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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * pci.h
3 *
4 * PCI defines and function prototypes
5 * Copyright 1994, Drew Eckhardt
6 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
7 *
8 * For more information, please consult the following manuals (look at
9 * http://www.pcisig.com/ for how to get them):
10 *
11 * PCI BIOS Specification
12 * PCI Local Bus Specification
13 * PCI to PCI Bridge Specification
14 * PCI System Design Guide
15 */
16
17#ifndef LINUX_PCI_H
18#define LINUX_PCI_H
19
Alex Chiangf46753c2008-06-10 15:28:50 -060020#include <linux/pci_regs.h> /* The pci register defines */
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
Linus Torvalds1da177e2005-04-16 15:20:36 -070022/*
23 * The PCI interface treats multi-function devices as independent
24 * devices. The slot/function address of each device is encoded
25 * in a single byte as follows:
26 *
27 * 7:3 = slot
28 * 2:0 = function
29 */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -080030#define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
32#define PCI_FUNC(devfn) ((devfn) & 0x07)
33
34/* Ioctls for /proc/bus/pci/X/Y nodes. */
35#define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
36#define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
37#define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
38#define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
39#define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
40
41#ifdef __KERNEL__
42
David Woodhouse778382e2006-04-29 01:46:02 +010043#include <linux/mod_devicetable.h>
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/types.h>
Sam Ravnborg98db6f12008-04-29 22:38:48 +020046#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/ioport.h>
48#include <linux/list.h>
Andrew Morton4a7fb632006-08-14 22:43:17 -070049#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#include <linux/errno.h>
Alex Chiangf46753c2008-06-10 15:28:50 -060051#include <linux/kobject.h>
Arun Sharma600634972011-07-26 16:09:06 -070052#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include <linux/device.h>
Stephen Rothwell1388cc92008-10-22 13:39:55 +110054#include <linux/io.h>
Yu Zhao74bb1bc2009-03-20 11:25:16 +080055#include <linux/irqreturn.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Adrian Bunk7e7a43c2006-12-19 13:12:07 -080057/* Include the ID list */
58#include <linux/pci_ids.h>
59
Alex Chiangf46753c2008-06-10 15:28:50 -060060/* pci_slot represents a physical slot */
61struct pci_slot {
62 struct pci_bus *bus; /* The bus this slot is on */
63 struct list_head list; /* node in list of slots on this bus */
64 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
65 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
66 struct kobject kobj;
67};
68
Alex Chiang0ad772e2008-10-20 17:41:07 -060069static inline const char *pci_slot_name(const struct pci_slot *slot)
70{
71 return kobject_name(&slot->kobj);
72}
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074/* File state for mmap()s on /proc/bus/pci/X/Y */
75enum pci_mmap_state {
76 pci_mmap_io,
77 pci_mmap_mem
78};
79
80/* This defines the direction arg to the DMA mapping routines. */
81#define PCI_DMA_BIDIRECTIONAL 0
82#define PCI_DMA_TODEVICE 1
83#define PCI_DMA_FROMDEVICE 2
84#define PCI_DMA_NONE 3
85
Yu Zhaofde09c62008-11-22 02:39:32 +080086/*
87 * For PCI devices, the region numbers are assigned this way:
88 */
89enum {
90 /* #0-5: standard PCI resources */
91 PCI_STD_RESOURCES,
92 PCI_STD_RESOURCE_END = 5,
93
94 /* #6: expansion ROM resource */
95 PCI_ROM_RESOURCE,
96
Yu Zhaod1b054d2009-03-20 11:25:11 +080097 /* device specific resources */
98#ifdef CONFIG_PCI_IOV
99 PCI_IOV_RESOURCES,
100 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
101#endif
102
Yu Zhaofde09c62008-11-22 02:39:32 +0800103 /* resources assigned to buses behind the bridge */
104#define PCI_BRIDGE_RESOURCE_NUM 4
105
106 PCI_BRIDGE_RESOURCES,
107 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
108 PCI_BRIDGE_RESOURCE_NUM - 1,
109
110 /* total resources associated with a PCI device */
111 PCI_NUM_RESOURCES,
112
113 /* preserve this for compatibility */
Yinghai Lucda57bf2012-01-04 15:49:45 -0800114 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
Yu Zhaofde09c62008-11-22 02:39:32 +0800115};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117typedef int __bitwise pci_power_t;
118
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700119#define PCI_D0 ((pci_power_t __force) 0)
120#define PCI_D1 ((pci_power_t __force) 1)
121#define PCI_D2 ((pci_power_t __force) 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122#define PCI_D3hot ((pci_power_t __force) 3)
123#define PCI_D3cold ((pci_power_t __force) 4)
Daniel Ritz3fe9d192005-08-17 15:32:19 -0700124#define PCI_UNKNOWN ((pci_power_t __force) 5)
Pavel Machek438510f2005-04-16 15:25:24 -0700125#define PCI_POWER_ERROR ((pci_power_t __force) -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Alan Stern00240c32009-04-27 13:33:16 -0400127/* Remember to update this when the list above changes! */
128extern const char *pci_power_names[];
129
130static inline const char *pci_power_name(pci_power_t state)
131{
132 return pci_power_names[1 + (int) state];
133}
134
Huang Ying448bd852012-06-23 10:23:51 +0800135#define PCI_PM_D2_DELAY 200
136#define PCI_PM_D3_WAIT 10
137#define PCI_PM_D3COLD_WAIT 100
138#define PCI_PM_BUS_WAIT 50
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100139
linas392a1ce2005-11-16 17:10:41 -0600140/** The pci_channel state describes connectivity between the CPU and
141 * the pci device. If some PCI bus between here and the pci device
142 * has crashed or locked up, this info is reflected here.
143 */
144typedef unsigned int __bitwise pci_channel_state_t;
145
146enum pci_channel_state {
147 /* I/O channel is in normal state */
148 pci_channel_io_normal = (__force pci_channel_state_t) 1,
149
150 /* I/O to channel is blocked */
151 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
152
153 /* PCI card is dead */
154 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
155};
156
Brian Kingf7bdd122007-04-06 16:39:36 -0500157typedef unsigned int __bitwise pcie_reset_state_t;
158
159enum pcie_reset_state {
160 /* Reset is NOT asserted (Use to deassert reset) */
161 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
162
163 /* Use #PERST to reset PCI-E device */
164 pcie_warm_reset = (__force pcie_reset_state_t) 2,
165
166 /* Use PCI-E Hot Reset to reset device */
167 pcie_hot_reset = (__force pcie_reset_state_t) 3
168};
169
David Millerba698ad2007-10-25 01:16:30 -0700170typedef unsigned short __bitwise pci_dev_flags_t;
171enum pci_dev_flags {
172 /* INTX_DISABLE in PCI_COMMAND register disables MSI
173 * generation too.
174 */
175 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
Alan Cox979b1792008-07-24 17:18:38 +0100176 /* Device configuration is irrevocably lost if disabled into D3 */
177 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
Greg Rose67778292011-07-22 05:46:07 +0000178 /* Provide indication device is assigned by a Virtual Machine Manager */
179 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) 4,
David Millerba698ad2007-10-25 01:16:30 -0700180};
181
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200182enum pci_irq_reroute_variant {
183 INTEL_IRQ_REROUTE_VARIANT = 1,
184 MAX_IRQ_REROUTE_VARIANTS = 3
185};
186
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200187typedef unsigned short __bitwise pci_bus_flags_t;
188enum pci_bus_flags {
Peter Orubad556ad42007-05-15 13:59:13 +0200189 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
190 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200191};
192
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500193/* Based on the PCI Hotplug Spec, but some values are made up by us */
194enum pci_bus_speed {
195 PCI_SPEED_33MHz = 0x00,
196 PCI_SPEED_66MHz = 0x01,
197 PCI_SPEED_66MHz_PCIX = 0x02,
198 PCI_SPEED_100MHz_PCIX = 0x03,
199 PCI_SPEED_133MHz_PCIX = 0x04,
200 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
201 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
202 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
203 PCI_SPEED_66MHz_PCIX_266 = 0x09,
204 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
205 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
Matthew Wilcox45b4cdd52009-12-13 08:11:34 -0500206 AGP_UNKNOWN = 0x0c,
207 AGP_1X = 0x0d,
208 AGP_2X = 0x0e,
209 AGP_4X = 0x0f,
210 AGP_8X = 0x10,
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500211 PCI_SPEED_66MHz_PCIX_533 = 0x11,
212 PCI_SPEED_100MHz_PCIX_533 = 0x12,
213 PCI_SPEED_133MHz_PCIX_533 = 0x13,
214 PCIE_SPEED_2_5GT = 0x14,
215 PCIE_SPEED_5_0GT = 0x15,
Matthew Wilcox9dfd97f2009-12-13 08:11:35 -0500216 PCIE_SPEED_8_0GT = 0x16,
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500217 PCI_SPEED_UNKNOWN = 0xff,
218};
219
Alex Williamson24a4742f2011-05-10 10:02:11 -0600220struct pci_cap_saved_data {
221 char cap_nr;
222 unsigned int size;
223 u32 data[0];
224};
225
Shaohua Li41017f02006-02-08 17:11:38 +0800226struct pci_cap_saved_state {
227 struct hlist_node next;
Alex Williamson24a4742f2011-05-10 10:02:11 -0600228 struct pci_cap_saved_data cap;
Shaohua Li41017f02006-02-08 17:11:38 +0800229};
230
Shaohua Li7d715a62008-02-25 09:46:41 +0800231struct pcie_link_state;
Jesse Barnesee69439c2008-04-28 12:30:35 -0700232struct pci_vpd;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800233struct pci_sriov;
Yu Zhao302b4212009-05-18 13:51:32 +0800234struct pci_ats;
Jesse Barnesee69439c2008-04-28 12:30:35 -0700235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236/*
237 * The pci_dev structure is used to describe PCI devices.
238 */
239struct pci_dev {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 struct list_head bus_list; /* node in per-bus list */
241 struct pci_bus *bus; /* bus this device is on */
242 struct pci_bus *subordinate; /* bus this device bridges to */
243
244 void *sysdata; /* hook for sys-specific extension */
245 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
Alex Chiangf46753c2008-06-10 15:28:50 -0600246 struct pci_slot *slot; /* Physical slot this device is in */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
248 unsigned int devfn; /* encoded device & function index */
249 unsigned short vendor;
250 unsigned short device;
251 unsigned short subsystem_vendor;
252 unsigned short subsystem_device;
253 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
Auke Kokb8a3a522007-06-08 15:46:30 -0700254 u8 revision; /* PCI revision, low byte of class word */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
Kenji Kaneshige0efea002009-11-05 12:05:11 +0900256 u8 pcie_cap; /* PCI-E capability offset */
Jon Masonb03e7492011-07-20 15:20:54 -0500257 u8 pcie_type:4; /* PCI-E device/port type */
258 u8 pcie_mpss:3; /* PCI-E Max Payload Size Supported */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 u8 rom_base_reg; /* which config register controls the ROM */
Kristen Accardiffeff782005-11-02 16:24:32 -0800260 u8 pin; /* which interrupt pin this device uses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262 struct pci_driver *driver; /* which driver has allocated this device */
263 u64 dma_mask; /* Mask of the bits of bus address this
264 device implements. Normally this is
265 0xffffffff. You only need to change
266 this if your device has broken DMA
267 or supports 64-bit transfers. */
268
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800269 struct device_dma_parameters dma_parms;
270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 pci_power_t current_state; /* Current operating state. In ACPI-speak,
272 this is D0-D3, D0 being fully functional,
273 and D3 being off. */
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200274 int pm_cap; /* PM capability offset in the
275 configuration space */
276 unsigned int pme_support:5; /* Bitmask of states from which PME#
277 can be generated */
Rafael J. Wysockic7f48652010-02-17 23:39:08 +0100278 unsigned int pme_interrupt:1;
Rafael J. Wysocki379021d2011-10-03 23:16:33 +0200279 unsigned int pme_poll:1; /* Poll device's PME status bit */
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200280 unsigned int d1_support:1; /* Low power state D1 is supported */
281 unsigned int d2_support:1; /* Low power state D2 is supported */
Huang Ying448bd852012-06-23 10:23:51 +0800282 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
283 unsigned int no_d3cold:1; /* D3cold is forbidden */
284 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
Jacob Pan253d2e52010-07-16 10:19:22 -0700285 unsigned int mmio_always_on:1; /* disallow turning off io/mem
286 decoding during bar sizing */
Rafael J. Wysockie80bb092009-09-08 23:14:49 +0200287 unsigned int wakeup_prepared:1;
Huang Ying448bd852012-06-23 10:23:51 +0800288 unsigned int runtime_d3cold:1; /* whether go through runtime
289 D3cold, not set for devices
290 powered on/off by the
291 corresponding bridge */
Rafael J. Wysocki1ae861e2009-12-31 12:15:54 +0100292 unsigned int d3_delay; /* D3->D0 transition time in ms */
Huang Ying448bd852012-06-23 10:23:51 +0800293 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Shaohua Li7d715a62008-02-25 09:46:41 +0800295#ifdef CONFIG_PCIEASPM
296 struct pcie_link_state *link_state; /* ASPM link state. */
297#endif
298
linas392a1ce2005-11-16 17:10:41 -0600299 pci_channel_state_t error_state; /* current connectivity state */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 struct device dev; /* Generic device interface */
301
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 int cfg_size; /* Size of configuration space */
303
304 /*
305 * Instead of touching interrupt line and base address registers
306 * directly, use the values stored here. They might be different!
307 */
308 unsigned int irq;
309 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
310
311 /* These fields are used by common fixups */
312 unsigned int transparent:1; /* Transparent PCI bridge */
313 unsigned int multifunction:1;/* Part of multi-function device */
314 /* keep track of device state */
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -0800315 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 unsigned int is_busmaster:1; /* device is busmaster */
Kristen Accardi4602b882005-08-16 15:15:58 -0700317 unsigned int no_msi:1; /* device may not use msi */
Jan Kiszkafb51ccb2011-11-04 09:45:59 +0100318 unsigned int block_cfg_access:1; /* config space access is blocked */
Doug Thompsonbd8481e2006-05-08 17:06:09 -0700319 unsigned int broken_parity_status:1; /* Device generates false positive parity */
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200320 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
Shaohua Li99dc8042006-05-26 10:58:27 +0800321 unsigned int msi_enabled:1;
322 unsigned int msix_enabled:1;
Yu Zhao58c3a722008-10-14 14:02:53 +0800323 unsigned int ari_enabled:1; /* ARI forwarding */
Tejun Heo9ac78492007-01-20 16:00:26 +0900324 unsigned int is_managed:1;
Kenji Kaneshige6d3be842010-02-09 12:21:27 +0900325 unsigned int is_pcie:1; /* Obsolete. Will be removed.
326 Use pci_is_pcie() instead */
Mike Mason260d7032009-07-30 15:33:21 -0700327 unsigned int needs_freset:1; /* Dev requires fundamental reset */
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100328 unsigned int state_saved:1;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800329 unsigned int is_physfn:1;
Yu Zhaodd7cc442009-03-20 11:25:15 +0800330 unsigned int is_virtfn:1;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +0300331 unsigned int reset_fn:1;
Eric W. Biederman28760482009-09-09 14:09:24 -0700332 unsigned int is_hotplug_bridge:1;
Huang Yingaffb72c2010-05-18 14:35:16 +0800333 unsigned int __aer_firmware_first_valid:1;
334 unsigned int __aer_firmware_first:1;
Bjorn Helgaasfbebb9f2012-06-16 14:40:22 -0600335 unsigned int broken_intx_masking:1;
Bjorn Helgaas2b28ae12012-07-09 13:38:57 -0600336 unsigned int io_window_1k:1; /* Intel P2P bridge 1K I/O windows */
David Millerba698ad2007-10-25 01:16:30 -0700337 pci_dev_flags_t dev_flags;
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800338 atomic_t enable_cnt; /* pci_enable_device has been called */
Kristen Accardi4602b882005-08-16 15:15:58 -0700339
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 u32 saved_config_space[16]; /* config space saved at suspend time */
Shaohua Li41017f02006-02-08 17:11:38 +0800341 struct hlist_head saved_cap_space;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
343 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
344 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700345 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700346#ifdef CONFIG_PCI_MSI
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000347 struct list_head msi_list;
Neil Hormanda8d1c82011-10-06 14:08:18 -0400348 struct kset *msi_kset;
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700349#endif
Ben Hutchings94e61082008-03-05 16:52:39 +0000350 struct pci_vpd *vpd;
Joerg Roedel466b3dd2011-10-30 16:35:08 +0100351#ifdef CONFIG_PCI_ATS
Yu Zhaodd7cc442009-03-20 11:25:15 +0800352 union {
353 struct pci_sriov *sriov; /* SR-IOV capability related */
354 struct pci_dev *physfn; /* the PF this VF is associated with */
355 };
Yu Zhao302b4212009-05-18 13:51:32 +0800356 struct pci_ats *ats; /* Address Translation Service */
Yu Zhaod1b054d2009-03-20 11:25:11 +0800357#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358};
359
Yinghaidda56542010-04-09 01:07:55 +0100360static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
361{
362#ifdef CONFIG_PCI_IOV
363 if (dev->is_virtfn)
364 dev = dev->physfn;
365#endif
366
367 return dev;
368}
369
Michael Ellerman65891212007-04-05 17:19:08 +1000370extern struct pci_dev *alloc_pci_dev(void);
371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372#define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
373#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
374#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
375
Linas Vepstasa7369f12006-12-12 16:55:59 -0600376static inline int pci_channel_offline(struct pci_dev *pdev)
377{
378 return (pdev->error_state != pci_channel_io_normal);
379}
380
Yinghai Lu67cdc822012-05-17 18:51:12 -0700381extern struct resource busn_resource;
382
Bjorn Helgaas0efd5aa2012-02-23 20:19:00 -0700383struct pci_host_bridge_window {
384 struct list_head list;
385 struct resource *res; /* host bridge aperture (CPU address) */
386 resource_size_t offset; /* bus address + offset = CPU address */
387};
Shaohua Li41017f02006-02-08 17:11:38 +0800388
Bjorn Helgaas5a21d702012-02-23 20:18:59 -0700389struct pci_host_bridge {
Yinghai Lu7b543662012-04-02 18:31:53 -0700390 struct device dev;
Bjorn Helgaas5a21d702012-02-23 20:18:59 -0700391 struct pci_bus *bus; /* root bus */
Bjorn Helgaas0efd5aa2012-02-23 20:19:00 -0700392 struct list_head windows; /* pci_host_bridge_windows */
Yinghai Lu4fa26492012-04-02 18:31:53 -0700393 void (*release_fn)(struct pci_host_bridge *);
394 void *release_data;
Bjorn Helgaas5a21d702012-02-23 20:18:59 -0700395};
Shaohua Li41017f02006-02-08 17:11:38 +0800396
Yinghai Lu7b543662012-04-02 18:31:53 -0700397#define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
Yinghai Lu4fa26492012-04-02 18:31:53 -0700398void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
399 void (*release_fn)(struct pci_host_bridge *),
400 void *release_data);
Yinghai Lu7b543662012-04-02 18:31:53 -0700401
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700402/*
403 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
404 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
405 * buses below host bridges or subtractive decode bridges) go in the list.
406 * Use pci_bus_for_each_resource() to iterate through all the resources.
407 */
408
409/*
410 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
411 * and there's no way to program the bridge with the details of the window.
412 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
413 * decode bit set, because they are explicit and can be programmed with _SRS.
414 */
415#define PCI_SUBTRACTIVE_DECODE 0x1
416
417struct pci_bus_resource {
418 struct list_head list;
419 struct resource *res;
420 unsigned int flags;
421};
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700422
423#define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
425struct pci_bus {
426 struct list_head node; /* node in list of buses */
427 struct pci_bus *parent; /* parent bus this bridge is on */
428 struct list_head children; /* list of child buses */
429 struct list_head devices; /* list of devices on this bus */
430 struct pci_dev *self; /* bridge device as seen by parent */
Alex Chiangf46753c2008-06-10 15:28:50 -0600431 struct list_head slots; /* list of slots on this bus */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700432 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
433 struct list_head resources; /* address space routed to this bus */
Yinghai Lu92f02432012-05-17 18:51:11 -0700434 struct resource busn_res; /* bus numbers routed to this bus */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
436 struct pci_ops *ops; /* configuration access functions */
437 void *sysdata; /* hook for sys-specific extension */
438 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
439
440 unsigned char number; /* bus number */
441 unsigned char primary; /* number of primary bridge */
Matthew Wilcox3749c512009-12-13 08:11:32 -0500442 unsigned char max_bus_speed; /* enum pci_bus_speed */
443 unsigned char cur_bus_speed; /* enum pci_bus_speed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
445 char name[48];
446
447 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200448 pci_bus_flags_t bus_flags; /* Inherited by child busses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 struct device *bridge;
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400450 struct device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
452 struct bin_attribute *legacy_mem; /* legacy mem */
Greg Kroah-Hartmancc74d962008-03-12 21:48:03 -0700453 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454};
455
456#define pci_bus_b(n) list_entry(n, struct pci_bus, node)
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400457#define to_pci_bus(n) container_of(n, struct pci_bus, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
Kenji Kaneshige79af72d2009-03-20 14:55:55 -0600459/*
460 * Returns true if the pci bus is root (behind host-pci bridge),
461 * false otherwise
462 */
463static inline bool pci_is_root_bus(struct pci_bus *pbus)
464{
465 return !(pbus->parent);
466}
467
Rafael J. Wysocki16cf0eb2009-01-05 14:50:27 +0100468#ifdef CONFIG_PCI_MSI
469static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
470{
471 return pci_dev->msi_enabled || pci_dev->msix_enabled;
472}
473#else
474static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
475#endif
476
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477/*
478 * Error values that may be returned by PCI functions.
479 */
480#define PCIBIOS_SUCCESSFUL 0x00
481#define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
482#define PCIBIOS_BAD_VENDOR_ID 0x83
483#define PCIBIOS_DEVICE_NOT_FOUND 0x86
484#define PCIBIOS_BAD_REGISTER_NUMBER 0x87
485#define PCIBIOS_SET_FAILED 0x88
486#define PCIBIOS_BUFFER_TOO_SMALL 0x89
487
Alex Williamsona6961652012-06-11 05:27:33 +0000488/*
489 * Translate above to generic errno for passing back through non-pci.
490 */
491static inline int pcibios_err_to_errno(int err)
492{
493 if (err <= PCIBIOS_SUCCESSFUL)
494 return err; /* Assume already errno */
495
496 switch (err) {
497 case PCIBIOS_FUNC_NOT_SUPPORTED:
498 return -ENOENT;
499 case PCIBIOS_BAD_VENDOR_ID:
500 return -EINVAL;
501 case PCIBIOS_DEVICE_NOT_FOUND:
502 return -ENODEV;
503 case PCIBIOS_BAD_REGISTER_NUMBER:
504 return -EFAULT;
505 case PCIBIOS_SET_FAILED:
506 return -EIO;
507 case PCIBIOS_BUFFER_TOO_SMALL:
508 return -ENOSPC;
509 }
510
511 return -ENOTTY;
512}
513
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514/* Low-level architecture-dependent routines */
515
516struct pci_ops {
517 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
518 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
519};
520
Matthew Wilcoxb6ce0682008-02-10 09:45:28 -0500521/*
522 * ACPI needs to be able to access PCI config space before we've done a
523 * PCI bus scan and created pci_bus structures.
524 */
525extern int raw_pci_read(unsigned int domain, unsigned int bus,
526 unsigned int devfn, int reg, int len, u32 *val);
527extern int raw_pci_write(unsigned int domain, unsigned int bus,
528 unsigned int devfn, int reg, int len, u32 val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530struct pci_bus_region {
Benjamin Herrenschmidtc40a22e2007-12-10 17:32:15 +1100531 resource_size_t start;
532 resource_size_t end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533};
534
535struct pci_dynids {
536 spinlock_t lock; /* protects list, index */
537 struct list_head list; /* for IDs added at runtime */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538};
539
linas392a1ce2005-11-16 17:10:41 -0600540/* ---------------------------------------------------------------- */
541/** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
Rolf Eike Beer579082d2007-07-10 13:35:05 +0200542 * a set of callbacks in struct pci_error_handlers, then that device driver
linas392a1ce2005-11-16 17:10:41 -0600543 * will be notified of PCI bus errors, and will be driven to recovery
544 * when an error occurs.
545 */
546
547typedef unsigned int __bitwise pci_ers_result_t;
548
549enum pci_ers_result {
550 /* no result/none/not supported in device driver */
551 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
552
553 /* Device driver can recover without slot reset */
554 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
555
556 /* Device driver wants slot to be reset. */
557 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
558
559 /* Device has completely failed, is unrecoverable */
560 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
561
562 /* Device driver is fully recovered and operational */
563 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
564};
565
566/* PCI bus error event callbacks */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800567struct pci_error_handlers {
linas392a1ce2005-11-16 17:10:41 -0600568 /* PCI bus error detected on this device */
569 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800570 enum pci_channel_state error);
linas392a1ce2005-11-16 17:10:41 -0600571
572 /* MMIO has been re-enabled, but not DMA */
573 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
574
575 /* PCI Express link has been reset */
576 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
577
578 /* PCI slot has been reset */
579 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
580
581 /* Device driver may resume normal operations */
582 void (*resume)(struct pci_dev *dev);
583};
584
585/* ---------------------------------------------------------------- */
586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587struct module;
588struct pci_driver {
589 struct list_head node;
Stephen Hemminger42b21932010-09-02 14:28:51 -0700590 const char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
592 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
593 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
594 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700595 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
596 int (*resume_early) (struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 int (*resume) (struct pci_dev *dev); /* Device woken up */
Greg KHc8958172005-04-08 14:53:31 +0900598 void (*shutdown) (struct pci_dev *dev);
linas392a1ce2005-11-16 17:10:41 -0600599 struct pci_error_handlers *err_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 struct device_driver driver;
601 struct pci_dynids dynids;
602};
603
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800604#define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605
606/**
Andrew Morton9f9351b2008-03-10 11:43:34 -0700607 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100608 * @_table: device table name
609 *
610 * This macro is used to create a struct pci_device_id array (a device table)
611 * in a generic manner.
612 */
Andrew Morton9f9351b2008-03-10 11:43:34 -0700613#define DEFINE_PCI_DEVICE_TABLE(_table) \
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100614 const struct pci_device_id _table[] __devinitconst
615
616/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 * PCI_DEVICE - macro used to describe a specific pci device
618 * @vend: the 16 bit PCI Vendor ID
619 * @dev: the 16 bit PCI Device ID
620 *
621 * This macro is used to create a struct pci_device_id that matches a
622 * specific device. The subvendor and subdevice fields will be set to
623 * PCI_ANY_ID.
624 */
625#define PCI_DEVICE(vend,dev) \
626 .vendor = (vend), .device = (dev), \
627 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
628
629/**
630 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
631 * @dev_class: the class, subclass, prog-if triple for this device
632 * @dev_class_mask: the class mask for this device
633 *
634 * This macro is used to create a struct pci_device_id that matches a
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700635 * specific PCI class. The vendor, device, subvendor, and subdevice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 * fields will be set to PCI_ANY_ID.
637 */
638#define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
639 .class = (dev_class), .class_mask = (dev_class_mask), \
640 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
641 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
642
Alan Cox1597cac2006-12-04 15:14:45 -0800643/**
644 * PCI_VDEVICE - macro used to describe a specific pci device in short form
Zhao, Yuc322b282008-10-13 19:36:05 +0800645 * @vendor: the vendor name
646 * @device: the 16 bit PCI Device ID
Alan Cox1597cac2006-12-04 15:14:45 -0800647 *
648 * This macro is used to create a struct pci_device_id that matches a
649 * specific PCI device. The subvendor, and subdevice fields will be set
650 * to PCI_ANY_ID. The macro allows the next field to follow as the device
651 * private data.
652 */
653
654#define PCI_VDEVICE(vendor, device) \
655 PCI_VENDOR_ID_##vendor, (device), \
656 PCI_ANY_ID, PCI_ANY_ID, 0, 0
657
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658/* these external functions are only available when PCI support is enabled */
659#ifdef CONFIG_PCI
660
Jon Masonb03e7492011-07-20 15:20:54 -0500661extern void pcie_bus_configure_settings(struct pci_bus *bus, u8 smpss);
662
663enum pcie_bus_config_types {
Jon Mason5f39e672011-10-03 09:50:20 -0500664 PCIE_BUS_TUNE_OFF,
Jon Masonb03e7492011-07-20 15:20:54 -0500665 PCIE_BUS_SAFE,
Jon Mason5f39e672011-10-03 09:50:20 -0500666 PCIE_BUS_PERFORMANCE,
Jon Masonb03e7492011-07-20 15:20:54 -0500667 PCIE_BUS_PEER2PEER,
668};
669
670extern enum pcie_bus_config_types pcie_bus_config;
671
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672extern struct bus_type pci_bus_type;
673
674/* Do NOT directly access these two variables, unless you are arch specific pci
675 * code, or pci core code. */
676extern struct list_head pci_root_buses; /* list of all known PCI buses */
Zhang, Yanmined4aaad2007-07-15 23:39:39 -0700677/* Some device drivers need know if pci is initiated */
678extern int no_pci_devices(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679
680void pcibios_fixup_bus(struct pci_bus *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700681int __must_check pcibios_enable_device(struct pci_dev *, int mask);
Myron Stowe2b6f2c32012-06-25 21:30:57 -0600682/* Architecture specific versions may override this (weak) */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800683char *pcibios_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
685/* Used only when drivers/pci/setup.c is used */
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100686resource_size_t pcibios_align_resource(void *, const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100687 resource_size_t,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700688 resource_size_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689void pcibios_update_irq(struct pci_dev *, int irq);
690
Benjamin Herrenschmidt2d1c8612009-12-09 17:52:13 +1100691/* Weak but can be overriden by arch */
692void pci_fixup_cardbus(struct pci_bus *);
693
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694/* Generic PCI functions used internally */
695
Bjorn Helgaas36a66cd2012-02-23 20:19:00 -0700696void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
697 struct resource *res);
698void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
699 struct pci_bus_region *region);
Mauro Carvalho Chehabd1fd4fb2009-07-10 18:39:53 -0300700void pcibios_scan_specific_bus(int busn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701extern struct pci_bus *pci_find_bus(int domain, int busnr);
akpm@linux-foundation.orgc48f1672009-02-03 15:45:26 -0800702void pci_bus_add_devices(const struct pci_bus *bus);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800703struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
704 struct pci_ops *ops, void *sysdata);
Bjorn Helgaasde4b2f72011-10-28 16:25:55 -0600705struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
Bjorn Helgaas166c6372011-10-28 16:25:45 -0600706struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
707 struct pci_ops *ops, void *sysdata,
708 struct list_head *resources);
Yinghai Lu98a35832012-05-18 11:35:50 -0600709int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
710int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
711void pci_bus_release_busn_res(struct pci_bus *b);
Bjorn Helgaasa2ebb822011-10-28 16:25:50 -0600712struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, int bus,
713 struct pci_ops *ops, void *sysdata,
714 struct list_head *resources);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800715struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
716 int busnr);
Matthew Wilcox3749c512009-12-13 08:11:32 -0500717void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
Alex Chiangf46753c2008-06-10 15:28:50 -0600718struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
Alex Chiang828f3762008-10-20 17:40:52 -0600719 const char *name,
720 struct hotplug_slot *hotplug);
Alex Chiangf46753c2008-06-10 15:28:50 -0600721void pci_destroy_slot(struct pci_slot *slot);
Alex Chiangd25b7c82008-10-20 17:40:47 -0600722void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723int pci_scan_slot(struct pci_bus *bus, int devfn);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800724struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
Paul Mackerrascdb9b9f2005-09-06 09:31:03 +1000725void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726unsigned int pci_scan_child_bus(struct pci_bus *bus);
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700727int __must_check pci_bus_add_device(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728void pci_read_bridge_bases(struct pci_bus *child);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800729struct resource *pci_find_parent_resource(const struct pci_dev *dev,
730 struct resource *res);
John Crispin3df425f2012-04-12 17:33:07 +0200731u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
Bjorn Helgaas68feac82008-12-16 21:36:55 -0700733u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
735extern void pci_dev_put(struct pci_dev *dev);
736extern void pci_remove_bus(struct pci_bus *b);
Yinghai Lu6b22cf32012-02-25 13:54:21 -0800737extern void __pci_remove_bus_device(struct pci_dev *dev);
Yinghai Lu210647a2012-02-25 13:54:20 -0800738extern void pci_stop_and_remove_bus_device(struct pci_dev *dev);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700739extern void pci_stop_bus_device(struct pci_dev *dev);
Dominik Brodowskib3743fa2005-09-09 13:03:23 -0700740void pci_setup_cardbus(struct pci_bus *bus);
Matt Domsch6b4b78f2006-09-29 15:23:23 -0500741extern void pci_sort_breadthfirst(void);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +0000742#define dev_is_pci(d) ((d)->bus == &pci_bus_type)
743#define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
744#define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
746/* Generic PCI functions exported to card drivers */
747
James Bottomley388c8c12008-08-03 13:02:12 -0500748enum pci_lost_interrupt_reason {
749 PCI_LOST_IRQ_NO_INFORMATION = 0,
750 PCI_LOST_IRQ_DISABLE_MSI,
751 PCI_LOST_IRQ_DISABLE_MSIX,
752 PCI_LOST_IRQ_DISABLE_ACPI,
753};
754enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800755int pci_find_capability(struct pci_dev *dev, int cap);
756int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
757int pci_find_ext_capability(struct pci_dev *dev, int cap);
758int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
759int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
Alan Cox29f3eb62006-10-16 16:20:21 -0700760struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
Andrew Mortond42552c2006-10-21 10:24:12 -0700762struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
763 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800764struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 unsigned int ss_vendor, unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -0700766 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800767struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
Andrew Patterson3c299dc2009-10-12 13:14:00 -0600768struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
769 unsigned int devfn);
770static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
771 unsigned int devfn)
772{
773 return pci_get_domain_bus_and_slot(0, bus, devfn);
774}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800775struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776int pci_dev_present(const struct pci_device_id *ids);
777
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800778int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
779 int where, u8 *val);
780int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
781 int where, u16 *val);
782int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
783 int where, u32 *val);
784int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
785 int where, u8 val);
786int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
787 int where, u16 val);
788int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
789 int where, u32 val);
Huang Yinga72b46c2009-04-24 10:45:17 +0800790struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
Al Virobf362f72012-03-19 00:01:09 +0000792static inline int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800794 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795}
Al Virobf362f72012-03-19 00:01:09 +0000796static inline int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800798 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799}
Al Virobf362f72012-03-19 00:01:09 +0000800static inline int pci_read_config_dword(const struct pci_dev *dev, int where,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800801 u32 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800803 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804}
Al Virobf362f72012-03-19 00:01:09 +0000805static inline int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800807 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808}
Al Virobf362f72012-03-19 00:01:09 +0000809static inline int pci_write_config_word(const struct pci_dev *dev, int where, u16 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800811 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812}
Al Virobf362f72012-03-19 00:01:09 +0000813static inline int pci_write_config_dword(const struct pci_dev *dev, int where,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800814 u32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800816 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817}
818
Alex Williamsonc63587d2012-06-11 05:27:19 +0000819/* user-space driven config access */
820int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
821int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
822int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
823int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
824int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
825int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
826
Andrew Morton4a7fb632006-08-14 22:43:17 -0700827int __must_check pci_enable_device(struct pci_dev *dev);
Benjamin Herrenschmidtb7189892007-12-20 15:28:08 +1100828int __must_check pci_enable_device_io(struct pci_dev *dev);
829int __must_check pci_enable_device_mem(struct pci_dev *dev);
Tejun Heo0b62e132007-07-27 14:43:35 +0900830int __must_check pci_reenable_device(struct pci_dev *);
Tejun Heo9ac78492007-01-20 16:00:26 +0900831int __must_check pcim_enable_device(struct pci_dev *pdev);
832void pcim_pin_device(struct pci_dev *pdev);
833
Yuji Shimada296ccb02009-04-03 16:41:46 +0900834static inline int pci_is_enabled(struct pci_dev *pdev)
835{
836 return (atomic_read(&pdev->enable_cnt) > 0);
837}
838
Tejun Heo9ac78492007-01-20 16:00:26 +0900839static inline int pci_is_managed(struct pci_dev *pdev)
840{
841 return pdev->is_managed;
842}
843
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844void pci_disable_device(struct pci_dev *dev);
Myron Stowe96c55902011-10-28 15:48:38 -0600845
846extern unsigned int pcibios_max_latency;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847void pci_set_master(struct pci_dev *dev);
Ben Hutchings6a479072008-12-23 03:08:29 +0000848void pci_clear_master(struct pci_dev *dev);
Myron Stowe96c55902011-10-28 15:48:38 -0600849
Brian Kingf7bdd122007-04-06 16:39:36 -0500850int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
Tejun Heo15ea76d2009-09-22 17:34:48 +0900851int pci_set_cacheline_size(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852#define HAVE_PCI_SET_MWI
Andrew Morton4a7fb632006-08-14 22:43:17 -0700853int __must_check pci_set_mwi(struct pci_dev *dev);
Randy Dunlap694625c2007-07-09 11:55:54 -0700854int pci_try_set_mwi(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855void pci_clear_mwi(struct pci_dev *dev);
Brett M Russa04ce0f2005-08-15 15:23:41 -0400856void pci_intx(struct pci_dev *dev, int enable);
Jan Kiszkaa2e27782011-11-04 09:46:00 +0100857bool pci_intx_mask_supported(struct pci_dev *dev);
858bool pci_check_and_mask_intx(struct pci_dev *dev);
859bool pci_check_and_unmask_intx(struct pci_dev *dev);
Eric W. Biedermanf5f2b132007-03-05 00:30:07 -0800860void pci_msi_off(struct pci_dev *dev);
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800861int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -0800862int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
Peter Orubad556ad42007-05-15 13:59:13 +0200863int pcix_get_max_mmrbc(struct pci_dev *dev);
864int pcix_get_mmrbc(struct pci_dev *dev);
865int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
Brice Goglin2637e5b2007-08-14 12:43:48 +0200866int pcie_get_readrq(struct pci_dev *dev);
Peter Orubad556ad42007-05-15 13:59:13 +0200867int pcie_set_readrq(struct pci_dev *dev, int rq);
Jon Masonb03e7492011-07-20 15:20:54 -0500868int pcie_get_mps(struct pci_dev *dev);
869int pcie_set_mps(struct pci_dev *dev, int mps);
Yu Zhao8c1c6992009-06-13 15:52:13 +0800870int __pci_reset_function(struct pci_dev *dev);
Konrad Rzeszutek Wilka96d6272012-01-04 14:23:56 -0500871int __pci_reset_function_locked(struct pci_dev *dev);
Sheng Yang8dd7f802008-10-21 17:38:25 +0800872int pci_reset_function(struct pci_dev *dev);
Yu Zhao14add802008-11-22 02:38:52 +0800873void pci_update_resource(struct pci_dev *dev, int resno);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700874int __must_check pci_assign_resource(struct pci_dev *dev, int i);
Ram Pai2bbc6942011-07-25 13:08:39 -0700875int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900876int pci_select_bars(struct pci_dev *dev, unsigned long flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877
878/* ROM control related routines */
Alan Coxe416de52008-09-23 17:25:10 +0100879int pci_enable_rom(struct pci_dev *pdev);
880void pci_disable_rom(struct pci_dev *pdev);
Dave Jones144a50e2005-08-09 00:20:10 -0400881void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
Timothy S. Nelson97c44832009-01-30 06:12:47 +1100883size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884
885/* Power management related routines */
886int pci_save_state(struct pci_dev *dev);
Jon Mason1d3c16a2010-11-30 17:43:26 -0600887void pci_restore_state(struct pci_dev *dev);
Alex Williamsonffbdd3f2011-05-10 10:02:27 -0600888struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
889int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state);
890int pci_load_and_free_saved_state(struct pci_dev *dev,
891 struct pci_saved_state **state);
Rafael J. Wysocki0e5dd462009-03-26 22:51:40 +0100892int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
Linus Torvalds9c8550e2005-09-09 15:43:46 -0700893int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
894pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200895bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
Rafael J. Wysocki5a6c9b62008-08-08 00:14:24 +0200896void pci_pme_active(struct pci_dev *dev, bool enable);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100897int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
898 bool runtime, bool enable);
Rafael J. Wysocki0235c4f2008-08-18 21:38:00 +0200899int pci_wake_from_d3(struct pci_dev *dev, bool enable);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200900pci_power_t pci_target_state(struct pci_dev *dev);
Rafael J. Wysocki404cc2d2008-07-07 03:35:26 +0200901int pci_prepare_to_sleep(struct pci_dev *dev);
902int pci_back_from_sleep(struct pci_dev *dev);
Rafael J. Wysockib67ea762010-02-17 23:44:09 +0100903bool pci_dev_run_wake(struct pci_dev *dev);
Matthew Garrettbf4d2902010-10-04 14:22:26 -0400904bool pci_check_pme_status(struct pci_dev *dev);
Matthew Garrettbf4d2902010-10-04 14:22:26 -0400905void pci_pme_wakeup_bus(struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100907static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
908 bool enable)
909{
910 return __pci_enable_wake(dev, state, false, enable);
911}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912
Jesse Barnesb48d4422010-10-19 13:07:57 -0700913#define PCI_EXP_IDO_REQUEST (1<<0)
914#define PCI_EXP_IDO_COMPLETION (1<<1)
915void pci_enable_ido(struct pci_dev *dev, unsigned long type);
916void pci_disable_ido(struct pci_dev *dev, unsigned long type);
917
Jesse Barnes48a92a82011-01-10 12:46:36 -0800918enum pci_obff_signal_type {
Myron Stowe688398b2011-07-07 15:00:36 -0600919 PCI_EXP_OBFF_SIGNAL_L0 = 0,
920 PCI_EXP_OBFF_SIGNAL_ALWAYS = 1,
Jesse Barnes48a92a82011-01-10 12:46:36 -0800921};
922int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type);
923void pci_disable_obff(struct pci_dev *dev);
924
Jesse Barnes51c2e0a2011-01-14 08:53:04 -0800925int pci_enable_ltr(struct pci_dev *dev);
926void pci_disable_ltr(struct pci_dev *dev);
927int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns);
928
Benjamin Herrenschmidtbb209c82010-01-26 17:10:03 +0000929/* For use by arch with custom probe code */
930void set_pcie_port_type(struct pci_dev *pdev);
931void set_pcie_hotplug_bridge(struct pci_dev *pdev);
932
Kumar Galace5ccde2007-07-16 23:27:10 -0500933/* Functions for PCI Hotplug drivers to use */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800934int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
Alex Chiang3ed4fd92009-03-20 14:56:25 -0600935#ifdef CONFIG_HOTPLUG
Yinghai Lu2f320522012-01-21 02:08:22 -0800936unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
Alex Chiang3ed4fd92009-03-20 14:56:25 -0600937unsigned int pci_rescan_bus(struct pci_bus *bus);
938#endif
Kumar Galace5ccde2007-07-16 23:27:10 -0500939
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800940/* Vital product data routines */
941ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
942ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
Stephen Hemmingerdb567942008-12-18 09:17:16 -0800943int pci_vpd_truncate(struct pci_dev *dev, size_t size);
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800944
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
Myron Stowe925845b2011-11-21 11:54:13 -0700946resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
Andrew Mortonea741552009-02-18 10:44:29 -0800947void pci_bus_assign_resources(const struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948void pci_bus_size_bridges(struct pci_bus *bus);
949int pci_claim_resource(struct pci_dev *, int);
950void pci_assign_unassigned_resources(void);
Yinghai Lu6841ec62010-01-22 01:02:25 -0800951void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952void pdev_enable_device(struct pci_dev *);
Bjorn Helgaas842de402008-03-04 11:56:47 -0700953int pci_enable_resources(struct pci_dev *, int mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
Ralf Baechled5341942011-06-10 15:30:21 +0100955 int (*)(const struct pci_dev *, u8, u8));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956#define HAVE_PCI_REQ_REGIONS 2
Andrew Morton4a7fb632006-08-14 22:43:17 -0700957int __must_check pci_request_regions(struct pci_dev *, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700958int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959void pci_release_regions(struct pci_dev *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700960int __must_check pci_request_region(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700961int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962void pci_release_region(struct pci_dev *, int);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900963int pci_request_selected_regions(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700964int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900965void pci_release_selected_regions(struct pci_dev *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966
967/* drivers/pci/bus.c */
Bjorn Helgaas45ca9e92011-10-28 16:25:35 -0600968void pci_add_resource(struct list_head *resources, struct resource *res);
Bjorn Helgaas0efd5aa2012-02-23 20:19:00 -0700969void pci_add_resource_offset(struct list_head *resources, struct resource *res,
970 resource_size_t offset);
Bjorn Helgaas45ca9e92011-10-28 16:25:35 -0600971void pci_free_resource_list(struct list_head *resources);
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700972void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
973struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
974void pci_bus_remove_resources(struct pci_bus *bus);
975
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700976#define pci_bus_for_each_resource(bus, res, i) \
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700977 for (i = 0; \
978 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
979 i++)
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700980
Andrew Morton4a7fb632006-08-14 22:43:17 -0700981int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
982 struct resource *res, resource_size_t size,
983 resource_size_t align, resource_size_t min,
984 unsigned int type_mask,
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100985 resource_size_t (*alignf)(void *,
986 const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100987 resource_size_t,
988 resource_size_t),
Andrew Morton4a7fb632006-08-14 22:43:17 -0700989 void *alignf_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990void pci_enable_bridges(struct pci_bus *bus);
991
Laurent riffard863b18f2005-10-27 23:12:54 +0200992/* Proper probing supporting hot-pluggable devices */
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -0800993int __must_check __pci_register_driver(struct pci_driver *, struct module *,
994 const char *mod_name);
Andrew Mortonbba81162008-07-30 12:07:04 -0700995
996/*
997 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
998 */
999#define pci_register_driver(driver) \
1000 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
Laurent riffard863b18f2005-10-27 23:12:54 +02001001
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001002void pci_unregister_driver(struct pci_driver *dev);
Greg Kroah-Hartmanaad4f402011-11-18 10:12:49 -08001003
1004/**
1005 * module_pci_driver() - Helper macro for registering a PCI driver
1006 * @__pci_driver: pci_driver struct
1007 *
1008 * Helper macro for PCI drivers which do not do anything special in module
1009 * init/exit. This eliminates a lot of boilerplate. Each module may only
1010 * use this macro once, and calling it replaces module_init() and module_exit()
1011 */
1012#define module_pci_driver(__pci_driver) \
1013 module_driver(__pci_driver, pci_register_driver, \
1014 pci_unregister_driver)
1015
Yinghai Lu6754b9e2012-02-25 13:54:22 -08001016void pci_stop_and_remove_behind_bridge(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001017struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
Tejun Heo9dba9102009-09-03 15:26:36 +09001018int pci_add_dynid(struct pci_driver *drv,
1019 unsigned int vendor, unsigned int device,
1020 unsigned int subvendor, unsigned int subdevice,
1021 unsigned int class, unsigned int class_mask,
1022 unsigned long driver_data);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001023const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1024 struct pci_dev *dev);
1025int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1026 int pass);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
Zhang, Yanmin70298c62009-06-16 13:34:38 +08001028void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
Paul Mackerrascecf4862005-08-18 14:33:01 +10001029 void *userdata);
Yinghai Lu70b9f7d2008-04-28 16:27:23 -07001030int pci_cfg_space_size_ext(struct pci_dev *dev);
Benjamin Herrenschmidtac7dc652005-12-13 18:09:16 +11001031int pci_cfg_space_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001032unsigned char pci_bus_max_busnr(struct pci_bus *bus);
Benjamin Herrenschmidte2444272011-09-11 14:08:38 -03001033void pci_setup_bridge(struct pci_bus *bus);
Paul Mackerrascecf4862005-08-18 14:33:01 +10001034
Dave Airlie3448a192010-06-01 15:32:24 +10001035#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1036#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1037
Benjamin Herrenschmidtdeb2d2e2009-08-11 15:52:06 +10001038int pci_set_vga_state(struct pci_dev *pdev, bool decode,
Dave Airlie3448a192010-06-01 15:32:24 +10001039 unsigned int command_bits, u32 flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040/* kmem_cache style wrapper around pci_alloc_consistent() */
1041
FUJITA Tomonorif41b1772010-03-10 15:23:30 -08001042#include <linux/pci-dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043#include <linux/dmapool.h>
1044
1045#define pci_pool dma_pool
1046#define pci_pool_create(name, pdev, size, align, allocation) \
1047 dma_pool_create(name, &pdev->dev, size, align, allocation)
1048#define pci_pool_destroy(pool) dma_pool_destroy(pool)
1049#define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1050#define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1051
David S. Millere24c2d92005-06-02 12:55:50 -07001052enum pci_dma_burst_strategy {
1053 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
1054 strategy_parameter is N/A */
1055 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
1056 byte boundaries */
1057 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
1058 strategy_parameter byte boundaries */
1059};
1060
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061struct msix_entry {
Yinghai Lu16dbef42008-08-15 19:36:45 -07001062 u32 vector; /* kernel uses to write allocated vector */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 u16 entry; /* driver uses to specify entry, OS writes */
1064};
1065
Eric W. Biederman0366f8f2006-10-04 02:16:33 -07001066
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067#ifndef CONFIG_PCI_MSI
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001068static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001069{
1070 return -1;
1071}
1072
Yinghai Lud52877c2008-04-23 14:58:09 -07001073static inline void pci_msi_shutdown(struct pci_dev *dev)
1074{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001075static inline void pci_disable_msi(struct pci_dev *dev)
1076{ }
1077
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +01001078static inline int pci_msix_table_size(struct pci_dev *dev)
1079{
1080 return 0;
1081}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001082static inline int pci_enable_msix(struct pci_dev *dev,
1083 struct msix_entry *entries, int nvec)
1084{
1085 return -1;
1086}
1087
Yinghai Lud52877c2008-04-23 14:58:09 -07001088static inline void pci_msix_shutdown(struct pci_dev *dev)
1089{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001090static inline void pci_disable_msix(struct pci_dev *dev)
1091{ }
1092
1093static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
1094{ }
1095
1096static inline void pci_restore_msi_state(struct pci_dev *dev)
1097{ }
Andrew Patterson07ae95f2008-11-10 15:31:05 -07001098static inline int pci_msi_enabled(void)
1099{
1100 return 0;
1101}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102#else
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001103extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -07001104extern void pci_msi_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105extern void pci_disable_msi(struct pci_dev *dev);
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +01001106extern int pci_msix_table_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001107extern int pci_enable_msix(struct pci_dev *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 struct msix_entry *entries, int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -07001109extern void pci_msix_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110extern void pci_disable_msix(struct pci_dev *dev);
1111extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
Linas Vepstas94688cf2007-11-07 15:43:59 -06001112extern void pci_restore_msi_state(struct pci_dev *dev);
Andrew Patterson07ae95f2008-11-10 15:31:05 -07001113extern int pci_msi_enabled(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114#endif
1115
Markus Trippelsdorfab0724f2011-01-15 00:07:22 +01001116#ifdef CONFIG_PCIEPORTBUS
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001117extern bool pcie_ports_disabled;
1118extern bool pcie_ports_auto;
Markus Trippelsdorfab0724f2011-01-15 00:07:22 +01001119#else
1120#define pcie_ports_disabled true
1121#define pcie_ports_auto false
1122#endif
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001123
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001124#ifndef CONFIG_PCIEASPM
Rafael J. Wysocki8b8bae92011-03-05 13:21:51 +01001125static inline int pcie_aspm_enabled(void) { return 0; }
1126static inline bool pcie_aspm_support_enabled(void) { return false; }
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001127#else
1128extern int pcie_aspm_enabled(void);
Rafael J. Wysocki8b8bae92011-03-05 13:21:51 +01001129extern bool pcie_aspm_support_enabled(void);
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001130#endif
1131
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001132#ifdef CONFIG_PCIEAER
1133void pci_no_aer(void);
1134bool pci_aer_available(void);
1135#else
1136static inline void pci_no_aer(void) { }
1137static inline bool pci_aer_available(void) { return false; }
1138#endif
1139
Andrew Patterson43c16402009-04-22 16:52:09 -06001140#ifndef CONFIG_PCIE_ECRC
1141static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
1142{
1143 return;
1144}
1145static inline void pcie_ecrc_get_policy(char *str) {};
1146#else
1147extern void pcie_set_ecrc_checking(struct pci_dev *dev);
1148extern void pcie_ecrc_get_policy(char *str);
1149#endif
1150
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001151#define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
1152
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001153#ifdef CONFIG_HT_IRQ
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001154/* The functions a driver should call */
1155int ht_create_irq(struct pci_dev *dev, int idx);
1156void ht_destroy_irq(unsigned int irq);
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001157#endif /* CONFIG_HT_IRQ */
1158
Jan Kiszkafb51ccb2011-11-04 09:45:59 +01001159extern void pci_cfg_access_lock(struct pci_dev *dev);
1160extern bool pci_cfg_access_trylock(struct pci_dev *dev);
1161extern void pci_cfg_access_unlock(struct pci_dev *dev);
Brian Kinge04b0ea2005-09-27 01:21:55 -07001162
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001163/*
1164 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1165 * a PCI domain is defined to be a set of PCI busses which share
1166 * configuration space.
1167 */
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001168#ifdef CONFIG_PCI_DOMAINS
1169extern int pci_domains_supported;
1170#else
1171enum { pci_domains_supported = 0 };
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001172static inline int pci_domain_nr(struct pci_bus *bus)
1173{
1174 return 0;
1175}
1176
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001177static inline int pci_proc_domain(struct pci_bus *bus)
1178{
1179 return 0;
1180}
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001181#endif /* CONFIG_PCI_DOMAINS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182
Mike Travis95a8b6e2010-02-02 14:38:13 -08001183/* some architectures require additional setup to direct VGA traffic */
1184typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
Dave Airlie3448a192010-06-01 15:32:24 +10001185 unsigned int command_bits, u32 flags);
Mike Travis95a8b6e2010-02-02 14:38:13 -08001186extern void pci_register_set_vga_state(arch_set_vga_state_t func);
1187
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001188#else /* CONFIG_PCI is not enabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189
1190/*
1191 * If the system does not have PCI, clearly these return errors. Define
1192 * these as simple inline functions to avoid hair in drivers.
1193 */
1194
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001195#define _PCI_NOP(o, s, t) \
1196 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1197 int where, t val) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001199
1200#define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1201 _PCI_NOP(o, word, u16 x) \
1202 _PCI_NOP(o, dword, u32 x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203_PCI_NOP_ALL(read, *)
1204_PCI_NOP_ALL(write,)
1205
Andrew Mortond42552c2006-10-21 10:24:12 -07001206static inline struct pci_dev *pci_get_device(unsigned int vendor,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001207 unsigned int device,
1208 struct pci_dev *from)
1209{
1210 return NULL;
1211}
Andrew Mortond42552c2006-10-21 10:24:12 -07001212
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001213static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1214 unsigned int device,
1215 unsigned int ss_vendor,
1216 unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -07001217 struct pci_dev *from)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001218{
1219 return NULL;
1220}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001222static inline struct pci_dev *pci_get_class(unsigned int class,
1223 struct pci_dev *from)
1224{
1225 return NULL;
1226}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
1228#define pci_dev_present(ids) (0)
Zhang, Yanmined4aaad2007-07-15 23:39:39 -07001229#define no_pci_devices() (1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230#define pci_dev_put(dev) do { } while (0)
1231
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001232static inline void pci_set_master(struct pci_dev *dev)
1233{ }
1234
1235static inline int pci_enable_device(struct pci_dev *dev)
1236{
1237 return -EIO;
1238}
1239
1240static inline void pci_disable_device(struct pci_dev *dev)
1241{ }
1242
1243static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1244{
1245 return -EIO;
1246}
1247
Randy Dunlap80be0382008-06-30 11:35:53 -07001248static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1249{
1250 return -EIO;
1251}
1252
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -08001253static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1254 unsigned int size)
1255{
1256 return -EIO;
1257}
1258
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -08001259static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1260 unsigned long mask)
1261{
1262 return -EIO;
1263}
1264
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001265static inline int pci_assign_resource(struct pci_dev *dev, int i)
1266{
1267 return -EBUSY;
1268}
1269
1270static inline int __pci_register_driver(struct pci_driver *drv,
1271 struct module *owner)
1272{
1273 return 0;
1274}
1275
1276static inline int pci_register_driver(struct pci_driver *drv)
1277{
1278 return 0;
1279}
1280
1281static inline void pci_unregister_driver(struct pci_driver *drv)
1282{ }
1283
1284static inline int pci_find_capability(struct pci_dev *dev, int cap)
1285{
1286 return 0;
1287}
1288
1289static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1290 int cap)
1291{
1292 return 0;
1293}
1294
1295static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1296{
1297 return 0;
1298}
1299
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300/* Power management related routines */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001301static inline int pci_save_state(struct pci_dev *dev)
1302{
1303 return 0;
1304}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305
Jon Mason1d3c16a2010-11-30 17:43:26 -06001306static inline void pci_restore_state(struct pci_dev *dev)
1307{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001308
1309static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1310{
1311 return 0;
1312}
1313
Randy Dunlap34492482011-02-14 12:27:50 -08001314static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1315{
1316 return 0;
1317}
1318
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001319static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1320 pm_message_t state)
1321{
1322 return PCI_D0;
1323}
1324
1325static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1326 int enable)
1327{
1328 return 0;
1329}
1330
Jesse Barnesb48d4422010-10-19 13:07:57 -07001331static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type)
1332{
1333}
1334
1335static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type)
1336{
1337}
1338
Jesse Barnes48a92a82011-01-10 12:46:36 -08001339static inline int pci_enable_obff(struct pci_dev *dev, unsigned long type)
1340{
1341 return 0;
1342}
1343
1344static inline void pci_disable_obff(struct pci_dev *dev)
1345{
1346}
1347
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001348static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1349{
1350 return -EIO;
1351}
1352
1353static inline void pci_release_regions(struct pci_dev *dev)
1354{ }
Sergei Shtylyov0da0ead2007-04-01 21:13:58 +04001355
Kumar Galaa46e8122005-07-29 12:16:27 -07001356#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1357
Jan Kiszkafb51ccb2011-11-04 09:45:59 +01001358static inline void pci_block_cfg_access(struct pci_dev *dev)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001359{ }
1360
Jan Kiszkafb51ccb2011-11-04 09:45:59 +01001361static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1362{ return 0; }
1363
1364static inline void pci_unblock_cfg_access(struct pci_dev *dev)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001365{ }
Brian Kinge04b0ea2005-09-27 01:21:55 -07001366
Randy Dunlapd80d0212007-07-01 12:06:37 -07001367static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1368{ return NULL; }
1369
1370static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1371 unsigned int devfn)
1372{ return NULL; }
1373
1374static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1375 unsigned int devfn)
1376{ return NULL; }
1377
Dave Airlie92298e62010-08-13 10:22:17 +10001378static inline int pci_domain_nr(struct pci_bus *bus)
1379{ return 0; }
1380
Alex Williamson12ea6ca2012-06-11 05:26:55 +00001381static inline struct pci_dev *pci_dev_get(struct pci_dev *dev)
1382{ return NULL; }
1383
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001384#define dev_is_pci(d) (false)
1385#define dev_is_pf(d) (false)
1386#define dev_num_vf(d) (0)
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001387#endif /* CONFIG_PCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001389/* Include architecture-dependent settings and functions */
1390
1391#include <asm/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392
Yinghai Lu1f82de12009-04-23 20:48:32 -07001393#ifndef PCIBIOS_MAX_MEM_32
1394#define PCIBIOS_MAX_MEM_32 (-1)
1395#endif
1396
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397/* these helpers provide future and backwards compatibility
1398 * for accessing popular PCI BAR info */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001399#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1400#define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1401#define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402#define pci_resource_len(dev,bar) \
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001403 ((pci_resource_start((dev), (bar)) == 0 && \
1404 pci_resource_end((dev), (bar)) == \
1405 pci_resource_start((dev), (bar))) ? 0 : \
1406 \
1407 (pci_resource_end((dev), (bar)) - \
1408 pci_resource_start((dev), (bar)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409
1410/* Similar to the helpers above, these manipulate per-pci_dev
1411 * driver-specific data. They are really just a wrapper around
1412 * the generic device structure functions of these calls.
1413 */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001414static inline void *pci_get_drvdata(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415{
1416 return dev_get_drvdata(&pdev->dev);
1417}
1418
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001419static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420{
1421 dev_set_drvdata(&pdev->dev, data);
1422}
1423
1424/* If you want to know what to call your pci_dev, ask this function.
1425 * Again, it's a wrapper around the generic device.
1426 */
Alexey Zaytsev2fc90f62009-06-24 16:22:30 +04001427static inline const char *pci_name(const struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428{
Greg KHc6c4f072008-07-03 09:49:39 -07001429 return dev_name(&pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430}
1431
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001432
1433/* Some archs don't want to expose struct resource to userland as-is
1434 * in sysfs and /proc
1435 */
1436#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1437static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001438 const struct resource *rsrc, resource_size_t *start,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -07001439 resource_size_t *end)
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001440{
1441 *start = rsrc->start;
1442 *end = rsrc->end;
1443}
1444#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1445
1446
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447/*
1448 * The world is not perfect and supplies us with broken PCI devices.
1449 * For at least a part of these bugs we need a work-around, so both
1450 * generic (drivers/pci/quirks.c) and per-architecture code can define
1451 * fixup hooks to be called for particular buggy devices.
1452 */
1453
1454struct pci_fixup {
Yinghai Luf4ca5c62012-02-23 23:46:49 -08001455 u16 vendor; /* You can use PCI_ANY_ID here of course */
1456 u16 device; /* You can use PCI_ANY_ID here of course */
1457 u32 class; /* You can use PCI_ANY_ID here too */
1458 unsigned int class_shift; /* should be 0, 8, 16 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 void (*hook)(struct pci_dev *dev);
1460};
1461
1462enum pci_fixup_pass {
1463 pci_fixup_early, /* Before probing BARs */
1464 pci_fixup_header, /* After reading configuration header */
1465 pci_fixup_final, /* Final phase of device fixups */
1466 pci_fixup_enable, /* pci_enable_device() time */
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001467 pci_fixup_resume, /* pci_device_resume() */
1468 pci_fixup_suspend, /* pci_device_suspend */
1469 pci_fixup_resume_early, /* pci_device_resume_early() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470};
1471
1472/* Anonymous variables would be nice... */
Yinghai Luf4ca5c62012-02-23 23:46:49 -08001473#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1474 class_shift, hook) \
1475 static const struct pci_fixup const __pci_fixup_##name __used \
1476 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1477 = { vendor, device, class, class_shift, hook };
1478
1479#define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1480 class_shift, hook) \
1481 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1482 vendor##device##hook, vendor, device, class, class_shift, hook)
1483#define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1484 class_shift, hook) \
1485 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1486 vendor##device##hook, vendor, device, class, class_shift, hook)
1487#define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1488 class_shift, hook) \
1489 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1490 vendor##device##hook, vendor, device, class, class_shift, hook)
1491#define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1492 class_shift, hook) \
1493 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1494 vendor##device##hook, vendor, device, class, class_shift, hook)
1495#define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1496 class_shift, hook) \
1497 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1498 resume##vendor##device##hook, vendor, device, class, \
1499 class_shift, hook)
1500#define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1501 class_shift, hook) \
1502 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1503 resume_early##vendor##device##hook, vendor, device, \
1504 class, class_shift, hook)
1505#define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1506 class_shift, hook) \
1507 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1508 suspend##vendor##device##hook, vendor, device, class, \
1509 class_shift, hook)
1510
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1512 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
Yinghai Luf4ca5c62012-02-23 23:46:49 -08001513 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1515 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
Yinghai Luf4ca5c62012-02-23 23:46:49 -08001516 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1518 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
Yinghai Luf4ca5c62012-02-23 23:46:49 -08001519 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1521 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
Yinghai Luf4ca5c62012-02-23 23:46:49 -08001522 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
Alan Cox1597cac2006-12-04 15:14:45 -08001523#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1524 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
Yinghai Luf4ca5c62012-02-23 23:46:49 -08001525 resume##vendor##device##hook, vendor, device, \
1526 PCI_ANY_ID, 0, hook)
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001527#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1528 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
Yinghai Luf4ca5c62012-02-23 23:46:49 -08001529 resume_early##vendor##device##hook, vendor, device, \
1530 PCI_ANY_ID, 0, hook)
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001531#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1532 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
Yinghai Luf4ca5c62012-02-23 23:46:49 -08001533 suspend##vendor##device##hook, vendor, device, \
1534 PCI_ANY_ID, 0, hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001536#ifdef CONFIG_PCI_QUIRKS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
Alex Williamson12ea6ca2012-06-11 05:26:55 +00001538struct pci_dev *pci_get_dma_source(struct pci_dev *dev);
Alex Williamsonad805752012-06-11 05:27:07 +00001539int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001540#else
1541static inline void pci_fixup_device(enum pci_fixup_pass pass,
1542 struct pci_dev *dev) {}
Alex Williamson12ea6ca2012-06-11 05:26:55 +00001543static inline struct pci_dev *pci_get_dma_source(struct pci_dev *dev)
1544{
1545 return pci_dev_get(dev);
1546}
Alex Williamsonad805752012-06-11 05:27:07 +00001547static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
1548 u16 acs_flags)
1549{
1550 return -ENOTTY;
1551}
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001552#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001554void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
Al Viro5ea81762007-02-11 15:41:31 +00001555void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001556void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
Yinghai Lufb7ebfe2012-01-04 15:50:02 -08001557int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
1558int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
Tejun Heo916fbfb2008-03-12 15:26:34 +09001559 const char *name);
Yinghai Lufb7ebfe2012-01-04 15:50:02 -08001560void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
Al Viro5ea81762007-02-11 15:41:31 +00001561
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562extern int pci_pci_problems;
Alan Cox236561e2006-09-30 23:27:03 -07001563#define PCIPCI_FAIL 1 /* No PCI PCI DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564#define PCIPCI_TRITON 2
1565#define PCIPCI_NATOMA 4
1566#define PCIPCI_VIAETBF 8
1567#define PCIPCI_VSFX 16
Alan Cox236561e2006-09-30 23:27:03 -07001568#define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1569#define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001571extern unsigned long pci_cardbus_io_size;
1572extern unsigned long pci_cardbus_mem_size;
David Howells491424c2009-12-14 14:13:44 +00001573extern u8 __devinitdata pci_dfl_cache_line_size;
Jesse Barnesac1aa472009-10-26 13:20:44 -07001574extern u8 pci_cache_line_size;
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001575
Eric W. Biederman28760482009-09-09 14:09:24 -07001576extern unsigned long pci_hotplug_io_size;
1577extern unsigned long pci_hotplug_mem_size;
1578
Myron Stowecfce9fb2011-10-28 15:47:35 -06001579/* Architecture specific versions may override these (weak) */
Adrian Bunk19792a02008-05-05 21:25:47 +03001580int pcibios_add_platform_entries(struct pci_dev *dev);
1581void pcibios_disable_device(struct pci_dev *dev);
Myron Stowecfce9fb2011-10-28 15:47:35 -06001582void pcibios_set_master(struct pci_dev *dev);
Adrian Bunk19792a02008-05-05 21:25:47 +03001583int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1584 enum pcie_reset_state state);
Michael Ellerman575e3342007-05-08 12:03:07 +10001585
Robert Hancock7752d5c2008-02-15 01:27:20 -08001586#ifdef CONFIG_PCI_MMCONFIG
Yinghai Lubb63b422008-02-28 23:56:50 -08001587extern void __init pci_mmcfg_early_init(void);
Robert Hancock7752d5c2008-02-15 01:27:20 -08001588extern void __init pci_mmcfg_late_init(void);
1589#else
Yinghai Lubb63b422008-02-28 23:56:50 -08001590static inline void pci_mmcfg_early_init(void) { }
Robert Hancock7752d5c2008-02-15 01:27:20 -08001591static inline void pci_mmcfg_late_init(void) { }
1592#endif
1593
Andrew Patterson0ef5f8f2008-11-10 15:30:50 -07001594int pci_ext_cfg_avail(struct pci_dev *dev);
1595
Andrew Morton1684f5d2008-12-01 14:30:30 -08001596void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
Arjan van de Venaa42d7c2008-09-28 16:36:11 -07001597
Yu Zhaodd7cc442009-03-20 11:25:15 +08001598#ifdef CONFIG_PCI_IOV
1599extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1600extern void pci_disable_sriov(struct pci_dev *dev);
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001601extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001602extern int pci_num_vf(struct pci_dev *dev);
Yu Zhaodd7cc442009-03-20 11:25:15 +08001603#else
1604static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1605{
1606 return -ENODEV;
1607}
1608static inline void pci_disable_sriov(struct pci_dev *dev)
1609{
1610}
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001611static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
1612{
1613 return IRQ_NONE;
1614}
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001615static inline int pci_num_vf(struct pci_dev *dev)
1616{
1617 return 0;
1618}
Yu Zhaodd7cc442009-03-20 11:25:15 +08001619#endif
1620
Kenji Kaneshigec825bc92009-06-16 11:01:25 +09001621#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1622extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
1623extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1624#endif
1625
Kenji Kaneshiged7b7e602009-11-11 14:29:54 +09001626/**
1627 * pci_pcie_cap - get the saved PCIe capability offset
1628 * @dev: PCI device
1629 *
1630 * PCIe capability offset is calculated at PCI device initialization
1631 * time and saved in the data structure. This function returns saved
1632 * PCIe capability offset. Using this instead of pci_find_capability()
1633 * reduces unnecessary search in the PCI configuration space. If you
1634 * need to calculate PCIe capability offset from raw device for some
1635 * reasons, please use pci_find_capability() instead.
1636 */
1637static inline int pci_pcie_cap(struct pci_dev *dev)
1638{
1639 return dev->pcie_cap;
1640}
1641
Kenji Kaneshige7eb776c2009-11-11 14:35:22 +09001642/**
1643 * pci_is_pcie - check if the PCI device is PCI Express capable
1644 * @dev: PCI device
1645 *
1646 * Retrun true if the PCI device is PCI Express capable, false otherwise.
1647 */
1648static inline bool pci_is_pcie(struct pci_dev *dev)
1649{
1650 return !!pci_pcie_cap(dev);
1651}
1652
Chris Wright5d990b62009-12-04 12:15:21 -08001653void pci_request_acs(void);
Alex Williamsonad805752012-06-11 05:27:07 +00001654bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
1655bool pci_acs_path_enabled(struct pci_dev *start,
1656 struct pci_dev *end, u16 acs_flags);
Matt Carlsona2ce7662010-02-26 14:04:39 +00001657
Matt Carlson7ad506f2010-02-26 14:04:40 +00001658#define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1659#define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT)
1660
1661/* Large Resource Data Type Tag Item Names */
1662#define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1663#define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1664#define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1665
1666#define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1667#define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1668#define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1669
1670/* Small Resource Data Type Tag Item Names */
1671#define PCI_VPD_STIN_END 0x78 /* End */
1672
1673#define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1674
1675#define PCI_VPD_SRDT_TIN_MASK 0x78
1676#define PCI_VPD_SRDT_LEN_MASK 0x07
1677
1678#define PCI_VPD_LRDT_TAG_SIZE 3
1679#define PCI_VPD_SRDT_TAG_SIZE 1
Matt Carlsona2ce7662010-02-26 14:04:39 +00001680
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001681#define PCI_VPD_INFO_FLD_HDR_SIZE 3
1682
Matt Carlson4067a852010-02-26 14:04:43 +00001683#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1684#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1685#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
Matt Carlsond4894f32011-03-09 16:58:21 +00001686#define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
Matt Carlson4067a852010-02-26 14:04:43 +00001687
Matt Carlsona2ce7662010-02-26 14:04:39 +00001688/**
1689 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1690 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1691 *
1692 * Returns the extracted Large Resource Data Type length.
1693 */
1694static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1695{
1696 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1697}
1698
Matt Carlson7ad506f2010-02-26 14:04:40 +00001699/**
1700 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1701 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1702 *
1703 * Returns the extracted Small Resource Data Type length.
1704 */
1705static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1706{
1707 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1708}
1709
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001710/**
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001711 * pci_vpd_info_field_size - Extracts the information field length
1712 * @lrdt: Pointer to the beginning of an information field header
1713 *
1714 * Returns the extracted information field length.
1715 */
1716static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1717{
1718 return info_field[2];
1719}
1720
1721/**
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001722 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1723 * @buf: Pointer to buffered vpd data
1724 * @off: The offset into the buffer at which to begin the search
1725 * @len: The length of the vpd buffer
1726 * @rdt: The Resource Data Type to search for
1727 *
1728 * Returns the index where the Resource Data Type was found or
1729 * -ENOENT otherwise.
1730 */
1731int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1732
Matt Carlson4067a852010-02-26 14:04:43 +00001733/**
1734 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1735 * @buf: Pointer to buffered vpd data
1736 * @off: The offset into the buffer at which to begin the search
1737 * @len: The length of the buffer area, relative to off, in which to search
1738 * @kw: The keyword to search for
1739 *
1740 * Returns the index where the information field keyword was found or
1741 * -ENOENT otherwise.
1742 */
1743int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1744 unsigned int len, const char *kw);
1745
Benjamin Herrenschmidt98d9f30c82011-04-11 11:37:07 +10001746/* PCI <-> OF binding helpers */
1747#ifdef CONFIG_OF
1748struct device_node;
1749extern void pci_set_of_node(struct pci_dev *dev);
1750extern void pci_release_of_node(struct pci_dev *dev);
1751extern void pci_set_bus_of_node(struct pci_bus *bus);
1752extern void pci_release_bus_of_node(struct pci_bus *bus);
1753
1754/* Arch may override this (weak) */
1755extern struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus);
1756
John Crispin3df425f2012-04-12 17:33:07 +02001757static inline struct device_node *
1758pci_device_to_OF_node(const struct pci_dev *pdev)
Benjamin Herrenschmidt64099d92011-04-07 13:09:47 +10001759{
1760 return pdev ? pdev->dev.of_node : NULL;
1761}
1762
Benjamin Herrenschmidtef3b4f82011-04-11 11:34:33 +10001763static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
1764{
1765 return bus ? bus->dev.of_node : NULL;
1766}
1767
Benjamin Herrenschmidt98d9f30c82011-04-11 11:37:07 +10001768#else /* CONFIG_OF */
1769static inline void pci_set_of_node(struct pci_dev *dev) { }
1770static inline void pci_release_of_node(struct pci_dev *dev) { }
1771static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
1772static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
1773#endif /* CONFIG_OF */
1774
Gavin Shaneb740b52012-02-27 20:04:04 +00001775#ifdef CONFIG_EEH
1776static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
1777{
1778 return pdev->dev.archdata.edev;
1779}
1780#endif
1781
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +03001782/**
1783 * pci_find_upstream_pcie_bridge - find upstream PCIe-to-PCI bridge of a device
1784 * @pdev: the PCI device
1785 *
1786 * if the device is PCIE, return NULL
1787 * if the device isn't connected to a PCIe bridge (that is its parent is a
1788 * legacy PCI bridge and the bridge is directly connected to bus 0), return its
1789 * parent
1790 */
1791struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
1792
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793#endif /* __KERNEL__ */
1794#endif /* LINUX_PCI_H */