?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / ethernet / sfc / mcdi_port.c
blobab5227b13ae60aa046a567f29062c50e0d309875
1 // SPDX-License-Identifier: GPL-2.0-only
2 /****************************************************************************
3 * Driver for Solarflare network controllers and boards
4 * Copyright 2009-2013 Solarflare Communications Inc.
5 */
6
7 /*
8 * Driver for PHY related operations via MCDI.
9 */
10
11 #include <linux/slab.h>
12 #include "efx.h"
13 #include "mcdi.h"
14 #include "mcdi_pcol.h"
15 #include "nic.h"
16 #include "selftest.h"
17 #include "mcdi_port_common.h"
18
19 static int efx_mcdi_mdio_read(struct net_device *net_dev,
20 int prtad, int devad, u16 addr)
21 {
22 struct efx_nic *efx = netdev_priv(net_dev);
23 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN);
24 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN);
25 size_t outlen;
26 int rc;
27
28 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_bus);
29 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad);
30 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad);
31 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr);
32
33 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf),
34 outbuf, sizeof(outbuf), &outlen);
35 if (rc)
36 return rc;
37
38 if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) !=
39 MC_CMD_MDIO_STATUS_GOOD)
40 return -EIO;
41
42 return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE);
43 }
44
45 static int efx_mcdi_mdio_write(struct net_device *net_dev,
46 int prtad, int devad, u16 addr, u16 value)
47 {
48 struct efx_nic *efx = netdev_priv(net_dev);
49 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN);
50 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN);
51 size_t outlen;
52 int rc;
53
54 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_bus);
55 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad);
56 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad);
57 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr);
58 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value);
59
60 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf),
61 outbuf, sizeof(outbuf), &outlen);
62 if (rc)
63 return rc;
64
65 if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) !=
66 MC_CMD_MDIO_STATUS_GOOD)
67 return -EIO;
68
69 return 0;
70 }
71
72 static int efx_mcdi_phy_probe(struct efx_nic *efx)
73 {
74 struct efx_mcdi_phy_data *phy_data;
75 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
76 u32 caps;
77 int rc;
78
79 /* Initialise and populate phy_data */
80 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
81 if (phy_data == NULL)
82 return -ENOMEM;
83
84 rc = efx_mcdi_get_phy_cfg(efx, phy_data);
85 if (rc != 0)
86 goto fail;
87
88 /* Read initial link advertisement */
89 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
90 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
91 outbuf, sizeof(outbuf), NULL);
92 if (rc)
93 goto fail;
94
95 /* Fill out nic state */
96 efx->phy_data = phy_data;
97 efx->phy_type = phy_data->type;
98
99 efx->mdio_bus = phy_data->channel;
100 efx->mdio.prtad = phy_data->port;
101 efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22);
102 efx->mdio.mode_support = 0;
103 if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22))
104 efx->mdio.mode_support |= MDIO_SUPPORTS_C22;
105 if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22))
106 efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
107
108 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
109 if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
110 mcdi_to_ethtool_linkset(phy_data->media, caps,
111 efx->link_advertising);
112 else
113 phy_data->forced_cap = caps;
114
115 /* Assert that we can map efx -> mcdi loopback modes */
116 BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
117 BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
118 BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
119 BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
120 BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
121 BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
122 BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
123 BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
124 BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
125 BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
126 BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
127 BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
128 BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
129 BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
130 BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
131 BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
132 BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
133 BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
134 BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
135 BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
136 BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
137 BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
138 BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
139 BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
140 BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
141 BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
142 BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);
143
144 rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
145 if (rc != 0)
146 goto fail;
147 /* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
148 * but by convention we don't */
149 efx->loopback_modes &= ~(1 << LOOPBACK_NONE);
150
151 /* Set the initial link mode */
152 efx_mcdi_phy_decode_link(
153 efx, &efx->link_state,
154 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
155 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
156 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
157
158 /* Record the initial FEC configuration (or nearest approximation
159 * representable in the ethtool configuration space)
160 */
161 efx->fec_config = mcdi_fec_caps_to_ethtool(caps,
162 efx->link_state.speed == 25000 ||
163 efx->link_state.speed == 50000);
164
165 /* Default to Autonegotiated flow control if the PHY supports it */
166 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
167 if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
168 efx->wanted_fc |= EFX_FC_AUTO;
169 efx_link_set_wanted_fc(efx, efx->wanted_fc);
170
171 return 0;
172
173 fail:
174 kfree(phy_data);
175 return rc;
176 }
177
178 int efx_mcdi_port_reconfigure(struct efx_nic *efx)
179 {
180 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
181 u32 caps = (efx->link_advertising[0] ?
182 ethtool_linkset_to_mcdi_cap(efx->link_advertising) :
183 phy_cfg->forced_cap);
184
185 caps |= ethtool_fec_caps_to_mcdi(efx->fec_config);
186
187 return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
188 efx->loopback_mode, 0);
189 }
190
191 static void efx_mcdi_phy_remove(struct efx_nic *efx)
192 {
193 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
194
195 efx->phy_data = NULL;
196 kfree(phy_data);
197 }
198
199 static void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx,
200 struct ethtool_link_ksettings *cmd)
201 {
202 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
203 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
204 int rc;
205
206 cmd->base.speed = efx->link_state.speed;
207 cmd->base.duplex = efx->link_state.fd;
208 cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media);
209 cmd->base.phy_address = phy_cfg->port;
210 cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg);
211 cmd->base.mdio_support = (efx->mdio.mode_support &
212 (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));
213
214 mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap,
215 cmd->link_modes.supported);
216 memcpy(cmd->link_modes.advertising, efx->link_advertising,
217 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));
218
219 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
220 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
221 outbuf, sizeof(outbuf), NULL);
222 if (rc)
223 return;
224 mcdi_to_ethtool_linkset(phy_cfg->media,
225 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP),
226 cmd->link_modes.lp_advertising);
227 }
228
229 static int
230 efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx,
231 const struct ethtool_link_ksettings *cmd)
232 {
233 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
234 u32 caps;
235 int rc;
236
237 if (cmd->base.autoneg) {
238 caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) |
239 1 << MC_CMD_PHY_CAP_AN_LBN);
240 } else if (cmd->base.duplex) {
241 switch (cmd->base.speed) {
242 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break;
243 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break;
244 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break;
245 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break;
246 case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break;
247 case 100000: caps = 1 << MC_CMD_PHY_CAP_100000FDX_LBN; break;
248 case 25000: caps = 1 << MC_CMD_PHY_CAP_25000FDX_LBN; break;
249 case 50000: caps = 1 << MC_CMD_PHY_CAP_50000FDX_LBN; break;
250 default: return -EINVAL;
251 }
252 } else {
253 switch (cmd->base.speed) {
254 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break;
255 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break;
256 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break;
257 default: return -EINVAL;
258 }
259 }
260
261 caps |= ethtool_fec_caps_to_mcdi(efx->fec_config);
262
263 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
264 efx->loopback_mode, 0);
265 if (rc)
266 return rc;
267
268 if (cmd->base.autoneg) {
269 efx_link_set_advertising(efx, cmd->link_modes.advertising);
270 phy_cfg->forced_cap = 0;
271 } else {
272 efx_link_clear_advertising(efx);
273 phy_cfg->forced_cap = caps;
274 }
275 return 0;
276 }
277
278 static int efx_mcdi_phy_set_fecparam(struct efx_nic *efx,
279 const struct ethtool_fecparam *fec)
280 {
281 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
282 u32 caps;
283 int rc;
284
285 /* Work out what efx_mcdi_phy_set_link_ksettings() would produce from
286 * saved advertising bits
287 */
288 if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, efx->link_advertising))
289 caps = (ethtool_linkset_to_mcdi_cap(efx->link_advertising) |
290 1 << MC_CMD_PHY_CAP_AN_LBN);
291 else
292 caps = phy_cfg->forced_cap;
293
294 caps |= ethtool_fec_caps_to_mcdi(fec->fec);
295 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
296 efx->loopback_mode, 0);
297 if (rc)
298 return rc;
299
300 /* Record the new FEC setting for subsequent set_link calls */
301 efx->fec_config = fec->fec;
302 return 0;
303 }
304
305 static const char *const mcdi_sft9001_cable_diag_names[] = {
306 "cable.pairA.length",
307 "cable.pairB.length",
308 "cable.pairC.length",
309 "cable.pairD.length",
310 "cable.pairA.status",
311 "cable.pairB.status",
312 "cable.pairC.status",
313 "cable.pairD.status",
314 };
315
316 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode,
317 int *results)
318 {
319 unsigned int retry, i, count = 0;
320 size_t outlen;
321 u32 status;
322 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN);
323 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN);
324 u8 *ptr;
325 int rc;
326
327 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0);
328 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode);
329 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST,
330 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL);
331 if (rc)
332 goto out;
333
334 /* Wait up to 10s for BIST to finish */
335 for (retry = 0; retry < 100; ++retry) {
336 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0);
337 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0,
338 outbuf, sizeof(outbuf), &outlen);
339 if (rc)
340 goto out;
341
342 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT);
343 if (status != MC_CMD_POLL_BIST_RUNNING)
344 goto finished;
345
346 msleep(100);
347 }
348
349 rc = -ETIMEDOUT;
350 goto out;
351
352 finished:
353 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1;
354
355 /* SFT9001 specific cable diagnostics output */
356 if (efx->phy_type == PHY_TYPE_SFT9001B &&
357 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT ||
358 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) {
359 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A);
360 if (status == MC_CMD_POLL_BIST_PASSED &&
361 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) {
362 for (i = 0; i < 8; i++) {
363 results[count + i] =
364 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i],
365 EFX_DWORD_0);
366 }
367 }
368 count += 8;
369 }
370 rc = count;
371
372 out:
373 return rc;
374 }
375
376 static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results,
377 unsigned flags)
378 {
379 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
380 u32 mode;
381 int rc;
382
383 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
384 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results);
385 if (rc < 0)
386 return rc;
387
388 results += rc;
389 }
390
391 /* If we support both LONG and SHORT, then run each in response to
392 * break or not. Otherwise, run the one we support */
393 mode = 0;
394 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) {
395 if ((flags & ETH_TEST_FL_OFFLINE) &&
396 (phy_cfg->flags &
397 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)))
398 mode = MC_CMD_PHY_BIST_CABLE_LONG;
399 else
400 mode = MC_CMD_PHY_BIST_CABLE_SHORT;
401 } else if (phy_cfg->flags &
402 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))
403 mode = MC_CMD_PHY_BIST_CABLE_LONG;
404
405 if (mode != 0) {
406 rc = efx_mcdi_bist(efx, mode, results);
407 if (rc < 0)
408 return rc;
409 results += rc;
410 }
411
412 return 0;
413 }
414
415 static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
416 unsigned int index)
417 {
418 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
419
420 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
421 if (index == 0)
422 return "bist";
423 --index;
424 }
425
426 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) |
427 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) {
428 if (index == 0)
429 return "cable";
430 --index;
431
432 if (efx->phy_type == PHY_TYPE_SFT9001B) {
433 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names))
434 return mcdi_sft9001_cable_diag_names[index];
435 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names);
436 }
437 }
438
439 return NULL;
440 }
441
442 #define SFP_PAGE_SIZE 128
443 #define SFF_DIAG_TYPE_OFFSET 92
444 #define SFF_DIAG_ADDR_CHANGE BIT(2)
445 #define SFF_8079_NUM_PAGES 2
446 #define SFF_8472_NUM_PAGES 4
447 #define SFF_8436_NUM_PAGES 5
448 #define SFF_DMT_LEVEL_OFFSET 94
449
450 /** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom
451 * @efx: NIC context
452 * @page: EEPROM page number
453 * @data: Destination data pointer
454 * @offset: Offset in page to copy from in to data
455 * @space: Space available in data
456 *
457 * Return:
458 * >=0 - amount of data copied
459 * <0 - error
460 */
461 static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx,
462 unsigned int page,
463 u8 *data, ssize_t offset,
464 ssize_t space)
465 {
466 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
467 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
468 size_t outlen;
469 unsigned int payload_len;
470 unsigned int to_copy;
471 int rc;
472
473 if (offset > SFP_PAGE_SIZE)
474 return -EINVAL;
475
476 to_copy = min(space, SFP_PAGE_SIZE - offset);
477
478 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
479 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO,
480 inbuf, sizeof(inbuf),
481 outbuf, sizeof(outbuf),
482 &outlen);
483
484 if (rc)
485 return rc;
486
487 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
488 SFP_PAGE_SIZE))
489 return -EIO;
490
491 payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN);
492 if (payload_len != SFP_PAGE_SIZE)
493 return -EIO;
494
495 memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset,
496 to_copy);
497
498 return to_copy;
499 }
500
501 static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx,
502 unsigned int page,
503 u8 byte)
504 {
505 int rc;
506 u8 data;
507
508 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1);
509 if (rc == 1)
510 return data;
511
512 return rc;
513 }
514
515 static int efx_mcdi_phy_diag_type(struct efx_nic *efx)
516 {
517 /* Page zero of the EEPROM includes the diagnostic type at byte 92. */
518 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
519 SFF_DIAG_TYPE_OFFSET);
520 }
521
522 static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx)
523 {
524 /* Page zero of the EEPROM includes the DMT level at byte 94. */
525 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
526 SFF_DMT_LEVEL_OFFSET);
527 }
528
529 static u32 efx_mcdi_phy_module_type(struct efx_nic *efx)
530 {
531 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
532
533 if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS)
534 return phy_data->media;
535
536 /* A QSFP+ NIC may actually have an SFP+ module attached.
537 * The ID is page 0, byte 0.
538 */
539 switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) {
540 case 0x3:
541 return MC_CMD_MEDIA_SFP_PLUS;
542 case 0xc:
543 case 0xd:
544 return MC_CMD_MEDIA_QSFP_PLUS;
545 default:
546 return 0;
547 }
548 }
549
550 static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
551 struct ethtool_eeprom *ee, u8 *data)
552 {
553 int rc;
554 ssize_t space_remaining = ee->len;
555 unsigned int page_off;
556 bool ignore_missing;
557 int num_pages;
558 int page;
559
560 switch (efx_mcdi_phy_module_type(efx)) {
561 case MC_CMD_MEDIA_SFP_PLUS:
562 num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ?
563 SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES;
564 page = 0;
565 ignore_missing = false;
566 break;
567 case MC_CMD_MEDIA_QSFP_PLUS:
568 num_pages = SFF_8436_NUM_PAGES;
569 page = -1; /* We obtain the lower page by asking for -1. */
570 ignore_missing = true; /* Ignore missing pages after page 0. */
571 break;
572 default:
573 return -EOPNOTSUPP;
574 }
575
576 page_off = ee->offset % SFP_PAGE_SIZE;
577 page += ee->offset / SFP_PAGE_SIZE;
578
579 while (space_remaining && (page < num_pages)) {
580 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page,
581 data, page_off,
582 space_remaining);
583
584 if (rc > 0) {
585 space_remaining -= rc;
586 data += rc;
587 page_off = 0;
588 page++;
589 } else if (rc == 0) {
590 space_remaining = 0;
591 } else if (ignore_missing && (page > 0)) {
592 int intended_size = SFP_PAGE_SIZE - page_off;
593
594 space_remaining -= intended_size;
595 if (space_remaining < 0) {
596 space_remaining = 0;
597 } else {
598 memset(data, 0, intended_size);
599 data += intended_size;
600 page_off = 0;
601 page++;
602 rc = 0;
603 }
604 } else {
605 return rc;
606 }
607 }
608
609 return 0;
610 }
611
612 static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
613 struct ethtool_modinfo *modinfo)
614 {
615 int sff_8472_level;
616 int diag_type;
617
618 switch (efx_mcdi_phy_module_type(efx)) {
619 case MC_CMD_MEDIA_SFP_PLUS:
620 sff_8472_level = efx_mcdi_phy_sff_8472_level(efx);
621
622 /* If we can't read the diagnostics level we have none. */
623 if (sff_8472_level < 0)
624 return -EOPNOTSUPP;
625
626 /* Check if this module requires the (unsupported) address
627 * change operation.
628 */
629 diag_type = efx_mcdi_phy_diag_type(efx);
630
631 if ((sff_8472_level == 0) ||
632 (diag_type & SFF_DIAG_ADDR_CHANGE)) {
633 modinfo->type = ETH_MODULE_SFF_8079;
634 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
635 } else {
636 modinfo->type = ETH_MODULE_SFF_8472;
637 modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
638 }
639 break;
640
641 case MC_CMD_MEDIA_QSFP_PLUS:
642 modinfo->type = ETH_MODULE_SFF_8436;
643 modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
644 break;
645
646 default:
647 return -EOPNOTSUPP;
648 }
649
650 return 0;
651 }
652
653 static const struct efx_phy_operations efx_mcdi_phy_ops = {
654 .probe = efx_mcdi_phy_probe,
655 .init = efx_port_dummy_op_int,
656 .reconfigure = efx_mcdi_port_reconfigure,
657 .poll = efx_mcdi_phy_poll,
658 .fini = efx_port_dummy_op_void,
659 .remove = efx_mcdi_phy_remove,
660 .get_link_ksettings = efx_mcdi_phy_get_link_ksettings,
661 .set_link_ksettings = efx_mcdi_phy_set_link_ksettings,
662 .get_fecparam = efx_mcdi_phy_get_fecparam,
663 .set_fecparam = efx_mcdi_phy_set_fecparam,
664 .test_alive = efx_mcdi_phy_test_alive,
665 .run_tests = efx_mcdi_phy_run_tests,
666 .test_name = efx_mcdi_phy_test_name,
667 .get_module_eeprom = efx_mcdi_phy_get_module_eeprom,
668 .get_module_info = efx_mcdi_phy_get_module_info,
669 };
670
671 u32 efx_mcdi_phy_get_caps(struct efx_nic *efx)
672 {
673 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
674
675 return phy_data->supported_cap;
676 }
677
678 bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
679 {
680 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
681 size_t outlength;
682 int rc;
683
684 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
685
686 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
687 outbuf, sizeof(outbuf), &outlength);
688 if (rc)
689 return true;
690
691 return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
692 }
693
694 enum efx_stats_action {
695 EFX_STATS_ENABLE,
696 EFX_STATS_DISABLE,
697 EFX_STATS_PULL,
698 };
699
700 static int efx_mcdi_mac_stats(struct efx_nic *efx,
701 enum efx_stats_action action, int clear)
702 {
703 MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
704 int rc;
705 int change = action == EFX_STATS_PULL ? 0 : 1;
706 int enable = action == EFX_STATS_ENABLE ? 1 : 0;
707 int period = action == EFX_STATS_ENABLE ? 1000 : 0;
708 dma_addr_t dma_addr = efx->stats_buffer.dma_addr;
709 u32 dma_len = action != EFX_STATS_DISABLE ?
710 efx->num_mac_stats * sizeof(u64) : 0;
711
712 BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
713
714 MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
715 MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
716 MAC_STATS_IN_DMA, !!enable,
717 MAC_STATS_IN_CLEAR, clear,
718 MAC_STATS_IN_PERIODIC_CHANGE, change,
719 MAC_STATS_IN_PERIODIC_ENABLE, enable,
720 MAC_STATS_IN_PERIODIC_CLEAR, 0,
721 MAC_STATS_IN_PERIODIC_NOEVENT, 1,
722 MAC_STATS_IN_PERIOD_MS, period);
723 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
724
725 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) {
726 struct efx_ef10_nic_data *nic_data = efx->nic_data;
727
728 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, nic_data->vport_id);
729 }
730
731 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
732 NULL, 0, NULL);
733 /* Expect ENOENT if DMA queues have not been set up */
734 if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues)))
735 efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf),
736 NULL, 0, rc);
737 return rc;
738 }
739
740 void efx_mcdi_mac_start_stats(struct efx_nic *efx)
741 {
742 __le64 *dma_stats = efx->stats_buffer.addr;
743
744 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
745
746 efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0);
747 }
748
749 void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
750 {
751 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0);
752 }
753
754 #define EFX_MAC_STATS_WAIT_US 100
755 #define EFX_MAC_STATS_WAIT_ATTEMPTS 10
756
757 void efx_mcdi_mac_pull_stats(struct efx_nic *efx)
758 {
759 __le64 *dma_stats = efx->stats_buffer.addr;
760 int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS;
761
762 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
763 efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0);
764
765 while (dma_stats[efx->num_mac_stats - 1] ==
766 EFX_MC_STATS_GENERATION_INVALID &&
767 attempts-- != 0)
768 udelay(EFX_MAC_STATS_WAIT_US);
769 }
770
771 int efx_mcdi_port_probe(struct efx_nic *efx)
772 {
773 int rc;
774
775 /* Hook in PHY operations table */
776 efx->phy_op = &efx_mcdi_phy_ops;
777
778 /* Set up MDIO structure for PHY */
779 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
780 efx->mdio.mdio_read = efx_mcdi_mdio_read;
781 efx->mdio.mdio_write = efx_mcdi_mdio_write;
782
783 /* Fill out MDIO structure, loopback modes, and initial link state */
784 rc = efx->phy_op->probe(efx);
785 if (rc != 0)
786 return rc;
787
788 /* Allocate buffer for stats */
789 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
790 efx->num_mac_stats * sizeof(u64), GFP_KERNEL);
791 if (rc)
792 return rc;
793 netif_dbg(efx, probe, efx->net_dev,
794 "stats buffer at %llx (virt %p phys %llx)\n",
795 (u64)efx->stats_buffer.dma_addr,
796 efx->stats_buffer.addr,
797 (u64)virt_to_phys(efx->stats_buffer.addr));
798
799 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 1);
800
801 return 0;
802 }
803
804 void efx_mcdi_port_remove(struct efx_nic *efx)
805 {
806 efx->phy_op->remove(efx);
807 efx_nic_free_buffer(efx, &efx->stats_buffer);
808 }
Linux with added FPC-III support