LXR linux/drivers/infiniband/hw/ehca/hcp

   1/*
   2 *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3 *
   4 *  Firmware calls
   5 *
   6 *  Authors: Christoph Raisch <raisch@de.ibm.com>
   7 *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
   8 *           Waleri Fomin <fomin@de.ibm.com>
   9 *           Gerd Bayer <gerd.bayer@de.ibm.com>
  10 *
  11 *  Copyright (c) 2005 IBM Corporation
  12 *
  13 *  All rights reserved.
  14 *
  15 *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  16 *  BSD.
  17 *
  18 * OpenIB BSD License
  19 *
  20 * Redistribution and use in source and binary forms, with or without
  21 * modification, are permitted provided that the following conditions are met:
  22 *
  23 * Redistributions of source code must retain the above copyright notice, this
  24 * list of conditions and the following disclaimer.
  25 *
  26 * Redistributions in binary form must reproduce the above copyright notice,
  27 * this list of conditions and the following disclaimer in the documentation
  28 * and/or other materials
  29 * provided with the distribution.
  30 *
  31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  32 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  34 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  35 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  36 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  37 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  38 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  39 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41 * POSSIBILITY OF SUCH DAMAGE.
  42 */
  43
  44#ifndef __HCP_PHYP_H__
  45#define __HCP_PHYP_H__
  46
  47
  48/*
  49 * eHCA page (mapped into memory)
  50 * resource to access eHCA register pages in CPU address space
  51*/
  52struct h_galpa {
  53        u64 fw_handle;
  54        /* for pSeries this is a 64bit memory address where
  55           I/O memory is mapped into CPU address space (kv) */
  56};
  57
  58/*
  59 * resource to access eHCA address space registers, all types
  60 */
  61struct h_galpas {
  62        u32 pid;                /*PID of userspace galpa checking */
  63        struct h_galpa user;    /* user space accessible resource,
  64                                   set to 0 if unused */
  65        struct h_galpa kernel;  /* kernel space accessible resource,
  66                                   set to 0 if unused */
  67};
  68
  69static inline u64 hipz_galpa_load(struct h_galpa galpa, u32 offset)
  70{
  71        u64 addr = galpa.fw_handle + offset;
  72        return *(volatile u64 __force *)addr;
  73}
  74
  75static inline void hipz_galpa_store(struct h_galpa galpa, u32 offset, u64 value)
  76{
  77        u64 addr = galpa.fw_handle + offset;
  78        *(volatile u64 __force *)addr = value;
  79}
  80
  81int hcp_galpas_ctor(struct h_galpas *galpas, int is_user,
  82                    u64 paddr_kernel, u64 paddr_user);
  83
  84int hcp_galpas_dtor(struct h_galpas *galpas);
  85
  86int hcall_map_page(u64 physaddr, u64 * mapaddr);
  87
  88int hcall_unmap_page(u64 mapaddr);
  89
  90#endif
  91