gpu: nvgpu: Enable IO coherency on GV100

This reverts commit 848af2ce6de6140323a6ffe3075bf8021e119434.

This is a revert of a revert, etc, etc. It re-enables IO coherence again.

JIRA EVLR-2333

Change-Id: Ibf97dce2f892e48a1200a06cd38a1c5d9603be04
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1669722
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 8 insertions, 9 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/pci.c b/drivers/gpu/nvgpu/common/linux/pci.c
index 6ebe8dda..973da9ca 100644
--- a/drivers/gpu/nvgpu/common/linux/pci.c
+++ b/drivers/gpu/nvgpu/common/linux/pci.c
@@ -17,13 +17,13 @@
 #include <linux/pci.h>
 #include <linux/interrupt.h>
 #include <linux/pm_runtime.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
 
 #include <nvgpu/nvgpu_common.h>
 #include <nvgpu/kmem.h>
 #include <nvgpu/enabled.h>
 #include <nvgpu/nvlink.h>
-#include <linux/of_platform.h>
-#include <linux/of_address.h>
 
 #include "gk20a/gk20a.h"
 #include "clk/clk.h"
@@ -566,6 +566,12 @@ static int nvgpu_pci_probe(struct pci_dev *pdev,
         platform->g = g;
         l->dev = &pdev->dev;
 
+        np = nvgpu_get_node(g);
+        if (of_dma_is_coherent(np)) {
+                __nvgpu_set_enabled(g, NVGPU_USE_COHERENT_SYSMEM, true);
+                __nvgpu_set_enabled(g, NVGPU_SUPPORT_IO_COHERENCE, true);
+        }
+
         err = pci_enable_device(pdev);
         if (err)
                 return err;
@@ -644,13 +650,6 @@ static int nvgpu_pci_probe(struct pci_dev *pdev,
 
         g->mm.has_physical_mode = false;
 
-        np = nvgpu_get_node(g);
-
-        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;
 }