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igb: make ioport free 

This patch makes igb driver ioport-free.
This corrects behavior in probe function so as not to request ioport
resources as long as they are not really needed.

Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Taku Izumi 2008-06-20 12:10:30 +09:00 committed by Jeff Garzik
parent 6e4f6f6b40
commit 42bfd33ab7
2 changed files with 45 additions and 6 deletions
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4
drivers/net/igb/igb.h
View File

@ -271,6 +271,10 @@ struct igb_adapter {
unsigned int msi_enabled;
u32 eeprom_wol;
/* for ioport free */
int bars;
int need_ioport;
};
enum e1000_state_t {

43
drivers/net/igb/igb_main.c
View File

@ -819,6 +819,21 @@ void igb_reset(struct igb_adapter *adapter)
adapter->hw.phy.ops.get_phy_info(&adapter->hw);
}
/**
* igb_is_need_ioport - determine if an adapter needs ioport resources or not
* @pdev: PCI device information struct
*
* Returns true if an adapter needs ioport resources
**/
static int igb_is_need_ioport(struct pci_dev *pdev)
{
switch (pdev->device) {
/* Currently there are no adapters that need ioport resources */
default:
return false;
}
}
/**
* igb_probe - Device Initialization Routine
* @pdev: PCI device information struct
@ -843,8 +858,17 @@ static int __devinit igb_probe(struct pci_dev *pdev,
u16 eeprom_data = 0;
u16 eeprom_apme_mask = IGB_EEPROM_APME;
u32 part_num;
int bars, need_ioport;
/* do not allocate ioport bars when not needed */
need_ioport = igb_is_need_ioport(pdev);
if (need_ioport) {
bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
err = pci_enable_device(pdev);
} else {
bars = pci_select_bars(pdev, IORESOURCE_MEM);
err = pci_enable_device_mem(pdev);
}
if (err)
return err;
@ -866,7 +890,7 @@ static int __devinit igb_probe(struct pci_dev *pdev,
}
}
err = pci_request_regions(pdev, igb_driver_name);
err = pci_request_selected_regions(pdev, bars, igb_driver_name);
if (err)
goto err_pci_reg;
@ -887,6 +911,8 @@ static int __devinit igb_probe(struct pci_dev *pdev,
hw = &adapter->hw;
hw->back = adapter;
adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE;
adapter->bars = bars;
adapter->need_ioport = need_ioport;
mmio_start = pci_resource_start(pdev, 0);
mmio_len = pci_resource_len(pdev, 0);
@ -1127,7 +1153,7 @@ err_hw_init:
err_ioremap:
free_netdev(netdev);
err_alloc_etherdev:
pci_release_regions(pdev);
pci_release_selected_regions(pdev, bars);
err_pci_reg:
err_dma:
pci_disable_device(pdev);
@ -1174,7 +1200,7 @@ static void __devexit igb_remove(struct pci_dev *pdev)
iounmap(adapter->hw.hw_addr);
if (adapter->hw.flash_address)
iounmap(adapter->hw.flash_address);
pci_release_regions(pdev);
pci_release_selected_regions(pdev, adapter->bars);
free_netdev(netdev);
@ -3975,7 +4001,11 @@ static int igb_resume(struct pci_dev *pdev)
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
if (adapter->need_ioport)
err = pci_enable_device(pdev);
else
err = pci_enable_device_mem(pdev);
if (err) {
dev_err(&pdev->dev,
"igb: Cannot enable PCI device from suspend\n");
@ -4078,8 +4108,13 @@ static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev)
struct net_device *netdev = pci_get_drvdata(pdev);
struct igb_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
int err;
if (pci_enable_device(pdev)) {
if (adapter->need_ioport)
err = pci_enable_device(pdev);
else
err = pci_enable_device_mem(pdev);
if (err) {
dev_err(&pdev->dev,
"Cannot re-enable PCI device after reset.\n");
return PCI_ERS_RESULT_DISCONNECT;