blob: c4317c452d98e706896e7aa6bac87464716849c6 (
plain)
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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* The file intends to implement dynamic creation of EEH device, which will
* be bound with OF node and PCI device simutaneously. The EEH devices would
* be foundamental information for EEH core components to work proerly. Besides,
* We have to support multiple situations where dynamic creation of EEH device
* is required:
*
* 1) Before PCI emunation starts, we need create EEH devices according to the
* PCI sensitive OF nodes.
* 2) When PCI emunation is done, we need do the binding between PCI device and
* the associated EEH device.
* 3) DR (Dynamic Reconfiguration) would create PCI sensitive OF node. EEH device
* will be created while PCI sensitive OF node is detected from DR.
* 4) PCI hotplug needs redoing the binding between PCI device and EEH device. If
* PHB is newly inserted, we also need create EEH devices accordingly.
*
* Copyright Benjamin Herrenschmidt & Gavin Shan, IBM Corporation 2012.
*/
#include <linux/export.h>
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <asm/pci-bridge.h>
#include <asm/ppc-pci.h>
/**
* eeh_dev_init - Create EEH device according to OF node
* @pdn: PCI device node
*
* It will create EEH device according to the given OF node. The function
* might be called by PCI emunation, DR, PHB hotplug.
*/
struct eeh_dev *eeh_dev_init(struct pci_dn *pdn)
{
struct eeh_dev *edev;
/* Allocate EEH device */
edev = kzalloc(sizeof(*edev), GFP_KERNEL);
if (!edev)
return NULL;
/* Associate EEH device with OF node */
pdn->edev = edev;
edev->pdn = pdn;
return edev;
}
/**
* eeh_dev_phb_init_dynamic - Create EEH devices for devices included in PHB
* @phb: PHB
*
* Scan the PHB OF node and its child association, then create the
* EEH devices accordingly
*/
void eeh_dev_phb_init_dynamic(struct pci_controller *phb)
{
/* EEH PE for PHB */
eeh_phb_pe_create(phb);
}
|
