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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/init.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/init.c')
-rw-r--r--src/plugins/dpdk/device/init.c26
1 files changed, 23 insertions, 3 deletions
diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c
index 4faf6290dba..096b8d382fe 100644
--- a/src/plugins/dpdk/device/init.c
+++ b/src/plugins/dpdk/device/init.c
@@ -70,11 +70,15 @@ const struct
};
static clib_error_t *
-dpdk_set_mtu (vnet_main_t *vnm, vnet_hw_interface_t *hi, u32 mtu)
+dpdk_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
+ u32 frame_size)
{
dpdk_main_t *dm = &dpdk_main;
dpdk_device_t *xd = vec_elt_at_index (dm->devices, hi->dev_instance);
int rv;
+ u32 mtu;
+
+ mtu = frame_size - xd->driver_frame_overhead;
rv = rte_eth_dev_set_mtu (xd->port_id, mtu);
@@ -99,7 +103,8 @@ dpdk_set_mtu (vnet_main_t *vnm, vnet_hw_interface_t *hi, u32 mtu)
}
}
else
- dpdk_log_debug ("[%u] mtu set to %u", xd->port_id, mtu);
+ dpdk_log_debug ("[%u] max_frame_size set to %u by setting MTU to %u",
+ xd->port_id, frame_size, mtu);
return 0;
}
@@ -376,6 +381,21 @@ dpdk_lib_init (dpdk_main_t * dm)
xd->conf.rss_hf &= di.flow_type_rss_offloads;
}
+ xd->driver_frame_overhead =
+ RTE_ETHER_HDR_LEN + 2 * RTE_VLAN_HLEN + RTE_ETHER_CRC_LEN;
+#if RTE_VERSION >= RTE_VERSION_NUM(21, 11, 0, 0)
+ q = di.max_rx_pktlen - di.max_mtu;
+
+ if (q < xd->driver_frame_overhead && q > 0)
+ xd->driver_frame_overhead = q;
+ 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, di.min_mtu, di.max_mtu, di.min_rx_bufsize,
+ di.max_rx_pktlen, di.max_lro_pkt_size);
+#endif
+ dpdk_log_debug ("[%u] driver frame overhead is %u", port_id,
+ xd->driver_frame_overhead);
+
/* number of RX and TX tescriptors */
if (devconf->num_rx_desc)
xd->conf.n_rx_desc = devconf->num_rx_desc;
@@ -397,7 +417,7 @@ dpdk_lib_init (dpdk_main_t * dm)
eir.dev_instance = xd->device_index;
eir.address = addr;
eir.cb.flag_change = dpdk_flag_change;
- eir.cb.set_mtu = dpdk_set_mtu;
+ eir.cb.set_max_frame_size = dpdk_set_max_frame_size;
xd->hw_if_index = vnet_eth_register_interface (vnm, &eir);
hi = vnet_get_hw_interface (vnm, xd->hw_if_index);
hi->numa_node = xd->cpu_socket = (i8) rte_eth_dev_socket_id (port_id);