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#ifndef DEF_RDMA_VT_H
#define DEF_RDMA_VT_H
/*
* Copyright(c) 2015 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* 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.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* Structure that low level drivers will populate in order to register with the
* rdmavt layer.
*/
#include "ib_verbs.h"
/*
* For Memory Regions. This stuff should probably be moved into rdmavt/mr.h once
* drivers no longer need access to the MR directly.
*/
/*
* A segment is a linear region of low physical memory.
* Used by the verbs layer.
*/
struct rvt_seg {
void *vaddr;
size_t length;
};
/* The number of rvt_segs that fit in a page. */
#define RVT_SEGSZ (PAGE_SIZE / sizeof(struct rvt_seg))
struct rvt_segarray {
struct rvt_seg segs[RVT_SEGSZ];
};
struct rvt_mregion {
struct ib_pd *pd; /* shares refcnt of ibmr.pd */
u64 user_base; /* User's address for this region */
u64 iova; /* IB start address of this region */
size_t length;
u32 lkey;
u32 offset; /* offset (bytes) to start of region */
int access_flags;
u32 max_segs; /* number of rvt_segs in all the arrays */
u32 mapsz; /* size of the map array */
u8 page_shift; /* 0 - non unform/non powerof2 sizes */
u8 lkey_published; /* in global table */
struct completion comp; /* complete when refcount goes to zero */
atomic_t refcount;
struct rvt_segarray *map[0]; /* the segments */
};
#define RVT_MAX_LKEY_TABLE_BITS 23
struct rvt_lkey_table {
spinlock_t lock; /* protect changes in this struct */
u32 next; /* next unused index (speeds search) */
u32 gen; /* generation count */
u32 max; /* size of the table */
struct rvt_mregion __rcu **table;
};
/* End Memmory Region */
/*
* Things that are driver specific, module parameters in hfi1 and qib
*/
struct rvt_driver_params {
/*
* driver required fields:
* node_guid
* phys_port_cnt
* dma_device
* owner
* driver optional fields (rvt will provide generic value if blank):
* name
* node_desc
* rvt fields, driver value ignored:
* uverbs_abi_ver
* node_type
* num_comp_vectors
* uverbs_cmd_mask
*/
struct ib_device_attr props;
/*
* Drivers will need to support a number of notifications to rvt in
* accordance with certain events. This structure should contain a mask
* of the supported events. Such events that the rvt may need to know
* about include:
* port errors
* port active
* lid change
* sm change
* client reregister
* pkey change
*
* There may also be other events that the rvt layers needs to know
* about this is not an exhaustive list. Some events though rvt does not
* need to rely on the driver for such as completion queue error.
*/
int rvt_signal_supported;
/*
* Anything driver specific that is not covered by props
* For instance special module parameters. Goes here.
*/
};
/* Protection domain */
struct rvt_pd {
struct ib_pd ibpd;
int user; /* non-zero if created from user space */
};
struct rvt_dev_info {
/*
* Prior to calling for registration the driver will be responsible for
* allocating space for this structure.
*
* The driver will also be responsible for filling in certain members of
* dparms.props
*/
struct ib_device ibdev;
/* Driver specific properties */
struct rvt_driver_params dparms;
struct rvt_mregion __rcu *dma_mr;
struct rvt_lkey_table lkey_table;
/* PKey Table goes here */
/*
* The work to create port files in /sys/class Infiniband is different
* depending on the driver. This should not be extracted away and
* instead drivers are responsible for setting the correct callback for
* this.
*/
int (*port_callback)(struct ib_device *, u8, struct kobject *);
/* Internal use */
int n_pds_allocated;
spinlock_t n_pds_lock; /* Protect pd allocated count */
};
static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd)
{
return container_of(ibpd, struct rvt_pd, ibpd);
}
static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev)
{
return container_of(ibdev, struct rvt_dev_info, ibdev);
}
int rvt_register_device(struct rvt_dev_info *rvd);
void rvt_unregister_device(struct rvt_dev_info *rvd);
#endif /* DEF_RDMA_VT_H */
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