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linux/drivers/net/atl1e/atl1e_main.c
Michał Mirosław 0d0b16727f net: Fix drivers advertising HW_CSUM feature to use csum_start 
Some drivers are using skb_transport_offset(skb) instead of skb->csum_start
for NETIF_F_HW_CSUM offload.  This does not matter now, but if someone
implements checksumming of encapsulated packets then this will break silently.

TSO output paths are left as they are, since they are for IP+TCP only
(might be worth converting though).

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-16 14:43:15 -08:00

2545 lines
68 KiB
C
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/*
* 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 DEFINE_PCI_DEVICE_TABLE(atl1e_pci_tbl) = {
{PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
{PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
/* 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 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;
int err = 0;
u16 speed, duplex, phy_data;
/* MII_BMSR must read twice */
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);
netdev_info(netdev,
"NIC Link is Up <%d Mbps %s Duplex>\n",
adapter->link_speed,
adapter->link_duplex == FULL_DUPLEX ?
"Full" : "Half");
}
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;
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 */
netdev_info(netdev, "NIC Link is Down\n");
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 netdev_hw_addr *ha;
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 */
netdev_for_each_mc_addr(ha, netdev) {
hash_value = atl1e_hash_mc_addr(hw, ha->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);
u32 mac_ctrl_data = 0;
netdev_dbg(adapter->netdev, "%s\n", __func__);
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)
{
netdev_dbg(adapter->netdev, "%s\n", __func__);
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)) {
netdev_warn(adapter->netdev, "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 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 (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
&data->val_out)) {
retval = -EIO;
goto out;
}
break;
case SIOCSMIIREG:
if (data->reg_num & ~(0x1F)) {
retval = -EFAULT;
goto out;
}
netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
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)) {
netdev_err(adapter->netdev, "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) {
if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
pci_unmap_single(pdev, tx_buffer->dma,
tx_buffer->length, PCI_DMA_TODEVICE);
else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
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);
}
/*
* 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) {
netdev_err(adapter->netdev,
"pci_alloc_consistent failed, size = D%d\n", 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) {
netdev_err(adapter->netdev, "kzalloc failed, size = D%d\n",
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)) {
netdev_err(adapter->netdev, "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);
}
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);
}
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);
}
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);
}
static 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;
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)) {
netdev_err(adapter->netdev,
"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 = &netdev->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 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) {
if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
pci_unmap_single(adapter->pdev, tx_buffer->dma,
tx_buffer->length, PCI_DMA_TODEVICE);
else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
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 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) {
netdev_err(adapter->netdev,
"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)) {
netdev_err(adapter->netdev,
"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)) {
netdev->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(napi_schedule_prep(
&adapter->napi)))
__napi_schedule(&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_checksum_none_assert(skb);
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 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) {
netdev_err(netdev,
"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*/
netdev_err(netdev,
"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_ip_align(netdev, packet_size);
if (skb == NULL) {
netdev_warn(netdev,
"Memory squeeze, deferring packet\n");
goto skip_pkt;
}
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);
netdev_dbg(netdev,
"RXD VLAN TAG<RRD>=0x%04x\n",
prrs->vtag);
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
vlan_tag);
} else {
netif_receive_skb(skb);
}
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);
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:
napi_complete(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);
netdev_err(adapter->netdev,
"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 == htons(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)
{
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 */
netdev_warn(adapter->netdev,
"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;
}
}
check_sum:
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
u8 css, cso;
cso = skb_checksum_start_offset(skb);
if (unlikely(cso & 0x1)) {
netdev_err(adapter->netdev,
"payload 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_headlen(skb);
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);
ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
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);
ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
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);
BUG_ON(tx_buffer->skb);
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);
ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
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 netdev_tx_t 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(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 == htons(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; /* NETIF_F_LLTX driver :( */
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) {
netdev_dbg(adapter->netdev,
"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) {
netdev_dbg(adapter->netdev,
"Unable to allocate interrupt Error: %d\n", err);
if (adapter->have_msi)
pci_disable_msi(adapter->pdev);
return err;
}
netdev_dbg(adapter->netdev, "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;
}
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) {
netdev_dbg(adapter->netdev, "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)
netdev_dbg(adapter->netdev,
"Link may change when suspend\n");
}
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) {
netdev_dbg(adapter->netdev,
"read write phy register failed\n");
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;
netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
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;
}
#ifdef CONFIG_PM
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) {
netdev_err(adapter->netdev,
"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 const struct net_device_ops atl1e_netdev_ops = {
.ndo_open = atl1e_open,
.ndo_stop = atl1e_close,
.ndo_start_xmit = atl1e_xmit_frame,
.ndo_get_stats = atl1e_get_stats,
.ndo_set_multicast_list = atl1e_set_multi,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = atl1e_set_mac_addr,
.ndo_change_mtu = atl1e_change_mtu,
.ndo_do_ioctl = atl1e_ioctl,
.ndo_tx_timeout = atl1e_tx_timeout,
.ndo_vlan_rx_register = atl1e_vlan_rx_register,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = atl1e_netpoll,
#endif
};
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->netdev_ops = &atl1e_netdev_ops;
netdev->watchdog_timeo = AT_TX_WATCHDOG;
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;
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_BIT_MASK(32)) != 0) ||
(pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 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) {
netdev_err(netdev, "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;
netdev_err(netdev, "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) {
netdev_err(netdev, "net device private data init failed\n");
goto err_sw_init;
}
/* Init GPHY as early as possible due to power saving issue */
atl1e_phy_init(&adapter->hw);
/* 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;
netdev_err(netdev, "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);
netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
INIT_WORK(&adapter->reset_task, atl1e_reset_task);
INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
err = register_netdev(netdev);
if (err) {
netdev_err(netdev, "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(netdev);
netif_device_detach(netdev);
if (state == pci_channel_io_perm_failure)
return PCI_ERS_RESULT_DISCONNECT;
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(netdev);
if (pci_enable_device(pdev)) {
netdev_err(adapter->netdev,
"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(netdev);
if (netif_running(netdev)) {
if (atl1e_up(adapter)) {
netdev_err(adapter->netdev,
"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);
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