[Intel-gfx] [PATCH 36/62] drm/i915: Convert engine->write_tail to operate on a request
Chris Wilson
chris at chris-wilson.co.uk
Fri Jun 3 16:37:01 UTC 2016
If we rewrite the I915_WRITE_TAIL specialisation for the legacy
ringbuffer as submitting the request onto the ringbuffer, we can unify
the vfunc with both execlists and GuC in the next patch.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_gem_request.c | 5 +--
drivers/gpu/drm/i915/intel_ringbuffer.c | 63 ++++++++++++++++++---------------
drivers/gpu/drm/i915/intel_ringbuffer.h | 3 +-
3 files changed, 36 insertions(+), 35 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c
index 06f724ee23dd..5fef1c291b25 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -461,11 +461,8 @@ void __i915_add_request(struct drm_i915_gem_request *request,
if (i915.enable_execlists)
ret = engine->emit_request(request);
- else {
+ else
ret = engine->add_request(request);
-
- request->tail = intel_ring_get_tail(ring);
- }
/* Not allowed to fail! */
WARN(ret, "emit|add_request failed: %d!\n", ret);
/* Sanity check that the reserved size was large enough. */
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 943dc08c69df..db38abddfec1 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -58,13 +58,6 @@ void intel_ring_update_space(struct intel_ring *ring)
ring->tail, ring->size);
}
-static void __intel_engine_submit(struct intel_engine_cs *engine)
-{
- struct intel_ring *ring = engine->buffer;
- ring->tail &= ring->size - 1;
- engine->write_tail(engine, ring->tail);
-}
-
static int
gen2_render_ring_flush(struct drm_i915_gem_request *req,
u32 invalidate_domains,
@@ -420,13 +413,6 @@ gen8_render_ring_flush(struct drm_i915_gem_request *req,
return gen8_emit_pipe_control(req, flags, scratch_addr);
}
-static void ring_write_tail(struct intel_engine_cs *engine,
- u32 value)
-{
- struct drm_i915_private *dev_priv = engine->i915;
- I915_WRITE_TAIL(engine, value);
-}
-
u64 intel_engine_get_active_head(struct intel_engine_cs *engine)
{
struct drm_i915_private *dev_priv = engine->i915;
@@ -535,7 +521,7 @@ static bool stop_ring(struct intel_engine_cs *engine)
I915_WRITE_CTL(engine, 0);
I915_WRITE_HEAD(engine, 0);
- engine->write_tail(engine, 0);
+ I915_WRITE_TAIL(engine, 0);
if (!IS_GEN2(dev_priv)) {
(void)I915_READ_CTL(engine);
@@ -1380,7 +1366,11 @@ gen6_add_request(struct drm_i915_gem_request *req)
intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
intel_ring_emit(ring, req->fence.seqno);
intel_ring_emit(ring, MI_USER_INTERRUPT);
- __intel_engine_submit(req->engine);
+ intel_ring_advance(ring);
+
+ req->tail = intel_ring_get_tail(ring);
+
+ req->engine->submit_request(req);
return 0;
}
@@ -1410,7 +1400,8 @@ gen8_render_add_request(struct drm_i915_gem_request *req)
intel_ring_emit(ring, 0);
intel_ring_emit(ring, MI_USER_INTERRUPT);
intel_ring_emit(ring, MI_NOOP);
- __intel_engine_submit(engine);
+
+ req->engine->submit_request(req);
return 0;
}
@@ -1632,11 +1623,21 @@ i9xx_add_request(struct drm_i915_gem_request *req)
intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
intel_ring_emit(ring, req->fence.seqno);
intel_ring_emit(ring, MI_USER_INTERRUPT);
- __intel_engine_submit(req->engine);
+ intel_ring_advance(ring);
+
+ req->tail = intel_ring_get_tail(ring);
+
+ req->engine->submit_request(req);
return 0;
}
+static void i9xx_submit_request(struct drm_i915_gem_request *request)
+{
+ struct drm_i915_private *dev_priv = request->i915;
+ I915_WRITE_TAIL(request->engine, request->tail);
+}
+
static void
gen6_ring_enable_irq(struct intel_engine_cs *engine)
{
@@ -2395,10 +2396,9 @@ void intel_engine_init_seqno(struct intel_engine_cs *engine, u32 seqno)
engine->hangcheck.seqno = seqno;
}
-static void gen6_bsd_ring_write_tail(struct intel_engine_cs *engine,
- u32 value)
+static void gen6_bsd_submit_request(struct drm_i915_gem_request *request)
{
- struct drm_i915_private *dev_priv = engine->i915;
+ struct drm_i915_private *dev_priv = request->i915;
/* Every tail move must follow the sequence below */
@@ -2418,8 +2418,8 @@ static void gen6_bsd_ring_write_tail(struct intel_engine_cs *engine,
DRM_ERROR("timed out waiting for the BSD ring to wake up\n");
/* Now that the ring is fully powered up, update the tail */
- I915_WRITE_TAIL(engine, value);
- POSTING_READ(RING_TAIL(engine->mmio_base));
+ I915_WRITE_TAIL(request->engine, request->tail);
+ POSTING_READ(RING_TAIL(request->engine->mmio_base));
/* Let the ring send IDLE messages to the GT again,
* and so let it sleep to conserve power when idle.
@@ -2609,6 +2609,8 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
if (HAS_L3_DPF(dev_priv))
engine->irq_keep_mask = GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
+ engine->submit_request = i9xx_submit_request;
+
if (INTEL_GEN(dev_priv) >= 8) {
if (i915.semaphores) {
obj = i915_gem_object_create(dev, 4096);
@@ -2692,7 +2694,6 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
}
engine->irq_enable_mask = I915_USER_INTERRUPT;
}
- engine->write_tail = ring_write_tail;
if (IS_HASWELL(dev_priv))
engine->emit_bb_start = hsw_emit_bb_start;
@@ -2736,12 +2737,13 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
engine->exec_id = I915_EXEC_BSD;
engine->hw_id = 1;
- engine->write_tail = ring_write_tail;
+ engine->submit_request = i9xx_submit_request;
+
if (INTEL_GEN(dev_priv) >= 6) {
engine->mmio_base = GEN6_BSD_RING_BASE;
/* gen6 bsd needs a special wa for tail updates */
if (IS_GEN6(dev_priv))
- engine->write_tail = gen6_bsd_ring_write_tail;
+ engine->submit_request = gen6_bsd_submit_request;
engine->emit_flush = gen6_bsd_ring_flush;
engine->add_request = gen6_add_request;
engine->irq_seqno_barrier = gen6_seqno_barrier;
@@ -2810,10 +2812,11 @@ int intel_init_bsd2_ring_buffer(struct drm_device *dev)
engine->exec_id = I915_EXEC_BSD;
engine->hw_id = 4;
- engine->write_tail = ring_write_tail;
engine->mmio_base = GEN8_BSD2_RING_BASE;
engine->emit_flush = gen6_bsd_ring_flush;
engine->add_request = gen6_add_request;
+ engine->submit_request = i9xx_submit_request;
+
engine->irq_seqno_barrier = gen6_seqno_barrier;
engine->irq_enable_mask =
GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT;
@@ -2841,9 +2844,10 @@ int intel_init_blt_ring_buffer(struct drm_device *dev)
engine->hw_id = 2;
engine->mmio_base = BLT_RING_BASE;
- engine->write_tail = ring_write_tail;
engine->emit_flush = gen6_ring_flush;
engine->add_request = gen6_add_request;
+ engine->submit_request = i9xx_submit_request;
+
engine->irq_seqno_barrier = gen6_seqno_barrier;
if (INTEL_GEN(dev_priv) >= 8) {
engine->irq_enable_mask =
@@ -2899,9 +2903,10 @@ int intel_init_vebox_ring_buffer(struct drm_device *dev)
engine->hw_id = 3;
engine->mmio_base = VEBOX_RING_BASE;
- engine->write_tail = ring_write_tail;
engine->emit_flush = gen6_ring_flush;
engine->add_request = gen6_add_request;
+ engine->submit_request = i9xx_submit_request;
+
engine->irq_seqno_barrier = gen6_seqno_barrier;
if (INTEL_GEN(dev_priv) >= 8) {
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 8b8e55a3e62e..647cc51e6457 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -212,8 +212,6 @@ struct intel_engine_cs {
int (*init_context)(struct drm_i915_gem_request *req);
- void (*write_tail)(struct intel_engine_cs *ring,
- u32 value);
int (*add_request)(struct drm_i915_gem_request *req);
/* Some chipsets are not quite as coherent as advertised and need
* an expensive kick to force a true read of the up-to-date seqno.
@@ -302,6 +300,7 @@ struct intel_engine_cs {
#define I915_DISPATCH_SECURE 0x1
#define I915_DISPATCH_PINNED 0x2
#define I915_DISPATCH_RS 0x4
+ void (*submit_request)(struct drm_i915_gem_request *req);
/**
* List of objects currently involved in rendering from the
--
2.8.1
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