[dpdk-dev,v2,2/2] net/mlx5: remove redundant checks
Checks
Commit Message
Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Xueming Li <xuemingl@mellanox.com>
---
v2:
* add missing 'Acked-by' tag.
drivers/net/mlx5/mlx5_rxtx.c | 6 ++----
drivers/net/mlx5/mlx5_rxtx.h | 14 +++++++-------
2 files changed, 9 insertions(+), 11 deletions(-)
Comments
Hi Koh,
Please see question below
Tuesday, May 22, 2018 9:57 AM, Yongseok Koh:
> Subject: [PATCH v2 2/2] net/mlx5: remove redundant checks
>
> Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
> Acked-by: Xueming Li <xuemingl@mellanox.com>
> ---
>
> v2:
> * add missing 'Acked-by' tag.
>
> drivers/net/mlx5/mlx5_rxtx.c | 6 ++---- drivers/net/mlx5/mlx5_rxtx.h | 14
> +++++++-------
> 2 files changed, 9 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
> index cdd373e3e..527859461 100644
> --- a/drivers/net/mlx5/mlx5_rxtx.c
> +++ b/drivers/net/mlx5/mlx5_rxtx.c
> @@ -522,7 +522,6 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf
> **pkts, uint16_t pkts_n)
> uint16_t ehdr;
> uint8_t cs_flags;
> uint8_t tso = txq->tso_en && (buf->ol_flags &
> PKT_TX_TCP_SEG);
> - uint8_t is_vlan = !!(buf->ol_flags & PKT_TX_VLAN_PKT);
> uint32_t swp_offsets = 0;
> uint8_t swp_types = 0;
> uint16_t tso_segsz = 0;
> @@ -566,11 +565,10 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf
> **pkts, uint16_t pkts_n)
> rte_prefetch0(
> rte_pktmbuf_mtod(*(pkts + 1), volatile void *));
> cs_flags = txq_ol_cksum_to_cs(buf);
> - txq_mbuf_to_swp(txq, buf, tso, is_vlan,
> - (uint8_t *)&swp_offsets, &swp_types);
> + txq_mbuf_to_swp(txq, buf, (uint8_t *)&swp_offsets,
> &swp_types);
> raw = ((uint8_t *)(uintptr_t)wqe) + 2 *
> MLX5_WQE_DWORD_SIZE;
> /* Replace the Ethernet type by the VLAN if necessary. */
> - if (is_vlan) {
> + if (buf->ol_flags & PKT_TX_VLAN_PKT) {
> uint32_t vlan = rte_cpu_to_be_32(0x81000000 |
> buf->vlan_tci);
> unsigned int len = 2 * ETHER_ADDR_LEN - 2; diff --git
> a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h index
> 1e4b2fdb9..5d9a7dffd 100644
> --- a/drivers/net/mlx5/mlx5_rxtx.h
> +++ b/drivers/net/mlx5/mlx5_rxtx.h
> @@ -651,10 +651,10 @@ mlx5_tx_dbrec(struct mlx5_txq_data *txq, volatile
> struct mlx5_wqe *wqe)
> */
> static __rte_always_inline void
> txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct rte_mbuf *buf,
> - uint8_t tso, uint64_t vlan,
> - uint8_t *offsets, uint8_t *swp_types)
> + uint8_t *offsets, uint8_t *swp_types)
> {
> - uint64_t tunnel = buf->ol_flags & PKT_TX_TUNNEL_MASK;
> + const uint64_t vlan = buf->ol_flags & PKT_TX_VLAN_PKT;
> + const uint64_t tunnel = buf->ol_flags & PKT_TX_TUNNEL_MASK;
> const uint64_t csum_flags = buf->ol_flags & PKT_TX_L4_MASK;
> const uint64_t inner_ip =
> buf->ol_flags & (PKT_TX_IPV4 | PKT_TX_IPV6); @@ -663,8
> +663,8 @@ txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct rte_mbuf
> *buf,
> uint16_t idx;
> uint16_t off;
>
> - if (likely(!tunnel || !txq->swp_en ||
> - (tunnel != PKT_TX_TUNNEL_UDP && tunnel !=
> PKT_TX_TUNNEL_IP)))
> + if (likely(!txq->swp_en || (tunnel != PKT_TX_TUNNEL_UDP &&
> + tunnel != PKT_TX_TUNNEL_IP)))
> return;
> /*
> * The index should have:
> @@ -684,7 +684,7 @@ txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct
> rte_mbuf *buf,
> * in if any of SWP offsets is set. Therefore, all of the L3 offsets
> * should be set regardless of HW offload.
> */
> - off = buf->outer_l2_len + (vlan ? 4 : 0);
> + off = buf->outer_l2_len + (vlan ? sizeof(struct vlan_hdr) : 0);
> offsets[1] = off >> 1; /* Outer L3 offset. */
> if (tunnel == PKT_TX_TUNNEL_UDP) {
> off += buf->outer_l3_len;
> @@ -693,7 +693,7 @@ txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct
> rte_mbuf *buf,
> if (inner_ip) {
> off += buf->l2_len;
> offsets[3] = off >> 1; /* Inner L3 offset. */
> - if (csum_flags == PKT_TX_TCP_CKSUM || tso ||
> + if (csum_flags == PKT_TX_TCP_CKSUM ||
Why are you removing the tso?
Per my understanding application can set only the PKT_TX_TCP_SEG for TSO and this implies TCP checksum.
> csum_flags == PKT_TX_UDP_CKSUM) {
> off += buf->l3_len;
> offsets[2] = off >> 1; /* Inner L4 offset. */
> --
> 2.11.0
> On May 22, 2018, at 12:43 AM, Shahaf Shuler <shahafs@mellanox.com> wrote:
>
> Hi Koh,
>
> Please see question below
>
> Tuesday, May 22, 2018 9:57 AM, Yongseok Koh:
>> Subject: [PATCH v2 2/2] net/mlx5: remove redundant checks
>>
>> Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
>> Acked-by: Xueming Li <xuemingl@mellanox.com>
>> ---
>>
>> v2:
>> * add missing 'Acked-by' tag.
>>
>> drivers/net/mlx5/mlx5_rxtx.c | 6 ++---- drivers/net/mlx5/mlx5_rxtx.h | 14
>> +++++++-------
>> 2 files changed, 9 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
>> index cdd373e3e..527859461 100644
>> --- a/drivers/net/mlx5/mlx5_rxtx.c
>> +++ b/drivers/net/mlx5/mlx5_rxtx.c
>> @@ -522,7 +522,6 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf
>> **pkts, uint16_t pkts_n)
>> uint16_t ehdr;
>> uint8_t cs_flags;
>> uint8_t tso = txq->tso_en && (buf->ol_flags &
>> PKT_TX_TCP_SEG);
>> - uint8_t is_vlan = !!(buf->ol_flags & PKT_TX_VLAN_PKT);
>> uint32_t swp_offsets = 0;
>> uint8_t swp_types = 0;
>> uint16_t tso_segsz = 0;
>> @@ -566,11 +565,10 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf
>> **pkts, uint16_t pkts_n)
>> rte_prefetch0(
>> rte_pktmbuf_mtod(*(pkts + 1), volatile void *));
>> cs_flags = txq_ol_cksum_to_cs(buf);
>> - txq_mbuf_to_swp(txq, buf, tso, is_vlan,
>> - (uint8_t *)&swp_offsets, &swp_types);
>> + txq_mbuf_to_swp(txq, buf, (uint8_t *)&swp_offsets,
>> &swp_types);
>> raw = ((uint8_t *)(uintptr_t)wqe) + 2 *
>> MLX5_WQE_DWORD_SIZE;
>> /* Replace the Ethernet type by the VLAN if necessary. */
>> - if (is_vlan) {
>> + if (buf->ol_flags & PKT_TX_VLAN_PKT) {
>> uint32_t vlan = rte_cpu_to_be_32(0x81000000 |
>> buf->vlan_tci);
>> unsigned int len = 2 * ETHER_ADDR_LEN - 2; diff --git
>> a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h index
>> 1e4b2fdb9..5d9a7dffd 100644
>> --- a/drivers/net/mlx5/mlx5_rxtx.h
>> +++ b/drivers/net/mlx5/mlx5_rxtx.h
>> @@ -651,10 +651,10 @@ mlx5_tx_dbrec(struct mlx5_txq_data *txq, volatile
>> struct mlx5_wqe *wqe)
>> */
>> static __rte_always_inline void
>> txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct rte_mbuf *buf,
>> - uint8_t tso, uint64_t vlan,
>> - uint8_t *offsets, uint8_t *swp_types)
>> + uint8_t *offsets, uint8_t *swp_types)
>> {
>> - uint64_t tunnel = buf->ol_flags & PKT_TX_TUNNEL_MASK;
>> + const uint64_t vlan = buf->ol_flags & PKT_TX_VLAN_PKT;
>> + const uint64_t tunnel = buf->ol_flags & PKT_TX_TUNNEL_MASK;
>> const uint64_t csum_flags = buf->ol_flags & PKT_TX_L4_MASK;
>> const uint64_t inner_ip =
>> buf->ol_flags & (PKT_TX_IPV4 | PKT_TX_IPV6); @@ -663,8
>> +663,8 @@ txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct rte_mbuf
>> *buf,
>> uint16_t idx;
>> uint16_t off;
>>
>> - if (likely(!tunnel || !txq->swp_en ||
>> - (tunnel != PKT_TX_TUNNEL_UDP && tunnel !=
>> PKT_TX_TUNNEL_IP)))
>> + if (likely(!txq->swp_en || (tunnel != PKT_TX_TUNNEL_UDP &&
>> + tunnel != PKT_TX_TUNNEL_IP)))
>> return;
>> /*
>> * The index should have:
>> @@ -684,7 +684,7 @@ txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct
>> rte_mbuf *buf,
>> * in if any of SWP offsets is set. Therefore, all of the L3 offsets
>> * should be set regardless of HW offload.
>> */
>> - off = buf->outer_l2_len + (vlan ? 4 : 0);
>> + off = buf->outer_l2_len + (vlan ? sizeof(struct vlan_hdr) : 0);
>> offsets[1] = off >> 1; /* Outer L3 offset. */
>> if (tunnel == PKT_TX_TUNNEL_UDP) {
>> off += buf->outer_l3_len;
>> @@ -693,7 +693,7 @@ txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct
>> rte_mbuf *buf,
>> if (inner_ip) {
>> off += buf->l2_len;
>> offsets[3] = off >> 1; /* Inner L3 offset. */
>> - if (csum_flags == PKT_TX_TCP_CKSUM || tso ||
>> + if (csum_flags == PKT_TX_TCP_CKSUM ||
>
> Why are you removing the tso?
> Per my understanding application can set only the PKT_TX_TCP_SEG for TSO and this implies TCP checksum.
Right. I don't know why but I wrongly thought PKT_TX_TCP_SEG enforces PKT_TX_TCP_CKSUM.
Have to restore it.
Thanks,
Yongseok
>> csum_flags == PKT_TX_UDP_CKSUM) {
>> off += buf->l3_len;
>> offsets[2] = off >> 1; /* Inner L4 offset. */
>> --
>> 2.11.0
@@ -522,7 +522,6 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
uint16_t ehdr;
uint8_t cs_flags;
uint8_t tso = txq->tso_en && (buf->ol_flags & PKT_TX_TCP_SEG);
- uint8_t is_vlan = !!(buf->ol_flags & PKT_TX_VLAN_PKT);
uint32_t swp_offsets = 0;
uint8_t swp_types = 0;
uint16_t tso_segsz = 0;
@@ -566,11 +565,10 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
rte_prefetch0(
rte_pktmbuf_mtod(*(pkts + 1), volatile void *));
cs_flags = txq_ol_cksum_to_cs(buf);
- txq_mbuf_to_swp(txq, buf, tso, is_vlan,
- (uint8_t *)&swp_offsets, &swp_types);
+ txq_mbuf_to_swp(txq, buf, (uint8_t *)&swp_offsets, &swp_types);
raw = ((uint8_t *)(uintptr_t)wqe) + 2 * MLX5_WQE_DWORD_SIZE;
/* Replace the Ethernet type by the VLAN if necessary. */
- if (is_vlan) {
+ if (buf->ol_flags & PKT_TX_VLAN_PKT) {
uint32_t vlan = rte_cpu_to_be_32(0x81000000 |
buf->vlan_tci);
unsigned int len = 2 * ETHER_ADDR_LEN - 2;
@@ -651,10 +651,10 @@ mlx5_tx_dbrec(struct mlx5_txq_data *txq, volatile struct mlx5_wqe *wqe)
*/
static __rte_always_inline void
txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct rte_mbuf *buf,
- uint8_t tso, uint64_t vlan,
- uint8_t *offsets, uint8_t *swp_types)
+ uint8_t *offsets, uint8_t *swp_types)
{
- uint64_t tunnel = buf->ol_flags & PKT_TX_TUNNEL_MASK;
+ const uint64_t vlan = buf->ol_flags & PKT_TX_VLAN_PKT;
+ const uint64_t tunnel = buf->ol_flags & PKT_TX_TUNNEL_MASK;
const uint64_t csum_flags = buf->ol_flags & PKT_TX_L4_MASK;
const uint64_t inner_ip =
buf->ol_flags & (PKT_TX_IPV4 | PKT_TX_IPV6);
@@ -663,8 +663,8 @@ txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct rte_mbuf *buf,
uint16_t idx;
uint16_t off;
- if (likely(!tunnel || !txq->swp_en ||
- (tunnel != PKT_TX_TUNNEL_UDP && tunnel != PKT_TX_TUNNEL_IP)))
+ if (likely(!txq->swp_en || (tunnel != PKT_TX_TUNNEL_UDP &&
+ tunnel != PKT_TX_TUNNEL_IP)))
return;
/*
* The index should have:
@@ -684,7 +684,7 @@ txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct rte_mbuf *buf,
* in if any of SWP offsets is set. Therefore, all of the L3 offsets
* should be set regardless of HW offload.
*/
- off = buf->outer_l2_len + (vlan ? 4 : 0);
+ off = buf->outer_l2_len + (vlan ? sizeof(struct vlan_hdr) : 0);
offsets[1] = off >> 1; /* Outer L3 offset. */
if (tunnel == PKT_TX_TUNNEL_UDP) {
off += buf->outer_l3_len;
@@ -693,7 +693,7 @@ txq_mbuf_to_swp(struct mlx5_txq_data *txq, struct rte_mbuf *buf,
if (inner_ip) {
off += buf->l2_len;
offsets[3] = off >> 1; /* Inner L3 offset. */
- if (csum_flags == PKT_TX_TCP_CKSUM || tso ||
+ if (csum_flags == PKT_TX_TCP_CKSUM ||
csum_flags == PKT_TX_UDP_CKSUM) {
off += buf->l3_len;
offsets[2] = off >> 1; /* Inner L4 offset. */