From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 20 Mar 2025 13:37:41 +0100 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tvF9Z-001tFs-1o for lore@lore.pengutronix.de; Thu, 20 Mar 2025 13:37:41 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1tvF9Y-0005lp-FH for lore@pengutronix.de; Thu, 20 Mar 2025 13:37:40 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=UbOAzm2I7mKBrksevNz6nkVwUK8F6j6cPy+hP5xSj9E=; b=Ug3D3yGRh6VFigt5ja+c0gMI6G WFTnw0lGum4Ybu4cd2l0OMETN2KJO0i0BufriT0zviZB2RNXJo4n/2/02XdOn1LBI60cZrmuxgVR8 b7t643wxA4T4mv9lIS80khIln7zeKAJUgSRrWTFLnUNTUnXjRJb6g+5Nl9otCDKkJtbSxX4TVqNhK 3muTZtVtmZFZ+ebpkmOmS9eW6jBzJ8dvSLdWMggRf+3PRqZh+198ev38M4vDWeIyIUre4tB5fBqVq Ic1GTaQiHijc3vxAyKNvyWpItfcwWQ1y4sohCvdCtpsqwL3ds1X73D3L15D4McdjWQcrXohYdIMZz EdvrI5Aw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tvF95-0000000C89L-1eWE; Thu, 20 Mar 2025 12:37:11 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tvF92-0000000C88i-3rEn for barebox@lists.infradead.org; Thu, 20 Mar 2025 12:37:09 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=[127.0.0.1]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1tvF8z-0005YU-Kt; Thu, 20 Mar 2025 13:37:05 +0100 Message-ID: <59323f53-9587-4e6c-a010-fca15789656b@pengutronix.de> Date: Thu, 20 Mar 2025 13:37:03 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Sascha Hauer , Barebox List References: <20250320120907.204013-1-s.hauer@pengutronix.de> Content-Language: en-US, de-DE, de-BE From: Ahmad Fatoum In-Reply-To: <20250320120907.204013-1-s.hauer@pengutronix.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250320_053708_959621_C728D193 X-CRM114-Status: GOOD ( 13.90 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.4 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH] dma: add function to check a buffer for proper DMA alignment X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Hello Sascha, On 3/20/25 13:09, Sascha Hauer wrote: > Add dma_map_buf_is_aligned() which can be used to check if a buffer is > sufficiently aligned for DMA. > > Signed-off-by: Sascha Hauer > --- > include/dma.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/include/dma.h b/include/dma.h > index 5877f4b13c..41eeacc478 100644 > --- a/include/dma.h > +++ b/include/dma.h > @@ -141,4 +141,9 @@ void dma_free_coherent(struct device *dev, void *mem, dma_addr_t dma_handle, siz > void *dma_alloc_writecombine(struct device *dev, size_t size, dma_addr_t *dma_handle); > #endif > > +static inline bool dma_map_buf_is_aligned(struct device *dev, void *buf, size_t size) const void *. So we don't need to case twice; once here and once at dma_map time. > +{ > + return IS_ALIGNED((uintptr_t)buf, ARCH_DMA_MINALIGN) && PTR_IS_ALIGNED Thanks, Ahmad > + IS_ALIGNED(size, ARCH_DMA_MINALIGN); > +} > #endif /* __DMA_H */