From: Matan Barak <[email protected]> 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: Matan Barak <[email protected]> Signed-off-by: Or Gerlitz <[email protected]> --- drivers/infiniband/core/device.c | 2 ++ drivers/infiniband/core/uverbs_cmd.c | 14 ++++++++++++++ include/rdma/ib_verbs.h | 2 ++ include/uapi/rdma/ib_user_verbs.h | 2 ++ 4 files changed, 20 insertions(+), 0 deletions(-) diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index 8d07c12..568cb41 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -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); diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 51311b1..11ee298 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -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) diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 0cb7a0d..96142b5 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -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 { diff --git a/include/uapi/rdma/ib_user_verbs.h b/include/uapi/rdma/ib_user_verbs.h index 19f0256..978841e 100644 --- a/include/uapi/rdma/ib_user_verbs.h +++ b/include/uapi/rdma/ib_user_verbs.h @@ -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 { -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
