drm/vmwgfx: Implement basic pm operations.
Thomas Hellstrom [Wed, 13 Jan 2010 21:28:43 +0000 (22:28 +0100)]
Currently we really only support S3, since the device doesn't support
saving of the 3D state.

On S3/S4, move all buffer objects to swappable memory and take down
GMR bindings. We need to do that from a PM notifier since we can't
do persistant memory allocations from the standard PM callbacks.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

index 70e4f5f..dedd121 100644 (file)
@@ -147,6 +147,8 @@ static char *vmw_devname = "vmwgfx";
 
 static int vmw_probe(struct pci_dev *, const struct pci_device_id *);
 static void vmw_master_init(struct vmw_master *);
+static int vmwgfx_pm_notifier(struct notifier_block *nb, unsigned long val,
+                             void *ptr);
 
 static void vmw_print_capabilities(uint32_t capabilities)
 {
@@ -352,6 +354,9 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
                vmw_fb_init(dev_priv);
        }
 
+       dev_priv->pm_nb.notifier_call = vmwgfx_pm_notifier;
+       register_pm_notifier(&dev_priv->pm_nb);
+
        return 0;
 
 out_no_device:
@@ -386,6 +391,8 @@ static int vmw_driver_unload(struct drm_device *dev)
 
        DRM_INFO(VMWGFX_DRIVER_NAME " unload.\n");
 
+       unregister_pm_notifier(&dev_priv->pm_nb);
+
        if (!dev_priv->stealth) {
                vmw_fb_close(dev_priv);
                vmw_kms_close(dev_priv);
@@ -651,6 +658,57 @@ static void vmw_remove(struct pci_dev *pdev)
        drm_put_dev(dev);
 }
 
+static int vmwgfx_pm_notifier(struct notifier_block *nb, unsigned long val,
+                             void *ptr)
+{
+       struct vmw_private *dev_priv =
+               container_of(nb, struct vmw_private, pm_nb);
+       struct vmw_master *vmaster = dev_priv->active_master;
+
+       switch (val) {
+       case PM_HIBERNATION_PREPARE:
+       case PM_SUSPEND_PREPARE:
+               ttm_suspend_lock(&vmaster->lock);
+
+               /**
+                * This empties VRAM and unbinds all GMR bindings.
+                * Buffer contents is moved to swappable memory.
+                */
+               ttm_bo_swapout_all(&dev_priv->bdev);
+               break;
+       case PM_POST_HIBERNATION:
+       case PM_POST_SUSPEND:
+               ttm_suspend_unlock(&vmaster->lock);
+               break;
+       case PM_RESTORE_PREPARE:
+               break;
+       case PM_POST_RESTORE:
+               break;
+       default:
+               break;
+       }
+       return 0;
+}
+
+/**
+ * These might not be needed with the virtual SVGA device.
+ */
+
+int vmw_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+       pci_save_state(pdev);
+       pci_disable_device(pdev);
+       pci_set_power_state(pdev, PCI_D3hot);
+       return 0;
+}
+
+int vmw_pci_resume(struct pci_dev *pdev)
+{
+       pci_set_power_state(pdev, PCI_D0);
+       pci_restore_state(pdev);
+       return pci_enable_device(pdev);
+}
+
 static struct drm_driver driver = {
        .driver_features = DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED |
        DRIVER_MODESET,
@@ -690,7 +748,9 @@ static struct drm_driver driver = {
                       .name = VMWGFX_DRIVER_NAME,
                       .id_table = vmw_pci_id_list,
                       .probe = vmw_probe,
-                      .remove = vmw_remove
+                      .remove = vmw_remove,
+                      .suspend = vmw_pci_suspend,
+                      .resume = vmw_pci_resume
                       },
        .name = VMWGFX_DRIVER_NAME,
        .desc = VMWGFX_DRIVER_DESC,
index 4c9d6b2..7532b9b 100644 (file)
@@ -32,6 +32,7 @@
 #include "drmP.h"
 #include "vmwgfx_drm.h"
 #include "drm_hashtab.h"
+#include "linux/suspend.h"
 #include "ttm/ttm_bo_driver.h"
 #include "ttm/ttm_object.h"
 #include "ttm/ttm_lock.h"
@@ -258,6 +259,7 @@ struct vmw_private {
 
        struct vmw_master *active_master;
        struct vmw_master fbdev_master;
+       struct notifier_block pm_nb;
 };
 
 static inline struct vmw_private *vmw_priv(struct drm_device *dev)