[PATCH 5/6] drm/i915: Teach to_i915() how to extract drm_i915_private from requests

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Since drm_i915_gem_request already contains a backpointer to
drm_i915_private, this is a fairly trivial operation. However, using a
consistent interface does lean convenience to when we need to query
device properties, for example.

Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_drv.h            |  8 ++++++
 drivers/gpu/drm/i915/i915_gem.c            | 16 +++++-------
 drivers/gpu/drm/i915/i915_gem_context.c    | 21 ++++++++--------
 drivers/gpu/drm/i915/i915_gem_execbuffer.c |  3 +--
 drivers/gpu/drm/i915/i915_gem_gtt.c        |  3 +--
 drivers/gpu/drm/i915/intel_lrc.c           | 24 ++++++++----------
 drivers/gpu/drm/i915/intel_mocs.c          |  2 +-
 drivers/gpu/drm/i915/intel_pm.c            |  3 +--
 drivers/gpu/drm/i915/intel_ringbuffer.c    | 40 +++++++++++++-----------------
 9 files changed, 56 insertions(+), 64 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index d5fa42c96110..d6840d380ca5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2293,6 +2293,12 @@ struct drm_i915_gem_request {
 
 };
 
+static inline struct drm_i915_private *
+__request_to_i915(struct drm_i915_gem_request *request)
+{
+	return request->i915;
+}
+
 struct drm_i915_gem_request * __must_check
 i915_gem_request_alloc(struct intel_engine_cs *engine,
 		       struct intel_context *ctx);
@@ -2465,6 +2471,8 @@ struct drm_i915_cmd_table {
 		__p = __obj_to_i915((struct drm_i915_gem_object *)p); \
 	else if (__builtin_types_compatible_p(typeof(*p), struct intel_guc)) \
 		__p = __guc_to_i915((struct intel_guc *)p); \
+	else if (__builtin_types_compatible_p(typeof(*p), struct drm_i915_gem_request)) \
+		__p = __request_to_i915((struct drm_i915_gem_request *)(p)); \
 	else \
 		BUILD_BUG(); \
 	__p; \
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 710a6bbc985e..7e98cf884972 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1455,18 +1455,16 @@ __i915_gem_request_retire__upto(struct drm_i915_gem_request *req)
 int
 i915_wait_request(struct drm_i915_gem_request *req)
 {
-	struct drm_device *dev;
 	struct drm_i915_private *dev_priv;
 	bool interruptible;
 	int ret;
 
 	BUG_ON(req == NULL);
 
-	dev = req->engine->dev;
-	dev_priv = dev->dev_private;
+	dev_priv = to_i915(req);
 	interruptible = dev_priv->mm.interruptible;
 
-	BUG_ON(!mutex_is_locked(&dev->struct_mutex));
+	BUG_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex));
 
 	ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible);
 	if (ret)
@@ -2674,13 +2672,13 @@ void i915_gem_request_free(struct kref *req_ref)
 		i915_gem_request_remove_from_client(req);
 
 	if (ctx) {
-		if (i915.enable_execlists && ctx != req->i915->kernel_context)
+		if (i915.enable_execlists && ctx != to_i915(req)->kernel_context)
 			intel_lr_context_unpin(ctx, req->engine);
 
 		i915_gem_context_unreference(ctx);
 	}
 
-	kmem_cache_free(req->i915->requests, req);
+	kmem_cache_free(to_i915(req)->requests, req);
 }
 
 static inline int
@@ -4692,12 +4690,10 @@ err:
 int i915_gem_l3_remap(struct drm_i915_gem_request *req, int slice)
 {
 	struct intel_engine_cs *engine = req->engine;
-	struct drm_device *dev = engine->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	u32 *remap_info = dev_priv->l3_parity.remap_info[slice];
+	u32 *remap_info = to_i915(req)->l3_parity.remap_info[slice];
 	int i, ret;
 
-	if (!HAS_L3_DPF(dev) || !remap_info)
+	if (!HAS_L3_DPF(req) || !remap_info)
 		return 0;
 
 	ret = intel_ring_begin(req, GEN7_L3LOG_SIZE / 4 * 3);
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index a8afd0cee7f7..ccaa106f6936 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -515,7 +515,7 @@ mi_set_context(struct drm_i915_gem_request *req, u32 hw_flags)
 	const int num_rings =
 		/* Use an extended w/a on ivb+ if signalling from other rings */
 		i915_semaphore_is_enabled(engine->dev) ?
-		hweight32(INTEL_INFO(engine->dev)->ring_mask) - 1 :
+		hweight32(INTEL_INFO(req)->ring_mask) - 1 :
 		0;
 	int len, i, ret;
 
@@ -524,21 +524,21 @@ mi_set_context(struct drm_i915_gem_request *req, u32 hw_flags)
 	 * explicitly, so we rely on the value at ring init, stored in
 	 * itlb_before_ctx_switch.
 	 */
-	if (IS_GEN6(engine->dev)) {
+	if (IS_GEN6(req)) {
 		ret = engine->flush(req, I915_GEM_GPU_DOMAINS, 0);
 		if (ret)
 			return ret;
 	}
 
 	/* These flags are for resource streamer on HSW+ */
-	if (IS_HASWELL(engine->dev) || INTEL_INFO(engine->dev)->gen >= 8)
+	if (IS_HASWELL(req) || INTEL_INFO(req)->gen >= 8)
 		flags |= (HSW_MI_RS_SAVE_STATE_EN | HSW_MI_RS_RESTORE_STATE_EN);
-	else if (INTEL_INFO(engine->dev)->gen < 8)
+	else if (INTEL_INFO(req)->gen < 8)
 		flags |= (MI_SAVE_EXT_STATE_EN | MI_RESTORE_EXT_STATE_EN);
 
 
 	len = 4;
-	if (INTEL_INFO(engine->dev)->gen >= 7)
+	if (INTEL_INFO(req)->gen >= 7)
 		len += 2 + (num_rings ? 4*num_rings + 2 : 0);
 
 	ret = intel_ring_begin(req, len);
@@ -546,14 +546,14 @@ mi_set_context(struct drm_i915_gem_request *req, u32 hw_flags)
 		return ret;
 
 	/* WaProgramMiArbOnOffAroundMiSetContext:ivb,vlv,hsw,bdw,chv */
-	if (INTEL_INFO(engine->dev)->gen >= 7) {
+	if (INTEL_INFO(req)->gen >= 7) {
 		intel_ring_emit(engine, MI_ARB_ON_OFF | MI_ARB_DISABLE);
 		if (num_rings) {
 			struct intel_engine_cs *signaller;
 
 			intel_ring_emit(engine,
 					MI_LOAD_REGISTER_IMM(num_rings));
-			for_each_engine(signaller, engine->dev, i) {
+			for_each_engine(signaller, req, i) {
 				if (signaller == engine)
 					continue;
 
@@ -576,13 +576,13 @@ mi_set_context(struct drm_i915_gem_request *req, u32 hw_flags)
 	 */
 	intel_ring_emit(engine, MI_NOOP);
 
-	if (INTEL_INFO(engine->dev)->gen >= 7) {
+	if (INTEL_INFO(req)->gen >= 7) {
 		if (num_rings) {
 			struct intel_engine_cs *signaller;
 
 			intel_ring_emit(engine,
 					MI_LOAD_REGISTER_IMM(num_rings));
-			for_each_engine(signaller, engine->dev, i) {
+			for_each_engine(signaller, req, i) {
 				if (signaller == engine)
 					continue;
 
@@ -829,10 +829,9 @@ unpin_out:
 int i915_switch_context(struct drm_i915_gem_request *req)
 {
 	struct intel_engine_cs *engine = req->engine;
-	struct drm_i915_private *dev_priv = req->i915;
 
 	WARN_ON(i915.enable_execlists);
-	WARN_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex));
+	WARN_ON(!mutex_is_locked(&to_i915(req)->dev->struct_mutex));
 
 	if (req->ctx->legacy_hw_ctx.rcs_state == NULL) { /* We have the fake context */
 		if (req->ctx != engine->last_context) {
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 39ed403b9de3..28614c4ecbc5 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1096,7 +1096,6 @@ void
 i915_gem_execbuffer_move_to_active(struct list_head *vmas,
 				   struct drm_i915_gem_request *req)
 {
-	struct intel_engine_cs *engine = i915_gem_request_get_engine(req);
 	struct i915_vma *vma;
 
 	list_for_each_entry(vma, vmas, exec_list) {
@@ -1123,7 +1122,7 @@ i915_gem_execbuffer_move_to_active(struct list_head *vmas,
 		if (entry->flags & EXEC_OBJECT_NEEDS_FENCE) {
 			i915_gem_request_assign(&obj->last_fenced_req, req);
 			if (entry->flags & __EXEC_OBJECT_HAS_FENCE) {
-				struct drm_i915_private *dev_priv = to_i915(engine->dev);
+				struct drm_i915_private *dev_priv = to_i915(req);
 				list_move_tail(&dev_priv->fence_regs[obj->fence_reg].lru_list,
 					       &dev_priv->mm.fence_list);
 			}
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 6447a5f9661e..8eb64f5ed78c 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2192,8 +2192,7 @@ int i915_ppgtt_init_hw(struct drm_device *dev)
 
 int i915_ppgtt_init_ring(struct drm_i915_gem_request *req)
 {
-	struct drm_i915_private *dev_priv = req->i915;
-	struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt;
+	struct i915_hw_ppgtt *ppgtt = to_i915(req)->mm.aliasing_ppgtt;
 
 	if (i915.enable_execlists)
 		return 0;
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 3a23b9549f7b..0789f4581f7d 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -361,8 +361,7 @@ static void execlists_elsp_write(struct drm_i915_gem_request *rq0,
 {
 
 	struct intel_engine_cs *engine = rq0->engine;
-	struct drm_device *dev = engine->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(rq0);
 	uint64_t desc[2];
 
 	if (rq1) {
@@ -616,7 +615,7 @@ static void execlists_context_queue(struct drm_i915_gem_request *request)
 	struct drm_i915_gem_request *cursor;
 	int num_elements = 0;
 
-	if (request->ctx != request->i915->kernel_context)
+	if (request->ctx != to_i915(request)->kernel_context)
 		intel_lr_context_pin(request->ctx, engine);
 
 	i915_gem_request_reference(request);
@@ -712,14 +711,14 @@ int intel_logical_ring_alloc_request_extras(struct drm_i915_gem_request *request
 		 * going any further, as the i915_add_request() call
 		 * later on mustn't fail ...
 		 */
-		struct intel_guc *guc = &request->i915->guc;
+		struct intel_guc *guc = &to_i915(request)->guc;
 
 		ret = i915_guc_wq_check_space(guc->execbuf_client);
 		if (ret)
 			return ret;
 	}
 
-	if (request->ctx != request->i915->kernel_context)
+	if (request->ctx != to_i915(request)->kernel_context)
 		ret = intel_lr_context_pin(request->ctx, request->engine);
 
 	return ret;
@@ -780,7 +779,7 @@ static int
 intel_logical_ring_advance_and_submit(struct drm_i915_gem_request *request)
 {
 	struct intel_ringbuffer *ringbuf = request->ringbuf;
-	struct drm_i915_private *dev_priv = request->i915;
+	struct drm_i915_private *dev_priv = to_i915(request);
 	struct intel_engine_cs *engine = request->engine;
 
 	intel_logical_ring_advance(ringbuf);
@@ -802,7 +801,7 @@ intel_logical_ring_advance_and_submit(struct drm_i915_gem_request *request)
 	if (engine->last_context != request->ctx) {
 		if (engine->last_context)
 			intel_lr_context_unpin(engine->last_context, engine);
-		if (request->ctx != request->i915->kernel_context) {
+		if (request->ctx != to_i915(request)->kernel_context) {
 			intel_lr_context_pin(request->ctx, engine);
 			engine->last_context = request->ctx;
 		} else {
@@ -898,7 +897,7 @@ int intel_logical_ring_begin(struct drm_i915_gem_request *req, int num_dwords)
 	int ret;
 
 	WARN_ON(req == NULL);
-	dev_priv = req->i915;
+	dev_priv = to_i915(req);
 
 	ret = i915_gem_check_wedge(&dev_priv->gpu_error,
 				   dev_priv->mm.interruptible);
@@ -1042,7 +1041,7 @@ void intel_execlists_retire_requests(struct intel_engine_cs *engine)
 		struct drm_i915_gem_object *ctx_obj =
 				ctx->engine[engine->id].state;
 
-		if (ctx_obj && (ctx != req->i915->kernel_context))
+		if (ctx_obj && (ctx != to_i915(req)->kernel_context))
 			intel_lr_context_unpin(ctx, engine);
 
 		list_del(&req->execlist_link);
@@ -1177,8 +1176,7 @@ static int intel_logical_ring_workarounds_emit(struct drm_i915_gem_request *req)
 	int ret, i;
 	struct intel_engine_cs *engine = req->engine;
 	struct intel_ringbuffer *ringbuf = req->ringbuf;
-	struct drm_device *dev = engine->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(req);
 	struct i915_workarounds *w = &dev_priv->workarounds;
 
 	if (w->count == 0)
@@ -1690,8 +1688,8 @@ static int gen8_emit_bb_start(struct drm_i915_gem_request *req,
 	 * not needed in 48-bit.*/
 	if (req->ctx->ppgtt &&
 	    (intel_engine_flag(req->engine) & req->ctx->ppgtt->pd_dirty_rings)) {
-		if (!USES_FULL_48BIT_PPGTT(req->i915) &&
-		    !intel_vgpu_active(req->i915->dev)) {
+		if (!USES_FULL_48BIT_PPGTT(req) &&
+		    !intel_vgpu_active(to_i915(req)->dev)) {
 			ret = intel_logical_ring_emit_pdps(req);
 			if (ret)
 				return ret;
diff --git a/drivers/gpu/drm/i915/intel_mocs.c b/drivers/gpu/drm/i915/intel_mocs.c
index 45200b93e9bb..9aa3d8750d97 100644
--- a/drivers/gpu/drm/i915/intel_mocs.c
+++ b/drivers/gpu/drm/i915/intel_mocs.c
@@ -327,7 +327,7 @@ int intel_rcs_context_init_mocs(struct drm_i915_gem_request *req)
 		enum intel_engine_id ring_id;
 
 		/* Program the control registers */
-		for_each_engine(engine, req->i915, ring_id) {
+		for_each_engine(engine, req, ring_id) {
 			ret = emit_mocs_control_table(req, &t, ring_id);
 			if (ret)
 				return ret;
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 521cf4564329..46e2fdda6101 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -7385,8 +7385,7 @@ static void __intel_rps_boost_work(struct work_struct *work)
 	struct drm_i915_gem_request *req = boost->req;
 
 	if (!i915_gem_request_completed(req, true))
-		gen6_rps_boost(to_i915(req->engine->dev), NULL,
-			       req->emitted_jiffies);
+		gen6_rps_boost(to_i915(req), NULL, req->emitted_jiffies);
 
 	i915_gem_request_unreference__unlocked(req);
 	kfree(boost);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index f981bddc9bbf..8a293a25588c 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -107,7 +107,6 @@ gen4_render_ring_flush(struct drm_i915_gem_request *req,
 		       u32	flush_domains)
 {
 	struct intel_engine_cs *engine = req->engine;
-	struct drm_device *dev = engine->dev;
 	u32 cmd;
 	int ret;
 
@@ -146,7 +145,7 @@ gen4_render_ring_flush(struct drm_i915_gem_request *req,
 		cmd |= MI_EXE_FLUSH;
 
 	if (invalidate_domains & I915_GEM_DOMAIN_COMMAND &&
-	    (IS_G4X(dev) || IS_GEN5(dev)))
+	    (IS_G4X(req) || IS_GEN5(req)))
 		cmd |= MI_INVALIDATE_ISP;
 
 	ret = intel_ring_begin(req, 2);
@@ -705,8 +704,7 @@ static int intel_ring_workarounds_emit(struct drm_i915_gem_request *req)
 {
 	int ret, i;
 	struct intel_engine_cs *engine = req->engine;
-	struct drm_device *dev = engine->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(req);
 	struct i915_workarounds *w = &dev_priv->workarounds;
 
 	if (w->count == 0)
@@ -1272,12 +1270,11 @@ static int gen8_rcs_signal(struct drm_i915_gem_request *signaller_req,
 {
 #define MBOX_UPDATE_DWORDS 8
 	struct intel_engine_cs *signaller = signaller_req->engine;
-	struct drm_device *dev = signaller->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(signaller_req);
 	struct intel_engine_cs *waiter;
 	int i, ret, num_rings;
 
-	num_rings = hweight32(INTEL_INFO(dev)->ring_mask);
+	num_rings = hweight32(INTEL_INFO(dev_priv)->ring_mask);
 	num_dwords += (num_rings-1) * MBOX_UPDATE_DWORDS;
 #undef MBOX_UPDATE_DWORDS
 
@@ -1313,12 +1310,11 @@ static int gen8_xcs_signal(struct drm_i915_gem_request *signaller_req,
 {
 #define MBOX_UPDATE_DWORDS 6
 	struct intel_engine_cs *signaller = signaller_req->engine;
-	struct drm_device *dev = signaller->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(signaller_req);
 	struct intel_engine_cs *waiter;
 	int i, ret, num_rings;
 
-	num_rings = hweight32(INTEL_INFO(dev)->ring_mask);
+	num_rings = hweight32(INTEL_INFO(dev_priv)->ring_mask);
 	num_dwords += (num_rings-1) * MBOX_UPDATE_DWORDS;
 #undef MBOX_UPDATE_DWORDS
 
@@ -1351,13 +1347,12 @@ static int gen6_signal(struct drm_i915_gem_request *signaller_req,
 		       unsigned int num_dwords)
 {
 	struct intel_engine_cs *signaller = signaller_req->engine;
-	struct drm_device *dev = signaller->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(signaller_req);
 	struct intel_engine_cs *useless;
 	int i, ret, num_rings;
 
 #define MBOX_UPDATE_DWORDS 3
-	num_rings = hweight32(INTEL_INFO(dev)->ring_mask);
+	num_rings = hweight32(INTEL_INFO(dev_priv)->ring_mask);
 	num_dwords += round_up((num_rings-1) * MBOX_UPDATE_DWORDS, 2);
 #undef MBOX_UPDATE_DWORDS
 
@@ -1437,7 +1432,7 @@ gen8_ring_sync(struct drm_i915_gem_request *waiter_req,
 	       u32 seqno)
 {
 	struct intel_engine_cs *waiter = waiter_req->engine;
-	struct drm_i915_private *dev_priv = waiter->dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(waiter_req);
 	int ret;
 
 	ret = intel_ring_begin(waiter_req, 4);
@@ -2372,8 +2367,8 @@ int intel_engine_idle(struct intel_engine_cs *engine)
 
 	/* Make sure we do not trigger any retires */
 	return __i915_wait_request(req,
-				   atomic_read(&to_i915(engine->dev)->gpu_error.reset_counter),
-				   to_i915(engine->dev)->mm.interruptible,
+				   atomic_read(&to_i915(req)->gpu_error.reset_counter),
+				   to_i915(req)->mm.interruptible,
 				   NULL, NULL);
 }
 
@@ -2501,7 +2496,7 @@ int intel_ring_begin(struct drm_i915_gem_request *req,
 
 	WARN_ON(req == NULL);
 	engine = req->engine;
-	dev_priv = req->i915;
+	dev_priv = to_i915(req);
 
 	ret = i915_gem_check_wedge(&dev_priv->gpu_error,
 				   dev_priv->mm.interruptible);
@@ -2600,7 +2595,7 @@ static int gen6_bsd_ring_flush(struct drm_i915_gem_request *req,
 		return ret;
 
 	cmd = MI_FLUSH_DW;
-	if (INTEL_INFO(engine->dev)->gen >= 8)
+	if (INTEL_INFO(req)->gen >= 8)
 		cmd += 1;
 
 	/* We always require a command barrier so that subsequent
@@ -2622,7 +2617,7 @@ static int gen6_bsd_ring_flush(struct drm_i915_gem_request *req,
 	intel_ring_emit(engine, cmd);
 	intel_ring_emit(engine,
 			I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
-	if (INTEL_INFO(engine->dev)->gen >= 8) {
+	if (INTEL_INFO(req)->gen >= 8) {
 		intel_ring_emit(engine, 0); /* upper addr */
 		intel_ring_emit(engine, 0); /* value */
 	} else  {
@@ -2639,7 +2634,7 @@ gen8_ring_dispatch_execbuffer(struct drm_i915_gem_request *req,
 			      unsigned dispatch_flags)
 {
 	struct intel_engine_cs *engine = req->engine;
-	bool ppgtt = USES_PPGTT(engine->dev) &&
+	bool ppgtt = USES_PPGTT(req) &&
 			!(dispatch_flags & I915_DISPATCH_SECURE);
 	int ret;
 
@@ -2713,7 +2708,6 @@ static int gen6_ring_flush(struct drm_i915_gem_request *req,
 			   u32 invalidate, u32 flush)
 {
 	struct intel_engine_cs *engine = req->engine;
-	struct drm_device *dev = engine->dev;
 	uint32_t cmd;
 	int ret;
 
@@ -2722,7 +2716,7 @@ static int gen6_ring_flush(struct drm_i915_gem_request *req,
 		return ret;
 
 	cmd = MI_FLUSH_DW;
-	if (INTEL_INFO(dev)->gen >= 8)
+	if (INTEL_INFO(req)->gen >= 8)
 		cmd += 1;
 
 	/* We always require a command barrier so that subsequent
@@ -2743,7 +2737,7 @@ static int gen6_ring_flush(struct drm_i915_gem_request *req,
 	intel_ring_emit(engine, cmd);
 	intel_ring_emit(engine,
 			I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
-	if (INTEL_INFO(dev)->gen >= 8) {
+	if (INTEL_INFO(req)->gen >= 8) {
 		intel_ring_emit(engine, 0); /* upper addr */
 		intel_ring_emit(engine, 0); /* value */
 	} else  {
-- 
2.8.0.rc3

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