[PATCH 24/43] drm/i915/bdw: GEN-specific logical ring emit batchbuffer start

Thomas Daniel
2014-07-24T16:05:17Z

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

Dispatch_execbuffer's evil twin.

Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
---
drivers/gpu/drm/i915/intel_lrc.c | 28 ++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_ringbuffer.h | 2 ++
2 files changed, 30 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index a6dcb3a..55ee8dd 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -384,6 +384,29 @@ static int gen8_init_render_ring(struct intel_engine_cs *ring)
return ret;
}

+static int gen8_emit_bb_start(struct intel_ringbuffer *ringbuf,
+ u64 offset, unsigned flags)
+{
+ struct intel_engine_cs *ring = ringbuf->ring;
+ struct drm_i915_private *dev_priv = ring->dev->dev_private;
+ bool ppgtt = dev_priv->mm.aliasing_ppgtt != NULL &&
+ !(flags & I915_DISPATCH_SECURE);
+ int ret;
+
+ ret = intel_logical_ring_begin(ringbuf, 4);
+ if (ret)
+ return ret;
+
+ /* FIXME(BDW): Address space and security selectors. */
+ intel_logical_ring_emit(ringbuf, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8));
+ intel_logical_ring_emit(ringbuf, lower_32_bits(offset));
+ intel_logical_ring_emit(ringbuf, upper_32_bits(offset));
+ intel_logical_ring_emit(ringbuf, MI_NOOP);
+ intel_logical_ring_advance(ringbuf);
+
+ return 0;
+}
+
static bool gen8_logical_ring_get_irq(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
@@ -615,6 +638,7 @@ static int logical_render_ring_init(struct drm_device *dev)
ring->emit_flush = gen8_emit_flush_render;
ring->irq_get = gen8_logical_ring_get_irq;
ring->irq_put = gen8_logical_ring_put_irq;
+ ring->emit_bb_start = gen8_emit_bb_start;

return logical_ring_init(dev, ring);
}
@@ -639,6 +663,7 @@ static int logical_bsd_ring_init(struct drm_device *dev)
ring->emit_flush = gen8_emit_flush;
ring->irq_get = gen8_logical_ring_get_irq;
ring->irq_put = gen8_logical_ring_put_irq;
+ ring->emit_bb_start = gen8_emit_bb_start;

return logical_ring_init(dev, ring);
}
@@ -663,6 +688,7 @@ static int logical_bsd2_ring_init(struct drm_device *dev)
ring->emit_flush = gen8_emit_flush;
ring->irq_get = gen8_logical_ring_get_irq;
ring->irq_put = gen8_logical_ring_put_irq;
+ ring->emit_bb_start = gen8_emit_bb_start;

return logical_ring_init(dev, ring);
}
@@ -687,6 +713,7 @@ static int logical_blt_ring_init(struct drm_device *dev)
ring->emit_flush = gen8_emit_flush;
ring->irq_get = gen8_logical_ring_get_irq;
ring->irq_put = gen8_logical_ring_put_irq;
+ ring->emit_bb_start = gen8_emit_bb_start;

return logical_ring_init(dev, ring);
}
@@ -711,6 +738,7 @@ static int logical_vebox_ring_init(struct drm_device *dev)
ring->emit_flush = gen8_emit_flush;
ring->irq_get = gen8_logical_ring_get_irq;
ring->irq_put = gen8_logical_ring_put_irq;
+ ring->emit_bb_start = gen8_emit_bb_start;

return logical_ring_init(dev, ring);
}
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 09102b2..c885d5c 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -228,6 +228,8 @@ struct intel_engine_cs {
int (*emit_flush)(struct intel_ringbuffer *ringbuf,
u32 invalidate_domains,
u32 flush_domains);
+ int (*emit_bb_start)(struct intel_ringbuffer *ringbuf,
+ u64 offset, unsigned flags);

/**
* List of objects currently involved in rendering from the
--
1.7.9.5