1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
3 
4 #include "ixgbe.h"
5 #include <linux/dcbnl.h>
6 #include "ixgbe_dcb_82598.h"
7 #include "ixgbe_dcb_82599.h"
8 #include "ixgbe_sriov.h"
9 
10 /* Callbacks for DCB netlink in the kernel */
11 #define BIT_PFC		0x02
12 #define BIT_PG_RX	0x04
13 #define BIT_PG_TX	0x08
14 #define BIT_APP_UPCHG	0x10
15 
16 /* Responses for the DCB_C_SET_ALL command */
17 #define DCB_HW_CHG_RST  0  /* DCB configuration changed with reset */
18 #define DCB_NO_HW_CHG   1  /* DCB configuration did not change */
19 #define DCB_HW_CHG      2  /* DCB configuration changed, no reset */
20 
ixgbe_copy_dcb_cfg(struct ixgbe_adapter * adapter,int tc_max)21 static int ixgbe_copy_dcb_cfg(struct ixgbe_adapter *adapter, int tc_max)
22 {
23 	struct ixgbe_dcb_config *scfg = &adapter->temp_dcb_cfg;
24 	struct ixgbe_dcb_config *dcfg = &adapter->dcb_cfg;
25 	struct tc_configuration *src = NULL;
26 	struct tc_configuration *dst = NULL;
27 	int i, j;
28 	int tx = DCB_TX_CONFIG;
29 	int rx = DCB_RX_CONFIG;
30 	int changes = 0;
31 #ifdef IXGBE_FCOE
32 	struct dcb_app app = {
33 			      .selector = DCB_APP_IDTYPE_ETHTYPE,
34 			      .protocol = ETH_P_FCOE,
35 			     };
36 	u8 up = dcb_getapp(adapter->netdev, &app);
37 
38 	if (up && !(up & BIT(adapter->fcoe.up)))
39 		changes |= BIT_APP_UPCHG;
40 #endif
41 
42 	for (i = DCB_PG_ATTR_TC_0; i < tc_max + DCB_PG_ATTR_TC_0; i++) {
43 		src = &scfg->tc_config[i - DCB_PG_ATTR_TC_0];
44 		dst = &dcfg->tc_config[i - DCB_PG_ATTR_TC_0];
45 
46 		if (dst->path[tx].prio_type != src->path[tx].prio_type) {
47 			dst->path[tx].prio_type = src->path[tx].prio_type;
48 			changes |= BIT_PG_TX;
49 		}
50 
51 		if (dst->path[tx].bwg_id != src->path[tx].bwg_id) {
52 			dst->path[tx].bwg_id = src->path[tx].bwg_id;
53 			changes |= BIT_PG_TX;
54 		}
55 
56 		if (dst->path[tx].bwg_percent != src->path[tx].bwg_percent) {
57 			dst->path[tx].bwg_percent = src->path[tx].bwg_percent;
58 			changes |= BIT_PG_TX;
59 		}
60 
61 		if (dst->path[tx].up_to_tc_bitmap !=
62 				src->path[tx].up_to_tc_bitmap) {
63 			dst->path[tx].up_to_tc_bitmap =
64 				src->path[tx].up_to_tc_bitmap;
65 			changes |= (BIT_PG_TX | BIT_PFC | BIT_APP_UPCHG);
66 		}
67 
68 		if (dst->path[rx].prio_type != src->path[rx].prio_type) {
69 			dst->path[rx].prio_type = src->path[rx].prio_type;
70 			changes |= BIT_PG_RX;
71 		}
72 
73 		if (dst->path[rx].bwg_id != src->path[rx].bwg_id) {
74 			dst->path[rx].bwg_id = src->path[rx].bwg_id;
75 			changes |= BIT_PG_RX;
76 		}
77 
78 		if (dst->path[rx].bwg_percent != src->path[rx].bwg_percent) {
79 			dst->path[rx].bwg_percent = src->path[rx].bwg_percent;
80 			changes |= BIT_PG_RX;
81 		}
82 
83 		if (dst->path[rx].up_to_tc_bitmap !=
84 				src->path[rx].up_to_tc_bitmap) {
85 			dst->path[rx].up_to_tc_bitmap =
86 				src->path[rx].up_to_tc_bitmap;
87 			changes |= (BIT_PG_RX | BIT_PFC | BIT_APP_UPCHG);
88 		}
89 	}
90 
91 	for (i = DCB_PG_ATTR_BW_ID_0; i < DCB_PG_ATTR_BW_ID_MAX; i++) {
92 		j = i - DCB_PG_ATTR_BW_ID_0;
93 		if (dcfg->bw_percentage[tx][j] != scfg->bw_percentage[tx][j]) {
94 			dcfg->bw_percentage[tx][j] = scfg->bw_percentage[tx][j];
95 			changes |= BIT_PG_TX;
96 		}
97 		if (dcfg->bw_percentage[rx][j] != scfg->bw_percentage[rx][j]) {
98 			dcfg->bw_percentage[rx][j] = scfg->bw_percentage[rx][j];
99 			changes |= BIT_PG_RX;
100 		}
101 	}
102 
103 	for (i = DCB_PFC_UP_ATTR_0; i < DCB_PFC_UP_ATTR_MAX; i++) {
104 		j = i - DCB_PFC_UP_ATTR_0;
105 		if (dcfg->tc_config[j].dcb_pfc != scfg->tc_config[j].dcb_pfc) {
106 			dcfg->tc_config[j].dcb_pfc = scfg->tc_config[j].dcb_pfc;
107 			changes |= BIT_PFC;
108 		}
109 	}
110 
111 	if (dcfg->pfc_mode_enable != scfg->pfc_mode_enable) {
112 		dcfg->pfc_mode_enable = scfg->pfc_mode_enable;
113 		changes |= BIT_PFC;
114 	}
115 
116 	return changes;
117 }
118 
ixgbe_dcbnl_get_state(struct net_device * netdev)119 static u8 ixgbe_dcbnl_get_state(struct net_device *netdev)
120 {
121 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
122 
123 	return !!(adapter->flags & IXGBE_FLAG_DCB_ENABLED);
124 }
125 
ixgbe_dcbnl_set_state(struct net_device * netdev,u8 state)126 static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
127 {
128 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
129 
130 	/* Fail command if not in CEE mode */
131 	if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
132 		return 1;
133 
134 	/* verify there is something to do, if not then exit */
135 	if (!state == !(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
136 		return 0;
137 
138 	return !!ixgbe_setup_tc(netdev,
139 				state ? adapter->dcb_cfg.num_tcs.pg_tcs : 0);
140 }
141 
ixgbe_dcbnl_get_perm_hw_addr(struct net_device * netdev,u8 * perm_addr)142 static void ixgbe_dcbnl_get_perm_hw_addr(struct net_device *netdev,
143 					 u8 *perm_addr)
144 {
145 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
146 	int i, j;
147 
148 	memset(perm_addr, 0xff, MAX_ADDR_LEN);
149 
150 	for (i = 0; i < netdev->addr_len; i++)
151 		perm_addr[i] = adapter->hw.mac.perm_addr[i];
152 
153 	switch (adapter->hw.mac.type) {
154 	case ixgbe_mac_82599EB:
155 	case ixgbe_mac_X540:
156 	case ixgbe_mac_X550:
157 		for (j = 0; j < netdev->addr_len; j++, i++)
158 			perm_addr[i] = adapter->hw.mac.san_addr[j];
159 		break;
160 	default:
161 		break;
162 	}
163 }
164 
ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device * netdev,int tc,u8 prio,u8 bwg_id,u8 bw_pct,u8 up_map)165 static void ixgbe_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
166 					 u8 prio, u8 bwg_id, u8 bw_pct,
167 					 u8 up_map)
168 {
169 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
170 
171 	if (prio != DCB_ATTR_VALUE_UNDEFINED)
172 		adapter->temp_dcb_cfg.tc_config[tc].path[0].prio_type = prio;
173 	if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
174 		adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_id = bwg_id;
175 	if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
176 		adapter->temp_dcb_cfg.tc_config[tc].path[0].bwg_percent =
177 			bw_pct;
178 	if (up_map != DCB_ATTR_VALUE_UNDEFINED)
179 		adapter->temp_dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap =
180 			up_map;
181 }
182 
ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device * netdev,int bwg_id,u8 bw_pct)183 static void ixgbe_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
184 					  u8 bw_pct)
185 {
186 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
187 
188 	adapter->temp_dcb_cfg.bw_percentage[0][bwg_id] = bw_pct;
189 }
190 
ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device * netdev,int tc,u8 prio,u8 bwg_id,u8 bw_pct,u8 up_map)191 static void ixgbe_dcbnl_set_pg_tc_cfg_rx(struct net_device *netdev, int tc,
192 					 u8 prio, u8 bwg_id, u8 bw_pct,
193 					 u8 up_map)
194 {
195 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
196 
197 	if (prio != DCB_ATTR_VALUE_UNDEFINED)
198 		adapter->temp_dcb_cfg.tc_config[tc].path[1].prio_type = prio;
199 	if (bwg_id != DCB_ATTR_VALUE_UNDEFINED)
200 		adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_id = bwg_id;
201 	if (bw_pct != DCB_ATTR_VALUE_UNDEFINED)
202 		adapter->temp_dcb_cfg.tc_config[tc].path[1].bwg_percent =
203 			bw_pct;
204 	if (up_map != DCB_ATTR_VALUE_UNDEFINED)
205 		adapter->temp_dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap =
206 			up_map;
207 }
208 
ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device * netdev,int bwg_id,u8 bw_pct)209 static void ixgbe_dcbnl_set_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
210 					  u8 bw_pct)
211 {
212 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
213 
214 	adapter->temp_dcb_cfg.bw_percentage[1][bwg_id] = bw_pct;
215 }
216 
ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device * netdev,int tc,u8 * prio,u8 * bwg_id,u8 * bw_pct,u8 * up_map)217 static void ixgbe_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int tc,
218 					 u8 *prio, u8 *bwg_id, u8 *bw_pct,
219 					 u8 *up_map)
220 {
221 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
222 
223 	*prio = adapter->dcb_cfg.tc_config[tc].path[0].prio_type;
224 	*bwg_id = adapter->dcb_cfg.tc_config[tc].path[0].bwg_id;
225 	*bw_pct = adapter->dcb_cfg.tc_config[tc].path[0].bwg_percent;
226 	*up_map = adapter->dcb_cfg.tc_config[tc].path[0].up_to_tc_bitmap;
227 }
228 
ixgbe_dcbnl_get_pg_bwg_cfg_tx(struct net_device * netdev,int bwg_id,u8 * bw_pct)229 static void ixgbe_dcbnl_get_pg_bwg_cfg_tx(struct net_device *netdev, int bwg_id,
230 					  u8 *bw_pct)
231 {
232 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
233 
234 	*bw_pct = adapter->dcb_cfg.bw_percentage[0][bwg_id];
235 }
236 
ixgbe_dcbnl_get_pg_tc_cfg_rx(struct net_device * netdev,int tc,u8 * prio,u8 * bwg_id,u8 * bw_pct,u8 * up_map)237 static void ixgbe_dcbnl_get_pg_tc_cfg_rx(struct net_device *netdev, int tc,
238 					 u8 *prio, u8 *bwg_id, u8 *bw_pct,
239 					 u8 *up_map)
240 {
241 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
242 
243 	*prio = adapter->dcb_cfg.tc_config[tc].path[1].prio_type;
244 	*bwg_id = adapter->dcb_cfg.tc_config[tc].path[1].bwg_id;
245 	*bw_pct = adapter->dcb_cfg.tc_config[tc].path[1].bwg_percent;
246 	*up_map = adapter->dcb_cfg.tc_config[tc].path[1].up_to_tc_bitmap;
247 }
248 
ixgbe_dcbnl_get_pg_bwg_cfg_rx(struct net_device * netdev,int bwg_id,u8 * bw_pct)249 static void ixgbe_dcbnl_get_pg_bwg_cfg_rx(struct net_device *netdev, int bwg_id,
250 					  u8 *bw_pct)
251 {
252 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
253 
254 	*bw_pct = adapter->dcb_cfg.bw_percentage[1][bwg_id];
255 }
256 
ixgbe_dcbnl_set_pfc_cfg(struct net_device * netdev,int priority,u8 setting)257 static void ixgbe_dcbnl_set_pfc_cfg(struct net_device *netdev, int priority,
258 				    u8 setting)
259 {
260 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
261 
262 	adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc = setting;
263 	if (adapter->temp_dcb_cfg.tc_config[priority].dcb_pfc !=
264 	    adapter->dcb_cfg.tc_config[priority].dcb_pfc)
265 		adapter->temp_dcb_cfg.pfc_mode_enable = true;
266 }
267 
ixgbe_dcbnl_get_pfc_cfg(struct net_device * netdev,int priority,u8 * setting)268 static void ixgbe_dcbnl_get_pfc_cfg(struct net_device *netdev, int priority,
269 				    u8 *setting)
270 {
271 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
272 
273 	*setting = adapter->dcb_cfg.tc_config[priority].dcb_pfc;
274 }
275 
ixgbe_dcbnl_devreset(struct net_device * dev)276 static void ixgbe_dcbnl_devreset(struct net_device *dev)
277 {
278 	struct ixgbe_adapter *adapter = netdev_priv(dev);
279 
280 	while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
281 		usleep_range(1000, 2000);
282 
283 	if (netif_running(dev))
284 		dev->netdev_ops->ndo_stop(dev);
285 
286 	ixgbe_clear_interrupt_scheme(adapter);
287 	ixgbe_init_interrupt_scheme(adapter);
288 
289 	if (netif_running(dev))
290 		dev->netdev_ops->ndo_open(dev);
291 
292 	clear_bit(__IXGBE_RESETTING, &adapter->state);
293 }
294 
ixgbe_dcbnl_set_all(struct net_device * netdev)295 static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
296 {
297 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
298 	struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
299 	struct ixgbe_hw *hw = &adapter->hw;
300 	int ret = DCB_NO_HW_CHG;
301 	int i;
302 
303 	/* Fail command if not in CEE mode */
304 	if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
305 		return DCB_NO_HW_CHG;
306 
307 	adapter->dcb_set_bitmap |= ixgbe_copy_dcb_cfg(adapter,
308 						      MAX_TRAFFIC_CLASS);
309 	if (!adapter->dcb_set_bitmap)
310 		return DCB_NO_HW_CHG;
311 
312 	if (adapter->dcb_set_bitmap & (BIT_PG_TX|BIT_PG_RX)) {
313 		u16 refill[MAX_TRAFFIC_CLASS], max[MAX_TRAFFIC_CLASS];
314 		u8 bwg_id[MAX_TRAFFIC_CLASS], prio_type[MAX_TRAFFIC_CLASS];
315 		/* Priority to TC mapping in CEE case default to 1:1 */
316 		u8 prio_tc[MAX_USER_PRIORITY];
317 		int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
318 
319 #ifdef IXGBE_FCOE
320 		if (adapter->netdev->features & NETIF_F_FCOE_MTU)
321 			max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
322 #endif
323 
324 		ixgbe_dcb_calculate_tc_credits(hw, dcb_cfg, max_frame,
325 					       DCB_TX_CONFIG);
326 		ixgbe_dcb_calculate_tc_credits(hw, dcb_cfg, max_frame,
327 					       DCB_RX_CONFIG);
328 
329 		ixgbe_dcb_unpack_refill(dcb_cfg, DCB_TX_CONFIG, refill);
330 		ixgbe_dcb_unpack_max(dcb_cfg, max);
331 		ixgbe_dcb_unpack_bwgid(dcb_cfg, DCB_TX_CONFIG, bwg_id);
332 		ixgbe_dcb_unpack_prio(dcb_cfg, DCB_TX_CONFIG, prio_type);
333 		ixgbe_dcb_unpack_map(dcb_cfg, DCB_TX_CONFIG, prio_tc);
334 
335 		ixgbe_dcb_hw_ets_config(hw, refill, max, bwg_id,
336 					prio_type, prio_tc);
337 
338 		for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
339 			netdev_set_prio_tc_map(netdev, i, prio_tc[i]);
340 
341 		ret = DCB_HW_CHG_RST;
342 	}
343 
344 	if (adapter->dcb_set_bitmap & BIT_PFC) {
345 		if (dcb_cfg->pfc_mode_enable) {
346 			u8 pfc_en;
347 			u8 prio_tc[MAX_USER_PRIORITY];
348 
349 			ixgbe_dcb_unpack_map(dcb_cfg, DCB_TX_CONFIG, prio_tc);
350 			ixgbe_dcb_unpack_pfc(dcb_cfg, &pfc_en);
351 			ixgbe_dcb_hw_pfc_config(hw, pfc_en, prio_tc);
352 		} else {
353 			hw->mac.ops.fc_enable(hw);
354 		}
355 
356 		ixgbe_set_rx_drop_en(adapter);
357 
358 		ret = DCB_HW_CHG;
359 	}
360 
361 #ifdef IXGBE_FCOE
362 	/* Reprogram FCoE hardware offloads when the traffic class
363 	 * FCoE is using changes. This happens if the APP info
364 	 * changes or the up2tc mapping is updated.
365 	 */
366 	if (adapter->dcb_set_bitmap & BIT_APP_UPCHG) {
367 		struct dcb_app app = {
368 				      .selector = DCB_APP_IDTYPE_ETHTYPE,
369 				      .protocol = ETH_P_FCOE,
370 				     };
371 		u8 up = dcb_getapp(netdev, &app);
372 
373 		adapter->fcoe.up = ffs(up) - 1;
374 		ixgbe_dcbnl_devreset(netdev);
375 		ret = DCB_HW_CHG_RST;
376 	}
377 #endif
378 
379 	adapter->dcb_set_bitmap = 0x00;
380 	return ret;
381 }
382 
ixgbe_dcbnl_getcap(struct net_device * netdev,int capid,u8 * cap)383 static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
384 {
385 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
386 
387 	switch (capid) {
388 	case DCB_CAP_ATTR_PG:
389 		*cap = true;
390 		break;
391 	case DCB_CAP_ATTR_PFC:
392 		*cap = true;
393 		break;
394 	case DCB_CAP_ATTR_UP2TC:
395 		*cap = false;
396 		break;
397 	case DCB_CAP_ATTR_PG_TCS:
398 		*cap = 0x80;
399 		break;
400 	case DCB_CAP_ATTR_PFC_TCS:
401 		*cap = 0x80;
402 		break;
403 	case DCB_CAP_ATTR_GSP:
404 		*cap = true;
405 		break;
406 	case DCB_CAP_ATTR_BCN:
407 		*cap = false;
408 		break;
409 	case DCB_CAP_ATTR_DCBX:
410 		*cap = adapter->dcbx_cap;
411 		break;
412 	default:
413 		*cap = false;
414 		break;
415 	}
416 
417 	return 0;
418 }
419 
ixgbe_dcbnl_getnumtcs(struct net_device * netdev,int tcid,u8 * num)420 static int ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
421 {
422 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
423 
424 	if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
425 		switch (tcid) {
426 		case DCB_NUMTCS_ATTR_PG:
427 			*num = adapter->dcb_cfg.num_tcs.pg_tcs;
428 			break;
429 		case DCB_NUMTCS_ATTR_PFC:
430 			*num = adapter->dcb_cfg.num_tcs.pfc_tcs;
431 			break;
432 		default:
433 			return -EINVAL;
434 		}
435 	} else {
436 		return -EINVAL;
437 	}
438 
439 	return 0;
440 }
441 
ixgbe_dcbnl_setnumtcs(struct net_device * netdev,int tcid,u8 num)442 static int ixgbe_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)
443 {
444 	return -EINVAL;
445 }
446 
ixgbe_dcbnl_getpfcstate(struct net_device * netdev)447 static u8 ixgbe_dcbnl_getpfcstate(struct net_device *netdev)
448 {
449 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
450 
451 	return adapter->dcb_cfg.pfc_mode_enable;
452 }
453 
ixgbe_dcbnl_setpfcstate(struct net_device * netdev,u8 state)454 static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
455 {
456 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
457 
458 	adapter->temp_dcb_cfg.pfc_mode_enable = state;
459 }
460 
461 /**
462  * ixgbe_dcbnl_getapp - retrieve the DCBX application user priority
463  * @netdev : the corresponding netdev
464  * @idtype : identifies the id as ether type or TCP/UDP port number
465  * @id: id is either ether type or TCP/UDP port number
466  *
467  * Returns : on success, returns a non-zero 802.1p user priority bitmap
468  * otherwise returns -EINVAL as the invalid user priority bitmap to indicate an
469  * error.
470  */
ixgbe_dcbnl_getapp(struct net_device * netdev,u8 idtype,u16 id)471 static int ixgbe_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
472 {
473 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
474 	struct dcb_app app = {
475 				.selector = idtype,
476 				.protocol = id,
477 			     };
478 
479 	if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
480 		return -EINVAL;
481 
482 	return dcb_getapp(netdev, &app);
483 }
484 
ixgbe_dcbnl_ieee_getets(struct net_device * dev,struct ieee_ets * ets)485 static int ixgbe_dcbnl_ieee_getets(struct net_device *dev,
486 				   struct ieee_ets *ets)
487 {
488 	struct ixgbe_adapter *adapter = netdev_priv(dev);
489 	struct ieee_ets *my_ets = adapter->ixgbe_ieee_ets;
490 
491 	ets->ets_cap = adapter->dcb_cfg.num_tcs.pg_tcs;
492 
493 	/* No IEEE PFC settings available */
494 	if (!my_ets)
495 		return 0;
496 
497 	ets->cbs = my_ets->cbs;
498 	memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
499 	memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
500 	memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
501 	memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
502 	return 0;
503 }
504 
ixgbe_dcbnl_ieee_setets(struct net_device * dev,struct ieee_ets * ets)505 static int ixgbe_dcbnl_ieee_setets(struct net_device *dev,
506 				   struct ieee_ets *ets)
507 {
508 	struct ixgbe_adapter *adapter = netdev_priv(dev);
509 	int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
510 	int i, err;
511 	__u8 max_tc = 0;
512 	__u8 map_chg = 0;
513 
514 	if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
515 		return -EINVAL;
516 
517 	if (!adapter->ixgbe_ieee_ets) {
518 		adapter->ixgbe_ieee_ets = kmalloc(sizeof(struct ieee_ets),
519 						  GFP_KERNEL);
520 		if (!adapter->ixgbe_ieee_ets)
521 			return -ENOMEM;
522 
523 		/* initialize UP2TC mappings to invalid value */
524 		for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
525 			adapter->ixgbe_ieee_ets->prio_tc[i] =
526 				IEEE_8021QAZ_MAX_TCS;
527 		/* if possible update UP2TC mappings from HW */
528 		ixgbe_dcb_read_rtrup2tc(&adapter->hw,
529 					adapter->ixgbe_ieee_ets->prio_tc);
530 	}
531 
532 	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
533 		if (ets->prio_tc[i] > max_tc)
534 			max_tc = ets->prio_tc[i];
535 		if (ets->prio_tc[i] != adapter->ixgbe_ieee_ets->prio_tc[i])
536 			map_chg = 1;
537 	}
538 
539 	memcpy(adapter->ixgbe_ieee_ets, ets, sizeof(*adapter->ixgbe_ieee_ets));
540 
541 	if (max_tc)
542 		max_tc++;
543 
544 	if (max_tc > adapter->dcb_cfg.num_tcs.pg_tcs)
545 		return -EINVAL;
546 
547 	if (max_tc != adapter->hw_tcs) {
548 		err = ixgbe_setup_tc(dev, max_tc);
549 		if (err)
550 			return err;
551 	} else if (map_chg) {
552 		ixgbe_dcbnl_devreset(dev);
553 	}
554 
555 	return ixgbe_dcb_hw_ets(&adapter->hw, ets, max_frame);
556 }
557 
ixgbe_dcbnl_ieee_getpfc(struct net_device * dev,struct ieee_pfc * pfc)558 static int ixgbe_dcbnl_ieee_getpfc(struct net_device *dev,
559 				   struct ieee_pfc *pfc)
560 {
561 	struct ixgbe_adapter *adapter = netdev_priv(dev);
562 	struct ieee_pfc *my_pfc = adapter->ixgbe_ieee_pfc;
563 	int i;
564 
565 	pfc->pfc_cap = adapter->dcb_cfg.num_tcs.pfc_tcs;
566 
567 	/* No IEEE PFC settings available */
568 	if (!my_pfc)
569 		return 0;
570 
571 	pfc->pfc_en = my_pfc->pfc_en;
572 	pfc->mbc = my_pfc->mbc;
573 	pfc->delay = my_pfc->delay;
574 
575 	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
576 		pfc->requests[i] = adapter->stats.pxoffrxc[i];
577 		pfc->indications[i] = adapter->stats.pxofftxc[i];
578 	}
579 
580 	return 0;
581 }
582 
ixgbe_dcbnl_ieee_setpfc(struct net_device * dev,struct ieee_pfc * pfc)583 static int ixgbe_dcbnl_ieee_setpfc(struct net_device *dev,
584 				   struct ieee_pfc *pfc)
585 {
586 	struct ixgbe_adapter *adapter = netdev_priv(dev);
587 	struct ixgbe_hw *hw = &adapter->hw;
588 	u8 *prio_tc;
589 	int err;
590 
591 	if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
592 		return -EINVAL;
593 
594 	if (!adapter->ixgbe_ieee_pfc) {
595 		adapter->ixgbe_ieee_pfc = kmalloc(sizeof(struct ieee_pfc),
596 						  GFP_KERNEL);
597 		if (!adapter->ixgbe_ieee_pfc)
598 			return -ENOMEM;
599 	}
600 
601 	prio_tc = adapter->ixgbe_ieee_ets->prio_tc;
602 	memcpy(adapter->ixgbe_ieee_pfc, pfc, sizeof(*adapter->ixgbe_ieee_pfc));
603 
604 	/* Enable link flow control parameters if PFC is disabled */
605 	if (pfc->pfc_en)
606 		err = ixgbe_dcb_hw_pfc_config(hw, pfc->pfc_en, prio_tc);
607 	else
608 		err = hw->mac.ops.fc_enable(hw);
609 
610 	ixgbe_set_rx_drop_en(adapter);
611 
612 	return err;
613 }
614 
ixgbe_dcbnl_ieee_setapp(struct net_device * dev,struct dcb_app * app)615 static int ixgbe_dcbnl_ieee_setapp(struct net_device *dev,
616 				   struct dcb_app *app)
617 {
618 	struct ixgbe_adapter *adapter = netdev_priv(dev);
619 	int err;
620 
621 	if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
622 		return -EINVAL;
623 
624 	err = dcb_ieee_setapp(dev, app);
625 	if (err)
626 		return err;
627 
628 #ifdef IXGBE_FCOE
629 	if (app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
630 	    app->protocol == ETH_P_FCOE) {
631 		u8 app_mask = dcb_ieee_getapp_mask(dev, app);
632 
633 		if (app_mask & BIT(adapter->fcoe.up))
634 			return 0;
635 
636 		adapter->fcoe.up = app->priority;
637 		ixgbe_dcbnl_devreset(dev);
638 	}
639 #endif
640 
641 	/* VF devices should use default UP when available */
642 	if (app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
643 	    app->protocol == 0) {
644 		int vf;
645 
646 		adapter->default_up = app->priority;
647 
648 		for (vf = 0; vf < adapter->num_vfs; vf++) {
649 			struct vf_data_storage *vfinfo = &adapter->vfinfo[vf];
650 
651 			if (!vfinfo->pf_qos)
652 				ixgbe_set_vmvir(adapter, vfinfo->pf_vlan,
653 						app->priority, vf);
654 		}
655 	}
656 
657 	return 0;
658 }
659 
ixgbe_dcbnl_ieee_delapp(struct net_device * dev,struct dcb_app * app)660 static int ixgbe_dcbnl_ieee_delapp(struct net_device *dev,
661 				   struct dcb_app *app)
662 {
663 	struct ixgbe_adapter *adapter = netdev_priv(dev);
664 	int err;
665 
666 	if (!(adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
667 		return -EINVAL;
668 
669 	err = dcb_ieee_delapp(dev, app);
670 
671 #ifdef IXGBE_FCOE
672 	if (!err && app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
673 	    app->protocol == ETH_P_FCOE) {
674 		u8 app_mask = dcb_ieee_getapp_mask(dev, app);
675 
676 		if (app_mask & BIT(adapter->fcoe.up))
677 			return 0;
678 
679 		adapter->fcoe.up = app_mask ?
680 				   ffs(app_mask) - 1 : IXGBE_FCOE_DEFTC;
681 		ixgbe_dcbnl_devreset(dev);
682 	}
683 #endif
684 	/* IF default priority is being removed clear VF default UP */
685 	if (app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
686 	    app->protocol == 0 && adapter->default_up == app->priority) {
687 		int vf;
688 		long unsigned int app_mask = dcb_ieee_getapp_mask(dev, app);
689 		int qos = app_mask ? find_first_bit(&app_mask, 8) : 0;
690 
691 		adapter->default_up = qos;
692 
693 		for (vf = 0; vf < adapter->num_vfs; vf++) {
694 			struct vf_data_storage *vfinfo = &adapter->vfinfo[vf];
695 
696 			if (!vfinfo->pf_qos)
697 				ixgbe_set_vmvir(adapter, vfinfo->pf_vlan,
698 						qos, vf);
699 		}
700 	}
701 
702 	return err;
703 }
704 
ixgbe_dcbnl_getdcbx(struct net_device * dev)705 static u8 ixgbe_dcbnl_getdcbx(struct net_device *dev)
706 {
707 	struct ixgbe_adapter *adapter = netdev_priv(dev);
708 	return adapter->dcbx_cap;
709 }
710 
ixgbe_dcbnl_setdcbx(struct net_device * dev,u8 mode)711 static u8 ixgbe_dcbnl_setdcbx(struct net_device *dev, u8 mode)
712 {
713 	struct ixgbe_adapter *adapter = netdev_priv(dev);
714 	struct ieee_ets ets = {0};
715 	struct ieee_pfc pfc = {0};
716 	int err = 0;
717 
718 	/* no support for LLD_MANAGED modes or CEE+IEEE */
719 	if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
720 	    ((mode & DCB_CAP_DCBX_VER_IEEE) && (mode & DCB_CAP_DCBX_VER_CEE)) ||
721 	    !(mode & DCB_CAP_DCBX_HOST))
722 		return 1;
723 
724 	if (mode == adapter->dcbx_cap)
725 		return 0;
726 
727 	adapter->dcbx_cap = mode;
728 
729 	/* ETS and PFC defaults */
730 	ets.ets_cap = 8;
731 	pfc.pfc_cap = 8;
732 
733 	if (mode & DCB_CAP_DCBX_VER_IEEE) {
734 		ixgbe_dcbnl_ieee_setets(dev, &ets);
735 		ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
736 	} else if (mode & DCB_CAP_DCBX_VER_CEE) {
737 		u8 mask = BIT_PFC | BIT_PG_TX | BIT_PG_RX | BIT_APP_UPCHG;
738 
739 		adapter->dcb_set_bitmap |= mask;
740 		ixgbe_dcbnl_set_all(dev);
741 	} else {
742 		/* Drop into single TC mode strict priority as this
743 		 * indicates CEE and IEEE versions are disabled
744 		 */
745 		ixgbe_dcbnl_ieee_setets(dev, &ets);
746 		ixgbe_dcbnl_ieee_setpfc(dev, &pfc);
747 		err = ixgbe_setup_tc(dev, 0);
748 	}
749 
750 	return err ? 1 : 0;
751 }
752 
753 const struct dcbnl_rtnl_ops ixgbe_dcbnl_ops = {
754 	.ieee_getets	= ixgbe_dcbnl_ieee_getets,
755 	.ieee_setets	= ixgbe_dcbnl_ieee_setets,
756 	.ieee_getpfc	= ixgbe_dcbnl_ieee_getpfc,
757 	.ieee_setpfc	= ixgbe_dcbnl_ieee_setpfc,
758 	.ieee_setapp	= ixgbe_dcbnl_ieee_setapp,
759 	.ieee_delapp	= ixgbe_dcbnl_ieee_delapp,
760 	.getstate	= ixgbe_dcbnl_get_state,
761 	.setstate	= ixgbe_dcbnl_set_state,
762 	.getpermhwaddr	= ixgbe_dcbnl_get_perm_hw_addr,
763 	.setpgtccfgtx	= ixgbe_dcbnl_set_pg_tc_cfg_tx,
764 	.setpgbwgcfgtx	= ixgbe_dcbnl_set_pg_bwg_cfg_tx,
765 	.setpgtccfgrx	= ixgbe_dcbnl_set_pg_tc_cfg_rx,
766 	.setpgbwgcfgrx	= ixgbe_dcbnl_set_pg_bwg_cfg_rx,
767 	.getpgtccfgtx	= ixgbe_dcbnl_get_pg_tc_cfg_tx,
768 	.getpgbwgcfgtx	= ixgbe_dcbnl_get_pg_bwg_cfg_tx,
769 	.getpgtccfgrx	= ixgbe_dcbnl_get_pg_tc_cfg_rx,
770 	.getpgbwgcfgrx	= ixgbe_dcbnl_get_pg_bwg_cfg_rx,
771 	.setpfccfg	= ixgbe_dcbnl_set_pfc_cfg,
772 	.getpfccfg	= ixgbe_dcbnl_get_pfc_cfg,
773 	.setall		= ixgbe_dcbnl_set_all,
774 	.getcap		= ixgbe_dcbnl_getcap,
775 	.getnumtcs	= ixgbe_dcbnl_getnumtcs,
776 	.setnumtcs	= ixgbe_dcbnl_setnumtcs,
777 	.getpfcstate	= ixgbe_dcbnl_getpfcstate,
778 	.setpfcstate	= ixgbe_dcbnl_setpfcstate,
779 	.getapp		= ixgbe_dcbnl_getapp,
780 	.getdcbx	= ixgbe_dcbnl_getdcbx,
781 	.setdcbx	= ixgbe_dcbnl_setdcbx,
782 };
783