From nobody Sat Feb 14 03:28:04 2026 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 86EBECE79A9 for ; Tue, 19 Sep 2023 17:41:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232085AbjISRlo (ORCPT ); Tue, 19 Sep 2023 13:41:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55080 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232210AbjISRla (ORCPT ); Tue, 19 Sep 2023 13:41:30 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id AF4CCAD for ; Tue, 19 Sep 2023 10:41:24 -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 E6D40143D; Tue, 19 Sep 2023 10:42:01 -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 9A08E3F5A1; Tue, 19 Sep 2023 10:41:23 -0700 (PDT) From: Sudeep Holla Date: Tue, 19 Sep 2023 18:40:53 +0100 Subject: [PATCH RFT v2 05/18] 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: <20230919-ffa_v1-1_notif-v2-5-6f3a3ca3923c@arm.com> References: <20230919-ffa_v1-1_notif-v2-0-6f3a3ca3923c@arm.com> In-Reply-To: <20230919-ffa_v1-1_notif-v2-0-6f3a3ca3923c@arm.com> To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sudeep Holla , Jens Wiklander , Marc Bonnici , 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=PMF7W8gP08NmJpWmNAG8MEfkwerfmt6TtimmzyfxT6Q=; b=owEBbQKS/ZANAwAIAQBBurwxfuKYAcsmYgBlCd062+rtFD+44yL0Ekw5PGXXJ+O+CH2hxDgPl oo7XyQZC7+JAjMEAAEIAB0WIQS6ceUSBvMeskPdk+EAQbq8MX7imAUCZQndOgAKCRAAQbq8MX7i mMz3D/978oazRdsQBQ1CfVAgN3UMUwEFY2s+U2EOyTnNCCkLb08bn2TmY2Ul4Q8yulS8Z/d1yEF ryXH87x53jlhDFOUOoVxQWBx1ZGsYXbWr9SS4uc17T8VTQPZ/Yj2Zs7m5ErtJn7kJ3vgOvYJUY2 mko5cDfNqAzdB9dHEXdTaO3FcKFaYlTFU+W003LnYIh8Yo29I16e1YgasLGcuvalBfGOcdVedRM 66m2ZXyT+gYg0Hj4mjPR08uYczTQJgSQWVPvL818HDQP6VRABdd3SS2NqKK4B/dajuzs2Ox05yI l92A8zoQSSgjnmj8DJ84mDGx0GdX+cOaDDrUfBsYKo0E84BeCoJOctELSMOWEpwt03n07/nBW6L /h9ttmhBiv4Nq73pxfn6MhR9PswwrFy5N7VYXb4Kn2DhqcQdcAn2DHcWBgfWGVA5l16L0VzNOrF ncBqYr9daRg8RsR0RYjMju005j/a1mKUKWUEiA94M/KfwPvs7PMKu6/GL2I08ZbO+ptfevIEVC3 j4a7B6ZQBSL657Jsi3TuCDcqH5kEO9zMVI3KqciVFyfvoChioz64DaksuJWS8YTN1i4mzG2yyYq bq3dMS2llQLJnJsMyS6kB4t6bRwZHST1A/iI05lAn9t/kk8RNFkPVsCYjnvVnTTcjJ7mfR37Zx/ MKPBzzt1GqU5hqw== 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 ebe1ecc57099..2aae838ba46a 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -604,6 +604,26 @@ 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(src_id, dst_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