From nobody Fri Dec 19 09:45:03 2025 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 531A3E92728 for ; Thu, 5 Oct 2023 16:05:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237380AbjJEQFB (ORCPT ); Thu, 5 Oct 2023 12:05:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234464AbjJEQDY (ORCPT ); Thu, 5 Oct 2023 12:03:24 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 44EFA9ED2 for ; Thu, 5 Oct 2023 07:45:38 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 86B101516; Thu, 5 Oct 2023 07:45:53 -0700 (PDT) Received: from e103737-lin.cambridge.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D0B8D3F641; Thu, 5 Oct 2023 07:45:13 -0700 (PDT) From: Sudeep Holla Date: Thu, 05 Oct 2023 15:44:58 +0100 Subject: [PATCH v4 05/17] firmware: arm_ffa: Implement the FFA_NOTIFICATION_SET interface MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20231005-ffa_v1-1_notif-v4-5-cddd3237809c@arm.com> References: <20231005-ffa_v1-1_notif-v4-0-cddd3237809c@arm.com> In-Reply-To: <20231005-ffa_v1-1_notif-v4-0-cddd3237809c@arm.com> To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sudeep Holla , Marc Bonnici , Jens Wiklander , Coboy Chen , Lorenzo Pieralisi , Olivier Deprez X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1504; i=sudeep.holla@arm.com; h=from:subject:message-id; bh=4q7IiagFj1+jcbEerM+tVmHVjhNoYEy9g+TfTOniWJY=; b=owEBbQKS/ZANAwAIAQBBurwxfuKYAcsmYgBlHsvxU+OC43JQZl2rh/aQ5hxCbL/2rnY6mISRn pGTv/huwB2JAjMEAAEIAB0WIQS6ceUSBvMeskPdk+EAQbq8MX7imAUCZR7L8QAKCRAAQbq8MX7i mONFD/91SNwLzgvbqoev7AcemtwFwEIcUq5ymafJb0GYsSNhSIHyE2Fc0QDnD5JgTQvF8Ww7bCa MyrtPbAxmPj+VkfD75JZmgXC7v0nVPjZ69uR+7D2kP2PxNOFiz2q0HCYkpTe6MumZGA4a+xWlrW il9Rc3Ylp2GYlRp/k4nA+JIhTSoqlqo4p+2Mzr52ESdNQrMyqiPIXM+qjcL13Tlb922K0ZfoNJd ElfDaqGRnnn/6yMZGzItAbsp3BnOXpjZtv4s1ogVe9+P+5RCwTGSrx4J1LM2lD71mQKB2ibjp2R OmErG7UrdKtHSNkfII9fiAffYeIJ++KnBX/1KWzpoRS7ssxnSy42bsi1DxKYUrbuTKLHC3brOxw 1hU8XanUC/u+SxI4ciJ+xpVxxBfdGP0aQQ65qwfgyTAKFNka9IYXK2mDCHjVg51VqEV0Mr8IlK1 VoggYkLvIFjuDM4mdGSf3Hi40v2Jvw2vNmCc05bXgg8re0mkLkdb9QgPbnmtE7y1cQeMiz8PxgL iuvKwiuOc0AFBXYA/pJlKmV3mGH47ffFqhOvSxDGcdYqIG/uh41kL6g+S381gOSz7VPfG/S4ZXS W3YPGIu6toky30eaLCxxby8VqYvn2IRsTMMcrh/6BZmuSXm27BykzpyPoIA9iDds6LVrS+okCZK +vJMXWVolUaXsHw== X-Developer-Key: i=sudeep.holla@arm.com; a=openpgp; fpr=7360A21742ADF5A11767C1C139CFD4755FE2D5B4 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The framework provides an interface to the sender to specify the notification to signal to the receiver. A sender signals a notification by requesting its partition manager to set the corresponding bit in the notifications bitmap of the receiver invoking FFA_NOTIFICATION_SET. Implement the FFA_NOTIFICATION_SET to enable the caller(sender) to send the notifications for any other partitions in the system. Signed-off-by: Sudeep Holla --- drivers/firmware/arm_ffa/driver.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/d= river.c index 82e54d231074..4edb3cb48014 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -616,6 +616,26 @@ static int ffa_notification_bind_common(u16 dst_id, u6= 4 bitmap, return 0; } =20 +static +int ffa_notification_set(u16 src_id, u16 dst_id, u32 flags, u64 bitmap) +{ + ffa_value_t ret; + u32 src_dst_ids =3D PACK_TARGET_INFO(dst_id, src_id); + + invoke_ffa_fn((ffa_value_t) { + .a0 =3D FFA_NOTIFICATION_SET, .a1 =3D src_dst_ids, .a2 =3D flags, + .a3 =3D NOTIFICATION_BITMAP_LOW(bitmap), + .a4 =3D NOTIFICATION_BITMAP_HIGH(bitmap), + }, &ret); + + if (ret.a0 =3D=3D FFA_ERROR) + return ffa_to_linux_errno((int)ret.a2); + else if (ret.a0 !=3D FFA_SUCCESS) + return -EINVAL; + + return 0; +} + static int ffa_run(struct ffa_device *dev, u16 vcpu) { ffa_value_t ret; --=20 2.42.0