From patchwork Mon Oct 16 05:47:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13422529 X-Patchwork-Delegate: geert@linux-m68k.org 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15A46C46CA1 for ; Mon, 16 Oct 2023 05:48:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229686AbjJPFsq (ORCPT ); Mon, 16 Oct 2023 01:48:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231783AbjJPFsn (ORCPT ); Mon, 16 Oct 2023 01:48:43 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B222F7; Sun, 15 Oct 2023 22:48:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=Y9DUw/dY172Zls+LRmOYmL30GnIrMabtQP9ggTJL0d8=; b=RE1OhfRU8CYhr7JH6VVDgiplTC gjX3zJyGEe0eyRXQO2v84UfNP9kxd+gvBYj5cYvHZT5Hb+C2bWuiL0Eq5T/MRz9Z1X20ZWW/Rj0GD ffAoypglXTNsoXYikcZIoJIoBCqHijes44y3x10ny1i8ygX5UJPTC/XbxlsGIHa+AQ1fZlD73wnj4 fB7uqpCtygxiNMPuHVhF0NHZwH5r9ICNexDt6VFaWcV0KKrhy/Or1+JbMw3ms9w8qvyUOKCKicOc8 gHFF2aJrnlt1sG87jjJdVY2r7Y4x2GdxUDJ70y/AMRNQWEmzwWa7kZpPe3qLM9E60mv5FbBsQF1vv 5gp46UxA==; Received: from 2a02-8389-2341-5b80-39d3-4735-9a3c-88d8.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:39d3:4735:9a3c:88d8] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1qsGSo-008Qyh-10; Mon, 16 Oct 2023 05:48:26 +0000 From: Christoph Hellwig To: Greg Ungerer , iommu@lists.linux.dev Cc: Paul Walmsley , Palmer Dabbelt , Conor Dooley , Geert Uytterhoeven , Magnus Damm , Robin Murphy , Marek Szyprowski , Geert Uytterhoeven , Wei Fang , Shenwei Wang , Clark Wang , NXP Linux Team , linux-m68k@lists.linux-m68k.org, netdev@vger.kernel.org, linux-riscv@lists.infradead.org, linux-renesas-soc@vger.kernel.org, Jim Quinlan Subject: [PATCH 11/12] m68k: don't provide arch_dma_alloc for nommu/coldfire Date: Mon, 16 Oct 2023 07:47:53 +0200 Message-Id: <20231016054755.915155-12-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231016054755.915155-1-hch@lst.de> References: <20231016054755.915155-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Coldfire cores configured with a data cache can't provide coherent DMA allocations at all. Instead of returning non-coherent kernel memory in this case, return NULL and fail the allocation. The only driver that used to rely on the previous behavior (fec) has been switched to use non-coherent allocations for this case recently. Signed-off-by: Christoph Hellwig --- arch/m68k/Kconfig | 1 - arch/m68k/kernel/dma.c | 23 ----------------------- 2 files changed, 24 deletions(-) diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index 6c585eae89f4dc..c1c0faffb0d413 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -3,7 +3,6 @@ config M68K bool default y select ARCH_32BIT_OFF_T - select ARCH_DMA_ALLOC if M68K_NONCOHERENT_DMA && COLDFIRE select ARCH_HAS_BINFMT_FLAT select ARCH_HAS_CPU_FINALIZE_INIT if MMU select ARCH_HAS_CURRENT_STACK_POINTER diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c index f83870cfa79b37..eef63d032abb53 100644 --- a/arch/m68k/kernel/dma.c +++ b/arch/m68k/kernel/dma.c @@ -33,29 +33,6 @@ pgprot_t pgprot_dmacoherent(pgprot_t prot) } return prot; } -#else -void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, - gfp_t gfp, unsigned long attrs) -{ - void *ret; - - if (dev == NULL || (*dev->dma_mask < 0xffffffff)) - gfp |= GFP_DMA; - ret = (void *)__get_free_pages(gfp, get_order(size)); - - if (ret != NULL) { - memset(ret, 0, size); - *dma_handle = virt_to_phys(ret); - } - return ret; -} - -void arch_dma_free(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle, unsigned long attrs) -{ - free_pages((unsigned long)vaddr, get_order(size)); -} - #endif /* CONFIG_MMU && !CONFIG_COLDFIRE */ void arch_sync_dma_for_device(phys_addr_t handle, size_t size,