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Commit 7e952b19 authored by Shiraz Saleem's avatar Shiraz Saleem Committed by Jason Gunthorpe
Browse files

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 c66cd353 ("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: default avatarShiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 7de8b357

drivers/infiniband/hw/i40iw/i40iw_verbs.c

+20 −0
Original line number Diff line number Diff line
@@ -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;

}