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baaad380c0
Commit cb9fbc5c ("IB: expand ib_umem_get() prototype") changed the
mthca userspace ABI to provide a way for userspace to indicate which
memory regions need the DMA write barrier attribute. However, it is
possible to handle this without breaking existing userspace, by having
the mthca kernel driver recognize whether it is talking to old or new
userspace, depending on the size of the register MR structure passed in.
The only potential drawback of this is that is allows old userspace
(which has a bug with DMA ordering on large SGI Altix systems) to
continue to run on new kernels, but the advantage of allowing old
userspace to continue to work on unaffected systems seems to outweigh
this, and we can print a warning to push people to upgrade their
userspace.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
/*
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* Copyright (c) 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005, 2006 Cisco Systems. 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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*/
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#ifndef MTHCA_USER_H
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#define MTHCA_USER_H
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#include <linux/types.h>
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/*
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* Increment this value if any changes that break userspace ABI
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* compatibility are made.
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*/
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#define MTHCA_UVERBS_ABI_VERSION 1
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/*
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* Make sure that all structs defined in this file remain laid out so
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* that they pack the same way on 32-bit and 64-bit architectures (to
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* avoid incompatibility between 32-bit userspace and 64-bit kernels).
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* In particular do not use pointer types -- pass pointers in __u64
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* instead.
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*/
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struct mthca_alloc_ucontext_resp {
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__u32 qp_tab_size;
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__u32 uarc_size;
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};
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struct mthca_alloc_pd_resp {
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__u32 pdn;
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__u32 reserved;
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};
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struct mthca_reg_mr {
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/*
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* Mark the memory region with a DMA attribute that causes
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* in-flight DMA to be flushed when the region is written to:
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*/
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#define MTHCA_MR_DMASYNC 0x1
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__u32 mr_attrs;
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__u32 reserved;
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};
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struct mthca_create_cq {
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__u32 lkey;
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__u32 pdn;
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__u64 arm_db_page;
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__u64 set_db_page;
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__u32 arm_db_index;
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__u32 set_db_index;
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};
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struct mthca_create_cq_resp {
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__u32 cqn;
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__u32 reserved;
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};
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struct mthca_resize_cq {
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__u32 lkey;
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__u32 reserved;
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};
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struct mthca_create_srq {
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__u32 lkey;
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__u32 db_index;
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__u64 db_page;
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};
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struct mthca_create_srq_resp {
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__u32 srqn;
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__u32 reserved;
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};
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struct mthca_create_qp {
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__u32 lkey;
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__u32 reserved;
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__u64 sq_db_page;
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__u64 rq_db_page;
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__u32 sq_db_index;
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__u32 rq_db_index;
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};
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#endif /* MTHCA_USER_H */
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