mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 20:16:41 +07:00
c7b4fee380
The pciehp driver waits for 1000 msec after turning power off to make sure the power has been completely removed. But this 1000 msec wait is not needed if a slot doesn't implement power control because software cannot control the power. Power will be automatically removed at adapter removal time on such a slot Tested-by: "Phil Endecott" <phil_pibbu_endecott@chezphil.org> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
695 lines
17 KiB
C
695 lines
17 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* 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/smp_lock.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/workqueue.h>
|
|
#include "../pci.h"
|
|
#include "pciehp.h"
|
|
|
|
static void interrupt_event_handler(struct work_struct *work);
|
|
|
|
static int queue_interrupt_event(struct slot *p_slot, u32 event_type)
|
|
{
|
|
struct event_info *info;
|
|
|
|
info = kmalloc(sizeof(*info), GFP_ATOMIC);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->event_type = event_type;
|
|
info->p_slot = p_slot;
|
|
INIT_WORK(&info->work, interrupt_event_handler);
|
|
|
|
schedule_work(&info->work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
u8 pciehp_handle_attention_button(struct slot *p_slot)
|
|
{
|
|
u32 event_type;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
/* Attention Button Change */
|
|
ctrl_dbg(ctrl, "Attention button interrupt received\n");
|
|
|
|
/*
|
|
* Button pressed - See if need to TAKE ACTION!!!
|
|
*/
|
|
ctrl_info(ctrl, "Button pressed on Slot(%s)\n", slot_name(p_slot));
|
|
event_type = INT_BUTTON_PRESS;
|
|
|
|
queue_interrupt_event(p_slot, event_type);
|
|
|
|
return 0;
|
|
}
|
|
|
|
u8 pciehp_handle_switch_change(struct slot *p_slot)
|
|
{
|
|
u8 getstatus;
|
|
u32 event_type;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
/* Switch Change */
|
|
ctrl_dbg(ctrl, "Switch interrupt received\n");
|
|
|
|
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
if (getstatus) {
|
|
/*
|
|
* Switch opened
|
|
*/
|
|
ctrl_info(ctrl, "Latch open on Slot(%s)\n", slot_name(p_slot));
|
|
event_type = INT_SWITCH_OPEN;
|
|
} else {
|
|
/*
|
|
* Switch closed
|
|
*/
|
|
ctrl_info(ctrl, "Latch close on Slot(%s)\n", slot_name(p_slot));
|
|
event_type = INT_SWITCH_CLOSE;
|
|
}
|
|
|
|
queue_interrupt_event(p_slot, event_type);
|
|
|
|
return 1;
|
|
}
|
|
|
|
u8 pciehp_handle_presence_change(struct slot *p_slot)
|
|
{
|
|
u32 event_type;
|
|
u8 presence_save;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
/* Presence Change */
|
|
ctrl_dbg(ctrl, "Presence/Notify input change\n");
|
|
|
|
/* Switch is open, assume a presence change
|
|
* Save the presence state
|
|
*/
|
|
p_slot->hpc_ops->get_adapter_status(p_slot, &presence_save);
|
|
if (presence_save) {
|
|
/*
|
|
* Card Present
|
|
*/
|
|
ctrl_info(ctrl, "Card present on Slot(%s)\n", slot_name(p_slot));
|
|
event_type = INT_PRESENCE_ON;
|
|
} else {
|
|
/*
|
|
* Not Present
|
|
*/
|
|
ctrl_info(ctrl, "Card not present on Slot(%s)\n",
|
|
slot_name(p_slot));
|
|
event_type = INT_PRESENCE_OFF;
|
|
}
|
|
|
|
queue_interrupt_event(p_slot, event_type);
|
|
|
|
return 1;
|
|
}
|
|
|
|
u8 pciehp_handle_power_fault(struct slot *p_slot)
|
|
{
|
|
u32 event_type;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
/* power fault */
|
|
ctrl_dbg(ctrl, "Power fault interrupt received\n");
|
|
|
|
if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
|
|
/*
|
|
* power fault Cleared
|
|
*/
|
|
ctrl_info(ctrl, "Power fault cleared on Slot(%s)\n",
|
|
slot_name(p_slot));
|
|
event_type = INT_POWER_FAULT_CLEAR;
|
|
} else {
|
|
/*
|
|
* power fault
|
|
*/
|
|
ctrl_info(ctrl, "Power fault on Slot(%s)\n", slot_name(p_slot));
|
|
event_type = INT_POWER_FAULT;
|
|
ctrl_info(ctrl, "Power fault bit %x set\n", 0);
|
|
}
|
|
|
|
queue_interrupt_event(p_slot, event_type);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* The following routines constitute the bulk of the
|
|
hotplug controller logic
|
|
*/
|
|
|
|
static void set_slot_off(struct controller *ctrl, struct slot * pslot)
|
|
{
|
|
/* turn off slot, turn on Amber LED, turn off Green LED if supported*/
|
|
if (POWER_CTRL(ctrl)) {
|
|
if (pslot->hpc_ops->power_off_slot(pslot)) {
|
|
ctrl_err(ctrl,
|
|
"Issue of Slot Power Off command failed\n");
|
|
return;
|
|
}
|
|
/*
|
|
* After turning power off, we must wait for at least 1 second
|
|
* before taking any action that relies on power having been
|
|
* removed from the slot/adapter.
|
|
*/
|
|
msleep(1000);
|
|
}
|
|
|
|
if (PWR_LED(ctrl))
|
|
pslot->hpc_ops->green_led_off(pslot);
|
|
|
|
if (ATTN_LED(ctrl)) {
|
|
if (pslot->hpc_ops->set_attention_status(pslot, 1)) {
|
|
ctrl_err(ctrl,
|
|
"Issue of Set Attention Led command failed\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* board_added - Called after a board has been added to the system.
|
|
* @p_slot: &slot where board is added
|
|
*
|
|
* Turns power on for the board.
|
|
* Configures board.
|
|
*/
|
|
static int board_added(struct slot *p_slot)
|
|
{
|
|
int retval = 0;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
struct pci_bus *parent = ctrl->pci_dev->subordinate;
|
|
|
|
ctrl_dbg(ctrl, "%s: slot device, slot offset, hp slot = %d, %d, %d\n",
|
|
__func__, p_slot->device, ctrl->slot_device_offset,
|
|
p_slot->hp_slot);
|
|
|
|
if (POWER_CTRL(ctrl)) {
|
|
/* Power on slot */
|
|
retval = p_slot->hpc_ops->power_on_slot(p_slot);
|
|
if (retval)
|
|
return retval;
|
|
}
|
|
|
|
if (PWR_LED(ctrl))
|
|
p_slot->hpc_ops->green_led_blink(p_slot);
|
|
|
|
/* Check link training status */
|
|
retval = p_slot->hpc_ops->check_lnk_status(ctrl);
|
|
if (retval) {
|
|
ctrl_err(ctrl, "Failed to check link status\n");
|
|
set_slot_off(ctrl, p_slot);
|
|
return retval;
|
|
}
|
|
|
|
/* Check for a power fault */
|
|
if (p_slot->hpc_ops->query_power_fault(p_slot)) {
|
|
ctrl_dbg(ctrl, "Power fault detected\n");
|
|
retval = POWER_FAILURE;
|
|
goto err_exit;
|
|
}
|
|
|
|
retval = pciehp_configure_device(p_slot);
|
|
if (retval) {
|
|
ctrl_err(ctrl, "Cannot add device at %04x:%02x:%02x\n",
|
|
pci_domain_nr(parent), p_slot->bus, p_slot->device);
|
|
goto err_exit;
|
|
}
|
|
|
|
/*
|
|
* Some PCI Express root ports require fixup after hot-plug operation.
|
|
*/
|
|
if (pcie_mch_quirk)
|
|
pci_fixup_device(pci_fixup_final, ctrl->pci_dev);
|
|
if (PWR_LED(ctrl))
|
|
p_slot->hpc_ops->green_led_on(p_slot);
|
|
|
|
return 0;
|
|
|
|
err_exit:
|
|
set_slot_off(ctrl, p_slot);
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* remove_board - Turns off slot and LEDs
|
|
* @p_slot: slot where board is being removed
|
|
*/
|
|
static int remove_board(struct slot *p_slot)
|
|
{
|
|
int retval = 0;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
retval = pciehp_unconfigure_device(p_slot);
|
|
if (retval)
|
|
return retval;
|
|
|
|
ctrl_dbg(ctrl, "%s: hp_slot = %d\n", __func__, p_slot->hp_slot);
|
|
|
|
if (POWER_CTRL(ctrl)) {
|
|
/* power off slot */
|
|
retval = p_slot->hpc_ops->power_off_slot(p_slot);
|
|
if (retval) {
|
|
ctrl_err(ctrl,
|
|
"Issue of Slot Disable command failed\n");
|
|
return retval;
|
|
}
|
|
/*
|
|
* After turning power off, we must wait for at least 1 second
|
|
* before taking any action that relies on power having been
|
|
* removed from the slot/adapter.
|
|
*/
|
|
msleep(1000);
|
|
}
|
|
|
|
if (PWR_LED(ctrl))
|
|
/* turn off Green LED */
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct power_work_info {
|
|
struct slot *p_slot;
|
|
struct work_struct work;
|
|
};
|
|
|
|
/**
|
|
* pciehp_power_thread - handle pushbutton events
|
|
* @work: &struct work_struct describing work to be done
|
|
*
|
|
* Scheduled procedure to handle blocking stuff for the pushbuttons.
|
|
* Handles all pending events and exits.
|
|
*/
|
|
static void pciehp_power_thread(struct work_struct *work)
|
|
{
|
|
struct power_work_info *info =
|
|
container_of(work, struct power_work_info, work);
|
|
struct slot *p_slot = info->p_slot;
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (p_slot->state) {
|
|
case POWEROFF_STATE:
|
|
mutex_unlock(&p_slot->lock);
|
|
ctrl_dbg(p_slot->ctrl,
|
|
"Disabling domain:bus:device=%04x:%02x:%02x\n",
|
|
pci_domain_nr(p_slot->ctrl->pci_dev->subordinate),
|
|
p_slot->bus, p_slot->device);
|
|
pciehp_disable_slot(p_slot);
|
|
mutex_lock(&p_slot->lock);
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
case POWERON_STATE:
|
|
mutex_unlock(&p_slot->lock);
|
|
if (pciehp_enable_slot(p_slot) &&
|
|
PWR_LED(p_slot->ctrl))
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
mutex_lock(&p_slot->lock);
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
mutex_unlock(&p_slot->lock);
|
|
|
|
kfree(info);
|
|
}
|
|
|
|
void pciehp_queue_pushbutton_work(struct work_struct *work)
|
|
{
|
|
struct slot *p_slot = container_of(work, struct slot, work.work);
|
|
struct power_work_info *info;
|
|
|
|
info = kmalloc(sizeof(*info), GFP_KERNEL);
|
|
if (!info) {
|
|
ctrl_err(p_slot->ctrl, "%s: Cannot allocate memory\n",
|
|
__func__);
|
|
return;
|
|
}
|
|
info->p_slot = p_slot;
|
|
INIT_WORK(&info->work, pciehp_power_thread);
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (p_slot->state) {
|
|
case BLINKINGOFF_STATE:
|
|
p_slot->state = POWEROFF_STATE;
|
|
break;
|
|
case BLINKINGON_STATE:
|
|
p_slot->state = POWERON_STATE;
|
|
break;
|
|
default:
|
|
goto out;
|
|
}
|
|
queue_work(pciehp_wq, &info->work);
|
|
out:
|
|
mutex_unlock(&p_slot->lock);
|
|
}
|
|
|
|
static int update_slot_info(struct slot *slot)
|
|
{
|
|
struct hotplug_slot_info *info;
|
|
int result;
|
|
|
|
info = kmalloc(sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
slot->hpc_ops->get_power_status(slot, &(info->power_status));
|
|
slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
|
|
slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
|
|
slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
|
|
|
|
result = pci_hp_change_slot_info(slot->hotplug_slot, info);
|
|
kfree (info);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Note: This function must be called with slot->lock held
|
|
*/
|
|
static void handle_button_press_event(struct slot *p_slot)
|
|
{
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
u8 getstatus;
|
|
|
|
switch (p_slot->state) {
|
|
case STATIC_STATE:
|
|
p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (getstatus) {
|
|
p_slot->state = BLINKINGOFF_STATE;
|
|
ctrl_info(ctrl,
|
|
"PCI slot #%s - powering off due to button "
|
|
"press.\n", slot_name(p_slot));
|
|
} else {
|
|
p_slot->state = BLINKINGON_STATE;
|
|
ctrl_info(ctrl,
|
|
"PCI slot #%s - powering on due to button "
|
|
"press.\n", slot_name(p_slot));
|
|
}
|
|
/* blink green LED and turn off amber */
|
|
if (PWR_LED(ctrl))
|
|
p_slot->hpc_ops->green_led_blink(p_slot);
|
|
if (ATTN_LED(ctrl))
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 0);
|
|
|
|
schedule_delayed_work(&p_slot->work, 5*HZ);
|
|
break;
|
|
case BLINKINGOFF_STATE:
|
|
case BLINKINGON_STATE:
|
|
/*
|
|
* Cancel if we are still blinking; this means that we
|
|
* press the attention again before the 5 sec. limit
|
|
* expires to cancel hot-add or hot-remove
|
|
*/
|
|
ctrl_info(ctrl, "Button cancel on Slot(%s)\n", slot_name(p_slot));
|
|
cancel_delayed_work(&p_slot->work);
|
|
if (p_slot->state == BLINKINGOFF_STATE) {
|
|
if (PWR_LED(ctrl))
|
|
p_slot->hpc_ops->green_led_on(p_slot);
|
|
} else {
|
|
if (PWR_LED(ctrl))
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
}
|
|
if (ATTN_LED(ctrl))
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 0);
|
|
ctrl_info(ctrl, "PCI slot #%s - action canceled "
|
|
"due to button press\n", slot_name(p_slot));
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
case POWEROFF_STATE:
|
|
case POWERON_STATE:
|
|
/*
|
|
* Ignore if the slot is on power-on or power-off state;
|
|
* this means that the previous attention button action
|
|
* to hot-add or hot-remove is undergoing
|
|
*/
|
|
ctrl_info(ctrl, "Button ignore on Slot(%s)\n", slot_name(p_slot));
|
|
update_slot_info(p_slot);
|
|
break;
|
|
default:
|
|
ctrl_warn(ctrl, "Not a valid state\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Note: This function must be called with slot->lock held
|
|
*/
|
|
static void handle_surprise_event(struct slot *p_slot)
|
|
{
|
|
u8 getstatus;
|
|
struct power_work_info *info;
|
|
|
|
info = kmalloc(sizeof(*info), GFP_KERNEL);
|
|
if (!info) {
|
|
ctrl_err(p_slot->ctrl, "%s: Cannot allocate memory\n",
|
|
__func__);
|
|
return;
|
|
}
|
|
info->p_slot = p_slot;
|
|
INIT_WORK(&info->work, pciehp_power_thread);
|
|
|
|
p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
|
|
if (!getstatus)
|
|
p_slot->state = POWEROFF_STATE;
|
|
else
|
|
p_slot->state = POWERON_STATE;
|
|
|
|
queue_work(pciehp_wq, &info->work);
|
|
}
|
|
|
|
static void interrupt_event_handler(struct work_struct *work)
|
|
{
|
|
struct event_info *info = container_of(work, struct event_info, work);
|
|
struct slot *p_slot = info->p_slot;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (info->event_type) {
|
|
case INT_BUTTON_PRESS:
|
|
handle_button_press_event(p_slot);
|
|
break;
|
|
case INT_POWER_FAULT:
|
|
if (!POWER_CTRL(ctrl))
|
|
break;
|
|
if (ATTN_LED(ctrl))
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 1);
|
|
if (PWR_LED(ctrl))
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
break;
|
|
case INT_PRESENCE_ON:
|
|
case INT_PRESENCE_OFF:
|
|
if (!HP_SUPR_RM(ctrl))
|
|
break;
|
|
ctrl_dbg(ctrl, "Surprise Removal\n");
|
|
update_slot_info(p_slot);
|
|
handle_surprise_event(p_slot);
|
|
break;
|
|
default:
|
|
update_slot_info(p_slot);
|
|
break;
|
|
}
|
|
mutex_unlock(&p_slot->lock);
|
|
|
|
kfree(info);
|
|
}
|
|
|
|
int pciehp_enable_slot(struct slot *p_slot)
|
|
{
|
|
u8 getstatus = 0;
|
|
int rc;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
/* Check to see if (latch closed, card present, power off) */
|
|
mutex_lock(&p_slot->ctrl->crit_sect);
|
|
|
|
rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
|
|
if (rc || !getstatus) {
|
|
ctrl_info(ctrl, "No adapter on slot(%s)\n", slot_name(p_slot));
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
if (MRL_SENS(p_slot->ctrl)) {
|
|
rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
if (rc || getstatus) {
|
|
ctrl_info(ctrl, "Latch open on slot(%s)\n",
|
|
slot_name(p_slot));
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
if (POWER_CTRL(p_slot->ctrl)) {
|
|
rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (rc || getstatus) {
|
|
ctrl_info(ctrl, "Already enabled on slot(%s)\n",
|
|
slot_name(p_slot));
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
|
|
rc = board_added(p_slot);
|
|
if (rc) {
|
|
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
}
|
|
|
|
update_slot_info(p_slot);
|
|
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return rc;
|
|
}
|
|
|
|
|
|
int pciehp_disable_slot(struct slot *p_slot)
|
|
{
|
|
u8 getstatus = 0;
|
|
int ret = 0;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
if (!p_slot->ctrl)
|
|
return 1;
|
|
|
|
/* Check to see if (latch closed, card present, power on) */
|
|
mutex_lock(&p_slot->ctrl->crit_sect);
|
|
|
|
if (!HP_SUPR_RM(p_slot->ctrl)) {
|
|
ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
|
|
if (ret || !getstatus) {
|
|
ctrl_info(ctrl, "No adapter on slot(%s)\n",
|
|
slot_name(p_slot));
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
if (MRL_SENS(p_slot->ctrl)) {
|
|
ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
if (ret || getstatus) {
|
|
ctrl_info(ctrl, "Latch open on slot(%s)\n",
|
|
slot_name(p_slot));
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
if (POWER_CTRL(p_slot->ctrl)) {
|
|
ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (ret || !getstatus) {
|
|
ctrl_info(ctrl, "Already disabled on slot(%s)\n",
|
|
slot_name(p_slot));
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
ret = remove_board(p_slot);
|
|
update_slot_info(p_slot);
|
|
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return ret;
|
|
}
|
|
|
|
int pciehp_sysfs_enable_slot(struct slot *p_slot)
|
|
{
|
|
int retval = -ENODEV;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (p_slot->state) {
|
|
case BLINKINGON_STATE:
|
|
cancel_delayed_work(&p_slot->work);
|
|
case STATIC_STATE:
|
|
p_slot->state = POWERON_STATE;
|
|
mutex_unlock(&p_slot->lock);
|
|
retval = pciehp_enable_slot(p_slot);
|
|
mutex_lock(&p_slot->lock);
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
case POWERON_STATE:
|
|
ctrl_info(ctrl, "Slot %s is already in powering on state\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
case BLINKINGOFF_STATE:
|
|
case POWEROFF_STATE:
|
|
ctrl_info(ctrl, "Already enabled on slot %s\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
default:
|
|
ctrl_err(ctrl, "Not a valid state on slot %s\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
}
|
|
mutex_unlock(&p_slot->lock);
|
|
|
|
return retval;
|
|
}
|
|
|
|
int pciehp_sysfs_disable_slot(struct slot *p_slot)
|
|
{
|
|
int retval = -ENODEV;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (p_slot->state) {
|
|
case BLINKINGOFF_STATE:
|
|
cancel_delayed_work(&p_slot->work);
|
|
case STATIC_STATE:
|
|
p_slot->state = POWEROFF_STATE;
|
|
mutex_unlock(&p_slot->lock);
|
|
retval = pciehp_disable_slot(p_slot);
|
|
mutex_lock(&p_slot->lock);
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
case POWEROFF_STATE:
|
|
ctrl_info(ctrl, "Slot %s is already in powering off state\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
case BLINKINGON_STATE:
|
|
case POWERON_STATE:
|
|
ctrl_info(ctrl, "Already disabled on slot %s\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
default:
|
|
ctrl_err(ctrl, "Not a valid state on slot %s\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
}
|
|
mutex_unlock(&p_slot->lock);
|
|
|
|
return retval;
|
|
}
|