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
25 struct hv_driver_cb;
26
27 /* A callback to be invoked when an operation completes. */
28 typedef 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 */
34 struct 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(). */
40 static inline int
tile_hv_dev_preada(int devhdl,__hv32 flags,__hv32 sgl_len,HV_SGL sgl[],__hv64 offset,struct hv_driver_cb * callback)41 tile_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(). */
50 static inline int
tile_hv_dev_pwritea(int devhdl,__hv32 flags,__hv32 sgl_len,HV_SGL sgl[],__hv64 offset,struct hv_driver_cb * callback)51 tile_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