1 // SPDX-License-Identifier: GPL-2.0-only
2 /****************************************************************************
3 * Driver for Solarflare network controllers and boards
4 * Copyright 2018 Solarflare Communications Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
9 */
10
11 #include "mcdi_port_common.h"
12 #include "efx_common.h"
13 #include "nic.h"
14
efx_mcdi_get_phy_cfg(struct efx_nic * efx,struct efx_mcdi_phy_data * cfg)15 int efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_data *cfg)
16 {
17 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_CFG_OUT_LEN);
18 size_t outlen;
19 int rc;
20
21 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_IN_LEN != 0);
22 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_OUT_NAME_LEN != sizeof(cfg->name));
23
24 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_CFG, NULL, 0,
25 outbuf, sizeof(outbuf), &outlen);
26 if (rc)
27 goto fail;
28
29 if (outlen < MC_CMD_GET_PHY_CFG_OUT_LEN) {
30 rc = -EIO;
31 goto fail;
32 }
33
34 cfg->flags = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_FLAGS);
35 cfg->type = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_TYPE);
36 cfg->supported_cap =
37 MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_SUPPORTED_CAP);
38 cfg->channel = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_CHANNEL);
39 cfg->port = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_PRT);
40 cfg->stats_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_STATS_MASK);
41 memcpy(cfg->name, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_NAME),
42 sizeof(cfg->name));
43 cfg->media = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MEDIA_TYPE);
44 cfg->mmd_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MMD_MASK);
45 memcpy(cfg->revision, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_REVISION),
46 sizeof(cfg->revision));
47
48 return 0;
49
50 fail:
51 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
52 return rc;
53 }
54
efx_link_set_advertising(struct efx_nic * efx,const unsigned long * advertising)55 void efx_link_set_advertising(struct efx_nic *efx,
56 const unsigned long *advertising)
57 {
58 memcpy(efx->link_advertising, advertising,
59 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));
60
61 efx->link_advertising[0] |= ADVERTISED_Autoneg;
62 if (advertising[0] & ADVERTISED_Pause)
63 efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
64 else
65 efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
66 if (advertising[0] & ADVERTISED_Asym_Pause)
67 efx->wanted_fc ^= EFX_FC_TX;
68 }
69
efx_mcdi_set_link(struct efx_nic * efx,u32 capabilities,u32 flags,u32 loopback_mode,u32 loopback_speed)70 int efx_mcdi_set_link(struct efx_nic *efx, u32 capabilities,
71 u32 flags, u32 loopback_mode, u32 loopback_speed)
72 {
73 MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_LINK_IN_LEN);
74
75 BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0);
76
77 MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities);
78 MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags);
79 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode);
80 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed);
81
82 return efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf),
83 NULL, 0, NULL);
84 }
85
efx_mcdi_loopback_modes(struct efx_nic * efx,u64 * loopback_modes)86 int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes)
87 {
88 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LOOPBACK_MODES_OUT_LEN);
89 size_t outlen;
90 int rc;
91
92 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0,
93 outbuf, sizeof(outbuf), &outlen);
94 if (rc)
95 goto fail;
96
97 if (outlen < (MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_OFST +
98 MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN)) {
99 rc = -EIO;
100 goto fail;
101 }
102
103 *loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_OUT_SUGGESTED);
104
105 return 0;
106
107 fail:
108 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
109 return rc;
110 }
111
mcdi_to_ethtool_linkset(u32 media,u32 cap,unsigned long * linkset)112 void mcdi_to_ethtool_linkset(u32 media, u32 cap, unsigned long *linkset)
113 {
114 #define SET_BIT(name) __set_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
115 linkset)
116
117 bitmap_zero(linkset, __ETHTOOL_LINK_MODE_MASK_NBITS);
118 switch (media) {
119 case MC_CMD_MEDIA_KX4:
120 SET_BIT(Backplane);
121 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
122 SET_BIT(1000baseKX_Full);
123 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
124 SET_BIT(10000baseKX4_Full);
125 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
126 SET_BIT(40000baseKR4_Full);
127 break;
128
129 case MC_CMD_MEDIA_XFP:
130 case MC_CMD_MEDIA_SFP_PLUS:
131 case MC_CMD_MEDIA_QSFP_PLUS:
132 SET_BIT(FIBRE);
133 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN)) {
134 SET_BIT(1000baseT_Full);
135 SET_BIT(1000baseX_Full);
136 }
137 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN)) {
138 SET_BIT(10000baseCR_Full);
139 SET_BIT(10000baseLR_Full);
140 SET_BIT(10000baseSR_Full);
141 }
142 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN)) {
143 SET_BIT(40000baseCR4_Full);
144 SET_BIT(40000baseSR4_Full);
145 }
146 if (cap & (1 << MC_CMD_PHY_CAP_100000FDX_LBN)) {
147 SET_BIT(100000baseCR4_Full);
148 SET_BIT(100000baseSR4_Full);
149 }
150 if (cap & (1 << MC_CMD_PHY_CAP_25000FDX_LBN)) {
151 SET_BIT(25000baseCR_Full);
152 SET_BIT(25000baseSR_Full);
153 }
154 if (cap & (1 << MC_CMD_PHY_CAP_50000FDX_LBN))
155 SET_BIT(50000baseCR2_Full);
156 break;
157
158 case MC_CMD_MEDIA_BASE_T:
159 SET_BIT(TP);
160 if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
161 SET_BIT(10baseT_Half);
162 if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
163 SET_BIT(10baseT_Full);
164 if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
165 SET_BIT(100baseT_Half);
166 if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
167 SET_BIT(100baseT_Full);
168 if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
169 SET_BIT(1000baseT_Half);
170 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
171 SET_BIT(1000baseT_Full);
172 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
173 SET_BIT(10000baseT_Full);
174 break;
175 }
176
177 if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
178 SET_BIT(Pause);
179 if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
180 SET_BIT(Asym_Pause);
181 if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
182 SET_BIT(Autoneg);
183
184 #undef SET_BIT
185 }
186
ethtool_linkset_to_mcdi_cap(const unsigned long * linkset)187 u32 ethtool_linkset_to_mcdi_cap(const unsigned long *linkset)
188 {
189 u32 result = 0;
190
191 #define TEST_BIT(name) test_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
192 linkset)
193
194 if (TEST_BIT(10baseT_Half))
195 result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
196 if (TEST_BIT(10baseT_Full))
197 result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
198 if (TEST_BIT(100baseT_Half))
199 result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
200 if (TEST_BIT(100baseT_Full))
201 result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
202 if (TEST_BIT(1000baseT_Half))
203 result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
204 if (TEST_BIT(1000baseT_Full) || TEST_BIT(1000baseKX_Full) ||
205 TEST_BIT(1000baseX_Full))
206 result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
207 if (TEST_BIT(10000baseT_Full) || TEST_BIT(10000baseKX4_Full) ||
208 TEST_BIT(10000baseCR_Full) || TEST_BIT(10000baseLR_Full) ||
209 TEST_BIT(10000baseSR_Full))
210 result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
211 if (TEST_BIT(40000baseCR4_Full) || TEST_BIT(40000baseKR4_Full) ||
212 TEST_BIT(40000baseSR4_Full))
213 result |= (1 << MC_CMD_PHY_CAP_40000FDX_LBN);
214 if (TEST_BIT(100000baseCR4_Full) || TEST_BIT(100000baseSR4_Full))
215 result |= (1 << MC_CMD_PHY_CAP_100000FDX_LBN);
216 if (TEST_BIT(25000baseCR_Full) || TEST_BIT(25000baseSR_Full))
217 result |= (1 << MC_CMD_PHY_CAP_25000FDX_LBN);
218 if (TEST_BIT(50000baseCR2_Full))
219 result |= (1 << MC_CMD_PHY_CAP_50000FDX_LBN);
220 if (TEST_BIT(Pause))
221 result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
222 if (TEST_BIT(Asym_Pause))
223 result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
224 if (TEST_BIT(Autoneg))
225 result |= (1 << MC_CMD_PHY_CAP_AN_LBN);
226
227 #undef TEST_BIT
228
229 return result;
230 }
231
efx_get_mcdi_phy_flags(struct efx_nic * efx)232 u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
233 {
234 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
235 enum efx_phy_mode mode, supported;
236 u32 flags;
237
238 /* TODO: Advertise the capabilities supported by this PHY */
239 supported = 0;
240 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_TXDIS_LBN))
241 supported |= PHY_MODE_TX_DISABLED;
242 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_LOWPOWER_LBN))
243 supported |= PHY_MODE_LOW_POWER;
244 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_POWEROFF_LBN))
245 supported |= PHY_MODE_OFF;
246
247 mode = efx->phy_mode & supported;
248
249 flags = 0;
250 if (mode & PHY_MODE_TX_DISABLED)
251 flags |= (1 << MC_CMD_SET_LINK_IN_TXDIS_LBN);
252 if (mode & PHY_MODE_LOW_POWER)
253 flags |= (1 << MC_CMD_SET_LINK_IN_LOWPOWER_LBN);
254 if (mode & PHY_MODE_OFF)
255 flags |= (1 << MC_CMD_SET_LINK_IN_POWEROFF_LBN);
256
257 return flags;
258 }
259
mcdi_to_ethtool_media(u32 media)260 u8 mcdi_to_ethtool_media(u32 media)
261 {
262 switch (media) {
263 case MC_CMD_MEDIA_XAUI:
264 case MC_CMD_MEDIA_CX4:
265 case MC_CMD_MEDIA_KX4:
266 return PORT_OTHER;
267
268 case MC_CMD_MEDIA_XFP:
269 case MC_CMD_MEDIA_SFP_PLUS:
270 case MC_CMD_MEDIA_QSFP_PLUS:
271 return PORT_FIBRE;
272
273 case MC_CMD_MEDIA_BASE_T:
274 return PORT_TP;
275
276 default:
277 return PORT_OTHER;
278 }
279 }
280
efx_mcdi_phy_decode_link(struct efx_nic * efx,struct efx_link_state * link_state,u32 speed,u32 flags,u32 fcntl)281 void efx_mcdi_phy_decode_link(struct efx_nic *efx,
282 struct efx_link_state *link_state,
283 u32 speed, u32 flags, u32 fcntl)
284 {
285 switch (fcntl) {
286 case MC_CMD_FCNTL_AUTO:
287 WARN_ON(1); /* This is not a link mode */
288 link_state->fc = EFX_FC_AUTO | EFX_FC_TX | EFX_FC_RX;
289 break;
290 case MC_CMD_FCNTL_BIDIR:
291 link_state->fc = EFX_FC_TX | EFX_FC_RX;
292 break;
293 case MC_CMD_FCNTL_RESPOND:
294 link_state->fc = EFX_FC_RX;
295 break;
296 default:
297 WARN_ON(1);
298 fallthrough;
299 case MC_CMD_FCNTL_OFF:
300 link_state->fc = 0;
301 break;
302 }
303
304 link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_OUT_LINK_UP_LBN));
305 link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_OUT_FULL_DUPLEX_LBN));
306 link_state->speed = speed;
307 }
308
309 /* The semantics of the ethtool FEC mode bitmask are not well defined,
310 * particularly the meaning of combinations of bits. Which means we get to
311 * define our own semantics, as follows:
312 * OFF overrides any other bits, and means "disable all FEC" (with the
313 * exception of 25G KR4/CR4, where it is not possible to reject it if AN
314 * partner requests it).
315 * AUTO on its own means use cable requirements and link partner autoneg with
316 * fw-default preferences for the cable type.
317 * AUTO and either RS or BASER means use the specified FEC type if cable and
318 * link partner support it, otherwise autoneg/fw-default.
319 * RS or BASER alone means use the specified FEC type if cable and link partner
320 * support it and either requests it, otherwise no FEC.
321 * Both RS and BASER (whether AUTO or not) means use FEC if cable and link
322 * partner support it, preferring RS to BASER.
323 */
ethtool_fec_caps_to_mcdi(u32 supported_cap,u32 ethtool_cap)324 u32 ethtool_fec_caps_to_mcdi(u32 supported_cap, u32 ethtool_cap)
325 {
326 u32 ret = 0;
327
328 if (ethtool_cap & ETHTOOL_FEC_OFF)
329 return 0;
330
331 if (ethtool_cap & ETHTOOL_FEC_AUTO)
332 ret |= ((1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
333 (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
334 (1 << MC_CMD_PHY_CAP_RS_FEC_LBN)) & supported_cap;
335 if (ethtool_cap & ETHTOOL_FEC_RS &&
336 supported_cap & (1 << MC_CMD_PHY_CAP_RS_FEC_LBN))
337 ret |= (1 << MC_CMD_PHY_CAP_RS_FEC_LBN) |
338 (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN);
339 if (ethtool_cap & ETHTOOL_FEC_BASER) {
340 if (supported_cap & (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN))
341 ret |= (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
342 (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN);
343 if (supported_cap & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN))
344 ret |= (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
345 (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN);
346 }
347 return ret;
348 }
349
350 /* Invert ethtool_fec_caps_to_mcdi. There are two combinations that function
351 * can never produce, (baser xor rs) and neither req; the implementation below
352 * maps both of those to AUTO. This should never matter, and it's not clear
353 * what a better mapping would be anyway.
354 */
mcdi_fec_caps_to_ethtool(u32 caps,bool is_25g)355 u32 mcdi_fec_caps_to_ethtool(u32 caps, bool is_25g)
356 {
357 bool rs = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_LBN),
358 rs_req = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN),
359 baser = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN)
360 : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN),
361 baser_req = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN)
362 : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN);
363
364 if (!baser && !rs)
365 return ETHTOOL_FEC_OFF;
366 return (rs_req ? ETHTOOL_FEC_RS : 0) |
367 (baser_req ? ETHTOOL_FEC_BASER : 0) |
368 (baser == baser_req && rs == rs_req ? 0 : ETHTOOL_FEC_AUTO);
369 }
370
371 /* Verify that the forced flow control settings (!EFX_FC_AUTO) are
372 * supported by the link partner. Warn the user if this isn't the case
373 */
efx_mcdi_phy_check_fcntl(struct efx_nic * efx,u32 lpa)374 void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
375 {
376 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
377 u32 rmtadv;
378
379 /* The link partner capabilities are only relevant if the
380 * link supports flow control autonegotiation
381 */
382 if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
383 return;
384
385 /* If flow control autoneg is supported and enabled, then fine */
386 if (efx->wanted_fc & EFX_FC_AUTO)
387 return;
388
389 rmtadv = 0;
390 if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
391 rmtadv |= ADVERTISED_Pause;
392 if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
393 rmtadv |= ADVERTISED_Asym_Pause;
394
395 if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause)
396 netif_err(efx, link, efx->net_dev,
397 "warning: link partner doesn't support pause frames");
398 }
399
efx_mcdi_phy_poll(struct efx_nic * efx)400 bool efx_mcdi_phy_poll(struct efx_nic *efx)
401 {
402 struct efx_link_state old_state = efx->link_state;
403 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
404 int rc;
405
406 WARN_ON(!mutex_is_locked(&efx->mac_lock));
407
408 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
409
410 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
411 outbuf, sizeof(outbuf), NULL);
412 if (rc)
413 efx->link_state.up = false;
414 else
415 efx_mcdi_phy_decode_link(
416 efx, &efx->link_state,
417 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
418 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
419 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
420
421 return !efx_link_state_equal(&efx->link_state, &old_state);
422 }
423
efx_mcdi_phy_probe(struct efx_nic * efx)424 int efx_mcdi_phy_probe(struct efx_nic *efx)
425 {
426 struct efx_mcdi_phy_data *phy_data;
427 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
428 u32 caps;
429 int rc;
430
431 /* Initialise and populate phy_data */
432 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
433 if (phy_data == NULL)
434 return -ENOMEM;
435
436 rc = efx_mcdi_get_phy_cfg(efx, phy_data);
437 if (rc != 0)
438 goto fail;
439
440 /* Read initial link advertisement */
441 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
442 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
443 outbuf, sizeof(outbuf), NULL);
444 if (rc)
445 goto fail;
446
447 /* Fill out nic state */
448 efx->phy_data = phy_data;
449 efx->phy_type = phy_data->type;
450
451 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
452 if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
453 mcdi_to_ethtool_linkset(phy_data->media, caps,
454 efx->link_advertising);
455 else
456 phy_data->forced_cap = caps;
457
458 /* Assert that we can map efx -> mcdi loopback modes */
459 BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
460 BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
461 BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
462 BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
463 BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
464 BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
465 BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
466 BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
467 BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
468 BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
469 BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
470 BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
471 BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
472 BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
473 BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
474 BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
475 BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
476 BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
477 BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
478 BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
479 BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
480 BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
481 BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
482 BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
483 BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
484 BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
485 BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);
486
487 rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
488 if (rc != 0)
489 goto fail;
490 /* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
491 * but by convention we don't
492 */
493 efx->loopback_modes &= ~(1 << LOOPBACK_NONE);
494
495 /* Set the initial link mode */
496 efx_mcdi_phy_decode_link(efx, &efx->link_state,
497 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
498 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
499 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
500
501 /* Record the initial FEC configuration (or nearest approximation
502 * representable in the ethtool configuration space)
503 */
504 efx->fec_config = mcdi_fec_caps_to_ethtool(caps,
505 efx->link_state.speed == 25000 ||
506 efx->link_state.speed == 50000);
507
508 /* Default to Autonegotiated flow control if the PHY supports it */
509 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
510 if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
511 efx->wanted_fc |= EFX_FC_AUTO;
512 efx_link_set_wanted_fc(efx, efx->wanted_fc);
513
514 return 0;
515
516 fail:
517 kfree(phy_data);
518 return rc;
519 }
520
efx_mcdi_phy_remove(struct efx_nic * efx)521 void efx_mcdi_phy_remove(struct efx_nic *efx)
522 {
523 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
524
525 efx->phy_data = NULL;
526 kfree(phy_data);
527 }
528
efx_mcdi_phy_get_link_ksettings(struct efx_nic * efx,struct ethtool_link_ksettings * cmd)529 void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx, struct ethtool_link_ksettings *cmd)
530 {
531 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
532 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
533 int rc;
534
535 cmd->base.speed = efx->link_state.speed;
536 cmd->base.duplex = efx->link_state.fd;
537 cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media);
538 cmd->base.phy_address = phy_cfg->port;
539 cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg);
540
541 mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap,
542 cmd->link_modes.supported);
543 memcpy(cmd->link_modes.advertising, efx->link_advertising,
544 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));
545
546 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
547 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
548 outbuf, sizeof(outbuf), NULL);
549 if (rc)
550 return;
551 mcdi_to_ethtool_linkset(phy_cfg->media,
552 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP),
553 cmd->link_modes.lp_advertising);
554 }
555
efx_mcdi_phy_set_link_ksettings(struct efx_nic * efx,const struct ethtool_link_ksettings * cmd)556 int efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx, const struct ethtool_link_ksettings *cmd)
557 {
558 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
559 u32 caps;
560 int rc;
561
562 if (cmd->base.autoneg) {
563 caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) |
564 1 << MC_CMD_PHY_CAP_AN_LBN);
565 } else if (cmd->base.duplex) {
566 switch (cmd->base.speed) {
567 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break;
568 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break;
569 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break;
570 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break;
571 case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break;
572 case 100000: caps = 1 << MC_CMD_PHY_CAP_100000FDX_LBN; break;
573 case 25000: caps = 1 << MC_CMD_PHY_CAP_25000FDX_LBN; break;
574 case 50000: caps = 1 << MC_CMD_PHY_CAP_50000FDX_LBN; break;
575 default: return -EINVAL;
576 }
577 } else {
578 switch (cmd->base.speed) {
579 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break;
580 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break;
581 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break;
582 default: return -EINVAL;
583 }
584 }
585
586 caps |= ethtool_fec_caps_to_mcdi(phy_cfg->supported_cap, efx->fec_config);
587
588 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
589 efx->loopback_mode, 0);
590 if (rc)
591 return rc;
592
593 if (cmd->base.autoneg) {
594 efx_link_set_advertising(efx, cmd->link_modes.advertising);
595 phy_cfg->forced_cap = 0;
596 } else {
597 efx_link_clear_advertising(efx);
598 phy_cfg->forced_cap = caps;
599 }
600 return 0;
601 }
602
efx_mcdi_phy_get_fecparam(struct efx_nic * efx,struct ethtool_fecparam * fec)603 int efx_mcdi_phy_get_fecparam(struct efx_nic *efx, struct ethtool_fecparam *fec)
604 {
605 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_V2_LEN);
606 u32 caps, active, speed; /* MCDI format */
607 bool is_25g = false;
608 size_t outlen;
609 int rc;
610
611 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
612 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
613 outbuf, sizeof(outbuf), &outlen);
614 if (rc)
615 return rc;
616 if (outlen < MC_CMD_GET_LINK_OUT_V2_LEN)
617 return -EOPNOTSUPP;
618
619 /* behaviour for 25G/50G links depends on 25G BASER bit */
620 speed = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_LINK_SPEED);
621 is_25g = speed == 25000 || speed == 50000;
622
623 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_CAP);
624 fec->fec = mcdi_fec_caps_to_ethtool(caps, is_25g);
625 /* BASER is never supported on 100G */
626 if (speed == 100000)
627 fec->fec &= ~ETHTOOL_FEC_BASER;
628
629 active = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_FEC_TYPE);
630 switch (active) {
631 case MC_CMD_FEC_NONE:
632 fec->active_fec = ETHTOOL_FEC_OFF;
633 break;
634 case MC_CMD_FEC_BASER:
635 fec->active_fec = ETHTOOL_FEC_BASER;
636 break;
637 case MC_CMD_FEC_RS:
638 fec->active_fec = ETHTOOL_FEC_RS;
639 break;
640 default:
641 netif_warn(efx, hw, efx->net_dev,
642 "Firmware reports unrecognised FEC_TYPE %u\n",
643 active);
644 /* We don't know what firmware has picked. AUTO is as good a
645 * "can't happen" value as any other.
646 */
647 fec->active_fec = ETHTOOL_FEC_AUTO;
648 break;
649 }
650
651 return 0;
652 }
653
654 /* Basic validation to ensure that the caps we are going to attempt to set are
655 * in fact supported by the adapter. Note that 'no FEC' is always supported.
656 */
ethtool_fec_supported(u32 supported_cap,u32 ethtool_cap)657 static int ethtool_fec_supported(u32 supported_cap, u32 ethtool_cap)
658 {
659 if (ethtool_cap & ETHTOOL_FEC_OFF)
660 return 0;
661
662 if (ethtool_cap &&
663 !ethtool_fec_caps_to_mcdi(supported_cap, ethtool_cap))
664 return -EINVAL;
665 return 0;
666 }
667
efx_mcdi_phy_set_fecparam(struct efx_nic * efx,const struct ethtool_fecparam * fec)668 int efx_mcdi_phy_set_fecparam(struct efx_nic *efx, const struct ethtool_fecparam *fec)
669 {
670 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
671 u32 caps;
672 int rc;
673
674 rc = ethtool_fec_supported(phy_cfg->supported_cap, fec->fec);
675 if (rc)
676 return rc;
677
678 /* Work out what efx_mcdi_phy_set_link_ksettings() would produce from
679 * saved advertising bits
680 */
681 if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, efx->link_advertising))
682 caps = (ethtool_linkset_to_mcdi_cap(efx->link_advertising) |
683 1 << MC_CMD_PHY_CAP_AN_LBN);
684 else
685 caps = phy_cfg->forced_cap;
686
687 caps |= ethtool_fec_caps_to_mcdi(phy_cfg->supported_cap, fec->fec);
688 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
689 efx->loopback_mode, 0);
690 if (rc)
691 return rc;
692
693 /* Record the new FEC setting for subsequent set_link calls */
694 efx->fec_config = fec->fec;
695 return 0;
696 }
697
efx_mcdi_phy_test_alive(struct efx_nic * efx)698 int efx_mcdi_phy_test_alive(struct efx_nic *efx)
699 {
700 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_STATE_OUT_LEN);
701 size_t outlen;
702 int rc;
703
704 BUILD_BUG_ON(MC_CMD_GET_PHY_STATE_IN_LEN != 0);
705
706 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_STATE, NULL, 0,
707 outbuf, sizeof(outbuf), &outlen);
708 if (rc)
709 return rc;
710
711 if (outlen < MC_CMD_GET_PHY_STATE_OUT_LEN)
712 return -EIO;
713 if (MCDI_DWORD(outbuf, GET_PHY_STATE_OUT_STATE) != MC_CMD_PHY_STATE_OK)
714 return -EINVAL;
715
716 return 0;
717 }
718
efx_mcdi_port_reconfigure(struct efx_nic * efx)719 int efx_mcdi_port_reconfigure(struct efx_nic *efx)
720 {
721 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
722 u32 caps = (efx->link_advertising[0] ?
723 ethtool_linkset_to_mcdi_cap(efx->link_advertising) :
724 phy_cfg->forced_cap);
725
726 caps |= ethtool_fec_caps_to_mcdi(phy_cfg->supported_cap, efx->fec_config);
727
728 return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
729 efx->loopback_mode, 0);
730 }
731
732 static const char *const mcdi_sft9001_cable_diag_names[] = {
733 "cable.pairA.length",
734 "cable.pairB.length",
735 "cable.pairC.length",
736 "cable.pairD.length",
737 "cable.pairA.status",
738 "cable.pairB.status",
739 "cable.pairC.status",
740 "cable.pairD.status",
741 };
742
efx_mcdi_bist(struct efx_nic * efx,unsigned int bist_mode,int * results)743 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode,
744 int *results)
745 {
746 unsigned int retry, i, count = 0;
747 size_t outlen;
748 u32 status;
749 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN);
750 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN);
751 u8 *ptr;
752 int rc;
753
754 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0);
755 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode);
756 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST,
757 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL);
758 if (rc)
759 goto out;
760
761 /* Wait up to 10s for BIST to finish */
762 for (retry = 0; retry < 100; ++retry) {
763 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0);
764 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0,
765 outbuf, sizeof(outbuf), &outlen);
766 if (rc)
767 goto out;
768
769 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT);
770 if (status != MC_CMD_POLL_BIST_RUNNING)
771 goto finished;
772
773 msleep(100);
774 }
775
776 rc = -ETIMEDOUT;
777 goto out;
778
779 finished:
780 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1;
781
782 /* SFT9001 specific cable diagnostics output */
783 if (efx->phy_type == PHY_TYPE_SFT9001B &&
784 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT ||
785 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) {
786 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A);
787 if (status == MC_CMD_POLL_BIST_PASSED &&
788 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) {
789 for (i = 0; i < 8; i++) {
790 results[count + i] =
791 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i],
792 EFX_DWORD_0);
793 }
794 }
795 count += 8;
796 }
797 rc = count;
798
799 out:
800 return rc;
801 }
802
efx_mcdi_phy_run_tests(struct efx_nic * efx,int * results,unsigned int flags)803 int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results, unsigned int flags)
804 {
805 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
806 u32 mode;
807 int rc;
808
809 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
810 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results);
811 if (rc < 0)
812 return rc;
813
814 results += rc;
815 }
816
817 /* If we support both LONG and SHORT, then run each in response to
818 * break or not. Otherwise, run the one we support
819 */
820 mode = 0;
821 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) {
822 if ((flags & ETH_TEST_FL_OFFLINE) &&
823 (phy_cfg->flags &
824 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)))
825 mode = MC_CMD_PHY_BIST_CABLE_LONG;
826 else
827 mode = MC_CMD_PHY_BIST_CABLE_SHORT;
828 } else if (phy_cfg->flags &
829 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))
830 mode = MC_CMD_PHY_BIST_CABLE_LONG;
831
832 if (mode != 0) {
833 rc = efx_mcdi_bist(efx, mode, results);
834 if (rc < 0)
835 return rc;
836 results += rc;
837 }
838
839 return 0;
840 }
841
efx_mcdi_phy_test_name(struct efx_nic * efx,unsigned int index)842 const char *efx_mcdi_phy_test_name(struct efx_nic *efx, unsigned int index)
843 {
844 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
845
846 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
847 if (index == 0)
848 return "bist";
849 --index;
850 }
851
852 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) |
853 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) {
854 if (index == 0)
855 return "cable";
856 --index;
857
858 if (efx->phy_type == PHY_TYPE_SFT9001B) {
859 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names))
860 return mcdi_sft9001_cable_diag_names[index];
861 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names);
862 }
863 }
864
865 return NULL;
866 }
867
868 #define SFP_PAGE_SIZE 128
869 #define SFF_DIAG_TYPE_OFFSET 92
870 #define SFF_DIAG_ADDR_CHANGE BIT(2)
871 #define SFF_8079_NUM_PAGES 2
872 #define SFF_8472_NUM_PAGES 4
873 #define SFF_8436_NUM_PAGES 5
874 #define SFF_DMT_LEVEL_OFFSET 94
875
876 /** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom
877 * @efx: NIC context
878 * @page: EEPROM page number
879 * @data: Destination data pointer
880 * @offset: Offset in page to copy from in to data
881 * @space: Space available in data
882 *
883 * Return:
884 * >=0 - amount of data copied
885 * <0 - error
886 */
efx_mcdi_phy_get_module_eeprom_page(struct efx_nic * efx,unsigned int page,u8 * data,ssize_t offset,ssize_t space)887 static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx,
888 unsigned int page,
889 u8 *data, ssize_t offset,
890 ssize_t space)
891 {
892 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
893 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
894 unsigned int payload_len;
895 unsigned int to_copy;
896 size_t outlen;
897 int rc;
898
899 if (offset > SFP_PAGE_SIZE)
900 return -EINVAL;
901
902 to_copy = min(space, SFP_PAGE_SIZE - offset);
903
904 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
905 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO,
906 inbuf, sizeof(inbuf),
907 outbuf, sizeof(outbuf),
908 &outlen);
909
910 if (rc)
911 return rc;
912
913 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
914 SFP_PAGE_SIZE))
915 return -EIO;
916
917 payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN);
918 if (payload_len != SFP_PAGE_SIZE)
919 return -EIO;
920
921 memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset,
922 to_copy);
923
924 return to_copy;
925 }
926
efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic * efx,unsigned int page,u8 byte)927 static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx,
928 unsigned int page,
929 u8 byte)
930 {
931 u8 data;
932 int rc;
933
934 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1);
935 if (rc == 1)
936 return data;
937
938 return rc;
939 }
940
efx_mcdi_phy_diag_type(struct efx_nic * efx)941 static int efx_mcdi_phy_diag_type(struct efx_nic *efx)
942 {
943 /* Page zero of the EEPROM includes the diagnostic type at byte 92. */
944 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
945 SFF_DIAG_TYPE_OFFSET);
946 }
947
efx_mcdi_phy_sff_8472_level(struct efx_nic * efx)948 static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx)
949 {
950 /* Page zero of the EEPROM includes the DMT level at byte 94. */
951 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
952 SFF_DMT_LEVEL_OFFSET);
953 }
954
efx_mcdi_phy_module_type(struct efx_nic * efx)955 static u32 efx_mcdi_phy_module_type(struct efx_nic *efx)
956 {
957 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
958
959 if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS)
960 return phy_data->media;
961
962 /* A QSFP+ NIC may actually have an SFP+ module attached.
963 * The ID is page 0, byte 0.
964 * QSFP28 is of type SFF_8636, however, this is treated
965 * the same by ethtool, so we can also treat them the same.
966 */
967 switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) {
968 case 0x3: /* SFP */
969 return MC_CMD_MEDIA_SFP_PLUS;
970 case 0xc: /* QSFP */
971 case 0xd: /* QSFP+ */
972 case 0x11: /* QSFP28 */
973 return MC_CMD_MEDIA_QSFP_PLUS;
974 default:
975 return 0;
976 }
977 }
978
efx_mcdi_phy_get_module_eeprom(struct efx_nic * efx,struct ethtool_eeprom * ee,u8 * data)979 int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx, struct ethtool_eeprom *ee, u8 *data)
980 {
981 int rc;
982 ssize_t space_remaining = ee->len;
983 unsigned int page_off;
984 bool ignore_missing;
985 int num_pages;
986 int page;
987
988 switch (efx_mcdi_phy_module_type(efx)) {
989 case MC_CMD_MEDIA_SFP_PLUS:
990 num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ?
991 SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES;
992 page = 0;
993 ignore_missing = false;
994 break;
995 case MC_CMD_MEDIA_QSFP_PLUS:
996 num_pages = SFF_8436_NUM_PAGES;
997 page = -1; /* We obtain the lower page by asking for -1. */
998 ignore_missing = true; /* Ignore missing pages after page 0. */
999 break;
1000 default:
1001 return -EOPNOTSUPP;
1002 }
1003
1004 page_off = ee->offset % SFP_PAGE_SIZE;
1005 page += ee->offset / SFP_PAGE_SIZE;
1006
1007 while (space_remaining && (page < num_pages)) {
1008 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page,
1009 data, page_off,
1010 space_remaining);
1011
1012 if (rc > 0) {
1013 space_remaining -= rc;
1014 data += rc;
1015 page_off = 0;
1016 page++;
1017 } else if (rc == 0) {
1018 space_remaining = 0;
1019 } else if (ignore_missing && (page > 0)) {
1020 int intended_size = SFP_PAGE_SIZE - page_off;
1021
1022 space_remaining -= intended_size;
1023 if (space_remaining < 0) {
1024 space_remaining = 0;
1025 } else {
1026 memset(data, 0, intended_size);
1027 data += intended_size;
1028 page_off = 0;
1029 page++;
1030 rc = 0;
1031 }
1032 } else {
1033 return rc;
1034 }
1035 }
1036
1037 return 0;
1038 }
1039
efx_mcdi_phy_get_module_info(struct efx_nic * efx,struct ethtool_modinfo * modinfo)1040 int efx_mcdi_phy_get_module_info(struct efx_nic *efx, struct ethtool_modinfo *modinfo)
1041 {
1042 int sff_8472_level;
1043 int diag_type;
1044
1045 switch (efx_mcdi_phy_module_type(efx)) {
1046 case MC_CMD_MEDIA_SFP_PLUS:
1047 sff_8472_level = efx_mcdi_phy_sff_8472_level(efx);
1048
1049 /* If we can't read the diagnostics level we have none. */
1050 if (sff_8472_level < 0)
1051 return -EOPNOTSUPP;
1052
1053 /* Check if this module requires the (unsupported) address
1054 * change operation.
1055 */
1056 diag_type = efx_mcdi_phy_diag_type(efx);
1057
1058 if (sff_8472_level == 0 ||
1059 (diag_type & SFF_DIAG_ADDR_CHANGE)) {
1060 modinfo->type = ETH_MODULE_SFF_8079;
1061 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
1062 } else {
1063 modinfo->type = ETH_MODULE_SFF_8472;
1064 modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
1065 }
1066 break;
1067
1068 case MC_CMD_MEDIA_QSFP_PLUS:
1069 modinfo->type = ETH_MODULE_SFF_8436;
1070 modinfo->eeprom_len = ETH_MODULE_SFF_8436_MAX_LEN;
1071 break;
1072
1073 default:
1074 return -EOPNOTSUPP;
1075 }
1076
1077 return 0;
1078 }
1079
efx_calc_mac_mtu(struct efx_nic * efx)1080 static unsigned int efx_calc_mac_mtu(struct efx_nic *efx)
1081 {
1082 return EFX_MAX_FRAME_LEN(efx->net_dev->mtu);
1083 }
1084
efx_mcdi_set_mac(struct efx_nic * efx)1085 int efx_mcdi_set_mac(struct efx_nic *efx)
1086 {
1087 u32 fcntl;
1088 MCDI_DECLARE_BUF(cmdbytes, MC_CMD_SET_MAC_IN_LEN);
1089
1090 BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
1091
1092 /* This has no effect on EF10 */
1093 ether_addr_copy(MCDI_PTR(cmdbytes, SET_MAC_IN_ADDR),
1094 efx->net_dev->dev_addr);
1095
1096 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU, efx_calc_mac_mtu(efx));
1097 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0);
1098 MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_FLAGS,
1099 SET_MAC_IN_FLAG_INCLUDE_FCS,
1100 !!(efx->net_dev->features & NETIF_F_RXFCS));
1101
1102 switch (efx->wanted_fc) {
1103 case EFX_FC_RX | EFX_FC_TX:
1104 fcntl = MC_CMD_FCNTL_BIDIR;
1105 break;
1106 case EFX_FC_RX:
1107 fcntl = MC_CMD_FCNTL_RESPOND;
1108 break;
1109 default:
1110 fcntl = MC_CMD_FCNTL_OFF;
1111 break;
1112 }
1113 if (efx->wanted_fc & EFX_FC_AUTO)
1114 fcntl = MC_CMD_FCNTL_AUTO;
1115 if (efx->fc_disable)
1116 fcntl = MC_CMD_FCNTL_OFF;
1117
1118 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_FCNTL, fcntl);
1119
1120 return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, cmdbytes, sizeof(cmdbytes),
1121 NULL, 0, NULL);
1122 }
1123
efx_mcdi_set_mtu(struct efx_nic * efx)1124 int efx_mcdi_set_mtu(struct efx_nic *efx)
1125 {
1126 MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_MAC_EXT_IN_LEN);
1127
1128 BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
1129
1130 MCDI_SET_DWORD(inbuf, SET_MAC_EXT_IN_MTU, efx_calc_mac_mtu(efx));
1131
1132 MCDI_POPULATE_DWORD_1(inbuf, SET_MAC_EXT_IN_CONTROL,
1133 SET_MAC_EXT_IN_CFG_MTU, 1);
1134
1135 return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, inbuf, sizeof(inbuf),
1136 NULL, 0, NULL);
1137 }
1138
1139 enum efx_stats_action {
1140 EFX_STATS_ENABLE,
1141 EFX_STATS_DISABLE,
1142 EFX_STATS_PULL,
1143 };
1144
efx_mcdi_mac_stats(struct efx_nic * efx,enum efx_stats_action action,int clear)1145 static int efx_mcdi_mac_stats(struct efx_nic *efx,
1146 enum efx_stats_action action, int clear)
1147 {
1148 MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
1149 int rc;
1150 int change = action == EFX_STATS_PULL ? 0 : 1;
1151 int enable = action == EFX_STATS_ENABLE ? 1 : 0;
1152 int period = action == EFX_STATS_ENABLE ? 1000 : 0;
1153 dma_addr_t dma_addr = efx->stats_buffer.dma_addr;
1154 u32 dma_len = action != EFX_STATS_DISABLE ?
1155 efx->num_mac_stats * sizeof(u64) : 0;
1156
1157 BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
1158
1159 MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
1160 MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
1161 MAC_STATS_IN_DMA, !!enable,
1162 MAC_STATS_IN_CLEAR, clear,
1163 MAC_STATS_IN_PERIODIC_CHANGE, change,
1164 MAC_STATS_IN_PERIODIC_ENABLE, enable,
1165 MAC_STATS_IN_PERIODIC_CLEAR, 0,
1166 MAC_STATS_IN_PERIODIC_NOEVENT, 1,
1167 MAC_STATS_IN_PERIOD_MS, period);
1168 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
1169
1170 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
1171 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, efx->vport_id);
1172
1173 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
1174 NULL, 0, NULL);
1175 /* Expect ENOENT if DMA queues have not been set up */
1176 if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues)))
1177 efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf),
1178 NULL, 0, rc);
1179 return rc;
1180 }
1181
efx_mcdi_mac_start_stats(struct efx_nic * efx)1182 void efx_mcdi_mac_start_stats(struct efx_nic *efx)
1183 {
1184 __le64 *dma_stats = efx->stats_buffer.addr;
1185
1186 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
1187
1188 efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0);
1189 }
1190
efx_mcdi_mac_stop_stats(struct efx_nic * efx)1191 void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
1192 {
1193 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0);
1194 }
1195
1196 #define EFX_MAC_STATS_WAIT_US 100
1197 #define EFX_MAC_STATS_WAIT_ATTEMPTS 10
1198
efx_mcdi_mac_pull_stats(struct efx_nic * efx)1199 void efx_mcdi_mac_pull_stats(struct efx_nic *efx)
1200 {
1201 __le64 *dma_stats = efx->stats_buffer.addr;
1202 int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS;
1203
1204 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
1205 efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0);
1206
1207 while (dma_stats[efx->num_mac_stats - 1] ==
1208 EFX_MC_STATS_GENERATION_INVALID &&
1209 attempts-- != 0)
1210 udelay(EFX_MAC_STATS_WAIT_US);
1211 }
1212
efx_mcdi_mac_init_stats(struct efx_nic * efx)1213 int efx_mcdi_mac_init_stats(struct efx_nic *efx)
1214 {
1215 int rc;
1216
1217 if (!efx->num_mac_stats)
1218 return 0;
1219
1220 /* Allocate buffer for stats */
1221 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
1222 efx->num_mac_stats * sizeof(u64), GFP_KERNEL);
1223 if (rc) {
1224 netif_warn(efx, probe, efx->net_dev,
1225 "failed to allocate DMA buffer: %d\n", rc);
1226 return rc;
1227 }
1228
1229 netif_dbg(efx, probe, efx->net_dev,
1230 "stats buffer at %llx (virt %p phys %llx)\n",
1231 (u64) efx->stats_buffer.dma_addr,
1232 efx->stats_buffer.addr,
1233 (u64) virt_to_phys(efx->stats_buffer.addr));
1234
1235 return 0;
1236 }
1237
efx_mcdi_mac_fini_stats(struct efx_nic * efx)1238 void efx_mcdi_mac_fini_stats(struct efx_nic *efx)
1239 {
1240 efx_nic_free_buffer(efx, &efx->stats_buffer);
1241 }
1242
1243 /* Get physical port number (EF10 only; on Siena it is same as PF number) */
efx_mcdi_port_get_number(struct efx_nic * efx)1244 int efx_mcdi_port_get_number(struct efx_nic *efx)
1245 {
1246 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PORT_ASSIGNMENT_OUT_LEN);
1247 int rc;
1248
1249 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PORT_ASSIGNMENT, NULL, 0,
1250 outbuf, sizeof(outbuf), NULL);
1251 if (rc)
1252 return rc;
1253
1254 return MCDI_DWORD(outbuf, GET_PORT_ASSIGNMENT_OUT_PORT);
1255 }
1256
1257 static unsigned int efx_mcdi_event_link_speed[] = {
1258 [MCDI_EVENT_LINKCHANGE_SPEED_100M] = 100,
1259 [MCDI_EVENT_LINKCHANGE_SPEED_1G] = 1000,
1260 [MCDI_EVENT_LINKCHANGE_SPEED_10G] = 10000,
1261 [MCDI_EVENT_LINKCHANGE_SPEED_40G] = 40000,
1262 [MCDI_EVENT_LINKCHANGE_SPEED_25G] = 25000,
1263 [MCDI_EVENT_LINKCHANGE_SPEED_50G] = 50000,
1264 [MCDI_EVENT_LINKCHANGE_SPEED_100G] = 100000,
1265 };
1266
efx_mcdi_process_link_change(struct efx_nic * efx,efx_qword_t * ev)1267 void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev)
1268 {
1269 u32 flags, fcntl, speed, lpa;
1270
1271 speed = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_SPEED);
1272 EFX_WARN_ON_PARANOID(speed >= ARRAY_SIZE(efx_mcdi_event_link_speed));
1273 speed = efx_mcdi_event_link_speed[speed];
1274
1275 flags = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LINK_FLAGS);
1276 fcntl = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_FCNTL);
1277 lpa = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LP_CAP);
1278
1279 /* efx->link_state is only modified by efx_mcdi_phy_get_link(),
1280 * which is only run after flushing the event queues. Therefore, it
1281 * is safe to modify the link state outside of the mac_lock here.
1282 */
1283 efx_mcdi_phy_decode_link(efx, &efx->link_state, speed, flags, fcntl);
1284
1285 efx_mcdi_phy_check_fcntl(efx, lpa);
1286
1287 efx_link_status_changed(efx);
1288 }
1289