From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C46C32D24A2 for ; Fri, 29 Aug 2025 22:42:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756507345; cv=none; b=Z4TXz/Gx+M9mNm7nxtLrouAiVKyYYtxEpmu5GqF3tswmXT+h0t/bLTmADkzBvOITV7CtuWQije1pWwQE+cchrjjcxpT0Bsm3ERrkAfPGL7FgUyob3ZK+JWOZhI3gMitFyGOZIv4oH1EvW6uWGj8TYmktTfnNi0r1g6PlRyicK3M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756507345; c=relaxed/simple; bh=OlP8MYcLYn8B4Ppd94bua5MQUc1xpc8AUyxsAK6NMps=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jtvuzlvVIWPzpqSFb0hQQJmG9CL5HyUYyyN9rqeDVoW3TXYrD0QurskdwyCnrEQeOXRlfZ032ouNaWYPxnqPkgix2KQQaRuKJATjloaBDU1ZzJZaYyCXNjvSwddFeaGN2rLQKXhawWZU4CYr08pqEzM4d6sn3Vkpo7QxkvxPVNA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=ZMqqznWW; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZMqqznWW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756507342; 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=yXnTUIqS+LiZwSLAb4BzQOkRqLb5m0E0Ss24acMrZZE=; b=ZMqqznWWECjQnsRL7c4MVe0EdIT2+jrD6GjGkgiFZStpKPVKgTbXPVHlp8b3WbcUTWVI/S eF7TD2QvjDAoInnJrP3FYmPQu6trv+ui1T0R+BBVtbP6i52ivV8SkGQtfhq8H+5SikNfq4 pnTqLOP89ivjtpBVndvxNVRKk/GVWPo= Received: from mx-prod-mc-03.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-36-CMFgr5AvMk-4CX6S-X9AhA-1; Fri, 29 Aug 2025 18:42:18 -0400 X-MC-Unique: CMFgr5AvMk-4CX6S-X9AhA-1 X-Mimecast-MFC-AGG-ID: CMFgr5AvMk-4CX6S-X9AhA_1756507335 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (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-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6069719560B5; Fri, 29 Aug 2025 22:42:15 +0000 (UTC) Received: from chopper.redhat.com (unknown [10.22.80.78]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 558801800280; Fri, 29 Aug 2025 22:42:10 +0000 (UTC) From: Lyude Paul To: dri-devel@lists.freedesktop.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org Cc: David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Sumit Semwal , =?UTF-8?q?Christian=20K=C3=B6nig?= , Daniel Almeida , Asahi Lina , linux-media@vger.kernel.org (open list:DMA BUFFER SHARING FRAMEWORK:Keyword:\bdma_(?:buf|fence|resv)\b), linaro-mm-sig@lists.linaro.org (moderated list:DMA BUFFER SHARING FRAMEWORK:Keyword:\bdma_(?:buf|fence|resv)\b) Subject: [PATCH v3 06/14] rust: drm: gem: Add raw_dma_resv() function Date: Fri, 29 Aug 2025 18:35:21 -0400 Message-ID: <20250829224116.477990-7-lyude@redhat.com> In-Reply-To: <20250829224116.477990-1-lyude@redhat.com> References: <20250829224116.477990-1-lyude@redhat.com> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 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 --- 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 ec36cd9ea69ed..f901d4263ee87 100644 --- a/rust/kernel/drm/gem/mod.rs +++ b/rust/kernel/drm/gem/mod.rs @@ -186,6 +186,18 @@ 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 -- 2.50.0