From patchwork Thu Sep 1 13:54:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 12962702 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 4055BECAAD3 for ; Thu, 1 Sep 2022 13:56:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Date:Message-Id:MIME-Version:Subject:Cc :To:From:References:In-Reply-To:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=1Uq+BOfygnuSRhusVL1X7X1NfucFdr10xLnVXtsBHx4=; b=CMiNAy6JLQqxoB u0YPDlaA/sLXeXyZj3GcpDow3yvCkRy1sgUFtQTxS+npxxbjZ+3JZ/15QBoa6RsO1SvxINkhe+FJj V1tpzVUHxWfvTPH7dNsVX4+O07HNszOq5EkVEEQxzOKv3GSqe17+caHKmoXbwNodWb314zmpkajit bYOmpmwY7pMFpO0bvtoWcNzoB4t54U/wU03GOu5NniBzcM+ulI287oPWR7//sZS85/DWhoulh115m IgIkbbiceb4e5VbfpnVyU+udlv9GRRRPOuNoRsuOgUZ+9chAaDoaIkqKqliQ7a/ii+grnbftqhFt7 GPD5/GSEqno5uO9fMICw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTkfE-00CFUr-Qb; Thu, 01 Sep 2022 13:55:25 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTkeU-00CF8J-4K for linux-arm-kernel@lists.infradead.org; Thu, 01 Sep 2022 13:54:39 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To: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=zyU/s3SljPR5PhLbvgtX6PueXWeHUUBpW9mxXVc6RjY=; b=KJfq6mYKuSbYxdudTLedUx0mCt BunHdgABCzFEUZYVsP4LkpRi0N+fzdJGrx2X7nwO7FtlyMGvFpaECsfPnTYzNFAaiiLBKviYn72IN dpgC7ogcbz88KV6w8hNka2XIPXTbQe4wC4n27i5jiHZDKigY4kf0aTFYMX2w6o/OTx6kwG1Ppe9lP ULpFep7r2vbnMDkCYiVMmXMAVxutgs++7kaQy4vnkMuCUPVEhGW+iP4UFq0xlYu57WvhCqOdPlWBR WvAM0dhbIVvXw7ApRqve4EDd7SaAyceJZ5gQ5QEPEfpNGTPW03mD1BL3YXnaf3CqT1yFVFWY+ZXN1 AgSBmT6g==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:50894 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oTkeR-0005wa-UV; Thu, 01 Sep 2022 14:54:35 +0100 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1oTkeR-003t9R-BK; Thu, 01 Sep 2022 14:54:35 +0100 In-Reply-To: References: From: Russell King (Oracle) To: Arnd Bergmann , Lee Jones , Linus Walleij Cc: Alyssa Rosenzweig , asahi@lists.linux.dev, Bartosz Golaszewski , Hector Martin , linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, Sven Peter Subject: [PATCH 3/6] soc: apple: rtkit: Add apple_rtkit_poll MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Thu, 01 Sep 2022 14:54:35 +0100 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220901_065438_212360_65208900 X-CRM114-Status: UNSURE ( 9.24 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Hector Martin This allows a client to receive messages in atomic context, by polling. Signed-off-by: Hector Martin Signed-off-by: Russell King (Oracle) Reviewed-by: Sven Peter Reviewed-by: Eric Curtin --- drivers/soc/apple/rtkit.c | 6 ++++++ include/linux/soc/apple/rtkit.h | 12 ++++++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c index cf1129e9f76b..031ec4aa06d5 100644 --- a/drivers/soc/apple/rtkit.c +++ b/drivers/soc/apple/rtkit.c @@ -660,6 +660,12 @@ int apple_rtkit_send_message_wait(struct apple_rtkit *rtk, u8 ep, u64 message, } EXPORT_SYMBOL_GPL(apple_rtkit_send_message_wait); +int apple_rtkit_poll(struct apple_rtkit *rtk) +{ + return mbox_client_peek_data(rtk->mbox_chan); +} +EXPORT_SYMBOL_GPL(apple_rtkit_poll); + int apple_rtkit_start_ep(struct apple_rtkit *rtk, u8 endpoint) { u64 msg; diff --git a/include/linux/soc/apple/rtkit.h b/include/linux/soc/apple/rtkit.h index 88eb832eac7b..c9cabb679cd1 100644 --- a/include/linux/soc/apple/rtkit.h +++ b/include/linux/soc/apple/rtkit.h @@ -152,4 +152,16 @@ int apple_rtkit_send_message(struct apple_rtkit *rtk, u8 ep, u64 message, int apple_rtkit_send_message_wait(struct apple_rtkit *rtk, u8 ep, u64 message, unsigned long timeout, bool atomic); +/* + * Process incoming messages in atomic context. + * This only guarantees that messages arrive as far as the recv_message_early + * callback; drivers expecting to handle incoming messages synchronously + * by calling this function must do it that way. + * Will return 1 if some data was processed, 0 if none was, or a + * negative error code on failure. + * + * @rtk: RTKit reference + */ +int apple_rtkit_poll(struct apple_rtkit *rtk); + #endif /* _LINUX_APPLE_RTKIT_H_ */