1 /*
2 * Copyright (c) 2018, Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #include "port.h"
34
35 /* speed in units of 1Mb */
36 static const u32 mlx5e_link_speed[MLX5E_LINK_MODES_NUMBER] = {
37 [MLX5E_1000BASE_CX_SGMII] = 1000,
38 [MLX5E_1000BASE_KX] = 1000,
39 [MLX5E_10GBASE_CX4] = 10000,
40 [MLX5E_10GBASE_KX4] = 10000,
41 [MLX5E_10GBASE_KR] = 10000,
42 [MLX5E_20GBASE_KR2] = 20000,
43 [MLX5E_40GBASE_CR4] = 40000,
44 [MLX5E_40GBASE_KR4] = 40000,
45 [MLX5E_56GBASE_R4] = 56000,
46 [MLX5E_10GBASE_CR] = 10000,
47 [MLX5E_10GBASE_SR] = 10000,
48 [MLX5E_10GBASE_ER] = 10000,
49 [MLX5E_40GBASE_SR4] = 40000,
50 [MLX5E_40GBASE_LR4] = 40000,
51 [MLX5E_50GBASE_SR2] = 50000,
52 [MLX5E_100GBASE_CR4] = 100000,
53 [MLX5E_100GBASE_SR4] = 100000,
54 [MLX5E_100GBASE_KR4] = 100000,
55 [MLX5E_100GBASE_LR4] = 100000,
56 [MLX5E_100BASE_TX] = 100,
57 [MLX5E_1000BASE_T] = 1000,
58 [MLX5E_10GBASE_T] = 10000,
59 [MLX5E_25GBASE_CR] = 25000,
60 [MLX5E_25GBASE_KR] = 25000,
61 [MLX5E_25GBASE_SR] = 25000,
62 [MLX5E_50GBASE_CR2] = 50000,
63 [MLX5E_50GBASE_KR2] = 50000,
64 };
65
66 static const u32 mlx5e_ext_link_speed[MLX5E_EXT_LINK_MODES_NUMBER] = {
67 [MLX5E_SGMII_100M] = 100,
68 [MLX5E_1000BASE_X_SGMII] = 1000,
69 [MLX5E_5GBASE_R] = 5000,
70 [MLX5E_10GBASE_XFI_XAUI_1] = 10000,
71 [MLX5E_40GBASE_XLAUI_4_XLPPI_4] = 40000,
72 [MLX5E_25GAUI_1_25GBASE_CR_KR] = 25000,
73 [MLX5E_50GAUI_2_LAUI_2_50GBASE_CR2_KR2] = 50000,
74 [MLX5E_50GAUI_1_LAUI_1_50GBASE_CR_KR] = 50000,
75 [MLX5E_CAUI_4_100GBASE_CR4_KR4] = 100000,
76 [MLX5E_100GAUI_2_100GBASE_CR2_KR2] = 100000,
77 [MLX5E_200GAUI_4_200GBASE_CR4_KR4] = 200000,
78 [MLX5E_400GAUI_8] = 400000,
79 [MLX5E_100GAUI_1_100GBASE_CR_KR] = 100000,
80 [MLX5E_200GAUI_2_200GBASE_CR2_KR2] = 200000,
81 [MLX5E_400GAUI_4_400GBASE_CR4_KR4] = 400000,
82 };
83
mlx5e_ptys_ext_supported(struct mlx5_core_dev * mdev)84 bool mlx5e_ptys_ext_supported(struct mlx5_core_dev *mdev)
85 {
86 struct mlx5e_port_eth_proto eproto;
87 int err;
88
89 if (MLX5_CAP_PCAM_FEATURE(mdev, ptys_extended_ethernet))
90 return true;
91
92 err = mlx5_port_query_eth_proto(mdev, 1, true, &eproto);
93 if (err)
94 return false;
95
96 return !!eproto.cap;
97 }
98
mlx5e_port_get_speed_arr(struct mlx5_core_dev * mdev,const u32 ** arr,u32 * size,bool force_legacy)99 static void mlx5e_port_get_speed_arr(struct mlx5_core_dev *mdev,
100 const u32 **arr, u32 *size,
101 bool force_legacy)
102 {
103 bool ext = force_legacy ? false : mlx5e_ptys_ext_supported(mdev);
104
105 *size = ext ? ARRAY_SIZE(mlx5e_ext_link_speed) :
106 ARRAY_SIZE(mlx5e_link_speed);
107 *arr = ext ? mlx5e_ext_link_speed : mlx5e_link_speed;
108 }
109
mlx5_port_query_eth_proto(struct mlx5_core_dev * dev,u8 port,bool ext,struct mlx5e_port_eth_proto * eproto)110 int mlx5_port_query_eth_proto(struct mlx5_core_dev *dev, u8 port, bool ext,
111 struct mlx5e_port_eth_proto *eproto)
112 {
113 u32 out[MLX5_ST_SZ_DW(ptys_reg)];
114 int err;
115
116 if (!eproto)
117 return -EINVAL;
118
119 err = mlx5_query_port_ptys(dev, out, sizeof(out), MLX5_PTYS_EN, port);
120 if (err)
121 return err;
122
123 eproto->cap = MLX5_GET_ETH_PROTO(ptys_reg, out, ext,
124 eth_proto_capability);
125 eproto->admin = MLX5_GET_ETH_PROTO(ptys_reg, out, ext, eth_proto_admin);
126 eproto->oper = MLX5_GET_ETH_PROTO(ptys_reg, out, ext, eth_proto_oper);
127 return 0;
128 }
129
mlx5_port_query_eth_autoneg(struct mlx5_core_dev * dev,u8 * an_status,u8 * an_disable_cap,u8 * an_disable_admin)130 void mlx5_port_query_eth_autoneg(struct mlx5_core_dev *dev, u8 *an_status,
131 u8 *an_disable_cap, u8 *an_disable_admin)
132 {
133 u32 out[MLX5_ST_SZ_DW(ptys_reg)];
134
135 *an_status = 0;
136 *an_disable_cap = 0;
137 *an_disable_admin = 0;
138
139 if (mlx5_query_port_ptys(dev, out, sizeof(out), MLX5_PTYS_EN, 1))
140 return;
141
142 *an_status = MLX5_GET(ptys_reg, out, an_status);
143 *an_disable_cap = MLX5_GET(ptys_reg, out, an_disable_cap);
144 *an_disable_admin = MLX5_GET(ptys_reg, out, an_disable_admin);
145 }
146
mlx5_port_set_eth_ptys(struct mlx5_core_dev * dev,bool an_disable,u32 proto_admin,bool ext)147 int mlx5_port_set_eth_ptys(struct mlx5_core_dev *dev, bool an_disable,
148 u32 proto_admin, bool ext)
149 {
150 u32 out[MLX5_ST_SZ_DW(ptys_reg)];
151 u32 in[MLX5_ST_SZ_DW(ptys_reg)];
152 u8 an_disable_admin;
153 u8 an_disable_cap;
154 u8 an_status;
155
156 mlx5_port_query_eth_autoneg(dev, &an_status, &an_disable_cap,
157 &an_disable_admin);
158 if (!an_disable_cap && an_disable)
159 return -EPERM;
160
161 memset(in, 0, sizeof(in));
162
163 MLX5_SET(ptys_reg, in, local_port, 1);
164 MLX5_SET(ptys_reg, in, an_disable_admin, an_disable);
165 MLX5_SET(ptys_reg, in, proto_mask, MLX5_PTYS_EN);
166 if (ext)
167 MLX5_SET(ptys_reg, in, ext_eth_proto_admin, proto_admin);
168 else
169 MLX5_SET(ptys_reg, in, eth_proto_admin, proto_admin);
170
171 return mlx5_core_access_reg(dev, in, sizeof(in), out,
172 sizeof(out), MLX5_REG_PTYS, 0, 1);
173 }
174
mlx5e_port_ptys2speed(struct mlx5_core_dev * mdev,u32 eth_proto_oper,bool force_legacy)175 u32 mlx5e_port_ptys2speed(struct mlx5_core_dev *mdev, u32 eth_proto_oper,
176 bool force_legacy)
177 {
178 unsigned long temp = eth_proto_oper;
179 const u32 *table;
180 u32 speed = 0;
181 u32 max_size;
182 int i;
183
184 mlx5e_port_get_speed_arr(mdev, &table, &max_size, force_legacy);
185 i = find_first_bit(&temp, max_size);
186 if (i < max_size)
187 speed = table[i];
188 return speed;
189 }
190
mlx5e_port_linkspeed(struct mlx5_core_dev * mdev,u32 * speed)191 int mlx5e_port_linkspeed(struct mlx5_core_dev *mdev, u32 *speed)
192 {
193 struct mlx5e_port_eth_proto eproto;
194 bool force_legacy = false;
195 bool ext;
196 int err;
197
198 ext = mlx5e_ptys_ext_supported(mdev);
199 err = mlx5_port_query_eth_proto(mdev, 1, ext, &eproto);
200 if (err)
201 goto out;
202 if (ext && !eproto.admin) {
203 force_legacy = true;
204 err = mlx5_port_query_eth_proto(mdev, 1, false, &eproto);
205 if (err)
206 goto out;
207 }
208 *speed = mlx5e_port_ptys2speed(mdev, eproto.oper, force_legacy);
209 if (!(*speed))
210 err = -EINVAL;
211
212 out:
213 return err;
214 }
215
mlx5e_port_max_linkspeed(struct mlx5_core_dev * mdev,u32 * speed)216 int mlx5e_port_max_linkspeed(struct mlx5_core_dev *mdev, u32 *speed)
217 {
218 struct mlx5e_port_eth_proto eproto;
219 u32 max_speed = 0;
220 const u32 *table;
221 u32 max_size;
222 bool ext;
223 int err;
224 int i;
225
226 ext = mlx5e_ptys_ext_supported(mdev);
227 err = mlx5_port_query_eth_proto(mdev, 1, ext, &eproto);
228 if (err)
229 return err;
230
231 mlx5e_port_get_speed_arr(mdev, &table, &max_size, false);
232 for (i = 0; i < max_size; ++i)
233 if (eproto.cap & MLX5E_PROT_MASK(i))
234 max_speed = max(max_speed, table[i]);
235
236 *speed = max_speed;
237 return 0;
238 }
239
mlx5e_port_speed2linkmodes(struct mlx5_core_dev * mdev,u32 speed,bool force_legacy)240 u32 mlx5e_port_speed2linkmodes(struct mlx5_core_dev *mdev, u32 speed,
241 bool force_legacy)
242 {
243 u32 link_modes = 0;
244 const u32 *table;
245 u32 max_size;
246 int i;
247
248 mlx5e_port_get_speed_arr(mdev, &table, &max_size, force_legacy);
249 for (i = 0; i < max_size; ++i) {
250 if (table[i] == speed)
251 link_modes |= MLX5E_PROT_MASK(i);
252 }
253 return link_modes;
254 }
255
mlx5e_port_query_pbmc(struct mlx5_core_dev * mdev,void * out)256 int mlx5e_port_query_pbmc(struct mlx5_core_dev *mdev, void *out)
257 {
258 int sz = MLX5_ST_SZ_BYTES(pbmc_reg);
259 void *in;
260 int err;
261
262 in = kzalloc(sz, GFP_KERNEL);
263 if (!in)
264 return -ENOMEM;
265
266 MLX5_SET(pbmc_reg, in, local_port, 1);
267 err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PBMC, 0, 0);
268
269 kfree(in);
270 return err;
271 }
272
mlx5e_port_set_pbmc(struct mlx5_core_dev * mdev,void * in)273 int mlx5e_port_set_pbmc(struct mlx5_core_dev *mdev, void *in)
274 {
275 int sz = MLX5_ST_SZ_BYTES(pbmc_reg);
276 void *out;
277 int err;
278
279 out = kzalloc(sz, GFP_KERNEL);
280 if (!out)
281 return -ENOMEM;
282
283 MLX5_SET(pbmc_reg, in, local_port, 1);
284 err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PBMC, 0, 1);
285
286 kfree(out);
287 return err;
288 }
289
290 /* buffer[i]: buffer that priority i mapped to */
mlx5e_port_query_priority2buffer(struct mlx5_core_dev * mdev,u8 * buffer)291 int mlx5e_port_query_priority2buffer(struct mlx5_core_dev *mdev, u8 *buffer)
292 {
293 int sz = MLX5_ST_SZ_BYTES(pptb_reg);
294 u32 prio_x_buff;
295 void *out;
296 void *in;
297 int prio;
298 int err;
299
300 in = kzalloc(sz, GFP_KERNEL);
301 out = kzalloc(sz, GFP_KERNEL);
302 if (!in || !out) {
303 err = -ENOMEM;
304 goto out;
305 }
306
307 MLX5_SET(pptb_reg, in, local_port, 1);
308 err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPTB, 0, 0);
309 if (err)
310 goto out;
311
312 prio_x_buff = MLX5_GET(pptb_reg, out, prio_x_buff);
313 for (prio = 0; prio < 8; prio++) {
314 buffer[prio] = (u8)(prio_x_buff >> (4 * prio)) & 0xF;
315 mlx5_core_dbg(mdev, "prio %d, buffer %d\n", prio, buffer[prio]);
316 }
317 out:
318 kfree(in);
319 kfree(out);
320 return err;
321 }
322
mlx5e_port_set_priority2buffer(struct mlx5_core_dev * mdev,u8 * buffer)323 int mlx5e_port_set_priority2buffer(struct mlx5_core_dev *mdev, u8 *buffer)
324 {
325 int sz = MLX5_ST_SZ_BYTES(pptb_reg);
326 u32 prio_x_buff;
327 void *out;
328 void *in;
329 int prio;
330 int err;
331
332 in = kzalloc(sz, GFP_KERNEL);
333 out = kzalloc(sz, GFP_KERNEL);
334 if (!in || !out) {
335 err = -ENOMEM;
336 goto out;
337 }
338
339 /* First query the pptb register */
340 MLX5_SET(pptb_reg, in, local_port, 1);
341 err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPTB, 0, 0);
342 if (err)
343 goto out;
344
345 memcpy(in, out, sz);
346 MLX5_SET(pptb_reg, in, local_port, 1);
347
348 /* Update the pm and prio_x_buff */
349 MLX5_SET(pptb_reg, in, pm, 0xFF);
350
351 prio_x_buff = 0;
352 for (prio = 0; prio < 8; prio++)
353 prio_x_buff |= (buffer[prio] << (4 * prio));
354 MLX5_SET(pptb_reg, in, prio_x_buff, prio_x_buff);
355
356 err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPTB, 0, 1);
357
358 out:
359 kfree(in);
360 kfree(out);
361 return err;
362 }
363
364 enum mlx5e_fec_supported_link_mode {
365 MLX5E_FEC_SUPPORTED_LINK_MODES_10G_40G,
366 MLX5E_FEC_SUPPORTED_LINK_MODES_25G,
367 MLX5E_FEC_SUPPORTED_LINK_MODES_50G,
368 MLX5E_FEC_SUPPORTED_LINK_MODES_56G,
369 MLX5E_FEC_SUPPORTED_LINK_MODES_100G,
370 MLX5E_FEC_SUPPORTED_LINK_MODE_50G_1X,
371 MLX5E_FEC_SUPPORTED_LINK_MODE_100G_2X,
372 MLX5E_FEC_SUPPORTED_LINK_MODE_200G_4X,
373 MLX5E_FEC_SUPPORTED_LINK_MODE_400G_8X,
374 MLX5E_MAX_FEC_SUPPORTED_LINK_MODE,
375 };
376
377 #define MLX5E_FEC_FIRST_50G_PER_LANE_MODE MLX5E_FEC_SUPPORTED_LINK_MODE_50G_1X
378
379 #define MLX5E_FEC_OVERRIDE_ADMIN_POLICY(buf, policy, write, link) \
380 do { \
381 u16 *_policy = &(policy); \
382 u32 *_buf = buf; \
383 \
384 if (write) \
385 MLX5_SET(pplm_reg, _buf, fec_override_admin_##link, *_policy); \
386 else \
387 *_policy = MLX5_GET(pplm_reg, _buf, fec_override_admin_##link); \
388 } while (0)
389
390 #define MLX5E_FEC_OVERRIDE_ADMIN_50G_POLICY(buf, policy, write, link) \
391 do { \
392 unsigned long policy_long; \
393 u16 *__policy = &(policy); \
394 bool _write = (write); \
395 \
396 policy_long = *__policy; \
397 if (_write && *__policy) \
398 *__policy = find_first_bit(&policy_long, \
399 sizeof(policy_long) * BITS_PER_BYTE);\
400 MLX5E_FEC_OVERRIDE_ADMIN_POLICY(buf, *__policy, _write, link); \
401 if (!_write && *__policy) \
402 *__policy = 1 << *__policy; \
403 } while (0)
404
405 /* get/set FEC admin field for a given speed */
mlx5e_fec_admin_field(u32 * pplm,u16 * fec_policy,bool write,enum mlx5e_fec_supported_link_mode link_mode)406 static int mlx5e_fec_admin_field(u32 *pplm, u16 *fec_policy, bool write,
407 enum mlx5e_fec_supported_link_mode link_mode)
408 {
409 switch (link_mode) {
410 case MLX5E_FEC_SUPPORTED_LINK_MODES_10G_40G:
411 MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 10g_40g);
412 break;
413 case MLX5E_FEC_SUPPORTED_LINK_MODES_25G:
414 MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 25g);
415 break;
416 case MLX5E_FEC_SUPPORTED_LINK_MODES_50G:
417 MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 50g);
418 break;
419 case MLX5E_FEC_SUPPORTED_LINK_MODES_56G:
420 MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 56g);
421 break;
422 case MLX5E_FEC_SUPPORTED_LINK_MODES_100G:
423 MLX5E_FEC_OVERRIDE_ADMIN_POLICY(pplm, *fec_policy, write, 100g);
424 break;
425 case MLX5E_FEC_SUPPORTED_LINK_MODE_50G_1X:
426 MLX5E_FEC_OVERRIDE_ADMIN_50G_POLICY(pplm, *fec_policy, write, 50g_1x);
427 break;
428 case MLX5E_FEC_SUPPORTED_LINK_MODE_100G_2X:
429 MLX5E_FEC_OVERRIDE_ADMIN_50G_POLICY(pplm, *fec_policy, write, 100g_2x);
430 break;
431 case MLX5E_FEC_SUPPORTED_LINK_MODE_200G_4X:
432 MLX5E_FEC_OVERRIDE_ADMIN_50G_POLICY(pplm, *fec_policy, write, 200g_4x);
433 break;
434 case MLX5E_FEC_SUPPORTED_LINK_MODE_400G_8X:
435 MLX5E_FEC_OVERRIDE_ADMIN_50G_POLICY(pplm, *fec_policy, write, 400g_8x);
436 break;
437 default:
438 return -EINVAL;
439 }
440 return 0;
441 }
442
443 #define MLX5E_GET_FEC_OVERRIDE_CAP(buf, link) \
444 MLX5_GET(pplm_reg, buf, fec_override_cap_##link)
445
446 /* returns FEC capabilities for a given speed */
mlx5e_get_fec_cap_field(u32 * pplm,u16 * fec_cap,enum mlx5e_fec_supported_link_mode link_mode)447 static int mlx5e_get_fec_cap_field(u32 *pplm, u16 *fec_cap,
448 enum mlx5e_fec_supported_link_mode link_mode)
449 {
450 switch (link_mode) {
451 case MLX5E_FEC_SUPPORTED_LINK_MODES_10G_40G:
452 *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 10g_40g);
453 break;
454 case MLX5E_FEC_SUPPORTED_LINK_MODES_25G:
455 *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 25g);
456 break;
457 case MLX5E_FEC_SUPPORTED_LINK_MODES_50G:
458 *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 50g);
459 break;
460 case MLX5E_FEC_SUPPORTED_LINK_MODES_56G:
461 *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 56g);
462 break;
463 case MLX5E_FEC_SUPPORTED_LINK_MODES_100G:
464 *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 100g);
465 break;
466 case MLX5E_FEC_SUPPORTED_LINK_MODE_50G_1X:
467 *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 50g_1x);
468 break;
469 case MLX5E_FEC_SUPPORTED_LINK_MODE_100G_2X:
470 *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 100g_2x);
471 break;
472 case MLX5E_FEC_SUPPORTED_LINK_MODE_200G_4X:
473 *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 200g_4x);
474 break;
475 case MLX5E_FEC_SUPPORTED_LINK_MODE_400G_8X:
476 *fec_cap = MLX5E_GET_FEC_OVERRIDE_CAP(pplm, 400g_8x);
477 break;
478 default:
479 return -EINVAL;
480 }
481 return 0;
482 }
483
mlx5e_fec_in_caps(struct mlx5_core_dev * dev,int fec_policy)484 bool mlx5e_fec_in_caps(struct mlx5_core_dev *dev, int fec_policy)
485 {
486 bool fec_50g_per_lane = MLX5_CAP_PCAM_FEATURE(dev, fec_50G_per_lane_in_pplm);
487 u32 out[MLX5_ST_SZ_DW(pplm_reg)] = {};
488 u32 in[MLX5_ST_SZ_DW(pplm_reg)] = {};
489 int sz = MLX5_ST_SZ_BYTES(pplm_reg);
490 int err;
491 int i;
492
493 if (!MLX5_CAP_GEN(dev, pcam_reg) || !MLX5_CAP_PCAM_REG(dev, pplm))
494 return false;
495
496 MLX5_SET(pplm_reg, in, local_port, 1);
497 err = mlx5_core_access_reg(dev, in, sz, out, sz, MLX5_REG_PPLM, 0, 0);
498 if (err)
499 return false;
500
501 for (i = 0; i < MLX5E_MAX_FEC_SUPPORTED_LINK_MODE; i++) {
502 u16 fec_caps;
503
504 if (i >= MLX5E_FEC_FIRST_50G_PER_LANE_MODE && !fec_50g_per_lane)
505 break;
506
507 mlx5e_get_fec_cap_field(out, &fec_caps, i);
508 if (fec_caps & fec_policy)
509 return true;
510 }
511 return false;
512 }
513
mlx5e_get_fec_mode(struct mlx5_core_dev * dev,u32 * fec_mode_active,u16 * fec_configured_mode)514 int mlx5e_get_fec_mode(struct mlx5_core_dev *dev, u32 *fec_mode_active,
515 u16 *fec_configured_mode)
516 {
517 bool fec_50g_per_lane = MLX5_CAP_PCAM_FEATURE(dev, fec_50G_per_lane_in_pplm);
518 u32 out[MLX5_ST_SZ_DW(pplm_reg)] = {};
519 u32 in[MLX5_ST_SZ_DW(pplm_reg)] = {};
520 int sz = MLX5_ST_SZ_BYTES(pplm_reg);
521 int err;
522 int i;
523
524 if (!MLX5_CAP_GEN(dev, pcam_reg))
525 return -EOPNOTSUPP;
526
527 if (!MLX5_CAP_PCAM_REG(dev, pplm))
528 return -EOPNOTSUPP;
529
530 MLX5_SET(pplm_reg, in, local_port, 1);
531 err = mlx5_core_access_reg(dev, in, sz, out, sz, MLX5_REG_PPLM, 0, 0);
532 if (err)
533 return err;
534
535 *fec_mode_active = MLX5_GET(pplm_reg, out, fec_mode_active);
536
537 if (!fec_configured_mode)
538 goto out;
539
540 *fec_configured_mode = 0;
541 for (i = 0; i < MLX5E_MAX_FEC_SUPPORTED_LINK_MODE; i++) {
542 if (i >= MLX5E_FEC_FIRST_50G_PER_LANE_MODE && !fec_50g_per_lane)
543 break;
544
545 mlx5e_fec_admin_field(out, fec_configured_mode, 0, i);
546 if (*fec_configured_mode != 0)
547 goto out;
548 }
549 out:
550 return 0;
551 }
552
mlx5e_set_fec_mode(struct mlx5_core_dev * dev,u16 fec_policy)553 int mlx5e_set_fec_mode(struct mlx5_core_dev *dev, u16 fec_policy)
554 {
555 bool fec_50g_per_lane = MLX5_CAP_PCAM_FEATURE(dev, fec_50G_per_lane_in_pplm);
556 u32 out[MLX5_ST_SZ_DW(pplm_reg)] = {};
557 u32 in[MLX5_ST_SZ_DW(pplm_reg)] = {};
558 int sz = MLX5_ST_SZ_BYTES(pplm_reg);
559 u16 fec_policy_auto = 0;
560 int err;
561 int i;
562
563 if (!MLX5_CAP_GEN(dev, pcam_reg))
564 return -EOPNOTSUPP;
565
566 if (!MLX5_CAP_PCAM_REG(dev, pplm))
567 return -EOPNOTSUPP;
568
569 if (fec_policy >= (1 << MLX5E_FEC_LLRS_272_257_1) && !fec_50g_per_lane)
570 return -EOPNOTSUPP;
571
572 if (fec_policy && !mlx5e_fec_in_caps(dev, fec_policy))
573 return -EOPNOTSUPP;
574
575 MLX5_SET(pplm_reg, in, local_port, 1);
576 err = mlx5_core_access_reg(dev, in, sz, out, sz, MLX5_REG_PPLM, 0, 0);
577 if (err)
578 return err;
579
580 MLX5_SET(pplm_reg, out, local_port, 1);
581
582 for (i = 0; i < MLX5E_MAX_FEC_SUPPORTED_LINK_MODE; i++) {
583 u16 conf_fec = fec_policy;
584 u16 fec_caps = 0;
585
586 if (i >= MLX5E_FEC_FIRST_50G_PER_LANE_MODE && !fec_50g_per_lane)
587 break;
588
589 /* RS fec in ethtool is mapped to MLX5E_FEC_RS_528_514
590 * to link modes up to 25G per lane and to
591 * MLX5E_FEC_RS_544_514 in the new link modes based on
592 * 50 G per lane
593 */
594 if (conf_fec == (1 << MLX5E_FEC_RS_528_514) &&
595 i >= MLX5E_FEC_FIRST_50G_PER_LANE_MODE)
596 conf_fec = (1 << MLX5E_FEC_RS_544_514);
597
598 mlx5e_get_fec_cap_field(out, &fec_caps, i);
599
600 /* policy supported for link speed */
601 if (fec_caps & conf_fec)
602 mlx5e_fec_admin_field(out, &conf_fec, 1, i);
603 else
604 /* set FEC to auto*/
605 mlx5e_fec_admin_field(out, &fec_policy_auto, 1, i);
606 }
607
608 return mlx5_core_access_reg(dev, out, sz, out, sz, MLX5_REG_PPLM, 0, 1);
609 }
610
