Commit 18bd9072 authored by Yonatan Cohen's avatar Yonatan Cohen Committed by Doug Ledford
Browse files

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: default avatarYonatan Cohen <yonatanc@mellanox.com>
Reviewed-by: default avatarMajd Dibbiny <majd@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent b0e9df6d

drivers/infiniband/core/uverbs_cmd.c

+9 −0
Original line number Diff line number Diff line
@@ -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;

include/rdma/ib_verbs.h

+6 −0
Original line number Diff line number Diff line
@@ -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 {

include/uapi/rdma/ib_user_verbs.h

+7 −0
Original line number Diff line number Diff line
@@ -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 {

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