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
|
/* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __FSL_BMAN_H
#define __FSL_BMAN_H
/* wrapper for 48-bit buffers */
struct bm_buffer {
union {
struct {
__be16 bpid; /* hi 8-bits reserved */
__be16 hi; /* High 16-bits of 48-bit address */
__be32 lo; /* Low 32-bits of 48-bit address */
};
__be64 data;
};
} __aligned(8);
/*
* Restore the 48 bit address previously stored in BMan
* hardware pools as a dma_addr_t
*/
static inline dma_addr_t bm_buf_addr(const struct bm_buffer *buf)
{
return be64_to_cpu(buf->data) & 0xffffffffffffLLU;
}
static inline u64 bm_buffer_get64(const struct bm_buffer *buf)
{
return be64_to_cpu(buf->data) & 0xffffffffffffLLU;
}
static inline void bm_buffer_set64(struct bm_buffer *buf, u64 addr)
{
buf->hi = cpu_to_be16(upper_32_bits(addr));
buf->lo = cpu_to_be32(lower_32_bits(addr));
}
static inline u8 bm_buffer_get_bpid(const struct bm_buffer *buf)
{
return be16_to_cpu(buf->bpid) & 0xff;
}
static inline void bm_buffer_set_bpid(struct bm_buffer *buf, int bpid)
{
buf->bpid = cpu_to_be16(bpid & 0xff);
}
/* Managed portal, high-level i/face */
/* Portal and Buffer Pools */
struct bman_portal;
struct bman_pool;
#define BM_POOL_MAX 64 /* max # of buffer pools */
/**
* bman_new_pool - Allocates a Buffer Pool object
*
* Creates a pool object, and returns a reference to it or NULL on error.
*/
struct bman_pool *bman_new_pool(void);
#ifdef __rtems__
struct bman_pool *bman_new_pool_for_bpid(u8 bpid);
#endif /* __rtems__ */
/**
* bman_free_pool - Deallocates a Buffer Pool object
* @pool: the pool object to release
*/
void bman_free_pool(struct bman_pool *pool);
/**
* bman_get_bpid - Returns a pool object's BPID.
* @pool: the pool object
*
* The returned value is the index of the encapsulated buffer pool,
* in the range of [0, @BM_POOL_MAX-1].
*/
int bman_get_bpid(const struct bman_pool *pool);
/**
* bman_release - Release buffer(s) to the buffer pool
* @pool: the buffer pool object to release to
* @bufs: an array of buffers to release
* @num: the number of buffers in @bufs (1-8)
*
* Adds the given buffers to RCR entries. If the RCR ring is unresponsive,
* the function will return -ETIMEDOUT. Otherwise, it returns zero.
*/
int bman_release(struct bman_pool *pool, const struct bm_buffer *bufs, u8 num);
/**
* bman_acquire - Acquire buffer(s) from a buffer pool
* @pool: the buffer pool object to acquire from
* @bufs: array for storing the acquired buffers
* @num: the number of buffers desired (@bufs is at least this big)
*
* Issues an "Acquire" command via the portal's management command interface.
* The return value will be the number of buffers obtained from the pool, or a
* negative error code if a h/w error or pool starvation was encountered. In
* the latter case, the content of @bufs is undefined.
*/
int bman_acquire(struct bman_pool *pool, struct bm_buffer *bufs, u8 num);
#endif /* __FSL_BMAN_H */
|
