From patchwork Thu Aug 3 19:02:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 13340786 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 46057C04FDF for ; Thu, 3 Aug 2023 19:03:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5bYETkqJb4BsfFL2eQLNqd9ZTE+ezWJoWoxqiLvq5qg=; b=Maw5mu3t07nrOv bdbNHCqMkbW67bqdkL3/WSP+HTuz1BHJpJPlBG62XV570ipw5T2f7NXlN27BdEcyOj++9fTYkdIVw v60DseWl9QBdKTqutb4QvfdKSUh9p8aaYkLY29KFTvhqOVXU1Iz5sJx75PrHWS1RpcOV3smI+re6c KknOx1pT9w+7moEoWFp8KR29NeD8jM0Le48dbzVEVP8RzC4yyx48xpfHgD5AursF9eCVe4O72U8wd TQBeKJj/lTf3FJ36lcWKi4yxtMoHQ/E75ulGcCo6lVMQ8o6hro3sd7l4fT8nUp9g9fz7h2KiXJ1Rz 5Edg4rUamZhCB0nhlidg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qRdak-00AgyV-0P; Thu, 03 Aug 2023 19:02:34 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qRdad-00Agtw-1n for linux-arm-kernel@lists.infradead.org; Thu, 03 Aug 2023 19:02:31 +0000 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 CD5111477; Thu, 3 Aug 2023 12:03:08 -0700 (PDT) Received: from usa.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B17223F6C4; Thu, 3 Aug 2023 12:02:24 -0700 (PDT) From: Sudeep Holla To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Sudeep Holla , Jens Wiklander , Lucian Paul-Trifu , Marc Bonnici , Coboy Chen Subject: [PATCH RFT 03/12] firmware: arm_ffa: Implement the notification bind and unbind interface Date: Thu, 3 Aug 2023 20:02:07 +0100 Message-ID: <20230803-ffa_v1-1_notif-v1-3-6613ff2b1f81@arm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230803-ffa_v1-1_notif-v1-0-6613ff2b1f81@arm.com> References: <20230803-ffa_v1-1_notif-v1-0-6613ff2b1f81@arm.com> MIME-Version: 1.0 X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=2207; i=sudeep.holla@arm.com; h=from:subject:message-id; bh=3OYEZ9E7vpg3yPFg1J667JzF5mZtHS9nU/hUd6LN5Ks=; b=owEBbQKS/ZANAwAIAQBBurwxfuKYAcsmYgBky/iMR7qOL9Zi5z8RhAxhVfjJVsHMbQnTx3Ufe 4oIltWTY5yJAjMEAAEIAB0WIQS6ceUSBvMeskPdk+EAQbq8MX7imAUCZMv4jAAKCRAAQbq8MX7i mM0jD/9XM2IgcxuAMRlGOA0NjXZYJLOQhVTzf5TLKjbmRV5nA06MK3WxFLrNfdT1gjWqNVSRnni Nc5eASG2Wd4vb8GG9tKcrr3R5/KIuIRXe4VTlX8y8vUpteSeGKdJc9uRq0ZTrZ+xY2iG4tQDNg4 cW8ORBHJ59Aw9K6GYa4nUm6rqo2oMUOqLtY2C037F+fdB4bVUve5abIP0Ztadp/PiRDmzE+RiDY 4hChusP2o+dYakJz9uQPBhnd0MqLw48I/hypdQhEz62FYc/bnhI/TRE0RlwVPFynsRgGFv98m9Q HMOxgJEqE9tW+nXAIn8+Ak75ueajWk2lVTLeTdRIZy/TWhmXMONqxY0OPEIRKK5932viifLPumB uIx6VvwugAnD5m2s5fRObNOxXb7H3b1eMhLBUX/FK9qwltkSON0B39dI7n9mCwvtNPq5KmMZiH+ 3iUp4H0RQfL5PL1Y0kYhv10bYoYZhogcjVoMuXNyzZ9rfqxjeJnO5qKSmNw5P+/Ybl0drjYx1lU kGYpHoP2Gu8Cc9evLhfeZlbthzIxRZ3Mm7cW1i9D084bh2vIAX5O9pJN6thnWwuLTQam5sjr4I9 88PgMAjGkpyfu9tXxApQQV8Oct3Xp3OvisM9Gb52J8zk/CNCOzf7k8x67yYS+48qyViu0OQ0v+N Ko1L7Vlc vChz1UA== X-Developer-Key: i=sudeep.holla@arm.com; a=openpgp; fpr=7360A21742ADF5A11767C1C139CFD4755FE2D5B4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230803_120227_692306_F799AF8C X-CRM114-Status: GOOD ( 14.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org A receiver endpoint must bind a notification to any sender endpoint before the latter can signal the notification to the former. The receiver assigns one or more doorbells to a specific sender. Only the sender can ring these doorbells. A receiver uses the FFA_NOTIFICATION_BIND interface to bind one or more notifications to the sender. A receiver un-binds a notification from a sender endpoint to stop the notification from being signaled. It uses the FFA_NOTIFICATION_UNBIND interface to do this. Allow the FF-A driver to be able to bind and unbind a given notification ID to a specific partition ID. This will be used to register and unregister notification callbacks from the FF-A client drivers. Signed-off-by: Sudeep Holla --- drivers/firmware/arm_ffa/driver.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 022c893c9e06..a76e5d3a2422 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -575,6 +575,35 @@ static int ffa_notification_bitmap_destroy(void) return 0; } +#define NOTIFICATION_LOW_MASK GENMASK(31, 0) +#define NOTIFICATION_HIGH_MASK GENMASK(63, 32) +#define NOTIFICATION_BITMAP_HIGH(x) \ + ((u32)(FIELD_GET(NOTIFICATION_HIGH_MASK, (x)))) +#define NOTIFICATION_BITMAP_LOW(x) \ + ((u32)(FIELD_GET(NOTIFICATION_LOW_MASK, (x)))) + +static int ffa_notification_bind_common(u16 dst_id, u64 bitmap, + u32 flags, bool is_bind) +{ + ffa_value_t ret; + u32 func, src_dst_ids = PACK_TARGET_INFO(dst_id, drv_info->vm_id); + + func = is_bind ? FFA_NOTIFICATION_BIND : FFA_NOTIFICATION_UNBIND; + + invoke_ffa_fn((ffa_value_t){ + .a0 = func, .a1 = src_dst_ids, .a2 = flags, + .a3 = NOTIFICATION_BITMAP_LOW(bitmap), + .a4 = NOTIFICATION_BITMAP_HIGH(bitmap), + }, &ret); + + if (ret.a0 == FFA_ERROR) + return ffa_to_linux_errno((int)ret.a2); + else if (ret.a0 != FFA_SUCCESS) + return -EINVAL; + + return 0; +} + static void ffa_set_up_mem_ops_native_flag(void) { if (!ffa_features(FFA_FN_NATIVE(MEM_LEND), 0, NULL, NULL) ||