From patchwork Mon Jul 13 14:09:58 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shilpasri G Bhat X-Patchwork-Id: 494590 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 45FC91402E2 for ; Tue, 14 Jul 2015 00:14:56 +1000 (AEST) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 2B3B21A1BD3 for ; Tue, 14 Jul 2015 00:14:56 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from ozlabs.org (ozlabs.org [103.22.144.67]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 924731A19A4 for ; Tue, 14 Jul 2015 00:11:23 +1000 (AEST) Received: by ozlabs.org (Postfix) id 82B471402E2; Tue, 14 Jul 2015 00:11:23 +1000 (AEST) Delivered-To: linuxppc-dev@ozlabs.org Received: from e23smtp04.au.ibm.com (e23smtp04.au.ibm.com [202.81.31.146]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 6F0EC1402D7 for ; Tue, 14 Jul 2015 00:11:23 +1000 (AEST) Received: from /spool/local by e23smtp04.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 14 Jul 2015 00:11:19 +1000 X-Helo: d23dlp02.au.ibm.com X-MailFrom: shilpa.bhat@linux.vnet.ibm.com X-RcptTo: linuxppc-dev@ozlabs.org Received: from d23relay07.au.ibm.com (d23relay07.au.ibm.com [9.190.26.37]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id 26ED32BB0040 for ; Tue, 14 Jul 2015 00:11:19 +1000 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay07.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t6DEBC6V4718904 for ; Tue, 14 Jul 2015 00:11:20 +1000 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t6DEAkMx009732 for ; Tue, 14 Jul 2015 00:10:46 +1000 Received: from localhost.in.ibm.com ([9.77.199.59]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t6DEAa9Z008971; Tue, 14 Jul 2015 00:10:44 +1000 From: Shilpasri G Bhat To: rjw@rjwysocki.net Subject: [PATCH v4 2/6] powerpc/powernv: Add definition of OPAL_MSG_OCC message type Date: Mon, 13 Jul 2015 19:39:58 +0530 Message-Id: <1436796602-10228-3-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1436796602-10228-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> References: <1436796602-10228-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15071314-0013-0000-0000-0000018DE6D2 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stewart Smith , linux-pm@vger.kernel.org, viresh.kumar@linaro.org, linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org, Shilpasri G Bhat MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add OPAL_MSG_OCC message definition to opal_message_type to receive OCC events like reset, load and throttled. Host performance can be affected when OCC is reset or OCC throttles the max Pstate. We can register to opal_message_notifier to receive OPAL_MSG_OCC type of message and report it to the userspace so as to keep the user informed about the reason for a performance drop in workloads. The reset and load OCC events are notified to kernel when FSP sends OCC_RESET and OCC_LOAD commands. Both reset and load messages are sent to kernel on successful completion of reset and load operation respectively. The throttle OCC event indicates that the Pmax of the chip is reduced. The chip_id and throttle reason for reducing Pmax is also queued along with the message. CC: Stewart Smith Signed-off-by: Shilpasri G Bhat --- Changes from v3: - '0d7cd8550d3 powerpc/powernv: Add opal-prd channel' this patch adds the definition of OPAL_MSG_PRD, so remove it and update the changelog. - Move the definitions of OCC_RESET, OCC_LOAD and OCC_THROTTLE from drivers/cpufreq/powernv-cpufreq.c to arch/powerpc/include/asm/opal-api.h - Define OCC_MAX_THROTTLE_STATUS - Add a wrapper structure 'opal_occ_msg' to copy 'struct opal_msg.params[0..2]' This structure will define the parameters received from firmware to maintain compatibility for any future additions. No change from v2 Change from v1: - Update the commit changelog arch/powerpc/include/asm/opal-api.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index e9e4c52..64dc9f5 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -361,6 +361,7 @@ enum opal_msg_type { OPAL_MSG_HMI_EVT, OPAL_MSG_DPO, OPAL_MSG_PRD, + OPAL_MSG_OCC, OPAL_MSG_TYPE_MAX, }; @@ -700,6 +701,17 @@ struct opal_prd_msg_header { struct opal_prd_msg; +#define OCC_RESET 0 +#define OCC_LOAD 1 +#define OCC_THROTTLE 2 +#define OCC_MAX_THROTTLE_STATUS 5 + +struct opal_occ_msg { + __be64 type; + __be64 chip; + __be64 throttle_status; +}; + /* * SG entries *