gpu: nvgpu: Add gk20a_gmmu_fixed_map() function

Add a function to allow the kernel to do fixed mappings. Necessary
for the semaphore functionality since there needs to be a common
address in each VM for the semaphores.

Bug 1732449
JIRA DNVGPU-12

Change-Id: I2b451db2d3cb3c003d951f7b0ffc87f6c91db7dc
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1133789
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/mm_gk20a.h b/drivers/gpu/nvgpu/gk20a/mm_gk20a.h
index 2c2df1a9..e7154c84 100644
--- a/drivers/gpu/nvgpu/gk20a/mm_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/mm_gk20a.h
@@ -471,6 +471,13 @@ u64 gk20a_gmmu_map(struct vm_gk20a *vm,
                 u32 flags,
                 int rw_flag,
                 bool priv);
+u64 gk20a_gmmu_fixed_map(struct vm_gk20a *vm,
+                struct sg_table **sgt,
+                u64 addr,
+                u64 size,
+                u32 flags,
+                int rw_flag,
+                bool priv);
 
 int gk20a_gmmu_alloc_map(struct vm_gk20a *vm,
                 size_t size,