xref: /linux/drivers/net/vmxnet3/vmxnet3_ethtool.c (revision 3ce095c16263630dde46d6051854073edaacf3d7)
1 /*
2  * Linux driver for VMware's vmxnet3 ethernet NIC.
3  *
4  * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License as published by the
8  * Free Software Foundation; version 2 of the License and no later version.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13  * NON INFRINGEMENT.  See the GNU General Public License for more
14  * details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19  *
20  * The full GNU General Public License is included in this distribution in
21  * the file called "COPYING".
22  *
23  * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
24  *
25  */
26 
27 
28 #include "vmxnet3_int.h"
29 
30 struct vmxnet3_stat_desc {
31 	char desc[ETH_GSTRING_LEN];
32 	int  offset;
33 };
34 
35 
36 /* per tq stats maintained by the device */
37 static const struct vmxnet3_stat_desc
38 vmxnet3_tq_dev_stats[] = {
39 	/* description,         offset */
40 	{ "Tx Queue#",        0 },
41 	{ "  TSO pkts tx",	offsetof(struct UPT1_TxStats, TSOPktsTxOK) },
42 	{ "  TSO bytes tx",	offsetof(struct UPT1_TxStats, TSOBytesTxOK) },
43 	{ "  ucast pkts tx",	offsetof(struct UPT1_TxStats, ucastPktsTxOK) },
44 	{ "  ucast bytes tx",	offsetof(struct UPT1_TxStats, ucastBytesTxOK) },
45 	{ "  mcast pkts tx",	offsetof(struct UPT1_TxStats, mcastPktsTxOK) },
46 	{ "  mcast bytes tx",	offsetof(struct UPT1_TxStats, mcastBytesTxOK) },
47 	{ "  bcast pkts tx",	offsetof(struct UPT1_TxStats, bcastPktsTxOK) },
48 	{ "  bcast bytes tx",	offsetof(struct UPT1_TxStats, bcastBytesTxOK) },
49 	{ "  pkts tx err",	offsetof(struct UPT1_TxStats, pktsTxError) },
50 	{ "  pkts tx discard",	offsetof(struct UPT1_TxStats, pktsTxDiscard) },
51 };
52 
53 /* per tq stats maintained by the driver */
54 static const struct vmxnet3_stat_desc
55 vmxnet3_tq_driver_stats[] = {
56 	/* description,         offset */
57 	{"  drv dropped tx total",	offsetof(struct vmxnet3_tq_driver_stats,
58 						 drop_total) },
59 	{ "     too many frags", offsetof(struct vmxnet3_tq_driver_stats,
60 					  drop_too_many_frags) },
61 	{ "     giant hdr",	offsetof(struct vmxnet3_tq_driver_stats,
62 					 drop_oversized_hdr) },
63 	{ "     hdr err",	offsetof(struct vmxnet3_tq_driver_stats,
64 					 drop_hdr_inspect_err) },
65 	{ "     tso",		offsetof(struct vmxnet3_tq_driver_stats,
66 					 drop_tso) },
67 	{ "  ring full",	offsetof(struct vmxnet3_tq_driver_stats,
68 					 tx_ring_full) },
69 	{ "  pkts linearized",	offsetof(struct vmxnet3_tq_driver_stats,
70 					 linearized) },
71 	{ "  hdr cloned",	offsetof(struct vmxnet3_tq_driver_stats,
72 					 copy_skb_header) },
73 	{ "  giant hdr",	offsetof(struct vmxnet3_tq_driver_stats,
74 					 oversized_hdr) },
75 };
76 
77 /* per rq stats maintained by the device */
78 static const struct vmxnet3_stat_desc
79 vmxnet3_rq_dev_stats[] = {
80 	{ "Rx Queue#",        0 },
81 	{ "  LRO pkts rx",	offsetof(struct UPT1_RxStats, LROPktsRxOK) },
82 	{ "  LRO byte rx",	offsetof(struct UPT1_RxStats, LROBytesRxOK) },
83 	{ "  ucast pkts rx",	offsetof(struct UPT1_RxStats, ucastPktsRxOK) },
84 	{ "  ucast bytes rx",	offsetof(struct UPT1_RxStats, ucastBytesRxOK) },
85 	{ "  mcast pkts rx",	offsetof(struct UPT1_RxStats, mcastPktsRxOK) },
86 	{ "  mcast bytes rx",	offsetof(struct UPT1_RxStats, mcastBytesRxOK) },
87 	{ "  bcast pkts rx",	offsetof(struct UPT1_RxStats, bcastPktsRxOK) },
88 	{ "  bcast bytes rx",	offsetof(struct UPT1_RxStats, bcastBytesRxOK) },
89 	{ "  pkts rx OOB",	offsetof(struct UPT1_RxStats, pktsRxOutOfBuf) },
90 	{ "  pkts rx err",	offsetof(struct UPT1_RxStats, pktsRxError) },
91 };
92 
93 /* per rq stats maintained by the driver */
94 static const struct vmxnet3_stat_desc
95 vmxnet3_rq_driver_stats[] = {
96 	/* description,         offset */
97 	{ "  drv dropped rx total", offsetof(struct vmxnet3_rq_driver_stats,
98 					     drop_total) },
99 	{ "     err",		offsetof(struct vmxnet3_rq_driver_stats,
100 					 drop_err) },
101 	{ "     fcs",		offsetof(struct vmxnet3_rq_driver_stats,
102 					 drop_fcs) },
103 	{ "  rx buf alloc fail", offsetof(struct vmxnet3_rq_driver_stats,
104 					  rx_buf_alloc_failure) },
105 };
106 
107 /* global stats maintained by the driver */
108 static const struct vmxnet3_stat_desc
109 vmxnet3_global_stats[] = {
110 	/* description,         offset */
111 	{ "tx timeout count",	offsetof(struct vmxnet3_adapter,
112 					 tx_timeout_count) }
113 };
114 
115 
116 struct rtnl_link_stats64 *
117 vmxnet3_get_stats64(struct net_device *netdev,
118 		   struct rtnl_link_stats64 *stats)
119 {
120 	struct vmxnet3_adapter *adapter;
121 	struct vmxnet3_tq_driver_stats *drvTxStats;
122 	struct vmxnet3_rq_driver_stats *drvRxStats;
123 	struct UPT1_TxStats *devTxStats;
124 	struct UPT1_RxStats *devRxStats;
125 	unsigned long flags;
126 	int i;
127 
128 	adapter = netdev_priv(netdev);
129 
130 	/* Collect the dev stats into the shared area */
131 	spin_lock_irqsave(&adapter->cmd_lock, flags);
132 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
133 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
134 
135 	for (i = 0; i < adapter->num_tx_queues; i++) {
136 		devTxStats = &adapter->tqd_start[i].stats;
137 		drvTxStats = &adapter->tx_queue[i].stats;
138 		stats->tx_packets += devTxStats->ucastPktsTxOK +
139 				     devTxStats->mcastPktsTxOK +
140 				     devTxStats->bcastPktsTxOK;
141 		stats->tx_bytes += devTxStats->ucastBytesTxOK +
142 				   devTxStats->mcastBytesTxOK +
143 				   devTxStats->bcastBytesTxOK;
144 		stats->tx_errors += devTxStats->pktsTxError;
145 		stats->tx_dropped += drvTxStats->drop_total;
146 	}
147 
148 	for (i = 0; i < adapter->num_rx_queues; i++) {
149 		devRxStats = &adapter->rqd_start[i].stats;
150 		drvRxStats = &adapter->rx_queue[i].stats;
151 		stats->rx_packets += devRxStats->ucastPktsRxOK +
152 				     devRxStats->mcastPktsRxOK +
153 				     devRxStats->bcastPktsRxOK;
154 
155 		stats->rx_bytes += devRxStats->ucastBytesRxOK +
156 				   devRxStats->mcastBytesRxOK +
157 				   devRxStats->bcastBytesRxOK;
158 
159 		stats->rx_errors += devRxStats->pktsRxError;
160 		stats->rx_dropped += drvRxStats->drop_total;
161 		stats->multicast +=  devRxStats->mcastPktsRxOK;
162 	}
163 
164 	return stats;
165 }
166 
167 static int
168 vmxnet3_get_sset_count(struct net_device *netdev, int sset)
169 {
170 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
171 	switch (sset) {
172 	case ETH_SS_STATS:
173 		return (ARRAY_SIZE(vmxnet3_tq_dev_stats) +
174 			ARRAY_SIZE(vmxnet3_tq_driver_stats)) *
175 		       adapter->num_tx_queues +
176 		       (ARRAY_SIZE(vmxnet3_rq_dev_stats) +
177 			ARRAY_SIZE(vmxnet3_rq_driver_stats)) *
178 		       adapter->num_rx_queues +
179 			ARRAY_SIZE(vmxnet3_global_stats);
180 	default:
181 		return -EOPNOTSUPP;
182 	}
183 }
184 
185 
186 /* Should be multiple of 4 */
187 #define NUM_TX_REGS	8
188 #define NUM_RX_REGS	12
189 
190 static int
191 vmxnet3_get_regs_len(struct net_device *netdev)
192 {
193 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
194 	return (adapter->num_tx_queues * NUM_TX_REGS * sizeof(u32) +
195 		adapter->num_rx_queues * NUM_RX_REGS * sizeof(u32));
196 }
197 
198 
199 static void
200 vmxnet3_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
201 {
202 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
203 
204 	strlcpy(drvinfo->driver, vmxnet3_driver_name, sizeof(drvinfo->driver));
205 
206 	strlcpy(drvinfo->version, VMXNET3_DRIVER_VERSION_REPORT,
207 		sizeof(drvinfo->version));
208 
209 	strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
210 		sizeof(drvinfo->bus_info));
211 	drvinfo->n_stats = vmxnet3_get_sset_count(netdev, ETH_SS_STATS);
212 	drvinfo->testinfo_len = 0;
213 	drvinfo->eedump_len   = 0;
214 	drvinfo->regdump_len  = vmxnet3_get_regs_len(netdev);
215 }
216 
217 
218 static void
219 vmxnet3_get_strings(struct net_device *netdev, u32 stringset, u8 *buf)
220 {
221 	 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
222 	if (stringset == ETH_SS_STATS) {
223 		int i, j;
224 		for (j = 0; j < adapter->num_tx_queues; j++) {
225 			for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_dev_stats); i++) {
226 				memcpy(buf, vmxnet3_tq_dev_stats[i].desc,
227 				       ETH_GSTRING_LEN);
228 				buf += ETH_GSTRING_LEN;
229 			}
230 			for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_driver_stats);
231 			     i++) {
232 				memcpy(buf, vmxnet3_tq_driver_stats[i].desc,
233 				       ETH_GSTRING_LEN);
234 				buf += ETH_GSTRING_LEN;
235 			}
236 		}
237 
238 		for (j = 0; j < adapter->num_rx_queues; j++) {
239 			for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_dev_stats); i++) {
240 				memcpy(buf, vmxnet3_rq_dev_stats[i].desc,
241 				       ETH_GSTRING_LEN);
242 				buf += ETH_GSTRING_LEN;
243 			}
244 			for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_driver_stats);
245 			     i++) {
246 				memcpy(buf, vmxnet3_rq_driver_stats[i].desc,
247 				       ETH_GSTRING_LEN);
248 				buf += ETH_GSTRING_LEN;
249 			}
250 		}
251 
252 		for (i = 0; i < ARRAY_SIZE(vmxnet3_global_stats); i++) {
253 			memcpy(buf, vmxnet3_global_stats[i].desc,
254 				ETH_GSTRING_LEN);
255 			buf += ETH_GSTRING_LEN;
256 		}
257 	}
258 }
259 
260 int vmxnet3_set_features(struct net_device *netdev, netdev_features_t features)
261 {
262 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
263 	unsigned long flags;
264 	netdev_features_t changed = features ^ netdev->features;
265 
266 	if (changed & (NETIF_F_RXCSUM | NETIF_F_LRO |
267 		       NETIF_F_HW_VLAN_CTAG_RX)) {
268 		if (features & NETIF_F_RXCSUM)
269 			adapter->shared->devRead.misc.uptFeatures |=
270 			UPT1_F_RXCSUM;
271 		else
272 			adapter->shared->devRead.misc.uptFeatures &=
273 			~UPT1_F_RXCSUM;
274 
275 		/* update hardware LRO capability accordingly */
276 		if (features & NETIF_F_LRO)
277 			adapter->shared->devRead.misc.uptFeatures |=
278 							UPT1_F_LRO;
279 		else
280 			adapter->shared->devRead.misc.uptFeatures &=
281 							~UPT1_F_LRO;
282 
283 		if (features & NETIF_F_HW_VLAN_CTAG_RX)
284 			adapter->shared->devRead.misc.uptFeatures |=
285 			UPT1_F_RXVLAN;
286 		else
287 			adapter->shared->devRead.misc.uptFeatures &=
288 			~UPT1_F_RXVLAN;
289 
290 		spin_lock_irqsave(&adapter->cmd_lock, flags);
291 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
292 				       VMXNET3_CMD_UPDATE_FEATURE);
293 		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
294 	}
295 	return 0;
296 }
297 
298 static void
299 vmxnet3_get_ethtool_stats(struct net_device *netdev,
300 			  struct ethtool_stats *stats, u64  *buf)
301 {
302 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
303 	unsigned long flags;
304 	u8 *base;
305 	int i;
306 	int j = 0;
307 
308 	spin_lock_irqsave(&adapter->cmd_lock, flags);
309 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
310 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
311 
312 	/* this does assume each counter is 64-bit wide */
313 	for (j = 0; j < adapter->num_tx_queues; j++) {
314 		base = (u8 *)&adapter->tqd_start[j].stats;
315 		*buf++ = (u64)j;
316 		for (i = 1; i < ARRAY_SIZE(vmxnet3_tq_dev_stats); i++)
317 			*buf++ = *(u64 *)(base +
318 					  vmxnet3_tq_dev_stats[i].offset);
319 
320 		base = (u8 *)&adapter->tx_queue[j].stats;
321 		for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_driver_stats); i++)
322 			*buf++ = *(u64 *)(base +
323 					  vmxnet3_tq_driver_stats[i].offset);
324 	}
325 
326 	for (j = 0; j < adapter->num_rx_queues; j++) {
327 		base = (u8 *)&adapter->rqd_start[j].stats;
328 		*buf++ = (u64) j;
329 		for (i = 1; i < ARRAY_SIZE(vmxnet3_rq_dev_stats); i++)
330 			*buf++ = *(u64 *)(base +
331 					  vmxnet3_rq_dev_stats[i].offset);
332 
333 		base = (u8 *)&adapter->rx_queue[j].stats;
334 		for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_driver_stats); i++)
335 			*buf++ = *(u64 *)(base +
336 					  vmxnet3_rq_driver_stats[i].offset);
337 	}
338 
339 	base = (u8 *)adapter;
340 	for (i = 0; i < ARRAY_SIZE(vmxnet3_global_stats); i++)
341 		*buf++ = *(u64 *)(base + vmxnet3_global_stats[i].offset);
342 }
343 
344 
345 static void
346 vmxnet3_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
347 {
348 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
349 	u32 *buf = p;
350 	int i = 0, j = 0;
351 
352 	memset(p, 0, vmxnet3_get_regs_len(netdev));
353 
354 	regs->version = 1;
355 
356 	/* Update vmxnet3_get_regs_len if we want to dump more registers */
357 
358 	/* make each ring use multiple of 16 bytes */
359 	for (i = 0; i < adapter->num_tx_queues; i++) {
360 		buf[j++] = adapter->tx_queue[i].tx_ring.next2fill;
361 		buf[j++] = adapter->tx_queue[i].tx_ring.next2comp;
362 		buf[j++] = adapter->tx_queue[i].tx_ring.gen;
363 		buf[j++] = 0;
364 
365 		buf[j++] = adapter->tx_queue[i].comp_ring.next2proc;
366 		buf[j++] = adapter->tx_queue[i].comp_ring.gen;
367 		buf[j++] = adapter->tx_queue[i].stopped;
368 		buf[j++] = 0;
369 	}
370 
371 	for (i = 0; i < adapter->num_rx_queues; i++) {
372 		buf[j++] = adapter->rx_queue[i].rx_ring[0].next2fill;
373 		buf[j++] = adapter->rx_queue[i].rx_ring[0].next2comp;
374 		buf[j++] = adapter->rx_queue[i].rx_ring[0].gen;
375 		buf[j++] = 0;
376 
377 		buf[j++] = adapter->rx_queue[i].rx_ring[1].next2fill;
378 		buf[j++] = adapter->rx_queue[i].rx_ring[1].next2comp;
379 		buf[j++] = adapter->rx_queue[i].rx_ring[1].gen;
380 		buf[j++] = 0;
381 
382 		buf[j++] = adapter->rx_queue[i].comp_ring.next2proc;
383 		buf[j++] = adapter->rx_queue[i].comp_ring.gen;
384 		buf[j++] = 0;
385 		buf[j++] = 0;
386 	}
387 
388 }
389 
390 
391 static void
392 vmxnet3_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
393 {
394 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
395 
396 	wol->supported = WAKE_UCAST | WAKE_ARP | WAKE_MAGIC;
397 	wol->wolopts = adapter->wol;
398 }
399 
400 
401 static int
402 vmxnet3_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
403 {
404 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
405 
406 	if (wol->wolopts & (WAKE_PHY | WAKE_MCAST | WAKE_BCAST |
407 			    WAKE_MAGICSECURE)) {
408 		return -EOPNOTSUPP;
409 	}
410 
411 	adapter->wol = wol->wolopts;
412 
413 	device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
414 
415 	return 0;
416 }
417 
418 
419 static int
420 vmxnet3_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
421 {
422 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
423 
424 	ecmd->supported = SUPPORTED_10000baseT_Full | SUPPORTED_1000baseT_Full |
425 			  SUPPORTED_TP;
426 	ecmd->advertising = ADVERTISED_TP;
427 	ecmd->port = PORT_TP;
428 	ecmd->transceiver = XCVR_INTERNAL;
429 
430 	if (adapter->link_speed) {
431 		ethtool_cmd_speed_set(ecmd, adapter->link_speed);
432 		ecmd->duplex = DUPLEX_FULL;
433 	} else {
434 		ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
435 		ecmd->duplex = DUPLEX_UNKNOWN;
436 	}
437 	return 0;
438 }
439 
440 
441 static void
442 vmxnet3_get_ringparam(struct net_device *netdev,
443 		      struct ethtool_ringparam *param)
444 {
445 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
446 
447 	param->rx_max_pending = VMXNET3_RX_RING_MAX_SIZE;
448 	param->tx_max_pending = VMXNET3_TX_RING_MAX_SIZE;
449 	param->rx_mini_max_pending = 0;
450 	param->rx_jumbo_max_pending = VMXNET3_RX_RING2_MAX_SIZE;
451 
452 	param->rx_pending = adapter->rx_ring_size;
453 	param->tx_pending = adapter->tx_ring_size;
454 	param->rx_mini_pending = 0;
455 	param->rx_jumbo_pending = adapter->rx_ring2_size;
456 }
457 
458 
459 static int
460 vmxnet3_set_ringparam(struct net_device *netdev,
461 		      struct ethtool_ringparam *param)
462 {
463 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
464 	u32 new_tx_ring_size, new_rx_ring_size, new_rx_ring2_size;
465 	u32 sz;
466 	int err = 0;
467 
468 	if (param->tx_pending == 0 || param->tx_pending >
469 						VMXNET3_TX_RING_MAX_SIZE)
470 		return -EINVAL;
471 
472 	if (param->rx_pending == 0 || param->rx_pending >
473 						VMXNET3_RX_RING_MAX_SIZE)
474 		return -EINVAL;
475 
476 	if (param->rx_jumbo_pending == 0 ||
477 	    param->rx_jumbo_pending > VMXNET3_RX_RING2_MAX_SIZE)
478 		return -EINVAL;
479 
480 	/* if adapter not yet initialized, do nothing */
481 	if (adapter->rx_buf_per_pkt == 0) {
482 		netdev_err(netdev, "adapter not completely initialized, "
483 			   "ring size cannot be changed yet\n");
484 		return -EOPNOTSUPP;
485 	}
486 
487 	/* round it up to a multiple of VMXNET3_RING_SIZE_ALIGN */
488 	new_tx_ring_size = (param->tx_pending + VMXNET3_RING_SIZE_MASK) &
489 							~VMXNET3_RING_SIZE_MASK;
490 	new_tx_ring_size = min_t(u32, new_tx_ring_size,
491 				 VMXNET3_TX_RING_MAX_SIZE);
492 	if (new_tx_ring_size > VMXNET3_TX_RING_MAX_SIZE || (new_tx_ring_size %
493 						VMXNET3_RING_SIZE_ALIGN) != 0)
494 		return -EINVAL;
495 
496 	/* ring0 has to be a multiple of
497 	 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
498 	 */
499 	sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
500 	new_rx_ring_size = (param->rx_pending + sz - 1) / sz * sz;
501 	new_rx_ring_size = min_t(u32, new_rx_ring_size,
502 				 VMXNET3_RX_RING_MAX_SIZE / sz * sz);
503 	if (new_rx_ring_size > VMXNET3_RX_RING_MAX_SIZE || (new_rx_ring_size %
504 							   sz) != 0)
505 		return -EINVAL;
506 
507 	/* ring2 has to be a multiple of VMXNET3_RING_SIZE_ALIGN */
508 	new_rx_ring2_size = (param->rx_jumbo_pending + VMXNET3_RING_SIZE_MASK) &
509 				~VMXNET3_RING_SIZE_MASK;
510 	new_rx_ring2_size = min_t(u32, new_rx_ring2_size,
511 				  VMXNET3_RX_RING2_MAX_SIZE);
512 
513 	if (new_tx_ring_size == adapter->tx_ring_size &&
514 	    new_rx_ring_size == adapter->rx_ring_size &&
515 	    new_rx_ring2_size == adapter->rx_ring2_size) {
516 		return 0;
517 	}
518 
519 	/*
520 	 * Reset_work may be in the middle of resetting the device, wait for its
521 	 * completion.
522 	 */
523 	while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
524 		msleep(1);
525 
526 	if (netif_running(netdev)) {
527 		vmxnet3_quiesce_dev(adapter);
528 		vmxnet3_reset_dev(adapter);
529 
530 		/* recreate the rx queue and the tx queue based on the
531 		 * new sizes */
532 		vmxnet3_tq_destroy_all(adapter);
533 		vmxnet3_rq_destroy_all(adapter);
534 
535 		err = vmxnet3_create_queues(adapter, new_tx_ring_size,
536 			new_rx_ring_size, new_rx_ring2_size);
537 
538 		if (err) {
539 			/* failed, most likely because of OOM, try default
540 			 * size */
541 			netdev_err(netdev, "failed to apply new sizes, "
542 				   "try the default ones\n");
543 			new_rx_ring_size = VMXNET3_DEF_RX_RING_SIZE;
544 			new_rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE;
545 			new_tx_ring_size = VMXNET3_DEF_TX_RING_SIZE;
546 			err = vmxnet3_create_queues(adapter,
547 						    new_tx_ring_size,
548 						    new_rx_ring_size,
549 						    new_rx_ring2_size);
550 			if (err) {
551 				netdev_err(netdev, "failed to create queues "
552 					   "with default sizes. Closing it\n");
553 				goto out;
554 			}
555 		}
556 
557 		err = vmxnet3_activate_dev(adapter);
558 		if (err)
559 			netdev_err(netdev, "failed to re-activate, error %d."
560 				   " Closing it\n", err);
561 	}
562 	adapter->tx_ring_size = new_tx_ring_size;
563 	adapter->rx_ring_size = new_rx_ring_size;
564 	adapter->rx_ring2_size = new_rx_ring2_size;
565 
566 out:
567 	clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
568 	if (err)
569 		vmxnet3_force_close(adapter);
570 
571 	return err;
572 }
573 
574 
575 static int
576 vmxnet3_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info,
577 		  u32 *rules)
578 {
579 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
580 	switch (info->cmd) {
581 	case ETHTOOL_GRXRINGS:
582 		info->data = adapter->num_rx_queues;
583 		return 0;
584 	}
585 	return -EOPNOTSUPP;
586 }
587 
588 #ifdef VMXNET3_RSS
589 static u32
590 vmxnet3_get_rss_indir_size(struct net_device *netdev)
591 {
592 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
593 	struct UPT1_RSSConf *rssConf = adapter->rss_conf;
594 
595 	return rssConf->indTableSize;
596 }
597 
598 static int
599 vmxnet3_get_rss(struct net_device *netdev, u32 *p, u8 *key, u8 *hfunc)
600 {
601 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
602 	struct UPT1_RSSConf *rssConf = adapter->rss_conf;
603 	unsigned int n = rssConf->indTableSize;
604 
605 	if (hfunc)
606 		*hfunc = ETH_RSS_HASH_TOP;
607 	if (!p)
608 		return 0;
609 	while (n--)
610 		p[n] = rssConf->indTable[n];
611 	return 0;
612 
613 }
614 
615 static int
616 vmxnet3_set_rss(struct net_device *netdev, const u32 *p, const u8 *key,
617 		const u8 hfunc)
618 {
619 	unsigned int i;
620 	unsigned long flags;
621 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
622 	struct UPT1_RSSConf *rssConf = adapter->rss_conf;
623 
624 	/* We do not allow change in unsupported parameters */
625 	if (key ||
626 	    (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
627 		return -EOPNOTSUPP;
628 	if (!p)
629 		return 0;
630 	for (i = 0; i < rssConf->indTableSize; i++)
631 		rssConf->indTable[i] = p[i];
632 
633 	spin_lock_irqsave(&adapter->cmd_lock, flags);
634 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
635 			       VMXNET3_CMD_UPDATE_RSSIDT);
636 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
637 
638 	return 0;
639 
640 }
641 #endif
642 
643 static const struct ethtool_ops vmxnet3_ethtool_ops = {
644 	.get_settings      = vmxnet3_get_settings,
645 	.get_drvinfo       = vmxnet3_get_drvinfo,
646 	.get_regs_len      = vmxnet3_get_regs_len,
647 	.get_regs          = vmxnet3_get_regs,
648 	.get_wol           = vmxnet3_get_wol,
649 	.set_wol           = vmxnet3_set_wol,
650 	.get_link          = ethtool_op_get_link,
651 	.get_strings       = vmxnet3_get_strings,
652 	.get_sset_count	   = vmxnet3_get_sset_count,
653 	.get_ethtool_stats = vmxnet3_get_ethtool_stats,
654 	.get_ringparam     = vmxnet3_get_ringparam,
655 	.set_ringparam     = vmxnet3_set_ringparam,
656 	.get_rxnfc         = vmxnet3_get_rxnfc,
657 #ifdef VMXNET3_RSS
658 	.get_rxfh_indir_size = vmxnet3_get_rss_indir_size,
659 	.get_rxfh          = vmxnet3_get_rss,
660 	.set_rxfh          = vmxnet3_set_rss,
661 #endif
662 };
663 
664 void vmxnet3_set_ethtool_ops(struct net_device *netdev)
665 {
666 	netdev->ethtool_ops = &vmxnet3_ethtool_ops;
667 }
668