/*******************************************************************************
Copyright(c) 1999 - 2003 Intel Corporation. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The full GNU General Public License is included in this distribution in the
file called LICENSE.
Contact Information:
Linux NICS <linux.nics@intel.com>
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*******************************************************************************/
#define __IXGB_MAIN__
#include "ixgb.h"
char ixgb_driver_name[] = "ixgb";
char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
char ixgb_driver_version[] = "1.0.47-k1jg";
char ixgb_copyright[] = "Copyright (c) 2001-2003 Intel Corporation.";
/* ixgb_pci_tbl - PCI Device ID Table
*
* For selecting devices to load on private driver_data field (last one)
* stores an index into ixgb_strings.
* 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, String Index }
*/
static struct pci_device_id ixgb_pci_tbl[] = {
/* Intel(R) PRO/10GbE Network Connection */
{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
INTEL_SUBVENDOR_ID, IXGB_SUBDEVICE_ID_A11F, 0, 0, 0},
{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
INTEL_SUBVENDOR_ID, IXGB_SUBDEVICE_ID_A01F, 0, 0, 0},
/* Generic */
{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
/* required last entry */
{0,}
};
MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
static char *ixgb_strings[] = {
"Intel(R) PRO/10GbE Network Connection"
};
/* Local Function Prototypes */
int ixgb_up(struct ixgb_adapter *adapter);
void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog);
void ixgb_reset(struct ixgb_adapter *adapter);
static int ixgb_init_module(void);
static void ixgb_exit_module(void);
static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static void ixgb_remove(struct pci_dev *pdev);
static void ixgb_sw_init(struct ixgb_adapter *adapter);
static int ixgb_open(struct net_device *netdev);
static int ixgb_close(struct net_device *netdev);
static int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
static int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
static void ixgb_configure_tx(struct ixgb_adapter *adapter);
static void ixgb_configure_rx(struct ixgb_adapter *adapter);
static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
static void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
static void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
static void ixgb_set_multi(struct net_device *netdev);
static void ixgb_watchdog(unsigned long data);
static inline boolean_t ixgb_tso(struct ixgb_adapter *adapter,
struct sk_buff *skb);
static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
static void ixgb_tx_timeout(struct net_device *netdev);
static void ixgb_tx_timeout_task(struct net_device *netdev);
static void ixgb_vlan_rx_register(struct net_device *netdev,
struct vlan_group *grp);
static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
static int ixgb_set_mac(struct net_device *netdev, void *p);
static void ixgb_update_stats(struct ixgb_adapter *adapter);
static inline void ixgb_irq_disable(struct ixgb_adapter *adapter);
static inline void ixgb_irq_enable(struct ixgb_adapter *adapter);
static irqreturn_t ixgb_intr(int irq, void *data, struct pt_regs *regs);
static void ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
#ifdef CONFIG_IXGB_NAPI
static int ixgb_poll(struct net_device *netdev, int *budget);
#else
static void ixgb_clean_rx_irq(struct ixgb_adapter *adapter);
#endif
static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter);
static int ixgb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
static inline void ixgb_rx_checksum(struct ixgb_adapter *adapter,
struct ixgb_rx_desc *rx_desc,
struct sk_buff *skb);
static int ixgb_notify_reboot(struct notifier_block *, unsigned long event,
void *ptr);
static int ixgb_suspend(struct pci_dev *pdev, u32 state);
struct notifier_block ixgb_notifier_reboot = {
.notifier_call = ixgb_notify_reboot,
.next = NULL,
.priority = 0
};
/* Exported from other modules */
extern void ixgb_check_options(struct ixgb_adapter *adapter);
extern int ixgb_ethtool_ioctl(struct net_device *netdev, struct ifreq *ifr);
static struct pci_driver ixgb_driver = {
.name = ixgb_driver_name,
.id_table = ixgb_pci_tbl,
.probe = ixgb_probe,
.remove = __devexit_p(ixgb_remove),
/* Power Managment Hooks */
.suspend = NULL,
.resume = NULL
};
MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
MODULE_LICENSE("GPL");
/* some defines for controlling descriptor fetches in h/w */
#define RXDCTL_PTHRESH_DEFAULT 128 /* chip considers prefech below this */
#define RXDCTL_HTHRESH_DEFAULT 16 /* chip will only prefetch if tail is
pushed this many descriptors from head */
#define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */
/**
* ixgb_init_module - Driver Registration Routine.
*
* ixgb_init_module is the first routine called when the driver is
* loaded. All it does is register with the PCI subsystem.
**/
static int __init
ixgb_init_module(void)
{
int ret;
IXGB_DBG("ixgb_init_module\n");
printk(KERN_INFO "%s - version %s\n", ixgb_driver_string,
ixgb_driver_version);
printk(KERN_INFO "%s\n", ixgb_copyright);
#ifdef CONFIG_IXGB_NAPI
printk(KERN_INFO "NAPI Enabled\n");
#endif
ret = pci_module_init(&ixgb_driver);
if (ret >= 0) {
register_reboot_notifier(&ixgb_notifier_reboot);
}
return ret;
}
module_init(ixgb_init_module);
/**
* ixgb_exit_module - Driver Exit Cleanup Routine.
*
* ixgb_exit_module is called just before the driver is removed
* from memory.
**/
static void __exit
ixgb_exit_module(void)
{
IXGB_DBG("ixgb_exit_module\n");
unregister_reboot_notifier(&ixgb_notifier_reboot);
pci_unregister_driver(&ixgb_driver);
}
module_exit(ixgb_exit_module);
/**
* ixgb_up - Driver ifconfig UP routine.
*
* ixgb_up is called to initialize and bring online an interface.
* @param adapter board private structure
**/
int
ixgb_up(struct ixgb_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
IXGB_DBG("ixgb_up\n");
if (request_irq(netdev->irq, &ixgb_intr, SA_SHIRQ | SA_SAMPLE_RANDOM,
netdev->name, netdev)) {
IXGB_DBG("%s: request_irq failed\n", netdev->name);
return -1;
}
/* disable interrupts and get the hardware into a known state */
IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
/* hardware was reset in probe/down, we need to reload some things */
ixgb_set_multi(netdev);
ixgb_restore_vlan(adapter);
ixgb_configure_tx(adapter);
ixgb_setup_rctl(adapter);
ixgb_configure_rx(adapter);
ixgb_alloc_rx_buffers(adapter);
mod_timer(&adapter->watchdog_timer, jiffies);
ixgb_irq_enable(adapter);
IXGB_DBG("ixgb_up: RAH_0 is <%x>\n", IXGB_READ_REG(&adapter->hw, RAH));
IXGB_DBG("ixgb_up: RDBAL is <%x>\n",
IXGB_READ_REG(&adapter->hw, RDBAL));
return 0;
}
/**
* ixgb_down - Driver ifconfig DOWN routine.
*
* ixgb_down is called to uninitialize and take offline an interface.
* @param adapter board private structure
* @param kill_watchdog
**/
void
ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog)
{
struct net_device *netdev = adapter->netdev;
IXGB_DBG("ixgb_down\n");
ixgb_irq_disable(adapter);
free_irq(netdev->irq, netdev);
if (kill_watchdog)
del_timer_sync(&adapter->watchdog_timer);
adapter->link_speed = 0;
adapter->link_duplex = 0;
netif_carrier_off(netdev);
netif_stop_queue(netdev);
ixgb_reset(adapter);
ixgb_clean_tx_ring(adapter);
ixgb_clean_rx_ring(adapter);
}
/**
* ixgb_reset - hardware reset.
*
* ixgb_reset is called to initialize hardware to a known state.
* @param adapter board private structure
**/
void
ixgb_reset(struct ixgb_adapter *adapter)
{
IXGB_DBG("ixgb_reset\n");
ixgb_adapter_stop(&adapter->hw);
if (!ixgb_init_hw(&adapter->hw))
IXGB_DBG("ixgb_init_hw failed.\n");
}
/**
* ixgb_probe - Device Initialization Routine.
* @param pdev PCI device information struct
* @param ent entry in ixgb_pci_table
*
* Returns 0 on success, negative on failure
**/
static int __devinit
ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct net_device *netdev = NULL;
struct ixgb_adapter *adapter;
static int cards_found = 0;
unsigned long mmio_start;
int mmio_len;
int pci_using_dac;
int i;
IXGB_DBG("ixgb_probe\n");
if ((i = pci_enable_device(pdev))) {
IXGB_ERR("pci_enable_device failed\n");
return i;
}
if (!(i = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
pci_using_dac = 1;
} else {
if ((i = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
IXGB_ERR("No usable DMA configuration, aborting\n");
return i;
}
pci_using_dac = 0;
}
if ((i = pci_request_regions(pdev, ixgb_driver_name))) {
IXGB_ERR("Failed to reserve PCI I/O and Memory resources.\n");
return i;
}
pci_set_master(pdev);
/* alloc_etherdev clears the memory for us */
netdev = alloc_etherdev(sizeof (struct ixgb_adapter));
if (!netdev) {
IXGB_ERR("Unable to allocate net_device struct\n");
goto err_alloc_etherdev;
}
SET_MODULE_OWNER(netdev);
SET_NETDEV_DEV(netdev, &pdev->dev);
pci_set_drvdata(pdev, netdev);
adapter = netdev->priv;
adapter->netdev = netdev;
adapter->pdev = pdev;
adapter->hw.back = adapter;
mmio_start = pci_resource_start(pdev, BAR_0);
mmio_len = pci_resource_len(pdev, BAR_0);
adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
if (!adapter->hw.hw_addr)
goto err_ioremap;
for (i = BAR_1; i <= BAR_5; i++) {
if (pci_resource_len(pdev, i) == 0)
continue;
if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
adapter->hw.io_base = pci_resource_start(pdev, i);
break;
}
}
IXGB_DBG("mmio_start<%lx> hw_addr<%p>\n", mmio_start,
adapter->hw.hw_addr);
netdev->open = &ixgb_open;
netdev->stop = &ixgb_close;
netdev->hard_start_xmit = &ixgb_xmit_frame;
netdev->get_stats = &ixgb_get_stats;
netdev->set_multicast_list = &ixgb_set_multi;
netdev->set_mac_address = &ixgb_set_mac;
netdev->change_mtu = &ixgb_change_mtu;
netdev->do_ioctl = &ixgb_ioctl;
netdev->tx_timeout = &ixgb_tx_timeout;
netdev->watchdog_timeo = HZ;
#ifdef CONFIG_IXGB_NAPI
netdev->poll = &ixgb_poll;
netdev->weight = 64;
#endif
netdev->vlan_rx_register = ixgb_vlan_rx_register;
netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
netdev->irq = pdev->irq;
netdev->mem_start = mmio_start;
netdev->mem_end = mmio_start + mmio_len;
netdev->base_addr = adapter->hw.io_base;
adapter->bd_number = cards_found;
adapter->id_string = ixgb_strings[ent->driver_data];
adapter->link_speed = 0;
adapter->link_duplex = 0;
/* setup the private structure */
ixgb_sw_init(adapter);
netdev->features = NETIF_F_SG |
NETIF_F_HW_CSUM |
NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER;
#ifdef NETIF_F_TSO
netdev->features |= NETIF_F_TSO;
#endif
if (pci_using_dac)
netdev->features |= NETIF_F_HIGHDMA;
/* make sure the EEPROM is good */
if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
IXGB_DBG("Invalid EEPROM checksum.\n");
goto err_eeprom;
}
ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
if (!is_valid_ether_addr(netdev->dev_addr)) {
IXGB_DBG("Invalid MAC address in EEPROM.\n");
goto err_eeprom;
}
adapter->max_data_per_txd = IXGB_MAX_JUMBO_FRAME_SIZE;
adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
init_timer(&adapter->watchdog_timer);
adapter->watchdog_timer.function = &ixgb_watchdog;
adapter->watchdog_timer.data = (unsigned long) adapter;
INIT_WORK(&adapter->tx_timeout_task,
(void (*)(void *)) ixgb_tx_timeout_task, netdev);
register_netdev(netdev);
memcpy(adapter->ifname, netdev->name, IFNAMSIZ);
adapter->ifname[IFNAMSIZ - 1] = 0;
/* we're going to reset, so assume we have no link for now */
netif_carrier_off(netdev);
netif_stop_queue(netdev);
printk(KERN_INFO "%s: %s\n", netdev->name, adapter->id_string);
ixgb_check_options(adapter);
/* reset the hardware with the new settings */
ixgb_reset(adapter);
cards_found++;
return 0;
err_eeprom:
iounmap(adapter->hw.hw_addr);
err_ioremap:
pci_release_regions(pdev);
free_netdev(netdev);
err_alloc_etherdev:
return -ENOMEM;
}
/**
* ixgb_remove - Device Removal Routine.
* @param pdev PCI device information struct
*
* ixgb_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
ixgb_remove(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct ixgb_adapter *adapter = netdev->priv;
IXGB_DBG("ixgb_remove\n");
unregister_netdev(netdev);
#ifdef ETHTOOL_IDENTIFY
ixgb_identify_stop(adapter);
#endif
iounmap((void *) adapter->hw.hw_addr);
pci_release_regions(pdev);
free_netdev(netdev);
}
/**
* ixgb_sw_init - Initialize general software structures (struct ixgb_adapter).
* @param adapter board private structure to initialize
*
* ixgb_sw_init initializes the adapter private data structure.
* Fields are initialized based on PCI device information and
* OS network device settings (MTU size).
**/
static void __devinit
ixgb_sw_init(struct ixgb_adapter *adapter)
{
struct ixgb_hw *hw = &adapter->hw;
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
IXGB_DBG("ixgb_sw_init\n");
/* PCI config space info */
/* FIXME: do not store, instead directly use struct pci_dev
* where needed
*/
hw->vendor_id = pdev->vendor;
hw->device_id = pdev->device;
hw->subsystem_vendor_id = pdev->subsystem_vendor;
hw->subsystem_id = pdev->subsystem_device;
adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
if (hw->device_id == IXGB_DEVICE_ID_82597EX)
hw->mac_type = ixgb_82597;
else {
/* should never have loaded on this device */
printk(KERN_ERR "ixgb: unsupported device id\n");
}
/* enable flow control to be programmed */
hw->fc.send_xon = 1;
atomic_set(&adapter->irq_sem, 1);
}
/**
* ixgb_open - Called when a network interface is made active.
* @param 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
ixgb_open(struct net_device *netdev)
{
struct ixgb_adapter *adapter = netdev->priv;
IXGB_DBG("ixgb_open\n");
/* allocate transmit descriptors */
if (ixgb_setup_tx_resources(adapter)) {
IXGB_DBG("ixgb_open: failed ixgb_setup_tx_resources.\n");
goto err_setup_tx;
}
/* allocate receive descriptors and buffers */
if (ixgb_setup_rx_resources(adapter)) {
IXGB_DBG("ixgb_open: failed ixgb_setup_rx_resources.\n");
goto err_setup_rx;
}
if (ixgb_up(adapter))
goto err_up;
return 0;
err_up:
ixgb_free_rx_resources(adapter);
err_setup_rx:
ixgb_free_tx_resources(adapter);
err_setup_tx:
ixgb_reset(adapter);
return -EBUSY;
}
/**
* ixgb_close - Disables a network interface.
* @param 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
ixgb_close(struct net_device *netdev)
{
struct ixgb_adapter *adapter = netdev->priv;
IXGB_DBG("ixgb_close\n");
ixgb_down(adapter, TRUE);
ixgb_free_tx_resources(adapter);
ixgb_free_rx_resources(adapter);
return 0;
}
/**
* ixgb_setup_tx_resources - allocate Tx resources (Descriptors).
* @param adapter board private structure
*
* Return 0 on success, negative on failure
**/
static int
ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
struct ixgb_desc_ring *txdr = &adapter->tx_ring;
int size;
IXGB_DBG("ixgb_setup_tx_resources\n");
size = sizeof (struct ixgb_buffer) * txdr->count;
txdr->buffer_info = kmalloc(size, GFP_KERNEL);
if (!txdr->buffer_info) {
return -ENOMEM;
}
memset(txdr->buffer_info, 0, size);
/* round up to nearest 4K */
txdr->size = txdr->count * sizeof (struct ixgb_tx_desc);
IXGB_ROUNDUP(txdr->size, 4096);
txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
if (!txdr->desc) {
kfree(txdr->buffer_info);
return -ENOMEM;
}
memset(txdr->desc, 0, txdr->size);
IXGB_DBG("txdr->desc <%p>\n", txdr->desc);
IXGB_DBG("txdr->next_to_use = <%p>\n", &txdr->next_to_use);
IXGB_DBG("txdr->next_to_clean = <%p>\n", &txdr->next_to_clean);
txdr->next_to_use = 0;
txdr->next_to_clean = 0;
return 0;
}
/**
* ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
* @adapter board private structure
*
* Configure the Tx unit of the MAC after a reset.
**/
static void
ixgb_configure_tx(struct ixgb_adapter *adapter)
{
u32 tctl;
u32 tdlen = adapter->tx_ring.count * sizeof (struct ixgb_tx_desc);
uint64_t tdba = adapter->tx_ring.dma;
struct ixgb_hw *hw = &adapter->hw;
IXGB_DBG("ixgb_configure_tx\n");
/* Setup the Base and Length of the Tx Descriptor Ring
* tx_ring.dma can be either a 32 or 64 bit value
*/
IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
IXGB_WRITE_REG(hw, TDLEN, tdlen);
/* Setup the HW Tx Head and Tail descriptor pointers */
IXGB_WRITE_REG(hw, TDH, 0);
IXGB_WRITE_REG(hw, TDT, 0);
/* don't set up txdctl, it induces performance problems if
* configured incorrectly
txdctl = TXDCTL_PTHRESH_DEFAULT; // prefetch txds below this threshold
txdctl |= (TXDCTL_HTHRESH_DEFAULT // only prefetch if there are this many ready
<< IXGB_TXDCTL_HTHRESH_SHIFT);
IXGB_WRITE_REG (hw, TXDCTL, txdctl);
*/
/* Set the Tx Interrupt Delay register */
IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
/* Program the Transmit Control Register */
tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
IXGB_WRITE_REG(hw, TCTL, tctl);
/* Setup Transmit Descriptor Settings for this adapter */
adapter->tx_cmd_type =
IXGB_TX_DESC_TYPE | IXGB_TX_DESC_CMD_RS
| (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
}
/**
* ixgb_setup_rx_resources - allocate Rx resources (Descriptors).
* @param adapter board private structure
*
* Returns 0 on success, negative on failure
**/
static int
ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
int size;
IXGB_DBG("ixgb_setup_rx_resources.\n");
size = sizeof (struct ixgb_buffer) * rxdr->count;
rxdr->buffer_info = kmalloc(size, GFP_KERNEL);
if (!rxdr->buffer_info) {
return -ENOMEM;
}
memset(rxdr->buffer_info, 0, size);
/* Round up to nearest 4K */
rxdr->size = rxdr->count * sizeof (struct ixgb_rx_desc);
IXGB_ROUNDUP(rxdr->size, 4096);
rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
if (!rxdr->desc) {
IXGB_DBG("pci_alloc_consistent failed.\n");
kfree(rxdr->buffer_info);
return -ENOMEM;
}
memset(rxdr->desc, 0, rxdr->size);
IXGB_DBG("rxdr->desc <%p>\n", rxdr->desc);
IXGB_DBG("rxdr->next_to_use = <%p>\n", &rxdr->next_to_use);
IXGB_DBG("rxdr->next_to_clean = <%p>\n", &rxdr->next_to_clean);
rxdr->next_to_use = 0;
rxdr->next_to_clean = 0;
return 0;
}
/**
* ixgb_setup_rctl - configure the receive control register.
* @param adapter Board private structure
**/
static void
ixgb_setup_rctl(struct ixgb_adapter *adapter)
{
u32 rctl;
rctl = IXGB_READ_REG(&adapter->hw, RCTL);
IXGB_DBG("ixgb_setup_rctl\n");
rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
rctl |=
IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
(adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
rctl |= IXGB_RCTL_SECRC;
switch (adapter->rx_buffer_len) {
case IXGB_RXBUFFER_2048:
default:
rctl |= IXGB_RCTL_BSIZE_2048;
break;
case IXGB_RXBUFFER_4096:
rctl |= IXGB_RCTL_BSIZE_4096;
break;
case IXGB_RXBUFFER_8192:
rctl |= IXGB_RCTL_BSIZE_8192;
break;
case IXGB_RXBUFFER_16384:
rctl |= IXGB_RCTL_BSIZE_16384;
break;
}
IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
}
/**
* ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
* @param adapter board private structure
*
* Configure the Rx unit of the MAC after a reset.
**/
static void
ixgb_configure_rx(struct ixgb_adapter *adapter)
{
uint64_t rdba = adapter->rx_ring.dma;
u32 rdlen = adapter->rx_ring.count * sizeof (struct ixgb_rx_desc);
struct ixgb_hw *hw = &adapter->hw;
u32 rctl;
u32 rxcsum;
IXGB_DBG("ixgb_configure_rx\n");
/* make sure receives are disabled while setting up the descriptors */
rctl = IXGB_READ_REG(hw, RCTL);
IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
/* set the Receive Delay Timer Register */
IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
/* Setup the Base and Length of the Rx Descriptor Ring */
IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
IXGB_WRITE_REG(hw, RDLEN, rdlen);
/* Setup the HW Rx Head and Tail Descriptor Pointers */
IXGB_WRITE_REG(hw, RDH, 0);
IXGB_WRITE_REG(hw, RDT, 0);
{
u32 rxdctl;
/* burst 16 or burst when RXT0 */
rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT
| RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT
| RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
}
if (adapter->raidc) {
u32 raidc;
u8 poll_threshold;
/* Poll every rx_int_delay period, if RBD exists
* Receive Backlog Detection is set to <threshold>
* Rx Descriptors
* max is 0x3F == set to poll when 504 RxDesc left
* min is 0 */
/* polling times are 1 == 0.8192us
2 == 1.6384us
3 == 3.2768us etc
...
511 == 418 us
*/
#define IXGB_RAIDC_POLL_DEFAULT 122 /* set to poll every ~100 us under load
also known as 10000 interrupts / sec */
/* divide this by 2^3 (8) to get a register size count */
poll_threshold = ((adapter->rx_ring.count - 1) >> 3);
/* poll at half of that size */
poll_threshold >>= 1;
/* make sure its not bigger than our max */
poll_threshold &= 0x3F;
raidc = IXGB_RAIDC_EN | /* turn on raidc style moderation */
IXGB_RAIDC_RXT_GATE | /* don't interrupt with rxt0 while
in RBD mode (polling) */
(IXGB_RAIDC_POLL_DEFAULT << IXGB_RAIDC_POLL_SHIFT) |
/* this sets the regular "min interrupt delay" */
(adapter->rx_int_delay << IXGB_RAIDC_DELAY_SHIFT) |
poll_threshold;
IXGB_WRITE_REG(hw, RAIDC, raidc);
}
/* Enable Receive Checksum Offload for TCP and UDP */
if (adapter->rx_csum == TRUE) {
rxcsum = IXGB_READ_REG(hw, RXCSUM);
rxcsum |= IXGB_RXCSUM_TUOFL;
IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
}
/* Enable Receives */
IXGB_WRITE_REG(hw, RCTL, rctl);
}
/**
* ixgb_free_tx_resources - Free Tx Resources.
* @param adapter board private structure
*
* Free all transmit software resources
**/
static void
ixgb_free_tx_resources(struct ixgb_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
IXGB_DBG("ixgb_free_tx_resources\n");
ixgb_clean_tx_ring(adapter);
kfree(adapter->tx_ring.buffer_info);
adapter->tx_ring.buffer_info = NULL;
pci_free_consistent(pdev, adapter->tx_ring.size, adapter->tx_ring.desc,
adapter->tx_ring.dma);
adapter->tx_ring.desc = NULL;
}
/**
* ixgb_clean_tx_ring - Free Tx Buffers.
* @param adapter board private structure
**/
static void
ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
unsigned long size;
int i;
IXGB_DBG("ixgb_clean_tx_ring\n");
/* Free all the Tx ring sk_buffs */
for (i = 0; i < adapter->tx_ring.count; i++) {
if (adapter->tx_ring.buffer_info[i].skb) {
pci_unmap_page(pdev,
adapter->tx_ring.buffer_info[i].dma,
adapter->tx_ring.buffer_info[i].length,
PCI_DMA_TODEVICE);
dev_kfree_skb(adapter->tx_ring.buffer_info[i].skb);
adapter->tx_ring.buffer_info[i].skb = NULL;
}
}
size = sizeof (struct ixgb_buffer) * adapter->tx_ring.count;
memset(adapter->tx_ring.buffer_info, 0, size);
/* Zero out the descriptor ring */
memset(adapter->tx_ring.desc, 0, adapter->tx_ring.size);
adapter->tx_ring.next_to_use = 0;
adapter->tx_ring.next_to_clean = 0;
IXGB_WRITE_REG(&adapter->hw, TDH, 0);
IXGB_WRITE_REG(&adapter->hw, TDT, 0);
}
/**
* ixgb_free_rx_resources - Free Rx Resources.
* @param adapter board private structure
*
* Free all receive software resources
**/
static void
ixgb_free_rx_resources(struct ixgb_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
IXGB_DBG("ixgb_free_rx_resources\n");
ixgb_clean_rx_ring(adapter);
kfree(adapter->rx_ring.buffer_info);
adapter->rx_ring.buffer_info = NULL;
pci_free_consistent(pdev, adapter->rx_ring.size,
adapter->rx_ring.desc, adapter->rx_ring.dma);
adapter->rx_ring.desc = NULL;
}
/**
* ixgb_clean_rx_ring - Free Rx Buffers.
* @param adapter board private structure
**/
static void
ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
unsigned long size;
int i;
IXGB_DBG("ixgb_free_rx_ring\n");
/* Free all the Rx ring sk_buffs */
for (i = 0; i < adapter->rx_ring.count; i++) {
if (adapter->rx_ring.buffer_info[i].skb) {
pci_unmap_single(pdev,
adapter->rx_ring.buffer_info[i].dma,
adapter->rx_ring.buffer_info[i].length,
PCI_DMA_FROMDEVICE);
dev_kfree_skb(adapter->rx_ring.buffer_info[i].skb);
adapter->rx_ring.buffer_info[i].skb = NULL;
}
}
size = sizeof (struct ixgb_buffer) * adapter->rx_ring.count;
memset(adapter->rx_ring.buffer_info, 0, size);
/* Zero out the descriptor ring */
memset(adapter->rx_ring.desc, 0, adapter->rx_ring.size);
adapter->rx_ring.next_to_clean = 0;
adapter->rx_ring.next_to_use = 0;
IXGB_WRITE_REG(&adapter->hw, RDH, 0);
IXGB_WRITE_REG(&adapter->hw, RDT, 0);
}
/**
* ixgb_set_multi - Multicast and Promiscuous mode set.
* @param 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
* resposible for configuring the hardware for proper multicast,
* promiscuous mode, and all-multi behavior.
**/
void
ixgb_set_multi(struct net_device *netdev)
{
struct ixgb_adapter *adapter = netdev->priv;
struct ixgb_hw *hw = &adapter->hw;
u32 rctl;
int i;
struct dev_mc_list *mc_ptr;
IXGB_DBG("ixgb_set_multi <%x>\n", netdev->flags);
/* Check for Promiscuous and All Multicast modes */
rctl = IXGB_READ_REG(&adapter->hw, RCTL);
if (netdev->flags & IFF_PROMISC) {
rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
} else if (netdev->flags & IFF_ALLMULTI) {
rctl |= IXGB_RCTL_MPE;
rctl &= ~IXGB_RCTL_UPE;
} else {
rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
}
if (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
rctl |= IXGB_RCTL_MPE;
IXGB_WRITE_REG(hw, RCTL, rctl);
} else {
u8 mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS];
IXGB_WRITE_REG(hw, RCTL, rctl);
for (i = 0, mc_ptr = netdev->mc_list; mc_ptr;
i++, mc_ptr = mc_ptr->next)
memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
}
}
/**
* ixgb_watchdog - Timer Call-back.
* @param data pointer to adapter cast into an unsigned long
**/
void
ixgb_watchdog(unsigned long data)
{
struct ixgb_adapter *adapter = (struct ixgb_adapter *) data;
struct net_device *netdev = adapter->netdev;
ixgb_check_for_link(&adapter->hw);
if (ixgb_check_for_bad_link(&adapter->hw)) {
/* force the reset path */
netif_stop_queue(netdev);
}
if (adapter->hw.link_up) {
if (!netif_carrier_ok(netdev)) {
printk(KERN_INFO "ixgb: %s NIC Link is Up %d Mbps %s\n",
netdev->name, 10000, "Full Duplex");
adapter->link_speed = 10000;
adapter->link_duplex = FULL_DUPLEX;
netif_carrier_on(netdev);
netif_wake_queue(netdev);
}
} else {
if (netif_carrier_ok(netdev)) {
printk(KERN_INFO "ixgb: %s NIC Link is Down\n",
netdev->name);
adapter->link_speed = 0;
adapter->link_duplex = 0;
netif_carrier_off(netdev);
netif_stop_queue(netdev);
ixgb_down(adapter, FALSE);
ixgb_up(adapter);
}
}
ixgb_update_stats(adapter);
/* Early detection of hung controller */
{
struct ixgb_desc_ring *txdr = &adapter->tx_ring;
int i = txdr->next_to_clean;
if (txdr->buffer_info[i].dma &&
time_after(jiffies, txdr->buffer_info[i].time_stamp + HZ) &&
!(IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_TXOFF))
{
IXGB_DBG
("ixgb: %s Hung controller? Watchdog stopping queue\n",
netdev->name);
netif_stop_queue(netdev);
}
}
/* generate an interrupt to force clean up of any stragglers */
IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
/* Reset the timer */
mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
}
#define IXGB_TX_FLAGS_CSUM 0x00000001
#define IXGB_TX_FLAGS_VLAN 0x00000002
#define IXGB_TX_FLAGS_TSO 0x00000004
/** Transmit Segmentation offload setup.
* ixgb_tso - (Large Send) setup where the initial descriptor is prepared
* @param adapter adapter specific information
* @param skb the skb we are trying to set up for segmentation
**/
static inline boolean_t
ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
{
#ifdef NETIF_F_TSO
struct ixgb_context_desc *context_desc;
int i;
u8 ipcss, ipcso, tucss, tucso, hdr_len;
u16 ipcse, tucse, mss;
if (likely(skb_shinfo(skb)->tso_size)) {
hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
mss = skb_shinfo(skb)->tso_size;
skb->nh.iph->tot_len = 0;
skb->nh.iph->check = 0;
skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr,
skb->nh.iph->daddr,
0, IPPROTO_TCP, 0);
ipcss = skb->nh.raw - skb->data;
ipcso = (void *) &(skb->nh.iph->check) - (void *) skb->data;
ipcse = skb->h.raw - skb->data - 1;
tucss = skb->h.raw - skb->data;
tucso = (void *) &(skb->h.th->check) - (void *) skb->data;
tucse = 0;
i = adapter->tx_ring.next_to_use;
context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
context_desc->ipcss = ipcss;
context_desc->ipcso = ipcso;
context_desc->ipcse = cpu_to_le16(ipcse);
context_desc->tucss = tucss;
context_desc->tucso = tucso;
context_desc->tucse = cpu_to_le16(tucse);
context_desc->mss = cpu_to_le16(mss);
context_desc->hdr_len = hdr_len;
context_desc->status = 0;
context_desc->cmd_type_len = cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
|
IXGB_CONTEXT_DESC_CMD_TSE
|
IXGB_CONTEXT_DESC_CMD_IP
|
IXGB_CONTEXT_DESC_CMD_TCP
|
IXGB_CONTEXT_DESC_CMD_RS
|
IXGB_CONTEXT_DESC_CMD_IDE
| (skb->len -
(hdr_len)));
i = (i + 1) % adapter->tx_ring.count;
adapter->tx_ring.next_to_use = i;
return TRUE;
}
#endif
return FALSE;
}
/**
* ixgb_tx_csum - prepare context descriptor for checksum offload.
*
* ixgb_tx_csum is called to prepare for checksumming a packet in hw.
* @param adapter board private structure
* @param skb structure containing data to send
**/
static inline boolean_t
ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
{
struct ixgb_context_desc *context_desc;
int i;
u8 css, cso;
if (likely(skb->ip_summed == CHECKSUM_HW)) {
css = skb->h.raw - skb->data;
cso = (skb->h.raw + skb->csum) - skb->data;
i = adapter->tx_ring.next_to_use;
context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
context_desc->tucss = css;
context_desc->tucso = cso;
context_desc->tucse = 0;
/* zero out any previously existing data in one instruction */
*(u32 *) & (context_desc->ipcss) = 0;
context_desc->status = 0;
context_desc->hdr_len = 0;
context_desc->mss = 0;
context_desc->cmd_type_len =
cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
| IXGB_TX_DESC_CMD_RS | IXGB_TX_DESC_CMD_IDE);
i = (i + 1) % adapter->tx_ring.count;
adapter->tx_ring.next_to_use = i;
return TRUE;
}
return FALSE;
}
/**
* ixgb_tx_map - private function for mapping send data to hardware addresses.
*
* @param adapter board private structure
* @param skb structure containing data to send
**/
static inline int
ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb)
{
struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
int len, offset, count, size, i;
int f;
len = skb->len - skb->data_len;
i = (tx_ring->next_to_use + tx_ring->count - 1) % tx_ring->count;
count = 0;
offset = 0;
while (len) {
i = (i + 1) % tx_ring->count;
size = min(len, adapter->max_data_per_txd);
tx_ring->buffer_info[i].length = size;
tx_ring->buffer_info[i].dma =
pci_map_single(adapter->pdev, skb->data + offset, size,
PCI_DMA_TODEVICE);
tx_ring->buffer_info[i].time_stamp = jiffies;
len -= size;
offset += size;
count++;
}
for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
struct skb_frag_struct *frag;
frag = &skb_shinfo(skb)->frags[f];
len = frag->size;
offset = 0;
while (len) {
i = (i + 1) % tx_ring->count;
size = min(len, adapter->max_data_per_txd);
tx_ring->buffer_info[i].length = size;
tx_ring->buffer_info[i].dma =
pci_map_page(adapter->pdev, frag->page,
frag->page_offset + offset, size,
PCI_DMA_TODEVICE);
tx_ring->buffer_info[i].time_stamp = jiffies;
len -= size;
offset += size;
count++;
}
}
tx_ring->buffer_info[i].skb = skb;
return count;
}
/**
* ixgb_tx_queue - private function to start transmit on hardware.
*
* @param adapter board private structure
* @param count number of tx_descriptors to initialize (consume)
* @param vlan_id the vlan tag to insert (if necessary)
* @param tx_flags special handling for this transmit, if any
**/
static inline void
ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,
int tx_flags)
{
struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
struct ixgb_tx_desc *tx_desc = NULL;
u32 cmd_type_len = adapter->tx_cmd_type;
u8 status = 0;
u8 popts = 0;
int i;
if (tx_flags & IXGB_TX_FLAGS_TSO) {
cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
}
if (tx_flags & IXGB_TX_FLAGS_CSUM)
popts |= IXGB_TX_DESC_POPTS_TXSM;
if (tx_flags & IXGB_TX_FLAGS_VLAN) {
cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
}
i = tx_ring->next_to_use;
while (count--) {
tx_desc = IXGB_TX_DESC(*tx_ring, i);
tx_desc->buff_addr = cpu_to_le64(tx_ring->buffer_info[i].dma);
tx_desc->cmd_type_len =
cpu_to_le32(cmd_type_len | tx_ring->buffer_info[i].length);
tx_desc->status = status;
tx_desc->popts = popts;
tx_desc->vlan = cpu_to_le16(vlan_id);
i = (i + 1) % tx_ring->count;
}
tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP);
/* 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();
tx_ring->next_to_use = i;
IXGB_WRITE_REG(&adapter->hw, TDT, i);
}
#define TXD_USE_COUNT(S, X) (((S) / (X)) + (((S) % (X)) ? 1 : 0))
/**
* ixgb_xmit_frame - hard_start_xmit linked function, transmit entry point.
*
* ixgb_xmit_frame is called to send an skb on the wire.
* @param skb contains data to send
* @param netdev network interface device structure
**/
static int
ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
struct ixgb_adapter *adapter = netdev->priv;
int vlan_id = 0;
int tx_flags = 0, count;
int f;
count =
TXD_USE_COUNT(skb->len - skb->data_len, adapter->max_data_per_txd);
if (count == 0) {
dev_kfree_skb_any(skb);
return 0;
}
for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
adapter->max_data_per_txd);
#ifdef NETIF_F_TSO
if ((skb_shinfo(skb)->tso_size) || (skb->ip_summed == CHECKSUM_HW))
count++;
#else
if (skb->ip_summed == CHECKSUM_HW)
count++;
#endif
if (unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < count)) {
netif_stop_queue(netdev);
return 1;
}
if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
tx_flags |= IXGB_TX_FLAGS_VLAN;
vlan_id = vlan_tx_tag_get(skb);
}
if (ixgb_tso(adapter, skb))
tx_flags |= IXGB_TX_FLAGS_TSO;
else if (ixgb_tx_csum(adapter, skb))
tx_flags |= IXGB_TX_FLAGS_CSUM;
count = ixgb_tx_map(adapter, skb);
ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
netdev->trans_start = jiffies;
return 0;
}
/**
* ixgb_tx_timeout - Respond to a Tx Hang by resetting the adapter.
* @param netdev network interface device structure
**/
static void
ixgb_tx_timeout(struct net_device *netdev)
{
struct ixgb_adapter *adapter = netdev->priv;
IXGB_DBG("ixgb_tx_timeout\n");
/* Do the reset outside of interrupt context */
schedule_work(&adapter->tx_timeout_task);
}
/**
* ixgb_tx_timeout_task - worker function to reset hardware and dump queues.
* This function is pointed to by adapter->tx_timeout_task
*
* @param netdev network interface device structure
**/
static void
ixgb_tx_timeout_task(struct net_device *netdev)
{
struct ixgb_adapter *adapter = netdev->priv;
IXGB_DBG("ixgb_tx_timeout_task\n");
netif_device_detach(netdev);
ixgb_down(adapter, TRUE);
ixgb_up(adapter);
netif_device_attach(netdev);
}
/**
* ixgb_get_stats - Get System Network Statistics.
* @param 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 *
ixgb_get_stats(struct net_device *netdev)
{
struct ixgb_adapter *adapter = netdev->priv;
return &adapter->net_stats;
}
/**
* ixgb_change_mtu - Change the Maximum Transfer Unit.
* @param netdev network interface device structure
* @param new_mtu new value for maximum frame size
*
* Returns 0 on success, negative on failure
**/
static int
ixgb_change_mtu(struct net_device *netdev, int new_mtu)
{
struct ixgb_adapter *adapter = netdev->priv;
u32 old_mtu = adapter->rx_buffer_len;
int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
IXGB_DBG("ixgb_change_mtu\n");
if ((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
|| (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
IXGB_ERR("Invalid MTU setting\n");
return -EINVAL;
}
if ((max_frame <=
IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
|| (max_frame <= IXGB_RXBUFFER_2048)) {
adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
} else if (max_frame <= IXGB_RXBUFFER_4096) {
adapter->rx_buffer_len = IXGB_RXBUFFER_4096;
} else if (max_frame <= IXGB_RXBUFFER_8192) {
adapter->rx_buffer_len = IXGB_RXBUFFER_8192;
} else {
adapter->rx_buffer_len = IXGB_RXBUFFER_16384;
}
if (old_mtu != adapter->rx_buffer_len && netif_running(netdev)) {
ixgb_down(adapter, TRUE);
ixgb_up(adapter);
}
if (adapter->hw.max_frame_size != max_frame) {
struct ixgb_hw *hw = &adapter->hw;
adapter->hw.max_frame_size = max_frame;
IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
if (hw->max_frame_size >
IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
if (!(ctrl0 & IXGB_CTRL0_JFE)) {
ctrl0 |= IXGB_CTRL0_JFE;
IXGB_WRITE_REG(hw, CTRL0, ctrl0);
}
}
printk(KERN_ERR "%s: ixgb_change_mtu MFS is set to <%x>\n",
adapter->netdev->name,
(IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT));
}
netdev->mtu = new_mtu;
return 0;
}
/**
* ixgb_set_mac - Change the Ethernet Address of the NIC.
* @param netdev network interface device structure
* @param p pointer to an address structure
*
* Returns 0 on success, negative on failure
**/
static int
ixgb_set_mac(struct net_device *netdev, void *p)
{
struct ixgb_adapter *adapter = netdev->priv;
struct sockaddr *addr = (struct sockaddr *) p;
IXGB_DBG("ixgb_set_mac\n");
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
return 0;
}
/**
* ixgb_update_stats - Update the board statistics counters.
* @param adapter board private structure
**/
static void
ixgb_update_stats(struct ixgb_adapter *adapter)
{
adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
/* Fill out the OS statistics structure */
adapter->net_stats.rx_packets = adapter->stats.gprcl;
adapter->net_stats.tx_packets = adapter->stats.gptcl;
adapter->net_stats.rx_bytes = adapter->stats.gorcl;
adapter->net_stats.tx_bytes = adapter->stats.gotcl;
adapter->net_stats.multicast = adapter->stats.mprcl;
adapter->net_stats.collisions = 0;
/* ignore RLEC as it reports errors for padded (<64bytes) frames
* with a length in the type/len field */
adapter->net_stats.rx_errors =
/* adapter->stats.rnbc + */ adapter->stats.crcerrs +
adapter->stats.ruc +
adapter->stats.roc /*+ adapter->stats.rlec */ +
adapter->stats.icbc +
adapter->stats.ecbc + adapter->stats.mpc;
adapter->net_stats.rx_dropped = adapter->stats.mpc;
/* see above
* adapter->net_stats.rx_length_errors = adapter->stats.rlec;
*/
adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
adapter->net_stats.rx_over_errors = adapter->stats.mpc;
adapter->net_stats.tx_errors = 0;
adapter->net_stats.rx_frame_errors = 0;
adapter->net_stats.tx_aborted_errors = 0;
adapter->net_stats.tx_carrier_errors = 0;
adapter->net_stats.tx_fifo_errors = 0;
adapter->net_stats.tx_heartbeat_errors = 0;
adapter->net_stats.tx_window_errors = 0;
}
/**
* ixgb_irq_disable - Mask off interrupt generation on the NIC
* @param adapter board private structure
**/
static inline void
ixgb_irq_disable(struct ixgb_adapter *adapter)
{
IXGB_DBG("ixgb_irq_disable\n");
atomic_inc(&adapter->irq_sem);
IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
synchronize_irq(adapter->netdev->irq);
}
/**
* ixgb_irq_enable - Enable default interrupt generation settings.
* @param adapter board private structure
**/
static inline void
ixgb_irq_enable(struct ixgb_adapter *adapter)
{
IXGB_DBG("ixgb_irq_enable\n");
if (atomic_dec_and_test(&adapter->irq_sem)) {
IXGB_WRITE_REG(&adapter->hw, IMS,
IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
IXGB_INT_RXO | IXGB_INT_LSC);
}
}
#define IXGB_MAX_INTR 10
/**
* ixgb_intr - Interrupt Handler.
* @param irq interrupt number
* @param data pointer to a network interface device structure
* @param regs CPU registers structure
**/
static irqreturn_t
ixgb_intr(int irq, void *data, struct pt_regs *regs)
{
struct net_device *netdev = (struct net_device *) data;
struct ixgb_adapter *adapter = netdev->priv;
#ifdef CONFIG_IXGB_NAPI
if (netif_rx_schedule_prep(netdev)) {
ixgb_irq_disable(adapter);
__netif_rx_schedule(netdev);
}
return IRQ_HANDLED; /* FIXME: check for shared interrupts */
#else
struct ixgb_hw *hw = &adapter->hw;
u32 icr;
uint i = IXGB_MAX_INTR;
boolean_t rxdmt0 = FALSE;
int handled = 0;
while (i && (icr = IXGB_READ_REG(hw, ICR))) {
handled = 1;
if (icr & IXGB_INT_RXDMT0)
rxdmt0 = TRUE;
if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
mod_timer(&adapter->watchdog_timer, jiffies);
}
/* adapter->generate_int = 0; */
ixgb_clean_rx_irq(adapter);
ixgb_clean_tx_irq(adapter);
i--;
}
/* if RAIDC:EN == 1 and ICR:RXDMT0 == 1, we need to
* set IMS:RXDMT0 to 1 to restart the RBD timer (POLL)
*/
if (rxdmt0 && adapter->raidc) {
/* ready the timer by writing the clear reg */
IXGB_WRITE_REG(hw, IMC, IXGB_INT_RXDMT0);
/* now restart it, h/w will decide if its necessary */
IXGB_WRITE_REG(hw, IMS, IXGB_INT_RXDMT0);
}
return IRQ_RETVAL(handled);
#endif // NAPI else
}
#ifdef CONFIG_IXGB_NAPI
static int
ixgb_process_intr(struct net_device *netdev)
{
struct ixgb_adapter *adapter = netdev->priv;
u32 icr;
int i = IXGB_MAX_INTR;
int hasReceived = 0;
while (i && (icr = IXGB_READ_REG(&adapter->hw, ICR))) {
if (icr & IXGB_INT_RXT0)
hasReceived = 1;
if (!(icr & ~(IXGB_INT_RXT0)))
break;
if (icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)) {
mod_timer(&adapter->watchdog_timer, jiffies);
}
ixgb_clean_tx_irq(adapter);
i--;
}
return hasReceived;
}
#endif
/**
* ixgb_clean_tx_irq - Reclaim resources after transmit completes.
* @param adapter board private structure
**/
static void
ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
{
struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
int i = adapter->tx_ring.next_to_clean;
struct ixgb_tx_desc *tx_desc = IXGB_TX_DESC(*tx_ring, i);
while ((tx_desc->status & IXGB_TX_DESC_STATUS_DD)) {
if (tx_desc->popts
& (IXGB_TX_DESC_POPTS_TXSM | IXGB_TX_DESC_POPTS_IXSM))
adapter->hw_csum_tx_good++;
if (tx_ring->buffer_info[i].dma) {
pci_unmap_page(pdev, tx_ring->buffer_info[i].dma,
tx_ring->buffer_info[i].length,
PCI_DMA_TODEVICE);
tx_ring->buffer_info[i].dma = 0;
}
if (tx_ring->buffer_info[i].skb) {
dev_kfree_skb_any(tx_ring->buffer_info[i].skb);
tx_ring->buffer_info[i].skb = NULL;
}
*(u32 *) & (tx_desc->status) = 0;
i = (i + 1) % tx_ring->count;
tx_desc = IXGB_TX_DESC(*tx_ring, i);
}
tx_ring->next_to_clean = i;
if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
(IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) {
netif_wake_queue(netdev);
}
}
#ifdef CONFIG_IXGB_NAPI
static int
ixgb_poll(struct net_device *netdev, int *budget)
{
struct ixgb_adapter *adapter = netdev->priv;
struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
struct pci_dev *pdev = adapter->pdev;
struct ixgb_rx_desc *rx_desc;
struct sk_buff *skb;
u32 length;
int i;
int received = 0;
int rx_work_limit = *budget;
if (rx_work_limit > netdev->quota)
rx_work_limit = netdev->quota;
ixgb_process_intr(netdev);
i = rx_ring->next_to_clean;
rx_desc = IXGB_RX_DESC(*rx_ring, i);
while ((rx_desc->status & IXGB_RX_DESC_STATUS_DD)) {
if (--rx_work_limit < 0)
goto not_done;
pci_unmap_single(pdev,
rx_ring->buffer_info[i].dma,
rx_ring->buffer_info[i].length,
PCI_DMA_FROMDEVICE);
skb = rx_ring->buffer_info[i].skb;
length = le16_to_cpu(rx_desc->length);
if (!(rx_desc->status & IXGB_RX_DESC_STATUS_EOP)) {
/* All receives must fit into a single buffer */
IXGB_DBG("Receive packet consumed multiple buffers\n");
dev_kfree_skb_irq(skb);
rx_desc->status = 0;
rx_ring->buffer_info[i].skb = NULL;
i = (i + 1) % rx_ring->count;
rx_desc = IXGB_RX_DESC(*rx_ring, i);
continue;
}
if (rx_desc->
errors & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))
{
IXGB_DBG("Receive Errors Reported by Hardware-%x.\n",
rx_desc->errors);
dev_kfree_skb_irq(skb);
rx_desc->status = 0;
rx_ring->buffer_info[i].skb = NULL;
i = (i + 1) % rx_ring->count;
rx_desc = IXGB_RX_DESC(*rx_ring, i);
continue;
}
/* Good Receive */
skb_put(skb, length);
/* Receive Checksum Offload */
ixgb_rx_checksum(adapter, rx_desc, skb);
skb->protocol = eth_type_trans(skb, netdev);
if (adapter->vlgrp
&& (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) {
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
(rx_desc-> special & IXGB_RX_DESC_SPECIAL_VLAN_MASK));
} else {
netif_receive_skb(skb);
}
netdev->last_rx = jiffies;
rx_desc->status = 0;
rx_ring->buffer_info[i].skb = NULL;
i = (i + 1) % rx_ring->count;
rx_desc = IXGB_RX_DESC(*rx_ring, i);
received++;
}
if (!received)
received = 1;
ixgb_alloc_rx_buffers(adapter);
rx_ring->next_to_clean = i;
netdev->quota -= received;
*budget -= received;
netif_rx_complete(netdev);
/* NOTE: RAIDC will be automatically restarted by this enable */
ixgb_irq_enable(adapter);
return 0;
not_done:
ixgb_alloc_rx_buffers(adapter);
rx_ring->next_to_clean = i;
netdev->quota -= received;
*budget -= received;
return 1;
}
#else
/**
* ixgb_clean_rx_irq - Send received data up the network stack.
* @param adapter board private structure
**/
static void
ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
{
struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
struct ixgb_rx_desc *rx_desc;
struct sk_buff *skb;
u32 length;
int i;
i = rx_ring->next_to_clean;
rx_desc = IXGB_RX_DESC(*rx_ring, i);
while ((rx_desc->status & IXGB_RX_DESC_STATUS_DD)) {
pci_unmap_single(pdev, rx_ring->buffer_info[i].dma,
rx_ring->buffer_info[i].length,
PCI_DMA_FROMDEVICE);
skb = rx_ring->buffer_info[i].skb;
length = le16_to_cpu(rx_desc->length);
if (unlikely(!(rx_desc->status & IXGB_RX_DESC_STATUS_EOP))) {
/* All receives must fit into a single buffer */
IXGB_DBG("Receive packet consumed multiple buffers "
"length<%x>\n", length);
dev_kfree_skb_irq(skb);
rx_desc->status = 0;
rx_ring->buffer_info[i].skb = NULL;
i = (i + 1) % rx_ring->count;
rx_desc = IXGB_RX_DESC(*rx_ring, i);
continue;
}
if (unlikely(rx_desc->errors
& (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
| IXGB_RX_DESC_ERRORS_P |
IXGB_RX_DESC_ERRORS_RXE))) {
IXGB_DBG("Receive Errors Reported by Hardware-%x.\n",
rx_desc->errors);
dev_kfree_skb_irq(skb);
rx_desc->status = 0;
rx_ring->buffer_info[i].skb = NULL;
i = (i + 1) % rx_ring->count;
rx_desc = IXGB_RX_DESC(*rx_ring, i);
continue;
}
/* Good Receive */
skb_put(skb, length);
/* Receive Checksum Offload */
ixgb_rx_checksum(adapter, rx_desc, skb);
skb->protocol = eth_type_trans(skb, netdev);
if (adapter->vlgrp
&& (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) {
vlan_hwaccel_rx(skb, adapter->vlgrp,
(rx_desc->
special &
IXGB_RX_DESC_SPECIAL_VLAN_MASK));
} else {
netif_rx(skb);
}
netdev->last_rx = jiffies;
rx_desc->status = 0;
rx_ring->buffer_info[i].skb = NULL;
i = (i + 1) % rx_ring->count;
rx_desc = IXGB_RX_DESC(*rx_ring, i);
} /* while */
rx_ring->next_to_clean = i;
ixgb_alloc_rx_buffers(adapter);
}
#endif
/**
* ixgb_alloc_rx_buffers - Replace used receive buffers.
* @param adapter address of board private structure
**/
static void
ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
{
struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
struct ixgb_rx_desc *rx_desc;
struct sk_buff *skb;
int reserve_len;
int i;
int num_group_tail_writes;
long cleancount;
reserve_len = 2;
i = rx_ring->next_to_use;
cleancount = IXGB_DESC_UNUSED(rx_ring);
/* lessen this to 4 if we're
* in the midst of raidc and rbd is occuring
* because we don't want to delay returning buffers when low
*/
num_group_tail_writes = adapter->raidc ? 4 : IXGB_RX_BUFFER_WRITE;
/* leave one descriptor unused */
while (--cleancount > 0) {
rx_desc = IXGB_RX_DESC(*rx_ring, i);
/* allocate a new one */
skb = dev_alloc_skb(adapter->rx_buffer_len + reserve_len);
if (unlikely(!skb)) {
/* better luck next time around */
IXGB_DBG("Could not allocate SKB\n");
break;
}
/* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, reserve_len);
skb->dev = netdev;
rx_ring->buffer_info[i].skb = skb;
rx_ring->buffer_info[i].length = adapter->rx_buffer_len;
rx_ring->buffer_info[i].dma =
pci_map_single(pdev, skb->data, adapter->rx_buffer_len,
PCI_DMA_FROMDEVICE);
rx_desc->buff_addr = cpu_to_le64(rx_ring->buffer_info[i].dma);
if (!(i % num_group_tail_writes)) {
/* 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();
/* move tail */
IXGB_WRITE_REG(&adapter->hw, RDT, i);
}
i = (i + 1) % rx_ring->count;
}
rx_ring->next_to_use = i;
}
/**
* ixgb_ioctl - perform a command - e.g: ethtool:get_driver_info.
* @param netdev network interface device structure
* @param ifr data to be used/filled in by the ioctl command
* @param cmd ioctl command to execute
**/
int
ixgb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
switch (cmd) {
case SIOCETHTOOL:
return ixgb_ethtool_ioctl(netdev, ifr);
default:
return -EOPNOTSUPP;
}
return 0;
}
/**
* ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
*
* @param netdev network interface device structure
* @param grp indicates to enable or disable tagging/stripping
**/
static void
ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
{
struct ixgb_adapter *adapter = netdev->priv;
u32 ctrl, rctl;
ixgb_irq_disable(adapter);
adapter->vlgrp = grp;
if (grp) {
/* enable VLAN tag insert/strip */
ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
ctrl |= IXGB_CTRL0_VME;
IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
/* enable VLAN receive filtering */
rctl = IXGB_READ_REG(&adapter->hw, RCTL);
rctl |= IXGB_RCTL_VFE;
rctl &= ~IXGB_RCTL_CFIEN;
IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
} else {
/* disable VLAN tag insert/strip */
ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
ctrl &= ~IXGB_CTRL0_VME;
IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
/* disable VLAN filtering */
rctl = IXGB_READ_REG(&adapter->hw, RCTL);
rctl &= ~IXGB_RCTL_VFE;
IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
}
ixgb_irq_enable(adapter);
}
/**
* ixgb_vlan_rx_add_vid - adds a vlan id to be tagged/stripped in packet data.
* @param netdev network interface device structure
* @param vid the vlan to be added
**/
static void
ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
{
struct ixgb_adapter *adapter = netdev->priv;
u32 vfta, index;
/* add VID to filter table */
index = (vid >> 5) & 0x7F;
vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
vfta |= (1 << (vid & 0x1F));
ixgb_write_vfta(&adapter->hw, index, vfta);
}
/**
* ixgb_vlan_rx_kill_vid - removes a vlan id from tag/strip tables.
* @param netdev network interface device structure
* @param vid the vlan to be deleted
**/
static void
ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
{
struct ixgb_adapter *adapter = netdev->priv;
u32 vfta, index;
ixgb_irq_disable(adapter);
if (adapter->vlgrp)
adapter->vlgrp->vlan_devices[vid] = NULL;
ixgb_irq_enable(adapter);
/* remove VID from filter table */
index = (vid >> 5) & 0x7F;
vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
vfta &= ~(1 << (vid & 0x1F));
ixgb_write_vfta(&adapter->hw, index, vfta);
}
/**
* ixgb_restore_vlan - restores vlan settings after adapter reset.
* @param adapter the address of the board private structure
**/
static void
ixgb_restore_vlan(struct ixgb_adapter *adapter)
{
ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
if (adapter->vlgrp) {
u16 vid;
for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
if (!adapter->vlgrp->vlan_devices[vid])
continue;
ixgb_vlan_rx_add_vid(adapter->netdev, vid);
}
}
}
/**
* ixgb_rx_checksum - Receive Checksum Offload for 82597.
* @param adapter board private structure
* @param rx_desc receive descriptor
* @param skb socket buffer with received data
**/
static inline void
ixgb_rx_checksum(struct ixgb_adapter *adapter,
struct ixgb_rx_desc *rx_desc, struct sk_buff *skb)
{
/* Ignore Checksum bit is set OR
* TCP Checksum has not been calculated
*/
if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
(!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
skb->ip_summed = CHECKSUM_NONE;
return;
}
/* At this point we know the hardware did the TCP checksum
* now look at the TCP checksum error bit
*/
if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
/* let the stack verify checksum errors */
skb->ip_summed = CHECKSUM_NONE;
adapter->hw_csum_rx_error++;
} else {
/* TCP checksum is good */
skb->ip_summed = CHECKSUM_UNNECESSARY;
adapter->hw_csum_rx_good++;
}
}
/**
* ixgb_write_pci_cfg - write PCI configuration space.
* @param hw board specific data structure
* @param reg PCI configuration space register to write to
* @param value Value to be written to reg
**/
void
ixgb_write_pci_cfg(struct ixgb_hw *hw, u32 reg, u16 * value)
{
struct ixgb_adapter *adapter = (struct ixgb_adapter *) hw->back;
pci_write_config_word(adapter->pdev, reg, *value);
}
/**
* ixgb_notify_reboot - handles OS notification of reboot event.
* @param nb notifier block, unused
* @param event Event being passed to driver to act upon
* @param p A pointer to our net device
**/
static int
ixgb_notify_reboot(struct notifier_block *nb, unsigned long event, void *p)
{
struct pci_dev *pdev = NULL;
switch (event) {
case SYS_DOWN:
case SYS_HALT:
case SYS_POWER_OFF:
while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
if (pci_dev_driver(pdev) == &ixgb_driver)
ixgb_suspend(pdev, 3);
}
}
return NOTIFY_DONE;
}
/**
* ixgb_suspend - driver suspend function called from notify.
* @param pdev pci driver structure used for passing to
* @param state power state to enter
**/
static int
ixgb_suspend(struct pci_dev *pdev, u32 state)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct ixgb_adapter *adapter = netdev->priv;
netif_device_detach(netdev);
if (netif_running(netdev))
ixgb_down(adapter, TRUE);
pci_save_state(pdev, adapter->pci_state);
state = (state > 0) ? 3 : 0;
pci_set_power_state(pdev, state);
msec_delay(200);
return 0;
}
/* ixgb_main.c */
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Return to ixgb_main.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
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