From nobody Fri Dec 19 08:09:37 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 7FE1EE71D46 for ; Fri, 29 Sep 2023 15:03:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233522AbjI2PDk (ORCPT ); Fri, 29 Sep 2023 11:03:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44922 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233442AbjI2PDZ (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 475A41BB for ; Fri, 29 Sep 2023 08:03:22 -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 3996CDA7; Fri, 29 Sep 2023 08:04:00 -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 D75F33F5A1; Fri, 29 Sep 2023 08:03:20 -0700 (PDT) From: Sudeep Holla Date: Fri, 29 Sep 2023 16:02:55 +0100 Subject: [PATCH v3 06/17] firmware: arm_ffa: Implement the FFA_NOTIFICATION_GET interface MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230929-ffa_v1-1_notif-v3-6-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=2442; i=sudeep.holla@arm.com; h=from:subject:message-id; bh=WcMcF7+EWspNtIEKv7vhK+PdYzYtK3Hl6T1/APp/RSo=; b=owEBbQKS/ZANAwAIAQBBurwxfuKYAcsmYgBlFucv9DdfP5qDeC0S7ZKdLh/2EacPtt+fAel+o gzGvF/3OYaJAjMEAAEIAB0WIQS6ceUSBvMeskPdk+EAQbq8MX7imAUCZRbnLwAKCRAAQbq8MX7i mGymD/9pOqUOteL/bKSdzoY3NQCakLGj4XiCROjEievu5tUdHy0Zb3ttZk2FNhwO0U4GTs+zN7q JMY1pBn0Whe/TMy9uoR6QMHY6DydUrmxF8i/Xbg7acJwrYzP/EKGbHrD6nHsIzaw0fbVrZTqC5W LrCV8D0042hPxLhPqFuOrSa8Wi2xtDsE9HI0rV41qzg28H6SKgJnGLwavnGvlpsiAb9hjeNrrBC eO2ZS/vJ+VoZ10DcHBJrmOCXPVkzVM1KSd9nkazpTsP4Gg4NxFIQLNiCA24RT29pJm1F6Mz+1cZ qxPRFroeIabsRziknlj+JG2p/ezP4ZysriTfCWnUeZUIQAqxn5d1Xop+gz2dWqS5sg8ZkdHy9wa Waq9Ys3Mn/bEwq+JCFTqrN0bDJsdtsddVA/rahCLcpDrl0WoLDP1zmJlhf0JfD+JVEia/yhQ8Rn 9mWF/AJvGd8/xdy+e/iL76A+H34ZXxNZ5rP2/QmxJC3Ph2encmrjrISyXwXhuAzNwk9084Fa9ES 2rgkFA6HujhRSgn1MhgUDkGDnUJmLF57TS0LBZvuWspwiK7WEqM2G/sl2VN6ihtJIvaKqDfVSf5 dZm5IZsQJyr2LqWGDrPh+MiyyQMfHZ5qsHsD1tF2uccVe9AukepEBy0x29Bi6VSTfwjyt1PkpTd 9T/z+j/ZK2XvPBQ== 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 receiver to determine the identity of the notification. A receiver endpoint must use the FFA_NOTIFICATION_GET interface to retrieve its pending notifications and handle them. Add the support for FFA_NOTIFICATION_GET to allow the caller(receiver) to fetch its pending notifications from other partitions in the system. Signed-off-by: Sudeep Holla --- drivers/firmware/arm_ffa/driver.c | 37 +++++++++++++++++++++++++++++++++++= ++ 1 file changed, 37 insertions(+) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/d= river.c index b0d1ddfe0230..02eedb7bc171 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -593,6 +593,14 @@ static int ffa_notification_bitmap_destroy(void) ((u32)(FIELD_GET(NOTIFICATION_HIGH_MASK, (x)))) #define NOTIFICATION_BITMAP_LOW(x) \ ((u32)(FIELD_GET(NOTIFICATION_LOW_MASK, (x)))) +#define PACK_NOTIFICATION_BITMAP(low, high) \ + (FIELD_PREP(NOTIFICATION_LOW_MASK, (low)) | \ + FIELD_PREP(NOTIFICATION_HIGH_MASK, (high))) + +#define RECEIVER_VCPU_MASK GENMASK(31, 16) +#define PACK_NOTIFICATION_GET_RECEIVER_INFO(vcpu_r, r) \ + (FIELD_PREP(RECEIVER_VCPU_MASK, (vcpu_r)) | \ + FIELD_PREP(RECEIVER_ID_MASK, (r))) =20 static int ffa_notification_bind_common(u16 dst_id, u64 bitmap, u32 flags, bool is_bind) @@ -636,6 +644,35 @@ int ffa_notification_set(u16 src_id, u16 dst_id, u32 f= lags, u64 bitmap) return 0; } =20 +struct ffa_notify_bitmaps { + u64 sp_map; + u64 vm_map; + u64 arch_map; +}; + +static int ffa_notification_get(u32 flags, struct ffa_notify_bitmaps *noti= fy) +{ + ffa_value_t ret; + u16 src_id =3D drv_info->vm_id; + u16 cpu_id =3D smp_processor_id(); + u32 rec_vcpu_ids =3D PACK_NOTIFICATION_GET_RECEIVER_INFO(cpu_id, src_id); + + invoke_ffa_fn((ffa_value_t){ + .a0 =3D FFA_NOTIFICATION_GET, .a1 =3D rec_vcpu_ids, .a2 =3D flags, + }, &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; /* Something else went wrong. */ + + notify->sp_map =3D PACK_NOTIFICATION_BITMAP(ret.a2, ret.a3); + notify->vm_map =3D PACK_NOTIFICATION_BITMAP(ret.a4, ret.a5); + notify->arch_map =3D PACK_NOTIFICATION_BITMAP(ret.a6, ret.a7); + + return 0; +} + static int ffa_run(struct ffa_device *dev, u16 vcpu) { ffa_value_t ret; --=20 2.42.0