On Thu, Oct 07, 2021 at 03:40:46PM -0500, Bob Pearson wrote: > Currently the rdma_rxe driver and its user space provider exchange > addressing information for UD sends by having the provider compute an > address vector (AV) and send it with each WQE. This is not the way > that the RDMA verbs API was intended to operate. > > This series of patches modifies the way UD send WQEs work by exchanging > an index identifying the AH replacing the 88 byte AV by a 4 byte AH > index. In order to not break compatibility with the existing API the > rdma_rxe driver will recognise when an older version of the provider > is not sending an index (i.e. it is 0) and will use the AV instead. > > This series of patches is rebased to > commit: 286dba65a4a65a6d5de011767061f6ffa6e10389 (for-next) > > v6: > Rebase to 5.15.0-rc4 > Reduced the max number of AH objects from 1M to 32K. > > v5: > Rebase to 5.15.0-rc2+ > > v4: > Rebase to 5.15.0-rc1+ > > v3: > Split up commits into smaller steps. > > v2: > Rearranged AV in rxe_send_wqe to be in the ud struct but padded to the > same offset as the original preserving ABI compatibility. > > Bob Pearson (6): > RDMA/rxe: Move AV from rxe_send_wqe to rxe_send_wr > RDMA/rxe: Change AH objects to indexed > RDMA/rxe: Create AH index and return to user space > RDMA/rxe: Replace ah->pd by ah->ibah.pd > RDMA/rxe: Lookup kernel AH from ah index in UD WQEs > RDMA/rxe: Convert kernel UD post send to use ah_num Applied to for-next, thanks Jason
