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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*/
#ifndef IXP4XX_QMGR_H
#define IXP4XX_QMGR_H
#include <linux/io.h>
#include <linux/kernel.h>
#define DEBUG_QMGR 0
#define HALF_QUEUES 32
#define QUEUES 64
#define MAX_QUEUE_LENGTH 4 /* in dwords */
#define QUEUE_STAT1_EMPTY 1 /* queue status bits */
#define QUEUE_STAT1_NEARLY_EMPTY 2
#define QUEUE_STAT1_NEARLY_FULL 4
#define QUEUE_STAT1_FULL 8
#define QUEUE_STAT2_UNDERFLOW 1
#define QUEUE_STAT2_OVERFLOW 2
#define QUEUE_WATERMARK_0_ENTRIES 0
#define QUEUE_WATERMARK_1_ENTRY 1
#define QUEUE_WATERMARK_2_ENTRIES 2
#define QUEUE_WATERMARK_4_ENTRIES 3
#define QUEUE_WATERMARK_8_ENTRIES 4
#define QUEUE_WATERMARK_16_ENTRIES 5
#define QUEUE_WATERMARK_32_ENTRIES 6
#define QUEUE_WATERMARK_64_ENTRIES 7
/* queue interrupt request conditions */
#define QUEUE_IRQ_SRC_EMPTY 0
#define QUEUE_IRQ_SRC_NEARLY_EMPTY 1
#define QUEUE_IRQ_SRC_NEARLY_FULL 2
#define QUEUE_IRQ_SRC_FULL 3
#define QUEUE_IRQ_SRC_NOT_EMPTY 4
#define QUEUE_IRQ_SRC_NOT_NEARLY_EMPTY 5
#define QUEUE_IRQ_SRC_NOT_NEARLY_FULL 6
#define QUEUE_IRQ_SRC_NOT_FULL 7
struct qmgr_regs {
u32 acc[QUEUES][MAX_QUEUE_LENGTH]; /* 0x000 - 0x3FF */
u32 stat1[4]; /* 0x400 - 0x40F */
u32 stat2[2]; /* 0x410 - 0x417 */
u32 statne_h; /* 0x418 - queue nearly empty */
u32 statf_h; /* 0x41C - queue full */
u32 irqsrc[4]; /* 0x420 - 0x42F IRC source */
u32 irqen[2]; /* 0x430 - 0x437 IRQ enabled */
u32 irqstat[2]; /* 0x438 - 0x43F - IRQ access only */
u32 reserved[1776];
u32 sram[2048]; /* 0x2000 - 0x3FFF - config and buffer */
};
void qmgr_set_irq(unsigned int queue, int src,
void (*handler)(void *pdev), void *pdev);
void qmgr_enable_irq(unsigned int queue);
void qmgr_disable_irq(unsigned int queue);
/* request_ and release_queue() must be called from non-IRQ context */
#if DEBUG_QMGR
extern char qmgr_queue_descs[QUEUES][32];
int qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
unsigned int nearly_empty_watermark,
unsigned int nearly_full_watermark,
const char *desc_format, const char* name);
#else
int __qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
unsigned int nearly_empty_watermark,
unsigned int nearly_full_watermark);
#define qmgr_request_queue(queue, len, nearly_empty_watermark, \
nearly_full_watermark, desc_format, name) \
__qmgr_request_queue(queue, len, nearly_empty_watermark, \
nearly_full_watermark)
#endif
void qmgr_release_queue(unsigned int queue);
static inline void qmgr_put_entry(unsigned int queue, u32 val)
{
extern struct qmgr_regs __iomem *qmgr_regs;
#if DEBUG_QMGR
BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
printk(KERN_DEBUG "Queue %s(%i) put %X\n",
qmgr_queue_descs[queue], queue, val);
#endif
__raw_writel(val, &qmgr_regs->acc[queue][0]);
}
static inline u32 qmgr_get_entry(unsigned int queue)
{
u32 val;
extern struct qmgr_regs __iomem *qmgr_regs;
val = __raw_readl(&qmgr_regs->acc[queue][0]);
#if DEBUG_QMGR
BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
printk(KERN_DEBUG "Queue %s(%i) get %X\n",
qmgr_queue_descs[queue], queue, val);
#endif
return val;
}
static inline int __qmgr_get_stat1(unsigned int queue)
{
extern struct qmgr_regs __iomem *qmgr_regs;
return (__raw_readl(&qmgr_regs->stat1[queue >> 3])
>> ((queue & 7) << 2)) & 0xF;
}
static inline int __qmgr_get_stat2(unsigned int queue)
{
extern struct qmgr_regs __iomem *qmgr_regs;
BUG_ON(queue >= HALF_QUEUES);
return (__raw_readl(&qmgr_regs->stat2[queue >> 4])
>> ((queue & 0xF) << 1)) & 0x3;
}
/**
* qmgr_stat_empty() - checks if a hardware queue is empty
* @queue: queue number
*
* Returns non-zero value if the queue is empty.
*/
static inline int qmgr_stat_empty(unsigned int queue)
{
BUG_ON(queue >= HALF_QUEUES);
return __qmgr_get_stat1(queue) & QUEUE_STAT1_EMPTY;
}
/**
* qmgr_stat_empty() - checks if a hardware queue is nearly empty
* @queue: queue number
*
* Returns non-zero value if the queue is nearly or completely empty.
*/
static inline int qmgr_stat_nearly_empty(unsigned int queue)
{
extern struct qmgr_regs __iomem *qmgr_regs;
if (queue >= HALF_QUEUES)
return (__raw_readl(&qmgr_regs->statne_h) >>
(queue - HALF_QUEUES)) & 0x01;
return __qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_EMPTY;
}
/**
* qmgr_stat_empty() - checks if a hardware queue is nearly full
* @queue: queue number
*
* Returns non-zero value if the queue is nearly or completely full.
*/
static inline int qmgr_stat_nearly_full(unsigned int queue)
{
BUG_ON(queue >= HALF_QUEUES);
return __qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_FULL;
}
/**
* qmgr_stat_empty() - checks if a hardware queue is full
* @queue: queue number
*
* Returns non-zero value if the queue is full.
*/
static inline int qmgr_stat_full(unsigned int queue)
{
extern struct qmgr_regs __iomem *qmgr_regs;
if (queue >= HALF_QUEUES)
return (__raw_readl(&qmgr_regs->statf_h) >>
(queue - HALF_QUEUES)) & 0x01;
return __qmgr_get_stat1(queue) & QUEUE_STAT1_FULL;
}
/**
* qmgr_stat_empty() - checks if a hardware queue experienced underflow
* @queue: queue number
*
* Returns non-zero value if empty.
*/
static inline int qmgr_stat_underflow(unsigned int queue)
{
return __qmgr_get_stat2(queue) & QUEUE_STAT2_UNDERFLOW;
}
/**
* qmgr_stat_empty() - checks if a hardware queue experienced overflow
* @queue: queue number
*
* Returns non-zero value if empty.
*/
static inline int qmgr_stat_overflow(unsigned int queue)
{
return __qmgr_get_stat2(queue) & QUEUE_STAT2_OVERFLOW;
}
#endif
|
