gpu: nvgpu: Align VA of compressible buffer

Ensure that the GPU VA for a buffer is aligned correctly if
compression is enabled.

Bug 1605769

Change-Id: I12566ddd554da7cc9fb41dd553576c534ac96ba8
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/725767
Reviewed-on: http://git-master/r/737529
Reviewed-by: Alexander Van Brunt <avanbrunt@nvidia.com>
Tested-by: Alexander Van Brunt <avanbrunt@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/mm_gk20a.c b/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
index 45f6fd64..fa84337b 100644
--- a/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
@@ -1378,6 +1378,11 @@ u64 gk20a_vm_map(struct vm_gk20a *vm,
 
         gk20a_get_comptags(d, dmabuf, &comptags);
 
+        /* ensure alignment to compression page size if compression enabled */
+        if (bfr.ctag_offset)
+                mapping_size = ALIGN(mapping_size,
+                                     g->ops.fb.compression_page_size(g));
+
         if (bfr.ctag_lines && !comptags.lines) {
                 /* allocate compression resources if needed */
                 err = gk20a_alloc_comptags(d, dmabuf, ctag_allocator,