smsc95xx: Add module params to read MAC address
[linux-2.6.git] / 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/slab.h>
24 #include <linux/interrupt.h>
25 #include <linux/dmaengine.h>
26 #include <linux/delay.h>
27 #include <linux/netdevice.h>
28 #include <linux/of_mdio.h>
29 #include <linux/etherdevice.h>
30 #include <asm/dma-mapping.h>
31 #include <linux/in.h>
32 #include <linux/skbuff.h>
33
34 #include <linux/ip.h>
35 #include <linux/tcp.h>
36 #include <net/checksum.h>
37 #include <linux/inet_lro.h>
38 #include <linux/prefetch.h>
39
40 #include <asm/irq.h>
41 #include <asm/firmware.h>
42 #include <asm/pasemi_dma.h>
43
44 #include "pasemi_mac.h"
45
46 /* We have our own align, since ppc64 in general has it at 0 because
47  * of design flaws in some of the server bridge chips. However, for
48  * PWRficient doing the unaligned copies is more expensive than doing
49  * unaligned DMA, so make sure the data is aligned instead.
50  */
51 #define LOCAL_SKB_ALIGN 2
52
53 /* TODO list
54  *
55  * - Multicast support
56  * - Large MTU support
57  * - SW LRO
58  * - Multiqueue RX/TX
59  */
60
61 #define LRO_MAX_AGGR 64
62
63 #define PE_MIN_MTU      64
64 #define PE_MAX_MTU      9000
65 #define PE_DEF_MTU      ETH_DATA_LEN
66
67 #define DEFAULT_MSG_ENABLE        \
68         (NETIF_MSG_DRV          | \
69          NETIF_MSG_PROBE        | \
70          NETIF_MSG_LINK         | \
71          NETIF_MSG_TIMER        | \
72          NETIF_MSG_IFDOWN       | \
73          NETIF_MSG_IFUP         | \
74          NETIF_MSG_RX_ERR       | \
75          NETIF_MSG_TX_ERR)
76
77 MODULE_LICENSE("GPL");
78 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
79 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
80
81 static int debug = -1;  /* -1 == use DEFAULT_MSG_ENABLE as value */
82 module_param(debug, int, 0);
83 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
84
85 extern const struct ethtool_ops pasemi_mac_ethtool_ops;
86
87 static int translation_enabled(void)
88 {
89 #if defined(CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE)
90         return 1;
91 #else
92         return firmware_has_feature(FW_FEATURE_LPAR);
93 #endif
94 }
95
96 static void write_iob_reg(unsigned int reg, unsigned int val)
97 {
98         pasemi_write_iob_reg(reg, val);
99 }
100
101 static unsigned int read_mac_reg(const struct pasemi_mac *mac, unsigned int reg)
102 {
103         return pasemi_read_mac_reg(mac->dma_if, reg);
104 }
105
106 static void write_mac_reg(const struct pasemi_mac *mac, unsigned int reg,
107                           unsigned int val)
108 {
109         pasemi_write_mac_reg(mac->dma_if, reg, val);
110 }
111
112 static unsigned int read_dma_reg(unsigned int reg)
113 {
114         return pasemi_read_dma_reg(reg);
115 }
116
117 static void write_dma_reg(unsigned int reg, unsigned int val)
118 {
119         pasemi_write_dma_reg(reg, val);
120 }
121
122 static struct pasemi_mac_rxring *rx_ring(const struct pasemi_mac *mac)
123 {
124         return mac->rx;
125 }
126
127 static struct pasemi_mac_txring *tx_ring(const struct pasemi_mac *mac)
128 {
129         return mac->tx;
130 }
131
132 static inline void prefetch_skb(const struct sk_buff *skb)
133 {
134         const void *d = skb;
135
136         prefetch(d);
137         prefetch(d+64);
138         prefetch(d+128);
139         prefetch(d+192);
140 }
141
142 static int mac_to_intf(struct pasemi_mac *mac)
143 {
144         struct pci_dev *pdev = mac->pdev;
145         u32 tmp;
146         int nintf, off, i, j;
147         int devfn = pdev->devfn;
148
149         tmp = read_dma_reg(PAS_DMA_CAP_IFI);
150         nintf = (tmp & PAS_DMA_CAP_IFI_NIN_M) >> PAS_DMA_CAP_IFI_NIN_S;
151         off = (tmp & PAS_DMA_CAP_IFI_IOFF_M) >> PAS_DMA_CAP_IFI_IOFF_S;
152
153         /* IOFF contains the offset to the registers containing the
154          * DMA interface-to-MAC-pci-id mappings, and NIN contains number
155          * of total interfaces. Each register contains 4 devfns.
156          * Just do a linear search until we find the devfn of the MAC
157          * we're trying to look up.
158          */
159
160         for (i = 0; i < (nintf+3)/4; i++) {
161                 tmp = read_dma_reg(off+4*i);
162                 for (j = 0; j < 4; j++) {
163                         if (((tmp >> (8*j)) & 0xff) == devfn)
164                                 return i*4 + j;
165                 }
166         }
167         return -1;
168 }
169
170 static void pasemi_mac_intf_disable(struct pasemi_mac *mac)
171 {
172         unsigned int flags;
173
174         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
175         flags &= ~PAS_MAC_CFG_PCFG_PE;
176         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
177 }
178
179 static void pasemi_mac_intf_enable(struct pasemi_mac *mac)
180 {
181         unsigned int flags;
182
183         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
184         flags |= PAS_MAC_CFG_PCFG_PE;
185         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
186 }
187
188 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
189 {
190         struct pci_dev *pdev = mac->pdev;
191         struct device_node *dn = pci_device_to_OF_node(pdev);
192         int len;
193         const u8 *maddr;
194         u8 addr[6];
195
196         if (!dn) {
197                 dev_dbg(&pdev->dev,
198                           "No device node for mac, not configuring\n");
199                 return -ENOENT;
200         }
201
202         maddr = of_get_property(dn, "local-mac-address", &len);
203
204         if (maddr && len == 6) {
205                 memcpy(mac->mac_addr, maddr, 6);
206                 return 0;
207         }
208
209         /* Some old versions of firmware mistakenly uses mac-address
210          * (and as a string) instead of a byte array in local-mac-address.
211          */
212
213         if (maddr == NULL)
214                 maddr = of_get_property(dn, "mac-address", NULL);
215
216         if (maddr == NULL) {
217                 dev_warn(&pdev->dev,
218                          "no mac address in device tree, not configuring\n");
219                 return -ENOENT;
220         }
221
222         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
223                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
224                 dev_warn(&pdev->dev,
225                          "can't parse mac address, not configuring\n");
226                 return -EINVAL;
227         }
228
229         memcpy(mac->mac_addr, addr, 6);
230
231         return 0;
232 }
233
234 static int pasemi_mac_set_mac_addr(struct net_device *dev, void *p)
235 {
236         struct pasemi_mac *mac = netdev_priv(dev);
237         struct sockaddr *addr = p;
238         unsigned int adr0, adr1;
239
240         if (!is_valid_ether_addr(addr->sa_data))
241                 return -EINVAL;
242
243         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
244
245         adr0 = dev->dev_addr[2] << 24 |
246                dev->dev_addr[3] << 16 |
247                dev->dev_addr[4] << 8 |
248                dev->dev_addr[5];
249         adr1 = read_mac_reg(mac, PAS_MAC_CFG_ADR1);
250         adr1 &= ~0xffff;
251         adr1 |= dev->dev_addr[0] << 8 | dev->dev_addr[1];
252
253         pasemi_mac_intf_disable(mac);
254         write_mac_reg(mac, PAS_MAC_CFG_ADR0, adr0);
255         write_mac_reg(mac, PAS_MAC_CFG_ADR1, adr1);
256         pasemi_mac_intf_enable(mac);
257
258         return 0;
259 }
260
261 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
262                        void **tcph, u64 *hdr_flags, void *data)
263 {
264         u64 macrx = (u64) data;
265         unsigned int ip_len;
266         struct iphdr *iph;
267
268         /* IPv4 header checksum failed */
269         if ((macrx & XCT_MACRX_HTY_M) != XCT_MACRX_HTY_IPV4_OK)
270                 return -1;
271
272         /* non tcp packet */
273         skb_reset_network_header(skb);
274         iph = ip_hdr(skb);
275         if (iph->protocol != IPPROTO_TCP)
276                 return -1;
277
278         ip_len = ip_hdrlen(skb);
279         skb_set_transport_header(skb, ip_len);
280         *tcph = tcp_hdr(skb);
281
282         /* check if ip header and tcp header are complete */
283         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
284                 return -1;
285
286         *hdr_flags = LRO_IPV4 | LRO_TCP;
287         *iphdr = iph;
288
289         return 0;
290 }
291
292 static int pasemi_mac_unmap_tx_skb(struct pasemi_mac *mac,
293                                     const int nfrags,
294                                     struct sk_buff *skb,
295                                     const dma_addr_t *dmas)
296 {
297         int f;
298         struct pci_dev *pdev = mac->dma_pdev;
299
300         pci_unmap_single(pdev, dmas[0], skb_headlen(skb), PCI_DMA_TODEVICE);
301
302         for (f = 0; f < nfrags; f++) {
303                 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
304
305                 pci_unmap_page(pdev, dmas[f+1], frag->size, PCI_DMA_TODEVICE);
306         }
307         dev_kfree_skb_irq(skb);
308
309         /* Freed descriptor slot + main SKB ptr + nfrags additional ptrs,
310          * aligned up to a power of 2
311          */
312         return (nfrags + 3) & ~1;
313 }
314
315 static struct pasemi_mac_csring *pasemi_mac_setup_csring(struct pasemi_mac *mac)
316 {
317         struct pasemi_mac_csring *ring;
318         u32 val;
319         unsigned int cfg;
320         int chno;
321
322         ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_csring),
323                                        offsetof(struct pasemi_mac_csring, chan));
324
325         if (!ring) {
326                 dev_err(&mac->pdev->dev, "Can't allocate checksum channel\n");
327                 goto out_chan;
328         }
329
330         chno = ring->chan.chno;
331
332         ring->size = CS_RING_SIZE;
333         ring->next_to_fill = 0;
334
335         /* Allocate descriptors */
336         if (pasemi_dma_alloc_ring(&ring->chan, CS_RING_SIZE))
337                 goto out_ring_desc;
338
339         write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno),
340                       PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma));
341         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32);
342         val |= PAS_DMA_TXCHAN_BASEU_SIZ(CS_RING_SIZE >> 3);
343
344         write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val);
345
346         ring->events[0] = pasemi_dma_alloc_flag();
347         ring->events[1] = pasemi_dma_alloc_flag();
348         if (ring->events[0] < 0 || ring->events[1] < 0)
349                 goto out_flags;
350
351         pasemi_dma_clear_flag(ring->events[0]);
352         pasemi_dma_clear_flag(ring->events[1]);
353
354         ring->fun = pasemi_dma_alloc_fun();
355         if (ring->fun < 0)
356                 goto out_fun;
357
358         cfg = PAS_DMA_TXCHAN_CFG_TY_FUNC | PAS_DMA_TXCHAN_CFG_UP |
359               PAS_DMA_TXCHAN_CFG_TATTR(ring->fun) |
360               PAS_DMA_TXCHAN_CFG_LPSQ | PAS_DMA_TXCHAN_CFG_LPDQ;
361
362         if (translation_enabled())
363                 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR;
364
365         write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg);
366
367         /* enable channel */
368         pasemi_dma_start_chan(&ring->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ |
369                                            PAS_DMA_TXCHAN_TCMDSTA_DB |
370                                            PAS_DMA_TXCHAN_TCMDSTA_DE |
371                                            PAS_DMA_TXCHAN_TCMDSTA_DA);
372
373         return ring;
374
375 out_fun:
376 out_flags:
377         if (ring->events[0] >= 0)
378                 pasemi_dma_free_flag(ring->events[0]);
379         if (ring->events[1] >= 0)
380                 pasemi_dma_free_flag(ring->events[1]);
381         pasemi_dma_free_ring(&ring->chan);
382 out_ring_desc:
383         pasemi_dma_free_chan(&ring->chan);
384 out_chan:
385
386         return NULL;
387 }
388
389 static void pasemi_mac_setup_csrings(struct pasemi_mac *mac)
390 {
391         int i;
392         mac->cs[0] = pasemi_mac_setup_csring(mac);
393         if (mac->type == MAC_TYPE_XAUI)
394                 mac->cs[1] = pasemi_mac_setup_csring(mac);
395         else
396                 mac->cs[1] = 0;
397
398         for (i = 0; i < MAX_CS; i++)
399                 if (mac->cs[i])
400                         mac->num_cs++;
401 }
402
403 static void pasemi_mac_free_csring(struct pasemi_mac_csring *csring)
404 {
405         pasemi_dma_stop_chan(&csring->chan);
406         pasemi_dma_free_flag(csring->events[0]);
407         pasemi_dma_free_flag(csring->events[1]);
408         pasemi_dma_free_ring(&csring->chan);
409         pasemi_dma_free_chan(&csring->chan);
410         pasemi_dma_free_fun(csring->fun);
411 }
412
413 static int pasemi_mac_setup_rx_resources(const struct net_device *dev)
414 {
415         struct pasemi_mac_rxring *ring;
416         struct pasemi_mac *mac = netdev_priv(dev);
417         int chno;
418         unsigned int cfg;
419
420         ring = pasemi_dma_alloc_chan(RXCHAN, sizeof(struct pasemi_mac_rxring),
421                                      offsetof(struct pasemi_mac_rxring, chan));
422
423         if (!ring) {
424                 dev_err(&mac->pdev->dev, "Can't allocate RX channel\n");
425                 goto out_chan;
426         }
427         chno = ring->chan.chno;
428
429         spin_lock_init(&ring->lock);
430
431         ring->size = RX_RING_SIZE;
432         ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
433                                   RX_RING_SIZE, GFP_KERNEL);
434
435         if (!ring->ring_info)
436                 goto out_ring_info;
437
438         /* Allocate descriptors */
439         if (pasemi_dma_alloc_ring(&ring->chan, RX_RING_SIZE))
440                 goto out_ring_desc;
441
442         ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
443                                            RX_RING_SIZE * sizeof(u64),
444                                            &ring->buf_dma, GFP_KERNEL);
445         if (!ring->buffers)
446                 goto out_ring_desc;
447
448         memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
449
450         write_dma_reg(PAS_DMA_RXCHAN_BASEL(chno),
451                       PAS_DMA_RXCHAN_BASEL_BRBL(ring->chan.ring_dma));
452
453         write_dma_reg(PAS_DMA_RXCHAN_BASEU(chno),
454                       PAS_DMA_RXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32) |
455                       PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3));
456
457         cfg = PAS_DMA_RXCHAN_CFG_HBU(2);
458
459         if (translation_enabled())
460                 cfg |= PAS_DMA_RXCHAN_CFG_CTR;
461
462         write_dma_reg(PAS_DMA_RXCHAN_CFG(chno), cfg);
463
464         write_dma_reg(PAS_DMA_RXINT_BASEL(mac->dma_if),
465                       PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma));
466
467         write_dma_reg(PAS_DMA_RXINT_BASEU(mac->dma_if),
468                       PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) |
469                       PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
470
471         cfg = PAS_DMA_RXINT_CFG_DHL(2) | PAS_DMA_RXINT_CFG_L2 |
472               PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP |
473               PAS_DMA_RXINT_CFG_HEN;
474
475         if (translation_enabled())
476                 cfg |= PAS_DMA_RXINT_CFG_ITRR | PAS_DMA_RXINT_CFG_ITR;
477
478         write_dma_reg(PAS_DMA_RXINT_CFG(mac->dma_if), cfg);
479
480         ring->next_to_fill = 0;
481         ring->next_to_clean = 0;
482         ring->mac = mac;
483         mac->rx = ring;
484
485         return 0;
486
487 out_ring_desc:
488         kfree(ring->ring_info);
489 out_ring_info:
490         pasemi_dma_free_chan(&ring->chan);
491 out_chan:
492         return -ENOMEM;
493 }
494
495 static struct pasemi_mac_txring *
496 pasemi_mac_setup_tx_resources(const struct net_device *dev)
497 {
498         struct pasemi_mac *mac = netdev_priv(dev);
499         u32 val;
500         struct pasemi_mac_txring *ring;
501         unsigned int cfg;
502         int chno;
503
504         ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_txring),
505                                      offsetof(struct pasemi_mac_txring, chan));
506
507         if (!ring) {
508                 dev_err(&mac->pdev->dev, "Can't allocate TX channel\n");
509                 goto out_chan;
510         }
511
512         chno = ring->chan.chno;
513
514         spin_lock_init(&ring->lock);
515
516         ring->size = TX_RING_SIZE;
517         ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
518                                   TX_RING_SIZE, GFP_KERNEL);
519         if (!ring->ring_info)
520                 goto out_ring_info;
521
522         /* Allocate descriptors */
523         if (pasemi_dma_alloc_ring(&ring->chan, TX_RING_SIZE))
524                 goto out_ring_desc;
525
526         write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno),
527                       PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma));
528         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32);
529         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 3);
530
531         write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val);
532
533         cfg = PAS_DMA_TXCHAN_CFG_TY_IFACE |
534               PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
535               PAS_DMA_TXCHAN_CFG_UP |
536               PAS_DMA_TXCHAN_CFG_WT(4);
537
538         if (translation_enabled())
539                 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR;
540
541         write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg);
542
543         ring->next_to_fill = 0;
544         ring->next_to_clean = 0;
545         ring->mac = mac;
546
547         return ring;
548
549 out_ring_desc:
550         kfree(ring->ring_info);
551 out_ring_info:
552         pasemi_dma_free_chan(&ring->chan);
553 out_chan:
554         return NULL;
555 }
556
557 static void pasemi_mac_free_tx_resources(struct pasemi_mac *mac)
558 {
559         struct pasemi_mac_txring *txring = tx_ring(mac);
560         unsigned int i, j;
561         struct pasemi_mac_buffer *info;
562         dma_addr_t dmas[MAX_SKB_FRAGS+1];
563         int freed, nfrags;
564         int start, limit;
565
566         start = txring->next_to_clean;
567         limit = txring->next_to_fill;
568
569         /* Compensate for when fill has wrapped and clean has not */
570         if (start > limit)
571                 limit += TX_RING_SIZE;
572
573         for (i = start; i < limit; i += freed) {
574                 info = &txring->ring_info[(i+1) & (TX_RING_SIZE-1)];
575                 if (info->dma && info->skb) {
576                         nfrags = skb_shinfo(info->skb)->nr_frags;
577                         for (j = 0; j <= nfrags; j++)
578                                 dmas[j] = txring->ring_info[(i+1+j) &
579                                                 (TX_RING_SIZE-1)].dma;
580                         freed = pasemi_mac_unmap_tx_skb(mac, nfrags,
581                                                         info->skb, dmas);
582                 } else
583                         freed = 2;
584         }
585
586         kfree(txring->ring_info);
587         pasemi_dma_free_chan(&txring->chan);
588
589 }
590
591 static void pasemi_mac_free_rx_buffers(struct pasemi_mac *mac)
592 {
593         struct pasemi_mac_rxring *rx = rx_ring(mac);
594         unsigned int i;
595         struct pasemi_mac_buffer *info;
596
597         for (i = 0; i < RX_RING_SIZE; i++) {
598                 info = &RX_DESC_INFO(rx, i);
599                 if (info->skb && info->dma) {
600                         pci_unmap_single(mac->dma_pdev,
601                                          info->dma,
602                                          info->skb->len,
603                                          PCI_DMA_FROMDEVICE);
604                         dev_kfree_skb_any(info->skb);
605                 }
606                 info->dma = 0;
607                 info->skb = NULL;
608         }
609
610         for (i = 0; i < RX_RING_SIZE; i++)
611                 RX_BUFF(rx, i) = 0;
612 }
613
614 static void pasemi_mac_free_rx_resources(struct pasemi_mac *mac)
615 {
616         pasemi_mac_free_rx_buffers(mac);
617
618         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
619                           rx_ring(mac)->buffers, rx_ring(mac)->buf_dma);
620
621         kfree(rx_ring(mac)->ring_info);
622         pasemi_dma_free_chan(&rx_ring(mac)->chan);
623         mac->rx = NULL;
624 }
625
626 static void pasemi_mac_replenish_rx_ring(const struct net_device *dev,
627                                          const int limit)
628 {
629         const struct pasemi_mac *mac = netdev_priv(dev);
630         struct pasemi_mac_rxring *rx = rx_ring(mac);
631         int fill, count;
632
633         if (limit <= 0)
634                 return;
635
636         fill = rx_ring(mac)->next_to_fill;
637         for (count = 0; count < limit; count++) {
638                 struct pasemi_mac_buffer *info = &RX_DESC_INFO(rx, fill);
639                 u64 *buff = &RX_BUFF(rx, fill);
640                 struct sk_buff *skb;
641                 dma_addr_t dma;
642
643                 /* Entry in use? */
644                 WARN_ON(*buff);
645
646                 skb = dev_alloc_skb(mac->bufsz);
647                 skb_reserve(skb, LOCAL_SKB_ALIGN);
648
649                 if (unlikely(!skb))
650                         break;
651
652                 dma = pci_map_single(mac->dma_pdev, skb->data,
653                                      mac->bufsz - LOCAL_SKB_ALIGN,
654                                      PCI_DMA_FROMDEVICE);
655
656                 if (unlikely(pci_dma_mapping_error(mac->dma_pdev, dma))) {
657                         dev_kfree_skb_irq(info->skb);
658                         break;
659                 }
660
661                 info->skb = skb;
662                 info->dma = dma;
663                 *buff = XCT_RXB_LEN(mac->bufsz) | XCT_RXB_ADDR(dma);
664                 fill++;
665         }
666
667         wmb();
668
669         write_dma_reg(PAS_DMA_RXINT_INCR(mac->dma_if), count);
670
671         rx_ring(mac)->next_to_fill = (rx_ring(mac)->next_to_fill + count) &
672                                 (RX_RING_SIZE - 1);
673 }
674
675 static void pasemi_mac_restart_rx_intr(const struct pasemi_mac *mac)
676 {
677         struct pasemi_mac_rxring *rx = rx_ring(mac);
678         unsigned int reg, pcnt;
679         /* Re-enable packet count interrupts: finally
680          * ack the packet count interrupt we got in rx_intr.
681          */
682
683         pcnt = *rx->chan.status & PAS_STATUS_PCNT_M;
684
685         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
686
687         if (*rx->chan.status & PAS_STATUS_TIMER)
688                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
689
690         write_iob_reg(PAS_IOB_DMA_RXCH_RESET(mac->rx->chan.chno), reg);
691 }
692
693 static void pasemi_mac_restart_tx_intr(const struct pasemi_mac *mac)
694 {
695         unsigned int reg, pcnt;
696
697         /* Re-enable packet count interrupts */
698         pcnt = *tx_ring(mac)->chan.status & PAS_STATUS_PCNT_M;
699
700         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
701
702         write_iob_reg(PAS_IOB_DMA_TXCH_RESET(tx_ring(mac)->chan.chno), reg);
703 }
704
705
706 static inline void pasemi_mac_rx_error(const struct pasemi_mac *mac,
707                                        const u64 macrx)
708 {
709         unsigned int rcmdsta, ccmdsta;
710         struct pasemi_dmachan *chan = &rx_ring(mac)->chan;
711
712         if (!netif_msg_rx_err(mac))
713                 return;
714
715         rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
716         ccmdsta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(chan->chno));
717
718         printk(KERN_ERR "pasemi_mac: rx error. macrx %016llx, rx status %llx\n",
719                 macrx, *chan->status);
720
721         printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n",
722                 rcmdsta, ccmdsta);
723 }
724
725 static inline void pasemi_mac_tx_error(const struct pasemi_mac *mac,
726                                        const u64 mactx)
727 {
728         unsigned int cmdsta;
729         struct pasemi_dmachan *chan = &tx_ring(mac)->chan;
730
731         if (!netif_msg_tx_err(mac))
732                 return;
733
734         cmdsta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(chan->chno));
735
736         printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016llx, "\
737                 "tx status 0x%016llx\n", mactx, *chan->status);
738
739         printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta);
740 }
741
742 static int pasemi_mac_clean_rx(struct pasemi_mac_rxring *rx,
743                                const int limit)
744 {
745         const struct pasemi_dmachan *chan = &rx->chan;
746         struct pasemi_mac *mac = rx->mac;
747         struct pci_dev *pdev = mac->dma_pdev;
748         unsigned int n;
749         int count, buf_index, tot_bytes, packets;
750         struct pasemi_mac_buffer *info;
751         struct sk_buff *skb;
752         unsigned int len;
753         u64 macrx, eval;
754         dma_addr_t dma;
755
756         tot_bytes = 0;
757         packets = 0;
758
759         spin_lock(&rx->lock);
760
761         n = rx->next_to_clean;
762
763         prefetch(&RX_DESC(rx, n));
764
765         for (count = 0; count < limit; count++) {
766                 macrx = RX_DESC(rx, n);
767                 prefetch(&RX_DESC(rx, n+4));
768
769                 if ((macrx & XCT_MACRX_E) ||
770                     (*chan->status & PAS_STATUS_ERROR))
771                         pasemi_mac_rx_error(mac, macrx);
772
773                 if (!(macrx & XCT_MACRX_O))
774                         break;
775
776                 info = NULL;
777
778                 BUG_ON(!(macrx & XCT_MACRX_RR_8BRES));
779
780                 eval = (RX_DESC(rx, n+1) & XCT_RXRES_8B_EVAL_M) >>
781                         XCT_RXRES_8B_EVAL_S;
782                 buf_index = eval-1;
783
784                 dma = (RX_DESC(rx, n+2) & XCT_PTR_ADDR_M);
785                 info = &RX_DESC_INFO(rx, buf_index);
786
787                 skb = info->skb;
788
789                 prefetch_skb(skb);
790
791                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
792
793                 pci_unmap_single(pdev, dma, mac->bufsz - LOCAL_SKB_ALIGN,
794                                  PCI_DMA_FROMDEVICE);
795
796                 if (macrx & XCT_MACRX_CRC) {
797                         /* CRC error flagged */
798                         mac->netdev->stats.rx_errors++;
799                         mac->netdev->stats.rx_crc_errors++;
800                         /* No need to free skb, it'll be reused */
801                         goto next;
802                 }
803
804                 info->skb = NULL;
805                 info->dma = 0;
806
807                 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
808                         skb->ip_summed = CHECKSUM_UNNECESSARY;
809                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
810                                            XCT_MACRX_CSUM_S;
811                 } else
812                         skb_checksum_none_assert(skb);
813
814                 packets++;
815                 tot_bytes += len;
816
817                 /* Don't include CRC */
818                 skb_put(skb, len-4);
819
820                 skb->protocol = eth_type_trans(skb, mac->netdev);
821                 lro_receive_skb(&mac->lro_mgr, skb, (void *)macrx);
822
823 next:
824                 RX_DESC(rx, n) = 0;
825                 RX_DESC(rx, n+1) = 0;
826
827                 /* Need to zero it out since hardware doesn't, since the
828                  * replenish loop uses it to tell when it's done.
829                  */
830                 RX_BUFF(rx, buf_index) = 0;
831
832                 n += 4;
833         }
834
835         if (n > RX_RING_SIZE) {
836                 /* Errata 5971 workaround: L2 target of headers */
837                 write_iob_reg(PAS_IOB_COM_PKTHDRCNT, 0);
838                 n &= (RX_RING_SIZE-1);
839         }
840
841         rx_ring(mac)->next_to_clean = n;
842
843         lro_flush_all(&mac->lro_mgr);
844
845         /* Increase is in number of 16-byte entries, and since each descriptor
846          * with an 8BRES takes up 3x8 bytes (padded to 4x8), increase with
847          * count*2.
848          */
849         write_dma_reg(PAS_DMA_RXCHAN_INCR(mac->rx->chan.chno), count << 1);
850
851         pasemi_mac_replenish_rx_ring(mac->netdev, count);
852
853         mac->netdev->stats.rx_bytes += tot_bytes;
854         mac->netdev->stats.rx_packets += packets;
855
856         spin_unlock(&rx_ring(mac)->lock);
857
858         return count;
859 }
860
861 /* Can't make this too large or we blow the kernel stack limits */
862 #define TX_CLEAN_BATCHSIZE (128/MAX_SKB_FRAGS)
863
864 static int pasemi_mac_clean_tx(struct pasemi_mac_txring *txring)
865 {
866         struct pasemi_dmachan *chan = &txring->chan;
867         struct pasemi_mac *mac = txring->mac;
868         int i, j;
869         unsigned int start, descr_count, buf_count, batch_limit;
870         unsigned int ring_limit;
871         unsigned int total_count;
872         unsigned long flags;
873         struct sk_buff *skbs[TX_CLEAN_BATCHSIZE];
874         dma_addr_t dmas[TX_CLEAN_BATCHSIZE][MAX_SKB_FRAGS+1];
875         int nf[TX_CLEAN_BATCHSIZE];
876         int nr_frags;
877
878         total_count = 0;
879         batch_limit = TX_CLEAN_BATCHSIZE;
880 restart:
881         spin_lock_irqsave(&txring->lock, flags);
882
883         start = txring->next_to_clean;
884         ring_limit = txring->next_to_fill;
885
886         prefetch(&TX_DESC_INFO(txring, start+1).skb);
887
888         /* Compensate for when fill has wrapped but clean has not */
889         if (start > ring_limit)
890                 ring_limit += TX_RING_SIZE;
891
892         buf_count = 0;
893         descr_count = 0;
894
895         for (i = start;
896              descr_count < batch_limit && i < ring_limit;
897              i += buf_count) {
898                 u64 mactx = TX_DESC(txring, i);
899                 struct sk_buff *skb;
900
901                 if ((mactx  & XCT_MACTX_E) ||
902                     (*chan->status & PAS_STATUS_ERROR))
903                         pasemi_mac_tx_error(mac, mactx);
904
905                 /* Skip over control descriptors */
906                 if (!(mactx & XCT_MACTX_LLEN_M)) {
907                         TX_DESC(txring, i) = 0;
908                         TX_DESC(txring, i+1) = 0;
909                         buf_count = 2;
910                         continue;
911                 }
912
913                 skb = TX_DESC_INFO(txring, i+1).skb;
914                 nr_frags = TX_DESC_INFO(txring, i).dma;
915
916                 if (unlikely(mactx & XCT_MACTX_O))
917                         /* Not yet transmitted */
918                         break;
919
920                 buf_count = 2 + nr_frags;
921                 /* Since we always fill with an even number of entries, make
922                  * sure we skip any unused one at the end as well.
923                  */
924                 if (buf_count & 1)
925                         buf_count++;
926
927                 for (j = 0; j <= nr_frags; j++)
928                         dmas[descr_count][j] = TX_DESC_INFO(txring, i+1+j).dma;
929
930                 skbs[descr_count] = skb;
931                 nf[descr_count] = nr_frags;
932
933                 TX_DESC(txring, i) = 0;
934                 TX_DESC(txring, i+1) = 0;
935
936                 descr_count++;
937         }
938         txring->next_to_clean = i & (TX_RING_SIZE-1);
939
940         spin_unlock_irqrestore(&txring->lock, flags);
941         netif_wake_queue(mac->netdev);
942
943         for (i = 0; i < descr_count; i++)
944                 pasemi_mac_unmap_tx_skb(mac, nf[i], skbs[i], dmas[i]);
945
946         total_count += descr_count;
947
948         /* If the batch was full, try to clean more */
949         if (descr_count == batch_limit)
950                 goto restart;
951
952         return total_count;
953 }
954
955
956 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
957 {
958         const struct pasemi_mac_rxring *rxring = data;
959         struct pasemi_mac *mac = rxring->mac;
960         const struct pasemi_dmachan *chan = &rxring->chan;
961         unsigned int reg;
962
963         if (!(*chan->status & PAS_STATUS_CAUSE_M))
964                 return IRQ_NONE;
965
966         /* Don't reset packet count so it won't fire again but clear
967          * all others.
968          */
969
970         reg = 0;
971         if (*chan->status & PAS_STATUS_SOFT)
972                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
973         if (*chan->status & PAS_STATUS_ERROR)
974                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
975
976         napi_schedule(&mac->napi);
977
978         write_iob_reg(PAS_IOB_DMA_RXCH_RESET(chan->chno), reg);
979
980         return IRQ_HANDLED;
981 }
982
983 #define TX_CLEAN_INTERVAL HZ
984
985 static void pasemi_mac_tx_timer(unsigned long data)
986 {
987         struct pasemi_mac_txring *txring = (struct pasemi_mac_txring *)data;
988         struct pasemi_mac *mac = txring->mac;
989
990         pasemi_mac_clean_tx(txring);
991
992         mod_timer(&txring->clean_timer, jiffies + TX_CLEAN_INTERVAL);
993
994         pasemi_mac_restart_tx_intr(mac);
995 }
996
997 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
998 {
999         struct pasemi_mac_txring *txring = data;
1000         const struct pasemi_dmachan *chan = &txring->chan;
1001         struct pasemi_mac *mac = txring->mac;
1002         unsigned int reg;
1003
1004         if (!(*chan->status & PAS_STATUS_CAUSE_M))
1005                 return IRQ_NONE;
1006
1007         reg = 0;
1008
1009         if (*chan->status & PAS_STATUS_SOFT)
1010                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
1011         if (*chan->status & PAS_STATUS_ERROR)
1012                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
1013
1014         mod_timer(&txring->clean_timer, jiffies + (TX_CLEAN_INTERVAL)*2);
1015
1016         napi_schedule(&mac->napi);
1017
1018         if (reg)
1019                 write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg);
1020
1021         return IRQ_HANDLED;
1022 }
1023
1024 static void pasemi_adjust_link(struct net_device *dev)
1025 {
1026         struct pasemi_mac *mac = netdev_priv(dev);
1027         int msg;
1028         unsigned int flags;
1029         unsigned int new_flags;
1030
1031         if (!mac->phydev->link) {
1032                 /* If no link, MAC speed settings don't matter. Just report
1033                  * link down and return.
1034                  */
1035                 if (mac->link && netif_msg_link(mac))
1036                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
1037
1038                 netif_carrier_off(dev);
1039                 pasemi_mac_intf_disable(mac);
1040                 mac->link = 0;
1041
1042                 return;
1043         } else {
1044                 pasemi_mac_intf_enable(mac);
1045                 netif_carrier_on(dev);
1046         }
1047
1048         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1049         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
1050                               PAS_MAC_CFG_PCFG_TSR_M);
1051
1052         if (!mac->phydev->duplex)
1053                 new_flags |= PAS_MAC_CFG_PCFG_HD;
1054
1055         switch (mac->phydev->speed) {
1056         case 1000:
1057                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
1058                              PAS_MAC_CFG_PCFG_TSR_1G;
1059                 break;
1060         case 100:
1061                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
1062                              PAS_MAC_CFG_PCFG_TSR_100M;
1063                 break;
1064         case 10:
1065                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
1066                              PAS_MAC_CFG_PCFG_TSR_10M;
1067                 break;
1068         default:
1069                 printk("Unsupported speed %d\n", mac->phydev->speed);
1070         }
1071
1072         /* Print on link or speed/duplex change */
1073         msg = mac->link != mac->phydev->link || flags != new_flags;
1074
1075         mac->duplex = mac->phydev->duplex;
1076         mac->speed = mac->phydev->speed;
1077         mac->link = mac->phydev->link;
1078
1079         if (new_flags != flags)
1080                 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
1081
1082         if (msg && netif_msg_link(mac))
1083                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
1084                        dev->name, mac->speed, mac->duplex ? "full" : "half");
1085 }
1086
1087 static int pasemi_mac_phy_init(struct net_device *dev)
1088 {
1089         struct pasemi_mac *mac = netdev_priv(dev);
1090         struct device_node *dn, *phy_dn;
1091         struct phy_device *phydev;
1092
1093         dn = pci_device_to_OF_node(mac->pdev);
1094         phy_dn = of_parse_phandle(dn, "phy-handle", 0);
1095         of_node_put(phy_dn);
1096
1097         mac->link = 0;
1098         mac->speed = 0;
1099         mac->duplex = -1;
1100
1101         phydev = of_phy_connect(dev, phy_dn, &pasemi_adjust_link, 0,
1102                                 PHY_INTERFACE_MODE_SGMII);
1103
1104         if (IS_ERR(phydev)) {
1105                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
1106                 return PTR_ERR(phydev);
1107         }
1108
1109         mac->phydev = phydev;
1110
1111         return 0;
1112 }
1113
1114
1115 static int pasemi_mac_open(struct net_device *dev)
1116 {
1117         struct pasemi_mac *mac = netdev_priv(dev);
1118         unsigned int flags;
1119         int i, ret;
1120
1121         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
1122                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
1123                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
1124
1125         write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
1126
1127         ret = pasemi_mac_setup_rx_resources(dev);
1128         if (ret)
1129                 goto out_rx_resources;
1130
1131         mac->tx = pasemi_mac_setup_tx_resources(dev);
1132
1133         if (!mac->tx)
1134                 goto out_tx_ring;
1135
1136         /* We might already have allocated rings in case mtu was changed
1137          * before interface was brought up.
1138          */
1139         if (dev->mtu > 1500 && !mac->num_cs) {
1140                 pasemi_mac_setup_csrings(mac);
1141                 if (!mac->num_cs)
1142                         goto out_tx_ring;
1143         }
1144
1145         /* Zero out rmon counters */
1146         for (i = 0; i < 32; i++)
1147                 write_mac_reg(mac, PAS_MAC_RMON(i), 0);
1148
1149         /* 0x3ff with 33MHz clock is about 31us */
1150         write_iob_reg(PAS_IOB_DMA_COM_TIMEOUTCFG,
1151                       PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0x3ff));
1152
1153         write_iob_reg(PAS_IOB_DMA_RXCH_CFG(mac->rx->chan.chno),
1154                       PAS_IOB_DMA_RXCH_CFG_CNTTH(256));
1155
1156         write_iob_reg(PAS_IOB_DMA_TXCH_CFG(mac->tx->chan.chno),
1157                       PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
1158
1159         write_mac_reg(mac, PAS_MAC_IPC_CHNL,
1160                       PAS_MAC_IPC_CHNL_DCHNO(mac->rx->chan.chno) |
1161                       PAS_MAC_IPC_CHNL_BCH(mac->rx->chan.chno));
1162
1163         /* enable rx if */
1164         write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1165                       PAS_DMA_RXINT_RCMDSTA_EN |
1166                       PAS_DMA_RXINT_RCMDSTA_DROPS_M |
1167                       PAS_DMA_RXINT_RCMDSTA_BP |
1168                       PAS_DMA_RXINT_RCMDSTA_OO |
1169                       PAS_DMA_RXINT_RCMDSTA_BT);
1170
1171         /* enable rx channel */
1172         pasemi_dma_start_chan(&rx_ring(mac)->chan, PAS_DMA_RXCHAN_CCMDSTA_DU |
1173                                                    PAS_DMA_RXCHAN_CCMDSTA_OD |
1174                                                    PAS_DMA_RXCHAN_CCMDSTA_FD |
1175                                                    PAS_DMA_RXCHAN_CCMDSTA_DT);
1176
1177         /* enable tx channel */
1178         pasemi_dma_start_chan(&tx_ring(mac)->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ |
1179                                                    PAS_DMA_TXCHAN_TCMDSTA_DB |
1180                                                    PAS_DMA_TXCHAN_TCMDSTA_DE |
1181                                                    PAS_DMA_TXCHAN_TCMDSTA_DA);
1182
1183         pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
1184
1185         write_dma_reg(PAS_DMA_RXCHAN_INCR(rx_ring(mac)->chan.chno),
1186                       RX_RING_SIZE>>1);
1187
1188         /* Clear out any residual packet count state from firmware */
1189         pasemi_mac_restart_rx_intr(mac);
1190         pasemi_mac_restart_tx_intr(mac);
1191
1192         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
1193
1194         if (mac->type == MAC_TYPE_GMAC)
1195                 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
1196         else
1197                 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
1198
1199         /* Enable interface in MAC */
1200         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1201
1202         ret = pasemi_mac_phy_init(dev);
1203         if (ret) {
1204                 /* Since we won't get link notification, just enable RX */
1205                 pasemi_mac_intf_enable(mac);
1206                 if (mac->type == MAC_TYPE_GMAC) {
1207                         /* Warn for missing PHY on SGMII (1Gig) ports */
1208                         dev_warn(&mac->pdev->dev,
1209                                  "PHY init failed: %d.\n", ret);
1210                         dev_warn(&mac->pdev->dev,
1211                                  "Defaulting to 1Gbit full duplex\n");
1212                 }
1213         }
1214
1215         netif_start_queue(dev);
1216         napi_enable(&mac->napi);
1217
1218         snprintf(mac->tx_irq_name, sizeof(mac->tx_irq_name), "%s tx",
1219                  dev->name);
1220
1221         ret = request_irq(mac->tx->chan.irq, pasemi_mac_tx_intr, IRQF_DISABLED,
1222                           mac->tx_irq_name, mac->tx);
1223         if (ret) {
1224                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
1225                         mac->tx->chan.irq, ret);
1226                 goto out_tx_int;
1227         }
1228
1229         snprintf(mac->rx_irq_name, sizeof(mac->rx_irq_name), "%s rx",
1230                  dev->name);
1231
1232         ret = request_irq(mac->rx->chan.irq, pasemi_mac_rx_intr, IRQF_DISABLED,
1233                           mac->rx_irq_name, mac->rx);
1234         if (ret) {
1235                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
1236                         mac->rx->chan.irq, ret);
1237                 goto out_rx_int;
1238         }
1239
1240         if (mac->phydev)
1241                 phy_start(mac->phydev);
1242
1243         init_timer(&mac->tx->clean_timer);
1244         mac->tx->clean_timer.function = pasemi_mac_tx_timer;
1245         mac->tx->clean_timer.data = (unsigned long)mac->tx;
1246         mac->tx->clean_timer.expires = jiffies+HZ;
1247         add_timer(&mac->tx->clean_timer);
1248
1249         return 0;
1250
1251 out_rx_int:
1252         free_irq(mac->tx->chan.irq, mac->tx);
1253 out_tx_int:
1254         napi_disable(&mac->napi);
1255         netif_stop_queue(dev);
1256 out_tx_ring:
1257         if (mac->tx)
1258                 pasemi_mac_free_tx_resources(mac);
1259         pasemi_mac_free_rx_resources(mac);
1260 out_rx_resources:
1261
1262         return ret;
1263 }
1264
1265 #define MAX_RETRIES 5000
1266
1267 static void pasemi_mac_pause_txchan(struct pasemi_mac *mac)
1268 {
1269         unsigned int sta, retries;
1270         int txch = tx_ring(mac)->chan.chno;
1271
1272         write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch),
1273                       PAS_DMA_TXCHAN_TCMDSTA_ST);
1274
1275         for (retries = 0; retries < MAX_RETRIES; retries++) {
1276                 sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch));
1277                 if (!(sta & PAS_DMA_TXCHAN_TCMDSTA_ACT))
1278                         break;
1279                 cond_resched();
1280         }
1281
1282         if (sta & PAS_DMA_TXCHAN_TCMDSTA_ACT)
1283                 dev_err(&mac->dma_pdev->dev,
1284                         "Failed to stop tx channel, tcmdsta %08x\n", sta);
1285
1286         write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), 0);
1287 }
1288
1289 static void pasemi_mac_pause_rxchan(struct pasemi_mac *mac)
1290 {
1291         unsigned int sta, retries;
1292         int rxch = rx_ring(mac)->chan.chno;
1293
1294         write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch),
1295                       PAS_DMA_RXCHAN_CCMDSTA_ST);
1296         for (retries = 0; retries < MAX_RETRIES; retries++) {
1297                 sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch));
1298                 if (!(sta & PAS_DMA_RXCHAN_CCMDSTA_ACT))
1299                         break;
1300                 cond_resched();
1301         }
1302
1303         if (sta & PAS_DMA_RXCHAN_CCMDSTA_ACT)
1304                 dev_err(&mac->dma_pdev->dev,
1305                         "Failed to stop rx channel, ccmdsta 08%x\n", sta);
1306         write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), 0);
1307 }
1308
1309 static void pasemi_mac_pause_rxint(struct pasemi_mac *mac)
1310 {
1311         unsigned int sta, retries;
1312
1313         write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1314                       PAS_DMA_RXINT_RCMDSTA_ST);
1315         for (retries = 0; retries < MAX_RETRIES; retries++) {
1316                 sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1317                 if (!(sta & PAS_DMA_RXINT_RCMDSTA_ACT))
1318                         break;
1319                 cond_resched();
1320         }
1321
1322         if (sta & PAS_DMA_RXINT_RCMDSTA_ACT)
1323                 dev_err(&mac->dma_pdev->dev,
1324                         "Failed to stop rx interface, rcmdsta %08x\n", sta);
1325         write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
1326 }
1327
1328 static int pasemi_mac_close(struct net_device *dev)
1329 {
1330         struct pasemi_mac *mac = netdev_priv(dev);
1331         unsigned int sta;
1332         int rxch, txch, i;
1333
1334         rxch = rx_ring(mac)->chan.chno;
1335         txch = tx_ring(mac)->chan.chno;
1336
1337         if (mac->phydev) {
1338                 phy_stop(mac->phydev);
1339                 phy_disconnect(mac->phydev);
1340         }
1341
1342         del_timer_sync(&mac->tx->clean_timer);
1343
1344         netif_stop_queue(dev);
1345         napi_disable(&mac->napi);
1346
1347         sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1348         if (sta & (PAS_DMA_RXINT_RCMDSTA_BP |
1349                       PAS_DMA_RXINT_RCMDSTA_OO |
1350                       PAS_DMA_RXINT_RCMDSTA_BT))
1351                 printk(KERN_DEBUG "pasemi_mac: rcmdsta error: 0x%08x\n", sta);
1352
1353         sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch));
1354         if (sta & (PAS_DMA_RXCHAN_CCMDSTA_DU |
1355                      PAS_DMA_RXCHAN_CCMDSTA_OD |
1356                      PAS_DMA_RXCHAN_CCMDSTA_FD |
1357                      PAS_DMA_RXCHAN_CCMDSTA_DT))
1358                 printk(KERN_DEBUG "pasemi_mac: ccmdsta error: 0x%08x\n", sta);
1359
1360         sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch));
1361         if (sta & (PAS_DMA_TXCHAN_TCMDSTA_SZ | PAS_DMA_TXCHAN_TCMDSTA_DB |
1362                       PAS_DMA_TXCHAN_TCMDSTA_DE | PAS_DMA_TXCHAN_TCMDSTA_DA))
1363                 printk(KERN_DEBUG "pasemi_mac: tcmdsta error: 0x%08x\n", sta);
1364
1365         /* Clean out any pending buffers */
1366         pasemi_mac_clean_tx(tx_ring(mac));
1367         pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE);
1368
1369         pasemi_mac_pause_txchan(mac);
1370         pasemi_mac_pause_rxint(mac);
1371         pasemi_mac_pause_rxchan(mac);
1372         pasemi_mac_intf_disable(mac);
1373
1374         free_irq(mac->tx->chan.irq, mac->tx);
1375         free_irq(mac->rx->chan.irq, mac->rx);
1376
1377         for (i = 0; i < mac->num_cs; i++) {
1378                 pasemi_mac_free_csring(mac->cs[i]);
1379                 mac->cs[i] = NULL;
1380         }
1381
1382         mac->num_cs = 0;
1383
1384         /* Free resources */
1385         pasemi_mac_free_rx_resources(mac);
1386         pasemi_mac_free_tx_resources(mac);
1387
1388         return 0;
1389 }
1390
1391 static void pasemi_mac_queue_csdesc(const struct sk_buff *skb,
1392                                     const dma_addr_t *map,
1393                                     const unsigned int *map_size,
1394                                     struct pasemi_mac_txring *txring,
1395                                     struct pasemi_mac_csring *csring)
1396 {
1397         u64 fund;
1398         dma_addr_t cs_dest;
1399         const int nh_off = skb_network_offset(skb);
1400         const int nh_len = skb_network_header_len(skb);
1401         const int nfrags = skb_shinfo(skb)->nr_frags;
1402         int cs_size, i, fill, hdr, cpyhdr, evt;
1403         dma_addr_t csdma;
1404
1405         fund = XCT_FUN_ST | XCT_FUN_RR_8BRES |
1406                XCT_FUN_O | XCT_FUN_FUN(csring->fun) |
1407                XCT_FUN_CRM_SIG | XCT_FUN_LLEN(skb->len - nh_off) |
1408                XCT_FUN_SHL(nh_len >> 2) | XCT_FUN_SE;
1409
1410         switch (ip_hdr(skb)->protocol) {
1411         case IPPROTO_TCP:
1412                 fund |= XCT_FUN_SIG_TCP4;
1413                 /* TCP checksum is 16 bytes into the header */
1414                 cs_dest = map[0] + skb_transport_offset(skb) + 16;
1415                 break;
1416         case IPPROTO_UDP:
1417                 fund |= XCT_FUN_SIG_UDP4;
1418                 /* UDP checksum is 6 bytes into the header */
1419                 cs_dest = map[0] + skb_transport_offset(skb) + 6;
1420                 break;
1421         default:
1422                 BUG();
1423         }
1424
1425         /* Do the checksum offloaded */
1426         fill = csring->next_to_fill;
1427         hdr = fill;
1428
1429         CS_DESC(csring, fill++) = fund;
1430         /* Room for 8BRES. Checksum result is really 2 bytes into it */
1431         csdma = csring->chan.ring_dma + (fill & (CS_RING_SIZE-1)) * 8 + 2;
1432         CS_DESC(csring, fill++) = 0;
1433
1434         CS_DESC(csring, fill) = XCT_PTR_LEN(map_size[0]-nh_off) | XCT_PTR_ADDR(map[0]+nh_off);
1435         for (i = 1; i <= nfrags; i++)
1436                 CS_DESC(csring, fill+i) = XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]);
1437
1438         fill += i;
1439         if (fill & 1)
1440                 fill++;
1441
1442         /* Copy the result into the TCP packet */
1443         cpyhdr = fill;
1444         CS_DESC(csring, fill++) = XCT_FUN_O | XCT_FUN_FUN(csring->fun) |
1445                                   XCT_FUN_LLEN(2) | XCT_FUN_SE;
1446         CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(cs_dest) | XCT_PTR_T;
1447         CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(csdma);
1448         fill++;
1449
1450         evt = !csring->last_event;
1451         csring->last_event = evt;
1452
1453         /* Event handshaking with MAC TX */
1454         CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1455                                   CTRL_CMD_ETYPE_SET | CTRL_CMD_REG(csring->events[evt]);
1456         CS_DESC(csring, fill++) = 0;
1457         CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1458                                   CTRL_CMD_ETYPE_WCLR | CTRL_CMD_REG(csring->events[!evt]);
1459         CS_DESC(csring, fill++) = 0;
1460         csring->next_to_fill = fill & (CS_RING_SIZE-1);
1461
1462         cs_size = fill - hdr;
1463         write_dma_reg(PAS_DMA_TXCHAN_INCR(csring->chan.chno), (cs_size) >> 1);
1464
1465         /* TX-side event handshaking */
1466         fill = txring->next_to_fill;
1467         TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1468                                   CTRL_CMD_ETYPE_WSET | CTRL_CMD_REG(csring->events[evt]);
1469         TX_DESC(txring, fill++) = 0;
1470         TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1471                                   CTRL_CMD_ETYPE_CLR | CTRL_CMD_REG(csring->events[!evt]);
1472         TX_DESC(txring, fill++) = 0;
1473         txring->next_to_fill = fill;
1474
1475         write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), 2);
1476 }
1477
1478 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
1479 {
1480         struct pasemi_mac * const mac = netdev_priv(dev);
1481         struct pasemi_mac_txring * const txring = tx_ring(mac);
1482         struct pasemi_mac_csring *csring;
1483         u64 dflags = 0;
1484         u64 mactx;
1485         dma_addr_t map[MAX_SKB_FRAGS+1];
1486         unsigned int map_size[MAX_SKB_FRAGS+1];
1487         unsigned long flags;
1488         int i, nfrags;
1489         int fill;
1490         const int nh_off = skb_network_offset(skb);
1491         const int nh_len = skb_network_header_len(skb);
1492
1493         prefetch(&txring->ring_info);
1494
1495         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_CRC_PAD;
1496
1497         nfrags = skb_shinfo(skb)->nr_frags;
1498
1499         map[0] = pci_map_single(mac->dma_pdev, skb->data, skb_headlen(skb),
1500                                 PCI_DMA_TODEVICE);
1501         map_size[0] = skb_headlen(skb);
1502         if (pci_dma_mapping_error(mac->dma_pdev, map[0]))
1503                 goto out_err_nolock;
1504
1505         for (i = 0; i < nfrags; i++) {
1506                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1507
1508                 map[i+1] = pci_map_page(mac->dma_pdev, frag->page,
1509                                         frag->page_offset, frag->size,
1510                                         PCI_DMA_TODEVICE);
1511                 map_size[i+1] = frag->size;
1512                 if (pci_dma_mapping_error(mac->dma_pdev, map[i+1])) {
1513                         nfrags = i;
1514                         goto out_err_nolock;
1515                 }
1516         }
1517
1518         if (skb->ip_summed == CHECKSUM_PARTIAL && skb->len <= 1540) {
1519                 switch (ip_hdr(skb)->protocol) {
1520                 case IPPROTO_TCP:
1521                         dflags |= XCT_MACTX_CSUM_TCP;
1522                         dflags |= XCT_MACTX_IPH(nh_len >> 2);
1523                         dflags |= XCT_MACTX_IPO(nh_off);
1524                         break;
1525                 case IPPROTO_UDP:
1526                         dflags |= XCT_MACTX_CSUM_UDP;
1527                         dflags |= XCT_MACTX_IPH(nh_len >> 2);
1528                         dflags |= XCT_MACTX_IPO(nh_off);
1529                         break;
1530                 default:
1531                         WARN_ON(1);
1532                 }
1533         }
1534
1535         mactx = dflags | XCT_MACTX_LLEN(skb->len);
1536
1537         spin_lock_irqsave(&txring->lock, flags);
1538
1539         /* Avoid stepping on the same cache line that the DMA controller
1540          * is currently about to send, so leave at least 8 words available.
1541          * Total free space needed is mactx + fragments + 8
1542          */
1543         if (RING_AVAIL(txring) < nfrags + 14) {
1544                 /* no room -- stop the queue and wait for tx intr */
1545                 netif_stop_queue(dev);
1546                 goto out_err;
1547         }
1548
1549         /* Queue up checksum + event descriptors, if needed */
1550         if (mac->num_cs && skb->ip_summed == CHECKSUM_PARTIAL && skb->len > 1540) {
1551                 csring = mac->cs[mac->last_cs];
1552                 mac->last_cs = (mac->last_cs + 1) % mac->num_cs;
1553
1554                 pasemi_mac_queue_csdesc(skb, map, map_size, txring, csring);
1555         }
1556
1557         fill = txring->next_to_fill;
1558         TX_DESC(txring, fill) = mactx;
1559         TX_DESC_INFO(txring, fill).dma = nfrags;
1560         fill++;
1561         TX_DESC_INFO(txring, fill).skb = skb;
1562         for (i = 0; i <= nfrags; i++) {
1563                 TX_DESC(txring, fill+i) =
1564                         XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]);
1565                 TX_DESC_INFO(txring, fill+i).dma = map[i];
1566         }
1567
1568         /* We have to add an even number of 8-byte entries to the ring
1569          * even if the last one is unused. That means always an odd number
1570          * of pointers + one mactx descriptor.
1571          */
1572         if (nfrags & 1)
1573                 nfrags++;
1574
1575         txring->next_to_fill = (fill + nfrags + 1) & (TX_RING_SIZE-1);
1576
1577         dev->stats.tx_packets++;
1578         dev->stats.tx_bytes += skb->len;
1579
1580         spin_unlock_irqrestore(&txring->lock, flags);
1581
1582         write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), (nfrags+2) >> 1);
1583
1584         return NETDEV_TX_OK;
1585
1586 out_err:
1587         spin_unlock_irqrestore(&txring->lock, flags);
1588 out_err_nolock:
1589         while (nfrags--)
1590                 pci_unmap_single(mac->dma_pdev, map[nfrags], map_size[nfrags],
1591                                  PCI_DMA_TODEVICE);
1592
1593         return NETDEV_TX_BUSY;
1594 }
1595
1596 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1597 {
1598         const struct pasemi_mac *mac = netdev_priv(dev);
1599         unsigned int flags;
1600
1601         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1602
1603         /* Set promiscuous */
1604         if (dev->flags & IFF_PROMISC)
1605                 flags |= PAS_MAC_CFG_PCFG_PR;
1606         else
1607                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1608
1609         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1610 }
1611
1612
1613 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1614 {
1615         struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1616         int pkts;
1617
1618         pasemi_mac_clean_tx(tx_ring(mac));
1619         pkts = pasemi_mac_clean_rx(rx_ring(mac), budget);
1620         if (pkts < budget) {
1621                 /* all done, no more packets present */
1622                 napi_complete(napi);
1623
1624                 pasemi_mac_restart_rx_intr(mac);
1625                 pasemi_mac_restart_tx_intr(mac);
1626         }
1627         return pkts;
1628 }
1629
1630 #ifdef CONFIG_NET_POLL_CONTROLLER
1631 /*
1632  * Polling 'interrupt' - used by things like netconsole to send skbs
1633  * without having to re-enable interrupts. It's not called while
1634  * the interrupt routine is executing.
1635  */
1636 static void pasemi_mac_netpoll(struct net_device *dev)
1637 {
1638         const struct pasemi_mac *mac = netdev_priv(dev);
1639
1640         disable_irq(mac->tx->chan.irq);
1641         pasemi_mac_tx_intr(mac->tx->chan.irq, mac->tx);
1642         enable_irq(mac->tx->chan.irq);
1643
1644         disable_irq(mac->rx->chan.irq);
1645         pasemi_mac_rx_intr(mac->rx->chan.irq, mac->rx);
1646         enable_irq(mac->rx->chan.irq);
1647 }
1648 #endif
1649
1650 static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu)
1651 {
1652         struct pasemi_mac *mac = netdev_priv(dev);
1653         unsigned int reg;
1654         unsigned int rcmdsta = 0;
1655         int running;
1656         int ret = 0;
1657
1658         if (new_mtu < PE_MIN_MTU || new_mtu > PE_MAX_MTU)
1659                 return -EINVAL;
1660
1661         running = netif_running(dev);
1662
1663         if (running) {
1664                 /* Need to stop the interface, clean out all already
1665                  * received buffers, free all unused buffers on the RX
1666                  * interface ring, then finally re-fill the rx ring with
1667                  * the new-size buffers and restart.
1668                  */
1669
1670                 napi_disable(&mac->napi);
1671                 netif_tx_disable(dev);
1672                 pasemi_mac_intf_disable(mac);
1673
1674                 rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1675                 pasemi_mac_pause_rxint(mac);
1676                 pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE);
1677                 pasemi_mac_free_rx_buffers(mac);
1678
1679         }
1680
1681         /* Setup checksum channels if large MTU and none already allocated */
1682         if (new_mtu > 1500 && !mac->num_cs) {
1683                 pasemi_mac_setup_csrings(mac);
1684                 if (!mac->num_cs) {
1685                         ret = -ENOMEM;
1686                         goto out;
1687                 }
1688         }
1689
1690         /* Change maxf, i.e. what size frames are accepted.
1691          * Need room for ethernet header and CRC word
1692          */
1693         reg = read_mac_reg(mac, PAS_MAC_CFG_MACCFG);
1694         reg &= ~PAS_MAC_CFG_MACCFG_MAXF_M;
1695         reg |= PAS_MAC_CFG_MACCFG_MAXF(new_mtu + ETH_HLEN + 4);
1696         write_mac_reg(mac, PAS_MAC_CFG_MACCFG, reg);
1697
1698         dev->mtu = new_mtu;
1699         /* MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
1700         mac->bufsz = new_mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;
1701
1702 out:
1703         if (running) {
1704                 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1705                               rcmdsta | PAS_DMA_RXINT_RCMDSTA_EN);
1706
1707                 rx_ring(mac)->next_to_fill = 0;
1708                 pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE-1);
1709
1710                 napi_enable(&mac->napi);
1711                 netif_start_queue(dev);
1712                 pasemi_mac_intf_enable(mac);
1713         }
1714
1715         return ret;
1716 }
1717
1718 static const struct net_device_ops pasemi_netdev_ops = {
1719         .ndo_open               = pasemi_mac_open,
1720         .ndo_stop               = pasemi_mac_close,
1721         .ndo_start_xmit         = pasemi_mac_start_tx,
1722         .ndo_set_multicast_list = pasemi_mac_set_rx_mode,
1723         .ndo_set_mac_address    = pasemi_mac_set_mac_addr,
1724         .ndo_change_mtu         = pasemi_mac_change_mtu,
1725         .ndo_validate_addr      = eth_validate_addr,
1726 #ifdef CONFIG_NET_POLL_CONTROLLER
1727         .ndo_poll_controller    = pasemi_mac_netpoll,
1728 #endif
1729 };
1730
1731 static int __devinit
1732 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1733 {
1734         struct net_device *dev;
1735         struct pasemi_mac *mac;
1736         int err, ret;
1737
1738         err = pci_enable_device(pdev);
1739         if (err)
1740                 return err;
1741
1742         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1743         if (dev == NULL) {
1744                 dev_err(&pdev->dev,
1745                         "pasemi_mac: Could not allocate ethernet device.\n");
1746                 err = -ENOMEM;
1747                 goto out_disable_device;
1748         }
1749
1750         pci_set_drvdata(pdev, dev);
1751         SET_NETDEV_DEV(dev, &pdev->dev);
1752
1753         mac = netdev_priv(dev);
1754
1755         mac->pdev = pdev;
1756         mac->netdev = dev;
1757
1758         netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1759
1760         dev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX | NETIF_F_SG |
1761                         NETIF_F_HIGHDMA | NETIF_F_GSO;
1762
1763         mac->lro_mgr.max_aggr = LRO_MAX_AGGR;
1764         mac->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1765         mac->lro_mgr.lro_arr = mac->lro_desc;
1766         mac->lro_mgr.get_skb_header = get_skb_hdr;
1767         mac->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1768         mac->lro_mgr.dev = mac->netdev;
1769         mac->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1770         mac->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1771
1772
1773         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1774         if (!mac->dma_pdev) {
1775                 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1776                 err = -ENODEV;
1777                 goto out;
1778         }
1779
1780         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1781         if (!mac->iob_pdev) {
1782                 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1783                 err = -ENODEV;
1784                 goto out;
1785         }
1786
1787         /* get mac addr from device tree */
1788         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1789                 err = -ENODEV;
1790                 goto out;
1791         }
1792         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1793
1794         ret = mac_to_intf(mac);
1795         if (ret < 0) {
1796                 dev_err(&mac->pdev->dev, "Can't map DMA interface\n");
1797                 err = -ENODEV;
1798                 goto out;
1799         }
1800         mac->dma_if = ret;
1801
1802         switch (pdev->device) {
1803         case 0xa005:
1804                 mac->type = MAC_TYPE_GMAC;
1805                 break;
1806         case 0xa006:
1807                 mac->type = MAC_TYPE_XAUI;
1808                 break;
1809         default:
1810                 err = -ENODEV;
1811                 goto out;
1812         }
1813
1814         dev->netdev_ops = &pasemi_netdev_ops;
1815         dev->mtu = PE_DEF_MTU;
1816         /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
1817         mac->bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;
1818
1819         dev->ethtool_ops = &pasemi_mac_ethtool_ops;
1820
1821         if (err)
1822                 goto out;
1823
1824         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1825
1826         /* Enable most messages by default */
1827         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1828
1829         err = register_netdev(dev);
1830
1831         if (err) {
1832                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1833                         err);
1834                 goto out;
1835         } else if netif_msg_probe(mac)
1836                 printk(KERN_INFO "%s: PA Semi %s: intf %d, hw addr %pM\n",
1837                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1838                        mac->dma_if, dev->dev_addr);
1839
1840         return err;
1841
1842 out:
1843         if (mac->iob_pdev)
1844                 pci_dev_put(mac->iob_pdev);
1845         if (mac->dma_pdev)
1846                 pci_dev_put(mac->dma_pdev);
1847
1848         free_netdev(dev);
1849 out_disable_device:
1850         pci_disable_device(pdev);
1851         return err;
1852
1853 }
1854
1855 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1856 {
1857         struct net_device *netdev = pci_get_drvdata(pdev);
1858         struct pasemi_mac *mac;
1859
1860         if (!netdev)
1861                 return;
1862
1863         mac = netdev_priv(netdev);
1864
1865         unregister_netdev(netdev);
1866
1867         pci_disable_device(pdev);
1868         pci_dev_put(mac->dma_pdev);
1869         pci_dev_put(mac->iob_pdev);
1870
1871         pasemi_dma_free_chan(&mac->tx->chan);
1872         pasemi_dma_free_chan(&mac->rx->chan);
1873
1874         pci_set_drvdata(pdev, NULL);
1875         free_netdev(netdev);
1876 }
1877
1878 static DEFINE_PCI_DEVICE_TABLE(pasemi_mac_pci_tbl) = {
1879         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1880         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1881         { },
1882 };
1883
1884 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1885
1886 static struct pci_driver pasemi_mac_driver = {
1887         .name           = "pasemi_mac",
1888         .id_table       = pasemi_mac_pci_tbl,
1889         .probe          = pasemi_mac_probe,
1890         .remove         = __devexit_p(pasemi_mac_remove),
1891 };
1892
1893 static void __exit pasemi_mac_cleanup_module(void)
1894 {
1895         pci_unregister_driver(&pasemi_mac_driver);
1896 }
1897
1898 int pasemi_mac_init_module(void)
1899 {
1900         int err;
1901
1902         err = pasemi_dma_init();
1903         if (err)
1904                 return err;
1905
1906         return pci_register_driver(&pasemi_mac_driver);
1907 }
1908
1909 module_init(pasemi_mac_init_module);
1910 module_exit(pasemi_mac_cleanup_module);