From patchwork Tue Oct 11 06:36:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: mengdong.lin@linux.intel.com X-Patchwork-Id: 9370265 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 6644A60772 for ; Tue, 11 Oct 2016 09:23:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3BF7A29BFC for ; Tue, 11 Oct 2016 09:23:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2FDAB29C01; Tue, 11 Oct 2016 09:23:22 +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=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=ham 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 31EAD29BFC for ; Tue, 11 Oct 2016 09:23:16 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id AB747266BDA; Tue, 11 Oct 2016 11:23:15 +0200 (CEST) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 1BAE7266BDE; Tue, 11 Oct 2016 11:20:51 +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 C88202666C0; Tue, 11 Oct 2016 08:35:59 +0200 (CEST) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by alsa0.perex.cz (Postfix) with ESMTP id CD49A265284 for ; Tue, 11 Oct 2016 08:35:53 +0200 (CEST) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga104.jf.intel.com with ESMTP; 10 Oct 2016 23:35:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,476,1473145200"; d="scan'208";a="771185509" Received: from amanda-haswell-pc.sh.intel.com ([10.239.159.21]) by FMSMGA003.fm.intel.com with ESMTP; 10 Oct 2016 23:35:49 -0700 From: mengdong.lin@linux.intel.com To: alsa-devel@alsa-project.org, broonie@kernel.org Date: Tue, 11 Oct 2016 14:36:42 +0800 Message-Id: <39acbd6c55ca9ac0855001d5a67d7d96fddd0c7b.1476166990.git.mengdong.lin@linux.intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: References: Cc: Mengdong Lin , tiwai@suse.de, hardik.t.shah@intel.com, guneshwor.o.singh@intel.com, liam.r.girdwood@linux.intel.com, vinod.koul@intel.com, rakesh.a.ughreja@intel.com, mengdong.lin@intel.com Subject: [alsa-devel] [PATCH v6 01/11] ASoC: topology: Make manifest backward compatible from ABI v4 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 From: Mengdong Lin This patch adds support for old version 4 of manifest. Topology ABI v5 added new fields to manifest while user space may still uses v4. So kernel will check the ABI version by comparing the object size. If user space uses v4 of manifest, kernel will create a latest version of manifest from the old one, and use the new one internally and free it later. Signed-off-by: Mengdong Lin diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c index 6b05047..c832b24 100644 --- a/sound/soc/soc-topology.c +++ b/sound/soc/soc-topology.c @@ -53,6 +53,23 @@ #define SOC_TPLG_PASS_START SOC_TPLG_PASS_MANIFEST #define SOC_TPLG_PASS_END SOC_TPLG_PASS_BE_DAI + +/* + * Old version of ABI structs, supported for backward compatibility. + */ + +/* Manifest v4 */ +struct snd_soc_tplg_manifest_v4 { + __le32 size; /* in bytes of this structure */ + __le32 control_elems; /* number of control elements */ + __le32 widget_elems; /* number of widget elements */ + __le32 graph_elems; /* number of graph elements */ + __le32 pcm_elems; /* number of PCM elements */ + __le32 dai_link_elems; /* number of DAI link elements */ + struct snd_soc_tplg_private priv; +} __packed; + +/* topology context */ struct soc_tplg { const struct firmware *fw; @@ -1798,27 +1815,81 @@ static int soc_tplg_be_dai_elems_load(struct soc_tplg *tplg, return 0; } +/** + * manifest_new_ver - Create a new version of manifest from the old version + * of source. + * @toplogy: topology context + * @src: old version of manifest as a source + * @manifest: latest version of manifest created from the source + * + * Support from vesion 4. Users need free the returned manifest manually. + */ +static int manifest_new_ver(struct soc_tplg *tplg, + struct snd_soc_tplg_manifest *src, + struct snd_soc_tplg_manifest **manifest) +{ + struct snd_soc_tplg_manifest *dest; + struct snd_soc_tplg_manifest_v4 *src_v4; + + *manifest = NULL; + + if (src->size != sizeof(*src_v4)) { + dev_err(tplg->dev, "ASoC: invalid manifest size\n"); + return -EINVAL; + } + + dev_warn(tplg->dev, "ASoC: old version of manifest\n"); + + src_v4 = (struct snd_soc_tplg_manifest_v4 *)src; + dest = kzalloc(sizeof(*dest) + src_v4->priv.size, GFP_KERNEL); + if (!dest) + return -ENOMEM; + + dest->size = sizeof(*dest); /* size of latest abi version */ + dest->control_elems = src_v4->control_elems; + dest->widget_elems = src_v4->widget_elems; + dest->graph_elems = src_v4->graph_elems; + dest->pcm_elems = src_v4->pcm_elems; + dest->dai_link_elems = src_v4->dai_link_elems; + dest->priv.size = src_v4->priv.size; + if (dest->priv.size) + memcpy(dest->priv.data, src_v4->priv.data, + src_v4->priv.size); + + *manifest = dest; + return 0; +} static int soc_tplg_manifest_load(struct soc_tplg *tplg, struct snd_soc_tplg_hdr *hdr) { - struct snd_soc_tplg_manifest *manifest; + struct snd_soc_tplg_manifest *manifest, *_manifest; + bool abi_match; + int err; if (tplg->pass != SOC_TPLG_PASS_MANIFEST) return 0; manifest = (struct snd_soc_tplg_manifest *)tplg->pos; - if (manifest->size != sizeof(*manifest)) { - dev_err(tplg->dev, "ASoC: invalid manifest size\n"); - return -EINVAL; - } - tplg->pos += sizeof(struct snd_soc_tplg_manifest); + /* check ABI version by size, create a new manifest if abi not match */ + if (manifest->size == sizeof(*manifest)) { + abi_match = true; + _manifest = manifest; + } else { + abi_match = false; + err = manifest_new_ver(tplg, manifest, &_manifest); + if (err < 0) + return err; + } + /* pass control to component driver for optional further init */ if (tplg->comp && tplg->ops && tplg->ops->manifest) - return tplg->ops->manifest(tplg->comp, manifest); + return tplg->ops->manifest(tplg->comp, _manifest); + + if (!abi_match) /* free the duplicated one */ + kfree(_manifest); - dev_err(tplg->dev, "ASoC: Firmware manifest not supported\n"); return 0; }