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authorYonatan Cohen <yonatanc@mellanox.com>2017-11-13 11:51:16 +0300
committerDoug Ledford <dledford@redhat.com>2017-11-14 00:59:22 +0300
commit18bd90729237dc6ddbad01bc9618148224f03590 (patch)
treef3c00ca494484a90d359c971bdfeeca826ee231f /drivers/infiniband
parentb0e9df6da25890448ebd134b7f647f16bced9abc (diff)
downloadlinux-18bd90729237dc6ddbad01bc9618148224f03590.tar.xz
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')
-rw-r--r--drivers/infiniband/core/uverbs_cmd.c9
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;