[v5,7/9] net/virtio: support in-order Rx and Tx
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Commit Message
IN_ORDER Rx function depends on merge-able feature. Descriptors
allocation and free will be done in bulk.
Virtio dequeue logic:
dequeue_burst_rx(burst mbufs)
for (each mbuf b) {
if (b need merge) {
merge remained mbufs
add merged mbuf to return mbufs list
} else {
add mbuf to return mbufs list
}
}
if (last mbuf c need merge) {
dequeue_burst_rx(required mbufs)
merge last mbuf c
}
refill_avail_ring_bulk()
update_avail_ring()
return mbufs list
IN_ORDER Tx function can support offloading features. Packets which
matched "can_push" option will be handled by simple xmit function. Those
packets can't match "can_push" will be handled by original xmit function
with in-order flag.
Virtio enqueue logic:
xmit_cleanup(used descs)
for (each xmit mbuf b) {
if (b can inorder xmit) {
add mbuf b to inorder burst list
continue
} else {
xmit inorder burst list
xmit mbuf b by original function
}
}
if (inorder burst list not empty) {
xmit inorder burst list
}
update_avail_ring()
Signed-off-by: Marvin Liu <yong.liu@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Comments
On 7/2/2018 2:56 PM, Marvin Liu wrote:
> IN_ORDER Rx function depends on merge-able feature. Descriptors
> allocation and free will be done in bulk.
>
> Virtio dequeue logic:
> dequeue_burst_rx(burst mbufs)
> for (each mbuf b) {
> if (b need merge) {
> merge remained mbufs
> add merged mbuf to return mbufs list
> } else {
> add mbuf to return mbufs list
> }
> }
> if (last mbuf c need merge) {
> dequeue_burst_rx(required mbufs)
> merge last mbuf c
> }
> refill_avail_ring_bulk()
> update_avail_ring()
> return mbufs list
>
> IN_ORDER Tx function can support offloading features. Packets which
> matched "can_push" option will be handled by simple xmit function. Those
> packets can't match "can_push" will be handled by original xmit function
> with in-order flag.
>
> Virtio enqueue logic:
> xmit_cleanup(used descs)
> for (each xmit mbuf b) {
> if (b can inorder xmit) {
> add mbuf b to inorder burst list
> continue
> } else {
> xmit inorder burst list
> xmit mbuf b by original function
> }
> }
> if (inorder burst list not empty) {
> xmit inorder burst list
> }
> update_avail_ring()
>
> Signed-off-by: Marvin Liu <yong.liu@intel.com>
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
<...>
> @@ -150,6 +188,83 @@ virtio_xmit_cleanup(struct virtqueue *vq, uint16_t num)
> }
> }
>
> +/* Cleanup from completed inorder transmits. */
> +static void
> +virtio_xmit_cleanup_inorder(struct virtqueue *vq, uint16_t num)
> +{
> + uint16_t i, used_idx, desc_idx, last_idx;
Getting following build error [1], from code it looks like false positive, but
to get rid of the build error would it be OK to set initial value to "desc_idx"?
[1]
.../dpdk/drivers/net/virtio/virtio_rxtx.c:195:24: error: ‘desc_idx’ may be used
uninitialized in this function [-Werror=maybe-uninitialized]
uint16_t i, used_idx, desc_idx, last_idx;
^~~~~~~~
On 7/2/2018 5:41 PM, Ferruh Yigit wrote:
> On 7/2/2018 2:56 PM, Marvin Liu wrote:
>> IN_ORDER Rx function depends on merge-able feature. Descriptors
>> allocation and free will be done in bulk.
>>
>> Virtio dequeue logic:
>> dequeue_burst_rx(burst mbufs)
>> for (each mbuf b) {
>> if (b need merge) {
>> merge remained mbufs
>> add merged mbuf to return mbufs list
>> } else {
>> add mbuf to return mbufs list
>> }
>> }
>> if (last mbuf c need merge) {
>> dequeue_burst_rx(required mbufs)
>> merge last mbuf c
>> }
>> refill_avail_ring_bulk()
>> update_avail_ring()
>> return mbufs list
>>
>> IN_ORDER Tx function can support offloading features. Packets which
>> matched "can_push" option will be handled by simple xmit function. Those
>> packets can't match "can_push" will be handled by original xmit function
>> with in-order flag.
>>
>> Virtio enqueue logic:
>> xmit_cleanup(used descs)
>> for (each xmit mbuf b) {
>> if (b can inorder xmit) {
>> add mbuf b to inorder burst list
>> continue
>> } else {
>> xmit inorder burst list
>> xmit mbuf b by original function
>> }
>> }
>> if (inorder burst list not empty) {
>> xmit inorder burst list
>> }
>> update_avail_ring()
>>
>> Signed-off-by: Marvin Liu <yong.liu@intel.com>
>> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>
> <...>
>
>> @@ -150,6 +188,83 @@ virtio_xmit_cleanup(struct virtqueue *vq, uint16_t num)
>> }
>> }
>>
>> +/* Cleanup from completed inorder transmits. */
>> +static void
>> +virtio_xmit_cleanup_inorder(struct virtqueue *vq, uint16_t num)
>> +{
>> + uint16_t i, used_idx, desc_idx, last_idx;
>
>
> Getting following build error [1], from code it looks like false positive, but
> to get rid of the build error would it be OK to set initial value to "desc_idx"?
I applied this while merging, if this is wrong please let me know, we can fix in
next-net, Thanks.
>
>
> [1]
> .../dpdk/drivers/net/virtio/virtio_rxtx.c:195:24: error: ‘desc_idx’ may be used
> uninitialized in this function [-Werror=maybe-uninitialized]
>
>
> uint16_t i, used_idx, desc_idx, last_idx;
>
>
>
> ^~~~~~~~
>
On 07/02/2018 06:52 PM, Ferruh Yigit wrote:
> On 7/2/2018 5:41 PM, Ferruh Yigit wrote:
>> On 7/2/2018 2:56 PM, Marvin Liu wrote:
>>> IN_ORDER Rx function depends on merge-able feature. Descriptors
>>> allocation and free will be done in bulk.
>>>
>>> Virtio dequeue logic:
>>> dequeue_burst_rx(burst mbufs)
>>> for (each mbuf b) {
>>> if (b need merge) {
>>> merge remained mbufs
>>> add merged mbuf to return mbufs list
>>> } else {
>>> add mbuf to return mbufs list
>>> }
>>> }
>>> if (last mbuf c need merge) {
>>> dequeue_burst_rx(required mbufs)
>>> merge last mbuf c
>>> }
>>> refill_avail_ring_bulk()
>>> update_avail_ring()
>>> return mbufs list
>>>
>>> IN_ORDER Tx function can support offloading features. Packets which
>>> matched "can_push" option will be handled by simple xmit function. Those
>>> packets can't match "can_push" will be handled by original xmit function
>>> with in-order flag.
>>>
>>> Virtio enqueue logic:
>>> xmit_cleanup(used descs)
>>> for (each xmit mbuf b) {
>>> if (b can inorder xmit) {
>>> add mbuf b to inorder burst list
>>> continue
>>> } else {
>>> xmit inorder burst list
>>> xmit mbuf b by original function
>>> }
>>> }
>>> if (inorder burst list not empty) {
>>> xmit inorder burst list
>>> }
>>> update_avail_ring()
>>>
>>> Signed-off-by: Marvin Liu <yong.liu@intel.com>
>>> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>>
>> <...>
>>
>>> @@ -150,6 +188,83 @@ virtio_xmit_cleanup(struct virtqueue *vq, uint16_t num)
>>> }
>>> }
>>>
>>> +/* Cleanup from completed inorder transmits. */
>>> +static void
>>> +virtio_xmit_cleanup_inorder(struct virtqueue *vq, uint16_t num)
>>> +{
>>> + uint16_t i, used_idx, desc_idx, last_idx;
>>
>>
>> Getting following build error [1], from code it looks like false positive, but
>> to get rid of the build error would it be OK to set initial value to "desc_idx"?
>
> I applied this while merging, if this is wrong please let me know, we can fix in
> next-net, Thanks.
Looks good to me. I didn't catch it with the GCC version I use.
Thanks,
Maxime
>>
>>
>> [1]
>> .../dpdk/drivers/net/virtio/virtio_rxtx.c:195:24: error: ‘desc_idx’ may be used
>> uninitialized in this function [-Werror=maybe-uninitialized]
>>
>>
>> uint16_t i, used_idx, desc_idx, last_idx;
>>
>>
>>
>> ^~~~~~~~
>>
>
On 7/2/2018 5:53 PM, Maxime Coquelin wrote:
>
>
> On 07/02/2018 06:52 PM, Ferruh Yigit wrote:
>> On 7/2/2018 5:41 PM, Ferruh Yigit wrote:
>>> On 7/2/2018 2:56 PM, Marvin Liu wrote:
>>>> IN_ORDER Rx function depends on merge-able feature. Descriptors
>>>> allocation and free will be done in bulk.
>>>>
>>>> Virtio dequeue logic:
>>>> dequeue_burst_rx(burst mbufs)
>>>> for (each mbuf b) {
>>>> if (b need merge) {
>>>> merge remained mbufs
>>>> add merged mbuf to return mbufs list
>>>> } else {
>>>> add mbuf to return mbufs list
>>>> }
>>>> }
>>>> if (last mbuf c need merge) {
>>>> dequeue_burst_rx(required mbufs)
>>>> merge last mbuf c
>>>> }
>>>> refill_avail_ring_bulk()
>>>> update_avail_ring()
>>>> return mbufs list
>>>>
>>>> IN_ORDER Tx function can support offloading features. Packets which
>>>> matched "can_push" option will be handled by simple xmit function. Those
>>>> packets can't match "can_push" will be handled by original xmit function
>>>> with in-order flag.
>>>>
>>>> Virtio enqueue logic:
>>>> xmit_cleanup(used descs)
>>>> for (each xmit mbuf b) {
>>>> if (b can inorder xmit) {
>>>> add mbuf b to inorder burst list
>>>> continue
>>>> } else {
>>>> xmit inorder burst list
>>>> xmit mbuf b by original function
>>>> }
>>>> }
>>>> if (inorder burst list not empty) {
>>>> xmit inorder burst list
>>>> }
>>>> update_avail_ring()
>>>>
>>>> Signed-off-by: Marvin Liu <yong.liu@intel.com>
>>>> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>>>
>>> <...>
>>>
>>>> @@ -150,6 +188,83 @@ virtio_xmit_cleanup(struct virtqueue *vq, uint16_t num)
>>>> }
>>>> }
>>>>
>>>> +/* Cleanup from completed inorder transmits. */
>>>> +static void
>>>> +virtio_xmit_cleanup_inorder(struct virtqueue *vq, uint16_t num)
>>>> +{
>>>> + uint16_t i, used_idx, desc_idx, last_idx;
>>>
>>>
>>> Getting following build error [1], from code it looks like false positive, but
>>> to get rid of the build error would it be OK to set initial value to "desc_idx"?
>>
>> I applied this while merging, if this is wrong please let me know, we can fix in
>> next-net, Thanks.
>
> Looks good to me. I didn't catch it with the GCC version I use.
I didn't dig more but I also didn't get the error with regular build, the one
with all DEBUGs enabled and mach=default combination gave the error, not sure why.
>
> Thanks,
> Maxime
>
>>>
>>>
>>> [1]
>>> .../dpdk/drivers/net/virtio/virtio_rxtx.c:195:24: error: ‘desc_idx’ may be used
>>> uninitialized in this function [-Werror=maybe-uninitialized]
>>>
>>>
>>> uint16_t i, used_idx, desc_idx, last_idx;
>>>
>>>
>>>
>>> ^~~~~~~~
>>>
>>
> -----Original Message-----
> From: Yigit, Ferruh
> Sent: Tuesday, July 03, 2018 12:57 AM
> To: Maxime Coquelin <maxime.coquelin@redhat.com>; Liu, Yong
> <yong.liu@intel.com>; Bie, Tiwei <tiwei.bie@intel.com>
> Cc: Wang, Zhihong <zhihong.wang@intel.com>; dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v5 7/9] net/virtio: support in-order Rx and
> Tx
>
> On 7/2/2018 5:53 PM, Maxime Coquelin wrote:
> >
> >
> > On 07/02/2018 06:52 PM, Ferruh Yigit wrote:
> >> On 7/2/2018 5:41 PM, Ferruh Yigit wrote:
> >>> On 7/2/2018 2:56 PM, Marvin Liu wrote:
> >>>> IN_ORDER Rx function depends on merge-able feature. Descriptors
> >>>> allocation and free will be done in bulk.
> >>>>
> >>>> Virtio dequeue logic:
> >>>> dequeue_burst_rx(burst mbufs)
> >>>> for (each mbuf b) {
> >>>> if (b need merge) {
> >>>> merge remained mbufs
> >>>> add merged mbuf to return mbufs list
> >>>> } else {
> >>>> add mbuf to return mbufs list
> >>>> }
> >>>> }
> >>>> if (last mbuf c need merge) {
> >>>> dequeue_burst_rx(required mbufs)
> >>>> merge last mbuf c
> >>>> }
> >>>> refill_avail_ring_bulk()
> >>>> update_avail_ring()
> >>>> return mbufs list
> >>>>
> >>>> IN_ORDER Tx function can support offloading features. Packets which
> >>>> matched "can_push" option will be handled by simple xmit function.
> Those
> >>>> packets can't match "can_push" will be handled by original xmit
> function
> >>>> with in-order flag.
> >>>>
> >>>> Virtio enqueue logic:
> >>>> xmit_cleanup(used descs)
> >>>> for (each xmit mbuf b) {
> >>>> if (b can inorder xmit) {
> >>>> add mbuf b to inorder burst list
> >>>> continue
> >>>> } else {
> >>>> xmit inorder burst list
> >>>> xmit mbuf b by original function
> >>>> }
> >>>> }
> >>>> if (inorder burst list not empty) {
> >>>> xmit inorder burst list
> >>>> }
> >>>> update_avail_ring()
> >>>>
> >>>> Signed-off-by: Marvin Liu <yong.liu@intel.com>
> >>>> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> >>>
> >>> <...>
> >>>
> >>>> @@ -150,6 +188,83 @@ virtio_xmit_cleanup(struct virtqueue *vq,
> uint16_t num)
> >>>> }
> >>>> }
> >>>>
> >>>> +/* Cleanup from completed inorder transmits. */
> >>>> +static void
> >>>> +virtio_xmit_cleanup_inorder(struct virtqueue *vq, uint16_t num)
> >>>> +{
> >>>> + uint16_t i, used_idx, desc_idx, last_idx;
> >>>
> >>>
> >>> Getting following build error [1], from code it looks like false
> positive, but
> >>> to get rid of the build error would it be OK to set initial value to
> "desc_idx"?
> >>
> >> I applied this while merging, if this is wrong please let me know, we
> can fix in
> >> next-net, Thanks.
> >
> > Looks good to me. I didn't catch it with the GCC version I use.
>
> I didn't dig more but I also didn't get the error with regular build, the
> one
> with all DEBUGs enabled and mach=default combination gave the error, not
> sure why.
>
Ferruh,
I didn't catch this error either. I tried three gcc versions 7.2.0, 7.3.0 and 4.8.3.
May I know your gcc version?
Thanks,
Marvin
> >
> > Thanks,
> > Maxime
> >
> >>>
> >>>
> >>> [1]
> >>> .../dpdk/drivers/net/virtio/virtio_rxtx.c:195:24: error: ‘desc_idx’
> may be used
> >>> uninitialized in this function [-Werror=maybe-uninitialized]
> >>>
> >>>
> >>> uint16_t i, used_idx, desc_idx, last_idx;
> >>>
> >>>
> >>>
> >>> ^~~~~~~~
> >>>
> >>
On 7/3/2018 2:36 AM, Liu, Yong wrote:
>
>
>> -----Original Message-----
>> From: Yigit, Ferruh
>> Sent: Tuesday, July 03, 2018 12:57 AM
>> To: Maxime Coquelin <maxime.coquelin@redhat.com>; Liu, Yong
>> <yong.liu@intel.com>; Bie, Tiwei <tiwei.bie@intel.com>
>> Cc: Wang, Zhihong <zhihong.wang@intel.com>; dev@dpdk.org
>> Subject: Re: [dpdk-dev] [PATCH v5 7/9] net/virtio: support in-order Rx and
>> Tx
>>
>> On 7/2/2018 5:53 PM, Maxime Coquelin wrote:
>>>
>>>
>>> On 07/02/2018 06:52 PM, Ferruh Yigit wrote:
>>>> On 7/2/2018 5:41 PM, Ferruh Yigit wrote:
>>>>> On 7/2/2018 2:56 PM, Marvin Liu wrote:
>>>>>> IN_ORDER Rx function depends on merge-able feature. Descriptors
>>>>>> allocation and free will be done in bulk.
>>>>>>
>>>>>> Virtio dequeue logic:
>>>>>> dequeue_burst_rx(burst mbufs)
>>>>>> for (each mbuf b) {
>>>>>> if (b need merge) {
>>>>>> merge remained mbufs
>>>>>> add merged mbuf to return mbufs list
>>>>>> } else {
>>>>>> add mbuf to return mbufs list
>>>>>> }
>>>>>> }
>>>>>> if (last mbuf c need merge) {
>>>>>> dequeue_burst_rx(required mbufs)
>>>>>> merge last mbuf c
>>>>>> }
>>>>>> refill_avail_ring_bulk()
>>>>>> update_avail_ring()
>>>>>> return mbufs list
>>>>>>
>>>>>> IN_ORDER Tx function can support offloading features. Packets which
>>>>>> matched "can_push" option will be handled by simple xmit function.
>> Those
>>>>>> packets can't match "can_push" will be handled by original xmit
>> function
>>>>>> with in-order flag.
>>>>>>
>>>>>> Virtio enqueue logic:
>>>>>> xmit_cleanup(used descs)
>>>>>> for (each xmit mbuf b) {
>>>>>> if (b can inorder xmit) {
>>>>>> add mbuf b to inorder burst list
>>>>>> continue
>>>>>> } else {
>>>>>> xmit inorder burst list
>>>>>> xmit mbuf b by original function
>>>>>> }
>>>>>> }
>>>>>> if (inorder burst list not empty) {
>>>>>> xmit inorder burst list
>>>>>> }
>>>>>> update_avail_ring()
>>>>>>
>>>>>> Signed-off-by: Marvin Liu <yong.liu@intel.com>
>>>>>> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>>>>>
>>>>> <...>
>>>>>
>>>>>> @@ -150,6 +188,83 @@ virtio_xmit_cleanup(struct virtqueue *vq,
>> uint16_t num)
>>>>>> }
>>>>>> }
>>>>>>
>>>>>> +/* Cleanup from completed inorder transmits. */
>>>>>> +static void
>>>>>> +virtio_xmit_cleanup_inorder(struct virtqueue *vq, uint16_t num)
>>>>>> +{
>>>>>> + uint16_t i, used_idx, desc_idx, last_idx;
>>>>>
>>>>>
>>>>> Getting following build error [1], from code it looks like false
>> positive, but
>>>>> to get rid of the build error would it be OK to set initial value to
>> "desc_idx"?
>>>>
>>>> I applied this while merging, if this is wrong please let me know, we
>> can fix in
>>>> next-net, Thanks.
>>>
>>> Looks good to me. I didn't catch it with the GCC version I use.
>>
>> I didn't dig more but I also didn't get the error with regular build, the
>> one
>> with all DEBUGs enabled and mach=default combination gave the error, not
>> sure why.
>>
>
> Ferruh,
> I didn't catch this error either. I tried three gcc versions 7.2.0, 7.3.0 and 4.8.3.
> May I know your gcc version?
gcc [1] with debug enabled [2], giving error [3].
[1]
gcc (GCC) 8.1.1 20180502 (Red Hat 8.1.1-1)
make T=x86_64-native-linuxapp-gcc config
[2]
CONFIG_RTE_LIBRTE_VIRTIO_DEBUG_RX=y
CONFIG_RTE_LIBRTE_VIRTIO_DEBUG_TX=y
CONFIG_RTE_LIBRTE_VIRTIO_DEBUG_DUMP=y
[3]
.../drivers/net/virtio/virtio_rxtx.c: In function ‘virtio_xmit_cleanup_inorder’:
.../drivers/net/virtio/virtio_rxtx.c:195:24: error: ‘desc_idx’ may be used
uninitialized in this function [-Werror=maybe-uninitialized]
uint16_t i, used_idx, desc_idx, last_idx;
^~~~~~~~
cc1: all warnings being treated as errors
>
> Thanks,
> Marvin
>
>>>
>>> Thanks,
>>> Maxime
>>>
>>>>>
>>>>>
>>>>> [1]
>>>>> .../dpdk/drivers/net/virtio/virtio_rxtx.c:195:24: error: ‘desc_idx’
>> may be used
>>>>> uninitialized in this function [-Werror=maybe-uninitialized]
>>>>>
>>>>>
>>>>> uint16_t i, used_idx, desc_idx, last_idx;
>>>>>
>>>>>
>>>>>
>>>>> ^~~~~~~~
>>>>>
>>>>
>
@@ -83,9 +83,15 @@ uint16_t virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
uint16_t virtio_recv_mergeable_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
uint16_t nb_pkts);
+uint16_t virtio_recv_mergeable_pkts_inorder(void *rx_queue,
+ struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
+
uint16_t virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts);
+uint16_t virtio_xmit_pkts_inorder(void *tx_queue, struct rte_mbuf **tx_pkts,
+ uint16_t nb_pkts);
+
uint16_t virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
uint16_t nb_pkts);
@@ -122,6 +122,44 @@ virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct rte_mbuf **rx_pkts,
return i;
}
+static uint16_t
+virtqueue_dequeue_rx_inorder(struct virtqueue *vq,
+ struct rte_mbuf **rx_pkts,
+ uint32_t *len,
+ uint16_t num)
+{
+ struct vring_used_elem *uep;
+ struct rte_mbuf *cookie;
+ uint16_t used_idx = 0;
+ uint16_t i;
+
+ if (unlikely(num == 0))
+ return 0;
+
+ for (i = 0; i < num; i++) {
+ used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
+ /* Desc idx same as used idx */
+ uep = &vq->vq_ring.used->ring[used_idx];
+ len[i] = uep->len;
+ cookie = (struct rte_mbuf *)vq->vq_descx[used_idx].cookie;
+
+ if (unlikely(cookie == NULL)) {
+ PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u",
+ vq->vq_used_cons_idx);
+ break;
+ }
+
+ rte_prefetch0(cookie);
+ rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
+ rx_pkts[i] = cookie;
+ vq->vq_used_cons_idx++;
+ vq->vq_descx[used_idx].cookie = NULL;
+ }
+
+ vq_ring_free_inorder(vq, used_idx, i);
+ return i;
+}
+
#ifndef DEFAULT_TX_FREE_THRESH
#define DEFAULT_TX_FREE_THRESH 32
#endif
@@ -150,6 +188,83 @@ virtio_xmit_cleanup(struct virtqueue *vq, uint16_t num)
}
}
+/* Cleanup from completed inorder transmits. */
+static void
+virtio_xmit_cleanup_inorder(struct virtqueue *vq, uint16_t num)
+{
+ uint16_t i, used_idx, desc_idx, last_idx;
+ int16_t free_cnt = 0;
+ struct vq_desc_extra *dxp = NULL;
+
+ if (unlikely(num == 0))
+ return;
+
+ for (i = 0; i < num; i++) {
+ struct vring_used_elem *uep;
+
+ used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
+ uep = &vq->vq_ring.used->ring[used_idx];
+ desc_idx = (uint16_t)uep->id;
+
+ dxp = &vq->vq_descx[desc_idx];
+ vq->vq_used_cons_idx++;
+
+ if (dxp->cookie != NULL) {
+ rte_pktmbuf_free(dxp->cookie);
+ dxp->cookie = NULL;
+ }
+ }
+
+ last_idx = desc_idx + dxp->ndescs - 1;
+ free_cnt = last_idx - vq->vq_desc_tail_idx;
+ if (free_cnt <= 0)
+ free_cnt += vq->vq_nentries;
+
+ vq_ring_free_inorder(vq, last_idx, free_cnt);
+}
+
+static inline int
+virtqueue_enqueue_refill_inorder(struct virtqueue *vq,
+ struct rte_mbuf **cookies,
+ uint16_t num)
+{
+ struct vq_desc_extra *dxp;
+ struct virtio_hw *hw = vq->hw;
+ struct vring_desc *start_dp;
+ uint16_t head_idx, idx, i = 0;
+
+ if (unlikely(vq->vq_free_cnt == 0))
+ return -ENOSPC;
+ if (unlikely(vq->vq_free_cnt < num))
+ return -EMSGSIZE;
+
+ head_idx = vq->vq_desc_head_idx & (vq->vq_nentries - 1);
+ start_dp = vq->vq_ring.desc;
+
+ while (i < num) {
+ idx = head_idx & (vq->vq_nentries - 1);
+ dxp = &vq->vq_descx[idx];
+ dxp->cookie = (void *)cookies[i];
+ dxp->ndescs = 1;
+
+ start_dp[idx].addr =
+ VIRTIO_MBUF_ADDR(cookies[i], vq) +
+ RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size;
+ start_dp[idx].len =
+ cookies[i]->buf_len -
+ RTE_PKTMBUF_HEADROOM +
+ hw->vtnet_hdr_size;
+ start_dp[idx].flags = VRING_DESC_F_WRITE;
+
+ vq_update_avail_ring(vq, idx);
+ head_idx++;
+ i++;
+ }
+
+ vq->vq_desc_head_idx += num;
+ vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
+ return 0;
+}
static inline int
virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct rte_mbuf *cookie)
@@ -295,9 +410,65 @@ virtqueue_xmit_offload(struct virtio_net_hdr *hdr,
}
}
+static inline void
+virtqueue_enqueue_xmit_inorder(struct virtnet_tx *txvq,
+ struct rte_mbuf **cookies,
+ uint16_t num)
+{
+ struct vq_desc_extra *dxp;
+ struct virtqueue *vq = txvq->vq;
+ struct vring_desc *start_dp;
+ struct virtio_net_hdr *hdr;
+ uint16_t idx;
+ uint16_t head_size = vq->hw->vtnet_hdr_size;
+ int offload;
+ uint16_t i = 0;
+
+ idx = vq->vq_desc_head_idx;
+ start_dp = vq->vq_ring.desc;
+
+ offload = tx_offload_enabled(vq->hw);
+
+ while (i < num) {
+ idx = idx & (vq->vq_nentries - 1);
+ dxp = &vq->vq_descx[idx];
+ dxp->cookie = (void *)cookies[i];
+ dxp->ndescs = 1;
+
+ hdr = (struct virtio_net_hdr *)
+ rte_pktmbuf_prepend(cookies[i], head_size);
+ cookies[i]->pkt_len -= head_size;
+
+ /* if offload disabled, it is not zeroed below, do it now */
+ if (offload == 0) {
+ ASSIGN_UNLESS_EQUAL(hdr->csum_start, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->csum_offset, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->flags, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->gso_type, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->gso_size, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->hdr_len, 0);
+ }
+
+ virtqueue_xmit_offload(hdr, cookies[i], offload);
+
+ start_dp[idx].addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookies[i], vq);
+ start_dp[idx].len = cookies[i]->data_len;
+ start_dp[idx].flags = 0;
+
+ vq_update_avail_ring(vq, idx);
+
+ idx++;
+ i++;
+ };
+
+ vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
+ vq->vq_desc_head_idx = idx & (vq->vq_nentries - 1);
+}
+
static inline void
virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
- uint16_t needed, int use_indirect, int can_push)
+ uint16_t needed, int use_indirect, int can_push,
+ int in_order)
{
struct virtio_tx_region *txr = txvq->virtio_net_hdr_mz->addr;
struct vq_desc_extra *dxp;
@@ -310,6 +481,7 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
int offload;
offload = tx_offload_enabled(vq->hw);
+
head_idx = vq->vq_desc_head_idx;
idx = head_idx;
dxp = &vq->vq_descx[idx];
@@ -326,6 +498,7 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
* which is wrong. Below subtract restores correct pkt size.
*/
cookie->pkt_len -= head_size;
+
/* if offload disabled, it is not zeroed below, do it now */
if (offload == 0) {
ASSIGN_UNLESS_EQUAL(hdr->csum_start, 0);
@@ -376,11 +549,15 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
if (use_indirect)
idx = vq->vq_ring.desc[head_idx].next;
- vq->vq_desc_head_idx = idx;
- if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
- vq->vq_desc_tail_idx = idx;
vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
+
+ vq->vq_desc_head_idx = idx;
vq_update_avail_ring(vq, head_idx);
+
+ if (!in_order) {
+ if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
+ vq->vq_desc_tail_idx = idx;
+ }
}
void
@@ -435,7 +612,7 @@ virtio_dev_rx_queue_setup_finish(struct rte_eth_dev *dev, uint16_t queue_idx)
struct virtnet_rx *rxvq = &vq->rxq;
struct rte_mbuf *m;
uint16_t desc_idx;
- int error, nbufs;
+ int error, nbufs, i;
PMD_INIT_FUNC_TRACE();
@@ -465,6 +642,25 @@ virtio_dev_rx_queue_setup_finish(struct rte_eth_dev *dev, uint16_t queue_idx)
virtio_rxq_rearm_vec(rxvq);
nbufs += RTE_VIRTIO_VPMD_RX_REARM_THRESH;
}
+ } else if (hw->use_inorder_rx) {
+ if ((!virtqueue_full(vq))) {
+ uint16_t free_cnt = vq->vq_free_cnt;
+ struct rte_mbuf *pkts[free_cnt];
+
+ if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, pkts,
+ free_cnt)) {
+ error = virtqueue_enqueue_refill_inorder(vq,
+ pkts,
+ free_cnt);
+ if (unlikely(error)) {
+ for (i = 0; i < free_cnt; i++)
+ rte_pktmbuf_free(pkts[i]);
+ }
+ }
+
+ nbufs += free_cnt;
+ vq_update_avail_idx(vq);
+ }
} else {
while (!virtqueue_full(vq)) {
m = rte_mbuf_raw_alloc(rxvq->mpool);
@@ -574,6 +770,8 @@ virtio_dev_tx_queue_setup_finish(struct rte_eth_dev *dev,
for (desc_idx = mid_idx; desc_idx < vq->vq_nentries;
desc_idx++)
vq->vq_ring.avail->ring[desc_idx] = desc_idx;
+ } else if (hw->use_inorder_tx) {
+ vq->vq_ring.desc[vq->vq_nentries - 1].next = 0;
}
VIRTQUEUE_DUMP(vq);
@@ -590,6 +788,19 @@ virtio_discard_rxbuf(struct virtqueue *vq, struct rte_mbuf *m)
* successful since it was just dequeued.
*/
error = virtqueue_enqueue_recv_refill(vq, m);
+
+ if (unlikely(error)) {
+ RTE_LOG(ERR, PMD, "cannot requeue discarded mbuf");
+ rte_pktmbuf_free(m);
+ }
+}
+
+static void
+virtio_discard_rxbuf_inorder(struct virtqueue *vq, struct rte_mbuf *m)
+{
+ int error;
+
+ error = virtqueue_enqueue_refill_inorder(vq, &m, 1);
if (unlikely(error)) {
RTE_LOG(ERR, PMD, "cannot requeue discarded mbuf");
rte_pktmbuf_free(m);
@@ -826,6 +1037,194 @@ virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
return nb_rx;
}
+uint16_t
+virtio_recv_mergeable_pkts_inorder(void *rx_queue,
+ struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ struct virtnet_rx *rxvq = rx_queue;
+ struct virtqueue *vq = rxvq->vq;
+ struct virtio_hw *hw = vq->hw;
+ struct rte_mbuf *rxm;
+ struct rte_mbuf *prev;
+ uint16_t nb_used, num, nb_rx;
+ uint32_t len[VIRTIO_MBUF_BURST_SZ];
+ struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
+ int error;
+ uint32_t nb_enqueued;
+ uint32_t seg_num;
+ uint32_t seg_res;
+ uint32_t hdr_size;
+ int32_t i;
+ int offload;
+
+ nb_rx = 0;
+ if (unlikely(hw->started == 0))
+ return nb_rx;
+
+ nb_used = VIRTQUEUE_NUSED(vq);
+ nb_used = RTE_MIN(nb_used, nb_pkts);
+ nb_used = RTE_MIN(nb_used, VIRTIO_MBUF_BURST_SZ);
+
+ virtio_rmb();
+
+ PMD_RX_LOG(DEBUG, "used:%d", nb_used);
+
+ nb_enqueued = 0;
+ seg_num = 1;
+ seg_res = 0;
+ hdr_size = hw->vtnet_hdr_size;
+ offload = rx_offload_enabled(hw);
+
+ num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len, nb_used);
+
+ for (i = 0; i < num; i++) {
+ struct virtio_net_hdr_mrg_rxbuf *header;
+
+ PMD_RX_LOG(DEBUG, "dequeue:%d", num);
+ PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
+
+ rxm = rcv_pkts[i];
+
+ if (unlikely(len[i] < hdr_size + ETHER_HDR_LEN)) {
+ PMD_RX_LOG(ERR, "Packet drop");
+ nb_enqueued++;
+ virtio_discard_rxbuf_inorder(vq, rxm);
+ rxvq->stats.errors++;
+ continue;
+ }
+
+ header = (struct virtio_net_hdr_mrg_rxbuf *)
+ ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM
+ - hdr_size);
+ seg_num = header->num_buffers;
+
+ if (seg_num == 0)
+ seg_num = 1;
+
+ rxm->data_off = RTE_PKTMBUF_HEADROOM;
+ rxm->nb_segs = seg_num;
+ rxm->ol_flags = 0;
+ rxm->vlan_tci = 0;
+ rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
+ rxm->data_len = (uint16_t)(len[i] - hdr_size);
+
+ rxm->port = rxvq->port_id;
+
+ rx_pkts[nb_rx] = rxm;
+ prev = rxm;
+
+ if (offload && virtio_rx_offload(rxm, &header->hdr) < 0) {
+ virtio_discard_rxbuf_inorder(vq, rxm);
+ rxvq->stats.errors++;
+ continue;
+ }
+
+ if (hw->vlan_strip)
+ rte_vlan_strip(rx_pkts[nb_rx]);
+
+ seg_res = seg_num - 1;
+
+ /* Merge remaining segments */
+ while (seg_res != 0 && i < (num - 1)) {
+ i++;
+
+ rxm = rcv_pkts[i];
+ rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
+ rxm->pkt_len = (uint32_t)(len[i]);
+ rxm->data_len = (uint16_t)(len[i]);
+
+ rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
+ rx_pkts[nb_rx]->data_len += (uint16_t)(len[i]);
+
+ if (prev)
+ prev->next = rxm;
+
+ prev = rxm;
+ seg_res -= 1;
+ }
+
+ if (!seg_res) {
+ virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
+ nb_rx++;
+ }
+ }
+
+ /* Last packet still need merge segments */
+ while (seg_res != 0) {
+ uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
+ VIRTIO_MBUF_BURST_SZ);
+
+ prev = rcv_pkts[nb_rx];
+ if (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) {
+ num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len,
+ rcv_cnt);
+ uint16_t extra_idx = 0;
+
+ rcv_cnt = num;
+ while (extra_idx < rcv_cnt) {
+ rxm = rcv_pkts[extra_idx];
+ rxm->data_off =
+ RTE_PKTMBUF_HEADROOM - hdr_size;
+ rxm->pkt_len = (uint32_t)(len[extra_idx]);
+ rxm->data_len = (uint16_t)(len[extra_idx]);
+ prev->next = rxm;
+ prev = rxm;
+ rx_pkts[nb_rx]->pkt_len += len[extra_idx];
+ rx_pkts[nb_rx]->data_len += len[extra_idx];
+ extra_idx += 1;
+ };
+ seg_res -= rcv_cnt;
+
+ if (!seg_res) {
+ virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
+ nb_rx++;
+ }
+ } else {
+ PMD_RX_LOG(ERR,
+ "No enough segments for packet.");
+ virtio_discard_rxbuf_inorder(vq, prev);
+ rxvq->stats.errors++;
+ break;
+ }
+ }
+
+ rxvq->stats.packets += nb_rx;
+
+ /* Allocate new mbuf for the used descriptor */
+
+ if (likely(!virtqueue_full(vq))) {
+ /* free_cnt may include mrg descs */
+ uint16_t free_cnt = vq->vq_free_cnt;
+ struct rte_mbuf *new_pkts[free_cnt];
+
+ if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
+ error = virtqueue_enqueue_refill_inorder(vq, new_pkts,
+ free_cnt);
+ if (unlikely(error)) {
+ for (i = 0; i < free_cnt; i++)
+ rte_pktmbuf_free(new_pkts[i]);
+ }
+ nb_enqueued += free_cnt;
+ } else {
+ struct rte_eth_dev *dev =
+ &rte_eth_devices[rxvq->port_id];
+ dev->data->rx_mbuf_alloc_failed += free_cnt;
+ }
+ }
+
+ if (likely(nb_enqueued)) {
+ vq_update_avail_idx(vq);
+
+ if (unlikely(virtqueue_kick_prepare(vq))) {
+ virtqueue_notify(vq);
+ PMD_RX_LOG(DEBUG, "Notified");
+ }
+ }
+
+ return nb_rx;
+}
+
uint16_t
virtio_recv_mergeable_pkts(void *rx_queue,
struct rte_mbuf **rx_pkts,
@@ -1073,7 +1472,8 @@ virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
}
/* Enqueue Packet buffers */
- virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect, can_push);
+ virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect,
+ can_push, 0);
txvq->stats.bytes += txm->pkt_len;
virtio_update_packet_stats(&txvq->stats, txm);
@@ -1092,3 +1492,116 @@ virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
return nb_tx;
}
+
+uint16_t
+virtio_xmit_pkts_inorder(void *tx_queue,
+ struct rte_mbuf **tx_pkts,
+ uint16_t nb_pkts)
+{
+ struct virtnet_tx *txvq = tx_queue;
+ struct virtqueue *vq = txvq->vq;
+ struct virtio_hw *hw = vq->hw;
+ uint16_t hdr_size = hw->vtnet_hdr_size;
+ uint16_t nb_used, nb_avail, nb_tx = 0, nb_inorder_pkts = 0;
+ struct rte_mbuf *inorder_pkts[nb_pkts];
+ int error;
+
+ if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
+ return nb_tx;
+
+ if (unlikely(nb_pkts < 1))
+ return nb_pkts;
+
+ VIRTQUEUE_DUMP(vq);
+ PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
+ nb_used = VIRTQUEUE_NUSED(vq);
+
+ virtio_rmb();
+ if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh))
+ virtio_xmit_cleanup_inorder(vq, nb_used);
+
+ if (unlikely(!vq->vq_free_cnt))
+ virtio_xmit_cleanup_inorder(vq, nb_used);
+
+ nb_avail = RTE_MIN(vq->vq_free_cnt, nb_pkts);
+
+ for (nb_tx = 0; nb_tx < nb_avail; nb_tx++) {
+ struct rte_mbuf *txm = tx_pkts[nb_tx];
+ int slots, need;
+
+ /* Do VLAN tag insertion */
+ if (unlikely(txm->ol_flags & PKT_TX_VLAN_PKT)) {
+ error = rte_vlan_insert(&txm);
+ if (unlikely(error)) {
+ rte_pktmbuf_free(txm);
+ continue;
+ }
+ }
+
+ /* optimize ring usage */
+ if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
+ vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
+ rte_mbuf_refcnt_read(txm) == 1 &&
+ RTE_MBUF_DIRECT(txm) &&
+ txm->nb_segs == 1 &&
+ rte_pktmbuf_headroom(txm) >= hdr_size &&
+ rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
+ __alignof__(struct virtio_net_hdr_mrg_rxbuf))) {
+ inorder_pkts[nb_inorder_pkts] = txm;
+ nb_inorder_pkts++;
+
+ txvq->stats.bytes += txm->pkt_len;
+ virtio_update_packet_stats(&txvq->stats, txm);
+ continue;
+ }
+
+ if (nb_inorder_pkts) {
+ virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts,
+ nb_inorder_pkts);
+ nb_inorder_pkts = 0;
+ }
+
+ slots = txm->nb_segs + 1;
+ need = slots - vq->vq_free_cnt;
+ if (unlikely(need > 0)) {
+ nb_used = VIRTQUEUE_NUSED(vq);
+ virtio_rmb();
+ need = RTE_MIN(need, (int)nb_used);
+
+ virtio_xmit_cleanup_inorder(vq, need);
+
+ need = slots - vq->vq_free_cnt;
+
+ if (unlikely(need > 0)) {
+ PMD_TX_LOG(ERR,
+ "No free tx descriptors to transmit");
+ break;
+ }
+ }
+ /* Enqueue Packet buffers */
+ virtqueue_enqueue_xmit(txvq, txm, slots, 0, 0, 1);
+
+ txvq->stats.bytes += txm->pkt_len;
+ virtio_update_packet_stats(&txvq->stats, txm);
+ }
+
+ /* Transmit all inorder packets */
+ if (nb_inorder_pkts)
+ virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts,
+ nb_inorder_pkts);
+
+ txvq->stats.packets += nb_tx;
+
+ if (likely(nb_tx)) {
+ vq_update_avail_idx(vq);
+
+ if (unlikely(virtqueue_kick_prepare(vq))) {
+ virtqueue_notify(vq);
+ PMD_TX_LOG(DEBUG, "Notified backend after xmit");
+ }
+ }
+
+ VIRTQUEUE_DUMP(vq);
+
+ return nb_tx;
+}