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| author | Sagi Grimberg <sagi@grimberg.me> | 2017-07-13 11:09:41 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-08-08 14:55:56 -0400 |
| commit | c66cd353bbe6869a059869a7a1518ec619afdc9d (patch) | |
| tree | f844baddad2b6a32100953f95378b4095011115b /include/rdma | |
| parent | a435393acafbf0ecff4deb3e3cb554b34f0d0664 (diff) | |
| download | linux-stable-c66cd353bbe6869a059869a7a1518ec619afdc9d.tar.gz linux-stable-c66cd353bbe6869a059869a7a1518ec619afdc9d.tar.bz2 linux-stable-c66cd353bbe6869a059869a7a1518ec619afdc9d.zip | |
RDMA/core: expose affinity mappings per completion vector
This will allow ULPs to intelligently locate threads based
on completion vector cpu affinity mappings. In case the
driver does not expose a get_vector_affinity callout, return
NULL so the caller can maintain a fallback logic.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma')
| -rw-r--r-- | include/rdma/ib_verbs.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index b5732432bb29..73ed2e4e802f 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2296,6 +2296,8 @@ struct ib_device { */ int (*get_port_immutable)(struct ib_device *, u8, struct ib_port_immutable *); void (*get_dev_fw_str)(struct ib_device *, char *str, size_t str_len); + const struct cpumask *(*get_vector_affinity)(struct ib_device *ibdev, + int comp_vector); }; struct ib_client { @@ -3706,4 +3708,26 @@ static inline enum rdma_ah_attr_type rdma_ah_find_type(struct ib_device *dev, else return RDMA_AH_ATTR_TYPE_IB; } + +/** + * ib_get_vector_affinity - Get the affinity mappings of a given completion + * vector + * @device: the rdma device + * @comp_vector: index of completion vector + * + * Returns NULL on failure, otherwise a corresponding cpu map of the + * completion vector (returns all-cpus map if the device driver doesn't + * implement get_vector_affinity). + */ +static inline const struct cpumask * +ib_get_vector_affinity(struct ib_device *device, int comp_vector) +{ + if (comp_vector < 0 || comp_vector >= device->num_comp_vectors || + !device->get_vector_affinity) + return NULL; + + return device->get_vector_affinity(device, comp_vector); + +} + #endif /* IB_VERBS_H */ |