Contributors: 13
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Linda Xie |
191 |
48.23% |
4 |
14.81% |
| Linas Vepstas |
139 |
35.10% |
7 |
25.93% |
| John Rose |
29 |
7.32% |
4 |
14.81% |
| Paul Mackerras |
12 |
3.03% |
1 |
3.70% |
| Harvey Harrison |
7 |
1.77% |
1 |
3.70% |
| Tim Schmielau |
3 |
0.76% |
1 |
3.70% |
| Björn Helgaas |
3 |
0.76% |
2 |
7.41% |
| David Gibson |
3 |
0.76% |
1 |
3.70% |
| Olof Johansson |
3 |
0.76% |
1 |
3.70% |
| Gavin Shan |
2 |
0.51% |
2 |
7.41% |
| Rob Herring |
2 |
0.51% |
1 |
3.70% |
| Kristen Carlson Accardi |
1 |
0.25% |
1 |
3.70% |
| Lukas Wunner |
1 |
0.25% |
1 |
3.70% |
| Total |
396 |
|
27 |
|
// SPDX-License-Identifier: GPL-2.0+
/*
* PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
* Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
*
* All rights reserved.
*
* Send feedback to <lxie@us.ibm.com>
*
*/
#include <linux/pci.h>
#include <linux/string.h>
#include <asm/pci-bridge.h>
#include <asm/rtas.h>
#include <asm/machdep.h>
#include "../pci.h" /* for pci_add_new_bus */
#include "rpaphp.h"
int rpaphp_get_sensor_state(struct slot *slot, int *state)
{
int rc;
int setlevel;
rc = rtas_get_sensor(DR_ENTITY_SENSE, slot->index, state);
if (rc < 0) {
if (rc == -EFAULT || rc == -EEXIST) {
dbg("%s: slot must be power up to get sensor-state\n",
__func__);
/* some slots have to be powered up
* before get-sensor will succeed.
*/
rc = rtas_set_power_level(slot->power_domain, POWER_ON,
&setlevel);
if (rc < 0) {
dbg("%s: power on slot[%s] failed rc=%d.\n",
__func__, slot->name, rc);
} else {
rc = rtas_get_sensor(DR_ENTITY_SENSE,
slot->index, state);
}
} else if (rc == -ENODEV)
info("%s: slot is unusable\n", __func__);
else
err("%s failed to get sensor state\n", __func__);
}
return rc;
}
/**
* rpaphp_enable_slot - record slot state, config pci device
* @slot: target &slot
*
* Initialize values in the slot structure to indicate if there is a pci card
* plugged into the slot. If the slot is not empty, run the pcibios routine
* to get pcibios stuff correctly set up.
*/
int rpaphp_enable_slot(struct slot *slot)
{
int rc, level, state;
struct pci_bus *bus;
slot->state = EMPTY;
/* Find out if the power is turned on for the slot */
rc = rtas_get_power_level(slot->power_domain, &level);
if (rc)
return rc;
/* Figure out if there is an adapter in the slot */
rc = rpaphp_get_sensor_state(slot, &state);
if (rc)
return rc;
bus = pci_find_bus_by_node(slot->dn);
if (!bus) {
err("%s: no pci_bus for dn %pOF\n", __func__, slot->dn);
return -EINVAL;
}
slot->bus = bus;
slot->pci_devs = &bus->devices;
/* if there's an adapter in the slot, go add the pci devices */
if (state == PRESENT) {
slot->state = NOT_CONFIGURED;
/* non-empty slot has to have child */
if (!slot->dn->child) {
err("%s: slot[%s]'s device_node doesn't have child for adapter\n",
__func__, slot->name);
return -EINVAL;
}
if (list_empty(&bus->devices))
pci_hp_add_devices(bus);
if (!list_empty(&bus->devices)) {
slot->state = CONFIGURED;
}
if (rpaphp_debug) {
struct pci_dev *dev;
dbg("%s: pci_devs of slot[%pOF]\n", __func__, slot->dn);
list_for_each_entry(dev, &bus->devices, bus_list)
dbg("\t%s\n", pci_name(dev));
}
}
return 0;
}