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Tsirkin" , Eli Cohen , Stefan Hajnoczi , Stefano Garzarella Subject: [PATCH v3 3/6] vdpa: Make vhost_vdpa_net_cvq_map_elem accept any out sg Date: Fri, 22 Jul 2022 10:56:41 +0200 Message-Id: <20220722085644.3376708-4-eperezma@redhat.com> In-Reply-To: <20220722085644.3376708-1-eperezma@redhat.com> References: <20220722085644.3376708-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 Received-SPF: pass client-ip=170.10.133.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" So its generic enough to accept any out sg buffer and we can inject NIC state messages. Signed-off-by: Eugenio Pérez --- net/vhost-vdpa.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 1b82ac2e07..bbe1830824 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -302,35 +302,36 @@ dma_map_err: } /** - * Copy the guest element into a dedicated buffer suitable to be sent to NIC + * Maps out sg and in buffer into dedicated buffers suitable to be sent to NIC * - * @iov: [0] is the out buffer, [1] is the in one + * @dev_iov: [0] is the out buffer, [1] is the in one */ -static bool vhost_vdpa_net_cvq_map_elem(VhostVDPAState *s, - VirtQueueElement *elem, - struct iovec *iov) +static bool vhost_vdpa_net_cvq_map_sg(VhostVDPAState *s, + const struct iovec *out, size_t out_num, + struct iovec *dev_iov) { size_t in_copied; bool ok; - iov[0].iov_base = s->cvq_cmd_out_buffer; - ok = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, elem->out_sg, elem->out_num, - vhost_vdpa_net_cvq_cmd_len(), iov[0].iov_base, - &iov[0].iov_len, false); + dev_iov[0].iov_base = s->cvq_cmd_out_buffer; + ok = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, out, out_num, + vhost_vdpa_net_cvq_cmd_len(), + dev_iov[0].iov_base, &dev_iov[0].iov_len, + false); if (unlikely(!ok)) { return false; } - iov[1].iov_base = s->cvq_cmd_in_buffer; + dev_iov[1].iov_base = s->cvq_cmd_in_buffer; ok = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, NULL, 0, - sizeof(virtio_net_ctrl_ack), iov[1].iov_base, - &in_copied, true); + sizeof(virtio_net_ctrl_ack), + dev_iov[1].iov_base, &in_copied, true); if (unlikely(!ok)) { vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); return false; } - iov[1].iov_len = sizeof(virtio_net_ctrl_ack); + dev_iov[1].iov_len = sizeof(virtio_net_ctrl_ack); return true; } @@ -434,7 +435,7 @@ static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, }; bool ok; - ok = vhost_vdpa_net_cvq_map_elem(s, elem, dev_buffers); + ok = vhost_vdpa_net_cvq_map_sg(s, elem->out_sg, elem->out_num, dev_buffers); if (unlikely(!ok)) { goto out; } -- 2.31.1