diff options
Diffstat (limited to 'drivers/net/atl1e/atl1e_main.c')
| -rw-r--r-- | drivers/net/atl1e/atl1e_main.c | 2599 |
1 files changed, 2599 insertions, 0 deletions
diff --git a/drivers/net/atl1e/atl1e_main.c b/drivers/net/atl1e/atl1e_main.c new file mode 100644 index 00000000000..367c7275063 --- /dev/null +++ b/drivers/net/atl1e/atl1e_main.c @@ -0,0 +1,2599 @@ +/* + * Copyright(c) 2007 Atheros Corporation. All rights reserved. + * + * 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. + */ + +#include "atl1e.h" + +#define DRV_VERSION "1.0.0.7-NAPI" + +char atl1e_driver_name[] = "ATL1E"; +char atl1e_driver_version[] = DRV_VERSION; +#define PCI_DEVICE_ID_ATTANSIC_L1E 0x1026 +/* + * atl1e_pci_tbl - PCI Device ID Table + * + * Wildcard entries (PCI_ANY_ID) should come last + * Last entry must be all 0s + * + * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, + * Class, Class Mask, private data (not used) } + */ +static struct pci_device_id atl1e_pci_tbl[] = { + {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)}, + /* required last entry */ + { 0 } +}; +MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl); + +MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>"); +MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + +static inline void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter); + +static const u16 +atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] = +{ + {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD}, + {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD}, + {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD}, + {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD} +}; + +static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] = +{ + REG_RXF0_BASE_ADDR_HI, + REG_RXF1_BASE_ADDR_HI, + REG_RXF2_BASE_ADDR_HI, + REG_RXF3_BASE_ADDR_HI +}; + +static const u16 +atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] = +{ + {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO}, + {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO}, + {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO}, + {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO} +}; + +static const u16 +atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] = +{ + {REG_HOST_RXF0_MB0_LO, REG_HOST_RXF0_MB1_LO}, + {REG_HOST_RXF1_MB0_LO, REG_HOST_RXF1_MB1_LO}, + {REG_HOST_RXF2_MB0_LO, REG_HOST_RXF2_MB1_LO}, + {REG_HOST_RXF3_MB0_LO, REG_HOST_RXF3_MB1_LO} +}; + +static const u16 atl1e_pay_load_size[] = { + 128, 256, 512, 1024, 2048, 4096, +}; + +/* + * atl1e_irq_enable - Enable default interrupt generation settings + * @adapter: board private structure + */ +static inline void atl1e_irq_enable(struct atl1e_adapter *adapter) +{ + if (likely(atomic_dec_and_test(&adapter->irq_sem))) { + AT_WRITE_REG(&adapter->hw, REG_ISR, 0); + AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK); + AT_WRITE_FLUSH(&adapter->hw); + } +} + +/* + * atl1e_irq_disable - Mask off interrupt generation on the NIC + * @adapter: board private structure + */ +static inline void atl1e_irq_disable(struct atl1e_adapter *adapter) +{ + atomic_inc(&adapter->irq_sem); + AT_WRITE_REG(&adapter->hw, REG_IMR, 0); + AT_WRITE_FLUSH(&adapter->hw); + synchronize_irq(adapter->pdev->irq); +} + +/* + * atl1e_irq_reset - reset interrupt confiure on the NIC + * @adapter: board private structure + */ +static inline void atl1e_irq_reset(struct atl1e_adapter *adapter) +{ + atomic_set(&adapter->irq_sem, 0); + AT_WRITE_REG(&adapter->hw, REG_ISR, 0); + AT_WRITE_REG(&adapter->hw, REG_IMR, 0); + AT_WRITE_FLUSH(&adapter->hw); +} + +/* + * atl1e_phy_config - Timer Call-back + * @data: pointer to netdev cast into an unsigned long + */ +static void atl1e_phy_config(unsigned long data) +{ + struct atl1e_adapter *adapter = (struct atl1e_adapter *) data; + struct atl1e_hw *hw = &adapter->hw; + unsigned long flags; + + spin_lock_irqsave(&adapter->mdio_lock, flags); + atl1e_restart_autoneg(hw); + spin_unlock_irqrestore(&adapter->mdio_lock, flags); +} + +void atl1e_reinit_locked(struct atl1e_adapter *adapter) +{ + + WARN_ON(in_interrupt()); + while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) + msleep(1); + atl1e_down(adapter); + atl1e_up(adapter); + clear_bit(__AT_RESETTING, &adapter->flags); +} + +static void atl1e_reset_task(struct work_struct *work) +{ + struct atl1e_adapter *adapter; + adapter = container_of(work, struct atl1e_adapter, reset_task); + + atl1e_reinit_locked(adapter); +} + +static int atl1e_check_link(struct atl1e_adapter *adapter) +{ + struct atl1e_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + int err = 0; + u16 speed, duplex, phy_data; + + /* MII_BMSR must read twise */ + atl1e_read_phy_reg(hw, MII_BMSR, &phy_data); + atl1e_read_phy_reg(hw, MII_BMSR, &phy_data); + if ((phy_data & BMSR_LSTATUS) == 0) { + /* link down */ + if (netif_carrier_ok(netdev)) { /* old link state: Up */ + u32 value; + /* disable rx */ + value = AT_READ_REG(hw, REG_MAC_CTRL); + value &= ~MAC_CTRL_RX_EN; + AT_WRITE_REG(hw, REG_MAC_CTRL, value); + adapter->link_speed = SPEED_0; + netif_carrier_off(netdev); + netif_stop_queue(netdev); + } + } else { + /* Link Up */ + err = atl1e_get_speed_and_duplex(hw, &speed, &duplex); + if (unlikely(err)) + return err; + + /* link result is our setting */ + if (adapter->link_speed != speed || + adapter->link_duplex != duplex) { + adapter->link_speed = speed; + adapter->link_duplex = duplex; + atl1e_setup_mac_ctrl(adapter); + dev_info(&pdev->dev, + "%s: %s NIC Link is Up<%d Mbps %s>\n", + atl1e_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 0; +} + +/* + * atl1e_link_chg_task - deal with link change event Out of interrupt context + * @netdev: network interface device structure + */ +static void atl1e_link_chg_task(struct work_struct *work) +{ + struct atl1e_adapter *adapter; + unsigned long flags; + + adapter = container_of(work, struct atl1e_adapter, link_chg_task); + spin_lock_irqsave(&adapter->mdio_lock, flags); + atl1e_check_link(adapter); + spin_unlock_irqrestore(&adapter->mdio_lock, flags); +} + +static void atl1e_link_chg_event(struct atl1e_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + u16 phy_data = 0; + u16 link_up = 0; + + spin_lock(&adapter->mdio_lock); + atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); + atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data); + spin_unlock(&adapter->mdio_lock); + link_up = phy_data & BMSR_LSTATUS; + /* notify upper layer link down ASAP */ + if (!link_up) { + if (netif_carrier_ok(netdev)) { + /* old link state: Up */ + dev_info(&pdev->dev, "%s: %s NIC Link is Down\n", + atl1e_driver_name, netdev->name); + adapter->link_speed = SPEED_0; + netif_stop_queue(netdev); + } + } + schedule_work(&adapter->link_chg_task); +} + +static void atl1e_del_timer(struct atl1e_adapter *adapter) +{ + del_timer_sync(&adapter->phy_config_timer); +} + +static void atl1e_cancel_work(struct atl1e_adapter *adapter) +{ + cancel_work_sync(&adapter->reset_task); + cancel_work_sync(&adapter->link_chg_task); +} + +/* + * atl1e_tx_timeout - Respond to a Tx Hang + * @netdev: network interface device structure + */ +static void atl1e_tx_timeout(struct net_device *netdev) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + + /* Do the reset outside of interrupt context */ + schedule_work(&adapter->reset_task); +} + +/* + * atl1e_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 atl1e_set_multi(struct net_device *netdev) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + struct atl1e_hw *hw = &adapter->hw; + struct dev_mc_list *mc_ptr; + u32 mac_ctrl_data = 0; + u32 hash_value; + + /* Check for Promiscuous and All Multicast modes */ + mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL); + + if (netdev->flags & IFF_PROMISC) { + mac_ctrl_data |= MAC_CTRL_PROMIS_EN; + } else if (netdev->flags & IFF_ALLMULTI) { + mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; + mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; + } else { + mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); + } + + AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); + + /* 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); + + /* comoute 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 = atl1e_hash_mc_addr(hw, mc_ptr->dmi_addr); + atl1e_hash_set(hw, hash_value); + } +} + +static void atl1e_vlan_rx_register(struct net_device *netdev, + struct vlan_group *grp) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + struct pci_dev *pdev = adapter->pdev; + u32 mac_ctrl_data = 0; + + dev_dbg(&pdev->dev, "atl1e_vlan_rx_register\n"); + + atl1e_irq_disable(adapter); + + adapter->vlgrp = grp; + mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL); + + if (grp) { + /* enable VLAN tag insert/strip */ + mac_ctrl_data |= MAC_CTRL_RMV_VLAN; + } else { + /* disable VLAN tag insert/strip */ + mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; + } + + AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); + atl1e_irq_enable(adapter); +} + +static void atl1e_restore_vlan(struct atl1e_adapter *adapter) +{ + struct pci_dev *pdev = adapter->pdev; + + dev_dbg(&pdev->dev, "atl1e_restore_vlan !"); + atl1e_vlan_rx_register(adapter->netdev, adapter->vlgrp); +} +/* + * atl1e_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 atl1e_set_mac_addr(struct net_device *netdev, void *p) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + struct sockaddr *addr = p; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + if (netif_running(netdev)) + return -EBUSY; + + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); + memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); + + atl1e_hw_set_mac_addr(&adapter->hw); + + return 0; +} + +/* + * atl1e_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 atl1e_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + int old_mtu = netdev->mtu; + int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; + + if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) || + (max_frame > MAX_JUMBO_FRAME_SIZE)) { + dev_warn(&adapter->pdev->dev, "invalid MTU setting\n"); + return -EINVAL; + } + /* set MTU */ + if (old_mtu != new_mtu && netif_running(netdev)) { + while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) + msleep(1); + netdev->mtu = new_mtu; + adapter->hw.max_frame_size = new_mtu; + adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3; + atl1e_down(adapter); + atl1e_up(adapter); + clear_bit(__AT_RESETTING, &adapter->flags); + } + return 0; +} + +/* + * caller should hold mdio_lock + */ +static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + u16 result; + + atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result); + return result; +} + +static void atl1e_mdio_write(struct net_device *netdev, int phy_id, + int reg_num, int val) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + + atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val); +} + +/* + * atl1e_mii_ioctl - + * @netdev: + * @ifreq: + * @cmd: + */ +static int atl1e_mii_ioctl(struct net_device *netdev, + struct ifreq *ifr, int cmd) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + struct pci_dev *pdev = adapter->pdev; + struct mii_ioctl_data *data = if_mii(ifr); + unsigned long flags; + int retval = 0; + + if (!netif_running(netdev)) + return -EINVAL; + + spin_lock_irqsave(&adapter->mdio_lock, flags); + switch (cmd) { + case SIOCGMIIPHY: + data->phy_id = 0; + break; + + case SIOCGMIIREG: + if (!capable(CAP_NET_ADMIN)) { + retval = -EPERM; + goto out; + } + if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, + &data->val_out)) { + retval = -EIO; + goto out; + } + break; + + case SIOCSMIIREG: + if (!capable(CAP_NET_ADMIN)) { + retval = -EPERM; + goto out; + } + if (data->reg_num & ~(0x1F)) { + retval = -EFAULT; + goto out; + } + + dev_dbg(&pdev->dev, "<atl1e_mii_ioctl> write %x %x", + data->reg_num, data->val_in); + if (atl1e_write_phy_reg(&adapter->hw, + data->reg_num, data->val_in)) { + retval = -EIO; + goto out; + } + break; + + default: + retval = -EOPNOTSUPP; + break; + } +out: + spin_unlock_irqrestore(&adapter->mdio_lock, flags); + return retval; + +} + +/* + * atl1e_ioctl - + * @netdev: + * @ifreq: + * @cmd: + */ +static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) +{ + switch (cmd) { + case SIOCGMIIPHY: + case SIOCGMIIREG: + case SIOCSMIIREG: + return atl1e_mii_ioctl(netdev, ifr, cmd); + default: + return -EOPNOTSUPP; + } +} + +static void atl1e_setup_pcicmd(struct pci_dev *pdev) +{ + u16 cmd; + + pci_read_config_word(pdev, PCI_COMMAND, &cmd); + cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO); + cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); + pci_write_config_word(pdev, PCI_COMMAND, cmd); + + /* + * some motherboards BIOS(PXE/EFI) driver may set PME + * while they transfer control to OS (Windows/Linux) + * so we should clear this bit before NIC work normally + */ + pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0); + msleep(1); +} + +/* + * atl1e_alloc_queues - Allocate memory for all rings + * @adapter: board private structure to initialize + * + */ +static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter) +{ + return 0; +} + +/* + * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter) + * @adapter: board private structure to initialize + * + * atl1e_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 atl1e_sw_init(struct atl1e_adapter *adapter) +{ + struct atl1e_hw *hw = &adapter->hw; + struct pci_dev *pdev = adapter->pdev; + u32 phy_status_data = 0; + + adapter->wol = 0; + adapter->link_speed = SPEED_0; /* hardware init */ + adapter->link_duplex = FULL_DUPLEX; + adapter->num_rx_queues = 1; + + /* 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); + + phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS); + /* nic type */ + if (hw->revision_id >= 0xF0) { + hw->nic_type = athr_l2e_revB; + } else { + if (phy_status_data & PHY_STATUS_100M) + hw->nic_type = athr_l1e; + else + hw->nic_type = athr_l2e_revA; + } + + phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS); + + if (phy_status_data & PHY_STATUS_EMI_CA) + hw->emi_ca = true; + else + hw->emi_ca = false; + + hw->phy_configured = false; + hw->preamble_len = 7; + hw->max_frame_size = adapter->netdev->mtu; + hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN + + VLAN_HLEN + ETH_FCS_LEN + 7) >> 3; + + hw->rrs_type = atl1e_rrs_disable; + hw->indirect_tab = 0; + hw->base_cpu = 0; + + /* need confirm */ + + hw->ict = 50000; /* 100ms */ + hw->smb_timer = 200000; /* 200ms */ + hw->tpd_burst = 5; + hw->rrd_thresh = 1; + hw->tpd_thresh = adapter->tx_ring.count / 2; + hw->rx_count_down = 4; /* 2us resolution */ + hw->tx_count_down = hw->imt * 4 / 3; + hw->dmar_block = atl1e_dma_req_1024; + hw->dmaw_block = atl1e_dma_req_1024; + hw->dmar_dly_cnt = 15; + hw->dmaw_dly_cnt = 4; + + if (atl1e_alloc_queues(adapter)) { + dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); + return -ENOMEM; + } + + atomic_set(&adapter->irq_sem, 1); + spin_lock_init(&adapter->mdio_lock); + spin_lock_init(&adapter->tx_lock); + + set_bit(__AT_DOWN, &adapter->flags); + + return 0; +} + +/* + * atl1e_clean_tx_ring - Free Tx-skb + * @adapter: board private structure + */ +static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter) +{ + struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *) + &adapter->tx_ring; + struct atl1e_tx_buffer *tx_buffer = NULL; + struct pci_dev *pdev = adapter->pdev; + u16 index, ring_count; + + if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL) + return; + + ring_count = tx_ring->count; + /* first unmmap dma */ + for (index = 0; index < ring_count; index++) { + tx_buffer = &tx_ring->tx_buffer[index]; + if (tx_buffer->dma) { + pci_unmap_page(pdev, tx_buffer->dma, + tx_buffer->length, PCI_DMA_TODEVICE); + tx_buffer->dma = 0; + } + } + /* second free skb */ + for (index = 0; index < ring_count; index++) { + tx_buffer = &tx_ring->tx_buffer[index]; + if (tx_buffer->skb) { + dev_kfree_skb_any(tx_buffer->skb); + tx_buffer->skb = NULL; + } + } + /* Zero out Tx-buffers */ + memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) * + ring_count); + memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) * + ring_count); +} + +/* + * atl1e_clean_rx_ring - Free rx-reservation skbs + * @adapter: board private structure + */ +static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter) +{ + struct atl1e_rx_ring *rx_ring = + (struct atl1e_rx_ring *)&adapter->rx_ring; + struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc; + u16 i, j; + + + if (adapter->ring_vir_addr == NULL) + return; + /* Zero out the descriptor ring */ + for (i = 0; i < adapter->num_rx_queues; i++) { + for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { + if (rx_page_desc[i].rx_page[j].addr != NULL) { + memset(rx_page_desc[i].rx_page[j].addr, 0, + rx_ring->real_page_size); + } + } + } +} + +static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size) +{ + *ring_size = ((u32)(adapter->tx_ring.count * + sizeof(struct atl1e_tpd_desc) + 7 + /* tx ring, qword align */ + + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE * + adapter->num_rx_queues + 31 + /* rx ring, 32 bytes align */ + + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) * + sizeof(u32) + 3)); + /* tx, rx cmd, dword align */ +} + +static void atl1e_init_ring_resources(struct atl1e_adapter *adapter) +{ + struct atl1e_tx_ring *tx_ring = NULL; + struct atl1e_rx_ring *rx_ring = NULL; + + tx_ring = &adapter->tx_ring; + rx_ring = &adapter->rx_ring; + + rx_ring->real_page_size = adapter->rx_ring.page_size + + adapter->hw.max_frame_size + + ETH_HLEN + VLAN_HLEN + + ETH_FCS_LEN; + rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32); + atl1e_cal_ring_size(adapter, &adapter->ring_size); + + adapter->ring_vir_addr = NULL; + adapter->rx_ring.desc = NULL; + rwlock_init(&adapter->tx_ring.tx_lock); + + return; +} + +/* + * Read / Write Ptr Initialize: + */ +static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter) +{ + struct atl1e_tx_ring *tx_ring = NULL; + struct atl1e_rx_ring *rx_ring = NULL; + struct atl1e_rx_page_desc *rx_page_desc = NULL; + int i, j; + + tx_ring = &adapter->tx_ring; + rx_ring = &adapter->rx_ring; + rx_page_desc = rx_ring->rx_page_desc; + + tx_ring->next_to_use = 0; + atomic_set(&tx_ring->next_to_clean, 0); + + for (i = 0; i < adapter->num_rx_queues; i++) { + rx_page_desc[i].rx_using = 0; + rx_page_desc[i].rx_nxseq = 0; + for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { + *rx_page_desc[i].rx_page[j].write_offset_addr = 0; + rx_page_desc[i].rx_page[j].read_offset = 0; + } + } +} + +/* + * atl1e_free_ring_resources - Free Tx / RX descriptor Resources + * @adapter: board private structure + * + * Free all transmit software resources + */ +static void atl1e_free_ring_resources(struct atl1e_adapter *adapter) +{ + struct pci_dev *pdev = adapter->pdev; + + atl1e_clean_tx_ring(adapter); + atl1e_clean_rx_ring(adapter); + + if (adapter->ring_vir_addr) { + pci_free_consistent(pdev, adapter->ring_size, + adapter->ring_vir_addr, adapter->ring_dma); + adapter->ring_vir_addr = NULL; + } + + if (adapter->tx_ring.tx_buffer) { + kfree(adapter->tx_ring.tx_buffer); + adapter->tx_ring.tx_buffer = NULL; + } +} + +/* + * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources + * @adapter: board private structure + * + * Return 0 on success, negative on failure + */ +static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter) +{ + struct pci_dev *pdev = adapter->pdev; + struct atl1e_tx_ring *tx_ring; + struct atl1e_rx_ring *rx_ring; + struct atl1e_rx_page_desc *rx_page_desc; + int size, i, j; + u32 offset = 0; + int err = 0; + + if (adapter->ring_vir_addr != NULL) + return 0; /* alloced already */ + + tx_ring = &adapter->tx_ring; + rx_ring = &adapter->rx_ring; + + /* real ring DMA buffer */ + + size = adapter->ring_size; + adapter->ring_vir_addr = pci_alloc_consistent(pdev, + adapter->ring_size, &adapter->ring_dma); + + if (adapter->ring_vir_addr == NULL) { + dev_err(&pdev->dev, "pci_alloc_consistent failed, " + "size = D%d", size); + return -ENOMEM; + } + + memset(adapter->ring_vir_addr, 0, adapter->ring_size); + + rx_page_desc = rx_ring->rx_page_desc; + + /* Init TPD Ring */ + tx_ring->dma = roundup(adapter->ring_dma, 8); + offset = tx_ring->dma - adapter->ring_dma; + tx_ring->desc = (struct atl1e_tpd_desc *) + (adapter->ring_vir_addr + offset); + size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count); + tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL); + if (tx_ring->tx_buffer == NULL) { + dev_err(&pdev->dev, "kzalloc failed , size = D%d", size); + err = -ENOMEM; + goto failed; + } + + /* Init RXF-Pages */ + offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count); + offset = roundup(offset, 32); + + for (i = 0; i < adapter->num_rx_queues; i++) { + for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { + rx_page_desc[i].rx_page[j].dma = + adapter->ring_dma + offset; + rx_page_desc[i].rx_page[j].addr = + adapter->ring_vir_addr + offset; + offset += rx_ring->real_page_size; + } + } + + /* Init CMB dma address */ + tx_ring->cmb_dma = adapter->ring_dma + offset; + tx_ring->cmb = (u32 *)(adapter->ring_vir_addr + offset); + offset += sizeof(u32); + + for (i = 0; i < adapter->num_rx_queues; i++) { + for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { + rx_page_desc[i].rx_page[j].write_offset_dma = + adapter->ring_dma + offset; + rx_page_desc[i].rx_page[j].write_offset_addr = + adapter->ring_vir_addr + offset; + offset += sizeof(u32); + } + } + + if (unlikely(offset > adapter->ring_size)) { + dev_err(&pdev->dev, "offset(%d) > ring size(%d) !!\n", + offset, adapter->ring_size); + err = -1; + goto failed; + } + + return 0; +failed: + if (adapter->ring_vir_addr != NULL) { + pci_free_consistent(pdev, adapter->ring_size, + adapter->ring_vir_addr, adapter->ring_dma); + adapter->ring_vir_addr = NULL; + } + return err; +} + +static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter) +{ + + struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw; + struct atl1e_rx_ring *rx_ring = + (struct atl1e_rx_ring *)&adapter->rx_ring; + struct atl1e_tx_ring *tx_ring = + (struct atl1e_tx_ring *)&adapter->tx_ring; + struct atl1e_rx_page_desc *rx_page_desc = NULL; + int i, j; + + AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI, + (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32)); + AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO, + (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK)); + AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count)); + AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO, + (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK)); + + rx_page_desc = rx_ring->rx_page_desc; + /* RXF Page Physical address / Page Length */ + for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) { + AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i], + (u32)((adapter->ring_dma & + AT_DMA_HI_ADDR_MASK) >> 32)); + for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) { + u32 page_phy_addr; + u32 offset_phy_addr; + + page_phy_addr = rx_page_desc[i].rx_page[j].dma; + offset_phy_addr = + rx_page_desc[i].rx_page[j].write_offset_dma; + + AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j], + page_phy_addr & AT_DMA_LO_ADDR_MASK); + AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j], + offset_phy_addr & AT_DMA_LO_ADDR_MASK); + AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1); + } + } + /* Page Length */ + AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size); + /* Load all of base address above */ + AT_WRITE_REG(hw, REG_LOAD_PTR, 1); + + return; +} + +static inline void atl1e_configure_tx(struct atl1e_adapter *adapter) +{ + struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw; + u32 dev_ctrl_data = 0; + u32 max_pay_load = 0; + u32 jumbo_thresh = 0; + u32 extra_size = 0; /* Jumbo frame threshold in QWORD unit */ + + /* configure TXQ param */ + if (hw->nic_type != athr_l2e_revB) { + extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN; + if (hw->max_frame_size <= 1500) { + jumbo_thresh = hw->max_frame_size + extra_size; + } else if (hw->max_frame_size < 6*1024) { + jumbo_thresh = + (hw->max_frame_size + extra_size) * 2 / 3; + } else { + jumbo_thresh = (hw->max_frame_size + extra_size) / 2; + } + AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3); + } + + dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL); + + max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) & + DEVICE_CTRL_MAX_PAYLOAD_MASK; + + hw->dmaw_block = min(max_pay_load, hw->dmaw_block); + + max_pay_load = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) & + DEVICE_CTRL_MAX_RREQ_SZ_MASK; + hw->dmar_block = min(max_pay_load, hw->dmar_block); + + if (hw->nic_type != athr_l2e_revB) + AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2, + atl1e_pay_load_size[hw->dmar_block]); + /* enable TXQ */ + AT_WRITE_REGW(hw, REG_TXQ_CTRL, + (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK) + << TXQ_CTRL_NUM_TPD_BURST_SHIFT) + | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN); + return; +} + +static inline void atl1e_configure_rx(struct atl1e_adapter *adapter) +{ + struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw; + u32 rxf_len = 0; + u32 rxf_low = 0; + u32 rxf_high = 0; + u32 rxf_thresh_data = 0; + u32 rxq_ctrl_data = 0; + + if (hw->nic_type != athr_l2e_revB) { + AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM, + (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) << + RXQ_JMBOSZ_TH_SHIFT | + (1 & RXQ_JMBO_LKAH_MASK) << + RXQ_JMBO_LKAH_SHIFT)); + + rxf_len = AT_READ_REG(hw, REG_SRAM_RXF_LEN); + rxf_high = rxf_len * 4 / 5; + rxf_low = rxf_len / 5; + rxf_thresh_data = ((rxf_high & RXQ_RXF_PAUSE_TH_HI_MASK) + << RXQ_RXF_PAUSE_TH_HI_SHIFT) | + ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK) + << RXQ_RXF_PAUSE_TH_LO_SHIFT); + + AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data); + } + + /* RRS */ + AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab); + AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu); + + if (hw->rrs_type & atl1e_rrs_ipv4) + rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4; + + if (hw->rrs_type & atl1e_rrs_ipv4_tcp) + rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP; + + if (hw->rrs_type & atl1e_rrs_ipv6) + rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6; + + if (hw->rrs_type & atl1e_rrs_ipv6_tcp) + rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP; + + if (hw->rrs_type != atl1e_rrs_disable) + rxq_ctrl_data |= + (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT); + + rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 | + RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN; + + AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); + return; +} + +static inline void atl1e_configure_dma(struct atl1e_adapter *adapter) +{ + struct atl1e_hw *hw = &adapter->hw; + u32 dma_ctrl_data = 0; + + dma_ctrl_data = DMA_CTRL_RXCMB_EN; + dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK) + << DMA_CTRL_DMAR_BURST_LEN_SHIFT; + dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK) + << DMA_CTRL_DMAW_BURST_LEN_SHIFT; + dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER; + dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK) + << DMA_CTRL_DMAR_DLY_CNT_SHIFT; + dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK) + << DMA_CTRL_DMAW_DLY_CNT_SHIFT; + + AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); + return; +} + +static inline void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter) +{ + u32 value; + struct atl1e_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + + /* Config MAC CTRL Register */ + value = MAC_CTRL_TX_EN | + MAC_CTRL_RX_EN ; + + if (FULL_DUPLEX == adapter->link_duplex) + value |= MAC_CTRL_DUPLX; + + value |= ((u32)((SPEED_1000 == adapter->link_speed) ? + MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) << + MAC_CTRL_SPEED_SHIFT); + value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW); + + value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD); + value |= (((u32)adapter->hw.preamble_len & + MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT); + + if (adapter->vlgrp) + value |= MAC_CTRL_RMV_VLAN; + + value |= MAC_CTRL_BC_EN; + if (netdev->flags & IFF_PROMISC) + value |= MAC_CTRL_PROMIS_EN; + if (netdev->flags & IFF_ALLMULTI) + value |= MAC_CTRL_MC_ALL_EN; + + AT_WRITE_REG(hw, REG_MAC_CTRL, value); +} + +/* + * atl1e_configure - Configure Transmit&Receive Unit after Reset + * @adapter: board private structure + * + * Configure the Tx /Rx unit of the MAC after a reset. + */ +static int atl1e_configure(struct atl1e_adapter *adapter) +{ + struct atl1e_hw *hw = &adapter->hw; + struct pci_dev *pdev = adapter->pdev; + + u32 intr_status_data = 0; + + /* clear interrupt status */ + AT_WRITE_REG(hw, REG_ISR, ~0); + + /* 1. set MAC Address */ + atl1e_hw_set_mac_addr(hw); + + /* 2. Init the Multicast HASH table done by set_muti */ + + /* 3. Clear any WOL status */ + AT_WRITE_REG(hw, REG_WOL_CTRL, 0); + + /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr + * TPD Ring/SMB/RXF0 Page CMBs, they use the same + * High 32bits memory */ + atl1e_configure_des_ring(adapter); + + /* 5. set Interrupt Moderator Timer */ + AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt); + AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt); + AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE | + MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN); + + /* 6. rx/tx threshold to trig interrupt */ + AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh); + AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh); + AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down); + AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down); + + /* 7. set Interrupt Clear Timer */ + AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict); + + /* 8. set MTU */ + AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + + VLAN_HLEN + ETH_FCS_LEN); + + /* 9. config TXQ early tx threshold */ + atl1e_configure_tx(adapter); + + /* 10. config RXQ */ + atl1e_configure_rx(adapter); + + /* 11. config DMA Engine */ + atl1e_configure_dma(adapter); + + /* 12. smb timer to trig interrupt */ + AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer); + + intr_status_data = AT_READ_REG(hw, REG_ISR); + if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) { + dev_err(&pdev->dev, "atl1e_configure failed," + "PCIE phy link down\n"); + return -1; + } + + AT_WRITE_REG(hw, REG_ISR, 0x7fffffff); + return 0; +} + +/* + * atl1e_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 *atl1e_get_stats(struct net_device *netdev) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + struct atl1e_hw_stats *hw_stats = &adapter->hw_stats; + struct net_device_stats *net_stats = &adapter->net_stats; + + net_stats->rx_packets = hw_stats->rx_ok; + net_stats->tx_packets = hw_stats->tx_ok; + net_stats->rx_bytes = hw_stats->rx_byte_cnt; + net_stats->tx_bytes = hw_stats->tx_byte_cnt; + net_stats->multicast = hw_stats->rx_mcast; + net_stats->collisions = hw_stats->tx_1_col + + hw_stats->tx_2_col * 2 + + hw_stats->tx_late_col + hw_stats->tx_abort_col; + + net_stats->rx_errors = hw_stats->rx_frag + hw_stats->rx_fcs_err + + hw_stats->rx_len_err + hw_stats->rx_sz_ov + + hw_stats->rx_rrd_ov + hw_stats->rx_align_err; + net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; + net_stats->rx_length_errors = hw_stats->rx_len_err; + net_stats->rx_crc_errors = hw_stats->rx_fcs_err; + net_stats->rx_frame_errors = hw_stats->rx_align_err; + net_stats->rx_over_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov; + + net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov; + + net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col + + hw_stats->tx_underrun + hw_stats->tx_trunc; + net_stats->tx_fifo_errors = hw_stats->tx_underrun; + net_stats->tx_aborted_errors = hw_stats->tx_abort_col; + net_stats->tx_window_errors = hw_stats->tx_late_col; + + return &adapter->net_stats; +} + +static void atl1e_update_hw_stats(struct atl1e_adapter *adapter) +{ + u16 hw_reg_addr = 0; + unsigned long *stats_item = NULL; + + /* update rx status */ + hw_reg_addr = REG_MAC_RX_STATUS_BIN; + stats_item = &adapter->hw_stats.rx_ok; + while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { + *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr); + stats_item++; + hw_reg_addr += 4; + } + /* update tx status */ + hw_reg_addr = REG_MAC_TX_STATUS_BIN; + stats_item = &adapter->hw_stats.tx_ok; + while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { + *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr); + stats_item++; + hw_reg_addr += 4; + } +} + +static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter) +{ + u16 phy_data; + + spin_lock(&adapter->mdio_lock); + atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data); + spin_unlock(&adapter->mdio_lock); +} + +static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter) +{ + struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *) + &adapter->tx_ring; + struct atl1e_tx_buffer *tx_buffer = NULL; + u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX); + u16 next_to_clean = atomic_read(&tx_ring->next_to_clean); + + while (next_to_clean != hw_next_to_clean) { + tx_buffer = &tx_ring->tx_buffer[next_to_clean]; + if (tx_buffer->dma) { + pci_unmap_page(adapter->pdev, tx_buffer->dma, + tx_buffer->length, PCI_DMA_TODEVICE); + tx_buffer->dma = 0; + } + + if (tx_buffer->skb) { + dev_kfree_skb_irq(tx_buffer->skb); + tx_buffer->skb = NULL; + } + + if (++next_to_clean == tx_ring->count) + next_to_clean = 0; + } + + atomic_set(&tx_ring->next_to_clean, next_to_clean); + + if (netif_queue_stopped(adapter->netdev) && + netif_carrier_ok(adapter->netdev)) { + netif_wake_queue(adapter->netdev); + } + + return true; +} + +/* + * atl1e_intr - Interrupt Handler + * @irq: interrupt number + * @data: pointer to a network interface device structure + * @pt_regs: CPU registers structure + */ +static irqreturn_t atl1e_intr(int irq, void *data) +{ + struct net_device *netdev = data; + struct atl1e_adapter *adapter = netdev_priv(netdev); + struct pci_dev *pdev = adapter->pdev; + struct atl1e_hw *hw = &adapter->hw; + int max_ints = AT_MAX_INT_WORK; + int handled = IRQ_NONE; + u32 status; + + do { + status = AT_READ_REG(hw, REG_ISR); + if ((status & IMR_NORMAL_MASK) == 0 || + (status & ISR_DIS_INT) != 0) { + if (max_ints != AT_MAX_INT_WORK) + handled = IRQ_HANDLED; + break; + } + /* link event */ + if (status & ISR_GPHY) + atl1e_clear_phy_int(adapter); + /* Ack ISR */ + AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); + + handled = IRQ_HANDLED; + /* check if PCIE PHY Link down */ + if (status & ISR_PHY_LINKDOWN) { + dev_err(&pdev->dev, + "pcie phy linkdown %x\n", status); + if (netif_running(adapter->netdev)) { + /* reset MAC */ + atl1e_irq_reset(adapter); + schedule_work(&adapter->reset_task); + break; + } + } + + /* check if DMA read/write error */ + if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) { + dev_err(&pdev->dev, + "PCIE DMA RW error (status = 0x%x)\n", + status); + atl1e_irq_reset(adapter); + schedule_work(&adapter->reset_task); + break; + } + + if (status & ISR_SMB) + atl1e_update_hw_stats(adapter); + + /* link event */ + if (status & (ISR_GPHY | ISR_MANUAL)) { + adapter->net_stats.tx_carrier_errors++; + atl1e_link_chg_event(adapter); + break; + } + + /* transmit event */ + if (status & ISR_TX_EVENT) + atl1e_clean_tx_irq(adapter); + + if (status & ISR_RX_EVENT) { + /* + * disable rx interrupts, without + * the synchronize_irq bit + */ + AT_WRITE_REG(hw, REG_IMR, + IMR_NORMAL_MASK & ~ISR_RX_EVENT); + AT_WRITE_FLUSH(hw); + if (likely(netif_rx_schedule_prep(netdev, + &adapter->napi))) + __netif_rx_schedule(netdev, &adapter->napi); + } + } while (--max_ints > 0); + /* re-enable Interrupt*/ + AT_WRITE_REG(&adapter->hw, REG_ISR, 0); + + return handled; +} + +static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter, + struct sk_buff *skb, struct atl1e_recv_ret_status *prrs) +{ + u8 *packet = (u8 *)(prrs + 1); + struct iphdr *iph; + u16 head_len = ETH_HLEN; + u16 pkt_flags; + u16 err_flags; + + skb->ip_summed = CHECKSUM_NONE; + pkt_flags = prrs->pkt_flag; + err_flags = prrs->err_flag; + if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) && + ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) { + if (pkt_flags & RRS_IS_IPV4) { + if (pkt_flags & RRS_IS_802_3) + head_len += 8; + iph = (struct iphdr *) (packet + head_len); + if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF)) + goto hw_xsum; + } + if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) { + skb->ip_summed = CHECKSUM_UNNECESSARY; + return; + } + } + +hw_xsum : + return; +} + +static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter, + u8 que) +{ + struct atl1e_rx_page_desc *rx_page_desc = + (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc; + u8 rx_using = rx_page_desc[que].rx_using; + + return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]); +} + +static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que, + int *work_done, int work_to_do) +{ + struct pci_dev *pdev = adapter->pdev; + struct net_device *netdev = adapter->netdev; + struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *) + &adapter->rx_ring; + struct atl1e_rx_page_desc *rx_page_desc = + (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc; + struct sk_buff *skb = NULL; + struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que); + u32 packet_size, write_offset; + struct atl1e_recv_ret_status *prrs; + + write_offset = *(rx_page->write_offset_addr); + if (likely(rx_page->read_offset < write_offset)) { + do { + if (*work_done >= work_to_do) + break; + (*work_done)++; + /* get new packet's rrs */ + prrs = (struct atl1e_recv_ret_status *) (rx_page->addr + + rx_page->read_offset); + /* check sequence number */ + if (prrs->seq_num != rx_page_desc[que].rx_nxseq) { + dev_err(&pdev->dev, + "rx sequence number" + " error (rx=%d) (expect=%d)\n", + prrs->seq_num, + rx_page_desc[que].rx_nxseq); + rx_page_desc[que].rx_nxseq++; + /* just for debug use */ + AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0, + (((u32)prrs->seq_num) << 16) | + rx_page_desc[que].rx_nxseq); + goto fatal_err; + } + rx_page_desc[que].rx_nxseq++; + + /* error packet */ + if (prrs->pkt_flag & RRS_IS_ERR_FRAME) { + if (prrs->err_flag & (RRS_ERR_BAD_CRC | + RRS_ERR_DRIBBLE | RRS_ERR_CODE | + RRS_ERR_TRUNC)) { + /* hardware error, discard this packet*/ + dev_err(&pdev->dev, + "rx packet desc error %x\n", + *((u32 *)prrs + 1)); + goto skip_pkt; + } + } + + packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) & + RRS_PKT_SIZE_MASK) - 4; /* CRC */ + skb = netdev_alloc_skb(netdev, + packet_size + NET_IP_ALIGN); + if (skb == NULL) { + dev_warn(&pdev->dev, "%s: Memory squeeze," + "deferring packet.\n", netdev->name); + goto skip_pkt; + } + skb_reserve(skb, NET_IP_ALIGN); + skb->dev = netdev; + memcpy(skb->data, (u8 *)(prrs + 1), packet_size); + skb_put(skb, packet_size); + skb->protocol = eth_type_trans(skb, netdev); + atl1e_rx_checksum(adapter, skb, prrs); + + if (unlikely(adapter->vlgrp && + (prrs->pkt_flag & RRS_IS_VLAN_TAG))) { + u16 vlan_tag = (prrs->vtag >> 4) | + ((prrs->vtag & 7) << 13) | + ((prrs->vtag & 8) << 9); + dev_dbg(&pdev->dev, + "RXD VLAN TAG<RRD>=0x%04x\n", + prrs->vtag); + vlan_hwaccel_receive_skb(skb, adapter->vlgrp, + vlan_tag); + } else { + netif_receive_skb(skb); + } + + netdev->last_rx = jiffies; +skip_pkt: + /* skip current packet whether it's ok or not. */ + rx_page->read_offset += + (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) & + RRS_PKT_SIZE_MASK) + + sizeof(struct atl1e_recv_ret_status) + 31) & + 0xFFFFFFE0); + + if (rx_page->read_offset >= rx_ring->page_size) { + /* mark this page clean */ + u16 reg_addr; + u8 rx_using; + + rx_page->read_offset = + *(rx_page->write_offset_addr) = 0; + rx_using = rx_page_desc[que].rx_using; + reg_addr = + atl1e_rx_page_vld_regs[que][rx_using]; + AT_WRITE_REGB(&adapter->hw, reg_addr, 1); + rx_page_desc[que].rx_using ^= 1; + rx_page = atl1e_get_rx_page(adapter, que); + } + write_offset = *(rx_page->write_offset_addr); + } while (rx_page->read_offset < write_offset); + } + + return; + +fatal_err: + if (!test_bit(__AT_DOWN, &adapter->flags)) + schedule_work(&adapter->reset_task); +} + +/* + * atl1e_clean - NAPI Rx polling callback + * @adapter: board private structure + */ +static int atl1e_clean(struct napi_struct *napi, int budget) +{ + struct atl1e_adapter *adapter = + container_of(napi, struct atl1e_adapter, napi); + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + u32 imr_data; + int work_done = 0; + + /* Keep link state information with original netdev */ + if (!netif_carrier_ok(adapter->netdev)) + goto quit_polling; + + atl1e_clean_rx_irq(adapter, 0, &work_done, budget); + + /* If no Tx and not enough Rx work done, exit the polling mode */ + if (work_done < budget) { +quit_polling: + netif_rx_complete(netdev, napi); + imr_data = AT_READ_REG(&adapter->hw, REG_IMR); + AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT); + /* test debug */ + if (test_bit(__AT_DOWN, &adapter->flags)) { + atomic_dec(&adapter->irq_sem); + dev_err(&pdev->dev, + "atl1e_clean is called when AT_DOWN\n"); + } + /* reenable RX intr */ + /*atl1e_irq_enable(adapter); */ + + } + return work_done; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER + +/* + * Polling 'interrupt' - used by things like netconsole to send skbs + * without having to re-enable interrupts. It's not called while + * the interrupt routine is executing. + */ +static void atl1e_netpoll(struct net_device *netdev) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + + disable_irq(adapter->pdev->irq); + atl1e_intr(adapter->pdev->irq, netdev); + enable_irq(adapter->pdev->irq); +} +#endif + +static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter) +{ + struct atl1e_tx_ring *tx_ring = &adapter->tx_ring; + u16 next_to_use = 0; + u16 next_to_clean = 0; + + next_to_clean = atomic_read(&tx_ring->next_to_clean); + next_to_use = tx_ring->next_to_use; + + return (u16)(next_to_clean > next_to_use) ? + (next_to_clean - next_to_use - 1) : + (tx_ring->count + next_to_clean - next_to_use - 1); +} + +/* + * get next usable tpd + * Note: should call atl1e_tdp_avail to make sure + * there is enough tpd to use + */ +static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter) +{ + struct atl1e_tx_ring *tx_ring = &adapter->tx_ring; + u16 next_to_use = 0; + + next_to_use = tx_ring->next_to_use; + if (++tx_ring->next_to_use == tx_ring->count) + tx_ring->next_to_use = 0; + + memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc)); + return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use]; +} + +static struct atl1e_tx_buffer * +atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd) +{ + struct atl1e_tx_ring *tx_ring = &adapter->tx_ring; + + return &tx_ring->tx_buffer[tpd - tx_ring->desc]; +} + +/* Calculate the transmit packet descript needed*/ +static u16 atl1e_cal_tdp_req(const struct sk_buff *skb) +{ + int i = 0; + u16 tpd_req = 1; + u16 fg_size = 0; + u16 proto_hdr_len = 0; + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + fg_size = skb_shinfo(skb)->frags[i].size; + tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT); + } + + if (skb_is_gso(skb)) { + if (skb->protocol == ntohs(ETH_P_IP) || + (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) { + proto_hdr_len = skb_transport_offset(skb) + + tcp_hdrlen(skb); + if (proto_hdr_len < skb_headlen(skb)) { + tpd_req += ((skb_headlen(skb) - proto_hdr_len + + MAX_TX_BUF_LEN - 1) >> + MAX_TX_BUF_SHIFT); + } + } + + } + return tpd_req; +} + +static int atl1e_tso_csum(struct atl1e_adapter *adapter, + struct sk_buff *skb, struct atl1e_tpd_desc *tpd) +{ + struct pci_dev *pdev = adapter->pdev; + u8 hdr_len; + u32 real_len; + unsigned short offload_type; + int err; + + if (skb_is_gso(skb)) { + if (skb_header_cloned(skb)) { + err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); + if (unlikely(err)) + return -1; + } + offload_type = skb_shinfo(skb)->gso_type; + + if (offload_type & SKB_GSO_TCPV4) { + real_len = (((unsigned char *)ip_hdr(skb) - skb->data) + + ntohs(ip_hdr(skb)->tot_len)); + + if (real_len < skb->len) + pskb_trim(skb, real_len); + + hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); + if (unlikely(skb->len == hdr_len)) { + /* only xsum need */ + dev_warn(&pdev->dev, + "IPV4 tso with zero data??\n"); + goto check_sum; + } else { + ip_hdr(skb)->check = 0; + ip_hdr(skb)->tot_len = 0; + tcp_hdr(skb)->check = ~csum_tcpudp_magic( + ip_hdr(skb)->saddr, + ip_hdr(skb)->daddr, + 0, IPPROTO_TCP, 0); + tpd->word3 |= (ip_hdr(skb)->ihl & + TDP_V4_IPHL_MASK) << + TPD_V4_IPHL_SHIFT; + tpd->word3 |= ((tcp_hdrlen(skb) >> 2) & + TPD_TCPHDRLEN_MASK) << + TPD_TCPHDRLEN_SHIFT; + tpd->word3 |= ((skb_shinfo(skb)->gso_size) & + TPD_MSS_MASK) << TPD_MSS_SHIFT; + tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT; + } + return 0; + } + + if (offload_type & SKB_GSO_TCPV6) { + real_len = (((unsigned char *)ipv6_hdr(skb) - skb->data) + + ntohs(ipv6_hdr(skb)->payload_len)); + if (real_len < skb->len) + pskb_trim(skb, real_len); + + /* check payload == 0 byte ? */ + hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); + if (unlikely(skb->len == hdr_len)) { + /* only xsum need */ + dev_warn(&pdev->dev, + "IPV6 tso with zero data??\n"); + goto check_sum; + } else { + tcp_hdr(skb)->check = ~csum_ipv6_magic( + &ipv6_hdr(skb)->saddr, + &ipv6_hdr(skb)->daddr, + 0, IPPROTO_TCP, 0); + tpd->word3 |= 1 << TPD_IP_VERSION_SHIFT; + hdr_len >>= 1; + tpd->word3 |= (hdr_len & TPD_V6_IPHLLO_MASK) << + TPD_V6_IPHLLO_SHIFT; + tpd->word3 |= ((hdr_len >> 3) & + TPD_V6_IPHLHI_MASK) << + TPD_V6_IPHLHI_SHIFT; + tpd->word3 |= (tcp_hdrlen(skb) >> 2 & + TPD_TCPHDRLEN_MASK) << + TPD_TCPHDRLEN_SHIFT; + tpd->word3 |= ((skb_shinfo(skb)->gso_size) & + TPD_MSS_MASK) << TPD_MSS_SHIFT; + tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT; + } + } + return 0; + } + +check_sum: + if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { + u8 css, cso; + + cso = skb_transport_offset(skb); + if (unlikely(cso & 0x1)) { + dev_err(&adapter->pdev->dev, + "pay load offset should not ant event number\n"); + return -1; + } else { + css = cso + skb->csum_offset; + tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) << + TPD_PLOADOFFSET_SHIFT; + tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) << + TPD_CCSUMOFFSET_SHIFT; + tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT; + } + } + + return 0; +} + +static void atl1e_tx_map(struct atl1e_adapter *adapter, + struct sk_buff *skb, struct atl1e_tpd_desc *tpd) +{ + struct atl1e_tpd_desc *use_tpd = NULL; + struct atl1e_tx_buffer *tx_buffer = NULL; + u16 buf_len = skb->len - skb->data_len; + u16 map_len = 0; + u16 mapped_len = 0; + u16 hdr_len = 0; + u16 nr_frags; + u16 f; + int segment; + + nr_frags = skb_shinfo(skb)->nr_frags; + segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK; + if (segment) { + /* TSO */ + map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); + use_tpd = tpd; + + tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd); + tx_buffer->length = map_len; + tx_buffer->dma = pci_map_single(adapter->pdev, + skb->data, hdr_len, PCI_DMA_TODEVICE); + mapped_len += map_len; + use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma); + use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) | + ((cpu_to_le32(tx_buffer->length) & + TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT); + } + + while (mapped_len < buf_len) { + /* mapped_len == 0, means we should use the first tpd, + which is given by caller */ + if (mapped_len == 0) { + use_tpd = tpd; + } else { + use_tpd = atl1e_get_tpd(adapter); + memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc)); + } + tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd); + tx_buffer->skb = NULL; + + tx_buffer->length = map_len = + ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ? + MAX_TX_BUF_LEN : (buf_len - mapped_len); + tx_buffer->dma = + pci_map_single(adapter->pdev, skb->data + mapped_len, + map_len, PCI_DMA_TODEVICE); + mapped_len += map_len; + use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma); + use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) | + ((cpu_to_le32(tx_buffer->length) & + TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT); + } + + for (f = 0; f < nr_frags; f++) { + struct skb_frag_struct *frag; + u16 i; + u16 seg_num; + + frag = &skb_shinfo(skb)->frags[f]; + buf_len = frag->size; + + seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN; + for (i = 0; i < seg_num; i++) { + use_tpd = atl1e_get_tpd(adapter); + memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc)); + + tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd); + if (tx_buffer->skb) + BUG(); + + tx_buffer->skb = NULL; + tx_buffer->length = + (buf_len > MAX_TX_BUF_LEN) ? + MAX_TX_BUF_LEN : buf_len; + buf_len -= tx_buffer->length; + + tx_buffer->dma = + pci_map_page(adapter->pdev, frag->page, + frag->page_offset + + (i * MAX_TX_BUF_LEN), + tx_buffer->length, + PCI_DMA_TODEVICE); + use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma); + use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) | + ((cpu_to_le32(tx_buffer->length) & + TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT); + } + } + + if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK) + /* note this one is a tcp header */ + tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT; + /* The last tpd */ + + use_tpd->word3 |= 1 << TPD_EOP_SHIFT; + /* The last buffer info contain the skb address, + so it will be free after unmap */ + tx_buffer->skb = skb; +} + +static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count, + struct atl1e_tpd_desc *tpd) +{ + struct atl1e_tx_ring *tx_ring = &adapter->tx_ring; + /* 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(); + AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use); +} + +static int atl1e_xmit_frame(struct sk_buff *skb, struct net_device *netdev) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + unsigned long flags; + u16 tpd_req = 1; + struct atl1e_tpd_desc *tpd; + + if (test_bit(__AT_DOWN, &adapter->flags)) { + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + + if (unlikely(skb->len <= 0)) { + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + tpd_req = atl1e_cal_tdp_req(skb); + if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) + return NETDEV_TX_LOCKED; + + if (atl1e_tpd_avail(adapter) < tpd_req) { + /* no enough descriptor, just stop queue */ + netif_stop_queue(netdev); + spin_unlock_irqrestore(&adapter->tx_lock, flags); + return NETDEV_TX_BUSY; + } + + tpd = atl1e_get_tpd(adapter); + + if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) { + u16 vlan_tag = vlan_tx_tag_get(skb); + u16 atl1e_vlan_tag; + + tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT; + AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag); + tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) << + TPD_VLAN_SHIFT; + } + + if (skb->protocol == ntohs(ETH_P_8021Q)) + tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT; + + if (skb_network_offset(skb) != ETH_HLEN) + tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */ + + /* do TSO and check sum */ + if (atl1e_tso_csum(adapter, skb, tpd) != 0) { + spin_unlock_irqrestore(&adapter->tx_lock, flags); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + + atl1e_tx_map(adapter, skb, tpd); + atl1e_tx_queue(adapter, tpd_req, tpd); + + netdev->trans_start = jiffies; + spin_unlock_irqrestore(&adapter->tx_lock, flags); + return NETDEV_TX_OK; +} + +static void atl1e_free_irq(struct atl1e_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + + free_irq(adapter->pdev->irq, netdev); + + if (adapter->have_msi) + pci_disable_msi(adapter->pdev); +} + +static int atl1e_request_irq(struct atl1e_adapter *adapter) +{ + struct pci_dev *pdev = adapter->pdev; + struct net_device *netdev = adapter->netdev; + int flags = 0; + int err = 0; + + adapter->have_msi = true; + err = pci_enable_msi(adapter->pdev); + if (err) { + dev_dbg(&pdev->dev, + "Unable to allocate MSI interrupt Error: %d\n", err); + adapter->have_msi = false; + } else + netdev->irq = pdev->irq; + + + if (!adapter->have_msi) + flags |= IRQF_SHARED; + err = request_irq(adapter->pdev->irq, &atl1e_intr, flags, + netdev->name, netdev); + if (err) { + dev_dbg(&pdev->dev, + "Unable to allocate interrupt Error: %d\n", err); + if (adapter->have_msi) + pci_disable_msi(adapter->pdev); + return err; + } + dev_dbg(&pdev->dev, "atl1e_request_irq OK\n"); + return err; +} + +int atl1e_up(struct atl1e_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int err = 0; + u32 val; + + /* hardware has been reset, we need to reload some things */ + err = atl1e_init_hw(&adapter->hw); + if (err) { + err = -EIO; + return err; + } + atl1e_init_ring_ptrs(adapter); + atl1e_set_multi(netdev); + atl1e_restore_vlan(adapter); + + if (atl1e_configure(adapter)) { + err = -EIO; + goto err_up; + } + + clear_bit(__AT_DOWN, &adapter->flags); + napi_enable(&adapter->napi); + atl1e_irq_enable(adapter); + val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL); + AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL, + val | MASTER_CTRL_MANUAL_INT); + +err_up: + return err; +} + +void atl1e_down(struct atl1e_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + + /* signal that we're down so the interrupt handler does not + * reschedule our watchdog timer */ + set_bit(__AT_DOWN, &adapter->flags); + +#ifdef NETIF_F_LLTX + netif_stop_queue(netdev); +#else + netif_tx_disable(netdev); +#endif + + /* reset MAC to disable all RX/TX */ + atl1e_reset_hw(&adapter->hw); + msleep(1); + + napi_disable(&adapter->napi); + atl1e_del_timer(adapter); + atl1e_irq_disable(adapter); + + netif_carrier_off(netdev); + adapter->link_speed = SPEED_0; + adapter->link_duplex = -1; + atl1e_clean_tx_ring(adapter); + atl1e_clean_rx_ring(adapter); +} + +/* + * atl1e_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 atl1e_open(struct net_device *netdev) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + int err; + + /* disallow open during test */ + if (test_bit(__AT_TESTING, &adapter->flags)) + return -EBUSY; + + /* allocate rx/tx dma buffer & descriptors */ + atl1e_init_ring_resources(adapter); + err = atl1e_setup_ring_resources(adapter); + if (unlikely(err)) + return err; + + err = atl1e_request_irq(adapter); + if (unlikely(err)) + goto err_req_irq; + + err = atl1e_up(adapter); + if (unlikely(err)) + goto err_up; + + return 0; + +err_up: + atl1e_free_irq(adapter); +err_req_irq: + atl1e_free_ring_resources(adapter); + atl1e_reset_hw(&adapter->hw); + + return err; +} + +/* + * atl1e_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 atl1e_close(struct net_device *netdev) +{ + struct atl1e_adapter *adapter = netdev_priv(netdev); + + WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); + atl1e_down(adapter); + atl1e_free_irq(adapter); + atl1e_free_ring_resources(adapter); + + return 0; +} + +#ifdef CONFIG_PM +static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct atl1e_adapter *adapter = netdev_priv(netdev); + struct atl1e_hw *hw = &adapter->hw; + u32 ctrl = 0; + u32 mac_ctrl_data = 0; + u32 wol_ctrl_data = 0; + u16 mii_advertise_data = 0; + u16 mii_bmsr_data = 0; + u16 mii_intr_status_data = 0; + u32 wufc = adapter->wol; + u32 i; +#ifdef CONFIG_PM + int retval = 0; +#endif + + if (netif_running(netdev)) { + WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); + atl1e_down(adapter); + } + netif_device_detach(netdev); + +#ifdef CONFIG_PM + retval = pci_save_state(pdev); + if (retval) + return retval; +#endif + + if (wufc) { + /* get link status */ + atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data); + atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data); + + mii_advertise_data = MII_AR_10T_HD_CAPS; + + if ((atl1e_write_phy_reg(hw, MII_AT001_CR, 0) != 0) || + (atl1e_write_phy_reg(hw, + MII_ADVERTISE, mii_advertise_data) != 0) || + (atl1e_phy_commit(hw)) != 0) { + dev_dbg(&pdev->dev, "set phy register failed\n"); + goto wol_dis; + } + + hw->phy_configured = false; /* re-init PHY when resume */ + + /* turn on magic packet wol */ + if (wufc & AT_WUFC_MAG) + wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN; + + if (wufc & AT_WUFC_LNKC) { + /* if orignal link status is link, just wait for retrive link */ + if (mii_bmsr_data & BMSR_LSTATUS) { + for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) { + msleep(100); + atl1e_read_phy_reg(hw, MII_BMSR, + (u16 *)&mii_bmsr_data); + if (mii_bmsr_data & BMSR_LSTATUS) + break; + } + + if ((mii_bmsr_data & BMSR_LSTATUS) == 0) + dev_dbg(&pdev->dev, + "%s: Link may change" + "when suspend\n", + atl1e_driver_name); + } + wol_ctrl_data |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN; + /* only link up can wake up */ + if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) { + dev_dbg(&pdev->dev, "%s: read write phy " + "register failed.\n", + atl1e_driver_name); + goto wol_dis; + } + } + /* clear phy interrupt */ + atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data); + /* Config MAC Ctrl register */ + mac_ctrl_data = MAC_CTRL_RX_EN; + /* set to 10/100M halt duplex */ + mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT; + mac_ctrl_data |= (((u32)adapter->hw.preamble_len & + MAC_CTRL_PRMLEN_MASK) << + MAC_CTRL_PRMLEN_SHIFT); + + if (adapter->vlgrp) + mac_ctrl_data |= MAC_CTRL_RMV_VLAN; + + /* magic packet maybe Broadcast&multicast&Unicast frame */ + if (wufc & AT_WUFC_MAG) + mac_ctrl_data |= MAC_CTRL_BC_EN; + + dev_dbg(&pdev->dev, + "%s: suspend MAC=0x%x\n", + atl1e_driver_name, mac_ctrl_data); + + AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data); + AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); + /* pcie patch */ + ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC); + ctrl |= PCIE_PHYMISC_FORCE_RCV_DET; + AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl); + pci_enable_wake(pdev, pci_choose_state(pdev, state), 1); + goto suspend_exit; + } +wol_dis: + + /* WOL disabled */ + AT_WRITE_REG(hw, REG_WOL_CTRL, 0); + + /* pcie patch */ + ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC); + ctrl |= PCIE_PHYMISC_FORCE_RCV_DET; + AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl); + + atl1e_force_ps(hw); + hw->phy_configured = false; /* re-init PHY when resume */ + + pci_enable_wake(pdev, pci_choose_state(pdev, state), 0); + +suspend_exit: + + if (netif_running(netdev)) + atl1e_free_irq(adapter); + + pci_disable_device(pdev); + + pci_set_power_state(pdev, pci_choose_state(pdev, state)); + + return 0; +} + +static int atl1e_resume(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct atl1e_adapter *adapter = netdev_priv(netdev); + u32 err; + + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + + err = pci_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "ATL1e: Cannot enable PCI" + " device from suspend\n"); + return err; + } + + pci_set_master(pdev); + + AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */ + + pci_enable_wake(pdev, PCI_D3hot, 0); + pci_enable_wake(pdev, PCI_D3cold, 0); + + AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); + + if (netif_running(netdev)) + err = atl1e_request_irq(adapter); + if (err) + return err; + + atl1e_reset_hw(&adapter->hw); + + if (netif_running(netdev)) + atl1e_up(adapter); + + netif_device_attach(netdev); + + return 0; +} +#endif + +static void atl1e_shutdown(struct pci_dev *pdev) +{ + atl1e_suspend(pdev, PMSG_SUSPEND); +} + +static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev) +{ + SET_NETDEV_DEV(netdev, &pdev->dev); + pci_set_drvdata(pdev, netdev); + + netdev->irq = pdev->irq; + netdev->open = &atl1e_open; + netdev->stop = &atl1e_close; + netdev->hard_start_xmit = &atl1e_xmit_frame; + netdev->get_stats = &atl1e_get_stats; + netdev->set_multicast_list = &atl1e_set_multi; + netdev->set_mac_address = &atl1e_set_mac_addr; + netdev->change_mtu = &atl1e_change_mtu; + netdev->do_ioctl = &atl1e_ioctl; + netdev->tx_timeout = &atl1e_tx_timeout; + netdev->watchdog_timeo = AT_TX_WATCHDOG; + netdev->vlan_rx_register = atl1e_vlan_rx_register; +#ifdef CONFIG_NET_POLL_CONTROLLER + netdev->poll_controller = atl1e_netpoll; +#endif + atl1e_set_ethtool_ops(netdev); + + netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | + NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; + netdev->features |= NETIF_F_LLTX; + netdev->features |= NETIF_F_TSO; + netdev->features |= NETIF_F_TSO6; + + return 0; +} + +/* + * atl1e_probe - Device Initialization Routine + * @pdev: PCI device information struct + * @ent: entry in atl1e_pci_tbl + * + * Returns 0 on success, negative on failure + * + * atl1e_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 atl1e_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct net_device *netdev; + struct atl1e_adapter *adapter = NULL; + static int cards_found; + + int err = 0; + + err = pci_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "cannot enable PCI device\n"); + return err; + } + + /* + * The atl1e chip can DMA to 64-bit addresses, but it uses a single + * shared register for the high 32 bits, so only a single, aligned, + * 4 GB physical address range can be used at a time. + * + * Supporting 64-bit DMA on this hardware is more trouble than it's + * worth. It is far easier to limit to 32-bit DMA than update + * various kernel subsystems to support the mechanics required by a + * fixed-high-32-bit system. + */ + if ((pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) || + (pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) != 0)) { + dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); + goto err_dma; + } + + err = pci_request_regions(pdev, atl1e_driver_name); + if (err) { + dev_err(&pdev->dev, "cannot obtain PCI resources\n"); + goto err_pci_reg; + } + + pci_set_master(pdev); + + netdev = alloc_etherdev(sizeof(struct atl1e_adapter)); + if (netdev == NULL) { + err = -ENOMEM; + dev_err(&pdev->dev, "etherdev alloc failed\n"); + goto err_alloc_etherdev; + } + + err = atl1e_init_netdev(netdev, pdev); + if (err) { + dev_err(&pdev->dev, "init netdevice failed\n"); + goto err_init_netdev; + } + adapter = netdev_priv(netdev); + adapter->bd_number = cards_found; + adapter->netdev = netdev; + adapter->pdev = pdev; + adapter->hw.adapter = adapter; + adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0); + if (!adapter->hw.hw_addr) { + err = -EIO; + dev_err(&pdev->dev, "cannot map device registers\n"); + goto err_ioremap; + } + netdev->base_addr = (unsigned long)adapter->hw.hw_addr; + + /* init mii data */ + adapter->mii.dev = netdev; + adapter->mii.mdio_read = atl1e_mdio_read; + adapter->mii.mdio_write = atl1e_mdio_write; + adapter->mii.phy_id_mask = 0x1f; + adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK; + + netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64); + + init_timer(&adapter->phy_config_timer); + adapter->phy_config_timer.function = &atl1e_phy_config; + adapter->phy_config_timer.data = (unsigned long) adapter; + + /* get user settings */ + atl1e_check_options(adapter); + /* + * Mark all PCI regions associated with PCI device + * pdev as being reserved by owner atl1e_driver_name + * Enables bus-mastering on the device and calls + * pcibios_set_master to do the needed arch specific settings + */ + atl1e_setup_pcicmd(pdev); + /* setup the private structure */ + err = atl1e_sw_init(adapter); + if (err) { + dev_err(&pdev->dev, "net device private data init failed\n"); + goto err_sw_init; + } + + /* Init GPHY as early as possible due to power saving issue */ + spin_lock(&adapter->mdio_lock); + atl1e_phy_init(&adapter->hw); + spin_unlock(&adapter->mdio_lock); + /* reset the controller to + * put the device in a known good starting state */ + err = atl1e_reset_hw(&adapter->hw); + if (err) { + err = -EIO; + goto err_reset; + } + + if (atl1e_read_mac_addr(&adapter->hw) != 0) { + err = -EIO; + dev_err(&pdev->dev, "get mac address failed\n"); + goto err_eeprom; + } + + memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); + memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len); + dev_dbg(&pdev->dev, "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n", + adapter->hw.mac_addr[0], adapter->hw.mac_addr[1], + adapter->hw.mac_addr[2], adapter->hw.mac_addr[3], + adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]); + + INIT_WORK(&adapter->reset_task, atl1e_reset_task); + INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task); + err = register_netdev(netdev); + if (err) { + dev_err(&pdev->dev, "register netdevice failed\n"); + goto err_register; + } + + /* assume we have no link for now */ + netif_stop_queue(netdev); + netif_carrier_off(netdev); + + cards_found++; + + return 0; + +err_reset: +err_register: +err_sw_init: +err_eeprom: + iounmap(adapter->hw.hw_addr); +err_init_netdev: +err_ioremap: + free_netdev(netdev); +err_alloc_etherdev: + pci_release_regions(pdev); +err_pci_reg: +err_dma: + pci_disable_device(pdev); + return err; +} + +/* + * atl1e_remove - Device Removal Routine + * @pdev: PCI device information struct + * + * atl1e_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 atl1e_remove(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct atl1e_adapter *adapter = netdev_priv(netdev); + + /* + * flush_scheduled work may reschedule our watchdog task, so + * explicitly disable watchdog tasks from being rescheduled + */ + set_bit(__AT_DOWN, &adapter->flags); + + atl1e_del_timer(adapter); + atl1e_cancel_work(adapter); + + unregister_netdev(netdev); + atl1e_free_ring_resources(adapter); + atl1e_force_ps(&adapter->hw); + iounmap(adapter->hw.hw_addr); + pci_release_regions(pdev); + free_netdev(netdev); + pci_disable_device(pdev); +} + +/* + * atl1e_io_error_detected - called when PCI error is detected + * @pdev: Pointer to PCI device + * @state: The current pci connection state + * + * This function is called after a PCI bus error affecting + * this device has been detected. + */ +static pci_ers_result_t +atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct atl1e_adapter *adapter = netdev->priv; + + netif_device_detach(netdev); + + if (netif_running(netdev)) + atl1e_down(adapter); + + pci_disable_device(pdev); + + /* Request a slot slot reset. */ + return PCI_ERS_RESULT_NEED_RESET; +} + +/* + * atl1e_io_slot_reset - called after the pci bus has been reset. + * @pdev: Pointer to PCI device + * + * Restart the card from scratch, as if from a cold-boot. Implementation + * resembles the first-half of the e1000_resume routine. + */ +static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct atl1e_adapter *adapter = netdev->priv; + + if (pci_enable_device(pdev)) { + dev_err(&pdev->dev, + "ATL1e: Cannot re-enable PCI device after reset.\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + pci_set_master(pdev); + + pci_enable_wake(pdev, PCI_D3hot, 0); + pci_enable_wake(pdev, PCI_D3cold, 0); + + atl1e_reset_hw(&adapter->hw); + + return PCI_ERS_RESULT_RECOVERED; +} + +/* + * atl1e_io_resume - called when traffic can start flowing again. + * @pdev: Pointer to PCI device + * + * This callback is called when the error recovery driver tells us that + * its OK to resume normal operation. Implementation resembles the + * second-half of the atl1e_resume routine. + */ +static void atl1e_io_resume(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct atl1e_adapter *adapter = netdev->priv; + + if (netif_running(netdev)) { + if (atl1e_up(adapter)) { + dev_err(&pdev->dev, + "ATL1e: can't bring device back up after reset\n"); + return; + } + } + + netif_device_attach(netdev); +} + +static struct pci_error_handlers atl1e_err_handler = { + .error_detected = atl1e_io_error_detected, + .slot_reset = atl1e_io_slot_reset, + .resume = atl1e_io_resume, +}; + +static struct pci_driver atl1e_driver = { + .name = atl1e_driver_name, + .id_table = atl1e_pci_tbl, + .probe = atl1e_probe, + .remove = __devexit_p(atl1e_remove), + /* Power Managment Hooks */ +#ifdef CONFIG_PM + .suspend = atl1e_suspend, + .resume = atl1e_resume, +#endif + .shutdown = atl1e_shutdown, + .err_handler = &atl1e_err_handler +}; + +/* + * atl1e_init_module - Driver Registration Routine + * + * atl1e_init_module is the first routine called when the driver is + * loaded. All it does is register with the PCI subsystem. + */ +static int __init atl1e_init_module(void) +{ + return pci_register_driver(&atl1e_driver); +} + +/* + * atl1e_exit_module - Driver Exit Cleanup Routine + * + * atl1e_exit_module is called just before the driver is removed + * from memory. + */ +static void __exit atl1e_exit_module(void) +{ + pci_unregister_driver(&atl1e_driver); +} + +module_init(atl1e_init_module); +module_exit(atl1e_exit_module); |