gpu: nvgpu: posix: Add low level unit test IO mocking

Add an interface that the unit test modules can use to
interact with nvgpu IO accessors. This interface is
incredibly simple but not the easiest to use. More simple
wrappers will be added later.

JIRA NVGPU-1040

Change-Id: I325f09a1739a58ea6bcb1c74834037d6977ce0e8
Signed-off-by: Nicolas Benech <nbenech@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1741952
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/posix/os_posix.h b/drivers/gpu/nvgpu/os/posix/os_posix.h
index 955186ef..ff8c9817 100644
--- a/drivers/gpu/nvgpu/os/posix/os_posix.h
+++ b/drivers/gpu/nvgpu/os/posix/os_posix.h
@@ -25,8 +25,34 @@
 
 #include "gk20a/gk20a.h"
 
+struct nvgpu_posix_io_callbacks;
+
 struct nvgpu_os_posix {
         struct gk20a g;
+
+
+        /*
+         * IO callbacks for handling the nvgpu IO accessors.
+         */
+        struct nvgpu_posix_io_callbacks *callbacks;
+
+        /*
+         * Memory-mapped register space for unit tests.
+         */
+        struct nvgpu_list_node reg_space_head;
+        int error_code;
+
+
+        /*
+         * List to record sequence of register writes.
+         */
+        struct nvgpu_list_node recorder_head;
+        bool recording;
 };
 
+static inline struct nvgpu_os_posix *nvgpu_os_posix_from_gk20a(struct gk20a *g)
+{
+        return container_of(g, struct nvgpu_os_posix, g);
+}
+
 #endif