1 /* 2 * PCI HotPlug Core Functions 3 * 4 * Copyright (C) 1995,2001 Compaq Computer Corporation 5 * Copyright (C) 2001 Greg Kroah-Hartman ([email protected]) 6 * Copyright (C) 2001 IBM Corp. 7 * 8 * All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or (at 13 * your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 18 * NON INFRINGEMENT. See the GNU General Public License for more 19 * details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 * Send feedback to <[email protected]> 26 * 27 */ 28 #ifndef _PCI_HOTPLUG_H 29 #define _PCI_HOTPLUG_H 30 31 32 /* These values come from the PCI Hotplug Spec */ 33 enum pci_bus_speed { 34 PCI_SPEED_33MHz = 0x00, 35 PCI_SPEED_66MHz = 0x01, 36 PCI_SPEED_66MHz_PCIX = 0x02, 37 PCI_SPEED_100MHz_PCIX = 0x03, 38 PCI_SPEED_133MHz_PCIX = 0x04, 39 PCI_SPEED_66MHz_PCIX_ECC = 0x05, 40 PCI_SPEED_100MHz_PCIX_ECC = 0x06, 41 PCI_SPEED_133MHz_PCIX_ECC = 0x07, 42 PCI_SPEED_66MHz_PCIX_266 = 0x09, 43 PCI_SPEED_100MHz_PCIX_266 = 0x0a, 44 PCI_SPEED_133MHz_PCIX_266 = 0x0b, 45 PCI_SPEED_66MHz_PCIX_533 = 0x11, 46 PCI_SPEED_100MHz_PCIX_533 = 0x12, 47 PCI_SPEED_133MHz_PCIX_533 = 0x13, 48 PCI_SPEED_UNKNOWN = 0xff, 49 }; 50 51 /* These values come from the PCI Express Spec */ 52 enum pcie_link_width { 53 PCIE_LNK_WIDTH_RESRV = 0x00, 54 PCIE_LNK_X1 = 0x01, 55 PCIE_LNK_X2 = 0x02, 56 PCIE_LNK_X4 = 0x04, 57 PCIE_LNK_X8 = 0x08, 58 PCIE_LNK_X12 = 0x0C, 59 PCIE_LNK_X16 = 0x10, 60 PCIE_LNK_X32 = 0x20, 61 PCIE_LNK_WIDTH_UNKNOWN = 0xFF, 62 }; 63 64 enum pcie_link_speed { 65 PCIE_2PT5GB = 0x14, 66 PCIE_LNK_SPEED_UNKNOWN = 0xFF, 67 }; 68 69 struct hotplug_slot; 70 struct hotplug_slot_attribute { 71 struct attribute attr; 72 ssize_t (*show)(struct hotplug_slot *, char *); 73 ssize_t (*store)(struct hotplug_slot *, const char *, size_t); 74 }; 75 #define to_hotplug_attr(n) container_of(n, struct hotplug_slot_attribute, attr); 76 77 /** 78 * struct hotplug_slot_ops -the callbacks that the hotplug pci core can use 79 * @owner: The module owner of this structure 80 * @enable_slot: Called when the user wants to enable a specific pci slot 81 * @disable_slot: Called when the user wants to disable a specific pci slot 82 * @set_attention_status: Called to set the specific slot's attention LED to 83 * the specified value 84 * @hardware_test: Called to run a specified hardware test on the specified 85 * slot. 86 * @get_power_status: Called to get the current power status of a slot. 87 * If this field is NULL, the value passed in the struct hotplug_slot_info 88 * will be used when this value is requested by a user. 89 * @get_attention_status: Called to get the current attention status of a slot. 90 * If this field is NULL, the value passed in the struct hotplug_slot_info 91 * will be used when this value is requested by a user. 92 * @get_latch_status: Called to get the current latch status of a slot. 93 * If this field is NULL, the value passed in the struct hotplug_slot_info 94 * will be used when this value is requested by a user. 95 * @get_adapter_status: Called to get see if an adapter is present in the slot or not. 96 * If this field is NULL, the value passed in the struct hotplug_slot_info 97 * will be used when this value is requested by a user. 98 * @get_max_bus_speed: Called to get the max bus speed for a slot. 99 * If this field is NULL, the value passed in the struct hotplug_slot_info 100 * will be used when this value is requested by a user. 101 * @get_cur_bus_speed: Called to get the current bus speed for a slot. 102 * If this field is NULL, the value passed in the struct hotplug_slot_info 103 * will be used when this value is requested by a user. 104 * 105 * The table of function pointers that is passed to the hotplug pci core by a 106 * hotplug pci driver. These functions are called by the hotplug pci core when 107 * the user wants to do something to a specific slot (query it for information, 108 * set an LED, enable / disable power, etc.) 109 */ 110 struct hotplug_slot_ops { 111 struct module *owner; 112 int (*enable_slot) (struct hotplug_slot *slot); 113 int (*disable_slot) (struct hotplug_slot *slot); 114 int (*set_attention_status) (struct hotplug_slot *slot, u8 value); 115 int (*hardware_test) (struct hotplug_slot *slot, u32 value); 116 int (*get_power_status) (struct hotplug_slot *slot, u8 *value); 117 int (*get_attention_status) (struct hotplug_slot *slot, u8 *value); 118 int (*get_latch_status) (struct hotplug_slot *slot, u8 *value); 119 int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value); 120 int (*get_max_bus_speed) (struct hotplug_slot *slot, enum pci_bus_speed *value); 121 int (*get_cur_bus_speed) (struct hotplug_slot *slot, enum pci_bus_speed *value); 122 }; 123 124 /** 125 * struct hotplug_slot_info - used to notify the hotplug pci core of the state of the slot 126 * @power: if power is enabled or not (1/0) 127 * @attention_status: if the attention light is enabled or not (1/0) 128 * @latch_status: if the latch (if any) is open or closed (1/0) 129 * @adapter_present: if there is a pci board present in the slot or not (1/0) 130 * @address: (domain << 16 | bus << 8 | dev) 131 * 132 * Used to notify the hotplug pci core of the status of a specific slot. 133 */ 134 struct hotplug_slot_info { 135 u8 power_status; 136 u8 attention_status; 137 u8 latch_status; 138 u8 adapter_status; 139 enum pci_bus_speed max_bus_speed; 140 enum pci_bus_speed cur_bus_speed; 141 }; 142 143 /** 144 * struct hotplug_slot - used to register a physical slot with the hotplug pci core 145 * @name: the name of the slot being registered. This string must 146 * be unique amoung slots registered on this system. 147 * @ops: pointer to the &struct hotplug_slot_ops to be used for this slot 148 * @info: pointer to the &struct hotplug_slot_info for the initial values for 149 * this slot. 150 * @release: called during pci_hp_deregister to free memory allocated in a 151 * hotplug_slot structure. 152 * @private: used by the hotplug pci controller driver to store whatever it 153 * needs. 154 */ 155 struct hotplug_slot { 156 char *name; 157 struct hotplug_slot_ops *ops; 158 struct hotplug_slot_info *info; 159 void (*release) (struct hotplug_slot *slot); 160 void *private; 161 162 /* Variables below this are for use only by the hotplug pci core. */ 163 struct list_head slot_list; 164 struct pci_slot *pci_slot; 165 }; 166 #define to_hotplug_slot(n) container_of(n, struct hotplug_slot, kobj) 167 168 extern int pci_hp_register(struct hotplug_slot *, struct pci_bus *, int nr); 169 extern int pci_hp_deregister(struct hotplug_slot *slot); 170 extern int __must_check pci_hp_change_slot_info (struct hotplug_slot *slot, 171 struct hotplug_slot_info *info); 172 173 /* PCI Setting Record (Type 0) */ 174 struct hpp_type0 { 175 u32 revision; 176 u8 cache_line_size; 177 u8 latency_timer; 178 u8 enable_serr; 179 u8 enable_perr; 180 }; 181 182 /* PCI-X Setting Record (Type 1) */ 183 struct hpp_type1 { 184 u32 revision; 185 u8 max_mem_read; 186 u8 avg_max_split; 187 u16 tot_max_split; 188 }; 189 190 /* PCI Express Setting Record (Type 2) */ 191 struct hpp_type2 { 192 u32 revision; 193 u32 unc_err_mask_and; 194 u32 unc_err_mask_or; 195 u32 unc_err_sever_and; 196 u32 unc_err_sever_or; 197 u32 cor_err_mask_and; 198 u32 cor_err_mask_or; 199 u32 adv_err_cap_and; 200 u32 adv_err_cap_or; 201 u16 pci_exp_devctl_and; 202 u16 pci_exp_devctl_or; 203 u16 pci_exp_lnkctl_and; 204 u16 pci_exp_lnkctl_or; 205 u32 sec_unc_err_sever_and; 206 u32 sec_unc_err_sever_or; 207 u32 sec_unc_err_mask_and; 208 u32 sec_unc_err_mask_or; 209 }; 210 211 struct hotplug_params { 212 struct hpp_type0 *t0; /* Type0: NULL if not available */ 213 struct hpp_type1 *t1; /* Type1: NULL if not available */ 214 struct hpp_type2 *t2; /* Type2: NULL if not available */ 215 struct hpp_type0 type0_data; 216 struct hpp_type1 type1_data; 217 struct hpp_type2 type2_data; 218 }; 219 220 #ifdef CONFIG_ACPI 221 #include <acpi/acpi.h> 222 #include <acpi/acpi_bus.h> 223 #include <acpi/actypes.h> 224 extern acpi_status acpi_get_hp_params_from_firmware(struct pci_bus *bus, 225 struct hotplug_params *hpp); 226 int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags); 227 int acpi_root_bridge(acpi_handle handle); 228 #endif 229 #endif 230 231