[PATCH 11/15] drm/i915: Use HWS for seqno tracking everywhere

[Chris Wilson <chris@chris-wilson.co.uk>]

By using the same address for storing the HWS on every platform, we can
remove the platform specific vfuncs and reduce the get-seqno routine to
a single read of a cached memory location.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_debugfs.c      |  6 +--
 drivers/gpu/drm/i915/i915_drv.h          |  4 +-
 drivers/gpu/drm/i915/i915_gpu_error.c    |  2 +-
 drivers/gpu/drm/i915/i915_irq.c          |  4 +-
 drivers/gpu/drm/i915/i915_trace.h        |  2 +-
 drivers/gpu/drm/i915/intel_breadcrumbs.c |  2 +-
 drivers/gpu/drm/i915/intel_lrc.c         | 46 ++---------------
 drivers/gpu/drm/i915/intel_ringbuffer.c  | 86 ++++++++------------------------
 drivers/gpu/drm/i915/intel_ringbuffer.h  |  7 +--
 9 files changed, 41 insertions(+), 118 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 99a79a10ce75..1ced3738281c 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -600,7 +600,7 @@ static int i915_gem_pageflip_info(struct seq_file *m, void *data)
 					   ring->name,
 					   i915_gem_request_get_seqno(work->flip_queued_req),
 					   dev_priv->next_seqno,
-					   ring->get_seqno(ring),
+					   intel_ring_get_seqno(ring),
 					   i915_gem_request_completed(work->flip_queued_req));
 			} else
 				seq_printf(m, "Flip not associated with any ring\n");
@@ -731,7 +731,7 @@ static void i915_ring_seqno_info(struct seq_file *m,
 				 struct intel_engine_cs *ring)
 {
 	seq_printf(m, "Current sequence (%s): %x\n",
-		   ring->name, ring->get_seqno(ring));
+		   ring->name, intel_ring_get_seqno(ring));
 }
 
 static int i915_gem_seqno_info(struct seq_file *m, void *data)
@@ -1340,7 +1340,7 @@ static int i915_hangcheck_info(struct seq_file *m, void *unused)
 	intel_runtime_pm_get(dev_priv);
 
 	for_each_ring(ring, dev_priv, i) {
-		seqno[i] = ring->get_seqno(ring);
+		seqno[i] = intel_ring_get_seqno(ring);
 		acthd[i] = intel_ring_get_active_head(ring);
 	}
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 8eb0871cd7af..410939c3f05b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2987,13 +2987,13 @@ i915_seqno_passed(uint32_t seq1, uint32_t seq2)
 
 static inline bool i915_gem_request_started(struct drm_i915_gem_request *req)
 {
-	return i915_seqno_passed(req->ring->get_seqno(req->ring),
+	return i915_seqno_passed(intel_ring_get_seqno(req->ring),
 				 req->previous_seqno);
 }
 
 static inline bool i915_gem_request_completed(struct drm_i915_gem_request *req)
 {
-	return i915_seqno_passed(req->ring->get_seqno(req->ring),
+	return i915_seqno_passed(intel_ring_get_seqno(req->ring),
 				 req->seqno);
 }
 
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 7a427240c813..b4e4796fac1a 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -904,7 +904,7 @@ static void i915_record_ring_state(struct drm_device *dev,
 	ering->waiting = READ_ONCE(dev_priv->breadcrumbs.engine[ring->id].first);
 	ering->instpm = I915_READ(RING_INSTPM(ring->mmio_base));
 	ering->acthd = intel_ring_get_active_head(ring);
-	ering->seqno = ring->get_seqno(ring);
+	ering->seqno = intel_ring_get_seqno(ring);
 	ering->start = I915_READ_START(ring);
 	ering->head = I915_READ_HEAD(ring);
 	ering->tail = I915_READ_TAIL(ring);
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 43078e09e1f0..86f98d8eacc8 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2871,7 +2871,7 @@ static int semaphore_passed(struct intel_engine_cs *ring)
 	if (signaller->hangcheck.deadlock >= I915_NUM_RINGS)
 		return -1;
 
-	if (i915_seqno_passed(signaller->get_seqno(signaller), seqno))
+	if (i915_seqno_passed(intel_ring_get_seqno(signaller), seqno))
 		return 1;
 
 	/* cursory check for an unkickable deadlock */
@@ -2975,7 +2975,7 @@ static void i915_hangcheck_elapsed(struct work_struct *work)
 		semaphore_clear_deadlocks(dev_priv);
 
 		acthd = intel_ring_get_active_head(ring);
-		seqno = ring->get_seqno(ring);
+		seqno = intel_ring_get_seqno(ring);
 
 		if (ring->hangcheck.seqno == seqno) {
 			if (ring_idle(ring, seqno)) {
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index cfb5f78a6e84..efca75bcace3 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -573,7 +573,7 @@ TRACE_EVENT(i915_gem_request_notify,
 	    TP_fast_assign(
 			   __entry->dev = ring->dev->primary->index;
 			   __entry->ring = ring->id;
-			   __entry->seqno = ring->get_seqno(ring);
+			   __entry->seqno = intel_ring_get_seqno(ring);
 			   ),
 
 	    TP_printk("dev=%u, ring=%u, seqno=%u",
diff --git a/drivers/gpu/drm/i915/intel_breadcrumbs.c b/drivers/gpu/drm/i915/intel_breadcrumbs.c
index b1b99068442c..4a22c6db39b4 100644
--- a/drivers/gpu/drm/i915/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/intel_breadcrumbs.c
@@ -110,7 +110,7 @@ static int intel_breadcrumbs_irq(void *data)
 			if (engine->seqno_barrier)
 				engine->seqno_barrier(engine);
 
-			seqno = engine->get_seqno(engine);
+			seqno = intel_ring_get_seqno(engine);
 			do {
 				struct rb_node *next;
 
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index fef97dc8e02d..c457dd035900 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1755,16 +1755,6 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
 	return 0;
 }
 
-static u32 gen8_get_seqno(struct intel_engine_cs *ring)
-{
-	return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
-}
-
-static void gen8_set_seqno(struct intel_engine_cs *ring, u32 seqno)
-{
-	intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno);
-}
-
 static void bxt_seqno_barrier(struct intel_engine_cs *ring)
 {
 	/*
@@ -1780,14 +1770,6 @@ static void bxt_seqno_barrier(struct intel_engine_cs *ring)
 	intel_flush_status_page(ring, I915_GEM_HWS_INDEX);
 }
 
-static void bxt_a_set_seqno(struct intel_engine_cs *ring, u32 seqno)
-{
-	intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno);
-
-	/* See bxt_a_get_seqno() explaining the reason for the clflush. */
-	intel_flush_status_page(ring, I915_GEM_HWS_INDEX);
-}
-
 static int gen8_emit_request(struct drm_i915_gem_request *request)
 {
 	struct intel_ringbuffer *ringbuf = request->ringbuf;
@@ -1812,7 +1794,7 @@ static int gen8_emit_request(struct drm_i915_gem_request *request)
 				(ring->status_page.gfx_addr +
 				(I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT)));
 	intel_logical_ring_emit(ringbuf, 0);
-	intel_logical_ring_emit(ringbuf, i915_gem_request_get_seqno(request));
+	intel_logical_ring_emit(ringbuf, request->seqno);
 	intel_logical_ring_emit(ringbuf, MI_USER_INTERRUPT);
 	intel_logical_ring_emit(ringbuf, MI_NOOP);
 	intel_logical_ring_advance_and_submit(request);
@@ -1972,12 +1954,8 @@ static int logical_render_ring_init(struct drm_device *dev)
 		ring->init_hw = gen8_init_render_ring;
 	ring->init_context = gen8_init_rcs_context;
 	ring->cleanup = intel_fini_pipe_control;
-	ring->get_seqno = gen8_get_seqno;
-	ring->set_seqno = gen8_set_seqno;
-	if (IS_BXT_REVID(dev, 0, BXT_REVID_A1)) {
+	if (IS_BXT_REVID(dev, 0, BXT_REVID_A1))
 		ring->seqno_barrier = bxt_seqno_barrier;
-		ring->set_seqno = bxt_a_set_seqno;
-	}
 	ring->emit_request = gen8_emit_request;
 	ring->emit_flush = gen8_emit_flush_render;
 	ring->irq_get = gen8_logical_ring_get_irq;
@@ -2023,12 +2001,8 @@ static int logical_bsd_ring_init(struct drm_device *dev)
 		GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT;
 
 	ring->init_hw = gen8_init_common_ring;
-	ring->get_seqno = gen8_get_seqno;
-	ring->set_seqno = gen8_set_seqno;
-	if (IS_BXT_REVID(dev, 0, BXT_REVID_A1)) {
+	if (IS_BXT_REVID(dev, 0, BXT_REVID_A1))
 		ring->seqno_barrier = bxt_seqno_barrier;
-		ring->set_seqno = bxt_a_set_seqno;
-	}
 	ring->emit_request = gen8_emit_request;
 	ring->emit_flush = gen8_emit_flush;
 	ring->irq_get = gen8_logical_ring_get_irq;
@@ -2052,8 +2026,6 @@ static int logical_bsd2_ring_init(struct drm_device *dev)
 		GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS2_IRQ_SHIFT;
 
 	ring->init_hw = gen8_init_common_ring;
-	ring->get_seqno = gen8_get_seqno;
-	ring->set_seqno = gen8_set_seqno;
 	ring->emit_request = gen8_emit_request;
 	ring->emit_flush = gen8_emit_flush;
 	ring->irq_get = gen8_logical_ring_get_irq;
@@ -2077,12 +2049,8 @@ static int logical_blt_ring_init(struct drm_device *dev)
 		GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT;
 
 	ring->init_hw = gen8_init_common_ring;
-	ring->get_seqno = gen8_get_seqno;
-	ring->set_seqno = gen8_set_seqno;
-	if (IS_BXT_REVID(dev, 0, BXT_REVID_A1)) {
+	if (IS_BXT_REVID(dev, 0, BXT_REVID_A1))
 		ring->seqno_barrier = bxt_seqno_barrier;
-		ring->set_seqno = bxt_a_set_seqno;
-	}
 	ring->emit_request = gen8_emit_request;
 	ring->emit_flush = gen8_emit_flush;
 	ring->irq_get = gen8_logical_ring_get_irq;
@@ -2106,12 +2074,8 @@ static int logical_vebox_ring_init(struct drm_device *dev)
 		GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT;
 
 	ring->init_hw = gen8_init_common_ring;
-	ring->get_seqno = gen8_get_seqno;
-	ring->set_seqno = gen8_set_seqno;
-	if (IS_BXT_REVID(dev, 0, BXT_REVID_A1)) {
+	if (IS_BXT_REVID(dev, 0, BXT_REVID_A1))
 		ring->seqno_barrier = bxt_seqno_barrier;
-		ring->set_seqno = bxt_a_set_seqno;
-	}
 	ring->emit_request = gen8_emit_request;
 	ring->emit_flush = gen8_emit_flush;
 	ring->irq_get = gen8_logical_ring_get_irq;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 98de72177d12..3d59dd555e64 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1232,19 +1232,17 @@ static int gen8_rcs_signal(struct drm_i915_gem_request *signaller_req,
 		return ret;
 
 	for_each_ring(waiter, dev_priv, i) {
-		u32 seqno;
 		u64 gtt_offset = signaller->semaphore.signal_ggtt[i];
 		if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID)
 			continue;
 
-		seqno = i915_gem_request_get_seqno(signaller_req);
 		intel_ring_emit(signaller, GFX_OP_PIPE_CONTROL(6));
 		intel_ring_emit(signaller, PIPE_CONTROL_GLOBAL_GTT_IVB |
 					   PIPE_CONTROL_QW_WRITE |
 					   PIPE_CONTROL_FLUSH_ENABLE);
 		intel_ring_emit(signaller, lower_32_bits(gtt_offset));
 		intel_ring_emit(signaller, upper_32_bits(gtt_offset));
-		intel_ring_emit(signaller, seqno);
+		intel_ring_emit(signaller, signaller_req->seqno);
 		intel_ring_emit(signaller, 0);
 		intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL |
 					   MI_SEMAPHORE_TARGET(waiter->id));
@@ -1273,18 +1271,16 @@ static int gen8_xcs_signal(struct drm_i915_gem_request *signaller_req,
 		return ret;
 
 	for_each_ring(waiter, dev_priv, i) {
-		u32 seqno;
 		u64 gtt_offset = signaller->semaphore.signal_ggtt[i];
 		if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID)
 			continue;
 
-		seqno = i915_gem_request_get_seqno(signaller_req);
 		intel_ring_emit(signaller, (MI_FLUSH_DW + 1) |
 					   MI_FLUSH_DW_OP_STOREDW);
 		intel_ring_emit(signaller, lower_32_bits(gtt_offset) |
 					   MI_FLUSH_DW_USE_GTT);
 		intel_ring_emit(signaller, upper_32_bits(gtt_offset));
-		intel_ring_emit(signaller, seqno);
+		intel_ring_emit(signaller, signaller_req->seqno);
 		intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL |
 					   MI_SEMAPHORE_TARGET(waiter->id));
 		intel_ring_emit(signaller, 0);
@@ -1315,11 +1311,9 @@ static int gen6_signal(struct drm_i915_gem_request *signaller_req,
 		i915_reg_t mbox_reg = signaller->semaphore.mbox.signal[i];
 
 		if (i915_mmio_reg_valid(mbox_reg)) {
-			u32 seqno = i915_gem_request_get_seqno(signaller_req);
-
 			intel_ring_emit(signaller, MI_LOAD_REGISTER_IMM(1));
 			intel_ring_emit_reg(signaller, mbox_reg);
-			intel_ring_emit(signaller, seqno);
+			intel_ring_emit(signaller, signaller_req->seqno);
 		}
 	}
 
@@ -1354,7 +1348,7 @@ gen6_add_request(struct drm_i915_gem_request *req)
 
 	intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
 	intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
-	intel_ring_emit(ring, i915_gem_request_get_seqno(req));
+	intel_ring_emit(ring, req->seqno);
 	intel_ring_emit(ring, MI_USER_INTERRUPT);
 	__intel_ring_advance(ring);
 
@@ -1456,7 +1450,9 @@ static int
 pc_render_add_request(struct drm_i915_gem_request *req)
 {
 	struct intel_engine_cs *ring = req->ring;
-	u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
+	u32 addr = req->ring->status_page.gfx_addr +
+		(I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
+	u32 scratch_addr = addr;
 	int ret;
 
 	/* For Ironlake, MI_USER_INTERRUPT was deprecated and apparently
@@ -1471,11 +1467,12 @@ pc_render_add_request(struct drm_i915_gem_request *req)
 	if (ret)
 		return ret;
 
-	intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE |
-			PIPE_CONTROL_WRITE_FLUSH |
-			PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE);
-	intel_ring_emit(ring, ring->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
-	intel_ring_emit(ring, i915_gem_request_get_seqno(req));
+	intel_ring_emit(ring,
+			GFX_OP_PIPE_CONTROL(4) |
+			PIPE_CONTROL_QW_WRITE |
+			PIPE_CONTROL_WRITE_FLUSH);
+	intel_ring_emit(ring, addr | PIPE_CONTROL_GLOBAL_GTT);
+	intel_ring_emit(ring, req->seqno);
 	intel_ring_emit(ring, 0);
 	PIPE_CONTROL_FLUSH(ring, scratch_addr);
 	scratch_addr += 2 * CACHELINE_BYTES; /* write to separate cachelines */
@@ -1489,12 +1486,12 @@ pc_render_add_request(struct drm_i915_gem_request *req)
 	scratch_addr += 2 * CACHELINE_BYTES;
 	PIPE_CONTROL_FLUSH(ring, scratch_addr);
 
-	intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE |
+	intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) |
+			PIPE_CONTROL_QW_WRITE |
 			PIPE_CONTROL_WRITE_FLUSH |
-			PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE |
 			PIPE_CONTROL_NOTIFY);
-	intel_ring_emit(ring, ring->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
-	intel_ring_emit(ring, i915_gem_request_get_seqno(req));
+	intel_ring_emit(ring, addr | PIPE_CONTROL_GLOBAL_GTT);
+	intel_ring_emit(ring, req->seqno);
 	intel_ring_emit(ring, 0);
 	__intel_ring_advance(ring);
 
@@ -1511,30 +1508,6 @@ gen6_seqno_barrier(struct intel_engine_cs *ring)
 	POSTING_READ(RING_ACTHD(ring->mmio_base));
 }
 
-static u32
-ring_get_seqno(struct intel_engine_cs *ring)
-{
-	return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
-}
-
-static void
-ring_set_seqno(struct intel_engine_cs *ring, u32 seqno)
-{
-	intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno);
-}
-
-static u32
-pc_render_get_seqno(struct intel_engine_cs *ring)
-{
-	return ring->scratch.cpu_page[0];
-}
-
-static void
-pc_render_set_seqno(struct intel_engine_cs *ring, u32 seqno)
-{
-	ring->scratch.cpu_page[0] = seqno;
-}
-
 static bool
 gen5_ring_get_irq(struct intel_engine_cs *ring)
 {
@@ -1670,7 +1643,7 @@ i9xx_add_request(struct drm_i915_gem_request *req)
 
 	intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
 	intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
-	intel_ring_emit(ring, i915_gem_request_get_seqno(req));
+	intel_ring_emit(ring, req->seqno);
 	intel_ring_emit(ring, MI_USER_INTERRUPT);
 	__intel_ring_advance(ring);
 
@@ -2462,7 +2435,10 @@ void intel_ring_init_seqno(struct intel_engine_cs *ring, u32 seqno)
 			I915_WRITE(RING_SYNC_2(ring->mmio_base), 0);
 	}
 
-	ring->set_seqno(ring, seqno);
+	intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno);
+	if (ring->seqno_barrier)
+		ring->seqno_barrier(ring);
+
 	ring->hangcheck.seqno = seqno;
 }
 
@@ -2700,8 +2676,6 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 		ring->irq_put = gen8_ring_put_irq;
 		ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT;
 		ring->seqno_barrier = gen6_seqno_barrier;
-		ring->get_seqno = ring_get_seqno;
-		ring->set_seqno = ring_set_seqno;
 		if (i915_semaphore_is_enabled(dev)) {
 			WARN_ON(!dev_priv->semaphore_obj);
 			ring->semaphore.sync_to = gen8_ring_sync;
@@ -2718,8 +2692,6 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 		ring->irq_put = gen6_ring_put_irq;
 		ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT;
 		ring->seqno_barrier = gen6_seqno_barrier;
-		ring->get_seqno = ring_get_seqno;
-		ring->set_seqno = ring_set_seqno;
 		if (i915_semaphore_is_enabled(dev)) {
 			ring->semaphore.sync_to = gen6_ring_sync;
 			ring->semaphore.signal = gen6_signal;
@@ -2744,8 +2716,6 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 	} else if (IS_GEN5(dev)) {
 		ring->add_request = pc_render_add_request;
 		ring->flush = gen4_render_ring_flush;
-		ring->get_seqno = pc_render_get_seqno;
-		ring->set_seqno = pc_render_set_seqno;
 		ring->irq_get = gen5_ring_get_irq;
 		ring->irq_put = gen5_ring_put_irq;
 		ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT |
@@ -2756,8 +2726,6 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 			ring->flush = gen2_render_ring_flush;
 		else
 			ring->flush = gen4_render_ring_flush;
-		ring->get_seqno = ring_get_seqno;
-		ring->set_seqno = ring_set_seqno;
 		if (IS_GEN2(dev)) {
 			ring->irq_get = i8xx_ring_get_irq;
 			ring->irq_put = i8xx_ring_put_irq;
@@ -2833,8 +2801,6 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
 		ring->flush = gen6_bsd_ring_flush;
 		ring->add_request = gen6_add_request;
 		ring->seqno_barrier = gen6_seqno_barrier;
-		ring->get_seqno = ring_get_seqno;
-		ring->set_seqno = ring_set_seqno;
 		if (INTEL_INFO(dev)->gen >= 8) {
 			ring->irq_enable_mask =
 				GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT;
@@ -2872,8 +2838,6 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
 		ring->mmio_base = BSD_RING_BASE;
 		ring->flush = bsd_ring_flush;
 		ring->add_request = i9xx_add_request;
-		ring->get_seqno = ring_get_seqno;
-		ring->set_seqno = ring_set_seqno;
 		if (IS_GEN5(dev)) {
 			ring->irq_enable_mask = ILK_BSD_USER_INTERRUPT;
 			ring->irq_get = gen5_ring_get_irq;
@@ -2906,8 +2870,6 @@ int intel_init_bsd2_ring_buffer(struct drm_device *dev)
 	ring->flush = gen6_bsd_ring_flush;
 	ring->add_request = gen6_add_request;
 	ring->seqno_barrier = gen6_seqno_barrier;
-	ring->get_seqno = ring_get_seqno;
-	ring->set_seqno = ring_set_seqno;
 	ring->irq_enable_mask =
 			GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT;
 	ring->irq_get = gen8_ring_get_irq;
@@ -2937,8 +2899,6 @@ int intel_init_blt_ring_buffer(struct drm_device *dev)
 	ring->flush = gen6_ring_flush;
 	ring->add_request = gen6_add_request;
 	ring->seqno_barrier = gen6_seqno_barrier;
-	ring->get_seqno = ring_get_seqno;
-	ring->set_seqno = ring_set_seqno;
 	if (INTEL_INFO(dev)->gen >= 8) {
 		ring->irq_enable_mask =
 			GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT;
@@ -2995,8 +2955,6 @@ int intel_init_vebox_ring_buffer(struct drm_device *dev)
 	ring->flush = gen6_ring_flush;
 	ring->add_request = gen6_add_request;
 	ring->seqno_barrier = gen6_seqno_barrier;
-	ring->get_seqno = ring_get_seqno;
-	ring->set_seqno = ring_set_seqno;
 
 	if (INTEL_INFO(dev)->gen >= 8) {
 		ring->irq_enable_mask =
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index af66119ecca9..74b9df21f062 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -194,9 +194,6 @@ struct  intel_engine_cs {
 	 * monotonic, even if not coherent.
 	 */
 	void		(*seqno_barrier)(struct intel_engine_cs *ring);
-	u32		(*get_seqno)(struct intel_engine_cs *ring);
-	void		(*set_seqno)(struct intel_engine_cs *ring,
-				     u32 seqno);
 	int		(*dispatch_execbuffer)(struct drm_i915_gem_request *req,
 					       u64 offset, u32 length,
 					       unsigned dispatch_flags);
@@ -472,6 +469,10 @@ int intel_init_blt_ring_buffer(struct drm_device *dev);
 int intel_init_vebox_ring_buffer(struct drm_device *dev);
 
 u64 intel_ring_get_active_head(struct intel_engine_cs *ring);
+static inline u32 intel_ring_get_seqno(struct intel_engine_cs *ring)
+{
+	return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
+}
 
 int init_workarounds_ring(struct intel_engine_cs *ring);
 
-- 
2.6.2

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