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1/*
2 * Driver for BCM963xx builtin Ethernet mac
3 *
4 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20#include <linux/init.h>
21#include <linux/interrupt.h>
22#include <linux/module.h>
23#include <linux/clk.h>
24#include <linux/etherdevice.h>
25#include <linux/slab.h>
26#include <linux/delay.h>
27#include <linux/ethtool.h>
28#include <linux/crc32.h>
29#include <linux/err.h>
30#include <linux/dma-mapping.h>
31#include <linux/platform_device.h>
32#include <linux/if_vlan.h>
33
34#include <bcm63xx_dev_enet.h>
35#include "bcm63xx_enet.h"
36
37static char bcm_enet_driver_name[] = "bcm63xx_enet";
38static char bcm_enet_driver_version[] = "1.0";
39
40static int copybreak __read_mostly = 128;
41module_param(copybreak, int, 0);
42MODULE_PARM_DESC(copybreak, "Receive copy threshold");
43
44/* io registers memory shared between all devices */
45static void __iomem *bcm_enet_shared_base[3];
46
47/*
48 * io helpers to access mac registers
49 */
50static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
51{
52 return bcm_readl(priv->base + off);
53}
54
55static inline void enet_writel(struct bcm_enet_priv *priv,
56 u32 val, u32 off)
57{
58 bcm_writel(val, priv->base + off);
59}
60
61/*
62 * io helpers to access switch registers
63 */
64static inline u32 enetsw_readl(struct bcm_enet_priv *priv, u32 off)
65{
66 return bcm_readl(priv->base + off);
67}
68
69static inline void enetsw_writel(struct bcm_enet_priv *priv,
70 u32 val, u32 off)
71{
72 bcm_writel(val, priv->base + off);
73}
74
75static inline u16 enetsw_readw(struct bcm_enet_priv *priv, u32 off)
76{
77 return bcm_readw(priv->base + off);
78}
79
80static inline void enetsw_writew(struct bcm_enet_priv *priv,
81 u16 val, u32 off)
82{
83 bcm_writew(val, priv->base + off);
84}
85
86static inline u8 enetsw_readb(struct bcm_enet_priv *priv, u32 off)
87{
88 return bcm_readb(priv->base + off);
89}
90
91static inline void enetsw_writeb(struct bcm_enet_priv *priv,
92 u8 val, u32 off)
93{
94 bcm_writeb(val, priv->base + off);
95}
96
97
98/* io helpers to access shared registers */
99static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
100{
101 return bcm_readl(bcm_enet_shared_base[0] + off);
102}
103
104static inline void enet_dma_writel(struct bcm_enet_priv *priv,
105 u32 val, u32 off)
106{
107 bcm_writel(val, bcm_enet_shared_base[0] + off);
108}
109
110static inline u32 enet_dmac_readl(struct bcm_enet_priv *priv, u32 off, int chan)
111{
112 return bcm_readl(bcm_enet_shared_base[1] +
113 bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
114}
115
116static inline void enet_dmac_writel(struct bcm_enet_priv *priv,
117 u32 val, u32 off, int chan)
118{
119 bcm_writel(val, bcm_enet_shared_base[1] +
120 bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
121}
122
123static inline u32 enet_dmas_readl(struct bcm_enet_priv *priv, u32 off, int chan)
124{
125 return bcm_readl(bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
126}
127
128static inline void enet_dmas_writel(struct bcm_enet_priv *priv,
129 u32 val, u32 off, int chan)
130{
131 bcm_writel(val, bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
132}
133
134/*
135 * write given data into mii register and wait for transfer to end
136 * with timeout (average measured transfer time is 25us)
137 */
138static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
139{
140 int limit;
141
142 /* make sure mii interrupt status is cleared */
143 enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
144
145 enet_writel(priv, data, ENET_MIIDATA_REG);
146 wmb();
147
148 /* busy wait on mii interrupt bit, with timeout */
149 limit = 1000;
150 do {
151 if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
152 break;
153 udelay(1);
154 } while (limit-- > 0);
155
156 return (limit < 0) ? 1 : 0;
157}
158
159/*
160 * MII internal read callback
161 */
162static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
163 int regnum)
164{
165 u32 tmp, val;
166
167 tmp = regnum << ENET_MIIDATA_REG_SHIFT;
168 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
169 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
170 tmp |= ENET_MIIDATA_OP_READ_MASK;
171
172 if (do_mdio_op(priv, tmp))
173 return -1;
174
175 val = enet_readl(priv, ENET_MIIDATA_REG);
176 val &= 0xffff;
177 return val;
178}
179
180/*
181 * MII internal write callback
182 */
183static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
184 int regnum, u16 value)
185{
186 u32 tmp;
187
188 tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
189 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
190 tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
191 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
192 tmp |= ENET_MIIDATA_OP_WRITE_MASK;
193
194 (void)do_mdio_op(priv, tmp);
195 return 0;
196}
197
198/*
199 * MII read callback from phylib
200 */
201static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
202 int regnum)
203{
204 return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
205}
206
207/*
208 * MII write callback from phylib
209 */
210static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
211 int regnum, u16 value)
212{
213 return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
214}
215
216/*
217 * MII read callback from mii core
218 */
219static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
220 int regnum)
221{
222 return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
223}
224
225/*
226 * MII write callback from mii core
227 */
228static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
229 int regnum, int value)
230{
231 bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
232}
233
234/*
235 * refill rx queue
236 */
237static int bcm_enet_refill_rx(struct net_device *dev)
238{
239 struct bcm_enet_priv *priv;
240
241 priv = netdev_priv(dev);
242
243 while (priv->rx_desc_count < priv->rx_ring_size) {
244 struct bcm_enet_desc *desc;
245 struct sk_buff *skb;
246 dma_addr_t p;
247 int desc_idx;
248 u32 len_stat;
249
250 desc_idx = priv->rx_dirty_desc;
251 desc = &priv->rx_desc_cpu[desc_idx];
252
253 if (!priv->rx_skb[desc_idx]) {
254 skb = netdev_alloc_skb(dev, priv->rx_skb_size);
255 if (!skb)
256 break;
257 priv->rx_skb[desc_idx] = skb;
258 p = dma_map_single(&priv->pdev->dev, skb->data,
259 priv->rx_skb_size,
260 DMA_FROM_DEVICE);
261 desc->address = p;
262 }
263
264 len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
265 len_stat |= DMADESC_OWNER_MASK;
266 if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
267 len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
268 priv->rx_dirty_desc = 0;
269 } else {
270 priv->rx_dirty_desc++;
271 }
272 wmb();
273 desc->len_stat = len_stat;
274
275 priv->rx_desc_count++;
276
277 /* tell dma engine we allocated one buffer */
278 if (priv->dma_has_sram)
279 enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
280 else
281 enet_dmac_writel(priv, 1, ENETDMAC_BUFALLOC, priv->rx_chan);
282 }
283
284 /* If rx ring is still empty, set a timer to try allocating
285 * again at a later time. */
286 if (priv->rx_desc_count == 0 && netif_running(dev)) {
287 dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
288 priv->rx_timeout.expires = jiffies + HZ;
289 add_timer(&priv->rx_timeout);
290 }
291
292 return 0;
293}
294
295/*
296 * timer callback to defer refill rx queue in case we're OOM
297 */
298static void bcm_enet_refill_rx_timer(unsigned long data)
299{
300 struct net_device *dev;
301 struct bcm_enet_priv *priv;
302
303 dev = (struct net_device *)data;
304 priv = netdev_priv(dev);
305
306 spin_lock(&priv->rx_lock);
307 bcm_enet_refill_rx((struct net_device *)data);
308 spin_unlock(&priv->rx_lock);
309}
310
311/*
312 * extract packet from rx queue
313 */
314static int bcm_enet_receive_queue(struct net_device *dev, int budget)
315{
316 struct bcm_enet_priv *priv;
317 struct device *kdev;
318 int processed;
319
320 priv = netdev_priv(dev);
321 kdev = &priv->pdev->dev;
322 processed = 0;
323
324 /* don't scan ring further than number of refilled
325 * descriptor */
326 if (budget > priv->rx_desc_count)
327 budget = priv->rx_desc_count;
328
329 do {
330 struct bcm_enet_desc *desc;
331 struct sk_buff *skb;
332 int desc_idx;
333 u32 len_stat;
334 unsigned int len;
335
336 desc_idx = priv->rx_curr_desc;
337 desc = &priv->rx_desc_cpu[desc_idx];
338
339 /* make sure we actually read the descriptor status at
340 * each loop */
341 rmb();
342
343 len_stat = desc->len_stat;
344
345 /* break if dma ownership belongs to hw */
346 if (len_stat & DMADESC_OWNER_MASK)
347 break;
348
349 processed++;
350 priv->rx_curr_desc++;
351 if (priv->rx_curr_desc == priv->rx_ring_size)
352 priv->rx_curr_desc = 0;
353 priv->rx_desc_count--;
354
355 /* if the packet does not have start of packet _and_
356 * end of packet flag set, then just recycle it */
357 if ((len_stat & (DMADESC_ESOP_MASK >> priv->dma_desc_shift)) !=
358 (DMADESC_ESOP_MASK >> priv->dma_desc_shift)) {
359 dev->stats.rx_dropped++;
360 continue;
361 }
362
363 /* recycle packet if it's marked as bad */
364 if (!priv->enet_is_sw &&
365 unlikely(len_stat & DMADESC_ERR_MASK)) {
366 dev->stats.rx_errors++;
367
368 if (len_stat & DMADESC_OVSIZE_MASK)
369 dev->stats.rx_length_errors++;
370 if (len_stat & DMADESC_CRC_MASK)
371 dev->stats.rx_crc_errors++;
372 if (len_stat & DMADESC_UNDER_MASK)
373 dev->stats.rx_frame_errors++;
374 if (len_stat & DMADESC_OV_MASK)
375 dev->stats.rx_fifo_errors++;
376 continue;
377 }
378
379 /* valid packet */
380 skb = priv->rx_skb[desc_idx];
381 len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
382 /* don't include FCS */
383 len -= 4;
384
385 if (len < copybreak) {
386 struct sk_buff *nskb;
387
388 nskb = napi_alloc_skb(&priv->napi, len);
389 if (!nskb) {
390 /* forget packet, just rearm desc */
391 dev->stats.rx_dropped++;
392 continue;
393 }
394
395 dma_sync_single_for_cpu(kdev, desc->address,
396 len, DMA_FROM_DEVICE);
397 memcpy(nskb->data, skb->data, len);
398 dma_sync_single_for_device(kdev, desc->address,
399 len, DMA_FROM_DEVICE);
400 skb = nskb;
401 } else {
402 dma_unmap_single(&priv->pdev->dev, desc->address,
403 priv->rx_skb_size, DMA_FROM_DEVICE);
404 priv->rx_skb[desc_idx] = NULL;
405 }
406
407 skb_put(skb, len);
408 skb->protocol = eth_type_trans(skb, dev);
409 dev->stats.rx_packets++;
410 dev->stats.rx_bytes += len;
411 netif_receive_skb(skb);
412
413 } while (--budget > 0);
414
415 if (processed || !priv->rx_desc_count) {
416 bcm_enet_refill_rx(dev);
417
418 /* kick rx dma */
419 enet_dmac_writel(priv, priv->dma_chan_en_mask,
420 ENETDMAC_CHANCFG, priv->rx_chan);
421 }
422
423 return processed;
424}
425
426
427/*
428 * try to or force reclaim of transmitted buffers
429 */
430static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
431{
432 struct bcm_enet_priv *priv;
433 int released;
434
435 priv = netdev_priv(dev);
436 released = 0;
437
438 while (priv->tx_desc_count < priv->tx_ring_size) {
439 struct bcm_enet_desc *desc;
440 struct sk_buff *skb;
441
442 /* We run in a bh and fight against start_xmit, which
443 * is called with bh disabled */
444 spin_lock(&priv->tx_lock);
445
446 desc = &priv->tx_desc_cpu[priv->tx_dirty_desc];
447
448 if (!force && (desc->len_stat & DMADESC_OWNER_MASK)) {
449 spin_unlock(&priv->tx_lock);
450 break;
451 }
452
453 /* ensure other field of the descriptor were not read
454 * before we checked ownership */
455 rmb();
456
457 skb = priv->tx_skb[priv->tx_dirty_desc];
458 priv->tx_skb[priv->tx_dirty_desc] = NULL;
459 dma_unmap_single(&priv->pdev->dev, desc->address, skb->len,
460 DMA_TO_DEVICE);
461
462 priv->tx_dirty_desc++;
463 if (priv->tx_dirty_desc == priv->tx_ring_size)
464 priv->tx_dirty_desc = 0;
465 priv->tx_desc_count++;
466
467 spin_unlock(&priv->tx_lock);
468
469 if (desc->len_stat & DMADESC_UNDER_MASK)
470 dev->stats.tx_errors++;
471
472 dev_kfree_skb(skb);
473 released++;
474 }
475
476 if (netif_queue_stopped(dev) && released)
477 netif_wake_queue(dev);
478
479 return released;
480}
481
482/*
483 * poll func, called by network core
484 */
485static int bcm_enet_poll(struct napi_struct *napi, int budget)
486{
487 struct bcm_enet_priv *priv;
488 struct net_device *dev;
489 int rx_work_done;
490
491 priv = container_of(napi, struct bcm_enet_priv, napi);
492 dev = priv->net_dev;
493
494 /* ack interrupts */
495 enet_dmac_writel(priv, priv->dma_chan_int_mask,
496 ENETDMAC_IR, priv->rx_chan);
497 enet_dmac_writel(priv, priv->dma_chan_int_mask,
498 ENETDMAC_IR, priv->tx_chan);
499
500 /* reclaim sent skb */
501 bcm_enet_tx_reclaim(dev, 0);
502
503 spin_lock(&priv->rx_lock);
504 rx_work_done = bcm_enet_receive_queue(dev, budget);
505 spin_unlock(&priv->rx_lock);
506
507 if (rx_work_done >= budget) {
508 /* rx queue is not yet empty/clean */
509 return rx_work_done;
510 }
511
512 /* no more packet in rx/tx queue, remove device from poll
513 * queue */
514 napi_complete(napi);
515
516 /* restore rx/tx interrupt */
517 enet_dmac_writel(priv, priv->dma_chan_int_mask,
518 ENETDMAC_IRMASK, priv->rx_chan);
519 enet_dmac_writel(priv, priv->dma_chan_int_mask,
520 ENETDMAC_IRMASK, priv->tx_chan);
521
522 return rx_work_done;
523}
524
525/*
526 * mac interrupt handler
527 */
528static irqreturn_t bcm_enet_isr_mac(int irq, void *dev_id)
529{
530 struct net_device *dev;
531 struct bcm_enet_priv *priv;
532 u32 stat;
533
534 dev = dev_id;
535 priv = netdev_priv(dev);
536
537 stat = enet_readl(priv, ENET_IR_REG);
538 if (!(stat & ENET_IR_MIB))
539 return IRQ_NONE;
540
541 /* clear & mask interrupt */
542 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
543 enet_writel(priv, 0, ENET_IRMASK_REG);
544
545 /* read mib registers in workqueue */
546 schedule_work(&priv->mib_update_task);
547
548 return IRQ_HANDLED;
549}
550
551/*
552 * rx/tx dma interrupt handler
553 */
554static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
555{
556 struct net_device *dev;
557 struct bcm_enet_priv *priv;
558
559 dev = dev_id;
560 priv = netdev_priv(dev);
561
562 /* mask rx/tx interrupts */
563 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
564 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
565
566 napi_schedule(&priv->napi);
567
568 return IRQ_HANDLED;
569}
570
571/*
572 * tx request callback
573 */
574static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
575{
576 struct bcm_enet_priv *priv;
577 struct bcm_enet_desc *desc;
578 u32 len_stat;
579 int ret;
580
581 priv = netdev_priv(dev);
582
583 /* lock against tx reclaim */
584 spin_lock(&priv->tx_lock);
585
586 /* make sure the tx hw queue is not full, should not happen
587 * since we stop queue before it's the case */
588 if (unlikely(!priv->tx_desc_count)) {
589 netif_stop_queue(dev);
590 dev_err(&priv->pdev->dev, "xmit called with no tx desc "
591 "available?\n");
592 ret = NETDEV_TX_BUSY;
593 goto out_unlock;
594 }
595
596 /* pad small packets sent on a switch device */
597 if (priv->enet_is_sw && skb->len < 64) {
598 int needed = 64 - skb->len;
599 char *data;
600
601 if (unlikely(skb_tailroom(skb) < needed)) {
602 struct sk_buff *nskb;
603
604 nskb = skb_copy_expand(skb, 0, needed, GFP_ATOMIC);
605 if (!nskb) {
606 ret = NETDEV_TX_BUSY;
607 goto out_unlock;
608 }
609 dev_kfree_skb(skb);
610 skb = nskb;
611 }
612 data = skb_put(skb, needed);
613 memset(data, 0, needed);
614 }
615
616 /* point to the next available desc */
617 desc = &priv->tx_desc_cpu[priv->tx_curr_desc];
618 priv->tx_skb[priv->tx_curr_desc] = skb;
619
620 /* fill descriptor */
621 desc->address = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
622 DMA_TO_DEVICE);
623
624 len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
625 len_stat |= (DMADESC_ESOP_MASK >> priv->dma_desc_shift) |
626 DMADESC_APPEND_CRC |
627 DMADESC_OWNER_MASK;
628
629 priv->tx_curr_desc++;
630 if (priv->tx_curr_desc == priv->tx_ring_size) {
631 priv->tx_curr_desc = 0;
632 len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
633 }
634 priv->tx_desc_count--;
635
636 /* dma might be already polling, make sure we update desc
637 * fields in correct order */
638 wmb();
639 desc->len_stat = len_stat;
640 wmb();
641
642 /* kick tx dma */
643 enet_dmac_writel(priv, priv->dma_chan_en_mask,
644 ENETDMAC_CHANCFG, priv->tx_chan);
645
646 /* stop queue if no more desc available */
647 if (!priv->tx_desc_count)
648 netif_stop_queue(dev);
649
650 dev->stats.tx_bytes += skb->len;
651 dev->stats.tx_packets++;
652 ret = NETDEV_TX_OK;
653
654out_unlock:
655 spin_unlock(&priv->tx_lock);
656 return ret;
657}
658
659/*
660 * Change the interface's mac address.
661 */
662static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
663{
664 struct bcm_enet_priv *priv;
665 struct sockaddr *addr = p;
666 u32 val;
667
668 priv = netdev_priv(dev);
669 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
670
671 /* use perfect match register 0 to store my mac address */
672 val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
673 (dev->dev_addr[4] << 8) | dev->dev_addr[5];
674 enet_writel(priv, val, ENET_PML_REG(0));
675
676 val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
677 val |= ENET_PMH_DATAVALID_MASK;
678 enet_writel(priv, val, ENET_PMH_REG(0));
679
680 return 0;
681}
682
683/*
684 * Change rx mode (promiscuous/allmulti) and update multicast list
685 */
686static void bcm_enet_set_multicast_list(struct net_device *dev)
687{
688 struct bcm_enet_priv *priv;
689 struct netdev_hw_addr *ha;
690 u32 val;
691 int i;
692
693 priv = netdev_priv(dev);
694
695 val = enet_readl(priv, ENET_RXCFG_REG);
696
697 if (dev->flags & IFF_PROMISC)
698 val |= ENET_RXCFG_PROMISC_MASK;
699 else
700 val &= ~ENET_RXCFG_PROMISC_MASK;
701
702 /* only 3 perfect match registers left, first one is used for
703 * own mac address */
704 if ((dev->flags & IFF_ALLMULTI) || netdev_mc_count(dev) > 3)
705 val |= ENET_RXCFG_ALLMCAST_MASK;
706 else
707 val &= ~ENET_RXCFG_ALLMCAST_MASK;
708
709 /* no need to set perfect match registers if we catch all
710 * multicast */
711 if (val & ENET_RXCFG_ALLMCAST_MASK) {
712 enet_writel(priv, val, ENET_RXCFG_REG);
713 return;
714 }
715
716 i = 0;
717 netdev_for_each_mc_addr(ha, dev) {
718 u8 *dmi_addr;
719 u32 tmp;
720
721 if (i == 3)
722 break;
723 /* update perfect match registers */
724 dmi_addr = ha->addr;
725 tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
726 (dmi_addr[4] << 8) | dmi_addr[5];
727 enet_writel(priv, tmp, ENET_PML_REG(i + 1));
728
729 tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
730 tmp |= ENET_PMH_DATAVALID_MASK;
731 enet_writel(priv, tmp, ENET_PMH_REG(i++ + 1));
732 }
733
734 for (; i < 3; i++) {
735 enet_writel(priv, 0, ENET_PML_REG(i + 1));
736 enet_writel(priv, 0, ENET_PMH_REG(i + 1));
737 }
738
739 enet_writel(priv, val, ENET_RXCFG_REG);
740}
741
742/*
743 * set mac duplex parameters
744 */
745static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
746{
747 u32 val;
748
749 val = enet_readl(priv, ENET_TXCTL_REG);
750 if (fullduplex)
751 val |= ENET_TXCTL_FD_MASK;
752 else
753 val &= ~ENET_TXCTL_FD_MASK;
754 enet_writel(priv, val, ENET_TXCTL_REG);
755}
756
757/*
758 * set mac flow control parameters
759 */
760static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
761{
762 u32 val;
763
764 /* rx flow control (pause frame handling) */
765 val = enet_readl(priv, ENET_RXCFG_REG);
766 if (rx_en)
767 val |= ENET_RXCFG_ENFLOW_MASK;
768 else
769 val &= ~ENET_RXCFG_ENFLOW_MASK;
770 enet_writel(priv, val, ENET_RXCFG_REG);
771
772 if (!priv->dma_has_sram)
773 return;
774
775 /* tx flow control (pause frame generation) */
776 val = enet_dma_readl(priv, ENETDMA_CFG_REG);
777 if (tx_en)
778 val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
779 else
780 val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
781 enet_dma_writel(priv, val, ENETDMA_CFG_REG);
782}
783
784/*
785 * link changed callback (from phylib)
786 */
787static void bcm_enet_adjust_phy_link(struct net_device *dev)
788{
789 struct bcm_enet_priv *priv;
790 struct phy_device *phydev;
791 int status_changed;
792
793 priv = netdev_priv(dev);
794 phydev = dev->phydev;
795 status_changed = 0;
796
797 if (priv->old_link != phydev->link) {
798 status_changed = 1;
799 priv->old_link = phydev->link;
800 }
801
802 /* reflect duplex change in mac configuration */
803 if (phydev->link && phydev->duplex != priv->old_duplex) {
804 bcm_enet_set_duplex(priv,
805 (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
806 status_changed = 1;
807 priv->old_duplex = phydev->duplex;
808 }
809
810 /* enable flow control if remote advertise it (trust phylib to
811 * check that duplex is full */
812 if (phydev->link && phydev->pause != priv->old_pause) {
813 int rx_pause_en, tx_pause_en;
814
815 if (phydev->pause) {
816 /* pause was advertised by lpa and us */
817 rx_pause_en = 1;
818 tx_pause_en = 1;
819 } else if (!priv->pause_auto) {
820 /* pause setting overrided by user */
821 rx_pause_en = priv->pause_rx;
822 tx_pause_en = priv->pause_tx;
823 } else {
824 rx_pause_en = 0;
825 tx_pause_en = 0;
826 }
827
828 bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
829 status_changed = 1;
830 priv->old_pause = phydev->pause;
831 }
832
833 if (status_changed) {
834 pr_info("%s: link %s", dev->name, phydev->link ?
835 "UP" : "DOWN");
836 if (phydev->link)
837 pr_cont(" - %d/%s - flow control %s", phydev->speed,
838 DUPLEX_FULL == phydev->duplex ? "full" : "half",
839 phydev->pause == 1 ? "rx&tx" : "off");
840
841 pr_cont("\n");
842 }
843}
844
845/*
846 * link changed callback (if phylib is not used)
847 */
848static void bcm_enet_adjust_link(struct net_device *dev)
849{
850 struct bcm_enet_priv *priv;
851
852 priv = netdev_priv(dev);
853 bcm_enet_set_duplex(priv, priv->force_duplex_full);
854 bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
855 netif_carrier_on(dev);
856
857 pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
858 dev->name,
859 priv->force_speed_100 ? 100 : 10,
860 priv->force_duplex_full ? "full" : "half",
861 priv->pause_rx ? "rx" : "off",
862 priv->pause_tx ? "tx" : "off");
863}
864
865/*
866 * open callback, allocate dma rings & buffers and start rx operation
867 */
868static int bcm_enet_open(struct net_device *dev)
869{
870 struct bcm_enet_priv *priv;
871 struct sockaddr addr;
872 struct device *kdev;
873 struct phy_device *phydev;
874 int i, ret;
875 unsigned int size;
876 char phy_id[MII_BUS_ID_SIZE + 3];
877 void *p;
878 u32 val;
879
880 priv = netdev_priv(dev);
881 kdev = &priv->pdev->dev;
882
883 if (priv->has_phy) {
884 /* connect to PHY */
885 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
886 priv->mii_bus->id, priv->phy_id);
887
888 phydev = phy_connect(dev, phy_id, bcm_enet_adjust_phy_link,
889 PHY_INTERFACE_MODE_MII);
890
891 if (IS_ERR(phydev)) {
892 dev_err(kdev, "could not attach to PHY\n");
893 return PTR_ERR(phydev);
894 }
895
896 /* mask with MAC supported features */
897 phydev->supported &= (SUPPORTED_10baseT_Half |
898 SUPPORTED_10baseT_Full |
899 SUPPORTED_100baseT_Half |
900 SUPPORTED_100baseT_Full |
901 SUPPORTED_Autoneg |
902 SUPPORTED_Pause |
903 SUPPORTED_MII);
904 phydev->advertising = phydev->supported;
905
906 if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
907 phydev->advertising |= SUPPORTED_Pause;
908 else
909 phydev->advertising &= ~SUPPORTED_Pause;
910
911 phy_attached_info(phydev);
912
913 priv->old_link = 0;
914 priv->old_duplex = -1;
915 priv->old_pause = -1;
916 } else {
917 phydev = NULL;
918 }
919
920 /* mask all interrupts and request them */
921 enet_writel(priv, 0, ENET_IRMASK_REG);
922 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
923 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
924
925 ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
926 if (ret)
927 goto out_phy_disconnect;
928
929 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, 0,
930 dev->name, dev);
931 if (ret)
932 goto out_freeirq;
933
934 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
935 0, dev->name, dev);
936 if (ret)
937 goto out_freeirq_rx;
938
939 /* initialize perfect match registers */
940 for (i = 0; i < 4; i++) {
941 enet_writel(priv, 0, ENET_PML_REG(i));
942 enet_writel(priv, 0, ENET_PMH_REG(i));
943 }
944
945 /* write device mac address */
946 memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
947 bcm_enet_set_mac_address(dev, &addr);
948
949 /* allocate rx dma ring */
950 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
951 p = dma_zalloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
952 if (!p) {
953 ret = -ENOMEM;
954 goto out_freeirq_tx;
955 }
956
957 priv->rx_desc_alloc_size = size;
958 priv->rx_desc_cpu = p;
959
960 /* allocate tx dma ring */
961 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
962 p = dma_zalloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
963 if (!p) {
964 ret = -ENOMEM;
965 goto out_free_rx_ring;
966 }
967
968 priv->tx_desc_alloc_size = size;
969 priv->tx_desc_cpu = p;
970
971 priv->tx_skb = kcalloc(priv->tx_ring_size, sizeof(struct sk_buff *),
972 GFP_KERNEL);
973 if (!priv->tx_skb) {
974 ret = -ENOMEM;
975 goto out_free_tx_ring;
976 }
977
978 priv->tx_desc_count = priv->tx_ring_size;
979 priv->tx_dirty_desc = 0;
980 priv->tx_curr_desc = 0;
981 spin_lock_init(&priv->tx_lock);
982
983 /* init & fill rx ring with skbs */
984 priv->rx_skb = kcalloc(priv->rx_ring_size, sizeof(struct sk_buff *),
985 GFP_KERNEL);
986 if (!priv->rx_skb) {
987 ret = -ENOMEM;
988 goto out_free_tx_skb;
989 }
990
991 priv->rx_desc_count = 0;
992 priv->rx_dirty_desc = 0;
993 priv->rx_curr_desc = 0;
994
995 /* initialize flow control buffer allocation */
996 if (priv->dma_has_sram)
997 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
998 ENETDMA_BUFALLOC_REG(priv->rx_chan));
999 else
1000 enet_dmac_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
1001 ENETDMAC_BUFALLOC, priv->rx_chan);
1002
1003 if (bcm_enet_refill_rx(dev)) {
1004 dev_err(kdev, "cannot allocate rx skb queue\n");
1005 ret = -ENOMEM;
1006 goto out;
1007 }
1008
1009 /* write rx & tx ring addresses */
1010 if (priv->dma_has_sram) {
1011 enet_dmas_writel(priv, priv->rx_desc_dma,
1012 ENETDMAS_RSTART_REG, priv->rx_chan);
1013 enet_dmas_writel(priv, priv->tx_desc_dma,
1014 ENETDMAS_RSTART_REG, priv->tx_chan);
1015 } else {
1016 enet_dmac_writel(priv, priv->rx_desc_dma,
1017 ENETDMAC_RSTART, priv->rx_chan);
1018 enet_dmac_writel(priv, priv->tx_desc_dma,
1019 ENETDMAC_RSTART, priv->tx_chan);
1020 }
1021
1022 /* clear remaining state ram for rx & tx channel */
1023 if (priv->dma_has_sram) {
1024 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
1025 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
1026 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
1027 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
1028 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
1029 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
1030 } else {
1031 enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->rx_chan);
1032 enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->tx_chan);
1033 }
1034
1035 /* set max rx/tx length */
1036 enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
1037 enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
1038
1039 /* set dma maximum burst len */
1040 enet_dmac_writel(priv, priv->dma_maxburst,
1041 ENETDMAC_MAXBURST, priv->rx_chan);
1042 enet_dmac_writel(priv, priv->dma_maxburst,
1043 ENETDMAC_MAXBURST, priv->tx_chan);
1044
1045 /* set correct transmit fifo watermark */
1046 enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
1047
1048 /* set flow control low/high threshold to 1/3 / 2/3 */
1049 if (priv->dma_has_sram) {
1050 val = priv->rx_ring_size / 3;
1051 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
1052 val = (priv->rx_ring_size * 2) / 3;
1053 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
1054 } else {
1055 enet_dmac_writel(priv, 5, ENETDMAC_FC, priv->rx_chan);
1056 enet_dmac_writel(priv, priv->rx_ring_size, ENETDMAC_LEN, priv->rx_chan);
1057 enet_dmac_writel(priv, priv->tx_ring_size, ENETDMAC_LEN, priv->tx_chan);
1058 }
1059
1060 /* all set, enable mac and interrupts, start dma engine and
1061 * kick rx dma channel */
1062 wmb();
1063 val = enet_readl(priv, ENET_CTL_REG);
1064 val |= ENET_CTL_ENABLE_MASK;
1065 enet_writel(priv, val, ENET_CTL_REG);
1066 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
1067 enet_dmac_writel(priv, priv->dma_chan_en_mask,
1068 ENETDMAC_CHANCFG, priv->rx_chan);
1069
1070 /* watch "mib counters about to overflow" interrupt */
1071 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
1072 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1073
1074 /* watch "packet transferred" interrupt in rx and tx */
1075 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1076 ENETDMAC_IR, priv->rx_chan);
1077 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1078 ENETDMAC_IR, priv->tx_chan);
1079
1080 /* make sure we enable napi before rx interrupt */
1081 napi_enable(&priv->napi);
1082
1083 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1084 ENETDMAC_IRMASK, priv->rx_chan);
1085 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1086 ENETDMAC_IRMASK, priv->tx_chan);
1087
1088 if (phydev)
1089 phy_start(phydev);
1090 else
1091 bcm_enet_adjust_link(dev);
1092
1093 netif_start_queue(dev);
1094 return 0;
1095
1096out:
1097 for (i = 0; i < priv->rx_ring_size; i++) {
1098 struct bcm_enet_desc *desc;
1099
1100 if (!priv->rx_skb[i])
1101 continue;
1102
1103 desc = &priv->rx_desc_cpu[i];
1104 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1105 DMA_FROM_DEVICE);
1106 kfree_skb(priv->rx_skb[i]);
1107 }
1108 kfree(priv->rx_skb);
1109
1110out_free_tx_skb:
1111 kfree(priv->tx_skb);
1112
1113out_free_tx_ring:
1114 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1115 priv->tx_desc_cpu, priv->tx_desc_dma);
1116
1117out_free_rx_ring:
1118 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1119 priv->rx_desc_cpu, priv->rx_desc_dma);
1120
1121out_freeirq_tx:
1122 free_irq(priv->irq_tx, dev);
1123
1124out_freeirq_rx:
1125 free_irq(priv->irq_rx, dev);
1126
1127out_freeirq:
1128 free_irq(dev->irq, dev);
1129
1130out_phy_disconnect:
1131 if (phydev)
1132 phy_disconnect(phydev);
1133
1134 return ret;
1135}
1136
1137/*
1138 * disable mac
1139 */
1140static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
1141{
1142 int limit;
1143 u32 val;
1144
1145 val = enet_readl(priv, ENET_CTL_REG);
1146 val |= ENET_CTL_DISABLE_MASK;
1147 enet_writel(priv, val, ENET_CTL_REG);
1148
1149 limit = 1000;
1150 do {
1151 u32 val;
1152
1153 val = enet_readl(priv, ENET_CTL_REG);
1154 if (!(val & ENET_CTL_DISABLE_MASK))
1155 break;
1156 udelay(1);
1157 } while (limit--);
1158}
1159
1160/*
1161 * disable dma in given channel
1162 */
1163static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
1164{
1165 int limit;
1166
1167 enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG, chan);
1168
1169 limit = 1000;
1170 do {
1171 u32 val;
1172
1173 val = enet_dmac_readl(priv, ENETDMAC_CHANCFG, chan);
1174 if (!(val & ENETDMAC_CHANCFG_EN_MASK))
1175 break;
1176 udelay(1);
1177 } while (limit--);
1178}
1179
1180/*
1181 * stop callback
1182 */
1183static int bcm_enet_stop(struct net_device *dev)
1184{
1185 struct bcm_enet_priv *priv;
1186 struct device *kdev;
1187 int i;
1188
1189 priv = netdev_priv(dev);
1190 kdev = &priv->pdev->dev;
1191
1192 netif_stop_queue(dev);
1193 napi_disable(&priv->napi);
1194 if (priv->has_phy)
1195 phy_stop(dev->phydev);
1196 del_timer_sync(&priv->rx_timeout);
1197
1198 /* mask all interrupts */
1199 enet_writel(priv, 0, ENET_IRMASK_REG);
1200 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
1201 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
1202
1203 /* make sure no mib update is scheduled */
1204 cancel_work_sync(&priv->mib_update_task);
1205
1206 /* disable dma & mac */
1207 bcm_enet_disable_dma(priv, priv->tx_chan);
1208 bcm_enet_disable_dma(priv, priv->rx_chan);
1209 bcm_enet_disable_mac(priv);
1210
1211 /* force reclaim of all tx buffers */
1212 bcm_enet_tx_reclaim(dev, 1);
1213
1214 /* free the rx skb ring */
1215 for (i = 0; i < priv->rx_ring_size; i++) {
1216 struct bcm_enet_desc *desc;
1217
1218 if (!priv->rx_skb[i])
1219 continue;
1220
1221 desc = &priv->rx_desc_cpu[i];
1222 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1223 DMA_FROM_DEVICE);
1224 kfree_skb(priv->rx_skb[i]);
1225 }
1226
1227 /* free remaining allocated memory */
1228 kfree(priv->rx_skb);
1229 kfree(priv->tx_skb);
1230 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1231 priv->rx_desc_cpu, priv->rx_desc_dma);
1232 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1233 priv->tx_desc_cpu, priv->tx_desc_dma);
1234 free_irq(priv->irq_tx, dev);
1235 free_irq(priv->irq_rx, dev);
1236 free_irq(dev->irq, dev);
1237
1238 /* release phy */
1239 if (priv->has_phy)
1240 phy_disconnect(dev->phydev);
1241
1242 return 0;
1243}
1244
1245/*
1246 * ethtool callbacks
1247 */
1248struct bcm_enet_stats {
1249 char stat_string[ETH_GSTRING_LEN];
1250 int sizeof_stat;
1251 int stat_offset;
1252 int mib_reg;
1253};
1254
1255#define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m), \
1256 offsetof(struct bcm_enet_priv, m)
1257#define DEV_STAT(m) sizeof(((struct net_device_stats *)0)->m), \
1258 offsetof(struct net_device_stats, m)
1259
1260static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
1261 { "rx_packets", DEV_STAT(rx_packets), -1 },
1262 { "tx_packets", DEV_STAT(tx_packets), -1 },
1263 { "rx_bytes", DEV_STAT(rx_bytes), -1 },
1264 { "tx_bytes", DEV_STAT(tx_bytes), -1 },
1265 { "rx_errors", DEV_STAT(rx_errors), -1 },
1266 { "tx_errors", DEV_STAT(tx_errors), -1 },
1267 { "rx_dropped", DEV_STAT(rx_dropped), -1 },
1268 { "tx_dropped", DEV_STAT(tx_dropped), -1 },
1269
1270 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
1271 { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
1272 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
1273 { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
1274 { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
1275 { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
1276 { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
1277 { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
1278 { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
1279 { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
1280 { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
1281 { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
1282 { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
1283 { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
1284 { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
1285 { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
1286 { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
1287 { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
1288 { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
1289 { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
1290 { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
1291
1292 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
1293 { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
1294 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
1295 { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
1296 { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
1297 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
1298 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
1299 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
1300 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
1301 { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
1302 { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
1303 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
1304 { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
1305 { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
1306 { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
1307 { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
1308 { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
1309 { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
1310 { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
1311 { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
1312 { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
1313 { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
1314
1315};
1316
1317#define BCM_ENET_STATS_LEN ARRAY_SIZE(bcm_enet_gstrings_stats)
1318
1319static const u32 unused_mib_regs[] = {
1320 ETH_MIB_TX_ALL_OCTETS,
1321 ETH_MIB_TX_ALL_PKTS,
1322 ETH_MIB_RX_ALL_OCTETS,
1323 ETH_MIB_RX_ALL_PKTS,
1324};
1325
1326
1327static void bcm_enet_get_drvinfo(struct net_device *netdev,
1328 struct ethtool_drvinfo *drvinfo)
1329{
1330 strlcpy(drvinfo->driver, bcm_enet_driver_name, sizeof(drvinfo->driver));
1331 strlcpy(drvinfo->version, bcm_enet_driver_version,
1332 sizeof(drvinfo->version));
1333 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
1334 strlcpy(drvinfo->bus_info, "bcm63xx", sizeof(drvinfo->bus_info));
1335}
1336
1337static int bcm_enet_get_sset_count(struct net_device *netdev,
1338 int string_set)
1339{
1340 switch (string_set) {
1341 case ETH_SS_STATS:
1342 return BCM_ENET_STATS_LEN;
1343 default:
1344 return -EINVAL;
1345 }
1346}
1347
1348static void bcm_enet_get_strings(struct net_device *netdev,
1349 u32 stringset, u8 *data)
1350{
1351 int i;
1352
1353 switch (stringset) {
1354 case ETH_SS_STATS:
1355 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1356 memcpy(data + i * ETH_GSTRING_LEN,
1357 bcm_enet_gstrings_stats[i].stat_string,
1358 ETH_GSTRING_LEN);
1359 }
1360 break;
1361 }
1362}
1363
1364static void update_mib_counters(struct bcm_enet_priv *priv)
1365{
1366 int i;
1367
1368 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1369 const struct bcm_enet_stats *s;
1370 u32 val;
1371 char *p;
1372
1373 s = &bcm_enet_gstrings_stats[i];
1374 if (s->mib_reg == -1)
1375 continue;
1376
1377 val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
1378 p = (char *)priv + s->stat_offset;
1379
1380 if (s->sizeof_stat == sizeof(u64))
1381 *(u64 *)p += val;
1382 else
1383 *(u32 *)p += val;
1384 }
1385
1386 /* also empty unused mib counters to make sure mib counter
1387 * overflow interrupt is cleared */
1388 for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
1389 (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
1390}
1391
1392static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
1393{
1394 struct bcm_enet_priv *priv;
1395
1396 priv = container_of(t, struct bcm_enet_priv, mib_update_task);
1397 mutex_lock(&priv->mib_update_lock);
1398 update_mib_counters(priv);
1399 mutex_unlock(&priv->mib_update_lock);
1400
1401 /* reenable mib interrupt */
1402 if (netif_running(priv->net_dev))
1403 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1404}
1405
1406static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
1407 struct ethtool_stats *stats,
1408 u64 *data)
1409{
1410 struct bcm_enet_priv *priv;
1411 int i;
1412
1413 priv = netdev_priv(netdev);
1414
1415 mutex_lock(&priv->mib_update_lock);
1416 update_mib_counters(priv);
1417
1418 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1419 const struct bcm_enet_stats *s;
1420 char *p;
1421
1422 s = &bcm_enet_gstrings_stats[i];
1423 if (s->mib_reg == -1)
1424 p = (char *)&netdev->stats;
1425 else
1426 p = (char *)priv;
1427 p += s->stat_offset;
1428 data[i] = (s->sizeof_stat == sizeof(u64)) ?
1429 *(u64 *)p : *(u32 *)p;
1430 }
1431 mutex_unlock(&priv->mib_update_lock);
1432}
1433
1434static int bcm_enet_nway_reset(struct net_device *dev)
1435{
1436 struct bcm_enet_priv *priv;
1437
1438 priv = netdev_priv(dev);
1439 if (priv->has_phy)
1440 return phy_ethtool_nway_reset(dev);
1441
1442 return -EOPNOTSUPP;
1443}
1444
1445static int bcm_enet_get_link_ksettings(struct net_device *dev,
1446 struct ethtool_link_ksettings *cmd)
1447{
1448 struct bcm_enet_priv *priv;
1449 u32 supported, advertising;
1450
1451 priv = netdev_priv(dev);
1452
1453 if (priv->has_phy) {
1454 if (!dev->phydev)
1455 return -ENODEV;
1456 return phy_ethtool_ksettings_get(dev->phydev, cmd);
1457 } else {
1458 cmd->base.autoneg = 0;
1459 cmd->base.speed = (priv->force_speed_100) ?
1460 SPEED_100 : SPEED_10;
1461 cmd->base.duplex = (priv->force_duplex_full) ?
1462 DUPLEX_FULL : DUPLEX_HALF;
1463 supported = ADVERTISED_10baseT_Half |
1464 ADVERTISED_10baseT_Full |
1465 ADVERTISED_100baseT_Half |
1466 ADVERTISED_100baseT_Full;
1467 advertising = 0;
1468 ethtool_convert_legacy_u32_to_link_mode(
1469 cmd->link_modes.supported, supported);
1470 ethtool_convert_legacy_u32_to_link_mode(
1471 cmd->link_modes.advertising, advertising);
1472 cmd->base.port = PORT_MII;
1473 }
1474 return 0;
1475}
1476
1477static int bcm_enet_set_link_ksettings(struct net_device *dev,
1478 const struct ethtool_link_ksettings *cmd)
1479{
1480 struct bcm_enet_priv *priv;
1481
1482 priv = netdev_priv(dev);
1483 if (priv->has_phy) {
1484 if (!dev->phydev)
1485 return -ENODEV;
1486 return phy_ethtool_ksettings_set(dev->phydev, cmd);
1487 } else {
1488
1489 if (cmd->base.autoneg ||
1490 (cmd->base.speed != SPEED_100 &&
1491 cmd->base.speed != SPEED_10) ||
1492 cmd->base.port != PORT_MII)
1493 return -EINVAL;
1494
1495 priv->force_speed_100 =
1496 (cmd->base.speed == SPEED_100) ? 1 : 0;
1497 priv->force_duplex_full =
1498 (cmd->base.duplex == DUPLEX_FULL) ? 1 : 0;
1499
1500 if (netif_running(dev))
1501 bcm_enet_adjust_link(dev);
1502 return 0;
1503 }
1504}
1505
1506static void bcm_enet_get_ringparam(struct net_device *dev,
1507 struct ethtool_ringparam *ering)
1508{
1509 struct bcm_enet_priv *priv;
1510
1511 priv = netdev_priv(dev);
1512
1513 /* rx/tx ring is actually only limited by memory */
1514 ering->rx_max_pending = 8192;
1515 ering->tx_max_pending = 8192;
1516 ering->rx_pending = priv->rx_ring_size;
1517 ering->tx_pending = priv->tx_ring_size;
1518}
1519
1520static int bcm_enet_set_ringparam(struct net_device *dev,
1521 struct ethtool_ringparam *ering)
1522{
1523 struct bcm_enet_priv *priv;
1524 int was_running;
1525
1526 priv = netdev_priv(dev);
1527
1528 was_running = 0;
1529 if (netif_running(dev)) {
1530 bcm_enet_stop(dev);
1531 was_running = 1;
1532 }
1533
1534 priv->rx_ring_size = ering->rx_pending;
1535 priv->tx_ring_size = ering->tx_pending;
1536
1537 if (was_running) {
1538 int err;
1539
1540 err = bcm_enet_open(dev);
1541 if (err)
1542 dev_close(dev);
1543 else
1544 bcm_enet_set_multicast_list(dev);
1545 }
1546 return 0;
1547}
1548
1549static void bcm_enet_get_pauseparam(struct net_device *dev,
1550 struct ethtool_pauseparam *ecmd)
1551{
1552 struct bcm_enet_priv *priv;
1553
1554 priv = netdev_priv(dev);
1555 ecmd->autoneg = priv->pause_auto;
1556 ecmd->rx_pause = priv->pause_rx;
1557 ecmd->tx_pause = priv->pause_tx;
1558}
1559
1560static int bcm_enet_set_pauseparam(struct net_device *dev,
1561 struct ethtool_pauseparam *ecmd)
1562{
1563 struct bcm_enet_priv *priv;
1564
1565 priv = netdev_priv(dev);
1566
1567 if (priv->has_phy) {
1568 if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
1569 /* asymetric pause mode not supported,
1570 * actually possible but integrated PHY has RO
1571 * asym_pause bit */
1572 return -EINVAL;
1573 }
1574 } else {
1575 /* no pause autoneg on direct mii connection */
1576 if (ecmd->autoneg)
1577 return -EINVAL;
1578 }
1579
1580 priv->pause_auto = ecmd->autoneg;
1581 priv->pause_rx = ecmd->rx_pause;
1582 priv->pause_tx = ecmd->tx_pause;
1583
1584 return 0;
1585}
1586
1587static const struct ethtool_ops bcm_enet_ethtool_ops = {
1588 .get_strings = bcm_enet_get_strings,
1589 .get_sset_count = bcm_enet_get_sset_count,
1590 .get_ethtool_stats = bcm_enet_get_ethtool_stats,
1591 .nway_reset = bcm_enet_nway_reset,
1592 .get_drvinfo = bcm_enet_get_drvinfo,
1593 .get_link = ethtool_op_get_link,
1594 .get_ringparam = bcm_enet_get_ringparam,
1595 .set_ringparam = bcm_enet_set_ringparam,
1596 .get_pauseparam = bcm_enet_get_pauseparam,
1597 .set_pauseparam = bcm_enet_set_pauseparam,
1598 .get_link_ksettings = bcm_enet_get_link_ksettings,
1599 .set_link_ksettings = bcm_enet_set_link_ksettings,
1600};
1601
1602static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1603{
1604 struct bcm_enet_priv *priv;
1605
1606 priv = netdev_priv(dev);
1607 if (priv->has_phy) {
1608 if (!dev->phydev)
1609 return -ENODEV;
1610 return phy_mii_ioctl(dev->phydev, rq, cmd);
1611 } else {
1612 struct mii_if_info mii;
1613
1614 mii.dev = dev;
1615 mii.mdio_read = bcm_enet_mdio_read_mii;
1616 mii.mdio_write = bcm_enet_mdio_write_mii;
1617 mii.phy_id = 0;
1618 mii.phy_id_mask = 0x3f;
1619 mii.reg_num_mask = 0x1f;
1620 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
1621 }
1622}
1623
1624/*
1625 * adjust mtu, can't be called while device is running
1626 */
1627static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
1628{
1629 struct bcm_enet_priv *priv = netdev_priv(dev);
1630 int actual_mtu = new_mtu;
1631
1632 if (netif_running(dev))
1633 return -EBUSY;
1634
1635 /* add ethernet header + vlan tag size */
1636 actual_mtu += VLAN_ETH_HLEN;
1637
1638 /*
1639 * setup maximum size before we get overflow mark in
1640 * descriptor, note that this will not prevent reception of
1641 * big frames, they will be split into multiple buffers
1642 * anyway
1643 */
1644 priv->hw_mtu = actual_mtu;
1645
1646 /*
1647 * align rx buffer size to dma burst len, account FCS since
1648 * it's appended
1649 */
1650 priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
1651 priv->dma_maxburst * 4);
1652
1653 dev->mtu = new_mtu;
1654 return 0;
1655}
1656
1657/*
1658 * preinit hardware to allow mii operation while device is down
1659 */
1660static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
1661{
1662 u32 val;
1663 int limit;
1664
1665 /* make sure mac is disabled */
1666 bcm_enet_disable_mac(priv);
1667
1668 /* soft reset mac */
1669 val = ENET_CTL_SRESET_MASK;
1670 enet_writel(priv, val, ENET_CTL_REG);
1671 wmb();
1672
1673 limit = 1000;
1674 do {
1675 val = enet_readl(priv, ENET_CTL_REG);
1676 if (!(val & ENET_CTL_SRESET_MASK))
1677 break;
1678 udelay(1);
1679 } while (limit--);
1680
1681 /* select correct mii interface */
1682 val = enet_readl(priv, ENET_CTL_REG);
1683 if (priv->use_external_mii)
1684 val |= ENET_CTL_EPHYSEL_MASK;
1685 else
1686 val &= ~ENET_CTL_EPHYSEL_MASK;
1687 enet_writel(priv, val, ENET_CTL_REG);
1688
1689 /* turn on mdc clock */
1690 enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
1691 ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
1692
1693 /* set mib counters to self-clear when read */
1694 val = enet_readl(priv, ENET_MIBCTL_REG);
1695 val |= ENET_MIBCTL_RDCLEAR_MASK;
1696 enet_writel(priv, val, ENET_MIBCTL_REG);
1697}
1698
1699static const struct net_device_ops bcm_enet_ops = {
1700 .ndo_open = bcm_enet_open,
1701 .ndo_stop = bcm_enet_stop,
1702 .ndo_start_xmit = bcm_enet_start_xmit,
1703 .ndo_set_mac_address = bcm_enet_set_mac_address,
1704 .ndo_set_rx_mode = bcm_enet_set_multicast_list,
1705 .ndo_do_ioctl = bcm_enet_ioctl,
1706 .ndo_change_mtu = bcm_enet_change_mtu,
1707};
1708
1709/*
1710 * allocate netdevice, request register memory and register device.
1711 */
1712static int bcm_enet_probe(struct platform_device *pdev)
1713{
1714 struct bcm_enet_priv *priv;
1715 struct net_device *dev;
1716 struct bcm63xx_enet_platform_data *pd;
1717 struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
1718 struct mii_bus *bus;
1719 const char *clk_name;
1720 int i, ret;
1721
1722 /* stop if shared driver failed, assume driver->probe will be
1723 * called in the same order we register devices (correct ?) */
1724 if (!bcm_enet_shared_base[0])
1725 return -ENODEV;
1726
1727 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1728 res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1729 res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
1730 if (!res_irq || !res_irq_rx || !res_irq_tx)
1731 return -ENODEV;
1732
1733 ret = 0;
1734 dev = alloc_etherdev(sizeof(*priv));
1735 if (!dev)
1736 return -ENOMEM;
1737 priv = netdev_priv(dev);
1738
1739 priv->enet_is_sw = false;
1740 priv->dma_maxburst = BCMENET_DMA_MAXBURST;
1741
1742 ret = bcm_enet_change_mtu(dev, dev->mtu);
1743 if (ret)
1744 goto out;
1745
1746 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1747 priv->base = devm_ioremap_resource(&pdev->dev, res_mem);
1748 if (IS_ERR(priv->base)) {
1749 ret = PTR_ERR(priv->base);
1750 goto out;
1751 }
1752
1753 dev->irq = priv->irq = res_irq->start;
1754 priv->irq_rx = res_irq_rx->start;
1755 priv->irq_tx = res_irq_tx->start;
1756 priv->mac_id = pdev->id;
1757
1758 /* get rx & tx dma channel id for this mac */
1759 if (priv->mac_id == 0) {
1760 priv->rx_chan = 0;
1761 priv->tx_chan = 1;
1762 clk_name = "enet0";
1763 } else {
1764 priv->rx_chan = 2;
1765 priv->tx_chan = 3;
1766 clk_name = "enet1";
1767 }
1768
1769 priv->mac_clk = clk_get(&pdev->dev, clk_name);
1770 if (IS_ERR(priv->mac_clk)) {
1771 ret = PTR_ERR(priv->mac_clk);
1772 goto out;
1773 }
1774 clk_prepare_enable(priv->mac_clk);
1775
1776 /* initialize default and fetch platform data */
1777 priv->rx_ring_size = BCMENET_DEF_RX_DESC;
1778 priv->tx_ring_size = BCMENET_DEF_TX_DESC;
1779
1780 pd = dev_get_platdata(&pdev->dev);
1781 if (pd) {
1782 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
1783 priv->has_phy = pd->has_phy;
1784 priv->phy_id = pd->phy_id;
1785 priv->has_phy_interrupt = pd->has_phy_interrupt;
1786 priv->phy_interrupt = pd->phy_interrupt;
1787 priv->use_external_mii = !pd->use_internal_phy;
1788 priv->pause_auto = pd->pause_auto;
1789 priv->pause_rx = pd->pause_rx;
1790 priv->pause_tx = pd->pause_tx;
1791 priv->force_duplex_full = pd->force_duplex_full;
1792 priv->force_speed_100 = pd->force_speed_100;
1793 priv->dma_chan_en_mask = pd->dma_chan_en_mask;
1794 priv->dma_chan_int_mask = pd->dma_chan_int_mask;
1795 priv->dma_chan_width = pd->dma_chan_width;
1796 priv->dma_has_sram = pd->dma_has_sram;
1797 priv->dma_desc_shift = pd->dma_desc_shift;
1798 }
1799
1800 if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
1801 /* using internal PHY, enable clock */
1802 priv->phy_clk = clk_get(&pdev->dev, "ephy");
1803 if (IS_ERR(priv->phy_clk)) {
1804 ret = PTR_ERR(priv->phy_clk);
1805 priv->phy_clk = NULL;
1806 goto out_put_clk_mac;
1807 }
1808 clk_prepare_enable(priv->phy_clk);
1809 }
1810
1811 /* do minimal hardware init to be able to probe mii bus */
1812 bcm_enet_hw_preinit(priv);
1813
1814 /* MII bus registration */
1815 if (priv->has_phy) {
1816
1817 priv->mii_bus = mdiobus_alloc();
1818 if (!priv->mii_bus) {
1819 ret = -ENOMEM;
1820 goto out_uninit_hw;
1821 }
1822
1823 bus = priv->mii_bus;
1824 bus->name = "bcm63xx_enet MII bus";
1825 bus->parent = &pdev->dev;
1826 bus->priv = priv;
1827 bus->read = bcm_enet_mdio_read_phylib;
1828 bus->write = bcm_enet_mdio_write_phylib;
1829 sprintf(bus->id, "%s-%d", pdev->name, priv->mac_id);
1830
1831 /* only probe bus where we think the PHY is, because
1832 * the mdio read operation return 0 instead of 0xffff
1833 * if a slave is not present on hw */
1834 bus->phy_mask = ~(1 << priv->phy_id);
1835
1836 if (priv->has_phy_interrupt)
1837 bus->irq[priv->phy_id] = priv->phy_interrupt;
1838
1839 ret = mdiobus_register(bus);
1840 if (ret) {
1841 dev_err(&pdev->dev, "unable to register mdio bus\n");
1842 goto out_free_mdio;
1843 }
1844 } else {
1845
1846 /* run platform code to initialize PHY device */
1847 if (pd && pd->mii_config &&
1848 pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
1849 bcm_enet_mdio_write_mii)) {
1850 dev_err(&pdev->dev, "unable to configure mdio bus\n");
1851 goto out_uninit_hw;
1852 }
1853 }
1854
1855 spin_lock_init(&priv->rx_lock);
1856
1857 /* init rx timeout (used for oom) */
1858 init_timer(&priv->rx_timeout);
1859 priv->rx_timeout.function = bcm_enet_refill_rx_timer;
1860 priv->rx_timeout.data = (unsigned long)dev;
1861
1862 /* init the mib update lock&work */
1863 mutex_init(&priv->mib_update_lock);
1864 INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
1865
1866 /* zero mib counters */
1867 for (i = 0; i < ENET_MIB_REG_COUNT; i++)
1868 enet_writel(priv, 0, ENET_MIB_REG(i));
1869
1870 /* register netdevice */
1871 dev->netdev_ops = &bcm_enet_ops;
1872 netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
1873
1874 dev->ethtool_ops = &bcm_enet_ethtool_ops;
1875 /* MTU range: 46 - 2028 */
1876 dev->min_mtu = ETH_ZLEN - ETH_HLEN;
1877 dev->max_mtu = BCMENET_MAX_MTU - VLAN_ETH_HLEN;
1878 SET_NETDEV_DEV(dev, &pdev->dev);
1879
1880 ret = register_netdev(dev);
1881 if (ret)
1882 goto out_unregister_mdio;
1883
1884 netif_carrier_off(dev);
1885 platform_set_drvdata(pdev, dev);
1886 priv->pdev = pdev;
1887 priv->net_dev = dev;
1888
1889 return 0;
1890
1891out_unregister_mdio:
1892 if (priv->mii_bus)
1893 mdiobus_unregister(priv->mii_bus);
1894
1895out_free_mdio:
1896 if (priv->mii_bus)
1897 mdiobus_free(priv->mii_bus);
1898
1899out_uninit_hw:
1900 /* turn off mdc clock */
1901 enet_writel(priv, 0, ENET_MIISC_REG);
1902 if (priv->phy_clk) {
1903 clk_disable_unprepare(priv->phy_clk);
1904 clk_put(priv->phy_clk);
1905 }
1906
1907out_put_clk_mac:
1908 clk_disable_unprepare(priv->mac_clk);
1909 clk_put(priv->mac_clk);
1910out:
1911 free_netdev(dev);
1912 return ret;
1913}
1914
1915
1916/*
1917 * exit func, stops hardware and unregisters netdevice
1918 */
1919static int bcm_enet_remove(struct platform_device *pdev)
1920{
1921 struct bcm_enet_priv *priv;
1922 struct net_device *dev;
1923
1924 /* stop netdevice */
1925 dev = platform_get_drvdata(pdev);
1926 priv = netdev_priv(dev);
1927 unregister_netdev(dev);
1928
1929 /* turn off mdc clock */
1930 enet_writel(priv, 0, ENET_MIISC_REG);
1931
1932 if (priv->has_phy) {
1933 mdiobus_unregister(priv->mii_bus);
1934 mdiobus_free(priv->mii_bus);
1935 } else {
1936 struct bcm63xx_enet_platform_data *pd;
1937
1938 pd = dev_get_platdata(&pdev->dev);
1939 if (pd && pd->mii_config)
1940 pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
1941 bcm_enet_mdio_write_mii);
1942 }
1943
1944 /* disable hw block clocks */
1945 if (priv->phy_clk) {
1946 clk_disable_unprepare(priv->phy_clk);
1947 clk_put(priv->phy_clk);
1948 }
1949 clk_disable_unprepare(priv->mac_clk);
1950 clk_put(priv->mac_clk);
1951
1952 free_netdev(dev);
1953 return 0;
1954}
1955
1956struct platform_driver bcm63xx_enet_driver = {
1957 .probe = bcm_enet_probe,
1958 .remove = bcm_enet_remove,
1959 .driver = {
1960 .name = "bcm63xx_enet",
1961 .owner = THIS_MODULE,
1962 },
1963};
1964
1965/*
1966 * switch mii access callbacks
1967 */
1968static int bcmenet_sw_mdio_read(struct bcm_enet_priv *priv,
1969 int ext, int phy_id, int location)
1970{
1971 u32 reg;
1972 int ret;
1973
1974 spin_lock_bh(&priv->enetsw_mdio_lock);
1975 enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
1976
1977 reg = ENETSW_MDIOC_RD_MASK |
1978 (phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
1979 (location << ENETSW_MDIOC_REG_SHIFT);
1980
1981 if (ext)
1982 reg |= ENETSW_MDIOC_EXT_MASK;
1983
1984 enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
1985 udelay(50);
1986 ret = enetsw_readw(priv, ENETSW_MDIOD_REG);
1987 spin_unlock_bh(&priv->enetsw_mdio_lock);
1988 return ret;
1989}
1990
1991static void bcmenet_sw_mdio_write(struct bcm_enet_priv *priv,
1992 int ext, int phy_id, int location,
1993 uint16_t data)
1994{
1995 u32 reg;
1996
1997 spin_lock_bh(&priv->enetsw_mdio_lock);
1998 enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
1999
2000 reg = ENETSW_MDIOC_WR_MASK |
2001 (phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
2002 (location << ENETSW_MDIOC_REG_SHIFT);
2003
2004 if (ext)
2005 reg |= ENETSW_MDIOC_EXT_MASK;
2006
2007 reg |= data;
2008
2009 enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
2010 udelay(50);
2011 spin_unlock_bh(&priv->enetsw_mdio_lock);
2012}
2013
2014static inline int bcm_enet_port_is_rgmii(int portid)
2015{
2016 return portid >= ENETSW_RGMII_PORT0;
2017}
2018
2019/*
2020 * enet sw PHY polling
2021 */
2022static void swphy_poll_timer(unsigned long data)
2023{
2024 struct bcm_enet_priv *priv = (struct bcm_enet_priv *)data;
2025 unsigned int i;
2026
2027 for (i = 0; i < priv->num_ports; i++) {
2028 struct bcm63xx_enetsw_port *port;
2029 int val, j, up, advertise, lpa, speed, duplex, media;
2030 int external_phy = bcm_enet_port_is_rgmii(i);
2031 u8 override;
2032
2033 port = &priv->used_ports[i];
2034 if (!port->used)
2035 continue;
2036
2037 if (port->bypass_link)
2038 continue;
2039
2040 /* dummy read to clear */
2041 for (j = 0; j < 2; j++)
2042 val = bcmenet_sw_mdio_read(priv, external_phy,
2043 port->phy_id, MII_BMSR);
2044
2045 if (val == 0xffff)
2046 continue;
2047
2048 up = (val & BMSR_LSTATUS) ? 1 : 0;
2049 if (!(up ^ priv->sw_port_link[i]))
2050 continue;
2051
2052 priv->sw_port_link[i] = up;
2053
2054 /* link changed */
2055 if (!up) {
2056 dev_info(&priv->pdev->dev, "link DOWN on %s\n",
2057 port->name);
2058 enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
2059 ENETSW_PORTOV_REG(i));
2060 enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
2061 ENETSW_PTCTRL_TXDIS_MASK,
2062 ENETSW_PTCTRL_REG(i));
2063 continue;
2064 }
2065
2066 advertise = bcmenet_sw_mdio_read(priv, external_phy,
2067 port->phy_id, MII_ADVERTISE);
2068
2069 lpa = bcmenet_sw_mdio_read(priv, external_phy, port->phy_id,
2070 MII_LPA);
2071
2072 /* figure out media and duplex from advertise and LPA values */
2073 media = mii_nway_result(lpa & advertise);
2074 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
2075
2076 if (media & (ADVERTISE_100FULL | ADVERTISE_100HALF))
2077 speed = 100;
2078 else
2079 speed = 10;
2080
2081 if (val & BMSR_ESTATEN) {
2082 advertise = bcmenet_sw_mdio_read(priv, external_phy,
2083 port->phy_id, MII_CTRL1000);
2084
2085 lpa = bcmenet_sw_mdio_read(priv, external_phy,
2086 port->phy_id, MII_STAT1000);
2087
2088 if (advertise & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)
2089 && lpa & (LPA_1000FULL | LPA_1000HALF)) {
2090 speed = 1000;
2091 duplex = (lpa & LPA_1000FULL);
2092 }
2093 }
2094
2095 dev_info(&priv->pdev->dev,
2096 "link UP on %s, %dMbps, %s-duplex\n",
2097 port->name, speed, duplex ? "full" : "half");
2098
2099 override = ENETSW_PORTOV_ENABLE_MASK |
2100 ENETSW_PORTOV_LINKUP_MASK;
2101
2102 if (speed == 1000)
2103 override |= ENETSW_IMPOV_1000_MASK;
2104 else if (speed == 100)
2105 override |= ENETSW_IMPOV_100_MASK;
2106 if (duplex)
2107 override |= ENETSW_IMPOV_FDX_MASK;
2108
2109 enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
2110 enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
2111 }
2112
2113 priv->swphy_poll.expires = jiffies + HZ;
2114 add_timer(&priv->swphy_poll);
2115}
2116
2117/*
2118 * open callback, allocate dma rings & buffers and start rx operation
2119 */
2120static int bcm_enetsw_open(struct net_device *dev)
2121{
2122 struct bcm_enet_priv *priv;
2123 struct device *kdev;
2124 int i, ret;
2125 unsigned int size;
2126 void *p;
2127 u32 val;
2128
2129 priv = netdev_priv(dev);
2130 kdev = &priv->pdev->dev;
2131
2132 /* mask all interrupts and request them */
2133 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
2134 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
2135
2136 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
2137 0, dev->name, dev);
2138 if (ret)
2139 goto out_freeirq;
2140
2141 if (priv->irq_tx != -1) {
2142 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
2143 0, dev->name, dev);
2144 if (ret)
2145 goto out_freeirq_rx;
2146 }
2147
2148 /* allocate rx dma ring */
2149 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
2150 p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
2151 if (!p) {
2152 dev_err(kdev, "cannot allocate rx ring %u\n", size);
2153 ret = -ENOMEM;
2154 goto out_freeirq_tx;
2155 }
2156
2157 memset(p, 0, size);
2158 priv->rx_desc_alloc_size = size;
2159 priv->rx_desc_cpu = p;
2160
2161 /* allocate tx dma ring */
2162 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
2163 p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
2164 if (!p) {
2165 dev_err(kdev, "cannot allocate tx ring\n");
2166 ret = -ENOMEM;
2167 goto out_free_rx_ring;
2168 }
2169
2170 memset(p, 0, size);
2171 priv->tx_desc_alloc_size = size;
2172 priv->tx_desc_cpu = p;
2173
2174 priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
2175 GFP_KERNEL);
2176 if (!priv->tx_skb) {
2177 dev_err(kdev, "cannot allocate rx skb queue\n");
2178 ret = -ENOMEM;
2179 goto out_free_tx_ring;
2180 }
2181
2182 priv->tx_desc_count = priv->tx_ring_size;
2183 priv->tx_dirty_desc = 0;
2184 priv->tx_curr_desc = 0;
2185 spin_lock_init(&priv->tx_lock);
2186
2187 /* init & fill rx ring with skbs */
2188 priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
2189 GFP_KERNEL);
2190 if (!priv->rx_skb) {
2191 dev_err(kdev, "cannot allocate rx skb queue\n");
2192 ret = -ENOMEM;
2193 goto out_free_tx_skb;
2194 }
2195
2196 priv->rx_desc_count = 0;
2197 priv->rx_dirty_desc = 0;
2198 priv->rx_curr_desc = 0;
2199
2200 /* disable all ports */
2201 for (i = 0; i < priv->num_ports; i++) {
2202 enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
2203 ENETSW_PORTOV_REG(i));
2204 enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
2205 ENETSW_PTCTRL_TXDIS_MASK,
2206 ENETSW_PTCTRL_REG(i));
2207
2208 priv->sw_port_link[i] = 0;
2209 }
2210
2211 /* reset mib */
2212 val = enetsw_readb(priv, ENETSW_GMCR_REG);
2213 val |= ENETSW_GMCR_RST_MIB_MASK;
2214 enetsw_writeb(priv, val, ENETSW_GMCR_REG);
2215 mdelay(1);
2216 val &= ~ENETSW_GMCR_RST_MIB_MASK;
2217 enetsw_writeb(priv, val, ENETSW_GMCR_REG);
2218 mdelay(1);
2219
2220 /* force CPU port state */
2221 val = enetsw_readb(priv, ENETSW_IMPOV_REG);
2222 val |= ENETSW_IMPOV_FORCE_MASK | ENETSW_IMPOV_LINKUP_MASK;
2223 enetsw_writeb(priv, val, ENETSW_IMPOV_REG);
2224
2225 /* enable switch forward engine */
2226 val = enetsw_readb(priv, ENETSW_SWMODE_REG);
2227 val |= ENETSW_SWMODE_FWD_EN_MASK;
2228 enetsw_writeb(priv, val, ENETSW_SWMODE_REG);
2229
2230 /* enable jumbo on all ports */
2231 enetsw_writel(priv, 0x1ff, ENETSW_JMBCTL_PORT_REG);
2232 enetsw_writew(priv, 9728, ENETSW_JMBCTL_MAXSIZE_REG);
2233
2234 /* initialize flow control buffer allocation */
2235 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
2236 ENETDMA_BUFALLOC_REG(priv->rx_chan));
2237
2238 if (bcm_enet_refill_rx(dev)) {
2239 dev_err(kdev, "cannot allocate rx skb queue\n");
2240 ret = -ENOMEM;
2241 goto out;
2242 }
2243
2244 /* write rx & tx ring addresses */
2245 enet_dmas_writel(priv, priv->rx_desc_dma,
2246 ENETDMAS_RSTART_REG, priv->rx_chan);
2247 enet_dmas_writel(priv, priv->tx_desc_dma,
2248 ENETDMAS_RSTART_REG, priv->tx_chan);
2249
2250 /* clear remaining state ram for rx & tx channel */
2251 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
2252 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
2253 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
2254 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
2255 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
2256 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
2257
2258 /* set dma maximum burst len */
2259 enet_dmac_writel(priv, priv->dma_maxburst,
2260 ENETDMAC_MAXBURST, priv->rx_chan);
2261 enet_dmac_writel(priv, priv->dma_maxburst,
2262 ENETDMAC_MAXBURST, priv->tx_chan);
2263
2264 /* set flow control low/high threshold to 1/3 / 2/3 */
2265 val = priv->rx_ring_size / 3;
2266 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
2267 val = (priv->rx_ring_size * 2) / 3;
2268 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
2269
2270 /* all set, enable mac and interrupts, start dma engine and
2271 * kick rx dma channel
2272 */
2273 wmb();
2274 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
2275 enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
2276 ENETDMAC_CHANCFG, priv->rx_chan);
2277
2278 /* watch "packet transferred" interrupt in rx and tx */
2279 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2280 ENETDMAC_IR, priv->rx_chan);
2281 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2282 ENETDMAC_IR, priv->tx_chan);
2283
2284 /* make sure we enable napi before rx interrupt */
2285 napi_enable(&priv->napi);
2286
2287 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2288 ENETDMAC_IRMASK, priv->rx_chan);
2289 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2290 ENETDMAC_IRMASK, priv->tx_chan);
2291
2292 netif_carrier_on(dev);
2293 netif_start_queue(dev);
2294
2295 /* apply override config for bypass_link ports here. */
2296 for (i = 0; i < priv->num_ports; i++) {
2297 struct bcm63xx_enetsw_port *port;
2298 u8 override;
2299 port = &priv->used_ports[i];
2300 if (!port->used)
2301 continue;
2302
2303 if (!port->bypass_link)
2304 continue;
2305
2306 override = ENETSW_PORTOV_ENABLE_MASK |
2307 ENETSW_PORTOV_LINKUP_MASK;
2308
2309 switch (port->force_speed) {
2310 case 1000:
2311 override |= ENETSW_IMPOV_1000_MASK;
2312 break;
2313 case 100:
2314 override |= ENETSW_IMPOV_100_MASK;
2315 break;
2316 case 10:
2317 break;
2318 default:
2319 pr_warn("invalid forced speed on port %s: assume 10\n",
2320 port->name);
2321 break;
2322 }
2323
2324 if (port->force_duplex_full)
2325 override |= ENETSW_IMPOV_FDX_MASK;
2326
2327
2328 enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
2329 enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
2330 }
2331
2332 /* start phy polling timer */
2333 init_timer(&priv->swphy_poll);
2334 priv->swphy_poll.function = swphy_poll_timer;
2335 priv->swphy_poll.data = (unsigned long)priv;
2336 priv->swphy_poll.expires = jiffies;
2337 add_timer(&priv->swphy_poll);
2338 return 0;
2339
2340out:
2341 for (i = 0; i < priv->rx_ring_size; i++) {
2342 struct bcm_enet_desc *desc;
2343
2344 if (!priv->rx_skb[i])
2345 continue;
2346
2347 desc = &priv->rx_desc_cpu[i];
2348 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
2349 DMA_FROM_DEVICE);
2350 kfree_skb(priv->rx_skb[i]);
2351 }
2352 kfree(priv->rx_skb);
2353
2354out_free_tx_skb:
2355 kfree(priv->tx_skb);
2356
2357out_free_tx_ring:
2358 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
2359 priv->tx_desc_cpu, priv->tx_desc_dma);
2360
2361out_free_rx_ring:
2362 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
2363 priv->rx_desc_cpu, priv->rx_desc_dma);
2364
2365out_freeirq_tx:
2366 if (priv->irq_tx != -1)
2367 free_irq(priv->irq_tx, dev);
2368
2369out_freeirq_rx:
2370 free_irq(priv->irq_rx, dev);
2371
2372out_freeirq:
2373 return ret;
2374}
2375
2376/* stop callback */
2377static int bcm_enetsw_stop(struct net_device *dev)
2378{
2379 struct bcm_enet_priv *priv;
2380 struct device *kdev;
2381 int i;
2382
2383 priv = netdev_priv(dev);
2384 kdev = &priv->pdev->dev;
2385
2386 del_timer_sync(&priv->swphy_poll);
2387 netif_stop_queue(dev);
2388 napi_disable(&priv->napi);
2389 del_timer_sync(&priv->rx_timeout);
2390
2391 /* mask all interrupts */
2392 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
2393 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
2394
2395 /* disable dma & mac */
2396 bcm_enet_disable_dma(priv, priv->tx_chan);
2397 bcm_enet_disable_dma(priv, priv->rx_chan);
2398
2399 /* force reclaim of all tx buffers */
2400 bcm_enet_tx_reclaim(dev, 1);
2401
2402 /* free the rx skb ring */
2403 for (i = 0; i < priv->rx_ring_size; i++) {
2404 struct bcm_enet_desc *desc;
2405
2406 if (!priv->rx_skb[i])
2407 continue;
2408
2409 desc = &priv->rx_desc_cpu[i];
2410 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
2411 DMA_FROM_DEVICE);
2412 kfree_skb(priv->rx_skb[i]);
2413 }
2414
2415 /* free remaining allocated memory */
2416 kfree(priv->rx_skb);
2417 kfree(priv->tx_skb);
2418 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
2419 priv->rx_desc_cpu, priv->rx_desc_dma);
2420 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
2421 priv->tx_desc_cpu, priv->tx_desc_dma);
2422 if (priv->irq_tx != -1)
2423 free_irq(priv->irq_tx, dev);
2424 free_irq(priv->irq_rx, dev);
2425
2426 return 0;
2427}
2428
2429/* try to sort out phy external status by walking the used_port field
2430 * in the bcm_enet_priv structure. in case the phy address is not
2431 * assigned to any physical port on the switch, assume it is external
2432 * (and yell at the user).
2433 */
2434static int bcm_enetsw_phy_is_external(struct bcm_enet_priv *priv, int phy_id)
2435{
2436 int i;
2437
2438 for (i = 0; i < priv->num_ports; ++i) {
2439 if (!priv->used_ports[i].used)
2440 continue;
2441 if (priv->used_ports[i].phy_id == phy_id)
2442 return bcm_enet_port_is_rgmii(i);
2443 }
2444
2445 printk_once(KERN_WARNING "bcm63xx_enet: could not find a used port with phy_id %i, assuming phy is external\n",
2446 phy_id);
2447 return 1;
2448}
2449
2450/* can't use bcmenet_sw_mdio_read directly as we need to sort out
2451 * external/internal status of the given phy_id first.
2452 */
2453static int bcm_enetsw_mii_mdio_read(struct net_device *dev, int phy_id,
2454 int location)
2455{
2456 struct bcm_enet_priv *priv;
2457
2458 priv = netdev_priv(dev);
2459 return bcmenet_sw_mdio_read(priv,
2460 bcm_enetsw_phy_is_external(priv, phy_id),
2461 phy_id, location);
2462}
2463
2464/* can't use bcmenet_sw_mdio_write directly as we need to sort out
2465 * external/internal status of the given phy_id first.
2466 */
2467static void bcm_enetsw_mii_mdio_write(struct net_device *dev, int phy_id,
2468 int location,
2469 int val)
2470{
2471 struct bcm_enet_priv *priv;
2472
2473 priv = netdev_priv(dev);
2474 bcmenet_sw_mdio_write(priv, bcm_enetsw_phy_is_external(priv, phy_id),
2475 phy_id, location, val);
2476}
2477
2478static int bcm_enetsw_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2479{
2480 struct mii_if_info mii;
2481
2482 mii.dev = dev;
2483 mii.mdio_read = bcm_enetsw_mii_mdio_read;
2484 mii.mdio_write = bcm_enetsw_mii_mdio_write;
2485 mii.phy_id = 0;
2486 mii.phy_id_mask = 0x3f;
2487 mii.reg_num_mask = 0x1f;
2488 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
2489
2490}
2491
2492static const struct net_device_ops bcm_enetsw_ops = {
2493 .ndo_open = bcm_enetsw_open,
2494 .ndo_stop = bcm_enetsw_stop,
2495 .ndo_start_xmit = bcm_enet_start_xmit,
2496 .ndo_change_mtu = bcm_enet_change_mtu,
2497 .ndo_do_ioctl = bcm_enetsw_ioctl,
2498};
2499
2500
2501static const struct bcm_enet_stats bcm_enetsw_gstrings_stats[] = {
2502 { "rx_packets", DEV_STAT(rx_packets), -1 },
2503 { "tx_packets", DEV_STAT(tx_packets), -1 },
2504 { "rx_bytes", DEV_STAT(rx_bytes), -1 },
2505 { "tx_bytes", DEV_STAT(tx_bytes), -1 },
2506 { "rx_errors", DEV_STAT(rx_errors), -1 },
2507 { "tx_errors", DEV_STAT(tx_errors), -1 },
2508 { "rx_dropped", DEV_STAT(rx_dropped), -1 },
2509 { "tx_dropped", DEV_STAT(tx_dropped), -1 },
2510
2511 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETHSW_MIB_RX_GD_OCT },
2512 { "tx_unicast", GEN_STAT(mib.tx_unicast), ETHSW_MIB_RX_BRDCAST },
2513 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETHSW_MIB_RX_BRDCAST },
2514 { "tx_multicast", GEN_STAT(mib.tx_mult), ETHSW_MIB_RX_MULT },
2515 { "tx_64_octets", GEN_STAT(mib.tx_64), ETHSW_MIB_RX_64 },
2516 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETHSW_MIB_RX_65_127 },
2517 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETHSW_MIB_RX_128_255 },
2518 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETHSW_MIB_RX_256_511 },
2519 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETHSW_MIB_RX_512_1023},
2520 { "tx_1024_1522_oct", GEN_STAT(mib.tx_1024_max),
2521 ETHSW_MIB_RX_1024_1522 },
2522 { "tx_1523_2047_oct", GEN_STAT(mib.tx_1523_2047),
2523 ETHSW_MIB_RX_1523_2047 },
2524 { "tx_2048_4095_oct", GEN_STAT(mib.tx_2048_4095),
2525 ETHSW_MIB_RX_2048_4095 },
2526 { "tx_4096_8191_oct", GEN_STAT(mib.tx_4096_8191),
2527 ETHSW_MIB_RX_4096_8191 },
2528 { "tx_8192_9728_oct", GEN_STAT(mib.tx_8192_9728),
2529 ETHSW_MIB_RX_8192_9728 },
2530 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR },
2531 { "tx_oversize_drop", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR_DISC },
2532 { "tx_dropped", GEN_STAT(mib.tx_drop), ETHSW_MIB_RX_DROP },
2533 { "tx_undersize", GEN_STAT(mib.tx_underrun), ETHSW_MIB_RX_UND },
2534 { "tx_pause", GEN_STAT(mib.tx_pause), ETHSW_MIB_RX_PAUSE },
2535
2536 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETHSW_MIB_TX_ALL_OCT },
2537 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETHSW_MIB_TX_BRDCAST },
2538 { "rx_multicast", GEN_STAT(mib.rx_mult), ETHSW_MIB_TX_MULT },
2539 { "rx_unicast", GEN_STAT(mib.rx_unicast), ETHSW_MIB_TX_MULT },
2540 { "rx_pause", GEN_STAT(mib.rx_pause), ETHSW_MIB_TX_PAUSE },
2541 { "rx_dropped", GEN_STAT(mib.rx_drop), ETHSW_MIB_TX_DROP_PKTS },
2542
2543};
2544
2545#define BCM_ENETSW_STATS_LEN \
2546 (sizeof(bcm_enetsw_gstrings_stats) / sizeof(struct bcm_enet_stats))
2547
2548static void bcm_enetsw_get_strings(struct net_device *netdev,
2549 u32 stringset, u8 *data)
2550{
2551 int i;
2552
2553 switch (stringset) {
2554 case ETH_SS_STATS:
2555 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2556 memcpy(data + i * ETH_GSTRING_LEN,
2557 bcm_enetsw_gstrings_stats[i].stat_string,
2558 ETH_GSTRING_LEN);
2559 }
2560 break;
2561 }
2562}
2563
2564static int bcm_enetsw_get_sset_count(struct net_device *netdev,
2565 int string_set)
2566{
2567 switch (string_set) {
2568 case ETH_SS_STATS:
2569 return BCM_ENETSW_STATS_LEN;
2570 default:
2571 return -EINVAL;
2572 }
2573}
2574
2575static void bcm_enetsw_get_drvinfo(struct net_device *netdev,
2576 struct ethtool_drvinfo *drvinfo)
2577{
2578 strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
2579 strncpy(drvinfo->version, bcm_enet_driver_version, 32);
2580 strncpy(drvinfo->fw_version, "N/A", 32);
2581 strncpy(drvinfo->bus_info, "bcm63xx", 32);
2582}
2583
2584static void bcm_enetsw_get_ethtool_stats(struct net_device *netdev,
2585 struct ethtool_stats *stats,
2586 u64 *data)
2587{
2588 struct bcm_enet_priv *priv;
2589 int i;
2590
2591 priv = netdev_priv(netdev);
2592
2593 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2594 const struct bcm_enet_stats *s;
2595 u32 lo, hi;
2596 char *p;
2597 int reg;
2598
2599 s = &bcm_enetsw_gstrings_stats[i];
2600
2601 reg = s->mib_reg;
2602 if (reg == -1)
2603 continue;
2604
2605 lo = enetsw_readl(priv, ENETSW_MIB_REG(reg));
2606 p = (char *)priv + s->stat_offset;
2607
2608 if (s->sizeof_stat == sizeof(u64)) {
2609 hi = enetsw_readl(priv, ENETSW_MIB_REG(reg + 1));
2610 *(u64 *)p = ((u64)hi << 32 | lo);
2611 } else {
2612 *(u32 *)p = lo;
2613 }
2614 }
2615
2616 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2617 const struct bcm_enet_stats *s;
2618 char *p;
2619
2620 s = &bcm_enetsw_gstrings_stats[i];
2621
2622 if (s->mib_reg == -1)
2623 p = (char *)&netdev->stats + s->stat_offset;
2624 else
2625 p = (char *)priv + s->stat_offset;
2626
2627 data[i] = (s->sizeof_stat == sizeof(u64)) ?
2628 *(u64 *)p : *(u32 *)p;
2629 }
2630}
2631
2632static void bcm_enetsw_get_ringparam(struct net_device *dev,
2633 struct ethtool_ringparam *ering)
2634{
2635 struct bcm_enet_priv *priv;
2636
2637 priv = netdev_priv(dev);
2638
2639 /* rx/tx ring is actually only limited by memory */
2640 ering->rx_max_pending = 8192;
2641 ering->tx_max_pending = 8192;
2642 ering->rx_mini_max_pending = 0;
2643 ering->rx_jumbo_max_pending = 0;
2644 ering->rx_pending = priv->rx_ring_size;
2645 ering->tx_pending = priv->tx_ring_size;
2646}
2647
2648static int bcm_enetsw_set_ringparam(struct net_device *dev,
2649 struct ethtool_ringparam *ering)
2650{
2651 struct bcm_enet_priv *priv;
2652 int was_running;
2653
2654 priv = netdev_priv(dev);
2655
2656 was_running = 0;
2657 if (netif_running(dev)) {
2658 bcm_enetsw_stop(dev);
2659 was_running = 1;
2660 }
2661
2662 priv->rx_ring_size = ering->rx_pending;
2663 priv->tx_ring_size = ering->tx_pending;
2664
2665 if (was_running) {
2666 int err;
2667
2668 err = bcm_enetsw_open(dev);
2669 if (err)
2670 dev_close(dev);
2671 }
2672 return 0;
2673}
2674
2675static struct ethtool_ops bcm_enetsw_ethtool_ops = {
2676 .get_strings = bcm_enetsw_get_strings,
2677 .get_sset_count = bcm_enetsw_get_sset_count,
2678 .get_ethtool_stats = bcm_enetsw_get_ethtool_stats,
2679 .get_drvinfo = bcm_enetsw_get_drvinfo,
2680 .get_ringparam = bcm_enetsw_get_ringparam,
2681 .set_ringparam = bcm_enetsw_set_ringparam,
2682};
2683
2684/* allocate netdevice, request register memory and register device. */
2685static int bcm_enetsw_probe(struct platform_device *pdev)
2686{
2687 struct bcm_enet_priv *priv;
2688 struct net_device *dev;
2689 struct bcm63xx_enetsw_platform_data *pd;
2690 struct resource *res_mem;
2691 int ret, irq_rx, irq_tx;
2692
2693 /* stop if shared driver failed, assume driver->probe will be
2694 * called in the same order we register devices (correct ?)
2695 */
2696 if (!bcm_enet_shared_base[0])
2697 return -ENODEV;
2698
2699 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2700 irq_rx = platform_get_irq(pdev, 0);
2701 irq_tx = platform_get_irq(pdev, 1);
2702 if (!res_mem || irq_rx < 0)
2703 return -ENODEV;
2704
2705 ret = 0;
2706 dev = alloc_etherdev(sizeof(*priv));
2707 if (!dev)
2708 return -ENOMEM;
2709 priv = netdev_priv(dev);
2710 memset(priv, 0, sizeof(*priv));
2711
2712 /* initialize default and fetch platform data */
2713 priv->enet_is_sw = true;
2714 priv->irq_rx = irq_rx;
2715 priv->irq_tx = irq_tx;
2716 priv->rx_ring_size = BCMENET_DEF_RX_DESC;
2717 priv->tx_ring_size = BCMENET_DEF_TX_DESC;
2718 priv->dma_maxburst = BCMENETSW_DMA_MAXBURST;
2719
2720 pd = dev_get_platdata(&pdev->dev);
2721 if (pd) {
2722 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
2723 memcpy(priv->used_ports, pd->used_ports,
2724 sizeof(pd->used_ports));
2725 priv->num_ports = pd->num_ports;
2726 priv->dma_has_sram = pd->dma_has_sram;
2727 priv->dma_chan_en_mask = pd->dma_chan_en_mask;
2728 priv->dma_chan_int_mask = pd->dma_chan_int_mask;
2729 priv->dma_chan_width = pd->dma_chan_width;
2730 }
2731
2732 ret = bcm_enet_change_mtu(dev, dev->mtu);
2733 if (ret)
2734 goto out;
2735
2736 if (!request_mem_region(res_mem->start, resource_size(res_mem),
2737 "bcm63xx_enetsw")) {
2738 ret = -EBUSY;
2739 goto out;
2740 }
2741
2742 priv->base = ioremap(res_mem->start, resource_size(res_mem));
2743 if (priv->base == NULL) {
2744 ret = -ENOMEM;
2745 goto out_release_mem;
2746 }
2747
2748 priv->mac_clk = clk_get(&pdev->dev, "enetsw");
2749 if (IS_ERR(priv->mac_clk)) {
2750 ret = PTR_ERR(priv->mac_clk);
2751 goto out_unmap;
2752 }
2753 clk_enable(priv->mac_clk);
2754
2755 priv->rx_chan = 0;
2756 priv->tx_chan = 1;
2757 spin_lock_init(&priv->rx_lock);
2758
2759 /* init rx timeout (used for oom) */
2760 init_timer(&priv->rx_timeout);
2761 priv->rx_timeout.function = bcm_enet_refill_rx_timer;
2762 priv->rx_timeout.data = (unsigned long)dev;
2763
2764 /* register netdevice */
2765 dev->netdev_ops = &bcm_enetsw_ops;
2766 netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
2767 dev->ethtool_ops = &bcm_enetsw_ethtool_ops;
2768 SET_NETDEV_DEV(dev, &pdev->dev);
2769
2770 spin_lock_init(&priv->enetsw_mdio_lock);
2771
2772 ret = register_netdev(dev);
2773 if (ret)
2774 goto out_put_clk;
2775
2776 netif_carrier_off(dev);
2777 platform_set_drvdata(pdev, dev);
2778 priv->pdev = pdev;
2779 priv->net_dev = dev;
2780
2781 return 0;
2782
2783out_put_clk:
2784 clk_put(priv->mac_clk);
2785
2786out_unmap:
2787 iounmap(priv->base);
2788
2789out_release_mem:
2790 release_mem_region(res_mem->start, resource_size(res_mem));
2791out:
2792 free_netdev(dev);
2793 return ret;
2794}
2795
2796
2797/* exit func, stops hardware and unregisters netdevice */
2798static int bcm_enetsw_remove(struct platform_device *pdev)
2799{
2800 struct bcm_enet_priv *priv;
2801 struct net_device *dev;
2802 struct resource *res;
2803
2804 /* stop netdevice */
2805 dev = platform_get_drvdata(pdev);
2806 priv = netdev_priv(dev);
2807 unregister_netdev(dev);
2808
2809 /* release device resources */
2810 iounmap(priv->base);
2811 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2812 release_mem_region(res->start, resource_size(res));
2813
2814 free_netdev(dev);
2815 return 0;
2816}
2817
2818struct platform_driver bcm63xx_enetsw_driver = {
2819 .probe = bcm_enetsw_probe,
2820 .remove = bcm_enetsw_remove,
2821 .driver = {
2822 .name = "bcm63xx_enetsw",
2823 .owner = THIS_MODULE,
2824 },
2825};
2826
2827/* reserve & remap memory space shared between all macs */
2828static int bcm_enet_shared_probe(struct platform_device *pdev)
2829{
2830 struct resource *res;
2831 void __iomem *p[3];
2832 unsigned int i;
2833
2834 memset(bcm_enet_shared_base, 0, sizeof(bcm_enet_shared_base));
2835
2836 for (i = 0; i < 3; i++) {
2837 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
2838 p[i] = devm_ioremap_resource(&pdev->dev, res);
2839 if (IS_ERR(p[i]))
2840 return PTR_ERR(p[i]);
2841 }
2842
2843 memcpy(bcm_enet_shared_base, p, sizeof(bcm_enet_shared_base));
2844
2845 return 0;
2846}
2847
2848static int bcm_enet_shared_remove(struct platform_device *pdev)
2849{
2850 return 0;
2851}
2852
2853/* this "shared" driver is needed because both macs share a single
2854 * address space
2855 */
2856struct platform_driver bcm63xx_enet_shared_driver = {
2857 .probe = bcm_enet_shared_probe,
2858 .remove = bcm_enet_shared_remove,
2859 .driver = {
2860 .name = "bcm63xx_enet_shared",
2861 .owner = THIS_MODULE,
2862 },
2863};
2864
2865static struct platform_driver * const drivers[] = {
2866 &bcm63xx_enet_shared_driver,
2867 &bcm63xx_enet_driver,
2868 &bcm63xx_enetsw_driver,
2869};
2870
2871/* entry point */
2872static int __init bcm_enet_init(void)
2873{
2874 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
2875}
2876
2877static void __exit bcm_enet_exit(void)
2878{
2879 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
2880}
2881
2882
2883module_init(bcm_enet_init);
2884module_exit(bcm_enet_exit);
2885
2886MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
2887MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
2888MODULE_LICENSE("GPL");