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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>
This commit is contained in:
Yonatan Cohen 2017-11-13 10:51:16 +02:00 committed by Doug Ledford
parent b0e9df6da2
commit 18bd907292
3 changed files with 22 additions and 0 deletions
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9
drivers/infiniband/core/uverbs_cmd.c
View File

@ -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;

6
include/rdma/ib_verbs.h
View File

@ -315,6 +315,11 @@ enum ib_cq_attr_mask {
IB_CQ_MODERATE = 1 << 0,
};
struct ib_cq_caps {
u16 max_cq_moderation_count;
u16 max_cq_moderation_period;
};
struct ib_device_attr {
u64 fw_ver;
__be64 sys_image_guid;
@ -365,6 +370,7 @@ struct ib_device_attr {
u32 max_wq_type_rq;
u32 raw_packet_caps; /* Use ib_raw_packet_caps enum */
struct ib_tm_caps tm_caps;
struct ib_cq_caps cq_caps;
};
enum ib_mtu {

7
include/uapi/rdma/ib_user_verbs.h
View File

@ -125,6 +125,12 @@ struct ib_uverbs_comp_event_desc {
__u64 cq_handle;
};
struct ib_uverbs_cq_moderation_caps {
__u16 max_cq_moderation_count;
__u16 max_cq_moderation_period;
__u32 reserved;
};
/*
* All commands from userspace should start with a __u32 command field
* followed by __u16 in_words and out_words fields (which give the
@ -263,6 +269,7 @@ struct ib_uverbs_ex_query_device_resp {
__u32 max_wq_type_rq;
__u32 raw_packet_caps;
struct ib_uverbs_tm_caps tm_caps;
struct ib_uverbs_cq_moderation_caps cq_moderation_caps;
};
struct ib_uverbs_query_port {