Many tests used various incarnations of the mock register framework.
This was based on a dump of gv11b registers. Tests that greatly
benefitted from having generally sane register values all rely
heavily on this framework.
However, every test essentially did their own thing. This was not
efficient and has caused a some issues in cleaning up the device and
host code.
Therefore introduce a much leaner and simplified register framework.
All unit tests now automatically get a good subset of the gv11b
registers auto-populated. As part of this also populate the HAL with
a nvgpu_detect_chip() call. Many tests can now _probably_ have all
their HAL init (except dummy HAL stuff) deleted. But this does
require a few fixups here and there to set HALs to NULL where tests
expect HALs to be NULL by default.
Where necessary HALs are cleared with a memset to prevent unwanted
code from executing.
Overall, this imposes a far smaller burden on tests to initialize
their environments.
Something to consider for the future, though, is how to handle
supporting multiple chips in the unit test world.
JIRA NVGPU-5422
Change-Id: Icf1a63f728e9c5671ee0fdb726c235ffbd2843e2
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2335334
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The two MM functions nvgpu_set_pd_level() and nvgpu_vm_do_free_entries()
are simple recursive functions for processing page descriptors (PDs) by
traversing the levels in the PDs. MISRA Rule 17.2 prohibits functions
calling themselves because "unless recursion is tightly controlled, it
is not possible to determine before execution what the worst-case stack
usage could be." So, this change limits the recursion depth of each of
these functions to the maximum number of page table levels by checking
the level against the MM HAL max_page_table_levels().
This also required configuring this HAL in various unit tests as they
were no previously using this HAL.
JIRA NVGPU-3489
Change-Id: Iadee3fa5ba9f45cd643ac6c202e9296d75d51880
Signed-off-by: Philip Elcan <pelcan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2224450
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This patch adds unit testing for the mm.as unit including:
- feature tests
- error injection testing
- 100% line coverage and 96% branches (one missing branch that
cannot be tested or removed)
JIRA NVGPU-917
Change-Id: I54bdac21e56554d1d960955f1a140ab98c9f3e5e
Signed-off-by: Nicolas Benech <nbenech@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2194399
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