gpu: nvgpu: SMMU bypass

Improve GMMU mapping code to cope with discontiguous buffers.

Add debugfs entry that allows bypassing SMMU and disabling big pages.

Bug 1605769

Change-Id: I14d32c62293a16ff8c7195377c75a85fa8061083
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/717503
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/737533
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, 2 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index 7e919e2e..defc5904 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -452,6 +452,8 @@ struct gk20a {
         struct dentry *debugfs_ltc_enabled;
         struct dentry *debugfs_timeouts_enabled;
         struct dentry *debugfs_gr_idle_timeout_default;
+        struct dentry *debugfs_bypass_smmu;
+        struct dentry *debugfs_disable_bigpage;
 #endif
         struct gk20a_ctxsw_ucode_info ctxsw_ucode_info;