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Diffstat (limited to 'doc/guides/nics/intel_vf.rst')
| -rw-r--r-- | doc/guides/nics/intel_vf.rst | 87 |
1 files changed, 44 insertions, 43 deletions
diff --git a/doc/guides/nics/intel_vf.rst b/doc/guides/nics/intel_vf.rst index 9fe42093..1e83bf6e 100644 --- a/doc/guides/nics/intel_vf.rst +++ b/doc/guides/nics/intel_vf.rst @@ -124,12 +124,12 @@ However: The above is an important consideration to take into account when targeting specific packets to a selected port. -Intel® Fortville 10/40 Gigabit Ethernet Controller VF Infrastructure -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Intel® X710/XL710 Gigabit Ethernet Controller VF Infrastructure +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ In a virtualized environment, the programmer can enable a maximum of *128 Virtual Functions (VF)* -globally per Intel® Fortville 10/40 Gigabit Ethernet Controller NIC device. -Each VF can have a maximum of 16 queue pairs. +globally per Intel® X710/XL710 Gigabit Ethernet Controller NIC device. +The number of queue pairs of each VF can be configured by ``CONFIG_RTE_LIBRTE_I40E_QUEUE_NUM_PER_VF`` in ``config`` file. The Physical Function in host could be either configured by the Linux* i40e driver (in the case of the Linux Kernel-based Virtual Machine [KVM]) or by DPDK PMD PF driver. When using both DPDK PMD PF/VF drivers, the whole NIC will be taken over by DPDK based application. @@ -156,44 +156,6 @@ For example, Launch the DPDK testpmd/example or your own host daemon application using the DPDK PMD library. -* Using the DPDK PMD PF ixgbe driver to enable VF RSS: - - Same steps as above to install the modules of uio, igb_uio, specify max_vfs for PCI device, and - launch the DPDK testpmd/example or your own host daemon application using the DPDK PMD library. - - The available queue number(at most 4) per VF depends on the total number of pool, which is - determined by the max number of VF at PF initialization stage and the number of queue specified - in config: - - * If the max number of VF is set in the range of 1 to 32: - - If the number of rxq is specified as 4(e.g. '--rxq 4' in testpmd), then there are totally 32 - pools(ETH_32_POOLS), and each VF could have 4 or less(e.g. 2) queues; - - If the number of rxq is specified as 2(e.g. '--rxq 2' in testpmd), then there are totally 32 - pools(ETH_32_POOLS), and each VF could have 2 queues; - - * If the max number of VF is in the range of 33 to 64: - - If the number of rxq is 4 ('--rxq 4' in testpmd), then error message is expected as rxq is not - correct at this case; - - If the number of rxq is 2 ('--rxq 2' in testpmd), then there is totally 64 pools(ETH_64_POOLS), - and each VF have 2 queues; - - On host, to enable VF RSS functionality, rx mq mode should be set as ETH_MQ_RX_VMDQ_RSS - or ETH_MQ_RX_RSS mode, and SRIOV mode should be activated(max_vfs >= 1). - It also needs config VF RSS information like hash function, RSS key, RSS key length. - - .. code-block:: console - - testpmd -c 0xffff -n 4 -- --coremask=<core-mask> --rxq=4 --txq=4 -i - - The limitation for VF RSS on Intel® 82599 10 Gigabit Ethernet Controller is: - The hash and key are shared among PF and all VF, the RETA table with 128 entries is also shared - among PF and all VF; So it could not to provide a method to query the hash and reta content per - VF on guest, while, if possible, please query them on host(PF) for the shared RETA information. - Virtual Function enumeration is performed in the following sequence by the Linux* pci driver for a dual-port NIC. When you enable the four Virtual Functions with the above command, the four enabled functions have a Function# represented by (Bus#, Device#, Function#) in sequence starting from 0 to 3. @@ -207,6 +169,9 @@ However: The above is an important consideration to take into account when targeting specific packets to a selected port. + For Intel® X710/XL710 Gigabit Ethernet Controller, queues are in pairs. One queue pair means one receive queue and + one transmit queue. The default number of queue pairs per VF is 4, and can be 16 in maximum. + Intel® 82599 10 Gigabit Ethernet Controller VF Infrastructure ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -241,6 +206,42 @@ For example, Launch the DPDK testpmd/example or your own host daemon application using the DPDK PMD library. +* Using the DPDK PMD PF ixgbe driver to enable VF RSS: + + Same steps as above to install the modules of uio, igb_uio, specify max_vfs for PCI device, and + launch the DPDK testpmd/example or your own host daemon application using the DPDK PMD library. + + The available queue number (at most 4) per VF depends on the total number of pool, which is + determined by the max number of VF at PF initialization stage and the number of queue specified + in config: + + * If the max number of VFs (max_vfs) is set in the range of 1 to 32: + + If the number of Rx queues is specified as 4 (``--rxq=4`` in testpmd), then there are totally 32 + pools (ETH_32_POOLS), and each VF could have 4 Rx queues; + + If the number of Rx queues is specified as 2 (``--rxq=2`` in testpmd), then there are totally 32 + pools (ETH_32_POOLS), and each VF could have 2 Rx queues; + + * If the max number of VFs (max_vfs) is in the range of 33 to 64: + + If the number of Rx queues in specified as 4 (``--rxq=4`` in testpmd), then error message is expected + as ``rxq`` is not correct at this case; + + If the number of rxq is 2 (``--rxq=2`` in testpmd), then there is totally 64 pools (ETH_64_POOLS), + and each VF have 2 Rx queues; + + On host, to enable VF RSS functionality, rx mq mode should be set as ETH_MQ_RX_VMDQ_RSS + or ETH_MQ_RX_RSS mode, and SRIOV mode should be activated (max_vfs >= 1). + It also needs config VF RSS information like hash function, RSS key, RSS key length. + +.. note:: + + The limitation for VF RSS on Intel® 82599 10 Gigabit Ethernet Controller is: + The hash and key are shared among PF and all VF, the RETA table with 128 entries is also shared + among PF and all VF; So it could not to provide a method to query the hash and reta content per + VF on guest, while, if possible, please query them on host for the shared RETA information. + Virtual Function enumeration is performed in the following sequence by the Linux* pci driver for a dual-port NIC. When you enable the four Virtual Functions with the above command, the four enabled functions have a Function# represented by (Bus#, Device#, Function#) in sequence starting from 0 to 3. @@ -513,7 +514,7 @@ The setup procedure is as follows: .. code-block:: console make install T=x86_64-native-linuxapp-gcc - ./x86_64-native-linuxapp-gcc/app/testpmd -c f -n 4 -- -i + ./x86_64-native-linuxapp-gcc/app/testpmd -l 0-3 -n 4 -- -i #. Finally, access the Guest OS using vncviewer with the localhost:5900 port and check the lspci command output in the Guest OS. The virtual functions will be listed as available for use. |