From patchwork Mon Sep 30 23:10:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lyude Paul X-Patchwork-Id: 13817284 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BB009CEB2CD for ; Mon, 30 Sep 2024 23:41:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 38A3B10E5A9; Mon, 30 Sep 2024 23:41:28 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="d5RkNiXC"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 098E710E5A9 for ; Mon, 30 Sep 2024 23:41:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1727739686; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xhLeLvV27GzVDMIsND1hL5s5tE+smtYvQODvZdGLp1k=; b=d5RkNiXCjA6yEhZI6EmQCcKs05346j94IThos2kAb0a5fsl46/EhiVVITRLdn48EvVxSCe SI5fiWTtkEAkm/PgJLie6jLzVRXvK9eQq8zDvot7dBxc9FNVEgSN/GCFJRgqyvaUl5GLrR FqhmQX/98vnbV4VUowi4p0vBwd1sgas= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-450-JvvOGLywPfqNFpiwe3YSlg-1; Mon, 30 Sep 2024 19:41:22 -0400 X-MC-Unique: JvvOGLywPfqNFpiwe3YSlg-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (unknown [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 800D1194511A; Mon, 30 Sep 2024 23:41:20 +0000 (UTC) Received: from chopper.redhat.com (unknown [10.22.32.36]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id AA03A3003DEC; Mon, 30 Sep 2024 23:41:16 +0000 (UTC) From: Lyude Paul To: dri-devel@lists.freedesktop.org, rust-for-linux@vger.kernel.org Cc: Asahi Lina , Danilo Krummrich , mcanal@igalia.com, airlied@redhat.com, zhiw@nvidia.com, cjia@nvidia.com, jhubbard@nvidia.com, Miguel Ojeda , Alex Gaynor , Wedson Almeida Filho , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , linux-kernel@vger.kernel.org (open list) Subject: [WIP RFC v2 31/35] rust: drm: Add Device::event_lock() Date: Mon, 30 Sep 2024 19:10:14 -0400 Message-ID: <20240930233257.1189730-32-lyude@redhat.com> In-Reply-To: <20240930233257.1189730-1-lyude@redhat.com> References: <20240930233257.1189730-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This is just a crate-private helper to use Lock::from_raw() to provide an immutable reference to the DRM event_lock, so that it can be used like a normal rust spinlock. We'll need this for adding vblank related bindings. Signed-off-by: Lyude Paul --- rust/kernel/drm/device.rs | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/rust/kernel/drm/device.rs b/rust/kernel/drm/device.rs index d4d6b1185f6a6..207e7ea87cf8f 100644 --- a/rust/kernel/drm/device.rs +++ b/rust/kernel/drm/device.rs @@ -15,6 +15,7 @@ error::from_err_ptr, error::Result, types::{ARef, AlwaysRefCounted, ForeignOwnable, Opaque}, + sync::*, }; use core::{ ffi::c_void, @@ -159,6 +160,12 @@ pub fn data(&self) -> ::Borrowed<'_> { unsafe { ::from_foreign(drm.raw_data()) }; } + /// Returns a reference to the `event` spinlock + pub(crate) fn event_lock(&self) -> &SpinLockIrq<()> { + // SAFETY: `event_lock` is initialized for as long as `self` is exposed to users + unsafe { SpinLockIrq::from_raw(&mut (*self.as_raw()).event_lock) } + } + pub(crate) const fn has_kms() -> bool { ::MODE_CONFIG_OPS.is_some() }