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 if (bgx_reg_read(bgx
, lmacid
, BGX_SPUX_STATUS2
) & SPU_STATUS2_RCVFLT
)
555 bgx_reg_modify(bgx
, lmacid
,
556 BGX_SPUX_STATUS2
, SPU_STATUS2_RCVFLT
);
557 if (bgx_reg_read(bgx
, lmacid
, BGX_SPUX_STATUS2
) & SPU_STATUS2_RCVFLT
) {
558 dev_err(&bgx
->pdev
->dev
, "Receive fault, retry training\n");
559 if (bgx
->use_training
) {
560 cfg
= bgx_reg_read(bgx
, lmacid
, BGX_SPUX_INT
);
561 if (!(cfg
& (1ull << 13))) {
562 cfg
= (1ull << 13) | (1ull << 14);
563 bgx_reg_write(bgx
, lmacid
, BGX_SPUX_INT
, cfg
);
564 cfg
= bgx_reg_read(bgx
, lmacid
,
565 BGX_SPUX_BR_PMD_CRTL
);
567 bgx_reg_write(bgx
, lmacid
,
568 BGX_SPUX_BR_PMD_CRTL
, cfg
);
575 /* Wait for BGX RX to be idle */
576 if (bgx_poll_reg(bgx
, lmacid
, BGX_SMUX_CTL
, SMU_CTL_RX_IDLE
, false)) {
577 dev_err(&bgx
->pdev
->dev
, "SMU RX not idle\n");
581 /* Wait for BGX TX to be idle */
582 if (bgx_poll_reg(bgx
, lmacid
, BGX_SMUX_CTL
, SMU_CTL_TX_IDLE
, false)) {
583 dev_err(&bgx
->pdev
->dev
, "SMU TX not idle\n");
587 /* Clear receive packet disable */
588 cfg
= bgx_reg_read(bgx
, lmacid
, BGX_SPUX_MISC_CONTROL
);
589 cfg
&= ~SPU_MISC_CTL_RX_DIS
;
590 bgx_reg_write(bgx
, lmacid
, BGX_SPUX_MISC_CONTROL
, cfg
);
592 /* Check for MAC RX faults */
593 cfg
= bgx_reg_read(bgx
, lmacid
, BGX_SMUX_RX_CTL
);
594 /* 0 - Link is okay, 1 - Local fault, 2 - Remote fault */
595 cfg
&= SMU_RX_CTL_STATUS
;
599 /* Rx local/remote fault seen.
600 * Do lmac reinit to see if condition recovers
602 bgx_lmac_xaui_init(bgx
, lmacid
, bgx
->lmac_type
);
607 static void bgx_poll_for_link(struct work_struct
*work
)
610 u64 spu_link
, smu_link
;
612 lmac
= container_of(work
, struct lmac
, dwork
.work
);
614 /* Receive link is latching low. Force it high and verify it */
615 bgx_reg_modify(lmac
->bgx
, lmac
->lmacid
,
616 BGX_SPUX_STATUS1
, SPU_STATUS1_RCV_LNK
);
617 bgx_poll_reg(lmac
->bgx
, lmac
->lmacid
, BGX_SPUX_STATUS1
,
618 SPU_STATUS1_RCV_LNK
, false);
620 spu_link
= bgx_reg_read(lmac
->bgx
, lmac
->lmacid
, BGX_SPUX_STATUS1
);
621 smu_link
= bgx_reg_read(lmac
->bgx
, lmac
->lmacid
, BGX_SMUX_RX_CTL
);
623 if ((spu_link
& SPU_STATUS1_RCV_LNK
) &&
624 !(smu_link
& SMU_RX_CTL_STATUS
)) {
626 if (lmac
->bgx
->lmac_type
== BGX_MODE_XLAUI
)
627 lmac
->last_speed
= 40000;
629 lmac
->last_speed
= 10000;
630 lmac
->last_duplex
= 1;
633 lmac
->last_speed
= SPEED_UNKNOWN
;
634 lmac
->last_duplex
= DUPLEX_UNKNOWN
;
637 if (lmac
->last_link
!= lmac
->link_up
) {
639 if (bgx_xaui_check_link(lmac
)) {
640 /* Errors, clear link_up state */
642 lmac
->last_speed
= SPEED_UNKNOWN
;
643 lmac
->last_duplex
= DUPLEX_UNKNOWN
;
646 lmac
->last_link
= lmac
->link_up
;
649 queue_delayed_work(lmac
->check_link
, &lmac
->dwork
, HZ
* 2);
652 static int bgx_lmac_enable(struct bgx
*bgx
, u8 lmacid
)
657 lmac
= &bgx
->lmac
[lmacid
];
660 if (bgx
->lmac_type
== BGX_MODE_SGMII
) {
662 if (bgx_lmac_sgmii_init(bgx
, lmacid
))
666 if (bgx_lmac_xaui_init(bgx
, lmacid
, bgx
->lmac_type
))
670 if (lmac
->is_sgmii
) {
671 cfg
= bgx_reg_read(bgx
, lmacid
, BGX_GMP_GMI_TXX_APPEND
);
672 cfg
|= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
673 bgx_reg_modify(bgx
, lmacid
, BGX_GMP_GMI_TXX_APPEND
, cfg
);
674 bgx_reg_write(bgx
, lmacid
, BGX_GMP_GMI_TXX_MIN_PKT
, 60 - 1);
676 cfg
= bgx_reg_read(bgx
, lmacid
, BGX_SMUX_TX_APPEND
);
677 cfg
|= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
678 bgx_reg_modify(bgx
, lmacid
, BGX_SMUX_TX_APPEND
, cfg
);
679 bgx_reg_write(bgx
, lmacid
, BGX_SMUX_TX_MIN_PKT
, 60 + 4);
683 bgx_reg_modify(bgx
, lmacid
, BGX_CMRX_CFG
, CMR_EN
);
685 /* Restore default cfg, incase low level firmware changed it */
686 bgx_reg_write(bgx
, lmacid
, BGX_CMRX_RX_DMAC_CTL
, 0x03);
688 if ((bgx
->lmac_type
!= BGX_MODE_XFI
) &&
689 (bgx
->lmac_type
!= BGX_MODE_XLAUI
) &&
690 (bgx
->lmac_type
!= BGX_MODE_40G_KR
) &&
691 (bgx
->lmac_type
!= BGX_MODE_10G_KR
)) {
695 lmac
->phydev
->dev_flags
= 0;
697 if (phy_connect_direct(&lmac
->netdev
, lmac
->phydev
,
699 PHY_INTERFACE_MODE_SGMII
))
702 phy_start_aneg(lmac
->phydev
);
704 lmac
->check_link
= alloc_workqueue("check_link", WQ_UNBOUND
|
706 if (!lmac
->check_link
)
708 INIT_DELAYED_WORK(&lmac
->dwork
, bgx_poll_for_link
);
709 queue_delayed_work(lmac
->check_link
, &lmac
->dwork
, 0);
715 static void bgx_lmac_disable(struct bgx
*bgx
, u8 lmacid
)
720 lmac
= &bgx
->lmac
[lmacid
];
721 if (lmac
->check_link
) {
722 /* Destroy work queue */
723 cancel_delayed_work_sync(&lmac
->dwork
);
724 destroy_workqueue(lmac
->check_link
);
727 /* Disable packet reception */
728 cfg
= bgx_reg_read(bgx
, lmacid
, BGX_CMRX_CFG
);
729 cfg
&= ~CMR_PKT_RX_EN
;
730 bgx_reg_write(bgx
, lmacid
, BGX_CMRX_CFG
, cfg
);
732 /* Give chance for Rx/Tx FIFO to get drained */
733 bgx_poll_reg(bgx
, lmacid
, BGX_CMRX_RX_FIFO_LEN
, (u64
)0x1FFF, true);
734 bgx_poll_reg(bgx
, lmacid
, BGX_CMRX_TX_FIFO_LEN
, (u64
)0x3FFF, true);
736 /* Disable packet transmission */
737 cfg
= bgx_reg_read(bgx
, lmacid
, BGX_CMRX_CFG
);
738 cfg
&= ~CMR_PKT_TX_EN
;
739 bgx_reg_write(bgx
, lmacid
, BGX_CMRX_CFG
, cfg
);
741 /* Disable serdes lanes */
743 bgx_reg_modify(bgx
, lmacid
,
744 BGX_SPUX_CONTROL1
, SPU_CTL_LOW_POWER
);
746 bgx_reg_modify(bgx
, lmacid
,
747 BGX_GMP_PCS_MRX_CTL
, PCS_MRX_CTL_PWR_DN
);
750 cfg
= bgx_reg_read(bgx
, lmacid
, BGX_CMRX_CFG
);
752 bgx_reg_write(bgx
, lmacid
, BGX_CMRX_CFG
, cfg
);
754 bgx_flush_dmac_addrs(bgx
, lmacid
);
756 if ((bgx
->lmac_type
!= BGX_MODE_XFI
) &&
757 (bgx
->lmac_type
!= BGX_MODE_XLAUI
) &&
758 (bgx
->lmac_type
!= BGX_MODE_40G_KR
) &&
759 (bgx
->lmac_type
!= BGX_MODE_10G_KR
) && lmac
->phydev
)
760 phy_disconnect(lmac
->phydev
);
765 static void bgx_set_num_ports(struct bgx
*bgx
)
769 switch (bgx
->qlm_mode
) {
772 bgx
->lmac_type
= BGX_MODE_SGMII
;
773 bgx
->lane_to_sds
= 0;
775 case QLM_MODE_XAUI_1X4
:
777 bgx
->lmac_type
= BGX_MODE_XAUI
;
778 bgx
->lane_to_sds
= 0xE4;
780 case QLM_MODE_RXAUI_2X2
:
782 bgx
->lmac_type
= BGX_MODE_RXAUI
;
783 bgx
->lane_to_sds
= 0xE4;
785 case QLM_MODE_XFI_4X1
:
787 bgx
->lmac_type
= BGX_MODE_XFI
;
788 bgx
->lane_to_sds
= 0;
790 case QLM_MODE_XLAUI_1X4
:
792 bgx
->lmac_type
= BGX_MODE_XLAUI
;
793 bgx
->lane_to_sds
= 0xE4;
795 case QLM_MODE_10G_KR_4X1
:
797 bgx
->lmac_type
= BGX_MODE_10G_KR
;
798 bgx
->lane_to_sds
= 0;
799 bgx
->use_training
= 1;
801 case QLM_MODE_40G_KR4_1X4
:
803 bgx
->lmac_type
= BGX_MODE_40G_KR
;
804 bgx
->lane_to_sds
= 0xE4;
805 bgx
->use_training
= 1;
812 /* Check if low level firmware has programmed LMAC count
813 * based on board type, if yes consider that otherwise
814 * the default static values
816 lmac_count
= bgx_reg_read(bgx
, 0, BGX_CMR_RX_LMACS
) & 0x7;
818 bgx
->lmac_count
= lmac_count
;
821 static void bgx_init_hw(struct bgx
*bgx
)
825 bgx_set_num_ports(bgx
);
827 bgx_reg_modify(bgx
, 0, BGX_CMR_GLOBAL_CFG
, CMR_GLOBAL_CFG_FCS_STRIP
);
828 if (bgx_reg_read(bgx
, 0, BGX_CMR_BIST_STATUS
))
829 dev_err(&bgx
->pdev
->dev
, "BGX%d BIST failed\n", bgx
->bgx_id
);
831 /* Set lmac type and lane2serdes mapping */
832 for (i
= 0; i
< bgx
->lmac_count
; i
++) {
833 if (bgx
->lmac_type
== BGX_MODE_RXAUI
) {
835 bgx
->lane_to_sds
= 0x0e;
837 bgx
->lane_to_sds
= 0x04;
838 bgx_reg_write(bgx
, i
, BGX_CMRX_CFG
,
839 (bgx
->lmac_type
<< 8) | bgx
->lane_to_sds
);
842 bgx_reg_write(bgx
, i
, BGX_CMRX_CFG
,
843 (bgx
->lmac_type
<< 8) | (bgx
->lane_to_sds
+ i
));
844 bgx
->lmac
[i
].lmacid_bd
= lmac_count
;
848 bgx_reg_write(bgx
, 0, BGX_CMR_TX_LMACS
, bgx
->lmac_count
);
849 bgx_reg_write(bgx
, 0, BGX_CMR_RX_LMACS
, bgx
->lmac_count
);
851 /* Set the backpressure AND mask */
852 for (i
= 0; i
< bgx
->lmac_count
; i
++)
853 bgx_reg_modify(bgx
, 0, BGX_CMR_CHAN_MSK_AND
,
854 ((1ULL << MAX_BGX_CHANS_PER_LMAC
) - 1) <<
855 (i
* MAX_BGX_CHANS_PER_LMAC
));
857 /* Disable all MAC filtering */
858 for (i
= 0; i
< RX_DMAC_COUNT
; i
++)
859 bgx_reg_write(bgx
, 0, BGX_CMR_RX_DMACX_CAM
+ (i
* 8), 0x00);
861 /* Disable MAC steering (NCSI traffic) */
862 for (i
= 0; i
< RX_TRAFFIC_STEER_RULE_COUNT
; i
++)
863 bgx_reg_write(bgx
, 0, BGX_CMR_RX_STREERING
+ (i
* 8), 0x00);
866 static void bgx_get_qlm_mode(struct bgx
*bgx
)
868 struct device
*dev
= &bgx
->pdev
->dev
;
872 /* Read LMAC0 type to figure out QLM mode
873 * This is configured by low level firmware
875 lmac_type
= bgx_reg_read(bgx
, 0, BGX_CMRX_CFG
);
876 lmac_type
= (lmac_type
>> 8) & 0x07;
878 train_en
= bgx_reg_read(bgx
, 0, BGX_SPUX_BR_PMD_CRTL
) &
879 SPU_PMD_CRTL_TRAIN_EN
;
883 bgx
->qlm_mode
= QLM_MODE_SGMII
;
884 dev_info(dev
, "BGX%d QLM mode: SGMII\n", bgx
->bgx_id
);
887 bgx
->qlm_mode
= QLM_MODE_XAUI_1X4
;
888 dev_info(dev
, "BGX%d QLM mode: XAUI\n", bgx
->bgx_id
);
891 bgx
->qlm_mode
= QLM_MODE_RXAUI_2X2
;
892 dev_info(dev
, "BGX%d QLM mode: RXAUI\n", bgx
->bgx_id
);
896 bgx
->qlm_mode
= QLM_MODE_XFI_4X1
;
897 dev_info(dev
, "BGX%d QLM mode: XFI\n", bgx
->bgx_id
);
899 bgx
->qlm_mode
= QLM_MODE_10G_KR_4X1
;
900 dev_info(dev
, "BGX%d QLM mode: 10G_KR\n", bgx
->bgx_id
);
905 bgx
->qlm_mode
= QLM_MODE_XLAUI_1X4
;
906 dev_info(dev
, "BGX%d QLM mode: XLAUI\n", bgx
->bgx_id
);
908 bgx
->qlm_mode
= QLM_MODE_40G_KR4_1X4
;
909 dev_info(dev
, "BGX%d QLM mode: 40G_KR4\n", bgx
->bgx_id
);
913 bgx
->qlm_mode
= QLM_MODE_SGMII
;
914 dev_info(dev
, "BGX%d QLM default mode: SGMII\n", bgx
->bgx_id
);
920 static int acpi_get_mac_address(struct device
*dev
, struct acpi_device
*adev
,
926 ret
= fwnode_property_read_u8_array(acpi_fwnode_handle(adev
),
927 "mac-address", mac
, ETH_ALEN
);
931 if (!is_valid_ether_addr(mac
)) {
932 dev_err(dev
, "MAC address invalid: %pM\n", mac
);
937 dev_info(dev
, "MAC address set to: %pM\n", mac
);
939 memcpy(dst
, mac
, ETH_ALEN
);
944 /* Currently only sets the MAC address. */
945 static acpi_status
bgx_acpi_register_phy(acpi_handle handle
,
946 u32 lvl
, void *context
, void **rv
)
948 struct bgx
*bgx
= context
;
949 struct device
*dev
= &bgx
->pdev
->dev
;
950 struct acpi_device
*adev
;
952 if (acpi_bus_get_device(handle
, &adev
))
955 acpi_get_mac_address(dev
, adev
, bgx
->lmac
[bgx
->lmac_count
].mac
);
957 SET_NETDEV_DEV(&bgx
->lmac
[bgx
->lmac_count
].netdev
, dev
);
959 bgx
->lmac
[bgx
->lmac_count
].lmacid
= bgx
->lmac_count
;
965 static acpi_status
bgx_acpi_match_id(acpi_handle handle
, u32 lvl
,
966 void *context
, void **ret_val
)
968 struct acpi_buffer string
= { ACPI_ALLOCATE_BUFFER
, NULL
};
969 struct bgx
*bgx
= context
;
972 snprintf(bgx_sel
, 5, "BGX%d", bgx
->bgx_id
);
973 if (ACPI_FAILURE(acpi_get_name(handle
, ACPI_SINGLE_NAME
, &string
))) {
974 pr_warn("Invalid link device\n");
978 if (strncmp(string
.pointer
, bgx_sel
, 4))
981 acpi_walk_namespace(ACPI_TYPE_DEVICE
, handle
, 1,
982 bgx_acpi_register_phy
, NULL
, bgx
, NULL
);
984 kfree(string
.pointer
);
985 return AE_CTRL_TERMINATE
;
988 static int bgx_init_acpi_phy(struct bgx
*bgx
)
990 acpi_get_devices(NULL
, bgx_acpi_match_id
, bgx
, (void **)NULL
);
996 static int bgx_init_acpi_phy(struct bgx
*bgx
)
1001 #endif /* CONFIG_ACPI */
1003 #if IS_ENABLED(CONFIG_OF_MDIO)
1005 static int bgx_init_of_phy(struct bgx
*bgx
)
1007 struct fwnode_handle
*fwn
;
1008 struct device_node
*node
= NULL
;
1011 device_for_each_child_node(&bgx
->pdev
->dev
, fwn
) {
1012 struct phy_device
*pd
;
1013 struct device_node
*phy_np
;
1016 /* Should always be an OF node. But if it is not, we
1017 * cannot handle it, so exit the loop.
1019 node
= to_of_node(fwn
);
1023 mac
= of_get_mac_address(node
);
1025 ether_addr_copy(bgx
->lmac
[lmac
].mac
, mac
);
1027 SET_NETDEV_DEV(&bgx
->lmac
[lmac
].netdev
, &bgx
->pdev
->dev
);
1028 bgx
->lmac
[lmac
].lmacid
= lmac
;
1030 phy_np
= of_parse_phandle(node
, "phy-handle", 0);
1031 /* If there is no phy or defective firmware presents
1032 * this cortina phy, for which there is no driver
1033 * support, ignore it.
1036 !of_device_is_compatible(phy_np
, "cortina,cs4223-slice")) {
1037 /* Wait until the phy drivers are available */
1038 pd
= of_phy_find_device(phy_np
);
1041 bgx
->lmac
[lmac
].phydev
= pd
;
1045 if (lmac
== MAX_LMAC_PER_BGX
) {
1053 /* We are bailing out, try not to leak device reference counts
1054 * for phy devices we may have already found.
1057 if (bgx
->lmac
[lmac
].phydev
) {
1058 put_device(&bgx
->lmac
[lmac
].phydev
->mdio
.dev
);
1059 bgx
->lmac
[lmac
].phydev
= NULL
;
1064 return -EPROBE_DEFER
;
1069 static int bgx_init_of_phy(struct bgx
*bgx
)
1074 #endif /* CONFIG_OF_MDIO */
1076 static int bgx_init_phy(struct bgx
*bgx
)
1079 return bgx_init_acpi_phy(bgx
);
1081 return bgx_init_of_phy(bgx
);
1084 static int bgx_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
1087 struct device
*dev
= &pdev
->dev
;
1088 struct bgx
*bgx
= NULL
;
1091 bgx
= devm_kzalloc(dev
, sizeof(*bgx
), GFP_KERNEL
);
1096 pci_set_drvdata(pdev
, bgx
);
1098 err
= pci_enable_device(pdev
);
1100 dev_err(dev
, "Failed to enable PCI device\n");
1101 pci_set_drvdata(pdev
, NULL
);
1105 err
= pci_request_regions(pdev
, DRV_NAME
);
1107 dev_err(dev
, "PCI request regions failed 0x%x\n", err
);
1108 goto err_disable_device
;
1111 /* MAP configuration registers */
1112 bgx
->reg_base
= pcim_iomap(pdev
, PCI_CFG_REG_BAR_NUM
, 0);
1113 if (!bgx
->reg_base
) {
1114 dev_err(dev
, "BGX: Cannot map CSR memory space, aborting\n");
1116 goto err_release_regions
;
1118 bgx
->bgx_id
= (pci_resource_start(pdev
, PCI_CFG_REG_BAR_NUM
) >> 24) & 1;
1119 bgx
->bgx_id
+= nic_get_node_id(pdev
) * MAX_BGX_PER_CN88XX
;
1121 bgx_vnic
[bgx
->bgx_id
] = bgx
;
1122 bgx_get_qlm_mode(bgx
);
1124 err
= bgx_init_phy(bgx
);
1130 /* Enable all LMACs */
1131 for (lmac
= 0; lmac
< bgx
->lmac_count
; lmac
++) {
1132 err
= bgx_lmac_enable(bgx
, lmac
);
1134 dev_err(dev
, "BGX%d failed to enable lmac%d\n",
1143 bgx_vnic
[bgx
->bgx_id
] = NULL
;
1144 err_release_regions
:
1145 pci_release_regions(pdev
);
1147 pci_disable_device(pdev
);
1148 pci_set_drvdata(pdev
, NULL
);
1152 static void bgx_remove(struct pci_dev
*pdev
)
1154 struct bgx
*bgx
= pci_get_drvdata(pdev
);
1157 /* Disable all LMACs */
1158 for (lmac
= 0; lmac
< bgx
->lmac_count
; lmac
++)
1159 bgx_lmac_disable(bgx
, lmac
);
1161 bgx_vnic
[bgx
->bgx_id
] = NULL
;
1162 pci_release_regions(pdev
);
1163 pci_disable_device(pdev
);
1164 pci_set_drvdata(pdev
, NULL
);
1167 static struct pci_driver bgx_driver
= {
1169 .id_table
= bgx_id_table
,
1171 .remove
= bgx_remove
,
1174 static int __init
bgx_init_module(void)
1176 pr_info("%s, ver %s\n", DRV_NAME
, DRV_VERSION
);
1178 return pci_register_driver(&bgx_driver
);
1181 static void __exit
bgx_cleanup_module(void)
1183 pci_unregister_driver(&bgx_driver
);
1186 module_init(bgx_init_module
);
1187 module_exit(bgx_cleanup_module
);