Re: [igt-dev] [PATCH i-g-t 1/4] i915/gem_ctx_engines: Exercise 0 engines[]

[Antonio Argenziano <antonio.argenziano@intel.com>]

On 14/02/20 11:40, Chris Wilson wrote:
> Setup a context with no engines, and make sure we reject all execution
> attempts.
> 
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

Reviewed-by: Antonio Argenziano <antonio.argenziano@intel.com>

> ---
>   tests/i915/gem_ctx_engines.c | 45 ++++++++++++++++++++++++++++++++++++
>   1 file changed, 45 insertions(+)
> 
> diff --git a/tests/i915/gem_ctx_engines.c b/tests/i915/gem_ctx_engines.c
> index cb82f08ef..063140e0f 100644
> --- a/tests/i915/gem_ctx_engines.c
> +++ b/tests/i915/gem_ctx_engines.c
> @@ -242,6 +242,48 @@ static void idempotent(int i915)
>   	gem_context_destroy(i915, p.ctx_id);
>   }
>   
> +static uint32_t batch_create(int i915)
> +{
> +	const uint32_t bbe = MI_BATCH_BUFFER_END;
> +	uint32_t handle = gem_create(i915, 4096);
> +
> +	gem_write(i915, handle, 0, &bbe, sizeof(bbe));
> +	return handle;
> +}
> +
> +static void none(int i915)
> +{
> +	struct i915_context_param_engines engines = {};
> +	struct drm_i915_gem_context_param p = {
> +		.ctx_id = gem_context_create(i915),
> +		.param = I915_CONTEXT_PARAM_ENGINES,
> +		.value = to_user_pointer(&engines),
> +		.size = sizeof(engines),
> +	};
> +
> +	gem_context_set_param(i915, &p);
> +
> +	{
> +		struct drm_i915_gem_exec_object2 obj = {
> +			.handle = batch_create(i915),
> +		};
> +		struct drm_i915_gem_execbuffer2 execbuf = {
> +			.buffers_ptr = to_user_pointer(&obj),
> +			.buffer_count = 1,
> +			.rsvd1 = p.ctx_id,
> +		};
> +
> +		for (execbuf.flags = 0;
> +		     execbuf.flags <= I915_EXEC_RING_MASK;
> +		     execbuf.flags++)
> +			igt_assert_eq(__gem_execbuf(i915, &execbuf), -EINVAL);
> +
> +		gem_close(i915, obj.handle);
> +	}
> +
> +	gem_context_destroy(i915, p.ctx_id);
> +}
> +
>   static void execute_one(int i915)
>   {
>   	I915_DEFINE_CONTEXT_PARAM_ENGINES(engines , I915_EXEC_RING_MASK + 1);
> @@ -527,6 +569,9 @@ igt_main
>   	igt_subtest("idempotent")
>   		idempotent(i915);
>   
> +	igt_subtest("none")
> +		none(i915);
> +
>   	igt_subtest("execute-one")
>   		execute_one(i915);
>   
> 
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