Zephyr API Documentation
4.0.99
A Scalable Open Source RTOS
Loading...
Searching...
No Matches
pcie.h
Go to the documentation of this file.
1
/*
2
* Copyright (c) 2019 Intel Corporation
3
*
4
* SPDX-License-Identifier: Apache-2.0
5
*/
6
7
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_PCIE_PCIE_H_
8
#define ZEPHYR_INCLUDE_DT_BINDINGS_PCIE_PCIE_H_
9
10
/*
11
* Set the device's IRQ (in devicetree, or whatever) to PCIE_IRQ_DETECT
12
* if the device doesn't support MSI and we don't/can't know the wired IRQ
13
* allocated by the firmware ahead of time. Use of this functionality will
14
* generally also require CONFIG_DYNAMIC_INTERRUPTS.
15
*/
16
17
#define PCIE_IRQ_DETECT 0xFFFFFFFU
18
19
/*
20
* We represent a PCI device ID as [31:16] device ID, [15:0] vendor ID. Not
21
* coincidentally, this is same representation used in PCI configuration space.
22
*/
23
24
#define PCIE_ID_VEND_SHIFT 0U
25
#define PCIE_ID_VEND_MASK 0xFFFFU
26
#define PCIE_ID_DEV_SHIFT 16U
27
#define PCIE_ID_DEV_MASK 0xFFFFU
28
29
#ifdef __DTS__
30
#define CAST(type, v) (v)
31
#else
32
#define CAST(type, v) ((type)(v))
33
#endif
34
35
#define PCIE_ID(vend, dev) \
36
((((vend) & PCIE_ID_VEND_MASK) << PCIE_ID_VEND_SHIFT) | \
37
(CAST(uint32_t, (dev) & PCIE_ID_DEV_MASK) << PCIE_ID_DEV_SHIFT))
38
39
#define PCIE_ID_TO_VEND(id) (((id) >> PCIE_ID_VEND_SHIFT) & PCIE_ID_VEND_MASK)
40
#define PCIE_ID_TO_DEV(id) (((id) >> PCIE_ID_DEV_SHIFT) & PCIE_ID_DEV_MASK)
41
42
#define PCIE_ID_NONE PCIE_ID(0xFFFF, 0xFFFF)
43
44
#define PCIE_BDF_NONE 0xFFFFFFFFU
45
46
/*
47
* Since our internal representation of bus/device/function is arbitrary,
48
* we choose the same format employed in the x86 Configuration Address Port:
49
*
50
* [23:16] bus number, [15:11] device number, [10:8] function number
51
*
52
* All other bits must be zero.
53
*
54
* The x86 (the only arch, at present, that supports PCI) takes advantage
55
* of this shared format to avoid unnecessary layers of abstraction.
56
*/
57
58
#define PCIE_BDF_BUS_SHIFT 16U
59
#define PCIE_BDF_BUS_MASK 0xFFU
60
#define PCIE_BDF_DEV_SHIFT 11U
61
#define PCIE_BDF_DEV_MASK 0x1FU
62
#define PCIE_BDF_FUNC_SHIFT 8U
63
#define PCIE_BDF_FUNC_MASK 0x7U
64
65
#define PCIE_BDF(bus, dev, func) \
66
((((bus) & PCIE_BDF_BUS_MASK) << PCIE_BDF_BUS_SHIFT) | \
67
(((dev) & PCIE_BDF_DEV_MASK) << PCIE_BDF_DEV_SHIFT) | \
68
(((func) & PCIE_BDF_FUNC_MASK) << PCIE_BDF_FUNC_SHIFT))
69
70
#define PCIE_BDF_TO_BUS(bdf) (((bdf) >> PCIE_BDF_BUS_SHIFT) & PCIE_BDF_BUS_MASK)
71
#define PCIE_BDF_TO_DEV(bdf) (((bdf) >> PCIE_BDF_DEV_SHIFT) & PCIE_BDF_DEV_MASK)
72
73
#define PCIE_BDF_TO_FUNC(bdf) \
74
(((bdf) >> PCIE_BDF_FUNC_SHIFT) & PCIE_BDF_FUNC_MASK)
75
76
#endif
/* ZEPHYR_INCLUDE_DT_BINDINGS_PCIE_PCIE_H_ */
zephyr
dt-bindings
pcie
pcie.h
Generated on Mon Nov 18 2024 06:02:27 for Zephyr API Documentation by
1.12.0