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e1000e: make ioport free 

This patch makes e1000e 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 11:57:02 +09:00 committed by Jeff Garzik
parent d03157babe
commit 6e4f6f6b40
2 changed files with 46 additions and 6 deletions
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4
drivers/net/e1000e/e1000.h
View File

@ -283,6 +283,10 @@ struct e1000_adapter {
unsigned long led_status;
unsigned int flags;
/* for ioport free */
int bars;
int need_ioport;
};
struct e1000_info {

48
drivers/net/e1000e/netdev.c
View File

@ -4002,7 +4002,11 @@ static int e1000_resume(struct pci_dev *pdev)
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
e1000e_disable_l1aspm(pdev);
err = 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 enable PCI device from suspend\n");
@ -4103,9 +4107,14 @@ static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
struct net_device *netdev = pci_get_drvdata(pdev);
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
int err;
e1000e_disable_l1aspm(pdev);
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;
@ -4183,6 +4192,21 @@ static void e1000_print_device_info(struct e1000_adapter *adapter)
(pba_num >> 8), (pba_num & 0xff));
}
/**
* e1000e_is_need_ioport - determine if an adapter needs ioport resources or not
* @pdev: PCI device information struct
*
* Returns true if an adapters needs ioport resources
**/
static int e1000e_is_need_ioport(struct pci_dev *pdev)
{
switch (pdev->device) {
/* Currently there are no adapters that need ioport resources */
default:
return false;
}
}
/**
* e1000_probe - Device Initialization Routine
* @pdev: PCI device information struct
@ -4208,9 +4232,19 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
int i, err, pci_using_dac;
u16 eeprom_data = 0;
u16 eeprom_apme_mask = E1000_EEPROM_APME;
int bars, need_ioport;
e1000e_disable_l1aspm(pdev);
err = pci_enable_device(pdev);
/* do not allocate ioport bars when not needed */
need_ioport = e1000e_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;
@ -4233,7 +4267,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
}
}
err = pci_request_regions(pdev, e1000e_driver_name);
err = pci_request_selected_regions(pdev, bars, e1000e_driver_name);
if (err)
goto err_pci_reg;
@ -4258,6 +4292,8 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
adapter->hw.adapter = adapter;
adapter->hw.mac.type = ei->mac;
adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
adapter->bars = bars;
adapter->need_ioport = need_ioport;
mmio_start = pci_resource_start(pdev, 0);
mmio_len = pci_resource_len(pdev, 0);
@ -4497,7 +4533,7 @@ err_sw_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);
@ -4545,7 +4581,7 @@ static void __devexit e1000_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);