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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 */
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 Wilcox45b4cdd52009-12-13 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
Alex Williamson24a4742f2011-05-10 10:02:11 -0600217struct pci_cap_saved_data {
218 char cap_nr;
219 unsigned int size;
220 u32 data[0];
221};
222
Shaohua Li41017f02006-02-08 17:11:38 +0800223struct pci_cap_saved_state {
224 struct hlist_node next;
Alex Williamson24a4742f2011-05-10 10:02:11 -0600225 struct pci_cap_saved_data cap;
Shaohua Li41017f02006-02-08 17:11:38 +0800226};
227
Shaohua Li7d715a62008-02-25 09:46:41 +0800228struct pcie_link_state;
Jesse Barnesee69439c2008-04-28 12:30:35 -0700229struct pci_vpd;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800230struct pci_sriov;
Yu Zhao302b4212009-05-18 13:51:32 +0800231struct pci_ats;
Jesse Barnesee69439c2008-04-28 12:30:35 -0700232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233/*
234 * The pci_dev structure is used to describe PCI devices.
235 */
236struct pci_dev {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 struct list_head bus_list; /* node in per-bus list */
238 struct pci_bus *bus; /* bus this device is on */
239 struct pci_bus *subordinate; /* bus this device bridges to */
240
241 void *sysdata; /* hook for sys-specific extension */
242 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
Alex Chiangf46753c2008-06-10 15:28:50 -0600243 struct pci_slot *slot; /* Physical slot this device is in */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
245 unsigned int devfn; /* encoded device & function index */
246 unsigned short vendor;
247 unsigned short device;
248 unsigned short subsystem_vendor;
249 unsigned short subsystem_device;
250 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
Auke Kokb8a3a522007-06-08 15:46:30 -0700251 u8 revision; /* PCI revision, low byte of class word */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
Kenji Kaneshige0efea002009-11-05 12:05:11 +0900253 u8 pcie_cap; /* PCI-E capability offset */
Jon Masonb03e7492011-07-20 15:20:54 -0500254 u8 pcie_type:4; /* PCI-E device/port type */
255 u8 pcie_mpss:3; /* PCI-E Max Payload Size Supported */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 u8 rom_base_reg; /* which config register controls the ROM */
Kristen Accardiffeff782005-11-02 16:24:32 -0800257 u8 pin; /* which interrupt pin this device uses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
259 struct pci_driver *driver; /* which driver has allocated this device */
260 u64 dma_mask; /* Mask of the bits of bus address this
261 device implements. Normally this is
262 0xffffffff. You only need to change
263 this if your device has broken DMA
264 or supports 64-bit transfers. */
265
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800266 struct device_dma_parameters dma_parms;
267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 pci_power_t current_state; /* Current operating state. In ACPI-speak,
269 this is D0-D3, D0 being fully functional,
270 and D3 being off. */
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200271 int pm_cap; /* PM capability offset in the
272 configuration space */
273 unsigned int pme_support:5; /* Bitmask of states from which PME#
274 can be generated */
Rafael J. Wysockic7f48652010-02-17 23:39:08 +0100275 unsigned int pme_interrupt:1;
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200276 unsigned int d1_support:1; /* Low power state D1 is supported */
277 unsigned int d2_support:1; /* Low power state D2 is supported */
278 unsigned int no_d1d2:1; /* Only allow D0 and D3 */
Jacob Pan253d2e52010-07-16 10:19:22 -0700279 unsigned int mmio_always_on:1; /* disallow turning off io/mem
280 decoding during bar sizing */
Rafael J. Wysockie80bb092009-09-08 23:14:49 +0200281 unsigned int wakeup_prepared:1;
Rafael J. Wysocki1ae861e2009-12-31 12:15:54 +0100282 unsigned int d3_delay; /* D3->D0 transition time in ms */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
Shaohua Li7d715a62008-02-25 09:46:41 +0800284#ifdef CONFIG_PCIEASPM
285 struct pcie_link_state *link_state; /* ASPM link state. */
286#endif
287
linas392a1ce2005-11-16 17:10:41 -0600288 pci_channel_state_t error_state; /* current connectivity state */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 struct device dev; /* Generic device interface */
290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 int cfg_size; /* Size of configuration space */
292
293 /*
294 * Instead of touching interrupt line and base address registers
295 * directly, use the values stored here. They might be different!
296 */
297 unsigned int irq;
298 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
Bjorn Helgaas58c84ed2010-07-15 09:41:42 -0600299 resource_size_t fw_addr[DEVICE_COUNT_RESOURCE]; /* FW-assigned addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
301 /* These fields are used by common fixups */
302 unsigned int transparent:1; /* Transparent PCI bridge */
303 unsigned int multifunction:1;/* Part of multi-function device */
304 /* keep track of device state */
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -0800305 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 unsigned int is_busmaster:1; /* device is busmaster */
Kristen Accardi4602b882005-08-16 15:15:58 -0700307 unsigned int no_msi:1; /* device may not use msi */
Brian Kinge04b0ea2005-09-27 01:21:55 -0700308 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
Doug Thompsonbd8481e2006-05-08 17:06:09 -0700309 unsigned int broken_parity_status:1; /* Device generates false positive parity */
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200310 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
Shaohua Li99dc8042006-05-26 10:58:27 +0800311 unsigned int msi_enabled:1;
312 unsigned int msix_enabled:1;
Yu Zhao58c3a722008-10-14 14:02:53 +0800313 unsigned int ari_enabled:1; /* ARI forwarding */
Tejun Heo9ac78492007-01-20 16:00:26 +0900314 unsigned int is_managed:1;
Kenji Kaneshige6d3be842010-02-09 12:21:27 +0900315 unsigned int is_pcie:1; /* Obsolete. Will be removed.
316 Use pci_is_pcie() instead */
Mike Mason260d7032009-07-30 15:33:21 -0700317 unsigned int needs_freset:1; /* Dev requires fundamental reset */
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100318 unsigned int state_saved:1;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800319 unsigned int is_physfn:1;
Yu Zhaodd7cc442009-03-20 11:25:15 +0800320 unsigned int is_virtfn:1;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +0300321 unsigned int reset_fn:1;
Eric W. Biederman28760482009-09-09 14:09:24 -0700322 unsigned int is_hotplug_bridge:1;
Huang Yingaffb72c2010-05-18 14:35:16 +0800323 unsigned int __aer_firmware_first_valid:1;
324 unsigned int __aer_firmware_first:1;
David Millerba698ad2007-10-25 01:16:30 -0700325 pci_dev_flags_t dev_flags;
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800326 atomic_t enable_cnt; /* pci_enable_device has been called */
Kristen Accardi4602b882005-08-16 15:15:58 -0700327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 u32 saved_config_space[16]; /* config space saved at suspend time */
Shaohua Li41017f02006-02-08 17:11:38 +0800329 struct hlist_head saved_cap_space;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
331 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
332 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700333 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700334#ifdef CONFIG_PCI_MSI
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000335 struct list_head msi_list;
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700336#endif
Ben Hutchings94e61082008-03-05 16:52:39 +0000337 struct pci_vpd *vpd;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800338#ifdef CONFIG_PCI_IOV
Yu Zhaodd7cc442009-03-20 11:25:15 +0800339 union {
340 struct pci_sriov *sriov; /* SR-IOV capability related */
341 struct pci_dev *physfn; /* the PF this VF is associated with */
342 };
Yu Zhao302b4212009-05-18 13:51:32 +0800343 struct pci_ats *ats; /* Address Translation Service */
Yu Zhaod1b054d2009-03-20 11:25:11 +0800344#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345};
346
Yinghaidda56542010-04-09 01:07:55 +0100347static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
348{
349#ifdef CONFIG_PCI_IOV
350 if (dev->is_virtfn)
351 dev = dev->physfn;
352#endif
353
354 return dev;
355}
356
Michael Ellerman65891212007-04-05 17:19:08 +1000357extern struct pci_dev *alloc_pci_dev(void);
358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359#define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
360#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
361#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
362
Linas Vepstasa7369f12006-12-12 16:55:59 -0600363static inline int pci_channel_offline(struct pci_dev *pdev)
364{
365 return (pdev->error_state != pci_channel_io_normal);
366}
367
Shaohua Li41017f02006-02-08 17:11:38 +0800368static inline struct pci_cap_saved_state *pci_find_saved_cap(
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800369 struct pci_dev *pci_dev, char cap)
Shaohua Li41017f02006-02-08 17:11:38 +0800370{
371 struct pci_cap_saved_state *tmp;
372 struct hlist_node *pos;
373
374 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
Alex Williamson24a4742f2011-05-10 10:02:11 -0600375 if (tmp->cap.cap_nr == cap)
Shaohua Li41017f02006-02-08 17:11:38 +0800376 return tmp;
377 }
378 return NULL;
379}
380
381static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
382 struct pci_cap_saved_state *new_cap)
383{
384 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
385}
386
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700387/*
388 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
389 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
390 * buses below host bridges or subtractive decode bridges) go in the list.
391 * Use pci_bus_for_each_resource() to iterate through all the resources.
392 */
393
394/*
395 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
396 * and there's no way to program the bridge with the details of the window.
397 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
398 * decode bit set, because they are explicit and can be programmed with _SRS.
399 */
400#define PCI_SUBTRACTIVE_DECODE 0x1
401
402struct pci_bus_resource {
403 struct list_head list;
404 struct resource *res;
405 unsigned int flags;
406};
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700407
408#define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410struct pci_bus {
411 struct list_head node; /* node in list of buses */
412 struct pci_bus *parent; /* parent bus this bridge is on */
413 struct list_head children; /* list of child buses */
414 struct list_head devices; /* list of devices on this bus */
415 struct pci_dev *self; /* bridge device as seen by parent */
Alex Chiangf46753c2008-06-10 15:28:50 -0600416 struct list_head slots; /* list of slots on this bus */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700417 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
418 struct list_head resources; /* address space routed to this bus */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
420 struct pci_ops *ops; /* configuration access functions */
421 void *sysdata; /* hook for sys-specific extension */
422 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
423
424 unsigned char number; /* bus number */
425 unsigned char primary; /* number of primary bridge */
426 unsigned char secondary; /* number of secondary bridge */
427 unsigned char subordinate; /* max number of subordinate buses */
Matthew Wilcox3749c512009-12-13 08:11:32 -0500428 unsigned char max_bus_speed; /* enum pci_bus_speed */
429 unsigned char cur_bus_speed; /* enum pci_bus_speed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431 char name[48];
432
433 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200434 pci_bus_flags_t bus_flags; /* Inherited by child busses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 struct device *bridge;
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400436 struct device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
438 struct bin_attribute *legacy_mem; /* legacy mem */
Greg Kroah-Hartmancc74d962008-03-12 21:48:03 -0700439 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440};
441
442#define pci_bus_b(n) list_entry(n, struct pci_bus, node)
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400443#define to_pci_bus(n) container_of(n, struct pci_bus, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Kenji Kaneshige79af72d2009-03-20 14:55:55 -0600445/*
446 * Returns true if the pci bus is root (behind host-pci bridge),
447 * false otherwise
448 */
449static inline bool pci_is_root_bus(struct pci_bus *pbus)
450{
451 return !(pbus->parent);
452}
453
Rafael J. Wysocki16cf0eb2009-01-05 14:50:27 +0100454#ifdef CONFIG_PCI_MSI
455static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
456{
457 return pci_dev->msi_enabled || pci_dev->msix_enabled;
458}
459#else
460static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
461#endif
462
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463/*
464 * Error values that may be returned by PCI functions.
465 */
466#define PCIBIOS_SUCCESSFUL 0x00
467#define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
468#define PCIBIOS_BAD_VENDOR_ID 0x83
469#define PCIBIOS_DEVICE_NOT_FOUND 0x86
470#define PCIBIOS_BAD_REGISTER_NUMBER 0x87
471#define PCIBIOS_SET_FAILED 0x88
472#define PCIBIOS_BUFFER_TOO_SMALL 0x89
473
474/* Low-level architecture-dependent routines */
475
476struct pci_ops {
477 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
478 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
479};
480
Matthew Wilcoxb6ce0682008-02-10 09:45:28 -0500481/*
482 * ACPI needs to be able to access PCI config space before we've done a
483 * PCI bus scan and created pci_bus structures.
484 */
485extern int raw_pci_read(unsigned int domain, unsigned int bus,
486 unsigned int devfn, int reg, int len, u32 *val);
487extern int raw_pci_write(unsigned int domain, unsigned int bus,
488 unsigned int devfn, int reg, int len, u32 val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
490struct pci_bus_region {
Benjamin Herrenschmidtc40a22e2007-12-10 17:32:15 +1100491 resource_size_t start;
492 resource_size_t end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493};
494
495struct pci_dynids {
496 spinlock_t lock; /* protects list, index */
497 struct list_head list; /* for IDs added at runtime */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498};
499
linas392a1ce2005-11-16 17:10:41 -0600500/* ---------------------------------------------------------------- */
501/** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
Rolf Eike Beer579082d2007-07-10 13:35:05 +0200502 * a set of callbacks in struct pci_error_handlers, then that device driver
linas392a1ce2005-11-16 17:10:41 -0600503 * will be notified of PCI bus errors, and will be driven to recovery
504 * when an error occurs.
505 */
506
507typedef unsigned int __bitwise pci_ers_result_t;
508
509enum pci_ers_result {
510 /* no result/none/not supported in device driver */
511 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
512
513 /* Device driver can recover without slot reset */
514 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
515
516 /* Device driver wants slot to be reset. */
517 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
518
519 /* Device has completely failed, is unrecoverable */
520 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
521
522 /* Device driver is fully recovered and operational */
523 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
524};
525
526/* PCI bus error event callbacks */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800527struct pci_error_handlers {
linas392a1ce2005-11-16 17:10:41 -0600528 /* PCI bus error detected on this device */
529 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800530 enum pci_channel_state error);
linas392a1ce2005-11-16 17:10:41 -0600531
532 /* MMIO has been re-enabled, but not DMA */
533 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
534
535 /* PCI Express link has been reset */
536 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
537
538 /* PCI slot has been reset */
539 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
540
541 /* Device driver may resume normal operations */
542 void (*resume)(struct pci_dev *dev);
543};
544
545/* ---------------------------------------------------------------- */
546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547struct module;
548struct pci_driver {
549 struct list_head node;
Stephen Hemminger42b21932010-09-02 14:28:51 -0700550 const char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
552 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
553 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
554 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700555 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
556 int (*resume_early) (struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 int (*resume) (struct pci_dev *dev); /* Device woken up */
Greg KHc8958172005-04-08 14:53:31 +0900558 void (*shutdown) (struct pci_dev *dev);
linas392a1ce2005-11-16 17:10:41 -0600559 struct pci_error_handlers *err_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 struct device_driver driver;
561 struct pci_dynids dynids;
562};
563
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800564#define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
566/**
Andrew Morton9f9351b2008-03-10 11:43:34 -0700567 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100568 * @_table: device table name
569 *
570 * This macro is used to create a struct pci_device_id array (a device table)
571 * in a generic manner.
572 */
Andrew Morton9f9351b2008-03-10 11:43:34 -0700573#define DEFINE_PCI_DEVICE_TABLE(_table) \
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100574 const struct pci_device_id _table[] __devinitconst
575
576/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 * PCI_DEVICE - macro used to describe a specific pci device
578 * @vend: the 16 bit PCI Vendor ID
579 * @dev: the 16 bit PCI Device ID
580 *
581 * This macro is used to create a struct pci_device_id that matches a
582 * specific device. The subvendor and subdevice fields will be set to
583 * PCI_ANY_ID.
584 */
585#define PCI_DEVICE(vend,dev) \
586 .vendor = (vend), .device = (dev), \
587 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
588
589/**
590 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
591 * @dev_class: the class, subclass, prog-if triple for this device
592 * @dev_class_mask: the class mask for this device
593 *
594 * This macro is used to create a struct pci_device_id that matches a
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700595 * specific PCI class. The vendor, device, subvendor, and subdevice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 * fields will be set to PCI_ANY_ID.
597 */
598#define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
599 .class = (dev_class), .class_mask = (dev_class_mask), \
600 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
601 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
602
Alan Cox1597cac2006-12-04 15:14:45 -0800603/**
604 * PCI_VDEVICE - macro used to describe a specific pci device in short form
Zhao, Yuc322b282008-10-13 19:36:05 +0800605 * @vendor: the vendor name
606 * @device: the 16 bit PCI Device ID
Alan Cox1597cac2006-12-04 15:14:45 -0800607 *
608 * This macro is used to create a struct pci_device_id that matches a
609 * specific PCI device. The subvendor, and subdevice fields will be set
610 * to PCI_ANY_ID. The macro allows the next field to follow as the device
611 * private data.
612 */
613
614#define PCI_VDEVICE(vendor, device) \
615 PCI_VENDOR_ID_##vendor, (device), \
616 PCI_ANY_ID, PCI_ANY_ID, 0, 0
617
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618/* these external functions are only available when PCI support is enabled */
619#ifdef CONFIG_PCI
620
Jon Masonb03e7492011-07-20 15:20:54 -0500621extern void pcie_bus_configure_settings(struct pci_bus *bus, u8 smpss);
622
623enum pcie_bus_config_types {
Jon Mason5f39e672011-10-03 09:50:20 -0500624 PCIE_BUS_TUNE_OFF,
Jon Masonb03e7492011-07-20 15:20:54 -0500625 PCIE_BUS_SAFE,
Jon Mason5f39e672011-10-03 09:50:20 -0500626 PCIE_BUS_PERFORMANCE,
Jon Masonb03e7492011-07-20 15:20:54 -0500627 PCIE_BUS_PEER2PEER,
628};
629
630extern enum pcie_bus_config_types pcie_bus_config;
631
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632extern struct bus_type pci_bus_type;
633
634/* Do NOT directly access these two variables, unless you are arch specific pci
635 * code, or pci core code. */
636extern struct list_head pci_root_buses; /* list of all known PCI buses */
Zhang, Yanmined4aaad2007-07-15 23:39:39 -0700637/* Some device drivers need know if pci is initiated */
638extern int no_pci_devices(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
640void pcibios_fixup_bus(struct pci_bus *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700641int __must_check pcibios_enable_device(struct pci_dev *, int mask);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800642char *pcibios_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643
644/* Used only when drivers/pci/setup.c is used */
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100645resource_size_t pcibios_align_resource(void *, const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100646 resource_size_t,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700647 resource_size_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648void pcibios_update_irq(struct pci_dev *, int irq);
649
Benjamin Herrenschmidt2d1c8612009-12-09 17:52:13 +1100650/* Weak but can be overriden by arch */
651void pci_fixup_cardbus(struct pci_bus *);
652
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653/* Generic PCI functions used internally */
654
Mauro Carvalho Chehabd1fd4fb2009-07-10 18:39:53 -0300655void pcibios_scan_specific_bus(int busn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656extern struct pci_bus *pci_find_bus(int domain, int busnr);
akpm@linux-foundation.orgc48f1672009-02-03 15:45:26 -0800657void pci_bus_add_devices(const struct pci_bus *bus);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800658struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
659 struct pci_ops *ops, void *sysdata);
Sam Ravnborg98db6f12008-04-29 22:38:48 +0200660static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800661 void *sysdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662{
Rajesh Shahc431ada2005-04-28 00:25:45 -0700663 struct pci_bus *root_bus;
664 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
665 if (root_bus)
666 pci_bus_add_devices(root_bus);
667 return root_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800669struct pci_bus *pci_create_bus(struct device *parent, int bus,
670 struct pci_ops *ops, void *sysdata);
671struct 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);
794void pci_set_master(struct pci_dev *dev);
Ben Hutchings6a479072008-12-23 03:08:29 +0000795void pci_clear_master(struct pci_dev *dev);
Brian Kingf7bdd122007-04-06 16:39:36 -0500796int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
Tejun Heo15ea76d2009-09-22 17:34:48 +0900797int pci_set_cacheline_size(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798#define HAVE_PCI_SET_MWI
Andrew Morton4a7fb632006-08-14 22:43:17 -0700799int __must_check pci_set_mwi(struct pci_dev *dev);
Randy Dunlap694625c2007-07-09 11:55:54 -0700800int pci_try_set_mwi(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801void pci_clear_mwi(struct pci_dev *dev);
Brett M Russa04ce0f2005-08-15 15:23:41 -0400802void pci_intx(struct pci_dev *dev, int enable);
Eric W. Biedermanf5f2b132007-03-05 00:30:07 -0800803void pci_msi_off(struct pci_dev *dev);
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800804int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -0800805int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
Peter Orubad556ad42007-05-15 13:59:13 +0200806int pcix_get_max_mmrbc(struct pci_dev *dev);
807int pcix_get_mmrbc(struct pci_dev *dev);
808int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
Brice Goglin2637e5b2007-08-14 12:43:48 +0200809int pcie_get_readrq(struct pci_dev *dev);
Peter Orubad556ad42007-05-15 13:59:13 +0200810int pcie_set_readrq(struct pci_dev *dev, int rq);
Jon Masonb03e7492011-07-20 15:20:54 -0500811int pcie_get_mps(struct pci_dev *dev);
812int pcie_set_mps(struct pci_dev *dev, int mps);
Yu Zhao8c1c6992009-06-13 15:52:13 +0800813int __pci_reset_function(struct pci_dev *dev);
Sheng Yang8dd7f802008-10-21 17:38:25 +0800814int pci_reset_function(struct pci_dev *dev);
Yu Zhao14add802008-11-22 02:38:52 +0800815void pci_update_resource(struct pci_dev *dev, int resno);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700816int __must_check pci_assign_resource(struct pci_dev *dev, int i);
Ram Pai2bbc6942011-07-25 13:08:39 -0700817int __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 +0900818int pci_select_bars(struct pci_dev *dev, unsigned long flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
820/* ROM control related routines */
Alan Coxe416de52008-09-23 17:25:10 +0100821int pci_enable_rom(struct pci_dev *pdev);
822void pci_disable_rom(struct pci_dev *pdev);
Dave Jones144a50e2005-08-09 00:20:10 -0400823void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
Timothy S. Nelson97c44832009-01-30 06:12:47 +1100825size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
827/* Power management related routines */
828int pci_save_state(struct pci_dev *dev);
Jon Mason1d3c16a2010-11-30 17:43:26 -0600829void pci_restore_state(struct pci_dev *dev);
Alex Williamsonffbdd3f2011-05-10 10:02:27 -0600830struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
831int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state);
832int pci_load_and_free_saved_state(struct pci_dev *dev,
833 struct pci_saved_state **state);
Rafael J. Wysocki0e5dd462009-03-26 22:51:40 +0100834int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
Linus Torvalds9c8550e2005-09-09 15:43:46 -0700835int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
836pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200837bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
Rafael J. Wysocki5a6c9b62008-08-08 00:14:24 +0200838void pci_pme_active(struct pci_dev *dev, bool enable);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100839int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
840 bool runtime, bool enable);
Rafael J. Wysocki0235c4f2008-08-18 21:38:00 +0200841int pci_wake_from_d3(struct pci_dev *dev, bool enable);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200842pci_power_t pci_target_state(struct pci_dev *dev);
Rafael J. Wysocki404cc2d2008-07-07 03:35:26 +0200843int pci_prepare_to_sleep(struct pci_dev *dev);
844int pci_back_from_sleep(struct pci_dev *dev);
Rafael J. Wysockib67ea762010-02-17 23:44:09 +0100845bool pci_dev_run_wake(struct pci_dev *dev);
Matthew Garrettbf4d2902010-10-04 14:22:26 -0400846bool pci_check_pme_status(struct pci_dev *dev);
Matthew Garrettbf4d2902010-10-04 14:22:26 -0400847void pci_pme_wakeup_bus(struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100849static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
850 bool enable)
851{
852 return __pci_enable_wake(dev, state, false, enable);
853}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
Jesse Barnesb48d4422010-10-19 13:07:57 -0700855#define PCI_EXP_IDO_REQUEST (1<<0)
856#define PCI_EXP_IDO_COMPLETION (1<<1)
857void pci_enable_ido(struct pci_dev *dev, unsigned long type);
858void pci_disable_ido(struct pci_dev *dev, unsigned long type);
859
Jesse Barnes48a92a82011-01-10 12:46:36 -0800860enum pci_obff_signal_type {
Myron Stowe688398b2011-07-07 15:00:36 -0600861 PCI_EXP_OBFF_SIGNAL_L0 = 0,
862 PCI_EXP_OBFF_SIGNAL_ALWAYS = 1,
Jesse Barnes48a92a82011-01-10 12:46:36 -0800863};
864int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type);
865void pci_disable_obff(struct pci_dev *dev);
866
Jesse Barnes51c2e0a2011-01-14 08:53:04 -0800867bool pci_ltr_supported(struct pci_dev *dev);
868int pci_enable_ltr(struct pci_dev *dev);
869void pci_disable_ltr(struct pci_dev *dev);
870int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns);
871
Benjamin Herrenschmidtbb209c82010-01-26 17:10:03 +0000872/* For use by arch with custom probe code */
873void set_pcie_port_type(struct pci_dev *pdev);
874void set_pcie_hotplug_bridge(struct pci_dev *pdev);
875
Kumar Galace5ccde2007-07-16 23:27:10 -0500876/* Functions for PCI Hotplug drivers to use */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800877int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
Alex Chiang3ed4fd92009-03-20 14:56:25 -0600878#ifdef CONFIG_HOTPLUG
879unsigned int pci_rescan_bus(struct pci_bus *bus);
880#endif
Kumar Galace5ccde2007-07-16 23:27:10 -0500881
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800882/* Vital product data routines */
883ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
884ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
Stephen Hemmingerdb567942008-12-18 09:17:16 -0800885int pci_vpd_truncate(struct pci_dev *dev, size_t size);
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800886
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
Andrew Mortonea741552009-02-18 10:44:29 -0800888void pci_bus_assign_resources(const struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889void pci_bus_size_bridges(struct pci_bus *bus);
890int pci_claim_resource(struct pci_dev *, int);
891void pci_assign_unassigned_resources(void);
Yinghai Lu6841ec62010-01-22 01:02:25 -0800892void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893void pdev_enable_device(struct pci_dev *);
894void pdev_sort_resources(struct pci_dev *, struct resource_list *);
Bjorn Helgaas842de402008-03-04 11:56:47 -0700895int pci_enable_resources(struct pci_dev *, int mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
Ralf Baechled5341942011-06-10 15:30:21 +0100897 int (*)(const struct pci_dev *, u8, u8));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898#define HAVE_PCI_REQ_REGIONS 2
Andrew Morton4a7fb632006-08-14 22:43:17 -0700899int __must_check pci_request_regions(struct pci_dev *, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700900int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901void pci_release_regions(struct pci_dev *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700902int __must_check pci_request_region(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700903int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904void pci_release_region(struct pci_dev *, int);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900905int pci_request_selected_regions(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700906int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900907void pci_release_selected_regions(struct pci_dev *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908
909/* drivers/pci/bus.c */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700910void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
911struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
912void pci_bus_remove_resources(struct pci_bus *bus);
913
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700914#define pci_bus_for_each_resource(bus, res, i) \
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700915 for (i = 0; \
916 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
917 i++)
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700918
Andrew Morton4a7fb632006-08-14 22:43:17 -0700919int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
920 struct resource *res, resource_size_t size,
921 resource_size_t align, resource_size_t min,
922 unsigned int type_mask,
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100923 resource_size_t (*alignf)(void *,
924 const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100925 resource_size_t,
926 resource_size_t),
Andrew Morton4a7fb632006-08-14 22:43:17 -0700927 void *alignf_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928void pci_enable_bridges(struct pci_bus *bus);
929
Laurent riffard863b18f2005-10-27 23:12:54 +0200930/* Proper probing supporting hot-pluggable devices */
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -0800931int __must_check __pci_register_driver(struct pci_driver *, struct module *,
932 const char *mod_name);
Andrew Mortonbba81162008-07-30 12:07:04 -0700933
934/*
935 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
936 */
937#define pci_register_driver(driver) \
938 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
Laurent riffard863b18f2005-10-27 23:12:54 +0200939
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800940void pci_unregister_driver(struct pci_driver *dev);
941void pci_remove_behind_bridge(struct pci_dev *dev);
942struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
Tejun Heo9dba9102009-09-03 15:26:36 +0900943int pci_add_dynid(struct pci_driver *drv,
944 unsigned int vendor, unsigned int device,
945 unsigned int subvendor, unsigned int subdevice,
946 unsigned int class, unsigned int class_mask,
947 unsigned long driver_data);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800948const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
949 struct pci_dev *dev);
950int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
951 int pass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
Zhang, Yanmin70298c62009-06-16 13:34:38 +0800953void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
Paul Mackerrascecf4862005-08-18 14:33:01 +1000954 void *userdata);
Yinghai Lu70b9f7d2008-04-28 16:27:23 -0700955int pci_cfg_space_size_ext(struct pci_dev *dev);
Benjamin Herrenschmidtac7dc652005-12-13 18:09:16 +1100956int pci_cfg_space_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800957unsigned char pci_bus_max_busnr(struct pci_bus *bus);
Benjamin Herrenschmidte2444272011-09-11 14:08:38 -0300958void pci_setup_bridge(struct pci_bus *bus);
Paul Mackerrascecf4862005-08-18 14:33:01 +1000959
Dave Airlie3448a192010-06-01 15:32:24 +1000960#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
961#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
962
Benjamin Herrenschmidtdeb2d2e2009-08-11 15:52:06 +1000963int pci_set_vga_state(struct pci_dev *pdev, bool decode,
Dave Airlie3448a192010-06-01 15:32:24 +1000964 unsigned int command_bits, u32 flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965/* kmem_cache style wrapper around pci_alloc_consistent() */
966
FUJITA Tomonorif41b1772010-03-10 15:23:30 -0800967#include <linux/pci-dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968#include <linux/dmapool.h>
969
970#define pci_pool dma_pool
971#define pci_pool_create(name, pdev, size, align, allocation) \
972 dma_pool_create(name, &pdev->dev, size, align, allocation)
973#define pci_pool_destroy(pool) dma_pool_destroy(pool)
974#define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
975#define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
976
David S. Millere24c2d92005-06-02 12:55:50 -0700977enum pci_dma_burst_strategy {
978 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
979 strategy_parameter is N/A */
980 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
981 byte boundaries */
982 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
983 strategy_parameter byte boundaries */
984};
985
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986struct msix_entry {
Yinghai Lu16dbef42008-08-15 19:36:45 -0700987 u32 vector; /* kernel uses to write allocated vector */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 u16 entry; /* driver uses to specify entry, OS writes */
989};
990
Eric W. Biederman0366f8f2006-10-04 02:16:33 -0700991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992#ifndef CONFIG_PCI_MSI
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -0400993static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800994{
995 return -1;
996}
997
Yinghai Lud52877c2008-04-23 14:58:09 -0700998static inline void pci_msi_shutdown(struct pci_dev *dev)
999{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001000static inline void pci_disable_msi(struct pci_dev *dev)
1001{ }
1002
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +01001003static inline int pci_msix_table_size(struct pci_dev *dev)
1004{
1005 return 0;
1006}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001007static inline int pci_enable_msix(struct pci_dev *dev,
1008 struct msix_entry *entries, int nvec)
1009{
1010 return -1;
1011}
1012
Yinghai Lud52877c2008-04-23 14:58:09 -07001013static inline void pci_msix_shutdown(struct pci_dev *dev)
1014{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001015static inline void pci_disable_msix(struct pci_dev *dev)
1016{ }
1017
1018static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
1019{ }
1020
1021static inline void pci_restore_msi_state(struct pci_dev *dev)
1022{ }
Andrew Patterson07ae95f2008-11-10 15:31:05 -07001023static inline int pci_msi_enabled(void)
1024{
1025 return 0;
1026}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027#else
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001028extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -07001029extern void pci_msi_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030extern void pci_disable_msi(struct pci_dev *dev);
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +01001031extern int pci_msix_table_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001032extern int pci_enable_msix(struct pci_dev *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 struct msix_entry *entries, int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -07001034extern void pci_msix_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035extern void pci_disable_msix(struct pci_dev *dev);
1036extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
Linas Vepstas94688cf2007-11-07 15:43:59 -06001037extern void pci_restore_msi_state(struct pci_dev *dev);
Andrew Patterson07ae95f2008-11-10 15:31:05 -07001038extern int pci_msi_enabled(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039#endif
1040
Markus Trippelsdorfab0724f2011-01-15 00:07:22 +01001041#ifdef CONFIG_PCIEPORTBUS
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001042extern bool pcie_ports_disabled;
1043extern bool pcie_ports_auto;
Markus Trippelsdorfab0724f2011-01-15 00:07:22 +01001044#else
1045#define pcie_ports_disabled true
1046#define pcie_ports_auto false
1047#endif
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001048
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001049#ifndef CONFIG_PCIEASPM
Rafael J. Wysocki8b8bae92011-03-05 13:21:51 +01001050static inline int pcie_aspm_enabled(void) { return 0; }
1051static inline bool pcie_aspm_support_enabled(void) { return false; }
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001052#else
1053extern int pcie_aspm_enabled(void);
Rafael J. Wysocki8b8bae92011-03-05 13:21:51 +01001054extern bool pcie_aspm_support_enabled(void);
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001055#endif
1056
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001057#ifdef CONFIG_PCIEAER
1058void pci_no_aer(void);
1059bool pci_aer_available(void);
1060#else
1061static inline void pci_no_aer(void) { }
1062static inline bool pci_aer_available(void) { return false; }
1063#endif
1064
Andrew Patterson43c16402009-04-22 16:52:09 -06001065#ifndef CONFIG_PCIE_ECRC
1066static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
1067{
1068 return;
1069}
1070static inline void pcie_ecrc_get_policy(char *str) {};
1071#else
1072extern void pcie_set_ecrc_checking(struct pci_dev *dev);
1073extern void pcie_ecrc_get_policy(char *str);
1074#endif
1075
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001076#define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
1077
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001078#ifdef CONFIG_HT_IRQ
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001079/* The functions a driver should call */
1080int ht_create_irq(struct pci_dev *dev, int idx);
1081void ht_destroy_irq(unsigned int irq);
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001082#endif /* CONFIG_HT_IRQ */
1083
Brian Kinge04b0ea2005-09-27 01:21:55 -07001084extern void pci_block_user_cfg_access(struct pci_dev *dev);
1085extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
1086
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001087/*
1088 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1089 * a PCI domain is defined to be a set of PCI busses which share
1090 * configuration space.
1091 */
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001092#ifdef CONFIG_PCI_DOMAINS
1093extern int pci_domains_supported;
1094#else
1095enum { pci_domains_supported = 0 };
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001096static inline int pci_domain_nr(struct pci_bus *bus)
1097{
1098 return 0;
1099}
1100
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001101static inline int pci_proc_domain(struct pci_bus *bus)
1102{
1103 return 0;
1104}
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001105#endif /* CONFIG_PCI_DOMAINS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106
Mike Travis95a8b6e2010-02-02 14:38:13 -08001107/* some architectures require additional setup to direct VGA traffic */
1108typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
Dave Airlie3448a192010-06-01 15:32:24 +10001109 unsigned int command_bits, u32 flags);
Mike Travis95a8b6e2010-02-02 14:38:13 -08001110extern void pci_register_set_vga_state(arch_set_vga_state_t func);
1111
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001112#else /* CONFIG_PCI is not enabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
1114/*
1115 * If the system does not have PCI, clearly these return errors. Define
1116 * these as simple inline functions to avoid hair in drivers.
1117 */
1118
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001119#define _PCI_NOP(o, s, t) \
1120 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1121 int where, t val) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001123
1124#define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1125 _PCI_NOP(o, word, u16 x) \
1126 _PCI_NOP(o, dword, u32 x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127_PCI_NOP_ALL(read, *)
1128_PCI_NOP_ALL(write,)
1129
Andrew Mortond42552c2006-10-21 10:24:12 -07001130static inline struct pci_dev *pci_get_device(unsigned int vendor,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001131 unsigned int device,
1132 struct pci_dev *from)
1133{
1134 return NULL;
1135}
Andrew Mortond42552c2006-10-21 10:24:12 -07001136
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001137static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1138 unsigned int device,
1139 unsigned int ss_vendor,
1140 unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -07001141 struct pci_dev *from)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001142{
1143 return NULL;
1144}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001146static inline struct pci_dev *pci_get_class(unsigned int class,
1147 struct pci_dev *from)
1148{
1149 return NULL;
1150}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
1152#define pci_dev_present(ids) (0)
Zhang, Yanmined4aaad2007-07-15 23:39:39 -07001153#define no_pci_devices() (1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154#define pci_dev_put(dev) do { } while (0)
1155
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001156static inline void pci_set_master(struct pci_dev *dev)
1157{ }
1158
1159static inline int pci_enable_device(struct pci_dev *dev)
1160{
1161 return -EIO;
1162}
1163
1164static inline void pci_disable_device(struct pci_dev *dev)
1165{ }
1166
1167static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1168{
1169 return -EIO;
1170}
1171
Randy Dunlap80be0382008-06-30 11:35:53 -07001172static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1173{
1174 return -EIO;
1175}
1176
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -08001177static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1178 unsigned int size)
1179{
1180 return -EIO;
1181}
1182
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -08001183static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1184 unsigned long mask)
1185{
1186 return -EIO;
1187}
1188
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001189static inline int pci_assign_resource(struct pci_dev *dev, int i)
1190{
1191 return -EBUSY;
1192}
1193
1194static inline int __pci_register_driver(struct pci_driver *drv,
1195 struct module *owner)
1196{
1197 return 0;
1198}
1199
1200static inline int pci_register_driver(struct pci_driver *drv)
1201{
1202 return 0;
1203}
1204
1205static inline void pci_unregister_driver(struct pci_driver *drv)
1206{ }
1207
1208static inline int pci_find_capability(struct pci_dev *dev, int cap)
1209{
1210 return 0;
1211}
1212
1213static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1214 int cap)
1215{
1216 return 0;
1217}
1218
1219static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1220{
1221 return 0;
1222}
1223
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224/* Power management related routines */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001225static inline int pci_save_state(struct pci_dev *dev)
1226{
1227 return 0;
1228}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
Jon Mason1d3c16a2010-11-30 17:43:26 -06001230static inline void pci_restore_state(struct pci_dev *dev)
1231{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001232
1233static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1234{
1235 return 0;
1236}
1237
Randy Dunlap34492482011-02-14 12:27:50 -08001238static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1239{
1240 return 0;
1241}
1242
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001243static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1244 pm_message_t state)
1245{
1246 return PCI_D0;
1247}
1248
1249static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1250 int enable)
1251{
1252 return 0;
1253}
1254
Jesse Barnesb48d4422010-10-19 13:07:57 -07001255static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type)
1256{
1257}
1258
1259static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type)
1260{
1261}
1262
Jesse Barnes48a92a82011-01-10 12:46:36 -08001263static inline int pci_enable_obff(struct pci_dev *dev, unsigned long type)
1264{
1265 return 0;
1266}
1267
1268static inline void pci_disable_obff(struct pci_dev *dev)
1269{
1270}
1271
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001272static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1273{
1274 return -EIO;
1275}
1276
1277static inline void pci_release_regions(struct pci_dev *dev)
1278{ }
Sergei Shtylyov0da0ead2007-04-01 21:13:58 +04001279
Kumar Galaa46e8122005-07-29 12:16:27 -07001280#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1281
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001282static inline void pci_block_user_cfg_access(struct pci_dev *dev)
1283{ }
1284
1285static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
1286{ }
Brian Kinge04b0ea2005-09-27 01:21:55 -07001287
Randy Dunlapd80d0212007-07-01 12:06:37 -07001288static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1289{ return NULL; }
1290
1291static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1292 unsigned int devfn)
1293{ return NULL; }
1294
1295static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1296 unsigned int devfn)
1297{ return NULL; }
1298
Dave Airlie92298e62010-08-13 10:22:17 +10001299static inline int pci_domain_nr(struct pci_bus *bus)
1300{ return 0; }
1301
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001302#define dev_is_pci(d) (false)
1303#define dev_is_pf(d) (false)
1304#define dev_num_vf(d) (0)
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001305#endif /* CONFIG_PCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001307/* Include architecture-dependent settings and functions */
1308
1309#include <asm/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310
Yinghai Lu1f82de12009-04-23 20:48:32 -07001311#ifndef PCIBIOS_MAX_MEM_32
1312#define PCIBIOS_MAX_MEM_32 (-1)
1313#endif
1314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315/* these helpers provide future and backwards compatibility
1316 * for accessing popular PCI BAR info */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001317#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1318#define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1319#define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320#define pci_resource_len(dev,bar) \
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001321 ((pci_resource_start((dev), (bar)) == 0 && \
1322 pci_resource_end((dev), (bar)) == \
1323 pci_resource_start((dev), (bar))) ? 0 : \
1324 \
1325 (pci_resource_end((dev), (bar)) - \
1326 pci_resource_start((dev), (bar)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327
1328/* Similar to the helpers above, these manipulate per-pci_dev
1329 * driver-specific data. They are really just a wrapper around
1330 * the generic device structure functions of these calls.
1331 */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001332static inline void *pci_get_drvdata(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333{
1334 return dev_get_drvdata(&pdev->dev);
1335}
1336
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001337static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338{
1339 dev_set_drvdata(&pdev->dev, data);
1340}
1341
1342/* If you want to know what to call your pci_dev, ask this function.
1343 * Again, it's a wrapper around the generic device.
1344 */
Alexey Zaytsev2fc90f62009-06-24 16:22:30 +04001345static inline const char *pci_name(const struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346{
Greg KHc6c4f072008-07-03 09:49:39 -07001347 return dev_name(&pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348}
1349
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001350
1351/* Some archs don't want to expose struct resource to userland as-is
1352 * in sysfs and /proc
1353 */
1354#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1355static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001356 const struct resource *rsrc, resource_size_t *start,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -07001357 resource_size_t *end)
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001358{
1359 *start = rsrc->start;
1360 *end = rsrc->end;
1361}
1362#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1363
1364
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365/*
1366 * The world is not perfect and supplies us with broken PCI devices.
1367 * For at least a part of these bugs we need a work-around, so both
1368 * generic (drivers/pci/quirks.c) and per-architecture code can define
1369 * fixup hooks to be called for particular buggy devices.
1370 */
1371
1372struct pci_fixup {
1373 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1374 void (*hook)(struct pci_dev *dev);
1375};
1376
1377enum pci_fixup_pass {
1378 pci_fixup_early, /* Before probing BARs */
1379 pci_fixup_header, /* After reading configuration header */
1380 pci_fixup_final, /* Final phase of device fixups */
1381 pci_fixup_enable, /* pci_enable_device() time */
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001382 pci_fixup_resume, /* pci_device_resume() */
1383 pci_fixup_suspend, /* pci_device_suspend */
1384 pci_fixup_resume_early, /* pci_device_resume_early() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385};
1386
1387/* Anonymous variables would be nice... */
1388#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
Adrian Bunk3ff6eec2008-01-24 22:16:20 +01001389 static const struct pci_fixup __pci_fixup_##name __used \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 __attribute__((__section__(#section))) = { vendor, device, hook };
1391#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1392 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1393 vendor##device##hook, vendor, device, hook)
1394#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1395 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1396 vendor##device##hook, vendor, device, hook)
1397#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1398 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1399 vendor##device##hook, vendor, device, hook)
1400#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1401 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1402 vendor##device##hook, vendor, device, hook)
Alan Cox1597cac2006-12-04 15:14:45 -08001403#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1404 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1405 resume##vendor##device##hook, vendor, device, hook)
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001406#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1407 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1408 resume_early##vendor##device##hook, vendor, device, hook)
1409#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1410 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1411 suspend##vendor##device##hook, vendor, device, hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001413#ifdef CONFIG_PCI_QUIRKS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001415#else
1416static inline void pci_fixup_device(enum pci_fixup_pass pass,
1417 struct pci_dev *dev) {}
1418#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001420void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
Al Viro5ea81762007-02-11 15:41:31 +00001421void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001422void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
Al Viro5ea81762007-02-11 15:41:31 +00001423int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
Tejun Heo916fbfb2008-03-12 15:26:34 +09001424int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1425 const char *name);
Tejun Heoec04b072007-03-09 19:45:58 +09001426void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
Al Viro5ea81762007-02-11 15:41:31 +00001427
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428extern int pci_pci_problems;
Alan Cox236561e2006-09-30 23:27:03 -07001429#define PCIPCI_FAIL 1 /* No PCI PCI DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430#define PCIPCI_TRITON 2
1431#define PCIPCI_NATOMA 4
1432#define PCIPCI_VIAETBF 8
1433#define PCIPCI_VSFX 16
Alan Cox236561e2006-09-30 23:27:03 -07001434#define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1435#define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001437extern unsigned long pci_cardbus_io_size;
1438extern unsigned long pci_cardbus_mem_size;
David Howells491424c2009-12-14 14:13:44 +00001439extern u8 __devinitdata pci_dfl_cache_line_size;
Jesse Barnesac1aa472009-10-26 13:20:44 -07001440extern u8 pci_cache_line_size;
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001441
Eric W. Biederman28760482009-09-09 14:09:24 -07001442extern unsigned long pci_hotplug_io_size;
1443extern unsigned long pci_hotplug_mem_size;
1444
Adrian Bunk19792a02008-05-05 21:25:47 +03001445int pcibios_add_platform_entries(struct pci_dev *dev);
1446void pcibios_disable_device(struct pci_dev *dev);
1447int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1448 enum pcie_reset_state state);
Michael Ellerman575e3342007-05-08 12:03:07 +10001449
Robert Hancock7752d5c2008-02-15 01:27:20 -08001450#ifdef CONFIG_PCI_MMCONFIG
Yinghai Lubb63b422008-02-28 23:56:50 -08001451extern void __init pci_mmcfg_early_init(void);
Robert Hancock7752d5c2008-02-15 01:27:20 -08001452extern void __init pci_mmcfg_late_init(void);
1453#else
Yinghai Lubb63b422008-02-28 23:56:50 -08001454static inline void pci_mmcfg_early_init(void) { }
Robert Hancock7752d5c2008-02-15 01:27:20 -08001455static inline void pci_mmcfg_late_init(void) { }
1456#endif
1457
Andrew Patterson0ef5f8f2008-11-10 15:30:50 -07001458int pci_ext_cfg_avail(struct pci_dev *dev);
1459
Andrew Morton1684f5d2008-12-01 14:30:30 -08001460void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
Arjan van de Venaa42d7c2008-09-28 16:36:11 -07001461
Yu Zhaodd7cc442009-03-20 11:25:15 +08001462#ifdef CONFIG_PCI_IOV
1463extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1464extern void pci_disable_sriov(struct pci_dev *dev);
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001465extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001466extern int pci_num_vf(struct pci_dev *dev);
Yu Zhaodd7cc442009-03-20 11:25:15 +08001467#else
1468static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1469{
1470 return -ENODEV;
1471}
1472static inline void pci_disable_sriov(struct pci_dev *dev)
1473{
1474}
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001475static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
1476{
1477 return IRQ_NONE;
1478}
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001479static inline int pci_num_vf(struct pci_dev *dev)
1480{
1481 return 0;
1482}
Yu Zhaodd7cc442009-03-20 11:25:15 +08001483#endif
1484
Kenji Kaneshigec825bc92009-06-16 11:01:25 +09001485#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1486extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
1487extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1488#endif
1489
Kenji Kaneshiged7b7e602009-11-11 14:29:54 +09001490/**
1491 * pci_pcie_cap - get the saved PCIe capability offset
1492 * @dev: PCI device
1493 *
1494 * PCIe capability offset is calculated at PCI device initialization
1495 * time and saved in the data structure. This function returns saved
1496 * PCIe capability offset. Using this instead of pci_find_capability()
1497 * reduces unnecessary search in the PCI configuration space. If you
1498 * need to calculate PCIe capability offset from raw device for some
1499 * reasons, please use pci_find_capability() instead.
1500 */
1501static inline int pci_pcie_cap(struct pci_dev *dev)
1502{
1503 return dev->pcie_cap;
1504}
1505
Kenji Kaneshige7eb776c2009-11-11 14:35:22 +09001506/**
1507 * pci_is_pcie - check if the PCI device is PCI Express capable
1508 * @dev: PCI device
1509 *
1510 * Retrun true if the PCI device is PCI Express capable, false otherwise.
1511 */
1512static inline bool pci_is_pcie(struct pci_dev *dev)
1513{
1514 return !!pci_pcie_cap(dev);
1515}
1516
Chris Wright5d990b62009-12-04 12:15:21 -08001517void pci_request_acs(void);
1518
Matt Carlsona2ce7662010-02-26 14:04:39 +00001519
Matt Carlson7ad506f2010-02-26 14:04:40 +00001520#define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1521#define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT)
1522
1523/* Large Resource Data Type Tag Item Names */
1524#define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1525#define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1526#define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1527
1528#define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1529#define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1530#define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1531
1532/* Small Resource Data Type Tag Item Names */
1533#define PCI_VPD_STIN_END 0x78 /* End */
1534
1535#define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1536
1537#define PCI_VPD_SRDT_TIN_MASK 0x78
1538#define PCI_VPD_SRDT_LEN_MASK 0x07
1539
1540#define PCI_VPD_LRDT_TAG_SIZE 3
1541#define PCI_VPD_SRDT_TAG_SIZE 1
Matt Carlsona2ce7662010-02-26 14:04:39 +00001542
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001543#define PCI_VPD_INFO_FLD_HDR_SIZE 3
1544
Matt Carlson4067a852010-02-26 14:04:43 +00001545#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1546#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1547#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
Matt Carlsond4894f32011-03-09 16:58:21 +00001548#define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
Matt Carlson4067a852010-02-26 14:04:43 +00001549
Matt Carlsona2ce7662010-02-26 14:04:39 +00001550/**
1551 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1552 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1553 *
1554 * Returns the extracted Large Resource Data Type length.
1555 */
1556static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1557{
1558 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1559}
1560
Matt Carlson7ad506f2010-02-26 14:04:40 +00001561/**
1562 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1563 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1564 *
1565 * Returns the extracted Small Resource Data Type length.
1566 */
1567static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1568{
1569 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1570}
1571
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001572/**
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001573 * pci_vpd_info_field_size - Extracts the information field length
1574 * @lrdt: Pointer to the beginning of an information field header
1575 *
1576 * Returns the extracted information field length.
1577 */
1578static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1579{
1580 return info_field[2];
1581}
1582
1583/**
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001584 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1585 * @buf: Pointer to buffered vpd data
1586 * @off: The offset into the buffer at which to begin the search
1587 * @len: The length of the vpd buffer
1588 * @rdt: The Resource Data Type to search for
1589 *
1590 * Returns the index where the Resource Data Type was found or
1591 * -ENOENT otherwise.
1592 */
1593int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1594
Matt Carlson4067a852010-02-26 14:04:43 +00001595/**
1596 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1597 * @buf: Pointer to buffered vpd data
1598 * @off: The offset into the buffer at which to begin the search
1599 * @len: The length of the buffer area, relative to off, in which to search
1600 * @kw: The keyword to search for
1601 *
1602 * Returns the index where the information field keyword was found or
1603 * -ENOENT otherwise.
1604 */
1605int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1606 unsigned int len, const char *kw);
1607
Benjamin Herrenschmidt98d9f30c82011-04-11 11:37:07 +10001608/* PCI <-> OF binding helpers */
1609#ifdef CONFIG_OF
1610struct device_node;
1611extern void pci_set_of_node(struct pci_dev *dev);
1612extern void pci_release_of_node(struct pci_dev *dev);
1613extern void pci_set_bus_of_node(struct pci_bus *bus);
1614extern void pci_release_bus_of_node(struct pci_bus *bus);
1615
1616/* Arch may override this (weak) */
1617extern struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus);
1618
Benjamin Herrenschmidt64099d92011-04-07 13:09:47 +10001619static inline struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
1620{
1621 return pdev ? pdev->dev.of_node : NULL;
1622}
1623
Benjamin Herrenschmidtef3b4f82011-04-11 11:34:33 +10001624static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
1625{
1626 return bus ? bus->dev.of_node : NULL;
1627}
1628
Benjamin Herrenschmidt98d9f30c82011-04-11 11:37:07 +10001629#else /* CONFIG_OF */
1630static inline void pci_set_of_node(struct pci_dev *dev) { }
1631static inline void pci_release_of_node(struct pci_dev *dev) { }
1632static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
1633static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
1634#endif /* CONFIG_OF */
1635
Ohad Ben-Cohen166e9272011-06-10 21:42:27 +03001636/**
1637 * pci_find_upstream_pcie_bridge - find upstream PCIe-to-PCI bridge of a device
1638 * @pdev: the PCI device
1639 *
1640 * if the device is PCIE, return NULL
1641 * if the device isn't connected to a PCIe bridge (that is its parent is a
1642 * legacy PCI bridge and the bridge is directly connected to bus 0), return its
1643 * parent
1644 */
1645struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
1646
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647#endif /* __KERNEL__ */
1648#endif /* LINUX_PCI_H */