drm/i915/guc: add engine mask to GuC client & pass to GuC

The Context Descriptor passed by the kernel to the GuC contains a field
specifying which engine(s) the context will use. Historically, this was
always set to "all of them", but if we had a separate client for each
engine, we could be more precise, and set only the bit for the engine
that the client was associated with. So this patch enables this usage,
in preparation for having multiple clients, though at this point there
is still only a single client used for all supported engines.

Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index af5c4cf8c113..405e445fba72 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -340,7 +340,7 @@ static void guc_init_ctx_desc(struct intel_guc *guc,
 	desc.priority = client->priority;
 	desc.db_id = client->doorbell_id;
 
-	for_each_engine(engine, dev_priv) {
+	for_each_engine_masked(engine, dev_priv, client->engines) {
 		struct intel_context *ce = &ctx->engine[engine->id];
 		struct guc_execlist_context *lrc = &desc.lrc[engine->guc_id];
 		struct drm_i915_gem_object *obj;
@@ -374,6 +374,8 @@ static void guc_init_ctx_desc(struct intel_guc *guc,
 		desc.engines_used |= (1 << engine->guc_id);
 	}
 
+	DRM_DEBUG_DRIVER("Host engines 0x%x => GuC engines used 0x%x\n",
+			client->engines, desc.engines_used);
 	WARN_ON(desc.engines_used == 0);
 
 	/*
@@ -764,6 +766,7 @@ static void guc_init_doorbell_hw(struct intel_guc *guc)
  */
 static struct i915_guc_client *
 guc_client_alloc(struct drm_i915_private *dev_priv,
+		 uint32_t engines,
 		 uint32_t priority,
 		 struct i915_gem_context *ctx)
 {
@@ -776,10 +779,11 @@ guc_client_alloc(struct drm_i915_private *dev_priv,
 	if (!client)
 		return NULL;
 
-	client->doorbell_id = GUC_INVALID_DOORBELL_ID;
-	client->priority = priority;
 	client->owner = ctx;
 	client->guc = guc;
+	client->engines = engines;
+	client->priority = priority;
+	client->doorbell_id = GUC_INVALID_DOORBELL_ID;
 
 	client->ctx_index = (uint32_t)ida_simple_get(&guc->ctx_ids, 0,
 			GUC_MAX_GPU_CONTEXTS, GFP_KERNEL);
@@ -821,8 +825,8 @@ guc_client_alloc(struct drm_i915_private *dev_priv,
 	if (guc_init_doorbell(guc, client, db_id))
 		goto err;
 
-	DRM_DEBUG_DRIVER("new priority %u client %p: ctx_index %u\n",
-		priority, client, client->ctx_index);
+	DRM_DEBUG_DRIVER("new priority %u client %p for engine(s) 0x%x: ctx_index %u\n",
+		priority, client, client->engines, client->ctx_index);
 	DRM_DEBUG_DRIVER("doorbell id %u, cacheline offset 0x%x\n",
 		client->doorbell_id, client->doorbell_offset);
 
@@ -1006,6 +1010,7 @@ int i915_guc_submission_enable(struct drm_i915_private *dev_priv)
 
 	/* client for execbuf submission */
 	client = guc_client_alloc(dev_priv,
+				  INTEL_INFO(dev_priv)->ring_mask,
 				  GUC_CTX_PRIORITY_KMD_NORMAL,
 				  dev_priv->kernel_context);
 	if (!client) {