From patchwork Fri Mar 17 12:12:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ma=C3=ADra_Canal?= X-Patchwork-Id: 13179004 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 CA1B7C74A5B for ; Fri, 17 Mar 2023 12:13:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E69D610EEF4; Fri, 17 Mar 2023 12:13:31 +0000 (UTC) Received: from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56]) by gabe.freedesktop.org (Postfix) with ESMTPS id BB45910EEF4 for ; Fri, 17 Mar 2023 12:13:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=wxlvNLGKgBNmusrXwv5nJvC1jT8zNLs4o63V3Oq55OI=; b=D8fYSVFHxRxkWM8ooaCtJrSslk iYawuRl6Efmm9iNfhGGKGnjSWBepYC0agou6YKRqLPTqodLqxjyH42HfNTn2QKLZbzQheCuIiZqpo uFGU1Zu6mWfGfFxXCogN1Rcs+SjFe7u35jS02p1WHa5NSIBFFHvflP6N1HXi7GpS4Qs8lnZWq5bKS n045cp1UUxElZqZdHAePrQhYAJSHSEfKDtOUo0EBiqOkIxqB3vHov1SKbn8IUDCrTSUQBD8UJym3y vqrsjn8+TqetKivDqwQ9i93DRneKt1yA7Rtu1Wcac8fQ29/MTIKPXF+tcEccLbLZz6gyy8qLR4jOJ Sn4pX8xg==; Received: from [177.34.168.16] (helo=bowie..) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1pd8xS-00FrGz-J4; Fri, 17 Mar 2023 13:13:19 +0100 From: =?utf-8?q?Ma=C3=ADra_Canal?= To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Miguel Ojeda , Alex Gaynor , Wedson Almeida Filho , Boqun Feng , Gary Guo , Asahi Lina , Faith Ekstrand Subject: [RFC PATCH 4/9] rust: dma_fence: expose the fence's seqno publically Date: Fri, 17 Mar 2023 09:12:08 -0300 Message-Id: <20230317121213.93991-5-mcanal@igalia.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230317121213.93991-1-mcanal@igalia.com> References: <20230317121213.93991-1-mcanal@igalia.com> MIME-Version: 1.0 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: , Cc: Melissa Wen , =?utf-8?q?Ma=C3=ADra_Canal?= , dri-devel@lists.freedesktop.org, rust-for-linux@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Each fence has a linear increasing sequence number inside the execution context, that can be used to decide which fence would be signaled later. So, expose this attribute to the Rust drivers through a method. Signed-off-by: Maíra Canal --- rust/kernel/dma_fence.rs | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/rust/kernel/dma_fence.rs b/rust/kernel/dma_fence.rs index 176e6d250e6c..94fead520274 100644 --- a/rust/kernel/dma_fence.rs +++ b/rust/kernel/dma_fence.rs @@ -60,6 +60,13 @@ pub trait RawDmaFence: crate::private::Sealed { } } + /// Return the seqno from this fence + fn seqno(&self) -> u64 { + // SAFETY: We hold a reference to a dma_fence and every dma_fence holds + // a seqno. + unsafe { (*self.raw()).seqno } + } + /// Signal completion of this fence fn signal(&self) -> Result { to_result(unsafe { bindings::dma_fence_signal(self.raw()) })