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    Subject[PATCH 3/4] atl1: Main C file for Attansic L1 driver
    From: Jay Cliburn <jacliburn@bellsouth.net>

    This patch contains the main C file for the Attansic L1 gigabit ethernet
    adapter driver.

    Signed-off-by: Jay Cliburn <jacliburn@bellsouth.net>
    ---

    atl1_main.c | 2551
    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    1 file changed, 2551 insertions(+)

    diff --git a/drivers/net/atl1/atl1_main.c b/drivers/net/atl1/atl1_main.c
    new file mode 100644
    index 0000000..167e28c
    --- /dev/null
    +++ b/drivers/net/atl1/atl1_main.c
    @@ -0,0 +1,2551 @@
    +/** atl1_main.c - atl1 driver
    +
    +Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
    +Copyright(c) 2006 Chris Snook <csnook@redhat.com>
    +Copyright(c) 2006 Jay Cliburn <jcliburn@gmail.com>
    +
    +Derived from Intel e1000 driver
    +Copyright(c) 1999 - 2005 Intel Corporation. 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 COPYING.
    +
    +Contact Information:
    +Xiong Huang <xiong_huang@attansic.com>
    +Attansic Technology Corp. 3F 147, Xianzheng 9th Road, Zhubei,
    +Xinzhu 302, TAIWAN, REPUBLIC OF CHINA
    +
    +Chris Snook <csnook@redhat.com>
    +Jay Cliburn <jcliburn@gmail.com>
    +
    +This version is adapted from the Attansic reference driver for
    +inclusion in the Linux kernel. It is currently under heavy development.
    +A very incomplete list of things that need to be dealt with:
    +
    +TODO:
    +le/be annotations (some are done - jkc 20061118)
    +Add more ethtool functions.
    +
    +COMPLETED:
    +Remove MODULE_LICENSE from comment. DONE!
    +Change char decls for at_driver_whatever to static const char. DONE!
    +Use PCI_DEVICE macro instead of pci_device_id at_pci_tbl[]. DONE!
    +Make all local functions private (static). DONE!
    +Don't use C99 types; use kernel types instead (u32, s32, ...). DONE!
    +Where possible, change int32_t to just int. DONE!
    +Get rid of forward declarations by reordering code. DONE!
    +Run through Lindent. DONE!
    +Change to C-style comments. DONE!
    +use 2.6.19 interrupt API - done jkc 20061108
    +use 2.6.19 bool - done jkc 20061110
    +fix includes - done jkc 20061109
    +remove mixed case - done jkc 200621110
    +lots of compat/debug code removal - done jkc 20061111
    +Changed to DMA_{64,32}BIT_MASK - done jkc 20061112
    +Do not use own ethtool ioctl; use ethtool ops instead. - done jkc 20061115
    +SIOCDEVPRIVATE removal (unless we really want this) - done jkc 20061117
    +Code moduleparam directly; no AT_PARAM macro - done jkc 20061118
    +iomem annotations -- done jkc 20061118, needs verification
    +Reduce number of module options; use ethtool - done jkc 20061118
    +likely/unlikely annotations - done jkc 20061118, needs verification
    +Converted/removed all typedefs - done jkc 20061118
    +check with sparse - done jkc 20061118; some uncorrectable warnings remain
    +Remove reboot notifier if possible - done jkc 20061119
    +
    +BUGS:
    +TSO is glacially slow (perhaps one packet per jiffy?)
    +twiddling ring parameters causes an OOPS (sometimes - jkc 20061117)
    +doesn't work under xen (may be a xen/chipset interrupt problem)
    +
    +NEEDS TESTING:
    +VLAN
    +WOL
    +multicast
    +promiscuous mode
    +interrupt coalescing
    +SMP torture testing
    +*/
    +
    +#include <linux/netdevice.h>
    +#include <linux/pci.h>
    +#include <linux/spinlock.h>
    +#include <linux/slab.h>
    +#include <linux/string.h>
    +#include <linux/skbuff.h>
    +#include <linux/etherdevice.h>
    +#include <linux/if_vlan.h>
    +#include <linux/irqreturn.h>
    +#include <linux/workqueue.h>
    +#include <linux/timer.h>
    +#include <linux/jiffies.h>
    +#include <linux/hardirq.h>
    +#include <linux/interrupt.h>
    +#include <linux/irqflags.h>
    +#include <linux/net.h>
    +#include <linux/pm.h>
    +#include <linux/in.h>
    +#include <linux/ip.h>
    +#include <linux/tcp.h>
    +#include <linux/compiler.h>
    +
    +#include <asm/atomic.h>
    +#include <asm/page.h>
    +#include <asm/byteorder.h>
    +#include <asm/system.h>
    +#include <asm/checksum.h>
    +
    +#include "atl1.h"
    +
    +#define RUN_REALTIME 0
    +#define DRV_VERSION "2.0.2"
    +
    +char at_driver_name[] = "atl1";
    +static const char at_driver_string[] = "Attansic(R) L1 Ethernet Network Driver";
    +const char at_driver_version[] = DRV_VERSION;
    +static const char at_copyright[] =
    + "Copyright(c) 2005-2006 Attansic Corporation.";
    +
    +MODULE_AUTHOR
    + ("Attansic Corporation <xiong_huang@attansic.com>, Chris Snook <csnook@redhat.com>, Jay Cliburn <jcliburn@gmail.com>");
    +MODULE_DESCRIPTION("Attansic 1000M Ethernet Network Driver");
    +MODULE_LICENSE("GPL");
    +MODULE_VERSION(DRV_VERSION);
    +
    +/*
    + * at_pci_tbl - PCI Device ID Table
    + */
    +static const struct pci_device_id at_pci_tbl[] = {
    + {PCI_DEVICE(0x1969, 0x1048)},
    + /* required last entry */
    + {0,}
    +};
    +
    +MODULE_DEVICE_TABLE(pci, at_pci_tbl);
    +
    +extern s32 at_read_mac_addr(struct at_hw *hw);
    +extern s32 at_init_hw(struct at_hw *hw);
    +extern s32 at_get_speed_and_duplex(struct at_hw *hw, u16 * speed, u16 * duplex);
    +extern s32 at_set_speed_and_duplex(struct at_hw *hw, u16 speed, u16 duplex);
    +extern u32 at_auto_get_fc(struct at_adapter *adapter, u16 duplex);
    +extern u32 at_hash_mc_addr(struct at_hw *hw, u8 * mc_addr);
    +extern void at_hash_set(struct at_hw *hw, u32 hash_value);
    +extern s32 at_read_phy_reg(struct at_hw *hw, u16 reg_addr, u16 * phy_data);
    +extern s32 at_write_phy_reg(struct at_hw *hw, u32 reg_addr, u16 phy_data);
    +extern s32 at_validate_mdi_setting(struct at_hw *hw);
    +extern void set_mac_addr(struct at_hw *hw);
    +extern int get_permanent_address(struct at_hw *hw);
    +extern s32 at_phy_enter_power_saving(struct at_hw *hw);
    +extern s32 at_reset_hw(struct at_hw *hw);
    +extern void at_check_options(struct at_adapter *adapter);
    +void at_set_ethtool_ops(struct net_device *netdev);
    +
    +/**
    + * at_sw_init - Initialize general software structures (struct at_adapter)
    + * @adapter: board private structure to initialize
    + *
    + * at_sw_init initializes the Adapter private data structure.
    + * Fields are initialized based on PCI device information and
    + * OS network device settings (MTU size).
    + **/
    +static int __devinit at_sw_init(struct at_adapter *adapter)
    +{
    + struct at_hw *hw = &adapter->hw;
    + struct net_device *netdev = adapter->netdev;
    + struct pci_dev *pdev = adapter->pdev;
    +
    + /* PCI config space info */
    + hw->vendor_id = pdev->vendor;
    + hw->device_id = pdev->device;
    + hw->subsystem_vendor_id = pdev->subsystem_vendor;
    + hw->subsystem_id = pdev->subsystem_device;
    +
    + pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
    + pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
    +
    + hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
    + hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
    +
    + adapter->wol = 0;
    +
    + adapter->rx_buffer_len = (hw->max_frame_size + 7) & ~7;
    + adapter->ict = 50000; /* 100ms */
    +
    + adapter->link_speed = SPEED_0; /* hardware init */
    + adapter->link_duplex = FULL_DUPLEX;
    +
    + hw->phy_configured = false;
    + hw->preamble_len = 7;
    + hw->ipgt = 0x60;
    + hw->min_ifg = 0x50;
    + hw->ipgr1 = 0x40;
    + hw->ipgr2 = 0x60;
    + hw->max_retry = 0xf;
    + hw->lcol = 0x37;
    + hw->jam_ipg = 7;
    + hw->rfd_burst = 8;
    + hw->rrd_burst = 8;
    + hw->rfd_fetch_gap = 1;
    + hw->rx_jumbo_th = adapter->rx_buffer_len / 8;
    + hw->rx_jumbo_lkah = 1;
    + hw->rrd_ret_timer = 16;
    + hw->tpd_burst = 4;
    + hw->tpd_fetch_th = 16;
    + hw->txf_burst = 0x100;
    + hw->tx_jumbo_task_th = (hw->max_frame_size + 7) >> 3;
    + hw->tpd_fetch_gap = 1;
    + hw->rcb_value = at_rcb_64;
    + hw->dma_ord = at_dma_ord_enh;
    + hw->dmar_block = at_dma_req_256;
    + hw->dmaw_block = at_dma_req_256;
    + hw->cmb_rrd = 4;
    + hw->cmb_tpd = 4;
    + hw->cmb_rx_timer = 1; /* about 2us */
    + hw->cmb_tx_timer = 1; /* about 2us */
    + hw->smb_timer = 100000; /* about 200ms */
    +
    + atomic_set(&adapter->irq_sem, 0);
    + spin_lock_init(&adapter->stats_lock);
    + spin_lock_init(&adapter->tx_lock);
    + spin_lock_init(&adapter->mb_lock);
    +
    + return 0;
    +}
    +
    +/**
    + * at_setup_mem_resources - allocate Tx / RX descriptor resources
    + * @adapter: board private structure
    + *
    + * Return 0 on success, negative on failure
    + **/
    +s32 at_setup_ring_resources(struct at_adapter * adapter)
    +{
    + struct at_tpd_ring *tpd_ring = &adapter->tpd_ring;
    + struct at_rfd_ring *rfd_ring = &adapter->rfd_ring;
    + struct at_rrd_ring *rrd_ring = &adapter->rrd_ring;
    + struct at_ring_header *ring_header = &adapter->ring_header;
    + struct pci_dev *pdev = adapter->pdev;
    + int size;
    + u8 offset = 0;
    +
    + size = sizeof(struct at_buffer) * (tpd_ring->count + rfd_ring->count);
    + tpd_ring->buffer_info = kmalloc(size, GFP_KERNEL);
    + if (unlikely(!tpd_ring->buffer_info)) {
    + printk(KERN_WARNING "%s: kmalloc failed , size = D%d\n",
    + at_driver_name, size);
    + return -ENOMEM;
    + }
    + rfd_ring->buffer_info =
    + (struct at_buffer *)(tpd_ring->buffer_info + tpd_ring->count);
    +
    + memset(tpd_ring->buffer_info, 0, size);
    +
    + /* real ring DMA buffer */
    + ring_header->size = size = sizeof(struct tx_packet_desc) * tpd_ring->count
    + + sizeof(struct rx_free_desc) * rfd_ring->count
    + + sizeof(struct rx_return_desc) * rrd_ring->count
    + + sizeof(struct coals_msg_block)
    + + sizeof(struct stats_msg_block)
    + + 40; /* "40: for 8 bytes align" huh? -- CHS */
    +
    + ring_header->desc =
    + pci_alloc_consistent(pdev, ring_header->size, &ring_header->dma);
    + if (unlikely(!ring_header->desc)) {
    + kfree(tpd_ring->buffer_info);
    + printk(KERN_WARNING
    + "%s: pci_alloc_consistent failed, size = D%d\n",
    + at_driver_name, size);
    + return -ENOMEM;
    + }
    +
    + if (adapter->pci_using_64) { /* test whether HIDWORD dma buffer is not cross boundary */
    + if (unlikely(((ring_header->dma & 0xffffffff00000000ULL) >> 32)
    + != (((ring_header->dma + size) & 0xffffffff00000000ULL) >>
    + 32))) {
    + kfree(tpd_ring->buffer_info);
    + pci_free_consistent(pdev, ring_header->size,
    + ring_header->desc,
    + ring_header->dma);
    + printk(KERN_DEBUG
    + "%s: memory allocated cross 32bit boundary\n",
    + at_driver_name);
    + return -ENOMEM;
    + }
    + }
    +
    + memset(ring_header->desc, 0, ring_header->size);
    +
    + /* init TPD ring */
    + tpd_ring->dma = ring_header->dma;
    + offset = (tpd_ring->dma & 0x7) ? (8 - (ring_header->dma & 0x7)) : 0;
    + tpd_ring->dma += offset;
    + tpd_ring->desc = (u8 *) ring_header->desc + offset;
    + tpd_ring->size = sizeof(struct tx_packet_desc) * tpd_ring->count;
    + atomic_set(&tpd_ring->next_to_use, 0);
    + atomic_set(&tpd_ring->next_to_clean, 0);
    +
    + /* init RFD ring */
    + rfd_ring->dma = tpd_ring->dma + tpd_ring->size;
    + offset = (rfd_ring->dma & 0x7) ? (8 - (rfd_ring->dma & 0x7)) : 0;
    + rfd_ring->dma += offset;
    + rfd_ring->desc = (u8 *) tpd_ring->desc + (tpd_ring->size + offset);
    + rfd_ring->size = sizeof(struct rx_free_desc) * rfd_ring->count;
    + rfd_ring->next_to_clean = 0;
    + /* rfd_ring->next_to_use = rfd_ring->count - 1; */
    + atomic_set(&rfd_ring->next_to_use, 0);
    +
    + /* init RRD ring */
    + rrd_ring->dma = rfd_ring->dma + rfd_ring->size;
    + offset = (rrd_ring->dma & 0x7) ? (8 - (rrd_ring->dma & 0x7)) : 0;
    + rrd_ring->dma += offset;
    + rrd_ring->desc = (u8 *) rfd_ring->desc + (rfd_ring->size + offset);
    + rrd_ring->size = sizeof(struct rx_return_desc) * rrd_ring->count;
    + rrd_ring->next_to_use = 0;
    + atomic_set(&rrd_ring->next_to_clean, 0);
    +
    + /* init CMB */
    + adapter->cmb.dma = rrd_ring->dma + rrd_ring->size;
    + offset = (adapter->cmb.dma & 0x7) ? (8 - (adapter->cmb.dma & 0x7)) : 0;
    + adapter->cmb.dma += offset;
    + adapter->cmb.cmb =
    + (struct coals_msg_block *) ((u8 *) rrd_ring->desc +
    + (rrd_ring->size + offset));
    +
    + /* init SMB */
    + adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block);
    + offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0;
    + adapter->smb.dma += offset;
    + adapter->smb.smb = (struct stats_msg_block *)
    + ((u8 *) adapter->cmb.cmb + (sizeof(struct coals_msg_block) + offset));
    +
    + return AT_SUCCESS;
    +}
    +
    +/**
    + * at_irq_enable - Enable default interrupt generation settings
    + * @adapter: board private structure
    + **/
    +static inline void at_irq_enable(struct at_adapter *adapter)
    +{
    + if (likely(0 == atomic_dec_and_test(&adapter->irq_sem))) {
    + AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
    + }
    +}
    +
    +static inline void at_clear_phy_int(struct at_adapter *adapter)
    +{
    + u16 phy_data;
    + spin_lock(&adapter->stats_lock);
    + at_read_phy_reg(&adapter->hw, 19, &phy_data);
    + spin_unlock(&adapter->stats_lock);
    +}
    +
    +static void at_inc_smb(struct at_adapter *adapter)
    +{
    + struct stats_msg_block *smb = adapter->smb.smb;
    +
    + /* Fill out the OS statistics structure */
    + adapter->soft_stats.rx_packets += smb->rx_ok;
    + adapter->soft_stats.tx_packets += smb->tx_ok;
    + adapter->soft_stats.rx_bytes += smb->rx_byte_cnt;
    + adapter->soft_stats.tx_bytes += smb->tx_byte_cnt;
    + adapter->soft_stats.multicast += smb->rx_mcast;
    + adapter->soft_stats.collisions += (smb->tx_1_col +
    + smb->tx_2_col * 2 +
    + smb->tx_late_col +
    + smb->tx_abort_col *
    + adapter->hw.max_retry);
    +
    + /* Rx Errors */
    + adapter->soft_stats.rx_errors += (smb->rx_frag +
    + smb->rx_fcs_err +
    + smb->rx_len_err +
    + smb->rx_sz_ov +
    + smb->rx_rxf_ov +
    + smb->rx_rrd_ov + smb->rx_align_err);
    + adapter->soft_stats.rx_fifo_errors += smb->rx_rxf_ov;
    + adapter->soft_stats.rx_length_errors += smb->rx_len_err;
    + adapter->soft_stats.rx_crc_errors += smb->rx_fcs_err;
    + adapter->soft_stats.rx_frame_errors += smb->rx_align_err;
    + adapter->soft_stats.rx_missed_errors += (smb->rx_rrd_ov +
    + smb->rx_rxf_ov);
    +
    + adapter->soft_stats.rx_pause += smb->rx_pause;
    + adapter->soft_stats.rx_rrd_ov += smb->rx_rrd_ov;
    + adapter->soft_stats.rx_trunc += smb->rx_sz_ov;
    +
    + /* Tx Errors */
    + adapter->soft_stats.tx_errors += (smb->tx_late_col +
    + smb->tx_abort_col +
    + smb->tx_underrun + smb->tx_trunc);
    + adapter->soft_stats.tx_fifo_errors += smb->tx_underrun;
    + adapter->soft_stats.tx_aborted_errors += smb->tx_abort_col;
    + adapter->soft_stats.tx_window_errors += smb->tx_late_col;
    +
    + adapter->soft_stats.excecol += smb->tx_abort_col;
    + adapter->soft_stats.deffer += smb->tx_defer;
    + adapter->soft_stats.scc += smb->tx_1_col;
    + adapter->soft_stats.mcc += smb->tx_2_col;
    + adapter->soft_stats.latecol += smb->tx_late_col;
    + adapter->soft_stats.tx_underun += smb->tx_underrun;
    + adapter->soft_stats.tx_trunc += smb->tx_trunc;
    + adapter->soft_stats.tx_pause += smb->tx_pause;
    +
    + adapter->net_stats.rx_packets = adapter->soft_stats.rx_packets;
    + adapter->net_stats.tx_packets = adapter->soft_stats.tx_packets;
    + adapter->net_stats.rx_bytes = adapter->soft_stats.rx_bytes;
    + adapter->net_stats.tx_bytes = adapter->soft_stats.tx_bytes;
    + adapter->net_stats.multicast = adapter->soft_stats.multicast;
    + adapter->net_stats.collisions = adapter->soft_stats.collisions;
    + adapter->net_stats.rx_errors = adapter->soft_stats.rx_errors;
    + adapter->net_stats.rx_over_errors =
    + adapter->soft_stats.rx_missed_errors;
    + adapter->net_stats.rx_length_errors =
    + adapter->soft_stats.rx_length_errors;
    + adapter->net_stats.rx_crc_errors = adapter->soft_stats.rx_crc_errors;
    + adapter->net_stats.rx_frame_errors =
    + adapter->soft_stats.rx_frame_errors;
    + adapter->net_stats.rx_fifo_errors = adapter->soft_stats.rx_fifo_errors;
    + adapter->net_stats.rx_missed_errors =
    + adapter->soft_stats.rx_missed_errors;
    + adapter->net_stats.tx_errors = adapter->soft_stats.tx_errors;
    + adapter->net_stats.tx_fifo_errors = adapter->soft_stats.tx_fifo_errors;
    + adapter->net_stats.tx_aborted_errors =
    + adapter->soft_stats.tx_aborted_errors;
    + adapter->net_stats.tx_window_errors =
    + adapter->soft_stats.tx_window_errors;
    + adapter->net_stats.tx_carrier_errors =
    + adapter->soft_stats.tx_carrier_errors;
    +}
    +
    +static inline void at_rx_checksum(struct at_adapter *adapter,
    + struct rx_return_desc * rrd, struct sk_buff *skb)
    +{
    + skb->ip_summed = CHECKSUM_NONE;
    +
    + if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
    + if (rrd->err_flg & (ERR_FLAG_CRC | ERR_FLAG_TRUNC |
    + ERR_FLAG_CODE | ERR_FLAG_OV)) {
    + adapter->hw_csum_err++;
    + printk(KERN_DEBUG "%s: rx checksum error\n",
    + at_driver_name);
    + return;
    + }
    + }
    +
    + /* not IPv4 */
    + if (!(rrd->pkt_flg & PACKET_FLAG_IPV4)) {
    + /* checksum is invalid, but it's not an IPv4 pkt, so ok */
    + return;
    + }
    +
    + /* IPv4 packet */
    + if (likely(!(rrd->err_flg &
    + (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM)))) {
    + skb->ip_summed = CHECKSUM_UNNECESSARY;
    + adapter->hw_csum_good++;
    + return;
    + }
    +
    + /* IPv4, but hardware think it's checksum is wrong */
    + printk(KERN_DEBUG "%s: hw csum wrong pkt_flag:%x, err_flag:%x\n",
    + at_driver_name, rrd->pkt_flg, rrd->err_flg);
    + skb->ip_summed = CHECKSUM_COMPLETE;
    + skb->csum = htons(rrd->xsz.xsum_sz.rx_chksum);
    + adapter->hw_csum_err++;
    + return;
    +}
    +
    +/**
    + * at_alloc_rx_buffers - Replace used receive buffers
    + * @adapter: address of board private structure
    + **/
    +static u16 at_alloc_rx_buffers(struct at_adapter *adapter)
    +{
    + struct at_rfd_ring *rfd_ring = &adapter->rfd_ring;
    + struct net_device *netdev = adapter->netdev;
    + struct pci_dev *pdev = adapter->pdev;
    + struct page *page;
    + unsigned long offset;
    + struct at_buffer *buffer_info, *next_info;
    + struct sk_buff *skb;
    + u16 num_alloc = 0;
    + u16 rfd_next_to_use, next_next;
    + struct rx_free_desc *rfd_desc;
    +
    + next_next = rfd_next_to_use = (u16) atomic_read(&rfd_ring->next_to_use);
    + if (++next_next == rfd_ring->count)
    + next_next = 0;
    + buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
    + next_info = &rfd_ring->buffer_info[next_next];
    +
    + while (!buffer_info->alloced && !next_info->alloced) {
    + if (NULL != buffer_info->skb) {
    + buffer_info->alloced = 1;
    + goto next;
    + }
    +
    + rfd_desc = AT_RFD_DESC(rfd_ring, rfd_next_to_use);
    +
    + skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
    + if (unlikely(!skb)) { /* Better luck next round */
    + adapter->net_stats.rx_dropped++;
    + break;
    + }
    +
    + /* Make buffer alignment 2 beyond a 16 byte boundary
    + * this will result in a 16 byte aligned IP header after
    + * the 14 byte MAC header is removed */
    + skb_reserve(skb, NET_IP_ALIGN);
    + skb->dev = netdev;
    +
    + buffer_info->alloced = 1;
    + buffer_info->skb = skb;
    + buffer_info->length = (u16) adapter->rx_buffer_len;
    + page = virt_to_page(skb->data);
    + offset = (unsigned long)skb->data & ~PAGE_MASK;
    + buffer_info->dma = pci_map_page(pdev, page, offset,
    + adapter->rx_buffer_len,
    + PCI_DMA_FROMDEVICE);
    + rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
    + rfd_desc->buf_len = cpu_to_le16(adapter->rx_buffer_len);
    + rfd_desc->coalese = 0;
    +
    + next:
    + rfd_next_to_use = next_next;
    + if (unlikely(++next_next == rfd_ring->count))
    + next_next = 0;
    +
    + buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
    + next_info = &rfd_ring->buffer_info[next_next];
    + num_alloc++;
    + }
    +
    + if (0 != num_alloc) {
    + /* Force memory writes to complete before letting h/w
    + * know there are new descriptors to fetch. (Only
    + * applicable for weak-ordered memory model archs,
    + * such as IA-64). */
    + wmb();
    + atomic_set(&rfd_ring->next_to_use, (int)rfd_next_to_use);
    + }
    + return num_alloc;
    +}
    +
    +static void at_intr_rx(struct at_adapter *adapter)
    +{
    + int i, count;
    + u16 length;
    + u16 rrd_next_to_clean;
    + struct at_rfd_ring *rfd_ring = &adapter->rfd_ring;
    + struct at_rrd_ring *rrd_ring = &adapter->rrd_ring;
    + struct at_buffer *buffer_info;
    + struct rx_return_desc *rrd;
    + struct sk_buff *skb;
    +
    + count = 0;
    +
    + rrd_next_to_clean = (u16) atomic_read(&rrd_ring->next_to_clean);
    +
    + while (1) {
    + rrd = AT_RRD_DESC(rrd_ring, rrd_next_to_clean);
    + i = 1;
    + if (likely(rrd->xsz.valid)) { /* packet valid */
    + chk_rrd:
    + /* check rrd status */
    + if (likely(rrd->num_buf == 1)) {
    + goto rrd_ok;
    + }
    +
    + /* rrd seems to be bad */
    + if (unlikely(i-- > 0)) {
    + /* rrd may not be DMAed completely */
    + printk(KERN_DEBUG
    + "%s: RRD may not be DMAed completely\n",
    + at_driver_name);
    + usec_delay(1);
    + goto chk_rrd;
    + }
    + /* bad rrd */
    + printk(KERN_DEBUG "%s: bad RRD\n", at_driver_name);
    + /* see if update RFD index */
    + if (rrd->num_buf > 1) {
    + u16 num_buf;
    + num_buf =
    + (rrd->xsz.xsum_sz.pkt_size +
    + adapter->rx_buffer_len -
    + 1) / adapter->rx_buffer_len;
    + if (rrd->num_buf == num_buf) {
    + /* clean alloc flag for bad rrd */
    + while (rfd_ring->next_to_clean !=
    + (rrd->buf_indx + num_buf)) {
    + rfd_ring->buffer_info[rfd_ring->
    + next_to_clean].alloced = 0;
    + if (++rfd_ring->next_to_clean ==
    + rfd_ring->count) {
    + rfd_ring->
    + next_to_clean = 0;
    + }
    + }
    + }
    + }
    +
    + /* update rrd */
    + rrd->xsz.valid = 0;
    + if (++rrd_next_to_clean == rrd_ring->count)
    + rrd_next_to_clean = 0;
    + count++;
    + continue;
    + } else { /* current rrd still not be updated */
    +
    + break;
    + }
    + rrd_ok:
    + /* printk(KERN_INFO "%s: receving packet\n", at_driver_name); */
    + /* clean alloc flag for bad rrd */
    + while (rfd_ring->next_to_clean != rrd->buf_indx) {
    + rfd_ring->buffer_info[rfd_ring->next_to_clean].alloced =
    + 0;
    + if (++rfd_ring->next_to_clean == rfd_ring->count) {
    + rfd_ring->next_to_clean = 0;
    + }
    + }
    +
    + buffer_info = &rfd_ring->buffer_info[rrd->buf_indx];
    + if (++rfd_ring->next_to_clean == rfd_ring->count) {
    + rfd_ring->next_to_clean = 0;
    + }
    +
    + /* update rrd next to clean */
    + if (++rrd_next_to_clean == rrd_ring->count)
    + rrd_next_to_clean = 0;
    + count++;
    +
    + if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
    + if (!(rrd->err_flg &
    + (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM
    + | ERR_FLAG_LEN))) {
    + /* packet error, don't need upstream */
    + buffer_info->alloced = 0;
    + rrd->xsz.valid = 0;
    + continue;
    + }
    + }
    +
    + /* Good Receive */
    + pci_unmap_page(adapter->pdev, buffer_info->dma,
    + buffer_info->length, PCI_DMA_FROMDEVICE);
    + skb = buffer_info->skb;
    + length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);
    +
    + skb_put(skb, length - ETHERNET_FCS_SIZE);
    +
    + /* Receive Checksum Offload */
    + at_rx_checksum(adapter, rrd, skb);
    + skb->protocol = eth_type_trans(skb, adapter->netdev);
    +
    +#ifdef NETIF_F_HW_VLAN_TX
    + if (adapter->vlgrp && (rrd->pkt_flg & PACKET_FLAG_VLAN_INS)) {
    + u16 vlan_tag = (rrd->vlan_tag >> 4) |
    + ((rrd->vlan_tag & 7) << 13) |
    + ((rrd->vlan_tag & 8) << 9);
    + vlan_hwaccel_rx(skb, adapter->vlgrp, vlan_tag);
    + } else
    +#endif
    + netif_rx(skb);
    +
    + /* let protocol layer free skb */
    + buffer_info->skb = NULL;
    + buffer_info->alloced = 0;
    + rrd->xsz.valid = 0;
    +
    + adapter->netdev->last_rx = jiffies;
    + }
    +
    + atomic_set(&rrd_ring->next_to_clean, rrd_next_to_clean);
    +
    + at_alloc_rx_buffers(adapter);
    +
    + /* update mailbox ? */
    + if (0 != count) {
    + u32 tpd_next_to_use;
    + u32 rfd_next_to_use;
    + u32 rrd_next_to_clean;
    +
    + spin_lock(&adapter->mb_lock);
    +
    + tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
    + rfd_next_to_use =
    + (u32) atomic_read(&adapter->rfd_ring.next_to_use);
    + rrd_next_to_clean =
    + (u32) atomic_read(&adapter->rrd_ring.next_to_clean);
    + AT_WRITE_REG(&adapter->hw, REG_MAILBOX,
    + ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
    + MB_RFD_PROD_INDX_SHIFT) | ((rrd_next_to_clean &
    + MB_RRD_CONS_INDX_MASK)
    + <<
    + MB_RRD_CONS_INDX_SHIFT)
    + | ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
    + MB_TPD_PROD_INDX_SHIFT));
    +
    + spin_unlock(&adapter->mb_lock);
    + }
    +}
    +
    +static void at_intr_tx(struct at_adapter *adapter)
    +{
    + struct at_tpd_ring *tpd_ring = &adapter->tpd_ring;
    + struct at_buffer *buffer_info;
    + u16 sw_tpd_next_to_clean;
    + u16 cmb_tpd_next_to_clean;
    + u8 update = 0;
    +
    + sw_tpd_next_to_clean = (u16) atomic_read(&tpd_ring->next_to_clean);
    + cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);
    +
    + while (cmb_tpd_next_to_clean != sw_tpd_next_to_clean) {
    + struct tx_packet_desc *tpd;
    + update = 1;
    + tpd = AT_TPD_DESC(tpd_ring, sw_tpd_next_to_clean);
    + buffer_info = &tpd_ring->buffer_info[sw_tpd_next_to_clean];
    + if (buffer_info->dma) {
    + pci_unmap_page(adapter->pdev, buffer_info->dma,
    + buffer_info->length, PCI_DMA_TODEVICE);
    + buffer_info->dma = 0;
    + }
    +
    + if (buffer_info->skb) {
    + dev_kfree_skb_irq(buffer_info->skb);
    + buffer_info->skb = NULL;
    + }
    + tpd->buffer_addr = 0;
    + tpd->desc.data = 0;
    +
    + if (++sw_tpd_next_to_clean == tpd_ring->count)
    + sw_tpd_next_to_clean = 0;
    + }
    + atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);
    +
    + if (netif_queue_stopped(adapter->netdev)
    + && netif_carrier_ok(adapter->netdev))
    + netif_wake_queue(adapter->netdev);
    +}
    +
    +static void at_check_for_link(struct at_adapter *adapter)
    +{
    + struct net_device *netdev = adapter->netdev;
    + u16 phy_data = 0;
    +
    + spin_lock(&adapter->stats_lock);
    + adapter->phy_timer_pending = false;
    + at_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
    + at_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
    + spin_unlock(&adapter->stats_lock);
    +
    + /* notify upper layer link down ASAP */
    + if (!(phy_data & BMSR_LSTATUS)) { /* Link Down */
    + if (netif_carrier_ok(netdev)) { /* old link state: Up */
    + printk(KERN_INFO "%s: %s link is down\n",
    + at_driver_name, netdev->name);
    + adapter->link_speed = SPEED_0;
    + netif_carrier_off(netdev);
    + netif_stop_queue(netdev);
    + }
    + }
    + schedule_work(&adapter->link_chg_task);
    +}
    +
    +/**
    + * at_intr - Interrupt Handler
    + * @irq: interrupt number
    + * @data: pointer to a network interface device structure
    + * @pt_regs: CPU registers structure
    + **/
    +static irqreturn_t at_intr(int irq, void *data)
    +{
    + struct at_adapter *adapter = ((struct net_device *)data)->priv;
    + u32 status;
    + u8 update_rx;
    + int max_ints = 10;
    +
    + if (0 == (status = adapter->cmb.cmb->int_stats))
    + return IRQ_NONE;
    +
    + update_rx = 0;
    +
    + do {
    + /* clear CMB interrupt status at once */
    + adapter->cmb.cmb->int_stats = 0;
    +
    + if (status & ISR_GPHY) { /* clear phy status */
    + at_clear_phy_int(adapter);
    + }
    + /* clear ISR status, and Enable CMB DMA/Disable Interrupt */
    + AT_WRITE_REG(&adapter->hw, REG_ISR, status | ISR_DIS_INT);
    +
    + /* check if SMB intr */
    + if (status & ISR_SMB) {
    + at_inc_smb(adapter);
    + }
    +
    + /* check if PCIE PHY Link down */
    + if (status & ISR_PHY_LINKDOWN) {
    + printk(KERN_DEBUG "%s: pcie phy link down %x\n",
    + at_driver_name, status);
    + if (netif_running(adapter->netdev)) { // reset MAC
    + AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
    + schedule_work(&adapter->pcie_dma_to_rst_task);
    + return IRQ_HANDLED;
    + }
    + }
    +
    + /* check if DMA read/write error ? */
    + if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
    + printk(KERN_DEBUG
    + "%s: pcie DMA r/w error (status = 0x%x)\n",
    + at_driver_name, status);
    + /* AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST); */
    + AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
    + schedule_work(&adapter->pcie_dma_to_rst_task);
    + return IRQ_HANDLED;
    + }
    +
    + /* link event */
    + if (status & ISR_GPHY) {
    + adapter->soft_stats.tx_carrier_errors++;
    + at_check_for_link(adapter);
    + }
    +
    + /* transmit event */
    + if (status & ISR_CMB_TX)
    + at_intr_tx(adapter);
    +
    + /* rx exception */
    + if (unlikely(status & (ISR_RXF_OV | ISR_RFD_UNRUN |
    + ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
    + ISR_HOST_RRD_OV | ISR_CMB_RX))) {
    + /* Why is this done twice? */
    + if (status &
    + (ISR_RXF_OV | ISR_RFD_UNRUN | ISR_RRD_OV |
    + ISR_HOST_RFD_UNRUN | ISR_HOST_RRD_OV)) {
    + printk(KERN_INFO
    + "%s: rx exception: status = 0x%x\n",
    + at_driver_name, status);
    + }
    + at_intr_rx(adapter);
    + }
    +
    + if (--max_ints < 0)
    + break;
    +
    + } while ((status = adapter->cmb.cmb->int_stats));
    +
    + /* re-enable Interrupt */
    + AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_SMB | ISR_DIS_DMA);
    + return IRQ_HANDLED;
    +}
    +
    +/**
    + * at_set_multi - Multicast and Promiscuous mode set
    + * @netdev: network interface device structure
    + *
    + * The set_multi entry point is called whenever the multicast address
    + * list or the network interface flags are updated. This routine is
    + * responsible for configuring the hardware for proper multicast,
    + * promiscuous mode, and all-multi behavior.
    + **/
    +static void at_set_multi(struct net_device *netdev)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + struct at_hw *hw = &adapter->hw;
    + struct dev_mc_list *mc_ptr;
    + u32 rctl;
    + u32 hash_value;
    +
    + /* Check for Promiscuous and All Multicast modes */
    + rctl = AT_READ_REG(hw, REG_MAC_CTRL);
    + if (netdev->flags & IFF_PROMISC) {
    + rctl |= MAC_CTRL_PROMIS_EN;
    + } else if (netdev->flags & IFF_ALLMULTI) {
    + rctl |= MAC_CTRL_MC_ALL_EN;
    + rctl &= ~MAC_CTRL_PROMIS_EN;
    + } else {
    + rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
    + }
    +
    + AT_WRITE_REG(hw, REG_MAC_CTRL, rctl);
    +
    + /* clear the old settings from the multicast hash table */
    + AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
    + AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
    +
    + /* compute mc addresses' hash value ,and put it into hash table */
    + for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
    + hash_value = at_hash_mc_addr(hw, mc_ptr->dmi_addr);
    + at_hash_set(hw, hash_value);
    + }
    +}
    +
    +static inline void at_setup_mac_ctrl(struct at_adapter *adapter)
    +{
    + u32 value;
    + struct at_hw *hw = &adapter->hw;
    + struct net_device *netdev = adapter->netdev;
    + /* Config MAC CTRL Register */
    + value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
    + /* duplex */
    + if (FULL_DUPLEX == adapter->link_duplex)
    + value |= MAC_CTRL_DUPLX;
    + /* speed */
    + value |= ((u32) ((SPEED_1000 == adapter->link_speed) ?
    + MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
    + MAC_CTRL_SPEED_SHIFT);
    + /* flow control */
    + value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
    + /* PAD & CRC */
    + value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
    + /* preamble length */
    + value |= (((u32) adapter->hw.preamble_len
    + & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
    + /* vlan */
    + if (adapter->vlgrp)
    + value |= MAC_CTRL_RMV_VLAN;
    + /* rx checksum
    + if (adapter->rx_csum)
    + value |= MAC_CTRL_RX_CHKSUM_EN;
    + */
    + /* filter mode */
    + value |= MAC_CTRL_BC_EN;
    + if (netdev->flags & IFF_PROMISC)
    + value |= MAC_CTRL_PROMIS_EN;
    + else if (netdev->flags & IFF_ALLMULTI)
    + value |= MAC_CTRL_MC_ALL_EN;
    + /* value |= MAC_CTRL_LOOPBACK; */
    + AT_WRITE_REG(hw, REG_MAC_CTRL, value);
    +}
    +
    +static u32 at_check_link(struct at_adapter *adapter)
    +{
    + struct at_hw *hw = &adapter->hw;
    + struct net_device *netdev = adapter->netdev;
    + u32 ret_val;
    + u16 speed, duplex, phy_data;
    + int reconfig = 0;
    +
    + /* MII_BMSR must read twise */
    + at_read_phy_reg(hw, MII_BMSR, &phy_data);
    + at_read_phy_reg(hw, MII_BMSR, &phy_data);
    + if (!(phy_data & BMSR_LSTATUS)) { /* link down */
    + if (netif_carrier_ok(netdev)) { /* old link state: Up */
    + printk(KERN_INFO "%s: link is down\n", at_driver_name);
    + adapter->link_speed = SPEED_0;
    + netif_carrier_off(netdev);
    + netif_stop_queue(netdev);
    + }
    + return AT_SUCCESS;
    + }
    +
    + /* Link Up */
    + ret_val = at_get_speed_and_duplex(hw, &speed, &duplex);
    + if (ret_val)
    + return ret_val;
    +
    + switch (hw->media_type) {
    + case MEDIA_TYPE_1000M_FULL:
    + if (speed != SPEED_1000 || duplex != FULL_DUPLEX)
    + reconfig = 1;
    + break;
    + case MEDIA_TYPE_100M_FULL:
    + if (speed != SPEED_100 || duplex != FULL_DUPLEX)
    + reconfig = 1;
    + break;
    + case MEDIA_TYPE_100M_HALF:
    + if (speed != SPEED_100 || duplex != HALF_DUPLEX)
    + reconfig = 1;
    + break;
    + case MEDIA_TYPE_10M_FULL:
    + if (speed != SPEED_10 || duplex != FULL_DUPLEX)
    + reconfig = 1;
    + break;
    + case MEDIA_TYPE_10M_HALF:
    + if (speed != SPEED_10 || duplex != HALF_DUPLEX)
    + reconfig = 1;
    + break;
    + }
    +
    + /* link result is our setting */
    + if (0 == reconfig) {
    + if (adapter->link_speed != speed
    + || adapter->link_duplex != duplex) {
    + adapter->link_speed = speed;
    + adapter->link_duplex = duplex;
    + at_setup_mac_ctrl(adapter);
    + printk(KERN_INFO "%s: %s link is up %d Mbps %s\n",
    + at_driver_name, netdev->name,
    + adapter->link_speed,
    + adapter->link_duplex ==
    + FULL_DUPLEX ? "full duplex" : "half duplex");
    + }
    + if (!netif_carrier_ok(netdev)) { /* Link down -> Up */
    + netif_carrier_on(netdev);
    + netif_wake_queue(netdev);
    + }
    + return AT_SUCCESS;
    + }
    +
    + /* change orignal link status */
    + if (netif_carrier_ok(netdev)) {
    + adapter->link_speed = SPEED_0;
    + netif_carrier_off(netdev);
    + netif_stop_queue(netdev);
    + }
    +
    + if (hw->media_type != MEDIA_TYPE_AUTO_SENSOR &&
    + hw->media_type != MEDIA_TYPE_1000M_FULL) {
    + switch (hw->media_type) {
    + case MEDIA_TYPE_100M_FULL:
    + phy_data = MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
    + MII_CR_RESET;
    + break;
    + case MEDIA_TYPE_100M_HALF:
    + phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
    + break;
    + case MEDIA_TYPE_10M_FULL:
    + phy_data =
    + MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
    + break;
    + default: /* MEDIA_TYPE_10M_HALF: */
    + phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
    + break;
    + }
    + at_write_phy_reg(hw, MII_BMCR, phy_data);
    + return AT_SUCCESS;
    + }
    +
    + /* auto-neg, insert timer to re-config phy */
    + if (!adapter->phy_timer_pending) {
    + adapter->phy_timer_pending = true;
    + mod_timer(&adapter->phy_config_timer, jiffies + 3 * HZ);
    + }
    +
    + return AT_SUCCESS;
    +}
    +
    +static inline void set_flow_ctrl_old(struct at_adapter *adapter)
    +{
    + u32 hi, lo, value;
    +
    + /* RFD Flow Control */
    + value = adapter->rfd_ring.count;
    + hi = value / 16;
    + if (hi < 2) {
    + hi = 2;
    + }
    + lo = value * 7 / 8;
    +
    + value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
    + ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
    + AT_WRITE_REG(&adapter->hw, REG_RXQ_RXF_PAUSE_THRESH, value);
    +
    + /* RRD Flow Control */
    + value = adapter->rrd_ring.count;
    + lo = value / 16;
    + hi = value * 7 / 8;
    + if (lo < 2) {
    + lo = 2;
    + }
    + value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
    + ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
    + AT_WRITE_REG(&adapter->hw, REG_RXQ_RRD_PAUSE_THRESH, value);
    +}
    +
    +static inline void set_flow_ctrl_new(struct at_hw *hw)
    +{
    + u32 hi, lo, value;
    +
    + /* RXF Flow Control */
    + value = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
    + lo = value / 16;
    + if (lo < 192) {
    + lo = 192;
    + }
    + hi = value * 7 / 8;
    + if (hi < lo) {
    + hi = lo + 16;
    + }
    + value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
    + ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
    + AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, value);
    +
    + /* RRD Flow Control */
    + value = AT_READ_REG(hw, REG_SRAM_RRD_LEN);
    + lo = value / 8;
    + hi = value * 7 / 8;
    + if (lo < 2) {
    + lo = 2;
    + }
    + if (hi < lo) {
    + hi = lo + 3;
    + }
    + value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
    + ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
    + AT_WRITE_REG(hw, REG_RXQ_RRD_PAUSE_THRESH, value);
    +}
    +
    +/**
    + * at_configure - Configure Transmit&Receive Unit after Reset
    + * @adapter: board private structure
    + *
    + * Configure the Tx /Rx unit of the MAC after a reset.
    + **/
    +static u32 at_configure(struct at_adapter *adapter)
    +{
    + struct at_hw *hw = &adapter->hw;
    + u32 value;
    +
    + /* clear interrupt status */
    + AT_WRITE_REG(&adapter->hw, REG_ISR, 0xffffffff);
    +
    + /* set MAC Address */
    + value = (((u32) hw->mac_addr[2]) << 24) |
    + (((u32) hw->mac_addr[3]) << 16) |
    + (((u32) hw->mac_addr[4]) << 8) | (((u32) hw->mac_addr[5]));
    + AT_WRITE_REG(hw, REG_MAC_STA_ADDR, value);
    + value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
    + AT_WRITE_REG(hw, (REG_MAC_STA_ADDR + 4), value);
    +
    + /* tx / rx ring */
    +
    + /* HI base address */
    + AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
    + (u32) ((adapter->tpd_ring.
    + dma & 0xffffffff00000000ULL) >> 32));
    + /* LO base address */
    + AT_WRITE_REG(hw, REG_DESC_RFD_ADDR_LO,
    + (u32) (adapter->rfd_ring.dma & 0x00000000ffffffffULL));
    + AT_WRITE_REG(hw, REG_DESC_RRD_ADDR_LO,
    + (u32) (adapter->rrd_ring.dma & 0x00000000ffffffffULL));
    + AT_WRITE_REG(hw, REG_DESC_TPD_ADDR_LO,
    + (u32) (adapter->tpd_ring.dma & 0x00000000ffffffffULL));
    + AT_WRITE_REG(hw, REG_DESC_CMB_ADDR_LO,
    + (u32) (adapter->cmb.dma & 0x00000000ffffffffULL));
    + AT_WRITE_REG(hw, REG_DESC_SMB_ADDR_LO,
    + (u32) (adapter->smb.dma & 0x00000000ffffffffULL));
    +
    + /* element count */
    + value = adapter->rrd_ring.count;
    + value <<= 16;
    + value += adapter->rfd_ring.count;
    + AT_WRITE_REG(hw, REG_DESC_RFD_RRD_RING_SIZE, value);
    + AT_WRITE_REG(hw, REG_DESC_TPD_RING_SIZE, adapter->tpd_ring.count);
    +
    +/* FIXME: use or remove -- CHS
    + // config SRAM
    + // add RXF 256*8 bytes
    + value = ((2795 + 256) << 16) | 432;
    + AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, value);
    + value = 2364 + 256;
    + AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, value);
    + // sub TXF 256*8 bytes
    + value = (4075 << 16) | (2796 + 256);
    + AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, value);
    + value = 1280 - 256;
    + AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, value);
    +*/
    + /* Load Ptr */
    + AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
    +
    + /* config Mailbox */
    + value = (((u32) atomic_read(&adapter->tpd_ring.next_to_use)
    + & MB_TPD_PROD_INDX_MASK) << MB_TPD_PROD_INDX_SHIFT) |
    + (((u32) atomic_read(&adapter->rrd_ring.next_to_clean)
    + & MB_RRD_CONS_INDX_MASK) << MB_RRD_CONS_INDX_SHIFT) |
    + (((u32) atomic_read(&adapter->rfd_ring.next_to_use)
    + & MB_RFD_PROD_INDX_MASK) << MB_RFD_PROD_INDX_SHIFT);
    + AT_WRITE_REG(hw, REG_MAILBOX, value);
    +
    + /* config IPG/IFG */
    + value = (((u32) hw->ipgt & MAC_IPG_IFG_IPGT_MASK)
    + << MAC_IPG_IFG_IPGT_SHIFT) |
    + (((u32) hw->min_ifg & MAC_IPG_IFG_MIFG_MASK)
    + << MAC_IPG_IFG_MIFG_SHIFT) |
    + (((u32) hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK)
    + << MAC_IPG_IFG_IPGR1_SHIFT) |
    + (((u32) hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK)
    + << MAC_IPG_IFG_IPGR2_SHIFT);
    + AT_WRITE_REG(hw, REG_MAC_IPG_IFG, value);
    +
    + /* config Half-Duplex Control */
    + value = ((u32) hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
    + (((u32) hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK)
    + << MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
    + MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
    + (0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
    + (((u32) hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK)
    + << MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
    + AT_WRITE_REG(hw, REG_MAC_HALF_DUPLX_CTRL, value);
    +
    + /* set Interrupt Moderator Timer */
    + AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, adapter->imt);
    + AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_ITIMER_EN);
    +
    + /* set Interrupt Clear Timer */
    + AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, adapter->ict);
    +
    + /* set MTU, 4 : VLAN */
    + AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + 4);
    +
    + /* jumbo size & rrd retirement timer */
    + value = (((u32) hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK)
    + << RXQ_JMBOSZ_TH_SHIFT) |
    + (((u32) hw->rx_jumbo_lkah & RXQ_JMBO_LKAH_MASK)
    + << RXQ_JMBO_LKAH_SHIFT) |
    + (((u32) hw->rrd_ret_timer & RXQ_RRD_TIMER_MASK)
    + << RXQ_RRD_TIMER_SHIFT);
    + AT_WRITE_REG(hw, REG_RXQ_JMBOSZ_RRDTIM, value);
    +
    + /* Flow Control */
    + switch (hw->dev_rev) {
    + case 0x8001:
    + case 0x9001:
    + case 0x9002:
    + case 0x9003:
    + set_flow_ctrl_old(adapter);
    + break;
    + default:
    + set_flow_ctrl_new(hw);
    + break;
    + }
    +
    + /* config TXQ */
    + value = (((u32) hw->tpd_burst & TXQ_CTRL_TPD_BURST_NUM_MASK)
    + << TXQ_CTRL_TPD_BURST_NUM_SHIFT) |
    + (((u32) hw->txf_burst & TXQ_CTRL_TXF_BURST_NUM_MASK)
    + << TXQ_CTRL_TXF_BURST_NUM_SHIFT) |
    + (((u32) hw->tpd_fetch_th & TXQ_CTRL_TPD_FETCH_TH_MASK)
    + << TXQ_CTRL_TPD_FETCH_TH_SHIFT) | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN;
    + AT_WRITE_REG(hw, REG_TXQ_CTRL, value);
    +
    + /* min tpd fetch gap & tx jumbo packet size threshold for taskoffload */
    + value = (((u32) hw->tx_jumbo_task_th & TX_JUMBO_TASK_TH_MASK)
    + << TX_JUMBO_TASK_TH_SHIFT) |
    + (((u32) hw->tpd_fetch_gap & TX_TPD_MIN_IPG_MASK)
    + << TX_TPD_MIN_IPG_SHIFT);
    + AT_WRITE_REG(hw, REG_TX_JUMBO_TASK_TH_TPD_IPG, value);
    +
    + /* config RXQ */
    + value = (((u32) hw->rfd_burst & RXQ_CTRL_RFD_BURST_NUM_MASK)
    + << RXQ_CTRL_RFD_BURST_NUM_SHIFT) |
    + (((u32) hw->rrd_burst & RXQ_CTRL_RRD_BURST_THRESH_MASK)
    + << RXQ_CTRL_RRD_BURST_THRESH_SHIFT) |
    + (((u32) hw->rfd_fetch_gap & RXQ_CTRL_RFD_PREF_MIN_IPG_MASK)
    + << RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT) |
    + RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
    + AT_WRITE_REG(hw, REG_RXQ_CTRL, value);
    +
    + /* config DMA Engine */
    + value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
    + << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
    + ((((u32) hw->dmaw_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
    + << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
    + DMA_CTRL_DMAR_EN | DMA_CTRL_DMAW_EN;
    + value |= (u32) hw->dma_ord;
    + if (at_rcb_128 == hw->rcb_value)
    + value |= DMA_CTRL_RCB_VALUE;
    + AT_WRITE_REG(hw, REG_DMA_CTRL, value);
    +
    + /* config CMB / SMB */
    + value = hw->cmb_rrd | ((u32) hw->cmb_tpd << 16);
    + AT_WRITE_REG(hw, REG_CMB_WRITE_TH, value);
    + value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
    + AT_WRITE_REG(hw, REG_CMB_WRITE_TIMER, value);
    + AT_WRITE_REG(hw, REG_SMB_TIMER, hw->smb_timer);
    +
    + /* --- enable CMB / SMB */
    + value = CSMB_CTRL_CMB_EN | CSMB_CTRL_SMB_EN;
    + AT_WRITE_REG(hw, REG_CSMB_CTRL, value);
    +
    + value = AT_READ_REG(&adapter->hw, REG_ISR);
    + if (unlikely((value & ISR_PHY_LINKDOWN) != 0)) {
    + value = 1; /* config failed */
    + } else {
    + value = 0;
    + }
    + /* clear all interrupt status */
    + AT_WRITE_REG(&adapter->hw, REG_ISR, 0x3fffffff);
    + AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
    + return value;
    +}
    +
    +/**
    + * at_irq_disable - Mask off interrupt generation on the NIC
    + * @adapter: board private structure
    + **/
    +inline void at_irq_disable(struct at_adapter *adapter)
    +{
    + atomic_inc(&adapter->irq_sem);
    + AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
    + synchronize_irq(adapter->pdev->irq);
    +}
    +
    +#ifdef NETIF_F_HW_VLAN_TX
    +static void at_vlan_rx_register(struct net_device *netdev,
    + struct vlan_group *grp)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + u32 ctrl;
    +
    + at_irq_disable(adapter);
    + adapter->vlgrp = grp;
    +
    + if (grp) {
    + /* enable VLAN tag insert/strip */
    + ctrl = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
    + ctrl |= MAC_CTRL_RMV_VLAN;
    + AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, ctrl);
    + } else {
    + /* disable VLAN tag insert/strip */
    + ctrl = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
    + ctrl &= ~MAC_CTRL_RMV_VLAN;
    + AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, ctrl);
    + }
    +
    + at_irq_enable(adapter);
    +}
    +
    +/** FIXME: justify or remove -- CHS */
    +static void at_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
    +{
    + /* We don't do Vlan filtering */
    + return;
    +}
    +
    +/** FIXME: this looks wrong too -- CHS */
    +static void at_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + at_irq_disable(adapter);
    + if (adapter->vlgrp) {
    + adapter->vlgrp->vlan_devices[vid] = NULL;
    + }
    + at_irq_enable(adapter);
    + /* We don't do Vlan filtering */
    + return;
    +}
    +
    +static void at_restore_vlan(struct at_adapter *adapter)
    +{
    + at_vlan_rx_register(adapter->netdev, adapter->vlgrp);
    + if (adapter->vlgrp) {
    + u16 vid;
    + for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
    + if (!adapter->vlgrp->vlan_devices[vid])
    + continue;
    + at_vlan_rx_add_vid(adapter->netdev, vid);
    + }
    + }
    +}
    +#endif /* NETIF_F_HW_VLAN_TX */
    +
    +static inline u16 tpd_avail(struct at_tpd_ring *tpd_ring)
    +{
    + u16 next_to_clean = (u16) atomic_read(&tpd_ring->next_to_clean);
    + u16 next_to_use = (u16) atomic_read(&tpd_ring->next_to_use);
    + return ((next_to_clean >
    + next_to_use) ? next_to_clean - next_to_use -
    + 1 : tpd_ring->count + next_to_clean - next_to_use - 1);
    +}
    +
    +static inline int at_tso(struct at_adapter *adapter, struct sk_buff *skb,
    + struct tso_param * tso)
    +{
    +#ifdef NETIF_F_TSO
    + u8 ipofst;
    + int err;
    +
    + if (skb_shinfo(skb)->gso_size) {
    + if (skb_header_cloned(skb)) {
    + err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
    + if (unlikely(err))
    + return err;
    + }
    +
    + if (skb->protocol == ntohs(ETH_P_IP)) {
    + skb->nh.iph->tot_len = 0;
    + skb->nh.iph->check = 0;
    + skb->h.th->check =
    + ~csum_tcpudp_magic(skb->nh.iph->saddr,
    + skb->nh.iph->daddr, 0,
    + IPPROTO_TCP, 0);
    + ipofst = skb->nh.raw - skb->data;
    + if (14 != ipofst) /* 802.3 frame */
    + tso->eth_type = 1;
    +
    + tso->iphl = skb->nh.iph->ihl;
    + tso->tcp_hdrlen = skb->h.th->doff << 2;
    + tso->mss = skb_shinfo(skb)->gso_size;
    + tso->ip_chksum = 1;
    + tso->tcp_chksum = 1;
    + tso->segment = 1;
    + return true;
    + }
    + }
    +#endif /* NETIF_F_TSO */
    + return false;
    +}
    +
    +static inline int at_tx_csum(struct at_adapter *adapter, struct sk_buff *skb,
    + struct csum_param * csum)
    +{
    + u8 css, cso;
    +
    + if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
    + cso = skb->h.raw - skb->data;
    + css = (skb->h.raw + skb->csum) - skb->data;
    + if (unlikely(cso & 0x1)) {
    + printk(KERN_DEBUG "%s: payload offset != even number\n",
    + at_driver_name);
    + return -1;
    + }
    + csum->payload_offset = cso;
    + csum->xsum_offset = css;
    + csum->custom_chksum = 1;
    + return true;
    + }
    +
    + return true;
    +}
    +
    +static inline void at_tx_map(struct at_adapter *adapter, struct sk_buff *skb,
    + bool tcp_seg)
    +{
    + struct at_tpd_ring *tpd_ring = &adapter->tpd_ring;
    + struct at_buffer *buffer_info;
    + u16 first_buf_len = skb->len;
    + struct page *page;
    + unsigned long offset;
    + u16 tpd_next_to_use;
    +#ifdef NETIF_F_TSO
    + u16 proto_hdr_len;
    +#endif
    +#ifdef MAX_SKB_FRAGS
    + unsigned int nr_frags;
    + unsigned int f;
    + first_buf_len -= skb->data_len;
    + nr_frags = skb_shinfo(skb)->nr_frags;
    +#endif
    + tpd_next_to_use = (u16) atomic_read(&tpd_ring->next_to_use);
    + buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
    + if (unlikely(buffer_info->skb)) {
    + BUG();
    + }
    + buffer_info->skb = NULL; /* put skb in last TPD */
    +#ifdef NETIF_F_TSO
    + if (tcp_seg) {
    + proto_hdr_len =
    + ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
    + buffer_info->length = proto_hdr_len;
    + page = virt_to_page(skb->data);
    + offset = (unsigned long)skb->data & ~PAGE_MASK;
    + buffer_info->dma = pci_map_page(adapter->pdev, page,
    + offset, proto_hdr_len,
    + PCI_DMA_TODEVICE);
    +
    + if (++tpd_next_to_use == tpd_ring->count)
    + tpd_next_to_use = 0;
    +
    + if (first_buf_len > proto_hdr_len) {
    + u16 len12 = first_buf_len - proto_hdr_len;
    + u16 i, m =
    + (len12 + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
    + for (i = 0; i < m; i++) {
    + buffer_info =
    + &tpd_ring->buffer_info[tpd_next_to_use];
    + buffer_info->skb = NULL;
    + buffer_info->length =
    + (MAX_TX_BUF_LEN >=
    + len12) ? MAX_TX_BUF_LEN : len12;
    + len12 -= buffer_info->length;
    + page =
    + virt_to_page(skb->data +
    + (proto_hdr_len +
    + i * MAX_TX_BUF_LEN));
    + offset =
    + (unsigned long)(skb->data +
    + (proto_hdr_len +
    + i *
    + MAX_TX_BUF_LEN)) &
    + ~PAGE_MASK;
    + buffer_info->dma =
    + pci_map_page(adapter->pdev, page, offset,
    + buffer_info->length,
    + PCI_DMA_TODEVICE);
    + if (++tpd_next_to_use == tpd_ring->count)
    + tpd_next_to_use = 0;
    + }
    + }
    + } else {
    +#endif /* NETIF_F_TSO */
    + buffer_info->length = first_buf_len;
    + page = virt_to_page(skb->data);
    + offset = (unsigned long)skb->data & ~PAGE_MASK;
    + buffer_info->dma = pci_map_page(adapter->pdev, page,
    + offset, first_buf_len,
    + PCI_DMA_TODEVICE);
    + if (++tpd_next_to_use == tpd_ring->count)
    + tpd_next_to_use = 0;
    +#ifdef NETIF_F_TSO
    + }
    +#endif /* NETIF_F_TSO */
    +
    +#ifdef MAX_SKB_FRAGS
    + for (f = 0; f < nr_frags; f++) {
    + struct skb_frag_struct *frag;
    + u16 lenf, i, m;
    +
    + frag = &skb_shinfo(skb)->frags[f];
    + lenf = frag->size;
    +
    + m = (lenf + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
    + for (i = 0; i < m; i++) {
    + buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
    + if (unlikely(buffer_info->skb)) {
    + BUG();
    + }
    + buffer_info->skb = NULL;
    + buffer_info->length =
    + (lenf > MAX_TX_BUF_LEN) ? MAX_TX_BUF_LEN : lenf;
    + lenf -= buffer_info->length;
    + buffer_info->dma =
    + pci_map_page(adapter->pdev, frag->page,
    + frag->page_offset + i * MAX_TX_BUF_LEN,
    + buffer_info->length, PCI_DMA_TODEVICE);
    +
    + if (++tpd_next_to_use == tpd_ring->count)
    + tpd_next_to_use = 0;
    + }
    + }
    +#endif /* MAX_SKB_FRAGS */
    + /* last tpd's buffer-info */
    + buffer_info->skb = skb;
    +}
    +
    +static inline void at_tx_queue(struct at_adapter *adapter, int count,
    + union tpd_descr * descr)
    +{
    + struct at_tpd_ring *tpd_ring = &adapter->tpd_ring;
    + int j;
    + struct at_buffer *buffer_info;
    + struct tx_packet_desc *tpd;
    + u16 tpd_next_to_use = (u16) atomic_read(&tpd_ring->next_to_use);
    +
    + for (j = 0; j < count; j++) {
    + buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
    + tpd = AT_TPD_DESC(&adapter->tpd_ring, tpd_next_to_use);
    + tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
    + tpd->desc.data = descr->data;
    + tpd->desc.csum.buf_len = cpu_to_le16(buffer_info->length);
    +#ifdef NETIF_F_TSO
    + if ((descr->tso.segment) && (0 == j))
    + tpd->desc.tso.hdr_flg = 1;
    +#endif
    + if (j == (count - 1))
    + tpd->desc.csum.eop = 1;
    + if (++tpd_next_to_use == tpd_ring->count)
    + tpd_next_to_use = 0;
    + }
    + /* Force memory writes to complete before letting h/w
    + * know there are new descriptors to fetch. (Only
    + * applicable for weak-ordered memory model archs,
    + * such as IA-64). */
    + wmb();
    +
    + atomic_set(&tpd_ring->next_to_use, (int)tpd_next_to_use);
    +}
    +
    +static inline void at_update_mailbox(struct at_adapter *adapter)
    +{
    + unsigned long flags;
    + u32 tpd_next_to_use;
    + u32 rfd_next_to_use;
    + u32 rrd_next_to_clean;
    +
    + spin_lock_irqsave(&adapter->mb_lock, flags);
    +
    + tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
    + rfd_next_to_use = (u32) atomic_read(&adapter->rfd_ring.next_to_use);
    + rrd_next_to_clean = (u32) atomic_read(&adapter->rrd_ring.next_to_clean);
    +
    + AT_WRITE_REG(&adapter->hw, REG_MAILBOX,
    + ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
    + MB_RFD_PROD_INDX_SHIFT) | ((rrd_next_to_clean &
    + MB_RRD_CONS_INDX_MASK) <<
    + MB_RRD_CONS_INDX_SHIFT) | ((tpd_next_to_use &
    + MB_TPD_PROD_INDX_MASK) <<
    + MB_TPD_PROD_INDX_SHIFT));
    +
    + spin_unlock_irqrestore(&adapter->mb_lock, flags);
    +}
    +
    +static int at_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + unsigned int len = skb->len;
    + unsigned long flags;
    + unsigned int nr_frags = 0;
    + int tso;
    + int count = 1;
    + union tpd_descr param;
    +
    +#ifdef NETIF_F_TSO
    + unsigned int mss = 0;
    +#endif
    +#ifdef MAX_SKB_FRAGS
    + unsigned int f;
    + len -= skb->data_len;
    +#endif
    + if (unlikely(skb->len <= 0)) {
    + dev_kfree_skb_any(skb);
    + return NETDEV_TX_OK;
    + }
    + param.data = 0;
    +#ifdef MAX_SKB_FRAGS
    + nr_frags = skb_shinfo(skb)->nr_frags;
    + for (f = 0; f < nr_frags; f++) {
    + u16 fg_size = skb_shinfo(skb)->frags[f].size;
    + if (fg_size) {
    + count +=
    + (fg_size + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
    + }
    + }
    +#endif /* MAX_SKB_FRAGS */
    +#ifdef NETIF_F_TSO
    + mss = skb_shinfo(skb)->gso_size;
    + /* first buffer must be large(or equal) than protocol header length. */
    + if (mss) {
    + unsigned int proto_hdr_len;
    + if (skb->protocol == ntohs(ETH_P_IP)) {
    + proto_hdr_len =
    + ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
    + if (unlikely(proto_hdr_len > len)) {
    + printk(KERN_WARNING
    + "%s: protocol header length = 0x%x, buffer header length = 0x%x\n", at_driver_name, proto_hdr_len, len);
    + dev_kfree_skb_any(skb);
    + return NETDEV_TX_OK;
    + }
    + /* need additional TPD ? */
    + if (proto_hdr_len != len) {
    + count +=
    + (len - proto_hdr_len + MAX_TX_BUF_LEN -
    + 1) / MAX_TX_BUF_LEN;
    + }
    + }
    + }
    +#endif /* NETIF_F_TSO */
    +#ifdef NETIF_F_LLTX
    + local_irq_save(flags);
    + if (!spin_trylock(&adapter->tx_lock)) {
    + /* Collision - tell upper layer to requeue */
    + local_irq_restore(flags);
    + return NETDEV_TX_LOCKED;
    + }
    +#else
    + spin_lock_irqsave(&adapter->tx_lock, flags);
    +#endif
    + if (tpd_avail(&adapter->tpd_ring) < count) {
    + /* no enough descriptor */
    + netif_stop_queue(netdev);
    + spin_unlock_irqrestore(&adapter->tx_lock, flags);
    + return NETDEV_TX_BUSY;
    + }
    +#ifndef NETIF_F_LLTX
    + spin_unlock_irqrestore(&adapter->tx_lock, flags);
    +#endif
    + param.data = 0;
    +#ifdef NETIF_F_HW_VLAN_TX
    + if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
    + u16 vlan_tag = vlan_tx_tag_get(skb);
    + vlan_tag =
    + (vlan_tag << 4) | (vlan_tag >> 13) | ((vlan_tag >> 9) &
    + 0x8);
    + param.csum.ins_vlag = 1;
    + param.csum.valan_tag = vlan_tag;
    + }
    +#endif
    + tso = at_tso(adapter, skb, &param.tso);
    + if (tso < 0) {
    +#ifdef NETIF_F_LLTX
    + spin_unlock_irqrestore(&adapter->tx_lock, flags);
    +#endif
    + dev_kfree_skb_any(skb);
    + return NETDEV_TX_OK;
    + }
    +
    + if (!tso) {
    + if (at_tx_csum(adapter, skb, &param.csum) < 0) {
    + spin_unlock_irqrestore(&adapter->tx_lock, flags);
    + dev_kfree_skb_any(skb);
    + return NETDEV_TX_OK;
    + }
    + }
    +
    + at_tx_map(adapter, skb, 1 == param.csum.segment);
    + at_tx_queue(adapter, count, &param);
    +
    + netdev->trans_start = jiffies;
    +#ifdef NETIF_F_LLTX
    + spin_unlock_irqrestore(&adapter->tx_lock, flags);
    +#endif
    + /* update mailbox */
    + at_update_mailbox(adapter);
    +
    + return NETDEV_TX_OK;
    +}
    +
    +/**
    + * at_get_stats - Get System Network Statistics
    + * @netdev: network interface device structure
    + *
    + * Returns the address of the device statistics structure.
    + * The statistics are actually updated from the timer callback.
    + **/
    +static struct net_device_stats *at_get_stats(struct net_device *netdev)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + return &adapter->net_stats;
    +}
    +
    +/**
    + * at_clean_rx_ring - Free RFD Buffers
    + * @adapter: board private structure
    + **/
    +static void at_clean_rx_ring(struct at_adapter *adapter)
    +{
    + struct at_rfd_ring *rfd_ring = &adapter->rfd_ring;
    + struct at_rrd_ring *rrd_ring = &adapter->rrd_ring;
    + struct at_buffer *buffer_info;
    + struct pci_dev *pdev = adapter->pdev;
    + unsigned long size;
    + unsigned int i;
    +
    + /* Free all the Rx ring sk_buffs */
    + for (i = 0; i < rfd_ring->count; i++) {
    + buffer_info = &rfd_ring->buffer_info[i];
    + if (buffer_info->dma) {
    + pci_unmap_page(pdev,
    + buffer_info->dma,
    + buffer_info->length,
    + PCI_DMA_FROMDEVICE);
    + buffer_info->dma = 0;
    + }
    + if (buffer_info->skb) {
    + dev_kfree_skb(buffer_info->skb);
    + buffer_info->skb = NULL;
    + }
    + }
    +
    + size = sizeof(struct at_buffer) * rfd_ring->count;
    + memset(rfd_ring->buffer_info, 0, size);
    +
    + /* Zero out the descriptor ring */
    + memset(rfd_ring->desc, 0, rfd_ring->size);
    +
    + rfd_ring->next_to_clean = 0;
    + atomic_set(&rfd_ring->next_to_use, 0);
    +
    + rrd_ring->next_to_use = 0;
    + atomic_set(&rrd_ring->next_to_clean, 0);
    +}
    +
    +/**
    + * at_clean_tx_ring - Free Tx Buffers
    + * @adapter: board private structure
    + **/
    +static void at_clean_tx_ring(struct at_adapter *adapter)
    +{
    + struct at_tpd_ring *tpd_ring = &adapter->tpd_ring;
    + struct at_buffer *buffer_info;
    + struct pci_dev *pdev = adapter->pdev;
    + unsigned long size;
    + unsigned int i;
    +
    + /* Free all the Tx ring sk_buffs */
    + for (i = 0; i < tpd_ring->count; i++) {
    + buffer_info = &tpd_ring->buffer_info[i];
    + if (buffer_info->dma) {
    + pci_unmap_page(pdev, buffer_info->dma,
    + buffer_info->length, PCI_DMA_TODEVICE);
    + buffer_info->dma = 0;
    + }
    + }
    +
    + for (i = 0; i < tpd_ring->count; i++) {
    + buffer_info = &tpd_ring->buffer_info[i];
    + if (buffer_info->skb) {
    + dev_kfree_skb_any(buffer_info->skb);
    + buffer_info->skb = NULL;
    + }
    + }
    +
    + size = sizeof(struct at_buffer) * tpd_ring->count;
    + memset(tpd_ring->buffer_info, 0, size);
    +
    + /* Zero out the descriptor ring */
    + memset(tpd_ring->desc, 0, tpd_ring->size);
    +
    + atomic_set(&tpd_ring->next_to_use, 0);
    + atomic_set(&tpd_ring->next_to_clean, 0);
    +}
    +
    +/**
    + * at_free_ring_resources - Free Tx / RX descriptor Resources
    + * @adapter: board private structure
    + *
    + * Free all transmit software resources
    + **/
    +void at_free_ring_resources(struct at_adapter *adapter)
    +{
    + struct pci_dev *pdev = adapter->pdev;
    + struct at_tpd_ring *tpd_ring = &adapter->tpd_ring;
    + struct at_rfd_ring *rfd_ring = &adapter->rfd_ring;
    + struct at_rrd_ring *rrd_ring = &adapter->rrd_ring;
    + struct at_ring_header *ring_header = &adapter->ring_header;
    +
    + at_clean_tx_ring(adapter);
    + at_clean_rx_ring(adapter);
    +
    + kfree(tpd_ring->buffer_info);
    + pci_free_consistent(pdev, ring_header->size, ring_header->desc,
    + ring_header->dma);
    +
    + tpd_ring->buffer_info = NULL;
    + tpd_ring->desc = NULL;
    + tpd_ring->dma = 0;
    +
    + rfd_ring->buffer_info = NULL;
    + rfd_ring->desc = NULL;
    + rfd_ring->dma = 0;
    +
    + rrd_ring->desc = NULL;
    + rrd_ring->dma = 0;
    +}
    +
    +s32 at_up(struct at_adapter *adapter)
    +{
    + struct net_device *netdev = adapter->netdev;
    + int err;
    +
    + /* hardware has been reset, we need to reload some things */
    + at_set_multi(netdev);
    +#ifdef NETIF_F_HW_VLAN_TX
    + at_restore_vlan(adapter);
    +#endif
    + err = at_alloc_rx_buffers(adapter);
    + if (unlikely(0 == err)) /* no RX BUFFER allocated */
    + return -ENOMEM;
    +
    + if (unlikely(at_configure(adapter))) {
    + err = -EIO;
    + goto err_up;
    + }
    +
    + if (unlikely((err = request_irq(adapter->pdev->irq, &at_intr,
    + IRQF_SHARED | IRQF_SAMPLE_RANDOM, netdev->name,
    + netdev))))
    + goto err_up;
    +
    + mod_timer(&adapter->watchdog_timer, jiffies);
    + at_irq_enable(adapter);
    + at_check_link(adapter);
    + return 0;
    +
    + /* FIXME: unreachable code! -- CHS */
    + /* free irq disable any interrupt */
    + AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
    + free_irq(adapter->pdev->irq, netdev);
    +
    + err_up:
    + /* free rx_buffers */
    + at_clean_rx_ring(adapter);
    + return err;
    +}
    +
    +void at_down(struct at_adapter *adapter)
    +{
    + struct net_device *netdev = adapter->netdev;
    +
    + del_timer_sync(&adapter->watchdog_timer);
    + del_timer_sync(&adapter->phy_config_timer);
    + adapter->phy_timer_pending = false;
    +
    + at_irq_disable(adapter);
    + free_irq(adapter->pdev->irq, netdev);
    + at_reset_hw(&adapter->hw);
    + adapter->cmb.cmb->int_stats = 0;
    +
    + adapter->link_speed = SPEED_0;
    + adapter->link_duplex = -1;
    + netif_carrier_off(netdev);
    + netif_stop_queue(netdev);
    +
    + at_clean_tx_ring(adapter);
    + at_clean_rx_ring(adapter);
    +}
    +
    +/**
    + * at_change_mtu - Change the Maximum Transfer Unit
    + * @netdev: network interface device structure
    + * @new_mtu: new value for maximum frame size
    + *
    + * Returns 0 on success, negative on failure
    + **/
    +static int at_change_mtu(struct net_device *netdev, int new_mtu)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + int old_mtu = netdev->mtu;
    + int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
    +
    + if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
    + (max_frame > MAX_JUMBO_FRAME_SIZE)) {
    + printk(KERN_WARNING "%s: invalid MTU setting\n", at_driver_name);
    + return -EINVAL;
    + }
    +
    + adapter->hw.max_frame_size = max_frame;
    + adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
    + adapter->rx_buffer_len = (max_frame + 7) & ~7;
    + adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
    +
    + netdev->mtu = new_mtu;
    + if ((old_mtu != new_mtu) && netif_running(netdev)) {
    + at_down(adapter);
    + at_up(adapter);
    + }
    +
    + return 0;
    +}
    +
    +/**
    + * at_set_mac - Change the Ethernet Address of the NIC
    + * @netdev: network interface device structure
    + * @p: pointer to an address structure
    + *
    + * Returns 0 on success, negative on failure
    + **/
    +static int at_set_mac(struct net_device *netdev, void *p)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + struct sockaddr *addr = p;
    +
    + if (netif_running(netdev))
    + return -EBUSY;
    +
    + if (!is_valid_ether_addr(addr->sa_data))
    + return -EADDRNOTAVAIL;
    +
    + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
    + memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
    +
    + set_mac_addr(&adapter->hw);
    + return 0;
    +}
    +
    +/**
    + * at_watchdog - Timer Call-back
    + * @data: pointer to netdev cast into an unsigned long
    + **/
    +static void at_watchdog(unsigned long data)
    +{
    + struct at_adapter *adapter = (struct at_adapter *)data;
    +
    + /* Reset the timer */
    + mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
    +}
    +
    +#ifdef SIOCGMIIPHY
    +/**
    + * at_mii_ioctl -
    + * @netdev:
    + * @ifreq:
    + * @cmd:
    + **/
    +static int at_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    +/* struct mii_ioctl_data *data = (struct mii_ioctl_data *)&ifr->ifr_data;*/
    + struct mii_ioctl_data *data = if_mii(ifr);
    + unsigned long flags;
    +
    + switch (cmd) {
    + case SIOCGMIIPHY:
    + data->phy_id = 0;
    + break;
    + case SIOCGMIIREG:
    + if (!capable(CAP_NET_ADMIN))
    + return -EPERM;
    + spin_lock_irqsave(&adapter->stats_lock, flags);
    + if (at_read_phy_reg
    + (&adapter->hw, data->reg_num & 0x1F, &data->val_out)) {
    + spin_unlock_irqrestore(&adapter->stats_lock, flags);
    + return -EIO;
    + }
    + spin_unlock_irqrestore(&adapter->stats_lock, flags);
    + break;
    + case SIOCSMIIREG:
    + if (!capable(CAP_NET_ADMIN))
    + return -EPERM;
    + if (data->reg_num & ~(0x1F))
    + return -EFAULT;
    + spin_lock_irqsave(&adapter->stats_lock, flags);
    + printk(KERN_DEBUG "%s: at_mii_ioctl write %x %x\n",
    + at_driver_name, data->reg_num,
    + data->val_in);
    + if (at_write_phy_reg(&adapter->hw, data->reg_num, data->val_in)) {
    + spin_unlock_irqrestore(&adapter->stats_lock, flags);
    + return -EIO;
    + }
    + spin_unlock_irqrestore(&adapter->stats_lock, flags);
    + break;
    + default:
    + return -EOPNOTSUPP;
    + }
    + return AT_SUCCESS;
    +}
    +#endif /* SIOCGMIIPHY */
    +
    +/**
    + * at_ioctl -
    + * @netdev:
    + * @ifreq:
    + * @cmd:
    + **/
    +static int at_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
    +{
    + switch (cmd) {
    +#ifdef SIOCGMIIPHY
    + case SIOCGMIIPHY:
    + case SIOCGMIIREG:
    + case SIOCSMIIREG:
    + return at_mii_ioctl(netdev, ifr, cmd);
    +#endif
    + case SIOCETHTOOL:
    + at_set_ethtool_ops(netdev);
    + default:
    + return -EOPNOTSUPP;
    + }
    +}
    +
    +/**
    + * at_tx_timeout - Respond to a Tx Hang
    + * @netdev: network interface device structure
    + **/
    +static void at_tx_timeout(struct net_device *netdev)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + /* Do the reset outside of interrupt context */
    + schedule_work(&adapter->tx_timeout_task);
    +}
    +
    +/**
    + * at_phy_config - Timer Call-back
    + * @data: pointer to netdev cast into an unsigned long
    + **/
    +static void at_phy_config(unsigned long data)
    +{
    + struct at_adapter *adapter = (struct at_adapter *)data;
    + struct at_hw *hw = &adapter->hw;
    + unsigned long flags;
    +
    + spin_lock_irqsave(&adapter->stats_lock, flags);
    + adapter->phy_timer_pending = false;
    + at_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
    + at_write_phy_reg(hw, MII_AT001_CR, hw->mii_1000t_ctrl_reg);
    + at_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN);
    + spin_unlock_irqrestore(&adapter->stats_lock, flags);
    +}
    +
    +int at_reset(struct at_adapter *adapter)
    +{
    + int ret;
    + if (AT_SUCCESS != (ret = at_reset_hw(&adapter->hw)))
    + return ret;
    + return at_init_hw(&adapter->hw);
    +}
    +
    +/**
    + * at_open - Called when a network interface is made active
    + * @netdev: network interface device structure
    + *
    + * Returns 0 on success, negative value on failure
    + *
    + * The open entry point is called when a network interface is made
    + * active by the system (IFF_UP). At this point all resources needed
    + * for transmit and receive operations are allocated, the interrupt
    + * handler is registered with the OS, the watchdog timer is started,
    + * and the stack is notified that the interface is ready.
    + **/
    +static int at_open(struct net_device *netdev)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + int err;
    +
    + /* allocate transmit descriptors */
    + if ((err = at_setup_ring_resources(adapter)))
    + return err;
    + if ((err = at_up(adapter)))
    + goto err_up;
    +
    + return 0;
    +
    + err_up:
    + at_reset(adapter);
    + return err;
    +}
    +
    +/**
    + * at_close - Disables a network interface
    + * @netdev: network interface device structure
    + *
    + * Returns 0, this is not allowed to fail
    + *
    + * The close entry point is called when an interface is de-activated
    + * by the OS. The hardware is still under the drivers control, but
    + * needs to be disabled. A global MAC reset is issued to stop the
    + * hardware, and all transmit and receive resources are freed.
    + **/
    +static int at_close(struct net_device *netdev)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + at_down(adapter);
    + at_free_ring_resources(adapter);
    + return 0;
    +}
    +
    +/**
    + * If TPD Buffer size equal to 0, PCIE DMAR_TO_INT
    + * will assert. We do soft reset <0x1400=1> according
    + * with the SPEC. BUT, it seemes that PCIE or DMA
    + * state-machine will not be reset. DMAR_TO_INT will
    + * assert again and again.
    + */
    +static void at_tx_timeout_task(struct net_device *netdev)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + netif_device_detach(netdev);
    + at_down(adapter);
    + at_up(adapter);
    + netif_device_attach(netdev);
    +}
    +
    +/**
    + * at_link_chg_task - deal with link change event Out of interrupt context
    + * @netdev: network interface device structure
    + **/
    +static void at_link_chg_task(struct net_device *netdev)
    +{
    + struct at_adapter *adapter = netdev_priv(netdev);
    + unsigned long flags;
    + spin_lock_irqsave(&adapter->stats_lock, flags);
    + at_check_link(adapter);
    + spin_unlock_irqrestore(&adapter->stats_lock, flags);
    +}
    +
    +/**
    + * at_pcie_patch - Patch for PCIE module
    + **/
    +static void at_pcie_patch(struct at_adapter *adapter)
    +{
    + u32 value;
    + value = 0x6500;
    + AT_WRITE_REG(&adapter->hw, 0x12FC, value);
    + /* pcie flow control mode change */
    + value = AT_READ_REG(&adapter->hw, 0x1008);
    + value |= 0x8000;
    + AT_WRITE_REG(&adapter->hw, 0x1008, value);
    +}
    +
    +/**
    + * When ACPI resume on some VIA MotherBoard, the Interrupt Disable bit/0x400
    + * on PCI Command register is disable.
    + * The function enable this bit.
    + * Brackett, 2006/03/15
    + */
    +static void at_via_workaround(struct at_adapter *adapter)
    +{
    + unsigned long value;
    + value = AT_READ_REGW(&adapter->hw, PCI_COMMAND);
    + if (value & PCI_COMMAND_INTX_DISABLE) {
    + value &= ~PCI_COMMAND_INTX_DISABLE;
    + }
    +
    + AT_WRITE_REG(&adapter->hw, PCI_COMMAND, value);
    +}
    +
    +/**
    + * at_probe - Device Initialization Routine
    + * @pdev: PCI device information struct
    + * @ent: entry in at_pci_tbl
    + *
    + * Returns 0 on success, negative on failure
    + *
    + * at_probe initializes an adapter identified by a pci_dev structure.
    + * The OS initialization, configuring of the adapter private structure,
    + * and a hardware reset occur.
    + **/
    +static int __devinit at_probe(struct pci_dev *pdev,
    + const struct pci_device_id *ent)
    +{
    + struct net_device *netdev;
    + struct at_adapter *adapter;
    + static int cards_found = 0;
    + unsigned long mmio_start;
    + int mmio_len;
    + bool pci_using_64 = true;
    + int err;
    + /* u16 eeprom_data; */
    +
    + if ((err = pci_enable_device(pdev)))
    + return err;
    + if ((err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
    + if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
    + printk(KERN_DEBUG
    + "%s: no usable DMA configuration, aborting\n",
    + at_driver_name);
    + return err;
    + }
    + pci_using_64 = false;
    + }
    + /* Mark all PCI regions associated with PCI device
    + * pdev as being reserved by owner at_driver_name */
    + if ((err = pci_request_regions(pdev, at_driver_name)))
    + return err;
    + /* Enables bus-mastering on the device and calls
    + * pcibios_set_master to do the needed arch specific settings */
    + pci_set_master(pdev);
    +
    + netdev = alloc_etherdev(sizeof(struct at_adapter));
    + if (!netdev) {
    + err = -ENOMEM;
    + goto err_alloc_etherdev;
    + }
    + SET_MODULE_OWNER(netdev);
    + SET_NETDEV_DEV(netdev, &pdev->dev);
    +
    + pci_set_drvdata(pdev, netdev);
    + adapter = netdev_priv(netdev);
    + adapter->netdev = netdev;
    + adapter->pdev = pdev;
    + adapter->hw.back = adapter;
    +
    + mmio_start = pci_resource_start(pdev, BAR_0);
    + mmio_len = pci_resource_len(pdev, BAR_0);
    +
    + adapter->hw.mem_rang = (u32) mmio_len;
    + adapter->hw.hw_addr = ioremap_nocache(mmio_start, mmio_len);
    + if (!adapter->hw.hw_addr) {
    + err = -EIO;
    + goto err_ioremap;
    + }
    + /* get device revision number */
    + adapter->hw.dev_rev = AT_READ_REGW(&adapter->hw, (REG_MASTER_CTRL + 2));
    +
    + /* set default ring resource counts */
    + adapter->rfd_ring.count = adapter->rrd_ring.count = AT_DEFAULT_RFD;
    + adapter->tpd_ring.count = AT_DEFAULT_TPD;
    +
    + netdev->open = &at_open;
    + netdev->stop = &at_close;
    + netdev->hard_start_xmit = &at_xmit_frame;
    + netdev->get_stats = &at_get_stats;
    + netdev->set_multicast_list = &at_set_multi;
    + netdev->set_mac_address = &at_set_mac;
    + netdev->change_mtu = &at_change_mtu;
    + netdev->do_ioctl = &at_ioctl;
    +#ifdef HAVE_TX_TIMEOUT
    + netdev->tx_timeout = &at_tx_timeout;
    + netdev->watchdog_timeo = 5 * HZ;
    +#endif
    +#ifdef NETIF_F_HW_VLAN_TX
    + netdev->vlan_rx_register = at_vlan_rx_register;
    + netdev->vlan_rx_add_vid = at_vlan_rx_add_vid;
    + netdev->vlan_rx_kill_vid = at_vlan_rx_kill_vid;
    +#endif
    + netdev->mem_start = mmio_start;
    + netdev->mem_end = mmio_start + mmio_len;
    + /* netdev->base_addr = adapter->io_base; */
    + adapter->bd_number = cards_found;
    + adapter->pci_using_64 = pci_using_64;
    +
    + /* setup the private structure */
    + if ((err = at_sw_init(adapter)))
    + goto err_sw_init;
    + netdev->features = NETIF_F_HW_CSUM;
    +
    +#ifdef MAX_SKB_FRAGS
    + netdev->features |= NETIF_F_SG;
    +#endif
    +
    +#ifdef NETIF_F_HW_VLAN_TX
    + netdev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
    +#endif
    +
    +#ifdef NETIF_F_TSO
    + netdev->features |= NETIF_F_TSO;
    +#endif /*NETIF_F_TSO */
    +
    + if (pci_using_64) {
    + netdev->features |= NETIF_F_HIGHDMA;
    + }
    +#ifdef NETIF_F_LLTX
    + netdev->features |= NETIF_F_LLTX;
    +#endif
    + /* patch for some L1 of old version,
    + * the final version of L1 may not need these
    + * patches */
    + /* at_pcie_patch(adapter); */
    +
    + /* really reset GPHY core */
    + AT_WRITE_REGW(&adapter->hw, REG_GPHY_ENABLE, 0);
    +
    + /* reset the controller to
    + * put the device in a known good starting state */
    + if (at_reset_hw(&adapter->hw)) {
    + err = -EIO;
    + goto err_reset;
    + }
    +
    + /* copy the MAC address out of the EEPROM */
    + at_read_mac_addr(&adapter->hw);
    + memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
    +
    + if (!is_valid_ether_addr(netdev->dev_addr)) {
    + err = -EIO;
    + goto err_eeprom;
    + }
    +
    + at_check_options(adapter);
    +
    + /* pre-init the MAC, and setup link */
    + if ((err = at_init_hw(&adapter->hw))) {
    + err = -EIO;
    + goto err_init_hw;
    + }
    +
    + at_pcie_patch(adapter);
    + /* assume we have no link for now */
    + netif_carrier_off(netdev);
    + netif_stop_queue(netdev);
    +
    + init_timer(&adapter->watchdog_timer);
    + adapter->watchdog_timer.function = &at_watchdog;
    + adapter->watchdog_timer.data = (unsigned long)adapter;
    +
    + init_timer(&adapter->phy_config_timer);
    + adapter->phy_config_timer.function = &at_phy_config;
    + adapter->phy_config_timer.data = (unsigned long)adapter;
    + adapter->phy_timer_pending = false;
    +
    + INIT_WORK(&adapter->tx_timeout_task,
    + (void (*)(void *))at_tx_timeout_task, netdev);
    +
    + INIT_WORK(&adapter->link_chg_task, (void (*)(void *))at_link_chg_task,
    + netdev);
    +
    + INIT_WORK(&adapter->pcie_dma_to_rst_task,
    + (void (*)(void *))at_tx_timeout_task, netdev);
    +
    + if ((err = register_netdev(netdev)))
    + goto err_register;
    +
    + cards_found++;
    + at_via_workaround(adapter);
    + return 0;
    +
    + err_init_hw:
    + err_reset:
    + err_register:
    + err_sw_init:
    + err_eeprom:
    + iounmap(adapter->hw.hw_addr);
    + err_ioremap:
    + free_netdev(netdev);
    + err_alloc_etherdev:
    + pci_release_regions(pdev);
    + return err;
    +}
    +
    +/**
    + * at_remove - Device Removal Routine
    + * @pdev: PCI device information struct
    + *
    + * at_remove is called by the PCI subsystem to alert the driver
    + * that it should release a PCI device. The could be caused by a
    + * Hot-Plug event, or because the driver is going to be removed from
    + * memory.
    + **/
    +static void __devexit at_remove(struct pci_dev *pdev)
    +{
    + struct net_device *netdev = pci_get_drvdata(pdev);
    + struct at_adapter *adapter;
    + /* Device not available. Return. */
    + if (!netdev)
    + return;
    +
    + adapter = netdev_priv(netdev);
    + AT_WRITE_REGW(&adapter->hw, REG_GPHY_ENABLE, 0);
    + unregister_netdev(netdev);
    + iounmap(adapter->hw.hw_addr);
    + pci_release_regions(pdev);
    + free_netdev(netdev);
    +}
    +
    +static int at_suspend(struct pci_dev *pdev, pm_message_t state)
    +{
    + struct net_device *netdev = pci_get_drvdata(pdev);
    + struct at_adapter *adapter = netdev_priv(netdev);
    + struct at_hw *hw = &adapter->hw;
    + u32 ctrl = 0;
    + u32 wufc = adapter->wol;
    +
    + netif_device_detach(netdev);
    + if (netif_running(netdev))
    + at_down(adapter);
    +
    + at_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
    + at_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
    + if (ctrl & BMSR_LSTATUS)
    + wufc &= ~AT_WUFC_LNKC;
    +
    + /* reduce speed to 10/100M */
    + if (wufc) {
    + at_phy_enter_power_saving(hw);
    + /* if resume, let driver to re- setup link */
    + hw->phy_configured = false;
    + set_mac_addr(hw);
    + at_set_multi(netdev);
    +
    + ctrl = 0;
    + /* turn on magic packet wol */
    + if (wufc & AT_WUFC_MAG) {
    + ctrl = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
    + }
    + /* turn on Link change WOL */
    + if (wufc & AT_WUFC_LNKC) {
    + ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
    + }
    + AT_WRITE_REG(hw, REG_WOL_CTRL, ctrl);
    +
    + /* turn on all-multi mode if wake on multicast is enabled */
    + ctrl = AT_READ_REG(hw, REG_MAC_CTRL);
    + ctrl &= ~MAC_CTRL_DBG;
    + ctrl &= ~MAC_CTRL_PROMIS_EN;
    + if (wufc & AT_WUFC_MC) {
    + ctrl |= MAC_CTRL_MC_ALL_EN;
    + } else {
    + ctrl &= ~MAC_CTRL_MC_ALL_EN;
    + }
    + /* turn on broadcast mode if wake on-BC is enabled */
    + if (wufc & AT_WUFC_BC) {
    + ctrl |= MAC_CTRL_BC_EN;
    + } else {
    + ctrl &= ~MAC_CTRL_BC_EN;
    + }
    + /* enable RX */
    + ctrl |= MAC_CTRL_RX_EN;
    + AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl);
    + pci_enable_wake(pdev, PCI_D3hot, 1);
    + pci_enable_wake(pdev, PCI_D3cold, 1); /* 4 == D3 cold */
    + } else {
    + AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
    + pci_enable_wake(pdev, PCI_D3hot, 0);
    + pci_enable_wake(pdev, PCI_D3cold, 0); /* 4 == D3 cold */
    + }
    +
    + pci_save_state(pdev);
    + pci_disable_device(pdev);
    +
    + pci_set_power_state(pdev, PCI_D3hot);
    +
    + return 0;
    +}
    +
    +static int at_resume(struct pci_dev *pdev)
    +{
    + struct net_device *netdev = pci_get_drvdata(pdev);
    + struct at_adapter *adapter = netdev_priv(netdev);
    + u32 ret_val;
    +
    + pci_set_power_state(pdev, 0);
    + pci_restore_state(pdev);
    +
    + ret_val = pci_enable_device(pdev);
    + pci_enable_wake(pdev, PCI_D3hot, 0);
    + pci_enable_wake(pdev, PCI_D3cold, 0);
    +
    + AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
    + at_reset(adapter);
    +
    + if (netif_running(netdev))
    + at_up(adapter);
    + netif_device_attach(netdev);
    +
    + at_via_workaround(adapter);
    +
    + return 0;
    +}
    +
    +static struct pci_driver at_driver = {
    + .name = at_driver_name,
    + .id_table = at_pci_tbl,
    + .probe = at_probe,
    + .remove = __devexit_p(at_remove),
    + /* Power Managment Hooks */
    + /* probably broken right now -- CHS */
    +#ifdef CONFIG_PM
    + .suspend = at_suspend,
    + .resume = at_resume
    +#endif
    +};
    +
    +/**
    + * at_exit_module - Driver Exit Cleanup Routine
    + *
    + * at_exit_module is called just before the driver is removed
    + * from memory.
    + **/
    +static void __exit at_exit_module(void)
    +{
    + pci_unregister_driver(&at_driver);
    +}
    +
    +/**
    + * at_init_module - Driver Registration Routine
    + *
    + * at_init_module is the first routine called when the driver is
    + * loaded. All it does is register with the PCI subsystem.
    + **/
    +static int __init at_init_module(void)
    +{
    + int ret;
    + printk(KERN_INFO "%s - version %s\n", at_driver_string, DRV_VERSION);
    + printk(KERN_INFO "%s\n", at_copyright);
    + ret = pci_module_init(&at_driver);
    +
    + return ret;
    +}
    +
    +module_init(at_init_module);
    +module_exit(at_exit_module);
    -
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      Last update: 2006-11-19 21:35    [W:0.192 / U:33.188 seconds]
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