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android_kernel_motorola_sm6225/drivers/net/e1000/e1000_main.c
Jeff Kirsher a1415ee655 [PATCH] e1000: revert to single descriptor for legacy receive path 
A recent patch attempted to enable more efficient memory usage by using
only 2kB descriptors for jumbo frames.  The method used to implement this
has since been commented upon as "illegal" and in recent kernels even
causes a BUG when receiving ip fragments while using jumbo frames.
This patch simply goes back to the way things were.  We expect some
complaints due to order 3 allocations failing to come back due to this
change.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
2006-02-28 20:24:07 -08:00

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/*******************************************************************************
Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The full GNU General Public License is included in this distribution in the
file called LICENSE.
Contact Information:
Linux NICS <linux.nics@intel.com>
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*******************************************************************************/
#include "e1000.h"
/* Change Log
* 6.3.9 12/16/2005
* o incorporate fix for recycled skbs from IBM LTC
* 6.3.7 11/18/2005
* o Honor eeprom setting for enabling/disabling Wake On Lan
* 6.3.5 11/17/2005
* o Fix memory leak in rx ring handling for PCI Express adapters
* 6.3.4 11/8/05
* o Patch from Jesper Juhl to remove redundant NULL checks for kfree
* 6.3.2 9/20/05
* o Render logic that sets/resets DRV_LOAD as inline functions to
* avoid code replication. If f/w is AMT then set DRV_LOAD only when
* network interface is open.
* o Handle DRV_LOAD set/reset in cases where AMT uses VLANs.
* o Adjust PBA partioning for Jumbo frames using MTU size and not
* rx_buffer_len
* 6.3.1 9/19/05
* o Use adapter->tx_timeout_factor in Tx Hung Detect logic
(e1000_clean_tx_irq)
* o Support for 8086:10B5 device (Quad Port)
* 6.2.14 9/15/05
* o In AMT enabled configurations, set/reset DRV_LOAD bit on interface
* open/close
* 6.2.13 9/14/05
* o Invoke e1000_check_mng_mode only for 8257x controllers since it
* accesses the FWSM that is not supported in other controllers
* 6.2.12 9/9/05
* o Add support for device id E1000_DEV_ID_82546GB_QUAD_COPPER
* o set RCTL:SECRC only for controllers newer than 82543.
* o When the n/w interface comes down reset DRV_LOAD bit to notify f/w.
* This code was moved from e1000_remove to e1000_close
* 6.2.10 9/6/05
* o Fix error in updating RDT in el1000_alloc_rx_buffers[_ps] -- one off.
* o Enable fc by default on 82573 controllers (do not read eeprom)
* o Fix rx_errors statistic not to include missed_packet_count
* o Fix rx_dropped statistic not to include missed_packet_count
(Padraig Brady)
* 6.2.9 8/30/05
* o Remove call to update statistics from the controller ib e1000_get_stats
* 6.2.8 8/30/05
* o Improved algorithm for rx buffer allocation/rdt update
* o Flow control watermarks relative to rx PBA size
* o Simplified 'Tx Hung' detect logic
* 6.2.7 8/17/05
* o Report rx buffer allocation failures and tx timeout counts in stats
* 6.2.6 8/16/05
* o Implement workaround for controller erratum -- linear non-tso packet
* following a TSO gets written back prematurely
* 6.2.5 8/15/05
* o Set netdev->tx_queue_len based on link speed/duplex settings.
* o Fix net_stats.rx_fifo_errors <p@draigBrady.com>
* o Do not power off PHY if SoL/IDER session is active
* 6.2.4 8/10/05
* o Fix loopback test setup/cleanup for 82571/3 controllers
* o Fix parsing of outgoing packets (e1000_transfer_dhcp_info) to treat
* all packets as raw
* o Prevent operations that will cause the PHY to be reset if SoL/IDER
* sessions are active and log a message
* 6.2.2 7/21/05
* o used fixed size descriptors for all MTU sizes, reduces memory load
* 6.1.2 4/13/05
* o Fixed ethtool diagnostics
* o Enabled flow control to take default eeprom settings
* o Added stats_lock around e1000_read_phy_reg commands to avoid concurrent
* calls, one from mii_ioctl and other from within update_stats while
* processing MIIREG ioctl.
*/
char e1000_driver_name[] = "e1000";
static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
#ifndef CONFIG_E1000_NAPI
#define DRIVERNAPI
#else
#define DRIVERNAPI "-NAPI"
#endif
#define DRV_VERSION "6.3.9-k4"DRIVERNAPI
char e1000_driver_version[] = DRV_VERSION;
static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
/* e1000_pci_tbl - PCI Device ID Table
*
* Last entry must be all 0s
*
* Macro expands to...
* {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
*/
static struct pci_device_id e1000_pci_tbl[] = {
INTEL_E1000_ETHERNET_DEVICE(0x1000),
INTEL_E1000_ETHERNET_DEVICE(0x1001),
INTEL_E1000_ETHERNET_DEVICE(0x1004),
INTEL_E1000_ETHERNET_DEVICE(0x1008),
INTEL_E1000_ETHERNET_DEVICE(0x1009),
INTEL_E1000_ETHERNET_DEVICE(0x100C),
INTEL_E1000_ETHERNET_DEVICE(0x100D),
INTEL_E1000_ETHERNET_DEVICE(0x100E),
INTEL_E1000_ETHERNET_DEVICE(0x100F),
INTEL_E1000_ETHERNET_DEVICE(0x1010),
INTEL_E1000_ETHERNET_DEVICE(0x1011),
INTEL_E1000_ETHERNET_DEVICE(0x1012),
INTEL_E1000_ETHERNET_DEVICE(0x1013),
INTEL_E1000_ETHERNET_DEVICE(0x1014),
INTEL_E1000_ETHERNET_DEVICE(0x1015),
INTEL_E1000_ETHERNET_DEVICE(0x1016),
INTEL_E1000_ETHERNET_DEVICE(0x1017),
INTEL_E1000_ETHERNET_DEVICE(0x1018),
INTEL_E1000_ETHERNET_DEVICE(0x1019),
INTEL_E1000_ETHERNET_DEVICE(0x101A),
INTEL_E1000_ETHERNET_DEVICE(0x101D),
INTEL_E1000_ETHERNET_DEVICE(0x101E),
INTEL_E1000_ETHERNET_DEVICE(0x1026),
INTEL_E1000_ETHERNET_DEVICE(0x1027),
INTEL_E1000_ETHERNET_DEVICE(0x1028),
INTEL_E1000_ETHERNET_DEVICE(0x105E),
INTEL_E1000_ETHERNET_DEVICE(0x105F),
INTEL_E1000_ETHERNET_DEVICE(0x1060),
INTEL_E1000_ETHERNET_DEVICE(0x1075),
INTEL_E1000_ETHERNET_DEVICE(0x1076),
INTEL_E1000_ETHERNET_DEVICE(0x1077),
INTEL_E1000_ETHERNET_DEVICE(0x1078),
INTEL_E1000_ETHERNET_DEVICE(0x1079),
INTEL_E1000_ETHERNET_DEVICE(0x107A),
INTEL_E1000_ETHERNET_DEVICE(0x107B),
INTEL_E1000_ETHERNET_DEVICE(0x107C),
INTEL_E1000_ETHERNET_DEVICE(0x107D),
INTEL_E1000_ETHERNET_DEVICE(0x107E),
INTEL_E1000_ETHERNET_DEVICE(0x107F),
INTEL_E1000_ETHERNET_DEVICE(0x108A),
INTEL_E1000_ETHERNET_DEVICE(0x108B),
INTEL_E1000_ETHERNET_DEVICE(0x108C),
INTEL_E1000_ETHERNET_DEVICE(0x1099),
INTEL_E1000_ETHERNET_DEVICE(0x109A),
INTEL_E1000_ETHERNET_DEVICE(0x10B5),
/* required last entry */
{0,}
};
MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
int e1000_up(struct e1000_adapter *adapter);
void e1000_down(struct e1000_adapter *adapter);
void e1000_reset(struct e1000_adapter *adapter);
int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
struct e1000_tx_ring *txdr);
static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
struct e1000_rx_ring *rxdr);
static void e1000_free_tx_resources(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring);
static void e1000_free_rx_resources(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring);
void e1000_update_stats(struct e1000_adapter *adapter);
/* Local Function Prototypes */
static int e1000_init_module(void);
static void e1000_exit_module(void);
static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static void __devexit e1000_remove(struct pci_dev *pdev);
static int e1000_alloc_queues(struct e1000_adapter *adapter);
#ifdef CONFIG_E1000_MQ
static void e1000_setup_queue_mapping(struct e1000_adapter *adapter);
#endif
static int e1000_sw_init(struct e1000_adapter *adapter);
static int e1000_open(struct net_device *netdev);
static int e1000_close(struct net_device *netdev);
static void e1000_configure_tx(struct e1000_adapter *adapter);
static void e1000_configure_rx(struct e1000_adapter *adapter);
static void e1000_setup_rctl(struct e1000_adapter *adapter);
static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring);
static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring);
static void e1000_set_multi(struct net_device *netdev);
static void e1000_update_phy_info(unsigned long data);
static void e1000_watchdog(unsigned long data);
static void e1000_watchdog_task(struct e1000_adapter *adapter);
static void e1000_82547_tx_fifo_stall(unsigned long data);
static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
static int e1000_set_mac(struct net_device *netdev, void *p);
static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring);
#ifdef CONFIG_E1000_NAPI
static int e1000_clean(struct net_device *poll_dev, int *budget);
static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int *work_done, int work_to_do);
static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int *work_done, int work_to_do);
#else
static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring);
static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring);
#endif
static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int cleaned_count);
static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int cleaned_count);
static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
int cmd);
void e1000_set_ethtool_ops(struct net_device *netdev);
static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
static void e1000_tx_timeout(struct net_device *dev);
static void e1000_tx_timeout_task(struct net_device *dev);
static void e1000_smartspeed(struct e1000_adapter *adapter);
static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
struct sk_buff *skb);
static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
static void e1000_restore_vlan(struct e1000_adapter *adapter);
#ifdef CONFIG_PM
static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
static int e1000_resume(struct pci_dev *pdev);
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
/* for netdump / net console */
static void e1000_netpoll (struct net_device *netdev);
#endif
#ifdef CONFIG_E1000_MQ
/* for multiple Rx queues */
void e1000_rx_schedule(void *data);
#endif
/* Exported from other modules */
extern void e1000_check_options(struct e1000_adapter *adapter);
static struct pci_driver e1000_driver = {
.name = e1000_driver_name,
.id_table = e1000_pci_tbl,
.probe = e1000_probe,
.remove = __devexit_p(e1000_remove),
/* Power Managment Hooks */
#ifdef CONFIG_PM
.suspend = e1000_suspend,
.resume = e1000_resume
#endif
};
MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
/**
* e1000_init_module - Driver Registration Routine
*
* e1000_init_module is the first routine called when the driver is
* loaded. All it does is register with the PCI subsystem.
**/
static int __init
e1000_init_module(void)
{
int ret;
printk(KERN_INFO "%s - version %s\n",
e1000_driver_string, e1000_driver_version);
printk(KERN_INFO "%s\n", e1000_copyright);
ret = pci_module_init(&e1000_driver);
return ret;
}
module_init(e1000_init_module);
/**
* e1000_exit_module - Driver Exit Cleanup Routine
*
* e1000_exit_module is called just before the driver is removed
* from memory.
**/
static void __exit
e1000_exit_module(void)
{
pci_unregister_driver(&e1000_driver);
}
module_exit(e1000_exit_module);
/**
* e1000_irq_disable - Mask off interrupt generation on the NIC
* @adapter: board private structure
**/
static inline void
e1000_irq_disable(struct e1000_adapter *adapter)
{
atomic_inc(&adapter->irq_sem);
E1000_WRITE_REG(&adapter->hw, IMC, ~0);
E1000_WRITE_FLUSH(&adapter->hw);
synchronize_irq(adapter->pdev->irq);
}
/**
* e1000_irq_enable - Enable default interrupt generation settings
* @adapter: board private structure
**/
static inline void
e1000_irq_enable(struct e1000_adapter *adapter)
{
if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
E1000_WRITE_FLUSH(&adapter->hw);
}
}
static void
e1000_update_mng_vlan(struct e1000_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
uint16_t vid = adapter->hw.mng_cookie.vlan_id;
uint16_t old_vid = adapter->mng_vlan_id;
if (adapter->vlgrp) {
if (!adapter->vlgrp->vlan_devices[vid]) {
if (adapter->hw.mng_cookie.status &
E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
e1000_vlan_rx_add_vid(netdev, vid);
adapter->mng_vlan_id = vid;
} else
adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
(vid != old_vid) &&
!adapter->vlgrp->vlan_devices[old_vid])
e1000_vlan_rx_kill_vid(netdev, old_vid);
}
}
}
/**
* e1000_release_hw_control - release control of the h/w to f/w
* @adapter: address of board private structure
*
* e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
* For ASF and Pass Through versions of f/w this means that the
* driver is no longer loaded. For AMT version (only with 82573) i
* of the f/w this means that the netowrk i/f is closed.
*
**/
static inline void
e1000_release_hw_control(struct e1000_adapter *adapter)
{
uint32_t ctrl_ext;
uint32_t swsm;
/* Let firmware taken over control of h/w */
switch (adapter->hw.mac_type) {
case e1000_82571:
case e1000_82572:
ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
break;
case e1000_82573:
swsm = E1000_READ_REG(&adapter->hw, SWSM);
E1000_WRITE_REG(&adapter->hw, SWSM,
swsm & ~E1000_SWSM_DRV_LOAD);
default:
break;
}
}
/**
* e1000_get_hw_control - get control of the h/w from f/w
* @adapter: address of board private structure
*
* e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
* For ASF and Pass Through versions of f/w this means that
* the driver is loaded. For AMT version (only with 82573)
* of the f/w this means that the netowrk i/f is open.
*
**/
static inline void
e1000_get_hw_control(struct e1000_adapter *adapter)
{
uint32_t ctrl_ext;
uint32_t swsm;
/* Let firmware know the driver has taken over */
switch (adapter->hw.mac_type) {
case e1000_82571:
case e1000_82572:
ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
break;
case e1000_82573:
swsm = E1000_READ_REG(&adapter->hw, SWSM);
E1000_WRITE_REG(&adapter->hw, SWSM,
swsm | E1000_SWSM_DRV_LOAD);
break;
default:
break;
}
}
int
e1000_up(struct e1000_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
int i, err;
/* hardware has been reset, we need to reload some things */
/* Reset the PHY if it was previously powered down */
if (adapter->hw.media_type == e1000_media_type_copper) {
uint16_t mii_reg;
e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
if (mii_reg & MII_CR_POWER_DOWN)
e1000_phy_reset(&adapter->hw);
}
e1000_set_multi(netdev);
e1000_restore_vlan(adapter);
e1000_configure_tx(adapter);
e1000_setup_rctl(adapter);
e1000_configure_rx(adapter);
/* call E1000_DESC_UNUSED which always leaves
* at least 1 descriptor unused to make sure
* next_to_use != next_to_clean */
for (i = 0; i < adapter->num_rx_queues; i++) {
struct e1000_rx_ring *ring = &adapter->rx_ring[i];
adapter->alloc_rx_buf(adapter, ring,
E1000_DESC_UNUSED(ring));
}
#ifdef CONFIG_PCI_MSI
if (adapter->hw.mac_type > e1000_82547_rev_2) {
adapter->have_msi = TRUE;
if ((err = pci_enable_msi(adapter->pdev))) {
DPRINTK(PROBE, ERR,
"Unable to allocate MSI interrupt Error: %d\n", err);
adapter->have_msi = FALSE;
}
}
#endif
if ((err = request_irq(adapter->pdev->irq, &e1000_intr,
SA_SHIRQ | SA_SAMPLE_RANDOM,
netdev->name, netdev))) {
DPRINTK(PROBE, ERR,
"Unable to allocate interrupt Error: %d\n", err);
return err;
}
#ifdef CONFIG_E1000_MQ
e1000_setup_queue_mapping(adapter);
#endif
adapter->tx_queue_len = netdev->tx_queue_len;
mod_timer(&adapter->watchdog_timer, jiffies);
#ifdef CONFIG_E1000_NAPI
netif_poll_enable(netdev);
#endif
e1000_irq_enable(adapter);
return 0;
}
void
e1000_down(struct e1000_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
e1000_check_mng_mode(&adapter->hw);
e1000_irq_disable(adapter);
#ifdef CONFIG_E1000_MQ
while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
#endif
free_irq(adapter->pdev->irq, netdev);
#ifdef CONFIG_PCI_MSI
if (adapter->hw.mac_type > e1000_82547_rev_2 &&
adapter->have_msi == TRUE)
pci_disable_msi(adapter->pdev);
#endif
del_timer_sync(&adapter->tx_fifo_stall_timer);
del_timer_sync(&adapter->watchdog_timer);
del_timer_sync(&adapter->phy_info_timer);
#ifdef CONFIG_E1000_NAPI
netif_poll_disable(netdev);
#endif
netdev->tx_queue_len = adapter->tx_queue_len;
adapter->link_speed = 0;
adapter->link_duplex = 0;
netif_carrier_off(netdev);
netif_stop_queue(netdev);
e1000_reset(adapter);
e1000_clean_all_tx_rings(adapter);
e1000_clean_all_rx_rings(adapter);
/* Power down the PHY so no link is implied when interface is down *
* The PHY cannot be powered down if any of the following is TRUE *
* (a) WoL is enabled
* (b) AMT is active
* (c) SoL/IDER session is active */
if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
adapter->hw.media_type == e1000_media_type_copper &&
!(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
!mng_mode_enabled &&
!e1000_check_phy_reset_block(&adapter->hw)) {
uint16_t mii_reg;
e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
mii_reg |= MII_CR_POWER_DOWN;
e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
mdelay(1);
}
}
void
e1000_reset(struct e1000_adapter *adapter)
{
uint32_t pba, manc;
uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
/* Repartition Pba for greater than 9k mtu
* To take effect CTRL.RST is required.
*/
switch (adapter->hw.mac_type) {
case e1000_82547:
case e1000_82547_rev_2:
pba = E1000_PBA_30K;
break;
case e1000_82571:
case e1000_82572:
pba = E1000_PBA_38K;
break;
case e1000_82573:
pba = E1000_PBA_12K;
break;
default:
pba = E1000_PBA_48K;
break;
}
if ((adapter->hw.mac_type != e1000_82573) &&
(adapter->netdev->mtu > E1000_RXBUFFER_8192))
pba -= 8; /* allocate more FIFO for Tx */
if (adapter->hw.mac_type == e1000_82547) {
adapter->tx_fifo_head = 0;
adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
adapter->tx_fifo_size =
(E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
atomic_set(&adapter->tx_fifo_stall, 0);
}
E1000_WRITE_REG(&adapter->hw, PBA, pba);
/* flow control settings */
/* Set the FC high water mark to 90% of the FIFO size.
* Required to clear last 3 LSB */
fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
adapter->hw.fc_high_water = fc_high_water_mark;
adapter->hw.fc_low_water = fc_high_water_mark - 8;
adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
adapter->hw.fc_send_xon = 1;
adapter->hw.fc = adapter->hw.original_fc;
/* Allow time for pending master requests to run */
e1000_reset_hw(&adapter->hw);
if (adapter->hw.mac_type >= e1000_82544)
E1000_WRITE_REG(&adapter->hw, WUC, 0);
if (e1000_init_hw(&adapter->hw))
DPRINTK(PROBE, ERR, "Hardware Error\n");
e1000_update_mng_vlan(adapter);
/* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
e1000_reset_adaptive(&adapter->hw);
e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
if (adapter->en_mng_pt) {
manc = E1000_READ_REG(&adapter->hw, MANC);
manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
E1000_WRITE_REG(&adapter->hw, MANC, manc);
}
}
/**
* e1000_probe - Device Initialization Routine
* @pdev: PCI device information struct
* @ent: entry in e1000_pci_tbl
*
* Returns 0 on success, negative on failure
*
* e1000_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
e1000_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct net_device *netdev;
struct e1000_adapter *adapter;
unsigned long mmio_start, mmio_len;
static int cards_found = 0;
int i, err, pci_using_dac;
uint16_t eeprom_data;
uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
if ((err = pci_enable_device(pdev)))
return err;
if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
pci_using_dac = 1;
} else {
if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
E1000_ERR("No usable DMA configuration, aborting\n");
return err;
}
pci_using_dac = 0;
}
if ((err = pci_request_regions(pdev, e1000_driver_name)))
return err;
pci_set_master(pdev);
netdev = alloc_etherdev(sizeof(struct e1000_adapter));
if (!netdev) {
err = -ENOMEM;
goto err_alloc_etherdev;
}
SET_MODULE_OWNER(netdev);
SET_NETDEV_DEV(netdev, &pdev->dev);
pci_set_drvdata(pdev, netdev);
adapter = netdev_priv(netdev);
adapter->netdev = netdev;
adapter->pdev = pdev;
adapter->hw.back = adapter;
adapter->msg_enable = (1 << debug) - 1;
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) {
err = -EIO;
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;
}
}
netdev->open = &e1000_open;
netdev->stop = &e1000_close;
netdev->hard_start_xmit = &e1000_xmit_frame;
netdev->get_stats = &e1000_get_stats;
netdev->set_multicast_list = &e1000_set_multi;
netdev->set_mac_address = &e1000_set_mac;
netdev->change_mtu = &e1000_change_mtu;
netdev->do_ioctl = &e1000_ioctl;
e1000_set_ethtool_ops(netdev);
netdev->tx_timeout = &e1000_tx_timeout;
netdev->watchdog_timeo = 5 * HZ;
#ifdef CONFIG_E1000_NAPI
netdev->poll = &e1000_clean;
netdev->weight = 64;
#endif
netdev->vlan_rx_register = e1000_vlan_rx_register;
netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
#ifdef CONFIG_NET_POLL_CONTROLLER
netdev->poll_controller = e1000_netpoll;
#endif
strcpy(netdev->name, pci_name(pdev));
netdev->mem_start = mmio_start;
netdev->mem_end = mmio_start + mmio_len;
netdev->base_addr = adapter->hw.io_base;
adapter->bd_number = cards_found;
/* setup the private structure */
if ((err = e1000_sw_init(adapter)))
goto err_sw_init;
if ((err = e1000_check_phy_reset_block(&adapter->hw)))
DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
if (adapter->hw.mac_type >= e1000_82543) {
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
if ((adapter->hw.mac_type >= e1000_82544) &&
(adapter->hw.mac_type != e1000_82547))
netdev->features |= NETIF_F_TSO;
#ifdef NETIF_F_TSO_IPV6
if (adapter->hw.mac_type > e1000_82547_rev_2)
netdev->features |= NETIF_F_TSO_IPV6;
#endif
#endif
if (pci_using_dac)
netdev->features |= NETIF_F_HIGHDMA;
/* hard_start_xmit is safe against parallel locking */
netdev->features |= NETIF_F_LLTX;
adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
/* before reading the EEPROM, reset the controller to
* put the device in a known good starting state */
e1000_reset_hw(&adapter->hw);
/* make sure the EEPROM is good */
if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
err = -EIO;
goto err_eeprom;
}
/* copy the MAC address out of the EEPROM */
if (e1000_read_mac_addr(&adapter->hw))
DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
if (!is_valid_ether_addr(netdev->perm_addr)) {
DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
err = -EIO;
goto err_eeprom;
}
e1000_read_part_num(&adapter->hw, &(adapter->part_num));
e1000_get_bus_info(&adapter->hw);
init_timer(&adapter->tx_fifo_stall_timer);
adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
init_timer(&adapter->watchdog_timer);
adapter->watchdog_timer.function = &e1000_watchdog;
adapter->watchdog_timer.data = (unsigned long) adapter;
INIT_WORK(&adapter->watchdog_task,
(void (*)(void *))e1000_watchdog_task, adapter);
init_timer(&adapter->phy_info_timer);
adapter->phy_info_timer.function = &e1000_update_phy_info;
adapter->phy_info_timer.data = (unsigned long) adapter;
INIT_WORK(&adapter->tx_timeout_task,
(void (*)(void *))e1000_tx_timeout_task, netdev);
/* we're going to reset, so assume we have no link for now */
netif_carrier_off(netdev);
netif_stop_queue(netdev);
e1000_check_options(adapter);
/* Initial Wake on LAN setting
* If APM wake is enabled in the EEPROM,
* enable the ACPI Magic Packet filter
*/
switch (adapter->hw.mac_type) {
case e1000_82542_rev2_0:
case e1000_82542_rev2_1:
case e1000_82543:
break;
case e1000_82544:
e1000_read_eeprom(&adapter->hw,
EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
eeprom_apme_mask = E1000_EEPROM_82544_APM;
break;
case e1000_82546:
case e1000_82546_rev_3:
case e1000_82571:
if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
e1000_read_eeprom(&adapter->hw,
EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
break;
}
/* Fall Through */
default:
e1000_read_eeprom(&adapter->hw,
EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
break;
}
if (eeprom_data & eeprom_apme_mask)
adapter->wol |= E1000_WUFC_MAG;
/* print bus type/speed/width info */
{
struct e1000_hw *hw = &adapter->hw;
DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
(hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
(hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
(hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
(hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
(hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
(hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
(hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
"32-bit"));
}
for (i = 0; i < 6; i++)
printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
/* reset the hardware with the new settings */
e1000_reset(adapter);
/* If the controller is 82573 and f/w is AMT, do not set
* DRV_LOAD until the interface is up. For all other cases,
* let the f/w know that the h/w is now under the control
* of the driver. */
if (adapter->hw.mac_type != e1000_82573 ||
!e1000_check_mng_mode(&adapter->hw))
e1000_get_hw_control(adapter);
strcpy(netdev->name, "eth%d");
if ((err = register_netdev(netdev)))
goto err_register;
DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
cards_found++;
return 0;
err_register:
err_sw_init:
err_eeprom:
iounmap(adapter->hw.hw_addr);
err_ioremap:
free_netdev(netdev);
err_alloc_etherdev:
pci_release_regions(pdev);
return err;
}
/**
* e1000_remove - Device Removal Routine
* @pdev: PCI device information struct
*
* e1000_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
e1000_remove(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct e1000_adapter *adapter = netdev_priv(netdev);
uint32_t manc;
#ifdef CONFIG_E1000_NAPI
int i;
#endif
flush_scheduled_work();
if (adapter->hw.mac_type >= e1000_82540 &&
adapter->hw.media_type == e1000_media_type_copper) {
manc = E1000_READ_REG(&adapter->hw, MANC);
if (manc & E1000_MANC_SMBUS_EN) {
manc |= E1000_MANC_ARP_EN;
E1000_WRITE_REG(&adapter->hw, MANC, manc);
}
}
/* Release control of h/w to f/w. If f/w is AMT enabled, this
* would have already happened in close and is redundant. */
e1000_release_hw_control(adapter);
unregister_netdev(netdev);
#ifdef CONFIG_E1000_NAPI
for (i = 0; i < adapter->num_rx_queues; i++)
__dev_put(&adapter->polling_netdev[i]);
#endif
if (!e1000_check_phy_reset_block(&adapter->hw))
e1000_phy_hw_reset(&adapter->hw);
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);
#ifdef CONFIG_E1000_NAPI
kfree(adapter->polling_netdev);
#endif
iounmap(adapter->hw.hw_addr);
pci_release_regions(pdev);
#ifdef CONFIG_E1000_MQ
free_percpu(adapter->cpu_netdev);
free_percpu(adapter->cpu_tx_ring);
#endif
free_netdev(netdev);
pci_disable_device(pdev);
}
/**
* e1000_sw_init - Initialize general software structures (struct e1000_adapter)
* @adapter: board private structure to initialize
*
* e1000_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
e1000_sw_init(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
#ifdef CONFIG_E1000_NAPI
int i;
#endif
/* 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);
adapter->rx_buffer_len = E1000_RXBUFFER_2048;
adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
hw->max_frame_size = netdev->mtu +
ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
/* identify the MAC */
if (e1000_set_mac_type(hw)) {
DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
return -EIO;
}
/* initialize eeprom parameters */
if (e1000_init_eeprom_params(hw)) {
E1000_ERR("EEPROM initialization failed\n");
return -EIO;
}
switch (hw->mac_type) {
default:
break;
case e1000_82541:
case e1000_82547:
case e1000_82541_rev_2:
case e1000_82547_rev_2:
hw->phy_init_script = 1;
break;
}
e1000_set_media_type(hw);
hw->wait_autoneg_complete = FALSE;
hw->tbi_compatibility_en = TRUE;
hw->adaptive_ifs = TRUE;
/* Copper options */
if (hw->media_type == e1000_media_type_copper) {
hw->mdix = AUTO_ALL_MODES;
hw->disable_polarity_correction = FALSE;
hw->master_slave = E1000_MASTER_SLAVE;
}
#ifdef CONFIG_E1000_MQ
/* Number of supported queues */
switch (hw->mac_type) {
case e1000_82571:
case e1000_82572:
/* These controllers support 2 tx queues, but with a single
* qdisc implementation, multiple tx queues aren't quite as
* interesting. If we can find a logical way of mapping
* flows to a queue, then perhaps we can up the num_tx_queue
* count back to its default. Until then, we run the risk of
* terrible performance due to SACK overload. */
adapter->num_tx_queues = 1;
adapter->num_rx_queues = 2;
break;
default:
adapter->num_tx_queues = 1;
adapter->num_rx_queues = 1;
break;
}
adapter->num_rx_queues = min(adapter->num_rx_queues, num_online_cpus());
adapter->num_tx_queues = min(adapter->num_tx_queues, num_online_cpus());
DPRINTK(DRV, INFO, "Multiqueue Enabled: Rx Queue count = %u %s\n",
adapter->num_rx_queues,
((adapter->num_rx_queues == 1)
? ((num_online_cpus() > 1)
? "(due to unsupported feature in current adapter)"
: "(due to unsupported system configuration)")
: ""));
DPRINTK(DRV, INFO, "Multiqueue Enabled: Tx Queue count = %u\n",
adapter->num_tx_queues);
#else
adapter->num_tx_queues = 1;
adapter->num_rx_queues = 1;
#endif
if (e1000_alloc_queues(adapter)) {
DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
return -ENOMEM;
}
#ifdef CONFIG_E1000_NAPI
for (i = 0; i < adapter->num_rx_queues; i++) {
adapter->polling_netdev[i].priv = adapter;
adapter->polling_netdev[i].poll = &e1000_clean;
adapter->polling_netdev[i].weight = 64;
dev_hold(&adapter->polling_netdev[i]);
set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
}
spin_lock_init(&adapter->tx_queue_lock);
#endif
atomic_set(&adapter->irq_sem, 1);
spin_lock_init(&adapter->stats_lock);
return 0;
}
/**
* e1000_alloc_queues - Allocate memory for all rings
* @adapter: board private structure to initialize
*
* We allocate one ring per queue at run-time since we don't know the
* number of queues at compile-time. The polling_netdev array is
* intended for Multiqueue, but should work fine with a single queue.
**/
static int __devinit
e1000_alloc_queues(struct e1000_adapter *adapter)
{
int size;
size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
adapter->tx_ring = kmalloc(size, GFP_KERNEL);
if (!adapter->tx_ring)
return -ENOMEM;
memset(adapter->tx_ring, 0, size);
size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
adapter->rx_ring = kmalloc(size, GFP_KERNEL);
if (!adapter->rx_ring) {
kfree(adapter->tx_ring);
return -ENOMEM;
}
memset(adapter->rx_ring, 0, size);
#ifdef CONFIG_E1000_NAPI
size = sizeof(struct net_device) * adapter->num_rx_queues;
adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
if (!adapter->polling_netdev) {
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);
return -ENOMEM;
}
memset(adapter->polling_netdev, 0, size);
#endif
#ifdef CONFIG_E1000_MQ
adapter->rx_sched_call_data.func = e1000_rx_schedule;
adapter->rx_sched_call_data.info = adapter->netdev;
adapter->cpu_netdev = alloc_percpu(struct net_device *);
adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
#endif
return E1000_SUCCESS;
}
#ifdef CONFIG_E1000_MQ
static void __devinit
e1000_setup_queue_mapping(struct e1000_adapter *adapter)
{
int i, cpu;
adapter->rx_sched_call_data.func = e1000_rx_schedule;
adapter->rx_sched_call_data.info = adapter->netdev;
cpus_clear(adapter->rx_sched_call_data.cpumask);
adapter->cpu_netdev = alloc_percpu(struct net_device *);
adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
lock_cpu_hotplug();
i = 0;
for_each_online_cpu(cpu) {
*per_cpu_ptr(adapter->cpu_tx_ring, cpu) = &adapter->tx_ring[i % adapter->num_tx_queues];
/* This is incomplete because we'd like to assign separate
* physical cpus to these netdev polling structures and
* avoid saturating a subset of cpus.
*/
if (i < adapter->num_rx_queues) {
*per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
adapter->rx_ring[i].cpu = cpu;
cpu_set(cpu, adapter->cpumask);
} else
*per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
i++;
}
unlock_cpu_hotplug();
}
#endif
/**
* e1000_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
e1000_open(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
int err;
/* allocate transmit descriptors */
if ((err = e1000_setup_all_tx_resources(adapter)))
goto err_setup_tx;
/* allocate receive descriptors */
if ((err = e1000_setup_all_rx_resources(adapter)))
goto err_setup_rx;
if ((err = e1000_up(adapter)))
goto err_up;
adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
if ((adapter->hw.mng_cookie.status &
E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
e1000_update_mng_vlan(adapter);
}
/* If AMT is enabled, let the firmware know that the network
* interface is now open */
if (adapter->hw.mac_type == e1000_82573 &&
e1000_check_mng_mode(&adapter->hw))
e1000_get_hw_control(adapter);
return E1000_SUCCESS;
err_up:
e1000_free_all_rx_resources(adapter);
err_setup_rx:
e1000_free_all_tx_resources(adapter);
err_setup_tx:
e1000_reset(adapter);
return err;
}
/**
* e1000_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
e1000_close(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
e1000_down(adapter);
e1000_free_all_tx_resources(adapter);
e1000_free_all_rx_resources(adapter);
if ((adapter->hw.mng_cookie.status &
E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
}
/* If AMT is enabled, let the firmware know that the network
* interface is now closed */
if (adapter->hw.mac_type == e1000_82573 &&
e1000_check_mng_mode(&adapter->hw))
e1000_release_hw_control(adapter);
return 0;
}
/**
* e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
* @adapter: address of board private structure
* @start: address of beginning of memory
* @len: length of memory
**/
static inline boolean_t
e1000_check_64k_bound(struct e1000_adapter *adapter,
void *start, unsigned long len)
{
unsigned long begin = (unsigned long) start;
unsigned long end = begin + len;
/* First rev 82545 and 82546 need to not allow any memory
* write location to cross 64k boundary due to errata 23 */
if (adapter->hw.mac_type == e1000_82545 ||
adapter->hw.mac_type == e1000_82546) {
return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
}
return TRUE;
}
/**
* e1000_setup_tx_resources - allocate Tx resources (Descriptors)
* @adapter: board private structure
* @txdr: tx descriptor ring (for a specific queue) to setup
*
* Return 0 on success, negative on failure
**/
static int
e1000_setup_tx_resources(struct e1000_adapter *adapter,
struct e1000_tx_ring *txdr)
{
struct pci_dev *pdev = adapter->pdev;
int size;
size = sizeof(struct e1000_buffer) * txdr->count;
txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
if (!txdr->buffer_info) {
DPRINTK(PROBE, ERR,
"Unable to allocate memory for the transmit descriptor ring\n");
return -ENOMEM;
}
memset(txdr->buffer_info, 0, size);
/* round up to nearest 4K */
txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
E1000_ROUNDUP(txdr->size, 4096);
txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
if (!txdr->desc) {
setup_tx_desc_die:
vfree(txdr->buffer_info);
DPRINTK(PROBE, ERR,
"Unable to allocate memory for the transmit descriptor ring\n");
return -ENOMEM;
}
/* Fix for errata 23, can't cross 64kB boundary */
if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
void *olddesc = txdr->desc;
dma_addr_t olddma = txdr->dma;
DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
"at %p\n", txdr->size, txdr->desc);
/* Try again, without freeing the previous */
txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
/* Failed allocation, critical failure */
if (!txdr->desc) {
pci_free_consistent(pdev, txdr->size, olddesc, olddma);
goto setup_tx_desc_die;
}
if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
/* give up */
pci_free_consistent(pdev, txdr->size, txdr->desc,
txdr->dma);
pci_free_consistent(pdev, txdr->size, olddesc, olddma);
DPRINTK(PROBE, ERR,
"Unable to allocate aligned memory "
"for the transmit descriptor ring\n");
vfree(txdr->buffer_info);
return -ENOMEM;
} else {
/* Free old allocation, new allocation was successful */
pci_free_consistent(pdev, txdr->size, olddesc, olddma);
}
}
memset(txdr->desc, 0, txdr->size);
txdr->next_to_use = 0;
txdr->next_to_clean = 0;
spin_lock_init(&txdr->tx_lock);
return 0;
}
/**
* e1000_setup_all_tx_resources - wrapper to allocate Tx resources
* (Descriptors) for all queues
* @adapter: board private structure
*
* If this function returns with an error, then it's possible one or
* more of the rings is populated (while the rest are not). It is the
* callers duty to clean those orphaned rings.
*
* Return 0 on success, negative on failure
**/
int
e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
{
int i, err = 0;
for (i = 0; i < adapter->num_tx_queues; i++) {
err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
if (err) {
DPRINTK(PROBE, ERR,
"Allocation for Tx Queue %u failed\n", i);
break;
}
}
return err;
}
/**
* e1000_configure_tx - Configure 8254x Transmit Unit after Reset
* @adapter: board private structure
*
* Configure the Tx unit of the MAC after a reset.
**/
static void
e1000_configure_tx(struct e1000_adapter *adapter)
{
uint64_t tdba;
struct e1000_hw *hw = &adapter->hw;
uint32_t tdlen, tctl, tipg, tarc;
uint32_t ipgr1, ipgr2;
/* Setup the HW Tx Head and Tail descriptor pointers */
switch (adapter->num_tx_queues) {
case 2:
tdba = adapter->tx_ring[1].dma;
tdlen = adapter->tx_ring[1].count *
sizeof(struct e1000_tx_desc);
E1000_WRITE_REG(hw, TDBAL1, (tdba & 0x00000000ffffffffULL));
E1000_WRITE_REG(hw, TDBAH1, (tdba >> 32));
E1000_WRITE_REG(hw, TDLEN1, tdlen);
E1000_WRITE_REG(hw, TDH1, 0);
E1000_WRITE_REG(hw, TDT1, 0);
adapter->tx_ring[1].tdh = E1000_TDH1;
adapter->tx_ring[1].tdt = E1000_TDT1;
/* Fall Through */
case 1:
default:
tdba = adapter->tx_ring[0].dma;
tdlen = adapter->tx_ring[0].count *
sizeof(struct e1000_tx_desc);
E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
E1000_WRITE_REG(hw, TDLEN, tdlen);
E1000_WRITE_REG(hw, TDH, 0);
E1000_WRITE_REG(hw, TDT, 0);
adapter->tx_ring[0].tdh = E1000_TDH;
adapter->tx_ring[0].tdt = E1000_TDT;
break;
}
/* Set the default values for the Tx Inter Packet Gap timer */
if (hw->media_type == e1000_media_type_fiber ||
hw->media_type == e1000_media_type_internal_serdes)
tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
else
tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
switch (hw->mac_type) {
case e1000_82542_rev2_0:
case e1000_82542_rev2_1:
tipg = DEFAULT_82542_TIPG_IPGT;
ipgr1 = DEFAULT_82542_TIPG_IPGR1;
ipgr2 = DEFAULT_82542_TIPG_IPGR2;
break;
default:
ipgr1 = DEFAULT_82543_TIPG_IPGR1;
ipgr2 = DEFAULT_82543_TIPG_IPGR2;
break;
}
tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
E1000_WRITE_REG(hw, TIPG, tipg);
/* Set the Tx Interrupt Delay register */
E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
if (hw->mac_type >= e1000_82540)
E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
/* Program the Transmit Control Register */
tctl = E1000_READ_REG(hw, TCTL);
tctl &= ~E1000_TCTL_CT;
tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | E1000_TCTL_RTLC |
(E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
E1000_WRITE_REG(hw, TCTL, tctl);
if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
tarc = E1000_READ_REG(hw, TARC0);
tarc |= ((1 << 25) | (1 << 21));
E1000_WRITE_REG(hw, TARC0, tarc);
tarc = E1000_READ_REG(hw, TARC1);
tarc |= (1 << 25);
if (tctl & E1000_TCTL_MULR)
tarc &= ~(1 << 28);
else
tarc |= (1 << 28);
E1000_WRITE_REG(hw, TARC1, tarc);
}
e1000_config_collision_dist(hw);
/* Setup Transmit Descriptor Settings for eop descriptor */
adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
E1000_TXD_CMD_IFCS;
if (hw->mac_type < e1000_82543)
adapter->txd_cmd |= E1000_TXD_CMD_RPS;
else
adapter->txd_cmd |= E1000_TXD_CMD_RS;
/* Cache if we're 82544 running in PCI-X because we'll
* need this to apply a workaround later in the send path. */
if (hw->mac_type == e1000_82544 &&
hw->bus_type == e1000_bus_type_pcix)
adapter->pcix_82544 = 1;
}
/**
* e1000_setup_rx_resources - allocate Rx resources (Descriptors)
* @adapter: board private structure
* @rxdr: rx descriptor ring (for a specific queue) to setup
*
* Returns 0 on success, negative on failure
**/
static int
e1000_setup_rx_resources(struct e1000_adapter *adapter,
struct e1000_rx_ring *rxdr)
{
struct pci_dev *pdev = adapter->pdev;
int size, desc_len;
size = sizeof(struct e1000_buffer) * rxdr->count;
rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
if (!rxdr->buffer_info) {
DPRINTK(PROBE, ERR,
"Unable to allocate memory for the receive descriptor ring\n");
return -ENOMEM;
}
memset(rxdr->buffer_info, 0, size);
size = sizeof(struct e1000_ps_page) * rxdr->count;
rxdr->ps_page = kmalloc(size, GFP_KERNEL);
if (!rxdr->ps_page) {
vfree(rxdr->buffer_info);
DPRINTK(PROBE, ERR,
"Unable to allocate memory for the receive descriptor ring\n");
return -ENOMEM;
}
memset(rxdr->ps_page, 0, size);
size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
if (!rxdr->ps_page_dma) {
vfree(rxdr->buffer_info);
kfree(rxdr->ps_page);
DPRINTK(PROBE, ERR,
"Unable to allocate memory for the receive descriptor ring\n");
return -ENOMEM;
}
memset(rxdr->ps_page_dma, 0, size);
if (adapter->hw.mac_type <= e1000_82547_rev_2)
desc_len = sizeof(struct e1000_rx_desc);
else
desc_len = sizeof(union e1000_rx_desc_packet_split);
/* Round up to nearest 4K */
rxdr->size = rxdr->count * desc_len;
E1000_ROUNDUP(rxdr->size, 4096);
rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
if (!rxdr->desc) {
DPRINTK(PROBE, ERR,
"Unable to allocate memory for the receive descriptor ring\n");
setup_rx_desc_die:
vfree(rxdr->buffer_info);
kfree(rxdr->ps_page);
kfree(rxdr->ps_page_dma);
return -ENOMEM;
}
/* Fix for errata 23, can't cross 64kB boundary */
if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
void *olddesc = rxdr->desc;
dma_addr_t olddma = rxdr->dma;
DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
"at %p\n", rxdr->size, rxdr->desc);
/* Try again, without freeing the previous */
rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
/* Failed allocation, critical failure */
if (!rxdr->desc) {
pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
DPRINTK(PROBE, ERR,
"Unable to allocate memory "
"for the receive descriptor ring\n");
goto setup_rx_desc_die;
}
if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
/* give up */
pci_free_consistent(pdev, rxdr->size, rxdr->desc,
rxdr->dma);
pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
DPRINTK(PROBE, ERR,
"Unable to allocate aligned memory "
"for the receive descriptor ring\n");
goto setup_rx_desc_die;
} else {
/* Free old allocation, new allocation was successful */
pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
}
}
memset(rxdr->desc, 0, rxdr->size);
rxdr->next_to_clean = 0;
rxdr->next_to_use = 0;
return 0;
}
/**
* e1000_setup_all_rx_resources - wrapper to allocate Rx resources
* (Descriptors) for all queues
* @adapter: board private structure
*
* If this function returns with an error, then it's possible one or
* more of the rings is populated (while the rest are not). It is the
* callers duty to clean those orphaned rings.
*
* Return 0 on success, negative on failure
**/
int
e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
{
int i, err = 0;
for (i = 0; i < adapter->num_rx_queues; i++) {
err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
if (err) {
DPRINTK(PROBE, ERR,
"Allocation for Rx Queue %u failed\n", i);
break;
}
}
return err;
}
/**
* e1000_setup_rctl - configure the receive control registers
* @adapter: Board private structure
**/
#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
(((S) & (PAGE_SIZE - 1)) ? 1 : 0))
static void
e1000_setup_rctl(struct e1000_adapter *adapter)
{
uint32_t rctl, rfctl;
uint32_t psrctl = 0;
#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
uint32_t pages = 0;
#endif
rctl = E1000_READ_REG(&adapter->hw, RCTL);
rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
(adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
if (adapter->hw.mac_type > e1000_82543)
rctl |= E1000_RCTL_SECRC;
if (adapter->hw.tbi_compatibility_on == 1)
rctl |= E1000_RCTL_SBP;
else
rctl &= ~E1000_RCTL_SBP;
if (adapter->netdev->mtu <= ETH_DATA_LEN)
rctl &= ~E1000_RCTL_LPE;
else
rctl |= E1000_RCTL_LPE;
/* Setup buffer sizes */
if (adapter->hw.mac_type >= e1000_82571) {
/* We can now specify buffers in 1K increments.
* BSIZE and BSEX are ignored in this case. */
rctl |= adapter->rx_buffer_len << 0x11;
} else {
rctl &= ~E1000_RCTL_SZ_4096;
rctl |= E1000_RCTL_BSEX;
switch (adapter->rx_buffer_len) {
case E1000_RXBUFFER_2048:
default:
rctl |= E1000_RCTL_SZ_2048;
rctl &= ~E1000_RCTL_BSEX;
break;
case E1000_RXBUFFER_4096:
rctl |= E1000_RCTL_SZ_4096;
break;
case E1000_RXBUFFER_8192:
rctl |= E1000_RCTL_SZ_8192;
break;
case E1000_RXBUFFER_16384:
rctl |= E1000_RCTL_SZ_16384;
break;
}
}
#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
/* 82571 and greater support packet-split where the protocol
* header is placed in skb->data and the packet data is
* placed in pages hanging off of skb_shinfo(skb)->nr_frags.
* In the case of a non-split, skb->data is linearly filled,
* followed by the page buffers. Therefore, skb->data is
* sized to hold the largest protocol header.
*/
pages = PAGE_USE_COUNT(adapter->netdev->mtu);
if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
PAGE_SIZE <= 16384)
adapter->rx_ps_pages = pages;
else
adapter->rx_ps_pages = 0;
#endif
if (adapter->rx_ps_pages) {
/* Configure extra packet-split registers */
rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
rfctl |= E1000_RFCTL_EXTEN;
/* disable IPv6 packet split support */
rfctl |= E1000_RFCTL_IPV6_DIS;
E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
psrctl |= adapter->rx_ps_bsize0 >>
E1000_PSRCTL_BSIZE0_SHIFT;
switch (adapter->rx_ps_pages) {
case 3:
psrctl |= PAGE_SIZE <<
E1000_PSRCTL_BSIZE3_SHIFT;
case 2:
psrctl |= PAGE_SIZE <<
E1000_PSRCTL_BSIZE2_SHIFT;
case 1:
psrctl |= PAGE_SIZE >>
E1000_PSRCTL_BSIZE1_SHIFT;
break;
}
E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
}
E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
}
/**
* e1000_configure_rx - Configure 8254x Receive Unit after Reset
* @adapter: board private structure
*
* Configure the Rx unit of the MAC after a reset.
**/
static void
e1000_configure_rx(struct e1000_adapter *adapter)
{
uint64_t rdba;
struct e1000_hw *hw = &adapter->hw;
uint32_t rdlen, rctl, rxcsum, ctrl_ext;
#ifdef CONFIG_E1000_MQ
uint32_t reta, mrqc;
int i;
#endif
if (adapter->rx_ps_pages) {
rdlen = adapter->rx_ring[0].count *
sizeof(union e1000_rx_desc_packet_split);
adapter->clean_rx = e1000_clean_rx_irq_ps;
adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
} else {
rdlen = adapter->rx_ring[0].count *
sizeof(struct e1000_rx_desc);
adapter->clean_rx = e1000_clean_rx_irq;
adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
}
/* disable receives while setting up the descriptors */
rctl = E1000_READ_REG(hw, RCTL);
E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
/* set the Receive Delay Timer Register */
E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
if (hw->mac_type >= e1000_82540) {
E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
if (adapter->itr > 1)
E1000_WRITE_REG(hw, ITR,
1000000000 / (adapter->itr * 256));
}
if (hw->mac_type >= e1000_82571) {
ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
/* Reset delay timers after every interrupt */
ctrl_ext |= E1000_CTRL_EXT_CANC;
#ifdef CONFIG_E1000_NAPI
/* Auto-Mask interrupts upon ICR read. */
ctrl_ext |= E1000_CTRL_EXT_IAME;
#endif
E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
E1000_WRITE_REG(hw, IAM, ~0);
E1000_WRITE_FLUSH(hw);
}
/* Setup the HW Rx Head and Tail Descriptor Pointers and
* the Base and Length of the Rx Descriptor Ring */
switch (adapter->num_rx_queues) {
#ifdef CONFIG_E1000_MQ
case 2:
rdba = adapter->rx_ring[1].dma;
E1000_WRITE_REG(hw, RDBAL1, (rdba & 0x00000000ffffffffULL));
E1000_WRITE_REG(hw, RDBAH1, (rdba >> 32));
E1000_WRITE_REG(hw, RDLEN1, rdlen);
E1000_WRITE_REG(hw, RDH1, 0);
E1000_WRITE_REG(hw, RDT1, 0);
adapter->rx_ring[1].rdh = E1000_RDH1;
adapter->rx_ring[1].rdt = E1000_RDT1;
/* Fall Through */
#endif
case 1:
default:
rdba = adapter->rx_ring[0].dma;
E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
E1000_WRITE_REG(hw, RDLEN, rdlen);
E1000_WRITE_REG(hw, RDH, 0);
E1000_WRITE_REG(hw, RDT, 0);
adapter->rx_ring[0].rdh = E1000_RDH;
adapter->rx_ring[0].rdt = E1000_RDT;
break;
}
#ifdef CONFIG_E1000_MQ
if (adapter->num_rx_queues > 1) {
uint32_t random[10];
get_random_bytes(&random[0], 40);
if (hw->mac_type <= e1000_82572) {
E1000_WRITE_REG(hw, RSSIR, 0);
E1000_WRITE_REG(hw, RSSIM, 0);
}
switch (adapter->num_rx_queues) {
case 2:
default:
reta = 0x00800080;
mrqc = E1000_MRQC_ENABLE_RSS_2Q;
break;
}
/* Fill out redirection table */
for (i = 0; i < 32; i++)
E1000_WRITE_REG_ARRAY(hw, RETA, i, reta);
/* Fill out hash function seeds */
for (i = 0; i < 10; i++)
E1000_WRITE_REG_ARRAY(hw, RSSRK, i, random[i]);
mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
E1000_MRQC_RSS_FIELD_IPV4_TCP);
E1000_WRITE_REG(hw, MRQC, mrqc);
}
/* Multiqueue and packet checksumming are mutually exclusive. */
if (hw->mac_type >= e1000_82571) {
rxcsum = E1000_READ_REG(hw, RXCSUM);
rxcsum |= E1000_RXCSUM_PCSD;
E1000_WRITE_REG(hw, RXCSUM, rxcsum);
}
#else
/* Enable 82543 Receive Checksum Offload for TCP and UDP */
if (hw->mac_type >= e1000_82543) {
rxcsum = E1000_READ_REG(hw, RXCSUM);
if (adapter->rx_csum == TRUE) {
rxcsum |= E1000_RXCSUM_TUOFL;
/* Enable 82571 IPv4 payload checksum for UDP fragments
* Must be used in conjunction with packet-split. */
if ((hw->mac_type >= e1000_82571) &&
(adapter->rx_ps_pages)) {
rxcsum |= E1000_RXCSUM_IPPCSE;
}
} else {
rxcsum &= ~E1000_RXCSUM_TUOFL;
/* don't need to clear IPPCSE as it defaults to 0 */
}
E1000_WRITE_REG(hw, RXCSUM, rxcsum);
}
#endif /* CONFIG_E1000_MQ */
if (hw->mac_type == e1000_82573)
E1000_WRITE_REG(hw, ERT, 0x0100);
/* Enable Receives */
E1000_WRITE_REG(hw, RCTL, rctl);
}
/**
* e1000_free_tx_resources - Free Tx Resources per Queue
* @adapter: board private structure
* @tx_ring: Tx descriptor ring for a specific queue
*
* Free all transmit software resources
**/
static void
e1000_free_tx_resources(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring)
{
struct pci_dev *pdev = adapter->pdev;
e1000_clean_tx_ring(adapter, tx_ring);
vfree(tx_ring->buffer_info);
tx_ring->buffer_info = NULL;
pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
tx_ring->desc = NULL;
}
/**
* e1000_free_all_tx_resources - Free Tx Resources for All Queues
* @adapter: board private structure
*
* Free all transmit software resources
**/
void
e1000_free_all_tx_resources(struct e1000_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_tx_queues; i++)
e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
}
static inline void
e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
struct e1000_buffer *buffer_info)
{
if (buffer_info->dma) {
pci_unmap_page(adapter->pdev,
buffer_info->dma,
buffer_info->length,
PCI_DMA_TODEVICE);
}
if (buffer_info->skb)
dev_kfree_skb_any(buffer_info->skb);
memset(buffer_info, 0, sizeof(struct e1000_buffer));
}
/**
* e1000_clean_tx_ring - Free Tx Buffers
* @adapter: board private structure
* @tx_ring: ring to be cleaned
**/
static void
e1000_clean_tx_ring(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring)
{
struct e1000_buffer *buffer_info;
unsigned long size;
unsigned int i;
/* Free all the Tx ring sk_buffs */
for (i = 0; i < tx_ring->count; i++) {
buffer_info = &tx_ring->buffer_info[i];
e1000_unmap_and_free_tx_resource(adapter, buffer_info);
}
size = sizeof(struct e1000_buffer) * tx_ring->count;
memset(tx_ring->buffer_info, 0, size);
/* Zero out the descriptor ring */
memset(tx_ring->desc, 0, tx_ring->size);
tx_ring->next_to_use = 0;
tx_ring->next_to_clean = 0;
tx_ring->last_tx_tso = 0;
writel(0, adapter->hw.hw_addr + tx_ring->tdh);
writel(0, adapter->hw.hw_addr + tx_ring->tdt);
}
/**
* e1000_clean_all_tx_rings - Free Tx Buffers for all queues
* @adapter: board private structure
**/
static void
e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_tx_queues; i++)
e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
}
/**
* e1000_free_rx_resources - Free Rx Resources
* @adapter: board private structure
* @rx_ring: ring to clean the resources from
*
* Free all receive software resources
**/
static void
e1000_free_rx_resources(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring)
{
struct pci_dev *pdev = adapter->pdev;
e1000_clean_rx_ring(adapter, rx_ring);
vfree(rx_ring->buffer_info);
rx_ring->buffer_info = NULL;
kfree(rx_ring->ps_page);
rx_ring->ps_page = NULL;
kfree(rx_ring->ps_page_dma);
rx_ring->ps_page_dma = NULL;
pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
rx_ring->desc = NULL;
}
/**
* e1000_free_all_rx_resources - Free Rx Resources for All Queues
* @adapter: board private structure
*
* Free all receive software resources
**/
void
e1000_free_all_rx_resources(struct e1000_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_rx_queues; i++)
e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
}
/**
* e1000_clean_rx_ring - Free Rx Buffers per Queue
* @adapter: board private structure
* @rx_ring: ring to free buffers from
**/
static void
e1000_clean_rx_ring(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring)
{
struct e1000_buffer *buffer_info;
struct e1000_ps_page *ps_page;
struct e1000_ps_page_dma *ps_page_dma;
struct pci_dev *pdev = adapter->pdev;
unsigned long size;
unsigned int i, j;
/* Free all the Rx ring sk_buffs */
for (i = 0; i < rx_ring->count; i++) {
buffer_info = &rx_ring->buffer_info[i];
if (buffer_info->skb) {
pci_unmap_single(pdev,
buffer_info->dma,
buffer_info->length,
PCI_DMA_FROMDEVICE);
dev_kfree_skb(buffer_info->skb);
buffer_info->skb = NULL;
}
ps_page = &rx_ring->ps_page[i];
ps_page_dma = &rx_ring->ps_page_dma[i];
for (j = 0; j < adapter->rx_ps_pages; j++) {
if (!ps_page->ps_page[j]) break;
pci_unmap_page(pdev,
ps_page_dma->ps_page_dma[j],
PAGE_SIZE, PCI_DMA_FROMDEVICE);
ps_page_dma->ps_page_dma[j] = 0;
put_page(ps_page->ps_page[j]);
ps_page->ps_page[j] = NULL;
}
}
size = sizeof(struct e1000_buffer) * rx_ring->count;
memset(rx_ring->buffer_info, 0, size);
size = sizeof(struct e1000_ps_page) * rx_ring->count;
memset(rx_ring->ps_page, 0, size);
size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
memset(rx_ring->ps_page_dma, 0, size);
/* Zero out the descriptor ring */
memset(rx_ring->desc, 0, rx_ring->size);
rx_ring->next_to_clean = 0;
rx_ring->next_to_use = 0;
writel(0, adapter->hw.hw_addr + rx_ring->rdh);
writel(0, adapter->hw.hw_addr + rx_ring->rdt);
}
/**
* e1000_clean_all_rx_rings - Free Rx Buffers for all queues
* @adapter: board private structure
**/
static void
e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_rx_queues; i++)
e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
}
/* The 82542 2.0 (revision 2) needs to have the receive unit in reset
* and memory write and invalidate disabled for certain operations
*/
static void
e1000_enter_82542_rst(struct e1000_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
uint32_t rctl;
e1000_pci_clear_mwi(&adapter->hw);
rctl = E1000_READ_REG(&adapter->hw, RCTL);
rctl |= E1000_RCTL_RST;
E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
E1000_WRITE_FLUSH(&adapter->hw);
mdelay(5);
if (netif_running(netdev))
e1000_clean_all_rx_rings(adapter);
}
static void
e1000_leave_82542_rst(struct e1000_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
uint32_t rctl;
rctl = E1000_READ_REG(&adapter->hw, RCTL);
rctl &= ~E1000_RCTL_RST;
E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
E1000_WRITE_FLUSH(&adapter->hw);
mdelay(5);
if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
e1000_pci_set_mwi(&adapter->hw);
if (netif_running(netdev)) {
/* No need to loop, because 82542 supports only 1 queue */
struct e1000_rx_ring *ring = &adapter->rx_ring[0];
e1000_configure_rx(adapter);
adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
}
}
/**
* e1000_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
e1000_set_mac(struct net_device *netdev, void *p)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
struct sockaddr *addr = p;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
/* 82542 2.0 needs to be in reset to write receive address registers */
if (adapter->hw.mac_type == e1000_82542_rev2_0)
e1000_enter_82542_rst(adapter);
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
/* With 82571 controllers, LAA may be overwritten (with the default)
* due to controller reset from the other port. */
if (adapter->hw.mac_type == e1000_82571) {
/* activate the work around */
adapter->hw.laa_is_present = 1;
/* Hold a copy of the LAA in RAR[14] This is done so that
* between the time RAR[0] gets clobbered and the time it
* gets fixed (in e1000_watchdog), the actual LAA is in one
* of the RARs and no incoming packets directed to this port
* are dropped. Eventaully the LAA will be in RAR[0] and
* RAR[14] */
e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
E1000_RAR_ENTRIES - 1);
}
if (adapter->hw.mac_type == e1000_82542_rev2_0)
e1000_leave_82542_rst(adapter);
return 0;
}
/**
* e1000_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
e1000_set_multi(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
struct dev_mc_list *mc_ptr;
uint32_t rctl;
uint32_t hash_value;
int i, rar_entries = E1000_RAR_ENTRIES;
/* reserve RAR[14] for LAA over-write work-around */
if (adapter->hw.mac_type == e1000_82571)
rar_entries--;
/* Check for Promiscuous and All Multicast modes */
rctl = E1000_READ_REG(hw, RCTL);
if (netdev->flags & IFF_PROMISC) {
rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
} else if (netdev->flags & IFF_ALLMULTI) {
rctl |= E1000_RCTL_MPE;
rctl &= ~E1000_RCTL_UPE;
} else {
rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
}
E1000_WRITE_REG(hw, RCTL, rctl);
/* 82542 2.0 needs to be in reset to write receive address registers */
if (hw->mac_type == e1000_82542_rev2_0)
e1000_enter_82542_rst(adapter);
/* load the first 14 multicast address into the exact filters 1-14
* RAR 0 is used for the station MAC adddress
* if there are not 14 addresses, go ahead and clear the filters
* -- with 82571 controllers only 0-13 entries are filled here
*/
mc_ptr = netdev->mc_list;
for (i = 1; i < rar_entries; i++) {
if (mc_ptr) {
e1000_rar_set(hw, mc_ptr->dmi_addr, i);
mc_ptr = mc_ptr->next;
} else {
E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
}
}
/* clear the old settings from the multicast hash table */
for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
/* load any remaining addresses into the hash table */
for (; mc_ptr; mc_ptr = mc_ptr->next) {
hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
e1000_mta_set(hw, hash_value);
}
if (hw->mac_type == e1000_82542_rev2_0)
e1000_leave_82542_rst(adapter);
}
/* Need to wait a few seconds after link up to get diagnostic information from
* the phy */
static void
e1000_update_phy_info(unsigned long data)
{
struct e1000_adapter *adapter = (struct e1000_adapter *) data;
e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
}
/**
* e1000_82547_tx_fifo_stall - Timer Call-back
* @data: pointer to adapter cast into an unsigned long
**/
static void
e1000_82547_tx_fifo_stall(unsigned long data)
{
struct e1000_adapter *adapter = (struct e1000_adapter *) data;
struct net_device *netdev = adapter->netdev;
uint32_t tctl;
if (atomic_read(&adapter->tx_fifo_stall)) {
if ((E1000_READ_REG(&adapter->hw, TDT) ==
E1000_READ_REG(&adapter->hw, TDH)) &&
(E1000_READ_REG(&adapter->hw, TDFT) ==
E1000_READ_REG(&adapter->hw, TDFH)) &&
(E1000_READ_REG(&adapter->hw, TDFTS) ==
E1000_READ_REG(&adapter->hw, TDFHS))) {
tctl = E1000_READ_REG(&adapter->hw, TCTL);
E1000_WRITE_REG(&adapter->hw, TCTL,
tctl & ~E1000_TCTL_EN);
E1000_WRITE_REG(&adapter->hw, TDFT,
adapter->tx_head_addr);
E1000_WRITE_REG(&adapter->hw, TDFH,
adapter->tx_head_addr);
E1000_WRITE_REG(&adapter->hw, TDFTS,
adapter->tx_head_addr);
E1000_WRITE_REG(&adapter->hw, TDFHS,
adapter->tx_head_addr);
E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
E1000_WRITE_FLUSH(&adapter->hw);
adapter->tx_fifo_head = 0;
atomic_set(&adapter->tx_fifo_stall, 0);
netif_wake_queue(netdev);
} else {
mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
}
}
}
/**
* e1000_watchdog - Timer Call-back
* @data: pointer to adapter cast into an unsigned long
**/
static void
e1000_watchdog(unsigned long data)
{
struct e1000_adapter *adapter = (struct e1000_adapter *) data;
/* Do the rest outside of interrupt context */
schedule_work(&adapter->watchdog_task);
}
static void
e1000_watchdog_task(struct e1000_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
struct e1000_tx_ring *txdr = adapter->tx_ring;
uint32_t link;
e1000_check_for_link(&adapter->hw);
if (adapter->hw.mac_type == e1000_82573) {
e1000_enable_tx_pkt_filtering(&adapter->hw);
if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
e1000_update_mng_vlan(adapter);
}
if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
!(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
link = !adapter->hw.serdes_link_down;
else
link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
if (link) {
if (!netif_carrier_ok(netdev)) {
e1000_get_speed_and_duplex(&adapter->hw,
&adapter->link_speed,
&adapter->link_duplex);
DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
adapter->link_speed,
adapter->link_duplex == FULL_DUPLEX ?
"Full Duplex" : "Half Duplex");
/* tweak tx_queue_len according to speed/duplex */
netdev->tx_queue_len = adapter->tx_queue_len;
adapter->tx_timeout_factor = 1;
if (adapter->link_duplex == HALF_DUPLEX) {
switch (adapter->link_speed) {
case SPEED_10:
netdev->tx_queue_len = 10;
adapter->tx_timeout_factor = 8;
break;
case SPEED_100:
netdev->tx_queue_len = 100;
break;
}
}
netif_carrier_on(netdev);
netif_wake_queue(netdev);
mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
adapter->smartspeed = 0;
}
} else {
if (netif_carrier_ok(netdev)) {
adapter->link_speed = 0;
adapter->link_duplex = 0;
DPRINTK(LINK, INFO, "NIC Link is Down\n");
netif_carrier_off(netdev);
netif_stop_queue(netdev);
mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
}
e1000_smartspeed(adapter);
}
e1000_update_stats(adapter);
adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
adapter->tpt_old = adapter->stats.tpt;
adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
adapter->colc_old = adapter->stats.colc;
adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
adapter->gorcl_old = adapter->stats.gorcl;
adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
adapter->gotcl_old = adapter->stats.gotcl;
e1000_update_adaptive(&adapter->hw);
#ifdef CONFIG_E1000_MQ
txdr = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
#endif
if (!netif_carrier_ok(netdev)) {
if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
/* We've lost link, so the controller stops DMA,
* but we've got queued Tx work that's never going
* to get done, so reset controller to flush Tx.
* (Do the reset outside of interrupt context). */
schedule_work(&adapter->tx_timeout_task);
}
}
/* Dynamic mode for Interrupt Throttle Rate (ITR) */
if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
/* Symmetric Tx/Rx gets a reduced ITR=2000; Total
* asymmetrical Tx or Rx gets ITR=8000; everyone
* else is between 2000-8000. */
uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
uint32_t dif = (adapter->gotcl > adapter->gorcl ?
adapter->gotcl - adapter->gorcl :
adapter->gorcl - adapter->gotcl) / 10000;
uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
}
/* Cause software interrupt to ensure rx ring is cleaned */
E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
/* Force detection of hung controller every watchdog period */
adapter->detect_tx_hung = TRUE;
/* With 82571 controllers, LAA may be overwritten due to controller
* reset from the other port. Set the appropriate LAA in RAR[0] */
if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
/* Reset the timer */
mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
}
#define E1000_TX_FLAGS_CSUM 0x00000001
#define E1000_TX_FLAGS_VLAN 0x00000002
#define E1000_TX_FLAGS_TSO 0x00000004
#define E1000_TX_FLAGS_IPV4 0x00000008
#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
#define E1000_TX_FLAGS_VLAN_SHIFT 16
static inline int
e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
struct sk_buff *skb)
{
#ifdef NETIF_F_TSO
struct e1000_context_desc *context_desc;
struct e1000_buffer *buffer_info;
unsigned int i;
uint32_t cmd_length = 0;
uint16_t ipcse = 0, tucse, mss;
uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
int err;
if (skb_shinfo(skb)->tso_size) {
if (skb_header_cloned(skb)) {
err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
if (err)
return err;
}
hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
mss = skb_shinfo(skb)->tso_size;
if (skb->protocol == ntohs(ETH_P_IP)) {
skb->nh.iph->tot_len = 0;
skb->nh.iph->check = 0;
skb->h.th->check =
~csum_tcpudp_magic(skb->nh.iph->saddr,
skb->nh.iph->daddr,
0,
IPPROTO_TCP,
0);
cmd_length = E1000_TXD_CMD_IP;
ipcse = skb->h.raw - skb->data - 1;
#ifdef NETIF_F_TSO_IPV6
} else if (skb->protocol == ntohs(ETH_P_IPV6)) {
skb->nh.ipv6h->payload_len = 0;
skb->h.th->check =
~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
&skb->nh.ipv6h->daddr,
0,
IPPROTO_TCP,
0);
ipcse = 0;
#endif
}
ipcss = skb->nh.raw - skb->data;
ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
tucss = skb->h.raw - skb->data;
tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
tucse = 0;
cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
i = tx_ring->next_to_use;
context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
buffer_info = &tx_ring->buffer_info[i];
context_desc->lower_setup.ip_fields.ipcss = ipcss;
context_desc->lower_setup.ip_fields.ipcso = ipcso;
context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
context_desc->upper_setup.tcp_fields.tucss = tucss;
context_desc->upper_setup.tcp_fields.tucso = tucso;
context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
context_desc->cmd_and_length = cpu_to_le32(cmd_length);
buffer_info->time_stamp = jiffies;
if (++i == tx_ring->count) i = 0;
tx_ring->next_to_use = i;
return TRUE;
}
#endif
return FALSE;
}
static inline boolean_t
e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
struct sk_buff *skb)
{
struct e1000_context_desc *context_desc;
struct e1000_buffer *buffer_info;
unsigned int i;
uint8_t css;
if (likely(skb->ip_summed == CHECKSUM_HW)) {
css = skb->h.raw - skb->data;
i = tx_ring->next_to_use;
buffer_info = &tx_ring->buffer_info[i];
context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
context_desc->upper_setup.tcp_fields.tucss = css;
context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
context_desc->upper_setup.tcp_fields.tucse = 0;
context_desc->tcp_seg_setup.data = 0;
context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
buffer_info->time_stamp = jiffies;
if (unlikely(++i == tx_ring->count)) i = 0;
tx_ring->next_to_use = i;
return TRUE;
}
return FALSE;
}
#define E1000_MAX_TXD_PWR 12
#define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
static inline int
e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
unsigned int nr_frags, unsigned int mss)
{
struct e1000_buffer *buffer_info;
unsigned int len = skb->len;
unsigned int offset = 0, size, count = 0, i;
unsigned int f;
len -= skb->data_len;
i = tx_ring->next_to_use;
while (len) {
buffer_info = &tx_ring->buffer_info[i];
size = min(len, max_per_txd);
#ifdef NETIF_F_TSO
/* Workaround for Controller erratum --
* descriptor for non-tso packet in a linear SKB that follows a
* tso gets written back prematurely before the data is fully
* DMAd to the controller */
if (!skb->data_len && tx_ring->last_tx_tso &&
!skb_shinfo(skb)->tso_size) {
tx_ring->last_tx_tso = 0;
size -= 4;
}
/* Workaround for premature desc write-backs
* in TSO mode. Append 4-byte sentinel desc */
if (unlikely(mss && !nr_frags && size == len && size > 8))
size -= 4;
#endif
/* work-around for errata 10 and it applies
* to all controllers in PCI-X mode
* The fix is to make sure that the first descriptor of a
* packet is smaller than 2048 - 16 - 16 (or 2016) bytes
*/
if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
(size > 2015) && count == 0))
size = 2015;
/* Workaround for potential 82544 hang in PCI-X. Avoid
* terminating buffers within evenly-aligned dwords. */
if (unlikely(adapter->pcix_82544 &&
!((unsigned long)(skb->data + offset + size - 1) & 4) &&
size > 4))
size -= 4;
buffer_info->length = size;
buffer_info->dma =
pci_map_single(adapter->pdev,
skb->data + offset,
size,
PCI_DMA_TODEVICE);
buffer_info->time_stamp = jiffies;
len -= size;
offset += size;
count++;
if (unlikely(++i == tx_ring->count)) i = 0;
}
for (f = 0; f < nr_frags; f++) {
struct skb_frag_struct *frag;
frag = &skb_shinfo(skb)->frags[f];
len = frag->size;
offset = frag->page_offset;
while (len) {
buffer_info = &tx_ring->buffer_info[i];
size = min(len, max_per_txd);
#ifdef NETIF_F_TSO
/* Workaround for premature desc write-backs
* in TSO mode. Append 4-byte sentinel desc */
if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
size -= 4;
#endif
/* Workaround for potential 82544 hang in PCI-X.
* Avoid terminating buffers within evenly-aligned
* dwords. */
if (unlikely(adapter->pcix_82544 &&
!((unsigned long)(frag->page+offset+size-1) & 4) &&
size > 4))
size -= 4;
buffer_info->length = size;
buffer_info->dma =
pci_map_page(adapter->pdev,
frag->page,
offset,
size,
PCI_DMA_TODEVICE);
buffer_info->time_stamp = jiffies;
len -= size;
offset += size;
count++;
if (unlikely(++i == tx_ring->count)) i = 0;
}
}
i = (i == 0) ? tx_ring->count - 1 : i - 1;
tx_ring->buffer_info[i].skb = skb;
tx_ring->buffer_info[first].next_to_watch = i;
return count;
}
static inline void
e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
int tx_flags, int count)
{
struct e1000_tx_desc *tx_desc = NULL;
struct e1000_buffer *buffer_info;
uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
unsigned int i;
if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
E1000_TXD_CMD_TSE;
txd_upper |= E1000_TXD_POPTS_TXSM << 8;
if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
txd_upper |= E1000_TXD_POPTS_IXSM << 8;
}
if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
txd_upper |= E1000_TXD_POPTS_TXSM << 8;
}
if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
txd_lower |= E1000_TXD_CMD_VLE;
txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
}
i = tx_ring->next_to_use;
while (count--) {
buffer_info = &tx_ring->buffer_info[i];
tx_desc = E1000_TX_DESC(*tx_ring, i);
tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
tx_desc->lower.data =
cpu_to_le32(txd_lower | buffer_info->length);
tx_desc->upper.data = cpu_to_le32(txd_upper);
if (unlikely(++i == tx_ring->count)) i = 0;
}
tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
/* 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;
writel(i, adapter->hw.hw_addr + tx_ring->tdt);
}
/**
* 82547 workaround to avoid controller hang in half-duplex environment.
* The workaround is to avoid queuing a large packet that would span
* the internal Tx FIFO ring boundary by notifying the stack to resend
* the packet at a later time. This gives the Tx FIFO an opportunity to
* flush all packets. When that occurs, we reset the Tx FIFO pointers
* to the beginning of the Tx FIFO.
**/
#define E1000_FIFO_HDR 0x10
#define E1000_82547_PAD_LEN 0x3E0
static inline int
e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
{
uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
if (adapter->link_duplex != HALF_DUPLEX)
goto no_fifo_stall_required;
if (atomic_read(&adapter->tx_fifo_stall))
return 1;
if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
atomic_set(&adapter->tx_fifo_stall, 1);
return 1;
}
no_fifo_stall_required:
adapter->tx_fifo_head += skb_fifo_len;
if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
adapter->tx_fifo_head -= adapter->tx_fifo_size;
return 0;
}
#define MINIMUM_DHCP_PACKET_SIZE 282
static inline int
e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
{
struct e1000_hw *hw = &adapter->hw;
uint16_t length, offset;
if (vlan_tx_tag_present(skb)) {
if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
( adapter->hw.mng_cookie.status &
E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
return 0;
}
if ((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
struct ethhdr *eth = (struct ethhdr *) skb->data;
if ((htons(ETH_P_IP) == eth->h_proto)) {
const struct iphdr *ip =
(struct iphdr *)((uint8_t *)skb->data+14);
if (IPPROTO_UDP == ip->protocol) {
struct udphdr *udp =
(struct udphdr *)((uint8_t *)ip +
(ip->ihl << 2));
if (ntohs(udp->dest) == 67) {
offset = (uint8_t *)udp + 8 - skb->data;
length = skb->len - offset;
return e1000_mng_write_dhcp_info(hw,
(uint8_t *)udp + 8,
length);
}
}
}
}
return 0;
}
#define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
static int
e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_tx_ring *tx_ring;
unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
unsigned int tx_flags = 0;
unsigned int len = skb->len;
unsigned long flags;
unsigned int nr_frags = 0;
unsigned int mss = 0;
int count = 0;
int tso;
unsigned int f;
len -= skb->data_len;
#ifdef CONFIG_E1000_MQ
tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
#else
tx_ring = adapter->tx_ring;
#endif
if (unlikely(skb->len <= 0)) {
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
#ifdef NETIF_F_TSO
mss = skb_shinfo(skb)->tso_size;
/* The controller does a simple calculation to
* make sure there is enough room in the FIFO before
* initiating the DMA for each buffer. The calc is:
* 4 = ceil(buffer len/mss). To make sure we don't
* overrun the FIFO, adjust the max buffer len if mss
* drops. */
if (mss) {
uint8_t hdr_len;
max_per_txd = min(mss << 2, max_per_txd);
max_txd_pwr = fls(max_per_txd) - 1;
/* TSO Workaround for 82571/2 Controllers -- if skb->data
* points to just header, pull a few bytes of payload from
* frags into skb->data */
hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
if (skb->data_len && (hdr_len == (skb->len - skb->data_len)) &&
(adapter->hw.mac_type == e1000_82571 ||
adapter->hw.mac_type == e1000_82572)) {
unsigned int pull_size;
pull_size = min((unsigned int)4, skb->data_len);
if (!__pskb_pull_tail(skb, pull_size)) {
printk(KERN_ERR "__pskb_pull_tail failed.\n");
dev_kfree_skb_any(skb);
return -EFAULT;
}
len = skb->len - skb->data_len;
}
}
/* reserve a descriptor for the offload context */
if ((mss) || (skb->ip_summed == CHECKSUM_HW))
count++;
count++;
#else
if (skb->ip_summed == CHECKSUM_HW)
count++;
#endif
#ifdef NETIF_F_TSO
/* Controller Erratum workaround */
if (!skb->data_len && tx_ring->last_tx_tso &&
!skb_shinfo(skb)->tso_size)
count++;
#endif
count += TXD_USE_COUNT(len, max_txd_pwr);
if (adapter->pcix_82544)
count++;
/* work-around for errata 10 and it applies to all controllers
* in PCI-X mode, so add one more descriptor to the count
*/
if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
(len > 2015)))
count++;
nr_frags = skb_shinfo(skb)->nr_frags;
for (f = 0; f < nr_frags; f++)
count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
max_txd_pwr);
if (adapter->pcix_82544)
count += nr_frags;
if (adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
e1000_transfer_dhcp_info(adapter, skb);
local_irq_save(flags);
if (!spin_trylock(&tx_ring->tx_lock)) {
/* Collision - tell upper layer to requeue */
local_irq_restore(flags);
return NETDEV_TX_LOCKED;
}
/* need: count + 2 desc gap to keep tail from touching
* head, otherwise try next time */
if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
netif_stop_queue(netdev);
spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
return NETDEV_TX_BUSY;
}
if (unlikely(adapter->hw.mac_type == e1000_82547)) {
if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
netif_stop_queue(netdev);
mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
return NETDEV_TX_BUSY;
}
}
if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
tx_flags |= E1000_TX_FLAGS_VLAN;
tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
}
first = tx_ring->next_to_use;
tso = e1000_tso(adapter, tx_ring, skb);
if (tso < 0) {
dev_kfree_skb_any(skb);
spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
return NETDEV_TX_OK;
}
if (likely(tso)) {
tx_ring->last_tx_tso = 1;
tx_flags |= E1000_TX_FLAGS_TSO;
} else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
tx_flags |= E1000_TX_FLAGS_CSUM;
/* Old method was to assume IPv4 packet by default if TSO was enabled.
* 82571 hardware supports TSO capabilities for IPv6 as well...
* no longer assume, we must. */
if (likely(skb->protocol == ntohs(ETH_P_IP)))
tx_flags |= E1000_TX_FLAGS_IPV4;
e1000_tx_queue(adapter, tx_ring, tx_flags,
e1000_tx_map(adapter, tx_ring, skb, first,
max_per_txd, nr_frags, mss));
netdev->trans_start = jiffies;
/* Make sure there is space in the ring for the next send. */
if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
netif_stop_queue(netdev);
spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
return NETDEV_TX_OK;
}
/**
* e1000_tx_timeout - Respond to a Tx Hang
* @netdev: network interface device structure
**/
static void
e1000_tx_timeout(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
/* Do the reset outside of interrupt context */
schedule_work(&adapter->tx_timeout_task);
}
static void
e1000_tx_timeout_task(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
adapter->tx_timeout_count++;
e1000_down(adapter);
e1000_up(adapter);
}
/**
* e1000_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 *
e1000_get_stats(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
/* only return the current stats */
return &adapter->net_stats;
}
/**
* e1000_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
e1000_change_mtu(struct net_device *netdev, int new_mtu)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
(max_frame > MAX_JUMBO_FRAME_SIZE)) {
DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
return -EINVAL;
}
/* Adapter-specific max frame size limits. */
switch (adapter->hw.mac_type) {
case e1000_82542_rev2_0:
case e1000_82542_rev2_1:
case e1000_82573:
if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
return -EINVAL;
}
break;
case e1000_82571:
case e1000_82572:
#define MAX_STD_JUMBO_FRAME_SIZE 9234
if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
return -EINVAL;
}
break;
default:
/* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
break;
}
if (adapter->hw.mac_type > e1000_82547_rev_2) {
adapter->rx_buffer_len = max_frame;
E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
} else {
if(unlikely((adapter->hw.mac_type < e1000_82543) &&
(max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
"on 82542\n");
return -EINVAL;
} else {
if(max_frame <= E1000_RXBUFFER_2048)
adapter->rx_buffer_len = E1000_RXBUFFER_2048;
else if(max_frame <= E1000_RXBUFFER_4096)
adapter->rx_buffer_len = E1000_RXBUFFER_4096;
else if(max_frame <= E1000_RXBUFFER_8192)
adapter->rx_buffer_len = E1000_RXBUFFER_8192;
else if(max_frame <= E1000_RXBUFFER_16384)
adapter->rx_buffer_len = E1000_RXBUFFER_16384;
}
}
netdev->mtu = new_mtu;
if (netif_running(netdev)) {
e1000_down(adapter);
e1000_up(adapter);
}
adapter->hw.max_frame_size = max_frame;
return 0;
}
/**
* e1000_update_stats - Update the board statistics counters
* @adapter: board private structure
**/
void
e1000_update_stats(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
unsigned long flags;
uint16_t phy_tmp;
#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
spin_lock_irqsave(&adapter->stats_lock, flags);
/* these counters are modified from e1000_adjust_tbi_stats,
* called from the interrupt context, so they must only
* be written while holding adapter->stats_lock
*/
adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
adapter->stats.roc += E1000_READ_REG(hw, ROC);
adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
adapter->stats.mpc += E1000_READ_REG(hw, MPC);
adapter->stats.scc += E1000_READ_REG(hw, SCC);
adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
adapter->stats.mcc += E1000_READ_REG(hw, MCC);
adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
adapter->stats.dc += E1000_READ_REG(hw, DC);
adapter->stats.sec += E1000_READ_REG(hw, SEC);
adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
adapter->stats.ruc += E1000_READ_REG(hw, RUC);
adapter->stats.rfc += E1000_READ_REG(hw, RFC);
adapter->stats.rjc += E1000_READ_REG(hw, RJC);
adapter->stats.torl += E1000_READ_REG(hw, TORL);
adapter->stats.torh += E1000_READ_REG(hw, TORH);
adapter->stats.totl += E1000_READ_REG(hw, TOTL);
adapter->stats.toth += E1000_READ_REG(hw, TOTH);
adapter->stats.tpr += E1000_READ_REG(hw, TPR);
adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
/* used for adaptive IFS */
hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
adapter->stats.tpt += hw->tx_packet_delta;
hw->collision_delta = E1000_READ_REG(hw, COLC);
adapter->stats.colc += hw->collision_delta;
if (hw->mac_type >= e1000_82543) {
adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
}
if (hw->mac_type > e1000_82547_rev_2) {
adapter->stats.iac += E1000_READ_REG(hw, IAC);
adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
}
/* Fill out the OS statistics structure */
adapter->net_stats.rx_packets = adapter->stats.gprc;
adapter->net_stats.tx_packets = adapter->stats.gptc;
adapter->net_stats.rx_bytes = adapter->stats.gorcl;
adapter->net_stats.tx_bytes = adapter->stats.gotcl;
adapter->net_stats.multicast = adapter->stats.mprc;
adapter->net_stats.collisions = adapter->stats.colc;
/* Rx Errors */
adapter->net_stats.rx_errors = adapter->stats.rxerrc +
adapter->stats.crcerrs + adapter->stats.algnerrc +
adapter->stats.rlec + adapter->stats.cexterr;
adapter->net_stats.rx_dropped = 0;
adapter->net_stats.rx_length_errors = adapter->stats.rlec;
adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
/* Tx Errors */
adapter->net_stats.tx_errors = adapter->stats.ecol +
adapter->stats.latecol;
adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
adapter->net_stats.tx_window_errors = adapter->stats.latecol;
adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
/* Tx Dropped needs to be maintained elsewhere */
/* Phy Stats */
if (hw->media_type == e1000_media_type_copper) {
if ((adapter->link_speed == SPEED_1000) &&
(!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
adapter->phy_stats.idle_errors += phy_tmp;
}
if ((hw->mac_type <= e1000_82546) &&
(hw->phy_type == e1000_phy_m88) &&
!e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
adapter->phy_stats.receive_errors += phy_tmp;
}
spin_unlock_irqrestore(&adapter->stats_lock, flags);
}
#ifdef CONFIG_E1000_MQ
void
e1000_rx_schedule(void *data)
{
struct net_device *poll_dev, *netdev = data;
struct e1000_adapter *adapter = netdev->priv;
int this_cpu = get_cpu();
poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
if (poll_dev == NULL) {
put_cpu();
return;
}
if (likely(netif_rx_schedule_prep(poll_dev)))
__netif_rx_schedule(poll_dev);
else
e1000_irq_enable(adapter);
put_cpu();
}
#endif
/**
* e1000_intr - Interrupt Handler
* @irq: interrupt number
* @data: pointer to a network interface device structure
* @pt_regs: CPU registers structure
**/
static irqreturn_t
e1000_intr(int irq, void *data, struct pt_regs *regs)
{
struct net_device *netdev = data;
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
uint32_t icr = E1000_READ_REG(hw, ICR);
#ifndef CONFIG_E1000_NAPI
int i;
#else
/* Interrupt Auto-Mask...upon reading ICR,
* interrupts are masked. No need for the
* IMC write, but it does mean we should
* account for it ASAP. */
if (likely(hw->mac_type >= e1000_82571))
atomic_inc(&adapter->irq_sem);
#endif
if (unlikely(!icr)) {
#ifdef CONFIG_E1000_NAPI
if (hw->mac_type >= e1000_82571)
e1000_irq_enable(adapter);
#endif
return IRQ_NONE; /* Not our interrupt */
}
if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
hw->get_link_status = 1;
mod_timer(&adapter->watchdog_timer, jiffies);
}
#ifdef CONFIG_E1000_NAPI
if (unlikely(hw->mac_type < e1000_82571)) {
atomic_inc(&adapter->irq_sem);
E1000_WRITE_REG(hw, IMC, ~0);
E1000_WRITE_FLUSH(hw);
}
#ifdef CONFIG_E1000_MQ
if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
/* We must setup the cpumask once count == 0 since
* each cpu bit is cleared when the work is done. */
adapter->rx_sched_call_data.cpumask = adapter->cpumask;
atomic_add(adapter->num_rx_queues - 1, &adapter->irq_sem);
atomic_set(&adapter->rx_sched_call_data.count,
adapter->num_rx_queues);
smp_call_async_mask(&adapter->rx_sched_call_data);
} else {
printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
}
#else /* if !CONFIG_E1000_MQ */
if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
__netif_rx_schedule(&adapter->polling_netdev[0]);
else
e1000_irq_enable(adapter);
#endif /* CONFIG_E1000_MQ */
#else /* if !CONFIG_E1000_NAPI */
/* Writing IMC and IMS is needed for 82547.
* Due to Hub Link bus being occupied, an interrupt
* de-assertion message is not able to be sent.
* When an interrupt assertion message is generated later,
* two messages are re-ordered and sent out.
* That causes APIC to think 82547 is in de-assertion
* state, while 82547 is in assertion state, resulting
* in dead lock. Writing IMC forces 82547 into
* de-assertion state.
*/
if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
atomic_inc(&adapter->irq_sem);
E1000_WRITE_REG(hw, IMC, ~0);
}
for (i = 0; i < E1000_MAX_INTR; i++)
if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
!e1000_clean_tx_irq(adapter, adapter->tx_ring)))
break;
if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
e1000_irq_enable(adapter);
#endif /* CONFIG_E1000_NAPI */
return IRQ_HANDLED;
}
#ifdef CONFIG_E1000_NAPI
/**
* e1000_clean - NAPI Rx polling callback
* @adapter: board private structure
**/
static int
e1000_clean(struct net_device *poll_dev, int *budget)
{
struct e1000_adapter *adapter;
int work_to_do = min(*budget, poll_dev->quota);
int tx_cleaned = 0, i = 0, work_done = 0;
/* Must NOT use netdev_priv macro here. */
adapter = poll_dev->priv;
/* Keep link state information with original netdev */
if (!netif_carrier_ok(adapter->netdev))
goto quit_polling;
while (poll_dev != &adapter->polling_netdev[i]) {
i++;
if (unlikely(i == adapter->num_rx_queues))
BUG();
}
if (likely(adapter->num_tx_queues == 1)) {
/* e1000_clean is called per-cpu. This lock protects
* tx_ring[0] from being cleaned by multiple cpus
* simultaneously. A failure obtaining the lock means
* tx_ring[0] is currently being cleaned anyway. */
if (spin_trylock(&adapter->tx_queue_lock)) {
tx_cleaned = e1000_clean_tx_irq(adapter,
&adapter->tx_ring[0]);
spin_unlock(&adapter->tx_queue_lock);
}
} else
tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
adapter->clean_rx(adapter, &adapter->rx_ring[i],
&work_done, work_to_do);
*budget -= work_done;
poll_dev->quota -= work_done;
/* If no Tx and not enough Rx work done, exit the polling mode */
if ((!tx_cleaned && (work_done == 0)) ||
!netif_running(adapter->netdev)) {
quit_polling:
netif_rx_complete(poll_dev);
e1000_irq_enable(adapter);
return 0;
}
return 1;
}
#endif
/**
* e1000_clean_tx_irq - Reclaim resources after transmit completes
* @adapter: board private structure
**/
static boolean_t
e1000_clean_tx_irq(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring)
{
struct net_device *netdev = adapter->netdev;
struct e1000_tx_desc *tx_desc, *eop_desc;
struct e1000_buffer *buffer_info;
unsigned int i, eop;
boolean_t cleaned = FALSE;
i = tx_ring->next_to_clean;
eop = tx_ring->buffer_info[i].next_to_watch;
eop_desc = E1000_TX_DESC(*tx_ring, eop);
while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
for (cleaned = FALSE; !cleaned; ) {
tx_desc = E1000_TX_DESC(*tx_ring, i);
buffer_info = &tx_ring->buffer_info[i];
cleaned = (i == eop);
#ifdef CONFIG_E1000_MQ
tx_ring->tx_stats.bytes += buffer_info->length;
#endif
e1000_unmap_and_free_tx_resource(adapter, buffer_info);
memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
if (unlikely(++i == tx_ring->count)) i = 0;
}
#ifdef CONFIG_E1000_MQ
tx_ring->tx_stats.packets++;
#endif
eop = tx_ring->buffer_info[i].next_to_watch;
eop_desc = E1000_TX_DESC(*tx_ring, eop);
}
tx_ring->next_to_clean = i;
spin_lock(&tx_ring->tx_lock);
if (unlikely(cleaned && netif_queue_stopped(netdev) &&
netif_carrier_ok(netdev)))
netif_wake_queue(netdev);
spin_unlock(&tx_ring->tx_lock);
if (adapter->detect_tx_hung) {
/* Detect a transmit hang in hardware, this serializes the
* check with the clearing of time_stamp and movement of i */
adapter->detect_tx_hung = FALSE;
if (tx_ring->buffer_info[eop].dma &&
time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
adapter->tx_timeout_factor * HZ)
&& !(E1000_READ_REG(&adapter->hw, STATUS) &
E1000_STATUS_TXOFF)) {
/* detected Tx unit hang */
DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
" Tx Queue <%lu>\n"
" TDH <%x>\n"
" TDT <%x>\n"
" next_to_use <%x>\n"
" next_to_clean <%x>\n"
"buffer_info[next_to_clean]\n"
" time_stamp <%lx>\n"
" next_to_watch <%x>\n"
" jiffies <%lx>\n"
" next_to_watch.status <%x>\n",
(unsigned long)((tx_ring - adapter->tx_ring) /
sizeof(struct e1000_tx_ring)),
readl(adapter->hw.hw_addr + tx_ring->tdh),
readl(adapter->hw.hw_addr + tx_ring->tdt),
tx_ring->next_to_use,
tx_ring->next_to_clean,
tx_ring->buffer_info[eop].time_stamp,
eop,
jiffies,
eop_desc->upper.fields.status);
netif_stop_queue(netdev);
}
}
return cleaned;
}
/**
* e1000_rx_checksum - Receive Checksum Offload for 82543
* @adapter: board private structure
* @status_err: receive descriptor status and error fields
* @csum: receive descriptor csum field
* @sk_buff: socket buffer with received data
**/
static inline void
e1000_rx_checksum(struct e1000_adapter *adapter,
uint32_t status_err, uint32_t csum,
struct sk_buff *skb)
{
uint16_t status = (uint16_t)status_err;
uint8_t errors = (uint8_t)(status_err >> 24);
skb->ip_summed = CHECKSUM_NONE;
/* 82543 or newer only */
if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
/* Ignore Checksum bit is set */
if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
/* TCP/UDP checksum error bit is set */
if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
/* let the stack verify checksum errors */
adapter->hw_csum_err++;
return;
}
/* TCP/UDP Checksum has not been calculated */
if (adapter->hw.mac_type <= e1000_82547_rev_2) {
if (!(status & E1000_RXD_STAT_TCPCS))
return;
} else {
if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
return;
}
/* It must be a TCP or UDP packet with a valid checksum */
if (likely(status & E1000_RXD_STAT_TCPCS)) {
/* TCP checksum is good */
skb->ip_summed = CHECKSUM_UNNECESSARY;
} else if (adapter->hw.mac_type > e1000_82547_rev_2) {
/* IP fragment with UDP payload */
/* Hardware complements the payload checksum, so we undo it
* and then put the value in host order for further stack use.
*/
csum = ntohl(csum ^ 0xFFFF);
skb->csum = csum;
skb->ip_summed = CHECKSUM_HW;
}
adapter->hw_csum_good++;
}
/**
* e1000_clean_rx_irq - Send received data up the network stack; legacy
* @adapter: board private structure
**/
static boolean_t
#ifdef CONFIG_E1000_NAPI
e1000_clean_rx_irq(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int *work_done, int work_to_do)
#else
e1000_clean_rx_irq(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring)
#endif
{
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
struct e1000_rx_desc *rx_desc, *next_rxd;
struct e1000_buffer *buffer_info, *next_buffer;
unsigned long flags;
uint32_t length;
uint8_t last_byte;
unsigned int i;
int cleaned_count = 0;
boolean_t cleaned = FALSE;
i = rx_ring->next_to_clean;
rx_desc = E1000_RX_DESC(*rx_ring, i);
buffer_info = &rx_ring->buffer_info[i];
while (rx_desc->status & E1000_RXD_STAT_DD) {
struct sk_buff *skb, *next_skb;
u8 status;
#ifdef CONFIG_E1000_NAPI
if (*work_done >= work_to_do)
break;
(*work_done)++;
#endif
status = rx_desc->status;
skb = buffer_info->skb;
buffer_info->skb = NULL;
if (++i == rx_ring->count) i = 0;
next_rxd = E1000_RX_DESC(*rx_ring, i);
next_buffer = &rx_ring->buffer_info[i];
next_skb = next_buffer->skb;
cleaned = TRUE;
cleaned_count++;
pci_unmap_single(pdev,
buffer_info->dma,
buffer_info->length,
PCI_DMA_FROMDEVICE);
length = le16_to_cpu(rx_desc->length);
if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
/* All receives must fit into a single buffer */
E1000_DBG("%s: Receive packet consumed multiple"
" buffers\n", netdev->name);
dev_kfree_skb_irq(skb);
goto next_desc;
}
if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
last_byte = *(skb->data + length - 1);
if (TBI_ACCEPT(&adapter->hw, status,
rx_desc->errors, length, last_byte)) {
spin_lock_irqsave(&adapter->stats_lock, flags);
e1000_tbi_adjust_stats(&adapter->hw,
&adapter->stats,
length, skb->data);
spin_unlock_irqrestore(&adapter->stats_lock,
flags);
length--;
} else {
dev_kfree_skb_irq(skb);
goto next_desc;
}
}
/* code added for copybreak, this should improve
* performance for small packets with large amounts
* of reassembly being done in the stack */
#define E1000_CB_LENGTH 256
if (length < E1000_CB_LENGTH) {
struct sk_buff *new_skb =
dev_alloc_skb(length + NET_IP_ALIGN);
if (new_skb) {
skb_reserve(new_skb, NET_IP_ALIGN);
new_skb->dev = netdev;
memcpy(new_skb->data - NET_IP_ALIGN,
skb->data - NET_IP_ALIGN,
length + NET_IP_ALIGN);
/* save the skb in buffer_info as good */
buffer_info->skb = skb;
skb = new_skb;
skb_put(skb, length);
}
} else
skb_put(skb, length);
/* end copybreak code */
/* Receive Checksum Offload */
e1000_rx_checksum(adapter,
(uint32_t)(status) |
((uint32_t)(rx_desc->errors) << 24),
rx_desc->csum, skb);
skb->protocol = eth_type_trans(skb, netdev);
#ifdef CONFIG_E1000_NAPI
if (unlikely(adapter->vlgrp &&
(status & E1000_RXD_STAT_VP))) {
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->special) &
E1000_RXD_SPC_VLAN_MASK);
} else {
netif_receive_skb(skb);
}
#else /* CONFIG_E1000_NAPI */
if (unlikely(adapter->vlgrp &&
(status & E1000_RXD_STAT_VP))) {
vlan_hwaccel_rx(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->special) &
E1000_RXD_SPC_VLAN_MASK);
} else {
netif_rx(skb);
}
#endif /* CONFIG_E1000_NAPI */
netdev->last_rx = jiffies;
#ifdef CONFIG_E1000_MQ
rx_ring->rx_stats.packets++;
rx_ring->rx_stats.bytes += length;
#endif
next_desc:
rx_desc->status = 0;
/* return some buffers to hardware, one at a time is too slow */
if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
cleaned_count = 0;
}
rx_desc = next_rxd;
buffer_info = next_buffer;
}
rx_ring->next_to_clean = i;
cleaned_count = E1000_DESC_UNUSED(rx_ring);
if (cleaned_count)
adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
return cleaned;
}
/**
* e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
* @adapter: board private structure
**/
static boolean_t
#ifdef CONFIG_E1000_NAPI
e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int *work_done, int work_to_do)
#else
e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring)
#endif
{
union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
struct e1000_buffer *buffer_info, *next_buffer;
struct e1000_ps_page *ps_page;
struct e1000_ps_page_dma *ps_page_dma;
struct sk_buff *skb, *next_skb;
unsigned int i, j;
uint32_t length, staterr;
int cleaned_count = 0;
boolean_t cleaned = FALSE;
i = rx_ring->next_to_clean;
rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
buffer_info = &rx_ring->buffer_info[i];
while (staterr & E1000_RXD_STAT_DD) {
ps_page = &rx_ring->ps_page[i];
ps_page_dma = &rx_ring->ps_page_dma[i];
#ifdef CONFIG_E1000_NAPI
if (unlikely(*work_done >= work_to_do))
break;
(*work_done)++;
#endif
skb = buffer_info->skb;
if (++i == rx_ring->count) i = 0;
next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
next_buffer = &rx_ring->buffer_info[i];
next_skb = next_buffer->skb;
cleaned = TRUE;
cleaned_count++;
pci_unmap_single(pdev, buffer_info->dma,
buffer_info->length,
PCI_DMA_FROMDEVICE);
if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
E1000_DBG("%s: Packet Split buffers didn't pick up"
" the full packet\n", netdev->name);
dev_kfree_skb_irq(skb);
goto next_desc;
}
if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
dev_kfree_skb_irq(skb);
goto next_desc;
}
length = le16_to_cpu(rx_desc->wb.middle.length0);
if (unlikely(!length)) {
E1000_DBG("%s: Last part of the packet spanning"
" multiple descriptors\n", netdev->name);
dev_kfree_skb_irq(skb);
goto next_desc;
}
/* Good Receive */
skb_put(skb, length);
for (j = 0; j < adapter->rx_ps_pages; j++) {
if (!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
break;
pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
PAGE_SIZE, PCI_DMA_FROMDEVICE);
ps_page_dma->ps_page_dma[j] = 0;
skb_shinfo(skb)->frags[j].page =
ps_page->ps_page[j];
ps_page->ps_page[j] = NULL;
skb_shinfo(skb)->frags[j].page_offset = 0;
skb_shinfo(skb)->frags[j].size = length;
skb_shinfo(skb)->nr_frags++;
skb->len += length;
skb->data_len += length;
}
e1000_rx_checksum(adapter, staterr,
rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
skb->protocol = eth_type_trans(skb, netdev);
if (likely(rx_desc->wb.upper.header_status &
E1000_RXDPS_HDRSTAT_HDRSP))
adapter->rx_hdr_split++;
#ifdef CONFIG_E1000_NAPI
if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->wb.middle.vlan) &
E1000_RXD_SPC_VLAN_MASK);
} else {
netif_receive_skb(skb);
}
#else /* CONFIG_E1000_NAPI */
if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
vlan_hwaccel_rx(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->wb.middle.vlan) &
E1000_RXD_SPC_VLAN_MASK);
} else {
netif_rx(skb);
}
#endif /* CONFIG_E1000_NAPI */
netdev->last_rx = jiffies;
#ifdef CONFIG_E1000_MQ
rx_ring->rx_stats.packets++;
rx_ring->rx_stats.bytes += length;
#endif
next_desc:
rx_desc->wb.middle.status_error &= ~0xFF;
buffer_info->skb = NULL;
/* return some buffers to hardware, one at a time is too slow */
if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
cleaned_count = 0;
}
rx_desc = next_rxd;
buffer_info = next_buffer;
staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
}
rx_ring->next_to_clean = i;
cleaned_count = E1000_DESC_UNUSED(rx_ring);
if (cleaned_count)
adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
return cleaned;
}
/**
* e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
* @adapter: address of board private structure
**/
static void
e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int cleaned_count)
{
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
struct e1000_rx_desc *rx_desc;
struct e1000_buffer *buffer_info;
struct sk_buff *skb;
unsigned int i;
unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
i = rx_ring->next_to_use;
buffer_info = &rx_ring->buffer_info[i];
while (cleaned_count--) {
if (!(skb = buffer_info->skb))
skb = dev_alloc_skb(bufsz);
else {
skb_trim(skb, 0);
goto map_skb;
}
if (unlikely(!skb)) {
/* Better luck next round */
adapter->alloc_rx_buff_failed++;
break;
}
/* Fix for errata 23, can't cross 64kB boundary */
if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
struct sk_buff *oldskb = skb;
DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
"at %p\n", bufsz, skb->data);
/* Try again, without freeing the previous */
skb = dev_alloc_skb(bufsz);
/* Failed allocation, critical failure */
if (!skb) {
dev_kfree_skb(oldskb);
break;
}
if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
/* give up */
dev_kfree_skb(skb);
dev_kfree_skb(oldskb);
break; /* while !buffer_info->skb */
} else {
/* Use new allocation */
dev_kfree_skb(oldskb);
}
}
/* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
skb->dev = netdev;
buffer_info->skb = skb;
buffer_info->length = adapter->rx_buffer_len;
map_skb:
buffer_info->dma = pci_map_single(pdev,
skb->data,
adapter->rx_buffer_len,
PCI_DMA_FROMDEVICE);
/* Fix for errata 23, can't cross 64kB boundary */
if (!e1000_check_64k_bound(adapter,
(void *)(unsigned long)buffer_info->dma,
adapter->rx_buffer_len)) {
DPRINTK(RX_ERR, ERR,
"dma align check failed: %u bytes at %p\n",
adapter->rx_buffer_len,
(void *)(unsigned long)buffer_info->dma);
dev_kfree_skb(skb);
buffer_info->skb = NULL;
pci_unmap_single(pdev, buffer_info->dma,
adapter->rx_buffer_len,
PCI_DMA_FROMDEVICE);
break; /* while !buffer_info->skb */
}
rx_desc = E1000_RX_DESC(*rx_ring, i);
rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
if (unlikely(++i == rx_ring->count))
i = 0;
buffer_info = &rx_ring->buffer_info[i];
}
if (likely(rx_ring->next_to_use != i)) {
rx_ring->next_to_use = i;
if (unlikely(i-- == 0))
i = (rx_ring->count - 1);
/* 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();
writel(i, adapter->hw.hw_addr + rx_ring->rdt);
}
}
/**
* e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
* @adapter: address of board private structure
**/
static void
e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int cleaned_count)
{
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
union e1000_rx_desc_packet_split *rx_desc;
struct e1000_buffer *buffer_info;
struct e1000_ps_page *ps_page;
struct e1000_ps_page_dma *ps_page_dma;
struct sk_buff *skb;
unsigned int i, j;
i = rx_ring->next_to_use;
buffer_info = &rx_ring->buffer_info[i];
ps_page = &rx_ring->ps_page[i];
ps_page_dma = &rx_ring->ps_page_dma[i];
while (cleaned_count--) {
rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
for (j = 0; j < PS_PAGE_BUFFERS; j++) {
if (j < adapter->rx_ps_pages) {
if (likely(!ps_page->ps_page[j])) {
ps_page->ps_page[j] =
alloc_page(GFP_ATOMIC);
if (unlikely(!ps_page->ps_page[j])) {
adapter->alloc_rx_buff_failed++;
goto no_buffers;
}
ps_page_dma->ps_page_dma[j] =
pci_map_page(pdev,
ps_page->ps_page[j],
0, PAGE_SIZE,
PCI_DMA_FROMDEVICE);
}
/* Refresh the desc even if buffer_addrs didn't
* change because each write-back erases
* this info.
*/
rx_desc->read.buffer_addr[j+1] =
cpu_to_le64(ps_page_dma->ps_page_dma[j]);
} else
rx_desc->read.buffer_addr[j+1] = ~0;
}
skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
if (unlikely(!skb)) {
adapter->alloc_rx_buff_failed++;
break;
}
/* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
skb->dev = netdev;
buffer_info->skb = skb;
buffer_info->length = adapter->rx_ps_bsize0;
buffer_info->dma = pci_map_single(pdev, skb->data,
adapter->rx_ps_bsize0,
PCI_DMA_FROMDEVICE);
rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
if (unlikely(++i == rx_ring->count)) i = 0;
buffer_info = &rx_ring->buffer_info[i];
ps_page = &rx_ring->ps_page[i];
ps_page_dma = &rx_ring->ps_page_dma[i];
}
no_buffers:
if (likely(rx_ring->next_to_use != i)) {
rx_ring->next_to_use = i;
if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
/* 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();
/* Hardware increments by 16 bytes, but packet split
* descriptors are 32 bytes...so we increment tail
* twice as much.
*/
writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
}
}
/**
* e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
* @adapter:
**/
static void
e1000_smartspeed(struct e1000_adapter *adapter)
{
uint16_t phy_status;
uint16_t phy_ctrl;
if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
!(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
return;
if (adapter->smartspeed == 0) {
/* If Master/Slave config fault is asserted twice,
* we assume back-to-back */
e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
if (phy_ctrl & CR_1000T_MS_ENABLE) {
phy_ctrl &= ~CR_1000T_MS_ENABLE;
e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
phy_ctrl);
adapter->smartspeed++;
if (!e1000_phy_setup_autoneg(&adapter->hw) &&
!e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
&phy_ctrl)) {
phy_ctrl |= (MII_CR_AUTO_NEG_EN |
MII_CR_RESTART_AUTO_NEG);
e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
phy_ctrl);
}
}
return;
} else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
/* If still no link, perhaps using 2/3 pair cable */
e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
phy_ctrl |= CR_1000T_MS_ENABLE;
e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
if (!e1000_phy_setup_autoneg(&adapter->hw) &&
!e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
phy_ctrl |= (MII_CR_AUTO_NEG_EN |
MII_CR_RESTART_AUTO_NEG);
e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
}
}
/* Restart process after E1000_SMARTSPEED_MAX iterations */
if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
adapter->smartspeed = 0;
}
/**
* e1000_ioctl -
* @netdev:
* @ifreq:
* @cmd:
**/
static int
e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
switch (cmd) {
case SIOCGMIIPHY:
case SIOCGMIIREG:
case SIOCSMIIREG:
return e1000_mii_ioctl(netdev, ifr, cmd);
default:
return -EOPNOTSUPP;
}
}
/**
* e1000_mii_ioctl -
* @netdev:
* @ifreq:
* @cmd:
**/
static int
e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
struct mii_ioctl_data *data = if_mii(ifr);
int retval;
uint16_t mii_reg;
uint16_t spddplx;
unsigned long flags;
if (adapter->hw.media_type != e1000_media_type_copper)
return -EOPNOTSUPP;
switch (cmd) {
case SIOCGMIIPHY:
data->phy_id = adapter->hw.phy_addr;
break;
case SIOCGMIIREG:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
spin_lock_irqsave(&adapter->stats_lock, flags);
if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
&data->val_out)) {
spin_unlock_irqrestore(&adapter->stats_lock, flags);
return -EIO;
}
spin_unlock_irqrestore(&adapter->stats_lock, flags);
break;
case SIOCSMIIREG:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (data->reg_num & ~(0x1F))
return -EFAULT;
mii_reg = data->val_in;
spin_lock_irqsave(&adapter->stats_lock, flags);
if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
mii_reg)) {
spin_unlock_irqrestore(&adapter->stats_lock, flags);
return -EIO;
}
if (adapter->hw.phy_type == e1000_phy_m88) {
switch (data->reg_num) {
case PHY_CTRL:
if (mii_reg & MII_CR_POWER_DOWN)
break;
if (mii_reg & MII_CR_AUTO_NEG_EN) {
adapter->hw.autoneg = 1;
adapter->hw.autoneg_advertised = 0x2F;
} else {
if (mii_reg & 0x40)
spddplx = SPEED_1000;
else if (mii_reg & 0x2000)
spddplx = SPEED_100;
else
spddplx = SPEED_10;
spddplx += (mii_reg & 0x100)
? FULL_DUPLEX :
HALF_DUPLEX;
retval = e1000_set_spd_dplx(adapter,
spddplx);
if (retval) {
spin_unlock_irqrestore(
&adapter->stats_lock,
flags);
return retval;
}
}
if (netif_running(adapter->netdev)) {
e1000_down(adapter);
e1000_up(adapter);
} else
e1000_reset(adapter);
break;
case M88E1000_PHY_SPEC_CTRL:
case M88E1000_EXT_PHY_SPEC_CTRL:
if (e1000_phy_reset(&adapter->hw)) {
spin_unlock_irqrestore(
&adapter->stats_lock, flags);
return -EIO;
}
break;
}
} else {
switch (data->reg_num) {
case PHY_CTRL:
if (mii_reg & MII_CR_POWER_DOWN)
break;
if (netif_running(adapter->netdev)) {
e1000_down(adapter);
e1000_up(adapter);
} else
e1000_reset(adapter);
break;
}
}
spin_unlock_irqrestore(&adapter->stats_lock, flags);
break;
default:
return -EOPNOTSUPP;
}
return E1000_SUCCESS;
}
void
e1000_pci_set_mwi(struct e1000_hw *hw)
{
struct e1000_adapter *adapter = hw->back;
int ret_val = pci_set_mwi(adapter->pdev);
if (ret_val)
DPRINTK(PROBE, ERR, "Error in setting MWI\n");
}
void
e1000_pci_clear_mwi(struct e1000_hw *hw)
{
struct e1000_adapter *adapter = hw->back;
pci_clear_mwi(adapter->pdev);
}
void
e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
{
struct e1000_adapter *adapter = hw->back;
pci_read_config_word(adapter->pdev, reg, value);
}
void
e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
{
struct e1000_adapter *adapter = hw->back;
pci_write_config_word(adapter->pdev, reg, *value);
}
uint32_t
e1000_io_read(struct e1000_hw *hw, unsigned long port)
{
return inl(port);
}
void
e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
{
outl(value, port);
}
static void
e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
uint32_t ctrl, rctl;
e1000_irq_disable(adapter);
adapter->vlgrp = grp;
if (grp) {
/* enable VLAN tag insert/strip */
ctrl = E1000_READ_REG(&adapter->hw, CTRL);
ctrl |= E1000_CTRL_VME;
E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
/* enable VLAN receive filtering */
rctl = E1000_READ_REG(&adapter->hw, RCTL);
rctl |= E1000_RCTL_VFE;
rctl &= ~E1000_RCTL_CFIEN;
E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
e1000_update_mng_vlan(adapter);
} else {
/* disable VLAN tag insert/strip */
ctrl = E1000_READ_REG(&adapter->hw, CTRL);
ctrl &= ~E1000_CTRL_VME;
E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
/* disable VLAN filtering */
rctl = E1000_READ_REG(&adapter->hw, RCTL);
rctl &= ~E1000_RCTL_VFE;
E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
}
}
e1000_irq_enable(adapter);
}
static void
e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
uint32_t vfta, index;
if ((adapter->hw.mng_cookie.status &
E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
(vid == adapter->mng_vlan_id))
return;
/* add VID to filter table */
index = (vid >> 5) & 0x7F;
vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
vfta |= (1 << (vid & 0x1F));
e1000_write_vfta(&adapter->hw, index, vfta);
}
static void
e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
uint32_t vfta, index;
e1000_irq_disable(adapter);
if (adapter->vlgrp)
adapter->vlgrp->vlan_devices[vid] = NULL;
e1000_irq_enable(adapter);
if ((adapter->hw.mng_cookie.status &
E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
(vid == adapter->mng_vlan_id)) {
/* release control to f/w */
e1000_release_hw_control(adapter);
return;
}
/* remove VID from filter table */
index = (vid >> 5) & 0x7F;
vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
vfta &= ~(1 << (vid & 0x1F));
e1000_write_vfta(&adapter->hw, index, vfta);
}
static void
e1000_restore_vlan(struct e1000_adapter *adapter)
{
e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
if (adapter->vlgrp) {
uint16_t vid;
for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
if (!adapter->vlgrp->vlan_devices[vid])
continue;
e1000_vlan_rx_add_vid(adapter->netdev, vid);
}
}
}
int
e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
{
adapter->hw.autoneg = 0;
/* Fiber NICs only allow 1000 gbps Full duplex */
if ((adapter->hw.media_type == e1000_media_type_fiber) &&
spddplx != (SPEED_1000 + DUPLEX_FULL)) {
DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
return -EINVAL;
}
switch (spddplx) {
case SPEED_10 + DUPLEX_HALF:
adapter->hw.forced_speed_duplex = e1000_10_half;
break;
case SPEED_10 + DUPLEX_FULL:
adapter->hw.forced_speed_duplex = e1000_10_full;
break;
case SPEED_100 + DUPLEX_HALF:
adapter->hw.forced_speed_duplex = e1000_100_half;
break;
case SPEED_100 + DUPLEX_FULL:
adapter->hw.forced_speed_duplex = e1000_100_full;
break;
case SPEED_1000 + DUPLEX_FULL:
adapter->hw.autoneg = 1;
adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
break;
case SPEED_1000 + DUPLEX_HALF: /* not supported */
default:
DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
return -EINVAL;
}
return 0;
}
#ifdef CONFIG_PM
/* these functions save and restore 16 or 64 dwords (64-256 bytes) of config
* space versus the 64 bytes that pci_[save|restore]_state handle
*/
#define PCIE_CONFIG_SPACE_LEN 256
#define PCI_CONFIG_SPACE_LEN 64
static int
e1000_pci_save_state(struct e1000_adapter *adapter)
{
struct pci_dev *dev = adapter->pdev;
int size;
int i;
if (adapter->hw.mac_type >= e1000_82571)
size = PCIE_CONFIG_SPACE_LEN;
else
size = PCI_CONFIG_SPACE_LEN;
WARN_ON(adapter->config_space != NULL);
adapter->config_space = kmalloc(size, GFP_KERNEL);
if (!adapter->config_space) {
DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
return -ENOMEM;
}
for (i = 0; i < (size / 4); i++)
pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
return 0;
}
static void
e1000_pci_restore_state(struct e1000_adapter *adapter)
{
struct pci_dev *dev = adapter->pdev;
int size;
int i;
if (adapter->config_space == NULL)
return;
if (adapter->hw.mac_type >= e1000_82571)
size = PCIE_CONFIG_SPACE_LEN;
else
size = PCI_CONFIG_SPACE_LEN;
for (i = 0; i < (size / 4); i++)
pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
kfree(adapter->config_space);
adapter->config_space = NULL;
return;
}
#endif /* CONFIG_PM */
static int
e1000_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct e1000_adapter *adapter = netdev_priv(netdev);
uint32_t ctrl, ctrl_ext, rctl, manc, status;
uint32_t wufc = adapter->wol;
int retval = 0;
netif_device_detach(netdev);
if (netif_running(netdev))
e1000_down(adapter);
#ifdef CONFIG_PM
/* implement our own version of pci_save_state(pdev) because pci
* express adapters have larger 256 byte config spaces */
retval = e1000_pci_save_state(adapter);
if (retval)
return retval;
#endif
status = E1000_READ_REG(&adapter->hw, STATUS);
if (status & E1000_STATUS_LU)
wufc &= ~E1000_WUFC_LNKC;
if (wufc) {
e1000_setup_rctl(adapter);
e1000_set_multi(netdev);
/* turn on all-multi mode if wake on multicast is enabled */
if (adapter->wol & E1000_WUFC_MC) {
rctl = E1000_READ_REG(&adapter->hw, RCTL);
rctl |= E1000_RCTL_MPE;
E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
}
if (adapter->hw.mac_type >= e1000_82540) {
ctrl = E1000_READ_REG(&adapter->hw, CTRL);
/* advertise wake from D3Cold */
#define E1000_CTRL_ADVD3WUC 0x00100000
/* phy power management enable */
#define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
ctrl |= E1000_CTRL_ADVD3WUC |
E1000_CTRL_EN_PHY_PWR_MGMT;
E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
}
if (adapter->hw.media_type == e1000_media_type_fiber ||
adapter->hw.media_type == e1000_media_type_internal_serdes) {
/* keep the laser running in D3 */
ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
}
/* Allow time for pending master requests to run */
e1000_disable_pciex_master(&adapter->hw);
E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
retval = pci_enable_wake(pdev, PCI_D3hot, 1);
if (retval)
DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
retval = pci_enable_wake(pdev, PCI_D3cold, 1);
if (retval)
DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
} else {
E1000_WRITE_REG(&adapter->hw, WUC, 0);
E1000_WRITE_REG(&adapter->hw, WUFC, 0);
retval = pci_enable_wake(pdev, PCI_D3hot, 0);
if (retval)
DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
retval = pci_enable_wake(pdev, PCI_D3cold, 0); /* 4 == D3 cold */
if (retval)
DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
}
if (adapter->hw.mac_type >= e1000_82540 &&
adapter->hw.media_type == e1000_media_type_copper) {
manc = E1000_READ_REG(&adapter->hw, MANC);
if (manc & E1000_MANC_SMBUS_EN) {
manc |= E1000_MANC_ARP_EN;
E1000_WRITE_REG(&adapter->hw, MANC, manc);
retval = pci_enable_wake(pdev, PCI_D3hot, 1);
if (retval)
DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
retval = pci_enable_wake(pdev, PCI_D3cold, 1);
if (retval)
DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
}
}
/* Release control of h/w to f/w. If f/w is AMT enabled, this
* would have already happened in close and is redundant. */
e1000_release_hw_control(adapter);
pci_disable_device(pdev);
retval = pci_set_power_state(pdev, pci_choose_state(pdev, state));
if (retval)
DPRINTK(PROBE, ERR, "Error in setting power state\n");
return 0;
}
#ifdef CONFIG_PM
static int
e1000_resume(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct e1000_adapter *adapter = netdev_priv(netdev);
int retval;
uint32_t manc, ret_val;
retval = pci_set_power_state(pdev, PCI_D0);
if (retval)
DPRINTK(PROBE, ERR, "Error in setting power state\n");
e1000_pci_restore_state(adapter);
ret_val = pci_enable_device(pdev);
pci_set_master(pdev);
retval = pci_enable_wake(pdev, PCI_D3hot, 0);
if (retval)
DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
retval = pci_enable_wake(pdev, PCI_D3cold, 0);
if (retval)
DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
e1000_reset(adapter);
E1000_WRITE_REG(&adapter->hw, WUS, ~0);
if (netif_running(netdev))
e1000_up(adapter);
netif_device_attach(netdev);
if (adapter->hw.mac_type >= e1000_82540 &&
adapter->hw.media_type == e1000_media_type_copper) {
manc = E1000_READ_REG(&adapter->hw, MANC);
manc &= ~(E1000_MANC_ARP_EN);
E1000_WRITE_REG(&adapter->hw, MANC, manc);
}
/* If the controller is 82573 and f/w is AMT, do not set
* DRV_LOAD until the interface is up. For all other cases,
* let the f/w know that the h/w is now under the control
* of the driver. */
if (adapter->hw.mac_type != e1000_82573 ||
!e1000_check_mng_mode(&adapter->hw))
e1000_get_hw_control(adapter);
return 0;
}
#endif
#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
e1000_netpoll(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
disable_irq(adapter->pdev->irq);
e1000_intr(adapter->pdev->irq, netdev, NULL);
e1000_clean_tx_irq(adapter, adapter->tx_ring);
#ifndef CONFIG_E1000_NAPI
adapter->clean_rx(adapter, adapter->rx_ring);
#endif
enable_irq(adapter->pdev->irq);
}
#endif
/* e1000_main.c */
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