[Intel-gfx] [RFC 3/4] drm/i915/gt: Export the pinned context constructor

[Chris Wilson]

Allow internal clients to create a pinned context.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/intel_engine.h    |  8 ++++++++
 drivers/gpu/drm/i915/gt/intel_engine_cs.c | 17 ++++++++++-------
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h
index 760fefdfe392..ac58fcda4927 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine.h
@@ -19,7 +19,9 @@
 #include "intel_workarounds.h"
 
 struct drm_printer;
+struct intel_context;
 struct intel_gt;
+struct lock_class_key;
 
 /* Early gen2 devices have a cacheline of just 32 bytes, using 64 is overkill,
  * but keeps the logic simple. Indeed, the whole purpose of this macro is just
@@ -336,6 +338,12 @@ struct i915_request *
 intel_engine_find_active_request(struct intel_engine_cs *engine);
 
 u32 intel_engine_context_size(struct intel_gt *gt, u8 class);
+struct intel_context *
+intel_engine_create_pinned_context(struct intel_engine_cs *engine,
+				   unsigned int ring_size,
+				   unsigned int hwsp,
+				   struct lock_class_key *key,
+				   const char *name);
 
 void intel_engine_init_active(struct intel_engine_cs *engine,
 			      unsigned int subclass);
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index d4e988b2816a..f37de40f8a4f 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -796,11 +796,12 @@ intel_engine_init_active(struct intel_engine_cs *engine, unsigned int subclass)
 #endif
 }
 
-static struct intel_context *
-create_pinned_context(struct intel_engine_cs *engine,
-		      unsigned int hwsp,
-		      struct lock_class_key *key,
-		      const char *name)
+struct intel_context *
+intel_engine_create_pinned_context(struct intel_engine_cs *engine,
+				   unsigned int ring_size,
+				   unsigned int hwsp,
+				   struct lock_class_key *key,
+				   const char *name)
 {
 	struct intel_context *ce;
 	int err;
@@ -811,6 +812,7 @@ create_pinned_context(struct intel_engine_cs *engine,
 
 	__set_bit(CONTEXT_BARRIER_BIT, &ce->flags);
 	ce->timeline = page_pack_bits(NULL, hwsp);
+	ce->ring = __intel_context_ring_size(ring_size);
 
 	err = intel_context_pin(ce); /* perma-pin so it is always available */
 	if (err) {
@@ -834,8 +836,9 @@ create_kernel_context(struct intel_engine_cs *engine)
 {
 	static struct lock_class_key kernel;
 
-	return create_pinned_context(engine, I915_GEM_HWS_SEQNO_ADDR,
-				     &kernel, "kernel_context");
+	return intel_engine_create_pinned_context(engine, SZ_4K,
+						  I915_GEM_HWS_SEQNO_ADDR,
+						  &kernel, "kernel_context");
 }
 
 /**
-- 
2.20.1