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Commit 24306dc6 authored by Matan Barak's avatar Matan Barak Committed by Doug Ledford
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IB/core: Add timestamp_mask and hca_core_clock to query_device 



In order to expose timestamp we need to expose two new attributes in
query_device to be used for CQ completion time-stamping:

timestamp_mask - how many bits are valid in the timestamp, where timestamp
values could be 64bits the most.

hca_core_clock - timestamp is given in HW cycles, the frequency in KHZ units
of the HCA, necessary in order to convert cycles to seconds.

This is added both to ib_query_device and its respective uverbs counterpart.

Signed-off-by: default avatarMatan Barak <matanb@mellanox.com>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 565197dd

drivers/infiniband/core/device.c

+2 −0
Original line number Diff line number Diff line
@@ -539,6 +539,8 @@ EXPORT_SYMBOL(ib_dispatch_event); 
int ib_query_device(struct ib_device *device,

		    struct ib_device_attr *device_attr)

{

	memset(device_attr, 0, sizeof(*device_attr));



	return device->query_device(device, device_attr);

}

EXPORT_SYMBOL(ib_query_device);

drivers/infiniband/core/uverbs_cmd.c

+14 −0
Original line number Diff line number Diff line
@@ -3426,6 +3426,8 @@ int ib_uverbs_ex_query_device(struct ib_uverbs_file *file, 
	if (ucore->outlen < resp.response_length)

		return -ENOSPC;



	memset(&attr, 0, sizeof(attr));



	err = device->query_device(device, &attr);

	if (err)

		return err;
@@ -3450,6 +3452,18 @@ int ib_uverbs_ex_query_device(struct ib_uverbs_file *file, 
#endif

	resp.response_length += sizeof(resp.odp_caps);



	if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))

		goto end;



	resp.timestamp_mask = attr.timestamp_mask;

	resp.response_length += sizeof(resp.timestamp_mask);



	if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))

		goto end;



	resp.hca_core_clock = attr.hca_core_clock;

	resp.response_length += sizeof(resp.hca_core_clock);



end:

	err = ib_copy_to_udata(ucore, &resp, resp.response_length);

	if (err)

include/rdma/ib_verbs.h

+2 −0
Original line number Diff line number Diff line
@@ -227,6 +227,8 @@ struct ib_device_attr { 
	int			sig_prot_cap;

	int			sig_guard_cap;

	struct ib_odp_caps	odp_caps;

	uint64_t		timestamp_mask;

	uint64_t		hca_core_clock; /* in KHZ */

};



enum ib_mtu {

include/uapi/rdma/ib_user_verbs.h

+2 −0
Original line number Diff line number Diff line
@@ -223,6 +223,8 @@ struct ib_uverbs_ex_query_device_resp { 
	__u32 comp_mask;

	__u32 response_length;

	struct ib_uverbs_odp_caps odp_caps;

	__u64 timestamp_mask;

	__u64 hca_core_clock; /* in KHZ */

};



struct ib_uverbs_query_port {