1 /* myri_sbus.h: MyriCOM MyriNET SBUS card driver.
3 * Copyright (C) 1996, 1999 David S. Miller (davem@redhat.com)
6 static char version[] =
7 "myri_sbus.c:v1.9 12/Sep/99 David S. Miller (davem@redhat.com)\n";
9 #include <linux/module.h>
11 #include <linux/config.h>
12 #include <linux/kernel.h>
13 #include <linux/sched.h>
14 #include <linux/types.h>
15 #include <linux/fcntl.h>
16 #include <linux/interrupt.h>
17 #include <linux/ptrace.h>
18 #include <linux/ioport.h>
20 #include <linux/slab.h>
21 #include <linux/string.h>
22 #include <linux/delay.h>
23 #include <linux/init.h>
25 #include <asm/system.h>
26 #include <asm/bitops.h>
29 #include <linux/errno.h>
30 #include <asm/byteorder.h>
32 #include <asm/idprom.h>
34 #include <asm/openprom.h>
35 #include <asm/oplib.h>
36 #include <asm/auxio.h>
37 #include <asm/pgtable.h>
40 #include <linux/netdevice.h>
41 #include <linux/etherdevice.h>
42 #include <linux/skbuff.h>
49 #include <asm/checksum.h>
51 #include "myri_sbus.h"
53 #include "myri_code.h"
55 /* #define DEBUG_DETECT */
56 /* #define DEBUG_IRQ */
57 /* #define DEBUG_TRANSMIT */
58 /* #define DEBUG_RECEIVE */
59 /* #define DEBUG_HEADER */
62 #define DET(x) printk x
68 #define DIRQ(x) printk x
74 #define DTX(x) printk x
80 #define DRX(x) printk x
86 #define DHDR(x) printk x
92 static struct myri_eth *root_myri_dev;
95 static void myri_reset_off(unsigned long lp, unsigned long cregs)
98 sbus_writel(0, lp + LANAI_EIMASK);
100 /* Turn RESET function off. */
101 sbus_writel(CONTROL_ROFF, cregs + MYRICTRL_CTRL);
104 static void myri_reset_on(unsigned long cregs)
106 /* Enable RESET function. */
107 sbus_writel(CONTROL_RON, cregs + MYRICTRL_CTRL);
110 sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL);
113 static void myri_disable_irq(unsigned long lp, unsigned long cregs)
115 sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL);
116 sbus_writel(0, lp + LANAI_EIMASK);
117 sbus_writel(ISTAT_HOST, lp + LANAI_ISTAT);
120 static void myri_enable_irq(unsigned long lp, unsigned long cregs)
122 sbus_writel(CONTROL_EIRQ, cregs + MYRICTRL_CTRL);
123 sbus_writel(ISTAT_HOST, lp + LANAI_EIMASK);
126 static inline void bang_the_chip(struct myri_eth *mp)
128 struct myri_shmem *shmem = mp->shmem;
129 unsigned long cregs = mp->cregs;
131 sbus_writel(1, &shmem->send);
132 sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL);
135 static int myri_do_handshake(struct myri_eth *mp)
137 struct myri_shmem *shmem = mp->shmem;
138 unsigned long cregs = mp->cregs;
139 struct myri_channel *chan = &shmem->channel;
142 DET(("myri_do_handshake: "));
143 if (sbus_readl(&chan->state) == STATE_READY) {
144 DET(("Already STATE_READY, failed.\n"));
145 return -1; /* We're hosed... */
148 myri_disable_irq(mp->lregs, cregs);
150 while (tick++ <= 25) {
154 DET(("shakedown, CONTROL_WON, "));
155 sbus_writel(1, &shmem->shakedown);
156 sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL);
158 softstate = sbus_readl(&chan->state);
159 DET(("chanstate[%08x] ", softstate));
160 if (softstate == STATE_READY) {
161 DET(("wakeup successful, "));
165 if (softstate != STATE_WFN) {
166 DET(("not WFN setting that, "));
167 sbus_writel(STATE_WFN, &chan->state);
173 myri_enable_irq(mp->lregs, cregs);
176 DET(("25 ticks we lose, failure.\n"));
183 static int myri_load_lanai(struct myri_eth *mp)
185 struct net_device *dev = mp->dev;
186 struct myri_shmem *shmem = mp->shmem;
190 myri_disable_irq(mp->lregs, mp->cregs);
191 myri_reset_on(mp->cregs);
193 rptr = (unsigned char *) mp->lanai;
194 for (i = 0; i < mp->eeprom.ramsz; i++)
195 sbus_writeb(0, &rptr[i]);
197 if (mp->eeprom.cpuvers >= CPUVERS_3_0)
198 sbus_writel(mp->eeprom.cval, mp->lregs + LANAI_CVAL);
200 /* Load executable code. */
201 for (i = 0; i < sizeof(lanai4_code); i++)
202 sbus_writeb(lanai4_code[i], &rptr[(lanai4_code_off * 2) + i]);
204 /* Load data segment. */
205 for (i = 0; i < sizeof(lanai4_data); i++)
206 sbus_writeb(lanai4_data[i], &rptr[(lanai4_data_off * 2) + i]);
208 /* Set device address. */
209 sbus_writeb(0, &shmem->addr[0]);
210 sbus_writeb(0, &shmem->addr[1]);
211 for (i = 0; i < 6; i++)
212 sbus_writeb(dev->dev_addr[i],
213 &shmem->addr[i + 2]);
215 /* Set SBUS bursts and interrupt mask. */
216 sbus_writel(((mp->myri_bursts & 0xf8) >> 3), &shmem->burst);
217 sbus_writel(SHMEM_IMASK_RX, &shmem->imask);
219 /* Release the LANAI. */
220 myri_disable_irq(mp->lregs, mp->cregs);
221 myri_reset_off(mp->lregs, mp->cregs);
222 myri_disable_irq(mp->lregs, mp->cregs);
224 /* Wait for the reset to complete. */
225 for (i = 0; i < 5000; i++) {
226 if (sbus_readl(&shmem->channel.state) != STATE_READY)
233 printk(KERN_ERR "myricom: Chip would not reset after firmware load.\n");
235 i = myri_do_handshake(mp);
237 printk(KERN_ERR "myricom: Handshake with LANAI failed.\n");
239 if (mp->eeprom.cpuvers == CPUVERS_4_0)
240 sbus_writel(0, mp->lregs + LANAI_VERS);
245 static void myri_clean_rings(struct myri_eth *mp)
247 struct sendq *sq = mp->sq;
248 struct recvq *rq = mp->rq;
251 sbus_writel(0, &rq->tail);
252 sbus_writel(0, &rq->head);
253 for (i = 0; i < (RX_RING_SIZE+1); i++) {
254 if (mp->rx_skbs[i] != NULL) {
255 struct myri_rxd *rxd = &rq->myri_rxd[i];
258 dma_addr = sbus_readl(&rxd->myri_scatters[0].addr);
259 sbus_unmap_single(mp->myri_sdev, dma_addr, RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE);
260 dev_kfree_skb(mp->rx_skbs[i]);
261 mp->rx_skbs[i] = NULL;
266 sbus_writel(0, &sq->tail);
267 sbus_writel(0, &sq->head);
268 for (i = 0; i < TX_RING_SIZE; i++) {
269 if (mp->tx_skbs[i] != NULL) {
270 struct sk_buff *skb = mp->tx_skbs[i];
271 struct myri_txd *txd = &sq->myri_txd[i];
274 dma_addr = sbus_readl(&txd->myri_gathers[0].addr);
275 sbus_unmap_single(mp->myri_sdev, dma_addr, (skb->len + 3) & ~3, SBUS_DMA_TODEVICE);
276 dev_kfree_skb(mp->tx_skbs[i]);
277 mp->tx_skbs[i] = NULL;
282 static void myri_init_rings(struct myri_eth *mp, int from_irq)
284 struct recvq *rq = mp->rq;
285 struct myri_rxd *rxd = &rq->myri_rxd[0];
286 struct net_device *dev = mp->dev;
287 int gfp_flags = GFP_KERNEL;
290 if (from_irq || in_interrupt())
291 gfp_flags = GFP_ATOMIC;
293 myri_clean_rings(mp);
294 for (i = 0; i < RX_RING_SIZE; i++) {
295 struct sk_buff *skb = myri_alloc_skb(RX_ALLOC_SIZE, gfp_flags);
300 mp->rx_skbs[i] = skb;
302 skb_put(skb, RX_ALLOC_SIZE);
304 dma_addr = sbus_map_single(mp->myri_sdev, skb->data, RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE);
305 sbus_writel(dma_addr, &rxd[i].myri_scatters[0].addr);
306 sbus_writel(RX_ALLOC_SIZE, &rxd[i].myri_scatters[0].len);
307 sbus_writel(i, &rxd[i].ctx);
308 sbus_writel(1, &rxd[i].num_sg);
310 sbus_writel(0, &rq->head);
311 sbus_writel(RX_RING_SIZE, &rq->tail);
314 static int myri_init(struct myri_eth *mp, int from_irq)
316 myri_init_rings(mp, from_irq);
320 static void myri_is_not_so_happy(struct myri_eth *mp)
325 static void dump_ehdr(struct ethhdr *ehdr)
327 printk("ehdr[h_dst(%02x:%02x:%02x:%02x:%02x:%02x)"
328 "h_source(%02x:%02x:%02x:%02x:%02x:%02x)h_proto(%04x)]\n",
329 ehdr->h_dest[0], ehdr->h_dest[1], ehdr->h_dest[2],
330 ehdr->h_dest[3], ehdr->h_dest[4], ehdr->h_dest[4],
331 ehdr->h_source[0], ehdr->h_source[1], ehdr->h_source[2],
332 ehdr->h_source[3], ehdr->h_source[4], ehdr->h_source[4],
336 static void dump_ehdr_and_myripad(unsigned char *stuff)
338 struct ethhdr *ehdr = (struct ethhdr *) (stuff + 2);
340 printk("pad[%02x:%02x]", stuff[0], stuff[1]);
341 printk("ehdr[h_dst(%02x:%02x:%02x:%02x:%02x:%02x)"
342 "h_source(%02x:%02x:%02x:%02x:%02x:%02x)h_proto(%04x)]\n",
343 ehdr->h_dest[0], ehdr->h_dest[1], ehdr->h_dest[2],
344 ehdr->h_dest[3], ehdr->h_dest[4], ehdr->h_dest[4],
345 ehdr->h_source[0], ehdr->h_source[1], ehdr->h_source[2],
346 ehdr->h_source[3], ehdr->h_source[4], ehdr->h_source[4],
351 static void myri_tx(struct myri_eth *mp, struct net_device *dev)
353 struct sendq *sq = mp->sq;
354 int entry = mp->tx_old;
355 int limit = sbus_readl(&sq->head);
357 DTX(("entry[%d] limit[%d] ", entry, limit));
360 while (entry != limit) {
361 struct sk_buff *skb = mp->tx_skbs[entry];
364 DTX(("SKB[%d] ", entry));
365 dma_addr = sbus_readl(&sq->myri_txd[entry].myri_gathers[0].addr);
366 sbus_unmap_single(mp->myri_sdev, dma_addr, skb->len, SBUS_DMA_TODEVICE);
368 mp->tx_skbs[entry] = NULL;
369 mp->enet_stats.tx_packets++;
370 entry = NEXT_TX(entry);
375 /* Determine the packet's protocol ID. The rule here is that we
376 * assume 802.3 if the type field is short enough to be a length.
377 * This is normal practice and works for any 'now in use' protocol.
379 static unsigned short myri_type_trans(struct sk_buff *skb, struct net_device *dev)
384 skb->mac.raw = (((unsigned char *)skb->data) + MYRI_PAD_LEN);
385 skb_pull(skb, dev->hard_header_len);
386 eth = skb->mac.ethernet;
389 DHDR(("myri_type_trans: "));
392 if (*eth->h_dest & 1) {
393 if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN)==0)
394 skb->pkt_type = PACKET_BROADCAST;
396 skb->pkt_type = PACKET_MULTICAST;
397 } else if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
398 if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
399 skb->pkt_type = PACKET_OTHERHOST;
402 if (ntohs(eth->h_proto) >= 1536)
407 /* This is a magic hack to spot IPX packets. Older Novell breaks
408 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
409 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
410 * won't work for fault tolerant netware but does for the rest.
412 if (*(unsigned short *)rawp == 0xFFFF)
413 return htons(ETH_P_802_3);
416 return htons(ETH_P_802_2);
419 static void myri_rx(struct myri_eth *mp, struct net_device *dev)
421 struct recvq *rq = mp->rq;
422 struct recvq *rqa = mp->rqack;
423 int entry = sbus_readl(&rqa->head);
424 int limit = sbus_readl(&rqa->tail);
427 DRX(("entry[%d] limit[%d] ", entry, limit));
432 while (entry != limit) {
433 struct myri_rxd *rxdack = &rqa->myri_rxd[entry];
434 u32 csum = sbus_readl(&rxdack->csum);
435 int len = sbus_readl(&rxdack->myri_scatters[0].len);
436 int index = sbus_readl(&rxdack->ctx);
437 struct myri_rxd *rxd = &rq->myri_rxd[rq->tail];
438 struct sk_buff *skb = mp->rx_skbs[index];
441 sbus_writel(NEXT_RX(entry), &rqa->head);
443 /* Check for errors. */
444 DRX(("rxd[%d]: %p len[%d] csum[%08x] ", entry, rxd, len, csum));
445 sbus_dma_sync_single(mp->myri_sdev,
446 sbus_readl(&rxd->myri_scatters[0].addr),
447 RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE);
448 if (len < (ETH_HLEN + MYRI_PAD_LEN) || (skb->data[0] != MYRI_PAD_LEN)) {
450 mp->enet_stats.rx_errors++;
451 if (len < (ETH_HLEN + MYRI_PAD_LEN)) {
452 DRX(("BAD_LENGTH] "));
453 mp->enet_stats.rx_length_errors++;
455 DRX(("NO_PADDING] "));
456 mp->enet_stats.rx_frame_errors++;
459 /* Return it to the LANAI. */
463 mp->enet_stats.rx_dropped++;
464 sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
465 sbus_writel(index, &rxd->ctx);
466 sbus_writel(1, &rxd->num_sg);
467 sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
471 DRX(("len[%d] ", len));
472 if (len > RX_COPY_THRESHOLD) {
473 struct sk_buff *new_skb;
477 new_skb = myri_alloc_skb(RX_ALLOC_SIZE, GFP_ATOMIC);
478 if (new_skb == NULL) {
479 DRX(("skb_alloc(FAILED) "));
482 sbus_unmap_single(mp->myri_sdev,
483 sbus_readl(&rxd->myri_scatters[0].addr),
485 SBUS_DMA_FROMDEVICE);
486 mp->rx_skbs[index] = new_skb;
488 skb_put(new_skb, RX_ALLOC_SIZE);
489 dma_addr = sbus_map_single(mp->myri_sdev,
492 SBUS_DMA_FROMDEVICE);
493 sbus_writel(dma_addr, &rxd->myri_scatters[0].addr);
494 sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
495 sbus_writel(index, &rxd->ctx);
496 sbus_writel(1, &rxd->num_sg);
497 sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
499 /* Trim the original skb for the netif. */
500 DRX(("trim(%d) ", len));
503 struct sk_buff *copy_skb = dev_alloc_skb(len);
506 if (copy_skb == NULL) {
507 DRX(("dev_alloc_skb(FAILED) "));
510 /* DMA sync already done above. */
512 DRX(("resv_and_put "));
513 skb_put(copy_skb, len);
514 memcpy(copy_skb->data, skb->data, len);
516 /* Reuse original ring buffer. */
518 sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
519 sbus_writel(index, &rxd->ctx);
520 sbus_writel(1, &rxd->num_sg);
521 sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
526 /* Just like the happy meal we get checksums from this card. */
528 skb->ip_summed = CHECKSUM_UNNECESSARY; /* XXX */
530 skb->protocol = myri_type_trans(skb, dev);
531 DRX(("prot[%04x] netif_rx ", skb->protocol));
534 dev->last_rx = jiffies;
535 mp->enet_stats.rx_packets++;
536 mp->enet_stats.rx_bytes += len;
539 entry = NEXT_RX(entry);
543 static void myri_interrupt(int irq, void *dev_id, struct pt_regs *regs)
545 struct net_device *dev = (struct net_device *) dev_id;
546 struct myri_eth *mp = (struct myri_eth *) dev->priv;
547 unsigned long lregs = mp->lregs;
548 struct myri_channel *chan = &mp->shmem->channel;
551 status = sbus_readl(lregs + LANAI_ISTAT);
552 DIRQ(("myri_interrupt: status[%08x] ", status));
553 if (status & ISTAT_HOST) {
556 DIRQ(("IRQ_DISAB "));
557 myri_disable_irq(lregs, mp->cregs);
558 softstate = sbus_readl(&chan->state);
559 DIRQ(("state[%08x] ", softstate));
560 if (softstate != STATE_READY) {
561 DIRQ(("myri_not_so_happy "));
562 myri_is_not_so_happy(mp);
564 DIRQ(("\nmyri_rx: "));
566 DIRQ(("\nistat=ISTAT_HOST "));
567 sbus_writel(ISTAT_HOST, lregs + LANAI_ISTAT);
569 myri_enable_irq(lregs, mp->cregs);
574 static int myri_open(struct net_device *dev)
576 struct myri_eth *mp = (struct myri_eth *) dev->priv;
578 return myri_init(mp, in_interrupt());
581 static int myri_close(struct net_device *dev)
583 struct myri_eth *mp = (struct myri_eth *) dev->priv;
585 myri_clean_rings(mp);
589 static void myri_tx_timeout(struct net_device *dev)
591 struct myri_eth *mp = (struct myri_eth *) dev->priv;
593 printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
595 mp->enet_stats.tx_errors++;
597 netif_wake_queue(dev);
600 static int myri_start_xmit(struct sk_buff *skb, struct net_device *dev)
602 struct myri_eth *mp = (struct myri_eth *) dev->priv;
603 struct sendq *sq = mp->sq;
604 struct myri_txd *txd;
606 unsigned int head, tail;
610 DTX(("myri_start_xmit: "));
614 netif_stop_queue(dev);
616 /* This is just to prevent multiple PIO reads for TX_BUFFS_AVAIL. */
617 head = sbus_readl(&sq->head);
618 tail = sbus_readl(&sq->tail);
620 if (!TX_BUFFS_AVAIL(head, tail)) {
621 DTX(("no buffs available, returning 1\n"));
627 DHDR(("xmit[skbdata(%p)]\n", skb->data));
629 dump_ehdr_and_myripad(((unsigned char *) skb->data));
632 /* XXX Maybe this can go as well. */
636 len = (len + 4) & (~3);
639 entry = sbus_readl(&sq->tail);
641 txd = &sq->myri_txd[entry];
642 mp->tx_skbs[entry] = skb;
644 /* Must do this before we sbus map it. */
645 if (skb->data[MYRI_PAD_LEN] & 0x1) {
646 sbus_writew(0xffff, &txd->addr[0]);
647 sbus_writew(0xffff, &txd->addr[1]);
648 sbus_writew(0xffff, &txd->addr[2]);
649 sbus_writew(0xffff, &txd->addr[3]);
651 sbus_writew(0xffff, &txd->addr[0]);
652 sbus_writew((skb->data[0] << 8) | skb->data[1], &txd->addr[1]);
653 sbus_writew((skb->data[2] << 8) | skb->data[3], &txd->addr[2]);
654 sbus_writew((skb->data[4] << 8) | skb->data[5], &txd->addr[3]);
657 dma_addr = sbus_map_single(mp->myri_sdev, skb->data, len, SBUS_DMA_TODEVICE);
658 sbus_writel(dma_addr, &txd->myri_gathers[0].addr);
659 sbus_writel(len, &txd->myri_gathers[0].len);
660 sbus_writel(1, &txd->num_sg);
661 sbus_writel(KERNEL_CHANNEL, &txd->chan);
662 sbus_writel(len, &txd->len);
663 sbus_writel((u32)-1, &txd->csum_off);
664 sbus_writel(0, &txd->csum_field);
666 sbus_writel(NEXT_TX(entry), &sq->tail);
667 DTX(("BangTheChip "));
670 DTX(("tbusy=0, returning 0\n"));
671 netif_start_queue(dev);
672 restore_flags(flags);
676 /* Create the MyriNet MAC header for an arbitrary protocol layer
678 * saddr=NULL means use device source address
679 * daddr=NULL means leave destination address (eg unresolved arp)
681 static int myri_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
682 void *daddr, void *saddr, unsigned len)
684 struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
685 unsigned char *pad = (unsigned char *) skb_push(skb, MYRI_PAD_LEN);
688 DHDR(("myri_header: pad[%02x,%02x] ", pad[0], pad[1]));
692 /* Set the MyriNET padding identifier. */
693 pad[0] = MYRI_PAD_LEN;
696 /* Set the protocol type. For a packet of type ETH_P_802_3 we put the length
697 * in here instead. It is up to the 802.2 layer to carry protocol information.
699 if (type != ETH_P_802_3)
700 eth->h_proto = htons(type);
702 eth->h_proto = htons(len);
704 /* Set the source hardware address. */
706 memcpy(eth->h_source, saddr, dev->addr_len);
708 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
710 /* Anyway, the loopback-device should never use this function... */
711 if (dev->flags & IFF_LOOPBACK) {
713 for (i = 0; i < dev->addr_len; i++)
715 return(dev->hard_header_len);
719 memcpy(eth->h_dest, daddr, dev->addr_len);
720 return dev->hard_header_len;
722 return -dev->hard_header_len;
725 /* Rebuild the MyriNet MAC header. This is called after an ARP
726 * (or in future other address resolution) has completed on this
727 * sk_buff. We now let ARP fill in the other fields.
729 static int myri_rebuild_header(struct sk_buff *skb)
731 unsigned char *pad = (unsigned char *) skb->data;
732 struct ethhdr *eth = (struct ethhdr *) (pad + MYRI_PAD_LEN);
733 struct net_device *dev = skb->dev;
736 DHDR(("myri_rebuild_header: pad[%02x,%02x] ", pad[0], pad[1]));
740 /* Refill MyriNet padding identifiers, this is just being anal. */
741 pad[0] = MYRI_PAD_LEN;
744 switch (eth->h_proto)
747 case __constant_htons(ETH_P_IP):
748 return arp_find(eth->h_dest, skb);
753 "%s: unable to resolve type %X addresses.\n",
754 dev->name, (int)eth->h_proto);
756 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
764 int myri_header_cache(struct neighbour *neigh, struct hh_cache *hh)
766 unsigned short type = hh->hh_type;
767 unsigned char *pad = (unsigned char *) hh->hh_data;
768 struct ethhdr *eth = (struct ethhdr *) (pad + MYRI_PAD_LEN);
769 struct net_device *dev = neigh->dev;
771 if (type == __constant_htons(ETH_P_802_3))
774 /* Refill MyriNet padding identifiers, this is just being anal. */
775 pad[0] = MYRI_PAD_LEN;
779 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
780 memcpy(eth->h_dest, neigh->ha, dev->addr_len);
786 /* Called by Address Resolution module to notify changes in address. */
787 void myri_header_cache_update(struct hh_cache *hh, struct net_device *dev, unsigned char * haddr)
789 memcpy(((u8*)hh->hh_data) + 2, haddr, dev->addr_len);
792 static int myri_change_mtu(struct net_device *dev, int new_mtu)
794 if ((new_mtu < (ETH_HLEN + MYRI_PAD_LEN)) || (new_mtu > MYRINET_MTU))
800 static struct net_device_stats *myri_get_stats(struct net_device *dev)
801 { return &(((struct myri_eth *)dev->priv)->enet_stats); }
803 static void myri_set_multicast(struct net_device *dev)
805 /* Do nothing, all MyriCOM nodes transmit multicast frames
806 * as broadcast packets...
810 static inline void set_boardid_from_idprom(struct myri_eth *mp, int num)
812 mp->eeprom.id[0] = 0;
813 mp->eeprom.id[1] = idprom->id_machtype;
814 mp->eeprom.id[2] = (idprom->id_sernum >> 16) & 0xff;
815 mp->eeprom.id[3] = (idprom->id_sernum >> 8) & 0xff;
816 mp->eeprom.id[4] = (idprom->id_sernum >> 0) & 0xff;
817 mp->eeprom.id[5] = num;
820 static inline void determine_reg_space_size(struct myri_eth *mp)
822 switch(mp->eeprom.cpuvers) {
827 mp->reg_size = (3 * 128 * 1024) + 4096;
832 mp->reg_size = ((4096<<1) + mp->eeprom.ramsz);
838 printk("myricom: AIEEE weird cpu version %04x assuming pre4.0\n",
840 mp->reg_size = (3 * 128 * 1024) + 4096;
845 static void dump_eeprom(struct myri_eth *mp)
847 printk("EEPROM: clockval[%08x] cpuvers[%04x] "
848 "id[%02x,%02x,%02x,%02x,%02x,%02x]\n",
849 mp->eeprom.cval, mp->eeprom.cpuvers,
850 mp->eeprom.id[0], mp->eeprom.id[1], mp->eeprom.id[2],
851 mp->eeprom.id[3], mp->eeprom.id[4], mp->eeprom.id[5]);
852 printk("EEPROM: ramsz[%08x]\n", mp->eeprom.ramsz);
853 printk("EEPROM: fvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
854 mp->eeprom.fvers[0], mp->eeprom.fvers[1], mp->eeprom.fvers[2],
855 mp->eeprom.fvers[3], mp->eeprom.fvers[4], mp->eeprom.fvers[5],
856 mp->eeprom.fvers[6], mp->eeprom.fvers[7]);
857 printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
858 mp->eeprom.fvers[8], mp->eeprom.fvers[9], mp->eeprom.fvers[10],
859 mp->eeprom.fvers[11], mp->eeprom.fvers[12], mp->eeprom.fvers[13],
860 mp->eeprom.fvers[14], mp->eeprom.fvers[15]);
861 printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
862 mp->eeprom.fvers[16], mp->eeprom.fvers[17], mp->eeprom.fvers[18],
863 mp->eeprom.fvers[19], mp->eeprom.fvers[20], mp->eeprom.fvers[21],
864 mp->eeprom.fvers[22], mp->eeprom.fvers[23]);
865 printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n",
866 mp->eeprom.fvers[24], mp->eeprom.fvers[25], mp->eeprom.fvers[26],
867 mp->eeprom.fvers[27], mp->eeprom.fvers[28], mp->eeprom.fvers[29],
868 mp->eeprom.fvers[30], mp->eeprom.fvers[31]);
869 printk("EEPROM: mvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
870 mp->eeprom.mvers[0], mp->eeprom.mvers[1], mp->eeprom.mvers[2],
871 mp->eeprom.mvers[3], mp->eeprom.mvers[4], mp->eeprom.mvers[5],
872 mp->eeprom.mvers[6], mp->eeprom.mvers[7]);
873 printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n",
874 mp->eeprom.mvers[8], mp->eeprom.mvers[9], mp->eeprom.mvers[10],
875 mp->eeprom.mvers[11], mp->eeprom.mvers[12], mp->eeprom.mvers[13],
876 mp->eeprom.mvers[14], mp->eeprom.mvers[15]);
877 printk("EEPROM: dlval[%04x] brd_type[%04x] bus_type[%04x] prod_code[%04x]\n",
878 mp->eeprom.dlval, mp->eeprom.brd_type, mp->eeprom.bus_type,
879 mp->eeprom.prod_code);
880 printk("EEPROM: serial_num[%08x]\n", mp->eeprom.serial_num);
884 static int __init myri_ether_init(struct net_device *dev, struct sbus_dev *sdev, int num)
886 static unsigned version_printed;
888 unsigned char prop_buf[32];
891 DET(("myri_ether_init(%p,%p,%d):\n", dev, sdev, num));
892 dev = init_etherdev(0, sizeof(struct myri_eth));
897 if (version_printed++ == 0)
900 printk("%s: MyriCOM MyriNET Ethernet ", dev->name);
902 mp = (struct myri_eth *) dev->priv;
903 mp->myri_sdev = sdev;
905 /* Clean out skb arrays. */
906 for (i = 0; i < (RX_RING_SIZE + 1); i++)
907 mp->rx_skbs[i] = NULL;
909 for (i = 0; i < TX_RING_SIZE; i++)
910 mp->tx_skbs[i] = NULL;
912 /* First check for EEPROM information. */
913 i = prom_getproperty(sdev->prom_node, "myrinet-eeprom-info",
914 (char *)&mp->eeprom, sizeof(struct myri_eeprom));
915 DET(("prom_getprop(myrinet-eeprom-info) returns %d\n", i));
916 if (i == 0 || i == -1) {
917 /* No eeprom property, must cook up the values ourselves. */
918 DET(("No EEPROM: "));
919 mp->eeprom.bus_type = BUS_TYPE_SBUS;
920 mp->eeprom.cpuvers = prom_getintdefault(sdev->prom_node,"cpu_version",0);
921 mp->eeprom.cval = prom_getintdefault(sdev->prom_node,"clock_value",0);
922 mp->eeprom.ramsz = prom_getintdefault(sdev->prom_node,"sram_size",0);
923 DET(("cpuvers[%d] cval[%d] ramsz[%d]\n", mp->eeprom.cpuvers,
924 mp->eeprom.cval, mp->eeprom.ramsz));
925 if (mp->eeprom.cpuvers == 0) {
926 DET(("EEPROM: cpuvers was zero, setting to %04x\n",CPUVERS_2_3));
927 mp->eeprom.cpuvers = CPUVERS_2_3;
929 if (mp->eeprom.cpuvers < CPUVERS_3_0) {
930 DET(("EEPROM: cpuvers < CPUVERS_3_0, clockval set to zero.\n"));
933 if (mp->eeprom.ramsz == 0) {
934 DET(("EEPROM: ramsz == 0, setting to 128k\n"));
935 mp->eeprom.ramsz = (128 * 1024);
937 i = prom_getproperty(sdev->prom_node, "myrinet-board-id",
939 DET(("EEPROM: prom_getprop(myrinet-board-id) returns %d\n", i));
940 if ((i != 0) && (i != -1))
941 memcpy(&mp->eeprom.id[0], &prop_buf[0], 6);
943 set_boardid_from_idprom(mp, num);
944 i = prom_getproperty(sdev->prom_node, "fpga_version",
945 &mp->eeprom.fvers[0], 32);
946 DET(("EEPROM: prom_getprop(fpga_version) returns %d\n", i));
947 if (i == 0 || i == -1)
948 memset(&mp->eeprom.fvers[0], 0, 32);
950 if (mp->eeprom.cpuvers == CPUVERS_4_1) {
951 DET(("EEPROM: cpuvers CPUVERS_4_1, "));
952 if (mp->eeprom.ramsz == (128 * 1024)) {
953 DET(("ramsize 128k, setting to 256k, "));
954 mp->eeprom.ramsz = (256 * 1024);
956 if ((mp->eeprom.cval==0x40414041)||(mp->eeprom.cval==0x90449044)){
957 DET(("changing cval from %08x to %08x ",
958 mp->eeprom.cval, 0x50e450e4));
959 mp->eeprom.cval = 0x50e450e4;
968 for (i = 0; i < 6; i++)
970 dev->dev_addr[i] = mp->eeprom.id[i],
974 determine_reg_space_size(mp);
976 /* Map in the MyriCOM register/localram set. */
977 if (mp->eeprom.cpuvers < CPUVERS_4_0) {
978 /* XXX Makes no sense, if control reg is non-existant this
979 * XXX driver cannot function at all... maybe pre-4.0 is
980 * XXX only a valid version for PCI cards? Ask feldy...
982 DET(("Mapping regs for cpuvers < CPUVERS_4_0\n"));
983 mp->regs = sbus_ioremap(&sdev->resource[0], 0,
984 mp->reg_size, "MyriCOM Regs");
986 printk("MyriCOM: Cannot map MyriCOM registers.\n");
989 mp->lanai = (unsigned short *) (mp->regs + (256 * 1024));
990 mp->lanai3 = (unsigned int *) mp->lanai;
991 mp->lregs = (unsigned long) &mp->lanai[0x10000];
993 DET(("Mapping regs for cpuvers >= CPUVERS_4_0\n"));
994 mp->cregs = sbus_ioremap(&sdev->resource[0], 0,
995 PAGE_SIZE, "MyriCOM Control Regs");
996 mp->lregs = sbus_ioremap(&sdev->resource[0], (256 * 1024),
997 PAGE_SIZE, "MyriCOM LANAI Regs");
998 mp->lanai = (unsigned short *)
999 sbus_ioremap(&sdev->resource[0], (512 * 1024),
1000 mp->eeprom.ramsz, "MyriCOM SRAM");
1001 mp->lanai3 = (unsigned int *) mp->lanai;
1003 DET(("Registers mapped: cregs[%lx] lregs[%lx] lanai[%p] lanai3[%p]\n",
1004 mp->cregs, mp->lregs, mp->lanai, mp->lanai3));
1006 if (mp->eeprom.cpuvers >= CPUVERS_4_0)
1007 mp->shmem_base = 0xf000;
1009 mp->shmem_base = 0x8000;
1011 DET(("Shared memory base is %04x, ", mp->shmem_base));
1013 mp->shmem = (struct myri_shmem *) &mp->lanai[mp->shmem_base];
1014 DET(("shmem mapped at %p\n", mp->shmem));
1016 mp->rqack = &mp->shmem->channel.recvqa;
1017 mp->rq = &mp->shmem->channel.recvq;
1018 mp->sq = &mp->shmem->channel.sendq;
1020 /* Reset the board. */
1021 DET(("Resetting LANAI\n"));
1022 myri_reset_off(mp->lregs, mp->cregs);
1023 myri_reset_on(mp->cregs);
1025 /* Turn IRQ's off. */
1026 myri_disable_irq(mp->lregs, mp->cregs);
1028 /* Reset once more. */
1029 myri_reset_on(mp->cregs);
1031 /* Get the supported DVMA burst sizes from our SBUS. */
1032 mp->myri_bursts = prom_getintdefault(mp->myri_sdev->bus->prom_node,
1033 "burst-sizes", 0x00);
1035 if (!sbus_can_burst64(sdev))
1036 mp->myri_bursts &= ~(DMA_BURST64);
1038 DET(("MYRI bursts %02x\n", mp->myri_bursts));
1040 /* Encode SBUS interrupt level in second control register. */
1041 i = prom_getint(sdev->prom_node, "interrupts");
1044 DET(("prom_getint(interrupts)==%d, irqlvl set to %04x\n",
1047 sbus_writel((1 << i), mp->cregs + MYRICTRL_IRQLVL);
1050 dev->open = &myri_open;
1051 dev->stop = &myri_close;
1052 dev->hard_start_xmit = &myri_start_xmit;
1053 dev->tx_timeout = &myri_tx_timeout;
1054 dev->watchdog_timeo = 5*HZ;
1055 dev->get_stats = &myri_get_stats;
1056 dev->set_multicast_list = &myri_set_multicast;
1057 dev->irq = sdev->irqs[0];
1059 /* Register interrupt handler now. */
1060 DET(("Requesting MYRIcom IRQ line.\n"));
1061 if (request_irq(dev->irq, &myri_interrupt,
1062 SA_SHIRQ, "MyriCOM Ethernet", (void *) dev)) {
1063 printk("MyriCOM: Cannot register interrupt handler.\n");
1067 DET(("ether_setup()\n"));
1070 dev->mtu = MYRINET_MTU;
1071 dev->change_mtu = myri_change_mtu;
1072 dev->hard_header = myri_header;
1073 dev->rebuild_header = myri_rebuild_header;
1074 dev->hard_header_len = (ETH_HLEN + MYRI_PAD_LEN);
1075 dev->hard_header_cache = myri_header_cache;
1076 dev->header_cache_update= myri_header_cache_update;
1078 /* Load code onto the LANai. */
1079 DET(("Loading LANAI firmware\n"));
1080 myri_load_lanai(mp);
1083 dev->ifindex = dev_new_index();
1084 mp->next_module = root_myri_dev;
1088 err: unregister_netdev(dev);
1093 static int __init myri_sbus_match(struct sbus_dev *sdev)
1095 char *name = sdev->prom_name;
1097 if (!strcmp(name, "MYRICOM,mlanai") ||
1098 !strcmp(name, "myri"))
1104 static int __init myri_sbus_probe(void)
1106 struct net_device *dev = NULL;
1107 struct sbus_bus *bus;
1108 struct sbus_dev *sdev = 0;
1113 root_myri_dev = NULL;
1120 for_each_sbus(bus) {
1121 for_each_sbusdev(sdev, bus) {
1124 if (myri_sbus_match(sdev)) {
1126 DET(("Found myricom myrinet as %s\n", sdev->prom_name));
1127 if ((v = myri_ether_init(dev, sdev, (cards - 1))))
1137 static void __exit myri_sbus_cleanup(void)
1140 /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
1141 while (root_myri_dev) {
1142 struct myri_eth *next = root_myri_dev->next_module;
1144 unregister_netdev(root_myri_dev->dev);
1145 kfree(root_myri_dev->dev);
1146 root_myri_dev = next;
1151 module_init(myri_sbus_probe);
1152 module_exit(myri_sbus_cleanup);
1153 MODULE_LICENSE("GPL");