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ixgbe: DCB, use multiple Tx rings per traffic class
[deliverable/linux.git] / drivers / net / 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 if (state > 0) {
118 /* Turn on DCB */
119 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
120 goto out;
121
122 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
123 e_err(drv, "Enable failed, needs MSI-X\n");
124 err = 1;
125 goto out;
126 }
127
128 if (netif_running(netdev))
129 netdev->netdev_ops->ndo_stop(netdev);
130 ixgbe_clear_interrupt_scheme(adapter);
131
132 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
133 switch (adapter->hw.mac.type) {
134 case ixgbe_mac_82598EB:
135 adapter->last_lfc_mode = adapter->hw.fc.current_mode;
136 adapter->hw.fc.requested_mode = ixgbe_fc_none;
137 break;
138 case ixgbe_mac_82599EB:
139 case ixgbe_mac_X540:
140 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
141 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
142 break;
143 default:
144 break;
145 }
146
147 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
148 if (!netdev_get_num_tc(netdev))
149 ixgbe_setup_tc(netdev, MAX_TRAFFIC_CLASS);
150
151 ixgbe_init_interrupt_scheme(adapter);
152 if (netif_running(netdev))
153 netdev->netdev_ops->ndo_open(netdev);
154 } else {
155 /* Turn off DCB */
156 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
157 if (netif_running(netdev))
158 netdev->netdev_ops->ndo_stop(netdev);
159 ixgbe_clear_interrupt_scheme(adapter);
160
161 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
162 adapter->temp_dcb_cfg.pfc_mode_enable = false;
163 adapter->dcb_cfg.pfc_mode_enable = false;
164 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
165 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
166 switch (adapter->hw.mac.type) {
167 case ixgbe_mac_82599EB:
168 case ixgbe_mac_X540:
169 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
170 break;
171 default:
172 break;
173 }
174
175 ixgbe_setup_tc(netdev, 0);
176
177 ixgbe_init_interrupt_scheme(adapter);
178 if (netif_running(netdev))
179 netdev->netdev_ops->ndo_open(netdev);
180 }
181 }
182 out:
183 return err;
184 }
185
186 static void ixgbe_dcbnl_get_perm_hw_addr(struct net_device *netdev,
187 u8 *perm_addr)
188 {
189 struct ixgbe_adapter *adapter = netdev_priv(netdev);
190 int i, j;
191
192 memset(perm_addr, 0xff, MAX_ADDR_LEN);
193
194 for (i = 0; i < netdev->addr_len; i++)
195 perm_addr[i] = adapter->hw.mac.perm_addr[i];
196
197 switch (adapter->hw.mac.type) {
198 case ixgbe_mac_82599EB:
199 case ixgbe_mac_X540:
200 for (j = 0; j < netdev->addr_len; j++, i++)
201 perm_addr[i] = adapter->hw.mac.san_addr[j];
202 break;
203 default:
204 break;
205 }
206 }
207
208 static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
209 u8 prio, u8 bwg_id, u8 bw_pct,
210 u8 up_map)
211 {
212 struct ixgbe_adapter *adapter = netdev_priv(netdev);
213
214 if (prio != DCB_ATTR_VALUE_UNDEFINED)
215 adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type = prio;
216 if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
217 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id = bwg_id;
218 if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
219 adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent =
220 bw_pct;
221 if (up_map != DCB_ATTR_VALUE_UNDEFINED)
222 adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap =
223 up_map;
224
225 if ((adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type !=
226 adapter->dcb_cfg.tc_config[tc].path[0].prio_type) ||
227 (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id !=
228 adapter->dcb_cfg.tc_config[tc].path[0].bwg_id) ||
229 (adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent !=
230 adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent) ||
231 (adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap !=
232 adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap))
233 adapter->dcb_set_bitmap |= BIT_PG_TX;
234 }
235
236 static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
237 u8 bw_pct)
238 {
239 struct ixgbe_adapter *adapter = netdev_priv(netdev);
240
241 adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;
242
243 if (adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] !=
244 adapter->dcb_cfg.bw_percentage[0][bwg_id])
245 adapter->dcb_set_bitmap |= BIT_PG_TX;
246 }
247
248 static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
249 u8 prio, u8 bwg_id, u8 bw_pct,
250 u8 up_map)
251 {
252 struct ixgbe_adapter *adapter = netdev_priv(netdev);
253
254 if (prio != DCB_ATTR_VALUE_UNDEFINED)
255 adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type = prio;
256 if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
257 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id = bwg_id;
258 if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
259 adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent =
260 bw_pct;
261 if (up_map != DCB_ATTR_VALUE_UNDEFINED)
262 adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap =
263 up_map;
264
265 if ((adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type !=
266 adapter->dcb_cfg.tc_config[tc].path[1].prio_type) ||
267 (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id !=
268 adapter->dcb_cfg.tc_config[tc].path[1].bwg_id) ||
269 (adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent !=
270 adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent) ||
271 (adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap !=
272 adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap))
273 adapter->dcb_set_bitmap |= BIT_PG_RX;
274 }
275
276 static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
277 u8 bw_pct)
278 {
279 struct ixgbe_adapter *adapter = netdev_priv(netdev);
280
281 adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;
282
283 if (adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] !=
284 adapter->dcb_cfg.bw_percentage[1][bwg_id])
285 adapter->dcb_set_bitmap |= BIT_PG_RX;
286 }
287
288 static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
289 u8 *prio, u8 *bwg_id, u8 *bw_pct,
290 u8 *up_map)
291 {
292 struct ixgbe_adapter *adapter = netdev_priv(netdev);
293
294 *prio = adapter->dcb_cfg.tc_config[tc].path[0].prio_type;
295 *bwg_id = adapter->dcb_cfg.tc_config[tc].path[0].bwg_id;
296 *bw_pct = adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent;
297 *up_map = adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap;
298 }
299
300 static void ixgbe_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
301 u8 *bw_pct)
302 {
303 struct ixgbe_adapter *adapter = netdev_priv(netdev);
304
305 *bw_pct = adapter->dcb_cfg.bw_percentage[0][bwg_id];
306 }
307
308 static void ixgbe_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int tc,
309 u8 *prio, u8 *bwg_id, u8 *bw_pct,
310 u8 *up_map)
311 {
312 struct ixgbe_adapter *adapter = netdev_priv(netdev);
313
314 *prio = adapter->dcb_cfg.tc_config[tc].path[1].prio_type;
315 *bwg_id = adapter->dcb_cfg.tc_config[tc].path[1].bwg_id;
316 *bw_pct = adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent;
317 *up_map = adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap;
318 }
319
320 static void ixgbe_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
321 u8 *bw_pct)
322 {
323 struct ixgbe_adapter *adapter = netdev_priv(netdev);
324
325 *bw_pct = adapter->dcb_cfg.bw_percentage[1][bwg_id];
326 }
327
328 static void ixgbe_dcbnl_set_pfc_cfg(struct net_device *netdev, int priority,
329 u8 setting)
330 {
331 struct ixgbe_adapter *adapter = netdev_priv(netdev);
332
333 adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc = setting;
334 if (adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc !=
335 adapter->dcb_cfg.tc_config[priority].dcb_pfc) {
336 adapter->dcb_set_bitmap |= BIT_PFC;
337 adapter->temp_dcb_cfg.pfc_mode_enable = true;
338 }
339 }
340
341 static void ixgbe_dcbnl_get_pfc_cfg(struct net_device *netdev, int priority,
342 u8 *setting)
343 {
344 struct ixgbe_adapter *adapter = netdev_priv(netdev);
345
346 *setting = adapter->dcb_cfg.tc_config[priority].dcb_pfc;
347 }
348
349 static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
350 {
351 struct ixgbe_adapter *adapter = netdev_priv(netdev);
352 int ret;
353
354 if (!adapter->dcb_set_bitmap ||
355 !(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
356 return DCB_NO_HW_CHG;
357
358 ret = ixgbe_copy_dcb_cfg(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
359 MAX_TRAFFIC_CLASS);
360
361 if (ret)
362 return DCB_NO_HW_CHG;
363
364 /*
365 * Only take down the adapter if an app change occured. FCoE
366 * may shuffle tx rings in this case and this can not be done
367 * without a reset currently.
368 */
369 if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
370 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
371 msleep(1);
372
373 if (netif_running(netdev))
374 netdev->netdev_ops->ndo_stop(netdev);
375 ixgbe_clear_interrupt_scheme(adapter);
376 }
377
378 if (adapter->dcb_cfg.pfc_mode_enable) {
379 switch (adapter->hw.mac.type) {
380 case ixgbe_mac_82599EB:
381 case ixgbe_mac_X540:
382 if (adapter->hw.fc.current_mode != ixgbe_fc_pfc)
383 adapter->last_lfc_mode =
384 adapter->hw.fc.current_mode;
385 break;
386 default:
387 break;
388 }
389 adapter->hw.fc.requested_mode = ixgbe_fc_pfc;
390 } else {
391 switch (adapter->hw.mac.type) {
392 case ixgbe_mac_82598EB:
393 adapter->hw.fc.requested_mode = ixgbe_fc_none;
394 break;
395 case ixgbe_mac_82599EB:
396 case ixgbe_mac_X540:
397 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
398 break;
399 default:
400 break;
401 }
402 }
403
404 if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
405 ixgbe_init_interrupt_scheme(adapter);
406 if (netif_running(netdev))
407 netdev->netdev_ops->ndo_open(netdev);
408 ret = DCB_HW_CHG_RST;
409 }
410
411 if (adapter->dcb_set_bitmap & BIT_PFC) {
412 u8 pfc_en;
413 ixgbe_dcb_unpack_pfc(&adapter->dcb_cfg, &pfc_en);
414 ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc_en);
415 ret = DCB_HW_CHG;
416 }
417
418 if (adapter->dcb_set_bitmap & (BIT_PG_TX|BIT_PG_RX)) {
419 u16 refill[MAX_TRAFFIC_CLASS], max[MAX_TRAFFIC_CLASS];
420 u8 bwg_id[MAX_TRAFFIC_CLASS], prio_type[MAX_TRAFFIC_CLASS];
421 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
422
423 #ifdef CONFIG_FCOE
424 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
425 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
426 #endif
427
428 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
429 max_frame, DCB_TX_CONFIG);
430 ixgbe_dcb_calculate_tc_credits(&adapter->hw, &adapter->dcb_cfg,
431 max_frame, DCB_RX_CONFIG);
432
433 ixgbe_dcb_unpack_refill(&adapter->dcb_cfg,
434 DCB_TX_CONFIG, refill);
435 ixgbe_dcb_unpack_max(&adapter->dcb_cfg, max);
436 ixgbe_dcb_unpack_bwgid(&adapter->dcb_cfg,
437 DCB_TX_CONFIG, bwg_id);
438 ixgbe_dcb_unpack_prio(&adapter->dcb_cfg,
439 DCB_TX_CONFIG, prio_type);
440
441 ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
442 bwg_id, prio_type);
443 }
444
445 if (adapter->dcb_cfg.pfc_mode_enable)
446 adapter->hw.fc.current_mode = ixgbe_fc_pfc;
447
448 if (adapter->dcb_set_bitmap & BIT_APP_UPCHG)
449 clear_bit(__IXGBE_RESETTING, &adapter->state);
450 adapter->dcb_set_bitmap = 0x00;
451 return ret;
452 }
453
454 static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
455 {
456 struct ixgbe_adapter *adapter = netdev_priv(netdev);
457
458 switch (capid) {
459 case DCB_CAP_ATTR_PG:
460 *cap = true;
461 break;
462 case DCB_CAP_ATTR_PFC:
463 *cap = true;
464 break;
465 case DCB_CAP_ATTR_UP2TC:
466 *cap = false;
467 break;
468 case DCB_CAP_ATTR_PG_TCS:
469 *cap = 0x80;
470 break;
471 case DCB_CAP_ATTR_PFC_TCS:
472 *cap = 0x80;
473 break;
474 case DCB_CAP_ATTR_GSP:
475 *cap = true;
476 break;
477 case DCB_CAP_ATTR_BCN:
478 *cap = false;
479 break;
480 case DCB_CAP_ATTR_DCBX:
481 *cap = adapter->dcbx_cap;
482 break;
483 default:
484 *cap = false;
485 break;
486 }
487
488 return 0;
489 }
490
491 static u8 ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
492 {
493 struct ixgbe_adapter *adapter = netdev_priv(netdev);
494 u8 rval = 0;
495
496 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
497 switch (tcid) {
498 case DCB_NUMTCS_ATTR_PG:
499 *num = MAX_TRAFFIC_CLASS;
500 break;
501 case DCB_NUMTCS_ATTR_PFC:
502 *num = MAX_TRAFFIC_CLASS;
503 break;
504 default:
505 rval = -EINVAL;
506 break;
507 }
508 } else {
509 rval = -EINVAL;
510 }
511
512 return rval;
513 }
514
515 static u8 ixgbe_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
516 {
517 return -EINVAL;
518 }
519
520 static u8 ixgbe_dcbnl_getpfcstate(struct net_device *netdev)
521 {
522 struct ixgbe_adapter *adapter = netdev_priv(netdev);
523
524 return adapter->dcb_cfg.pfc_mode_enable;
525 }
526
527 static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
528 {
529 struct ixgbe_adapter *adapter = netdev_priv(netdev);
530
531 adapter->temp_dcb_cfg.pfc_mode_enable = state;
532 if (adapter->temp_dcb_cfg.pfc_mode_enable !=
533 adapter->dcb_cfg.pfc_mode_enable)
534 adapter->dcb_set_bitmap |= BIT_PFC;
535 }
536
537 /**
538 * ixgbe_dcbnl_getapp - retrieve the DCBX application user priority
539 * @netdev : the corresponding netdev
540 * @idtype : identifies the id as ether type or TCP/UDP port number
541 * @id: id is either ether type or TCP/UDP port number
542 *
543 * Returns : on success, returns a non-zero 802.1p user priority bitmap
544 * otherwise returns 0 as the invalid user priority bitmap to indicate an
545 * error.
546 */
547 static u8 ixgbe_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
548 {
549 struct ixgbe_adapter *adapter = netdev_priv(netdev);
550 struct dcb_app app = {
551 .selector = idtype,
552 .protocol = id,
553 };
554
555 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
556 return 0;
557
558 return dcb_getapp(netdev, &app);
559 }
560
561 /**
562 * ixgbe_dcbnl_setapp - set the DCBX application user priority
563 * @netdev : the corresponding netdev
564 * @idtype : identifies the id as ether type or TCP/UDP port number
565 * @id: id is either ether type or TCP/UDP port number
566 * @up: the 802.1p user priority bitmap
567 *
568 * Returns : 0 on success or 1 on error
569 */
570 static u8 ixgbe_dcbnl_setapp(struct net_device *netdev,
571 u8 idtype, u16 id, u8 up)
572 {
573 struct ixgbe_adapter *adapter = netdev_priv(netdev);
574 u8 rval = 1;
575 struct dcb_app app = {
576 .selector = idtype,
577 .protocol = id,
578 .priority = up
579 };
580
581 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
582 return rval;
583
584 rval = dcb_setapp(netdev, &app);
585
586 switch (idtype) {
587 case DCB_APP_IDTYPE_ETHTYPE:
588 #ifdef IXGBE_FCOE
589 if (id == ETH_P_FCOE) {
590 u8 old_tc;
591
592 /* Get current programmed tc */
593 old_tc = adapter->fcoe.tc;
594 rval = ixgbe_fcoe_setapp(adapter, up);
595
596 if (rval ||
597 !(adapter->flags & IXGBE_FLAG_DCB_ENABLED) ||
598 !(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
599 break;
600
601 /* The FCoE application priority may be changed multiple
602 * times in quick sucession with switches that build up
603 * TLVs. To avoid creating uneeded device resets this
604 * checks the actual HW configuration and clears
605 * BIT_APP_UPCHG if a HW configuration change is not
606 * need
607 */
608 if (old_tc == adapter->fcoe.tc)
609 adapter->dcb_set_bitmap &= ~BIT_APP_UPCHG;
610 else
611 adapter->dcb_set_bitmap |= BIT_APP_UPCHG;
612 }
613 #endif
614 break;
615 case DCB_APP_IDTYPE_PORTNUM:
616 break;
617 default:
618 break;
619 }
620 return rval;
621 }
622
623 static int ixgbe_dcbnl_ieee_getets(struct net_device *dev,
624 struct ieee_ets *ets)
625 {
626 struct ixgbe_adapter *adapter = netdev_priv(dev);
627 struct ieee_ets *my_ets = adapter->ixgbe_ieee_ets;
628
629 /* No IEEE PFC settings available */
630 if (!my_ets)
631 return -EINVAL;
632
633 ets->ets_cap = MAX_TRAFFIC_CLASS;
634 ets->cbs = my_ets->cbs;
635 memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
636 memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
637 memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
638 memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
639 return 0;
640 }
641
642 static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
643 struct ieee_ets *ets)
644 {
645 struct ixgbe_adapter *adapter = netdev_priv(dev);
646 __u16 refill[IEEE_8021QAZ_MAX_TCS], max[IEEE_8021QAZ_MAX_TCS];
647 int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
648 int err;
649 /* naively give each TC a bwg to map onto CEE hardware */
650 __u8 bwg_id[IEEE_8021QAZ_MAX_TCS] = {0, 1, 2, 3, 4, 5, 6, 7};
651
652 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
653 return -EINVAL;
654
655 if (!adapter->ixgbe_ieee_ets) {
656 adapter->ixgbe_ieee_ets = kmalloc(sizeof(struct ieee_ets),
657 GFP_KERNEL);
658 if (!adapter->ixgbe_ieee_ets)
659 return -ENOMEM;
660 }
661
662 memcpy(adapter->ixgbe_ieee_ets, ets, sizeof(*adapter->ixgbe_ieee_ets));
663
664 ixgbe_ieee_credits(ets->tc_tx_bw, refill, max, max_frame);
665 err = ixgbe_dcb_hw_ets_config(&adapter->hw, refill, max,
666 bwg_id, ets->tc_tsa);
667 return err;
668 }
669
670 static int ixgbe_dcbnl_ieee_getpfc(struct net_device *dev,
671 struct ieee_pfc *pfc)
672 {
673 struct ixgbe_adapter *adapter = netdev_priv(dev);
674 struct ieee_pfc *my_pfc = adapter->ixgbe_ieee_pfc;
675 int i;
676
677 /* No IEEE PFC settings available */
678 if (!my_pfc)
679 return -EINVAL;
680
681 pfc->pfc_cap = MAX_TRAFFIC_CLASS;
682 pfc->pfc_en = my_pfc->pfc_en;
683 pfc->mbc = my_pfc->mbc;
684 pfc->delay = my_pfc->delay;
685
686 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
687 pfc->requests[i] = adapter->stats.pxoffrxc[i];
688 pfc->indications[i] = adapter->stats.pxofftxc[i];
689 }
690
691 return 0;
692 }
693
694 static int ixgbe_dcbnl_ieee_setpfc(struct net_device *dev,
695 struct ieee_pfc *pfc)
696 {
697 struct ixgbe_adapter *adapter = netdev_priv(dev);
698 int err;
699
700 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
701 return -EINVAL;
702
703 if (!adapter->ixgbe_ieee_pfc) {
704 adapter->ixgbe_ieee_pfc = kmalloc(sizeof(struct ieee_pfc),
705 GFP_KERNEL);
706 if (!adapter->ixgbe_ieee_pfc)
707 return -ENOMEM;
708 }
709
710 memcpy(adapter->ixgbe_ieee_pfc, pfc, sizeof(*adapter->ixgbe_ieee_pfc));
711 err = ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc->pfc_en);
712 return err;
713 }
714
715 static int ixgbe_dcbnl_ieee_setapp(struct net_device *dev,
716 struct dcb_app *app)
717 {
718 struct ixgbe_adapter *adapter = netdev_priv(dev);
719
720 if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
721 return -EINVAL;
722 #ifdef IXGBE_FCOE
723 if (app->selector == 1 && app->protocol == ETH_P_FCOE) {
724 if (adapter->fcoe.tc == app->priority)
725 goto setapp;
726
727 /* In IEEE mode map up to tc 1:1 */
728 adapter->fcoe.tc = app->priority;
729 adapter->fcoe.up = app->priority;
730
731 /* Force hardware reset required to push FCoE
732 * setup on {tx|rx}_rings
733 */
734 adapter->dcb_set_bitmap |= BIT_APP_UPCHG;
735 ixgbe_dcbnl_set_all(dev);
736 }
737
738 setapp:
739 #endif
740 dcb_setapp(dev, app);
741 return 0;
742 }
743
744 static u8 ixgbe_dcbnl_getdcbx(struct net_device *dev)
745 {
746 struct ixgbe_adapter *adapter = netdev_priv(dev);
747 return adapter->dcbx_cap;
748 }
749
750 static u8 ixgbe_dcbnl_setdcbx(struct net_device *dev, u8 mode)
751 {
752 struct ixgbe_adapter *adapter = netdev_priv(dev);
753 struct ieee_ets ets = {0};
754 struct ieee_pfc pfc = {0};
755
756 /* no support for LLD_MANAGED modes or CEE+IEEE */
757 if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
758 ((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
759 !(mode & DCB_CAP_DCBX_HOST))
760 return 1;
761
762 if (mode == adapter->dcbx_cap)
763 return 0;
764
765 adapter->dcbx_cap = mode;
766
767 /* ETS and PFC defaults */
768 ets.ets_cap = 8;
769 pfc.pfc_cap = 8;
770
771 if (mode & DCB_CAP_DCBX_VER_IEEE) {
772 ixgbe_dcbnl_ieee_setets(dev, &ets);
773 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
774 } else if (mode & DCB_CAP_DCBX_VER_CEE) {
775 adapter->dcb_set_bitmap |= (BIT_PFC & BIT_PG_TX & BIT_PG_RX);
776 ixgbe_dcbnl_set_all(dev);
777 } else {
778 /* Drop into single TC mode strict priority as this
779 * indicates CEE and IEEE versions are disabled
780 */
781 ixgbe_dcbnl_ieee_setets(dev, &ets);
782 ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
783 ixgbe_dcbnl_set_state(dev, 0);
784 }
785
786 return 0;
787 }
788
789 const struct dcbnl_rtnl_ops dcbnl_ops = {
790 .ieee_getets = ixgbe_dcbnl_ieee_getets,
791 .ieee_setets = ixgbe_dcbnl_ieee_setets,
792 .ieee_getpfc = ixgbe_dcbnl_ieee_getpfc,
793 .ieee_setpfc = ixgbe_dcbnl_ieee_setpfc,
794 .ieee_setapp = ixgbe_dcbnl_ieee_setapp,
795 .getstate = ixgbe_dcbnl_get_state,
796 .setstate = ixgbe_dcbnl_set_state,
797 .getpermhwaddr = ixgbe_dcbnl_get_perm_hw_addr,
798 .setpgtccfgtx = ixgbe_dcbnl_set_pg_tc_cfg_tx,
799 .setpgbwgcfgtx = ixgbe_dcbnl_set_pg_bwg_cfg_tx,
800 .setpgtccfgrx = ixgbe_dcbnl_set_pg_tc_cfg_rx,
801 .setpgbwgcfgrx = ixgbe_dcbnl_set_pg_bwg_cfg_rx,
802 .getpgtccfgtx = ixgbe_dcbnl_get_pg_tc_cfg_tx,
803 .getpgbwgcfgtx = ixgbe_dcbnl_get_pg_bwg_cfg_tx,
804 .getpgtccfgrx = ixgbe_dcbnl_get_pg_tc_cfg_rx,
805 .getpgbwgcfgrx = ixgbe_dcbnl_get_pg_bwg_cfg_rx,
806 .setpfccfg = ixgbe_dcbnl_set_pfc_cfg,
807 .getpfccfg = ixgbe_dcbnl_get_pfc_cfg,
808 .setall = ixgbe_dcbnl_set_all,
809 .getcap = ixgbe_dcbnl_getcap,
810 .getnumtcs = ixgbe_dcbnl_getnumtcs,
811 .setnumtcs = ixgbe_dcbnl_setnumtcs,
812 .getpfcstate = ixgbe_dcbnl_getpfcstate,
813 .setpfcstate = ixgbe_dcbnl_setpfcstate,
814 .getapp = ixgbe_dcbnl_getapp,
815 .setapp = ixgbe_dcbnl_setapp,
816 .getdcbx = ixgbe_dcbnl_getdcbx,
817 .setdcbx = ixgbe_dcbnl_setdcbx,
818 };
Linux kernel - Deliverables
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