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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>
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -080052#include <asm/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 */
114 DEVICE_COUNT_RESOURCE
115};
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,
David Millerba698ad2007-10-25 01:16:30 -0700177};
178
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200179enum pci_irq_reroute_variant {
180 INTEL_IRQ_REROUTE_VARIANT = 1,
181 MAX_IRQ_REROUTE_VARIANTS = 3
182};
183
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200184typedef unsigned short __bitwise pci_bus_flags_t;
185enum pci_bus_flags {
Peter Orubad556ad42007-05-15 13:59:13 +0200186 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
187 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200188};
189
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500190/* Based on the PCI Hotplug Spec, but some values are made up by us */
191enum pci_bus_speed {
192 PCI_SPEED_33MHz = 0x00,
193 PCI_SPEED_66MHz = 0x01,
194 PCI_SPEED_66MHz_PCIX = 0x02,
195 PCI_SPEED_100MHz_PCIX = 0x03,
196 PCI_SPEED_133MHz_PCIX = 0x04,
197 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
198 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
199 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
200 PCI_SPEED_66MHz_PCIX_266 = 0x09,
201 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
202 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
Matthew Wilcox45b4cdd2009-12-13 08:11:34 -0500203 AGP_UNKNOWN = 0x0c,
204 AGP_1X = 0x0d,
205 AGP_2X = 0x0e,
206 AGP_4X = 0x0f,
207 AGP_8X = 0x10,
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500208 PCI_SPEED_66MHz_PCIX_533 = 0x11,
209 PCI_SPEED_100MHz_PCIX_533 = 0x12,
210 PCI_SPEED_133MHz_PCIX_533 = 0x13,
211 PCIE_SPEED_2_5GT = 0x14,
212 PCIE_SPEED_5_0GT = 0x15,
Matthew Wilcox9dfd97f2009-12-13 08:11:35 -0500213 PCIE_SPEED_8_0GT = 0x16,
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500214 PCI_SPEED_UNKNOWN = 0xff,
215};
216
Shaohua Li41017f02006-02-08 17:11:38 +0800217struct pci_cap_saved_state {
218 struct hlist_node next;
219 char cap_nr;
220 u32 data[0];
221};
222
Shaohua Li7d715a62008-02-25 09:46:41 +0800223struct pcie_link_state;
Jesse Barnesee694392008-04-28 12:30:35 -0700224struct pci_vpd;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800225struct pci_sriov;
Yu Zhao302b4212009-05-18 13:51:32 +0800226struct pci_ats;
Jesse Barnesee694392008-04-28 12:30:35 -0700227
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228/*
229 * The pci_dev structure is used to describe PCI devices.
230 */
231struct pci_dev {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 struct list_head bus_list; /* node in per-bus list */
233 struct pci_bus *bus; /* bus this device is on */
234 struct pci_bus *subordinate; /* bus this device bridges to */
235
236 void *sysdata; /* hook for sys-specific extension */
237 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
Alex Chiangf46753c2008-06-10 15:28:50 -0600238 struct pci_slot *slot; /* Physical slot this device is in */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
240 unsigned int devfn; /* encoded device & function index */
241 unsigned short vendor;
242 unsigned short device;
243 unsigned short subsystem_vendor;
244 unsigned short subsystem_device;
245 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
Auke Kokb8a3a522007-06-08 15:46:30 -0700246 u8 revision; /* PCI revision, low byte of class word */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
Kenji Kaneshige0efea002009-11-05 12:05:11 +0900248 u8 pcie_cap; /* PCI-E capability offset */
Keshavamurthy, Anil S994a65e2007-10-21 16:41:46 -0700249 u8 pcie_type; /* PCI-E device/port type */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 u8 rom_base_reg; /* which config register controls the ROM */
Kristen Accardiffeff782005-11-02 16:24:32 -0800251 u8 pin; /* which interrupt pin this device uses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
253 struct pci_driver *driver; /* which driver has allocated this device */
254 u64 dma_mask; /* Mask of the bits of bus address this
255 device implements. Normally this is
256 0xffffffff. You only need to change
257 this if your device has broken DMA
258 or supports 64-bit transfers. */
259
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800260 struct device_dma_parameters dma_parms;
261
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 pci_power_t current_state; /* Current operating state. In ACPI-speak,
263 this is D0-D3, D0 being fully functional,
264 and D3 being off. */
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200265 int pm_cap; /* PM capability offset in the
266 configuration space */
267 unsigned int pme_support:5; /* Bitmask of states from which PME#
268 can be generated */
Rafael J. Wysockic7f48652010-02-17 23:39:08 +0100269 unsigned int pme_interrupt:1;
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200270 unsigned int d1_support:1; /* Low power state D1 is supported */
271 unsigned int d2_support:1; /* Low power state D2 is supported */
272 unsigned int no_d1d2:1; /* Only allow D0 and D3 */
Rafael J. Wysockie80bb092009-09-08 23:14:49 +0200273 unsigned int wakeup_prepared:1;
Rafael J. Wysocki1ae861e2009-12-31 12:15:54 +0100274 unsigned int d3_delay; /* D3->D0 transition time in ms */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
Shaohua Li7d715a62008-02-25 09:46:41 +0800276#ifdef CONFIG_PCIEASPM
277 struct pcie_link_state *link_state; /* ASPM link state. */
278#endif
279
linas392a1ce2005-11-16 17:10:41 -0600280 pci_channel_state_t error_state; /* current connectivity state */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 struct device dev; /* Generic device interface */
282
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 int cfg_size; /* Size of configuration space */
284
285 /*
286 * Instead of touching interrupt line and base address registers
287 * directly, use the values stored here. They might be different!
288 */
289 unsigned int irq;
290 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
291
292 /* These fields are used by common fixups */
293 unsigned int transparent:1; /* Transparent PCI bridge */
294 unsigned int multifunction:1;/* Part of multi-function device */
295 /* keep track of device state */
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -0800296 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 unsigned int is_busmaster:1; /* device is busmaster */
Kristen Accardi4602b882005-08-16 15:15:58 -0700298 unsigned int no_msi:1; /* device may not use msi */
Brian Kinge04b0ea2005-09-27 01:21:55 -0700299 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
Doug Thompsonbd8481e2006-05-08 17:06:09 -0700300 unsigned int broken_parity_status:1; /* Device generates false positive parity */
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200301 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
Shaohua Li99dc8042006-05-26 10:58:27 +0800302 unsigned int msi_enabled:1;
303 unsigned int msix_enabled:1;
Yu Zhao58c3a722008-10-14 14:02:53 +0800304 unsigned int ari_enabled:1; /* ARI forwarding */
Tejun Heo9ac78492007-01-20 16:00:26 +0900305 unsigned int is_managed:1;
Kenji Kaneshige6d3be842010-02-09 12:21:27 +0900306 unsigned int is_pcie:1; /* Obsolete. Will be removed.
307 Use pci_is_pcie() instead */
Mike Mason260d7032009-07-30 15:33:21 -0700308 unsigned int needs_freset:1; /* Dev requires fundamental reset */
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100309 unsigned int state_saved:1;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800310 unsigned int is_physfn:1;
Yu Zhaodd7cc442009-03-20 11:25:15 +0800311 unsigned int is_virtfn:1;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +0300312 unsigned int reset_fn:1;
Eric W. Biederman28760482009-09-09 14:09:24 -0700313 unsigned int is_hotplug_bridge:1;
Matt Domsch05843962009-11-02 11:51:24 -0600314 unsigned int aer_firmware_first:1;
David Millerba698ad2007-10-25 01:16:30 -0700315 pci_dev_flags_t dev_flags;
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800316 atomic_t enable_cnt; /* pci_enable_device has been called */
Kristen Accardi4602b882005-08-16 15:15:58 -0700317
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 u32 saved_config_space[16]; /* config space saved at suspend time */
Shaohua Li41017f02006-02-08 17:11:38 +0800319 struct hlist_head saved_cap_space;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
321 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
322 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
venkatesh.pallipadi@intel.com45aec1a2008-03-18 17:00:22 -0700323 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700324#ifdef CONFIG_PCI_MSI
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000325 struct list_head msi_list;
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700326#endif
Ben Hutchings94e61082008-03-05 16:52:39 +0000327 struct pci_vpd *vpd;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800328#ifdef CONFIG_PCI_IOV
Yu Zhaodd7cc442009-03-20 11:25:15 +0800329 union {
330 struct pci_sriov *sriov; /* SR-IOV capability related */
331 struct pci_dev *physfn; /* the PF this VF is associated with */
332 };
Yu Zhao302b4212009-05-18 13:51:32 +0800333 struct pci_ats *ats; /* Address Translation Service */
Yu Zhaod1b054d2009-03-20 11:25:11 +0800334#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335};
336
Michael Ellerman65891212007-04-05 17:19:08 +1000337extern struct pci_dev *alloc_pci_dev(void);
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339#define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
340#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
341#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
342
Linas Vepstasa7369f12006-12-12 16:55:59 -0600343static inline int pci_channel_offline(struct pci_dev *pdev)
344{
345 return (pdev->error_state != pci_channel_io_normal);
346}
347
Shaohua Li41017f02006-02-08 17:11:38 +0800348static inline struct pci_cap_saved_state *pci_find_saved_cap(
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800349 struct pci_dev *pci_dev, char cap)
Shaohua Li41017f02006-02-08 17:11:38 +0800350{
351 struct pci_cap_saved_state *tmp;
352 struct hlist_node *pos;
353
354 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
355 if (tmp->cap_nr == cap)
356 return tmp;
357 }
358 return NULL;
359}
360
361static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
362 struct pci_cap_saved_state *new_cap)
363{
364 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
365}
366
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700367/*
368 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
369 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
370 * buses below host bridges or subtractive decode bridges) go in the list.
371 * Use pci_bus_for_each_resource() to iterate through all the resources.
372 */
373
374/*
375 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
376 * and there's no way to program the bridge with the details of the window.
377 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
378 * decode bit set, because they are explicit and can be programmed with _SRS.
379 */
380#define PCI_SUBTRACTIVE_DECODE 0x1
381
382struct pci_bus_resource {
383 struct list_head list;
384 struct resource *res;
385 unsigned int flags;
386};
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700387
388#define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390struct pci_bus {
391 struct list_head node; /* node in list of buses */
392 struct pci_bus *parent; /* parent bus this bridge is on */
393 struct list_head children; /* list of child buses */
394 struct list_head devices; /* list of devices on this bus */
395 struct pci_dev *self; /* bridge device as seen by parent */
Alex Chiangf46753c2008-06-10 15:28:50 -0600396 struct list_head slots; /* list of slots on this bus */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700397 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
398 struct list_head resources; /* address space routed to this bus */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
400 struct pci_ops *ops; /* configuration access functions */
401 void *sysdata; /* hook for sys-specific extension */
402 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
403
404 unsigned char number; /* bus number */
405 unsigned char primary; /* number of primary bridge */
406 unsigned char secondary; /* number of secondary bridge */
407 unsigned char subordinate; /* max number of subordinate buses */
Matthew Wilcox3749c512009-12-13 08:11:32 -0500408 unsigned char max_bus_speed; /* enum pci_bus_speed */
409 unsigned char cur_bus_speed; /* enum pci_bus_speed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
411 char name[48];
412
413 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200414 pci_bus_flags_t bus_flags; /* Inherited by child busses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 struct device *bridge;
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400416 struct device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
418 struct bin_attribute *legacy_mem; /* legacy mem */
Greg Kroah-Hartmancc74d962008-03-12 21:48:03 -0700419 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420};
421
422#define pci_bus_b(n) list_entry(n, struct pci_bus, node)
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400423#define to_pci_bus(n) container_of(n, struct pci_bus, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Kenji Kaneshige79af72d2009-03-20 14:55:55 -0600425/*
426 * Returns true if the pci bus is root (behind host-pci bridge),
427 * false otherwise
428 */
429static inline bool pci_is_root_bus(struct pci_bus *pbus)
430{
431 return !(pbus->parent);
432}
433
Rafael J. Wysocki16cf0eb2009-01-05 14:50:27 +0100434#ifdef CONFIG_PCI_MSI
435static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
436{
437 return pci_dev->msi_enabled || pci_dev->msix_enabled;
438}
439#else
440static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
441#endif
442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443/*
444 * Error values that may be returned by PCI functions.
445 */
446#define PCIBIOS_SUCCESSFUL 0x00
447#define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
448#define PCIBIOS_BAD_VENDOR_ID 0x83
449#define PCIBIOS_DEVICE_NOT_FOUND 0x86
450#define PCIBIOS_BAD_REGISTER_NUMBER 0x87
451#define PCIBIOS_SET_FAILED 0x88
452#define PCIBIOS_BUFFER_TOO_SMALL 0x89
453
454/* Low-level architecture-dependent routines */
455
456struct pci_ops {
457 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
458 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
459};
460
Matthew Wilcoxb6ce0682008-02-10 09:45:28 -0500461/*
462 * ACPI needs to be able to access PCI config space before we've done a
463 * PCI bus scan and created pci_bus structures.
464 */
465extern int raw_pci_read(unsigned int domain, unsigned int bus,
466 unsigned int devfn, int reg, int len, u32 *val);
467extern int raw_pci_write(unsigned int domain, unsigned int bus,
468 unsigned int devfn, int reg, int len, u32 val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
470struct pci_bus_region {
Benjamin Herrenschmidtc40a22e2007-12-10 17:32:15 +1100471 resource_size_t start;
472 resource_size_t end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473};
474
475struct pci_dynids {
476 spinlock_t lock; /* protects list, index */
477 struct list_head list; /* for IDs added at runtime */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478};
479
linas392a1ce2005-11-16 17:10:41 -0600480/* ---------------------------------------------------------------- */
481/** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
Rolf Eike Beer579082d2007-07-10 13:35:05 +0200482 * a set of callbacks in struct pci_error_handlers, then that device driver
linas392a1ce2005-11-16 17:10:41 -0600483 * will be notified of PCI bus errors, and will be driven to recovery
484 * when an error occurs.
485 */
486
487typedef unsigned int __bitwise pci_ers_result_t;
488
489enum pci_ers_result {
490 /* no result/none/not supported in device driver */
491 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
492
493 /* Device driver can recover without slot reset */
494 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
495
496 /* Device driver wants slot to be reset. */
497 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
498
499 /* Device has completely failed, is unrecoverable */
500 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
501
502 /* Device driver is fully recovered and operational */
503 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
504};
505
506/* PCI bus error event callbacks */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800507struct pci_error_handlers {
linas392a1ce2005-11-16 17:10:41 -0600508 /* PCI bus error detected on this device */
509 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800510 enum pci_channel_state error);
linas392a1ce2005-11-16 17:10:41 -0600511
512 /* MMIO has been re-enabled, but not DMA */
513 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
514
515 /* PCI Express link has been reset */
516 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
517
518 /* PCI slot has been reset */
519 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
520
521 /* Device driver may resume normal operations */
522 void (*resume)(struct pci_dev *dev);
523};
524
525/* ---------------------------------------------------------------- */
526
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527struct module;
528struct pci_driver {
529 struct list_head node;
530 char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
532 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
533 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
534 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700535 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
536 int (*resume_early) (struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 int (*resume) (struct pci_dev *dev); /* Device woken up */
Greg KHc8958172005-04-08 14:53:31 +0900538 void (*shutdown) (struct pci_dev *dev);
linas392a1ce2005-11-16 17:10:41 -0600539 struct pci_error_handlers *err_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 struct device_driver driver;
541 struct pci_dynids dynids;
542};
543
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800544#define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
546/**
Andrew Morton9f9351b2008-03-10 11:43:34 -0700547 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100548 * @_table: device table name
549 *
550 * This macro is used to create a struct pci_device_id array (a device table)
551 * in a generic manner.
552 */
Andrew Morton9f9351b2008-03-10 11:43:34 -0700553#define DEFINE_PCI_DEVICE_TABLE(_table) \
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100554 const struct pci_device_id _table[] __devinitconst
555
556/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 * PCI_DEVICE - macro used to describe a specific pci device
558 * @vend: the 16 bit PCI Vendor ID
559 * @dev: the 16 bit PCI Device ID
560 *
561 * This macro is used to create a struct pci_device_id that matches a
562 * specific device. The subvendor and subdevice fields will be set to
563 * PCI_ANY_ID.
564 */
565#define PCI_DEVICE(vend,dev) \
566 .vendor = (vend), .device = (dev), \
567 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
568
569/**
570 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
571 * @dev_class: the class, subclass, prog-if triple for this device
572 * @dev_class_mask: the class mask for this device
573 *
574 * This macro is used to create a struct pci_device_id that matches a
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700575 * specific PCI class. The vendor, device, subvendor, and subdevice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 * fields will be set to PCI_ANY_ID.
577 */
578#define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
579 .class = (dev_class), .class_mask = (dev_class_mask), \
580 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
581 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
582
Alan Cox1597cac2006-12-04 15:14:45 -0800583/**
584 * PCI_VDEVICE - macro used to describe a specific pci device in short form
Zhao, Yuc322b282008-10-13 19:36:05 +0800585 * @vendor: the vendor name
586 * @device: the 16 bit PCI Device ID
Alan Cox1597cac2006-12-04 15:14:45 -0800587 *
588 * This macro is used to create a struct pci_device_id that matches a
589 * specific PCI device. The subvendor, and subdevice fields will be set
590 * to PCI_ANY_ID. The macro allows the next field to follow as the device
591 * private data.
592 */
593
594#define PCI_VDEVICE(vendor, device) \
595 PCI_VENDOR_ID_##vendor, (device), \
596 PCI_ANY_ID, PCI_ANY_ID, 0, 0
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598/* these external functions are only available when PCI support is enabled */
599#ifdef CONFIG_PCI
600
601extern struct bus_type pci_bus_type;
602
603/* Do NOT directly access these two variables, unless you are arch specific pci
604 * code, or pci core code. */
605extern struct list_head pci_root_buses; /* list of all known PCI buses */
Zhang, Yanmined4aaad2007-07-15 23:39:39 -0700606/* Some device drivers need know if pci is initiated */
607extern int no_pci_devices(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
609void pcibios_fixup_bus(struct pci_bus *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700610int __must_check pcibios_enable_device(struct pci_dev *, int mask);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800611char *pcibios_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
613/* Used only when drivers/pci/setup.c is used */
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100614resource_size_t pcibios_align_resource(void *, const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100615 resource_size_t,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700616 resource_size_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617void pcibios_update_irq(struct pci_dev *, int irq);
618
Benjamin Herrenschmidt2d1c8612009-12-09 17:52:13 +1100619/* Weak but can be overriden by arch */
620void pci_fixup_cardbus(struct pci_bus *);
621
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622/* Generic PCI functions used internally */
623
624extern struct pci_bus *pci_find_bus(int domain, int busnr);
akpm@linux-foundation.orgc48f1672009-02-03 15:45:26 -0800625void pci_bus_add_devices(const struct pci_bus *bus);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800626struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
627 struct pci_ops *ops, void *sysdata);
Sam Ravnborg98db6f12008-04-29 22:38:48 +0200628static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800629 void *sysdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630{
Rajesh Shahc431ada2005-04-28 00:25:45 -0700631 struct pci_bus *root_bus;
632 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
633 if (root_bus)
634 pci_bus_add_devices(root_bus);
635 return root_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800637struct pci_bus *pci_create_bus(struct device *parent, int bus,
638 struct pci_ops *ops, void *sysdata);
639struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
640 int busnr);
Matthew Wilcox3749c512009-12-13 08:11:32 -0500641void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
Alex Chiangf46753c2008-06-10 15:28:50 -0600642struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
Alex Chiang828f3762008-10-20 17:40:52 -0600643 const char *name,
644 struct hotplug_slot *hotplug);
Alex Chiangf46753c2008-06-10 15:28:50 -0600645void pci_destroy_slot(struct pci_slot *slot);
Alex Chiangd25b7c82008-10-20 17:40:47 -0600646void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647int pci_scan_slot(struct pci_bus *bus, int devfn);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800648struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
Paul Mackerrascdb9b9f2005-09-06 09:31:03 +1000649void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650unsigned int pci_scan_child_bus(struct pci_bus *bus);
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700651int __must_check pci_bus_add_device(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652void pci_read_bridge_bases(struct pci_bus *child);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800653struct resource *pci_find_parent_resource(const struct pci_dev *dev,
654 struct resource *res);
Bjorn Helgaas57c2cf72008-12-11 11:24:23 -0700655u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
Bjorn Helgaas68feac82008-12-16 21:36:55 -0700657u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
659extern void pci_dev_put(struct pci_dev *dev);
660extern void pci_remove_bus(struct pci_bus *b);
661extern void pci_remove_bus_device(struct pci_dev *dev);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700662extern void pci_stop_bus_device(struct pci_dev *dev);
Dominik Brodowskib3743fa2005-09-09 13:03:23 -0700663void pci_setup_cardbus(struct pci_bus *bus);
Matt Domsch6b4b78f2006-09-29 15:23:23 -0500664extern void pci_sort_breadthfirst(void);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +0000665#define dev_is_pci(d) ((d)->bus == &pci_bus_type)
666#define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
667#define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
669/* Generic PCI functions exported to card drivers */
670
James Bottomley388c8c12008-08-03 13:02:12 -0500671enum pci_lost_interrupt_reason {
672 PCI_LOST_IRQ_NO_INFORMATION = 0,
673 PCI_LOST_IRQ_DISABLE_MSI,
674 PCI_LOST_IRQ_DISABLE_MSIX,
675 PCI_LOST_IRQ_DISABLE_ACPI,
676};
677enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800678int pci_find_capability(struct pci_dev *dev, int cap);
679int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
680int pci_find_ext_capability(struct pci_dev *dev, int cap);
Jesse Barnescf4c43d2009-07-15 13:13:00 -0700681int pci_bus_find_ext_capability(struct pci_bus *bus, unsigned int devfn,
682 int cap);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800683int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
684int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
Alan Cox29f3eb62006-10-16 16:20:21 -0700685struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Andrew Mortond42552c2006-10-21 10:24:12 -0700687struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
688 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800689struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 unsigned int ss_vendor, unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -0700691 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800692struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
Andrew Patterson3c299dc2009-10-12 13:14:00 -0600693struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
694 unsigned int devfn);
695static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
696 unsigned int devfn)
697{
698 return pci_get_domain_bus_and_slot(0, bus, devfn);
699}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800700struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701int pci_dev_present(const struct pci_device_id *ids);
702
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800703int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
704 int where, u8 *val);
705int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
706 int where, u16 *val);
707int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
708 int where, u32 *val);
709int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
710 int where, u8 val);
711int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
712 int where, u16 val);
713int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
714 int where, u32 val);
Huang Yinga72b46c2009-04-24 10:45:17 +0800715struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
717static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
718{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800719 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720}
721static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
722{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800723 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800725static inline int pci_read_config_dword(struct pci_dev *dev, int where,
726 u32 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800728 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729}
730static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
731{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800732 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733}
734static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
735{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800736 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800738static inline int pci_write_config_dword(struct pci_dev *dev, int where,
739 u32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800741 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742}
743
Andrew Morton4a7fb632006-08-14 22:43:17 -0700744int __must_check pci_enable_device(struct pci_dev *dev);
Benjamin Herrenschmidtb7189892007-12-20 15:28:08 +1100745int __must_check pci_enable_device_io(struct pci_dev *dev);
746int __must_check pci_enable_device_mem(struct pci_dev *dev);
Tejun Heo0b62e132007-07-27 14:43:35 +0900747int __must_check pci_reenable_device(struct pci_dev *);
Tejun Heo9ac78492007-01-20 16:00:26 +0900748int __must_check pcim_enable_device(struct pci_dev *pdev);
749void pcim_pin_device(struct pci_dev *pdev);
750
Yuji Shimada296ccb02009-04-03 16:41:46 +0900751static inline int pci_is_enabled(struct pci_dev *pdev)
752{
753 return (atomic_read(&pdev->enable_cnt) > 0);
754}
755
Tejun Heo9ac78492007-01-20 16:00:26 +0900756static inline int pci_is_managed(struct pci_dev *pdev)
757{
758 return pdev->is_managed;
759}
760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761void pci_disable_device(struct pci_dev *dev);
762void pci_set_master(struct pci_dev *dev);
Ben Hutchings6a479072008-12-23 03:08:29 +0000763void pci_clear_master(struct pci_dev *dev);
Brian Kingf7bdd122007-04-06 16:39:36 -0500764int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
Tejun Heo15ea76d2009-09-22 17:34:48 +0900765int pci_set_cacheline_size(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766#define HAVE_PCI_SET_MWI
Andrew Morton4a7fb632006-08-14 22:43:17 -0700767int __must_check pci_set_mwi(struct pci_dev *dev);
Randy Dunlap694625c2007-07-09 11:55:54 -0700768int pci_try_set_mwi(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769void pci_clear_mwi(struct pci_dev *dev);
Brett M Russa04ce0f2005-08-15 15:23:41 -0400770void pci_intx(struct pci_dev *dev, int enable);
Eric W. Biedermanf5f2b132007-03-05 00:30:07 -0800771void pci_msi_off(struct pci_dev *dev);
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800772int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -0800773int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
Peter Orubad556ad42007-05-15 13:59:13 +0200774int pcix_get_max_mmrbc(struct pci_dev *dev);
775int pcix_get_mmrbc(struct pci_dev *dev);
776int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
Brice Goglin2637e5b2007-08-14 12:43:48 +0200777int pcie_get_readrq(struct pci_dev *dev);
Peter Orubad556ad42007-05-15 13:59:13 +0200778int pcie_set_readrq(struct pci_dev *dev, int rq);
Yu Zhao8c1c6992009-06-13 15:52:13 +0800779int __pci_reset_function(struct pci_dev *dev);
Sheng Yang8dd7f802008-10-21 17:38:25 +0800780int pci_reset_function(struct pci_dev *dev);
Yu Zhao14add802008-11-22 02:38:52 +0800781void pci_update_resource(struct pci_dev *dev, int resno);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700782int __must_check pci_assign_resource(struct pci_dev *dev, int i);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900783int pci_select_bars(struct pci_dev *dev, unsigned long flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
785/* ROM control related routines */
Alan Coxe416de52008-09-23 17:25:10 +0100786int pci_enable_rom(struct pci_dev *pdev);
787void pci_disable_rom(struct pci_dev *pdev);
Dave Jones144a50e2005-08-09 00:20:10 -0400788void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
Timothy S. Nelson97c44832009-01-30 06:12:47 +1100790size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
792/* Power management related routines */
793int pci_save_state(struct pci_dev *dev);
794int pci_restore_state(struct pci_dev *dev);
Rafael J. Wysocki0e5dd462009-03-26 22:51:40 +0100795int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
Linus Torvalds9c8550e2005-09-09 15:43:46 -0700796int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
797pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200798bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
Rafael J. Wysocki5a6c9b62008-08-08 00:14:24 +0200799void pci_pme_active(struct pci_dev *dev, bool enable);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100800int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
801 bool runtime, bool enable);
Rafael J. Wysocki0235c4f2008-08-18 21:38:00 +0200802int pci_wake_from_d3(struct pci_dev *dev, bool enable);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200803pci_power_t pci_target_state(struct pci_dev *dev);
Rafael J. Wysocki404cc2d2008-07-07 03:35:26 +0200804int pci_prepare_to_sleep(struct pci_dev *dev);
805int pci_back_from_sleep(struct pci_dev *dev);
Rafael J. Wysockib67ea762010-02-17 23:44:09 +0100806bool pci_dev_run_wake(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100808static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
809 bool enable)
810{
811 return __pci_enable_wake(dev, state, false, enable);
812}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
Benjamin Herrenschmidtbb209c82010-01-26 17:10:03 +0000814/* For use by arch with custom probe code */
815void set_pcie_port_type(struct pci_dev *pdev);
816void set_pcie_hotplug_bridge(struct pci_dev *pdev);
817
Kumar Galace5ccde2007-07-16 23:27:10 -0500818/* Functions for PCI Hotplug drivers to use */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800819int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
Alex Chiang3ed4fd92009-03-20 14:56:25 -0600820#ifdef CONFIG_HOTPLUG
821unsigned int pci_rescan_bus(struct pci_bus *bus);
822#endif
Kumar Galace5ccde2007-07-16 23:27:10 -0500823
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800824/* Vital product data routines */
825ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
826ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
Stephen Hemmingerdb567942008-12-18 09:17:16 -0800827int pci_vpd_truncate(struct pci_dev *dev, size_t size);
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800828
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
Andrew Mortonea741552009-02-18 10:44:29 -0800830void pci_bus_assign_resources(const struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831void pci_bus_size_bridges(struct pci_bus *bus);
832int pci_claim_resource(struct pci_dev *, int);
833void pci_assign_unassigned_resources(void);
Yinghai Lu6841ec62010-01-22 01:02:25 -0800834void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835void pdev_enable_device(struct pci_dev *);
836void pdev_sort_resources(struct pci_dev *, struct resource_list *);
Bjorn Helgaas842de402008-03-04 11:56:47 -0700837int pci_enable_resources(struct pci_dev *, int mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
839 int (*)(struct pci_dev *, u8, u8));
840#define HAVE_PCI_REQ_REGIONS 2
Andrew Morton4a7fb632006-08-14 22:43:17 -0700841int __must_check pci_request_regions(struct pci_dev *, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700842int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843void pci_release_regions(struct pci_dev *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700844int __must_check pci_request_region(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700845int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846void pci_release_region(struct pci_dev *, int);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900847int pci_request_selected_regions(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700848int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900849void pci_release_selected_regions(struct pci_dev *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
851/* drivers/pci/bus.c */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700852void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
853struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
854void pci_bus_remove_resources(struct pci_bus *bus);
855
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700856#define pci_bus_for_each_resource(bus, res, i) \
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700857 for (i = 0; \
858 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
859 i++)
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700860
Andrew Morton4a7fb632006-08-14 22:43:17 -0700861int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
862 struct resource *res, resource_size_t size,
863 resource_size_t align, resource_size_t min,
864 unsigned int type_mask,
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100865 resource_size_t (*alignf)(void *,
866 const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100867 resource_size_t,
868 resource_size_t),
Andrew Morton4a7fb632006-08-14 22:43:17 -0700869 void *alignf_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870void pci_enable_bridges(struct pci_bus *bus);
871
Laurent riffard863b18f2005-10-27 23:12:54 +0200872/* Proper probing supporting hot-pluggable devices */
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -0800873int __must_check __pci_register_driver(struct pci_driver *, struct module *,
874 const char *mod_name);
Andrew Mortonbba81162008-07-30 12:07:04 -0700875
876/*
877 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
878 */
879#define pci_register_driver(driver) \
880 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
Laurent riffard863b18f2005-10-27 23:12:54 +0200881
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800882void pci_unregister_driver(struct pci_driver *dev);
883void pci_remove_behind_bridge(struct pci_dev *dev);
884struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
Tejun Heo9dba9102009-09-03 15:26:36 +0900885int pci_add_dynid(struct pci_driver *drv,
886 unsigned int vendor, unsigned int device,
887 unsigned int subvendor, unsigned int subdevice,
888 unsigned int class, unsigned int class_mask,
889 unsigned long driver_data);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800890const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
891 struct pci_dev *dev);
892int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
893 int pass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894
Zhang, Yanmin70298c62009-06-16 13:34:38 +0800895void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
Paul Mackerrascecf4862005-08-18 14:33:01 +1000896 void *userdata);
Yinghai Lu70b9f7d2008-04-28 16:27:23 -0700897int pci_cfg_space_size_ext(struct pci_dev *dev);
Benjamin Herrenschmidtac7dc652005-12-13 18:09:16 +1100898int pci_cfg_space_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800899unsigned char pci_bus_max_busnr(struct pci_bus *bus);
Paul Mackerrascecf4862005-08-18 14:33:01 +1000900
Benjamin Herrenschmidtdeb2d2e2009-08-11 15:52:06 +1000901int pci_set_vga_state(struct pci_dev *pdev, bool decode,
902 unsigned int command_bits, bool change_bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903/* kmem_cache style wrapper around pci_alloc_consistent() */
904
FUJITA Tomonorif41b1772010-03-10 15:23:30 -0800905#include <linux/pci-dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906#include <linux/dmapool.h>
907
908#define pci_pool dma_pool
909#define pci_pool_create(name, pdev, size, align, allocation) \
910 dma_pool_create(name, &pdev->dev, size, align, allocation)
911#define pci_pool_destroy(pool) dma_pool_destroy(pool)
912#define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
913#define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
914
David S. Millere24c2d92005-06-02 12:55:50 -0700915enum pci_dma_burst_strategy {
916 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
917 strategy_parameter is N/A */
918 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
919 byte boundaries */
920 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
921 strategy_parameter byte boundaries */
922};
923
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924struct msix_entry {
Yinghai Lu16dbef42008-08-15 19:36:45 -0700925 u32 vector; /* kernel uses to write allocated vector */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 u16 entry; /* driver uses to specify entry, OS writes */
927};
928
Eric W. Biederman0366f8f2006-10-04 02:16:33 -0700929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930#ifndef CONFIG_PCI_MSI
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -0400931static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800932{
933 return -1;
934}
935
Yinghai Lud52877c2008-04-23 14:58:09 -0700936static inline void pci_msi_shutdown(struct pci_dev *dev)
937{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800938static inline void pci_disable_msi(struct pci_dev *dev)
939{ }
940
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +0100941static inline int pci_msix_table_size(struct pci_dev *dev)
942{
943 return 0;
944}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800945static inline int pci_enable_msix(struct pci_dev *dev,
946 struct msix_entry *entries, int nvec)
947{
948 return -1;
949}
950
Yinghai Lud52877c2008-04-23 14:58:09 -0700951static inline void pci_msix_shutdown(struct pci_dev *dev)
952{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800953static inline void pci_disable_msix(struct pci_dev *dev)
954{ }
955
956static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
957{ }
958
959static inline void pci_restore_msi_state(struct pci_dev *dev)
960{ }
Andrew Patterson07ae95f2008-11-10 15:31:05 -0700961static inline int pci_msi_enabled(void)
962{
963 return 0;
964}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965#else
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -0400966extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -0700967extern void pci_msi_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968extern void pci_disable_msi(struct pci_dev *dev);
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +0100969extern int pci_msix_table_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800970extern int pci_enable_msix(struct pci_dev *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 struct msix_entry *entries, int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -0700972extern void pci_msix_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973extern void pci_disable_msix(struct pci_dev *dev);
974extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
Linas Vepstas94688cf2007-11-07 15:43:59 -0600975extern void pci_restore_msi_state(struct pci_dev *dev);
Andrew Patterson07ae95f2008-11-10 15:31:05 -0700976extern int pci_msi_enabled(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977#endif
978
Andrew Patterson3e1b1602008-11-10 15:30:55 -0700979#ifndef CONFIG_PCIEASPM
980static inline int pcie_aspm_enabled(void)
981{
982 return 0;
983}
984#else
985extern int pcie_aspm_enabled(void);
986#endif
987
Andrew Patterson43c16402009-04-22 16:52:09 -0600988#ifndef CONFIG_PCIE_ECRC
989static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
990{
991 return;
992}
993static inline void pcie_ecrc_get_policy(char *str) {};
994#else
995extern void pcie_set_ecrc_checking(struct pci_dev *dev);
996extern void pcie_ecrc_get_policy(char *str);
997#endif
998
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -0400999#define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
1000
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001001#ifdef CONFIG_HT_IRQ
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001002/* The functions a driver should call */
1003int ht_create_irq(struct pci_dev *dev, int idx);
1004void ht_destroy_irq(unsigned int irq);
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001005#endif /* CONFIG_HT_IRQ */
1006
Brian Kinge04b0ea2005-09-27 01:21:55 -07001007extern void pci_block_user_cfg_access(struct pci_dev *dev);
1008extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
1009
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001010/*
1011 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1012 * a PCI domain is defined to be a set of PCI busses which share
1013 * configuration space.
1014 */
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001015#ifdef CONFIG_PCI_DOMAINS
1016extern int pci_domains_supported;
1017#else
1018enum { pci_domains_supported = 0 };
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001019static inline int pci_domain_nr(struct pci_bus *bus)
1020{
1021 return 0;
1022}
1023
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001024static inline int pci_proc_domain(struct pci_bus *bus)
1025{
1026 return 0;
1027}
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001028#endif /* CONFIG_PCI_DOMAINS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Mike Travis95a8b6e2010-02-02 14:38:13 -08001030/* some architectures require additional setup to direct VGA traffic */
1031typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1032 unsigned int command_bits, bool change_bridge);
1033extern void pci_register_set_vga_state(arch_set_vga_state_t func);
1034
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001035#else /* CONFIG_PCI is not enabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036
1037/*
1038 * If the system does not have PCI, clearly these return errors. Define
1039 * these as simple inline functions to avoid hair in drivers.
1040 */
1041
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001042#define _PCI_NOP(o, s, t) \
1043 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1044 int where, t val) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001046
1047#define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1048 _PCI_NOP(o, word, u16 x) \
1049 _PCI_NOP(o, dword, u32 x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050_PCI_NOP_ALL(read, *)
1051_PCI_NOP_ALL(write,)
1052
Andrew Mortond42552c2006-10-21 10:24:12 -07001053static inline struct pci_dev *pci_get_device(unsigned int vendor,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001054 unsigned int device,
1055 struct pci_dev *from)
1056{
1057 return NULL;
1058}
Andrew Mortond42552c2006-10-21 10:24:12 -07001059
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001060static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1061 unsigned int device,
1062 unsigned int ss_vendor,
1063 unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -07001064 struct pci_dev *from)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001065{
1066 return NULL;
1067}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001069static inline struct pci_dev *pci_get_class(unsigned int class,
1070 struct pci_dev *from)
1071{
1072 return NULL;
1073}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074
1075#define pci_dev_present(ids) (0)
Zhang, Yanmined4aaad2007-07-15 23:39:39 -07001076#define no_pci_devices() (1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077#define pci_dev_put(dev) do { } while (0)
1078
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001079static inline void pci_set_master(struct pci_dev *dev)
1080{ }
1081
1082static inline int pci_enable_device(struct pci_dev *dev)
1083{
1084 return -EIO;
1085}
1086
1087static inline void pci_disable_device(struct pci_dev *dev)
1088{ }
1089
1090static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1091{
1092 return -EIO;
1093}
1094
Randy Dunlap80be0382008-06-30 11:35:53 -07001095static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1096{
1097 return -EIO;
1098}
1099
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -08001100static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1101 unsigned int size)
1102{
1103 return -EIO;
1104}
1105
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -08001106static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1107 unsigned long mask)
1108{
1109 return -EIO;
1110}
1111
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001112static inline int pci_assign_resource(struct pci_dev *dev, int i)
1113{
1114 return -EBUSY;
1115}
1116
1117static inline int __pci_register_driver(struct pci_driver *drv,
1118 struct module *owner)
1119{
1120 return 0;
1121}
1122
1123static inline int pci_register_driver(struct pci_driver *drv)
1124{
1125 return 0;
1126}
1127
1128static inline void pci_unregister_driver(struct pci_driver *drv)
1129{ }
1130
1131static inline int pci_find_capability(struct pci_dev *dev, int cap)
1132{
1133 return 0;
1134}
1135
1136static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1137 int cap)
1138{
1139 return 0;
1140}
1141
1142static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1143{
1144 return 0;
1145}
1146
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147/* Power management related routines */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001148static inline int pci_save_state(struct pci_dev *dev)
1149{
1150 return 0;
1151}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001153static inline int pci_restore_state(struct pci_dev *dev)
1154{
1155 return 0;
1156}
1157
1158static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1159{
1160 return 0;
1161}
1162
1163static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1164 pm_message_t state)
1165{
1166 return PCI_D0;
1167}
1168
1169static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1170 int enable)
1171{
1172 return 0;
1173}
1174
1175static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1176{
1177 return -EIO;
1178}
1179
1180static inline void pci_release_regions(struct pci_dev *dev)
1181{ }
Sergei Shtylyov0da0ead2007-04-01 21:13:58 +04001182
Kumar Galaa46e8122005-07-29 12:16:27 -07001183#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1184
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001185static inline void pci_block_user_cfg_access(struct pci_dev *dev)
1186{ }
1187
1188static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
1189{ }
Brian Kinge04b0ea2005-09-27 01:21:55 -07001190
Randy Dunlapd80d0212007-07-01 12:06:37 -07001191static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1192{ return NULL; }
1193
1194static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1195 unsigned int devfn)
1196{ return NULL; }
1197
1198static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1199 unsigned int devfn)
1200{ return NULL; }
1201
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001202#define dev_is_pci(d) (false)
1203#define dev_is_pf(d) (false)
1204#define dev_num_vf(d) (0)
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001205#endif /* CONFIG_PCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001207/* Include architecture-dependent settings and functions */
1208
1209#include <asm/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
Yinghai Lu1f82de12009-04-23 20:48:32 -07001211#ifndef PCIBIOS_MAX_MEM_32
1212#define PCIBIOS_MAX_MEM_32 (-1)
1213#endif
1214
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215/* these helpers provide future and backwards compatibility
1216 * for accessing popular PCI BAR info */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001217#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1218#define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1219#define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220#define pci_resource_len(dev,bar) \
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001221 ((pci_resource_start((dev), (bar)) == 0 && \
1222 pci_resource_end((dev), (bar)) == \
1223 pci_resource_start((dev), (bar))) ? 0 : \
1224 \
1225 (pci_resource_end((dev), (bar)) - \
1226 pci_resource_start((dev), (bar)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
1228/* Similar to the helpers above, these manipulate per-pci_dev
1229 * driver-specific data. They are really just a wrapper around
1230 * the generic device structure functions of these calls.
1231 */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001232static inline void *pci_get_drvdata(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233{
1234 return dev_get_drvdata(&pdev->dev);
1235}
1236
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001237static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238{
1239 dev_set_drvdata(&pdev->dev, data);
1240}
1241
1242/* If you want to know what to call your pci_dev, ask this function.
1243 * Again, it's a wrapper around the generic device.
1244 */
Alexey Zaytsev2fc90f62009-06-24 16:22:30 +04001245static inline const char *pci_name(const struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246{
Greg KHc6c4f072008-07-03 09:49:39 -07001247 return dev_name(&pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248}
1249
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001250
1251/* Some archs don't want to expose struct resource to userland as-is
1252 * in sysfs and /proc
1253 */
1254#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1255static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001256 const struct resource *rsrc, resource_size_t *start,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -07001257 resource_size_t *end)
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001258{
1259 *start = rsrc->start;
1260 *end = rsrc->end;
1261}
1262#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1263
1264
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265/*
1266 * The world is not perfect and supplies us with broken PCI devices.
1267 * For at least a part of these bugs we need a work-around, so both
1268 * generic (drivers/pci/quirks.c) and per-architecture code can define
1269 * fixup hooks to be called for particular buggy devices.
1270 */
1271
1272struct pci_fixup {
1273 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1274 void (*hook)(struct pci_dev *dev);
1275};
1276
1277enum pci_fixup_pass {
1278 pci_fixup_early, /* Before probing BARs */
1279 pci_fixup_header, /* After reading configuration header */
1280 pci_fixup_final, /* Final phase of device fixups */
1281 pci_fixup_enable, /* pci_enable_device() time */
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001282 pci_fixup_resume, /* pci_device_resume() */
1283 pci_fixup_suspend, /* pci_device_suspend */
1284 pci_fixup_resume_early, /* pci_device_resume_early() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285};
1286
1287/* Anonymous variables would be nice... */
1288#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
Adrian Bunk3ff6eec2008-01-24 22:16:20 +01001289 static const struct pci_fixup __pci_fixup_##name __used \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 __attribute__((__section__(#section))) = { vendor, device, hook };
1291#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1292 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1293 vendor##device##hook, vendor, device, hook)
1294#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1295 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1296 vendor##device##hook, vendor, device, hook)
1297#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1298 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1299 vendor##device##hook, vendor, device, hook)
1300#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1301 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1302 vendor##device##hook, vendor, device, hook)
Alan Cox1597cac2006-12-04 15:14:45 -08001303#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1304 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1305 resume##vendor##device##hook, vendor, device, hook)
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001306#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1307 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1308 resume_early##vendor##device##hook, vendor, device, hook)
1309#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1310 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1311 suspend##vendor##device##hook, vendor, device, hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001313#ifdef CONFIG_PCI_QUIRKS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001315#else
1316static inline void pci_fixup_device(enum pci_fixup_pass pass,
1317 struct pci_dev *dev) {}
1318#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001320void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
Al Viro5ea81762007-02-11 15:41:31 +00001321void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001322void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
Al Viro5ea81762007-02-11 15:41:31 +00001323int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
Tejun Heo916fbfb2008-03-12 15:26:34 +09001324int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1325 const char *name);
Tejun Heoec04b072007-03-09 19:45:58 +09001326void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
Al Viro5ea81762007-02-11 15:41:31 +00001327
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328extern int pci_pci_problems;
Alan Cox236561e2006-09-30 23:27:03 -07001329#define PCIPCI_FAIL 1 /* No PCI PCI DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330#define PCIPCI_TRITON 2
1331#define PCIPCI_NATOMA 4
1332#define PCIPCI_VIAETBF 8
1333#define PCIPCI_VSFX 16
Alan Cox236561e2006-09-30 23:27:03 -07001334#define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1335#define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001337extern unsigned long pci_cardbus_io_size;
1338extern unsigned long pci_cardbus_mem_size;
David Howells491424c2009-12-14 14:13:44 +00001339extern u8 __devinitdata pci_dfl_cache_line_size;
Jesse Barnesac1aa472009-10-26 13:20:44 -07001340extern u8 pci_cache_line_size;
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001341
Eric W. Biederman28760482009-09-09 14:09:24 -07001342extern unsigned long pci_hotplug_io_size;
1343extern unsigned long pci_hotplug_mem_size;
1344
Adrian Bunk19792a02008-05-05 21:25:47 +03001345int pcibios_add_platform_entries(struct pci_dev *dev);
1346void pcibios_disable_device(struct pci_dev *dev);
1347int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1348 enum pcie_reset_state state);
Michael Ellerman575e3342007-05-08 12:03:07 +10001349
Robert Hancock7752d5c2008-02-15 01:27:20 -08001350#ifdef CONFIG_PCI_MMCONFIG
Yinghai Lubb63b422008-02-28 23:56:50 -08001351extern void __init pci_mmcfg_early_init(void);
Robert Hancock7752d5c2008-02-15 01:27:20 -08001352extern void __init pci_mmcfg_late_init(void);
1353#else
Yinghai Lubb63b422008-02-28 23:56:50 -08001354static inline void pci_mmcfg_early_init(void) { }
Robert Hancock7752d5c2008-02-15 01:27:20 -08001355static inline void pci_mmcfg_late_init(void) { }
1356#endif
1357
Andrew Patterson0ef5f8f2008-11-10 15:30:50 -07001358int pci_ext_cfg_avail(struct pci_dev *dev);
1359
Andrew Morton1684f5d2008-12-01 14:30:30 -08001360void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
Arjan van de Venaa42d7c2008-09-28 16:36:11 -07001361
Yu Zhaodd7cc442009-03-20 11:25:15 +08001362#ifdef CONFIG_PCI_IOV
1363extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1364extern void pci_disable_sriov(struct pci_dev *dev);
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001365extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001366extern int pci_num_vf(struct pci_dev *dev);
Yu Zhaodd7cc442009-03-20 11:25:15 +08001367#else
1368static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1369{
1370 return -ENODEV;
1371}
1372static inline void pci_disable_sriov(struct pci_dev *dev)
1373{
1374}
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001375static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
1376{
1377 return IRQ_NONE;
1378}
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001379static inline int pci_num_vf(struct pci_dev *dev)
1380{
1381 return 0;
1382}
Yu Zhaodd7cc442009-03-20 11:25:15 +08001383#endif
1384
Kenji Kaneshigec825bc92009-06-16 11:01:25 +09001385#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1386extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
1387extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1388#endif
1389
Kenji Kaneshiged7b7e602009-11-11 14:29:54 +09001390/**
1391 * pci_pcie_cap - get the saved PCIe capability offset
1392 * @dev: PCI device
1393 *
1394 * PCIe capability offset is calculated at PCI device initialization
1395 * time and saved in the data structure. This function returns saved
1396 * PCIe capability offset. Using this instead of pci_find_capability()
1397 * reduces unnecessary search in the PCI configuration space. If you
1398 * need to calculate PCIe capability offset from raw device for some
1399 * reasons, please use pci_find_capability() instead.
1400 */
1401static inline int pci_pcie_cap(struct pci_dev *dev)
1402{
1403 return dev->pcie_cap;
1404}
1405
Kenji Kaneshige7eb776c2009-11-11 14:35:22 +09001406/**
1407 * pci_is_pcie - check if the PCI device is PCI Express capable
1408 * @dev: PCI device
1409 *
1410 * Retrun true if the PCI device is PCI Express capable, false otherwise.
1411 */
1412static inline bool pci_is_pcie(struct pci_dev *dev)
1413{
1414 return !!pci_pcie_cap(dev);
1415}
1416
Chris Wright5d990b62009-12-04 12:15:21 -08001417void pci_request_acs(void);
1418
Matt Carlsona2ce7662010-02-26 14:04:39 +00001419
Matt Carlson7ad506f2010-02-26 14:04:40 +00001420#define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1421#define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT)
1422
1423/* Large Resource Data Type Tag Item Names */
1424#define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1425#define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1426#define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1427
1428#define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1429#define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1430#define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1431
1432/* Small Resource Data Type Tag Item Names */
1433#define PCI_VPD_STIN_END 0x78 /* End */
1434
1435#define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1436
1437#define PCI_VPD_SRDT_TIN_MASK 0x78
1438#define PCI_VPD_SRDT_LEN_MASK 0x07
1439
1440#define PCI_VPD_LRDT_TAG_SIZE 3
1441#define PCI_VPD_SRDT_TAG_SIZE 1
Matt Carlsona2ce7662010-02-26 14:04:39 +00001442
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001443#define PCI_VPD_INFO_FLD_HDR_SIZE 3
1444
Matt Carlson4067a852010-02-26 14:04:43 +00001445#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1446#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1447#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
1448
Matt Carlsona2ce7662010-02-26 14:04:39 +00001449/**
1450 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1451 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1452 *
1453 * Returns the extracted Large Resource Data Type length.
1454 */
1455static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1456{
1457 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1458}
1459
Matt Carlson7ad506f2010-02-26 14:04:40 +00001460/**
1461 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1462 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1463 *
1464 * Returns the extracted Small Resource Data Type length.
1465 */
1466static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1467{
1468 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1469}
1470
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001471/**
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001472 * pci_vpd_info_field_size - Extracts the information field length
1473 * @lrdt: Pointer to the beginning of an information field header
1474 *
1475 * Returns the extracted information field length.
1476 */
1477static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1478{
1479 return info_field[2];
1480}
1481
1482/**
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001483 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1484 * @buf: Pointer to buffered vpd data
1485 * @off: The offset into the buffer at which to begin the search
1486 * @len: The length of the vpd buffer
1487 * @rdt: The Resource Data Type to search for
1488 *
1489 * Returns the index where the Resource Data Type was found or
1490 * -ENOENT otherwise.
1491 */
1492int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1493
Matt Carlson4067a852010-02-26 14:04:43 +00001494/**
1495 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1496 * @buf: Pointer to buffered vpd data
1497 * @off: The offset into the buffer at which to begin the search
1498 * @len: The length of the buffer area, relative to off, in which to search
1499 * @kw: The keyword to search for
1500 *
1501 * Returns the index where the information field keyword was found or
1502 * -ENOENT otherwise.
1503 */
1504int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1505 unsigned int len, const char *kw);
1506
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507#endif /* __KERNEL__ */
1508#endif /* LINUX_PCI_H */