/* * 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 , * */ #ifndef _PCIEHP_H #define _PCIEHP_H #include #include #include #include #include /* signal_pending() */ #include #include #define MY_NAME "pciehp" extern int pciehp_poll_mode; extern int pciehp_poll_time; extern int pciehp_debug; extern int pciehp_force; /*#define dbg(format, arg...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/ #define dbg(format, arg...) do { if (pciehp_debug) printk("%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) struct slot { struct slot *next; u8 bus; u8 device; u32 number; u8 state; struct timer_list task_event; u8 hp_slot; struct controller *ctrl; struct hpc_ops *hpc_ops; struct hotplug_slot *hotplug_slot; struct list_head slot_list; }; struct event_info { u32 event_type; u8 hp_slot; }; typedef u8(*php_intr_callback_t) (u8 hp_slot, void *instance_id); struct php_ctlr_state_s { struct php_ctlr_state_s *pnext; struct pci_dev *pci_dev; unsigned int irq; unsigned long flags; /* spinlock's */ u32 slot_device_offset; u32 num_slots; struct timer_list int_poll_timer; /* Added for poll event */ php_intr_callback_t attention_button_callback; php_intr_callback_t switch_change_callback; php_intr_callback_t presence_change_callback; php_intr_callback_t power_fault_callback; void *callback_instance_id; struct ctrl_reg *creg; /* Ptr to controller register space */ }; #define MAX_EVENTS 10 struct controller { struct controller *next; struct mutex crit_sect; /* critical section mutex */ struct mutex ctrl_lock; /* controller lock */ struct php_ctlr_state_s *hpc_ctlr_handle; /* HPC controller handle */ int num_slots; /* Number of slots on ctlr */ int slot_num_inc; /* 1 or -1 */ struct pci_dev *pci_dev; struct pci_bus *pci_bus; struct event_info event_queue[MAX_EVENTS]; struct slot *slot; struct hpc_ops *hpc_ops; wait_queue_head_t queue; /* sleep & wake process */ u8 next_event; u8 bus; u8 device; u8 function; u8 slot_device_offset; u32 first_slot; /* First physical slot number */ /* PCIE only has 1 slot */ u8 slot_bus; /* Bus where the slots handled by this controller sit */ u8 ctrlcap; u16 vendor_id; u8 cap_base; }; #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 PCI_TO_PCI_BRIDGE_CLASS 0x00060400 /* Error messages */ #define INTERLOCK_OPEN 0x00000002 #define ADD_NOT_SUPPORTED 0x00000003 #define CARD_FUNCTIONING 0x00000005 #define ADAPTER_NOT_SAME 0x00000006 #define NO_ADAPTER_PRESENT 0x00000009 #define NOT_ENOUGH_RESOURCES 0x0000000B #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C #define WRONG_BUS_FREQUENCY 0x0000000D #define POWER_FAILURE 0x0000000E #define REMOVE_NOT_SUPPORTED 0x00000003 #define DISABLE_CARD 1 /* Field definitions in Slot Capabilities Register */ #define ATTN_BUTTN_PRSN 0x00000001 #define PWR_CTRL_PRSN 0x00000002 #define MRL_SENS_PRSN 0x00000004 #define ATTN_LED_PRSN 0x00000008 #define PWR_LED_PRSN 0x00000010 #define HP_SUPR_RM_SUP 0x00000020 #define ATTN_BUTTN(cap) (cap & ATTN_BUTTN_PRSN) #define POWER_CTRL(cap) (cap & PWR_CTRL_PRSN) #define MRL_SENS(cap) (cap & MRL_SENS_PRSN) #define ATTN_LED(cap) (cap & ATTN_LED_PRSN) #define PWR_LED(cap) (cap & PWR_LED_PRSN) #define HP_SUPR_RM(cap) (cap & HP_SUPR_RM_SUP) /* * error Messages */ #define msg_initialization_err "Initialization failure, error=%d\n" #define msg_button_on "PCI slot #%s - powering on due to button press.\n" #define msg_button_off "PCI slot #%s - powering off due to button press.\n" #define msg_button_cancel "PCI slot #%s - action canceled due to button press.\n" #define msg_button_ignore "PCI slot #%s - button press ignored. (action in progress...)\n" /* controller functions */ extern int pciehp_event_start_thread (void); extern void pciehp_event_stop_thread (void); extern int pciehp_enable_slot (struct slot *slot); extern int pciehp_disable_slot (struct slot *slot); extern u8 pciehp_handle_attention_button (u8 hp_slot, void *inst_id); extern u8 pciehp_handle_switch_change (u8 hp_slot, void *inst_id); extern u8 pciehp_handle_presence_change (u8 hp_slot, void *inst_id); extern u8 pciehp_handle_power_fault (u8 hp_slot, void *inst_id); /* extern void long_delay (int delay); */ /* pci functions */ extern int pciehp_configure_device (struct slot *p_slot); extern int pciehp_unconfigure_device (struct slot *p_slot); /* Global variables */ extern struct controller *pciehp_ctrl_list; /* Inline functions */ static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device) { struct slot *p_slot, *tmp_slot = NULL; p_slot = ctrl->slot; while (p_slot && (p_slot->device != device)) { tmp_slot = p_slot; p_slot = p_slot->next; } if (p_slot == NULL) { err("ERROR: pciehp_find_slot device=0x%x\n", device); p_slot = tmp_slot; } return p_slot; } static inline int wait_for_ctrl_irq(struct controller *ctrl) { int retval = 0; DECLARE_WAITQUEUE(wait, current); add_wait_queue(&ctrl->queue, &wait); if (!pciehp_poll_mode) /* Sleep for up to 1 second */ msleep_interruptible(1000); else msleep_interruptible(2500); remove_wait_queue(&ctrl->queue, &wait); if (signal_pending(current)) retval = -EINTR; return retval; } #define SLOT_NAME_SIZE 10 static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot) { snprintf(buffer, buffer_size, "%04d_%04d", slot->bus, slot->number); } enum php_ctlr_type { PCI, ISA, ACPI }; int pcie_init(struct controller *ctrl, struct pcie_device *dev); /* This has no meaning for PCI Express, as there is only 1 slot per port */ int pcie_get_ctlr_slot_config(struct controller *ctrl, int *num_ctlr_slots, int *first_device_num, int *physical_slot_num, u8 *ctrlcap); struct hpc_ops { int (*power_on_slot) (struct slot *slot); int (*power_off_slot) (struct slot *slot); int (*get_power_status) (struct slot *slot, u8 *status); int (*get_attention_status) (struct slot *slot, u8 *status); int (*set_attention_status) (struct slot *slot, u8 status); int (*get_latch_status) (struct slot *slot, u8 *status); int (*get_adapter_status) (struct slot *slot, u8 *status); int (*get_max_bus_speed) (struct slot *slot, enum pci_bus_speed *speed); int (*get_cur_bus_speed) (struct slot *slot, enum pci_bus_speed *speed); int (*get_max_lnk_width) (struct slot *slot, enum pcie_link_width *value); int (*get_cur_lnk_width) (struct slot *slot, enum pcie_link_width *value); int (*query_power_fault) (struct slot *slot); void (*green_led_on) (struct slot *slot); void (*green_led_off) (struct slot *slot); void (*green_led_blink) (struct slot *slot); void (*release_ctlr) (struct controller *ctrl); int (*check_lnk_status) (struct controller *ctrl); }; #ifdef CONFIG_ACPI #include #include #include #include #define pciehp_get_hp_hw_control_from_firmware(dev) \ pciehp_acpi_get_hp_hw_control_from_firmware(dev) static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev, struct hotplug_params *hpp) { if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp))) return -ENODEV; return 0; } #else #define pciehp_get_hp_hw_control_from_firmware(dev) 0 #define pciehp_get_hp_params_from_firmware(dev, hpp) (-ENODEV) #endif /* CONFIG_ACPI */ #endif /* _PCIEHP_H */