From: Ouyang Changchun <changchun.ouyang@intel.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH] virtio: Fix enqueue/dequeue can't handle chained vring descriptors.
Date: Mon, 4 May 2015 14:26:20 +0800 [thread overview]
Message-ID: <1430720780-27525-1-git-send-email-changchun.ouyang@intel.com> (raw)
Vring enqueue need consider the 2 cases:
1. Vring descriptors chained together, the first one is for virtio header, the rest are for real data;
2. Only one descriptor, virtio header and real data share one single descriptor;
So does vring dequeue.
Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
---
lib/librte_vhost/vhost_rxtx.c | 60 +++++++++++++++++++++++++++++++------------
1 file changed, 44 insertions(+), 16 deletions(-)
diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index 510ffe8..3135883 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -59,7 +59,7 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0, 0, 0, 0, 0, 0}, 0};
uint64_t buff_addr = 0;
uint64_t buff_hdr_addr = 0;
- uint32_t head[MAX_PKT_BURST], packet_len = 0;
+ uint32_t head[MAX_PKT_BURST];
uint32_t head_idx, packet_success = 0;
uint16_t avail_idx, res_cur_idx;
uint16_t res_base_idx, res_end_idx;
@@ -113,6 +113,10 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
rte_prefetch0(&vq->desc[head[packet_success]]);
while (res_cur_idx != res_end_idx) {
+ uint32_t offset = 0;
+ uint32_t data_len, len_to_cpy;
+ uint8_t plus_hdr = 0;
+
/* Get descriptor from available ring */
desc = &vq->desc[head[packet_success]];
@@ -125,7 +129,6 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
/* Copy virtio_hdr to packet and increment buffer address */
buff_hdr_addr = buff_addr;
- packet_len = rte_pktmbuf_data_len(buff) + vq->vhost_hlen;
/*
* If the descriptors are chained the header and data are
@@ -136,24 +139,44 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
desc = &vq->desc[desc->next];
/* Buffer address translation. */
buff_addr = gpa_to_vva(dev, desc->addr);
- desc->len = rte_pktmbuf_data_len(buff);
} else {
buff_addr += vq->vhost_hlen;
- desc->len = packet_len;
+ plus_hdr = 1;
}
+ data_len = rte_pktmbuf_data_len(buff);
+ len_to_cpy = RTE_MIN(data_len, desc->len);
+ do {
+ if (len_to_cpy > 0) {
+ /* Copy mbuf data to buffer */
+ rte_memcpy((void *)(uintptr_t)buff_addr,
+ (const void *)(rte_pktmbuf_mtod(buff, const char *) + offset),
+ len_to_cpy);
+ PRINT_PACKET(dev, (uintptr_t)buff_addr,
+ len_to_cpy, 0);
+
+ desc->len = len_to_cpy + (plus_hdr ? vq->vhost_hlen : 0);
+ offset += len_to_cpy;
+ if (desc->flags & VRING_DESC_F_NEXT) {
+ desc = &vq->desc[desc->next];
+ buff_addr = gpa_to_vva(dev, desc->addr);
+ len_to_cpy = RTE_MIN(data_len - offset, desc->len);
+ } else
+ break;
+ } else {
+ desc->len = 0;
+ if (desc->flags & VRING_DESC_F_NEXT)
+ desc = &vq->desc[desc->next];
+ else
+ break;
+ }
+ } while (1);
+
/* Update used ring with desc information */
vq->used->ring[res_cur_idx & (vq->size - 1)].id =
head[packet_success];
- vq->used->ring[res_cur_idx & (vq->size - 1)].len = packet_len;
-
- /* Copy mbuf data to buffer */
- /* FIXME for sg mbuf and the case that desc couldn't hold the mbuf data */
- rte_memcpy((void *)(uintptr_t)buff_addr,
- rte_pktmbuf_mtod(buff, const void *),
- rte_pktmbuf_data_len(buff));
- PRINT_PACKET(dev, (uintptr_t)buff_addr,
- rte_pktmbuf_data_len(buff), 0);
+ vq->used->ring[res_cur_idx & (vq->size - 1)].len =
+ offset + vq->vhost_hlen;
res_cur_idx++;
packet_success++;
@@ -583,7 +606,14 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id,
desc = &vq->desc[head[entry_success]];
/* Discard first buffer as it is the virtio header */
- desc = &vq->desc[desc->next];
+ if (desc->flags & VRING_DESC_F_NEXT) {
+ desc = &vq->desc[desc->next];
+ vb_offset = 0;
+ vb_avail = desc->len;
+ } else {
+ vb_offset = vq->vhost_hlen;
+ vb_avail = desc->len - vb_offset;
+ }
/* Buffer address translation. */
vb_addr = gpa_to_vva(dev, desc->addr);
@@ -602,8 +632,6 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id,
vq->used->ring[used_idx].id = head[entry_success];
vq->used->ring[used_idx].len = 0;
- vb_offset = 0;
- vb_avail = desc->len;
/* Allocate an mbuf and populate the structure. */
m = rte_pktmbuf_alloc(mbuf_pool);
if (unlikely(m == NULL)) {
--
1.8.4.2
next reply other threads:[~2015-05-04 6:26 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-04 6:26 Ouyang Changchun [this message]
2015-05-12 10:00 ` Thomas Monjalon
2015-05-18 9:39 ` Xie, Huawei
2015-05-18 13:23 ` Ouyang, Changchun
2015-05-20 5:26 ` Xie, Huawei
2015-05-28 15:16 ` [dpdk-dev] [PATCH v2 0/5] Fix vhost enqueue/dequeue issue Ouyang Changchun
2015-05-28 15:16 ` [dpdk-dev] [PATCH v2 1/5] lib_vhost: Fix enqueue/dequeue can't handle chained vring descriptors Ouyang Changchun
2015-05-31 5:03 ` Xie, Huawei
2015-05-31 13:20 ` Ouyang, Changchun
2015-05-31 8:40 ` Xie, Huawei
2015-05-31 12:59 ` Ouyang, Changchun
2015-05-31 13:22 ` Ouyang, Changchun
2015-05-31 13:33 ` Ouyang, Changchun
2015-05-28 15:16 ` [dpdk-dev] [PATCH v2 2/5] lib_vhost: Refine code style Ouyang Changchun
2015-05-28 15:16 ` [dpdk-dev] [PATCH v2 3/5] lib_vhost: Extract function Ouyang Changchun
2015-05-28 15:16 ` [dpdk-dev] [PATCH v2 4/5] lib_vhost: Remove unnecessary vring descriptor length updating Ouyang Changchun
2015-05-28 15:16 ` [dpdk-dev] [PATCH v2 5/5] lib_vhost: Add support copying scattered mbuf to vring Ouyang Changchun
2015-05-31 9:10 ` Xie, Huawei
2015-05-31 13:07 ` Ouyang, Changchun
2015-06-01 8:25 ` [dpdk-dev] [PATCH v3 0/4] Fix vhost enqueue/dequeue issue Ouyang Changchun
2015-06-01 8:25 ` [dpdk-dev] [PATCH v3 1/4] lib_vhost: Fix enqueue/dequeue can't handle chained vring descriptors Ouyang Changchun
2015-06-02 7:51 ` Xie, Huawei
2015-06-02 8:10 ` Ouyang, Changchun
2015-06-01 8:25 ` [dpdk-dev] [PATCH v3 2/4] lib_vhost: Refine code style Ouyang Changchun
2015-06-01 8:25 ` [dpdk-dev] [PATCH v3 3/4] lib_vhost: Extract function Ouyang Changchun
2015-06-01 8:25 ` [dpdk-dev] [PATCH v3 4/4] lib_vhost: Remove unnecessary vring descriptor length updating Ouyang Changchun
2015-06-02 8:51 ` [dpdk-dev] [PATCH v4 0/4] Fix vhost enqueue/dequeue issue Ouyang Changchun
2015-06-02 8:51 ` [dpdk-dev] [PATCH v4 1/4] lib_vhost: Fix enqueue/dequeue can't handle chained vring descriptors Ouyang Changchun
2015-06-02 8:51 ` [dpdk-dev] [PATCH v4 2/4] lib_vhost: Refine code style Ouyang Changchun
2015-06-02 8:51 ` [dpdk-dev] [PATCH v4 3/4] lib_vhost: Extract function Ouyang Changchun
2015-06-02 8:51 ` [dpdk-dev] [PATCH v4 4/4] lib_vhost: Remove unnecessary vring descriptor length updating Ouyang Changchun
2015-06-03 6:02 ` [dpdk-dev] [PATCH v5 0/4] Fix vhost enqueue/dequeue issue Ouyang Changchun
2015-06-03 6:02 ` [dpdk-dev] [PATCH v5 1/4] lib_vhost: Fix enqueue/dequeue can't handle chained vring descriptors Ouyang Changchun
2015-06-03 6:02 ` [dpdk-dev] [PATCH v5 2/4] lib_vhost: Refine code style Ouyang Changchun
2015-06-03 6:02 ` [dpdk-dev] [PATCH v5 3/4] lib_vhost: Extract function Ouyang Changchun
2015-06-03 6:02 ` [dpdk-dev] [PATCH v5 4/4] lib_vhost: Remove unnecessary vring descriptor length updating Ouyang Changchun
2015-06-03 7:50 ` [dpdk-dev] [PATCH v5 0/4] Fix vhost enqueue/dequeue issue Xu, Qian Q
2015-06-08 3:18 ` [dpdk-dev] [PATCH v6 " Ouyang Changchun
2015-06-08 3:18 ` [dpdk-dev] [PATCH v6 1/4] lib_vhost: Fix enqueue/dequeue can't handle chained vring descriptors Ouyang Changchun
2015-06-08 3:18 ` [dpdk-dev] [PATCH v6 2/4] lib_vhost: Refine code style Ouyang Changchun
2015-06-08 3:18 ` [dpdk-dev] [PATCH v6 3/4] lib_vhost: Extract function Ouyang Changchun
2015-06-08 3:18 ` [dpdk-dev] [PATCH v6 4/4] lib_vhost: Remove unnecessary vring descriptor length updating Ouyang Changchun
2015-06-09 1:03 ` [dpdk-dev] [PATCH v7 0/4] Fix vhost enqueue/dequeue issue Ouyang Changchun
2015-06-09 1:03 ` [dpdk-dev] [PATCH v7 1/4] lib_vhost: Fix enqueue/dequeue can't handle chained vring descriptors Ouyang Changchun
2015-06-09 1:03 ` [dpdk-dev] [PATCH v7 2/4] lib_vhost: Refine code style Ouyang Changchun
2015-06-09 1:03 ` [dpdk-dev] [PATCH v7 3/4] lib_vhost: Extract function Ouyang Changchun
2015-06-09 1:03 ` [dpdk-dev] [PATCH v7 4/4] lib_vhost: Remove unnecessary vring descriptor length updating Ouyang Changchun
2015-06-10 1:40 ` [dpdk-dev] [PATCH v7 0/4] Fix vhost enqueue/dequeue issue Xie, Huawei
2015-06-10 6:49 ` Xie, Huawei
2015-06-17 14:57 ` Thomas Monjalon
2015-06-15 9:42 ` Thomas Monjalon
2015-06-16 1:01 ` Ouyang, Changchun
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