From mboxrd@z Thu Jan 1 00:00:00 1970 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 49E5BEE6B6A for ; Fri, 6 Feb 2026 22:35:36 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 87EF010E951; Fri, 6 Feb 2026 22:35:35 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="G+S/WFOA"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id F2F3410E94D for ; Fri, 6 Feb 2026 22:35:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1770417333; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4YK+4HwwquBYeIuxYMPDw1j2BgvfAbpgHtDrxAyiwYs=; b=G+S/WFOAZfUeYv4dCfxPJ8kTP2F6YeNUll2/8Jd/fQYDXlUzBv/nHTV9RjJxQ1b73YHnXD HQI6jQgAJdjWOwo4LJ7bRpRlhUJhniEFQPPtwd/PpFt+HK6OjOcWmsVdrgfmJeoYTDTxL4 xc9L5hKstNeLXiiraiKYXssUU6QAfLU= Received: from mx-prod-mc-05.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-269-oAs-S85qMCSvgldeCpQXPg-1; Fri, 06 Feb 2026 17:35:30 -0500 X-MC-Unique: oAs-S85qMCSvgldeCpQXPg-1 X-Mimecast-MFC-AGG-ID: oAs-S85qMCSvgldeCpQXPg_1770417328 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id AB00A1956095; Fri, 6 Feb 2026 22:35:28 +0000 (UTC) Received: from GoldenWind.redhat.com (unknown [10.22.64.226]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id B9647192C7C3; Fri, 6 Feb 2026 22:35:26 +0000 (UTC) From: Lyude Paul To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, rust-for-linux@vger.kernel.org, Danilo Krummrich Cc: nouveau@lists.freedesktop.org, Daniel Almeida , Gary Guo , Benno Lossin , Alexandre Courbot , Janne Grunau Subject: [PATCH v7 1/7] rust: drm: gem: Add raw_dma_resv() function Date: Fri, 6 Feb 2026 17:34:25 -0500 Message-ID: <20260206223431.693765-2-lyude@redhat.com> In-Reply-To: <20260206223431.693765-1-lyude@redhat.com> References: <20260206223431.693765-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-MFC-PROC-ID: 40Fv6FWZVw0Tr4yN8HFx14eQg62mJW8B9PnqeitPzBg_1770417328 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true 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" For retrieving a pointer to the struct dma_resv for a given GEM object. We also introduce it in a new trait, BaseObjectPrivate, which we automatically implement for all gem objects and don't expose to users outside of the crate. Signed-off-by: Lyude Paul Reviewed-by: Janne Grunau --- rust/kernel/drm/gem/mod.rs | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/rust/kernel/drm/gem/mod.rs b/rust/kernel/drm/gem/mod.rs index e1cc3af8ade9b..82b3151e5ae3b 100644 --- a/rust/kernel/drm/gem/mod.rs +++ b/rust/kernel/drm/gem/mod.rs @@ -197,6 +197,18 @@ fn create_mmap_offset(&self) -> Result { impl BaseObject for T {} +/// Crate-private base operations shared by all GEM object classes. +#[expect(unused)] +pub(crate) trait BaseObjectPrivate: IntoGEMObject { + /// Return a pointer to this object's dma_resv. + fn raw_dma_resv(&self) -> *mut bindings::dma_resv { + // SAFETY: `as_gem_obj()` always returns a valid pointer to the base DRM gem object + unsafe { (*self.as_raw()).resv } + } +} + +impl BaseObjectPrivate for T {} + /// A base GEM object. /// /// # Invariants -- 2.53.0