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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | AUTHORS | COLOPHON |
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IBV_QUERY_PORT(3) Libibverbs Programmer's Manual IBV_QUERY_PORT(3)
ibv_query_port - query an RDMA port's attributes
#include <infiniband/verbs.h>
int ibv_query_port(struct ibv_context *context, uint8_t port_num,
struct ibv_port_attr *port_attr);
ibv_query_port() returns the attributes of port port_num for
device context context through the pointer port_attr. The
argument port_attr is an ibv_port_attr struct, as defined in
<infiniband/verbs.h>.
struct ibv_port_attr {
enum ibv_port_state state; /* Logical port state */
enum ibv_mtu max_mtu; /* Max MTU supported by port */
enum ibv_mtu active_mtu; /* Actual MTU */
int gid_tbl_len; /* Length of source GID table */
uint32_t port_cap_flags; /* Port capabilities */
uint32_t max_msg_sz; /* Maximum message size */
uint32_t bad_pkey_cntr; /* Bad P_Key counter */
uint32_t qkey_viol_cntr; /* Q_Key violation counter */
uint16_t pkey_tbl_len; /* Length of partition table */
uint16_t lid; /* Base port LID */
uint16_t sm_lid; /* SM LID */
uint8_t lmc; /* LMC of LID */
uint8_t max_vl_num; /* Maximum number of VLs */
uint8_t sm_sl; /* SM service level */
uint8_t subnet_timeout; /* Subnet propagation delay */
uint8_t init_type_reply;/* Type of initialization performed by SM */
uint8_t active_width; /* Currently active link width */
uint8_t active_speed; /* Currently active link speed if speed<XDR,NDR otherwise */
uint8_t phys_state; /* Physical port state */
uint8_t link_layer; /* link layer protocol of the port */
uint8_t flags; /* Port flags */
uint16_t port_cap_flags2;/* Port capabilities */
uint32_t active_speed_ex;/* Currently active link speed, if it is 0 refer to active_speed instead */
};
possible values for the link layer field are IBV_LINK_LAYER_INFINIBAND,
IBV_LINK_LAYER_ETHERNET, or IBV_LINK_LAYER_UNSPECIFIED.
supported port flags:
IBV_QPF_GRH_REQUIRED - When this flag is set, the applications must create all AH with GRH configured.
ibv_query_port() returns 0 on success, or the value of errno on
failure (which indicates the failure reason).
ibv_create_qp(3), ibv_destroy_qp(3), ibv_query_qp(3),
ibv_create_ah(3)
Dotan Barak <dotanba@gmail.com>
This page is part of the rdma-core (RDMA Core Userspace Libraries
and Daemons) project. Information about the project can be found
at ⟨https://github.com/linux-rdma/rdma-core⟩. If you have a bug
report for this manual page, send it to
linux-rdma@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2024-06-14. (At
that time, the date of the most recent commit that was found in
the repository was 2024-06-10.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
libibverbs 2006-10-31 IBV_QUERY_PORT(3)
Pages that refer to this page: ibv_open_device(3), ibv_query_device(3), ibv_query_device_ex(3), ibv_query_rt_values_ex(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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