Changes in sfc_flow_rss.c

68cde2a3 - net/sfc: use even spread mode in flow action RSS

Tue, 01 Feb 2022 08:50:02 +0000

net/sfc: use even spread mode in flow action RSSIf the user provides contiguous ascending queue IDs,use the even spread mode to avoid wasting resourceswhich are needed to serve indirection table entries.Signed-off-by: Ivan Malov Reviewed-by: Andrew Rybchenko Reviewed-by: Andy Moreton List of files: /dpdk/drivers/net/sfc/sfc_flow_rss.c

be5cbe47 - net/sfc: use adaptive table entry count in flow action RSS

Tue, 01 Feb 2022 08:50:00 +0000

net/sfc: use adaptive table entry count in flow action RSSCurrently, every RSS context uses 128 indirection entries inthe hardware. That is not always optimal because the entriescome from a pool shared among all PCI functions of the board,while the format of action RSS allows to pass less queue IDs.With EF100 boards, it is possible to decide how many entriesto allocate for the indirection table of a context. Make useof that in order to optimise resource usage in RSS scenarios.Signed-off-by: Ivan Malov Reviewed-by: Andrew Rybchenko Reviewed-by: Andy Moreton List of files: /dpdk/drivers/net/sfc/sfc_flow_rss.c

f6d23053 - net/sfc: use non-static queue span limit in flow action RSS

Tue, 01 Feb 2022 08:49:57 +0000

net/sfc: use non-static queue span limit in flow action RSSOn EF10 boards, the limit on how many queues an RSS contextcan address is 64. On EF100 boards, this parameter may vary.Signed-off-by: Ivan Malov Reviewed-by: Andrew Rybchenko Reviewed-by: Andy Moreton List of files: /dpdk/drivers/net/sfc/sfc_flow_rss.c

6da67e70 - net/sfc: rework flow action RSS support

Tue, 01 Feb 2022 08:49:55 +0000

net/sfc: rework flow action RSS supportCurrently, the driver always allocates a dedicated NIC RSS contextfor every separate flow rule with action RSS, which is not optimal.First of all, multiple rules which have the same RSS specificationcan share a context since filters in the hardware operate this way.Secondly, entries in a context's indirection table are not precisequeue IDs but offsets with regard to the base queue ID of a filter.This way, for example, queue arrays "0, 1, 2" and "3, 4, 5" in twootherwise identical RSS specifications allow the driver to use thesame context since they both yield the same table of queue offsets.Rework flow action RSS support in order to use these optimisations.Signed-off-by: Ivan Malov Reviewed-by: Andrew Rybchenko Reviewed-by: Andy Moreton List of files: /dpdk/drivers/net/sfc/sfc_flow_rss.c