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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 57715C433F5 for ; Fri, 28 Jan 2022 08:56:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233872AbiA1I4o (ORCPT ); Fri, 28 Jan 2022 03:56:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49768 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229847AbiA1I4n (ORCPT ); Fri, 28 Jan 2022 03:56:43 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F647C061714 for ; Fri, 28 Jan 2022 00:56:43 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 7B80BB824EF for ; Fri, 28 Jan 2022 08:56:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B317AC340E0; Fri, 28 Jan 2022 08:56:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643360200; bh=L0e4NOI8iG8yDPknydOzu7XKjt3ExbCSSt6U9t2mwlE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=pdortB5pJt7xqL4W8flMRwt4+3nBc6nX2GmXa31LWVMwz3ZEucgJaChv2CTimRTDq dLWleVTLlmb8shrU97yRAOCl0NSvhsIq2n3rfhH61EcT/BNao1tStg9QSvYQqrlQm+ W+Md3VSLEBn6uB3Wf/kV+Fjq+8qkkluMCjKbnWgrVaz3PWbamdRz4+t9pGe3mgs3uB kQZ0tOdni1n8dZBafj+mqXM/6COPoShqg3tBMl3AKdqbk8PzbMoT4MWdccUR8NWwB7 ZTuFA2hhP9LJXgWnKjQaAIFV1Uc828CkgXrDZuzYEImSXnJ+aYSoMRsPANEjrkB+FF sBq144hBLoqeA== Date: Fri, 28 Jan 2022 16:56:34 +0800 From: Shawn Guo To: "Peng Fan (OSS)" Cc: s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Peng Fan Subject: Re: [PATCH] firmware: imx: add get resource owner api Message-ID: <20220128085633.GG4686@dragon> References: <20220111032147.342012-1-peng.fan@oss.nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220111032147.342012-1-peng.fan@oss.nxp.com> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 11, 2022 at 11:21:47AM +0800, Peng Fan (OSS) wrote: > From: Peng Fan > > Add resource owner management API, this API could be used to check > whether M4 is under control of Linux. > > Signed-off-by: Peng Fan > --- > drivers/firmware/imx/rm.c | 45 +++++++++++++++++++++++++++++ > include/linux/firmware/imx/svc/rm.h | 5 ++++ > 2 files changed, 50 insertions(+) > > diff --git a/drivers/firmware/imx/rm.c b/drivers/firmware/imx/rm.c > index a12db6ff323b..3c3605f98123 100644 > --- a/drivers/firmware/imx/rm.c > +++ b/drivers/firmware/imx/rm.c > @@ -43,3 +43,48 @@ bool imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource) > return hdr->func; > } > EXPORT_SYMBOL(imx_sc_rm_is_resource_owned); > + > +/* > + * This function get @resource partition number > + * > + * @param[in] ipc IPC handle > + * @param[in] resource resource the control is associated with > + * @param[out] pt pointer to return the partition number > + * > + * @return Returns 0 for success and < 0 for errors. > + */ Shouldn't the documentation be put right above the function? Shawn > +struct imx_sc_msg_rm_get_resource_owner { > + struct imx_sc_rpc_msg hdr; > + union { > + struct { > + u16 resource; > + } req; > + struct { > + u8 val; > + } resp; > + } data; > +} __packed __aligned(4); > + > +int imx_sc_rm_get_resource_owner(struct imx_sc_ipc *ipc, u16 resource, u8 *pt) > +{ > + struct imx_sc_msg_rm_get_resource_owner msg; > + struct imx_sc_rpc_msg *hdr = &msg.hdr; > + int ret; > + > + hdr->ver = IMX_SC_RPC_VERSION; > + hdr->svc = IMX_SC_RPC_SVC_RM; > + hdr->func = IMX_SC_RM_FUNC_GET_RESOURCE_OWNER; > + hdr->size = 2; > + > + msg.data.req.resource = resource; > + > + ret = imx_scu_call_rpc(ipc, &msg, true); > + if (ret) > + return ret; > + > + if (pt) > + *pt = msg.data.resp.val; > + > + return 0; > +} > +EXPORT_SYMBOL(imx_sc_rm_get_resource_owner); > diff --git a/include/linux/firmware/imx/svc/rm.h b/include/linux/firmware/imx/svc/rm.h > index 456b6a59d29b..ff481b23ea36 100644 > --- a/include/linux/firmware/imx/svc/rm.h > +++ b/include/linux/firmware/imx/svc/rm.h > @@ -59,11 +59,16 @@ enum imx_sc_rm_func { > > #if IS_ENABLED(CONFIG_IMX_SCU) > bool imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource); > +int imx_sc_rm_get_resource_owner(struct imx_sc_ipc *ipc, u16 resource, u8 *pt); > #else > static inline bool > imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource) > { > return true; > } > +static inline int imx_sc_rm_get_resource_owner(struct imx_sc_ipc *ipc, u16 resource, u8 *pt) > +{ > + return -ENOTSUPP; > +} > #endif > #endif > -- > 2.25.1 >