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3aeffc46af
Introduce the ability for kernel ULPs to adjust the minimum RNR Retry timer. The INIT -> RTR transition executed by RDMA CM will be used for this adjustment. This avoids an additional ib_modify_qp() call. rdma_set_min_rnr_timer() must be called before the call to rdma_connect() on the active side and before the call to rdma_accept() on the passive side. The default value of RNR Retry timer is zero, which translates to 655 ms. When the receiver is not ready to accept a send messages, it encodes the RNR Retry timer value in the NAK. The requestor will then wait at least the specified time value before retrying the send. The 5-bit value to be supplied to the rdma_set_min_rnr_timer() is documented in IBTA Table 45: "Encoding for RNR NAK Timer Field". Link: https://lore.kernel.org/r/1617216194-12890-2-git-send-email-haakon.bugge@oracle.com Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com> Acked-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
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* Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
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* Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _CMA_PRIV_H
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#define _CMA_PRIV_H
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enum rdma_cm_state {
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RDMA_CM_IDLE,
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RDMA_CM_ADDR_QUERY,
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RDMA_CM_ADDR_RESOLVED,
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RDMA_CM_ROUTE_QUERY,
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RDMA_CM_ROUTE_RESOLVED,
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RDMA_CM_CONNECT,
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RDMA_CM_DISCONNECT,
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RDMA_CM_ADDR_BOUND,
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RDMA_CM_LISTEN,
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RDMA_CM_DEVICE_REMOVAL,
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RDMA_CM_DESTROYING
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};
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struct rdma_id_private {
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struct rdma_cm_id id;
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struct rdma_bind_list *bind_list;
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struct hlist_node node;
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struct list_head list; /* listen_any_list or cma_device.list */
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struct list_head listen_list; /* per device listens */
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struct cma_device *cma_dev;
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struct list_head mc_list;
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int internal_id;
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enum rdma_cm_state state;
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spinlock_t lock;
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struct mutex qp_mutex;
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struct completion comp;
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refcount_t refcount;
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struct mutex handler_mutex;
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int backlog;
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int timeout_ms;
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struct ib_sa_query *query;
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int query_id;
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union {
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struct ib_cm_id *ib;
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struct iw_cm_id *iw;
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} cm_id;
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u32 seq_num;
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u32 qkey;
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u32 qp_num;
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u32 options;
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u8 srq;
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u8 tos;
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u8 tos_set:1;
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u8 timeout_set:1;
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u8 min_rnr_timer_set:1;
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u8 reuseaddr;
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u8 afonly;
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u8 timeout;
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u8 min_rnr_timer;
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enum ib_gid_type gid_type;
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/*
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* Internal to RDMA/core, don't use in the drivers
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*/
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struct rdma_restrack_entry res;
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struct rdma_ucm_ece ece;
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};
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#if IS_ENABLED(CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS)
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int cma_configfs_init(void);
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void cma_configfs_exit(void);
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#else
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static inline int cma_configfs_init(void)
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{
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return 0;
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}
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static inline void cma_configfs_exit(void)
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{
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}
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#endif
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void cma_dev_get(struct cma_device *dev);
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void cma_dev_put(struct cma_device *dev);
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typedef bool (*cma_device_filter)(struct ib_device *, void *);
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struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
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void *cookie);
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int cma_get_default_gid_type(struct cma_device *dev, u32 port);
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int cma_set_default_gid_type(struct cma_device *dev, u32 port,
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enum ib_gid_type default_gid_type);
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int cma_get_default_roce_tos(struct cma_device *dev, u32 port);
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int cma_set_default_roce_tos(struct cma_device *dev, u32 port,
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u8 default_roce_tos);
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struct ib_device *cma_get_ib_dev(struct cma_device *dev);
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#endif /* _CMA_PRIV_H */
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