From patchwork Fri Jul 26 13:51:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 11061113 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 692D613A4 for ; Fri, 26 Jul 2019 13:52:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5575328AE1 for ; Fri, 26 Jul 2019 13:52:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 49ABA28AF2; Fri, 26 Jul 2019 13:52:28 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C6FB828AE6 for ; Fri, 26 Jul 2019 13:52:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ZNe7rS17LDC+Tw2lbqkgTLr8w4ivQ09vJpO39NYm9L4=; b=NGxm0lvmEoPZfYz3+YWTx/U7pe GLsI46xGVQhxHCp6kXsXV1wXFmb4QgY99rNc31xChVyIYWVUBZ2fBw37K+5Uikpa4WT2xT9OA9ILE LTJ9nmEdh7bzI/gtSEIikQ/gxokU1mEK0VV25d//jHk/1rOpcSKrcnOk4fZHXKYxR8nYkdpQT0YVt vvWgIzS9mLMyTCNVwkcpVWKBxcJtBI4XSq8kD2DY1Q8Li2mQlah04dqnJqUxfrkK9REPwt/FOvNrR +Et3tCw3yKqt45sLNwyPYSxaNMQ+jjX69l0XvVZtxM+2Y5pQD9zcecV11MEWKrJczW6sDvOp4eQTj 4fIHq4MA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hr0e3-00083B-71; Fri, 26 Jul 2019 13:52:27 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hr0dS-0007Yr-CG for linux-arm-kernel@lists.infradead.org; Fri, 26 Jul 2019 13:51:51 +0000 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 D8C5515A2; Fri, 26 Jul 2019 06:51:49 -0700 (PDT) Received: from usa.arm.com (e107155-lin.cambridge.arm.com [10.1.196.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A0AC43F694; Fri, 26 Jul 2019 06:51:48 -0700 (PDT) From: Sudeep Holla To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 02/10] firmware: arm_scmi: Segregate tx channel handling and prepare to add rx Date: Fri, 26 Jul 2019 14:51:30 +0100 Message-Id: <20190726135138.9858-3-sudeep.holla@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190726135138.9858-1-sudeep.holla@arm.com> References: <20190726135138.9858-1-sudeep.holla@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190726_065150_504186_245F00B7 X-CRM114-Status: GOOD ( 14.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peng Fan , Etienne Carriere , linux-kernel@vger.kernel.org, Bo Zhang , Jim Quinlan , Sudeep Holla , Gaku Inami , Volodymyr Babchuk MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The transmit(Tx) channels are specified as the first entry and the receive(Rx) channels are the second entry as per the device tree bindings. Since we currently just support Tx, index 0 is hardcoded at all required callsites. In order to prepare for adding Rx support, let's remove those hardcoded index and add boolean parameter to identify Tx/Rx channels when setting them up. Signed-off-by: Sudeep Holla --- drivers/firmware/arm_scmi/driver.c | 41 +++++++++++++++++------------- 1 file changed, 23 insertions(+), 18 deletions(-) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 0bd2af0a008f..336673afd6ef 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -112,7 +112,7 @@ struct scmi_chan_info { * @version: SCMI revision information containing protocol version, * implementation version and (sub-)vendor identification. * @minfo: Message info - * @tx_idr: IDR object to map protocol id to channel info pointer + * @tx_idr: IDR object to map protocol id to Tx channel info pointer * @protocols_imp: List of protocols implemented, currently maximum of * MAX_PROTOCOLS_IMP elements allocated by the base protocol * @node: List head @@ -640,22 +640,27 @@ static int scmi_xfer_info_init(struct scmi_info *sinfo) return 0; } -static int scmi_mailbox_check(struct device_node *np) +static int scmi_mailbox_check(struct device_node *np, int idx) { - return of_parse_phandle_with_args(np, "mboxes", "#mbox-cells", 0, NULL); + return of_parse_phandle_with_args(np, "mboxes", "#mbox-cells", + idx, NULL); } -static inline int -scmi_mbox_chan_setup(struct scmi_info *info, struct device *dev, int prot_id) +static int scmi_mbox_chan_setup(struct scmi_info *info, struct device *dev, + int prot_id, bool tx) { - int ret; + int ret, idx; struct resource res; resource_size_t size; struct device_node *shmem, *np = dev->of_node; struct scmi_chan_info *cinfo; struct mbox_client *cl; + const char *desc = tx ? "Tx" : "Rx"; + + /* Transmit channel is first entry i.e. index 0 */ + idx = tx ? 0 : 1; - if (scmi_mailbox_check(np)) { + if (scmi_mailbox_check(np, idx)) { cinfo = idr_find(&info->tx_idr, SCMI_PROTOCOL_BASE); goto idr_alloc; } @@ -669,31 +674,31 @@ scmi_mbox_chan_setup(struct scmi_info *info, struct device *dev, int prot_id) cl = &cinfo->cl; cl->dev = dev; cl->rx_callback = scmi_rx_callback; - cl->tx_prepare = scmi_tx_prepare; + cl->tx_prepare = tx ? scmi_tx_prepare : NULL; cl->tx_block = false; - cl->knows_txdone = true; + cl->knows_txdone = tx; - shmem = of_parse_phandle(np, "shmem", 0); + shmem = of_parse_phandle(np, "shmem", idx); ret = of_address_to_resource(shmem, 0, &res); of_node_put(shmem); if (ret) { - dev_err(dev, "failed to get SCMI Tx payload mem resource\n"); + dev_err(dev, "failed to get SCMI %s payload memory\n", desc); return ret; } size = resource_size(&res); cinfo->payload = devm_ioremap(info->dev, res.start, size); if (!cinfo->payload) { - dev_err(dev, "failed to ioremap SCMI Tx payload\n"); + dev_err(dev, "failed to ioremap SCMI %s payload\n", desc); return -EADDRNOTAVAIL; } - /* Transmit channel is first entry i.e. index 0 */ - cinfo->chan = mbox_request_channel(cl, 0); + cinfo->chan = mbox_request_channel(cl, idx); if (IS_ERR(cinfo->chan)) { ret = PTR_ERR(cinfo->chan); if (ret != -EPROBE_DEFER) - dev_err(dev, "failed to request SCMI Tx mailbox\n"); + dev_err(dev, "failed to request SCMI %s mailbox\n", + desc); return ret; } @@ -721,7 +726,7 @@ scmi_create_protocol_device(struct device_node *np, struct scmi_info *info, return; } - if (scmi_mbox_chan_setup(info, &sdev->dev, prot_id)) { + if (scmi_mbox_chan_setup(info, &sdev->dev, prot_id, true)) { dev_err(&sdev->dev, "failed to setup transport\n"); scmi_device_destroy(sdev); return; @@ -741,7 +746,7 @@ static int scmi_probe(struct platform_device *pdev) struct device_node *child, *np = dev->of_node; /* Only mailbox method supported, check for the presence of one */ - if (scmi_mailbox_check(np)) { + if (scmi_mailbox_check(np, 0)) { dev_err(dev, "no mailbox found in %pOF\n", np); return -EINVAL; } @@ -769,7 +774,7 @@ static int scmi_probe(struct platform_device *pdev) handle->dev = info->dev; handle->version = &info->version; - ret = scmi_mbox_chan_setup(info, dev, SCMI_PROTOCOL_BASE); + ret = scmi_mbox_chan_setup(info, dev, SCMI_PROTOCOL_BASE, true); if (ret) return ret;