From patchwork Thu Aug 29 18:32:28 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 2851566 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 708969F485 for ; Thu, 29 Aug 2013 18:54:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 88E5E20595 for ; Thu, 29 Aug 2013 18:54:05 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2A47E20594 for ; Thu, 29 Aug 2013 18:54:04 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VF744-0006MU-5W; Thu, 29 Aug 2013 18:35:29 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VF73I-0004j1-VB; Thu, 29 Aug 2013 18:34:41 +0000 Received: from smtp.citrix.com ([66.165.176.89]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VF725-0004at-0b for linux-arm-kernel@lists.infradead.org; Thu, 29 Aug 2013 18:33:27 +0000 X-IronPort-AV: E=Sophos;i="4.89,984,1367971200"; d="scan'208";a="48860320" Received: from accessns.citrite.net (HELO FTLPEX01CL03.citrite.net) ([10.9.154.239]) by FTLPIPO01.CITRIX.COM with ESMTP; 29 Aug 2013 18:32:53 +0000 Received: from ukmail1.uk.xensource.com (10.80.16.128) by smtprelay.citrix.com (10.13.107.80) with Microsoft SMTP Server id 14.2.342.4; Thu, 29 Aug 2013 14:32:51 -0400 Received: from kaball.uk.xensource.com ([10.80.2.59]) by ukmail1.uk.xensource.com with esmtp (Exim 4.69) (envelope-from ) id 1VF71S-0008Qk-OX; Thu, 29 Aug 2013 19:32:46 +0100 From: Stefano Stabellini To: Subject: [PATCH v5 07/13] xen: make xen_create_contiguous_region return the dma address Date: Thu, 29 Aug 2013 19:32:28 +0100 Message-ID: <1377801154-29215-7-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-DLP: MIA2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130829_143325_288519_4F11FC89 X-CRM114-Status: GOOD ( 10.87 ) X-Spam-Score: -9.4 (---------) Cc: Ian.Campbell@citrix.com, Stefano Stabellini , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, konrad.wilk@oracle.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Modify xen_create_contiguous_region to return the dma address of the newly contiguous buffer. Signed-off-by: Stefano Stabellini Reviewed-by: David Vrabel Changes in v4: - use virt_to_machine instead of virt_to_bus. --- arch/x86/xen/mmu.c | 4 +++- drivers/xen/swiotlb-xen.c | 6 +++--- include/xen/xen-ops.h | 3 ++- 3 files changed, 8 insertions(+), 5 deletions(-) diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index fdc3ba2..6c34d7c 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -2329,7 +2329,8 @@ static int xen_exchange_memory(unsigned long extents_in, unsigned int order_in, } int xen_create_contiguous_region(unsigned long vstart, unsigned int order, - unsigned int address_bits) + unsigned int address_bits, + dma_addr_t *dma_handle) { unsigned long *in_frames = discontig_frames, out_frame; unsigned long flags; @@ -2368,6 +2369,7 @@ int xen_create_contiguous_region(unsigned long vstart, unsigned int order, spin_unlock_irqrestore(&xen_reservation_lock, flags); + *dma_handle = virt_to_machine(vstart).maddr; return success ? 0 : -ENOMEM; } EXPORT_SYMBOL_GPL(xen_create_contiguous_region); diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 1b2277c..b72f31c 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -126,6 +126,7 @@ xen_swiotlb_fixup(void *buf, size_t size, unsigned long nslabs) { int i, rc; int dma_bits; + dma_addr_t dma_handle; dma_bits = get_order(IO_TLB_SEGSIZE << IO_TLB_SHIFT) + PAGE_SHIFT; @@ -137,7 +138,7 @@ xen_swiotlb_fixup(void *buf, size_t size, unsigned long nslabs) rc = xen_create_contiguous_region( (unsigned long)buf + (i << IO_TLB_SHIFT), get_order(slabs << IO_TLB_SHIFT), - dma_bits); + dma_bits, &dma_handle); } while (rc && dma_bits++ < max_dma_bits); if (rc) return rc; @@ -294,11 +295,10 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, *dma_handle = dev_addr; else { if (xen_create_contiguous_region(vstart, order, - fls64(dma_mask)) != 0) { + fls64(dma_mask), dma_handle) != 0) { free_pages(vstart, order); return NULL; } - *dma_handle = virt_to_machine(ret).maddr; } memset(ret, 0, size); return ret; diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h index d6fe062..9ef704d 100644 --- a/include/xen/xen-ops.h +++ b/include/xen/xen-ops.h @@ -20,7 +20,8 @@ int xen_setup_shutdown_event(void); extern unsigned long *xen_contiguous_bitmap; int xen_create_contiguous_region(unsigned long vstart, unsigned int order, - unsigned int address_bits); + unsigned int address_bits, + dma_addr_t *dma_handle); void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order);