diff options
Diffstat (limited to 'drivers/pci/hotplug/shpchp.h')
| -rw-r--r-- | drivers/pci/hotplug/shpchp.h | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h new file mode 100644 index 000000000..6e85885b5 --- /dev/null +++ b/drivers/pci/hotplug/shpchp.h @@ -0,0 +1,324 @@ +/* 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); +void 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 */ |