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authorBen Widawsky <benjamin.widawsky@intel.com>2014-04-29 14:52:29 -0700
committerDaniel Vetter <daniel.vetter@ffwll.ch>2014-05-05 10:56:53 +0200
commit78325f2d270897c9ee0887125b7abb963eb8efea (patch)
tree68112f7fcd949ced753c0ff964d6fa3eed5ad105 /drivers/gpu/drm/i915/intel_ringbuffer.c
parentebc348b2ad59ed5c9b22269f422d12095b640ff5 (diff)
drm/i915: Virtualize the ringbuffer signal func
This abstraction again is in preparation for gen8. Gen8 will bring new semantics for doing this operation. While here, make the writes of MI_NOOPs explicit for non-existent rings. This should have been implicit before. NOTE: This is going to be removed in a few patches. Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.c')
-rw-r--r--drivers/gpu/drm/i915/intel_ringbuffer.c42
1 files changed, 25 insertions, 17 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 3076a99b217..ea81b541ce0 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -663,20 +663,32 @@ static void render_ring_cleanup(struct intel_ring_buffer *ring)
ring->scratch.obj = NULL;
}
-static void
-update_mboxes(struct intel_ring_buffer *ring,
- u32 mmio_offset)
+static void gen6_signal(struct intel_ring_buffer *signaller)
{
+ struct drm_i915_private *dev_priv = signaller->dev->dev_private;
+ struct intel_ring_buffer *useless;
+ int i;
+
/* NB: In order to be able to do semaphore MBOX updates for varying number
* of rings, it's easiest if we round up each individual update to a
* multiple of 2 (since ring updates must always be a multiple of 2)
* even though the actual update only requires 3 dwords.
*/
#define MBOX_UPDATE_DWORDS 4
- intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
- intel_ring_emit(ring, mmio_offset);
- intel_ring_emit(ring, ring->outstanding_lazy_seqno);
- intel_ring_emit(ring, MI_NOOP);
+ for_each_ring(useless, dev_priv, i) {
+ u32 mbox_reg = signaller->semaphore.mbox.signal[i];
+ if (mbox_reg != GEN6_NOSYNC) {
+ intel_ring_emit(signaller, MI_LOAD_REGISTER_IMM(1));
+ intel_ring_emit(signaller, mbox_reg);
+ intel_ring_emit(signaller, signaller->outstanding_lazy_seqno);
+ intel_ring_emit(signaller, MI_NOOP);
+ } else {
+ intel_ring_emit(signaller, MI_NOOP);
+ intel_ring_emit(signaller, MI_NOOP);
+ intel_ring_emit(signaller, MI_NOOP);
+ intel_ring_emit(signaller, MI_NOOP);
+ }
+ }
}
/**
@@ -692,9 +704,7 @@ static int
gen6_add_request(struct intel_ring_buffer *ring)
{
struct drm_device *dev = ring->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_ring_buffer *useless;
- int i, ret, num_dwords = 4;
+ int ret, num_dwords = 4;
if (i915_semaphore_is_enabled(dev))
num_dwords += ((I915_NUM_RINGS-1) * MBOX_UPDATE_DWORDS);
@@ -704,13 +714,7 @@ gen6_add_request(struct intel_ring_buffer *ring)
if (ret)
return ret;
- if (i915_semaphore_is_enabled(dev)) {
- for_each_ring(useless, dev_priv, i) {
- u32 mbox_reg = ring->semaphore.mbox.signal[i];
- if (mbox_reg != GEN6_NOSYNC)
- update_mboxes(ring, mbox_reg);
- }
- }
+ ring->semaphore.signal(ring);
intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
@@ -1920,6 +1924,7 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
ring->get_seqno = gen6_ring_get_seqno;
ring->set_seqno = ring_set_seqno;
ring->semaphore.sync_to = gen6_ring_sync;
+ ring->semaphore.signal = gen6_signal;
/*
* The current semaphore is only applied on pre-gen8 platform.
* And there is no VCS2 ring on the pre-gen8 platform. So the
@@ -2104,6 +2109,7 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
gen6_ring_dispatch_execbuffer;
}
ring->semaphore.sync_to = gen6_ring_sync;
+ ring->semaphore.signal = gen6_signal;
/*
* The current semaphore is only applied on pre-gen8 platform.
* And there is no VCS2 ring on the pre-gen8 platform. So the
@@ -2221,6 +2227,7 @@ int intel_init_blt_ring_buffer(struct drm_device *dev)
ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
}
ring->semaphore.sync_to = gen6_ring_sync;
+ ring->semaphore.signal = gen6_signal;
/*
* The current semaphore is only applied on pre-gen8 platform. And
* there is no VCS2 ring on the pre-gen8 platform. So the semaphore
@@ -2270,6 +2277,7 @@ int intel_init_vebox_ring_buffer(struct drm_device *dev)
ring->dispatch_execbuffer = gen6_ring_dispatch_execbuffer;
}
ring->semaphore.sync_to = gen6_ring_sync;
+ ring->semaphore.signal = gen6_signal;
ring->semaphore.mbox.wait[RCS] = MI_SEMAPHORE_SYNC_VER;
ring->semaphore.mbox.wait[VCS] = MI_SEMAPHORE_SYNC_VEV;
ring->semaphore.mbox.wait[BCS] = MI_SEMAPHORE_SYNC_VEB;