1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2015 Cavium, Inc.
4  */
5 
6 #include <linux/acpi.h>
7 #include <linux/module.h>
8 #include <linux/interrupt.h>
9 #include <linux/pci.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/phy.h>
13 #include <linux/of.h>
14 #include <linux/of_mdio.h>
15 #include <linux/of_net.h>
16 
17 #include "nic_reg.h"
18 #include "nic.h"
19 #include "thunder_bgx.h"
20 
21 #define DRV_NAME	"thunder_bgx"
22 #define DRV_VERSION	"1.0"
23 
24 /* RX_DMAC_CTL configuration */
25 enum MCAST_MODE {
26 		MCAST_MODE_REJECT = 0x0,
27 		MCAST_MODE_ACCEPT = 0x1,
28 		MCAST_MODE_CAM_FILTER = 0x2,
29 		RSVD = 0x3
30 };
31 
32 #define BCAST_ACCEPT      BIT(0)
33 #define CAM_ACCEPT        BIT(3)
34 #define MCAST_MODE_MASK   0x3
35 #define BGX_MCAST_MODE(x) (x << 1)
36 
37 struct dmac_map {
38 	u64                     vf_map;
39 	u64                     dmac;
40 };
41 
42 struct lmac {
43 	struct bgx		*bgx;
44 	/* actual number of DMACs configured */
45 	u8			dmacs_cfg;
46 	/* overal number of possible DMACs could be configured per LMAC */
47 	u8                      dmacs_count;
48 	struct dmac_map         *dmacs; /* DMAC:VFs tracking filter array */
49 	u8			mac[ETH_ALEN];
50 	u8                      lmac_type;
51 	u8                      lane_to_sds;
52 	bool                    use_training;
53 	bool                    autoneg;
54 	bool			link_up;
55 	int			lmacid; /* ID within BGX */
56 	int			lmacid_bd; /* ID on board */
57 	struct net_device       netdev;
58 	struct phy_device       *phydev;
59 	unsigned int            last_duplex;
60 	unsigned int            last_link;
61 	unsigned int            last_speed;
62 	bool			is_sgmii;
63 	struct delayed_work	dwork;
64 	struct workqueue_struct *check_link;
65 };
66 
67 struct bgx {
68 	u8			bgx_id;
69 	struct	lmac		lmac[MAX_LMAC_PER_BGX];
70 	u8			lmac_count;
71 	u8			max_lmac;
72 	u8                      acpi_lmac_idx;
73 	void __iomem		*reg_base;
74 	struct pci_dev		*pdev;
75 	bool                    is_dlm;
76 	bool                    is_rgx;
77 };
78 
79 static struct bgx *bgx_vnic[MAX_BGX_THUNDER];
80 static int lmac_count; /* Total no of LMACs in system */
81 
82 static int bgx_xaui_check_link(struct lmac *lmac);
83 
84 /* Supported devices */
85 static const struct pci_device_id bgx_id_table[] = {
86 	{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_BGX) },
87 	{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_RGX) },
88 	{ 0, }  /* end of table */
89 };
90 
91 MODULE_AUTHOR("Cavium Inc");
92 MODULE_DESCRIPTION("Cavium Thunder BGX/MAC Driver");
93 MODULE_LICENSE("GPL v2");
94 MODULE_VERSION(DRV_VERSION);
95 MODULE_DEVICE_TABLE(pci, bgx_id_table);
96 
97 /* The Cavium ThunderX network controller can *only* be found in SoCs
98  * containing the ThunderX ARM64 CPU implementation.  All accesses to the device
99  * registers on this platform are implicitly strongly ordered with respect
100  * to memory accesses. So writeq_relaxed() and readq_relaxed() are safe to use
101  * with no memory barriers in this driver.  The readq()/writeq() functions add
102  * explicit ordering operation which in this case are redundant, and only
103  * add overhead.
104  */
105 
106 /* Register read/write APIs */
bgx_reg_read(struct bgx * bgx,u8 lmac,u64 offset)107 static u64 bgx_reg_read(struct bgx *bgx, u8 lmac, u64 offset)
108 {
109 	void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
110 
111 	return readq_relaxed(addr);
112 }
113 
bgx_reg_write(struct bgx * bgx,u8 lmac,u64 offset,u64 val)114 static void bgx_reg_write(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
115 {
116 	void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
117 
118 	writeq_relaxed(val, addr);
119 }
120 
bgx_reg_modify(struct bgx * bgx,u8 lmac,u64 offset,u64 val)121 static void bgx_reg_modify(struct bgx *bgx, u8 lmac, u64 offset, u64 val)
122 {
123 	void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset;
124 
125 	writeq_relaxed(val | readq_relaxed(addr), addr);
126 }
127 
bgx_poll_reg(struct bgx * bgx,u8 lmac,u64 reg,u64 mask,bool zero)128 static int bgx_poll_reg(struct bgx *bgx, u8 lmac, u64 reg, u64 mask, bool zero)
129 {
130 	int timeout = 100;
131 	u64 reg_val;
132 
133 	while (timeout) {
134 		reg_val = bgx_reg_read(bgx, lmac, reg);
135 		if (zero && !(reg_val & mask))
136 			return 0;
137 		if (!zero && (reg_val & mask))
138 			return 0;
139 		usleep_range(1000, 2000);
140 		timeout--;
141 	}
142 	return 1;
143 }
144 
145 static int max_bgx_per_node;
set_max_bgx_per_node(struct pci_dev * pdev)146 static void set_max_bgx_per_node(struct pci_dev *pdev)
147 {
148 	u16 sdevid;
149 
150 	if (max_bgx_per_node)
151 		return;
152 
153 	pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &sdevid);
154 	switch (sdevid) {
155 	case PCI_SUBSYS_DEVID_81XX_BGX:
156 	case PCI_SUBSYS_DEVID_81XX_RGX:
157 		max_bgx_per_node = MAX_BGX_PER_CN81XX;
158 		break;
159 	case PCI_SUBSYS_DEVID_83XX_BGX:
160 		max_bgx_per_node = MAX_BGX_PER_CN83XX;
161 		break;
162 	case PCI_SUBSYS_DEVID_88XX_BGX:
163 	default:
164 		max_bgx_per_node = MAX_BGX_PER_CN88XX;
165 		break;
166 	}
167 }
168 
get_bgx(int node,int bgx_idx)169 static struct bgx *get_bgx(int node, int bgx_idx)
170 {
171 	int idx = (node * max_bgx_per_node) + bgx_idx;
172 
173 	return bgx_vnic[idx];
174 }
175 
176 /* Return number of BGX present in HW */
bgx_get_map(int node)177 unsigned bgx_get_map(int node)
178 {
179 	int i;
180 	unsigned map = 0;
181 
182 	for (i = 0; i < max_bgx_per_node; i++) {
183 		if (bgx_vnic[(node * max_bgx_per_node) + i])
184 			map |= (1 << i);
185 	}
186 
187 	return map;
188 }
189 EXPORT_SYMBOL(bgx_get_map);
190 
191 /* Return number of LMAC configured for this BGX */
bgx_get_lmac_count(int node,int bgx_idx)192 int bgx_get_lmac_count(int node, int bgx_idx)
193 {
194 	struct bgx *bgx;
195 
196 	bgx = get_bgx(node, bgx_idx);
197 	if (bgx)
198 		return bgx->lmac_count;
199 
200 	return 0;
201 }
202 EXPORT_SYMBOL(bgx_get_lmac_count);
203 
204 /* Returns the current link status of LMAC */
bgx_get_lmac_link_state(int node,int bgx_idx,int lmacid,void * status)205 void bgx_get_lmac_link_state(int node, int bgx_idx, int lmacid, void *status)
206 {
207 	struct bgx_link_status *link = (struct bgx_link_status *)status;
208 	struct bgx *bgx;
209 	struct lmac *lmac;
210 
211 	bgx = get_bgx(node, bgx_idx);
212 	if (!bgx)
213 		return;
214 
215 	lmac = &bgx->lmac[lmacid];
216 	link->mac_type = lmac->lmac_type;
217 	link->link_up = lmac->link_up;
218 	link->duplex = lmac->last_duplex;
219 	link->speed = lmac->last_speed;
220 }
221 EXPORT_SYMBOL(bgx_get_lmac_link_state);
222 
bgx_get_lmac_mac(int node,int bgx_idx,int lmacid)223 const u8 *bgx_get_lmac_mac(int node, int bgx_idx, int lmacid)
224 {
225 	struct bgx *bgx = get_bgx(node, bgx_idx);
226 
227 	if (bgx)
228 		return bgx->lmac[lmacid].mac;
229 
230 	return NULL;
231 }
232 EXPORT_SYMBOL(bgx_get_lmac_mac);
233 
bgx_set_lmac_mac(int node,int bgx_idx,int lmacid,const u8 * mac)234 void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac)
235 {
236 	struct bgx *bgx = get_bgx(node, bgx_idx);
237 
238 	if (!bgx)
239 		return;
240 
241 	ether_addr_copy(bgx->lmac[lmacid].mac, mac);
242 }
243 EXPORT_SYMBOL(bgx_set_lmac_mac);
244 
bgx_flush_dmac_cam_filter(struct bgx * bgx,int lmacid)245 static void bgx_flush_dmac_cam_filter(struct bgx *bgx, int lmacid)
246 {
247 	struct lmac *lmac = NULL;
248 	u8  idx = 0;
249 
250 	lmac = &bgx->lmac[lmacid];
251 	/* reset CAM filters */
252 	for (idx = 0; idx < lmac->dmacs_count; idx++)
253 		bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM +
254 			      ((lmacid * lmac->dmacs_count) + idx) *
255 			      sizeof(u64), 0);
256 }
257 
bgx_lmac_remove_filters(struct lmac * lmac,u8 vf_id)258 static void bgx_lmac_remove_filters(struct lmac *lmac, u8 vf_id)
259 {
260 	int i = 0;
261 
262 	if (!lmac)
263 		return;
264 
265 	/* We've got reset filters request from some of attached VF, while the
266 	 * others might want to keep their configuration. So in this case lets
267 	 * iterate over all of configured filters and decrease number of
268 	 * referencies. if some addresses get zero refs remove them from list
269 	 */
270 	for (i = lmac->dmacs_cfg - 1; i >= 0; i--) {
271 		lmac->dmacs[i].vf_map &= ~BIT_ULL(vf_id);
272 		if (!lmac->dmacs[i].vf_map) {
273 			lmac->dmacs_cfg--;
274 			lmac->dmacs[i].dmac = 0;
275 			lmac->dmacs[i].vf_map = 0;
276 		}
277 	}
278 }
279 
bgx_lmac_save_filter(struct lmac * lmac,u64 dmac,u8 vf_id)280 static int bgx_lmac_save_filter(struct lmac *lmac, u64 dmac, u8 vf_id)
281 {
282 	u8 i = 0;
283 
284 	if (!lmac)
285 		return -1;
286 
287 	/* At the same time we could have several VFs 'attached' to some
288 	 * particular LMAC, and each VF is represented as network interface
289 	 * for kernel. So from user perspective it should be possible to
290 	 * manipulate with its' (VF) receive modes. However from PF
291 	 * driver perspective we need to keep track of filter configurations
292 	 * for different VFs to prevent filter values dupes
293 	 */
294 	for (i = 0; i < lmac->dmacs_cfg; i++) {
295 		if (lmac->dmacs[i].dmac == dmac) {
296 			lmac->dmacs[i].vf_map |= BIT_ULL(vf_id);
297 			return -1;
298 		}
299 	}
300 
301 	if (!(lmac->dmacs_cfg < lmac->dmacs_count))
302 		return -1;
303 
304 	/* keep it for further tracking */
305 	lmac->dmacs[lmac->dmacs_cfg].dmac = dmac;
306 	lmac->dmacs[lmac->dmacs_cfg].vf_map = BIT_ULL(vf_id);
307 	lmac->dmacs_cfg++;
308 	return 0;
309 }
310 
bgx_set_dmac_cam_filter_mac(struct bgx * bgx,int lmacid,u64 cam_dmac,u8 idx)311 static int bgx_set_dmac_cam_filter_mac(struct bgx *bgx, int lmacid,
312 				       u64 cam_dmac, u8 idx)
313 {
314 	struct lmac *lmac = NULL;
315 	u64 cfg = 0;
316 
317 	/* skip zero addresses as meaningless */
318 	if (!cam_dmac || !bgx)
319 		return -1;
320 
321 	lmac = &bgx->lmac[lmacid];
322 
323 	/* configure DCAM filtering for designated LMAC */
324 	cfg = RX_DMACX_CAM_LMACID(lmacid & LMAC_ID_MASK) |
325 		RX_DMACX_CAM_EN | cam_dmac;
326 	bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM +
327 		      ((lmacid * lmac->dmacs_count) + idx) * sizeof(u64), cfg);
328 	return 0;
329 }
330 
bgx_set_dmac_cam_filter(int node,int bgx_idx,int lmacid,u64 cam_dmac,u8 vf_id)331 void bgx_set_dmac_cam_filter(int node, int bgx_idx, int lmacid,
332 			     u64 cam_dmac, u8 vf_id)
333 {
334 	struct bgx *bgx = get_bgx(node, bgx_idx);
335 	struct lmac *lmac = NULL;
336 
337 	if (!bgx)
338 		return;
339 
340 	lmac = &bgx->lmac[lmacid];
341 
342 	if (!cam_dmac)
343 		cam_dmac = ether_addr_to_u64(lmac->mac);
344 
345 	/* since we might have several VFs attached to particular LMAC
346 	 * and kernel could call mcast config for each of them with the
347 	 * same MAC, check if requested MAC is already in filtering list and
348 	 * updare/prepare list of MACs to be applied later to HW filters
349 	 */
350 	bgx_lmac_save_filter(lmac, cam_dmac, vf_id);
351 }
352 EXPORT_SYMBOL(bgx_set_dmac_cam_filter);
353 
bgx_set_xcast_mode(int node,int bgx_idx,int lmacid,u8 mode)354 void bgx_set_xcast_mode(int node, int bgx_idx, int lmacid, u8 mode)
355 {
356 	struct bgx *bgx = get_bgx(node, bgx_idx);
357 	struct lmac *lmac = NULL;
358 	u64 cfg = 0;
359 	u8 i = 0;
360 
361 	if (!bgx)
362 		return;
363 
364 	lmac = &bgx->lmac[lmacid];
365 
366 	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL);
367 	if (mode & BGX_XCAST_BCAST_ACCEPT)
368 		cfg |= BCAST_ACCEPT;
369 	else
370 		cfg &= ~BCAST_ACCEPT;
371 
372 	/* disable all MCASTs and DMAC filtering */
373 	cfg &= ~(CAM_ACCEPT | BGX_MCAST_MODE(MCAST_MODE_MASK));
374 
375 	/* check requested bits and set filtergin mode appropriately */
376 	if (mode & (BGX_XCAST_MCAST_ACCEPT)) {
377 		cfg |= (BGX_MCAST_MODE(MCAST_MODE_ACCEPT));
378 	} else if (mode & BGX_XCAST_MCAST_FILTER) {
379 		cfg |= (BGX_MCAST_MODE(MCAST_MODE_CAM_FILTER) | CAM_ACCEPT);
380 		for (i = 0; i < lmac->dmacs_cfg; i++)
381 			bgx_set_dmac_cam_filter_mac(bgx, lmacid,
382 						    lmac->dmacs[i].dmac, i);
383 	}
384 	bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, cfg);
385 }
386 EXPORT_SYMBOL(bgx_set_xcast_mode);
387 
bgx_reset_xcast_mode(int node,int bgx_idx,int lmacid,u8 vf_id)388 void bgx_reset_xcast_mode(int node, int bgx_idx, int lmacid, u8 vf_id)
389 {
390 	struct bgx *bgx = get_bgx(node, bgx_idx);
391 
392 	if (!bgx)
393 		return;
394 
395 	bgx_lmac_remove_filters(&bgx->lmac[lmacid], vf_id);
396 	bgx_flush_dmac_cam_filter(bgx, lmacid);
397 	bgx_set_xcast_mode(node, bgx_idx, lmacid,
398 			   (BGX_XCAST_BCAST_ACCEPT | BGX_XCAST_MCAST_ACCEPT));
399 }
400 EXPORT_SYMBOL(bgx_reset_xcast_mode);
401 
bgx_lmac_rx_tx_enable(int node,int bgx_idx,int lmacid,bool enable)402 void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable)
403 {
404 	struct bgx *bgx = get_bgx(node, bgx_idx);
405 	struct lmac *lmac;
406 	u64 cfg;
407 
408 	if (!bgx)
409 		return;
410 	lmac = &bgx->lmac[lmacid];
411 
412 	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
413 	if (enable) {
414 		cfg |= CMR_PKT_RX_EN | CMR_PKT_TX_EN;
415 
416 		/* enable TX FIFO Underflow interrupt */
417 		bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_INT_ENA_W1S,
418 			       GMI_TXX_INT_UNDFLW);
419 	} else {
420 		cfg &= ~(CMR_PKT_RX_EN | CMR_PKT_TX_EN);
421 
422 		/* Disable TX FIFO Underflow interrupt */
423 		bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_INT_ENA_W1C,
424 			       GMI_TXX_INT_UNDFLW);
425 	}
426 	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
427 
428 	if (bgx->is_rgx)
429 		xcv_setup_link(enable ? lmac->link_up : 0, lmac->last_speed);
430 }
431 EXPORT_SYMBOL(bgx_lmac_rx_tx_enable);
432 
433 /* Enables or disables timestamp insertion by BGX for Rx packets */
bgx_config_timestamping(int node,int bgx_idx,int lmacid,bool enable)434 void bgx_config_timestamping(int node, int bgx_idx, int lmacid, bool enable)
435 {
436 	struct bgx *bgx = get_bgx(node, bgx_idx);
437 	struct lmac *lmac;
438 	u64 csr_offset, cfg;
439 
440 	if (!bgx)
441 		return;
442 
443 	lmac = &bgx->lmac[lmacid];
444 
445 	if (lmac->lmac_type == BGX_MODE_SGMII ||
446 	    lmac->lmac_type == BGX_MODE_QSGMII ||
447 	    lmac->lmac_type == BGX_MODE_RGMII)
448 		csr_offset = BGX_GMP_GMI_RXX_FRM_CTL;
449 	else
450 		csr_offset = BGX_SMUX_RX_FRM_CTL;
451 
452 	cfg = bgx_reg_read(bgx, lmacid, csr_offset);
453 
454 	if (enable)
455 		cfg |= BGX_PKT_RX_PTP_EN;
456 	else
457 		cfg &= ~BGX_PKT_RX_PTP_EN;
458 	bgx_reg_write(bgx, lmacid, csr_offset, cfg);
459 }
460 EXPORT_SYMBOL(bgx_config_timestamping);
461 
bgx_lmac_get_pfc(int node,int bgx_idx,int lmacid,void * pause)462 void bgx_lmac_get_pfc(int node, int bgx_idx, int lmacid, void *pause)
463 {
464 	struct pfc *pfc = (struct pfc *)pause;
465 	struct bgx *bgx = get_bgx(node, bgx_idx);
466 	struct lmac *lmac;
467 	u64 cfg;
468 
469 	if (!bgx)
470 		return;
471 	lmac = &bgx->lmac[lmacid];
472 	if (lmac->is_sgmii)
473 		return;
474 
475 	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_CBFC_CTL);
476 	pfc->fc_rx = cfg & RX_EN;
477 	pfc->fc_tx = cfg & TX_EN;
478 	pfc->autoneg = 0;
479 }
480 EXPORT_SYMBOL(bgx_lmac_get_pfc);
481 
bgx_lmac_set_pfc(int node,int bgx_idx,int lmacid,void * pause)482 void bgx_lmac_set_pfc(int node, int bgx_idx, int lmacid, void *pause)
483 {
484 	struct pfc *pfc = (struct pfc *)pause;
485 	struct bgx *bgx = get_bgx(node, bgx_idx);
486 	struct lmac *lmac;
487 	u64 cfg;
488 
489 	if (!bgx)
490 		return;
491 	lmac = &bgx->lmac[lmacid];
492 	if (lmac->is_sgmii)
493 		return;
494 
495 	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_CBFC_CTL);
496 	cfg &= ~(RX_EN | TX_EN);
497 	cfg |= (pfc->fc_rx ? RX_EN : 0x00);
498 	cfg |= (pfc->fc_tx ? TX_EN : 0x00);
499 	bgx_reg_write(bgx, lmacid, BGX_SMUX_CBFC_CTL, cfg);
500 }
501 EXPORT_SYMBOL(bgx_lmac_set_pfc);
502 
bgx_sgmii_change_link_state(struct lmac * lmac)503 static void bgx_sgmii_change_link_state(struct lmac *lmac)
504 {
505 	struct bgx *bgx = lmac->bgx;
506 	u64 cmr_cfg;
507 	u64 port_cfg = 0;
508 	u64 misc_ctl = 0;
509 	bool tx_en, rx_en;
510 
511 	cmr_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG);
512 	tx_en = cmr_cfg & CMR_PKT_TX_EN;
513 	rx_en = cmr_cfg & CMR_PKT_RX_EN;
514 	cmr_cfg &= ~(CMR_PKT_RX_EN | CMR_PKT_TX_EN);
515 	bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
516 
517 	/* Wait for BGX RX to be idle */
518 	if (bgx_poll_reg(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG,
519 			 GMI_PORT_CFG_RX_IDLE, false)) {
520 		dev_err(&bgx->pdev->dev, "BGX%d LMAC%d GMI RX not idle\n",
521 			bgx->bgx_id, lmac->lmacid);
522 		return;
523 	}
524 
525 	/* Wait for BGX TX to be idle */
526 	if (bgx_poll_reg(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG,
527 			 GMI_PORT_CFG_TX_IDLE, false)) {
528 		dev_err(&bgx->pdev->dev, "BGX%d LMAC%d GMI TX not idle\n",
529 			bgx->bgx_id, lmac->lmacid);
530 		return;
531 	}
532 
533 	port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG);
534 	misc_ctl = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL);
535 
536 	if (lmac->link_up) {
537 		misc_ctl &= ~PCS_MISC_CTL_GMX_ENO;
538 		port_cfg &= ~GMI_PORT_CFG_DUPLEX;
539 		port_cfg |=  (lmac->last_duplex << 2);
540 	} else {
541 		misc_ctl |= PCS_MISC_CTL_GMX_ENO;
542 	}
543 
544 	switch (lmac->last_speed) {
545 	case 10:
546 		port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
547 		port_cfg |= GMI_PORT_CFG_SPEED_MSB;  /* speed_msb 1 */
548 		port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
549 		misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
550 		misc_ctl |= 50; /* samp_pt */
551 		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
552 		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
553 		break;
554 	case 100:
555 		port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */
556 		port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
557 		port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */
558 		misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
559 		misc_ctl |= 5; /* samp_pt */
560 		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64);
561 		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0);
562 		break;
563 	case 1000:
564 		port_cfg |= GMI_PORT_CFG_SPEED; /* speed 1 */
565 		port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */
566 		port_cfg |= GMI_PORT_CFG_SLOT_TIME; /* slottime 1 */
567 		misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK;
568 		misc_ctl |= 1; /* samp_pt */
569 		bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 512);
570 		if (lmac->last_duplex)
571 			bgx_reg_write(bgx, lmac->lmacid,
572 				      BGX_GMP_GMI_TXX_BURST, 0);
573 		else
574 			bgx_reg_write(bgx, lmac->lmacid,
575 				      BGX_GMP_GMI_TXX_BURST, 8192);
576 		break;
577 	default:
578 		break;
579 	}
580 	bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL, misc_ctl);
581 	bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG, port_cfg);
582 
583 	/* Restore CMR config settings */
584 	cmr_cfg |= (rx_en ? CMR_PKT_RX_EN : 0) | (tx_en ? CMR_PKT_TX_EN : 0);
585 	bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg);
586 
587 	if (bgx->is_rgx && (cmr_cfg & (CMR_PKT_RX_EN | CMR_PKT_TX_EN)))
588 		xcv_setup_link(lmac->link_up, lmac->last_speed);
589 }
590 
bgx_lmac_handler(struct net_device * netdev)591 static void bgx_lmac_handler(struct net_device *netdev)
592 {
593 	struct lmac *lmac = container_of(netdev, struct lmac, netdev);
594 	struct phy_device *phydev;
595 	int link_changed = 0;
596 
597 	phydev = lmac->phydev;
598 
599 	if (!phydev->link && lmac->last_link)
600 		link_changed = -1;
601 
602 	if (phydev->link &&
603 	    (lmac->last_duplex != phydev->duplex ||
604 	     lmac->last_link != phydev->link ||
605 	     lmac->last_speed != phydev->speed)) {
606 			link_changed = 1;
607 	}
608 
609 	lmac->last_link = phydev->link;
610 	lmac->last_speed = phydev->speed;
611 	lmac->last_duplex = phydev->duplex;
612 
613 	if (!link_changed)
614 		return;
615 
616 	if (link_changed > 0)
617 		lmac->link_up = true;
618 	else
619 		lmac->link_up = false;
620 
621 	if (lmac->is_sgmii)
622 		bgx_sgmii_change_link_state(lmac);
623 	else
624 		bgx_xaui_check_link(lmac);
625 }
626 
bgx_get_rx_stats(int node,int bgx_idx,int lmac,int idx)627 u64 bgx_get_rx_stats(int node, int bgx_idx, int lmac, int idx)
628 {
629 	struct bgx *bgx;
630 
631 	bgx = get_bgx(node, bgx_idx);
632 	if (!bgx)
633 		return 0;
634 
635 	if (idx > 8)
636 		lmac = 0;
637 	return bgx_reg_read(bgx, lmac, BGX_CMRX_RX_STAT0 + (idx * 8));
638 }
639 EXPORT_SYMBOL(bgx_get_rx_stats);
640 
bgx_get_tx_stats(int node,int bgx_idx,int lmac,int idx)641 u64 bgx_get_tx_stats(int node, int bgx_idx, int lmac, int idx)
642 {
643 	struct bgx *bgx;
644 
645 	bgx = get_bgx(node, bgx_idx);
646 	if (!bgx)
647 		return 0;
648 
649 	return bgx_reg_read(bgx, lmac, BGX_CMRX_TX_STAT0 + (idx * 8));
650 }
651 EXPORT_SYMBOL(bgx_get_tx_stats);
652 
653 /* Configure BGX LMAC in internal loopback mode */
bgx_lmac_internal_loopback(int node,int bgx_idx,int lmac_idx,bool enable)654 void bgx_lmac_internal_loopback(int node, int bgx_idx,
655 				int lmac_idx, bool enable)
656 {
657 	struct bgx *bgx;
658 	struct lmac *lmac;
659 	u64    cfg;
660 
661 	bgx = get_bgx(node, bgx_idx);
662 	if (!bgx)
663 		return;
664 
665 	lmac = &bgx->lmac[lmac_idx];
666 	if (lmac->is_sgmii) {
667 		cfg = bgx_reg_read(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL);
668 		if (enable)
669 			cfg |= PCS_MRX_CTL_LOOPBACK1;
670 		else
671 			cfg &= ~PCS_MRX_CTL_LOOPBACK1;
672 		bgx_reg_write(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL, cfg);
673 	} else {
674 		cfg = bgx_reg_read(bgx, lmac_idx, BGX_SPUX_CONTROL1);
675 		if (enable)
676 			cfg |= SPU_CTL_LOOPBACK;
677 		else
678 			cfg &= ~SPU_CTL_LOOPBACK;
679 		bgx_reg_write(bgx, lmac_idx, BGX_SPUX_CONTROL1, cfg);
680 	}
681 }
682 EXPORT_SYMBOL(bgx_lmac_internal_loopback);
683 
bgx_lmac_sgmii_init(struct bgx * bgx,struct lmac * lmac)684 static int bgx_lmac_sgmii_init(struct bgx *bgx, struct lmac *lmac)
685 {
686 	int lmacid = lmac->lmacid;
687 	u64 cfg;
688 
689 	bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_THRESH, 0x30);
690 	/* max packet size */
691 	bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_RXX_JABBER, MAX_FRAME_SIZE);
692 
693 	/* Disable frame alignment if using preamble */
694 	cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
695 	if (cfg & 1)
696 		bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_SGMII_CTL, 0);
697 
698 	/* Enable lmac */
699 	bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
700 
701 	/* PCS reset */
702 	bgx_reg_modify(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_RESET);
703 	if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_CTL,
704 			 PCS_MRX_CTL_RESET, true)) {
705 		dev_err(&bgx->pdev->dev, "BGX PCS reset not completed\n");
706 		return -1;
707 	}
708 
709 	/* power down, reset autoneg, autoneg enable */
710 	cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MRX_CTL);
711 	cfg &= ~PCS_MRX_CTL_PWR_DN;
712 	cfg |= PCS_MRX_CTL_RST_AN;
713 	if (lmac->phydev) {
714 		cfg |= PCS_MRX_CTL_AN_EN;
715 	} else {
716 		/* In scenarios where PHY driver is not present or it's a
717 		 * non-standard PHY, FW sets AN_EN to inform Linux driver
718 		 * to do auto-neg and link polling or not.
719 		 */
720 		if (cfg & PCS_MRX_CTL_AN_EN)
721 			lmac->autoneg = true;
722 	}
723 	bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, cfg);
724 
725 	if (lmac->lmac_type == BGX_MODE_QSGMII) {
726 		/* Disable disparity check for QSGMII */
727 		cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MISCX_CTL);
728 		cfg &= ~PCS_MISC_CTL_DISP_EN;
729 		bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MISCX_CTL, cfg);
730 		return 0;
731 	}
732 
733 	if ((lmac->lmac_type == BGX_MODE_SGMII) && lmac->phydev) {
734 		if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_STATUS,
735 				 PCS_MRX_STATUS_AN_CPT, false)) {
736 			dev_err(&bgx->pdev->dev, "BGX AN_CPT not completed\n");
737 			return -1;
738 		}
739 	}
740 
741 	return 0;
742 }
743 
bgx_lmac_xaui_init(struct bgx * bgx,struct lmac * lmac)744 static int bgx_lmac_xaui_init(struct bgx *bgx, struct lmac *lmac)
745 {
746 	u64 cfg;
747 	int lmacid = lmac->lmacid;
748 
749 	/* Reset SPU */
750 	bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET);
751 	if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
752 		dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
753 		return -1;
754 	}
755 
756 	/* Disable LMAC */
757 	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
758 	cfg &= ~CMR_EN;
759 	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
760 
761 	bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);
762 	/* Set interleaved running disparity for RXAUI */
763 	if (lmac->lmac_type == BGX_MODE_RXAUI)
764 		bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL,
765 			       SPU_MISC_CTL_INTLV_RDISP);
766 
767 	/* Clear receive packet disable */
768 	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_MISC_CONTROL);
769 	cfg &= ~SPU_MISC_CTL_RX_DIS;
770 	bgx_reg_write(bgx, lmacid, BGX_SPUX_MISC_CONTROL, cfg);
771 
772 	/* clear all interrupts */
773 	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_INT);
774 	bgx_reg_write(bgx, lmacid, BGX_SMUX_RX_INT, cfg);
775 	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_INT);
776 	bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_INT, cfg);
777 	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
778 	bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
779 
780 	if (lmac->use_training) {
781 		bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LP_CUP, 0x00);
782 		bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_CUP, 0x00);
783 		bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_REP, 0x00);
784 		/* training enable */
785 		bgx_reg_modify(bgx, lmacid,
786 			       BGX_SPUX_BR_PMD_CRTL, SPU_PMD_CRTL_TRAIN_EN);
787 	}
788 
789 	/* Append FCS to each packet */
790 	bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, SMU_TX_APPEND_FCS_D);
791 
792 	/* Disable forward error correction */
793 	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_FEC_CONTROL);
794 	cfg &= ~SPU_FEC_CTL_FEC_EN;
795 	bgx_reg_write(bgx, lmacid, BGX_SPUX_FEC_CONTROL, cfg);
796 
797 	/* Disable autoneg */
798 	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_CONTROL);
799 	cfg = cfg & ~(SPU_AN_CTL_AN_EN | SPU_AN_CTL_XNP_EN);
800 	bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_CONTROL, cfg);
801 
802 	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_ADV);
803 	if (lmac->lmac_type == BGX_MODE_10G_KR)
804 		cfg |= (1 << 23);
805 	else if (lmac->lmac_type == BGX_MODE_40G_KR)
806 		cfg |= (1 << 24);
807 	else
808 		cfg &= ~((1 << 23) | (1 << 24));
809 	cfg = cfg & (~((1ULL << 25) | (1ULL << 22) | (1ULL << 12)));
810 	bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_ADV, cfg);
811 
812 	cfg = bgx_reg_read(bgx, 0, BGX_SPU_DBG_CONTROL);
813 	cfg &= ~SPU_DBG_CTL_AN_ARB_LINK_CHK_EN;
814 	bgx_reg_write(bgx, 0, BGX_SPU_DBG_CONTROL, cfg);
815 
816 	/* Enable lmac */
817 	bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
818 
819 	cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_CONTROL1);
820 	cfg &= ~SPU_CTL_LOW_POWER;
821 	bgx_reg_write(bgx, lmacid, BGX_SPUX_CONTROL1, cfg);
822 
823 	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_CTL);
824 	cfg &= ~SMU_TX_CTL_UNI_EN;
825 	cfg |= SMU_TX_CTL_DIC_EN;
826 	bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_CTL, cfg);
827 
828 	/* Enable receive and transmission of pause frames */
829 	bgx_reg_write(bgx, lmacid, BGX_SMUX_CBFC_CTL, ((0xffffULL << 32) |
830 		      BCK_EN | DRP_EN | TX_EN | RX_EN));
831 	/* Configure pause time and interval */
832 	bgx_reg_write(bgx, lmacid,
833 		      BGX_SMUX_TX_PAUSE_PKT_TIME, DEFAULT_PAUSE_TIME);
834 	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_PAUSE_PKT_INTERVAL);
835 	cfg &= ~0xFFFFull;
836 	bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_PAUSE_PKT_INTERVAL,
837 		      cfg | (DEFAULT_PAUSE_TIME - 0x1000));
838 	bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_PAUSE_ZERO, 0x01);
839 
840 	/* take lmac_count into account */
841 	bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_THRESH, (0x100 - 1));
842 	/* max packet size */
843 	bgx_reg_modify(bgx, lmacid, BGX_SMUX_RX_JABBER, MAX_FRAME_SIZE);
844 
845 	return 0;
846 }
847 
bgx_xaui_check_link(struct lmac * lmac)848 static int bgx_xaui_check_link(struct lmac *lmac)
849 {
850 	struct bgx *bgx = lmac->bgx;
851 	int lmacid = lmac->lmacid;
852 	int lmac_type = lmac->lmac_type;
853 	u64 cfg;
854 
855 	if (lmac->use_training) {
856 		cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
857 		if (!(cfg & (1ull << 13))) {
858 			cfg = (1ull << 13) | (1ull << 14);
859 			bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
860 			cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL);
861 			cfg |= (1ull << 0);
862 			bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL, cfg);
863 			return -1;
864 		}
865 	}
866 
867 	/* wait for PCS to come out of reset */
868 	if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) {
869 		dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n");
870 		return -1;
871 	}
872 
873 	if ((lmac_type == BGX_MODE_10G_KR) || (lmac_type == BGX_MODE_XFI) ||
874 	    (lmac_type == BGX_MODE_40G_KR) || (lmac_type == BGX_MODE_XLAUI)) {
875 		if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BR_STATUS1,
876 				 SPU_BR_STATUS_BLK_LOCK, false)) {
877 			dev_err(&bgx->pdev->dev,
878 				"SPU_BR_STATUS_BLK_LOCK not completed\n");
879 			return -1;
880 		}
881 	} else {
882 		if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BX_STATUS,
883 				 SPU_BX_STATUS_RX_ALIGN, false)) {
884 			dev_err(&bgx->pdev->dev,
885 				"SPU_BX_STATUS_RX_ALIGN not completed\n");
886 			return -1;
887 		}
888 	}
889 
890 	/* Clear rcvflt bit (latching high) and read it back */
891 	if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT)
892 		bgx_reg_modify(bgx, lmacid,
893 			       BGX_SPUX_STATUS2, SPU_STATUS2_RCVFLT);
894 	if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) {
895 		dev_err(&bgx->pdev->dev, "Receive fault, retry training\n");
896 		if (lmac->use_training) {
897 			cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
898 			if (!(cfg & (1ull << 13))) {
899 				cfg = (1ull << 13) | (1ull << 14);
900 				bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);
901 				cfg = bgx_reg_read(bgx, lmacid,
902 						   BGX_SPUX_BR_PMD_CRTL);
903 				cfg |= (1ull << 0);
904 				bgx_reg_write(bgx, lmacid,
905 					      BGX_SPUX_BR_PMD_CRTL, cfg);
906 				return -1;
907 			}
908 		}
909 		return -1;
910 	}
911 
912 	/* Wait for BGX RX to be idle */
913 	if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_RX_IDLE, false)) {
914 		dev_err(&bgx->pdev->dev, "SMU RX not idle\n");
915 		return -1;
916 	}
917 
918 	/* Wait for BGX TX to be idle */
919 	if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_TX_IDLE, false)) {
920 		dev_err(&bgx->pdev->dev, "SMU TX not idle\n");
921 		return -1;
922 	}
923 
924 	/* Check for MAC RX faults */
925 	cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_CTL);
926 	/* 0 - Link is okay, 1 - Local fault, 2 - Remote fault */
927 	cfg &= SMU_RX_CTL_STATUS;
928 	if (!cfg)
929 		return 0;
930 
931 	/* Rx local/remote fault seen.
932 	 * Do lmac reinit to see if condition recovers
933 	 */
934 	bgx_lmac_xaui_init(bgx, lmac);
935 
936 	return -1;
937 }
938 
bgx_poll_for_sgmii_link(struct lmac * lmac)939 static void bgx_poll_for_sgmii_link(struct lmac *lmac)
940 {
941 	u64 pcs_link, an_result;
942 	u8 speed;
943 
944 	pcs_link = bgx_reg_read(lmac->bgx, lmac->lmacid,
945 				BGX_GMP_PCS_MRX_STATUS);
946 
947 	/*Link state bit is sticky, read it again*/
948 	if (!(pcs_link & PCS_MRX_STATUS_LINK))
949 		pcs_link = bgx_reg_read(lmac->bgx, lmac->lmacid,
950 					BGX_GMP_PCS_MRX_STATUS);
951 
952 	if (bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_GMP_PCS_MRX_STATUS,
953 			 PCS_MRX_STATUS_AN_CPT, false)) {
954 		lmac->link_up = false;
955 		lmac->last_speed = SPEED_UNKNOWN;
956 		lmac->last_duplex = DUPLEX_UNKNOWN;
957 		goto next_poll;
958 	}
959 
960 	lmac->link_up = ((pcs_link & PCS_MRX_STATUS_LINK) != 0) ? true : false;
961 	an_result = bgx_reg_read(lmac->bgx, lmac->lmacid,
962 				 BGX_GMP_PCS_ANX_AN_RESULTS);
963 
964 	speed = (an_result >> 3) & 0x3;
965 	lmac->last_duplex = (an_result >> 1) & 0x1;
966 	switch (speed) {
967 	case 0:
968 		lmac->last_speed = SPEED_10;
969 		break;
970 	case 1:
971 		lmac->last_speed = SPEED_100;
972 		break;
973 	case 2:
974 		lmac->last_speed = SPEED_1000;
975 		break;
976 	default:
977 		lmac->link_up = false;
978 		lmac->last_speed = SPEED_UNKNOWN;
979 		lmac->last_duplex = DUPLEX_UNKNOWN;
980 		break;
981 	}
982 
983 next_poll:
984 
985 	if (lmac->last_link != lmac->link_up) {
986 		if (lmac->link_up)
987 			bgx_sgmii_change_link_state(lmac);
988 		lmac->last_link = lmac->link_up;
989 	}
990 
991 	queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 3);
992 }
993 
bgx_poll_for_link(struct work_struct * work)994 static void bgx_poll_for_link(struct work_struct *work)
995 {
996 	struct lmac *lmac;
997 	u64 spu_link, smu_link;
998 
999 	lmac = container_of(work, struct lmac, dwork.work);
1000 	if (lmac->is_sgmii) {
1001 		bgx_poll_for_sgmii_link(lmac);
1002 		return;
1003 	}
1004 
1005 	/* Receive link is latching low. Force it high and verify it */
1006 	bgx_reg_modify(lmac->bgx, lmac->lmacid,
1007 		       BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK);
1008 	bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1,
1009 		     SPU_STATUS1_RCV_LNK, false);
1010 
1011 	spu_link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1);
1012 	smu_link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SMUX_RX_CTL);
1013 
1014 	if ((spu_link & SPU_STATUS1_RCV_LNK) &&
1015 	    !(smu_link & SMU_RX_CTL_STATUS)) {
1016 		lmac->link_up = true;
1017 		if (lmac->lmac_type == BGX_MODE_XLAUI)
1018 			lmac->last_speed = SPEED_40000;
1019 		else
1020 			lmac->last_speed = SPEED_10000;
1021 		lmac->last_duplex = DUPLEX_FULL;
1022 	} else {
1023 		lmac->link_up = false;
1024 		lmac->last_speed = SPEED_UNKNOWN;
1025 		lmac->last_duplex = DUPLEX_UNKNOWN;
1026 	}
1027 
1028 	if (lmac->last_link != lmac->link_up) {
1029 		if (lmac->link_up) {
1030 			if (bgx_xaui_check_link(lmac)) {
1031 				/* Errors, clear link_up state */
1032 				lmac->link_up = false;
1033 				lmac->last_speed = SPEED_UNKNOWN;
1034 				lmac->last_duplex = DUPLEX_UNKNOWN;
1035 			}
1036 		}
1037 		lmac->last_link = lmac->link_up;
1038 	}
1039 
1040 	queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 2);
1041 }
1042 
phy_interface_mode(u8 lmac_type)1043 static int phy_interface_mode(u8 lmac_type)
1044 {
1045 	if (lmac_type == BGX_MODE_QSGMII)
1046 		return PHY_INTERFACE_MODE_QSGMII;
1047 	if (lmac_type == BGX_MODE_RGMII)
1048 		return PHY_INTERFACE_MODE_RGMII_RXID;
1049 
1050 	return PHY_INTERFACE_MODE_SGMII;
1051 }
1052 
bgx_lmac_enable(struct bgx * bgx,u8 lmacid)1053 static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
1054 {
1055 	struct lmac *lmac;
1056 	u64 cfg;
1057 
1058 	lmac = &bgx->lmac[lmacid];
1059 	lmac->bgx = bgx;
1060 
1061 	if ((lmac->lmac_type == BGX_MODE_SGMII) ||
1062 	    (lmac->lmac_type == BGX_MODE_QSGMII) ||
1063 	    (lmac->lmac_type == BGX_MODE_RGMII)) {
1064 		lmac->is_sgmii = true;
1065 		if (bgx_lmac_sgmii_init(bgx, lmac))
1066 			return -1;
1067 	} else {
1068 		lmac->is_sgmii = false;
1069 		if (bgx_lmac_xaui_init(bgx, lmac))
1070 			return -1;
1071 	}
1072 
1073 	if (lmac->is_sgmii) {
1074 		cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND);
1075 		cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
1076 		bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND, cfg);
1077 		bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_MIN_PKT, 60 - 1);
1078 	} else {
1079 		cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_APPEND);
1080 		cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */
1081 		bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, cfg);
1082 		bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_MIN_PKT, 60 + 4);
1083 	}
1084 
1085 	/* actual number of filters available to exact LMAC */
1086 	lmac->dmacs_count = (RX_DMAC_COUNT / bgx->lmac_count);
1087 	lmac->dmacs = kcalloc(lmac->dmacs_count, sizeof(*lmac->dmacs),
1088 			      GFP_KERNEL);
1089 	if (!lmac->dmacs)
1090 		return -ENOMEM;
1091 
1092 	/* Enable lmac */
1093 	bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
1094 
1095 	/* Restore default cfg, incase low level firmware changed it */
1096 	bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, 0x03);
1097 
1098 	if ((lmac->lmac_type != BGX_MODE_XFI) &&
1099 	    (lmac->lmac_type != BGX_MODE_XLAUI) &&
1100 	    (lmac->lmac_type != BGX_MODE_40G_KR) &&
1101 	    (lmac->lmac_type != BGX_MODE_10G_KR)) {
1102 		if (!lmac->phydev) {
1103 			if (lmac->autoneg) {
1104 				bgx_reg_write(bgx, lmacid,
1105 					      BGX_GMP_PCS_LINKX_TIMER,
1106 					      PCS_LINKX_TIMER_COUNT);
1107 				goto poll;
1108 			} else {
1109 				/* Default to below link speed and duplex */
1110 				lmac->link_up = true;
1111 				lmac->last_speed = SPEED_1000;
1112 				lmac->last_duplex = DUPLEX_FULL;
1113 				bgx_sgmii_change_link_state(lmac);
1114 				return 0;
1115 			}
1116 		}
1117 		lmac->phydev->dev_flags = 0;
1118 
1119 		if (phy_connect_direct(&lmac->netdev, lmac->phydev,
1120 				       bgx_lmac_handler,
1121 				       phy_interface_mode(lmac->lmac_type)))
1122 			return -ENODEV;
1123 
1124 		phy_start(lmac->phydev);
1125 		return 0;
1126 	}
1127 
1128 poll:
1129 	lmac->check_link = alloc_ordered_workqueue("check_link", WQ_MEM_RECLAIM);
1130 	if (!lmac->check_link)
1131 		return -ENOMEM;
1132 	INIT_DELAYED_WORK(&lmac->dwork, bgx_poll_for_link);
1133 	queue_delayed_work(lmac->check_link, &lmac->dwork, 0);
1134 
1135 	return 0;
1136 }
1137 
bgx_lmac_disable(struct bgx * bgx,u8 lmacid)1138 static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)
1139 {
1140 	struct lmac *lmac;
1141 	u64 cfg;
1142 
1143 	lmac = &bgx->lmac[lmacid];
1144 	if (lmac->check_link) {
1145 		/* Destroy work queue */
1146 		cancel_delayed_work_sync(&lmac->dwork);
1147 		destroy_workqueue(lmac->check_link);
1148 	}
1149 
1150 	/* Disable packet reception */
1151 	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
1152 	cfg &= ~CMR_PKT_RX_EN;
1153 	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
1154 
1155 	/* Give chance for Rx/Tx FIFO to get drained */
1156 	bgx_poll_reg(bgx, lmacid, BGX_CMRX_RX_FIFO_LEN, (u64)0x1FFF, true);
1157 	bgx_poll_reg(bgx, lmacid, BGX_CMRX_TX_FIFO_LEN, (u64)0x3FFF, true);
1158 
1159 	/* Disable packet transmission */
1160 	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
1161 	cfg &= ~CMR_PKT_TX_EN;
1162 	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
1163 
1164 	/* Disable serdes lanes */
1165         if (!lmac->is_sgmii)
1166                 bgx_reg_modify(bgx, lmacid,
1167                                BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);
1168         else
1169                 bgx_reg_modify(bgx, lmacid,
1170                                BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_PWR_DN);
1171 
1172 	/* Disable LMAC */
1173 	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
1174 	cfg &= ~CMR_EN;
1175 	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
1176 
1177 	bgx_flush_dmac_cam_filter(bgx, lmacid);
1178 	kfree(lmac->dmacs);
1179 
1180 	if ((lmac->lmac_type != BGX_MODE_XFI) &&
1181 	    (lmac->lmac_type != BGX_MODE_XLAUI) &&
1182 	    (lmac->lmac_type != BGX_MODE_40G_KR) &&
1183 	    (lmac->lmac_type != BGX_MODE_10G_KR) && lmac->phydev)
1184 		phy_disconnect(lmac->phydev);
1185 
1186 	lmac->phydev = NULL;
1187 }
1188 
bgx_init_hw(struct bgx * bgx)1189 static void bgx_init_hw(struct bgx *bgx)
1190 {
1191 	int i;
1192 	struct lmac *lmac;
1193 
1194 	bgx_reg_modify(bgx, 0, BGX_CMR_GLOBAL_CFG, CMR_GLOBAL_CFG_FCS_STRIP);
1195 	if (bgx_reg_read(bgx, 0, BGX_CMR_BIST_STATUS))
1196 		dev_err(&bgx->pdev->dev, "BGX%d BIST failed\n", bgx->bgx_id);
1197 
1198 	/* Set lmac type and lane2serdes mapping */
1199 	for (i = 0; i < bgx->lmac_count; i++) {
1200 		lmac = &bgx->lmac[i];
1201 		bgx_reg_write(bgx, i, BGX_CMRX_CFG,
1202 			      (lmac->lmac_type << 8) | lmac->lane_to_sds);
1203 		bgx->lmac[i].lmacid_bd = lmac_count;
1204 		lmac_count++;
1205 	}
1206 
1207 	bgx_reg_write(bgx, 0, BGX_CMR_TX_LMACS, bgx->lmac_count);
1208 	bgx_reg_write(bgx, 0, BGX_CMR_RX_LMACS, bgx->lmac_count);
1209 
1210 	/* Set the backpressure AND mask */
1211 	for (i = 0; i < bgx->lmac_count; i++)
1212 		bgx_reg_modify(bgx, 0, BGX_CMR_CHAN_MSK_AND,
1213 			       ((1ULL << MAX_BGX_CHANS_PER_LMAC) - 1) <<
1214 			       (i * MAX_BGX_CHANS_PER_LMAC));
1215 
1216 	/* Disable all MAC filtering */
1217 	for (i = 0; i < RX_DMAC_COUNT; i++)
1218 		bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + (i * 8), 0x00);
1219 
1220 	/* Disable MAC steering (NCSI traffic) */
1221 	for (i = 0; i < RX_TRAFFIC_STEER_RULE_COUNT; i++)
1222 		bgx_reg_write(bgx, 0, BGX_CMR_RX_STEERING + (i * 8), 0x00);
1223 }
1224 
bgx_get_lane2sds_cfg(struct bgx * bgx,struct lmac * lmac)1225 static u8 bgx_get_lane2sds_cfg(struct bgx *bgx, struct lmac *lmac)
1226 {
1227 	return (u8)(bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG) & 0xFF);
1228 }
1229 
bgx_print_qlm_mode(struct bgx * bgx,u8 lmacid)1230 static void bgx_print_qlm_mode(struct bgx *bgx, u8 lmacid)
1231 {
1232 	struct device *dev = &bgx->pdev->dev;
1233 	struct lmac *lmac;
1234 	char str[27];
1235 
1236 	if (!bgx->is_dlm && lmacid)
1237 		return;
1238 
1239 	lmac = &bgx->lmac[lmacid];
1240 	if (!bgx->is_dlm)
1241 		sprintf(str, "BGX%d QLM mode", bgx->bgx_id);
1242 	else
1243 		sprintf(str, "BGX%d LMAC%d mode", bgx->bgx_id, lmacid);
1244 
1245 	switch (lmac->lmac_type) {
1246 	case BGX_MODE_SGMII:
1247 		dev_info(dev, "%s: SGMII\n", (char *)str);
1248 		break;
1249 	case BGX_MODE_XAUI:
1250 		dev_info(dev, "%s: XAUI\n", (char *)str);
1251 		break;
1252 	case BGX_MODE_RXAUI:
1253 		dev_info(dev, "%s: RXAUI\n", (char *)str);
1254 		break;
1255 	case BGX_MODE_XFI:
1256 		if (!lmac->use_training)
1257 			dev_info(dev, "%s: XFI\n", (char *)str);
1258 		else
1259 			dev_info(dev, "%s: 10G_KR\n", (char *)str);
1260 		break;
1261 	case BGX_MODE_XLAUI:
1262 		if (!lmac->use_training)
1263 			dev_info(dev, "%s: XLAUI\n", (char *)str);
1264 		else
1265 			dev_info(dev, "%s: 40G_KR4\n", (char *)str);
1266 		break;
1267 	case BGX_MODE_QSGMII:
1268 		dev_info(dev, "%s: QSGMII\n", (char *)str);
1269 		break;
1270 	case BGX_MODE_RGMII:
1271 		dev_info(dev, "%s: RGMII\n", (char *)str);
1272 		break;
1273 	case BGX_MODE_INVALID:
1274 		/* Nothing to do */
1275 		break;
1276 	}
1277 }
1278 
lmac_set_lane2sds(struct bgx * bgx,struct lmac * lmac)1279 static void lmac_set_lane2sds(struct bgx *bgx, struct lmac *lmac)
1280 {
1281 	switch (lmac->lmac_type) {
1282 	case BGX_MODE_SGMII:
1283 	case BGX_MODE_XFI:
1284 		lmac->lane_to_sds = lmac->lmacid;
1285 		break;
1286 	case BGX_MODE_XAUI:
1287 	case BGX_MODE_XLAUI:
1288 	case BGX_MODE_RGMII:
1289 		lmac->lane_to_sds = 0xE4;
1290 		break;
1291 	case BGX_MODE_RXAUI:
1292 		lmac->lane_to_sds = (lmac->lmacid) ? 0xE : 0x4;
1293 		break;
1294 	case BGX_MODE_QSGMII:
1295 		/* There is no way to determine if DLM0/2 is QSGMII or
1296 		 * DLM1/3 is configured to QSGMII as bootloader will
1297 		 * configure all LMACs, so take whatever is configured
1298 		 * by low level firmware.
1299 		 */
1300 		lmac->lane_to_sds = bgx_get_lane2sds_cfg(bgx, lmac);
1301 		break;
1302 	default:
1303 		lmac->lane_to_sds = 0;
1304 		break;
1305 	}
1306 }
1307 
lmac_set_training(struct bgx * bgx,struct lmac * lmac,int lmacid)1308 static void lmac_set_training(struct bgx *bgx, struct lmac *lmac, int lmacid)
1309 {
1310 	if ((lmac->lmac_type != BGX_MODE_10G_KR) &&
1311 	    (lmac->lmac_type != BGX_MODE_40G_KR)) {
1312 		lmac->use_training = false;
1313 		return;
1314 	}
1315 
1316 	lmac->use_training = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL) &
1317 							SPU_PMD_CRTL_TRAIN_EN;
1318 }
1319 
bgx_set_lmac_config(struct bgx * bgx,u8 idx)1320 static void bgx_set_lmac_config(struct bgx *bgx, u8 idx)
1321 {
1322 	struct lmac *lmac;
1323 	u64 cmr_cfg;
1324 	u8 lmac_type;
1325 	u8 lane_to_sds;
1326 
1327 	lmac = &bgx->lmac[idx];
1328 
1329 	if (!bgx->is_dlm || bgx->is_rgx) {
1330 		/* Read LMAC0 type to figure out QLM mode
1331 		 * This is configured by low level firmware
1332 		 */
1333 		cmr_cfg = bgx_reg_read(bgx, 0, BGX_CMRX_CFG);
1334 		lmac->lmac_type = (cmr_cfg >> 8) & 0x07;
1335 		if (bgx->is_rgx)
1336 			lmac->lmac_type = BGX_MODE_RGMII;
1337 		lmac_set_training(bgx, lmac, 0);
1338 		lmac_set_lane2sds(bgx, lmac);
1339 		return;
1340 	}
1341 
1342 	/* For DLMs or SLMs on 80/81/83xx so many lane configurations
1343 	 * are possible and vary across boards. Also Kernel doesn't have
1344 	 * any way to identify board type/info and since firmware does,
1345 	 * just take lmac type and serdes lane config as is.
1346 	 */
1347 	cmr_cfg = bgx_reg_read(bgx, idx, BGX_CMRX_CFG);
1348 	lmac_type = (u8)((cmr_cfg >> 8) & 0x07);
1349 	lane_to_sds = (u8)(cmr_cfg & 0xFF);
1350 	/* Check if config is reset value */
1351 	if ((lmac_type == 0) && (lane_to_sds == 0xE4))
1352 		lmac->lmac_type = BGX_MODE_INVALID;
1353 	else
1354 		lmac->lmac_type = lmac_type;
1355 	lmac->lane_to_sds = lane_to_sds;
1356 	lmac_set_training(bgx, lmac, lmac->lmacid);
1357 }
1358 
bgx_get_qlm_mode(struct bgx * bgx)1359 static void bgx_get_qlm_mode(struct bgx *bgx)
1360 {
1361 	struct lmac *lmac;
1362 	u8  idx;
1363 
1364 	/* Init all LMAC's type to invalid */
1365 	for (idx = 0; idx < bgx->max_lmac; idx++) {
1366 		lmac = &bgx->lmac[idx];
1367 		lmac->lmacid = idx;
1368 		lmac->lmac_type = BGX_MODE_INVALID;
1369 		lmac->use_training = false;
1370 	}
1371 
1372 	/* It is assumed that low level firmware sets this value */
1373 	bgx->lmac_count = bgx_reg_read(bgx, 0, BGX_CMR_RX_LMACS) & 0x7;
1374 	if (bgx->lmac_count > bgx->max_lmac)
1375 		bgx->lmac_count = bgx->max_lmac;
1376 
1377 	for (idx = 0; idx < bgx->lmac_count; idx++) {
1378 		bgx_set_lmac_config(bgx, idx);
1379 		bgx_print_qlm_mode(bgx, idx);
1380 	}
1381 }
1382 
1383 #ifdef CONFIG_ACPI
1384 
acpi_get_mac_address(struct device * dev,struct acpi_device * adev,u8 * dst)1385 static int acpi_get_mac_address(struct device *dev, struct acpi_device *adev,
1386 				u8 *dst)
1387 {
1388 	u8 mac[ETH_ALEN];
1389 	int ret;
1390 
1391 	ret = fwnode_get_mac_address(acpi_fwnode_handle(adev), mac);
1392 	if (ret) {
1393 		dev_err(dev, "MAC address invalid: %pM\n", mac);
1394 		return -EINVAL;
1395 	}
1396 
1397 	dev_info(dev, "MAC address set to: %pM\n", mac);
1398 
1399 	ether_addr_copy(dst, mac);
1400 	return 0;
1401 }
1402 
1403 /* Currently only sets the MAC address. */
bgx_acpi_register_phy(acpi_handle handle,u32 lvl,void * context,void ** rv)1404 static acpi_status bgx_acpi_register_phy(acpi_handle handle,
1405 					 u32 lvl, void *context, void **rv)
1406 {
1407 	struct bgx *bgx = context;
1408 	struct device *dev = &bgx->pdev->dev;
1409 	struct acpi_device *adev;
1410 
1411 	adev = acpi_fetch_acpi_dev(handle);
1412 	if (!adev)
1413 		goto out;
1414 
1415 	acpi_get_mac_address(dev, adev, bgx->lmac[bgx->acpi_lmac_idx].mac);
1416 
1417 	SET_NETDEV_DEV(&bgx->lmac[bgx->acpi_lmac_idx].netdev, dev);
1418 
1419 	bgx->lmac[bgx->acpi_lmac_idx].lmacid = bgx->acpi_lmac_idx;
1420 	bgx->acpi_lmac_idx++; /* move to next LMAC */
1421 out:
1422 	return AE_OK;
1423 }
1424 
bgx_acpi_match_id(acpi_handle handle,u32 lvl,void * context,void ** ret_val)1425 static acpi_status bgx_acpi_match_id(acpi_handle handle, u32 lvl,
1426 				     void *context, void **ret_val)
1427 {
1428 	struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
1429 	struct bgx *bgx = context;
1430 	char bgx_sel[5];
1431 
1432 	snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id);
1433 	if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &string))) {
1434 		pr_warn("Invalid link device\n");
1435 		return AE_OK;
1436 	}
1437 
1438 	if (strncmp(string.pointer, bgx_sel, 4)) {
1439 		kfree(string.pointer);
1440 		return AE_OK;
1441 	}
1442 
1443 	acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
1444 			    bgx_acpi_register_phy, NULL, bgx, NULL);
1445 
1446 	kfree(string.pointer);
1447 	return AE_CTRL_TERMINATE;
1448 }
1449 
bgx_init_acpi_phy(struct bgx * bgx)1450 static int bgx_init_acpi_phy(struct bgx *bgx)
1451 {
1452 	acpi_get_devices(NULL, bgx_acpi_match_id, bgx, (void **)NULL);
1453 	return 0;
1454 }
1455 
1456 #else
1457 
bgx_init_acpi_phy(struct bgx * bgx)1458 static int bgx_init_acpi_phy(struct bgx *bgx)
1459 {
1460 	return -ENODEV;
1461 }
1462 
1463 #endif /* CONFIG_ACPI */
1464 
1465 #if IS_ENABLED(CONFIG_OF_MDIO)
1466 
bgx_init_of_phy(struct bgx * bgx)1467 static int bgx_init_of_phy(struct bgx *bgx)
1468 {
1469 	struct fwnode_handle *fwn;
1470 	struct device_node *node = NULL;
1471 	u8 lmac = 0;
1472 
1473 	device_for_each_child_node(&bgx->pdev->dev, fwn) {
1474 		struct phy_device *pd;
1475 		struct device_node *phy_np;
1476 
1477 		/* Should always be an OF node.  But if it is not, we
1478 		 * cannot handle it, so exit the loop.
1479 		 */
1480 		node = to_of_node(fwn);
1481 		if (!node)
1482 			break;
1483 
1484 		of_get_mac_address(node, bgx->lmac[lmac].mac);
1485 
1486 		SET_NETDEV_DEV(&bgx->lmac[lmac].netdev, &bgx->pdev->dev);
1487 		bgx->lmac[lmac].lmacid = lmac;
1488 
1489 		phy_np = of_parse_phandle(node, "phy-handle", 0);
1490 		/* If there is no phy or defective firmware presents
1491 		 * this cortina phy, for which there is no driver
1492 		 * support, ignore it.
1493 		 */
1494 		if (phy_np &&
1495 		    !of_device_is_compatible(phy_np, "cortina,cs4223-slice")) {
1496 			/* Wait until the phy drivers are available */
1497 			pd = of_phy_find_device(phy_np);
1498 			if (!pd)
1499 				goto defer;
1500 			bgx->lmac[lmac].phydev = pd;
1501 		}
1502 
1503 		lmac++;
1504 		if (lmac == bgx->max_lmac) {
1505 			of_node_put(node);
1506 			break;
1507 		}
1508 	}
1509 	return 0;
1510 
1511 defer:
1512 	/* We are bailing out, try not to leak device reference counts
1513 	 * for phy devices we may have already found.
1514 	 */
1515 	while (lmac) {
1516 		if (bgx->lmac[lmac].phydev) {
1517 			put_device(&bgx->lmac[lmac].phydev->mdio.dev);
1518 			bgx->lmac[lmac].phydev = NULL;
1519 		}
1520 		lmac--;
1521 	}
1522 	of_node_put(node);
1523 	return -EPROBE_DEFER;
1524 }
1525 
1526 #else
1527 
bgx_init_of_phy(struct bgx * bgx)1528 static int bgx_init_of_phy(struct bgx *bgx)
1529 {
1530 	return -ENODEV;
1531 }
1532 
1533 #endif /* CONFIG_OF_MDIO */
1534 
bgx_init_phy(struct bgx * bgx)1535 static int bgx_init_phy(struct bgx *bgx)
1536 {
1537 	if (!acpi_disabled)
1538 		return bgx_init_acpi_phy(bgx);
1539 
1540 	return bgx_init_of_phy(bgx);
1541 }
1542 
bgx_intr_handler(int irq,void * data)1543 static irqreturn_t bgx_intr_handler(int irq, void *data)
1544 {
1545 	struct bgx *bgx = (struct bgx *)data;
1546 	u64 status, val;
1547 	int lmac;
1548 
1549 	for (lmac = 0; lmac < bgx->lmac_count; lmac++) {
1550 		status = bgx_reg_read(bgx, lmac, BGX_GMP_GMI_TXX_INT);
1551 		if (status & GMI_TXX_INT_UNDFLW) {
1552 			pci_err(bgx->pdev, "BGX%d lmac%d UNDFLW\n",
1553 				bgx->bgx_id, lmac);
1554 			val = bgx_reg_read(bgx, lmac, BGX_CMRX_CFG);
1555 			val &= ~CMR_EN;
1556 			bgx_reg_write(bgx, lmac, BGX_CMRX_CFG, val);
1557 			val |= CMR_EN;
1558 			bgx_reg_write(bgx, lmac, BGX_CMRX_CFG, val);
1559 		}
1560 		/* clear interrupts */
1561 		bgx_reg_write(bgx, lmac, BGX_GMP_GMI_TXX_INT, status);
1562 	}
1563 
1564 	return IRQ_HANDLED;
1565 }
1566 
bgx_register_intr(struct pci_dev * pdev)1567 static void bgx_register_intr(struct pci_dev *pdev)
1568 {
1569 	struct bgx *bgx = pci_get_drvdata(pdev);
1570 	int ret;
1571 
1572 	ret = pci_alloc_irq_vectors(pdev, BGX_LMAC_VEC_OFFSET,
1573 				    BGX_LMAC_VEC_OFFSET, PCI_IRQ_ALL_TYPES);
1574 	if (ret < 0) {
1575 		pci_err(pdev, "Req for #%d msix vectors failed\n",
1576 			BGX_LMAC_VEC_OFFSET);
1577 		return;
1578 	}
1579 	ret = pci_request_irq(pdev, GMPX_GMI_TX_INT, bgx_intr_handler, NULL,
1580 			      bgx, "BGX%d", bgx->bgx_id);
1581 	if (ret)
1582 		pci_free_irq(pdev, GMPX_GMI_TX_INT, bgx);
1583 }
1584 
bgx_probe(struct pci_dev * pdev,const struct pci_device_id * ent)1585 static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1586 {
1587 	int err;
1588 	struct device *dev = &pdev->dev;
1589 	struct bgx *bgx = NULL;
1590 	u8 lmac;
1591 	u16 sdevid;
1592 
1593 	bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL);
1594 	if (!bgx)
1595 		return -ENOMEM;
1596 	bgx->pdev = pdev;
1597 
1598 	pci_set_drvdata(pdev, bgx);
1599 
1600 	err = pcim_enable_device(pdev);
1601 	if (err) {
1602 		pci_set_drvdata(pdev, NULL);
1603 		return dev_err_probe(dev, err, "Failed to enable PCI device\n");
1604 	}
1605 
1606 	err = pci_request_regions(pdev, DRV_NAME);
1607 	if (err) {
1608 		dev_err(dev, "PCI request regions failed 0x%x\n", err);
1609 		goto err_disable_device;
1610 	}
1611 
1612 	/* MAP configuration registers */
1613 	bgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
1614 	if (!bgx->reg_base) {
1615 		dev_err(dev, "BGX: Cannot map CSR memory space, aborting\n");
1616 		err = -ENOMEM;
1617 		goto err_release_regions;
1618 	}
1619 
1620 	set_max_bgx_per_node(pdev);
1621 
1622 	pci_read_config_word(pdev, PCI_DEVICE_ID, &sdevid);
1623 	if (sdevid != PCI_DEVICE_ID_THUNDER_RGX) {
1624 		bgx->bgx_id = (pci_resource_start(pdev,
1625 			PCI_CFG_REG_BAR_NUM) >> 24) & BGX_ID_MASK;
1626 		bgx->bgx_id += nic_get_node_id(pdev) * max_bgx_per_node;
1627 		bgx->max_lmac = MAX_LMAC_PER_BGX;
1628 		bgx_vnic[bgx->bgx_id] = bgx;
1629 	} else {
1630 		bgx->is_rgx = true;
1631 		bgx->max_lmac = 1;
1632 		bgx->bgx_id = MAX_BGX_PER_CN81XX - 1;
1633 		bgx_vnic[bgx->bgx_id] = bgx;
1634 		xcv_init_hw();
1635 	}
1636 
1637 	/* On 81xx all are DLMs and on 83xx there are 3 BGX QLMs and one
1638 	 * BGX i.e BGX2 can be split across 2 DLMs.
1639 	 */
1640 	pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &sdevid);
1641 	if ((sdevid == PCI_SUBSYS_DEVID_81XX_BGX) ||
1642 	    ((sdevid == PCI_SUBSYS_DEVID_83XX_BGX) && (bgx->bgx_id == 2)))
1643 		bgx->is_dlm = true;
1644 
1645 	bgx_get_qlm_mode(bgx);
1646 
1647 	err = bgx_init_phy(bgx);
1648 	if (err)
1649 		goto err_enable;
1650 
1651 	bgx_init_hw(bgx);
1652 
1653 	bgx_register_intr(pdev);
1654 
1655 	/* Enable all LMACs */
1656 	for (lmac = 0; lmac < bgx->lmac_count; lmac++) {
1657 		err = bgx_lmac_enable(bgx, lmac);
1658 		if (err) {
1659 			dev_err(dev, "BGX%d failed to enable lmac%d\n",
1660 				bgx->bgx_id, lmac);
1661 			while (lmac)
1662 				bgx_lmac_disable(bgx, --lmac);
1663 			goto err_enable;
1664 		}
1665 	}
1666 
1667 	return 0;
1668 
1669 err_enable:
1670 	bgx_vnic[bgx->bgx_id] = NULL;
1671 	pci_free_irq(pdev, GMPX_GMI_TX_INT, bgx);
1672 err_release_regions:
1673 	pci_release_regions(pdev);
1674 err_disable_device:
1675 	pci_disable_device(pdev);
1676 	pci_set_drvdata(pdev, NULL);
1677 	return err;
1678 }
1679 
bgx_remove(struct pci_dev * pdev)1680 static void bgx_remove(struct pci_dev *pdev)
1681 {
1682 	struct bgx *bgx = pci_get_drvdata(pdev);
1683 	u8 lmac;
1684 
1685 	/* Disable all LMACs */
1686 	for (lmac = 0; lmac < bgx->lmac_count; lmac++)
1687 		bgx_lmac_disable(bgx, lmac);
1688 
1689 	pci_free_irq(pdev, GMPX_GMI_TX_INT, bgx);
1690 
1691 	bgx_vnic[bgx->bgx_id] = NULL;
1692 	pci_release_regions(pdev);
1693 	pci_disable_device(pdev);
1694 	pci_set_drvdata(pdev, NULL);
1695 }
1696 
1697 static struct pci_driver bgx_driver = {
1698 	.name = DRV_NAME,
1699 	.id_table = bgx_id_table,
1700 	.probe = bgx_probe,
1701 	.remove = bgx_remove,
1702 };
1703 
bgx_init_module(void)1704 static int __init bgx_init_module(void)
1705 {
1706 	pr_info("%s, ver %s\n", DRV_NAME, DRV_VERSION);
1707 
1708 	return pci_register_driver(&bgx_driver);
1709 }
1710 
bgx_cleanup_module(void)1711 static void __exit bgx_cleanup_module(void)
1712 {
1713 	pci_unregister_driver(&bgx_driver);
1714 }
1715 
1716 module_init(bgx_init_module);
1717 module_exit(bgx_cleanup_module);
1718