[Intel-gfx] [PATCH 14/62] drm/i915/bdw: dispatch updates (64b related)

[Ben Widawsky]

The command to emit batch buffers has changed to address 48b addresses.
It seemed reasonable that we could still use the old instruction where
emitting 0 for length would do the right thing, but it seems to bother
the simulator when the code does that.

Now the second dword in the command has the upper 16b of the address of
the batchbuffer.

v2: Remove duplicated vfun assignment.

v3: Squash in VECS support changes from Zhao Yakui <yakui.zhao at intel.com>
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index b2161f2..60ef8ff 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1684,6 +1684,27 @@ static int gen6_bsd_ring_flush(struct intel_ring_buffer *ring,
 }
 
 static int
+gen8_ring_dispatch_execbuffer(struct intel_ring_buffer *ring,
+			      u32 offset, u32 len,
+			      unsigned flags)
+{
+	int ret;
+
+	ret = intel_ring_begin(ring, 4);
+	if (ret)
+		return ret;
+
+	intel_ring_emit(ring, MI_BATCH_BUFFER_START | 1);
+	/* bit0-7 is the length on GEN6+ */
+	intel_ring_emit(ring, offset);
+	intel_ring_emit(ring, 0);
+	intel_ring_emit(ring, MI_NOOP);
+	intel_ring_advance(ring);
+
+	return 0;
+}
+
+static int
 hsw_ring_dispatch_execbuffer(struct intel_ring_buffer *ring,
 			      u32 offset, u32 len,
 			      unsigned flags)
@@ -1822,6 +1843,8 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 	ring->write_tail = ring_write_tail;
 	if (IS_HASWELL(dev))
 		ring->dispatch_execbuffer = hsw_ring_dispatch_execbuffer;
+	else if (IS_GEN8(dev))
+		ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer;
 	else if (INTEL_INFO(dev)->gen >= 6)
 		ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
 	else if (INTEL_INFO(dev)->gen >= 4)
@@ -1948,12 +1971,13 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
 			ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT;
 			ring->irq_get = gen8_ring_get_irq;
 			ring->irq_put = gen8_ring_put_irq;
+			ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer;
 		} else {
 			ring->irq_enable_mask = GT_BSD_USER_INTERRUPT;
 			ring->irq_get = gen6_ring_get_irq;
 			ring->irq_put = gen6_ring_put_irq;
+			ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
 		}
-		ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
 		ring->sync_to = gen6_ring_sync;
 		ring->semaphore_register[RCS] = MI_SEMAPHORE_SYNC_VR;
 		ring->semaphore_register[VCS] = MI_SEMAPHORE_SYNC_INVALID;
@@ -2003,12 +2027,13 @@ int intel_init_blt_ring_buffer(struct drm_device *dev)
 		ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT;
 		ring->irq_get = gen8_ring_get_irq;
 		ring->irq_put = gen8_ring_put_irq;
+		ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer;
 	} else {
 		ring->irq_enable_mask = GT_BLT_USER_INTERRUPT;
 		ring->irq_get = gen6_ring_get_irq;
 		ring->irq_put = gen6_ring_put_irq;
+		ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
 	}
-	ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
 	ring->sync_to = gen6_ring_sync;
 	ring->semaphore_register[RCS] = MI_SEMAPHORE_SYNC_BR;
 	ring->semaphore_register[VCS] = MI_SEMAPHORE_SYNC_BV;
@@ -2037,7 +2062,6 @@ int intel_init_vebox_ring_buffer(struct drm_device *dev)
 	ring->add_request = gen6_add_request;
 	ring->get_seqno = gen6_ring_get_seqno;
 	ring->set_seqno = ring_set_seqno;
-	ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
 
 	if (INTEL_INFO(dev)->gen >= 8) {
 		ring->irq_enable_mask =
@@ -2045,10 +2069,12 @@ int intel_init_vebox_ring_buffer(struct drm_device *dev)
 			GT_RENDER_CS_MASTER_ERROR_INTERRUPT;
 		ring->irq_get = gen8_ring_get_irq;
 		ring->irq_put = gen8_ring_put_irq;
+		ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer;
 	} else {
 		ring->irq_enable_mask = PM_VEBOX_USER_INTERRUPT;
 		ring->irq_get = hsw_vebox_get_irq;
 		ring->irq_put = hsw_vebox_put_irq;
+		ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
 	}
 	ring->sync_to = gen6_ring_sync;
 	ring->semaphore_register[RCS] = MI_SEMAPHORE_SYNC_VER;
-- 
1.8.4.2