Release 4.7 drivers/pci/hotplug/s390_pci_hpc.c
/*
* PCI Hot Plug Controller Driver for System z
*
* Copyright 2012 IBM Corp.
*
* Author(s):
* Jan Glauber <jang@linux.vnet.ibm.com>
*/
#define KMSG_COMPONENT "zpci"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <asm/pci_debug.h>
#include <asm/sclp.h>
#define SLOT_NAME_SIZE 10
static LIST_HEAD(s390_hotplug_slot_list);
MODULE_AUTHOR("Jan Glauber <jang@linux.vnet.ibm.com");
MODULE_DESCRIPTION("Hot Plug PCI Controller for System z");
MODULE_LICENSE("GPL");
static int zpci_fn_configured(enum zpci_state state)
{
return state == ZPCI_FN_STATE_CONFIGURED ||
state == ZPCI_FN_STATE_ONLINE;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan glauber | jan glauber | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
/*
* struct slot - slot information for each *physical* slot
*/
struct slot {
struct list_head slot_list;
struct hotplug_slot *hotplug_slot;
struct zpci_dev *zdev;
};
static inline int slot_configure(struct slot *slot)
{
int ret = sclp_pci_configure(slot->zdev->fid);
zpci_dbg(3, "conf fid:%x, rc:%d\n", slot->zdev->fid, ret);
if (!ret)
slot->zdev->state = ZPCI_FN_STATE_CONFIGURED;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| sebastian ott | sebastian ott | 55 | 100.00% | 1 | 100.00% |
| Total | 55 | 100.00% | 1 | 100.00% |
static inline int slot_deconfigure(struct slot *slot)
{
int ret = sclp_pci_deconfigure(slot->zdev->fid);
zpci_dbg(3, "deconf fid:%x, rc:%d\n", slot->zdev->fid, ret);
if (!ret)
slot->zdev->state = ZPCI_FN_STATE_STANDBY;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| sebastian ott | sebastian ott | 55 | 100.00% | 1 | 100.00% |
| Total | 55 | 100.00% | 1 | 100.00% |
static int enable_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = hotplug_slot->private;
int rc;
if (slot->zdev->state != ZPCI_FN_STATE_STANDBY)
return -EIO;
rc = slot_configure(slot);
if (rc)
return rc;
rc = zpci_enable_device(slot->zdev);
if (rc)
goto out_deconfigure;
pci_scan_slot(slot->zdev->bus, ZPCI_DEVFN);
pci_lock_rescan_remove();
pci_bus_add_devices(slot->zdev->bus);
pci_unlock_rescan_remove();
return rc;
out_deconfigure:
slot_deconfigure(slot);
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan glauber | jan glauber | 62 | 58.49% | 1 | 25.00% |
| sebastian ott | sebastian ott | 38 | 35.85% | 2 | 50.00% |
| rafael j. wysocki | rafael j. wysocki | 6 | 5.66% | 1 | 25.00% |
| Total | 106 | 100.00% | 4 | 100.00% |
static int disable_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = hotplug_slot->private;
struct pci_dev *pdev;
int rc;
if (!zpci_fn_configured(slot->zdev->state))
return -EIO;
pdev = pci_get_slot(slot->zdev->bus, ZPCI_DEVFN);
if (pdev) {
pci_stop_and_remove_bus_device_locked(pdev);
pci_dev_put(pdev);
}
rc = zpci_disable_device(slot->zdev);
if (rc)
return rc;
return slot_deconfigure(slot);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| sebastian ott | sebastian ott | 51 | 53.68% | 4 | 66.67% |
| jan glauber | jan glauber | 43 | 45.26% | 1 | 16.67% |
| rafael j. wysocki | rafael j. wysocki | 1 | 1.05% | 1 | 16.67% |
| Total | 95 | 100.00% | 6 | 100.00% |
static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
switch (slot->zdev->state) {
case ZPCI_FN_STATE_STANDBY:
*value = 0;
break;
default:
*value = 1;
break;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan glauber | jan glauber | 53 | 100.00% | 1 | 100.00% |
| Total | 53 | 100.00% | 1 | 100.00% |
static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
/* if the slot exits it always contains a function */
*value = 1;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan glauber | jan glauber | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static void release_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = hotplug_slot->private;
kfree(slot->hotplug_slot->info);
kfree(slot->hotplug_slot);
kfree(slot);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan glauber | jan glauber | 41 | 100.00% | 1 | 100.00% |
| Total | 41 | 100.00% | 1 | 100.00% |
static struct hotplug_slot_ops s390_hotplug_slot_ops = {
.enable_slot = enable_slot,
.disable_slot = disable_slot,
.get_power_status = get_power_status,
.get_adapter_status = get_adapter_status,
};
int zpci_init_slot(struct zpci_dev *zdev)
{
struct hotplug_slot *hotplug_slot;
struct hotplug_slot_info *info;
char name[SLOT_NAME_SIZE];
struct slot *slot;
int rc;
if (!zdev)
return 0;
slot = kzalloc(sizeof(*slot), GFP_KERNEL);
if (!slot)
goto error;
hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
if (!hotplug_slot)
goto error_hp;
hotplug_slot->private = slot;
slot->hotplug_slot = hotplug_slot;
slot->zdev = zdev;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
goto error_info;
hotplug_slot->info = info;
hotplug_slot->ops = &s390_hotplug_slot_ops;
hotplug_slot->release = &release_slot;
get_power_status(hotplug_slot, &info->power_status);
get_adapter_status(hotplug_slot, &info->adapter_status);
snprintf(name, SLOT_NAME_SIZE, "%08x", zdev->fid);
rc = pci_hp_register(slot->hotplug_slot, zdev->bus,
ZPCI_DEVFN, name);
if (rc)
goto error_reg;
list_add(&slot->slot_list, &s390_hotplug_slot_list);
return 0;
error_reg:
kfree(info);
error_info:
kfree(hotplug_slot);
error_hp:
kfree(slot);
error:
return -ENOMEM;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan glauber | jan glauber | 240 | 99.59% | 1 | 50.00% |
| sebastian ott | sebastian ott | 1 | 0.41% | 1 | 50.00% |
| Total | 241 | 100.00% | 2 | 100.00% |
void zpci_exit_slot(struct zpci_dev *zdev)
{
struct slot *slot, *next;
list_for_each_entry_safe(slot, next, &s390_hotplug_slot_list,
slot_list) {
if (slot->zdev != zdev)
continue;
list_del(&slot->slot_list);
pci_hp_deregister(slot->hotplug_slot);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan glauber | jan glauber | 45 | 83.33% | 1 | 33.33% |
| geliang tang | geliang tang | 8 | 14.81% | 1 | 33.33% |
| sebastian ott | sebastian ott | 1 | 1.85% | 1 | 33.33% |
| Total | 54 | 100.00% | 3 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan glauber | jan glauber | 626 | 73.82% | 1 | 10.00% |
| sebastian ott | sebastian ott | 204 | 24.06% | 6 | 60.00% |
| geliang tang | geliang tang | 8 | 0.94% | 1 | 10.00% |
| rafael j. wysocki | rafael j. wysocki | 7 | 0.83% | 1 | 10.00% |
| gerald schaefer | gerald schaefer | 3 | 0.35% | 1 | 10.00% |
| Total | 848 | 100.00% | 10 | 100.00% |
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