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Merge remote-tracking branch 'ftrace/for-next'
[deliverable/linux.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 link_up;
35 int lmacid; /* ID within BGX */
36 int lmacid_bd; /* ID on board */
37 struct net_device netdev;
38 struct phy_device *phydev;
39 unsigned int last_duplex;
40 unsigned int last_link;
41 unsigned int last_speed;
42 bool is_sgmii;
43 struct delayed_work dwork;
44 struct workqueue_struct *check_link;
45 };
46
47 struct bgx {
48 u8 bgx_id;
49 struct lmac lmac[MAX_LMAC_PER_BGX];
50 int lmac_count;
51 u8 max_lmac;
52 void __iomem *reg_base;
53 struct pci_dev *pdev;
54 bool is_dlm;
55 bool is_rgx;
56 };
57
58 static struct bgx *bgx_vnic[MAX_BGX_THUNDER];
59 static int lmac_count; /* Total no of LMACs in system */
60
61 static int bgx_xaui_check_link(struct lmac *lmac);
62
63 /* Supported devices */
64 static const struct pci_device_id bgx_id_table[] = {
65 { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_BGX) },
66 { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_RGX) },
67 { 0, } /* end of table */
68 };
69
70 MODULE_AUTHOR("Cavium Inc");
71 MODULE_DESCRIPTION("Cavium Thunder BGX/MAC Driver");
72 MODULE_LICENSE("GPL v2");
73 MODULE_VERSION(DRV_VERSION);
74 MODULE_DEVICE_TABLE(pci, bgx_id_table);
75
76 /* The Cavium ThunderX network controller can *only* be found in SoCs
77 * containing the ThunderX ARM64 CPU implementation. All accesses to the device
78 * registers on this platform are implicitly strongly ordered with respect
79 * to memory accesses. So writeq_relaxed() and readq_relaxed() are safe to use
80 * with no memory barriers in this driver. The readq()/writeq() functions add
81 * explicit ordering operation which in this case are redundant, and only
82 * add overhead.
83 */
84
85 /* Register read/write APIs */
86 static u64 bgx_reg_read(struct bgx *bgx, u8 lmac, u64 offset)
87 {
88 void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
89
90 return readq_relaxed(addr);
91 }
92
93 static void bgx_reg_write(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
94 {
95 void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
96
97 writeq_relaxed(val, addr);
98 }
99
100 static void bgx_reg_modify(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
101 {
102 void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
103
104 writeq_relaxed(val | readq_relaxed(addr), addr);
105 }
106
107 static int bgx_poll_reg(struct bgx *bgx, u8 lmac, u64 reg, u64 mask, bool zero)
108 {
109 int timeout = 100;
110 u64 reg_val;
111
112 while (timeout) {
113 reg_val = bgx_reg_read(bgx, lmac, reg);
114 if (zero && !(reg_val & mask))
115 return 0;
116 if (!zero && (reg_val & mask))
117 return 0;
118 usleep_range(1000, 2000);
119 timeout--;
120 }
121 return 1;
122 }
123
124 /* Return number of BGX present in HW */
125 unsigned bgx_get_map(int node)
126 {
127 int i;
128 unsigned map = 0;
129
130 for (i = 0; i < MAX_BGX_PER_NODE; i++) {
131 if (bgx_vnic[(node * MAX_BGX_PER_NODE) + i])
132 map |= (1 << i);
133 }
134
135 return map;
136 }
137 EXPORT_SYMBOL(bgx_get_map);
138
139 /* Return number of LMAC configured for this BGX */
140 int bgx_get_lmac_count(int node, int bgx_idx)
141 {
142 struct bgx *bgx;
143
144 bgx = bgx_vnic[(node * MAX_BGX_PER_NODE) + bgx_idx];
145 if (bgx)
146 return bgx->lmac_count;
147
148 return 0;
149 }
150 EXPORT_SYMBOL(bgx_get_lmac_count);
151
152 /* Returns the current link status of LMAC */
153 void bgx_get_lmac_link_state(int node, int bgx_idx, int lmacid, void *status)
154 {
155 struct bgx_link_status *link = (struct bgx_link_status *)status;
156 struct bgx *bgx;
157 struct lmac *lmac;
158
159 bgx = bgx_vnic[(node * MAX_BGX_PER_NODE) + bgx_idx];
160 if (!bgx)
161 return;
162
163 lmac = &bgx->lmac[lmacid];
164 link->link_up = lmac->link_up;
165 link->duplex = lmac->last_duplex;
166 link->speed = lmac->last_speed;
167 }
168 EXPORT_SYMBOL(bgx_get_lmac_link_state);
169
170 const u8 *bgx_get_lmac_mac(int node, int bgx_idx, int lmacid)
171 {
172 struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_NODE) + bgx_idx];
173
174 if (bgx)
175 return bgx->lmac[lmacid].mac;
176
177 return NULL;
178 }
179 EXPORT_SYMBOL(bgx_get_lmac_mac);
180
181 void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac)
182 {
183 struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_NODE) + bgx_idx];
184
185 if (!bgx)
186 return;
187
188 ether_addr_copy(bgx->lmac[lmacid].mac, mac);
189 }
190 EXPORT_SYMBOL(bgx_set_lmac_mac);
191
192 void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable)
193 {
194 struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_NODE) + bgx_idx];
195 struct lmac *lmac;
196 u64 cfg;
197
198 if (!bgx)
199 return;
200 lmac = &bgx->lmac[lmacid];
201
202 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
203 if (enable)
204 cfg |= CMR_PKT_RX_EN | CMR_PKT_TX_EN;
205 else
206 cfg &= ~(CMR_PKT_RX_EN | CMR_PKT_TX_EN);
207 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
208
209 if (bgx->is_rgx)
210 xcv_setup_link(enable ? lmac->link_up : 0, lmac->last_speed);
211 }
212 EXPORT_SYMBOL(bgx_lmac_rx_tx_enable);
213
214 static void bgx_sgmii_change_link_state(struct lmac *lmac)
215 {
216 struct bgx *bgx = lmac->bgx;
217 u64 cmr_cfg;
218 u64 port_cfg = 0;
219 u64 misc_ctl = 0;
220
221 cmr_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG);
222 cmr_cfg &= ~CMR_EN;
223 bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
224
225 port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);
226 misc_ctl = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL);
227
228 if (lmac->link_up) {
229 misc_ctl &= ~PCS_MISC_CTL_GMX_ENO;
230 port_cfg &= ~GMI_PORT_CFG_DUPLEX;
231 port_cfg |= (lmac->last_duplex << 2);
232 } else {
233 misc_ctl |= PCS_MISC_CTL_GMX_ENO;
234 }
235
236 switch (lmac->last_speed) {
237 case 10:
238 port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
239 port_cfg |= GMI_PORT_CFG_SPEED_MSB; /* speed_msb 1 */
240 port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
241 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
242 misc_ctl |= 50; /* samp_pt */
243 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
244 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
245 break;
246 case 100:
247 port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
248 port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
249 port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
250 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
251 misc_ctl |= 5; /* samp_pt */
252 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
253 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
254 break;
255 case 1000:
256 port_cfg |= GMI_PORT_CFG_SPEED; /* speed 1 */
257 port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
258 port_cfg |= GMI_PORT_CFG_SLOT_TIME; /* slottime 1 */
259 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
260 misc_ctl |= 1; /* samp_pt */
261 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 512);
262 if (lmac->last_duplex)
263 bgx_reg_write(bgx, lmac->lmacid,
264 BGX_GMP_GMI_TXX_BURST, 0);
265 else
266 bgx_reg_write(bgx, lmac->lmacid,
267 BGX_GMP_GMI_TXX_BURST, 8192);
268 break;
269 default:
270 break;
271 }
272 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL, misc_ctl);
273 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG, port_cfg);
274
275 port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);
276
277 /* Re-enable lmac */
278 cmr_cfg |= CMR_EN;
279 bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
280
281 if (bgx->is_rgx && (cmr_cfg & (CMR_PKT_RX_EN | CMR_PKT_TX_EN)))
282 xcv_setup_link(lmac->link_up, lmac->last_speed);
283 }
284
285 static void bgx_lmac_handler(struct net_device *netdev)
286 {
287 struct lmac *lmac = container_of(netdev, struct lmac, netdev);
288 struct phy_device *phydev;
289 int link_changed = 0;
290
291 if (!lmac)
292 return;
293
294 phydev = lmac->phydev;
295
296 if (!phydev->link && lmac->last_link)
297 link_changed = -1;
298
299 if (phydev->link &&
300 (lmac->last_duplex != phydev->duplex ||
301 lmac->last_link != phydev->link ||
302 lmac->last_speed != phydev->speed)) {
303 link_changed = 1;
304 }
305
306 lmac->last_link = phydev->link;
307 lmac->last_speed = phydev->speed;
308 lmac->last_duplex = phydev->duplex;
309
310 if (!link_changed)
311 return;
312
313 if (link_changed > 0)
314 lmac->link_up = true;
315 else
316 lmac->link_up = false;
317
318 if (lmac->is_sgmii)
319 bgx_sgmii_change_link_state(lmac);
320 else
321 bgx_xaui_check_link(lmac);
322 }
323
324 u64 bgx_get_rx_stats(int node, int bgx_idx, int lmac, int idx)
325 {
326 struct bgx *bgx;
327
328 bgx = bgx_vnic[(node * MAX_BGX_PER_NODE) + bgx_idx];
329 if (!bgx)
330 return 0;
331
332 if (idx > 8)
333 lmac = 0;
334 return bgx_reg_read(bgx, lmac, BGX_CMRX_RX_STAT0 + (idx * 8));
335 }
336 EXPORT_SYMBOL(bgx_get_rx_stats);
337
338 u64 bgx_get_tx_stats(int node, int bgx_idx, int lmac, int idx)
339 {
340 struct bgx *bgx;
341
342 bgx = bgx_vnic[(node * MAX_BGX_PER_NODE) + bgx_idx];
343 if (!bgx)
344 return 0;
345
346 return bgx_reg_read(bgx, lmac, BGX_CMRX_TX_STAT0 + (idx * 8));
347 }
348 EXPORT_SYMBOL(bgx_get_tx_stats);
349
350 static void bgx_flush_dmac_addrs(struct bgx *bgx, int lmac)
351 {
352 u64 offset;
353
354 while (bgx->lmac[lmac].dmac > 0) {
355 offset = ((bgx->lmac[lmac].dmac - 1) * sizeof(u64)) +
356 (lmac * MAX_DMAC_PER_LMAC * sizeof(u64));
357 bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + offset, 0);
358 bgx->lmac[lmac].dmac--;
359 }
360 }
361
362 /* Configure BGX LMAC in internal loopback mode */
363 void bgx_lmac_internal_loopback(int node, int bgx_idx,
364 int lmac_idx, bool enable)
365 {
366 struct bgx *bgx;
367 struct lmac *lmac;
368 u64 cfg;
369
370 bgx = bgx_vnic[(node * MAX_BGX_PER_NODE) + bgx_idx];
371 if (!bgx)
372 return;
373
374 lmac = &bgx->lmac[lmac_idx];
375 if (lmac->is_sgmii) {
376 cfg = bgx_reg_read(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL);
377 if (enable)
378 cfg |= PCS_MRX_CTL_LOOPBACK1;
379 else
380 cfg &= ~PCS_MRX_CTL_LOOPBACK1;
381 bgx_reg_write(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL, cfg);
382 } else {
383 cfg = bgx_reg_read(bgx, lmac_idx, BGX_SPUX_CONTROL1);
384 if (enable)
385 cfg |= SPU_CTL_LOOPBACK;
386 else
387 cfg &= ~SPU_CTL_LOOPBACK;
388 bgx_reg_write(bgx, lmac_idx, BGX_SPUX_CONTROL1, cfg);
389 }
390 }
391 EXPORT_SYMBOL(bgx_lmac_internal_loopback);
392
393 static int bgx_lmac_sgmii_init(struct bgx *bgx, struct lmac *lmac)
394 {
395 int lmacid = lmac->lmacid;
396 u64 cfg;
397
398 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_THRESH, 0x30);
399 /* max packet size */
400 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_RXX_JABBER, MAX_FRAME_SIZE);
401
402 /* Disable frame alignment if using preamble */
403 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
404 if (cfg & 1)
405 bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_SGMII_CTL, 0);
406
407 /* Enable lmac */
408 bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
409
410 /* PCS reset */
411 bgx_reg_modify(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_RESET);
412 if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_CTL,
413 PCS_MRX_CTL_RESET, true)) {
414 dev_err(&bgx->pdev->dev, "BGX PCS reset not completed\n");
415 return -1;
416 }
417
418 /* power down, reset autoneg, autoneg enable */
419 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MRX_CTL);
420 cfg &= ~PCS_MRX_CTL_PWR_DN;
421 cfg |= (PCS_MRX_CTL_RST_AN | PCS_MRX_CTL_AN_EN);
422 bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, cfg);
423
424 if (lmac->lmac_type == BGX_MODE_QSGMII) {
425 /* Disable disparity check for QSGMII */
426 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MISCX_CTL);
427 cfg &= ~PCS_MISC_CTL_DISP_EN;
428 bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MISCX_CTL, cfg);
429 return 0;
430 }
431
432 if (lmac->lmac_type == BGX_MODE_SGMII) {
433 if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_STATUS,
434 PCS_MRX_STATUS_AN_CPT, false)) {
435 dev_err(&bgx->pdev->dev, "BGX AN_CPT not completed\n");
436 return -1;
437 }
438 }
439
440 return 0;
441 }
442
443 static int bgx_lmac_xaui_init(struct bgx *bgx, struct lmac *lmac)
444 {
445 u64 cfg;
446 int lmacid = lmac->lmacid;
447
448 /* Reset SPU */
449 bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET);
450 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
451 dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
452 return -1;
453 }
454
455 /* Disable LMAC */
456 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
457 cfg &= ~CMR_EN;
458 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
459
460 bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);
461 /* Set interleaved running disparity for RXAUI */
462 if (lmac->lmac_type == BGX_MODE_RXAUI)
463 bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL,
464 SPU_MISC_CTL_INTLV_RDISP);
465
466 /* Clear receive packet disable */
467 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_MISC_CONTROL);
468 cfg &= ~SPU_MISC_CTL_RX_DIS;
469 bgx_reg_write(bgx, lmacid, BGX_SPUX_MISC_CONTROL, cfg);
470
471 /* clear all interrupts */
472 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_INT);
473 bgx_reg_write(bgx, lmacid, BGX_SMUX_RX_INT, cfg);
474 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_INT);
475 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_INT, cfg);
476 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
477 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
478
479 if (lmac->use_training) {
480 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LP_CUP, 0x00);
481 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_CUP, 0x00);
482 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_REP, 0x00);
483 /* training enable */
484 bgx_reg_modify(bgx, lmacid,
485 BGX_SPUX_BR_PMD_CRTL, SPU_PMD_CRTL_TRAIN_EN);
486 }
487
488 /* Append FCS to each packet */
489 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, SMU_TX_APPEND_FCS_D);
490
491 /* Disable forward error correction */
492 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_FEC_CONTROL);
493 cfg &= ~SPU_FEC_CTL_FEC_EN;
494 bgx_reg_write(bgx, lmacid, BGX_SPUX_FEC_CONTROL, cfg);
495
496 /* Disable autoneg */
497 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_CONTROL);
498 cfg = cfg & ~(SPU_AN_CTL_AN_EN | SPU_AN_CTL_XNP_EN);
499 bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_CONTROL, cfg);
500
501 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_ADV);
502 if (lmac->lmac_type == BGX_MODE_10G_KR)
503 cfg |= (1 << 23);
504 else if (lmac->lmac_type == BGX_MODE_40G_KR)
505 cfg |= (1 << 24);
506 else
507 cfg &= ~((1 << 23) | (1 << 24));
508 cfg = cfg & (~((1ULL << 25) | (1ULL << 22) | (1ULL << 12)));
509 bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_ADV, cfg);
510
511 cfg = bgx_reg_read(bgx, 0, BGX_SPU_DBG_CONTROL);
512 cfg &= ~SPU_DBG_CTL_AN_ARB_LINK_CHK_EN;
513 bgx_reg_write(bgx, 0, BGX_SPU_DBG_CONTROL, cfg);
514
515 /* Enable lmac */
516 bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
517
518 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_CONTROL1);
519 cfg &= ~SPU_CTL_LOW_POWER;
520 bgx_reg_write(bgx, lmacid, BGX_SPUX_CONTROL1, cfg);
521
522 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_CTL);
523 cfg &= ~SMU_TX_CTL_UNI_EN;
524 cfg |= SMU_TX_CTL_DIC_EN;
525 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_CTL, cfg);
526
527 /* take lmac_count into account */
528 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_THRESH, (0x100 - 1));
529 /* max packet size */
530 bgx_reg_modify(bgx, lmacid, BGX_SMUX_RX_JABBER, MAX_FRAME_SIZE);
531
532 return 0;
533 }
534
535 static int bgx_xaui_check_link(struct lmac *lmac)
536 {
537 struct bgx *bgx = lmac->bgx;
538 int lmacid = lmac->lmacid;
539 int lmac_type = lmac->lmac_type;
540 u64 cfg;
541
542 if (lmac->use_training) {
543 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
544 if (!(cfg & (1ull << 13))) {
545 cfg = (1ull << 13) | (1ull << 14);
546 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
547 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL);
548 cfg |= (1ull << 0);
549 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL, cfg);
550 return -1;
551 }
552 }
553
554 /* wait for PCS to come out of reset */
555 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
556 dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
557 return -1;
558 }
559
560 if ((lmac_type == BGX_MODE_10G_KR) || (lmac_type == BGX_MODE_XFI) ||
561 (lmac_type == BGX_MODE_40G_KR) || (lmac_type == BGX_MODE_XLAUI)) {
562 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BR_STATUS1,
563 SPU_BR_STATUS_BLK_LOCK, false)) {
564 dev_err(&bgx->pdev->dev,
565 "SPU_BR_STATUS_BLK_LOCK not completed\n");
566 return -1;
567 }
568 } else {
569 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BX_STATUS,
570 SPU_BX_STATUS_RX_ALIGN, false)) {
571 dev_err(&bgx->pdev->dev,
572 "SPU_BX_STATUS_RX_ALIGN not completed\n");
573 return -1;
574 }
575 }
576
577 /* Clear rcvflt bit (latching high) and read it back */
578 if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT)
579 bgx_reg_modify(bgx, lmacid,
580 BGX_SPUX_STATUS2, SPU_STATUS2_RCVFLT);
581 if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) {
582 dev_err(&bgx->pdev->dev, "Receive fault, retry training\n");
583 if (lmac->use_training) {
584 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
585 if (!(cfg & (1ull << 13))) {
586 cfg = (1ull << 13) | (1ull << 14);
587 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
588 cfg = bgx_reg_read(bgx, lmacid,
589 BGX_SPUX_BR_PMD_CRTL);
590 cfg |= (1ull << 0);
591 bgx_reg_write(bgx, lmacid,
592 BGX_SPUX_BR_PMD_CRTL, cfg);
593 return -1;
594 }
595 }
596 return -1;
597 }
598
599 /* Wait for BGX RX to be idle */
600 if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_RX_IDLE, false)) {
601 dev_err(&bgx->pdev->dev, "SMU RX not idle\n");
602 return -1;
603 }
604
605 /* Wait for BGX TX to be idle */
606 if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_TX_IDLE, false)) {
607 dev_err(&bgx->pdev->dev, "SMU TX not idle\n");
608 return -1;
609 }
610
611 /* Check for MAC RX faults */
612 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_CTL);
613 /* 0 - Link is okay, 1 - Local fault, 2 - Remote fault */
614 cfg &= SMU_RX_CTL_STATUS;
615 if (!cfg)
616 return 0;
617
618 /* Rx local/remote fault seen.
619 * Do lmac reinit to see if condition recovers
620 */
621 bgx_lmac_xaui_init(bgx, lmac);
622
623 return -1;
624 }
625
626 static void bgx_poll_for_link(struct work_struct *work)
627 {
628 struct lmac *lmac;
629 u64 spu_link, smu_link;
630
631 lmac = container_of(work, struct lmac, dwork.work);
632
633 /* Receive link is latching low. Force it high and verify it */
634 bgx_reg_modify(lmac->bgx, lmac->lmacid,
635 BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK);
636 bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1,
637 SPU_STATUS1_RCV_LNK, false);
638
639 spu_link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1);
640 smu_link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SMUX_RX_CTL);
641
642 if ((spu_link & SPU_STATUS1_RCV_LNK) &&
643 !(smu_link & SMU_RX_CTL_STATUS)) {
644 lmac->link_up = 1;
645 if (lmac->lmac_type == BGX_MODE_XLAUI)
646 lmac->last_speed = 40000;
647 else
648 lmac->last_speed = 10000;
649 lmac->last_duplex = 1;
650 } else {
651 lmac->link_up = 0;
652 lmac->last_speed = SPEED_UNKNOWN;
653 lmac->last_duplex = DUPLEX_UNKNOWN;
654 }
655
656 if (lmac->last_link != lmac->link_up) {
657 if (lmac->link_up) {
658 if (bgx_xaui_check_link(lmac)) {
659 /* Errors, clear link_up state */
660 lmac->link_up = 0;
661 lmac->last_speed = SPEED_UNKNOWN;
662 lmac->last_duplex = DUPLEX_UNKNOWN;
663 }
664 }
665 lmac->last_link = lmac->link_up;
666 }
667
668 queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 2);
669 }
670
671 static int phy_interface_mode(u8 lmac_type)
672 {
673 if (lmac_type == BGX_MODE_QSGMII)
674 return PHY_INTERFACE_MODE_QSGMII;
675 if (lmac_type == BGX_MODE_RGMII)
676 return PHY_INTERFACE_MODE_RGMII;
677
678 return PHY_INTERFACE_MODE_SGMII;
679 }
680
681 static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
682 {
683 struct lmac *lmac;
684 u64 cfg;
685
686 lmac = &bgx->lmac[lmacid];
687 lmac->bgx = bgx;
688
689 if ((lmac->lmac_type == BGX_MODE_SGMII) ||
690 (lmac->lmac_type == BGX_MODE_QSGMII) ||
691 (lmac->lmac_type == BGX_MODE_RGMII)) {
692 lmac->is_sgmii = 1;
693 if (bgx_lmac_sgmii_init(bgx, lmac))
694 return -1;
695 } else {
696 lmac->is_sgmii = 0;
697 if (bgx_lmac_xaui_init(bgx, lmac))
698 return -1;
699 }
700
701 if (lmac->is_sgmii) {
702 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
703 cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
704 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND, cfg);
705 bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_MIN_PKT, 60 - 1);
706 } else {
707 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_APPEND);
708 cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
709 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, cfg);
710 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_MIN_PKT, 60 + 4);
711 }
712
713 /* Enable lmac */
714 bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
715
716 /* Restore default cfg, incase low level firmware changed it */
717 bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, 0x03);
718
719 if ((lmac->lmac_type != BGX_MODE_XFI) &&
720 (lmac->lmac_type != BGX_MODE_XLAUI) &&
721 (lmac->lmac_type != BGX_MODE_40G_KR) &&
722 (lmac->lmac_type != BGX_MODE_10G_KR)) {
723 if (!lmac->phydev)
724 return -ENODEV;
725
726 lmac->phydev->dev_flags = 0;
727
728 if (phy_connect_direct(&lmac->netdev, lmac->phydev,
729 bgx_lmac_handler,
730 phy_interface_mode(lmac->lmac_type)))
731 return -ENODEV;
732
733 phy_start_aneg(lmac->phydev);
734 } else {
735 lmac->check_link = alloc_workqueue("check_link", WQ_UNBOUND |
736 WQ_MEM_RECLAIM, 1);
737 if (!lmac->check_link)
738 return -ENOMEM;
739 INIT_DELAYED_WORK(&lmac->dwork, bgx_poll_for_link);
740 queue_delayed_work(lmac->check_link, &lmac->dwork, 0);
741 }
742
743 return 0;
744 }
745
746 static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)
747 {
748 struct lmac *lmac;
749 u64 cfg;
750
751 lmac = &bgx->lmac[lmacid];
752 if (lmac->check_link) {
753 /* Destroy work queue */
754 cancel_delayed_work_sync(&lmac->dwork);
755 destroy_workqueue(lmac->check_link);
756 }
757
758 /* Disable packet reception */
759 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
760 cfg &= ~CMR_PKT_RX_EN;
761 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
762
763 /* Give chance for Rx/Tx FIFO to get drained */
764 bgx_poll_reg(bgx, lmacid, BGX_CMRX_RX_FIFO_LEN, (u64)0x1FFF, true);
765 bgx_poll_reg(bgx, lmacid, BGX_CMRX_TX_FIFO_LEN, (u64)0x3FFF, true);
766
767 /* Disable packet transmission */
768 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
769 cfg &= ~CMR_PKT_TX_EN;
770 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
771
772 /* Disable serdes lanes */
773 if (!lmac->is_sgmii)
774 bgx_reg_modify(bgx, lmacid,
775 BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);
776 else
777 bgx_reg_modify(bgx, lmacid,
778 BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_PWR_DN);
779
780 /* Disable LMAC */
781 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
782 cfg &= ~CMR_EN;
783 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
784
785 bgx_flush_dmac_addrs(bgx, lmacid);
786
787 if ((lmac->lmac_type != BGX_MODE_XFI) &&
788 (lmac->lmac_type != BGX_MODE_XLAUI) &&
789 (lmac->lmac_type != BGX_MODE_40G_KR) &&
790 (lmac->lmac_type != BGX_MODE_10G_KR) && lmac->phydev)
791 phy_disconnect(lmac->phydev);
792
793 lmac->phydev = NULL;
794 }
795
796 static void bgx_init_hw(struct bgx *bgx)
797 {
798 int i;
799 struct lmac *lmac;
800
801 bgx_reg_modify(bgx, 0, BGX_CMR_GLOBAL_CFG, CMR_GLOBAL_CFG_FCS_STRIP);
802 if (bgx_reg_read(bgx, 0, BGX_CMR_BIST_STATUS))
803 dev_err(&bgx->pdev->dev, "BGX%d BIST failed\n", bgx->bgx_id);
804
805 /* Set lmac type and lane2serdes mapping */
806 for (i = 0; i < bgx->lmac_count; i++) {
807 lmac = &bgx->lmac[i];
808 bgx_reg_write(bgx, i, BGX_CMRX_CFG,
809 (lmac->lmac_type << 8) | lmac->lane_to_sds);
810 bgx->lmac[i].lmacid_bd = lmac_count;
811 lmac_count++;
812 }
813
814 bgx_reg_write(bgx, 0, BGX_CMR_TX_LMACS, bgx->lmac_count);
815 bgx_reg_write(bgx, 0, BGX_CMR_RX_LMACS, bgx->lmac_count);
816
817 /* Set the backpressure AND mask */
818 for (i = 0; i < bgx->lmac_count; i++)
819 bgx_reg_modify(bgx, 0, BGX_CMR_CHAN_MSK_AND,
820 ((1ULL << MAX_BGX_CHANS_PER_LMAC) - 1) <<
821 (i * MAX_BGX_CHANS_PER_LMAC));
822
823 /* Disable all MAC filtering */
824 for (i = 0; i < RX_DMAC_COUNT; i++)
825 bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + (i * 8), 0x00);
826
827 /* Disable MAC steering (NCSI traffic) */
828 for (i = 0; i < RX_TRAFFIC_STEER_RULE_COUNT; i++)
829 bgx_reg_write(bgx, 0, BGX_CMR_RX_STREERING + (i * 8), 0x00);
830 }
831
832 static u8 bgx_get_lane2sds_cfg(struct bgx *bgx, struct lmac *lmac)
833 {
834 return (u8)(bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG) & 0xFF);
835 }
836
837 static void bgx_print_qlm_mode(struct bgx *bgx, u8 lmacid)
838 {
839 struct device *dev = &bgx->pdev->dev;
840 struct lmac *lmac;
841 char str[20];
842 u8 dlm;
843
844 if (lmacid > bgx->max_lmac)
845 return;
846
847 lmac = &bgx->lmac[lmacid];
848 dlm = (lmacid / 2) + (bgx->bgx_id * 2);
849 if (!bgx->is_dlm)
850 sprintf(str, "BGX%d QLM mode", bgx->bgx_id);
851 else
852 sprintf(str, "BGX%d DLM%d mode", bgx->bgx_id, dlm);
853
854 switch (lmac->lmac_type) {
855 case BGX_MODE_SGMII:
856 dev_info(dev, "%s: SGMII\n", (char *)str);
857 break;
858 case BGX_MODE_XAUI:
859 dev_info(dev, "%s: XAUI\n", (char *)str);
860 break;
861 case BGX_MODE_RXAUI:
862 dev_info(dev, "%s: RXAUI\n", (char *)str);
863 break;
864 case BGX_MODE_XFI:
865 if (!lmac->use_training)
866 dev_info(dev, "%s: XFI\n", (char *)str);
867 else
868 dev_info(dev, "%s: 10G_KR\n", (char *)str);
869 break;
870 case BGX_MODE_XLAUI:
871 if (!lmac->use_training)
872 dev_info(dev, "%s: XLAUI\n", (char *)str);
873 else
874 dev_info(dev, "%s: 40G_KR4\n", (char *)str);
875 break;
876 case BGX_MODE_QSGMII:
877 if ((lmacid == 0) &&
878 (bgx_get_lane2sds_cfg(bgx, lmac) != lmacid))
879 return;
880 if ((lmacid == 2) &&
881 (bgx_get_lane2sds_cfg(bgx, lmac) == lmacid))
882 return;
883 dev_info(dev, "%s: QSGMII\n", (char *)str);
884 break;
885 case BGX_MODE_RGMII:
886 dev_info(dev, "%s: RGMII\n", (char *)str);
887 break;
888 case BGX_MODE_INVALID:
889 /* Nothing to do */
890 break;
891 }
892 }
893
894 static void lmac_set_lane2sds(struct bgx *bgx, struct lmac *lmac)
895 {
896 switch (lmac->lmac_type) {
897 case BGX_MODE_SGMII:
898 case BGX_MODE_XFI:
899 lmac->lane_to_sds = lmac->lmacid;
900 break;
901 case BGX_MODE_XAUI:
902 case BGX_MODE_XLAUI:
903 case BGX_MODE_RGMII:
904 lmac->lane_to_sds = 0xE4;
905 break;
906 case BGX_MODE_RXAUI:
907 lmac->lane_to_sds = (lmac->lmacid) ? 0xE : 0x4;
908 break;
909 case BGX_MODE_QSGMII:
910 /* There is no way to determine if DLM0/2 is QSGMII or
911 * DLM1/3 is configured to QSGMII as bootloader will
912 * configure all LMACs, so take whatever is configured
913 * by low level firmware.
914 */
915 lmac->lane_to_sds = bgx_get_lane2sds_cfg(bgx, lmac);
916 break;
917 default:
918 lmac->lane_to_sds = 0;
919 break;
920 }
921 }
922
923 static void lmac_set_training(struct bgx *bgx, struct lmac *lmac, int lmacid)
924 {
925 if ((lmac->lmac_type != BGX_MODE_10G_KR) &&
926 (lmac->lmac_type != BGX_MODE_40G_KR)) {
927 lmac->use_training = 0;
928 return;
929 }
930
931 lmac->use_training = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL) &
932 SPU_PMD_CRTL_TRAIN_EN;
933 }
934
935 static void bgx_set_lmac_config(struct bgx *bgx, u8 idx)
936 {
937 struct lmac *lmac;
938 struct lmac *olmac;
939 u64 cmr_cfg;
940 u8 lmac_type;
941 u8 lane_to_sds;
942
943 lmac = &bgx->lmac[idx];
944
945 if (!bgx->is_dlm || bgx->is_rgx) {
946 /* Read LMAC0 type to figure out QLM mode
947 * This is configured by low level firmware
948 */
949 cmr_cfg = bgx_reg_read(bgx, 0, BGX_CMRX_CFG);
950 lmac->lmac_type = (cmr_cfg >> 8) & 0x07;
951 if (bgx->is_rgx)
952 lmac->lmac_type = BGX_MODE_RGMII;
953 lmac_set_training(bgx, lmac, 0);
954 lmac_set_lane2sds(bgx, lmac);
955 return;
956 }
957
958 /* On 81xx BGX can be split across 2 DLMs
959 * firmware programs lmac_type of LMAC0 and LMAC2
960 */
961 if ((idx == 0) || (idx == 2)) {
962 cmr_cfg = bgx_reg_read(bgx, idx, BGX_CMRX_CFG);
963 lmac_type = (u8)((cmr_cfg >> 8) & 0x07);
964 lane_to_sds = (u8)(cmr_cfg & 0xFF);
965 /* Check if config is not reset value */
966 if ((lmac_type == 0) && (lane_to_sds == 0xE4))
967 lmac->lmac_type = BGX_MODE_INVALID;
968 else
969 lmac->lmac_type = lmac_type;
970 lmac_set_training(bgx, lmac, lmac->lmacid);
971 lmac_set_lane2sds(bgx, lmac);
972
973 /* Set LMAC type of other lmac on same DLM i.e LMAC 1/3 */
974 olmac = &bgx->lmac[idx + 1];
975 olmac->lmac_type = lmac->lmac_type;
976 lmac_set_training(bgx, olmac, olmac->lmacid);
977 lmac_set_lane2sds(bgx, olmac);
978 }
979 }
980
981 static bool is_dlm0_in_bgx_mode(struct bgx *bgx)
982 {
983 struct lmac *lmac;
984
985 if (!bgx->is_dlm)
986 return true;
987
988 lmac = &bgx->lmac[0];
989 if (lmac->lmac_type == BGX_MODE_INVALID)
990 return false;
991
992 return true;
993 }
994
995 static void bgx_get_qlm_mode(struct bgx *bgx)
996 {
997 struct lmac *lmac;
998 struct lmac *lmac01;
999 struct lmac *lmac23;
1000 u8 idx;
1001
1002 /* Init all LMAC's type to invalid */
1003 for (idx = 0; idx < bgx->max_lmac; idx++) {
1004 lmac = &bgx->lmac[idx];
1005 lmac->lmacid = idx;
1006 lmac->lmac_type = BGX_MODE_INVALID;
1007 lmac->use_training = false;
1008 }
1009
1010 /* It is assumed that low level firmware sets this value */
1011 bgx->lmac_count = bgx_reg_read(bgx, 0, BGX_CMR_RX_LMACS) & 0x7;
1012 if (bgx->lmac_count > bgx->max_lmac)
1013 bgx->lmac_count = bgx->max_lmac;
1014
1015 for (idx = 0; idx < bgx->max_lmac; idx++)
1016 bgx_set_lmac_config(bgx, idx);
1017
1018 if (!bgx->is_dlm || bgx->is_rgx) {
1019 bgx_print_qlm_mode(bgx, 0);
1020 return;
1021 }
1022
1023 if (bgx->lmac_count) {
1024 bgx_print_qlm_mode(bgx, 0);
1025 bgx_print_qlm_mode(bgx, 2);
1026 }
1027
1028 /* If DLM0 is not in BGX mode then LMAC0/1 have
1029 * to be configured with serdes lanes of DLM1
1030 */
1031 if (is_dlm0_in_bgx_mode(bgx) || (bgx->lmac_count > 2))
1032 return;
1033 for (idx = 0; idx < bgx->lmac_count; idx++) {
1034 lmac01 = &bgx->lmac[idx];
1035 lmac23 = &bgx->lmac[idx + 2];
1036 lmac01->lmac_type = lmac23->lmac_type;
1037 lmac01->lane_to_sds = lmac23->lane_to_sds;
1038 }
1039 }
1040
1041 #ifdef CONFIG_ACPI
1042
1043 static int acpi_get_mac_address(struct device *dev, struct acpi_device *adev,
1044 u8 *dst)
1045 {
1046 u8 mac[ETH_ALEN];
1047 int ret;
1048
1049 ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev),
1050 "mac-address", mac, ETH_ALEN);
1051 if (ret)
1052 goto out;
1053
1054 if (!is_valid_ether_addr(mac)) {
1055 dev_err(dev, "MAC address invalid: %pM\n", mac);
1056 ret = -EINVAL;
1057 goto out;
1058 }
1059
1060 dev_info(dev, "MAC address set to: %pM\n", mac);
1061
1062 memcpy(dst, mac, ETH_ALEN);
1063 out:
1064 return ret;
1065 }
1066
1067 /* Currently only sets the MAC address. */
1068 static acpi_status bgx_acpi_register_phy(acpi_handle handle,
1069 u32 lvl, void *context, void **rv)
1070 {
1071 struct bgx *bgx = context;
1072 struct device *dev = &bgx->pdev->dev;
1073 struct acpi_device *adev;
1074
1075 if (acpi_bus_get_device(handle, &adev))
1076 goto out;
1077
1078 acpi_get_mac_address(dev, adev, bgx->lmac[bgx->lmac_count].mac);
1079
1080 SET_NETDEV_DEV(&bgx->lmac[bgx->lmac_count].netdev, dev);
1081
1082 bgx->lmac[bgx->lmac_count].lmacid = bgx->lmac_count;
1083 out:
1084 bgx->lmac_count++;
1085 return AE_OK;
1086 }
1087
1088 static acpi_status bgx_acpi_match_id(acpi_handle handle, u32 lvl,
1089 void *context, void **ret_val)
1090 {
1091 struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
1092 struct bgx *bgx = context;
1093 char bgx_sel[5];
1094
1095 snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id);
1096 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &string))) {
1097 pr_warn("Invalid link device\n");
1098 return AE_OK;
1099 }
1100
1101 if (strncmp(string.pointer, bgx_sel, 4))
1102 return AE_OK;
1103
1104 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
1105 bgx_acpi_register_phy, NULL, bgx, NULL);
1106
1107 kfree(string.pointer);
1108 return AE_CTRL_TERMINATE;
1109 }
1110
1111 static int bgx_init_acpi_phy(struct bgx *bgx)
1112 {
1113 acpi_get_devices(NULL, bgx_acpi_match_id, bgx, (void **)NULL);
1114 return 0;
1115 }
1116
1117 #else
1118
1119 static int bgx_init_acpi_phy(struct bgx *bgx)
1120 {
1121 return -ENODEV;
1122 }
1123
1124 #endif /* CONFIG_ACPI */
1125
1126 #if IS_ENABLED(CONFIG_OF_MDIO)
1127
1128 static int bgx_init_of_phy(struct bgx *bgx)
1129 {
1130 struct fwnode_handle *fwn;
1131 struct device_node *node = NULL;
1132 u8 lmac = 0;
1133
1134 device_for_each_child_node(&bgx->pdev->dev, fwn) {
1135 struct phy_device *pd;
1136 struct device_node *phy_np;
1137 const char *mac;
1138
1139 /* Should always be an OF node. But if it is not, we
1140 * cannot handle it, so exit the loop.
1141 */
1142 node = to_of_node(fwn);
1143 if (!node)
1144 break;
1145
1146 mac = of_get_mac_address(node);
1147 if (mac)
1148 ether_addr_copy(bgx->lmac[lmac].mac, mac);
1149
1150 SET_NETDEV_DEV(&bgx->lmac[lmac].netdev, &bgx->pdev->dev);
1151 bgx->lmac[lmac].lmacid = lmac;
1152
1153 phy_np = of_parse_phandle(node, "phy-handle", 0);
1154 /* If there is no phy or defective firmware presents
1155 * this cortina phy, for which there is no driver
1156 * support, ignore it.
1157 */
1158 if (phy_np &&
1159 !of_device_is_compatible(phy_np, "cortina,cs4223-slice")) {
1160 /* Wait until the phy drivers are available */
1161 pd = of_phy_find_device(phy_np);
1162 if (!pd)
1163 goto defer;
1164 bgx->lmac[lmac].phydev = pd;
1165 }
1166
1167 lmac++;
1168 if (lmac == bgx->max_lmac) {
1169 of_node_put(node);
1170 break;
1171 }
1172 }
1173 return 0;
1174
1175 defer:
1176 /* We are bailing out, try not to leak device reference counts
1177 * for phy devices we may have already found.
1178 */
1179 while (lmac) {
1180 if (bgx->lmac[lmac].phydev) {
1181 put_device(&bgx->lmac[lmac].phydev->mdio.dev);
1182 bgx->lmac[lmac].phydev = NULL;
1183 }
1184 lmac--;
1185 }
1186 of_node_put(node);
1187 return -EPROBE_DEFER;
1188 }
1189
1190 #else
1191
1192 static int bgx_init_of_phy(struct bgx *bgx)
1193 {
1194 return -ENODEV;
1195 }
1196
1197 #endif /* CONFIG_OF_MDIO */
1198
1199 static int bgx_init_phy(struct bgx *bgx)
1200 {
1201 if (!acpi_disabled)
1202 return bgx_init_acpi_phy(bgx);
1203
1204 return bgx_init_of_phy(bgx);
1205 }
1206
1207 static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1208 {
1209 int err;
1210 struct device *dev = &pdev->dev;
1211 struct bgx *bgx = NULL;
1212 u8 lmac;
1213 u16 sdevid;
1214
1215 bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL);
1216 if (!bgx)
1217 return -ENOMEM;
1218 bgx->pdev = pdev;
1219
1220 pci_set_drvdata(pdev, bgx);
1221
1222 err = pci_enable_device(pdev);
1223 if (err) {
1224 dev_err(dev, "Failed to enable PCI device\n");
1225 pci_set_drvdata(pdev, NULL);
1226 return err;
1227 }
1228
1229 err = pci_request_regions(pdev, DRV_NAME);
1230 if (err) {
1231 dev_err(dev, "PCI request regions failed 0x%x\n", err);
1232 goto err_disable_device;
1233 }
1234
1235 /* MAP configuration registers */
1236 bgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
1237 if (!bgx->reg_base) {
1238 dev_err(dev, "BGX: Cannot map CSR memory space, aborting\n");
1239 err = -ENOMEM;
1240 goto err_release_regions;
1241 }
1242
1243 pci_read_config_word(pdev, PCI_DEVICE_ID, &sdevid);
1244 if (sdevid != PCI_DEVICE_ID_THUNDER_RGX) {
1245 bgx->bgx_id =
1246 (pci_resource_start(pdev, PCI_CFG_REG_BAR_NUM) >> 24) & 1;
1247 bgx->bgx_id += nic_get_node_id(pdev) * MAX_BGX_PER_NODE;
1248 bgx->max_lmac = MAX_LMAC_PER_BGX;
1249 bgx_vnic[bgx->bgx_id] = bgx;
1250 } else {
1251 bgx->is_rgx = true;
1252 bgx->max_lmac = 1;
1253 bgx->bgx_id = MAX_BGX_PER_CN81XX - 1;
1254 bgx_vnic[bgx->bgx_id] = bgx;
1255 xcv_init_hw();
1256 }
1257
1258 /* On 81xx all are DLMs and on 83xx there are 3 BGX QLMs and one
1259 * BGX i.e BGX2 can be split across 2 DLMs.
1260 */
1261 pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &sdevid);
1262 if ((sdevid == PCI_SUBSYS_DEVID_81XX_BGX) ||
1263 ((sdevid == PCI_SUBSYS_DEVID_83XX_BGX) && (bgx->bgx_id == 2)))
1264 bgx->is_dlm = true;
1265
1266 bgx_get_qlm_mode(bgx);
1267
1268 err = bgx_init_phy(bgx);
1269 if (err)
1270 goto err_enable;
1271
1272 bgx_init_hw(bgx);
1273
1274 /* Enable all LMACs */
1275 for (lmac = 0; lmac < bgx->lmac_count; lmac++) {
1276 err = bgx_lmac_enable(bgx, lmac);
1277 if (err) {
1278 dev_err(dev, "BGX%d failed to enable lmac%d\n",
1279 bgx->bgx_id, lmac);
1280 while (lmac)
1281 bgx_lmac_disable(bgx, --lmac);
1282 goto err_enable;
1283 }
1284 }
1285
1286 return 0;
1287
1288 err_enable:
1289 bgx_vnic[bgx->bgx_id] = NULL;
1290 err_release_regions:
1291 pci_release_regions(pdev);
1292 err_disable_device:
1293 pci_disable_device(pdev);
1294 pci_set_drvdata(pdev, NULL);
1295 return err;
1296 }
1297
1298 static void bgx_remove(struct pci_dev *pdev)
1299 {
1300 struct bgx *bgx = pci_get_drvdata(pdev);
1301 u8 lmac;
1302
1303 /* Disable all LMACs */
1304 for (lmac = 0; lmac < bgx->lmac_count; lmac++)
1305 bgx_lmac_disable(bgx, lmac);
1306
1307 bgx_vnic[bgx->bgx_id] = NULL;
1308 pci_release_regions(pdev);
1309 pci_disable_device(pdev);
1310 pci_set_drvdata(pdev, NULL);
1311 }
1312
1313 static struct pci_driver bgx_driver = {
1314 .name = DRV_NAME,
1315 .id_table = bgx_id_table,
1316 .probe = bgx_probe,
1317 .remove = bgx_remove,
1318 };
1319
1320 static int __init bgx_init_module(void)
1321 {
1322 pr_info("%s, ver %s\n", DRV_NAME, DRV_VERSION);
1323
1324 return pci_register_driver(&bgx_driver);
1325 }
1326
1327 static void __exit bgx_cleanup_module(void)
1328 {
1329 pci_unregister_driver(&bgx_driver);
1330 }
1331
1332 module_init(bgx_init_module);
1333 module_exit(bgx_cleanup_module);
Linux kernel - Deliverables
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