netxen_nic_init.c

/*
 * 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:
 *    info@netxen.com
 * NetXen,
 * 3965 Freedom Circle, Fourth floor,
 * Santa Clara, CA 95054
 *
 *
 * Source file for NIC routines to initialize the Phantom Hardware
 *
 */

#include <linux/netdevice.h>
#include <linux/delay.h>
#include "netxen_nic.h"
#include "netxen_nic_hw.h"
#include "netxen_nic_phan_reg.h"

struct crb_addr_pair {
	u32 addr;
	u32 data;
};

unsigned long last_schedule_time;

#define NETXEN_MAX_CRB_XFORM 60
static unsigned int crb_addr_xform[NETXEN_MAX_CRB_XFORM];
#define NETXEN_ADDR_ERROR (0xffffffff)

#define crb_addr_transform(name) \
	crb_addr_xform[NETXEN_HW_PX_MAP_CRB_##name] = \
	NETXEN_HW_CRB_HUB_AGT_ADR_##name << 20

#define NETXEN_NIC_XDMA_RESET 0x8000ff

static void netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter,
					uint32_t ctx, uint32_t ringid);

#if 0
static void netxen_nic_locked_write_reg(struct netxen_adapter *adapter,
					unsigned long off, int *data)
{
	void __iomem *addr = pci_base_offset(adapter, off);
	writel(*data, addr);
}
#endif  /*  0  */

static void crb_addr_transform_setup(void)
{
	crb_addr_transform(XDMA);
	crb_addr_transform(TIMR);
	crb_addr_transform(SRE);
	crb_addr_transform(SQN3);
	crb_addr_transform(SQN2);
	crb_addr_transform(SQN1);
	crb_addr_transform(SQN0);
	crb_addr_transform(SQS3);
	crb_addr_transform(SQS2);
	crb_addr_transform(SQS1);
	crb_addr_transform(SQS0);
	crb_addr_transform(RPMX7);
	crb_addr_transform(RPMX6);
	crb_addr_transform(RPMX5);
	crb_addr_transform(RPMX4);
	crb_addr_transform(RPMX3);
	crb_addr_transform(RPMX2);
	crb_addr_transform(RPMX1);
	crb_addr_transform(RPMX0);
	crb_addr_transform(ROMUSB);
	crb_addr_transform(SN);
	crb_addr_transform(QMN);
	crb_addr_transform(QMS);
	crb_addr_transform(PGNI);
	crb_addr_transform(PGND);
	crb_addr_transform(PGN3);
	crb_addr_transform(PGN2);
	crb_addr_transform(PGN1);
	crb_addr_transform(PGN0);
	crb_addr_transform(PGSI);
	crb_addr_transform(PGSD);
	crb_addr_transform(PGS3);
	crb_addr_transform(PGS2);
	crb_addr_transform(PGS1);
	crb_addr_transform(PGS0);
	crb_addr_transform(PS);
	crb_addr_transform(PH);
	crb_addr_transform(NIU);
	crb_addr_transform(I2Q);
	crb_addr_transform(EG);
	crb_addr_transform(MN);
	crb_addr_transform(MS);
	crb_addr_transform(CAS2);
	crb_addr_transform(CAS1);
	crb_addr_transform(CAS0);
	crb_addr_transform(CAM);
	crb_addr_transform(C2C1);
	crb_addr_transform(C2C0);
	crb_addr_transform(SMB);
}

int netxen_init_firmware(struct netxen_adapter *adapter)
{
	u32 state = 0, loops = 0, err = 0;

	/* Window 1 call */
	state = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));

	if (state == PHAN_INITIALIZE_ACK)
		return 0;

	while (state != PHAN_INITIALIZE_COMPLETE && loops < 2000) {
		udelay(100);
		/* Window 1 call */
		state = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));

		loops++;
	}
	if (loops >= 2000) {
		printk(KERN_ERR "Cmd Peg initialization not complete:%x.\n",
		       state);
		err = -EIO;
		return err;
	}
	/* Window 1 call */
	writel(INTR_SCHEME_PERPORT,
	       NETXEN_CRB_NORMALIZE(adapter, CRB_NIC_CAPABILITIES_HOST));
	writel(MPORT_MULTI_FUNCTION_MODE,
	       NETXEN_CRB_NORMALIZE(adapter, CRB_MPORT_MODE));
	writel(PHAN_INITIALIZE_ACK,
	       NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));

	return err;
}

#define NETXEN_ADDR_LIMIT 0xffffffffULL

void *netxen_alloc(struct pci_dev *pdev, size_t sz, dma_addr_t * ptr,
		   struct pci_dev **used_dev)
{
	void *addr;

	addr = pci_alloc_consistent(pdev, sz, ptr);
	if ((unsigned long long)(*ptr) < NETXEN_ADDR_LIMIT) {
		*used_dev = pdev;
		return addr;
	}
	pci_free_consistent(pdev, sz, addr, *ptr);
	addr = pci_alloc_consistent(NULL, sz, ptr);
	*used_dev = NULL;
	return addr;
}

void netxen_initialize_adapter_sw(struct netxen_adapter *adapter)
{
	int ctxid, ring;
	u32 i;
	u32 num_rx_bufs = 0;
	struct netxen_rcv_desc_ctx *rcv_desc;

	DPRINTK(INFO, "initializing some queues: %p\n", adapter);
	for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
		for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
			struct netxen_rx_buffer *rx_buf;
			rcv_desc = &adapter->recv_ctx[ctxid].rcv_desc[ring];
			rcv_desc->rcv_free = rcv_desc->max_rx_desc_count;
			rcv_desc->begin_alloc = 0;
			rx_buf = rcv_desc->rx_buf_arr;
			num_rx_bufs = rcv_desc->max_rx_desc_count;
			/*
			 * Now go through all of them, set reference handles
			 * and put them in the queues.
			 */
			for (i = 0; i < num_rx_bufs; i++) {
				rx_buf->ref_handle = i;
				rx_buf->state = NETXEN_BUFFER_FREE;
				DPRINTK(INFO, "Rx buf:ctx%d i(%d) rx_buf:"
					"%p\n", ctxid, i, rx_buf);
				rx_buf++;
			}
		}
	}
}

void netxen_initialize_adapter_hw(struct netxen_adapter *adapter)
{
	int ports = 0;
	struct netxen_board_info *board_info = &(adapter->ahw.boardcfg);

	if (netxen_nic_get_board_info(adapter) != 0)
		printk("%s: Error getting board config info.\n",
		       netxen_nic_driver_name);
	get_brd_port_by_type(board_info->board_type, &ports);
	if (ports == 0)
		printk(KERN_ERR "%s: Unknown board type\n",
		       netxen_nic_driver_name);
	adapter->ahw.max_ports = ports;
}

void netxen_initialize_adapter_ops(struct netxen_adapter *adapter)
{
	switch (adapter->ahw.board_type) {
	case NETXEN_NIC_GBE:
		adapter->enable_phy_interrupts =
		    netxen_niu_gbe_enable_phy_interrupts;
		adapter->disable_phy_interrupts =
		    netxen_niu_gbe_disable_phy_interrupts;
		adapter->handle_phy_intr = netxen_nic_gbe_handle_phy_intr;
		adapter->macaddr_set = netxen_niu_macaddr_set;
		adapter->set_mtu = netxen_nic_set_mtu_gb;
		adapter->set_promisc = netxen_niu_set_promiscuous_mode;
		adapter->unset_promisc = netxen_niu_set_promiscuous_mode;
		adapter->phy_read = netxen_niu_gbe_phy_read;
		adapter->phy_write = netxen_niu_gbe_phy_write;
		adapter->init_niu = netxen_nic_init_niu_gb;
		adapter->stop_port = netxen_niu_disable_gbe_port;
		break;

	case NETXEN_NIC_XGBE:
		adapter->enable_phy_interrupts =
		    netxen_niu_xgbe_enable_phy_interrupts;
		adapter->disable_phy_interrupts =
		    netxen_niu_xgbe_disable_phy_interrupts;
		adapter->handle_phy_intr = netxen_nic_xgbe_handle_phy_intr;
		adapter->macaddr_set = netxen_niu_xg_macaddr_set;
		adapter->set_mtu = netxen_nic_set_mtu_xgb;
		adapter->init_port = netxen_niu_xg_init_port;
		adapter->set_promisc = netxen_niu_xg_set_promiscuous_mode;
		adapter->unset_promisc = netxen_niu_xg_set_promiscuous_mode;
		adapter->stop_port = netxen_niu_disable_xg_port;
		break;

	default:
		break;
	}
}

/*
 * netxen_decode_crb_addr(0 - utility to translate from internal Phantom CRB
 * address to external PCI CRB address.
 */
static u32 netxen_decode_crb_addr(u32 addr)
{
	int i;
	u32 base_addr, offset, pci_base;

	crb_addr_transform_setup();

	pci_base = NETXEN_ADDR_ERROR;
	base_addr = addr & 0xfff00000;
	offset = addr & 0x000fffff;

	for (i = 0; i < NETXEN_MAX_CRB_XFORM; i++) {
		if (crb_addr_xform[i] == base_addr) {
			pci_base = i << 20;
			break;
		}
	}
	if (pci_base == NETXEN_ADDR_ERROR)
		return pci_base;
	else
		return (pci_base + offset);
}

static long rom_max_timeout = 100;
static long rom_lock_timeout = 10000;
static long rom_write_timeout = 700;

static int rom_lock(struct netxen_adapter *adapter)
{
	int iter;
	u32 done = 0;
	int timeout = 0;

	while (!done) {
		/* acquire semaphore2 from PCI HW block */
		netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(PCIE_SEM2_LOCK),
				   &done);
		if (done == 1)
			break;
		if (timeout >= rom_lock_timeout)
			return -EIO;

		timeout++;
		/*
		 * Yield CPU
		 */
		if (!in_atomic())
			schedule();
		else {
			for (iter = 0; iter < 20; iter++)
				cpu_relax();	/*This a nop instr on i386 */
		}
	}
	netxen_nic_reg_write(adapter, NETXEN_ROM_LOCK_ID, ROM_LOCK_DRIVER);
	return 0;
}

static int netxen_wait_rom_done(struct netxen_adapter *adapter)
{
	long timeout = 0;
	long done = 0;

	while (done == 0) {
		done = netxen_nic_reg_read(adapter, NETXEN_ROMUSB_GLB_STATUS);
		done &= 2;
		timeout++;
		if (timeout >= rom_max_timeout) {
			printk("Timeout reached  waiting for rom done");
			return -EIO;
		}
	}
	return 0;
}

static int netxen_rom_wren(struct netxen_adapter *adapter)
{
	/* Set write enable latch in ROM status register */
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE,
			     M25P_INSTR_WREN);
	if (netxen_wait_rom_done(adapter)) {
		return -1;
	}
	return 0;
}

static unsigned int netxen_rdcrbreg(struct netxen_adapter *adapter,
				    unsigned int addr)
{
	unsigned int data = 0xdeaddead;
	data = netxen_nic_reg_read(adapter, addr);
	return data;
}

static int netxen_do_rom_rdsr(struct netxen_adapter *adapter)
{
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE,
			     M25P_INSTR_RDSR);
	if (netxen_wait_rom_done(adapter)) {
		return -1;
	}
	return netxen_rdcrbreg(adapter, NETXEN_ROMUSB_ROM_RDATA);
}

static void netxen_rom_unlock(struct netxen_adapter *adapter)
{
	u32 val;

	/* release semaphore2 */
	netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(PCIE_SEM2_UNLOCK), &val);

}

static int netxen_rom_wip_poll(struct netxen_adapter *adapter)
{
	long timeout = 0;
	long wip = 1;
	int val;
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
	while (wip != 0) {
		val = netxen_do_rom_rdsr(adapter);
		wip = val & 1;
		timeout++;
		if (timeout > rom_max_timeout) {
			return -1;
		}
	}
	return 0;
}

static int do_rom_fast_write(struct netxen_adapter *adapter, int addr,
			     int data)
{
	if (netxen_rom_wren(adapter)) {
		return -1;
	}
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_WDATA, data);
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE,
			     M25P_INSTR_PP);
	if (netxen_wait_rom_done(adapter)) {
		netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
		return -1;
	}

	return netxen_rom_wip_poll(adapter);
}

static int do_rom_fast_read(struct netxen_adapter *adapter,
			    int addr, int *valp)
{
	cond_resched();

	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
	udelay(100);		/* prevent bursting on CRB */
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE, 0xb);
	if (netxen_wait_rom_done(adapter)) {
		printk("Error waiting for rom done\n");
		return -EIO;
	}
	/* reset abyte_cnt and dummy_byte_cnt */
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
	udelay(100);		/* prevent bursting on CRB */
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);

	*valp = netxen_nic_reg_read(adapter, NETXEN_ROMUSB_ROM_RDATA);
	return 0;
}

static int do_rom_fast_read_words(struct netxen_adapter *adapter, int addr,
				  u8 *bytes, size_t size)
{
	int addridx;
	int ret = 0;

	for (addridx = addr; addridx < (addr + size); addridx += 4) {
		ret = do_rom_fast_read(adapter, addridx, (int *)bytes);
		if (ret != 0)
			break;
		*(int *)bytes = cpu_to_le32(*(int *)bytes);
		bytes += 4;
	}

	return ret;
}

int
netxen_rom_fast_read_words(struct netxen_adapter *adapter, int addr, 
				u8 *bytes, size_t size)
{
	int ret;

	ret = rom_lock(adapter);
	if (ret < 0)
		return ret;

	ret = do_rom_fast_read_words(adapter, addr, bytes, size);

	netxen_rom_unlock(adapter);
	return ret;
}

int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
{
	int ret;

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

	ret = do_rom_fast_read(adapter, addr, valp);
	netxen_rom_unlock(adapter);
	return ret;
}

#if 0
int netxen_rom_fast_write(struct netxen_adapter *adapter, int addr, int data)
{
	int ret = 0;

	if (rom_lock(adapter) != 0) {
		return -1;
	}
	ret = do_rom_fast_write(adapter, addr, data);
	netxen_rom_unlock(adapter);
	return ret;
}
#endif  /*  0  */

static int do_rom_fast_write_words(struct netxen_adapter *adapter, 
				   int addr, u8 *bytes, size_t size)
{
	int addridx = addr;
	int ret = 0;

	while (addridx < (addr + size)) {
		int last_attempt = 0;
		int timeout = 0;
		int data;

		data = le32_to_cpu((*(u32*)bytes));
		ret = do_rom_fast_write(adapter, addridx, data);
		if (ret < 0)
			return ret;
			
		while(1) {
			int data1;

			ret = do_rom_fast_read(adapter, addridx, &data1);
			if (ret < 0)
				return ret;

			if (data1 == data)
				break;

			if (timeout++ >= rom_write_timeout) {
				if (last_attempt++ < 4) {
					ret = do_rom_fast_write(adapter, 
								addridx, data);
					if (ret < 0)
						return ret;
				}
				else {
					printk(KERN_INFO "Data write did not "
					   "succeed at address 0x%x\n", addridx);
					break;
				}
			}
		}

		bytes += 4;
		addridx += 4;
	}

	return ret;
}

int netxen_rom_fast_write_words(struct netxen_adapter *adapter, int addr, 
					u8 *bytes, size_t size)
{
	int ret = 0;

	ret = rom_lock(adapter);
	if (ret < 0)
		return ret;

	ret = do_rom_fast_write_words(adapter, addr, bytes, size);
	netxen_rom_unlock(adapter);

	return ret;
}

static int netxen_rom_wrsr(struct netxen_adapter *adapter, int data)
{
	int ret;

	ret = netxen_rom_wren(adapter);
	if (ret < 0)
		return ret;

	netxen_crb_writelit_adapter(adapter, NETXEN_ROMUSB_ROM_WDATA, data);
	netxen_crb_writelit_adapter(adapter, 
					NETXEN_ROMUSB_ROM_INSTR_OPCODE, 0x1);

	ret = netxen_wait_rom_done(adapter);
	if (ret < 0)
		return ret;

	return netxen_rom_wip_poll(adapter);
}

static int netxen_rom_rdsr(struct netxen_adapter *adapter)
{
	int ret;

	ret = rom_lock(adapter);
	if (ret < 0)
		return ret;

	ret = netxen_do_rom_rdsr(adapter);
	netxen_rom_unlock(adapter);
	return ret;
}

int netxen_backup_crbinit(struct netxen_adapter *adapter)
{
	int ret = FLASH_SUCCESS;
	int val;
	char *buffer = kmalloc(NETXEN_FLASH_SECTOR_SIZE, GFP_KERNEL);

	if (!buffer)
		return -ENOMEM;	
	/* unlock sector 63 */
	val = netxen_rom_rdsr(adapter);
	val = val & 0xe3;
	ret = netxen_rom_wrsr(adapter, val);
	if (ret != FLASH_SUCCESS)
		goto out_kfree;

	ret = netxen_rom_wip_poll(adapter);
	if (ret != FLASH_SUCCESS)
		goto out_kfree;

	/* copy  sector 0 to sector 63 */
	ret = netxen_rom_fast_read_words(adapter, NETXEN_CRBINIT_START, 
					buffer, NETXEN_FLASH_SECTOR_SIZE);
	if (ret != FLASH_SUCCESS)
		goto out_kfree;

	ret = netxen_rom_fast_write_words(adapter, NETXEN_FIXED_START, 
					buffer, NETXEN_FLASH_SECTOR_SIZE);
	if (ret != FLASH_SUCCESS)
		goto out_kfree;

	/* lock sector 63 */
	val = netxen_rom_rdsr(adapter);
	if (!(val & 0x8)) {
		val |= (0x1 << 2);
		/* lock sector 63 */
		if (netxen_rom_wrsr(adapter, val) == 0) {
			ret = netxen_rom_wip_poll(adapter);
			if (ret != FLASH_SUCCESS)
				goto out_kfree;

			/* lock SR writes */
			ret = netxen_rom_wip_poll(adapter);
			if (ret != FLASH_SUCCESS)
				goto out_kfree;
		}
	}

out_kfree:
	kfree(buffer);
	return ret;
}

static int netxen_do_rom_se(struct netxen_adapter *adapter, int addr)
{
	netxen_rom_wren(adapter);
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE,
			     M25P_INSTR_SE);
	if (netxen_wait_rom_done(adapter)) {
		netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
		return -1;
	}
	return netxen_rom_wip_poll(adapter);
}

static void check_erased_flash(struct netxen_adapter *adapter, int addr)
{
	int i;
	int val;
	int count = 0, erased_errors = 0;
	int range;

	range = (addr == NETXEN_USER_START) ? 
		NETXEN_FIXED_START : addr + NETXEN_FLASH_SECTOR_SIZE;
	
	for (i = addr; i < range; i += 4) {
		netxen_rom_fast_read(adapter, i, &val);
		if (val != 0xffffffff)
			erased_errors++;
		count++;
	}

	if (erased_errors)
		printk(KERN_INFO "0x%x out of 0x%x words fail to be erased "
			"for sector address: %x\n", erased_errors, count, addr);
}

int netxen_rom_se(struct netxen_adapter *adapter, int addr)
{
	int ret = 0;
	if (rom_lock(adapter) != 0) {
		return -1;
	}
	ret = netxen_do_rom_se(adapter, addr);
	netxen_rom_unlock(adapter);
	msleep(30);
	check_erased_flash(adapter, addr);

	return ret;
}

static int netxen_flash_erase_sections(struct netxen_adapter *adapter,
				       int start, int end)
{
	int ret = FLASH_SUCCESS;
	int i;

	for (i = start; i < end; i++) {
		ret = netxen_rom_se(adapter, i * NETXEN_FLASH_SECTOR_SIZE);
		if (ret)
			break;
		ret = netxen_rom_wip_poll(adapter);
		if (ret < 0)
			return ret;
	}

	return ret;
}

int
netxen_flash_erase_secondary(struct netxen_adapter *adapter)
{
	int ret = FLASH_SUCCESS;
	int start, end;

	start = NETXEN_SECONDARY_START / NETXEN_FLASH_SECTOR_SIZE;
	end   = NETXEN_USER_START / NETXEN_FLASH_SECTOR_SIZE;
	ret = netxen_flash_erase_sections(adapter, start, end);

	return ret;
}

int
netxen_flash_erase_primary(struct netxen_adapter *adapter)
{
	int ret = FLASH_SUCCESS;
	int start, end;

	start = NETXEN_PRIMARY_START / NETXEN_FLASH_SECTOR_SIZE;
	end   = NETXEN_SECONDARY_START / NETXEN_FLASH_SECTOR_SIZE;
	ret = netxen_flash_erase_sections(adapter, start, end);

	return ret;
}

void netxen_halt_pegs(struct netxen_adapter *adapter)
{
	 netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_0 + 0x3c, 1);
	 netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_1 + 0x3c, 1);
	 netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_2 + 0x3c, 1);
	 netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_3 + 0x3c, 1);
}

int netxen_flash_unlock(struct netxen_adapter *adapter)
{
	int ret = 0;

	ret = netxen_rom_wrsr(adapter, 0);
	if (ret < 0)
		return ret;

	ret = netxen_rom_wren(adapter);
	if (ret < 0)
		return ret;

	return ret;
}

#define NETXEN_BOARDTYPE		0x4008
#define NETXEN_BOARDNUM 		0x400c
#define NETXEN_CHIPNUM			0x4010
#define NETXEN_ROMBUS_RESET		0xFFFFFFFF
#define NETXEN_ROM_FIRST_BARRIER	0x800000000ULL
#define NETXEN_ROM_FOUND_INIT		0x400

int netxen_pinit_from_rom(struct netxen_adapter *adapter, int verbose)
{
	int addr, val, status;
	int n, i;
	int init_delay = 0;
	struct crb_addr_pair *buf;
	u32 off;

	/* resetall */
	status = netxen_nic_get_board_info(adapter);
	if (status)
		printk("%s: netxen_pinit_from_rom: Error getting board info\n",
		       netxen_nic_driver_name);

	netxen_crb_writelit_adapter(adapter, NETXEN_ROMUSB_GLB_SW_RESET,
				    NETXEN_ROMBUS_RESET);

	if (verbose) {
		int val;
		if (netxen_rom_fast_read(adapter, NETXEN_BOARDTYPE, &val) == 0)
			printk("P2 ROM board type: 0x%08x\n", val);
		else
			printk("Could not read board type\n");
		if (netxen_rom_fast_read(adapter, NETXEN_BOARDNUM, &val) == 0)
			printk("P2 ROM board  num: 0x%08x\n", val);
		else
			printk("Could not read board number\n");
		if (netxen_rom_fast_read(adapter, NETXEN_CHIPNUM, &val) == 0)
			printk("P2 ROM chip   num: 0x%08x\n", val);
		else
			printk("Could not read chip number\n");
	}

	if (netxen_rom_fast_read(adapter, 0, &n) == 0
	    && (n & NETXEN_ROM_FIRST_BARRIER)) {
		n &= ~NETXEN_ROM_ROUNDUP;
		if (n < NETXEN_ROM_FOUND_INIT) {
			if (verbose)
				printk("%s: %d CRB init values found"
				       " in ROM.\n", netxen_nic_driver_name, n);
		} else {
			printk("%s:n=0x%x Error! NetXen card flash not"
			       " initialized.\n", __FUNCTION__, n);
			return -EIO;
		}
		buf = kcalloc(n, sizeof(struct crb_addr_pair), GFP_KERNEL);
		if (buf == NULL) {
			printk("%s: netxen_pinit_from_rom: Unable to calloc "
			       "memory.\n", netxen_nic_driver_name);
			return -ENOMEM;
		}
		for (i = 0; i < n; i++) {
			if (netxen_rom_fast_read(adapter, 8 * i + 4, &val) != 0
			    || netxen_rom_fast_read(adapter, 8 * i + 8,
						    &addr) != 0)
				return -EIO;

			buf[i].addr = addr;
			buf[i].data = val;

			if (verbose)
				printk("%s: PCI:     0x%08x == 0x%08x\n",
				       netxen_nic_driver_name, (unsigned int)
				       netxen_decode_crb_addr(addr), val);
		}
		for (i = 0; i < n; i++) {

			off = netxen_decode_crb_addr(buf[i].addr);
			if (off == NETXEN_ADDR_ERROR) {
				printk(KERN_ERR"CRB init value out of range %x\n",
					buf[i].addr);
				continue;
			}
			off += NETXEN_PCI_CRBSPACE;
			/* skipping cold reboot MAGIC */
			if (off == NETXEN_CAM_RAM(0x1fc))
				continue;

			/* After writing this register, HW needs time for CRB */
			/* to quiet down (else crb_window returns 0xffffffff) */
			if (off == NETXEN_ROMUSB_GLB_SW_RESET) {
				init_delay = 1;
				/* hold xdma in reset also */
				buf[i].data = NETXEN_NIC_XDMA_RESET;
			}

			if (ADDR_IN_WINDOW1(off)) {
				writel(buf[i].data,
				       NETXEN_CRB_NORMALIZE(adapter, off));
			} else {
				netxen_nic_pci_change_crbwindow(adapter, 0);
				writel(buf[i].data,
				       pci_base_offset(adapter, off));

				netxen_nic_pci_change_crbwindow(adapter, 1);
			}
			if (init_delay == 1) {
				msleep(2000);
				init_delay = 0;
			}
			msleep(20);
		}
		kfree(buf);

		/* disable_peg_cache_all */

		/* unreset_net_cache */
		netxen_nic_hw_read_wx(adapter, NETXEN_ROMUSB_GLB_SW_RESET, &val,
				      4);
		netxen_crb_writelit_adapter(adapter, NETXEN_ROMUSB_GLB_SW_RESET,
					    (val & 0xffffff0f));
		/* p2dn replyCount */
		netxen_crb_writelit_adapter(adapter,
					    NETXEN_CRB_PEG_NET_D + 0xec, 0x1e);
		/* disable_peg_cache 0 */
		netxen_crb_writelit_adapter(adapter,
					    NETXEN_CRB_PEG_NET_D + 0x4c, 8);
		/* disable_peg_cache 1 */
		netxen_crb_writelit_adapter(adapter,
					    NETXEN_CRB_PEG_NET_I + 0x4c, 8);

		/* peg_clr_all */

		/* peg_clr 0 */
		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_0 + 0x8,
					    0);
		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_0 + 0xc,
					    0);
		/* peg_clr 1 */
		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_1 + 0x8,
					    0);
		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_1 + 0xc,
					    0);
		/* peg_clr 2 */
		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_2 + 0x8,
					    0);
		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_2 + 0xc,
					    0);
		/* peg_clr 3 */
		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_3 + 0x8,
					    0);
		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_3 + 0xc,
					    0);
	}
	return 0;
}

int netxen_initialize_adapter_offload(struct netxen_adapter *adapter)
{
	uint64_t addr;
	uint32_t hi;
	uint32_t lo;

	adapter->dummy_dma.addr =
	    pci_alloc_consistent(adapter->ahw.pdev,
				 NETXEN_HOST_DUMMY_DMA_SIZE,
				 &adapter->dummy_dma.phys_addr);
	if (adapter->dummy_dma.addr == NULL) {
		printk("%s: ERROR: Could not allocate dummy DMA memory\n",
		       __FUNCTION__);
		return -ENOMEM;
	}

	addr = (uint64_t) adapter->dummy_dma.phys_addr;
	hi = (addr >> 32) & 0xffffffff;
	lo = addr & 0xffffffff;

	writel(hi, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_DUMMY_BUF_ADDR_HI));
	writel(lo, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_DUMMY_BUF_ADDR_LO));

	return 0;
}

void netxen_free_adapter_offload(struct netxen_adapter *adapter)
{
	if (adapter->dummy_dma.addr) {
		pci_free_consistent(adapter->ahw.pdev,
				    NETXEN_HOST_DUMMY_DMA_SIZE,
				    adapter->dummy_dma.addr,
				    adapter->dummy_dma.phys_addr);
		adapter->dummy_dma.addr = NULL;
	}
}

int netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val)
{
	u32 val = 0;
	int retries = 30;

	if (!pegtune_val) {
		do {
			val = readl(NETXEN_CRB_NORMALIZE
				  (adapter, CRB_CMDPEG_STATE));
			pegtune_val = readl(NETXEN_CRB_NORMALIZE
				  (adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));

			if (val == PHAN_INITIALIZE_COMPLETE ||
				val == PHAN_INITIALIZE_ACK)
				return 0;

			msleep(1000);
		} while (--retries);
		if (!retries) {
			printk(KERN_WARNING "netxen_phantom_init: init failed, "
					"pegtune_val=%x\n", pegtune_val);
			return -1;
		}
	}

	return 0;
}

int netxen_nic_rx_has_work(struct netxen_adapter *adapter)
{
	int ctx;

	for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
		struct netxen_recv_context *recv_ctx =
		    &(adapter->recv_ctx[ctx]);
		u32 consumer;
		struct status_desc *desc_head;
		struct status_desc *desc;

		consumer = recv_ctx->status_rx_consumer;
		desc_head = recv_ctx->rcv_status_desc_head;
		desc = &desc_head[consumer];

		if (netxen_get_sts_owner(desc) & STATUS_OWNER_HOST)
			return 1;
	}

	return 0;
}

static int netxen_nic_check_temp(struct netxen_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;