From patchwork Fri Feb 23 08:27:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 13568677 Received: from out30-112.freemail.mail.aliyun.com (out30-112.freemail.mail.aliyun.com [115.124.30.112]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DEF6B48CDD; Fri, 23 Feb 2024 08:27:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.112 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708676882; cv=none; b=aYqNSXuMqz5W7n2/OuSTxY2p1QlD/zaCCZQZGmQ/5O2RqZIwttE/62/mMzzReGByCORpGk/4Wpm/+r3ADOVpJya8hmYDsq794XDRRwl8A6ZQHN9QQpcXDnbGZf8PM1i5A1EebWQrKdn6nd/vvUxGBjaOmH3ZhRTUJLZIioIy0xc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708676882; c=relaxed/simple; bh=pjonLh8exRbdrHMa17jNGBBGqb3zvIrKACq7Hq9u+NM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=k0/D2ZXCY34qooD/5Vp8chimdrUV4SKDiMaqaCKTPvbMAXWtJCp5O6233HRoS+ZIw5uzo31EVlGkk66EFWFc2RDD3/pJPUY1R6RKv/RrDxhhPaYz+zk4qbf41t+ezkmn24M3bbZUCDCEcxZoBHRpbVWybCGLlV6BmvfC5FTYX/A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=TRBKIejS; arc=none smtp.client-ip=115.124.30.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="TRBKIejS" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1708676872; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=MiRsah0os+XN0E37SyZpCu/ggHFN/seKkb4xKfCwkhI=; b=TRBKIejSch6PQgAAAIWInrgB9pcqqGFLPO+D+N42zZaTEQtonpsCQAZrHUe6MNyPLW0sAPzUe07/1Z+4VHwCF2pliK2RfgmN7dfQrlXXDlFTxczdbrESAjudIJtTYZX1O9VEo7QMC7qvDS5ujpZcSSQEiDswWTLwuv/QwNNDLEk= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R211e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045170;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=35;SR=0;TI=SMTPD_---0W13ndPZ_1708676868; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0W13ndPZ_1708676868) by smtp.aliyun-inc.com; Fri, 23 Feb 2024 16:27:49 +0800 From: Xuan Zhuo To: virtualization@lists.linux.dev Cc: Richard Weinberger , Anton Ivanov , Johannes Berg , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Eric Farman , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , linux-um@lists.infradead.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH vhost v2 14/19] virtio_ring: remove api of setting vq premapped Date: Fri, 23 Feb 2024 16:27:21 +0800 Message-Id: <20240223082726.52915-15-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f In-Reply-To: <20240223082726.52915-1-xuanzhuo@linux.alibaba.com> References: <20240223082726.52915-1-xuanzhuo@linux.alibaba.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Git-Hash: 510995f33855 The virtio-net sets the premapped mode by find_vqs(). So the below API is not used by anyone, we remove it. int virtqueue_set_dma_premapped(struct virtqueue *_vq); Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 56 ------------------------------------ include/linux/virtio.h | 2 -- 2 files changed, 58 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 103b06574e8b..63084487c171 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2775,62 +2775,6 @@ int virtqueue_resize(struct virtqueue *_vq, u32 num, } EXPORT_SYMBOL_GPL(virtqueue_resize); -/** - * virtqueue_set_dma_premapped - set the vring premapped mode - * @_vq: the struct virtqueue we're talking about. - * - * Enable the premapped mode of the vq. - * - * The vring in premapped mode does not do dma internally, so the driver must - * do dma mapping in advance. The driver must pass the dma_address through - * dma_address of scatterlist. When the driver got a used buffer from - * the vring, it has to unmap the dma address. - * - * This function must be called immediately after creating the vq, or after vq - * reset, and before adding any buffers to it. - * - * Caller must ensure we don't call this with other virtqueue operations - * at the same time (except where noted). - * - * Returns zero or a negative error. - * 0: success. - * -EINVAL: vring does not use the dma api, so we can not enable premapped mode. - */ -int virtqueue_set_dma_premapped(struct virtqueue *_vq) -{ - struct vring_virtqueue *vq = to_vvq(_vq); - u32 num; - - START_USE(vq); - - num = vq->packed_ring ? vq->packed.vring.num : vq->split.vring.num; - - if (num != vq->vq.num_free) { - END_USE(vq); - return -EINVAL; - } - - if (!vq->use_dma_api) { - END_USE(vq); - return -EINVAL; - } - - vq->vq.premapped = true; - - if (vq->packed_ring) { - kfree(vq->packed.desc_dma); - vq->packed.desc_dma = NULL; - } else { - kfree(vq->split.desc_dma); - vq->split.desc_dma = NULL; - } - - END_USE(vq); - - return 0; -} -EXPORT_SYMBOL_GPL(virtqueue_set_dma_premapped); - /** * virtqueue_reset - detach and recycle all unused buffers * @_vq: the struct virtqueue we're talking about. diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 407277d5a16b..2167893313f6 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -82,8 +82,6 @@ bool virtqueue_enable_cb(struct virtqueue *vq); unsigned virtqueue_enable_cb_prepare(struct virtqueue *vq); -int virtqueue_set_dma_premapped(struct virtqueue *_vq); - bool virtqueue_poll(struct virtqueue *vq, unsigned); bool virtqueue_enable_cb_delayed(struct virtqueue *vq);