From patchwork Wed Oct 3 11:34:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun Kumar Neelakantam X-Patchwork-Id: 10624647 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 8677A15A6 for ; Wed, 3 Oct 2018 11:34:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 77E6E287E2 for ; Wed, 3 Oct 2018 11:34:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6BAB32880B; Wed, 3 Oct 2018 11:34:59 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8D690287E2 for ; Wed, 3 Oct 2018 11:34:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726547AbeJCSWw (ORCPT ); Wed, 3 Oct 2018 14:22:52 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:55080 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726617AbeJCSWw (ORCPT ); Wed, 3 Oct 2018 14:22:52 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 911E8607BD; Wed, 3 Oct 2018 11:34:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1538566491; bh=tt+NgkqbOF6X7P7TEkE2mbojlOPdiDYXaQowH2j7qek=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T0sI1qmgm9rBBGWEhHw0g0T29SflWykOtuCc99uZwfxU4GYUh3sHRdK79qG8ElnS4 FLgXj3bQFiM8B8YLgJ5Wq3KYTKswZWrBqJPcYz5IW2pHsfCZbkitj4BbHmYi5mgSOX oTuVgIVoqco4fZZlRQnj58BAvY+adJFwPKRRl9d8= Received: from aneelaka-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: aneela@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 745CD60275; Wed, 3 Oct 2018 11:34:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1538566490; bh=tt+NgkqbOF6X7P7TEkE2mbojlOPdiDYXaQowH2j7qek=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JLaW45UHb+L1M5PKRn67dpPTy8FbQvxAN3m14jH9hlkcNdiDZcjMVPm4EDDb6Mxhp cqhFt0Swaf8+UFrNBAvVU6/fb/6FLf1t2kyprrIjNMgcfvhyWfKBxucR4LJTQFfHU5 xrMjv6AB7rJdL4Upji8G/PHOcj9q4quvY9a79qmM= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 745CD60275 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=aneela@codeaurora.org From: Arun Kumar Neelakantam To: ohad@wizery.com, bjorn.andersson@linaro.org, clew@codeaurora.org, sricharan@codeaurora.org Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Arun Kumar Neelakantam Subject: [PATCH 1/5] rpmsg: glink: Add GLINK signal support for RPMSG Date: Wed, 3 Oct 2018 17:04:19 +0530 Message-Id: <1538566463-24627-2-git-send-email-aneela@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> References: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add support to handle SMD signals to RPMSG over GLINK. SMD signals mimic serial protocol signals to notify of ports opening and closing. This change affects the rpmsg core, rpmsg char and glink drivers. Signed-off-by: Chris Lew Signed-off-by: Arun Kumar Neelakantam --- drivers/rpmsg/qcom_glink_native.c | 80 +++++++++++++++++++++++++++++++++++++++ drivers/rpmsg/rpmsg_core.c | 41 ++++++++++++++++++++ drivers/rpmsg/rpmsg_internal.h | 5 +++ include/linux/rpmsg.h | 25 ++++++++++++ 4 files changed, 151 insertions(+) diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index f6988fd..ff8751b 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2016-2017, Linaro Ltd + * Copyright (c) 2018, The Linux Foundation. */ #include @@ -150,6 +151,8 @@ enum { * @intent_req_lock: Synchronises multiple intent requests * @intent_req_result: Result of intent request * @intent_req_comp: Completion for intent_req signalling + * @lsigs: Local side signals + * @rsigs: Remote side signals */ struct glink_channel { struct rpmsg_endpoint ept; @@ -181,6 +184,9 @@ struct glink_channel { struct mutex intent_req_lock; bool intent_req_result; struct completion intent_req_comp; + + unsigned int lsigs; + unsigned int rsigs; }; #define to_glink_channel(_ept) container_of(_ept, struct glink_channel, ept) @@ -201,6 +207,7 @@ struct glink_channel { #define RPM_CMD_TX_DATA_CONT 12 #define RPM_CMD_READ_NOTIF 13 #define RPM_CMD_RX_DONE_W_REUSE 14 +#define RPM_CMD_SIGNALS 15 #define GLINK_FEATURE_INTENTLESS BIT(1) @@ -954,6 +961,52 @@ static int qcom_glink_rx_open_ack(struct qcom_glink *glink, unsigned int lcid) return 0; } +/** + * qcom_glink_send_signals() - convert a signal cmd to wire format and transmit + * @glink: The transport to transmit on. + * @channel: The glink channel + * @sigs: The signals to encode. + * + * Return: 0 on success or standard Linux error code. + */ +static int qcom_glink_send_signals(struct qcom_glink *glink, + struct glink_channel *channel, + u32 sigs) +{ + struct glink_msg msg; + + msg.cmd = cpu_to_le16(RPM_CMD_SIGNALS); + msg.param1 = cpu_to_le16(channel->lcid); + msg.param2 = cpu_to_le32(sigs); + + return qcom_glink_tx(glink, &msg, sizeof(msg), NULL, 0, true); +} + +static int qcom_glink_handle_signals(struct qcom_glink *glink, + unsigned int rcid, unsigned int signals) +{ + struct glink_channel *channel; + unsigned long flags; + u32 old; + + spin_lock_irqsave(&glink->idr_lock, flags); + channel = idr_find(&glink->rcids, rcid); + spin_unlock_irqrestore(&glink->idr_lock, flags); + if (!channel) { + dev_err(glink->dev, "signal for non-existing channel\n"); + return -EINVAL; + } + + old = channel->rsigs; + channel->rsigs = signals; + + if (channel->ept.sig_cb) + channel->ept.sig_cb(channel->ept.rpdev, channel->ept.priv, + old, channel->rsigs); + + return 0; +} + static irqreturn_t qcom_glink_native_intr(int irq, void *data) { struct qcom_glink *glink = data; @@ -1015,6 +1068,10 @@ static irqreturn_t qcom_glink_native_intr(int irq, void *data) qcom_glink_handle_intent_req_ack(glink, param1, param2); qcom_glink_rx_advance(glink, ALIGN(sizeof(msg), 8)); break; + case RPM_CMD_SIGNALS: + qcom_glink_handle_signals(glink, param1, param2); + qcom_glink_rx_advance(glink, ALIGN(sizeof(msg), 8)); + break; default: dev_err(glink->dev, "unhandled rx cmd: %d\n", cmd); ret = -EINVAL; @@ -1312,6 +1369,27 @@ static int qcom_glink_trysend(struct rpmsg_endpoint *ept, void *data, int len) return __qcom_glink_send(channel, data, len, false); } +static int qcom_glink_get_sigs(struct rpmsg_endpoint *ept, + u32 *lsigs, u32 *rsigs) +{ + struct glink_channel *channel = to_glink_channel(ept); + + *lsigs = channel->lsigs; + *rsigs = channel->rsigs; + + return 0; +} + +static int qcom_glink_set_sigs(struct rpmsg_endpoint *ept, u32 sigs) +{ + struct glink_channel *channel = to_glink_channel(ept); + struct qcom_glink *glink = channel->glink; + + channel->lsigs = sigs; + + return qcom_glink_send_signals(glink, channel, sigs); +} + /* * Finds the device_node for the glink child interested in this channel. */ @@ -1345,6 +1423,8 @@ static struct device_node *qcom_glink_match_channel(struct device_node *node, .destroy_ept = qcom_glink_destroy_ept, .send = qcom_glink_send, .trysend = qcom_glink_trysend, + .get_sigs = qcom_glink_get_sigs, + .set_sigs = qcom_glink_set_sigs, }; static void qcom_glink_rpdev_release(struct device *dev) diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c index c4585d6..5b39139 100644 --- a/drivers/rpmsg/rpmsg_core.c +++ b/drivers/rpmsg/rpmsg_core.c @@ -4,6 +4,7 @@ * * Copyright (C) 2011 Texas Instruments, Inc. * Copyright (C) 2011 Google, Inc. + * Copyright (c) 2018 The Linux Foundation. * * Ohad Ben-Cohen * Brian Swetland @@ -283,6 +284,42 @@ int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, } EXPORT_SYMBOL(rpmsg_trysend_offchannel); +/** + * rpmsg_get_sigs() - get the signals for this endpoint + * @ept: the rpmsg endpoint + * @sigs: serial signals bitmask + * + * Returns 0 on success and an appropriate error value on failure. + */ +int rpmsg_get_sigs(struct rpmsg_endpoint *ept, u32 *lsigs, u32 *rsigs) +{ + if (WARN_ON(!ept)) + return -EINVAL; + if (!ept->ops->get_sigs) + return -ENXIO; + + return ept->ops->get_sigs(ept, lsigs, rsigs); +} +EXPORT_SYMBOL(rpmsg_get_sigs); + +/** + * rpmsg_set_sigs() - set the remote signals for this endpoint + * @ept: the rpmsg endpoint + * @sigs: serial signals bitmask + * + * Returns 0 on success and an appropriate error value on failure. + */ +int rpmsg_set_sigs(struct rpmsg_endpoint *ept, u32 sigs) +{ + if (WARN_ON(!ept)) + return -EINVAL; + if (!ept->ops->set_sigs) + return -ENXIO; + + return ept->ops->set_sigs(ept, sigs); +} +EXPORT_SYMBOL(rpmsg_set_sigs); + /* * match an rpmsg channel with a channel info struct. * this is used to make sure we're not creating rpmsg devices for channels @@ -468,6 +505,10 @@ static int rpmsg_dev_probe(struct device *dev) rpdev->ept = ept; rpdev->src = ept->addr; + + if (rpdrv->signals) + ept->sig_cb = rpdrv->signals; + } err = rpdrv->probe(rpdev); diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h index 0d791c3..034ac07 100644 --- a/drivers/rpmsg/rpmsg_internal.h +++ b/drivers/rpmsg/rpmsg_internal.h @@ -4,6 +4,7 @@ * * Copyright (C) 2011 Texas Instruments, Inc. * Copyright (C) 2011 Google, Inc. + * Copyright (c) 2018 The Linux Foundation. * * Ohad Ben-Cohen * Brian Swetland @@ -46,6 +47,8 @@ struct rpmsg_device_ops { * @trysend: see @rpmsg_trysend(), required * @trysendto: see @rpmsg_trysendto(), optional * @trysend_offchannel: see @rpmsg_trysend_offchannel(), optional + * @get_sigs: see @rpmsg_get_sigs(), optional + * @set_sigs: see @rpmsg_set_sigs(), optional * * Indirection table for the operations that a rpmsg backend should implement. * In addition to @destroy_ept, the backend must at least implement @send and @@ -65,6 +68,8 @@ struct rpmsg_endpoint_ops { void *data, int len); __poll_t (*poll)(struct rpmsg_endpoint *ept, struct file *filp, poll_table *wait); + int (*get_sigs)(struct rpmsg_endpoint *ept, u32 *lsigs, u32 *rsigs); + int (*set_sigs)(struct rpmsg_endpoint *ept, u32 sigs); }; int rpmsg_register_device(struct rpmsg_device *rpdev); diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h index 9fe156d..580726d 100644 --- a/include/linux/rpmsg.h +++ b/include/linux/rpmsg.h @@ -4,6 +4,7 @@ * * Copyright (C) 2011 Texas Instruments, Inc. * Copyright (C) 2011 Google, Inc. + * Copyright (c) 2018 The Linux Foundation. * All rights reserved. */ @@ -60,6 +61,7 @@ struct rpmsg_device { }; typedef int (*rpmsg_rx_cb_t)(struct rpmsg_device *, void *, int, void *, u32); +typedef int (*rpmsg_rx_sig_t)(struct rpmsg_device *, void *, u32, u32); /** * struct rpmsg_endpoint - binds a local rpmsg address to its user @@ -67,6 +69,7 @@ struct rpmsg_device { * @refcount: when this drops to zero, the ept is deallocated * @cb: rx callback handler * @cb_lock: must be taken before accessing/changing @cb + * @sig_cb: rx serial signal handler * @addr: local rpmsg address * @priv: private data for the driver's use * @@ -89,6 +92,7 @@ struct rpmsg_endpoint { struct kref refcount; rpmsg_rx_cb_t cb; struct mutex cb_lock; + rpmsg_rx_sig_t sig_cb; u32 addr; void *priv; @@ -102,6 +106,7 @@ struct rpmsg_endpoint { * @probe: invoked when a matching rpmsg channel (i.e. device) is found * @remove: invoked when the rpmsg channel is removed * @callback: invoked when an inbound message is received on the channel + * @signals: invoked when a serial signal change is received on the channel */ struct rpmsg_driver { struct device_driver drv; @@ -109,6 +114,7 @@ struct rpmsg_driver { int (*probe)(struct rpmsg_device *dev); void (*remove)(struct rpmsg_device *dev); int (*callback)(struct rpmsg_device *, void *, int, void *, u32); + int (*signals)(struct rpmsg_device *, void *, u32, u32); }; #if IS_ENABLED(CONFIG_RPMSG) @@ -135,6 +141,8 @@ int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, struct file *filp, poll_table *wait); +int rpmsg_get_sigs(struct rpmsg_endpoint *ept, u32 *lsigs, u32 *rsigs); +int rpmsg_set_sigs(struct rpmsg_endpoint *ept, u32 sigs); #else static inline int register_rpmsg_device(struct rpmsg_device *dev) @@ -242,6 +250,23 @@ static inline __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, return 0; } +static inline int rpmsg_get_sigs(struct rpmsg_endpoint *ept, u32 *lsigs, + u32 *rsigs) +{ + /* This shouldn't be possible */ + WARN_ON(1); + + return -ENXIO; +} + +static inline int rpmsg_set_sigs(struct rpmsg_endpoint *ept, u32 sigs) +{ + /* This shouldn't be possible */ + WARN_ON(1); + + return -ENXIO; +} + #endif /* IS_ENABLED(CONFIG_RPMSG) */ /* use a macro to avoid include chaining to get THIS_MODULE */ From patchwork Wed Oct 3 11:34:20 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun Kumar Neelakantam X-Patchwork-Id: 10624649 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 019CB14BD for ; Wed, 3 Oct 2018 11:35:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E74F9287C3 for ; 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dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=aneela@codeaurora.org From: Arun Kumar Neelakantam To: ohad@wizery.com, bjorn.andersson@linaro.org, clew@codeaurora.org, sricharan@codeaurora.org Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Arun Kumar Neelakantam Subject: [PATCH 2/5] rpmsg: Add signal callback to rpmsg char device Date: Wed, 3 Oct 2018 17:04:20 +0530 Message-Id: <1538566463-24627-3-git-send-email-aneela@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> References: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Register a callback to get the signal notifications from rpmsg. Signed-off-by: Arun Kumar Neelakantam --- drivers/rpmsg/rpmsg_char.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index a76b963..86003d5 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -5,6 +5,7 @@ * Copyright (c) 2012, PetaLogix * Copyright (c) 2011, Texas Instruments, Inc. * Copyright (c) 2011, Google, Inc. + * Copyright (c) 2018, The Linux Foundation. * * Based on rpmsg performance statistics driver by Michal Simek, which in turn * was based on TI & Google OMX rpmsg driver. @@ -120,6 +121,12 @@ static int rpmsg_ept_cb(struct rpmsg_device *rpdev, void *buf, int len, return 0; } +static int rpmsg_sigs_cb(struct rpmsg_device *rpdev, void *priv, + u32 old, u32 new) +{ + return 0; +} + static int rpmsg_eptdev_open(struct inode *inode, struct file *filp) { struct rpmsg_eptdev *eptdev = cdev_to_eptdev(inode->i_cdev); @@ -136,6 +143,7 @@ static int rpmsg_eptdev_open(struct inode *inode, struct file *filp) return -EINVAL; } + ept->sig_cb = rpmsg_sigs_cb; eptdev->ept = ept; filp->private_data = eptdev; From patchwork Wed Oct 3 11:34:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun Kumar Neelakantam X-Patchwork-Id: 10624651 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 434E314BD for ; Wed, 3 Oct 2018 11:35:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 36735287C3 for ; Wed, 3 Oct 2018 11:35:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2AF8E287E5; Wed, 3 Oct 2018 11:35:12 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C620F287C3 for ; Wed, 3 Oct 2018 11:35:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727137AbeJCSXL (ORCPT ); Wed, 3 Oct 2018 14:23:11 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:55364 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726617AbeJCSXK (ORCPT ); Wed, 3 Oct 2018 14:23:10 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id C790960C62; Wed, 3 Oct 2018 11:35:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1538566509; bh=q8HwYztCvotKOrqEFcstvdFfANwvR5OGFj7Il4/+IVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GqqltBA51WMDvB7vknEvRGUsu0nvX0TOEnjHFk+qOx62rP5QsjNOA+rn3IFHBrnss h5tVsatsfK7q+a2wJHtHkF0cR6tk5M3D002QgKdSmjTL8sz+KBchspOZAYATfDy1EE 0NqhAetpU9bs0KxLMrEfYdICQ+gM2jIGBZkIUzos= Received: from aneelaka-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: aneela@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id C8D0460B26; Wed, 3 Oct 2018 11:35:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1538566509; bh=q8HwYztCvotKOrqEFcstvdFfANwvR5OGFj7Il4/+IVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GqqltBA51WMDvB7vknEvRGUsu0nvX0TOEnjHFk+qOx62rP5QsjNOA+rn3IFHBrnss h5tVsatsfK7q+a2wJHtHkF0cR6tk5M3D002QgKdSmjTL8sz+KBchspOZAYATfDy1EE 0NqhAetpU9bs0KxLMrEfYdICQ+gM2jIGBZkIUzos= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org C8D0460B26 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=aneela@codeaurora.org From: Arun Kumar Neelakantam To: ohad@wizery.com, bjorn.andersson@linaro.org, clew@codeaurora.org, sricharan@codeaurora.org Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Arun Kumar Neelakantam Subject: [PATCH 3/5] rpmsg: Add TIOCMGET/TIOCMSET ioctl support Date: Wed, 3 Oct 2018 17:04:21 +0530 Message-Id: <1538566463-24627-4-git-send-email-aneela@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> References: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add TICOMGET and TIOCMSET ioctl support for rpmsg char device nodes to get/set the low level transport signals. Signed-off-by: Arun Kumar Neelakantam --- drivers/rpmsg/rpmsg_char.c | 54 +++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 51 insertions(+), 3 deletions(-) diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index 86003d5..c983d6c 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -274,15 +275,62 @@ static __poll_t rpmsg_eptdev_poll(struct file *filp, poll_table *wait) return mask; } +static int rpmsg_eptdev_tiocmset(struct file *fp, unsigned int cmd, + unsigned long arg) +{ + struct rpmsg_eptdev *eptdev = fp->private_data; + u32 lsigs, rsigs, val; + int ret; + + ret = get_user(val, (u32 *)arg); + if (ret) + return ret; + + ret = rpmsg_get_sigs(eptdev->ept, &lsigs, &rsigs); + if (ret < 0) + return ret; + + switch (cmd) { + case TIOCMBIS: + lsigs |= val; + break; + case TIOCMBIC: + lsigs &= ~val; + break; + case TIOCMSET: + lsigs = val; + break; + } + + ret = rpmsg_set_sigs(eptdev->ept, lsigs); + return ret; +} + static long rpmsg_eptdev_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) { struct rpmsg_eptdev *eptdev = fp->private_data; + u32 lsigs, rsigs; + int ret; - if (cmd != RPMSG_DESTROY_EPT_IOCTL) - return -EINVAL; + switch (cmd) { + case TIOCMGET: + ret = rpmsg_get_sigs(eptdev->ept, &lsigs, &rsigs); + if (!ret) + ret = put_user(rsigs, (u32 *)arg); + break; + case TIOCMSET: + case TIOCMBIS: + case TIOCMBIC: + ret = rpmsg_eptdev_tiocmset(fp, cmd, arg); + break; + case RPMSG_DESTROY_EPT_IOCTL: + ret = rpmsg_eptdev_destroy(&eptdev->dev, NULL); + default: + ret = -EINVAL; + } - return rpmsg_eptdev_destroy(&eptdev->dev, NULL); + return ret; } static const struct file_operations rpmsg_eptdev_fops = { From patchwork Wed Oct 3 11:34:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun Kumar Neelakantam X-Patchwork-Id: 10624653 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 9CDD115A6 for ; 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h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o4VnAVzS5WVlr7IblzxjL3/jdOK8RFoF5M5dMCmsO+Z9Aqzb/rhoWx3LjzlK2acY8 +Hw0h0D5yJ7IHA69W1mMihJhpE4WD0nBLGWds8BlMoci/lJ+AXrhcv4x5uw5/iMWiT 9UEcOLy7OK8yrfwzq8F16l1F12O0f0y6c7TBv7VE= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 64562607BD Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=aneela@codeaurora.org From: Arun Kumar Neelakantam To: ohad@wizery.com, bjorn.andersson@linaro.org, clew@codeaurora.org, sricharan@codeaurora.org Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Arun Kumar Neelakantam Subject: [PATCH 4/5] rpmsg: wakeup poll to notify signal update Date: Wed, 3 Oct 2018 17:04:22 +0530 Message-Id: <1538566463-24627-5-git-send-email-aneela@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> References: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add support to wait on poll to get signal notifications. Send POLLPRI mask to indicate the signal change. Signed-off-by: Arun Kumar Neelakantam --- drivers/rpmsg/rpmsg_char.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index c983d6c..aee5561 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -64,6 +64,7 @@ struct rpmsg_ctrldev { * @queue_lock: synchronization of @queue operations * @queue: incoming message queue * @readq: wait object for incoming queue + * @sig_pending:state of signal notification */ struct rpmsg_eptdev { struct device dev; @@ -78,6 +79,8 @@ struct rpmsg_eptdev { spinlock_t queue_lock; struct sk_buff_head queue; wait_queue_head_t readq; + + atomic_t sig_pending; }; static int rpmsg_eptdev_destroy(struct device *dev, void *data) @@ -125,6 +128,12 @@ static int rpmsg_ept_cb(struct rpmsg_device *rpdev, void *buf, int len, static int rpmsg_sigs_cb(struct rpmsg_device *rpdev, void *priv, u32 old, u32 new) { + struct rpmsg_eptdev *eptdev = priv; + + atomic_set(&eptdev->sig_pending, 1); + + /* wake up any blocking processes, waiting for signal notification */ + wake_up_interruptible(&eptdev->readq); return 0; } @@ -164,6 +173,7 @@ static int rpmsg_eptdev_release(struct inode *inode, struct file *filp) eptdev->ept = NULL; } mutex_unlock(&eptdev->ept_lock); + atomic_set(&eptdev->sig_pending, 0); /* Discard all SKBs */ while (!skb_queue_empty(&eptdev->queue)) { @@ -270,6 +280,9 @@ static __poll_t rpmsg_eptdev_poll(struct file *filp, poll_table *wait) if (!skb_queue_empty(&eptdev->queue)) mask |= EPOLLIN | EPOLLRDNORM; + if (atomic_read(&eptdev->sig_pending)) + mask |= POLLPRI; + mask |= rpmsg_poll(eptdev->ept, filp, wait); return mask; @@ -318,6 +331,7 @@ static long rpmsg_eptdev_ioctl(struct file *fp, unsigned int cmd, ret = rpmsg_get_sigs(eptdev->ept, &lsigs, &rsigs); if (!ret) ret = put_user(rsigs, (u32 *)arg); + atomic_set(&eptdev->sig_pending, 0); break; case TIOCMSET: case TIOCMBIS: From patchwork Wed Oct 3 11:34:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun Kumar Neelakantam X-Patchwork-Id: 10624655 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 B3A3315A6 for ; 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h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O0H5PBh4Ec86a9c7wVGhTgenGR/+dnxZoXq0/KSSVQsWPBql3FO/lmUxrDMMNxSjM HbFGn04FylYxe0eLtMcLDfNog7aaDpPMXUClITkvTGS1qLEWcIjXxaNmBTOws4e+WM Tqqe4P1AzVwLq1qwOHxuxvl+fUkFF4eoSC9+S47c= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org DB7C360C85 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=aneela@codeaurora.org From: Arun Kumar Neelakantam To: ohad@wizery.com, bjorn.andersson@linaro.org, clew@codeaurora.org, sricharan@codeaurora.org Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Arun Kumar Neelakantam Subject: [PATCH 5/5] rpmsg: glink: Convert the native signals to TIOCM Date: Wed, 3 Oct 2018 17:04:23 +0530 Message-Id: <1538566463-24627-6-git-send-email-aneela@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> References: <1538566463-24627-1-git-send-email-aneela@codeaurora.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Native signals over SMEM transport are different from Linux TIOCM signals. Add a macro to convert signals when sent or received from clients. Signed-off-by: Arun Kumar Neelakantam --- drivers/rpmsg/qcom_glink_native.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index ff8751b..3054c86 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include @@ -211,6 +212,11 @@ struct glink_channel { #define GLINK_FEATURE_INTENTLESS BIT(1) +#define NATIVE_DTR_SIG BIT(31) +#define NATIVE_CTS_SIG BIT(30) +#define NATIVE_CD_SIG BIT(29) +#define NATIVE_RI_SIG BIT(28) + static void qcom_glink_rx_done_work(struct work_struct *work); static struct glink_channel *qcom_glink_alloc_channel(struct qcom_glink *glink, @@ -998,6 +1004,18 @@ static int qcom_glink_handle_signals(struct qcom_glink *glink, } old = channel->rsigs; + + /* convert signals from NATIVE to TIOCM */ + if (signals & NATIVE_DTR_SIG) + signals |= TIOCM_DSR; + if (signals & NATIVE_CTS_SIG) + signals |= TIOCM_CTS; + if (signals & NATIVE_CD_SIG) + signals |= TIOCM_CD; + if (signals & NATIVE_RI_SIG) + signals |= TIOCM_RI; + signals &= 0x0fff; + channel->rsigs = signals; if (channel->ept.sig_cb) @@ -1387,6 +1405,17 @@ static int qcom_glink_set_sigs(struct rpmsg_endpoint *ept, u32 sigs) channel->lsigs = sigs; + /* convert signals from TIOCM to NATIVE */ + sigs &= 0x0fff; + if (sigs & TIOCM_DTR) + sigs |= NATIVE_DTR_SIG; + if (sigs & TIOCM_RTS) + sigs |= NATIVE_CTS_SIG; + if (sigs & TIOCM_CD) + sigs |= NATIVE_CD_SIG; + if (sigs & TIOCM_RI) + sigs |= NATIVE_RI_SIG; + return qcom_glink_send_signals(glink, channel, sigs); }