From patchwork Tue Jul 18 15:22:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 13318167 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 27EBBEB64DA for ; Wed, 19 Jul 2023 05:20:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5HX3X/z3ovKQoQ1qMH+FR4whcMTcIujsPdjzMwrCd2w=; b=LBRykMwDfH298e pobSRA0ETR/9cBIKFLga+2kzBAOYkVaEc0s4/XaDawAsqWEPJ2xYpZrfPTba4w9m8w412xC8n7AID TxuKiCkWI4lS2wisqkEWqI0Lq0FAaOcqBG74cdycGo7HuVdud740t1t2DLoBQaMOMye7/v40KYCPg KRgAHUUxs+/ZLchFG5xaykh8GUFPaITCyhq+jlaEFHjbmrJwTYg4IeAH12UWlpFD3KbHggsPLOC8U 2IJ9wbHJm8P16m5ASRpMchAszjIvlcDjfNLlq4XuZJtr6t1+HdSv0SJevfhc07OkcNRuPpeApaYoX +3ubTSwCIWO0LsRq+hkw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qLzbQ-005DoQ-1n; Wed, 19 Jul 2023 05:19:56 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qLzbI-005Di0-0h for linux-riscv@bombadil.infradead.org; Wed, 19 Jul 2023 05:19:48 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=zV5zqI83iPv7AITQY55QeT+k9nsbrdlD6lFEUZyFCiE=; b=EQReZD/98wFeKCHeExtmz9X8j9 5ZykumVXSuH4SXyHJAQPNcSUCeOKueQbm4mVFYAaKvgT7AMAZTwr5dMgLlUWwbqL7rXbSf3mPRC4p qtZOjqbDUJT5FDX/GQnA9Viynn6xcSMZCs4wOwO3MKTyRkHbtoRgXiW3Vne1AY9wouHBzckoAsvWv Jr6TJF0rAK0NGeQsTkiER4UtObxtLLNHcGukOfDBJ547IaDmu5JQ4Wph7qXCXhBVdZYSiKc4ttwfu iT9MNCZzu0zKzbpG2xMR9RkNXkDSICIzge7A9hv10PntnetYjjLfU+riRLzY6JZPq83TD914XxHrB 0iDwYhWw==; Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by desiato.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qLmiV-00BhWv-1Z for linux-riscv@lists.infradead.org; Tue, 18 Jul 2023 15:34:25 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 7874E6164B; Tue, 18 Jul 2023 15:33:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BC4A2C433C8; Tue, 18 Jul 2023 15:33:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1689694430; bh=mqwYcIZH+M6h8d7AW+YLg7/JE8kUv6dByMB/fsXMe5E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZauC2YoS57Y7Z75WX93K8wwq6vCm7vKYIrjQ7e1PVKNVB9oFy4zuFqlAHt/o9u8ig +jHL7t3YG0DIEB6aHqFTmfny58qvFcbf5CIXyGWvdZTy1e53lTQ536dn67rE17C/nX tNSMeABCJ0uBzJAhNRUYMbCjBerE73usUmO+jRF0pZkGkqrR+kns0jDAsySb5rrjm0 vJ0c0tNKTFlWD33YC5Vz/yDQMvPds538rFQgalIrZPB3wuBc466LP3kRSqQwFP4Ch0 oEvk6Z0ioJ5Hc+hwquvbxlp6Z83T51FMAMWjgZo4xqIpfbbJNOElQr6m7JucSJtx3Y kYKEx/dV4ZjKQ== From: Jisheng Zhang To: Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Conor Dooley Subject: [PATCH v3 2/2] riscv: enable DMA_BOUNCE_UNALIGNED_KMALLOC for !dma_coherent Date: Tue, 18 Jul 2023 23:22:14 +0800 Message-Id: <20230718152214.2907-3-jszhang@kernel.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230718152214.2907-1-jszhang@kernel.org> References: <20230718152214.2907-1-jszhang@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230718_163423_908564_B869AA05 X-CRM114-Status: GOOD ( 11.09 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org With the DMA bouncing of unaligned kmalloc() buffers now in place, enable it for riscv when RISCV_DMA_NONCOHERENT=y to allow the kmalloc-{8,16,32,96} caches. Since RV32 doesn't enable SWIOTLB yet, and I didn't see any dma noncoherent RV32 platforms in the mainline, so skip RV32 now by only enabling DMA_BOUNCE_UNALIGNED_KMALLOC if SWIOTLB is available. Once we see such requirement on RV32, we can enable it then. NOTE: we didn't force to create the swiotlb buffer even when the end of RAM is within the 32-bit physical address range. That's to say: For RV64 with > 4GB memory, the feature is enabled. For RV64 with <= 4GB memory, the feature isn't enabled by default. We rely on users to pass "swiotlb=mmnn,force" where mmnn is the Number of I/O TLB slabs, see kernel-parameters.txt for details. Tested on Sipeed Lichee Pi 4A with 8GB DDR and Sipeed M1S BL808 Dock board. Signed-off-by: Jisheng Zhang Reviewed-by: Conor Dooley --- arch/riscv/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 4c07b9189c86..6681bd6ed2d7 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -267,6 +267,7 @@ config RISCV_DMA_NONCOHERENT select ARCH_HAS_SETUP_DMA_OPS select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select DMA_BOUNCE_UNALIGNED_KMALLOC if SWIOTLB select DMA_DIRECT_REMAP config AS_HAS_INSN