From c1d9b32d8ee2e97e2867fa759eb84d436cca0311 Mon Sep 17 00:00:00 2001

From: Thomas Hellstrom <thellstrom@vmware.com>

Date: Thu, 25 Jun 2015 10:47:43 -0700

Subject: [PATCH 1/2] vmwgfx: Rework device initialization

This commit reworks device initialization so that we always enable the

FIFO at driver load, deferring SVGA enable until either first modeset

or fbdev enable.

This should always leave the fifo properly enabled for render- and

control nodes.

In addition,

*) We disable the use of VRAM when SVGA is not enabled.

*) We simplify PM support so that we only throw out resources on hibernate,

not on suspend, since the device keeps its state on suspend.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>

Reviewed-by: Sinclair Yeh <syeh@vmware.com>

---

 drivers/gpu/drm/vmwgfx/vmwgfx_context.c |   8 +-

 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c     | 337 ++++++++++++++++++--------------

 drivers/gpu/drm/vmwgfx/vmwgfx_drv.h     |  19 +-

 drivers/gpu/drm/vmwgfx/vmwgfx_fb.c      |   4 +

 drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c    |  12 +-

 drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c     |   1 +

 drivers/gpu/drm/vmwgfx/vmwgfx_mob.c     |   6 +-

 drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c    |   1 +

 drivers/gpu/drm/vmwgfx/vmwgfx_shader.c  |   4 +-

 drivers/gpu/drm/vmwgfx/vmwgfx_surface.c |  12 +-

 10 files changed, 230 insertions(+), 174 deletions(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_context.c b/drivers/gpu/drm/vmwgfx/vmwgfx_context.c

index 5ac92874404d..a8e370a55e90 100644

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_context.c

+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_context.c

@@ -140,7 +140,7 @@ static void vmw_hw_context_destroy(struct vmw_resource *res)

 	cmd->body.cid = cpu_to_le32(res->id);

 	vmw_fifo_commit(dev_priv, sizeof(*cmd));

-	vmw_3d_resource_dec(dev_priv, false);

+	vmw_fifo_resource_dec(dev_priv);

 }

 static int vmw_gb_context_init(struct vmw_private *dev_priv,

@@ -220,7 +220,7 @@ static int vmw_context_init(struct vmw_private *dev_priv,

 	cmd->body.cid = cpu_to_le32(res->id);

 	vmw_fifo_commit(dev_priv, sizeof(*cmd));

-	(void) vmw_3d_resource_inc(dev_priv, false);

+	vmw_fifo_resource_inc(dev_priv);

 	vmw_resource_activate(res, vmw_hw_context_destroy);

 	return 0;

@@ -281,7 +281,7 @@ static int vmw_gb_context_create(struct vmw_resource *res)

 	cmd->header.size = sizeof(cmd->body);

 	cmd->body.cid = res->id;

 	vmw_fifo_commit(dev_priv, sizeof(*cmd));

-	(void) vmw_3d_resource_inc(dev_priv, false);

+	vmw_fifo_resource_inc(dev_priv);

 	return 0;

@@ -414,7 +414,7 @@ static int vmw_gb_context_destroy(struct vmw_resource *res)

 	if (dev_priv->query_cid == res->id)

 		dev_priv->query_cid_valid = false;

 	vmw_resource_release_id(res);

-	vmw_3d_resource_dec(dev_priv, false);

+	vmw_fifo_resource_dec(dev_priv);

 	return 0;

 }

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

index 620bb5cf617c..a4766acd0ea2 100644

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

@@ -339,24 +339,47 @@ static int vmw_dummy_query_bo_create(struct vmw_private *dev_priv)

 	return ret;

 }

-static int vmw_request_device(struct vmw_private *dev_priv)

+/**

+ * vmw_request_device_late - Perform late device setup

+ *

+ * @dev_priv: Pointer to device private.

+ *

+ * This function performs setup of otables and enables large command

+ * buffer submission. These tasks are split out to a separate function

+ * because it reverts vmw_release_device_early and is intended to be used

+ * by an error path in the hibernation code.

+ */

+static int vmw_request_device_late(struct vmw_private *dev_priv)

 {

 	int ret;

-	ret = vmw_fifo_init(dev_priv, &dev_priv->fifo);

-	if (unlikely(ret != 0)) {

-		DRM_ERROR("Unable to initialize FIFO.\n");

-		return ret;

-	}

-	vmw_fence_fifo_up(dev_priv->fman);

 	if (dev_priv->has_mob) {

 		ret = vmw_otables_setup(dev_priv);

 		if (unlikely(ret != 0)) {

 			DRM_ERROR("Unable to initialize "

 				  "guest Memory OBjects.\n");

-			goto out_no_mob;

+			return ret;

 		}

 	}

+

+	return 0;

+}

+

+static int vmw_request_device(struct vmw_private *dev_priv)

+{

+	int ret;

+

+	ret = vmw_fifo_init(dev_priv, &dev_priv->fifo);

+	if (unlikely(ret != 0)) {

+		DRM_ERROR("Unable to initialize FIFO.\n");

+		return ret;

+	}

+	vmw_fence_fifo_up(dev_priv->fman);

+

+	ret = vmw_request_device_late(dev_priv);

+	if (ret)

+		goto out_no_mob;

+

 	ret = vmw_dummy_query_bo_create(dev_priv);

 	if (unlikely(ret != 0))

 		goto out_no_query_bo;

@@ -364,15 +387,25 @@ static int vmw_request_device(struct vmw_private *dev_priv)

 	return 0;

 out_no_query_bo:

-	if (dev_priv->has_mob)

+	if (dev_priv->has_mob) {

+		(void) ttm_bo_evict_mm(&dev_priv->bdev, VMW_PL_MOB);

 		vmw_otables_takedown(dev_priv);

+	}

 out_no_mob:

 	vmw_fence_fifo_down(dev_priv->fman);

 	vmw_fifo_release(dev_priv, &dev_priv->fifo);

 	return ret;

 }

-static void vmw_release_device(struct vmw_private *dev_priv)

+/**

+ * vmw_release_device_early - Early part of fifo takedown.

+ *

+ * @dev_priv: Pointer to device private struct.

+ *

+ * This is the first part of command submission takedown, to be called before

+ * buffer management is taken down.

+ */

+static void vmw_release_device_early(struct vmw_private *dev_priv)

 {

 	/*

 	 * Previous destructions should've released

@@ -382,64 +415,24 @@ static void vmw_release_device(struct vmw_private *dev_priv)

 	BUG_ON(dev_priv->pinned_bo != NULL);

 	ttm_bo_unref(&dev_priv->dummy_query_bo);

-	if (dev_priv->has_mob)

+	if (dev_priv->has_mob) {

+		ttm_bo_evict_mm(&dev_priv->bdev, VMW_PL_MOB);

 		vmw_otables_takedown(dev_priv);

-	vmw_fence_fifo_down(dev_priv->fman);

-	vmw_fifo_release(dev_priv, &dev_priv->fifo);

-}

-

-

-/**

- * Increase the 3d resource refcount.

- * If the count was prevously zero, initialize the fifo, switching to svga

- * mode. Note that the master holds a ref as well, and may request an

- * explicit switch to svga mode if fb is not running, using @unhide_svga.

- */

-int vmw_3d_resource_inc(struct vmw_private *dev_priv,

-			bool unhide_svga)

-{

-	int ret = 0;

-

-	mutex_lock(&dev_priv->release_mutex);

-	if (unlikely(dev_priv->num_3d_resources++ == 0)) {

-		ret = vmw_request_device(dev_priv);

-		if (unlikely(ret != 0))

-			--dev_priv->num_3d_resources;

-	} else if (unhide_svga) {

-		vmw_write(dev_priv, SVGA_REG_ENABLE,

-			  vmw_read(dev_priv, SVGA_REG_ENABLE) &

-			  ~SVGA_REG_ENABLE_HIDE);

 	}

-

-	mutex_unlock(&dev_priv->release_mutex);

-	return ret;

 }

 /**

- * Decrease the 3d resource refcount.

- * If the count reaches zero, disable the fifo, switching to vga mode.

- * Note that the master holds a refcount as well, and may request an

- * explicit switch to vga mode when it releases its refcount to account

- * for the situation of an X server vt switch to VGA with 3d resources

- * active.

+ * vmw_release_device_late - Late part of fifo takedown.

+ *

+ * @dev_priv: Pointer to device private struct.

+ *

+ * This is the last part of the command submission takedown, to be called when

+ * command submission is no longer needed. It may wait on pending fences.

  */

-void vmw_3d_resource_dec(struct vmw_private *dev_priv,

-			 bool hide_svga)

+static void vmw_release_device_late(struct vmw_private *dev_priv)

 {

-	int32_t n3d;

-

-	mutex_lock(&dev_priv->release_mutex);

-	if (unlikely(--dev_priv->num_3d_resources == 0))

-		vmw_release_device(dev_priv);

-	else if (hide_svga)

-		vmw_write(dev_priv, SVGA_REG_ENABLE,

-			  vmw_read(dev_priv, SVGA_REG_ENABLE) |

-			  SVGA_REG_ENABLE_HIDE);

-

-	n3d = (int32_t) dev_priv->num_3d_resources;

-	mutex_unlock(&dev_priv->release_mutex);

-

-	BUG_ON(n3d < 0);

+	vmw_fence_fifo_down(dev_priv->fman);

+	vmw_fifo_release(dev_priv, &dev_priv->fifo);

 }

 /**

@@ -603,6 +596,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)

 	spin_lock_init(&dev_priv->hw_lock);

 	spin_lock_init(&dev_priv->waiter_lock);

 	spin_lock_init(&dev_priv->cap_lock);

+	spin_lock_init(&dev_priv->svga_lock);

 	for (i = vmw_res_context; i < vmw_res_max; ++i) {

 		idr_init(&dev_priv->res_idr[i]);

@@ -714,17 +708,6 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)

 	dev_priv->active_master = &dev_priv->fbdev_master;

-	ret = ttm_bo_device_init(&dev_priv->bdev,

-				 dev_priv->bo_global_ref.ref.object,

-				 &vmw_bo_driver,

-				 dev->anon_inode->i_mapping,

-				 VMWGFX_FILE_PAGE_OFFSET,

-				 false);

-	if (unlikely(ret != 0)) {

-		DRM_ERROR("Failed initializing TTM buffer object driver.\n");

-		goto out_err1;

-	}

-

 	dev_priv->mmio_mtrr = arch_phys_wc_add(dev_priv->mmio_start,

 					       dev_priv->mmio_size);

@@ -787,13 +770,28 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)

 		goto out_no_fman;

 	}

+	ret = ttm_bo_device_init(&dev_priv->bdev,

+				 dev_priv->bo_global_ref.ref.object,

+				 &vmw_bo_driver,

+				 dev->anon_inode->i_mapping,

+				 VMWGFX_FILE_PAGE_OFFSET,

+				 false);

+	if (unlikely(ret != 0)) {

+		DRM_ERROR("Failed initializing TTM buffer object driver.\n");

+		goto out_no_bdev;

+	}

+	/*

+	 * Enable VRAM, but initially don't use it until SVGA is enabled and

+	 * unhidden.

+	 */

 	ret = ttm_bo_init_mm(&dev_priv->bdev, TTM_PL_VRAM,

 			     (dev_priv->vram_size >> PAGE_SHIFT));

 	if (unlikely(ret != 0)) {

 		DRM_ERROR("Failed initializing memory manager for VRAM.\n");

 		goto out_no_vram;

 	}

+	dev_priv->bdev.man[TTM_PL_VRAM].use_type = false;

 	dev_priv->has_gmr = true;

 	if (((dev_priv->capabilities & (SVGA_CAP_GMR | SVGA_CAP_GMR2)) == 0) ||

@@ -814,18 +812,18 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)

 		}

 	}

-	vmw_kms_save_vga(dev_priv);

-

-	/* Start kms and overlay systems, needs fifo. */

 	ret = vmw_kms_init(dev_priv);

 	if (unlikely(ret != 0))

 		goto out_no_kms;

 	vmw_overlay_init(dev_priv);

+	ret = vmw_request_device(dev_priv);

+	if (ret)

+		goto out_no_fifo;

+

 	if (dev_priv->enable_fb) {

-		ret = vmw_3d_resource_inc(dev_priv, true);

-		if (unlikely(ret != 0))

-			goto out_no_fifo;

+		vmw_fifo_resource_inc(dev_priv);

+		vmw_svga_enable(dev_priv);

 		vmw_fb_init(dev_priv);

 	}

@@ -838,13 +836,14 @@ out_no_fifo:

 	vmw_overlay_close(dev_priv);

 	vmw_kms_close(dev_priv);

 out_no_kms:

-	vmw_kms_restore_vga(dev_priv);

 	if (dev_priv->has_mob)

 		(void) ttm_bo_clean_mm(&dev_priv->bdev, VMW_PL_MOB);

 	if (dev_priv->has_gmr)

 		(void) ttm_bo_clean_mm(&dev_priv->bdev, VMW_PL_GMR);

 	(void)ttm_bo_clean_mm(&dev_priv->bdev, TTM_PL_VRAM);

 out_no_vram:

+	(void)ttm_bo_device_release(&dev_priv->bdev);

+out_no_bdev:

 	vmw_fence_manager_takedown(dev_priv->fman);

 out_no_fman:

 	if (dev_priv->capabilities & SVGA_CAP_IRQMASK)

@@ -860,8 +859,6 @@ out_err4:

 	iounmap(dev_priv->mmio_virt);

 out_err3:

 	arch_phys_wc_del(dev_priv->mmio_mtrr);

-	(void)ttm_bo_device_release(&dev_priv->bdev);

-out_err1:

 	vmw_ttm_global_release(dev_priv);

 out_err0:

 	for (i = vmw_res_context; i < vmw_res_max; ++i)

@@ -883,18 +880,22 @@ static int vmw_driver_unload(struct drm_device *dev)

 	vfree(dev_priv->ctx.cmd_bounce);

 	if (dev_priv->enable_fb) {

 		vmw_fb_close(dev_priv);

-		vmw_kms_restore_vga(dev_priv);

-		vmw_3d_resource_dec(dev_priv, false);

+		vmw_fifo_resource_dec(dev_priv);

+		vmw_svga_disable(dev_priv);

 	}

+

 	vmw_kms_close(dev_priv);

 	vmw_overlay_close(dev_priv);

-	if (dev_priv->has_mob)

-		(void) ttm_bo_clean_mm(&dev_priv->bdev, VMW_PL_MOB);

 	if (dev_priv->has_gmr)

 		(void)ttm_bo_clean_mm(&dev_priv->bdev, VMW_PL_GMR);

 	(void)ttm_bo_clean_mm(&dev_priv->bdev, TTM_PL_VRAM);

+	vmw_release_device_early(dev_priv);

+	if (dev_priv->has_mob)

+		(void) ttm_bo_clean_mm(&dev_priv->bdev, VMW_PL_MOB);

+	(void) ttm_bo_device_release(&dev_priv->bdev);

+	vmw_release_device_late(dev_priv);

 	vmw_fence_manager_takedown(dev_priv->fman);

 	if (dev_priv->capabilities & SVGA_CAP_IRQMASK)

 		drm_irq_uninstall(dev_priv->dev);

@@ -1148,27 +1149,13 @@ static int vmw_master_set(struct drm_device *dev,

 	struct vmw_master *vmaster = vmw_master(file_priv->master);

 	int ret = 0;

-	if (!dev_priv->enable_fb) {

-		ret = vmw_3d_resource_inc(dev_priv, true);

-		if (unlikely(ret != 0))

-			return ret;

-		vmw_kms_save_vga(dev_priv);

-		vmw_write(dev_priv, SVGA_REG_TRACES, 0);

-	}

-

 	if (active) {

 		BUG_ON(active != &dev_priv->fbdev_master);

 		ret = ttm_vt_lock(&active->lock, false, vmw_fp->tfile);

 		if (unlikely(ret != 0))

-			goto out_no_active_lock;

+			return ret;

 		ttm_lock_set_kill(&active->lock, true, SIGTERM);

-		ret = ttm_bo_evict_mm(&dev_priv->bdev, TTM_PL_VRAM);

-		if (unlikely(ret != 0)) {

-			DRM_ERROR("Unable to clean VRAM on "

-				  "master drop.\n");

-		}

-

 		dev_priv->active_master = NULL;

 	}

@@ -1182,14 +1169,6 @@ static int vmw_master_set(struct drm_device *dev,

 	dev_priv->active_master = vmaster;

 	return 0;

-

-out_no_active_lock:

-	if (!dev_priv->enable_fb) {

-		vmw_kms_restore_vga(dev_priv);

-		vmw_3d_resource_dec(dev_priv, true);

-		vmw_write(dev_priv, SVGA_REG_TRACES, 1);

-	}

-	return ret;

 }

 static void vmw_master_drop(struct drm_device *dev,

@@ -1214,16 +1193,9 @@ static void vmw_master_drop(struct drm_device *dev,

 	}

 	ttm_lock_set_kill(&vmaster->lock, false, SIGTERM);

-	vmw_execbuf_release_pinned_bo(dev_priv);

-	if (!dev_priv->enable_fb) {

-		ret = ttm_bo_evict_mm(&dev_priv->bdev, TTM_PL_VRAM);

-		if (unlikely(ret != 0))

-			DRM_ERROR("Unable to clean VRAM on master drop.\n");

-		vmw_kms_restore_vga(dev_priv);

-		vmw_3d_resource_dec(dev_priv, true);

-		vmw_write(dev_priv, SVGA_REG_TRACES, 1);

-	}

+	if (!dev_priv->enable_fb)

+		vmw_svga_disable(dev_priv);

 	dev_priv->active_master = &dev_priv->fbdev_master;

 	ttm_lock_set_kill(&dev_priv->fbdev_master.lock, false, SIGTERM);

@@ -1233,6 +1205,74 @@ static void vmw_master_drop(struct drm_device *dev,

 		vmw_fb_on(dev_priv);

 }

+/**

+ * __vmw_svga_enable - Enable SVGA mode, FIFO and use of VRAM.

+ *

+ * @dev_priv: Pointer to device private struct.

+ * Needs the reservation sem to be held in non-exclusive mode.

+ */

+void __vmw_svga_enable(struct vmw_private *dev_priv)

+{

+	spin_lock(&dev_priv->svga_lock);

+	if (!dev_priv->bdev.man[TTM_PL_VRAM].use_type) {

+		vmw_write(dev_priv, SVGA_REG_ENABLE, SVGA_REG_ENABLE);

+		dev_priv->bdev.man[TTM_PL_VRAM].use_type = true;

+	}

+	spin_unlock(&dev_priv->svga_lock);

+}

+

+/**

+ * vmw_svga_enable - Enable SVGA mode, FIFO and use of VRAM.

+ *

+ * @dev_priv: Pointer to device private struct.

+ */

+void vmw_svga_enable(struct vmw_private *dev_priv)

+{

+	ttm_read_lock(&dev_priv->reservation_sem, false);

+	__vmw_svga_enable(dev_priv);

+	ttm_read_unlock(&dev_priv->reservation_sem);

+}

+

+/**

+ * __vmw_svga_disable - Disable SVGA mode and use of VRAM.

+ *

+ * @dev_priv: Pointer to device private struct.

+ * Needs the reservation sem to be held in exclusive mode.

+ * Will not empty VRAM. VRAM must be emptied by caller.

+ */

+void __vmw_svga_disable(struct vmw_private *dev_priv)

+{

+	spin_lock(&dev_priv->svga_lock);

+	if (dev_priv->bdev.man[TTM_PL_VRAM].use_type) {

+		dev_priv->bdev.man[TTM_PL_VRAM].use_type = false;

+		vmw_write(dev_priv, SVGA_REG_ENABLE,

+			  SVGA_REG_ENABLE_ENABLE_HIDE);

+	}

+	spin_unlock(&dev_priv->svga_lock);

+}

+

+/**

+ * vmw_svga_disable - Disable SVGA_MODE, and use of VRAM. Keep the fifo

+ * running.

+ *

+ * @dev_priv: Pointer to device private struct.

+ * Will empty VRAM.

+ */

+void vmw_svga_disable(struct vmw_private *dev_priv)

+{

+	ttm_write_lock(&dev_priv->reservation_sem, false);

+	spin_lock(&dev_priv->svga_lock);

+	if (dev_priv->bdev.man[TTM_PL_VRAM].use_type) {

+		dev_priv->bdev.man[TTM_PL_VRAM].use_type = false;

+		vmw_write(dev_priv, SVGA_REG_ENABLE,

+			  SVGA_REG_ENABLE_ENABLE_HIDE);

+		spin_unlock(&dev_priv->svga_lock);

+		if (ttm_bo_evict_mm(&dev_priv->bdev, TTM_PL_VRAM))

+			DRM_ERROR("Failed evicting VRAM buffers.\n");

+	} else

+		spin_unlock(&dev_priv->svga_lock);

+	ttm_write_unlock(&dev_priv->reservation_sem);

+}

 static void vmw_remove(struct pci_dev *pdev)

 {

@@ -1250,21 +1290,21 @@ static int vmwgfx_pm_notifier(struct notifier_block *nb, unsigned long val,

 	switch (val) {

 	case PM_HIBERNATION_PREPARE:

-	case PM_SUSPEND_PREPARE:

 		ttm_suspend_lock(&dev_priv->reservation_sem);

-		/**

+		/*

 		 * This empties VRAM and unbinds all GMR bindings.

 		 * Buffer contents is moved to swappable memory.

 		 */

 		vmw_execbuf_release_pinned_bo(dev_priv);

 		vmw_resource_evict_all(dev_priv);

+		vmw_release_device_early(dev_priv);

 		ttm_bo_swapout_all(&dev_priv->bdev);

-

+		vmw_fence_fifo_down(dev_priv->fman);

 		break;

 	case PM_POST_HIBERNATION:

-	case PM_POST_SUSPEND:

 	case PM_POST_RESTORE:

+		vmw_fence_fifo_up(dev_priv->fman);

 		ttm_suspend_unlock(&dev_priv->reservation_sem);

 		break;

@@ -1276,20 +1316,13 @@ static int vmwgfx_pm_notifier(struct notifier_block *nb, unsigned long val,

 	return 0;

 }

-/**

- * These might not be needed with the virtual SVGA device.

- */

-

 static int vmw_pci_suspend(struct pci_dev *pdev, pm_message_t state)

 {

 	struct drm_device *dev = pci_get_drvdata(pdev);

 	struct vmw_private *dev_priv = vmw_priv(dev);

-	if (dev_priv->num_3d_resources != 0) {

-		DRM_INFO("Can't suspend or hibernate "

-			 "while 3D resources are active.\n");

+	if (dev_priv->refuse_hibernation)

 		return -EBUSY;

-	}

 	pci_save_state(pdev);

 	pci_disable_device(pdev);

@@ -1321,56 +1354,62 @@ static int vmw_pm_resume(struct device *kdev)

 	return vmw_pci_resume(pdev);

 }

-static int vmw_pm_prepare(struct device *kdev)

+static int vmw_pm_freeze(struct device *kdev)

 {

 	struct pci_dev *pdev = to_pci_dev(kdev);

 	struct drm_device *dev = pci_get_drvdata(pdev);

 	struct vmw_private *dev_priv = vmw_priv(dev);

-	/**

-	 * Release 3d reference held by fbdev and potentially

-	 * stop fifo.

-	 */

 	dev_priv->suspended = true;

 	if (dev_priv->enable_fb)

-			vmw_3d_resource_dec(dev_priv, true);

-

-	if (dev_priv->num_3d_resources != 0) {

-

-		DRM_INFO("Can't suspend or hibernate "

-			 "while 3D resources are active.\n");

+		vmw_fifo_resource_dec(dev_priv);

+	if (atomic_read(&dev_priv->num_fifo_resources) != 0) {

+		DRM_ERROR("Can't hibernate while 3D resources are active.\n");

 		if (dev_priv->enable_fb)

-			vmw_3d_resource_inc(dev_priv, true);

+			vmw_fifo_resource_inc(dev_priv);

+		WARN_ON(vmw_request_device_late(dev_priv));

 		dev_priv->suspended = false;

 		return -EBUSY;

 	}

+	if (dev_priv->enable_fb)

+		__vmw_svga_disable(dev_priv);

+	

+	vmw_release_device_late(dev_priv);

+

 	return 0;

 }

-static void vmw_pm_complete(struct device *kdev)

+static int vmw_pm_restore(struct device *kdev)

 {

 	struct pci_dev *pdev = to_pci_dev(kdev);

 	struct drm_device *dev = pci_get_drvdata(pdev);

 	struct vmw_private *dev_priv = vmw_priv(dev);

+	int ret;

 	vmw_write(dev_priv, SVGA_REG_ID, SVGA_ID_2);

 	(void) vmw_read(dev_priv, SVGA_REG_ID);

-	/**

-	 * Reclaim 3d reference held by fbdev and potentially

-	 * start fifo.

-	 */

 	if (dev_priv->enable_fb)

-			vmw_3d_resource_inc(dev_priv, false);

+		vmw_fifo_resource_inc(dev_priv);

+

+	ret = vmw_request_device(dev_priv);

+	if (ret)

+		return ret;

+

+	if (dev_priv->enable_fb)

+		__vmw_svga_enable(dev_priv);

 	dev_priv->suspended = false;

+

+	return 0;

 }

 static const struct dev_pm_ops vmw_pm_ops = {

-	.prepare = vmw_pm_prepare,

-	.complete = vmw_pm_complete,

+	.freeze = vmw_pm_freeze,

+	.thaw = vmw_pm_restore,

+	.restore = vmw_pm_restore,

 	.suspend = vmw_pm_suspend,

 	.resume = vmw_pm_resume,

 };

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

index d26a6daa9719..a5f221eaf076 100644

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

@@ -484,6 +484,7 @@ struct vmw_private {

 	bool stealth;

 	bool enable_fb;

+	spinlock_t svga_lock;

 	/**

 	 * Master management.

@@ -493,9 +494,10 @@ struct vmw_private {

 	struct vmw_master fbdev_master;

 	struct notifier_block pm_nb;

 	bool suspended;

+	bool refuse_hibernation;

 	struct mutex release_mutex;

-	uint32_t num_3d_resources;

+	atomic_t num_fifo_resources;

 	/*

 	 * Replace this with an rwsem as soon as we have down_xx_interruptible()

@@ -587,8 +589,9 @@ static inline uint32_t vmw_read(struct vmw_private *dev_priv,

 	return val;

 }

-int vmw_3d_resource_inc(struct vmw_private *dev_priv, bool unhide_svga);

-void vmw_3d_resource_dec(struct vmw_private *dev_priv, bool hide_svga);

+extern void vmw_svga_enable(struct vmw_private *dev_priv);

+extern void vmw_svga_disable(struct vmw_private *dev_priv);

+

 /**

  * GMR utilities - vmwgfx_gmr.c

@@ -1116,4 +1119,14 @@ static inline struct ttm_mem_global *vmw_mem_glob(struct vmw_private *dev_priv)

 {

 	return (struct ttm_mem_global *) dev_priv->mem_global_ref.object;

 }

+

+static inline void vmw_fifo_resource_inc(struct vmw_private *dev_priv)

+{

+	atomic_inc(&dev_priv->num_fifo_resources);

+}

+

+static inline void vmw_fifo_resource_dec(struct vmw_private *dev_priv)

+{

+	atomic_dec(&dev_priv->num_fifo_resources);

+}

 #endif

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c

index 0a474f391fad..0e062613a7db 100644

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c

+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c

@@ -596,7 +596,10 @@ int vmw_fb_off(struct vmw_private *vmw_priv)

 	info = vmw_priv->fb_info;

 	par = info->par;

+	if (!par->bo_ptr)

+		return 0;

+	vmw_kms_save_vga(vmw_priv);

 	spin_lock_irqsave(&par->dirty.lock, flags);

 	par->dirty.active = false;

 	spin_unlock_irqrestore(&par->dirty.lock, flags);

@@ -648,6 +651,7 @@ int vmw_fb_on(struct vmw_private *vmw_priv)

 	spin_lock_irqsave(&par->dirty.lock, flags);

 	par->dirty.active = true;

 	spin_unlock_irqrestore(&par->dirty.lock, flags);

+	vmw_kms_restore_vga(vmw_priv);

 err_no_buffer:

 	vmw_fb_set_par(info);

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c

index 39f2b03888e7..cd5d9f3fe0e0 100644

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c

+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c

@@ -98,7 +98,6 @@ int vmw_fifo_init(struct vmw_private *dev_priv, struct vmw_fifo_state *fifo)

 	__le32 __iomem *fifo_mem = dev_priv->mmio_virt;