forked from luck/tmp_suning_uos_patched
576243b3f9
PCIe hotplug supports optional Attention and Power Indicators, which are used internally by pciehp. Users can't control the Power Indicator, but they can control the Attention Indicator by writing to a sysfs "attention" file. The Slot Control register has two bits for each indicator, and the PCIe spec defines the encodings for each as (Reserved/On/Blinking/Off). For sysfs "attention" writes, pciehp_set_attention_status() maps into these encodings, so the only useful write values are 0 (Off), 1 (On), and 2 (Blinking). However, some platforms use all four bits for platform-specific indicators, and they need to allow direct user control of them while preventing pciehp from using them at all. Add a "hotplug_user_indicators" flag to the pci_dev structure. When set, pciehp does not use either the Attention Indicator or the Power Indicator, and the low four bits (values 0x0 - 0xf) of sysfs "attention" write values are written directly to the Attention Indicator Control and Power Indicator Control fields. [bhelgaas: changelog, rename flag and accessors to s/attention/indicator/] Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
164 lines
5.5 KiB
C
164 lines
5.5 KiB
C
/*
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* PCI Express Hot Plug Controller Driver
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*
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* Copyright (C) 1995,2001 Compaq Computer Corporation
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* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2001 IBM Corp.
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* Copyright (C) 2003-2004 Intel Corporation
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
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*
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*/
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#ifndef _PCIEHP_H
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#define _PCIEHP_H
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/pci_hotplug.h>
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#include <linux/delay.h>
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#include <linux/sched.h> /* signal_pending() */
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#include <linux/pcieport_if.h>
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#include <linux/mutex.h>
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#include <linux/workqueue.h>
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#define MY_NAME "pciehp"
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extern bool pciehp_poll_mode;
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extern int pciehp_poll_time;
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extern bool pciehp_debug;
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#define dbg(format, arg...) \
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do { \
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if (pciehp_debug) \
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printk(KERN_DEBUG "%s: " format, MY_NAME, ## arg); \
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} while (0)
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#define err(format, arg...) \
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printk(KERN_ERR "%s: " format, MY_NAME, ## arg)
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#define info(format, arg...) \
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printk(KERN_INFO "%s: " format, MY_NAME, ## arg)
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#define warn(format, arg...) \
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printk(KERN_WARNING "%s: " format, MY_NAME, ## arg)
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#define ctrl_dbg(ctrl, format, arg...) \
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do { \
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if (pciehp_debug) \
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dev_printk(KERN_DEBUG, &ctrl->pcie->device, \
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format, ## arg); \
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} while (0)
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#define ctrl_err(ctrl, format, arg...) \
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dev_err(&ctrl->pcie->device, format, ## arg)
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#define ctrl_info(ctrl, format, arg...) \
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dev_info(&ctrl->pcie->device, format, ## arg)
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#define ctrl_warn(ctrl, format, arg...) \
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dev_warn(&ctrl->pcie->device, format, ## arg)
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#define SLOT_NAME_SIZE 10
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struct slot {
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u8 state;
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struct controller *ctrl;
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struct hotplug_slot *hotplug_slot;
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struct delayed_work work; /* work for button event */
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struct mutex lock;
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struct mutex hotplug_lock;
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struct workqueue_struct *wq;
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};
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struct event_info {
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u32 event_type;
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struct slot *p_slot;
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struct work_struct work;
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};
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struct controller {
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struct mutex ctrl_lock; /* controller lock */
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struct pcie_device *pcie; /* PCI Express port service */
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struct slot *slot;
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wait_queue_head_t queue; /* sleep & wake process */
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u32 slot_cap;
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u16 slot_ctrl;
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struct timer_list poll_timer;
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unsigned long cmd_started; /* jiffies */
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unsigned int cmd_busy:1;
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unsigned int link_active_reporting:1;
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unsigned int notification_enabled:1;
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unsigned int power_fault_detected;
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};
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#define INT_PRESENCE_ON 1
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#define INT_PRESENCE_OFF 2
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#define INT_POWER_FAULT 3
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#define INT_BUTTON_PRESS 4
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#define INT_LINK_UP 5
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#define INT_LINK_DOWN 6
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#define STATIC_STATE 0
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#define BLINKINGON_STATE 1
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#define BLINKINGOFF_STATE 2
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#define POWERON_STATE 3
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#define POWEROFF_STATE 4
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#define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP)
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#define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP)
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#define MRL_SENS(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_MRLSP)
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#define ATTN_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_AIP)
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#define PWR_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PIP)
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#define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_HPS)
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#define EMI(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_EIP)
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#define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_NCCS)
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#define PSN(ctrl) (((ctrl)->slot_cap & PCI_EXP_SLTCAP_PSN) >> 19)
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int pciehp_sysfs_enable_slot(struct slot *slot);
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int pciehp_sysfs_disable_slot(struct slot *slot);
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void pciehp_queue_interrupt_event(struct slot *slot, u32 event_type);
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int pciehp_configure_device(struct slot *p_slot);
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int pciehp_unconfigure_device(struct slot *p_slot);
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void pciehp_queue_pushbutton_work(struct work_struct *work);
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struct controller *pcie_init(struct pcie_device *dev);
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int pcie_init_notification(struct controller *ctrl);
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int pciehp_enable_slot(struct slot *p_slot);
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int pciehp_disable_slot(struct slot *p_slot);
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void pcie_enable_notification(struct controller *ctrl);
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int pciehp_power_on_slot(struct slot *slot);
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void pciehp_power_off_slot(struct slot *slot);
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void pciehp_get_power_status(struct slot *slot, u8 *status);
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void pciehp_get_attention_status(struct slot *slot, u8 *status);
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void pciehp_set_attention_status(struct slot *slot, u8 status);
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void pciehp_get_latch_status(struct slot *slot, u8 *status);
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void pciehp_get_adapter_status(struct slot *slot, u8 *status);
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int pciehp_query_power_fault(struct slot *slot);
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void pciehp_green_led_on(struct slot *slot);
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void pciehp_green_led_off(struct slot *slot);
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void pciehp_green_led_blink(struct slot *slot);
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int pciehp_check_link_status(struct controller *ctrl);
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bool pciehp_check_link_active(struct controller *ctrl);
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void pciehp_release_ctrl(struct controller *ctrl);
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int pciehp_reset_slot(struct slot *slot, int probe);
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int pciehp_set_raw_indicator_status(struct hotplug_slot *h_slot, u8 status);
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int pciehp_get_raw_indicator_status(struct hotplug_slot *h_slot, u8 *status);
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static inline const char *slot_name(struct slot *slot)
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{
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return hotplug_slot_name(slot->hotplug_slot);
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}
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#endif /* _PCIEHP_H */
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