Kevin Bowling
fb8fcd4bff
Track whether iflib queue mappings may still be accessed by the device. Keep the state private to iflib and conservative: an unknown or failed device must pass through IFDI_STOP() before mappings are reused or released, while a device known to be stopped need not receive another hardware stop. Enter the starting state before IFDI_INIT(), publish running only after receive buffers and framework state are ready, and stop hardware if receive-buffer setup fails after driver initialization. Do not initialize an administratively-down interface merely because its MTU, capabilities, VLAN configuration, or media changed. Preserve successful retries for an administratively-up interface whose previous initialization failed. This state describes ownership of iflib datapath mappings only. It deliberately makes no claim about firmware queues, administrative DMA, PCI power state, or whether a driver can safely elide a hardware reset. Reviewed by: iflib (gallatin) MFC after: 2 weeks Sponsored by: BBOX.io Differential Revision: https://reviews.freebsd.org/D59328
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