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