forked from Minki/linux
b955150ea7
The flushing of work requests for user QPs is implemented entirely in the user mode library. The only kernel interaction is to mark the user QP object indicating it is in error when the QP exits RTS. When the user QP operations are called by the application (eg: post_send, post_recv), the QP in error bit is checked and if set, the library flushes the QP. If, however, the application is not doing IO, but rather just polling the CQ, it will never get flushed work requests. This breaks some classes of applications. This patch adds logic to mark user CQs in error when a QP that is bound to the CQ is marked in error. The library poll code can then notice the CQ is in error and flush all the in error QPs bound to that CQ. Design: - add 1 extra CQE entry to the CQ memory that will be used to indicate in error status. - return the desired CQ memory size that should be mapped by the library - bump the ABI since the create_cq uverbs response changes. - detect older libraries and reduce the mmap size accordingly. (The ABI bump doesn't break old libraries, since they didn't check the ABI field anyway) Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/*
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* Copyright (c) 2006 Chelsio, Inc. 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 __IWCH_USER_H__
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#define __IWCH_USER_H__
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#define IWCH_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 iwch_create_cq_req {
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__u64 user_rptr_addr;
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};
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struct iwch_create_cq_resp_v0 {
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__u64 key;
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__u32 cqid;
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__u32 size_log2;
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};
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struct iwch_create_cq_resp {
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__u64 key;
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__u32 cqid;
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__u32 size_log2;
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__u32 memsize;
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__u32 reserved;
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};
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struct iwch_create_qp_resp {
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__u64 key;
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__u64 db_key;
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__u32 qpid;
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__u32 size_log2;
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__u32 sq_size_log2;
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__u32 rq_size_log2;
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};
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struct iwch_reg_user_mr_resp {
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__u32 pbl_addr;
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};
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#endif
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