2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 1997, Stefan Esser <se@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice unmodified, this list of conditions, and the following
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include <sys/queue.h>
35 #include <sys/_eventhandler.h>
37 /* some PCI bus constants */
38 #define PCI_MAXMAPS_0 6 /* max. no. of memory/port maps */
39 #define PCI_MAXMAPS_1 2 /* max. no. of maps for PCI to PCI bridge */
40 #define PCI_MAXMAPS_2 1 /* max. no. of maps for CardBus bridge */
42 typedef uint64_t pci_addr_t;
44 /* Config registers for PCI-PCI and PCI-Cardbus bridges. */
45 struct pcicfg_bridge {
53 /* Interesting values for PCI power management */
55 uint16_t pp_cap; /* PCI power management capabilities */
56 uint8_t pp_status; /* conf. space addr. of PM control/status reg */
57 uint8_t pp_bse; /* conf. space addr. of PM BSE reg */
58 uint8_t pp_data; /* conf. space addr. of PM data reg */
62 pci_addr_t pm_value; /* Raw BAR value */
65 STAILQ_ENTRY(pci_map) pm_link;
82 uint8_t vpd_reg; /* base register, + 2 for addr, + 4 data */
84 char *vpd_ident; /* string identifier */
86 struct vpd_readonly *vpd_ros;
88 struct vpd_write *vpd_w;
91 /* Interesting values for PCI MSI */
93 uint16_t msi_ctrl; /* Message Control */
94 uint8_t msi_location; /* Offset of MSI capability registers. */
95 uint8_t msi_msgnum; /* Number of messages */
96 int msi_alloc; /* Number of allocated messages. */
97 uint64_t msi_addr; /* Contents of address register. */
98 uint16_t msi_data; /* Contents of data register. */
102 /* Interesting values for PCI MSI-X */
104 uint64_t mv_address; /* Contents of address register. */
105 uint32_t mv_data; /* Contents of data register. */
109 struct msix_table_entry {
110 u_int mte_vector; /* 1-based index into msix_vectors array. */
115 uint16_t msix_ctrl; /* Message Control */
116 uint16_t msix_msgnum; /* Number of messages */
117 uint8_t msix_location; /* Offset of MSI-X capability registers. */
118 uint8_t msix_table_bar; /* BAR containing vector table. */
119 uint8_t msix_pba_bar; /* BAR containing PBA. */
120 uint32_t msix_table_offset;
121 uint32_t msix_pba_offset;
122 int msix_alloc; /* Number of allocated vectors. */
123 int msix_table_len; /* Length of virtual table. */
124 struct msix_table_entry *msix_table; /* Virtual table. */
125 struct msix_vector *msix_vectors; /* Array of allocated vectors. */
126 struct resource *msix_table_res; /* Resource containing vector table. */
127 struct resource *msix_pba_res; /* Resource containing PBA. */
130 struct pci_id_ofw_iommu {
135 /* Interesting values for HyperTransport */
137 uint8_t ht_slave; /* Non-zero if device is an HT slave. */
138 uint8_t ht_msimap; /* Offset of MSI mapping cap registers. */
139 uint16_t ht_msictrl; /* MSI mapping control */
140 uint64_t ht_msiaddr; /* MSI mapping base address */
143 /* Interesting values for PCI-express */
145 uint8_t pcie_location; /* Offset of PCI-e capability registers. */
146 uint8_t pcie_type; /* Device type. */
147 uint16_t pcie_flags; /* Device capabilities register. */
148 uint16_t pcie_device_ctl; /* Device control register. */
149 uint16_t pcie_link_ctl; /* Link control register. */
150 uint16_t pcie_slot_ctl; /* Slot control register. */
151 uint16_t pcie_root_ctl; /* Root control register. */
152 uint16_t pcie_device_ctl2; /* Second device control register. */
153 uint16_t pcie_link_ctl2; /* Second link control register. */
154 uint16_t pcie_slot_ctl2; /* Second slot control register. */
158 uint16_t pcix_command;
159 uint8_t pcix_location; /* Offset of PCI-X capability registers. */
166 struct pci_ea_entry {
170 uint64_t eae_max_offset;
171 uint32_t eae_cfg_offset;
172 STAILQ_ENTRY(pci_ea_entry) eae_link;
176 int ea_location; /* Structure offset in Configuration Header */
177 STAILQ_HEAD(, pci_ea_entry) ea_entries; /* EA entries */
180 #define PCICFG_VF 0x0001 /* Device is an SR-IOV Virtual Function */
182 /* config header information common to all header types */
183 typedef struct pcicfg {
184 device_t dev; /* device which owns this */
186 STAILQ_HEAD(, pci_map) maps; /* BARs */
188 uint16_t subvendor; /* card vendor ID */
189 uint16_t subdevice; /* card device ID, assigned by card vendor */
190 uint16_t vendor; /* chip vendor ID */
191 uint16_t device; /* chip device ID, assigned by chip vendor */
193 uint16_t cmdreg; /* disable/enable chip and PCI options */
194 uint16_t statreg; /* supported PCI features and error state */
196 uint8_t baseclass; /* chip PCI class */
197 uint8_t subclass; /* chip PCI subclass */
198 uint8_t progif; /* chip PCI programming interface */
199 uint8_t revid; /* chip revision ID */
201 uint8_t hdrtype; /* chip config header type */
202 uint8_t cachelnsz; /* cache line size in 4byte units */
203 uint8_t intpin; /* PCI interrupt pin */
204 uint8_t intline; /* interrupt line (IRQ for PC arch) */
206 uint8_t mingnt; /* min. useful bus grant time in 250ns units */
207 uint8_t maxlat; /* max. tolerated bus grant latency in 250ns */
208 uint8_t lattimer; /* latency timer in units of 30ns bus cycles */
210 uint8_t mfdev; /* multi-function device (from hdrtype reg) */
211 uint8_t nummaps; /* actual number of PCI maps used */
213 uint32_t domain; /* PCI domain */
214 uint8_t bus; /* config space bus address */
215 uint8_t slot; /* config space slot address */
216 uint8_t func; /* config space function number */
218 uint32_t flags; /* flags defined above */
220 struct pcicfg_bridge bridge; /* Bridges */
221 struct pcicfg_pp pp; /* Power management */
222 struct pcicfg_vpd vpd; /* Vital product data */
223 struct pcicfg_msi msi; /* PCI MSI */
224 struct pcicfg_msix msix; /* PCI MSI-X */
225 struct pcicfg_ht ht; /* HyperTransport */
226 struct pcicfg_pcie pcie; /* PCI Express */
227 struct pcicfg_pcix pcix; /* PCI-X */
228 struct pcicfg_iov *iov; /* SR-IOV */
229 struct pcicfg_vf vf; /* SR-IOV Virtual Function */
230 struct pcicfg_ea ea; /* Enhanced Allocation */
233 /* additional type 1 device config header information (PCI to PCI bridge) */
236 pci_addr_t pmembase; /* base address of prefetchable memory */
237 pci_addr_t pmemlimit; /* topmost address of prefetchable memory */
238 uint32_t membase; /* base address of memory window */
239 uint32_t memlimit; /* topmost address of memory window */
240 uint32_t iobase; /* base address of port window */
241 uint32_t iolimit; /* topmost address of port window */
242 uint16_t secstat; /* secondary bus status register */
243 uint16_t bridgectl; /* bridge control register */
244 uint8_t seclat; /* CardBus latency timer */
247 /* additional type 2 device config header information (CardBus bridge) */
250 uint32_t membase0; /* base address of memory window */
251 uint32_t memlimit0; /* topmost address of memory window */
252 uint32_t membase1; /* base address of memory window */
253 uint32_t memlimit1; /* topmost address of memory window */
254 uint32_t iobase0; /* base address of port window */
255 uint32_t iolimit0; /* topmost address of port window */
256 uint32_t iobase1; /* base address of port window */
257 uint32_t iolimit1; /* topmost address of port window */
258 uint32_t pccardif; /* PC Card 16bit IF legacy more base addr. */
259 uint16_t secstat; /* secondary bus status register */
260 uint16_t bridgectl; /* bridge control register */
261 uint8_t seclat; /* CardBus latency timer */
264 extern uint32_t pci_numdevs;
265 extern int pci_enable_aspm;
268 * The bitfield has to be stable and match the fields below (so that
269 * match_flag_vendor must be bit 0) so we have to do the endian dance. We can't
270 * use enums or #define constants because then the macros for subsetting matches
271 * wouldn't work. These tables are parsed by devmatch and others to connect
272 * modules with devices on the PCI bus.
274 struct pci_device_table {
275 #if BYTE_ORDER == LITTLE_ENDIAN
279 match_flag_subvendor:1,
280 match_flag_subdevice:1,
282 match_flag_subclass:1,
289 match_flag_subclass:1,
291 match_flag_subdevice:1,
292 match_flag_subvendor:1,
304 uintptr_t driver_data;
308 #define PCI_DEV(v, d) \
309 .match_flag_vendor = 1, .vendor = (v), \
310 .match_flag_device = 1, .device = (d)
311 #define PCI_SUBDEV(sv, sd) \
312 .match_flag_subvendor = 1, .subvendor = (sv), \
313 .match_flag_subdevice = 1, .subdevice = (sd)
314 #define PCI_CLASS(x) \
315 .match_flag_class = 1, .class_id = (x)
316 #define PCI_SUBCLASS(x) \
317 .match_flag_subclass = 1, .subclass = (x)
318 #define PCI_REVID(x) \
319 .match_flag_revid = 1, .revid = (x)
320 #define PCI_DESCR(x) \
322 #define PCI_PNP_STR \
323 "M16:mask;U16:vendor;U16:device;U16:subvendor;U16:subdevice;" \
324 "U16:class;U16:subclass;U16:revid;"
325 #define PCI_PNP_INFO(table) \
326 MODULE_PNP_INFO(PCI_PNP_STR, pci, table, table, \
327 sizeof(table) / sizeof(table[0]))
329 const struct pci_device_table *pci_match_device(device_t child,
330 const struct pci_device_table *id, size_t nelt);
331 #define PCI_MATCH(child, table) \
332 pci_match_device(child, (table), nitems(table));
334 /* Only if the prerequisites are present */
335 #if defined(_SYS_BUS_H_) && defined(_SYS_PCIIO_H_)
337 STAILQ_ENTRY(pci_devinfo) pci_links;
338 struct resource_list resources;
340 struct pci_conf conf;
348 enum pci_device_ivars {
373 * Simplified accessors for pci devices
375 #define PCI_ACCESSOR(var, ivar, type) \
376 __BUS_ACCESSOR(pci, var, PCI, ivar, type)
378 PCI_ACCESSOR(subvendor, SUBVENDOR, uint16_t)
379 PCI_ACCESSOR(subdevice, SUBDEVICE, uint16_t)
380 PCI_ACCESSOR(vendor, VENDOR, uint16_t)
381 PCI_ACCESSOR(device, DEVICE, uint16_t)
382 PCI_ACCESSOR(devid, DEVID, uint32_t)
383 PCI_ACCESSOR(class, CLASS, uint8_t)
384 PCI_ACCESSOR(subclass, SUBCLASS, uint8_t)
385 PCI_ACCESSOR(progif, PROGIF, uint8_t)
386 PCI_ACCESSOR(revid, REVID, uint8_t)
387 PCI_ACCESSOR(intpin, INTPIN, uint8_t)
388 PCI_ACCESSOR(irq, IRQ, uint8_t)
389 PCI_ACCESSOR(domain, DOMAIN, uint32_t)
390 PCI_ACCESSOR(bus, BUS, uint8_t)
391 PCI_ACCESSOR(slot, SLOT, uint8_t)
392 PCI_ACCESSOR(function, FUNCTION, uint8_t)
393 PCI_ACCESSOR(ether, ETHADDR, uint8_t *)
394 PCI_ACCESSOR(cmdreg, CMDREG, uint8_t)
395 PCI_ACCESSOR(cachelnsz, CACHELNSZ, uint8_t)
396 PCI_ACCESSOR(mingnt, MINGNT, uint8_t)
397 PCI_ACCESSOR(maxlat, MAXLAT, uint8_t)
398 PCI_ACCESSOR(lattimer, LATTIMER, uint8_t)
403 * Operations on configuration space.
405 static __inline uint32_t
406 pci_read_config(device_t dev, int reg, int width)
408 return PCI_READ_CONFIG(device_get_parent(dev), dev, reg, width);
412 pci_write_config(device_t dev, int reg, uint32_t val, int width)
414 PCI_WRITE_CONFIG(device_get_parent(dev), dev, reg, val, width);
418 * Ivars for pci bridges.
421 /*typedef enum pci_device_ivars pcib_device_ivars;*/
422 enum pcib_device_ivars {
427 #define PCIB_ACCESSOR(var, ivar, type) \
428 __BUS_ACCESSOR(pcib, var, PCIB, ivar, type)
430 PCIB_ACCESSOR(domain, DOMAIN, uint32_t)
431 PCIB_ACCESSOR(bus, BUS, uint32_t)
436 * PCI interrupt validation. Invalid interrupt values such as 0 or 128
437 * on i386 or other platforms should be mapped out in the MD pcireadconf
438 * code and not here, since the only MI invalid IRQ is 255.
440 #define PCI_INVALID_IRQ 255
441 #define PCI_INTERRUPT_VALID(x) ((x) != PCI_INVALID_IRQ)
444 * Convenience functions.
446 * These should be used in preference to manually manipulating
447 * configuration space.
450 pci_enable_busmaster(device_t dev)
452 return(PCI_ENABLE_BUSMASTER(device_get_parent(dev), dev));
456 pci_disable_busmaster(device_t dev)
458 return(PCI_DISABLE_BUSMASTER(device_get_parent(dev), dev));
462 pci_enable_io(device_t dev, int space)
464 return(PCI_ENABLE_IO(device_get_parent(dev), dev, space));
468 pci_disable_io(device_t dev, int space)
470 return(PCI_DISABLE_IO(device_get_parent(dev), dev, space));
474 pci_get_vpd_ident(device_t dev, const char **identptr)
476 return(PCI_GET_VPD_IDENT(device_get_parent(dev), dev, identptr));
480 pci_get_vpd_readonly(device_t dev, const char *kw, const char **vptr)
482 return(PCI_GET_VPD_READONLY(device_get_parent(dev), dev, kw, vptr));
486 * Check if the address range falls within the VGA defined address range(s)
489 pci_is_vga_ioport_range(rman_res_t start, rman_res_t end)
492 return (((start >= 0x3b0 && end <= 0x3bb) ||
493 (start >= 0x3c0 && end <= 0x3df)) ? 1 : 0);
497 pci_is_vga_memory_range(rman_res_t start, rman_res_t end)
500 return ((start >= 0xa0000 && end <= 0xbffff) ? 1 : 0);
504 * PCI power states are as defined by ACPI:
506 * D0 State in which device is on and running. It is receiving full
507 * power from the system and delivering full functionality to the user.
508 * D1 Class-specific low-power state in which device context may or may not
509 * be lost. Buses in D1 cannot do anything to the bus that would force
510 * devices on that bus to lose context.
511 * D2 Class-specific low-power state in which device context may or may
512 * not be lost. Attains greater power savings than D1. Buses in D2
513 * can cause devices on that bus to lose some context. Devices in D2
514 * must be prepared for the bus to be in D2 or higher.
515 * D3 State in which the device is off and not running. Device context is
516 * lost. Power can be removed from the device.
518 #define PCI_POWERSTATE_D0 0
519 #define PCI_POWERSTATE_D1 1
520 #define PCI_POWERSTATE_D2 2
521 #define PCI_POWERSTATE_D3 3
522 #define PCI_POWERSTATE_UNKNOWN -1
525 pci_set_powerstate(device_t dev, int state)
527 return PCI_SET_POWERSTATE(device_get_parent(dev), dev, state);
531 pci_get_powerstate(device_t dev)
533 return PCI_GET_POWERSTATE(device_get_parent(dev), dev);
537 pci_find_cap(device_t dev, int capability, int *capreg)
539 return (PCI_FIND_CAP(device_get_parent(dev), dev, capability, capreg));
543 pci_find_next_cap(device_t dev, int capability, int start, int *capreg)
545 return (PCI_FIND_NEXT_CAP(device_get_parent(dev), dev, capability, start,
550 pci_find_extcap(device_t dev, int capability, int *capreg)
552 return (PCI_FIND_EXTCAP(device_get_parent(dev), dev, capability, capreg));
556 pci_find_next_extcap(device_t dev, int capability, int start, int *capreg)
558 return (PCI_FIND_NEXT_EXTCAP(device_get_parent(dev), dev, capability,
563 pci_find_htcap(device_t dev, int capability, int *capreg)
565 return (PCI_FIND_HTCAP(device_get_parent(dev), dev, capability, capreg));
569 pci_find_next_htcap(device_t dev, int capability, int start, int *capreg)
571 return (PCI_FIND_NEXT_HTCAP(device_get_parent(dev), dev, capability,
576 pci_alloc_msi(device_t dev, int *count)
578 return (PCI_ALLOC_MSI(device_get_parent(dev), dev, count));
582 pci_alloc_msix(device_t dev, int *count)
584 return (PCI_ALLOC_MSIX(device_get_parent(dev), dev, count));
588 pci_enable_msi(device_t dev, uint64_t address, uint16_t data)
590 PCI_ENABLE_MSI(device_get_parent(dev), dev, address, data);
594 pci_enable_msix(device_t dev, u_int index, uint64_t address, uint32_t data)
596 PCI_ENABLE_MSIX(device_get_parent(dev), dev, index, address, data);
600 pci_disable_msi(device_t dev)
602 PCI_DISABLE_MSI(device_get_parent(dev), dev);
606 pci_remap_msix(device_t dev, int count, const u_int *vectors)
608 return (PCI_REMAP_MSIX(device_get_parent(dev), dev, count, vectors));
612 pci_release_msi(device_t dev)
614 return (PCI_RELEASE_MSI(device_get_parent(dev), dev));
618 pci_msi_count(device_t dev)
620 return (PCI_MSI_COUNT(device_get_parent(dev), dev));
624 pci_msix_count(device_t dev)
626 return (PCI_MSIX_COUNT(device_get_parent(dev), dev));
630 pci_msix_pba_bar(device_t dev)
632 return (PCI_MSIX_PBA_BAR(device_get_parent(dev), dev));
636 pci_msix_table_bar(device_t dev)
638 return (PCI_MSIX_TABLE_BAR(device_get_parent(dev), dev));
642 pci_get_id(device_t dev, enum pci_id_type type, uintptr_t *id)
644 return (PCI_GET_ID(device_get_parent(dev), dev, type, id));
648 * This is the deprecated interface, there is no way to tell the difference
649 * between a failure and a valid value that happens to be the same as the
652 static __inline uint16_t
653 pci_get_rid(device_t dev)
657 if (pci_get_id(dev, PCI_ID_RID, &rid) != 0)
664 pci_child_added(device_t dev)
667 return (PCI_CHILD_ADDED(device_get_parent(dev), dev));
670 device_t pci_find_bsf(uint8_t, uint8_t, uint8_t);
671 device_t pci_find_dbsf(uint32_t, uint8_t, uint8_t, uint8_t);
672 device_t pci_find_device(uint16_t, uint16_t);
673 device_t pci_find_class(uint8_t class, uint8_t subclass);
674 device_t pci_find_class_from(uint8_t class, uint8_t subclass, device_t devfrom);
676 /* Can be used by drivers to manage the MSI-X table. */
677 int pci_pending_msix(device_t dev, u_int index);
679 int pci_msi_device_blacklisted(device_t dev);
680 int pci_msix_device_blacklisted(device_t dev);
682 void pci_ht_map_msi(device_t dev, uint64_t addr);
684 device_t pci_find_pcie_root_port(device_t dev);
685 int pci_get_relaxed_ordering_enabled(device_t dev);
686 int pci_get_max_payload(device_t dev);
687 int pci_get_max_read_req(device_t dev);
688 void pci_restore_state(device_t dev);
689 void pci_save_state(device_t dev);
690 int pci_set_max_read_req(device_t dev, int size);
691 int pci_power_reset(device_t dev);
692 uint32_t pcie_read_config(device_t dev, int reg, int width);
693 void pcie_write_config(device_t dev, int reg, uint32_t value, int width);
694 uint32_t pcie_adjust_config(device_t dev, int reg, uint32_t mask,
695 uint32_t value, int width);
696 void pcie_apei_error(device_t dev, int sev, uint8_t *aer);
697 bool pcie_flr(device_t dev, u_int max_delay, bool force);
698 int pcie_get_max_completion_timeout(device_t dev);
699 bool pcie_wait_for_pending_transactions(device_t dev, u_int max_delay);
700 int pcie_link_reset(device_t port, int pcie_location);
702 void pci_print_faulted_dev(void);
704 #endif /* _SYS_BUS_H_ */
707 * cdev switch for control device, initialised in generic PCI code
709 extern struct cdevsw pcicdev;
712 * List of all PCI devices, generation count for the list.
714 STAILQ_HEAD(devlist, pci_devinfo);
716 extern struct devlist pci_devq;
717 extern uint32_t pci_generation;
719 struct pci_map *pci_find_bar(device_t dev, int reg);
720 int pci_bar_enabled(device_t dev, struct pci_map *pm);
721 struct pcicfg_vpd *pci_fetch_vpd_list(device_t dev);
723 #define VGA_PCI_BIOS_SHADOW_ADDR 0xC0000
724 #define VGA_PCI_BIOS_SHADOW_SIZE 131072
726 int vga_pci_is_boot_display(device_t dev);
727 void * vga_pci_map_bios(device_t dev, size_t *size);
728 void vga_pci_unmap_bios(device_t dev, void *bios);
729 int vga_pci_repost(device_t dev);
732 * Global eventhandlers invoked when PCI devices are added or removed
735 typedef void (*pci_event_fn)(void *arg, device_t dev);
736 EVENTHANDLER_DECLARE(pci_add_device, pci_event_fn);
737 EVENTHANDLER_DECLARE(pci_delete_device, pci_event_fn);
739 #endif /* _PCIVAR_H_ */