-/*-
- * 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>
#include "virtqueue.h"
#include "virtio_logs.h"
-#include "virtio_pci.h"
+#include "virtio.h"
+#include "virtio_rxtx_simple.h"
/*
* Two types of mbuf to be cleaned:
* 1) mbuf that has been consumed by backend but not used by virtio.
- * 2) mbuf that hasn't been consued by backend.
+ * 2) mbuf that hasn't been consumed 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 && !virtio_with_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 (virtio_with_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;
+ struct virtio_tx_region *txr;
+ struct vring_packed_desc *start_dp;
+
+ 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;
+ txr = txvq->virtio_net_hdr_mz->addr;
+ 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;
+ }
+
+ if (virtio_with_feature(vq->hw, VIRTIO_RING_F_INDIRECT_DESC)) {
+ /* first indirect descriptor is always the tx header */
+ start_dp = txr[desc_idx].tx_packed_indir;
+ vring_desc_init_indirect_packed(start_dp,
+ RTE_DIM(txr[desc_idx].tx_packed_indir));
+ start_dp->addr = txvq->virtio_net_hdr_mem
+ + desc_idx * sizeof(*txr)
+ + offsetof(struct virtio_tx_region, tx_hdr);
+ start_dp->len = vq->hw->vtnet_hdr_size;
+ }
+ }
+
+ vring_desc_init_packed(vq, size);
+
+ virtqueue_disable_intr(vq);
+ return 0;
+}