2 * Copyright (C) 2015 Cavium, Inc.
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.
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>
17 #include <linux/of_mdio.h>
18 #include <linux/of_net.h>
22 #include "thunder_bgx.h"
24 #define DRV_NAME "thunder-BGX"
25 #define DRV_VERSION "1.0"
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;
40 struct delayed_work dwork;
41 struct workqueue_struct *check_link;
47 struct lmac lmac[MAX_LMAC_PER_BGX];
52 void __iomem *reg_base;
56 static struct bgx *bgx_vnic[MAX_BGX_THUNDER];
57 static int lmac_count; /* Total no of LMACs in system */
59 static int bgx_xaui_check_link(struct lmac *lmac);
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 */
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);
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
82 /* Register read/write APIs */
83 static u64 bgx_reg_read(struct bgx *bgx, u8 lmac, u64 offset)
85 void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
87 return readq_relaxed(addr);
90 static void bgx_reg_write(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
92 void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
94 writeq_relaxed(val, addr);
97 static void bgx_reg_modify(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
99 void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
101 writeq_relaxed(val | readq_relaxed(addr), addr);
104 static int bgx_poll_reg(struct bgx *bgx, u8 lmac, u64 reg, u64 mask, bool zero)
110 reg_val = bgx_reg_read(bgx, lmac, reg);
111 if (zero && !(reg_val & mask))
113 if (!zero && (reg_val & mask))
115 usleep_range(1000, 2000);
121 /* Return number of BGX present in HW */
122 unsigned bgx_get_map(int node)
127 for (i = 0; i < MAX_BGX_PER_CN88XX; i++) {
128 if (bgx_vnic[(node * MAX_BGX_PER_CN88XX) + i])
134 EXPORT_SYMBOL(bgx_get_map);
136 /* Return number of LMAC configured for this BGX */
137 int bgx_get_lmac_count(int node, int bgx_idx)
141 bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
143 return bgx->lmac_count;
147 EXPORT_SYMBOL(bgx_get_lmac_count);
149 /* Returns the current link status of LMAC */
150 void bgx_get_lmac_link_state(int node, int bgx_idx, int lmacid, void *status)
152 struct bgx_link_status *link = (struct bgx_link_status *)status;
156 bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
160 lmac = &bgx->lmac[lmacid];
161 link->link_up = lmac->link_up;
162 link->duplex = lmac->last_duplex;
163 link->speed = lmac->last_speed;
165 EXPORT_SYMBOL(bgx_get_lmac_link_state);
167 const u8 *bgx_get_lmac_mac(int node, int bgx_idx, int lmacid)
169 struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
172 return bgx->lmac[lmacid].mac;
176 EXPORT_SYMBOL(bgx_get_lmac_mac);
178 void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac)
180 struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
185 ether_addr_copy(bgx->lmac[lmacid].mac, mac);
187 EXPORT_SYMBOL(bgx_set_lmac_mac);
189 void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable)
191 struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
197 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
199 cfg |= CMR_PKT_RX_EN | CMR_PKT_TX_EN;
201 cfg &= ~(CMR_PKT_RX_EN | CMR_PKT_TX_EN);
202 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
204 EXPORT_SYMBOL(bgx_lmac_rx_tx_enable);
206 static void bgx_sgmii_change_link_state(struct lmac *lmac)
208 struct bgx *bgx = lmac->bgx;
213 cmr_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG);
215 bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
217 port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);
218 misc_ctl = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL);
221 misc_ctl &= ~PCS_MISC_CTL_GMX_ENO;
222 port_cfg &= ~GMI_PORT_CFG_DUPLEX;
223 port_cfg |= (lmac->last_duplex << 2);
225 misc_ctl |= PCS_MISC_CTL_GMX_ENO;
228 switch (lmac->last_speed) {
230 port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
231 port_cfg |= GMI_PORT_CFG_SPEED_MSB; /* speed_msb 1 */
232 port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
233 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
234 misc_ctl |= 50; /* samp_pt */
235 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
236 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
239 port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
240 port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
241 port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
242 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
243 misc_ctl |= 5; /* samp_pt */
244 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
245 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
248 port_cfg |= GMI_PORT_CFG_SPEED; /* speed 1 */
249 port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
250 port_cfg |= GMI_PORT_CFG_SLOT_TIME; /* slottime 1 */
251 misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
252 misc_ctl |= 1; /* samp_pt */
253 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 512);
254 if (lmac->last_duplex)
255 bgx_reg_write(bgx, lmac->lmacid,
256 BGX_GMP_GMI_TXX_BURST, 0);
258 bgx_reg_write(bgx, lmac->lmacid,
259 BGX_GMP_GMI_TXX_BURST, 8192);
264 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL, misc_ctl);
265 bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG, port_cfg);
267 port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);
271 bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
274 static void bgx_lmac_handler(struct net_device *netdev)
276 struct lmac *lmac = container_of(netdev, struct lmac, netdev);
277 struct phy_device *phydev;
278 int link_changed = 0;
283 phydev = lmac->phydev;
285 if (!phydev->link && lmac->last_link)
289 (lmac->last_duplex != phydev->duplex ||
290 lmac->last_link != phydev->link ||
291 lmac->last_speed != phydev->speed)) {
295 lmac->last_link = phydev->link;
296 lmac->last_speed = phydev->speed;
297 lmac->last_duplex = phydev->duplex;
302 if (link_changed > 0)
303 lmac->link_up = true;
305 lmac->link_up = false;
308 bgx_sgmii_change_link_state(lmac);
310 bgx_xaui_check_link(lmac);
313 u64 bgx_get_rx_stats(int node, int bgx_idx, int lmac, int idx)
317 bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
323 return bgx_reg_read(bgx, lmac, BGX_CMRX_RX_STAT0 + (idx * 8));
325 EXPORT_SYMBOL(bgx_get_rx_stats);
327 u64 bgx_get_tx_stats(int node, int bgx_idx, int lmac, int idx)
331 bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
335 return bgx_reg_read(bgx, lmac, BGX_CMRX_TX_STAT0 + (idx * 8));
337 EXPORT_SYMBOL(bgx_get_tx_stats);
339 static void bgx_flush_dmac_addrs(struct bgx *bgx, int lmac)
343 while (bgx->lmac[lmac].dmac > 0) {
344 offset = ((bgx->lmac[lmac].dmac - 1) * sizeof(u64)) +
345 (lmac * MAX_DMAC_PER_LMAC * sizeof(u64));
346 bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + offset, 0);
347 bgx->lmac[lmac].dmac--;
351 /* Configure BGX LMAC in internal loopback mode */
352 void bgx_lmac_internal_loopback(int node, int bgx_idx,
353 int lmac_idx, bool enable)
359 bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
363 lmac = &bgx->lmac[lmac_idx];
364 if (lmac->is_sgmii) {
365 cfg = bgx_reg_read(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL);
367 cfg |= PCS_MRX_CTL_LOOPBACK1;
369 cfg &= ~PCS_MRX_CTL_LOOPBACK1;
370 bgx_reg_write(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL, cfg);
372 cfg = bgx_reg_read(bgx, lmac_idx, BGX_SPUX_CONTROL1);
374 cfg |= SPU_CTL_LOOPBACK;
376 cfg &= ~SPU_CTL_LOOPBACK;
377 bgx_reg_write(bgx, lmac_idx, BGX_SPUX_CONTROL1, cfg);
380 EXPORT_SYMBOL(bgx_lmac_internal_loopback);
382 static int bgx_lmac_sgmii_init(struct bgx *bgx, int lmacid)
386 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_THRESH, 0x30);
387 /* max packet size */
388 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_RXX_JABBER, MAX_FRAME_SIZE);
390 /* Disable frame alignment if using preamble */
391 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
393 bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_SGMII_CTL, 0);
396 bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
399 bgx_reg_modify(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_RESET);
400 if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_CTL,
401 PCS_MRX_CTL_RESET, true)) {
402 dev_err(&bgx->pdev->dev, "BGX PCS reset not completed\n");
406 /* power down, reset autoneg, autoneg enable */
407 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MRX_CTL);
408 cfg &= ~PCS_MRX_CTL_PWR_DN;
409 cfg |= (PCS_MRX_CTL_RST_AN | PCS_MRX_CTL_AN_EN);
410 bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, cfg);
412 if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_STATUS,
413 PCS_MRX_STATUS_AN_CPT, false)) {
414 dev_err(&bgx->pdev->dev, "BGX AN_CPT not completed\n");
421 static int bgx_lmac_xaui_init(struct bgx *bgx, int lmacid, int lmac_type)
426 bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET);
427 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
428 dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
433 cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
435 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
437 bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);
438 /* Set interleaved running disparity for RXAUI */
439 if (bgx->lmac_type != BGX_MODE_RXAUI)
440 bgx_reg_modify(bgx, lmacid,
441 BGX_SPUX_MISC_CONTROL, SPU_MISC_CTL_RX_DIS);
443 bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL,
444 SPU_MISC_CTL_RX_DIS | SPU_MISC_CTL_INTLV_RDISP);
446 /* clear all interrupts */
447 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_INT);
448 bgx_reg_write(bgx, lmacid, BGX_SMUX_RX_INT, cfg);
449 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_INT);
450 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_INT, cfg);
451 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
452 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
454 if (bgx->use_training) {
455 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LP_CUP, 0x00);
456 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_CUP, 0x00);
457 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_REP, 0x00);
458 /* training enable */
459 bgx_reg_modify(bgx, lmacid,
460 BGX_SPUX_BR_PMD_CRTL, SPU_PMD_CRTL_TRAIN_EN);
463 /* Append FCS to each packet */
464 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, SMU_TX_APPEND_FCS_D);
466 /* Disable forward error correction */
467 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_FEC_CONTROL);
468 cfg &= ~SPU_FEC_CTL_FEC_EN;
469 bgx_reg_write(bgx, lmacid, BGX_SPUX_FEC_CONTROL, cfg);
471 /* Disable autoneg */
472 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_CONTROL);
473 cfg = cfg & ~(SPU_AN_CTL_AN_EN | SPU_AN_CTL_XNP_EN);
474 bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_CONTROL, cfg);
476 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_ADV);
477 if (bgx->lmac_type == BGX_MODE_10G_KR)
479 else if (bgx->lmac_type == BGX_MODE_40G_KR)
482 cfg &= ~((1 << 23) | (1 << 24));
483 cfg = cfg & (~((1ULL << 25) | (1ULL << 22) | (1ULL << 12)));
484 bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_ADV, cfg);
486 cfg = bgx_reg_read(bgx, 0, BGX_SPU_DBG_CONTROL);
487 cfg &= ~SPU_DBG_CTL_AN_ARB_LINK_CHK_EN;
488 bgx_reg_write(bgx, 0, BGX_SPU_DBG_CONTROL, cfg);
491 bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
493 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_CONTROL1);
494 cfg &= ~SPU_CTL_LOW_POWER;
495 bgx_reg_write(bgx, lmacid, BGX_SPUX_CONTROL1, cfg);
497 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_CTL);
498 cfg &= ~SMU_TX_CTL_UNI_EN;
499 cfg |= SMU_TX_CTL_DIC_EN;
500 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_CTL, cfg);
502 /* take lmac_count into account */
503 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_THRESH, (0x100 - 1));
504 /* max packet size */
505 bgx_reg_modify(bgx, lmacid, BGX_SMUX_RX_JABBER, MAX_FRAME_SIZE);
510 static int bgx_xaui_check_link(struct lmac *lmac)
512 struct bgx *bgx = lmac->bgx;
513 int lmacid = lmac->lmacid;
514 int lmac_type = bgx->lmac_type;
517 bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL, SPU_MISC_CTL_RX_DIS);
518 if (bgx->use_training) {
519 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
520 if (!(cfg & (1ull << 13))) {
521 cfg = (1ull << 13) | (1ull << 14);
522 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
523 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL);
525 bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL, cfg);
530 /* wait for PCS to come out of reset */
531 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
532 dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
536 if ((lmac_type == BGX_MODE_10G_KR) || (lmac_type == BGX_MODE_XFI) ||
537 (lmac_type == BGX_MODE_40G_KR) || (lmac_type == BGX_MODE_XLAUI)) {
538 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BR_STATUS1,
539 SPU_BR_STATUS_BLK_LOCK, false)) {
540 dev_err(&bgx->pdev->dev,
541 "SPU_BR_STATUS_BLK_LOCK not completed\n");
545 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BX_STATUS,
546 SPU_BX_STATUS_RX_ALIGN, false)) {
547 dev_err(&bgx->pdev->dev,
548 "SPU_BX_STATUS_RX_ALIGN not completed\n");
553 /* Clear rcvflt bit (latching high) and read it back */
554 bgx_reg_modify(bgx, lmacid, BGX_SPUX_STATUS2, SPU_STATUS2_RCVFLT);
555 if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) {
556 dev_err(&bgx->pdev->dev, "Receive fault, retry training\n");
557 if (bgx->use_training) {
558 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
559 if (!(cfg & (1ull << 13))) {
560 cfg = (1ull << 13) | (1ull << 14);
561 bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
562 cfg = bgx_reg_read(bgx, lmacid,
563 BGX_SPUX_BR_PMD_CRTL);
565 bgx_reg_write(bgx, lmacid,
566 BGX_SPUX_BR_PMD_CRTL, cfg);
573 /* Wait for MAC RX to be ready */
574 if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_RX_CTL,
575 SMU_RX_CTL_STATUS, true)) {
576 dev_err(&bgx->pdev->dev, "SMU RX link not okay\n");
580 /* Wait for BGX RX to be idle */
581 if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_RX_IDLE, false)) {
582 dev_err(&bgx->pdev->dev, "SMU RX not idle\n");
586 /* Wait for BGX TX to be idle */
587 if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_TX_IDLE, false)) {
588 dev_err(&bgx->pdev->dev, "SMU TX not idle\n");
592 if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) {
593 dev_err(&bgx->pdev->dev, "Receive fault\n");
597 /* Receive link is latching low. Force it high and verify it */
598 bgx_reg_modify(bgx, lmacid, BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK);
599 if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_STATUS1,
600 SPU_STATUS1_RCV_LNK, false)) {
601 dev_err(&bgx->pdev->dev, "SPU receive link down\n");
605 cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_MISC_CONTROL);
606 cfg &= ~SPU_MISC_CTL_RX_DIS;
607 bgx_reg_write(bgx, lmacid, BGX_SPUX_MISC_CONTROL, cfg);
611 static void bgx_poll_for_link(struct work_struct *work)
616 lmac = container_of(work, struct lmac, dwork.work);
618 /* Receive link is latching low. Force it high and verify it */
619 bgx_reg_modify(lmac->bgx, lmac->lmacid,
620 BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK);
621 bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1,
622 SPU_STATUS1_RCV_LNK, false);
624 link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1);
625 if (link & SPU_STATUS1_RCV_LNK) {
627 if (lmac->bgx->lmac_type == BGX_MODE_XLAUI)
628 lmac->last_speed = 40000;
630 lmac->last_speed = 10000;
631 lmac->last_duplex = 1;
634 lmac->last_speed = SPEED_UNKNOWN;
635 lmac->last_duplex = DUPLEX_UNKNOWN;
638 if (lmac->last_link != lmac->link_up) {
639 lmac->last_link = lmac->link_up;
641 bgx_xaui_check_link(lmac);
644 queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 2);
647 static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
652 lmac = &bgx->lmac[lmacid];
655 if (bgx->lmac_type == BGX_MODE_SGMII) {
657 if (bgx_lmac_sgmii_init(bgx, lmacid))
661 if (bgx_lmac_xaui_init(bgx, lmacid, bgx->lmac_type))
665 if (lmac->is_sgmii) {
666 cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
667 cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
668 bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND, cfg);
669 bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_MIN_PKT, 60 - 1);
671 cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_APPEND);
672 cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
673 bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, cfg);
674 bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_MIN_PKT, 60 + 4);
678 bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
680 /* Restore default cfg, incase low level firmware changed it */
681 bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, 0x03);
683 if ((bgx->lmac_type != BGX_MODE_XFI) &&
684 (bgx->lmac_type != BGX_MODE_XLAUI) &&
685 (bgx->lmac_type != BGX_MODE_40G_KR) &&
686 (bgx->lmac_type != BGX_MODE_10G_KR)) {
690 lmac->phydev->dev_flags = 0;
692 if (phy_connect_direct(&lmac->netdev, lmac->phydev,
694 PHY_INTERFACE_MODE_SGMII))
697 phy_start_aneg(lmac->phydev);
699 lmac->check_link = alloc_workqueue("check_link", WQ_UNBOUND |
701 if (!lmac->check_link)
703 INIT_DELAYED_WORK(&lmac->dwork, bgx_poll_for_link);
704 queue_delayed_work(lmac->check_link, &lmac->dwork, 0);
710 static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)
715 lmac = &bgx->lmac[lmacid];
716 if (lmac->check_link) {
717 /* Destroy work queue */
718 cancel_delayed_work_sync(&lmac->dwork);
719 destroy_workqueue(lmac->check_link);
722 cmrx_cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
723 cmrx_cfg &= ~(1 << 15);
724 bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cmrx_cfg);
725 bgx_flush_dmac_addrs(bgx, lmacid);
727 if ((bgx->lmac_type != BGX_MODE_XFI) &&
728 (bgx->lmac_type != BGX_MODE_XLAUI) &&
729 (bgx->lmac_type != BGX_MODE_40G_KR) &&
730 (bgx->lmac_type != BGX_MODE_10G_KR) && lmac->phydev)
731 phy_disconnect(lmac->phydev);
736 static void bgx_set_num_ports(struct bgx *bgx)
740 switch (bgx->qlm_mode) {
743 bgx->lmac_type = BGX_MODE_SGMII;
744 bgx->lane_to_sds = 0;
746 case QLM_MODE_XAUI_1X4:
748 bgx->lmac_type = BGX_MODE_XAUI;
749 bgx->lane_to_sds = 0xE4;
751 case QLM_MODE_RXAUI_2X2:
753 bgx->lmac_type = BGX_MODE_RXAUI;
754 bgx->lane_to_sds = 0xE4;
756 case QLM_MODE_XFI_4X1:
758 bgx->lmac_type = BGX_MODE_XFI;
759 bgx->lane_to_sds = 0;
761 case QLM_MODE_XLAUI_1X4:
763 bgx->lmac_type = BGX_MODE_XLAUI;
764 bgx->lane_to_sds = 0xE4;
766 case QLM_MODE_10G_KR_4X1:
768 bgx->lmac_type = BGX_MODE_10G_KR;
769 bgx->lane_to_sds = 0;
770 bgx->use_training = 1;
772 case QLM_MODE_40G_KR4_1X4:
774 bgx->lmac_type = BGX_MODE_40G_KR;
775 bgx->lane_to_sds = 0xE4;
776 bgx->use_training = 1;
783 /* Check if low level firmware has programmed LMAC count
784 * based on board type, if yes consider that otherwise
785 * the default static values
787 lmac_count = bgx_reg_read(bgx, 0, BGX_CMR_RX_LMACS) & 0x7;
789 bgx->lmac_count = lmac_count;
792 static void bgx_init_hw(struct bgx *bgx)
796 bgx_set_num_ports(bgx);
798 bgx_reg_modify(bgx, 0, BGX_CMR_GLOBAL_CFG, CMR_GLOBAL_CFG_FCS_STRIP);
799 if (bgx_reg_read(bgx, 0, BGX_CMR_BIST_STATUS))
800 dev_err(&bgx->pdev->dev, "BGX%d BIST failed\n", bgx->bgx_id);
802 /* Set lmac type and lane2serdes mapping */
803 for (i = 0; i < bgx->lmac_count; i++) {
804 if (bgx->lmac_type == BGX_MODE_RXAUI) {
806 bgx->lane_to_sds = 0x0e;
808 bgx->lane_to_sds = 0x04;
809 bgx_reg_write(bgx, i, BGX_CMRX_CFG,
810 (bgx->lmac_type << 8) | bgx->lane_to_sds);
813 bgx_reg_write(bgx, i, BGX_CMRX_CFG,
814 (bgx->lmac_type << 8) | (bgx->lane_to_sds + i));
815 bgx->lmac[i].lmacid_bd = lmac_count;
819 bgx_reg_write(bgx, 0, BGX_CMR_TX_LMACS, bgx->lmac_count);
820 bgx_reg_write(bgx, 0, BGX_CMR_RX_LMACS, bgx->lmac_count);
822 /* Set the backpressure AND mask */
823 for (i = 0; i < bgx->lmac_count; i++)
824 bgx_reg_modify(bgx, 0, BGX_CMR_CHAN_MSK_AND,
825 ((1ULL << MAX_BGX_CHANS_PER_LMAC) - 1) <<
826 (i * MAX_BGX_CHANS_PER_LMAC));
828 /* Disable all MAC filtering */
829 for (i = 0; i < RX_DMAC_COUNT; i++)
830 bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + (i * 8), 0x00);
832 /* Disable MAC steering (NCSI traffic) */
833 for (i = 0; i < RX_TRAFFIC_STEER_RULE_COUNT; i++)
834 bgx_reg_write(bgx, 0, BGX_CMR_RX_STREERING + (i * 8), 0x00);
837 static void bgx_get_qlm_mode(struct bgx *bgx)
839 struct device *dev = &bgx->pdev->dev;
843 /* Read LMAC0 type to figure out QLM mode
844 * This is configured by low level firmware
846 lmac_type = bgx_reg_read(bgx, 0, BGX_CMRX_CFG);
847 lmac_type = (lmac_type >> 8) & 0x07;
849 train_en = bgx_reg_read(bgx, 0, BGX_SPUX_BR_PMD_CRTL) &
850 SPU_PMD_CRTL_TRAIN_EN;
854 bgx->qlm_mode = QLM_MODE_SGMII;
855 dev_info(dev, "BGX%d QLM mode: SGMII\n", bgx->bgx_id);
858 bgx->qlm_mode = QLM_MODE_XAUI_1X4;
859 dev_info(dev, "BGX%d QLM mode: XAUI\n", bgx->bgx_id);
862 bgx->qlm_mode = QLM_MODE_RXAUI_2X2;
863 dev_info(dev, "BGX%d QLM mode: RXAUI\n", bgx->bgx_id);
867 bgx->qlm_mode = QLM_MODE_XFI_4X1;
868 dev_info(dev, "BGX%d QLM mode: XFI\n", bgx->bgx_id);
870 bgx->qlm_mode = QLM_MODE_10G_KR_4X1;
871 dev_info(dev, "BGX%d QLM mode: 10G_KR\n", bgx->bgx_id);
876 bgx->qlm_mode = QLM_MODE_XLAUI_1X4;
877 dev_info(dev, "BGX%d QLM mode: XLAUI\n", bgx->bgx_id);
879 bgx->qlm_mode = QLM_MODE_40G_KR4_1X4;
880 dev_info(dev, "BGX%d QLM mode: 40G_KR4\n", bgx->bgx_id);
884 bgx->qlm_mode = QLM_MODE_SGMII;
885 dev_info(dev, "BGX%d QLM default mode: SGMII\n", bgx->bgx_id);
891 static int acpi_get_mac_address(struct device *dev, struct acpi_device *adev,
897 ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev),
898 "mac-address", mac, ETH_ALEN);
902 if (!is_valid_ether_addr(mac)) {
903 dev_err(dev, "MAC address invalid: %pM\n", mac);
908 dev_info(dev, "MAC address set to: %pM\n", mac);
910 memcpy(dst, mac, ETH_ALEN);
915 /* Currently only sets the MAC address. */
916 static acpi_status bgx_acpi_register_phy(acpi_handle handle,
917 u32 lvl, void *context, void **rv)
919 struct bgx *bgx = context;
920 struct device *dev = &bgx->pdev->dev;
921 struct acpi_device *adev;
923 if (acpi_bus_get_device(handle, &adev))
926 acpi_get_mac_address(dev, adev, bgx->lmac[bgx->lmac_count].mac);
928 SET_NETDEV_DEV(&bgx->lmac[bgx->lmac_count].netdev, dev);
930 bgx->lmac[bgx->lmac_count].lmacid = bgx->lmac_count;
936 static acpi_status bgx_acpi_match_id(acpi_handle handle, u32 lvl,
937 void *context, void **ret_val)
939 struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
940 struct bgx *bgx = context;
943 snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id);
944 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &string))) {
945 pr_warn("Invalid link device\n");
949 if (strncmp(string.pointer, bgx_sel, 4))
952 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
953 bgx_acpi_register_phy, NULL, bgx, NULL);
955 kfree(string.pointer);
956 return AE_CTRL_TERMINATE;
959 static int bgx_init_acpi_phy(struct bgx *bgx)
961 acpi_get_devices(NULL, bgx_acpi_match_id, bgx, (void **)NULL);
967 static int bgx_init_acpi_phy(struct bgx *bgx)
972 #endif /* CONFIG_ACPI */
974 #if IS_ENABLED(CONFIG_OF_MDIO)
976 static int bgx_init_of_phy(struct bgx *bgx)
978 struct fwnode_handle *fwn;
979 struct device_node *node = NULL;
982 device_for_each_child_node(&bgx->pdev->dev, fwn) {
983 struct phy_device *pd;
984 struct device_node *phy_np;
987 /* Should always be an OF node. But if it is not, we
988 * cannot handle it, so exit the loop.
990 node = to_of_node(fwn);
994 mac = of_get_mac_address(node);
996 ether_addr_copy(bgx->lmac[lmac].mac, mac);
998 SET_NETDEV_DEV(&bgx->lmac[lmac].netdev, &bgx->pdev->dev);
999 bgx->lmac[lmac].lmacid = lmac;
1001 phy_np = of_parse_phandle(node, "phy-handle", 0);
1002 /* If there is no phy or defective firmware presents
1003 * this cortina phy, for which there is no driver
1004 * support, ignore it.
1007 !of_device_is_compatible(phy_np, "cortina,cs4223-slice")) {
1008 /* Wait until the phy drivers are available */
1009 pd = of_phy_find_device(phy_np);
1012 bgx->lmac[lmac].phydev = pd;
1016 if (lmac == MAX_LMAC_PER_BGX) {
1024 /* We are bailing out, try not to leak device reference counts
1025 * for phy devices we may have already found.
1028 if (bgx->lmac[lmac].phydev) {
1029 put_device(&bgx->lmac[lmac].phydev->mdio.dev);
1030 bgx->lmac[lmac].phydev = NULL;
1035 return -EPROBE_DEFER;
1040 static int bgx_init_of_phy(struct bgx *bgx)
1045 #endif /* CONFIG_OF_MDIO */
1047 static int bgx_init_phy(struct bgx *bgx)
1050 return bgx_init_acpi_phy(bgx);
1052 return bgx_init_of_phy(bgx);
1055 static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1058 struct device *dev = &pdev->dev;
1059 struct bgx *bgx = NULL;
1062 bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL);
1067 pci_set_drvdata(pdev, bgx);
1069 err = pci_enable_device(pdev);
1071 dev_err(dev, "Failed to enable PCI device\n");
1072 pci_set_drvdata(pdev, NULL);
1076 err = pci_request_regions(pdev, DRV_NAME);
1078 dev_err(dev, "PCI request regions failed 0x%x\n", err);
1079 goto err_disable_device;
1082 /* MAP configuration registers */
1083 bgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
1084 if (!bgx->reg_base) {
1085 dev_err(dev, "BGX: Cannot map CSR memory space, aborting\n");
1087 goto err_release_regions;
1089 bgx->bgx_id = (pci_resource_start(pdev, PCI_CFG_REG_BAR_NUM) >> 24) & 1;
1090 bgx->bgx_id += nic_get_node_id(pdev) * MAX_BGX_PER_CN88XX;
1092 bgx_vnic[bgx->bgx_id] = bgx;
1093 bgx_get_qlm_mode(bgx);
1095 err = bgx_init_phy(bgx);
1101 /* Enable all LMACs */
1102 for (lmac = 0; lmac < bgx->lmac_count; lmac++) {
1103 err = bgx_lmac_enable(bgx, lmac);
1105 dev_err(dev, "BGX%d failed to enable lmac%d\n",
1114 bgx_vnic[bgx->bgx_id] = NULL;
1115 err_release_regions:
1116 pci_release_regions(pdev);
1118 pci_disable_device(pdev);
1119 pci_set_drvdata(pdev, NULL);
1123 static void bgx_remove(struct pci_dev *pdev)
1125 struct bgx *bgx = pci_get_drvdata(pdev);
1128 /* Disable all LMACs */
1129 for (lmac = 0; lmac < bgx->lmac_count; lmac++)
1130 bgx_lmac_disable(bgx, lmac);
1132 bgx_vnic[bgx->bgx_id] = NULL;
1133 pci_release_regions(pdev);
1134 pci_disable_device(pdev);
1135 pci_set_drvdata(pdev, NULL);
1138 static struct pci_driver bgx_driver = {
1140 .id_table = bgx_id_table,
1142 .remove = bgx_remove,
1145 static int __init bgx_init_module(void)
1147 pr_info("%s, ver %s\n", DRV_NAME, DRV_VERSION);
1149 return pci_register_driver(&bgx_driver);
1152 static void __exit bgx_cleanup_module(void)
1154 pci_unregister_driver(&bgx_driver);
1157 module_init(bgx_init_module);
1158 module_exit(bgx_cleanup_module);