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The SRP initiator allows to set max_sectors to a value that exceeds the largest amount of data that can be mapped at once with an mlx4 HCA using fast registration and a page size of 4 KB. Hence modify ib_map_mr_sg() such that it can map partial sg-elements. If an sg-element has been mapped partially, let the caller know which fraction has been mapped by adjusting *sg_offset. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Laurence Oberman <loberman@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Doug Ledford <dledford@redhat.com>
129 lines
5.2 KiB
C
129 lines
5.2 KiB
C
/* This file is part of the Emulex RoCE Device Driver for
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* RoCE (RDMA over Converged Ethernet) adapters.
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* Copyright (C) 2012-2015 Emulex. All rights reserved.
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* EMULEX and SLI are trademarks of Emulex.
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* www.emulex.com
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*
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* This software is available to you under a choice of one of two licenses.
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* You may choose to be licensed under the terms of the GNU General Public
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* License (GPL) Version 2, available from the file COPYING in the main
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* directory of this source tree, or the BSD license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Contact Information:
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* linux-drivers@emulex.com
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*
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* Emulex
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* 3333 Susan Street
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* Costa Mesa, CA 92626
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*/
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#ifndef __OCRDMA_VERBS_H__
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#define __OCRDMA_VERBS_H__
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int ocrdma_post_send(struct ib_qp *, struct ib_send_wr *,
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struct ib_send_wr **bad_wr);
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int ocrdma_post_recv(struct ib_qp *, struct ib_recv_wr *,
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struct ib_recv_wr **bad_wr);
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int ocrdma_poll_cq(struct ib_cq *, int num_entries, struct ib_wc *wc);
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int ocrdma_arm_cq(struct ib_cq *, enum ib_cq_notify_flags flags);
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int ocrdma_query_device(struct ib_device *, struct ib_device_attr *props,
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struct ib_udata *uhw);
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int ocrdma_query_port(struct ib_device *, u8 port, struct ib_port_attr *props);
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int ocrdma_modify_port(struct ib_device *, u8 port, int mask,
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struct ib_port_modify *props);
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enum rdma_protocol_type
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ocrdma_query_protocol(struct ib_device *device, u8 port_num);
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void ocrdma_get_guid(struct ocrdma_dev *, u8 *guid);
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int ocrdma_query_gid(struct ib_device *, u8 port,
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int index, union ib_gid *gid);
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struct net_device *ocrdma_get_netdev(struct ib_device *device, u8 port_num);
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int ocrdma_add_gid(struct ib_device *device,
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u8 port_num,
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unsigned int index,
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const union ib_gid *gid,
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const struct ib_gid_attr *attr,
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void **context);
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int ocrdma_del_gid(struct ib_device *device,
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u8 port_num,
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unsigned int index,
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void **context);
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int ocrdma_query_pkey(struct ib_device *, u8 port, u16 index, u16 *pkey);
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struct ib_ucontext *ocrdma_alloc_ucontext(struct ib_device *,
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struct ib_udata *);
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int ocrdma_dealloc_ucontext(struct ib_ucontext *);
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int ocrdma_mmap(struct ib_ucontext *, struct vm_area_struct *vma);
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struct ib_pd *ocrdma_alloc_pd(struct ib_device *,
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struct ib_ucontext *, struct ib_udata *);
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int ocrdma_dealloc_pd(struct ib_pd *pd);
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struct ib_cq *ocrdma_create_cq(struct ib_device *ibdev,
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const struct ib_cq_init_attr *attr,
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struct ib_ucontext *ib_ctx,
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struct ib_udata *udata);
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int ocrdma_resize_cq(struct ib_cq *, int cqe, struct ib_udata *);
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int ocrdma_destroy_cq(struct ib_cq *);
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struct ib_qp *ocrdma_create_qp(struct ib_pd *,
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struct ib_qp_init_attr *attrs,
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struct ib_udata *);
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int _ocrdma_modify_qp(struct ib_qp *, struct ib_qp_attr *attr,
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int attr_mask);
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int ocrdma_modify_qp(struct ib_qp *, struct ib_qp_attr *attr,
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int attr_mask, struct ib_udata *udata);
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int ocrdma_query_qp(struct ib_qp *,
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struct ib_qp_attr *qp_attr,
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int qp_attr_mask, struct ib_qp_init_attr *);
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int ocrdma_destroy_qp(struct ib_qp *);
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void ocrdma_del_flush_qp(struct ocrdma_qp *qp);
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struct ib_srq *ocrdma_create_srq(struct ib_pd *, struct ib_srq_init_attr *,
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struct ib_udata *);
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int ocrdma_modify_srq(struct ib_srq *, struct ib_srq_attr *,
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enum ib_srq_attr_mask, struct ib_udata *);
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int ocrdma_query_srq(struct ib_srq *, struct ib_srq_attr *);
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int ocrdma_destroy_srq(struct ib_srq *);
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int ocrdma_post_srq_recv(struct ib_srq *, struct ib_recv_wr *,
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struct ib_recv_wr **bad_recv_wr);
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int ocrdma_dereg_mr(struct ib_mr *);
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struct ib_mr *ocrdma_get_dma_mr(struct ib_pd *, int acc);
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struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *, u64 start, u64 length,
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u64 virt, int acc, struct ib_udata *);
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struct ib_mr *ocrdma_alloc_mr(struct ib_pd *pd,
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enum ib_mr_type mr_type,
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u32 max_num_sg);
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int ocrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
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unsigned int *sg_offset);
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#endif /* __OCRDMA_VERBS_H__ */
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