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From: Jason Ekstrand <jason@jlekstrand.net>
To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Cc: Jason Ekstrand <jason@jlekstrand.net>
Subject: [PATCH 25/25] drm/i915/gem: Roll all of context creation together
Date: Thu, 29 Apr 2021 14:03:40 -0500	[thread overview]
Message-ID: <20210429190340.1555632-26-jason@jlekstrand.net> (raw)
In-Reply-To: <20210429190340.1555632-1-jason@jlekstrand.net>

Now that we have the whole engine set and VM at context creation time,
we can just assign those fields instead of creating first and handling
the VM and engines later.  This lets us avoid creating useless VMs and
engine sets and lets us git rid of the complex VM setting code.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
---
 drivers/gpu/drm/i915/gem/i915_gem_context.c   | 159 ++++++------------
 .../gpu/drm/i915/gem/selftests/mock_context.c |  33 ++--
 2 files changed, 64 insertions(+), 128 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index dd066b5009fe7..dc44bdd1fa348 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -1204,56 +1204,6 @@ static int __context_set_persistence(struct i915_gem_context *ctx, bool state)
 	return 0;
 }
 
-static struct i915_gem_context *
-__create_context(struct drm_i915_private *i915,
-		 const struct i915_gem_proto_context *pc)
-{
-	struct i915_gem_context *ctx;
-	struct i915_gem_engines *e;
-	int err;
-	int i;
-
-	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
-	if (!ctx)
-		return ERR_PTR(-ENOMEM);
-
-	kref_init(&ctx->ref);
-	ctx->i915 = i915;
-	ctx->sched = pc->sched;
-	mutex_init(&ctx->mutex);
-	INIT_LIST_HEAD(&ctx->link);
-
-	spin_lock_init(&ctx->stale.lock);
-	INIT_LIST_HEAD(&ctx->stale.engines);
-
-	mutex_init(&ctx->engines_mutex);
-	e = default_engines(ctx);
-	if (IS_ERR(e)) {
-		err = PTR_ERR(e);
-		goto err_free;
-	}
-	RCU_INIT_POINTER(ctx->engines, e);
-
-	INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
-	mutex_init(&ctx->lut_mutex);
-
-	/* NB: Mark all slices as needing a remap so that when the context first
-	 * loads it will restore whatever remap state already exists. If there
-	 * is no remap info, it will be a NOP. */
-	ctx->remap_slice = ALL_L3_SLICES(i915);
-
-	ctx->user_flags = pc->user_flags;
-
-	for (i = 0; i < ARRAY_SIZE(ctx->hang_timestamp); i++)
-		ctx->hang_timestamp[i] = jiffies - CONTEXT_FAST_HANG_JIFFIES;
-
-	return ctx;
-
-err_free:
-	kfree(ctx);
-	return ERR_PTR(err);
-}
-
 static inline struct i915_gem_engines *
 __context_engines_await(const struct i915_gem_context *ctx,
 			bool *user_engines)
@@ -1297,86 +1247,77 @@ context_apply_all(struct i915_gem_context *ctx,
 	i915_sw_fence_complete(&e->fence);
 }
 
-static void __apply_ppgtt(struct intel_context *ce, void *vm)
-{
-	i915_vm_put(ce->vm);
-	ce->vm = i915_vm_get(vm);
-}
-
-static struct i915_address_space *
-__set_ppgtt(struct i915_gem_context *ctx, struct i915_address_space *vm)
-{
-	struct i915_address_space *old;
-
-	old = rcu_replace_pointer(ctx->vm,
-				  i915_vm_open(vm),
-				  lockdep_is_held(&ctx->mutex));
-	GEM_BUG_ON(old && i915_vm_is_4lvl(vm) != i915_vm_is_4lvl(old));
-
-	context_apply_all(ctx, __apply_ppgtt, vm);
-
-	return old;
-}
-
-static void __assign_ppgtt(struct i915_gem_context *ctx,
-			   struct i915_address_space *vm)
-{
-	if (vm == rcu_access_pointer(ctx->vm))
-		return;
-
-	vm = __set_ppgtt(ctx, vm);
-	if (vm)
-		i915_vm_close(vm);
-}
-
 static struct i915_gem_context *
 i915_gem_create_context(struct drm_i915_private *i915,
 			const struct i915_gem_proto_context *pc)
 {
 	struct i915_gem_context *ctx;
-	int ret;
+	struct i915_gem_engines *e;
+	int err;
+	int i;
 
-	ctx = __create_context(i915, pc);
-	if (IS_ERR(ctx))
-		return ctx;
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return ERR_PTR(-ENOMEM);
 
-	if (pc->vm) {
-		mutex_lock(&ctx->mutex);
-		__assign_ppgtt(ctx, pc->vm);
-		mutex_unlock(&ctx->mutex);
-	}
+	kref_init(&ctx->ref);
+	ctx->i915 = i915;
+	ctx->sched = pc->sched;
+	mutex_init(&ctx->mutex);
+	INIT_LIST_HEAD(&ctx->link);
 
-	if (pc->num_user_engines >= 0) {
-		struct i915_gem_engines *engines;
+	spin_lock_init(&ctx->stale.lock);
+	INIT_LIST_HEAD(&ctx->stale.engines);
 
-		engines = user_engines(ctx, pc->num_user_engines,
-				       pc->user_engines);
-		if (IS_ERR(engines)) {
-			context_close(ctx);
-			return ERR_CAST(engines);
-		}
+	if (pc->vm)
+		RCU_INIT_POINTER(ctx->vm, i915_vm_open(pc->vm));
 
-		mutex_lock(&ctx->engines_mutex);
+	mutex_init(&ctx->engines_mutex);
+	if (pc->num_user_engines >= 0) {
 		i915_gem_context_set_user_engines(ctx);
-		engines = rcu_replace_pointer(ctx->engines, engines, 1);
-		mutex_unlock(&ctx->engines_mutex);
-
-		free_engines(engines);
+		e = user_engines(ctx, pc->num_user_engines, pc->user_engines);
+	} else {
+		i915_gem_context_clear_user_engines(ctx);
+		e = default_engines(ctx);
+	}
+	if (IS_ERR(e)) {
+		err = PTR_ERR(e);
+		goto err_vm;
 	}
+	RCU_INIT_POINTER(ctx->engines, e);
+
+	INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
+	mutex_init(&ctx->lut_mutex);
+
+	/* NB: Mark all slices as needing a remap so that when the context first
+	 * loads it will restore whatever remap state already exists. If there
+	 * is no remap info, it will be a NOP. */
+	ctx->remap_slice = ALL_L3_SLICES(i915);
+
+	ctx->user_flags = pc->user_flags;
+
+	for (i = 0; i < ARRAY_SIZE(ctx->hang_timestamp); i++)
+		ctx->hang_timestamp[i] = jiffies - CONTEXT_FAST_HANG_JIFFIES;
 
 	if (pc->single_timeline) {
-		ret = drm_syncobj_create(&ctx->syncobj,
+		err = drm_syncobj_create(&ctx->syncobj,
 					 DRM_SYNCOBJ_CREATE_SIGNALED,
 					 NULL);
-		if (ret) {
-			context_close(ctx);
-			return ERR_PTR(ret);
-		}
+		if (err)
+			goto err_engines;
 	}
 
 	trace_i915_context_create(ctx);
 
 	return ctx;
+
+err_engines:
+	free_engines(e);
+err_vm:
+	if (ctx->vm)
+		i915_vm_close(ctx->vm);
+	kfree(ctx);
+	return ERR_PTR(err);
 }
 
 static void init_contexts(struct i915_gem_contexts *gc)
diff --git a/drivers/gpu/drm/i915/gem/selftests/mock_context.c b/drivers/gpu/drm/i915/gem/selftests/mock_context.c
index 0a2a6f64965b6..3aeec20b80c27 100644
--- a/drivers/gpu/drm/i915/gem/selftests/mock_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/mock_context.c
@@ -30,15 +30,6 @@ mock_context(struct drm_i915_private *i915,
 
 	i915_gem_context_set_persistence(ctx);
 
-	mutex_init(&ctx->engines_mutex);
-	e = default_engines(ctx);
-	if (IS_ERR(e))
-		goto err_free;
-	RCU_INIT_POINTER(ctx->engines, e);
-
-	INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
-	mutex_init(&ctx->lut_mutex);
-
 	if (name) {
 		struct i915_ppgtt *ppgtt;
 
@@ -46,25 +37,29 @@ mock_context(struct drm_i915_private *i915,
 
 		ppgtt = mock_ppgtt(i915, name);
 		if (!ppgtt)
-			goto err_put;
-
-		mutex_lock(&ctx->mutex);
-		__set_ppgtt(ctx, &ppgtt->vm);
-		mutex_unlock(&ctx->mutex);
+			goto err_free;
 
+		ctx->vm = i915_vm_open(&ppgtt->vm);
 		i915_vm_put(&ppgtt->vm);
 	}
 
+	mutex_init(&ctx->engines_mutex);
+	e = default_engines(ctx);
+	if (IS_ERR(e))
+		goto err_vm;
+	RCU_INIT_POINTER(ctx->engines, e);
+
+	INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
+	mutex_init(&ctx->lut_mutex);
+
 	return ctx;
 
+err_vm:
+	if (ctx->vm)
+		i915_vm_close(ctx->vm);
 err_free:
 	kfree(ctx);
 	return NULL;
-
-err_put:
-	i915_gem_context_set_closed(ctx);
-	i915_gem_context_put(ctx);
-	return NULL;
 }
 
 void mock_context_close(struct i915_gem_context *ctx)
-- 
2.31.1

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      parent reply	other threads:[~2021-04-29 19:04 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-29 19:03 [PATCH 00/25] drm/i915/gem: ioctl clean-ups (v4) Jason Ekstrand
2021-04-29 19:03 ` [PATCH 01/25] drm/i915: Drop I915_CONTEXT_PARAM_RINGSIZE Jason Ekstrand
2021-04-29 19:03 ` [PATCH 02/25] drm/i915: Stop storing the ring size in the ring pointer Jason Ekstrand
2021-04-29 19:03 ` [PATCH 03/25] drm/i915: Drop I915_CONTEXT_PARAM_NO_ZEROMAP Jason Ekstrand
2021-04-29 19:03 ` [PATCH 04/25] drm/i915/gem: Set the watchdog timeout directly in intel_context_set_gem (v2) Jason Ekstrand
2021-04-29 19:03 ` [PATCH 05/25] drm/i915/gem: Return void from context_apply_all Jason Ekstrand
2021-04-29 19:03 ` [PATCH 06/25] drm/i915: Drop the CONTEXT_CLONE API Jason Ekstrand
2021-04-29 19:03 ` [PATCH 07/25] drm/i915: Implement SINGLE_TIMELINE with a syncobj (v4) Jason Ekstrand
2021-04-29 19:03 ` [PATCH 08/25] drm/i915: Drop getparam support for I915_CONTEXT_PARAM_ENGINES Jason Ekstrand
2021-04-29 19:03 ` [PATCH 09/25] drm/i915/gem: Disallow bonding of virtual engines (v3) Jason Ekstrand
2021-04-29 19:03 ` [PATCH 10/25] drm/i915/gem: Remove engine auto-magic with FENCE_SUBMIT Jason Ekstrand
2021-04-29 19:03 ` [PATCH 11/25] drm/i915/request: Remove the hook from await_execution Jason Ekstrand
2021-04-29 19:03 ` [PATCH 12/25] drm/i915/gem: Disallow creating contexts with too many engines Jason Ekstrand
2021-04-29 19:03 ` [PATCH 13/25] drm/i915: Stop manually RCU banging in reset_stats_ioctl (v2) Jason Ekstrand
2021-04-29 19:03 ` [PATCH 14/25] drm/i915/gem: Add a separate validate_priority helper Jason Ekstrand
2021-04-29 19:03 ` [PATCH 15/25] drm/i915: Add gem/i915_gem_context.h to the docs Jason Ekstrand
2021-04-29 19:03 ` [PATCH 16/25] drm/i915/gem: Add an intermediate proto_context struct Jason Ekstrand
2021-04-29 19:03 ` [PATCH 17/25] drm/i915/gem: Use the proto-context to handle create parameters Jason Ekstrand
2021-04-29 19:03 ` [PATCH 18/25] drm/i915/gem: Return an error ptr from context_lookup Jason Ekstrand
2021-04-29 19:03 ` [PATCH 19/25] drm/i915/gt: Drop i915_address_space::file (v2) Jason Ekstrand
2021-04-29 19:03 ` [PATCH 20/25] drm/i915/gem: Delay context creation Jason Ekstrand
2021-04-29 19:03 ` [PATCH 21/25] drm/i915/gem: Don't allow changing the VM on running contexts Jason Ekstrand
2021-04-29 19:03 ` [PATCH 22/25] drm/i915/gem: Don't allow changing the engine set " Jason Ekstrand
2021-04-29 19:03 ` [PATCH 23/25] drm/i915/selftests: Take a VM in kernel_context() Jason Ekstrand
2021-04-29 19:03 ` [PATCH 24/25] i915/gem/selftests: Assign the VM at context creation in igt_shared_ctx_exec Jason Ekstrand
2021-04-29 19:03 ` Jason Ekstrand [this message]

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