1 /*******************************************************************************
2 
3   Intel(R) 82576 Virtual Function Linux driver
4   Copyright(c) 2009 - 2012 Intel Corporation.
5 
6   This program is free software; you can redistribute it and/or modify it
7   under the terms and conditions of the GNU General Public License,
8   version 2, as published by the Free Software Foundation.
9 
10   This program is distributed in the hope it will be useful, but WITHOUT
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   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 
26 *******************************************************************************/
27 
28 /* ethtool support for igbvf */
29 
30 #include <linux/netdevice.h>
31 #include <linux/ethtool.h>
32 #include <linux/pci.h>
33 #include <linux/vmalloc.h>
34 #include <linux/delay.h>
35 
36 #include "igbvf.h"
37 #include <linux/if_vlan.h>
38 
39 
40 struct igbvf_stats {
41 	char stat_string[ETH_GSTRING_LEN];
42 	int sizeof_stat;
43 	int stat_offset;
44 	int base_stat_offset;
45 };
46 
47 #define IGBVF_STAT(current, base) \
48 		sizeof(((struct igbvf_adapter *)0)->current), \
49 		offsetof(struct igbvf_adapter, current), \
50 		offsetof(struct igbvf_adapter, base)
51 
52 static const struct igbvf_stats igbvf_gstrings_stats[] = {
53 	{ "rx_packets", IGBVF_STAT(stats.gprc, stats.base_gprc) },
54 	{ "tx_packets", IGBVF_STAT(stats.gptc, stats.base_gptc) },
55 	{ "rx_bytes", IGBVF_STAT(stats.gorc, stats.base_gorc) },
56 	{ "tx_bytes", IGBVF_STAT(stats.gotc, stats.base_gotc) },
57 	{ "multicast", IGBVF_STAT(stats.mprc, stats.base_mprc) },
58 	{ "lbrx_bytes", IGBVF_STAT(stats.gorlbc, stats.base_gorlbc) },
59 	{ "lbrx_packets", IGBVF_STAT(stats.gprlbc, stats.base_gprlbc) },
60 	{ "tx_restart_queue", IGBVF_STAT(restart_queue, zero_base) },
61 	{ "rx_long_byte_count", IGBVF_STAT(stats.gorc, stats.base_gorc) },
62 	{ "rx_csum_offload_good", IGBVF_STAT(hw_csum_good, zero_base) },
63 	{ "rx_csum_offload_errors", IGBVF_STAT(hw_csum_err, zero_base) },
64 	{ "rx_header_split", IGBVF_STAT(rx_hdr_split, zero_base) },
65 	{ "alloc_rx_buff_failed", IGBVF_STAT(alloc_rx_buff_failed, zero_base) },
66 };
67 
68 #define IGBVF_GLOBAL_STATS_LEN ARRAY_SIZE(igbvf_gstrings_stats)
69 
70 static const char igbvf_gstrings_test[][ETH_GSTRING_LEN] = {
71 	"Link test   (on/offline)"
72 };
73 
74 #define IGBVF_TEST_LEN ARRAY_SIZE(igbvf_gstrings_test)
75 
76 static int igbvf_get_settings(struct net_device *netdev,
77                               struct ethtool_cmd *ecmd)
78 {
79 	struct igbvf_adapter *adapter = netdev_priv(netdev);
80 	struct e1000_hw *hw = &adapter->hw;
81 	u32 status;
82 
83 	ecmd->supported   = SUPPORTED_1000baseT_Full;
84 
85 	ecmd->advertising = ADVERTISED_1000baseT_Full;
86 
87 	ecmd->port = -1;
88 	ecmd->transceiver = XCVR_DUMMY1;
89 
90 	status = er32(STATUS);
91 	if (status & E1000_STATUS_LU) {
92 		if (status & E1000_STATUS_SPEED_1000)
93 			ethtool_cmd_speed_set(ecmd, SPEED_1000);
94 		else if (status & E1000_STATUS_SPEED_100)
95 			ethtool_cmd_speed_set(ecmd, SPEED_100);
96 		else
97 			ethtool_cmd_speed_set(ecmd, SPEED_10);
98 
99 		if (status & E1000_STATUS_FD)
100 			ecmd->duplex = DUPLEX_FULL;
101 		else
102 			ecmd->duplex = DUPLEX_HALF;
103 	} else {
104 		ethtool_cmd_speed_set(ecmd, -1);
105 		ecmd->duplex = -1;
106 	}
107 
108 	ecmd->autoneg = AUTONEG_DISABLE;
109 
110 	return 0;
111 }
112 
113 static int igbvf_set_settings(struct net_device *netdev,
114                               struct ethtool_cmd *ecmd)
115 {
116 	return -EOPNOTSUPP;
117 }
118 
119 static void igbvf_get_pauseparam(struct net_device *netdev,
120                                  struct ethtool_pauseparam *pause)
121 {
122 	return;
123 }
124 
125 static int igbvf_set_pauseparam(struct net_device *netdev,
126                                 struct ethtool_pauseparam *pause)
127 {
128 	return -EOPNOTSUPP;
129 }
130 
131 static u32 igbvf_get_msglevel(struct net_device *netdev)
132 {
133 	struct igbvf_adapter *adapter = netdev_priv(netdev);
134 	return adapter->msg_enable;
135 }
136 
137 static void igbvf_set_msglevel(struct net_device *netdev, u32 data)
138 {
139 	struct igbvf_adapter *adapter = netdev_priv(netdev);
140 	adapter->msg_enable = data;
141 }
142 
143 static int igbvf_get_regs_len(struct net_device *netdev)
144 {
145 #define IGBVF_REGS_LEN 8
146 	return IGBVF_REGS_LEN * sizeof(u32);
147 }
148 
149 static void igbvf_get_regs(struct net_device *netdev,
150                            struct ethtool_regs *regs, void *p)
151 {
152 	struct igbvf_adapter *adapter = netdev_priv(netdev);
153 	struct e1000_hw *hw = &adapter->hw;
154 	u32 *regs_buff = p;
155 
156 	memset(p, 0, IGBVF_REGS_LEN * sizeof(u32));
157 
158 	regs->version = (1 << 24) | (adapter->pdev->revision << 16) |
159 			adapter->pdev->device;
160 
161 	regs_buff[0] = er32(CTRL);
162 	regs_buff[1] = er32(STATUS);
163 
164 	regs_buff[2] = er32(RDLEN(0));
165 	regs_buff[3] = er32(RDH(0));
166 	regs_buff[4] = er32(RDT(0));
167 
168 	regs_buff[5] = er32(TDLEN(0));
169 	regs_buff[6] = er32(TDH(0));
170 	regs_buff[7] = er32(TDT(0));
171 }
172 
173 static int igbvf_get_eeprom_len(struct net_device *netdev)
174 {
175 	return 0;
176 }
177 
178 static int igbvf_get_eeprom(struct net_device *netdev,
179                             struct ethtool_eeprom *eeprom, u8 *bytes)
180 {
181 	return -EOPNOTSUPP;
182 }
183 
184 static int igbvf_set_eeprom(struct net_device *netdev,
185                             struct ethtool_eeprom *eeprom, u8 *bytes)
186 {
187 	return -EOPNOTSUPP;
188 }
189 
190 static void igbvf_get_drvinfo(struct net_device *netdev,
191                               struct ethtool_drvinfo *drvinfo)
192 {
193 	struct igbvf_adapter *adapter = netdev_priv(netdev);
194 
195 	strlcpy(drvinfo->driver,  igbvf_driver_name, sizeof(drvinfo->driver));
196 	strlcpy(drvinfo->version, igbvf_driver_version,
197 		sizeof(drvinfo->version));
198 	strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
199 		sizeof(drvinfo->bus_info));
200 	drvinfo->regdump_len = igbvf_get_regs_len(netdev);
201 	drvinfo->eedump_len = igbvf_get_eeprom_len(netdev);
202 }
203 
204 static void igbvf_get_ringparam(struct net_device *netdev,
205                                 struct ethtool_ringparam *ring)
206 {
207 	struct igbvf_adapter *adapter = netdev_priv(netdev);
208 	struct igbvf_ring *tx_ring = adapter->tx_ring;
209 	struct igbvf_ring *rx_ring = adapter->rx_ring;
210 
211 	ring->rx_max_pending = IGBVF_MAX_RXD;
212 	ring->tx_max_pending = IGBVF_MAX_TXD;
213 	ring->rx_pending = rx_ring->count;
214 	ring->tx_pending = tx_ring->count;
215 }
216 
217 static int igbvf_set_ringparam(struct net_device *netdev,
218                                struct ethtool_ringparam *ring)
219 {
220 	struct igbvf_adapter *adapter = netdev_priv(netdev);
221 	struct igbvf_ring *temp_ring;
222 	int err = 0;
223 	u32 new_rx_count, new_tx_count;
224 
225 	if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
226 		return -EINVAL;
227 
228 	new_rx_count = max(ring->rx_pending, (u32)IGBVF_MIN_RXD);
229 	new_rx_count = min(new_rx_count, (u32)IGBVF_MAX_RXD);
230 	new_rx_count = ALIGN(new_rx_count, REQ_RX_DESCRIPTOR_MULTIPLE);
231 
232 	new_tx_count = max(ring->tx_pending, (u32)IGBVF_MIN_TXD);
233 	new_tx_count = min(new_tx_count, (u32)IGBVF_MAX_TXD);
234 	new_tx_count = ALIGN(new_tx_count, REQ_TX_DESCRIPTOR_MULTIPLE);
235 
236 	if ((new_tx_count == adapter->tx_ring->count) &&
237 	    (new_rx_count == adapter->rx_ring->count)) {
238 		/* nothing to do */
239 		return 0;
240 	}
241 
242 	while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
243 		msleep(1);
244 
245 	if (!netif_running(adapter->netdev)) {
246 		adapter->tx_ring->count = new_tx_count;
247 		adapter->rx_ring->count = new_rx_count;
248 		goto clear_reset;
249 	}
250 
251 	temp_ring = vmalloc(sizeof(struct igbvf_ring));
252 	if (!temp_ring) {
253 		err = -ENOMEM;
254 		goto clear_reset;
255 	}
256 
257 	igbvf_down(adapter);
258 
259 	/*
260 	 * We can't just free everything and then setup again,
261 	 * because the ISRs in MSI-X mode get passed pointers
262 	 * to the tx and rx ring structs.
263 	 */
264 	if (new_tx_count != adapter->tx_ring->count) {
265 		memcpy(temp_ring, adapter->tx_ring, sizeof(struct igbvf_ring));
266 
267 		temp_ring->count = new_tx_count;
268 		err = igbvf_setup_tx_resources(adapter, temp_ring);
269 		if (err)
270 			goto err_setup;
271 
272 		igbvf_free_tx_resources(adapter->tx_ring);
273 
274 		memcpy(adapter->tx_ring, temp_ring, sizeof(struct igbvf_ring));
275 	}
276 
277 	if (new_rx_count != adapter->rx_ring->count) {
278 		memcpy(temp_ring, adapter->rx_ring, sizeof(struct igbvf_ring));
279 
280 		temp_ring->count = new_rx_count;
281 		err = igbvf_setup_rx_resources(adapter, temp_ring);
282 		if (err)
283 			goto err_setup;
284 
285 		igbvf_free_rx_resources(adapter->rx_ring);
286 
287 		memcpy(adapter->rx_ring, temp_ring,sizeof(struct igbvf_ring));
288 	}
289 err_setup:
290 	igbvf_up(adapter);
291 	vfree(temp_ring);
292 clear_reset:
293 	clear_bit(__IGBVF_RESETTING, &adapter->state);
294 	return err;
295 }
296 
297 static int igbvf_link_test(struct igbvf_adapter *adapter, u64 *data)
298 {
299 	struct e1000_hw *hw = &adapter->hw;
300 	*data = 0;
301 
302 	hw->mac.ops.check_for_link(hw);
303 
304 	if (!(er32(STATUS) & E1000_STATUS_LU))
305 		*data = 1;
306 
307 	return *data;
308 }
309 
310 static void igbvf_diag_test(struct net_device *netdev,
311                             struct ethtool_test *eth_test, u64 *data)
312 {
313 	struct igbvf_adapter *adapter = netdev_priv(netdev);
314 
315 	set_bit(__IGBVF_TESTING, &adapter->state);
316 
317 	/*
318 	 * Link test performed before hardware reset so autoneg doesn't
319 	 * interfere with test result
320 	 */
321 	if (igbvf_link_test(adapter, &data[0]))
322 		eth_test->flags |= ETH_TEST_FL_FAILED;
323 
324 	clear_bit(__IGBVF_TESTING, &adapter->state);
325 	msleep_interruptible(4 * 1000);
326 }
327 
328 static void igbvf_get_wol(struct net_device *netdev,
329                           struct ethtool_wolinfo *wol)
330 {
331 	wol->supported = 0;
332 	wol->wolopts = 0;
333 }
334 
335 static int igbvf_set_wol(struct net_device *netdev,
336                          struct ethtool_wolinfo *wol)
337 {
338 	return -EOPNOTSUPP;
339 }
340 
341 static int igbvf_get_coalesce(struct net_device *netdev,
342                               struct ethtool_coalesce *ec)
343 {
344 	struct igbvf_adapter *adapter = netdev_priv(netdev);
345 
346 	if (adapter->requested_itr <= 3)
347 		ec->rx_coalesce_usecs = adapter->requested_itr;
348 	else
349 		ec->rx_coalesce_usecs = adapter->current_itr >> 2;
350 
351 	return 0;
352 }
353 
354 static int igbvf_set_coalesce(struct net_device *netdev,
355                               struct ethtool_coalesce *ec)
356 {
357 	struct igbvf_adapter *adapter = netdev_priv(netdev);
358 	struct e1000_hw *hw = &adapter->hw;
359 
360 	if ((ec->rx_coalesce_usecs >= IGBVF_MIN_ITR_USECS) &&
361 	     (ec->rx_coalesce_usecs <= IGBVF_MAX_ITR_USECS)) {
362 		adapter->current_itr = ec->rx_coalesce_usecs << 2;
363 		adapter->requested_itr = 1000000000 /
364 					(adapter->current_itr * 256);
365 	} else if ((ec->rx_coalesce_usecs == 3) ||
366 		   (ec->rx_coalesce_usecs == 2)) {
367 		adapter->current_itr = IGBVF_START_ITR;
368 		adapter->requested_itr = ec->rx_coalesce_usecs;
369 	} else if (ec->rx_coalesce_usecs == 0) {
370 		/*
371 		 * The user's desire is to turn off interrupt throttling
372 		 * altogether, but due to HW limitations, we can't do that.
373 		 * Instead we set a very small value in EITR, which would
374 		 * allow ~967k interrupts per second, but allow the adapter's
375 		 * internal clocking to still function properly.
376 		 */
377 		adapter->current_itr = 4;
378 		adapter->requested_itr = 1000000000 /
379 					(adapter->current_itr * 256);
380 	} else
381 		return -EINVAL;
382 
383 	writel(adapter->current_itr,
384 	       hw->hw_addr + adapter->rx_ring->itr_register);
385 
386 	return 0;
387 }
388 
389 static int igbvf_nway_reset(struct net_device *netdev)
390 {
391 	struct igbvf_adapter *adapter = netdev_priv(netdev);
392 	if (netif_running(netdev))
393 		igbvf_reinit_locked(adapter);
394 	return 0;
395 }
396 
397 
398 static void igbvf_get_ethtool_stats(struct net_device *netdev,
399                                     struct ethtool_stats *stats,
400                                     u64 *data)
401 {
402 	struct igbvf_adapter *adapter = netdev_priv(netdev);
403 	int i;
404 
405 	igbvf_update_stats(adapter);
406 	for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
407 		char *p = (char *)adapter +
408 		          igbvf_gstrings_stats[i].stat_offset;
409 		char *b = (char *)adapter +
410 		          igbvf_gstrings_stats[i].base_stat_offset;
411 		data[i] = ((igbvf_gstrings_stats[i].sizeof_stat ==
412 		            sizeof(u64)) ? (*(u64 *)p - *(u64 *)b) :
413 		            (*(u32 *)p - *(u32 *)b));
414 	}
415 
416 }
417 
418 static int igbvf_get_sset_count(struct net_device *dev, int stringset)
419 {
420 	switch(stringset) {
421 	case ETH_SS_TEST:
422 		return IGBVF_TEST_LEN;
423 	case ETH_SS_STATS:
424 		return IGBVF_GLOBAL_STATS_LEN;
425 	default:
426 		return -EINVAL;
427 	}
428 }
429 
430 static void igbvf_get_strings(struct net_device *netdev, u32 stringset,
431                               u8 *data)
432 {
433 	u8 *p = data;
434 	int i;
435 
436 	switch (stringset) {
437 	case ETH_SS_TEST:
438 		memcpy(data, *igbvf_gstrings_test, sizeof(igbvf_gstrings_test));
439 		break;
440 	case ETH_SS_STATS:
441 		for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
442 			memcpy(p, igbvf_gstrings_stats[i].stat_string,
443 			       ETH_GSTRING_LEN);
444 			p += ETH_GSTRING_LEN;
445 		}
446 		break;
447 	}
448 }
449 
450 static const struct ethtool_ops igbvf_ethtool_ops = {
451 	.get_settings		= igbvf_get_settings,
452 	.set_settings		= igbvf_set_settings,
453 	.get_drvinfo		= igbvf_get_drvinfo,
454 	.get_regs_len		= igbvf_get_regs_len,
455 	.get_regs		= igbvf_get_regs,
456 	.get_wol		= igbvf_get_wol,
457 	.set_wol		= igbvf_set_wol,
458 	.get_msglevel		= igbvf_get_msglevel,
459 	.set_msglevel		= igbvf_set_msglevel,
460 	.nway_reset		= igbvf_nway_reset,
461 	.get_link		= ethtool_op_get_link,
462 	.get_eeprom_len		= igbvf_get_eeprom_len,
463 	.get_eeprom		= igbvf_get_eeprom,
464 	.set_eeprom		= igbvf_set_eeprom,
465 	.get_ringparam		= igbvf_get_ringparam,
466 	.set_ringparam		= igbvf_set_ringparam,
467 	.get_pauseparam		= igbvf_get_pauseparam,
468 	.set_pauseparam		= igbvf_set_pauseparam,
469 	.self_test		= igbvf_diag_test,
470 	.get_sset_count		= igbvf_get_sset_count,
471 	.get_strings		= igbvf_get_strings,
472 	.get_ethtool_stats	= igbvf_get_ethtool_stats,
473 	.get_coalesce		= igbvf_get_coalesce,
474 	.set_coalesce		= igbvf_set_coalesce,
475 };
476 
477 void igbvf_set_ethtool_ops(struct net_device *netdev)
478 {
479 	SET_ETHTOOL_OPS(netdev, &igbvf_ethtool_ops);
480 }
481