gpu: nvgpu: enable IO coherence characteristics for dGPUs

Enable NVGPU_SUPPORT_IO_COHERENCE characteristics for dGPUs which support
DMA_COHERENCE e.g. GV100

Bug 200383034

Change-Id: If12d2ef6c642f7c4cce83dbf05f492100ee1c7e0
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1644277
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/pci.c b/drivers/gpu/nvgpu/common/linux/pci.c
index 905a3d39..6ebe8dda 100644
--- a/drivers/gpu/nvgpu/common/linux/pci.c
+++ b/drivers/gpu/nvgpu/common/linux/pci.c
@@ -646,8 +646,10 @@ static int nvgpu_pci_probe(struct pci_dev *pdev,
 
         np = nvgpu_get_node(g);
 
-        if (of_dma_is_coherent(np))
+        if (of_dma_is_coherent(np)) {
                 __nvgpu_set_enabled(g, NVGPU_DMA_COHERENT, true);
+                __nvgpu_set_enabled(g, NVGPU_SUPPORT_IO_COHERENCE, true);
+        }
 
         return 0;
 }