[RFC PATCH 38/42] drm/i915: Force parallel contexts to use copy engine for reloc

[Matthew Brost]

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>
---
 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 1a91e21132be..cf4288ce7141 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