2 * PCI Express Hot Plug Controller Driver
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2003-2004 Intel Corporation
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
37 int pciehp_configure_device(struct slot
*p_slot
)
40 struct pci_dev
*bridge
= p_slot
->ctrl
->pcie
->port
;
41 struct pci_bus
*parent
= bridge
->subordinate
;
43 struct controller
*ctrl
= p_slot
->ctrl
;
45 pci_lock_rescan_remove();
47 dev
= pci_get_slot(parent
, PCI_DEVFN(0, 0));
49 ctrl_err(ctrl
, "Device %s already exists at %04x:%02x:00, cannot hot-add\n",
50 pci_name(dev
), pci_domain_nr(parent
), parent
->number
);
56 num
= pci_scan_slot(parent
, PCI_DEVFN(0, 0));
58 ctrl_err(ctrl
, "No new device found\n");
63 list_for_each_entry(dev
, &parent
->devices
, bus_list
)
64 if (pci_is_bridge(dev
))
65 pci_hp_add_bridge(dev
);
67 pci_assign_unassigned_bridge_resources(bridge
);
68 pcie_bus_configure_settings(parent
);
69 pci_bus_add_devices(parent
);
72 pci_unlock_rescan_remove();
76 int pciehp_unconfigure_device(struct slot
*p_slot
)
81 struct pci_dev
*dev
, *temp
;
82 struct pci_bus
*parent
= p_slot
->ctrl
->pcie
->port
->subordinate
;
84 struct controller
*ctrl
= p_slot
->ctrl
;
86 ctrl_dbg(ctrl
, "%s: domain:bus:dev = %04x:%02x:00\n",
87 __func__
, pci_domain_nr(parent
), parent
->number
);
88 pciehp_get_adapter_status(p_slot
, &presence
);
90 pci_lock_rescan_remove();
93 * Stopping an SR-IOV PF device removes all the associated VFs,
94 * which will update the bus->devices list and confuse the
95 * iterator. Therefore, iterate in reverse so we remove the VFs
96 * first, then the PF. We do the same in pci_stop_bus_device().
98 list_for_each_entry_safe_reverse(dev
, temp
, &parent
->devices
,
101 if (dev
->hdr_type
== PCI_HEADER_TYPE_BRIDGE
&& presence
) {
102 pci_read_config_byte(dev
, PCI_BRIDGE_CONTROL
, &bctl
);
103 if (bctl
& PCI_BRIDGE_CTL_VGA
) {
105 "Cannot remove display device %s\n",
112 pci_stop_and_remove_bus_device(dev
);
114 * Ensure that no new Requests will be generated from
118 pci_read_config_word(dev
, PCI_COMMAND
, &command
);
119 command
&= ~(PCI_COMMAND_MASTER
| PCI_COMMAND_SERR
);
120 command
|= PCI_COMMAND_INTX_DISABLE
;
121 pci_write_config_word(dev
, PCI_COMMAND
, command
);
126 pci_unlock_rescan_remove();
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