Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008 Cisco Systems, Inc. All rights reserved. |
| 3 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
| 4 | * |
| 5 | * This program is free software; you may redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; version 2 of the License. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 10 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 11 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 12 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 13 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 14 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 15 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 16 | * SOFTWARE. |
| 17 | */ |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/pci.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 20 | #include <linux/slab.h> |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 21 | #include <linux/skbuff.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | #include <linux/spinlock.h> |
| 24 | #include <linux/if_ether.h> |
| 25 | #include <linux/if_vlan.h> |
| 26 | #include <linux/workqueue.h> |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 27 | #include <scsi/fc/fc_fip.h> |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 28 | #include <scsi/fc/fc_els.h> |
| 29 | #include <scsi/fc/fc_fcoe.h> |
| 30 | #include <scsi/fc_frame.h> |
| 31 | #include <scsi/libfc.h> |
| 32 | #include "fnic_io.h" |
| 33 | #include "fnic.h" |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 34 | #include "fnic_fip.h" |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 35 | #include "cq_enet_desc.h" |
| 36 | #include "cq_exch_desc.h" |
| 37 | |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 38 | static u8 fcoe_all_fcfs[ETH_ALEN]; |
| 39 | struct workqueue_struct *fnic_fip_queue; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 40 | struct workqueue_struct *fnic_event_queue; |
| 41 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 42 | static void fnic_set_eth_mode(struct fnic *); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 43 | static void fnic_fcoe_send_vlan_req(struct fnic *fnic); |
| 44 | static void fnic_fcoe_start_fcf_disc(struct fnic *fnic); |
| 45 | static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *); |
| 46 | static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag); |
| 47 | static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 48 | |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 49 | void fnic_handle_link(struct work_struct *work) |
| 50 | { |
| 51 | struct fnic *fnic = container_of(work, struct fnic, link_work); |
| 52 | unsigned long flags; |
| 53 | int old_link_status; |
| 54 | u32 old_link_down_cnt; |
| 55 | |
| 56 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 57 | |
| 58 | if (fnic->stop_rx_link_events) { |
| 59 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 60 | return; |
| 61 | } |
| 62 | |
| 63 | old_link_down_cnt = fnic->link_down_cnt; |
| 64 | old_link_status = fnic->link_status; |
| 65 | fnic->link_status = vnic_dev_link_status(fnic->vdev); |
| 66 | fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev); |
| 67 | |
| 68 | if (old_link_status == fnic->link_status) { |
| 69 | if (!fnic->link_status) |
| 70 | /* DOWN -> DOWN */ |
| 71 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 72 | else { |
| 73 | if (old_link_down_cnt != fnic->link_down_cnt) { |
| 74 | /* UP -> DOWN -> UP */ |
| 75 | fnic->lport->host_stats.link_failure_count++; |
| 76 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 77 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 78 | "link down\n"); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 79 | fcoe_ctlr_link_down(&fnic->ctlr); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 80 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
| 81 | /* start FCoE VLAN discovery */ |
| 82 | fnic_fcoe_send_vlan_req(fnic); |
| 83 | return; |
| 84 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 85 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 86 | "link up\n"); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 87 | fcoe_ctlr_link_up(&fnic->ctlr); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 88 | } else |
| 89 | /* UP -> UP */ |
| 90 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 91 | } |
| 92 | } else if (fnic->link_status) { |
| 93 | /* DOWN -> UP */ |
| 94 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 95 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
| 96 | /* start FCoE VLAN discovery */ |
| 97 | fnic_fcoe_send_vlan_req(fnic); |
| 98 | return; |
| 99 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 100 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n"); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 101 | fcoe_ctlr_link_up(&fnic->ctlr); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 102 | } else { |
| 103 | /* UP -> DOWN */ |
| 104 | fnic->lport->host_stats.link_failure_count++; |
| 105 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 106 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n"); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 107 | fcoe_ctlr_link_down(&fnic->ctlr); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | } |
| 111 | |
| 112 | /* |
| 113 | * This function passes incoming fabric frames to libFC |
| 114 | */ |
| 115 | void fnic_handle_frame(struct work_struct *work) |
| 116 | { |
| 117 | struct fnic *fnic = container_of(work, struct fnic, frame_work); |
| 118 | struct fc_lport *lp = fnic->lport; |
| 119 | unsigned long flags; |
| 120 | struct sk_buff *skb; |
| 121 | struct fc_frame *fp; |
| 122 | |
| 123 | while ((skb = skb_dequeue(&fnic->frame_queue))) { |
| 124 | |
| 125 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 126 | if (fnic->stop_rx_link_events) { |
| 127 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 128 | dev_kfree_skb(skb); |
| 129 | return; |
| 130 | } |
| 131 | fp = (struct fc_frame *)skb; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 132 | |
| 133 | /* |
| 134 | * If we're in a transitional state, just re-queue and return. |
| 135 | * The queue will be serviced when we get to a stable state. |
| 136 | */ |
| 137 | if (fnic->state != FNIC_IN_FC_MODE && |
| 138 | fnic->state != FNIC_IN_ETH_MODE) { |
| 139 | skb_queue_head(&fnic->frame_queue, skb); |
| 140 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 141 | return; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 142 | } |
| 143 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 144 | |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 145 | fc_exch_recv(lp, fp); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 146 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 147 | } |
| 148 | |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 149 | void fnic_fcoe_evlist_free(struct fnic *fnic) |
| 150 | { |
| 151 | struct fnic_event *fevt = NULL; |
| 152 | struct fnic_event *next = NULL; |
| 153 | unsigned long flags; |
| 154 | |
| 155 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 156 | if (list_empty(&fnic->evlist)) { |
| 157 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 158 | return; |
| 159 | } |
| 160 | |
| 161 | list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
| 162 | list_del(&fevt->list); |
| 163 | kfree(fevt); |
| 164 | } |
| 165 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 166 | } |
| 167 | |
| 168 | void fnic_handle_event(struct work_struct *work) |
| 169 | { |
| 170 | struct fnic *fnic = container_of(work, struct fnic, event_work); |
| 171 | struct fnic_event *fevt = NULL; |
| 172 | struct fnic_event *next = NULL; |
| 173 | unsigned long flags; |
| 174 | |
| 175 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 176 | if (list_empty(&fnic->evlist)) { |
| 177 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 178 | return; |
| 179 | } |
| 180 | |
| 181 | list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
| 182 | if (fnic->stop_rx_link_events) { |
| 183 | list_del(&fevt->list); |
| 184 | kfree(fevt); |
| 185 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 186 | return; |
| 187 | } |
| 188 | /* |
| 189 | * If we're in a transitional state, just re-queue and return. |
| 190 | * The queue will be serviced when we get to a stable state. |
| 191 | */ |
| 192 | if (fnic->state != FNIC_IN_FC_MODE && |
| 193 | fnic->state != FNIC_IN_ETH_MODE) { |
| 194 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 195 | return; |
| 196 | } |
| 197 | |
| 198 | list_del(&fevt->list); |
| 199 | switch (fevt->event) { |
| 200 | case FNIC_EVT_START_VLAN_DISC: |
| 201 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 202 | fnic_fcoe_send_vlan_req(fnic); |
| 203 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 204 | break; |
| 205 | case FNIC_EVT_START_FCF_DISC: |
| 206 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 207 | "Start FCF Discovery\n"); |
| 208 | fnic_fcoe_start_fcf_disc(fnic); |
| 209 | break; |
| 210 | default: |
| 211 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 212 | "Unknown event 0x%x\n", fevt->event); |
| 213 | break; |
| 214 | } |
| 215 | kfree(fevt); |
| 216 | } |
| 217 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Check if the Received FIP FLOGI frame is rejected |
| 222 | * @fip: The FCoE controller that received the frame |
| 223 | * @skb: The received FIP frame |
| 224 | * |
| 225 | * Returns non-zero if the frame is rejected with unsupported cmd with |
| 226 | * insufficient resource els explanation. |
| 227 | */ |
| 228 | static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip, |
| 229 | struct sk_buff *skb) |
| 230 | { |
| 231 | struct fc_lport *lport = fip->lp; |
| 232 | struct fip_header *fiph; |
| 233 | struct fc_frame_header *fh = NULL; |
| 234 | struct fip_desc *desc; |
| 235 | struct fip_encaps *els; |
| 236 | enum fip_desc_type els_dtype = 0; |
| 237 | u16 op; |
| 238 | u8 els_op; |
| 239 | u8 sub; |
| 240 | |
| 241 | size_t els_len = 0; |
| 242 | size_t rlen; |
| 243 | size_t dlen = 0; |
| 244 | |
| 245 | if (skb_linearize(skb)) |
| 246 | return 0; |
| 247 | |
| 248 | if (skb->len < sizeof(*fiph)) |
| 249 | return 0; |
| 250 | |
| 251 | fiph = (struct fip_header *)skb->data; |
| 252 | op = ntohs(fiph->fip_op); |
| 253 | sub = fiph->fip_subcode; |
| 254 | |
| 255 | if (op != FIP_OP_LS) |
| 256 | return 0; |
| 257 | |
| 258 | if (sub != FIP_SC_REP) |
| 259 | return 0; |
| 260 | |
| 261 | rlen = ntohs(fiph->fip_dl_len) * 4; |
| 262 | if (rlen + sizeof(*fiph) > skb->len) |
| 263 | return 0; |
| 264 | |
| 265 | desc = (struct fip_desc *)(fiph + 1); |
| 266 | dlen = desc->fip_dlen * FIP_BPW; |
| 267 | |
| 268 | if (desc->fip_dtype == FIP_DT_FLOGI) { |
| 269 | |
| 270 | shost_printk(KERN_DEBUG, lport->host, |
| 271 | " FIP TYPE FLOGI: fab name:%llx " |
| 272 | "vfid:%d map:%x\n", |
| 273 | fip->sel_fcf->fabric_name, fip->sel_fcf->vfid, |
| 274 | fip->sel_fcf->fc_map); |
| 275 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) |
| 276 | return 0; |
| 277 | |
| 278 | els_len = dlen - sizeof(*els); |
| 279 | els = (struct fip_encaps *)desc; |
| 280 | fh = (struct fc_frame_header *)(els + 1); |
| 281 | els_dtype = desc->fip_dtype; |
| 282 | |
| 283 | if (!fh) |
| 284 | return 0; |
| 285 | |
| 286 | /* |
| 287 | * ELS command code, reason and explanation should be = Reject, |
| 288 | * unsupported command and insufficient resource |
| 289 | */ |
| 290 | els_op = *(u8 *)(fh + 1); |
| 291 | if (els_op == ELS_LS_RJT) { |
| 292 | shost_printk(KERN_INFO, lport->host, |
| 293 | "Flogi Request Rejected by Switch\n"); |
| 294 | return 1; |
| 295 | } |
| 296 | shost_printk(KERN_INFO, lport->host, |
| 297 | "Flogi Request Accepted by Switch\n"); |
| 298 | } |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | static void fnic_fcoe_send_vlan_req(struct fnic *fnic) |
| 303 | { |
| 304 | struct fcoe_ctlr *fip = &fnic->ctlr; |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 305 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 306 | struct sk_buff *skb; |
| 307 | char *eth_fr; |
| 308 | int fr_len; |
| 309 | struct fip_vlan *vlan; |
| 310 | u64 vlan_tov; |
| 311 | |
| 312 | fnic_fcoe_reset_vlans(fnic); |
| 313 | fnic->set_vlan(fnic, 0); |
| 314 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
| 315 | "Sending VLAN request...\n"); |
| 316 | skb = dev_alloc_skb(sizeof(struct fip_vlan)); |
| 317 | if (!skb) |
| 318 | return; |
| 319 | |
| 320 | fr_len = sizeof(*vlan); |
| 321 | eth_fr = (char *)skb->data; |
| 322 | vlan = (struct fip_vlan *)eth_fr; |
| 323 | |
| 324 | memset(vlan, 0, sizeof(*vlan)); |
| 325 | memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
| 326 | memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN); |
| 327 | vlan->eth.h_proto = htons(ETH_P_FIP); |
| 328 | |
| 329 | vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); |
| 330 | vlan->fip.fip_op = htons(FIP_OP_VLAN); |
| 331 | vlan->fip.fip_subcode = FIP_SC_VL_REQ; |
| 332 | vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW); |
| 333 | |
| 334 | vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; |
| 335 | vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW; |
| 336 | memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); |
| 337 | |
| 338 | vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; |
| 339 | vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW; |
| 340 | put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn); |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 341 | atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 342 | |
| 343 | skb_put(skb, sizeof(*vlan)); |
| 344 | skb->protocol = htons(ETH_P_FIP); |
| 345 | skb_reset_mac_header(skb); |
| 346 | skb_reset_network_header(skb); |
| 347 | fip->send(fip, skb); |
| 348 | |
| 349 | /* set a timer so that we can retry if there no response */ |
| 350 | vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV); |
| 351 | mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov)); |
| 352 | } |
| 353 | |
| 354 | static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb) |
| 355 | { |
| 356 | struct fcoe_ctlr *fip = &fnic->ctlr; |
| 357 | struct fip_header *fiph; |
| 358 | struct fip_desc *desc; |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 359 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 360 | u16 vid; |
| 361 | size_t rlen; |
| 362 | size_t dlen; |
| 363 | struct fcoe_vlan *vlan; |
| 364 | u64 sol_time; |
| 365 | unsigned long flags; |
| 366 | |
| 367 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
| 368 | "Received VLAN response...\n"); |
| 369 | |
| 370 | fiph = (struct fip_header *) skb->data; |
| 371 | |
| 372 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
| 373 | "Received VLAN response... OP 0x%x SUB_OP 0x%x\n", |
| 374 | ntohs(fiph->fip_op), fiph->fip_subcode); |
| 375 | |
| 376 | rlen = ntohs(fiph->fip_dl_len) * 4; |
| 377 | fnic_fcoe_reset_vlans(fnic); |
| 378 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 379 | desc = (struct fip_desc *)(fiph + 1); |
| 380 | while (rlen > 0) { |
| 381 | dlen = desc->fip_dlen * FIP_BPW; |
| 382 | switch (desc->fip_dtype) { |
| 383 | case FIP_DT_VLAN: |
| 384 | vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan); |
| 385 | shost_printk(KERN_INFO, fnic->lport->host, |
| 386 | "process_vlan_resp: FIP VLAN %d\n", vid); |
| 387 | vlan = kmalloc(sizeof(*vlan), |
| 388 | GFP_ATOMIC); |
| 389 | if (!vlan) { |
| 390 | /* retry from timer */ |
| 391 | spin_unlock_irqrestore(&fnic->vlans_lock, |
| 392 | flags); |
| 393 | goto out; |
| 394 | } |
| 395 | memset(vlan, 0, sizeof(struct fcoe_vlan)); |
| 396 | vlan->vid = vid & 0x0fff; |
| 397 | vlan->state = FIP_VLAN_AVAIL; |
| 398 | list_add_tail(&vlan->list, &fnic->vlans); |
| 399 | break; |
| 400 | } |
| 401 | desc = (struct fip_desc *)((char *)desc + dlen); |
| 402 | rlen -= dlen; |
| 403 | } |
| 404 | |
| 405 | /* any VLAN descriptors present ? */ |
| 406 | if (list_empty(&fnic->vlans)) { |
| 407 | /* retry from timer */ |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 408 | atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 409 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
| 410 | "No VLAN descriptors in FIP VLAN response\n"); |
| 411 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 412 | goto out; |
| 413 | } |
| 414 | |
| 415 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
| 416 | fnic->set_vlan(fnic, vlan->vid); |
| 417 | vlan->state = FIP_VLAN_SENT; /* sent now */ |
| 418 | vlan->sol_count++; |
| 419 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 420 | |
| 421 | /* start the solicitation */ |
| 422 | fcoe_ctlr_link_up(fip); |
| 423 | |
| 424 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
| 425 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); |
| 426 | out: |
| 427 | return; |
| 428 | } |
| 429 | |
| 430 | static void fnic_fcoe_start_fcf_disc(struct fnic *fnic) |
| 431 | { |
| 432 | unsigned long flags; |
| 433 | struct fcoe_vlan *vlan; |
| 434 | u64 sol_time; |
| 435 | |
| 436 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 437 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
| 438 | fnic->set_vlan(fnic, vlan->vid); |
| 439 | vlan->state = FIP_VLAN_SENT; /* sent now */ |
| 440 | vlan->sol_count = 1; |
| 441 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 442 | |
| 443 | /* start the solicitation */ |
| 444 | fcoe_ctlr_link_up(&fnic->ctlr); |
| 445 | |
| 446 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
| 447 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); |
| 448 | } |
| 449 | |
| 450 | static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag) |
| 451 | { |
| 452 | unsigned long flags; |
| 453 | struct fcoe_vlan *fvlan; |
| 454 | |
| 455 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 456 | if (list_empty(&fnic->vlans)) { |
| 457 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 458 | return -EINVAL; |
| 459 | } |
| 460 | |
| 461 | fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
| 462 | if (fvlan->state == FIP_VLAN_USED) { |
| 463 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | if (fvlan->state == FIP_VLAN_SENT) { |
| 468 | fvlan->state = FIP_VLAN_USED; |
| 469 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 470 | return 0; |
| 471 | } |
| 472 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 473 | return -EINVAL; |
| 474 | } |
| 475 | |
| 476 | static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev) |
| 477 | { |
| 478 | struct fnic_event *fevt; |
| 479 | unsigned long flags; |
| 480 | |
| 481 | fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC); |
| 482 | if (!fevt) |
| 483 | return; |
| 484 | |
| 485 | fevt->fnic = fnic; |
| 486 | fevt->event = ev; |
| 487 | |
| 488 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 489 | list_add_tail(&fevt->list, &fnic->evlist); |
| 490 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 491 | |
| 492 | schedule_work(&fnic->event_work); |
| 493 | } |
| 494 | |
| 495 | static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb) |
| 496 | { |
| 497 | struct fip_header *fiph; |
| 498 | int ret = 1; |
| 499 | u16 op; |
| 500 | u8 sub; |
| 501 | |
| 502 | if (!skb || !(skb->data)) |
| 503 | return -1; |
| 504 | |
| 505 | if (skb_linearize(skb)) |
| 506 | goto drop; |
| 507 | |
| 508 | fiph = (struct fip_header *)skb->data; |
| 509 | op = ntohs(fiph->fip_op); |
| 510 | sub = fiph->fip_subcode; |
| 511 | |
| 512 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
| 513 | goto drop; |
| 514 | |
| 515 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) |
| 516 | goto drop; |
| 517 | |
| 518 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) { |
| 519 | if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags))) |
| 520 | goto drop; |
| 521 | /* pass it on to fcoe */ |
| 522 | ret = 1; |
| 523 | } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_REP) { |
| 524 | /* set the vlan as used */ |
| 525 | fnic_fcoe_process_vlan_resp(fnic, skb); |
| 526 | ret = 0; |
| 527 | } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) { |
| 528 | /* received CVL request, restart vlan disc */ |
| 529 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
| 530 | /* pass it on to fcoe */ |
| 531 | ret = 1; |
| 532 | } |
| 533 | drop: |
| 534 | return ret; |
| 535 | } |
| 536 | |
| 537 | void fnic_handle_fip_frame(struct work_struct *work) |
| 538 | { |
| 539 | struct fnic *fnic = container_of(work, struct fnic, fip_frame_work); |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 540 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 541 | unsigned long flags; |
| 542 | struct sk_buff *skb; |
| 543 | struct ethhdr *eh; |
| 544 | |
| 545 | while ((skb = skb_dequeue(&fnic->fip_frame_queue))) { |
| 546 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 547 | if (fnic->stop_rx_link_events) { |
| 548 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 549 | dev_kfree_skb(skb); |
| 550 | return; |
| 551 | } |
| 552 | /* |
| 553 | * If we're in a transitional state, just re-queue and return. |
| 554 | * The queue will be serviced when we get to a stable state. |
| 555 | */ |
| 556 | if (fnic->state != FNIC_IN_FC_MODE && |
| 557 | fnic->state != FNIC_IN_ETH_MODE) { |
| 558 | skb_queue_head(&fnic->fip_frame_queue, skb); |
| 559 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 560 | return; |
| 561 | } |
| 562 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 563 | eh = (struct ethhdr *)skb->data; |
| 564 | if (eh->h_proto == htons(ETH_P_FIP)) { |
| 565 | skb_pull(skb, sizeof(*eh)); |
| 566 | if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) { |
| 567 | dev_kfree_skb(skb); |
| 568 | continue; |
| 569 | } |
| 570 | /* |
| 571 | * If there's FLOGI rejects - clear all |
| 572 | * fcf's & restart from scratch |
| 573 | */ |
| 574 | if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) { |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 575 | atomic64_inc( |
| 576 | &fnic_stats->vlan_stats.flogi_rejects); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 577 | shost_printk(KERN_INFO, fnic->lport->host, |
| 578 | "Trigger a Link down - VLAN Disc\n"); |
| 579 | fcoe_ctlr_link_down(&fnic->ctlr); |
| 580 | /* start FCoE VLAN discovery */ |
| 581 | fnic_fcoe_send_vlan_req(fnic); |
| 582 | dev_kfree_skb(skb); |
| 583 | continue; |
| 584 | } |
| 585 | fcoe_ctlr_recv(&fnic->ctlr, skb); |
| 586 | continue; |
| 587 | } |
| 588 | } |
| 589 | } |
| 590 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 591 | /** |
| 592 | * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame. |
| 593 | * @fnic: fnic instance. |
| 594 | * @skb: Ethernet Frame. |
| 595 | */ |
| 596 | static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 597 | { |
| 598 | struct fc_frame *fp; |
| 599 | struct ethhdr *eh; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 600 | struct fcoe_hdr *fcoe_hdr; |
| 601 | struct fcoe_crc_eof *ft; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 602 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 603 | /* |
| 604 | * Undo VLAN encapsulation if present. |
| 605 | */ |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 606 | eh = (struct ethhdr *)skb->data; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 607 | if (eh->h_proto == htons(ETH_P_8021Q)) { |
| 608 | memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2); |
| 609 | eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN); |
| 610 | skb_reset_mac_header(skb); |
| 611 | } |
| 612 | if (eh->h_proto == htons(ETH_P_FIP)) { |
Hiral Patel | d7fadce | 2013-02-25 16:18:37 -0800 | [diff] [blame] | 613 | if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) { |
| 614 | printk(KERN_ERR "Dropped FIP frame, as firmware " |
| 615 | "uses non-FIP mode, Enable FIP " |
| 616 | "using UCSM\n"); |
| 617 | goto drop; |
| 618 | } |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 619 | skb_queue_tail(&fnic->fip_frame_queue, skb); |
| 620 | queue_work(fnic_fip_queue, &fnic->fip_frame_work); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 621 | return 1; /* let caller know packet was used */ |
| 622 | } |
| 623 | if (eh->h_proto != htons(ETH_P_FCOE)) |
| 624 | goto drop; |
| 625 | skb_set_network_header(skb, sizeof(*eh)); |
| 626 | skb_pull(skb, sizeof(*eh)); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 627 | |
| 628 | fcoe_hdr = (struct fcoe_hdr *)skb->data; |
| 629 | if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER) |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 630 | goto drop; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 631 | |
| 632 | fp = (struct fc_frame *)skb; |
| 633 | fc_frame_init(fp); |
| 634 | fr_sof(fp) = fcoe_hdr->fcoe_sof; |
| 635 | skb_pull(skb, sizeof(struct fcoe_hdr)); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 636 | skb_reset_transport_header(skb); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 637 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 638 | ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft)); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 639 | fr_eof(fp) = ft->fcoe_eof; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 640 | skb_trim(skb, skb->len - sizeof(*ft)); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 641 | return 0; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 642 | drop: |
| 643 | dev_kfree_skb_irq(skb); |
| 644 | return -1; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 645 | } |
| 646 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 647 | /** |
| 648 | * fnic_update_mac_locked() - set data MAC address and filters. |
| 649 | * @fnic: fnic instance. |
| 650 | * @new: newly-assigned FCoE MAC address. |
| 651 | * |
| 652 | * Called with the fnic lock held. |
| 653 | */ |
| 654 | void fnic_update_mac_locked(struct fnic *fnic, u8 *new) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 655 | { |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 656 | u8 *ctl = fnic->ctlr.ctl_src_addr; |
| 657 | u8 *data = fnic->data_src_addr; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 658 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 659 | if (is_zero_ether_addr(new)) |
| 660 | new = ctl; |
Joe Perches | 6942df7 | 2013-09-02 03:32:33 +0000 | [diff] [blame] | 661 | if (ether_addr_equal(data, new)) |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 662 | return; |
| 663 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new); |
Joe Perches | 6942df7 | 2013-09-02 03:32:33 +0000 | [diff] [blame] | 664 | if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl)) |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 665 | vnic_dev_del_addr(fnic->vdev, data); |
| 666 | memcpy(data, new, ETH_ALEN); |
Joe Perches | 6942df7 | 2013-09-02 03:32:33 +0000 | [diff] [blame] | 667 | if (!ether_addr_equal(new, ctl)) |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 668 | vnic_dev_add_addr(fnic->vdev, new); |
| 669 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 670 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 671 | /** |
| 672 | * fnic_update_mac() - set data MAC address and filters. |
| 673 | * @lport: local port. |
| 674 | * @new: newly-assigned FCoE MAC address. |
| 675 | */ |
| 676 | void fnic_update_mac(struct fc_lport *lport, u8 *new) |
| 677 | { |
| 678 | struct fnic *fnic = lport_priv(lport); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 679 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 680 | spin_lock_irq(&fnic->fnic_lock); |
| 681 | fnic_update_mac_locked(fnic, new); |
| 682 | spin_unlock_irq(&fnic->fnic_lock); |
| 683 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 684 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 685 | /** |
| 686 | * fnic_set_port_id() - set the port_ID after successful FLOGI. |
| 687 | * @lport: local port. |
| 688 | * @port_id: assigned FC_ID. |
| 689 | * @fp: received frame containing the FLOGI accept or NULL. |
| 690 | * |
| 691 | * This is called from libfc when a new FC_ID has been assigned. |
| 692 | * This causes us to reset the firmware to FC_MODE and setup the new MAC |
| 693 | * address and FC_ID. |
| 694 | * |
| 695 | * It is also called with FC_ID 0 when we're logged off. |
| 696 | * |
| 697 | * If the FC_ID is due to point-to-point, fp may be NULL. |
| 698 | */ |
| 699 | void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp) |
| 700 | { |
| 701 | struct fnic *fnic = lport_priv(lport); |
| 702 | u8 *mac; |
| 703 | int ret; |
| 704 | |
| 705 | FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n", |
| 706 | port_id, fp); |
| 707 | |
| 708 | /* |
| 709 | * If we're clearing the FC_ID, change to use the ctl_src_addr. |
| 710 | * Set ethernet mode to send FLOGI. |
| 711 | */ |
| 712 | if (!port_id) { |
| 713 | fnic_update_mac(lport, fnic->ctlr.ctl_src_addr); |
| 714 | fnic_set_eth_mode(fnic); |
| 715 | return; |
| 716 | } |
| 717 | |
| 718 | if (fp) { |
| 719 | mac = fr_cb(fp)->granted_mac; |
| 720 | if (is_zero_ether_addr(mac)) { |
| 721 | /* non-FIP - FLOGI already accepted - ignore return */ |
| 722 | fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 723 | } |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 724 | fnic_update_mac(lport, mac); |
| 725 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 726 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 727 | /* Change state to reflect transition to FC mode */ |
| 728 | spin_lock_irq(&fnic->fnic_lock); |
| 729 | if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 730 | fnic->state = FNIC_IN_ETH_TRANS_FC_MODE; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 731 | else { |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 732 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 733 | "Unexpected fnic state %s while" |
| 734 | " processing flogi resp\n", |
| 735 | fnic_state_to_str(fnic->state)); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 736 | spin_unlock_irq(&fnic->fnic_lock); |
| 737 | return; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 738 | } |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 739 | spin_unlock_irq(&fnic->fnic_lock); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 740 | |
| 741 | /* |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 742 | * Send FLOGI registration to firmware to set up FC mode. |
| 743 | * The new address will be set up when registration completes. |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 744 | */ |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 745 | ret = fnic_flogi_reg_handler(fnic, port_id); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 746 | |
| 747 | if (ret < 0) { |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 748 | spin_lock_irq(&fnic->fnic_lock); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 749 | if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) |
| 750 | fnic->state = FNIC_IN_ETH_MODE; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 751 | spin_unlock_irq(&fnic->fnic_lock); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 752 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 753 | } |
| 754 | |
| 755 | static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc |
| 756 | *cq_desc, struct vnic_rq_buf *buf, |
| 757 | int skipped __attribute__((unused)), |
| 758 | void *opaque) |
| 759 | { |
| 760 | struct fnic *fnic = vnic_dev_priv(rq->vdev); |
| 761 | struct sk_buff *skb; |
| 762 | struct fc_frame *fp; |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 763 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 764 | unsigned int eth_hdrs_stripped; |
| 765 | u8 type, color, eop, sop, ingress_port, vlan_stripped; |
| 766 | u8 fcoe = 0, fcoe_sof, fcoe_eof; |
| 767 | u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0; |
| 768 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; |
| 769 | u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc; |
| 770 | u8 fcs_ok = 1, packet_error = 0; |
| 771 | u16 q_number, completed_index, bytes_written = 0, vlan, checksum; |
| 772 | u32 rss_hash; |
| 773 | u16 exchange_id, tmpl; |
| 774 | u8 sof = 0; |
| 775 | u8 eof = 0; |
| 776 | u32 fcp_bytes_written = 0; |
| 777 | unsigned long flags; |
| 778 | |
| 779 | pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, |
| 780 | PCI_DMA_FROMDEVICE); |
| 781 | skb = buf->os_buf; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 782 | fp = (struct fc_frame *)skb; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 783 | buf->os_buf = NULL; |
| 784 | |
| 785 | cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index); |
| 786 | if (type == CQ_DESC_TYPE_RQ_FCP) { |
| 787 | cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc, |
| 788 | &type, &color, &q_number, &completed_index, |
| 789 | &eop, &sop, &fcoe_fc_crc_ok, &exchange_id, |
| 790 | &tmpl, &fcp_bytes_written, &sof, &eof, |
| 791 | &ingress_port, &packet_error, |
| 792 | &fcoe_enc_error, &fcs_ok, &vlan_stripped, |
| 793 | &vlan); |
| 794 | eth_hdrs_stripped = 1; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 795 | skb_trim(skb, fcp_bytes_written); |
| 796 | fr_sof(fp) = sof; |
| 797 | fr_eof(fp) = eof; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 798 | |
| 799 | } else if (type == CQ_DESC_TYPE_RQ_ENET) { |
| 800 | cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, |
| 801 | &type, &color, &q_number, &completed_index, |
| 802 | &ingress_port, &fcoe, &eop, &sop, |
| 803 | &rss_type, &csum_not_calc, &rss_hash, |
| 804 | &bytes_written, &packet_error, |
| 805 | &vlan_stripped, &vlan, &checksum, |
| 806 | &fcoe_sof, &fcoe_fc_crc_ok, |
| 807 | &fcoe_enc_error, &fcoe_eof, |
| 808 | &tcp_udp_csum_ok, &udp, &tcp, |
| 809 | &ipv4_csum_ok, &ipv6, &ipv4, |
| 810 | &ipv4_fragment, &fcs_ok); |
| 811 | eth_hdrs_stripped = 0; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 812 | skb_trim(skb, bytes_written); |
| 813 | if (!fcs_ok) { |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 814 | atomic64_inc(&fnic_stats->misc_stats.frame_errors); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 815 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 816 | "fcs error. dropping packet.\n"); |
| 817 | goto drop; |
| 818 | } |
| 819 | if (fnic_import_rq_eth_pkt(fnic, skb)) |
| 820 | return; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 821 | |
| 822 | } else { |
| 823 | /* wrong CQ type*/ |
| 824 | shost_printk(KERN_ERR, fnic->lport->host, |
| 825 | "fnic rq_cmpl wrong cq type x%x\n", type); |
| 826 | goto drop; |
| 827 | } |
| 828 | |
| 829 | if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) { |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 830 | atomic64_inc(&fnic_stats->misc_stats.frame_errors); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 831 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 832 | "fnic rq_cmpl fcoe x%x fcsok x%x" |
| 833 | " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err" |
| 834 | " x%x\n", |
| 835 | fcoe, fcs_ok, packet_error, |
| 836 | fcoe_fc_crc_ok, fcoe_enc_error); |
| 837 | goto drop; |
| 838 | } |
| 839 | |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 840 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 841 | if (fnic->stop_rx_link_events) { |
| 842 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 843 | goto drop; |
| 844 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 845 | fr_dev(fp) = fnic->lport; |
| 846 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 847 | |
| 848 | skb_queue_tail(&fnic->frame_queue, skb); |
| 849 | queue_work(fnic_event_queue, &fnic->frame_work); |
| 850 | |
| 851 | return; |
| 852 | drop: |
| 853 | dev_kfree_skb_irq(skb); |
| 854 | } |
| 855 | |
| 856 | static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev, |
| 857 | struct cq_desc *cq_desc, u8 type, |
| 858 | u16 q_number, u16 completed_index, |
| 859 | void *opaque) |
| 860 | { |
| 861 | struct fnic *fnic = vnic_dev_priv(vdev); |
| 862 | |
| 863 | vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index, |
| 864 | VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv, |
| 865 | NULL); |
| 866 | return 0; |
| 867 | } |
| 868 | |
| 869 | int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do) |
| 870 | { |
| 871 | unsigned int tot_rq_work_done = 0, cur_work_done; |
| 872 | unsigned int i; |
| 873 | int err; |
| 874 | |
| 875 | for (i = 0; i < fnic->rq_count; i++) { |
| 876 | cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do, |
| 877 | fnic_rq_cmpl_handler_cont, |
| 878 | NULL); |
| 879 | if (cur_work_done) { |
| 880 | err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); |
| 881 | if (err) |
| 882 | shost_printk(KERN_ERR, fnic->lport->host, |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 883 | "fnic_alloc_rq_frame can't alloc" |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 884 | " frame\n"); |
| 885 | } |
| 886 | tot_rq_work_done += cur_work_done; |
| 887 | } |
| 888 | |
| 889 | return tot_rq_work_done; |
| 890 | } |
| 891 | |
| 892 | /* |
| 893 | * This function is called once at init time to allocate and fill RQ |
| 894 | * buffers. Subsequently, it is called in the interrupt context after RQ |
| 895 | * buffer processing to replenish the buffers in the RQ |
| 896 | */ |
| 897 | int fnic_alloc_rq_frame(struct vnic_rq *rq) |
| 898 | { |
| 899 | struct fnic *fnic = vnic_dev_priv(rq->vdev); |
| 900 | struct sk_buff *skb; |
| 901 | u16 len; |
| 902 | dma_addr_t pa; |
| 903 | |
| 904 | len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM; |
| 905 | skb = dev_alloc_skb(len); |
| 906 | if (!skb) { |
| 907 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 908 | "Unable to allocate RQ sk_buff\n"); |
| 909 | return -ENOMEM; |
| 910 | } |
| 911 | skb_reset_mac_header(skb); |
| 912 | skb_reset_transport_header(skb); |
| 913 | skb_reset_network_header(skb); |
| 914 | skb_put(skb, len); |
| 915 | pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE); |
| 916 | fnic_queue_rq_desc(rq, skb, pa, len); |
| 917 | return 0; |
| 918 | } |
| 919 | |
| 920 | void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) |
| 921 | { |
| 922 | struct fc_frame *fp = buf->os_buf; |
| 923 | struct fnic *fnic = vnic_dev_priv(rq->vdev); |
| 924 | |
| 925 | pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, |
| 926 | PCI_DMA_FROMDEVICE); |
| 927 | |
| 928 | dev_kfree_skb(fp_skb(fp)); |
| 929 | buf->os_buf = NULL; |
| 930 | } |
| 931 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 932 | /** |
| 933 | * fnic_eth_send() - Send Ethernet frame. |
| 934 | * @fip: fcoe_ctlr instance. |
| 935 | * @skb: Ethernet Frame, FIP, without VLAN encapsulation. |
| 936 | */ |
| 937 | void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 938 | { |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 939 | struct fnic *fnic = fnic_from_ctlr(fip); |
| 940 | struct vnic_wq *wq = &fnic->wq[0]; |
| 941 | dma_addr_t pa; |
| 942 | struct ethhdr *eth_hdr; |
| 943 | struct vlan_ethhdr *vlan_hdr; |
| 944 | unsigned long flags; |
| 945 | |
| 946 | if (!fnic->vlan_hw_insert) { |
| 947 | eth_hdr = (struct ethhdr *)skb_mac_header(skb); |
| 948 | vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, |
| 949 | sizeof(*vlan_hdr) - sizeof(*eth_hdr)); |
| 950 | memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN); |
| 951 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); |
| 952 | vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto; |
| 953 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); |
| 954 | } |
| 955 | |
| 956 | pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); |
| 957 | |
| 958 | spin_lock_irqsave(&fnic->wq_lock[0], flags); |
| 959 | if (!vnic_wq_desc_avail(wq)) { |
| 960 | pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE); |
| 961 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
| 962 | kfree_skb(skb); |
| 963 | return; |
| 964 | } |
| 965 | |
| 966 | fnic_queue_wq_eth_desc(wq, skb, pa, skb->len, |
Hiral Patel | c0773b7 | 2012-12-10 01:21:30 -0800 | [diff] [blame] | 967 | 0 /* hw inserts cos value */, |
| 968 | fnic->vlan_id, 1); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 969 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 970 | } |
| 971 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 972 | /* |
| 973 | * Send FC frame. |
| 974 | */ |
| 975 | static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 976 | { |
| 977 | struct vnic_wq *wq = &fnic->wq[0]; |
| 978 | struct sk_buff *skb; |
| 979 | dma_addr_t pa; |
| 980 | struct ethhdr *eth_hdr; |
| 981 | struct vlan_ethhdr *vlan_hdr; |
| 982 | struct fcoe_hdr *fcoe_hdr; |
| 983 | struct fc_frame_header *fh; |
| 984 | u32 tot_len, eth_hdr_len; |
| 985 | int ret = 0; |
| 986 | unsigned long flags; |
| 987 | |
| 988 | fh = fc_frame_header_get(fp); |
| 989 | skb = fp_skb(fp); |
| 990 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 991 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
| 992 | fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb)) |
| 993 | return 0; |
| 994 | |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 995 | if (!fnic->vlan_hw_insert) { |
| 996 | eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr); |
| 997 | vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len); |
| 998 | eth_hdr = (struct ethhdr *)vlan_hdr; |
| 999 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); |
| 1000 | vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE); |
| 1001 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); |
| 1002 | fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1); |
| 1003 | } else { |
| 1004 | eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr); |
| 1005 | eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len); |
| 1006 | eth_hdr->h_proto = htons(ETH_P_FCOE); |
| 1007 | fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1); |
| 1008 | } |
| 1009 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1010 | if (fnic->ctlr.map_dest) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1011 | fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1012 | else |
| 1013 | memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN); |
| 1014 | memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1015 | |
| 1016 | tot_len = skb->len; |
| 1017 | BUG_ON(tot_len % 4); |
| 1018 | |
| 1019 | memset(fcoe_hdr, 0, sizeof(*fcoe_hdr)); |
| 1020 | fcoe_hdr->fcoe_sof = fr_sof(fp); |
| 1021 | if (FC_FCOE_VER) |
| 1022 | FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER); |
| 1023 | |
| 1024 | pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE); |
| 1025 | |
| 1026 | spin_lock_irqsave(&fnic->wq_lock[0], flags); |
| 1027 | |
| 1028 | if (!vnic_wq_desc_avail(wq)) { |
| 1029 | pci_unmap_single(fnic->pdev, pa, |
| 1030 | tot_len, PCI_DMA_TODEVICE); |
| 1031 | ret = -1; |
| 1032 | goto fnic_send_frame_end; |
| 1033 | } |
| 1034 | |
| 1035 | fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp), |
Hiral Patel | c0773b7 | 2012-12-10 01:21:30 -0800 | [diff] [blame] | 1036 | 0 /* hw inserts cos value */, |
| 1037 | fnic->vlan_id, 1, 1, 1); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1038 | fnic_send_frame_end: |
| 1039 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
| 1040 | |
| 1041 | if (ret) |
| 1042 | dev_kfree_skb_any(fp_skb(fp)); |
| 1043 | |
| 1044 | return ret; |
| 1045 | } |
| 1046 | |
| 1047 | /* |
| 1048 | * fnic_send |
| 1049 | * Routine to send a raw frame |
| 1050 | */ |
| 1051 | int fnic_send(struct fc_lport *lp, struct fc_frame *fp) |
| 1052 | { |
| 1053 | struct fnic *fnic = lport_priv(lp); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1054 | unsigned long flags; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1055 | |
| 1056 | if (fnic->in_remove) { |
| 1057 | dev_kfree_skb(fp_skb(fp)); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1058 | return -1; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1059 | } |
| 1060 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1061 | /* |
| 1062 | * Queue frame if in a transitional state. |
| 1063 | * This occurs while registering the Port_ID / MAC address after FLOGI. |
| 1064 | */ |
| 1065 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 1066 | if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) { |
| 1067 | skb_queue_tail(&fnic->tx_queue, fp_skb(fp)); |
| 1068 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 1069 | return 0; |
| 1070 | } |
| 1071 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1072 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1073 | return fnic_send_frame(fnic, fp); |
| 1074 | } |
| 1075 | |
| 1076 | /** |
| 1077 | * fnic_flush_tx() - send queued frames. |
| 1078 | * @fnic: fnic device |
| 1079 | * |
| 1080 | * Send frames that were waiting to go out in FC or Ethernet mode. |
| 1081 | * Whenever changing modes we purge queued frames, so these frames should |
| 1082 | * be queued for the stable mode that we're in, either FC or Ethernet. |
| 1083 | * |
| 1084 | * Called without fnic_lock held. |
| 1085 | */ |
| 1086 | void fnic_flush_tx(struct fnic *fnic) |
| 1087 | { |
| 1088 | struct sk_buff *skb; |
| 1089 | struct fc_frame *fp; |
| 1090 | |
Brian Uchino | d9e9ab5 | 2010-04-09 14:22:49 -0700 | [diff] [blame] | 1091 | while ((skb = skb_dequeue(&fnic->tx_queue))) { |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1092 | fp = (struct fc_frame *)skb; |
| 1093 | fnic_send_frame(fnic, fp); |
| 1094 | } |
| 1095 | } |
| 1096 | |
| 1097 | /** |
| 1098 | * fnic_set_eth_mode() - put fnic into ethernet mode. |
| 1099 | * @fnic: fnic device |
| 1100 | * |
| 1101 | * Called without fnic lock held. |
| 1102 | */ |
| 1103 | static void fnic_set_eth_mode(struct fnic *fnic) |
| 1104 | { |
| 1105 | unsigned long flags; |
| 1106 | enum fnic_state old_state; |
| 1107 | int ret; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1108 | |
| 1109 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 1110 | again: |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1111 | old_state = fnic->state; |
| 1112 | switch (old_state) { |
| 1113 | case FNIC_IN_FC_MODE: |
| 1114 | case FNIC_IN_ETH_TRANS_FC_MODE: |
| 1115 | default: |
| 1116 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1117 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 1118 | |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1119 | ret = fnic_fw_reset_handler(fnic); |
| 1120 | |
| 1121 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 1122 | if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE) |
| 1123 | goto again; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1124 | if (ret) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1125 | fnic->state = old_state; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1126 | break; |
| 1127 | |
| 1128 | case FNIC_IN_FC_TRANS_ETH_MODE: |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1129 | case FNIC_IN_ETH_MODE: |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1130 | break; |
| 1131 | } |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1132 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1133 | } |
| 1134 | |
| 1135 | static void fnic_wq_complete_frame_send(struct vnic_wq *wq, |
| 1136 | struct cq_desc *cq_desc, |
| 1137 | struct vnic_wq_buf *buf, void *opaque) |
| 1138 | { |
| 1139 | struct sk_buff *skb = buf->os_buf; |
| 1140 | struct fc_frame *fp = (struct fc_frame *)skb; |
| 1141 | struct fnic *fnic = vnic_dev_priv(wq->vdev); |
| 1142 | |
| 1143 | pci_unmap_single(fnic->pdev, buf->dma_addr, |
| 1144 | buf->len, PCI_DMA_TODEVICE); |
| 1145 | dev_kfree_skb_irq(fp_skb(fp)); |
| 1146 | buf->os_buf = NULL; |
| 1147 | } |
| 1148 | |
| 1149 | static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev, |
| 1150 | struct cq_desc *cq_desc, u8 type, |
| 1151 | u16 q_number, u16 completed_index, |
| 1152 | void *opaque) |
| 1153 | { |
| 1154 | struct fnic *fnic = vnic_dev_priv(vdev); |
| 1155 | unsigned long flags; |
| 1156 | |
| 1157 | spin_lock_irqsave(&fnic->wq_lock[q_number], flags); |
| 1158 | vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index, |
| 1159 | fnic_wq_complete_frame_send, NULL); |
| 1160 | spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags); |
| 1161 | |
| 1162 | return 0; |
| 1163 | } |
| 1164 | |
| 1165 | int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do) |
| 1166 | { |
| 1167 | unsigned int wq_work_done = 0; |
| 1168 | unsigned int i; |
| 1169 | |
| 1170 | for (i = 0; i < fnic->raw_wq_count; i++) { |
| 1171 | wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i], |
| 1172 | work_to_do, |
| 1173 | fnic_wq_cmpl_handler_cont, |
| 1174 | NULL); |
| 1175 | } |
| 1176 | |
| 1177 | return wq_work_done; |
| 1178 | } |
| 1179 | |
| 1180 | |
| 1181 | void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) |
| 1182 | { |
| 1183 | struct fc_frame *fp = buf->os_buf; |
| 1184 | struct fnic *fnic = vnic_dev_priv(wq->vdev); |
| 1185 | |
| 1186 | pci_unmap_single(fnic->pdev, buf->dma_addr, |
| 1187 | buf->len, PCI_DMA_TODEVICE); |
| 1188 | |
| 1189 | dev_kfree_skb(fp_skb(fp)); |
| 1190 | buf->os_buf = NULL; |
| 1191 | } |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 1192 | |
| 1193 | void fnic_fcoe_reset_vlans(struct fnic *fnic) |
| 1194 | { |
| 1195 | unsigned long flags; |
| 1196 | struct fcoe_vlan *vlan; |
| 1197 | struct fcoe_vlan *next; |
| 1198 | |
| 1199 | /* |
| 1200 | * indicate a link down to fcoe so that all fcf's are free'd |
| 1201 | * might not be required since we did this before sending vlan |
| 1202 | * discovery request |
| 1203 | */ |
| 1204 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 1205 | if (!list_empty(&fnic->vlans)) { |
| 1206 | list_for_each_entry_safe(vlan, next, &fnic->vlans, list) { |
| 1207 | list_del(&vlan->list); |
| 1208 | kfree(vlan); |
| 1209 | } |
| 1210 | } |
| 1211 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 1212 | } |
| 1213 | |
| 1214 | void fnic_handle_fip_timer(struct fnic *fnic) |
| 1215 | { |
| 1216 | unsigned long flags; |
| 1217 | struct fcoe_vlan *vlan; |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 1218 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 1219 | u64 sol_time; |
| 1220 | |
| 1221 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 1222 | if (fnic->stop_rx_link_events) { |
| 1223 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 1224 | return; |
| 1225 | } |
| 1226 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 1227 | |
| 1228 | if (fnic->ctlr.mode == FIP_ST_NON_FIP) |
| 1229 | return; |
| 1230 | |
| 1231 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 1232 | if (list_empty(&fnic->vlans)) { |
| 1233 | /* no vlans available, try again */ |
| 1234 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 1235 | "Start VLAN Discovery\n"); |
| 1236 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 1237 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
| 1238 | return; |
| 1239 | } |
| 1240 | |
| 1241 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
| 1242 | shost_printk(KERN_DEBUG, fnic->lport->host, |
| 1243 | "fip_timer: vlan %d state %d sol_count %d\n", |
| 1244 | vlan->vid, vlan->state, vlan->sol_count); |
| 1245 | switch (vlan->state) { |
| 1246 | case FIP_VLAN_USED: |
| 1247 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 1248 | "FIP VLAN is selected for FC transaction\n"); |
| 1249 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 1250 | break; |
| 1251 | case FIP_VLAN_FAILED: |
| 1252 | /* if all vlans are in failed state, restart vlan disc */ |
| 1253 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 1254 | "Start VLAN Discovery\n"); |
| 1255 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 1256 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
| 1257 | break; |
| 1258 | case FIP_VLAN_SENT: |
| 1259 | if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) { |
| 1260 | /* |
| 1261 | * no response on this vlan, remove from the list. |
| 1262 | * Try the next vlan |
| 1263 | */ |
| 1264 | shost_printk(KERN_INFO, fnic->lport->host, |
| 1265 | "Dequeue this VLAN ID %d from list\n", |
| 1266 | vlan->vid); |
| 1267 | list_del(&vlan->list); |
| 1268 | kfree(vlan); |
| 1269 | vlan = NULL; |
| 1270 | if (list_empty(&fnic->vlans)) { |
| 1271 | /* we exhausted all vlans, restart vlan disc */ |
| 1272 | spin_unlock_irqrestore(&fnic->vlans_lock, |
| 1273 | flags); |
| 1274 | shost_printk(KERN_INFO, fnic->lport->host, |
| 1275 | "fip_timer: vlan list empty, " |
| 1276 | "trigger vlan disc\n"); |
| 1277 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
| 1278 | return; |
| 1279 | } |
| 1280 | /* check the next vlan */ |
| 1281 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, |
| 1282 | list); |
| 1283 | fnic->set_vlan(fnic, vlan->vid); |
| 1284 | vlan->state = FIP_VLAN_SENT; /* sent now */ |
| 1285 | } |
| 1286 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 1287 | atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 1288 | vlan->sol_count++; |
| 1289 | sol_time = jiffies + msecs_to_jiffies |
| 1290 | (FCOE_CTLR_START_DELAY); |
| 1291 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); |
| 1292 | break; |
| 1293 | } |
| 1294 | } |