f2d9136133
Here is a patch for ehca to use proper flag, ie. GFP_ATOMIC resp. GFP_KERNEL, when calling get_zeroed_page() to prevent "Bug: scheduling while atomic...". This error does not cause a kernel panic but makes ipoib un-usable afterwards. It is reproducible on 2.6.20-rc4 if one does ifconfig down during a flood ping test. I have not observed this error in earlier releases incl. 2.6.20-rc1. This error occurs when a qp event/irq is received and ehca event handler allocates a control block/page to obtain HCA error data block. Use of GFP_ATOMIC when in interrupt context prevents this issue. Signed-off-by Hoang-Nam Nguyen <hnguyen@de.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
191 lines
6.1 KiB
C
191 lines
6.1 KiB
C
/*
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* IBM eServer eHCA Infiniband device driver for Linux on POWER
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*
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* Function definitions for internal functions
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*
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* Authors: Heiko J Schick <schickhj@de.ibm.com>
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* Dietmar Decker <ddecker@de.ibm.com>
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*
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* Copyright (c) 2005 IBM Corporation
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*
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* All rights reserved.
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*
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* This source code is distributed under a dual license of GPL v2.0 and OpenIB
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* BSD.
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*
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* OpenIB BSD License
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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 are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials
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* 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 OWNER 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, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __EHCA_IVERBS_H__
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#define __EHCA_IVERBS_H__
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#include "ehca_classes.h"
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int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props);
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int ehca_query_port(struct ib_device *ibdev, u8 port,
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struct ib_port_attr *props);
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int ehca_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 * pkey);
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int ehca_query_gid(struct ib_device *ibdev, u8 port, int index,
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union ib_gid *gid);
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int ehca_modify_port(struct ib_device *ibdev, u8 port, int port_modify_mask,
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struct ib_port_modify *props);
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struct ib_pd *ehca_alloc_pd(struct ib_device *device,
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struct ib_ucontext *context,
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struct ib_udata *udata);
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int ehca_dealloc_pd(struct ib_pd *pd);
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struct ib_ah *ehca_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
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int ehca_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
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int ehca_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
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int ehca_destroy_ah(struct ib_ah *ah);
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struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
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struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
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struct ib_phys_buf *phys_buf_array,
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int num_phys_buf,
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int mr_access_flags, u64 *iova_start);
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struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd,
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struct ib_umem *region,
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int mr_access_flags, struct ib_udata *udata);
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int ehca_rereg_phys_mr(struct ib_mr *mr,
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int mr_rereg_mask,
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struct ib_pd *pd,
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struct ib_phys_buf *phys_buf_array,
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int num_phys_buf, int mr_access_flags, u64 *iova_start);
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int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr);
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int ehca_dereg_mr(struct ib_mr *mr);
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struct ib_mw *ehca_alloc_mw(struct ib_pd *pd);
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int ehca_bind_mw(struct ib_qp *qp, struct ib_mw *mw,
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struct ib_mw_bind *mw_bind);
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int ehca_dealloc_mw(struct ib_mw *mw);
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struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
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int mr_access_flags,
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struct ib_fmr_attr *fmr_attr);
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int ehca_map_phys_fmr(struct ib_fmr *fmr,
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u64 *page_list, int list_len, u64 iova);
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int ehca_unmap_fmr(struct list_head *fmr_list);
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int ehca_dealloc_fmr(struct ib_fmr *fmr);
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enum ehca_eq_type {
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EHCA_EQ = 0, /* Event Queue */
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EHCA_NEQ /* Notification Event Queue */
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};
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int ehca_create_eq(struct ehca_shca *shca, struct ehca_eq *eq,
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enum ehca_eq_type type, const u32 length);
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int ehca_destroy_eq(struct ehca_shca *shca, struct ehca_eq *eq);
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void *ehca_poll_eq(struct ehca_shca *shca, struct ehca_eq *eq);
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struct ib_cq *ehca_create_cq(struct ib_device *device, int cqe,
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struct ib_ucontext *context,
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struct ib_udata *udata);
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int ehca_destroy_cq(struct ib_cq *cq);
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int ehca_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata);
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int ehca_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc);
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int ehca_peek_cq(struct ib_cq *cq, int wc_cnt);
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int ehca_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify cq_notify);
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struct ib_qp *ehca_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 ehca_destroy_qp(struct ib_qp *qp);
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int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
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struct ib_udata *udata);
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int ehca_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
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int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr);
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int ehca_post_send(struct ib_qp *qp, struct ib_send_wr *send_wr,
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struct ib_send_wr **bad_send_wr);
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int ehca_post_recv(struct ib_qp *qp, struct ib_recv_wr *recv_wr,
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struct ib_recv_wr **bad_recv_wr);
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u64 ehca_define_sqp(struct ehca_shca *shca, struct ehca_qp *ibqp,
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struct ib_qp_init_attr *qp_init_attr);
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int ehca_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
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int ehca_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
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struct ib_ucontext *ehca_alloc_ucontext(struct ib_device *device,
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struct ib_udata *udata);
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int ehca_dealloc_ucontext(struct ib_ucontext *context);
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int ehca_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
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void ehca_poll_eqs(unsigned long data);
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int ehca_mmap_nopage(u64 foffset,u64 length,void **mapped,
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struct vm_area_struct **vma);
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int ehca_mmap_register(u64 physical,void **mapped,
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struct vm_area_struct **vma);
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int ehca_munmap(unsigned long addr, size_t len);
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#ifdef CONFIG_PPC_64K_PAGES
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void *ehca_alloc_fw_ctrlblock(gfp_t flags);
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void ehca_free_fw_ctrlblock(void *ptr);
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#else
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#define ehca_alloc_fw_ctrlblock(flags) ((void *) get_zeroed_page(flags))
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#define ehca_free_fw_ctrlblock(ptr) free_page((unsigned long)(ptr))
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#endif
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#endif
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