From patchwork Tue Dec 6 11:01:23 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 129628 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 72E581007D6 for ; Tue, 6 Dec 2011 22:21:30 +1100 (EST) Received: from localhost ([::1]:34325 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RXt5P-0006sX-Cj for incoming@patchwork.ozlabs.org; Tue, 06 Dec 2011 06:21:23 -0500 Received: from eggs.gnu.org ([140.186.70.92]:52984) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RXt5H-0006rf-9v for qemu-devel@nongnu.org; Tue, 06 Dec 2011 06:21:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RXt5A-0000On-5X for qemu-devel@nongnu.org; Tue, 06 Dec 2011 06:21:15 -0500 Received: from mail-qy0-f173.google.com ([209.85.216.173]:34413) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RXt5A-0000Of-19 for qemu-devel@nongnu.org; Tue, 06 Dec 2011 06:21:08 -0500 Received: by qcsd15 with SMTP id d15so2794225qcs.4 for ; Tue, 06 Dec 2011 03:21:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=sender:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references; bh=QM63staFdcKaGrh7X2a2xMqiL8XDWWTU/Zt9M+uS6so=; b=kf4SQ5Dfc0wafAy8klE9Q/hJO3BFUqXMpvOmbnhzivYkR+lqNXQ/9zOQTaq7t9CF3O oLV1pj/fqYhYXKK8nWOJaru+QRuCY8bTNl5Pgo08fBNQtMgJ8e226JiOLJee2O6srym5 qOa7asn5UByGnBSN/bWNunXHTBdqoVmwjSzk8= Received: by 10.50.15.134 with SMTP id x6mr2543779igc.51.1323169310781; Tue, 06 Dec 2011 03:01:50 -0800 (PST) Received: from localhost.localdomain (93-34-178-147.ip50.fastwebnet.it. [93.34.178.147]) by mx.google.com with ESMTPS id a2sm48932443igj.7.2011.12.06.03.01.48 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 06 Dec 2011 03:01:49 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Date: Tue, 6 Dec 2011 12:01:23 +0100 Message-Id: <1323169292-21661-3-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.7.7.1 In-Reply-To: <1323169292-21661-1-git-send-email-pbonzini@redhat.com> References: <1323169292-21661-1-git-send-email-pbonzini@redhat.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 209.85.216.173 Cc: stefanha@linux.vnet.ibm.com Subject: [Qemu-devel] [PATCH 02/11] dma-helpers: make QEMUSGList target independent X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This lets scsi-* observe the overall s/g list and pass it to the DMA helpers. size_t can potentially be smaller than dma_addr_t. However, the overall size of a S/G list can actually be bigger than dma_addr_t because (for writes) you could reuse the same buffer multiple times. So there is no difference in practice. Signed-off-by: Paolo Bonzini --- dma.h | 14 +++++++------- 1 files changed, 7 insertions(+), 7 deletions(-) diff --git a/dma.h b/dma.h index a13209d..d50019b 100644 --- a/dma.h +++ b/dma.h @@ -17,6 +17,13 @@ typedef struct ScatterGatherEntry ScatterGatherEntry; +struct QEMUSGList { + ScatterGatherEntry *sg; + int nsg; + int nalloc; + size_t size; +}; + #if defined(TARGET_PHYS_ADDR_BITS) typedef target_phys_addr_t dma_addr_t; @@ -32,13 +39,6 @@ struct ScatterGatherEntry { dma_addr_t len; }; -struct QEMUSGList { - ScatterGatherEntry *sg; - int nsg; - int nalloc; - dma_addr_t size; -}; - void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint); void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len); void qemu_sglist_destroy(QEMUSGList *qsg);