From patchwork Thu Oct 5 14:44:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 13410156 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 BE6E5E92706 for ; Thu, 5 Oct 2023 14:45:49 +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:To:In-Reply-To:References:Message-Id: MIME-Version:Subject:Date:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=CJWM3+wIQ9p6Adya6K98zvHx9PkODHmTgOKhucoPK8k=; b=ZzSRfN28K1Jzm7 6rlFYZVHA1lzXLWysnibTCWpZ4Wgq6kgwyggMSWYsn63Dr7v7e/FeE/Fo/Z3v0phd7pVmqXsR9E26 GSJB6o1eteB0Py7ZLHmTmDPwt5pdbu4u4e8+sEv+QNO2n2nJ2vxmlxZqS2lKDGYVyk+9NBlEWJ+eQ wirRNypz/2ZIZfw2BTR90LCLy8FR4YEC3bOeweu66Y3p6UnI+Zxy/xN9eeC8rFO1HxDDyv483M6hO bIxJloq4OAK3uQXTKMN0QeMY4Hjl2ZcFKNmtj/W+bx901caaoCwREV+a7IdG4xmFpOfhWcAylSeWk IuQdGOtwXuyUnYgHBkGQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qoPbM-003lcy-08; Thu, 05 Oct 2023 14:45:20 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qoPbF-003laI-08 for linux-arm-kernel@lists.infradead.org; Thu, 05 Oct 2023 14:45:14 +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 23273150C; Thu, 5 Oct 2023 07:45:51 -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 6D3DD3F641; Thu, 5 Oct 2023 07:45:11 -0700 (PDT) From: Sudeep Holla Date: Thu, 05 Oct 2023 15:44:56 +0100 Subject: [PATCH v4 03/17] firmware: arm_ffa: Implement the notification bind and unbind interface MIME-Version: 1.0 Message-Id: <20231005-ffa_v1-1_notif-v4-3-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=2207; i=sudeep.holla@arm.com; h=from:subject:message-id; bh=tCh7LbKeNAevFd5uQSx03qEkiVl/aQEeXvD/r/UF4UU=; b=owEBbQKS/ZANAwAIAQBBurwxfuKYAcsmYgBlHsvwFDa1dLaZiLdaBoo+tK3/uFpNRlVXwQfJU v79YnQB7lKJAjMEAAEIAB0WIQS6ceUSBvMeskPdk+EAQbq8MX7imAUCZR7L8AAKCRAAQbq8MX7i mLWQD/wLXEyJRAXmNV7481V9rRrEOHvJ36UfKSIWMkvKASOA5tN91M1Orlf6679gmfJJDBvv8SP X8CpzgeqIgLndGOcvlgUc6sKgXdT2QHLzGMqSlp1zh6NNBzuH0CCY9YjZ+CGIHBB+vWPPL47OQR VcuIKfuU9VXpea+xynjlRpwkoqgjz/YGTSL19m3GOfUW6GSzopPt0aAVibxZK7PQBGRnqYbKMcO NkgOexysE6f9G4lhGDOJfhErVsR4D3jNpMh5UZfLxCi1Jd7Ehjxo8qT2SmQQ9Kf79rwsRbGakpv j/sU7v5lEMsDfKRyJPc9QT+mGcVv4FpPNySXQDWLWk35gS7Vk1hZxkkocYP1z/6HYsJMkhCSsyJ 4mGhqnGr9KiRwMhuUNBBi4vJjI4tXqCP+QahymeH4WfnlAt4P70SMXy4TTadgIPeoloJYQQa298 TG0iIjeHhIsvuVombabM1TmrG5EGsfhwomwXxhzl6KAojYWradn5YXCbOWOfoTJXeueuxfvASH6 p/YqWegmTZ7RtKxys24QRT1RvxOnCj5phnY8nqFHrkicnZL8uiHewpV4UN6yNvPdSdEwEIP96mC jXGiYEKjH2d9OYaTf779pGMbGf6ha1eNRMyOeoa/Vq6iilHIcNcBSoqvxabFOqVMo9FFGz2/BYJ eN6H/Li3w/s+KLw== 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-20231005_074513_177268_497A73E4 X-CRM114-Status: GOOD ( 13.49 ) 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 c2ab6f4cf296..20f8f4ca8e89 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -587,6 +587,35 @@ 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) ||