netxen_nic_main.c

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/*
 * Copyright (C) 2003 - 2006 NetXen, Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.
 *
 * Contact Information:
 *    [e-mail]
 * NetXen,
 * 3965 Freedom Circle, Fourth floor,
 * Santa Clara, CA 95054
 *
 *
 *  Main source file for NetXen NIC Driver on Linux
 *
 */

#include <linux/vmalloc.h>
#include <linux/highmem.h>
#include "netxen_nic_hw.h"

#include "netxen_nic.h"
#include "netxen_nic_phan_reg.h"

#include <linux/dma-mapping.h>
#include <net/ip.h>

MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);

char netxen_nic_driver_name[] = "netxen_nic";
static char netxen_nic_driver_string[] = "NetXen Network Driver version "
    NETXEN_NIC_LINUX_VERSIONID;

#define NETXEN_NETDEV_WEIGHT 120
#define NETXEN_ADAPTER_UP_MAGIC 777
#define NETXEN_NIC_PEG_TUNE 0

/* Local functions to NetXen NIC driver */
static int __devinit netxen_nic_probe(struct pci_dev *pdev,
				      const struct pci_device_id *ent);
static void __devexit netxen_nic_remove(struct pci_dev *pdev);
static int netxen_nic_open(struct net_device *netdev);
static int netxen_nic_close(struct net_device *netdev);
static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
static void netxen_tx_timeout(struct net_device *netdev);
static void netxen_tx_timeout_task(struct work_struct *work);
static void netxen_watchdog(unsigned long);
static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
static int netxen_nic_poll(struct napi_struct *napi, int budget);
#ifdef CONFIG_NET_POLL_CONTROLLER
static void netxen_nic_poll_controller(struct net_device *netdev);
#endif
static irqreturn_t netxen_intr(int irq, void *data);

int physical_port[] = {0, 1, 2, 3};

/*  PCI Device ID Table  */
static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
	{PCI_DEVICE(0x4040, 0x0001)},
	{PCI_DEVICE(0x4040, 0x0002)},
	{PCI_DEVICE(0x4040, 0x0003)},
	{PCI_DEVICE(0x4040, 0x0004)},
	{PCI_DEVICE(0x4040, 0x0005)},
	{PCI_DEVICE(0x4040, 0x0024)},
	{PCI_DEVICE(0x4040, 0x0025)},
	{0,}
};

MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);

struct workqueue_struct *netxen_workq;
static void netxen_watchdog(unsigned long);

static inline void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
							uint32_t crb_producer)
{
	switch (adapter->portnum) {
		case 0:
			writel(crb_producer, NETXEN_CRB_NORMALIZE
					(adapter, CRB_CMD_PRODUCER_OFFSET));
			return;
		case 1:
			writel(crb_producer, NETXEN_CRB_NORMALIZE
					(adapter, CRB_CMD_PRODUCER_OFFSET_1));
			return;
		case 2:
			writel(crb_producer, NETXEN_CRB_NORMALIZE
					(adapter, CRB_CMD_PRODUCER_OFFSET_2));
			return;
		case 3:
			writel(crb_producer, NETXEN_CRB_NORMALIZE
					(adapter, CRB_CMD_PRODUCER_OFFSET_3));
			return;
		default:
			printk(KERN_WARNING "We tried to update "
					"CRB_CMD_PRODUCER_OFFSET for invalid "
					"PCI function id %d\n",
					adapter->portnum);
			return;
	}
}

static inline void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
							u32 crb_consumer)
{
	switch (adapter->portnum) {
		case 0:
			writel(crb_consumer, NETXEN_CRB_NORMALIZE
				(adapter, CRB_CMD_CONSUMER_OFFSET));
			return;
		case 1:
			writel(crb_consumer, NETXEN_CRB_NORMALIZE
				(adapter, CRB_CMD_CONSUMER_OFFSET_1));
			return;
		case 2:
			writel(crb_consumer, NETXEN_CRB_NORMALIZE
				(adapter, CRB_CMD_CONSUMER_OFFSET_2));
			return;
		case 3:
			writel(crb_consumer, NETXEN_CRB_NORMALIZE
				(adapter, CRB_CMD_CONSUMER_OFFSET_3));
			return;
		default:
			printk(KERN_WARNING "We tried to update "
					"CRB_CMD_PRODUCER_OFFSET for invalid "
					"PCI function id %d\n",
					adapter->portnum);
			return;
	}
}

#define	ADAPTER_LIST_SIZE 12
int netxen_cards_found;

static void netxen_nic_disable_int(struct netxen_adapter *adapter)
{
	uint32_t	mask = 0x7ff;
	int retries = 32;

	DPRINTK(1, INFO, "Entered ISR Disable \n");

	switch (adapter->portnum) {
	case 0:
		writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
		break;
	case 1:
		writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
		break;
	case 2:
		writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
		break;
	case 3:
		writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
		break;
	}

	if (adapter->intr_scheme != -1 &&
	    adapter->intr_scheme != INTR_SCHEME_PERPORT)
		writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));

	/* Window = 0 or 1 */
	if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
		do {
			writel(0xffffffff,
			       PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
			mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
			if (!(mask & 0x80))
				break;
			udelay(10);
		} while (--retries);

		if (!retries) {
			printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
					netxen_nic_driver_name);
		}
	}

	DPRINTK(1, INFO, "Done with Disable Int\n");
}

static void netxen_nic_enable_int(struct netxen_adapter *adapter)
{
	u32 mask;

	DPRINTK(1, INFO, "Entered ISR Enable \n");

	if (adapter->intr_scheme != -1 &&
		adapter->intr_scheme != INTR_SCHEME_PERPORT) {
		switch (adapter->ahw.board_type) {
		case NETXEN_NIC_GBE:
			mask  =  0x77b;
			break;
		case NETXEN_NIC_XGBE:
			mask  =  0x77f;
			break;
		default:
			mask  =  0x7ff;
			break;
		}

		writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
	}

	switch (adapter->portnum) {
	case 0:
		writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
		break;
	case 1:
		writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
		break;
	case 2:
		writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
		break;
	case 3:
		writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
		break;
	}

	if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
		mask = 0xbff;
		if (adapter->intr_scheme != -1 &&
			adapter->intr_scheme != INTR_SCHEME_PERPORT) {
			writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
		}
		writel(mask,
		       PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
	}

	DPRINTK(1, INFO, "Done with enable Int\n");
}

/*
 * netxen_nic_probe()
 *
 * The Linux system will invoke this after identifying the vendor ID and
 * device Id in the pci_tbl supported by this module.
 *
 * A quad port card has one operational PCI config space, (function 0),
 * which is used to access all four ports.
 *
 * This routine will initialize the adapter, and setup the global parameters
 * along with the port's specific structure.
 */
static int __devinit
netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct net_device *netdev = NULL;
	struct netxen_adapter *adapter = NULL;
	void __iomem *mem_ptr0 = NULL;
	void __iomem *mem_ptr1 = NULL;
	void __iomem *mem_ptr2 = NULL;
	unsigned long first_page_group_end;
	unsigned long first_page_group_start;


	u8 __iomem *db_ptr = NULL;
	unsigned long mem_base, mem_len, db_base, db_len;
	int pci_using_dac, i = 0, err;
	int ring;
	struct netxen_recv_context *recv_ctx = NULL;
	struct netxen_rcv_desc_ctx *rcv_desc = NULL;
	struct netxen_cmd_buffer *cmd_buf_arr = NULL;
	u64 mac_addr[FLASH_NUM_PORTS + 1];
	int valid_mac = 0;
	u32 val;
	int pci_func_id = PCI_FUNC(pdev->devfn);
	DECLARE_MAC_BUF(mac);

	printk(KERN_INFO "%s \n", netxen_nic_driver_string);

	if (pdev->class != 0x020000) {
		printk(KERN_ERR"NetXen function %d, class %x will not"
				"be enabled.\n",pci_func_id, pdev->class);
		return -ENODEV;
	}
	if ((err = pci_enable_device(pdev)))
		return err;
	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
		err = -ENODEV;
		goto err_out_disable_pdev;
	}

	if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
		goto err_out_disable_pdev;

	pci_set_master(pdev);
	if (pdev->revision == NX_P2_C1 &&
	    (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
	    (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
		pci_using_dac = 1;
	} else {
		if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
		    (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
			goto err_out_free_res;

		pci_using_dac = 0;
	}


	netdev = alloc_etherdev(sizeof(struct netxen_adapter));
	if(!netdev) {
		printk(KERN_ERR"%s: Failed to allocate memory for the "
				"device block.Check system memory resource"
				" usage.\n", netxen_nic_driver_name);
		goto err_out_free_res;
	}

	SET_NETDEV_DEV(netdev, &pdev->dev);

	adapter = netdev->priv;

	adapter->ahw.pdev = pdev;
	adapter->ahw.pci_func  = pci_func_id;
	spin_lock_init(&adapter->tx_lock);

	/* remap phys address */
	mem_base = pci_resource_start(pdev, 0);	/* 0 is for BAR 0 */
	mem_len = pci_resource_len(pdev, 0);

	/* 128 Meg of memory */
	if (mem_len == NETXEN_PCI_128MB_SIZE) {
		mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
		mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
				SECOND_PAGE_GROUP_SIZE);
		mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
				THIRD_PAGE_GROUP_SIZE);
		first_page_group_start = FIRST_PAGE_GROUP_START;
		first_page_group_end   = FIRST_PAGE_GROUP_END;
	} else if (mem_len == NETXEN_PCI_32MB_SIZE) {
		mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
		mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
			SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
		first_page_group_start = 0;
		first_page_group_end   = 0;
	} else {
		err = -EIO; 
		goto err_out_free_netdev;
	}

	if (((mem_ptr0 == 0UL) && (mem_len == NETXEN_PCI_128MB_SIZE)) ||
			(mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) {
		DPRINTK(ERR,
			"Cannot remap adapter memory aborting.:"
			"0 -> %p, 1 -> %p, 2 -> %p\n",
			mem_ptr0, mem_ptr1, mem_ptr2);

		err = -EIO;
		goto err_out_iounmap;
	}
	db_base = pci_resource_start(pdev, 4);	/* doorbell is on bar 4 */
	db_len = pci_resource_len(pdev, 4);

	if (db_len == 0) {
		printk(KERN_ERR "%s: doorbell is disabled\n",
		       netxen_nic_driver_name);
		err = -EIO;
		goto err_out_iounmap;
	}
	DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
		db_len);

	db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
	if (!db_ptr) {
		printk(KERN_ERR "%s: Failed to allocate doorbell map.",
		       netxen_nic_driver_name);
		err = -EIO;
		goto err_out_iounmap;
	}
	DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);

	adapter->ahw.pci_base0 = mem_ptr0;
	adapter->ahw.first_page_group_start = first_page_group_start;
	adapter->ahw.first_page_group_end   = first_page_group_end;
	adapter->ahw.pci_base1 = mem_ptr1;
	adapter->ahw.pci_base2 = mem_ptr2;
	adapter->ahw.db_base = db_ptr;
	adapter->ahw.db_len = db_len;

	adapter->netdev  = netdev;
	adapter->pdev    = pdev;

	netif_napi_add(netdev, &adapter->napi,
		       netxen_nic_poll, NETXEN_NETDEV_WEIGHT);

	/* this will be read from FW later */
	adapter->intr_scheme = -1;

	/* This will be reset for mezz cards  */
	adapter->portnum = pci_func_id;
	adapter->status   &= ~NETXEN_NETDEV_STATUS;
	adapter->rx_csum = 1;

	netdev->open		   = netxen_nic_open;
	netdev->stop		   = netxen_nic_close;
	netdev->hard_start_xmit    = netxen_nic_xmit_frame;
	netdev->get_stats	   = netxen_nic_get_stats;	
	netdev->set_multicast_list = netxen_nic_set_multi;
	netdev->set_mac_address    = netxen_nic_set_mac;
	netdev->change_mtu	   = netxen_nic_change_mtu;
	netdev->tx_timeout	   = netxen_tx_timeout;
	netdev->watchdog_timeo     = HZ;

	netxen_nic_change_mtu(netdev, netdev->mtu);

	SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
#ifdef CONFIG_NET_POLL_CONTROLLER
	netdev->poll_controller = netxen_nic_poll_controller;
#endif
	/* ScatterGather support */
	netdev->features = NETIF_F_SG;
	netdev->features |= NETIF_F_IP_CSUM;
	netdev->features |= NETIF_F_TSO;

	if (pci_using_dac)
		netdev->features |= NETIF_F_HIGHDMA;

	if (pci_enable_msi(pdev))
		adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
	else
		adapter->flags |= NETXEN_NIC_MSI_ENABLED;

	netdev->irq = pdev->irq;
	INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);

	/*
	 * Set the CRB window to invalid. If any register in window 0 is
	 * accessed it should set the window to 0 and then reset it to 1.
	 */
	adapter->curr_window = 255;

	/* initialize the adapter */
	netxen_initialize_adapter_hw(adapter);

	/*
	 *  Adapter in our case is quad port so initialize it before
	 *  initializing the ports