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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
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100135#define PCI_PM_D2_DELAY 200
136#define PCI_PM_D3_WAIT 10
137#define PCI_PM_BUS_WAIT 50
138
linas392a1ce2005-11-16 17:10:41 -0600139/** The pci_channel state describes connectivity between the CPU and
140 * the pci device. If some PCI bus between here and the pci device
141 * has crashed or locked up, this info is reflected here.
142 */
143typedef unsigned int __bitwise pci_channel_state_t;
144
145enum pci_channel_state {
146 /* I/O channel is in normal state */
147 pci_channel_io_normal = (__force pci_channel_state_t) 1,
148
149 /* I/O to channel is blocked */
150 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
151
152 /* PCI card is dead */
153 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
154};
155
Brian Kingf7bdd122007-04-06 16:39:36 -0500156typedef unsigned int __bitwise pcie_reset_state_t;
157
158enum pcie_reset_state {
159 /* Reset is NOT asserted (Use to deassert reset) */
160 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
161
162 /* Use #PERST to reset PCI-E device */
163 pcie_warm_reset = (__force pcie_reset_state_t) 2,
164
165 /* Use PCI-E Hot Reset to reset device */
166 pcie_hot_reset = (__force pcie_reset_state_t) 3
167};
168
David Millerba698ad2007-10-25 01:16:30 -0700169typedef unsigned short __bitwise pci_dev_flags_t;
170enum pci_dev_flags {
171 /* INTX_DISABLE in PCI_COMMAND register disables MSI
172 * generation too.
173 */
174 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
Alan Cox979b1792008-07-24 17:18:38 +0100175 /* Device configuration is irrevocably lost if disabled into D3 */
176 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
Greg Rose67778292011-07-22 05:46:07 +0000177 /* Provide indication device is assigned by a Virtual Machine Manager */
178 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) 4,
David Millerba698ad2007-10-25 01:16:30 -0700179};
180
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200181enum pci_irq_reroute_variant {
182 INTEL_IRQ_REROUTE_VARIANT = 1,
183 MAX_IRQ_REROUTE_VARIANTS = 3
184};
185
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200186typedef unsigned short __bitwise pci_bus_flags_t;
187enum pci_bus_flags {
Peter Orubad556ad42007-05-15 13:59:13 +0200188 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
189 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200190};
191
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500192/* Based on the PCI Hotplug Spec, but some values are made up by us */
193enum pci_bus_speed {
194 PCI_SPEED_33MHz = 0x00,
195 PCI_SPEED_66MHz = 0x01,
196 PCI_SPEED_66MHz_PCIX = 0x02,
197 PCI_SPEED_100MHz_PCIX = 0x03,
198 PCI_SPEED_133MHz_PCIX = 0x04,
199 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
200 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
201 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
202 PCI_SPEED_66MHz_PCIX_266 = 0x09,
203 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
204 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
Matthew Wilcox45b4cdd52009-12-13 08:11:34 -0500205 AGP_UNKNOWN = 0x0c,
206 AGP_1X = 0x0d,
207 AGP_2X = 0x0e,
208 AGP_4X = 0x0f,
209 AGP_8X = 0x10,
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500210 PCI_SPEED_66MHz_PCIX_533 = 0x11,
211 PCI_SPEED_100MHz_PCIX_533 = 0x12,
212 PCI_SPEED_133MHz_PCIX_533 = 0x13,
213 PCIE_SPEED_2_5GT = 0x14,
214 PCIE_SPEED_5_0GT = 0x15,
Matthew Wilcox9dfd97f2009-12-13 08:11:35 -0500215 PCIE_SPEED_8_0GT = 0x16,
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500216 PCI_SPEED_UNKNOWN = 0xff,
217};
218
Alex Williamson24a4742f2011-05-10 10:02:11 -0600219struct pci_cap_saved_data {
220 char cap_nr;
221 unsigned int size;
222 u32 data[0];
223};
224
Shaohua Li41017f02006-02-08 17:11:38 +0800225struct pci_cap_saved_state {
226 struct hlist_node next;
Alex Williamson24a4742f2011-05-10 10:02:11 -0600227 struct pci_cap_saved_data cap;
Shaohua Li41017f02006-02-08 17:11:38 +0800228};
229
Shaohua Li7d715a62008-02-25 09:46:41 +0800230struct pcie_link_state;
Jesse Barnesee69439c2008-04-28 12:30:35 -0700231struct pci_vpd;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800232struct pci_sriov;
Yu Zhao302b4212009-05-18 13:51:32 +0800233struct pci_ats;
Jesse Barnesee69439c2008-04-28 12:30:35 -0700234
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235/*
236 * The pci_dev structure is used to describe PCI devices.
237 */
238struct pci_dev {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 struct list_head bus_list; /* node in per-bus list */
240 struct pci_bus *bus; /* bus this device is on */
241 struct pci_bus *subordinate; /* bus this device bridges to */
242
243 void *sysdata; /* hook for sys-specific extension */
244 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
Alex Chiangf46753c2008-06-10 15:28:50 -0600245 struct pci_slot *slot; /* Physical slot this device is in */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247 unsigned int devfn; /* encoded device & function index */
248 unsigned short vendor;
249 unsigned short device;
250 unsigned short subsystem_vendor;
251 unsigned short subsystem_device;
252 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
Auke Kokb8a3a522007-06-08 15:46:30 -0700253 u8 revision; /* PCI revision, low byte of class word */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
Kenji Kaneshige0efea002009-11-05 12:05:11 +0900255 u8 pcie_cap; /* PCI-E capability offset */
Jon Masonb03e7492011-07-20 15:20:54 -0500256 u8 pcie_type:4; /* PCI-E device/port type */
257 u8 pcie_mpss:3; /* PCI-E Max Payload Size Supported */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 u8 rom_base_reg; /* which config register controls the ROM */
Kristen Accardiffeff782005-11-02 16:24:32 -0800259 u8 pin; /* which interrupt pin this device uses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261 struct pci_driver *driver; /* which driver has allocated this device */
262 u64 dma_mask; /* Mask of the bits of bus address this
263 device implements. Normally this is
264 0xffffffff. You only need to change
265 this if your device has broken DMA
266 or supports 64-bit transfers. */
267
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800268 struct device_dma_parameters dma_parms;
269
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 pci_power_t current_state; /* Current operating state. In ACPI-speak,
271 this is D0-D3, D0 being fully functional,
272 and D3 being off. */
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200273 int pm_cap; /* PM capability offset in the
274 configuration space */
275 unsigned int pme_support:5; /* Bitmask of states from which PME#
276 can be generated */
Rafael J. Wysockic7f48652010-02-17 23:39:08 +0100277 unsigned int pme_interrupt:1;
Rafael J. Wysocki379021d2011-10-03 23:16:33 +0200278 unsigned int pme_poll:1; /* Poll device's PME status bit */
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200279 unsigned int d1_support:1; /* Low power state D1 is supported */
280 unsigned int d2_support:1; /* Low power state D2 is supported */
281 unsigned int no_d1d2:1; /* Only allow D0 and D3 */
Jacob Pan253d2e52010-07-16 10:19:22 -0700282 unsigned int mmio_always_on:1; /* disallow turning off io/mem
283 decoding during bar sizing */
Rafael J. Wysockie80bb092009-09-08 23:14:49 +0200284 unsigned int wakeup_prepared:1;
Rafael J. Wysocki1ae861e2009-12-31 12:15:54 +0100285 unsigned int d3_delay; /* D3->D0 transition time in ms */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Shaohua Li7d715a62008-02-25 09:46:41 +0800287#ifdef CONFIG_PCIEASPM
288 struct pcie_link_state *link_state; /* ASPM link state. */
289#endif
290
linas392a1ce2005-11-16 17:10:41 -0600291 pci_channel_state_t error_state; /* current connectivity state */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 struct device dev; /* Generic device interface */
293
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 int cfg_size; /* Size of configuration space */
295
296 /*
297 * Instead of touching interrupt line and base address registers
298 * directly, use the values stored here. They might be different!
299 */
300 unsigned int irq;
301 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
Bjorn Helgaas58c84ed2010-07-15 09:41:42 -0600302 resource_size_t fw_addr[DEVICE_COUNT_RESOURCE]; /* FW-assigned addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304 /* These fields are used by common fixups */
305 unsigned int transparent:1; /* Transparent PCI bridge */
306 unsigned int multifunction:1;/* Part of multi-function device */
307 /* keep track of device state */
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -0800308 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 unsigned int is_busmaster:1; /* device is busmaster */
Kristen Accardi4602b882005-08-16 15:15:58 -0700310 unsigned int no_msi:1; /* device may not use msi */
Jan Kiszkafb51ccb2011-11-04 09:45:59 +0100311 unsigned int block_cfg_access:1; /* config space access is blocked */
Doug Thompsonbd8481e2006-05-08 17:06:09 -0700312 unsigned int broken_parity_status:1; /* Device generates false positive parity */
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200313 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
Shaohua Li99dc8042006-05-26 10:58:27 +0800314 unsigned int msi_enabled:1;
315 unsigned int msix_enabled:1;
Yu Zhao58c3a722008-10-14 14:02:53 +0800316 unsigned int ari_enabled:1; /* ARI forwarding */
Tejun Heo9ac78492007-01-20 16:00:26 +0900317 unsigned int is_managed:1;
Kenji Kaneshige6d3be842010-02-09 12:21:27 +0900318 unsigned int is_pcie:1; /* Obsolete. Will be removed.
319 Use pci_is_pcie() instead */
Mike Mason260d7032009-07-30 15:33:21 -0700320 unsigned int needs_freset:1; /* Dev requires fundamental reset */
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100321 unsigned int state_saved:1;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800322 unsigned int is_physfn:1;
Yu Zhaodd7cc442009-03-20 11:25:15 +0800323 unsigned int is_virtfn:1;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +0300324 unsigned int reset_fn:1;
Eric W. Biederman28760482009-09-09 14:09:24 -0700325 unsigned int is_hotplug_bridge:1;
Huang Yingaffb72c2010-05-18 14:35:16 +0800326 unsigned int __aer_firmware_first_valid:1;
327 unsigned int __aer_firmware_first:1;
David Millerba698ad2007-10-25 01:16:30 -0700328 pci_dev_flags_t dev_flags;
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800329 atomic_t enable_cnt; /* pci_enable_device has been called */
Kristen Accardi4602b882005-08-16 15:15:58 -0700330
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 u32 saved_config_space[16]; /* config space saved at suspend time */
Shaohua Li41017f02006-02-08 17:11:38 +0800332 struct hlist_head saved_cap_space;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
334 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
335 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700336 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700337#ifdef CONFIG_PCI_MSI
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000338 struct list_head msi_list;
Neil Hormanda8d1c82011-10-06 14:08:18 -0400339 struct kset *msi_kset;
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700340#endif
Ben Hutchings94e61082008-03-05 16:52:39 +0000341 struct pci_vpd *vpd;
Joerg Roedel466b3dd2011-10-30 16:35:08 +0100342#ifdef CONFIG_PCI_ATS
Yu Zhaodd7cc442009-03-20 11:25:15 +0800343 union {
344 struct pci_sriov *sriov; /* SR-IOV capability related */
345 struct pci_dev *physfn; /* the PF this VF is associated with */
346 };
Yu Zhao302b4212009-05-18 13:51:32 +0800347 struct pci_ats *ats; /* Address Translation Service */
Yu Zhaod1b054d2009-03-20 11:25:11 +0800348#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349};
350
Yinghaidda56542010-04-09 01:07:55 +0100351static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
352{
353#ifdef CONFIG_PCI_IOV
354 if (dev->is_virtfn)
355 dev = dev->physfn;
356#endif
357
358 return dev;
359}
360
Michael Ellerman65891212007-04-05 17:19:08 +1000361extern struct pci_dev *alloc_pci_dev(void);
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363#define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
364#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
365#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
366
Linas Vepstasa7369f12006-12-12 16:55:59 -0600367static inline int pci_channel_offline(struct pci_dev *pdev)
368{
369 return (pdev->error_state != pci_channel_io_normal);
370}
371
Shaohua Li41017f02006-02-08 17:11:38 +0800372static inline struct pci_cap_saved_state *pci_find_saved_cap(
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800373 struct pci_dev *pci_dev, char cap)
Shaohua Li41017f02006-02-08 17:11:38 +0800374{
375 struct pci_cap_saved_state *tmp;
376 struct hlist_node *pos;
377
378 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
Alex Williamson24a4742f2011-05-10 10:02:11 -0600379 if (tmp->cap.cap_nr == cap)
Shaohua Li41017f02006-02-08 17:11:38 +0800380 return tmp;
381 }
382 return NULL;
383}
384
385static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
386 struct pci_cap_saved_state *new_cap)
387{
388 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
389}
390
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700391/*
392 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
393 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
394 * buses below host bridges or subtractive decode bridges) go in the list.
395 * Use pci_bus_for_each_resource() to iterate through all the resources.
396 */
397
398/*
399 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
400 * and there's no way to program the bridge with the details of the window.
401 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
402 * decode bit set, because they are explicit and can be programmed with _SRS.
403 */
404#define PCI_SUBTRACTIVE_DECODE 0x1
405
406struct pci_bus_resource {
407 struct list_head list;
408 struct resource *res;
409 unsigned int flags;
410};
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700411
412#define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
414struct pci_bus {
415 struct list_head node; /* node in list of buses */
416 struct pci_bus *parent; /* parent bus this bridge is on */
417 struct list_head children; /* list of child buses */
418 struct list_head devices; /* list of devices on this bus */
419 struct pci_dev *self; /* bridge device as seen by parent */
Alex Chiangf46753c2008-06-10 15:28:50 -0600420 struct list_head slots; /* list of slots on this bus */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700421 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
422 struct list_head resources; /* address space routed to this bus */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
424 struct pci_ops *ops; /* configuration access functions */
425 void *sysdata; /* hook for sys-specific extension */
426 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
427
428 unsigned char number; /* bus number */
429 unsigned char primary; /* number of primary bridge */
430 unsigned char secondary; /* number of secondary bridge */
431 unsigned char subordinate; /* max number of subordinate buses */
Matthew Wilcox3749c512009-12-13 08:11:32 -0500432 unsigned char max_bus_speed; /* enum pci_bus_speed */
433 unsigned char cur_bus_speed; /* enum pci_bus_speed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
435 char name[48];
436
437 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200438 pci_bus_flags_t bus_flags; /* Inherited by child busses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 struct device *bridge;
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400440 struct device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
442 struct bin_attribute *legacy_mem; /* legacy mem */
Greg Kroah-Hartmancc74d962008-03-12 21:48:03 -0700443 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444};
445
446#define pci_bus_b(n) list_entry(n, struct pci_bus, node)
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400447#define to_pci_bus(n) container_of(n, struct pci_bus, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
Kenji Kaneshige79af72d2009-03-20 14:55:55 -0600449/*
450 * Returns true if the pci bus is root (behind host-pci bridge),
451 * false otherwise
452 */
453static inline bool pci_is_root_bus(struct pci_bus *pbus)
454{
455 return !(pbus->parent);
456}
457
Rafael J. Wysocki16cf0eb2009-01-05 14:50:27 +0100458#ifdef CONFIG_PCI_MSI
459static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
460{
461 return pci_dev->msi_enabled || pci_dev->msix_enabled;
462}
463#else
464static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
465#endif
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467/*
468 * Error values that may be returned by PCI functions.
469 */
470#define PCIBIOS_SUCCESSFUL 0x00
471#define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
472#define PCIBIOS_BAD_VENDOR_ID 0x83
473#define PCIBIOS_DEVICE_NOT_FOUND 0x86
474#define PCIBIOS_BAD_REGISTER_NUMBER 0x87
475#define PCIBIOS_SET_FAILED 0x88
476#define PCIBIOS_BUFFER_TOO_SMALL 0x89
477
478/* Low-level architecture-dependent routines */
479
480struct pci_ops {
481 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
482 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
483};
484
Matthew Wilcoxb6ce0682008-02-10 09:45:28 -0500485/*
486 * ACPI needs to be able to access PCI config space before we've done a
487 * PCI bus scan and created pci_bus structures.
488 */
489extern int raw_pci_read(unsigned int domain, unsigned int bus,
490 unsigned int devfn, int reg, int len, u32 *val);
491extern int raw_pci_write(unsigned int domain, unsigned int bus,
492 unsigned int devfn, int reg, int len, u32 val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
494struct pci_bus_region {
Benjamin Herrenschmidtc40a22e2007-12-10 17:32:15 +1100495 resource_size_t start;
496 resource_size_t end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497};
498
499struct pci_dynids {
500 spinlock_t lock; /* protects list, index */
501 struct list_head list; /* for IDs added at runtime */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502};
503
linas392a1ce2005-11-16 17:10:41 -0600504/* ---------------------------------------------------------------- */
505/** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
Rolf Eike Beer579082d2007-07-10 13:35:05 +0200506 * a set of callbacks in struct pci_error_handlers, then that device driver
linas392a1ce2005-11-16 17:10:41 -0600507 * will be notified of PCI bus errors, and will be driven to recovery
508 * when an error occurs.
509 */
510
511typedef unsigned int __bitwise pci_ers_result_t;
512
513enum pci_ers_result {
514 /* no result/none/not supported in device driver */
515 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
516
517 /* Device driver can recover without slot reset */
518 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
519
520 /* Device driver wants slot to be reset. */
521 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
522
523 /* Device has completely failed, is unrecoverable */
524 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
525
526 /* Device driver is fully recovered and operational */
527 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
528};
529
530/* PCI bus error event callbacks */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800531struct pci_error_handlers {
linas392a1ce2005-11-16 17:10:41 -0600532 /* PCI bus error detected on this device */
533 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800534 enum pci_channel_state error);
linas392a1ce2005-11-16 17:10:41 -0600535
536 /* MMIO has been re-enabled, but not DMA */
537 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
538
539 /* PCI Express link has been reset */
540 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
541
542 /* PCI slot has been reset */
543 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
544
545 /* Device driver may resume normal operations */
546 void (*resume)(struct pci_dev *dev);
547};
548
549/* ---------------------------------------------------------------- */
550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551struct module;
552struct pci_driver {
553 struct list_head node;
Stephen Hemminger42b21932010-09-02 14:28:51 -0700554 const char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
556 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
557 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
558 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700559 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
560 int (*resume_early) (struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 int (*resume) (struct pci_dev *dev); /* Device woken up */
Greg KHc8958172005-04-08 14:53:31 +0900562 void (*shutdown) (struct pci_dev *dev);
linas392a1ce2005-11-16 17:10:41 -0600563 struct pci_error_handlers *err_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 struct device_driver driver;
565 struct pci_dynids dynids;
566};
567
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800568#define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
570/**
Andrew Morton9f9351b2008-03-10 11:43:34 -0700571 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100572 * @_table: device table name
573 *
574 * This macro is used to create a struct pci_device_id array (a device table)
575 * in a generic manner.
576 */
Andrew Morton9f9351b2008-03-10 11:43:34 -0700577#define DEFINE_PCI_DEVICE_TABLE(_table) \
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100578 const struct pci_device_id _table[] __devinitconst
579
580/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 * PCI_DEVICE - macro used to describe a specific pci device
582 * @vend: the 16 bit PCI Vendor ID
583 * @dev: the 16 bit PCI Device ID
584 *
585 * This macro is used to create a struct pci_device_id that matches a
586 * specific device. The subvendor and subdevice fields will be set to
587 * PCI_ANY_ID.
588 */
589#define PCI_DEVICE(vend,dev) \
590 .vendor = (vend), .device = (dev), \
591 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
592
593/**
594 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
595 * @dev_class: the class, subclass, prog-if triple for this device
596 * @dev_class_mask: the class mask for this device
597 *
598 * This macro is used to create a struct pci_device_id that matches a
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700599 * specific PCI class. The vendor, device, subvendor, and subdevice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 * fields will be set to PCI_ANY_ID.
601 */
602#define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
603 .class = (dev_class), .class_mask = (dev_class_mask), \
604 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
605 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
606
Alan Cox1597cac2006-12-04 15:14:45 -0800607/**
608 * PCI_VDEVICE - macro used to describe a specific pci device in short form
Zhao, Yuc322b282008-10-13 19:36:05 +0800609 * @vendor: the vendor name
610 * @device: the 16 bit PCI Device ID
Alan Cox1597cac2006-12-04 15:14:45 -0800611 *
612 * This macro is used to create a struct pci_device_id that matches a
613 * specific PCI device. The subvendor, and subdevice fields will be set
614 * to PCI_ANY_ID. The macro allows the next field to follow as the device
615 * private data.
616 */
617
618#define PCI_VDEVICE(vendor, device) \
619 PCI_VENDOR_ID_##vendor, (device), \
620 PCI_ANY_ID, PCI_ANY_ID, 0, 0
621
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622/* these external functions are only available when PCI support is enabled */
623#ifdef CONFIG_PCI
624
Jon Masonb03e7492011-07-20 15:20:54 -0500625extern void pcie_bus_configure_settings(struct pci_bus *bus, u8 smpss);
626
627enum pcie_bus_config_types {
Jon Mason5f39e672011-10-03 09:50:20 -0500628 PCIE_BUS_TUNE_OFF,
Jon Masonb03e7492011-07-20 15:20:54 -0500629 PCIE_BUS_SAFE,
Jon Mason5f39e672011-10-03 09:50:20 -0500630 PCIE_BUS_PERFORMANCE,
Jon Masonb03e7492011-07-20 15:20:54 -0500631 PCIE_BUS_PEER2PEER,
632};
633
634extern enum pcie_bus_config_types pcie_bus_config;
635
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636extern struct bus_type pci_bus_type;
637
638/* Do NOT directly access these two variables, unless you are arch specific pci
639 * code, or pci core code. */
640extern struct list_head pci_root_buses; /* list of all known PCI buses */
Zhang, Yanmined4aaad2007-07-15 23:39:39 -0700641/* Some device drivers need know if pci is initiated */
642extern int no_pci_devices(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643
644void pcibios_fixup_bus(struct pci_bus *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700645int __must_check pcibios_enable_device(struct pci_dev *, int mask);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800646char *pcibios_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
648/* Used only when drivers/pci/setup.c is used */
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100649resource_size_t pcibios_align_resource(void *, const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100650 resource_size_t,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700651 resource_size_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652void pcibios_update_irq(struct pci_dev *, int irq);
653
Benjamin Herrenschmidt2d1c8612009-12-09 17:52:13 +1100654/* Weak but can be overriden by arch */
655void pci_fixup_cardbus(struct pci_bus *);
656
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657/* Generic PCI functions used internally */
658
Mauro Carvalho Chehabd1fd4fb2009-07-10 18:39:53 -0300659void pcibios_scan_specific_bus(int busn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660extern struct pci_bus *pci_find_bus(int domain, int busnr);
akpm@linux-foundation.orgc48f1672009-02-03 15:45:26 -0800661void pci_bus_add_devices(const struct pci_bus *bus);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800662struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
663 struct pci_ops *ops, void *sysdata);
Bjorn Helgaasde4b2f72011-10-28 16:25:55 -0600664struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
Bjorn Helgaas166c6372011-10-28 16:25:45 -0600665struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
666 struct pci_ops *ops, void *sysdata,
667 struct list_head *resources);
Bjorn Helgaasa2ebb822011-10-28 16:25:50 -0600668struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, int bus,
669 struct pci_ops *ops, void *sysdata,
670 struct list_head *resources);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800671struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
672 int busnr);
Matthew Wilcox3749c512009-12-13 08:11:32 -0500673void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
Alex Chiangf46753c2008-06-10 15:28:50 -0600674struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
Alex Chiang828f3762008-10-20 17:40:52 -0600675 const char *name,
676 struct hotplug_slot *hotplug);
Alex Chiangf46753c2008-06-10 15:28:50 -0600677void pci_destroy_slot(struct pci_slot *slot);
Alex Chiangd25b7c82008-10-20 17:40:47 -0600678void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679int pci_scan_slot(struct pci_bus *bus, int devfn);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800680struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
Paul Mackerrascdb9b9f2005-09-06 09:31:03 +1000681void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682unsigned int pci_scan_child_bus(struct pci_bus *bus);
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700683int __must_check pci_bus_add_device(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684void pci_read_bridge_bases(struct pci_bus *child);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800685struct resource *pci_find_parent_resource(const struct pci_dev *dev,
686 struct resource *res);
Bjorn Helgaas57c2cf72008-12-11 11:24:23 -0700687u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
Bjorn Helgaas68feac82008-12-16 21:36:55 -0700689u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
691extern void pci_dev_put(struct pci_dev *dev);
692extern void pci_remove_bus(struct pci_bus *b);
693extern void pci_remove_bus_device(struct pci_dev *dev);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700694extern void pci_stop_bus_device(struct pci_dev *dev);
Dominik Brodowskib3743fa2005-09-09 13:03:23 -0700695void pci_setup_cardbus(struct pci_bus *bus);
Matt Domsch6b4b78f2006-09-29 15:23:23 -0500696extern void pci_sort_breadthfirst(void);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +0000697#define dev_is_pci(d) ((d)->bus == &pci_bus_type)
698#define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
699#define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701/* Generic PCI functions exported to card drivers */
702
James Bottomley388c8c12008-08-03 13:02:12 -0500703enum pci_lost_interrupt_reason {
704 PCI_LOST_IRQ_NO_INFORMATION = 0,
705 PCI_LOST_IRQ_DISABLE_MSI,
706 PCI_LOST_IRQ_DISABLE_MSIX,
707 PCI_LOST_IRQ_DISABLE_ACPI,
708};
709enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800710int pci_find_capability(struct pci_dev *dev, int cap);
711int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
712int pci_find_ext_capability(struct pci_dev *dev, int cap);
Jesse Barnescf4c43d2009-07-15 13:13:00 -0700713int pci_bus_find_ext_capability(struct pci_bus *bus, unsigned int devfn,
714 int cap);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800715int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
716int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
Alan Cox29f3eb62006-10-16 16:20:21 -0700717struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
Andrew Mortond42552c2006-10-21 10:24:12 -0700719struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
720 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800721struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 unsigned int ss_vendor, unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -0700723 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800724struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
Andrew Patterson3c299dc2009-10-12 13:14:00 -0600725struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
726 unsigned int devfn);
727static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
728 unsigned int devfn)
729{
730 return pci_get_domain_bus_and_slot(0, bus, devfn);
731}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800732struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733int pci_dev_present(const struct pci_device_id *ids);
734
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800735int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
736 int where, u8 *val);
737int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
738 int where, u16 *val);
739int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
740 int where, u32 *val);
741int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
742 int where, u8 val);
743int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
744 int where, u16 val);
745int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
746 int where, u32 val);
Huang Yinga72b46c2009-04-24 10:45:17 +0800747struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
749static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
750{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800751 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752}
753static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
754{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800755 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800757static inline int pci_read_config_dword(struct pci_dev *dev, int where,
758 u32 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800760 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761}
762static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
763{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800764 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765}
766static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
767{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800768 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800770static inline int pci_write_config_dword(struct pci_dev *dev, int where,
771 u32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800773 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774}
775
Andrew Morton4a7fb632006-08-14 22:43:17 -0700776int __must_check pci_enable_device(struct pci_dev *dev);
Benjamin Herrenschmidtb7189892007-12-20 15:28:08 +1100777int __must_check pci_enable_device_io(struct pci_dev *dev);
778int __must_check pci_enable_device_mem(struct pci_dev *dev);
Tejun Heo0b62e132007-07-27 14:43:35 +0900779int __must_check pci_reenable_device(struct pci_dev *);
Tejun Heo9ac78492007-01-20 16:00:26 +0900780int __must_check pcim_enable_device(struct pci_dev *pdev);
781void pcim_pin_device(struct pci_dev *pdev);
782
Yuji Shimada296ccb02009-04-03 16:41:46 +0900783static inline int pci_is_enabled(struct pci_dev *pdev)
784{
785 return (atomic_read(&pdev->enable_cnt) > 0);
786}
787
Tejun Heo9ac78492007-01-20 16:00:26 +0900788static inline int pci_is_managed(struct pci_dev *pdev)
789{
790 return pdev->is_managed;
791}
792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793void pci_disable_device(struct pci_dev *dev);
Myron Stowe96c55902011-10-28 15:48:38 -0600794
795extern unsigned int pcibios_max_latency;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796void pci_set_master(struct pci_dev *dev);
Ben Hutchings6a479072008-12-23 03:08:29 +0000797void pci_clear_master(struct pci_dev *dev);
Myron Stowe96c55902011-10-28 15:48:38 -0600798
Brian Kingf7bdd122007-04-06 16:39:36 -0500799int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
Tejun Heo15ea76d2009-09-22 17:34:48 +0900800int pci_set_cacheline_size(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801#define HAVE_PCI_SET_MWI
Andrew Morton4a7fb632006-08-14 22:43:17 -0700802int __must_check pci_set_mwi(struct pci_dev *dev);
Randy Dunlap694625c2007-07-09 11:55:54 -0700803int pci_try_set_mwi(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804void pci_clear_mwi(struct pci_dev *dev);
Brett M Russa04ce0f2005-08-15 15:23:41 -0400805void pci_intx(struct pci_dev *dev, int enable);
Jan Kiszkaa2e27782011-11-04 09:46:00 +0100806bool pci_intx_mask_supported(struct pci_dev *dev);
807bool pci_check_and_mask_intx(struct pci_dev *dev);
808bool pci_check_and_unmask_intx(struct pci_dev *dev);
Eric W. Biedermanf5f2b132007-03-05 00:30:07 -0800809void pci_msi_off(struct pci_dev *dev);
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800810int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -0800811int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
Peter Orubad556ad42007-05-15 13:59:13 +0200812int pcix_get_max_mmrbc(struct pci_dev *dev);
813int pcix_get_mmrbc(struct pci_dev *dev);
814int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
Brice Goglin2637e5b2007-08-14 12:43:48 +0200815int pcie_get_readrq(struct pci_dev *dev);
Peter Orubad556ad42007-05-15 13:59:13 +0200816int pcie_set_readrq(struct pci_dev *dev, int rq);
Jon Masonb03e7492011-07-20 15:20:54 -0500817int pcie_get_mps(struct pci_dev *dev);
818int pcie_set_mps(struct pci_dev *dev, int mps);
Yu Zhao8c1c6992009-06-13 15:52:13 +0800819int __pci_reset_function(struct pci_dev *dev);
Sheng Yang8dd7f802008-10-21 17:38:25 +0800820int pci_reset_function(struct pci_dev *dev);
Yu Zhao14add802008-11-22 02:38:52 +0800821void pci_update_resource(struct pci_dev *dev, int resno);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700822int __must_check pci_assign_resource(struct pci_dev *dev, int i);
Ram Pai2bbc6942011-07-25 13:08:39 -0700823int __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 +0900824int pci_select_bars(struct pci_dev *dev, unsigned long flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826/* ROM control related routines */
Alan Coxe416de52008-09-23 17:25:10 +0100827int pci_enable_rom(struct pci_dev *pdev);
828void pci_disable_rom(struct pci_dev *pdev);
Dave Jones144a50e2005-08-09 00:20:10 -0400829void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
Timothy S. Nelson97c44832009-01-30 06:12:47 +1100831size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
833/* Power management related routines */
834int pci_save_state(struct pci_dev *dev);
Jon Mason1d3c16a2010-11-30 17:43:26 -0600835void pci_restore_state(struct pci_dev *dev);
Alex Williamsonffbdd3f2011-05-10 10:02:27 -0600836struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
837int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state);
838int pci_load_and_free_saved_state(struct pci_dev *dev,
839 struct pci_saved_state **state);
Rafael J. Wysocki0e5dd462009-03-26 22:51:40 +0100840int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
Linus Torvalds9c8550e2005-09-09 15:43:46 -0700841int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
842pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200843bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
Rafael J. Wysocki5a6c9b62008-08-08 00:14:24 +0200844void pci_pme_active(struct pci_dev *dev, bool enable);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100845int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
846 bool runtime, bool enable);
Rafael J. Wysocki0235c4f2008-08-18 21:38:00 +0200847int pci_wake_from_d3(struct pci_dev *dev, bool enable);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200848pci_power_t pci_target_state(struct pci_dev *dev);
Rafael J. Wysocki404cc2d2008-07-07 03:35:26 +0200849int pci_prepare_to_sleep(struct pci_dev *dev);
850int pci_back_from_sleep(struct pci_dev *dev);
Rafael J. Wysockib67ea762010-02-17 23:44:09 +0100851bool pci_dev_run_wake(struct pci_dev *dev);
Matthew Garrettbf4d2902010-10-04 14:22:26 -0400852bool pci_check_pme_status(struct pci_dev *dev);
Matthew Garrettbf4d2902010-10-04 14:22:26 -0400853void pci_pme_wakeup_bus(struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100855static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
856 bool enable)
857{
858 return __pci_enable_wake(dev, state, false, enable);
859}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
Jesse Barnesb48d4422010-10-19 13:07:57 -0700861#define PCI_EXP_IDO_REQUEST (1<<0)
862#define PCI_EXP_IDO_COMPLETION (1<<1)
863void pci_enable_ido(struct pci_dev *dev, unsigned long type);
864void pci_disable_ido(struct pci_dev *dev, unsigned long type);
865
Jesse Barnes48a92a82011-01-10 12:46:36 -0800866enum pci_obff_signal_type {
Myron Stowe688398b2011-07-07 15:00:36 -0600867 PCI_EXP_OBFF_SIGNAL_L0 = 0,
868 PCI_EXP_OBFF_SIGNAL_ALWAYS = 1,
Jesse Barnes48a92a82011-01-10 12:46:36 -0800869};
870int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type);
871void pci_disable_obff(struct pci_dev *dev);
872
Jesse Barnes51c2e0a2011-01-14 08:53:04 -0800873bool pci_ltr_supported(struct pci_dev *dev);
874int pci_enable_ltr(struct pci_dev *dev);
875void pci_disable_ltr(struct pci_dev *dev);
876int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns);
877
Benjamin Herrenschmidtbb209c82010-01-26 17:10:03 +0000878/* For use by arch with custom probe code */
879void set_pcie_port_type(struct pci_dev *pdev);
880void set_pcie_hotplug_bridge(struct pci_dev *pdev);
881
Kumar Galace5ccde2007-07-16 23:27:10 -0500882/* Functions for PCI Hotplug drivers to use */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800883int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
Alex Chiang3ed4fd92009-03-20 14:56:25 -0600884#ifdef CONFIG_HOTPLUG
885unsigned int pci_rescan_bus(struct pci_bus *bus);
886#endif
Kumar Galace5ccde2007-07-16 23:27:10 -0500887
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800888/* Vital product data routines */
889ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
890ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
Stephen Hemmingerdb567942008-12-18 09:17:16 -0800891int pci_vpd_truncate(struct pci_dev *dev, size_t size);
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800892
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
Andrew Mortonea741552009-02-18 10:44:29 -0800894void pci_bus_assign_resources(const struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895void pci_bus_size_bridges(struct pci_bus *bus);
896int pci_claim_resource(struct pci_dev *, int);
897void pci_assign_unassigned_resources(void);
Yinghai Lu6841ec62010-01-22 01:02:25 -0800898void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899void pdev_enable_device(struct pci_dev *);
900void pdev_sort_resources(struct pci_dev *, struct resource_list *);
Bjorn Helgaas842de402008-03-04 11:56:47 -0700901int pci_enable_resources(struct pci_dev *, int mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
Ralf Baechled5341942011-06-10 15:30:21 +0100903 int (*)(const struct pci_dev *, u8, u8));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904#define HAVE_PCI_REQ_REGIONS 2
Andrew Morton4a7fb632006-08-14 22:43:17 -0700905int __must_check pci_request_regions(struct pci_dev *, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700906int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907void pci_release_regions(struct pci_dev *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700908int __must_check pci_request_region(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700909int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910void pci_release_region(struct pci_dev *, int);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900911int pci_request_selected_regions(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700912int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900913void pci_release_selected_regions(struct pci_dev *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914
915/* drivers/pci/bus.c */
Bjorn Helgaas45ca9e92011-10-28 16:25:35 -0600916void pci_add_resource(struct list_head *resources, struct resource *res);
917void pci_free_resource_list(struct list_head *resources);
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700918void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
919struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
920void pci_bus_remove_resources(struct pci_bus *bus);
921
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700922#define pci_bus_for_each_resource(bus, res, i) \
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700923 for (i = 0; \
924 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
925 i++)
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700926
Andrew Morton4a7fb632006-08-14 22:43:17 -0700927int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
928 struct resource *res, resource_size_t size,
929 resource_size_t align, resource_size_t min,
930 unsigned int type_mask,
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100931 resource_size_t (*alignf)(void *,
932 const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100933 resource_size_t,
934 resource_size_t),
Andrew Morton4a7fb632006-08-14 22:43:17 -0700935 void *alignf_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936void pci_enable_bridges(struct pci_bus *bus);
937
Laurent riffard863b18f2005-10-27 23:12:54 +0200938/* Proper probing supporting hot-pluggable devices */
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -0800939int __must_check __pci_register_driver(struct pci_driver *, struct module *,
940 const char *mod_name);
Andrew Mortonbba81162008-07-30 12:07:04 -0700941
942/*
943 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
944 */
945#define pci_register_driver(driver) \
946 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
Laurent riffard863b18f2005-10-27 23:12:54 +0200947
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800948void pci_unregister_driver(struct pci_driver *dev);
949void pci_remove_behind_bridge(struct pci_dev *dev);
950struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
Tejun Heo9dba9102009-09-03 15:26:36 +0900951int pci_add_dynid(struct pci_driver *drv,
952 unsigned int vendor, unsigned int device,
953 unsigned int subvendor, unsigned int subdevice,
954 unsigned int class, unsigned int class_mask,
955 unsigned long driver_data);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800956const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
957 struct pci_dev *dev);
958int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
959 int pass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Zhang, Yanmin70298c62009-06-16 13:34:38 +0800961void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
Paul Mackerrascecf4862005-08-18 14:33:01 +1000962 void *userdata);
Yinghai Lu70b9f7d2008-04-28 16:27:23 -0700963int pci_cfg_space_size_ext(struct pci_dev *dev);
Benjamin Herrenschmidtac7dc652005-12-13 18:09:16 +1100964int pci_cfg_space_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800965unsigned char pci_bus_max_busnr(struct pci_bus *bus);
Benjamin Herrenschmidte2444272011-09-11 14:08:38 -0300966void pci_setup_bridge(struct pci_bus *bus);
Paul Mackerrascecf4862005-08-18 14:33:01 +1000967
Dave Airlie3448a192010-06-01 15:32:24 +1000968#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
969#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
970
Benjamin Herrenschmidtdeb2d2e2009-08-11 15:52:06 +1000971int pci_set_vga_state(struct pci_dev *pdev, bool decode,
Dave Airlie3448a192010-06-01 15:32:24 +1000972 unsigned int command_bits, u32 flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973/* kmem_cache style wrapper around pci_alloc_consistent() */
974
FUJITA Tomonorif41b1772010-03-10 15:23:30 -0800975#include <linux/pci-dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976#include <linux/dmapool.h>
977
978#define pci_pool dma_pool
979#define pci_pool_create(name, pdev, size, align, allocation) \
980 dma_pool_create(name, &pdev->dev, size, align, allocation)
981#define pci_pool_destroy(pool) dma_pool_destroy(pool)
982#define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
983#define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
984
David S. Millere24c2d92005-06-02 12:55:50 -0700985enum pci_dma_burst_strategy {
986 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
987 strategy_parameter is N/A */
988 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
989 byte boundaries */
990 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
991 strategy_parameter byte boundaries */
992};
993
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994struct msix_entry {
Yinghai Lu16dbef42008-08-15 19:36:45 -0700995 u32 vector; /* kernel uses to write allocated vector */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 u16 entry; /* driver uses to specify entry, OS writes */
997};
998
Eric W. Biederman0366f8f2006-10-04 02:16:33 -0700999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000#ifndef CONFIG_PCI_MSI
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001001static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001002{
1003 return -1;
1004}
1005
Yinghai Lud52877c2008-04-23 14:58:09 -07001006static inline void pci_msi_shutdown(struct pci_dev *dev)
1007{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001008static inline void pci_disable_msi(struct pci_dev *dev)
1009{ }
1010
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +01001011static inline int pci_msix_table_size(struct pci_dev *dev)
1012{
1013 return 0;
1014}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001015static inline int pci_enable_msix(struct pci_dev *dev,
1016 struct msix_entry *entries, int nvec)
1017{
1018 return -1;
1019}
1020
Yinghai Lud52877c2008-04-23 14:58:09 -07001021static inline void pci_msix_shutdown(struct pci_dev *dev)
1022{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001023static inline void pci_disable_msix(struct pci_dev *dev)
1024{ }
1025
1026static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
1027{ }
1028
1029static inline void pci_restore_msi_state(struct pci_dev *dev)
1030{ }
Andrew Patterson07ae95f2008-11-10 15:31:05 -07001031static inline int pci_msi_enabled(void)
1032{
1033 return 0;
1034}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035#else
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001036extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -07001037extern void pci_msi_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038extern void pci_disable_msi(struct pci_dev *dev);
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +01001039extern int pci_msix_table_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001040extern int pci_enable_msix(struct pci_dev *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 struct msix_entry *entries, int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -07001042extern void pci_msix_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043extern void pci_disable_msix(struct pci_dev *dev);
1044extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
Linas Vepstas94688cf2007-11-07 15:43:59 -06001045extern void pci_restore_msi_state(struct pci_dev *dev);
Andrew Patterson07ae95f2008-11-10 15:31:05 -07001046extern int pci_msi_enabled(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047#endif
1048
Markus Trippelsdorfab0724f2011-01-15 00:07:22 +01001049#ifdef CONFIG_PCIEPORTBUS
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001050extern bool pcie_ports_disabled;
1051extern bool pcie_ports_auto;
Markus Trippelsdorfab0724f2011-01-15 00:07:22 +01001052#else
1053#define pcie_ports_disabled true
1054#define pcie_ports_auto false
1055#endif
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001056
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001057#ifndef CONFIG_PCIEASPM
Rafael J. Wysocki8b8bae92011-03-05 13:21:51 +01001058static inline int pcie_aspm_enabled(void) { return 0; }
1059static inline bool pcie_aspm_support_enabled(void) { return false; }
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001060#else
1061extern int pcie_aspm_enabled(void);
Rafael J. Wysocki8b8bae92011-03-05 13:21:51 +01001062extern bool pcie_aspm_support_enabled(void);
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001063#endif
1064
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001065#ifdef CONFIG_PCIEAER
1066void pci_no_aer(void);
1067bool pci_aer_available(void);
1068#else
1069static inline void pci_no_aer(void) { }
1070static inline bool pci_aer_available(void) { return false; }
1071#endif
1072
Andrew Patterson43c16402009-04-22 16:52:09 -06001073#ifndef CONFIG_PCIE_ECRC
1074static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
1075{
1076 return;
1077}
1078static inline void pcie_ecrc_get_policy(char *str) {};
1079#else
1080extern void pcie_set_ecrc_checking(struct pci_dev *dev);
1081extern void pcie_ecrc_get_policy(char *str);
1082#endif
1083
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001084#define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
1085
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001086#ifdef CONFIG_HT_IRQ
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001087/* The functions a driver should call */
1088int ht_create_irq(struct pci_dev *dev, int idx);
1089void ht_destroy_irq(unsigned int irq);
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001090#endif /* CONFIG_HT_IRQ */
1091
Jan Kiszkafb51ccb2011-11-04 09:45:59 +01001092extern void pci_cfg_access_lock(struct pci_dev *dev);
1093extern bool pci_cfg_access_trylock(struct pci_dev *dev);
1094extern void pci_cfg_access_unlock(struct pci_dev *dev);
Brian Kinge04b0ea2005-09-27 01:21:55 -07001095
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001096/*
1097 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1098 * a PCI domain is defined to be a set of PCI busses which share
1099 * configuration space.
1100 */
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001101#ifdef CONFIG_PCI_DOMAINS
1102extern int pci_domains_supported;
1103#else
1104enum { pci_domains_supported = 0 };
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001105static inline int pci_domain_nr(struct pci_bus *bus)
1106{
1107 return 0;
1108}
1109
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001110static inline int pci_proc_domain(struct pci_bus *bus)
1111{
1112 return 0;
1113}
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001114#endif /* CONFIG_PCI_DOMAINS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115
Mike Travis95a8b6e2010-02-02 14:38:13 -08001116/* some architectures require additional setup to direct VGA traffic */
1117typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
Dave Airlie3448a192010-06-01 15:32:24 +10001118 unsigned int command_bits, u32 flags);
Mike Travis95a8b6e2010-02-02 14:38:13 -08001119extern void pci_register_set_vga_state(arch_set_vga_state_t func);
1120
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001121#else /* CONFIG_PCI is not enabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122
1123/*
1124 * If the system does not have PCI, clearly these return errors. Define
1125 * these as simple inline functions to avoid hair in drivers.
1126 */
1127
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001128#define _PCI_NOP(o, s, t) \
1129 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1130 int where, t val) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001132
1133#define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1134 _PCI_NOP(o, word, u16 x) \
1135 _PCI_NOP(o, dword, u32 x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136_PCI_NOP_ALL(read, *)
1137_PCI_NOP_ALL(write,)
1138
Andrew Mortond42552c2006-10-21 10:24:12 -07001139static inline struct pci_dev *pci_get_device(unsigned int vendor,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001140 unsigned int device,
1141 struct pci_dev *from)
1142{
1143 return NULL;
1144}
Andrew Mortond42552c2006-10-21 10:24:12 -07001145
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001146static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1147 unsigned int device,
1148 unsigned int ss_vendor,
1149 unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -07001150 struct pci_dev *from)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001151{
1152 return NULL;
1153}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001155static inline struct pci_dev *pci_get_class(unsigned int class,
1156 struct pci_dev *from)
1157{
1158 return NULL;
1159}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160
1161#define pci_dev_present(ids) (0)
Zhang, Yanmined4aaad2007-07-15 23:39:39 -07001162#define no_pci_devices() (1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163#define pci_dev_put(dev) do { } while (0)
1164
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001165static inline void pci_set_master(struct pci_dev *dev)
1166{ }
1167
1168static inline int pci_enable_device(struct pci_dev *dev)
1169{
1170 return -EIO;
1171}
1172
1173static inline void pci_disable_device(struct pci_dev *dev)
1174{ }
1175
1176static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1177{
1178 return -EIO;
1179}
1180
Randy Dunlap80be0382008-06-30 11:35:53 -07001181static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1182{
1183 return -EIO;
1184}
1185
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -08001186static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1187 unsigned int size)
1188{
1189 return -EIO;
1190}
1191
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -08001192static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1193 unsigned long mask)
1194{
1195 return -EIO;
1196}
1197
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001198static inline int pci_assign_resource(struct pci_dev *dev, int i)
1199{
1200 return -EBUSY;
1201}
1202
1203static inline int __pci_register_driver(struct pci_driver *drv,
1204 struct module *owner)
1205{
1206 return 0;
1207}
1208
1209static inline int pci_register_driver(struct pci_driver *drv)
1210{
1211 return 0;
1212}
1213
1214static inline void pci_unregister_driver(struct pci_driver *drv)
1215{ }
1216
1217static inline int pci_find_capability(struct pci_dev *dev, int cap)
1218{
1219 return 0;
1220}
1221
1222static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1223 int cap)
1224{
1225 return 0;
1226}
1227
1228static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1229{
1230 return 0;
1231}
1232
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233/* Power management related routines */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001234static inline int pci_save_state(struct pci_dev *dev)
1235{
1236 return 0;
1237}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238
Jon Mason1d3c16a2010-11-30 17:43:26 -06001239static inline void pci_restore_state(struct pci_dev *dev)
1240{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001241
1242static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1243{
1244 return 0;
1245}
1246
Randy Dunlap34492482011-02-14 12:27:50 -08001247static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1248{
1249 return 0;
1250}
1251
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001252static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1253 pm_message_t state)
1254{
1255 return PCI_D0;
1256}
1257
1258static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1259 int enable)
1260{
1261 return 0;
1262}
1263
Jesse Barnesb48d4422010-10-19 13:07:57 -07001264static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type)
1265{
1266}
1267
1268static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type)
1269{
1270}
1271
Jesse Barnes48a92a82011-01-10 12:46:36 -08001272static inline int pci_enable_obff(struct pci_dev *dev, unsigned long type)
1273{
1274 return 0;
1275}
1276
1277static inline void pci_disable_obff(struct pci_dev *dev)
1278{
1279}
1280
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001281static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1282{
1283 return -EIO;
1284}
1285
1286static inline void pci_release_regions(struct pci_dev *dev)
1287{ }
Sergei Shtylyov0da0ead2007-04-01 21:13:58 +04001288
Kumar Galaa46e8122005-07-29 12:16:27 -07001289#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1290
Jan Kiszkafb51ccb2011-11-04 09:45:59 +01001291static inline void pci_block_cfg_access(struct pci_dev *dev)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001292{ }
1293
Jan Kiszkafb51ccb2011-11-04 09:45:59 +01001294static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1295{ return 0; }
1296
1297static inline void pci_unblock_cfg_access(struct pci_dev *dev)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001298{ }
Brian Kinge04b0ea2005-09-27 01:21:55 -07001299
Randy Dunlapd80d0212007-07-01 12:06:37 -07001300static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1301{ return NULL; }
1302
1303static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1304 unsigned int devfn)
1305{ return NULL; }
1306
1307static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1308 unsigned int devfn)
1309{ return NULL; }
1310
Dave Airlie92298e62010-08-13 10:22:17 +10001311static inline int pci_domain_nr(struct pci_bus *bus)
1312{ return 0; }
1313
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001314#define dev_is_pci(d) (false)
1315#define dev_is_pf(d) (false)
1316#define dev_num_vf(d) (0)
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001317#endif /* CONFIG_PCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001319/* Include architecture-dependent settings and functions */
1320
1321#include <asm/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322
Yinghai Lu1f82de12009-04-23 20:48:32 -07001323#ifndef PCIBIOS_MAX_MEM_32
1324#define PCIBIOS_MAX_MEM_32 (-1)
1325#endif
1326
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327/* these helpers provide future and backwards compatibility
1328 * for accessing popular PCI BAR info */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001329#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1330#define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1331#define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332#define pci_resource_len(dev,bar) \
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001333 ((pci_resource_start((dev), (bar)) == 0 && \
1334 pci_resource_end((dev), (bar)) == \
1335 pci_resource_start((dev), (bar))) ? 0 : \
1336 \
1337 (pci_resource_end((dev), (bar)) - \
1338 pci_resource_start((dev), (bar)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339
1340/* Similar to the helpers above, these manipulate per-pci_dev
1341 * driver-specific data. They are really just a wrapper around
1342 * the generic device structure functions of these calls.
1343 */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001344static inline void *pci_get_drvdata(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345{
1346 return dev_get_drvdata(&pdev->dev);
1347}
1348
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001349static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350{
1351 dev_set_drvdata(&pdev->dev, data);
1352}
1353
1354/* If you want to know what to call your pci_dev, ask this function.
1355 * Again, it's a wrapper around the generic device.
1356 */
Alexey Zaytsev2fc90f62009-06-24 16:22:30 +04001357static inline const char *pci_name(const struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358{
Greg KHc6c4f072008-07-03 09:49:39 -07001359 return dev_name(&pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360}
1361
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001362
1363/* Some archs don't want to expose struct resource to userland as-is
1364 * in sysfs and /proc
1365 */
1366#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1367static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001368 const struct resource *rsrc, resource_size_t *start,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -07001369 resource_size_t *end)
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001370{
1371 *start = rsrc->start;
1372 *end = rsrc->end;
1373}
1374#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1375
1376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377/*
1378 * The world is not perfect and supplies us with broken PCI devices.
1379 * For at least a part of these bugs we need a work-around, so both
1380 * generic (drivers/pci/quirks.c) and per-architecture code can define
1381 * fixup hooks to be called for particular buggy devices.
1382 */
1383
1384struct pci_fixup {
1385 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1386 void (*hook)(struct pci_dev *dev);
1387};
1388
1389enum pci_fixup_pass {
1390 pci_fixup_early, /* Before probing BARs */
1391 pci_fixup_header, /* After reading configuration header */
1392 pci_fixup_final, /* Final phase of device fixups */
1393 pci_fixup_enable, /* pci_enable_device() time */
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001394 pci_fixup_resume, /* pci_device_resume() */
1395 pci_fixup_suspend, /* pci_device_suspend */
1396 pci_fixup_resume_early, /* pci_device_resume_early() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397};
1398
1399/* Anonymous variables would be nice... */
1400#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
Adrian Bunk3ff6eec2008-01-24 22:16:20 +01001401 static const struct pci_fixup __pci_fixup_##name __used \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 __attribute__((__section__(#section))) = { vendor, device, hook };
1403#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1404 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1405 vendor##device##hook, vendor, device, hook)
1406#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1407 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1408 vendor##device##hook, vendor, device, hook)
1409#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1410 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1411 vendor##device##hook, vendor, device, hook)
1412#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1413 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1414 vendor##device##hook, vendor, device, hook)
Alan Cox1597cac2006-12-04 15:14:45 -08001415#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1416 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1417 resume##vendor##device##hook, vendor, device, hook)
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001418#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1419 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1420 resume_early##vendor##device##hook, vendor, device, hook)
1421#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1422 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1423 suspend##vendor##device##hook, vendor, device, hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001425#ifdef CONFIG_PCI_QUIRKS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001427#else
1428static inline void pci_fixup_device(enum pci_fixup_pass pass,
1429 struct pci_dev *dev) {}
1430#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001432void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
Al Viro5ea81762007-02-11 15:41:31 +00001433void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001434void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
Yinghai Lufb7ebfe2012-01-04 15:50:02 -08001435int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
1436int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
Tejun Heo916fbfb2008-03-12 15:26:34 +09001437 const char *name);
Yinghai Lufb7ebfe2012-01-04 15:50:02 -08001438void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
Al Viro5ea81762007-02-11 15:41:31 +00001439
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440extern int pci_pci_problems;
Alan Cox236561e2006-09-30 23:27:03 -07001441#define PCIPCI_FAIL 1 /* No PCI PCI DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442#define PCIPCI_TRITON 2
1443#define PCIPCI_NATOMA 4
1444#define PCIPCI_VIAETBF 8
1445#define PCIPCI_VSFX 16
Alan Cox236561e2006-09-30 23:27:03 -07001446#define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1447#define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001449extern unsigned long pci_cardbus_io_size;
1450extern unsigned long pci_cardbus_mem_size;
David Howells491424c2009-12-14 14:13:44 +00001451extern u8 __devinitdata pci_dfl_cache_line_size;
Jesse Barnesac1aa472009-10-26 13:20:44 -07001452extern u8 pci_cache_line_size;
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001453
Eric W. Biederman28760482009-09-09 14:09:24 -07001454extern unsigned long pci_hotplug_io_size;
1455extern unsigned long pci_hotplug_mem_size;
1456
Myron Stowecfce9fb2011-10-28 15:47:35 -06001457/* Architecture specific versions may override these (weak) */
Adrian Bunk19792a02008-05-05 21:25:47 +03001458int pcibios_add_platform_entries(struct pci_dev *dev);
1459void pcibios_disable_device(struct pci_dev *dev);
Myron Stowecfce9fb2011-10-28 15:47:35 -06001460void pcibios_set_master(struct pci_dev *dev);
Adrian Bunk19792a02008-05-05 21:25:47 +03001461int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1462 enum pcie_reset_state state);
Michael Ellerman575e3342007-05-08 12:03:07 +10001463
Robert Hancock7752d5c2008-02-15 01:27:20 -08001464#ifdef CONFIG_PCI_MMCONFIG
Yinghai Lubb63b422008-02-28 23:56:50 -08001465extern void __init pci_mmcfg_early_init(void);
Robert Hancock7752d5c2008-02-15 01:27:20 -08001466extern void __init pci_mmcfg_late_init(void);
1467#else
Yinghai Lubb63b422008-02-28 23:56:50 -08001468static inline void pci_mmcfg_early_init(void) { }
Robert Hancock7752d5c2008-02-15 01:27:20 -08001469static inline void pci_mmcfg_late_init(void) { }
1470#endif
1471
Andrew Patterson0ef5f8f2008-11-10 15:30:50 -07001472int pci_ext_cfg_avail(struct pci_dev *dev);
1473
Andrew Morton1684f5d2008-12-01 14:30:30 -08001474void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
Arjan van de Venaa42d7c2008-09-28 16:36:11 -07001475
Yu Zhaodd7cc442009-03-20 11:25:15 +08001476#ifdef CONFIG_PCI_IOV
1477extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1478extern void pci_disable_sriov(struct pci_dev *dev);
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001479extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001480extern int pci_num_vf(struct pci_dev *dev);
Yu Zhaodd7cc442009-03-20 11:25:15 +08001481#else
1482static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1483{
1484 return -ENODEV;
1485}
1486static inline void pci_disable_sriov(struct pci_dev *dev)
1487{
1488}
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001489static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
1490{
1491 return IRQ_NONE;
1492}
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001493static inline int pci_num_vf(struct pci_dev *dev)
1494{
1495 return 0;
1496}
Yu Zhaodd7cc442009-03-20 11:25:15 +08001497#endif
1498
Kenji Kaneshigec825bc92009-06-16 11:01:25 +09001499#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1500extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
1501extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1502#endif
1503
Kenji Kaneshiged7b7e602009-11-11 14:29:54 +09001504/**
1505 * pci_pcie_cap - get the saved PCIe capability offset
1506 * @dev: PCI device
1507 *
1508 * PCIe capability offset is calculated at PCI device initialization
1509 * time and saved in the data structure. This function returns saved
1510 * PCIe capability offset. Using this instead of pci_find_capability()
1511 * reduces unnecessary search in the PCI configuration space. If you
1512 * need to calculate PCIe capability offset from raw device for some
1513 * reasons, please use pci_find_capability() instead.
1514 */
1515static inline int pci_pcie_cap(struct pci_dev *dev)
1516{
1517 return dev->pcie_cap;
1518}
1519
Kenji Kaneshige7eb776c2009-11-11 14:35:22 +09001520/**
1521 * pci_is_pcie - check if the PCI device is PCI Express capable
1522 * @dev: PCI device
1523 *
1524 * Retrun true if the PCI device is PCI Express capable, false otherwise.
1525 */
1526static inline bool pci_is_pcie(struct pci_dev *dev)
1527{
1528 return !!pci_pcie_cap(dev);
1529}
1530
Chris Wright5d990b62009-12-04 12:15:21 -08001531void pci_request_acs(void);
1532
Matt Carlsona2ce7662010-02-26 14:04:39 +00001533
Matt Carlson7ad506f2010-02-26 14:04:40 +00001534#define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1535#define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT)
1536
1537/* Large Resource Data Type Tag Item Names */
1538#define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1539#define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1540#define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1541
1542#define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1543#define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1544#define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1545
1546/* Small Resource Data Type Tag Item Names */
1547#define PCI_VPD_STIN_END 0x78 /* End */
1548
1549#define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1550
1551#define PCI_VPD_SRDT_TIN_MASK 0x78
1552#define PCI_VPD_SRDT_LEN_MASK 0x07
1553
1554#define PCI_VPD_LRDT_TAG_SIZE 3
1555#define PCI_VPD_SRDT_TAG_SIZE 1
Matt Carlsona2ce7662010-02-26 14:04:39 +00001556
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001557#define PCI_VPD_INFO_FLD_HDR_SIZE 3
1558
Matt Carlson4067a852010-02-26 14:04:43 +00001559#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1560#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1561#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
Matt Carlsond4894f32011-03-09 16:58:21 +00001562#define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
Matt Carlson4067a852010-02-26 14:04:43 +00001563
Matt Carlsona2ce7662010-02-26 14:04:39 +00001564/**
1565 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1566 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1567 *
1568 * Returns the extracted Large Resource Data Type length.
1569 */
1570static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1571{
1572 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1573}
1574
Matt Carlson7ad506f2010-02-26 14:04:40 +00001575/**
1576 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1577 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1578 *
1579 * Returns the extracted Small Resource Data Type length.
1580 */
1581static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1582{
1583 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1584}
1585
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001586/**
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001587 * pci_vpd_info_field_size - Extracts the information field length
1588 * @lrdt: Pointer to the beginning of an information field header
1589 *
1590 * Returns the extracted information field length.
1591 */
1592static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1593{
1594 return info_field[2];
1595}
1596
1597/**
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001598 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1599 * @buf: Pointer to buffered vpd data
1600 * @off: The offset into the buffer at which to begin the search
1601 * @len: The length of the vpd buffer
1602 * @rdt: The Resource Data Type to search for
1603 *
1604 * Returns the index where the Resource Data Type was found or
1605 * -ENOENT otherwise.
1606 */
1607int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1608
Matt Carlson4067a852010-02-26 14:04:43 +00001609/**
1610 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1611 * @buf: Pointer to buffered vpd data
1612 * @off: The offset into the buffer at which to begin the search
1613 * @len: The length of the buffer area, relative to off, in which to search
1614 * @kw: The keyword to search for
1615 *
1616 * Returns the index where the information field keyword was found or
1617 * -ENOENT otherwise.
1618 */
1619int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1620 unsigned int len, const char *kw);
1621
Benjamin Herrenschmidt98d9f30c82011-04-11 11:37:07 +10001622/* PCI <-> OF binding helpers */
1623#ifdef CONFIG_OF
1624struct device_node;
1625extern void pci_set_of_node(struct pci_dev *dev);
1626extern void pci_release_of_node(struct pci_dev *dev);
1627extern void pci_set_bus_of_node(struct pci_bus *bus);
1628extern void pci_release_bus_of_node(struct pci_bus *bus);
1629
1630/* Arch may override this (weak) */
1631extern struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus);
1632
Benjamin Herrenschmidt64099d92011-04-07 13:09:47 +10001633static inline struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
1634{
1635 return pdev ? pdev->dev.of_node : NULL;
1636}
1637
Benjamin Herrenschmidtef3b4f82011-04-11 11:34:33 +10001638static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
1639{
1640 return bus ? bus->dev.of_node : NULL;
1641}
1642
Benjamin Herrenschmidt98d9f30c82011-04-11 11:37:07 +10001643#else /* CONFIG_OF */
1644static inline void pci_set_of_node(struct pci_dev *dev) { }
1645static inline void pci_release_of_node(struct pci_dev *dev) { }
1646static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
1647static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
1648#endif /* CONFIG_OF */
1649
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +03001650/**
1651 * pci_find_upstream_pcie_bridge - find upstream PCIe-to-PCI bridge of a device
1652 * @pdev: the PCI device
1653 *
1654 * if the device is PCIE, return NULL
1655 * if the device isn't connected to a PCIe bridge (that is its parent is a
1656 * legacy PCI bridge and the bridge is directly connected to bus 0), return its
1657 * parent
1658 */
1659struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
1660
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661#endif /* __KERNEL__ */
1662#endif /* LINUX_PCI_H */