[AGPGART] Suspend/Resume support for nVidia nForce AGP.

Based on a patch from the Ubuntu kernel.

Signed-off-by: Ben Collins <bcollins@ubuntu.com>
Signed-off-by: Dave Jones <davej@redhat.com>

diff --git a/drivers/char/agp/nvidia-agp.c b/drivers/char/agp/nvidia-agp.c
index 4c67135..b3a53e7 100644 (file)
--- a/drivers/char/agp/nvidia-agp.c
+++ b/drivers/char/agp/nvidia-agp.c
@@ -376,6 +376,31 @@ static void __devexit agp_nvidia_remove(struct pci_dev *pdev)
        agp_put_bridge(bridge);
 }
 
+#ifdef CONFIG_PM
+static int agp_nvidia_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+       pci_save_state (pdev);
+       pci_set_power_state (pdev, 3);
+
+       return 0;
+}
+
+static int agp_nvidia_resume(struct pci_dev *pdev)
+{
+       struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
+
+       /* set power state 0 and restore PCI space */
+       pci_set_power_state (pdev, 0);
+       pci_restore_state(pdev);
+
+       /* reconfigure AGP hardware again */
+       nvidia_configure();
+
+       return 0;
+}
+#endif
+
+
 static struct pci_device_id agp_nvidia_pci_table[] = {
        {
        .class          = (PCI_CLASS_BRIDGE_HOST << 8),
@@ -403,6 +428,10 @@ static struct pci_driver agp_nvidia_pci_driver = {
        .id_table       = agp_nvidia_pci_table,
        .probe          = agp_nvidia_probe,
        .remove         = agp_nvidia_remove,
+#ifdef CONFIG_PM
+       .suspend        = agp_nvidia_suspend,
+       .resume         = agp_nvidia_resume,
+#endif
 };
 
 static int __init agp_nvidia_init(void)