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Merge remote-tracking branch 'md/for-next'
[deliverable/linux.git] / drivers / net / ethernet / netronome / nfp / nfp_net_ethtool.c
1 /*
2 * Copyright (C) 2015 Netronome Systems, Inc.
3 *
4 * This software is dual licensed under the GNU General License Version 2,
5 * June 1991 as shown in the file COPYING in the top-level directory of this
6 * source tree or the BSD 2-Clause License provided below. You have the
7 * option to license this software under the complete terms of either license.
8 *
9 * The BSD 2-Clause License:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * 1. Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * 2. Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 /*
35 * nfp_net_ethtool.c
36 * Netronome network device driver: ethtool support
37 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
38 * Jason McMullan <jason.mcmullan@netronome.com>
39 * Rolf Neugebauer <rolf.neugebauer@netronome.com>
40 * Brad Petrus <brad.petrus@netronome.com>
41 */
42
43 #include <linux/kernel.h>
44 #include <linux/netdevice.h>
45 #include <linux/etherdevice.h>
46 #include <linux/interrupt.h>
47 #include <linux/pci.h>
48 #include <linux/ethtool.h>
49
50 #include "nfp_net_ctrl.h"
51 #include "nfp_net.h"
52
53 /* Support for stats. Returns netdev, driver, and device stats */
54 enum { NETDEV_ET_STATS, NFP_NET_DRV_ET_STATS, NFP_NET_DEV_ET_STATS };
55 struct _nfp_net_et_stats {
56 char name[ETH_GSTRING_LEN];
57 int type;
58 int sz;
59 int off;
60 };
61
62 #define NN_ET_NETDEV_STAT(m) NETDEV_ET_STATS, \
63 FIELD_SIZEOF(struct net_device_stats, m), \
64 offsetof(struct net_device_stats, m)
65 /* For stats in the control BAR (other than Q stats) */
66 #define NN_ET_DEV_STAT(m) NFP_NET_DEV_ET_STATS, \
67 sizeof(u64), \
68 (m)
69 static const struct _nfp_net_et_stats nfp_net_et_stats[] = {
70 /* netdev stats */
71 {"rx_packets", NN_ET_NETDEV_STAT(rx_packets)},
72 {"tx_packets", NN_ET_NETDEV_STAT(tx_packets)},
73 {"rx_bytes", NN_ET_NETDEV_STAT(rx_bytes)},
74 {"tx_bytes", NN_ET_NETDEV_STAT(tx_bytes)},
75 {"rx_errors", NN_ET_NETDEV_STAT(rx_errors)},
76 {"tx_errors", NN_ET_NETDEV_STAT(tx_errors)},
77 {"rx_dropped", NN_ET_NETDEV_STAT(rx_dropped)},
78 {"tx_dropped", NN_ET_NETDEV_STAT(tx_dropped)},
79 {"multicast", NN_ET_NETDEV_STAT(multicast)},
80 {"collisions", NN_ET_NETDEV_STAT(collisions)},
81 {"rx_over_errors", NN_ET_NETDEV_STAT(rx_over_errors)},
82 {"rx_crc_errors", NN_ET_NETDEV_STAT(rx_crc_errors)},
83 {"rx_frame_errors", NN_ET_NETDEV_STAT(rx_frame_errors)},
84 {"rx_fifo_errors", NN_ET_NETDEV_STAT(rx_fifo_errors)},
85 {"rx_missed_errors", NN_ET_NETDEV_STAT(rx_missed_errors)},
86 {"tx_aborted_errors", NN_ET_NETDEV_STAT(tx_aborted_errors)},
87 {"tx_carrier_errors", NN_ET_NETDEV_STAT(tx_carrier_errors)},
88 {"tx_fifo_errors", NN_ET_NETDEV_STAT(tx_fifo_errors)},
89 /* Stats from the device */
90 {"dev_rx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_DISCARDS)},
91 {"dev_rx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_ERRORS)},
92 {"dev_rx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_OCTETS)},
93 {"dev_rx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_UC_OCTETS)},
94 {"dev_rx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_OCTETS)},
95 {"dev_rx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_OCTETS)},
96 {"dev_rx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_FRAMES)},
97 {"dev_rx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_FRAMES)},
98 {"dev_rx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_FRAMES)},
99
100 {"dev_tx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_DISCARDS)},
101 {"dev_tx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_ERRORS)},
102 {"dev_tx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_OCTETS)},
103 {"dev_tx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_UC_OCTETS)},
104 {"dev_tx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_OCTETS)},
105 {"dev_tx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_OCTETS)},
106 {"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES)},
107 {"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES)},
108 {"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES)},
109 };
110
111 #define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats)
112 #define NN_ET_RVEC_STATS_LEN (nn->num_r_vecs * 3)
113 #define NN_ET_RVEC_GATHER_STATS 7
114 #define NN_ET_QUEUE_STATS_LEN ((nn->num_tx_rings + nn->num_rx_rings) * 2)
115 #define NN_ET_STATS_LEN (NN_ET_GLOBAL_STATS_LEN + NN_ET_RVEC_GATHER_STATS + \
116 NN_ET_RVEC_STATS_LEN + NN_ET_QUEUE_STATS_LEN)
117
118 static void nfp_net_get_drvinfo(struct net_device *netdev,
119 struct ethtool_drvinfo *drvinfo)
120 {
121 struct nfp_net *nn = netdev_priv(netdev);
122
123 strlcpy(drvinfo->driver, nfp_net_driver_name, sizeof(drvinfo->driver));
124 strlcpy(drvinfo->version, nfp_net_driver_version,
125 sizeof(drvinfo->version));
126
127 snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
128 "%d.%d.%d.%d",
129 nn->fw_ver.resv, nn->fw_ver.class,
130 nn->fw_ver.major, nn->fw_ver.minor);
131 strlcpy(drvinfo->bus_info, pci_name(nn->pdev),
132 sizeof(drvinfo->bus_info));
133
134 drvinfo->n_stats = NN_ET_STATS_LEN;
135 drvinfo->regdump_len = NFP_NET_CFG_BAR_SZ;
136 }
137
138 static void nfp_net_get_ringparam(struct net_device *netdev,
139 struct ethtool_ringparam *ring)
140 {
141 struct nfp_net *nn = netdev_priv(netdev);
142
143 ring->rx_max_pending = NFP_NET_MAX_RX_DESCS;
144 ring->tx_max_pending = NFP_NET_MAX_TX_DESCS;
145 ring->rx_pending = nn->rxd_cnt;
146 ring->tx_pending = nn->txd_cnt;
147 }
148
149 static int nfp_net_set_ringparam(struct net_device *netdev,
150 struct ethtool_ringparam *ring)
151 {
152 struct nfp_net *nn = netdev_priv(netdev);
153 u32 rxd_cnt, txd_cnt;
154
155 /* We don't have separate queues/rings for small/large frames. */
156 if (ring->rx_mini_pending || ring->rx_jumbo_pending)
157 return -EINVAL;
158
159 /* Round up to supported values */
160 rxd_cnt = roundup_pow_of_two(ring->rx_pending);
161 txd_cnt = roundup_pow_of_two(ring->tx_pending);
162
163 if (rxd_cnt < NFP_NET_MIN_RX_DESCS || rxd_cnt > NFP_NET_MAX_RX_DESCS ||
164 txd_cnt < NFP_NET_MIN_TX_DESCS || txd_cnt > NFP_NET_MAX_TX_DESCS)
165 return -EINVAL;
166
167 if (nn->rxd_cnt == rxd_cnt && nn->txd_cnt == txd_cnt)
168 return 0;
169
170 nn_dbg(nn, "Change ring size: RxQ %u->%u, TxQ %u->%u\n",
171 nn->rxd_cnt, rxd_cnt, nn->txd_cnt, txd_cnt);
172
173 return nfp_net_set_ring_size(nn, rxd_cnt, txd_cnt);
174 }
175
176 static void nfp_net_get_strings(struct net_device *netdev,
177 u32 stringset, u8 *data)
178 {
179 struct nfp_net *nn = netdev_priv(netdev);
180 u8 *p = data;
181 int i;
182
183 switch (stringset) {
184 case ETH_SS_STATS:
185 for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) {
186 memcpy(p, nfp_net_et_stats[i].name, ETH_GSTRING_LEN);
187 p += ETH_GSTRING_LEN;
188 }
189 for (i = 0; i < nn->num_r_vecs; i++) {
190 sprintf(p, "rvec_%u_rx_pkts", i);
191 p += ETH_GSTRING_LEN;
192 sprintf(p, "rvec_%u_tx_pkts", i);
193 p += ETH_GSTRING_LEN;
194 sprintf(p, "rvec_%u_tx_busy", i);
195 p += ETH_GSTRING_LEN;
196 }
197 strncpy(p, "hw_rx_csum_ok", ETH_GSTRING_LEN);
198 p += ETH_GSTRING_LEN;
199 strncpy(p, "hw_rx_csum_inner_ok", ETH_GSTRING_LEN);
200 p += ETH_GSTRING_LEN;
201 strncpy(p, "hw_rx_csum_err", ETH_GSTRING_LEN);
202 p += ETH_GSTRING_LEN;
203 strncpy(p, "hw_tx_csum", ETH_GSTRING_LEN);
204 p += ETH_GSTRING_LEN;
205 strncpy(p, "hw_tx_inner_csum", ETH_GSTRING_LEN);
206 p += ETH_GSTRING_LEN;
207 strncpy(p, "tx_gather", ETH_GSTRING_LEN);
208 p += ETH_GSTRING_LEN;
209 strncpy(p, "tx_lso", ETH_GSTRING_LEN);
210 p += ETH_GSTRING_LEN;
211 for (i = 0; i < nn->num_tx_rings; i++) {
212 sprintf(p, "txq_%u_pkts", i);
213 p += ETH_GSTRING_LEN;
214 sprintf(p, "txq_%u_bytes", i);
215 p += ETH_GSTRING_LEN;
216 }
217 for (i = 0; i < nn->num_rx_rings; i++) {
218 sprintf(p, "rxq_%u_pkts", i);
219 p += ETH_GSTRING_LEN;
220 sprintf(p, "rxq_%u_bytes", i);
221 p += ETH_GSTRING_LEN;
222 }
223 break;
224 }
225 }
226
227 static void nfp_net_get_stats(struct net_device *netdev,
228 struct ethtool_stats *stats, u64 *data)
229 {
230 u64 gathered_stats[NN_ET_RVEC_GATHER_STATS] = {};
231 struct nfp_net *nn = netdev_priv(netdev);
232 struct rtnl_link_stats64 *netdev_stats;
233 struct rtnl_link_stats64 temp = {};
234 u64 tmp[NN_ET_RVEC_GATHER_STATS];
235 u8 __iomem *io_p;
236 int i, j, k;
237 u8 *p;
238
239 netdev_stats = dev_get_stats(netdev, &temp);
240
241 for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) {
242 switch (nfp_net_et_stats[i].type) {
243 case NETDEV_ET_STATS:
244 p = (char *)netdev_stats + nfp_net_et_stats[i].off;
245 data[i] = nfp_net_et_stats[i].sz == sizeof(u64) ?
246 *(u64 *)p : *(u32 *)p;
247 break;
248
249 case NFP_NET_DEV_ET_STATS:
250 io_p = nn->ctrl_bar + nfp_net_et_stats[i].off;
251 data[i] = readq(io_p);
252 break;
253 }
254 }
255 for (j = 0; j < nn->num_r_vecs; j++) {
256 unsigned int start;
257
258 do {
259 start = u64_stats_fetch_begin(&nn->r_vecs[j].rx_sync);
260 data[i++] = nn->r_vecs[j].rx_pkts;
261 tmp[0] = nn->r_vecs[j].hw_csum_rx_ok;
262 tmp[1] = nn->r_vecs[j].hw_csum_rx_inner_ok;
263 tmp[2] = nn->r_vecs[j].hw_csum_rx_error;
264 } while (u64_stats_fetch_retry(&nn->r_vecs[j].rx_sync, start));
265
266 do {
267 start = u64_stats_fetch_begin(&nn->r_vecs[j].tx_sync);
268 data[i++] = nn->r_vecs[j].tx_pkts;
269 data[i++] = nn->r_vecs[j].tx_busy;
270 tmp[3] = nn->r_vecs[j].hw_csum_tx;
271 tmp[4] = nn->r_vecs[j].hw_csum_tx_inner;
272 tmp[5] = nn->r_vecs[j].tx_gather;
273 tmp[6] = nn->r_vecs[j].tx_lso;
274 } while (u64_stats_fetch_retry(&nn->r_vecs[j].tx_sync, start));
275
276 for (k = 0; k < NN_ET_RVEC_GATHER_STATS; k++)
277 gathered_stats[k] += tmp[k];
278 }
279 for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++)
280 data[i++] = gathered_stats[j];
281 for (j = 0; j < nn->num_tx_rings; j++) {
282 io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j);
283 data[i++] = readq(io_p);
284 io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j) + 8;
285 data[i++] = readq(io_p);
286 }
287 for (j = 0; j < nn->num_rx_rings; j++) {
288 io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j);
289 data[i++] = readq(io_p);
290 io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j) + 8;
291 data[i++] = readq(io_p);
292 }
293 }
294
295 static int nfp_net_get_sset_count(struct net_device *netdev, int sset)
296 {
297 struct nfp_net *nn = netdev_priv(netdev);
298
299 switch (sset) {
300 case ETH_SS_STATS:
301 return NN_ET_STATS_LEN;
302 default:
303 return -EOPNOTSUPP;
304 }
305 }
306
307 /* RX network flow classification (RSS, filters, etc)
308 */
309 static u32 ethtool_flow_to_nfp_flag(u32 flow_type)
310 {
311 static const u32 xlate_ethtool_to_nfp[IPV6_FLOW + 1] = {
312 [TCP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_TCP,
313 [TCP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_TCP,
314 [UDP_V4_FLOW] = NFP_NET_CFG_RSS_IPV4_UDP,
315 [UDP_V6_FLOW] = NFP_NET_CFG_RSS_IPV6_UDP,
316 [IPV4_FLOW] = NFP_NET_CFG_RSS_IPV4,
317 [IPV6_FLOW] = NFP_NET_CFG_RSS_IPV6,
318 };
319
320 if (flow_type >= ARRAY_SIZE(xlate_ethtool_to_nfp))
321 return 0;
322
323 return xlate_ethtool_to_nfp[flow_type];
324 }
325
326 static int nfp_net_get_rss_hash_opts(struct nfp_net *nn,
327 struct ethtool_rxnfc *cmd)
328 {
329 u32 nfp_rss_flag;
330
331 cmd->data = 0;
332
333 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS))
334 return -EOPNOTSUPP;
335
336 nfp_rss_flag = ethtool_flow_to_nfp_flag(cmd->flow_type);
337 if (!nfp_rss_flag)
338 return -EINVAL;
339
340 cmd->data |= RXH_IP_SRC | RXH_IP_DST;
341 if (nn->rss_cfg & nfp_rss_flag)
342 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
343
344 return 0;
345 }
346
347 static int nfp_net_get_rxnfc(struct net_device *netdev,
348 struct ethtool_rxnfc *cmd, u32 *rule_locs)
349 {
350 struct nfp_net *nn = netdev_priv(netdev);
351
352 switch (cmd->cmd) {
353 case ETHTOOL_GRXRINGS:
354 cmd->data = nn->num_rx_rings;
355 return 0;
356 case ETHTOOL_GRXFH:
357 return nfp_net_get_rss_hash_opts(nn, cmd);
358 default:
359 return -EOPNOTSUPP;
360 }
361 }
362
363 static int nfp_net_set_rss_hash_opt(struct nfp_net *nn,
364 struct ethtool_rxnfc *nfc)
365 {
366 u32 new_rss_cfg = nn->rss_cfg;
367 u32 nfp_rss_flag;
368 int err;
369
370 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS))
371 return -EOPNOTSUPP;
372
373 /* RSS only supports IP SA/DA and L4 src/dst ports */
374 if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST |
375 RXH_L4_B_0_1 | RXH_L4_B_2_3))
376 return -EINVAL;
377
378 /* We need at least the IP SA/DA fields for hashing */
379 if (!(nfc->data & RXH_IP_SRC) ||
380 !(nfc->data & RXH_IP_DST))
381 return -EINVAL;
382
383 nfp_rss_flag = ethtool_flow_to_nfp_flag(nfc->flow_type);
384 if (!nfp_rss_flag)
385 return -EINVAL;
386
387 switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
388 case 0:
389 new_rss_cfg &= ~nfp_rss_flag;
390 break;
391 case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
392 new_rss_cfg |= nfp_rss_flag;
393 break;
394 default:
395 return -EINVAL;
396 }
397
398 new_rss_cfg |= NFP_NET_CFG_RSS_TOEPLITZ;
399 new_rss_cfg |= NFP_NET_CFG_RSS_MASK;
400
401 if (new_rss_cfg == nn->rss_cfg)
402 return 0;
403
404 writel(new_rss_cfg, nn->ctrl_bar + NFP_NET_CFG_RSS_CTRL);
405 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS);
406 if (err)
407 return err;
408
409 nn->rss_cfg = new_rss_cfg;
410
411 nn_dbg(nn, "Changed RSS config to 0x%x\n", nn->rss_cfg);
412 return 0;
413 }
414
415 static int nfp_net_set_rxnfc(struct net_device *netdev,
416 struct ethtool_rxnfc *cmd)
417 {
418 struct nfp_net *nn = netdev_priv(netdev);
419
420 switch (cmd->cmd) {
421 case ETHTOOL_SRXFH:
422 return nfp_net_set_rss_hash_opt(nn, cmd);
423 default:
424 return -EOPNOTSUPP;
425 }
426 }
427
428 static u32 nfp_net_get_rxfh_indir_size(struct net_device *netdev)
429 {
430 struct nfp_net *nn = netdev_priv(netdev);
431
432 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS))
433 return 0;
434
435 return ARRAY_SIZE(nn->rss_itbl);
436 }
437
438 static u32 nfp_net_get_rxfh_key_size(struct net_device *netdev)
439 {
440 return NFP_NET_CFG_RSS_KEY_SZ;
441 }
442
443 static int nfp_net_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
444 u8 *hfunc)
445 {
446 struct nfp_net *nn = netdev_priv(netdev);
447 int i;
448
449 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS))
450 return -EOPNOTSUPP;
451
452 if (indir)
453 for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++)
454 indir[i] = nn->rss_itbl[i];
455 if (key)
456 memcpy(key, nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ);
457 if (hfunc)
458 *hfunc = ETH_RSS_HASH_TOP;
459
460 return 0;
461 }
462
463 static int nfp_net_set_rxfh(struct net_device *netdev,
464 const u32 *indir, const u8 *key,
465 const u8 hfunc)
466 {
467 struct nfp_net *nn = netdev_priv(netdev);
468 int i;
469
470 if (!(nn->cap & NFP_NET_CFG_CTRL_RSS) ||
471 !(hfunc == ETH_RSS_HASH_NO_CHANGE || hfunc == ETH_RSS_HASH_TOP))
472 return -EOPNOTSUPP;
473
474 if (!key && !indir)
475 return 0;
476
477 if (key) {
478 memcpy(nn->rss_key, key, NFP_NET_CFG_RSS_KEY_SZ);
479 nfp_net_rss_write_key(nn);
480 }
481 if (indir) {
482 for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++)
483 nn->rss_itbl[i] = indir[i];
484
485 nfp_net_rss_write_itbl(nn);
486 }
487
488 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS);
489 }
490
491 /* Dump BAR registers
492 */
493 static int nfp_net_get_regs_len(struct net_device *netdev)
494 {
495 return NFP_NET_CFG_BAR_SZ;
496 }
497
498 static void nfp_net_get_regs(struct net_device *netdev,
499 struct ethtool_regs *regs, void *p)
500 {
501 struct nfp_net *nn = netdev_priv(netdev);
502 u32 *regs_buf = p;
503 int i;
504
505 regs->version = nn_readl(nn, NFP_NET_CFG_VERSION);
506
507 for (i = 0; i < NFP_NET_CFG_BAR_SZ / sizeof(u32); i++)
508 regs_buf[i] = readl(nn->ctrl_bar + (i * sizeof(u32)));
509 }
510
511 static int nfp_net_get_coalesce(struct net_device *netdev,
512 struct ethtool_coalesce *ec)
513 {
514 struct nfp_net *nn = netdev_priv(netdev);
515
516 if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD))
517 return -EINVAL;
518
519 ec->rx_coalesce_usecs = nn->rx_coalesce_usecs;
520 ec->rx_max_coalesced_frames = nn->rx_coalesce_max_frames;
521 ec->tx_coalesce_usecs = nn->tx_coalesce_usecs;
522 ec->tx_max_coalesced_frames = nn->tx_coalesce_max_frames;
523
524 return 0;
525 }
526
527 static int nfp_net_set_coalesce(struct net_device *netdev,
528 struct ethtool_coalesce *ec)
529 {
530 struct nfp_net *nn = netdev_priv(netdev);
531 unsigned int factor;
532
533 if (ec->rx_coalesce_usecs_irq ||
534 ec->rx_max_coalesced_frames_irq ||
535 ec->tx_coalesce_usecs_irq ||
536 ec->tx_max_coalesced_frames_irq ||
537 ec->stats_block_coalesce_usecs ||
538 ec->use_adaptive_rx_coalesce ||
539 ec->use_adaptive_tx_coalesce ||
540 ec->pkt_rate_low ||
541 ec->rx_coalesce_usecs_low ||
542 ec->rx_max_coalesced_frames_low ||
543 ec->tx_coalesce_usecs_low ||
544 ec->tx_max_coalesced_frames_low ||
545 ec->pkt_rate_high ||
546 ec->rx_coalesce_usecs_high ||
547 ec->rx_max_coalesced_frames_high ||
548 ec->tx_coalesce_usecs_high ||
549 ec->tx_max_coalesced_frames_high ||
550 ec->rate_sample_interval)
551 return -ENOTSUPP;
552
553 /* Compute factor used to convert coalesce '_usecs' parameters to
554 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
555 * count.
556 */
557 factor = nn->me_freq_mhz / 16;
558
559 /* Each pair of (usecs, max_frames) fields specifies that interrupts
560 * should be coalesced until
561 * (usecs > 0 && time_since_first_completion >= usecs) ||
562 * (max_frames > 0 && completed_frames >= max_frames)
563 *
564 * It is illegal to set both usecs and max_frames to zero as this would
565 * cause interrupts to never be generated. To disable coalescing, set
566 * usecs = 0 and max_frames = 1.
567 *
568 * Some implementations ignore the value of max_frames and use the
569 * condition time_since_first_completion >= usecs
570 */
571
572 if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD))
573 return -EINVAL;
574
575 /* ensure valid configuration */
576 if (!ec->rx_coalesce_usecs && !ec->rx_max_coalesced_frames)
577 return -EINVAL;
578
579 if (!ec->tx_coalesce_usecs && !ec->tx_max_coalesced_frames)
580 return -EINVAL;
581
582 if (ec->rx_coalesce_usecs * factor >= ((1 << 16) - 1))
583 return -EINVAL;
584
585 if (ec->tx_coalesce_usecs * factor >= ((1 << 16) - 1))
586 return -EINVAL;
587
588 if (ec->rx_max_coalesced_frames >= ((1 << 16) - 1))
589 return -EINVAL;
590
591 if (ec->tx_max_coalesced_frames >= ((1 << 16) - 1))
592 return -EINVAL;
593
594 /* configuration is valid */
595 nn->rx_coalesce_usecs = ec->rx_coalesce_usecs;
596 nn->rx_coalesce_max_frames = ec->rx_max_coalesced_frames;
597 nn->tx_coalesce_usecs = ec->tx_coalesce_usecs;
598 nn->tx_coalesce_max_frames = ec->tx_max_coalesced_frames;
599
600 /* write configuration to device */
601 nfp_net_coalesce_write_cfg(nn);
602 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
603 }
604
605 static const struct ethtool_ops nfp_net_ethtool_ops = {
606 .get_drvinfo = nfp_net_get_drvinfo,
607 .get_link = ethtool_op_get_link,
608 .get_ringparam = nfp_net_get_ringparam,
609 .set_ringparam = nfp_net_set_ringparam,
610 .get_strings = nfp_net_get_strings,
611 .get_ethtool_stats = nfp_net_get_stats,
612 .get_sset_count = nfp_net_get_sset_count,
613 .get_rxnfc = nfp_net_get_rxnfc,
614 .set_rxnfc = nfp_net_set_rxnfc,
615 .get_rxfh_indir_size = nfp_net_get_rxfh_indir_size,
616 .get_rxfh_key_size = nfp_net_get_rxfh_key_size,
617 .get_rxfh = nfp_net_get_rxfh,
618 .set_rxfh = nfp_net_set_rxfh,
619 .get_regs_len = nfp_net_get_regs_len,
620 .get_regs = nfp_net_get_regs,
621 .get_coalesce = nfp_net_get_coalesce,
622 .set_coalesce = nfp_net_set_coalesce,
623 };
624
625 void nfp_net_set_ethtool_ops(struct net_device *netdev)
626 {
627 netdev->ethtool_ops = &nfp_net_ethtool_ops;
628 }
Linux kernel - Deliverables
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