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30#include <linux/module.h>
31#include <linux/kernel.h>
32#include <linux/types.h>
33#include <linux/pci.h>
34#include "../pci.h"
35#include "pciehp.h"
36
37int pciehp_configure_device(struct slot *p_slot)
38{
39 struct pci_dev *dev;
40 struct pci_dev *bridge = p_slot->ctrl->pcie->port;
41 struct pci_bus *parent = bridge->subordinate;
42 int num;
43 struct controller *ctrl = p_slot->ctrl;
44
45 dev = pci_get_slot(parent, PCI_DEVFN(0, 0));
46 if (dev) {
47 ctrl_err(ctrl, "Device %s already exists "
48 "at %04x:%02x:00, cannot hot-add\n", pci_name(dev),
49 pci_domain_nr(parent), parent->number);
50 pci_dev_put(dev);
51 return -EINVAL;
52 }
53
54 num = pci_scan_slot(parent, PCI_DEVFN(0, 0));
55 if (num == 0) {
56 ctrl_err(ctrl, "No new device found\n");
57 return -ENODEV;
58 }
59
60 list_for_each_entry(dev, &parent->devices, bus_list)
61 if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
62 (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS))
63 pci_hp_add_bridge(dev);
64
65 pci_assign_unassigned_bridge_resources(bridge);
66
67 list_for_each_entry(dev, &parent->devices, bus_list) {
68 if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY)
69 continue;
70
71 pci_configure_slot(dev);
72 }
73
74 pci_bus_add_devices(parent);
75
76 return 0;
77}
78
79int pciehp_unconfigure_device(struct slot *p_slot)
80{
81 int ret, rc = 0;
82 u8 bctl = 0;
83 u8 presence = 0;
84 struct pci_dev *dev, *temp;
85 struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate;
86 u16 command;
87 struct controller *ctrl = p_slot->ctrl;
88
89 ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:00\n",
90 __func__, pci_domain_nr(parent), parent->number);
91 ret = pciehp_get_adapter_status(p_slot, &presence);
92 if (ret)
93 presence = 0;
94
95
96
97
98
99
100
101 list_for_each_entry_safe_reverse(dev, temp, &parent->devices,
102 bus_list) {
103 pci_dev_get(dev);
104 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && presence) {
105 pci_read_config_byte(dev, PCI_BRIDGE_CONTROL, &bctl);
106 if (bctl & PCI_BRIDGE_CTL_VGA) {
107 ctrl_err(ctrl,
108 "Cannot remove display device %s\n",
109 pci_name(dev));
110 pci_dev_put(dev);
111 rc = -EINVAL;
112 break;
113 }
114 }
115 pci_stop_and_remove_bus_device(dev);
116
117
118
119
120 if (presence) {
121 pci_read_config_word(dev, PCI_COMMAND, &command);
122 command &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_SERR);
123 command |= PCI_COMMAND_INTX_DISABLE;
124 pci_write_config_word(dev, PCI_COMMAND, command);
125 }
126 pci_dev_put(dev);
127 }
128
129 return rc;
130}
131