| /* |
| * Copyright 2008 Cisco Systems, Inc. All rights reserved. |
| * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
| * |
| * This program is free software; you may redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #include <linux/errno.h> |
| #include <linux/pci.h> |
| #include <linux/slab.h> |
| #include <linux/skbuff.h> |
| #include <linux/interrupt.h> |
| #include <linux/spinlock.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_vlan.h> |
| #include <linux/workqueue.h> |
| #include <scsi/fc/fc_fip.h> |
| #include <scsi/fc/fc_els.h> |
| #include <scsi/fc/fc_fcoe.h> |
| #include <scsi/fc_frame.h> |
| #include <scsi/libfc.h> |
| #include "fnic_io.h" |
| #include "fnic.h" |
| #include "fnic_fip.h" |
| #include "cq_enet_desc.h" |
| #include "cq_exch_desc.h" |
| |
| static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
| struct workqueue_struct *fnic_fip_queue; |
| struct workqueue_struct *fnic_event_queue; |
| |
| static void fnic_set_eth_mode(struct fnic *); |
| static void fnic_fcoe_send_vlan_req(struct fnic *fnic); |
| static void fnic_fcoe_start_fcf_disc(struct fnic *fnic); |
| static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *); |
| static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag); |
| static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb); |
| |
| void fnic_handle_link(struct work_struct *work) |
| { |
| struct fnic *fnic = container_of(work, struct fnic, link_work); |
| unsigned long flags; |
| int old_link_status; |
| u32 old_link_down_cnt; |
| |
| spin_lock_irqsave(&fnic->fnic_lock, flags); |
| |
| if (fnic->stop_rx_link_events) { |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| return; |
| } |
| |
| old_link_down_cnt = fnic->link_down_cnt; |
| old_link_status = fnic->link_status; |
| fnic->link_status = vnic_dev_link_status(fnic->vdev); |
| fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev); |
| |
| switch (vnic_dev_port_speed(fnic->vdev)) { |
| case DCEM_PORTSPEED_10G: |
| fc_host_speed(fnic->lport->host) = FC_PORTSPEED_10GBIT; |
| fnic->lport->link_supported_speeds = FC_PORTSPEED_10GBIT; |
| break; |
| case DCEM_PORTSPEED_25G: |
| fc_host_speed(fnic->lport->host) = FC_PORTSPEED_25GBIT; |
| fnic->lport->link_supported_speeds = FC_PORTSPEED_25GBIT; |
| break; |
| case DCEM_PORTSPEED_40G: |
| case DCEM_PORTSPEED_4x10G: |
| fc_host_speed(fnic->lport->host) = FC_PORTSPEED_40GBIT; |
| fnic->lport->link_supported_speeds = FC_PORTSPEED_40GBIT; |
| break; |
| case DCEM_PORTSPEED_100G: |
| fc_host_speed(fnic->lport->host) = FC_PORTSPEED_100GBIT; |
| fnic->lport->link_supported_speeds = FC_PORTSPEED_100GBIT; |
| break; |
| default: |
| fc_host_speed(fnic->lport->host) = FC_PORTSPEED_UNKNOWN; |
| fnic->lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN; |
| break; |
| } |
| |
| if (old_link_status == fnic->link_status) { |
| if (!fnic->link_status) { |
| /* DOWN -> DOWN */ |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| fnic_fc_trace_set_data(fnic->lport->host->host_no, |
| FNIC_FC_LE, "Link Status: DOWN->DOWN", |
| strlen("Link Status: DOWN->DOWN")); |
| } else { |
| if (old_link_down_cnt != fnic->link_down_cnt) { |
| /* UP -> DOWN -> UP */ |
| fnic->lport->host_stats.link_failure_count++; |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| fnic_fc_trace_set_data( |
| fnic->lport->host->host_no, |
| FNIC_FC_LE, |
| "Link Status:UP_DOWN_UP", |
| strlen("Link_Status:UP_DOWN_UP") |
| ); |
| FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| "link down\n"); |
| fcoe_ctlr_link_down(&fnic->ctlr); |
| if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
| /* start FCoE VLAN discovery */ |
| fnic_fc_trace_set_data( |
| fnic->lport->host->host_no, |
| FNIC_FC_LE, |
| "Link Status: UP_DOWN_UP_VLAN", |
| strlen( |
| "Link Status: UP_DOWN_UP_VLAN") |
| ); |
| fnic_fcoe_send_vlan_req(fnic); |
| return; |
| } |
| FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| "link up\n"); |
| fcoe_ctlr_link_up(&fnic->ctlr); |
| } else { |
| /* UP -> UP */ |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| fnic_fc_trace_set_data( |
| fnic->lport->host->host_no, FNIC_FC_LE, |
| "Link Status: UP_UP", |
| strlen("Link Status: UP_UP")); |
| } |
| } |
| } else if (fnic->link_status) { |
| /* DOWN -> UP */ |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
| /* start FCoE VLAN discovery */ |
| fnic_fc_trace_set_data( |
| fnic->lport->host->host_no, |
| FNIC_FC_LE, "Link Status: DOWN_UP_VLAN", |
| strlen("Link Status: DOWN_UP_VLAN")); |
| fnic_fcoe_send_vlan_req(fnic); |
| return; |
| } |
| FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n"); |
| fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE, |
| "Link Status: DOWN_UP", strlen("Link Status: DOWN_UP")); |
| fcoe_ctlr_link_up(&fnic->ctlr); |
| } else { |
| /* UP -> DOWN */ |
| fnic->lport->host_stats.link_failure_count++; |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n"); |
| fnic_fc_trace_set_data( |
| fnic->lport->host->host_no, FNIC_FC_LE, |
| "Link Status: UP_DOWN", |
| strlen("Link Status: UP_DOWN")); |
| if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
| FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| "deleting fip-timer during link-down\n"); |
| del_timer_sync(&fnic->fip_timer); |
| } |
| fcoe_ctlr_link_down(&fnic->ctlr); |
| } |
| |
| } |
| |
| /* |
| * This function passes incoming fabric frames to libFC |
| */ |
| void fnic_handle_frame(struct work_struct *work) |
| { |
| struct fnic *fnic = container_of(work, struct fnic, frame_work); |
| struct fc_lport *lp = fnic->lport; |
| unsigned long flags; |
| struct sk_buff *skb; |
| struct fc_frame *fp; |
| |
| while ((skb = skb_dequeue(&fnic->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; |
| } |
| fp = (struct fc_frame *)skb; |
| |
| /* |
| * 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->frame_queue, skb); |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| return; |
| } |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| |
| fc_exch_recv(lp, fp); |
| } |
| } |
| |
| void fnic_fcoe_evlist_free(struct fnic *fnic) |
| { |
| struct fnic_event *fevt = NULL; |
| struct fnic_event *next = NULL; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&fnic->fnic_lock, flags); |
| if (list_empty(&fnic->evlist)) { |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| return; |
| } |
| |
| list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
| list_del(&fevt->list); |
| kfree(fevt); |
| } |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| } |
| |
| void fnic_handle_event(struct work_struct *work) |
| { |
| struct fnic *fnic = container_of(work, struct fnic, event_work); |
| struct fnic_event *fevt = NULL; |
| struct fnic_event *next = NULL; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&fnic->fnic_lock, flags); |
| if (list_empty(&fnic->evlist)) { |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| return; |
| } |
| |
| list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
| if (fnic->stop_rx_link_events) { |
| list_del(&fevt->list); |
| kfree(fevt); |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 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) { |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| return; |
| } |
| |
| list_del(&fevt->list); |
| switch (fevt->event) { |
| case FNIC_EVT_START_VLAN_DISC: |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| fnic_fcoe_send_vlan_req(fnic); |
| spin_lock_irqsave(&fnic->fnic_lock, flags); |
| break; |
| case FNIC_EVT_START_FCF_DISC: |
| FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| "Start FCF Discovery\n"); |
| fnic_fcoe_start_fcf_disc(fnic); |
| break; |
| default: |
| FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| "Unknown event 0x%x\n", fevt->event); |
| break; |
| } |
| kfree(fevt); |
| } |
| spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| } |
| |
| /** |
| * Check if the Received FIP FLOGI frame is rejected |
| * @fip: The FCoE controller that received the frame |
| * @skb: The received FIP frame |
| * |
| * Returns non-zero if the frame is rejected with unsupported cmd with |
| * insufficient resource els explanation. |
| */ |
| static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip, |
| struct sk_buff *skb) |
| { |
| struct fc_lport *lport = fip->lp; |
| struct fip_header *fiph; |
| struct fc_frame_header *fh = NULL; |
| struct fip_desc *desc; |
| struct fip_encaps *els; |
| enum fip_desc_type els_dtype = 0; |
| u16 op; |
| u8 els_op; |
| u8 sub; |
| |
| size_t els_len = 0; |
| size_t rlen; |
| size_t dlen = 0; |
| |
| if (skb_linearize(skb)) |
| return 0; |
| |
| if (skb->len < sizeof(*fiph)) |
| return 0; |
| |
| fiph = (struct fip_header *)skb->data; |
| op = ntohs(fiph->fip_op); |
| sub = fiph->fip_subcode; |
| |
| if (op != FIP_OP_LS) |
| return 0; |
| |
| if (sub != FIP_SC_REP) |
| return 0; |
| |
| rlen = ntohs(fiph->fip_dl_len) * 4; |
| if (rlen + sizeof(*fiph) > skb->len) |
| return 0; |
| |
| desc = (struct fip_desc *)(fiph + 1); |
| dlen = desc->fip_dlen * FIP_BPW; |
| |
| if (desc->fip_dtype == FIP_DT_FLOGI) { |
| |
| if (dlen < sizeof(*els) + sizeof(*fh) + 1) |
| return 0; |
| |
| els_len = dlen - sizeof(*els); |
| els = (struct fip_encaps *)desc; |
| fh = (struct fc_frame_header *)(els + 1); |
| els_dtype = desc->fip_dtype; |
| |
| 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, |
| "Flogi Request Rejected by Switch\n"); |
| 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; |
| int fr_len; |
| 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; |
| |
| fr_len = sizeof(*vlan); |
| 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; |
| unsigned int eth_hdrs_stripped; |
| 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); |
| eth_hdrs_stripped = 1; |
| 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); |
| eth_hdrs_stripped = 0; |
| 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 (printk_ratelimit()) |
| FNIC_FCS_DBG(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); |
| shost_printk(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 (printk_ratelimit()) |
| FNIC_FCS_DBG(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 |
| */ |
| shost_printk(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); |
| shost_printk(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; |
| } |
| } |