skfddi.c

h内核

	return (0);

fail:
	if (bp->SharedMemAddr) {
		pci_free_consistent(&bp->pdev,
				    bp->SharedMemSize,
				    bp->SharedMemAddr,
				    bp->SharedMemDMA);
		bp->SharedMemAddr = NULL;
	}
	if (bp->LocalRxBuffer) {
		pci_free_consistent(&bp->pdev, MAX_FRAME_SIZE,
				    bp->LocalRxBuffer, bp->LocalRxBufferDMA);
		bp->LocalRxBuffer = NULL;
	}
	return err;
}				// skfp_driver_init


/*
 * =============
 * = skfp_open =
 * =============
 *   
 * Overview:
 *   Opens the adapter
 *  
 * Returns:
 *   Condition code
 *       
 * Arguments:
 *   dev - pointer to device information
 *
 * Functional Description:
 *   This function brings the adapter to an operational state.
 *
 * Return Codes:
 *   0           - Adapter was successfully opened
 *   -EAGAIN - Could not register IRQ
 */
static int skfp_open(struct net_device *dev)
{
	struct s_smc *smc = netdev_priv(dev);
	int err;

	PRINTK(KERN_INFO "entering skfp_open\n");
	/* Register IRQ - support shared interrupts by passing device ptr */
	err = request_irq(dev->irq, (void *) skfp_interrupt, SA_SHIRQ,
			  dev->name, dev);
	if (err)
		return err;

	/*
	 * Set current address to factory MAC address
	 *
	 * Note: We've already done this step in skfp_driver_init.
	 *       However, it's possible that a user has set a node
	 *               address override, then closed and reopened the
	 *               adapter.  Unless we reset the device address field
	 *               now, we'll continue to use the existing modified
	 *               address.
	 */
	read_address(smc, NULL);
	memcpy(dev->dev_addr, smc->hw.fddi_canon_addr.a, 6);

	init_smt(smc, NULL);
	smt_online(smc, 1);
	STI_FBI();

	/* Clear local multicast address tables */
	mac_clear_multicast(smc);

	/* Disable promiscuous filter settings */
	mac_drv_rx_mode(smc, RX_DISABLE_PROMISC);

	netif_start_queue(dev);
	return (0);
}				// skfp_open


/*
 * ==============
 * = skfp_close =
 * ==============
 *   
 * Overview:
 *   Closes the device/module.
 *  
 * Returns:
 *   Condition code
 *       
 * Arguments:
 *   dev - pointer to device information
 *
 * Functional Description:
 *   This routine closes the adapter and brings it to a safe state.
 *   The interrupt service routine is deregistered with the OS.
 *   The adapter can be opened again with another call to skfp_open().
 *
 * Return Codes:
 *   Always return 0.
 *
 * Assumptions:
 *   No further requests for this adapter are made after this routine is
 *   called.  skfp_open() can be called to reset and reinitialize the
 *   adapter.
 */
static int skfp_close(struct net_device *dev)
{
	struct s_smc *smc = netdev_priv(dev);
	skfddi_priv *bp = &smc->os;

	CLI_FBI();
	smt_reset_defaults(smc, 1);
	card_stop(smc);
	mac_drv_clear_tx_queue(smc);
	mac_drv_clear_rx_queue(smc);

	netif_stop_queue(dev);
	/* Deregister (free) IRQ */
	free_irq(dev->irq, dev);

	skb_queue_purge(&bp->SendSkbQueue);
	bp->QueueSkb = MAX_TX_QUEUE_LEN;

	return (0);
}				// skfp_close


/*
 * ==================
 * = skfp_interrupt =
 * ==================
 *   
 * Overview:
 *   Interrupt processing routine
 *  
 * Returns:
 *   None
 *       
 * Arguments:
 *   irq        - interrupt vector
 *   dev_id     - pointer to device information
 *       regs   - pointer to registers structure
 *
 * Functional Description:
 *   This routine calls the interrupt processing routine for this adapter.  It
 *   disables and reenables adapter interrupts, as appropriate.  We can support
 *   shared interrupts since the incoming dev_id pointer provides our device
 *   structure context. All the real work is done in the hardware module.
 *
 * Return Codes:
 *   None
 *
 * Assumptions:
 *   The interrupt acknowledgement at the hardware level (eg. ACKing the PIC
 *   on Intel-based systems) is done by the operating system outside this
 *   routine.
 *
 *       System interrupts are enabled through this call.
 *
 * Side Effects:
 *   Interrupts are disabled, then reenabled at the adapter.
 */

irqreturn_t skfp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	struct net_device *dev = (struct net_device *) dev_id;
	struct s_smc *smc;	/* private board structure pointer */
	skfddi_priv *bp;

	if (dev == NULL) {
		printk("%s: irq %d for unknown device\n", dev->name, irq);
		return IRQ_NONE;
	}

	smc = netdev_priv(dev);
	bp = &smc->os;

	// IRQs enabled or disabled ?
	if (inpd(ADDR(B0_IMSK)) == 0) {
		// IRQs are disabled: must be shared interrupt
		return IRQ_NONE;
	}
	// Note: At this point, IRQs are enabled.
	if ((inpd(ISR_A) & smc->hw.is_imask) == 0) {	// IRQ?
		// Adapter did not issue an IRQ: must be shared interrupt
		return IRQ_NONE;
	}
	CLI_FBI();		// Disable IRQs from our adapter.
	spin_lock(&bp->DriverLock);

	// Call interrupt handler in hardware module (HWM).
	fddi_isr(smc);

	if (smc->os.ResetRequested) {
		ResetAdapter(smc);
		smc->os.ResetRequested = FALSE;
	}
	spin_unlock(&bp->DriverLock);
	STI_FBI();		// Enable IRQs from our adapter.

	return IRQ_HANDLED;
}				// skfp_interrupt


/*
 * ======================
 * = skfp_ctl_get_stats =
 * ======================
 *   
 * Overview:
 *   Get statistics for FDDI adapter
 *  
 * Returns:
 *   Pointer to FDDI statistics structure
 *       
 * Arguments:
 *   dev - pointer to device information
 *
 * Functional Description:
 *   Gets current MIB objects from adapter, then
 *   returns FDDI statistics structure as defined
 *   in if_fddi.h.
 *
 *   Note: Since the FDDI statistics structure is
 *   still new and the device structure doesn't
 *   have an FDDI-specific get statistics handler,
 *   we'll return the FDDI statistics structure as
 *   a pointer to an Ethernet statistics structure.
 *   That way, at least the first part of the statistics
 *   structure can be decoded properly.
 *   We'll have to pay attention to this routine as the
 *   device structure becomes more mature and LAN media
 *   independent.
 *
 */
struct net_device_stats *skfp_ctl_get_stats(struct net_device *dev)
{
	struct s_smc *bp = netdev_priv(dev);

	/* Fill the bp->stats structure with driver-maintained counters */

	bp->os.MacStat.port_bs_flag[0] = 0x1234;
	bp->os.MacStat.port_bs_flag[1] = 0x5678;
// goos: need to fill out fddi statistic
#if 0
	/* Get FDDI SMT MIB objects */

/* Fill the bp->stats structure with the SMT MIB object values */

	memcpy(bp->stats.smt_station_id, &bp->cmd_rsp_virt->smt_mib_get.smt_station_id, sizeof(bp->cmd_rsp_virt->smt_mib_get.smt_station_id));
	bp->stats.smt_op_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_op_version_id;
	bp->stats.smt_hi_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_hi_version_id;
	bp->stats.smt_lo_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_lo_version_id;
	memcpy(bp->stats.smt_user_data, &bp->cmd_rsp_virt->smt_mib_get.smt_user_data, sizeof(bp->cmd_rsp_virt->smt_mib_get.smt_user_data));
	bp->stats.smt_mib_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_mib_version_id;
	bp->stats.smt_mac_cts = bp->cmd_rsp_virt->smt_mib_get.smt_mac_ct;
	bp->stats.smt_non_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_non_master_ct;
	bp->stats.smt_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_master_ct;
	bp->stats.smt_available_paths = bp->cmd_rsp_virt->smt_mib_get.smt_available_paths;
	bp->stats.smt_config_capabilities = bp->cmd_rsp_virt->smt_mib_get.smt_config_capabilities;
	bp->stats.smt_config_policy = bp->cmd_rsp_virt->smt_mib_get.smt_config_policy;
	bp->stats.smt_connection_policy = bp->cmd_rsp_virt->smt_mib_get.smt_connection_policy;
	bp->stats.smt_t_notify = bp->cmd_rsp_virt->smt_mib_get.smt_t_notify;
	bp->stats.smt_stat_rpt_policy = bp->cmd_rsp_virt->smt_mib_get.smt_stat_rpt_policy;
	bp->stats.smt_trace_max_expiration = bp->cmd_rsp_virt->smt_mib_get.smt_trace_max_expiration;
	bp->stats.smt_bypass_present = bp->cmd_rsp_virt->smt_mib_get.smt_bypass_present;
	bp->stats.smt_ecm_state = bp->cmd_rsp_virt->smt_mib_get.smt_ecm_state;
	bp->stats.smt_cf_state = bp->cmd_rsp_virt->smt_mib_get.smt_cf_state;
	bp->stats.smt_remote_disconnect_flag = bp->cmd_rsp_virt->smt_mib_get.smt_remote_disconnect_flag;
	bp->stats.smt_station_status = bp->cmd_rsp_virt->smt_mib_get.smt_station_status;
	bp->stats.smt_peer_wrap_flag = bp->cmd_rsp_virt->smt_mib_get.smt_peer_wrap_flag;
	bp->stats.smt_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_msg_time_stamp.ls;
	bp->stats.smt_transition_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_transition_time_stamp.ls;
	bp->stats.mac_frame_status_functions = bp->cmd_rsp_virt->smt_mib_get.mac_frame_status_functions;
	bp->stats.mac_t_max_capability = bp->cmd_rsp_virt->smt_mib_get.mac_t_max_capability;
	bp->stats.mac_tvx_capability = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_capability;
	bp->stats.mac_available_paths = bp->cmd_rsp_virt->smt_mib_get.mac_available_paths;
	bp->stats.mac_current_path = bp->cmd_rsp_virt->smt_mib_get.mac_current_path;
	memcpy(bp->stats.mac_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_upstream_nbr, FDDI_K_ALEN);
	memcpy(bp->stats.mac_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_downstream_nbr, FDDI_K_ALEN);
	memcpy(bp->stats.mac_old_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_upstream_nbr, FDDI_K_ALEN);
	memcpy(bp->stats.mac_old_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_downstream_nbr, FDDI_K_ALEN);
	bp->stats.mac_dup_address_test = bp->cmd_rsp_virt->smt_mib_get.mac_dup_address_test;
	bp->stats.mac_requested_paths = bp->cmd_rsp_virt->smt_mib_get.mac_requested_paths;
	bp->stats.mac_downstream_port_type = bp->cmd_rsp_virt->smt_mib_get.mac_downstream_port_type;
	memcpy(bp->stats.mac_smt_address, &bp->cmd_rsp_virt->smt_mib_get.mac_smt_address, FDDI_K_ALEN);
	bp->stats.mac_t_req = bp->cmd_rsp_virt->smt_mib_get.mac_t_req;
	bp->stats.mac_t_neg = bp->cmd_rsp_virt->smt_mib_get.mac_t_neg;
	bp->stats.mac_t_max = bp->cmd_rsp_virt->smt_mib_get.mac_t_max;
	bp->stats.mac_tvx_value = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_value;
	bp->stats.mac_frame_error_threshold = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_threshold;
	bp->stats.mac_frame_error_ratio = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_ratio;
	bp->stats.mac_rmt_state = bp->cmd_rsp_virt->smt_mib_get.mac_rmt_state;
	bp->stats.mac_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_da_flag;
	bp->stats.mac_una_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_unda_flag;
	bp->stats.mac_frame_error_flag = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_flag;
	bp->stats.mac_ma_unitdata_available = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_available;
	bp->stats.mac_hardware_present = bp->cmd_rsp_virt->smt_mib_get.mac_hardware_present;
	bp->stats.mac_ma_unitdata_enable = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_enable;
	bp->stats.path_tvx_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_tvx_lower_bound;
	bp->stats.path_t_max_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_t_max_lower_bound;
	bp->stats.path_max_t_req = bp->cmd_rsp_virt->smt_mib_get.path_max_t_req;
	memcpy(bp->stats.path_configuration, &bp->cmd_rsp_virt->smt_mib_get.path_configuration, sizeof(bp->cmd_rsp_virt->smt_mib_get.path_configuration));
	bp->stats.port_my_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[0];
	bp->stats.port_my_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[1];
	bp->stats.port_neighbor_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[0];
	bp->stats.port_neighbor_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[1];
	bp->stats.port_connection_policies[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[0];
	bp->stats.port_connection_policies[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[1];
	bp->stats.port_mac_indicated[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[0];
	bp->stats.port_mac_indicated[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[1];
	bp->stats.port_current_path[0] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[0];
	bp->stats.port_current_path[1] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[1];
	memcpy(&bp->stats.port_requested_paths[0 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[0], 3);
	memcpy(&bp->stats.port_requested_paths[1 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[1], 3);
	bp->stats.port_mac_placement[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[0];
	bp->stats.port_mac_placement[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[1];
	bp->stats.port_available_paths[0] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[0];
	bp->stats.port_available_paths[1] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[1];
	bp->stats.port_pmd_class[0] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[0];
	bp->stats.port_pmd_class[1] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[1];
	bp->stats.port_connection_capabilities[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[0];
	bp->stats.port_connection_capabilities[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[1];
	bp->stats.port_bs_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[0];
	bp->stats.port_bs_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[1];
	bp->stats.port_ler_estimate[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[0];
	bp->stats.port_ler_estimate[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[1];
	bp->stats.port_ler_cutoff[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[0];
	bp->stats.port_ler_cutoff[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[1];
	bp->stats.port_ler_alarm[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[0];
	bp->stats.port_ler_alarm[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[1];
	bp->stats.port_connect_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[0];
	bp->stats.port_connect_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[1];
	bp->stats.port_pcm_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[0];
	bp->stats.port_pcm_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[1];
	bp->stats.port_pc_withhold[0] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[0];
	bp->stats.port_pc_withhold[1] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[1];
	bp->stats.port_ler_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[0];
	bp->stats.port_ler_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[1];
	bp->stats.port_hardware_present[0] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[0];
	bp->stats.port_hardware_present[1] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[1];


	/* Fill the bp->stats structure with the FDDI counter values */

	bp->stats.mac_frame_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.frame_cnt.ls;
	bp->stats.mac_copied_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.copied_cnt.ls;
	bp->stats.mac_transmit_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.transmit_cnt.ls;
	bp->stats.mac_error_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.error_cnt.ls;
	bp->stats.mac_lost_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.lost_cnt.ls;
	bp->stats.port_lct_fail_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[0].ls;
	bp->stats.port_lct_fail_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[1].ls;
	bp->stats.port_lem_reject_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[0].ls;
	bp->stats.port_lem_reject_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[1].ls;
	bp->stats.port_lem_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[0].ls;
	bp->stats.port_lem_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[1].ls;

#endif
	return ((struct net_device_stats *) &bp->os.MacStat);
}				// ctl_get_stat


/*
 * ==============================
 * = skfp_ctl_set_multicast_list =
 * ==============================
 *   
 * Overview:
 *   Enable/Disable LLC frame promiscuous mode reception
 *   on the adapter and/or update multicast address table.
 *  
 * Returns:
 *   None
 *       
 * Arguments:
 *   dev - pointer to device information
 *
 * Functional Description:
 *   This function acquires the driver lock and only calls
 *   skfp_ctl_set_multicast_list_wo_lock then.
 *   This routine follows a fairly simple algorithm for setting the
 *   adapter filters and CAM:
 *
 *      if IFF_PROMISC flag is set
 *              enable promiscuous mode
 *      else
 *              disable promiscuous mode
 *              if number of multicast addresses <= max. multicast number
 *                      add mc addresses to adapter table
 *              else
 *                      enable promiscuous mode
 *              update adapter filters
 *
 * Assumptions:
 *   Multicast addresses are presented in canonical (LSB) format.
 *
 * Side Effects:
 *   On-board adapter filters are updated.
 */
static void skfp_ctl_set_multicast_list(struct net_device *dev)
{
	struct s_smc *smc = netdev_priv(dev);
	skfddi_priv *bp = &smc->os;
	unsigned long Flags;

	spin_lock_irqsave(&bp->DriverLock, Flags);
	skfp_ctl_set_multicast_list_wo_lock(dev);
	spin_unlock_irqrestore(&bp->DriverLock, Flags);
	return;
}				// skfp_ctl_set_multicast_list



static void skfp_ctl_set_multicast_list_wo_lock(struct net_device *dev)
{
	struct s_smc *smc = netdev_priv(dev);
	struct dev_mc_list *dmi;	/* ptr to multicast addr entry */
	int i;

	/* Enable promiscuous mode, if necessary */
	if (dev->flags & IFF_PROMISC) {
		mac_drv_rx_mode(smc, RX_ENABLE_PROMISC);
		PRINTK(KERN_INFO "PROMISCUOUS MODE ENABLED\n");
	}
	/* Else, update multicast address table */
	else {
		mac_drv_rx_mode(smc, RX_DISABLE_PROMISC);
		PRINTK(KERN_INFO "PROMISCUOUS MODE DISABLED\n");

		// Reset all MC addresses
		mac_clear_multicast(smc);
		mac_drv_rx_mode(smc, RX_DISABLE_ALLMULTI);

		if (dev->flags & IFF_ALLMULTI) {
			mac_drv_rx_mode(smc, RX_ENABLE_ALLMULTI);
			PRINTK(KERN_INFO "ENABLE ALL MC ADDRESSES\n");
		} else if (dev->mc_count > 0) {
			if (dev->mc_count <= FPMAX_MULTICAST) {
				/* use exact filtering */

				// point to first multicast addr
				dmi = dev->mc_list;

				for (i = 0; i < dev->mc_count; i++) {
					mac_add_multicast(smc, 
							  (struct fddi_addr *)dmi->dmi_addr, 
							  1);

					PRINTK(KERN_INFO "ENABLE MC ADDRESS:");