X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Fvirtio%2Fvirtqueue.c;h=2702e120ee3dae2dbff3939e767a2c90205324ef;hb=34312be7a935ac9dd9ae096f392fc9a570cbb009;hp=7f60e3ef1a2cc7f619ac88312353ec235f704311;hpb=2f7fdb9d52f2134aec9c6ab96f11be79f326d8d3;p=dpdk.git

diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c
index 7f60e3ef1a..2702e120ee 100644
--- a/drivers/net/virtio/virtqueue.c
+++ b/drivers/net/virtio/virtqueue.c
@@ -1,34 +1,5 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2015 Intel Corporation
  */
 #include <stdint.h>
 
@@ -37,17 +8,7 @@
 #include "virtqueue.h"
 #include "virtio_logs.h"
 #include "virtio_pci.h"
-
-void
-virtqueue_disable_intr(struct virtqueue *vq)
-{
-	/*
-	 * Set VRING_AVAIL_F_NO_INTERRUPT to hint host
-	 * not to interrupt when it consumes packets
-	 * Note: this is only considered a hint to the host
-	 */
-	vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
-}
+#include "virtio_rxtx_simple.h"
 
 /*
  * Two types of mbuf to be cleaned:
@@ -55,18 +16,202 @@ virtqueue_disable_intr(struct virtqueue *vq)
  * 2) mbuf that hasn't been consued by backend.
  */
 struct rte_mbuf *
-virtqueue_detatch_unused(struct virtqueue *vq)
+virtqueue_detach_unused(struct virtqueue *vq)
 {
 	struct rte_mbuf *cookie;
-	int idx;
+	struct virtio_hw *hw;
+	uint16_t start, end;
+	int type, idx;
 
-	if (vq != NULL)
-		for (idx = 0; idx < vq->vq_nentries; idx++) {
+	if (vq == NULL)
+		return NULL;
+
+	hw = vq->hw;
+	type = virtio_get_queue_type(hw, vq->vq_queue_index);
+	start = vq->vq_avail_idx & (vq->vq_nentries - 1);
+	end = (vq->vq_avail_idx + vq->vq_free_cnt) & (vq->vq_nentries - 1);
+
+	for (idx = 0; idx < vq->vq_nentries; idx++) {
+		if (hw->use_vec_rx && !vtpci_packed_queue(hw) &&
+		    type == VTNET_RQ) {
+			if (start <= end && idx >= start && idx < end)
+				continue;
+			if (start > end && (idx >= start || idx < end))
+				continue;
+			cookie = vq->sw_ring[idx];
+			if (cookie != NULL) {
+				vq->sw_ring[idx] = NULL;
+				return cookie;
+			}
+		} else {
 			cookie = vq->vq_descx[idx].cookie;
 			if (cookie != NULL) {
 				vq->vq_descx[idx].cookie = NULL;
 				return cookie;
 			}
 		}
+	}
+
 	return NULL;
 }
+
+/* Flush used descs */
+static void
+virtqueue_rxvq_flush_packed(struct virtqueue *vq)
+{
+	struct vq_desc_extra *dxp;
+	uint16_t i;
+
+	struct vring_packed_desc *descs = vq->vq_packed.ring.desc;
+	int cnt = 0;
+
+	i = vq->vq_used_cons_idx;
+	while (desc_is_used(&descs[i], vq) && cnt++ < vq->vq_nentries) {
+		dxp = &vq->vq_descx[descs[i].id];
+		if (dxp->cookie != NULL) {
+			rte_pktmbuf_free(dxp->cookie);
+			dxp->cookie = NULL;
+		}
+		vq->vq_free_cnt++;
+		vq->vq_used_cons_idx++;
+		if (vq->vq_used_cons_idx >= vq->vq_nentries) {
+			vq->vq_used_cons_idx -= vq->vq_nentries;
+			vq->vq_packed.used_wrap_counter ^= 1;
+		}
+		i = vq->vq_used_cons_idx;
+	}
+}
+
+/* Flush the elements in the used ring. */
+static void
+virtqueue_rxvq_flush_split(struct virtqueue *vq)
+{
+	struct virtnet_rx *rxq = &vq->rxq;
+	struct virtio_hw *hw = vq->hw;
+	struct vring_used_elem *uep;
+	struct vq_desc_extra *dxp;
+	uint16_t used_idx, desc_idx;
+	uint16_t nb_used, i;
+
+	nb_used = virtqueue_nused(vq);
+
+	for (i = 0; i < nb_used; i++) {
+		used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
+		uep = &vq->vq_split.ring.used->ring[used_idx];
+		if (hw->use_vec_rx) {
+			desc_idx = used_idx;
+			rte_pktmbuf_free(vq->sw_ring[desc_idx]);
+			vq->vq_free_cnt++;
+		} else if (hw->use_inorder_rx) {
+			desc_idx = (uint16_t)uep->id;
+			dxp = &vq->vq_descx[desc_idx];
+			if (dxp->cookie != NULL) {
+				rte_pktmbuf_free(dxp->cookie);
+				dxp->cookie = NULL;
+			}
+			vq_ring_free_inorder(vq, desc_idx, 1);
+		} else {
+			desc_idx = (uint16_t)uep->id;
+			dxp = &vq->vq_descx[desc_idx];
+			if (dxp->cookie != NULL) {
+				rte_pktmbuf_free(dxp->cookie);
+				dxp->cookie = NULL;
+			}
+			vq_ring_free_chain(vq, desc_idx);
+		}
+		vq->vq_used_cons_idx++;
+	}
+
+	if (hw->use_vec_rx) {
+		while (vq->vq_free_cnt >= RTE_VIRTIO_VPMD_RX_REARM_THRESH) {
+			virtio_rxq_rearm_vec(rxq);
+			if (virtqueue_kick_prepare(vq))
+				virtqueue_notify(vq);
+		}
+	}
+}
+
+/* Flush the elements in the used ring. */
+void
+virtqueue_rxvq_flush(struct virtqueue *vq)
+{
+	struct virtio_hw *hw = vq->hw;
+
+	if (vtpci_packed_queue(hw))
+		virtqueue_rxvq_flush_packed(vq);
+	else
+		virtqueue_rxvq_flush_split(vq);
+}
+
+int
+virtqueue_rxvq_reset_packed(struct virtqueue *vq)
+{
+	int size = vq->vq_nentries;
+	struct vq_desc_extra *dxp;
+	struct virtnet_rx *rxvq;
+	uint16_t desc_idx;
+
+	vq->vq_used_cons_idx = 0;
+	vq->vq_desc_head_idx = 0;
+	vq->vq_avail_idx = 0;
+	vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
+	vq->vq_free_cnt = vq->vq_nentries;
+
+	vq->vq_packed.used_wrap_counter = 1;
+	vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
+	vq->vq_packed.event_flags_shadow = 0;
+	vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
+
+	rxvq = &vq->rxq;
+	memset(rxvq->mz->addr, 0, rxvq->mz->len);
+
+	for (desc_idx = 0; desc_idx < vq->vq_nentries; desc_idx++) {
+		dxp = &vq->vq_descx[desc_idx];
+		if (dxp->cookie != NULL) {
+			rte_pktmbuf_free(dxp->cookie);
+			dxp->cookie = NULL;
+		}
+	}
+
+	vring_desc_init_packed(vq, size);
+
+	virtqueue_disable_intr(vq);
+	return 0;
+}
+
+int
+virtqueue_txvq_reset_packed(struct virtqueue *vq)
+{
+	int size = vq->vq_nentries;
+	struct vq_desc_extra *dxp;
+	struct virtnet_tx *txvq;
+	uint16_t desc_idx;
+
+	vq->vq_used_cons_idx = 0;
+	vq->vq_desc_head_idx = 0;
+	vq->vq_avail_idx = 0;
+	vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
+	vq->vq_free_cnt = vq->vq_nentries;
+
+	vq->vq_packed.used_wrap_counter = 1;
+	vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
+	vq->vq_packed.event_flags_shadow = 0;
+
+	txvq = &vq->txq;
+	memset(txvq->mz->addr, 0, txvq->mz->len);
+	memset(txvq->virtio_net_hdr_mz->addr, 0,
+		txvq->virtio_net_hdr_mz->len);
+
+	for (desc_idx = 0; desc_idx < vq->vq_nentries; desc_idx++) {
+		dxp = &vq->vq_descx[desc_idx];
+		if (dxp->cookie != NULL) {
+			rte_pktmbuf_free(dxp->cookie);
+			dxp->cookie = NULL;
+		}
+	}
+
+	vring_desc_init_packed(vq, size);
+
+	virtqueue_disable_intr(vq);
+	return 0;
+}