[PATCH 08/43] drm/i915/bdw: Add a context and an engine pointers to the ringbuffer

[Thomas Daniel <thomas.daniel@intel.com>]

From: Oscar Mateo <oscar.mateo@intel.com>

Any given ringbuffer is unequivocally tied to one context and one engine.
By setting the appropriate pointers to them, the ringbuffer struct holds
all the infromation you might need to submit a workload for processing,
Execlists style.

Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
---
 drivers/gpu/drm/i915/intel_lrc.c        |    2 ++
 drivers/gpu/drm/i915/intel_ringbuffer.c |    2 ++
 drivers/gpu/drm/i915/intel_ringbuffer.h |    3 +++
 3 files changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 0a12b8c..2eb7db6 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -132,6 +132,8 @@ int intel_lr_context_deferred_create(struct intel_context *ctx,
 		return ret;
 	}
 
+	ringbuf->ring = ring;
+	ringbuf->ctx = ctx;
 	ringbuf->size = 32 * PAGE_SIZE;
 	ringbuf->effective_size = ringbuf->size;
 	ringbuf->head = 0;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 01e9840..279dda4 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1570,6 +1570,8 @@ static int intel_init_ring_buffer(struct drm_device *dev,
 	INIT_LIST_HEAD(&ring->active_list);
 	INIT_LIST_HEAD(&ring->request_list);
 	ringbuf->size = 32 * PAGE_SIZE;
+	ringbuf->ring = ring;
+	ringbuf->ctx = ring->default_context;
 	memset(ring->semaphore.sync_seqno, 0, sizeof(ring->semaphore.sync_seqno));
 
 	init_waitqueue_head(&ring->irq_queue);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 053d004..be40788 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -88,6 +88,9 @@ struct intel_ringbuffer {
 	struct drm_i915_gem_object *obj;
 	void __iomem *virtual_start;
 
+	struct intel_engine_cs *ring;
+	struct intel_context *ctx;
+
 	u32 head;
 	u32 tail;
 	int space;
-- 
1.7.9.5