On Tue, Jul 18, 2023 at 10:02:50PM -0700, Selvin Xavier wrote: > The idea behind this series is to prevent Doorbell drops > on some of the Broadcom adapters that require Doorbell > moderation. This is achieved by pacing the doorbell writes > into the hardware FIFO. The rate at which individual doorbells > are written needs to be dynamically adjusted, because > it depends on the ability of the hardware to drain the > FIFO and on the number and behavior of individual > doorbell writers. When congestion is detected by the user > library, it notifies the driver and driver adjust the > pacing parameters dynamically in a shared page, which will > be used for pacing the Doorbells. > > Currently this feature is targeted only for user applications. > The corresponding user lib patch is in the pull request. > https://github.com/linux-rdma/rdma-core/pull/1360 > > Thanks, > Selvin Xavier > > v2 -> v3: > Fix the build warning > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > v1 -> v2: > Rebased the patches on top of the latest for-next branch > > Chandramohan Akula (7): > bnxt_en: Update HW interface headers > bnxt_en: Share the bar0 address with the RoCE driver > RDMA/bnxt_re: Initialize Doorbell pacing feature > RDMA/bnxt_re: Enable pacing support for the user apps > RDMA/bnxt_re: Update alloc_page uapi for pacing > RDMA/bnxt_re: Implement doorbell pacing algorithm > RDMA/bnxt_re: Add a new uapi for driver notification Applied to for-next, thanks Jason
