From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 20 Mar 2025 13:51:45 +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 1tvFNB-001tWB-2w for lore@lore.pengutronix.de; Thu, 20 Mar 2025 13:51:45 +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 1tvFNA-0000YZ-QO for lore@pengutronix.de; Thu, 20 Mar 2025 13:51:45 +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: MIME-Version:Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=zLqNXImzBoXmEAiZ/Y2CFxGUkv9KASlwiy1/0S1eXZY=; b=4KoWpzCGGM+OK4g5jtzlJhp/tJ CDy4SbqgxSAYzxI6QX2UVPOqzZ5Ohi+LlJfmUJcR91HCvbJBC0x0Lvhau6PZqVjwPJWQ1P/T7UAoi lCG01ky+WTmWODEofNmAaX4XCbQeMgGFFgSHj3HkwWA2XrPJUak94umqQimLBcXkdRNhCnsmn2Egs eCiaOh5oCEwFGFbNN0Qd0+WoHrnZSDJ+m6Db2jeunykPeE6Ds5jXKEwq5I2jeNazUtBOD2rAxJA+W WY1o8fzVfQHqwO6/cbqKbjm0r9kH51LlgfZE94qs5R30v5lqOPFhAO/qPxTIg0ogJhHp1V3H270qR i2BAIHKQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tvFMg-0000000C9HO-2QdB; Thu, 20 Mar 2025 12:51:14 +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 1tvFMe-0000000C9H4-1q34 for barebox@lists.infradead.org; Thu, 20 Mar 2025 12:51:13 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1tvFMd-0000P8-5d; Thu, 20 Mar 2025 13:51:11 +0100 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tvFMc-000lEh-1o; Thu, 20 Mar 2025 13:51:10 +0100 Received: from localhost ([::1] helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1tvFMc-000sqV-2o; Thu, 20 Mar 2025 13:51:10 +0100 From: Sascha Hauer To: Barebox List Date: Thu, 20 Mar 2025 13:51:09 +0100 Message-Id: <20250320125109.210820-1-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.39.5 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250320_055112_472323_842041C3 X-CRM114-Status: GOOD ( 10.76 ) 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: [PATCH v2] 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) Add dma_map_buf_is_aligned() which can be used to check if a buffer is sufficiently aligned for DMA. Link: https://lore.kernel.org/r/20250320120907.204013-1-s.hauer@pengutronix.de Signed-off-by: Sascha Hauer --- Changes since v2: - make buf argument const - use PTR_IS_ALIGNED for pointer checking --- include/dma.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/dma.h b/include/dma.h index 5877f4b13c..cb44963cc0 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, const void *buf, size_t size) +{ + return PTR_IS_ALIGNED(buf, ARCH_DMA_MINALIGN) && + IS_ALIGNED(size, ARCH_DMA_MINALIGN); +} #endif /* __DMA_H */ -- 2.39.5