doc: add ixgbe known issue with legacy interrrupt
authorXiaoyun Li <xiaoyun.li@intel.com>
Mon, 15 Oct 2018 04:36:34 +0000 (00:36 -0400)
committerFerruh Yigit <ferruh.yigit@intel.com>
Thu, 18 Oct 2018 08:24:39 +0000 (10:24 +0200)
commit621c5c1db2b1128d08cb10861b3d51217e1ea8bf
tree9e0425099ddfce475445d1f42a02d8e3ca4fea1b
parentf683a52006054b52824c3ba7f3d915adc9e0059c
doc: add ixgbe known issue with legacy interrrupt

When using uio_pci_generic module or using legacy interrupt mode of
igb_uio or vfio, X550 cannot get interrupts. Because the Interrupt
Status bit is not implemented, then the irq cannot be handled correctly
and cannot report the event fd to DPDK apps.

Add this hw limitation and details into ixgbe known issue.

Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
doc/guides/nics/ixgbe.rst