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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 inline 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);
}

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.
 */
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 inline 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;
}

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

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

}

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 inline 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 inline 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 inline 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;
}

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;
}

static inline 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;
}

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);
}

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;
}

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);
}

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;
}

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 inline 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 = readl(NETXEN_CRB_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;
}

void netxen_watchdog_task(struct work_struct *work)
{
      struct net_device *netdev;
      struct netxen_adapter *adapter =
            container_of(work, struct netxen_adapter, watchdog_task);

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

      if (adapter->handle_phy_intr)
            adapter->handle_phy_intr(adapter);

      netdev = adapter->netdev;
      if ((netif_running(netdev)) && !netif_carrier_ok(netdev) &&
                  netxen_nic_link_ok(adapter) ) {
            printk(KERN_INFO "%s %s (port %d), Link is up\n",
                         netxen_nic_driver_name, netdev->name, adapter->portnum);
            netif_carrier_on(netdev);
            netif_wake_queue(netdev);
      } else if(!(netif_running(netdev)) && netif_carrier_ok(netdev)) {
            printk(KERN_ERR "%s %s Link is Down\n",
                        netxen_nic_driver_name, netdev->name);
            netif_carrier_off(netdev);
            netif_stop_queue(netdev);
      }

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

/*
 * netxen_process_rcv() send the received packet to the protocol stack.
 * and if the number of receives exceeds RX_BUFFERS_REFILL, then we
 * invoke the routine to send more rx buffers to the Phantom...
 */
void
netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
               struct status_desc *desc)
{
      struct pci_dev *pdev = adapter->pdev;
      struct net_device *netdev = adapter->netdev;
      u64 sts_data = le64_to_cpu(desc->status_desc_data);
      int index = netxen_get_sts_refhandle(sts_data);
      struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctxid]);
      struct netxen_rx_buffer *buffer;
      struct sk_buff *skb;
      u32 length = netxen_get_sts_totallength(sts_data);
      u32 desc_ctx;
      struct netxen_rcv_desc_ctx *rcv_desc;
      int ret;

      desc_ctx = netxen_get_sts_type(sts_data);
      if (unlikely(desc_ctx >= NUM_RCV_DESC_RINGS)) {
            printk("%s: %s Bad Rcv descriptor ring\n",
                   netxen_nic_driver_name, netdev->name);
            return;
      }

      rcv_desc = &recv_ctx->rcv_desc[desc_ctx];
      if (unlikely(index > rcv_desc->max_rx_desc_count)) {
            DPRINTK(ERR, "Got a buffer index:%x Max is %x\n",
                  index, rcv_desc->max_rx_desc_count);
            return;
      }
      buffer = &rcv_desc->rx_buf_arr[index];
      if (desc_ctx == RCV_DESC_LRO_CTXID) {
            buffer->lro_current_frags++;
            if (netxen_get_sts_desc_lro_last_frag(desc)) {
                  buffer->lro_expected_frags =
                      netxen_get_sts_desc_lro_cnt(desc);
                  buffer->lro_length = length;
            }
            if (buffer->lro_current_frags != buffer->lro_expected_frags) {
                  if (buffer->lro_expected_frags != 0) {
                        printk("LRO: (refhandle:%x) recv frag."
                               "wait for last. flags: %x expected:%d"
                               "have:%d\n", index,
                               netxen_get_sts_desc_lro_last_frag(desc),
                               buffer->lro_expected_frags,
                               buffer->lro_current_frags);
                  }
                  return;
            }
      }

      pci_unmap_single(pdev, buffer->dma, rcv_desc->dma_size,
                   PCI_DMA_FROMDEVICE);

      skb = (struct sk_buff *)buffer->skb;

      if (likely(adapter->rx_csum &&
                        netxen_get_sts_status(sts_data) == STATUS_CKSUM_OK)) {
            adapter->stats.csummed++;
            skb->ip_summed = CHECKSUM_UNNECESSARY;
      } else
            skb->ip_summed = CHECKSUM_NONE;

      skb->dev = netdev;
      if (desc_ctx == RCV_DESC_LRO_CTXID) {
            /* True length was only available on the last pkt */
            skb_put(skb, buffer->lro_length);
      } else {
            skb_put(skb, length);
      }

      skb->protocol = eth_type_trans(skb, netdev);

      ret = netif_receive_skb(skb);

      /*
       * RH: Do we need these stats on a regular basis. Can we get it from
       * Linux stats.
       */
      switch (ret) {
      case NET_RX_SUCCESS:
            adapter->stats.uphappy++;
            break;

      case NET_RX_CN_LOW:
            adapter->stats.uplcong++;
            break;

      case NET_RX_CN_MOD:
            adapter->stats.upmcong++;
            break;

      case NET_RX_CN_HIGH:
            adapter->stats.uphcong++;
            break;

      case NET_RX_DROP:
            adapter->stats.updropped++;
            break;

      default:
            adapter->stats.updunno++;
            break;
      }

      netdev->last_rx = jiffies;

      rcv_desc->rcv_free++;
      rcv_desc->rcv_pending--;

      /*
       * We just consumed one buffer so post a buffer.
       */
      buffer->skb = NULL;
      buffer->state = NETXEN_BUFFER_FREE;
      buffer->lro_current_frags = 0;
      buffer->lro_expected_frags = 0;

      adapter->stats.no_rcv++;
      adapter->stats.rxbytes += length;
}

/* Process Receive status ring */
u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max)
{
      struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctxid]);
      struct status_desc *desc_head = recv_ctx->rcv_status_desc_head;
      struct status_desc *desc;     /* used to read status desc here */
      u32 consumer = recv_ctx->status_rx_consumer;
      u32 producer = 0;
      int count = 0, ring;

      DPRINTK(INFO, "procesing receive\n");
      /*
       * we assume in this case that there is only one port and that is
       * port #1...changes need to be done in firmware to indicate port
       * number as part of the descriptor. This way we will be able to get
       * the netdev which is associated with that device.
       */
      while (count < max) {
            desc = &desc_head[consumer];
            if (!(netxen_get_sts_owner(desc) & STATUS_OWNER_HOST)) {
                  DPRINTK(ERR, "desc %p ownedby %x\n", desc,
                        netxen_get_sts_owner(desc));
                  break;
            }
            netxen_process_rcv(adapter, ctxid, desc);
            netxen_set_sts_owner(desc, STATUS_OWNER_PHANTOM);
            consumer = (consumer + 1) & (adapter->max_rx_desc_count - 1);
            count++;
      }
      if (count) {
            for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
                  netxen_post_rx_buffers_nodb(adapter, ctxid, ring);
            }
      }

      /* update the consumer index in phantom */
      if (count) {
            recv_ctx->status_rx_consumer = consumer;
            recv_ctx->status_rx_producer = producer;

            /* Window = 1 */
            writel(consumer,
                   NETXEN_CRB_NORMALIZE(adapter,
                                  recv_crb_registers[adapter->portnum].
                                  crb_rcv_status_consumer));
            wmb();
      }

      return count;
}

/* Process Command status ring */
int netxen_process_cmd_ring(unsigned long data)
{
      u32 last_consumer;
      u32 consumer;
      struct netxen_adapter *adapter = (struct netxen_adapter *)data;
      int count1 = 0;
      int count2 = 0;
      struct netxen_cmd_buffer *buffer;
      struct pci_dev *pdev;
      struct netxen_skb_frag *frag;
      u32 i;
      int done;

      spin_lock(&adapter->tx_lock);
      last_consumer = adapter->last_cmd_consumer;
      DPRINTK(INFO, "procesing xmit complete\n");
      /* we assume in this case that there is only one port and that is
       * port #1...changes need to be done in firmware to indicate port
       * number as part of the descriptor. This way we will be able to get
       * the netdev which is associated with that device.
       */

      consumer = le32_to_cpu(*(adapter->cmd_consumer));
      if (last_consumer == consumer) {    /* Ring is empty    */
            DPRINTK(INFO, "last_consumer %d == consumer %d\n",
                  last_consumer, consumer);
            spin_unlock(&adapter->tx_lock);
            return 1;
      }

      adapter->proc_cmd_buf_counter++;
      /*
       * Not needed - does not seem to be used anywhere.
       * adapter->cmd_consumer = consumer;
       */
      spin_unlock(&adapter->tx_lock);

      while ((last_consumer != consumer) && (count1 < MAX_STATUS_HANDLE)) {
            buffer = &adapter->cmd_buf_arr[last_consumer];
            pdev = adapter->pdev;
            if (buffer->skb) {
                  frag = &buffer->frag_array[0];
                  pci_unmap_single(pdev, frag->dma, frag->length,
                               PCI_DMA_TODEVICE);
                  frag->dma = 0ULL;
                  for (i = 1; i < buffer->frag_count; i++) {
                        DPRINTK(INFO, "getting fragment no %d\n", i);
                        frag++;     /* Get the next frag */
                        pci_unmap_page(pdev, frag->dma, frag->length,
                                     PCI_DMA_TODEVICE);
                        frag->dma = 0ULL;
                  }

                  adapter->stats.skbfreed++;
                  dev_kfree_skb_any(buffer->skb);
                  buffer->skb = NULL;
            } else if (adapter->proc_cmd_buf_counter == 1) {
                  adapter->stats.txnullskb++;
            }
            if (unlikely(netif_queue_stopped(adapter->netdev)
                       && netif_carrier_ok(adapter->netdev))
                && ((jiffies - adapter->netdev->trans_start) >
                  adapter->netdev->watchdog_timeo)) {
                  SCHEDULE_WORK(&adapter->tx_timeout_task);
            }

            last_consumer = get_next_index(last_consumer,
                                     adapter->max_tx_desc_count);
            count1++;
      }

      count2 = 0;
      spin_lock(&adapter->tx_lock);
      if ((--adapter->proc_cmd_buf_counter) == 0) {
            adapter->last_cmd_consumer = last_consumer;
            while ((adapter->last_cmd_consumer != consumer)
                   && (count2 < MAX_STATUS_HANDLE)) {
                  buffer =
                      &adapter->cmd_buf_arr[adapter->last_cmd_consumer];
                  count2++;
                  if (buffer->skb)
                        break;
                  else
                        adapter->last_cmd_consumer =
                            get_next_index(adapter->last_cmd_consumer,
                                       adapter->max_tx_desc_count);
            }
      }
      if (count1 || count2) {
            if (netif_queue_stopped(adapter->netdev)
                && (adapter->flags & NETXEN_NETDEV_STATUS)) {
                  netif_wake_queue(adapter->netdev);
                  adapter->flags &= ~NETXEN_NETDEV_STATUS;
            }
      }
      /*
       * If everything is freed up to consumer then check if the ring is full
       * If the ring is full then check if more needs to be freed and
       * schedule the call back again.
       *
       * This happens when there are 2 CPUs. One could be freeing and the
       * other filling it. If the ring is full when we get out of here and
       * the card has already interrupted the host then the host can miss the
       * interrupt.
       *
       * There is still a possible race condition and the host could miss an
       * interrupt. The card has to take care of this.
       */
      if (adapter->last_cmd_consumer == consumer &&
          (((adapter->cmd_producer + 1) %
            adapter->max_tx_desc_count) == adapter->last_cmd_consumer)) {
            consumer = le32_to_cpu(*(adapter->cmd_consumer));
      }
      done = (adapter->last_cmd_consumer == consumer);

      spin_unlock(&adapter->tx_lock);
      DPRINTK(INFO, "last consumer is %d in %s\n", last_consumer,
            __FUNCTION__);
      return (done);
}

/*
 * netxen_post_rx_buffers puts buffer in the Phantom memory
 */
void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx, u32 ringid)
{
      struct pci_dev *pdev = adapter->ahw.pdev;
      struct sk_buff *skb;
      struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctx]);
      struct netxen_rcv_desc_ctx *rcv_desc = NULL;
      uint producer;
      struct rcv_desc *pdesc;
      struct netxen_rx_buffer *buffer;
      int count = 0;
      int index = 0;
      netxen_ctx_msg msg = 0;
      dma_addr_t dma;

      rcv_desc = &recv_ctx->rcv_desc[ringid];

      producer = rcv_desc->producer;
      index = rcv_desc->begin_alloc;
      buffer = &rcv_desc->rx_buf_arr[index];
      /* We can start writing rx descriptors into the phantom memory. */
      while (buffer->state == NETXEN_BUFFER_FREE) {
            skb = dev_alloc_skb(rcv_desc->skb_size);
            if (unlikely(!skb)) {
                  /*
                   * TODO
                   * We need to schedule the posting of buffers to the pegs.
                   */
                  rcv_desc->begin_alloc = index;
                  DPRINTK(ERR, "netxen_post_rx_buffers: "
                        " allocated only %d buffers\n", count);
                  break;
            }

            count++;    /* now there should be no failure */
            pdesc = &rcv_desc->desc_head[producer];

#if defined(XGB_DEBUG)
            *(unsigned long *)(skb->head) = 0xc0debabe;
            if (skb_is_nonlinear(skb)) {
                  printk("Allocated SKB @%p is nonlinear\n");
            }
#endif
            skb_reserve(skb, 2);
            /* This will be setup when we receive the
             * buffer after it has been filled  FSL  TBD TBD
             * skb->dev = netdev;
             */
            dma = pci_map_single(pdev, skb->data, rcv_desc->dma_size,
                             PCI_DMA_FROMDEVICE);
            pdesc->addr_buffer = cpu_to_le64(dma);
            buffer->skb = skb;
            buffer->state = NETXEN_BUFFER_BUSY;
            buffer->dma = dma;
            /* make a rcv descriptor  */
            pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
            pdesc->buffer_length = cpu_to_le32(rcv_desc->dma_size);
            DPRINTK(INFO, "done writing descripter\n");
            producer =
                get_next_index(producer, rcv_desc->max_rx_desc_count);
            index = get_next_index(index, rcv_desc->max_rx_desc_count);
            buffer = &rcv_desc->rx_buf_arr[index];
      }
      /* if we did allocate buffers, then write the count to Phantom */
      if (count) {
            rcv_desc->begin_alloc = index;
            rcv_desc->rcv_pending += count;
            rcv_desc->producer = producer;
            if (rcv_desc->rcv_free >= 32) {
                  rcv_desc->rcv_free = 0;
                  /* Window = 1 */
                  writel((producer - 1) &
                         (rcv_desc->max_rx_desc_count - 1),
                         NETXEN_CRB_NORMALIZE(adapter,
                                        recv_crb_registers[
                                        adapter->portnum].
                                        rcv_desc_crb[ringid].
                                        crb_rcv_producer_offset));
                  /*
                   * Write a doorbell msg to tell phanmon of change in
                   * receive ring producer
                   */
                  netxen_set_msg_peg_id(msg, NETXEN_RCV_PEG_DB_ID);
                  netxen_set_msg_privid(msg);
                  netxen_set_msg_count(msg,
                                   ((producer -
                                     1) & (rcv_desc->
                                         max_rx_desc_count - 1)));
                  netxen_set_msg_ctxid(msg, adapter->portnum);
                  netxen_set_msg_opcode(msg, NETXEN_RCV_PRODUCER(ringid));
                  writel(msg,
                         DB_NORMALIZE(adapter,
                                  NETXEN_RCV_PRODUCER_OFFSET));
                  wmb();
            }
      }
}

void netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter, uint32_t ctx,
                         uint32_t ringid)
{
      struct pci_dev *pdev = adapter->ahw.pdev;
      struct sk_buff *skb;
      struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctx]);
      struct netxen_rcv_desc_ctx *rcv_desc = NULL;
      u32 producer;
      struct rcv_desc *pdesc;
      struct netxen_rx_buffer *buffer;
      int count = 0;
      int index = 0;

      rcv_desc = &recv_ctx->rcv_desc[ringid];

      producer = rcv_desc->producer;
      index = rcv_desc->begin_alloc;
      buffer = &rcv_desc->rx_buf_arr[index];
      /* We can start writing rx descriptors into the phantom memory. */
      while (buffer->state == NETXEN_BUFFER_FREE) {
            skb = dev_alloc_skb(rcv_desc->skb_size);
            if (unlikely(!skb)) {
                  /*
                   * We need to schedule the posting of buffers to the pegs.
                   */
                  rcv_desc->begin_alloc = index;
                  DPRINTK(ERR, "netxen_post_rx_buffers_nodb: "
                        " allocated only %d buffers\n", count);
                  break;
            }
            count++;    /* now there should be no failure */
            pdesc = &rcv_desc->desc_head[producer];
            skb_reserve(skb, 2);
            /* 
             * This will be setup when we receive the
             * buffer after it has been filled
             * skb->dev = netdev;
             */
            buffer->skb = skb;
            buffer->state = NETXEN_BUFFER_BUSY;
            buffer->dma = pci_map_single(pdev, skb->data,
                                   rcv_desc->dma_size,
                                   PCI_DMA_FROMDEVICE);

            /* make a rcv descriptor  */
            pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
            pdesc->buffer_length = cpu_to_le32(rcv_desc->dma_size);
            pdesc->addr_buffer = cpu_to_le64(buffer->dma);
            DPRINTK(INFO, "done writing descripter\n");
            producer =
                get_next_index(producer, rcv_desc->max_rx_desc_count);
            index = get_next_index(index, rcv_desc->max_rx_desc_count);
            buffer = &rcv_desc->rx_buf_arr[index];
      }

      /* if we did allocate buffers, then write the count to Phantom */
      if (count) {
            rcv_desc->begin_alloc = index;
            rcv_desc->rcv_pending += count;
            rcv_desc->producer = producer;
            if (rcv_desc->rcv_free >= 32) {
                  rcv_desc->rcv_free = 0;
                  /* Window = 1 */
                  writel((producer - 1) &
                         (rcv_desc->max_rx_desc_count - 1),
                         NETXEN_CRB_NORMALIZE(adapter,
                                        recv_crb_registers[
                                        adapter->portnum].
                                        rcv_desc_crb[ringid].
                                        crb_rcv_producer_offset));
                  wmb();
            }
      }
}

int netxen_nic_tx_has_work(struct netxen_adapter *adapter)
{
      if (find_diff_among(adapter->last_cmd_consumer,
                      adapter->cmd_producer,
                      adapter->max_tx_desc_count) > 0)
            return 1;

      return 0;
}


void netxen_nic_clear_stats(struct netxen_adapter *adapter)
{
      memset(&adapter->stats, 0, sizeof(adapter->stats));
      return;
}


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