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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 c66cd353bb ("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 <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Shiraz Saleem 2018-03-02 15:17:14 -06:00 committed by Jason Gunthorpe
parent 7de8b3576a
commit 7e952b19eb
1 changed files with 20 additions and 0 deletions
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20
drivers/infiniband/hw/i40iw/i40iw_verbs.c
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@ -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;
}