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cns3xxx: reduce buffer allocation size to 2048 bytes, improves ethernet performance
[openwrt/svn-archive/archive.git] / target / linux / cns3xxx / files / drivers / net / ethernet / cavium / cns3xxx_eth.c
1 /*
2 * Cavium CNS3xxx Gigabit driver for Linux
3 *
4 * Copyright 2011 Gateworks Corporation
5 * Chris Lang <clang@gateworks.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License
9 * as published by the Free Software Foundation.
10 *
11 */
12
13 #include <linux/delay.h>
14 #include <linux/module.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/dmapool.h>
17 #include <linux/etherdevice.h>
18 #include <linux/interrupt.h>
19 #include <linux/io.h>
20 #include <linux/kernel.h>
21 #include <linux/phy.h>
22 #include <linux/platform_device.h>
23 #include <linux/skbuff.h>
24 #include <mach/irqs.h>
25 #include <mach/platform.h>
26
27 #define DRV_NAME "cns3xxx_eth"
28
29 #define RX_DESCS 128
30 #define TX_DESCS 128
31 #define TX_DESC_RESERVE 20
32
33 #define RX_POOL_ALLOC_SIZE (sizeof(struct rx_desc) * RX_DESCS)
34 #define TX_POOL_ALLOC_SIZE (sizeof(struct tx_desc) * TX_DESCS)
35 #define REGS_SIZE 336
36
37 #define RX_BUFFER_ALIGN 64
38 #define RX_BUFFER_ALIGN_MASK (~(RX_BUFFER_ALIGN - 1))
39
40 #define SKB_HEAD_ALIGN (((PAGE_SIZE - NET_SKB_PAD) % RX_BUFFER_ALIGN) + NET_SKB_PAD + NET_IP_ALIGN)
41 #define RX_SEGMENT_ALLOC_SIZE 2048
42 #define RX_SEGMENT_BUFSIZE (SKB_WITH_OVERHEAD(RX_SEGMENT_ALLOC_SIZE))
43 #define RX_SEGMENT_MRU (((RX_SEGMENT_BUFSIZE - SKB_HEAD_ALIGN) & RX_BUFFER_ALIGN_MASK) - NET_IP_ALIGN)
44 #define MAX_MTU 9500
45
46 #define NAPI_WEIGHT 64
47
48 /* MDIO Defines */
49 #define MDIO_CMD_COMPLETE 0x00008000
50 #define MDIO_WRITE_COMMAND 0x00002000
51 #define MDIO_READ_COMMAND 0x00004000
52 #define MDIO_REG_OFFSET 8
53 #define MDIO_VALUE_OFFSET 16
54
55 /* Descritor Defines */
56 #define END_OF_RING 0x40000000
57 #define FIRST_SEGMENT 0x20000000
58 #define LAST_SEGMENT 0x10000000
59 #define FORCE_ROUTE 0x04000000
60 #define IP_CHECKSUM 0x00040000
61 #define UDP_CHECKSUM 0x00020000
62 #define TCP_CHECKSUM 0x00010000
63
64 /* Port Config Defines */
65 #define PORT_BP_ENABLE 0x00020000
66 #define PORT_DISABLE 0x00040000
67 #define PORT_LEARN_DIS 0x00080000
68 #define PORT_BLOCK_STATE 0x00100000
69 #define PORT_BLOCK_MODE 0x00200000
70
71 #define PROMISC_OFFSET 29
72
73 /* Global Config Defines */
74 #define UNKNOWN_VLAN_TO_CPU 0x02000000
75 #define ACCEPT_CRC_PACKET 0x00200000
76 #define CRC_STRIPPING 0x00100000
77
78 /* VLAN Config Defines */
79 #define NIC_MODE 0x00008000
80 #define VLAN_UNAWARE 0x00000001
81
82 /* DMA AUTO Poll Defines */
83 #define TS_POLL_EN 0x00000020
84 #define TS_SUSPEND 0x00000010
85 #define FS_POLL_EN 0x00000002
86 #define FS_SUSPEND 0x00000001
87
88 /* DMA Ring Control Defines */
89 #define QUEUE_THRESHOLD 0x000000f0
90 #define CLR_FS_STATE 0x80000000
91
92 /* Interrupt Status Defines */
93 #define MAC0_STATUS_CHANGE 0x00004000
94 #define MAC1_STATUS_CHANGE 0x00008000
95 #define MAC2_STATUS_CHANGE 0x00010000
96 #define MAC0_RX_ERROR 0x00100000
97 #define MAC1_RX_ERROR 0x00200000
98 #define MAC2_RX_ERROR 0x00400000
99
100 struct tx_desc
101 {
102 u32 sdp; /* segment data pointer */
103
104 union {
105 struct {
106 u32 sdl:16; /* segment data length */
107 u32 tco:1;
108 u32 uco:1;
109 u32 ico:1;
110 u32 rsv_1:3; /* reserve */
111 u32 pri:3;
112 u32 fp:1; /* force priority */
113 u32 fr:1;
114 u32 interrupt:1;
115 u32 lsd:1;
116 u32 fsd:1;
117 u32 eor:1;
118 u32 cown:1;
119 };
120 u32 config0;
121 };
122
123 union {
124 struct {
125 u32 ctv:1;
126 u32 stv:1;
127 u32 sid:4;
128 u32 inss:1;
129 u32 dels:1;
130 u32 rsv_2:9;
131 u32 pmap:5;
132 u32 mark:3;
133 u32 ewan:1;
134 u32 fewan:1;
135 u32 rsv_3:5;
136 };
137 u32 config1;
138 };
139
140 union {
141 struct {
142 u32 c_vid:12;
143 u32 c_cfs:1;
144 u32 c_pri:3;
145 u32 s_vid:12;
146 u32 s_dei:1;
147 u32 s_pri:3;
148 };
149 u32 config2;
150 };
151
152 u8 alignment[16]; /* for 32 byte */
153 };
154
155 struct rx_desc
156 {
157 u32 sdp; /* segment data pointer */
158
159 union {
160 struct {
161 u32 sdl:16; /* segment data length */
162 u32 l4f:1;
163 u32 ipf:1;
164 u32 prot:4;
165 u32 hr:6;
166 u32 lsd:1;
167 u32 fsd:1;
168 u32 eor:1;
169 u32 cown:1;
170 };
171 u32 config0;
172 };
173
174 union {
175 struct {
176 u32 ctv:1;
177 u32 stv:1;
178 u32 unv:1;
179 u32 iwan:1;
180 u32 exdv:1;
181 u32 e_wan:1;
182 u32 rsv_1:2;
183 u32 sp:3;
184 u32 crc_err:1;
185 u32 un_eth:1;
186 u32 tc:2;
187 u32 rsv_2:1;
188 u32 ip_offset:5;
189 u32 rsv_3:11;
190 };
191 u32 config1;
192 };
193
194 union {
195 struct {
196 u32 c_vid:12;
197 u32 c_cfs:1;
198 u32 c_pri:3;
199 u32 s_vid:12;
200 u32 s_dei:1;
201 u32 s_pri:3;
202 };
203 u32 config2;
204 };
205
206 u8 alignment[16]; /* for 32 byte alignment */
207 };
208
209
210 struct switch_regs {
211 u32 phy_control;
212 u32 phy_auto_addr;
213 u32 mac_glob_cfg;
214 u32 mac_cfg[4];
215 u32 mac_pri_ctrl[5], __res;
216 u32 etype[2];
217 u32 udp_range[4];
218 u32 prio_etype_udp;
219 u32 prio_ipdscp[8];
220 u32 tc_ctrl;
221 u32 rate_ctrl;
222 u32 fc_glob_thrs;
223 u32 fc_port_thrs;
224 u32 mc_fc_glob_thrs;
225 u32 dc_glob_thrs;
226 u32 arl_vlan_cmd;
227 u32 arl_ctrl[3];
228 u32 vlan_cfg;
229 u32 pvid[2];
230 u32 vlan_ctrl[3];
231 u32 session_id[8];
232 u32 intr_stat;
233 u32 intr_mask;
234 u32 sram_test;
235 u32 mem_queue;
236 u32 farl_ctrl;
237 u32 fc_input_thrs, __res1[2];
238 u32 clk_skew_ctrl;
239 u32 mac_glob_cfg_ext, __res2[2];
240 u32 dma_ring_ctrl;
241 u32 dma_auto_poll_cfg;
242 u32 delay_intr_cfg, __res3;
243 u32 ts_dma_ctrl0;
244 u32 ts_desc_ptr0;
245 u32 ts_desc_base_addr0, __res4;
246 u32 fs_dma_ctrl0;
247 u32 fs_desc_ptr0;
248 u32 fs_desc_base_addr0, __res5;
249 u32 ts_dma_ctrl1;
250 u32 ts_desc_ptr1;
251 u32 ts_desc_base_addr1, __res6;
252 u32 fs_dma_ctrl1;
253 u32 fs_desc_ptr1;
254 u32 fs_desc_base_addr1;
255 u32 __res7[109];
256 u32 mac_counter0[13];
257 };
258
259 struct _tx_ring {
260 struct tx_desc *desc;
261 dma_addr_t phys_addr;
262 struct tx_desc *cur_addr;
263 struct sk_buff *buff_tab[TX_DESCS];
264 unsigned int phys_tab[TX_DESCS];
265 u32 free_index;
266 u32 count_index;
267 u32 cur_index;
268 int num_used;
269 int num_count;
270 bool stopped;
271 };
272
273 struct _rx_ring {
274 struct rx_desc *desc;
275 dma_addr_t phys_addr;
276 struct rx_desc *cur_addr;
277 void *buff_tab[RX_DESCS];
278 unsigned int phys_tab[RX_DESCS];
279 u32 cur_index;
280 u32 alloc_index;
281 int alloc_count;
282 };
283
284 struct sw {
285 struct resource *mem_res;
286 struct switch_regs __iomem *regs;
287 struct napi_struct napi;
288 struct cns3xxx_plat_info *plat;
289 struct _tx_ring *tx_ring;
290 struct _rx_ring *rx_ring;
291 struct sk_buff *frag_first;
292 struct sk_buff *frag_last;
293 };
294
295 struct port {
296 struct net_device *netdev;
297 struct phy_device *phydev;
298 struct sw *sw;
299 int id; /* logical port ID */
300 int speed, duplex;
301 };
302
303 static spinlock_t mdio_lock;
304 static DEFINE_SPINLOCK(tx_lock);
305 static struct switch_regs __iomem *mdio_regs; /* mdio command and status only */
306 struct mii_bus *mdio_bus;
307 static int ports_open;
308 static struct port *switch_port_tab[4];
309 static struct dma_pool *rx_dma_pool;
310 static struct dma_pool *tx_dma_pool;
311 struct net_device *napi_dev;
312
313 static int cns3xxx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
314 int write, u16 cmd)
315 {
316 int cycles = 0;
317 u32 temp = 0;
318
319 temp = __raw_readl(&mdio_regs->phy_control);
320 temp |= MDIO_CMD_COMPLETE;
321 __raw_writel(temp, &mdio_regs->phy_control);
322 udelay(10);
323
324 if (write) {
325 temp = (cmd << MDIO_VALUE_OFFSET);
326 temp |= MDIO_WRITE_COMMAND;
327 } else {
328 temp = MDIO_READ_COMMAND;
329 }
330 temp |= ((location & 0x1f) << MDIO_REG_OFFSET);
331 temp |= (phy_id & 0x1f);
332
333 __raw_writel(temp, &mdio_regs->phy_control);
334
335 while (((__raw_readl(&mdio_regs->phy_control) & MDIO_CMD_COMPLETE) == 0)
336 && cycles < 5000) {
337 udelay(1);
338 cycles++;
339 }
340
341 if (cycles == 5000) {
342 printk(KERN_ERR "%s #%i: MII transaction failed\n", bus->name,
343 phy_id);
344 return -1;
345 }
346
347 temp = __raw_readl(&mdio_regs->phy_control);
348 temp |= MDIO_CMD_COMPLETE;
349 __raw_writel(temp, &mdio_regs->phy_control);
350
351 if (write)
352 return 0;
353
354 return ((temp >> MDIO_VALUE_OFFSET) & 0xFFFF);
355 }
356
357 static int cns3xxx_mdio_read(struct mii_bus *bus, int phy_id, int location)
358 {
359 unsigned long flags;
360 int ret;
361
362 spin_lock_irqsave(&mdio_lock, flags);
363 ret = cns3xxx_mdio_cmd(bus, phy_id, location, 0, 0);
364 spin_unlock_irqrestore(&mdio_lock, flags);
365 return ret;
366 }
367
368 static int cns3xxx_mdio_write(struct mii_bus *bus, int phy_id, int location,
369 u16 val)
370 {
371 unsigned long flags;
372 int ret;
373
374 spin_lock_irqsave(&mdio_lock, flags);
375 ret = cns3xxx_mdio_cmd(bus, phy_id, location, 1, val);
376 spin_unlock_irqrestore(&mdio_lock, flags);
377 return ret;
378 }
379
380 static int cns3xxx_mdio_register(void)
381 {
382 int err;
383
384 if (!(mdio_bus = mdiobus_alloc()))
385 return -ENOMEM;
386
387 mdio_regs = (struct switch_regs __iomem *)CNS3XXX_SWITCH_BASE_VIRT;
388
389 spin_lock_init(&mdio_lock);
390 mdio_bus->name = "CNS3xxx MII Bus";
391 mdio_bus->read = &cns3xxx_mdio_read;
392 mdio_bus->write = &cns3xxx_mdio_write;
393 strcpy(mdio_bus->id, "0");
394
395 if ((err = mdiobus_register(mdio_bus)))
396 mdiobus_free(mdio_bus);
397 return err;
398 }
399
400 static void cns3xxx_mdio_remove(void)
401 {
402 mdiobus_unregister(mdio_bus);
403 mdiobus_free(mdio_bus);
404 }
405
406 static void enable_tx_dma(struct sw *sw)
407 {
408 __raw_writel(0x1, &sw->regs->ts_dma_ctrl0);
409 }
410
411 static void enable_rx_dma(struct sw *sw)
412 {
413 __raw_writel(0x1, &sw->regs->fs_dma_ctrl0);
414 }
415
416 static void cns3xxx_adjust_link(struct net_device *dev)
417 {
418 struct port *port = netdev_priv(dev);
419 struct phy_device *phydev = port->phydev;
420
421 if (!phydev->link) {
422 if (port->speed) {
423 port->speed = 0;
424 printk(KERN_INFO "%s: link down\n", dev->name);
425 }
426 return;
427 }
428
429 if (port->speed == phydev->speed && port->duplex == phydev->duplex)
430 return;
431
432 port->speed = phydev->speed;
433 port->duplex = phydev->duplex;
434
435 printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
436 dev->name, port->speed, port->duplex ? "full" : "half");
437 }
438
439 irqreturn_t eth_rx_irq(int irq, void *pdev)
440 {
441 struct net_device *dev = pdev;
442 struct sw *sw = netdev_priv(dev);
443 if (likely(napi_schedule_prep(&sw->napi))) {
444 disable_irq_nosync(IRQ_CNS3XXX_SW_R0RXC);
445 __napi_schedule(&sw->napi);
446 }
447 return (IRQ_HANDLED);
448 }
449
450 irqreturn_t eth_stat_irq(int irq, void *pdev)
451 {
452 struct net_device *dev = pdev;
453 struct sw *sw = netdev_priv(dev);
454 u32 cfg;
455 u32 stat = __raw_readl(&sw->regs->intr_stat);
456 __raw_writel(0xffffffff, &sw->regs->intr_stat);
457
458 if (stat & MAC2_RX_ERROR)
459 switch_port_tab[3]->netdev->stats.rx_dropped++;
460 if (stat & MAC1_RX_ERROR)
461 switch_port_tab[1]->netdev->stats.rx_dropped++;
462 if (stat & MAC0_RX_ERROR)
463 switch_port_tab[0]->netdev->stats.rx_dropped++;
464
465 if (stat & MAC0_STATUS_CHANGE) {
466 cfg = __raw_readl(&sw->regs->mac_cfg[0]);
467 switch_port_tab[0]->phydev->link = (cfg & 0x1);
468 switch_port_tab[0]->phydev->duplex = ((cfg >> 4) & 0x1);
469 if (((cfg >> 2) & 0x3) == 2)
470 switch_port_tab[0]->phydev->speed = 1000;
471 else if (((cfg >> 2) & 0x3) == 1)
472 switch_port_tab[0]->phydev->speed = 100;
473 else
474 switch_port_tab[0]->phydev->speed = 10;
475 cns3xxx_adjust_link(switch_port_tab[0]->netdev);
476 }
477
478 if (stat & MAC1_STATUS_CHANGE) {
479 cfg = __raw_readl(&sw->regs->mac_cfg[1]);
480 switch_port_tab[1]->phydev->link = (cfg & 0x1);
481 switch_port_tab[1]->phydev->duplex = ((cfg >> 4) & 0x1);
482 if (((cfg >> 2) & 0x3) == 2)
483 switch_port_tab[1]->phydev->speed = 1000;
484 else if (((cfg >> 2) & 0x3) == 1)
485 switch_port_tab[1]->phydev->speed = 100;
486 else
487 switch_port_tab[1]->phydev->speed = 10;
488 cns3xxx_adjust_link(switch_port_tab[1]->netdev);
489 }
490
491 if (stat & MAC2_STATUS_CHANGE) {
492 cfg = __raw_readl(&sw->regs->mac_cfg[3]);
493 switch_port_tab[3]->phydev->link = (cfg & 0x1);
494 switch_port_tab[3]->phydev->duplex = ((cfg >> 4) & 0x1);
495 if (((cfg >> 2) & 0x3) == 2)
496 switch_port_tab[3]->phydev->speed = 1000;
497 else if (((cfg >> 2) & 0x3) == 1)
498 switch_port_tab[3]->phydev->speed = 100;
499 else
500 switch_port_tab[3]->phydev->speed = 10;
501 cns3xxx_adjust_link(switch_port_tab[3]->netdev);
502 }
503
504 return (IRQ_HANDLED);
505 }
506
507
508 static void cns3xxx_alloc_rx_buf(struct sw *sw, int received)
509 {
510 struct _rx_ring *rx_ring = sw->rx_ring;
511 unsigned int i = rx_ring->alloc_index;
512 struct rx_desc *desc = &(rx_ring)->desc[i];
513 void *buf;
514 unsigned int phys;
515
516 for (received += rx_ring->alloc_count; received > 0; received--) {
517 buf = kzalloc(RX_SEGMENT_ALLOC_SIZE, GFP_ATOMIC);
518 if (!buf)
519 goto out;
520
521 phys = dma_map_single(NULL, buf + SKB_HEAD_ALIGN,
522 RX_SEGMENT_MRU, DMA_FROM_DEVICE);
523 if (dma_mapping_error(NULL, phys)) {
524 kfree(buf);
525 goto out;
526 }
527
528 desc->sdl = RX_SEGMENT_MRU;
529 desc->sdp = phys;
530
531 /* put the new buffer on RX-free queue */
532 rx_ring->buff_tab[i] = buf;
533 rx_ring->phys_tab[i] = phys;
534 if (i == RX_DESCS - 1) {
535 i = 0;
536 desc->config0 = END_OF_RING | FIRST_SEGMENT |
537 LAST_SEGMENT | RX_SEGMENT_MRU;
538 desc = &(rx_ring)->desc[i];
539 } else {
540 desc->config0 = FIRST_SEGMENT | LAST_SEGMENT |
541 RX_SEGMENT_MRU;
542 i++;
543 desc++;
544 }
545 }
546 out:
547 rx_ring->alloc_count = received;
548 rx_ring->alloc_index = i;
549 }
550
551 static void eth_check_num_used(struct _tx_ring *tx_ring)
552 {
553 bool stop = false;
554 int i;
555
556 if (tx_ring->num_used >= TX_DESCS - TX_DESC_RESERVE)
557 stop = true;
558
559 if (tx_ring->stopped == stop)
560 return;
561
562 tx_ring->stopped = stop;
563 for (i = 0; i < 4; i++) {
564 struct port *port = switch_port_tab[i];
565 struct net_device *dev;
566
567 if (!port)
568 continue;
569
570 dev = port->netdev;
571 if (stop)
572 netif_stop_queue(dev);
573 else
574 netif_wake_queue(dev);
575 }
576 }
577
578 static void eth_complete_tx(struct sw *sw)
579 {
580 struct _tx_ring *tx_ring = sw->tx_ring;
581 struct tx_desc *desc;
582 int i;
583 int index;
584 int num_used = tx_ring->num_used;
585 struct sk_buff *skb;
586
587 index = tx_ring->free_index;
588 desc = &(tx_ring)->desc[index];
589 for (i = 0; i < num_used; i++) {
590 if (desc->cown) {
591 skb = tx_ring->buff_tab[index];
592 tx_ring->buff_tab[index] = 0;
593 if (skb)
594 dev_kfree_skb_any(skb);
595 dma_unmap_single(NULL, tx_ring->phys_tab[index],
596 desc->sdl, DMA_TO_DEVICE);
597 if (++index == TX_DESCS) {
598 index = 0;
599 desc = &(tx_ring)->desc[index];
600 } else {
601 desc++;
602 }
603 } else {
604 break;
605 }
606 }
607 tx_ring->free_index = index;
608 tx_ring->num_used -= i;
609 eth_check_num_used(tx_ring);
610 }
611
612 static int eth_poll(struct napi_struct *napi, int budget)
613 {
614 struct sw *sw = container_of(napi, struct sw, napi);
615 struct _rx_ring *rx_ring = sw->rx_ring;
616 int received = 0;
617 unsigned int length;
618 unsigned int i = rx_ring->cur_index;
619 struct rx_desc *desc = &(rx_ring)->desc[i];
620
621 while (desc->cown) {
622 struct sk_buff *skb;
623 int reserve = SKB_HEAD_ALIGN;
624
625 if (received >= budget)
626 break;
627
628 /* process received frame */
629 dma_unmap_single(NULL, rx_ring->phys_tab[i],
630 RX_SEGMENT_MRU, DMA_FROM_DEVICE);
631
632 skb = build_skb(rx_ring->buff_tab[i], 0);
633 if (!skb)
634 break;
635
636 skb->dev = switch_port_tab[desc->sp]->netdev;
637
638 length = desc->sdl;
639 if (desc->fsd && !desc->lsd)
640 length = RX_SEGMENT_MRU;
641
642 if (!desc->fsd) {
643 reserve -= NET_IP_ALIGN;
644 if (!desc->lsd)
645 length += NET_IP_ALIGN;
646 }
647
648 skb_reserve(skb, reserve);
649 skb_put(skb, length);
650
651 if (!sw->frag_first)
652 sw->frag_first = skb;
653 else {
654 if (sw->frag_first == sw->frag_last)
655 skb_frag_add_head(sw->frag_first, skb);
656 else
657 sw->frag_last->next = skb;
658 sw->frag_first->len += skb->len;
659 sw->frag_first->data_len += skb->len;
660 sw->frag_first->truesize += skb->truesize;
661 }
662 sw->frag_last = skb;
663
664 if (desc->lsd) {
665 struct net_device *dev;
666
667 skb = sw->frag_first;
668 dev = skb->dev;
669 skb->protocol = eth_type_trans(skb, dev);
670
671 dev->stats.rx_packets++;
672 dev->stats.rx_bytes += skb->len;
673
674 /* RX Hardware checksum offload */
675 skb->ip_summed = CHECKSUM_NONE;
676 switch (desc->prot) {
677 case 1:
678 case 2:
679 case 5:
680 case 6:
681 case 13:
682 case 14:
683 if (!desc->l4f) {
684 skb->ip_summed = CHECKSUM_UNNECESSARY;
685 napi_gro_receive(napi, skb);
686 break;
687 }
688 /* fall through */
689 default:
690 netif_receive_skb(skb);
691 break;
692 }
693
694 sw->frag_first = NULL;
695 sw->frag_last = NULL;
696 }
697
698 received++;
699 if (++i == RX_DESCS) {
700 i = 0;
701 desc = &(rx_ring)->desc[i];
702 } else {
703 desc++;
704 }
705 }
706
707 cns3xxx_alloc_rx_buf(sw, received);
708
709 rx_ring->cur_index = i;
710
711 if (received != budget) {
712 napi_complete(napi);
713 enable_irq(IRQ_CNS3XXX_SW_R0RXC);
714 }
715
716 enable_rx_dma(sw);
717
718 spin_lock_bh(&tx_lock);
719 eth_complete_tx(sw);
720 spin_unlock_bh(&tx_lock);
721
722 return received;
723 }
724
725 static void eth_set_desc(struct _tx_ring *tx_ring, int index, int index_last,
726 void *data, int len, u32 config0, u32 pmap)
727 {
728 struct tx_desc *tx_desc = &(tx_ring)->desc[index];
729 unsigned int phys;
730
731 phys = dma_map_single(NULL, data, len, DMA_TO_DEVICE);
732 tx_desc->sdp = phys;
733 tx_desc->pmap = pmap;
734 tx_ring->phys_tab[index] = phys;
735
736 config0 |= len;
737 if (index == TX_DESCS - 1)
738 config0 |= END_OF_RING;
739 if (index == index_last)
740 config0 |= LAST_SEGMENT;
741
742 mb();
743 tx_desc->config0 = config0;
744 }
745
746 static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
747 {
748 struct port *port = netdev_priv(dev);
749 struct sw *sw = port->sw;
750 struct _tx_ring *tx_ring = sw->tx_ring;
751 struct sk_buff *skb1;
752 char pmap = (1 << port->id);
753 int nr_frags = skb_shinfo(skb)->nr_frags;
754 int nr_desc = nr_frags;
755 int index0, index, index_last;
756 int len0;
757 unsigned int i;
758 u32 config0;
759
760 if (pmap == 8)
761 pmap = (1 << 4);
762
763 skb_walk_frags(skb, skb1)
764 nr_desc++;
765
766 spin_lock_bh(&tx_lock);
767
768 eth_complete_tx(sw);
769 if ((tx_ring->num_used + nr_desc + 1) >= TX_DESCS) {
770 spin_unlock_bh(&tx_lock);
771 return NETDEV_TX_BUSY;
772 }
773
774 index = index0 = tx_ring->cur_index;
775 index_last = (index0 + nr_desc) % TX_DESCS;
776 tx_ring->cur_index = (index_last + 1) % TX_DESCS;
777
778 spin_unlock_bh(&tx_lock);
779
780 config0 = FORCE_ROUTE;
781 if (skb->ip_summed == CHECKSUM_PARTIAL)
782 config0 |= UDP_CHECKSUM | TCP_CHECKSUM;
783
784 len0 = skb->len;
785
786 /* fragments */
787 for (i = 0; i < nr_frags; i++) {
788 struct skb_frag_struct *frag;
789 void *addr;
790
791 index = (index + 1) % TX_DESCS;
792
793 frag = &skb_shinfo(skb)->frags[i];
794 addr = page_address(skb_frag_page(frag)) + frag->page_offset;
795
796 eth_set_desc(tx_ring, index, index_last, addr, frag->size,
797 config0, pmap);
798 }
799
800 if (nr_frags)
801 len0 = skb->len - skb->data_len;
802
803 skb_walk_frags(skb, skb1) {
804 index = (index + 1) % TX_DESCS;
805 len0 -= skb1->len;
806
807 eth_set_desc(tx_ring, index, index_last, skb1->data, skb1->len,
808 config0, pmap);
809 }
810
811 tx_ring->buff_tab[index0] = skb;
812 eth_set_desc(tx_ring, index0, index_last, skb->data, len0,
813 config0 | FIRST_SEGMENT, pmap);
814
815 mb();
816
817 spin_lock(&tx_lock);
818 tx_ring->num_used += nr_desc + 1;
819 spin_unlock(&tx_lock);
820
821 dev->stats.tx_packets++;
822 dev->stats.tx_bytes += skb->len;
823
824 enable_tx_dma(sw);
825
826 return NETDEV_TX_OK;
827 }
828
829 static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
830 {
831 struct port *port = netdev_priv(dev);
832
833 if (!netif_running(dev))
834 return -EINVAL;
835 return phy_mii_ioctl(port->phydev, req, cmd);
836 }
837
838 /* ethtool support */
839
840 static void cns3xxx_get_drvinfo(struct net_device *dev,
841 struct ethtool_drvinfo *info)
842 {
843 strcpy(info->driver, DRV_NAME);
844 strcpy(info->bus_info, "internal");
845 }
846
847 static int cns3xxx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
848 {
849 struct port *port = netdev_priv(dev);
850 return phy_ethtool_gset(port->phydev, cmd);
851 }
852
853 static int cns3xxx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
854 {
855 struct port *port = netdev_priv(dev);
856 return phy_ethtool_sset(port->phydev, cmd);
857 }
858
859 static int cns3xxx_nway_reset(struct net_device *dev)
860 {
861 struct port *port = netdev_priv(dev);
862 return phy_start_aneg(port->phydev);
863 }
864
865 static struct ethtool_ops cns3xxx_ethtool_ops = {
866 .get_drvinfo = cns3xxx_get_drvinfo,
867 .get_settings = cns3xxx_get_settings,
868 .set_settings = cns3xxx_set_settings,
869 .nway_reset = cns3xxx_nway_reset,
870 .get_link = ethtool_op_get_link,
871 };
872
873
874 static int init_rings(struct sw *sw)
875 {
876 int i;
877 struct _rx_ring *rx_ring = sw->rx_ring;
878 struct _tx_ring *tx_ring = sw->tx_ring;
879
880 __raw_writel(0, &sw->regs->fs_dma_ctrl0);
881 __raw_writel(TS_SUSPEND | FS_SUSPEND, &sw->regs->dma_auto_poll_cfg);
882 __raw_writel(QUEUE_THRESHOLD, &sw->regs->dma_ring_ctrl);
883 __raw_writel(CLR_FS_STATE | QUEUE_THRESHOLD, &sw->regs->dma_ring_ctrl);
884
885 __raw_writel(QUEUE_THRESHOLD, &sw->regs->dma_ring_ctrl);
886
887 if (!(rx_dma_pool = dma_pool_create(DRV_NAME, NULL,
888 RX_POOL_ALLOC_SIZE, 32, 0)))
889 return -ENOMEM;
890
891 if (!(rx_ring->desc = dma_pool_alloc(rx_dma_pool, GFP_KERNEL,
892 &rx_ring->phys_addr)))
893 return -ENOMEM;
894 memset(rx_ring->desc, 0, RX_POOL_ALLOC_SIZE);
895
896 /* Setup RX buffers */
897 for (i = 0; i < RX_DESCS; i++) {
898 struct rx_desc *desc = &(rx_ring)->desc[i];
899 void *buf;
900
901 buf = kzalloc(RX_SEGMENT_ALLOC_SIZE, GFP_KERNEL);
902 if (!buf)
903 return -ENOMEM;
904
905 desc->sdl = RX_SEGMENT_MRU;
906 if (i == (RX_DESCS - 1))
907 desc->eor = 1;
908 desc->fsd = 1;
909 desc->lsd = 1;
910
911 desc->sdp = dma_map_single(NULL, buf + SKB_HEAD_ALIGN,
912 RX_SEGMENT_MRU, DMA_FROM_DEVICE);
913 if (dma_mapping_error(NULL, desc->sdp))
914 return -EIO;
915
916 rx_ring->buff_tab[i] = buf;
917 rx_ring->phys_tab[i] = desc->sdp;
918 desc->cown = 0;
919 }
920 __raw_writel(rx_ring->phys_addr, &sw->regs->fs_desc_ptr0);
921 __raw_writel(rx_ring->phys_addr, &sw->regs->fs_desc_base_addr0);
922
923 if (!(tx_dma_pool = dma_pool_create(DRV_NAME, NULL,
924 TX_POOL_ALLOC_SIZE, 32, 0)))
925 return -ENOMEM;
926
927 if (!(tx_ring->desc = dma_pool_alloc(tx_dma_pool, GFP_KERNEL,
928 &tx_ring->phys_addr)))
929 return -ENOMEM;
930 memset(tx_ring->desc, 0, TX_POOL_ALLOC_SIZE);
931
932 /* Setup TX buffers */
933 for (i = 0; i < TX_DESCS; i++) {
934 struct tx_desc *desc = &(tx_ring)->desc[i];
935 tx_ring->buff_tab[i] = 0;
936
937 if (i == (TX_DESCS - 1))
938 desc->eor = 1;
939 desc->cown = 1;
940 }
941 __raw_writel(tx_ring->phys_addr, &sw->regs->ts_desc_ptr0);
942 __raw_writel(tx_ring->phys_addr, &sw->regs->ts_desc_base_addr0);
943
944 return 0;
945 }
946
947 static void destroy_rings(struct sw *sw)
948 {
949 int i;
950 if (sw->rx_ring->desc) {
951 for (i = 0; i < RX_DESCS; i++) {
952 struct _rx_ring *rx_ring = sw->rx_ring;
953 struct rx_desc *desc = &(rx_ring)->desc[i];
954 struct sk_buff *skb = sw->rx_ring->buff_tab[i];
955
956 if (!skb)
957 continue;
958
959 dma_unmap_single(NULL, desc->sdp, RX_SEGMENT_MRU,
960 DMA_FROM_DEVICE);
961 dev_kfree_skb(skb);
962 }
963 dma_pool_free(rx_dma_pool, sw->rx_ring->desc, sw->rx_ring->phys_addr);
964 dma_pool_destroy(rx_dma_pool);
965 rx_dma_pool = 0;
966 sw->rx_ring->desc = 0;
967 }
968 if (sw->tx_ring->desc) {
969 for (i = 0; i < TX_DESCS; i++) {
970 struct _tx_ring *tx_ring = sw->tx_ring;
971 struct tx_desc *desc = &(tx_ring)->desc[i];
972 struct sk_buff *skb = sw->tx_ring->buff_tab[i];
973 if (skb) {
974 dma_unmap_single(NULL, desc->sdp,
975 skb->len, DMA_TO_DEVICE);
976 dev_kfree_skb(skb);
977 }
978 }
979 dma_pool_free(tx_dma_pool, sw->tx_ring->desc, sw->tx_ring->phys_addr);
980 dma_pool_destroy(tx_dma_pool);
981 tx_dma_pool = 0;
982 sw->tx_ring->desc = 0;
983 }
984 }
985
986 static int eth_open(struct net_device *dev)
987 {
988 struct port *port = netdev_priv(dev);
989 struct sw *sw = port->sw;
990 u32 temp;
991
992 port->speed = 0; /* force "link up" message */
993 phy_start(port->phydev);
994
995 netif_start_queue(dev);
996
997 if (!ports_open) {
998 request_irq(IRQ_CNS3XXX_SW_R0RXC, eth_rx_irq, IRQF_SHARED, "gig_switch", napi_dev);
999 request_irq(IRQ_CNS3XXX_SW_STATUS, eth_stat_irq, IRQF_SHARED, "gig_stat", napi_dev);
1000 napi_enable(&sw->napi);
1001 netif_start_queue(napi_dev);
1002
1003 __raw_writel(~(MAC0_STATUS_CHANGE | MAC1_STATUS_CHANGE | MAC2_STATUS_CHANGE |
1004 MAC0_RX_ERROR | MAC1_RX_ERROR | MAC2_RX_ERROR), &sw->regs->intr_mask);
1005
1006 temp = __raw_readl(&sw->regs->mac_cfg[2]);
1007 temp &= ~(PORT_DISABLE);
1008 __raw_writel(temp, &sw->regs->mac_cfg[2]);
1009
1010 temp = __raw_readl(&sw->regs->dma_auto_poll_cfg);
1011 temp &= ~(TS_SUSPEND | FS_SUSPEND);
1012 __raw_writel(temp, &sw->regs->dma_auto_poll_cfg);
1013
1014 enable_rx_dma(sw);
1015 }
1016 temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
1017 temp &= ~(PORT_DISABLE);
1018 __raw_writel(temp, &sw->regs->mac_cfg[port->id]);
1019
1020 ports_open++;
1021 netif_carrier_on(dev);
1022
1023 return 0;
1024 }
1025
1026 static int eth_close(struct net_device *dev)
1027 {
1028 struct port *port = netdev_priv(dev);
1029 struct sw *sw = port->sw;
1030 u32 temp;
1031
1032 ports_open--;
1033
1034 temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
1035 temp |= (PORT_DISABLE);
1036 __raw_writel(temp, &sw->regs->mac_cfg[port->id]);
1037
1038 netif_stop_queue(dev);
1039
1040 phy_stop(port->phydev);
1041
1042 if (!ports_open) {
1043 disable_irq(IRQ_CNS3XXX_SW_R0RXC);
1044 free_irq(IRQ_CNS3XXX_SW_R0RXC, napi_dev);
1045 disable_irq(IRQ_CNS3XXX_SW_STATUS);
1046 free_irq(IRQ_CNS3XXX_SW_STATUS, napi_dev);
1047 napi_disable(&sw->napi);
1048 netif_stop_queue(napi_dev);
1049 temp = __raw_readl(&sw->regs->mac_cfg[2]);
1050 temp |= (PORT_DISABLE);
1051 __raw_writel(temp, &sw->regs->mac_cfg[2]);
1052
1053 __raw_writel(TS_SUSPEND | FS_SUSPEND,
1054 &sw->regs->dma_auto_poll_cfg);
1055 }
1056
1057 netif_carrier_off(dev);
1058 return 0;
1059 }
1060
1061 static void eth_rx_mode(struct net_device *dev)
1062 {
1063 struct port *port = netdev_priv(dev);
1064 struct sw *sw = port->sw;
1065 u32 temp;
1066
1067 temp = __raw_readl(&sw->regs->mac_glob_cfg);
1068
1069 if (dev->flags & IFF_PROMISC) {
1070 if (port->id == 3)
1071 temp |= ((1 << 2) << PROMISC_OFFSET);
1072 else
1073 temp |= ((1 << port->id) << PROMISC_OFFSET);
1074 } else {
1075 if (port->id == 3)
1076 temp &= ~((1 << 2) << PROMISC_OFFSET);
1077 else
1078 temp &= ~((1 << port->id) << PROMISC_OFFSET);
1079 }
1080 __raw_writel(temp, &sw->regs->mac_glob_cfg);
1081 }
1082
1083 static int eth_set_mac(struct net_device *netdev, void *p)
1084 {
1085 struct port *port = netdev_priv(netdev);
1086 struct sw *sw = port->sw;
1087 struct sockaddr *addr = p;
1088 u32 cycles = 0;
1089
1090 if (!is_valid_ether_addr(addr->sa_data))
1091 return -EADDRNOTAVAIL;
1092
1093 /* Invalidate old ARL Entry */
1094 if (port->id == 3)
1095 __raw_writel((port->id << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
1096 else
1097 __raw_writel(((port->id + 1) << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
1098 __raw_writel( ((netdev->dev_addr[0] << 24) | (netdev->dev_addr[1] << 16) |
1099 (netdev->dev_addr[2] << 8) | (netdev->dev_addr[3])),
1100 &sw->regs->arl_ctrl[1]);
1101
1102 __raw_writel( ((netdev->dev_addr[4] << 24) | (netdev->dev_addr[5] << 16) |
1103 (1 << 1)),
1104 &sw->regs->arl_ctrl[2]);
1105 __raw_writel((1 << 19), &sw->regs->arl_vlan_cmd);
1106
1107 while (((__raw_readl(&sw->regs->arl_vlan_cmd) & (1 << 21)) == 0)
1108 && cycles < 5000) {
1109 udelay(1);
1110 cycles++;
1111 }
1112
1113 cycles = 0;
1114 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1115
1116 if (port->id == 3)
1117 __raw_writel((port->id << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
1118 else
1119 __raw_writel(((port->id + 1) << 16) | (0x4 << 9), &sw->regs->arl_ctrl[0]);
1120 __raw_writel( ((addr->sa_data[0] << 24) | (addr->sa_data[1] << 16) |
1121 (addr->sa_data[2] << 8) | (addr->sa_data[3])),
1122 &sw->regs->arl_ctrl[1]);
1123
1124 __raw_writel( ((addr->sa_data[4] << 24) | (addr->sa_data[5] << 16) |
1125 (7 << 4) | (1 << 1)), &sw->regs->arl_ctrl[2]);
1126 __raw_writel((1 << 19), &sw->regs->arl_vlan_cmd);
1127
1128 while (((__raw_readl(&sw->regs->arl_vlan_cmd) & (1 << 21)) == 0)
1129 && cycles < 5000) {
1130 udelay(1);
1131 cycles++;
1132 }
1133 return 0;
1134 }
1135
1136 static int cns3xxx_change_mtu(struct net_device *dev, int new_mtu)
1137 {
1138 if (new_mtu > MAX_MTU)
1139 return -EINVAL;
1140
1141 dev->mtu = new_mtu;
1142 return 0;
1143 }
1144
1145 static const struct net_device_ops cns3xxx_netdev_ops = {
1146 .ndo_open = eth_open,
1147 .ndo_stop = eth_close,
1148 .ndo_start_xmit = eth_xmit,
1149 .ndo_set_rx_mode = eth_rx_mode,
1150 .ndo_do_ioctl = eth_ioctl,
1151 .ndo_change_mtu = cns3xxx_change_mtu,
1152 .ndo_set_mac_address = eth_set_mac,
1153 .ndo_validate_addr = eth_validate_addr,
1154 };
1155
1156 static int eth_init_one(struct platform_device *pdev)
1157 {
1158 int i;
1159 struct port *port;
1160 struct sw *sw;
1161 struct net_device *dev;
1162 struct cns3xxx_plat_info *plat = pdev->dev.platform_data;
1163 u32 regs_phys;
1164 char phy_id[MII_BUS_ID_SIZE + 3];
1165 int err;
1166 u32 temp;
1167
1168 if (!(napi_dev = alloc_etherdev(sizeof(struct sw))))
1169 return -ENOMEM;
1170 strcpy(napi_dev->name, "switch%d");
1171 napi_dev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST;
1172
1173 SET_NETDEV_DEV(napi_dev, &pdev->dev);
1174 sw = netdev_priv(napi_dev);
1175 memset(sw, 0, sizeof(struct sw));
1176 sw->regs = (struct switch_regs __iomem *)CNS3XXX_SWITCH_BASE_VIRT;
1177 regs_phys = CNS3XXX_SWITCH_BASE;
1178 sw->mem_res = request_mem_region(regs_phys, REGS_SIZE, napi_dev->name);
1179 if (!sw->mem_res) {
1180 err = -EBUSY;
1181 goto err_free;
1182 }
1183
1184 temp = __raw_readl(&sw->regs->phy_auto_addr);
1185 temp |= (3 << 30); /* maximum frame length: 9600 bytes */
1186 __raw_writel(temp, &sw->regs->phy_auto_addr);
1187
1188 for (i = 0; i < 4; i++) {
1189 temp = __raw_readl(&sw->regs->mac_cfg[i]);
1190 temp |= (PORT_DISABLE);
1191 __raw_writel(temp, &sw->regs->mac_cfg[i]);
1192 }
1193
1194 temp = PORT_DISABLE;
1195 __raw_writel(temp, &sw->regs->mac_cfg[2]);
1196
1197 temp = __raw_readl(&sw->regs->vlan_cfg);
1198 temp |= NIC_MODE | VLAN_UNAWARE;
1199 __raw_writel(temp, &sw->regs->vlan_cfg);
1200
1201 __raw_writel(UNKNOWN_VLAN_TO_CPU |
1202 CRC_STRIPPING, &sw->regs->mac_glob_cfg);
1203
1204 if (!(sw->rx_ring = kmalloc(sizeof(struct _rx_ring), GFP_KERNEL))) {
1205 err = -ENOMEM;
1206 goto err_free;
1207 }
1208 memset(sw->rx_ring, 0, sizeof(struct _rx_ring));
1209
1210 if (!(sw->tx_ring = kmalloc(sizeof(struct _tx_ring), GFP_KERNEL))) {
1211 err = -ENOMEM;
1212 goto err_free_rx;
1213 }
1214 memset(sw->tx_ring, 0, sizeof(struct _tx_ring));
1215
1216 if ((err = init_rings(sw)) != 0) {
1217 destroy_rings(sw);
1218 err = -ENOMEM;
1219 goto err_free_rings;
1220 }
1221 platform_set_drvdata(pdev, napi_dev);
1222
1223 netif_napi_add(napi_dev, &sw->napi, eth_poll, NAPI_WEIGHT);
1224
1225 for (i = 0; i < 3; i++) {
1226 if (!(plat->ports & (1 << i))) {
1227 continue;
1228 }
1229
1230 if (!(dev = alloc_etherdev(sizeof(struct port)))) {
1231 goto free_ports;
1232 }
1233
1234 port = netdev_priv(dev);
1235 port->netdev = dev;
1236 if (i == 2)
1237 port->id = 3;
1238 else
1239 port->id = i;
1240 port->sw = sw;
1241
1242 temp = __raw_readl(&sw->regs->mac_cfg[port->id]);
1243 temp |= (PORT_DISABLE | PORT_BLOCK_STATE | PORT_LEARN_DIS);
1244 __raw_writel(temp, &sw->regs->mac_cfg[port->id]);
1245
1246 dev->netdev_ops = &cns3xxx_netdev_ops;
1247 dev->ethtool_ops = &cns3xxx_ethtool_ops;
1248 dev->tx_queue_len = 1000;
1249 dev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST;
1250
1251 switch_port_tab[port->id] = port;
1252 memcpy(dev->dev_addr, &plat->hwaddr[i], ETH_ALEN);
1253
1254 snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, "0", plat->phy[i]);
1255 port->phydev = phy_connect(dev, phy_id, &cns3xxx_adjust_link, 0,
1256 PHY_INTERFACE_MODE_RGMII);
1257 if ((err = IS_ERR(port->phydev))) {
1258 switch_port_tab[port->id] = 0;
1259 free_netdev(dev);
1260 goto free_ports;
1261 }
1262
1263 port->phydev->irq = PHY_IGNORE_INTERRUPT;
1264
1265 if ((err = register_netdev(dev))) {
1266 phy_disconnect(port->phydev);
1267 switch_port_tab[port->id] = 0;
1268 free_netdev(dev);
1269 goto free_ports;
1270 }
1271
1272 printk(KERN_INFO "%s: RGMII PHY %i on cns3xxx Switch\n", dev->name, plat->phy[i]);
1273 netif_carrier_off(dev);
1274 dev = 0;
1275 }
1276
1277 return 0;
1278
1279 free_ports:
1280 err = -ENOMEM;
1281 for (--i; i >= 0; i--) {
1282 if (switch_port_tab[i]) {
1283 port = switch_port_tab[i];
1284 dev = port->netdev;
1285 unregister_netdev(dev);
1286 phy_disconnect(port->phydev);
1287 switch_port_tab[i] = 0;
1288 free_netdev(dev);
1289 }
1290 }
1291 err_free_rings:
1292 kfree(sw->tx_ring);
1293 err_free_rx:
1294 kfree(sw->rx_ring);
1295 err_free:
1296 free_netdev(napi_dev);
1297 return err;
1298 }
1299
1300 static int eth_remove_one(struct platform_device *pdev)
1301 {
1302 struct net_device *dev = platform_get_drvdata(pdev);
1303 struct sw *sw = netdev_priv(dev);
1304 int i;
1305 destroy_rings(sw);
1306
1307 for (i = 3; i >= 0; i--) {
1308 if (switch_port_tab[i]) {
1309 struct port *port = switch_port_tab[i];
1310 struct net_device *dev = port->netdev;
1311 unregister_netdev(dev);
1312 phy_disconnect(port->phydev);
1313 switch_port_tab[i] = 0;
1314 free_netdev(dev);
1315 }
1316 }
1317
1318 release_resource(sw->mem_res);
1319 free_netdev(napi_dev);
1320 return 0;
1321 }
1322
1323 static struct platform_driver cns3xxx_eth_driver = {
1324 .driver.name = DRV_NAME,
1325 .probe = eth_init_one,
1326 .remove = eth_remove_one,
1327 };
1328
1329 static int __init eth_init_module(void)
1330 {
1331 int err;
1332 if ((err = cns3xxx_mdio_register()))
1333 return err;
1334 return platform_driver_register(&cns3xxx_eth_driver);
1335 }
1336
1337 static void __exit eth_cleanup_module(void)
1338 {
1339 platform_driver_unregister(&cns3xxx_eth_driver);
1340 cns3xxx_mdio_remove();
1341 }
1342
1343 module_init(eth_init_module);
1344 module_exit(eth_cleanup_module);
1345
1346 MODULE_AUTHOR("Chris Lang");
1347 MODULE_DESCRIPTION("Cavium CNS3xxx Ethernet driver");
1348 MODULE_LICENSE("GPL v2");
1349 MODULE_ALIAS("platform:cns3xxx_eth");
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