diff options
Diffstat (limited to 'drivers/net/myri_sbus.c')
| -rw-r--r-- | drivers/net/myri_sbus.c | 1174 |
1 files changed, 1174 insertions, 0 deletions
diff --git a/drivers/net/myri_sbus.c b/drivers/net/myri_sbus.c new file mode 100644 index 000000000000..aad5494c83cf --- /dev/null +++ b/drivers/net/myri_sbus.c @@ -0,0 +1,1174 @@ +/* myri_sbus.h: MyriCOM MyriNET SBUS card driver. + * + * Copyright (C) 1996, 1999 David S. Miller (davem@redhat.com) + */ + +static char version[] = + "myri_sbus.c:v1.9 12/Sep/99 David S. Miller (davem@redhat.com)\n"; + +#include <linux/module.h> +#include <linux/config.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/bitops.h> + +#include <net/dst.h> +#include <net/arp.h> +#include <net/sock.h> +#include <net/ipv6.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/byteorder.h> +#include <asm/idprom.h> +#include <asm/sbus.h> +#include <asm/openprom.h> +#include <asm/oplib.h> +#include <asm/auxio.h> +#include <asm/pgtable.h> +#include <asm/irq.h> +#include <asm/checksum.h> + +#include "myri_sbus.h" +#include "myri_code.h" + +/* #define DEBUG_DETECT */ +/* #define DEBUG_IRQ */ +/* #define DEBUG_TRANSMIT */ +/* #define DEBUG_RECEIVE */ +/* #define DEBUG_HEADER */ + +#ifdef DEBUG_DETECT +#define DET(x) printk x +#else +#define DET(x) +#endif + +#ifdef DEBUG_IRQ +#define DIRQ(x) printk x +#else +#define DIRQ(x) +#endif + +#ifdef DEBUG_TRANSMIT +#define DTX(x) printk x +#else +#define DTX(x) +#endif + +#ifdef DEBUG_RECEIVE +#define DRX(x) printk x +#else +#define DRX(x) +#endif + +#ifdef DEBUG_HEADER +#define DHDR(x) printk x +#else +#define DHDR(x) +#endif + +#ifdef MODULE +static struct myri_eth *root_myri_dev; +#endif + +static void myri_reset_off(void __iomem *lp, void __iomem *cregs) +{ + /* Clear IRQ mask. */ + sbus_writel(0, lp + LANAI_EIMASK); + + /* Turn RESET function off. */ + sbus_writel(CONTROL_ROFF, cregs + MYRICTRL_CTRL); +} + +static void myri_reset_on(void __iomem *cregs) +{ + /* Enable RESET function. */ + sbus_writel(CONTROL_RON, cregs + MYRICTRL_CTRL); + + /* Disable IRQ's. */ + sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL); +} + +static void myri_disable_irq(void __iomem *lp, void __iomem *cregs) +{ + sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL); + sbus_writel(0, lp + LANAI_EIMASK); + sbus_writel(ISTAT_HOST, lp + LANAI_ISTAT); +} + +static void myri_enable_irq(void __iomem *lp, void __iomem *cregs) +{ + sbus_writel(CONTROL_EIRQ, cregs + MYRICTRL_CTRL); + sbus_writel(ISTAT_HOST, lp + LANAI_EIMASK); +} + +static inline void bang_the_chip(struct myri_eth *mp) +{ + struct myri_shmem __iomem *shmem = mp->shmem; + void __iomem *cregs = mp->cregs; + + sbus_writel(1, &shmem->send); + sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL); +} + +static int myri_do_handshake(struct myri_eth *mp) +{ + struct myri_shmem __iomem *shmem = mp->shmem; + void __iomem *cregs = mp->cregs; + struct myri_channel __iomem *chan = &shmem->channel; + int tick = 0; + + DET(("myri_do_handshake: ")); + if (sbus_readl(&chan->state) == STATE_READY) { + DET(("Already STATE_READY, failed.\n")); + return -1; /* We're hosed... */ + } + + myri_disable_irq(mp->lregs, cregs); + + while (tick++ <= 25) { + u32 softstate; + + /* Wake it up. */ + DET(("shakedown, CONTROL_WON, ")); + sbus_writel(1, &shmem->shakedown); + sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL); + + softstate = sbus_readl(&chan->state); + DET(("chanstate[%08x] ", softstate)); + if (softstate == STATE_READY) { + DET(("wakeup successful, ")); + break; + } + + if (softstate != STATE_WFN) { + DET(("not WFN setting that, ")); + sbus_writel(STATE_WFN, &chan->state); + } + + udelay(20); + } + + myri_enable_irq(mp->lregs, cregs); + + if (tick > 25) { + DET(("25 ticks we lose, failure.\n")); + return -1; + } + DET(("success\n")); + return 0; +} + +static int myri_load_lanai(struct myri_eth *mp) +{ + struct net_device *dev = mp->dev; + struct myri_shmem __iomem *shmem = mp->shmem; + void __iomem *rptr; + int i; + + myri_disable_irq(mp->lregs, mp->cregs); + myri_reset_on(mp->cregs); + + rptr = mp->lanai; + for (i = 0; i < mp->eeprom.ramsz; i++) + sbus_writeb(0, rptr + i); + + if (mp->eeprom.cpuvers >= CPUVERS_3_0) + sbus_writel(mp->eeprom.cval, mp->lregs + LANAI_CVAL); + + /* Load executable code. */ + for (i = 0; i < sizeof(lanai4_code); i++) + sbus_writeb(lanai4_code[i], rptr + (lanai4_code_off * 2) + i); + + /* Load data segment. */ + for (i = 0; i < sizeof(lanai4_data); i++) + sbus_writeb(lanai4_data[i], rptr + (lanai4_data_off * 2) + i); + + /* Set device address. */ + sbus_writeb(0, &shmem->addr[0]); + sbus_writeb(0, &shmem->addr[1]); + for (i = 0; i < 6; i++) + sbus_writeb(dev->dev_addr[i], + &shmem->addr[i + 2]); + + /* Set SBUS bursts and interrupt mask. */ + sbus_writel(((mp->myri_bursts & 0xf8) >> 3), &shmem->burst); + sbus_writel(SHMEM_IMASK_RX, &shmem->imask); + + /* Release the LANAI. */ + myri_disable_irq(mp->lregs, mp->cregs); + myri_reset_off(mp->lregs, mp->cregs); + myri_disable_irq(mp->lregs, mp->cregs); + + /* Wait for the reset to complete. */ + for (i = 0; i < 5000; i++) { + if (sbus_readl(&shmem->channel.state) != STATE_READY) + break; + else + udelay(10); + } + + if (i == 5000) + printk(KERN_ERR "myricom: Chip would not reset after firmware load.\n"); + + i = myri_do_handshake(mp); + if (i) + printk(KERN_ERR "myricom: Handshake with LANAI failed.\n"); + + if (mp->eeprom.cpuvers == CPUVERS_4_0) + sbus_writel(0, mp->lregs + LANAI_VERS); + + return i; +} + +static void myri_clean_rings(struct myri_eth *mp) +{ + struct sendq __iomem *sq = mp->sq; + struct recvq __iomem *rq = mp->rq; + int i; + + sbus_writel(0, &rq->tail); + sbus_writel(0, &rq->head); + for (i = 0; i < (RX_RING_SIZE+1); i++) { + if (mp->rx_skbs[i] != NULL) { + struct myri_rxd __iomem *rxd = &rq->myri_rxd[i]; + u32 dma_addr; + + dma_addr = sbus_readl(&rxd->myri_scatters[0].addr); + sbus_unmap_single(mp->myri_sdev, dma_addr, RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE); + dev_kfree_skb(mp->rx_skbs[i]); + mp->rx_skbs[i] = NULL; + } + } + + mp->tx_old = 0; + sbus_writel(0, &sq->tail); + sbus_writel(0, &sq->head); + for (i = 0; i < TX_RING_SIZE; i++) { + if (mp->tx_skbs[i] != NULL) { + struct sk_buff *skb = mp->tx_skbs[i]; + struct myri_txd __iomem *txd = &sq->myri_txd[i]; + u32 dma_addr; + + dma_addr = sbus_readl(&txd->myri_gathers[0].addr); + sbus_unmap_single(mp->myri_sdev, dma_addr, (skb->len + 3) & ~3, SBUS_DMA_TODEVICE); + dev_kfree_skb(mp->tx_skbs[i]); + mp->tx_skbs[i] = NULL; + } + } +} + +static void myri_init_rings(struct myri_eth *mp, int from_irq) +{ + struct recvq __iomem *rq = mp->rq; + struct myri_rxd __iomem *rxd = &rq->myri_rxd[0]; + struct net_device *dev = mp->dev; + int gfp_flags = GFP_KERNEL; + int i; + + if (from_irq || in_interrupt()) + gfp_flags = GFP_ATOMIC; + + myri_clean_rings(mp); + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb = myri_alloc_skb(RX_ALLOC_SIZE, gfp_flags); + u32 dma_addr; + + if (!skb) + continue; + mp->rx_skbs[i] = skb; + skb->dev = dev; + skb_put(skb, RX_ALLOC_SIZE); + + dma_addr = sbus_map_single(mp->myri_sdev, skb->data, RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE); + sbus_writel(dma_addr, &rxd[i].myri_scatters[0].addr); + sbus_writel(RX_ALLOC_SIZE, &rxd[i].myri_scatters[0].len); + sbus_writel(i, &rxd[i].ctx); + sbus_writel(1, &rxd[i].num_sg); + } + sbus_writel(0, &rq->head); + sbus_writel(RX_RING_SIZE, &rq->tail); +} + +static int myri_init(struct myri_eth *mp, int from_irq) +{ + myri_init_rings(mp, from_irq); + return 0; +} + +static void myri_is_not_so_happy(struct myri_eth *mp) +{ +} + +#ifdef DEBUG_HEADER +static void dump_ehdr(struct ethhdr *ehdr) +{ + printk("ehdr[h_dst(%02x:%02x:%02x:%02x:%02x:%02x)" + "h_source(%02x:%02x:%02x:%02x:%02x:%02x)h_proto(%04x)]\n", + ehdr->h_dest[0], ehdr->h_dest[1], ehdr->h_dest[2], + ehdr->h_dest[3], ehdr->h_dest[4], ehdr->h_dest[4], + ehdr->h_source[0], ehdr->h_source[1], ehdr->h_source[2], + ehdr->h_source[3], ehdr->h_source[4], ehdr->h_source[4], + ehdr->h_proto); +} + +static void dump_ehdr_and_myripad(unsigned char *stuff) +{ + struct ethhdr *ehdr = (struct ethhdr *) (stuff + 2); + + printk("pad[%02x:%02x]", stuff[0], stuff[1]); + printk("ehdr[h_dst(%02x:%02x:%02x:%02x:%02x:%02x)" + "h_source(%02x:%02x:%02x:%02x:%02x:%02x)h_proto(%04x)]\n", + ehdr->h_dest[0], ehdr->h_dest[1], ehdr->h_dest[2], + ehdr->h_dest[3], ehdr->h_dest[4], ehdr->h_dest[4], + ehdr->h_source[0], ehdr->h_source[1], ehdr->h_source[2], + ehdr->h_source[3], ehdr->h_source[4], ehdr->h_source[4], + ehdr->h_proto); +} +#endif + +static void myri_tx(struct myri_eth *mp, struct net_device *dev) +{ + struct sendq __iomem *sq= mp->sq; + int entry = mp->tx_old; + int limit = sbus_readl(&sq->head); + + DTX(("entry[%d] limit[%d] ", entry, limit)); + if (entry == limit) + return; + while (entry != limit) { + struct sk_buff *skb = mp->tx_skbs[entry]; + u32 dma_addr; + + DTX(("SKB[%d] ", entry)); + dma_addr = sbus_readl(&sq->myri_txd[entry].myri_gathers[0].addr); + sbus_unmap_single(mp->myri_sdev, dma_addr, skb->len, SBUS_DMA_TODEVICE); + dev_kfree_skb(skb); + mp->tx_skbs[entry] = NULL; + mp->enet_stats.tx_packets++; + entry = NEXT_TX(entry); + } + mp->tx_old = entry; +} + +/* Determine the packet's protocol ID. The rule here is that we + * assume 802.3 if the type field is short enough to be a length. + * This is normal practice and works for any 'now in use' protocol. + */ +static unsigned short myri_type_trans(struct sk_buff *skb, struct net_device *dev) +{ + struct ethhdr *eth; + unsigned char *rawp; + + skb->mac.raw = (((unsigned char *)skb->data) + MYRI_PAD_LEN); + skb_pull(skb, dev->hard_header_len); + eth = eth_hdr(skb); + +#ifdef DEBUG_HEADER + DHDR(("myri_type_trans: ")); + dump_ehdr(eth); +#endif + if (*eth->h_dest & 1) { + if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN)==0) + skb->pkt_type = PACKET_BROADCAST; + else + skb->pkt_type = PACKET_MULTICAST; + } else if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) { + if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN)) + skb->pkt_type = PACKET_OTHERHOST; + } + + if (ntohs(eth->h_proto) >= 1536) + return eth->h_proto; + + rawp = skb->data; + + /* This is a magic hack to spot IPX packets. Older Novell breaks + * the protocol design and runs IPX over 802.3 without an 802.2 LLC + * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This + * won't work for fault tolerant netware but does for the rest. + */ + if (*(unsigned short *)rawp == 0xFFFF) + return htons(ETH_P_802_3); + + /* Real 802.2 LLC */ + return htons(ETH_P_802_2); +} + +static void myri_rx(struct myri_eth *mp, struct net_device *dev) +{ + struct recvq __iomem *rq = mp->rq; + struct recvq __iomem *rqa = mp->rqack; + int entry = sbus_readl(&rqa->head); + int limit = sbus_readl(&rqa->tail); + int drops; + + DRX(("entry[%d] limit[%d] ", entry, limit)); + if (entry == limit) + return; + drops = 0; + DRX(("\n")); + while (entry != limit) { + struct myri_rxd __iomem *rxdack = &rqa->myri_rxd[entry]; + u32 csum = sbus_readl(&rxdack->csum); + int len = sbus_readl(&rxdack->myri_scatters[0].len); + int index = sbus_readl(&rxdack->ctx); + struct myri_rxd __iomem *rxd = &rq->myri_rxd[sbus_readl(&rq->tail)]; + struct sk_buff *skb = mp->rx_skbs[index]; + + /* Ack it. */ + sbus_writel(NEXT_RX(entry), &rqa->head); + + /* Check for errors. */ + DRX(("rxd[%d]: %p len[%d] csum[%08x] ", entry, rxd, len, csum)); + sbus_dma_sync_single_for_cpu(mp->myri_sdev, + sbus_readl(&rxd->myri_scatters[0].addr), + RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE); + if (len < (ETH_HLEN + MYRI_PAD_LEN) || (skb->data[0] != MYRI_PAD_LEN)) { + DRX(("ERROR[")); + mp->enet_stats.rx_errors++; + if (len < (ETH_HLEN + MYRI_PAD_LEN)) { + DRX(("BAD_LENGTH] ")); + mp->enet_stats.rx_length_errors++; + } else { + DRX(("NO_PADDING] ")); + mp->enet_stats.rx_frame_errors++; + } + + /* Return it to the LANAI. */ + drop_it: + drops++; + DRX(("DROP ")); + mp->enet_stats.rx_dropped++; + sbus_dma_sync_single_for_device(mp->myri_sdev, + sbus_readl(&rxd->myri_scatters[0].addr), + RX_ALLOC_SIZE, + SBUS_DMA_FROMDEVICE); + sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len); + sbus_writel(index, &rxd->ctx); + sbus_writel(1, &rxd->num_sg); + sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail); + goto next; + } + + DRX(("len[%d] ", len)); + if (len > RX_COPY_THRESHOLD) { + struct sk_buff *new_skb; + u32 dma_addr; + + DRX(("BIGBUFF ")); + new_skb = myri_alloc_skb(RX_ALLOC_SIZE, GFP_ATOMIC); + if (new_skb == NULL) { + DRX(("skb_alloc(FAILED) ")); + goto drop_it; + } + sbus_unmap_single(mp->myri_sdev, + sbus_readl(&rxd->myri_scatters[0].addr), + RX_ALLOC_SIZE, + SBUS_DMA_FROMDEVICE); + mp->rx_skbs[index] = new_skb; + new_skb->dev = dev; + skb_put(new_skb, RX_ALLOC_SIZE); + dma_addr = sbus_map_single(mp->myri_sdev, + new_skb->data, + RX_ALLOC_SIZE, + SBUS_DMA_FROMDEVICE); + sbus_writel(dma_addr, &rxd->myri_scatters[0].addr); + sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len); + sbus_writel(index, &rxd->ctx); + sbus_writel(1, &rxd->num_sg); + sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail); + + /* Trim the original skb for the netif. */ + DRX(("trim(%d) ", len)); + skb_trim(skb, len); + } else { + struct sk_buff *copy_skb = dev_alloc_skb(len); + + DRX(("SMALLBUFF ")); + if (copy_skb == NULL) { + DRX(("dev_alloc_skb(FAILED) ")); + goto drop_it; + } + /* DMA sync already done above. */ + copy_skb->dev = dev; + DRX(("resv_and_put ")); + skb_put(copy_skb, len); + memcpy(copy_skb->data, skb->data, len); + + /* Reuse original ring buffer. */ + DRX(("reuse ")); + sbus_dma_sync_single_for_device(mp->myri_sdev, + sbus_readl(&rxd->myri_scatters[0].addr), + RX_ALLOC_SIZE, + SBUS_DMA_FROMDEVICE); + sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len); + sbus_writel(index, &rxd->ctx); + sbus_writel(1, &rxd->num_sg); + sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail); + + skb = copy_skb; + } + + /* Just like the happy meal we get checksums from this card. */ + skb->csum = csum; + skb->ip_summed = CHECKSUM_UNNECESSARY; /* XXX */ + + skb->protocol = myri_type_trans(skb, dev); + DRX(("prot[%04x] netif_rx ", skb->protocol)); + netif_rx(skb); + + dev->last_rx = jiffies; + mp->enet_stats.rx_packets++; + mp->enet_stats.rx_bytes += len; + next: + DRX(("NEXT\n")); + entry = NEXT_RX(entry); + } +} + +static irqreturn_t myri_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = (struct net_device *) dev_id; + struct myri_eth *mp = (struct myri_eth *) dev->priv; + void __iomem *lregs = mp->lregs; + struct myri_channel __iomem *chan = &mp->shmem->channel; + unsigned long flags; + u32 status; + int handled = 0; + + spin_lock_irqsave(&mp->irq_lock, flags); + + status = sbus_readl(lregs + LANAI_ISTAT); + DIRQ(("myri_interrupt: status[%08x] ", status)); + if (status & ISTAT_HOST) { + u32 softstate; + + handled = 1; + DIRQ(("IRQ_DISAB ")); + myri_disable_irq(lregs, mp->cregs); + softstate = sbus_readl(&chan->state); + DIRQ(("state[%08x] ", softstate)); + if (softstate != STATE_READY) { + DIRQ(("myri_not_so_happy ")); + myri_is_not_so_happy(mp); + } + DIRQ(("\nmyri_rx: ")); + myri_rx(mp, dev); + DIRQ(("\nistat=ISTAT_HOST ")); + sbus_writel(ISTAT_HOST, lregs + LANAI_ISTAT); + DIRQ(("IRQ_ENAB ")); + myri_enable_irq(lregs, mp->cregs); + } + DIRQ(("\n")); + + spin_unlock_irqrestore(&mp->irq_lock, flags); + + return IRQ_RETVAL(handled); +} + +static int myri_open(struct net_device *dev) +{ + struct myri_eth *mp = (struct myri_eth *) dev->priv; + + return myri_init(mp, in_interrupt()); +} + +static int myri_close(struct net_device *dev) +{ + struct myri_eth *mp = (struct myri_eth *) dev->priv; + + myri_clean_rings(mp); + return 0; +} + +static void myri_tx_timeout(struct net_device *dev) +{ + struct myri_eth *mp = (struct myri_eth *) dev->priv; + + printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name); + + mp->enet_stats.tx_errors++; + myri_init(mp, 0); + netif_wake_queue(dev); +} + +static int myri_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct myri_eth *mp = (struct myri_eth *) dev->priv; + struct sendq __iomem *sq = mp->sq; + struct myri_txd __iomem *txd; + unsigned long flags; + unsigned int head, tail; + int len, entry; + u32 dma_addr; + + DTX(("myri_start_xmit: ")); + + myri_tx(mp, dev); + + netif_stop_queue(dev); + + /* This is just to prevent multiple PIO reads for TX_BUFFS_AVAIL. */ + head = sbus_readl(&sq->head); + tail = sbus_readl(&sq->tail); + + if (!TX_BUFFS_AVAIL(head, tail)) { + DTX(("no buffs available, returning 1\n")); + return 1; + } + + spin_lock_irqsave(&mp->irq_lock, flags); + + DHDR(("xmit[skbdata(%p)]\n", skb->data)); +#ifdef DEBUG_HEADER + dump_ehdr_and_myripad(((unsigned char *) skb->data)); +#endif + + /* XXX Maybe this can go as well. */ + len = skb->len; + if (len & 3) { + DTX(("len&3 ")); + len = (len + 4) & (~3); + } + + entry = sbus_readl(&sq->tail); + + txd = &sq->myri_txd[entry]; + mp->tx_skbs[entry] = skb; + + /* Must do this before we sbus map it. */ + if (skb->data[MYRI_PAD_LEN] & 0x1) { + sbus_writew(0xffff, &txd->addr[0]); + sbus_writew(0xffff, &txd->addr[1]); + sbus_writew(0xffff, &txd->addr[2]); + sbus_writew(0xffff, &txd->addr[3]); + } else { + sbus_writew(0xffff, &txd->addr[0]); + sbus_writew((skb->data[0] << 8) | skb->data[1], &txd->addr[1]); + sbus_writew((skb->data[2] << 8) | skb->data[3], &txd->addr[2]); + sbus_writew((skb->data[4] << 8) | skb->data[5], &txd->addr[3]); + } + + dma_addr = sbus_map_single(mp->myri_sdev, skb->data, len, SBUS_DMA_TODEVICE); + sbus_writel(dma_addr, &txd->myri_gathers[0].addr); + sbus_writel(len, &txd->myri_gathers[0].len); + sbus_writel(1, &txd->num_sg); + sbus_writel(KERNEL_CHANNEL, &txd->chan); + sbus_writel(len, &txd->len); + sbus_writel((u32)-1, &txd->csum_off); + sbus_writel(0, &txd->csum_field); + + sbus_writel(NEXT_TX(entry), &sq->tail); + DTX(("BangTheChip ")); + bang_the_chip(mp); + + DTX(("tbusy=0, returning 0\n")); + netif_start_queue(dev); + spin_unlock_irqrestore(&mp->irq_lock, flags); + return 0; +} + +/* Create the MyriNet MAC header for an arbitrary protocol layer + * + * saddr=NULL means use device source address + * daddr=NULL means leave destination address (eg unresolved arp) + */ +static int myri_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, + void *daddr, void *saddr, unsigned len) +{ + struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN); + unsigned char *pad = (unsigned char *) skb_push(skb, MYRI_PAD_LEN); + +#ifdef DEBUG_HEADER + DHDR(("myri_header: pad[%02x,%02x] ", pad[0], pad[1])); + dump_ehdr(eth); +#endif + + /* Set the MyriNET padding identifier. */ + pad[0] = MYRI_PAD_LEN; + pad[1] = 0xab; + + /* Set the protocol type. For a packet of type ETH_P_802_3 we put the length + * in here instead. It is up to the 802.2 layer to carry protocol information. + */ + if (type != ETH_P_802_3) + eth->h_proto = htons(type); + else + eth->h_proto = htons(len); + + /* Set the source hardware address. */ + if (saddr) + memcpy(eth->h_source, saddr, dev->addr_len); + else + memcpy(eth->h_source, dev->dev_addr, dev->addr_len); + + /* Anyway, the loopback-device should never use this function... */ + if (dev->flags & IFF_LOOPBACK) { + int i; + for (i = 0; i < dev->addr_len; i++) + eth->h_dest[i] = 0; + return(dev->hard_header_len); + } + + if (daddr) { + memcpy(eth->h_dest, daddr, dev->addr_len); + return dev->hard_header_len; + } + return -dev->hard_header_len; +} + +/* Rebuild the MyriNet MAC header. This is called after an ARP + * (or in future other address resolution) has completed on this + * sk_buff. We now let ARP fill in the other fields. + */ +static int myri_rebuild_header(struct sk_buff *skb) +{ + unsigned char *pad = (unsigned char *) skb->data; + struct ethhdr *eth = (struct ethhdr *) (pad + MYRI_PAD_LEN); + struct net_device *dev = skb->dev; + +#ifdef DEBUG_HEADER + DHDR(("myri_rebuild_header: pad[%02x,%02x] ", pad[0], pad[1])); + dump_ehdr(eth); +#endif + + /* Refill MyriNet padding identifiers, this is just being anal. */ + pad[0] = MYRI_PAD_LEN; + pad[1] = 0xab; + + switch (eth->h_proto) + { +#ifdef CONFIG_INET + case __constant_htons(ETH_P_IP): + return arp_find(eth->h_dest, skb); +#endif + + default: + printk(KERN_DEBUG + "%s: unable to resolve type %X addresses.\n", + dev->name, (int)eth->h_proto); + + memcpy(eth->h_source, dev->dev_addr, dev->addr_len); + return 0; + break; + } + + return 0; +} + +int myri_header_cache(struct neighbour *neigh, struct hh_cache *hh) +{ + unsigned short type = hh->hh_type; + unsigned char *pad; + struct ethhdr *eth; + struct net_device *dev = neigh->dev; + + pad = ((unsigned char *) hh->hh_data) + + HH_DATA_OFF(sizeof(*eth) + MYRI_PAD_LEN); + eth = (struct ethhdr *) (pad + MYRI_PAD_LEN); + + if (type == __constant_htons(ETH_P_802_3)) + return -1; + + /* Refill MyriNet padding identifiers, this is just being anal. */ + pad[0] = MYRI_PAD_LEN; + pad[1] = 0xab; + + eth->h_proto = type; + memcpy(eth->h_source, dev->dev_addr, dev->addr_len); + memcpy(eth->h_dest, neigh->ha, dev->addr_len); + hh->hh_len = 16; + return 0; +} + + +/* Called by Address Resolution module to notify changes in address. */ +void myri_header_cache_update(struct hh_cache *hh, struct net_device *dev, unsigned char * haddr) +{ + memcpy(((u8*)hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)), + haddr, dev->addr_len); +} + +static int myri_change_mtu(struct net_device *dev, int new_mtu) +{ + if ((new_mtu < (ETH_HLEN + MYRI_PAD_LEN)) || (new_mtu > MYRINET_MTU)) + return -EINVAL; + dev->mtu = new_mtu; + return 0; +} + +static struct net_device_stats *myri_get_stats(struct net_device *dev) +{ return &(((struct myri_eth *)dev->priv)->enet_stats); } + +static void myri_set_multicast(struct net_device *dev) +{ + /* Do nothing, all MyriCOM nodes transmit multicast frames + * as broadcast packets... + */ +} + +static inline void set_boardid_from_idprom(struct myri_eth *mp, int num) +{ + mp->eeprom.id[0] = 0; + mp->eeprom.id[1] = idprom->id_machtype; + mp->eeprom.id[2] = (idprom->id_sernum >> 16) & 0xff; + mp->eeprom.id[3] = (idprom->id_sernum >> 8) & 0xff; + mp->eeprom.id[4] = (idprom->id_sernum >> 0) & 0xff; + mp->eeprom.id[5] = num; +} + +static inline void determine_reg_space_size(struct myri_eth *mp) +{ + switch(mp->eeprom.cpuvers) { + case CPUVERS_2_3: + case CPUVERS_3_0: + case CPUVERS_3_1: + case CPUVERS_3_2: + mp->reg_size = (3 * 128 * 1024) + 4096; + break; + + case CPUVERS_4_0: + case CPUVERS_4_1: + mp->reg_size = ((4096<<1) + mp->eeprom.ramsz); + break; + + case CPUVERS_4_2: + case CPUVERS_5_0: + default: + printk("myricom: AIEEE weird cpu version %04x assuming pre4.0\n", + mp->eeprom.cpuvers); + mp->reg_size = (3 * 128 * 1024) + 4096; + }; +} + +#ifdef DEBUG_DETECT +static void dump_eeprom(struct myri_eth *mp) +{ + printk("EEPROM: clockval[%08x] cpuvers[%04x] " + "id[%02x,%02x,%02x,%02x,%02x,%02x]\n", + mp->eeprom.cval, mp->eeprom.cpuvers, + mp->eeprom.id[0], mp->eeprom.id[1], mp->eeprom.id[2], + mp->eeprom.id[3], mp->eeprom.id[4], mp->eeprom.id[5]); + printk("EEPROM: ramsz[%08x]\n", mp->eeprom.ramsz); + printk("EEPROM: fvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n", + mp->eeprom.fvers[0], mp->eeprom.fvers[1], mp->eeprom.fvers[2], + mp->eeprom.fvers[3], mp->eeprom.fvers[4], mp->eeprom.fvers[5], + mp->eeprom.fvers[6], mp->eeprom.fvers[7]); + printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n", + mp->eeprom.fvers[8], mp->eeprom.fvers[9], mp->eeprom.fvers[10], + mp->eeprom.fvers[11], mp->eeprom.fvers[12], mp->eeprom.fvers[13], + mp->eeprom.fvers[14], mp->eeprom.fvers[15]); + printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n", + mp->eeprom.fvers[16], mp->eeprom.fvers[17], mp->eeprom.fvers[18], + mp->eeprom.fvers[19], mp->eeprom.fvers[20], mp->eeprom.fvers[21], + mp->eeprom.fvers[22], mp->eeprom.fvers[23]); + printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n", + mp->eeprom.fvers[24], mp->eeprom.fvers[25], mp->eeprom.fvers[26], + mp->eeprom.fvers[27], mp->eeprom.fvers[28], mp->eeprom.fvers[29], + mp->eeprom.fvers[30], mp->eeprom.fvers[31]); + printk("EEPROM: mvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n", + mp->eeprom.mvers[0], mp->eeprom.mvers[1], mp->eeprom.mvers[2], + mp->eeprom.mvers[3], mp->eeprom.mvers[4], mp->eeprom.mvers[5], + mp->eeprom.mvers[6], mp->eeprom.mvers[7]); + printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n", + mp->eeprom.mvers[8], mp->eeprom.mvers[9], mp->eeprom.mvers[10], + mp->eeprom.mvers[11], mp->eeprom.mvers[12], mp->eeprom.mvers[13], + mp->eeprom.mvers[14], mp->eeprom.mvers[15]); + printk("EEPROM: dlval[%04x] brd_type[%04x] bus_type[%04x] prod_code[%04x]\n", + mp->eeprom.dlval, mp->eeprom.brd_type, mp->eeprom.bus_type, + mp->eeprom.prod_code); + printk("EEPROM: serial_num[%08x]\n", mp->eeprom.serial_num); +} +#endif + +static int __init myri_ether_init(struct sbus_dev *sdev, int num) +{ + static unsigned version_printed; + struct net_device *dev; + struct myri_eth *mp; + unsigned char prop_buf[32]; + int i; + + DET(("myri_ether_init(%p,%d):\n", sdev, num)); + dev = alloc_etherdev(sizeof(struct myri_eth)); + + if (!dev) + return -ENOMEM; + + if (version_printed++ == 0) + printk(version); + + mp = (struct myri_eth *) dev->priv; + spin_lock_init(&mp->irq_lock); + mp->myri_sdev = sdev; + + /* Clean out skb arrays. */ + for (i = 0; i < (RX_RING_SIZE + 1); i++) + mp->rx_skbs[i] = NULL; + + for (i = 0; i < TX_RING_SIZE; i++) + mp->tx_skbs[i] = NULL; + + /* First check for EEPROM information. */ + i = prom_getproperty(sdev->prom_node, "myrinet-eeprom-info", + (char *)&mp->eeprom, sizeof(struct myri_eeprom)); + DET(("prom_getprop(myrinet-eeprom-info) returns %d\n", i)); + if (i == 0 || i == -1) { + /* No eeprom property, must cook up the values ourselves. */ + DET(("No EEPROM: ")); + mp->eeprom.bus_type = BUS_TYPE_SBUS; + mp->eeprom.cpuvers = prom_getintdefault(sdev->prom_node,"cpu_version",0); + mp->eeprom.cval = prom_getintdefault(sdev->prom_node,"clock_value",0); + mp->eeprom.ramsz = prom_getintdefault(sdev->prom_node,"sram_size",0); + DET(("cpuvers[%d] cval[%d] ramsz[%d]\n", mp->eeprom.cpuvers, + mp->eeprom.cval, mp->eeprom.ramsz)); + if (mp->eeprom.cpuvers == 0) { + DET(("EEPROM: cpuvers was zero, setting to %04x\n",CPUVERS_2_3)); + mp->eeprom.cpuvers = CPUVERS_2_3; + } + if (mp->eeprom.cpuvers < CPUVERS_3_0) { + DET(("EEPROM: cpuvers < CPUVERS_3_0, clockval set to zero.\n")); + mp->eeprom.cval = 0; + } + if (mp->eeprom.ramsz == 0) { + DET(("EEPROM: ramsz == 0, setting to 128k\n")); + mp->eeprom.ramsz = (128 * 1024); + } + i = prom_getproperty(sdev->prom_node, "myrinet-board-id", + &prop_buf[0], 10); + DET(("EEPROM: prom_getprop(myrinet-board-id) returns %d\n", i)); + if ((i != 0) && (i != -1)) + memcpy(&mp->eeprom.id[0], &prop_buf[0], 6); + else + set_boardid_from_idprom(mp, num); + i = prom_getproperty(sdev->prom_node, "fpga_version", + &mp->eeprom.fvers[0], 32); + DET(("EEPROM: prom_getprop(fpga_version) returns %d\n", i)); + if (i == 0 || i == -1) + memset(&mp->eeprom.fvers[0], 0, 32); + + if (mp->eeprom.cpuvers == CPUVERS_4_1) { + DET(("EEPROM: cpuvers CPUVERS_4_1, ")); + if (mp->eeprom.ramsz == (128 * 1024)) { + DET(("ramsize 128k, setting to 256k, ")); + mp->eeprom.ramsz = (256 * 1024); + } + if ((mp->eeprom.cval==0x40414041)||(mp->eeprom.cval==0x90449044)){ + DET(("changing cval from %08x to %08x ", + mp->eeprom.cval, 0x50e450e4)); + mp->eeprom.cval = 0x50e450e4; + } + DET(("\n")); + } + } +#ifdef DEBUG_DETECT + dump_eeprom(mp); +#endif + + for (i = 0; i < 6; i++) + dev->dev_addr[i] = mp->eeprom.id[i]; + + determine_reg_space_size(mp); + + /* Map in the MyriCOM register/localram set. */ + if (mp->eeprom.cpuvers < CPUVERS_4_0) { + /* XXX Makes no sense, if control reg is non-existant this + * XXX driver cannot function at all... maybe pre-4.0 is + * XXX only a valid version for PCI cards? Ask feldy... + */ + DET(("Mapping regs for cpuvers < CPUVERS_4_0\n")); + mp->regs = sbus_ioremap(&sdev->resource[0], 0, + mp->reg_size, "MyriCOM Regs"); + if (!mp->regs) { + printk("MyriCOM: Cannot map MyriCOM registers.\n"); + goto err; + } + mp->lanai = mp->regs + (256 * 1024); + mp->lregs = mp->lanai + (0x10000 * 2); + } else { + DET(("Mapping regs for cpuvers >= CPUVERS_4_0\n")); + mp->cregs = sbus_ioremap(&sdev->resource[0], 0, + PAGE_SIZE, "MyriCOM Control Regs"); + mp->lregs = sbus_ioremap(&sdev->resource[0], (256 * 1024), + PAGE_SIZE, "MyriCOM LANAI Regs"); + mp->lanai = + sbus_ioremap(&sdev->resource[0], (512 * 1024), + mp->eeprom.ramsz, "MyriCOM SRAM"); + } + DET(("Registers mapped: cregs[%p] lregs[%p] lanai[%p]\n", + mp->cregs, mp->lregs, mp->lanai)); + + if (mp->eeprom.cpuvers >= CPUVERS_4_0) + mp->shmem_base = 0xf000; + else + mp->shmem_base = 0x8000; + + DET(("Shared memory base is %04x, ", mp->shmem_base)); + + mp->shmem = (struct myri_shmem __iomem *) + (mp->lanai + (mp->shmem_base * 2)); + DET(("shmem mapped at %p\n", mp->shmem)); + + mp->rqack = &mp->shmem->channel.recvqa; + mp->rq = &mp->shmem->channel.recvq; + mp->sq = &mp->shmem->channel.sendq; + + /* Reset the board. */ + DET(("Resetting LANAI\n")); + myri_reset_off(mp->lregs, mp->cregs); + myri_reset_on(mp->cregs); + + /* Turn IRQ's off. */ + myri_disable_irq(mp->lregs, mp->cregs); + + /* Reset once more. */ + myri_reset_on(mp->cregs); + + /* Get the supported DVMA burst sizes from our SBUS. */ + mp->myri_bursts = prom_getintdefault(mp->myri_sdev->bus->prom_node, + "burst-sizes", 0x00); + + if (!sbus_can_burst64(sdev)) + mp->myri_bursts &= ~(DMA_BURST64); + + DET(("MYRI bursts %02x\n", mp->myri_bursts)); + + /* Encode SBUS interrupt level in second control register. */ + i = prom_getint(sdev->prom_node, "interrupts"); + if (i == 0) + i = 4; + DET(("prom_getint(interrupts)==%d, irqlvl set to %04x\n", + i, (1 << i))); + + sbus_writel((1 << i), mp->cregs + MYRICTRL_IRQLVL); + + mp->dev = dev; + dev->open = &myri_open; + dev->stop = &myri_close; + dev->hard_start_xmit = &myri_start_xmit; + dev->tx_timeout = &myri_tx_timeout; + dev->watchdog_timeo = 5*HZ; + dev->get_stats = &myri_get_stats; + dev->set_multicast_list = &myri_set_multicast; + dev->irq = sdev->irqs[0]; + + /* Register interrupt handler now. */ + DET(("Requesting MYRIcom IRQ line.\n")); + if (request_irq(dev->irq, &myri_interrupt, + SA_SHIRQ, "MyriCOM Ethernet", (void *) dev)) { + printk("MyriCOM: Cannot register interrupt handler.\n"); + goto err; + } + + dev->mtu = MYRINET_MTU; + dev->change_mtu = myri_change_mtu; + dev->hard_header = myri_header; + dev->rebuild_header = myri_rebuild_header; + dev->hard_header_len = (ETH_HLEN + MYRI_PAD_LEN); + dev->hard_header_cache = myri_header_cache; + dev->header_cache_update= myri_header_cache_update; + + /* Load code onto the LANai. */ + DET(("Loading LANAI firmware\n")); + myri_load_lanai(mp); + + if (register_netdev(dev)) { + printk("MyriCOM: Cannot register device.\n"); + goto err_free_irq; + } + +#ifdef MODULE + mp->next_module = root_myri_dev; + root_myri_dev = mp; +#endif + + printk("%s: MyriCOM MyriNET Ethernet ", dev->name); + + for (i = 0; i < 6; i++) + printk("%2.2x%c", dev->dev_addr[i], + i == 5 ? ' ' : ':'); + printk("\n"); + + return 0; + +err_free_irq: + free_irq(dev->irq, dev); +err: + /* This will also free the co-allocated 'dev->priv' */ + free_netdev(dev); + return -ENODEV; +} + +static int __init myri_sbus_match(struct sbus_dev *sdev) +{ + char *name = sdev->prom_name; + + if (!strcmp(name, "MYRICOM,mlanai") || + !strcmp(name, "myri")) + return 1; + + return 0; +} + +static int __init myri_sbus_probe(void) +{ + struct sbus_bus *bus; + struct sbus_dev *sdev = NULL; + static int called; + int cards = 0, v; + +#ifdef MODULE + root_myri_dev = NULL; +#endif + + if (called) + return -ENODEV; + called++; + + for_each_sbus(bus) { + for_each_sbusdev(sdev, bus) { + if (myri_sbus_match(sdev)) { + cards++; + DET(("Found myricom myrinet as %s\n", sdev->prom_name)); + if ((v = myri_ether_init(sdev, (cards - 1)))) + return v; + } + } + } + if (!cards) + return -ENODEV; + return 0; +} + +static void __exit myri_sbus_cleanup(void) +{ +#ifdef MODULE + while (root_myri_dev) { + struct myri_eth *next = root_myri_dev->next_module; + + unregister_netdev(root_myri_dev->dev); + /* this will also free the co-allocated 'root_myri_dev' */ + free_netdev(root_myri_dev->dev); + root_myri_dev = next; + } +#endif /* MODULE */ +} + +module_init(myri_sbus_probe); +module_exit(myri_sbus_cleanup); +MODULE_LICENSE("GPL"); |