353 lines
11 KiB
C
353 lines
11 KiB
C
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/*
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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>, <dely.l.sy@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/delay.h>
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#include <asm/semaphore.h>
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#include <asm/io.h>
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#include <linux/pcieport_if.h>
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#include "pci_hotplug.h"
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#define MY_NAME "pciehp"
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extern int pciehp_poll_mode;
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extern int pciehp_poll_time;
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extern int pciehp_debug;
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/*#define dbg(format, arg...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
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#define dbg(format, arg...) do { if (pciehp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
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#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
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#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
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#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
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struct pci_func {
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struct pci_func *next;
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u8 bus;
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u8 device;
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u8 function;
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u8 is_a_board;
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u16 status;
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u8 configured;
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u8 switch_save;
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u8 presence_save;
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u32 base_length[0x06];
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u8 base_type[0x06];
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u16 reserved2;
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u32 config_space[0x20];
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struct pci_resource *mem_head;
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struct pci_resource *p_mem_head;
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struct pci_resource *io_head;
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struct pci_resource *bus_head;
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struct pci_dev* pci_dev;
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};
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struct slot {
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struct slot *next;
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u8 bus;
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u8 device;
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u32 number;
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u8 is_a_board;
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u8 configured;
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u8 state;
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u8 switch_save;
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u8 presence_save;
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u32 capabilities;
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u16 reserved2;
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struct timer_list task_event;
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u8 hp_slot;
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struct controller *ctrl;
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struct hpc_ops *hpc_ops;
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struct hotplug_slot *hotplug_slot;
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struct list_head slot_list;
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};
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struct pci_resource {
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struct pci_resource * next;
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u32 base;
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u32 length;
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};
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struct event_info {
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u32 event_type;
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u8 hp_slot;
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};
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struct controller {
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struct controller *next;
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struct semaphore crit_sect; /* critical section semaphore */
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void *hpc_ctlr_handle; /* HPC controller handle */
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int num_slots; /* Number of slots on ctlr */
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int slot_num_inc; /* 1 or -1 */
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struct pci_resource *mem_head;
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struct pci_resource *p_mem_head;
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struct pci_resource *io_head;
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struct pci_resource *bus_head;
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struct pci_dev *pci_dev;
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struct pci_bus *pci_bus;
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struct event_info event_queue[10];
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struct slot *slot;
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struct hpc_ops *hpc_ops;
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wait_queue_head_t queue; /* sleep & wake process */
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u8 next_event;
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u8 seg;
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u8 bus;
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u8 device;
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u8 function;
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u8 rev;
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u8 slot_device_offset;
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u8 add_support;
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enum pci_bus_speed speed;
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u32 first_slot; /* First physical slot number */ /* PCIE only has 1 slot */
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u8 slot_bus; /* Bus where the slots handled by this controller sit */
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u8 ctrlcap;
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u16 vendor_id;
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};
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struct irq_mapping {
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u8 barber_pole;
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u8 valid_INT;
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u8 interrupt[4];
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};
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struct resource_lists {
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struct pci_resource *mem_head;
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struct pci_resource *p_mem_head;
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struct pci_resource *io_head;
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struct pci_resource *bus_head;
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struct irq_mapping *irqs;
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};
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#define INT_BUTTON_IGNORE 0
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#define INT_PRESENCE_ON 1
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#define INT_PRESENCE_OFF 2
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#define INT_SWITCH_CLOSE 3
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#define INT_SWITCH_OPEN 4
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#define INT_POWER_FAULT 5
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#define INT_POWER_FAULT_CLEAR 6
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#define INT_BUTTON_PRESS 7
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#define INT_BUTTON_RELEASE 8
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#define INT_BUTTON_CANCEL 9
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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 PCI_TO_PCI_BRIDGE_CLASS 0x00060400
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/* Error messages */
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#define INTERLOCK_OPEN 0x00000002
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#define ADD_NOT_SUPPORTED 0x00000003
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#define CARD_FUNCTIONING 0x00000005
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#define ADAPTER_NOT_SAME 0x00000006
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#define NO_ADAPTER_PRESENT 0x00000009
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#define NOT_ENOUGH_RESOURCES 0x0000000B
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#define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
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#define WRONG_BUS_FREQUENCY 0x0000000D
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#define POWER_FAILURE 0x0000000E
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#define REMOVE_NOT_SUPPORTED 0x00000003
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#define DISABLE_CARD 1
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/* Field definitions in Slot Capabilities Register */
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#define ATTN_BUTTN_PRSN 0x00000001
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#define PWR_CTRL_PRSN 0x00000002
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#define MRL_SENS_PRSN 0x00000004
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#define ATTN_LED_PRSN 0x00000008
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#define PWR_LED_PRSN 0x00000010
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#define HP_SUPR_RM_SUP 0x00000020
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#define ATTN_BUTTN(cap) (cap & ATTN_BUTTN_PRSN)
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#define POWER_CTRL(cap) (cap & PWR_CTRL_PRSN)
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#define MRL_SENS(cap) (cap & MRL_SENS_PRSN)
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#define ATTN_LED(cap) (cap & ATTN_LED_PRSN)
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#define PWR_LED(cap) (cap & PWR_LED_PRSN)
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#define HP_SUPR_RM(cap) (cap & HP_SUPR_RM_SUP)
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/*
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* error Messages
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*/
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#define msg_initialization_err "Initialization failure, error=%d\n"
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#define msg_HPC_rev_error "Unsupported revision of the PCI hot plug controller found.\n"
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#define msg_HPC_non_pcie "The PCI hot plug controller is not supported by this driver.\n"
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#define msg_HPC_not_supported "This system is not supported by this version of pciephd module. Upgrade to a newer version of pciehpd\n"
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#define msg_unable_to_save "Unable to store PCI hot plug add resource information. This system must be rebooted before adding any PCI devices.\n"
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#define msg_button_on "PCI slot #%d - powering on due to button press.\n"
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#define msg_button_off "PCI slot #%d - powering off due to button press.\n"
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#define msg_button_cancel "PCI slot #%d - action canceled due to button press.\n"
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#define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n"
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/* controller functions */
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extern int pciehprm_find_available_resources (struct controller *ctrl);
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extern int pciehp_event_start_thread (void);
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extern void pciehp_event_stop_thread (void);
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extern struct pci_func *pciehp_slot_create (unsigned char busnumber);
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extern struct pci_func *pciehp_slot_find (unsigned char bus, unsigned char device, unsigned char index);
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extern int pciehp_enable_slot (struct slot *slot);
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extern int pciehp_disable_slot (struct slot *slot);
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extern u8 pciehp_handle_attention_button (u8 hp_slot, void *inst_id);
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extern u8 pciehp_handle_switch_change (u8 hp_slot, void *inst_id);
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extern u8 pciehp_handle_presence_change (u8 hp_slot, void *inst_id);
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extern u8 pciehp_handle_power_fault (u8 hp_slot, void *inst_id);
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/* extern void long_delay (int delay); */
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/* resource functions */
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extern int pciehp_resource_sort_and_combine (struct pci_resource **head);
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/* pci functions */
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extern int pciehp_set_irq (u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
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/*extern int pciehp_get_bus_dev (struct controller *ctrl, u8 *bus_num, u8 *dev_num, struct slot *slot);*/
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extern int pciehp_save_config (struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
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extern int pciehp_save_used_resources (struct controller *ctrl, struct pci_func * func, int flag);
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extern int pciehp_save_slot_config (struct controller *ctrl, struct pci_func * new_slot);
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extern void pciehp_destroy_board_resources (struct pci_func * func);
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extern int pciehp_return_board_resources (struct pci_func * func, struct resource_lists * resources);
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extern void pciehp_destroy_resource_list (struct resource_lists * resources);
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extern int pciehp_configure_device (struct controller* ctrl, struct pci_func* func);
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extern int pciehp_unconfigure_device (struct pci_func* func);
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/* Global variables */
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extern struct controller *pciehp_ctrl_list;
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extern struct pci_func *pciehp_slot_list[256];
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/* Inline functions */
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static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
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{
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struct slot *p_slot, *tmp_slot = NULL;
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p_slot = ctrl->slot;
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dbg("p_slot = %p\n", p_slot);
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while (p_slot && (p_slot->device != device)) {
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tmp_slot = p_slot;
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p_slot = p_slot->next;
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dbg("In while loop, p_slot = %p\n", p_slot);
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}
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if (p_slot == NULL) {
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err("ERROR: pciehp_find_slot device=0x%x\n", device);
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p_slot = tmp_slot;
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}
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return p_slot;
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}
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static inline int wait_for_ctrl_irq(struct controller *ctrl)
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{
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int retval = 0;
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DECLARE_WAITQUEUE(wait, current);
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dbg("%s : start\n", __FUNCTION__);
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add_wait_queue(&ctrl->queue, &wait);
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if (!pciehp_poll_mode)
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/* Sleep for up to 1 second */
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msleep_interruptible(1000);
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else
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msleep_interruptible(2500);
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remove_wait_queue(&ctrl->queue, &wait);
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if (signal_pending(current))
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retval = -EINTR;
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dbg("%s : end\n", __FUNCTION__);
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return retval;
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}
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/* Puts node back in the resource list pointed to by head */
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static inline void return_resource(struct pci_resource **head, struct pci_resource *node)
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{
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if (!node || !head)
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return;
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node->next = *head;
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*head = node;
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}
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#define SLOT_NAME_SIZE 10
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static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot)
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{
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snprintf(buffer, buffer_size, "%d", slot->number);
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}
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enum php_ctlr_type {
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PCI,
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ISA,
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ACPI
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};
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typedef u8(*php_intr_callback_t) (unsigned int change_id, void *instance_id);
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int pcie_init(struct controller *ctrl, struct pcie_device *dev,
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php_intr_callback_t attention_button_callback,
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php_intr_callback_t switch_change_callback,
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php_intr_callback_t presence_change_callback,
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php_intr_callback_t power_fault_callback);
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/* This has no meaning for PCI Express, as there is only 1 slot per port */
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int pcie_get_ctlr_slot_config(struct controller *ctrl,
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int *num_ctlr_slots,
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int *first_device_num,
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int *physical_slot_num,
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u8 *ctrlcap);
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struct hpc_ops {
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int (*power_on_slot) (struct slot *slot);
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int (*power_off_slot) (struct slot *slot);
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int (*get_power_status) (struct slot *slot, u8 *status);
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int (*get_attention_status) (struct slot *slot, u8 *status);
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int (*set_attention_status) (struct slot *slot, u8 status);
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int (*get_latch_status) (struct slot *slot, u8 *status);
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int (*get_adapter_status) (struct slot *slot, u8 *status);
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int (*get_max_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
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int (*get_cur_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
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int (*get_max_lnk_width) (struct slot *slot, enum pcie_link_width *value);
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int (*get_cur_lnk_width) (struct slot *slot, enum pcie_link_width *value);
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int (*query_power_fault) (struct slot *slot);
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void (*green_led_on) (struct slot *slot);
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void (*green_led_off) (struct slot *slot);
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void (*green_led_blink) (struct slot *slot);
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void (*release_ctlr) (struct controller *ctrl);
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int (*check_lnk_status) (struct controller *ctrl);
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};
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||
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#endif /* _PCIEHP_H */
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