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net: introduce IFF_UNICAST_FLT private flag
[linux-2.6-block.git] / drivers / net / ethernet / broadcom / bcm63xx_enet.c
CommitLineData
9b1fc55a
MB		 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>
539d3ee6 21#include <linux/interrupt.h>
9b1fc55a
MB		 22#include <linux/module.h>
23#include <linux/clk.h>
24#include <linux/etherdevice.h>
5a0e3ad6 25#include <linux/slab.h>
9b1fc55a
MB		 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 memory shared between all devices */
45static void __iomem *bcm_enet_shared_base;
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 shared registers
63 */
64static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
65{
66 return bcm_readl(bcm_enet_shared_base + off);
67}
68
69static inline void enet_dma_writel(struct bcm_enet_priv *priv,
70 u32 val, u32 off)
71{
72 bcm_writel(val, bcm_enet_shared_base + off);
73}
74
75/*
76 * write given data into mii register and wait for transfer to end
77 * with timeout (average measured transfer time is 25us)
78 */
79static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
80{
81 int limit;
82
83 /* make sure mii interrupt status is cleared */
84 enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
85
86 enet_writel(priv, data, ENET_MIIDATA_REG);
87 wmb();
88
89 /* busy wait on mii interrupt bit, with timeout */
90 limit = 1000;
91 do {
92 if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
93 break;
94 udelay(1);
ec1652af 95 } while (limit-- > 0);
9b1fc55a
MB		 96
97 return (limit < 0) ? 1 : 0;
98}
99
100/*
101 * MII internal read callback
102 */
103static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
104 int regnum)
105{
106 u32 tmp, val;
107
108 tmp = regnum << ENET_MIIDATA_REG_SHIFT;
109 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
110 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
111 tmp |= ENET_MIIDATA_OP_READ_MASK;
112
113 if (do_mdio_op(priv, tmp))
114 return -1;
115
116 val = enet_readl(priv, ENET_MIIDATA_REG);
117 val &= 0xffff;
118 return val;
119}
120
121/*
122 * MII internal write callback
123 */
124static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
125 int regnum, u16 value)
126{
127 u32 tmp;
128
129 tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
130 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
131 tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
132 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
133 tmp |= ENET_MIIDATA_OP_WRITE_MASK;
134
135 (void)do_mdio_op(priv, tmp);
136 return 0;
137}
138
139/*
140 * MII read callback from phylib
141 */
142static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
143 int regnum)
144{
145 return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
146}
147
148/*
149 * MII write callback from phylib
150 */
151static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
152 int regnum, u16 value)
153{
154 return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
155}
156
157/*
158 * MII read callback from mii core
159 */
160static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
161 int regnum)
162{
163 return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
164}
165
166/*
167 * MII write callback from mii core
168 */
169static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
170 int regnum, int value)
171{
172 bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
173}
174
175/*
176 * refill rx queue
177 */
178static int bcm_enet_refill_rx(struct net_device *dev)
179{
180 struct bcm_enet_priv *priv;
181
182 priv = netdev_priv(dev);
183
184 while (priv->rx_desc_count < priv->rx_ring_size) {
185 struct bcm_enet_desc *desc;
186 struct sk_buff *skb;
187 dma_addr_t p;
188 int desc_idx;
189 u32 len_stat;
190
191 desc_idx = priv->rx_dirty_desc;
192 desc = &priv->rx_desc_cpu[desc_idx];
193
194 if (!priv->rx_skb[desc_idx]) {
195 skb = netdev_alloc_skb(dev, priv->rx_skb_size);
196 if (!skb)
197 break;
198 priv->rx_skb[desc_idx] = skb;
199
200 p = dma_map_single(&priv->pdev->dev, skb->data,
201 priv->rx_skb_size,
202 DMA_FROM_DEVICE);
203 desc->address = p;
204 }
205
206 len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
207 len_stat |= DMADESC_OWNER_MASK;
208 if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
209 len_stat |= DMADESC_WRAP_MASK;
210 priv->rx_dirty_desc = 0;
211 } else {
212 priv->rx_dirty_desc++;
213 }
214 wmb();
215 desc->len_stat = len_stat;
216
217 priv->rx_desc_count++;
218
219 /* tell dma engine we allocated one buffer */
220 enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
221 }
222
223 /* If rx ring is still empty, set a timer to try allocating
224 * again at a later time. */
225 if (priv->rx_desc_count == 0 && netif_running(dev)) {
226 dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
227 priv->rx_timeout.expires = jiffies + HZ;
228 add_timer(&priv->rx_timeout);
229 }
230
231 return 0;
232}
233
234/*
235 * timer callback to defer refill rx queue in case we're OOM
236 */
237static void bcm_enet_refill_rx_timer(unsigned long data)
238{
239 struct net_device *dev;
240 struct bcm_enet_priv *priv;
241
242 dev = (struct net_device *)data;
243 priv = netdev_priv(dev);
244
245 spin_lock(&priv->rx_lock);
246 bcm_enet_refill_rx((struct net_device *)data);
247 spin_unlock(&priv->rx_lock);
248}
249
250/*
251 * extract packet from rx queue
252 */
253static int bcm_enet_receive_queue(struct net_device *dev, int budget)
254{
255 struct bcm_enet_priv *priv;
256 struct device *kdev;
257 int processed;
258
259 priv = netdev_priv(dev);
260 kdev = &priv->pdev->dev;
261 processed = 0;
262
263 /* don't scan ring further than number of refilled
264 * descriptor */
265 if (budget > priv->rx_desc_count)
266 budget = priv->rx_desc_count;
267
268 do {
269 struct bcm_enet_desc *desc;
270 struct sk_buff *skb;
271 int desc_idx;
272 u32 len_stat;
273 unsigned int len;
274
275 desc_idx = priv->rx_curr_desc;
276 desc = &priv->rx_desc_cpu[desc_idx];
277
278 /* make sure we actually read the descriptor status at
279 * each loop */
280 rmb();
281
282 len_stat = desc->len_stat;
283
284 /* break if dma ownership belongs to hw */
285 if (len_stat & DMADESC_OWNER_MASK)
286 break;
287
288 processed++;
289 priv->rx_curr_desc++;
290 if (priv->rx_curr_desc == priv->rx_ring_size)
291 priv->rx_curr_desc = 0;
292 priv->rx_desc_count--;
293
294 /* if the packet does not have start of packet _and_
295 * end of packet flag set, then just recycle it */
296 if ((len_stat & DMADESC_ESOP_MASK) != DMADESC_ESOP_MASK) {
c32d83c0 297 dev->stats.rx_dropped++;
9b1fc55a
MB		 298 continue;
299 }
300
301 /* recycle packet if it's marked as bad */
302 if (unlikely(len_stat & DMADESC_ERR_MASK)) {
c32d83c0 303 dev->stats.rx_errors++;
9b1fc55a
MB		 304
305 if (len_stat & DMADESC_OVSIZE_MASK)
c32d83c0 306 dev->stats.rx_length_errors++;
9b1fc55a 307 if (len_stat & DMADESC_CRC_MASK)
c32d83c0 308 dev->stats.rx_crc_errors++;
9b1fc55a 309 if (len_stat & DMADESC_UNDER_MASK)
c32d83c0 310 dev->stats.rx_frame_errors++;
9b1fc55a 311 if (len_stat & DMADESC_OV_MASK)
c32d83c0 312 dev->stats.rx_fifo_errors++;
9b1fc55a
MB		 313 continue;
314 }
315
316 /* valid packet */
317 skb = priv->rx_skb[desc_idx];
318 len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
319 /* don't include FCS */
320 len -= 4;
321
322 if (len < copybreak) {
323 struct sk_buff *nskb;
324
89d71a66 325 nskb = netdev_alloc_skb_ip_align(dev, len);
9b1fc55a
MB		 326 if (!nskb) {
327 /* forget packet, just rearm desc */
c32d83c0 328 dev->stats.rx_dropped++;
9b1fc55a
MB		 329 continue;
330 }
331
9b1fc55a
MB		 332 dma_sync_single_for_cpu(kdev, desc->address,
333 len, DMA_FROM_DEVICE);
334 memcpy(nskb->data, skb->data, len);
335 dma_sync_single_for_device(kdev, desc->address,
336 len, DMA_FROM_DEVICE);
337 skb = nskb;
338 } else {
339 dma_unmap_single(&priv->pdev->dev, desc->address,
340 priv->rx_skb_size, DMA_FROM_DEVICE);
341 priv->rx_skb[desc_idx] = NULL;
342 }
343
344 skb_put(skb, len);
9b1fc55a 345 skb->protocol = eth_type_trans(skb, dev);
c32d83c0
ED		 346 dev->stats.rx_packets++;
347 dev->stats.rx_bytes += len;
9b1fc55a
MB		 348 netif_receive_skb(skb);
349
350 } while (--budget > 0);
351
352 if (processed || !priv->rx_desc_count) {
353 bcm_enet_refill_rx(dev);
354
355 /* kick rx dma */
356 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
357 ENETDMA_CHANCFG_REG(priv->rx_chan));
358 }
359
360 return processed;
361}
362
363
364/*
365 * try to or force reclaim of transmitted buffers
366 */
367static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
368{
369 struct bcm_enet_priv *priv;
370 int released;
371
372 priv = netdev_priv(dev);
373 released = 0;
374
375 while (priv->tx_desc_count < priv->tx_ring_size) {
376 struct bcm_enet_desc *desc;
377 struct sk_buff *skb;
378
379 /* We run in a bh and fight against start_xmit, which
380 * is called with bh disabled */
381 spin_lock(&priv->tx_lock);
382
383 desc = &priv->tx_desc_cpu[priv->tx_dirty_desc];
384
385 if (!force && (desc->len_stat & DMADESC_OWNER_MASK)) {
386 spin_unlock(&priv->tx_lock);
387 break;
388 }
389
390 /* ensure other field of the descriptor were not read
391 * before we checked ownership */
392 rmb();
393
394 skb = priv->tx_skb[priv->tx_dirty_desc];
395 priv->tx_skb[priv->tx_dirty_desc] = NULL;
396 dma_unmap_single(&priv->pdev->dev, desc->address, skb->len,
397 DMA_TO_DEVICE);
398
399 priv->tx_dirty_desc++;
400 if (priv->tx_dirty_desc == priv->tx_ring_size)
401 priv->tx_dirty_desc = 0;
402 priv->tx_desc_count++;
403
404 spin_unlock(&priv->tx_lock);
405
406 if (desc->len_stat & DMADESC_UNDER_MASK)
c32d83c0 407 dev->stats.tx_errors++;
9b1fc55a
MB		 408
409 dev_kfree_skb(skb);
410 released++;
411 }
412
413 if (netif_queue_stopped(dev) && released)
414 netif_wake_queue(dev);
415
416 return released;
417}
418
419/*
420 * poll func, called by network core
421 */
422static int bcm_enet_poll(struct napi_struct *napi, int budget)
423{
424 struct bcm_enet_priv *priv;
425 struct net_device *dev;
426 int tx_work_done, rx_work_done;
427
428 priv = container_of(napi, struct bcm_enet_priv, napi);
429 dev = priv->net_dev;
430
431 /* ack interrupts */
432 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
433 ENETDMA_IR_REG(priv->rx_chan));
434 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
435 ENETDMA_IR_REG(priv->tx_chan));
436
437 /* reclaim sent skb */
438 tx_work_done = bcm_enet_tx_reclaim(dev, 0);
439
440 spin_lock(&priv->rx_lock);
441 rx_work_done = bcm_enet_receive_queue(dev, budget);
442 spin_unlock(&priv->rx_lock);
443
444 if (rx_work_done >= budget || tx_work_done > 0) {
445 /* rx/tx queue is not yet empty/clean */
446 return rx_work_done;
447 }
448
449 /* no more packet in rx/tx queue, remove device from poll
450 * queue */
451 napi_complete(napi);
452
453 /* restore rx/tx interrupt */
454 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
455 ENETDMA_IRMASK_REG(priv->rx_chan));
456 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
457 ENETDMA_IRMASK_REG(priv->tx_chan));
458
459 return rx_work_done;
460}
461
462/*
463 * mac interrupt handler
464 */
465static irqreturn_t bcm_enet_isr_mac(int irq, void *dev_id)
466{
467 struct net_device *dev;
468 struct bcm_enet_priv *priv;
469 u32 stat;
470
471 dev = dev_id;
472 priv = netdev_priv(dev);
473
474 stat = enet_readl(priv, ENET_IR_REG);
475 if (!(stat & ENET_IR_MIB))
476 return IRQ_NONE;
477
478 /* clear & mask interrupt */
479 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
480 enet_writel(priv, 0, ENET_IRMASK_REG);
481
482 /* read mib registers in workqueue */
483 schedule_work(&priv->mib_update_task);
484
485 return IRQ_HANDLED;
486}
487
488/*
489 * rx/tx dma interrupt handler
490 */
491static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
492{
493 struct net_device *dev;
494 struct bcm_enet_priv *priv;
495
496 dev = dev_id;
497 priv = netdev_priv(dev);
498
499 /* mask rx/tx interrupts */
500 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
501 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
502
503 napi_schedule(&priv->napi);
504
505 return IRQ_HANDLED;
506}
507
508/*
509 * tx request callback
510 */
511static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
512{
513 struct bcm_enet_priv *priv;
514 struct bcm_enet_desc *desc;
515 u32 len_stat;
516 int ret;
517
518 priv = netdev_priv(dev);
519
520 /* lock against tx reclaim */
521 spin_lock(&priv->tx_lock);
522
523 /* make sure the tx hw queue is not full, should not happen
524 * since we stop queue before it's the case */
525 if (unlikely(!priv->tx_desc_count)) {
526 netif_stop_queue(dev);
527 dev_err(&priv->pdev->dev, "xmit called with no tx desc "
528 "available?\n");
529 ret = NETDEV_TX_BUSY;
530 goto out_unlock;
531 }
532
533 /* point to the next available desc */
534 desc = &priv->tx_desc_cpu[priv->tx_curr_desc];
535 priv->tx_skb[priv->tx_curr_desc] = skb;
536
537 /* fill descriptor */
538 desc->address = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
539 DMA_TO_DEVICE);
540
541 len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
542 len_stat |= DMADESC_ESOP_MASK |
543 DMADESC_APPEND_CRC |
544 DMADESC_OWNER_MASK;
545
546 priv->tx_curr_desc++;
547 if (priv->tx_curr_desc == priv->tx_ring_size) {
548 priv->tx_curr_desc = 0;
549 len_stat |= DMADESC_WRAP_MASK;
550 }
551 priv->tx_desc_count--;
552
553 /* dma might be already polling, make sure we update desc
554 * fields in correct order */
555 wmb();
556 desc->len_stat = len_stat;
557 wmb();
558
559 /* kick tx dma */
560 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
561 ENETDMA_CHANCFG_REG(priv->tx_chan));
562
563 /* stop queue if no more desc available */
564 if (!priv->tx_desc_count)
565 netif_stop_queue(dev);
566
c32d83c0
ED		 567 dev->stats.tx_bytes += skb->len;
568 dev->stats.tx_packets++;
9b1fc55a
MB		 569 ret = NETDEV_TX_OK;
570
571out_unlock:
572 spin_unlock(&priv->tx_lock);
573 return ret;
574}
575
576/*
577 * Change the interface's mac address.
578 */
579static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
580{
581 struct bcm_enet_priv *priv;
582 struct sockaddr *addr = p;
583 u32 val;
584
585 priv = netdev_priv(dev);
586 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
587
588 /* use perfect match register 0 to store my mac address */
589 val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
590 (dev->dev_addr[4] << 8) | dev->dev_addr[5];
591 enet_writel(priv, val, ENET_PML_REG(0));
592
593 val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
594 val |= ENET_PMH_DATAVALID_MASK;
595 enet_writel(priv, val, ENET_PMH_REG(0));
596
597 return 0;
598}
599
600/*
25985edc 601 * Change rx mode (promiscuous/allmulti) and update multicast list
9b1fc55a
MB		 602 */
603static void bcm_enet_set_multicast_list(struct net_device *dev)
604{
605 struct bcm_enet_priv *priv;
22bedad3 606 struct netdev_hw_addr *ha;
9b1fc55a
MB		 607 u32 val;
608 int i;
609
610 priv = netdev_priv(dev);
611
612 val = enet_readl(priv, ENET_RXCFG_REG);
613
614 if (dev->flags & IFF_PROMISC)
615 val |= ENET_RXCFG_PROMISC_MASK;
616 else
617 val &= ~ENET_RXCFG_PROMISC_MASK;
618
619 /* only 3 perfect match registers left, first one is used for
620 * own mac address */
4cd24eaf 621 if ((dev->flags & IFF_ALLMULTI) || netdev_mc_count(dev) > 3)
9b1fc55a
MB		 622 val |= ENET_RXCFG_ALLMCAST_MASK;
623 else
624 val &= ~ENET_RXCFG_ALLMCAST_MASK;
625
626 /* no need to set perfect match registers if we catch all
627 * multicast */
628 if (val & ENET_RXCFG_ALLMCAST_MASK) {
629 enet_writel(priv, val, ENET_RXCFG_REG);
630 return;
631 }
632
0ddf477b 633 i = 0;
22bedad3 634 netdev_for_each_mc_addr(ha, dev) {
9b1fc55a
MB		 635 u8 *dmi_addr;
636 u32 tmp;
637
0ddf477b
JP		 638 if (i == 3)
639 break;
9b1fc55a 640 /* update perfect match registers */
22bedad3 641 dmi_addr = ha->addr;
9b1fc55a
MB		 642 tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
643 (dmi_addr[4] << 8) | dmi_addr[5];
644 enet_writel(priv, tmp, ENET_PML_REG(i + 1));
645
646 tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
647 tmp |= ENET_PMH_DATAVALID_MASK;
0ddf477b 648 enet_writel(priv, tmp, ENET_PMH_REG(i++ + 1));
9b1fc55a
MB		 649 }
650
651 for (; i < 3; i++) {
652 enet_writel(priv, 0, ENET_PML_REG(i + 1));
653 enet_writel(priv, 0, ENET_PMH_REG(i + 1));
654 }
655
656 enet_writel(priv, val, ENET_RXCFG_REG);
657}
658
659/*
660 * set mac duplex parameters
661 */
662static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
663{
664 u32 val;
665
666 val = enet_readl(priv, ENET_TXCTL_REG);
667 if (fullduplex)
668 val |= ENET_TXCTL_FD_MASK;
669 else
670 val &= ~ENET_TXCTL_FD_MASK;
671 enet_writel(priv, val, ENET_TXCTL_REG);
672}
673
674/*
675 * set mac flow control parameters
676 */
677static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
678{
679 u32 val;
680
681 /* rx flow control (pause frame handling) */
682 val = enet_readl(priv, ENET_RXCFG_REG);
683 if (rx_en)
684 val |= ENET_RXCFG_ENFLOW_MASK;
685 else
686 val &= ~ENET_RXCFG_ENFLOW_MASK;
687 enet_writel(priv, val, ENET_RXCFG_REG);
688
689 /* tx flow control (pause frame generation) */
690 val = enet_dma_readl(priv, ENETDMA_CFG_REG);
691 if (tx_en)
692 val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
693 else
694 val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
695 enet_dma_writel(priv, val, ENETDMA_CFG_REG);
696}
697
698/*
699 * link changed callback (from phylib)
700 */
701static void bcm_enet_adjust_phy_link(struct net_device *dev)
702{
703 struct bcm_enet_priv *priv;
704 struct phy_device *phydev;
705 int status_changed;
706
707 priv = netdev_priv(dev);
708 phydev = priv->phydev;
709 status_changed = 0;
710
711 if (priv->old_link != phydev->link) {
712 status_changed = 1;
713 priv->old_link = phydev->link;
714 }
715
716 /* reflect duplex change in mac configuration */
717 if (phydev->link && phydev->duplex != priv->old_duplex) {
718 bcm_enet_set_duplex(priv,
719 (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
720 status_changed = 1;
721 priv->old_duplex = phydev->duplex;
722 }
723
724 /* enable flow control if remote advertise it (trust phylib to
725 * check that duplex is full */
726 if (phydev->link && phydev->pause != priv->old_pause) {
727 int rx_pause_en, tx_pause_en;
728
729 if (phydev->pause) {
730 /* pause was advertised by lpa and us */
731 rx_pause_en = 1;
732 tx_pause_en = 1;
733 } else if (!priv->pause_auto) {
734 /* pause setting overrided by user */
735 rx_pause_en = priv->pause_rx;
736 tx_pause_en = priv->pause_tx;
737 } else {
738 rx_pause_en = 0;
739 tx_pause_en = 0;
740 }
741
742 bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
743 status_changed = 1;
744 priv->old_pause = phydev->pause;
745 }
746
747 if (status_changed) {
748 pr_info("%s: link %s", dev->name, phydev->link ?
749 "UP" : "DOWN");
750 if (phydev->link)
751 pr_cont(" - %d/%s - flow control %s", phydev->speed,
752 DUPLEX_FULL == phydev->duplex ? "full" : "half",
753 phydev->pause == 1 ? "rx&tx" : "off");
754
755 pr_cont("\n");
756 }
757}
758
759/*
760 * link changed callback (if phylib is not used)
761 */
762static void bcm_enet_adjust_link(struct net_device *dev)
763{
764 struct bcm_enet_priv *priv;
765
766 priv = netdev_priv(dev);
767 bcm_enet_set_duplex(priv, priv->force_duplex_full);
768 bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
769 netif_carrier_on(dev);
770
771 pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
772 dev->name,
773 priv->force_speed_100 ? 100 : 10,
774 priv->force_duplex_full ? "full" : "half",
775 priv->pause_rx ? "rx" : "off",
776 priv->pause_tx ? "tx" : "off");
777}
778
779/*
780 * open callback, allocate dma rings & buffers and start rx operation
781 */
782static int bcm_enet_open(struct net_device *dev)
783{
784 struct bcm_enet_priv *priv;
785 struct sockaddr addr;
786 struct device *kdev;
787 struct phy_device *phydev;
788 int i, ret;
789 unsigned int size;
790 char phy_id[MII_BUS_ID_SIZE + 3];
791 void *p;
792 u32 val;
793
794 priv = netdev_priv(dev);
795 kdev = &priv->pdev->dev;
796
797 if (priv->has_phy) {
798 /* connect to PHY */
799 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
800 priv->mac_id ? "1" : "0", priv->phy_id);
801
c061b18d 802 phydev = phy_connect(dev, phy_id, bcm_enet_adjust_phy_link, 0,
9b1fc55a
MB		 803 PHY_INTERFACE_MODE_MII);
804
805 if (IS_ERR(phydev)) {
806 dev_err(kdev, "could not attach to PHY\n");
807 return PTR_ERR(phydev);
808 }
809
810 /* mask with MAC supported features */
811 phydev->supported &= (SUPPORTED_10baseT_Half |
812 SUPPORTED_10baseT_Full |
813 SUPPORTED_100baseT_Half |
814 SUPPORTED_100baseT_Full |
815 SUPPORTED_Autoneg |
816 SUPPORTED_Pause |
817 SUPPORTED_MII);
818 phydev->advertising = phydev->supported;
819
820 if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
821 phydev->advertising |= SUPPORTED_Pause;
822 else
823 phydev->advertising &= ~SUPPORTED_Pause;
824
825 dev_info(kdev, "attached PHY at address %d [%s]\n",
826 phydev->addr, phydev->drv->name);
827
828 priv->old_link = 0;
829 priv->old_duplex = -1;
830 priv->old_pause = -1;
831 priv->phydev = phydev;
832 }
833
834 /* mask all interrupts and request them */
835 enet_writel(priv, 0, ENET_IRMASK_REG);
836 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
837 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
838
839 ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
840 if (ret)
841 goto out_phy_disconnect;
842
ab392d2d
JMC		 843 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, IRQF_DISABLED,
844 dev->name, dev);
9b1fc55a
MB		 845 if (ret)
846 goto out_freeirq;
847
848 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
849 IRQF_DISABLED, dev->name, dev);
850 if (ret)
851 goto out_freeirq_rx;
852
853 /* initialize perfect match registers */
854 for (i = 0; i < 4; i++) {
855 enet_writel(priv, 0, ENET_PML_REG(i));
856 enet_writel(priv, 0, ENET_PMH_REG(i));
857 }
858
859 /* write device mac address */
860 memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
861 bcm_enet_set_mac_address(dev, &addr);
862
863 /* allocate rx dma ring */
864 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
865 p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
866 if (!p) {
867 dev_err(kdev, "cannot allocate rx ring %u\n", size);
868 ret = -ENOMEM;
869 goto out_freeirq_tx;
870 }
871
872 memset(p, 0, size);
873 priv->rx_desc_alloc_size = size;
874 priv->rx_desc_cpu = p;
875
876 /* allocate tx dma ring */
877 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
878 p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
879 if (!p) {
880 dev_err(kdev, "cannot allocate tx ring\n");
881 ret = -ENOMEM;
882 goto out_free_rx_ring;
883 }
884
885 memset(p, 0, size);
886 priv->tx_desc_alloc_size = size;
887 priv->tx_desc_cpu = p;
888
889 priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
890 GFP_KERNEL);
891 if (!priv->tx_skb) {
892 dev_err(kdev, "cannot allocate rx skb queue\n");
893 ret = -ENOMEM;
894 goto out_free_tx_ring;
895 }
896
897 priv->tx_desc_count = priv->tx_ring_size;
898 priv->tx_dirty_desc = 0;
899 priv->tx_curr_desc = 0;
900 spin_lock_init(&priv->tx_lock);
901
902 /* init & fill rx ring with skbs */
903 priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
904 GFP_KERNEL);
905 if (!priv->rx_skb) {
906 dev_err(kdev, "cannot allocate rx skb queue\n");
907 ret = -ENOMEM;
908 goto out_free_tx_skb;
909 }
910
911 priv->rx_desc_count = 0;
912 priv->rx_dirty_desc = 0;
913 priv->rx_curr_desc = 0;
914
915 /* initialize flow control buffer allocation */
916 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
917 ENETDMA_BUFALLOC_REG(priv->rx_chan));
918
919 if (bcm_enet_refill_rx(dev)) {
920 dev_err(kdev, "cannot allocate rx skb queue\n");
921 ret = -ENOMEM;
922 goto out;
923 }
924
925 /* write rx & tx ring addresses */
926 enet_dma_writel(priv, priv->rx_desc_dma,
927 ENETDMA_RSTART_REG(priv->rx_chan));
928 enet_dma_writel(priv, priv->tx_desc_dma,
929 ENETDMA_RSTART_REG(priv->tx_chan));
930
931 /* clear remaining state ram for rx & tx channel */
932 enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->rx_chan));
933 enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->tx_chan));
934 enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->rx_chan));
935 enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->tx_chan));
936 enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->rx_chan));
937 enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->tx_chan));
938
939 /* set max rx/tx length */
940 enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
941 enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
942
943 /* set dma maximum burst len */
944 enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
945 ENETDMA_MAXBURST_REG(priv->rx_chan));
946 enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
947 ENETDMA_MAXBURST_REG(priv->tx_chan));
948
949 /* set correct transmit fifo watermark */
950 enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
951
952 /* set flow control low/high threshold to 1/3 / 2/3 */
953 val = priv->rx_ring_size / 3;
954 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
955 val = (priv->rx_ring_size * 2) / 3;
956 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
957
958 /* all set, enable mac and interrupts, start dma engine and
959 * kick rx dma channel */
960 wmb();
5e10d4a7
FF		 961 val = enet_readl(priv, ENET_CTL_REG);
962 val |= ENET_CTL_ENABLE_MASK;
963 enet_writel(priv, val, ENET_CTL_REG);
9b1fc55a
MB		 964 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
965 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
966 ENETDMA_CHANCFG_REG(priv->rx_chan));
967
968 /* watch "mib counters about to overflow" interrupt */
969 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
970 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
971
972 /* watch "packet transferred" interrupt in rx and tx */
973 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
974 ENETDMA_IR_REG(priv->rx_chan));
975 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
976 ENETDMA_IR_REG(priv->tx_chan));
977
978 /* make sure we enable napi before rx interrupt */
979 napi_enable(&priv->napi);
980
981 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
982 ENETDMA_IRMASK_REG(priv->rx_chan));
983 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
984 ENETDMA_IRMASK_REG(priv->tx_chan));
985
986 if (priv->has_phy)
987 phy_start(priv->phydev);
988 else
989 bcm_enet_adjust_link(dev);
990
991 netif_start_queue(dev);
992 return 0;
993
994out:
995 for (i = 0; i < priv->rx_ring_size; i++) {
996 struct bcm_enet_desc *desc;
997
998 if (!priv->rx_skb[i])
999 continue;
1000
1001 desc = &priv->rx_desc_cpu[i];
1002 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1003 DMA_FROM_DEVICE);
1004 kfree_skb(priv->rx_skb[i]);
1005 }
1006 kfree(priv->rx_skb);
1007
1008out_free_tx_skb:
1009 kfree(priv->tx_skb);
1010
1011out_free_tx_ring:
1012 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1013 priv->tx_desc_cpu, priv->tx_desc_dma);
1014
1015out_free_rx_ring:
1016 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1017 priv->rx_desc_cpu, priv->rx_desc_dma);
1018
1019out_freeirq_tx:
1020 free_irq(priv->irq_tx, dev);
1021
1022out_freeirq_rx:
1023 free_irq(priv->irq_rx, dev);
1024
1025out_freeirq:
1026 free_irq(dev->irq, dev);
1027
1028out_phy_disconnect:
1029 phy_disconnect(priv->phydev);
1030
1031 return ret;
1032}
1033
1034/*
1035 * disable mac
1036 */
1037static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
1038{
1039 int limit;
1040 u32 val;
1041
1042 val = enet_readl(priv, ENET_CTL_REG);
1043 val |= ENET_CTL_DISABLE_MASK;
1044 enet_writel(priv, val, ENET_CTL_REG);
1045
1046 limit = 1000;
1047 do {
1048 u32 val;
1049
1050 val = enet_readl(priv, ENET_CTL_REG);
1051 if (!(val & ENET_CTL_DISABLE_MASK))
1052 break;
1053 udelay(1);
1054 } while (limit--);
1055}
1056
1057/*
1058 * disable dma in given channel
1059 */
1060static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
1061{
1062 int limit;
1063
1064 enet_dma_writel(priv, 0, ENETDMA_CHANCFG_REG(chan));
1065
1066 limit = 1000;
1067 do {
1068 u32 val;
1069
1070 val = enet_dma_readl(priv, ENETDMA_CHANCFG_REG(chan));
1071 if (!(val & ENETDMA_CHANCFG_EN_MASK))
1072 break;
1073 udelay(1);
1074 } while (limit--);
1075}
1076
1077/*
1078 * stop callback
1079 */
1080static int bcm_enet_stop(struct net_device *dev)
1081{
1082 struct bcm_enet_priv *priv;
1083 struct device *kdev;
1084 int i;
1085
1086 priv = netdev_priv(dev);
1087 kdev = &priv->pdev->dev;
1088
1089 netif_stop_queue(dev);
1090 napi_disable(&priv->napi);
1091 if (priv->has_phy)
1092 phy_stop(priv->phydev);
1093 del_timer_sync(&priv->rx_timeout);
1094
1095 /* mask all interrupts */
1096 enet_writel(priv, 0, ENET_IRMASK_REG);
1097 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
1098 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
1099
1100 /* make sure no mib update is scheduled */
23f333a2 1101 cancel_work_sync(&priv->mib_update_task);
9b1fc55a
MB		 1102
1103 /* disable dma & mac */
1104 bcm_enet_disable_dma(priv, priv->tx_chan);
1105 bcm_enet_disable_dma(priv, priv->rx_chan);
1106 bcm_enet_disable_mac(priv);
1107
1108 /* force reclaim of all tx buffers */
1109 bcm_enet_tx_reclaim(dev, 1);
1110
1111 /* free the rx skb ring */
1112 for (i = 0; i < priv->rx_ring_size; i++) {
1113 struct bcm_enet_desc *desc;
1114
1115 if (!priv->rx_skb[i])
1116 continue;
1117
1118 desc = &priv->rx_desc_cpu[i];
1119 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1120 DMA_FROM_DEVICE);
1121 kfree_skb(priv->rx_skb[i]);
1122 }
1123
1124 /* free remaining allocated memory */
1125 kfree(priv->rx_skb);
1126 kfree(priv->tx_skb);
1127 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1128 priv->rx_desc_cpu, priv->rx_desc_dma);
1129 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1130 priv->tx_desc_cpu, priv->tx_desc_dma);
1131 free_irq(priv->irq_tx, dev);
1132 free_irq(priv->irq_rx, dev);
1133 free_irq(dev->irq, dev);
1134
1135 /* release phy */
1136 if (priv->has_phy) {
1137 phy_disconnect(priv->phydev);
1138 priv->phydev = NULL;
1139 }
1140
1141 return 0;
1142}
1143
9b1fc55a
MB		 1144/*
1145 * ethtool callbacks
1146 */
1147struct bcm_enet_stats {
1148 char stat_string[ETH_GSTRING_LEN];
1149 int sizeof_stat;
1150 int stat_offset;
1151 int mib_reg;
1152};
1153
1154#define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m), \
1155 offsetof(struct bcm_enet_priv, m)
c32d83c0
ED		 1156#define DEV_STAT(m) sizeof(((struct net_device_stats *)0)->m), \
1157 offsetof(struct net_device_stats, m)
9b1fc55a
MB		 1158
1159static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
c32d83c0
ED		 1160 { "rx_packets", DEV_STAT(rx_packets), -1 },
1161 { "tx_packets", DEV_STAT(tx_packets), -1 },
1162 { "rx_bytes", DEV_STAT(rx_bytes), -1 },
1163 { "tx_bytes", DEV_STAT(tx_bytes), -1 },
1164 { "rx_errors", DEV_STAT(rx_errors), -1 },
1165 { "tx_errors", DEV_STAT(tx_errors), -1 },
1166 { "rx_dropped", DEV_STAT(rx_dropped), -1 },
1167 { "tx_dropped", DEV_STAT(tx_dropped), -1 },
9b1fc55a
MB		 1168
1169 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
1170 { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
1171 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
1172 { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
1173 { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
1174 { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
1175 { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
1176 { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
1177 { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
1178 { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
1179 { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
1180 { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
1181 { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
1182 { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
1183 { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
1184 { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
1185 { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
1186 { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
1187 { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
1188 { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
1189 { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
1190
1191 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
1192 { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
1193 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
1194 { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
1195 { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
1196 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
1197 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
1198 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
1199 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
1200 { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
1201 { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
1202 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
1203 { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
1204 { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
1205 { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
1206 { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
1207 { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
1208 { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
1209 { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
1210 { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
1211 { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
1212 { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
1213
1214};
1215
1216#define BCM_ENET_STATS_LEN \
1217 (sizeof(bcm_enet_gstrings_stats) / sizeof(struct bcm_enet_stats))
1218
1219static const u32 unused_mib_regs[] = {
1220 ETH_MIB_TX_ALL_OCTETS,
1221 ETH_MIB_TX_ALL_PKTS,
1222 ETH_MIB_RX_ALL_OCTETS,
1223 ETH_MIB_RX_ALL_PKTS,
1224};
1225
1226
1227static void bcm_enet_get_drvinfo(struct net_device *netdev,
1228 struct ethtool_drvinfo *drvinfo)
1229{
1230 strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
1231 strncpy(drvinfo->version, bcm_enet_driver_version, 32);
1232 strncpy(drvinfo->fw_version, "N/A", 32);
1233 strncpy(drvinfo->bus_info, "bcm63xx", 32);
1234 drvinfo->n_stats = BCM_ENET_STATS_LEN;
1235}
1236
a3f92eea
FF		 1237static int bcm_enet_get_sset_count(struct net_device *netdev,
1238 int string_set)
9b1fc55a 1239{
a3f92eea
FF		 1240 switch (string_set) {
1241 case ETH_SS_STATS:
1242 return BCM_ENET_STATS_LEN;
1243 default:
1244 return -EINVAL;
1245 }
9b1fc55a
MB		 1246}
1247
1248static void bcm_enet_get_strings(struct net_device *netdev,
1249 u32 stringset, u8 *data)
1250{
1251 int i;
1252
1253 switch (stringset) {
1254 case ETH_SS_STATS:
1255 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1256 memcpy(data + i * ETH_GSTRING_LEN,
1257 bcm_enet_gstrings_stats[i].stat_string,
1258 ETH_GSTRING_LEN);
1259 }
1260 break;
1261 }
1262}
1263
1264static void update_mib_counters(struct bcm_enet_priv *priv)
1265{
1266 int i;
1267
1268 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1269 const struct bcm_enet_stats *s;
1270 u32 val;
1271 char *p;
1272
1273 s = &bcm_enet_gstrings_stats[i];
1274 if (s->mib_reg == -1)
1275 continue;
1276
1277 val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
1278 p = (char *)priv + s->stat_offset;
1279
1280 if (s->sizeof_stat == sizeof(u64))
1281 *(u64 *)p += val;
1282 else
1283 *(u32 *)p += val;
1284 }
1285
1286 /* also empty unused mib counters to make sure mib counter
1287 * overflow interrupt is cleared */
1288 for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
1289 (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
1290}
1291
1292static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
1293{
1294 struct bcm_enet_priv *priv;
1295
1296 priv = container_of(t, struct bcm_enet_priv, mib_update_task);
1297 mutex_lock(&priv->mib_update_lock);
1298 update_mib_counters(priv);
1299 mutex_unlock(&priv->mib_update_lock);
1300
1301 /* reenable mib interrupt */
1302 if (netif_running(priv->net_dev))
1303 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1304}
1305
1306static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
1307 struct ethtool_stats *stats,
1308 u64 *data)
1309{
1310 struct bcm_enet_priv *priv;
1311 int i;
1312
1313 priv = netdev_priv(netdev);
1314
1315 mutex_lock(&priv->mib_update_lock);
1316 update_mib_counters(priv);
1317
1318 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1319 const struct bcm_enet_stats *s;
1320 char *p;
1321
1322 s = &bcm_enet_gstrings_stats[i];
c32d83c0
ED		 1323 if (s->mib_reg == -1)
1324 p = (char *)&netdev->stats;
1325 else
1326 p = (char *)priv;
1327 p += s->stat_offset;
9b1fc55a
MB		 1328 data[i] = (s->sizeof_stat == sizeof(u64)) ?
1329 *(u64 *)p : *(u32 *)p;
1330 }
1331 mutex_unlock(&priv->mib_update_lock);
1332}
1333
1334static int bcm_enet_get_settings(struct net_device *dev,
1335 struct ethtool_cmd *cmd)
1336{
1337 struct bcm_enet_priv *priv;
1338
1339 priv = netdev_priv(dev);
1340
1341 cmd->maxrxpkt = 0;
1342 cmd->maxtxpkt = 0;
1343
1344 if (priv->has_phy) {
1345 if (!priv->phydev)
1346 return -ENODEV;
1347 return phy_ethtool_gset(priv->phydev, cmd);
1348 } else {
1349 cmd->autoneg = 0;
70739497
DD		 1350 ethtool_cmd_speed_set(cmd, ((priv->force_speed_100)
1351 ? SPEED_100 : SPEED_10));
9b1fc55a
MB		 1352 cmd->duplex = (priv->force_duplex_full) ?
1353 DUPLEX_FULL : DUPLEX_HALF;
1354 cmd->supported = ADVERTISED_10baseT_Half |
1355 ADVERTISED_10baseT_Full |
1356 ADVERTISED_100baseT_Half |
1357 ADVERTISED_100baseT_Full;
1358 cmd->advertising = 0;
1359 cmd->port = PORT_MII;
1360 cmd->transceiver = XCVR_EXTERNAL;
1361 }
1362 return 0;
1363}
1364
1365static int bcm_enet_set_settings(struct net_device *dev,
1366 struct ethtool_cmd *cmd)
1367{
1368 struct bcm_enet_priv *priv;
1369
1370 priv = netdev_priv(dev);
1371 if (priv->has_phy) {
1372 if (!priv->phydev)
1373 return -ENODEV;
1374 return phy_ethtool_sset(priv->phydev, cmd);
1375 } else {
1376
1377 if (cmd->autoneg ||
1378 (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
1379 cmd->port != PORT_MII)
1380 return -EINVAL;
1381
1382 priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
1383 priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;
1384
1385 if (netif_running(dev))
1386 bcm_enet_adjust_link(dev);
1387 return 0;
1388 }
1389}
1390
1391static void bcm_enet_get_ringparam(struct net_device *dev,
1392 struct ethtool_ringparam *ering)
1393{
1394 struct bcm_enet_priv *priv;
1395
1396 priv = netdev_priv(dev);
1397
1398 /* rx/tx ring is actually only limited by memory */
1399 ering->rx_max_pending = 8192;
1400 ering->tx_max_pending = 8192;
1401 ering->rx_mini_max_pending = 0;
1402 ering->rx_jumbo_max_pending = 0;
1403 ering->rx_pending = priv->rx_ring_size;
1404 ering->tx_pending = priv->tx_ring_size;
1405}
1406
1407static int bcm_enet_set_ringparam(struct net_device *dev,
1408 struct ethtool_ringparam *ering)
1409{
1410 struct bcm_enet_priv *priv;
1411 int was_running;
1412
1413 priv = netdev_priv(dev);
1414
1415 was_running = 0;
1416 if (netif_running(dev)) {
1417 bcm_enet_stop(dev);
1418 was_running = 1;
1419 }
1420
1421 priv->rx_ring_size = ering->rx_pending;
1422 priv->tx_ring_size = ering->tx_pending;
1423
1424 if (was_running) {
1425 int err;
1426
1427 err = bcm_enet_open(dev);
1428 if (err)
1429 dev_close(dev);
1430 else
1431 bcm_enet_set_multicast_list(dev);
1432 }
1433 return 0;
1434}
1435
1436static void bcm_enet_get_pauseparam(struct net_device *dev,
1437 struct ethtool_pauseparam *ecmd)
1438{
1439 struct bcm_enet_priv *priv;
1440
1441 priv = netdev_priv(dev);
1442 ecmd->autoneg = priv->pause_auto;
1443 ecmd->rx_pause = priv->pause_rx;
1444 ecmd->tx_pause = priv->pause_tx;
1445}
1446
1447static int bcm_enet_set_pauseparam(struct net_device *dev,
1448 struct ethtool_pauseparam *ecmd)
1449{
1450 struct bcm_enet_priv *priv;
1451
1452 priv = netdev_priv(dev);
1453
1454 if (priv->has_phy) {
1455 if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
1456 /* asymetric pause mode not supported,
1457 * actually possible but integrated PHY has RO
1458 * asym_pause bit */
1459 return -EINVAL;
1460 }
1461 } else {
1462 /* no pause autoneg on direct mii connection */
1463 if (ecmd->autoneg)
1464 return -EINVAL;
1465 }
1466
1467 priv->pause_auto = ecmd->autoneg;
1468 priv->pause_rx = ecmd->rx_pause;
1469 priv->pause_tx = ecmd->tx_pause;
1470
1471 return 0;
1472}
1473
1474static struct ethtool_ops bcm_enet_ethtool_ops = {
1475 .get_strings = bcm_enet_get_strings,
a3f92eea 1476 .get_sset_count = bcm_enet_get_sset_count,
9b1fc55a
MB		 1477 .get_ethtool_stats = bcm_enet_get_ethtool_stats,
1478 .get_settings = bcm_enet_get_settings,
1479 .set_settings = bcm_enet_set_settings,
1480 .get_drvinfo = bcm_enet_get_drvinfo,
1481 .get_link = ethtool_op_get_link,
1482 .get_ringparam = bcm_enet_get_ringparam,
1483 .set_ringparam = bcm_enet_set_ringparam,
1484 .get_pauseparam = bcm_enet_get_pauseparam,
1485 .set_pauseparam = bcm_enet_set_pauseparam,
1486};
1487
1488static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1489{
1490 struct bcm_enet_priv *priv;
1491
1492 priv = netdev_priv(dev);
1493 if (priv->has_phy) {
1494 if (!priv->phydev)
1495 return -ENODEV;
28b04113 1496 return phy_mii_ioctl(priv->phydev, rq, cmd);
9b1fc55a
MB		 1497 } else {
1498 struct mii_if_info mii;
1499
1500 mii.dev = dev;
1501 mii.mdio_read = bcm_enet_mdio_read_mii;
1502 mii.mdio_write = bcm_enet_mdio_write_mii;
1503 mii.phy_id = 0;
1504 mii.phy_id_mask = 0x3f;
1505 mii.reg_num_mask = 0x1f;
1506 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
1507 }
1508}
1509
1510/*
1511 * calculate actual hardware mtu
1512 */
1513static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
1514{
1515 int actual_mtu;
1516
1517 actual_mtu = mtu;
1518
1519 /* add ethernet header + vlan tag size */
1520 actual_mtu += VLAN_ETH_HLEN;
1521
1522 if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
1523 return -EINVAL;
1524
1525 /*
1526 * setup maximum size before we get overflow mark in
1527 * descriptor, note that this will not prevent reception of
1528 * big frames, they will be split into multiple buffers
1529 * anyway
1530 */
1531 priv->hw_mtu = actual_mtu;
1532
1533 /*
1534 * align rx buffer size to dma burst len, account FCS since
1535 * it's appended
1536 */
1537 priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
1538 BCMENET_DMA_MAXBURST * 4);
1539 return 0;
1540}
1541
1542/*
1543 * adjust mtu, can't be called while device is running
1544 */
1545static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
1546{
1547 int ret;
1548
1549 if (netif_running(dev))
1550 return -EBUSY;
1551
1552 ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
1553 if (ret)
1554 return ret;
1555 dev->mtu = new_mtu;
1556 return 0;
1557}
1558
1559/*
1560 * preinit hardware to allow mii operation while device is down
1561 */
1562static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
1563{
1564 u32 val;
1565 int limit;
1566
1567 /* make sure mac is disabled */
1568 bcm_enet_disable_mac(priv);
1569
1570 /* soft reset mac */
1571 val = ENET_CTL_SRESET_MASK;
1572 enet_writel(priv, val, ENET_CTL_REG);
1573 wmb();
1574
1575 limit = 1000;
1576 do {
1577 val = enet_readl(priv, ENET_CTL_REG);
1578 if (!(val & ENET_CTL_SRESET_MASK))
1579 break;
1580 udelay(1);
1581 } while (limit--);
1582
1583 /* select correct mii interface */
1584 val = enet_readl(priv, ENET_CTL_REG);
1585 if (priv->use_external_mii)
1586 val |= ENET_CTL_EPHYSEL_MASK;
1587 else
1588 val &= ~ENET_CTL_EPHYSEL_MASK;
1589 enet_writel(priv, val, ENET_CTL_REG);
1590
1591 /* turn on mdc clock */
1592 enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
1593 ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
1594
1595 /* set mib counters to self-clear when read */
1596 val = enet_readl(priv, ENET_MIBCTL_REG);
1597 val |= ENET_MIBCTL_RDCLEAR_MASK;
1598 enet_writel(priv, val, ENET_MIBCTL_REG);
1599}
1600
1601static const struct net_device_ops bcm_enet_ops = {
1602 .ndo_open = bcm_enet_open,
1603 .ndo_stop = bcm_enet_stop,
1604 .ndo_start_xmit = bcm_enet_start_xmit,
9b1fc55a
MB		 1605 .ndo_set_mac_address = bcm_enet_set_mac_address,
1606 .ndo_set_multicast_list = bcm_enet_set_multicast_list,
1607 .ndo_do_ioctl = bcm_enet_ioctl,
1608 .ndo_change_mtu = bcm_enet_change_mtu,
1609#ifdef CONFIG_NET_POLL_CONTROLLER
1610 .ndo_poll_controller = bcm_enet_netpoll,
1611#endif
1612};
1613
1614/*
1615 * allocate netdevice, request register memory and register device.
1616 */
1617static int __devinit bcm_enet_probe(struct platform_device *pdev)
1618{
1619 struct bcm_enet_priv *priv;
1620 struct net_device *dev;
1621 struct bcm63xx_enet_platform_data *pd;
1622 struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
1623 struct mii_bus *bus;
1624 const char *clk_name;
1625 unsigned int iomem_size;
1626 int i, ret;
1627
1628 /* stop if shared driver failed, assume driver->probe will be
1629 * called in the same order we register devices (correct ?) */
1630 if (!bcm_enet_shared_base)
1631 return -ENODEV;
1632
1633 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1634 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1635 res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1636 res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
1637 if (!res_mem || !res_irq || !res_irq_rx || !res_irq_tx)
1638 return -ENODEV;
1639
1640 ret = 0;
1641 dev = alloc_etherdev(sizeof(*priv));
1642 if (!dev)
1643 return -ENOMEM;
1644 priv = netdev_priv(dev);
9b1fc55a
MB		 1645
1646 ret = compute_hw_mtu(priv, dev->mtu);
1647 if (ret)
1648 goto out;
1649
28f65c11 1650 iomem_size = resource_size(res_mem);
9b1fc55a
MB		 1651 if (!request_mem_region(res_mem->start, iomem_size, "bcm63xx_enet")) {
1652 ret = -EBUSY;
1653 goto out;
1654 }
1655
1656 priv->base = ioremap(res_mem->start, iomem_size);
1657 if (priv->base == NULL) {
1658 ret = -ENOMEM;
1659 goto out_release_mem;
1660 }
1661 dev->irq = priv->irq = res_irq->start;
1662 priv->irq_rx = res_irq_rx->start;
1663 priv->irq_tx = res_irq_tx->start;
1664 priv->mac_id = pdev->id;
1665
1666 /* get rx & tx dma channel id for this mac */
1667 if (priv->mac_id == 0) {
1668 priv->rx_chan = 0;
1669 priv->tx_chan = 1;
1670 clk_name = "enet0";
1671 } else {
1672 priv->rx_chan = 2;
1673 priv->tx_chan = 3;
1674 clk_name = "enet1";
1675 }
1676
1677 priv->mac_clk = clk_get(&pdev->dev, clk_name);
1678 if (IS_ERR(priv->mac_clk)) {
1679 ret = PTR_ERR(priv->mac_clk);
1680 goto out_unmap;
1681 }
1682 clk_enable(priv->mac_clk);
1683
1684 /* initialize default and fetch platform data */
1685 priv->rx_ring_size = BCMENET_DEF_RX_DESC;
1686 priv->tx_ring_size = BCMENET_DEF_TX_DESC;
1687
1688 pd = pdev->dev.platform_data;
1689 if (pd) {
1690 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
1691 priv->has_phy = pd->has_phy;
1692 priv->phy_id = pd->phy_id;
1693 priv->has_phy_interrupt = pd->has_phy_interrupt;
1694 priv->phy_interrupt = pd->phy_interrupt;
1695 priv->use_external_mii = !pd->use_internal_phy;
1696 priv->pause_auto = pd->pause_auto;
1697 priv->pause_rx = pd->pause_rx;
1698 priv->pause_tx = pd->pause_tx;
1699 priv->force_duplex_full = pd->force_duplex_full;
1700 priv->force_speed_100 = pd->force_speed_100;
1701 }
1702
1703 if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
1704 /* using internal PHY, enable clock */
1705 priv->phy_clk = clk_get(&pdev->dev, "ephy");
1706 if (IS_ERR(priv->phy_clk)) {
1707 ret = PTR_ERR(priv->phy_clk);
1708 priv->phy_clk = NULL;
1709 goto out_put_clk_mac;
1710 }
1711 clk_enable(priv->phy_clk);
1712 }
1713
1714 /* do minimal hardware init to be able to probe mii bus */
1715 bcm_enet_hw_preinit(priv);
1716
1717 /* MII bus registration */
1718 if (priv->has_phy) {
1719
1720 priv->mii_bus = mdiobus_alloc();
1721 if (!priv->mii_bus) {
1722 ret = -ENOMEM;
1723 goto out_uninit_hw;
1724 }
1725
1726 bus = priv->mii_bus;
1727 bus->name = "bcm63xx_enet MII bus";
1728 bus->parent = &pdev->dev;
1729 bus->priv = priv;
1730 bus->read = bcm_enet_mdio_read_phylib;
1731 bus->write = bcm_enet_mdio_write_phylib;
1732 sprintf(bus->id, "%d", priv->mac_id);
1733
1734 /* only probe bus where we think the PHY is, because
1735 * the mdio read operation return 0 instead of 0xffff
1736 * if a slave is not present on hw */
1737 bus->phy_mask = ~(1 << priv->phy_id);
1738
1739 bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
1740 if (!bus->irq) {
1741 ret = -ENOMEM;
1742 goto out_free_mdio;
1743 }
1744
1745 if (priv->has_phy_interrupt)
1746 bus->irq[priv->phy_id] = priv->phy_interrupt;
1747 else
1748 bus->irq[priv->phy_id] = PHY_POLL;
1749
1750 ret = mdiobus_register(bus);
1751 if (ret) {
1752 dev_err(&pdev->dev, "unable to register mdio bus\n");
1753 goto out_free_mdio;
1754 }
1755 } else {
1756
1757 /* run platform code to initialize PHY device */
1758 if (pd->mii_config &&
1759 pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
1760 bcm_enet_mdio_write_mii)) {
1761 dev_err(&pdev->dev, "unable to configure mdio bus\n");
1762 goto out_uninit_hw;
1763 }
1764 }
1765
1766 spin_lock_init(&priv->rx_lock);
1767
1768 /* init rx timeout (used for oom) */
1769 init_timer(&priv->rx_timeout);
1770 priv->rx_timeout.function = bcm_enet_refill_rx_timer;
1771 priv->rx_timeout.data = (unsigned long)dev;
1772
1773 /* init the mib update lock&work */
1774 mutex_init(&priv->mib_update_lock);
1775 INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
1776
1777 /* zero mib counters */
1778 for (i = 0; i < ENET_MIB_REG_COUNT; i++)
1779 enet_writel(priv, 0, ENET_MIB_REG(i));
1780
1781 /* register netdevice */
1782 dev->netdev_ops = &bcm_enet_ops;
1783 netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
1784
1785 SET_ETHTOOL_OPS(dev, &bcm_enet_ethtool_ops);
1786 SET_NETDEV_DEV(dev, &pdev->dev);
1787
1788 ret = register_netdev(dev);
1789 if (ret)
1790 goto out_unregister_mdio;
1791
1792 netif_carrier_off(dev);
1793 platform_set_drvdata(pdev, dev);
1794 priv->pdev = pdev;
1795 priv->net_dev = dev;
1796
1797 return 0;
1798
1799out_unregister_mdio:
1800 if (priv->mii_bus) {
1801 mdiobus_unregister(priv->mii_bus);
1802 kfree(priv->mii_bus->irq);
1803 }
1804
1805out_free_mdio:
1806 if (priv->mii_bus)
1807 mdiobus_free(priv->mii_bus);
1808
1809out_uninit_hw:
1810 /* turn off mdc clock */
1811 enet_writel(priv, 0, ENET_MIISC_REG);
1812 if (priv->phy_clk) {
1813 clk_disable(priv->phy_clk);
1814 clk_put(priv->phy_clk);
1815 }
1816
1817out_put_clk_mac:
1818 clk_disable(priv->mac_clk);
1819 clk_put(priv->mac_clk);
1820
1821out_unmap:
1822 iounmap(priv->base);
1823
1824out_release_mem:
1825 release_mem_region(res_mem->start, iomem_size);
1826out:
1827 free_netdev(dev);
1828 return ret;
1829}
1830
1831
1832/*
1833 * exit func, stops hardware and unregisters netdevice
1834 */
1835static int __devexit bcm_enet_remove(struct platform_device *pdev)
1836{
1837 struct bcm_enet_priv *priv;
1838 struct net_device *dev;
1839 struct resource *res;
1840
1841 /* stop netdevice */
1842 dev = platform_get_drvdata(pdev);
1843 priv = netdev_priv(dev);
1844 unregister_netdev(dev);
1845
1846 /* turn off mdc clock */
1847 enet_writel(priv, 0, ENET_MIISC_REG);
1848
1849 if (priv->has_phy) {
1850 mdiobus_unregister(priv->mii_bus);
1851 kfree(priv->mii_bus->irq);
1852 mdiobus_free(priv->mii_bus);
1853 } else {
1854 struct bcm63xx_enet_platform_data *pd;
1855
1856 pd = pdev->dev.platform_data;
1857 if (pd && pd->mii_config)
1858 pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
1859 bcm_enet_mdio_write_mii);
1860 }
1861
1862 /* release device resources */
1863 iounmap(priv->base);
1864 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
28f65c11 1865 release_mem_region(res->start, resource_size(res));
9b1fc55a
MB		 1866
1867 /* disable hw block clocks */
1868 if (priv->phy_clk) {
1869 clk_disable(priv->phy_clk);
1870 clk_put(priv->phy_clk);
1871 }
1872 clk_disable(priv->mac_clk);
1873 clk_put(priv->mac_clk);
1874
1875 platform_set_drvdata(pdev, NULL);
1876 free_netdev(dev);
1877 return 0;
1878}
1879
1880struct platform_driver bcm63xx_enet_driver = {
1881 .probe = bcm_enet_probe,
1882 .remove = __devexit_p(bcm_enet_remove),
1883 .driver = {
1884 .name = "bcm63xx_enet",
1885 .owner = THIS_MODULE,
1886 },
1887};
1888
1889/*
1890 * reserve & remap memory space shared between all macs
1891 */
1892static int __devinit bcm_enet_shared_probe(struct platform_device *pdev)
1893{
1894 struct resource *res;
1895 unsigned int iomem_size;
1896
1897 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1898 if (!res)
1899 return -ENODEV;
1900
28f65c11 1901 iomem_size = resource_size(res);
9b1fc55a
MB		 1902 if (!request_mem_region(res->start, iomem_size, "bcm63xx_enet_dma"))
1903 return -EBUSY;
1904
1905 bcm_enet_shared_base = ioremap(res->start, iomem_size);
1906 if (!bcm_enet_shared_base) {
1907 release_mem_region(res->start, iomem_size);
1908 return -ENOMEM;
1909 }
1910 return 0;
1911}
1912
1913static int __devexit bcm_enet_shared_remove(struct platform_device *pdev)
1914{
1915 struct resource *res;
1916
1917 iounmap(bcm_enet_shared_base);
1918 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
28f65c11 1919 release_mem_region(res->start, resource_size(res));
9b1fc55a
MB		 1920 return 0;
1921}
1922
1923/*
1924 * this "shared" driver is needed because both macs share a single
1925 * address space
1926 */
1927struct platform_driver bcm63xx_enet_shared_driver = {
1928 .probe = bcm_enet_shared_probe,
1929 .remove = __devexit_p(bcm_enet_shared_remove),
1930 .driver = {
1931 .name = "bcm63xx_enet_shared",
1932 .owner = THIS_MODULE,
1933 },
1934};
1935
1936/*
1937 * entry point
1938 */
1939static int __init bcm_enet_init(void)
1940{
1941 int ret;
1942
1943 ret = platform_driver_register(&bcm63xx_enet_shared_driver);
1944 if (ret)
1945 return ret;
1946
1947 ret = platform_driver_register(&bcm63xx_enet_driver);
1948 if (ret)
1949 platform_driver_unregister(&bcm63xx_enet_shared_driver);
1950
1951 return ret;
1952}
1953
1954static void __exit bcm_enet_exit(void)
1955{
1956 platform_driver_unregister(&bcm63xx_enet_driver);
1957 platform_driver_unregister(&bcm63xx_enet_shared_driver);
1958}
1959
1960
1961module_init(bcm_enet_init);
1962module_exit(bcm_enet_exit);
1963
1964MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
1965MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
1966MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)