net: thunderx: Wait for delayed work to finish before destroying it
[linux-2.6-block.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         bool                    link_up;
32         int                     lmacid; /* ID within BGX */
33         int                     lmacid_bd; /* ID on board */
34         struct net_device       netdev;
35         struct phy_device       *phydev;
36         unsigned int            last_duplex;
37         unsigned int            last_link;
38         unsigned int            last_speed;
39         bool                    is_sgmii;
40         struct delayed_work     dwork;
41         struct workqueue_struct *check_link;
42 };
43
44 struct bgx {
45         u8                      bgx_id;
46         u8                      qlm_mode;
47         struct  lmac            lmac[MAX_LMAC_PER_BGX];
48         int                     lmac_count;
49         int                     lmac_type;
50         int                     lane_to_sds;
51         int                     use_training;
52         void __iomem            *reg_base;
53         struct pci_dev          *pdev;
54 };
55
56 static struct bgx *bgx_vnic[MAX_BGX_THUNDER];
57 static int lmac_count; /* Total no of LMACs in system */
58
59 static int bgx_xaui_check_link(struct lmac *lmac);
60
61 /* Supported devices */
62 static const struct pci_device_id bgx_id_table[] = {
63         { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_BGX) },
64         { 0, }  /* end of table */
65 };
66
67 MODULE_AUTHOR("Cavium Inc");
68 MODULE_DESCRIPTION("Cavium Thunder BGX/MAC Driver");
69 MODULE_LICENSE("GPL v2");
70 MODULE_VERSION(DRV_VERSION);
71 MODULE_DEVICE_TABLE(pci, bgx_id_table);
72
73 /* The Cavium ThunderX network controller can *only* be found in SoCs
74  * containing the ThunderX ARM64 CPU implementation.  All accesses to the device
75  * registers on this platform are implicitly strongly ordered with respect
76  * to memory accesses. So writeq_relaxed() and readq_relaxed() are safe to use
77  * with no memory barriers in this driver.  The readq()/writeq() functions add
78  * explicit ordering operation which in this case are redundant, and only
79  * add overhead.
80  */
81
82 /* Register read/write APIs */
83 static u64 bgx_reg_read(struct bgx *bgx, u8 lmac, u64 offset)
84 {
85         void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
86
87         return readq_relaxed(addr);
88 }
89
90 static void bgx_reg_write(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
91 {
92         void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
93
94         writeq_relaxed(val, addr);
95 }
96
97 static void bgx_reg_modify(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
98 {
99         void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
100
101         writeq_relaxed(val | readq_relaxed(addr), addr);
102 }
103
104 static int bgx_poll_reg(struct bgx *bgx, u8 lmac, u64 reg, u64 mask, bool zero)
105 {
106         int timeout = 100;
107         u64 reg_val;
108
109         while (timeout) {
110                 reg_val = bgx_reg_read(bgx, lmac, reg);
111                 if (zero && !(reg_val & mask))
112                         return 0;
113                 if (!zero && (reg_val & mask))
114                         return 0;
115                 usleep_range(1000, 2000);
116                 timeout--;
117         }
118         return 1;
119 }
120
121 /* Return number of BGX present in HW */
122 unsigned bgx_get_map(int node)
123 {
124         int i;
125         unsigned map = 0;
126
127         for (i = 0; i < MAX_BGX_PER_CN88XX; i++) {
128                 if (bgx_vnic[(node * MAX_BGX_PER_CN88XX) + i])
129                         map |= (1 << i);
130         }
131
132         return map;
133 }
134 EXPORT_SYMBOL(bgx_get_map);
135
136 /* Return number of LMAC configured for this BGX */
137 int bgx_get_lmac_count(int node, int bgx_idx)
138 {
139         struct bgx *bgx;
140
141         bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
142         if (bgx)
143                 return bgx->lmac_count;
144
145         return 0;
146 }
147 EXPORT_SYMBOL(bgx_get_lmac_count);
148
149 /* Returns the current link status of LMAC */
150 void bgx_get_lmac_link_state(int node, int bgx_idx, int lmacid, void *status)
151 {
152         struct bgx_link_status *link = (struct bgx_link_status *)status;
153         struct bgx *bgx;
154         struct lmac *lmac;
155
156         bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
157         if (!bgx)
158                 return;
159
160         lmac = &bgx->lmac[lmacid];
161         link->link_up = lmac->link_up;
162         link->duplex = lmac->last_duplex;
163         link->speed = lmac->last_speed;
164 }
165 EXPORT_SYMBOL(bgx_get_lmac_link_state);
166
167 const u8 *bgx_get_lmac_mac(int node, int bgx_idx, int lmacid)
168 {
169         struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
170
171         if (bgx)
172                 return bgx->lmac[lmacid].mac;
173
174         return NULL;
175 }
176 EXPORT_SYMBOL(bgx_get_lmac_mac);
177
178 void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac)
179 {
180         struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
181
182         if (!bgx)
183                 return;
184
185         ether_addr_copy(bgx->lmac[lmacid].mac, mac);
186 }
187 EXPORT_SYMBOL(bgx_set_lmac_mac);
188
189 static void bgx_sgmii_change_link_state(struct lmac *lmac)
190 {
191         struct bgx *bgx = lmac->bgx;
192         u64 cmr_cfg;
193         u64 port_cfg = 0;
194         u64 misc_ctl = 0;
195
196         cmr_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG);
197         cmr_cfg &= ~CMR_EN;
198         bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
199
200         port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);
201         misc_ctl = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL);
202
203         if (lmac->link_up) {
204                 misc_ctl &= ~PCS_MISC_CTL_GMX_ENO;
205                 port_cfg &= ~GMI_PORT_CFG_DUPLEX;
206                 port_cfg |=  (lmac->last_duplex << 2);
207         } else {
208                 misc_ctl |= PCS_MISC_CTL_GMX_ENO;
209         }
210
211         switch (lmac->last_speed) {
212         case 10:
213                 port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
214                 port_cfg |= GMI_PORT_CFG_SPEED_MSB;  /* speed_msb 1 */
215                 port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
216                 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
217                 misc_ctl |= 50; /* samp_pt */
218                 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
219                 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
220                 break;
221         case 100:
222                 port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
223                 port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
224                 port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
225                 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
226                 misc_ctl |= 5; /* samp_pt */
227                 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
228                 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
229                 break;
230         case 1000:
231                 port_cfg |= GMI_PORT_CFG_SPEED; /* speed 1 */
232                 port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
233                 port_cfg |= GMI_PORT_CFG_SLOT_TIME; /* slottime 1 */
234                 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
235                 misc_ctl |= 1; /* samp_pt */
236                 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 512);
237                 if (lmac->last_duplex)
238                         bgx_reg_write(bgx, lmac->lmacid,
239                                       BGX_GMP_GMI_TXX_BURST, 0);
240                 else
241                         bgx_reg_write(bgx, lmac->lmacid,
242                                       BGX_GMP_GMI_TXX_BURST, 8192);
243                 break;
244         default:
245                 break;
246         }
247         bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL, misc_ctl);
248         bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG, port_cfg);
249
250         port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);
251
252         /* renable lmac */
253         cmr_cfg |= CMR_EN;
254         bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
255 }
256
257 static void bgx_lmac_handler(struct net_device *netdev)
258 {
259         struct lmac *lmac = container_of(netdev, struct lmac, netdev);
260         struct phy_device *phydev = lmac->phydev;
261         int link_changed = 0;
262
263         if (!lmac)
264                 return;
265
266         if (!phydev->link && lmac->last_link)
267                 link_changed = -1;
268
269         if (phydev->link &&
270             (lmac->last_duplex != phydev->duplex ||
271              lmac->last_link != phydev->link ||
272              lmac->last_speed != phydev->speed)) {
273                         link_changed = 1;
274         }
275
276         lmac->last_link = phydev->link;
277         lmac->last_speed = phydev->speed;
278         lmac->last_duplex = phydev->duplex;
279
280         if (!link_changed)
281                 return;
282
283         if (link_changed > 0)
284                 lmac->link_up = true;
285         else
286                 lmac->link_up = false;
287
288         if (lmac->is_sgmii)
289                 bgx_sgmii_change_link_state(lmac);
290         else
291                 bgx_xaui_check_link(lmac);
292 }
293
294 u64 bgx_get_rx_stats(int node, int bgx_idx, int lmac, int idx)
295 {
296         struct bgx *bgx;
297
298         bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
299         if (!bgx)
300                 return 0;
301
302         if (idx > 8)
303                 lmac = 0;
304         return bgx_reg_read(bgx, lmac, BGX_CMRX_RX_STAT0 + (idx * 8));
305 }
306 EXPORT_SYMBOL(bgx_get_rx_stats);
307
308 u64 bgx_get_tx_stats(int node, int bgx_idx, int lmac, int idx)
309 {
310         struct bgx *bgx;
311
312         bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
313         if (!bgx)
314                 return 0;
315
316         return bgx_reg_read(bgx, lmac, BGX_CMRX_TX_STAT0 + (idx * 8));
317 }
318 EXPORT_SYMBOL(bgx_get_tx_stats);
319
320 static void bgx_flush_dmac_addrs(struct bgx *bgx, int lmac)
321 {
322         u64 offset;
323
324         while (bgx->lmac[lmac].dmac > 0) {
325                 offset = ((bgx->lmac[lmac].dmac - 1) * sizeof(u64)) +
326                         (lmac * MAX_DMAC_PER_LMAC * sizeof(u64));
327                 bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + offset, 0);
328                 bgx->lmac[lmac].dmac--;
329         }
330 }
331
332 /* Configure BGX LMAC in internal loopback mode */
333 void bgx_lmac_internal_loopback(int node, int bgx_idx,
334                                 int lmac_idx, bool enable)
335 {
336         struct bgx *bgx;
337         struct lmac *lmac;
338         u64    cfg;
339
340         bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
341         if (!bgx)
342                 return;
343
344         lmac = &bgx->lmac[lmac_idx];
345         if (lmac->is_sgmii) {
346                 cfg = bgx_reg_read(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL);
347                 if (enable)
348                         cfg |= PCS_MRX_CTL_LOOPBACK1;
349                 else
350                         cfg &= ~PCS_MRX_CTL_LOOPBACK1;
351                 bgx_reg_write(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL, cfg);
352         } else {
353                 cfg = bgx_reg_read(bgx, lmac_idx, BGX_SPUX_CONTROL1);
354                 if (enable)
355                         cfg |= SPU_CTL_LOOPBACK;
356                 else
357                         cfg &= ~SPU_CTL_LOOPBACK;
358                 bgx_reg_write(bgx, lmac_idx, BGX_SPUX_CONTROL1, cfg);
359         }
360 }
361 EXPORT_SYMBOL(bgx_lmac_internal_loopback);
362
363 static int bgx_lmac_sgmii_init(struct bgx *bgx, int lmacid)
364 {
365         u64 cfg;
366
367         bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_THRESH, 0x30);
368         /* max packet size */
369         bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_RXX_JABBER, MAX_FRAME_SIZE);
370
371         /* Disable frame alignment if using preamble */
372         cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
373         if (cfg & 1)
374                 bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_SGMII_CTL, 0);
375
376         /* Enable lmac */
377         bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
378
379         /* PCS reset */
380         bgx_reg_modify(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_RESET);
381         if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_CTL,
382                          PCS_MRX_CTL_RESET, true)) {
383                 dev_err(&bgx->pdev->dev, "BGX PCS reset not completed\n");
384                 return -1;
385         }
386
387         /* power down, reset autoneg, autoneg enable */
388         cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MRX_CTL);
389         cfg &= ~PCS_MRX_CTL_PWR_DN;
390         cfg |= (PCS_MRX_CTL_RST_AN | PCS_MRX_CTL_AN_EN);
391         bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, cfg);
392
393         if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_STATUS,
394                          PCS_MRX_STATUS_AN_CPT, false)) {
395                 dev_err(&bgx->pdev->dev, "BGX AN_CPT not completed\n");
396                 return -1;
397         }
398
399         return 0;
400 }
401
402 static int bgx_lmac_xaui_init(struct bgx *bgx, int lmacid, int lmac_type)
403 {
404         u64 cfg;
405
406         /* Reset SPU */
407         bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET);
408         if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
409                 dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
410                 return -1;
411         }
412
413         /* Disable LMAC */
414         cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
415         cfg &= ~CMR_EN;
416         bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
417
418         bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);
419         /* Set interleaved running disparity for RXAUI */
420         if (bgx->lmac_type != BGX_MODE_RXAUI)
421                 bgx_reg_modify(bgx, lmacid,
422                                BGX_SPUX_MISC_CONTROL, SPU_MISC_CTL_RX_DIS);
423         else
424                 bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL,
425                                SPU_MISC_CTL_RX_DIS | SPU_MISC_CTL_INTLV_RDISP);
426
427         /* clear all interrupts */
428         cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_INT);
429         bgx_reg_write(bgx, lmacid, BGX_SMUX_RX_INT, cfg);
430         cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_INT);
431         bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_INT, cfg);
432         cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
433         bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
434
435         if (bgx->use_training) {
436                 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LP_CUP, 0x00);
437                 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_CUP, 0x00);
438                 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_REP, 0x00);
439                 /* training enable */
440                 bgx_reg_modify(bgx, lmacid,
441                                BGX_SPUX_BR_PMD_CRTL, SPU_PMD_CRTL_TRAIN_EN);
442         }
443
444         /* Append FCS to each packet */
445         bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, SMU_TX_APPEND_FCS_D);
446
447         /* Disable forward error correction */
448         cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_FEC_CONTROL);
449         cfg &= ~SPU_FEC_CTL_FEC_EN;
450         bgx_reg_write(bgx, lmacid, BGX_SPUX_FEC_CONTROL, cfg);
451
452         /* Disable autoneg */
453         cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_CONTROL);
454         cfg = cfg & ~(SPU_AN_CTL_AN_EN | SPU_AN_CTL_XNP_EN);
455         bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_CONTROL, cfg);
456
457         cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_ADV);
458         if (bgx->lmac_type == BGX_MODE_10G_KR)
459                 cfg |= (1 << 23);
460         else if (bgx->lmac_type == BGX_MODE_40G_KR)
461                 cfg |= (1 << 24);
462         else
463                 cfg &= ~((1 << 23) | (1 << 24));
464         cfg = cfg & (~((1ULL << 25) | (1ULL << 22) | (1ULL << 12)));
465         bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_ADV, cfg);
466
467         cfg = bgx_reg_read(bgx, 0, BGX_SPU_DBG_CONTROL);
468         cfg &= ~SPU_DBG_CTL_AN_ARB_LINK_CHK_EN;
469         bgx_reg_write(bgx, 0, BGX_SPU_DBG_CONTROL, cfg);
470
471         /* Enable lmac */
472         bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
473
474         cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_CONTROL1);
475         cfg &= ~SPU_CTL_LOW_POWER;
476         bgx_reg_write(bgx, lmacid, BGX_SPUX_CONTROL1, cfg);
477
478         cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_CTL);
479         cfg &= ~SMU_TX_CTL_UNI_EN;
480         cfg |= SMU_TX_CTL_DIC_EN;
481         bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_CTL, cfg);
482
483         /* take lmac_count into account */
484         bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_THRESH, (0x100 - 1));
485         /* max packet size */
486         bgx_reg_modify(bgx, lmacid, BGX_SMUX_RX_JABBER, MAX_FRAME_SIZE);
487
488         return 0;
489 }
490
491 static int bgx_xaui_check_link(struct lmac *lmac)
492 {
493         struct bgx *bgx = lmac->bgx;
494         int lmacid = lmac->lmacid;
495         int lmac_type = bgx->lmac_type;
496         u64 cfg;
497
498         bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL, SPU_MISC_CTL_RX_DIS);
499         if (bgx->use_training) {
500                 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
501                 if (!(cfg & (1ull << 13))) {
502                         cfg = (1ull << 13) | (1ull << 14);
503                         bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
504                         cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL);
505                         cfg |= (1ull << 0);
506                         bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL, cfg);
507                         return -1;
508                 }
509         }
510
511         /* wait for PCS to come out of reset */
512         if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
513                 dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
514                 return -1;
515         }
516
517         if ((lmac_type == BGX_MODE_10G_KR) || (lmac_type == BGX_MODE_XFI) ||
518             (lmac_type == BGX_MODE_40G_KR) || (lmac_type == BGX_MODE_XLAUI)) {
519                 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BR_STATUS1,
520                                  SPU_BR_STATUS_BLK_LOCK, false)) {
521                         dev_err(&bgx->pdev->dev,
522                                 "SPU_BR_STATUS_BLK_LOCK not completed\n");
523                         return -1;
524                 }
525         } else {
526                 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BX_STATUS,
527                                  SPU_BX_STATUS_RX_ALIGN, false)) {
528                         dev_err(&bgx->pdev->dev,
529                                 "SPU_BX_STATUS_RX_ALIGN not completed\n");
530                         return -1;
531                 }
532         }
533
534         /* Clear rcvflt bit (latching high) and read it back */
535         bgx_reg_modify(bgx, lmacid, BGX_SPUX_STATUS2, SPU_STATUS2_RCVFLT);
536         if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) {
537                 dev_err(&bgx->pdev->dev, "Receive fault, retry training\n");
538                 if (bgx->use_training) {
539                         cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
540                         if (!(cfg & (1ull << 13))) {
541                                 cfg = (1ull << 13) | (1ull << 14);
542                                 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
543                                 cfg = bgx_reg_read(bgx, lmacid,
544                                                    BGX_SPUX_BR_PMD_CRTL);
545                                 cfg |= (1ull << 0);
546                                 bgx_reg_write(bgx, lmacid,
547                                               BGX_SPUX_BR_PMD_CRTL, cfg);
548                                 return -1;
549                         }
550                 }
551                 return -1;
552         }
553
554         /* Wait for MAC RX to be ready */
555         if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_RX_CTL,
556                          SMU_RX_CTL_STATUS, true)) {
557                 dev_err(&bgx->pdev->dev, "SMU RX link not okay\n");
558                 return -1;
559         }
560
561         /* Wait for BGX RX to be idle */
562         if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_RX_IDLE, false)) {
563                 dev_err(&bgx->pdev->dev, "SMU RX not idle\n");
564                 return -1;
565         }
566
567         /* Wait for BGX TX to be idle */
568         if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_TX_IDLE, false)) {
569                 dev_err(&bgx->pdev->dev, "SMU TX not idle\n");
570                 return -1;
571         }
572
573         if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) {
574                 dev_err(&bgx->pdev->dev, "Receive fault\n");
575                 return -1;
576         }
577
578         /* Receive link is latching low. Force it high and verify it */
579         bgx_reg_modify(bgx, lmacid, BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK);
580         if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_STATUS1,
581                          SPU_STATUS1_RCV_LNK, false)) {
582                 dev_err(&bgx->pdev->dev, "SPU receive link down\n");
583                 return -1;
584         }
585
586         cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_MISC_CONTROL);
587         cfg &= ~SPU_MISC_CTL_RX_DIS;
588         bgx_reg_write(bgx, lmacid, BGX_SPUX_MISC_CONTROL, cfg);
589         return 0;
590 }
591
592 static void bgx_poll_for_link(struct work_struct *work)
593 {
594         struct lmac *lmac;
595         u64 link;
596
597         lmac = container_of(work, struct lmac, dwork.work);
598
599         /* Receive link is latching low. Force it high and verify it */
600         bgx_reg_modify(lmac->bgx, lmac->lmacid,
601                        BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK);
602         bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1,
603                      SPU_STATUS1_RCV_LNK, false);
604
605         link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1);
606         if (link & SPU_STATUS1_RCV_LNK) {
607                 lmac->link_up = 1;
608                 if (lmac->bgx->lmac_type == BGX_MODE_XLAUI)
609                         lmac->last_speed = 40000;
610                 else
611                         lmac->last_speed = 10000;
612                 lmac->last_duplex = 1;
613         } else {
614                 lmac->link_up = 0;
615         }
616
617         if (lmac->last_link != lmac->link_up) {
618                 lmac->last_link = lmac->link_up;
619                 if (lmac->link_up)
620                         bgx_xaui_check_link(lmac);
621         }
622
623         queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 2);
624 }
625
626 static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
627 {
628         struct lmac *lmac;
629         u64 cfg;
630
631         lmac = &bgx->lmac[lmacid];
632         lmac->bgx = bgx;
633
634         if (bgx->lmac_type == BGX_MODE_SGMII) {
635                 lmac->is_sgmii = 1;
636                 if (bgx_lmac_sgmii_init(bgx, lmacid))
637                         return -1;
638         } else {
639                 lmac->is_sgmii = 0;
640                 if (bgx_lmac_xaui_init(bgx, lmacid, bgx->lmac_type))
641                         return -1;
642         }
643
644         if (lmac->is_sgmii) {
645                 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
646                 cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
647                 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND, cfg);
648                 bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_MIN_PKT, 60 - 1);
649         } else {
650                 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_APPEND);
651                 cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
652                 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, cfg);
653                 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_MIN_PKT, 60 + 4);
654         }
655
656         /* Enable lmac */
657         bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG,
658                        CMR_EN | CMR_PKT_RX_EN | CMR_PKT_TX_EN);
659
660         /* Restore default cfg, incase low level firmware changed it */
661         bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, 0x03);
662
663         if ((bgx->lmac_type != BGX_MODE_XFI) &&
664             (bgx->lmac_type != BGX_MODE_XLAUI) &&
665             (bgx->lmac_type != BGX_MODE_40G_KR) &&
666             (bgx->lmac_type != BGX_MODE_10G_KR)) {
667                 if (!lmac->phydev)
668                         return -ENODEV;
669
670                 lmac->phydev->dev_flags = 0;
671
672                 if (phy_connect_direct(&lmac->netdev, lmac->phydev,
673                                        bgx_lmac_handler,
674                                        PHY_INTERFACE_MODE_SGMII))
675                         return -ENODEV;
676
677                 phy_start_aneg(lmac->phydev);
678         } else {
679                 lmac->check_link = alloc_workqueue("check_link", WQ_UNBOUND |
680                                                    WQ_MEM_RECLAIM, 1);
681                 if (!lmac->check_link)
682                         return -ENOMEM;
683                 INIT_DELAYED_WORK(&lmac->dwork, bgx_poll_for_link);
684                 queue_delayed_work(lmac->check_link, &lmac->dwork, 0);
685         }
686
687         return 0;
688 }
689
690 static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)
691 {
692         struct lmac *lmac;
693         u64 cmrx_cfg;
694
695         lmac = &bgx->lmac[lmacid];
696         if (lmac->check_link) {
697                 /* Destroy work queue */
698                 cancel_delayed_work_sync(&lmac->dwork);
699                 destroy_workqueue(lmac->check_link);
700         }
701
702         cmrx_cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
703         cmrx_cfg &= ~(1 << 15);
704         bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cmrx_cfg);
705         bgx_flush_dmac_addrs(bgx, lmacid);
706
707         if ((bgx->lmac_type != BGX_MODE_XFI) &&
708             (bgx->lmac_type != BGX_MODE_XLAUI) &&
709             (bgx->lmac_type != BGX_MODE_40G_KR) &&
710             (bgx->lmac_type != BGX_MODE_10G_KR) && lmac->phydev)
711                 phy_disconnect(lmac->phydev);
712
713         lmac->phydev = NULL;
714 }
715
716 static void bgx_set_num_ports(struct bgx *bgx)
717 {
718         u64 lmac_count;
719
720         switch (bgx->qlm_mode) {
721         case QLM_MODE_SGMII:
722                 bgx->lmac_count = 4;
723                 bgx->lmac_type = BGX_MODE_SGMII;
724                 bgx->lane_to_sds = 0;
725                 break;
726         case QLM_MODE_XAUI_1X4:
727                 bgx->lmac_count = 1;
728                 bgx->lmac_type = BGX_MODE_XAUI;
729                 bgx->lane_to_sds = 0xE4;
730                         break;
731         case QLM_MODE_RXAUI_2X2:
732                 bgx->lmac_count = 2;
733                 bgx->lmac_type = BGX_MODE_RXAUI;
734                 bgx->lane_to_sds = 0xE4;
735                         break;
736         case QLM_MODE_XFI_4X1:
737                 bgx->lmac_count = 4;
738                 bgx->lmac_type = BGX_MODE_XFI;
739                 bgx->lane_to_sds = 0;
740                 break;
741         case QLM_MODE_XLAUI_1X4:
742                 bgx->lmac_count = 1;
743                 bgx->lmac_type = BGX_MODE_XLAUI;
744                 bgx->lane_to_sds = 0xE4;
745                 break;
746         case QLM_MODE_10G_KR_4X1:
747                 bgx->lmac_count = 4;
748                 bgx->lmac_type = BGX_MODE_10G_KR;
749                 bgx->lane_to_sds = 0;
750                 bgx->use_training = 1;
751                 break;
752         case QLM_MODE_40G_KR4_1X4:
753                 bgx->lmac_count = 1;
754                 bgx->lmac_type = BGX_MODE_40G_KR;
755                 bgx->lane_to_sds = 0xE4;
756                 bgx->use_training = 1;
757                 break;
758         default:
759                 bgx->lmac_count = 0;
760                 break;
761         }
762
763         /* Check if low level firmware has programmed LMAC count
764          * based on board type, if yes consider that otherwise
765          * the default static values
766          */
767         lmac_count = bgx_reg_read(bgx, 0, BGX_CMR_RX_LMACS) & 0x7;
768         if (lmac_count != 4)
769                 bgx->lmac_count = lmac_count;
770 }
771
772 static void bgx_init_hw(struct bgx *bgx)
773 {
774         int i;
775
776         bgx_set_num_ports(bgx);
777
778         bgx_reg_modify(bgx, 0, BGX_CMR_GLOBAL_CFG, CMR_GLOBAL_CFG_FCS_STRIP);
779         if (bgx_reg_read(bgx, 0, BGX_CMR_BIST_STATUS))
780                 dev_err(&bgx->pdev->dev, "BGX%d BIST failed\n", bgx->bgx_id);
781
782         /* Set lmac type and lane2serdes mapping */
783         for (i = 0; i < bgx->lmac_count; i++) {
784                 if (bgx->lmac_type == BGX_MODE_RXAUI) {
785                         if (i)
786                                 bgx->lane_to_sds = 0x0e;
787                         else
788                                 bgx->lane_to_sds = 0x04;
789                         bgx_reg_write(bgx, i, BGX_CMRX_CFG,
790                                       (bgx->lmac_type << 8) | bgx->lane_to_sds);
791                         continue;
792                 }
793                 bgx_reg_write(bgx, i, BGX_CMRX_CFG,
794                               (bgx->lmac_type << 8) | (bgx->lane_to_sds + i));
795                 bgx->lmac[i].lmacid_bd = lmac_count;
796                 lmac_count++;
797         }
798
799         bgx_reg_write(bgx, 0, BGX_CMR_TX_LMACS, bgx->lmac_count);
800         bgx_reg_write(bgx, 0, BGX_CMR_RX_LMACS, bgx->lmac_count);
801
802         /* Set the backpressure AND mask */
803         for (i = 0; i < bgx->lmac_count; i++)
804                 bgx_reg_modify(bgx, 0, BGX_CMR_CHAN_MSK_AND,
805                                ((1ULL << MAX_BGX_CHANS_PER_LMAC) - 1) <<
806                                (i * MAX_BGX_CHANS_PER_LMAC));
807
808         /* Disable all MAC filtering */
809         for (i = 0; i < RX_DMAC_COUNT; i++)
810                 bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + (i * 8), 0x00);
811
812         /* Disable MAC steering (NCSI traffic) */
813         for (i = 0; i < RX_TRAFFIC_STEER_RULE_COUNT; i++)
814                 bgx_reg_write(bgx, 0, BGX_CMR_RX_STREERING + (i * 8), 0x00);
815 }
816
817 static void bgx_get_qlm_mode(struct bgx *bgx)
818 {
819         struct device *dev = &bgx->pdev->dev;
820         int lmac_type;
821         int train_en;
822
823         /* Read LMAC0 type to figure out QLM mode
824          * This is configured by low level firmware
825          */
826         lmac_type = bgx_reg_read(bgx, 0, BGX_CMRX_CFG);
827         lmac_type = (lmac_type >> 8) & 0x07;
828
829         train_en = bgx_reg_read(bgx, 0, BGX_SPUX_BR_PMD_CRTL) &
830                                 SPU_PMD_CRTL_TRAIN_EN;
831
832         switch (lmac_type) {
833         case BGX_MODE_SGMII:
834                 bgx->qlm_mode = QLM_MODE_SGMII;
835                 dev_info(dev, "BGX%d QLM mode: SGMII\n", bgx->bgx_id);
836                 break;
837         case BGX_MODE_XAUI:
838                 bgx->qlm_mode = QLM_MODE_XAUI_1X4;
839                 dev_info(dev, "BGX%d QLM mode: XAUI\n", bgx->bgx_id);
840                 break;
841         case BGX_MODE_RXAUI:
842                 bgx->qlm_mode = QLM_MODE_RXAUI_2X2;
843                 dev_info(dev, "BGX%d QLM mode: RXAUI\n", bgx->bgx_id);
844                 break;
845         case BGX_MODE_XFI:
846                 if (!train_en) {
847                         bgx->qlm_mode = QLM_MODE_XFI_4X1;
848                         dev_info(dev, "BGX%d QLM mode: XFI\n", bgx->bgx_id);
849                 } else {
850                         bgx->qlm_mode = QLM_MODE_10G_KR_4X1;
851                         dev_info(dev, "BGX%d QLM mode: 10G_KR\n", bgx->bgx_id);
852                 }
853                 break;
854         case BGX_MODE_XLAUI:
855                 if (!train_en) {
856                         bgx->qlm_mode = QLM_MODE_XLAUI_1X4;
857                         dev_info(dev, "BGX%d QLM mode: XLAUI\n", bgx->bgx_id);
858                 } else {
859                         bgx->qlm_mode = QLM_MODE_40G_KR4_1X4;
860                         dev_info(dev, "BGX%d QLM mode: 40G_KR4\n", bgx->bgx_id);
861                 }
862                 break;
863         default:
864                 bgx->qlm_mode = QLM_MODE_SGMII;
865                 dev_info(dev, "BGX%d QLM default mode: SGMII\n", bgx->bgx_id);
866         }
867 }
868
869 #ifdef CONFIG_ACPI
870
871 static int acpi_get_mac_address(struct acpi_device *adev, u8 *dst)
872 {
873         u8 mac[ETH_ALEN];
874         int ret;
875
876         ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev),
877                                             "mac-address", mac, ETH_ALEN);
878         if (ret)
879                 goto out;
880
881         if (!is_valid_ether_addr(mac)) {
882                 ret = -EINVAL;
883                 goto out;
884         }
885
886         memcpy(dst, mac, ETH_ALEN);
887 out:
888         return ret;
889 }
890
891 /* Currently only sets the MAC address. */
892 static acpi_status bgx_acpi_register_phy(acpi_handle handle,
893                                          u32 lvl, void *context, void **rv)
894 {
895         struct bgx *bgx = context;
896         struct acpi_device *adev;
897
898         if (acpi_bus_get_device(handle, &adev))
899                 goto out;
900
901         acpi_get_mac_address(adev, bgx->lmac[bgx->lmac_count].mac);
902
903         SET_NETDEV_DEV(&bgx->lmac[bgx->lmac_count].netdev, &bgx->pdev->dev);
904
905         bgx->lmac[bgx->lmac_count].lmacid = bgx->lmac_count;
906 out:
907         bgx->lmac_count++;
908         return AE_OK;
909 }
910
911 static acpi_status bgx_acpi_match_id(acpi_handle handle, u32 lvl,
912                                      void *context, void **ret_val)
913 {
914         struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
915         struct bgx *bgx = context;
916         char bgx_sel[5];
917
918         snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id);
919         if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &string))) {
920                 pr_warn("Invalid link device\n");
921                 return AE_OK;
922         }
923
924         if (strncmp(string.pointer, bgx_sel, 4))
925                 return AE_OK;
926
927         acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
928                             bgx_acpi_register_phy, NULL, bgx, NULL);
929
930         kfree(string.pointer);
931         return AE_CTRL_TERMINATE;
932 }
933
934 static int bgx_init_acpi_phy(struct bgx *bgx)
935 {
936         acpi_get_devices(NULL, bgx_acpi_match_id, bgx, (void **)NULL);
937         return 0;
938 }
939
940 #else
941
942 static int bgx_init_acpi_phy(struct bgx *bgx)
943 {
944         return -ENODEV;
945 }
946
947 #endif /* CONFIG_ACPI */
948
949 #if IS_ENABLED(CONFIG_OF_MDIO)
950
951 static int bgx_init_of_phy(struct bgx *bgx)
952 {
953         struct device_node *np;
954         struct device_node *np_child;
955         u8 lmac = 0;
956         char bgx_sel[5];
957         const char *mac;
958
959         /* Get BGX node from DT */
960         snprintf(bgx_sel, 5, "bgx%d", bgx->bgx_id);
961         np = of_find_node_by_name(NULL, bgx_sel);
962         if (!np)
963                 return -ENODEV;
964
965         for_each_child_of_node(np, np_child) {
966                 struct device_node *phy_np = of_parse_phandle(np_child,
967                                                               "phy-handle", 0);
968                 if (!phy_np)
969                         continue;
970                 bgx->lmac[lmac].phydev = of_phy_find_device(phy_np);
971
972                 mac = of_get_mac_address(np_child);
973                 if (mac)
974                         ether_addr_copy(bgx->lmac[lmac].mac, mac);
975
976                 SET_NETDEV_DEV(&bgx->lmac[lmac].netdev, &bgx->pdev->dev);
977                 bgx->lmac[lmac].lmacid = lmac;
978                 lmac++;
979                 if (lmac == MAX_LMAC_PER_BGX) {
980                         of_node_put(np_child);
981                         break;
982                 }
983         }
984         return 0;
985 }
986
987 #else
988
989 static int bgx_init_of_phy(struct bgx *bgx)
990 {
991         return -ENODEV;
992 }
993
994 #endif /* CONFIG_OF_MDIO */
995
996 static int bgx_init_phy(struct bgx *bgx)
997 {
998         if (!acpi_disabled)
999                 return bgx_init_acpi_phy(bgx);
1000
1001         return bgx_init_of_phy(bgx);
1002 }
1003
1004 static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1005 {
1006         int err;
1007         struct device *dev = &pdev->dev;
1008         struct bgx *bgx = NULL;
1009         u8 lmac;
1010
1011         /* Load octeon mdio driver */
1012         octeon_mdiobus_force_mod_depencency();
1013
1014         bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL);
1015         if (!bgx)
1016                 return -ENOMEM;
1017         bgx->pdev = pdev;
1018
1019         pci_set_drvdata(pdev, bgx);
1020
1021         err = pci_enable_device(pdev);
1022         if (err) {
1023                 dev_err(dev, "Failed to enable PCI device\n");
1024                 pci_set_drvdata(pdev, NULL);
1025                 return err;
1026         }
1027
1028         err = pci_request_regions(pdev, DRV_NAME);
1029         if (err) {
1030                 dev_err(dev, "PCI request regions failed 0x%x\n", err);
1031                 goto err_disable_device;
1032         }
1033
1034         /* MAP configuration registers */
1035         bgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
1036         if (!bgx->reg_base) {
1037                 dev_err(dev, "BGX: Cannot map CSR memory space, aborting\n");
1038                 err = -ENOMEM;
1039                 goto err_release_regions;
1040         }
1041         bgx->bgx_id = (pci_resource_start(pdev, PCI_CFG_REG_BAR_NUM) >> 24) & 1;
1042         bgx->bgx_id += nic_get_node_id(pdev) * MAX_BGX_PER_CN88XX;
1043
1044         bgx_vnic[bgx->bgx_id] = bgx;
1045         bgx_get_qlm_mode(bgx);
1046
1047         err = bgx_init_phy(bgx);
1048         if (err)
1049                 goto err_enable;
1050
1051         bgx_init_hw(bgx);
1052
1053         /* Enable all LMACs */
1054         for (lmac = 0; lmac < bgx->lmac_count; lmac++) {
1055                 err = bgx_lmac_enable(bgx, lmac);
1056                 if (err) {
1057                         dev_err(dev, "BGX%d failed to enable lmac%d\n",
1058                                 bgx->bgx_id, lmac);
1059                         goto err_enable;
1060                 }
1061         }
1062
1063         return 0;
1064
1065 err_enable:
1066         bgx_vnic[bgx->bgx_id] = NULL;
1067 err_release_regions:
1068         pci_release_regions(pdev);
1069 err_disable_device:
1070         pci_disable_device(pdev);
1071         pci_set_drvdata(pdev, NULL);
1072         return err;
1073 }
1074
1075 static void bgx_remove(struct pci_dev *pdev)
1076 {
1077         struct bgx *bgx = pci_get_drvdata(pdev);
1078         u8 lmac;
1079
1080         /* Disable all LMACs */
1081         for (lmac = 0; lmac < bgx->lmac_count; lmac++)
1082                 bgx_lmac_disable(bgx, lmac);
1083
1084         bgx_vnic[bgx->bgx_id] = NULL;
1085         pci_release_regions(pdev);
1086         pci_disable_device(pdev);
1087         pci_set_drvdata(pdev, NULL);
1088 }
1089
1090 static struct pci_driver bgx_driver = {
1091         .name = DRV_NAME,
1092         .id_table = bgx_id_table,
1093         .probe = bgx_probe,
1094         .remove = bgx_remove,
1095 };
1096
1097 static int __init bgx_init_module(void)
1098 {
1099         pr_info("%s, ver %s\n", DRV_NAME, DRV_VERSION);
1100
1101         return pci_register_driver(&bgx_driver);
1102 }
1103
1104 static void __exit bgx_cleanup_module(void)
1105 {
1106         pci_unregister_driver(&bgx_driver);
1107 }
1108
1109 module_init(bgx_init_module);
1110 module_exit(bgx_cleanup_module);