In the next patch, access to struct pmd_internals will be necessary in
tap_flow.c to store the flows.
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Olga Shern <olgas@mellanox.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
A tap netdevice does not support flow control; ensure nothing but
RTE_FC_NONE mode can be set.
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
A tap netdevice actually receives every packet, without any filtering
whatsoever. There is no need for any multicast address registration
to receive multicast packets.
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
The MTU is assigned to the tap netdevice according to the argument, but
packet transmission and reception just write/read on an fd with the
default limit being the socket buffer size.
As a new rte_eth_dev_data is allocated during tap device init, ensure it
is set again dev->data->mtu.
Once the actual netdevice is created via tun_alloc(), make sure to apply
the desired MTU to the netdevice.
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
As soon as the netdevice is created, update pmd->mac_addr with its
actual MAC address.
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
Create a socket for ioctl at tap device creation instead of opening it
and closing it every call to tap_link_set_flags().
Use a common tap_ioctl() function that can be extended for various uses
(such as MTU change, MAC address change, ...).
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
There is no reason not to support ARP on a tap netdevice. Remove
IFF_NOARP flags.
Focus on IFF_UP when a link status change is required.
Fixes: f457b472b1f2 ("net/tap: add link up and down operations")
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
This commit adds a signal-based trigger to the Rx burst function in order
to avoid unnecessary system calls while Rx queues are empty.
Triggered Rx bursts put less pressure on the kernel, free up CPU resources
for applications and result in a noticeable performance improvement when
sharing CPU threads with other PMDs.
Measuring the traffic forwarding rate between two physical devices in
testpmd (IO mode, single thread, 64B packets) before and after adding two
tap PMD instances (4 ports total) that do not process any traffic and
comparing results yields:
Without Rx trigger:
-15% (--burst=32)
-62% (--burst=1)
With Rx trigger:
-0.3% (--burst=32)
-6% (--burst=1)
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Acked-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
Polling the Tx queue file descriptor before writing to it is not mandatory
since it is configured as non-blocking.
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Acked-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
Store the device name in dev->data->name, to have symmetrical behavior
between rte_pmd_tap_probe(name) and rte_pmd_tap_remove(name).
The netdevice name (linux interface name) is stored in the name field of
struct pmd_internals.
snprintf(data->name) has been moved closer to the rte_ethdev_allocate()
as it should use the same name.
Fixes: 02f96a0a82d1 ("net/tap: add TUN/TAP device PMD")
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
Calling strncpy with a maximum size argument of 16 bytes on destination
array "ifr.ifr_ifrn.ifrn_name" of size 16 bytes might leave the
destination string unterminated.
Coverity issue: 1407499
Fixes: 6b38b2725cdb ("net/tap: fix multi-queue support")
Cc: stable@dpdk.org
Signed-off-by: Keith Wiles <keith.wiles@intel.com>
Before this patch, the management of dependencies between directories
had several issues:
- the generation of .depdirs, done at configuration is slow: it can take
more than one minute on some slow targets (usually ~10s on a standard
PC without -j).
- for instance, it is possible to express a dependency like:
- app/foo depends on lib/librte_foo
- and lib/librte_foo depends on app/bar
But this won't work because the directories are traversed with a
depth-first algorithm, so we have to choose between doing 'app' before
or after 'lib'.
- the script depdirs-rule.sh is too complex.
- we cannot use "make -d" for debug, because the output of make is used for
the generation of .depdirs.
This patch moves the DEPDIRS-* variables in the upper Makefile, making
the dependencies much easier to calculate. A DEPDIRS variable is still
used to process library dependencies in LDLIBS.
After this commit, "make config" is almost immediate.
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Tested-by: Robin Jarry <robin.jarry@6wind.com>
Tested-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Fixes: f457b472b1f2 ("net/tap: add link up and down operations")
Signed-off-by: Keith Wiles <keith.wiles@intel.com>
Acked-by: Pascal Mazon <pascal.mazon@6wind.com>
At the same time remove the code which created the first device queue
at probe time. Now all queues are created during queue setup calls.
Fixes: 02f96a0a82d1 ("net/tap: add TUN/TAP device PMD")
Signed-off-by: Keith Wiles <keith.wiles@intel.com>
Acked-by: Pascal Mazon <pascal.mazon@6wind.com>
The probe parses for user-defined iface name. Let's use that value.
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
There's no point in having a different internal MAC address than the one
provided by the kernel when creating the netdevice.
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
pmd->fds[0], pmd->rxq[0] and pmd->txq[0] are set a couple of lines after
the for loop that initializes them to -1.
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
dev->data->name contains the device name, e.g. "net_tap0".
dev->data->dev_private->name contains the actual iface name,
e.g. "dtap0".
In any case, the name must to be consistent with the tun_alloc() call in
eth_dev_tap_create().
Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
Rx and Tx queues share the common tap file descriptor, but save this
value separately.
Setting up Rx/Tx queue sets up both queues, release_queue close the
tap file but update file descriptor only for that queue.
This makes other queue's file descriptor invalid.
As a workaround, prevent release_queue callback to be called by default.
This is done by separating Rx/Tx setup functions, so that each only
setup its own queue, this prevents rte_eth_rx/tx_queue_setup() calling
release_queue before setup_queue.
Fixes: 02f96a0a82d1 ("net/tap: add TUN/TAP device PMD")
Signed-off-by: Keith Wiles <keith.wiles@intel.com>
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
IFF_MULTI_QUEUE does not exist in older kernels:
drivers/net/tap/rte_eth_tap.c:143:19: error: ‘IFF_MULTI_QUEUE’ undeclared
Signed-off-by: Keith Wiles <keith.wiles@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
The PMD allows for DPDK and the host to communicate using a raw
device interface on the host and in the DPDK application. The device
created is a Tap device with a L2 packet header.
Signed-off-by: Keith Wiles <keith.wiles@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
Tested-by: Aws Ismail <aismail@ciena.com>
Tested-by: Vasily Philipov <vasilyf@mellanox.com>
