linux/drivers/infiniband/core/cma_priv.h
Jason Gunthorpe 99cfddb8a8 RDMA/cma: Split apart the multiple uses of the same list heads
Two list heads in the rdma_id_private are being used for multiple
purposes, to save a few bytes of memory. Give the different purposes
different names and union the memory that is clearly exclusive.

list splits into device_item and listen_any_item. device_item is threaded
onto the cma_device's list and listen_any goes onto the
listen_any_list. IDs doing any listen cannot have devices.

listen_list splits into listen_item and listen_list. listen_list is on the
parent listen any rdma_id_private and listen_item is on child listen that
is bound to a specific cma_dev.

Which name should be used in which case depends on the state and other
factors of the rdma_id_private. Remap all the confusing references to make
sense with the new names, so at least there is some hope of matching the
necessary preconditions with each access.

Link: https://lore.kernel.org/r/0-v1-a5ead4a0c19d+c3a-cma_list_head_jgg@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-10-04 16:07:39 -03:00

139 lines
3.9 KiB
C

/*
* Copyright (c) 2005 Voltaire Inc. All rights reserved.
* Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
* Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
* Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _CMA_PRIV_H
#define _CMA_PRIV_H
enum rdma_cm_state {
RDMA_CM_IDLE,
RDMA_CM_ADDR_QUERY,
RDMA_CM_ADDR_RESOLVED,
RDMA_CM_ROUTE_QUERY,
RDMA_CM_ROUTE_RESOLVED,
RDMA_CM_CONNECT,
RDMA_CM_DISCONNECT,
RDMA_CM_ADDR_BOUND,
RDMA_CM_LISTEN,
RDMA_CM_DEVICE_REMOVAL,
RDMA_CM_DESTROYING
};
struct rdma_id_private {
struct rdma_cm_id id;
struct rdma_bind_list *bind_list;
struct hlist_node node;
union {
struct list_head device_item; /* On cma_device->id_list */
struct list_head listen_any_item; /* On listen_any_list */
};
union {
/* On rdma_id_private->listen_list */
struct list_head listen_item;
struct list_head listen_list;
};
struct cma_device *cma_dev;
struct list_head mc_list;
int internal_id;
enum rdma_cm_state state;
spinlock_t lock;
struct mutex qp_mutex;
struct completion comp;
refcount_t refcount;
struct mutex handler_mutex;
int backlog;
int timeout_ms;
struct ib_sa_query *query;
int query_id;
union {
struct ib_cm_id *ib;
struct iw_cm_id *iw;
} cm_id;
u32 seq_num;
u32 qkey;
u32 qp_num;
u32 options;
u8 srq;
u8 tos;
u8 tos_set:1;
u8 timeout_set:1;
u8 min_rnr_timer_set:1;
u8 reuseaddr;
u8 afonly;
u8 timeout;
u8 min_rnr_timer;
u8 used_resolve_ip;
enum ib_gid_type gid_type;
/*
* Internal to RDMA/core, don't use in the drivers
*/
struct rdma_restrack_entry res;
struct rdma_ucm_ece ece;
};
#if IS_ENABLED(CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS)
int cma_configfs_init(void);
void cma_configfs_exit(void);
#else
static inline int cma_configfs_init(void)
{
return 0;
}
static inline void cma_configfs_exit(void)
{
}
#endif
void cma_dev_get(struct cma_device *dev);
void cma_dev_put(struct cma_device *dev);
typedef bool (*cma_device_filter)(struct ib_device *, void *);
struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
void *cookie);
int cma_get_default_gid_type(struct cma_device *dev, u32 port);
int cma_set_default_gid_type(struct cma_device *dev, u32 port,
enum ib_gid_type default_gid_type);
int cma_get_default_roce_tos(struct cma_device *dev, u32 port);
int cma_set_default_roce_tos(struct cma_device *dev, u32 port,
u8 default_roce_tos);
struct ib_device *cma_get_ib_dev(struct cma_device *dev);
#endif /* _CMA_PRIV_H */