myri_sbus.c

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	struct net_device *dev = neigh->dev;

	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) + 2, 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); }

#define CRC_POLYNOMIAL_BE 0x04c11db7UL  /* Ethernet CRC, big endian */
#define CRC_POLYNOMIAL_LE 0xedb88320UL  /* Ethernet CRC, little endian */

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 net_device *dev, struct sbus_dev *sdev, int num)
{
	static unsigned version_printed = 0;
	struct myri_eth *mp;
	unsigned char prop_buf[32];
	int i;

	DET(("myri_ether_init(%p,%p,%d):\n", dev, sdev, num));
	dev = init_etherdev(0, sizeof(struct myri_eth));

	if (version_printed++ == 0)
		printk(version);

	printk("%s: MyriCOM MyriNET Ethernet ", dev->name);

	mp = (struct myri_eth *) dev->priv;
	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++)
		printk("%2.2x%c",
		       dev->dev_addr[i] = mp->eeprom.id[i],
		       i == 5 ? ' ' : ':');
	printk("\n");

	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");
			return -ENODEV;
		}
		mp->lanai = (unsigned short *) (mp->regs + (256 * 1024));
		mp->lanai3 = (unsigned int *) mp->lanai;
		mp->lregs = (unsigned long) &mp->lanai[0x10000];
	} 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 = (unsigned short *)
			sbus_ioremap(&sdev->resource[0], (512 * 1024),
				     mp->eeprom.ramsz, "MyriCOM SRAM");
		mp->lanai3 = (unsigned int *) mp->lanai;
	}
	DET(("Registers mapped: cregs[%lx] lregs[%lx] lanai[%p] lanai3[%p]\n",
	     mp->cregs, mp->lregs, mp->lanai, mp->lanai3));

	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 *) &mp->lanai[mp->shmem_base];
	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");
		return -ENODEV;
	}

	DET(("ether_setup()\n"));
	ether_setup(dev);

	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);

#ifdef MODULE
	dev->ifindex = dev_new_index();
	mp->next_module = root_myri_dev;
	root_myri_dev = mp;
#endif
	return 0;
}

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 net_device *dev = NULL;
	struct sbus_bus *bus;
	struct sbus_dev *sdev = 0;
	static int called = 0;
	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 (cards)
				dev = NULL;
			if (myri_sbus_match(sdev)) {
				cards++;
				DET(("Found myricom myrinet as %s\n", sdev->prom_name));
				if ((v = myri_ether_init(dev, sdev, (cards - 1))))
					return v;
			}
		}
	}
	if (!cards)
		return -ENODEV;
	return 0;
}

static void __exit myri_sbus_cleanup(void)
{
#ifdef MODULE
	/* No need to check MOD_IN_USE, as sys_delete_module() checks. */
	while (root_myri_dev) {
		struct myri_eth *next = root_myri_dev->next_module;

		unregister_netdev(root_myri_dev->dev);
		kfree(root_myri_dev->dev);
		root_myri_dev = next;
	}
#endif /* MODULE */
}

module_init(myri_sbus_probe);
module_exit(myri_sbus_cleanup);