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Linux/include/linux/pci.h

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

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