8030 Commits

Author SHA1 Message Date
Yongseok Koh
f4efc0eb97 net/mlx4: add control of excessive memory pinning by kernel
A new PMD parameter (mr_ext_memseg_en) is added to control extension of
memseg when creating a MR. It is enabled by default.

If enabled, mlx4_mr_create() tries to maximize the range of MR
registration so that the LKey lookup tables on datapath become smalle
and get the best performance. However, it may worsen memory utilization
because registered memory is pinned by kernel driver. Even if a page in
the extended chunk is freed, that doesn't become reusable until the
entire memory is freed and the MR is destroyed.

To make freed pages available immediately, this parameter has to be
turned off but it could drop performance.

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
c18cf501a7 net/mlx5: enable secondary process to register DMA memory
The Memory Region (MR) for DMA memory can't be created from secondary
process due to lib/driver limitation. Whenever it is needed, secondary
process can make a request to primary process through the EAL IPC
channel (rte_mp_msg) which is established on initialization. Once a MR
is created by primary process, it is immediately visible to secondary
process because the MR list is global per a device. Thus, secondary
process can look up the list after the request is successfully returned.

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
dceb502942 net/mlx5: add control of excessive memory pinning by kernel
A new PMD parameter (mr_ext_memseg_en) is added to control extension of
memseg when creating a MR. It is enabled by default.

If enabled, mlx5_mr_create() tries to maximize the range of MR
registration so that the LKey lookup tables on datapath become smaller
and get the best performance. However, it may worsen memory utilization
because registered memory is pinned by kernel driver. Even if a page in
the extended chunk is freed, that doesn't become reusable until the
entire memory is freed and the MR is destroyed.

To make freed pages available immediately, this parameter has to be
turned off but it could drop performance.

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
207fe7ac72 net/mlx5: fix external memory registration
Secondary process is not allowed to register MR due to a restriction of
library and kernel driver.

Fixes: 7e43a32ee060 ("net/mlx5: support externally allocated static memory")
Cc: stable@dpdk.org

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
3d1f3c7c83 net/mlx: remove debug messages on datapath
Cc: stable@dpdk.org

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
0203d33a10 net/mlx4: support secondary process
In order to support secondary process, a few features are required.

a) rdma-core library should allocate device resources using DPDK's
   memory allocator.

b) UAR should be remapped for secondary processes. Currently, in order
   not to use different data structure for secondary processes, PMD
   tries to reserve identical virtual address space for both primary
   and secondary processes.

c) IPC channel is necessary, which can be easily set with rte_mp APIs.
   Through the channel, Verbs command FD is delivered to the secondary
   process and the device stop/start event is also broadcast from
   primary process.

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
8e49376400 net/mlx4: add external allocator for Verbs object
To support secondary process, the memory allocated by library such as
completion rings (CQ) and buffer rings (WQ) must be manageable by EAL,
in order to share it with secondary processes. With new changes in
rdma-core and kernel driver, it is possible to provide an external
allocator to the library layer for this purpose. All such resources
will now be allocated within DPDK framework.

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
099c2c5376 net/mlx4: change device reference for secondary process
rte_eth_devices[] is not shared between primary and secondary process,
but a static array to each process. The reverse pointer of device
(priv->dev) becomes invalid if mlx4 supports secondary process.
Instead, priv has the pointer to shared data of the device,
  struct rte_eth_dev_data *dev_data;

Two macros are added,
  #define PORT_ID(priv) ((priv)->dev_data->port_id)
  #define ETH_DEV(priv) (&rte_eth_devices[PORT_ID(priv)])

Cc: stable@dpdk.org

Suggested-by: Raslan Darawsheh <rasland@mellanox.com>
Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
2aac5b5d11 net/mlx5: sync stop/start with secondary process
Rx/Tx burst function pointers are stored in the rte_eth_dev structure,
which is local to a process. Even though primary process replaces the
function pointers, secondary will not run the new ones. With rte_mp
APIs, primary can easily broadcast a request to stop/start the datapath
of secondary processes.

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
7be600c8d8 net/mlx5: rework PMD global data init
There's more need to have PMD global data structure. This should be
initialized once per a process regardless of how many PMD instances are
probed. mlx5_init_once() is called during probing and make sure all the
init functions are called once per a process. Currently, such global
data and its initialization functions are even scattered. Rather than
'extern'-ing such variables and calling such functions one by one making
sure it is called only once by checking the validity of such variables, it
will be better to have a global storage to hold such data and a
consolidated function having all the initializations. The existing shared
memory gets more extensively used for this purpose. As there could be
multiple secondary processes, a static storage (local to process) is also
added.

As the reserved virtual address for UAR remap is a PMD global resource,
this doesn't need to be stored in the device priv structure, but in the
PMD global data.

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
9a8ab29b84 net/mlx5: replace IPC socket with EAL API
Socket API is used for IPC in order for secondary process to acquire
Verb command file descriptor. The FD is used to remap UAR address.
The multi-process APIs (rte_mp) in EAL are newly introduced.
mlx5_socket.c is replaced with mlx5_mp.c, which uses the new APIs.

As it is PMD global infrastructure, only one IPC channel is established.
All the IPC message types may have port_id in the message if there is
need to reference a specific device.

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
3ebe658059 net/mlx5: fix memory event on secondary process
As the memory event is propagated to secondary processes, the event is
processed redundantly. This should be processed once because the data
structure used for MR and the event is global across the processes.

Fixes: 974f1e7ef146 ("net/mlx5: add new memory region support")
Cc: stable@dpdk.org

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Dekel Peled
de90612f40 net/mlx5: fix errno typos in comments
Correct typing mistake in several locations:
ernno ==> errno

Fixes: 23c1d42c7138 ("net/mlx5: split flow validation to dedicated function")
Cc: stable@dpdk.org

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Yongseok Koh
9c55c6bd86 net/mlx5: revert mbuf address calculation for x86
When replenishing mbufs on Rx, buffer address (mbuf->buf_addr) should be
loaded. non-x86 processors (mostly RISC such as ARM and Power) are more
vulnerable to load stall. For x86, reducing the number of instructions
seems to matter most.

For x86, this is simply a load but for other architectures, it is
calculated from the address of mbuf structure by rte_mbuf_buf_addr()
without having to load the first cacheline of the mbuf.

Fixes: 12d468a62bc1 ("net/mlx5: fix instruction hotspot on replenishing Rx buffer")
Cc: stable@dpdk.org

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
2019-04-05 17:45:22 +02:00
Hemant Agrawal
ccdb58c630 raw/dpaa2_qdma: support non prefetch mode
This patch add support for non prefetch mode in Rx functions.

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
2019-04-05 10:40:56 +02:00
Nipun Gupta
345c783b2d raw/dpaa2: remove logs from datapath
The runtime traces shall not be present in datapath

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
2019-04-05 10:40:56 +02:00
Hemant Agrawal
4d9a3f2a01 raw/dpaa2_qdma: support RBP mode
Add support for route by port mode. The route by port
feature in HW helps in translating the PCI address
of connected device.

Signed-off-by: Minghuan Lian <minghuan.lian@nxp.com>
Signed-off-by: Sachin Saxena <sachin.saxena@nxp.com>
Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
2019-04-05 10:40:43 +02:00
Hemant Agrawal
44889767af raw/dpaa2_qdma: support burst mode
This patch adds support the batch processing for the qdma jobs

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Signed-off-by: Yi Liu <yi.liu@nxp.com>
2019-04-05 01:05:56 +02:00
Shreyansh Jain
428fe6d4cb raw/dpaa2_qdma: fix to support multiprocess execution
Fixes: c22fab9a6c34 ("raw/dpaa2_qdma: support configuration APIs")
Cc: stable@dpdk.org

Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
2019-04-05 01:05:25 +02:00
Hemant Agrawal
fb1a20331d raw/dpaa2_qdma: remove experimental tag from APIs
These APIs has been in the DPDK for few release now.
This patch removes the experimental tags for the APIs.

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
2019-04-05 01:04:31 +02:00
Shreyansh Jain
55984a9bb5 net/dpaa2: update MC firmware version for FSLMC bus
MC firmware is the core component of FSLMC bus and DPAA2 devices.
Prior to this patch, MC firmware supported 10.10.x version. This
patch bumps the min supported version to 10.14.x.

Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
2019-04-04 23:42:15 +02:00
Shreyansh Jain
4eeb036c95 bus/fslmc: cleanup unused firmware code
Removes some unused firmware code which was added in last bump
of the firmware version. No current features uses these APIs.

Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
2019-04-04 23:42:15 +02:00
Bruce Richardson
6723c0fc72 replace snprintf with strlcpy
Do a global replace of snprintf(..."%s",...) with strlcpy, adding in the
rte_string_fns.h header if needed.  The function changes in this patch were
auto-generated via command:

  spatch --sp-file devtools/cocci/strlcpy.cocci --dir . --in-place

and then the files edited using awk to add in the missing header:

  gawk -i inplace '/include <rte_/ && ! seen { \
  	print "#include <rte_string_fns.h>"; seen=1} {print}'

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
2019-04-04 22:46:05 +02:00
Bruce Richardson
f9acaf84e9 replace snprintf with strlcpy without adding extra include
For files that already have rte_string_fns.h included in them, we can
do a straight replacement of snprintf(..."%s",...) with strlcpy. The
changes in this patch were auto-generated via command:

spatch --sp-file devtools/cocci/strlcpy-with-header.cocci --dir . --in-place

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
2019-04-04 22:45:54 +02:00
Bruce Richardson
f4206d1642 net/bonding: fix buffer length when printing strings
Using the size of the source string is incorrect when printing using
snprintf. Instead pass in the buffer size to be used appropriately.

Fixes: 457ecf2953fc ("bond: add debug info for mode 6")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
2019-04-04 22:41:11 +02:00
David Marchand
27893e4eee drivers: remove Linux EAL from include path
None of those drivers require EAL linux specific headers.

Signed-off-by: David Marchand <david.marchand@redhat.com>
2019-04-04 22:06:16 +02:00
Gage Eads
e75bc77f98 mempool/stack: add lock-free stack mempool handler
This commit adds support for lock-free (linked list based) stack mempool
handler.

In mempool_perf_autotest the lock-based stack outperforms the
lock-free handler for certain lcore/alloc count/free count
combinations*, however:
- For applications with preemptible pthreads, a standard (lock-based)
  stack's worst-case performance (i.e. one thread being preempted while
  holding the spinlock) is much worse than the lock-free stack's.
- Using per-thread mempool caches will largely mitigate the performance
  difference.

*Test setup: x86_64 build with default config, dual-socket Xeon E5-2699 v4,
running on isolcpus cores with a tickless scheduler. The lock-based stack's
rate_persec was 0.6x-3.5x the lock-free stack's.

Signed-off-by: Gage Eads <gage.eads@intel.com>
Reviewed-by: Olivier Matz <olivier.matz@6wind.com>
2019-04-04 22:06:16 +02:00
Gage Eads
734bdeb01c mempool/stack: use stack library
The new rte_stack library is derived from the mempool handler, so this
commit removes duplicated code and simplifies the handler by migrating it
to this new API.

Signed-off-by: Gage Eads <gage.eads@intel.com>
Reviewed-by: Olivier Matz <olivier.matz@6wind.com>
2019-04-04 22:06:16 +02:00
Tomasz Cel
bbbc39b2c2 compress/isal: fix getting information about CPU
This patch adds query about CPU features

Fixes: 53a9baa98c36 ("compress/isal: add basic PMD ops")
Cc: stable@dpdk.org

Signed-off-by: Tomasz Cel <tomaszx.cel@intel.com>
Acked-by: Lee Daly <lee.daly@intel.com>
2019-04-02 16:50:24 +02:00
Tomasz Jozwiak
1e796b11fe drivers/qat: fix queue pair NUMA node
This patch assigns QAT queue pair resources to the correct NUMA nodes.
Any DMA'able memory should use NUMA node of QAT device
rather than socket_id of the initializing process.

Fixes: 98c4a35c736f ("crypto/qat: move common qat files to common dir")
Fixes: a795248d740b ("compress/qat: add configure and clear functions")
Cc: stable@dpdk.org

Signed-off-by: Tomasz Jozwiak <tomaszx.jozwiak@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
2019-04-02 16:50:24 +02:00
Lee Daly
1aeb9fdb2e compress/isal: add appropriate flag on overflow
This patch will change the operation status when ISA-L returns because
of a recoverable out of space error, rather than a just generic fail.

Signed-off-by: Lee Daly <lee.daly@intel.com>
Tested-by: Tomasz Cel <tomaszx.cel@intel.com>
2019-04-02 16:50:24 +02:00
Ayuj Verma
378e08eba8 crypto/openssl: set RSA private op feature flag
openssl PMD support RSA private key operation
using both qt and exp key type.
Set rsa key type feature flag

Signed-off-by: Ayuj Verma <ayverma@marvell.com>
Signed-off-by: Shally Verma <shallyv@marvell.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>
2019-04-02 16:50:24 +02:00
Akhil Goyal
3b4757fc74 crypto/dpaa2_sec: support multi-process
- fle pool allocations should be done for each process.
- cryptodev->data is shared across muliple processes but
cryptodev itself is allocated for each process. So any
information which needs to be shared between processes,
should be kept in cryptodev->data.

Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
2019-04-02 16:50:24 +02:00
Akhil Goyal
e621d97000 crypto/dpaa_sec: fix session queue attach/detach
session inq and qp are assigned for each core from which the
packets arrive. This was not correctly handled while supporting
multiple sessions per queue pair.
This patch fixes the attach and detach of queues for each core.

Fixes: e79416d10fa3 ("crypto/dpaa_sec: support multiple sessions per queue pair")
Cc: stable@dpdk.org

Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
2019-04-02 16:50:24 +02:00
Akhil Goyal
07a5efda06 crypto/dpaa2_sec: remove unnecessary flc configurations
The removed fields are required in case the SEC block
allocates the buffer from bman pool.

Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
2019-04-02 16:50:24 +02:00
Akhil Goyal
7449390bb8 drivers/crypto: update inline desc for sharing mode
SEC HW descriptor sharing mode can now be controlled
during Session preparation by the respective drivers

shared descriptors in case of non-protocol offload does not need
any sync between the subsequent jobs. Thus, changing it to
SHR_NEVER from SHR_SERIAL for cipher_only, auth_only, and gcm.

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
2019-04-02 16:50:24 +02:00
Akhil Goyal
a5e05ab643 crypto/dpaa2_sec: fix offset calculation for GCM
In case of gcm, output buffer should have aad space
before the actual buffer which needs to be written.
CAAM will not write into the aad anything, it will skip
auth_only_len (aad) and write the buffer afterwards.

Fixes: 37f96eb01bce ("crypto/dpaa2_sec: support scatter gather")
Cc: stable@dpdk.org

Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
2019-04-02 16:50:24 +02:00
Akhil Goyal
fd4f22fbd8 crypto/dpaa2_sec: fix session clearing
private data should be cleared instead of the complete session

Fixes: 8d1f3a5d751b ("crypto/dpaa2_sec: support crypto operation")
Cc: stable@dpdk.org

Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
2019-04-02 16:50:24 +02:00
Tomasz Jozwiak
352332744c compress/qat: add dynamic SGL allocation
This patch adds dynamic SGL allocation instead of static one.
The number of element in SGL can be adjusted in each operation
depend of the request.

Signed-off-by: Tomasz Jozwiak <tomaszx.jozwiak@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
2019-04-02 16:50:24 +02:00
Fan Zhang
7b2d4706c9 crypto/aesni_mb: support newer library version only
As stated in 19.02 deprecation notice, this patch updates the
aesni_mb PMD to remove the support of older Intel-ipsec-mb
library version earlier than 0.52.

Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
2019-04-02 16:50:24 +02:00
Fan Zhang
2d0c29a37a crypto/aesni_mb: enable out of place processing
Add out-of-place processing, i.e. different source and
destination m_bufs, plus related capability update, tests
and documentation.

Signed-off-by: Fiona Trahe <fiona.trahe@intel.com>
Signed-off-by: Paul Luse <paul.e.luse@intel.com>
Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
2019-04-02 16:50:24 +02:00
Arek Kusztal
8245972c04 crypto/qat: add modular multiplicative inverse
This commit adds modular multiplicative inverse to Intel
QuickAssist Technology driver. For capabilities or limitations
please refer to qat.rst or qat_asym_capabilities.h.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
2019-04-02 16:50:24 +02:00
Arek Kusztal
fb70b33b05 crypto/qat: add modular exponentiation
This commit adds modular exponentiation to Intel QuickAssist
Technology driver. For capabilities or limitations please refer to
qat.rst or qat_asym_capabilities.h.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
2019-04-02 16:50:24 +02:00
Arek Kusztal
f81cbc208f crypto/qat: add asymmetric crypto PMD
This patch adds Poll Mode Driver for asymmetric crypto
functions of Intel QuickAssist Technology hardware.

It contains plain driver with no functions implemented, specific
algorithms will be introduced in separate patches.

This patch depends on a QAT PF driver for device initialization. See
the file docs/guides/cryptodevs/qat.rst for configuration details.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
2019-04-02 16:50:24 +02:00
Arek Kusztal
0adc033f58 common/qat: add headers for asymmetric crypto
This commit adds headers to be used in conjunction with asymmetric
cryptography operations using Intel QuickAssist Technology driver

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
2019-04-02 16:50:24 +02:00
Tomasz Cel
ae1374e240 compress/isal: fix compression stream initialization
This patch fixes ISAL internal state fields initialization.

Fixes: dc49e6aa4879 ("compress/isal: add ISA-L compression functionality")
Cc: stable@dpdk.org

Signed-off-by: Tomasz Cel <tomaszx.cel@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
2019-04-02 16:50:24 +02:00
Harry van Haaren
1b03e29291 event/sw: fix enqueue checks in self-test
This patch fixes a number of instances of the same return
value mis-check, where previously we checked for a negative
return value as error, however the API returns an unsigned
integer, so these return value checks are invalid.

The rte_event_enqueue_burst() API returns the number of
events enqueued, so in order to identify the error case,
we must check for != the number of intended enqueues.

Fixes: cd1a9e3eab55 ("test/eventdev: add SW tests for load balancing")
Cc: stable@dpdk.org

Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
2019-04-02 03:10:47 +02:00
Anand Rawat
fa647c5722 build: add workarounds for Windows helloworld
Added meson workarounds to build helloworld on Windows.
Windows currently only supports kvargs and eal libraries.
This change restricts the build flow to supported libraries
only.

Signed-off-by: Anand Rawat <anand.rawat@intel.com>
Signed-off-by: Pallavi Kadam <pallavi.kadam@intel.com>
Reviewed-by: Jeff Shaw <jeffrey.b.shaw@intel.com>
Reviewed-by: Ranjit Menon <ranjit.menon@intel.com>
Acked-by: Harini Ramakrishnan <harini.ramakrishnan@microsoft.com>
2019-04-03 01:21:31 +02:00
Nemanja Marjanovic
d08b6845e4 net/softnic: support QinQ PPPoE encapsulation
Add implementation of QinQ PPPoE packet encapsulation action.

Signed-off-by: Nemanja Marjanovic <nemanja.marjanovic@intel.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
2019-03-29 20:54:36 +01:00
Ian Stokes
ae35fd61fc net/e1000: set min and max MTU
This commit sets the min and max supported MTU values for igb devices
via the eth_igb_info_get() function. Min MTU supported is set to
ETHER_MIN_MTU and max MTU is calculated as the max packet length
supported minus the transport overhead. To aid in these calculations
a new MACRO 'E1000_ETH_OVERHEAD' has been introduced to consolidate
overhead calculation and avoid duplication.

Signed-off-by: Ian Stokes <ian.stokes@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
2019-03-29 19:00:35 +01:00