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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * pci.h
3 *
4 * PCI defines and function prototypes
5 * Copyright 1994, Drew Eckhardt
6 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
7 *
8 * For more information, please consult the following manuals (look at
9 * http://www.pcisig.com/ for how to get them):
10 *
11 * PCI BIOS Specification
12 * PCI Local Bus Specification
13 * PCI to PCI Bridge Specification
14 * PCI System Design Guide
15 */
16
17#ifndef LINUX_PCI_H
18#define LINUX_PCI_H
19
Alex Chiangf46753c2008-06-10 15:28:50 -060020#include <linux/pci_regs.h> /* The pci register defines */
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
Linus Torvalds1da177e2005-04-16 15:20:36 -070022/*
23 * The PCI interface treats multi-function devices as independent
24 * devices. The slot/function address of each device is encoded
25 * in a single byte as follows:
26 *
27 * 7:3 = slot
28 * 2:0 = function
29 */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -080030#define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
32#define PCI_FUNC(devfn) ((devfn) & 0x07)
33
34/* Ioctls for /proc/bus/pci/X/Y nodes. */
35#define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
36#define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
37#define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
38#define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
39#define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
40
41#ifdef __KERNEL__
42
David Woodhouse778382e2006-04-29 01:46:02 +010043#include <linux/mod_devicetable.h>
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/types.h>
Sam Ravnborg98db6f12008-04-29 22:38:48 +020046#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/ioport.h>
48#include <linux/list.h>
Andrew Morton4a7fb632006-08-14 22:43:17 -070049#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#include <linux/errno.h>
Alex Chiangf46753c2008-06-10 15:28:50 -060051#include <linux/kobject.h>
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -080052#include <asm/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include <linux/device.h>
Stephen Rothwell1388cc92008-10-22 13:39:55 +110054#include <linux/io.h>
Yu Zhao74bb1bc2009-03-20 11:25:16 +080055#include <linux/irqreturn.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Adrian Bunk7e7a43c2006-12-19 13:12:07 -080057/* Include the ID list */
58#include <linux/pci_ids.h>
59
Alex Chiangf46753c2008-06-10 15:28:50 -060060/* pci_slot represents a physical slot */
61struct pci_slot {
62 struct pci_bus *bus; /* The bus this slot is on */
63 struct list_head list; /* node in list of slots on this bus */
64 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
65 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
66 struct kobject kobj;
67};
68
Alex Chiang0ad772e2008-10-20 17:41:07 -060069static inline const char *pci_slot_name(const struct pci_slot *slot)
70{
71 return kobject_name(&slot->kobj);
72}
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074/* File state for mmap()s on /proc/bus/pci/X/Y */
75enum pci_mmap_state {
76 pci_mmap_io,
77 pci_mmap_mem
78};
79
80/* This defines the direction arg to the DMA mapping routines. */
81#define PCI_DMA_BIDIRECTIONAL 0
82#define PCI_DMA_TODEVICE 1
83#define PCI_DMA_FROMDEVICE 2
84#define PCI_DMA_NONE 3
85
Yu Zhaofde09c62008-11-22 02:39:32 +080086/*
87 * For PCI devices, the region numbers are assigned this way:
88 */
89enum {
90 /* #0-5: standard PCI resources */
91 PCI_STD_RESOURCES,
92 PCI_STD_RESOURCE_END = 5,
93
94 /* #6: expansion ROM resource */
95 PCI_ROM_RESOURCE,
96
Yu Zhaod1b054d2009-03-20 11:25:11 +080097 /* device specific resources */
98#ifdef CONFIG_PCI_IOV
99 PCI_IOV_RESOURCES,
100 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
101#endif
102
Yu Zhaofde09c62008-11-22 02:39:32 +0800103 /* resources assigned to buses behind the bridge */
104#define PCI_BRIDGE_RESOURCE_NUM 4
105
106 PCI_BRIDGE_RESOURCES,
107 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
108 PCI_BRIDGE_RESOURCE_NUM - 1,
109
110 /* total resources associated with a PCI device */
111 PCI_NUM_RESOURCES,
112
113 /* preserve this for compatibility */
114 DEVICE_COUNT_RESOURCE
115};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117typedef int __bitwise pci_power_t;
118
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700119#define PCI_D0 ((pci_power_t __force) 0)
120#define PCI_D1 ((pci_power_t __force) 1)
121#define PCI_D2 ((pci_power_t __force) 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122#define PCI_D3hot ((pci_power_t __force) 3)
123#define PCI_D3cold ((pci_power_t __force) 4)
Daniel Ritz3fe9d192005-08-17 15:32:19 -0700124#define PCI_UNKNOWN ((pci_power_t __force) 5)
Pavel Machek438510f2005-04-16 15:25:24 -0700125#define PCI_POWER_ERROR ((pci_power_t __force) -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Alan Stern00240c32009-04-27 13:33:16 -0400127/* Remember to update this when the list above changes! */
128extern const char *pci_power_names[];
129
130static inline const char *pci_power_name(pci_power_t state)
131{
132 return pci_power_names[1 + (int) state];
133}
134
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100135#define PCI_PM_D2_DELAY 200
136#define PCI_PM_D3_WAIT 10
137#define PCI_PM_BUS_WAIT 50
138
linas392a1ce2005-11-16 17:10:41 -0600139/** The pci_channel state describes connectivity between the CPU and
140 * the pci device. If some PCI bus between here and the pci device
141 * has crashed or locked up, this info is reflected here.
142 */
143typedef unsigned int __bitwise pci_channel_state_t;
144
145enum pci_channel_state {
146 /* I/O channel is in normal state */
147 pci_channel_io_normal = (__force pci_channel_state_t) 1,
148
149 /* I/O to channel is blocked */
150 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
151
152 /* PCI card is dead */
153 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
154};
155
Brian Kingf7bdd122007-04-06 16:39:36 -0500156typedef unsigned int __bitwise pcie_reset_state_t;
157
158enum pcie_reset_state {
159 /* Reset is NOT asserted (Use to deassert reset) */
160 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
161
162 /* Use #PERST to reset PCI-E device */
163 pcie_warm_reset = (__force pcie_reset_state_t) 2,
164
165 /* Use PCI-E Hot Reset to reset device */
166 pcie_hot_reset = (__force pcie_reset_state_t) 3
167};
168
David Millerba698ad2007-10-25 01:16:30 -0700169typedef unsigned short __bitwise pci_dev_flags_t;
170enum pci_dev_flags {
171 /* INTX_DISABLE in PCI_COMMAND register disables MSI
172 * generation too.
173 */
174 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
Alan Cox979b1792008-07-24 17:18:38 +0100175 /* Device configuration is irrevocably lost if disabled into D3 */
176 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
David Millerba698ad2007-10-25 01:16:30 -0700177};
178
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200179enum pci_irq_reroute_variant {
180 INTEL_IRQ_REROUTE_VARIANT = 1,
181 MAX_IRQ_REROUTE_VARIANTS = 3
182};
183
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200184typedef unsigned short __bitwise pci_bus_flags_t;
185enum pci_bus_flags {
Peter Orubad556ad42007-05-15 13:59:13 +0200186 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
187 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200188};
189
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500190/* Based on the PCI Hotplug Spec, but some values are made up by us */
191enum pci_bus_speed {
192 PCI_SPEED_33MHz = 0x00,
193 PCI_SPEED_66MHz = 0x01,
194 PCI_SPEED_66MHz_PCIX = 0x02,
195 PCI_SPEED_100MHz_PCIX = 0x03,
196 PCI_SPEED_133MHz_PCIX = 0x04,
197 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
198 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
199 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
200 PCI_SPEED_66MHz_PCIX_266 = 0x09,
201 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
202 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
Matthew Wilcox45b4cdd2009-12-13 08:11:34 -0500203 AGP_UNKNOWN = 0x0c,
204 AGP_1X = 0x0d,
205 AGP_2X = 0x0e,
206 AGP_4X = 0x0f,
207 AGP_8X = 0x10,
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500208 PCI_SPEED_66MHz_PCIX_533 = 0x11,
209 PCI_SPEED_100MHz_PCIX_533 = 0x12,
210 PCI_SPEED_133MHz_PCIX_533 = 0x13,
211 PCIE_SPEED_2_5GT = 0x14,
212 PCIE_SPEED_5_0GT = 0x15,
Matthew Wilcox9dfd97f2009-12-13 08:11:35 -0500213 PCIE_SPEED_8_0GT = 0x16,
Matthew Wilcox536c8cb2009-12-13 08:11:31 -0500214 PCI_SPEED_UNKNOWN = 0xff,
215};
216
Alex Williamson24a47422011-05-10 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 Williamson24a47422011-05-10 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 Barnesee694392008-04-28 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 Barnesee694392008-04-28 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 */
Keshavamurthy, Anil S994a65e2007-10-21 16:41:46 -0700254 u8 pcie_type; /* PCI-E device/port type */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 u8 rom_base_reg; /* which config register controls the ROM */
Kristen Accardiffeff782005-11-02 16:24:32 -0800256 u8 pin; /* which interrupt pin this device uses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
258 struct pci_driver *driver; /* which driver has allocated this device */
259 u64 dma_mask; /* Mask of the bits of bus address this
260 device implements. Normally this is
261 0xffffffff. You only need to change
262 this if your device has broken DMA
263 or supports 64-bit transfers. */
264
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800265 struct device_dma_parameters dma_parms;
266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 pci_power_t current_state; /* Current operating state. In ACPI-speak,
268 this is D0-D3, D0 being fully functional,
269 and D3 being off. */
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200270 int pm_cap; /* PM capability offset in the
271 configuration space */
272 unsigned int pme_support:5; /* Bitmask of states from which PME#
273 can be generated */
Rafael J. Wysockic7f48652010-02-17 23:39:08 +0100274 unsigned int pme_interrupt:1;
Rafael J. Wysocki337001b2008-07-07 03:36:24 +0200275 unsigned int d1_support:1; /* Low power state D1 is supported */
276 unsigned int d2_support:1; /* Low power state D2 is supported */
277 unsigned int no_d1d2:1; /* Only allow D0 and D3 */
Jacob Pan253d2e52010-07-16 10:19:22 -0700278 unsigned int mmio_always_on:1; /* disallow turning off io/mem
279 decoding during bar sizing */
Rafael J. Wysockie80bb092009-09-08 23:14:49 +0200280 unsigned int wakeup_prepared:1;
Rafael J. Wysocki1ae861e2009-12-31 12:15:54 +0100281 unsigned int d3_delay; /* D3->D0 transition time in ms */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
Shaohua Li7d715a62008-02-25 09:46:41 +0800283#ifdef CONFIG_PCIEASPM
284 struct pcie_link_state *link_state; /* ASPM link state. */
285#endif
286
linas392a1ce2005-11-16 17:10:41 -0600287 pci_channel_state_t error_state; /* current connectivity state */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 struct device dev; /* Generic device interface */
289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 int cfg_size; /* Size of configuration space */
291
292 /*
293 * Instead of touching interrupt line and base address registers
294 * directly, use the values stored here. They might be different!
295 */
296 unsigned int irq;
297 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
Bjorn Helgaas58c84ed2010-07-15 09:41:42 -0600298 resource_size_t fw_addr[DEVICE_COUNT_RESOURCE]; /* FW-assigned addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
300 /* These fields are used by common fixups */
301 unsigned int transparent:1; /* Transparent PCI bridge */
302 unsigned int multifunction:1;/* Part of multi-function device */
303 /* keep track of device state */
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -0800304 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 unsigned int is_busmaster:1; /* device is busmaster */
Kristen Accardi4602b882005-08-16 15:15:58 -0700306 unsigned int no_msi:1; /* device may not use msi */
Brian Kinge04b0ea2005-09-27 01:21:55 -0700307 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
Doug Thompsonbd8481e2006-05-08 17:06:09 -0700308 unsigned int broken_parity_status:1; /* Device generates false positive parity */
Stefan Assmanne1d3a902008-06-11 16:35:17 +0200309 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
Shaohua Li99dc8042006-05-26 10:58:27 +0800310 unsigned int msi_enabled:1;
311 unsigned int msix_enabled:1;
Yu Zhao58c3a722008-10-14 14:02:53 +0800312 unsigned int ari_enabled:1; /* ARI forwarding */
Tejun Heo9ac78492007-01-20 16:00:26 +0900313 unsigned int is_managed:1;
Kenji Kaneshige6d3be842010-02-09 12:21:27 +0900314 unsigned int is_pcie:1; /* Obsolete. Will be removed.
315 Use pci_is_pcie() instead */
Mike Mason260d7032009-07-30 15:33:21 -0700316 unsigned int needs_freset:1; /* Dev requires fundamental reset */
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100317 unsigned int state_saved:1;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800318 unsigned int is_physfn:1;
Yu Zhaodd7cc442009-03-20 11:25:15 +0800319 unsigned int is_virtfn:1;
Michael S. Tsirkin711d5772009-07-27 23:37:48 +0300320 unsigned int reset_fn:1;
Eric W. Biederman28760482009-09-09 14:09:24 -0700321 unsigned int is_hotplug_bridge:1;
Huang Yingaffb72c2010-05-18 14:35:16 +0800322 unsigned int __aer_firmware_first_valid:1;
323 unsigned int __aer_firmware_first:1;
David Millerba698ad2007-10-25 01:16:30 -0700324 pci_dev_flags_t dev_flags;
Inaky Perez-Gonzalezbae94d02006-11-22 12:40:31 -0800325 atomic_t enable_cnt; /* pci_enable_device has been called */
Kristen Accardi4602b882005-08-16 15:15:58 -0700326
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 u32 saved_config_space[16]; /* config space saved at suspend time */
Shaohua Li41017f02006-02-08 17:11:38 +0800328 struct hlist_head saved_cap_space;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
330 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
331 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
venkatesh.pallipadi@intel.com45aec1a2008-03-18 17:00:22 -0700332 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700333#ifdef CONFIG_PCI_MSI
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000334 struct list_head msi_list;
Eric W. Biedermanded86d82007-01-28 12:42:52 -0700335#endif
Ben Hutchings94e61082008-03-05 16:52:39 +0000336 struct pci_vpd *vpd;
Yu Zhaod1b054d2009-03-20 11:25:11 +0800337#ifdef CONFIG_PCI_IOV
Yu Zhaodd7cc442009-03-20 11:25:15 +0800338 union {
339 struct pci_sriov *sriov; /* SR-IOV capability related */
340 struct pci_dev *physfn; /* the PF this VF is associated with */
341 };
Yu Zhao302b4212009-05-18 13:51:32 +0800342 struct pci_ats *ats; /* Address Translation Service */
Yu Zhaod1b054d2009-03-20 11:25:11 +0800343#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344};
345
Yinghaidda56542010-04-09 01:07:55 +0100346static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
347{
348#ifdef CONFIG_PCI_IOV
349 if (dev->is_virtfn)
350 dev = dev->physfn;
351#endif
352
353 return dev;
354}
355
Michael Ellerman65891212007-04-05 17:19:08 +1000356extern struct pci_dev *alloc_pci_dev(void);
357
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358#define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
359#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
360#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
361
Linas Vepstasa7369f12006-12-12 16:55:59 -0600362static inline int pci_channel_offline(struct pci_dev *pdev)
363{
364 return (pdev->error_state != pci_channel_io_normal);
365}
366
Shaohua Li41017f02006-02-08 17:11:38 +0800367static inline struct pci_cap_saved_state *pci_find_saved_cap(
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800368 struct pci_dev *pci_dev, char cap)
Shaohua Li41017f02006-02-08 17:11:38 +0800369{
370 struct pci_cap_saved_state *tmp;
371 struct hlist_node *pos;
372
373 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
Alex Williamson24a47422011-05-10 10:02:11 -0600374 if (tmp->cap.cap_nr == cap)
Shaohua Li41017f02006-02-08 17:11:38 +0800375 return tmp;
376 }
377 return NULL;
378}
379
380static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
381 struct pci_cap_saved_state *new_cap)
382{
383 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
384}
385
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700386/*
387 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
388 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
389 * buses below host bridges or subtractive decode bridges) go in the list.
390 * Use pci_bus_for_each_resource() to iterate through all the resources.
391 */
392
393/*
394 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
395 * and there's no way to program the bridge with the details of the window.
396 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
397 * decode bit set, because they are explicit and can be programmed with _SRS.
398 */
399#define PCI_SUBTRACTIVE_DECODE 0x1
400
401struct pci_bus_resource {
402 struct list_head list;
403 struct resource *res;
404 unsigned int flags;
405};
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700406
407#define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
409struct pci_bus {
410 struct list_head node; /* node in list of buses */
411 struct pci_bus *parent; /* parent bus this bridge is on */
412 struct list_head children; /* list of child buses */
413 struct list_head devices; /* list of devices on this bus */
414 struct pci_dev *self; /* bridge device as seen by parent */
Alex Chiangf46753c2008-06-10 15:28:50 -0600415 struct list_head slots; /* list of slots on this bus */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700416 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
417 struct list_head resources; /* address space routed to this bus */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
419 struct pci_ops *ops; /* configuration access functions */
420 void *sysdata; /* hook for sys-specific extension */
421 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
422
423 unsigned char number; /* bus number */
424 unsigned char primary; /* number of primary bridge */
425 unsigned char secondary; /* number of secondary bridge */
426 unsigned char subordinate; /* max number of subordinate buses */
Matthew Wilcox3749c512009-12-13 08:11:32 -0500427 unsigned char max_bus_speed; /* enum pci_bus_speed */
428 unsigned char cur_bus_speed; /* enum pci_bus_speed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
430 char name[48];
431
432 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
Michael S. Tsirkin6e325a62006-02-14 18:52:22 +0200433 pci_bus_flags_t bus_flags; /* Inherited by child busses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 struct device *bridge;
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400435 struct device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
437 struct bin_attribute *legacy_mem; /* legacy mem */
Greg Kroah-Hartmancc74d962008-03-12 21:48:03 -0700438 unsigned int is_added:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439};
440
441#define pci_bus_b(n) list_entry(n, struct pci_bus, node)
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -0400442#define to_pci_bus(n) container_of(n, struct pci_bus, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Kenji Kaneshige79af72d2009-03-20 14:55:55 -0600444/*
445 * Returns true if the pci bus is root (behind host-pci bridge),
446 * false otherwise
447 */
448static inline bool pci_is_root_bus(struct pci_bus *pbus)
449{
450 return !(pbus->parent);
451}
452
Rafael J. Wysocki16cf0eb2009-01-05 14:50:27 +0100453#ifdef CONFIG_PCI_MSI
454static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
455{
456 return pci_dev->msi_enabled || pci_dev->msix_enabled;
457}
458#else
459static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
460#endif
461
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462/*
463 * Error values that may be returned by PCI functions.
464 */
465#define PCIBIOS_SUCCESSFUL 0x00
466#define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
467#define PCIBIOS_BAD_VENDOR_ID 0x83
468#define PCIBIOS_DEVICE_NOT_FOUND 0x86
469#define PCIBIOS_BAD_REGISTER_NUMBER 0x87
470#define PCIBIOS_SET_FAILED 0x88
471#define PCIBIOS_BUFFER_TOO_SMALL 0x89
472
473/* Low-level architecture-dependent routines */
474
475struct pci_ops {
476 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
477 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
478};
479
Matthew Wilcoxb6ce0682008-02-10 09:45:28 -0500480/*
481 * ACPI needs to be able to access PCI config space before we've done a
482 * PCI bus scan and created pci_bus structures.
483 */
484extern int raw_pci_read(unsigned int domain, unsigned int bus,
485 unsigned int devfn, int reg, int len, u32 *val);
486extern int raw_pci_write(unsigned int domain, unsigned int bus,
487 unsigned int devfn, int reg, int len, u32 val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
489struct pci_bus_region {
Benjamin Herrenschmidtc40a22e2007-12-10 17:32:15 +1100490 resource_size_t start;
491 resource_size_t end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492};
493
494struct pci_dynids {
495 spinlock_t lock; /* protects list, index */
496 struct list_head list; /* for IDs added at runtime */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497};
498
linas392a1ce2005-11-16 17:10:41 -0600499/* ---------------------------------------------------------------- */
500/** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
Rolf Eike Beer579082d2007-07-10 13:35:05 +0200501 * a set of callbacks in struct pci_error_handlers, then that device driver
linas392a1ce2005-11-16 17:10:41 -0600502 * will be notified of PCI bus errors, and will be driven to recovery
503 * when an error occurs.
504 */
505
506typedef unsigned int __bitwise pci_ers_result_t;
507
508enum pci_ers_result {
509 /* no result/none/not supported in device driver */
510 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
511
512 /* Device driver can recover without slot reset */
513 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
514
515 /* Device driver wants slot to be reset. */
516 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
517
518 /* Device has completely failed, is unrecoverable */
519 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
520
521 /* Device driver is fully recovered and operational */
522 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
523};
524
525/* PCI bus error event callbacks */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800526struct pci_error_handlers {
linas392a1ce2005-11-16 17:10:41 -0600527 /* PCI bus error detected on this device */
528 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800529 enum pci_channel_state error);
linas392a1ce2005-11-16 17:10:41 -0600530
531 /* MMIO has been re-enabled, but not DMA */
532 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
533
534 /* PCI Express link has been reset */
535 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
536
537 /* PCI slot has been reset */
538 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
539
540 /* Device driver may resume normal operations */
541 void (*resume)(struct pci_dev *dev);
542};
543
544/* ---------------------------------------------------------------- */
545
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546struct module;
547struct pci_driver {
548 struct list_head node;
Stephen Hemminger42b21932010-09-02 14:28:51 -0700549 const char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
551 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
552 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
553 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700554 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
555 int (*resume_early) (struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 int (*resume) (struct pci_dev *dev); /* Device woken up */
Greg KHc8958172005-04-08 14:53:31 +0900557 void (*shutdown) (struct pci_dev *dev);
linas392a1ce2005-11-16 17:10:41 -0600558 struct pci_error_handlers *err_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 struct device_driver driver;
560 struct pci_dynids dynids;
561};
562
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800563#define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565/**
Andrew Morton9f9351b2008-03-10 11:43:34 -0700566 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100567 * @_table: device table name
568 *
569 * This macro is used to create a struct pci_device_id array (a device table)
570 * in a generic manner.
571 */
Andrew Morton9f9351b2008-03-10 11:43:34 -0700572#define DEFINE_PCI_DEVICE_TABLE(_table) \
Jonas Bonn90a1ba02008-02-22 11:02:21 +0100573 const struct pci_device_id _table[] __devinitconst
574
575/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 * PCI_DEVICE - macro used to describe a specific pci device
577 * @vend: the 16 bit PCI Vendor ID
578 * @dev: the 16 bit PCI Device ID
579 *
580 * This macro is used to create a struct pci_device_id that matches a
581 * specific device. The subvendor and subdevice fields will be set to
582 * PCI_ANY_ID.
583 */
584#define PCI_DEVICE(vend,dev) \
585 .vendor = (vend), .device = (dev), \
586 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
587
588/**
589 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
590 * @dev_class: the class, subclass, prog-if triple for this device
591 * @dev_class_mask: the class mask for this device
592 *
593 * This macro is used to create a struct pci_device_id that matches a
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -0700594 * specific PCI class. The vendor, device, subvendor, and subdevice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 * fields will be set to PCI_ANY_ID.
596 */
597#define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
598 .class = (dev_class), .class_mask = (dev_class_mask), \
599 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
600 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
601
Alan Cox1597cac2006-12-04 15:14:45 -0800602/**
603 * PCI_VDEVICE - macro used to describe a specific pci device in short form
Zhao, Yuc322b282008-10-13 19:36:05 +0800604 * @vendor: the vendor name
605 * @device: the 16 bit PCI Device ID
Alan Cox1597cac2006-12-04 15:14:45 -0800606 *
607 * This macro is used to create a struct pci_device_id that matches a
608 * specific PCI device. The subvendor, and subdevice fields will be set
609 * to PCI_ANY_ID. The macro allows the next field to follow as the device
610 * private data.
611 */
612
613#define PCI_VDEVICE(vendor, device) \
614 PCI_VENDOR_ID_##vendor, (device), \
615 PCI_ANY_ID, PCI_ANY_ID, 0, 0
616
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617/* these external functions are only available when PCI support is enabled */
618#ifdef CONFIG_PCI
619
620extern struct bus_type pci_bus_type;
621
622/* Do NOT directly access these two variables, unless you are arch specific pci
623 * code, or pci core code. */
624extern struct list_head pci_root_buses; /* list of all known PCI buses */
Zhang, Yanmined4aaad2007-07-15 23:39:39 -0700625/* Some device drivers need know if pci is initiated */
626extern int no_pci_devices(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
628void pcibios_fixup_bus(struct pci_bus *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700629int __must_check pcibios_enable_device(struct pci_dev *, int mask);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800630char *pcibios_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
632/* Used only when drivers/pci/setup.c is used */
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100633resource_size_t pcibios_align_resource(void *, const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100634 resource_size_t,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -0700635 resource_size_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636void pcibios_update_irq(struct pci_dev *, int irq);
637
Benjamin Herrenschmidt2d1c8612009-12-09 17:52:13 +1100638/* Weak but can be overriden by arch */
639void pci_fixup_cardbus(struct pci_bus *);
640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641/* Generic PCI functions used internally */
642
Mauro Carvalho Chehabd1fd4fb2009-07-10 18:39:53 -0300643void pcibios_scan_specific_bus(int busn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644extern struct pci_bus *pci_find_bus(int domain, int busnr);
akpm@linux-foundation.orgc48f1672009-02-03 15:45:26 -0800645void pci_bus_add_devices(const struct pci_bus *bus);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800646struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
647 struct pci_ops *ops, void *sysdata);
Sam Ravnborg98db6f12008-04-29 22:38:48 +0200648static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800649 void *sysdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650{
Rajesh Shahc431ada2005-04-28 00:25:45 -0700651 struct pci_bus *root_bus;
652 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
653 if (root_bus)
654 pci_bus_add_devices(root_bus);
655 return root_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800657struct pci_bus *pci_create_bus(struct device *parent, int bus,
658 struct pci_ops *ops, void *sysdata);
659struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
660 int busnr);
Matthew Wilcox3749c512009-12-13 08:11:32 -0500661void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
Alex Chiangf46753c2008-06-10 15:28:50 -0600662struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
Alex Chiang828f3762008-10-20 17:40:52 -0600663 const char *name,
664 struct hotplug_slot *hotplug);
Alex Chiangf46753c2008-06-10 15:28:50 -0600665void pci_destroy_slot(struct pci_slot *slot);
Alex Chiangd25b7c82008-10-20 17:40:47 -0600666void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667int pci_scan_slot(struct pci_bus *bus, int devfn);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800668struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
Paul Mackerrascdb9b9f2005-09-06 09:31:03 +1000669void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670unsigned int pci_scan_child_bus(struct pci_bus *bus);
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700671int __must_check pci_bus_add_device(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672void pci_read_bridge_bases(struct pci_bus *child);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800673struct resource *pci_find_parent_resource(const struct pci_dev *dev,
674 struct resource *res);
Bjorn Helgaas57c2cf72008-12-11 11:24:23 -0700675u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
Bjorn Helgaas68feac82008-12-16 21:36:55 -0700677u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
679extern void pci_dev_put(struct pci_dev *dev);
680extern void pci_remove_bus(struct pci_bus *b);
681extern void pci_remove_bus_device(struct pci_dev *dev);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700682extern void pci_stop_bus_device(struct pci_dev *dev);
Dominik Brodowskib3743fa2005-09-09 13:03:23 -0700683void pci_setup_cardbus(struct pci_bus *bus);
Matt Domsch6b4b78f2006-09-29 15:23:23 -0500684extern void pci_sort_breadthfirst(void);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +0000685#define dev_is_pci(d) ((d)->bus == &pci_bus_type)
686#define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
687#define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
689/* Generic PCI functions exported to card drivers */
690
James Bottomley388c8c12008-08-03 13:02:12 -0500691enum pci_lost_interrupt_reason {
692 PCI_LOST_IRQ_NO_INFORMATION = 0,
693 PCI_LOST_IRQ_DISABLE_MSI,
694 PCI_LOST_IRQ_DISABLE_MSIX,
695 PCI_LOST_IRQ_DISABLE_ACPI,
696};
697enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800698int pci_find_capability(struct pci_dev *dev, int cap);
699int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
700int pci_find_ext_capability(struct pci_dev *dev, int cap);
Jesse Barnescf4c43d2009-07-15 13:13:00 -0700701int pci_bus_find_ext_capability(struct pci_bus *bus, unsigned int devfn,
702 int cap);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800703int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
704int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
Alan Cox29f3eb62006-10-16 16:20:21 -0700705struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Andrew Mortond42552c2006-10-21 10:24:12 -0700707struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
708 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800709struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 unsigned int ss_vendor, unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -0700711 struct pci_dev *from);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800712struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
Andrew Patterson3c299dc2009-10-12 13:14:00 -0600713struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
714 unsigned int devfn);
715static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
716 unsigned int devfn)
717{
718 return pci_get_domain_bus_and_slot(0, bus, devfn);
719}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800720struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721int pci_dev_present(const struct pci_device_id *ids);
722
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800723int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
724 int where, u8 *val);
725int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
726 int where, u16 *val);
727int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
728 int where, u32 *val);
729int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
730 int where, u8 val);
731int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
732 int where, u16 val);
733int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
734 int where, u32 val);
Huang Yinga72b46c2009-04-24 10:45:17 +0800735struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736
737static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
738{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800739 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740}
741static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
742{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800743 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800745static inline int pci_read_config_dword(struct pci_dev *dev, int where,
746 u32 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800748 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749}
750static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
751{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800752 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753}
754static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
755{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800756 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800758static inline int pci_write_config_dword(struct pci_dev *dev, int where,
759 u32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760{
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800761 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762}
763
Andrew Morton4a7fb632006-08-14 22:43:17 -0700764int __must_check pci_enable_device(struct pci_dev *dev);
Benjamin Herrenschmidtb7189892007-12-20 15:28:08 +1100765int __must_check pci_enable_device_io(struct pci_dev *dev);
766int __must_check pci_enable_device_mem(struct pci_dev *dev);
Tejun Heo0b62e132007-07-27 14:43:35 +0900767int __must_check pci_reenable_device(struct pci_dev *);
Tejun Heo9ac78492007-01-20 16:00:26 +0900768int __must_check pcim_enable_device(struct pci_dev *pdev);
769void pcim_pin_device(struct pci_dev *pdev);
770
Yuji Shimada296ccb02009-04-03 16:41:46 +0900771static inline int pci_is_enabled(struct pci_dev *pdev)
772{
773 return (atomic_read(&pdev->enable_cnt) > 0);
774}
775
Tejun Heo9ac78492007-01-20 16:00:26 +0900776static inline int pci_is_managed(struct pci_dev *pdev)
777{
778 return pdev->is_managed;
779}
780
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781void pci_disable_device(struct pci_dev *dev);
782void pci_set_master(struct pci_dev *dev);
Ben Hutchings6a479072008-12-23 03:08:29 +0000783void pci_clear_master(struct pci_dev *dev);
Brian Kingf7bdd122007-04-06 16:39:36 -0500784int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
Tejun Heo15ea76d2009-09-22 17:34:48 +0900785int pci_set_cacheline_size(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786#define HAVE_PCI_SET_MWI
Andrew Morton4a7fb632006-08-14 22:43:17 -0700787int __must_check pci_set_mwi(struct pci_dev *dev);
Randy Dunlap694625c2007-07-09 11:55:54 -0700788int pci_try_set_mwi(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789void pci_clear_mwi(struct pci_dev *dev);
Brett M Russa04ce0f2005-08-15 15:23:41 -0400790void pci_intx(struct pci_dev *dev, int enable);
Eric W. Biedermanf5f2b132007-03-05 00:30:07 -0800791void pci_msi_off(struct pci_dev *dev);
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -0800792int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -0800793int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
Peter Orubad556ad42007-05-15 13:59:13 +0200794int pcix_get_max_mmrbc(struct pci_dev *dev);
795int pcix_get_mmrbc(struct pci_dev *dev);
796int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
Brice Goglin2637e5b2007-08-14 12:43:48 +0200797int pcie_get_readrq(struct pci_dev *dev);
Peter Orubad556ad42007-05-15 13:59:13 +0200798int pcie_set_readrq(struct pci_dev *dev, int rq);
Yu Zhao8c1c6992009-06-13 15:52:13 +0800799int __pci_reset_function(struct pci_dev *dev);
Sheng Yang8dd7f802008-10-21 17:38:25 +0800800int pci_reset_function(struct pci_dev *dev);
Yu Zhao14add802008-11-22 02:38:52 +0800801void pci_update_resource(struct pci_dev *dev, int resno);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700802int __must_check pci_assign_resource(struct pci_dev *dev, int i);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900803int pci_select_bars(struct pci_dev *dev, unsigned long flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804
805/* ROM control related routines */
Alan Coxe416de52008-09-23 17:25:10 +0100806int pci_enable_rom(struct pci_dev *pdev);
807void pci_disable_rom(struct pci_dev *pdev);
Dave Jones144a50e2005-08-09 00:20:10 -0400808void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
Timothy S. Nelson97c44832009-01-30 06:12:47 +1100810size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
812/* Power management related routines */
813int pci_save_state(struct pci_dev *dev);
Jon Mason1d3c16a2010-11-30 17:43:26 -0600814void pci_restore_state(struct pci_dev *dev);
Alex Williamsonffbdd3f2011-05-10 10:02:27 -0600815struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
816int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state);
817int pci_load_and_free_saved_state(struct pci_dev *dev,
818 struct pci_saved_state **state);
Rafael J. Wysocki0e5dd462009-03-26 22:51:40 +0100819int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
Linus Torvalds9c8550e2005-09-09 15:43:46 -0700820int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
821pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200822bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
Rafael J. Wysocki5a6c9b62008-08-08 00:14:24 +0200823void pci_pme_active(struct pci_dev *dev, bool enable);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100824int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
825 bool runtime, bool enable);
Rafael J. Wysocki0235c4f2008-08-18 21:38:00 +0200826int pci_wake_from_d3(struct pci_dev *dev, bool enable);
Rafael J. Wysockie5899e12008-07-19 14:39:24 +0200827pci_power_t pci_target_state(struct pci_dev *dev);
Rafael J. Wysocki404cc2d2008-07-07 03:35:26 +0200828int pci_prepare_to_sleep(struct pci_dev *dev);
829int pci_back_from_sleep(struct pci_dev *dev);
Rafael J. Wysockib67ea762010-02-17 23:44:09 +0100830bool pci_dev_run_wake(struct pci_dev *dev);
Matthew Garrettbf4d2902010-10-04 14:22:26 -0400831bool pci_check_pme_status(struct pci_dev *dev);
Matthew Garrettbf4d2902010-10-04 14:22:26 -0400832void pci_pme_wakeup_bus(struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100834static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
835 bool enable)
836{
837 return __pci_enable_wake(dev, state, false, enable);
838}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
Jesse Barnesb48d4422010-10-19 13:07:57 -0700840#define PCI_EXP_IDO_REQUEST (1<<0)
841#define PCI_EXP_IDO_COMPLETION (1<<1)
842void pci_enable_ido(struct pci_dev *dev, unsigned long type);
843void pci_disable_ido(struct pci_dev *dev, unsigned long type);
844
Jesse Barnes48a92a82011-01-10 12:46:36 -0800845enum pci_obff_signal_type {
846 PCI_EXP_OBFF_SIGNAL_L0,
847 PCI_EXP_OBFF_SIGNAL_ALWAYS,
848};
849int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type);
850void pci_disable_obff(struct pci_dev *dev);
851
Jesse Barnes51c2e0a2011-01-14 08:53:04 -0800852bool pci_ltr_supported(struct pci_dev *dev);
853int pci_enable_ltr(struct pci_dev *dev);
854void pci_disable_ltr(struct pci_dev *dev);
855int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns);
856
Benjamin Herrenschmidtbb209c82010-01-26 17:10:03 +0000857/* For use by arch with custom probe code */
858void set_pcie_port_type(struct pci_dev *pdev);
859void set_pcie_hotplug_bridge(struct pci_dev *pdev);
860
Kumar Galace5ccde2007-07-16 23:27:10 -0500861/* Functions for PCI Hotplug drivers to use */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800862int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
Alex Chiang3ed4fd92009-03-20 14:56:25 -0600863#ifdef CONFIG_HOTPLUG
864unsigned int pci_rescan_bus(struct pci_bus *bus);
865#endif
Kumar Galace5ccde2007-07-16 23:27:10 -0500866
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800867/* Vital product data routines */
868ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
869ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
Stephen Hemmingerdb567942008-12-18 09:17:16 -0800870int pci_vpd_truncate(struct pci_dev *dev, size_t size);
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
Andrew Mortonea741552009-02-18 10:44:29 -0800873void pci_bus_assign_resources(const struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874void pci_bus_size_bridges(struct pci_bus *bus);
875int pci_claim_resource(struct pci_dev *, int);
876void pci_assign_unassigned_resources(void);
Yinghai Lu6841ec62010-01-22 01:02:25 -0800877void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878void pdev_enable_device(struct pci_dev *);
879void pdev_sort_resources(struct pci_dev *, struct resource_list *);
Bjorn Helgaas842de402008-03-04 11:56:47 -0700880int pci_enable_resources(struct pci_dev *, int mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
882 int (*)(struct pci_dev *, u8, u8));
883#define HAVE_PCI_REQ_REGIONS 2
Andrew Morton4a7fb632006-08-14 22:43:17 -0700884int __must_check pci_request_regions(struct pci_dev *, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700885int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886void pci_release_regions(struct pci_dev *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700887int __must_check pci_request_region(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700888int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889void pci_release_region(struct pci_dev *, int);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900890int pci_request_selected_regions(struct pci_dev *, int, const char *);
Arjan van de Vene8de1482008-10-22 19:55:31 -0700891int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
Hidetoshi Setoc87deff2006-12-18 10:31:06 +0900892void pci_release_selected_regions(struct pci_dev *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893
894/* drivers/pci/bus.c */
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700895void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
896struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
897void pci_bus_remove_resources(struct pci_bus *bus);
898
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700899#define pci_bus_for_each_resource(bus, res, i) \
Bjorn Helgaas2fe2abf2010-02-23 10:24:36 -0700900 for (i = 0; \
901 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
902 i++)
Bjorn Helgaas89a74ec2010-02-23 10:24:31 -0700903
Andrew Morton4a7fb632006-08-14 22:43:17 -0700904int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
905 struct resource *res, resource_size_t size,
906 resource_size_t align, resource_size_t min,
907 unsigned int type_mask,
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100908 resource_size_t (*alignf)(void *,
909 const struct resource *,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100910 resource_size_t,
911 resource_size_t),
Andrew Morton4a7fb632006-08-14 22:43:17 -0700912 void *alignf_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913void pci_enable_bridges(struct pci_bus *bus);
914
Laurent riffard863b18f2005-10-27 23:12:54 +0200915/* Proper probing supporting hot-pluggable devices */
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -0800916int __must_check __pci_register_driver(struct pci_driver *, struct module *,
917 const char *mod_name);
Andrew Mortonbba81162008-07-30 12:07:04 -0700918
919/*
920 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
921 */
922#define pci_register_driver(driver) \
923 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
Laurent riffard863b18f2005-10-27 23:12:54 +0200924
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800925void pci_unregister_driver(struct pci_driver *dev);
926void pci_remove_behind_bridge(struct pci_dev *dev);
927struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
Tejun Heo9dba9102009-09-03 15:26:36 +0900928int pci_add_dynid(struct pci_driver *drv,
929 unsigned int vendor, unsigned int device,
930 unsigned int subvendor, unsigned int subdevice,
931 unsigned int class, unsigned int class_mask,
932 unsigned long driver_data);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800933const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
934 struct pci_dev *dev);
935int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
936 int pass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937
Zhang, Yanmin70298c62009-06-16 13:34:38 +0800938void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
Paul Mackerrascecf4862005-08-18 14:33:01 +1000939 void *userdata);
Yinghai Lu70b9f7d2008-04-28 16:27:23 -0700940int pci_cfg_space_size_ext(struct pci_dev *dev);
Benjamin Herrenschmidtac7dc652005-12-13 18:09:16 +1100941int pci_cfg_space_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800942unsigned char pci_bus_max_busnr(struct pci_bus *bus);
Paul Mackerrascecf4862005-08-18 14:33:01 +1000943
Dave Airlie3448a192010-06-01 15:32:24 +1000944#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
945#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
946
Benjamin Herrenschmidtdeb2d2e2009-08-11 15:52:06 +1000947int pci_set_vga_state(struct pci_dev *pdev, bool decode,
Dave Airlie3448a192010-06-01 15:32:24 +1000948 unsigned int command_bits, u32 flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949/* kmem_cache style wrapper around pci_alloc_consistent() */
950
FUJITA Tomonorif41b1772010-03-10 15:23:30 -0800951#include <linux/pci-dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952#include <linux/dmapool.h>
953
954#define pci_pool dma_pool
955#define pci_pool_create(name, pdev, size, align, allocation) \
956 dma_pool_create(name, &pdev->dev, size, align, allocation)
957#define pci_pool_destroy(pool) dma_pool_destroy(pool)
958#define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
959#define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
960
David S. Millere24c2d92005-06-02 12:55:50 -0700961enum pci_dma_burst_strategy {
962 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
963 strategy_parameter is N/A */
964 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
965 byte boundaries */
966 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
967 strategy_parameter byte boundaries */
968};
969
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970struct msix_entry {
Yinghai Lu16dbef42008-08-15 19:36:45 -0700971 u32 vector; /* kernel uses to write allocated vector */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 u16 entry; /* driver uses to specify entry, OS writes */
973};
974
Eric W. Biederman0366f8f2006-10-04 02:16:33 -0700975
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976#ifndef CONFIG_PCI_MSI
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -0400977static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800978{
979 return -1;
980}
981
Yinghai Lud52877c2008-04-23 14:58:09 -0700982static inline void pci_msi_shutdown(struct pci_dev *dev)
983{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800984static inline void pci_disable_msi(struct pci_dev *dev)
985{ }
986
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +0100987static inline int pci_msix_table_size(struct pci_dev *dev)
988{
989 return 0;
990}
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800991static inline int pci_enable_msix(struct pci_dev *dev,
992 struct msix_entry *entries, int nvec)
993{
994 return -1;
995}
996
Yinghai Lud52877c2008-04-23 14:58:09 -0700997static inline void pci_msix_shutdown(struct pci_dev *dev)
998{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -0800999static inline void pci_disable_msix(struct pci_dev *dev)
1000{ }
1001
1002static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
1003{ }
1004
1005static inline void pci_restore_msi_state(struct pci_dev *dev)
1006{ }
Andrew Patterson07ae95f2008-11-10 15:31:05 -07001007static inline int pci_msi_enabled(void)
1008{
1009 return 0;
1010}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011#else
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001012extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -07001013extern void pci_msi_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014extern void pci_disable_msi(struct pci_dev *dev);
Rafael J. Wysockia52e2e32009-01-24 00:21:14 +01001015extern int pci_msix_table_size(struct pci_dev *dev);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001016extern int pci_enable_msix(struct pci_dev *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 struct msix_entry *entries, int nvec);
Yinghai Lud52877c2008-04-23 14:58:09 -07001018extern void pci_msix_shutdown(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019extern void pci_disable_msix(struct pci_dev *dev);
1020extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
Linas Vepstas94688cf2007-11-07 15:43:59 -06001021extern void pci_restore_msi_state(struct pci_dev *dev);
Andrew Patterson07ae95f2008-11-10 15:31:05 -07001022extern int pci_msi_enabled(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023#endif
1024
Markus Trippelsdorfab0724f2011-01-15 00:07:22 +01001025#ifdef CONFIG_PCIEPORTBUS
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001026extern bool pcie_ports_disabled;
1027extern bool pcie_ports_auto;
Markus Trippelsdorfab0724f2011-01-15 00:07:22 +01001028#else
1029#define pcie_ports_disabled true
1030#define pcie_ports_auto false
1031#endif
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001032
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001033#ifndef CONFIG_PCIEASPM
Rafael J. Wysocki8b8bae92011-03-05 13:21:51 +01001034static inline int pcie_aspm_enabled(void) { return 0; }
1035static inline bool pcie_aspm_support_enabled(void) { return false; }
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001036#else
1037extern int pcie_aspm_enabled(void);
Rafael J. Wysocki8b8bae92011-03-05 13:21:51 +01001038extern bool pcie_aspm_support_enabled(void);
Andrew Patterson3e1b1602008-11-10 15:30:55 -07001039#endif
1040
Rafael J. Wysocki415e12b2011-01-07 00:55:09 +01001041#ifdef CONFIG_PCIEAER
1042void pci_no_aer(void);
1043bool pci_aer_available(void);
1044#else
1045static inline void pci_no_aer(void) { }
1046static inline bool pci_aer_available(void) { return false; }
1047#endif
1048
Andrew Patterson43c16402009-04-22 16:52:09 -06001049#ifndef CONFIG_PCIE_ECRC
1050static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
1051{
1052 return;
1053}
1054static inline void pcie_ecrc_get_policy(char *str) {};
1055#else
1056extern void pcie_set_ecrc_checking(struct pci_dev *dev);
1057extern void pcie_ecrc_get_policy(char *str);
1058#endif
1059
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -04001060#define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
1061
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001062#ifdef CONFIG_HT_IRQ
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001063/* The functions a driver should call */
1064int ht_create_irq(struct pci_dev *dev, int idx);
1065void ht_destroy_irq(unsigned int irq);
Eric W. Biederman8b955b02006-10-04 02:16:55 -07001066#endif /* CONFIG_HT_IRQ */
1067
Brian Kinge04b0ea2005-09-27 01:21:55 -07001068extern void pci_block_user_cfg_access(struct pci_dev *dev);
1069extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
1070
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001071/*
1072 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1073 * a PCI domain is defined to be a set of PCI busses which share
1074 * configuration space.
1075 */
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001076#ifdef CONFIG_PCI_DOMAINS
1077extern int pci_domains_supported;
1078#else
1079enum { pci_domains_supported = 0 };
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001080static inline int pci_domain_nr(struct pci_bus *bus)
1081{
1082 return 0;
1083}
1084
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001085static inline int pci_proc_domain(struct pci_bus *bus)
1086{
1087 return 0;
1088}
Jeff Garzik32a2eea2007-10-11 16:57:27 -04001089#endif /* CONFIG_PCI_DOMAINS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090
Mike Travis95a8b6e2010-02-02 14:38:13 -08001091/* some architectures require additional setup to direct VGA traffic */
1092typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
Dave Airlie3448a192010-06-01 15:32:24 +10001093 unsigned int command_bits, u32 flags);
Mike Travis95a8b6e2010-02-02 14:38:13 -08001094extern void pci_register_set_vga_state(arch_set_vga_state_t func);
1095
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001096#else /* CONFIG_PCI is not enabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097
1098/*
1099 * If the system does not have PCI, clearly these return errors. Define
1100 * these as simple inline functions to avoid hair in drivers.
1101 */
1102
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001103#define _PCI_NOP(o, s, t) \
1104 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1105 int where, t val) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001107
1108#define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1109 _PCI_NOP(o, word, u16 x) \
1110 _PCI_NOP(o, dword, u32 x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111_PCI_NOP_ALL(read, *)
1112_PCI_NOP_ALL(write,)
1113
Andrew Mortond42552c2006-10-21 10:24:12 -07001114static inline struct pci_dev *pci_get_device(unsigned int vendor,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001115 unsigned int device,
1116 struct pci_dev *from)
1117{
1118 return NULL;
1119}
Andrew Mortond42552c2006-10-21 10:24:12 -07001120
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001121static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1122 unsigned int device,
1123 unsigned int ss_vendor,
1124 unsigned int ss_device,
Greg KHb08508c2008-08-26 08:20:34 -07001125 struct pci_dev *from)
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001126{
1127 return NULL;
1128}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001130static inline struct pci_dev *pci_get_class(unsigned int class,
1131 struct pci_dev *from)
1132{
1133 return NULL;
1134}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135
1136#define pci_dev_present(ids) (0)
Zhang, Yanmined4aaad2007-07-15 23:39:39 -07001137#define no_pci_devices() (1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138#define pci_dev_put(dev) do { } while (0)
1139
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001140static inline void pci_set_master(struct pci_dev *dev)
1141{ }
1142
1143static inline int pci_enable_device(struct pci_dev *dev)
1144{
1145 return -EIO;
1146}
1147
1148static inline void pci_disable_device(struct pci_dev *dev)
1149{ }
1150
1151static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1152{
1153 return -EIO;
1154}
1155
Randy Dunlap80be0382008-06-30 11:35:53 -07001156static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1157{
1158 return -EIO;
1159}
1160
FUJITA Tomonori4d57cdf2008-02-04 22:27:55 -08001161static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1162 unsigned int size)
1163{
1164 return -EIO;
1165}
1166
FUJITA Tomonori59fc67d2008-02-04 22:28:14 -08001167static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1168 unsigned long mask)
1169{
1170 return -EIO;
1171}
1172
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001173static inline int pci_assign_resource(struct pci_dev *dev, int i)
1174{
1175 return -EBUSY;
1176}
1177
1178static inline int __pci_register_driver(struct pci_driver *drv,
1179 struct module *owner)
1180{
1181 return 0;
1182}
1183
1184static inline int pci_register_driver(struct pci_driver *drv)
1185{
1186 return 0;
1187}
1188
1189static inline void pci_unregister_driver(struct pci_driver *drv)
1190{ }
1191
1192static inline int pci_find_capability(struct pci_dev *dev, int cap)
1193{
1194 return 0;
1195}
1196
1197static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1198 int cap)
1199{
1200 return 0;
1201}
1202
1203static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1204{
1205 return 0;
1206}
1207
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208/* Power management related routines */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001209static inline int pci_save_state(struct pci_dev *dev)
1210{
1211 return 0;
1212}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
Jon Mason1d3c16a2010-11-30 17:43:26 -06001214static inline void pci_restore_state(struct pci_dev *dev)
1215{ }
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001216
1217static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1218{
1219 return 0;
1220}
1221
Randy Dunlap34492482011-02-14 12:27:50 -08001222static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1223{
1224 return 0;
1225}
1226
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001227static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1228 pm_message_t state)
1229{
1230 return PCI_D0;
1231}
1232
1233static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1234 int enable)
1235{
1236 return 0;
1237}
1238
Jesse Barnesb48d4422010-10-19 13:07:57 -07001239static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type)
1240{
1241}
1242
1243static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type)
1244{
1245}
1246
Jesse Barnes48a92a82011-01-10 12:46:36 -08001247static inline int pci_enable_obff(struct pci_dev *dev, unsigned long type)
1248{
1249 return 0;
1250}
1251
1252static inline void pci_disable_obff(struct pci_dev *dev)
1253{
1254}
1255
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001256static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1257{
1258 return -EIO;
1259}
1260
1261static inline void pci_release_regions(struct pci_dev *dev)
1262{ }
Sergei Shtylyov0da0ead2007-04-01 21:13:58 +04001263
Kumar Galaa46e8122005-07-29 12:16:27 -07001264#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1265
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001266static inline void pci_block_user_cfg_access(struct pci_dev *dev)
1267{ }
1268
1269static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
1270{ }
Brian Kinge04b0ea2005-09-27 01:21:55 -07001271
Randy Dunlapd80d0212007-07-01 12:06:37 -07001272static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1273{ return NULL; }
1274
1275static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1276 unsigned int devfn)
1277{ return NULL; }
1278
1279static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1280 unsigned int devfn)
1281{ return NULL; }
1282
Dave Airlie92298e62010-08-13 10:22:17 +10001283static inline int pci_domain_nr(struct pci_bus *bus)
1284{ return 0; }
1285
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001286#define dev_is_pci(d) (false)
1287#define dev_is_pf(d) (false)
1288#define dev_num_vf(d) (0)
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001289#endif /* CONFIG_PCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290
Greg Kroah-Hartman4352dfd2005-07-28 11:37:33 -07001291/* Include architecture-dependent settings and functions */
1292
1293#include <asm/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
Yinghai Lu1f82de12009-04-23 20:48:32 -07001295#ifndef PCIBIOS_MAX_MEM_32
1296#define PCIBIOS_MAX_MEM_32 (-1)
1297#endif
1298
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299/* these helpers provide future and backwards compatibility
1300 * for accessing popular PCI BAR info */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001301#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1302#define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1303#define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304#define pci_resource_len(dev,bar) \
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001305 ((pci_resource_start((dev), (bar)) == 0 && \
1306 pci_resource_end((dev), (bar)) == \
1307 pci_resource_start((dev), (bar))) ? 0 : \
1308 \
1309 (pci_resource_end((dev), (bar)) - \
1310 pci_resource_start((dev), (bar)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311
1312/* Similar to the helpers above, these manipulate per-pci_dev
1313 * driver-specific data. They are really just a wrapper around
1314 * the generic device structure functions of these calls.
1315 */
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001316static inline void *pci_get_drvdata(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317{
1318 return dev_get_drvdata(&pdev->dev);
1319}
1320
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001321static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322{
1323 dev_set_drvdata(&pdev->dev, data);
1324}
1325
1326/* If you want to know what to call your pci_dev, ask this function.
1327 * Again, it's a wrapper around the generic device.
1328 */
Alexey Zaytsev2fc90f62009-06-24 16:22:30 +04001329static inline const char *pci_name(const struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330{
Greg KHc6c4f072008-07-03 09:49:39 -07001331 return dev_name(&pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332}
1333
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001334
1335/* Some archs don't want to expose struct resource to userland as-is
1336 * in sysfs and /proc
1337 */
1338#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1339static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001340 const struct resource *rsrc, resource_size_t *start,
Greg Kroah-Hartmane31dd6e2006-06-12 17:06:02 -07001341 resource_size_t *end)
Michael Ellerman2311b1f2005-05-13 17:44:10 +10001342{
1343 *start = rsrc->start;
1344 *end = rsrc->end;
1345}
1346#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1347
1348
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349/*
1350 * The world is not perfect and supplies us with broken PCI devices.
1351 * For at least a part of these bugs we need a work-around, so both
1352 * generic (drivers/pci/quirks.c) and per-architecture code can define
1353 * fixup hooks to be called for particular buggy devices.
1354 */
1355
1356struct pci_fixup {
1357 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1358 void (*hook)(struct pci_dev *dev);
1359};
1360
1361enum pci_fixup_pass {
1362 pci_fixup_early, /* Before probing BARs */
1363 pci_fixup_header, /* After reading configuration header */
1364 pci_fixup_final, /* Final phase of device fixups */
1365 pci_fixup_enable, /* pci_enable_device() time */
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001366 pci_fixup_resume, /* pci_device_resume() */
1367 pci_fixup_suspend, /* pci_device_suspend */
1368 pci_fixup_resume_early, /* pci_device_resume_early() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369};
1370
1371/* Anonymous variables would be nice... */
1372#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
Adrian Bunk3ff6eec2008-01-24 22:16:20 +01001373 static const struct pci_fixup __pci_fixup_##name __used \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 __attribute__((__section__(#section))) = { vendor, device, hook };
1375#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1376 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1377 vendor##device##hook, vendor, device, hook)
1378#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1379 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1380 vendor##device##hook, vendor, device, hook)
1381#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1382 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1383 vendor##device##hook, vendor, device, hook)
1384#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1385 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1386 vendor##device##hook, vendor, device, hook)
Alan Cox1597cac2006-12-04 15:14:45 -08001387#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1388 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1389 resume##vendor##device##hook, vendor, device, hook)
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +02001390#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1391 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1392 resume_early##vendor##device##hook, vendor, device, hook)
1393#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1394 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1395 suspend##vendor##device##hook, vendor, device, hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001397#ifdef CONFIG_PCI_QUIRKS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
Rafael J. Wysocki93177a72010-01-02 22:57:24 +01001399#else
1400static inline void pci_fixup_device(enum pci_fixup_pass pass,
1401 struct pci_dev *dev) {}
1402#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001404void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
Al Viro5ea81762007-02-11 15:41:31 +00001405void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
Greg Kroah-Hartman05cca6e2008-01-30 15:21:33 -08001406void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
Al Viro5ea81762007-02-11 15:41:31 +00001407int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
Tejun Heo916fbfb2008-03-12 15:26:34 +09001408int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1409 const char *name);
Tejun Heoec04b072007-03-09 19:45:58 +09001410void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
Al Viro5ea81762007-02-11 15:41:31 +00001411
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412extern int pci_pci_problems;
Alan Cox236561e2006-09-30 23:27:03 -07001413#define PCIPCI_FAIL 1 /* No PCI PCI DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414#define PCIPCI_TRITON 2
1415#define PCIPCI_NATOMA 4
1416#define PCIPCI_VIAETBF 8
1417#define PCIPCI_VSFX 16
Alan Cox236561e2006-09-30 23:27:03 -07001418#define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1419#define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001421extern unsigned long pci_cardbus_io_size;
1422extern unsigned long pci_cardbus_mem_size;
David Howells491424c2009-12-14 14:13:44 +00001423extern u8 __devinitdata pci_dfl_cache_line_size;
Jesse Barnesac1aa472009-10-26 13:20:44 -07001424extern u8 pci_cache_line_size;
Atsushi Nemoto4516a612007-02-05 16:36:06 -08001425
Eric W. Biederman28760482009-09-09 14:09:24 -07001426extern unsigned long pci_hotplug_io_size;
1427extern unsigned long pci_hotplug_mem_size;
1428
Adrian Bunk19792a02008-05-05 21:25:47 +03001429int pcibios_add_platform_entries(struct pci_dev *dev);
1430void pcibios_disable_device(struct pci_dev *dev);
1431int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1432 enum pcie_reset_state state);
Michael Ellerman575e3342007-05-08 12:03:07 +10001433
Robert Hancock7752d5c2008-02-15 01:27:20 -08001434#ifdef CONFIG_PCI_MMCONFIG
Yinghai Lubb63b422008-02-28 23:56:50 -08001435extern void __init pci_mmcfg_early_init(void);
Robert Hancock7752d5c2008-02-15 01:27:20 -08001436extern void __init pci_mmcfg_late_init(void);
1437#else
Yinghai Lubb63b422008-02-28 23:56:50 -08001438static inline void pci_mmcfg_early_init(void) { }
Robert Hancock7752d5c2008-02-15 01:27:20 -08001439static inline void pci_mmcfg_late_init(void) { }
1440#endif
1441
Andrew Patterson0ef5f8f2008-11-10 15:30:50 -07001442int pci_ext_cfg_avail(struct pci_dev *dev);
1443
Andrew Morton1684f5d2008-12-01 14:30:30 -08001444void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
Arjan van de Venaa42d7c2008-09-28 16:36:11 -07001445
Yu Zhaodd7cc442009-03-20 11:25:15 +08001446#ifdef CONFIG_PCI_IOV
1447extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1448extern void pci_disable_sriov(struct pci_dev *dev);
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001449extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001450extern int pci_num_vf(struct pci_dev *dev);
Yu Zhaodd7cc442009-03-20 11:25:15 +08001451#else
1452static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1453{
1454 return -ENODEV;
1455}
1456static inline void pci_disable_sriov(struct pci_dev *dev)
1457{
1458}
Yu Zhao74bb1bc2009-03-20 11:25:16 +08001459static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
1460{
1461 return IRQ_NONE;
1462}
Williams, Mitch Afb8a0d92010-02-10 01:43:04 +00001463static inline int pci_num_vf(struct pci_dev *dev)
1464{
1465 return 0;
1466}
Yu Zhaodd7cc442009-03-20 11:25:15 +08001467#endif
1468
Kenji Kaneshigec825bc92009-06-16 11:01:25 +09001469#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1470extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
1471extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1472#endif
1473
Kenji Kaneshiged7b7e602009-11-11 14:29:54 +09001474/**
1475 * pci_pcie_cap - get the saved PCIe capability offset
1476 * @dev: PCI device
1477 *
1478 * PCIe capability offset is calculated at PCI device initialization
1479 * time and saved in the data structure. This function returns saved
1480 * PCIe capability offset. Using this instead of pci_find_capability()
1481 * reduces unnecessary search in the PCI configuration space. If you
1482 * need to calculate PCIe capability offset from raw device for some
1483 * reasons, please use pci_find_capability() instead.
1484 */
1485static inline int pci_pcie_cap(struct pci_dev *dev)
1486{
1487 return dev->pcie_cap;
1488}
1489
Kenji Kaneshige7eb776c2009-11-11 14:35:22 +09001490/**
1491 * pci_is_pcie - check if the PCI device is PCI Express capable
1492 * @dev: PCI device
1493 *
1494 * Retrun true if the PCI device is PCI Express capable, false otherwise.
1495 */
1496static inline bool pci_is_pcie(struct pci_dev *dev)
1497{
1498 return !!pci_pcie_cap(dev);
1499}
1500
Chris Wright5d990b62009-12-04 12:15:21 -08001501void pci_request_acs(void);
1502
Matt Carlsona2ce7662010-02-26 14:04:39 +00001503
Matt Carlson7ad506f2010-02-26 14:04:40 +00001504#define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1505#define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT)
1506
1507/* Large Resource Data Type Tag Item Names */
1508#define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1509#define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1510#define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1511
1512#define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1513#define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1514#define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1515
1516/* Small Resource Data Type Tag Item Names */
1517#define PCI_VPD_STIN_END 0x78 /* End */
1518
1519#define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1520
1521#define PCI_VPD_SRDT_TIN_MASK 0x78
1522#define PCI_VPD_SRDT_LEN_MASK 0x07
1523
1524#define PCI_VPD_LRDT_TAG_SIZE 3
1525#define PCI_VPD_SRDT_TAG_SIZE 1
Matt Carlsona2ce7662010-02-26 14:04:39 +00001526
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001527#define PCI_VPD_INFO_FLD_HDR_SIZE 3
1528
Matt Carlson4067a852010-02-26 14:04:43 +00001529#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1530#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1531#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
Matt Carlsond4894f32011-03-09 16:58:21 +00001532#define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
Matt Carlson4067a852010-02-26 14:04:43 +00001533
Matt Carlsona2ce7662010-02-26 14:04:39 +00001534/**
1535 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1536 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1537 *
1538 * Returns the extracted Large Resource Data Type length.
1539 */
1540static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1541{
1542 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1543}
1544
Matt Carlson7ad506f2010-02-26 14:04:40 +00001545/**
1546 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1547 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1548 *
1549 * Returns the extracted Small Resource Data Type length.
1550 */
1551static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1552{
1553 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1554}
1555
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001556/**
Matt Carlsone1d5bda2010-02-26 14:04:42 +00001557 * pci_vpd_info_field_size - Extracts the information field length
1558 * @lrdt: Pointer to the beginning of an information field header
1559 *
1560 * Returns the extracted information field length.
1561 */
1562static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1563{
1564 return info_field[2];
1565}
1566
1567/**
Matt Carlsonb55ac1b2010-02-26 14:04:41 +00001568 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1569 * @buf: Pointer to buffered vpd data
1570 * @off: The offset into the buffer at which to begin the search
1571 * @len: The length of the vpd buffer
1572 * @rdt: The Resource Data Type to search for
1573 *
1574 * Returns the index where the Resource Data Type was found or
1575 * -ENOENT otherwise.
1576 */
1577int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1578
Matt Carlson4067a852010-02-26 14:04:43 +00001579/**
1580 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1581 * @buf: Pointer to buffered vpd data
1582 * @off: The offset into the buffer at which to begin the search
1583 * @len: The length of the buffer area, relative to off, in which to search
1584 * @kw: The keyword to search for
1585 *
1586 * Returns the index where the information field keyword was found or
1587 * -ENOENT otherwise.
1588 */
1589int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1590 unsigned int len, const char *kw);
1591
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592#endif /* __KERNEL__ */
1593#endif /* LINUX_PCI_H */