From 7e952b19eb638ffa2d511796e35c62a48ec1aef0 Mon Sep 17 00:00:00 2001 From: Shiraz Saleem Date: Fri, 2 Mar 2018 15:17:14 -0600 Subject: i40iw: Implement get_vector_affinity API Storage ULPs (like NVMEoF) benefit from exposing affinity mapping per completion vector to find the optimal multi-queue affinity assignments. The ULPs call the verbs API ib_get_vector_affinity introduced in commit c66cd353bbe ("RDMA/core: expose affinity mappings per completion vector") to get the underlying devices affinity mappings. Add support in driver to expose the affinity masks per MSI-X completion vector. Signed-off-by: Shiraz Saleem Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/i40iw/i40iw_verbs.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'drivers/infiniband/hw/i40iw/i40iw_verbs.c') diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c index 70024e8e2692..a51798578f27 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c +++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c @@ -2728,6 +2728,25 @@ static int i40iw_destroy_ah(struct ib_ah *ah) return -ENOSYS; } +/** + * i40iw_get_vector_affinity - report IRQ affinity mask + * @ibdev: IB device + * @comp_vector: completion vector index + */ +static const struct cpumask *i40iw_get_vector_affinity(struct ib_device *ibdev, + int comp_vector) +{ + struct i40iw_device *iwdev = to_iwdev(ibdev); + struct i40iw_msix_vector *msix_vec; + + if (iwdev->msix_shared) + msix_vec = &iwdev->iw_msixtbl[comp_vector]; + else + msix_vec = &iwdev->iw_msixtbl[comp_vector + 1]; + + return irq_get_affinity_mask(msix_vec->irq); +} + /** * i40iw_init_rdma_device - initialization of iwarp device * @iwdev: iwarp device @@ -2824,6 +2843,7 @@ static struct i40iw_ib_device *i40iw_init_rdma_device(struct i40iw_device *iwdev iwibdev->ibdev.req_notify_cq = i40iw_req_notify_cq; iwibdev->ibdev.post_send = i40iw_post_send; iwibdev->ibdev.post_recv = i40iw_post_recv; + iwibdev->ibdev.get_vector_affinity = i40iw_get_vector_affinity; return iwibdev; } -- cgit v1.2.3-59-g8ed1b