1 // SPDX-License-Identifier: GPL-2.0
2 /* Marvell OcteonTx2 CGX driver
3 *
4 * Copyright (C) 2018 Marvell.
5 *
6 */
7
8 #include <linux/acpi.h>
9 #include <linux/module.h>
10 #include <linux/interrupt.h>
11 #include <linux/pci.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/ethtool.h>
15 #include <linux/phy.h>
16 #include <linux/of.h>
17 #include <linux/of_mdio.h>
18 #include <linux/of_net.h>
19
20 #include "cgx.h"
21 #include "rvu.h"
22 #include "lmac_common.h"
23
24 #define DRV_NAME "Marvell-CGX/RPM"
25 #define DRV_STRING "Marvell CGX/RPM Driver"
26
27 static LIST_HEAD(cgx_list);
28
29 /* Convert firmware speed encoding to user format(Mbps) */
30 static const u32 cgx_speed_mbps[CGX_LINK_SPEED_MAX] = {
31 [CGX_LINK_NONE] = 0,
32 [CGX_LINK_10M] = 10,
33 [CGX_LINK_100M] = 100,
34 [CGX_LINK_1G] = 1000,
35 [CGX_LINK_2HG] = 2500,
36 [CGX_LINK_5G] = 5000,
37 [CGX_LINK_10G] = 10000,
38 [CGX_LINK_20G] = 20000,
39 [CGX_LINK_25G] = 25000,
40 [CGX_LINK_40G] = 40000,
41 [CGX_LINK_50G] = 50000,
42 [CGX_LINK_80G] = 80000,
43 [CGX_LINK_100G] = 100000,
44 };
45
46 /* Convert firmware lmac type encoding to string */
47 static const char *cgx_lmactype_string[LMAC_MODE_MAX] = {
48 [LMAC_MODE_SGMII] = "SGMII",
49 [LMAC_MODE_XAUI] = "XAUI",
50 [LMAC_MODE_RXAUI] = "RXAUI",
51 [LMAC_MODE_10G_R] = "10G_R",
52 [LMAC_MODE_40G_R] = "40G_R",
53 [LMAC_MODE_QSGMII] = "QSGMII",
54 [LMAC_MODE_25G_R] = "25G_R",
55 [LMAC_MODE_50G_R] = "50G_R",
56 [LMAC_MODE_100G_R] = "100G_R",
57 [LMAC_MODE_USXGMII] = "USXGMII",
58 [LMAC_MODE_USGMII] = "USGMII",
59 };
60
61 /* CGX PHY management internal APIs */
62 static int cgx_fwi_link_change(struct cgx *cgx, int lmac_id, bool en);
63
64 /* Supported devices */
65 static const struct pci_device_id cgx_id_table[] = {
66 { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_CGX) },
67 { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_CN10K_RPM) },
68 { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_CN10KB_RPM) },
69 { 0, } /* end of table */
70 };
71
72 MODULE_DEVICE_TABLE(pci, cgx_id_table);
73
is_dev_rpm(void * cgxd)74 static bool is_dev_rpm(void *cgxd)
75 {
76 struct cgx *cgx = cgxd;
77
78 return (cgx->pdev->device == PCI_DEVID_CN10K_RPM) ||
79 (cgx->pdev->device == PCI_DEVID_CN10KB_RPM);
80 }
81
is_lmac_valid(struct cgx * cgx,int lmac_id)82 bool is_lmac_valid(struct cgx *cgx, int lmac_id)
83 {
84 if (!cgx || lmac_id < 0 || lmac_id >= cgx->max_lmac_per_mac)
85 return false;
86 return test_bit(lmac_id, &cgx->lmac_bmap);
87 }
88
89 /* Helper function to get sequential index
90 * given the enabled LMAC of a CGX
91 */
get_sequence_id_of_lmac(struct cgx * cgx,int lmac_id)92 static int get_sequence_id_of_lmac(struct cgx *cgx, int lmac_id)
93 {
94 int tmp, id = 0;
95
96 for_each_set_bit(tmp, &cgx->lmac_bmap, cgx->max_lmac_per_mac) {
97 if (tmp == lmac_id)
98 break;
99 id++;
100 }
101
102 return id;
103 }
104
get_mac_ops(void * cgxd)105 struct mac_ops *get_mac_ops(void *cgxd)
106 {
107 if (!cgxd)
108 return cgxd;
109
110 return ((struct cgx *)cgxd)->mac_ops;
111 }
112
cgx_write(struct cgx * cgx,u64 lmac,u64 offset,u64 val)113 void cgx_write(struct cgx *cgx, u64 lmac, u64 offset, u64 val)
114 {
115 writeq(val, cgx->reg_base + (lmac << cgx->mac_ops->lmac_offset) +
116 offset);
117 }
118
cgx_read(struct cgx * cgx,u64 lmac,u64 offset)119 u64 cgx_read(struct cgx *cgx, u64 lmac, u64 offset)
120 {
121 return readq(cgx->reg_base + (lmac << cgx->mac_ops->lmac_offset) +
122 offset);
123 }
124
lmac_pdata(u8 lmac_id,struct cgx * cgx)125 struct lmac *lmac_pdata(u8 lmac_id, struct cgx *cgx)
126 {
127 if (!cgx || lmac_id >= cgx->max_lmac_per_mac)
128 return NULL;
129
130 return cgx->lmac_idmap[lmac_id];
131 }
132
cgx_get_cgxcnt_max(void)133 int cgx_get_cgxcnt_max(void)
134 {
135 struct cgx *cgx_dev;
136 int idmax = -ENODEV;
137
138 list_for_each_entry(cgx_dev, &cgx_list, cgx_list)
139 if (cgx_dev->cgx_id > idmax)
140 idmax = cgx_dev->cgx_id;
141
142 if (idmax < 0)
143 return 0;
144
145 return idmax + 1;
146 }
147
cgx_get_lmac_cnt(void * cgxd)148 int cgx_get_lmac_cnt(void *cgxd)
149 {
150 struct cgx *cgx = cgxd;
151
152 if (!cgx)
153 return -ENODEV;
154
155 return cgx->lmac_count;
156 }
157
cgx_get_pdata(int cgx_id)158 void *cgx_get_pdata(int cgx_id)
159 {
160 struct cgx *cgx_dev;
161
162 list_for_each_entry(cgx_dev, &cgx_list, cgx_list) {
163 if (cgx_dev->cgx_id == cgx_id)
164 return cgx_dev;
165 }
166 return NULL;
167 }
168
cgx_lmac_write(int cgx_id,int lmac_id,u64 offset,u64 val)169 void cgx_lmac_write(int cgx_id, int lmac_id, u64 offset, u64 val)
170 {
171 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
172
173 /* Software must not access disabled LMAC registers */
174 if (!is_lmac_valid(cgx_dev, lmac_id))
175 return;
176 cgx_write(cgx_dev, lmac_id, offset, val);
177 }
178
cgx_lmac_read(int cgx_id,int lmac_id,u64 offset)179 u64 cgx_lmac_read(int cgx_id, int lmac_id, u64 offset)
180 {
181 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
182
183 /* Software must not access disabled LMAC registers */
184 if (!is_lmac_valid(cgx_dev, lmac_id))
185 return 0;
186
187 return cgx_read(cgx_dev, lmac_id, offset);
188 }
189
cgx_get_cgxid(void * cgxd)190 int cgx_get_cgxid(void *cgxd)
191 {
192 struct cgx *cgx = cgxd;
193
194 if (!cgx)
195 return -EINVAL;
196
197 return cgx->cgx_id;
198 }
199
cgx_lmac_get_p2x(int cgx_id,int lmac_id)200 u8 cgx_lmac_get_p2x(int cgx_id, int lmac_id)
201 {
202 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
203 u64 cfg;
204
205 cfg = cgx_read(cgx_dev, lmac_id, CGXX_CMRX_CFG);
206
207 return (cfg & CMR_P2X_SEL_MASK) >> CMR_P2X_SEL_SHIFT;
208 }
209
210 /* Ensure the required lock for event queue(where asynchronous events are
211 * posted) is acquired before calling this API. Else an asynchronous event(with
212 * latest link status) can reach the destination before this function returns
213 * and could make the link status appear wrong.
214 */
cgx_get_link_info(void * cgxd,int lmac_id,struct cgx_link_user_info * linfo)215 int cgx_get_link_info(void *cgxd, int lmac_id,
216 struct cgx_link_user_info *linfo)
217 {
218 struct lmac *lmac = lmac_pdata(lmac_id, cgxd);
219
220 if (!lmac)
221 return -ENODEV;
222
223 *linfo = lmac->link_info;
224 return 0;
225 }
226
cgx_lmac_addr_set(u8 cgx_id,u8 lmac_id,u8 * mac_addr)227 int cgx_lmac_addr_set(u8 cgx_id, u8 lmac_id, u8 *mac_addr)
228 {
229 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
230 struct lmac *lmac = lmac_pdata(lmac_id, cgx_dev);
231 struct mac_ops *mac_ops;
232 int index, id;
233 u64 cfg;
234
235 if (!lmac)
236 return -ENODEV;
237
238 /* access mac_ops to know csr_offset */
239 mac_ops = cgx_dev->mac_ops;
240
241 /* copy 6bytes from macaddr */
242 /* memcpy(&cfg, mac_addr, 6); */
243
244 cfg = ether_addr_to_u64(mac_addr);
245
246 id = get_sequence_id_of_lmac(cgx_dev, lmac_id);
247
248 index = id * lmac->mac_to_index_bmap.max;
249
250 cgx_write(cgx_dev, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (index * 0x8)),
251 cfg | CGX_DMAC_CAM_ADDR_ENABLE | ((u64)lmac_id << 49));
252
253 cfg = cgx_read(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
254 cfg |= (CGX_DMAC_CTL0_CAM_ENABLE | CGX_DMAC_BCAST_MODE |
255 CGX_DMAC_MCAST_MODE);
256 cgx_write(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg);
257
258 return 0;
259 }
260
cgx_read_dmac_ctrl(void * cgxd,int lmac_id)261 u64 cgx_read_dmac_ctrl(void *cgxd, int lmac_id)
262 {
263 struct mac_ops *mac_ops;
264 struct cgx *cgx = cgxd;
265
266 if (!cgxd || !is_lmac_valid(cgxd, lmac_id))
267 return 0;
268
269 cgx = cgxd;
270 /* Get mac_ops to know csr offset */
271 mac_ops = cgx->mac_ops;
272
273 return cgx_read(cgxd, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
274 }
275
cgx_read_dmac_entry(void * cgxd,int index)276 u64 cgx_read_dmac_entry(void *cgxd, int index)
277 {
278 struct mac_ops *mac_ops;
279 struct cgx *cgx;
280
281 if (!cgxd)
282 return 0;
283
284 cgx = cgxd;
285 mac_ops = cgx->mac_ops;
286 return cgx_read(cgx, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (index * 8)));
287 }
288
cgx_lmac_addr_add(u8 cgx_id,u8 lmac_id,u8 * mac_addr)289 int cgx_lmac_addr_add(u8 cgx_id, u8 lmac_id, u8 *mac_addr)
290 {
291 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
292 struct lmac *lmac = lmac_pdata(lmac_id, cgx_dev);
293 struct mac_ops *mac_ops;
294 int index, idx;
295 u64 cfg = 0;
296 int id;
297
298 if (!lmac)
299 return -ENODEV;
300
301 mac_ops = cgx_dev->mac_ops;
302 /* Get available index where entry is to be installed */
303 idx = rvu_alloc_rsrc(&lmac->mac_to_index_bmap);
304 if (idx < 0)
305 return idx;
306
307 id = get_sequence_id_of_lmac(cgx_dev, lmac_id);
308
309 index = id * lmac->mac_to_index_bmap.max + idx;
310
311 cfg = ether_addr_to_u64(mac_addr);
312 cfg |= CGX_DMAC_CAM_ADDR_ENABLE;
313 cfg |= ((u64)lmac_id << 49);
314 cgx_write(cgx_dev, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (index * 0x8)), cfg);
315
316 cfg = cgx_read(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
317 cfg |= (CGX_DMAC_BCAST_MODE | CGX_DMAC_CAM_ACCEPT);
318
319 if (is_multicast_ether_addr(mac_addr)) {
320 cfg &= ~GENMASK_ULL(2, 1);
321 cfg |= CGX_DMAC_MCAST_MODE_CAM;
322 lmac->mcast_filters_count++;
323 } else if (!lmac->mcast_filters_count) {
324 cfg |= CGX_DMAC_MCAST_MODE;
325 }
326
327 cgx_write(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg);
328
329 return idx;
330 }
331
cgx_lmac_addr_reset(u8 cgx_id,u8 lmac_id)332 int cgx_lmac_addr_reset(u8 cgx_id, u8 lmac_id)
333 {
334 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
335 struct lmac *lmac = lmac_pdata(lmac_id, cgx_dev);
336 struct mac_ops *mac_ops;
337 u8 index = 0, id;
338 u64 cfg;
339
340 if (!lmac)
341 return -ENODEV;
342
343 mac_ops = cgx_dev->mac_ops;
344 /* Restore index 0 to its default init value as done during
345 * cgx_lmac_init
346 */
347 set_bit(0, lmac->mac_to_index_bmap.bmap);
348
349 id = get_sequence_id_of_lmac(cgx_dev, lmac_id);
350
351 index = id * lmac->mac_to_index_bmap.max + index;
352 cgx_write(cgx_dev, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (index * 0x8)), 0);
353
354 /* Reset CGXX_CMRX_RX_DMAC_CTL0 register to default state */
355 cfg = cgx_read(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
356 cfg &= ~CGX_DMAC_CAM_ACCEPT;
357 cfg |= (CGX_DMAC_BCAST_MODE | CGX_DMAC_MCAST_MODE);
358 cgx_write(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg);
359
360 return 0;
361 }
362
363 /* Allows caller to change macaddress associated with index
364 * in dmac filter table including index 0 reserved for
365 * interface mac address
366 */
cgx_lmac_addr_update(u8 cgx_id,u8 lmac_id,u8 * mac_addr,u8 index)367 int cgx_lmac_addr_update(u8 cgx_id, u8 lmac_id, u8 *mac_addr, u8 index)
368 {
369 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
370 struct mac_ops *mac_ops;
371 struct lmac *lmac;
372 u64 cfg;
373 int id;
374
375 lmac = lmac_pdata(lmac_id, cgx_dev);
376 if (!lmac)
377 return -ENODEV;
378
379 mac_ops = cgx_dev->mac_ops;
380 /* Validate the index */
381 if (index >= lmac->mac_to_index_bmap.max)
382 return -EINVAL;
383
384 /* ensure index is already set */
385 if (!test_bit(index, lmac->mac_to_index_bmap.bmap))
386 return -EINVAL;
387
388 id = get_sequence_id_of_lmac(cgx_dev, lmac_id);
389
390 index = id * lmac->mac_to_index_bmap.max + index;
391
392 cfg = cgx_read(cgx_dev, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (index * 0x8)));
393 cfg &= ~CGX_RX_DMAC_ADR_MASK;
394 cfg |= ether_addr_to_u64(mac_addr);
395
396 cgx_write(cgx_dev, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (index * 0x8)), cfg);
397 return 0;
398 }
399
cgx_lmac_addr_del(u8 cgx_id,u8 lmac_id,u8 index)400 int cgx_lmac_addr_del(u8 cgx_id, u8 lmac_id, u8 index)
401 {
402 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
403 struct lmac *lmac = lmac_pdata(lmac_id, cgx_dev);
404 struct mac_ops *mac_ops;
405 u8 mac[ETH_ALEN];
406 u64 cfg;
407 int id;
408
409 if (!lmac)
410 return -ENODEV;
411
412 mac_ops = cgx_dev->mac_ops;
413 /* Validate the index */
414 if (index >= lmac->mac_to_index_bmap.max)
415 return -EINVAL;
416
417 /* Skip deletion for reserved index i.e. index 0 */
418 if (index == 0)
419 return 0;
420
421 rvu_free_rsrc(&lmac->mac_to_index_bmap, index);
422
423 id = get_sequence_id_of_lmac(cgx_dev, lmac_id);
424
425 index = id * lmac->mac_to_index_bmap.max + index;
426
427 /* Read MAC address to check whether it is ucast or mcast */
428 cfg = cgx_read(cgx_dev, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (index * 0x8)));
429
430 u64_to_ether_addr(cfg, mac);
431 if (is_multicast_ether_addr(mac))
432 lmac->mcast_filters_count--;
433
434 if (!lmac->mcast_filters_count) {
435 cfg = cgx_read(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
436 cfg &= ~GENMASK_ULL(2, 1);
437 cfg |= CGX_DMAC_MCAST_MODE;
438 cgx_write(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg);
439 }
440
441 cgx_write(cgx_dev, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (index * 0x8)), 0);
442
443 return 0;
444 }
445
cgx_lmac_addr_max_entries_get(u8 cgx_id,u8 lmac_id)446 int cgx_lmac_addr_max_entries_get(u8 cgx_id, u8 lmac_id)
447 {
448 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
449 struct lmac *lmac = lmac_pdata(lmac_id, cgx_dev);
450
451 if (lmac)
452 return lmac->mac_to_index_bmap.max;
453
454 return 0;
455 }
456
cgx_lmac_addr_get(u8 cgx_id,u8 lmac_id)457 u64 cgx_lmac_addr_get(u8 cgx_id, u8 lmac_id)
458 {
459 struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
460 struct lmac *lmac = lmac_pdata(lmac_id, cgx_dev);
461 struct mac_ops *mac_ops;
462 int index;
463 u64 cfg;
464 int id;
465
466 mac_ops = cgx_dev->mac_ops;
467
468 id = get_sequence_id_of_lmac(cgx_dev, lmac_id);
469
470 index = id * lmac->mac_to_index_bmap.max;
471
472 cfg = cgx_read(cgx_dev, 0, CGXX_CMRX_RX_DMAC_CAM0 + index * 0x8);
473 return cfg & CGX_RX_DMAC_ADR_MASK;
474 }
475
cgx_set_pkind(void * cgxd,u8 lmac_id,int pkind)476 int cgx_set_pkind(void *cgxd, u8 lmac_id, int pkind)
477 {
478 struct cgx *cgx = cgxd;
479
480 if (!is_lmac_valid(cgx, lmac_id))
481 return -ENODEV;
482
483 cgx_write(cgx, lmac_id, cgx->mac_ops->rxid_map_offset, (pkind & 0x3F));
484 return 0;
485 }
486
cgx_get_lmac_type(void * cgxd,int lmac_id)487 static u8 cgx_get_lmac_type(void *cgxd, int lmac_id)
488 {
489 struct cgx *cgx = cgxd;
490 u64 cfg;
491
492 cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_CFG);
493 return (cfg >> CGX_LMAC_TYPE_SHIFT) & CGX_LMAC_TYPE_MASK;
494 }
495
cgx_get_lmac_fifo_len(void * cgxd,int lmac_id)496 static u32 cgx_get_lmac_fifo_len(void *cgxd, int lmac_id)
497 {
498 struct cgx *cgx = cgxd;
499 u8 num_lmacs;
500 u32 fifo_len;
501
502 fifo_len = cgx->mac_ops->fifo_len;
503 num_lmacs = cgx->mac_ops->get_nr_lmacs(cgx);
504
505 switch (num_lmacs) {
506 case 1:
507 return fifo_len;
508 case 2:
509 return fifo_len / 2;
510 case 3:
511 /* LMAC0 gets half of the FIFO, reset 1/4th */
512 if (lmac_id == 0)
513 return fifo_len / 2;
514 return fifo_len / 4;
515 case 4:
516 default:
517 return fifo_len / 4;
518 }
519 return 0;
520 }
521
522 /* Configure CGX LMAC in internal loopback mode */
cgx_lmac_internal_loopback(void * cgxd,int lmac_id,bool enable)523 int cgx_lmac_internal_loopback(void *cgxd, int lmac_id, bool enable)
524 {
525 struct cgx *cgx = cgxd;
526 struct lmac *lmac;
527 u64 cfg;
528
529 if (!is_lmac_valid(cgx, lmac_id))
530 return -ENODEV;
531
532 lmac = lmac_pdata(lmac_id, cgx);
533 if (lmac->lmac_type == LMAC_MODE_SGMII ||
534 lmac->lmac_type == LMAC_MODE_QSGMII) {
535 cfg = cgx_read(cgx, lmac_id, CGXX_GMP_PCS_MRX_CTL);
536 if (enable)
537 cfg |= CGXX_GMP_PCS_MRX_CTL_LBK;
538 else
539 cfg &= ~CGXX_GMP_PCS_MRX_CTL_LBK;
540 cgx_write(cgx, lmac_id, CGXX_GMP_PCS_MRX_CTL, cfg);
541 } else {
542 cfg = cgx_read(cgx, lmac_id, CGXX_SPUX_CONTROL1);
543 if (enable)
544 cfg |= CGXX_SPUX_CONTROL1_LBK;
545 else
546 cfg &= ~CGXX_SPUX_CONTROL1_LBK;
547 cgx_write(cgx, lmac_id, CGXX_SPUX_CONTROL1, cfg);
548 }
549 return 0;
550 }
551
cgx_lmac_promisc_config(int cgx_id,int lmac_id,bool enable)552 void cgx_lmac_promisc_config(int cgx_id, int lmac_id, bool enable)
553 {
554 struct cgx *cgx = cgx_get_pdata(cgx_id);
555 struct lmac *lmac = lmac_pdata(lmac_id, cgx);
556 struct mac_ops *mac_ops;
557 u16 max_dmac;
558 int index, i;
559 u64 cfg = 0;
560 int id;
561
562 if (!cgx || !lmac)
563 return;
564
565 max_dmac = lmac->mac_to_index_bmap.max;
566 id = get_sequence_id_of_lmac(cgx, lmac_id);
567
568 mac_ops = cgx->mac_ops;
569 if (enable) {
570 /* Enable promiscuous mode on LMAC */
571 cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
572 cfg &= ~CGX_DMAC_CAM_ACCEPT;
573 cfg |= (CGX_DMAC_BCAST_MODE | CGX_DMAC_MCAST_MODE);
574 cgx_write(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg);
575
576 for (i = 0; i < max_dmac; i++) {
577 index = id * max_dmac + i;
578 cfg = cgx_read(cgx, 0,
579 (CGXX_CMRX_RX_DMAC_CAM0 + index * 0x8));
580 cfg &= ~CGX_DMAC_CAM_ADDR_ENABLE;
581 cgx_write(cgx, 0,
582 (CGXX_CMRX_RX_DMAC_CAM0 + index * 0x8), cfg);
583 }
584 } else {
585 /* Disable promiscuous mode */
586 cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
587 cfg |= CGX_DMAC_CAM_ACCEPT | CGX_DMAC_MCAST_MODE;
588 cgx_write(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg);
589 for (i = 0; i < max_dmac; i++) {
590 index = id * max_dmac + i;
591 cfg = cgx_read(cgx, 0,
592 (CGXX_CMRX_RX_DMAC_CAM0 + index * 0x8));
593 if ((cfg & CGX_RX_DMAC_ADR_MASK) != 0) {
594 cfg |= CGX_DMAC_CAM_ADDR_ENABLE;
595 cgx_write(cgx, 0,
596 (CGXX_CMRX_RX_DMAC_CAM0 +
597 index * 0x8),
598 cfg);
599 }
600 }
601 }
602 }
603
cgx_lmac_get_pause_frm_status(void * cgxd,int lmac_id,u8 * tx_pause,u8 * rx_pause)604 static int cgx_lmac_get_pause_frm_status(void *cgxd, int lmac_id,
605 u8 *tx_pause, u8 *rx_pause)
606 {
607 struct cgx *cgx = cgxd;
608 u64 cfg;
609
610 if (is_dev_rpm(cgx))
611 return 0;
612
613 if (!is_lmac_valid(cgx, lmac_id))
614 return -ENODEV;
615
616 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL);
617 *rx_pause = !!(cfg & CGX_SMUX_RX_FRM_CTL_CTL_BCK);
618
619 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_TX_CTL);
620 *tx_pause = !!(cfg & CGX_SMUX_TX_CTL_L2P_BP_CONV);
621 return 0;
622 }
623
624 /* Enable or disable forwarding received pause frames to Tx block */
cgx_lmac_enadis_rx_pause_fwding(void * cgxd,int lmac_id,bool enable)625 void cgx_lmac_enadis_rx_pause_fwding(void *cgxd, int lmac_id, bool enable)
626 {
627 struct cgx *cgx = cgxd;
628 u8 rx_pause, tx_pause;
629 bool is_pfc_enabled;
630 struct lmac *lmac;
631 u64 cfg;
632
633 if (!cgx)
634 return;
635
636 lmac = lmac_pdata(lmac_id, cgx);
637 if (!lmac)
638 return;
639
640 /* Pause frames are not enabled just return */
641 if (!bitmap_weight(lmac->rx_fc_pfvf_bmap.bmap, lmac->rx_fc_pfvf_bmap.max))
642 return;
643
644 cgx_lmac_get_pause_frm_status(cgx, lmac_id, &rx_pause, &tx_pause);
645 is_pfc_enabled = rx_pause ? false : true;
646
647 if (enable) {
648 if (!is_pfc_enabled) {
649 cfg = cgx_read(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL);
650 cfg |= CGX_GMP_GMI_RXX_FRM_CTL_CTL_BCK;
651 cgx_write(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL, cfg);
652
653 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL);
654 cfg |= CGX_SMUX_RX_FRM_CTL_CTL_BCK;
655 cgx_write(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL, cfg);
656 } else {
657 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_CBFC_CTL);
658 cfg |= CGXX_SMUX_CBFC_CTL_BCK_EN;
659 cgx_write(cgx, lmac_id, CGXX_SMUX_CBFC_CTL, cfg);
660 }
661 } else {
662
663 if (!is_pfc_enabled) {
664 cfg = cgx_read(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL);
665 cfg &= ~CGX_GMP_GMI_RXX_FRM_CTL_CTL_BCK;
666 cgx_write(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL, cfg);
667
668 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL);
669 cfg &= ~CGX_SMUX_RX_FRM_CTL_CTL_BCK;
670 cgx_write(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL, cfg);
671 } else {
672 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_CBFC_CTL);
673 cfg &= ~CGXX_SMUX_CBFC_CTL_BCK_EN;
674 cgx_write(cgx, lmac_id, CGXX_SMUX_CBFC_CTL, cfg);
675 }
676 }
677 }
678
cgx_get_rx_stats(void * cgxd,int lmac_id,int idx,u64 * rx_stat)679 int cgx_get_rx_stats(void *cgxd, int lmac_id, int idx, u64 *rx_stat)
680 {
681 struct cgx *cgx = cgxd;
682
683 if (!is_lmac_valid(cgx, lmac_id))
684 return -ENODEV;
685 *rx_stat = cgx_read(cgx, lmac_id, CGXX_CMRX_RX_STAT0 + (idx * 8));
686 return 0;
687 }
688
cgx_get_tx_stats(void * cgxd,int lmac_id,int idx,u64 * tx_stat)689 int cgx_get_tx_stats(void *cgxd, int lmac_id, int idx, u64 *tx_stat)
690 {
691 struct cgx *cgx = cgxd;
692
693 if (!is_lmac_valid(cgx, lmac_id))
694 return -ENODEV;
695 *tx_stat = cgx_read(cgx, lmac_id, CGXX_CMRX_TX_STAT0 + (idx * 8));
696 return 0;
697 }
698
cgx_features_get(void * cgxd)699 u64 cgx_features_get(void *cgxd)
700 {
701 return ((struct cgx *)cgxd)->hw_features;
702 }
703
cgx_set_fec_stats_count(struct cgx_link_user_info * linfo)704 static int cgx_set_fec_stats_count(struct cgx_link_user_info *linfo)
705 {
706 if (!linfo->fec)
707 return 0;
708
709 switch (linfo->lmac_type_id) {
710 case LMAC_MODE_SGMII:
711 case LMAC_MODE_XAUI:
712 case LMAC_MODE_RXAUI:
713 case LMAC_MODE_QSGMII:
714 return 0;
715 case LMAC_MODE_10G_R:
716 case LMAC_MODE_25G_R:
717 case LMAC_MODE_100G_R:
718 case LMAC_MODE_USXGMII:
719 return 1;
720 case LMAC_MODE_40G_R:
721 return 4;
722 case LMAC_MODE_50G_R:
723 if (linfo->fec == OTX2_FEC_BASER)
724 return 2;
725 else
726 return 1;
727 default:
728 return 0;
729 }
730 }
731
cgx_get_fec_stats(void * cgxd,int lmac_id,struct cgx_fec_stats_rsp * rsp)732 int cgx_get_fec_stats(void *cgxd, int lmac_id, struct cgx_fec_stats_rsp *rsp)
733 {
734 int stats, fec_stats_count = 0;
735 int corr_reg, uncorr_reg;
736 struct cgx *cgx = cgxd;
737
738 if (!is_lmac_valid(cgx, lmac_id))
739 return -ENODEV;
740
741 if (cgx->lmac_idmap[lmac_id]->link_info.fec == OTX2_FEC_NONE)
742 return 0;
743
744 fec_stats_count =
745 cgx_set_fec_stats_count(&cgx->lmac_idmap[lmac_id]->link_info);
746 if (cgx->lmac_idmap[lmac_id]->link_info.fec == OTX2_FEC_BASER) {
747 corr_reg = CGXX_SPUX_LNX_FEC_CORR_BLOCKS;
748 uncorr_reg = CGXX_SPUX_LNX_FEC_UNCORR_BLOCKS;
749 } else {
750 corr_reg = CGXX_SPUX_RSFEC_CORR;
751 uncorr_reg = CGXX_SPUX_RSFEC_UNCORR;
752 }
753 for (stats = 0; stats < fec_stats_count; stats++) {
754 rsp->fec_corr_blks +=
755 cgx_read(cgx, lmac_id, corr_reg + (stats * 8));
756 rsp->fec_uncorr_blks +=
757 cgx_read(cgx, lmac_id, uncorr_reg + (stats * 8));
758 }
759 return 0;
760 }
761
cgx_lmac_rx_tx_enable(void * cgxd,int lmac_id,bool enable)762 int cgx_lmac_rx_tx_enable(void *cgxd, int lmac_id, bool enable)
763 {
764 struct cgx *cgx = cgxd;
765 u64 cfg;
766
767 if (!is_lmac_valid(cgx, lmac_id))
768 return -ENODEV;
769
770 cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_CFG);
771 if (enable)
772 cfg |= DATA_PKT_RX_EN | DATA_PKT_TX_EN;
773 else
774 cfg &= ~(DATA_PKT_RX_EN | DATA_PKT_TX_EN);
775 cgx_write(cgx, lmac_id, CGXX_CMRX_CFG, cfg);
776 return 0;
777 }
778
cgx_lmac_tx_enable(void * cgxd,int lmac_id,bool enable)779 int cgx_lmac_tx_enable(void *cgxd, int lmac_id, bool enable)
780 {
781 struct cgx *cgx = cgxd;
782 u64 cfg, last;
783
784 if (!is_lmac_valid(cgx, lmac_id))
785 return -ENODEV;
786
787 cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_CFG);
788 last = cfg;
789 if (enable)
790 cfg |= DATA_PKT_TX_EN;
791 else
792 cfg &= ~DATA_PKT_TX_EN;
793
794 if (cfg != last)
795 cgx_write(cgx, lmac_id, CGXX_CMRX_CFG, cfg);
796 return !!(last & DATA_PKT_TX_EN);
797 }
798
cgx_lmac_enadis_pause_frm(void * cgxd,int lmac_id,u8 tx_pause,u8 rx_pause)799 static int cgx_lmac_enadis_pause_frm(void *cgxd, int lmac_id,
800 u8 tx_pause, u8 rx_pause)
801 {
802 struct cgx *cgx = cgxd;
803 u64 cfg;
804
805 if (is_dev_rpm(cgx))
806 return 0;
807
808 if (!is_lmac_valid(cgx, lmac_id))
809 return -ENODEV;
810
811 cfg = cgx_read(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL);
812 cfg &= ~CGX_GMP_GMI_RXX_FRM_CTL_CTL_BCK;
813 cfg |= rx_pause ? CGX_GMP_GMI_RXX_FRM_CTL_CTL_BCK : 0x0;
814 cgx_write(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL, cfg);
815
816 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL);
817 cfg &= ~CGX_SMUX_RX_FRM_CTL_CTL_BCK;
818 cfg |= rx_pause ? CGX_SMUX_RX_FRM_CTL_CTL_BCK : 0x0;
819 cgx_write(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL, cfg);
820
821 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_TX_CTL);
822 cfg &= ~CGX_SMUX_TX_CTL_L2P_BP_CONV;
823 cfg |= tx_pause ? CGX_SMUX_TX_CTL_L2P_BP_CONV : 0x0;
824 cgx_write(cgx, lmac_id, CGXX_SMUX_TX_CTL, cfg);
825
826 cfg = cgx_read(cgx, 0, CGXX_CMR_RX_OVR_BP);
827 if (tx_pause) {
828 cfg &= ~CGX_CMR_RX_OVR_BP_EN(lmac_id);
829 } else {
830 cfg |= CGX_CMR_RX_OVR_BP_EN(lmac_id);
831 cfg &= ~CGX_CMR_RX_OVR_BP_BP(lmac_id);
832 }
833 cgx_write(cgx, 0, CGXX_CMR_RX_OVR_BP, cfg);
834 return 0;
835 }
836
cgx_lmac_pause_frm_config(void * cgxd,int lmac_id,bool enable)837 static void cgx_lmac_pause_frm_config(void *cgxd, int lmac_id, bool enable)
838 {
839 struct cgx *cgx = cgxd;
840 u64 cfg;
841
842 if (!is_lmac_valid(cgx, lmac_id))
843 return;
844
845 if (enable) {
846 /* Set pause time and interval */
847 cgx_write(cgx, lmac_id, CGXX_SMUX_TX_PAUSE_PKT_TIME,
848 DEFAULT_PAUSE_TIME);
849 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_TX_PAUSE_PKT_INTERVAL);
850 cfg &= ~0xFFFFULL;
851 cgx_write(cgx, lmac_id, CGXX_SMUX_TX_PAUSE_PKT_INTERVAL,
852 cfg | (DEFAULT_PAUSE_TIME / 2));
853
854 cgx_write(cgx, lmac_id, CGXX_GMP_GMI_TX_PAUSE_PKT_TIME,
855 DEFAULT_PAUSE_TIME);
856
857 cfg = cgx_read(cgx, lmac_id,
858 CGXX_GMP_GMI_TX_PAUSE_PKT_INTERVAL);
859 cfg &= ~0xFFFFULL;
860 cgx_write(cgx, lmac_id, CGXX_GMP_GMI_TX_PAUSE_PKT_INTERVAL,
861 cfg | (DEFAULT_PAUSE_TIME / 2));
862 }
863
864 /* ALL pause frames received are completely ignored */
865 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL);
866 cfg &= ~CGX_SMUX_RX_FRM_CTL_CTL_BCK;
867 cgx_write(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL, cfg);
868
869 cfg = cgx_read(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL);
870 cfg &= ~CGX_GMP_GMI_RXX_FRM_CTL_CTL_BCK;
871 cgx_write(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL, cfg);
872
873 /* Disable pause frames transmission */
874 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_TX_CTL);
875 cfg &= ~CGX_SMUX_TX_CTL_L2P_BP_CONV;
876 cgx_write(cgx, lmac_id, CGXX_SMUX_TX_CTL, cfg);
877
878 cfg = cgx_read(cgx, 0, CGXX_CMR_RX_OVR_BP);
879 cfg |= CGX_CMR_RX_OVR_BP_EN(lmac_id);
880 cfg &= ~CGX_CMR_RX_OVR_BP_BP(lmac_id);
881 cgx_write(cgx, 0, CGXX_CMR_RX_OVR_BP, cfg);
882
883 /* Disable all PFC classes by default */
884 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_CBFC_CTL);
885 cfg = FIELD_SET(CGX_PFC_CLASS_MASK, 0, cfg);
886 cgx_write(cgx, lmac_id, CGXX_SMUX_CBFC_CTL, cfg);
887 }
888
verify_lmac_fc_cfg(void * cgxd,int lmac_id,u8 tx_pause,u8 rx_pause,int pfvf_idx)889 int verify_lmac_fc_cfg(void *cgxd, int lmac_id, u8 tx_pause, u8 rx_pause,
890 int pfvf_idx)
891 {
892 struct cgx *cgx = cgxd;
893 struct lmac *lmac;
894
895 lmac = lmac_pdata(lmac_id, cgx);
896 if (!lmac)
897 return -ENODEV;
898
899 if (!rx_pause)
900 clear_bit(pfvf_idx, lmac->rx_fc_pfvf_bmap.bmap);
901 else
902 set_bit(pfvf_idx, lmac->rx_fc_pfvf_bmap.bmap);
903
904 if (!tx_pause)
905 clear_bit(pfvf_idx, lmac->tx_fc_pfvf_bmap.bmap);
906 else
907 set_bit(pfvf_idx, lmac->tx_fc_pfvf_bmap.bmap);
908
909 /* check if other pfvfs are using flow control */
910 if (!rx_pause && bitmap_weight(lmac->rx_fc_pfvf_bmap.bmap, lmac->rx_fc_pfvf_bmap.max)) {
911 dev_warn(&cgx->pdev->dev,
912 "Receive Flow control disable not permitted as its used by other PFVFs\n");
913 return -EPERM;
914 }
915
916 if (!tx_pause && bitmap_weight(lmac->tx_fc_pfvf_bmap.bmap, lmac->tx_fc_pfvf_bmap.max)) {
917 dev_warn(&cgx->pdev->dev,
918 "Transmit Flow control disable not permitted as its used by other PFVFs\n");
919 return -EPERM;
920 }
921
922 return 0;
923 }
924
cgx_lmac_pfc_config(void * cgxd,int lmac_id,u8 tx_pause,u8 rx_pause,u16 pfc_en)925 int cgx_lmac_pfc_config(void *cgxd, int lmac_id, u8 tx_pause,
926 u8 rx_pause, u16 pfc_en)
927 {
928 struct cgx *cgx = cgxd;
929 u64 cfg;
930
931 if (!is_lmac_valid(cgx, lmac_id))
932 return -ENODEV;
933
934 /* Return as no traffic classes are requested */
935 if (tx_pause && !pfc_en)
936 return 0;
937
938 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_CBFC_CTL);
939 pfc_en |= FIELD_GET(CGX_PFC_CLASS_MASK, cfg);
940
941 if (rx_pause) {
942 cfg |= (CGXX_SMUX_CBFC_CTL_RX_EN |
943 CGXX_SMUX_CBFC_CTL_BCK_EN |
944 CGXX_SMUX_CBFC_CTL_DRP_EN);
945 } else {
946 cfg &= ~(CGXX_SMUX_CBFC_CTL_RX_EN |
947 CGXX_SMUX_CBFC_CTL_BCK_EN |
948 CGXX_SMUX_CBFC_CTL_DRP_EN);
949 }
950
951 if (tx_pause) {
952 cfg |= CGXX_SMUX_CBFC_CTL_TX_EN;
953 cfg = FIELD_SET(CGX_PFC_CLASS_MASK, pfc_en, cfg);
954 } else {
955 cfg &= ~CGXX_SMUX_CBFC_CTL_TX_EN;
956 cfg = FIELD_SET(CGX_PFC_CLASS_MASK, 0, cfg);
957 }
958
959 cgx_write(cgx, lmac_id, CGXX_SMUX_CBFC_CTL, cfg);
960
961 /* Write source MAC address which will be filled into PFC packet */
962 cfg = cgx_lmac_addr_get(cgx->cgx_id, lmac_id);
963 cgx_write(cgx, lmac_id, CGXX_SMUX_SMAC, cfg);
964
965 return 0;
966 }
967
cgx_lmac_get_pfc_frm_cfg(void * cgxd,int lmac_id,u8 * tx_pause,u8 * rx_pause)968 int cgx_lmac_get_pfc_frm_cfg(void *cgxd, int lmac_id, u8 *tx_pause,
969 u8 *rx_pause)
970 {
971 struct cgx *cgx = cgxd;
972 u64 cfg;
973
974 if (!is_lmac_valid(cgx, lmac_id))
975 return -ENODEV;
976
977 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_CBFC_CTL);
978
979 *rx_pause = !!(cfg & CGXX_SMUX_CBFC_CTL_RX_EN);
980 *tx_pause = !!(cfg & CGXX_SMUX_CBFC_CTL_TX_EN);
981
982 return 0;
983 }
984
cgx_lmac_ptp_config(void * cgxd,int lmac_id,bool enable)985 void cgx_lmac_ptp_config(void *cgxd, int lmac_id, bool enable)
986 {
987 struct cgx *cgx = cgxd;
988 u64 cfg;
989
990 if (!cgx)
991 return;
992
993 if (enable) {
994 /* Enable inbound PTP timestamping */
995 cfg = cgx_read(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL);
996 cfg |= CGX_GMP_GMI_RXX_FRM_CTL_PTP_MODE;
997 cgx_write(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL, cfg);
998
999 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL);
1000 cfg |= CGX_SMUX_RX_FRM_CTL_PTP_MODE;
1001 cgx_write(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL, cfg);
1002 } else {
1003 /* Disable inbound PTP stamping */
1004 cfg = cgx_read(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL);
1005 cfg &= ~CGX_GMP_GMI_RXX_FRM_CTL_PTP_MODE;
1006 cgx_write(cgx, lmac_id, CGXX_GMP_GMI_RXX_FRM_CTL, cfg);
1007
1008 cfg = cgx_read(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL);
1009 cfg &= ~CGX_SMUX_RX_FRM_CTL_PTP_MODE;
1010 cgx_write(cgx, lmac_id, CGXX_SMUX_RX_FRM_CTL, cfg);
1011 }
1012 }
1013
1014 /* CGX Firmware interface low level support */
cgx_fwi_cmd_send(u64 req,u64 * resp,struct lmac * lmac)1015 int cgx_fwi_cmd_send(u64 req, u64 *resp, struct lmac *lmac)
1016 {
1017 struct cgx *cgx = lmac->cgx;
1018 struct device *dev;
1019 int err = 0;
1020 u64 cmd;
1021
1022 /* Ensure no other command is in progress */
1023 err = mutex_lock_interruptible(&lmac->cmd_lock);
1024 if (err)
1025 return err;
1026
1027 /* Ensure command register is free */
1028 cmd = cgx_read(cgx, lmac->lmac_id, CGX_COMMAND_REG);
1029 if (FIELD_GET(CMDREG_OWN, cmd) != CGX_CMD_OWN_NS) {
1030 err = -EBUSY;
1031 goto unlock;
1032 }
1033
1034 /* Update ownership in command request */
1035 req = FIELD_SET(CMDREG_OWN, CGX_CMD_OWN_FIRMWARE, req);
1036
1037 /* Mark this lmac as pending, before we start */
1038 lmac->cmd_pend = true;
1039
1040 /* Start command in hardware */
1041 cgx_write(cgx, lmac->lmac_id, CGX_COMMAND_REG, req);
1042
1043 /* Ensure command is completed without errors */
1044 if (!wait_event_timeout(lmac->wq_cmd_cmplt, !lmac->cmd_pend,
1045 msecs_to_jiffies(CGX_CMD_TIMEOUT))) {
1046 dev = &cgx->pdev->dev;
1047 dev_err(dev, "cgx port %d:%d cmd %lld timeout\n",
1048 cgx->cgx_id, lmac->lmac_id, FIELD_GET(CMDREG_ID, req));
1049 err = LMAC_AF_ERR_CMD_TIMEOUT;
1050 goto unlock;
1051 }
1052
1053 /* we have a valid command response */
1054 smp_rmb(); /* Ensure the latest updates are visible */
1055 *resp = lmac->resp;
1056
1057 unlock:
1058 mutex_unlock(&lmac->cmd_lock);
1059
1060 return err;
1061 }
1062
cgx_fwi_cmd_generic(u64 req,u64 * resp,struct cgx * cgx,int lmac_id)1063 int cgx_fwi_cmd_generic(u64 req, u64 *resp, struct cgx *cgx, int lmac_id)
1064 {
1065 struct lmac *lmac;
1066 int err;
1067
1068 lmac = lmac_pdata(lmac_id, cgx);
1069 if (!lmac)
1070 return -ENODEV;
1071
1072 err = cgx_fwi_cmd_send(req, resp, lmac);
1073
1074 /* Check for valid response */
1075 if (!err) {
1076 if (FIELD_GET(EVTREG_STAT, *resp) == CGX_STAT_FAIL)
1077 return -EIO;
1078 else
1079 return 0;
1080 }
1081
1082 return err;
1083 }
1084
cgx_link_usertable_index_map(int speed)1085 static int cgx_link_usertable_index_map(int speed)
1086 {
1087 switch (speed) {
1088 case SPEED_10:
1089 return CGX_LINK_10M;
1090 case SPEED_100:
1091 return CGX_LINK_100M;
1092 case SPEED_1000:
1093 return CGX_LINK_1G;
1094 case SPEED_2500:
1095 return CGX_LINK_2HG;
1096 case SPEED_5000:
1097 return CGX_LINK_5G;
1098 case SPEED_10000:
1099 return CGX_LINK_10G;
1100 case SPEED_20000:
1101 return CGX_LINK_20G;
1102 case SPEED_25000:
1103 return CGX_LINK_25G;
1104 case SPEED_40000:
1105 return CGX_LINK_40G;
1106 case SPEED_50000:
1107 return CGX_LINK_50G;
1108 case 80000:
1109 return CGX_LINK_80G;
1110 case SPEED_100000:
1111 return CGX_LINK_100G;
1112 case SPEED_UNKNOWN:
1113 return CGX_LINK_NONE;
1114 }
1115 return CGX_LINK_NONE;
1116 }
1117
set_mod_args(struct cgx_set_link_mode_args * args,u32 speed,u8 duplex,u8 autoneg,u64 mode)1118 static void set_mod_args(struct cgx_set_link_mode_args *args,
1119 u32 speed, u8 duplex, u8 autoneg, u64 mode)
1120 {
1121 /* Fill default values incase of user did not pass
1122 * valid parameters
1123 */
1124 if (args->duplex == DUPLEX_UNKNOWN)
1125 args->duplex = duplex;
1126 if (args->speed == SPEED_UNKNOWN)
1127 args->speed = speed;
1128 if (args->an == AUTONEG_UNKNOWN)
1129 args->an = autoneg;
1130 args->mode = mode;
1131 args->ports = 0;
1132 }
1133
otx2_map_ethtool_link_modes(u64 bitmask,struct cgx_set_link_mode_args * args)1134 static void otx2_map_ethtool_link_modes(u64 bitmask,
1135 struct cgx_set_link_mode_args *args)
1136 {
1137 switch (bitmask) {
1138 case ETHTOOL_LINK_MODE_10baseT_Half_BIT:
1139 set_mod_args(args, 10, 1, 1, BIT_ULL(CGX_MODE_SGMII));
1140 break;
1141 case ETHTOOL_LINK_MODE_10baseT_Full_BIT:
1142 set_mod_args(args, 10, 0, 1, BIT_ULL(CGX_MODE_SGMII));
1143 break;
1144 case ETHTOOL_LINK_MODE_100baseT_Half_BIT:
1145 set_mod_args(args, 100, 1, 1, BIT_ULL(CGX_MODE_SGMII));
1146 break;
1147 case ETHTOOL_LINK_MODE_100baseT_Full_BIT:
1148 set_mod_args(args, 100, 0, 1, BIT_ULL(CGX_MODE_SGMII));
1149 break;
1150 case ETHTOOL_LINK_MODE_1000baseT_Half_BIT:
1151 set_mod_args(args, 1000, 1, 1, BIT_ULL(CGX_MODE_SGMII));
1152 break;
1153 case ETHTOOL_LINK_MODE_1000baseT_Full_BIT:
1154 set_mod_args(args, 1000, 0, 1, BIT_ULL(CGX_MODE_SGMII));
1155 break;
1156 case ETHTOOL_LINK_MODE_1000baseX_Full_BIT:
1157 set_mod_args(args, 1000, 0, 0, BIT_ULL(CGX_MODE_1000_BASEX));
1158 break;
1159 case ETHTOOL_LINK_MODE_10000baseT_Full_BIT:
1160 set_mod_args(args, 1000, 0, 1, BIT_ULL(CGX_MODE_QSGMII));
1161 break;
1162 case ETHTOOL_LINK_MODE_10000baseSR_Full_BIT:
1163 set_mod_args(args, 10000, 0, 0, BIT_ULL(CGX_MODE_10G_C2C));
1164 break;
1165 case ETHTOOL_LINK_MODE_10000baseLR_Full_BIT:
1166 set_mod_args(args, 10000, 0, 0, BIT_ULL(CGX_MODE_10G_C2M));
1167 break;
1168 case ETHTOOL_LINK_MODE_10000baseKR_Full_BIT:
1169 set_mod_args(args, 10000, 0, 1, BIT_ULL(CGX_MODE_10G_KR));
1170 break;
1171 case ETHTOOL_LINK_MODE_25000baseSR_Full_BIT:
1172 set_mod_args(args, 25000, 0, 0, BIT_ULL(CGX_MODE_25G_C2C));
1173 break;
1174 case ETHTOOL_LINK_MODE_25000baseCR_Full_BIT:
1175 set_mod_args(args, 25000, 0, 1, BIT_ULL(CGX_MODE_25G_CR));
1176 break;
1177 case ETHTOOL_LINK_MODE_25000baseKR_Full_BIT:
1178 set_mod_args(args, 25000, 0, 1, BIT_ULL(CGX_MODE_25G_KR));
1179 break;
1180 case ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT:
1181 set_mod_args(args, 40000, 0, 0, BIT_ULL(CGX_MODE_40G_C2C));
1182 break;
1183 case ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT:
1184 set_mod_args(args, 40000, 0, 0, BIT_ULL(CGX_MODE_40G_C2M));
1185 break;
1186 case ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT:
1187 set_mod_args(args, 40000, 0, 1, BIT_ULL(CGX_MODE_40G_CR4));
1188 break;
1189 case ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT:
1190 set_mod_args(args, 40000, 0, 1, BIT_ULL(CGX_MODE_40G_KR4));
1191 break;
1192 case ETHTOOL_LINK_MODE_50000baseSR_Full_BIT:
1193 set_mod_args(args, 50000, 0, 0, BIT_ULL(CGX_MODE_50G_C2C));
1194 break;
1195 case ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT:
1196 set_mod_args(args, 50000, 0, 0, BIT_ULL(CGX_MODE_50G_C2M));
1197 break;
1198 case ETHTOOL_LINK_MODE_50000baseCR_Full_BIT:
1199 set_mod_args(args, 50000, 0, 1, BIT_ULL(CGX_MODE_50G_CR));
1200 break;
1201 case ETHTOOL_LINK_MODE_50000baseKR_Full_BIT:
1202 set_mod_args(args, 50000, 0, 1, BIT_ULL(CGX_MODE_50G_KR));
1203 break;
1204 case ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT:
1205 set_mod_args(args, 100000, 0, 0, BIT_ULL(CGX_MODE_100G_C2C));
1206 break;
1207 case ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT:
1208 set_mod_args(args, 100000, 0, 0, BIT_ULL(CGX_MODE_100G_C2M));
1209 break;
1210 case ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT:
1211 set_mod_args(args, 100000, 0, 1, BIT_ULL(CGX_MODE_100G_CR4));
1212 break;
1213 case ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT:
1214 set_mod_args(args, 100000, 0, 1, BIT_ULL(CGX_MODE_100G_KR4));
1215 break;
1216 default:
1217 set_mod_args(args, 0, 1, 0, BIT_ULL(CGX_MODE_MAX));
1218 break;
1219 }
1220 }
1221
link_status_user_format(u64 lstat,struct cgx_link_user_info * linfo,struct cgx * cgx,u8 lmac_id)1222 static inline void link_status_user_format(u64 lstat,
1223 struct cgx_link_user_info *linfo,
1224 struct cgx *cgx, u8 lmac_id)
1225 {
1226 const char *lmac_string;
1227
1228 linfo->link_up = FIELD_GET(RESP_LINKSTAT_UP, lstat);
1229 linfo->full_duplex = FIELD_GET(RESP_LINKSTAT_FDUPLEX, lstat);
1230 linfo->speed = cgx_speed_mbps[FIELD_GET(RESP_LINKSTAT_SPEED, lstat)];
1231 linfo->an = FIELD_GET(RESP_LINKSTAT_AN, lstat);
1232 linfo->fec = FIELD_GET(RESP_LINKSTAT_FEC, lstat);
1233 linfo->lmac_type_id = FIELD_GET(RESP_LINKSTAT_LMAC_TYPE, lstat);
1234
1235 if (linfo->lmac_type_id >= LMAC_MODE_MAX) {
1236 dev_err(&cgx->pdev->dev, "Unknown lmac_type_id %d reported by firmware on cgx port%d:%d",
1237 linfo->lmac_type_id, cgx->cgx_id, lmac_id);
1238 strncpy(linfo->lmac_type, "Unknown", LMACTYPE_STR_LEN - 1);
1239 return;
1240 }
1241
1242 lmac_string = cgx_lmactype_string[linfo->lmac_type_id];
1243 strncpy(linfo->lmac_type, lmac_string, LMACTYPE_STR_LEN - 1);
1244 }
1245
1246 /* Hardware event handlers */
cgx_link_change_handler(u64 lstat,struct lmac * lmac)1247 static inline void cgx_link_change_handler(u64 lstat,
1248 struct lmac *lmac)
1249 {
1250 struct cgx_link_user_info *linfo;
1251 struct cgx *cgx = lmac->cgx;
1252 struct cgx_link_event event;
1253 struct device *dev;
1254 int err_type;
1255
1256 dev = &cgx->pdev->dev;
1257
1258 link_status_user_format(lstat, &event.link_uinfo, cgx, lmac->lmac_id);
1259 err_type = FIELD_GET(RESP_LINKSTAT_ERRTYPE, lstat);
1260
1261 event.cgx_id = cgx->cgx_id;
1262 event.lmac_id = lmac->lmac_id;
1263
1264 /* update the local copy of link status */
1265 lmac->link_info = event.link_uinfo;
1266 linfo = &lmac->link_info;
1267
1268 if (err_type == CGX_ERR_SPEED_CHANGE_INVALID)
1269 return;
1270
1271 /* Ensure callback doesn't get unregistered until we finish it */
1272 spin_lock(&lmac->event_cb_lock);
1273
1274 if (!lmac->event_cb.notify_link_chg) {
1275 dev_dbg(dev, "cgx port %d:%d Link change handler null",
1276 cgx->cgx_id, lmac->lmac_id);
1277 if (err_type != CGX_ERR_NONE) {
1278 dev_err(dev, "cgx port %d:%d Link error %d\n",
1279 cgx->cgx_id, lmac->lmac_id, err_type);
1280 }
1281 dev_info(dev, "cgx port %d:%d Link is %s %d Mbps\n",
1282 cgx->cgx_id, lmac->lmac_id,
1283 linfo->link_up ? "UP" : "DOWN", linfo->speed);
1284 goto err;
1285 }
1286
1287 if (lmac->event_cb.notify_link_chg(&event, lmac->event_cb.data))
1288 dev_err(dev, "event notification failure\n");
1289 err:
1290 spin_unlock(&lmac->event_cb_lock);
1291 }
1292
cgx_cmdresp_is_linkevent(u64 event)1293 static inline bool cgx_cmdresp_is_linkevent(u64 event)
1294 {
1295 u8 id;
1296
1297 id = FIELD_GET(EVTREG_ID, event);
1298 if (id == CGX_CMD_LINK_BRING_UP ||
1299 id == CGX_CMD_LINK_BRING_DOWN ||
1300 id == CGX_CMD_MODE_CHANGE)
1301 return true;
1302 else
1303 return false;
1304 }
1305
cgx_event_is_linkevent(u64 event)1306 static inline bool cgx_event_is_linkevent(u64 event)
1307 {
1308 if (FIELD_GET(EVTREG_ID, event) == CGX_EVT_LINK_CHANGE)
1309 return true;
1310 else
1311 return false;
1312 }
1313
cgx_fwi_event_handler(int irq,void * data)1314 static irqreturn_t cgx_fwi_event_handler(int irq, void *data)
1315 {
1316 u64 event, offset, clear_bit;
1317 struct lmac *lmac = data;
1318 struct cgx *cgx;
1319
1320 cgx = lmac->cgx;
1321
1322 /* Clear SW_INT for RPM and CMR_INT for CGX */
1323 offset = cgx->mac_ops->int_register;
1324 clear_bit = cgx->mac_ops->int_ena_bit;
1325
1326 event = cgx_read(cgx, lmac->lmac_id, CGX_EVENT_REG);
1327
1328 if (!FIELD_GET(EVTREG_ACK, event))
1329 return IRQ_NONE;
1330
1331 switch (FIELD_GET(EVTREG_EVT_TYPE, event)) {
1332 case CGX_EVT_CMD_RESP:
1333 /* Copy the response. Since only one command is active at a
1334 * time, there is no way a response can get overwritten
1335 */
1336 lmac->resp = event;
1337 /* Ensure response is updated before thread context starts */
1338 smp_wmb();
1339
1340 /* There wont be separate events for link change initiated from
1341 * software; Hence report the command responses as events
1342 */
1343 if (cgx_cmdresp_is_linkevent(event))
1344 cgx_link_change_handler(event, lmac);
1345
1346 /* Release thread waiting for completion */
1347 lmac->cmd_pend = false;
1348 wake_up(&lmac->wq_cmd_cmplt);
1349 break;
1350 case CGX_EVT_ASYNC:
1351 if (cgx_event_is_linkevent(event))
1352 cgx_link_change_handler(event, lmac);
1353 break;
1354 }
1355
1356 /* Any new event or command response will be posted by firmware
1357 * only after the current status is acked.
1358 * Ack the interrupt register as well.
1359 */
1360 cgx_write(lmac->cgx, lmac->lmac_id, CGX_EVENT_REG, 0);
1361 cgx_write(lmac->cgx, lmac->lmac_id, offset, clear_bit);
1362
1363 return IRQ_HANDLED;
1364 }
1365
1366 /* APIs for PHY management using CGX firmware interface */
1367
1368 /* callback registration for hardware events like link change */
cgx_lmac_evh_register(struct cgx_event_cb * cb,void * cgxd,int lmac_id)1369 int cgx_lmac_evh_register(struct cgx_event_cb *cb, void *cgxd, int lmac_id)
1370 {
1371 struct cgx *cgx = cgxd;
1372 struct lmac *lmac;
1373
1374 lmac = lmac_pdata(lmac_id, cgx);
1375 if (!lmac)
1376 return -ENODEV;
1377
1378 lmac->event_cb = *cb;
1379
1380 return 0;
1381 }
1382
cgx_lmac_evh_unregister(void * cgxd,int lmac_id)1383 int cgx_lmac_evh_unregister(void *cgxd, int lmac_id)
1384 {
1385 struct lmac *lmac;
1386 unsigned long flags;
1387 struct cgx *cgx = cgxd;
1388
1389 lmac = lmac_pdata(lmac_id, cgx);
1390 if (!lmac)
1391 return -ENODEV;
1392
1393 spin_lock_irqsave(&lmac->event_cb_lock, flags);
1394 lmac->event_cb.notify_link_chg = NULL;
1395 lmac->event_cb.data = NULL;
1396 spin_unlock_irqrestore(&lmac->event_cb_lock, flags);
1397
1398 return 0;
1399 }
1400
cgx_get_fwdata_base(u64 * base)1401 int cgx_get_fwdata_base(u64 *base)
1402 {
1403 u64 req = 0, resp;
1404 struct cgx *cgx;
1405 int first_lmac;
1406 int err;
1407
1408 cgx = list_first_entry_or_null(&cgx_list, struct cgx, cgx_list);
1409 if (!cgx)
1410 return -ENXIO;
1411
1412 first_lmac = find_first_bit(&cgx->lmac_bmap, cgx->max_lmac_per_mac);
1413 req = FIELD_SET(CMDREG_ID, CGX_CMD_GET_FWD_BASE, req);
1414 err = cgx_fwi_cmd_generic(req, &resp, cgx, first_lmac);
1415 if (!err)
1416 *base = FIELD_GET(RESP_FWD_BASE, resp);
1417
1418 return err;
1419 }
1420
cgx_set_link_mode(void * cgxd,struct cgx_set_link_mode_args args,int cgx_id,int lmac_id)1421 int cgx_set_link_mode(void *cgxd, struct cgx_set_link_mode_args args,
1422 int cgx_id, int lmac_id)
1423 {
1424 struct cgx *cgx = cgxd;
1425 u64 req = 0, resp;
1426
1427 if (!cgx)
1428 return -ENODEV;
1429
1430 if (args.mode)
1431 otx2_map_ethtool_link_modes(args.mode, &args);
1432 if (!args.speed && args.duplex && !args.an)
1433 return -EINVAL;
1434
1435 req = FIELD_SET(CMDREG_ID, CGX_CMD_MODE_CHANGE, req);
1436 req = FIELD_SET(CMDMODECHANGE_SPEED,
1437 cgx_link_usertable_index_map(args.speed), req);
1438 req = FIELD_SET(CMDMODECHANGE_DUPLEX, args.duplex, req);
1439 req = FIELD_SET(CMDMODECHANGE_AN, args.an, req);
1440 req = FIELD_SET(CMDMODECHANGE_PORT, args.ports, req);
1441 req = FIELD_SET(CMDMODECHANGE_FLAGS, args.mode, req);
1442
1443 return cgx_fwi_cmd_generic(req, &resp, cgx, lmac_id);
1444 }
cgx_set_fec(u64 fec,int cgx_id,int lmac_id)1445 int cgx_set_fec(u64 fec, int cgx_id, int lmac_id)
1446 {
1447 u64 req = 0, resp;
1448 struct cgx *cgx;
1449 int err = 0;
1450
1451 cgx = cgx_get_pdata(cgx_id);
1452 if (!cgx)
1453 return -ENXIO;
1454
1455 req = FIELD_SET(CMDREG_ID, CGX_CMD_SET_FEC, req);
1456 req = FIELD_SET(CMDSETFEC, fec, req);
1457 err = cgx_fwi_cmd_generic(req, &resp, cgx, lmac_id);
1458 if (err)
1459 return err;
1460
1461 cgx->lmac_idmap[lmac_id]->link_info.fec =
1462 FIELD_GET(RESP_LINKSTAT_FEC, resp);
1463 return cgx->lmac_idmap[lmac_id]->link_info.fec;
1464 }
1465
cgx_get_phy_fec_stats(void * cgxd,int lmac_id)1466 int cgx_get_phy_fec_stats(void *cgxd, int lmac_id)
1467 {
1468 struct cgx *cgx = cgxd;
1469 u64 req = 0, resp;
1470
1471 if (!cgx)
1472 return -ENODEV;
1473
1474 req = FIELD_SET(CMDREG_ID, CGX_CMD_GET_PHY_FEC_STATS, req);
1475 return cgx_fwi_cmd_generic(req, &resp, cgx, lmac_id);
1476 }
1477
cgx_fwi_link_change(struct cgx * cgx,int lmac_id,bool enable)1478 static int cgx_fwi_link_change(struct cgx *cgx, int lmac_id, bool enable)
1479 {
1480 u64 req = 0;
1481 u64 resp;
1482
1483 if (enable) {
1484 req = FIELD_SET(CMDREG_ID, CGX_CMD_LINK_BRING_UP, req);
1485 /* On CN10K firmware offloads link bring up/down operations to ECP
1486 * On Octeontx2 link operations are handled by firmware itself
1487 * which can cause mbox errors so configure maximum time firmware
1488 * poll for Link as 1000 ms
1489 */
1490 if (!is_dev_rpm(cgx))
1491 req = FIELD_SET(LINKCFG_TIMEOUT, 1000, req);
1492
1493 } else {
1494 req = FIELD_SET(CMDREG_ID, CGX_CMD_LINK_BRING_DOWN, req);
1495 }
1496 return cgx_fwi_cmd_generic(req, &resp, cgx, lmac_id);
1497 }
1498
cgx_fwi_read_version(u64 * resp,struct cgx * cgx)1499 static inline int cgx_fwi_read_version(u64 *resp, struct cgx *cgx)
1500 {
1501 int first_lmac = find_first_bit(&cgx->lmac_bmap, cgx->max_lmac_per_mac);
1502 u64 req = 0;
1503
1504 req = FIELD_SET(CMDREG_ID, CGX_CMD_GET_FW_VER, req);
1505 return cgx_fwi_cmd_generic(req, resp, cgx, first_lmac);
1506 }
1507
cgx_lmac_verify_fwi_version(struct cgx * cgx)1508 static int cgx_lmac_verify_fwi_version(struct cgx *cgx)
1509 {
1510 struct device *dev = &cgx->pdev->dev;
1511 int major_ver, minor_ver;
1512 u64 resp;
1513 int err;
1514
1515 if (!cgx->lmac_count)
1516 return 0;
1517
1518 err = cgx_fwi_read_version(&resp, cgx);
1519 if (err)
1520 return err;
1521
1522 major_ver = FIELD_GET(RESP_MAJOR_VER, resp);
1523 minor_ver = FIELD_GET(RESP_MINOR_VER, resp);
1524 dev_dbg(dev, "Firmware command interface version = %d.%d\n",
1525 major_ver, minor_ver);
1526 if (major_ver != CGX_FIRMWARE_MAJOR_VER)
1527 return -EIO;
1528 else
1529 return 0;
1530 }
1531
cgx_lmac_linkup_work(struct work_struct * work)1532 static void cgx_lmac_linkup_work(struct work_struct *work)
1533 {
1534 struct cgx *cgx = container_of(work, struct cgx, cgx_cmd_work);
1535 struct device *dev = &cgx->pdev->dev;
1536 int i, err;
1537
1538 /* Do Link up for all the enabled lmacs */
1539 for_each_set_bit(i, &cgx->lmac_bmap, cgx->max_lmac_per_mac) {
1540 err = cgx_fwi_link_change(cgx, i, true);
1541 if (err)
1542 dev_info(dev, "cgx port %d:%d Link up command failed\n",
1543 cgx->cgx_id, i);
1544 }
1545 }
1546
cgx_lmac_linkup_start(void * cgxd)1547 int cgx_lmac_linkup_start(void *cgxd)
1548 {
1549 struct cgx *cgx = cgxd;
1550
1551 if (!cgx)
1552 return -ENODEV;
1553
1554 queue_work(cgx->cgx_cmd_workq, &cgx->cgx_cmd_work);
1555
1556 return 0;
1557 }
1558
cgx_lmac_reset(void * cgxd,int lmac_id,u8 pf_req_flr)1559 int cgx_lmac_reset(void *cgxd, int lmac_id, u8 pf_req_flr)
1560 {
1561 struct cgx *cgx = cgxd;
1562 u64 cfg;
1563
1564 if (!is_lmac_valid(cgx, lmac_id))
1565 return -ENODEV;
1566
1567 /* Resetting PFC related CSRs */
1568 cfg = 0xff;
1569 cgx_write(cgxd, lmac_id, CGXX_CMRX_RX_LOGL_XON, cfg);
1570
1571 if (pf_req_flr)
1572 cgx_lmac_internal_loopback(cgxd, lmac_id, false);
1573 return 0;
1574 }
1575
cgx_configure_interrupt(struct cgx * cgx,struct lmac * lmac,int cnt,bool req_free)1576 static int cgx_configure_interrupt(struct cgx *cgx, struct lmac *lmac,
1577 int cnt, bool req_free)
1578 {
1579 struct mac_ops *mac_ops = cgx->mac_ops;
1580 u64 offset, ena_bit;
1581 unsigned int irq;
1582 int err;
1583
1584 irq = pci_irq_vector(cgx->pdev, mac_ops->lmac_fwi +
1585 cnt * mac_ops->irq_offset);
1586 offset = mac_ops->int_set_reg;
1587 ena_bit = mac_ops->int_ena_bit;
1588
1589 if (req_free) {
1590 free_irq(irq, lmac);
1591 return 0;
1592 }
1593
1594 err = request_irq(irq, cgx_fwi_event_handler, 0, lmac->name, lmac);
1595 if (err)
1596 return err;
1597
1598 /* Enable interrupt */
1599 cgx_write(cgx, lmac->lmac_id, offset, ena_bit);
1600 return 0;
1601 }
1602
cgx_get_nr_lmacs(void * cgxd)1603 int cgx_get_nr_lmacs(void *cgxd)
1604 {
1605 struct cgx *cgx = cgxd;
1606
1607 return cgx_read(cgx, 0, CGXX_CMRX_RX_LMACS) & 0x7ULL;
1608 }
1609
cgx_get_lmacid(void * cgxd,u8 lmac_index)1610 u8 cgx_get_lmacid(void *cgxd, u8 lmac_index)
1611 {
1612 struct cgx *cgx = cgxd;
1613
1614 return cgx->lmac_idmap[lmac_index]->lmac_id;
1615 }
1616
cgx_get_lmac_bmap(void * cgxd)1617 unsigned long cgx_get_lmac_bmap(void *cgxd)
1618 {
1619 struct cgx *cgx = cgxd;
1620
1621 return cgx->lmac_bmap;
1622 }
1623
cgx_lmac_init(struct cgx * cgx)1624 static int cgx_lmac_init(struct cgx *cgx)
1625 {
1626 struct lmac *lmac;
1627 u64 lmac_list;
1628 int i, err;
1629
1630 /* lmac_list specifies which lmacs are enabled
1631 * when bit n is set to 1, LMAC[n] is enabled
1632 */
1633 if (cgx->mac_ops->non_contiguous_serdes_lane) {
1634 if (is_dev_rpm2(cgx))
1635 lmac_list =
1636 cgx_read(cgx, 0, RPM2_CMRX_RX_LMACS) & 0xFFULL;
1637 else
1638 lmac_list =
1639 cgx_read(cgx, 0, CGXX_CMRX_RX_LMACS) & 0xFULL;
1640 }
1641
1642 if (cgx->lmac_count > cgx->max_lmac_per_mac)
1643 cgx->lmac_count = cgx->max_lmac_per_mac;
1644
1645 for (i = 0; i < cgx->lmac_count; i++) {
1646 lmac = kzalloc(sizeof(struct lmac), GFP_KERNEL);
1647 if (!lmac)
1648 return -ENOMEM;
1649 lmac->name = kcalloc(1, sizeof("cgx_fwi_xxx_yyy"), GFP_KERNEL);
1650 if (!lmac->name) {
1651 err = -ENOMEM;
1652 goto err_lmac_free;
1653 }
1654 sprintf(lmac->name, "cgx_fwi_%d_%d", cgx->cgx_id, i);
1655 if (cgx->mac_ops->non_contiguous_serdes_lane) {
1656 lmac->lmac_id = __ffs64(lmac_list);
1657 lmac_list &= ~BIT_ULL(lmac->lmac_id);
1658 } else {
1659 lmac->lmac_id = i;
1660 }
1661
1662 lmac->cgx = cgx;
1663 lmac->mac_to_index_bmap.max =
1664 cgx->mac_ops->dmac_filter_count /
1665 cgx->lmac_count;
1666
1667 err = rvu_alloc_bitmap(&lmac->mac_to_index_bmap);
1668 if (err)
1669 goto err_name_free;
1670
1671 /* Reserve first entry for default MAC address */
1672 set_bit(0, lmac->mac_to_index_bmap.bmap);
1673
1674 lmac->rx_fc_pfvf_bmap.max = 128;
1675 err = rvu_alloc_bitmap(&lmac->rx_fc_pfvf_bmap);
1676 if (err)
1677 goto err_dmac_bmap_free;
1678
1679 lmac->tx_fc_pfvf_bmap.max = 128;
1680 err = rvu_alloc_bitmap(&lmac->tx_fc_pfvf_bmap);
1681 if (err)
1682 goto err_rx_fc_bmap_free;
1683
1684 init_waitqueue_head(&lmac->wq_cmd_cmplt);
1685 mutex_init(&lmac->cmd_lock);
1686 spin_lock_init(&lmac->event_cb_lock);
1687 err = cgx_configure_interrupt(cgx, lmac, lmac->lmac_id, false);
1688 if (err)
1689 goto err_bitmap_free;
1690
1691 /* Add reference */
1692 cgx->lmac_idmap[lmac->lmac_id] = lmac;
1693 set_bit(lmac->lmac_id, &cgx->lmac_bmap);
1694 cgx->mac_ops->mac_pause_frm_config(cgx, lmac->lmac_id, true);
1695 lmac->lmac_type = cgx->mac_ops->get_lmac_type(cgx, lmac->lmac_id);
1696 }
1697
1698 return cgx_lmac_verify_fwi_version(cgx);
1699
1700 err_bitmap_free:
1701 rvu_free_bitmap(&lmac->tx_fc_pfvf_bmap);
1702 err_rx_fc_bmap_free:
1703 rvu_free_bitmap(&lmac->rx_fc_pfvf_bmap);
1704 err_dmac_bmap_free:
1705 rvu_free_bitmap(&lmac->mac_to_index_bmap);
1706 err_name_free:
1707 kfree(lmac->name);
1708 err_lmac_free:
1709 kfree(lmac);
1710 return err;
1711 }
1712
cgx_lmac_exit(struct cgx * cgx)1713 static int cgx_lmac_exit(struct cgx *cgx)
1714 {
1715 struct lmac *lmac;
1716 int i;
1717
1718 if (cgx->cgx_cmd_workq) {
1719 destroy_workqueue(cgx->cgx_cmd_workq);
1720 cgx->cgx_cmd_workq = NULL;
1721 }
1722
1723 /* Free all lmac related resources */
1724 for_each_set_bit(i, &cgx->lmac_bmap, cgx->max_lmac_per_mac) {
1725 lmac = cgx->lmac_idmap[i];
1726 if (!lmac)
1727 continue;
1728 cgx->mac_ops->mac_pause_frm_config(cgx, lmac->lmac_id, false);
1729 cgx_configure_interrupt(cgx, lmac, lmac->lmac_id, true);
1730 kfree(lmac->mac_to_index_bmap.bmap);
1731 kfree(lmac->name);
1732 kfree(lmac);
1733 }
1734
1735 return 0;
1736 }
1737
cgx_populate_features(struct cgx * cgx)1738 static void cgx_populate_features(struct cgx *cgx)
1739 {
1740 u64 cfg;
1741
1742 cfg = cgx_read(cgx, 0, CGX_CONST);
1743 cgx->mac_ops->fifo_len = FIELD_GET(CGX_CONST_RXFIFO_SIZE, cfg);
1744 cgx->max_lmac_per_mac = FIELD_GET(CGX_CONST_MAX_LMACS, cfg);
1745
1746 if (is_dev_rpm(cgx))
1747 cgx->hw_features = (RVU_LMAC_FEAT_DMACF | RVU_MAC_RPM |
1748 RVU_LMAC_FEAT_FC | RVU_LMAC_FEAT_PTP);
1749 else
1750 cgx->hw_features = (RVU_LMAC_FEAT_FC | RVU_LMAC_FEAT_HIGIG2 |
1751 RVU_LMAC_FEAT_PTP | RVU_LMAC_FEAT_DMACF);
1752 }
1753
cgx_get_rxid_mapoffset(struct cgx * cgx)1754 static u8 cgx_get_rxid_mapoffset(struct cgx *cgx)
1755 {
1756 if (cgx->pdev->subsystem_device == PCI_SUBSYS_DEVID_CNF10KB_RPM ||
1757 is_dev_rpm2(cgx))
1758 return 0x80;
1759 else
1760 return 0x60;
1761 }
1762
1763 static struct mac_ops cgx_mac_ops = {
1764 .name = "cgx",
1765 .csr_offset = 0,
1766 .lmac_offset = 18,
1767 .int_register = CGXX_CMRX_INT,
1768 .int_set_reg = CGXX_CMRX_INT_ENA_W1S,
1769 .irq_offset = 9,
1770 .int_ena_bit = FW_CGX_INT,
1771 .lmac_fwi = CGX_LMAC_FWI,
1772 .non_contiguous_serdes_lane = false,
1773 .rx_stats_cnt = 9,
1774 .tx_stats_cnt = 18,
1775 .dmac_filter_count = 32,
1776 .get_nr_lmacs = cgx_get_nr_lmacs,
1777 .get_lmac_type = cgx_get_lmac_type,
1778 .lmac_fifo_len = cgx_get_lmac_fifo_len,
1779 .mac_lmac_intl_lbk = cgx_lmac_internal_loopback,
1780 .mac_get_rx_stats = cgx_get_rx_stats,
1781 .mac_get_tx_stats = cgx_get_tx_stats,
1782 .get_fec_stats = cgx_get_fec_stats,
1783 .mac_enadis_rx_pause_fwding = cgx_lmac_enadis_rx_pause_fwding,
1784 .mac_get_pause_frm_status = cgx_lmac_get_pause_frm_status,
1785 .mac_enadis_pause_frm = cgx_lmac_enadis_pause_frm,
1786 .mac_pause_frm_config = cgx_lmac_pause_frm_config,
1787 .mac_enadis_ptp_config = cgx_lmac_ptp_config,
1788 .mac_rx_tx_enable = cgx_lmac_rx_tx_enable,
1789 .mac_tx_enable = cgx_lmac_tx_enable,
1790 .pfc_config = cgx_lmac_pfc_config,
1791 .mac_get_pfc_frm_cfg = cgx_lmac_get_pfc_frm_cfg,
1792 .mac_reset = cgx_lmac_reset,
1793 };
1794
cgx_probe(struct pci_dev * pdev,const struct pci_device_id * id)1795 static int cgx_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1796 {
1797 struct device *dev = &pdev->dev;
1798 struct cgx *cgx;
1799 int err, nvec;
1800
1801 cgx = devm_kzalloc(dev, sizeof(*cgx), GFP_KERNEL);
1802 if (!cgx)
1803 return -ENOMEM;
1804 cgx->pdev = pdev;
1805
1806 pci_set_drvdata(pdev, cgx);
1807
1808 /* Use mac_ops to get MAC specific features */
1809 if (is_dev_rpm(cgx))
1810 cgx->mac_ops = rpm_get_mac_ops(cgx);
1811 else
1812 cgx->mac_ops = &cgx_mac_ops;
1813
1814 cgx->mac_ops->rxid_map_offset = cgx_get_rxid_mapoffset(cgx);
1815
1816 err = pci_enable_device(pdev);
1817 if (err) {
1818 dev_err(dev, "Failed to enable PCI device\n");
1819 pci_set_drvdata(pdev, NULL);
1820 return err;
1821 }
1822
1823 err = pci_request_regions(pdev, DRV_NAME);
1824 if (err) {
1825 dev_err(dev, "PCI request regions failed 0x%x\n", err);
1826 goto err_disable_device;
1827 }
1828
1829 /* MAP configuration registers */
1830 cgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
1831 if (!cgx->reg_base) {
1832 dev_err(dev, "CGX: Cannot map CSR memory space, aborting\n");
1833 err = -ENOMEM;
1834 goto err_release_regions;
1835 }
1836
1837 cgx->lmac_count = cgx->mac_ops->get_nr_lmacs(cgx);
1838 if (!cgx->lmac_count) {
1839 dev_notice(dev, "CGX %d LMAC count is zero, skipping probe\n", cgx->cgx_id);
1840 err = -EOPNOTSUPP;
1841 goto err_release_regions;
1842 }
1843
1844 nvec = pci_msix_vec_count(cgx->pdev);
1845 err = pci_alloc_irq_vectors(pdev, nvec, nvec, PCI_IRQ_MSIX);
1846 if (err < 0 || err != nvec) {
1847 dev_err(dev, "Request for %d msix vectors failed, err %d\n",
1848 nvec, err);
1849 goto err_release_regions;
1850 }
1851
1852 cgx->cgx_id = (pci_resource_start(pdev, PCI_CFG_REG_BAR_NUM) >> 24)
1853 & CGX_ID_MASK;
1854
1855 /* init wq for processing linkup requests */
1856 INIT_WORK(&cgx->cgx_cmd_work, cgx_lmac_linkup_work);
1857 cgx->cgx_cmd_workq = alloc_workqueue("cgx_cmd_workq", 0, 0);
1858 if (!cgx->cgx_cmd_workq) {
1859 dev_err(dev, "alloc workqueue failed for cgx cmd");
1860 err = -ENOMEM;
1861 goto err_free_irq_vectors;
1862 }
1863
1864 list_add(&cgx->cgx_list, &cgx_list);
1865
1866
1867 cgx_populate_features(cgx);
1868
1869 mutex_init(&cgx->lock);
1870
1871 err = cgx_lmac_init(cgx);
1872 if (err)
1873 goto err_release_lmac;
1874
1875 return 0;
1876
1877 err_release_lmac:
1878 cgx_lmac_exit(cgx);
1879 list_del(&cgx->cgx_list);
1880 err_free_irq_vectors:
1881 pci_free_irq_vectors(pdev);
1882 err_release_regions:
1883 pci_release_regions(pdev);
1884 err_disable_device:
1885 pci_disable_device(pdev);
1886 pci_set_drvdata(pdev, NULL);
1887 return err;
1888 }
1889
cgx_remove(struct pci_dev * pdev)1890 static void cgx_remove(struct pci_dev *pdev)
1891 {
1892 struct cgx *cgx = pci_get_drvdata(pdev);
1893
1894 if (cgx) {
1895 cgx_lmac_exit(cgx);
1896 list_del(&cgx->cgx_list);
1897 }
1898 pci_free_irq_vectors(pdev);
1899 pci_release_regions(pdev);
1900 pci_disable_device(pdev);
1901 pci_set_drvdata(pdev, NULL);
1902 }
1903
1904 struct pci_driver cgx_driver = {
1905 .name = DRV_NAME,
1906 .id_table = cgx_id_table,
1907 .probe = cgx_probe,
1908 .remove = cgx_remove,
1909 };
1910