Release 4.16 drivers/pci/hotplug/pciehp_pci.c
// SPDX-License-Identifier: GPL-2.0+
/*
* PCI Express Hot Plug Controller Driver
*
* Copyright (C) 1995,2001 Compaq Computer Corporation
* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2001 IBM Corp.
* Copyright (C) 2003-2004 Intel Corporation
*
* All rights reserved.
*
* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "../pci.h"
#include "pciehp.h"
int pciehp_configure_device(struct slot *p_slot)
{
struct pci_dev *dev;
struct pci_dev *bridge = p_slot->ctrl->pcie->port;
struct pci_bus *parent = bridge->subordinate;
int num, ret = 0;
struct controller *ctrl = p_slot->ctrl;
pci_lock_rescan_remove();
dev = pci_get_slot(parent, PCI_DEVFN(0, 0));
if (dev) {
/*
* The device is already there. Either configured by the
* boot firmware or a previous hotplug event.
*/
ctrl_dbg(ctrl, "Device %s already exists at %04x:%02x:00, skipping hot-add\n",
pci_name(dev), pci_domain_nr(parent), parent->number);
pci_dev_put(dev);
ret = -EEXIST;
goto out;
}
num = pci_scan_slot(parent, PCI_DEVFN(0, 0));
if (num == 0) {
ctrl_err(ctrl, "No new device found\n");
ret = -ENODEV;
goto out;
}
for_each_pci_bridge(dev, parent)
pci_hp_add_bridge(dev);
pci_assign_unassigned_bridge_resources(bridge);
pcie_bus_configure_settings(parent);
pci_bus_add_devices(parent);
out:
pci_unlock_rescan_remove();
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dely Sy | 55 | 30.22% | 1 | 6.25% |
| Rajesh Shah | 45 | 24.73% | 1 | 6.25% |
| Rafael J. Wysocki | 25 | 13.74% | 1 | 6.25% |
| Taku Izumi | 19 | 10.44% | 2 | 12.50% |
| Yinghai Lu | 15 | 8.24% | 2 | 12.50% |
| Kenji Kaneshige | 14 | 7.69% | 4 | 25.00% |
| Mika Westerberg | 3 | 1.65% | 1 | 6.25% |
| Andy Shevchenko | 2 | 1.10% | 1 | 6.25% |
| Björn Helgaas | 2 | 1.10% | 1 | 6.25% |
| Yijing Wang | 2 | 1.10% | 2 | 12.50% |
| Total | 182 | 100.00% | 16 | 100.00% |
int pciehp_unconfigure_device(struct slot *p_slot)
{
int rc = 0;
u8 presence = 0;
struct pci_dev *dev, *temp;
struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate;
u16 command;
struct controller *ctrl = p_slot->ctrl;
ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:00\n",
__func__, pci_domain_nr(parent), parent->number);
pciehp_get_adapter_status(p_slot, &presence);
pci_lock_rescan_remove();
/*
* Stopping an SR-IOV PF device removes all the associated VFs,
* which will update the bus->devices list and confuse the
* iterator. Therefore, iterate in reverse so we remove the VFs
* first, then the PF. We do the same in pci_stop_bus_device().
*/
list_for_each_entry_safe_reverse(dev, temp, &parent->devices,
bus_list) {
pci_dev_get(dev);
if (!presence) {
pci_dev_set_disconnected(dev, NULL);
if (pci_has_subordinate(dev))
pci_walk_bus(dev->subordinate,
pci_dev_set_disconnected, NULL);
}
pci_stop_and_remove_bus_device(dev);
/*
* Ensure that no new Requests will be generated from
* the device.
*/
if (presence) {
pci_read_config_word(dev, PCI_COMMAND, &command);
command &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_SERR);
command |= PCI_COMMAND_INTX_DISABLE;
pci_write_config_word(dev, PCI_COMMAND, command);
}
pci_dev_put(dev);
}
pci_unlock_rescan_remove();
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Kenji Kaneshige | 72 | 38.10% | 6 | 35.29% |
| Keith Busch | 30 | 15.87% | 1 | 5.88% |
| Dely Sy | 28 | 14.81% | 1 | 5.88% |
| Yijing Wang | 22 | 11.64% | 1 | 5.88% |
| Taku Izumi | 17 | 8.99% | 2 | 11.76% |
| Rajesh Shah | 6 | 3.17% | 1 | 5.88% |
| Rafael J. Wysocki | 6 | 3.17% | 1 | 5.88% |
| Kristen Carlson Accardi | 4 | 2.12% | 1 | 5.88% |
| Yinghai Lu | 3 | 1.59% | 2 | 11.76% |
| Harvey Harrison | 1 | 0.53% | 1 | 5.88% |
| Total | 189 | 100.00% | 17 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dely Sy | 101 | 25.83% | 1 | 4.00% |
| Kenji Kaneshige | 86 | 21.99% | 6 | 24.00% |
| Rajesh Shah | 51 | 13.04% | 2 | 8.00% |
| Taku Izumi | 36 | 9.21% | 2 | 8.00% |
| Rafael J. Wysocki | 31 | 7.93% | 1 | 4.00% |
| Keith Busch | 30 | 7.67% | 1 | 4.00% |
| Yijing Wang | 24 | 6.14% | 2 | 8.00% |
| Yinghai Lu | 18 | 4.60% | 4 | 16.00% |
| Björn Helgaas | 4 | 1.02% | 2 | 8.00% |
| Kristen Carlson Accardi | 4 | 1.02% | 1 | 4.00% |
| Mika Westerberg | 3 | 0.77% | 1 | 4.00% |
| Andy Shevchenko | 2 | 0.51% | 1 | 4.00% |
| Harvey Harrison | 1 | 0.26% | 1 | 4.00% |
| Total | 391 | 100.00% | 25 | 100.00% |
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