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: 602559 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64E90ECAAD1 for ; Thu, 1 Sep 2022 13:54:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234073AbiIANyn (ORCPT ); Thu, 1 Sep 2022 09:54:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47332 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234065AbiIANym (ORCPT ); Thu, 1 Sep 2022 09:54:42 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1645120190 for ; Thu, 1 Sep 2022 06:54:40 -0700 (PDT) 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: Sender: Russell King Date: Thu, 01 Sep 2022 14:54:35 +0100 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.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) --- 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_ */