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linux/drivers/pci/hotplug/shpchp.h

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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Standard Hot Plug Controller Driver
*
* Copyright (C) 1995,2001 Compaq Computer Corporation
* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2001 IBM
* Copyright (C) 2003-2004 Intel Corporation
*
* All rights reserved.
*
* Send feedback to <greg@kroah.com>,<kristen.c.accardi@intel.com>
*
*/
#ifndef _SHPCHP_H
#define _SHPCHP_H
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/delay.h>
#include <linux/sched/signal.h> /* signal_pending(), struct timer_list */
#include <linux/mutex.h>
#include <linux/workqueue.h>
#if !defined(MODULE)
#define MY_NAME "shpchp"
#else
#define MY_NAME THIS_MODULE->name
#endif
extern bool shpchp_poll_mode;
extern int shpchp_poll_time;
extern bool shpchp_debug;
#define dbg(format, arg...) \
do { \
if (shpchp_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 (shpchp_debug) \
pci_printk(KERN_DEBUG, ctrl->pci_dev, \
format, ## arg); \
} while (0)
#define ctrl_err(ctrl, format, arg...) \
pci_err(ctrl->pci_dev, format, ## arg)
#define ctrl_info(ctrl, format, arg...) \
pci_info(ctrl->pci_dev, format, ## arg)
#define ctrl_warn(ctrl, format, arg...) \
pci_warn(ctrl->pci_dev, format, ## arg)
#define SLOT_NAME_SIZE 10
struct slot {
u8 bus;
u8 device;
u16 status;
u32 number;
u8 is_a_board;
u8 state;
u8 attention_save;
u8 presence_save;
u8 latch_save;
u8 pwr_save;
struct controller *ctrl;
const struct hpc_ops *hpc_ops;
struct hotplug_slot hotplug_slot;
struct list_head slot_list;
struct delayed_work work; /* work for button event */
struct mutex lock;
struct workqueue_struct *wq;
u8 hp_slot;
};
struct event_info {
u32 event_type;
struct slot *p_slot;
struct work_struct work;
};
struct controller {
struct mutex crit_sect; /* critical section mutex */
struct mutex cmd_lock; /* command lock */
int num_slots; /* Number of slots on ctlr */
int slot_num_inc; /* 1 or -1 */
struct pci_dev *pci_dev;
struct list_head slot_list;
const struct hpc_ops *hpc_ops;
wait_queue_head_t queue; /* sleep & wake process */
u8 slot_device_offset;
u32 pcix_misc2_reg; /* for amd pogo errata */
u32 first_slot; /* First physical slot number */
u32 cap_offset;
unsigned long mmio_base;
unsigned long mmio_size;
void __iomem *creg;
struct timer_list poll_timer;
};
/* Define AMD SHPC ID */
#define PCI_DEVICE_ID_AMD_POGO_7458 0x7458
/* AMD PCI-X bridge registers */
#define PCIX_MEM_BASE_LIMIT_OFFSET 0x1C
#define PCIX_MISCII_OFFSET 0x48
#define PCIX_MISC_BRIDGE_ERRORS_OFFSET 0x80
/* AMD PCIX_MISCII masks and offsets */
#define PERRNONFATALENABLE_MASK 0x00040000
#define PERRFATALENABLE_MASK 0x00080000
#define PERRFLOODENABLE_MASK 0x00100000
#define SERRNONFATALENABLE_MASK 0x00200000
#define SERRFATALENABLE_MASK 0x00400000
/* AMD PCIX_MISC_BRIDGE_ERRORS masks and offsets */
#define PERR_OBSERVED_MASK 0x00000001
/* AMD PCIX_MEM_BASE_LIMIT masks */
#define RSE_MASK 0x40000000
#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
/* 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
int __must_check shpchp_create_ctrl_files(struct controller *ctrl);
void shpchp_remove_ctrl_files(struct controller *ctrl);
int shpchp_sysfs_enable_slot(struct slot *slot);
int shpchp_sysfs_disable_slot(struct slot *slot);
u8 shpchp_handle_attention_button(u8 hp_slot, struct controller *ctrl);
u8 shpchp_handle_switch_change(u8 hp_slot, struct controller *ctrl);
u8 shpchp_handle_presence_change(u8 hp_slot, struct controller *ctrl);
u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
int shpchp_configure_device(struct slot *p_slot);
int shpchp_unconfigure_device(struct slot *p_slot);
void cleanup_slots(struct controller *ctrl);
void shpchp_queue_pushbutton_work(struct work_struct *work);
int shpc_init(struct controller *ctrl, struct pci_dev *pdev);
static inline const char *slot_name(struct slot *slot)
{
return hotplug_slot_name(&slot->hotplug_slot);
}
struct ctrl_reg {
volatile u32 base_offset;
volatile u32 slot_avail1;
volatile u32 slot_avail2;
volatile u32 slot_config;
volatile u16 sec_bus_config;
volatile u8 msi_ctrl;
volatile u8 prog_interface;
volatile u16 cmd;
volatile u16 cmd_status;
volatile u32 intr_loc;
volatile u32 serr_loc;
volatile u32 serr_intr_enable;
volatile u32 slot1;
} __attribute__ ((packed));
/* offsets to the controller registers based on the above structure layout */
enum ctrl_offsets {
BASE_OFFSET = offsetof(struct ctrl_reg, base_offset),
SLOT_AVAIL1 = offsetof(struct ctrl_reg, slot_avail1),
SLOT_AVAIL2 = offsetof(struct ctrl_reg, slot_avail2),
SLOT_CONFIG = offsetof(struct ctrl_reg, slot_config),
SEC_BUS_CONFIG = offsetof(struct ctrl_reg, sec_bus_config),
MSI_CTRL = offsetof(struct ctrl_reg, msi_ctrl),
PROG_INTERFACE = offsetof(struct ctrl_reg, prog_interface),
CMD = offsetof(struct ctrl_reg, cmd),
CMD_STATUS = offsetof(struct ctrl_reg, cmd_status),
INTR_LOC = offsetof(struct ctrl_reg, intr_loc),
SERR_LOC = offsetof(struct ctrl_reg, serr_loc),
SERR_INTR_ENABLE = offsetof(struct ctrl_reg, serr_intr_enable),
SLOT1 = offsetof(struct ctrl_reg, slot1),
};
static inline struct slot *get_slot(struct hotplug_slot *hotplug_slot)
{
return container_of(hotplug_slot, struct slot, hotplug_slot);
}
static inline struct slot *shpchp_find_slot(struct controller *ctrl, u8 device)
{
struct slot *slot;
list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
if (slot->device == device)
return slot;
}
ctrl_err(ctrl, "Slot (device=0x%02x) not found\n", device);
return NULL;
}
static inline void amd_pogo_errata_save_misc_reg(struct slot *p_slot)
{
u32 pcix_misc2_temp;
/* save MiscII register */
pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, &pcix_misc2_temp);
p_slot->ctrl->pcix_misc2_reg = pcix_misc2_temp;
/* clear SERR/PERR enable bits */
pcix_misc2_temp &= ~SERRFATALENABLE_MASK;
pcix_misc2_temp &= ~SERRNONFATALENABLE_MASK;
pcix_misc2_temp &= ~PERRFLOODENABLE_MASK;
pcix_misc2_temp &= ~PERRFATALENABLE_MASK;
pcix_misc2_temp &= ~PERRNONFATALENABLE_MASK;
pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, pcix_misc2_temp);
}
static inline void amd_pogo_errata_restore_misc_reg(struct slot *p_slot)
{
u32 pcix_misc2_temp;
u32 pcix_bridge_errors_reg;
u32 pcix_mem_base_reg;
u8 perr_set;
u8 rse_set;
/* write-one-to-clear Bridge_Errors[ PERR_OBSERVED ] */
pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISC_BRIDGE_ERRORS_OFFSET, &pcix_bridge_errors_reg);
perr_set = pcix_bridge_errors_reg & PERR_OBSERVED_MASK;
if (perr_set) {
ctrl_dbg(p_slot->ctrl,
"Bridge_Errors[ PERR_OBSERVED = %08X] (W1C)\n",
perr_set);
pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISC_BRIDGE_ERRORS_OFFSET, perr_set);
}
/* write-one-to-clear Memory_Base_Limit[ RSE ] */
pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MEM_BASE_LIMIT_OFFSET, &pcix_mem_base_reg);
rse_set = pcix_mem_base_reg & RSE_MASK;
if (rse_set) {
ctrl_dbg(p_slot->ctrl, "Memory_Base_Limit[ RSE ] (W1C)\n");
pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MEM_BASE_LIMIT_OFFSET, rse_set);
}
/* restore MiscII register */
pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, &pcix_misc2_temp);
if (p_slot->ctrl->pcix_misc2_reg & SERRFATALENABLE_MASK)
pcix_misc2_temp |= SERRFATALENABLE_MASK;
else
pcix_misc2_temp &= ~SERRFATALENABLE_MASK;
if (p_slot->ctrl->pcix_misc2_reg & SERRNONFATALENABLE_MASK)
pcix_misc2_temp |= SERRNONFATALENABLE_MASK;
else
pcix_misc2_temp &= ~SERRNONFATALENABLE_MASK;
if (p_slot->ctrl->pcix_misc2_reg & PERRFLOODENABLE_MASK)
pcix_misc2_temp |= PERRFLOODENABLE_MASK;
else
pcix_misc2_temp &= ~PERRFLOODENABLE_MASK;
if (p_slot->ctrl->pcix_misc2_reg & PERRFATALENABLE_MASK)
pcix_misc2_temp |= PERRFATALENABLE_MASK;
else
pcix_misc2_temp &= ~PERRFATALENABLE_MASK;
if (p_slot->ctrl->pcix_misc2_reg & PERRNONFATALENABLE_MASK)
pcix_misc2_temp |= PERRNONFATALENABLE_MASK;
else
pcix_misc2_temp &= ~PERRNONFATALENABLE_MASK;
pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, pcix_misc2_temp);
}
struct hpc_ops {
int (*power_on_slot)(struct slot *slot);
int (*slot_enable)(struct slot *slot);
int (*slot_disable)(struct slot *slot);
int (*set_bus_speed_mode)(struct slot *slot, enum pci_bus_speed speed);
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_adapter_speed)(struct slot *slot, enum pci_bus_speed *speed);
int (*get_mode1_ECC_cap)(struct slot *slot, u8 *mode);
int (*get_prog_int)(struct slot *slot, u8 *prog_int);
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_cmd_status)(struct controller *ctrl);
};
#endif /* _SHPCHP_H */
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