drm/radeon: fix asic initialization for virtualized environments

[cascardo/linux.git] / drivers / gpu / drm / radeon / radeon_device.c

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index d0826fb..21c44b2 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -630,6 +630,23 @@ void radeon_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
 /*
  * GPU helpers function.
  */
+
+/**
+ * radeon_device_is_virtual - check if we are running is a virtual environment
+ *
+ * Check if the asic has been passed through to a VM (all asics).
+ * Used at driver startup.
+ * Returns true if virtual or false if not.
+ */
+static bool radeon_device_is_virtual(void)
+{
+#ifdef CONFIG_X86
+       return boot_cpu_has(X86_FEATURE_HYPERVISOR);
+#else
+       return false;
+#endif
+}
+
 /**
  * radeon_card_posted - check if the hw has already been initialized
  *
@@ -643,6 +660,10 @@ bool radeon_card_posted(struct radeon_device *rdev)
 {
        uint32_t reg;
 
+       /* for pass through, always force asic_init */
+       if (radeon_device_is_virtual())
+               return false;
+
        /* required for EFI mode on macbook2,1 which uses an r5xx asic */
        if (efi_enabled(EFI_BOOT) &&
            (rdev->pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE) &&
@@ -1230,7 +1251,7 @@ static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
                printk(KERN_INFO "radeon: switched off\n");
                drm_kms_helper_poll_disable(dev);
                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
-               radeon_suspend_kms(dev, true, true);
+               radeon_suspend_kms(dev, true, true, false);
                dev->switch_power_state = DRM_SWITCH_POWER_OFF;
        }
 }
@@ -1555,7 +1576,8 @@ void radeon_device_fini(struct radeon_device *rdev)
  * Returns 0 for success or an error on failure.
  * Called at driver suspend.
  */
-int radeon_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon)
+int radeon_suspend_kms(struct drm_device *dev, bool suspend,
+                      bool fbcon, bool freeze)
 {
        struct radeon_device *rdev;
        struct drm_crtc *crtc;
@@ -1630,7 +1652,10 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon)
        radeon_agp_suspend(rdev);
 
        pci_save_state(dev->pdev);
-       if (suspend) {
+       if (freeze && rdev->family >= CHIP_CEDAR) {
+               rdev->asic->asic_reset(rdev, true);
+               pci_restore_state(dev->pdev);
+       } else if (suspend) {
                /* Shut down the device */
                pci_disable_device(dev->pdev);
                pci_set_power_state(dev->pdev, PCI_D3hot);