[dpdk-dev] [PATCH v2 09/15] net/enic: support mbuf fast free offload
John Daley
johndale at cisco.com
Fri Jun 29 11:29:38 CEST 2018
From: Hyong Youb Kim <hyonkim at cisco.com>
Signed-off-by: Hyong Youb Kim <hyonkim at cisco.com>
Reviewed-by: John Daley <johndale at cisco.com>
---
v2: documented new feature in enic.ini file
doc/guides/nics/features/enic.ini | 1 +
drivers/net/enic/base/vnic_wq.h | 1 +
drivers/net/enic/enic.h | 1 +
drivers/net/enic/enic_ethdev.c | 11 ++++++++---
drivers/net/enic/enic_res.c | 2 ++
drivers/net/enic/enic_rxtx.c | 30 +++++++++++++++++++++++++++++-
6 files changed, 42 insertions(+), 4 deletions(-)
diff --git a/doc/guides/nics/features/enic.ini b/doc/guides/nics/features/enic.ini
index ae46d299a..31a3fb5cf 100644
--- a/doc/guides/nics/features/enic.ini
+++ b/doc/guides/nics/features/enic.ini
@@ -6,6 +6,7 @@
[Features]
Link status = Y
Link status event = Y
+Fast mbuf free = Y
Rx interrupt = Y
Queue start/stop = Y
MTU update = Y
diff --git a/drivers/net/enic/base/vnic_wq.h b/drivers/net/enic/base/vnic_wq.h
index 86ac10e28..6622a8a2d 100644
--- a/drivers/net/enic/base/vnic_wq.h
+++ b/drivers/net/enic/base/vnic_wq.h
@@ -48,6 +48,7 @@ struct vnic_wq {
unsigned int socket_id;
const struct rte_memzone *cqmsg_rz;
uint16_t last_completed_index;
+ uint64_t offloads;
};
static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq)
diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index b611f0a24..af790fc2e 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -183,6 +183,7 @@ struct enic {
uint64_t rx_offload_capa; /* DEV_RX_OFFLOAD flags */
uint64_t tx_offload_capa; /* DEV_TX_OFFLOAD flags */
+ uint64_t tx_queue_offload_capa; /* DEV_TX_OFFLOAD flags */
uint64_t tx_offload_mask; /* PKT_TX flags accepted */
};
diff --git a/drivers/net/enic/enic_ethdev.c b/drivers/net/enic/enic_ethdev.c
index 117b362de..ef18f8802 100644
--- a/drivers/net/enic/enic_ethdev.c
+++ b/drivers/net/enic/enic_ethdev.c
@@ -185,17 +185,21 @@ static int enicpmd_dev_tx_queue_setup(struct rte_eth_dev *eth_dev,
uint16_t queue_idx,
uint16_t nb_desc,
unsigned int socket_id,
- __rte_unused const struct rte_eth_txconf *tx_conf)
+ const struct rte_eth_txconf *tx_conf)
{
int ret;
struct enic *enic = pmd_priv(eth_dev);
+ struct vnic_wq *wq;
if (rte_eal_process_type() != RTE_PROC_PRIMARY)
return -E_RTE_SECONDARY;
ENICPMD_FUNC_TRACE();
RTE_ASSERT(queue_idx < enic->conf_wq_count);
- eth_dev->data->tx_queues[queue_idx] = (void *)&enic->wq[queue_idx];
+ wq = &enic->wq[queue_idx];
+ wq->offloads = tx_conf->offloads |
+ eth_dev->data->dev_conf.txmode.offloads;
+ eth_dev->data->tx_queues[queue_idx] = (void *)wq;
ret = enic_alloc_wq(enic, queue_idx, socket_id, nb_desc);
if (ret) {
@@ -477,6 +481,7 @@ static void enicpmd_dev_info_get(struct rte_eth_dev *eth_dev,
device_info->max_mac_addrs = ENIC_MAX_MAC_ADDR;
device_info->rx_offload_capa = enic->rx_offload_capa;
device_info->tx_offload_capa = enic->tx_offload_capa;
+ device_info->tx_queue_offload_capa = enic->tx_queue_offload_capa;
device_info->default_rxconf = (struct rte_eth_rxconf) {
.rx_free_thresh = ENIC_DEFAULT_RX_FREE_THRESH
};
@@ -765,7 +770,7 @@ static void enicpmd_dev_txq_info_get(struct rte_eth_dev *dev,
ENICPMD_FUNC_TRACE();
qinfo->nb_desc = wq->ring.desc_count;
memset(&qinfo->conf, 0, sizeof(qinfo->conf));
- qinfo->conf.offloads = enic->tx_offload_capa;
+ qinfo->conf.offloads = wq->offloads;
/* tx_thresh, and all the other fields are not applicable for enic */
}
diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c
index d1113b2f1..11d66a626 100644
--- a/drivers/net/enic/enic_res.c
+++ b/drivers/net/enic/enic_res.c
@@ -183,7 +183,9 @@ int enic_get_vnic_config(struct enic *enic)
* Default hardware capabilities. enic_dev_init() may add additional
* flags if it enables overlay offloads.
*/
+ enic->tx_queue_offload_capa = DEV_TX_OFFLOAD_MBUF_FAST_FREE;
enic->tx_offload_capa =
+ enic->tx_queue_offload_capa |
DEV_TX_OFFLOAD_MULTI_SEGS |
DEV_TX_OFFLOAD_VLAN_INSERT |
DEV_TX_OFFLOAD_IPV4_CKSUM |
diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
index 549288c20..89a1e66fe 100644
--- a/drivers/net/enic/enic_rxtx.c
+++ b/drivers/net/enic/enic_rxtx.c
@@ -471,6 +471,31 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
return nb_rx;
}
+static void enic_fast_free_wq_bufs(struct vnic_wq *wq, u16 completed_index)
+{
+ unsigned int desc_count, n, nb_to_free, tail_idx;
+ struct rte_mempool *pool;
+ struct rte_mbuf **m;
+
+ desc_count = wq->ring.desc_count;
+ nb_to_free = enic_ring_sub(desc_count, wq->tail_idx, completed_index)
+ + 1;
+ tail_idx = wq->tail_idx;
+ wq->tail_idx += nb_to_free;
+ wq->ring.desc_avail += nb_to_free;
+ if (wq->tail_idx >= desc_count)
+ wq->tail_idx -= desc_count;
+ /* First, free at most until the end of ring */
+ m = &wq->bufs[tail_idx];
+ pool = (*m)->pool;
+ n = RTE_MIN(nb_to_free, desc_count - tail_idx);
+ rte_mempool_put_bulk(pool, (void **)m, n);
+ n = nb_to_free - n;
+ /* Then wrap and free the rest */
+ if (unlikely(n))
+ rte_mempool_put_bulk(pool, (void **)wq->bufs, n);
+}
+
static inline void enic_free_wq_bufs(struct vnic_wq *wq, u16 completed_index)
{
struct rte_mbuf *buf;
@@ -518,7 +543,10 @@ unsigned int enic_cleanup_wq(__rte_unused struct enic *enic, struct vnic_wq *wq)
completed_index = *((uint32_t *)wq->cqmsg_rz->addr) & 0xffff;
if (wq->last_completed_index != completed_index) {
- enic_free_wq_bufs(wq, completed_index);
+ if (wq->offloads & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
+ enic_fast_free_wq_bufs(wq, completed_index);
+ else
+ enic_free_wq_bufs(wq, completed_index);
wq->last_completed_index = completed_index;
}
return 0;
--
2.16.2
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