LXR linux/arch/tile/include/asm/hv

   1/*
   2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3 *
   4 *   This program is free software; you can redistribute it and/or
   5 *   modify it under the terms of the GNU General Public License
   6 *   as published by the Free Software Foundation, version 2.
   7 *
   8 *   This program is distributed in the hope that it will be useful, but
   9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11 *   NON INFRINGEMENT.  See the GNU General Public License for
  12 *   more details.
  13 *
  14 * This header defines a wrapper interface for managing hypervisor
  15 * device calls that will result in an interrupt at some later time.
  16 * In particular, this provides wrappers for hv_preada() and
  17 * hv_pwritea().
  18 */
  19
  20#ifndef _ASM_TILE_HV_DRIVER_H
  21#define _ASM_TILE_HV_DRIVER_H
  22
  23#include <hv/hypervisor.h>
  24
  25struct hv_driver_cb;
  26
  27/* A callback to be invoked when an operation completes. */
  28typedef void hv_driver_callback_t(struct hv_driver_cb *cb, __hv32 result);
  29
  30/*
  31 * A structure to hold information about an outstanding call.
  32 * The driver must allocate a separate structure for each call.
  33 */
  34struct hv_driver_cb {
  35        hv_driver_callback_t *callback;  /* Function to call on interrupt. */
  36        void *dev;                       /* Driver-specific state variable. */
  37};
  38
  39/* Wrapper for invoking hv_dev_preada(). */
  40static inline int
  41tile_hv_dev_preada(int devhdl, __hv32 flags, __hv32 sgl_len,
  42                   HV_SGL sgl[/* sgl_len */], __hv64 offset,
  43                   struct hv_driver_cb *callback)
  44{
  45        return hv_dev_preada(devhdl, flags, sgl_len, sgl,
  46                             offset, (HV_IntArg)callback);
  47}
  48
  49/* Wrapper for invoking hv_dev_pwritea(). */
  50static inline int
  51tile_hv_dev_pwritea(int devhdl, __hv32 flags, __hv32 sgl_len,
  52                    HV_SGL sgl[/* sgl_len */], __hv64 offset,
  53                    struct hv_driver_cb *callback)
  54{
  55        return hv_dev_pwritea(devhdl, flags, sgl_len, sgl,
  56                              offset, (HV_IntArg)callback);
  57}
  58
  59
  60#endif /* _ASM_TILE_HV_DRIVER_H */
  61