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authorDamjan Marion <damarion@cisco.com>2022-01-17 14:49:17 +0100
committerOle Tr�an <otroan@employees.org>2022-01-18 13:20:21 +0000
commit1cd0e5dd533f4209dde453eaa43215e52cd42985 (patch)
tree88ed4b47252cfe27c13ac0f85a6cfc86a7052d5b /src/plugins/dpdk/device/common.c
parent49378f206b8e780a898e632f7dd8db912b9b118e (diff)
vnet: distinguish between max_frame_size and MTU
Type: improvement Change-Id: I3659de6599f402c92e3855e3bf0e5e3388f2bea0 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/plugins/dpdk/device/common.c')
-rw-r--r--src/plugins/dpdk/device/common.c63
1 files changed, 33 insertions, 30 deletions
diff --git a/src/plugins/dpdk/device/common.c b/src/plugins/dpdk/device/common.c
index 3eca847de79..0f54a616773 100644
--- a/src/plugins/dpdk/device/common.c
+++ b/src/plugins/dpdk/device/common.c
@@ -61,6 +61,7 @@ dpdk_device_setup (dpdk_device_t * xd)
vlib_thread_main_t *tm = vlib_get_thread_main ();
vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, xd->sw_if_index);
vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, xd->hw_if_index);
+ u16 buf_sz = vlib_buffer_get_default_data_size (vm);
vnet_hw_if_caps_change_t caps = {};
struct rte_eth_dev_info dev_info;
struct rte_eth_conf conf = {};
@@ -161,49 +162,51 @@ dpdk_device_setup (dpdk_device_t * xd)
#if RTE_VERSION < RTE_VERSION_NUM(21, 11, 0, 0)
if (rxo & DEV_RX_OFFLOAD_JUMBO_FRAME)
- conf.rxmode.max_rx_pkt_len =
- clib_min (ETHERNET_MAX_PACKET_BYTES, dev_info.max_rx_pktlen);
+ {
+ conf.rxmode.max_rx_pkt_len = dev_info.max_rx_pktlen;
+ xd->max_supported_frame_size = dev_info.max_rx_pktlen;
+ mtu = xd->max_supported_frame_size - xd->driver_frame_overhead;
+ }
+ else
+ {
+ mtu = 1500;
+ xd->max_supported_frame_size = mtu + xd->driver_frame_overhead;
+ }
#else
- dpdk_log_debug ("[%u] min_mtu: %u, max_mtu: %u, min_rx_bufsize: %u, "
- "max_rx_pktlen: %u, max_lro_pkt_size: %u",
- xd->port_id, dev_info.min_mtu, dev_info.max_mtu,
- dev_info.min_rx_bufsize, dev_info.max_rx_pktlen,
- dev_info.max_lro_pkt_size);
-
- mtu = xd->conf.disable_multi_seg ? 2000 : ETHERNET_MAX_PACKET_BYTES;
- conf.rxmode.mtu = clib_min (mtu, dev_info.max_rx_pktlen);
+ if (xd->conf.disable_multi_seg)
+ xd->max_supported_frame_size = clib_min (dev_info.max_rx_pktlen, buf_sz);
+ else
+ xd->max_supported_frame_size = dev_info.max_rx_pktlen;
+#endif
+
+ mtu = clib_min (xd->max_supported_frame_size - xd->driver_frame_overhead,
+ ethernet_main.default_mtu);
+ mtu = mtu + hi->frame_overhead - xd->driver_frame_overhead;
+
+#if RTE_VERSION >= RTE_VERSION_NUM(21, 11, 0, 0)
+ conf.rxmode.mtu = mtu;
#endif
retry:
rv = rte_eth_dev_configure (xd->port_id, xd->conf.n_rx_queues,
xd->conf.n_tx_queues, &conf);
-
if (rv < 0 && conf.intr_conf.rxq)
{
conf.intr_conf.rxq = 0;
goto retry;
}
- if (rv < 0)
- {
- dpdk_device_error (xd, "rte_eth_dev_configure", rv);
- goto error;
- }
-
- rte_eth_dev_get_mtu (xd->port_id, &mtu);
- dpdk_log_debug ("[%u] device default mtu %u", xd->port_id, mtu);
+#if RTE_VERSION < RTE_VERSION_NUM(21, 11, 0, 0)
+ rte_eth_dev_set_mtu (xd->port_id, mtu);
+#endif
- hi->max_supported_packet_bytes = mtu;
- if (hi->max_packet_bytes > mtu)
- {
- vnet_hw_interface_set_mtu (vnm, xd->hw_if_index, mtu);
- }
- else
- {
- rte_eth_dev_set_mtu (xd->port_id, hi->max_packet_bytes);
- dpdk_log_debug ("[%u] port mtu set to %u", xd->port_id,
- hi->max_packet_bytes);
- }
+ hi->max_frame_size = 0;
+ vnet_hw_interface_set_max_frame_size (vnm, xd->hw_if_index,
+ mtu + hi->frame_overhead);
+ dpdk_log_debug ("[%u] mtu %u max_frame_size %u max max_frame_size %u "
+ "driver_frame_overhead %u",
+ xd->port_id, mtu, hi->max_frame_size,
+ xd->max_supported_frame_size, xd->driver_frame_overhead);
vec_validate_aligned (xd->tx_queues, xd->conf.n_tx_queues - 1,
CLIB_CACHE_LINE_BYTES);