netxen_nic_main.c 44.6 KB
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/*
 * Copyright (C) 2003 - 2006 NetXen, Inc.
 * All rights reserved.
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 *
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 * 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.
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 *
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 * 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.
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 *
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 * 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.
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 *
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 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.
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 *
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 * Contact Information:
 *    info@netxen.com
 * NetXen,
 * 3965 Freedom Circle, Fourth floor,
 * Santa Clara, CA 95054
 *
 *
 *  Main source file for NetXen NIC Driver on Linux
 *
 */

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

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

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#include <linux/dma-mapping.h>
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#include <net/ip.h>
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MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);

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

/* Default to restricted 1G auto-neg mode */
static int wol_port_mode = 5;

static int use_msi = 1;

static int use_msi_x = 1;

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/* Local functions to NetXen NIC driver */
static int __devinit netxen_nic_probe(struct pci_dev *pdev,
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		const struct pci_device_id *ent);
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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);
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static void netxen_tx_timeout_task(struct work_struct *work);
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static void netxen_watchdog(unsigned long);
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static int netxen_nic_poll(struct napi_struct *napi, int budget);
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#ifdef CONFIG_NET_POLL_CONTROLLER
static void netxen_nic_poll_controller(struct net_device *netdev);
#endif
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static irqreturn_t netxen_intr(int irq, void *data);
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static irqreturn_t netxen_msi_intr(int irq, void *data);
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/*  PCI Device ID Table  */
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#define ENTRY(device) \
	{PCI_DEVICE(0x4040, (device)), \
	.class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}

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static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
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	ENTRY(0x0001),
	ENTRY(0x0002),
	ENTRY(0x0003),
	ENTRY(0x0004),
	ENTRY(0x0005),
	ENTRY(0x0024),
	ENTRY(0x0025),
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	ENTRY(0x0100),
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	{0,}
};

MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);

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/*
 * In netxen_nic_down(), we must wait for any pending callback requests into
 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
 * reenabled right after it is deleted in netxen_nic_down().
 * FLUSH_SCHEDULED_WORK()  does this synchronization.
 *
 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
 * linkwatch_event() to be executed which also attempts to acquire the rtnl
 * lock thus causing a deadlock.
 */

static struct workqueue_struct *netxen_workq;
#define SCHEDULE_WORK(tp)	queue_work(netxen_workq, tp)
#define FLUSH_SCHEDULED_WORK()	flush_workqueue(netxen_workq)

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static void netxen_watchdog(unsigned long);

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static uint32_t crb_cmd_producer[4] = {
	CRB_CMD_PRODUCER_OFFSET, CRB_CMD_PRODUCER_OFFSET_1,
	CRB_CMD_PRODUCER_OFFSET_2, CRB_CMD_PRODUCER_OFFSET_3
};

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void
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netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
		uint32_t crb_producer)
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{
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	adapter->pci_write_normalize(adapter,
			adapter->crb_addr_cmd_producer, crb_producer);
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}

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static uint32_t crb_cmd_consumer[4] = {
	CRB_CMD_CONSUMER_OFFSET, CRB_CMD_CONSUMER_OFFSET_1,
	CRB_CMD_CONSUMER_OFFSET_2, CRB_CMD_CONSUMER_OFFSET_3
};

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static inline void
netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
		u32 crb_consumer)
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{
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	adapter->pci_write_normalize(adapter,
			adapter->crb_addr_cmd_consumer, crb_consumer);
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}

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static uint32_t msi_tgt_status[8] = {
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	ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
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	ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3,
	ISR_INT_TARGET_STATUS_F4, ISR_INT_TARGET_STATUS_F5,
	ISR_INT_TARGET_STATUS_F6, ISR_INT_TARGET_STATUS_F7
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};

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static struct netxen_legacy_intr_set legacy_intr[] = NX_LEGACY_INTR_CONFIG;

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static void netxen_nic_disable_int(struct netxen_adapter *adapter)
{
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	u32 mask = 0x7ff;
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	int retries = 32;
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	int pci_fn = adapter->ahw.pci_func;
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	if (adapter->msi_mode != MSI_MODE_MULTIFUNC)
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		adapter->pci_write_normalize(adapter,
				adapter->crb_intr_mask, 0);
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	if (adapter->intr_scheme != -1 &&
	    adapter->intr_scheme != INTR_SCHEME_PERPORT)
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		adapter->pci_write_immediate(adapter, ISR_INT_MASK, mask);
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	if (!NETXEN_IS_MSI_FAMILY(adapter)) {
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		do {
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			adapter->pci_write_immediate(adapter,
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					adapter->legacy_intr.tgt_status_reg,
					0xffffffff);
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			mask = adapter->pci_read_immediate(adapter,
					ISR_INT_VECTOR);
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			if (!(mask & 0x80))
				break;
			udelay(10);
		} while (--retries);

		if (!retries) {
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			printk(KERN_NOTICE "%s: Failed to disable interrupt\n",
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					netxen_nic_driver_name);
		}
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	} else {
		if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
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			adapter->pci_write_immediate(adapter,
					msi_tgt_status[pci_fn], 0xffffffff);
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		}
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	}
}

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

	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;
		}

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		adapter->pci_write_immediate(adapter, ISR_INT_MASK, mask);
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	}

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	adapter->pci_write_normalize(adapter, adapter->crb_intr_mask, 0x1);
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	if (!NETXEN_IS_MSI_FAMILY(adapter)) {
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		mask = 0xbff;
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		if (adapter->intr_scheme == INTR_SCHEME_PERPORT)
			adapter->pci_write_immediate(adapter,
				adapter->legacy_intr.tgt_mask_reg, mask);
		else
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			adapter->pci_write_normalize(adapter,
					CRB_INT_VECTOR, 0);
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	}
}

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static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
{
	struct pci_dev *pdev = adapter->pdev;
	int err;
	uint64_t mask;

#ifdef CONFIG_IA64
	adapter->dma_mask = DMA_32BIT_MASK;
#else
	if (revision_id >= NX_P3_B0) {
		/* should go to DMA_64BIT_MASK */
		adapter->dma_mask = DMA_39BIT_MASK;
		mask = DMA_39BIT_MASK;
	} else if (revision_id == NX_P3_A2) {
		adapter->dma_mask = DMA_39BIT_MASK;
		mask = DMA_39BIT_MASK;
	} else if (revision_id == NX_P2_C1) {
		adapter->dma_mask = DMA_35BIT_MASK;
		mask = DMA_35BIT_MASK;
	} else {
		adapter->dma_mask = DMA_32BIT_MASK;
		mask = DMA_32BIT_MASK;
		goto set_32_bit_mask;
	}

	/*
	 * Consistent DMA mask is set to 32 bit because it cannot be set to
	 * 35 bits. For P3 also leave it at 32 bits for now. Only the rings
	 * come off this pool.
	 */
	if (pci_set_dma_mask(pdev, mask) == 0 &&
		pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) == 0) {
		adapter->pci_using_dac = 1;
		return 0;
	}
#endif /* CONFIG_IA64 */

set_32_bit_mask:
	err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
	if (!err)
		err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
	if (err) {
		DPRINTK(ERR, "No usable DMA configuration, aborting:%d\n", err);
		return err;
	}

	adapter->pci_using_dac = 0;
	return 0;
}

static void netxen_check_options(struct netxen_adapter *adapter)
{
	switch (adapter->ahw.boardcfg.board_type) {
	case NETXEN_BRDTYPE_P3_HMEZ:
	case NETXEN_BRDTYPE_P3_XG_LOM:
	case NETXEN_BRDTYPE_P3_10G_CX4:
	case NETXEN_BRDTYPE_P3_10G_CX4_LP:
	case NETXEN_BRDTYPE_P3_IMEZ:
	case NETXEN_BRDTYPE_P3_10G_SFP_PLUS:
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	case NETXEN_BRDTYPE_P3_10G_SFP_QT:
	case NETXEN_BRDTYPE_P3_10G_SFP_CT:
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	case NETXEN_BRDTYPE_P3_10G_XFP:
	case NETXEN_BRDTYPE_P3_10000_BASE_T:
		adapter->msix_supported = !!use_msi_x;
		adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
		break;

	case NETXEN_BRDTYPE_P2_SB31_10G:
	case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
	case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
	case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
		adapter->msix_supported = 0;
		adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
		break;

	case NETXEN_BRDTYPE_P3_REF_QG:
	case NETXEN_BRDTYPE_P3_4_GB:
	case NETXEN_BRDTYPE_P3_4_GB_MM:
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		adapter->msix_supported = 0;
		adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
		break;

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	case NETXEN_BRDTYPE_P2_SB35_4G:
	case NETXEN_BRDTYPE_P2_SB31_2G:
		adapter->msix_supported = 0;
		adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
		break;

	default:
		adapter->msix_supported = 0;
		adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;

		printk(KERN_WARNING "Unknown board type(0x%x)\n",
				adapter->ahw.boardcfg.board_type);
		break;
	}

	adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
	adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
	adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;

	adapter->max_possible_rss_rings = 1;
	return;
}

static int
netxen_check_hw_init(struct netxen_adapter *adapter, int first_boot)
{
	int ret = 0;

	if (first_boot == 0x55555555) {
		/* This is the first boot after power up */

		/* PCI bus master workaround */
		adapter->hw_read_wx(adapter,
			NETXEN_PCIE_REG(0x4), &first_boot, 4);
		if (!(first_boot & 0x4)) {
			first_boot |= 0x4;
			adapter->hw_write_wx(adapter,
				NETXEN_PCIE_REG(0x4), &first_boot, 4);
			adapter->hw_read_wx(adapter,
				NETXEN_PCIE_REG(0x4), &first_boot, 4);
		}

		/* This is the first boot after power up */
		adapter->hw_read_wx(adapter,
			NETXEN_ROMUSB_GLB_SW_RESET, &first_boot, 4);
		if (first_boot != 0x80000f) {
			/* clear the register for future unloads/loads */
			adapter->pci_write_normalize(adapter,
					NETXEN_CAM_RAM(0x1fc), 0);
			ret = -1;
		}

		if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
			/* Start P2 boot loader */
			adapter->pci_write_normalize(adapter,
				NETXEN_CAM_RAM(0x1fc), NETXEN_BDINFO_MAGIC);
			adapter->pci_write_normalize(adapter,
					NETXEN_ROMUSB_GLB_PEGTUNE_DONE, 1);
		}
	}
	return ret;
}

static void netxen_set_port_mode(struct netxen_adapter *adapter)
{
	u32 val, data;

	val = adapter->ahw.boardcfg.board_type;
	if ((val == NETXEN_BRDTYPE_P3_HMEZ) ||
		(val == NETXEN_BRDTYPE_P3_XG_LOM)) {
		if (port_mode == NETXEN_PORT_MODE_802_3_AP) {
			data = NETXEN_PORT_MODE_802_3_AP;
			adapter->hw_write_wx(adapter,
				NETXEN_PORT_MODE_ADDR, &data, 4);
		} else if (port_mode == NETXEN_PORT_MODE_XG) {
			data = NETXEN_PORT_MODE_XG;
			adapter->hw_write_wx(adapter,
				NETXEN_PORT_MODE_ADDR, &data, 4);
		} else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_1G) {
			data = NETXEN_PORT_MODE_AUTO_NEG_1G;
			adapter->hw_write_wx(adapter,
				NETXEN_PORT_MODE_ADDR, &data, 4);
		} else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_XG) {
			data = NETXEN_PORT_MODE_AUTO_NEG_XG;
			adapter->hw_write_wx(adapter,
				NETXEN_PORT_MODE_ADDR, &data, 4);
		} else {
			data = NETXEN_PORT_MODE_AUTO_NEG;
			adapter->hw_write_wx(adapter,
				NETXEN_PORT_MODE_ADDR, &data, 4);
		}

		if ((wol_port_mode != NETXEN_PORT_MODE_802_3_AP) &&
			(wol_port_mode != NETXEN_PORT_MODE_XG) &&
			(wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_1G) &&
			(wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_XG)) {
			wol_port_mode = NETXEN_PORT_MODE_AUTO_NEG;
		}
		adapter->hw_write_wx(adapter, NETXEN_WOL_PORT_MODE,
			&wol_port_mode, 4);
	}
}

#define PCI_CAP_ID_GEN  0x10

static void netxen_pcie_strap_init(struct netxen_adapter *adapter)
{
	u32 pdevfuncsave;
	u32 c8c9value = 0;
	u32 chicken = 0;
	u32 control = 0;
	int i, pos;
	struct pci_dev *pdev;

	pdev = pci_get_device(0x1166, 0x0140, NULL);
	if (pdev) {
		pci_dev_put(pdev);
		adapter->hw_read_wx(adapter,
			NETXEN_PCIE_REG(PCIE_TGT_SPLIT_CHICKEN), &chicken, 4);
		chicken |= 0x4000;
		adapter->hw_write_wx(adapter,
			NETXEN_PCIE_REG(PCIE_TGT_SPLIT_CHICKEN), &chicken, 4);
	}

	pdev = adapter->pdev;

	adapter->hw_read_wx(adapter,
		NETXEN_PCIE_REG(PCIE_CHICKEN3), &chicken, 4);
	/* clear chicken3.25:24 */
	chicken &= 0xFCFFFFFF;
	/*
	 * if gen1 and B0, set F1020 - if gen 2, do nothing
	 * if gen2 set to F1000
	 */
	pos = pci_find_capability(pdev, PCI_CAP_ID_GEN);
	if (pos == 0xC0) {
		pci_read_config_dword(pdev, pos + 0x10, &control);
		if ((control & 0x000F0000) != 0x00020000) {
			/*  set chicken3.24 if gen1 */
			chicken |= 0x01000000;
		}
		printk(KERN_INFO "%s Gen2 strapping detected\n",
				netxen_nic_driver_name);
		c8c9value = 0xF1000;
	} else {
		/* set chicken3.24 if gen1 */
		chicken |= 0x01000000;
		printk(KERN_INFO "%s Gen1 strapping detected\n",
				netxen_nic_driver_name);
		if (adapter->ahw.revision_id == NX_P3_B0)
			c8c9value = 0xF1020;
		else
			c8c9value = 0;

	}
	adapter->hw_write_wx(adapter,
		NETXEN_PCIE_REG(PCIE_CHICKEN3), &chicken, 4);

	if (!c8c9value)
		return;

	pdevfuncsave = pdev->devfn;
	if (pdevfuncsave & 0x07)
		return;

	for (i = 0; i < 8; i++) {
		pci_read_config_dword(pdev, pos + 8, &control);
		pci_read_config_dword(pdev, pos + 8, &control);
		pci_write_config_dword(pdev, pos + 8, c8c9value);
		pdev->devfn++;
	}
	pdev->devfn = pdevfuncsave;
}

static void netxen_set_msix_bit(struct pci_dev *pdev, int enable)
{
	u32 control;
	int pos;

	pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
	if (pos) {
		pci_read_config_dword(pdev, pos, &control);
		if (enable)
			control |= PCI_MSIX_FLAGS_ENABLE;
		else
			control = 0;
		pci_write_config_dword(pdev, pos, control);
	}
}

static void netxen_init_msix_entries(struct netxen_adapter *adapter)
{
	int i;

	for (i = 0; i < MSIX_ENTRIES_PER_ADAPTER; i++)
		adapter->msix_entries[i].entry = i;
}

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static int
netxen_read_mac_addr(struct netxen_adapter *adapter)
{
	int i;
	unsigned char *p;
	__le64 mac_addr;
	DECLARE_MAC_BUF(mac);
	struct net_device *netdev = adapter->netdev;
	struct pci_dev *pdev = adapter->pdev;

	if (netxen_is_flash_supported(adapter) != 0)
		return -EIO;

	if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
		if (netxen_p3_get_mac_addr(adapter, &mac_addr) != 0)
			return -EIO;
	} else {
		if (netxen_get_flash_mac_addr(adapter, &mac_addr) != 0)
			return -EIO;
	}

	p = (unsigned char *)&mac_addr;
	for (i = 0; i < 6; i++)
		netdev->dev_addr[i] = *(p + 5 - i);

	memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);

	/* set station address */

	if (!is_valid_ether_addr(netdev->perm_addr)) {
		dev_warn(&pdev->dev, "Bad MAC address %s.\n",
				print_mac(mac, netdev->dev_addr));
	} else
		adapter->macaddr_set(adapter, netdev->dev_addr);

	return 0;
}

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/*
 * 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;
559 560 561
	void __iomem *mem_ptr0 = NULL;
	void __iomem *mem_ptr1 = NULL;
	void __iomem *mem_ptr2 = NULL;
562 563 564
	unsigned long first_page_group_end;
	unsigned long first_page_group_start;

565

A
Al Viro 已提交
566
	u8 __iomem *db_ptr = NULL;
567 568 569
	unsigned long mem_base, mem_len, db_base, db_len, pci_len0 = 0;
	int i = 0, err;
	int first_driver, first_boot;
570
	u32 val;
571
	int pci_func_id = PCI_FUNC(pdev->devfn);
572 573
	struct netxen_legacy_intr_set *legacy_intrp;
	uint8_t revision_id;
A
Amit S. Kale 已提交
574

575
	if (pci_func_id == 0)
576
		printk(KERN_INFO "%s\n", netxen_nic_driver_string);
577

578
	if (pdev->class != 0x020000) {
579
		printk(KERN_DEBUG "NetXen function %d, class %x will not "
580
				"be enabled.\n",pci_func_id, pdev->class);
581 582
		return -ENODEV;
	}
583

A
Amit S. Kale 已提交
584 585
	if ((err = pci_enable_device(pdev)))
		return err;
586

A
Amit S. Kale 已提交
587 588 589 590 591 592 593 594 595
	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);
596 597 598 599 600 601 602 603 604 605 606 607

	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;
608 609
	adapter->netdev  = netdev;
	adapter->pdev    = pdev;
610
	adapter->ahw.pci_func  = pci_func_id;
611 612 613 614 615 616 617 618

	revision_id = pdev->revision;
	adapter->ahw.revision_id = revision_id;

	err = nx_set_dma_mask(adapter, revision_id);
	if (err)
		goto err_out_free_netdev;

619 620 621
	rwlock_init(&adapter->adapter_lock);
	adapter->ahw.qdr_sn_window = -1;
	adapter->ahw.ddr_mn_window = -1;
622

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Amit S. Kale 已提交
623 624 625
	/* remap phys address */
	mem_base = pci_resource_start(pdev, 0);	/* 0 is for BAR 0 */
	mem_len = pci_resource_len(pdev, 0);
626 627 628 629 630 631 632 633 634 635 636
	pci_len0 = 0;

	adapter->hw_write_wx = netxen_nic_hw_write_wx_128M;
	adapter->hw_read_wx = netxen_nic_hw_read_wx_128M;
	adapter->pci_read_immediate = netxen_nic_pci_read_immediate_128M;
	adapter->pci_write_immediate = netxen_nic_pci_write_immediate_128M;
	adapter->pci_read_normalize = netxen_nic_pci_read_normalize_128M;
	adapter->pci_write_normalize = netxen_nic_pci_write_normalize_128M;
	adapter->pci_set_window = netxen_nic_pci_set_window_128M;
	adapter->pci_mem_read = netxen_nic_pci_mem_read_128M;
	adapter->pci_mem_write = netxen_nic_pci_mem_write_128M;
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Amit S. Kale 已提交
637 638

	/* 128 Meg of memory */
639 640 641 642 643 644 645 646 647 648 649 650 651 652
	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;
653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681
	} else if (mem_len == NETXEN_PCI_2MB_SIZE) {
		adapter->hw_write_wx = netxen_nic_hw_write_wx_2M;
		adapter->hw_read_wx = netxen_nic_hw_read_wx_2M;
		adapter->pci_read_immediate = netxen_nic_pci_read_immediate_2M;
		adapter->pci_write_immediate =
			netxen_nic_pci_write_immediate_2M;
		adapter->pci_read_normalize = netxen_nic_pci_read_normalize_2M;
		adapter->pci_write_normalize =
			netxen_nic_pci_write_normalize_2M;
		adapter->pci_set_window = netxen_nic_pci_set_window_2M;
		adapter->pci_mem_read = netxen_nic_pci_mem_read_2M;
		adapter->pci_mem_write = netxen_nic_pci_mem_write_2M;

		mem_ptr0 = ioremap(mem_base, mem_len);
		pci_len0 = mem_len;
		first_page_group_start = 0;
		first_page_group_end   = 0;

		adapter->ahw.ddr_mn_window = 0;
		adapter->ahw.qdr_sn_window = 0;

		adapter->ahw.mn_win_crb = 0x100000 + PCIX_MN_WINDOW +
			(pci_func_id * 0x20);
		adapter->ahw.ms_win_crb = 0x100000 + PCIX_SN_WINDOW;
		if (pci_func_id < 4)
			adapter->ahw.ms_win_crb += (pci_func_id * 0x20);
		else
			adapter->ahw.ms_win_crb +=
					0xA0 + ((pci_func_id - 4) * 0x10);
682
	} else {
683
		err = -EIO;
684 685
		goto err_out_free_netdev;
	}
686

687
	dev_info(&pdev->dev, "%dMB memory map\n", (int)(mem_len>>20));
688

689 690 691 692 693
	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",
694
				netxen_nic_driver_name);
695 696 697 698 699 700 701
		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);
A
Al Viro 已提交
702
	if (!db_ptr) {
703
		printk(KERN_ERR "%s: Failed to allocate doorbell map.",
704
				netxen_nic_driver_name);
705 706
		err = -EIO;
		goto err_out_iounmap;
A
Amit S. Kale 已提交
707
	}
708
	DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
A
Amit S. Kale 已提交
709

710
	adapter->ahw.pci_base0 = mem_ptr0;
711
	adapter->ahw.pci_len0 = pci_len0;
712 713 714 715 716 717
	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;
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Amit S. Kale 已提交
718

719
	netif_napi_add(netdev, &adapter->napi,
720 721 722 723 724 725 726 727 728 729 730
			netxen_nic_poll, NETXEN_NETDEV_WEIGHT);

	if (revision_id >= NX_P3_B0)
		legacy_intrp = &legacy_intr[pci_func_id];
	else
		legacy_intrp = &legacy_intr[0];

	adapter->legacy_intr.int_vec_bit = legacy_intrp->int_vec_bit;
	adapter->legacy_intr.tgt_status_reg = legacy_intrp->tgt_status_reg;
	adapter->legacy_intr.tgt_mask_reg = legacy_intrp->tgt_mask_reg;
	adapter->legacy_intr.pci_int_reg = legacy_intrp->pci_int_reg;
731

732 733
	/* this will be read from FW later */
	adapter->intr_scheme = -1;
D
Dhananjay Phadke 已提交
734
	adapter->msi_mode = -1;
735 736

	/* This will be reset for mezz cards  */
737
	adapter->portnum = pci_func_id;
738
	adapter->status   &= ~NETXEN_NETDEV_STATUS;
D
Dhananjay Phadke 已提交
739
	adapter->rx_csum = 1;
740
	adapter->mc_enabled = 0;
D
Dhananjay Phadke 已提交
741
	if (NX_IS_REVISION_P3(revision_id))
742
		adapter->max_mc_count = 38;
D
Dhananjay Phadke 已提交
743
	else
744
		adapter->max_mc_count = 16;
745 746 747 748

	netdev->open		   = netxen_nic_open;
	netdev->stop		   = netxen_nic_close;
	netdev->hard_start_xmit    = netxen_nic_xmit_frame;
749
	netdev->get_stats	   = netxen_nic_get_stats;
750 751 752 753
	if (NX_IS_REVISION_P3(revision_id))
		netdev->set_multicast_list = netxen_p3_nic_set_multi;
	else
		netdev->set_multicast_list = netxen_p2_nic_set_multi;
754 755 756
	netdev->set_mac_address    = netxen_nic_set_mac;
	netdev->change_mtu	   = netxen_nic_change_mtu;
	netdev->tx_timeout	   = netxen_tx_timeout;
D
Dhananjay Phadke 已提交
757
	netdev->watchdog_timeo     = 2*HZ;
758 759 760 761 762 763 764 765 766 767 768

	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;
769 770
	if (NX_IS_REVISION_P3(revision_id)) {
		netdev->features |= NETIF_F_IPV6_CSUM;
771
		netdev->features |= NETIF_F_TSO6;
772
	}
773

774
	if (adapter->pci_using_dac)
775 776
		netdev->features |= NETIF_F_HIGHDMA;

777 778 779 780 781 782
	/*
	 * 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;

783 784
	if (netxen_nic_get_board_info(adapter) != 0) {
		printk("%s: Error getting board config info.\n",
785
				netxen_nic_driver_name);
786 787 788
		err = -EIO;
		goto err_out_iounmap;
	}
789 790 791

	netxen_initialize_adapter_ops(adapter);

792
	/* Mezz cards have PCI function 0,2,3 enabled */
793 794 795 796
	switch (adapter->ahw.boardcfg.board_type) {
	case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
	case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
		if (pci_func_id >= 2)
797
			adapter->portnum = pci_func_id - 2;
798 799 800 801
		break;
	default:
		break;
	}
802

803 804 805 806 807
	/*
	 * This call will setup various max rx/tx counts.
	 * It must be done before any buffer/ring allocations.
	 */
	netxen_check_options(adapter);
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Amit S. Kale 已提交
808

809 810 811 812 813 814 815 816
	first_driver = 0;
	if (NX_IS_REVISION_P3(revision_id)) {
		if (adapter->ahw.pci_func == 0)
			first_driver = 1;
	} else {
		if (adapter->portnum == 0)
			first_driver = 1;
	}
A
Amit S. Kale 已提交
817

818 819 820
	if (first_driver) {
		first_boot = adapter->pci_read_normalize(adapter,
				NETXEN_CAM_RAM(0x1fc));
821

822 823 824 825 826
		err = netxen_check_hw_init(adapter, first_boot);
		if (err) {
			printk(KERN_ERR "%s: error in init HW init sequence\n",
					netxen_nic_driver_name);
			goto err_out_iounmap;
827 828
		}

829 830 831 832
		if (NX_IS_REVISION_P3(revision_id))
			netxen_set_port_mode(adapter);

		if (first_boot != 0x55555555) {
833 834
			adapter->pci_write_normalize(adapter,
						CRB_CMDPEG_STATE, 0);
835 836 837
			netxen_pinit_from_rom(adapter, 0);
			msleep(1);
			netxen_load_firmware(adapter);
838 839 840 841 842 843
		}

		if (NX_IS_REVISION_P3(revision_id))
			netxen_pcie_strap_init(adapter);

		if (NX_IS_REVISION_P2(revision_id)) {
844 845 846 847 848 849 850 851

			/* Initialize multicast addr pool owners */
			val = 0x7654;
			if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
				val |= 0x0f000000;
			netxen_crb_writelit_adapter(adapter,
					NETXEN_MAC_ADDR_CNTL_REG, val);

852
		}
853

854 855 856 857 858 859 860 861 862 863
		if ((first_boot == 0x55555555) &&
			(NX_IS_REVISION_P2(revision_id))) {
			/* Unlock the HW, prompting the boot sequence */
			adapter->pci_write_normalize(adapter,
					NETXEN_ROMUSB_GLB_PEGTUNE_DONE, 1);
		}

		err = netxen_initialize_adapter_offload(adapter);
		if (err)
			goto err_out_iounmap;
864 865 866 867

		/*
		 * Tell the hardware our version number.
		 */
868
		i = (_NETXEN_NIC_LINUX_MAJOR << 16)
869 870
			| ((_NETXEN_NIC_LINUX_MINOR << 8))
			| (_NETXEN_NIC_LINUX_SUBVERSION);
871
		adapter->pci_write_normalize(adapter, CRB_DRIVER_VERSION, i);
A
Amit S. Kale 已提交
872

873 874
		/* Handshake with the card before we register the devices. */
		netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
875 876 877 878

	}	/* first_driver */

	netxen_nic_flash_print(adapter);
A
Amit S. Kale 已提交
879

880 881 882 883 884 885 886 887
	if (NX_IS_REVISION_P3(revision_id)) {
		adapter->hw_read_wx(adapter,
				NETXEN_MIU_MN_CONTROL, &val, 4);
		adapter->ahw.cut_through = (val & 0x4) ? 1 : 0;
		dev_info(&pdev->dev, "firmware running in %s mode\n",
		adapter->ahw.cut_through ? "cut through" : "legacy");
	}

A
Amit S. Kale 已提交
888
	/*
889
	 * See if the firmware gave us a virtual-physical port mapping.
A
Amit S. Kale 已提交
890
	 */
891
	adapter->physical_port = adapter->portnum;
892
	i = adapter->pci_read_normalize(adapter, CRB_V2P(adapter->portnum));
893
	if (i != 0x55555555)
894
		adapter->physical_port = i;
895

896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936
	adapter->flags &= ~(NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED);

	netxen_set_msix_bit(pdev, 0);

	if (NX_IS_REVISION_P3(revision_id)) {
		if ((mem_len != NETXEN_PCI_128MB_SIZE) &&
			mem_len != NETXEN_PCI_2MB_SIZE)
			adapter->msix_supported = 0;
	}

	if (adapter->msix_supported) {

		netxen_init_msix_entries(adapter);

		if (pci_enable_msix(pdev, adapter->msix_entries,
					MSIX_ENTRIES_PER_ADAPTER))
			goto request_msi;

		adapter->flags |= NETXEN_NIC_MSIX_ENABLED;
		netxen_set_msix_bit(pdev, 1);
		dev_info(&pdev->dev, "using msi-x interrupts\n");

	} else {
request_msi:
		if (use_msi && !pci_enable_msi(pdev)) {
			adapter->flags |= NETXEN_NIC_MSI_ENABLED;
			dev_info(&pdev->dev, "using msi interrupts\n");
		} else
			dev_info(&pdev->dev, "using legacy interrupts\n");
	}

	if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
		netdev->irq = adapter->msix_entries[0].vector;
	else
		netdev->irq = pdev->irq;

	err = netxen_receive_peg_ready(adapter);
	if (err)
		goto err_out_disable_msi;

	init_timer(&adapter->watchdog_timer);
937
	adapter->ahw.linkup = 0;
938 939 940 941 942
	adapter->watchdog_timer.function = &netxen_watchdog;
	adapter->watchdog_timer.data = (unsigned long)adapter;
	INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
	INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);

D
Dhananjay Phadke 已提交
943 944 945
	err = netxen_read_mac_addr(adapter);
	if (err)
		dev_warn(&pdev->dev, "failed to read mac addr\n");
946

947 948 949
	netif_carrier_off(netdev);
	netif_stop_queue(netdev);

950 951 952 953 954
	if ((err = register_netdev(netdev))) {
		printk(KERN_ERR "%s: register_netdev failed port #%d"
			       " aborting\n", netxen_nic_driver_name,
			       adapter->portnum);
		err = -EIO;
955
		goto err_out_disable_msi;
956 957 958
	}

	pci_set_drvdata(pdev, adapter);
A
Amit S. Kale 已提交
959

960 961 962 963 964 965 966 967 968
	switch (adapter->ahw.board_type) {
	case NETXEN_NIC_GBE:
		dev_info(&adapter->pdev->dev, "%s: GbE port initialized\n",
				adapter->netdev->name);
		break;
	case NETXEN_NIC_XGBE:
		dev_info(&adapter->pdev->dev, "%s: XGbE port initialized\n",
				adapter->netdev->name);
		break;
A
Amit S. Kale 已提交
969 970
	}

971 972 973 974 975
	return 0;

err_out_disable_msi:
	if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
		pci_disable_msix(pdev);
976 977 978
	if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
		pci_disable_msi(pdev);

979 980
	if (first_driver)
		netxen_free_adapter_offload(adapter);
A
Amit S. Kale 已提交
981

982
err_out_iounmap:
983 984 985 986 987 988 989 990 991
	if (db_ptr)
		iounmap(db_ptr);

	if (mem_ptr0)
		iounmap(mem_ptr0);
	if (mem_ptr1)
		iounmap(mem_ptr1);
	if (mem_ptr2)
		iounmap(mem_ptr2);
992

993 994 995 996
err_out_free_netdev:
	free_netdev(netdev);

err_out_free_res:
A
Amit S. Kale 已提交
997
	pci_release_regions(pdev);
998 999

err_out_disable_pdev:
1000
	pci_set_drvdata(pdev, NULL);
A
Amit S. Kale 已提交
1001 1002 1003 1004 1005 1006 1007
	pci_disable_device(pdev);
	return err;
}

static void __devexit netxen_nic_remove(struct pci_dev *pdev)
{
	struct netxen_adapter *adapter;
1008
	struct net_device *netdev;
A
Amit S. Kale 已提交
1009

1010
	adapter = pci_get_drvdata(pdev);
A
Amit S. Kale 已提交
1011 1012 1013
	if (adapter == NULL)
		return;

1014 1015
	netdev = adapter->netdev;

1016 1017 1018
	unregister_netdev(netdev);

	if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
A
Amit S. Kale 已提交
1019
		netxen_free_hw_resources(adapter);
1020
		netxen_release_rx_buffers(adapter);
1021
		netxen_free_sw_resources(adapter);
1022
	}
A
Amit S. Kale 已提交
1023

1024 1025
	if (adapter->portnum == 0)
		netxen_free_adapter_offload(adapter);
1026

1027 1028 1029
	if (adapter->irq)
		free_irq(adapter->irq, adapter);

1030 1031
	if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
		pci_disable_msix(pdev);
1032 1033 1034
	if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
		pci_disable_msi(pdev);

1035 1036 1037 1038
	iounmap(adapter->ahw.db_base);
	iounmap(adapter->ahw.pci_base0);
	iounmap(adapter->ahw.pci_base1);
	iounmap(adapter->ahw.pci_base2);
1039 1040

	pci_release_regions(pdev);
1041
	pci_disable_device(pdev);
1042 1043
	pci_set_drvdata(pdev, NULL);

1044
	free_netdev(netdev);
A
Amit S. Kale 已提交
1045 1046 1047 1048 1049 1050 1051 1052
}

/*
 * Called when a network interface is made active
 * @returns 0 on success, negative value on failure
 */
static int netxen_nic_open(struct net_device *netdev)
{
1053
	struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
A
Amit S. Kale 已提交
1054 1055
	int err = 0;
	int ctx, ring;
D
Dhananjay Phadke 已提交
1056 1057
	irq_handler_t handler;
	unsigned long flags = IRQF_SAMPLE_RANDOM;
A
Amit S. Kale 已提交
1058

1059 1060 1061
	if (adapter->driver_mismatch)
		return -EIO;

A
Amit S. Kale 已提交
1062 1063 1064 1065 1066 1067 1068
	if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
		err = netxen_init_firmware(adapter);
		if (err != 0) {
			printk(KERN_ERR "Failed to init firmware\n");
			return -EIO;
		}

D
Dhananjay Phadke 已提交
1069 1070 1071 1072 1073
		if (adapter->fw_major < 4)
			adapter->max_rds_rings = 3;
		else
			adapter->max_rds_rings = 2;

1074
		err = netxen_alloc_sw_resources(adapter);
A
Amit S. Kale 已提交
1075
		if (err) {
1076 1077
			printk(KERN_ERR "%s: Error in setting sw resources\n",
					netdev->name);
A
Amit S. Kale 已提交
1078 1079
			return err;
		}
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095

		netxen_nic_clear_stats(adapter);

		err = netxen_alloc_hw_resources(adapter);
		if (err) {
			printk(KERN_ERR "%s: Error in setting hw resources\n",
					netdev->name);
			goto err_out_free_sw;
		}

		if (adapter->fw_major < 4) {
			adapter->crb_addr_cmd_producer =
				crb_cmd_producer[adapter->portnum];
			adapter->crb_addr_cmd_consumer =
				crb_cmd_consumer[adapter->portnum];

D
Dhananjay Phadke 已提交
1096 1097 1098
			netxen_nic_update_cmd_producer(adapter, 0);
			netxen_nic_update_cmd_consumer(adapter, 0);
		}
1099

A
Amit S. Kale 已提交
1100
		for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
D
Dhananjay Phadke 已提交
1101
			for (ring = 0; ring < adapter->max_rds_rings; ring++)
A
Amit S. Kale 已提交
1102 1103
				netxen_post_rx_buffers(adapter, ctx, ring);
		}
1104
		if (NETXEN_IS_MSI_FAMILY(adapter))
D
Dhananjay Phadke 已提交
1105 1106 1107 1108 1109
			handler = netxen_msi_intr;
		else {
			flags |= IRQF_SHARED;
			handler = netxen_intr;
		}
1110
		adapter->irq = netdev->irq;
D
Dhananjay Phadke 已提交
1111 1112
		err = request_irq(adapter->irq, handler,
				  flags, netdev->name, adapter);
A
Amit S. Kale 已提交
1113 1114
		if (err) {
			printk(KERN_ERR "request_irq failed with: %d\n", err);
1115
			goto err_out_free_rxbuf;
A
Amit S. Kale 已提交
1116
		}
1117 1118 1119

		adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
	}
1120

A
Amit S. Kale 已提交
1121 1122
	/* Done here again so that even if phantom sw overwrote it,
	 * we set it */
1123
	err = adapter->init_port(adapter, adapter->physical_port);
1124
	if (err) {
1125 1126
		printk(KERN_ERR "%s: Failed to initialize port %d\n",
				netxen_nic_driver_name, adapter->portnum);
1127
		goto err_out_free_irq;
1128
	}
1129
	adapter->macaddr_set(adapter, netdev->dev_addr);
1130

1131
	netxen_nic_set_link_parameters(adapter);
A
Amit S. Kale 已提交
1132

1133
	netdev->set_multicast_list(netdev);
1134
	if (adapter->set_mtu)
1135
		adapter->set_mtu(adapter, netdev->mtu);
1136

1137
	mod_timer(&adapter->watchdog_timer, jiffies);
D
Dhananjay Phadke 已提交
1138 1139 1140 1141

	napi_enable(&adapter->napi);
	netxen_nic_enable_int(adapter);

1142
	netif_start_queue(netdev);
A
Amit S. Kale 已提交
1143 1144

	return 0;
1145 1146 1147

err_out_free_irq:
	free_irq(adapter->irq, adapter);
1148 1149
err_out_free_rxbuf:
	netxen_release_rx_buffers(adapter);
1150 1151 1152 1153
	netxen_free_hw_resources(adapter);
err_out_free_sw:
	netxen_free_sw_resources(adapter);
	return err;
A
Amit S. Kale 已提交
1154 1155 1156 1157 1158 1159 1160
}

/*
 * netxen_nic_close - Disables a network interface entry point
 */
static int netxen_nic_close(struct net_device *netdev)
{
1161
	struct netxen_adapter *adapter = netdev_priv(netdev);
A
Amit S. Kale 已提交
1162 1163 1164

	netif_carrier_off(netdev);
	netif_stop_queue(netdev);
1165
	napi_disable(&adapter->napi);
A
Amit S. Kale 已提交
1166

1167 1168 1169
	if (adapter->stop_port)
		adapter->stop_port(adapter);

1170 1171
	netxen_nic_disable_int(adapter);

1172 1173
	netxen_release_tx_buffers(adapter);

1174 1175 1176 1177
	if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
		FLUSH_SCHEDULED_WORK();
		del_timer_sync(&adapter->watchdog_timer);
	}
A
Amit S. Kale 已提交
1178 1179 1180 1181

	return 0;
}

1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
void netxen_tso_check(struct netxen_adapter *adapter,
		      struct cmd_desc_type0 *desc, struct sk_buff *skb)
{
	if (desc->mss) {
		desc->total_hdr_length = (sizeof(struct ethhdr) +
					  ip_hdrlen(skb) + tcp_hdrlen(skb));

		if ((NX_IS_REVISION_P3(adapter->ahw.revision_id)) &&
				(skb->protocol == htons(ETH_P_IPV6)))
			netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO6);
		else
			netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO);

	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
		if (ip_hdr(skb)->protocol == IPPROTO_TCP)
			netxen_set_cmd_desc_opcode(desc, TX_TCP_PKT);
		else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
			netxen_set_cmd_desc_opcode(desc, TX_UDP_PKT);
		else
			return;
	}
	desc->tcp_hdr_offset = skb_transport_offset(skb);
	desc->ip_hdr_offset = skb_network_offset(skb);
}

A
Amit S. Kale 已提交
1207 1208
static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
1209
	struct netxen_adapter *adapter = netdev_priv(netdev);
A
Amit S. Kale 已提交
1210 1211 1212 1213 1214
	struct netxen_hardware_context *hw = &adapter->ahw;
	unsigned int first_seg_len = skb->len - skb->data_len;
	struct netxen_skb_frag *buffrag;
	unsigned int i;

1215
	u32 producer, consumer;
A
Amit S. Kale 已提交
1216 1217 1218 1219 1220 1221
	u32 saved_producer = 0;
	struct cmd_desc_type0 *hwdesc;
	int k;
	struct netxen_cmd_buffer *pbuf = NULL;
	int frag_count;
	int no_of_desc;
1222
	u32 num_txd = adapter->max_tx_desc_count;
A
Amit S. Kale 已提交
1223 1224 1225 1226 1227

	frag_count = skb_shinfo(skb)->nr_frags + 1;

	/* There 4 fragments per descriptor */
	no_of_desc = (frag_count + 3) >> 2;
1228
	if (netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1229 1230
		if (skb_shinfo(skb)->gso_size > 0) {

A
Amit S. Kale 已提交
1231
			no_of_desc++;
1232
			if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
1233
			     sizeof(struct ethhdr)) >
1234
			    (sizeof(struct cmd_desc_type0) - 2)) {
1235 1236
				no_of_desc++;
			}
A
Amit S. Kale 已提交
1237 1238
		}
	}
1239

1240 1241 1242 1243 1244 1245 1246
	producer = adapter->cmd_producer;
	smp_mb();
	consumer = adapter->last_cmd_consumer;
	if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
		netif_stop_queue(netdev);
		smp_mb();
		return NETDEV_TX_BUSY;
1247
	}
A
Amit S. Kale 已提交
1248 1249 1250 1251 1252 1253 1254

	/* Copy the descriptors into the hardware    */
	saved_producer = producer;
	hwdesc = &hw->cmd_desc_head[producer];
	memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
	/* Take skb->data itself */
	pbuf = &adapter->cmd_buf_arr[producer];
1255 1256
	if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
			skb_shinfo(skb)->gso_size > 0) {
A
Al Viro 已提交
1257
		pbuf->mss = skb_shinfo(skb)->gso_size;
A
Amit S. Kale 已提交
1258
		hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
A
Amit S. Kale 已提交
1259 1260 1261 1262 1263 1264 1265 1266
	} else {
		pbuf->mss = 0;
		hwdesc->mss = 0;
	}
	pbuf->total_length = skb->len;
	pbuf->skb = skb;
	pbuf->cmd = TX_ETHER_PKT;
	pbuf->frag_count = frag_count;
1267
	pbuf->port = adapter->portnum;
A
Amit S. Kale 已提交
1268
	buffrag = &pbuf->frag_array[0];
1269
	buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
A
Amit S. Kale 已提交
1270 1271
				      PCI_DMA_TODEVICE);
	buffrag->length = first_seg_len;
1272 1273 1274
	netxen_set_cmd_desc_totallength(hwdesc, skb->len);
	netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
	netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
A
Amit S. Kale 已提交
1275

1276
	netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
1277
	netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
A
Amit S. Kale 已提交
1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289
	hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
	hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);

	for (i = 1, k = 1; i < frag_count; i++, k++) {
		struct skb_frag_struct *frag;
		int len, temp_len;
		unsigned long offset;
		dma_addr_t temp_dma;

		/* move to next desc. if there is a need */
		if ((i & 0x3) == 0) {
			k = 0;
1290
			producer = get_next_index(producer, num_txd);
A
Amit S. Kale 已提交
1291 1292
			hwdesc = &hw->cmd_desc_head[producer];
			memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1293 1294
			pbuf = &adapter->cmd_buf_arr[producer];
			pbuf->skb = NULL;
A
Amit S. Kale 已提交
1295 1296 1297 1298 1299 1300
		}
		frag = &skb_shinfo(skb)->frags[i - 1];
		len = frag->size;
		offset = frag->page_offset;

		temp_len = len;
1301
		temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
A
Amit S. Kale 已提交
1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321
					len, PCI_DMA_TODEVICE);

		buffrag++;
		buffrag->dma = temp_dma;
		buffrag->length = temp_len;

		switch (k) {
		case 0:
			hwdesc->buffer1_length = cpu_to_le16(temp_len);
			hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
			break;
		case 1:
			hwdesc->buffer2_length = cpu_to_le16(temp_len);
			hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
			break;
		case 2:
			hwdesc->buffer3_length = cpu_to_le16(temp_len);
			hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
			break;
		case 3:
A
Al Viro 已提交
1322
			hwdesc->buffer4_length = cpu_to_le16(temp_len);
A
Amit S. Kale 已提交
1323 1324 1325 1326 1327
			hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
			break;
		}
		frag++;
	}
1328
	producer = get_next_index(producer, num_txd);
A
Amit S. Kale 已提交
1329 1330 1331 1332 1333 1334 1335

	/* might change opcode to TX_TCP_LSO */
	netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);

	/* For LSO, we need to copy the MAC/IP/TCP headers into
	 * the descriptor ring
	 */
1336 1337
	if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
	    == TX_TCP_LSO) {
A
Amit S. Kale 已提交
1338 1339
		int hdr_len, first_hdr_len, more_hdr;
		hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
1340 1341
		if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
			first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
A
Amit S. Kale 已提交
1342 1343 1344 1345 1346 1347 1348
			more_hdr = 1;
		} else {
			first_hdr_len = hdr_len;
			more_hdr = 0;
		}
		/* copy the MAC/IP/TCP headers to the cmd descriptor list */
		hwdesc = &hw->cmd_desc_head[producer];
1349 1350
		pbuf = &adapter->cmd_buf_arr[producer];
		pbuf->skb = NULL;
A
Amit S. Kale 已提交
1351 1352

		/* copy the first 64 bytes */
1353
		memcpy(((void *)hwdesc) + 2,
A
Amit S. Kale 已提交
1354
		       (void *)(skb->data), first_hdr_len);
1355
		producer = get_next_index(producer, num_txd);
A
Amit S. Kale 已提交
1356 1357 1358

		if (more_hdr) {
			hwdesc = &hw->cmd_desc_head[producer];
1359 1360
			pbuf = &adapter->cmd_buf_arr[producer];
			pbuf->skb = NULL;
A
Amit S. Kale 已提交
1361 1362 1363
			/* copy the next 64 bytes - should be enough except
			 * for pathological case
			 */
1364 1365 1366 1367
			skb_copy_from_linear_data_offset(skb, first_hdr_len,
							 hwdesc,
							 (hdr_len -
							  first_hdr_len));
1368
			producer = get_next_index(producer, num_txd);
A
Amit S. Kale 已提交
1369 1370
		}
	}
1371

1372
	adapter->cmd_producer = producer;
1373
	adapter->stats.txbytes += skb->len;
1374

1375
	netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
A
Amit S. Kale 已提交
1376

1377
	adapter->stats.xmitcalled++;
A
Amit S. Kale 已提交
1378 1379 1380 1381 1382
	netdev->trans_start = jiffies;

	return NETDEV_TX_OK;
}

1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429
static int netxen_nic_check_temp(struct netxen_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	uint32_t temp, temp_state, temp_val;
	int rv = 0;

	temp = adapter->pci_read_normalize(adapter, CRB_TEMP_STATE);

	temp_state = nx_get_temp_state(temp);
	temp_val = nx_get_temp_val(temp);

	if (temp_state == NX_TEMP_PANIC) {
		printk(KERN_ALERT
		       "%s: Device temperature %d degrees C exceeds"
		       " maximum allowed. Hardware has been shut down.\n",
		       netxen_nic_driver_name, temp_val);

		netif_carrier_off(netdev);
		netif_stop_queue(netdev);
		rv = 1;
	} else if (temp_state == NX_TEMP_WARN) {
		if (adapter->temp == NX_TEMP_NORMAL) {
			printk(KERN_ALERT
			       "%s: Device temperature %d degrees C "
			       "exceeds operating range."
			       " Immediate action needed.\n",
			       netxen_nic_driver_name, temp_val);
		}
	} else {
		if (adapter->temp == NX_TEMP_WARN) {
			printk(KERN_INFO
			       "%s: Device temperature is now %d degrees C"
			       " in normal range.\n", netxen_nic_driver_name,
			       temp_val);
		}
	}
	adapter->temp = temp_state;
	return rv;
}

static void netxen_nic_handle_phy_intr(struct netxen_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	u32 val, port, linkup;

	port = adapter->physical_port;

1430 1431 1432 1433
	if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
		val = adapter->pci_read_normalize(adapter, CRB_XG_STATE_P3);
		val = XG_LINK_STATE_P3(adapter->ahw.pci_func, val);
		linkup = (val == XG_LINK_UP_P3);
1434
	} else {
1435 1436 1437 1438
		val = adapter->pci_read_normalize(adapter, CRB_XG_STATE);
		if (adapter->ahw.board_type == NETXEN_NIC_GBE)
			linkup = (val >> port) & 1;
		else {
1439 1440 1441
			val = (val >> port*8) & 0xff;
			linkup = (val == XG_LINK_UP);
		}
1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462
	}

	if (adapter->ahw.linkup && !linkup) {
		printk(KERN_INFO "%s: %s NIC Link is down\n",
		       netxen_nic_driver_name, netdev->name);
		adapter->ahw.linkup = 0;
		if (netif_running(netdev)) {
			netif_carrier_off(netdev);
			netif_stop_queue(netdev);
		}
	} else if (!adapter->ahw.linkup && linkup) {
		printk(KERN_INFO "%s: %s NIC Link is up\n",
		       netxen_nic_driver_name, netdev->name);
		adapter->ahw.linkup = 1;
		if (netif_running(netdev)) {
			netif_carrier_on(netdev);
			netif_wake_queue(netdev);
		}
	}
}

A
Amit S. Kale 已提交
1463 1464 1465
static void netxen_watchdog(unsigned long v)
{
	struct netxen_adapter *adapter = (struct netxen_adapter *)v;
1466 1467

	SCHEDULE_WORK(&adapter->watchdog_task);
A
Amit S. Kale 已提交
1468 1469
}

1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482
void netxen_watchdog_task(struct work_struct *work)
{
	struct netxen_adapter *adapter =
		container_of(work, struct netxen_adapter, watchdog_task);

	if ((adapter->portnum  == 0) && netxen_nic_check_temp(adapter))
		return;

	netxen_nic_handle_phy_intr(adapter);

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

A
Amit S. Kale 已提交
1483 1484
static void netxen_tx_timeout(struct net_device *netdev)
{
1485 1486 1487
	struct netxen_adapter *adapter = (struct netxen_adapter *)
						netdev_priv(netdev);
	SCHEDULE_WORK(&adapter->tx_timeout_task);
A
Amit S. Kale 已提交
1488 1489
}

1490
static void netxen_tx_timeout_task(struct work_struct *work)
A
Amit S. Kale 已提交
1491
{
1492
	struct netxen_adapter *adapter =
1493
		container_of(work, struct netxen_adapter, tx_timeout_task);
A
Amit S. Kale 已提交
1494 1495

	printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
1496
	       netxen_nic_driver_name, adapter->netdev->name);
A
Amit S. Kale 已提交
1497

1498 1499 1500
	netxen_nic_disable_int(adapter);
	napi_disable(&adapter->napi);

1501
	adapter->netdev->trans_start = jiffies;
1502 1503 1504

	napi_enable(&adapter->napi);
	netxen_nic_enable_int(adapter);
1505
	netif_wake_queue(adapter->netdev);
A
Amit S. Kale 已提交
1506 1507
}

1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539
/*
 * netxen_nic_get_stats - Get System Network Statistics
 * @netdev: network interface device structure
 */
struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev)
{
	struct netxen_adapter *adapter = netdev_priv(netdev);
	struct net_device_stats *stats = &adapter->net_stats;

	memset(stats, 0, sizeof(*stats));

	/* total packets received   */
	stats->rx_packets = adapter->stats.no_rcv;
	/* total packets transmitted    */
	stats->tx_packets = adapter->stats.xmitedframes +
		adapter->stats.xmitfinished;
	/* total bytes received     */
	stats->rx_bytes = adapter->stats.rxbytes;
	/* total bytes transmitted  */
	stats->tx_bytes = adapter->stats.txbytes;
	/* bad packets received     */
	stats->rx_errors = adapter->stats.rcvdbadskb;
	/* packet transmit problems */
	stats->tx_errors = adapter->stats.nocmddescriptor;
	/* no space in linux buffers    */
	stats->rx_dropped = adapter->stats.rxdropped;
	/* no space available in linux  */
	stats->tx_dropped = adapter->stats.txdropped;

	return stats;
}

D
Dhananjay Phadke 已提交
1540 1541
static inline void
netxen_handle_int(struct netxen_adapter *adapter)
A
Amit S. Kale 已提交
1542
{
1543
	netxen_nic_disable_int(adapter);
D
Dhananjay Phadke 已提交
1544
	napi_schedule(&adapter->napi);
A
Amit S. Kale 已提交
1545 1546
}

1547
static irqreturn_t netxen_intr(int irq, void *data)
A
Amit S. Kale 已提交
1548
{
1549
	struct netxen_adapter *adapter = data;
1550
	u32 our_int = 0;
A
Amit S. Kale 已提交
1551

D
Dhananjay Phadke 已提交
1552 1553 1554 1555 1556
	u32 status = 0;

	status = adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);

	if (!(status & adapter->legacy_intr.int_vec_bit))
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		return IRQ_NONE;
1558

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	if (adapter->ahw.revision_id >= NX_P3_B1) {
		/* check interrupt state machine, to be sure */
		status = adapter->pci_read_immediate(adapter,
				ISR_INT_STATE_REG);
		if (!ISR_LEGACY_INT_TRIGGERED(status))
			return IRQ_NONE;

	} else if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {

		our_int = adapter->pci_read_normalize(adapter, CRB_INT_VECTOR);
		/* not our interrupt */
		if ((our_int & (0x80 << adapter->portnum)) == 0)
			return IRQ_NONE;

		if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
			/* claim interrupt */
			adapter->pci_write_normalize(adapter,
				CRB_INT_VECTOR,
1577
				our_int & ~((u32)(0x80 << adapter->portnum)));
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		}
1579 1580
	}

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	netxen_handle_int(adapter);
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	return IRQ_HANDLED;
}

1586
static irqreturn_t netxen_msi_intr(int irq, void *data)
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{
	struct netxen_adapter *adapter = data;

	netxen_handle_int(adapter);
	return IRQ_HANDLED;
}

1594
static int netxen_nic_poll(struct napi_struct *napi, int budget)
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{
1596
	struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
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	int tx_complete;
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	int ctx;
1599
	int work_done;
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	tx_complete = netxen_process_cmd_ring(adapter);
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1603
	work_done = 0;
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	for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
		/*
		 * Fairness issue. This will give undue weight to the
		 * receive context 0.
		 */

		/*
		 * To avoid starvation, we give each of our receivers,
		 * a fraction of the quota. Sometimes, it might happen that we
		 * have enough quota to process every packet, but since all the
		 * packets are on one context, it gets only half of the quota,
		 * and ends up not processing it.
		 */
1617 1618
		work_done += netxen_process_rcv_ring(adapter, ctx,
						     budget / MAX_RCV_CTX);
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	}

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	if ((work_done < budget) && tx_complete) {
		netif_rx_complete(adapter->netdev, &adapter->napi);
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		netxen_nic_enable_int(adapter);
	}

1626
	return work_done;
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}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void netxen_nic_poll_controller(struct net_device *netdev)
{
1632
	struct netxen_adapter *adapter = netdev_priv(netdev);
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	disable_irq(adapter->irq);
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	netxen_intr(adapter->irq, adapter);
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	enable_irq(adapter->irq);
}
#endif

static struct pci_driver netxen_driver = {
	.name = netxen_nic_driver_name,
	.id_table = netxen_pci_tbl,
	.probe = netxen_nic_probe,
	.remove = __devexit_p(netxen_nic_remove)
};

/* Driver Registration on NetXen card    */

static int __init netxen_init_module(void)
{
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	if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
1651 1652
		return -ENOMEM;

1653
	return pci_register_driver(&netxen_driver);
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}

module_init(netxen_init_module);

static void __exit netxen_exit_module(void)
{
	pci_unregister_driver(&netxen_driver);
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	destroy_workqueue(netxen_workq);
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}

module_exit(netxen_exit_module);