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[NET]: Make NAPI polling independent of struct net_device objects.
[GitHub/mt8127/android_kernel_alcatel_ttab.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/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 BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
73
74 MODULE_LICENSE("GPL");
75 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
76 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
77
78 static int debug = -1; /* -1 == use DEFAULT_MSG_ENABLE as value */
79 module_param(debug, int, 0);
80 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
81
82 static struct pasdma_status *dma_status;
83
84 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
85 {
86 struct pci_dev *pdev = mac->pdev;
87 struct device_node *dn = pci_device_to_OF_node(pdev);
88 int len;
89 const u8 *maddr;
90 u8 addr[6];
91
92 if (!dn) {
93 dev_dbg(&pdev->dev,
94 "No device node for mac, not configuring\n");
95 return -ENOENT;
96 }
97
98 maddr = of_get_property(dn, "local-mac-address", &len);
99
100 if (maddr && len == 6) {
101 memcpy(mac->mac_addr, maddr, 6);
102 return 0;
103 }
104
105 /* Some old versions of firmware mistakenly uses mac-address
106 * (and as a string) instead of a byte array in local-mac-address.
107 */
108
109 if (maddr == NULL)
110 maddr = of_get_property(dn, "mac-address", NULL);
111
112 if (maddr == NULL) {
113 dev_warn(&pdev->dev,
114 "no mac address in device tree, not configuring\n");
115 return -ENOENT;
116 }
117
118
119 if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
120 &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
121 dev_warn(&pdev->dev,
122 "can't parse mac address, not configuring\n");
123 return -EINVAL;
124 }
125
126 memcpy(mac->mac_addr, addr, 6);
127
128 return 0;
129 }
130
131 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
132 {
133 struct pasemi_mac_rxring *ring;
134 struct pasemi_mac *mac = netdev_priv(dev);
135 int chan_id = mac->dma_rxch;
136
137 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
138
139 if (!ring)
140 goto out_ring;
141
142 spin_lock_init(&ring->lock);
143
144 ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
145 RX_RING_SIZE, GFP_KERNEL);
146
147 if (!ring->desc_info)
148 goto out_desc_info;
149
150 /* Allocate descriptors */
151 ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
152 RX_RING_SIZE *
153 sizeof(struct pas_dma_xct_descr),
154 &ring->dma, GFP_KERNEL);
155
156 if (!ring->desc)
157 goto out_desc;
158
159 memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
160
161 ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
162 RX_RING_SIZE * sizeof(u64),
163 &ring->buf_dma, GFP_KERNEL);
164 if (!ring->buffers)
165 goto out_buffers;
166
167 memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
168
169 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEL(chan_id),
170 PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
171
172 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEU(chan_id),
173 PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
174 PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
175
176 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_CFG(chan_id),
177 PAS_DMA_RXCHAN_CFG_HBU(1));
178
179 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEL(mac->dma_if),
180 PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
181
182 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEU(mac->dma_if),
183 PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
184 PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
185
186 ring->next_to_fill = 0;
187 ring->next_to_clean = 0;
188
189 snprintf(ring->irq_name, sizeof(ring->irq_name),
190 "%s rx", dev->name);
191 mac->rx = ring;
192
193 return 0;
194
195 out_buffers:
196 dma_free_coherent(&mac->dma_pdev->dev,
197 RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
198 mac->rx->desc, mac->rx->dma);
199 out_desc:
200 kfree(ring->desc_info);
201 out_desc_info:
202 kfree(ring);
203 out_ring:
204 return -ENOMEM;
205 }
206
207
208 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
209 {
210 struct pasemi_mac *mac = netdev_priv(dev);
211 u32 val;
212 int chan_id = mac->dma_txch;
213 struct pasemi_mac_txring *ring;
214
215 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
216 if (!ring)
217 goto out_ring;
218
219 spin_lock_init(&ring->lock);
220
221 ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
222 TX_RING_SIZE, GFP_KERNEL);
223 if (!ring->desc_info)
224 goto out_desc_info;
225
226 /* Allocate descriptors */
227 ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
228 TX_RING_SIZE *
229 sizeof(struct pas_dma_xct_descr),
230 &ring->dma, GFP_KERNEL);
231 if (!ring->desc)
232 goto out_desc;
233
234 memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
235
236 pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEL(chan_id),
237 PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
238 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
239 val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
240
241 pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEU(chan_id), val);
242
243 pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_CFG(chan_id),
244 PAS_DMA_TXCHAN_CFG_TY_IFACE |
245 PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
246 PAS_DMA_TXCHAN_CFG_UP |
247 PAS_DMA_TXCHAN_CFG_WT(2));
248
249 ring->next_to_use = 0;
250 ring->next_to_clean = 0;
251
252 snprintf(ring->irq_name, sizeof(ring->irq_name),
253 "%s tx", dev->name);
254 mac->tx = ring;
255
256 return 0;
257
258 out_desc:
259 kfree(ring->desc_info);
260 out_desc_info:
261 kfree(ring);
262 out_ring:
263 return -ENOMEM;
264 }
265
266 static void pasemi_mac_free_tx_resources(struct net_device *dev)
267 {
268 struct pasemi_mac *mac = netdev_priv(dev);
269 unsigned int i;
270 struct pasemi_mac_buffer *info;
271 struct pas_dma_xct_descr *dp;
272
273 for (i = 0; i < TX_RING_SIZE; i++) {
274 info = &TX_DESC_INFO(mac, i);
275 dp = &TX_DESC(mac, i);
276 if (info->dma) {
277 if (info->skb) {
278 pci_unmap_single(mac->dma_pdev,
279 info->dma,
280 info->skb->len,
281 PCI_DMA_TODEVICE);
282 dev_kfree_skb_any(info->skb);
283 }
284 info->dma = 0;
285 info->skb = NULL;
286 dp->mactx = 0;
287 dp->ptr = 0;
288 }
289 }
290
291 dma_free_coherent(&mac->dma_pdev->dev,
292 TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
293 mac->tx->desc, mac->tx->dma);
294
295 kfree(mac->tx->desc_info);
296 kfree(mac->tx);
297 mac->tx = NULL;
298 }
299
300 static void pasemi_mac_free_rx_resources(struct net_device *dev)
301 {
302 struct pasemi_mac *mac = netdev_priv(dev);
303 unsigned int i;
304 struct pasemi_mac_buffer *info;
305 struct pas_dma_xct_descr *dp;
306
307 for (i = 0; i < RX_RING_SIZE; i++) {
308 info = &RX_DESC_INFO(mac, i);
309 dp = &RX_DESC(mac, i);
310 if (info->skb) {
311 if (info->dma) {
312 pci_unmap_single(mac->dma_pdev,
313 info->dma,
314 info->skb->len,
315 PCI_DMA_FROMDEVICE);
316 dev_kfree_skb_any(info->skb);
317 }
318 info->dma = 0;
319 info->skb = NULL;
320 dp->macrx = 0;
321 dp->ptr = 0;
322 }
323 }
324
325 dma_free_coherent(&mac->dma_pdev->dev,
326 RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
327 mac->rx->desc, mac->rx->dma);
328
329 dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
330 mac->rx->buffers, mac->rx->buf_dma);
331
332 kfree(mac->rx->desc_info);
333 kfree(mac->rx);
334 mac->rx = NULL;
335 }
336
337 static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
338 {
339 struct pasemi_mac *mac = netdev_priv(dev);
340 unsigned int i;
341 int start = mac->rx->next_to_fill;
342 unsigned int limit, count;
343
344 limit = (mac->rx->next_to_clean + RX_RING_SIZE -
345 mac->rx->next_to_fill) & (RX_RING_SIZE - 1);
346
347 /* Check to see if we're doing first-time setup */
348 if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0))
349 limit = RX_RING_SIZE;
350
351 if (limit <= 0)
352 return;
353
354 i = start;
355 for (count = limit; count; count--) {
356 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
357 u64 *buff = &RX_BUFF(mac, i);
358 struct sk_buff *skb;
359 dma_addr_t dma;
360
361 /* skb might still be in there for recycle on short receives */
362 if (info->skb)
363 skb = info->skb;
364 else
365 skb = dev_alloc_skb(BUF_SIZE);
366
367 if (unlikely(!skb))
368 break;
369
370 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
371 PCI_DMA_FROMDEVICE);
372
373 if (unlikely(dma_mapping_error(dma))) {
374 dev_kfree_skb_irq(info->skb);
375 break;
376 }
377
378 info->skb = skb;
379 info->dma = dma;
380 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
381 i++;
382 }
383
384 wmb();
385
386 pci_write_config_dword(mac->dma_pdev,
387 PAS_DMA_RXCHAN_INCR(mac->dma_rxch),
388 limit - count);
389 pci_write_config_dword(mac->dma_pdev,
390 PAS_DMA_RXINT_INCR(mac->dma_if),
391 limit - count);
392
393 mac->rx->next_to_fill += limit - count;
394 }
395
396 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
397 {
398 unsigned int reg, pcnt;
399 /* Re-enable packet count interrupts: finally
400 * ack the packet count interrupt we got in rx_intr.
401 */
402
403 pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
404
405 reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
406
407 pci_write_config_dword(mac->iob_pdev,
408 PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch),
409 reg);
410 }
411
412 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
413 {
414 unsigned int reg, pcnt;
415
416 /* Re-enable packet count interrupts */
417 pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
418
419 reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
420
421 pci_write_config_dword(mac->iob_pdev,
422 PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
423 }
424
425
426 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
427 {
428 unsigned int n;
429 int count;
430 struct pas_dma_xct_descr *dp;
431 struct pasemi_mac_buffer *info;
432 struct sk_buff *skb;
433 unsigned int i, len;
434 u64 macrx;
435 dma_addr_t dma;
436
437 spin_lock(&mac->rx->lock);
438
439 n = mac->rx->next_to_clean;
440
441 for (count = limit; count; count--) {
442
443 rmb();
444
445 dp = &RX_DESC(mac, n);
446 macrx = dp->macrx;
447
448 if (!(macrx & XCT_MACRX_O))
449 break;
450
451
452 info = NULL;
453
454 /* We have to scan for our skb since there's no way
455 * to back-map them from the descriptor, and if we
456 * have several receive channels then they might not
457 * show up in the same order as they were put on the
458 * interface ring.
459 */
460
461 dma = (dp->ptr & XCT_PTR_ADDR_M);
462 for (i = n; i < (n + RX_RING_SIZE); i++) {
463 info = &RX_DESC_INFO(mac, i);
464 if (info->dma == dma)
465 break;
466 }
467
468 skb = info->skb;
469 info->dma = 0;
470
471 pci_unmap_single(mac->dma_pdev, dma, skb->len,
472 PCI_DMA_FROMDEVICE);
473
474 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
475
476 if (len < 256) {
477 struct sk_buff *new_skb =
478 netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
479 if (new_skb) {
480 skb_reserve(new_skb, NET_IP_ALIGN);
481 memcpy(new_skb->data - NET_IP_ALIGN,
482 skb->data - NET_IP_ALIGN,
483 len + NET_IP_ALIGN);
484 /* save the skb in buffer_info as good */
485 skb = new_skb;
486 }
487 /* else just continue with the old one */
488 } else
489 info->skb = NULL;
490
491 skb_put(skb, len);
492
493 skb->protocol = eth_type_trans(skb, mac->netdev);
494
495 if ((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK) {
496 skb->ip_summed = CHECKSUM_COMPLETE;
497 skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
498 XCT_MACRX_CSUM_S;
499 } else
500 skb->ip_summed = CHECKSUM_NONE;
501
502 mac->stats.rx_bytes += len;
503 mac->stats.rx_packets++;
504
505 netif_receive_skb(skb);
506
507 dp->ptr = 0;
508 dp->macrx = 0;
509
510 n++;
511 }
512
513 mac->rx->next_to_clean += limit - count;
514 pasemi_mac_replenish_rx_ring(mac->netdev);
515
516 spin_unlock(&mac->rx->lock);
517
518 return count;
519 }
520
521 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
522 {
523 int i;
524 struct pasemi_mac_buffer *info;
525 struct pas_dma_xct_descr *dp;
526 int start, count;
527 int flags;
528
529 spin_lock_irqsave(&mac->tx->lock, flags);
530
531 start = mac->tx->next_to_clean;
532 count = 0;
533
534 for (i = start; i < mac->tx->next_to_use; i++) {
535 dp = &TX_DESC(mac, i);
536 if (!dp || (dp->mactx & XCT_MACTX_O))
537 break;
538
539 count++;
540
541 info = &TX_DESC_INFO(mac, i);
542
543 pci_unmap_single(mac->dma_pdev, info->dma,
544 info->skb->len, PCI_DMA_TODEVICE);
545 dev_kfree_skb_irq(info->skb);
546
547 info->skb = NULL;
548 info->dma = 0;
549 dp->mactx = 0;
550 dp->ptr = 0;
551 }
552 mac->tx->next_to_clean += count;
553 spin_unlock_irqrestore(&mac->tx->lock, flags);
554
555 netif_wake_queue(mac->netdev);
556
557 return count;
558 }
559
560
561 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
562 {
563 struct net_device *dev = data;
564 struct pasemi_mac *mac = netdev_priv(dev);
565 unsigned int reg;
566
567 if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
568 return IRQ_NONE;
569
570 if (*mac->rx_status & PAS_STATUS_ERROR)
571 printk("rx_status reported error\n");
572
573 /* Don't reset packet count so it won't fire again but clear
574 * all others.
575 */
576
577 pci_read_config_dword(mac->dma_pdev, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), &reg);
578
579 reg = 0;
580 if (*mac->rx_status & PAS_STATUS_SOFT)
581 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
582 if (*mac->rx_status & PAS_STATUS_ERROR)
583 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
584 if (*mac->rx_status & PAS_STATUS_TIMER)
585 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
586
587 netif_rx_schedule(dev, &mac->napi);
588
589 pci_write_config_dword(mac->iob_pdev,
590 PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
591
592
593 return IRQ_HANDLED;
594 }
595
596 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
597 {
598 struct net_device *dev = data;
599 struct pasemi_mac *mac = netdev_priv(dev);
600 unsigned int reg, pcnt;
601
602 if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
603 return IRQ_NONE;
604
605 pasemi_mac_clean_tx(mac);
606
607 pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
608
609 reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
610
611 if (*mac->tx_status & PAS_STATUS_SOFT)
612 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
613 if (*mac->tx_status & PAS_STATUS_ERROR)
614 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
615
616 pci_write_config_dword(mac->iob_pdev,
617 PAS_IOB_DMA_TXCH_RESET(mac->dma_txch),
618 reg);
619
620 return IRQ_HANDLED;
621 }
622
623 static void pasemi_adjust_link(struct net_device *dev)
624 {
625 struct pasemi_mac *mac = netdev_priv(dev);
626 int msg;
627 unsigned int flags;
628 unsigned int new_flags;
629
630 if (!mac->phydev->link) {
631 /* If no link, MAC speed settings don't matter. Just report
632 * link down and return.
633 */
634 if (mac->link && netif_msg_link(mac))
635 printk(KERN_INFO "%s: Link is down.\n", dev->name);
636
637 netif_carrier_off(dev);
638 mac->link = 0;
639
640 return;
641 } else
642 netif_carrier_on(dev);
643
644 pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
645 new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
646 PAS_MAC_CFG_PCFG_TSR_M);
647
648 if (!mac->phydev->duplex)
649 new_flags |= PAS_MAC_CFG_PCFG_HD;
650
651 switch (mac->phydev->speed) {
652 case 1000:
653 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
654 PAS_MAC_CFG_PCFG_TSR_1G;
655 break;
656 case 100:
657 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
658 PAS_MAC_CFG_PCFG_TSR_100M;
659 break;
660 case 10:
661 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
662 PAS_MAC_CFG_PCFG_TSR_10M;
663 break;
664 default:
665 printk("Unsupported speed %d\n", mac->phydev->speed);
666 }
667
668 /* Print on link or speed/duplex change */
669 msg = mac->link != mac->phydev->link || flags != new_flags;
670
671 mac->duplex = mac->phydev->duplex;
672 mac->speed = mac->phydev->speed;
673 mac->link = mac->phydev->link;
674
675 if (new_flags != flags)
676 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, new_flags);
677
678 if (msg && netif_msg_link(mac))
679 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
680 dev->name, mac->speed, mac->duplex ? "full" : "half");
681 }
682
683 static int pasemi_mac_phy_init(struct net_device *dev)
684 {
685 struct pasemi_mac *mac = netdev_priv(dev);
686 struct device_node *dn, *phy_dn;
687 struct phy_device *phydev;
688 unsigned int phy_id;
689 const phandle *ph;
690 const unsigned int *prop;
691 struct resource r;
692 int ret;
693
694 dn = pci_device_to_OF_node(mac->pdev);
695 ph = of_get_property(dn, "phy-handle", NULL);
696 if (!ph)
697 return -ENODEV;
698 phy_dn = of_find_node_by_phandle(*ph);
699
700 prop = of_get_property(phy_dn, "reg", NULL);
701 ret = of_address_to_resource(phy_dn->parent, 0, &r);
702 if (ret)
703 goto err;
704
705 phy_id = *prop;
706 snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
707
708 of_node_put(phy_dn);
709
710 mac->link = 0;
711 mac->speed = 0;
712 mac->duplex = -1;
713
714 phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
715
716 if (IS_ERR(phydev)) {
717 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
718 return PTR_ERR(phydev);
719 }
720
721 mac->phydev = phydev;
722
723 return 0;
724
725 err:
726 of_node_put(phy_dn);
727 return -ENODEV;
728 }
729
730
731 static int pasemi_mac_open(struct net_device *dev)
732 {
733 struct pasemi_mac *mac = netdev_priv(dev);
734 int base_irq;
735 unsigned int flags;
736 int ret;
737
738 /* enable rx section */
739 pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_RXCMD,
740 PAS_DMA_COM_RXCMD_EN);
741
742 /* enable tx section */
743 pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_TXCMD,
744 PAS_DMA_COM_TXCMD_EN);
745
746 flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
747 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
748 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
749
750 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_TXP, flags);
751
752 flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
753 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
754
755 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
756
757 pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
758 PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
759
760 pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
761 PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
762
763 /* Clear out any residual packet count state from firmware */
764 pasemi_mac_restart_rx_intr(mac);
765 pasemi_mac_restart_tx_intr(mac);
766
767 /* 0xffffff is max value, about 16ms */
768 pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG,
769 PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
770
771 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
772
773 ret = pasemi_mac_setup_rx_resources(dev);
774 if (ret)
775 goto out_rx_resources;
776
777 ret = pasemi_mac_setup_tx_resources(dev);
778 if (ret)
779 goto out_tx_resources;
780
781 pci_write_config_dword(mac->pdev, PAS_MAC_IPC_CHNL,
782 PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
783 PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
784
785 /* enable rx if */
786 pci_write_config_dword(mac->dma_pdev,
787 PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
788 PAS_DMA_RXINT_RCMDSTA_EN);
789
790 /* enable rx channel */
791 pci_write_config_dword(mac->dma_pdev,
792 PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
793 PAS_DMA_RXCHAN_CCMDSTA_EN |
794 PAS_DMA_RXCHAN_CCMDSTA_DU);
795
796 /* enable tx channel */
797 pci_write_config_dword(mac->dma_pdev,
798 PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
799 PAS_DMA_TXCHAN_TCMDSTA_EN);
800
801 pasemi_mac_replenish_rx_ring(dev);
802
803 ret = pasemi_mac_phy_init(dev);
804 /* Some configs don't have PHYs (XAUI etc), so don't complain about
805 * failed init due to -ENODEV.
806 */
807 if (ret && ret != -ENODEV)
808 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
809
810 netif_start_queue(dev);
811 napi_enable(&mac->napi);
812
813 /* Interrupts are a bit different for our DMA controller: While
814 * it's got one a regular PCI device header, the interrupt there
815 * is really the base of the range it's using. Each tx and rx
816 * channel has it's own interrupt source.
817 */
818
819 base_irq = virq_to_hw(mac->dma_pdev->irq);
820
821 mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
822 mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
823
824 ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
825 mac->tx->irq_name, dev);
826 if (ret) {
827 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
828 base_irq + mac->dma_txch, ret);
829 goto out_tx_int;
830 }
831
832 ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
833 mac->rx->irq_name, dev);
834 if (ret) {
835 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
836 base_irq + 20 + mac->dma_rxch, ret);
837 goto out_rx_int;
838 }
839
840 if (mac->phydev)
841 phy_start(mac->phydev);
842
843 return 0;
844
845 out_rx_int:
846 free_irq(mac->tx_irq, dev);
847 out_tx_int:
848 napi_disable(&mac->napi);
849 netif_stop_queue(dev);
850 pasemi_mac_free_tx_resources(dev);
851 out_tx_resources:
852 pasemi_mac_free_rx_resources(dev);
853 out_rx_resources:
854
855 return ret;
856 }
857
858 #define MAX_RETRIES 5000
859
860 static int pasemi_mac_close(struct net_device *dev)
861 {
862 struct pasemi_mac *mac = netdev_priv(dev);
863 unsigned int stat;
864 int retries;
865
866 if (mac->phydev) {
867 phy_stop(mac->phydev);
868 phy_disconnect(mac->phydev);
869 }
870
871 netif_stop_queue(dev);
872 napi_disable(&mac->napi);
873
874 /* Clean out any pending buffers */
875 pasemi_mac_clean_tx(mac);
876 pasemi_mac_clean_rx(mac, RX_RING_SIZE);
877
878 /* Disable interface */
879 pci_write_config_dword(mac->dma_pdev,
880 PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
881 PAS_DMA_TXCHAN_TCMDSTA_ST);
882 pci_write_config_dword(mac->dma_pdev,
883 PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
884 PAS_DMA_RXINT_RCMDSTA_ST);
885 pci_write_config_dword(mac->dma_pdev,
886 PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
887 PAS_DMA_RXCHAN_CCMDSTA_ST);
888
889 for (retries = 0; retries < MAX_RETRIES; retries++) {
890 pci_read_config_dword(mac->dma_pdev,
891 PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
892 &stat);
893 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
894 break;
895 cond_resched();
896 }
897
898 if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
899 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
900
901 for (retries = 0; retries < MAX_RETRIES; retries++) {
902 pci_read_config_dword(mac->dma_pdev,
903 PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
904 &stat);
905 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
906 break;
907 cond_resched();
908 }
909
910 if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
911 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
912
913 for (retries = 0; retries < MAX_RETRIES; retries++) {
914 pci_read_config_dword(mac->dma_pdev,
915 PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
916 &stat);
917 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
918 break;
919 cond_resched();
920 }
921
922 if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
923 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
924
925 /* Then, disable the channel. This must be done separately from
926 * stopping, since you can't disable when active.
927 */
928
929 pci_write_config_dword(mac->dma_pdev,
930 PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
931 pci_write_config_dword(mac->dma_pdev,
932 PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
933 pci_write_config_dword(mac->dma_pdev,
934 PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
935
936 free_irq(mac->tx_irq, dev);
937 free_irq(mac->rx_irq, dev);
938
939 /* Free resources */
940 pasemi_mac_free_rx_resources(dev);
941 pasemi_mac_free_tx_resources(dev);
942
943 return 0;
944 }
945
946 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
947 {
948 struct pasemi_mac *mac = netdev_priv(dev);
949 struct pasemi_mac_txring *txring;
950 struct pasemi_mac_buffer *info;
951 struct pas_dma_xct_descr *dp;
952 u64 dflags;
953 dma_addr_t map;
954 int flags;
955
956 dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
957
958 if (skb->ip_summed == CHECKSUM_PARTIAL) {
959 const unsigned char *nh = skb_network_header(skb);
960
961 switch (ip_hdr(skb)->protocol) {
962 case IPPROTO_TCP:
963 dflags |= XCT_MACTX_CSUM_TCP;
964 dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
965 dflags |= XCT_MACTX_IPO(nh - skb->data);
966 break;
967 case IPPROTO_UDP:
968 dflags |= XCT_MACTX_CSUM_UDP;
969 dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
970 dflags |= XCT_MACTX_IPO(nh - skb->data);
971 break;
972 }
973 }
974
975 map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
976
977 if (dma_mapping_error(map))
978 return NETDEV_TX_BUSY;
979
980 txring = mac->tx;
981
982 spin_lock_irqsave(&txring->lock, flags);
983
984 if (txring->next_to_clean - txring->next_to_use == TX_RING_SIZE) {
985 spin_unlock_irqrestore(&txring->lock, flags);
986 pasemi_mac_clean_tx(mac);
987 pasemi_mac_restart_tx_intr(mac);
988 spin_lock_irqsave(&txring->lock, flags);
989
990 if (txring->next_to_clean - txring->next_to_use ==
991 TX_RING_SIZE) {
992 /* Still no room -- stop the queue and wait for tx
993 * intr when there's room.
994 */
995 netif_stop_queue(dev);
996 goto out_err;
997 }
998 }
999
1000
1001 dp = &TX_DESC(mac, txring->next_to_use);
1002 info = &TX_DESC_INFO(mac, txring->next_to_use);
1003
1004 dp->mactx = dflags | XCT_MACTX_LLEN(skb->len);
1005 dp->ptr = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1006 info->dma = map;
1007 info->skb = skb;
1008
1009 txring->next_to_use++;
1010 mac->stats.tx_packets++;
1011 mac->stats.tx_bytes += skb->len;
1012
1013 spin_unlock_irqrestore(&txring->lock, flags);
1014
1015 pci_write_config_dword(mac->dma_pdev,
1016 PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1017
1018 return NETDEV_TX_OK;
1019
1020 out_err:
1021 spin_unlock_irqrestore(&txring->lock, flags);
1022 pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1023 return NETDEV_TX_BUSY;
1024 }
1025
1026 static struct net_device_stats *pasemi_mac_get_stats(struct net_device *dev)
1027 {
1028 struct pasemi_mac *mac = netdev_priv(dev);
1029
1030 return &mac->stats;
1031 }
1032
1033
1034 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1035 {
1036 struct pasemi_mac *mac = netdev_priv(dev);
1037 unsigned int flags;
1038
1039 pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
1040
1041 /* Set promiscuous */
1042 if (dev->flags & IFF_PROMISC)
1043 flags |= PAS_MAC_CFG_PCFG_PR;
1044 else
1045 flags &= ~PAS_MAC_CFG_PCFG_PR;
1046
1047 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
1048 }
1049
1050
1051 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1052 {
1053 struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1054 struct net_device *dev = mac->netdev;
1055 int pkts;
1056
1057 pkts = pasemi_mac_clean_rx(mac, budget);
1058 if (pkts < budget) {
1059 /* all done, no more packets present */
1060 netif_rx_complete(dev, napi);
1061
1062 pasemi_mac_restart_rx_intr(mac);
1063 }
1064 return pkts;
1065 }
1066
1067 static int __devinit
1068 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1069 {
1070 static int index = 0;
1071 struct net_device *dev;
1072 struct pasemi_mac *mac;
1073 int err;
1074
1075 err = pci_enable_device(pdev);
1076 if (err)
1077 return err;
1078
1079 dev = alloc_etherdev(sizeof(struct pasemi_mac));
1080 if (dev == NULL) {
1081 dev_err(&pdev->dev,
1082 "pasemi_mac: Could not allocate ethernet device.\n");
1083 err = -ENOMEM;
1084 goto out_disable_device;
1085 }
1086
1087 SET_MODULE_OWNER(dev);
1088 pci_set_drvdata(pdev, dev);
1089 SET_NETDEV_DEV(dev, &pdev->dev);
1090
1091 mac = netdev_priv(dev);
1092
1093 mac->pdev = pdev;
1094 mac->netdev = dev;
1095 mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1096
1097 netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1098
1099 dev->features = NETIF_F_HW_CSUM;
1100
1101 if (!mac->dma_pdev) {
1102 dev_err(&pdev->dev, "Can't find DMA Controller\n");
1103 err = -ENODEV;
1104 goto out_free_netdev;
1105 }
1106
1107 mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1108
1109 if (!mac->iob_pdev) {
1110 dev_err(&pdev->dev, "Can't find I/O Bridge\n");
1111 err = -ENODEV;
1112 goto out_put_dma_pdev;
1113 }
1114
1115 /* These should come out of the device tree eventually */
1116 mac->dma_txch = index;
1117 mac->dma_rxch = index;
1118
1119 /* We probe GMAC before XAUI, but the DMA interfaces are
1120 * in XAUI, GMAC order.
1121 */
1122 if (index < 4)
1123 mac->dma_if = index + 2;
1124 else
1125 mac->dma_if = index - 4;
1126 index++;
1127
1128 switch (pdev->device) {
1129 case 0xa005:
1130 mac->type = MAC_TYPE_GMAC;
1131 break;
1132 case 0xa006:
1133 mac->type = MAC_TYPE_XAUI;
1134 break;
1135 default:
1136 err = -ENODEV;
1137 goto out;
1138 }
1139
1140 /* get mac addr from device tree */
1141 if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1142 err = -ENODEV;
1143 goto out;
1144 }
1145 memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1146
1147 dev->open = pasemi_mac_open;
1148 dev->stop = pasemi_mac_close;
1149 dev->hard_start_xmit = pasemi_mac_start_tx;
1150 dev->get_stats = pasemi_mac_get_stats;
1151 dev->set_multicast_list = pasemi_mac_set_rx_mode;
1152
1153 /* The dma status structure is located in the I/O bridge, and
1154 * is cache coherent.
1155 */
1156 if (!dma_status)
1157 /* XXXOJN This should come from the device tree */
1158 dma_status = __ioremap(0xfd800000, 0x1000, 0);
1159
1160 mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1161 mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1162
1163 mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1164
1165 /* Enable most messages by default */
1166 mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1167
1168 err = register_netdev(dev);
1169
1170 if (err) {
1171 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1172 err);
1173 goto out;
1174 } else
1175 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1176 "hw addr %02x:%02x:%02x:%02x:%02x:%02x\n",
1177 dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1178 mac->dma_if, mac->dma_txch, mac->dma_rxch,
1179 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1180 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1181
1182 return err;
1183
1184 out:
1185 pci_dev_put(mac->iob_pdev);
1186 out_put_dma_pdev:
1187 pci_dev_put(mac->dma_pdev);
1188 out_free_netdev:
1189 free_netdev(dev);
1190 out_disable_device:
1191 pci_disable_device(pdev);
1192 return err;
1193
1194 }
1195
1196 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1197 {
1198 struct net_device *netdev = pci_get_drvdata(pdev);
1199 struct pasemi_mac *mac;
1200
1201 if (!netdev)
1202 return;
1203
1204 mac = netdev_priv(netdev);
1205
1206 unregister_netdev(netdev);
1207
1208 pci_disable_device(pdev);
1209 pci_dev_put(mac->dma_pdev);
1210 pci_dev_put(mac->iob_pdev);
1211
1212 pci_set_drvdata(pdev, NULL);
1213 free_netdev(netdev);
1214 }
1215
1216 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1217 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1218 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1219 { },
1220 };
1221
1222 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1223
1224 static struct pci_driver pasemi_mac_driver = {
1225 .name = "pasemi_mac",
1226 .id_table = pasemi_mac_pci_tbl,
1227 .probe = pasemi_mac_probe,
1228 .remove = __devexit_p(pasemi_mac_remove),
1229 };
1230
1231 static void __exit pasemi_mac_cleanup_module(void)
1232 {
1233 pci_unregister_driver(&pasemi_mac_driver);
1234 __iounmap(dma_status);
1235 dma_status = NULL;
1236 }
1237
1238 int pasemi_mac_init_module(void)
1239 {
1240 return pci_register_driver(&pasemi_mac_driver);
1241 }
1242
1243 module_init(pasemi_mac_init_module);
1244 module_exit(pasemi_mac_cleanup_module);
kernel source for telekom puls (alcatel/mediatek)