From patchwork Wed Apr 15 05:51:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Klaus Jensen X-Patchwork-Id: 11489845 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5644D1392 for ; Wed, 15 Apr 2020 06:12:55 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 34CC820737 for ; Wed, 15 Apr 2020 06:12:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 34CC820737 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=irrelevant.dk Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:43888 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jObI6-0005RY-AY for patchwork-qemu-devel@patchwork.kernel.org; Wed, 15 Apr 2020 02:12:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35621) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jOaz2-0002u2-2r for qemu-devel@nongnu.org; Wed, 15 Apr 2020 01:53:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jOaz0-0002ri-Fc for qemu-devel@nongnu.org; Wed, 15 Apr 2020 01:53:11 -0400 Received: from charlie.dont.surf ([128.199.63.193]:47584) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jOayw-0002bH-Ht; Wed, 15 Apr 2020 01:53:06 -0400 Received: from apples.local (80-167-98-190-cable.dk.customer.tdc.net [80.167.98.190]) by charlie.dont.surf (Postfix) with ESMTPSA id 08180BFDDE; Wed, 15 Apr 2020 05:52:32 +0000 (UTC) From: Klaus Jensen To: qemu-block@nongnu.org Subject: [PATCH v7 38/48] nvme: use preallocated qsg/iov in nvme_dma_prp Date: Wed, 15 Apr 2020 07:51:30 +0200 Message-Id: <20200415055140.466900-39-its@irrelevant.dk> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200415055140.466900-1-its@irrelevant.dk> References: <20200415055140.466900-1-its@irrelevant.dk> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 128.199.63.193 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Beata Michalska , Klaus Jensen , qemu-devel@nongnu.org, Max Reitz , Klaus Jensen , Keith Busch , Javier Gonzalez , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Klaus Jensen Since clean up of the request qsg/iov has been moved to the common nvme_enqueue_req_completion function, there is no need to use a stack allocated qsg/iov in nvme_dma_prp. Signed-off-by: Klaus Jensen Acked-by: Keith Busch Reviewed-by: Maxim Levitsky --- hw/block/nvme.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index ffc49985321b..eb15a0bd3cf9 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -346,45 +346,39 @@ static uint16_t nvme_dma_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len, uint64_t prp1, uint64_t prp2, DMADirection dir, NvmeRequest *req) { - QEMUSGList qsg; - QEMUIOVector iov; uint16_t status = NVME_SUCCESS; - status = nvme_map_prp(n, &qsg, &iov, prp1, prp2, len, req); + status = nvme_map_prp(n, &req->qsg, &req->iov, prp1, prp2, len, req); if (status) { return status; } - if (qsg.nsg > 0) { + if (req->qsg.nsg > 0) { uint64_t residual; if (dir == DMA_DIRECTION_TO_DEVICE) { - residual = dma_buf_write(ptr, len, &qsg); + residual = dma_buf_write(ptr, len, &req->qsg); } else { - residual = dma_buf_read(ptr, len, &qsg); + residual = dma_buf_read(ptr, len, &req->qsg); } if (unlikely(residual)) { trace_nvme_dev_err_invalid_dma(); status = NVME_INVALID_FIELD | NVME_DNR; } - - qemu_sglist_destroy(&qsg); } else { size_t bytes; if (dir == DMA_DIRECTION_TO_DEVICE) { - bytes = qemu_iovec_to_buf(&iov, 0, ptr, len); + bytes = qemu_iovec_to_buf(&req->iov, 0, ptr, len); } else { - bytes = qemu_iovec_from_buf(&iov, 0, ptr, len); + bytes = qemu_iovec_from_buf(&req->iov, 0, ptr, len); } if (unlikely(bytes != len)) { trace_nvme_dev_err_invalid_dma(); status = NVME_INVALID_FIELD | NVME_DNR; } - - qemu_iovec_destroy(&iov); } return status;