diff options
Diffstat (limited to 'drivers/net/sgiseeq.c')
| -rw-r--r-- | drivers/net/sgiseeq.c | 773 |
1 files changed, 773 insertions, 0 deletions
diff --git a/drivers/net/sgiseeq.c b/drivers/net/sgiseeq.c new file mode 100644 index 000000000000..9bc3b1c0dd6a --- /dev/null +++ b/drivers/net/sgiseeq.c @@ -0,0 +1,773 @@ +/* + * sgiseeq.c: Seeq8003 ethernet driver for SGI machines. + * + * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/socket.h> +#include <linux/in.h> +#include <linux/route.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/bitops.h> + +#include <asm/byteorder.h> +#include <asm/io.h> +#include <asm/system.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/sgi/hpc3.h> +#include <asm/sgi/ip22.h> +#include <asm/sgialib.h> + +#include "sgiseeq.h" + +static char *version = "sgiseeq.c: David S. Miller (dm@engr.sgi.com)\n"; + +static char *sgiseeqstr = "SGI Seeq8003"; + +/* + * If you want speed, you do something silly, it always has worked for me. So, + * with that in mind, I've decided to make this driver look completely like a + * stupid Lance from a driver architecture perspective. Only difference is that + * here our "ring buffer" looks and acts like a real Lance one does but is + * layed out like how the HPC DMA and the Seeq want it to. You'd be surprised + * how a stupid idea like this can pay off in performance, not to mention + * making this driver 2,000 times easier to write. ;-) + */ + +/* Tune these if we tend to run out often etc. */ +#define SEEQ_RX_BUFFERS 16 +#define SEEQ_TX_BUFFERS 16 + +#define PKT_BUF_SZ 1584 + +#define NEXT_RX(i) (((i) + 1) & (SEEQ_RX_BUFFERS - 1)) +#define NEXT_TX(i) (((i) + 1) & (SEEQ_TX_BUFFERS - 1)) +#define PREV_RX(i) (((i) - 1) & (SEEQ_RX_BUFFERS - 1)) +#define PREV_TX(i) (((i) - 1) & (SEEQ_TX_BUFFERS - 1)) + +#define TX_BUFFS_AVAIL(sp) ((sp->tx_old <= sp->tx_new) ? \ + sp->tx_old + (SEEQ_TX_BUFFERS - 1) - sp->tx_new : \ + sp->tx_old - sp->tx_new - 1) + +#define DEBUG + +struct sgiseeq_rx_desc { + volatile struct hpc_dma_desc rdma; + volatile signed int buf_vaddr; +}; + +struct sgiseeq_tx_desc { + volatile struct hpc_dma_desc tdma; + volatile signed int buf_vaddr; +}; + +/* + * Warning: This structure is layed out in a certain way because HPC dma + * descriptors must be 8-byte aligned. So don't touch this without + * some care. + */ +struct sgiseeq_init_block { /* Note the name ;-) */ + struct sgiseeq_rx_desc rxvector[SEEQ_RX_BUFFERS]; + struct sgiseeq_tx_desc txvector[SEEQ_TX_BUFFERS]; +}; + +struct sgiseeq_private { + struct sgiseeq_init_block *srings; + + /* Ptrs to the descriptors in uncached space. */ + struct sgiseeq_rx_desc *rx_desc; + struct sgiseeq_tx_desc *tx_desc; + + char *name; + struct hpc3_ethregs *hregs; + struct sgiseeq_regs *sregs; + + /* Ring entry counters. */ + unsigned int rx_new, tx_new; + unsigned int rx_old, tx_old; + + int is_edlc; + unsigned char control; + unsigned char mode; + + struct net_device_stats stats; + + struct net_device *next_module; + spinlock_t tx_lock; +}; + +/* A list of all installed seeq devices, for removing the driver module. */ +static struct net_device *root_sgiseeq_dev; + +static inline void hpc3_eth_reset(struct hpc3_ethregs *hregs) +{ + hregs->rx_reset = HPC3_ERXRST_CRESET | HPC3_ERXRST_CLRIRQ; + udelay(20); + hregs->rx_reset = 0; +} + +static inline void reset_hpc3_and_seeq(struct hpc3_ethregs *hregs, + struct sgiseeq_regs *sregs) +{ + hregs->rx_ctrl = hregs->tx_ctrl = 0; + hpc3_eth_reset(hregs); +} + +#define RSTAT_GO_BITS (SEEQ_RCMD_IGOOD | SEEQ_RCMD_IEOF | SEEQ_RCMD_ISHORT | \ + SEEQ_RCMD_IDRIB | SEEQ_RCMD_ICRC) + +static inline void seeq_go(struct sgiseeq_private *sp, + struct hpc3_ethregs *hregs, + struct sgiseeq_regs *sregs) +{ + sregs->rstat = sp->mode | RSTAT_GO_BITS; + hregs->rx_ctrl = HPC3_ERXCTRL_ACTIVE; +} + +static inline void __sgiseeq_set_mac_address(struct net_device *dev) +{ + struct sgiseeq_private *sp = netdev_priv(dev); + struct sgiseeq_regs *sregs = sp->sregs; + int i; + + sregs->tstat = SEEQ_TCMD_RB0; + for (i = 0; i < 6; i++) + sregs->rw.eth_addr[i] = dev->dev_addr[i]; +} + +static int sgiseeq_set_mac_address(struct net_device *dev, void *addr) +{ + struct sgiseeq_private *sp = netdev_priv(dev); + struct sockaddr *sa = addr; + + memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); + + spin_lock_irq(&sp->tx_lock); + __sgiseeq_set_mac_address(dev); + spin_unlock_irq(&sp->tx_lock); + + return 0; +} + +#define TCNTINFO_INIT (HPCDMA_EOX | HPCDMA_ETXD) +#define RCNTCFG_INIT (HPCDMA_OWN | HPCDMA_EORP | HPCDMA_XIE) +#define RCNTINFO_INIT (RCNTCFG_INIT | (PKT_BUF_SZ & HPCDMA_BCNT)) + +static int seeq_init_ring(struct net_device *dev) +{ + struct sgiseeq_private *sp = netdev_priv(dev); + int i; + + netif_stop_queue(dev); + sp->rx_new = sp->tx_new = 0; + sp->rx_old = sp->tx_old = 0; + + __sgiseeq_set_mac_address(dev); + + /* Setup tx ring. */ + for(i = 0; i < SEEQ_TX_BUFFERS; i++) { + if (!sp->tx_desc[i].tdma.pbuf) { + unsigned long buffer; + + buffer = (unsigned long) kmalloc(PKT_BUF_SZ, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + sp->tx_desc[i].buf_vaddr = CKSEG1ADDR(buffer); + sp->tx_desc[i].tdma.pbuf = CPHYSADDR(buffer); + } + sp->tx_desc[i].tdma.cntinfo = TCNTINFO_INIT; + } + + /* And now the rx ring. */ + for (i = 0; i < SEEQ_RX_BUFFERS; i++) { + if (!sp->rx_desc[i].rdma.pbuf) { + unsigned long buffer; + + buffer = (unsigned long) kmalloc(PKT_BUF_SZ, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + sp->rx_desc[i].buf_vaddr = CKSEG1ADDR(buffer); + sp->rx_desc[i].rdma.pbuf = CPHYSADDR(buffer); + } + sp->rx_desc[i].rdma.cntinfo = RCNTINFO_INIT; + } + sp->rx_desc[i - 1].rdma.cntinfo |= HPCDMA_EOR; + return 0; +} + +#ifdef DEBUG +static struct sgiseeq_private *gpriv; +static struct net_device *gdev; + +void sgiseeq_dump_rings(void) +{ + static int once; + struct sgiseeq_rx_desc *r = gpriv->rx_desc; + struct sgiseeq_tx_desc *t = gpriv->tx_desc; + struct hpc3_ethregs *hregs = gpriv->hregs; + int i; + + if (once) + return; + once++; + printk("RING DUMP:\n"); + for (i = 0; i < SEEQ_RX_BUFFERS; i++) { + printk("RX [%d]: @(%p) [%08x,%08x,%08x] ", + i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo, + r[i].rdma.pnext); + i += 1; + printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n", + i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo, + r[i].rdma.pnext); + } + for (i = 0; i < SEEQ_TX_BUFFERS; i++) { + printk("TX [%d]: @(%p) [%08x,%08x,%08x] ", + i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo, + t[i].tdma.pnext); + i += 1; + printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n", + i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo, + t[i].tdma.pnext); + } + printk("INFO: [rx_new = %d rx_old=%d] [tx_new = %d tx_old = %d]\n", + gpriv->rx_new, gpriv->rx_old, gpriv->tx_new, gpriv->tx_old); + printk("RREGS: rx_cbptr[%08x] rx_ndptr[%08x] rx_ctrl[%08x]\n", + hregs->rx_cbptr, hregs->rx_ndptr, hregs->rx_ctrl); + printk("TREGS: tx_cbptr[%08x] tx_ndptr[%08x] tx_ctrl[%08x]\n", + hregs->tx_cbptr, hregs->tx_ndptr, hregs->tx_ctrl); +} +#endif + +#define TSTAT_INIT_SEEQ (SEEQ_TCMD_IPT|SEEQ_TCMD_I16|SEEQ_TCMD_IC|SEEQ_TCMD_IUF) +#define TSTAT_INIT_EDLC ((TSTAT_INIT_SEEQ) | SEEQ_TCMD_RB2) +#define RDMACFG_INIT (HPC3_ERXDCFG_FRXDC | HPC3_ERXDCFG_FEOP | HPC3_ERXDCFG_FIRQ) + +static int init_seeq(struct net_device *dev, struct sgiseeq_private *sp, + struct sgiseeq_regs *sregs) +{ + struct hpc3_ethregs *hregs = sp->hregs; + int err; + + reset_hpc3_and_seeq(hregs, sregs); + err = seeq_init_ring(dev); + if (err) + return err; + + /* Setup to field the proper interrupt types. */ + if (sp->is_edlc) { + sregs->tstat = TSTAT_INIT_EDLC; + sregs->rw.wregs.control = sp->control; + sregs->rw.wregs.frame_gap = 0; + } else { + sregs->tstat = TSTAT_INIT_SEEQ; + } + + hregs->rx_dconfig |= RDMACFG_INIT; + + hregs->rx_ndptr = CPHYSADDR(sp->rx_desc); + hregs->tx_ndptr = CPHYSADDR(sp->tx_desc); + + seeq_go(sp, hregs, sregs); + return 0; +} + +static inline void record_rx_errors(struct sgiseeq_private *sp, + unsigned char status) +{ + if (status & SEEQ_RSTAT_OVERF || + status & SEEQ_RSTAT_SFRAME) + sp->stats.rx_over_errors++; + if (status & SEEQ_RSTAT_CERROR) + sp->stats.rx_crc_errors++; + if (status & SEEQ_RSTAT_DERROR) + sp->stats.rx_frame_errors++; + if (status & SEEQ_RSTAT_REOF) + sp->stats.rx_errors++; +} + +static inline void rx_maybe_restart(struct sgiseeq_private *sp, + struct hpc3_ethregs *hregs, + struct sgiseeq_regs *sregs) +{ + if (!(hregs->rx_ctrl & HPC3_ERXCTRL_ACTIVE)) { + hregs->rx_ndptr = CPHYSADDR(sp->rx_desc + sp->rx_new); + seeq_go(sp, hregs, sregs); + } +} + +#define for_each_rx(rd, sp) for((rd) = &(sp)->rx_desc[(sp)->rx_new]; \ + !((rd)->rdma.cntinfo & HPCDMA_OWN); \ + (rd) = &(sp)->rx_desc[(sp)->rx_new]) + +static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp, + struct hpc3_ethregs *hregs, + struct sgiseeq_regs *sregs) +{ + struct sgiseeq_rx_desc *rd; + struct sk_buff *skb = 0; + unsigned char pkt_status; + unsigned char *pkt_pointer = 0; + int len = 0; + unsigned int orig_end = PREV_RX(sp->rx_new); + + /* Service every received packet. */ + for_each_rx(rd, sp) { + len = PKT_BUF_SZ - (rd->rdma.cntinfo & HPCDMA_BCNT) - 3; + pkt_pointer = (unsigned char *)(long)rd->buf_vaddr; + pkt_status = pkt_pointer[len + 2]; + + if (pkt_status & SEEQ_RSTAT_FIG) { + /* Packet is OK. */ + skb = dev_alloc_skb(len + 2); + + if (skb) { + skb->dev = dev; + skb_reserve(skb, 2); + skb_put(skb, len); + + /* Copy out of kseg1 to avoid silly cache flush. */ + eth_copy_and_sum(skb, pkt_pointer + 2, len, 0); + skb->protocol = eth_type_trans(skb, dev); + + /* We don't want to receive our own packets */ + if (memcmp(eth_hdr(skb)->h_source, dev->dev_addr, ETH_ALEN)) { + netif_rx(skb); + dev->last_rx = jiffies; + sp->stats.rx_packets++; + sp->stats.rx_bytes += len; + } else { + /* Silently drop my own packets */ + dev_kfree_skb_irq(skb); + } + } else { + printk (KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", + dev->name); + sp->stats.rx_dropped++; + } + } else { + record_rx_errors(sp, pkt_status); + } + + /* Return the entry to the ring pool. */ + rd->rdma.cntinfo = RCNTINFO_INIT; + sp->rx_new = NEXT_RX(sp->rx_new); + } + sp->rx_desc[orig_end].rdma.cntinfo &= ~(HPCDMA_EOR); + sp->rx_desc[PREV_RX(sp->rx_new)].rdma.cntinfo |= HPCDMA_EOR; + rx_maybe_restart(sp, hregs, sregs); +} + +static inline void tx_maybe_reset_collisions(struct sgiseeq_private *sp, + struct sgiseeq_regs *sregs) +{ + if (sp->is_edlc) { + sregs->rw.wregs.control = sp->control & ~(SEEQ_CTRL_XCNT); + sregs->rw.wregs.control = sp->control; + } +} + +static inline void kick_tx(struct sgiseeq_tx_desc *td, + struct hpc3_ethregs *hregs) +{ + /* If the HPC aint doin nothin, and there are more packets + * with ETXD cleared and XIU set we must make very certain + * that we restart the HPC else we risk locking up the + * adapter. The following code is only safe iff the HPCDMA + * is not active! + */ + while ((td->tdma.cntinfo & (HPCDMA_XIU | HPCDMA_ETXD)) == + (HPCDMA_XIU | HPCDMA_ETXD)) + td = (struct sgiseeq_tx_desc *)(long) CKSEG1ADDR(td->tdma.pnext); + if (td->tdma.cntinfo & HPCDMA_XIU) { + hregs->tx_ndptr = CPHYSADDR(td); + hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE; + } +} + +static inline void sgiseeq_tx(struct net_device *dev, struct sgiseeq_private *sp, + struct hpc3_ethregs *hregs, + struct sgiseeq_regs *sregs) +{ + struct sgiseeq_tx_desc *td; + unsigned long status = hregs->tx_ctrl; + int j; + + tx_maybe_reset_collisions(sp, sregs); + + if (!(status & (HPC3_ETXCTRL_ACTIVE | SEEQ_TSTAT_PTRANS))) { + /* Oops, HPC detected some sort of error. */ + if (status & SEEQ_TSTAT_R16) + sp->stats.tx_aborted_errors++; + if (status & SEEQ_TSTAT_UFLOW) + sp->stats.tx_fifo_errors++; + if (status & SEEQ_TSTAT_LCLS) + sp->stats.collisions++; + } + + /* Ack 'em... */ + for (j = sp->tx_old; j != sp->tx_new; j = NEXT_TX(j)) { + td = &sp->tx_desc[j]; + + if (!(td->tdma.cntinfo & (HPCDMA_XIU))) + break; + if (!(td->tdma.cntinfo & (HPCDMA_ETXD))) { + if (!(status & HPC3_ETXCTRL_ACTIVE)) { + hregs->tx_ndptr = CPHYSADDR(td); + hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE; + } + break; + } + sp->stats.tx_packets++; + sp->tx_old = NEXT_TX(sp->tx_old); + td->tdma.cntinfo &= ~(HPCDMA_XIU | HPCDMA_XIE); + td->tdma.cntinfo |= HPCDMA_EOX; + } +} + +static irqreturn_t sgiseeq_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = (struct net_device *) dev_id; + struct sgiseeq_private *sp = netdev_priv(dev); + struct hpc3_ethregs *hregs = sp->hregs; + struct sgiseeq_regs *sregs = sp->sregs; + + spin_lock(&sp->tx_lock); + + /* Ack the IRQ and set software state. */ + hregs->rx_reset = HPC3_ERXRST_CLRIRQ; + + /* Always check for received packets. */ + sgiseeq_rx(dev, sp, hregs, sregs); + + /* Only check for tx acks if we have something queued. */ + if (sp->tx_old != sp->tx_new) + sgiseeq_tx(dev, sp, hregs, sregs); + + if ((TX_BUFFS_AVAIL(sp) > 0) && netif_queue_stopped(dev)) { + netif_wake_queue(dev); + } + spin_unlock(&sp->tx_lock); + + return IRQ_HANDLED; +} + +static int sgiseeq_open(struct net_device *dev) +{ + struct sgiseeq_private *sp = netdev_priv(dev); + struct sgiseeq_regs *sregs = sp->sregs; + unsigned int irq = dev->irq; + int err; + + if (request_irq(irq, sgiseeq_interrupt, 0, sgiseeqstr, dev)) { + printk(KERN_ERR "Seeq8003: Can't get irq %d\n", dev->irq); + err = -EAGAIN; + } + + err = init_seeq(dev, sp, sregs); + if (err) + goto out_free_irq; + + netif_start_queue(dev); + + return 0; + +out_free_irq: + free_irq(irq, dev); + + return err; +} + +static int sgiseeq_close(struct net_device *dev) +{ + struct sgiseeq_private *sp = netdev_priv(dev); + struct sgiseeq_regs *sregs = sp->sregs; + + netif_stop_queue(dev); + + /* Shutdown the Seeq. */ + reset_hpc3_and_seeq(sp->hregs, sregs); + + return 0; +} + +static inline int sgiseeq_reset(struct net_device *dev) +{ + struct sgiseeq_private *sp = netdev_priv(dev); + struct sgiseeq_regs *sregs = sp->sregs; + int err; + + err = init_seeq(dev, sp, sregs); + if (err) + return err; + + dev->trans_start = jiffies; + netif_wake_queue(dev); + + return 0; +} + +void sgiseeq_my_reset(void) +{ + printk("RESET!\n"); + sgiseeq_reset(gdev); +} + +static int sgiseeq_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct sgiseeq_private *sp = netdev_priv(dev); + struct hpc3_ethregs *hregs = sp->hregs; + unsigned long flags; + struct sgiseeq_tx_desc *td; + int skblen, len, entry; + + spin_lock_irqsave(&sp->tx_lock, flags); + + /* Setup... */ + skblen = skb->len; + len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen; + sp->stats.tx_bytes += len; + entry = sp->tx_new; + td = &sp->tx_desc[entry]; + + /* Create entry. There are so many races with adding a new + * descriptor to the chain: + * 1) Assume that the HPC is off processing a DMA chain while + * we are changing all of the following. + * 2) Do no allow the HPC to look at a new descriptor until + * we have completely set up it's state. This means, do + * not clear HPCDMA_EOX in the current last descritptor + * until the one we are adding looks consistent and could + * be processes right now. + * 3) The tx interrupt code must notice when we've added a new + * entry and the HPC got to the end of the chain before we + * added this new entry and restarted it. + */ + memcpy((char *)(long)td->buf_vaddr, skb->data, skblen); + if (len != skblen) + memset((char *)(long)td->buf_vaddr + skb->len, 0, len-skblen); + td->tdma.cntinfo = (len & HPCDMA_BCNT) | + HPCDMA_XIU | HPCDMA_EOXP | HPCDMA_XIE | HPCDMA_EOX; + if (sp->tx_old != sp->tx_new) { + struct sgiseeq_tx_desc *backend; + + backend = &sp->tx_desc[PREV_TX(sp->tx_new)]; + backend->tdma.cntinfo &= ~HPCDMA_EOX; + } + sp->tx_new = NEXT_TX(sp->tx_new); /* Advance. */ + + /* Maybe kick the HPC back into motion. */ + if (!(hregs->tx_ctrl & HPC3_ETXCTRL_ACTIVE)) + kick_tx(&sp->tx_desc[sp->tx_old], hregs); + + dev->trans_start = jiffies; + dev_kfree_skb(skb); + + if (!TX_BUFFS_AVAIL(sp)) + netif_stop_queue(dev); + spin_unlock_irqrestore(&sp->tx_lock, flags); + + return 0; +} + +static void timeout(struct net_device *dev) +{ + printk(KERN_NOTICE "%s: transmit timed out, resetting\n", dev->name); + sgiseeq_reset(dev); + + dev->trans_start = jiffies; + netif_wake_queue(dev); +} + +static struct net_device_stats *sgiseeq_get_stats(struct net_device *dev) +{ + struct sgiseeq_private *sp = netdev_priv(dev); + + return &sp->stats; +} + +static void sgiseeq_set_multicast(struct net_device *dev) +{ + struct sgiseeq_private *sp = (struct sgiseeq_private *) dev->priv; + unsigned char oldmode = sp->mode; + + if(dev->flags & IFF_PROMISC) + sp->mode = SEEQ_RCMD_RANY; + else if ((dev->flags & IFF_ALLMULTI) || dev->mc_count) + sp->mode = SEEQ_RCMD_RBMCAST; + else + sp->mode = SEEQ_RCMD_RBCAST; + + /* XXX I know this sucks, but is there a better way to reprogram + * XXX the receiver? At least, this shouldn't happen too often. + */ + + if (oldmode != sp->mode) + sgiseeq_reset(dev); +} + +static inline void setup_tx_ring(struct sgiseeq_tx_desc *buf, int nbufs) +{ + int i = 0; + + while (i < (nbufs - 1)) { + buf[i].tdma.pnext = CPHYSADDR(buf + i + 1); + buf[i].tdma.pbuf = 0; + i++; + } + buf[i].tdma.pnext = CPHYSADDR(buf); +} + +static inline void setup_rx_ring(struct sgiseeq_rx_desc *buf, int nbufs) +{ + int i = 0; + + while (i < (nbufs - 1)) { + buf[i].rdma.pnext = CPHYSADDR(buf + i + 1); + buf[i].rdma.pbuf = 0; + i++; + } + buf[i].rdma.pbuf = 0; + buf[i].rdma.pnext = CPHYSADDR(buf); +} + +#define ALIGNED(x) ((((unsigned long)(x)) + 0xf) & ~(0xf)) + +static int sgiseeq_init(struct hpc3_regs* regs, int irq) +{ + struct sgiseeq_init_block *sr; + struct sgiseeq_private *sp; + struct net_device *dev; + int err, i; + + dev = alloc_etherdev(sizeof (struct sgiseeq_private)); + if (!dev) { + printk(KERN_ERR "Sgiseeq: Etherdev alloc failed, aborting.\n"); + err = -ENOMEM; + goto err_out; + } + sp = netdev_priv(dev); + + /* Make private data page aligned */ + sr = (struct sgiseeq_init_block *) get_zeroed_page(GFP_KERNEL); + if (!sr) { + printk(KERN_ERR "Sgiseeq: Page alloc failed, aborting.\n"); + err = -ENOMEM; + goto err_out_free_dev; + } + sp->srings = sr; + +#define EADDR_NVOFS 250 + for (i = 0; i < 3; i++) { + unsigned short tmp = ip22_nvram_read(EADDR_NVOFS / 2 + i); + + dev->dev_addr[2 * i] = tmp >> 8; + dev->dev_addr[2 * i + 1] = tmp & 0xff; + } + +#ifdef DEBUG + gpriv = sp; + gdev = dev; +#endif + sp->sregs = (struct sgiseeq_regs *) &hpc3c0->eth_ext[0]; + sp->hregs = &hpc3c0->ethregs; + sp->name = sgiseeqstr; + sp->mode = SEEQ_RCMD_RBCAST; + + sp->rx_desc = (struct sgiseeq_rx_desc *) + CKSEG1ADDR(ALIGNED(&sp->srings->rxvector[0])); + dma_cache_wback_inv((unsigned long)&sp->srings->rxvector, + sizeof(sp->srings->rxvector)); + sp->tx_desc = (struct sgiseeq_tx_desc *) + CKSEG1ADDR(ALIGNED(&sp->srings->txvector[0])); + dma_cache_wback_inv((unsigned long)&sp->srings->txvector, + sizeof(sp->srings->txvector)); + + /* A couple calculations now, saves many cycles later. */ + setup_rx_ring(sp->rx_desc, SEEQ_RX_BUFFERS); + setup_tx_ring(sp->tx_desc, SEEQ_TX_BUFFERS); + + /* Reset the chip. */ + hpc3_eth_reset(sp->hregs); + + sp->is_edlc = !(sp->sregs->rw.rregs.collision_tx[0] & 0xff); + if (sp->is_edlc) + sp->control = SEEQ_CTRL_XCNT | SEEQ_CTRL_ACCNT | + SEEQ_CTRL_SFLAG | SEEQ_CTRL_ESHORT | + SEEQ_CTRL_ENCARR; + + dev->open = sgiseeq_open; + dev->stop = sgiseeq_close; + dev->hard_start_xmit = sgiseeq_start_xmit; + dev->tx_timeout = timeout; + dev->watchdog_timeo = (200 * HZ) / 1000; + dev->get_stats = sgiseeq_get_stats; + dev->set_multicast_list = sgiseeq_set_multicast; + dev->set_mac_address = sgiseeq_set_mac_address; + dev->irq = irq; + + if (register_netdev(dev)) { + printk(KERN_ERR "Sgiseeq: Cannot register net device, " + "aborting.\n"); + err = -ENODEV; + goto err_out_free_page; + } + + printk(KERN_INFO "%s: SGI Seeq8003 ", dev->name); + for (i = 0; i < 6; i++) + printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':'); + + sp->next_module = root_sgiseeq_dev; + root_sgiseeq_dev = dev; + + return 0; + +err_out_free_page: + free_page((unsigned long) sp); +err_out_free_dev: + kfree(dev); + +err_out: + return err; +} + +static int __init sgiseeq_probe(void) +{ + printk(version); + + /* On board adapter on 1st HPC is always present */ + return sgiseeq_init(hpc3c0, SGI_ENET_IRQ); +} + +static void __exit sgiseeq_exit(void) +{ + struct net_device *next, *dev; + struct sgiseeq_private *sp; + int irq; + + for (dev = root_sgiseeq_dev; dev; dev = next) { + sp = (struct sgiseeq_private *) netdev_priv(dev); + next = sp->next_module; + irq = dev->irq; + unregister_netdev(dev); + free_irq(irq, dev); + free_page((unsigned long) sp); + free_netdev(dev); + } +} + +module_init(sgiseeq_probe); +module_exit(sgiseeq_exit); + +MODULE_LICENSE("GPL"); |