From patchwork Fri Jan 10 19:29:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 11328327 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 23ABA6C1 for ; Fri, 10 Jan 2020 19:29:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 01FF02087F for ; Fri, 10 Jan 2020 19:29:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="OGSVvCge" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728752AbgAJT3W (ORCPT ); Fri, 10 Jan 2020 14:29:22 -0500 Received: from mail25.static.mailgun.info ([104.130.122.25]:40497 "EHLO mail25.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728452AbgAJT3W (ORCPT ); Fri, 10 Jan 2020 14:29:22 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1578684561; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=EHK7ZOIjToT9khxX7iSgvPJgRfkrf/0cdN7Y+Xvfzcw=; b=OGSVvCgevWNKsm5ez8hd5WkLZ9yhaUWrEkYQ3bXfbt6lE3LotgB6PzcUp230wNnGdOokJNjx v2xTK6Duor+bRR7mDmr0eSBIe8M/0A+ri7CmkOJ+iLnIjcUSlUKrs4hGMzQZZMtFth2p6BKj 5Yje41uo7XA/KzkU6xnkt9WxanE= X-Mailgun-Sending-Ip: 104.130.122.25 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e18d090.7f1488644dc0-smtp-out-n03; Fri, 10 Jan 2020 19:29:20 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 1C700C4479F; Fri, 10 Jan 2020 19:29:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from eberman-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: eberman) by smtp.codeaurora.org (Postfix) with ESMTPSA id 12C10C43383; Fri, 10 Jan 2020 19:29:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 12C10C43383 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=eberman@codeaurora.org From: Elliot Berman To: Mark Rutland , Lorenzo Pieralisi , Sudeep Holla Cc: Elliot Berman , Bjorn Andersson , tsoni@codeaurora.org, psodagud@codeaurora.org, linux-arm-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC] drivers: firmware: psci: Add function to support SYSTEM_RESET2 Date: Fri, 10 Jan 2020 11:29:12 -0800 Message-Id: <1578684552-15953-2-git-send-email-eberman@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578684552-15953-1-git-send-email-eberman@codeaurora.org> References: <1578684552-15953-1-git-send-email-eberman@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Make SYSTEM_RESET2 command part of its own function which client drivers may also invoke to support vendor-specific reset types. Signed-off-by: Elliot Berman --- drivers/firmware/psci/psci.c | 16 +++++++++++++++- include/linux/psci.h | 3 +++ include/uapi/linux/psci.h | 8 ++++++++ 3 files changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c index b3b6c15..338e4be 100644 --- a/drivers/firmware/psci/psci.c +++ b/drivers/firmware/psci/psci.c @@ -220,6 +220,15 @@ static unsigned long psci_migrate_info_up_cpu(void) 0, 0, 0); } +int psci_system_reset2(const u32 reset_type, const unsigned long cookie) +{ + if (!psci_system_reset2_supported) + return -EOPNOTSUPP; + return invoke_psci_fn(PSCI_FN_NATIVE(1_1, SYSTEM_RESET2), reset_type, + cookie, 0); +} +EXPORT_SYMBOL_GPL(psci_system_reset2); + static void set_conduit(enum arm_smccc_conduit conduit) { switch (conduit) { @@ -267,7 +276,12 @@ static void psci_sys_reset(enum reboot_mode reboot_mode, const char *cmd) * reset_type[30:0] = 0 (SYSTEM_WARM_RESET) * cookie = 0 (ignored by the implementation) */ - invoke_psci_fn(PSCI_FN_NATIVE(1_1, SYSTEM_RESET2), 0, 0, 0); + psci_system_reset2( + PSCI_1_1_SYSTEM_RESET2_SYSTEM_WARM_RESET | + (PSCI_1_1_SYSTEM_RESET2_TYPE_ARCHITECTURE << + PSCI_1_1_SYSTEM_RESET2_SHIFT), + 0 + ); } else { invoke_psci_fn(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0); } diff --git a/include/linux/psci.h b/include/linux/psci.h index ebe0a88..9479952 100644 --- a/include/linux/psci.h +++ b/include/linux/psci.h @@ -41,8 +41,11 @@ extern struct psci_operations psci_ops; #if defined(CONFIG_ARM_PSCI_FW) int __init psci_dt_init(void); +int psci_system_reset2(const u32 reset_type, const unsigned long cookie); #else static inline int psci_dt_init(void) { return 0; } +static inline int psci_system_reset2(const u32 reset_type, + const unsigned long cookie) { return -ENODEV; } #endif #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI) diff --git a/include/uapi/linux/psci.h b/include/uapi/linux/psci.h index 2fcad1d..42edbd7 100644 --- a/include/uapi/linux/psci.h +++ b/include/uapi/linux/psci.h @@ -72,6 +72,14 @@ #define PSCI_1_0_EXT_POWER_STATE_TYPE_MASK \ (0x1 << PSCI_1_0_EXT_POWER_STATE_TYPE_SHIFT) +/* PSCI SYSTEM_RESET2 reset_type argument */ +#define PSCI_1_1_SYSTEM_RESET2_SYSTEM_WARM_RESET 0x0 +#define PSCI_1_1_SYSTEM_RESET2_TYPE_VENDOR 1 +#define PSCI_1_1_SYSTEM_RESET2_TYPE_ARCHITECTURE 0 +#define PSCI_1_1_SYSTEM_RESET2_TYPE_SHIFT 30 +#define PSCI_1_1_SYSTEM_RESET2_TYPE_MASK \ + (0x1 << PSCI_1_1_SYSTEM_RESET2_TYPE_SHIFT) + /* PSCI v0.2 affinity level state returned by AFFINITY_INFO */ #define PSCI_0_2_AFFINITY_LEVEL_ON 0 #define PSCI_0_2_AFFINITY_LEVEL_OFF 1