c414455701
Depending on HW revision readless communcation between host and device may be unavailable. In that case prevent PMD from setting up readless communication mechanism. "readless" refers to ability to read ENA registers without actually issuing read request from host (x86). Instead, host programs 2 registers on the device that triggers a DMA from device to host and reports a register value. However, this functionality is not going to be available in all types of devices. The decision if this mode is supported or not, is taken from revision_id in pci configuration space. Signed-off-by: Alexander Matushevsky <matua@amazon.com> Signed-off-by: Jakub Palider <jpa@semihalf.com> Signed-off-by: Jan Medala <jan@semihalf.com> |
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