arg;
+ }
+
+ tgt = els_req->tgt;
+ mp_req = &(els_req->mp_req);
+ fc_hdr = &(mp_req->resp_fc_hdr);
+ resp_len = mp_req->resp_len;
+ resp_buf = mp_req->resp_buf;
+
+ buf = kzalloc(PAGE_SIZE, GFP_ATOMIC);
+ if (!buf) {
+ printk(KERN_ERR PFX "Unable to alloc mp buf\n");
+ goto free_arg;
+ }
+ hdr_len = sizeof(*fc_hdr);
+ if (hdr_len + resp_len > PAGE_SIZE) {
+ printk(KERN_ERR PFX "l2_els_compl: resp len is "
+ "beyond page size\n");
+ goto free_buf;
+ }
+ memcpy(buf, fc_hdr, hdr_len);
+ memcpy(buf + hdr_len, resp_buf, resp_len);
+ frame_len = hdr_len + resp_len;
+
+ bnx2fc_process_l2_frame_compl(tgt, buf, frame_len, l2_oxid);
+
+free_buf:
+ kfree(buf);
+free_arg:
+ kfree(cb_arg);
+}
+
+int bnx2fc_send_adisc(struct bnx2fc_rport *tgt, struct fc_frame *fp)
+{
+ struct fc_els_adisc *adisc;
+ struct fc_frame_header *fh;
+ struct bnx2fc_els_cb_arg *cb_arg;
+ struct fc_lport *lport = tgt->rdata->local_port;
+ u32 r_a_tov = lport->r_a_tov;
+ int rc;
+
+ fh = fc_frame_header_get(fp);
+ cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
+ if (!cb_arg) {
+ printk(KERN_ERR PFX "Unable to allocate cb_arg for ADISC\n");
+ return -ENOMEM;
+ }
+
+ cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
+
+ BNX2FC_ELS_DBG("send ADISC: l2_oxid = 0x%x\n", cb_arg->l2_oxid);
+ adisc = fc_frame_payload_get(fp, sizeof(*adisc));
+ /* adisc is initialized by libfc */
+ rc = bnx2fc_initiate_els(tgt, ELS_ADISC, adisc, sizeof(*adisc),
+ bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov);
+ if (rc)
+ kfree(cb_arg);
+ return rc;
+}
+
+int bnx2fc_send_logo(struct bnx2fc_rport *tgt, struct fc_frame *fp)
+{
+ struct fc_els_logo *logo;
+ struct fc_frame_header *fh;
+ struct bnx2fc_els_cb_arg *cb_arg;
+ struct fc_lport *lport = tgt->rdata->local_port;
+ u32 r_a_tov = lport->r_a_tov;
+ int rc;
+
+ fh = fc_frame_header_get(fp);
+ cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
+ if (!cb_arg) {
+ printk(KERN_ERR PFX "Unable to allocate cb_arg for LOGO\n");
+ return -ENOMEM;
+ }
+
+ cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
+
+ BNX2FC_ELS_DBG("Send LOGO: l2_oxid = 0x%x\n", cb_arg->l2_oxid);
+ logo = fc_frame_payload_get(fp, sizeof(*logo));
+ /* logo is initialized by libfc */
+ rc = bnx2fc_initiate_els(tgt, ELS_LOGO, logo, sizeof(*logo),
+ bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov);
+ if (rc)
+ kfree(cb_arg);
+ return rc;
+}
+
+int bnx2fc_send_rls(struct bnx2fc_rport *tgt, struct fc_frame *fp)
+{
+ struct fc_els_rls *rls;
+ struct fc_frame_header *fh;
+ struct bnx2fc_els_cb_arg *cb_arg;
+ struct fc_lport *lport = tgt->rdata->local_port;
+ u32 r_a_tov = lport->r_a_tov;
+ int rc;
+
+ fh = fc_frame_header_get(fp);
+ cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
+ if (!cb_arg) {
+ printk(KERN_ERR PFX "Unable to allocate cb_arg for LOGO\n");
+ return -ENOMEM;
+ }
+
+ cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
+
+ rls = fc_frame_payload_get(fp, sizeof(*rls));
+ /* rls is initialized by libfc */
+ rc = bnx2fc_initiate_els(tgt, ELS_RLS, rls, sizeof(*rls),
+ bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov);
+ if (rc)
+ kfree(cb_arg);
+ return rc;
+}
+
+void bnx2fc_srr_compl(struct bnx2fc_els_cb_arg *cb_arg)
+{
+ struct bnx2fc_mp_req *mp_req;
+ struct fc_frame_header *fc_hdr, *fh;
+ struct bnx2fc_cmd *srr_req;
+ struct bnx2fc_cmd *orig_io_req;
+ struct fc_frame *fp;
+ unsigned char *buf;
+ void *resp_buf;
+ u32 resp_len, hdr_len;
+ u8 opcode;
+ int rc = 0;
+
+ orig_io_req = cb_arg->aborted_io_req;
+ srr_req = cb_arg->io_req;
+ if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &srr_req->req_flags)) {
+ /* SRR timedout */
+ BNX2FC_IO_DBG(srr_req, "srr timed out, abort "
+ "orig_io - 0x%x\n",
+ orig_io_req->xid);
+ rc = bnx2fc_initiate_abts(srr_req);
+ if (rc != SUCCESS) {
+ BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts "
+ "failed. issue cleanup\n");
+ bnx2fc_initiate_cleanup(srr_req);
+ }
+ if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags) ||
+ test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) {
+ BNX2FC_IO_DBG(srr_req, "srr_compl:xid 0x%x flags = %lx",
+ orig_io_req->xid, orig_io_req->req_flags);
+ goto srr_compl_done;
+ }
+ orig_io_req->srr_retry++;
+ if (orig_io_req->srr_retry <= SRR_RETRY_COUNT) {
+ struct bnx2fc_rport *tgt = orig_io_req->tgt;
+ spin_unlock_bh(&tgt->tgt_lock);
+ rc = bnx2fc_send_srr(orig_io_req,
+ orig_io_req->srr_offset,
+ orig_io_req->srr_rctl);
+ spin_lock_bh(&tgt->tgt_lock);
+ if (!rc)
+ goto srr_compl_done;
+ }
+
+ rc = bnx2fc_initiate_abts(orig_io_req);
+ if (rc != SUCCESS) {
+ BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts "
+ "failed xid = 0x%x. issue cleanup\n",
+ orig_io_req->xid);
+ bnx2fc_initiate_cleanup(orig_io_req);
+ }
+ goto srr_compl_done;
+ }
+ if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags) ||
+ test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) {
+ BNX2FC_IO_DBG(srr_req, "srr_compl:xid - 0x%x flags = %lx",
+ orig_io_req->xid, orig_io_req->req_flags);
+ goto srr_compl_done;
+ }
+ mp_req = &(srr_req->mp_req);
+ fc_hdr = &(mp_req->resp_fc_hdr);
+ resp_len = mp_req->resp_len;
+ resp_buf = mp_req->resp_buf;
+
+ hdr_len = sizeof(*fc_hdr);
+ buf = kzalloc(PAGE_SIZE, GFP_ATOMIC);
+ if (!buf) {
+ printk(KERN_ERR PFX "srr buf: mem alloc failure\n");
+ goto srr_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);
+ switch (opcode) {
+ case ELS_LS_ACC:
+ BNX2FC_IO_DBG(srr_req, "SRR success\n");
+ break;
+ case ELS_LS_RJT:
+ BNX2FC_IO_DBG(srr_req, "SRR rejected\n");
+ rc = bnx2fc_initiate_abts(orig_io_req);
+ if (rc != SUCCESS) {
+ BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts "
+ "failed xid = 0x%x. issue cleanup\n",
+ orig_io_req->xid);
+ bnx2fc_initiate_cleanup(orig_io_req);
+ }
+ break;
+ default:
+ BNX2FC_IO_DBG(srr_req, "srr compl - invalid opcode = %d\n",
+ opcode);
+ break;
+ }
+ fc_frame_free(fp);
+free_buf:
+ kfree(buf);
+srr_compl_done:
+ kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
+}
+
+void bnx2fc_rec_compl(struct bnx2fc_els_cb_arg *cb_arg)
+{
+ struct bnx2fc_cmd *orig_io_req, *new_io_req;
+ struct bnx2fc_cmd *rec_req;
+ struct bnx2fc_mp_req *mp_req;
+ struct fc_frame_header *fc_hdr, *fh;
+ struct fc_els_ls_rjt *rjt;
+ struct fc_els_rec_acc *acc;
+ struct bnx2fc_rport *tgt;
+ struct fcoe_err_report_entry *err_entry;
+ struct scsi_cmnd *sc_cmd;
+ enum fc_rctl r_ctl;
+ unsigned char *buf;
+ void *resp_buf;
+ struct fc_frame *fp;
+ u8 opcode;
+ u32 offset;
+ u32 e_stat;
+ u32 resp_len, hdr_len;
+ int rc = 0;
+ bool send_seq_clnp = false;
+ bool abort_io = false;
+
+ BNX2FC_MISC_DBG("Entered rec_compl callback\n");
+ rec_req = cb_arg->io_req;
+ orig_io_req = cb_arg->aborted_io_req;
+ BNX2FC_IO_DBG(rec_req, "rec_compl: orig xid = 0x%x", orig_io_req->xid);
+ tgt = orig_io_req->tgt;
+
+ /* Handle REC timeout case */
+ if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &rec_req->req_flags)) {
+ BNX2FC_IO_DBG(rec_req, "timed out, abort "
+ "orig_io - 0x%x\n",
+ orig_io_req->xid);
+ /* els req is timed out. send abts for els */
+ rc = bnx2fc_initiate_abts(rec_req);
+ if (rc != SUCCESS) {
+ BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts "
+ "failed. issue cleanup\n");
+ bnx2fc_initiate_cleanup(rec_req);
+ }
+ orig_io_req->rec_retry++;
+ /* REC timedout. send ABTS to the orig IO req */
+ if (orig_io_req->rec_retry <= REC_RETRY_COUNT) {
+ spin_unlock_bh(&tgt->tgt_lock);
+ rc = bnx2fc_send_rec(orig_io_req);
+ 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);
+rec_err:
+ 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);
+ }
+ 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);
+srr_err:
+ 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);
+
+ 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)) ||
+ (test_bit(BNX2FC_FLAG_EXPL_LOGO, &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;
+
+ 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);
+}
+
+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;
+ u8 *mac;
+ u8 op;
+
+ if (IS_ERR(fp))
+ goto done;
+
+ mac = fr_cb(fp)->granted_mac;
+ if (is_zero_ether_addr(mac)) {
+ op = fc_frame_payload_op(fp);
+ if (lport->vport) {
+ if (op == ELS_LS_RJT) {
+ printk(KERN_ERR PFX "bnx2fc_flogi_resp is LS_RJT\n");
+ fc_vport_terminate(lport->vport);
+ fc_frame_free(fp);
+ return;
+ }
+ }
+ fcoe_ctlr_recv_flogi(fip, lport, fp);
+ }
+ if (!is_zero_ether_addr(mac))
+ fip->update_mac(lport, 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);
+}
Code Review / kvmfornfv.git / blobdiff