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
|
/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the project nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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 _PCI_BAR_H_
#define _PCI_BAR_H_ 1
#include <sys/types.h>
#include <sys/cdefs.h>
#include <os/bus.h>
#include <io/pci/pci.h>
#include <io/pci/cam.h>
/*
* Convert a BAR number to BAR register offset
*
* @bar: Bar number
*
* Returns a register offset of the desired BAR on success,
* otherwise a value of 0 to indicate failure
*/
__always_inline static inline uint8_t
pci_get_barreg(uint8_t bar)
{
switch (bar) {
case 0: return PCIREG_BAR0;
case 1: return PCIREG_BAR1;
case 2: return PCIREG_BAR2;
case 3: return PCIREG_BAR3;
case 4: return PCIREG_BAR4;
case 5: return PCIREG_BAR5;
default: return 0;
}
}
/*
* Get the number of bytes a BAR region covers
*
* @dev: Device of BAR to check
* @bar: BAR number of BAR to check
*
* Returns the number of bytes the BAR region spans on success,
* otherwise a less than zero value on failure.
*/
ssize_t pci_bar_size(struct pci_device *dev, uint8_t bar);
/*
* Map a BAR into host address space for the current
* process.
*
* @dev: Device of BAR to map
* @bar: BAR number of BAR to map
* @bs_res: Result is written here
*
* Returns zero on success, otherwise a less than
* zero value to indicate failure.
*/
int pci_map_bar(struct pci_device *dev, uint8_t bar, struct bus_space *bs_res);
#endif /* !_PCI_BAR_H_ */
|
