e100_main.c

linux-2.4.29操作系统的源码

	e100_set_int_option(&(bdp->params.BundleMax), BundleMax[board], 0x1,
			    0xFFFF, E100_DEFAULT_CPUSAVER_BUNDLE_MAX,
			    "CPU saver bundle max value");

}

/**
 * e100_set_int_option - check and set an integer option
 * @option: a pointer to the relevant option field
 * @val: the value specified
 * @min: the minimum valid value
 * @max: the maximum valid value
 * @default_val: the default value
 * @name: the name of the option
 *
 * This routine does range checking on a command-line option.
 * If the option's value is '-1' use the specified default.
 * Otherwise, if the value is invalid, change it to the default.
 */
void __devinit
e100_set_int_option(int *option, int val, int min, int max, int default_val,
		    char *name)
{
	if (val == -1) {	/* no value specified. use default */
		*option = default_val;

	} else if ((val < min) || (val > max)) {
		printk(KERN_NOTICE
		       "e100: Invalid %s specified (%i). "
		       "Valid range is %i-%i\n",
		       name, val, min, max);
		printk(KERN_NOTICE "e100: Using default %s of %i\n", name,
		       default_val);
		*option = default_val;
	} else {
		printk(KERN_INFO "e100: Using specified %s of %i\n", name, val);
		*option = val;
	}
}

/**
 * e100_set_bool_option - check and set a boolean option
 * @bdp: atapter's private data struct
 * @val: the value specified
 * @mask: the mask for the relevant option
 * @default_val: the default value
 * @name: the name of the option
 *
 * This routine checks a boolean command-line option.
 * If the option's value is '-1' use the specified default.
 * Otherwise, if the value is invalid (not 0 or 1), 
 * change it to the default.
 */
void __devinit
e100_set_bool_option(struct e100_private *bdp, int val, u32 mask,
		     int default_val, char *name)
{
	if (val == -1) {
		if (default_val)
			bdp->params.b_params |= mask;

	} else if ((val != true) && (val != false)) {
		printk(KERN_NOTICE
		       "e100: Invalid %s specified (%i). "
		       "Valid values are %i/%i\n",
		       name, val, false, true);
		printk(KERN_NOTICE "e100: Using default %s of %i\n", name,
		       default_val);

		if (default_val)
			bdp->params.b_params |= mask;
	} else {
		printk(KERN_INFO "e100: Using specified %s of %i\n", name, val);
		if (val)
			bdp->params.b_params |= mask;
	}
}

int
e100_open(struct net_device *dev)
{
	struct e100_private *bdp;
	int rc = 0;

	bdp = dev->priv;

	/* setup the tcb pool */
	if (!e100_alloc_tcb_pool(bdp)) {
		rc = -ENOMEM;
		goto err_exit;
	}
	bdp->last_tcb = NULL;

	bdp->tcb_pool.head = 0;
	bdp->tcb_pool.tail = 1;	

	e100_setup_tcb_pool((tcb_t *) bdp->tcb_pool.data,
			    bdp->params.TxDescriptors, bdp);

	if (!e100_alloc_rfd_pool(bdp)) {
		rc = -ENOMEM;
		goto err_exit;
	}

	if (!e100_wait_exec_cmplx(bdp, 0, SCB_CUC_LOAD_BASE, 0)) {
		rc = -EAGAIN;
		goto err_exit;
	}

	if (!e100_wait_exec_cmplx(bdp, 0, SCB_RUC_LOAD_BASE, 0)) {
		rc = -EAGAIN;
		goto err_exit;
	}

	mod_timer(&(bdp->watchdog_timer), jiffies + (2 * HZ));

	if (dev->flags & IFF_UP)
		/* Otherwise process may sleep forever */
		netif_wake_queue(dev);
	else
		netif_start_queue(dev);

	e100_start_ru(bdp);
	if ((rc = request_irq(dev->irq, &e100intr, SA_SHIRQ,
			      dev->name, dev)) != 0) {
		del_timer_sync(&bdp->watchdog_timer);
		goto err_exit;
	}
	bdp->intr_mask = 0;
	e100_set_intr_mask(bdp);

	e100_force_config(bdp);

	goto exit;

err_exit:
	e100_clear_pools(bdp);
exit:
	return rc;
}

int
e100_close(struct net_device *dev)
{
	struct e100_private *bdp = dev->priv;

	e100_disable_clear_intr(bdp);
	free_irq(dev->irq, dev);
	bdp->intr_mask = SCB_INT_MASK;
	e100_isolate_driver(bdp);

	netif_carrier_off(bdp->device);
	bdp->cur_line_speed = 0;
	bdp->cur_dplx_mode = 0;
	e100_clear_pools(bdp);

	return 0;
}

static int
e100_change_mtu(struct net_device *dev, int new_mtu)
{
	if ((new_mtu < 68) || (new_mtu > (ETH_DATA_LEN + VLAN_SIZE)))
		return -EINVAL;

	dev->mtu = new_mtu;
	return 0;
}

/**
 * e100_prepare_xmit_buff - prepare a buffer for transmission
 * @bdp: atapter's private data struct
 * @skb: skb to send
 *
 * This routine prepare a buffer for transmission. It checks
 * the message length for the appropiate size. It picks up a
 * free tcb from the TCB pool and sets up the corresponding
 * TBD's. If the number of fragments are more than the number
 * of TBD/TCB it copies all the fragments in a coalesce buffer.
 * It returns a pointer to the prepared TCB.
 */
static inline tcb_t *
e100_prepare_xmit_buff(struct e100_private *bdp, struct sk_buff *skb)
{
	tcb_t *tcb, *prev_tcb;

	tcb = bdp->tcb_pool.data;
	tcb += TCB_TO_USE(bdp->tcb_pool);

	if (bdp->flags & USE_IPCB) {
		tcb->tcbu.ipcb.ip_activation_high = IPCB_IP_ACTIVATION_DEFAULT;
		tcb->tcbu.ipcb.ip_schedule &= ~IPCB_TCP_PACKET;
		tcb->tcbu.ipcb.ip_schedule &= ~IPCB_TCPUDP_CHECKSUM_ENABLE;
	}

	if(bdp->vlgrp && vlan_tx_tag_present(skb)) {
		(tcb->tcbu).ipcb.ip_activation_high |= IPCB_INSERTVLAN_ENABLE;
		(tcb->tcbu).ipcb.vlan = cpu_to_be16(vlan_tx_tag_get(skb));
	}
	
	tcb->tcb_hdr.cb_status = 0;
	tcb->tcb_thrshld = bdp->tx_thld;
	tcb->tcb_hdr.cb_cmd |= __constant_cpu_to_le16(CB_S_BIT);

	/* Set I (Interrupt) bit on every (TX_FRAME_CNT)th packet */
	if (!(++bdp->tx_count % TX_FRAME_CNT))
		tcb->tcb_hdr.cb_cmd |= __constant_cpu_to_le16(CB_I_BIT);
	else
		/* Clear I bit on other packets */
		tcb->tcb_hdr.cb_cmd &= ~__constant_cpu_to_le16(CB_I_BIT);

	tcb->tcb_skb = skb;

	if (skb->ip_summed == CHECKSUM_HW) {
		const struct iphdr *ip = skb->nh.iph;

		if ((ip->protocol == IPPROTO_TCP) ||
		    (ip->protocol == IPPROTO_UDP)) {

			tcb->tcbu.ipcb.ip_activation_high |=
				IPCB_HARDWAREPARSING_ENABLE;
			tcb->tcbu.ipcb.ip_schedule |=
				IPCB_TCPUDP_CHECKSUM_ENABLE;

			if (ip->protocol == IPPROTO_TCP)
				tcb->tcbu.ipcb.ip_schedule |= IPCB_TCP_PACKET;
		}
	}

	if (!skb_shinfo(skb)->nr_frags) {
		(tcb->tbd_ptr)->tbd_buf_addr =
			cpu_to_le32(pci_map_single(bdp->pdev, skb->data,
						   skb->len, PCI_DMA_TODEVICE));
		(tcb->tbd_ptr)->tbd_buf_cnt = cpu_to_le16(skb->len);
		tcb->tcb_tbd_num = 1;
		tcb->tcb_tbd_ptr = tcb->tcb_tbd_dflt_ptr;
	} else {
		int i;
		void *addr;
		tbd_t *tbd_arr_ptr = &(tcb->tbd_ptr[1]);
		skb_frag_t *frag = &skb_shinfo(skb)->frags[0];

		(tcb->tbd_ptr)->tbd_buf_addr =
			cpu_to_le32(pci_map_single(bdp->pdev, skb->data,
						   skb_headlen(skb),
						   PCI_DMA_TODEVICE));
		(tcb->tbd_ptr)->tbd_buf_cnt =
			cpu_to_le16(skb_headlen(skb));

		for (i = 0; i < skb_shinfo(skb)->nr_frags;
		     i++, tbd_arr_ptr++, frag++) {

			addr = ((void *) page_address(frag->page) +
				frag->page_offset);

			tbd_arr_ptr->tbd_buf_addr =
				cpu_to_le32(pci_map_single(bdp->pdev,
							   addr, frag->size,
							   PCI_DMA_TODEVICE));
			tbd_arr_ptr->tbd_buf_cnt = cpu_to_le16(frag->size);
		}
		tcb->tcb_tbd_num = skb_shinfo(skb)->nr_frags + 1;
		tcb->tcb_tbd_ptr = tcb->tcb_tbd_expand_ptr;
	}

	/* clear the S-BIT on the previous tcb */
	prev_tcb = bdp->tcb_pool.data;
	prev_tcb += PREV_TCB_USED(bdp->tcb_pool);
	prev_tcb->tcb_hdr.cb_cmd &= __constant_cpu_to_le16((u16) ~CB_S_BIT);

	bdp->tcb_pool.tail = NEXT_TCB_TOUSE(bdp->tcb_pool.tail);

	wmb();

	e100_start_cu(bdp, tcb);

	return tcb;
}

static int
e100_xmit_frame(struct sk_buff *skb, struct net_device *dev)
{
	int rc = 0;
	int notify_stop = false;
	struct e100_private *bdp = dev->priv;

	if (!spin_trylock(&bdp->bd_non_tx_lock)) {
		notify_stop = true;
		rc = 1;
		goto exit2;
	}

	/* tcb list may be empty temporarily during releasing resources */
	if (!TCBS_AVAIL(bdp->tcb_pool) || (bdp->tcb_phys == 0) ||
	    (bdp->non_tx_command_state != E100_NON_TX_IDLE)) {
		notify_stop = true;
		rc = 1;
		goto exit1;
	}

	bdp->drv_stats.net_stats.tx_bytes += skb->len;

	e100_prepare_xmit_buff(bdp, skb);

	dev->trans_start = jiffies;

exit1:
	spin_unlock(&bdp->bd_non_tx_lock);
exit2:
	if (notify_stop) {
		netif_stop_queue(dev);
	}

	return rc;
}

/**
 * e100_get_stats - get driver statistics
 * @dev: adapter's net_device struct
 *
 * This routine is called when the OS wants the adapter's stats returned.
 * It returns the address of the net_device_stats stucture for the device.
 * If the statistics are currently being updated, then they might be incorrect
 * for a short while. However, since this cannot actually cause damage, no
 * locking is used.
 */
struct net_device_stats *
e100_get_stats(struct net_device *dev)
{
	struct e100_private *bdp = dev->priv;

	bdp->drv_stats.net_stats.tx_errors =
		bdp->drv_stats.net_stats.tx_carrier_errors +
		bdp->drv_stats.net_stats.tx_aborted_errors;

	bdp->drv_stats.net_stats.rx_errors =
		bdp->drv_stats.net_stats.rx_crc_errors +
		bdp->drv_stats.net_stats.rx_frame_errors +
		bdp->drv_stats.net_stats.rx_length_errors +
		bdp->drv_stats.rcv_cdt_frames;

	return &(bdp->drv_stats.net_stats);
}

/**
 * e100_set_mac - set the MAC address
 * @dev: adapter's net_device struct
 * @addr: the new address
 *
 * This routine sets the ethernet address of the board
 * Returns:
 * 0  - if successful
 * -1 - otherwise
 */
static int
e100_set_mac(struct net_device *dev, void *addr)
{
	struct e100_private *bdp;
	int rc = -1;
	struct sockaddr *p_sockaddr = (struct sockaddr *) addr;

	if (!is_valid_ether_addr(p_sockaddr->sa_data))
		return -EADDRNOTAVAIL;
	bdp = dev->priv;

	if (e100_setup_iaaddr(bdp, (u8 *) (p_sockaddr->sa_data))) {
		memcpy(&(dev->dev_addr[0]), p_sockaddr->sa_data, ETH_ALEN);
		rc = 0;
	}

	return rc;
}

static void
e100_set_multi_exec(struct net_device *dev)
{
	struct e100_private *bdp = dev->priv;
	mltcst_cb_t *mcast_buff;
	cb_header_t *cb_hdr;
	struct dev_mc_list *mc_list;
	unsigned int i;
	nxmit_cb_entry_t *cmd = e100_alloc_non_tx_cmd(bdp);

	if (cmd != NULL) {
		mcast_buff = &((cmd->non_tx_cmd)->ntcb.multicast);
		cb_hdr = &((cmd->non_tx_cmd)->ntcb.multicast.mc_cbhdr);
	} else {
		return;
	}

	/* initialize the multi cast command */
	cb_hdr->cb_cmd = __constant_cpu_to_le16(CB_MULTICAST);

	/* now fill in the rest of the multicast command */
	*(u16 *) (&(mcast_buff->mc_count)) = cpu_to_le16(dev->mc_count * 6);
	for (i = 0, mc_list = dev->mc_list;
	     (i < dev->mc_count) && (i < MAX_MULTICAST_ADDRS);
	     i++, mc_list = mc_list->next) {
		/* copy into the command */
		memcpy(&(mcast_buff->mc_addr[i * ETH_ALEN]),
		       (u8 *) &(mc_list->dmi_addr), ETH_ALEN);
	}

	if (!e100_exec_non_cu_cmd(bdp, cmd)) {
		printk(KERN_WARNING "e100: %s: Multicast setup failed\n", 
		       dev->name);
	}
}

/**
 * e100_set_multi - set multicast status
 * @dev: adapter's net_device struct
 *
 * This routine is called to add or remove multicast addresses, and/or to
 * change the adapter's promiscuous state.
 */
static void
e100_set_multi(struct net_device *dev)
{
	struct e100_private *bdp = dev->priv;
	unsigned char promisc_enbl;
	unsigned char mulcast_enbl;

	promisc_enbl = ((dev->flags & IFF_PROMISC) == IFF_PROMISC);
	mulcast_enbl = ((dev->flags & IFF_ALLMULTI) ||
			(dev->mc_count > MAX_MULTICAST_ADDRS));

	e100_config_promisc(bdp, promisc_enbl);
	e100_config_mulcast_enbl(bdp, mulcast_enbl);

	/* reconfigure the chip if something has changed in its config space */
	e100_config(bdp);

	if (promisc_enbl || mulcast_enbl) {
		return;	/* no need for Multicast Cmd */
	}

	/* get the multicast CB */
	e100_set_multi_exec(dev);
}

static int
e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{

	switch (cmd) {

	case SIOCETHTOOL:
		return e100_do_ethtool_ioctl(dev, ifr);
		break;

	case SIOCGMIIPHY:	/* Get address of MII PHY in use. */
	case SIOCGMIIREG:	/* Read MII PHY register. */