From patchwork Fri Jun 16 18:10:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 9793039 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BF42660325 for ; Fri, 16 Jun 2017 18:22:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA7FE28538 for ; Fri, 16 Jun 2017 18:22:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AE95C2866C; Fri, 16 Jun 2017 18:22:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 06E7228625 for ; Fri, 16 Jun 2017 18:22:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753155AbdFPSW1 (ORCPT ); Fri, 16 Jun 2017 14:22:27 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:38528 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752988AbdFPSM1 (ORCPT ); Fri, 16 Jun 2017 14:12:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=UpkgGwuwItt4QuRFXbLZqM0hROek/SC1Yd8LK8nr0CI=; b=Z5wAgr8CoUDXI3jWyDTuz+iNz yYDBiKK0OjhKglvwQOHvn/OcAw4A9hKwE1WocesESlqTomulOrZV8g58KgejoF6Wfv3SLRgc0oiEw 26y3+7b/roWyWu6YXb0rShSwVbkw/bwob9/ShjZSKi8AB2fKFLFLH56gY3S3C5wdfPHM3TAKkOC5Z aQ9VuBRjqzbW2DqJYE+3be+Bm4ITLx7eBvdZhZxOD4xAyhkTizfJ1J4BQAaNo1HOgSrpYpGy2Kv7n RuOA3IoT+q+iZhDh5BREf+B1lRoxXigfIeSH/GKC1FRJpBJRXt7cof6ck4Xmzn87wuDUMwNTj1eVU Cy7JjyczQ==; Received: from clnet-p099-196.ikbnet.co.at ([83.175.99.196] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.87 #1 (Red Hat Linux)) id 1dLvjF-0005XK-R6; Fri, 16 Jun 2017 18:12:18 +0000 From: Christoph Hellwig To: x86@kernel.org, linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@linux-mips.org, openrisc@lists.librecores.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, dmaengine@vger.kernel.org, linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, iommu@lists.linux-foundation.org, netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 20/44] sparc: implement ->mapping_error Date: Fri, 16 Jun 2017 20:10:35 +0200 Message-Id: <20170616181059.19206-21-hch@lst.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170616181059.19206-1-hch@lst.de> References: <20170616181059.19206-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP DMA_ERROR_CODE is going to go away, so don't rely on it. Signed-off-by: Christoph Hellwig Acked-by: David S. Miller --- arch/sparc/include/asm/dma-mapping.h | 2 -- arch/sparc/kernel/iommu.c | 12 +++++++++--- arch/sparc/kernel/iommu_common.h | 2 ++ arch/sparc/kernel/pci_sun4v.c | 14 ++++++++++---- 4 files changed, 21 insertions(+), 9 deletions(-) diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h index 69cc627779f2..b8e8dfcd065d 100644 --- a/arch/sparc/include/asm/dma-mapping.h +++ b/arch/sparc/include/asm/dma-mapping.h @@ -5,8 +5,6 @@ #include #include -#define DMA_ERROR_CODE (~(dma_addr_t)0x0) - #define HAVE_ARCH_DMA_SUPPORTED 1 int dma_supported(struct device *dev, u64 mask); diff --git a/arch/sparc/kernel/iommu.c b/arch/sparc/kernel/iommu.c index c63ba99ca551..dafa316d978d 100644 --- a/arch/sparc/kernel/iommu.c +++ b/arch/sparc/kernel/iommu.c @@ -314,7 +314,7 @@ static dma_addr_t dma_4u_map_page(struct device *dev, struct page *page, bad_no_ctx: if (printk_ratelimit()) WARN_ON(1); - return DMA_ERROR_CODE; + return SPARC_MAPPING_ERROR; } static void strbuf_flush(struct strbuf *strbuf, struct iommu *iommu, @@ -547,7 +547,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist, if (outcount < incount) { outs = sg_next(outs); - outs->dma_address = DMA_ERROR_CODE; + outs->dma_address = SPARC_MAPPING_ERROR; outs->dma_length = 0; } @@ -573,7 +573,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist, iommu_tbl_range_free(&iommu->tbl, vaddr, npages, IOMMU_ERROR_CODE); - s->dma_address = DMA_ERROR_CODE; + s->dma_address = SPARC_MAPPING_ERROR; s->dma_length = 0; } if (s == outs) @@ -741,6 +741,11 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev, spin_unlock_irqrestore(&iommu->lock, flags); } +static int dma_4u_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr == SPARC_MAPPING_ERROR; +} + static const struct dma_map_ops sun4u_dma_ops = { .alloc = dma_4u_alloc_coherent, .free = dma_4u_free_coherent, @@ -750,6 +755,7 @@ static const struct dma_map_ops sun4u_dma_ops = { .unmap_sg = dma_4u_unmap_sg, .sync_single_for_cpu = dma_4u_sync_single_for_cpu, .sync_sg_for_cpu = dma_4u_sync_sg_for_cpu, + .mapping_error = dma_4u_mapping_error, }; const struct dma_map_ops *dma_ops = &sun4u_dma_ops; diff --git a/arch/sparc/kernel/iommu_common.h b/arch/sparc/kernel/iommu_common.h index 828493329f68..5ea5c192b1d9 100644 --- a/arch/sparc/kernel/iommu_common.h +++ b/arch/sparc/kernel/iommu_common.h @@ -47,4 +47,6 @@ static inline int is_span_boundary(unsigned long entry, return iommu_is_span_boundary(entry, nr, shift, boundary_size); } +#define SPARC_MAPPING_ERROR (~(dma_addr_t)0x0) + #endif /* _IOMMU_COMMON_H */ diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c index 68bec7c97cb8..8e2a56f4c03a 100644 --- a/arch/sparc/kernel/pci_sun4v.c +++ b/arch/sparc/kernel/pci_sun4v.c @@ -412,12 +412,12 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page, bad: if (printk_ratelimit()) WARN_ON(1); - return DMA_ERROR_CODE; + return SPARC_MAPPING_ERROR; iommu_map_fail: local_irq_restore(flags); iommu_tbl_range_free(tbl, bus_addr, npages, IOMMU_ERROR_CODE); - return DMA_ERROR_CODE; + return SPARC_MAPPING_ERROR; } static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr, @@ -590,7 +590,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, if (outcount < incount) { outs = sg_next(outs); - outs->dma_address = DMA_ERROR_CODE; + outs->dma_address = SPARC_MAPPING_ERROR; outs->dma_length = 0; } @@ -607,7 +607,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, iommu_tbl_range_free(tbl, vaddr, npages, IOMMU_ERROR_CODE); /* XXX demap? XXX */ - s->dma_address = DMA_ERROR_CODE; + s->dma_address = SPARC_MAPPING_ERROR; s->dma_length = 0; } if (s == outs) @@ -669,6 +669,11 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist, local_irq_restore(flags); } +static int dma_4v_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr == SPARC_MAPPING_ERROR; +} + static const struct dma_map_ops sun4v_dma_ops = { .alloc = dma_4v_alloc_coherent, .free = dma_4v_free_coherent, @@ -676,6 +681,7 @@ static const struct dma_map_ops sun4v_dma_ops = { .unmap_page = dma_4v_unmap_page, .map_sg = dma_4v_map_sg, .unmap_sg = dma_4v_unmap_sg, + .mapping_error = dma_4v_mapping_error, }; static void pci_sun4v_scan_bus(struct pci_pbm_info *pbm, struct device *parent)