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Since neither ib_post_send() nor ib_post_recv() modify the data structure their second argument points at, declare that argument const. This change makes it necessary to declare the 'bad_wr' argument const too and also to modify all ULPs that call ib_post_send(), ib_post_recv() or ib_post_srq_recv(). This patch does not change any functionality but makes it possible for the compiler to verify whether the ib_post_(send|recv|srq_recv) really do not modify the posted work request. To make this possible, only one cast had to be introduce that casts away constness, namely in rpcrdma_post_recvs(). The only way I can think of to avoid that cast is to introduce an additional loop in that function or to change the data type of bad_wr from struct ib_recv_wr ** into int (an index that refers to an element in the work request list). However, both approaches would require even more extensive changes than this patch. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
93 lines
3.8 KiB
C
93 lines
3.8 KiB
C
/*
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* Copyright (c) 2013, Cisco Systems, 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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* 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 USNIC_IB_VERBS_H_
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#define USNIC_IB_VERBS_H_
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#include "usnic_ib.h"
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enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
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u8 port_num);
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int usnic_ib_query_device(struct ib_device *ibdev,
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struct ib_device_attr *props,
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struct ib_udata *uhw);
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int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
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struct ib_port_attr *props);
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int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
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int qp_attr_mask,
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struct ib_qp_init_attr *qp_init_attr);
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int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
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union ib_gid *gid);
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struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num);
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int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
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u16 *pkey);
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struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
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struct ib_ucontext *context,
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struct ib_udata *udata);
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int usnic_ib_dealloc_pd(struct ib_pd *pd);
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struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
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struct ib_qp_init_attr *init_attr,
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struct ib_udata *udata);
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int usnic_ib_destroy_qp(struct ib_qp *qp);
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int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
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int attr_mask, struct ib_udata *udata);
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struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
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const struct ib_cq_init_attr *attr,
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struct ib_ucontext *context,
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struct ib_udata *udata);
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int usnic_ib_destroy_cq(struct ib_cq *cq);
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struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
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u64 virt_addr, int access_flags,
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struct ib_udata *udata);
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int usnic_ib_dereg_mr(struct ib_mr *ibmr);
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struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
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struct ib_udata *udata);
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int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext);
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int usnic_ib_mmap(struct ib_ucontext *context,
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struct vm_area_struct *vma);
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struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
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struct rdma_ah_attr *ah_attr,
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struct ib_udata *udata);
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int usnic_ib_destroy_ah(struct ib_ah *ah);
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int usnic_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
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const struct ib_send_wr **bad_wr);
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int usnic_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
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const struct ib_recv_wr **bad_wr);
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int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
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struct ib_wc *wc);
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int usnic_ib_req_notify_cq(struct ib_cq *cq,
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enum ib_cq_notify_flags flags);
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struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc);
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#endif /* !USNIC_IB_VERBS_H */
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