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1409 lines
38 KiB
1409 lines
38 KiB
/* |
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* Copyright 2008 Cisco Systems, Inc. All rights reserved. |
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* Copyright 2007 Nuova Systems, Inc. All rights reserved. |
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* |
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* This program is free software; you may 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; version 2 of the License. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#include <linux/errno.h> |
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#include <linux/pci.h> |
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#include <linux/slab.h> |
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#include <linux/skbuff.h> |
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#include <linux/interrupt.h> |
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#include <linux/spinlock.h> |
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#include <linux/if_ether.h> |
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#include <linux/if_vlan.h> |
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#include <linux/workqueue.h> |
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#include <scsi/fc/fc_fip.h> |
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#include <scsi/fc/fc_els.h> |
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#include <scsi/fc/fc_fcoe.h> |
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#include <scsi/fc_frame.h> |
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#include <scsi/libfc.h> |
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#include "fnic_io.h" |
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#include "fnic.h" |
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#include "fnic_fip.h" |
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#include "cq_enet_desc.h" |
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#include "cq_exch_desc.h" |
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|
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static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
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struct workqueue_struct *fnic_fip_queue; |
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struct workqueue_struct *fnic_event_queue; |
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|
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static void fnic_set_eth_mode(struct fnic *); |
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static void fnic_fcoe_send_vlan_req(struct fnic *fnic); |
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static void fnic_fcoe_start_fcf_disc(struct fnic *fnic); |
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static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *); |
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static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag); |
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static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb); |
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|
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void fnic_handle_link(struct work_struct *work) |
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{ |
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struct fnic *fnic = container_of(work, struct fnic, link_work); |
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unsigned long flags; |
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int old_link_status; |
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u32 old_link_down_cnt; |
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u64 old_port_speed, new_port_speed; |
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|
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spin_lock_irqsave(&fnic->fnic_lock, flags); |
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|
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fnic->link_events = 1; /* less work to just set everytime*/ |
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|
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if (fnic->stop_rx_link_events) { |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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return; |
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} |
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|
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old_link_down_cnt = fnic->link_down_cnt; |
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old_link_status = fnic->link_status; |
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old_port_speed = atomic64_read( |
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&fnic->fnic_stats.misc_stats.current_port_speed); |
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|
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fnic->link_status = vnic_dev_link_status(fnic->vdev); |
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fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev); |
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|
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new_port_speed = vnic_dev_port_speed(fnic->vdev); |
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atomic64_set(&fnic->fnic_stats.misc_stats.current_port_speed, |
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new_port_speed); |
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if (old_port_speed != new_port_speed) |
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FNIC_MAIN_DBG(KERN_INFO, fnic->lport->host, |
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"Current vnic speed set to : %llu\n", |
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new_port_speed); |
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|
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switch (vnic_dev_port_speed(fnic->vdev)) { |
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case DCEM_PORTSPEED_10G: |
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fc_host_speed(fnic->lport->host) = FC_PORTSPEED_10GBIT; |
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fnic->lport->link_supported_speeds = FC_PORTSPEED_10GBIT; |
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break; |
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case DCEM_PORTSPEED_20G: |
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fc_host_speed(fnic->lport->host) = FC_PORTSPEED_20GBIT; |
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fnic->lport->link_supported_speeds = FC_PORTSPEED_20GBIT; |
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break; |
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case DCEM_PORTSPEED_25G: |
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fc_host_speed(fnic->lport->host) = FC_PORTSPEED_25GBIT; |
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fnic->lport->link_supported_speeds = FC_PORTSPEED_25GBIT; |
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break; |
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case DCEM_PORTSPEED_40G: |
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case DCEM_PORTSPEED_4x10G: |
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fc_host_speed(fnic->lport->host) = FC_PORTSPEED_40GBIT; |
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fnic->lport->link_supported_speeds = FC_PORTSPEED_40GBIT; |
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break; |
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case DCEM_PORTSPEED_100G: |
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fc_host_speed(fnic->lport->host) = FC_PORTSPEED_100GBIT; |
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fnic->lport->link_supported_speeds = FC_PORTSPEED_100GBIT; |
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break; |
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default: |
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fc_host_speed(fnic->lport->host) = FC_PORTSPEED_UNKNOWN; |
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fnic->lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN; |
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break; |
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} |
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|
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if (old_link_status == fnic->link_status) { |
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if (!fnic->link_status) { |
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/* DOWN -> DOWN */ |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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fnic_fc_trace_set_data(fnic->lport->host->host_no, |
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FNIC_FC_LE, "Link Status: DOWN->DOWN", |
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strlen("Link Status: DOWN->DOWN")); |
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} else { |
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if (old_link_down_cnt != fnic->link_down_cnt) { |
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/* UP -> DOWN -> UP */ |
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fnic->lport->host_stats.link_failure_count++; |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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fnic_fc_trace_set_data( |
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fnic->lport->host->host_no, |
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FNIC_FC_LE, |
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"Link Status:UP_DOWN_UP", |
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strlen("Link_Status:UP_DOWN_UP") |
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); |
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FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
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"link down\n"); |
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fcoe_ctlr_link_down(&fnic->ctlr); |
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if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
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/* start FCoE VLAN discovery */ |
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fnic_fc_trace_set_data( |
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fnic->lport->host->host_no, |
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FNIC_FC_LE, |
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"Link Status: UP_DOWN_UP_VLAN", |
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strlen( |
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"Link Status: UP_DOWN_UP_VLAN") |
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); |
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fnic_fcoe_send_vlan_req(fnic); |
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return; |
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} |
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FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
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"link up\n"); |
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fcoe_ctlr_link_up(&fnic->ctlr); |
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} else { |
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/* UP -> UP */ |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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fnic_fc_trace_set_data( |
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fnic->lport->host->host_no, FNIC_FC_LE, |
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"Link Status: UP_UP", |
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strlen("Link Status: UP_UP")); |
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} |
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} |
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} else if (fnic->link_status) { |
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/* DOWN -> UP */ |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
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/* start FCoE VLAN discovery */ |
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fnic_fc_trace_set_data( |
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fnic->lport->host->host_no, |
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FNIC_FC_LE, "Link Status: DOWN_UP_VLAN", |
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strlen("Link Status: DOWN_UP_VLAN")); |
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fnic_fcoe_send_vlan_req(fnic); |
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return; |
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} |
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FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n"); |
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fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE, |
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"Link Status: DOWN_UP", strlen("Link Status: DOWN_UP")); |
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fcoe_ctlr_link_up(&fnic->ctlr); |
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} else { |
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/* UP -> DOWN */ |
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fnic->lport->host_stats.link_failure_count++; |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n"); |
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fnic_fc_trace_set_data( |
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fnic->lport->host->host_no, FNIC_FC_LE, |
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"Link Status: UP_DOWN", |
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strlen("Link Status: UP_DOWN")); |
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if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
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FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
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"deleting fip-timer during link-down\n"); |
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del_timer_sync(&fnic->fip_timer); |
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} |
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fcoe_ctlr_link_down(&fnic->ctlr); |
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} |
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|
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} |
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|
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/* |
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* This function passes incoming fabric frames to libFC |
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*/ |
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void fnic_handle_frame(struct work_struct *work) |
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{ |
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struct fnic *fnic = container_of(work, struct fnic, frame_work); |
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struct fc_lport *lp = fnic->lport; |
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unsigned long flags; |
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struct sk_buff *skb; |
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struct fc_frame *fp; |
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|
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while ((skb = skb_dequeue(&fnic->frame_queue))) { |
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|
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spin_lock_irqsave(&fnic->fnic_lock, flags); |
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if (fnic->stop_rx_link_events) { |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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dev_kfree_skb(skb); |
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return; |
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} |
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fp = (struct fc_frame *)skb; |
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|
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/* |
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* If we're in a transitional state, just re-queue and return. |
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* The queue will be serviced when we get to a stable state. |
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*/ |
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if (fnic->state != FNIC_IN_FC_MODE && |
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fnic->state != FNIC_IN_ETH_MODE) { |
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skb_queue_head(&fnic->frame_queue, skb); |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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return; |
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} |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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|
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fc_exch_recv(lp, fp); |
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} |
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} |
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|
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void fnic_fcoe_evlist_free(struct fnic *fnic) |
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{ |
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struct fnic_event *fevt = NULL; |
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struct fnic_event *next = NULL; |
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unsigned long flags; |
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|
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spin_lock_irqsave(&fnic->fnic_lock, flags); |
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if (list_empty(&fnic->evlist)) { |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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return; |
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} |
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|
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list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
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list_del(&fevt->list); |
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kfree(fevt); |
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} |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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} |
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|
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void fnic_handle_event(struct work_struct *work) |
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{ |
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struct fnic *fnic = container_of(work, struct fnic, event_work); |
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struct fnic_event *fevt = NULL; |
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struct fnic_event *next = NULL; |
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unsigned long flags; |
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|
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spin_lock_irqsave(&fnic->fnic_lock, flags); |
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if (list_empty(&fnic->evlist)) { |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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return; |
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} |
|
|
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list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
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if (fnic->stop_rx_link_events) { |
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list_del(&fevt->list); |
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kfree(fevt); |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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return; |
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} |
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/* |
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* If we're in a transitional state, just re-queue and return. |
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* The queue will be serviced when we get to a stable state. |
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*/ |
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if (fnic->state != FNIC_IN_FC_MODE && |
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fnic->state != FNIC_IN_ETH_MODE) { |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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return; |
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} |
|
|
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list_del(&fevt->list); |
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switch (fevt->event) { |
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case FNIC_EVT_START_VLAN_DISC: |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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fnic_fcoe_send_vlan_req(fnic); |
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spin_lock_irqsave(&fnic->fnic_lock, flags); |
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break; |
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case FNIC_EVT_START_FCF_DISC: |
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FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
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"Start FCF Discovery\n"); |
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fnic_fcoe_start_fcf_disc(fnic); |
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break; |
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default: |
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FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
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"Unknown event 0x%x\n", fevt->event); |
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break; |
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} |
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kfree(fevt); |
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} |
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spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
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} |
|
|
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/** |
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* is_fnic_fip_flogi_reject() - Check if the Received FIP FLOGI frame is rejected |
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* @fip: The FCoE controller that received the frame |
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* @skb: The received FIP frame |
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* |
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* Returns non-zero if the frame is rejected with unsupported cmd with |
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* insufficient resource els explanation. |
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*/ |
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static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip, |
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struct sk_buff *skb) |
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{ |
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struct fc_lport *lport = fip->lp; |
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struct fip_header *fiph; |
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struct fc_frame_header *fh = NULL; |
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struct fip_desc *desc; |
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struct fip_encaps *els; |
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u16 op; |
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u8 els_op; |
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u8 sub; |
|
|
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size_t rlen; |
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size_t dlen = 0; |
|
|
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if (skb_linearize(skb)) |
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return 0; |
|
|
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if (skb->len < sizeof(*fiph)) |
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return 0; |
|
|
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fiph = (struct fip_header *)skb->data; |
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op = ntohs(fiph->fip_op); |
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sub = fiph->fip_subcode; |
|
|
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if (op != FIP_OP_LS) |
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return 0; |
|
|
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if (sub != FIP_SC_REP) |
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return 0; |
|
|
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rlen = ntohs(fiph->fip_dl_len) * 4; |
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if (rlen + sizeof(*fiph) > skb->len) |
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return 0; |
|
|
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desc = (struct fip_desc *)(fiph + 1); |
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dlen = desc->fip_dlen * FIP_BPW; |
|
|
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if (desc->fip_dtype == FIP_DT_FLOGI) { |
|
|
|
if (dlen < sizeof(*els) + sizeof(*fh) + 1) |
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return 0; |
|
|
|
els = (struct fip_encaps *)desc; |
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fh = (struct fc_frame_header *)(els + 1); |
|
|
|
if (!fh) |
|
return 0; |
|
|
|
/* |
|
* ELS command code, reason and explanation should be = Reject, |
|
* unsupported command and insufficient resource |
|
*/ |
|
els_op = *(u8 *)(fh + 1); |
|
if (els_op == ELS_LS_RJT) { |
|
shost_printk(KERN_INFO, lport->host, |
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"Flogi Request Rejected by Switch\n"); |
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return 1; |
|
} |
|
shost_printk(KERN_INFO, lport->host, |
|
"Flogi Request Accepted by Switch\n"); |
|
} |
|
return 0; |
|
} |
|
|
|
static void fnic_fcoe_send_vlan_req(struct fnic *fnic) |
|
{ |
|
struct fcoe_ctlr *fip = &fnic->ctlr; |
|
struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
|
struct sk_buff *skb; |
|
char *eth_fr; |
|
struct fip_vlan *vlan; |
|
u64 vlan_tov; |
|
|
|
fnic_fcoe_reset_vlans(fnic); |
|
fnic->set_vlan(fnic, 0); |
|
|
|
if (printk_ratelimit()) |
|
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
|
"Sending VLAN request...\n"); |
|
|
|
skb = dev_alloc_skb(sizeof(struct fip_vlan)); |
|
if (!skb) |
|
return; |
|
|
|
eth_fr = (char *)skb->data; |
|
vlan = (struct fip_vlan *)eth_fr; |
|
|
|
memset(vlan, 0, sizeof(*vlan)); |
|
memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
|
memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN); |
|
vlan->eth.h_proto = htons(ETH_P_FIP); |
|
|
|
vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); |
|
vlan->fip.fip_op = htons(FIP_OP_VLAN); |
|
vlan->fip.fip_subcode = FIP_SC_VL_REQ; |
|
vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW); |
|
|
|
vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; |
|
vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW; |
|
memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); |
|
|
|
vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; |
|
vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW; |
|
put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn); |
|
atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs); |
|
|
|
skb_put(skb, sizeof(*vlan)); |
|
skb->protocol = htons(ETH_P_FIP); |
|
skb_reset_mac_header(skb); |
|
skb_reset_network_header(skb); |
|
fip->send(fip, skb); |
|
|
|
/* set a timer so that we can retry if there no response */ |
|
vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV); |
|
mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov)); |
|
} |
|
|
|
static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb) |
|
{ |
|
struct fcoe_ctlr *fip = &fnic->ctlr; |
|
struct fip_header *fiph; |
|
struct fip_desc *desc; |
|
struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
|
u16 vid; |
|
size_t rlen; |
|
size_t dlen; |
|
struct fcoe_vlan *vlan; |
|
u64 sol_time; |
|
unsigned long flags; |
|
|
|
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
|
"Received VLAN response...\n"); |
|
|
|
fiph = (struct fip_header *) skb->data; |
|
|
|
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
|
"Received VLAN response... OP 0x%x SUB_OP 0x%x\n", |
|
ntohs(fiph->fip_op), fiph->fip_subcode); |
|
|
|
rlen = ntohs(fiph->fip_dl_len) * 4; |
|
fnic_fcoe_reset_vlans(fnic); |
|
spin_lock_irqsave(&fnic->vlans_lock, flags); |
|
desc = (struct fip_desc *)(fiph + 1); |
|
while (rlen > 0) { |
|
dlen = desc->fip_dlen * FIP_BPW; |
|
switch (desc->fip_dtype) { |
|
case FIP_DT_VLAN: |
|
vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan); |
|
shost_printk(KERN_INFO, fnic->lport->host, |
|
"process_vlan_resp: FIP VLAN %d\n", vid); |
|
vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); |
|
if (!vlan) { |
|
/* retry from timer */ |
|
spin_unlock_irqrestore(&fnic->vlans_lock, |
|
flags); |
|
goto out; |
|
} |
|
vlan->vid = vid & 0x0fff; |
|
vlan->state = FIP_VLAN_AVAIL; |
|
list_add_tail(&vlan->list, &fnic->vlans); |
|
break; |
|
} |
|
desc = (struct fip_desc *)((char *)desc + dlen); |
|
rlen -= dlen; |
|
} |
|
|
|
/* any VLAN descriptors present ? */ |
|
if (list_empty(&fnic->vlans)) { |
|
/* retry from timer */ |
|
atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID); |
|
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
|
"No VLAN descriptors in FIP VLAN response\n"); |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
goto out; |
|
} |
|
|
|
vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
|
fnic->set_vlan(fnic, vlan->vid); |
|
vlan->state = FIP_VLAN_SENT; /* sent now */ |
|
vlan->sol_count++; |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
|
|
/* start the solicitation */ |
|
fcoe_ctlr_link_up(fip); |
|
|
|
sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
|
mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); |
|
out: |
|
return; |
|
} |
|
|
|
static void fnic_fcoe_start_fcf_disc(struct fnic *fnic) |
|
{ |
|
unsigned long flags; |
|
struct fcoe_vlan *vlan; |
|
u64 sol_time; |
|
|
|
spin_lock_irqsave(&fnic->vlans_lock, flags); |
|
vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
|
fnic->set_vlan(fnic, vlan->vid); |
|
vlan->state = FIP_VLAN_SENT; /* sent now */ |
|
vlan->sol_count = 1; |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
|
|
/* start the solicitation */ |
|
fcoe_ctlr_link_up(&fnic->ctlr); |
|
|
|
sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
|
mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); |
|
} |
|
|
|
static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag) |
|
{ |
|
unsigned long flags; |
|
struct fcoe_vlan *fvlan; |
|
|
|
spin_lock_irqsave(&fnic->vlans_lock, flags); |
|
if (list_empty(&fnic->vlans)) { |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
return -EINVAL; |
|
} |
|
|
|
fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
|
if (fvlan->state == FIP_VLAN_USED) { |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
return 0; |
|
} |
|
|
|
if (fvlan->state == FIP_VLAN_SENT) { |
|
fvlan->state = FIP_VLAN_USED; |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
return 0; |
|
} |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
return -EINVAL; |
|
} |
|
|
|
static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev) |
|
{ |
|
struct fnic_event *fevt; |
|
unsigned long flags; |
|
|
|
fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC); |
|
if (!fevt) |
|
return; |
|
|
|
fevt->fnic = fnic; |
|
fevt->event = ev; |
|
|
|
spin_lock_irqsave(&fnic->fnic_lock, flags); |
|
list_add_tail(&fevt->list, &fnic->evlist); |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
|
|
schedule_work(&fnic->event_work); |
|
} |
|
|
|
static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb) |
|
{ |
|
struct fip_header *fiph; |
|
int ret = 1; |
|
u16 op; |
|
u8 sub; |
|
|
|
if (!skb || !(skb->data)) |
|
return -1; |
|
|
|
if (skb_linearize(skb)) |
|
goto drop; |
|
|
|
fiph = (struct fip_header *)skb->data; |
|
op = ntohs(fiph->fip_op); |
|
sub = fiph->fip_subcode; |
|
|
|
if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
|
goto drop; |
|
|
|
if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) |
|
goto drop; |
|
|
|
if (op == FIP_OP_DISC && sub == FIP_SC_ADV) { |
|
if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags))) |
|
goto drop; |
|
/* pass it on to fcoe */ |
|
ret = 1; |
|
} else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) { |
|
/* set the vlan as used */ |
|
fnic_fcoe_process_vlan_resp(fnic, skb); |
|
ret = 0; |
|
} else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) { |
|
/* received CVL request, restart vlan disc */ |
|
fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
|
/* pass it on to fcoe */ |
|
ret = 1; |
|
} |
|
drop: |
|
return ret; |
|
} |
|
|
|
void fnic_handle_fip_frame(struct work_struct *work) |
|
{ |
|
struct fnic *fnic = container_of(work, struct fnic, fip_frame_work); |
|
struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
|
unsigned long flags; |
|
struct sk_buff *skb; |
|
struct ethhdr *eh; |
|
|
|
while ((skb = skb_dequeue(&fnic->fip_frame_queue))) { |
|
spin_lock_irqsave(&fnic->fnic_lock, flags); |
|
if (fnic->stop_rx_link_events) { |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
dev_kfree_skb(skb); |
|
return; |
|
} |
|
/* |
|
* If we're in a transitional state, just re-queue and return. |
|
* The queue will be serviced when we get to a stable state. |
|
*/ |
|
if (fnic->state != FNIC_IN_FC_MODE && |
|
fnic->state != FNIC_IN_ETH_MODE) { |
|
skb_queue_head(&fnic->fip_frame_queue, skb); |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
return; |
|
} |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
eh = (struct ethhdr *)skb->data; |
|
if (eh->h_proto == htons(ETH_P_FIP)) { |
|
skb_pull(skb, sizeof(*eh)); |
|
if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) { |
|
dev_kfree_skb(skb); |
|
continue; |
|
} |
|
/* |
|
* If there's FLOGI rejects - clear all |
|
* fcf's & restart from scratch |
|
*/ |
|
if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) { |
|
atomic64_inc( |
|
&fnic_stats->vlan_stats.flogi_rejects); |
|
shost_printk(KERN_INFO, fnic->lport->host, |
|
"Trigger a Link down - VLAN Disc\n"); |
|
fcoe_ctlr_link_down(&fnic->ctlr); |
|
/* start FCoE VLAN discovery */ |
|
fnic_fcoe_send_vlan_req(fnic); |
|
dev_kfree_skb(skb); |
|
continue; |
|
} |
|
fcoe_ctlr_recv(&fnic->ctlr, skb); |
|
continue; |
|
} |
|
} |
|
} |
|
|
|
/** |
|
* fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame. |
|
* @fnic: fnic instance. |
|
* @skb: Ethernet Frame. |
|
*/ |
|
static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb) |
|
{ |
|
struct fc_frame *fp; |
|
struct ethhdr *eh; |
|
struct fcoe_hdr *fcoe_hdr; |
|
struct fcoe_crc_eof *ft; |
|
|
|
/* |
|
* Undo VLAN encapsulation if present. |
|
*/ |
|
eh = (struct ethhdr *)skb->data; |
|
if (eh->h_proto == htons(ETH_P_8021Q)) { |
|
memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2); |
|
eh = skb_pull(skb, VLAN_HLEN); |
|
skb_reset_mac_header(skb); |
|
} |
|
if (eh->h_proto == htons(ETH_P_FIP)) { |
|
if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) { |
|
printk(KERN_ERR "Dropped FIP frame, as firmware " |
|
"uses non-FIP mode, Enable FIP " |
|
"using UCSM\n"); |
|
goto drop; |
|
} |
|
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, |
|
FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) { |
|
printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
|
} |
|
skb_queue_tail(&fnic->fip_frame_queue, skb); |
|
queue_work(fnic_fip_queue, &fnic->fip_frame_work); |
|
return 1; /* let caller know packet was used */ |
|
} |
|
if (eh->h_proto != htons(ETH_P_FCOE)) |
|
goto drop; |
|
skb_set_network_header(skb, sizeof(*eh)); |
|
skb_pull(skb, sizeof(*eh)); |
|
|
|
fcoe_hdr = (struct fcoe_hdr *)skb->data; |
|
if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER) |
|
goto drop; |
|
|
|
fp = (struct fc_frame *)skb; |
|
fc_frame_init(fp); |
|
fr_sof(fp) = fcoe_hdr->fcoe_sof; |
|
skb_pull(skb, sizeof(struct fcoe_hdr)); |
|
skb_reset_transport_header(skb); |
|
|
|
ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft)); |
|
fr_eof(fp) = ft->fcoe_eof; |
|
skb_trim(skb, skb->len - sizeof(*ft)); |
|
return 0; |
|
drop: |
|
dev_kfree_skb_irq(skb); |
|
return -1; |
|
} |
|
|
|
/** |
|
* fnic_update_mac_locked() - set data MAC address and filters. |
|
* @fnic: fnic instance. |
|
* @new: newly-assigned FCoE MAC address. |
|
* |
|
* Called with the fnic lock held. |
|
*/ |
|
void fnic_update_mac_locked(struct fnic *fnic, u8 *new) |
|
{ |
|
u8 *ctl = fnic->ctlr.ctl_src_addr; |
|
u8 *data = fnic->data_src_addr; |
|
|
|
if (is_zero_ether_addr(new)) |
|
new = ctl; |
|
if (ether_addr_equal(data, new)) |
|
return; |
|
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new); |
|
if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl)) |
|
vnic_dev_del_addr(fnic->vdev, data); |
|
memcpy(data, new, ETH_ALEN); |
|
if (!ether_addr_equal(new, ctl)) |
|
vnic_dev_add_addr(fnic->vdev, new); |
|
} |
|
|
|
/** |
|
* fnic_update_mac() - set data MAC address and filters. |
|
* @lport: local port. |
|
* @new: newly-assigned FCoE MAC address. |
|
*/ |
|
void fnic_update_mac(struct fc_lport *lport, u8 *new) |
|
{ |
|
struct fnic *fnic = lport_priv(lport); |
|
|
|
spin_lock_irq(&fnic->fnic_lock); |
|
fnic_update_mac_locked(fnic, new); |
|
spin_unlock_irq(&fnic->fnic_lock); |
|
} |
|
|
|
/** |
|
* fnic_set_port_id() - set the port_ID after successful FLOGI. |
|
* @lport: local port. |
|
* @port_id: assigned FC_ID. |
|
* @fp: received frame containing the FLOGI accept or NULL. |
|
* |
|
* This is called from libfc when a new FC_ID has been assigned. |
|
* This causes us to reset the firmware to FC_MODE and setup the new MAC |
|
* address and FC_ID. |
|
* |
|
* It is also called with FC_ID 0 when we're logged off. |
|
* |
|
* If the FC_ID is due to point-to-point, fp may be NULL. |
|
*/ |
|
void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp) |
|
{ |
|
struct fnic *fnic = lport_priv(lport); |
|
u8 *mac; |
|
int ret; |
|
|
|
FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n", |
|
port_id, fp); |
|
|
|
/* |
|
* If we're clearing the FC_ID, change to use the ctl_src_addr. |
|
* Set ethernet mode to send FLOGI. |
|
*/ |
|
if (!port_id) { |
|
fnic_update_mac(lport, fnic->ctlr.ctl_src_addr); |
|
fnic_set_eth_mode(fnic); |
|
return; |
|
} |
|
|
|
if (fp) { |
|
mac = fr_cb(fp)->granted_mac; |
|
if (is_zero_ether_addr(mac)) { |
|
/* non-FIP - FLOGI already accepted - ignore return */ |
|
fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp); |
|
} |
|
fnic_update_mac(lport, mac); |
|
} |
|
|
|
/* Change state to reflect transition to FC mode */ |
|
spin_lock_irq(&fnic->fnic_lock); |
|
if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE) |
|
fnic->state = FNIC_IN_ETH_TRANS_FC_MODE; |
|
else { |
|
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
|
"Unexpected fnic state %s while" |
|
" processing flogi resp\n", |
|
fnic_state_to_str(fnic->state)); |
|
spin_unlock_irq(&fnic->fnic_lock); |
|
return; |
|
} |
|
spin_unlock_irq(&fnic->fnic_lock); |
|
|
|
/* |
|
* Send FLOGI registration to firmware to set up FC mode. |
|
* The new address will be set up when registration completes. |
|
*/ |
|
ret = fnic_flogi_reg_handler(fnic, port_id); |
|
|
|
if (ret < 0) { |
|
spin_lock_irq(&fnic->fnic_lock); |
|
if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) |
|
fnic->state = FNIC_IN_ETH_MODE; |
|
spin_unlock_irq(&fnic->fnic_lock); |
|
} |
|
} |
|
|
|
static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc |
|
*cq_desc, struct vnic_rq_buf *buf, |
|
int skipped __attribute__((unused)), |
|
void *opaque) |
|
{ |
|
struct fnic *fnic = vnic_dev_priv(rq->vdev); |
|
struct sk_buff *skb; |
|
struct fc_frame *fp; |
|
struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
|
u8 type, color, eop, sop, ingress_port, vlan_stripped; |
|
u8 fcoe = 0, fcoe_sof, fcoe_eof; |
|
u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0; |
|
u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; |
|
u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc; |
|
u8 fcs_ok = 1, packet_error = 0; |
|
u16 q_number, completed_index, bytes_written = 0, vlan, checksum; |
|
u32 rss_hash; |
|
u16 exchange_id, tmpl; |
|
u8 sof = 0; |
|
u8 eof = 0; |
|
u32 fcp_bytes_written = 0; |
|
unsigned long flags; |
|
|
|
dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len, |
|
DMA_FROM_DEVICE); |
|
skb = buf->os_buf; |
|
fp = (struct fc_frame *)skb; |
|
buf->os_buf = NULL; |
|
|
|
cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index); |
|
if (type == CQ_DESC_TYPE_RQ_FCP) { |
|
cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc, |
|
&type, &color, &q_number, &completed_index, |
|
&eop, &sop, &fcoe_fc_crc_ok, &exchange_id, |
|
&tmpl, &fcp_bytes_written, &sof, &eof, |
|
&ingress_port, &packet_error, |
|
&fcoe_enc_error, &fcs_ok, &vlan_stripped, |
|
&vlan); |
|
skb_trim(skb, fcp_bytes_written); |
|
fr_sof(fp) = sof; |
|
fr_eof(fp) = eof; |
|
|
|
} else if (type == CQ_DESC_TYPE_RQ_ENET) { |
|
cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, |
|
&type, &color, &q_number, &completed_index, |
|
&ingress_port, &fcoe, &eop, &sop, |
|
&rss_type, &csum_not_calc, &rss_hash, |
|
&bytes_written, &packet_error, |
|
&vlan_stripped, &vlan, &checksum, |
|
&fcoe_sof, &fcoe_fc_crc_ok, |
|
&fcoe_enc_error, &fcoe_eof, |
|
&tcp_udp_csum_ok, &udp, &tcp, |
|
&ipv4_csum_ok, &ipv6, &ipv4, |
|
&ipv4_fragment, &fcs_ok); |
|
skb_trim(skb, bytes_written); |
|
if (!fcs_ok) { |
|
atomic64_inc(&fnic_stats->misc_stats.frame_errors); |
|
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
|
"fcs error. dropping packet.\n"); |
|
goto drop; |
|
} |
|
if (fnic_import_rq_eth_pkt(fnic, skb)) |
|
return; |
|
|
|
} else { |
|
/* wrong CQ type*/ |
|
shost_printk(KERN_ERR, fnic->lport->host, |
|
"fnic rq_cmpl wrong cq type x%x\n", type); |
|
goto drop; |
|
} |
|
|
|
if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) { |
|
atomic64_inc(&fnic_stats->misc_stats.frame_errors); |
|
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
|
"fnic rq_cmpl fcoe x%x fcsok x%x" |
|
" pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err" |
|
" x%x\n", |
|
fcoe, fcs_ok, packet_error, |
|
fcoe_fc_crc_ok, fcoe_enc_error); |
|
goto drop; |
|
} |
|
|
|
spin_lock_irqsave(&fnic->fnic_lock, flags); |
|
if (fnic->stop_rx_link_events) { |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
goto drop; |
|
} |
|
fr_dev(fp) = fnic->lport; |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV, |
|
(char *)skb->data, skb->len)) != 0) { |
|
printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
|
} |
|
|
|
skb_queue_tail(&fnic->frame_queue, skb); |
|
queue_work(fnic_event_queue, &fnic->frame_work); |
|
|
|
return; |
|
drop: |
|
dev_kfree_skb_irq(skb); |
|
} |
|
|
|
static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev, |
|
struct cq_desc *cq_desc, u8 type, |
|
u16 q_number, u16 completed_index, |
|
void *opaque) |
|
{ |
|
struct fnic *fnic = vnic_dev_priv(vdev); |
|
|
|
vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index, |
|
VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv, |
|
NULL); |
|
return 0; |
|
} |
|
|
|
int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do) |
|
{ |
|
unsigned int tot_rq_work_done = 0, cur_work_done; |
|
unsigned int i; |
|
int err; |
|
|
|
for (i = 0; i < fnic->rq_count; i++) { |
|
cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do, |
|
fnic_rq_cmpl_handler_cont, |
|
NULL); |
|
if (cur_work_done) { |
|
err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); |
|
if (err) |
|
shost_printk(KERN_ERR, fnic->lport->host, |
|
"fnic_alloc_rq_frame can't alloc" |
|
" frame\n"); |
|
} |
|
tot_rq_work_done += cur_work_done; |
|
} |
|
|
|
return tot_rq_work_done; |
|
} |
|
|
|
/* |
|
* This function is called once at init time to allocate and fill RQ |
|
* buffers. Subsequently, it is called in the interrupt context after RQ |
|
* buffer processing to replenish the buffers in the RQ |
|
*/ |
|
int fnic_alloc_rq_frame(struct vnic_rq *rq) |
|
{ |
|
struct fnic *fnic = vnic_dev_priv(rq->vdev); |
|
struct sk_buff *skb; |
|
u16 len; |
|
dma_addr_t pa; |
|
int r; |
|
|
|
len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM; |
|
skb = dev_alloc_skb(len); |
|
if (!skb) { |
|
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
|
"Unable to allocate RQ sk_buff\n"); |
|
return -ENOMEM; |
|
} |
|
skb_reset_mac_header(skb); |
|
skb_reset_transport_header(skb); |
|
skb_reset_network_header(skb); |
|
skb_put(skb, len); |
|
pa = dma_map_single(&fnic->pdev->dev, skb->data, len, DMA_FROM_DEVICE); |
|
if (dma_mapping_error(&fnic->pdev->dev, pa)) { |
|
r = -ENOMEM; |
|
printk(KERN_ERR "PCI mapping failed with error %d\n", r); |
|
goto free_skb; |
|
} |
|
|
|
fnic_queue_rq_desc(rq, skb, pa, len); |
|
return 0; |
|
|
|
free_skb: |
|
kfree_skb(skb); |
|
return r; |
|
} |
|
|
|
void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) |
|
{ |
|
struct fc_frame *fp = buf->os_buf; |
|
struct fnic *fnic = vnic_dev_priv(rq->vdev); |
|
|
|
dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len, |
|
DMA_FROM_DEVICE); |
|
|
|
dev_kfree_skb(fp_skb(fp)); |
|
buf->os_buf = NULL; |
|
} |
|
|
|
/** |
|
* fnic_eth_send() - Send Ethernet frame. |
|
* @fip: fcoe_ctlr instance. |
|
* @skb: Ethernet Frame, FIP, without VLAN encapsulation. |
|
*/ |
|
void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb) |
|
{ |
|
struct fnic *fnic = fnic_from_ctlr(fip); |
|
struct vnic_wq *wq = &fnic->wq[0]; |
|
dma_addr_t pa; |
|
struct ethhdr *eth_hdr; |
|
struct vlan_ethhdr *vlan_hdr; |
|
unsigned long flags; |
|
|
|
if (!fnic->vlan_hw_insert) { |
|
eth_hdr = (struct ethhdr *)skb_mac_header(skb); |
|
vlan_hdr = skb_push(skb, sizeof(*vlan_hdr) - sizeof(*eth_hdr)); |
|
memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN); |
|
vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); |
|
vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto; |
|
vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); |
|
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, |
|
FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) { |
|
printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
|
} |
|
} else { |
|
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, |
|
FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) { |
|
printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
|
} |
|
} |
|
|
|
pa = dma_map_single(&fnic->pdev->dev, skb->data, skb->len, |
|
DMA_TO_DEVICE); |
|
if (dma_mapping_error(&fnic->pdev->dev, pa)) { |
|
printk(KERN_ERR "DMA mapping failed\n"); |
|
goto free_skb; |
|
} |
|
|
|
spin_lock_irqsave(&fnic->wq_lock[0], flags); |
|
if (!vnic_wq_desc_avail(wq)) |
|
goto irq_restore; |
|
|
|
fnic_queue_wq_eth_desc(wq, skb, pa, skb->len, |
|
0 /* hw inserts cos value */, |
|
fnic->vlan_id, 1); |
|
spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
|
return; |
|
|
|
irq_restore: |
|
spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
|
dma_unmap_single(&fnic->pdev->dev, pa, skb->len, DMA_TO_DEVICE); |
|
free_skb: |
|
kfree_skb(skb); |
|
} |
|
|
|
/* |
|
* Send FC frame. |
|
*/ |
|
static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp) |
|
{ |
|
struct vnic_wq *wq = &fnic->wq[0]; |
|
struct sk_buff *skb; |
|
dma_addr_t pa; |
|
struct ethhdr *eth_hdr; |
|
struct vlan_ethhdr *vlan_hdr; |
|
struct fcoe_hdr *fcoe_hdr; |
|
struct fc_frame_header *fh; |
|
u32 tot_len, eth_hdr_len; |
|
int ret = 0; |
|
unsigned long flags; |
|
|
|
fh = fc_frame_header_get(fp); |
|
skb = fp_skb(fp); |
|
|
|
if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
|
fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb)) |
|
return 0; |
|
|
|
if (!fnic->vlan_hw_insert) { |
|
eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr); |
|
vlan_hdr = skb_push(skb, eth_hdr_len); |
|
eth_hdr = (struct ethhdr *)vlan_hdr; |
|
vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); |
|
vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE); |
|
vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); |
|
fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1); |
|
} else { |
|
eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr); |
|
eth_hdr = skb_push(skb, eth_hdr_len); |
|
eth_hdr->h_proto = htons(ETH_P_FCOE); |
|
fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1); |
|
} |
|
|
|
if (fnic->ctlr.map_dest) |
|
fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id); |
|
else |
|
memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN); |
|
memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN); |
|
|
|
tot_len = skb->len; |
|
BUG_ON(tot_len % 4); |
|
|
|
memset(fcoe_hdr, 0, sizeof(*fcoe_hdr)); |
|
fcoe_hdr->fcoe_sof = fr_sof(fp); |
|
if (FC_FCOE_VER) |
|
FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER); |
|
|
|
pa = dma_map_single(&fnic->pdev->dev, eth_hdr, tot_len, DMA_TO_DEVICE); |
|
if (dma_mapping_error(&fnic->pdev->dev, pa)) { |
|
ret = -ENOMEM; |
|
printk(KERN_ERR "DMA map failed with error %d\n", ret); |
|
goto free_skb_on_err; |
|
} |
|
|
|
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND, |
|
(char *)eth_hdr, tot_len)) != 0) { |
|
printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
|
} |
|
|
|
spin_lock_irqsave(&fnic->wq_lock[0], flags); |
|
|
|
if (!vnic_wq_desc_avail(wq)) { |
|
dma_unmap_single(&fnic->pdev->dev, pa, tot_len, DMA_TO_DEVICE); |
|
ret = -1; |
|
goto irq_restore; |
|
} |
|
|
|
fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp), |
|
0 /* hw inserts cos value */, |
|
fnic->vlan_id, 1, 1, 1); |
|
|
|
irq_restore: |
|
spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
|
|
|
free_skb_on_err: |
|
if (ret) |
|
dev_kfree_skb_any(fp_skb(fp)); |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* fnic_send |
|
* Routine to send a raw frame |
|
*/ |
|
int fnic_send(struct fc_lport *lp, struct fc_frame *fp) |
|
{ |
|
struct fnic *fnic = lport_priv(lp); |
|
unsigned long flags; |
|
|
|
if (fnic->in_remove) { |
|
dev_kfree_skb(fp_skb(fp)); |
|
return -1; |
|
} |
|
|
|
/* |
|
* Queue frame if in a transitional state. |
|
* This occurs while registering the Port_ID / MAC address after FLOGI. |
|
*/ |
|
spin_lock_irqsave(&fnic->fnic_lock, flags); |
|
if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) { |
|
skb_queue_tail(&fnic->tx_queue, fp_skb(fp)); |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
return 0; |
|
} |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
|
|
return fnic_send_frame(fnic, fp); |
|
} |
|
|
|
/** |
|
* fnic_flush_tx() - send queued frames. |
|
* @fnic: fnic device |
|
* |
|
* Send frames that were waiting to go out in FC or Ethernet mode. |
|
* Whenever changing modes we purge queued frames, so these frames should |
|
* be queued for the stable mode that we're in, either FC or Ethernet. |
|
* |
|
* Called without fnic_lock held. |
|
*/ |
|
void fnic_flush_tx(struct fnic *fnic) |
|
{ |
|
struct sk_buff *skb; |
|
struct fc_frame *fp; |
|
|
|
while ((skb = skb_dequeue(&fnic->tx_queue))) { |
|
fp = (struct fc_frame *)skb; |
|
fnic_send_frame(fnic, fp); |
|
} |
|
} |
|
|
|
/** |
|
* fnic_set_eth_mode() - put fnic into ethernet mode. |
|
* @fnic: fnic device |
|
* |
|
* Called without fnic lock held. |
|
*/ |
|
static void fnic_set_eth_mode(struct fnic *fnic) |
|
{ |
|
unsigned long flags; |
|
enum fnic_state old_state; |
|
int ret; |
|
|
|
spin_lock_irqsave(&fnic->fnic_lock, flags); |
|
again: |
|
old_state = fnic->state; |
|
switch (old_state) { |
|
case FNIC_IN_FC_MODE: |
|
case FNIC_IN_ETH_TRANS_FC_MODE: |
|
default: |
|
fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
|
|
ret = fnic_fw_reset_handler(fnic); |
|
|
|
spin_lock_irqsave(&fnic->fnic_lock, flags); |
|
if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE) |
|
goto again; |
|
if (ret) |
|
fnic->state = old_state; |
|
break; |
|
|
|
case FNIC_IN_FC_TRANS_ETH_MODE: |
|
case FNIC_IN_ETH_MODE: |
|
break; |
|
} |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
} |
|
|
|
static void fnic_wq_complete_frame_send(struct vnic_wq *wq, |
|
struct cq_desc *cq_desc, |
|
struct vnic_wq_buf *buf, void *opaque) |
|
{ |
|
struct sk_buff *skb = buf->os_buf; |
|
struct fc_frame *fp = (struct fc_frame *)skb; |
|
struct fnic *fnic = vnic_dev_priv(wq->vdev); |
|
|
|
dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len, |
|
DMA_TO_DEVICE); |
|
dev_kfree_skb_irq(fp_skb(fp)); |
|
buf->os_buf = NULL; |
|
} |
|
|
|
static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev, |
|
struct cq_desc *cq_desc, u8 type, |
|
u16 q_number, u16 completed_index, |
|
void *opaque) |
|
{ |
|
struct fnic *fnic = vnic_dev_priv(vdev); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&fnic->wq_lock[q_number], flags); |
|
vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index, |
|
fnic_wq_complete_frame_send, NULL); |
|
spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags); |
|
|
|
return 0; |
|
} |
|
|
|
int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do) |
|
{ |
|
unsigned int wq_work_done = 0; |
|
unsigned int i; |
|
|
|
for (i = 0; i < fnic->raw_wq_count; i++) { |
|
wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i], |
|
work_to_do, |
|
fnic_wq_cmpl_handler_cont, |
|
NULL); |
|
} |
|
|
|
return wq_work_done; |
|
} |
|
|
|
|
|
void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) |
|
{ |
|
struct fc_frame *fp = buf->os_buf; |
|
struct fnic *fnic = vnic_dev_priv(wq->vdev); |
|
|
|
dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len, |
|
DMA_TO_DEVICE); |
|
|
|
dev_kfree_skb(fp_skb(fp)); |
|
buf->os_buf = NULL; |
|
} |
|
|
|
void fnic_fcoe_reset_vlans(struct fnic *fnic) |
|
{ |
|
unsigned long flags; |
|
struct fcoe_vlan *vlan; |
|
struct fcoe_vlan *next; |
|
|
|
/* |
|
* indicate a link down to fcoe so that all fcf's are free'd |
|
* might not be required since we did this before sending vlan |
|
* discovery request |
|
*/ |
|
spin_lock_irqsave(&fnic->vlans_lock, flags); |
|
if (!list_empty(&fnic->vlans)) { |
|
list_for_each_entry_safe(vlan, next, &fnic->vlans, list) { |
|
list_del(&vlan->list); |
|
kfree(vlan); |
|
} |
|
} |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
} |
|
|
|
void fnic_handle_fip_timer(struct fnic *fnic) |
|
{ |
|
unsigned long flags; |
|
struct fcoe_vlan *vlan; |
|
struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
|
u64 sol_time; |
|
|
|
spin_lock_irqsave(&fnic->fnic_lock, flags); |
|
if (fnic->stop_rx_link_events) { |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
return; |
|
} |
|
spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
|
|
|
if (fnic->ctlr.mode == FIP_MODE_NON_FIP) |
|
return; |
|
|
|
spin_lock_irqsave(&fnic->vlans_lock, flags); |
|
if (list_empty(&fnic->vlans)) { |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
/* no vlans available, try again */ |
|
if (unlikely(fnic_log_level & FNIC_FCS_LOGGING)) |
|
if (printk_ratelimit()) |
|
shost_printk(KERN_DEBUG, fnic->lport->host, |
|
"Start VLAN Discovery\n"); |
|
fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
|
return; |
|
} |
|
|
|
vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
|
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
|
"fip_timer: vlan %d state %d sol_count %d\n", |
|
vlan->vid, vlan->state, vlan->sol_count); |
|
switch (vlan->state) { |
|
case FIP_VLAN_USED: |
|
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
|
"FIP VLAN is selected for FC transaction\n"); |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
break; |
|
case FIP_VLAN_FAILED: |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
/* if all vlans are in failed state, restart vlan disc */ |
|
if (unlikely(fnic_log_level & FNIC_FCS_LOGGING)) |
|
if (printk_ratelimit()) |
|
shost_printk(KERN_DEBUG, fnic->lport->host, |
|
"Start VLAN Discovery\n"); |
|
fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
|
break; |
|
case FIP_VLAN_SENT: |
|
if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) { |
|
/* |
|
* no response on this vlan, remove from the list. |
|
* Try the next vlan |
|
*/ |
|
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
|
"Dequeue this VLAN ID %d from list\n", |
|
vlan->vid); |
|
list_del(&vlan->list); |
|
kfree(vlan); |
|
vlan = NULL; |
|
if (list_empty(&fnic->vlans)) { |
|
/* we exhausted all vlans, restart vlan disc */ |
|
spin_unlock_irqrestore(&fnic->vlans_lock, |
|
flags); |
|
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
|
"fip_timer: vlan list empty, " |
|
"trigger vlan disc\n"); |
|
fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
|
return; |
|
} |
|
/* check the next vlan */ |
|
vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, |
|
list); |
|
fnic->set_vlan(fnic, vlan->vid); |
|
vlan->state = FIP_VLAN_SENT; /* sent now */ |
|
} |
|
spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
|
atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count); |
|
vlan->sol_count++; |
|
sol_time = jiffies + msecs_to_jiffies |
|
(FCOE_CTLR_START_DELAY); |
|
mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); |
|
break; |
|
} |
|
}
|
|
|