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linux-stable/drivers/pci/hotplug/cpqphp.h
Lukas Wunner 125450f814 PCI: hotplug: Embed hotplug_slot 
When the PCI hotplug core and its first user, cpqphp, were introduced in
February 2002 with historic commit a8a2069f432c, cpqphp allocated a slot
struct for its internal use plus a hotplug_slot struct to be registered
with the hotplug core and linked the two with pointers:
https://git.kernel.org/tglx/history/c/a8a2069f432c

Nowadays, the predominant pattern in the tree is to embed ("subclass")
such structures in one another and cast to the containing struct with
container_of().  But it wasn't until July 2002 that container_of() was
introduced with historic commit ec4f214232cf:
https://git.kernel.org/tglx/history/c/ec4f214232cf

pnv_php, introduced in 2016, did the right thing and embedded struct
hotplug_slot in its internal struct pnv_php_slot, but all other drivers
cargo-culted cpqphp's design and linked separate structs with pointers.

Embedding structs is preferrable to linking them with pointers because
it requires fewer allocations, thereby reducing overhead and simplifying
error paths.  Casting an embedded struct to the containing struct
becomes a cheap subtraction rather than a dereference.  And having fewer
pointers reduces the risk of them pointing nowhere either accidentally
or due to an attack.

Convert all drivers to embed struct hotplug_slot in their internal slot
struct.  The "private" pointer in struct hotplug_slot thereby becomes
unused, so drop it.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>  # drivers/pci/hotplug/rpa*
Acked-by: Sebastian Ott <sebott@linux.ibm.com>        # drivers/pci/hotplug/s390*
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> # drivers/platform/x86
Cc: Len Brown <lenb@kernel.org>
Cc: Scott Murray <scott@spiteful.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Oliver OHalloran <oliveroh@au1.ibm.com>
Cc: Gavin Shan <gwshan@linux.vnet.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Corentin Chary <corentin.chary@gmail.com>
Cc: Darren Hart <dvhart@infradead.org>
2018-09-18 17:52:15 -05:00

729 lines
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Compaq Hot Plug Controller Driver
*
* Copyright (C) 1995,2001 Compaq Computer Corporation
* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2001 IBM
*
* All rights reserved.
*
* Send feedback to <greg@kroah.com>
*
*/
#ifndef _CPQPHP_H
#define _CPQPHP_H
#include <linux/interrupt.h>
#include <asm/io.h> /* for read? and write? functions */
#include <linux/delay.h> /* for delays */
#include <linux/mutex.h>
#include <linux/sched/signal.h> /* for signal_pending() */
#define MY_NAME "cpqphp"
#define dbg(fmt, arg...) do { if (cpqhp_debug) printk(KERN_DEBUG "%s: " fmt, 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 smbios_system_slot {
u8 type;
u8 length;
u16 handle;
u8 name_string_num;
u8 slot_type;
u8 slot_width;
u8 slot_current_usage;
u8 slot_length;
u16 slot_number;
u8 properties1;
u8 properties2;
} __attribute__ ((packed));
/* offsets to the smbios generic type based on the above structure layout */
enum smbios_system_slot_offsets {
SMBIOS_SLOT_GENERIC_TYPE = offsetof(struct smbios_system_slot, type),
SMBIOS_SLOT_GENERIC_LENGTH = offsetof(struct smbios_system_slot, length),
SMBIOS_SLOT_GENERIC_HANDLE = offsetof(struct smbios_system_slot, handle),
SMBIOS_SLOT_NAME_STRING_NUM = offsetof(struct smbios_system_slot, name_string_num),
SMBIOS_SLOT_TYPE = offsetof(struct smbios_system_slot, slot_type),
SMBIOS_SLOT_WIDTH = offsetof(struct smbios_system_slot, slot_width),
SMBIOS_SLOT_CURRENT_USAGE = offsetof(struct smbios_system_slot, slot_current_usage),
SMBIOS_SLOT_LENGTH = offsetof(struct smbios_system_slot, slot_length),
SMBIOS_SLOT_NUMBER = offsetof(struct smbios_system_slot, slot_number),
SMBIOS_SLOT_PROPERTIES1 = offsetof(struct smbios_system_slot, properties1),
SMBIOS_SLOT_PROPERTIES2 = offsetof(struct smbios_system_slot, properties2),
};
struct smbios_generic {
u8 type;
u8 length;
u16 handle;
} __attribute__ ((packed));
/* offsets to the smbios generic type based on the above structure layout */
enum smbios_generic_offsets {
SMBIOS_GENERIC_TYPE = offsetof(struct smbios_generic, type),
SMBIOS_GENERIC_LENGTH = offsetof(struct smbios_generic, length),
SMBIOS_GENERIC_HANDLE = offsetof(struct smbios_generic, handle),
};
struct smbios_entry_point {
char anchor[4];
u8 ep_checksum;
u8 ep_length;
u8 major_version;
u8 minor_version;
u16 max_size_entry;
u8 ep_rev;
u8 reserved[5];
char int_anchor[5];
u8 int_checksum;
u16 st_length;
u32 st_address;
u16 number_of_entrys;
u8 bcd_rev;
} __attribute__ ((packed));
/* offsets to the smbios entry point based on the above structure layout */
enum smbios_entry_point_offsets {
ANCHOR = offsetof(struct smbios_entry_point, anchor[0]),
EP_CHECKSUM = offsetof(struct smbios_entry_point, ep_checksum),
EP_LENGTH = offsetof(struct smbios_entry_point, ep_length),
MAJOR_VERSION = offsetof(struct smbios_entry_point, major_version),
MINOR_VERSION = offsetof(struct smbios_entry_point, minor_version),
MAX_SIZE_ENTRY = offsetof(struct smbios_entry_point, max_size_entry),
EP_REV = offsetof(struct smbios_entry_point, ep_rev),
INT_ANCHOR = offsetof(struct smbios_entry_point, int_anchor[0]),
INT_CHECKSUM = offsetof(struct smbios_entry_point, int_checksum),
ST_LENGTH = offsetof(struct smbios_entry_point, st_length),
ST_ADDRESS = offsetof(struct smbios_entry_point, st_address),
NUMBER_OF_ENTRYS = offsetof(struct smbios_entry_point, number_of_entrys),
BCD_REV = offsetof(struct smbios_entry_point, bcd_rev),
};
struct ctrl_reg { /* offset */
u8 slot_RST; /* 0x00 */
u8 slot_enable; /* 0x01 */
u16 misc; /* 0x02 */
u32 led_control; /* 0x04 */
u32 int_input_clear; /* 0x08 */
u32 int_mask; /* 0x0a */
u8 reserved0; /* 0x10 */
u8 reserved1; /* 0x11 */
u8 reserved2; /* 0x12 */
u8 gen_output_AB; /* 0x13 */
u32 non_int_input; /* 0x14 */
u32 reserved3; /* 0x18 */
u32 reserved4; /* 0x1a */
u32 reserved5; /* 0x20 */
u8 reserved6; /* 0x24 */
u8 reserved7; /* 0x25 */
u16 reserved8; /* 0x26 */
u8 slot_mask; /* 0x28 */
u8 reserved9; /* 0x29 */
u8 reserved10; /* 0x2a */
u8 reserved11; /* 0x2b */
u8 slot_SERR; /* 0x2c */
u8 slot_power; /* 0x2d */
u8 reserved12; /* 0x2e */
u8 reserved13; /* 0x2f */
u8 next_curr_freq; /* 0x30 */
u8 reset_freq_mode; /* 0x31 */
} __attribute__ ((packed));
/* offsets to the controller registers based on the above structure layout */
enum ctrl_offsets {
SLOT_RST = offsetof(struct ctrl_reg, slot_RST),
SLOT_ENABLE = offsetof(struct ctrl_reg, slot_enable),
MISC = offsetof(struct ctrl_reg, misc),
LED_CONTROL = offsetof(struct ctrl_reg, led_control),
INT_INPUT_CLEAR = offsetof(struct ctrl_reg, int_input_clear),
INT_MASK = offsetof(struct ctrl_reg, int_mask),
CTRL_RESERVED0 = offsetof(struct ctrl_reg, reserved0),
CTRL_RESERVED1 = offsetof(struct ctrl_reg, reserved1),
CTRL_RESERVED2 = offsetof(struct ctrl_reg, reserved1),
GEN_OUTPUT_AB = offsetof(struct ctrl_reg, gen_output_AB),
NON_INT_INPUT = offsetof(struct ctrl_reg, non_int_input),
CTRL_RESERVED3 = offsetof(struct ctrl_reg, reserved3),
CTRL_RESERVED4 = offsetof(struct ctrl_reg, reserved4),
CTRL_RESERVED5 = offsetof(struct ctrl_reg, reserved5),
CTRL_RESERVED6 = offsetof(struct ctrl_reg, reserved6),
CTRL_RESERVED7 = offsetof(struct ctrl_reg, reserved7),
CTRL_RESERVED8 = offsetof(struct ctrl_reg, reserved8),
SLOT_MASK = offsetof(struct ctrl_reg, slot_mask),
CTRL_RESERVED9 = offsetof(struct ctrl_reg, reserved9),
CTRL_RESERVED10 = offsetof(struct ctrl_reg, reserved10),
CTRL_RESERVED11 = offsetof(struct ctrl_reg, reserved11),
SLOT_SERR = offsetof(struct ctrl_reg, slot_SERR),
SLOT_POWER = offsetof(struct ctrl_reg, slot_power),
NEXT_CURR_FREQ = offsetof(struct ctrl_reg, next_curr_freq),
RESET_FREQ_MODE = offsetof(struct ctrl_reg, reset_freq_mode),
};
struct hrt {
char sig0;
char sig1;
char sig2;
char sig3;
u16 unused_IRQ;
u16 PCIIRQ;
u8 number_of_entries;
u8 revision;
u16 reserved1;
u32 reserved2;
} __attribute__ ((packed));
/* offsets to the hotplug resource table registers based on the above
* structure layout
*/
enum hrt_offsets {
SIG0 = offsetof(struct hrt, sig0),
SIG1 = offsetof(struct hrt, sig1),
SIG2 = offsetof(struct hrt, sig2),
SIG3 = offsetof(struct hrt, sig3),
UNUSED_IRQ = offsetof(struct hrt, unused_IRQ),
PCIIRQ = offsetof(struct hrt, PCIIRQ),
NUMBER_OF_ENTRIES = offsetof(struct hrt, number_of_entries),
REVISION = offsetof(struct hrt, revision),
HRT_RESERVED1 = offsetof(struct hrt, reserved1),
HRT_RESERVED2 = offsetof(struct hrt, reserved2),
};
struct slot_rt {
u8 dev_func;
u8 primary_bus;
u8 secondary_bus;
u8 max_bus;
u16 io_base;
u16 io_length;
u16 mem_base;
u16 mem_length;
u16 pre_mem_base;
u16 pre_mem_length;
} __attribute__ ((packed));
/* offsets to the hotplug slot resource table registers based on the above
* structure layout
*/
enum slot_rt_offsets {
DEV_FUNC = offsetof(struct slot_rt, dev_func),
PRIMARY_BUS = offsetof(struct slot_rt, primary_bus),
SECONDARY_BUS = offsetof(struct slot_rt, secondary_bus),
MAX_BUS = offsetof(struct slot_rt, max_bus),
IO_BASE = offsetof(struct slot_rt, io_base),
IO_LENGTH = offsetof(struct slot_rt, io_length),
MEM_BASE = offsetof(struct slot_rt, mem_base),
MEM_LENGTH = offsetof(struct slot_rt, mem_length),
PRE_MEM_BASE = offsetof(struct slot_rt, pre_mem_base),
PRE_MEM_LENGTH = offsetof(struct slot_rt, pre_mem_length),
};
struct pci_func {
struct pci_func *next;
u8 bus;
u8 device;
u8 function;
u8 is_a_board;
u16 status;
u8 configured;
u8 switch_save;
u8 presence_save;
u32 base_length[0x06];
u8 base_type[0x06];
u16 reserved2;
u32 config_space[0x20];
struct pci_resource *mem_head;
struct pci_resource *p_mem_head;
struct pci_resource *io_head;
struct pci_resource *bus_head;
struct timer_list *p_task_event;
struct pci_dev *pci_dev;
};
struct slot {
struct slot *next;
u8 bus;
u8 device;
u8 number;
u8 is_a_board;
u8 configured;
u8 state;
u8 switch_save;
u8 presence_save;
u32 capabilities;
u16 reserved2;
struct timer_list task_event;
u8 hp_slot;
struct controller *ctrl;
void __iomem *p_sm_slot;
struct hotplug_slot hotplug_slot;
};
struct pci_resource {
struct pci_resource *next;
u32 base;
u32 length;
};
struct event_info {
u32 event_type;
u8 hp_slot;
};
struct controller {
struct controller *next;
u32 ctrl_int_comp;
struct mutex crit_sect; /* critical section mutex */
void __iomem *hpc_reg; /* cookie for our pci controller location */
struct pci_resource *mem_head;
struct pci_resource *p_mem_head;
struct pci_resource *io_head;
struct pci_resource *bus_head;
struct pci_dev *pci_dev;
struct pci_bus *pci_bus;
struct event_info event_queue[10];
struct slot *slot;
u8 next_event;
u8 interrupt;
u8 cfgspc_irq;
u8 bus; /* bus number for the pci hotplug controller */
u8 rev;
u8 slot_device_offset;
u8 first_slot;
u8 add_support;
u8 push_flag;
u8 push_button; /* 0 = no pushbutton, 1 = pushbutton present */
u8 slot_switch_type; /* 0 = no switch, 1 = switch present */
u8 defeature_PHP; /* 0 = PHP not supported, 1 = PHP supported */
u8 alternate_base_address; /* 0 = not supported, 1 = supported */
u8 pci_config_space; /* Index/data access to working registers 0 = not supported, 1 = supported */
u8 pcix_speed_capability; /* PCI-X */
u8 pcix_support; /* PCI-X */
u16 vendor_id;
struct work_struct int_task_event;
wait_queue_head_t queue; /* sleep & wake process */
struct dentry *dentry; /* debugfs dentry */
};
struct irq_mapping {
u8 barber_pole;
u8 valid_INT;
u8 interrupt[4];
};
struct resource_lists {
struct pci_resource *mem_head;
struct pci_resource *p_mem_head;
struct pci_resource *io_head;
struct pci_resource *bus_head;
struct irq_mapping *irqs;
};
#define ROM_PHY_ADDR 0x0F0000
#define ROM_PHY_LEN 0x00ffff
#define PCI_HPC_ID 0xA0F7
#define PCI_SUB_HPC_ID 0xA2F7
#define PCI_SUB_HPC_ID2 0xA2F8
#define PCI_SUB_HPC_ID3 0xA2F9
#define PCI_SUB_HPC_ID_INTC 0xA2FA
#define PCI_SUB_HPC_ID4 0xA2FD
#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 PCISLOT_INTERLOCK_CLOSED 0x00000001
#define PCISLOT_ADAPTER_PRESENT 0x00000002
#define PCISLOT_POWERED 0x00000004
#define PCISLOT_66_MHZ_OPERATION 0x00000008
#define PCISLOT_64_BIT_OPERATION 0x00000010
#define PCISLOT_REPLACE_SUPPORTED 0x00000020
#define PCISLOT_ADD_SUPPORTED 0x00000040
#define PCISLOT_INTERLOCK_SUPPORTED 0x00000080
#define PCISLOT_66_MHZ_SUPPORTED 0x00000100
#define PCISLOT_64_BIT_SUPPORTED 0x00000200
#define PCI_TO_PCI_BRIDGE_CLASS 0x00060400
#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 POWER_FAILURE 0x0000000E
#define REMOVE_NOT_SUPPORTED 0x00000003
/*
* error Messages
*/
#define msg_initialization_err "Initialization failure, error=%d\n"
#define msg_HPC_rev_error "Unsupported revision of the PCI hot plug controller found.\n"
#define msg_HPC_non_compaq_or_intel "The PCI hot plug controller is not supported by this driver.\n"
#define msg_HPC_not_supported "this system is not supported by this version of cpqphpd. Upgrade to a newer version of cpqphpd\n"
#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"
#define msg_button_on "PCI slot #%d - powering on due to button press.\n"
#define msg_button_off "PCI slot #%d - powering off due to button press.\n"
#define msg_button_cancel "PCI slot #%d - action canceled due to button press.\n"
#define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n"
/* debugfs functions for the hotplug controller info */
void cpqhp_initialize_debugfs(void);
void cpqhp_shutdown_debugfs(void);
void cpqhp_create_debugfs_files(struct controller *ctrl);
void cpqhp_remove_debugfs_files(struct controller *ctrl);
/* controller functions */
void cpqhp_pushbutton_thread(struct timer_list *t);
irqreturn_t cpqhp_ctrl_intr(int IRQ, void *data);
int cpqhp_find_available_resources(struct controller *ctrl,
void __iomem *rom_start);
int cpqhp_event_start_thread(void);
void cpqhp_event_stop_thread(void);
struct pci_func *cpqhp_slot_create(unsigned char busnumber);
struct pci_func *cpqhp_slot_find(unsigned char bus, unsigned char device,
unsigned char index);
int cpqhp_process_SI(struct controller *ctrl, struct pci_func *func);
int cpqhp_process_SS(struct controller *ctrl, struct pci_func *func);
int cpqhp_hardware_test(struct controller *ctrl, int test_num);
/* resource functions */
int cpqhp_resource_sort_and_combine(struct pci_resource **head);
/* pci functions */
int cpqhp_set_irq(u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
int cpqhp_get_bus_dev(struct controller *ctrl, u8 *bus_num, u8 *dev_num,
u8 slot);
int cpqhp_save_config(struct controller *ctrl, int busnumber, int is_hot_plug);
int cpqhp_save_base_addr_length(struct controller *ctrl, struct pci_func *func);
int cpqhp_save_used_resources(struct controller *ctrl, struct pci_func *func);
int cpqhp_configure_board(struct controller *ctrl, struct pci_func *func);
int cpqhp_save_slot_config(struct controller *ctrl, struct pci_func *new_slot);
int cpqhp_valid_replace(struct controller *ctrl, struct pci_func *func);
void cpqhp_destroy_board_resources(struct pci_func *func);
int cpqhp_return_board_resources(struct pci_func *func,
struct resource_lists *resources);
void cpqhp_destroy_resource_list(struct resource_lists *resources);
int cpqhp_configure_device(struct controller *ctrl, struct pci_func *func);
int cpqhp_unconfigure_device(struct pci_func *func);
/* Global variables */
extern int cpqhp_debug;
extern int cpqhp_legacy_mode;
extern struct controller *cpqhp_ctrl_list;
extern struct pci_func *cpqhp_slot_list[256];
extern struct irq_routing_table *cpqhp_routing_table;
/* these can be gotten rid of, but for debugging they are purty */
extern u8 cpqhp_nic_irq;
extern u8 cpqhp_disk_irq;
/* inline functions */
static inline const char *slot_name(struct slot *slot)
{
return hotplug_slot_name(&slot->hotplug_slot);
}
static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot)
{
return container_of(hotplug_slot, struct slot, hotplug_slot);
}
/*
* return_resource
*
* Puts node back in the resource list pointed to by head
*/
static inline void return_resource(struct pci_resource **head,
struct pci_resource *node)
{
if (!node || !head)
return;
node->next = *head;
*head = node;
}
static inline void set_SOGO(struct controller *ctrl)
{
u16 misc;
misc = readw(ctrl->hpc_reg + MISC);
misc = (misc | 0x0001) & 0xFFFB;
writew(misc, ctrl->hpc_reg + MISC);
}
static inline void amber_LED_on(struct controller *ctrl, u8 slot)
{
u32 led_control;
led_control = readl(ctrl->hpc_reg + LED_CONTROL);
led_control |= (0x01010000L << slot);
writel(led_control, ctrl->hpc_reg + LED_CONTROL);
}
static inline void amber_LED_off(struct controller *ctrl, u8 slot)
{
u32 led_control;
led_control = readl(ctrl->hpc_reg + LED_CONTROL);
led_control &= ~(0x01010000L << slot);
writel(led_control, ctrl->hpc_reg + LED_CONTROL);
}
static inline int read_amber_LED(struct controller *ctrl, u8 slot)
{
u32 led_control;
led_control = readl(ctrl->hpc_reg + LED_CONTROL);
led_control &= (0x01010000L << slot);
return led_control ? 1 : 0;
}
static inline void green_LED_on(struct controller *ctrl, u8 slot)
{
u32 led_control;
led_control = readl(ctrl->hpc_reg + LED_CONTROL);
led_control |= 0x0101L << slot;
writel(led_control, ctrl->hpc_reg + LED_CONTROL);
}
static inline void green_LED_off(struct controller *ctrl, u8 slot)
{
u32 led_control;
led_control = readl(ctrl->hpc_reg + LED_CONTROL);
led_control &= ~(0x0101L << slot);
writel(led_control, ctrl->hpc_reg + LED_CONTROL);
}
static inline void green_LED_blink(struct controller *ctrl, u8 slot)
{
u32 led_control;
led_control = readl(ctrl->hpc_reg + LED_CONTROL);
led_control &= ~(0x0101L << slot);
led_control |= (0x0001L << slot);
writel(led_control, ctrl->hpc_reg + LED_CONTROL);
}
static inline void slot_disable(struct controller *ctrl, u8 slot)
{
u8 slot_enable;
slot_enable = readb(ctrl->hpc_reg + SLOT_ENABLE);
slot_enable &= ~(0x01 << slot);
writeb(slot_enable, ctrl->hpc_reg + SLOT_ENABLE);
}
static inline void slot_enable(struct controller *ctrl, u8 slot)
{
u8 slot_enable;
slot_enable = readb(ctrl->hpc_reg + SLOT_ENABLE);
slot_enable |= (0x01 << slot);
writeb(slot_enable, ctrl->hpc_reg + SLOT_ENABLE);
}
static inline u8 is_slot_enabled(struct controller *ctrl, u8 slot)
{
u8 slot_enable;
slot_enable = readb(ctrl->hpc_reg + SLOT_ENABLE);
slot_enable &= (0x01 << slot);
return slot_enable ? 1 : 0;
}
static inline u8 read_slot_enable(struct controller *ctrl)
{
return readb(ctrl->hpc_reg + SLOT_ENABLE);
}
/**
* get_controller_speed - find the current frequency/mode of controller.
*
* @ctrl: controller to get frequency/mode for.
*
* Returns controller speed.
*/
static inline u8 get_controller_speed(struct controller *ctrl)
{
u8 curr_freq;
u16 misc;
if (ctrl->pcix_support) {
curr_freq = readb(ctrl->hpc_reg + NEXT_CURR_FREQ);
if ((curr_freq & 0xB0) == 0xB0)
return PCI_SPEED_133MHz_PCIX;
if ((curr_freq & 0xA0) == 0xA0)
return PCI_SPEED_100MHz_PCIX;
if ((curr_freq & 0x90) == 0x90)
return PCI_SPEED_66MHz_PCIX;
if (curr_freq & 0x10)
return PCI_SPEED_66MHz;
return PCI_SPEED_33MHz;
}
misc = readw(ctrl->hpc_reg + MISC);
return (misc & 0x0800) ? PCI_SPEED_66MHz : PCI_SPEED_33MHz;
}
/**
* get_adapter_speed - find the max supported frequency/mode of adapter.
*
* @ctrl: hotplug controller.
* @hp_slot: hotplug slot where adapter is installed.
*
* Returns adapter speed.
*/
static inline u8 get_adapter_speed(struct controller *ctrl, u8 hp_slot)
{
u32 temp_dword = readl(ctrl->hpc_reg + NON_INT_INPUT);
dbg("slot: %d, PCIXCAP: %8x\n", hp_slot, temp_dword);
if (ctrl->pcix_support) {
if (temp_dword & (0x10000 << hp_slot))
return PCI_SPEED_133MHz_PCIX;
if (temp_dword & (0x100 << hp_slot))
return PCI_SPEED_66MHz_PCIX;
}
if (temp_dword & (0x01 << hp_slot))
return PCI_SPEED_66MHz;
return PCI_SPEED_33MHz;
}
static inline void enable_slot_power(struct controller *ctrl, u8 slot)
{
u8 slot_power;
slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
slot_power |= (0x01 << slot);
writeb(slot_power, ctrl->hpc_reg + SLOT_POWER);
}
static inline void disable_slot_power(struct controller *ctrl, u8 slot)
{
u8 slot_power;
slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
slot_power &= ~(0x01 << slot);
writeb(slot_power, ctrl->hpc_reg + SLOT_POWER);
}
static inline int cpq_get_attention_status(struct controller *ctrl, struct slot *slot)
{
u8 hp_slot;
hp_slot = slot->device - ctrl->slot_device_offset;
return read_amber_LED(ctrl, hp_slot);
}
static inline int get_slot_enabled(struct controller *ctrl, struct slot *slot)
{
u8 hp_slot;
hp_slot = slot->device - ctrl->slot_device_offset;
return is_slot_enabled(ctrl, hp_slot);
}
static inline int cpq_get_latch_status(struct controller *ctrl,
struct slot *slot)
{
u32 status;
u8 hp_slot;
hp_slot = slot->device - ctrl->slot_device_offset;
dbg("%s: slot->device = %d, ctrl->slot_device_offset = %d\n",
__func__, slot->device, ctrl->slot_device_offset);
status = (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot));
return (status == 0) ? 1 : 0;
}
static inline int get_presence_status(struct controller *ctrl,
struct slot *slot)
{
int presence_save = 0;
u8 hp_slot;
u32 tempdword;
hp_slot = slot->device - ctrl->slot_device_offset;
tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
presence_save = (int) ((((~tempdword) >> 23) | ((~tempdword) >> 15))
>> hp_slot) & 0x02;
return presence_save;
}
static inline int wait_for_ctrl_irq(struct controller *ctrl)
{
DECLARE_WAITQUEUE(wait, current);
int retval = 0;
dbg("%s - start\n", __func__);
add_wait_queue(&ctrl->queue, &wait);
/* Sleep for up to 1 second to wait for the LED to change. */
msleep_interruptible(1000);
remove_wait_queue(&ctrl->queue, &wait);
if (signal_pending(current))
retval = -EINTR;
dbg("%s - end\n", __func__);
return retval;
}
#include <asm/pci_x86.h>
static inline int cpqhp_routing_table_length(void)
{
BUG_ON(cpqhp_routing_table == NULL);
return ((cpqhp_routing_table->size - sizeof(struct irq_routing_table)) /
sizeof(struct irq_info));
}
#endif
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