1 /* myri_sbus.c: MyriCOM MyriNET SBUS card driver.
3 * Copyright (C) 1996, 1999, 2006, 2008 David S. Miller (davem@davemloft.net)
6 static char version[] =
7 "myri_sbus.c:v2.0 June 23, 2006 David S. Miller (davem@davemloft.net)\n";
9 #include <linux/module.h>
10 #include <linux/errno.h>
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/fcntl.h>
14 #include <linux/interrupt.h>
15 #include <linux/ioport.h>
17 #include <linux/string.h>
18 #include <linux/delay.h>
19 #include <linux/init.h>
20 #include <linux/netdevice.h>
21 #include <linux/etherdevice.h>
22 #include <linux/skbuff.h>
23 #include <linux/bitops.h>
24 #include <linux/dma-mapping.h>
26 #include <linux/of_device.h>
27 #include <linux/firmware.h>
28 #include <linux/gfp.h>
35 #include <asm/system.h>
38 #include <asm/byteorder.h>
39 #include <asm/idprom.h>
40 #include <asm/openprom.h>
41 #include <asm/oplib.h>
42 #include <asm/auxio.h>
43 #include <asm/pgtable.h>
46 #include "myri_sbus.h"
48 /* #define DEBUG_DETECT */
49 /* #define DEBUG_IRQ */
50 /* #define DEBUG_TRANSMIT */
51 /* #define DEBUG_RECEIVE */
52 /* #define DEBUG_HEADER */
55 #define DET(x) printk x
61 #define DIRQ(x) printk x
67 #define DTX(x) printk x
73 #define DRX(x) printk x
79 #define DHDR(x) printk x
85 #define FWNAME "myricom/lanai.bin"
87 static void myri_reset_off(void __iomem *lp, void __iomem *cregs)
90 sbus_writel(0, lp + LANAI_EIMASK);
92 /* Turn RESET function off. */
93 sbus_writel(CONTROL_ROFF, cregs + MYRICTRL_CTRL);
96 static void myri_reset_on(void __iomem *cregs)
98 /* Enable RESET function. */
99 sbus_writel(CONTROL_RON, cregs + MYRICTRL_CTRL);
102 sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL);
105 static void myri_disable_irq(void __iomem *lp, void __iomem *cregs)
107 sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL);
108 sbus_writel(0, lp + LANAI_EIMASK);
109 sbus_writel(ISTAT_HOST, lp + LANAI_ISTAT);
112 static void myri_enable_irq(void __iomem *lp, void __iomem *cregs)
114 sbus_writel(CONTROL_EIRQ, cregs + MYRICTRL_CTRL);
115 sbus_writel(ISTAT_HOST, lp + LANAI_EIMASK);
118 static inline void bang_the_chip(struct myri_eth *mp)
120 struct myri_shmem __iomem *shmem = mp->shmem;
121 void __iomem *cregs = mp->cregs;
123 sbus_writel(1, &shmem->send);
124 sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL);
127 static int myri_do_handshake(struct myri_eth *mp)
129 struct myri_shmem __iomem *shmem = mp->shmem;
130 void __iomem *cregs = mp->cregs;
131 struct myri_channel __iomem *chan = &shmem->channel;
134 DET(("myri_do_handshake: "));
135 if (sbus_readl(&chan->state) == STATE_READY) {
136 DET(("Already STATE_READY, failed.\n"));
137 return -1; /* We're hosed... */
140 myri_disable_irq(mp->lregs, cregs);
142 while (tick++ < 25) {
146 DET(("shakedown, CONTROL_WON, "));
147 sbus_writel(1, &shmem->shakedown);
148 sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL);
150 softstate = sbus_readl(&chan->state);
151 DET(("chanstate[%08x] ", softstate));
152 if (softstate == STATE_READY) {
153 DET(("wakeup successful, "));
157 if (softstate != STATE_WFN) {
158 DET(("not WFN setting that, "));
159 sbus_writel(STATE_WFN, &chan->state);
165 myri_enable_irq(mp->lregs, cregs);
168 DET(("25 ticks we lose, failure.\n"));
175 static int __devinit myri_load_lanai(struct myri_eth *mp)
177 const struct firmware *fw;
178 struct net_device *dev = mp->dev;
179 struct myri_shmem __iomem *shmem = mp->shmem;
181 int i, lanai4_data_size;
183 myri_disable_irq(mp->lregs, mp->cregs);
184 myri_reset_on(mp->cregs);
187 for (i = 0; i < mp->eeprom.ramsz; i++)
188 sbus_writeb(0, rptr + i);
190 if (mp->eeprom.cpuvers >= CPUVERS_3_0)
191 sbus_writel(mp->eeprom.cval, mp->lregs + LANAI_CVAL);
193 i = request_firmware(&fw, FWNAME, &mp->myri_op->dev);
195 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
200 printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
202 release_firmware(fw);
205 lanai4_data_size = fw->data[0] << 8 | fw->data[1];
207 /* Load executable code. */
208 for (i = 2; i < fw->size; i++)
209 sbus_writeb(fw->data[i], rptr++);
211 /* Load data segment. */
212 for (i = 0; i < lanai4_data_size; i++)
213 sbus_writeb(0, rptr++);
215 /* Set device address. */
216 sbus_writeb(0, &shmem->addr[0]);
217 sbus_writeb(0, &shmem->addr[1]);
218 for (i = 0; i < 6; i++)
219 sbus_writeb(dev->dev_addr[i],
220 &shmem->addr[i + 2]);
222 /* Set SBUS bursts and interrupt mask. */
223 sbus_writel(((mp->myri_bursts & 0xf8) >> 3), &shmem->burst);
224 sbus_writel(SHMEM_IMASK_RX, &shmem->imask);
226 /* Release the LANAI. */
227 myri_disable_irq(mp->lregs, mp->cregs);
228 myri_reset_off(mp->lregs, mp->cregs);
229 myri_disable_irq(mp->lregs, mp->cregs);
231 /* Wait for the reset to complete. */
232 for (i = 0; i < 5000; i++) {
233 if (sbus_readl(&shmem->channel.state) != STATE_READY)
240 printk(KERN_ERR "myricom: Chip would not reset after firmware load.\n");
242 i = myri_do_handshake(mp);
244 printk(KERN_ERR "myricom: Handshake with LANAI failed.\n");
246 if (mp->eeprom.cpuvers == CPUVERS_4_0)
247 sbus_writel(0, mp->lregs + LANAI_VERS);
249 release_firmware(fw);
253 static void myri_clean_rings(struct myri_eth *mp)
255 struct sendq __iomem *sq = mp->sq;
256 struct recvq __iomem *rq = mp->rq;
259 sbus_writel(0, &rq->tail);
260 sbus_writel(0, &rq->head);
261 for (i = 0; i < (RX_RING_SIZE+1); i++) {
262 if (mp->rx_skbs[i] != NULL) {
263 struct myri_rxd __iomem *rxd = &rq->myri_rxd[i];
266 dma_addr = sbus_readl(&rxd->myri_scatters[0].addr);
267 dma_unmap_single(&mp->myri_op->dev, dma_addr,
268 RX_ALLOC_SIZE, DMA_FROM_DEVICE);
269 dev_kfree_skb(mp->rx_skbs[i]);
270 mp->rx_skbs[i] = NULL;
275 sbus_writel(0, &sq->tail);
276 sbus_writel(0, &sq->head);
277 for (i = 0; i < TX_RING_SIZE; i++) {
278 if (mp->tx_skbs[i] != NULL) {
279 struct sk_buff *skb = mp->tx_skbs[i];
280 struct myri_txd __iomem *txd = &sq->myri_txd[i];
283 dma_addr = sbus_readl(&txd->myri_gathers[0].addr);
284 dma_unmap_single(&mp->myri_op->dev, dma_addr,
287 dev_kfree_skb(mp->tx_skbs[i]);
288 mp->tx_skbs[i] = NULL;
293 static void myri_init_rings(struct myri_eth *mp, int from_irq)
295 struct recvq __iomem *rq = mp->rq;
296 struct myri_rxd __iomem *rxd = &rq->myri_rxd[0];
297 struct net_device *dev = mp->dev;
298 gfp_t gfp_flags = GFP_KERNEL;
301 if (from_irq || in_interrupt())
302 gfp_flags = GFP_ATOMIC;
304 myri_clean_rings(mp);
305 for (i = 0; i < RX_RING_SIZE; i++) {
306 struct sk_buff *skb = myri_alloc_skb(RX_ALLOC_SIZE, gfp_flags);
311 mp->rx_skbs[i] = skb;
313 skb_put(skb, RX_ALLOC_SIZE);
315 dma_addr = dma_map_single(&mp->myri_op->dev,
316 skb->data, RX_ALLOC_SIZE,
318 sbus_writel(dma_addr, &rxd[i].myri_scatters[0].addr);
319 sbus_writel(RX_ALLOC_SIZE, &rxd[i].myri_scatters[0].len);
320 sbus_writel(i, &rxd[i].ctx);
321 sbus_writel(1, &rxd[i].num_sg);
323 sbus_writel(0, &rq->head);
324 sbus_writel(RX_RING_SIZE, &rq->tail);
327 static int myri_init(struct myri_eth *mp, int from_irq)
329 myri_init_rings(mp, from_irq);
333 static void myri_is_not_so_happy(struct myri_eth *mp)
338 static void dump_ehdr(struct ethhdr *ehdr)
340 printk("ehdr[h_dst(%pM)"
343 ehdr->h_dest, ehdr->h_source, ehdr->h_proto);
346 static void dump_ehdr_and_myripad(unsigned char *stuff)
348 struct ethhdr *ehdr = (struct ethhdr *) (stuff + 2);
350 printk("pad[%02x:%02x]", stuff[0], stuff[1]);
355 static void myri_tx(struct myri_eth *mp, struct net_device *dev)
357 struct sendq __iomem *sq= mp->sq;
358 int entry = mp->tx_old;
359 int limit = sbus_readl(&sq->head);
361 DTX(("entry[%d] limit[%d] ", entry, limit));
364 while (entry != limit) {
365 struct sk_buff *skb = mp->tx_skbs[entry];
368 DTX(("SKB[%d] ", entry));
369 dma_addr = sbus_readl(&sq->myri_txd[entry].myri_gathers[0].addr);
370 dma_unmap_single(&mp->myri_op->dev, dma_addr,
371 skb->len, DMA_TO_DEVICE);
373 mp->tx_skbs[entry] = NULL;
374 dev->stats.tx_packets++;
375 entry = NEXT_TX(entry);
380 /* Determine the packet's protocol ID. The rule here is that we
381 * assume 802.3 if the type field is short enough to be a length.
382 * This is normal practice and works for any 'now in use' protocol.
384 static __be16 myri_type_trans(struct sk_buff *skb, struct net_device *dev)
389 skb_set_mac_header(skb, MYRI_PAD_LEN);
390 skb_pull(skb, dev->hard_header_len);
394 DHDR(("myri_type_trans: "));
397 if (*eth->h_dest & 1) {
398 if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN)==0)
399 skb->pkt_type = PACKET_BROADCAST;
401 skb->pkt_type = PACKET_MULTICAST;
402 } else if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
403 if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
404 skb->pkt_type = PACKET_OTHERHOST;
407 if (ntohs(eth->h_proto) >= 1536)
412 /* This is a magic hack to spot IPX packets. Older Novell breaks
413 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
414 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
415 * won't work for fault tolerant netware but does for the rest.
417 if (*(unsigned short *)rawp == 0xFFFF)
418 return htons(ETH_P_802_3);
421 return htons(ETH_P_802_2);
424 static void myri_rx(struct myri_eth *mp, struct net_device *dev)
426 struct recvq __iomem *rq = mp->rq;
427 struct recvq __iomem *rqa = mp->rqack;
428 int entry = sbus_readl(&rqa->head);
429 int limit = sbus_readl(&rqa->tail);
432 DRX(("entry[%d] limit[%d] ", entry, limit));
437 while (entry != limit) {
438 struct myri_rxd __iomem *rxdack = &rqa->myri_rxd[entry];
439 u32 csum = sbus_readl(&rxdack->csum);
440 int len = sbus_readl(&rxdack->myri_scatters[0].len);
441 int index = sbus_readl(&rxdack->ctx);
442 struct myri_rxd __iomem *rxd = &rq->myri_rxd[sbus_readl(&rq->tail)];
443 struct sk_buff *skb = mp->rx_skbs[index];
446 sbus_writel(NEXT_RX(entry), &rqa->head);
448 /* Check for errors. */
449 DRX(("rxd[%d]: %p len[%d] csum[%08x] ", entry, rxd, len, csum));
450 dma_sync_single_for_cpu(&mp->myri_op->dev,
451 sbus_readl(&rxd->myri_scatters[0].addr),
452 RX_ALLOC_SIZE, DMA_FROM_DEVICE);
453 if (len < (ETH_HLEN + MYRI_PAD_LEN) || (skb->data[0] != MYRI_PAD_LEN)) {
455 dev->stats.rx_errors++;
456 if (len < (ETH_HLEN + MYRI_PAD_LEN)) {
457 DRX(("BAD_LENGTH] "));
458 dev->stats.rx_length_errors++;
460 DRX(("NO_PADDING] "));
461 dev->stats.rx_frame_errors++;
464 /* Return it to the LANAI. */
468 dev->stats.rx_dropped++;
469 dma_sync_single_for_device(&mp->myri_op->dev,
470 sbus_readl(&rxd->myri_scatters[0].addr),
473 sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
474 sbus_writel(index, &rxd->ctx);
475 sbus_writel(1, &rxd->num_sg);
476 sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
480 DRX(("len[%d] ", len));
481 if (len > RX_COPY_THRESHOLD) {
482 struct sk_buff *new_skb;
486 new_skb = myri_alloc_skb(RX_ALLOC_SIZE, GFP_ATOMIC);
487 if (new_skb == NULL) {
488 DRX(("skb_alloc(FAILED) "));
491 dma_unmap_single(&mp->myri_op->dev,
492 sbus_readl(&rxd->myri_scatters[0].addr),
495 mp->rx_skbs[index] = new_skb;
497 skb_put(new_skb, RX_ALLOC_SIZE);
498 dma_addr = dma_map_single(&mp->myri_op->dev,
502 sbus_writel(dma_addr, &rxd->myri_scatters[0].addr);
503 sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
504 sbus_writel(index, &rxd->ctx);
505 sbus_writel(1, &rxd->num_sg);
506 sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
508 /* Trim the original skb for the netif. */
509 DRX(("trim(%d) ", len));
512 struct sk_buff *copy_skb = dev_alloc_skb(len);
515 if (copy_skb == NULL) {
516 DRX(("dev_alloc_skb(FAILED) "));
519 /* DMA sync already done above. */
521 DRX(("resv_and_put "));
522 skb_put(copy_skb, len);
523 skb_copy_from_linear_data(skb, copy_skb->data, len);
525 /* Reuse original ring buffer. */
527 dma_sync_single_for_device(&mp->myri_op->dev,
528 sbus_readl(&rxd->myri_scatters[0].addr),
531 sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
532 sbus_writel(index, &rxd->ctx);
533 sbus_writel(1, &rxd->num_sg);
534 sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
539 /* Just like the happy meal we get checksums from this card. */
541 skb->ip_summed = CHECKSUM_UNNECESSARY; /* XXX */
543 skb->protocol = myri_type_trans(skb, dev);
544 DRX(("prot[%04x] netif_rx ", skb->protocol));
547 dev->stats.rx_packets++;
548 dev->stats.rx_bytes += len;
551 entry = NEXT_RX(entry);
555 static irqreturn_t myri_interrupt(int irq, void *dev_id)
557 struct net_device *dev = (struct net_device *) dev_id;
558 struct myri_eth *mp = netdev_priv(dev);
559 void __iomem *lregs = mp->lregs;
560 struct myri_channel __iomem *chan = &mp->shmem->channel;
565 spin_lock_irqsave(&mp->irq_lock, flags);
567 status = sbus_readl(lregs + LANAI_ISTAT);
568 DIRQ(("myri_interrupt: status[%08x] ", status));
569 if (status & ISTAT_HOST) {
573 DIRQ(("IRQ_DISAB "));
574 myri_disable_irq(lregs, mp->cregs);
575 softstate = sbus_readl(&chan->state);
576 DIRQ(("state[%08x] ", softstate));
577 if (softstate != STATE_READY) {
578 DIRQ(("myri_not_so_happy "));
579 myri_is_not_so_happy(mp);
581 DIRQ(("\nmyri_rx: "));
583 DIRQ(("\nistat=ISTAT_HOST "));
584 sbus_writel(ISTAT_HOST, lregs + LANAI_ISTAT);
586 myri_enable_irq(lregs, mp->cregs);
590 spin_unlock_irqrestore(&mp->irq_lock, flags);
592 return IRQ_RETVAL(handled);
595 static int myri_open(struct net_device *dev)
597 struct myri_eth *mp = netdev_priv(dev);
599 return myri_init(mp, in_interrupt());
602 static int myri_close(struct net_device *dev)
604 struct myri_eth *mp = netdev_priv(dev);
606 myri_clean_rings(mp);
610 static void myri_tx_timeout(struct net_device *dev)
612 struct myri_eth *mp = netdev_priv(dev);
614 printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
616 dev->stats.tx_errors++;
618 netif_wake_queue(dev);
621 static int myri_start_xmit(struct sk_buff *skb, struct net_device *dev)
623 struct myri_eth *mp = netdev_priv(dev);
624 struct sendq __iomem *sq = mp->sq;
625 struct myri_txd __iomem *txd;
627 unsigned int head, tail;
631 DTX(("myri_start_xmit: "));
635 netif_stop_queue(dev);
637 /* This is just to prevent multiple PIO reads for TX_BUFFS_AVAIL. */
638 head = sbus_readl(&sq->head);
639 tail = sbus_readl(&sq->tail);
641 if (!TX_BUFFS_AVAIL(head, tail)) {
642 DTX(("no buffs available, returning 1\n"));
643 return NETDEV_TX_BUSY;
646 spin_lock_irqsave(&mp->irq_lock, flags);
648 DHDR(("xmit[skbdata(%p)]\n", skb->data));
650 dump_ehdr_and_myripad(((unsigned char *) skb->data));
653 /* XXX Maybe this can go as well. */
657 len = (len + 4) & (~3);
660 entry = sbus_readl(&sq->tail);
662 txd = &sq->myri_txd[entry];
663 mp->tx_skbs[entry] = skb;
665 /* Must do this before we sbus map it. */
666 if (skb->data[MYRI_PAD_LEN] & 0x1) {
667 sbus_writew(0xffff, &txd->addr[0]);
668 sbus_writew(0xffff, &txd->addr[1]);
669 sbus_writew(0xffff, &txd->addr[2]);
670 sbus_writew(0xffff, &txd->addr[3]);
672 sbus_writew(0xffff, &txd->addr[0]);
673 sbus_writew((skb->data[0] << 8) | skb->data[1], &txd->addr[1]);
674 sbus_writew((skb->data[2] << 8) | skb->data[3], &txd->addr[2]);
675 sbus_writew((skb->data[4] << 8) | skb->data[5], &txd->addr[3]);
678 dma_addr = dma_map_single(&mp->myri_op->dev, skb->data,
680 sbus_writel(dma_addr, &txd->myri_gathers[0].addr);
681 sbus_writel(len, &txd->myri_gathers[0].len);
682 sbus_writel(1, &txd->num_sg);
683 sbus_writel(KERNEL_CHANNEL, &txd->chan);
684 sbus_writel(len, &txd->len);
685 sbus_writel((u32)-1, &txd->csum_off);
686 sbus_writel(0, &txd->csum_field);
688 sbus_writel(NEXT_TX(entry), &sq->tail);
689 DTX(("BangTheChip "));
692 DTX(("tbusy=0, returning 0\n"));
693 netif_start_queue(dev);
694 spin_unlock_irqrestore(&mp->irq_lock, flags);
698 /* Create the MyriNet MAC header for an arbitrary protocol layer
700 * saddr=NULL means use device source address
701 * daddr=NULL means leave destination address (eg unresolved arp)
703 static int myri_header(struct sk_buff *skb, struct net_device *dev,
704 unsigned short type, const void *daddr,
705 const void *saddr, unsigned len)
707 struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
708 unsigned char *pad = (unsigned char *) skb_push(skb, MYRI_PAD_LEN);
711 DHDR(("myri_header: pad[%02x,%02x] ", pad[0], pad[1]));
715 /* Set the MyriNET padding identifier. */
716 pad[0] = MYRI_PAD_LEN;
719 /* Set the protocol type. For a packet of type ETH_P_802_3/2 we put the
720 * length in here instead.
722 if (type != ETH_P_802_3 && type != ETH_P_802_2)
723 eth->h_proto = htons(type);
725 eth->h_proto = htons(len);
727 /* Set the source hardware address. */
729 memcpy(eth->h_source, saddr, dev->addr_len);
731 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
733 /* Anyway, the loopback-device should never use this function... */
734 if (dev->flags & IFF_LOOPBACK) {
736 for (i = 0; i < dev->addr_len; i++)
738 return(dev->hard_header_len);
742 memcpy(eth->h_dest, daddr, dev->addr_len);
743 return dev->hard_header_len;
745 return -dev->hard_header_len;
748 /* Rebuild the MyriNet MAC header. This is called after an ARP
749 * (or in future other address resolution) has completed on this
750 * sk_buff. We now let ARP fill in the other fields.
752 static int myri_rebuild_header(struct sk_buff *skb)
754 unsigned char *pad = (unsigned char *) skb->data;
755 struct ethhdr *eth = (struct ethhdr *) (pad + MYRI_PAD_LEN);
756 struct net_device *dev = skb->dev;
759 DHDR(("myri_rebuild_header: pad[%02x,%02x] ", pad[0], pad[1]));
763 /* Refill MyriNet padding identifiers, this is just being anal. */
764 pad[0] = MYRI_PAD_LEN;
767 switch (eth->h_proto)
770 case cpu_to_be16(ETH_P_IP):
771 return arp_find(eth->h_dest, skb);
776 "%s: unable to resolve type %X addresses.\n",
777 dev->name, (int)eth->h_proto);
779 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
787 static int myri_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
789 unsigned short type = hh->hh_type;
792 const struct net_device *dev = neigh->dev;
794 pad = ((unsigned char *) hh->hh_data) +
795 HH_DATA_OFF(sizeof(*eth) + MYRI_PAD_LEN);
796 eth = (struct ethhdr *) (pad + MYRI_PAD_LEN);
798 if (type == htons(ETH_P_802_3))
801 /* Refill MyriNet padding identifiers, this is just being anal. */
802 pad[0] = MYRI_PAD_LEN;
806 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
807 memcpy(eth->h_dest, neigh->ha, dev->addr_len);
813 /* Called by Address Resolution module to notify changes in address. */
814 void myri_header_cache_update(struct hh_cache *hh,
815 const struct net_device *dev,
816 const unsigned char * haddr)
818 memcpy(((u8*)hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)),
819 haddr, dev->addr_len);
822 static int myri_change_mtu(struct net_device *dev, int new_mtu)
824 if ((new_mtu < (ETH_HLEN + MYRI_PAD_LEN)) || (new_mtu > MYRINET_MTU))
830 static void myri_set_multicast(struct net_device *dev)
832 /* Do nothing, all MyriCOM nodes transmit multicast frames
833 * as broadcast packets...
837 static inline void set_boardid_from_idprom(struct myri_eth *mp, int num)
839 mp->eeprom.id[0] = 0;
840 mp->eeprom.id[1] = idprom->id_machtype;
841 mp->eeprom.id[2] = (idprom->id_sernum >> 16) & 0xff;
842 mp->eeprom.id[3] = (idprom->id_sernum >> 8) & 0xff;
843 mp->eeprom.id[4] = (idprom->id_sernum >> 0) & 0xff;
844 mp->eeprom.id[5] = num;
847 static inline void determine_reg_space_size(struct myri_eth *mp)
849 switch(mp->eeprom.cpuvers) {
854 mp->reg_size = (3 * 128 * 1024) + 4096;
859 mp->reg_size = ((4096<<1) + mp->eeprom.ramsz);
865 printk("myricom: AIEEE weird cpu version %04x assuming pre4.0\n",
867 mp->reg_size = (3 * 128 * 1024) + 4096;
872 static void dump_eeprom(struct myri_eth *mp)
874 printk("EEPROM: clockval[%08x] cpuvers[%04x] "
875 "id[%02x,%02x,%02x,%02x,%02x,%02x]\n",
876 mp->eeprom.cval, mp->eeprom.cpuvers,
877 mp->eeprom.id[0], mp->eeprom.id[1], mp->eeprom.id[2],
878 mp->eeprom.id[3], mp->eeprom.id[4], mp->eeprom.id[5]);
879 printk("EEPROM: ramsz[%08x]\n", mp->eeprom.ramsz);
880 printk("EEPROM: fvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
881 mp->eeprom.fvers[0], mp->eeprom.fvers[1], mp->eeprom.fvers[2],
882 mp->eeprom.fvers[3], mp->eeprom.fvers[4], mp->eeprom.fvers[5],
883 mp->eeprom.fvers[6], mp->eeprom.fvers[7]);
884 printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
885 mp->eeprom.fvers[8], mp->eeprom.fvers[9], mp->eeprom.fvers[10],
886 mp->eeprom.fvers[11], mp->eeprom.fvers[12], mp->eeprom.fvers[13],
887 mp->eeprom.fvers[14], mp->eeprom.fvers[15]);
888 printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
889 mp->eeprom.fvers[16], mp->eeprom.fvers[17], mp->eeprom.fvers[18],
890 mp->eeprom.fvers[19], mp->eeprom.fvers[20], mp->eeprom.fvers[21],
891 mp->eeprom.fvers[22], mp->eeprom.fvers[23]);
892 printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n",
893 mp->eeprom.fvers[24], mp->eeprom.fvers[25], mp->eeprom.fvers[26],
894 mp->eeprom.fvers[27], mp->eeprom.fvers[28], mp->eeprom.fvers[29],
895 mp->eeprom.fvers[30], mp->eeprom.fvers[31]);
896 printk("EEPROM: mvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
897 mp->eeprom.mvers[0], mp->eeprom.mvers[1], mp->eeprom.mvers[2],
898 mp->eeprom.mvers[3], mp->eeprom.mvers[4], mp->eeprom.mvers[5],
899 mp->eeprom.mvers[6], mp->eeprom.mvers[7]);
900 printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n",
901 mp->eeprom.mvers[8], mp->eeprom.mvers[9], mp->eeprom.mvers[10],
902 mp->eeprom.mvers[11], mp->eeprom.mvers[12], mp->eeprom.mvers[13],
903 mp->eeprom.mvers[14], mp->eeprom.mvers[15]);
904 printk("EEPROM: dlval[%04x] brd_type[%04x] bus_type[%04x] prod_code[%04x]\n",
905 mp->eeprom.dlval, mp->eeprom.brd_type, mp->eeprom.bus_type,
906 mp->eeprom.prod_code);
907 printk("EEPROM: serial_num[%08x]\n", mp->eeprom.serial_num);
911 static const struct header_ops myri_header_ops = {
912 .create = myri_header,
913 .rebuild = myri_rebuild_header,
914 .cache = myri_header_cache,
915 .cache_update = myri_header_cache_update,
918 static const struct net_device_ops myri_ops = {
919 .ndo_open = myri_open,
920 .ndo_stop = myri_close,
921 .ndo_start_xmit = myri_start_xmit,
922 .ndo_set_multicast_list = myri_set_multicast,
923 .ndo_tx_timeout = myri_tx_timeout,
924 .ndo_change_mtu = myri_change_mtu,
925 .ndo_set_mac_address = eth_mac_addr,
926 .ndo_validate_addr = eth_validate_addr,
929 static int __devinit myri_sbus_probe(struct of_device *op, const struct of_device_id *match)
931 struct device_node *dp = op->dev.of_node;
932 static unsigned version_printed;
933 struct net_device *dev;
939 DET(("myri_ether_init(%p,%d):\n", op, num));
940 dev = alloc_etherdev(sizeof(struct myri_eth));
944 if (version_printed++ == 0)
947 SET_NETDEV_DEV(dev, &op->dev);
949 mp = netdev_priv(dev);
950 spin_lock_init(&mp->irq_lock);
953 /* Clean out skb arrays. */
954 for (i = 0; i < (RX_RING_SIZE + 1); i++)
955 mp->rx_skbs[i] = NULL;
957 for (i = 0; i < TX_RING_SIZE; i++)
958 mp->tx_skbs[i] = NULL;
960 /* First check for EEPROM information. */
961 prop = of_get_property(dp, "myrinet-eeprom-info", &len);
964 memcpy(&mp->eeprom, prop, sizeof(struct myri_eeprom));
966 /* No eeprom property, must cook up the values ourselves. */
967 DET(("No EEPROM: "));
968 mp->eeprom.bus_type = BUS_TYPE_SBUS;
970 of_getintprop_default(dp, "cpu_version", 0);
972 of_getintprop_default(dp, "clock_value", 0);
973 mp->eeprom.ramsz = of_getintprop_default(dp, "sram_size", 0);
974 if (!mp->eeprom.cpuvers)
975 mp->eeprom.cpuvers = CPUVERS_2_3;
976 if (mp->eeprom.cpuvers < CPUVERS_3_0)
978 if (!mp->eeprom.ramsz)
979 mp->eeprom.ramsz = (128 * 1024);
981 prop = of_get_property(dp, "myrinet-board-id", &len);
983 memcpy(&mp->eeprom.id[0], prop, 6);
985 set_boardid_from_idprom(mp, num);
987 prop = of_get_property(dp, "fpga_version", &len);
989 memcpy(&mp->eeprom.fvers[0], prop, 32);
991 memset(&mp->eeprom.fvers[0], 0, 32);
993 if (mp->eeprom.cpuvers == CPUVERS_4_1) {
994 if (mp->eeprom.ramsz == (128 * 1024))
995 mp->eeprom.ramsz = (256 * 1024);
996 if ((mp->eeprom.cval == 0x40414041) ||
997 (mp->eeprom.cval == 0x90449044))
998 mp->eeprom.cval = 0x50e450e4;
1005 for (i = 0; i < 6; i++)
1006 dev->dev_addr[i] = mp->eeprom.id[i];
1008 determine_reg_space_size(mp);
1010 /* Map in the MyriCOM register/localram set. */
1011 if (mp->eeprom.cpuvers < CPUVERS_4_0) {
1012 /* XXX Makes no sense, if control reg is non-existant this
1013 * XXX driver cannot function at all... maybe pre-4.0 is
1014 * XXX only a valid version for PCI cards? Ask feldy...
1016 DET(("Mapping regs for cpuvers < CPUVERS_4_0\n"));
1017 mp->regs = of_ioremap(&op->resource[0], 0,
1018 mp->reg_size, "MyriCOM Regs");
1020 printk("MyriCOM: Cannot map MyriCOM registers.\n");
1023 mp->lanai = mp->regs + (256 * 1024);
1024 mp->lregs = mp->lanai + (0x10000 * 2);
1026 DET(("Mapping regs for cpuvers >= CPUVERS_4_0\n"));
1027 mp->cregs = of_ioremap(&op->resource[0], 0,
1028 PAGE_SIZE, "MyriCOM Control Regs");
1029 mp->lregs = of_ioremap(&op->resource[0], (256 * 1024),
1030 PAGE_SIZE, "MyriCOM LANAI Regs");
1031 mp->lanai = of_ioremap(&op->resource[0], (512 * 1024),
1032 mp->eeprom.ramsz, "MyriCOM SRAM");
1034 DET(("Registers mapped: cregs[%p] lregs[%p] lanai[%p]\n",
1035 mp->cregs, mp->lregs, mp->lanai));
1037 if (mp->eeprom.cpuvers >= CPUVERS_4_0)
1038 mp->shmem_base = 0xf000;
1040 mp->shmem_base = 0x8000;
1042 DET(("Shared memory base is %04x, ", mp->shmem_base));
1044 mp->shmem = (struct myri_shmem __iomem *)
1045 (mp->lanai + (mp->shmem_base * 2));
1046 DET(("shmem mapped at %p\n", mp->shmem));
1048 mp->rqack = &mp->shmem->channel.recvqa;
1049 mp->rq = &mp->shmem->channel.recvq;
1050 mp->sq = &mp->shmem->channel.sendq;
1052 /* Reset the board. */
1053 DET(("Resetting LANAI\n"));
1054 myri_reset_off(mp->lregs, mp->cregs);
1055 myri_reset_on(mp->cregs);
1057 /* Turn IRQ's off. */
1058 myri_disable_irq(mp->lregs, mp->cregs);
1060 /* Reset once more. */
1061 myri_reset_on(mp->cregs);
1063 /* Get the supported DVMA burst sizes from our SBUS. */
1064 mp->myri_bursts = of_getintprop_default(dp->parent,
1065 "burst-sizes", 0x00);
1066 if (!sbus_can_burst64())
1067 mp->myri_bursts &= ~(DMA_BURST64);
1069 DET(("MYRI bursts %02x\n", mp->myri_bursts));
1071 /* Encode SBUS interrupt level in second control register. */
1072 i = of_getintprop_default(dp, "interrupts", 0);
1075 DET(("prom_getint(interrupts)==%d, irqlvl set to %04x\n",
1078 sbus_writel((1 << i), mp->cregs + MYRICTRL_IRQLVL);
1081 dev->watchdog_timeo = 5*HZ;
1082 dev->irq = op->archdata.irqs[0];
1083 dev->netdev_ops = &myri_ops;
1085 /* Register interrupt handler now. */
1086 DET(("Requesting MYRIcom IRQ line.\n"));
1087 if (request_irq(dev->irq, myri_interrupt,
1088 IRQF_SHARED, "MyriCOM Ethernet", (void *) dev)) {
1089 printk("MyriCOM: Cannot register interrupt handler.\n");
1093 dev->mtu = MYRINET_MTU;
1094 dev->header_ops = &myri_header_ops;
1096 dev->hard_header_len = (ETH_HLEN + MYRI_PAD_LEN);
1098 /* Load code onto the LANai. */
1099 DET(("Loading LANAI firmware\n"));
1100 if (myri_load_lanai(mp)) {
1101 printk(KERN_ERR "MyriCOM: Cannot Load LANAI firmware.\n");
1105 if (register_netdev(dev)) {
1106 printk("MyriCOM: Cannot register device.\n");
1110 dev_set_drvdata(&op->dev, mp);
1114 printk("%s: MyriCOM MyriNET Ethernet %pM\n",
1115 dev->name, dev->dev_addr);
1120 free_irq(dev->irq, dev);
1122 /* This will also free the co-allocated private data*/
1127 static int __devexit myri_sbus_remove(struct of_device *op)
1129 struct myri_eth *mp = dev_get_drvdata(&op->dev);
1130 struct net_device *net_dev = mp->dev;
1132 unregister_netdev(net_dev);
1134 free_irq(net_dev->irq, net_dev);
1136 if (mp->eeprom.cpuvers < CPUVERS_4_0) {
1137 of_iounmap(&op->resource[0], mp->regs, mp->reg_size);
1139 of_iounmap(&op->resource[0], mp->cregs, PAGE_SIZE);
1140 of_iounmap(&op->resource[0], mp->lregs, (256 * 1024));
1141 of_iounmap(&op->resource[0], mp->lanai, (512 * 1024));
1144 free_netdev(net_dev);
1146 dev_set_drvdata(&op->dev, NULL);
1151 static const struct of_device_id myri_sbus_match[] = {
1153 .name = "MYRICOM,mlanai",
1161 MODULE_DEVICE_TABLE(of, myri_sbus_match);
1163 static struct of_platform_driver myri_sbus_driver = {
1166 .owner = THIS_MODULE,
1167 .of_match_table = myri_sbus_match,
1169 .probe = myri_sbus_probe,
1170 .remove = __devexit_p(myri_sbus_remove),
1173 static int __init myri_sbus_init(void)
1175 return of_register_platform_driver(&myri_sbus_driver);
1178 static void __exit myri_sbus_exit(void)
1180 of_unregister_platform_driver(&myri_sbus_driver);
1183 module_init(myri_sbus_init);
1184 module_exit(myri_sbus_exit);
1186 MODULE_LICENSE("GPL");
1187 MODULE_FIRMWARE(FWNAME);