Hans Petter Selasky 8f648a8a62 MFC r313555: ... Flexible and asymmetric allocation of EQs and MSI-X vectors for PF/VFs. Previously, the mlx4 driver queried the firmware in order to get the number of supported EQs. Under SRIOV, since this was done before the driver notified the firmware how many VFs it actually needs, the firmware had to take into account a worst case scenario and always allocated four EQs per VF, where one was used for events while the others were used for completions. Now, when the firmware supports the asymmetric allocation scheme, denoted by exposing num_sys_eqs > 0 (--> MLX4_DEV_CAP_FLAG2_SYS_EQS), we use the QUERY_FUNC command to query the firmware before enabling SRIOV. Thus we can get more EQs and MSI-X vectors per function. Moreover, when running in the new firmware/driver mode, the limitation that the number of EQs should be a power of two is lifted. Obtained from: Linux (dual BSD/GPLv2 licensed) Submitted by: Dexuan Cui @ microsoft . com Differential Revision: https://reviews.freebsd.org/D8867 Sponsored by: Mellanox Technologies		2017-05-19 12:53:50 +00:00
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drivers	MFC r313555:	2017-05-19 12:53:50 +00:00
include	MFC r313555:	2017-05-19 12:53:50 +00:00