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[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / cavium / thunder / thunder_bgx.c
1 /*
2 * Copyright (C) 2015 Cavium, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License
6 * as published by the Free Software Foundation.
7 */
8
9 #include <linux/acpi.h>
10 #include <linux/module.h>
11 #include <linux/interrupt.h>
12 #include <linux/pci.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.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 "nic_reg.h"
21 #include "nic.h"
22 #include "thunder_bgx.h"
23
24 #define DRV_NAME "thunder-BGX"
25 #define DRV_VERSION "1.0"
26
27 struct lmac {
28 struct bgx *bgx;
29 int dmac;
30 u8 mac[ETH_ALEN];
31 u8 lmac_type;
32 u8 lane_to_sds;
33 bool use_training;
34 bool autoneg;
35 bool link_up;
36 int lmacid; /* ID within BGX */
37 int lmacid_bd; /* ID on board */
38 struct net_device netdev;
39 struct phy_device *phydev;
40 unsigned int last_duplex;
41 unsigned int last_link;
42 unsigned int last_speed;
43 bool is_sgmii;
44 struct delayed_work dwork;
45 struct workqueue_struct *check_link;
46 };
47
48 struct bgx {
49 u8 bgx_id;
50 struct lmac lmac[MAX_LMAC_PER_BGX];
51 u8 lmac_count;
52 u8 max_lmac;
53 u8 acpi_lmac_idx;
54 void __iomem *reg_base;
55 struct pci_dev *pdev;
56 bool is_dlm;
57 bool is_rgx;
58 };
59
60 static struct bgx *bgx_vnic[MAX_BGX_THUNDER];
61 static int lmac_count; /* Total no of LMACs in system */
62
63 static int bgx_xaui_check_link(struct lmac *lmac);
64
65 /* Supported devices */
66 static const struct pci_device_id bgx_id_table[] = {
67 { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_BGX) },
68 { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_RGX) },
69 { 0, } /* end of table */
70 };
71
72 MODULE_AUTHOR("Cavium Inc");
73 MODULE_DESCRIPTION("Cavium Thunder BGX/MAC Driver");
74 MODULE_LICENSE("GPL v2");
75 MODULE_VERSION(DRV_VERSION);
76 MODULE_DEVICE_TABLE(pci, bgx_id_table);
77
78 /* The Cavium ThunderX network controller can *only* be found in SoCs
79 * containing the ThunderX ARM64 CPU implementation. All accesses to the device
80 * registers on this platform are implicitly strongly ordered with respect
81 * to memory accesses. So writeq_relaxed() and readq_relaxed() are safe to use
82 * with no memory barriers in this driver. The readq()/writeq() functions add
83 * explicit ordering operation which in this case are redundant, and only
84 * add overhead.
85 */
86
87 /* Register read/write APIs */
88 static u64 bgx_reg_read(struct bgx *bgx, u8 lmac, u64 offset)
89 {
90 void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
91
92 return readq_relaxed(addr);
93 }
94
95 static void bgx_reg_write(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
96 {
97 void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
98
99 writeq_relaxed(val, addr);
100 }
101
102 static void bgx_reg_modify(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
103 {
104 void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
105
106 writeq_relaxed(val | readq_relaxed(addr), addr);
107 }
108
109 static int bgx_poll_reg(struct bgx *bgx, u8 lmac, u64 reg, u64 mask, bool zero)
110 {
111 int timeout = 100;
112 u64 reg_val;
113
114 while (timeout) {
115 reg_val = bgx_reg_read(bgx, lmac, reg);
116 if (zero && !(reg_val & mask))
117 return 0;
118 if (!zero && (reg_val & mask))
119 return 0;
120 usleep_range(1000, 2000);
121 timeout--;
122 }
123 return 1;
124 }
125
126 static int max_bgx_per_node;
127 static void set_max_bgx_per_node(struct pci_dev *pdev)
128 {
129 u16 sdevid;
130
131 if (max_bgx_per_node)
132 return;
133
134 pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &sdevid);
135 switch (sdevid) {
136 case PCI_SUBSYS_DEVID_81XX_BGX:
137 case PCI_SUBSYS_DEVID_81XX_RGX:
138 max_bgx_per_node = MAX_BGX_PER_CN81XX;
139 break;
140 case PCI_SUBSYS_DEVID_83XX_BGX:
141 max_bgx_per_node = MAX_BGX_PER_CN83XX;
142 break;
143 case PCI_SUBSYS_DEVID_88XX_BGX:
144 default:
145 max_bgx_per_node = MAX_BGX_PER_CN88XX;
146 break;
147 }
148 }
149
150 static struct bgx *get_bgx(int node, int bgx_idx)
151 {
152 int idx = (node * max_bgx_per_node) + bgx_idx;
153
154 return bgx_vnic[idx];
155 }
156
157 /* Return number of BGX present in HW */
158 unsigned bgx_get_map(int node)
159 {
160 int i;
161 unsigned map = 0;
162
163 for (i = 0; i < max_bgx_per_node; i++) {
164 if (bgx_vnic[(node * max_bgx_per_node) + i])
165 map |= (1 << i);
166 }
167
168 return map;
169 }
170 EXPORT_SYMBOL(bgx_get_map);
171
172 /* Return number of LMAC configured for this BGX */
173 int bgx_get_lmac_count(int node, int bgx_idx)
174 {
175 struct bgx *bgx;
176
177 bgx = get_bgx(node, bgx_idx);
178 if (bgx)
179 return bgx->lmac_count;
180
181 return 0;
182 }
183 EXPORT_SYMBOL(bgx_get_lmac_count);
184
185 /* Returns the current link status of LMAC */
186 void bgx_get_lmac_link_state(int node, int bgx_idx, int lmacid, void *status)
187 {
188 struct bgx_link_status *link = (struct bgx_link_status *)status;
189 struct bgx *bgx;
190 struct lmac *lmac;
191
192 bgx = get_bgx(node, bgx_idx);
193 if (!bgx)
194 return;
195
196 lmac = &bgx->lmac[lmacid];
197 link->mac_type = lmac->lmac_type;
198 link->link_up = lmac->link_up;
199 link->duplex = lmac->last_duplex;
200 link->speed = lmac->last_speed;
201 }
202 EXPORT_SYMBOL(bgx_get_lmac_link_state);
203
204 const u8 *bgx_get_lmac_mac(int node, int bgx_idx, int lmacid)
205 {
206 struct bgx *bgx = get_bgx(node, bgx_idx);
207
208 if (bgx)
209 return bgx->lmac[lmacid].mac;
210
211 return NULL;
212 }
213 EXPORT_SYMBOL(bgx_get_lmac_mac);
214
215 void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac)
216 {
217 struct bgx *bgx = get_bgx(node, bgx_idx);
218
219 if (!bgx)
220 return;
221
222 ether_addr_copy(bgx->lmac[lmacid].mac, mac);
223 }
224 EXPORT_SYMBOL(bgx_set_lmac_mac);
225
226 void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable)
227 {
228 struct bgx *bgx = get_bgx(node, bgx_idx);
229 struct lmac *lmac;
230 u64 cfg;
231
232 if (!bgx)
233 return;
234 lmac = &bgx->lmac[lmacid];
235
236 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
237 if (enable)
238 cfg |= CMR_PKT_RX_EN | CMR_PKT_TX_EN;
239 else
240 cfg &= ~(CMR_PKT_RX_EN | CMR_PKT_TX_EN);
241 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
242
243 if (bgx->is_rgx)
244 xcv_setup_link(enable ? lmac->link_up : 0, lmac->last_speed);
245 }
246 EXPORT_SYMBOL(bgx_lmac_rx_tx_enable);
247
248 void bgx_lmac_get_pfc(int node, int bgx_idx, int lmacid, void *pause)
249 {
250 struct pfc *pfc = (struct pfc *)pause;
251 struct bgx *bgx = get_bgx(node, bgx_idx);
252 struct lmac *lmac;
253 u64 cfg;
254
255 if (!bgx)
256 return;
257 lmac = &bgx->lmac[lmacid];
258 if (lmac->is_sgmii)
259 return;
260
261 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_CBFC_CTL);
262 pfc->fc_rx = cfg & RX_EN;
263 pfc->fc_tx = cfg & TX_EN;
264 pfc->autoneg = 0;
265 }
266 EXPORT_SYMBOL(bgx_lmac_get_pfc);
267
268 void bgx_lmac_set_pfc(int node, int bgx_idx, int lmacid, void *pause)
269 {
270 struct pfc *pfc = (struct pfc *)pause;
271 struct bgx *bgx = get_bgx(node, bgx_idx);
272 struct lmac *lmac;
273 u64 cfg;
274
275 if (!bgx)
276 return;
277 lmac = &bgx->lmac[lmacid];
278 if (lmac->is_sgmii)
279 return;
280
281 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_CBFC_CTL);
282 cfg &= ~(RX_EN | TX_EN);
283 cfg |= (pfc->fc_rx ? RX_EN : 0x00);
284 cfg |= (pfc->fc_tx ? TX_EN : 0x00);
285 bgx_reg_write(bgx, lmacid, BGX_SMUX_CBFC_CTL, cfg);
286 }
287 EXPORT_SYMBOL(bgx_lmac_set_pfc);
288
289 static void bgx_sgmii_change_link_state(struct lmac *lmac)
290 {
291 struct bgx *bgx = lmac->bgx;
292 u64 cmr_cfg;
293 u64 port_cfg = 0;
294 u64 misc_ctl = 0;
295
296 cmr_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG);
297 cmr_cfg &= ~CMR_EN;
298 bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
299
300 port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);
301 misc_ctl = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL);
302
303 if (lmac->link_up) {
304 misc_ctl &= ~PCS_MISC_CTL_GMX_ENO;
305 port_cfg &= ~GMI_PORT_CFG_DUPLEX;
306 port_cfg |= (lmac->last_duplex << 2);
307 } else {
308 misc_ctl |= PCS_MISC_CTL_GMX_ENO;
309 }
310
311 switch (lmac->last_speed) {
312 case 10:
313 port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
314 port_cfg |= GMI_PORT_CFG_SPEED_MSB; /* speed_msb 1 */
315 port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
316 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
317 misc_ctl |= 50; /* samp_pt */
318 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
319 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
320 break;
321 case 100:
322 port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
323 port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
324 port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
325 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
326 misc_ctl |= 5; /* samp_pt */
327 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
328 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
329 break;
330 case 1000:
331 port_cfg |= GMI_PORT_CFG_SPEED; /* speed 1 */
332 port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
333 port_cfg |= GMI_PORT_CFG_SLOT_TIME; /* slottime 1 */
334 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
335 misc_ctl |= 1; /* samp_pt */
336 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 512);
337 if (lmac->last_duplex)
338 bgx_reg_write(bgx, lmac->lmacid,
339 BGX_GMP_GMI_TXX_BURST, 0);
340 else
341 bgx_reg_write(bgx, lmac->lmacid,
342 BGX_GMP_GMI_TXX_BURST, 8192);
343 break;
344 default:
345 break;
346 }
347 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL, misc_ctl);
348 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG, port_cfg);
349
350 port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);
351
352 /* Re-enable lmac */
353 cmr_cfg |= CMR_EN;
354 bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
355
356 if (bgx->is_rgx && (cmr_cfg & (CMR_PKT_RX_EN | CMR_PKT_TX_EN)))
357 xcv_setup_link(lmac->link_up, lmac->last_speed);
358 }
359
360 static void bgx_lmac_handler(struct net_device *netdev)
361 {
362 struct lmac *lmac = container_of(netdev, struct lmac, netdev);
363 struct phy_device *phydev;
364 int link_changed = 0;
365
366 if (!lmac)
367 return;
368
369 phydev = lmac->phydev;
370
371 if (!phydev->link && lmac->last_link)
372 link_changed = -1;
373
374 if (phydev->link &&
375 (lmac->last_duplex != phydev->duplex ||
376 lmac->last_link != phydev->link ||
377 lmac->last_speed != phydev->speed)) {
378 link_changed = 1;
379 }
380
381 lmac->last_link = phydev->link;
382 lmac->last_speed = phydev->speed;
383 lmac->last_duplex = phydev->duplex;
384
385 if (!link_changed)
386 return;
387
388 if (link_changed > 0)
389 lmac->link_up = true;
390 else
391 lmac->link_up = false;
392
393 if (lmac->is_sgmii)
394 bgx_sgmii_change_link_state(lmac);
395 else
396 bgx_xaui_check_link(lmac);
397 }
398
399 u64 bgx_get_rx_stats(int node, int bgx_idx, int lmac, int idx)
400 {
401 struct bgx *bgx;
402
403 bgx = get_bgx(node, bgx_idx);
404 if (!bgx)
405 return 0;
406
407 if (idx > 8)
408 lmac = 0;
409 return bgx_reg_read(bgx, lmac, BGX_CMRX_RX_STAT0 + (idx * 8));
410 }
411 EXPORT_SYMBOL(bgx_get_rx_stats);
412
413 u64 bgx_get_tx_stats(int node, int bgx_idx, int lmac, int idx)
414 {
415 struct bgx *bgx;
416
417 bgx = get_bgx(node, bgx_idx);
418 if (!bgx)
419 return 0;
420
421 return bgx_reg_read(bgx, lmac, BGX_CMRX_TX_STAT0 + (idx * 8));
422 }
423 EXPORT_SYMBOL(bgx_get_tx_stats);
424
425 static void bgx_flush_dmac_addrs(struct bgx *bgx, int lmac)
426 {
427 u64 offset;
428
429 while (bgx->lmac[lmac].dmac > 0) {
430 offset = ((bgx->lmac[lmac].dmac - 1) * sizeof(u64)) +
431 (lmac * MAX_DMAC_PER_LMAC * sizeof(u64));
432 bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + offset, 0);
433 bgx->lmac[lmac].dmac--;
434 }
435 }
436
437 /* Configure BGX LMAC in internal loopback mode */
438 void bgx_lmac_internal_loopback(int node, int bgx_idx,
439 int lmac_idx, bool enable)
440 {
441 struct bgx *bgx;
442 struct lmac *lmac;
443 u64 cfg;
444
445 bgx = get_bgx(node, bgx_idx);
446 if (!bgx)
447 return;
448
449 lmac = &bgx->lmac[lmac_idx];
450 if (lmac->is_sgmii) {
451 cfg = bgx_reg_read(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL);
452 if (enable)
453 cfg |= PCS_MRX_CTL_LOOPBACK1;
454 else
455 cfg &= ~PCS_MRX_CTL_LOOPBACK1;
456 bgx_reg_write(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL, cfg);
457 } else {
458 cfg = bgx_reg_read(bgx, lmac_idx, BGX_SPUX_CONTROL1);
459 if (enable)
460 cfg |= SPU_CTL_LOOPBACK;
461 else
462 cfg &= ~SPU_CTL_LOOPBACK;
463 bgx_reg_write(bgx, lmac_idx, BGX_SPUX_CONTROL1, cfg);
464 }
465 }
466 EXPORT_SYMBOL(bgx_lmac_internal_loopback);
467
468 static int bgx_lmac_sgmii_init(struct bgx *bgx, struct lmac *lmac)
469 {
470 int lmacid = lmac->lmacid;
471 u64 cfg;
472
473 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_THRESH, 0x30);
474 /* max packet size */
475 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_RXX_JABBER, MAX_FRAME_SIZE);
476
477 /* Disable frame alignment if using preamble */
478 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
479 if (cfg & 1)
480 bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_SGMII_CTL, 0);
481
482 /* Enable lmac */
483 bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
484
485 /* PCS reset */
486 bgx_reg_modify(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_RESET);
487 if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_CTL,
488 PCS_MRX_CTL_RESET, true)) {
489 dev_err(&bgx->pdev->dev, "BGX PCS reset not completed\n");
490 return -1;
491 }
492
493 /* power down, reset autoneg, autoneg enable */
494 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MRX_CTL);
495 cfg &= ~PCS_MRX_CTL_PWR_DN;
496 cfg |= PCS_MRX_CTL_RST_AN;
497 if (lmac->phydev) {
498 cfg |= PCS_MRX_CTL_AN_EN;
499 } else {
500 /* In scenarios where PHY driver is not present or it's a
501 * non-standard PHY, FW sets AN_EN to inform Linux driver
502 * to do auto-neg and link polling or not.
503 */
504 if (cfg & PCS_MRX_CTL_AN_EN)
505 lmac->autoneg = true;
506 }
507 bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, cfg);
508
509 if (lmac->lmac_type == BGX_MODE_QSGMII) {
510 /* Disable disparity check for QSGMII */
511 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MISCX_CTL);
512 cfg &= ~PCS_MISC_CTL_DISP_EN;
513 bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MISCX_CTL, cfg);
514 return 0;
515 }
516
517 if ((lmac->lmac_type == BGX_MODE_SGMII) && lmac->phydev) {
518 if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_STATUS,
519 PCS_MRX_STATUS_AN_CPT, false)) {
520 dev_err(&bgx->pdev->dev, "BGX AN_CPT not completed\n");
521 return -1;
522 }
523 }
524
525 return 0;
526 }
527
528 static int bgx_lmac_xaui_init(struct bgx *bgx, struct lmac *lmac)
529 {
530 u64 cfg;
531 int lmacid = lmac->lmacid;
532
533 /* Reset SPU */
534 bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET);
535 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
536 dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
537 return -1;
538 }
539
540 /* Disable LMAC */
541 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
542 cfg &= ~CMR_EN;
543 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
544
545 bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);
546 /* Set interleaved running disparity for RXAUI */
547 if (lmac->lmac_type == BGX_MODE_RXAUI)
548 bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL,
549 SPU_MISC_CTL_INTLV_RDISP);
550
551 /* Clear receive packet disable */
552 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_MISC_CONTROL);
553 cfg &= ~SPU_MISC_CTL_RX_DIS;
554 bgx_reg_write(bgx, lmacid, BGX_SPUX_MISC_CONTROL, cfg);
555
556 /* clear all interrupts */
557 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_INT);
558 bgx_reg_write(bgx, lmacid, BGX_SMUX_RX_INT, cfg);
559 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_INT);
560 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_INT, cfg);
561 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
562 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
563
564 if (lmac->use_training) {
565 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LP_CUP, 0x00);
566 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_CUP, 0x00);
567 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_REP, 0x00);
568 /* training enable */
569 bgx_reg_modify(bgx, lmacid,
570 BGX_SPUX_BR_PMD_CRTL, SPU_PMD_CRTL_TRAIN_EN);
571 }
572
573 /* Append FCS to each packet */
574 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, SMU_TX_APPEND_FCS_D);
575
576 /* Disable forward error correction */
577 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_FEC_CONTROL);
578 cfg &= ~SPU_FEC_CTL_FEC_EN;
579 bgx_reg_write(bgx, lmacid, BGX_SPUX_FEC_CONTROL, cfg);
580
581 /* Disable autoneg */
582 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_CONTROL);
583 cfg = cfg & ~(SPU_AN_CTL_AN_EN | SPU_AN_CTL_XNP_EN);
584 bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_CONTROL, cfg);
585
586 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_ADV);
587 if (lmac->lmac_type == BGX_MODE_10G_KR)
588 cfg |= (1 << 23);
589 else if (lmac->lmac_type == BGX_MODE_40G_KR)
590 cfg |= (1 << 24);
591 else
592 cfg &= ~((1 << 23) | (1 << 24));
593 cfg = cfg & (~((1ULL << 25) | (1ULL << 22) | (1ULL << 12)));
594 bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_ADV, cfg);
595
596 cfg = bgx_reg_read(bgx, 0, BGX_SPU_DBG_CONTROL);
597 cfg &= ~SPU_DBG_CTL_AN_ARB_LINK_CHK_EN;
598 bgx_reg_write(bgx, 0, BGX_SPU_DBG_CONTROL, cfg);
599
600 /* Enable lmac */
601 bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
602
603 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_CONTROL1);
604 cfg &= ~SPU_CTL_LOW_POWER;
605 bgx_reg_write(bgx, lmacid, BGX_SPUX_CONTROL1, cfg);
606
607 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_CTL);
608 cfg &= ~SMU_TX_CTL_UNI_EN;
609 cfg |= SMU_TX_CTL_DIC_EN;
610 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_CTL, cfg);
611
612 /* Enable receive and transmission of pause frames */
613 bgx_reg_write(bgx, lmacid, BGX_SMUX_CBFC_CTL, ((0xffffULL << 32) |
614 BCK_EN | DRP_EN | TX_EN | RX_EN));
615 /* Configure pause time and interval */
616 bgx_reg_write(bgx, lmacid,
617 BGX_SMUX_TX_PAUSE_PKT_TIME, DEFAULT_PAUSE_TIME);
618 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_PAUSE_PKT_INTERVAL);
619 cfg &= ~0xFFFFull;
620 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_PAUSE_PKT_INTERVAL,
621 cfg | (DEFAULT_PAUSE_TIME - 0x1000));
622 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_PAUSE_ZERO, 0x01);
623
624 /* take lmac_count into account */
625 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_THRESH, (0x100 - 1));
626 /* max packet size */
627 bgx_reg_modify(bgx, lmacid, BGX_SMUX_RX_JABBER, MAX_FRAME_SIZE);
628
629 return 0;
630 }
631
632 static int bgx_xaui_check_link(struct lmac *lmac)
633 {
634 struct bgx *bgx = lmac->bgx;
635 int lmacid = lmac->lmacid;
636 int lmac_type = lmac->lmac_type;
637 u64 cfg;
638
639 if (lmac->use_training) {
640 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
641 if (!(cfg & (1ull << 13))) {
642 cfg = (1ull << 13) | (1ull << 14);
643 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
644 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL);
645 cfg |= (1ull << 0);
646 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL, cfg);
647 return -1;
648 }
649 }
650
651 /* wait for PCS to come out of reset */
652 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
653 dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
654 return -1;
655 }
656
657 if ((lmac_type == BGX_MODE_10G_KR) || (lmac_type == BGX_MODE_XFI) ||
658 (lmac_type == BGX_MODE_40G_KR) || (lmac_type == BGX_MODE_XLAUI)) {
659 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BR_STATUS1,
660 SPU_BR_STATUS_BLK_LOCK, false)) {
661 dev_err(&bgx->pdev->dev,
662 "SPU_BR_STATUS_BLK_LOCK not completed\n");
663 return -1;
664 }
665 } else {
666 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BX_STATUS,
667 SPU_BX_STATUS_RX_ALIGN, false)) {
668 dev_err(&bgx->pdev->dev,
669 "SPU_BX_STATUS_RX_ALIGN not completed\n");
670 return -1;
671 }
672 }
673
674 /* Clear rcvflt bit (latching high) and read it back */
675 if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT)
676 bgx_reg_modify(bgx, lmacid,
677 BGX_SPUX_STATUS2, SPU_STATUS2_RCVFLT);
678 if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) {
679 dev_err(&bgx->pdev->dev, "Receive fault, retry training\n");
680 if (lmac->use_training) {
681 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
682 if (!(cfg & (1ull << 13))) {
683 cfg = (1ull << 13) | (1ull << 14);
684 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
685 cfg = bgx_reg_read(bgx, lmacid,
686 BGX_SPUX_BR_PMD_CRTL);
687 cfg |= (1ull << 0);
688 bgx_reg_write(bgx, lmacid,
689 BGX_SPUX_BR_PMD_CRTL, cfg);
690 return -1;
691 }
692 }
693 return -1;
694 }
695
696 /* Wait for BGX RX to be idle */
697 if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_RX_IDLE, false)) {
698 dev_err(&bgx->pdev->dev, "SMU RX not idle\n");
699 return -1;
700 }
701
702 /* Wait for BGX TX to be idle */
703 if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_TX_IDLE, false)) {
704 dev_err(&bgx->pdev->dev, "SMU TX not idle\n");
705 return -1;
706 }
707
708 /* Check for MAC RX faults */
709 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_CTL);
710 /* 0 - Link is okay, 1 - Local fault, 2 - Remote fault */
711 cfg &= SMU_RX_CTL_STATUS;
712 if (!cfg)
713 return 0;
714
715 /* Rx local/remote fault seen.
716 * Do lmac reinit to see if condition recovers
717 */
718 bgx_lmac_xaui_init(bgx, lmac);
719
720 return -1;
721 }
722
723 static void bgx_poll_for_sgmii_link(struct lmac *lmac)
724 {
725 u64 pcs_link, an_result;
726 u8 speed;
727
728 pcs_link = bgx_reg_read(lmac->bgx, lmac->lmacid,
729 BGX_GMP_PCS_MRX_STATUS);
730
731 /*Link state bit is sticky, read it again*/
732 if (!(pcs_link & PCS_MRX_STATUS_LINK))
733 pcs_link = bgx_reg_read(lmac->bgx, lmac->lmacid,
734 BGX_GMP_PCS_MRX_STATUS);
735
736 if (bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_GMP_PCS_MRX_STATUS,
737 PCS_MRX_STATUS_AN_CPT, false)) {
738 lmac->link_up = false;
739 lmac->last_speed = SPEED_UNKNOWN;
740 lmac->last_duplex = DUPLEX_UNKNOWN;
741 goto next_poll;
742 }
743
744 lmac->link_up = ((pcs_link & PCS_MRX_STATUS_LINK) != 0) ? true : false;
745 an_result = bgx_reg_read(lmac->bgx, lmac->lmacid,
746 BGX_GMP_PCS_ANX_AN_RESULTS);
747
748 speed = (an_result >> 3) & 0x3;
749 lmac->last_duplex = (an_result >> 1) & 0x1;
750 switch (speed) {
751 case 0:
752 lmac->last_speed = 10;
753 break;
754 case 1:
755 lmac->last_speed = 100;
756 break;
757 case 2:
758 lmac->last_speed = 1000;
759 break;
760 default:
761 lmac->link_up = false;
762 lmac->last_speed = SPEED_UNKNOWN;
763 lmac->last_duplex = DUPLEX_UNKNOWN;
764 break;
765 }
766
767 next_poll:
768
769 if (lmac->last_link != lmac->link_up) {
770 if (lmac->link_up)
771 bgx_sgmii_change_link_state(lmac);
772 lmac->last_link = lmac->link_up;
773 }
774
775 queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 3);
776 }
777
778 static void bgx_poll_for_link(struct work_struct *work)
779 {
780 struct lmac *lmac;
781 u64 spu_link, smu_link;
782
783 lmac = container_of(work, struct lmac, dwork.work);
784 if (lmac->is_sgmii) {
785 bgx_poll_for_sgmii_link(lmac);
786 return;
787 }
788
789 /* Receive link is latching low. Force it high and verify it */
790 bgx_reg_modify(lmac->bgx, lmac->lmacid,
791 BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK);
792 bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1,
793 SPU_STATUS1_RCV_LNK, false);
794
795 spu_link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1);
796 smu_link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SMUX_RX_CTL);
797
798 if ((spu_link & SPU_STATUS1_RCV_LNK) &&
799 !(smu_link & SMU_RX_CTL_STATUS)) {
800 lmac->link_up = 1;
801 if (lmac->lmac_type == BGX_MODE_XLAUI)
802 lmac->last_speed = 40000;
803 else
804 lmac->last_speed = 10000;
805 lmac->last_duplex = 1;
806 } else {
807 lmac->link_up = 0;
808 lmac->last_speed = SPEED_UNKNOWN;
809 lmac->last_duplex = DUPLEX_UNKNOWN;
810 }
811
812 if (lmac->last_link != lmac->link_up) {
813 if (lmac->link_up) {
814 if (bgx_xaui_check_link(lmac)) {
815 /* Errors, clear link_up state */
816 lmac->link_up = 0;
817 lmac->last_speed = SPEED_UNKNOWN;
818 lmac->last_duplex = DUPLEX_UNKNOWN;
819 }
820 }
821 lmac->last_link = lmac->link_up;
822 }
823
824 queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 2);
825 }
826
827 static int phy_interface_mode(u8 lmac_type)
828 {
829 if (lmac_type == BGX_MODE_QSGMII)
830 return PHY_INTERFACE_MODE_QSGMII;
831 if (lmac_type == BGX_MODE_RGMII)
832 return PHY_INTERFACE_MODE_RGMII;
833
834 return PHY_INTERFACE_MODE_SGMII;
835 }
836
837 static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
838 {
839 struct lmac *lmac;
840 u64 cfg;
841
842 lmac = &bgx->lmac[lmacid];
843 lmac->bgx = bgx;
844
845 if ((lmac->lmac_type == BGX_MODE_SGMII) ||
846 (lmac->lmac_type == BGX_MODE_QSGMII) ||
847 (lmac->lmac_type == BGX_MODE_RGMII)) {
848 lmac->is_sgmii = 1;
849 if (bgx_lmac_sgmii_init(bgx, lmac))
850 return -1;
851 } else {
852 lmac->is_sgmii = 0;
853 if (bgx_lmac_xaui_init(bgx, lmac))
854 return -1;
855 }
856
857 if (lmac->is_sgmii) {
858 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
859 cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
860 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND, cfg);
861 bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_MIN_PKT, 60 - 1);
862 } else {
863 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_APPEND);
864 cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
865 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, cfg);
866 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_MIN_PKT, 60 + 4);
867 }
868
869 /* Enable lmac */
870 bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
871
872 /* Restore default cfg, incase low level firmware changed it */
873 bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, 0x03);
874
875 if ((lmac->lmac_type != BGX_MODE_XFI) &&
876 (lmac->lmac_type != BGX_MODE_XLAUI) &&
877 (lmac->lmac_type != BGX_MODE_40G_KR) &&
878 (lmac->lmac_type != BGX_MODE_10G_KR)) {
879 if (!lmac->phydev) {
880 if (lmac->autoneg) {
881 bgx_reg_write(bgx, lmacid,
882 BGX_GMP_PCS_LINKX_TIMER,
883 PCS_LINKX_TIMER_COUNT);
884 goto poll;
885 } else {
886 /* Default to below link speed and duplex */
887 lmac->link_up = true;
888 lmac->last_speed = 1000;
889 lmac->last_duplex = 1;
890 bgx_sgmii_change_link_state(lmac);
891 return 0;
892 }
893 }
894 lmac->phydev->dev_flags = 0;
895
896 if (phy_connect_direct(&lmac->netdev, lmac->phydev,
897 bgx_lmac_handler,
898 phy_interface_mode(lmac->lmac_type)))
899 return -ENODEV;
900
901 phy_start_aneg(lmac->phydev);
902 return 0;
903 }
904
905 poll:
906 lmac->check_link = alloc_workqueue("check_link", WQ_UNBOUND |
907 WQ_MEM_RECLAIM, 1);
908 if (!lmac->check_link)
909 return -ENOMEM;
910 INIT_DELAYED_WORK(&lmac->dwork, bgx_poll_for_link);
911 queue_delayed_work(lmac->check_link, &lmac->dwork, 0);
912
913 return 0;
914 }
915
916 static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)
917 {
918 struct lmac *lmac;
919 u64 cfg;
920
921 lmac = &bgx->lmac[lmacid];
922 if (lmac->check_link) {
923 /* Destroy work queue */
924 cancel_delayed_work_sync(&lmac->dwork);
925 destroy_workqueue(lmac->check_link);
926 }
927
928 /* Disable packet reception */
929 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
930 cfg &= ~CMR_PKT_RX_EN;
931 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
932
933 /* Give chance for Rx/Tx FIFO to get drained */
934 bgx_poll_reg(bgx, lmacid, BGX_CMRX_RX_FIFO_LEN, (u64)0x1FFF, true);
935 bgx_poll_reg(bgx, lmacid, BGX_CMRX_TX_FIFO_LEN, (u64)0x3FFF, true);
936
937 /* Disable packet transmission */
938 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
939 cfg &= ~CMR_PKT_TX_EN;
940 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
941
942 /* Disable serdes lanes */
943 if (!lmac->is_sgmii)
944 bgx_reg_modify(bgx, lmacid,
945 BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);
946 else
947 bgx_reg_modify(bgx, lmacid,
948 BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_PWR_DN);
949
950 /* Disable LMAC */
951 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
952 cfg &= ~CMR_EN;
953 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
954
955 bgx_flush_dmac_addrs(bgx, lmacid);
956
957 if ((lmac->lmac_type != BGX_MODE_XFI) &&
958 (lmac->lmac_type != BGX_MODE_XLAUI) &&
959 (lmac->lmac_type != BGX_MODE_40G_KR) &&
960 (lmac->lmac_type != BGX_MODE_10G_KR) && lmac->phydev)
961 phy_disconnect(lmac->phydev);
962
963 lmac->phydev = NULL;
964 }
965
966 static void bgx_init_hw(struct bgx *bgx)
967 {
968 int i;
969 struct lmac *lmac;
970
971 bgx_reg_modify(bgx, 0, BGX_CMR_GLOBAL_CFG, CMR_GLOBAL_CFG_FCS_STRIP);
972 if (bgx_reg_read(bgx, 0, BGX_CMR_BIST_STATUS))
973 dev_err(&bgx->pdev->dev, "BGX%d BIST failed\n", bgx->bgx_id);
974
975 /* Set lmac type and lane2serdes mapping */
976 for (i = 0; i < bgx->lmac_count; i++) {
977 lmac = &bgx->lmac[i];
978 bgx_reg_write(bgx, i, BGX_CMRX_CFG,
979 (lmac->lmac_type << 8) | lmac->lane_to_sds);
980 bgx->lmac[i].lmacid_bd = lmac_count;
981 lmac_count++;
982 }
983
984 bgx_reg_write(bgx, 0, BGX_CMR_TX_LMACS, bgx->lmac_count);
985 bgx_reg_write(bgx, 0, BGX_CMR_RX_LMACS, bgx->lmac_count);
986
987 /* Set the backpressure AND mask */
988 for (i = 0; i < bgx->lmac_count; i++)
989 bgx_reg_modify(bgx, 0, BGX_CMR_CHAN_MSK_AND,
990 ((1ULL << MAX_BGX_CHANS_PER_LMAC) - 1) <<
991 (i * MAX_BGX_CHANS_PER_LMAC));
992
993 /* Disable all MAC filtering */
994 for (i = 0; i < RX_DMAC_COUNT; i++)
995 bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + (i * 8), 0x00);
996
997 /* Disable MAC steering (NCSI traffic) */
998 for (i = 0; i < RX_TRAFFIC_STEER_RULE_COUNT; i++)
999 bgx_reg_write(bgx, 0, BGX_CMR_RX_STREERING + (i * 8), 0x00);
1000 }
1001
1002 static u8 bgx_get_lane2sds_cfg(struct bgx *bgx, struct lmac *lmac)
1003 {
1004 return (u8)(bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG) & 0xFF);
1005 }
1006
1007 static void bgx_print_qlm_mode(struct bgx *bgx, u8 lmacid)
1008 {
1009 struct device *dev = &bgx->pdev->dev;
1010 struct lmac *lmac;
1011 char str[20];
1012
1013 if (!bgx->is_dlm && lmacid)
1014 return;
1015
1016 lmac = &bgx->lmac[lmacid];
1017 if (!bgx->is_dlm)
1018 sprintf(str, "BGX%d QLM mode", bgx->bgx_id);
1019 else
1020 sprintf(str, "BGX%d LMAC%d mode", bgx->bgx_id, lmacid);
1021
1022 switch (lmac->lmac_type) {
1023 case BGX_MODE_SGMII:
1024 dev_info(dev, "%s: SGMII\n", (char *)str);
1025 break;
1026 case BGX_MODE_XAUI:
1027 dev_info(dev, "%s: XAUI\n", (char *)str);
1028 break;
1029 case BGX_MODE_RXAUI:
1030 dev_info(dev, "%s: RXAUI\n", (char *)str);
1031 break;
1032 case BGX_MODE_XFI:
1033 if (!lmac->use_training)
1034 dev_info(dev, "%s: XFI\n", (char *)str);
1035 else
1036 dev_info(dev, "%s: 10G_KR\n", (char *)str);
1037 break;
1038 case BGX_MODE_XLAUI:
1039 if (!lmac->use_training)
1040 dev_info(dev, "%s: XLAUI\n", (char *)str);
1041 else
1042 dev_info(dev, "%s: 40G_KR4\n", (char *)str);
1043 break;
1044 case BGX_MODE_QSGMII:
1045 dev_info(dev, "%s: QSGMII\n", (char *)str);
1046 break;
1047 case BGX_MODE_RGMII:
1048 dev_info(dev, "%s: RGMII\n", (char *)str);
1049 break;
1050 case BGX_MODE_INVALID:
1051 /* Nothing to do */
1052 break;
1053 }
1054 }
1055
1056 static void lmac_set_lane2sds(struct bgx *bgx, struct lmac *lmac)
1057 {
1058 switch (lmac->lmac_type) {
1059 case BGX_MODE_SGMII:
1060 case BGX_MODE_XFI:
1061 lmac->lane_to_sds = lmac->lmacid;
1062 break;
1063 case BGX_MODE_XAUI:
1064 case BGX_MODE_XLAUI:
1065 case BGX_MODE_RGMII:
1066 lmac->lane_to_sds = 0xE4;
1067 break;
1068 case BGX_MODE_RXAUI:
1069 lmac->lane_to_sds = (lmac->lmacid) ? 0xE : 0x4;
1070 break;
1071 case BGX_MODE_QSGMII:
1072 /* There is no way to determine if DLM0/2 is QSGMII or
1073 * DLM1/3 is configured to QSGMII as bootloader will
1074 * configure all LMACs, so take whatever is configured
1075 * by low level firmware.
1076 */
1077 lmac->lane_to_sds = bgx_get_lane2sds_cfg(bgx, lmac);
1078 break;
1079 default:
1080 lmac->lane_to_sds = 0;
1081 break;
1082 }
1083 }
1084
1085 static void lmac_set_training(struct bgx *bgx, struct lmac *lmac, int lmacid)
1086 {
1087 if ((lmac->lmac_type != BGX_MODE_10G_KR) &&
1088 (lmac->lmac_type != BGX_MODE_40G_KR)) {
1089 lmac->use_training = 0;
1090 return;
1091 }
1092
1093 lmac->use_training = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL) &
1094 SPU_PMD_CRTL_TRAIN_EN;
1095 }
1096
1097 static void bgx_set_lmac_config(struct bgx *bgx, u8 idx)
1098 {
1099 struct lmac *lmac;
1100 u64 cmr_cfg;
1101 u8 lmac_type;
1102 u8 lane_to_sds;
1103
1104 lmac = &bgx->lmac[idx];
1105
1106 if (!bgx->is_dlm || bgx->is_rgx) {
1107 /* Read LMAC0 type to figure out QLM mode
1108 * This is configured by low level firmware
1109 */
1110 cmr_cfg = bgx_reg_read(bgx, 0, BGX_CMRX_CFG);
1111 lmac->lmac_type = (cmr_cfg >> 8) & 0x07;
1112 if (bgx->is_rgx)
1113 lmac->lmac_type = BGX_MODE_RGMII;
1114 lmac_set_training(bgx, lmac, 0);
1115 lmac_set_lane2sds(bgx, lmac);
1116 return;
1117 }
1118
1119 /* For DLMs or SLMs on 80/81/83xx so many lane configurations
1120 * are possible and vary across boards. Also Kernel doesn't have
1121 * any way to identify board type/info and since firmware does,
1122 * just take lmac type and serdes lane config as is.
1123 */
1124 cmr_cfg = bgx_reg_read(bgx, idx, BGX_CMRX_CFG);
1125 lmac_type = (u8)((cmr_cfg >> 8) & 0x07);
1126 lane_to_sds = (u8)(cmr_cfg & 0xFF);
1127 /* Check if config is reset value */
1128 if ((lmac_type == 0) && (lane_to_sds == 0xE4))
1129 lmac->lmac_type = BGX_MODE_INVALID;
1130 else
1131 lmac->lmac_type = lmac_type;
1132 lmac->lane_to_sds = lane_to_sds;
1133 lmac_set_training(bgx, lmac, lmac->lmacid);
1134 }
1135
1136 static void bgx_get_qlm_mode(struct bgx *bgx)
1137 {
1138 struct lmac *lmac;
1139 u8 idx;
1140
1141 /* Init all LMAC's type to invalid */
1142 for (idx = 0; idx < bgx->max_lmac; idx++) {
1143 lmac = &bgx->lmac[idx];
1144 lmac->lmacid = idx;
1145 lmac->lmac_type = BGX_MODE_INVALID;
1146 lmac->use_training = false;
1147 }
1148
1149 /* It is assumed that low level firmware sets this value */
1150 bgx->lmac_count = bgx_reg_read(bgx, 0, BGX_CMR_RX_LMACS) & 0x7;
1151 if (bgx->lmac_count > bgx->max_lmac)
1152 bgx->lmac_count = bgx->max_lmac;
1153
1154 for (idx = 0; idx < bgx->lmac_count; idx++) {
1155 bgx_set_lmac_config(bgx, idx);
1156 bgx_print_qlm_mode(bgx, idx);
1157 }
1158 }
1159
1160 #ifdef CONFIG_ACPI
1161
1162 static int acpi_get_mac_address(struct device *dev, struct acpi_device *adev,
1163 u8 *dst)
1164 {
1165 u8 mac[ETH_ALEN];
1166 int ret;
1167
1168 ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev),
1169 "mac-address", mac, ETH_ALEN);
1170 if (ret)
1171 goto out;
1172
1173 if (!is_valid_ether_addr(mac)) {
1174 dev_err(dev, "MAC address invalid: %pM\n", mac);
1175 ret = -EINVAL;
1176 goto out;
1177 }
1178
1179 dev_info(dev, "MAC address set to: %pM\n", mac);
1180
1181 memcpy(dst, mac, ETH_ALEN);
1182 out:
1183 return ret;
1184 }
1185
1186 /* Currently only sets the MAC address. */
1187 static acpi_status bgx_acpi_register_phy(acpi_handle handle,
1188 u32 lvl, void *context, void **rv)
1189 {
1190 struct bgx *bgx = context;
1191 struct device *dev = &bgx->pdev->dev;
1192 struct acpi_device *adev;
1193
1194 if (acpi_bus_get_device(handle, &adev))
1195 goto out;
1196
1197 acpi_get_mac_address(dev, adev, bgx->lmac[bgx->acpi_lmac_idx].mac);
1198
1199 SET_NETDEV_DEV(&bgx->lmac[bgx->acpi_lmac_idx].netdev, dev);
1200
1201 bgx->lmac[bgx->acpi_lmac_idx].lmacid = bgx->acpi_lmac_idx;
1202 bgx->acpi_lmac_idx++; /* move to next LMAC */
1203 out:
1204 return AE_OK;
1205 }
1206
1207 static acpi_status bgx_acpi_match_id(acpi_handle handle, u32 lvl,
1208 void *context, void **ret_val)
1209 {
1210 struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
1211 struct bgx *bgx = context;
1212 char bgx_sel[5];
1213
1214 snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id);
1215 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &string))) {
1216 pr_warn("Invalid link device\n");
1217 return AE_OK;
1218 }
1219
1220 if (strncmp(string.pointer, bgx_sel, 4))
1221 return AE_OK;
1222
1223 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
1224 bgx_acpi_register_phy, NULL, bgx, NULL);
1225
1226 kfree(string.pointer);
1227 return AE_CTRL_TERMINATE;
1228 }
1229
1230 static int bgx_init_acpi_phy(struct bgx *bgx)
1231 {
1232 acpi_get_devices(NULL, bgx_acpi_match_id, bgx, (void **)NULL);
1233 return 0;
1234 }
1235
1236 #else
1237
1238 static int bgx_init_acpi_phy(struct bgx *bgx)
1239 {
1240 return -ENODEV;
1241 }
1242
1243 #endif /* CONFIG_ACPI */
1244
1245 #if IS_ENABLED(CONFIG_OF_MDIO)
1246
1247 static int bgx_init_of_phy(struct bgx *bgx)
1248 {
1249 struct fwnode_handle *fwn;
1250 struct device_node *node = NULL;
1251 u8 lmac = 0;
1252
1253 device_for_each_child_node(&bgx->pdev->dev, fwn) {
1254 struct phy_device *pd;
1255 struct device_node *phy_np;
1256 const char *mac;
1257
1258 /* Should always be an OF node. But if it is not, we
1259 * cannot handle it, so exit the loop.
1260 */
1261 node = to_of_node(fwn);
1262 if (!node)
1263 break;
1264
1265 mac = of_get_mac_address(node);
1266 if (mac)
1267 ether_addr_copy(bgx->lmac[lmac].mac, mac);
1268
1269 SET_NETDEV_DEV(&bgx->lmac[lmac].netdev, &bgx->pdev->dev);
1270 bgx->lmac[lmac].lmacid = lmac;
1271
1272 phy_np = of_parse_phandle(node, "phy-handle", 0);
1273 /* If there is no phy or defective firmware presents
1274 * this cortina phy, for which there is no driver
1275 * support, ignore it.
1276 */
1277 if (phy_np &&
1278 !of_device_is_compatible(phy_np, "cortina,cs4223-slice")) {
1279 /* Wait until the phy drivers are available */
1280 pd = of_phy_find_device(phy_np);
1281 if (!pd)
1282 goto defer;
1283 bgx->lmac[lmac].phydev = pd;
1284 }
1285
1286 lmac++;
1287 if (lmac == bgx->max_lmac) {
1288 of_node_put(node);
1289 break;
1290 }
1291 }
1292 return 0;
1293
1294 defer:
1295 /* We are bailing out, try not to leak device reference counts
1296 * for phy devices we may have already found.
1297 */
1298 while (lmac) {
1299 if (bgx->lmac[lmac].phydev) {
1300 put_device(&bgx->lmac[lmac].phydev->mdio.dev);
1301 bgx->lmac[lmac].phydev = NULL;
1302 }
1303 lmac--;
1304 }
1305 of_node_put(node);
1306 return -EPROBE_DEFER;
1307 }
1308
1309 #else
1310
1311 static int bgx_init_of_phy(struct bgx *bgx)
1312 {
1313 return -ENODEV;
1314 }
1315
1316 #endif /* CONFIG_OF_MDIO */
1317
1318 static int bgx_init_phy(struct bgx *bgx)
1319 {
1320 if (!acpi_disabled)
1321 return bgx_init_acpi_phy(bgx);
1322
1323 return bgx_init_of_phy(bgx);
1324 }
1325
1326 static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1327 {
1328 int err;
1329 struct device *dev = &pdev->dev;
1330 struct bgx *bgx = NULL;
1331 u8 lmac;
1332 u16 sdevid;
1333
1334 bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL);
1335 if (!bgx)
1336 return -ENOMEM;
1337 bgx->pdev = pdev;
1338
1339 pci_set_drvdata(pdev, bgx);
1340
1341 err = pci_enable_device(pdev);
1342 if (err) {
1343 dev_err(dev, "Failed to enable PCI device\n");
1344 pci_set_drvdata(pdev, NULL);
1345 return err;
1346 }
1347
1348 err = pci_request_regions(pdev, DRV_NAME);
1349 if (err) {
1350 dev_err(dev, "PCI request regions failed 0x%x\n", err);
1351 goto err_disable_device;
1352 }
1353
1354 /* MAP configuration registers */
1355 bgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
1356 if (!bgx->reg_base) {
1357 dev_err(dev, "BGX: Cannot map CSR memory space, aborting\n");
1358 err = -ENOMEM;
1359 goto err_release_regions;
1360 }
1361
1362 set_max_bgx_per_node(pdev);
1363
1364 pci_read_config_word(pdev, PCI_DEVICE_ID, &sdevid);
1365 if (sdevid != PCI_DEVICE_ID_THUNDER_RGX) {
1366 bgx->bgx_id = (pci_resource_start(pdev,
1367 PCI_CFG_REG_BAR_NUM) >> 24) & BGX_ID_MASK;
1368 bgx->bgx_id += nic_get_node_id(pdev) * max_bgx_per_node;
1369 bgx->max_lmac = MAX_LMAC_PER_BGX;
1370 bgx_vnic[bgx->bgx_id] = bgx;
1371 } else {
1372 bgx->is_rgx = true;
1373 bgx->max_lmac = 1;
1374 bgx->bgx_id = MAX_BGX_PER_CN81XX - 1;
1375 bgx_vnic[bgx->bgx_id] = bgx;
1376 xcv_init_hw();
1377 }
1378
1379 /* On 81xx all are DLMs and on 83xx there are 3 BGX QLMs and one
1380 * BGX i.e BGX2 can be split across 2 DLMs.
1381 */
1382 pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &sdevid);
1383 if ((sdevid == PCI_SUBSYS_DEVID_81XX_BGX) ||
1384 ((sdevid == PCI_SUBSYS_DEVID_83XX_BGX) && (bgx->bgx_id == 2)))
1385 bgx->is_dlm = true;
1386
1387 bgx_get_qlm_mode(bgx);
1388
1389 err = bgx_init_phy(bgx);
1390 if (err)
1391 goto err_enable;
1392
1393 bgx_init_hw(bgx);
1394
1395 /* Enable all LMACs */
1396 for (lmac = 0; lmac < bgx->lmac_count; lmac++) {
1397 err = bgx_lmac_enable(bgx, lmac);
1398 if (err) {
1399 dev_err(dev, "BGX%d failed to enable lmac%d\n",
1400 bgx->bgx_id, lmac);
1401 while (lmac)
1402 bgx_lmac_disable(bgx, --lmac);
1403 goto err_enable;
1404 }
1405 }
1406
1407 return 0;
1408
1409 err_enable:
1410 bgx_vnic[bgx->bgx_id] = NULL;
1411 err_release_regions:
1412 pci_release_regions(pdev);
1413 err_disable_device:
1414 pci_disable_device(pdev);
1415 pci_set_drvdata(pdev, NULL);
1416 return err;
1417 }
1418
1419 static void bgx_remove(struct pci_dev *pdev)
1420 {
1421 struct bgx *bgx = pci_get_drvdata(pdev);
1422 u8 lmac;
1423
1424 /* Disable all LMACs */
1425 for (lmac = 0; lmac < bgx->lmac_count; lmac++)
1426 bgx_lmac_disable(bgx, lmac);
1427
1428 bgx_vnic[bgx->bgx_id] = NULL;
1429 pci_release_regions(pdev);
1430 pci_disable_device(pdev);
1431 pci_set_drvdata(pdev, NULL);
1432 }
1433
1434 static struct pci_driver bgx_driver = {
1435 .name = DRV_NAME,
1436 .id_table = bgx_id_table,
1437 .probe = bgx_probe,
1438 .remove = bgx_remove,
1439 };
1440
1441 static int __init bgx_init_module(void)
1442 {
1443 pr_info("%s, ver %s\n", DRV_NAME, DRV_VERSION);
1444
1445 return pci_register_driver(&bgx_driver);
1446 }
1447
1448 static void __exit bgx_cleanup_module(void)
1449 {
1450 pci_unregister_driver(&bgx_driver);
1451 }
1452
1453 module_init(bgx_init_module);
1454 module_exit(bgx_cleanup_module);
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