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1 | /* | |
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 | #ifndef LINUX_PCI_H | |
17 | #define LINUX_PCI_H | |
18 | ||
19 | ||
20 | #include <linux/mod_devicetable.h> | |
21 | ||
22 | #include <linux/types.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/ioport.h> | |
25 | #include <linux/list.h> | |
26 | #include <linux/compiler.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/kobject.h> | |
29 | #include <linux/atomic.h> | |
30 | #include <linux/device.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/io.h> | |
33 | #include <linux/resource_ext.h> | |
34 | #include <uapi/linux/pci.h> | |
35 | ||
36 | #include <linux/pci_ids.h> | |
37 | ||
38 | /* | |
39 | * The PCI interface treats multi-function devices as independent | |
40 | * devices. The slot/function address of each device is encoded | |
41 | * in a single byte as follows: | |
42 | * | |
43 | * 7:3 = slot | |
44 | * 2:0 = function | |
45 | * | |
46 | * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h. | |
47 | * In the interest of not exposing interfaces to user-space unnecessarily, | |
48 | * the following kernel-only defines are being added here. | |
49 | */ | |
50 | #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn)) | |
51 | /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */ | |
52 | #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff) | |
53 | ||
54 | /* pci_slot represents a physical slot */ | |
55 | struct pci_slot { | |
56 | struct pci_bus *bus; /* The bus this slot is on */ | |
57 | struct list_head list; /* node in list of slots on this bus */ | |
58 | struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */ | |
59 | unsigned char number; /* PCI_SLOT(pci_dev->devfn) */ | |
60 | struct kobject kobj; | |
61 | }; | |
62 | ||
63 | static inline const char *pci_slot_name(const struct pci_slot *slot) | |
64 | { | |
65 | return kobject_name(&slot->kobj); | |
66 | } | |
67 | ||
68 | /* File state for mmap()s on /proc/bus/pci/X/Y */ | |
69 | enum pci_mmap_state { | |
70 | pci_mmap_io, | |
71 | pci_mmap_mem | |
72 | }; | |
73 | ||
74 | /* | |
75 | * For PCI devices, the region numbers are assigned this way: | |
76 | */ | |
77 | enum { | |
78 | /* #0-5: standard PCI resources */ | |
79 | PCI_STD_RESOURCES, | |
80 | PCI_STD_RESOURCE_END = 5, | |
81 | ||
82 | /* #6: expansion ROM resource */ | |
83 | PCI_ROM_RESOURCE, | |
84 | ||
85 | /* device specific resources */ | |
86 | #ifdef CONFIG_PCI_IOV | |
87 | PCI_IOV_RESOURCES, | |
88 | PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1, | |
89 | #endif | |
90 | ||
91 | /* resources assigned to buses behind the bridge */ | |
92 | #define PCI_BRIDGE_RESOURCE_NUM 4 | |
93 | ||
94 | PCI_BRIDGE_RESOURCES, | |
95 | PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES + | |
96 | PCI_BRIDGE_RESOURCE_NUM - 1, | |
97 | ||
98 | /* total resources associated with a PCI device */ | |
99 | PCI_NUM_RESOURCES, | |
100 | ||
101 | /* preserve this for compatibility */ | |
102 | DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES, | |
103 | }; | |
104 | ||
105 | /* | |
106 | * pci_power_t values must match the bits in the Capabilities PME_Support | |
107 | * and Control/Status PowerState fields in the Power Management capability. | |
108 | */ | |
109 | typedef int __bitwise pci_power_t; | |
110 | ||
111 | #define PCI_D0 ((pci_power_t __force) 0) | |
112 | #define PCI_D1 ((pci_power_t __force) 1) | |
113 | #define PCI_D2 ((pci_power_t __force) 2) | |
114 | #define PCI_D3hot ((pci_power_t __force) 3) | |
115 | #define PCI_D3cold ((pci_power_t __force) 4) | |
116 | #define PCI_UNKNOWN ((pci_power_t __force) 5) | |
117 | #define PCI_POWER_ERROR ((pci_power_t __force) -1) | |
118 | ||
119 | /* Remember to update this when the list above changes! */ | |
120 | extern const char *pci_power_names[]; | |
121 | ||
122 | static inline const char *pci_power_name(pci_power_t state) | |
123 | { | |
124 | return pci_power_names[1 + (__force int) state]; | |
125 | } | |
126 | ||
127 | #define PCI_PM_D2_DELAY 200 | |
128 | #define PCI_PM_D3_WAIT 10 | |
129 | #define PCI_PM_D3COLD_WAIT 100 | |
130 | #define PCI_PM_BUS_WAIT 50 | |
131 | ||
132 | /** The pci_channel state describes connectivity between the CPU and | |
133 | * the pci device. If some PCI bus between here and the pci device | |
134 | * has crashed or locked up, this info is reflected here. | |
135 | */ | |
136 | typedef unsigned int __bitwise pci_channel_state_t; | |
137 | ||
138 | enum pci_channel_state { | |
139 | /* I/O channel is in normal state */ | |
140 | pci_channel_io_normal = (__force pci_channel_state_t) 1, | |
141 | ||
142 | /* I/O to channel is blocked */ | |
143 | pci_channel_io_frozen = (__force pci_channel_state_t) 2, | |
144 | ||
145 | /* PCI card is dead */ | |
146 | pci_channel_io_perm_failure = (__force pci_channel_state_t) 3, | |
147 | }; | |
148 | ||
149 | typedef unsigned int __bitwise pcie_reset_state_t; | |
150 | ||
151 | enum pcie_reset_state { | |
152 | /* Reset is NOT asserted (Use to deassert reset) */ | |
153 | pcie_deassert_reset = (__force pcie_reset_state_t) 1, | |
154 | ||
155 | /* Use #PERST to reset PCIe device */ | |
156 | pcie_warm_reset = (__force pcie_reset_state_t) 2, | |
157 | ||
158 | /* Use PCIe Hot Reset to reset device */ | |
159 | pcie_hot_reset = (__force pcie_reset_state_t) 3 | |
160 | }; | |
161 | ||
162 | typedef unsigned short __bitwise pci_dev_flags_t; | |
163 | enum pci_dev_flags { | |
164 | /* INTX_DISABLE in PCI_COMMAND register disables MSI | |
165 | * generation too. | |
166 | */ | |
167 | PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0), | |
168 | /* Device configuration is irrevocably lost if disabled into D3 */ | |
169 | PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1), | |
170 | /* Provide indication device is assigned by a Virtual Machine Manager */ | |
171 | PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2), | |
172 | /* Flag for quirk use to store if quirk-specific ACS is enabled */ | |
173 | PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3), | |
174 | /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */ | |
175 | PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5), | |
176 | /* Do not use bus resets for device */ | |
177 | PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6), | |
178 | /* Do not use PM reset even if device advertises NoSoftRst- */ | |
179 | PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7), | |
180 | /* Get VPD from function 0 VPD */ | |
181 | PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8), | |
182 | /* a non-root bridge where translation occurs, stop alias search here */ | |
183 | PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9), | |
184 | /* Do not use FLR even if device advertises PCI_AF_CAP */ | |
185 | PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10), | |
186 | }; | |
187 | ||
188 | enum pci_irq_reroute_variant { | |
189 | INTEL_IRQ_REROUTE_VARIANT = 1, | |
190 | MAX_IRQ_REROUTE_VARIANTS = 3 | |
191 | }; | |
192 | ||
193 | typedef unsigned short __bitwise pci_bus_flags_t; | |
194 | enum pci_bus_flags { | |
195 | PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1, | |
196 | PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2, | |
197 | PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4, | |
198 | }; | |
199 | ||
200 | /* These values come from the PCI Express Spec */ | |
201 | enum pcie_link_width { | |
202 | PCIE_LNK_WIDTH_RESRV = 0x00, | |
203 | PCIE_LNK_X1 = 0x01, | |
204 | PCIE_LNK_X2 = 0x02, | |
205 | PCIE_LNK_X4 = 0x04, | |
206 | PCIE_LNK_X8 = 0x08, | |
207 | PCIE_LNK_X12 = 0x0C, | |
208 | PCIE_LNK_X16 = 0x10, | |
209 | PCIE_LNK_X32 = 0x20, | |
210 | PCIE_LNK_WIDTH_UNKNOWN = 0xFF, | |
211 | }; | |
212 | ||
213 | /* Based on the PCI Hotplug Spec, but some values are made up by us */ | |
214 | enum pci_bus_speed { | |
215 | PCI_SPEED_33MHz = 0x00, | |
216 | PCI_SPEED_66MHz = 0x01, | |
217 | PCI_SPEED_66MHz_PCIX = 0x02, | |
218 | PCI_SPEED_100MHz_PCIX = 0x03, | |
219 | PCI_SPEED_133MHz_PCIX = 0x04, | |
220 | PCI_SPEED_66MHz_PCIX_ECC = 0x05, | |
221 | PCI_SPEED_100MHz_PCIX_ECC = 0x06, | |
222 | PCI_SPEED_133MHz_PCIX_ECC = 0x07, | |
223 | PCI_SPEED_66MHz_PCIX_266 = 0x09, | |
224 | PCI_SPEED_100MHz_PCIX_266 = 0x0a, | |
225 | PCI_SPEED_133MHz_PCIX_266 = 0x0b, | |
226 | AGP_UNKNOWN = 0x0c, | |
227 | AGP_1X = 0x0d, | |
228 | AGP_2X = 0x0e, | |
229 | AGP_4X = 0x0f, | |
230 | AGP_8X = 0x10, | |
231 | PCI_SPEED_66MHz_PCIX_533 = 0x11, | |
232 | PCI_SPEED_100MHz_PCIX_533 = 0x12, | |
233 | PCI_SPEED_133MHz_PCIX_533 = 0x13, | |
234 | PCIE_SPEED_2_5GT = 0x14, | |
235 | PCIE_SPEED_5_0GT = 0x15, | |
236 | PCIE_SPEED_8_0GT = 0x16, | |
237 | PCI_SPEED_UNKNOWN = 0xff, | |
238 | }; | |
239 | ||
240 | struct pci_cap_saved_data { | |
241 | u16 cap_nr; | |
242 | bool cap_extended; | |
243 | unsigned int size; | |
244 | u32 data[0]; | |
245 | }; | |
246 | ||
247 | struct pci_cap_saved_state { | |
248 | struct hlist_node next; | |
249 | struct pci_cap_saved_data cap; | |
250 | }; | |
251 | ||
252 | struct irq_affinity; | |
253 | struct pcie_link_state; | |
254 | struct pci_vpd; | |
255 | struct pci_sriov; | |
256 | struct pci_ats; | |
257 | ||
258 | /* | |
259 | * The pci_dev structure is used to describe PCI devices. | |
260 | */ | |
261 | struct pci_dev { | |
262 | struct list_head bus_list; /* node in per-bus list */ | |
263 | struct pci_bus *bus; /* bus this device is on */ | |
264 | struct pci_bus *subordinate; /* bus this device bridges to */ | |
265 | ||
266 | void *sysdata; /* hook for sys-specific extension */ | |
267 | struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */ | |
268 | struct pci_slot *slot; /* Physical slot this device is in */ | |
269 | ||
270 | unsigned int devfn; /* encoded device & function index */ | |
271 | unsigned short vendor; | |
272 | unsigned short device; | |
273 | unsigned short subsystem_vendor; | |
274 | unsigned short subsystem_device; | |
275 | unsigned int class; /* 3 bytes: (base,sub,prog-if) */ | |
276 | u8 revision; /* PCI revision, low byte of class word */ | |
277 | u8 hdr_type; /* PCI header type (`multi' flag masked out) */ | |
278 | #ifdef CONFIG_PCIEAER | |
279 | u16 aer_cap; /* AER capability offset */ | |
280 | #endif | |
281 | u8 pcie_cap; /* PCIe capability offset */ | |
282 | u8 msi_cap; /* MSI capability offset */ | |
283 | u8 msix_cap; /* MSI-X capability offset */ | |
284 | u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */ | |
285 | u8 rom_base_reg; /* which config register controls the ROM */ | |
286 | u8 pin; /* which interrupt pin this device uses */ | |
287 | u16 pcie_flags_reg; /* cached PCIe Capabilities Register */ | |
288 | unsigned long *dma_alias_mask;/* mask of enabled devfn aliases */ | |
289 | ||
290 | struct pci_driver *driver; /* which driver has allocated this device */ | |
291 | u64 dma_mask; /* Mask of the bits of bus address this | |
292 | device implements. Normally this is | |
293 | 0xffffffff. You only need to change | |
294 | this if your device has broken DMA | |
295 | or supports 64-bit transfers. */ | |
296 | ||
297 | struct device_dma_parameters dma_parms; | |
298 | ||
299 | pci_power_t current_state; /* Current operating state. In ACPI-speak, | |
300 | this is D0-D3, D0 being fully functional, | |
301 | and D3 being off. */ | |
302 | u8 pm_cap; /* PM capability offset */ | |
303 | unsigned int pme_support:5; /* Bitmask of states from which PME# | |
304 | can be generated */ | |
305 | unsigned int pme_interrupt:1; | |
306 | unsigned int pme_poll:1; /* Poll device's PME status bit */ | |
307 | unsigned int d1_support:1; /* Low power state D1 is supported */ | |
308 | unsigned int d2_support:1; /* Low power state D2 is supported */ | |
309 | unsigned int no_d1d2:1; /* D1 and D2 are forbidden */ | |
310 | unsigned int no_d3cold:1; /* D3cold is forbidden */ | |
311 | unsigned int bridge_d3:1; /* Allow D3 for bridge */ | |
312 | unsigned int d3cold_allowed:1; /* D3cold is allowed by user */ | |
313 | unsigned int mmio_always_on:1; /* disallow turning off io/mem | |
314 | decoding during bar sizing */ | |
315 | unsigned int wakeup_prepared:1; | |
316 | unsigned int runtime_d3cold:1; /* whether go through runtime | |
317 | D3cold, not set for devices | |
318 | powered on/off by the | |
319 | corresponding bridge */ | |
320 | unsigned int ignore_hotplug:1; /* Ignore hotplug events */ | |
321 | unsigned int hotplug_user_indicators:1; /* SlotCtl indicators | |
322 | controlled exclusively by | |
323 | user sysfs */ | |
324 | unsigned int d3_delay; /* D3->D0 transition time in ms */ | |
325 | unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */ | |
326 | ||
327 | #ifdef CONFIG_PCIEASPM | |
328 | struct pcie_link_state *link_state; /* ASPM link state */ | |
329 | #endif | |
330 | ||
331 | pci_channel_state_t error_state; /* current connectivity state */ | |
332 | struct device dev; /* Generic device interface */ | |
333 | ||
334 | int cfg_size; /* Size of configuration space */ | |
335 | ||
336 | /* | |
337 | * Instead of touching interrupt line and base address registers | |
338 | * directly, use the values stored here. They might be different! | |
339 | */ | |
340 | unsigned int irq; | |
341 | struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */ | |
342 | ||
343 | bool match_driver; /* Skip attaching driver */ | |
344 | /* These fields are used by common fixups */ | |
345 | unsigned int transparent:1; /* Subtractive decode PCI bridge */ | |
346 | unsigned int multifunction:1;/* Part of multi-function device */ | |
347 | /* keep track of device state */ | |
348 | unsigned int is_added:1; | |
349 | unsigned int is_busmaster:1; /* device is busmaster */ | |
350 | unsigned int no_msi:1; /* device may not use msi */ | |
351 | unsigned int no_64bit_msi:1; /* device may only use 32-bit MSIs */ | |
352 | unsigned int block_cfg_access:1; /* config space access is blocked */ | |
353 | unsigned int broken_parity_status:1; /* Device generates false positive parity */ | |
354 | unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */ | |
355 | unsigned int msi_enabled:1; | |
356 | unsigned int msix_enabled:1; | |
357 | unsigned int ari_enabled:1; /* ARI forwarding */ | |
358 | unsigned int ats_enabled:1; /* Address Translation Service */ | |
359 | unsigned int is_managed:1; | |
360 | unsigned int needs_freset:1; /* Dev requires fundamental reset */ | |
361 | unsigned int state_saved:1; | |
362 | unsigned int is_physfn:1; | |
363 | unsigned int is_virtfn:1; | |
364 | unsigned int reset_fn:1; | |
365 | unsigned int is_hotplug_bridge:1; | |
366 | unsigned int is_thunderbolt:1; /* Thunderbolt controller */ | |
367 | unsigned int __aer_firmware_first_valid:1; | |
368 | unsigned int __aer_firmware_first:1; | |
369 | unsigned int broken_intx_masking:1; | |
370 | unsigned int io_window_1k:1; /* Intel P2P bridge 1K I/O windows */ | |
371 | unsigned int irq_managed:1; | |
372 | unsigned int has_secondary_link:1; | |
373 | unsigned int non_compliant_bars:1; /* broken BARs; ignore them */ | |
374 | pci_dev_flags_t dev_flags; | |
375 | atomic_t enable_cnt; /* pci_enable_device has been called */ | |
376 | ||
377 | u32 saved_config_space[16]; /* config space saved at suspend time */ | |
378 | struct hlist_head saved_cap_space; | |
379 | struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */ | |
380 | int rom_attr_enabled; /* has display of the rom attribute been enabled? */ | |
381 | struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */ | |
382 | struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */ | |
383 | ||
384 | #ifdef CONFIG_PCIE_PTM | |
385 | unsigned int ptm_root:1; | |
386 | unsigned int ptm_enabled:1; | |
387 | u8 ptm_granularity; | |
388 | #endif | |
389 | #ifdef CONFIG_PCI_MSI | |
390 | const struct attribute_group **msi_irq_groups; | |
391 | #endif | |
392 | struct pci_vpd *vpd; | |
393 | #ifdef CONFIG_PCI_ATS | |
394 | union { | |
395 | struct pci_sriov *sriov; /* SR-IOV capability related */ | |
396 | struct pci_dev *physfn; /* the PF this VF is associated with */ | |
397 | }; | |
398 | u16 ats_cap; /* ATS Capability offset */ | |
399 | u8 ats_stu; /* ATS Smallest Translation Unit */ | |
400 | atomic_t ats_ref_cnt; /* number of VFs with ATS enabled */ | |
401 | #endif | |
402 | phys_addr_t rom; /* Physical address of ROM if it's not from the BAR */ | |
403 | size_t romlen; /* Length of ROM if it's not from the BAR */ | |
404 | char *driver_override; /* Driver name to force a match */ | |
405 | ||
406 | unsigned long priv_flags; /* Private flags for the pci driver */ | |
407 | }; | |
408 | ||
409 | static inline struct pci_dev *pci_physfn(struct pci_dev *dev) | |
410 | { | |
411 | #ifdef CONFIG_PCI_IOV | |
412 | if (dev->is_virtfn) | |
413 | dev = dev->physfn; | |
414 | #endif | |
415 | return dev; | |
416 | } | |
417 | ||
418 | struct pci_dev *pci_alloc_dev(struct pci_bus *bus); | |
419 | ||
420 | #define to_pci_dev(n) container_of(n, struct pci_dev, dev) | |
421 | #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL) | |
422 | ||
423 | static inline int pci_channel_offline(struct pci_dev *pdev) | |
424 | { | |
425 | return (pdev->error_state != pci_channel_io_normal); | |
426 | } | |
427 | ||
428 | struct pci_host_bridge { | |
429 | struct device dev; | |
430 | struct pci_bus *bus; /* root bus */ | |
431 | struct pci_ops *ops; | |
432 | void *sysdata; | |
433 | int busnr; | |
434 | struct list_head windows; /* resource_entry */ | |
435 | void (*release_fn)(struct pci_host_bridge *); | |
436 | void *release_data; | |
437 | struct msi_controller *msi; | |
438 | unsigned int ignore_reset_delay:1; /* for entire hierarchy */ | |
439 | /* Resource alignment requirements */ | |
440 | resource_size_t (*align_resource)(struct pci_dev *dev, | |
441 | const struct resource *res, | |
442 | resource_size_t start, | |
443 | resource_size_t size, | |
444 | resource_size_t align); | |
445 | unsigned long private[0] ____cacheline_aligned; | |
446 | }; | |
447 | ||
448 | #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev) | |
449 | ||
450 | static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge) | |
451 | { | |
452 | return (void *)bridge->private; | |
453 | } | |
454 | ||
455 | static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv) | |
456 | { | |
457 | return container_of(priv, struct pci_host_bridge, private); | |
458 | } | |
459 | ||
460 | struct pci_host_bridge *pci_alloc_host_bridge(size_t priv); | |
461 | int pci_register_host_bridge(struct pci_host_bridge *bridge); | |
462 | struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus); | |
463 | ||
464 | void pci_set_host_bridge_release(struct pci_host_bridge *bridge, | |
465 | void (*release_fn)(struct pci_host_bridge *), | |
466 | void *release_data); | |
467 | ||
468 | int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge); | |
469 | ||
470 | /* | |
471 | * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond | |
472 | * to P2P or CardBus bridge windows) go in a table. Additional ones (for | |
473 | * buses below host bridges or subtractive decode bridges) go in the list. | |
474 | * Use pci_bus_for_each_resource() to iterate through all the resources. | |
475 | */ | |
476 | ||
477 | /* | |
478 | * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly | |
479 | * and there's no way to program the bridge with the details of the window. | |
480 | * This does not apply to ACPI _CRS windows, even with the _DEC subtractive- | |
481 | * decode bit set, because they are explicit and can be programmed with _SRS. | |
482 | */ | |
483 | #define PCI_SUBTRACTIVE_DECODE 0x1 | |
484 | ||
485 | struct pci_bus_resource { | |
486 | struct list_head list; | |
487 | struct resource *res; | |
488 | unsigned int flags; | |
489 | }; | |
490 | ||
491 | #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */ | |
492 | ||
493 | struct pci_bus { | |
494 | struct list_head node; /* node in list of buses */ | |
495 | struct pci_bus *parent; /* parent bus this bridge is on */ | |
496 | struct list_head children; /* list of child buses */ | |
497 | struct list_head devices; /* list of devices on this bus */ | |
498 | struct pci_dev *self; /* bridge device as seen by parent */ | |
499 | struct list_head slots; /* list of slots on this bus; | |
500 | protected by pci_slot_mutex */ | |
501 | struct resource *resource[PCI_BRIDGE_RESOURCE_NUM]; | |
502 | struct list_head resources; /* address space routed to this bus */ | |
503 | struct resource busn_res; /* bus numbers routed to this bus */ | |
504 | ||
505 | struct pci_ops *ops; /* configuration access functions */ | |
506 | struct msi_controller *msi; /* MSI controller */ | |
507 | void *sysdata; /* hook for sys-specific extension */ | |
508 | struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */ | |
509 | ||
510 | unsigned char number; /* bus number */ | |
511 | unsigned char primary; /* number of primary bridge */ | |
512 | unsigned char max_bus_speed; /* enum pci_bus_speed */ | |
513 | unsigned char cur_bus_speed; /* enum pci_bus_speed */ | |
514 | #ifdef CONFIG_PCI_DOMAINS_GENERIC | |
515 | int domain_nr; | |
516 | #endif | |
517 | ||
518 | char name[48]; | |
519 | ||
520 | unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */ | |
521 | pci_bus_flags_t bus_flags; /* inherited by child buses */ | |
522 | struct device *bridge; | |
523 | struct device dev; | |
524 | struct bin_attribute *legacy_io; /* legacy I/O for this bus */ | |
525 | struct bin_attribute *legacy_mem; /* legacy mem */ | |
526 | unsigned int is_added:1; | |
527 | }; | |
528 | ||
529 | #define to_pci_bus(n) container_of(n, struct pci_bus, dev) | |
530 | ||
531 | /* | |
532 | * Returns true if the PCI bus is root (behind host-PCI bridge), | |
533 | * false otherwise | |
534 | * | |
535 | * Some code assumes that "bus->self == NULL" means that bus is a root bus. | |
536 | * This is incorrect because "virtual" buses added for SR-IOV (via | |
537 | * virtfn_add_bus()) have "bus->self == NULL" but are not root buses. | |
538 | */ | |
539 | static inline bool pci_is_root_bus(struct pci_bus *pbus) | |
540 | { | |
541 | return !(pbus->parent); | |
542 | } | |
543 | ||
544 | /** | |
545 | * pci_is_bridge - check if the PCI device is a bridge | |
546 | * @dev: PCI device | |
547 | * | |
548 | * Return true if the PCI device is bridge whether it has subordinate | |
549 | * or not. | |
550 | */ | |
551 | static inline bool pci_is_bridge(struct pci_dev *dev) | |
552 | { | |
553 | return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
554 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS; | |
555 | } | |
556 | ||
557 | static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev) | |
558 | { | |
559 | dev = pci_physfn(dev); | |
560 | if (pci_is_root_bus(dev->bus)) | |
561 | return NULL; | |
562 | ||
563 | return dev->bus->self; | |
564 | } | |
565 | ||
566 | struct device *pci_get_host_bridge_device(struct pci_dev *dev); | |
567 | void pci_put_host_bridge_device(struct device *dev); | |
568 | ||
569 | #ifdef CONFIG_PCI_MSI | |
570 | static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) | |
571 | { | |
572 | return pci_dev->msi_enabled || pci_dev->msix_enabled; | |
573 | } | |
574 | #else | |
575 | static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; } | |
576 | #endif | |
577 | ||
578 | /* | |
579 | * Error values that may be returned by PCI functions. | |
580 | */ | |
581 | #define PCIBIOS_SUCCESSFUL 0x00 | |
582 | #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81 | |
583 | #define PCIBIOS_BAD_VENDOR_ID 0x83 | |
584 | #define PCIBIOS_DEVICE_NOT_FOUND 0x86 | |
585 | #define PCIBIOS_BAD_REGISTER_NUMBER 0x87 | |
586 | #define PCIBIOS_SET_FAILED 0x88 | |
587 | #define PCIBIOS_BUFFER_TOO_SMALL 0x89 | |
588 | ||
589 | /* | |
590 | * Translate above to generic errno for passing back through non-PCI code. | |
591 | */ | |
592 | static inline int pcibios_err_to_errno(int err) | |
593 | { | |
594 | if (err <= PCIBIOS_SUCCESSFUL) | |
595 | return err; /* Assume already errno */ | |
596 | ||
597 | switch (err) { | |
598 | case PCIBIOS_FUNC_NOT_SUPPORTED: | |
599 | return -ENOENT; | |
600 | case PCIBIOS_BAD_VENDOR_ID: | |
601 | return -ENOTTY; | |
602 | case PCIBIOS_DEVICE_NOT_FOUND: | |
603 | return -ENODEV; | |
604 | case PCIBIOS_BAD_REGISTER_NUMBER: | |
605 | return -EFAULT; | |
606 | case PCIBIOS_SET_FAILED: | |
607 | return -EIO; | |
608 | case PCIBIOS_BUFFER_TOO_SMALL: | |
609 | return -ENOSPC; | |
610 | } | |
611 | ||
612 | return -ERANGE; | |
613 | } | |
614 | ||
615 | /* Low-level architecture-dependent routines */ | |
616 | ||
617 | struct pci_ops { | |
618 | int (*add_bus)(struct pci_bus *bus); | |
619 | void (*remove_bus)(struct pci_bus *bus); | |
620 | void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where); | |
621 | int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val); | |
622 | int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val); | |
623 | }; | |
624 | ||
625 | /* | |
626 | * ACPI needs to be able to access PCI config space before we've done a | |
627 | * PCI bus scan and created pci_bus structures. | |
628 | */ | |
629 | int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn, | |
630 | int reg, int len, u32 *val); | |
631 | int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn, | |
632 | int reg, int len, u32 val); | |
633 | ||
634 | #ifdef CONFIG_PCI_BUS_ADDR_T_64BIT | |
635 | typedef u64 pci_bus_addr_t; | |
636 | #else | |
637 | typedef u32 pci_bus_addr_t; | |
638 | #endif | |
639 | ||
640 | struct pci_bus_region { | |
641 | pci_bus_addr_t start; | |
642 | pci_bus_addr_t end; | |
643 | }; | |
644 | ||
645 | struct pci_dynids { | |
646 | spinlock_t lock; /* protects list, index */ | |
647 | struct list_head list; /* for IDs added at runtime */ | |
648 | }; | |
649 | ||
650 | ||
651 | /* | |
652 | * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides | |
653 | * a set of callbacks in struct pci_error_handlers, that device driver | |
654 | * will be notified of PCI bus errors, and will be driven to recovery | |
655 | * when an error occurs. | |
656 | */ | |
657 | ||
658 | typedef unsigned int __bitwise pci_ers_result_t; | |
659 | ||
660 | enum pci_ers_result { | |
661 | /* no result/none/not supported in device driver */ | |
662 | PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1, | |
663 | ||
664 | /* Device driver can recover without slot reset */ | |
665 | PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2, | |
666 | ||
667 | /* Device driver wants slot to be reset. */ | |
668 | PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3, | |
669 | ||
670 | /* Device has completely failed, is unrecoverable */ | |
671 | PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4, | |
672 | ||
673 | /* Device driver is fully recovered and operational */ | |
674 | PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5, | |
675 | ||
676 | /* No AER capabilities registered for the driver */ | |
677 | PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6, | |
678 | }; | |
679 | ||
680 | /* PCI bus error event callbacks */ | |
681 | struct pci_error_handlers { | |
682 | /* PCI bus error detected on this device */ | |
683 | pci_ers_result_t (*error_detected)(struct pci_dev *dev, | |
684 | enum pci_channel_state error); | |
685 | ||
686 | /* MMIO has been re-enabled, but not DMA */ | |
687 | pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev); | |
688 | ||
689 | /* PCI slot has been reset */ | |
690 | pci_ers_result_t (*slot_reset)(struct pci_dev *dev); | |
691 | ||
692 | /* PCI function reset prepare or completed */ | |
693 | void (*reset_notify)(struct pci_dev *dev, bool prepare); | |
694 | ||
695 | /* Device driver may resume normal operations */ | |
696 | void (*resume)(struct pci_dev *dev); | |
697 | }; | |
698 | ||
699 | ||
700 | struct module; | |
701 | struct pci_driver { | |
702 | struct list_head node; | |
703 | const char *name; | |
704 | const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */ | |
705 | int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */ | |
706 | void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */ | |
707 | int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */ | |
708 | int (*suspend_late) (struct pci_dev *dev, pm_message_t state); | |
709 | int (*resume_early) (struct pci_dev *dev); | |
710 | int (*resume) (struct pci_dev *dev); /* Device woken up */ | |
711 | void (*shutdown) (struct pci_dev *dev); | |
712 | int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* PF pdev */ | |
713 | const struct pci_error_handlers *err_handler; | |
714 | struct device_driver driver; | |
715 | struct pci_dynids dynids; | |
716 | }; | |
717 | ||
718 | #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver) | |
719 | ||
720 | /** | |
721 | * PCI_DEVICE - macro used to describe a specific pci device | |
722 | * @vend: the 16 bit PCI Vendor ID | |
723 | * @dev: the 16 bit PCI Device ID | |
724 | * | |
725 | * This macro is used to create a struct pci_device_id that matches a | |
726 | * specific device. The subvendor and subdevice fields will be set to | |
727 | * PCI_ANY_ID. | |
728 | */ | |
729 | #define PCI_DEVICE(vend,dev) \ | |
730 | .vendor = (vend), .device = (dev), \ | |
731 | .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID | |
732 | ||
733 | /** | |
734 | * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem | |
735 | * @vend: the 16 bit PCI Vendor ID | |
736 | * @dev: the 16 bit PCI Device ID | |
737 | * @subvend: the 16 bit PCI Subvendor ID | |
738 | * @subdev: the 16 bit PCI Subdevice ID | |
739 | * | |
740 | * This macro is used to create a struct pci_device_id that matches a | |
741 | * specific device with subsystem information. | |
742 | */ | |
743 | #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \ | |
744 | .vendor = (vend), .device = (dev), \ | |
745 | .subvendor = (subvend), .subdevice = (subdev) | |
746 | ||
747 | /** | |
748 | * PCI_DEVICE_CLASS - macro used to describe a specific pci device class | |
749 | * @dev_class: the class, subclass, prog-if triple for this device | |
750 | * @dev_class_mask: the class mask for this device | |
751 | * | |
752 | * This macro is used to create a struct pci_device_id that matches a | |
753 | * specific PCI class. The vendor, device, subvendor, and subdevice | |
754 | * fields will be set to PCI_ANY_ID. | |
755 | */ | |
756 | #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \ | |
757 | .class = (dev_class), .class_mask = (dev_class_mask), \ | |
758 | .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \ | |
759 | .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID | |
760 | ||
761 | /** | |
762 | * PCI_VDEVICE - macro used to describe a specific pci device in short form | |
763 | * @vend: the vendor name | |
764 | * @dev: the 16 bit PCI Device ID | |
765 | * | |
766 | * This macro is used to create a struct pci_device_id that matches a | |
767 | * specific PCI device. The subvendor, and subdevice fields will be set | |
768 | * to PCI_ANY_ID. The macro allows the next field to follow as the device | |
769 | * private data. | |
770 | */ | |
771 | ||
772 | #define PCI_VDEVICE(vend, dev) \ | |
773 | .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \ | |
774 | .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0 | |
775 | ||
776 | enum { | |
777 | PCI_REASSIGN_ALL_RSRC = 0x00000001, /* ignore firmware setup */ | |
778 | PCI_REASSIGN_ALL_BUS = 0x00000002, /* reassign all bus numbers */ | |
779 | PCI_PROBE_ONLY = 0x00000004, /* use existing setup */ | |
780 | PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* don't do ISA alignment */ | |
781 | PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* enable domains in /proc */ | |
782 | PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */ | |
783 | PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* scan all, not just dev 0 */ | |
784 | }; | |
785 | ||
786 | /* these external functions are only available when PCI support is enabled */ | |
787 | #ifdef CONFIG_PCI | |
788 | ||
789 | extern unsigned int pci_flags; | |
790 | ||
791 | static inline void pci_set_flags(int flags) { pci_flags = flags; } | |
792 | static inline void pci_add_flags(int flags) { pci_flags |= flags; } | |
793 | static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; } | |
794 | static inline int pci_has_flag(int flag) { return pci_flags & flag; } | |
795 | ||
796 | void pcie_bus_configure_settings(struct pci_bus *bus); | |
797 | ||
798 | enum pcie_bus_config_types { | |
799 | PCIE_BUS_TUNE_OFF, /* don't touch MPS at all */ | |
800 | PCIE_BUS_DEFAULT, /* ensure MPS matches upstream bridge */ | |
801 | PCIE_BUS_SAFE, /* use largest MPS boot-time devices support */ | |
802 | PCIE_BUS_PERFORMANCE, /* use MPS and MRRS for best performance */ | |
803 | PCIE_BUS_PEER2PEER, /* set MPS = 128 for all devices */ | |
804 | }; | |
805 | ||
806 | extern enum pcie_bus_config_types pcie_bus_config; | |
807 | ||
808 | extern struct bus_type pci_bus_type; | |
809 | ||
810 | /* Do NOT directly access these two variables, unless you are arch-specific PCI | |
811 | * code, or PCI core code. */ | |
812 | extern struct list_head pci_root_buses; /* list of all known PCI buses */ | |
813 | /* Some device drivers need know if PCI is initiated */ | |
814 | int no_pci_devices(void); | |
815 | ||
816 | void pcibios_resource_survey_bus(struct pci_bus *bus); | |
817 | void pcibios_bus_add_device(struct pci_dev *pdev); | |
818 | void pcibios_add_bus(struct pci_bus *bus); | |
819 | void pcibios_remove_bus(struct pci_bus *bus); | |
820 | void pcibios_fixup_bus(struct pci_bus *); | |
821 | int __must_check pcibios_enable_device(struct pci_dev *, int mask); | |
822 | /* Architecture-specific versions may override this (weak) */ | |
823 | char *pcibios_setup(char *str); | |
824 | ||
825 | /* Used only when drivers/pci/setup.c is used */ | |
826 | resource_size_t pcibios_align_resource(void *, const struct resource *, | |
827 | resource_size_t, | |
828 | resource_size_t); | |
829 | void pcibios_update_irq(struct pci_dev *, int irq); | |
830 | ||
831 | /* Weak but can be overriden by arch */ | |
832 | void pci_fixup_cardbus(struct pci_bus *); | |
833 | ||
834 | /* Generic PCI functions used internally */ | |
835 | ||
836 | void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region, | |
837 | struct resource *res); | |
838 | void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res, | |
839 | struct pci_bus_region *region); | |
840 | void pcibios_scan_specific_bus(int busn); | |
841 | struct pci_bus *pci_find_bus(int domain, int busnr); | |
842 | void pci_bus_add_devices(const struct pci_bus *bus); | |
843 | struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata); | |
844 | struct pci_bus *pci_create_root_bus(struct device *parent, int bus, | |
845 | struct pci_ops *ops, void *sysdata, | |
846 | struct list_head *resources); | |
847 | int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax); | |
848 | int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax); | |
849 | void pci_bus_release_busn_res(struct pci_bus *b); | |
850 | struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus, | |
851 | struct pci_ops *ops, void *sysdata, | |
852 | struct list_head *resources, | |
853 | struct msi_controller *msi); | |
854 | struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, | |
855 | struct pci_ops *ops, void *sysdata, | |
856 | struct list_head *resources); | |
857 | struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, | |
858 | int busnr); | |
859 | void pcie_update_link_speed(struct pci_bus *bus, u16 link_status); | |
860 | struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr, | |
861 | const char *name, | |
862 | struct hotplug_slot *hotplug); | |
863 | void pci_destroy_slot(struct pci_slot *slot); | |
864 | #ifdef CONFIG_SYSFS | |
865 | void pci_dev_assign_slot(struct pci_dev *dev); | |
866 | #else | |
867 | static inline void pci_dev_assign_slot(struct pci_dev *dev) { } | |
868 | #endif | |
869 | int pci_scan_slot(struct pci_bus *bus, int devfn); | |
870 | struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn); | |
871 | void pci_device_add(struct pci_dev *dev, struct pci_bus *bus); | |
872 | unsigned int pci_scan_child_bus(struct pci_bus *bus); | |
873 | void pci_bus_add_device(struct pci_dev *dev); | |
874 | void pci_read_bridge_bases(struct pci_bus *child); | |
875 | struct resource *pci_find_parent_resource(const struct pci_dev *dev, | |
876 | struct resource *res); | |
877 | struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev); | |
878 | u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin); | |
879 | int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge); | |
880 | u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp); | |
881 | struct pci_dev *pci_dev_get(struct pci_dev *dev); | |
882 | void pci_dev_put(struct pci_dev *dev); | |
883 | void pci_remove_bus(struct pci_bus *b); | |
884 | void pci_stop_and_remove_bus_device(struct pci_dev *dev); | |
885 | void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev); | |
886 | void pci_stop_root_bus(struct pci_bus *bus); | |
887 | void pci_remove_root_bus(struct pci_bus *bus); | |
888 | void pci_setup_cardbus(struct pci_bus *bus); | |
889 | void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type); | |
890 | void pci_sort_breadthfirst(void); | |
891 | #define dev_is_pci(d) ((d)->bus == &pci_bus_type) | |
892 | #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false)) | |
893 | ||
894 | /* Generic PCI functions exported to card drivers */ | |
895 | ||
896 | enum pci_lost_interrupt_reason { | |
897 | PCI_LOST_IRQ_NO_INFORMATION = 0, | |
898 | PCI_LOST_IRQ_DISABLE_MSI, | |
899 | PCI_LOST_IRQ_DISABLE_MSIX, | |
900 | PCI_LOST_IRQ_DISABLE_ACPI, | |
901 | }; | |
902 | enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev); | |
903 | int pci_find_capability(struct pci_dev *dev, int cap); | |
904 | int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap); | |
905 | int pci_find_ext_capability(struct pci_dev *dev, int cap); | |
906 | int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap); | |
907 | int pci_find_ht_capability(struct pci_dev *dev, int ht_cap); | |
908 | int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap); | |
909 | struct pci_bus *pci_find_next_bus(const struct pci_bus *from); | |
910 | ||
911 | struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device, | |
912 | struct pci_dev *from); | |
913 | struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device, | |
914 | unsigned int ss_vendor, unsigned int ss_device, | |
915 | struct pci_dev *from); | |
916 | struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn); | |
917 | struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus, | |
918 | unsigned int devfn); | |
919 | static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, | |
920 | unsigned int devfn) | |
921 | { | |
922 | return pci_get_domain_bus_and_slot(0, bus, devfn); | |
923 | } | |
924 | struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from); | |
925 | int pci_dev_present(const struct pci_device_id *ids); | |
926 | ||
927 | int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn, | |
928 | int where, u8 *val); | |
929 | int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn, | |
930 | int where, u16 *val); | |
931 | int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn, | |
932 | int where, u32 *val); | |
933 | int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn, | |
934 | int where, u8 val); | |
935 | int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn, | |
936 | int where, u16 val); | |
937 | int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn, | |
938 | int where, u32 val); | |
939 | ||
940 | int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn, | |
941 | int where, int size, u32 *val); | |
942 | int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn, | |
943 | int where, int size, u32 val); | |
944 | int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn, | |
945 | int where, int size, u32 *val); | |
946 | int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn, | |
947 | int where, int size, u32 val); | |
948 | ||
949 | struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops); | |
950 | ||
951 | int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val); | |
952 | int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val); | |
953 | int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val); | |
954 | int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val); | |
955 | int pci_write_config_word(const struct pci_dev *dev, int where, u16 val); | |
956 | int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val); | |
957 | ||
958 | int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val); | |
959 | int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val); | |
960 | int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val); | |
961 | int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val); | |
962 | int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos, | |
963 | u16 clear, u16 set); | |
964 | int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos, | |
965 | u32 clear, u32 set); | |
966 | ||
967 | static inline int pcie_capability_set_word(struct pci_dev *dev, int pos, | |
968 | u16 set) | |
969 | { | |
970 | return pcie_capability_clear_and_set_word(dev, pos, 0, set); | |
971 | } | |
972 | ||
973 | static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos, | |
974 | u32 set) | |
975 | { | |
976 | return pcie_capability_clear_and_set_dword(dev, pos, 0, set); | |
977 | } | |
978 | ||
979 | static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos, | |
980 | u16 clear) | |
981 | { | |
982 | return pcie_capability_clear_and_set_word(dev, pos, clear, 0); | |
983 | } | |
984 | ||
985 | static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos, | |
986 | u32 clear) | |
987 | { | |
988 | return pcie_capability_clear_and_set_dword(dev, pos, clear, 0); | |
989 | } | |
990 | ||
991 | /* user-space driven config access */ | |
992 | int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); | |
993 | int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val); | |
994 | int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val); | |
995 | int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val); | |
996 | int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val); | |
997 | int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val); | |
998 | ||
999 | int __must_check pci_enable_device(struct pci_dev *dev); | |
1000 | int __must_check pci_enable_device_io(struct pci_dev *dev); | |
1001 | int __must_check pci_enable_device_mem(struct pci_dev *dev); | |
1002 | int __must_check pci_reenable_device(struct pci_dev *); | |
1003 | int __must_check pcim_enable_device(struct pci_dev *pdev); | |
1004 | void pcim_pin_device(struct pci_dev *pdev); | |
1005 | ||
1006 | static inline int pci_is_enabled(struct pci_dev *pdev) | |
1007 | { | |
1008 | return (atomic_read(&pdev->enable_cnt) > 0); | |
1009 | } | |
1010 | ||
1011 | static inline int pci_is_managed(struct pci_dev *pdev) | |
1012 | { | |
1013 | return pdev->is_managed; | |
1014 | } | |
1015 | ||
1016 | void pci_disable_device(struct pci_dev *dev); | |
1017 | ||
1018 | extern unsigned int pcibios_max_latency; | |
1019 | void pci_set_master(struct pci_dev *dev); | |
1020 | void pci_clear_master(struct pci_dev *dev); | |
1021 | ||
1022 | int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state); | |
1023 | int pci_set_cacheline_size(struct pci_dev *dev); | |
1024 | #define HAVE_PCI_SET_MWI | |
1025 | int __must_check pci_set_mwi(struct pci_dev *dev); | |
1026 | int pci_try_set_mwi(struct pci_dev *dev); | |
1027 | void pci_clear_mwi(struct pci_dev *dev); | |
1028 | void pci_intx(struct pci_dev *dev, int enable); | |
1029 | bool pci_intx_mask_supported(struct pci_dev *dev); | |
1030 | bool pci_check_and_mask_intx(struct pci_dev *dev); | |
1031 | bool pci_check_and_unmask_intx(struct pci_dev *dev); | |
1032 | int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask); | |
1033 | int pci_wait_for_pending_transaction(struct pci_dev *dev); | |
1034 | int pcix_get_max_mmrbc(struct pci_dev *dev); | |
1035 | int pcix_get_mmrbc(struct pci_dev *dev); | |
1036 | int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc); | |
1037 | int pcie_get_readrq(struct pci_dev *dev); | |
1038 | int pcie_set_readrq(struct pci_dev *dev, int rq); | |
1039 | int pcie_get_mps(struct pci_dev *dev); | |
1040 | int pcie_set_mps(struct pci_dev *dev, int mps); | |
1041 | int pcie_get_minimum_link(struct pci_dev *dev, enum pci_bus_speed *speed, | |
1042 | enum pcie_link_width *width); | |
1043 | void pcie_flr(struct pci_dev *dev); | |
1044 | int __pci_reset_function(struct pci_dev *dev); | |
1045 | int __pci_reset_function_locked(struct pci_dev *dev); | |
1046 | int pci_reset_function(struct pci_dev *dev); | |
1047 | int pci_try_reset_function(struct pci_dev *dev); | |
1048 | int pci_probe_reset_slot(struct pci_slot *slot); | |
1049 | int pci_reset_slot(struct pci_slot *slot); | |
1050 | int pci_try_reset_slot(struct pci_slot *slot); | |
1051 | int pci_probe_reset_bus(struct pci_bus *bus); | |
1052 | int pci_reset_bus(struct pci_bus *bus); | |
1053 | int pci_try_reset_bus(struct pci_bus *bus); | |
1054 | void pci_reset_secondary_bus(struct pci_dev *dev); | |
1055 | void pcibios_reset_secondary_bus(struct pci_dev *dev); | |
1056 | void pci_reset_bridge_secondary_bus(struct pci_dev *dev); | |
1057 | void pci_update_resource(struct pci_dev *dev, int resno); | |
1058 | int __must_check pci_assign_resource(struct pci_dev *dev, int i); | |
1059 | int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align); | |
1060 | int pci_select_bars(struct pci_dev *dev, unsigned long flags); | |
1061 | bool pci_device_is_present(struct pci_dev *pdev); | |
1062 | void pci_ignore_hotplug(struct pci_dev *dev); | |
1063 | ||
1064 | int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr, | |
1065 | irq_handler_t handler, irq_handler_t thread_fn, void *dev_id, | |
1066 | const char *fmt, ...); | |
1067 | void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id); | |
1068 | ||
1069 | /* ROM control related routines */ | |
1070 | int pci_enable_rom(struct pci_dev *pdev); | |
1071 | void pci_disable_rom(struct pci_dev *pdev); | |
1072 | void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size); | |
1073 | void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom); | |
1074 | size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size); | |
1075 | void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size); | |
1076 | ||
1077 | /* Power management related routines */ | |
1078 | int pci_save_state(struct pci_dev *dev); | |
1079 | void pci_restore_state(struct pci_dev *dev); | |
1080 | struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev); | |
1081 | int pci_load_saved_state(struct pci_dev *dev, | |
1082 | struct pci_saved_state *state); | |
1083 | int pci_load_and_free_saved_state(struct pci_dev *dev, | |
1084 | struct pci_saved_state **state); | |
1085 | struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap); | |
1086 | struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev, | |
1087 | u16 cap); | |
1088 | int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size); | |
1089 | int pci_add_ext_cap_save_buffer(struct pci_dev *dev, | |
1090 | u16 cap, unsigned int size); | |
1091 | int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state); | |
1092 | int pci_set_power_state(struct pci_dev *dev, pci_power_t state); | |
1093 | pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state); | |
1094 | bool pci_pme_capable(struct pci_dev *dev, pci_power_t state); | |
1095 | void pci_pme_active(struct pci_dev *dev, bool enable); | |
1096 | int __pci_enable_wake(struct pci_dev *dev, pci_power_t state, | |
1097 | bool runtime, bool enable); | |
1098 | int pci_wake_from_d3(struct pci_dev *dev, bool enable); | |
1099 | int pci_prepare_to_sleep(struct pci_dev *dev); | |
1100 | int pci_back_from_sleep(struct pci_dev *dev); | |
1101 | bool pci_dev_run_wake(struct pci_dev *dev); | |
1102 | bool pci_check_pme_status(struct pci_dev *dev); | |
1103 | void pci_pme_wakeup_bus(struct pci_bus *bus); | |
1104 | void pci_d3cold_enable(struct pci_dev *dev); | |
1105 | void pci_d3cold_disable(struct pci_dev *dev); | |
1106 | ||
1107 | static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, | |
1108 | bool enable) | |
1109 | { | |
1110 | return __pci_enable_wake(dev, state, false, enable); | |
1111 | } | |
1112 | ||
1113 | /* PCI Virtual Channel */ | |
1114 | int pci_save_vc_state(struct pci_dev *dev); | |
1115 | void pci_restore_vc_state(struct pci_dev *dev); | |
1116 | void pci_allocate_vc_save_buffers(struct pci_dev *dev); | |
1117 | ||
1118 | /* For use by arch with custom probe code */ | |
1119 | void set_pcie_port_type(struct pci_dev *pdev); | |
1120 | void set_pcie_hotplug_bridge(struct pci_dev *pdev); | |
1121 | ||
1122 | /* Functions for PCI Hotplug drivers to use */ | |
1123 | int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap); | |
1124 | unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge); | |
1125 | unsigned int pci_rescan_bus(struct pci_bus *bus); | |
1126 | void pci_lock_rescan_remove(void); | |
1127 | void pci_unlock_rescan_remove(void); | |
1128 | ||
1129 | /* Vital product data routines */ | |
1130 | ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf); | |
1131 | ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); | |
1132 | int pci_set_vpd_size(struct pci_dev *dev, size_t len); | |
1133 | ||
1134 | /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */ | |
1135 | resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx); | |
1136 | void pci_bus_assign_resources(const struct pci_bus *bus); | |
1137 | void pci_bus_claim_resources(struct pci_bus *bus); | |
1138 | void pci_bus_size_bridges(struct pci_bus *bus); | |
1139 | int pci_claim_resource(struct pci_dev *, int); | |
1140 | int pci_claim_bridge_resource(struct pci_dev *bridge, int i); | |
1141 | void pci_assign_unassigned_resources(void); | |
1142 | void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge); | |
1143 | void pci_assign_unassigned_bus_resources(struct pci_bus *bus); | |
1144 | void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus); | |
1145 | void pdev_enable_device(struct pci_dev *); | |
1146 | int pci_enable_resources(struct pci_dev *, int mask); | |
1147 | void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *), | |
1148 | int (*)(const struct pci_dev *, u8, u8)); | |
1149 | struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res); | |
1150 | #define HAVE_PCI_REQ_REGIONS 2 | |
1151 | int __must_check pci_request_regions(struct pci_dev *, const char *); | |
1152 | int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *); | |
1153 | void pci_release_regions(struct pci_dev *); | |
1154 | int __must_check pci_request_region(struct pci_dev *, int, const char *); | |
1155 | int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *); | |
1156 | void pci_release_region(struct pci_dev *, int); | |
1157 | int pci_request_selected_regions(struct pci_dev *, int, const char *); | |
1158 | int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *); | |
1159 | void pci_release_selected_regions(struct pci_dev *, int); | |
1160 | ||
1161 | /* drivers/pci/bus.c */ | |
1162 | struct pci_bus *pci_bus_get(struct pci_bus *bus); | |
1163 | void pci_bus_put(struct pci_bus *bus); | |
1164 | void pci_add_resource(struct list_head *resources, struct resource *res); | |
1165 | void pci_add_resource_offset(struct list_head *resources, struct resource *res, | |
1166 | resource_size_t offset); | |
1167 | void pci_free_resource_list(struct list_head *resources); | |
1168 | void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, | |
1169 | unsigned int flags); | |
1170 | struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n); | |
1171 | void pci_bus_remove_resources(struct pci_bus *bus); | |
1172 | int devm_request_pci_bus_resources(struct device *dev, | |
1173 | struct list_head *resources); | |
1174 | ||
1175 | #define pci_bus_for_each_resource(bus, res, i) \ | |
1176 | for (i = 0; \ | |
1177 | (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \ | |
1178 | i++) | |
1179 | ||
1180 | int __must_check pci_bus_alloc_resource(struct pci_bus *bus, | |
1181 | struct resource *res, resource_size_t size, | |
1182 | resource_size_t align, resource_size_t min, | |
1183 | unsigned long type_mask, | |
1184 | resource_size_t (*alignf)(void *, | |
1185 | const struct resource *, | |
1186 | resource_size_t, | |
1187 | resource_size_t), | |
1188 | void *alignf_data); | |
1189 | ||
1190 | ||
1191 | int pci_register_io_range(phys_addr_t addr, resource_size_t size); | |
1192 | unsigned long pci_address_to_pio(phys_addr_t addr); | |
1193 | phys_addr_t pci_pio_to_address(unsigned long pio); | |
1194 | int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr); | |
1195 | void pci_unmap_iospace(struct resource *res); | |
1196 | void __iomem *devm_pci_remap_cfgspace(struct device *dev, | |
1197 | resource_size_t offset, | |
1198 | resource_size_t size); | |
1199 | void __iomem *devm_pci_remap_cfg_resource(struct device *dev, | |
1200 | struct resource *res); | |
1201 | ||
1202 | static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar) | |
1203 | { | |
1204 | struct pci_bus_region region; | |
1205 | ||
1206 | pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]); | |
1207 | return region.start; | |
1208 | } | |
1209 | ||
1210 | /* Proper probing supporting hot-pluggable devices */ | |
1211 | int __must_check __pci_register_driver(struct pci_driver *, struct module *, | |
1212 | const char *mod_name); | |
1213 | ||
1214 | /* | |
1215 | * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded | |
1216 | */ | |
1217 | #define pci_register_driver(driver) \ | |
1218 | __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) | |
1219 | ||
1220 | void pci_unregister_driver(struct pci_driver *dev); | |
1221 | ||
1222 | /** | |
1223 | * module_pci_driver() - Helper macro for registering a PCI driver | |
1224 | * @__pci_driver: pci_driver struct | |
1225 | * | |
1226 | * Helper macro for PCI drivers which do not do anything special in module | |
1227 | * init/exit. This eliminates a lot of boilerplate. Each module may only | |
1228 | * use this macro once, and calling it replaces module_init() and module_exit() | |
1229 | */ | |
1230 | #define module_pci_driver(__pci_driver) \ | |
1231 | module_driver(__pci_driver, pci_register_driver, \ | |
1232 | pci_unregister_driver) | |
1233 | ||
1234 | /** | |
1235 | * builtin_pci_driver() - Helper macro for registering a PCI driver | |
1236 | * @__pci_driver: pci_driver struct | |
1237 | * | |
1238 | * Helper macro for PCI drivers which do not do anything special in their | |
1239 | * init code. This eliminates a lot of boilerplate. Each driver may only | |
1240 | * use this macro once, and calling it replaces device_initcall(...) | |
1241 | */ | |
1242 | #define builtin_pci_driver(__pci_driver) \ | |
1243 | builtin_driver(__pci_driver, pci_register_driver) | |
1244 | ||
1245 | struct pci_driver *pci_dev_driver(const struct pci_dev *dev); | |
1246 | int pci_add_dynid(struct pci_driver *drv, | |
1247 | unsigned int vendor, unsigned int device, | |
1248 | unsigned int subvendor, unsigned int subdevice, | |
1249 | unsigned int class, unsigned int class_mask, | |
1250 | unsigned long driver_data); | |
1251 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, | |
1252 | struct pci_dev *dev); | |
1253 | int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, | |
1254 | int pass); | |
1255 | ||
1256 | void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *), | |
1257 | void *userdata); | |
1258 | int pci_cfg_space_size(struct pci_dev *dev); | |
1259 | unsigned char pci_bus_max_busnr(struct pci_bus *bus); | |
1260 | void pci_setup_bridge(struct pci_bus *bus); | |
1261 | resource_size_t pcibios_window_alignment(struct pci_bus *bus, | |
1262 | unsigned long type); | |
1263 | resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno); | |
1264 | ||
1265 | #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0) | |
1266 | #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1) | |
1267 | ||
1268 | int pci_set_vga_state(struct pci_dev *pdev, bool decode, | |
1269 | unsigned int command_bits, u32 flags); | |
1270 | ||
1271 | #define PCI_IRQ_LEGACY (1 << 0) /* allow legacy interrupts */ | |
1272 | #define PCI_IRQ_MSI (1 << 1) /* allow MSI interrupts */ | |
1273 | #define PCI_IRQ_MSIX (1 << 2) /* allow MSI-X interrupts */ | |
1274 | #define PCI_IRQ_AFFINITY (1 << 3) /* auto-assign affinity */ | |
1275 | #define PCI_IRQ_ALL_TYPES \ | |
1276 | (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX) | |
1277 | ||
1278 | /* kmem_cache style wrapper around pci_alloc_consistent() */ | |
1279 | ||
1280 | #include <linux/pci-dma.h> | |
1281 | #include <linux/dmapool.h> | |
1282 | ||
1283 | #define pci_pool dma_pool | |
1284 | #define pci_pool_create(name, pdev, size, align, allocation) \ | |
1285 | dma_pool_create(name, &pdev->dev, size, align, allocation) | |
1286 | #define pci_pool_destroy(pool) dma_pool_destroy(pool) | |
1287 | #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle) | |
1288 | #define pci_pool_zalloc(pool, flags, handle) \ | |
1289 | dma_pool_zalloc(pool, flags, handle) | |
1290 | #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr) | |
1291 | ||
1292 | struct msix_entry { | |
1293 | u32 vector; /* kernel uses to write allocated vector */ | |
1294 | u16 entry; /* driver uses to specify entry, OS writes */ | |
1295 | }; | |
1296 | ||
1297 | #ifdef CONFIG_PCI_MSI | |
1298 | int pci_msi_vec_count(struct pci_dev *dev); | |
1299 | void pci_disable_msi(struct pci_dev *dev); | |
1300 | int pci_msix_vec_count(struct pci_dev *dev); | |
1301 | void pci_disable_msix(struct pci_dev *dev); | |
1302 | void pci_restore_msi_state(struct pci_dev *dev); | |
1303 | int pci_msi_enabled(void); | |
1304 | int pci_enable_msi(struct pci_dev *dev); | |
1305 | int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, | |
1306 | int minvec, int maxvec); | |
1307 | static inline int pci_enable_msix_exact(struct pci_dev *dev, | |
1308 | struct msix_entry *entries, int nvec) | |
1309 | { | |
1310 | int rc = pci_enable_msix_range(dev, entries, nvec, nvec); | |
1311 | if (rc < 0) | |
1312 | return rc; | |
1313 | return 0; | |
1314 | } | |
1315 | int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs, | |
1316 | unsigned int max_vecs, unsigned int flags, | |
1317 | const struct irq_affinity *affd); | |
1318 | ||
1319 | void pci_free_irq_vectors(struct pci_dev *dev); | |
1320 | int pci_irq_vector(struct pci_dev *dev, unsigned int nr); | |
1321 | const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec); | |
1322 | int pci_irq_get_node(struct pci_dev *pdev, int vec); | |
1323 | ||
1324 | #else | |
1325 | static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; } | |
1326 | static inline void pci_disable_msi(struct pci_dev *dev) { } | |
1327 | static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; } | |
1328 | static inline void pci_disable_msix(struct pci_dev *dev) { } | |
1329 | static inline void pci_restore_msi_state(struct pci_dev *dev) { } | |
1330 | static inline int pci_msi_enabled(void) { return 0; } | |
1331 | static inline int pci_enable_msi(struct pci_dev *dev) | |
1332 | { return -ENOSYS; } | |
1333 | static inline int pci_enable_msix_range(struct pci_dev *dev, | |
1334 | struct msix_entry *entries, int minvec, int maxvec) | |
1335 | { return -ENOSYS; } | |
1336 | static inline int pci_enable_msix_exact(struct pci_dev *dev, | |
1337 | struct msix_entry *entries, int nvec) | |
1338 | { return -ENOSYS; } | |
1339 | ||
1340 | static inline int | |
1341 | pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs, | |
1342 | unsigned int max_vecs, unsigned int flags, | |
1343 | const struct irq_affinity *aff_desc) | |
1344 | { | |
1345 | if (min_vecs > 1) | |
1346 | return -EINVAL; | |
1347 | return 1; | |
1348 | } | |
1349 | ||
1350 | static inline void pci_free_irq_vectors(struct pci_dev *dev) | |
1351 | { | |
1352 | } | |
1353 | ||
1354 | static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr) | |
1355 | { | |
1356 | if (WARN_ON_ONCE(nr > 0)) | |
1357 | return -EINVAL; | |
1358 | return dev->irq; | |
1359 | } | |
1360 | static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, | |
1361 | int vec) | |
1362 | { | |
1363 | return cpu_possible_mask; | |
1364 | } | |
1365 | ||
1366 | static inline int pci_irq_get_node(struct pci_dev *pdev, int vec) | |
1367 | { | |
1368 | return first_online_node; | |
1369 | } | |
1370 | #endif | |
1371 | ||
1372 | static inline int | |
1373 | pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs, | |
1374 | unsigned int max_vecs, unsigned int flags) | |
1375 | { | |
1376 | return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags, | |
1377 | NULL); | |
1378 | } | |
1379 | ||
1380 | #ifdef CONFIG_PCIEPORTBUS | |
1381 | extern bool pcie_ports_disabled; | |
1382 | extern bool pcie_ports_auto; | |
1383 | #else | |
1384 | #define pcie_ports_disabled true | |
1385 | #define pcie_ports_auto false | |
1386 | #endif | |
1387 | ||
1388 | #ifdef CONFIG_PCIEASPM | |
1389 | bool pcie_aspm_support_enabled(void); | |
1390 | #else | |
1391 | static inline bool pcie_aspm_support_enabled(void) { return false; } | |
1392 | #endif | |
1393 | ||
1394 | #ifdef CONFIG_PCIEAER | |
1395 | void pci_no_aer(void); | |
1396 | bool pci_aer_available(void); | |
1397 | int pci_aer_init(struct pci_dev *dev); | |
1398 | #else | |
1399 | static inline void pci_no_aer(void) { } | |
1400 | static inline bool pci_aer_available(void) { return false; } | |
1401 | static inline int pci_aer_init(struct pci_dev *d) { return -ENODEV; } | |
1402 | #endif | |
1403 | ||
1404 | #ifdef CONFIG_PCIE_ECRC | |
1405 | void pcie_set_ecrc_checking(struct pci_dev *dev); | |
1406 | void pcie_ecrc_get_policy(char *str); | |
1407 | #else | |
1408 | static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { } | |
1409 | static inline void pcie_ecrc_get_policy(char *str) { } | |
1410 | #endif | |
1411 | ||
1412 | #ifdef CONFIG_HT_IRQ | |
1413 | /* The functions a driver should call */ | |
1414 | int ht_create_irq(struct pci_dev *dev, int idx); | |
1415 | void ht_destroy_irq(unsigned int irq); | |
1416 | #endif /* CONFIG_HT_IRQ */ | |
1417 | ||
1418 | #ifdef CONFIG_PCI_ATS | |
1419 | /* Address Translation Service */ | |
1420 | void pci_ats_init(struct pci_dev *dev); | |
1421 | int pci_enable_ats(struct pci_dev *dev, int ps); | |
1422 | void pci_disable_ats(struct pci_dev *dev); | |
1423 | int pci_ats_queue_depth(struct pci_dev *dev); | |
1424 | #else | |
1425 | static inline void pci_ats_init(struct pci_dev *d) { } | |
1426 | static inline int pci_enable_ats(struct pci_dev *d, int ps) { return -ENODEV; } | |
1427 | static inline void pci_disable_ats(struct pci_dev *d) { } | |
1428 | static inline int pci_ats_queue_depth(struct pci_dev *d) { return -ENODEV; } | |
1429 | #endif | |
1430 | ||
1431 | #ifdef CONFIG_PCIE_PTM | |
1432 | int pci_enable_ptm(struct pci_dev *dev, u8 *granularity); | |
1433 | #else | |
1434 | static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity) | |
1435 | { return -EINVAL; } | |
1436 | #endif | |
1437 | ||
1438 | void pci_cfg_access_lock(struct pci_dev *dev); | |
1439 | bool pci_cfg_access_trylock(struct pci_dev *dev); | |
1440 | void pci_cfg_access_unlock(struct pci_dev *dev); | |
1441 | ||
1442 | /* | |
1443 | * PCI domain support. Sometimes called PCI segment (eg by ACPI), | |
1444 | * a PCI domain is defined to be a set of PCI buses which share | |
1445 | * configuration space. | |
1446 | */ | |
1447 | #ifdef CONFIG_PCI_DOMAINS | |
1448 | extern int pci_domains_supported; | |
1449 | int pci_get_new_domain_nr(void); | |
1450 | #else | |
1451 | enum { pci_domains_supported = 0 }; | |
1452 | static inline int pci_domain_nr(struct pci_bus *bus) { return 0; } | |
1453 | static inline int pci_proc_domain(struct pci_bus *bus) { return 0; } | |
1454 | static inline int pci_get_new_domain_nr(void) { return -ENOSYS; } | |
1455 | #endif /* CONFIG_PCI_DOMAINS */ | |
1456 | ||
1457 | /* | |
1458 | * Generic implementation for PCI domain support. If your | |
1459 | * architecture does not need custom management of PCI | |
1460 | * domains then this implementation will be used | |
1461 | */ | |
1462 | #ifdef CONFIG_PCI_DOMAINS_GENERIC | |
1463 | static inline int pci_domain_nr(struct pci_bus *bus) | |
1464 | { | |
1465 | return bus->domain_nr; | |
1466 | } | |
1467 | #ifdef CONFIG_ACPI | |
1468 | int acpi_pci_bus_find_domain_nr(struct pci_bus *bus); | |
1469 | #else | |
1470 | static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus) | |
1471 | { return 0; } | |
1472 | #endif | |
1473 | int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent); | |
1474 | #endif | |
1475 | ||
1476 | /* some architectures require additional setup to direct VGA traffic */ | |
1477 | typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode, | |
1478 | unsigned int command_bits, u32 flags); | |
1479 | void pci_register_set_vga_state(arch_set_vga_state_t func); | |
1480 | ||
1481 | static inline int | |
1482 | pci_request_io_regions(struct pci_dev *pdev, const char *name) | |
1483 | { | |
1484 | return pci_request_selected_regions(pdev, | |
1485 | pci_select_bars(pdev, IORESOURCE_IO), name); | |
1486 | } | |
1487 | ||
1488 | static inline void | |
1489 | pci_release_io_regions(struct pci_dev *pdev) | |
1490 | { | |
1491 | return pci_release_selected_regions(pdev, | |
1492 | pci_select_bars(pdev, IORESOURCE_IO)); | |
1493 | } | |
1494 | ||
1495 | static inline int | |
1496 | pci_request_mem_regions(struct pci_dev *pdev, const char *name) | |
1497 | { | |
1498 | return pci_request_selected_regions(pdev, | |
1499 | pci_select_bars(pdev, IORESOURCE_MEM), name); | |
1500 | } | |
1501 | ||
1502 | static inline void | |
1503 | pci_release_mem_regions(struct pci_dev *pdev) | |
1504 | { | |
1505 | return pci_release_selected_regions(pdev, | |
1506 | pci_select_bars(pdev, IORESOURCE_MEM)); | |
1507 | } | |
1508 | ||
1509 | #else /* CONFIG_PCI is not enabled */ | |
1510 | ||
1511 | static inline void pci_set_flags(int flags) { } | |
1512 | static inline void pci_add_flags(int flags) { } | |
1513 | static inline void pci_clear_flags(int flags) { } | |
1514 | static inline int pci_has_flag(int flag) { return 0; } | |
1515 | ||
1516 | /* | |
1517 | * If the system does not have PCI, clearly these return errors. Define | |
1518 | * these as simple inline functions to avoid hair in drivers. | |
1519 | */ | |
1520 | ||
1521 | #define _PCI_NOP(o, s, t) \ | |
1522 | static inline int pci_##o##_config_##s(struct pci_dev *dev, \ | |
1523 | int where, t val) \ | |
1524 | { return PCIBIOS_FUNC_NOT_SUPPORTED; } | |
1525 | ||
1526 | #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \ | |
1527 | _PCI_NOP(o, word, u16 x) \ | |
1528 | _PCI_NOP(o, dword, u32 x) | |
1529 | _PCI_NOP_ALL(read, *) | |
1530 | _PCI_NOP_ALL(write,) | |
1531 | ||
1532 | static inline struct pci_dev *pci_get_device(unsigned int vendor, | |
1533 | unsigned int device, | |
1534 | struct pci_dev *from) | |
1535 | { return NULL; } | |
1536 | ||
1537 | static inline struct pci_dev *pci_get_subsys(unsigned int vendor, | |
1538 | unsigned int device, | |
1539 | unsigned int ss_vendor, | |
1540 | unsigned int ss_device, | |
1541 | struct pci_dev *from) | |
1542 | { return NULL; } | |
1543 | ||
1544 | static inline struct pci_dev *pci_get_class(unsigned int class, | |
1545 | struct pci_dev *from) | |
1546 | { return NULL; } | |
1547 | ||
1548 | #define pci_dev_present(ids) (0) | |
1549 | #define no_pci_devices() (1) | |
1550 | #define pci_dev_put(dev) do { } while (0) | |
1551 | ||
1552 | static inline void pci_set_master(struct pci_dev *dev) { } | |
1553 | static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; } | |
1554 | static inline void pci_disable_device(struct pci_dev *dev) { } | |
1555 | static inline int pci_assign_resource(struct pci_dev *dev, int i) | |
1556 | { return -EBUSY; } | |
1557 | static inline int __pci_register_driver(struct pci_driver *drv, | |
1558 | struct module *owner) | |
1559 | { return 0; } | |
1560 | static inline int pci_register_driver(struct pci_driver *drv) | |
1561 | { return 0; } | |
1562 | static inline void pci_unregister_driver(struct pci_driver *drv) { } | |
1563 | static inline int pci_find_capability(struct pci_dev *dev, int cap) | |
1564 | { return 0; } | |
1565 | static inline int pci_find_next_capability(struct pci_dev *dev, u8 post, | |
1566 | int cap) | |
1567 | { return 0; } | |
1568 | static inline int pci_find_ext_capability(struct pci_dev *dev, int cap) | |
1569 | { return 0; } | |
1570 | ||
1571 | /* Power management related routines */ | |
1572 | static inline int pci_save_state(struct pci_dev *dev) { return 0; } | |
1573 | static inline void pci_restore_state(struct pci_dev *dev) { } | |
1574 | static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) | |
1575 | { return 0; } | |
1576 | static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable) | |
1577 | { return 0; } | |
1578 | static inline pci_power_t pci_choose_state(struct pci_dev *dev, | |
1579 | pm_message_t state) | |
1580 | { return PCI_D0; } | |
1581 | static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, | |
1582 | int enable) | |
1583 | { return 0; } | |
1584 | ||
1585 | static inline struct resource *pci_find_resource(struct pci_dev *dev, | |
1586 | struct resource *res) | |
1587 | { return NULL; } | |
1588 | static inline int pci_request_regions(struct pci_dev *dev, const char *res_name) | |
1589 | { return -EIO; } | |
1590 | static inline void pci_release_regions(struct pci_dev *dev) { } | |
1591 | ||
1592 | static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; } | |
1593 | ||
1594 | static inline void pci_block_cfg_access(struct pci_dev *dev) { } | |
1595 | static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev) | |
1596 | { return 0; } | |
1597 | static inline void pci_unblock_cfg_access(struct pci_dev *dev) { } | |
1598 | ||
1599 | static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from) | |
1600 | { return NULL; } | |
1601 | static inline struct pci_dev *pci_get_slot(struct pci_bus *bus, | |
1602 | unsigned int devfn) | |
1603 | { return NULL; } | |
1604 | static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, | |
1605 | unsigned int devfn) | |
1606 | { return NULL; } | |
1607 | ||
1608 | static inline int pci_domain_nr(struct pci_bus *bus) { return 0; } | |
1609 | static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; } | |
1610 | static inline int pci_get_new_domain_nr(void) { return -ENOSYS; } | |
1611 | ||
1612 | #define dev_is_pci(d) (false) | |
1613 | #define dev_is_pf(d) (false) | |
1614 | #endif /* CONFIG_PCI */ | |
1615 | ||
1616 | /* Include architecture-dependent settings and functions */ | |
1617 | ||
1618 | #include <asm/pci.h> | |
1619 | ||
1620 | /* These two functions provide almost identical functionality. Depennding | |
1621 | * on the architecture, one will be implemented as a wrapper around the | |
1622 | * other (in drivers/pci/mmap.c). | |
1623 | * | |
1624 | * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff | |
1625 | * is expected to be an offset within that region. | |
1626 | * | |
1627 | * pci_mmap_page_range() is the legacy architecture-specific interface, | |
1628 | * which accepts a "user visible" resource address converted by | |
1629 | * pci_resource_to_user(), as used in the legacy mmap() interface in | |
1630 | * /proc/bus/pci/. | |
1631 | */ | |
1632 | int pci_mmap_resource_range(struct pci_dev *dev, int bar, | |
1633 | struct vm_area_struct *vma, | |
1634 | enum pci_mmap_state mmap_state, int write_combine); | |
1635 | int pci_mmap_page_range(struct pci_dev *pdev, int bar, | |
1636 | struct vm_area_struct *vma, | |
1637 | enum pci_mmap_state mmap_state, int write_combine); | |
1638 | ||
1639 | #ifndef arch_can_pci_mmap_wc | |
1640 | #define arch_can_pci_mmap_wc() 0 | |
1641 | #endif | |
1642 | ||
1643 | #ifndef arch_can_pci_mmap_io | |
1644 | #define arch_can_pci_mmap_io() 0 | |
1645 | #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL) | |
1646 | #else | |
1647 | int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma); | |
1648 | #endif | |
1649 | ||
1650 | #ifndef pci_root_bus_fwnode | |
1651 | #define pci_root_bus_fwnode(bus) NULL | |
1652 | #endif | |
1653 | ||
1654 | /* these helpers provide future and backwards compatibility | |
1655 | * for accessing popular PCI BAR info */ | |
1656 | #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start) | |
1657 | #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end) | |
1658 | #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags) | |
1659 | #define pci_resource_len(dev,bar) \ | |
1660 | ((pci_resource_start((dev), (bar)) == 0 && \ | |
1661 | pci_resource_end((dev), (bar)) == \ | |
1662 | pci_resource_start((dev), (bar))) ? 0 : \ | |
1663 | \ | |
1664 | (pci_resource_end((dev), (bar)) - \ | |
1665 | pci_resource_start((dev), (bar)) + 1)) | |
1666 | ||
1667 | /* Similar to the helpers above, these manipulate per-pci_dev | |
1668 | * driver-specific data. They are really just a wrapper around | |
1669 | * the generic device structure functions of these calls. | |
1670 | */ | |
1671 | static inline void *pci_get_drvdata(struct pci_dev *pdev) | |
1672 | { | |
1673 | return dev_get_drvdata(&pdev->dev); | |
1674 | } | |
1675 | ||
1676 | static inline void pci_set_drvdata(struct pci_dev *pdev, void *data) | |
1677 | { | |
1678 | dev_set_drvdata(&pdev->dev, data); | |
1679 | } | |
1680 | ||
1681 | /* If you want to know what to call your pci_dev, ask this function. | |
1682 | * Again, it's a wrapper around the generic device. | |
1683 | */ | |
1684 | static inline const char *pci_name(const struct pci_dev *pdev) | |
1685 | { | |
1686 | return dev_name(&pdev->dev); | |
1687 | } | |
1688 | ||
1689 | ||
1690 | /* Some archs don't want to expose struct resource to userland as-is | |
1691 | * in sysfs and /proc | |
1692 | */ | |
1693 | #ifdef HAVE_ARCH_PCI_RESOURCE_TO_USER | |
1694 | void pci_resource_to_user(const struct pci_dev *dev, int bar, | |
1695 | const struct resource *rsrc, | |
1696 | resource_size_t *start, resource_size_t *end); | |
1697 | #else | |
1698 | static inline void pci_resource_to_user(const struct pci_dev *dev, int bar, | |
1699 | const struct resource *rsrc, resource_size_t *start, | |
1700 | resource_size_t *end) | |
1701 | { | |
1702 | *start = rsrc->start; | |
1703 | *end = rsrc->end; | |
1704 | } | |
1705 | #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */ | |
1706 | ||
1707 | ||
1708 | /* | |
1709 | * The world is not perfect and supplies us with broken PCI devices. | |
1710 | * For at least a part of these bugs we need a work-around, so both | |
1711 | * generic (drivers/pci/quirks.c) and per-architecture code can define | |
1712 | * fixup hooks to be called for particular buggy devices. | |
1713 | */ | |
1714 | ||
1715 | struct pci_fixup { | |
1716 | u16 vendor; /* You can use PCI_ANY_ID here of course */ | |
1717 | u16 device; /* You can use PCI_ANY_ID here of course */ | |
1718 | u32 class; /* You can use PCI_ANY_ID here too */ | |
1719 | unsigned int class_shift; /* should be 0, 8, 16 */ | |
1720 | void (*hook)(struct pci_dev *dev); | |
1721 | }; | |
1722 | ||
1723 | enum pci_fixup_pass { | |
1724 | pci_fixup_early, /* Before probing BARs */ | |
1725 | pci_fixup_header, /* After reading configuration header */ | |
1726 | pci_fixup_final, /* Final phase of device fixups */ | |
1727 | pci_fixup_enable, /* pci_enable_device() time */ | |
1728 | pci_fixup_resume, /* pci_device_resume() */ | |
1729 | pci_fixup_suspend, /* pci_device_suspend() */ | |
1730 | pci_fixup_resume_early, /* pci_device_resume_early() */ | |
1731 | pci_fixup_suspend_late, /* pci_device_suspend_late() */ | |
1732 | }; | |
1733 | ||
1734 | /* Anonymous variables would be nice... */ | |
1735 | #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \ | |
1736 | class_shift, hook) \ | |
1737 | static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \ | |
1738 | __attribute__((__section__(#section), aligned((sizeof(void *))))) \ | |
1739 | = { vendor, device, class, class_shift, hook }; | |
1740 | ||
1741 | #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \ | |
1742 | class_shift, hook) \ | |
1743 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ | |
1744 | hook, vendor, device, class, class_shift, hook) | |
1745 | #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \ | |
1746 | class_shift, hook) \ | |
1747 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ | |
1748 | hook, vendor, device, class, class_shift, hook) | |
1749 | #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \ | |
1750 | class_shift, hook) \ | |
1751 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ | |
1752 | hook, vendor, device, class, class_shift, hook) | |
1753 | #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \ | |
1754 | class_shift, hook) \ | |
1755 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ | |
1756 | hook, vendor, device, class, class_shift, hook) | |
1757 | #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \ | |
1758 | class_shift, hook) \ | |
1759 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ | |
1760 | resume##hook, vendor, device, class, \ | |
1761 | class_shift, hook) | |
1762 | #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \ | |
1763 | class_shift, hook) \ | |
1764 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ | |
1765 | resume_early##hook, vendor, device, \ | |
1766 | class, class_shift, hook) | |
1767 | #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \ | |
1768 | class_shift, hook) \ | |
1769 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ | |
1770 | suspend##hook, vendor, device, class, \ | |
1771 | class_shift, hook) | |
1772 | #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \ | |
1773 | class_shift, hook) \ | |
1774 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \ | |
1775 | suspend_late##hook, vendor, device, \ | |
1776 | class, class_shift, hook) | |
1777 | ||
1778 | #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \ | |
1779 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ | |
1780 | hook, vendor, device, PCI_ANY_ID, 0, hook) | |
1781 | #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \ | |
1782 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ | |
1783 | hook, vendor, device, PCI_ANY_ID, 0, hook) | |
1784 | #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \ | |
1785 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ | |
1786 | hook, vendor, device, PCI_ANY_ID, 0, hook) | |
1787 | #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \ | |
1788 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ | |
1789 | hook, vendor, device, PCI_ANY_ID, 0, hook) | |
1790 | #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \ | |
1791 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ | |
1792 | resume##hook, vendor, device, \ | |
1793 | PCI_ANY_ID, 0, hook) | |
1794 | #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \ | |
1795 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ | |
1796 | resume_early##hook, vendor, device, \ | |
1797 | PCI_ANY_ID, 0, hook) | |
1798 | #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \ | |
1799 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ | |
1800 | suspend##hook, vendor, device, \ | |
1801 | PCI_ANY_ID, 0, hook) | |
1802 | #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \ | |
1803 | DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \ | |
1804 | suspend_late##hook, vendor, device, \ | |
1805 | PCI_ANY_ID, 0, hook) | |
1806 | ||
1807 | #ifdef CONFIG_PCI_QUIRKS | |
1808 | void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev); | |
1809 | int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags); | |
1810 | int pci_dev_specific_enable_acs(struct pci_dev *dev); | |
1811 | #else | |
1812 | static inline void pci_fixup_device(enum pci_fixup_pass pass, | |
1813 | struct pci_dev *dev) { } | |
1814 | static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev, | |
1815 | u16 acs_flags) | |
1816 | { | |
1817 | return -ENOTTY; | |
1818 | } | |
1819 | static inline int pci_dev_specific_enable_acs(struct pci_dev *dev) | |
1820 | { | |
1821 | return -ENOTTY; | |
1822 | } | |
1823 | #endif | |
1824 | ||
1825 | void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen); | |
1826 | void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr); | |
1827 | void __iomem * const *pcim_iomap_table(struct pci_dev *pdev); | |
1828 | int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name); | |
1829 | int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask, | |
1830 | const char *name); | |
1831 | void pcim_iounmap_regions(struct pci_dev *pdev, int mask); | |
1832 | ||
1833 | extern int pci_pci_problems; | |
1834 | #define PCIPCI_FAIL 1 /* No PCI PCI DMA */ | |
1835 | #define PCIPCI_TRITON 2 | |
1836 | #define PCIPCI_NATOMA 4 | |
1837 | #define PCIPCI_VIAETBF 8 | |
1838 | #define PCIPCI_VSFX 16 | |
1839 | #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */ | |
1840 | #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */ | |
1841 | ||
1842 | extern unsigned long pci_cardbus_io_size; | |
1843 | extern unsigned long pci_cardbus_mem_size; | |
1844 | extern u8 pci_dfl_cache_line_size; | |
1845 | extern u8 pci_cache_line_size; | |
1846 | ||
1847 | extern unsigned long pci_hotplug_io_size; | |
1848 | extern unsigned long pci_hotplug_mem_size; | |
1849 | extern unsigned long pci_hotplug_bus_size; | |
1850 | ||
1851 | /* Architecture-specific versions may override these (weak) */ | |
1852 | void pcibios_disable_device(struct pci_dev *dev); | |
1853 | void pcibios_set_master(struct pci_dev *dev); | |
1854 | int pcibios_set_pcie_reset_state(struct pci_dev *dev, | |
1855 | enum pcie_reset_state state); | |
1856 | int pcibios_add_device(struct pci_dev *dev); | |
1857 | void pcibios_release_device(struct pci_dev *dev); | |
1858 | void pcibios_penalize_isa_irq(int irq, int active); | |
1859 | int pcibios_alloc_irq(struct pci_dev *dev); | |
1860 | void pcibios_free_irq(struct pci_dev *dev); | |
1861 | ||
1862 | #ifdef CONFIG_HIBERNATE_CALLBACKS | |
1863 | extern struct dev_pm_ops pcibios_pm_ops; | |
1864 | #endif | |
1865 | ||
1866 | #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG) | |
1867 | void __init pci_mmcfg_early_init(void); | |
1868 | void __init pci_mmcfg_late_init(void); | |
1869 | #else | |
1870 | static inline void pci_mmcfg_early_init(void) { } | |
1871 | static inline void pci_mmcfg_late_init(void) { } | |
1872 | #endif | |
1873 | ||
1874 | int pci_ext_cfg_avail(void); | |
1875 | ||
1876 | void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar); | |
1877 | void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar); | |
1878 | ||
1879 | #ifdef CONFIG_PCI_IOV | |
1880 | int pci_iov_virtfn_bus(struct pci_dev *dev, int id); | |
1881 | int pci_iov_virtfn_devfn(struct pci_dev *dev, int id); | |
1882 | ||
1883 | int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); | |
1884 | void pci_disable_sriov(struct pci_dev *dev); | |
1885 | int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset); | |
1886 | void pci_iov_remove_virtfn(struct pci_dev *dev, int id, int reset); | |
1887 | int pci_num_vf(struct pci_dev *dev); | |
1888 | int pci_vfs_assigned(struct pci_dev *dev); | |
1889 | int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs); | |
1890 | int pci_sriov_get_totalvfs(struct pci_dev *dev); | |
1891 | resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno); | |
1892 | #else | |
1893 | static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id) | |
1894 | { | |
1895 | return -ENOSYS; | |
1896 | } | |
1897 | static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id) | |
1898 | { | |
1899 | return -ENOSYS; | |
1900 | } | |
1901 | static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn) | |
1902 | { return -ENODEV; } | |
1903 | static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset) | |
1904 | { | |
1905 | return -ENOSYS; | |
1906 | } | |
1907 | static inline void pci_iov_remove_virtfn(struct pci_dev *dev, | |
1908 | int id, int reset) { } | |
1909 | static inline void pci_disable_sriov(struct pci_dev *dev) { } | |
1910 | static inline int pci_num_vf(struct pci_dev *dev) { return 0; } | |
1911 | static inline int pci_vfs_assigned(struct pci_dev *dev) | |
1912 | { return 0; } | |
1913 | static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs) | |
1914 | { return 0; } | |
1915 | static inline int pci_sriov_get_totalvfs(struct pci_dev *dev) | |
1916 | { return 0; } | |
1917 | static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno) | |
1918 | { return 0; } | |
1919 | #endif | |
1920 | ||
1921 | #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE) | |
1922 | void pci_hp_create_module_link(struct pci_slot *pci_slot); | |
1923 | void pci_hp_remove_module_link(struct pci_slot *pci_slot); | |
1924 | #endif | |
1925 | ||
1926 | /** | |
1927 | * pci_pcie_cap - get the saved PCIe capability offset | |
1928 | * @dev: PCI device | |
1929 | * | |
1930 | * PCIe capability offset is calculated at PCI device initialization | |
1931 | * time and saved in the data structure. This function returns saved | |
1932 | * PCIe capability offset. Using this instead of pci_find_capability() | |
1933 | * reduces unnecessary search in the PCI configuration space. If you | |
1934 | * need to calculate PCIe capability offset from raw device for some | |
1935 | * reasons, please use pci_find_capability() instead. | |
1936 | */ | |
1937 | static inline int pci_pcie_cap(struct pci_dev *dev) | |
1938 | { | |
1939 | return dev->pcie_cap; | |
1940 | } | |
1941 | ||
1942 | /** | |
1943 | * pci_is_pcie - check if the PCI device is PCI Express capable | |
1944 | * @dev: PCI device | |
1945 | * | |
1946 | * Returns: true if the PCI device is PCI Express capable, false otherwise. | |
1947 | */ | |
1948 | static inline bool pci_is_pcie(struct pci_dev *dev) | |
1949 | { | |
1950 | return pci_pcie_cap(dev); | |
1951 | } | |
1952 | ||
1953 | /** | |
1954 | * pcie_caps_reg - get the PCIe Capabilities Register | |
1955 | * @dev: PCI device | |
1956 | */ | |
1957 | static inline u16 pcie_caps_reg(const struct pci_dev *dev) | |
1958 | { | |
1959 | return dev->pcie_flags_reg; | |
1960 | } | |
1961 | ||
1962 | /** | |
1963 | * pci_pcie_type - get the PCIe device/port type | |
1964 | * @dev: PCI device | |
1965 | */ | |
1966 | static inline int pci_pcie_type(const struct pci_dev *dev) | |
1967 | { | |
1968 | return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4; | |
1969 | } | |
1970 | ||
1971 | static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev) | |
1972 | { | |
1973 | while (1) { | |
1974 | if (!pci_is_pcie(dev)) | |
1975 | break; | |
1976 | if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) | |
1977 | return dev; | |
1978 | if (!dev->bus->self) | |
1979 | break; | |
1980 | dev = dev->bus->self; | |
1981 | } | |
1982 | return NULL; | |
1983 | } | |
1984 | ||
1985 | void pci_request_acs(void); | |
1986 | bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); | |
1987 | bool pci_acs_path_enabled(struct pci_dev *start, | |
1988 | struct pci_dev *end, u16 acs_flags); | |
1989 | ||
1990 | #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */ | |
1991 | #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT) | |
1992 | ||
1993 | /* Large Resource Data Type Tag Item Names */ | |
1994 | #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */ | |
1995 | #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */ | |
1996 | #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */ | |
1997 | ||
1998 | #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING) | |
1999 | #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA) | |
2000 | #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA) | |
2001 | ||
2002 | /* Small Resource Data Type Tag Item Names */ | |
2003 | #define PCI_VPD_STIN_END 0x0f /* End */ | |
2004 | ||
2005 | #define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3) | |
2006 | ||
2007 | #define PCI_VPD_SRDT_TIN_MASK 0x78 | |
2008 | #define PCI_VPD_SRDT_LEN_MASK 0x07 | |
2009 | #define PCI_VPD_LRDT_TIN_MASK 0x7f | |
2010 | ||
2011 | #define PCI_VPD_LRDT_TAG_SIZE 3 | |
2012 | #define PCI_VPD_SRDT_TAG_SIZE 1 | |
2013 | ||
2014 | #define PCI_VPD_INFO_FLD_HDR_SIZE 3 | |
2015 | ||
2016 | #define PCI_VPD_RO_KEYWORD_PARTNO "PN" | |
2017 | #define PCI_VPD_RO_KEYWORD_MFR_ID "MN" | |
2018 | #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0" | |
2019 | #define PCI_VPD_RO_KEYWORD_CHKSUM "RV" | |
2020 | ||
2021 | /** | |
2022 | * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length | |
2023 | * @lrdt: Pointer to the beginning of the Large Resource Data Type tag | |
2024 | * | |
2025 | * Returns the extracted Large Resource Data Type length. | |
2026 | */ | |
2027 | static inline u16 pci_vpd_lrdt_size(const u8 *lrdt) | |
2028 | { | |
2029 | return (u16)lrdt[1] + ((u16)lrdt[2] << 8); | |
2030 | } | |
2031 | ||
2032 | /** | |
2033 | * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item | |
2034 | * @lrdt: Pointer to the beginning of the Large Resource Data Type tag | |
2035 | * | |
2036 | * Returns the extracted Large Resource Data Type Tag item. | |
2037 | */ | |
2038 | static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt) | |
2039 | { | |
2040 | return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK); | |
2041 | } | |
2042 | ||
2043 | /** | |
2044 | * pci_vpd_srdt_size - Extracts the Small Resource Data Type length | |
2045 | * @lrdt: Pointer to the beginning of the Small Resource Data Type tag | |
2046 | * | |
2047 | * Returns the extracted Small Resource Data Type length. | |
2048 | */ | |
2049 | static inline u8 pci_vpd_srdt_size(const u8 *srdt) | |
2050 | { | |
2051 | return (*srdt) & PCI_VPD_SRDT_LEN_MASK; | |
2052 | } | |
2053 | ||
2054 | /** | |
2055 | * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item | |
2056 | * @lrdt: Pointer to the beginning of the Small Resource Data Type tag | |
2057 | * | |
2058 | * Returns the extracted Small Resource Data Type Tag Item. | |
2059 | */ | |
2060 | static inline u8 pci_vpd_srdt_tag(const u8 *srdt) | |
2061 | { | |
2062 | return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3; | |
2063 | } | |
2064 | ||
2065 | /** | |
2066 | * pci_vpd_info_field_size - Extracts the information field length | |
2067 | * @lrdt: Pointer to the beginning of an information field header | |
2068 | * | |
2069 | * Returns the extracted information field length. | |
2070 | */ | |
2071 | static inline u8 pci_vpd_info_field_size(const u8 *info_field) | |
2072 | { | |
2073 | return info_field[2]; | |
2074 | } | |
2075 | ||
2076 | /** | |
2077 | * pci_vpd_find_tag - Locates the Resource Data Type tag provided | |
2078 | * @buf: Pointer to buffered vpd data | |
2079 | * @off: The offset into the buffer at which to begin the search | |
2080 | * @len: The length of the vpd buffer | |
2081 | * @rdt: The Resource Data Type to search for | |
2082 | * | |
2083 | * Returns the index where the Resource Data Type was found or | |
2084 | * -ENOENT otherwise. | |
2085 | */ | |
2086 | int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt); | |
2087 | ||
2088 | /** | |
2089 | * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD | |
2090 | * @buf: Pointer to buffered vpd data | |
2091 | * @off: The offset into the buffer at which to begin the search | |
2092 | * @len: The length of the buffer area, relative to off, in which to search | |
2093 | * @kw: The keyword to search for | |
2094 | * | |
2095 | * Returns the index where the information field keyword was found or | |
2096 | * -ENOENT otherwise. | |
2097 | */ | |
2098 | int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off, | |
2099 | unsigned int len, const char *kw); | |
2100 | ||
2101 | /* PCI <-> OF binding helpers */ | |
2102 | #ifdef CONFIG_OF | |
2103 | struct device_node; | |
2104 | struct irq_domain; | |
2105 | void pci_set_of_node(struct pci_dev *dev); | |
2106 | void pci_release_of_node(struct pci_dev *dev); | |
2107 | void pci_set_bus_of_node(struct pci_bus *bus); | |
2108 | void pci_release_bus_of_node(struct pci_bus *bus); | |
2109 | struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus); | |
2110 | ||
2111 | /* Arch may override this (weak) */ | |
2112 | struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus); | |
2113 | ||
2114 | static inline struct device_node * | |
2115 | pci_device_to_OF_node(const struct pci_dev *pdev) | |
2116 | { | |
2117 | return pdev ? pdev->dev.of_node : NULL; | |
2118 | } | |
2119 | ||
2120 | static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) | |
2121 | { | |
2122 | return bus ? bus->dev.of_node : NULL; | |
2123 | } | |
2124 | ||
2125 | #else /* CONFIG_OF */ | |
2126 | static inline void pci_set_of_node(struct pci_dev *dev) { } | |
2127 | static inline void pci_release_of_node(struct pci_dev *dev) { } | |
2128 | static inline void pci_set_bus_of_node(struct pci_bus *bus) { } | |
2129 | static inline void pci_release_bus_of_node(struct pci_bus *bus) { } | |
2130 | static inline struct device_node * | |
2131 | pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; } | |
2132 | static inline struct irq_domain * | |
2133 | pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; } | |
2134 | #endif /* CONFIG_OF */ | |
2135 | ||
2136 | #ifdef CONFIG_ACPI | |
2137 | struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus); | |
2138 | ||
2139 | void | |
2140 | pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *)); | |
2141 | #else | |
2142 | static inline struct irq_domain * | |
2143 | pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; } | |
2144 | #endif | |
2145 | ||
2146 | #ifdef CONFIG_EEH | |
2147 | static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev) | |
2148 | { | |
2149 | return pdev->dev.archdata.edev; | |
2150 | } | |
2151 | #endif | |
2152 | ||
2153 | void pci_add_dma_alias(struct pci_dev *dev, u8 devfn); | |
2154 | bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2); | |
2155 | int pci_for_each_dma_alias(struct pci_dev *pdev, | |
2156 | int (*fn)(struct pci_dev *pdev, | |
2157 | u16 alias, void *data), void *data); | |
2158 | ||
2159 | /* helper functions for operation of device flag */ | |
2160 | static inline void pci_set_dev_assigned(struct pci_dev *pdev) | |
2161 | { | |
2162 | pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED; | |
2163 | } | |
2164 | static inline void pci_clear_dev_assigned(struct pci_dev *pdev) | |
2165 | { | |
2166 | pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED; | |
2167 | } | |
2168 | static inline bool pci_is_dev_assigned(struct pci_dev *pdev) | |
2169 | { | |
2170 | return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED; | |
2171 | } | |
2172 | ||
2173 | /** | |
2174 | * pci_ari_enabled - query ARI forwarding status | |
2175 | * @bus: the PCI bus | |
2176 | * | |
2177 | * Returns true if ARI forwarding is enabled. | |
2178 | */ | |
2179 | static inline bool pci_ari_enabled(struct pci_bus *bus) | |
2180 | { | |
2181 | return bus->self && bus->self->ari_enabled; | |
2182 | } | |
2183 | ||
2184 | /** | |
2185 | * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain | |
2186 | * @pdev: PCI device to check | |
2187 | * | |
2188 | * Walk upwards from @pdev and check for each encountered bridge if it's part | |
2189 | * of a Thunderbolt controller. Reaching the host bridge means @pdev is not | |
2190 | * Thunderbolt-attached. (But rather soldered to the mainboard usually.) | |
2191 | */ | |
2192 | static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev) | |
2193 | { | |
2194 | struct pci_dev *parent = pdev; | |
2195 | ||
2196 | if (pdev->is_thunderbolt) | |
2197 | return true; | |
2198 | ||
2199 | while ((parent = pci_upstream_bridge(parent))) | |
2200 | if (parent->is_thunderbolt) | |
2201 | return true; | |
2202 | ||
2203 | return false; | |
2204 | } | |
2205 | ||
2206 | /* provide the legacy pci_dma_* API */ | |
2207 | #include <linux/pci-dma-compat.h> | |
2208 | ||
2209 | #endif /* LINUX_PCI_H */ |