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 Shah | 86001f2 | 2014-05-02 17:46:31 -0700 | [diff] [blame] | 38 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 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) { |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 69 | if (!fnic->link_status) { |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 70 | /* DOWN -> DOWN */ |
| 71 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 72 | fnic_fc_trace_set_data(fnic->lport->host->host_no, |
| 73 | FNIC_FC_LE, "Link Status: DOWN->DOWN", |
| 74 | strlen("Link Status: DOWN->DOWN")); |
| 75 | } else { |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 76 | if (old_link_down_cnt != fnic->link_down_cnt) { |
| 77 | /* UP -> DOWN -> UP */ |
| 78 | fnic->lport->host_stats.link_failure_count++; |
| 79 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 80 | fnic_fc_trace_set_data( |
| 81 | fnic->lport->host->host_no, |
| 82 | FNIC_FC_LE, |
| 83 | "Link Status:UP_DOWN_UP", |
| 84 | strlen("Link_Status:UP_DOWN_UP") |
| 85 | ); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 86 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 87 | "link down\n"); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 88 | fcoe_ctlr_link_down(&fnic->ctlr); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 89 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
| 90 | /* start FCoE VLAN discovery */ |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 91 | fnic_fc_trace_set_data( |
| 92 | fnic->lport->host->host_no, |
| 93 | FNIC_FC_LE, |
| 94 | "Link Status: UP_DOWN_UP_VLAN", |
| 95 | strlen( |
| 96 | "Link Status: UP_DOWN_UP_VLAN") |
| 97 | ); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 98 | fnic_fcoe_send_vlan_req(fnic); |
| 99 | return; |
| 100 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 101 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 102 | "link up\n"); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 103 | fcoe_ctlr_link_up(&fnic->ctlr); |
Hiral Shah | 86001f2 | 2014-05-02 17:46:31 -0700 | [diff] [blame] | 104 | } else { |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 105 | /* UP -> UP */ |
| 106 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 107 | fnic_fc_trace_set_data( |
| 108 | fnic->lport->host->host_no, FNIC_FC_LE, |
| 109 | "Link Status: UP_UP", |
| 110 | strlen("Link Status: UP_UP")); |
Hiral Shah | 86001f2 | 2014-05-02 17:46:31 -0700 | [diff] [blame] | 111 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 112 | } |
| 113 | } else if (fnic->link_status) { |
| 114 | /* DOWN -> UP */ |
| 115 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 116 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
| 117 | /* start FCoE VLAN discovery */ |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 118 | fnic_fc_trace_set_data( |
| 119 | fnic->lport->host->host_no, |
| 120 | FNIC_FC_LE, "Link Status: DOWN_UP_VLAN", |
| 121 | strlen("Link Status: DOWN_UP_VLAN")); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 122 | fnic_fcoe_send_vlan_req(fnic); |
| 123 | return; |
| 124 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 125 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n"); |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 126 | fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE, |
| 127 | "Link Status: DOWN_UP", strlen("Link Status: DOWN_UP")); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 128 | fcoe_ctlr_link_up(&fnic->ctlr); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 129 | } else { |
| 130 | /* UP -> DOWN */ |
| 131 | fnic->lport->host_stats.link_failure_count++; |
| 132 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 133 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n"); |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 134 | fnic_fc_trace_set_data( |
| 135 | fnic->lport->host->host_no, FNIC_FC_LE, |
| 136 | "Link Status: UP_DOWN", |
| 137 | strlen("Link Status: UP_DOWN")); |
Hiral Shah | 0ee7b87 | 2014-11-10 12:54:35 -0800 | [diff] [blame] | 138 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
| 139 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 140 | "deleting fip-timer during link-down\n"); |
| 141 | del_timer_sync(&fnic->fip_timer); |
| 142 | } |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 143 | fcoe_ctlr_link_down(&fnic->ctlr); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * This function passes incoming fabric frames to libFC |
| 150 | */ |
| 151 | void fnic_handle_frame(struct work_struct *work) |
| 152 | { |
| 153 | struct fnic *fnic = container_of(work, struct fnic, frame_work); |
| 154 | struct fc_lport *lp = fnic->lport; |
| 155 | unsigned long flags; |
| 156 | struct sk_buff *skb; |
| 157 | struct fc_frame *fp; |
| 158 | |
| 159 | while ((skb = skb_dequeue(&fnic->frame_queue))) { |
| 160 | |
| 161 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 162 | if (fnic->stop_rx_link_events) { |
| 163 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 164 | dev_kfree_skb(skb); |
| 165 | return; |
| 166 | } |
| 167 | fp = (struct fc_frame *)skb; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 168 | |
| 169 | /* |
| 170 | * If we're in a transitional state, just re-queue and return. |
| 171 | * The queue will be serviced when we get to a stable state. |
| 172 | */ |
| 173 | if (fnic->state != FNIC_IN_FC_MODE && |
| 174 | fnic->state != FNIC_IN_ETH_MODE) { |
| 175 | skb_queue_head(&fnic->frame_queue, skb); |
| 176 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 177 | return; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 178 | } |
| 179 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 180 | |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 181 | fc_exch_recv(lp, fp); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 182 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 183 | } |
| 184 | |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 185 | void fnic_fcoe_evlist_free(struct fnic *fnic) |
| 186 | { |
| 187 | struct fnic_event *fevt = NULL; |
| 188 | struct fnic_event *next = NULL; |
| 189 | unsigned long flags; |
| 190 | |
| 191 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 192 | if (list_empty(&fnic->evlist)) { |
| 193 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 194 | return; |
| 195 | } |
| 196 | |
| 197 | list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
| 198 | list_del(&fevt->list); |
| 199 | kfree(fevt); |
| 200 | } |
| 201 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 202 | } |
| 203 | |
| 204 | void fnic_handle_event(struct work_struct *work) |
| 205 | { |
| 206 | struct fnic *fnic = container_of(work, struct fnic, event_work); |
| 207 | struct fnic_event *fevt = NULL; |
| 208 | struct fnic_event *next = NULL; |
| 209 | unsigned long flags; |
| 210 | |
| 211 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 212 | if (list_empty(&fnic->evlist)) { |
| 213 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 214 | return; |
| 215 | } |
| 216 | |
| 217 | list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
| 218 | if (fnic->stop_rx_link_events) { |
| 219 | list_del(&fevt->list); |
| 220 | kfree(fevt); |
| 221 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 222 | return; |
| 223 | } |
| 224 | /* |
| 225 | * If we're in a transitional state, just re-queue and return. |
| 226 | * The queue will be serviced when we get to a stable state. |
| 227 | */ |
| 228 | if (fnic->state != FNIC_IN_FC_MODE && |
| 229 | fnic->state != FNIC_IN_ETH_MODE) { |
| 230 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 231 | return; |
| 232 | } |
| 233 | |
| 234 | list_del(&fevt->list); |
| 235 | switch (fevt->event) { |
| 236 | case FNIC_EVT_START_VLAN_DISC: |
| 237 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 238 | fnic_fcoe_send_vlan_req(fnic); |
| 239 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 240 | break; |
| 241 | case FNIC_EVT_START_FCF_DISC: |
| 242 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 243 | "Start FCF Discovery\n"); |
| 244 | fnic_fcoe_start_fcf_disc(fnic); |
| 245 | break; |
| 246 | default: |
| 247 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 248 | "Unknown event 0x%x\n", fevt->event); |
| 249 | break; |
| 250 | } |
| 251 | kfree(fevt); |
| 252 | } |
| 253 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * Check if the Received FIP FLOGI frame is rejected |
| 258 | * @fip: The FCoE controller that received the frame |
| 259 | * @skb: The received FIP frame |
| 260 | * |
| 261 | * Returns non-zero if the frame is rejected with unsupported cmd with |
| 262 | * insufficient resource els explanation. |
| 263 | */ |
| 264 | static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip, |
| 265 | struct sk_buff *skb) |
| 266 | { |
| 267 | struct fc_lport *lport = fip->lp; |
| 268 | struct fip_header *fiph; |
| 269 | struct fc_frame_header *fh = NULL; |
| 270 | struct fip_desc *desc; |
| 271 | struct fip_encaps *els; |
| 272 | enum fip_desc_type els_dtype = 0; |
| 273 | u16 op; |
| 274 | u8 els_op; |
| 275 | u8 sub; |
| 276 | |
| 277 | size_t els_len = 0; |
| 278 | size_t rlen; |
| 279 | size_t dlen = 0; |
| 280 | |
| 281 | if (skb_linearize(skb)) |
| 282 | return 0; |
| 283 | |
| 284 | if (skb->len < sizeof(*fiph)) |
| 285 | return 0; |
| 286 | |
| 287 | fiph = (struct fip_header *)skb->data; |
| 288 | op = ntohs(fiph->fip_op); |
| 289 | sub = fiph->fip_subcode; |
| 290 | |
| 291 | if (op != FIP_OP_LS) |
| 292 | return 0; |
| 293 | |
| 294 | if (sub != FIP_SC_REP) |
| 295 | return 0; |
| 296 | |
| 297 | rlen = ntohs(fiph->fip_dl_len) * 4; |
| 298 | if (rlen + sizeof(*fiph) > skb->len) |
| 299 | return 0; |
| 300 | |
| 301 | desc = (struct fip_desc *)(fiph + 1); |
| 302 | dlen = desc->fip_dlen * FIP_BPW; |
| 303 | |
| 304 | if (desc->fip_dtype == FIP_DT_FLOGI) { |
| 305 | |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 306 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) |
| 307 | return 0; |
| 308 | |
| 309 | els_len = dlen - sizeof(*els); |
| 310 | els = (struct fip_encaps *)desc; |
| 311 | fh = (struct fc_frame_header *)(els + 1); |
| 312 | els_dtype = desc->fip_dtype; |
| 313 | |
| 314 | if (!fh) |
| 315 | return 0; |
| 316 | |
| 317 | /* |
| 318 | * ELS command code, reason and explanation should be = Reject, |
| 319 | * unsupported command and insufficient resource |
| 320 | */ |
| 321 | els_op = *(u8 *)(fh + 1); |
| 322 | if (els_op == ELS_LS_RJT) { |
| 323 | shost_printk(KERN_INFO, lport->host, |
| 324 | "Flogi Request Rejected by Switch\n"); |
| 325 | return 1; |
| 326 | } |
| 327 | shost_printk(KERN_INFO, lport->host, |
| 328 | "Flogi Request Accepted by Switch\n"); |
| 329 | } |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | static void fnic_fcoe_send_vlan_req(struct fnic *fnic) |
| 334 | { |
| 335 | struct fcoe_ctlr *fip = &fnic->ctlr; |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 336 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 337 | struct sk_buff *skb; |
| 338 | char *eth_fr; |
| 339 | int fr_len; |
| 340 | struct fip_vlan *vlan; |
| 341 | u64 vlan_tov; |
| 342 | |
| 343 | fnic_fcoe_reset_vlans(fnic); |
| 344 | fnic->set_vlan(fnic, 0); |
| 345 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
| 346 | "Sending VLAN request...\n"); |
| 347 | skb = dev_alloc_skb(sizeof(struct fip_vlan)); |
| 348 | if (!skb) |
| 349 | return; |
| 350 | |
| 351 | fr_len = sizeof(*vlan); |
| 352 | eth_fr = (char *)skb->data; |
| 353 | vlan = (struct fip_vlan *)eth_fr; |
| 354 | |
| 355 | memset(vlan, 0, sizeof(*vlan)); |
| 356 | memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
| 357 | memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN); |
| 358 | vlan->eth.h_proto = htons(ETH_P_FIP); |
| 359 | |
| 360 | vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); |
| 361 | vlan->fip.fip_op = htons(FIP_OP_VLAN); |
Hannes Reinecke | 6a551c1 | 2016-07-04 10:29:18 +0200 | [diff] [blame] | 362 | vlan->fip.fip_subcode = FIP_SC_VL_NOTE; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 363 | vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW); |
| 364 | |
| 365 | vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; |
| 366 | vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW; |
| 367 | memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); |
| 368 | |
| 369 | vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; |
| 370 | vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW; |
| 371 | put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn); |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 372 | atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 373 | |
| 374 | skb_put(skb, sizeof(*vlan)); |
| 375 | skb->protocol = htons(ETH_P_FIP); |
| 376 | skb_reset_mac_header(skb); |
| 377 | skb_reset_network_header(skb); |
| 378 | fip->send(fip, skb); |
| 379 | |
| 380 | /* set a timer so that we can retry if there no response */ |
| 381 | vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV); |
| 382 | mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov)); |
| 383 | } |
| 384 | |
| 385 | static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb) |
| 386 | { |
| 387 | struct fcoe_ctlr *fip = &fnic->ctlr; |
| 388 | struct fip_header *fiph; |
| 389 | struct fip_desc *desc; |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 390 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 391 | u16 vid; |
| 392 | size_t rlen; |
| 393 | size_t dlen; |
| 394 | struct fcoe_vlan *vlan; |
| 395 | u64 sol_time; |
| 396 | unsigned long flags; |
| 397 | |
| 398 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
| 399 | "Received VLAN response...\n"); |
| 400 | |
| 401 | fiph = (struct fip_header *) skb->data; |
| 402 | |
| 403 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
| 404 | "Received VLAN response... OP 0x%x SUB_OP 0x%x\n", |
| 405 | ntohs(fiph->fip_op), fiph->fip_subcode); |
| 406 | |
| 407 | rlen = ntohs(fiph->fip_dl_len) * 4; |
| 408 | fnic_fcoe_reset_vlans(fnic); |
| 409 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 410 | desc = (struct fip_desc *)(fiph + 1); |
| 411 | while (rlen > 0) { |
| 412 | dlen = desc->fip_dlen * FIP_BPW; |
| 413 | switch (desc->fip_dtype) { |
| 414 | case FIP_DT_VLAN: |
| 415 | vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan); |
| 416 | shost_printk(KERN_INFO, fnic->lport->host, |
| 417 | "process_vlan_resp: FIP VLAN %d\n", vid); |
| 418 | vlan = kmalloc(sizeof(*vlan), |
| 419 | GFP_ATOMIC); |
| 420 | if (!vlan) { |
| 421 | /* retry from timer */ |
| 422 | spin_unlock_irqrestore(&fnic->vlans_lock, |
| 423 | flags); |
| 424 | goto out; |
| 425 | } |
| 426 | memset(vlan, 0, sizeof(struct fcoe_vlan)); |
| 427 | vlan->vid = vid & 0x0fff; |
| 428 | vlan->state = FIP_VLAN_AVAIL; |
| 429 | list_add_tail(&vlan->list, &fnic->vlans); |
| 430 | break; |
| 431 | } |
| 432 | desc = (struct fip_desc *)((char *)desc + dlen); |
| 433 | rlen -= dlen; |
| 434 | } |
| 435 | |
| 436 | /* any VLAN descriptors present ? */ |
| 437 | if (list_empty(&fnic->vlans)) { |
| 438 | /* retry from timer */ |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 439 | atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 440 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
| 441 | "No VLAN descriptors in FIP VLAN response\n"); |
| 442 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 443 | goto out; |
| 444 | } |
| 445 | |
| 446 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
| 447 | fnic->set_vlan(fnic, vlan->vid); |
| 448 | vlan->state = FIP_VLAN_SENT; /* sent now */ |
| 449 | vlan->sol_count++; |
| 450 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 451 | |
| 452 | /* start the solicitation */ |
| 453 | fcoe_ctlr_link_up(fip); |
| 454 | |
| 455 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
| 456 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); |
| 457 | out: |
| 458 | return; |
| 459 | } |
| 460 | |
| 461 | static void fnic_fcoe_start_fcf_disc(struct fnic *fnic) |
| 462 | { |
| 463 | unsigned long flags; |
| 464 | struct fcoe_vlan *vlan; |
| 465 | u64 sol_time; |
| 466 | |
| 467 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 468 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
| 469 | fnic->set_vlan(fnic, vlan->vid); |
| 470 | vlan->state = FIP_VLAN_SENT; /* sent now */ |
| 471 | vlan->sol_count = 1; |
| 472 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 473 | |
| 474 | /* start the solicitation */ |
| 475 | fcoe_ctlr_link_up(&fnic->ctlr); |
| 476 | |
| 477 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
| 478 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); |
| 479 | } |
| 480 | |
| 481 | static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag) |
| 482 | { |
| 483 | unsigned long flags; |
| 484 | struct fcoe_vlan *fvlan; |
| 485 | |
| 486 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 487 | if (list_empty(&fnic->vlans)) { |
| 488 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 489 | return -EINVAL; |
| 490 | } |
| 491 | |
| 492 | fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
| 493 | if (fvlan->state == FIP_VLAN_USED) { |
| 494 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | if (fvlan->state == FIP_VLAN_SENT) { |
| 499 | fvlan->state = FIP_VLAN_USED; |
| 500 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 501 | return 0; |
| 502 | } |
| 503 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 504 | return -EINVAL; |
| 505 | } |
| 506 | |
| 507 | static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev) |
| 508 | { |
| 509 | struct fnic_event *fevt; |
| 510 | unsigned long flags; |
| 511 | |
| 512 | fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC); |
| 513 | if (!fevt) |
| 514 | return; |
| 515 | |
| 516 | fevt->fnic = fnic; |
| 517 | fevt->event = ev; |
| 518 | |
| 519 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 520 | list_add_tail(&fevt->list, &fnic->evlist); |
| 521 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 522 | |
| 523 | schedule_work(&fnic->event_work); |
| 524 | } |
| 525 | |
| 526 | static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb) |
| 527 | { |
| 528 | struct fip_header *fiph; |
| 529 | int ret = 1; |
| 530 | u16 op; |
| 531 | u8 sub; |
| 532 | |
| 533 | if (!skb || !(skb->data)) |
| 534 | return -1; |
| 535 | |
| 536 | if (skb_linearize(skb)) |
| 537 | goto drop; |
| 538 | |
| 539 | fiph = (struct fip_header *)skb->data; |
| 540 | op = ntohs(fiph->fip_op); |
| 541 | sub = fiph->fip_subcode; |
| 542 | |
| 543 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
| 544 | goto drop; |
| 545 | |
| 546 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) |
| 547 | goto drop; |
| 548 | |
| 549 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) { |
| 550 | if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags))) |
| 551 | goto drop; |
| 552 | /* pass it on to fcoe */ |
| 553 | ret = 1; |
Hannes Reinecke | 6a551c1 | 2016-07-04 10:29:18 +0200 | [diff] [blame] | 554 | } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) { |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 555 | /* set the vlan as used */ |
| 556 | fnic_fcoe_process_vlan_resp(fnic, skb); |
| 557 | ret = 0; |
| 558 | } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) { |
| 559 | /* received CVL request, restart vlan disc */ |
| 560 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
| 561 | /* pass it on to fcoe */ |
| 562 | ret = 1; |
| 563 | } |
| 564 | drop: |
| 565 | return ret; |
| 566 | } |
| 567 | |
| 568 | void fnic_handle_fip_frame(struct work_struct *work) |
| 569 | { |
| 570 | struct fnic *fnic = container_of(work, struct fnic, fip_frame_work); |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 571 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 572 | unsigned long flags; |
| 573 | struct sk_buff *skb; |
| 574 | struct ethhdr *eh; |
| 575 | |
| 576 | while ((skb = skb_dequeue(&fnic->fip_frame_queue))) { |
| 577 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 578 | if (fnic->stop_rx_link_events) { |
| 579 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 580 | dev_kfree_skb(skb); |
| 581 | return; |
| 582 | } |
| 583 | /* |
| 584 | * If we're in a transitional state, just re-queue and return. |
| 585 | * The queue will be serviced when we get to a stable state. |
| 586 | */ |
| 587 | if (fnic->state != FNIC_IN_FC_MODE && |
| 588 | fnic->state != FNIC_IN_ETH_MODE) { |
| 589 | skb_queue_head(&fnic->fip_frame_queue, skb); |
| 590 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 591 | return; |
| 592 | } |
| 593 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 594 | eh = (struct ethhdr *)skb->data; |
| 595 | if (eh->h_proto == htons(ETH_P_FIP)) { |
| 596 | skb_pull(skb, sizeof(*eh)); |
| 597 | if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) { |
| 598 | dev_kfree_skb(skb); |
| 599 | continue; |
| 600 | } |
| 601 | /* |
| 602 | * If there's FLOGI rejects - clear all |
| 603 | * fcf's & restart from scratch |
| 604 | */ |
| 605 | if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) { |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 606 | atomic64_inc( |
| 607 | &fnic_stats->vlan_stats.flogi_rejects); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 608 | shost_printk(KERN_INFO, fnic->lport->host, |
| 609 | "Trigger a Link down - VLAN Disc\n"); |
| 610 | fcoe_ctlr_link_down(&fnic->ctlr); |
| 611 | /* start FCoE VLAN discovery */ |
| 612 | fnic_fcoe_send_vlan_req(fnic); |
| 613 | dev_kfree_skb(skb); |
| 614 | continue; |
| 615 | } |
| 616 | fcoe_ctlr_recv(&fnic->ctlr, skb); |
| 617 | continue; |
| 618 | } |
| 619 | } |
| 620 | } |
| 621 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 622 | /** |
| 623 | * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame. |
| 624 | * @fnic: fnic instance. |
| 625 | * @skb: Ethernet Frame. |
| 626 | */ |
| 627 | 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] | 628 | { |
| 629 | struct fc_frame *fp; |
| 630 | struct ethhdr *eh; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 631 | struct fcoe_hdr *fcoe_hdr; |
| 632 | struct fcoe_crc_eof *ft; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 633 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 634 | /* |
| 635 | * Undo VLAN encapsulation if present. |
| 636 | */ |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 637 | eh = (struct ethhdr *)skb->data; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 638 | if (eh->h_proto == htons(ETH_P_8021Q)) { |
| 639 | memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2); |
| 640 | eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN); |
| 641 | skb_reset_mac_header(skb); |
| 642 | } |
| 643 | if (eh->h_proto == htons(ETH_P_FIP)) { |
Hiral Patel | d7fadce | 2013-02-25 16:18:37 -0800 | [diff] [blame] | 644 | if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) { |
| 645 | printk(KERN_ERR "Dropped FIP frame, as firmware " |
| 646 | "uses non-FIP mode, Enable FIP " |
| 647 | "using UCSM\n"); |
| 648 | goto drop; |
| 649 | } |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 650 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, |
| 651 | FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) { |
| 652 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
| 653 | } |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 654 | skb_queue_tail(&fnic->fip_frame_queue, skb); |
| 655 | queue_work(fnic_fip_queue, &fnic->fip_frame_work); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 656 | return 1; /* let caller know packet was used */ |
| 657 | } |
| 658 | if (eh->h_proto != htons(ETH_P_FCOE)) |
| 659 | goto drop; |
| 660 | skb_set_network_header(skb, sizeof(*eh)); |
| 661 | skb_pull(skb, sizeof(*eh)); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 662 | |
| 663 | fcoe_hdr = (struct fcoe_hdr *)skb->data; |
| 664 | if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER) |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 665 | goto drop; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 666 | |
| 667 | fp = (struct fc_frame *)skb; |
| 668 | fc_frame_init(fp); |
| 669 | fr_sof(fp) = fcoe_hdr->fcoe_sof; |
| 670 | skb_pull(skb, sizeof(struct fcoe_hdr)); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 671 | skb_reset_transport_header(skb); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 672 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 673 | ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft)); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 674 | fr_eof(fp) = ft->fcoe_eof; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 675 | skb_trim(skb, skb->len - sizeof(*ft)); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 676 | return 0; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 677 | drop: |
| 678 | dev_kfree_skb_irq(skb); |
| 679 | return -1; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 680 | } |
| 681 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 682 | /** |
| 683 | * fnic_update_mac_locked() - set data MAC address and filters. |
| 684 | * @fnic: fnic instance. |
| 685 | * @new: newly-assigned FCoE MAC address. |
| 686 | * |
| 687 | * Called with the fnic lock held. |
| 688 | */ |
| 689 | void fnic_update_mac_locked(struct fnic *fnic, u8 *new) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 690 | { |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 691 | u8 *ctl = fnic->ctlr.ctl_src_addr; |
| 692 | u8 *data = fnic->data_src_addr; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 693 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 694 | if (is_zero_ether_addr(new)) |
| 695 | new = ctl; |
Joe Perches | 6942df7 | 2013-09-02 03:32:33 +0000 | [diff] [blame] | 696 | if (ether_addr_equal(data, new)) |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 697 | return; |
| 698 | 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] | 699 | if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl)) |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 700 | vnic_dev_del_addr(fnic->vdev, data); |
| 701 | memcpy(data, new, ETH_ALEN); |
Joe Perches | 6942df7 | 2013-09-02 03:32:33 +0000 | [diff] [blame] | 702 | if (!ether_addr_equal(new, ctl)) |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 703 | vnic_dev_add_addr(fnic->vdev, new); |
| 704 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 705 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 706 | /** |
| 707 | * fnic_update_mac() - set data MAC address and filters. |
| 708 | * @lport: local port. |
| 709 | * @new: newly-assigned FCoE MAC address. |
| 710 | */ |
| 711 | void fnic_update_mac(struct fc_lport *lport, u8 *new) |
| 712 | { |
| 713 | struct fnic *fnic = lport_priv(lport); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 714 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 715 | spin_lock_irq(&fnic->fnic_lock); |
| 716 | fnic_update_mac_locked(fnic, new); |
| 717 | spin_unlock_irq(&fnic->fnic_lock); |
| 718 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 719 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 720 | /** |
| 721 | * fnic_set_port_id() - set the port_ID after successful FLOGI. |
| 722 | * @lport: local port. |
| 723 | * @port_id: assigned FC_ID. |
| 724 | * @fp: received frame containing the FLOGI accept or NULL. |
| 725 | * |
| 726 | * This is called from libfc when a new FC_ID has been assigned. |
| 727 | * This causes us to reset the firmware to FC_MODE and setup the new MAC |
| 728 | * address and FC_ID. |
| 729 | * |
| 730 | * It is also called with FC_ID 0 when we're logged off. |
| 731 | * |
| 732 | * If the FC_ID is due to point-to-point, fp may be NULL. |
| 733 | */ |
| 734 | void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp) |
| 735 | { |
| 736 | struct fnic *fnic = lport_priv(lport); |
| 737 | u8 *mac; |
| 738 | int ret; |
| 739 | |
| 740 | FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n", |
| 741 | port_id, fp); |
| 742 | |
| 743 | /* |
| 744 | * If we're clearing the FC_ID, change to use the ctl_src_addr. |
| 745 | * Set ethernet mode to send FLOGI. |
| 746 | */ |
| 747 | if (!port_id) { |
| 748 | fnic_update_mac(lport, fnic->ctlr.ctl_src_addr); |
| 749 | fnic_set_eth_mode(fnic); |
| 750 | return; |
| 751 | } |
| 752 | |
| 753 | if (fp) { |
| 754 | mac = fr_cb(fp)->granted_mac; |
| 755 | if (is_zero_ether_addr(mac)) { |
| 756 | /* non-FIP - FLOGI already accepted - ignore return */ |
| 757 | fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 758 | } |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 759 | fnic_update_mac(lport, mac); |
| 760 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 761 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 762 | /* Change state to reflect transition to FC mode */ |
| 763 | spin_lock_irq(&fnic->fnic_lock); |
| 764 | 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] | 765 | fnic->state = FNIC_IN_ETH_TRANS_FC_MODE; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 766 | else { |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 767 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 768 | "Unexpected fnic state %s while" |
| 769 | " processing flogi resp\n", |
| 770 | fnic_state_to_str(fnic->state)); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 771 | spin_unlock_irq(&fnic->fnic_lock); |
| 772 | return; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 773 | } |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 774 | spin_unlock_irq(&fnic->fnic_lock); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 775 | |
| 776 | /* |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 777 | * Send FLOGI registration to firmware to set up FC mode. |
| 778 | * The new address will be set up when registration completes. |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 779 | */ |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 780 | ret = fnic_flogi_reg_handler(fnic, port_id); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 781 | |
| 782 | if (ret < 0) { |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 783 | spin_lock_irq(&fnic->fnic_lock); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 784 | if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) |
| 785 | fnic->state = FNIC_IN_ETH_MODE; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 786 | spin_unlock_irq(&fnic->fnic_lock); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 787 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 788 | } |
| 789 | |
| 790 | static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc |
| 791 | *cq_desc, struct vnic_rq_buf *buf, |
| 792 | int skipped __attribute__((unused)), |
| 793 | void *opaque) |
| 794 | { |
| 795 | struct fnic *fnic = vnic_dev_priv(rq->vdev); |
| 796 | struct sk_buff *skb; |
| 797 | struct fc_frame *fp; |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 798 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 799 | unsigned int eth_hdrs_stripped; |
| 800 | u8 type, color, eop, sop, ingress_port, vlan_stripped; |
| 801 | u8 fcoe = 0, fcoe_sof, fcoe_eof; |
| 802 | u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0; |
| 803 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; |
| 804 | u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc; |
| 805 | u8 fcs_ok = 1, packet_error = 0; |
| 806 | u16 q_number, completed_index, bytes_written = 0, vlan, checksum; |
| 807 | u32 rss_hash; |
| 808 | u16 exchange_id, tmpl; |
| 809 | u8 sof = 0; |
| 810 | u8 eof = 0; |
| 811 | u32 fcp_bytes_written = 0; |
| 812 | unsigned long flags; |
| 813 | |
| 814 | pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, |
| 815 | PCI_DMA_FROMDEVICE); |
| 816 | skb = buf->os_buf; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 817 | fp = (struct fc_frame *)skb; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 818 | buf->os_buf = NULL; |
| 819 | |
| 820 | cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index); |
| 821 | if (type == CQ_DESC_TYPE_RQ_FCP) { |
| 822 | cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc, |
| 823 | &type, &color, &q_number, &completed_index, |
| 824 | &eop, &sop, &fcoe_fc_crc_ok, &exchange_id, |
| 825 | &tmpl, &fcp_bytes_written, &sof, &eof, |
| 826 | &ingress_port, &packet_error, |
| 827 | &fcoe_enc_error, &fcs_ok, &vlan_stripped, |
| 828 | &vlan); |
| 829 | eth_hdrs_stripped = 1; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 830 | skb_trim(skb, fcp_bytes_written); |
| 831 | fr_sof(fp) = sof; |
| 832 | fr_eof(fp) = eof; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 833 | |
| 834 | } else if (type == CQ_DESC_TYPE_RQ_ENET) { |
| 835 | cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, |
| 836 | &type, &color, &q_number, &completed_index, |
| 837 | &ingress_port, &fcoe, &eop, &sop, |
| 838 | &rss_type, &csum_not_calc, &rss_hash, |
| 839 | &bytes_written, &packet_error, |
| 840 | &vlan_stripped, &vlan, &checksum, |
| 841 | &fcoe_sof, &fcoe_fc_crc_ok, |
| 842 | &fcoe_enc_error, &fcoe_eof, |
| 843 | &tcp_udp_csum_ok, &udp, &tcp, |
| 844 | &ipv4_csum_ok, &ipv6, &ipv4, |
| 845 | &ipv4_fragment, &fcs_ok); |
| 846 | eth_hdrs_stripped = 0; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 847 | skb_trim(skb, bytes_written); |
| 848 | if (!fcs_ok) { |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 849 | atomic64_inc(&fnic_stats->misc_stats.frame_errors); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 850 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 851 | "fcs error. dropping packet.\n"); |
| 852 | goto drop; |
| 853 | } |
| 854 | if (fnic_import_rq_eth_pkt(fnic, skb)) |
| 855 | return; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 856 | |
| 857 | } else { |
| 858 | /* wrong CQ type*/ |
| 859 | shost_printk(KERN_ERR, fnic->lport->host, |
| 860 | "fnic rq_cmpl wrong cq type x%x\n", type); |
| 861 | goto drop; |
| 862 | } |
| 863 | |
| 864 | if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) { |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 865 | atomic64_inc(&fnic_stats->misc_stats.frame_errors); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 866 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 867 | "fnic rq_cmpl fcoe x%x fcsok x%x" |
| 868 | " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err" |
| 869 | " x%x\n", |
| 870 | fcoe, fcs_ok, packet_error, |
| 871 | fcoe_fc_crc_ok, fcoe_enc_error); |
| 872 | goto drop; |
| 873 | } |
| 874 | |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 875 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 876 | if (fnic->stop_rx_link_events) { |
| 877 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 878 | goto drop; |
| 879 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 880 | fr_dev(fp) = fnic->lport; |
| 881 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 882 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV, |
| 883 | (char *)skb->data, skb->len)) != 0) { |
| 884 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
| 885 | } |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 886 | |
| 887 | skb_queue_tail(&fnic->frame_queue, skb); |
| 888 | queue_work(fnic_event_queue, &fnic->frame_work); |
| 889 | |
| 890 | return; |
| 891 | drop: |
| 892 | dev_kfree_skb_irq(skb); |
| 893 | } |
| 894 | |
| 895 | static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev, |
| 896 | struct cq_desc *cq_desc, u8 type, |
| 897 | u16 q_number, u16 completed_index, |
| 898 | void *opaque) |
| 899 | { |
| 900 | struct fnic *fnic = vnic_dev_priv(vdev); |
| 901 | |
| 902 | vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index, |
| 903 | VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv, |
| 904 | NULL); |
| 905 | return 0; |
| 906 | } |
| 907 | |
| 908 | int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do) |
| 909 | { |
| 910 | unsigned int tot_rq_work_done = 0, cur_work_done; |
| 911 | unsigned int i; |
| 912 | int err; |
| 913 | |
| 914 | for (i = 0; i < fnic->rq_count; i++) { |
| 915 | cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do, |
| 916 | fnic_rq_cmpl_handler_cont, |
| 917 | NULL); |
| 918 | if (cur_work_done) { |
| 919 | err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); |
| 920 | if (err) |
| 921 | shost_printk(KERN_ERR, fnic->lport->host, |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 922 | "fnic_alloc_rq_frame can't alloc" |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 923 | " frame\n"); |
| 924 | } |
| 925 | tot_rq_work_done += cur_work_done; |
| 926 | } |
| 927 | |
| 928 | return tot_rq_work_done; |
| 929 | } |
| 930 | |
| 931 | /* |
| 932 | * This function is called once at init time to allocate and fill RQ |
| 933 | * buffers. Subsequently, it is called in the interrupt context after RQ |
| 934 | * buffer processing to replenish the buffers in the RQ |
| 935 | */ |
| 936 | int fnic_alloc_rq_frame(struct vnic_rq *rq) |
| 937 | { |
| 938 | struct fnic *fnic = vnic_dev_priv(rq->vdev); |
| 939 | struct sk_buff *skb; |
| 940 | u16 len; |
| 941 | dma_addr_t pa; |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 942 | int r; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 943 | |
| 944 | len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM; |
| 945 | skb = dev_alloc_skb(len); |
| 946 | if (!skb) { |
| 947 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 948 | "Unable to allocate RQ sk_buff\n"); |
| 949 | return -ENOMEM; |
| 950 | } |
| 951 | skb_reset_mac_header(skb); |
| 952 | skb_reset_transport_header(skb); |
| 953 | skb_reset_network_header(skb); |
| 954 | skb_put(skb, len); |
| 955 | pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE); |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 956 | |
Dan Carpenter | dd7328e | 2016-07-07 11:23:59 +0300 | [diff] [blame] | 957 | if (pci_dma_mapping_error(fnic->pdev, pa)) { |
| 958 | r = -ENOMEM; |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 959 | printk(KERN_ERR "PCI mapping failed with error %d\n", r); |
| 960 | goto free_skb; |
| 961 | } |
| 962 | |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 963 | fnic_queue_rq_desc(rq, skb, pa, len); |
| 964 | return 0; |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 965 | |
| 966 | free_skb: |
| 967 | kfree_skb(skb); |
| 968 | return r; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 969 | } |
| 970 | |
| 971 | void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) |
| 972 | { |
| 973 | struct fc_frame *fp = buf->os_buf; |
| 974 | struct fnic *fnic = vnic_dev_priv(rq->vdev); |
| 975 | |
| 976 | pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, |
| 977 | PCI_DMA_FROMDEVICE); |
| 978 | |
| 979 | dev_kfree_skb(fp_skb(fp)); |
| 980 | buf->os_buf = NULL; |
| 981 | } |
| 982 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 983 | /** |
| 984 | * fnic_eth_send() - Send Ethernet frame. |
| 985 | * @fip: fcoe_ctlr instance. |
| 986 | * @skb: Ethernet Frame, FIP, without VLAN encapsulation. |
| 987 | */ |
| 988 | void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 989 | { |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 990 | struct fnic *fnic = fnic_from_ctlr(fip); |
| 991 | struct vnic_wq *wq = &fnic->wq[0]; |
| 992 | dma_addr_t pa; |
| 993 | struct ethhdr *eth_hdr; |
| 994 | struct vlan_ethhdr *vlan_hdr; |
| 995 | unsigned long flags; |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 996 | int r; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 997 | |
| 998 | if (!fnic->vlan_hw_insert) { |
| 999 | eth_hdr = (struct ethhdr *)skb_mac_header(skb); |
| 1000 | vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, |
| 1001 | sizeof(*vlan_hdr) - sizeof(*eth_hdr)); |
| 1002 | memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN); |
| 1003 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); |
| 1004 | vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto; |
| 1005 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 1006 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, |
| 1007 | FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) { |
| 1008 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
| 1009 | } |
| 1010 | } else { |
| 1011 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, |
| 1012 | FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) { |
| 1013 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
| 1014 | } |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1015 | } |
| 1016 | |
| 1017 | pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); |
| 1018 | |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 1019 | r = pci_dma_mapping_error(fnic->pdev, pa); |
| 1020 | if (r) { |
| 1021 | printk(KERN_ERR "PCI mapping failed with error %d\n", r); |
| 1022 | goto free_skb; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1023 | } |
| 1024 | |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 1025 | spin_lock_irqsave(&fnic->wq_lock[0], flags); |
| 1026 | if (!vnic_wq_desc_avail(wq)) |
| 1027 | goto irq_restore; |
| 1028 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1029 | fnic_queue_wq_eth_desc(wq, skb, pa, skb->len, |
Hiral Patel | c0773b7 | 2012-12-10 01:21:30 -0800 | [diff] [blame] | 1030 | 0 /* hw inserts cos value */, |
| 1031 | fnic->vlan_id, 1); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1032 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 1033 | return; |
| 1034 | |
| 1035 | irq_restore: |
| 1036 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
| 1037 | pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE); |
| 1038 | free_skb: |
| 1039 | kfree_skb(skb); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1040 | } |
| 1041 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1042 | /* |
| 1043 | * Send FC frame. |
| 1044 | */ |
| 1045 | static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1046 | { |
| 1047 | struct vnic_wq *wq = &fnic->wq[0]; |
| 1048 | struct sk_buff *skb; |
| 1049 | dma_addr_t pa; |
| 1050 | struct ethhdr *eth_hdr; |
| 1051 | struct vlan_ethhdr *vlan_hdr; |
| 1052 | struct fcoe_hdr *fcoe_hdr; |
| 1053 | struct fc_frame_header *fh; |
| 1054 | u32 tot_len, eth_hdr_len; |
| 1055 | int ret = 0; |
| 1056 | unsigned long flags; |
| 1057 | |
| 1058 | fh = fc_frame_header_get(fp); |
| 1059 | skb = fp_skb(fp); |
| 1060 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1061 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
| 1062 | fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb)) |
| 1063 | return 0; |
| 1064 | |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1065 | if (!fnic->vlan_hw_insert) { |
| 1066 | eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr); |
| 1067 | vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len); |
| 1068 | eth_hdr = (struct ethhdr *)vlan_hdr; |
| 1069 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); |
| 1070 | vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE); |
| 1071 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); |
| 1072 | fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1); |
| 1073 | } else { |
| 1074 | eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr); |
| 1075 | eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len); |
| 1076 | eth_hdr->h_proto = htons(ETH_P_FCOE); |
| 1077 | fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1); |
| 1078 | } |
| 1079 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1080 | if (fnic->ctlr.map_dest) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1081 | fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1082 | else |
| 1083 | memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN); |
| 1084 | memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1085 | |
| 1086 | tot_len = skb->len; |
| 1087 | BUG_ON(tot_len % 4); |
| 1088 | |
| 1089 | memset(fcoe_hdr, 0, sizeof(*fcoe_hdr)); |
| 1090 | fcoe_hdr->fcoe_sof = fr_sof(fp); |
| 1091 | if (FC_FCOE_VER) |
| 1092 | FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER); |
| 1093 | |
| 1094 | pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE); |
| 1095 | |
Dan Carpenter | dd7328e | 2016-07-07 11:23:59 +0300 | [diff] [blame] | 1096 | if (pci_dma_mapping_error(fnic->pdev, pa)) { |
| 1097 | ret = -ENOMEM; |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 1098 | printk(KERN_ERR "DMA map failed with error %d\n", ret); |
| 1099 | goto free_skb_on_err; |
| 1100 | } |
| 1101 | |
Hiral Shah | abb1414 | 2014-04-18 12:28:19 -0700 | [diff] [blame] | 1102 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND, |
| 1103 | (char *)eth_hdr, tot_len)) != 0) { |
| 1104 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); |
| 1105 | } |
| 1106 | |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1107 | spin_lock_irqsave(&fnic->wq_lock[0], flags); |
| 1108 | |
| 1109 | if (!vnic_wq_desc_avail(wq)) { |
| 1110 | pci_unmap_single(fnic->pdev, pa, |
| 1111 | tot_len, PCI_DMA_TODEVICE); |
| 1112 | ret = -1; |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 1113 | goto irq_restore; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1114 | } |
| 1115 | |
| 1116 | fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp), |
Hiral Patel | c0773b7 | 2012-12-10 01:21:30 -0800 | [diff] [blame] | 1117 | 0 /* hw inserts cos value */, |
| 1118 | fnic->vlan_id, 1, 1, 1); |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 1119 | |
| 1120 | irq_restore: |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1121 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
| 1122 | |
Maurizio Lombardi | fd6ddfa | 2015-08-12 17:00:23 +0200 | [diff] [blame] | 1123 | free_skb_on_err: |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1124 | if (ret) |
| 1125 | dev_kfree_skb_any(fp_skb(fp)); |
| 1126 | |
| 1127 | return ret; |
| 1128 | } |
| 1129 | |
| 1130 | /* |
| 1131 | * fnic_send |
| 1132 | * Routine to send a raw frame |
| 1133 | */ |
| 1134 | int fnic_send(struct fc_lport *lp, struct fc_frame *fp) |
| 1135 | { |
| 1136 | struct fnic *fnic = lport_priv(lp); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1137 | unsigned long flags; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1138 | |
| 1139 | if (fnic->in_remove) { |
| 1140 | dev_kfree_skb(fp_skb(fp)); |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1141 | return -1; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1142 | } |
| 1143 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1144 | /* |
| 1145 | * Queue frame if in a transitional state. |
| 1146 | * This occurs while registering the Port_ID / MAC address after FLOGI. |
| 1147 | */ |
| 1148 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 1149 | if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) { |
| 1150 | skb_queue_tail(&fnic->tx_queue, fp_skb(fp)); |
| 1151 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 1152 | return 0; |
| 1153 | } |
| 1154 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1155 | |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1156 | return fnic_send_frame(fnic, fp); |
| 1157 | } |
| 1158 | |
| 1159 | /** |
| 1160 | * fnic_flush_tx() - send queued frames. |
| 1161 | * @fnic: fnic device |
| 1162 | * |
| 1163 | * Send frames that were waiting to go out in FC or Ethernet mode. |
| 1164 | * Whenever changing modes we purge queued frames, so these frames should |
| 1165 | * be queued for the stable mode that we're in, either FC or Ethernet. |
| 1166 | * |
| 1167 | * Called without fnic_lock held. |
| 1168 | */ |
| 1169 | void fnic_flush_tx(struct fnic *fnic) |
| 1170 | { |
| 1171 | struct sk_buff *skb; |
| 1172 | struct fc_frame *fp; |
| 1173 | |
Brian Uchino | d9e9ab5 | 2010-04-09 14:22:49 -0700 | [diff] [blame] | 1174 | while ((skb = skb_dequeue(&fnic->tx_queue))) { |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1175 | fp = (struct fc_frame *)skb; |
| 1176 | fnic_send_frame(fnic, fp); |
| 1177 | } |
| 1178 | } |
| 1179 | |
| 1180 | /** |
| 1181 | * fnic_set_eth_mode() - put fnic into ethernet mode. |
| 1182 | * @fnic: fnic device |
| 1183 | * |
| 1184 | * Called without fnic lock held. |
| 1185 | */ |
| 1186 | static void fnic_set_eth_mode(struct fnic *fnic) |
| 1187 | { |
| 1188 | unsigned long flags; |
| 1189 | enum fnic_state old_state; |
| 1190 | int ret; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1191 | |
| 1192 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 1193 | again: |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1194 | old_state = fnic->state; |
| 1195 | switch (old_state) { |
| 1196 | case FNIC_IN_FC_MODE: |
| 1197 | case FNIC_IN_ETH_TRANS_FC_MODE: |
| 1198 | default: |
| 1199 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1200 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 1201 | |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1202 | ret = fnic_fw_reset_handler(fnic); |
| 1203 | |
| 1204 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 1205 | if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE) |
| 1206 | goto again; |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1207 | if (ret) |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1208 | fnic->state = old_state; |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1209 | break; |
| 1210 | |
| 1211 | case FNIC_IN_FC_TRANS_ETH_MODE: |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1212 | case FNIC_IN_ETH_MODE: |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1213 | break; |
| 1214 | } |
Joe Eykholt | 78112e5 | 2009-11-03 11:49:22 -0800 | [diff] [blame] | 1215 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1216 | } |
| 1217 | |
| 1218 | static void fnic_wq_complete_frame_send(struct vnic_wq *wq, |
| 1219 | struct cq_desc *cq_desc, |
| 1220 | struct vnic_wq_buf *buf, void *opaque) |
| 1221 | { |
| 1222 | struct sk_buff *skb = buf->os_buf; |
| 1223 | struct fc_frame *fp = (struct fc_frame *)skb; |
| 1224 | struct fnic *fnic = vnic_dev_priv(wq->vdev); |
| 1225 | |
| 1226 | pci_unmap_single(fnic->pdev, buf->dma_addr, |
| 1227 | buf->len, PCI_DMA_TODEVICE); |
| 1228 | dev_kfree_skb_irq(fp_skb(fp)); |
| 1229 | buf->os_buf = NULL; |
| 1230 | } |
| 1231 | |
| 1232 | static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev, |
| 1233 | struct cq_desc *cq_desc, u8 type, |
| 1234 | u16 q_number, u16 completed_index, |
| 1235 | void *opaque) |
| 1236 | { |
| 1237 | struct fnic *fnic = vnic_dev_priv(vdev); |
| 1238 | unsigned long flags; |
| 1239 | |
| 1240 | spin_lock_irqsave(&fnic->wq_lock[q_number], flags); |
| 1241 | vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index, |
| 1242 | fnic_wq_complete_frame_send, NULL); |
| 1243 | spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags); |
| 1244 | |
| 1245 | return 0; |
| 1246 | } |
| 1247 | |
| 1248 | int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do) |
| 1249 | { |
| 1250 | unsigned int wq_work_done = 0; |
| 1251 | unsigned int i; |
| 1252 | |
| 1253 | for (i = 0; i < fnic->raw_wq_count; i++) { |
| 1254 | wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i], |
| 1255 | work_to_do, |
| 1256 | fnic_wq_cmpl_handler_cont, |
| 1257 | NULL); |
| 1258 | } |
| 1259 | |
| 1260 | return wq_work_done; |
| 1261 | } |
| 1262 | |
| 1263 | |
| 1264 | void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) |
| 1265 | { |
| 1266 | struct fc_frame *fp = buf->os_buf; |
| 1267 | struct fnic *fnic = vnic_dev_priv(wq->vdev); |
| 1268 | |
| 1269 | pci_unmap_single(fnic->pdev, buf->dma_addr, |
| 1270 | buf->len, PCI_DMA_TODEVICE); |
| 1271 | |
| 1272 | dev_kfree_skb(fp_skb(fp)); |
| 1273 | buf->os_buf = NULL; |
| 1274 | } |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 1275 | |
| 1276 | void fnic_fcoe_reset_vlans(struct fnic *fnic) |
| 1277 | { |
| 1278 | unsigned long flags; |
| 1279 | struct fcoe_vlan *vlan; |
| 1280 | struct fcoe_vlan *next; |
| 1281 | |
| 1282 | /* |
| 1283 | * indicate a link down to fcoe so that all fcf's are free'd |
| 1284 | * might not be required since we did this before sending vlan |
| 1285 | * discovery request |
| 1286 | */ |
| 1287 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 1288 | if (!list_empty(&fnic->vlans)) { |
| 1289 | list_for_each_entry_safe(vlan, next, &fnic->vlans, list) { |
| 1290 | list_del(&vlan->list); |
| 1291 | kfree(vlan); |
| 1292 | } |
| 1293 | } |
| 1294 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 1295 | } |
| 1296 | |
| 1297 | void fnic_handle_fip_timer(struct fnic *fnic) |
| 1298 | { |
| 1299 | unsigned long flags; |
| 1300 | struct fcoe_vlan *vlan; |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 1301 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 1302 | u64 sol_time; |
| 1303 | |
| 1304 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
| 1305 | if (fnic->stop_rx_link_events) { |
| 1306 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 1307 | return; |
| 1308 | } |
| 1309 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
| 1310 | |
Hannes Reinecke | 1917d42 | 2016-07-04 10:29:19 +0200 | [diff] [blame] | 1311 | if (fnic->ctlr.mode == FIP_MODE_NON_FIP) |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 1312 | return; |
| 1313 | |
| 1314 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
| 1315 | if (list_empty(&fnic->vlans)) { |
| 1316 | /* no vlans available, try again */ |
| 1317 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 1318 | "Start VLAN Discovery\n"); |
| 1319 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 1320 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
| 1321 | return; |
| 1322 | } |
| 1323 | |
| 1324 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
| 1325 | shost_printk(KERN_DEBUG, fnic->lport->host, |
| 1326 | "fip_timer: vlan %d state %d sol_count %d\n", |
| 1327 | vlan->vid, vlan->state, vlan->sol_count); |
| 1328 | switch (vlan->state) { |
| 1329 | case FIP_VLAN_USED: |
| 1330 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 1331 | "FIP VLAN is selected for FC transaction\n"); |
| 1332 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 1333 | break; |
| 1334 | case FIP_VLAN_FAILED: |
| 1335 | /* if all vlans are in failed state, restart vlan disc */ |
| 1336 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
| 1337 | "Start VLAN Discovery\n"); |
| 1338 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
| 1339 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
| 1340 | break; |
| 1341 | case FIP_VLAN_SENT: |
| 1342 | if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) { |
| 1343 | /* |
| 1344 | * no response on this vlan, remove from the list. |
| 1345 | * Try the next vlan |
| 1346 | */ |
| 1347 | shost_printk(KERN_INFO, fnic->lport->host, |
| 1348 | "Dequeue this VLAN ID %d from list\n", |
| 1349 | vlan->vid); |
| 1350 | list_del(&vlan->list); |
| 1351 | kfree(vlan); |
| 1352 | vlan = NULL; |
| 1353 | if (list_empty(&fnic->vlans)) { |
| 1354 | /* we exhausted all vlans, restart vlan disc */ |
| 1355 | spin_unlock_irqrestore(&fnic->vlans_lock, |
| 1356 | flags); |
| 1357 | shost_printk(KERN_INFO, fnic->lport->host, |
| 1358 | "fip_timer: vlan list empty, " |
| 1359 | "trigger vlan disc\n"); |
| 1360 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); |
| 1361 | return; |
| 1362 | } |
| 1363 | /* check the next vlan */ |
| 1364 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, |
| 1365 | list); |
| 1366 | fnic->set_vlan(fnic, vlan->vid); |
| 1367 | vlan->state = FIP_VLAN_SENT; /* sent now */ |
| 1368 | } |
| 1369 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); |
Hiral Patel | 67125b0 | 2013-09-12 17:45:42 -0700 | [diff] [blame] | 1370 | atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count); |
Hiral Patel | d3c995f | 2013-02-25 16:18:36 -0800 | [diff] [blame] | 1371 | vlan->sol_count++; |
| 1372 | sol_time = jiffies + msecs_to_jiffies |
| 1373 | (FCOE_CTLR_START_DELAY); |
| 1374 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); |
| 1375 | break; |
| 1376 | } |
| 1377 | } |