1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Copyright 2016-17 IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_POWERPC_VAS_H
#define _ASM_POWERPC_VAS_H
/*
* Min and max FIFO sizes are based on Version 1.05 Section 3.1.4.25
* (Local FIFO Size Register) of the VAS workbook.
*/
#define VAS_RX_FIFO_SIZE_MIN (1 << 10) /* 1KB */
#define VAS_RX_FIFO_SIZE_MAX (8 << 20) /* 8MB */
/*
* Threshold Control Mode: Have paste operation fail if the number of
* requests in receive FIFO exceeds a threshold.
*
* NOTE: No special error code yet if paste is rejected because of these
* limits. So users can't distinguish between this and other errors.
*/
#define VAS_THRESH_DISABLED 0
#define VAS_THRESH_FIFO_GT_HALF_FULL 1
#define VAS_THRESH_FIFO_GT_QTR_FULL 2
#define VAS_THRESH_FIFO_GT_EIGHTH_FULL 3
/*
* Get/Set bit fields
*/
#define GET_FIELD(m, v) (((v) & (m)) >> MASK_LSH(m))
#define MASK_LSH(m) (__builtin_ffsl(m) - 1)
#define SET_FIELD(m, v, val) \
(((v) & ~(m)) | ((((typeof(v))(val)) << MASK_LSH(m)) & (m)))
/*
* Co-processor Engine type.
*/
enum vas_cop_type {
VAS_COP_TYPE_FAULT,
VAS_COP_TYPE_842,
VAS_COP_TYPE_842_HIPRI,
VAS_COP_TYPE_GZIP,
VAS_COP_TYPE_GZIP_HIPRI,
VAS_COP_TYPE_FTW,
VAS_COP_TYPE_MAX,
};
/*
* Receive window attributes specified by the (in-kernel) owner of window.
*/
struct vas_rx_win_attr {
void *rx_fifo;
int rx_fifo_size;
int wcreds_max;
bool pin_win;
bool rej_no_credit;
bool tx_wcred_mode;
bool rx_wcred_mode;
bool tx_win_ord_mode;
bool rx_win_ord_mode;
bool data_stamp;
bool nx_win;
bool fault_win;
bool user_win;
bool notify_disable;
bool intr_disable;
bool notify_early;
int lnotify_lpid;
int lnotify_pid;
int lnotify_tid;
u32 pswid;
int tc_mode;
};
/*
* Window attributes specified by the in-kernel owner of a send window.
*/
struct vas_tx_win_attr {
enum vas_cop_type cop;
int wcreds_max;
int lpid;
int pidr; /* hardware PID (from SPRN_PID) */
int pid; /* linux process id */
int pswid;
int rsvd_txbuf_count;
int tc_mode;
bool user_win;
bool pin_win;
bool rej_no_credit;
bool rsvd_txbuf_enable;
bool tx_wcred_mode;
bool rx_wcred_mode;
bool tx_win_ord_mode;
bool rx_win_ord_mode;
};
/*
* Helper to initialize receive window attributes to defaults for an
* NX window.
*/
void vas_init_rx_win_attr(struct vas_rx_win_attr *rxattr, enum vas_cop_type cop);
/*
* Open a VAS receive window for the instance of VAS identified by @vasid
* Use @attr to initialize the attributes of the window.
*
* Return a handle to the window or ERR_PTR() on error.
*/
struct vas_window *vas_rx_win_open(int vasid, enum vas_cop_type cop,
struct vas_rx_win_attr *attr);
/*
* Helper to initialize send window attributes to defaults for an NX window.
*/
extern void vas_init_tx_win_attr(struct vas_tx_win_attr *txattr,
enum vas_cop_type cop);
/*
* Open a VAS send window for the instance of VAS identified by @vasid
* and the co-processor type @cop. Use @attr to initialize attributes
* of the window.
*
* Note: The instance of VAS must already have an open receive window for
* the coprocessor type @cop.
*
* Return a handle to the send window or ERR_PTR() on error.
*/
struct vas_window *vas_tx_win_open(int vasid, enum vas_cop_type cop,
struct vas_tx_win_attr *attr);
/*
* Close the send or receive window identified by @win. For receive windows
* return -EAGAIN if there are active send windows attached to this receive
* window.
*/
int vas_win_close(struct vas_window *win);
/*
* Copy the co-processor request block (CRB) @crb into the local L2 cache.
*/
int vas_copy_crb(void *crb, int offset);
/*
* Paste a previously copied CRB (see vas_copy_crb()) from the L2 cache to
* the hardware address associated with the window @win. @re is expected/
* assumed to be true for NX windows.
*/
int vas_paste_crb(struct vas_window *win, int offset, bool re);
#endif /* __ASM_POWERPC_VAS_H */
|
