[PATCH 1/2] drm/vmwgfx: Fix setting of dma masks

From: Thomas Hellstrom <thellstrom@vmware.com>
To: dri-devel@lists.freedesktop.org,
	linux-graphics-maintainer@vmware.com, drawat@vmware.com
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Subject: [PATCH 1/2] drm/vmwgfx: Fix setting of dma masks
Date: Tue, 29 Jan 2019 14:35:34 +0100	[thread overview]
Message-ID: <20190129133535.3705-1-thellstrom@vmware.com> (raw)

Previously we set only the dma mask and not the coherent mask. Fix that.
Also, for clarity, make sure both are initially set to 64 bits.

Fixes: 0d00c488f3de: ("drm/vmwgfx: Fix the driver for large dma addresses")
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 3e2bcff34032..ae9df4432bfc 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -600,13 +600,16 @@ static int vmw_dma_select_mode(struct vmw_private *dev_priv)
 static int vmw_dma_masks(struct vmw_private *dev_priv)
 {
 	struct drm_device *dev = dev_priv->dev;
+	int ret = 0;
 
-	if (intel_iommu_enabled &&
+	ret = dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64));
+	if (dev_priv->map_mode != vmw_dma_phys &&
 	    (sizeof(unsigned long) == 4 || vmw_restrict_dma_mask)) {
 		DRM_INFO("Restricting DMA addresses to 44 bits.\n");
-		return dma_set_mask(dev->dev, DMA_BIT_MASK(44));
+		return dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(44));
 	}
-	return 0;
+
+	return ret;
 }
 
 static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
-- 
2.19.0.rc1

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