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Diffstat (limited to 'doc/guides/nics/i40e.rst')
| -rw-r--r-- | doc/guides/nics/i40e.rst | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/doc/guides/nics/i40e.rst b/doc/guides/nics/i40e.rst index 5780268f..556b55fe 100644 --- a/doc/guides/nics/i40e.rst +++ b/doc/guides/nics/i40e.rst @@ -130,6 +130,21 @@ Please note that enabling debugging options may affect system performance. Interrupt Throttling interval. +Runtime Config Options +~~~~~~~~~~~~~~~~~~~~~~ + +- ``Support multiple driver`` (default ``disable``) + + There was a multiple driver support issue during use of 700 series Ethernet + Adapter with both Linux kernel and DPDK PMD. To fix this issue, ``devargs`` + parameter ``support-multi-driver`` is introduced, for example:: + + -w 84:00.0,support-multi-driver=1 + + With the above configuration, DPDK PMD will not change global registers, and + will switch PF interrupt from IntN to Int0 to avoid interrupt conflict between + DPDK and Linux Kernel. + Driver Compilation ~~~~~~~~~~~~~~~~~~ @@ -459,3 +474,15 @@ Receive packets with Ethertype 0x88A8 Due to the FW limitation, PF can receive packets with Ethertype 0x88A8 only when floating VEB is disabled. + +Global configuration warning +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +I40E PMD will set some global registers to enable some function or set some +configure. Then when using different ports of the same NIC with Linux kernel +and DPDK, the port with Linux kernel will be impacted by the port with DPDK. +For example, register I40E_GL_SWT_L2TAGCTRL is used to control L2 tag, i40e +PMD uses I40E_GL_SWT_L2TAGCTRL to set vlan TPID. If setting TPID in port A +with DPDK, then the configuration will also impact port B in the NIC with +kernel driver, which don't want to use the TPID. +So PMD reports warning to clarify what is changed by writing global register. |