2 * meth.c -- O2 Builtin 10/100 Ethernet driver
4 * Copyright (C) 2001 Ilya Volynets
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
11 #include <linux/module.h>
12 #include <linux/init.h>
14 #include <linux/sched.h>
15 #include <linux/kernel.h> /* printk() */
16 #include <linux/delay.h>
17 #include <linux/slab.h>
18 #include <linux/errno.h> /* error codes */
19 #include <linux/types.h> /* size_t */
20 #include <linux/interrupt.h> /* mark_bh */
21 #include <linux/pci.h>
24 #include <linux/netdevice.h> /* struct device, and other headers */
25 #include <linux/etherdevice.h> /* eth_type_trans */
26 #include <linux/ip.h> /* struct iphdr */
27 #include <linux/tcp.h> /* struct tcphdr */
28 #include <linux/skbuff.h>
29 #include <linux/mii.h> /*MII definitions */
31 #include <asm/ip32/crime.h>
32 #include <asm/ip32/mace.h>
33 #include <asm/ip32/ip32_ints.h>
37 #include <linux/in6.h>
38 #include <asm/checksum.h>
45 #define DPRINTK(str,args...) printk (KERN_DEBUG "meth(%ld): %s: " str, jiffies, __FUNCTION__ , ## args)
46 #define MFE_RX_DEBUG 2
48 #define DPRINTK(str,args...)
49 #define MFE_RX_DEBUG 0
53 static const char *version="meth.c: Ilya Volynets (ilya@theIlya.com)";
54 static const char *meth_str="SGI O2 Fast Ethernet";
55 MODULE_AUTHOR("Ilya Volynets");
56 MODULE_DESCRIPTION("SGI O2 Builtin Fast Ethernet driver");
58 /* This is a load-time options */
60 MODULE_PARM(eth, "i");*/
62 #define HAVE_TX_TIMEOUT
63 /* The maximum time waited (in jiffies) before assuming a Tx failed. (400ms) */
64 #define TX_TIMEOUT (400*HZ/1000)
66 #ifdef HAVE_TX_TIMEOUT
67 static int timeout = TX_TIMEOUT;
68 MODULE_PARM(timeout, "i");
75 * This structure is private to each device. It is used to pass
76 * packets in and out, so there is place for a packet
79 typedef struct meth_private {
80 struct net_device_stats stats;
81 volatile struct meth_regs *regs;
82 u64 mode; /* in-memory copy of MAC control register */
83 int phy_addr; /* address of phy, used by mdio_* functions, initialized in mdio_probe*/
85 dma_addr_t tx_ring_dma;
87 struct sk_buff *tx_skbs[TX_RING_ENTRIES];
88 dma_addr_t tx_skb_dmas[TX_RING_ENTRIES];
92 rx_packet *rx_ring[RX_RING_ENTRIES];
93 dma_addr_t rx_ring_dmas[RX_RING_ENTRIES];
99 extern struct net_device meth_devs[];
100 void meth_tx_timeout (struct net_device *dev);
101 void meth_interrupt(int irq, void *dev_id, struct pt_regs *pregs);
103 /* global, initialized in ip32-setup.c */
104 char o2meth_eaddr[8]={0,0,0,0,0,0,0,0};
106 static inline void load_eaddr(struct net_device *dev,
107 volatile struct meth_regs *regs)
110 DPRINTK("Loading MAC Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
111 (int)o2meth_eaddr[0]&0xFF,(int)o2meth_eaddr[1]&0xFF,(int)o2meth_eaddr[2]&0xFF,
112 (int)o2meth_eaddr[3]&0xFF,(int)o2meth_eaddr[4]&0xFF,(int)o2meth_eaddr[5]&0xFF);
113 //memcpy(dev->dev_addr,o2meth_eaddr+2,6);
115 dev->dev_addr[i]=o2meth_eaddr[i];
116 regs->mac_addr= //dev->dev_addr[0]|(dev->dev_addr[1]<<8)|
117 //dev->dev_addr[2]<<16|(dev->dev_addr[3]<<24)|
118 //dev->dev_addr[4]<<32|(dev->dev_addr[5]<<40);
119 (*(u64*)o2meth_eaddr)>>16;
120 DPRINTK("MAC, finally is %0lx\n",regs->mac_addr);
124 *Waits for BUSY status of mdio bus to clear
126 #define WAIT_FOR_PHY(___regs, ___rval) \
127 while((___rval=___regs->phy_data)&MDIO_BUSY){ \
130 /*read phy register, return value read */
131 static int mdio_read(meth_private *priv,int phyreg)
133 volatile meth_regs* regs=priv->regs;
135 WAIT_FOR_PHY(regs,rval)
136 regs->phy_registers=(priv->phy_addr<<5)|(phyreg&0x1f);
138 regs->phy_trans_go=1;
140 WAIT_FOR_PHY(regs,rval)
141 return rval&MDIO_DATA_MASK;
144 /*write phy register */
145 static void mdio_write(meth_private* priv,int pfyreg,int val)
147 volatile meth_regs* regs=priv->regs;
149 /// DPRINTK("Trying to write value %i to reguster %i\n",val, pfyreg);
150 spin_lock_irq(&priv->meth_lock);
151 WAIT_FOR_PHY(regs,rval)
152 regs->phy_registers=(priv->phy_addr<<5)|(pfyreg&0x1f);
155 WAIT_FOR_PHY(regs,rval)
156 spin_unlock_irq(&priv->meth_lock);
159 /* Modify phy register using given mask and value */
160 static void mdio_update(meth_private* priv,int phyreg, int val, int mask)
163 DPRINTK("RMW value %i to PHY register %i with mask %i\n",val,phyreg,mask);
164 rval=mdio_read(priv,phyreg);
165 rval=(rval&~mask)|(val&mask);
166 mdio_write(priv,phyreg,rval);
169 /* handle errata data on MDIO bus */
170 //static void mdio_errata(meth_private *priv)
172 /* Hmmm... what the hell is phyerrata? does it come from sys init parameters in IRIX */
174 static int mdio_probe(meth_private *priv)
177 DPRINTK("Detecting PHY kind\n");
178 /* check if phy is detected already */
179 if(priv->phy_addr>=0&&priv->phy_addr<32)
181 spin_lock_irq(&priv->meth_lock);
183 priv->phy_addr=(char)i;
184 p2=mdio_read(priv,2);
186 p3=mdio_read(priv,3);
187 switch ((p2<<12)|(p3>>4)){
189 DPRINTK("PHY is QS6612X\n");
192 DPRINTK("PHY is ICS1889\n");
195 DPRINTK("PHY is ICS1890\n");
198 DPRINTK("PHY is DP83840\n");
202 if(p2!=0xffff&&p2!=0x0000){
203 DPRINTK("PHY code: %x\n",(p2<<12)|(p3>>4));
207 spin_unlock_irq(&priv->meth_lock);
208 if(priv->phy_addr<32) {
211 DPRINTK("Oopsie! PHY is not known!\n");
216 static void meth_check_link(struct net_device *dev)
218 struct meth_private *priv = (struct meth_private *) dev->priv;
219 int mii_partner = mdio_read(priv, 5);
220 int mii_advertising = mdio_read(priv, 4);
221 int negotiated = mii_advertising & mii_partner;
224 if (mii_partner == 0xffff)
227 duplex = ((negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040)?METH_PHY_FDX:0;
228 speed = (negotiated & 0x0380)?METH_100MBIT:0;
230 if ((priv->mode & METH_PHY_FDX) ^ duplex)
232 DPRINTK("Setting %s-duplex\n", duplex ? "full" : "half");
234 priv->mode |= METH_PHY_FDX;
236 priv->mode &= ~METH_PHY_FDX;
237 priv->regs->mac_ctrl = priv->mode;
240 if ((priv->mode & METH_100MBIT) ^ speed)
242 DPRINTK("Setting %dMbs mode\n", speed ? 100 : 10);
244 priv->mode |= METH_100MBIT;
246 priv->mode &= ~METH_100MBIT;
247 priv->regs->mac_ctrl = priv->mode;
252 static int meth_init_tx_ring(meth_private *priv)
255 DPRINTK("Initializing TX ring\n");
256 priv->tx_ring = (tx_packet *) pci_alloc_consistent(NULL,TX_RING_BUFFER_SIZE,&(priv->tx_ring_dma));
259 memset(priv->tx_ring, 0, TX_RING_BUFFER_SIZE);
260 priv->tx_count = priv->tx_read = priv->tx_write = 0;
261 priv->regs->tx_ring_base = priv->tx_ring_dma;
262 priv->free_space = TX_RING_ENTRIES;
263 /* Now init skb save area */
264 memset(priv->tx_skbs,0,sizeof(priv->tx_skbs));
265 memset(priv->tx_skb_dmas,0,sizeof(priv->tx_skb_dmas));
266 DPRINTK("Done with TX ring init\n");
270 static int meth_init_rx_ring(meth_private *priv)
273 DPRINTK("Initializing RX ring\n");
274 for(i=0;i<RX_RING_ENTRIES;i++){
275 DPRINTK("\t1:\t%i\t",i);
276 /*if(!(priv->rx_ring[i]=get_free_page(GFP_KERNEL)))
278 DPRINTK("\t2:\t%i\n",i);*/
279 priv->rx_ring[i]=(rx_packet*)pci_alloc_consistent(NULL,METH_RX_BUFF_SIZE,&(priv->rx_ring_dmas[i]));
280 /* I'll need to re-sync it after each RX */
281 DPRINTK("\t%p\n",priv->rx_ring[i]);
282 priv->regs->rx_fifo=priv->rx_ring_dmas[i];
285 DPRINTK("Done with RX ring\n");
288 static void meth_free_tx_ring(meth_private *priv)
292 /* Remove any pending skb */
293 for (i = 0; i < TX_RING_ENTRIES; i++) {
294 if (priv->tx_skbs[i])
295 dev_kfree_skb(priv->tx_skbs[i]);
296 priv->tx_skbs[i] = NULL;
298 pci_free_consistent(NULL,
303 static void meth_free_rx_ring(meth_private *priv)
307 for(i=0;i<RX_RING_ENTRIES;i++)
308 pci_free_consistent(NULL,
311 priv->rx_ring_dmas[i]);
314 int meth_reset(struct net_device *dev)
316 struct meth_private *priv = (struct meth_private *) dev->priv;
319 priv->regs->mac_ctrl = SGI_MAC_RESET;
320 priv->regs->mac_ctrl = 0;
322 DPRINTK("MAC control after reset: %016lx\n", priv->regs->mac_ctrl);
324 /* Load ethernet address */
325 load_eaddr(dev, priv->regs);
326 /* Should load some "errata", but later */
328 /* Check for device */
329 if(mdio_probe(priv) < 0) {
330 DPRINTK("Unable to find PHY\n");
334 /* Initial mode -- 10|Half-duplex|Accept normal packets */
335 priv->mode=METH_ACCEPT_MCAST|METH_DEFAULT_IPG;
336 if(dev->flags | IFF_PROMISC)
337 priv->mode |= METH_PROMISC;
338 priv->regs->mac_ctrl = priv->mode;
340 /* Autonegociate speed and duplex mode */
341 meth_check_link(dev);
343 /* Now set dma control, but don't enable DMA, yet */
344 priv->regs->dma_ctrl= (4 << METH_RX_OFFSET_SHIFT) |
345 (RX_RING_ENTRIES << METH_RX_DEPTH_SHIFT);
350 /*============End Helper Routines=====================*/
356 int meth_open(struct net_device *dev)
358 meth_private *priv=dev->priv;
359 volatile meth_regs *regs=priv->regs;
365 METH_DMA_TX_EN|/*METH_DMA_TX_INT_EN|*/
366 METH_DMA_RX_EN|METH_DMA_RX_INT_EN;
368 if(request_irq(dev->irq,meth_interrupt,SA_SHIRQ,meth_str,dev)){
369 printk(KERN_ERR "%s: Can't get irq %d\n", dev->name, dev->irq);
372 netif_start_queue(dev);
373 DPRINTK("Opened... DMA control=0x%08lx\n", regs->dma_ctrl);
377 int meth_release(struct net_device *dev)
379 netif_stop_queue(dev); /* can't transmit any more */
381 ((meth_private*)(dev->priv))->regs->dma_ctrl&=
382 ~(METH_DMA_TX_EN|METH_DMA_TX_INT_EN|
383 METH_DMA_RX_EN|METH_DMA_RX_INT_EN);
384 free_irq(dev->irq, dev);
390 * Configuration changes (passed on by ifconfig)
392 int meth_config(struct net_device *dev, struct ifmap *map)
394 if (dev->flags & IFF_UP) /* can't act on a running interface */
397 /* Don't allow changing the I/O address */
398 if (map->base_addr != dev->base_addr) {
399 printk(KERN_WARNING "meth: Can't change I/O address\n");
403 /* Allow changing the IRQ */
404 if (map->irq != dev->irq) {
405 printk(KERN_WARNING "meth: Can't change IRQ\n");
408 DPRINTK("Configured\n");
410 /* ignore other fields */
415 * Receive a packet: retrieve, encapsulate and pass over to upper levels
417 void meth_rx(struct net_device* dev)
420 struct meth_private *priv = (struct meth_private *) dev->priv;
423 // TEMP while((rxb=priv->rx_ring[priv->rx_write])->status.raw&0x8000000000000000){
424 while((rxb=priv->rx_ring[priv->rx_write])->status.raw&0x8000000000000000){
425 int len=rxb->status.parsed.rx_len - 4; /* omit CRC */
426 DPRINTK("(%i)\n",priv->rx_write);
427 /* length sanity check */
428 if(len < 60 || len > 1518) {
429 printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x.\n",
430 dev->name, priv->rx_write, rxb->status.raw);
431 priv->stats.rx_errors++;
432 priv->stats.rx_length_errors++;
434 if(!(rxb->status.raw&METH_RX_STATUS_ERRORS)){
435 skb=alloc_skb(len+2,GFP_ATOMIC);/* Should be atomic -- we are in interrupt */
437 /* Ouch! No memory! Drop packet on the floor */
438 DPRINTK("!!!>>>Ouch! Not enough Memory for RX buffer!\n");
439 priv->stats.rx_dropped++;
441 skb_reserve(skb, 2); /* align IP on 16B boundary */
442 memcpy(skb_put(skb, len), rxb->buf, len);
443 /* Write metadata, and then pass to the receive level */
445 skb->protocol = eth_type_trans(skb, dev);
446 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
448 DPRINTK("passing packet\n");
449 DPRINTK("len = %d rxb->status = %x\n",
450 len, rxb->status.raw);
452 dev->last_rx = jiffies;
453 priv->stats.rx_packets++;
454 priv->stats.rx_bytes+=len;
455 DPRINTK("There we go... Whew...\n");
458 priv->regs->rx_fifo=priv->rx_ring_dmas[priv->rx_write];
460 priv->rx_write=(priv->rx_write+1)&(RX_RING_ENTRIES-1);
464 static int meth_tx_full(struct net_device *dev)
466 struct meth_private *priv = (struct meth_private *) dev->priv;
468 return(priv->tx_count >= TX_RING_ENTRIES-1);
471 void meth_tx_cleanup(struct net_device* dev, int rptr)
473 meth_private *priv=dev->priv;
477 spin_lock(&priv->meth_lock);
480 priv->regs->dma_ctrl &= ~(METH_DMA_TX_INT_EN);
482 while(priv->tx_read != rptr){
483 skb = priv->tx_skbs[priv->tx_read];
484 status = &priv->tx_ring[priv->tx_read];
485 if(!status->header.res.sent)
487 if(status->header.raw & METH_TX_STATUS_DONE) {
488 priv->stats.tx_packets++;
489 priv->stats.tx_bytes += skb->len;
491 dev_kfree_skb_irq(skb);
492 priv->tx_skbs[priv->tx_read] = NULL;
493 status->header.raw = 0;
494 priv->tx_read = (priv->tx_read+1)&(TX_RING_ENTRIES-1);
498 /* wake up queue if it was stopped */
499 if (netif_queue_stopped(dev) && ! meth_tx_full(dev)) {
500 netif_wake_queue(dev);
503 spin_unlock(priv->meth_lock);
507 * The typical interrupt entry point
509 void meth_interrupt(int irq, void *dev_id, struct pt_regs *pregs)
511 struct meth_private *priv;
513 u32 reg; /*Whole status register */
524 * As usual, check the "device" pointer for shared handlers.
525 * Then assign "struct device *dev"
527 struct net_device *dev = (struct net_device *)dev_id;
528 /* ... and check with hw if it's really ours */
530 if (!dev /*paranoid*/ ) return;
532 /* Lock the device */
533 priv = (struct meth_private *) dev->priv;
535 status.reg = priv->regs->int_flags;
537 DPRINTK("Interrupt, status %08x...\n",status.reg);
538 if (status.parsed.int_mask & METH_INT_RX_THRESHOLD) {
539 /* send it to meth_rx for handling */
543 if (status.parsed.int_mask & (METH_INT_TX_EMPTY|METH_INT_TX_PKT)) {
544 /* a transmission is over: free the skb */
545 meth_tx_cleanup(dev, status.parsed.tx_read);
547 /* check for errors too... */
548 if (status.parsed.int_mask & (METH_INT_TX_LINK_FAIL))
549 printk(KERN_WARNING "meth: link failure\n");
550 if (status.parsed.int_mask & (METH_INT_MEM_ERROR))
551 printk(KERN_WARNING "meth: memory error\n");
552 if (status.parsed.int_mask & (METH_INT_TX_ABORT))
553 printk(KERN_WARNING "meth: aborted\n");
554 DPRINTK("Interrupt handling done...\n");
556 priv->regs->int_flags=status.reg&0xff; /* clear interrupts */
560 * Transmits packets that fit into TX descriptor (are <=120B)
562 static void meth_tx_short_prepare(meth_private* priv, struct sk_buff* skb)
564 tx_packet *desc=&priv->tx_ring[priv->tx_write];
565 int len = (skb->len<ETH_ZLEN)?ETH_ZLEN:skb->len;
567 DPRINTK("preparing short packet\n");
568 /* maybe I should set whole thing to 0 first... */
569 memcpy(desc->data.dt+(120-len),skb->data,skb->len);
571 memset(desc->data.dt+120-len+skb->len,0,len-skb->len);
572 desc->header.raw=METH_TX_CMD_INT_EN|(len-1)|((128-len)<<16);
573 DPRINTK("desc=%016lx\n",desc->header.raw);
575 #define TX_CATBUF1 BIT(25)
576 static void meth_tx_1page_prepare(meth_private* priv, struct sk_buff* skb)
578 tx_packet *desc=&priv->tx_ring[priv->tx_write];
579 void *buffer_data = (void *)(((u64)skb->data + 7ULL) & (~7ULL));
580 int unaligned_len = (int)((u64)buffer_data - (u64)skb->data);
581 int buffer_len = skb->len - unaligned_len;
584 DPRINTK("preparing 1 page...\n");
585 DPRINTK("length=%d data=%p\n", skb->len, skb->data);
586 DPRINTK("unaligned_len=%d\n", unaligned_len);
587 DPRINTK("buffer_data=%p buffer_len=%d\n",
591 desc->header.raw=METH_TX_CMD_INT_EN|TX_CATBUF1|(skb->len-1);
595 memcpy(desc->data.dt+(120-unaligned_len),
596 skb->data, unaligned_len);
597 desc->header.raw |= (128-unaligned_len) << 16;
601 catbuf = pci_map_single(NULL,
605 DPRINTK("catbuf=%x\n", catbuf);
606 desc->data.cat_buf[0].form.start_addr = catbuf >> 3;
607 desc->data.cat_buf[0].form.len = buffer_len-1;
608 DPRINTK("desc=%016lx\n",desc->header.raw);
609 DPRINTK("cat_buf[0].raw=%016lx\n",desc->data.cat_buf[0].raw);
611 #define TX_CATBUF2 BIT(26)
612 static void meth_tx_2page_prepare(meth_private* priv, struct sk_buff* skb)
614 tx_packet *desc=&priv->tx_ring[priv->tx_write];
615 void *buffer1_data = (void *)(((u64)skb->data + 7ULL) & (~7ULL));
616 void *buffer2_data = (void *)PAGE_ALIGN((u64)skb->data);
617 int unaligned_len = (int)((u64)buffer1_data - (u64)skb->data);
618 int buffer1_len = (int)((u64)buffer2_data - (u64)buffer1_data);
619 int buffer2_len = skb->len - buffer1_len - unaligned_len;
620 dma_addr_t catbuf1, catbuf2;
622 DPRINTK("preparing 2 pages... \n");
623 DPRINTK("length=%d data=%p\n", skb->len, skb->data);
624 DPRINTK("unaligned_len=%d\n", unaligned_len);
625 DPRINTK("buffer1_data=%p buffer1_len=%d\n",
628 DPRINTK("buffer2_data=%p buffer2_len=%d\n",
632 desc->header.raw=METH_TX_CMD_INT_EN|TX_CATBUF1|TX_CATBUF2|(skb->len-1);
635 memcpy(desc->data.dt+(120-unaligned_len),
636 skb->data, unaligned_len);
637 desc->header.raw |= (128-unaligned_len) << 16;
641 catbuf1 = pci_map_single(NULL,
645 DPRINTK("catbuf1=%x\n", catbuf1);
646 desc->data.cat_buf[0].form.start_addr = catbuf1 >> 3;
647 desc->data.cat_buf[0].form.len = buffer1_len-1;
649 catbuf2 = pci_map_single(NULL,
653 DPRINTK("catbuf2=%x\n", catbuf2);
654 desc->data.cat_buf[1].form.start_addr = catbuf2 >> 3;
655 desc->data.cat_buf[1].form.len = buffer2_len-1;
656 DPRINTK("desc=%016lx\n",desc->header.raw);
657 DPRINTK("cat_buf[0].raw=%016lx\n",desc->data.cat_buf[0].raw);
658 DPRINTK("cat_buf[1].raw=%016lx\n",desc->data.cat_buf[1].raw);
662 void meth_add_to_tx_ring(meth_private *priv, struct sk_buff* skb)
664 DPRINTK("Transmitting data...\n");
665 if(skb->len <= 120) {
666 /* Whole packet fits into descriptor */
667 meth_tx_short_prepare(priv,skb);
668 } else if(PAGE_ALIGN((u64)skb->data) !=
669 PAGE_ALIGN((u64)skb->data+skb->len-1)) {
670 /* Packet crosses page boundary */
671 meth_tx_2page_prepare(priv,skb);
673 /* Packet is in one page */
674 meth_tx_1page_prepare(priv,skb);
677 /* Remember the skb, so we can free it at interrupt time */
678 priv->tx_skbs[priv->tx_write] = skb;
679 priv->tx_write = (priv->tx_write+1) & (TX_RING_ENTRIES-1);
680 priv->regs->tx_info.wptr = priv->tx_write;
682 /* Enable DMA transfer */
683 priv->regs->dma_ctrl |= METH_DMA_TX_INT_EN;
687 * Transmit a packet (called by the kernel)
689 int meth_tx(struct sk_buff *skb, struct net_device *dev)
691 struct meth_private *priv = (struct meth_private *) dev->priv;
693 spin_lock_irq(&priv->meth_lock);
695 meth_add_to_tx_ring(priv, skb);
696 dev->trans_start = jiffies; /* save the timestamp */
698 /* If TX ring is full, tell the upper layer to stop sending packets */
699 if (meth_tx_full(dev)) {
700 DPRINTK("TX full: stopping\n");
701 netif_stop_queue(dev);
704 spin_unlock_irq(&priv->meth_lock);
710 * Deal with a transmit timeout.
713 void meth_tx_timeout (struct net_device *dev)
715 struct meth_private *priv = (struct meth_private *) dev->priv;
717 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
719 /* Protect against concurrent rx interrupts */
720 spin_lock_irq(&priv->meth_lock);
722 /* Try to reset the adaptor. */
725 priv->stats.tx_errors++;
727 /* Clear all rings */
728 meth_free_tx_ring(priv);
729 meth_free_rx_ring(priv);
730 meth_init_tx_ring(priv);
731 meth_init_rx_ring(priv);
734 priv->regs->dma_ctrl|=METH_DMA_TX_EN|METH_DMA_RX_EN|METH_DMA_RX_INT_EN;
736 /* Enable interrupt */
737 spin_unlock_irq(&priv->meth_lock);
739 dev->trans_start = jiffies;
740 netif_wake_queue(dev);
748 int meth_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
756 * Return statistics to the caller
758 struct net_device_stats *meth_stats(struct net_device *dev)
760 struct meth_private *priv = (struct meth_private *) dev->priv;
765 * The init function (sometimes called probe).
766 * It is invoked by register_netdev()
768 int meth_init(struct net_device *dev)
773 * Then, assign other fields in dev, using ether_setup() and some
776 ether_setup(dev); /* assign some of the fields */
778 dev->open = meth_open;
779 dev->stop = meth_release;
780 dev->set_config = meth_config;
781 dev->hard_start_xmit = meth_tx;
782 dev->do_ioctl = meth_ioctl;
783 dev->get_stats = meth_stats;
784 #ifdef HAVE_TX_TIMEOUT
785 dev->tx_timeout = meth_tx_timeout;
786 dev->watchdog_timeo = timeout;
788 dev->irq = MACE_ETHERNET_IRQ;
789 SET_MODULE_OWNER(dev);
792 * Then, allocate the priv field. This encloses the statistics
793 * and a few private fields.
795 priv = kmalloc(sizeof(struct meth_private), GFP_KERNEL);
799 memset(priv, 0, sizeof(struct meth_private));
800 spin_lock_init(&((struct meth_private *) dev->priv)->meth_lock);
802 * Make the usual checks: check_region(), probe irq, ... -ENODEV
803 * should be returned if no device found. No resource should be
804 * grabbed: this is done on open().
806 priv->regs=(meth_regs*)SGI_MFE;
807 dev->base_addr=SGI_MFE;
808 priv->phy_addr = -1; /* No phy is known yet... */
810 /* Initialize the hardware */
811 if((ret=meth_reset(dev)) < 0)
814 /* Allocate the ring buffers */
815 if((ret=meth_init_tx_ring(priv))<0||(ret=meth_init_rx_ring(priv))<0){
816 meth_free_tx_ring(priv);
817 meth_free_rx_ring(priv);
821 printk("SGI O2 Fast Ethernet rev. %ld\n", priv->regs->mac_ctrl >> 29);
830 struct net_device meth_devs[1] = {
831 { init: meth_init, } /* init, nothing more */
835 * Finally, the module stuff
838 int meth_init_module(void)
840 int result, device_present = 0;
842 strcpy(meth_devs[0].name, "eth%d");
844 if ( (result = register_netdev(meth_devs)) )
845 printk("meth: error %i registering device \"%s\"\n",
846 result, meth_devs->name);
847 else device_present++;
852 return device_present ? 0 : -ENODEV;
855 void meth_cleanup(void)
857 kfree(meth_devs->priv);
858 unregister_netdev(meth_devs);
862 module_init(meth_init_module);
863 module_exit(meth_cleanup);