blob: 7454408c41b6fb57cf6f29913cb5be32374b377f [file] [log] [blame]
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 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
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 Barnesee69439c2008-04-28 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 Barnesee69439c2008-04-28 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 */
Jacob Pan253d2e52010-07-16 10:19:22 -0700273 unsigned int mmio_always_on:1; /* disallow turning off io/mem
274 decoding during bar sizing */
Rafael J. Wysockie80bb092009-09-08 23:14:49 +0200275 unsigned int wakeup_prepared:1;
Rafael J. Wysocki1ae861e2009-12-31 12:15:54 +0100276 unsigned int d3_delay; /* D3->D0 transition time in ms */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Shaohua Li7d715a62008-02-25 09:46:41 +0800278#ifdef CONFIG_PCIEASPM
279 struct pcie_link_state *link_state; /* ASPM link state. */
280#endif
281
linas392a1ce2005-11-16 17:10:41 -0600282 pci_channel_state_t error_state; /* current connectivity state */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 struct device dev; /* Generic device interface */
284
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 int cfg_size; /* Size of configuration space */
286
287 /*
288 * Instead of touching interrupt line and base address registers
289 * directly, use the values stored here. They might be different!
290 */
291 unsigned int irq;
292 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
Bjorn Helgaas58c84ed2010-07-15 09:41:42 -0600293 resource_size_t fw_addr[DEVICE_COUNT_RESOURCE]; /* FW-assigned addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295 /* These fields are used by common fixups */
296 unsigned int transparent:1; /* Transparent PCI bridge */
297 unsigned int multifunction:1;/* Part of multi-function device */
298 /* keep track of device state */
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -0800299 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 unsigned int is_busmaster:1; /* device is busmaster */
Kristen Accardi4602b882005-08-16 15:15:58 -0700301 unsigned int no_msi:1; /* device may not use msi */
Brian Kinge04b0ea2005-09-27 01:21:55 -0700302 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
Doug Thompsonbd8481e2006-05-08 17:06:09 -0700303 unsigned int broken_parity_status:1; /* Device generates false positive parity */
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200304 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
Shaohua Li99dc8042006-05-26 10:58:27 +0800305 unsigned int msi_enabled:1;
306 unsigned int msix_enabled:1;
Yu Zhao58c3a722008-10-14 14:02:53 +0800307 unsigned int ari_enabled:1; /* ARI forwarding */
Tejun Heo9ac78492007-01-20 16:00:26 +0900308 unsigned int is_managed:1;
Kenji Kaneshige6d3be842010-02-09 12:21:27 +0900309 unsigned int is_pcie:1; /* Obsolete. Will be removed.
310 Use pci_is_pcie() instead */
Mike Mason260d7032009-07-30 15:33:21 -0700311 unsigned int needs_freset:1; /* Dev requires fundamental reset */
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100312 unsigned int state_saved:1;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800313 unsigned int is_physfn:1;
Yu Zhaodd7cc442009-03-20 11:25:15 +0800314 unsigned int is_virtfn:1;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +0300315 unsigned int reset_fn:1;
Eric W. Biederman28760482009-09-09 14:09:24 -0700316 unsigned int is_hotplug_bridge:1;
Huang Yingaffb72c2010-05-18 14:35:16 +0800317 unsigned int __aer_firmware_first_valid:1;
318 unsigned int __aer_firmware_first:1;
David Millerba698ad2007-10-25 01:16:30 -0700319 pci_dev_flags_t dev_flags;
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800320 atomic_t enable_cnt; /* pci_enable_device has been called */
Kristen Accardi4602b882005-08-16 15:15:58 -0700321
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 u32 saved_config_space[16]; /* config space saved at suspend time */
Shaohua Li41017f02006-02-08 17:11:38 +0800323 struct hlist_head saved_cap_space;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
325 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
326 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
venkatesh.pallipadi@intel.com45aec1ae2008-03-18 17:00:22 -0700327 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700328#ifdef CONFIG_PCI_MSI
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000329 struct list_head msi_list;
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700330#endif
Ben Hutchings94e61082008-03-05 16:52:39 +0000331 struct pci_vpd *vpd;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800332#ifdef CONFIG_PCI_IOV
Yu Zhaodd7cc442009-03-20 11:25:15 +0800333 union {
334 struct pci_sriov *sriov; /* SR-IOV capability related */
335 struct pci_dev *physfn; /* the PF this VF is associated with */
336 };
Yu Zhao302b4212009-05-18 13:51:32 +0800337 struct pci_ats *ats; /* Address Translation Service */
Yu Zhaod1b054d2009-03-20 11:25:11 +0800338#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339};
340
Yinghaidda56542010-04-09 01:07:55 +0100341static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
342{
343#ifdef CONFIG_PCI_IOV
344 if (dev->is_virtfn)
345 dev = dev->physfn;
346#endif
347
348 return dev;
349}
350
Michael Ellerman65891212007-04-05 17:19:08 +1000351extern struct pci_dev *alloc_pci_dev(void);
352
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353#define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
354#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
355#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
356
Linas Vepstasa7369f12006-12-12 16:55:59 -0600357static inline int pci_channel_offline(struct pci_dev *pdev)
358{
359 return (pdev->error_state != pci_channel_io_normal);
360}
361
Shaohua Li41017f02006-02-08 17:11:38 +0800362static inline struct pci_cap_saved_state *pci_find_saved_cap(
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800363 struct pci_dev *pci_dev, char cap)
Shaohua Li41017f02006-02-08 17:11:38 +0800364{
365 struct pci_cap_saved_state *tmp;
366 struct hlist_node *pos;
367
368 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
369 if (tmp->cap_nr == cap)
370 return tmp;
371 }
372 return NULL;
373}
374
375static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
376 struct pci_cap_saved_state *new_cap)
377{
378 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
379}
380
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700381/*
382 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
383 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
384 * buses below host bridges or subtractive decode bridges) go in the list.
385 * Use pci_bus_for_each_resource() to iterate through all the resources.
386 */
387
388/*
389 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
390 * and there's no way to program the bridge with the details of the window.
391 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
392 * decode bit set, because they are explicit and can be programmed with _SRS.
393 */
394#define PCI_SUBTRACTIVE_DECODE 0x1
395
396struct pci_bus_resource {
397 struct list_head list;
398 struct resource *res;
399 unsigned int flags;
400};
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700401
402#define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404struct pci_bus {
405 struct list_head node; /* node in list of buses */
406 struct pci_bus *parent; /* parent bus this bridge is on */
407 struct list_head children; /* list of child buses */
408 struct list_head devices; /* list of devices on this bus */
409 struct pci_dev *self; /* bridge device as seen by parent */
Alex Chiangf46753c2008-06-10 15:28:50 -0600410 struct list_head slots; /* list of slots on this bus */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700411 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
412 struct list_head resources; /* address space routed to this bus */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
414 struct pci_ops *ops; /* configuration access functions */
415 void *sysdata; /* hook for sys-specific extension */
416 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
417
418 unsigned char number; /* bus number */
419 unsigned char primary; /* number of primary bridge */
420 unsigned char secondary; /* number of secondary bridge */
421 unsigned char subordinate; /* max number of subordinate buses */
Matthew Wilcox3749c512009-12-13 08:11:32 -0500422 unsigned char max_bus_speed; /* enum pci_bus_speed */
423 unsigned char cur_bus_speed; /* enum pci_bus_speed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
425 char name[48];
426
427 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200428 pci_bus_flags_t bus_flags; /* Inherited by child busses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 struct device *bridge;
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400430 struct device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
432 struct bin_attribute *legacy_mem; /* legacy mem */
Greg Kroah-Hartmancc74d962008-03-12 21:48:03 -0700433 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434};
435
436#define pci_bus_b(n) list_entry(n, struct pci_bus, node)
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400437#define to_pci_bus(n) container_of(n, struct pci_bus, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
Kenji Kaneshige79af72d2009-03-20 14:55:55 -0600439/*
440 * Returns true if the pci bus is root (behind host-pci bridge),
441 * false otherwise
442 */
443static inline bool pci_is_root_bus(struct pci_bus *pbus)
444{
445 return !(pbus->parent);
446}
447
Rafael J. Wysocki16cf0eb2009-01-05 14:50:27 +0100448#ifdef CONFIG_PCI_MSI
449static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
450{
451 return pci_dev->msi_enabled || pci_dev->msix_enabled;
452}
453#else
454static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
455#endif
456
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457/*
458 * Error values that may be returned by PCI functions.
459 */
460#define PCIBIOS_SUCCESSFUL 0x00
461#define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
462#define PCIBIOS_BAD_VENDOR_ID 0x83
463#define PCIBIOS_DEVICE_NOT_FOUND 0x86
464#define PCIBIOS_BAD_REGISTER_NUMBER 0x87
465#define PCIBIOS_SET_FAILED 0x88
466#define PCIBIOS_BUFFER_TOO_SMALL 0x89
467
468/* Low-level architecture-dependent routines */
469
470struct pci_ops {
471 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
472 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
473};
474
Matthew Wilcoxb6ce0682008-02-10 09:45:28 -0500475/*
476 * ACPI needs to be able to access PCI config space before we've done a
477 * PCI bus scan and created pci_bus structures.
478 */
479extern int raw_pci_read(unsigned int domain, unsigned int bus,
480 unsigned int devfn, int reg, int len, u32 *val);
481extern int raw_pci_write(unsigned int domain, unsigned int bus,
482 unsigned int devfn, int reg, int len, u32 val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
484struct pci_bus_region {
Benjamin Herrenschmidtc40a22e2007-12-10 17:32:15 +1100485 resource_size_t start;
486 resource_size_t end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487};
488
489struct pci_dynids {
490 spinlock_t lock; /* protects list, index */
491 struct list_head list; /* for IDs added at runtime */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492};
493
linas392a1ce2005-11-16 17:10:41 -0600494/* ---------------------------------------------------------------- */
495/** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
Rolf Eike Beer579082d2007-07-10 13:35:05 +0200496 * a set of callbacks in struct pci_error_handlers, then that device driver
linas392a1ce2005-11-16 17:10:41 -0600497 * will be notified of PCI bus errors, and will be driven to recovery
498 * when an error occurs.
499 */
500
501typedef unsigned int __bitwise pci_ers_result_t;
502
503enum pci_ers_result {
504 /* no result/none/not supported in device driver */
505 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
506
507 /* Device driver can recover without slot reset */
508 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
509
510 /* Device driver wants slot to be reset. */
511 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
512
513 /* Device has completely failed, is unrecoverable */
514 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
515
516 /* Device driver is fully recovered and operational */
517 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
518};
519
520/* PCI bus error event callbacks */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800521struct pci_error_handlers {
linas392a1ce2005-11-16 17:10:41 -0600522 /* PCI bus error detected on this device */
523 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800524 enum pci_channel_state error);
linas392a1ce2005-11-16 17:10:41 -0600525
526 /* MMIO has been re-enabled, but not DMA */
527 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
528
529 /* PCI Express link has been reset */
530 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
531
532 /* PCI slot has been reset */
533 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
534
535 /* Device driver may resume normal operations */
536 void (*resume)(struct pci_dev *dev);
537};
538
539/* ---------------------------------------------------------------- */
540
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541struct module;
542struct pci_driver {
543 struct list_head node;
Stephen Hemminger42b21932010-09-02 14:28:51 -0700544 const char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
546 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
547 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
548 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700549 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
550 int (*resume_early) (struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 int (*resume) (struct pci_dev *dev); /* Device woken up */
Greg KHc8958172005-04-08 14:53:31 +0900552 void (*shutdown) (struct pci_dev *dev);
linas392a1ce2005-11-16 17:10:41 -0600553 struct pci_error_handlers *err_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 struct device_driver driver;
555 struct pci_dynids dynids;
556};
557
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800558#define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
560/**
Andrew Morton9f9351b2008-03-10 11:43:34 -0700561 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100562 * @_table: device table name
563 *
564 * This macro is used to create a struct pci_device_id array (a device table)
565 * in a generic manner.
566 */
Andrew Morton9f9351b2008-03-10 11:43:34 -0700567#define DEFINE_PCI_DEVICE_TABLE(_table) \
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100568 const struct pci_device_id _table[] __devinitconst
569
570/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 * PCI_DEVICE - macro used to describe a specific pci device
572 * @vend: the 16 bit PCI Vendor ID
573 * @dev: the 16 bit PCI Device ID
574 *
575 * This macro is used to create a struct pci_device_id that matches a
576 * specific device. The subvendor and subdevice fields will be set to
577 * PCI_ANY_ID.
578 */
579#define PCI_DEVICE(vend,dev) \
580 .vendor = (vend), .device = (dev), \
581 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
582
583/**
584 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
585 * @dev_class: the class, subclass, prog-if triple for this device
586 * @dev_class_mask: the class mask for this device
587 *
588 * This macro is used to create a struct pci_device_id that matches a
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700589 * specific PCI class. The vendor, device, subvendor, and subdevice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 * fields will be set to PCI_ANY_ID.
591 */
592#define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
593 .class = (dev_class), .class_mask = (dev_class_mask), \
594 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
595 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
596
Alan Cox1597cac2006-12-04 15:14:45 -0800597/**
598 * PCI_VDEVICE - macro used to describe a specific pci device in short form
Zhao, Yuc322b282008-10-13 19:36:05 +0800599 * @vendor: the vendor name
600 * @device: the 16 bit PCI Device ID
Alan Cox1597cac2006-12-04 15:14:45 -0800601 *
602 * This macro is used to create a struct pci_device_id that matches a
603 * specific PCI device. The subvendor, and subdevice fields will be set
604 * to PCI_ANY_ID. The macro allows the next field to follow as the device
605 * private data.
606 */
607
608#define PCI_VDEVICE(vendor, device) \
609 PCI_VENDOR_ID_##vendor, (device), \
610 PCI_ANY_ID, PCI_ANY_ID, 0, 0
611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612/* these external functions are only available when PCI support is enabled */
613#ifdef CONFIG_PCI
614
615extern struct bus_type pci_bus_type;
616
617/* Do NOT directly access these two variables, unless you are arch specific pci
618 * code, or pci core code. */
619extern struct list_head pci_root_buses; /* list of all known PCI buses */
Zhang, Yanmined4aaad2007-07-15 23:39:39 -0700620/* Some device drivers need know if pci is initiated */
621extern int no_pci_devices(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
623void pcibios_fixup_bus(struct pci_bus *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700624int __must_check pcibios_enable_device(struct pci_dev *, int mask);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800625char *pcibios_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
627/* Used only when drivers/pci/setup.c is used */
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100628resource_size_t pcibios_align_resource(void *, const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100629 resource_size_t,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700630 resource_size_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631void pcibios_update_irq(struct pci_dev *, int irq);
632
Benjamin Herrenschmidt2d1c8612009-12-09 17:52:13 +1100633/* Weak but can be overriden by arch */
634void pci_fixup_cardbus(struct pci_bus *);
635
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636/* Generic PCI functions used internally */
637
Mauro Carvalho Chehabd1fd4fb2009-07-10 18:39:53 -0300638void pcibios_scan_specific_bus(int busn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639extern struct pci_bus *pci_find_bus(int domain, int busnr);
akpm@linux-foundation.orgc48f1672009-02-03 15:45:26 -0800640void pci_bus_add_devices(const struct pci_bus *bus);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800641struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
642 struct pci_ops *ops, void *sysdata);
Sam Ravnborg98db6f12008-04-29 22:38:48 +0200643static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800644 void *sysdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645{
Rajesh Shahc431ada2005-04-28 00:25:45 -0700646 struct pci_bus *root_bus;
647 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
648 if (root_bus)
649 pci_bus_add_devices(root_bus);
650 return root_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800652struct pci_bus *pci_create_bus(struct device *parent, int bus,
653 struct pci_ops *ops, void *sysdata);
654struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
655 int busnr);
Matthew Wilcox3749c512009-12-13 08:11:32 -0500656void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
Alex Chiangf46753c2008-06-10 15:28:50 -0600657struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
Alex Chiang828f3762008-10-20 17:40:52 -0600658 const char *name,
659 struct hotplug_slot *hotplug);
Alex Chiangf46753c2008-06-10 15:28:50 -0600660void pci_destroy_slot(struct pci_slot *slot);
Alex Chiangd25b7c82008-10-20 17:40:47 -0600661void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662int pci_scan_slot(struct pci_bus *bus, int devfn);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800663struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
Paul Mackerrascdb9b9f2005-09-06 09:31:03 +1000664void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665unsigned int pci_scan_child_bus(struct pci_bus *bus);
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700666int __must_check pci_bus_add_device(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667void pci_read_bridge_bases(struct pci_bus *child);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800668struct resource *pci_find_parent_resource(const struct pci_dev *dev,
669 struct resource *res);
Bjorn Helgaas57c2cf72008-12-11 11:24:23 -0700670u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
Bjorn Helgaas68feac82008-12-16 21:36:55 -0700672u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
674extern void pci_dev_put(struct pci_dev *dev);
675extern void pci_remove_bus(struct pci_bus *b);
676extern void pci_remove_bus_device(struct pci_dev *dev);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700677extern void pci_stop_bus_device(struct pci_dev *dev);
Dominik Brodowskib3743fa2005-09-09 13:03:23 -0700678void pci_setup_cardbus(struct pci_bus *bus);
Matt Domsch6b4b78f2006-09-29 15:23:23 -0500679extern void pci_sort_breadthfirst(void);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +0000680#define dev_is_pci(d) ((d)->bus == &pci_bus_type)
681#define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
682#define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683
684/* Generic PCI functions exported to card drivers */
685
James Bottomley388c8c12008-08-03 13:02:12 -0500686enum pci_lost_interrupt_reason {
687 PCI_LOST_IRQ_NO_INFORMATION = 0,
688 PCI_LOST_IRQ_DISABLE_MSI,
689 PCI_LOST_IRQ_DISABLE_MSIX,
690 PCI_LOST_IRQ_DISABLE_ACPI,
691};
692enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800693int pci_find_capability(struct pci_dev *dev, int cap);
694int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
695int pci_find_ext_capability(struct pci_dev *dev, int cap);
Jesse Barnescf4c43d2009-07-15 13:13:00 -0700696int pci_bus_find_ext_capability(struct pci_bus *bus, unsigned int devfn,
697 int cap);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800698int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
699int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
Alan Cox29f3eb62006-10-16 16:20:21 -0700700struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
Andrew Mortond42552c2006-10-21 10:24:12 -0700702struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
703 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800704struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 unsigned int ss_vendor, unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -0700706 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800707struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
Andrew Patterson3c299dc2009-10-12 13:14:00 -0600708struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
709 unsigned int devfn);
710static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
711 unsigned int devfn)
712{
713 return pci_get_domain_bus_and_slot(0, bus, devfn);
714}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800715struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716int pci_dev_present(const struct pci_device_id *ids);
717
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800718int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
719 int where, u8 *val);
720int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
721 int where, u16 *val);
722int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
723 int where, u32 *val);
724int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
725 int where, u8 val);
726int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
727 int where, u16 val);
728int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
729 int where, u32 val);
Huang Yinga72b46c2009-04-24 10:45:17 +0800730struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731
732static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
733{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800734 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735}
736static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
737{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800738 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800740static inline int pci_read_config_dword(struct pci_dev *dev, int where,
741 u32 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800743 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744}
745static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
746{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800747 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748}
749static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
750{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800751 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800753static inline int pci_write_config_dword(struct pci_dev *dev, int where,
754 u32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800756 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757}
758
Andrew Morton4a7fb632006-08-14 22:43:17 -0700759int __must_check pci_enable_device(struct pci_dev *dev);
Benjamin Herrenschmidtb7189892007-12-20 15:28:08 +1100760int __must_check pci_enable_device_io(struct pci_dev *dev);
761int __must_check pci_enable_device_mem(struct pci_dev *dev);
Tejun Heo0b62e132007-07-27 14:43:35 +0900762int __must_check pci_reenable_device(struct pci_dev *);
Tejun Heo9ac78492007-01-20 16:00:26 +0900763int __must_check pcim_enable_device(struct pci_dev *pdev);
764void pcim_pin_device(struct pci_dev *pdev);
765
Yuji Shimada296ccb02009-04-03 16:41:46 +0900766static inline int pci_is_enabled(struct pci_dev *pdev)
767{
768 return (atomic_read(&pdev->enable_cnt) > 0);
769}
770
Tejun Heo9ac78492007-01-20 16:00:26 +0900771static inline int pci_is_managed(struct pci_dev *pdev)
772{
773 return pdev->is_managed;
774}
775
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776void pci_disable_device(struct pci_dev *dev);
777void pci_set_master(struct pci_dev *dev);
Ben Hutchings6a479072008-12-23 03:08:29 +0000778void pci_clear_master(struct pci_dev *dev);
Brian Kingf7bdd122007-04-06 16:39:36 -0500779int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
Tejun Heo15ea76d2009-09-22 17:34:48 +0900780int pci_set_cacheline_size(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781#define HAVE_PCI_SET_MWI
Andrew Morton4a7fb632006-08-14 22:43:17 -0700782int __must_check pci_set_mwi(struct pci_dev *dev);
Randy Dunlap694625c2007-07-09 11:55:54 -0700783int pci_try_set_mwi(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784void pci_clear_mwi(struct pci_dev *dev);
Brett M Russa04ce0f2005-08-15 15:23:41 -0400785void pci_intx(struct pci_dev *dev, int enable);
Eric W. Biedermanf5f2b132007-03-05 00:30:07 -0800786void pci_msi_off(struct pci_dev *dev);
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800787int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -0800788int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
Peter Orubad556ad42007-05-15 13:59:13 +0200789int pcix_get_max_mmrbc(struct pci_dev *dev);
790int pcix_get_mmrbc(struct pci_dev *dev);
791int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
Brice Goglin2637e5b2007-08-14 12:43:48 +0200792int pcie_get_readrq(struct pci_dev *dev);
Peter Orubad556ad42007-05-15 13:59:13 +0200793int pcie_set_readrq(struct pci_dev *dev, int rq);
Yu Zhao8c1c6992009-06-13 15:52:13 +0800794int __pci_reset_function(struct pci_dev *dev);
Sheng Yang8dd7f802008-10-21 17:38:25 +0800795int pci_reset_function(struct pci_dev *dev);
Yu Zhao14add802008-11-22 02:38:52 +0800796void pci_update_resource(struct pci_dev *dev, int resno);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700797int __must_check pci_assign_resource(struct pci_dev *dev, int i);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900798int pci_select_bars(struct pci_dev *dev, unsigned long flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
800/* ROM control related routines */
Alan Coxe416de52008-09-23 17:25:10 +0100801int pci_enable_rom(struct pci_dev *pdev);
802void pci_disable_rom(struct pci_dev *pdev);
Dave Jones144a50e2005-08-09 00:20:10 -0400803void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
Timothy S. Nelson97c44832009-01-30 06:12:47 +1100805size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
807/* Power management related routines */
808int pci_save_state(struct pci_dev *dev);
809int pci_restore_state(struct pci_dev *dev);
Rafael J. Wysocki0e5dd462009-03-26 22:51:40 +0100810int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
Linus Torvalds9c8550e2005-09-09 15:43:46 -0700811int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
812pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200813bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
Rafael J. Wysocki5a6c9b62008-08-08 00:14:24 +0200814void pci_pme_active(struct pci_dev *dev, bool enable);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100815int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
816 bool runtime, bool enable);
Rafael J. Wysocki0235c4f2008-08-18 21:38:00 +0200817int pci_wake_from_d3(struct pci_dev *dev, bool enable);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200818pci_power_t pci_target_state(struct pci_dev *dev);
Rafael J. Wysocki404cc2d2008-07-07 03:35:26 +0200819int pci_prepare_to_sleep(struct pci_dev *dev);
820int pci_back_from_sleep(struct pci_dev *dev);
Rafael J. Wysockib67ea762010-02-17 23:44:09 +0100821bool pci_dev_run_wake(struct pci_dev *dev);
Matthew Garrettbf4d2902010-10-04 14:22:26 -0400822bool pci_check_pme_status(struct pci_dev *dev);
823void pci_wakeup_event(struct pci_dev *dev);
824void pci_pme_wakeup_bus(struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100826static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
827 bool enable)
828{
829 return __pci_enable_wake(dev, state, false, enable);
830}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
Benjamin Herrenschmidtbb209c82010-01-26 17:10:03 +0000832/* For use by arch with custom probe code */
833void set_pcie_port_type(struct pci_dev *pdev);
834void set_pcie_hotplug_bridge(struct pci_dev *pdev);
835
Kumar Galace5ccde2007-07-16 23:27:10 -0500836/* Functions for PCI Hotplug drivers to use */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800837int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
Alex Chiang3ed4fd92009-03-20 14:56:25 -0600838#ifdef CONFIG_HOTPLUG
839unsigned int pci_rescan_bus(struct pci_bus *bus);
840#endif
Kumar Galace5ccde2007-07-16 23:27:10 -0500841
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800842/* Vital product data routines */
843ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
844ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
Stephen Hemmingerdb567942008-12-18 09:17:16 -0800845int pci_vpd_truncate(struct pci_dev *dev, size_t size);
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800846
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
Andrew Mortonea741552009-02-18 10:44:29 -0800848void pci_bus_assign_resources(const struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849void pci_bus_size_bridges(struct pci_bus *bus);
850int pci_claim_resource(struct pci_dev *, int);
851void pci_assign_unassigned_resources(void);
Yinghai Lu6841ec62010-01-22 01:02:25 -0800852void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853void pdev_enable_device(struct pci_dev *);
854void pdev_sort_resources(struct pci_dev *, struct resource_list *);
Bjorn Helgaas842de402008-03-04 11:56:47 -0700855int pci_enable_resources(struct pci_dev *, int mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
857 int (*)(struct pci_dev *, u8, u8));
858#define HAVE_PCI_REQ_REGIONS 2
Andrew Morton4a7fb632006-08-14 22:43:17 -0700859int __must_check pci_request_regions(struct pci_dev *, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700860int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861void pci_release_regions(struct pci_dev *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700862int __must_check pci_request_region(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700863int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864void pci_release_region(struct pci_dev *, int);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900865int pci_request_selected_regions(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700866int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900867void pci_release_selected_regions(struct pci_dev *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
869/* drivers/pci/bus.c */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700870void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
871struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
872void pci_bus_remove_resources(struct pci_bus *bus);
873
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700874#define pci_bus_for_each_resource(bus, res, i) \
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700875 for (i = 0; \
876 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
877 i++)
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700878
Andrew Morton4a7fb632006-08-14 22:43:17 -0700879int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
880 struct resource *res, resource_size_t size,
881 resource_size_t align, resource_size_t min,
882 unsigned int type_mask,
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100883 resource_size_t (*alignf)(void *,
884 const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100885 resource_size_t,
886 resource_size_t),
Andrew Morton4a7fb632006-08-14 22:43:17 -0700887 void *alignf_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888void pci_enable_bridges(struct pci_bus *bus);
889
Laurent riffard863b18f2005-10-27 23:12:54 +0200890/* Proper probing supporting hot-pluggable devices */
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -0800891int __must_check __pci_register_driver(struct pci_driver *, struct module *,
892 const char *mod_name);
Andrew Mortonbba81162008-07-30 12:07:04 -0700893
894/*
895 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
896 */
897#define pci_register_driver(driver) \
898 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
Laurent riffard863b18f2005-10-27 23:12:54 +0200899
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800900void pci_unregister_driver(struct pci_driver *dev);
901void pci_remove_behind_bridge(struct pci_dev *dev);
902struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
Tejun Heo9dba9102009-09-03 15:26:36 +0900903int pci_add_dynid(struct pci_driver *drv,
904 unsigned int vendor, unsigned int device,
905 unsigned int subvendor, unsigned int subdevice,
906 unsigned int class, unsigned int class_mask,
907 unsigned long driver_data);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800908const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
909 struct pci_dev *dev);
910int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
911 int pass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912
Zhang, Yanmin70298c62009-06-16 13:34:38 +0800913void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
Paul Mackerrascecf4862005-08-18 14:33:01 +1000914 void *userdata);
Yinghai Lu70b9f7d2008-04-28 16:27:23 -0700915int pci_cfg_space_size_ext(struct pci_dev *dev);
Benjamin Herrenschmidtac7dc652005-12-13 18:09:16 +1100916int pci_cfg_space_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800917unsigned char pci_bus_max_busnr(struct pci_bus *bus);
Paul Mackerrascecf4862005-08-18 14:33:01 +1000918
Benjamin Herrenschmidtdeb2d2e2009-08-11 15:52:06 +1000919int pci_set_vga_state(struct pci_dev *pdev, bool decode,
920 unsigned int command_bits, bool change_bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921/* kmem_cache style wrapper around pci_alloc_consistent() */
922
FUJITA Tomonorif41b1772010-03-10 15:23:30 -0800923#include <linux/pci-dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924#include <linux/dmapool.h>
925
926#define pci_pool dma_pool
927#define pci_pool_create(name, pdev, size, align, allocation) \
928 dma_pool_create(name, &pdev->dev, size, align, allocation)
929#define pci_pool_destroy(pool) dma_pool_destroy(pool)
930#define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
931#define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
932
David S. Millere24c2d92005-06-02 12:55:50 -0700933enum pci_dma_burst_strategy {
934 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
935 strategy_parameter is N/A */
936 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
937 byte boundaries */
938 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
939 strategy_parameter byte boundaries */
940};
941
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942struct msix_entry {
Yinghai Lu16dbef42008-08-15 19:36:45 -0700943 u32 vector; /* kernel uses to write allocated vector */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 u16 entry; /* driver uses to specify entry, OS writes */
945};
946
Eric W. Biederman0366f8f2006-10-04 02:16:33 -0700947
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948#ifndef CONFIG_PCI_MSI
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -0400949static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800950{
951 return -1;
952}
953
Yinghai Lud52877c2008-04-23 14:58:09 -0700954static inline void pci_msi_shutdown(struct pci_dev *dev)
955{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800956static inline void pci_disable_msi(struct pci_dev *dev)
957{ }
958
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +0100959static inline int pci_msix_table_size(struct pci_dev *dev)
960{
961 return 0;
962}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800963static inline int pci_enable_msix(struct pci_dev *dev,
964 struct msix_entry *entries, int nvec)
965{
966 return -1;
967}
968
Yinghai Lud52877c2008-04-23 14:58:09 -0700969static inline void pci_msix_shutdown(struct pci_dev *dev)
970{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800971static inline void pci_disable_msix(struct pci_dev *dev)
972{ }
973
974static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
975{ }
976
977static inline void pci_restore_msi_state(struct pci_dev *dev)
978{ }
Andrew Patterson07ae95f2008-11-10 15:31:05 -0700979static inline int pci_msi_enabled(void)
980{
981 return 0;
982}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983#else
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -0400984extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -0700985extern void pci_msi_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986extern void pci_disable_msi(struct pci_dev *dev);
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +0100987extern int pci_msix_table_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800988extern int pci_enable_msix(struct pci_dev *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 struct msix_entry *entries, int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -0700990extern void pci_msix_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991extern void pci_disable_msix(struct pci_dev *dev);
992extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
Linas Vepstas94688cf2007-11-07 15:43:59 -0600993extern void pci_restore_msi_state(struct pci_dev *dev);
Andrew Patterson07ae95f2008-11-10 15:31:05 -0700994extern int pci_msi_enabled(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995#endif
996
Andrew Patterson3e1b1602008-11-10 15:30:55 -0700997#ifndef CONFIG_PCIEASPM
998static inline int pcie_aspm_enabled(void)
999{
1000 return 0;
1001}
1002#else
1003extern int pcie_aspm_enabled(void);
1004#endif
1005
Andrew Patterson43c16402009-04-22 16:52:09 -06001006#ifndef CONFIG_PCIE_ECRC
1007static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
1008{
1009 return;
1010}
1011static inline void pcie_ecrc_get_policy(char *str) {};
1012#else
1013extern void pcie_set_ecrc_checking(struct pci_dev *dev);
1014extern void pcie_ecrc_get_policy(char *str);
1015#endif
1016
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001017#define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
1018
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001019#ifdef CONFIG_HT_IRQ
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001020/* The functions a driver should call */
1021int ht_create_irq(struct pci_dev *dev, int idx);
1022void ht_destroy_irq(unsigned int irq);
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001023#endif /* CONFIG_HT_IRQ */
1024
Brian Kinge04b0ea2005-09-27 01:21:55 -07001025extern void pci_block_user_cfg_access(struct pci_dev *dev);
1026extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
1027
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001028/*
1029 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1030 * a PCI domain is defined to be a set of PCI busses which share
1031 * configuration space.
1032 */
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001033#ifdef CONFIG_PCI_DOMAINS
1034extern int pci_domains_supported;
1035#else
1036enum { pci_domains_supported = 0 };
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001037static inline int pci_domain_nr(struct pci_bus *bus)
1038{
1039 return 0;
1040}
1041
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001042static inline int pci_proc_domain(struct pci_bus *bus)
1043{
1044 return 0;
1045}
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001046#endif /* CONFIG_PCI_DOMAINS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
Mike Travis95a8b6e2010-02-02 14:38:13 -08001048/* some architectures require additional setup to direct VGA traffic */
1049typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1050 unsigned int command_bits, bool change_bridge);
1051extern void pci_register_set_vga_state(arch_set_vga_state_t func);
1052
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001053#else /* CONFIG_PCI is not enabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054
1055/*
1056 * If the system does not have PCI, clearly these return errors. Define
1057 * these as simple inline functions to avoid hair in drivers.
1058 */
1059
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001060#define _PCI_NOP(o, s, t) \
1061 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1062 int where, t val) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001064
1065#define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1066 _PCI_NOP(o, word, u16 x) \
1067 _PCI_NOP(o, dword, u32 x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068_PCI_NOP_ALL(read, *)
1069_PCI_NOP_ALL(write,)
1070
Andrew Mortond42552c2006-10-21 10:24:12 -07001071static inline struct pci_dev *pci_get_device(unsigned int vendor,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001072 unsigned int device,
1073 struct pci_dev *from)
1074{
1075 return NULL;
1076}
Andrew Mortond42552c2006-10-21 10:24:12 -07001077
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001078static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1079 unsigned int device,
1080 unsigned int ss_vendor,
1081 unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -07001082 struct pci_dev *from)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001083{
1084 return NULL;
1085}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001087static inline struct pci_dev *pci_get_class(unsigned int class,
1088 struct pci_dev *from)
1089{
1090 return NULL;
1091}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092
1093#define pci_dev_present(ids) (0)
Zhang, Yanmined4aaad2007-07-15 23:39:39 -07001094#define no_pci_devices() (1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095#define pci_dev_put(dev) do { } while (0)
1096
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001097static inline void pci_set_master(struct pci_dev *dev)
1098{ }
1099
1100static inline int pci_enable_device(struct pci_dev *dev)
1101{
1102 return -EIO;
1103}
1104
1105static inline void pci_disable_device(struct pci_dev *dev)
1106{ }
1107
1108static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1109{
1110 return -EIO;
1111}
1112
Randy Dunlap80be0382008-06-30 11:35:53 -07001113static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1114{
1115 return -EIO;
1116}
1117
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -08001118static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1119 unsigned int size)
1120{
1121 return -EIO;
1122}
1123
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -08001124static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1125 unsigned long mask)
1126{
1127 return -EIO;
1128}
1129
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001130static inline int pci_assign_resource(struct pci_dev *dev, int i)
1131{
1132 return -EBUSY;
1133}
1134
1135static inline int __pci_register_driver(struct pci_driver *drv,
1136 struct module *owner)
1137{
1138 return 0;
1139}
1140
1141static inline int pci_register_driver(struct pci_driver *drv)
1142{
1143 return 0;
1144}
1145
1146static inline void pci_unregister_driver(struct pci_driver *drv)
1147{ }
1148
1149static inline int pci_find_capability(struct pci_dev *dev, int cap)
1150{
1151 return 0;
1152}
1153
1154static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1155 int cap)
1156{
1157 return 0;
1158}
1159
1160static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1161{
1162 return 0;
1163}
1164
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165/* Power management related routines */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001166static inline int pci_save_state(struct pci_dev *dev)
1167{
1168 return 0;
1169}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001171static inline int pci_restore_state(struct pci_dev *dev)
1172{
1173 return 0;
1174}
1175
1176static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1177{
1178 return 0;
1179}
1180
1181static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1182 pm_message_t state)
1183{
1184 return PCI_D0;
1185}
1186
1187static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1188 int enable)
1189{
1190 return 0;
1191}
1192
1193static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1194{
1195 return -EIO;
1196}
1197
1198static inline void pci_release_regions(struct pci_dev *dev)
1199{ }
Sergei Shtylyov0da0ead2007-04-01 21:13:58 +04001200
Kumar Galaa46e8122005-07-29 12:16:27 -07001201#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1202
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001203static inline void pci_block_user_cfg_access(struct pci_dev *dev)
1204{ }
1205
1206static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
1207{ }
Brian Kinge04b0ea2005-09-27 01:21:55 -07001208
Randy Dunlapd80d0212007-07-01 12:06:37 -07001209static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1210{ return NULL; }
1211
1212static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1213 unsigned int devfn)
1214{ return NULL; }
1215
1216static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1217 unsigned int devfn)
1218{ return NULL; }
1219
Dave Airlie92298e62010-08-13 10:22:17 +10001220static inline int pci_domain_nr(struct pci_bus *bus)
1221{ return 0; }
1222
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001223#define dev_is_pci(d) (false)
1224#define dev_is_pf(d) (false)
1225#define dev_num_vf(d) (0)
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001226#endif /* CONFIG_PCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001228/* Include architecture-dependent settings and functions */
1229
1230#include <asm/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231
Yinghai Lu1f82de12009-04-23 20:48:32 -07001232#ifndef PCIBIOS_MAX_MEM_32
1233#define PCIBIOS_MAX_MEM_32 (-1)
1234#endif
1235
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236/* these helpers provide future and backwards compatibility
1237 * for accessing popular PCI BAR info */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001238#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1239#define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1240#define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241#define pci_resource_len(dev,bar) \
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001242 ((pci_resource_start((dev), (bar)) == 0 && \
1243 pci_resource_end((dev), (bar)) == \
1244 pci_resource_start((dev), (bar))) ? 0 : \
1245 \
1246 (pci_resource_end((dev), (bar)) - \
1247 pci_resource_start((dev), (bar)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
1249/* Similar to the helpers above, these manipulate per-pci_dev
1250 * driver-specific data. They are really just a wrapper around
1251 * the generic device structure functions of these calls.
1252 */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001253static inline void *pci_get_drvdata(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254{
1255 return dev_get_drvdata(&pdev->dev);
1256}
1257
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001258static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259{
1260 dev_set_drvdata(&pdev->dev, data);
1261}
1262
1263/* If you want to know what to call your pci_dev, ask this function.
1264 * Again, it's a wrapper around the generic device.
1265 */
Alexey Zaytsev2fc90f62009-06-24 16:22:30 +04001266static inline const char *pci_name(const struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267{
Greg KHc6c4f072008-07-03 09:49:39 -07001268 return dev_name(&pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269}
1270
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001271
1272/* Some archs don't want to expose struct resource to userland as-is
1273 * in sysfs and /proc
1274 */
1275#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1276static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001277 const struct resource *rsrc, resource_size_t *start,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -07001278 resource_size_t *end)
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001279{
1280 *start = rsrc->start;
1281 *end = rsrc->end;
1282}
1283#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1284
1285
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286/*
1287 * The world is not perfect and supplies us with broken PCI devices.
1288 * For at least a part of these bugs we need a work-around, so both
1289 * generic (drivers/pci/quirks.c) and per-architecture code can define
1290 * fixup hooks to be called for particular buggy devices.
1291 */
1292
1293struct pci_fixup {
1294 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1295 void (*hook)(struct pci_dev *dev);
1296};
1297
1298enum pci_fixup_pass {
1299 pci_fixup_early, /* Before probing BARs */
1300 pci_fixup_header, /* After reading configuration header */
1301 pci_fixup_final, /* Final phase of device fixups */
1302 pci_fixup_enable, /* pci_enable_device() time */
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001303 pci_fixup_resume, /* pci_device_resume() */
1304 pci_fixup_suspend, /* pci_device_suspend */
1305 pci_fixup_resume_early, /* pci_device_resume_early() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306};
1307
1308/* Anonymous variables would be nice... */
1309#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
Adrian Bunk3ff6eec2008-01-24 22:16:20 +01001310 static const struct pci_fixup __pci_fixup_##name __used \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 __attribute__((__section__(#section))) = { vendor, device, hook };
1312#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1313 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1314 vendor##device##hook, vendor, device, hook)
1315#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1316 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1317 vendor##device##hook, vendor, device, hook)
1318#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1319 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1320 vendor##device##hook, vendor, device, hook)
1321#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1322 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1323 vendor##device##hook, vendor, device, hook)
Alan Cox1597cac2006-12-04 15:14:45 -08001324#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1325 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1326 resume##vendor##device##hook, vendor, device, hook)
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001327#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1328 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1329 resume_early##vendor##device##hook, vendor, device, hook)
1330#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1331 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1332 suspend##vendor##device##hook, vendor, device, hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001334#ifdef CONFIG_PCI_QUIRKS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001336#else
1337static inline void pci_fixup_device(enum pci_fixup_pass pass,
1338 struct pci_dev *dev) {}
1339#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001341void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
Al Viro5ea81762007-02-11 15:41:31 +00001342void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001343void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
Al Viro5ea81762007-02-11 15:41:31 +00001344int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
Tejun Heo916fbfb2008-03-12 15:26:34 +09001345int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1346 const char *name);
Tejun Heoec04b072007-03-09 19:45:58 +09001347void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
Al Viro5ea81762007-02-11 15:41:31 +00001348
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349extern int pci_pci_problems;
Alan Cox236561e2006-09-30 23:27:03 -07001350#define PCIPCI_FAIL 1 /* No PCI PCI DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351#define PCIPCI_TRITON 2
1352#define PCIPCI_NATOMA 4
1353#define PCIPCI_VIAETBF 8
1354#define PCIPCI_VSFX 16
Alan Cox236561e2006-09-30 23:27:03 -07001355#define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1356#define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001358extern unsigned long pci_cardbus_io_size;
1359extern unsigned long pci_cardbus_mem_size;
David Howells491424c2009-12-14 14:13:44 +00001360extern u8 __devinitdata pci_dfl_cache_line_size;
Jesse Barnesac1aa472009-10-26 13:20:44 -07001361extern u8 pci_cache_line_size;
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001362
Eric W. Biederman28760482009-09-09 14:09:24 -07001363extern unsigned long pci_hotplug_io_size;
1364extern unsigned long pci_hotplug_mem_size;
1365
Adrian Bunk19792a02008-05-05 21:25:47 +03001366int pcibios_add_platform_entries(struct pci_dev *dev);
1367void pcibios_disable_device(struct pci_dev *dev);
1368int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1369 enum pcie_reset_state state);
Michael Ellerman575e3342007-05-08 12:03:07 +10001370
Robert Hancock7752d5c2008-02-15 01:27:20 -08001371#ifdef CONFIG_PCI_MMCONFIG
Yinghai Lubb63b422008-02-28 23:56:50 -08001372extern void __init pci_mmcfg_early_init(void);
Robert Hancock7752d5c2008-02-15 01:27:20 -08001373extern void __init pci_mmcfg_late_init(void);
1374#else
Yinghai Lubb63b422008-02-28 23:56:50 -08001375static inline void pci_mmcfg_early_init(void) { }
Robert Hancock7752d5c2008-02-15 01:27:20 -08001376static inline void pci_mmcfg_late_init(void) { }
1377#endif
1378
Andrew Patterson0ef5f8f2008-11-10 15:30:50 -07001379int pci_ext_cfg_avail(struct pci_dev *dev);
1380
Andrew Morton1684f5d2008-12-01 14:30:30 -08001381void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
Arjan van de Venaa42d7c2008-09-28 16:36:11 -07001382
Yu Zhaodd7cc442009-03-20 11:25:15 +08001383#ifdef CONFIG_PCI_IOV
1384extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1385extern void pci_disable_sriov(struct pci_dev *dev);
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001386extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001387extern int pci_num_vf(struct pci_dev *dev);
Yu Zhaodd7cc442009-03-20 11:25:15 +08001388#else
1389static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1390{
1391 return -ENODEV;
1392}
1393static inline void pci_disable_sriov(struct pci_dev *dev)
1394{
1395}
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001396static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
1397{
1398 return IRQ_NONE;
1399}
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001400static inline int pci_num_vf(struct pci_dev *dev)
1401{
1402 return 0;
1403}
Yu Zhaodd7cc442009-03-20 11:25:15 +08001404#endif
1405
Kenji Kaneshigec825bc92009-06-16 11:01:25 +09001406#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1407extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
1408extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1409#endif
1410
Kenji Kaneshiged7b7e602009-11-11 14:29:54 +09001411/**
1412 * pci_pcie_cap - get the saved PCIe capability offset
1413 * @dev: PCI device
1414 *
1415 * PCIe capability offset is calculated at PCI device initialization
1416 * time and saved in the data structure. This function returns saved
1417 * PCIe capability offset. Using this instead of pci_find_capability()
1418 * reduces unnecessary search in the PCI configuration space. If you
1419 * need to calculate PCIe capability offset from raw device for some
1420 * reasons, please use pci_find_capability() instead.
1421 */
1422static inline int pci_pcie_cap(struct pci_dev *dev)
1423{
1424 return dev->pcie_cap;
1425}
1426
Kenji Kaneshige7eb776c2009-11-11 14:35:22 +09001427/**
1428 * pci_is_pcie - check if the PCI device is PCI Express capable
1429 * @dev: PCI device
1430 *
1431 * Retrun true if the PCI device is PCI Express capable, false otherwise.
1432 */
1433static inline bool pci_is_pcie(struct pci_dev *dev)
1434{
1435 return !!pci_pcie_cap(dev);
1436}
1437
Chris Wright5d990b62009-12-04 12:15:21 -08001438void pci_request_acs(void);
1439
Matt Carlsona2ce7662010-02-26 14:04:39 +00001440
Matt Carlson7ad506f2010-02-26 14:04:40 +00001441#define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1442#define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT)
1443
1444/* Large Resource Data Type Tag Item Names */
1445#define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1446#define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1447#define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1448
1449#define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1450#define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1451#define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1452
1453/* Small Resource Data Type Tag Item Names */
1454#define PCI_VPD_STIN_END 0x78 /* End */
1455
1456#define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1457
1458#define PCI_VPD_SRDT_TIN_MASK 0x78
1459#define PCI_VPD_SRDT_LEN_MASK 0x07
1460
1461#define PCI_VPD_LRDT_TAG_SIZE 3
1462#define PCI_VPD_SRDT_TAG_SIZE 1
Matt Carlsona2ce7662010-02-26 14:04:39 +00001463
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001464#define PCI_VPD_INFO_FLD_HDR_SIZE 3
1465
Matt Carlson4067a852010-02-26 14:04:43 +00001466#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1467#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1468#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
1469
Matt Carlsona2ce7662010-02-26 14:04:39 +00001470/**
1471 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1472 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1473 *
1474 * Returns the extracted Large Resource Data Type length.
1475 */
1476static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1477{
1478 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1479}
1480
Matt Carlson7ad506f2010-02-26 14:04:40 +00001481/**
1482 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1483 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1484 *
1485 * Returns the extracted Small Resource Data Type length.
1486 */
1487static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1488{
1489 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1490}
1491
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001492/**
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001493 * pci_vpd_info_field_size - Extracts the information field length
1494 * @lrdt: Pointer to the beginning of an information field header
1495 *
1496 * Returns the extracted information field length.
1497 */
1498static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1499{
1500 return info_field[2];
1501}
1502
1503/**
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001504 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1505 * @buf: Pointer to buffered vpd data
1506 * @off: The offset into the buffer at which to begin the search
1507 * @len: The length of the vpd buffer
1508 * @rdt: The Resource Data Type to search for
1509 *
1510 * Returns the index where the Resource Data Type was found or
1511 * -ENOENT otherwise.
1512 */
1513int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1514
Matt Carlson4067a852010-02-26 14:04:43 +00001515/**
1516 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1517 * @buf: Pointer to buffered vpd data
1518 * @off: The offset into the buffer at which to begin the search
1519 * @len: The length of the buffer area, relative to off, in which to search
1520 * @kw: The keyword to search for
1521 *
1522 * Returns the index where the information field keyword was found or
1523 * -ENOENT otherwise.
1524 */
1525int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1526 unsigned int len, const char *kw);
1527
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528#endif /* __KERNEL__ */
1529#endif /* LINUX_PCI_H */