From nobody Fri Dec 19 08:06:28 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 6DD43E71D40 for ; Fri, 29 Sep 2023 15:03:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233516AbjI2PDh (ORCPT ); Fri, 29 Sep 2023 11:03:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44892 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233409AbjI2PDZ (ORCPT ); Fri, 29 Sep 2023 11:03:25 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D77C71B3 for ; Fri, 29 Sep 2023 08:03:20 -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 0CAAD1FB; Fri, 29 Sep 2023 08:03:59 -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 A9E713F5A1; Fri, 29 Sep 2023 08:03:19 -0700 (PDT) From: Sudeep Holla Date: Fri, 29 Sep 2023 16:02:54 +0100 Subject: [PATCH v3 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: <20230929-ffa_v1-1_notif-v3-5-c8e4f15190c8@arm.com> References: <20230929-ffa_v1-1_notif-v3-0-c8e4f15190c8@arm.com> In-Reply-To: <20230929-ffa_v1-1_notif-v3-0-c8e4f15190c8@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=NVitlqlRV6z20CY5oo4iFS9EKuyldYrTV9XNc0cCWyc=; b=owEBbQKS/ZANAwAIAQBBurwxfuKYAcsmYgBlFucvy4pQu2saUIRdI36LiwoHG6ULgL6RfFRQi fMkLTenBjiJAjMEAAEIAB0WIQS6ceUSBvMeskPdk+EAQbq8MX7imAUCZRbnLwAKCRAAQbq8MX7i mITrEACmc38jc6FrQ9DZH7qAj0dD8/GukHrMcd5qq5SLIcbmUX61YipNeM7Kd2ppRcbWZ/xGm2Q AulqjS6eYgOY2h27Rp5bcyYpVlxp23XO9No+SELhluA0oG9uwlJXihjfG2/RbtQxbV5d0gQ59d8 Ttd797Cq5/SSIQzAl98HZfRFnTBPv/gGN7yyIA92eJis8mpuW1jJcj4vPlooG9cqkE4Eb2aoraM agoNF6JPVw+qDCNyJKNq6igaw0zHlQzrT2Hv0OFuX88eHjZb9dtGaTRJ0saCtj/GC3G4LcD89qG ekKeFQL8jxcZQHCbSbcZ4CSUsFBe+NRTiNi7bvObHMlQgjPiF7Ucy9rX36ReR7iLh5suRXBd59g iMzZK2zKs3EKXnM5W31d2iT4pKgVgvSBhkF/diAH01uAXX9x4/cVVQ8n2Ji4tPajh/R9eNOSPIy c3NAvTm09R7x6E6YYE8b1gthZ9fiCiueKuyk7Dk8NhPHzyGVJn3ECcGVgO94aiH4rQmkZhrSORs vEsxUZiHHw+rYa1UOp0hmp12I2QBFv6nfY6nDdyWKnOmR0dAPVffO2OjvAPk0Z+xTRkZtK931JS gfZwD0xyCQPB6XHe9G52fWY6Dqr5puzKz5qDATddMmVtAx1Q6kM3/10UMRYla3G6kO623MzgD3r I/j4tJUpRtZIDAg== 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 b265063e76ea..b0d1ddfe0230 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