drivers/staging/rdma/ehca/hcp_phyp.h

   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 */
  52 struct 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  */
  61 struct 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
  69 static 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
  75 static 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
  81 int hcp_galpas_ctor(struct h_galpas *galpas, int is_user,
  82                     u64 paddr_kernel, u64 paddr_user);
  83
  84 int hcp_galpas_dtor(struct h_galpas *galpas);
  85
  86 u64 hcall_map_page(u64 physaddr);
  87
  88 int hcall_unmap_page(u64 mapaddr);
  89
  90 #endif