diff options
| author |   Yonatan Cohen <yonatanc@mellanox.com> | 2017-11-13 10:51:16 +0200 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2017-11-13 16:59:22 -0500 |
| commit | 18bd90729237dc6ddbad01bc9618148224f03590 (patch) | |
| tree | f3c00ca494484a90d359c971bdfeeca826ee231f /drivers/infiniband/core/uverbs_cmd.c | |
| parent | IB/mlx5: Exposing modify CQ callback to uverbs layer (diff) | |
| download | linux-dev-18bd90729237dc6ddbad01bc9618148224f03590.tar.xz linux-dev-18bd90729237dc6ddbad01bc9618148224f03590.zip | |
IB/uverbs: Add CQ moderation capability to query_device
The query_device function can now obtain the maximum values for
cq_max_count and cq_period, needed for CQ moderation.
cq_max_count is a 16 bits number that determines the number
of CQEs to accumulate before generating an event.
cq_period is a 16 bits number that determines the timeout in micro
seconds from the last event generated, upon which a new event will
be generated even if cq_max_count was not reached.
Signed-off-by: Yonatan Cohen <yonatanc@mellanox.com>
Reviewed-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/core/uverbs_cmd.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 3c2673cd4090..53143e4b1c50 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -3852,6 +3852,15 @@ int ib_uverbs_ex_query_device(struct ib_uverbs_file *file, resp.tm_caps.max_sge = attr.tm_caps.max_sge; resp.tm_caps.flags = attr.tm_caps.flags; resp.response_length += sizeof(resp.tm_caps); + + if (ucore->outlen < resp.response_length + sizeof(resp.cq_moderation_caps)) + goto end; + + resp.cq_moderation_caps.max_cq_moderation_count = + attr.cq_caps.max_cq_moderation_count; + resp.cq_moderation_caps.max_cq_moderation_period = + attr.cq_caps.max_cq_moderation_period; + resp.response_length += sizeof(resp.cq_moderation_caps); end: err = ib_copy_to_udata(ucore, &resp, resp.response_length); return err; |