On Sun, Oct 03, 2021 at 01:56:04PM +0300, Gal Pressman wrote: > This patch adds support for CQ notifications through the standard verbs > api. > > In order to achieve that, a new event queue (EQ) object is introduced, > which is in charge of reporting completion events to the driver. > On driver load, EQs are allocated and their affinity is set to a single > cpu. When a user app creates a CQ with a completion channel, the > completion vector number is converted to a EQ number, which is in charge > of reporting the CQ events. > > In addition, the CQ creation admin command now returns an offset for the > CQ doorbell, which is mapped to the userspace provider and is used to > arm the CQ when requested by the user. > > The EQs use a single doorbell (located on the registers BAR), which > encodes the EQ number and arm as part of the doorbell value. > The EQs are polled by the driver on each new EQE, and arm it when the > poll is completed. > > Reviewed-by: Firas JahJah <firasj@xxxxxxxxxx> > Reviewed-by: Yossi Leybovich <sleybo@xxxxxxxxxx> > Signed-off-by: Gal Pressman <galpress@xxxxxxxxxx> > --- > PR was sent: > https://github.com/linux-rdma/rdma-core/pull/1044 > > Changelog - > v3->v4: https://lore.kernel.org/linux-rdma/20210930121602.63131-1-galpress@xxxxxxxxxx/ > * Change destroy EQ functions' return value to void > > v2->v3: https://lore.kernel.org/linux-rdma/20210913120406.61745-1-galpress@xxxxxxxxxx/ > * Only store CQs with interrupts enabled in the CQs xarray > * Add a comment before the xa_load to explain why it is safe > > v1->v2: https://lore.kernel.org/linux-rdma/20210811151131.39138-1-galpress@xxxxxxxxxx/ > * Replace xa_init_flags() with xa_init() > * Add a synchronize_irq() in destroy_cq flow to prevent a race with > interrupt flow. > --- > drivers/infiniband/hw/efa/efa.h | 19 +- > .../infiniband/hw/efa/efa_admin_cmds_defs.h | 100 +++++++++- > drivers/infiniband/hw/efa/efa_admin_defs.h | 41 ++++ > drivers/infiniband/hw/efa/efa_com.c | 164 ++++++++++++++++ > drivers/infiniband/hw/efa/efa_com.h | 38 +++- > drivers/infiniband/hw/efa/efa_com_cmd.c | 35 +++- > drivers/infiniband/hw/efa/efa_com_cmd.h | 10 +- > drivers/infiniband/hw/efa/efa_main.c | 181 +++++++++++++++--- > drivers/infiniband/hw/efa/efa_regs_defs.h | 7 +- > drivers/infiniband/hw/efa/efa_verbs.c | 67 ++++++- > include/uapi/rdma/efa-abi.h | 18 +- > 11 files changed, 625 insertions(+), 55 deletions(-) Applied to for-next, thanks Jason
