From 79ec62028b9ae144e7171642120dd7e6e25fe7f7 Mon Sep 17 00:00:00 2001 From: Natalie Samsonov Date: Tue, 25 Sep 2018 09:05:04 +0200 Subject: [PATCH] net/mvpp2: update MTU and MRU related calculations This commit updates MTU and MRU related calculations. Signed-off-by: Natalie Samsonov Reviewed-by: Yelena Krivosheev Reviewed-by: Dmitri Epshtein --- drivers/net/mvpp2/mrvl_ethdev.c | 70 +++++++++++++++++++++++++-------- drivers/net/mvpp2/mrvl_ethdev.h | 7 ++++ 2 files changed, 61 insertions(+), 16 deletions(-) diff --git a/drivers/net/mvpp2/mrvl_ethdev.c b/drivers/net/mvpp2/mrvl_ethdev.c index 64c6f0fe2d..24bd0a50f0 100644 --- a/drivers/net/mvpp2/mrvl_ethdev.c +++ b/drivers/net/mvpp2/mrvl_ethdev.c @@ -316,7 +316,7 @@ mrvl_dev_configure(struct rte_eth_dev *dev) if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) dev->data->mtu = dev->data->dev_conf.rxmode.max_rx_pkt_len - - ETHER_HDR_LEN - ETHER_CRC_LEN; + MRVL_PP2_ETH_HDRS_LEN; ret = mrvl_configure_rxqs(priv, dev->data->port_id, dev->data->nb_rx_queues); @@ -366,21 +366,55 @@ static int mrvl_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) { struct mrvl_priv *priv = dev->data->dev_private; - /* extra MV_MH_SIZE bytes are required for Marvell tag */ - uint16_t mru = mtu + MV_MH_SIZE + ETHER_HDR_LEN + ETHER_CRC_LEN; + uint16_t mru; + uint16_t mbuf_data_size = 0; /* SW buffer size */ int ret; - if (mtu < ETHER_MIN_MTU || mru > MRVL_PKT_SIZE_MAX) + mru = MRVL_PP2_MTU_TO_MRU(mtu); + /* + * min_rx_buf_size is equal to mbuf data size + * if pmd didn't set it differently + */ + mbuf_data_size = dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM; + /* Prevent PMD from: + * - setting mru greater than the mbuf size resulting in + * hw and sw buffer size mismatch + * - setting mtu that requires the support of scattered packets + * when this feature has not been enabled/supported so far + * (TODO check scattered_rx flag here once scattered RX is supported). + */ + if (mru + MRVL_PKT_OFFS > mbuf_data_size) { + mru = mbuf_data_size - MRVL_PKT_OFFS; + mtu = MRVL_PP2_MRU_TO_MTU(mru); + MRVL_LOG(WARNING, "MTU too big, max MTU possible limitted " + "by current mbuf size: %u. Set MTU to %u, MRU to %u", + mbuf_data_size, mtu, mru); + } + + if (mtu < ETHER_MIN_MTU || mru > MRVL_PKT_SIZE_MAX) { + MRVL_LOG(ERR, "Invalid MTU [%u] or MRU [%u]", mtu, mru); return -EINVAL; + } + + dev->data->mtu = mtu; + dev->data->dev_conf.rxmode.max_rx_pkt_len = mru - MV_MH_SIZE; if (!priv->ppio) return 0; ret = pp2_ppio_set_mru(priv->ppio, mru); - if (ret) + if (ret) { + MRVL_LOG(ERR, "Failed to change MRU"); return ret; + } + + ret = pp2_ppio_set_mtu(priv->ppio, mtu); + if (ret) { + MRVL_LOG(ERR, "Failed to change MTU"); + return ret; + } - return pp2_ppio_set_mtu(priv->ppio, mtu); + return 0; } /** @@ -591,6 +625,9 @@ mrvl_dev_start(struct rte_eth_dev *dev) } priv->vlan_flushed = 1; } + ret = mrvl_mtu_set(dev, dev->data->mtu); + if (ret) + MRVL_LOG(ERR, "Failed to set MTU to %d", dev->data->mtu); /* For default QoS config, don't start classifier. */ if (mrvl_qos_cfg && @@ -1542,8 +1579,8 @@ mrvl_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc, { struct mrvl_priv *priv = dev->data->dev_private; struct mrvl_rxq *rxq; - uint32_t min_size, - max_rx_pkt_len = dev->data->dev_conf.rxmode.max_rx_pkt_len; + uint32_t frame_size, buf_size = rte_pktmbuf_data_room_size(mp); + uint32_t max_rx_pkt_len = dev->data->dev_conf.rxmode.max_rx_pkt_len; int ret, tc, inq; uint64_t offloads; @@ -1558,15 +1595,16 @@ mrvl_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc, return -EFAULT; } - min_size = rte_pktmbuf_data_room_size(mp) - RTE_PKTMBUF_HEADROOM - - MRVL_PKT_EFFEC_OFFS; - if (min_size < max_rx_pkt_len) { - MRVL_LOG(ERR, - "Mbuf size must be increased to %u bytes to hold up to %u bytes of data.", - max_rx_pkt_len + RTE_PKTMBUF_HEADROOM + - MRVL_PKT_EFFEC_OFFS, + frame_size = buf_size - RTE_PKTMBUF_HEADROOM - MRVL_PKT_EFFEC_OFFS; + if (frame_size < max_rx_pkt_len) { + MRVL_LOG(WARNING, + "Mbuf size must be increased to %u bytes to hold up " + "to %u bytes of data.", + buf_size + max_rx_pkt_len - frame_size, max_rx_pkt_len); - return -EINVAL; + dev->data->dev_conf.rxmode.max_rx_pkt_len = frame_size; + MRVL_LOG(INFO, "Setting max rx pkt len to %u", + dev->data->dev_conf.rxmode.max_rx_pkt_len); } if (dev->data->rx_queues[idx]) { diff --git a/drivers/net/mvpp2/mrvl_ethdev.h b/drivers/net/mvpp2/mrvl_ethdev.h index 984f31eb8c..f0ae9838d4 100644 --- a/drivers/net/mvpp2/mrvl_ethdev.h +++ b/drivers/net/mvpp2/mrvl_ethdev.h @@ -72,6 +72,13 @@ /** Minimum number of sent buffers to release from shadow queue to BM */ #define MRVL_PP2_BUF_RELEASE_BURST_SIZE 64 +#define MRVL_PP2_VLAN_TAG_LEN 4 +#define MRVL_PP2_ETH_HDRS_LEN (ETHER_HDR_LEN + ETHER_CRC_LEN + \ + (2 * MRVL_PP2_VLAN_TAG_LEN)) +#define MRVL_PP2_HDRS_LEN (MV_MH_SIZE + MRVL_PP2_ETH_HDRS_LEN) +#define MRVL_PP2_MTU_TO_MRU(mtu) ((mtu) + MRVL_PP2_HDRS_LEN) +#define MRVL_PP2_MRU_TO_MTU(mru) ((mru) - MRVL_PP2_HDRS_LEN) + /** Maximum length of a match string */ #define MRVL_MATCH_LEN 16 -- 2.20.1