[PATCH 39/46] drm/i915: Force parallel contexts to use copy engine for reloc

[Daniel Vetter]

On Tue, Aug 03, 2021 at 03:29:36PM -0700, Matthew Brost wrote:
> Submitting to a subset of hardware contexts is not allowed, so use the
> copy engine for GPU relocations when using a parallel context.
> 
> Signed-off-by: Matthew Brost <matthew.brost at intel.com>

Luckily I just pushed the patches to delete all this, so you can too.
-Daniel

> ---
>  drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> index b224b28530d1..b6143973ac67 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> @@ -1386,7 +1386,8 @@ static int __reloc_gpu_alloc(struct i915_execbuffer *eb,
>  	if (err)
>  		goto err_unmap;
>  
> -	if (engine == eb->context->engine) {
> +	if (engine == eb->context->engine &&
> +	    !intel_context_is_parallel(eb->context)) {
>  		rq = i915_request_create(eb->context);
>  	} else {
>  		struct intel_context *ce = eb->reloc_context;
> @@ -1483,7 +1484,8 @@ static u32 *reloc_gpu(struct i915_execbuffer *eb,
>  		if (eb_use_cmdparser(eb))
>  			return ERR_PTR(-EWOULDBLOCK);
>  
> -		if (!reloc_can_use_engine(engine)) {
> +		if (!reloc_can_use_engine(engine) ||
> +		    intel_context_is_parallel(eb->context)) {
>  			engine = engine->gt->engine_class[COPY_ENGINE_CLASS][0];
>  			if (!engine)
>  				return ERR_PTR(-ENODEV);
> -- 
> 2.28.0
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch