From patchwork Thu May 17 08:58:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 10406001 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E456A60155 for ; Thu, 17 May 2018 09:01:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CEDBF289EB for ; Thu, 17 May 2018 09:01:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CD47E28A19; Thu, 17 May 2018 09:01:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 056A3289EB for ; Thu, 17 May 2018 09:01:48 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id A1ED6267634; Thu, 17 May 2018 11:01:11 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 1DCAB267365; Thu, 17 May 2018 11:01:04 +0200 (CEST) Received: from mail-wr0-f194.google.com (mail-wr0-f194.google.com [209.85.128.194]) by alsa0.perex.cz (Postfix) with ESMTP id 68800267332 for ; Thu, 17 May 2018 11:01:02 +0200 (CEST) Received: by mail-wr0-f194.google.com with SMTP id p5-v6so4801847wre.12 for ; Thu, 17 May 2018 02:01:02 -0700 (PDT) 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=GCf7pULtQuJ722oAoYhjTrAvrZ1qmDthf/krvZpChUE=; b=Gq9sZgC6sASV9b+cQwxGpekMXq+1pUyVJw50riDiN5FRvtssdfjjssJhEsTsEBUGmn SgkNsqgfLgpIMS8rwMd9rwfdi8ldgwU/xeQNyn/aH2q1VrAEs2DEC7GUeLjMMnGateTC PEEbTWkDlVShem7GH5XOuvRtg3d70iflkbvGc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=GCf7pULtQuJ722oAoYhjTrAvrZ1qmDthf/krvZpChUE=; b=prQ0d1KVbDG5Yuu9tHdguS5NBrLNn7qUOJS6nyt2keuMt90z/yPnwt+3WrV/EWIOOa yCY6NHo3qdRud9tivLVIhxAUw8yyyz/vZLJZbEQZE5uFlJQSfKYkWSlu7aSzKSiY7vof E3FcjNhqS6U7v4OW7aKJFHE6+WBTwFWJZ/dt4uqGBuJu0+lXVYbWpfj3t4XYhgWvv/nw 0wnZtIdy7d/l40Rz5LH/RUsz23Fd2j4yX2IR8uYnuV/Xlt2iT3ePWovUPtffJGjfIiTm JIL3qGJIiRAajdEQwBgYJ1gm7uc2IGCOi/kHMmsPofuTQJewVpNXpnN1NemCy1Cuyd2v QNZw== X-Gm-Message-State: ALKqPwd5NQ9Dm1hPZyEDumhdD2mDOrmFLJMuk2+ovFtelMmqkYP7cbEL xK+c0iXAQMThyDhUS1Zk+6DVnQ== X-Google-Smtp-Source: AB8JxZqCtv0mWH3ErDvBQgE9x1v68WqwLmduUGr5tlgcnMVI9ZrGqM3h/O/cnW+oR9xkTkXDpkiokQ== X-Received: by 2002:adf:b685:: with SMTP id j5-v6mr3685359wre.10.1526547662081; Thu, 17 May 2018 02:01:02 -0700 (PDT) Received: from localhost.localdomain (cpc90716-aztw32-2-0-cust92.18-1.cable.virginm.net. [86.26.100.93]) by smtp.gmail.com with ESMTPSA id y84-v6sm4123098wmg.44.2018.05.17.02.01.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 17 May 2018 02:01:01 -0700 (PDT) From: Srinivas Kandagatla To: gregkh@linuxfoundation.org Date: Thu, 17 May 2018 09:58:48 +0100 Message-Id: <20180517085850.14276-7-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180517085850.14276-1-srinivas.kandagatla@linaro.org> References: <20180517085850.14276-1-srinivas.kandagatla@linaro.org> Cc: alsa-devel@alsa-project.org, srinivas.kandagatla@linaro.org, linux-kernel@vger.kernel.org Subject: [alsa-devel] [PATCH v2 6/8] slimbus: messaging: add slim_prepare_txn() helper function X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds slim_prepare_txn() to allow controllers to prepare controller specific transaction. If not each controllers will duplicate the same code from core. Signed-off-by: Srinivas Kandagatla --- drivers/slimbus/messaging.c | 89 ++++++++++++++++++++++++++++++--------------- drivers/slimbus/qcom-ctrl.c | 7 +++- drivers/slimbus/slimbus.h | 2 + 3 files changed, 68 insertions(+), 30 deletions(-) diff --git a/drivers/slimbus/messaging.c b/drivers/slimbus/messaging.c index 1c57b631031a..fd0788019357 100644 --- a/drivers/slimbus/messaging.c +++ b/drivers/slimbus/messaging.c @@ -55,6 +55,50 @@ void slim_msg_response(struct slim_controller *ctrl, u8 *reply, u8 tid, u8 len) } EXPORT_SYMBOL_GPL(slim_msg_response); +/** + * slim_prepare_txn() - Prepare a transaction + * + * @ctrl: Controller handle + * @txn: transaction to be prepared + * @done: completion for transaction + * @need_tid: flag to indicate if tid is required for this txn + * + * Called by controller to prepare a transaction + * + * Return: zero on success and error code on failures. + */ +int slim_prepare_txn(struct slim_controller *ctrl, struct slim_msg_txn *txn, + struct completion *done, bool need_tid) +{ + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&ctrl->txn_lock, flags); + + if (need_tid) { + ret = idr_alloc(&ctrl->tid_idr, txn, 0, SLIM_MAX_TIDS, + GFP_ATOMIC); + if (ret < 0) { + spin_unlock_irqrestore(&ctrl->txn_lock, flags); + return ret; + } + txn->tid = ret; + txn->need_tid = true; + } else { + txn->need_tid = false; + } + + if (!txn->msg->comp) + txn->comp = done; + else + txn->comp = txn->msg->comp; + + spin_unlock_irqrestore(&ctrl->txn_lock, flags); + + return 0; +} +EXPORT_SYMBOL_GPL(slim_prepare_txn); + /** * slim_do_transfer() - Process a SLIMbus-messaging transaction * @@ -70,10 +114,9 @@ EXPORT_SYMBOL_GPL(slim_msg_response); */ int slim_do_transfer(struct slim_controller *ctrl, struct slim_msg_txn *txn) { - DECLARE_COMPLETION_ONSTACK(done); - bool need_tid = false, clk_pause_msg = false; + bool clk_pause_msg = false; unsigned long flags; - int ret, tid, timeout; + int ret, timeout; /* * do not vote for runtime-PM if the transactions are part of clock @@ -94,28 +137,8 @@ int slim_do_transfer(struct slim_controller *ctrl, struct slim_msg_txn *txn) } } - need_tid = slim_tid_txn(txn->mt, txn->mc); - - if (need_tid) { - spin_lock_irqsave(&ctrl->txn_lock, flags); - tid = idr_alloc(&ctrl->tid_idr, txn, 0, - SLIM_MAX_TIDS, GFP_ATOMIC); - txn->tid = tid; - - if (!txn->msg->comp) - txn->comp = &done; - else - txn->comp = txn->comp; - - spin_unlock_irqrestore(&ctrl->txn_lock, flags); - - if (tid < 0) - return tid; - } - ret = ctrl->xfer_msg(ctrl, txn); - - if (ret && need_tid && !txn->msg->comp) { + if (!ret && txn->need_tid && !txn->msg->comp) { unsigned long ms = txn->rl + HZ; timeout = wait_for_completion_timeout(txn->comp, @@ -123,7 +146,7 @@ int slim_do_transfer(struct slim_controller *ctrl, struct slim_msg_txn *txn) if (!timeout) { ret = -ETIMEDOUT; spin_lock_irqsave(&ctrl->txn_lock, flags); - idr_remove(&ctrl->tid_idr, tid); + idr_remove(&ctrl->tid_idr, txn->tid); spin_unlock_irqrestore(&ctrl->txn_lock, flags); } } @@ -133,13 +156,12 @@ int slim_do_transfer(struct slim_controller *ctrl, struct slim_msg_txn *txn) txn->mt, txn->mc, txn->la, ret); slim_xfer_err: - if (!clk_pause_msg && (!need_tid || ret == -ETIMEDOUT)) { + if (!clk_pause_msg && (!txn->need_tid || ret == -ETIMEDOUT)) { /* * remove runtime-pm vote if this was TX only, or * if there was error during this transaction */ pm_runtime_mark_last_busy(ctrl->dev); - pm_runtime_put_autosuspend(ctrl->dev); } return ret; } @@ -169,6 +191,7 @@ static int slim_val_inf_sanity(struct slim_controller *ctrl, if (msg->rbuf != NULL && msg->wbuf != NULL) return 0; break; + } reterr: if (msg) @@ -205,6 +228,8 @@ int slim_xfer_msg(struct slim_device *sbdev, struct slim_val_inf *msg, DEFINE_SLIM_LDEST_TXN(txn_stack, mc, 6, sbdev->laddr, msg); struct slim_msg_txn *txn = &txn_stack; struct slim_controller *ctrl = sbdev->ctrl; + DECLARE_COMPLETION_ONSTACK(done); + bool need_tid = false; int ret; u16 sl; @@ -232,10 +257,16 @@ int slim_xfer_msg(struct slim_device *sbdev, struct slim_val_inf *msg, break; } - if (slim_tid_txn(txn->mt, txn->mc)) + if (slim_tid_txn(txn->mt, txn->mc)) { txn->rl++; + need_tid = true; + } - return slim_do_transfer(ctrl, txn); + ret = slim_prepare_txn(ctrl, txn, &done, need_tid); + if (!ret) + return slim_do_transfer(ctrl, txn); + + return ret; } EXPORT_SYMBOL_GPL(slim_xfer_msg); diff --git a/drivers/slimbus/qcom-ctrl.c b/drivers/slimbus/qcom-ctrl.c index bb36a8fbc9b1..412a60a314b1 100644 --- a/drivers/slimbus/qcom-ctrl.c +++ b/drivers/slimbus/qcom-ctrl.c @@ -397,6 +397,7 @@ static int qcom_set_laddr(struct slim_controller *sctrl, u8 instance; u8 laddr; } __packed p; + DECLARE_COMPLETION_ONSTACK(done); struct slim_val_inf msg = {0}; DEFINE_SLIM_EDEST_TXN(txn, SLIM_MSG_MC_ASSIGN_LOGICAL_ADDRESS, 10, laddr, &msg); @@ -410,7 +411,11 @@ static int qcom_set_laddr(struct slim_controller *sctrl, msg.wbuf = (void *)&p; msg.num_bytes = 7; - ret = slim_do_transfer(&ctrl->ctrl, &txn); + + ret = slim_prepare_txn(&ctrl->ctrl, &txn, &done, + slim_tid_txn(txn.mt, txn.mc)); + if (!ret) + ret = slim_do_transfer(&ctrl->ctrl, &txn); if (ret) dev_err(ctrl->dev, "set LA:0x%x failed:ret:%d\n", diff --git a/drivers/slimbus/slimbus.h b/drivers/slimbus/slimbus.h index 3ec5a85fba8e..8266e53535cb 100644 --- a/drivers/slimbus/slimbus.h +++ b/drivers/slimbus/slimbus.h @@ -242,6 +242,8 @@ int slim_unregister_controller(struct slim_controller *ctrl); void slim_msg_response(struct slim_controller *ctrl, u8 *reply, u8 tid, u8 l); int slim_do_transfer(struct slim_controller *ctrl, struct slim_msg_txn *txn); int slim_ctrl_clk_pause(struct slim_controller *ctrl, bool wakeup, u8 restart); +int slim_prepare_txn(struct slim_controller *ctrl, struct slim_msg_txn *txn, + struct completion *done, bool need_tid); static inline bool slim_tid_txn(u8 mt, u8 mc) {