From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8A76C433E3 for ; Wed, 22 Jul 2020 03:41:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B32EA20714 for ; Wed, 22 Jul 2020 03:41:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="ai/DdV/C" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731954AbgGVDlW (ORCPT ); Tue, 21 Jul 2020 23:41:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731793AbgGVDlV (ORCPT ); Tue, 21 Jul 2020 23:41:21 -0400 Received: from mail-pj1-x1042.google.com (mail-pj1-x1042.google.com [IPv6:2607:f8b0:4864:20::1042]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99BD1C061794 for ; Tue, 21 Jul 2020 20:41:21 -0700 (PDT) Received: by mail-pj1-x1042.google.com with SMTP id k1so442484pjt.5 for ; Tue, 21 Jul 2020 20:41:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=PZzzlTGx/ICdhYe+2uHcmJLnh4ijELIbpQJzlcitfzg=; b=ai/DdV/CJqkiOTk/OxKYWooQARnR8PUlYupif/hTCNrBSfYZYZGLan35Mzh+SgFcr9 VpeqiEbNmH5tPYS8hwLxjJ96WSug8dspyG/XUm2hqIHvH3vAS3aSLNMwlXSJNzTumeDV c8V3urmNxLey8ErM0fG3OJEz4xOkaTZYWxbSj223JpiveIi4G4B4xNjoHho5jU1OaF/2 lgDmrpVn43fQ/UxHBfI7qaTP/IlW2C3awRugCDDcly3hpFGkIWwG+bQVxuAxe+JhV5LM HerhCrIsFkOFqPcY63GaNXBNcJhQVjsrr5cFdzmSQCKwWdbuuerdiNhpppVRDAsM+MdU Ox1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=PZzzlTGx/ICdhYe+2uHcmJLnh4ijELIbpQJzlcitfzg=; b=WrzB1Y0LJ2qhXEfjWGckdoamgi1Cizg8u8x3JL6hleysUfTNb0+WlR83Eul4RWghap BarOLtgCJrYk3NXzKO5SGexgs54dP4zBv6M28EH/wtbdvbxEV/HF/PpComExE/krDnRp THsrk1oKsFFFO2m6r3qMOqNBn4hDH/csQ8sGt6LbkOzK/FyUhXrN9/MKmYUFpFIhfEkm LoA5qBT6xHRf2ND87iQj+eSax4utJDjii4rBzZLmFsZwMEL5Dsdgk0M+mYjoMcbwaKi5 wH6yj+NeoU3PmdnvNCLDL3EP3d9zhKk/OO7O1rNEd38d108QbIqxLIfx1XqRZYJS0OZF icXw== X-Gm-Message-State: AOAM532un6Mx2NRfpM59GWiJSJEzqS3tD0b59Nu9sGChmJkFiOxXHZaK iraXxg05hfUXBvpf3na0Iwygig== X-Google-Smtp-Source: ABdhPJz/qm9oGSAzIvz0j5eCSOowl+IiQ+z2o+LLeHpHXzL3pbfV/hIo+8xixeLKPlOIw8u6Zyq+cQ== X-Received: by 2002:a17:90b:4a06:: with SMTP id kk6mr7813256pjb.186.1595389281036; Tue, 21 Jul 2020 20:41:21 -0700 (PDT) Received: from builder.lan (104-188-17-28.lightspeed.sndgca.sbcglobal.net. [104.188.17.28]) by smtp.gmail.com with ESMTPSA id x10sm22150394pfp.80.2020.07.21.20.41.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Jul 2020 20:41:20 -0700 (PDT) Date: Tue, 21 Jul 2020 20:39:26 -0700 From: Bjorn Andersson To: Guennadi Liakhovetski Cc: Mathieu Poirier , Arnaud POULIQUEN , "Michael S. Tsirkin" , "linux-remoteproc@vger.kernel.org" , Ohad Ben-Cohen , Pierre-Louis Bossart , Liam Girdwood Subject: Re: [PATCH RESEND v4] rpmsg: virtio: add endianness conversions Message-ID: <20200722033926.GN2922385@builder.lan> References: <20200616073011.GB2999@ubuntu> <20200630175057.GA3831001@xps15> <20200701055912-mutt-send-email-mst@kernel.org> <20200706124716.GA5457@ubuntu> <20200706125657.GB5457@ubuntu> <20200706133835.GC5457@ubuntu> <20200707153436.GA5970@ubuntu> <20200721085638.GA3815@ubuntu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200721085638.GA3815@ubuntu> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org On Tue 21 Jul 01:56 PDT 2020, Guennadi Liakhovetski wrote: > According to the VirtIO 1.0 spec data, sent over virtual queues must > be in little-endian format. Update the RPMsg VirtIO implementation > to enforce that but let legacy configurations continue use native > endianness. > > Signed-off-by: Guennadi Liakhovetski > Reviewed-by: Mathieu Poirier > Tested-by: Arnaud Pouliquen > --- > > Ping: 2 weeks since the original submission. Also added back the updated > "reviewed-by" tag. > Sorry about that, I missed the reviewed version in my inbox. Applied to the rpmsg-next tree for v5.9, with Michael's ack. Regards, Bjorn > v4: fix a left-over use of an LE value in calculation - thanks to Arnaud for > catching! > > v3: use the virtio_byteorder.h header > > v2: Following suggestions from Michael and Mathieu switch to using virtio16/32 > types and conversion functions. > > drivers/rpmsg/virtio_rpmsg_bus.c | 63 +++++++++++++++++--------------- > 1 file changed, 34 insertions(+), 29 deletions(-) > > diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c > index 07d4f3374098..9006fc7f73d0 100644 > --- a/drivers/rpmsg/virtio_rpmsg_bus.c > +++ b/drivers/rpmsg/virtio_rpmsg_bus.c > @@ -23,6 +23,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -84,11 +85,11 @@ struct virtproc_info { > * Every message sent(/received) on the rpmsg bus begins with this header. > */ > struct rpmsg_hdr { > - u32 src; > - u32 dst; > - u32 reserved; > - u16 len; > - u16 flags; > + __virtio32 src; > + __virtio32 dst; > + __virtio32 reserved; > + __virtio16 len; > + __virtio16 flags; > u8 data[]; > } __packed; > > @@ -106,8 +107,8 @@ struct rpmsg_hdr { > */ > struct rpmsg_ns_msg { > char name[RPMSG_NAME_SIZE]; > - u32 addr; > - u32 flags; > + __virtio32 addr; > + __virtio32 flags; > } __packed; > > /** > @@ -335,8 +336,8 @@ static int virtio_rpmsg_announce_create(struct rpmsg_device *rpdev) > struct rpmsg_ns_msg nsm; > > strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE); > - nsm.addr = rpdev->ept->addr; > - nsm.flags = RPMSG_NS_CREATE; > + nsm.addr = cpu_to_virtio32(vrp->vdev, rpdev->ept->addr); > + nsm.flags = cpu_to_virtio32(vrp->vdev, RPMSG_NS_CREATE); > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > if (err) > @@ -359,8 +360,8 @@ static int virtio_rpmsg_announce_destroy(struct rpmsg_device *rpdev) > struct rpmsg_ns_msg nsm; > > strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE); > - nsm.addr = rpdev->ept->addr; > - nsm.flags = RPMSG_NS_DESTROY; > + nsm.addr = cpu_to_virtio32(vrp->vdev, rpdev->ept->addr); > + nsm.flags = cpu_to_virtio32(vrp->vdev, RPMSG_NS_DESTROY); > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > if (err) > @@ -612,18 +613,18 @@ static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev, > } > } > > - msg->len = len; > + msg->len = cpu_to_virtio16(vrp->vdev, len); > msg->flags = 0; > - msg->src = src; > - msg->dst = dst; > + msg->src = cpu_to_virtio32(vrp->vdev, src); > + msg->dst = cpu_to_virtio32(vrp->vdev, dst); > msg->reserved = 0; > memcpy(msg->data, data, len); > > dev_dbg(dev, "TX From 0x%x, To 0x%x, Len %d, Flags %d, Reserved %d\n", > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > + src, dst, len, msg->flags, msg->reserved); > #if defined(CONFIG_DYNAMIC_DEBUG) > dynamic_hex_dump("rpmsg_virtio TX: ", DUMP_PREFIX_NONE, 16, 1, > - msg, sizeof(*msg) + msg->len, true); > + msg, sizeof(*msg) + len, true); > #endif > > rpmsg_sg_init(&sg, msg, sizeof(*msg) + len); > @@ -704,13 +705,17 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > { > struct rpmsg_endpoint *ept; > struct scatterlist sg; > + unsigned int msg_len = virtio16_to_cpu(vrp->vdev, msg->len); > int err; > > dev_dbg(dev, "From: 0x%x, To: 0x%x, Len: %d, Flags: %d, Reserved: %d\n", > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > + virtio32_to_cpu(vrp->vdev, msg->src), > + virtio32_to_cpu(vrp->vdev, msg->dst), msg_len, > + virtio16_to_cpu(vrp->vdev, msg->flags), > + virtio32_to_cpu(vrp->vdev, msg->reserved)); > #if defined(CONFIG_DYNAMIC_DEBUG) > dynamic_hex_dump("rpmsg_virtio RX: ", DUMP_PREFIX_NONE, 16, 1, > - msg, sizeof(*msg) + msg->len, true); > + msg, sizeof(*msg) + msg_len, true); > #endif > > /* > @@ -718,15 +723,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > * the reported payload length. > */ > if (len > vrp->buf_size || > - msg->len > (len - sizeof(struct rpmsg_hdr))) { > - dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg->len); > + msg_len > (len - sizeof(struct rpmsg_hdr))) { > + dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg_len); > return -EINVAL; > } > > /* use the dst addr to fetch the callback of the appropriate user */ > mutex_lock(&vrp->endpoints_lock); > > - ept = idr_find(&vrp->endpoints, msg->dst); > + ept = idr_find(&vrp->endpoints, virtio32_to_cpu(vrp->vdev, msg->dst)); > > /* let's make sure no one deallocates ept while we use it */ > if (ept) > @@ -739,8 +744,8 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > mutex_lock(&ept->cb_lock); > > if (ept->cb) > - ept->cb(ept->rpdev, msg->data, msg->len, ept->priv, > - msg->src); > + ept->cb(ept->rpdev, msg->data, msg_len, ept->priv, > + virtio32_to_cpu(vrp->vdev, msg->src)); > > mutex_unlock(&ept->cb_lock); > > @@ -846,15 +851,15 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len, > /* don't trust the remote processor for null terminating the name */ > msg->name[RPMSG_NAME_SIZE - 1] = '\0'; > > - dev_info(dev, "%sing channel %s addr 0x%x\n", > - msg->flags & RPMSG_NS_DESTROY ? "destroy" : "creat", > - msg->name, msg->addr); > - > strncpy(chinfo.name, msg->name, sizeof(chinfo.name)); > chinfo.src = RPMSG_ADDR_ANY; > - chinfo.dst = msg->addr; > + chinfo.dst = virtio32_to_cpu(vrp->vdev, msg->addr); > + > + dev_info(dev, "%sing channel %s addr 0x%x\n", > + virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY ? > + "destroy" : "creat", msg->name, chinfo.dst); > > - if (msg->flags & RPMSG_NS_DESTROY) { > + if (virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY) { > ret = rpmsg_unregister_device(&vrp->vdev->dev, &chinfo); > if (ret) > dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret); > -- > 2.27.0 >