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 int rc;
75
76 BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0);
77
78 MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities);
79 MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags);
80 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode);
81 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed);
82
83 rc = efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf),
84 NULL, 0, NULL);
85 return rc;
86 }
87
efx_mcdi_loopback_modes(struct efx_nic * efx,u64 * loopback_modes)88 int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes)
89 {
90 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LOOPBACK_MODES_OUT_LEN);
91 size_t outlen;
92 int rc;
93
94 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0,
95 outbuf, sizeof(outbuf), &outlen);
96 if (rc)
97 goto fail;
98
99 if (outlen < (MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_OFST +
100 MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN)) {
101 rc = -EIO;
102 goto fail;
103 }
104
105 *loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_OUT_SUGGESTED);
106
107 return 0;
108
109 fail:
110 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
111 return rc;
112 }
113
mcdi_to_ethtool_linkset(u32 media,u32 cap,unsigned long * linkset)114 void mcdi_to_ethtool_linkset(u32 media, u32 cap, unsigned long *linkset)
115 {
116 #define SET_BIT(name) __set_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
117 linkset)
118
119 bitmap_zero(linkset, __ETHTOOL_LINK_MODE_MASK_NBITS);
120 switch (media) {
121 case MC_CMD_MEDIA_KX4:
122 SET_BIT(Backplane);
123 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
124 SET_BIT(1000baseKX_Full);
125 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
126 SET_BIT(10000baseKX4_Full);
127 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
128 SET_BIT(40000baseKR4_Full);
129 break;
130
131 case MC_CMD_MEDIA_XFP:
132 case MC_CMD_MEDIA_SFP_PLUS:
133 case MC_CMD_MEDIA_QSFP_PLUS:
134 SET_BIT(FIBRE);
135 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
136 SET_BIT(1000baseT_Full);
137 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
138 SET_BIT(10000baseT_Full);
139 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
140 SET_BIT(40000baseCR4_Full);
141 if (cap & (1 << MC_CMD_PHY_CAP_100000FDX_LBN))
142 SET_BIT(100000baseCR4_Full);
143 if (cap & (1 << MC_CMD_PHY_CAP_25000FDX_LBN))
144 SET_BIT(25000baseCR_Full);
145 if (cap & (1 << MC_CMD_PHY_CAP_50000FDX_LBN))
146 SET_BIT(50000baseCR2_Full);
147 break;
148
149 case MC_CMD_MEDIA_BASE_T:
150 SET_BIT(TP);
151 if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
152 SET_BIT(10baseT_Half);
153 if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
154 SET_BIT(10baseT_Full);
155 if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
156 SET_BIT(100baseT_Half);
157 if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
158 SET_BIT(100baseT_Full);
159 if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
160 SET_BIT(1000baseT_Half);
161 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
162 SET_BIT(1000baseT_Full);
163 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
164 SET_BIT(10000baseT_Full);
165 break;
166 }
167
168 if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
169 SET_BIT(Pause);
170 if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
171 SET_BIT(Asym_Pause);
172 if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
173 SET_BIT(Autoneg);
174
175 #undef SET_BIT
176 }
177
ethtool_linkset_to_mcdi_cap(const unsigned long * linkset)178 u32 ethtool_linkset_to_mcdi_cap(const unsigned long *linkset)
179 {
180 u32 result = 0;
181
182 #define TEST_BIT(name) test_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
183 linkset)
184
185 if (TEST_BIT(10baseT_Half))
186 result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
187 if (TEST_BIT(10baseT_Full))
188 result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
189 if (TEST_BIT(100baseT_Half))
190 result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
191 if (TEST_BIT(100baseT_Full))
192 result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
193 if (TEST_BIT(1000baseT_Half))
194 result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
195 if (TEST_BIT(1000baseT_Full) || TEST_BIT(1000baseKX_Full))
196 result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
197 if (TEST_BIT(10000baseT_Full) || TEST_BIT(10000baseKX4_Full))
198 result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
199 if (TEST_BIT(40000baseCR4_Full) || TEST_BIT(40000baseKR4_Full))
200 result |= (1 << MC_CMD_PHY_CAP_40000FDX_LBN);
201 if (TEST_BIT(100000baseCR4_Full))
202 result |= (1 << MC_CMD_PHY_CAP_100000FDX_LBN);
203 if (TEST_BIT(25000baseCR_Full))
204 result |= (1 << MC_CMD_PHY_CAP_25000FDX_LBN);
205 if (TEST_BIT(50000baseCR2_Full))
206 result |= (1 << MC_CMD_PHY_CAP_50000FDX_LBN);
207 if (TEST_BIT(Pause))
208 result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
209 if (TEST_BIT(Asym_Pause))
210 result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
211 if (TEST_BIT(Autoneg))
212 result |= (1 << MC_CMD_PHY_CAP_AN_LBN);
213
214 #undef TEST_BIT
215
216 return result;
217 }
218
efx_get_mcdi_phy_flags(struct efx_nic * efx)219 u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
220 {
221 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
222 enum efx_phy_mode mode, supported;
223 u32 flags;
224
225 /* TODO: Advertise the capabilities supported by this PHY */
226 supported = 0;
227 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_TXDIS_LBN))
228 supported |= PHY_MODE_TX_DISABLED;
229 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_LOWPOWER_LBN))
230 supported |= PHY_MODE_LOW_POWER;
231 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_POWEROFF_LBN))
232 supported |= PHY_MODE_OFF;
233
234 mode = efx->phy_mode & supported;
235
236 flags = 0;
237 if (mode & PHY_MODE_TX_DISABLED)
238 flags |= (1 << MC_CMD_SET_LINK_IN_TXDIS_LBN);
239 if (mode & PHY_MODE_LOW_POWER)
240 flags |= (1 << MC_CMD_SET_LINK_IN_LOWPOWER_LBN);
241 if (mode & PHY_MODE_OFF)
242 flags |= (1 << MC_CMD_SET_LINK_IN_POWEROFF_LBN);
243
244 return flags;
245 }
246
mcdi_to_ethtool_media(u32 media)247 u8 mcdi_to_ethtool_media(u32 media)
248 {
249 switch (media) {
250 case MC_CMD_MEDIA_XAUI:
251 case MC_CMD_MEDIA_CX4:
252 case MC_CMD_MEDIA_KX4:
253 return PORT_OTHER;
254
255 case MC_CMD_MEDIA_XFP:
256 case MC_CMD_MEDIA_SFP_PLUS:
257 case MC_CMD_MEDIA_QSFP_PLUS:
258 return PORT_FIBRE;
259
260 case MC_CMD_MEDIA_BASE_T:
261 return PORT_TP;
262
263 default:
264 return PORT_OTHER;
265 }
266 }
267
efx_mcdi_phy_decode_link(struct efx_nic * efx,struct efx_link_state * link_state,u32 speed,u32 flags,u32 fcntl)268 void efx_mcdi_phy_decode_link(struct efx_nic *efx,
269 struct efx_link_state *link_state,
270 u32 speed, u32 flags, u32 fcntl)
271 {
272 switch (fcntl) {
273 case MC_CMD_FCNTL_AUTO:
274 WARN_ON(1); /* This is not a link mode */
275 link_state->fc = EFX_FC_AUTO | EFX_FC_TX | EFX_FC_RX;
276 break;
277 case MC_CMD_FCNTL_BIDIR:
278 link_state->fc = EFX_FC_TX | EFX_FC_RX;
279 break;
280 case MC_CMD_FCNTL_RESPOND:
281 link_state->fc = EFX_FC_RX;
282 break;
283 default:
284 WARN_ON(1);
285 fallthrough;
286 case MC_CMD_FCNTL_OFF:
287 link_state->fc = 0;
288 break;
289 }
290
291 link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_OUT_LINK_UP_LBN));
292 link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_OUT_FULL_DUPLEX_LBN));
293 link_state->speed = speed;
294 }
295
296 /* The semantics of the ethtool FEC mode bitmask are not well defined,
297 * particularly the meaning of combinations of bits. Which means we get to
298 * define our own semantics, as follows:
299 * OFF overrides any other bits, and means "disable all FEC" (with the
300 * exception of 25G KR4/CR4, where it is not possible to reject it if AN
301 * partner requests it).
302 * AUTO on its own means use cable requirements and link partner autoneg with
303 * fw-default preferences for the cable type.
304 * AUTO and either RS or BASER means use the specified FEC type if cable and
305 * link partner support it, otherwise autoneg/fw-default.
306 * RS or BASER alone means use the specified FEC type if cable and link partner
307 * support it and either requests it, otherwise no FEC.
308 * Both RS and BASER (whether AUTO or not) means use FEC if cable and link
309 * partner support it, preferring RS to BASER.
310 */
ethtool_fec_caps_to_mcdi(u32 supported_cap,u32 ethtool_cap)311 u32 ethtool_fec_caps_to_mcdi(u32 supported_cap, u32 ethtool_cap)
312 {
313 u32 ret = 0;
314
315 if (ethtool_cap & ETHTOOL_FEC_OFF)
316 return 0;
317
318 if (ethtool_cap & ETHTOOL_FEC_AUTO)
319 ret |= ((1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
320 (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
321 (1 << MC_CMD_PHY_CAP_RS_FEC_LBN)) & supported_cap;
322 if (ethtool_cap & ETHTOOL_FEC_RS &&
323 supported_cap & (1 << MC_CMD_PHY_CAP_RS_FEC_LBN))
324 ret |= (1 << MC_CMD_PHY_CAP_RS_FEC_LBN) |
325 (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN);
326 if (ethtool_cap & ETHTOOL_FEC_BASER) {
327 if (supported_cap & (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN))
328 ret |= (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
329 (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN);
330 if (supported_cap & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN))
331 ret |= (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
332 (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN);
333 }
334 return ret;
335 }
336
337 /* Invert ethtool_fec_caps_to_mcdi. There are two combinations that function
338 * can never produce, (baser xor rs) and neither req; the implementation below
339 * maps both of those to AUTO. This should never matter, and it's not clear
340 * what a better mapping would be anyway.
341 */
mcdi_fec_caps_to_ethtool(u32 caps,bool is_25g)342 u32 mcdi_fec_caps_to_ethtool(u32 caps, bool is_25g)
343 {
344 bool rs = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_LBN),
345 rs_req = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN),
346 baser = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN)
347 : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN),
348 baser_req = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN)
349 : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN);
350
351 if (!baser && !rs)
352 return ETHTOOL_FEC_OFF;
353 return (rs_req ? ETHTOOL_FEC_RS : 0) |
354 (baser_req ? ETHTOOL_FEC_BASER : 0) |
355 (baser == baser_req && rs == rs_req ? 0 : ETHTOOL_FEC_AUTO);
356 }
357
358 /* Verify that the forced flow control settings (!EFX_FC_AUTO) are
359 * supported by the link partner. Warn the user if this isn't the case
360 */
efx_mcdi_phy_check_fcntl(struct efx_nic * efx,u32 lpa)361 void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
362 {
363 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
364 u32 rmtadv;
365
366 /* The link partner capabilities are only relevant if the
367 * link supports flow control autonegotiation
368 */
369 if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
370 return;
371
372 /* If flow control autoneg is supported and enabled, then fine */
373 if (efx->wanted_fc & EFX_FC_AUTO)
374 return;
375
376 rmtadv = 0;
377 if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
378 rmtadv |= ADVERTISED_Pause;
379 if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
380 rmtadv |= ADVERTISED_Asym_Pause;
381
382 if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause)
383 netif_err(efx, link, efx->net_dev,
384 "warning: link partner doesn't support pause frames");
385 }
386
efx_mcdi_phy_poll(struct efx_nic * efx)387 bool efx_mcdi_phy_poll(struct efx_nic *efx)
388 {
389 struct efx_link_state old_state = efx->link_state;
390 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
391 int rc;
392
393 WARN_ON(!mutex_is_locked(&efx->mac_lock));
394
395 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
396
397 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
398 outbuf, sizeof(outbuf), NULL);
399 if (rc)
400 efx->link_state.up = false;
401 else
402 efx_mcdi_phy_decode_link(
403 efx, &efx->link_state,
404 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
405 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
406 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
407
408 return !efx_link_state_equal(&efx->link_state, &old_state);
409 }
410
efx_mcdi_phy_probe(struct efx_nic * efx)411 int efx_mcdi_phy_probe(struct efx_nic *efx)
412 {
413 struct efx_mcdi_phy_data *phy_data;
414 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
415 u32 caps;
416 int rc;
417
418 /* Initialise and populate phy_data */
419 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
420 if (phy_data == NULL)
421 return -ENOMEM;
422
423 rc = efx_mcdi_get_phy_cfg(efx, phy_data);
424 if (rc != 0)
425 goto fail;
426
427 /* Read initial link advertisement */
428 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
429 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
430 outbuf, sizeof(outbuf), NULL);
431 if (rc)
432 goto fail;
433
434 /* Fill out nic state */
435 efx->phy_data = phy_data;
436 efx->phy_type = phy_data->type;
437
438 efx->mdio_bus = phy_data->channel;
439 efx->mdio.prtad = phy_data->port;
440 efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22);
441 efx->mdio.mode_support = 0;
442 if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22))
443 efx->mdio.mode_support |= MDIO_SUPPORTS_C22;
444 if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22))
445 efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
446
447 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
448 if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
449 mcdi_to_ethtool_linkset(phy_data->media, caps,
450 efx->link_advertising);
451 else
452 phy_data->forced_cap = caps;
453
454 /* Assert that we can map efx -> mcdi loopback modes */
455 BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
456 BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
457 BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
458 BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
459 BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
460 BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
461 BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
462 BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
463 BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
464 BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
465 BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
466 BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
467 BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
468 BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
469 BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
470 BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
471 BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
472 BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
473 BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
474 BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
475 BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
476 BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
477 BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
478 BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
479 BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
480 BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
481 BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);
482
483 rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
484 if (rc != 0)
485 goto fail;
486 /* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
487 * but by convention we don't
488 */
489 efx->loopback_modes &= ~(1 << LOOPBACK_NONE);
490
491 /* Set the initial link mode */
492 efx_mcdi_phy_decode_link(efx, &efx->link_state,
493 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
494 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
495 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
496
497 /* Record the initial FEC configuration (or nearest approximation
498 * representable in the ethtool configuration space)
499 */
500 efx->fec_config = mcdi_fec_caps_to_ethtool(caps,
501 efx->link_state.speed == 25000 ||
502 efx->link_state.speed == 50000);
503
504 /* Default to Autonegotiated flow control if the PHY supports it */
505 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
506 if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
507 efx->wanted_fc |= EFX_FC_AUTO;
508 efx_link_set_wanted_fc(efx, efx->wanted_fc);
509
510 return 0;
511
512 fail:
513 kfree(phy_data);
514 return rc;
515 }
516
efx_mcdi_phy_remove(struct efx_nic * efx)517 void efx_mcdi_phy_remove(struct efx_nic *efx)
518 {
519 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
520
521 efx->phy_data = NULL;
522 kfree(phy_data);
523 }
524
efx_mcdi_phy_get_link_ksettings(struct efx_nic * efx,struct ethtool_link_ksettings * cmd)525 void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx, struct ethtool_link_ksettings *cmd)
526 {
527 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
528 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
529 int rc;
530
531 cmd->base.speed = efx->link_state.speed;
532 cmd->base.duplex = efx->link_state.fd;
533 cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media);
534 cmd->base.phy_address = phy_cfg->port;
535 cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg);
536 cmd->base.mdio_support = (efx->mdio.mode_support &
537 (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));
538
539 mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap,
540 cmd->link_modes.supported);
541 memcpy(cmd->link_modes.advertising, efx->link_advertising,
542 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));
543
544 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
545 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
546 outbuf, sizeof(outbuf), NULL);
547 if (rc)
548 return;
549 mcdi_to_ethtool_linkset(phy_cfg->media,
550 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP),
551 cmd->link_modes.lp_advertising);
552 }
553
efx_mcdi_phy_set_link_ksettings(struct efx_nic * efx,const struct ethtool_link_ksettings * cmd)554 int efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx, const struct ethtool_link_ksettings *cmd)
555 {
556 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
557 u32 caps;
558 int rc;
559
560 if (cmd->base.autoneg) {
561 caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) |
562 1 << MC_CMD_PHY_CAP_AN_LBN);
563 } else if (cmd->base.duplex) {
564 switch (cmd->base.speed) {
565 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break;
566 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break;
567 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break;
568 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break;
569 case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break;
570 case 100000: caps = 1 << MC_CMD_PHY_CAP_100000FDX_LBN; break;
571 case 25000: caps = 1 << MC_CMD_PHY_CAP_25000FDX_LBN; break;
572 case 50000: caps = 1 << MC_CMD_PHY_CAP_50000FDX_LBN; break;
573 default: return -EINVAL;
574 }
575 } else {
576 switch (cmd->base.speed) {
577 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break;
578 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break;
579 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break;
580 default: return -EINVAL;
581 }
582 }
583
584 caps |= ethtool_fec_caps_to_mcdi(phy_cfg->supported_cap, efx->fec_config);
585
586 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
587 efx->loopback_mode, 0);
588 if (rc)
589 return rc;
590
591 if (cmd->base.autoneg) {
592 efx_link_set_advertising(efx, cmd->link_modes.advertising);
593 phy_cfg->forced_cap = 0;
594 } else {
595 efx_link_clear_advertising(efx);
596 phy_cfg->forced_cap = caps;
597 }
598 return 0;
599 }
600
efx_mcdi_phy_get_fecparam(struct efx_nic * efx,struct ethtool_fecparam * fec)601 int efx_mcdi_phy_get_fecparam(struct efx_nic *efx, struct ethtool_fecparam *fec)
602 {
603 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_V2_LEN);
604 u32 caps, active, speed; /* MCDI format */
605 bool is_25g = false;
606 size_t outlen;
607 int rc;
608
609 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
610 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
611 outbuf, sizeof(outbuf), &outlen);
612 if (rc)
613 return rc;
614 if (outlen < MC_CMD_GET_LINK_OUT_V2_LEN)
615 return -EOPNOTSUPP;
616
617 /* behaviour for 25G/50G links depends on 25G BASER bit */
618 speed = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_LINK_SPEED);
619 is_25g = speed == 25000 || speed == 50000;
620
621 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_CAP);
622 fec->fec = mcdi_fec_caps_to_ethtool(caps, is_25g);
623 /* BASER is never supported on 100G */
624 if (speed == 100000)
625 fec->fec &= ~ETHTOOL_FEC_BASER;
626
627 active = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_FEC_TYPE);
628 switch (active) {
629 case MC_CMD_FEC_NONE:
630 fec->active_fec = ETHTOOL_FEC_OFF;
631 break;
632 case MC_CMD_FEC_BASER:
633 fec->active_fec = ETHTOOL_FEC_BASER;
634 break;
635 case MC_CMD_FEC_RS:
636 fec->active_fec = ETHTOOL_FEC_RS;
637 break;
638 default:
639 netif_warn(efx, hw, efx->net_dev,
640 "Firmware reports unrecognised FEC_TYPE %u\n",
641 active);
642 /* We don't know what firmware has picked. AUTO is as good a
643 * "can't happen" value as any other.
644 */
645 fec->active_fec = ETHTOOL_FEC_AUTO;
646 break;
647 }
648
649 return 0;
650 }
651
652 /* Basic validation to ensure that the caps we are going to attempt to set are
653 * in fact supported by the adapter. Note that 'no FEC' is always supported.
654 */
ethtool_fec_supported(u32 supported_cap,u32 ethtool_cap)655 static int ethtool_fec_supported(u32 supported_cap, u32 ethtool_cap)
656 {
657 if (ethtool_cap & ETHTOOL_FEC_OFF)
658 return 0;
659
660 if (ethtool_cap &&
661 !ethtool_fec_caps_to_mcdi(supported_cap, ethtool_cap))
662 return -EINVAL;
663 return 0;
664 }
665
efx_mcdi_phy_set_fecparam(struct efx_nic * efx,const struct ethtool_fecparam * fec)666 int efx_mcdi_phy_set_fecparam(struct efx_nic *efx, const struct ethtool_fecparam *fec)
667 {
668 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
669 u32 caps;
670 int rc;
671
672 rc = ethtool_fec_supported(phy_cfg->supported_cap, fec->fec);
673 if (rc)
674 return rc;
675
676 /* Work out what efx_mcdi_phy_set_link_ksettings() would produce from
677 * saved advertising bits
678 */
679 if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, efx->link_advertising))
680 caps = (ethtool_linkset_to_mcdi_cap(efx->link_advertising) |
681 1 << MC_CMD_PHY_CAP_AN_LBN);
682 else
683 caps = phy_cfg->forced_cap;
684
685 caps |= ethtool_fec_caps_to_mcdi(phy_cfg->supported_cap, fec->fec);
686 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
687 efx->loopback_mode, 0);
688 if (rc)
689 return rc;
690
691 /* Record the new FEC setting for subsequent set_link calls */
692 efx->fec_config = fec->fec;
693 return 0;
694 }
695
efx_mcdi_phy_test_alive(struct efx_nic * efx)696 int efx_mcdi_phy_test_alive(struct efx_nic *efx)
697 {
698 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_STATE_OUT_LEN);
699 size_t outlen;
700 int rc;
701
702 BUILD_BUG_ON(MC_CMD_GET_PHY_STATE_IN_LEN != 0);
703
704 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_STATE, NULL, 0,
705 outbuf, sizeof(outbuf), &outlen);
706 if (rc)
707 return rc;
708
709 if (outlen < MC_CMD_GET_PHY_STATE_OUT_LEN)
710 return -EIO;
711 if (MCDI_DWORD(outbuf, GET_PHY_STATE_OUT_STATE) != MC_CMD_PHY_STATE_OK)
712 return -EINVAL;
713
714 return 0;
715 }
716
efx_mcdi_port_reconfigure(struct efx_nic * efx)717 int efx_mcdi_port_reconfigure(struct efx_nic *efx)
718 {
719 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
720 u32 caps = (efx->link_advertising[0] ?
721 ethtool_linkset_to_mcdi_cap(efx->link_advertising) :
722 phy_cfg->forced_cap);
723
724 caps |= ethtool_fec_caps_to_mcdi(phy_cfg->supported_cap, efx->fec_config);
725
726 return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
727 efx->loopback_mode, 0);
728 }
729
730 static const char *const mcdi_sft9001_cable_diag_names[] = {
731 "cable.pairA.length",
732 "cable.pairB.length",
733 "cable.pairC.length",
734 "cable.pairD.length",
735 "cable.pairA.status",
736 "cable.pairB.status",
737 "cable.pairC.status",
738 "cable.pairD.status",
739 };
740
efx_mcdi_bist(struct efx_nic * efx,unsigned int bist_mode,int * results)741 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode,
742 int *results)
743 {
744 unsigned int retry, i, count = 0;
745 size_t outlen;
746 u32 status;
747 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN);
748 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN);
749 u8 *ptr;
750 int rc;
751
752 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0);
753 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode);
754 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST,
755 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL);
756 if (rc)
757 goto out;
758
759 /* Wait up to 10s for BIST to finish */
760 for (retry = 0; retry < 100; ++retry) {
761 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0);
762 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0,
763 outbuf, sizeof(outbuf), &outlen);
764 if (rc)
765 goto out;
766
767 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT);
768 if (status != MC_CMD_POLL_BIST_RUNNING)
769 goto finished;
770
771 msleep(100);
772 }
773
774 rc = -ETIMEDOUT;
775 goto out;
776
777 finished:
778 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1;
779
780 /* SFT9001 specific cable diagnostics output */
781 if (efx->phy_type == PHY_TYPE_SFT9001B &&
782 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT ||
783 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) {
784 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A);
785 if (status == MC_CMD_POLL_BIST_PASSED &&
786 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) {
787 for (i = 0; i < 8; i++) {
788 results[count + i] =
789 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i],
790 EFX_DWORD_0);
791 }
792 }
793 count += 8;
794 }
795 rc = count;
796
797 out:
798 return rc;
799 }
800
efx_mcdi_phy_run_tests(struct efx_nic * efx,int * results,unsigned int flags)801 int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results, unsigned int flags)
802 {
803 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
804 u32 mode;
805 int rc;
806
807 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
808 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results);
809 if (rc < 0)
810 return rc;
811
812 results += rc;
813 }
814
815 /* If we support both LONG and SHORT, then run each in response to
816 * break or not. Otherwise, run the one we support
817 */
818 mode = 0;
819 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) {
820 if ((flags & ETH_TEST_FL_OFFLINE) &&
821 (phy_cfg->flags &
822 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)))
823 mode = MC_CMD_PHY_BIST_CABLE_LONG;
824 else
825 mode = MC_CMD_PHY_BIST_CABLE_SHORT;
826 } else if (phy_cfg->flags &
827 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))
828 mode = MC_CMD_PHY_BIST_CABLE_LONG;
829
830 if (mode != 0) {
831 rc = efx_mcdi_bist(efx, mode, results);
832 if (rc < 0)
833 return rc;
834 results += rc;
835 }
836
837 return 0;
838 }
839
efx_mcdi_phy_test_name(struct efx_nic * efx,unsigned int index)840 const char *efx_mcdi_phy_test_name(struct efx_nic *efx, unsigned int index)
841 {
842 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
843
844 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
845 if (index == 0)
846 return "bist";
847 --index;
848 }
849
850 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) |
851 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) {
852 if (index == 0)
853 return "cable";
854 --index;
855
856 if (efx->phy_type == PHY_TYPE_SFT9001B) {
857 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names))
858 return mcdi_sft9001_cable_diag_names[index];
859 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names);
860 }
861 }
862
863 return NULL;
864 }
865
866 #define SFP_PAGE_SIZE 128
867 #define SFF_DIAG_TYPE_OFFSET 92
868 #define SFF_DIAG_ADDR_CHANGE BIT(2)
869 #define SFF_8079_NUM_PAGES 2
870 #define SFF_8472_NUM_PAGES 4
871 #define SFF_8436_NUM_PAGES 5
872 #define SFF_DMT_LEVEL_OFFSET 94
873
874 /** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom
875 * @efx: NIC context
876 * @page: EEPROM page number
877 * @data: Destination data pointer
878 * @offset: Offset in page to copy from in to data
879 * @space: Space available in data
880 *
881 * Return:
882 * >=0 - amount of data copied
883 * <0 - error
884 */
efx_mcdi_phy_get_module_eeprom_page(struct efx_nic * efx,unsigned int page,u8 * data,ssize_t offset,ssize_t space)885 static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx,
886 unsigned int page,
887 u8 *data, ssize_t offset,
888 ssize_t space)
889 {
890 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
891 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
892 unsigned int payload_len;
893 unsigned int to_copy;
894 size_t outlen;
895 int rc;
896
897 if (offset > SFP_PAGE_SIZE)
898 return -EINVAL;
899
900 to_copy = min(space, SFP_PAGE_SIZE - offset);
901
902 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
903 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO,
904 inbuf, sizeof(inbuf),
905 outbuf, sizeof(outbuf),
906 &outlen);
907
908 if (rc)
909 return rc;
910
911 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
912 SFP_PAGE_SIZE))
913 return -EIO;
914
915 payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN);
916 if (payload_len != SFP_PAGE_SIZE)
917 return -EIO;
918
919 memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset,
920 to_copy);
921
922 return to_copy;
923 }
924
efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic * efx,unsigned int page,u8 byte)925 static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx,
926 unsigned int page,
927 u8 byte)
928 {
929 u8 data;
930 int rc;
931
932 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1);
933 if (rc == 1)
934 return data;
935
936 return rc;
937 }
938
efx_mcdi_phy_diag_type(struct efx_nic * efx)939 static int efx_mcdi_phy_diag_type(struct efx_nic *efx)
940 {
941 /* Page zero of the EEPROM includes the diagnostic type at byte 92. */
942 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
943 SFF_DIAG_TYPE_OFFSET);
944 }
945
efx_mcdi_phy_sff_8472_level(struct efx_nic * efx)946 static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx)
947 {
948 /* Page zero of the EEPROM includes the DMT level at byte 94. */
949 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
950 SFF_DMT_LEVEL_OFFSET);
951 }
952
efx_mcdi_phy_module_type(struct efx_nic * efx)953 static u32 efx_mcdi_phy_module_type(struct efx_nic *efx)
954 {
955 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
956
957 if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS)
958 return phy_data->media;
959
960 /* A QSFP+ NIC may actually have an SFP+ module attached.
961 * The ID is page 0, byte 0.
962 */
963 switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) {
964 case 0x3:
965 return MC_CMD_MEDIA_SFP_PLUS;
966 case 0xc:
967 case 0xd:
968 return MC_CMD_MEDIA_QSFP_PLUS;
969 default:
970 return 0;
971 }
972 }
973
efx_mcdi_phy_get_module_eeprom(struct efx_nic * efx,struct ethtool_eeprom * ee,u8 * data)974 int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx, struct ethtool_eeprom *ee, u8 *data)
975 {
976 int rc;
977 ssize_t space_remaining = ee->len;
978 unsigned int page_off;
979 bool ignore_missing;
980 int num_pages;
981 int page;
982
983 switch (efx_mcdi_phy_module_type(efx)) {
984 case MC_CMD_MEDIA_SFP_PLUS:
985 num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ?
986 SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES;
987 page = 0;
988 ignore_missing = false;
989 break;
990 case MC_CMD_MEDIA_QSFP_PLUS:
991 num_pages = SFF_8436_NUM_PAGES;
992 page = -1; /* We obtain the lower page by asking for -1. */
993 ignore_missing = true; /* Ignore missing pages after page 0. */
994 break;
995 default:
996 return -EOPNOTSUPP;
997 }
998
999 page_off = ee->offset % SFP_PAGE_SIZE;
1000 page += ee->offset / SFP_PAGE_SIZE;
1001
1002 while (space_remaining && (page < num_pages)) {
1003 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page,
1004 data, page_off,
1005 space_remaining);
1006
1007 if (rc > 0) {
1008 space_remaining -= rc;
1009 data += rc;
1010 page_off = 0;
1011 page++;
1012 } else if (rc == 0) {
1013 space_remaining = 0;
1014 } else if (ignore_missing && (page > 0)) {
1015 int intended_size = SFP_PAGE_SIZE - page_off;
1016
1017 space_remaining -= intended_size;
1018 if (space_remaining < 0) {
1019 space_remaining = 0;
1020 } else {
1021 memset(data, 0, intended_size);
1022 data += intended_size;
1023 page_off = 0;
1024 page++;
1025 rc = 0;
1026 }
1027 } else {
1028 return rc;
1029 }
1030 }
1031
1032 return 0;
1033 }
1034
efx_mcdi_phy_get_module_info(struct efx_nic * efx,struct ethtool_modinfo * modinfo)1035 int efx_mcdi_phy_get_module_info(struct efx_nic *efx, struct ethtool_modinfo *modinfo)
1036 {
1037 int sff_8472_level;
1038 int diag_type;
1039
1040 switch (efx_mcdi_phy_module_type(efx)) {
1041 case MC_CMD_MEDIA_SFP_PLUS:
1042 sff_8472_level = efx_mcdi_phy_sff_8472_level(efx);
1043
1044 /* If we can't read the diagnostics level we have none. */
1045 if (sff_8472_level < 0)
1046 return -EOPNOTSUPP;
1047
1048 /* Check if this module requires the (unsupported) address
1049 * change operation.
1050 */
1051 diag_type = efx_mcdi_phy_diag_type(efx);
1052
1053 if (sff_8472_level == 0 ||
1054 (diag_type & SFF_DIAG_ADDR_CHANGE)) {
1055 modinfo->type = ETH_MODULE_SFF_8079;
1056 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
1057 } else {
1058 modinfo->type = ETH_MODULE_SFF_8472;
1059 modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
1060 }
1061 break;
1062
1063 case MC_CMD_MEDIA_QSFP_PLUS:
1064 modinfo->type = ETH_MODULE_SFF_8436;
1065 modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
1066 break;
1067
1068 default:
1069 return -EOPNOTSUPP;
1070 }
1071
1072 return 0;
1073 }
1074
efx_calc_mac_mtu(struct efx_nic * efx)1075 static unsigned int efx_calc_mac_mtu(struct efx_nic *efx)
1076 {
1077 return EFX_MAX_FRAME_LEN(efx->net_dev->mtu);
1078 }
1079
efx_mcdi_set_mac(struct efx_nic * efx)1080 int efx_mcdi_set_mac(struct efx_nic *efx)
1081 {
1082 u32 fcntl;
1083 MCDI_DECLARE_BUF(cmdbytes, MC_CMD_SET_MAC_IN_LEN);
1084
1085 BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
1086
1087 /* This has no effect on EF10 */
1088 ether_addr_copy(MCDI_PTR(cmdbytes, SET_MAC_IN_ADDR),
1089 efx->net_dev->dev_addr);
1090
1091 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU, efx_calc_mac_mtu(efx));
1092 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0);
1093
1094 /* Set simple MAC filter for Siena */
1095 MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_REJECT,
1096 SET_MAC_IN_REJECT_UNCST, efx->unicast_filter);
1097
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
