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fnic_fcs.c
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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>
20 #include <linux/slab.h>
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>
27 #include <scsi/fc/fc_fip.h>
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"
34 #include "cq_enet_desc.h"
35 #include "cq_exch_desc.h"
36 
38 
39 static void fnic_set_eth_mode(struct fnic *);
40 
42 {
43  struct fnic *fnic = container_of(work, struct fnic, link_work);
44  unsigned long flags;
45  int old_link_status;
46  u32 old_link_down_cnt;
47 
48  spin_lock_irqsave(&fnic->fnic_lock, flags);
49 
50  if (fnic->stop_rx_link_events) {
51  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
52  return;
53  }
54 
55  old_link_down_cnt = fnic->link_down_cnt;
56  old_link_status = fnic->link_status;
57  fnic->link_status = vnic_dev_link_status(fnic->vdev);
59 
60  if (old_link_status == fnic->link_status) {
61  if (!fnic->link_status)
62  /* DOWN -> DOWN */
63  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
64  else {
65  if (old_link_down_cnt != fnic->link_down_cnt) {
66  /* UP -> DOWN -> UP */
67  fnic->lport->host_stats.link_failure_count++;
68  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
69  FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
70  "link down\n");
71  fcoe_ctlr_link_down(&fnic->ctlr);
72  FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
73  "link up\n");
74  fcoe_ctlr_link_up(&fnic->ctlr);
75  } else
76  /* UP -> UP */
77  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
78  }
79  } else if (fnic->link_status) {
80  /* DOWN -> UP */
81  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
82  FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
83  fcoe_ctlr_link_up(&fnic->ctlr);
84  } else {
85  /* UP -> DOWN */
86  fnic->lport->host_stats.link_failure_count++;
87  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
88  FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
89  fcoe_ctlr_link_down(&fnic->ctlr);
90  }
91 
92 }
93 
94 /*
95  * This function passes incoming fabric frames to libFC
96  */
98 {
99  struct fnic *fnic = container_of(work, struct fnic, frame_work);
100  struct fc_lport *lp = fnic->lport;
101  unsigned long flags;
102  struct sk_buff *skb;
103  struct fc_frame *fp;
104 
105  while ((skb = skb_dequeue(&fnic->frame_queue))) {
106 
107  spin_lock_irqsave(&fnic->fnic_lock, flags);
108  if (fnic->stop_rx_link_events) {
109  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
110  dev_kfree_skb(skb);
111  return;
112  }
113  fp = (struct fc_frame *)skb;
114 
115  /*
116  * If we're in a transitional state, just re-queue and return.
117  * The queue will be serviced when we get to a stable state.
118  */
119  if (fnic->state != FNIC_IN_FC_MODE &&
120  fnic->state != FNIC_IN_ETH_MODE) {
121  skb_queue_head(&fnic->frame_queue, skb);
122  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
123  return;
124  }
125  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
126 
127  fc_exch_recv(lp, fp);
128  }
129 }
130 
136 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
137 {
138  struct fc_frame *fp;
139  struct ethhdr *eh;
140  struct fcoe_hdr *fcoe_hdr;
141  struct fcoe_crc_eof *ft;
142 
143  /*
144  * Undo VLAN encapsulation if present.
145  */
146  eh = (struct ethhdr *)skb->data;
147  if (eh->h_proto == htons(ETH_P_8021Q)) {
148  memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
149  eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
150  skb_reset_mac_header(skb);
151  }
152  if (eh->h_proto == htons(ETH_P_FIP)) {
153  skb_pull(skb, sizeof(*eh));
154  fcoe_ctlr_recv(&fnic->ctlr, skb);
155  return 1; /* let caller know packet was used */
156  }
157  if (eh->h_proto != htons(ETH_P_FCOE))
158  goto drop;
159  skb_set_network_header(skb, sizeof(*eh));
160  skb_pull(skb, sizeof(*eh));
161 
162  fcoe_hdr = (struct fcoe_hdr *)skb->data;
163  if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
164  goto drop;
165 
166  fp = (struct fc_frame *)skb;
167  fc_frame_init(fp);
168  fr_sof(fp) = fcoe_hdr->fcoe_sof;
169  skb_pull(skb, sizeof(struct fcoe_hdr));
170  skb_reset_transport_header(skb);
171 
172  ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
173  fr_eof(fp) = ft->fcoe_eof;
174  skb_trim(skb, skb->len - sizeof(*ft));
175  return 0;
176 drop:
177  dev_kfree_skb_irq(skb);
178  return -1;
179 }
180 
188 void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
189 {
190  u8 *ctl = fnic->ctlr.ctl_src_addr;
191  u8 *data = fnic->data_src_addr;
192 
193  if (is_zero_ether_addr(new))
194  new = ctl;
195  if (!compare_ether_addr(data, new))
196  return;
197  FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
198  if (!is_zero_ether_addr(data) && compare_ether_addr(data, ctl))
199  vnic_dev_del_addr(fnic->vdev, data);
200  memcpy(data, new, ETH_ALEN);
201  if (compare_ether_addr(new, ctl))
202  vnic_dev_add_addr(fnic->vdev, new);
203 }
204 
210 void fnic_update_mac(struct fc_lport *lport, u8 *new)
211 {
212  struct fnic *fnic = lport_priv(lport);
213 
214  spin_lock_irq(&fnic->fnic_lock);
215  fnic_update_mac_locked(fnic, new);
216  spin_unlock_irq(&fnic->fnic_lock);
217 }
218 
233 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
234 {
235  struct fnic *fnic = lport_priv(lport);
236  u8 *mac;
237  int ret;
238 
239  FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
240  port_id, fp);
241 
242  /*
243  * If we're clearing the FC_ID, change to use the ctl_src_addr.
244  * Set ethernet mode to send FLOGI.
245  */
246  if (!port_id) {
247  fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
248  fnic_set_eth_mode(fnic);
249  return;
250  }
251 
252  if (fp) {
253  mac = fr_cb(fp)->granted_mac;
254  if (is_zero_ether_addr(mac)) {
255  /* non-FIP - FLOGI already accepted - ignore return */
256  fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
257  }
258  fnic_update_mac(lport, mac);
259  }
260 
261  /* Change state to reflect transition to FC mode */
262  spin_lock_irq(&fnic->fnic_lock);
263  if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
265  else {
266  FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
267  "Unexpected fnic state %s while"
268  " processing flogi resp\n",
269  fnic_state_to_str(fnic->state));
270  spin_unlock_irq(&fnic->fnic_lock);
271  return;
272  }
273  spin_unlock_irq(&fnic->fnic_lock);
274 
275  /*
276  * Send FLOGI registration to firmware to set up FC mode.
277  * The new address will be set up when registration completes.
278  */
279  ret = fnic_flogi_reg_handler(fnic, port_id);
280 
281  if (ret < 0) {
282  spin_lock_irq(&fnic->fnic_lock);
283  if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
284  fnic->state = FNIC_IN_ETH_MODE;
285  spin_unlock_irq(&fnic->fnic_lock);
286  }
287 }
288 
289 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
290  *cq_desc, struct vnic_rq_buf *buf,
291  int skipped __attribute__((unused)),
292  void *opaque)
293 {
294  struct fnic *fnic = vnic_dev_priv(rq->vdev);
295  struct sk_buff *skb;
296  struct fc_frame *fp;
297  unsigned int eth_hdrs_stripped;
298  u8 type, color, eop, sop, ingress_port, vlan_stripped;
299  u8 fcoe = 0, fcoe_sof, fcoe_eof;
300  u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
301  u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
302  u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
303  u8 fcs_ok = 1, packet_error = 0;
304  u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
305  u32 rss_hash;
306  u16 exchange_id, tmpl;
307  u8 sof = 0;
308  u8 eof = 0;
309  u32 fcp_bytes_written = 0;
310  unsigned long flags;
311 
312  pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
314  skb = buf->os_buf;
315  fp = (struct fc_frame *)skb;
316  buf->os_buf = NULL;
317 
318  cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
319  if (type == CQ_DESC_TYPE_RQ_FCP) {
320  cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
321  &type, &color, &q_number, &completed_index,
322  &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
323  &tmpl, &fcp_bytes_written, &sof, &eof,
324  &ingress_port, &packet_error,
325  &fcoe_enc_error, &fcs_ok, &vlan_stripped,
326  &vlan);
327  eth_hdrs_stripped = 1;
328  skb_trim(skb, fcp_bytes_written);
329  fr_sof(fp) = sof;
330  fr_eof(fp) = eof;
331 
332  } else if (type == CQ_DESC_TYPE_RQ_ENET) {
333  cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
334  &type, &color, &q_number, &completed_index,
335  &ingress_port, &fcoe, &eop, &sop,
336  &rss_type, &csum_not_calc, &rss_hash,
337  &bytes_written, &packet_error,
338  &vlan_stripped, &vlan, &checksum,
339  &fcoe_sof, &fcoe_fc_crc_ok,
340  &fcoe_enc_error, &fcoe_eof,
341  &tcp_udp_csum_ok, &udp, &tcp,
342  &ipv4_csum_ok, &ipv6, &ipv4,
343  &ipv4_fragment, &fcs_ok);
344  eth_hdrs_stripped = 0;
345  skb_trim(skb, bytes_written);
346  if (!fcs_ok) {
347  FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
348  "fcs error. dropping packet.\n");
349  goto drop;
350  }
351  if (fnic_import_rq_eth_pkt(fnic, skb))
352  return;
353 
354  } else {
355  /* wrong CQ type*/
356  shost_printk(KERN_ERR, fnic->lport->host,
357  "fnic rq_cmpl wrong cq type x%x\n", type);
358  goto drop;
359  }
360 
361  if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
362  FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
363  "fnic rq_cmpl fcoe x%x fcsok x%x"
364  " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
365  " x%x\n",
366  fcoe, fcs_ok, packet_error,
367  fcoe_fc_crc_ok, fcoe_enc_error);
368  goto drop;
369  }
370 
371  spin_lock_irqsave(&fnic->fnic_lock, flags);
372  if (fnic->stop_rx_link_events) {
373  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
374  goto drop;
375  }
376  fr_dev(fp) = fnic->lport;
377  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
378 
379  skb_queue_tail(&fnic->frame_queue, skb);
380  queue_work(fnic_event_queue, &fnic->frame_work);
381 
382  return;
383 drop:
384  dev_kfree_skb_irq(skb);
385 }
386 
387 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
388  struct cq_desc *cq_desc, u8 type,
389  u16 q_number, u16 completed_index,
390  void *opaque)
391 {
392  struct fnic *fnic = vnic_dev_priv(vdev);
393 
394  vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
395  VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
396  NULL);
397  return 0;
398 }
399 
400 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
401 {
402  unsigned int tot_rq_work_done = 0, cur_work_done;
403  unsigned int i;
404  int err;
405 
406  for (i = 0; i < fnic->rq_count; i++) {
407  cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
408  fnic_rq_cmpl_handler_cont,
409  NULL);
410  if (cur_work_done) {
411  err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
412  if (err)
413  shost_printk(KERN_ERR, fnic->lport->host,
414  "fnic_alloc_rq_frame can't alloc"
415  " frame\n");
416  }
417  tot_rq_work_done += cur_work_done;
418  }
419 
420  return tot_rq_work_done;
421 }
422 
423 /*
424  * This function is called once at init time to allocate and fill RQ
425  * buffers. Subsequently, it is called in the interrupt context after RQ
426  * buffer processing to replenish the buffers in the RQ
427  */
429 {
430  struct fnic *fnic = vnic_dev_priv(rq->vdev);
431  struct sk_buff *skb;
432  u16 len;
433  dma_addr_t pa;
434 
436  skb = dev_alloc_skb(len);
437  if (!skb) {
438  FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
439  "Unable to allocate RQ sk_buff\n");
440  return -ENOMEM;
441  }
442  skb_reset_mac_header(skb);
443  skb_reset_transport_header(skb);
444  skb_reset_network_header(skb);
445  skb_put(skb, len);
446  pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
447  fnic_queue_rq_desc(rq, skb, pa, len);
448  return 0;
449 }
450 
451 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
452 {
453  struct fc_frame *fp = buf->os_buf;
454  struct fnic *fnic = vnic_dev_priv(rq->vdev);
455 
456  pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
458 
459  dev_kfree_skb(fp_skb(fp));
460  buf->os_buf = NULL;
461 }
462 
468 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
469 {
470  struct fnic *fnic = fnic_from_ctlr(fip);
471  struct vnic_wq *wq = &fnic->wq[0];
472  dma_addr_t pa;
473  struct ethhdr *eth_hdr;
474  struct vlan_ethhdr *vlan_hdr;
475  unsigned long flags;
476 
477  if (!fnic->vlan_hw_insert) {
478  eth_hdr = (struct ethhdr *)skb_mac_header(skb);
479  vlan_hdr = (struct vlan_ethhdr *)skb_push(skb,
480  sizeof(*vlan_hdr) - sizeof(*eth_hdr));
481  memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
482  vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
483  vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
484  vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
485  }
486 
487  pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
488 
489  spin_lock_irqsave(&fnic->wq_lock[0], flags);
490  if (!vnic_wq_desc_avail(wq)) {
491  pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
492  spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
493  kfree_skb(skb);
494  return;
495  }
496 
497  fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
498  fnic->vlan_hw_insert, fnic->vlan_id, 1);
499  spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
500 }
501 
502 /*
503  * Send FC frame.
504  */
505 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
506 {
507  struct vnic_wq *wq = &fnic->wq[0];
508  struct sk_buff *skb;
509  dma_addr_t pa;
510  struct ethhdr *eth_hdr;
511  struct vlan_ethhdr *vlan_hdr;
512  struct fcoe_hdr *fcoe_hdr;
513  struct fc_frame_header *fh;
514  u32 tot_len, eth_hdr_len;
515  int ret = 0;
516  unsigned long flags;
517 
518  fh = fc_frame_header_get(fp);
519  skb = fp_skb(fp);
520 
521  if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
522  fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
523  return 0;
524 
525  if (!fnic->vlan_hw_insert) {
526  eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
527  vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len);
528  eth_hdr = (struct ethhdr *)vlan_hdr;
529  vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
531  vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
532  fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
533  } else {
534  eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
535  eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len);
536  eth_hdr->h_proto = htons(ETH_P_FCOE);
537  fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
538  }
539 
540  if (fnic->ctlr.map_dest)
541  fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
542  else
543  memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
544  memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
545 
546  tot_len = skb->len;
547  BUG_ON(tot_len % 4);
548 
549  memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
550  fcoe_hdr->fcoe_sof = fr_sof(fp);
551  if (FC_FCOE_VER)
552  FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
553 
554  pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
555 
556  spin_lock_irqsave(&fnic->wq_lock[0], flags);
557 
558  if (!vnic_wq_desc_avail(wq)) {
559  pci_unmap_single(fnic->pdev, pa,
560  tot_len, PCI_DMA_TODEVICE);
561  ret = -1;
562  goto fnic_send_frame_end;
563  }
564 
565  fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
566  fnic->vlan_hw_insert, fnic->vlan_id, 1, 1, 1);
567 fnic_send_frame_end:
568  spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
569 
570  if (ret)
572 
573  return ret;
574 }
575 
576 /*
577  * fnic_send
578  * Routine to send a raw frame
579  */
580 int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
581 {
582  struct fnic *fnic = lport_priv(lp);
583  unsigned long flags;
584 
585  if (fnic->in_remove) {
586  dev_kfree_skb(fp_skb(fp));
587  return -1;
588  }
589 
590  /*
591  * Queue frame if in a transitional state.
592  * This occurs while registering the Port_ID / MAC address after FLOGI.
593  */
594  spin_lock_irqsave(&fnic->fnic_lock, flags);
595  if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
596  skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
597  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
598  return 0;
599  }
600  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
601 
602  return fnic_send_frame(fnic, fp);
603 }
604 
615 void fnic_flush_tx(struct fnic *fnic)
616 {
617  struct sk_buff *skb;
618  struct fc_frame *fp;
619 
620  while ((skb = skb_dequeue(&fnic->tx_queue))) {
621  fp = (struct fc_frame *)skb;
622  fnic_send_frame(fnic, fp);
623  }
624 }
625 
632 static void fnic_set_eth_mode(struct fnic *fnic)
633 {
634  unsigned long flags;
635  enum fnic_state old_state;
636  int ret;
637 
638  spin_lock_irqsave(&fnic->fnic_lock, flags);
639 again:
640  old_state = fnic->state;
641  switch (old_state) {
642  case FNIC_IN_FC_MODE:
644  default:
646  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
647 
648  ret = fnic_fw_reset_handler(fnic);
649 
650  spin_lock_irqsave(&fnic->fnic_lock, flags);
651  if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
652  goto again;
653  if (ret)
654  fnic->state = old_state;
655  break;
656 
658  case FNIC_IN_ETH_MODE:
659  break;
660  }
661  spin_unlock_irqrestore(&fnic->fnic_lock, flags);
662 }
663 
664 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
665  struct cq_desc *cq_desc,
666  struct vnic_wq_buf *buf, void *opaque)
667 {
668  struct sk_buff *skb = buf->os_buf;
669  struct fc_frame *fp = (struct fc_frame *)skb;
670  struct fnic *fnic = vnic_dev_priv(wq->vdev);
671 
672  pci_unmap_single(fnic->pdev, buf->dma_addr,
673  buf->len, PCI_DMA_TODEVICE);
675  buf->os_buf = NULL;
676 }
677 
678 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
679  struct cq_desc *cq_desc, u8 type,
680  u16 q_number, u16 completed_index,
681  void *opaque)
682 {
683  struct fnic *fnic = vnic_dev_priv(vdev);
684  unsigned long flags;
685 
686  spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
687  vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
688  fnic_wq_complete_frame_send, NULL);
689  spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
690 
691  return 0;
692 }
693 
694 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
695 {
696  unsigned int wq_work_done = 0;
697  unsigned int i;
698 
699  for (i = 0; i < fnic->raw_wq_count; i++) {
700  wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
701  work_to_do,
702  fnic_wq_cmpl_handler_cont,
703  NULL);
704  }
705 
706  return wq_work_done;
707 }
708 
709 
710 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
711 {
712  struct fc_frame *fp = buf->os_buf;
713  struct fnic *fnic = vnic_dev_priv(wq->vdev);
714 
715  pci_unmap_single(fnic->pdev, buf->dma_addr,
716  buf->len, PCI_DMA_TODEVICE);
717 
718  dev_kfree_skb(fp_skb(fp));
719  buf->os_buf = NULL;
720 }