/*
* Copyright (c) 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
* Copyright (c) 2005 PathScale, Inc. 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 UVERBS_H
#define UVERBS_H
#include <linux/kref.h>
#include <linux/idr.h>
#include <linux/mutex.h>
#include <linux/completion.h>
#include <linux/cdev.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/uverbs_std_types.h>
#define UVERBS_MODULE_NAME ib_uverbs
#include <rdma/uverbs_named_ioctl.h>
static inline void
ib_uverbs_init_udata(struct ib_udata *udata,
const void __user *ibuf,
void __user *obuf,
size_t ilen, size_t olen)
{
udata->inbuf = ibuf;
udata->outbuf = obuf;
udata->inlen = ilen;
udata->outlen = olen;
}
static inline void
ib_uverbs_init_udata_buf_or_null(struct ib_udata *udata,
const void __user *ibuf,
void __user *obuf,
size_t ilen, size_t olen)
{
ib_uverbs_init_udata(udata,
ilen ? ibuf : NULL, olen ? obuf : NULL,
ilen, olen);
}
/*
* Our lifetime rules for these structs are the following:
*
* struct ib_uverbs_device: One reference is held by the module and
* released in ib_uverbs_remove_one(). Another reference is taken by
* ib_uverbs_open() each time the character special file is opened,
* and released in ib_uverbs_release_file() when the file is released.
*
* struct ib_uverbs_file: One reference is held by the VFS and
* released when the file is closed. Another reference is taken when
* an asynchronous event queue file is created and released when the
* event file is closed.
*
* struct ib_uverbs_event_queue: Base structure for
* struct ib_uverbs_async_event_file and struct ib_uverbs_completion_event_file.
* One reference is held by the VFS and released when the file is closed.
* For asynchronous event files, another reference is held by the corresponding
* main context file and released when that file is closed. For completion
* event files, a reference is taken when a CQ is created that uses the file,
* and released when the CQ is destroyed.
*/
struct ib_uverbs_device {
atomic_t refcount;
u32 num_comp_vectors;
struct completion comp;
struct device dev;
/* First group for device attributes, NULL terminated array */
const struct attribute_group *groups[2];
struct ib_device __rcu *ib_dev;
int devnum;
struct cdev cdev;
struct rb_root xrcd_tree;
struct mutex xrcd_tree_mutex;
struct srcu_struct disassociate_srcu;
struct mutex lists_mutex; /* protect lists */
struct list_head uverbs_file_list;
struct list_head uverbs_events_file_list;
struct uverbs_api *uapi;
};
struct ib_uverbs_event_queue {
spinlock_t lock;
int is_closed;
wait_queue_head_t poll_wait;
struct fasync_struct *async_queue;
struct list_head event_list;
};
struct ib_uverbs_async_event_file {
struct ib_uverbs_event_queue ev_queue;
struct ib_uverbs_file *uverbs_file;
struct kref ref;
struct list_head list;
};
struct ib_uverbs_completion_event_file {
struct ib_uobject uobj;
struct ib_uverbs_event_queue ev_queue;
};
struct ib_uverbs_file {
struct kref ref;
struct ib_uverbs_device *device;
struct mutex ucontext_lock;
/*
* ucontext must be accessed via ib_uverbs_get_ucontext() or with
* ucontext_lock held
*/
struct ib_ucontext *ucontext;
struct ib_event_handler event_handler;
struct ib_uverbs_async_event_file *async_file;
struct list_head list;
/*
* To access the uobjects list hw_destroy_rwsem must be held for write
* OR hw_destroy_rwsem held for read AND uobjects_lock held.
* hw_destroy_rwsem should be called across any destruction of the HW
* object of an associated uobject.
*/
struct rw_semaphore hw_destroy_rwsem;
spinlock_t uobjects_lock;
struct list_head uobjects;
struct mutex umap_lock;
struct list_head umaps;
struct page *disassociate_page;
struct xarray idr;
};
struct ib_uverbs_event {
union {
struct ib_uverbs_async_event_desc async;
struct ib_uverbs_comp_event_desc comp;
} desc;
struct list_head list;
struct list_head obj_list;
u32 *counter;
};
struct ib_uverbs_mcast_entry {
struct list_head list;
union ib_gid gid;
u16 lid;
};
struct ib_uevent_object {
struct ib_uobject uobject;
struct list_head event_list;
u32 events_reported;
};
struct ib_uxrcd_object {
struct ib_uobject uobject;
atomic_t refcnt;
};
struct ib_usrq_object {
struct ib_uevent_object uevent;
struct ib_uxrcd_object *uxrcd;
};
struct ib_uqp_object {
struct ib_uevent_object uevent;
/* lock for mcast list */
struct mutex mcast_lock;
struct list_head mcast_list;
struct ib_uxrcd_object *uxrcd;
};
struct ib_uwq_object {
struct ib_uevent_object uevent;
};
struct ib_ucq_object {
struct ib_uobject uobject;
struct list_head comp_list;
struct list_head async_list;
u32 comp_events_reported;
u32 async_events_reported;
};
extern const struct file_operations uverbs_event_fops;
void ib_uverbs_init_event_queue(struct ib_uverbs_event_queue *ev_queue);
struct file *ib_uverbs_alloc_async_event_file(struct ib_uverbs_file *uverbs_file,
struct ib_device *ib_dev);
void ib_uverbs_free_async_event_file(struct ib_uverbs_file *uverbs_file);
void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res);
void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
struct ib_uverbs_completion_event_file *ev_file,
struct ib_ucq_object *uobj);
void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
struct ib_uevent_object *uobj);
void ib_uverbs_release_file(struct kref *ref);
void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_wq_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_event_handler(struct ib_event_handler *handler,
struct ib_event *event);
int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd,
enum rdma_remove_reason why,
struct uverbs_attr_bundle *attrs);
int uverbs_dealloc_mw(struct ib_mw *mw);
void ib_uverbs_detach_umcast(struct ib_qp *qp,
struct ib_uqp_object *uobj);
long ib_uverbs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
struct ib_uverbs_flow_spec {
union {
union {
struct ib_uverbs_flow_spec_hdr hdr;
struct {
__u32 type;
__u16 size;
__u16 reserved;
};
};
struct ib_uverbs_flow_spec_eth eth;
struct ib_uverbs_flow_spec_ipv4 ipv4;
struct ib_uverbs_flow_spec_esp esp;
struct ib_uverbs_flow_spec_tcp_udp tcp_udp;
struct ib_uverbs_flow_spec_ipv6 ipv6;
struct ib_uverbs_flow_spec_action_tag flow_tag;
struct ib_uverbs_flow_spec_action_drop drop;
struct ib_uverbs_flow_spec_action_handle action;
struct ib_uverbs_flow_spec_action_count flow_count;
};
};
int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
const void *kern_spec_mask,
const void *kern_spec_val,
size_t kern_filter_sz,
union ib_flow_spec *ib_spec);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_DEVICE);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_PD);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_MR);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_COMP_CHANNEL);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_CQ);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_QP);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_AH);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_MW);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_SRQ);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_FLOW);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_WQ);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_XRCD);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_FLOW_ACTION);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_DM);
extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_COUNTERS);
/*
* ib_uverbs_query_port_resp.port_cap_flags started out as just a copy of the
* PortInfo CapabilityMask, but was extended with unique bits.
*/
static inline u32 make_port_cap_flags(const struct ib_port_attr *attr)
{
u32 res;
/* All IBA CapabilityMask bits are passed through here, except bit 26,
* which is overridden with IP_BASED_GIDS. This is due to a historical
* mistake in the implementation of IP_BASED_GIDS. Otherwise all other
* bits match the IBA definition across all kernel versions.
*/
res = attr->port_cap_flags & ~(u32)IB_UVERBS_PCF_IP_BASED_GIDS;
if (attr->ip_gids)
res |= IB_UVERBS_PCF_IP_BASED_GIDS;
return res;
}
void copy_port_attr_to_resp(struct ib_port_attr *attr,
struct ib_uverbs_query_port_resp *resp,
struct ib_device *ib_dev, u8 port_num);
#endif /* UVERBS_H */