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ixgbe: fixup hard dependencies on supporting 8 traffic classes
[deliverable/linux.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_dcb_nl.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2011 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
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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 int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *src_dcb_cfg,
48 struct ixgbe_dcb_config *dst_dcb_cfg, int tc_max)
49 {
50 struct tc_configuration *src_tc_cfg = NULL;
51 struct tc_configuration *dst_tc_cfg = NULL;
52 int i;
53
54 if (!src_dcb_cfg || !dst_dcb_cfg)
55 return -EINVAL;
56
57 for (i = DCB_PG_ATTR_TC_0; i < tc_max + DCB_PG_ATTR_TC_0; i++) {
58 src_tc_cfg = &src_dcb_cfg->tc_config[i - DCB_PG_ATTR_TC_0];
59 dst_tc_cfg = &dst_dcb_cfg->tc_config[i - DCB_PG_ATTR_TC_0];
60
61 dst_tc_cfg->path[DCB_TX_CONFIG].prio_type =
62 src_tc_cfg->path[DCB_TX_CONFIG].prio_type;
63
64 dst_tc_cfg->path[DCB_TX_CONFIG].bwg_id =
65 src_tc_cfg->path[DCB_TX_CONFIG].bwg_id;
66
67 dst_tc_cfg->path[DCB_TX_CONFIG].bwg_percent =
68 src_tc_cfg->path[DCB_TX_CONFIG].bwg_percent;
69
70 dst_tc_cfg->path[DCB_TX_CONFIG].up_to_tc_bitmap =
71 src_tc_cfg->path[DCB_TX_CONFIG].up_to_tc_bitmap;
72
73 dst_tc_cfg->path[DCB_RX_CONFIG].prio_type =
74 src_tc_cfg->path[DCB_RX_CONFIG].prio_type;
75
76 dst_tc_cfg->path[DCB_RX_CONFIG].bwg_id =
77 src_tc_cfg->path[DCB_RX_CONFIG].bwg_id;
78
79 dst_tc_cfg->path[DCB_RX_CONFIG].bwg_percent =
80 src_tc_cfg->path[DCB_RX_CONFIG].bwg_percent;
81
82 dst_tc_cfg->path[DCB_RX_CONFIG].up_to_tc_bitmap =
83 src_tc_cfg->path[DCB_RX_CONFIG].up_to_tc_bitmap;
84 }
85
86 for (i = DCB_PG_ATTR_BW_ID_0; i < DCB_PG_ATTR_BW_ID_MAX; i++) {
87 dst_dcb_cfg->bw_percentage[DCB_TX_CONFIG]
88 [i-DCB_PG_ATTR_BW_ID_0] = src_dcb_cfg->bw_percentage
89 [DCB_TX_CONFIG][i-DCB_PG_ATTR_BW_ID_0];
90 dst_dcb_cfg->bw_percentage[DCB_RX_CONFIG]
91 [i-DCB_PG_ATTR_BW_ID_0] = src_dcb_cfg->bw_percentage
92 [DCB_RX_CONFIG][i-DCB_PG_ATTR_BW_ID_0];
93 }
94
95 for (i = DCB_PFC_UP_ATTR_0; i < DCB_PFC_UP_ATTR_MAX; i++) {
96 dst_dcb_cfg->tc_config[i - DCB_PFC_UP_ATTR_0].dcb_pfc =
97 src_dcb_cfg->tc_config[i - DCB_PFC_UP_ATTR_0].dcb_pfc;
98 }
99
100 dst_dcb_cfg->pfc_mode_enable = src_dcb_cfg->pfc_mode_enable;
101
102 return 0;
103 }
104
105 static u8 ixgbe_dcbnl_get_state(struct net_device *netdev)
106 {
107 struct ixgbe_adapter *adapter = netdev_priv(netdev);
108
109 return !!(adapter->flags & IXGBE_FLAG_DCB_ENABLED);
110 }
111
112 static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
113 {
114 u8 err = 0;
115 struct ixgbe_adapter *adapter = netdev_priv(netdev);
116
117 /* Fail command if not in CEE mode */
118 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
119 return 1;
120
121 /* verify there is something to do, if not then exit */
122 if (!!state != !(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
123 return err;
124
125 if (state > 0)
126 err = ixgbe_setup_tc(netdev, adapter->dcb_cfg.num_tcs.pg_tcs);
127 else
128 err = ixgbe_setup_tc(netdev, 0);
129
130 return err;
131 }
132
133 static void ixgbe_dcbnl_get_perm_hw_addr(struct net_device *netdev,
134 u8 *perm_addr)
135 {
136 struct ixgbe_adapter *adapter = netdev_priv(netdev);
137 int i, j;
138
139 memset(perm_addr, 0xff, MAX_ADDR_LEN);
140
141 for (i = 0; i < netdev->addr_len; i++)
142 perm_addr[i] = adapter->hw.mac.perm_addr[i];
143
144 switch (adapter->hw.mac.type) {
145 case ixgbe_mac_82599EB:
146 case ixgbe_mac_X540:
147 for (j = 0; j < netdev->addr_len; j++, i++)
148 perm_addr[i] = adapter->hw.mac.san_addr[j];
149 break;
150 default:
151 break;
152 }
153 }
154
155 static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
156 u8 prio, u8 bwg_id, u8 bw_pct,
157 u8 up_map)
158 {
159 struct ixgbe_adapter *adapter = netdev_priv(netdev);
160
161 /* Abort a bad configuration */
162 if (ffs(up_map) > adapter->dcb_cfg.num_tcs.pg_tcs)
163 return;
164
165 if (prio != DCB_ATTR_VALUE_UNDEFINED)
166 adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type = prio;
167 if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
168 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id = bwg_id;
169 if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
170 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent =
171 bw_pct;
172 if (up_map != DCB_ATTR_VALUE_UNDEFINED)
173 adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap =
174 up_map;
175
176 if ((adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type !=
177 adapter->dcb_cfg.tc_config[tc].path[0].prio_type) ||
178 (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id !=
179 adapter->dcb_cfg.tc_config[tc].path[0].bwg_id) ||
180 (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent !=
181 adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent) ||
182 (adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=
183 adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap))
184 adapter->dcb_set_bitmap |= BIT_PG_TX;
185
186 if (adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=
187 adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap)
188 adapter->dcb_set_bitmap |= BIT_PFC;
189 }
190
191 static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
192 u8 bw_pct)
193 {
194 struct ixgbe_adapter *adapter = netdev_priv(netdev);
195
196 adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;
197
198 if (adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] !=
199 adapter->dcb_cfg.bw_percentage[0][bwg_id])
200 adapter->dcb_set_bitmap |= BIT_PG_TX;
201 }
202
203 static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
204 u8 prio, u8 bwg_id, u8 bw_pct,
205 u8 up_map)
206 {
207 struct ixgbe_adapter *adapter = netdev_priv(netdev);
208
209 /* Abort bad configurations */
210 if (ffs(up_map) > adapter->dcb_cfg.num_tcs.pg_tcs)
211 return;
212
213 if (prio != DCB_ATTR_VALUE_UNDEFINED)
214 adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type = prio;
215 if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
216 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id = bwg_id;
217 if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
218 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent =
219 bw_pct;
220 if (up_map != DCB_ATTR_VALUE_UNDEFINED)
221 adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap =
222 up_map;
223
224 if ((adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type !=
225 adapter->dcb_cfg.tc_config[tc].path[1].prio_type) ||
226 (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id !=
227 adapter->dcb_cfg.tc_config[tc].path[1].bwg_id) ||
228 (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent !=
229 adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent) ||
230 (adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=
231 adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap))
232 adapter->dcb_set_bitmap |= BIT_PG_RX;
233
234 if (adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=
235 adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap)
236 adapter->dcb_set_bitmap |= BIT_PFC;
237 }
238
239 static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
240 u8 bw_pct)
241 {
242 struct ixgbe_adapter *adapter = netdev_priv(netdev);
243
244 adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;
245
246 if (adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] !=
247 adapter->dcb_cfg.bw_percentage[1][bwg_id])
248 adapter->dcb_set_bitmap |= BIT_PG_RX;
249 }
250
251 static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
252 u8 *prio, u8 *bwg_id, u8 *bw_pct,
253 u8 *up_map)
254 {
255 struct ixgbe_adapter *adapter = netdev_priv(netdev);
256
257 *prio = adapter->dcb_cfg.tc_config[tc].path[0].prio_type;
258 *bwg_id = adapter->dcb_cfg.tc_config[tc].path[0].bwg_id;
259 *bw_pct = adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent;
260 *up_map = adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap;
261 }
262
263 static void ixgbe_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
264 u8 *bw_pct)
265 {
266 struct ixgbe_adapter *adapter = netdev_priv(netdev);
267
268 *bw_pct = adapter->dcb_cfg.bw_percentage[0][bwg_id];
269 }
270
271 static void ixgbe_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int tc,
272 u8 *prio, u8 *bwg_id, u8 *bw_pct,
273 u8 *up_map)
274 {
275 struct ixgbe_adapter *adapter = netdev_priv(netdev);
276
277 *prio = adapter->dcb_cfg.tc_config[tc].path[1].prio_type;
278 *bwg_id = adapter->dcb_cfg.tc_config[tc].path[1].bwg_id;
279 *bw_pct = adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent;
280 *up_map = adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap;
281 }
282
283 static void ixgbe_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
284 u8 *bw_pct)
285 {
286 struct ixgbe_adapter *adapter = netdev_priv(netdev);
287
288 *bw_pct = adapter->dcb_cfg.bw_percentage[1][bwg_id];
289 }
290
291 static void ixgbe_dcbnl_set_pfc_cfg(struct net_device *netdev, int priority,
292 u8 setting)
293 {
294 struct ixgbe_adapter *adapter = netdev_priv(netdev);
295
296 adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc = setting;
297 if (adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc !=
298 adapter->dcb_cfg.tc_config[priority].dcb_pfc) {
299 adapter->dcb_set_bitmap |= BIT_PFC;
300 adapter->temp_dcb_cfg.pfc_mode_enable = true;
301 }
302 }
303
304 static void ixgbe_dcbnl_get_pfc_cfg(struct net_device *netdev, int priority,
305 u8 *setting)
306 {
307 struct ixgbe_adapter *adapter = netdev_priv(netdev);
308
309 *setting = adapter->dcb_cfg.tc_config[priority].dcb_pfc;
310 }
311
312 static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
313 {
314 struct ixgbe_adapter *adapter = netdev_priv(netdev);
315 int ret, i;
316 #ifdef IXGBE_FCOE
317 struct dcb_app app = {
318 .selector = DCB_APP_IDTYPE_ETHTYPE,
319 .protocol = ETH_P_FCOE,
320 };
321 u8 up = dcb_getapp(netdev, &app);
322 #endif
323
324 /* Fail command if not in CEE mode */
325 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
326 return 1;
327
328 ret = ixgbe_copy_dcb_cfg(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
329 MAX_TRAFFIC_CLASS);
330 if (ret)
331 return DCB_NO_HW_CHG;
332
333 #ifdef IXGBE_FCOE
334 if (up && (up != (1 << adapter->fcoe.up)))
335 adapter->dcb_set_bitmap |= BIT_APP_UPCHG;
336
337 /*
338 * Only take down the adapter if an app change occurred. FCoE
339 * may shuffle tx rings in this case and this can not be done
340 * without a reset currently.
341 */
342 if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
343 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
344 usleep_range(1000, 2000);
345
346 adapter->fcoe.up = ffs(up) - 1;
347
348 if (netif_running(netdev))
349 netdev->netdev_ops->ndo_stop(netdev);
350 ixgbe_clear_interrupt_scheme(adapter);
351 }
352 #endif
353
354 if (adapter->dcb_cfg.pfc_mode_enable) {
355 switch (adapter->hw.mac.type) {
356 case ixgbe_mac_82599EB:
357 case ixgbe_mac_X540:
358 if (adapter->hw.fc.current_mode != ixgbe_fc_pfc)
359 adapter->last_lfc_mode =
360 adapter->hw.fc.current_mode;
361 break;
362 default:
363 break;
364 }
365 adapter->hw.fc.requested_mode = ixgbe_fc_pfc;
366 } else {
367 switch (adapter->hw.mac.type) {
368 case ixgbe_mac_82598EB:
369 adapter->hw.fc.requested_mode = ixgbe_fc_none;
370 break;
371 case ixgbe_mac_82599EB:
372 case ixgbe_mac_X540:
373 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
374 break;
375 default:
376 break;
377 }
378 }
379
380 #ifdef IXGBE_FCOE
381 if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
382 ixgbe_init_interrupt_scheme(adapter);
383 if (netif_running(netdev))
384 netdev->netdev_ops->ndo_open(netdev);
385 ret = DCB_HW_CHG_RST;
386 }
387 #endif
388
389 if (adapter->dcb_set_bitmap & (BIT_PG_TX|BIT_PG_RX)) {
390 u16 refill[MAX_TRAFFIC_CLASS], max[MAX_TRAFFIC_CLASS];
391 u8 bwg_id[MAX_TRAFFIC_CLASS], prio_type[MAX_TRAFFIC_CLASS];
392 /* Priority to TC mapping in CEE case default to 1:1 */
393 u8 prio_tc[MAX_USER_PRIORITY];
394 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
395
396 #ifdef IXGBE_FCOE
397 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
398 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
399 #endif
400
401 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
402 max_frame, DCB_TX_CONFIG);
403 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
404 max_frame, DCB_RX_CONFIG);
405
406 ixgbe_dcb_unpack_refill(&adapter->dcb_cfg,
407 DCB_TX_CONFIG, refill);
408 ixgbe_dcb_unpack_max(&adapter->dcb_cfg, max);
409 ixgbe_dcb_unpack_bwgid(&adapter->dcb_cfg,
410 DCB_TX_CONFIG, bwg_id);
411 ixgbe_dcb_unpack_prio(&adapter->dcb_cfg,
412 DCB_TX_CONFIG, prio_type);
413 ixgbe_dcb_unpack_map(&adapter->dcb_cfg,
414 DCB_TX_CONFIG, prio_tc);
415
416 ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
417 bwg_id, prio_type, prio_tc);
418
419 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
420 netdev_set_prio_tc_map(netdev, i, prio_tc[i]);
421 }
422
423 if (adapter->dcb_set_bitmap & BIT_PFC) {
424 u8 pfc_en;
425 u8 prio_tc[MAX_USER_PRIORITY];
426
427 ixgbe_dcb_unpack_map(&adapter->dcb_cfg,
428 DCB_TX_CONFIG, prio_tc);
429 ixgbe_dcb_unpack_pfc(&adapter->dcb_cfg, &pfc_en);
430 ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc_en, prio_tc);
431 ret = DCB_HW_CHG;
432 }
433
434 if (adapter->dcb_cfg.pfc_mode_enable)
435 adapter->hw.fc.current_mode = ixgbe_fc_pfc;
436
437 if (adapter->dcb_set_bitmap & BIT_APP_UPCHG)
438 clear_bit(__IXGBE_RESETTING, &adapter->state);
439 adapter->dcb_set_bitmap = 0x00;
440 return ret;
441 }
442
443 static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
444 {
445 struct ixgbe_adapter *adapter = netdev_priv(netdev);
446
447 switch (capid) {
448 case DCB_CAP_ATTR_PG:
449 *cap = true;
450 break;
451 case DCB_CAP_ATTR_PFC:
452 *cap = true;
453 break;
454 case DCB_CAP_ATTR_UP2TC:
455 *cap = false;
456 break;
457 case DCB_CAP_ATTR_PG_TCS:
458 *cap = 0x80;
459 break;
460 case DCB_CAP_ATTR_PFC_TCS:
461 *cap = 0x80;
462 break;
463 case DCB_CAP_ATTR_GSP:
464 *cap = true;
465 break;
466 case DCB_CAP_ATTR_BCN:
467 *cap = false;
468 break;
469 case DCB_CAP_ATTR_DCBX:
470 *cap = adapter->dcbx_cap;
471 break;
472 default:
473 *cap = false;
474 break;
475 }
476
477 return 0;
478 }
479
480 static u8 ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
481 {
482 struct ixgbe_adapter *adapter = netdev_priv(netdev);
483 u8 rval = 0;
484
485 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
486 switch (tcid) {
487 case DCB_NUMTCS_ATTR_PG:
488 *num = adapter->dcb_cfg.num_tcs.pg_tcs;
489 break;
490 case DCB_NUMTCS_ATTR_PFC:
491 *num = adapter->dcb_cfg.num_tcs.pfc_tcs;
492 break;
493 default:
494 rval = -EINVAL;
495 break;
496 }
497 } else {
498 rval = -EINVAL;
499 }
500
501 return rval;
502 }
503
504 static u8 ixgbe_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
505 {
506 return -EINVAL;
507 }
508
509 static u8 ixgbe_dcbnl_getpfcstate(struct net_device *netdev)
510 {
511 struct ixgbe_adapter *adapter = netdev_priv(netdev);
512
513 return adapter->dcb_cfg.pfc_mode_enable;
514 }
515
516 static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
517 {
518 struct ixgbe_adapter *adapter = netdev_priv(netdev);
519
520 adapter->temp_dcb_cfg.pfc_mode_enable = state;
521 if (adapter->temp_dcb_cfg.pfc_mode_enable !=
522 adapter->dcb_cfg.pfc_mode_enable)
523 adapter->dcb_set_bitmap |= BIT_PFC;
524 }
525
526 /**
527 * ixgbe_dcbnl_getapp - retrieve the DCBX application user priority
528 * @netdev : the corresponding netdev
529 * @idtype : identifies the id as ether type or TCP/UDP port number
530 * @id: id is either ether type or TCP/UDP port number
531 *
532 * Returns : on success, returns a non-zero 802.1p user priority bitmap
533 * otherwise returns 0 as the invalid user priority bitmap to indicate an
534 * error.
535 */
536 static u8 ixgbe_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
537 {
538 struct ixgbe_adapter *adapter = netdev_priv(netdev);
539 struct dcb_app app = {
540 .selector = idtype,
541 .protocol = id,
542 };
543
544 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
545 return 0;
546
547 return dcb_getapp(netdev, &app);
548 }
549
550 static int ixgbe_dcbnl_ieee_getets(struct net_device *dev,
551 struct ieee_ets *ets)
552 {
553 struct ixgbe_adapter *adapter = netdev_priv(dev);
554 struct ieee_ets *my_ets = adapter->ixgbe_ieee_ets;
555
556 /* No IEEE PFC settings available */
557 if (!my_ets)
558 return -EINVAL;
559
560 ets->ets_cap = adapter->dcb_cfg.num_tcs.pg_tcs;
561 ets->cbs = my_ets->cbs;
562 memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
563 memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
564 memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
565 memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
566 return 0;
567 }
568
569 static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
570 struct ieee_ets *ets)
571 {
572 struct ixgbe_adapter *adapter = netdev_priv(dev);
573 int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
574 int i;
575 __u8 max_tc = 0;
576
577 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
578 return -EINVAL;
579
580 if (!adapter->ixgbe_ieee_ets) {
581 adapter->ixgbe_ieee_ets = kmalloc(sizeof(struct ieee_ets),
582 GFP_KERNEL);
583 if (!adapter->ixgbe_ieee_ets)
584 return -ENOMEM;
585 }
586
587 memcpy(adapter->ixgbe_ieee_ets, ets, sizeof(*adapter->ixgbe_ieee_ets));
588
589 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
590 if (ets->prio_tc[i] > max_tc)
591 max_tc = ets->prio_tc[i];
592 }
593
594 if (max_tc)
595 max_tc++;
596
597 if (max_tc > adapter->dcb_cfg.num_tcs.pg_tcs)
598 return -EINVAL;
599
600 if (max_tc != netdev_get_num_tc(dev))
601 ixgbe_setup_tc(dev, max_tc);
602
603 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
604 netdev_set_prio_tc_map(dev, i, ets->prio_tc[i]);
605
606 return ixgbe_dcb_hw_ets(&adapter->hw, ets, max_frame);
607 }
608
609 static int ixgbe_dcbnl_ieee_getpfc(struct net_device *dev,
610 struct ieee_pfc *pfc)
611 {
612 struct ixgbe_adapter *adapter = netdev_priv(dev);
613 struct ieee_pfc *my_pfc = adapter->ixgbe_ieee_pfc;
614 int i;
615
616 /* No IEEE PFC settings available */
617 if (!my_pfc)
618 return -EINVAL;
619
620 pfc->pfc_cap = adapter->dcb_cfg.num_tcs.pfc_tcs;
621 pfc->pfc_en = my_pfc->pfc_en;
622 pfc->mbc = my_pfc->mbc;
623 pfc->delay = my_pfc->delay;
624
625 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
626 pfc->requests[i] = adapter->stats.pxoffrxc[i];
627 pfc->indications[i] = adapter->stats.pxofftxc[i];
628 }
629
630 return 0;
631 }
632
633 static int ixgbe_dcbnl_ieee_setpfc(struct net_device *dev,
634 struct ieee_pfc *pfc)
635 {
636 struct ixgbe_adapter *adapter = netdev_priv(dev);
637 u8 *prio_tc;
638
639 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
640 return -EINVAL;
641
642 if (!adapter->ixgbe_ieee_pfc) {
643 adapter->ixgbe_ieee_pfc = kmalloc(sizeof(struct ieee_pfc),
644 GFP_KERNEL);
645 if (!adapter->ixgbe_ieee_pfc)
646 return -ENOMEM;
647 }
648
649 prio_tc = adapter->ixgbe_ieee_ets->prio_tc;
650 memcpy(adapter->ixgbe_ieee_pfc, pfc, sizeof(*adapter->ixgbe_ieee_pfc));
651 return ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc->pfc_en, prio_tc);
652 }
653
654 #ifdef IXGBE_FCOE
655 static void ixgbe_dcbnl_devreset(struct net_device *dev)
656 {
657 struct ixgbe_adapter *adapter = netdev_priv(dev);
658
659 if (netif_running(dev))
660 dev->netdev_ops->ndo_stop(dev);
661
662 ixgbe_clear_interrupt_scheme(adapter);
663 ixgbe_init_interrupt_scheme(adapter);
664
665 if (netif_running(dev))
666 dev->netdev_ops->ndo_open(dev);
667 }
668 #endif
669
670 static int ixgbe_dcbnl_ieee_setapp(struct net_device *dev,
671 struct dcb_app *app)
672 {
673 struct ixgbe_adapter *adapter = netdev_priv(dev);
674 int err = -EINVAL;
675
676 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
677 return err;
678
679 err = dcb_ieee_setapp(dev, app);
680
681 #ifdef IXGBE_FCOE
682 if (!err && app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
683 app->protocol == ETH_P_FCOE) {
684 u8 app_mask = dcb_ieee_getapp_mask(dev, app);
685
686 if (app_mask & (1 << adapter->fcoe.up))
687 return err;
688
689 adapter->fcoe.up = app->priority;
690 ixgbe_dcbnl_devreset(dev);
691 }
692 #endif
693 return 0;
694 }
695
696 static int ixgbe_dcbnl_ieee_delapp(struct net_device *dev,
697 struct dcb_app *app)
698 {
699 struct ixgbe_adapter *adapter = netdev_priv(dev);
700 int err;
701
702 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
703 return -EINVAL;
704
705 err = dcb_ieee_delapp(dev, app);
706
707 #ifdef IXGBE_FCOE
708 if (!err && app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
709 app->protocol == ETH_P_FCOE) {
710 u8 app_mask = dcb_ieee_getapp_mask(dev, app);
711
712 if (app_mask & (1 << adapter->fcoe.up))
713 return err;
714
715 adapter->fcoe.up = app_mask ?
716 ffs(app_mask) - 1 : IXGBE_FCOE_DEFTC;
717 ixgbe_dcbnl_devreset(dev);
718 }
719 #endif
720 return err;
721 }
722
723 static u8 ixgbe_dcbnl_getdcbx(struct net_device *dev)
724 {
725 struct ixgbe_adapter *adapter = netdev_priv(dev);
726 return adapter->dcbx_cap;
727 }
728
729 static u8 ixgbe_dcbnl_setdcbx(struct net_device *dev, u8 mode)
730 {
731 struct ixgbe_adapter *adapter = netdev_priv(dev);
732 struct ieee_ets ets = {0};
733 struct ieee_pfc pfc = {0};
734
735 /* no support for LLD_MANAGED modes or CEE+IEEE */
736 if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
737 ((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
738 !(mode & DCB_CAP_DCBX_HOST))
739 return 1;
740
741 if (mode == adapter->dcbx_cap)
742 return 0;
743
744 adapter->dcbx_cap = mode;
745
746 /* ETS and PFC defaults */
747 ets.ets_cap = 8;
748 pfc.pfc_cap = 8;
749
750 if (mode & DCB_CAP_DCBX_VER_IEEE) {
751 ixgbe_dcbnl_ieee_setets(dev, &ets);
752 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
753 } else if (mode & DCB_CAP_DCBX_VER_CEE) {
754 adapter->dcb_set_bitmap |= (BIT_PFC & BIT_PG_TX & BIT_PG_RX);
755 ixgbe_dcbnl_set_all(dev);
756 } else {
757 /* Drop into single TC mode strict priority as this
758 * indicates CEE and IEEE versions are disabled
759 */
760 ixgbe_dcbnl_ieee_setets(dev, &ets);
761 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
762 ixgbe_setup_tc(dev, 0);
763 }
764
765 return 0;
766 }
767
768 const struct dcbnl_rtnl_ops dcbnl_ops = {
769 .ieee_getets = ixgbe_dcbnl_ieee_getets,
770 .ieee_setets = ixgbe_dcbnl_ieee_setets,
771 .ieee_getpfc = ixgbe_dcbnl_ieee_getpfc,
772 .ieee_setpfc = ixgbe_dcbnl_ieee_setpfc,
773 .ieee_setapp = ixgbe_dcbnl_ieee_setapp,
774 .ieee_delapp = ixgbe_dcbnl_ieee_delapp,
775 .getstate = ixgbe_dcbnl_get_state,
776 .setstate = ixgbe_dcbnl_set_state,
777 .getpermhwaddr = ixgbe_dcbnl_get_perm_hw_addr,
778 .setpgtccfgtx = ixgbe_dcbnl_set_pg_tc_cfg_tx,
779 .setpgbwgcfgtx = ixgbe_dcbnl_set_pg_bwg_cfg_tx,
780 .setpgtccfgrx = ixgbe_dcbnl_set_pg_tc_cfg_rx,
781 .setpgbwgcfgrx = ixgbe_dcbnl_set_pg_bwg_cfg_rx,
782 .getpgtccfgtx = ixgbe_dcbnl_get_pg_tc_cfg_tx,
783 .getpgbwgcfgtx = ixgbe_dcbnl_get_pg_bwg_cfg_tx,
784 .getpgtccfgrx = ixgbe_dcbnl_get_pg_tc_cfg_rx,
785 .getpgbwgcfgrx = ixgbe_dcbnl_get_pg_bwg_cfg_rx,
786 .setpfccfg = ixgbe_dcbnl_set_pfc_cfg,
787 .getpfccfg = ixgbe_dcbnl_get_pfc_cfg,
788 .setall = ixgbe_dcbnl_set_all,
789 .getcap = ixgbe_dcbnl_getcap,
790 .getnumtcs = ixgbe_dcbnl_getnumtcs,
791 .setnumtcs = ixgbe_dcbnl_setnumtcs,
792 .getpfcstate = ixgbe_dcbnl_getpfcstate,
793 .setpfcstate = ixgbe_dcbnl_setpfcstate,
794 .getapp = ixgbe_dcbnl_getapp,
795 .getdcbx = ixgbe_dcbnl_getdcbx,
796 .setdcbx = ixgbe_dcbnl_setdcbx,
797 };
Linux kernel - Deliverables
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