From patchwork Tue Jun 7 07:54:09 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Niklas_S=C3=B6derlund?= X-Patchwork-Id: 9160029 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 98C5B60572 for ; Tue, 7 Jun 2016 07:57:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8A21426861 for ; Tue, 7 Jun 2016 07:57:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7ECAF2793B; Tue, 7 Jun 2016 07:57:25 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 081EB26861 for ; Tue, 7 Jun 2016 07:57:25 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1bABrk-0002HC-Kw; Tue, 07 Jun 2016 07:56:00 +0000 Received: from smtp-3.sys.kth.se ([2001:6b0:1:1300:250:56ff:fea6:2de2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1bABr3-0000pf-5u for linux-arm-kernel@lists.infradead.org; Tue, 07 Jun 2016 07:55:21 +0000 Received: from smtp-3.sys.kth.se (localhost.localdomain [127.0.0.1]) by smtp-3.sys.kth.se (Postfix) with ESMTP id 1BFA42B05; Tue, 7 Jun 2016 09:54:55 +0200 (CEST) X-Virus-Scanned: by amavisd-new at kth.se Received: from smtp-3.sys.kth.se ([127.0.0.1]) by smtp-3.sys.kth.se (smtp-3.sys.kth.se [127.0.0.1]) (amavisd-new, port 10024) with LMTP id Z5i1gD2pEPq1; Tue, 7 Jun 2016 09:54:54 +0200 (CEST) X-KTH-Auth: niso [89.233.230.99] X-KTH-mail-from: niklas.soderlund+renesas@ragnatech.se Received: from bismarck.berto.se (dynamic.0.6.79d1f80.14cc20ac3a53.cust.bredband2.com [89.233.230.99]) by smtp-3.sys.kth.se (Postfix) with ESMTPSA id E4AD329F6; Tue, 7 Jun 2016 09:54:53 +0200 (CEST) From: =?UTF-8?q?Niklas=20S=C3=B6derlund?= To: linux-renesas-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org, iommu@lists.linux-foundation.org, linux@armlinux.org.uk Subject: [PATCHv8 2/6] dma-debug: add support for resource mappings Date: Tue, 7 Jun 2016 09:54:09 +0200 Message-Id: <1465286053-27258-3-git-send-email-niklas.soderlund+renesas@ragnatech.se> X-Mailer: git-send-email 2.8.2 In-Reply-To: <1465286053-27258-1-git-send-email-niklas.soderlund+renesas@ragnatech.se> References: <1465286053-27258-1-git-send-email-niklas.soderlund+renesas@ragnatech.se> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160607_005517_704283_89F7DD09 X-CRM114-Status: GOOD ( 11.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Niklas=20S=C3=B6derlund?= , arnd@arndb.de, vinod.koul@intel.com, linus.walleij@linaro.org, hch@infradead.org, laurent.pinchart@ideasonboard.com, dan.j.williams@intel.com, robin.murphy@arm.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP A MMIO mapped resource can not be represented by a struct page so a new debug type is needed to handle this. This patch add such type and functionality to add/remove entries and how to translate them to a physical address. Signed-off-by: Niklas Söderlund --- include/linux/dma-debug.h | 19 +++++++++++++++++ lib/dma-debug.c | 52 +++++++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 69 insertions(+), 2 deletions(-) diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h index fe8cb61..c7d844f 100644 --- a/include/linux/dma-debug.h +++ b/include/linux/dma-debug.h @@ -56,6 +56,13 @@ extern void debug_dma_alloc_coherent(struct device *dev, size_t size, extern void debug_dma_free_coherent(struct device *dev, size_t size, void *virt, dma_addr_t addr); +extern void debug_dma_map_resource(struct device *dev, phys_addr_t addr, + size_t size, int direction, + dma_addr_t dma_addr); + +extern void debug_dma_unmap_resource(struct device *dev, dma_addr_t dma_addr, + size_t size, int direction); + extern void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, int direction); @@ -141,6 +148,18 @@ static inline void debug_dma_free_coherent(struct device *dev, size_t size, { } +static inline void debug_dma_map_resource(struct device *dev, phys_addr_t addr, + size_t size, int direction, + dma_addr_t dma_addr) +{ +} + +static inline void debug_dma_unmap_resource(struct device *dev, + dma_addr_t dma_addr, size_t size, + int direction) +{ +} + static inline void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, int direction) diff --git a/lib/dma-debug.c b/lib/dma-debug.c index 51a76af..ce75fba 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -43,6 +43,7 @@ enum { dma_debug_page, dma_debug_sg, dma_debug_coherent, + dma_debug_resource, }; enum map_err_types { @@ -150,8 +151,9 @@ static const char *const maperr2str[] = { [MAP_ERR_CHECKED] = "dma map error checked", }; -static const char *type2name[4] = { "single", "page", - "scather-gather", "coherent" }; +static const char *type2name[5] = { "single", "page", + "scather-gather", "coherent", + "resource" }; static const char *dir2name[4] = { "DMA_BIDIRECTIONAL", "DMA_TO_DEVICE", "DMA_FROM_DEVICE", "DMA_NONE" }; @@ -397,6 +399,9 @@ static void hash_bucket_del(struct dma_debug_entry *entry) static unsigned long long phys_addr(struct dma_debug_entry *entry) { + if (entry->type == dma_debug_resource) + return __pfn_to_phys(entry->pfn) + entry->offset; + return page_to_phys(pfn_to_page(entry->pfn)) + entry->offset; } @@ -1493,6 +1498,49 @@ void debug_dma_free_coherent(struct device *dev, size_t size, } EXPORT_SYMBOL(debug_dma_free_coherent); +void debug_dma_map_resource(struct device *dev, phys_addr_t addr, size_t size, + int direction, dma_addr_t dma_addr) +{ + struct dma_debug_entry *entry; + + if (unlikely(dma_debug_disabled())) + return; + + entry = dma_entry_alloc(); + if (!entry) + return; + + entry->type = dma_debug_resource; + entry->dev = dev; + entry->pfn = __phys_to_pfn(addr); + entry->offset = offset_in_page(addr); + entry->size = size; + entry->dev_addr = dma_addr; + entry->direction = direction; + entry->map_err_type = MAP_ERR_NOT_CHECKED; + + add_dma_entry(entry); +} +EXPORT_SYMBOL(debug_dma_map_resource); + +void debug_dma_unmap_resource(struct device *dev, dma_addr_t dma_addr, + size_t size, int direction) +{ + struct dma_debug_entry ref = { + .type = dma_debug_resource, + .dev = dev, + .dev_addr = dma_addr, + .size = size, + .direction = direction, + }; + + if (unlikely(dma_debug_disabled())) + return; + + check_unmap(&ref); +} +EXPORT_SYMBOL(debug_dma_unmap_resource); + void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, int direction) {