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[PATCH] forcedeth: power management support

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Tobias Diedrich <ranma@tdiedrich.de> sayeth:

Vanilla forcedeth doesn't seem to support suspend and an ifdown/up-cycle is
needed to get it working again after suspend.  Francois Romieu's "Awfully
experimental" patch is working just fine for me (with message signalled
interrupts disabled) and has survived quite a few suspend/resume cycles.

So I'd very much like to see (at least partial, with msi disabled)
suspend support for forcedeth in mainline.

(Addresses http://bugzilla.kernel.org/show_bug.cgi?id=6398)

Cc: Francois Romieu <romieu@fr.zoreil.com>
Cc; Jeff Garzik <jeff@garzik.org>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Francois Romieu 2006-10-10 14:33:27 -07:00 committed by Jeff Garzik
parent 3c3070d713
commit a189317fa0
1 changed files with 46 additions and 1 deletions
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47
drivers/net/forcedeth.c
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@ -4603,6 +4603,50 @@ static void __devexit nv_remove(struct pci_dev *pci_dev)
pci_set_drvdata(pci_dev, NULL);
}
#ifdef CONFIG_PM
static int nv_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct fe_priv *np = netdev_priv(dev);
if (!netif_running(dev))
goto out;
netif_device_detach(dev);
// Gross.
nv_close(dev);
pci_save_state(pdev);
pci_enable_wake(pdev, pci_choose_state(pdev, state), np->wolenabled);
pci_set_power_state(pdev, pci_choose_state(pdev, state));
out:
return 0;
}
static int nv_resume(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
int rc = 0;
if (!netif_running(dev))
goto out;
netif_device_attach(dev);
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
pci_enable_wake(pdev, PCI_D0, 0);
rc = nv_open(dev);
out:
return rc;
}
#else
#define nv_suspend NULL
#define nv_resume NULL
#endif /* CONFIG_PM */
static struct pci_device_id pci_tbl[] = {
{ /* nForce Ethernet Controller */
PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_1),
@ -4704,9 +4748,10 @@ static struct pci_driver driver = {
.id_table = pci_tbl,
.probe = nv_probe,
.remove = __devexit_p(nv_remove),
.suspend = nv_suspend,
.resume = nv_resume,
};
static int __init init_nic(void)
{
printk(KERN_INFO "forcedeth.c: Reverse Engineered nForce ethernet driver. Version %s.\n", FORCEDETH_VERSION);