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, see <http://www.gnu.org/licenses/>.
17 
18   The full GNU General Public License is included in this distribution in
19   the file called "COPYING".
20 
21   Contact Information:
22   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 
25 *******************************************************************************/
26 
27 /* ethtool support for igbvf */
28 
29 #include <linux/netdevice.h>
30 #include <linux/ethtool.h>
31 #include <linux/pci.h>
32 #include <linux/vmalloc.h>
33 #include <linux/delay.h>
34 
35 #include "igbvf.h"
36 #include <linux/if_vlan.h>
37 
38 struct igbvf_stats {
39 	char stat_string[ETH_GSTRING_LEN];
40 	int sizeof_stat;
41 	int stat_offset;
42 	int base_stat_offset;
43 };
44 
45 #define IGBVF_STAT(current, base) \
46 		sizeof(((struct igbvf_adapter *)0)->current), \
47 		offsetof(struct igbvf_adapter, current), \
48 		offsetof(struct igbvf_adapter, base)
49 
50 static const struct igbvf_stats igbvf_gstrings_stats[] = {
51 	{ "rx_packets", IGBVF_STAT(stats.gprc, stats.base_gprc) },
52 	{ "tx_packets", IGBVF_STAT(stats.gptc, stats.base_gptc) },
53 	{ "rx_bytes", IGBVF_STAT(stats.gorc, stats.base_gorc) },
54 	{ "tx_bytes", IGBVF_STAT(stats.gotc, stats.base_gotc) },
55 	{ "multicast", IGBVF_STAT(stats.mprc, stats.base_mprc) },
56 	{ "lbrx_bytes", IGBVF_STAT(stats.gorlbc, stats.base_gorlbc) },
57 	{ "lbrx_packets", IGBVF_STAT(stats.gprlbc, stats.base_gprlbc) },
58 	{ "tx_restart_queue", IGBVF_STAT(restart_queue, zero_base) },
59 	{ "rx_long_byte_count", IGBVF_STAT(stats.gorc, stats.base_gorc) },
60 	{ "rx_csum_offload_good", IGBVF_STAT(hw_csum_good, zero_base) },
61 	{ "rx_csum_offload_errors", IGBVF_STAT(hw_csum_err, zero_base) },
62 	{ "rx_header_split", IGBVF_STAT(rx_hdr_split, zero_base) },
63 	{ "alloc_rx_buff_failed", IGBVF_STAT(alloc_rx_buff_failed, zero_base) },
64 };
65 
66 #define IGBVF_GLOBAL_STATS_LEN ARRAY_SIZE(igbvf_gstrings_stats)
67 
68 static const char igbvf_gstrings_test[][ETH_GSTRING_LEN] = {
69 	"Link test   (on/offline)"
70 };
71 
72 #define IGBVF_TEST_LEN ARRAY_SIZE(igbvf_gstrings_test)
73 
74 static int igbvf_get_settings(struct net_device *netdev,
75 			      struct ethtool_cmd *ecmd)
76 {
77 	struct igbvf_adapter *adapter = netdev_priv(netdev);
78 	struct e1000_hw *hw = &adapter->hw;
79 	u32 status;
80 
81 	ecmd->supported   = SUPPORTED_1000baseT_Full;
82 
83 	ecmd->advertising = ADVERTISED_1000baseT_Full;
84 
85 	ecmd->port = -1;
86 	ecmd->transceiver = XCVR_DUMMY1;
87 
88 	status = er32(STATUS);
89 	if (status & E1000_STATUS_LU) {
90 		if (status & E1000_STATUS_SPEED_1000)
91 			ethtool_cmd_speed_set(ecmd, SPEED_1000);
92 		else if (status & E1000_STATUS_SPEED_100)
93 			ethtool_cmd_speed_set(ecmd, SPEED_100);
94 		else
95 			ethtool_cmd_speed_set(ecmd, SPEED_10);
96 
97 		if (status & E1000_STATUS_FD)
98 			ecmd->duplex = DUPLEX_FULL;
99 		else
100 			ecmd->duplex = DUPLEX_HALF;
101 	} else {
102 		ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
103 		ecmd->duplex = DUPLEX_UNKNOWN;
104 	}
105 
106 	ecmd->autoneg = AUTONEG_DISABLE;
107 
108 	return 0;
109 }
110 
111 static int igbvf_set_settings(struct net_device *netdev,
112 			      struct ethtool_cmd *ecmd)
113 {
114 	return -EOPNOTSUPP;
115 }
116 
117 static void igbvf_get_pauseparam(struct net_device *netdev,
118 				 struct ethtool_pauseparam *pause)
119 {
120 }
121 
122 static int igbvf_set_pauseparam(struct net_device *netdev,
123 				struct ethtool_pauseparam *pause)
124 {
125 	return -EOPNOTSUPP;
126 }
127 
128 static u32 igbvf_get_msglevel(struct net_device *netdev)
129 {
130 	struct igbvf_adapter *adapter = netdev_priv(netdev);
131 
132 	return adapter->msg_enable;
133 }
134 
135 static void igbvf_set_msglevel(struct net_device *netdev, u32 data)
136 {
137 	struct igbvf_adapter *adapter = netdev_priv(netdev);
138 
139 	adapter->msg_enable = data;
140 }
141 
142 static int igbvf_get_regs_len(struct net_device *netdev)
143 {
144 #define IGBVF_REGS_LEN 8
145 	return IGBVF_REGS_LEN * sizeof(u32);
146 }
147 
148 static void igbvf_get_regs(struct net_device *netdev,
149 			   struct ethtool_regs *regs, void *p)
150 {
151 	struct igbvf_adapter *adapter = netdev_priv(netdev);
152 	struct e1000_hw *hw = &adapter->hw;
153 	u32 *regs_buff = p;
154 
155 	memset(p, 0, IGBVF_REGS_LEN * sizeof(u32));
156 
157 	regs->version = (1 << 24) | (adapter->pdev->revision << 16) |
158 			adapter->pdev->device;
159 
160 	regs_buff[0] = er32(CTRL);
161 	regs_buff[1] = er32(STATUS);
162 
163 	regs_buff[2] = er32(RDLEN(0));
164 	regs_buff[3] = er32(RDH(0));
165 	regs_buff[4] = er32(RDT(0));
166 
167 	regs_buff[5] = er32(TDLEN(0));
168 	regs_buff[6] = er32(TDH(0));
169 	regs_buff[7] = er32(TDT(0));
170 }
171 
172 static int igbvf_get_eeprom_len(struct net_device *netdev)
173 {
174 	return 0;
175 }
176 
177 static int igbvf_get_eeprom(struct net_device *netdev,
178 			    struct ethtool_eeprom *eeprom, u8 *bytes)
179 {
180 	return -EOPNOTSUPP;
181 }
182 
183 static int igbvf_set_eeprom(struct net_device *netdev,
184 			    struct ethtool_eeprom *eeprom, u8 *bytes)
185 {
186 	return -EOPNOTSUPP;
187 }
188 
189 static void igbvf_get_drvinfo(struct net_device *netdev,
190 			      struct ethtool_drvinfo *drvinfo)
191 {
192 	struct igbvf_adapter *adapter = netdev_priv(netdev);
193 
194 	strlcpy(drvinfo->driver,  igbvf_driver_name, sizeof(drvinfo->driver));
195 	strlcpy(drvinfo->version, igbvf_driver_version,
196 		sizeof(drvinfo->version));
197 	strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
198 		sizeof(drvinfo->bus_info));
199 }
200 
201 static void igbvf_get_ringparam(struct net_device *netdev,
202 				struct ethtool_ringparam *ring)
203 {
204 	struct igbvf_adapter *adapter = netdev_priv(netdev);
205 	struct igbvf_ring *tx_ring = adapter->tx_ring;
206 	struct igbvf_ring *rx_ring = adapter->rx_ring;
207 
208 	ring->rx_max_pending = IGBVF_MAX_RXD;
209 	ring->tx_max_pending = IGBVF_MAX_TXD;
210 	ring->rx_pending = rx_ring->count;
211 	ring->tx_pending = tx_ring->count;
212 }
213 
214 static int igbvf_set_ringparam(struct net_device *netdev,
215 			       struct ethtool_ringparam *ring)
216 {
217 	struct igbvf_adapter *adapter = netdev_priv(netdev);
218 	struct igbvf_ring *temp_ring;
219 	int err = 0;
220 	u32 new_rx_count, new_tx_count;
221 
222 	if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
223 		return -EINVAL;
224 
225 	new_rx_count = max_t(u32, ring->rx_pending, IGBVF_MIN_RXD);
226 	new_rx_count = min_t(u32, new_rx_count, IGBVF_MAX_RXD);
227 	new_rx_count = ALIGN(new_rx_count, REQ_RX_DESCRIPTOR_MULTIPLE);
228 
229 	new_tx_count = max_t(u32, ring->tx_pending, IGBVF_MIN_TXD);
230 	new_tx_count = min_t(u32, new_tx_count, IGBVF_MAX_TXD);
231 	new_tx_count = ALIGN(new_tx_count, REQ_TX_DESCRIPTOR_MULTIPLE);
232 
233 	if ((new_tx_count == adapter->tx_ring->count) &&
234 	    (new_rx_count == adapter->rx_ring->count)) {
235 		/* nothing to do */
236 		return 0;
237 	}
238 
239 	while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
240 		usleep_range(1000, 2000);
241 
242 	if (!netif_running(adapter->netdev)) {
243 		adapter->tx_ring->count = new_tx_count;
244 		adapter->rx_ring->count = new_rx_count;
245 		goto clear_reset;
246 	}
247 
248 	temp_ring = vmalloc(sizeof(struct igbvf_ring));
249 	if (!temp_ring) {
250 		err = -ENOMEM;
251 		goto clear_reset;
252 	}
253 
254 	igbvf_down(adapter);
255 
256 	/* We can't just free everything and then setup again,
257 	 * because the ISRs in MSI-X mode get passed pointers
258 	 * to the Tx and Rx ring structs.
259 	 */
260 	if (new_tx_count != adapter->tx_ring->count) {
261 		memcpy(temp_ring, adapter->tx_ring, sizeof(struct igbvf_ring));
262 
263 		temp_ring->count = new_tx_count;
264 		err = igbvf_setup_tx_resources(adapter, temp_ring);
265 		if (err)
266 			goto err_setup;
267 
268 		igbvf_free_tx_resources(adapter->tx_ring);
269 
270 		memcpy(adapter->tx_ring, temp_ring, sizeof(struct igbvf_ring));
271 	}
272 
273 	if (new_rx_count != adapter->rx_ring->count) {
274 		memcpy(temp_ring, adapter->rx_ring, sizeof(struct igbvf_ring));
275 
276 		temp_ring->count = new_rx_count;
277 		err = igbvf_setup_rx_resources(adapter, temp_ring);
278 		if (err)
279 			goto err_setup;
280 
281 		igbvf_free_rx_resources(adapter->rx_ring);
282 
283 		memcpy(adapter->rx_ring, temp_ring, sizeof(struct igbvf_ring));
284 	}
285 err_setup:
286 	igbvf_up(adapter);
287 	vfree(temp_ring);
288 clear_reset:
289 	clear_bit(__IGBVF_RESETTING, &adapter->state);
290 	return err;
291 }
292 
293 static int igbvf_link_test(struct igbvf_adapter *adapter, u64 *data)
294 {
295 	struct e1000_hw *hw = &adapter->hw;
296 	*data = 0;
297 
298 	hw->mac.ops.check_for_link(hw);
299 
300 	if (!(er32(STATUS) & E1000_STATUS_LU))
301 		*data = 1;
302 
303 	return *data;
304 }
305 
306 static void igbvf_diag_test(struct net_device *netdev,
307 			    struct ethtool_test *eth_test, u64 *data)
308 {
309 	struct igbvf_adapter *adapter = netdev_priv(netdev);
310 
311 	set_bit(__IGBVF_TESTING, &adapter->state);
312 
313 	/* Link test performed before hardware reset so autoneg doesn't
314 	 * interfere with test result
315 	 */
316 	if (igbvf_link_test(adapter, &data[0]))
317 		eth_test->flags |= ETH_TEST_FL_FAILED;
318 
319 	clear_bit(__IGBVF_TESTING, &adapter->state);
320 	msleep_interruptible(4 * 1000);
321 }
322 
323 static void igbvf_get_wol(struct net_device *netdev,
324 			  struct ethtool_wolinfo *wol)
325 {
326 	wol->supported = 0;
327 	wol->wolopts = 0;
328 }
329 
330 static int igbvf_set_wol(struct net_device *netdev,
331 			 struct ethtool_wolinfo *wol)
332 {
333 	return -EOPNOTSUPP;
334 }
335 
336 static int igbvf_get_coalesce(struct net_device *netdev,
337 			      struct ethtool_coalesce *ec)
338 {
339 	struct igbvf_adapter *adapter = netdev_priv(netdev);
340 
341 	if (adapter->requested_itr <= 3)
342 		ec->rx_coalesce_usecs = adapter->requested_itr;
343 	else
344 		ec->rx_coalesce_usecs = adapter->current_itr >> 2;
345 
346 	return 0;
347 }
348 
349 static int igbvf_set_coalesce(struct net_device *netdev,
350 			      struct ethtool_coalesce *ec)
351 {
352 	struct igbvf_adapter *adapter = netdev_priv(netdev);
353 	struct e1000_hw *hw = &adapter->hw;
354 
355 	if ((ec->rx_coalesce_usecs >= IGBVF_MIN_ITR_USECS) &&
356 	    (ec->rx_coalesce_usecs <= IGBVF_MAX_ITR_USECS)) {
357 		adapter->current_itr = ec->rx_coalesce_usecs << 2;
358 		adapter->requested_itr = 1000000000 /
359 					(adapter->current_itr * 256);
360 	} else if ((ec->rx_coalesce_usecs == 3) ||
361 		   (ec->rx_coalesce_usecs == 2)) {
362 		adapter->current_itr = IGBVF_START_ITR;
363 		adapter->requested_itr = ec->rx_coalesce_usecs;
364 	} else if (ec->rx_coalesce_usecs == 0) {
365 		/* The user's desire is to turn off interrupt throttling
366 		 * altogether, but due to HW limitations, we can't do that.
367 		 * Instead we set a very small value in EITR, which would
368 		 * allow ~967k interrupts per second, but allow the adapter's
369 		 * internal clocking to still function properly.
370 		 */
371 		adapter->current_itr = 4;
372 		adapter->requested_itr = 1000000000 /
373 					(adapter->current_itr * 256);
374 	} else {
375 		return -EINVAL;
376 	}
377 
378 	writel(adapter->current_itr,
379 	       hw->hw_addr + adapter->rx_ring->itr_register);
380 
381 	return 0;
382 }
383 
384 static int igbvf_nway_reset(struct net_device *netdev)
385 {
386 	struct igbvf_adapter *adapter = netdev_priv(netdev);
387 
388 	if (netif_running(netdev))
389 		igbvf_reinit_locked(adapter);
390 	return 0;
391 }
392 
393 static void igbvf_get_ethtool_stats(struct net_device *netdev,
394 				    struct ethtool_stats *stats,
395 				    u64 *data)
396 {
397 	struct igbvf_adapter *adapter = netdev_priv(netdev);
398 	int i;
399 
400 	igbvf_update_stats(adapter);
401 	for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
402 		char *p = (char *)adapter +
403 			  igbvf_gstrings_stats[i].stat_offset;
404 		char *b = (char *)adapter +
405 			  igbvf_gstrings_stats[i].base_stat_offset;
406 		data[i] = ((igbvf_gstrings_stats[i].sizeof_stat ==
407 			    sizeof(u64)) ? (*(u64 *)p - *(u64 *)b) :
408 			    (*(u32 *)p - *(u32 *)b));
409 	}
410 }
411 
412 static int igbvf_get_sset_count(struct net_device *dev, int stringset)
413 {
414 	switch (stringset) {
415 	case ETH_SS_TEST:
416 		return IGBVF_TEST_LEN;
417 	case ETH_SS_STATS:
418 		return IGBVF_GLOBAL_STATS_LEN;
419 	default:
420 		return -EINVAL;
421 	}
422 }
423 
424 static void igbvf_get_strings(struct net_device *netdev, u32 stringset,
425 			      u8 *data)
426 {
427 	u8 *p = data;
428 	int i;
429 
430 	switch (stringset) {
431 	case ETH_SS_TEST:
432 		memcpy(data, *igbvf_gstrings_test, sizeof(igbvf_gstrings_test));
433 		break;
434 	case ETH_SS_STATS:
435 		for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
436 			memcpy(p, igbvf_gstrings_stats[i].stat_string,
437 			       ETH_GSTRING_LEN);
438 			p += ETH_GSTRING_LEN;
439 		}
440 		break;
441 	}
442 }
443 
444 static const struct ethtool_ops igbvf_ethtool_ops = {
445 	.get_settings		= igbvf_get_settings,
446 	.set_settings		= igbvf_set_settings,
447 	.get_drvinfo		= igbvf_get_drvinfo,
448 	.get_regs_len		= igbvf_get_regs_len,
449 	.get_regs		= igbvf_get_regs,
450 	.get_wol		= igbvf_get_wol,
451 	.set_wol		= igbvf_set_wol,
452 	.get_msglevel		= igbvf_get_msglevel,
453 	.set_msglevel		= igbvf_set_msglevel,
454 	.nway_reset		= igbvf_nway_reset,
455 	.get_link		= ethtool_op_get_link,
456 	.get_eeprom_len		= igbvf_get_eeprom_len,
457 	.get_eeprom		= igbvf_get_eeprom,
458 	.set_eeprom		= igbvf_set_eeprom,
459 	.get_ringparam		= igbvf_get_ringparam,
460 	.set_ringparam		= igbvf_set_ringparam,
461 	.get_pauseparam		= igbvf_get_pauseparam,
462 	.set_pauseparam		= igbvf_set_pauseparam,
463 	.self_test		= igbvf_diag_test,
464 	.get_sset_count		= igbvf_get_sset_count,
465 	.get_strings		= igbvf_get_strings,
466 	.get_ethtool_stats	= igbvf_get_ethtool_stats,
467 	.get_coalesce		= igbvf_get_coalesce,
468 	.set_coalesce		= igbvf_set_coalesce,
469 };
470 
471 void igbvf_set_ethtool_ops(struct net_device *netdev)
472 {
473 	netdev->ethtool_ops = &igbvf_ethtool_ops;
474 }
475