From patchwork Wed Feb 3 08:15:32 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunyan Zhang X-Patchwork-Id: 8199091 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D0F8E9F37A for ; Wed, 3 Feb 2016 08:18:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0440620204 for ; Wed, 3 Feb 2016 08:18:05 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 230C8201FA for ; Wed, 3 Feb 2016 08:18:04 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aQsc8-0006YR-2K; Wed, 03 Feb 2016 08:16:36 +0000 Received: from mail-pa0-x22e.google.com ([2607:f8b0:400e:c03::22e]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aQsc1-0006Rb-OW for linux-arm-kernel@lists.infradead.org; Wed, 03 Feb 2016 08:16:33 +0000 Received: by mail-pa0-x22e.google.com with SMTP id ho8so9630754pac.2 for ; Wed, 03 Feb 2016 00:16:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=TGwcrbipNBubsEfOeperFF1uXR6hDFhAeZnQFjo5Hds=; b=Ddb8Wa9yk5eMFSUITgX/vi5JcQkvhIAJmXREyDrhQPLLlEC1Djz7xj5ljN8bpUXAkt BnRWFhLfXtmoTXMIHT+VP3wXY6T9xq7PcoTFMKwDWp1+MKe94D/tjUuKNXBY7gYMoCpM 3DpuPERTicLetxeYesecm64ZJzMLFk9lMuajw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=TGwcrbipNBubsEfOeperFF1uXR6hDFhAeZnQFjo5Hds=; b=Lh9YCAmtlpCcQwjvlx29vocYGNUdXKuiTLf6DZSrB6Z/pUjnul3FBlsTRIFuLkctwz BUpG1+YurI0TKBS/5dIeJQbwo+DpieTkHe2iJbJo1/4AwW0wk3x2NCBcN91FJ08dV/uC DBIGoJ1R+QzaXyIsqnnV1niJRcHoMRNePdlaKyah8N8kCPatAJwS8dEWxMhAel/FZyDf e6YelC/H38tpSbls9CKrKF/UHc87yKsv7hvBK1wqLxp09nJdFvMf//MRbl6ZZsItFwS2 NcqNuba/Ast4wc+xN1euZQUiy8cQ5hoRDXRcNKR5LbRPuf6h7Ffe/E1iCZL6KrgLYh4p 0bhg== X-Gm-Message-State: AG10YOSnbr9Ms6G2/T1fV4+YGMNIz+lMPVXYD7IUefNSnVvBzyNdChQs/ZOB2gjRkH44X6Cm X-Received: by 10.66.163.7 with SMTP id ye7mr254250pab.55.1454487368036; Wed, 03 Feb 2016 00:16:08 -0800 (PST) Received: from zcy-ubuntu.spreadtrum.com ([175.111.195.49]) by smtp.gmail.com with ESMTPSA id tp6sm7725820pab.25.2016.02.03.00.16.02 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 03 Feb 2016 00:16:07 -0800 (PST) From: Chunyan Zhang To: mathieu.poirier@linaro.org, alexander.shishkin@linux.intel.com Subject: [PATCH V2 1/6] stm class: Add ioctl get_options interface Date: Wed, 3 Feb 2016 16:15:32 +0800 Message-Id: <1454487337-30184-2-git-send-email-zhang.chunyan@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1454487337-30184-1-git-send-email-zhang.chunyan@linaro.org> References: <1454487337-30184-1-git-send-email-zhang.chunyan@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160203_001629_991434_E0747191 X-CRM114-Status: GOOD ( 11.96 ) X-Spam-Score: -2.5 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, al.grant@arm.com, corbet@lwn.net, zhang.lyra@gmail.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, tor@ti.com, broonie@kernel.org, mike.leach@arm.com, linux-api@vger.kernel.org, pratikp@codeaurora.org, nicolas.guion@st.com, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP There is already an interface of set_options, but no get_options yet. Before setting any options, one would may want to see the current status of that option by means of get_options interface. This interface has been used in CoreSight STM driver. Signed-off-by: Chunyan Zhang --- drivers/hwtracing/stm/core.c | 11 +++++++++++ include/linux/stm.h | 3 +++ include/uapi/linux/stm.h | 1 + 3 files changed, 15 insertions(+) diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c index b6445d9..86bb4e3 100644 --- a/drivers/hwtracing/stm/core.c +++ b/drivers/hwtracing/stm/core.c @@ -571,6 +571,17 @@ stm_char_ioctl(struct file *file, unsigned int cmd, unsigned long arg) options); break; + + case STP_GET_OPTIONS: + if (stm_data->get_options) + err = stm_data->get_options(stm_data, + stmf->output.master, + stmf->output.channel, + stmf->output.nr_chans, + &options); + + return copy_to_user((void __user *)arg, &options, sizeof(u64)); + default: break; } diff --git a/include/linux/stm.h b/include/linux/stm.h index 9d0083d..f351d62 100644 --- a/include/linux/stm.h +++ b/include/linux/stm.h @@ -88,6 +88,9 @@ struct stm_data { long (*set_options)(struct stm_data *, unsigned int, unsigned int, unsigned int, unsigned long); + long (*get_options)(struct stm_data *, unsigned int, + unsigned int, unsigned int, + u64 *); }; int stm_register_device(struct device *parent, struct stm_data *stm_data, diff --git a/include/uapi/linux/stm.h b/include/uapi/linux/stm.h index 626a8d3..0dab16e 100644 --- a/include/uapi/linux/stm.h +++ b/include/uapi/linux/stm.h @@ -46,5 +46,6 @@ struct stp_policy_id { #define STP_POLICY_ID_SET _IOWR('%', 0, struct stp_policy_id) #define STP_POLICY_ID_GET _IOR('%', 1, struct stp_policy_id) #define STP_SET_OPTIONS _IOW('%', 2, __u64) +#define STP_GET_OPTIONS _IOR('%', 3, __u64) #endif /* _UAPI_LINUX_STM_H */