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
38struct 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
50static 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
68static 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
74static 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
111static int igbvf_set_settings(struct net_device *netdev,
112			      struct ethtool_cmd *ecmd)
113{
114	return -EOPNOTSUPP;
115}
116
117static void igbvf_get_pauseparam(struct net_device *netdev,
118				 struct ethtool_pauseparam *pause)
119{
120}
121
122static int igbvf_set_pauseparam(struct net_device *netdev,
123				struct ethtool_pauseparam *pause)
124{
125	return -EOPNOTSUPP;
126}
127
128static 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
135static 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
142static 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
148static 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
172static int igbvf_get_eeprom_len(struct net_device *netdev)
173{
174	return 0;
175}
176
177static int igbvf_get_eeprom(struct net_device *netdev,
178			    struct ethtool_eeprom *eeprom, u8 *bytes)
179{
180	return -EOPNOTSUPP;
181}
182
183static int igbvf_set_eeprom(struct net_device *netdev,
184			    struct ethtool_eeprom *eeprom, u8 *bytes)
185{
186	return -EOPNOTSUPP;
187}
188
189static 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	drvinfo->regdump_len = igbvf_get_regs_len(netdev);
200	drvinfo->eedump_len = igbvf_get_eeprom_len(netdev);
201}
202
203static void igbvf_get_ringparam(struct net_device *netdev,
204				struct ethtool_ringparam *ring)
205{
206	struct igbvf_adapter *adapter = netdev_priv(netdev);
207	struct igbvf_ring *tx_ring = adapter->tx_ring;
208	struct igbvf_ring *rx_ring = adapter->rx_ring;
209
210	ring->rx_max_pending = IGBVF_MAX_RXD;
211	ring->tx_max_pending = IGBVF_MAX_TXD;
212	ring->rx_pending = rx_ring->count;
213	ring->tx_pending = tx_ring->count;
214}
215
216static int igbvf_set_ringparam(struct net_device *netdev,
217			       struct ethtool_ringparam *ring)
218{
219	struct igbvf_adapter *adapter = netdev_priv(netdev);
220	struct igbvf_ring *temp_ring;
221	int err = 0;
222	u32 new_rx_count, new_tx_count;
223
224	if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
225		return -EINVAL;
226
227	new_rx_count = max_t(u32, ring->rx_pending, IGBVF_MIN_RXD);
228	new_rx_count = min_t(u32, new_rx_count, IGBVF_MAX_RXD);
229	new_rx_count = ALIGN(new_rx_count, REQ_RX_DESCRIPTOR_MULTIPLE);
230
231	new_tx_count = max_t(u32, ring->tx_pending, IGBVF_MIN_TXD);
232	new_tx_count = min_t(u32, new_tx_count, IGBVF_MAX_TXD);
233	new_tx_count = ALIGN(new_tx_count, REQ_TX_DESCRIPTOR_MULTIPLE);
234
235	if ((new_tx_count == adapter->tx_ring->count) &&
236	    (new_rx_count == adapter->rx_ring->count)) {
237		/* nothing to do */
238		return 0;
239	}
240
241	while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
242		usleep_range(1000, 2000);
243
244	if (!netif_running(adapter->netdev)) {
245		adapter->tx_ring->count = new_tx_count;
246		adapter->rx_ring->count = new_rx_count;
247		goto clear_reset;
248	}
249
250	temp_ring = vmalloc(sizeof(struct igbvf_ring));
251	if (!temp_ring) {
252		err = -ENOMEM;
253		goto clear_reset;
254	}
255
256	igbvf_down(adapter);
257
258	/* We can't just free everything and then setup again,
259	 * because the ISRs in MSI-X mode get passed pointers
260	 * to the Tx and Rx ring structs.
261	 */
262	if (new_tx_count != adapter->tx_ring->count) {
263		memcpy(temp_ring, adapter->tx_ring, sizeof(struct igbvf_ring));
264
265		temp_ring->count = new_tx_count;
266		err = igbvf_setup_tx_resources(adapter, temp_ring);
267		if (err)
268			goto err_setup;
269
270		igbvf_free_tx_resources(adapter->tx_ring);
271
272		memcpy(adapter->tx_ring, temp_ring, sizeof(struct igbvf_ring));
273	}
274
275	if (new_rx_count != adapter->rx_ring->count) {
276		memcpy(temp_ring, adapter->rx_ring, sizeof(struct igbvf_ring));
277
278		temp_ring->count = new_rx_count;
279		err = igbvf_setup_rx_resources(adapter, temp_ring);
280		if (err)
281			goto err_setup;
282
283		igbvf_free_rx_resources(adapter->rx_ring);
284
285		memcpy(adapter->rx_ring, temp_ring, sizeof(struct igbvf_ring));
286	}
287err_setup:
288	igbvf_up(adapter);
289	vfree(temp_ring);
290clear_reset:
291	clear_bit(__IGBVF_RESETTING, &adapter->state);
292	return err;
293}
294
295static int igbvf_link_test(struct igbvf_adapter *adapter, u64 *data)
296{
297	struct e1000_hw *hw = &adapter->hw;
298	*data = 0;
299
300	hw->mac.ops.check_for_link(hw);
301
302	if (!(er32(STATUS) & E1000_STATUS_LU))
303		*data = 1;
304
305	return *data;
306}
307
308static void igbvf_diag_test(struct net_device *netdev,
309			    struct ethtool_test *eth_test, u64 *data)
310{
311	struct igbvf_adapter *adapter = netdev_priv(netdev);
312
313	set_bit(__IGBVF_TESTING, &adapter->state);
314
315	/* Link test performed before hardware reset so autoneg doesn't
316	 * interfere with test result
317	 */
318	if (igbvf_link_test(adapter, &data[0]))
319		eth_test->flags |= ETH_TEST_FL_FAILED;
320
321	clear_bit(__IGBVF_TESTING, &adapter->state);
322	msleep_interruptible(4 * 1000);
323}
324
325static void igbvf_get_wol(struct net_device *netdev,
326			  struct ethtool_wolinfo *wol)
327{
328	wol->supported = 0;
329	wol->wolopts = 0;
330}
331
332static int igbvf_set_wol(struct net_device *netdev,
333			 struct ethtool_wolinfo *wol)
334{
335	return -EOPNOTSUPP;
336}
337
338static int igbvf_get_coalesce(struct net_device *netdev,
339			      struct ethtool_coalesce *ec)
340{
341	struct igbvf_adapter *adapter = netdev_priv(netdev);
342
343	if (adapter->requested_itr <= 3)
344		ec->rx_coalesce_usecs = adapter->requested_itr;
345	else
346		ec->rx_coalesce_usecs = adapter->current_itr >> 2;
347
348	return 0;
349}
350
351static int igbvf_set_coalesce(struct net_device *netdev,
352			      struct ethtool_coalesce *ec)
353{
354	struct igbvf_adapter *adapter = netdev_priv(netdev);
355	struct e1000_hw *hw = &adapter->hw;
356
357	if ((ec->rx_coalesce_usecs >= IGBVF_MIN_ITR_USECS) &&
358	    (ec->rx_coalesce_usecs <= IGBVF_MAX_ITR_USECS)) {
359		adapter->current_itr = ec->rx_coalesce_usecs << 2;
360		adapter->requested_itr = 1000000000 /
361					(adapter->current_itr * 256);
362	} else if ((ec->rx_coalesce_usecs == 3) ||
363		   (ec->rx_coalesce_usecs == 2)) {
364		adapter->current_itr = IGBVF_START_ITR;
365		adapter->requested_itr = ec->rx_coalesce_usecs;
366	} else if (ec->rx_coalesce_usecs == 0) {
367		/* The user's desire is to turn off interrupt throttling
368		 * altogether, but due to HW limitations, we can't do that.
369		 * Instead we set a very small value in EITR, which would
370		 * allow ~967k interrupts per second, but allow the adapter's
371		 * internal clocking to still function properly.
372		 */
373		adapter->current_itr = 4;
374		adapter->requested_itr = 1000000000 /
375					(adapter->current_itr * 256);
376	} else {
377		return -EINVAL;
378	}
379
380	writel(adapter->current_itr,
381	       hw->hw_addr + adapter->rx_ring->itr_register);
382
383	return 0;
384}
385
386static int igbvf_nway_reset(struct net_device *netdev)
387{
388	struct igbvf_adapter *adapter = netdev_priv(netdev);
389
390	if (netif_running(netdev))
391		igbvf_reinit_locked(adapter);
392	return 0;
393}
394
395static void igbvf_get_ethtool_stats(struct net_device *netdev,
396				    struct ethtool_stats *stats,
397				    u64 *data)
398{
399	struct igbvf_adapter *adapter = netdev_priv(netdev);
400	int i;
401
402	igbvf_update_stats(adapter);
403	for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
404		char *p = (char *)adapter +
405			  igbvf_gstrings_stats[i].stat_offset;
406		char *b = (char *)adapter +
407			  igbvf_gstrings_stats[i].base_stat_offset;
408		data[i] = ((igbvf_gstrings_stats[i].sizeof_stat ==
409			    sizeof(u64)) ? (*(u64 *)p - *(u64 *)b) :
410			    (*(u32 *)p - *(u32 *)b));
411	}
412}
413
414static int igbvf_get_sset_count(struct net_device *dev, int stringset)
415{
416	switch (stringset) {
417	case ETH_SS_TEST:
418		return IGBVF_TEST_LEN;
419	case ETH_SS_STATS:
420		return IGBVF_GLOBAL_STATS_LEN;
421	default:
422		return -EINVAL;
423	}
424}
425
426static void igbvf_get_strings(struct net_device *netdev, u32 stringset,
427			      u8 *data)
428{
429	u8 *p = data;
430	int i;
431
432	switch (stringset) {
433	case ETH_SS_TEST:
434		memcpy(data, *igbvf_gstrings_test, sizeof(igbvf_gstrings_test));
435		break;
436	case ETH_SS_STATS:
437		for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
438			memcpy(p, igbvf_gstrings_stats[i].stat_string,
439			       ETH_GSTRING_LEN);
440			p += ETH_GSTRING_LEN;
441		}
442		break;
443	}
444}
445
446static const struct ethtool_ops igbvf_ethtool_ops = {
447	.get_settings		= igbvf_get_settings,
448	.set_settings		= igbvf_set_settings,
449	.get_drvinfo		= igbvf_get_drvinfo,
450	.get_regs_len		= igbvf_get_regs_len,
451	.get_regs		= igbvf_get_regs,
452	.get_wol		= igbvf_get_wol,
453	.set_wol		= igbvf_set_wol,
454	.get_msglevel		= igbvf_get_msglevel,
455	.set_msglevel		= igbvf_set_msglevel,
456	.nway_reset		= igbvf_nway_reset,
457	.get_link		= ethtool_op_get_link,
458	.get_eeprom_len		= igbvf_get_eeprom_len,
459	.get_eeprom		= igbvf_get_eeprom,
460	.set_eeprom		= igbvf_set_eeprom,
461	.get_ringparam		= igbvf_get_ringparam,
462	.set_ringparam		= igbvf_set_ringparam,
463	.get_pauseparam		= igbvf_get_pauseparam,
464	.set_pauseparam		= igbvf_set_pauseparam,
465	.self_test		= igbvf_diag_test,
466	.get_sset_count		= igbvf_get_sset_count,
467	.get_strings		= igbvf_get_strings,
468	.get_ethtool_stats	= igbvf_get_ethtool_stats,
469	.get_coalesce		= igbvf_get_coalesce,
470	.set_coalesce		= igbvf_set_coalesce,
471};
472
473void igbvf_set_ethtool_ops(struct net_device *netdev)
474{
475	netdev->ethtool_ops = &igbvf_ethtool_ops;
476}
477