2e35afaefe
PCIe hotplug has a bus per slot, so we can just use a normal secondary bus reset. However, if a slot supports surprise removal, a bus reset can be seen as a presence detection change triggering a hot-remove followed by a hot-add. Disable presence detection from triggering an interrupt or being polled around the bus reset. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
184 lines
6 KiB
C
184 lines
6 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>
|
|
*
|
|
*/
|
|
#ifndef _PCIEHP_H
|
|
#define _PCIEHP_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/pci_hotplug.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/sched.h> /* signal_pending() */
|
|
#include <linux/pcieport_if.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#define MY_NAME "pciehp"
|
|
|
|
extern bool pciehp_poll_mode;
|
|
extern int pciehp_poll_time;
|
|
extern bool pciehp_debug;
|
|
extern bool pciehp_force;
|
|
|
|
#define dbg(format, arg...) \
|
|
do { \
|
|
if (pciehp_debug) \
|
|
printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); \
|
|
} while (0)
|
|
#define err(format, arg...) \
|
|
printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
|
|
#define info(format, arg...) \
|
|
printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
|
|
#define warn(format, arg...) \
|
|
printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
|
|
|
|
#define ctrl_dbg(ctrl, format, arg...) \
|
|
do { \
|
|
if (pciehp_debug) \
|
|
dev_printk(KERN_DEBUG, &ctrl->pcie->device, \
|
|
format, ## arg); \
|
|
} while (0)
|
|
#define ctrl_err(ctrl, format, arg...) \
|
|
dev_err(&ctrl->pcie->device, format, ## arg)
|
|
#define ctrl_info(ctrl, format, arg...) \
|
|
dev_info(&ctrl->pcie->device, format, ## arg)
|
|
#define ctrl_warn(ctrl, format, arg...) \
|
|
dev_warn(&ctrl->pcie->device, format, ## arg)
|
|
|
|
#define SLOT_NAME_SIZE 10
|
|
struct slot {
|
|
u8 state;
|
|
struct controller *ctrl;
|
|
struct hotplug_slot *hotplug_slot;
|
|
struct delayed_work work; /* work for button event */
|
|
struct mutex lock;
|
|
struct workqueue_struct *wq;
|
|
};
|
|
|
|
struct event_info {
|
|
u32 event_type;
|
|
struct slot *p_slot;
|
|
struct work_struct work;
|
|
};
|
|
|
|
struct controller {
|
|
struct mutex ctrl_lock; /* controller lock */
|
|
struct pcie_device *pcie; /* PCI Express port service */
|
|
struct slot *slot;
|
|
wait_queue_head_t queue; /* sleep & wake process */
|
|
u32 slot_cap;
|
|
struct timer_list poll_timer;
|
|
unsigned int cmd_busy:1;
|
|
unsigned int no_cmd_complete:1;
|
|
unsigned int link_active_reporting:1;
|
|
unsigned int notification_enabled:1;
|
|
unsigned int power_fault_detected;
|
|
};
|
|
|
|
#define INT_BUTTON_IGNORE 0
|
|
#define INT_PRESENCE_ON 1
|
|
#define INT_PRESENCE_OFF 2
|
|
#define INT_SWITCH_CLOSE 3
|
|
#define INT_SWITCH_OPEN 4
|
|
#define INT_POWER_FAULT 5
|
|
#define INT_POWER_FAULT_CLEAR 6
|
|
#define INT_BUTTON_PRESS 7
|
|
#define INT_BUTTON_RELEASE 8
|
|
#define INT_BUTTON_CANCEL 9
|
|
|
|
#define STATIC_STATE 0
|
|
#define BLINKINGON_STATE 1
|
|
#define BLINKINGOFF_STATE 2
|
|
#define POWERON_STATE 3
|
|
#define POWEROFF_STATE 4
|
|
|
|
#define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP)
|
|
#define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP)
|
|
#define MRL_SENS(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_MRLSP)
|
|
#define ATTN_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_AIP)
|
|
#define PWR_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PIP)
|
|
#define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_HPS)
|
|
#define EMI(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_EIP)
|
|
#define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_NCCS)
|
|
#define PSN(ctrl) ((ctrl)->slot_cap >> 19)
|
|
|
|
int pciehp_sysfs_enable_slot(struct slot *slot);
|
|
int pciehp_sysfs_disable_slot(struct slot *slot);
|
|
u8 pciehp_handle_attention_button(struct slot *p_slot);
|
|
u8 pciehp_handle_switch_change(struct slot *p_slot);
|
|
u8 pciehp_handle_presence_change(struct slot *p_slot);
|
|
u8 pciehp_handle_power_fault(struct slot *p_slot);
|
|
int pciehp_configure_device(struct slot *p_slot);
|
|
int pciehp_unconfigure_device(struct slot *p_slot);
|
|
void pciehp_queue_pushbutton_work(struct work_struct *work);
|
|
struct controller *pcie_init(struct pcie_device *dev);
|
|
int pcie_init_notification(struct controller *ctrl);
|
|
int pciehp_enable_slot(struct slot *p_slot);
|
|
int pciehp_disable_slot(struct slot *p_slot);
|
|
int pcie_enable_notification(struct controller *ctrl);
|
|
int pciehp_power_on_slot(struct slot *slot);
|
|
int pciehp_power_off_slot(struct slot *slot);
|
|
int pciehp_get_power_status(struct slot *slot, u8 *status);
|
|
int pciehp_get_attention_status(struct slot *slot, u8 *status);
|
|
|
|
int pciehp_set_attention_status(struct slot *slot, u8 status);
|
|
int pciehp_get_latch_status(struct slot *slot, u8 *status);
|
|
int pciehp_get_adapter_status(struct slot *slot, u8 *status);
|
|
int pciehp_query_power_fault(struct slot *slot);
|
|
void pciehp_green_led_on(struct slot *slot);
|
|
void pciehp_green_led_off(struct slot *slot);
|
|
void pciehp_green_led_blink(struct slot *slot);
|
|
int pciehp_check_link_status(struct controller *ctrl);
|
|
void pciehp_release_ctrl(struct controller *ctrl);
|
|
int pciehp_reset_slot(struct slot *slot, int probe);
|
|
|
|
static inline const char *slot_name(struct slot *slot)
|
|
{
|
|
return hotplug_slot_name(slot->hotplug_slot);
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI
|
|
#include <acpi/acpi.h>
|
|
#include <acpi/acpi_bus.h>
|
|
#include <linux/pci-acpi.h>
|
|
|
|
void __init pciehp_acpi_slot_detection_init(void);
|
|
int pciehp_acpi_slot_detection_check(struct pci_dev *dev);
|
|
|
|
static inline void pciehp_firmware_init(void)
|
|
{
|
|
pciehp_acpi_slot_detection_init();
|
|
}
|
|
#else
|
|
#define pciehp_firmware_init() do {} while (0)
|
|
static inline int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_ACPI */
|
|
#endif /* _PCIEHP_H */
|