gpu: nvgpu: rename ops.mm.get_physical_addr_bits

Rename get_physical_addr_bits and related functions to something that
more clearly conveys what they are doing. The basic idea of these
functions is to translate from a physical GPU address to a IOMMU GPU
address. To do that a particular bit (that varies from chip to chip)
is added to the physical address.

JIRA NVGPU-68

Change-Id: I536cc595c4397aad69a24f740bc74db03f52bc0a
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1542966
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/mm/nvgpu_mem.c b/drivers/gpu/nvgpu/common/mm/nvgpu_mem.c
index 52d20883..faee482d 100644
--- a/drivers/gpu/nvgpu/common/mm/nvgpu_mem.c
+++ b/drivers/gpu/nvgpu/common/mm/nvgpu_mem.c
@@ -22,6 +22,7 @@
 
 #include <nvgpu/kmem.h>
 #include <nvgpu/nvgpu_mem.h>
+#include <nvgpu/dma.h>
 
 #include "gk20a/gk20a.h"
 
@@ -56,3 +57,14 @@ void nvgpu_sgt_free(struct nvgpu_sgt *sgt, struct gk20a *g)
         if (sgt && sgt->ops->sgt_free)
                 sgt->ops->sgt_free(g, sgt);
 }
+
+u64 nvgpu_mem_iommu_translate(struct gk20a *g, u64 phys)
+{
+        /* ensure it is not vidmem allocation */
+        WARN_ON(is_vidmem_page_alloc(phys));
+
+        if (nvgpu_iommuable(g) && g->ops.mm.get_iommu_bit)
+                return phys | 1ULL << g->ops.mm.get_iommu_bit(g);
+
+        return phys;
+}