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ixgbe_dcb_nl.c
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1 /*******************************************************************************
2 
3  Intel 10 Gigabit PCI Express Linux driver
4  Copyright(c) 1999 - 2012 Intel Corporation.
5 
6  This program is free software; you can redistribute it and/or modify it
7  under the terms and conditions of the GNU General Public License,
8  version 2, as published by the Free Software Foundation.
9 
10  This program is distributed in the hope it will be useful, but WITHOUT
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12  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13  more details.
14 
15  You should have received a copy of the GNU General Public License along with
16  this program; if not, write to the Free Software Foundation, Inc.,
17  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 
19  The full GNU General Public License is included in this distribution in
20  the file called "COPYING".
21 
22  Contact Information:
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26 
27 *******************************************************************************/
28 
29 #include "ixgbe.h"
30 #include <linux/dcbnl.h>
31 #include "ixgbe_dcb_82598.h"
32 #include "ixgbe_dcb_82599.h"
33 
34 /* Callbacks for DCB netlink in the kernel */
35 #define BIT_DCB_MODE 0x01
36 #define BIT_PFC 0x02
37 #define BIT_PG_RX 0x04
38 #define BIT_PG_TX 0x08
39 #define BIT_APP_UPCHG 0x10
40 #define BIT_LINKSPEED 0x80
41 
42 /* Responses for the DCB_C_SET_ALL command */
43 #define DCB_HW_CHG_RST 0 /* DCB configuration changed with reset */
44 #define DCB_NO_HW_CHG 1 /* DCB configuration did not change */
45 #define DCB_HW_CHG 2 /* DCB configuration changed, no reset */
46 
47 static int ixgbe_copy_dcb_cfg(struct ixgbe_adapter *adapter, int tc_max)
48 {
49  struct ixgbe_dcb_config *scfg = &adapter->temp_dcb_cfg;
50  struct ixgbe_dcb_config *dcfg = &adapter->dcb_cfg;
51  struct tc_configuration *src = NULL;
52  struct tc_configuration *dst = NULL;
53  int i, j;
54  int tx = DCB_TX_CONFIG;
55  int rx = DCB_RX_CONFIG;
56  int changes = 0;
57 #ifdef IXGBE_FCOE
58  struct dcb_app app = {
59  .selector = DCB_APP_IDTYPE_ETHTYPE,
60  .protocol = ETH_P_FCOE,
61  };
62  u8 up = dcb_getapp(adapter->netdev, &app);
63 
64  if (up && !(up & (1 << adapter->fcoe.up)))
65  changes |= BIT_APP_UPCHG;
66 #endif
67 
68  for (i = DCB_PG_ATTR_TC_0; i < tc_max + DCB_PG_ATTR_TC_0; i++) {
69  src = &scfg->tc_config[i - DCB_PG_ATTR_TC_0];
70  dst = &dcfg->tc_config[i - DCB_PG_ATTR_TC_0];
71 
72  if (dst->path[tx].prio_type != src->path[tx].prio_type) {
73  dst->path[tx].prio_type = src->path[tx].prio_type;
74  changes |= BIT_PG_TX;
75  }
76 
77  if (dst->path[tx].bwg_id != src->path[tx].bwg_id) {
78  dst->path[tx].bwg_id = src->path[tx].bwg_id;
79  changes |= BIT_PG_TX;
80  }
81 
82  if (dst->path[tx].bwg_percent != src->path[tx].bwg_percent) {
83  dst->path[tx].bwg_percent = src->path[tx].bwg_percent;
84  changes |= BIT_PG_TX;
85  }
86 
87  if (dst->path[tx].up_to_tc_bitmap !=
88  src->path[tx].up_to_tc_bitmap) {
89  dst->path[tx].up_to_tc_bitmap =
90  src->path[tx].up_to_tc_bitmap;
91  changes |= (BIT_PG_TX | BIT_PFC | BIT_APP_UPCHG);
92  }
93 
94  if (dst->path[rx].prio_type != src->path[rx].prio_type) {
95  dst->path[rx].prio_type = src->path[rx].prio_type;
96  changes |= BIT_PG_RX;
97  }
98 
99  if (dst->path[rx].bwg_id != src->path[rx].bwg_id) {
100  dst->path[rx].bwg_id = src->path[rx].bwg_id;
101  changes |= BIT_PG_RX;
102  }
103 
104  if (dst->path[rx].bwg_percent != src->path[rx].bwg_percent) {
105  dst->path[rx].bwg_percent = src->path[rx].bwg_percent;
106  changes |= BIT_PG_RX;
107  }
108 
109  if (dst->path[rx].up_to_tc_bitmap !=
110  src->path[rx].up_to_tc_bitmap) {
111  dst->path[rx].up_to_tc_bitmap =
112  src->path[rx].up_to_tc_bitmap;
113  changes |= (BIT_PG_RX | BIT_PFC | BIT_APP_UPCHG);
114  }
115  }
116 
117  for (i = DCB_PG_ATTR_BW_ID_0; i < DCB_PG_ATTR_BW_ID_MAX; i++) {
118  j = i - DCB_PG_ATTR_BW_ID_0;
119  if (dcfg->bw_percentage[tx][j] != scfg->bw_percentage[tx][j]) {
120  dcfg->bw_percentage[tx][j] = scfg->bw_percentage[tx][j];
121  changes |= BIT_PG_TX;
122  }
123  if (dcfg->bw_percentage[rx][j] != scfg->bw_percentage[rx][j]) {
124  dcfg->bw_percentage[rx][j] = scfg->bw_percentage[rx][j];
125  changes |= BIT_PG_RX;
126  }
127  }
128 
129  for (i = DCB_PFC_UP_ATTR_0; i < DCB_PFC_UP_ATTR_MAX; i++) {
130  j = i - DCB_PFC_UP_ATTR_0;
131  if (dcfg->tc_config[j].dcb_pfc != scfg->tc_config[j].dcb_pfc) {
132  dcfg->tc_config[j].dcb_pfc = scfg->tc_config[j].dcb_pfc;
133  changes |= BIT_PFC;
134  }
135  }
136 
137  if (dcfg->pfc_mode_enable != scfg->pfc_mode_enable) {
138  dcfg->pfc_mode_enable = scfg->pfc_mode_enable;
139  changes |= BIT_PFC;
140  }
141 
142  return changes;
143 }
144 
145 static u8 ixgbe_dcbnl_get_state(struct net_device *netdev)
146 {
147  struct ixgbe_adapter *adapter = netdev_priv(netdev);
148 
149  return !!(adapter->flags & IXGBE_FLAG_DCB_ENABLED);
150 }
151 
152 static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
153 {
154  struct ixgbe_adapter *adapter = netdev_priv(netdev);
155  int err = 0;
156 
157  /* Fail command if not in CEE mode */
158  if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
159  return 1;
160 
161  /* verify there is something to do, if not then exit */
162  if (!state == !(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
163  goto out;
164 
165  err = ixgbe_setup_tc(netdev,
166  state ? adapter->dcb_cfg.num_tcs.pg_tcs : 0);
167 out:
168  return !!err;
169 }
170 
171 static void ixgbe_dcbnl_get_perm_hw_addr(struct net_device *netdev,
172  u8 *perm_addr)
173 {
174  struct ixgbe_adapter *adapter = netdev_priv(netdev);
175  int i, j;
176 
177  memset(perm_addr, 0xff, MAX_ADDR_LEN);
178 
179  for (i = 0; i < netdev->addr_len; i++)
180  perm_addr[i] = adapter->hw.mac.perm_addr[i];
181 
182  switch (adapter->hw.mac.type) {
183  case ixgbe_mac_82599EB:
184  case ixgbe_mac_X540:
185  for (j = 0; j < netdev->addr_len; j++, i++)
186  perm_addr[i] = adapter->hw.mac.san_addr[j];
187  break;
188  default:
189  break;
190  }
191 }
192 
193 static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
194  u8 prio, u8 bwg_id, u8 bw_pct,
195  u8 up_map)
196 {
197  struct ixgbe_adapter *adapter = netdev_priv(netdev);
198 
199  if (prio != DCB_ATTR_VALUE_UNDEFINED)
200  adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type = prio;
201  if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
202  adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id = bwg_id;
203  if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
204  adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent =
205  bw_pct;
206  if (up_map != DCB_ATTR_VALUE_UNDEFINED)
207  adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap =
208  up_map;
209 }
210 
211 static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
212  u8 bw_pct)
213 {
214  struct ixgbe_adapter *adapter = netdev_priv(netdev);
215 
216  adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;
217 }
218 
219 static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
220  u8 prio, u8 bwg_id, u8 bw_pct,
221  u8 up_map)
222 {
223  struct ixgbe_adapter *adapter = netdev_priv(netdev);
224 
225  if (prio != DCB_ATTR_VALUE_UNDEFINED)
226  adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type = prio;
227  if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
228  adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id = bwg_id;
229  if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
230  adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent =
231  bw_pct;
232  if (up_map != DCB_ATTR_VALUE_UNDEFINED)
233  adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap =
234  up_map;
235 }
236 
237 static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
238  u8 bw_pct)
239 {
240  struct ixgbe_adapter *adapter = netdev_priv(netdev);
241 
242  adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;
243 }
244 
245 static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
246  u8 *prio, u8 *bwg_id, u8 *bw_pct,
247  u8 *up_map)
248 {
249  struct ixgbe_adapter *adapter = netdev_priv(netdev);
250 
251  *prio = adapter->dcb_cfg.tc_config[tc].path[0].prio_type;
252  *bwg_id = adapter->dcb_cfg.tc_config[tc].path[0].bwg_id;
253  *bw_pct = adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent;
254  *up_map = adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap;
255 }
256 
257 static void ixgbe_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
258  u8 *bw_pct)
259 {
260  struct ixgbe_adapter *adapter = netdev_priv(netdev);
261 
262  *bw_pct = adapter->dcb_cfg.bw_percentage[0][bwg_id];
263 }
264 
265 static void ixgbe_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int tc,
266  u8 *prio, u8 *bwg_id, u8 *bw_pct,
267  u8 *up_map)
268 {
269  struct ixgbe_adapter *adapter = netdev_priv(netdev);
270 
271  *prio = adapter->dcb_cfg.tc_config[tc].path[1].prio_type;
272  *bwg_id = adapter->dcb_cfg.tc_config[tc].path[1].bwg_id;
273  *bw_pct = adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent;
274  *up_map = adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap;
275 }
276 
277 static void ixgbe_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
278  u8 *bw_pct)
279 {
280  struct ixgbe_adapter *adapter = netdev_priv(netdev);
281 
282  *bw_pct = adapter->dcb_cfg.bw_percentage[1][bwg_id];
283 }
284 
285 static void ixgbe_dcbnl_set_pfc_cfg(struct net_device *netdev, int priority,
286  u8 setting)
287 {
288  struct ixgbe_adapter *adapter = netdev_priv(netdev);
289 
290  adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc = setting;
291  if (adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc !=
292  adapter->dcb_cfg.tc_config[priority].dcb_pfc)
293  adapter->temp_dcb_cfg.pfc_mode_enable = true;
294 }
295 
296 static void ixgbe_dcbnl_get_pfc_cfg(struct net_device *netdev, int priority,
297  u8 *setting)
298 {
299  struct ixgbe_adapter *adapter = netdev_priv(netdev);
300 
301  *setting = adapter->dcb_cfg.tc_config[priority].dcb_pfc;
302 }
303 
304 #ifdef IXGBE_FCOE
305 static void ixgbe_dcbnl_devreset(struct net_device *dev)
306 {
307  struct ixgbe_adapter *adapter = netdev_priv(dev);
308 
309  while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
310  usleep_range(1000, 2000);
311 
312  if (netif_running(dev))
313  dev->netdev_ops->ndo_stop(dev);
314 
315  ixgbe_clear_interrupt_scheme(adapter);
316  ixgbe_init_interrupt_scheme(adapter);
317 
318  if (netif_running(dev))
319  dev->netdev_ops->ndo_open(dev);
320 
321  clear_bit(__IXGBE_RESETTING, &adapter->state);
322 }
323 #endif
324 
325 static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
326 {
327  struct ixgbe_adapter *adapter = netdev_priv(netdev);
328  struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
329  struct ixgbe_hw *hw = &adapter->hw;
330  int ret = DCB_NO_HW_CHG;
331  int i;
332 
333  /* Fail command if not in CEE mode */
334  if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
335  return ret;
336 
337  adapter->dcb_set_bitmap |= ixgbe_copy_dcb_cfg(adapter,
338  MAX_TRAFFIC_CLASS);
339  if (!adapter->dcb_set_bitmap)
340  return ret;
341 
342  if (adapter->dcb_set_bitmap & (BIT_PG_TX|BIT_PG_RX)) {
343  u16 refill[MAX_TRAFFIC_CLASS], max[MAX_TRAFFIC_CLASS];
344  u8 bwg_id[MAX_TRAFFIC_CLASS], prio_type[MAX_TRAFFIC_CLASS];
345  /* Priority to TC mapping in CEE case default to 1:1 */
346  u8 prio_tc[MAX_USER_PRIORITY];
347  int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
348 
349 #ifdef IXGBE_FCOE
350  if (adapter->netdev->features & NETIF_F_FCOE_MTU)
351  max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
352 #endif
353 
354  ixgbe_dcb_calculate_tc_credits(hw, dcb_cfg, max_frame,
355  DCB_TX_CONFIG);
356  ixgbe_dcb_calculate_tc_credits(hw, dcb_cfg, max_frame,
357  DCB_RX_CONFIG);
358 
359  ixgbe_dcb_unpack_refill(dcb_cfg, DCB_TX_CONFIG, refill);
360  ixgbe_dcb_unpack_max(dcb_cfg, max);
361  ixgbe_dcb_unpack_bwgid(dcb_cfg, DCB_TX_CONFIG, bwg_id);
362  ixgbe_dcb_unpack_prio(dcb_cfg, DCB_TX_CONFIG, prio_type);
363  ixgbe_dcb_unpack_map(dcb_cfg, DCB_TX_CONFIG, prio_tc);
364 
365  ixgbe_dcb_hw_ets_config(hw, refill, max, bwg_id,
366  prio_type, prio_tc);
367 
368  for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
369  netdev_set_prio_tc_map(netdev, i, prio_tc[i]);
370 
371  ret = DCB_HW_CHG_RST;
372  }
373 
374  if (adapter->dcb_set_bitmap & BIT_PFC) {
375  if (dcb_cfg->pfc_mode_enable) {
376  u8 pfc_en;
377  u8 prio_tc[MAX_USER_PRIORITY];
378 
379  ixgbe_dcb_unpack_map(dcb_cfg, DCB_TX_CONFIG, prio_tc);
380  ixgbe_dcb_unpack_pfc(dcb_cfg, &pfc_en);
381  ixgbe_dcb_hw_pfc_config(hw, pfc_en, prio_tc);
382  } else {
383  hw->mac.ops.fc_enable(hw);
384  }
385 
386  ixgbe_set_rx_drop_en(adapter);
387 
388  ret = DCB_HW_CHG;
389  }
390 
391 #ifdef IXGBE_FCOE
392  /* Reprogam FCoE hardware offloads when the traffic class
393  * FCoE is using changes. This happens if the APP info
394  * changes or the up2tc mapping is updated.
395  */
396  if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
397  struct dcb_app app = {
398  .selector = DCB_APP_IDTYPE_ETHTYPE,
399  .protocol = ETH_P_FCOE,
400  };
401  u8 up = dcb_getapp(netdev, &app);
402 
403  adapter->fcoe.up = ffs(up) - 1;
404  ixgbe_dcbnl_devreset(netdev);
405  ret = DCB_HW_CHG_RST;
406  }
407 #endif
408 
409  adapter->dcb_set_bitmap = 0x00;
410  return ret;
411 }
412 
413 static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
414 {
415  struct ixgbe_adapter *adapter = netdev_priv(netdev);
416 
417  switch (capid) {
418  case DCB_CAP_ATTR_PG:
419  *cap = true;
420  break;
421  case DCB_CAP_ATTR_PFC:
422  *cap = true;
423  break;
424  case DCB_CAP_ATTR_UP2TC:
425  *cap = false;
426  break;
427  case DCB_CAP_ATTR_PG_TCS:
428  *cap = 0x80;
429  break;
430  case DCB_CAP_ATTR_PFC_TCS:
431  *cap = 0x80;
432  break;
433  case DCB_CAP_ATTR_GSP:
434  *cap = true;
435  break;
436  case DCB_CAP_ATTR_BCN:
437  *cap = false;
438  break;
439  case DCB_CAP_ATTR_DCBX:
440  *cap = adapter->dcbx_cap;
441  break;
442  default:
443  *cap = false;
444  break;
445  }
446 
447  return 0;
448 }
449 
450 static int ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
451 {
452  struct ixgbe_adapter *adapter = netdev_priv(netdev);
453  u8 rval = 0;
454 
455  if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
456  switch (tcid) {
457  case DCB_NUMTCS_ATTR_PG:
458  *num = adapter->dcb_cfg.num_tcs.pg_tcs;
459  break;
460  case DCB_NUMTCS_ATTR_PFC:
461  *num = adapter->dcb_cfg.num_tcs.pfc_tcs;
462  break;
463  default:
464  rval = -EINVAL;
465  break;
466  }
467  } else {
468  rval = -EINVAL;
469  }
470 
471  return rval;
472 }
473 
474 static int ixgbe_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
475 {
476  return -EINVAL;
477 }
478 
479 static u8 ixgbe_dcbnl_getpfcstate(struct net_device *netdev)
480 {
481  struct ixgbe_adapter *adapter = netdev_priv(netdev);
482 
483  return adapter->dcb_cfg.pfc_mode_enable;
484 }
485 
486 static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
487 {
488  struct ixgbe_adapter *adapter = netdev_priv(netdev);
489 
490  adapter->temp_dcb_cfg.pfc_mode_enable = state;
491 }
492 
503 static u8 ixgbe_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
504 {
505  struct ixgbe_adapter *adapter = netdev_priv(netdev);
506  struct dcb_app app = {
507  .selector = idtype,
508  .protocol = id,
509  };
510 
511  if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
512  return 0;
513 
514  return dcb_getapp(netdev, &app);
515 }
516 
517 static int ixgbe_dcbnl_ieee_getets(struct net_device *dev,
518  struct ieee_ets *ets)
519 {
520  struct ixgbe_adapter *adapter = netdev_priv(dev);
521  struct ieee_ets *my_ets = adapter->ixgbe_ieee_ets;
522 
523  ets->ets_cap = adapter->dcb_cfg.num_tcs.pg_tcs;
524 
525  /* No IEEE PFC settings available */
526  if (!my_ets)
527  return 0;
528 
529  ets->cbs = my_ets->cbs;
530  memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
531  memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
532  memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
533  memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
534  return 0;
535 }
536 
537 static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
538  struct ieee_ets *ets)
539 {
540  struct ixgbe_adapter *adapter = netdev_priv(dev);
541  int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
542  int i, err = 0;
543  __u8 max_tc = 0;
544 
545  if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
546  return -EINVAL;
547 
548  if (!adapter->ixgbe_ieee_ets) {
549  adapter->ixgbe_ieee_ets = kmalloc(sizeof(struct ieee_ets),
550  GFP_KERNEL);
551  if (!adapter->ixgbe_ieee_ets)
552  return -ENOMEM;
553  }
554 
555  memcpy(adapter->ixgbe_ieee_ets, ets, sizeof(*adapter->ixgbe_ieee_ets));
556 
557  for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
558  if (ets->prio_tc[i] > max_tc)
559  max_tc = ets->prio_tc[i];
560  }
561 
562  if (max_tc)
563  max_tc++;
564 
565  if (max_tc > adapter->dcb_cfg.num_tcs.pg_tcs)
566  return -EINVAL;
567 
568  if (max_tc != netdev_get_num_tc(dev))
569  err = ixgbe_setup_tc(dev, max_tc);
570 
571  if (err)
572  goto err_out;
573 
574  err = ixgbe_dcb_hw_ets(&adapter->hw, ets, max_frame);
575 err_out:
576  return err;
577 }
578 
579 static int ixgbe_dcbnl_ieee_getpfc(struct net_device *dev,
580  struct ieee_pfc *pfc)
581 {
582  struct ixgbe_adapter *adapter = netdev_priv(dev);
583  struct ieee_pfc *my_pfc = adapter->ixgbe_ieee_pfc;
584  int i;
585 
586  pfc->pfc_cap = adapter->dcb_cfg.num_tcs.pfc_tcs;
587 
588  /* No IEEE PFC settings available */
589  if (!my_pfc)
590  return 0;
591 
592  pfc->pfc_en = my_pfc->pfc_en;
593  pfc->mbc = my_pfc->mbc;
594  pfc->delay = my_pfc->delay;
595 
596  for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
597  pfc->requests[i] = adapter->stats.pxoffrxc[i];
598  pfc->indications[i] = adapter->stats.pxofftxc[i];
599  }
600 
601  return 0;
602 }
603 
604 static int ixgbe_dcbnl_ieee_setpfc(struct net_device *dev,
605  struct ieee_pfc *pfc)
606 {
607  struct ixgbe_adapter *adapter = netdev_priv(dev);
608  struct ixgbe_hw *hw = &adapter->hw;
609  u8 *prio_tc;
610  int err;
611 
612  if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
613  return -EINVAL;
614 
615  if (!adapter->ixgbe_ieee_pfc) {
616  adapter->ixgbe_ieee_pfc = kmalloc(sizeof(struct ieee_pfc),
617  GFP_KERNEL);
618  if (!adapter->ixgbe_ieee_pfc)
619  return -ENOMEM;
620  }
621 
622  prio_tc = adapter->ixgbe_ieee_ets->prio_tc;
623  memcpy(adapter->ixgbe_ieee_pfc, pfc, sizeof(*adapter->ixgbe_ieee_pfc));
624 
625  /* Enable link flow control parameters if PFC is disabled */
626  if (pfc->pfc_en)
627  err = ixgbe_dcb_hw_pfc_config(hw, pfc->pfc_en, prio_tc);
628  else
629  err = hw->mac.ops.fc_enable(hw);
630 
631  ixgbe_set_rx_drop_en(adapter);
632 
633  return err;
634 }
635 
636 static int ixgbe_dcbnl_ieee_setapp(struct net_device *dev,
637  struct dcb_app *app)
638 {
639  struct ixgbe_adapter *adapter = netdev_priv(dev);
640  int err = -EINVAL;
641 
642  if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
643  return err;
644 
645  err = dcb_ieee_setapp(dev, app);
646 
647 #ifdef IXGBE_FCOE
648  if (!err && app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
649  app->protocol == ETH_P_FCOE) {
650  u8 app_mask = dcb_ieee_getapp_mask(dev, app);
651 
652  if (app_mask & (1 << adapter->fcoe.up))
653  return err;
654 
655  adapter->fcoe.up = app->priority;
656  ixgbe_dcbnl_devreset(dev);
657  }
658 #endif
659  return 0;
660 }
661 
662 static int ixgbe_dcbnl_ieee_delapp(struct net_device *dev,
663  struct dcb_app *app)
664 {
665  struct ixgbe_adapter *adapter = netdev_priv(dev);
666  int err;
667 
668  if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
669  return -EINVAL;
670 
671  err = dcb_ieee_delapp(dev, app);
672 
673 #ifdef IXGBE_FCOE
674  if (!err && app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
675  app->protocol == ETH_P_FCOE) {
676  u8 app_mask = dcb_ieee_getapp_mask(dev, app);
677 
678  if (app_mask & (1 << adapter->fcoe.up))
679  return err;
680 
681  adapter->fcoe.up = app_mask ?
682  ffs(app_mask) - 1 : IXGBE_FCOE_DEFTC;
683  ixgbe_dcbnl_devreset(dev);
684  }
685 #endif
686  return err;
687 }
688 
689 static u8 ixgbe_dcbnl_getdcbx(struct net_device *dev)
690 {
691  struct ixgbe_adapter *adapter = netdev_priv(dev);
692  return adapter->dcbx_cap;
693 }
694 
695 static u8 ixgbe_dcbnl_setdcbx(struct net_device *dev, u8 mode)
696 {
697  struct ixgbe_adapter *adapter = netdev_priv(dev);
698  struct ieee_ets ets = {0};
699  struct ieee_pfc pfc = {0};
700  int err = 0;
701 
702  /* no support for LLD_MANAGED modes or CEE+IEEE */
703  if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
704  ((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
705  !(mode & DCB_CAP_DCBX_HOST))
706  return 1;
707 
708  if (mode == adapter->dcbx_cap)
709  return 0;
710 
711  adapter->dcbx_cap = mode;
712 
713  /* ETS and PFC defaults */
714  ets.ets_cap = 8;
715  pfc.pfc_cap = 8;
716 
717  if (mode & DCB_CAP_DCBX_VER_IEEE) {
718  ixgbe_dcbnl_ieee_setets(dev, &ets);
719  ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
720  } else if (mode & DCB_CAP_DCBX_VER_CEE) {
721  u8 mask = BIT_PFC | BIT_PG_TX | BIT_PG_RX | BIT_APP_UPCHG;
722 
723  adapter->dcb_set_bitmap |= mask;
724  ixgbe_dcbnl_set_all(dev);
725  } else {
726  /* Drop into single TC mode strict priority as this
727  * indicates CEE and IEEE versions are disabled
728  */
729  ixgbe_dcbnl_ieee_setets(dev, &ets);
730  ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
731  err = ixgbe_setup_tc(dev, 0);
732  }
733 
734  return err ? 1 : 0;
735 }
736 
737 const struct dcbnl_rtnl_ops dcbnl_ops = {
738  .ieee_getets = ixgbe_dcbnl_ieee_getets,
739  .ieee_setets = ixgbe_dcbnl_ieee_setets,
740  .ieee_getpfc = ixgbe_dcbnl_ieee_getpfc,
741  .ieee_setpfc = ixgbe_dcbnl_ieee_setpfc,
742  .ieee_setapp = ixgbe_dcbnl_ieee_setapp,
743  .ieee_delapp = ixgbe_dcbnl_ieee_delapp,
744  .getstate = ixgbe_dcbnl_get_state,
745  .setstate = ixgbe_dcbnl_set_state,
746  .getpermhwaddr = ixgbe_dcbnl_get_perm_hw_addr,
747  .setpgtccfgtx = ixgbe_dcbnl_set_pg_tc_cfg_tx,
748  .setpgbwgcfgtx = ixgbe_dcbnl_set_pg_bwg_cfg_tx,
749  .setpgtccfgrx = ixgbe_dcbnl_set_pg_tc_cfg_rx,
750  .setpgbwgcfgrx = ixgbe_dcbnl_set_pg_bwg_cfg_rx,
751  .getpgtccfgtx = ixgbe_dcbnl_get_pg_tc_cfg_tx,
752  .getpgbwgcfgtx = ixgbe_dcbnl_get_pg_bwg_cfg_tx,
753  .getpgtccfgrx = ixgbe_dcbnl_get_pg_tc_cfg_rx,
754  .getpgbwgcfgrx = ixgbe_dcbnl_get_pg_bwg_cfg_rx,
755  .setpfccfg = ixgbe_dcbnl_set_pfc_cfg,
756  .getpfccfg = ixgbe_dcbnl_get_pfc_cfg,
757  .setall = ixgbe_dcbnl_set_all,
758  .getcap = ixgbe_dcbnl_getcap,
759  .getnumtcs = ixgbe_dcbnl_getnumtcs,
760  .setnumtcs = ixgbe_dcbnl_setnumtcs,
761  .getpfcstate = ixgbe_dcbnl_getpfcstate,
762  .setpfcstate = ixgbe_dcbnl_setpfcstate,
763  .getapp = ixgbe_dcbnl_getapp,
764  .getdcbx = ixgbe_dcbnl_getdcbx,
765  .setdcbx = ixgbe_dcbnl_setdcbx,
766 };
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