From mboxrd@z Thu Jan 1 00:00:00 1970 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 6B359ECAAA1 for ; Tue, 30 Aug 2022 10:12:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230096AbiH3KMT (ORCPT ); Tue, 30 Aug 2022 06:12:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229827AbiH3KLu (ORCPT ); Tue, 30 Aug 2022 06:11:50 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 93CA6EA14F for ; Tue, 30 Aug 2022 03:07:33 -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 DBCE31474; Tue, 30 Aug 2022 03:07:38 -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 81EEF3F766; Tue, 30 Aug 2022 03:07:31 -0700 (PDT) From: Sudeep Holla To: linux-kernel@vger.kernel.org, op-tee@lists.trustedfirmware.org Cc: Sudeep Holla , Marc Bonnici , Achin Gupta , Jens Wiklander , Valentin Laurent , Lukas Hanel , Coboy Chen Subject: [PATCH 4/9] firmware: arm_ffa: Add support for querying FF-A features Date: Tue, 30 Aug 2022 11:06:55 +0100 Message-Id: <20220830100700.344594-5-sudeep.holla@arm.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220830100700.344594-1-sudeep.holla@arm.com> References: <20220830100700.344594-1-sudeep.holla@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add support for FFA_FEATURES to discover properties supported at the FF-A interface. This interface can be used to query: - If an FF-A interface is implemented by the component at the higher EL, - If an implemented FF-A interface also implements any optional features described in its interface definition, and - Any implementation details exported by an implemented FF-A interface as described in its interface definition. Signed-off-by: Sudeep Holla --- drivers/firmware/arm_ffa/driver.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 04e7cbb1b9aa..de94073f4109 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -571,6 +571,29 @@ static int ffa_memory_reclaim(u64 g_handle, u32 flags) return 0; } +static int ffa_features(u32 func_feat_id, u32 input_props, u32 *if_props) +{ + ffa_value_t id; + + if (!ARM_SMCCC_IS_FAST_CALL(func_feat_id) && input_props) { + pr_err("%s: Invalid Parameters: %x, %x", __func__, + func_feat_id, input_props); + return ffa_to_linux_errno(FFA_RET_INVALID_PARAMETERS); + } + + invoke_ffa_fn((ffa_value_t){ + .a0 = FFA_FEATURES, .a1 = func_feat_id, .a2 = input_props, + }, &id); + + if (id.a0 == FFA_ERROR) + return ffa_to_linux_errno((int)id.a2); + + if (if_props) + *if_props = id.a2; + + return 0; +} + static u32 ffa_api_version_get(void) { return drv_info->version; -- 2.37.2