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MFC 1c808fcd859f: Allocate BAR for ENA MSIx vector table

Description

MFC 1c808fcd859f: Allocate BAR for ENA MSIx vector table

In the new ENA-based instances like c6gn, the vector table moved to a
new PCIe bar - BAR1. Previously it was always located on the BAR0, so
the resources were already allocated together with the registers.

As the FreeBSD isn't doing any resource allocation behind the scenes,
the driver is responsible to allocate them explicitly, before other
parts of the OS (like the PCI code allocating MSIx) will be able to
access them.

To determine dynamically BAR on which the MSIx vector table is present
the pci_msix_table_bar() is being used and the new BAR is allocated if
needed.

Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc

(cherry picked from commit 1c808fcd859f5ce24132a903a4c7c9996e0513b1)

Details

Provenance
mk_semihalf.comAuthored on Feb 18 2021, 9:00 AM
mwCommitted on Feb 22 2021, 3:59 PM
Parents
rG4aa71da8dc00: bc: Upgrade to version 3.3.0
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