87fcf12e84
We used to first parse all the _HPP and _HPX tables before using the information to program registers of PCIe devices. Up through HPX Type 2, there was only one structure of each type, so we could cheat and store it on the stack. With HPX Type 3 we get an arbitrary number of entries, so the above model doesn't scale that well. Instead of parsing all tables at once, parse and program each entry separately. For _HPP and _HPX Types 0 through 2, this is functionally equivalent. The change enables the upcoming _HPX Type 3 to integrate more easily. Link: https://lore.kernel.org/lkml/20190208162414.3996-3-mr.nuke.me@gmail.com Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> [bhelgaas: fix build errors] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
162 lines
5.5 KiB
C
162 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* PCI HotPlug Core Functions
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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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*
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* All rights reserved.
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*
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* Send feedback to <kristen.c.accardi@intel.com>
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*
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*/
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#ifndef _PCI_HOTPLUG_H
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#define _PCI_HOTPLUG_H
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/**
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* struct hotplug_slot_ops -the callbacks that the hotplug pci core can use
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* @enable_slot: Called when the user wants to enable a specific pci slot
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* @disable_slot: Called when the user wants to disable a specific pci slot
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* @set_attention_status: Called to set the specific slot's attention LED to
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* the specified value
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* @hardware_test: Called to run a specified hardware test on the specified
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* slot.
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* @get_power_status: Called to get the current power status of a slot.
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* @get_attention_status: Called to get the current attention status of a slot.
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* @get_latch_status: Called to get the current latch status of a slot.
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* @get_adapter_status: Called to get see if an adapter is present in the slot or not.
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* @reset_slot: Optional interface to allow override of a bus reset for the
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* slot for cases where a secondary bus reset can result in spurious
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* hotplug events or where a slot can be reset independent of the bus.
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*
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* The table of function pointers that is passed to the hotplug pci core by a
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* hotplug pci driver. These functions are called by the hotplug pci core when
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* the user wants to do something to a specific slot (query it for information,
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* set an LED, enable / disable power, etc.)
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*/
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struct hotplug_slot_ops {
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int (*enable_slot) (struct hotplug_slot *slot);
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int (*disable_slot) (struct hotplug_slot *slot);
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int (*set_attention_status) (struct hotplug_slot *slot, u8 value);
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int (*hardware_test) (struct hotplug_slot *slot, u32 value);
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int (*get_power_status) (struct hotplug_slot *slot, u8 *value);
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int (*get_attention_status) (struct hotplug_slot *slot, u8 *value);
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int (*get_latch_status) (struct hotplug_slot *slot, u8 *value);
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int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value);
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int (*reset_slot) (struct hotplug_slot *slot, int probe);
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};
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/**
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* struct hotplug_slot - used to register a physical slot with the hotplug pci core
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* @ops: pointer to the &struct hotplug_slot_ops to be used for this slot
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* @owner: The module owner of this structure
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* @mod_name: The module name (KBUILD_MODNAME) of this structure
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*/
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struct hotplug_slot {
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const struct hotplug_slot_ops *ops;
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/* Variables below this are for use only by the hotplug pci core. */
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struct list_head slot_list;
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struct pci_slot *pci_slot;
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struct module *owner;
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const char *mod_name;
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};
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static inline const char *hotplug_slot_name(const struct hotplug_slot *slot)
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{
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return pci_slot_name(slot->pci_slot);
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}
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int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *pbus, int nr,
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const char *name, struct module *owner,
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const char *mod_name);
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int __pci_hp_initialize(struct hotplug_slot *slot, struct pci_bus *bus, int nr,
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const char *name, struct module *owner,
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const char *mod_name);
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int pci_hp_add(struct hotplug_slot *slot);
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void pci_hp_del(struct hotplug_slot *slot);
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void pci_hp_destroy(struct hotplug_slot *slot);
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void pci_hp_deregister(struct hotplug_slot *slot);
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/* use a define to avoid include chaining to get THIS_MODULE & friends */
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#define pci_hp_register(slot, pbus, devnr, name) \
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__pci_hp_register(slot, pbus, devnr, name, THIS_MODULE, KBUILD_MODNAME)
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#define pci_hp_initialize(slot, bus, nr, name) \
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__pci_hp_initialize(slot, bus, nr, name, THIS_MODULE, KBUILD_MODNAME)
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/* PCI Setting Record (Type 0) */
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struct hpp_type0 {
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u32 revision;
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u8 cache_line_size;
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u8 latency_timer;
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u8 enable_serr;
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u8 enable_perr;
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};
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/* PCI-X Setting Record (Type 1) */
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struct hpp_type1 {
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u32 revision;
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u8 max_mem_read;
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u8 avg_max_split;
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u16 tot_max_split;
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};
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/* PCI Express Setting Record (Type 2) */
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struct hpp_type2 {
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u32 revision;
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u32 unc_err_mask_and;
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u32 unc_err_mask_or;
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u32 unc_err_sever_and;
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u32 unc_err_sever_or;
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u32 cor_err_mask_and;
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u32 cor_err_mask_or;
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u32 adv_err_cap_and;
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u32 adv_err_cap_or;
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u16 pci_exp_devctl_and;
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u16 pci_exp_devctl_or;
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u16 pci_exp_lnkctl_and;
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u16 pci_exp_lnkctl_or;
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u32 sec_unc_err_sever_and;
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u32 sec_unc_err_sever_or;
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u32 sec_unc_err_mask_and;
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u32 sec_unc_err_mask_or;
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};
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struct hotplug_program_ops {
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void (*program_type0)(struct pci_dev *dev, struct hpp_type0 *hpp);
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void (*program_type1)(struct pci_dev *dev, struct hpp_type1 *hpp);
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void (*program_type2)(struct pci_dev *dev, struct hpp_type2 *hpp);
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};
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#ifdef CONFIG_ACPI
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#include <linux/acpi.h>
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int pci_acpi_program_hp_params(struct pci_dev *dev,
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const struct hotplug_program_ops *hp_ops);
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bool pciehp_is_native(struct pci_dev *bridge);
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int acpi_get_hp_hw_control_from_firmware(struct pci_dev *bridge);
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bool shpchp_is_native(struct pci_dev *bridge);
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int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle);
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int acpi_pci_detect_ejectable(acpi_handle handle);
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#else
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static inline int pci_acpi_program_hp_params(struct pci_dev *dev,
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const struct hotplug_program_ops *hp_ops)
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{
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return -ENODEV;
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}
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static inline int acpi_get_hp_hw_control_from_firmware(struct pci_dev *bridge)
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{
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return 0;
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}
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static inline bool pciehp_is_native(struct pci_dev *bridge) { return true; }
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static inline bool shpchp_is_native(struct pci_dev *bridge) { return true; }
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#endif
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static inline bool hotplug_is_native(struct pci_dev *bridge)
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{
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return pciehp_is_native(bridge) || shpchp_is_native(bridge);
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}
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#endif
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