From patchwork Tue Nov 5 08:01:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 11227115 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D9013112B for ; Tue, 5 Nov 2019 08:02:38 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5B738214D8 for ; Tue, 5 Nov 2019 08:02:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="qcr6iBbg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B738214D8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 6846A170B; Tue, 5 Nov 2019 09:01:46 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 6846A170B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1572940956; bh=oame+hngOpbmbMk7YbH06YYDa+T1tF3eDNgaUa+UHAg=; h=From:To:Date:In-Reply-To:References:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=qcr6iBbg6CeRS1MfyXCrsvqyE2k77cxxRpXDwasvPmDi9gpjHbfZa41II2kON4Tj/ DohKcRu84MGdFTS2VrxsJLQA0z9rMWT5yYatxHScFkn4D5ahYrzZ8ovNTQUyiEPoYC Cp13hWCBkPUQ9SLiAB9L8O5o/5Du15Pw0oYspDAs= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 70B46F80446; Tue, 5 Nov 2019 09:01:45 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 6E7FAF805DF; Tue, 5 Nov 2019 09:01:43 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id C8E2CF800F3 for ; Tue, 5 Nov 2019 09:01:40 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz C8E2CF800F3 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 0FCBCB04F for ; Tue, 5 Nov 2019 08:01:40 +0000 (UTC) From: Takashi Iwai To: alsa-devel@alsa-project.org Date: Tue, 5 Nov 2019 09:01:37 +0100 Message-Id: <20191105080138.1260-4-tiwai@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20191105080138.1260-1-tiwai@suse.de> References: <20191105080138.1260-1-tiwai@suse.de> Subject: [alsa-devel] [PATCH 3/4] ALSA: pcm: Handle special page mapping in the default mmap handler X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 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" When a driver needs to deal with a special buffer like a SG or a vmalloc buffer, it has to set up the PCM page ops explicitly for the corresponding helper function. This is rather error-prone and many people forgot or incorrectly used it. For simplifying the call patterns and avoiding such a potential bug, this patch enhances the PCM default mmap handler to check the (pre-)allocated buffer type and handles the page gracefully depending on the buffer type. If the PCM page ops is given, the ops is still used in a higher priority. The new code path is only for the default (NULL page ops) case. Signed-off-by: Takashi Iwai --- sound/core/pcm_native.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index c3a139436ac2..998c63192ae4 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -3335,7 +3336,18 @@ static inline struct page * snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) { void *vaddr = substream->runtime->dma_area + ofs; - return virt_to_page(vaddr); + + switch (substream->dma_buffer.dev.type) { +#ifdef CONFIG_SND_DMA_SGBUF + case SNDRV_DMA_TYPE_DEV_SG: + case SNDRV_DMA_TYPE_DEV_UC_SG: + return snd_pcm_sgbuf_ops_page(substream, ofs); +#endif /* CONFIG_SND_DMA_SGBUF */ + case SNDRV_DMA_TYPE_VMALLOC: + return vmalloc_to_page(vaddr); + default: + return virt_to_page(vaddr); + } } /*