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}
200
201static 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
214static 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	}
285err_setup:
286	igbvf_up(adapter);
287	vfree(temp_ring);
288clear_reset:
289	clear_bit(__IGBVF_RESETTING, &adapter->state);
290	return err;
291}
292
293static 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
306static 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
323static void igbvf_get_wol(struct net_device *netdev,
324			  struct ethtool_wolinfo *wol)
325{
326	wol->supported = 0;
327	wol->wolopts = 0;
328}
329
330static int igbvf_set_wol(struct net_device *netdev,
331			 struct ethtool_wolinfo *wol)
332{
333	return -EOPNOTSUPP;
334}
335
336static 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
349static 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
384static 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
393static 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
412static 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
424static 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
444static 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
471void igbvf_set_ethtool_ops(struct net_device *netdev)
472{
473	netdev->ethtool_ops = &igbvf_ethtool_ops;
474}
475