1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2009 - 2018 Intel Corporation. */
3
4/* ethtool support for igbvf */
5
6#include <linux/netdevice.h>
7#include <linux/ethtool.h>
8#include <linux/pci.h>
9#include <linux/vmalloc.h>
10#include <linux/delay.h>
11
12#include "igbvf.h"
13#include <linux/if_vlan.h>
14
15struct igbvf_stats {
16	char stat_string[ETH_GSTRING_LEN];
17	int sizeof_stat;
18	int stat_offset;
19	int base_stat_offset;
20};
21
22#define IGBVF_STAT(current, base) \
23		sizeof(((struct igbvf_adapter *)0)->current), \
24		offsetof(struct igbvf_adapter, current), \
25		offsetof(struct igbvf_adapter, base)
26
27static const struct igbvf_stats igbvf_gstrings_stats[] = {
28	{ "rx_packets", IGBVF_STAT(stats.gprc, stats.base_gprc) },
29	{ "tx_packets", IGBVF_STAT(stats.gptc, stats.base_gptc) },
30	{ "rx_bytes", IGBVF_STAT(stats.gorc, stats.base_gorc) },
31	{ "tx_bytes", IGBVF_STAT(stats.gotc, stats.base_gotc) },
32	{ "multicast", IGBVF_STAT(stats.mprc, stats.base_mprc) },
33	{ "lbrx_bytes", IGBVF_STAT(stats.gorlbc, stats.base_gorlbc) },
34	{ "lbrx_packets", IGBVF_STAT(stats.gprlbc, stats.base_gprlbc) },
35	{ "tx_restart_queue", IGBVF_STAT(restart_queue, zero_base) },
36	{ "rx_long_byte_count", IGBVF_STAT(stats.gorc, stats.base_gorc) },
37	{ "rx_csum_offload_good", IGBVF_STAT(hw_csum_good, zero_base) },
38	{ "rx_csum_offload_errors", IGBVF_STAT(hw_csum_err, zero_base) },
39	{ "rx_header_split", IGBVF_STAT(rx_hdr_split, zero_base) },
40	{ "alloc_rx_buff_failed", IGBVF_STAT(alloc_rx_buff_failed, zero_base) },
41};
42
43#define IGBVF_GLOBAL_STATS_LEN ARRAY_SIZE(igbvf_gstrings_stats)
44
45static const char igbvf_gstrings_test[][ETH_GSTRING_LEN] = {
46	"Link test   (on/offline)"
47};
48
49#define IGBVF_TEST_LEN ARRAY_SIZE(igbvf_gstrings_test)
50
51static int igbvf_get_link_ksettings(struct net_device *netdev,
52				    struct ethtool_link_ksettings *cmd)
53{
54	struct igbvf_adapter *adapter = netdev_priv(netdev);
55	struct e1000_hw *hw = &adapter->hw;
56	u32 status;
57
58	ethtool_link_ksettings_zero_link_mode(cmd, supported);
59	ethtool_link_ksettings_add_link_mode(cmd, supported, 1000baseT_Full);
60	ethtool_link_ksettings_zero_link_mode(cmd, advertising);
61	ethtool_link_ksettings_add_link_mode(cmd, advertising, 1000baseT_Full);
62
63	cmd->base.port = -1;
64
65	status = er32(STATUS);
66	if (status & E1000_STATUS_LU) {
67		if (status & E1000_STATUS_SPEED_1000)
68			cmd->base.speed = SPEED_1000;
69		else if (status & E1000_STATUS_SPEED_100)
70			cmd->base.speed = SPEED_100;
71		else
72			cmd->base.speed = SPEED_10;
73
74		if (status & E1000_STATUS_FD)
75			cmd->base.duplex = DUPLEX_FULL;
76		else
77			cmd->base.duplex = DUPLEX_HALF;
78	} else {
79		cmd->base.speed = SPEED_UNKNOWN;
80		cmd->base.duplex = DUPLEX_UNKNOWN;
81	}
82
83	cmd->base.autoneg = AUTONEG_DISABLE;
84
85	return 0;
86}
87
88static int igbvf_set_link_ksettings(struct net_device *netdev,
89				    const struct ethtool_link_ksettings *cmd)
90{
91	return -EOPNOTSUPP;
92}
93
94static void igbvf_get_pauseparam(struct net_device *netdev,
95				 struct ethtool_pauseparam *pause)
96{
97}
98
99static int igbvf_set_pauseparam(struct net_device *netdev,
100				struct ethtool_pauseparam *pause)
101{
102	return -EOPNOTSUPP;
103}
104
105static u32 igbvf_get_msglevel(struct net_device *netdev)
106{
107	struct igbvf_adapter *adapter = netdev_priv(netdev);
108
109	return adapter->msg_enable;
110}
111
112static void igbvf_set_msglevel(struct net_device *netdev, u32 data)
113{
114	struct igbvf_adapter *adapter = netdev_priv(netdev);
115
116	adapter->msg_enable = data;
117}
118
119static int igbvf_get_regs_len(struct net_device *netdev)
120{
121#define IGBVF_REGS_LEN 8
122	return IGBVF_REGS_LEN * sizeof(u32);
123}
124
125static void igbvf_get_regs(struct net_device *netdev,
126			   struct ethtool_regs *regs, void *p)
127{
128	struct igbvf_adapter *adapter = netdev_priv(netdev);
129	struct e1000_hw *hw = &adapter->hw;
130	u32 *regs_buff = p;
131
132	memset(p, 0, IGBVF_REGS_LEN * sizeof(u32));
133
134	regs->version = (1u << 24) |
135			(adapter->pdev->revision << 16) |
136			adapter->pdev->device;
137
138	regs_buff[0] = er32(CTRL);
139	regs_buff[1] = er32(STATUS);
140
141	regs_buff[2] = er32(RDLEN(0));
142	regs_buff[3] = er32(RDH(0));
143	regs_buff[4] = er32(RDT(0));
144
145	regs_buff[5] = er32(TDLEN(0));
146	regs_buff[6] = er32(TDH(0));
147	regs_buff[7] = er32(TDT(0));
148}
149
150static int igbvf_get_eeprom_len(struct net_device *netdev)
151{
152	return 0;
153}
154
155static int igbvf_get_eeprom(struct net_device *netdev,
156			    struct ethtool_eeprom *eeprom, u8 *bytes)
157{
158	return -EOPNOTSUPP;
159}
160
161static int igbvf_set_eeprom(struct net_device *netdev,
162			    struct ethtool_eeprom *eeprom, u8 *bytes)
163{
164	return -EOPNOTSUPP;
165}
166
167static void igbvf_get_drvinfo(struct net_device *netdev,
168			      struct ethtool_drvinfo *drvinfo)
169{
170	struct igbvf_adapter *adapter = netdev_priv(netdev);
171
172	strscpy(drvinfo->driver,  igbvf_driver_name, sizeof(drvinfo->driver));
173	strscpy(drvinfo->bus_info, pci_name(adapter->pdev),
174		sizeof(drvinfo->bus_info));
175}
176
177static void igbvf_get_ringparam(struct net_device *netdev,
178				struct ethtool_ringparam *ring,
179				struct kernel_ethtool_ringparam *kernel_ring,
180				struct netlink_ext_ack *extack)
181{
182	struct igbvf_adapter *adapter = netdev_priv(netdev);
183	struct igbvf_ring *tx_ring = adapter->tx_ring;
184	struct igbvf_ring *rx_ring = adapter->rx_ring;
185
186	ring->rx_max_pending = IGBVF_MAX_RXD;
187	ring->tx_max_pending = IGBVF_MAX_TXD;
188	ring->rx_pending = rx_ring->count;
189	ring->tx_pending = tx_ring->count;
190}
191
192static int igbvf_set_ringparam(struct net_device *netdev,
193			       struct ethtool_ringparam *ring,
194			       struct kernel_ethtool_ringparam *kernel_ring,
195			       struct netlink_ext_ack *extack)
196{
197	struct igbvf_adapter *adapter = netdev_priv(netdev);
198	struct igbvf_ring *temp_ring;
199	int err = 0;
200	u32 new_rx_count, new_tx_count;
201
202	if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
203		return -EINVAL;
204
205	new_rx_count = max_t(u32, ring->rx_pending, IGBVF_MIN_RXD);
206	new_rx_count = min_t(u32, new_rx_count, IGBVF_MAX_RXD);
207	new_rx_count = ALIGN(new_rx_count, REQ_RX_DESCRIPTOR_MULTIPLE);
208
209	new_tx_count = max_t(u32, ring->tx_pending, IGBVF_MIN_TXD);
210	new_tx_count = min_t(u32, new_tx_count, IGBVF_MAX_TXD);
211	new_tx_count = ALIGN(new_tx_count, REQ_TX_DESCRIPTOR_MULTIPLE);
212
213	if ((new_tx_count == adapter->tx_ring->count) &&
214	    (new_rx_count == adapter->rx_ring->count)) {
215		/* nothing to do */
216		return 0;
217	}
218
219	while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
220		usleep_range(1000, 2000);
221
222	if (!netif_running(adapter->netdev)) {
223		adapter->tx_ring->count = new_tx_count;
224		adapter->rx_ring->count = new_rx_count;
225		goto clear_reset;
226	}
227
228	temp_ring = vmalloc(sizeof(struct igbvf_ring));
229	if (!temp_ring) {
230		err = -ENOMEM;
231		goto clear_reset;
232	}
233
234	igbvf_down(adapter);
235
236	/* We can't just free everything and then setup again,
237	 * because the ISRs in MSI-X mode get passed pointers
238	 * to the Tx and Rx ring structs.
239	 */
240	if (new_tx_count != adapter->tx_ring->count) {
241		memcpy(temp_ring, adapter->tx_ring, sizeof(struct igbvf_ring));
242
243		temp_ring->count = new_tx_count;
244		err = igbvf_setup_tx_resources(adapter, temp_ring);
245		if (err)
246			goto err_setup;
247
248		igbvf_free_tx_resources(adapter->tx_ring);
249
250		memcpy(adapter->tx_ring, temp_ring, sizeof(struct igbvf_ring));
251	}
252
253	if (new_rx_count != adapter->rx_ring->count) {
254		memcpy(temp_ring, adapter->rx_ring, sizeof(struct igbvf_ring));
255
256		temp_ring->count = new_rx_count;
257		err = igbvf_setup_rx_resources(adapter, temp_ring);
258		if (err)
259			goto err_setup;
260
261		igbvf_free_rx_resources(adapter->rx_ring);
262
263		memcpy(adapter->rx_ring, temp_ring, sizeof(struct igbvf_ring));
264	}
265err_setup:
266	igbvf_up(adapter);
267	vfree(temp_ring);
268clear_reset:
269	clear_bit(__IGBVF_RESETTING, &adapter->state);
270	return err;
271}
272
273static int igbvf_link_test(struct igbvf_adapter *adapter, u64 *data)
274{
275	struct e1000_hw *hw = &adapter->hw;
276	*data = 0;
277
278	spin_lock_bh(&hw->mbx_lock);
279
280	hw->mac.ops.check_for_link(hw);
281
282	spin_unlock_bh(&hw->mbx_lock);
283
284	if (!(er32(STATUS) & E1000_STATUS_LU))
285		*data = 1;
286
287	return *data;
288}
289
290static void igbvf_diag_test(struct net_device *netdev,
291			    struct ethtool_test *eth_test, u64 *data)
292{
293	struct igbvf_adapter *adapter = netdev_priv(netdev);
294
295	set_bit(__IGBVF_TESTING, &adapter->state);
296
297	/* Link test performed before hardware reset so autoneg doesn't
298	 * interfere with test result
299	 */
300	if (igbvf_link_test(adapter, &data[0]))
301		eth_test->flags |= ETH_TEST_FL_FAILED;
302
303	clear_bit(__IGBVF_TESTING, &adapter->state);
304	msleep_interruptible(4 * 1000);
305}
306
307static void igbvf_get_wol(struct net_device *netdev,
308			  struct ethtool_wolinfo *wol)
309{
310	wol->supported = 0;
311	wol->wolopts = 0;
312}
313
314static int igbvf_set_wol(struct net_device *netdev,
315			 struct ethtool_wolinfo *wol)
316{
317	return -EOPNOTSUPP;
318}
319
320static int igbvf_get_coalesce(struct net_device *netdev,
321			      struct ethtool_coalesce *ec,
322			      struct kernel_ethtool_coalesce *kernel_coal,
323			      struct netlink_ext_ack *extack)
324{
325	struct igbvf_adapter *adapter = netdev_priv(netdev);
326
327	if (adapter->requested_itr <= 3)
328		ec->rx_coalesce_usecs = adapter->requested_itr;
329	else
330		ec->rx_coalesce_usecs = adapter->current_itr >> 2;
331
332	return 0;
333}
334
335static int igbvf_set_coalesce(struct net_device *netdev,
336			      struct ethtool_coalesce *ec,
337			      struct kernel_ethtool_coalesce *kernel_coal,
338			      struct netlink_ext_ack *extack)
339{
340	struct igbvf_adapter *adapter = netdev_priv(netdev);
341	struct e1000_hw *hw = &adapter->hw;
342
343	if ((ec->rx_coalesce_usecs >= IGBVF_MIN_ITR_USECS) &&
344	    (ec->rx_coalesce_usecs <= IGBVF_MAX_ITR_USECS)) {
345		adapter->current_itr = ec->rx_coalesce_usecs << 2;
346		adapter->requested_itr = 1000000000 /
347					(adapter->current_itr * 256);
348	} else if ((ec->rx_coalesce_usecs == 3) ||
349		   (ec->rx_coalesce_usecs == 2)) {
350		adapter->current_itr = IGBVF_START_ITR;
351		adapter->requested_itr = ec->rx_coalesce_usecs;
352	} else if (ec->rx_coalesce_usecs == 0) {
353		/* The user's desire is to turn off interrupt throttling
354		 * altogether, but due to HW limitations, we can't do that.
355		 * Instead we set a very small value in EITR, which would
356		 * allow ~967k interrupts per second, but allow the adapter's
357		 * internal clocking to still function properly.
358		 */
359		adapter->current_itr = 4;
360		adapter->requested_itr = 1000000000 /
361					(adapter->current_itr * 256);
362	} else {
363		return -EINVAL;
364	}
365
366	writel(adapter->current_itr,
367	       hw->hw_addr + adapter->rx_ring->itr_register);
368
369	return 0;
370}
371
372static int igbvf_nway_reset(struct net_device *netdev)
373{
374	struct igbvf_adapter *adapter = netdev_priv(netdev);
375
376	if (netif_running(netdev))
377		igbvf_reinit_locked(adapter);
378	return 0;
379}
380
381static void igbvf_get_ethtool_stats(struct net_device *netdev,
382				    struct ethtool_stats *stats,
383				    u64 *data)
384{
385	struct igbvf_adapter *adapter = netdev_priv(netdev);
386	int i;
387
388	igbvf_update_stats(adapter);
389	for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
390		char *p = (char *)adapter +
391			  igbvf_gstrings_stats[i].stat_offset;
392		char *b = (char *)adapter +
393			  igbvf_gstrings_stats[i].base_stat_offset;
394		data[i] = ((igbvf_gstrings_stats[i].sizeof_stat ==
395			    sizeof(u64)) ? (*(u64 *)p - *(u64 *)b) :
396			    (*(u32 *)p - *(u32 *)b));
397	}
398}
399
400static int igbvf_get_sset_count(struct net_device *dev, int stringset)
401{
402	switch (stringset) {
403	case ETH_SS_TEST:
404		return IGBVF_TEST_LEN;
405	case ETH_SS_STATS:
406		return IGBVF_GLOBAL_STATS_LEN;
407	default:
408		return -EINVAL;
409	}
410}
411
412static void igbvf_get_strings(struct net_device *netdev, u32 stringset,
413			      u8 *data)
414{
415	u8 *p = data;
416	int i;
417
418	switch (stringset) {
419	case ETH_SS_TEST:
420		memcpy(data, *igbvf_gstrings_test, sizeof(igbvf_gstrings_test));
421		break;
422	case ETH_SS_STATS:
423		for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
424			memcpy(p, igbvf_gstrings_stats[i].stat_string,
425			       ETH_GSTRING_LEN);
426			p += ETH_GSTRING_LEN;
427		}
428		break;
429	}
430}
431
432static const struct ethtool_ops igbvf_ethtool_ops = {
433	.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
434	.get_drvinfo		= igbvf_get_drvinfo,
435	.get_regs_len		= igbvf_get_regs_len,
436	.get_regs		= igbvf_get_regs,
437	.get_wol		= igbvf_get_wol,
438	.set_wol		= igbvf_set_wol,
439	.get_msglevel		= igbvf_get_msglevel,
440	.set_msglevel		= igbvf_set_msglevel,
441	.nway_reset		= igbvf_nway_reset,
442	.get_link		= ethtool_op_get_link,
443	.get_eeprom_len		= igbvf_get_eeprom_len,
444	.get_eeprom		= igbvf_get_eeprom,
445	.set_eeprom		= igbvf_set_eeprom,
446	.get_ringparam		= igbvf_get_ringparam,
447	.set_ringparam		= igbvf_set_ringparam,
448	.get_pauseparam		= igbvf_get_pauseparam,
449	.set_pauseparam		= igbvf_set_pauseparam,
450	.self_test		= igbvf_diag_test,
451	.get_sset_count		= igbvf_get_sset_count,
452	.get_strings		= igbvf_get_strings,
453	.get_ethtool_stats	= igbvf_get_ethtool_stats,
454	.get_coalesce		= igbvf_get_coalesce,
455	.set_coalesce		= igbvf_set_coalesce,
456	.get_link_ksettings	= igbvf_get_link_ksettings,
457	.set_link_ksettings	= igbvf_set_link_ksettings,
458};
459
460void igbvf_set_ethtool_ops(struct net_device *netdev)
461{
462	netdev->ethtool_ops = &igbvf_ethtool_ops;
463}
464