All of lore.kernel.org
 help / color / mirror / Atom feed
From: Dave Airlie <airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [PATCH 6/6] amdgpu/dc: use kref for dc_state.
Date: Tue,  3 Oct 2017 12:39:02 +1000	[thread overview]
Message-ID: <20171003023902.5036-7-airlied@gmail.com> (raw)
In-Reply-To: <20171003023902.5036-1-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

From: Dave Airlie <airlied@redhat.com>

I'm not a huge fan of those copying around refcounts bits, might
want to consider alternates, but this should work for now.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c          | 26 +++++++++++------------
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c |  4 ++--
 drivers/gpu/drm/amd/display/dc/inc/core_types.h   |  2 +-
 3 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index c8235b0..e8634b8 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -964,25 +964,25 @@ struct dc_state *dc_create_state(void)
 	if (!context)
 		return NULL;
 
-	atomic_inc(&context->ref_count);
+	kref_init(&context->refcount);
 	return context;
 }
 
 void dc_retain_state(struct dc_state *context)
 {
-	ASSERT(atomic_read(&context->ref_count) > 0);
-	atomic_inc(&context->ref_count);
+	kref_get(&context->refcount);
 }
 
-void dc_release_state(struct dc_state *context)
+static void dc_state_free(struct kref *kref)
 {
-	ASSERT(atomic_read(&context->ref_count) > 0);
-	atomic_dec(&context->ref_count);
+	struct dc_state *context = container_of(kref, struct dc_state, refcount);
+	dc_resource_state_destruct(context);
+	kfree(context);
+}
 
-	if (atomic_read(&context->ref_count) == 0) {
-		dc_resource_state_destruct(context);
-		kfree(context);
-	}
+void dc_release_state(struct dc_state *context)
+{
+	kref_put(&context->refcount, dc_state_free);
 }
 
 static bool is_surface_in_context(
@@ -1566,7 +1566,7 @@ void dc_set_power_state(
 	struct dc *dc,
 	enum dc_acpi_cm_power_state power_state)
 {
-	atomic_t ref_count;
+	struct kref refcount;
 
 	switch (power_state) {
 	case DC_ACPI_CM_POWER_STATE_D0:
@@ -1584,12 +1584,12 @@ void dc_set_power_state(
 		 */
 
 		/* Preserve refcount */
-		ref_count = dc->current_state->ref_count;
+		refcount = dc->current_state->refcount;
 		dc_resource_state_destruct(dc->current_state);
 		memset(dc->current_state, 0,
 				sizeof(*dc->current_state));
 
-		dc->current_state->ref_count = ref_count;
+		dc->current_state->refcount = refcount;
 
 		break;
 	}
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 1832f25..057bfe6 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -2433,7 +2433,7 @@ void dc_resource_state_copy_construct(
 		struct dc_state *dst_ctx)
 {
 	int i, j;
-	atomic_t ref_count = dst_ctx->ref_count;
+	struct kref refcount = dst_ctx->refcount;
 
 	*dst_ctx = *src_ctx;
 
@@ -2456,7 +2456,7 @@ void dc_resource_state_copy_construct(
 	}
 
 	/* context refcount should not be overridden */
-	dst_ctx->ref_count = ref_count;
+	dst_ctx->refcount = refcount;
 
 }
 
diff --git a/drivers/gpu/drm/amd/display/dc/inc/core_types.h b/drivers/gpu/drm/amd/display/dc/inc/core_types.h
index 1a1d322..d786ec4 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/core_types.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/core_types.h
@@ -268,7 +268,7 @@ struct dc_state {
 
 	struct display_clock *dis_clk;
 
-	atomic_t ref_count;
+	struct kref refcount;
 };
 
 #endif /* _CORE_TYPES_H_ */
-- 
2.9.5

_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

  parent reply	other threads:[~2017-10-03  2:39 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-03  2:38 convert dc to using krefs for object reference counts Dave Airlie
     [not found] ` <20171003023902.5036-1-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-03  2:38   ` [PATCH 1/6] amdgpu/dc: convert dc_transfer to use a kref Dave Airlie
     [not found]     ` <20171003023902.5036-2-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-03  7:48       ` Christian König
2017-10-03  2:38   ` [PATCH 2/6] amdgpu/dc: convert dc_gamma to kref reference counting Dave Airlie
2017-10-03  2:38   ` [PATCH 3/6] amdgpu/dc: use kref for dc_plane_state Dave Airlie
2017-10-03  2:39   ` [PATCH 4/6] amdgpu/dc: convert dc_stream_state to kref Dave Airlie
2017-10-03  2:39   ` [PATCH 5/6] amdgpu/dc: convert dc_sink " Dave Airlie
2017-10-03  2:39   ` Dave Airlie [this message]
2017-10-03  7:50   ` convert dc to using krefs for object reference counts Christian König
2017-10-03 21:14   ` Harry Wentland

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20171003023902.5036-7-airlied@gmail.com \
    --to=airlied-re5jqeeqqe8avxtiumwx3w@public.gmane.org \
    --cc=amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.