pasemi_mac: basic error checking
[linux-2.6] / drivers / net / pasemi_mac.c
1 /*
2  * Copyright (C) 2006-2007 PA Semi, Inc
3  *
4  * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs
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 version 2 as
8  * published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
18  */
19
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/pci.h>
23 #include <linux/interrupt.h>
24 #include <linux/dmaengine.h>
25 #include <linux/delay.h>
26 #include <linux/netdevice.h>
27 #include <linux/etherdevice.h>
28 #include <asm/dma-mapping.h>
29 #include <linux/in.h>
30 #include <linux/skbuff.h>
31
32 #include <linux/ip.h>
33 #include <linux/tcp.h>
34 #include <net/checksum.h>
35
36 #include <asm/irq.h>
37
38 #include "pasemi_mac.h"
39
40
41 /* TODO list
42  *
43  * - Get rid of pci_{read,write}_config(), map registers with ioremap
44  *   for performance
45  * - PHY support
46  * - Multicast support
47  * - Large MTU support
48  * - Other performance improvements
49  */
50
51
52 /* Must be a power of two */
53 #define RX_RING_SIZE 512
54 #define TX_RING_SIZE 512
55
56 #define DEFAULT_MSG_ENABLE        \
57         (NETIF_MSG_DRV          | \
58          NETIF_MSG_PROBE        | \
59          NETIF_MSG_LINK         | \
60          NETIF_MSG_TIMER        | \
61          NETIF_MSG_IFDOWN       | \
62          NETIF_MSG_IFUP         | \
63          NETIF_MSG_RX_ERR       | \
64          NETIF_MSG_TX_ERR)
65
66 #define TX_DESC(mac, num)       ((mac)->tx->desc[(num) & (TX_RING_SIZE-1)])
67 #define TX_DESC_INFO(mac, num)  ((mac)->tx->desc_info[(num) & (TX_RING_SIZE-1)])
68 #define RX_DESC(mac, num)       ((mac)->rx->desc[(num) & (RX_RING_SIZE-1)])
69 #define RX_DESC_INFO(mac, num)  ((mac)->rx->desc_info[(num) & (RX_RING_SIZE-1)])
70 #define RX_BUFF(mac, num)       ((mac)->rx->buffers[(num) & (RX_RING_SIZE-1)])
71
72 #define RING_USED(ring)         (((ring)->next_to_fill - (ring)->next_to_clean) \
73                                  & ((ring)->size - 1))
74 #define RING_AVAIL(ring)        ((ring->size) - RING_USED(ring))
75
76 #define BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
77
78 MODULE_LICENSE("GPL");
79 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
80 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
81
82 static int debug = -1;  /* -1 == use DEFAULT_MSG_ENABLE as value */
83 module_param(debug, int, 0);
84 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
85
86 static struct pasdma_status *dma_status;
87
88 static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg,
89                           unsigned int val)
90 {
91         out_le32(mac->iob_regs+reg, val);
92 }
93
94 static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg)
95 {
96         return in_le32(mac->regs+reg);
97 }
98
99 static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg,
100                           unsigned int val)
101 {
102         out_le32(mac->regs+reg, val);
103 }
104
105 static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg)
106 {
107         return in_le32(mac->dma_regs+reg);
108 }
109
110 static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg,
111                           unsigned int val)
112 {
113         out_le32(mac->dma_regs+reg, val);
114 }
115
116 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
117 {
118         struct pci_dev *pdev = mac->pdev;
119         struct device_node *dn = pci_device_to_OF_node(pdev);
120         int len;
121         const u8 *maddr;
122         u8 addr[6];
123
124         if (!dn) {
125                 dev_dbg(&pdev->dev,
126                           "No device node for mac, not configuring\n");
127                 return -ENOENT;
128         }
129
130         maddr = of_get_property(dn, "local-mac-address", &len);
131
132         if (maddr && len == 6) {
133                 memcpy(mac->mac_addr, maddr, 6);
134                 return 0;
135         }
136
137         /* Some old versions of firmware mistakenly uses mac-address
138          * (and as a string) instead of a byte array in local-mac-address.
139          */
140
141         if (maddr == NULL)
142                 maddr = of_get_property(dn, "mac-address", NULL);
143
144         if (maddr == NULL) {
145                 dev_warn(&pdev->dev,
146                          "no mac address in device tree, not configuring\n");
147                 return -ENOENT;
148         }
149
150
151         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
152                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
153                 dev_warn(&pdev->dev,
154                          "can't parse mac address, not configuring\n");
155                 return -EINVAL;
156         }
157
158         memcpy(mac->mac_addr, addr, 6);
159
160         return 0;
161 }
162
163 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
164 {
165         struct pasemi_mac_rxring *ring;
166         struct pasemi_mac *mac = netdev_priv(dev);
167         int chan_id = mac->dma_rxch;
168
169         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
170
171         if (!ring)
172                 goto out_ring;
173
174         spin_lock_init(&ring->lock);
175
176         ring->size = RX_RING_SIZE;
177         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
178                                   RX_RING_SIZE, GFP_KERNEL);
179
180         if (!ring->desc_info)
181                 goto out_desc_info;
182
183         /* Allocate descriptors */
184         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
185                                         RX_RING_SIZE *
186                                         sizeof(struct pas_dma_xct_descr),
187                                         &ring->dma, GFP_KERNEL);
188
189         if (!ring->desc)
190                 goto out_desc;
191
192         memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
193
194         ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
195                                            RX_RING_SIZE * sizeof(u64),
196                                            &ring->buf_dma, GFP_KERNEL);
197         if (!ring->buffers)
198                 goto out_buffers;
199
200         memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
201
202         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
203
204         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id),
205                            PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
206                            PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
207
208         write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id),
209                            PAS_DMA_RXCHAN_CFG_HBU(2));
210
211         write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
212                            PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
213
214         write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if),
215                            PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
216                            PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
217
218         write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
219                            PAS_DMA_RXINT_CFG_DHL(2));
220
221         ring->next_to_fill = 0;
222         ring->next_to_clean = 0;
223
224         snprintf(ring->irq_name, sizeof(ring->irq_name),
225                  "%s rx", dev->name);
226         mac->rx = ring;
227
228         return 0;
229
230 out_buffers:
231         dma_free_coherent(&mac->dma_pdev->dev,
232                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
233                           mac->rx->desc, mac->rx->dma);
234 out_desc:
235         kfree(ring->desc_info);
236 out_desc_info:
237         kfree(ring);
238 out_ring:
239         return -ENOMEM;
240 }
241
242
243 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
244 {
245         struct pasemi_mac *mac = netdev_priv(dev);
246         u32 val;
247         int chan_id = mac->dma_txch;
248         struct pasemi_mac_txring *ring;
249
250         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
251         if (!ring)
252                 goto out_ring;
253
254         spin_lock_init(&ring->lock);
255
256         ring->size = TX_RING_SIZE;
257         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
258                                   TX_RING_SIZE, GFP_KERNEL);
259         if (!ring->desc_info)
260                 goto out_desc_info;
261
262         /* Allocate descriptors */
263         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
264                                         TX_RING_SIZE *
265                                         sizeof(struct pas_dma_xct_descr),
266                                         &ring->dma, GFP_KERNEL);
267         if (!ring->desc)
268                 goto out_desc;
269
270         memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
271
272         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
273                            PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
274         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
275         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
276
277         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
278
279         write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id),
280                            PAS_DMA_TXCHAN_CFG_TY_IFACE |
281                            PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
282                            PAS_DMA_TXCHAN_CFG_UP |
283                            PAS_DMA_TXCHAN_CFG_WT(2));
284
285         ring->next_to_fill = 0;
286         ring->next_to_clean = 0;
287
288         snprintf(ring->irq_name, sizeof(ring->irq_name),
289                  "%s tx", dev->name);
290         mac->tx = ring;
291
292         return 0;
293
294 out_desc:
295         kfree(ring->desc_info);
296 out_desc_info:
297         kfree(ring);
298 out_ring:
299         return -ENOMEM;
300 }
301
302 static void pasemi_mac_free_tx_resources(struct net_device *dev)
303 {
304         struct pasemi_mac *mac = netdev_priv(dev);
305         unsigned int i;
306         struct pasemi_mac_buffer *info;
307         struct pas_dma_xct_descr *dp;
308
309         for (i = 0; i < TX_RING_SIZE; i++) {
310                 info = &TX_DESC_INFO(mac, i);
311                 dp = &TX_DESC(mac, i);
312                 if (info->dma) {
313                         if (info->skb) {
314                                 pci_unmap_single(mac->dma_pdev,
315                                                  info->dma,
316                                                  info->skb->len,
317                                                  PCI_DMA_TODEVICE);
318                                 dev_kfree_skb_any(info->skb);
319                         }
320                         info->dma = 0;
321                         info->skb = NULL;
322                         dp->mactx = 0;
323                         dp->ptr = 0;
324                 }
325         }
326
327         dma_free_coherent(&mac->dma_pdev->dev,
328                           TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
329                           mac->tx->desc, mac->tx->dma);
330
331         kfree(mac->tx->desc_info);
332         kfree(mac->tx);
333         mac->tx = NULL;
334 }
335
336 static void pasemi_mac_free_rx_resources(struct net_device *dev)
337 {
338         struct pasemi_mac *mac = netdev_priv(dev);
339         unsigned int i;
340         struct pasemi_mac_buffer *info;
341         struct pas_dma_xct_descr *dp;
342
343         for (i = 0; i < RX_RING_SIZE; i++) {
344                 info = &RX_DESC_INFO(mac, i);
345                 dp = &RX_DESC(mac, i);
346                 if (info->skb) {
347                         if (info->dma) {
348                                 pci_unmap_single(mac->dma_pdev,
349                                                  info->dma,
350                                                  info->skb->len,
351                                                  PCI_DMA_FROMDEVICE);
352                                 dev_kfree_skb_any(info->skb);
353                         }
354                         info->dma = 0;
355                         info->skb = NULL;
356                         dp->macrx = 0;
357                         dp->ptr = 0;
358                 }
359         }
360
361         dma_free_coherent(&mac->dma_pdev->dev,
362                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
363                           mac->rx->desc, mac->rx->dma);
364
365         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
366                           mac->rx->buffers, mac->rx->buf_dma);
367
368         kfree(mac->rx->desc_info);
369         kfree(mac->rx);
370         mac->rx = NULL;
371 }
372
373 static void pasemi_mac_replenish_rx_ring(struct net_device *dev, int limit)
374 {
375         struct pasemi_mac *mac = netdev_priv(dev);
376         unsigned int i;
377         int start = mac->rx->next_to_fill;
378         int count;
379
380         if (limit <= 0)
381                 return;
382
383         i = start;
384         for (count = 0; count < limit; count++) {
385                 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
386                 u64 *buff = &RX_BUFF(mac, i);
387                 struct sk_buff *skb;
388                 dma_addr_t dma;
389
390                 /* skb might still be in there for recycle on short receives */
391                 if (info->skb)
392                         skb = info->skb;
393                 else
394                         skb = dev_alloc_skb(BUF_SIZE);
395
396                 if (unlikely(!skb))
397                         break;
398
399                 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
400                                      PCI_DMA_FROMDEVICE);
401
402                 if (unlikely(dma_mapping_error(dma))) {
403                         dev_kfree_skb_irq(info->skb);
404                         break;
405                 }
406
407                 info->skb = skb;
408                 info->dma = dma;
409                 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
410                 i++;
411         }
412
413         wmb();
414
415         write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), count);
416         write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), count);
417
418         mac->rx->next_to_fill += count;
419 }
420
421 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
422 {
423         unsigned int reg, pcnt;
424         /* Re-enable packet count interrupts: finally
425          * ack the packet count interrupt we got in rx_intr.
426          */
427
428         pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
429
430         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
431
432         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
433 }
434
435 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
436 {
437         unsigned int reg, pcnt;
438
439         /* Re-enable packet count interrupts */
440         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
441
442         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
443
444         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
445 }
446
447
448 static inline void pasemi_mac_rx_error(struct pasemi_mac *mac, u64 macrx)
449 {
450         unsigned int rcmdsta, ccmdsta;
451
452         if (!netif_msg_rx_err(mac))
453                 return;
454
455         rcmdsta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
456         ccmdsta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
457
458         printk(KERN_ERR "pasemi_mac: rx error. macrx %016lx, rx status %lx\n",
459                 macrx, *mac->rx_status);
460
461         printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n",
462                 rcmdsta, ccmdsta);
463 }
464
465 static inline void pasemi_mac_tx_error(struct pasemi_mac *mac, u64 mactx)
466 {
467         unsigned int cmdsta;
468
469         if (!netif_msg_tx_err(mac))
470                 return;
471
472         cmdsta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
473
474         printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016lx, "\
475                 "tx status 0x%016lx\n", mactx, *mac->tx_status);
476
477         printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta);
478 }
479
480 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
481 {
482         unsigned int n;
483         int count;
484         struct pas_dma_xct_descr *dp;
485         struct pasemi_mac_buffer *info;
486         struct sk_buff *skb;
487         unsigned int i, len;
488         u64 macrx;
489         dma_addr_t dma;
490
491         spin_lock(&mac->rx->lock);
492
493         n = mac->rx->next_to_clean;
494
495         for (count = limit; count; count--) {
496
497                 rmb();
498
499                 dp = &RX_DESC(mac, n);
500                 prefetchw(dp);
501                 macrx = dp->macrx;
502
503                 if ((macrx & XCT_MACRX_E) ||
504                     (*mac->rx_status & PAS_STATUS_ERROR))
505                         pasemi_mac_rx_error(mac, macrx);
506
507                 if (!(macrx & XCT_MACRX_O))
508                         break;
509
510                 info = NULL;
511
512                 /* We have to scan for our skb since there's no way
513                  * to back-map them from the descriptor, and if we
514                  * have several receive channels then they might not
515                  * show up in the same order as they were put on the
516                  * interface ring.
517                  */
518
519                 dma = (dp->ptr & XCT_PTR_ADDR_M);
520                 for (i = n; i < (n + RX_RING_SIZE); i++) {
521                         info = &RX_DESC_INFO(mac, i);
522                         if (info->dma == dma)
523                                 break;
524                 }
525                 prefetchw(info);
526
527                 skb = info->skb;
528                 prefetchw(skb);
529                 info->dma = 0;
530
531                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
532                                  PCI_DMA_FROMDEVICE);
533
534                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
535
536                 if (len < 256) {
537                         struct sk_buff *new_skb =
538                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
539                         if (new_skb) {
540                                 skb_reserve(new_skb, NET_IP_ALIGN);
541                                 memcpy(new_skb->data, skb->data, len);
542                                 /* save the skb in buffer_info as good */
543                                 skb = new_skb;
544                         }
545                         /* else just continue with the old one */
546                 } else
547                         info->skb = NULL;
548
549                 skb_put(skb, len);
550
551                 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
552                         skb->ip_summed = CHECKSUM_UNNECESSARY;
553                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
554                                            XCT_MACRX_CSUM_S;
555                 } else
556                         skb->ip_summed = CHECKSUM_NONE;
557
558                 mac->netdev->stats.rx_bytes += len;
559                 mac->netdev->stats.rx_packets++;
560
561                 skb->protocol = eth_type_trans(skb, mac->netdev);
562                 netif_receive_skb(skb);
563
564                 dp->ptr = 0;
565                 dp->macrx = 0;
566
567                 n++;
568         }
569
570         mac->rx->next_to_clean += limit - count;
571         pasemi_mac_replenish_rx_ring(mac->netdev, limit-count);
572
573         spin_unlock(&mac->rx->lock);
574
575         return count;
576 }
577
578 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
579 {
580         int i;
581         struct pasemi_mac_buffer *info;
582         struct pas_dma_xct_descr *dp;
583         unsigned int start, count, limit;
584         unsigned int total_count;
585         unsigned long flags;
586         struct sk_buff *skbs[32];
587         dma_addr_t dmas[32];
588
589         total_count = 0;
590 restart:
591         spin_lock_irqsave(&mac->tx->lock, flags);
592
593         start = mac->tx->next_to_clean;
594         limit = min(mac->tx->next_to_fill, start+32);
595
596         count = 0;
597
598         for (i = start; i < limit; i++) {
599                 dp = &TX_DESC(mac, i);
600
601                 if ((dp->mactx & XCT_MACTX_E) ||
602                     (*mac->tx_status & PAS_STATUS_ERROR))
603                         pasemi_mac_tx_error(mac, dp->mactx);
604
605                 if (unlikely(dp->mactx & XCT_MACTX_O))
606                         /* Not yet transmitted */
607                         break;
608
609                 info = &TX_DESC_INFO(mac, i);
610                 skbs[count] = info->skb;
611                 dmas[count] = info->dma;
612
613                 info->skb = NULL;
614                 info->dma = 0;
615                 dp->mactx = 0;
616                 dp->ptr = 0;
617
618                 count++;
619         }
620         mac->tx->next_to_clean += count;
621         spin_unlock_irqrestore(&mac->tx->lock, flags);
622         netif_wake_queue(mac->netdev);
623
624         for (i = 0; i < count; i++) {
625                 pci_unmap_single(mac->dma_pdev, dmas[i],
626                                  skbs[i]->len, PCI_DMA_TODEVICE);
627                 dev_kfree_skb_irq(skbs[i]);
628         }
629
630         total_count += count;
631
632         /* If the batch was full, try to clean more */
633         if (count == 32)
634                 goto restart;
635
636         return total_count;
637 }
638
639
640 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
641 {
642         struct net_device *dev = data;
643         struct pasemi_mac *mac = netdev_priv(dev);
644         unsigned int reg;
645
646         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
647                 return IRQ_NONE;
648
649         /* Don't reset packet count so it won't fire again but clear
650          * all others.
651          */
652
653         reg = 0;
654         if (*mac->rx_status & PAS_STATUS_SOFT)
655                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
656         if (*mac->rx_status & PAS_STATUS_ERROR)
657                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
658         if (*mac->rx_status & PAS_STATUS_TIMER)
659                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
660
661         netif_rx_schedule(dev, &mac->napi);
662
663         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
664
665         return IRQ_HANDLED;
666 }
667
668 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
669 {
670         struct net_device *dev = data;
671         struct pasemi_mac *mac = netdev_priv(dev);
672         unsigned int reg, pcnt;
673
674         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
675                 return IRQ_NONE;
676
677         pasemi_mac_clean_tx(mac);
678
679         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
680
681         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
682
683         if (*mac->tx_status & PAS_STATUS_SOFT)
684                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
685         if (*mac->tx_status & PAS_STATUS_ERROR)
686                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
687
688         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
689
690         return IRQ_HANDLED;
691 }
692
693 static void pasemi_adjust_link(struct net_device *dev)
694 {
695         struct pasemi_mac *mac = netdev_priv(dev);
696         int msg;
697         unsigned int flags;
698         unsigned int new_flags;
699
700         if (!mac->phydev->link) {
701                 /* If no link, MAC speed settings don't matter. Just report
702                  * link down and return.
703                  */
704                 if (mac->link && netif_msg_link(mac))
705                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
706
707                 netif_carrier_off(dev);
708                 mac->link = 0;
709
710                 return;
711         } else
712                 netif_carrier_on(dev);
713
714         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
715         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
716                               PAS_MAC_CFG_PCFG_TSR_M);
717
718         if (!mac->phydev->duplex)
719                 new_flags |= PAS_MAC_CFG_PCFG_HD;
720
721         switch (mac->phydev->speed) {
722         case 1000:
723                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
724                              PAS_MAC_CFG_PCFG_TSR_1G;
725                 break;
726         case 100:
727                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
728                              PAS_MAC_CFG_PCFG_TSR_100M;
729                 break;
730         case 10:
731                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
732                              PAS_MAC_CFG_PCFG_TSR_10M;
733                 break;
734         default:
735                 printk("Unsupported speed %d\n", mac->phydev->speed);
736         }
737
738         /* Print on link or speed/duplex change */
739         msg = mac->link != mac->phydev->link || flags != new_flags;
740
741         mac->duplex = mac->phydev->duplex;
742         mac->speed = mac->phydev->speed;
743         mac->link = mac->phydev->link;
744
745         if (new_flags != flags)
746                 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
747
748         if (msg && netif_msg_link(mac))
749                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
750                        dev->name, mac->speed, mac->duplex ? "full" : "half");
751 }
752
753 static int pasemi_mac_phy_init(struct net_device *dev)
754 {
755         struct pasemi_mac *mac = netdev_priv(dev);
756         struct device_node *dn, *phy_dn;
757         struct phy_device *phydev;
758         unsigned int phy_id;
759         const phandle *ph;
760         const unsigned int *prop;
761         struct resource r;
762         int ret;
763
764         dn = pci_device_to_OF_node(mac->pdev);
765         ph = of_get_property(dn, "phy-handle", NULL);
766         if (!ph)
767                 return -ENODEV;
768         phy_dn = of_find_node_by_phandle(*ph);
769
770         prop = of_get_property(phy_dn, "reg", NULL);
771         ret = of_address_to_resource(phy_dn->parent, 0, &r);
772         if (ret)
773                 goto err;
774
775         phy_id = *prop;
776         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
777
778         of_node_put(phy_dn);
779
780         mac->link = 0;
781         mac->speed = 0;
782         mac->duplex = -1;
783
784         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
785
786         if (IS_ERR(phydev)) {
787                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
788                 return PTR_ERR(phydev);
789         }
790
791         mac->phydev = phydev;
792
793         return 0;
794
795 err:
796         of_node_put(phy_dn);
797         return -ENODEV;
798 }
799
800
801 static int pasemi_mac_open(struct net_device *dev)
802 {
803         struct pasemi_mac *mac = netdev_priv(dev);
804         int base_irq;
805         unsigned int flags;
806         int ret;
807
808         /* enable rx section */
809         write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
810
811         /* enable tx section */
812         write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
813
814         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
815                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
816                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
817
818         write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
819
820         write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
821                            PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
822
823         write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
824                            PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
825
826         /* Clear out any residual packet count state from firmware */
827         pasemi_mac_restart_rx_intr(mac);
828         pasemi_mac_restart_tx_intr(mac);
829
830         /* 0xffffff is max value, about 16ms */
831         write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
832                            PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
833
834         ret = pasemi_mac_setup_rx_resources(dev);
835         if (ret)
836                 goto out_rx_resources;
837
838         ret = pasemi_mac_setup_tx_resources(dev);
839         if (ret)
840                 goto out_tx_resources;
841
842         write_mac_reg(mac, PAS_MAC_IPC_CHNL,
843                            PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
844                            PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
845
846         /* enable rx if */
847         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
848                            PAS_DMA_RXINT_RCMDSTA_EN);
849
850         /* enable rx channel */
851         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
852                            PAS_DMA_RXCHAN_CCMDSTA_EN |
853                            PAS_DMA_RXCHAN_CCMDSTA_DU);
854
855         /* enable tx channel */
856         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
857                            PAS_DMA_TXCHAN_TCMDSTA_EN);
858
859         pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
860
861         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
862                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
863
864         if (mac->type == MAC_TYPE_GMAC)
865                 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
866         else
867                 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
868
869         /* Enable interface in MAC */
870         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
871
872         ret = pasemi_mac_phy_init(dev);
873         /* Some configs don't have PHYs (XAUI etc), so don't complain about
874          * failed init due to -ENODEV.
875          */
876         if (ret && ret != -ENODEV)
877                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
878
879         netif_start_queue(dev);
880         napi_enable(&mac->napi);
881
882         /* Interrupts are a bit different for our DMA controller: While
883          * it's got one a regular PCI device header, the interrupt there
884          * is really the base of the range it's using. Each tx and rx
885          * channel has it's own interrupt source.
886          */
887
888         base_irq = virq_to_hw(mac->dma_pdev->irq);
889
890         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
891         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
892
893         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
894                           mac->tx->irq_name, dev);
895         if (ret) {
896                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
897                         base_irq + mac->dma_txch, ret);
898                 goto out_tx_int;
899         }
900
901         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
902                           mac->rx->irq_name, dev);
903         if (ret) {
904                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
905                         base_irq + 20 + mac->dma_rxch, ret);
906                 goto out_rx_int;
907         }
908
909         if (mac->phydev)
910                 phy_start(mac->phydev);
911
912         return 0;
913
914 out_rx_int:
915         free_irq(mac->tx_irq, dev);
916 out_tx_int:
917         napi_disable(&mac->napi);
918         netif_stop_queue(dev);
919         pasemi_mac_free_tx_resources(dev);
920 out_tx_resources:
921         pasemi_mac_free_rx_resources(dev);
922 out_rx_resources:
923
924         return ret;
925 }
926
927 #define MAX_RETRIES 5000
928
929 static int pasemi_mac_close(struct net_device *dev)
930 {
931         struct pasemi_mac *mac = netdev_priv(dev);
932         unsigned int stat;
933         int retries;
934
935         if (mac->phydev) {
936                 phy_stop(mac->phydev);
937                 phy_disconnect(mac->phydev);
938         }
939
940         netif_stop_queue(dev);
941         napi_disable(&mac->napi);
942
943         /* Clean out any pending buffers */
944         pasemi_mac_clean_tx(mac);
945         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
946
947         /* Disable interface */
948         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
949         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
950         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
951
952         for (retries = 0; retries < MAX_RETRIES; retries++) {
953                 stat = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
954                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
955                         break;
956                 cond_resched();
957         }
958
959         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
960                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
961
962         for (retries = 0; retries < MAX_RETRIES; retries++) {
963                 stat = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
964                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
965                         break;
966                 cond_resched();
967         }
968
969         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
970                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
971
972         for (retries = 0; retries < MAX_RETRIES; retries++) {
973                 stat = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
974                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
975                         break;
976                 cond_resched();
977         }
978
979         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
980                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
981
982         /* Then, disable the channel. This must be done separately from
983          * stopping, since you can't disable when active.
984          */
985
986         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
987         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
988         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
989
990         free_irq(mac->tx_irq, dev);
991         free_irq(mac->rx_irq, dev);
992
993         /* Free resources */
994         pasemi_mac_free_rx_resources(dev);
995         pasemi_mac_free_tx_resources(dev);
996
997         return 0;
998 }
999
1000 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
1001 {
1002         struct pasemi_mac *mac = netdev_priv(dev);
1003         struct pasemi_mac_txring *txring;
1004         struct pasemi_mac_buffer *info;
1005         struct pas_dma_xct_descr *dp;
1006         u64 dflags, mactx, ptr;
1007         dma_addr_t map;
1008         unsigned long flags;
1009
1010         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
1011
1012         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1013                 const unsigned char *nh = skb_network_header(skb);
1014
1015                 switch (ip_hdr(skb)->protocol) {
1016                 case IPPROTO_TCP:
1017                         dflags |= XCT_MACTX_CSUM_TCP;
1018                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
1019                         dflags |= XCT_MACTX_IPO(nh - skb->data);
1020                         break;
1021                 case IPPROTO_UDP:
1022                         dflags |= XCT_MACTX_CSUM_UDP;
1023                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
1024                         dflags |= XCT_MACTX_IPO(nh - skb->data);
1025                         break;
1026                 }
1027         }
1028
1029         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
1030
1031         if (dma_mapping_error(map))
1032                 return NETDEV_TX_BUSY;
1033
1034         mactx = dflags | XCT_MACTX_LLEN(skb->len);
1035         ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1036
1037         txring = mac->tx;
1038
1039         spin_lock_irqsave(&txring->lock, flags);
1040
1041         if (RING_AVAIL(txring) <= 1) {
1042                 spin_unlock_irqrestore(&txring->lock, flags);
1043                 pasemi_mac_clean_tx(mac);
1044                 pasemi_mac_restart_tx_intr(mac);
1045                 spin_lock_irqsave(&txring->lock, flags);
1046
1047                 if (RING_AVAIL(txring) <= 1) {
1048                         /* Still no room -- stop the queue and wait for tx
1049                          * intr when there's room.
1050                          */
1051                         netif_stop_queue(dev);
1052                         goto out_err;
1053                 }
1054         }
1055
1056         dp = &TX_DESC(mac, txring->next_to_fill);
1057         info = &TX_DESC_INFO(mac, txring->next_to_fill);
1058
1059         dp->mactx = mactx;
1060         dp->ptr   = ptr;
1061         info->dma = map;
1062         info->skb = skb;
1063
1064         txring->next_to_fill++;
1065         dev->stats.tx_packets++;
1066         dev->stats.tx_bytes += skb->len;
1067
1068         spin_unlock_irqrestore(&txring->lock, flags);
1069
1070         write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1071
1072         return NETDEV_TX_OK;
1073
1074 out_err:
1075         spin_unlock_irqrestore(&txring->lock, flags);
1076         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1077         return NETDEV_TX_BUSY;
1078 }
1079
1080 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1081 {
1082         struct pasemi_mac *mac = netdev_priv(dev);
1083         unsigned int flags;
1084
1085         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1086
1087         /* Set promiscuous */
1088         if (dev->flags & IFF_PROMISC)
1089                 flags |= PAS_MAC_CFG_PCFG_PR;
1090         else
1091                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1092
1093         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1094 }
1095
1096
1097 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1098 {
1099         struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1100         struct net_device *dev = mac->netdev;
1101         int pkts;
1102
1103         pasemi_mac_clean_tx(mac);
1104         pkts = pasemi_mac_clean_rx(mac, budget);
1105         if (pkts < budget) {
1106                 /* all done, no more packets present */
1107                 netif_rx_complete(dev, napi);
1108
1109                 pasemi_mac_restart_rx_intr(mac);
1110         }
1111         return pkts;
1112 }
1113
1114 static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
1115 {
1116         struct device_node *dn;
1117         void __iomem *ret;
1118
1119         dn = pci_device_to_OF_node(p);
1120         if (!dn)
1121                 goto fallback;
1122
1123         ret = of_iomap(dn, index);
1124         if (!ret)
1125                 goto fallback;
1126
1127         return ret;
1128 fallback:
1129         /* This is hardcoded and ugly, but we have some firmware versions
1130          * that don't provide the register space in the device tree. Luckily
1131          * they are at well-known locations so we can just do the math here.
1132          */
1133         return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
1134 }
1135
1136 static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
1137 {
1138         struct resource res;
1139         struct device_node *dn;
1140         int err;
1141
1142         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1143         if (!mac->dma_pdev) {
1144                 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1145                 return -ENODEV;
1146         }
1147
1148         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1149         if (!mac->iob_pdev) {
1150                 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1151                 return -ENODEV;
1152         }
1153
1154         mac->regs = map_onedev(mac->pdev, 0);
1155         mac->dma_regs = map_onedev(mac->dma_pdev, 0);
1156         mac->iob_regs = map_onedev(mac->iob_pdev, 0);
1157
1158         if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
1159                 dev_err(&mac->pdev->dev, "Can't map registers\n");
1160                 return -ENODEV;
1161         }
1162
1163         /* The dma status structure is located in the I/O bridge, and
1164          * is cache coherent.
1165          */
1166         if (!dma_status) {
1167                 dn = pci_device_to_OF_node(mac->iob_pdev);
1168                 if (dn)
1169                         err = of_address_to_resource(dn, 1, &res);
1170                 if (!dn || err) {
1171                         /* Fallback for old firmware */
1172                         res.start = 0xfd800000;
1173                         res.end = res.start + 0x1000;
1174                 }
1175                 dma_status = __ioremap(res.start, res.end-res.start, 0);
1176         }
1177
1178         return 0;
1179 }
1180
1181 static int __devinit
1182 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1183 {
1184         static int index = 0;
1185         struct net_device *dev;
1186         struct pasemi_mac *mac;
1187         int err;
1188         DECLARE_MAC_BUF(mac_buf);
1189
1190         err = pci_enable_device(pdev);
1191         if (err)
1192                 return err;
1193
1194         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1195         if (dev == NULL) {
1196                 dev_err(&pdev->dev,
1197                         "pasemi_mac: Could not allocate ethernet device.\n");
1198                 err = -ENOMEM;
1199                 goto out_disable_device;
1200         }
1201
1202         pci_set_drvdata(pdev, dev);
1203         SET_NETDEV_DEV(dev, &pdev->dev);
1204
1205         mac = netdev_priv(dev);
1206
1207         mac->pdev = pdev;
1208         mac->netdev = dev;
1209
1210         netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1211
1212         dev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
1213
1214         /* These should come out of the device tree eventually */
1215         mac->dma_txch = index;
1216         mac->dma_rxch = index;
1217
1218         /* We probe GMAC before XAUI, but the DMA interfaces are
1219          * in XAUI, GMAC order.
1220          */
1221         if (index < 4)
1222                 mac->dma_if = index + 2;
1223         else
1224                 mac->dma_if = index - 4;
1225         index++;
1226
1227         switch (pdev->device) {
1228         case 0xa005:
1229                 mac->type = MAC_TYPE_GMAC;
1230                 break;
1231         case 0xa006:
1232                 mac->type = MAC_TYPE_XAUI;
1233                 break;
1234         default:
1235                 err = -ENODEV;
1236                 goto out;
1237         }
1238
1239         /* get mac addr from device tree */
1240         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1241                 err = -ENODEV;
1242                 goto out;
1243         }
1244         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1245
1246         dev->open = pasemi_mac_open;
1247         dev->stop = pasemi_mac_close;
1248         dev->hard_start_xmit = pasemi_mac_start_tx;
1249         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1250
1251         err = pasemi_mac_map_regs(mac);
1252         if (err)
1253                 goto out;
1254
1255         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1256         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1257
1258         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1259
1260         /* Enable most messages by default */
1261         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1262
1263         err = register_netdev(dev);
1264
1265         if (err) {
1266                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1267                         err);
1268                 goto out;
1269         } else if netif_msg_probe(mac)
1270                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1271                        "hw addr %s\n",
1272                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1273                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1274                        print_mac(mac_buf, dev->dev_addr));
1275
1276         return err;
1277
1278 out:
1279         if (mac->iob_pdev)
1280                 pci_dev_put(mac->iob_pdev);
1281         if (mac->dma_pdev)
1282                 pci_dev_put(mac->dma_pdev);
1283         if (mac->dma_regs)
1284                 iounmap(mac->dma_regs);
1285         if (mac->iob_regs)
1286                 iounmap(mac->iob_regs);
1287         if (mac->regs)
1288                 iounmap(mac->regs);
1289
1290         free_netdev(dev);
1291 out_disable_device:
1292         pci_disable_device(pdev);
1293         return err;
1294
1295 }
1296
1297 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1298 {
1299         struct net_device *netdev = pci_get_drvdata(pdev);
1300         struct pasemi_mac *mac;
1301
1302         if (!netdev)
1303                 return;
1304
1305         mac = netdev_priv(netdev);
1306
1307         unregister_netdev(netdev);
1308
1309         pci_disable_device(pdev);
1310         pci_dev_put(mac->dma_pdev);
1311         pci_dev_put(mac->iob_pdev);
1312
1313         iounmap(mac->regs);
1314         iounmap(mac->dma_regs);
1315         iounmap(mac->iob_regs);
1316
1317         pci_set_drvdata(pdev, NULL);
1318         free_netdev(netdev);
1319 }
1320
1321 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1322         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1323         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1324         { },
1325 };
1326
1327 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1328
1329 static struct pci_driver pasemi_mac_driver = {
1330         .name           = "pasemi_mac",
1331         .id_table       = pasemi_mac_pci_tbl,
1332         .probe          = pasemi_mac_probe,
1333         .remove         = __devexit_p(pasemi_mac_remove),
1334 };
1335
1336 static void __exit pasemi_mac_cleanup_module(void)
1337 {
1338         pci_unregister_driver(&pasemi_mac_driver);
1339         __iounmap(dma_status);
1340         dma_status = NULL;
1341 }
1342
1343 int pasemi_mac_init_module(void)
1344 {
1345         return pci_register_driver(&pasemi_mac_driver);
1346 }
1347
1348 module_init(pasemi_mac_init_module);
1349 module_exit(pasemi_mac_cleanup_module);